CN204603479U - Hand-hold power tool - Google Patents

Abstract

The utility model provides a kind of hand-hold power tool, comprise housing, handle, trigger, motor, output shaft, and work package, work package comprises at least two mounting working chucks, at least two mounting working chucks comprise working shaft respectively, work package is movably connected on housing thus each mounting working chuck in described at least two mounting working chucks can be changed between operating position and off-position, at least two mounting working chucks one of them be in operating position, the working shaft of this mounting working chuck and output shaft axially connect, in at least two mounting working chucks, all the other mounting working chucks are in off-position, the working shaft of these all the other mounting working chucks is angularly arranged with output shaft respectively, housing comprises the main casing extended longitudinally, work package is connected to one end of main casing, motor is arranged at the main casing other end away from work package, handle and main casing are angularly arranged, one end away from main casing on handle is provided with power brick, and the center of gravity of hand-hold power tool is positioned at the grip part of handle.

Description

Handheld Power Tools

technical field

The utility model relates to a hand-held power tool, in particular to a hand-held power tool with at least two working chucks.

Background technique

Hand-held power tools, such as electric drills, are used to drill workpieces such as planks, and the working head used is a drill bit; such as a screwdriver, which can be used to tighten or loosen screws, and the working head used is a screwdriver head. The main shaft of such hand-held power tools is usually equipped with a working chuck for clamping a type of working head required for the work, and the working head of this type may have different specifications. When it is necessary to replace the working head for other work, it is necessary to disassemble the original working head and replace it with a different working head. The process of this working head replacement operation is very cumbersome.

At present, there are some gun drill tools with double work chucks on the market, which can be selected or switched between the two work chucks according to needs. In the prior art, a three-jaw chuck is used to clamp the drill bit. The work chuck is made of metal and has a complex structure, so the weight is heavy; while the other work chuck is used to clamp the screwdriver head. Torque adjustment is required when the head performs the work of screwing. Usually, a mechanical control mechanism is provided at the output end of the fuselage close to the output shaft to realize torque adjustment. When these functional parts with complex structure and heavy weight are applied to the gun When the drilling tool is on, the center of gravity of the whole machine is biased towards the side of the work chuck, and there is still a horizontal distance between the center of gravity and the grip of the handle, so that the operator's wrist is subjected to torque during the operation, which is prone to fatigue.

In addition, the work chuck needs to release the fitting between the work chuck and the output shaft or the lock between the work chuck and the housing before switching positions. Therefore, the operator cannot use the hand that presses the switch to operate, and must use the other hand to operate the operating part. Usually, the operating part needs to keep pressing until the position of the work chuck is changed. As far as the position conversion tool is concerned, the operator must complete the conversion action with the hand that originally held the handle. In this way, the operator will frequently change hands to operate, which is extremely inconvenient to operate. For specific workplaces, such as high altitude, such operations are also not safe.

Utility model content

In order to solve the technical problems of the above technologies, the utility model provides a hand-held power tool with labor-saving operation and good maneuverability.

The utility model is realized in the following way: a hand-held power tool includes: a housing, including a main housing extending longitudinally and a handle set at an angle to the main housing; a motor, arranged in the main housing; an output shaft, The rotation is driven by a motor; the working assembly includes at least two working chucks; the switch is arranged on the handle for controlling the motor; the at least two working chucks respectively include a working shaft, and the working assembly is movably connected to one end of the main housing, Each of the at least two working chucks is switchable between a working position and a non-working position, one of the at least two working chucks is in the working position, and the working shaft of the working chuck is connected to the output The shafts are axially matched, the rest of the at least two working chucks are in the non-working position, and the working shafts of the remaining working chucks are set at an angle to the output shaft; the motor is set away from the working components, and the hand-held power tool also includes a battery The battery pack is connected to the handle and arranged away from the main housing, and the center of gravity of the hand-held power tool is located at the grip portion of the handle.

Preferably, the working shaft is provided with a hexagonal receiving hole for matching the working head.

Preferably, the axes of the working shafts are coplanar. The axes of the working shafts are arranged at an angle between the axes, and the angle is in the range of 60° to 130°.

Preferably, the working assembly is pivotally arranged relative to the casing, and the pivot axis of the working assembly is coplanar with the axis of the output shaft and arranged at an angle. At least two work chucks are fixedly connected and arranged symmetrically with respect to the pivot axis of the work assembly.

Preferably, the hand-held power tool further includes a control mechanism for locking the position of the working assembly relative to the housing, the control mechanism includes a control member adjacent to the switch, and the control member is operable to release the position lock of the working assembly and control the output shaft and the working shaft One of them is unmated. The control part is arranged to move relative to the housing, and the control part moves away from the working component to release the position lock of the working component and control the output shaft to disengage from one of the working shafts. The direction of movement of the control member is parallel to the output shaft.

Preferably, the control mechanism further includes a locking piece set in conjunction with the control piece, and an elastic piece elastically abutting against the control piece, the elastic piece provides the elastic force for the control piece to drive the locking piece to move closer to the working group, and the locking piece can Selectively disengages or mates with the working components. The hand-held power tool also includes a clutch device linked with the locking member. One end of the clutch device is movably coupled to the output shaft, and the other end of the clutch device is selectively disengaged or coupled to one of the working shafts.

Preferably, an in-position prompting mechanism is provided between the working assembly and the housing. The in-position prompting mechanism has an engaged state and a disengaged state. In the engaged state, one of the at least two working chucks reaches the working position. In the disengaged state, at least two The work chuck leaves the working position. The in-position reminder mechanism includes a positioning pin arranged on one of the housing and the working assembly, a positioning groove provided on the other of the housing and the working assembly, and an elastic member abutting against the positioning pin. The positioning pin can optionally Match or disengage with the positioning groove.

Preferably, the hand-held power tool further includes an electronic torque control device operable to adjust the output torque of the at least one working shaft.

Preferably, the main casing includes a main body for accommodating the reduction gearbox, and a front end close to the working assembly, and the distance from the longitudinal axis of the main casing to the top of the front end is smaller than the distance to the top of the main body. When one of the at least two work chucks is in the working position, the distance from the longitudinal axis of the main housing to the top of the work chuck is smaller than the distance to the top of the front end.

Since the center of gravity of the hand-held power tool is located at the grip part of the handle, the user's wrist will not generate torque due to uneven weight distribution of the tool during operation, thereby saving effort in operation. The control part is adjacent to the switch and is movable relative to the housing, and the movement of the control part in the direction away from the working component can realize the release of the position lock of the working component, and can also control the disengagement of the output shaft and one of the working shafts. Therefore, the control part One-button operation realizes two actions, and the operation is convenient; and the operation of the control part is consistent with the movement direction of the switch, which fits the user's operating habits, making the operation of the hand-held power tool better and safer.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is a front view of a hand-held power tool according to an embodiment of the present invention.

Fig. 2 is a front sectional view of the hand-held power tool shown in Fig. 1 .

FIG. 3 is an exploded perspective view of the handheld power tool shown in FIG. 1 .

FIG. 4 is a schematic cross-sectional view along the direction A-A in FIG. 2 .

FIG. 5 is an exploded perspective view of the rack device in FIG. 3 .

FIG. 6 is a partial cross-sectional schematic diagram of the front view direction of the hand-held power tool shown in FIG. 1 .

7 to 9 are schematic cross-sectional views of various states when the control member of the hand-held power tool in FIG. 6 moves to different positions.

FIG. 10 is a schematic cross-sectional view along the B-B direction in FIG. 2 .

FIG. 11 is a schematic cross-sectional view along the direction C-C in FIG. 2 .

Fig. 12 is a front view of the hand-held power tool according to the second embodiment of the present invention.

FIG. 13 is a schematic front view showing the internal structure of the hand-held power tool in FIG. 12 with the half shell removed.

FIG. 14 is a schematic cross-sectional view of the hand-held power tool shown in FIG. 12 in the front view direction.

FIG. 15 is an exploded perspective view of the handheld power tool in FIG. 12 .

FIG. 16 is a three-dimensional schematic view of the sliding assembly in FIG. 15 .

Fig. 17 is a schematic diagram of the flattened structure of the sliding sleeve in Fig. 16 .

FIG. 18 to FIG. 22 are schematic diagrams showing the states of the control member of the hand-held power tool moving to different positions according to the second embodiment of the present invention.

Fig. 23 is a three-dimensional schematic diagram of a hand-held power tool according to a third embodiment of the present invention.

Fig. 24 is a front view of the hand-held power tool in Fig. 23 with the working head removed.

Fig. 25 is a partial left side view of the hand-held power tool in Fig. 24 .

Fig. 26 is a front view sectional view of the hand-held power tool in Fig. 23 .

FIG. 27 is an exploded perspective view of the hand-held power tool in FIG. 23 with the housing removed.

Fig. 28 is a top view of the hand-held power tool in Fig. 23 with the housing removed, and the control member is in the locked position.

Fig. 29 is a cross-sectional view along the direction D1-D1 in Fig. 28 .

Fig. 30 is a cross-sectional view along E1-E1 in Fig. 28 .

FIG. 31 is a top view of the hand-held power tool in FIG. 23 with the housing removed, and the control member is in the unlocked position.

Fig. 32 is a cross-sectional view along the direction D2-D2 in Fig. 31 .

Fig. 33 is a cross-sectional view along E2-E2 in Fig. 31 .

In the picture:

100-Hand-held power tool 2540-Y-shaped slot 318-Control button

10-Shell 2541-Linear groove 319-Groove

10a-half shell 2542, 2543-slash slot 320-work light

12-Main housing 2550-Y-shaped slot 32-Gearbox

14-handle 2551-linear groove 32a-support surface

18-battery pack 2552, 2553-slash slot 330-control mechanism

18a-battery pack shell 18a 256-collar 34-rack device

2-Reversing trigger 26-Installation plate 35-Hook piece

200-Hand-held power tool 26b-Lock slot 35a-Hook part

20, 20', -working components 260-rotating parts 36-racks

202-Reversing trigger 263-Gear part 36a-Rack notch

204-Switch 264-Support sleeve 36b-Rack side wall

206-output shaft 265-locating rib 36c-opening

206a-slot hole 266-annular hole 36d-notch end wall

206b-key tooth 267-pin 37-hook piece

2061-First shaft 268-Location bearing 37a-Hook part

2061a-Protruding shaft 27-Clip joint 38-Pivot

2061b-Connection 28-Coupling 39-Torsion spring

2062-Second axis 28a-Main part 4-Switch

2062a-Protruding shaft 29-Clamp spring 40-Control parts

2062-connection part 30-transmission device 41-drive arm

2062c-ring groove 300-power tool 42-groove

208-motor 301-control part 44-transverse groove

210-housing 301a-unlock button 46a, 46b-chute

210a-half shell 301b-connecting post 50-cam

212-Main shell 302-Elastic part 51-Screw

213-ring guide groove 303-locking piece 52-connecting pin

214-handle 304-side plate 53-guide column

218-battery pack 304a-accommodating slot 54-connecting pin

22-Work Chuck 304b-Slot 6-Output Shaft

220-Drill bit 305-Connector 60-Passive parts

22a-working shaft 306-side arm 62-connecting hole

230-transmission device 307-clutch sleeve 64-opening

232-reduction gearbox 308-return spring 70-gear assembly

24-working chuck 309-locating pin 71-connecting shaft

24a-working shaft 310-casing 72-big gear

24b-Accommodating Hole 311-Elastic Part 8-Motor

240-Screwdriver bit 312-Main housing 80-Transmission assembly

250-control parts 313-guide plate 82-transmission gear

251-Connection 315-Guide column 84-Transmission arm

252-sleeve 316-output shaft

254-Guide groove 317-Control board

Detailed ways

Referring to Fig. 1 to Fig. 3, the hand-held power tool 100 of the present invention is provided with a housing 10, wherein the housing 10 is composed of two half-shells 10a of Huff type connected. The power system includes a motor 8 housed in the casing 10. The motor 8 in this embodiment is an electric motor, and other types of motors, such as air motors and fuel motors, can also be used instead. The housing 10 includes a main housing 12 for housing the motor 8 , and a handle 14 connected to the main housing 12 , the main housing 12 extends along the longitudinal direction, and the handle 14 is arranged at an angle to the main housing 12 . In this embodiment, the main housing 12 and the handle 14 of the multifunctional electric drill 100 are arranged approximately vertically. The end of the handle 14 away from the motor 8 is provided with an energy unit that provides energy for the motor 8. The energy unit in this embodiment uses a battery pack 18, which is detachably connected to the handle 14. The battery pack 18 includes a plurality of The rechargeable battery housed in the battery case 18a is preferably a lithium battery. A switch 4 and a reversing trigger 2 for manually controlling the motor 8 are provided on the handle 14 close to the main housing 12 . The motor 8 of this embodiment can also be optionally arranged on the handle 14 .

The main casing 12 is provided with an output shaft 6 driven by the motor 8 to rotate. In this embodiment, the output shaft axis X1 extends longitudinally along the main casing 12, and the output shaft axis X1 coincides with the motor axis; in other optional solutions , the output axis X1 and the motor axis can be arranged in parallel or at an angle. A transmission device 30 for deceleration is arranged between the output shaft 6 and the motor 8, and the deceleration transmission device 30 is accommodated in a reduction box 32; in this embodiment, the deceleration transmission device 30 is a gear mechanism, preferably a planetary gear mechanism.

The hand-held power tool 100 includes a working assembly 20 movably connected to the housing 10; in this embodiment, the working assembly 20 is located at the end of the main housing 12 away from the motor 8, and the working assembly 20 is pivotally arranged relative to the main housing 12, wherein the working The pivot axis Y1 of the assembly 20 is arranged at an angle α with the output shaft axis X1, and the pivot axis Y1 and the output shaft axis X1 are constantly coplanar. Wherein the angle α is an acute angle, and the range of the angle is set between 30 degrees and 65 degrees, and the preferred range of the angle α is 45 degrees to 65 degrees. The working assembly 20 includes two working chucks 22, 24. The working chuck 22 is fixedly connected to the working chuck 24 and symmetrically arranged on both sides of the pivot axis Y1. The working chucks 22, 24 are respectively provided with a working shaft 22a, 24a, the axes of the working shafts 22a, 24a are arranged at an angle β, which is twice the angle α. When one of the working chucks 22, 24 is in the working position, the axes of the working shafts 22a, 24a are in the same plane as the pivot axis Y1 and the output shaft axis X1. One end of the working shafts 22a, 24a is selectively matched with the output shaft 6, and the other end is used for connecting the working head. The working assembly 20 is so arranged that when it pivots relative to the housing 10, at least one of the working chuck 22 and the working chuck 24 can be rotated to a position where its working shaft is matched with the output shaft 6, so that the output Shaft 6 drives the working shaft of the work chuck to rotate. In this embodiment, the working assembly 20 reciprocates around the pivot axis Y1 relative to the housing 10, so that the working shafts of the working chuck 22 and the working chuck 24 are selectively or alternately mated with the output shaft 6, so that the output shaft 6 alternatively drive the working heads clamped on the working chucks 22, 24 to perform rotating work.

One of the working chuck 22 and the working chuck 24 is set to clamp the drill bit 220, and the other working chuck can be designed according to actual needs, for example, it can be set to clamp the screwdriver bit, or it can be used to clamp the drill bit. Holds a small grinding head for sanding, etc. In another optional solution, one of the working chuck 22 and the working chuck 24 is configured to clamp the screwdriver bit 240 , and the other working chuck can be designed according to the actual work object. In this embodiment, the working chuck 22 is used to clamp the drill bit 220 , and the working chuck 24 is used to clamp the screwdriver bit 240 .

The multi-functional electric drill 100 includes a control member 40 movably arranged relative to the housing 10, and a transmission train arranged between the control member 40 and the working assembly 20. Through the transmission train, the movement of the control member 40 can operatively drive the two work chucks 22 , 24 are interchangeable between the working position and the storage position, that is, the movement of the control member 40 is operable to selectively engage the output shaft 6 with the work chucks 22 , 24 . The control member 40 is arranged on the outside of the main housing 12. The control member 40 of this embodiment can move linearly relative to the housing 10 along the axial direction of the output shaft, and can be operatively moved on the top of the main housing 12 in the form of a sliding cover. , can be used to cover at least part of the movement structure located in the casing 10 . Of course, those skilled in the art can also configure the control member in other forms such as operation buttons.

The transmission system includes a first transmission mechanism and a second transmission mechanism. The linear movement of the control member 40 can operatively control one of the work chucks 22, 24 to be mated or separated from the output shaft 6 through the first transmission mechanism. At the same time, the control member The linear movement of the second transmission mechanism operatively controls the pivoting of the working assembly relative to the housing 10 .

The first transmission mechanism is used to alternatively control the engagement or separation of the working chucks 22 and 24 from the output shaft 6 , and the second transmission mechanism is used to control the rotation of the working assembly 20 relative to the casing 10 .

The first transmission mechanism includes a drive member 50 driven to rotate by the control member 40, a passive member 60 driven by the drive member, and a coupling member 28 driven by the passive member 60. One end of the coupling member 28 is connected to the output shaft 6, and the other end is optionally To be mated or disengaged with one of the working chucks 22, 24, that is to say, one end of the coupling 28 is connected to the output shaft 6, and the other end is selectively mated or disengaged with one of the working shafts 22a, 24a.

Referring to FIG. 3 , a first driving part is provided on the control part 40 , and a transmission part matched with the first driving part is provided on the driving part 50 . The first driving part is a groove 42 (refer to FIG. 4 ) arranged on the inner surface of the control part 40. The driving part 50 can rotate forward or reverse around a fixed pivot axis. The driving part 50 is located between the control part 40 and the reduction box 32. Among them, the driving part of this embodiment adopts a cam 50 , which is installed in the guide post 53 of the reduction box 32 through the rotation of the screw 51 , and the cam 50 takes the center line of the guide post 53 as the pivot axis. Wherein the transmission part is the first connecting pin 52 arranged on the first end surface of the cam 50 close to the control member 40, the first connecting pin 52 engages with the groove 42, and the second end surface opposite to the first end surface on the cam 50 A connecting pin 54 is provided, which extends in an opposite direction to the connecting pin 52 .

The passive part 60 is disposed between the reduction box 32 and the main housing 12 , and one end of the passive part 60 close to the cam 50 is provided with a first connecting part matched with the connecting pin 54 , and the first connecting part is configured to receive the connecting pin 54 The form of the connection hole 62 inserted. The passive member 60 is provided with a second connecting portion, and the second connecting portion is configured in the form of a card slot 64 . Through the connecting pin 54, the rotational movement of the driving member can be converted into the movement of the driven member along the axis parallel to the output shaft. The forward rotation of the driving member drives the passive member to move away from the working assembly 20 along the axial direction of the output shaft, and the reverse rotation of the driving member drives the passive member to move closer to the working assembly 20 along the axial direction of the output shaft.

The coupling part 28 is arranged between the working assembly 20 and the output shaft 6, and can move axially along the output shaft 6. The coupling part includes a main body part 28a and a clamping part 27 fitted on the main part 28a. The main part 28a is connected by a sleeve One end of the form of the output shaft 6 is slidingly fitted, and the other end is mated with the working shafts 22a, 24a of the working chucks 22, 24 alternatively. The periphery of the main body part 28a is provided with an elastic piece, and the elastic piece in this embodiment adopts a compression spring 29; the clamping part 27 is connected to the end of the main body part 28a close to the output shaft 6 for matching with the slot 64 of the passive part 60, and the clamping part 27 The connecting portion 27 is movably sleeved on the peripheral surface of the main body portion 28a, and a collar (not shown) is provided at the end of the main body portion 28a for position limiting, so that the engaging portion 27 can be limited to the main body portion 28a and It will not be separated from the main body part 28a; when the main body part 28a is in the initial position, the engaging part 27 abuts against the collar under the action of the elastic member 29 .

Referring to FIG. 2 and FIG. 4 , in the groove 42 on the inner surface of the control member 40 , the connecting pin 52 is slidably engaged in the groove 42 . The groove 42 in this embodiment is set as a 〕-shaped groove along the extension direction of the main housing 12, and the 〕-shaped groove includes a transverse groove part 44 in the center and inclined groove parts 46a, 46b located at both ends of the transverse groove part 44 and symmetrically distributed. . The groove 42 accommodates a connecting pin 52 that can slide in the groove. In an initial state, the connecting pin 52 is located at the blind end of the chute portion 46a, 46b and abuts against the groove wall.

When the control member 40 moves along the main casing 12 at the initial position and parallel to the axis of the output shaft as shown by the arrow M, the connecting pin 52 engaged in the groove 42 moves along the chute portion 46a of the groove 42, and the connecting pin 52 After a moving stroke a, the cam 50 pivots around the axis of the guide column 53 in the direction indicated by the arrow R1, and the connecting pin 54 rotates correspondingly with the cam 5. Move away from the working component 20; in this embodiment, the moving direction of the passive part 60 is consistent with that of the control part 40. The movement of the passive part 60 causes the clamping part 27 mated with the slot 64 to drive the main part 28a to move with the passive part 60, causing one end of the main part 28a originally mated with the working shaft 22a of the working chuck 22 to disengage from the working shaft 22a. open. Once the main body part 28a is separated from the working shaft 22a, the working assembly 20 is allowed to pivot relative to the housing 10; when the connecting pin 52 moves in the chute part 46a, it descends from the top of the chute part 46a to the transverse groove part 44, and the connecting pin The stroke a traveled by 52 is the unlocking stroke of the control member 40 . When the connecting pin 52 engaged in the groove 42 moves along the transverse groove portion 44 of the groove 42, the cam 5 does not rotate. When the connecting pin 52 engaged in the groove 42 moves along the inclined groove portion 46b of the groove 42, the connecting pin 52 rises from the transverse groove portion 44 to the top of the inclined groove portion 46b, and the cam 5 reverses direction along the direction indicated by the arrow R2. turn.

The second transmission mechanism includes a rack device driven by the control member 40, a gear assembly 70 connected to the rack device, and a transmission assembly 80 driven to rotate by the gear assembly 70, and the transmission assembly 80 is used to drive the working assembly 20 relative to the housing 10 pivot.

5 and 6, the control part 40 is also provided with a second drive part, the second drive part in this embodiment is the drive arm 41 arranged on the control part 40, and the rack device 34 is arranged on the control part and the deceleration part. Between the boxes 32, the rack device 34 includes a retaining assembly matched with the driving arm 41, and a rack 36 for supporting the moving device. The retaining assembly has a locked state and a released state. When the retaining assembly is in the released state, the driving arm 41 The rack device is driven to move axially along the output shaft. When the holding assembly is in a locked state, the driving arm 41 cannot drive the rack device to move axially along the output shaft. The holding assembly in this embodiment includes a pair of hooks 35 and 37 rotatably disposed on the rack 36 , the hooks 35 and 37 are distributed along the axial direction of the output shaft, and the driving arm 41 is operable to move along the axial direction of the output shaft.

The hook parts 35, 37 have a locking position and a release position. When the hook parts 35, 37 are in the release position, the control part 4 drives the rack device 34 to move along the axis parallel to the output shaft through the driving arm 41. When the hook parts 35, 37 one of them is in the locked position, and the control member 4 cannot drive the rack device 34 to move through the driving arm 41 . The end of the rack 36 is formed with a notch 36a along the extending direction of the rack. The two side walls 36b of the notch 36a are respectively provided with openings 36c. The hooks 35, 37 pass through the openings on the side walls 36b of the rack. The pivot 38 of 36c is rotatably disposed in the notch 36a at one end of the rack 36 . The hook parts 35 and 37 are respectively provided with elastic parts, and the elastic parts in this embodiment adopt torsion springs 39 .

Referring to FIG. 6 , the driving arm 41 is disposed on the inner side of the control member 40 and protrudes toward the inside of the casing 10 . Under the action of the torsion spring 39 , the hooks 35 , 37 have a prestress that protrudes from the notch 36 a toward the control member 40 . When the control member 40 is in the initial state, the hook portion 35a of the first hook member 35 is abutted by the driving arm 41 and rotates inwardly against the force of the torsion spring 39 to extend out of the notch 36a.

4 to 7, when the control member 40 moves relative to the housing 10 in a direction parallel to the axis of the output shaft as shown by the arrow M, the driving arm 41 moves together with the control member 40, and the driving arm 41 moves relative to the rack device 34. In the process of moving, the resisting force to the first hook member 35 becomes smaller and smaller until the hook portion 35a of the first hook member 35 rotates into the notch 36a under the force of the torsion spring 39 and connects with the rack groove. The end wall 36d of the opening 36a is engaged and clamped. At this time, move the control member 40 further along the direction shown by the arrow M, the first and second hook members 35, 37 are supported on the supporting surface 32a of the reduction box 32, and the driving arm 41 acts on the first and second hook members 35 , 37 to drive the rack device 34 as a whole to move in the direction indicated by the arrow M. As mentioned above, the control member 40 moves relative to the housing 10. When the connecting pin 52 moves in the first chute portion 46a to the position where it intersects with the transverse groove portion 44, the unlocking stroke a is completed, and the working assembly 20 can allow the relative housing 10 10 to pivot. The current position of the control member 40 in FIG. 7 is the initial position where the driving arm 41 starts to drive the rack device 34 to move as a whole. At this time, the control member 40 is further moved in the direction indicated by the arrow M, and the driving arm 41 approaches the second hook member 37 .

Referring to Fig. 4 and shown in Fig. 8, the connecting pin 52 starts to move in the transverse groove portion 44 at the intersection position of the first inclined groove portion 46a and the transverse groove portion 44 and leans against the second inclined groove portion 46b. The movement stroke b of the groove portion 44 is the switching stroke of the control member 40 , and the working assembly 20 rotates relative to the casing 10 around the pivot axis Y1 . When the control member 40 moves further in the direction indicated by the arrow M, the driving arm 41 presses the second hook member 37 so that the hook portion 37a protrudes to the inside of the rack notch 36a against the elastic force, and the hook portion 37a breaks away from the support surface 32a . When the connecting pin 52 reaches the intersection position between the transverse groove portion 44 and the second chute portion 46b, the control member 40 drives the arm 41 to disengage from the hook portion 37a, and the control member 40 no longer drives the rack device 34 to move as a whole. The movement stroke b of the connecting pin 52 in the transverse groove 44 does not cause the cam 50 to rotate further around the centerline of the guide post 53 and the moving member 60 to move further, but the working assembly 20 rotates through 180 degrees relative to the housing 10 .

Referring to FIG. 4 and FIG. 9 , when the working assembly 20 is rotated so that the working chuck 24 is rotated to the working position, the working shaft 24a is rotated to a position substantially aligned with the main body 28a. Further move the control member 40 to the limit position in the moving direction in the direction indicated by the arrow M, and the connecting pin 52 slides into the second chute portion 46b from the intersection position of the transverse groove portion 44 and the second chute portion 46b and abuts against the second chute portion 46b. The end wall of the groove portion 46b, the movement stroke c of the connecting pin 52 in the second chute portion 46b is the locking stroke of the control member 40, and the control member 40 no longer drives the rack device 34 to move during the movement stroke c. Since the second chute portion 46b and the first chute portion 46a are arranged symmetrically with respect to the transverse groove portion 44, when the connecting pin 52 moves in the second chute portion 46b, the connecting pin 52 drives the cam 50 along the center line of the guide column 53. Turn in the direction of R2. The rotation of the cam 50 drives the passive member 60 to move in the direction opposite to that of the control member 40 . The driven part 60 pushes the clamping part 27 to overcome the force of the compression spring 29 and drives the main body part 28a to move towards the direction of the work chuck, so that the main body part 28a returns to the position where it was disengaged from the work shaft 22a of the work chuck 22 before. The position where the output shaft 6 is mated with the working shaft 24a of the working chuck 24 . Once the output shaft 6 is matched with the working shaft 24a, a position conversion between the work chucks 22 and 24 is completed, and the output shaft 6 drives the matched work chuck 24 to rotate. However, the working chuck 22 cannot be driven to rotate by the output shaft 6 because it rotates to the non-working position.

Stage clip 29 of present embodiment plays the effect of back-moving spring again at the same time, because main body 28a bears the function of transmitting torque after mating with working shaft 24a, so the mating end of working shaft is generally arranged as spline teeth, and main body part The mating end of 28a is correspondingly set as a spline groove for receiving spline teeth (refer to FIG. 11 ). When the main body 28a returns to the process of mating with the working shaft 24a, due to manufacturing tolerances and other reasons, the spline teeth and The spline groove may have angular misalignment, that is to say, the spline teeth of the mating end of the working shaft 24a are not accommodated in the spline groove of the main body 28a, but the active force of the spring 29 on the main body 28a, the mating end The spline groove is closely against the spline tooth of the working shaft. Once the motor 8 is started, the output shaft 6 drives the main body 28a to rotate, and the spline groove of the main body 28a turns an angle relative to the spline tooth. Under the action of force, the spline groove and the spline teeth are engaged, that is to say, the main body 28a automatically resets to the position matched with the working shaft 24a.

The control member 40 moves from the initial position to the limit position along the moving direction, so that the output shaft 6 is disengaged from one of the at least two working chucks 22, 24, and the other of the at least two working chucks 22, 24 pivots to the The position where the output shaft 6 is mated. Wherein, during the movement of the control member 40 from the initial position to the limit position, the output shaft 6 is first disengaged from one of the at least two working chucks 22, 24, then the working assembly 20 pivots relative to the housing 10, and finally the output shaft 6 6 is mated with the other of the at least two work chucks 22,24.

Those skilled in the art can imagine that the control member 40 completes a complete one-way sliding along the arrow M relative to the housing 20 , that is, completes at least two transitions between the work chuck 22 and the work chuck 24 at different positions. The control member 40 moves from an initial position close to the working assembly 20 to a limit position away from the working assembly 20 along a direction parallel to the output shaft, so that the output shaft 6 is disengaged from one of the at least two working chucks 22, 24, The other of the at least two work chucks 22 , 24 is pivoted into a mating position with the output shaft 6 . During the movement of the control member 40 from the initial position to the limit position, the output shaft 6 is first disengaged from one of the at least two working chucks 22, 24, then the working assembly 20 pivots relative to the housing 10, and finally the output shaft 6 and the The other of the at least two work chucks 22, 24 is mated.

As shown by the arrow M, the control member 40 is moved in the opposite direction parallel to the axis of the output shaft to complete a complete sliding, and the working chuck 22 and the working chuck 24 can be connected through the first transmission mechanism and the second transmission mechanism. The position is converted again, that is, the work chuck 24 is replaced by the work chuck 22 mated with the output shaft 6 and driven to rotate by the output shaft 6 , which will not be described in detail here.

Referring to FIG. 3 , FIG. 10 , and FIG. 11 , the gear assembly 70 is disposed in the main housing 12 , and the transmission assembly 80 is disposed between the main housing 12 and the working assembly 20 . The gear assembly 70 includes a large gear 72 meshed with the rack 36 for transmission, and a pinion 74 fixed coaxially with the large gear 72 through a connecting shaft 71 , and the pinion 74 in this embodiment is configured as a helical gear. Wherein the transmission assembly 80 comprises a transmission gear 82 meshed with the pinion 74 and a transmission arm 84 connected with the transmission gear 82, wherein the transmission gear 82 is also set to a helical gear, and the helix angles of the pinion 74 and the transmission gear 82 are all set to 45 degrees to achieve spatially staggered shaft transmission. The transmission arm 84 is connected with the working assembly 20, so that when the rack 36 drives the large gear 72 to rotate, the pinion 74 rotates accordingly, thereby driving the transmission gear 82 to rotate around its axis, and the rotation of the transmission gear 82 drives the transmission arm 84 Rotate with the working assembly 20 around the axis of the transmission gear 82 . In this embodiment, the axis of the transmission gear 82 is coaxial with the pivot axis Y1 of the working assembly 20 . The transmission arm 84 is configured as a transmission hook.

Referring to Fig. 12 to Fig. 15, the hand-held power tool 200 of the second embodiment of the present invention has a similar structure to that of the first embodiment. For the convenience of expression, the same structure will not be repeated, and the different structures will be described in detail below. .

The hand-held power tool 200 has a housing 210, which is composed of two half-shells 210a, the motor 208 is accommodated in the main housing 212, and one end of the handle part 214 is arranged at an angle with the main housing 212, and the angle is about 90 degrees; The other end of the handle part 214 is detachably connected to a battery pack 218, and the battery pack 218 includes a plurality of rechargeable batteries; a switch 204 and a reversing trigger for manually controlling the motor 208 are provided on the handle part 214 near the main housing 212 202.

The main casing 220 is provided with an output shaft 206 driven by a motor 208 , and the axis X2 of the output shaft coincides with the axis of the motor. The output shaft 206 and the motor 208 are provided with a transmission device 230 for deceleration, and the transmission device 230 is accommodated in a reduction box 232 .

The hand-held power tool 200 includes a working assembly 20' movably connected to the housing 210; the working assembly 20' is pivotally arranged relative to the main housing 212. The pivot axis Y2 of the working assembly 20' is arranged at an angle α with the output shaft axis X2. The two working chucks 22, 24 of the working assembly 20' are fixedly connected and arranged symmetrically on both sides of the pivot axis Y2. The working chucks 22, 24 are respectively provided with working shafts 22a, 24a. The center line in the direction of extension is arranged at an angle β. The working chuck 22 is used to hold the drill bit 220 , and the working chuck 24 is used to hold the screwdriver bit 240 .

The main housing 212 is provided with a sliding assembly, and the sliding assembly includes a control member movably disposed outside the main housing 212 and a sliding member disposed inside the main housing 212 . A drive train is provided between the control part and the working assembly 20', and through the drive train, the movement of the control part can operatively drive the working assembly 20' to pivot, so that the positions of the two working chucks 22 and 24 can be converted to each other.

The drive train includes a sliding member driven by the control member and a rotating member driven by the sliding member to rotate. One end of the sliding member is engaged with the output shaft 206, and the other end is selectively disengaged or mated with one of the work chucks. , the rotating member is used to drive the working assembly 20' to pivot relative to the casing.

The control member 250 in this embodiment is also movably disposed on the top of the main housing 212 in the form of a sliding cover, and the sliding member is movably disposed inside the main housing 212 in the form of a sleeve 252 . The rotating member 260 is driven to rotate by the sleeve 252 , wherein the sleeve 252 is fixedly connected to the control member 250 through the connecting portion 251 . The sleeve 252 is provided with a guide groove 254 along the circumference, and the sleeve 252 is loosely fitted with the output shaft 206 , so that when the output shaft 206 is rotated by the motor 208 , the sleeve 252 does not rotate with the output shaft 206 .

The output shaft 206 of this embodiment includes a first shaft 2061 and a second shaft 2062. The first shaft 2061 is provided with a slot 206a, and the second shaft 2062 is provided with a spline 206b. Through the spline 206b and the slot 206a, the first shaft 2061 is movably matched with the second shaft 2062, the rotation of the first shaft 2061 drives the second shaft 2062 to rotate together, and the second shaft 2062 can linearly move relative to the first shaft 2061 along the axis X2 of the output shaft. The first shaft 2061 and the second shaft 2062 are respectively provided with protruding shaft parts 2061a, 2062a protruding in the radial direction at approximately the middle positions of the extending direction, and the rotating member 260 is set on the outside of the protruding shaft parts 2061a, 2062a of the output shaft and is in contact with The output shaft 206 has clearance fit, and the rotation of the output shaft 206 cannot drive the rotating member 260 to rotate.

The rotating member 260 includes a gear portion 263 and a support sleeve 264 fixedly matched with the gear portion 263 , and a positioning rib 265 protruding radially outward is provided on the peripheral surface of the support sleeve 264 . The periphery of the supporting sleeve 264 is further provided with a pair of supporting positioning bearings 268. The positioning bearings 268 are engaged with the main housing 212 so that the positioning bearings 268 can rotate relative to the main housing 212 but cannot move relative to the main housing 212. The positioning bearings 268 is disposed on the same side of the positioning rib 265 , and one of the positioning bearings 268 abuts against the positioning rib 265 to limit the movement of the rotating member 260 relative to the main housing 212 , but the rotating member 260 can rotate relative to the main housing 212 .

The gear part 263 is arranged in a ring shape, and the gear part 263 is sleeved on the end of the support sleeve 264, and the support sleeve 264 and the ring gear part 263 are fixedly connected by a pin 267, and one end of the pin 267 extends into the annular hole 266 of the gear part 263 and The guide groove 254 of the sleeve 252 engages.

The sleeve 252 is fitted on the connecting portion 2062b of the second shaft 2062 through the collar 256, that is to say, the sleeve 252 is fixed between the protruding shaft portion 2062a of the second shaft 2062 and the collar 256; when the control member 250 is in In the initial position, the sleeve 252 is engaged with one of the work chuck shafts 22 a , 24 a such that the motor 208 can drive the work chuck engaged with the sleeve 252 . When the control member 250 drives the sleeve 252 to move from the initial position, the sleeve 252 moves with the second shaft 2062 relative to the first shaft 2061. As a result of the movement, the sleeve 252 is first disengaged from one of the working shafts 22a, 24a. Then, further movement of the control member 250 can make the rotating member 260 pivot relative to the main casing 212 around the output shaft axis X2. Since the working assembly 20' is correspondingly provided with a gear part (not shown) that engages with the gear part 263 for transmission, such a structure makes the rotating member 260 drive the working assembly 20' around the pivot axis when the rotating member 260 rotates around the output shaft axis X2. Y2 rotates.

Referring to Fig. 14, the protruding shaft portion 2062a of the second shaft 2062 of the output shaft is provided with an annular groove 208. It can be inserted into the annular groove 2062c, such a design can reduce the extension length of the main housing 212, the overall volume becomes smaller, the weight becomes lighter, and the hand-held power tool is easier to operate.

Referring to Fig. 14 and Fig. 15, an annular guide groove 213 is provided on the main housing 212 close to the working assembly 20', and the working assembly 20' is provided with a mounting plate 26 that engages and snaps into the guide groove 213. When the working assembly 20 'When rotating around the pivot axis Y2, the mounting plate 26 rotates in the annular guide groove 213, and such a structure makes the rotation more flexible.

Referring to Figures 16 and 17, the guide groove 254 of this embodiment is composed of two Y-shaped grooves 2540 and 2550 arranged side by side and communicated. Wherein the first Y-shaped groove 2540 includes a straight groove 2541, and oblique grooves 2542, 2543 extending from the straight groove 2541 to both sides, and the second Y-shaped groove 2550 includes a straight groove 2551, and from the straight groove 2551 to both sides. Extended diagonal slots 2552,2553. The extended end of the oblique groove 2542 communicates with the extended end of the oblique groove 2552 , and the extended end of the oblique groove 2553 communicates with the extended end of the oblique groove 2543 .

Referring to Fig. 17 and Fig. 18, when the control member 250 is in the initial position, the pin 267 is engaged with the beginning end of the linear groove 2541, and the working chuck 24 is in the working position at this time, that is, the working axis of the sleeve 252 and the working chuck 24 24a mating (refer to Figure 14).

Referring to Figure 17 and Figure 19, when the control member 250 moves parallel to the axis of the output shaft as indicated by the arrow M1, the sleeve 252 is driven to move accordingly, and the pin 267 moves from the beginning end of the linear groove 2541 to the terminal end of the linear groove 2541 Sliding, when the pin 267 slides to the end of the linear groove 2541, the sleeve 252 is disengaged from the working shaft 24a of the working chuck 24, and the passive part 260 remains stationary relative to the main housing 212 during this process.

Referring to Fig. 17 and Fig. 20, the control member 250 is further moved to the limit position along the direction indicated by the arrow M1, the pin 267 slides into the terminal of the linear groove 2541 and enters the oblique groove 2542, and approaches the terminal of the oblique groove 2542, During this process, the sleeve 252 drives the rotating member 260 to rotate around the axis X2 of the output shaft. Since the sleeve 252 is disengaged from the working shaft 24a of the working assembly 20', the rotating member 260 drives the working assembly 20' to rotate around the pivot axis Y2 through the gear part 263. During this process, the working assembly 20' rotates around the pivot axis Y2 turns 90 degrees, and the control member 250 has moved to the preset limit position that can move relative to the main housing 212 at this time.

Referring to Figures 17 to 21, in order to rotate the working chuck 22 to the working position, it is necessary to further rotate the working assembly 20' around the pivot axis Y2 by 90 degrees. At this time, move the control member 250 in the opposite direction to that shown by the arrow M1, that is, the direction shown by the arrow M2, and the pin 267 slides at the end of the inclined line groove 2542 and enters the inclined line groove 2550, and approaches the end of the inclined line groove 2550. The cylinder 252 drives the rotary member 260 to further rotate around the output shaft axis X2, and the working assembly 20' rotates 90 degrees around the pivot axis Y2 again, that is, the working assembly 20' rotates 180 degrees around the pivot axis Y2, and the working chuck 22 rotates work location.

Referring to Figure 17 and Figure 22, when moving in the direction parallel to the axis of the output shaft as shown by the arrow M2, the movement control member 250 returns to its initial position, and the pin 267 slides into the linear groove 2551 at the terminal end of the inclined line groove 2550, and approaches The linear groove 2551 terminates. At this time, the sleeve 252 moves to the initial position with the control member 250, and the sleeve 252 is mated with the working shaft of the work chuck 22. During this process, the passive member 260 remains stationary relative to the main housing 212.

To sum up, the control member 250 reciprocates once along the direction parallel to the axis of the output shaft, and at least two working heads of the working assembly 20' switch at different positions. Those skilled in the art can imagine that the control member 250 moves from the initial position parallel to the axis of the output shaft to the limit position and from the limit position to the initial position in the opposite direction, so that the output shaft 206 and at least two working chucks 22, 24 One of the at least two work chucks 22 , 24 is disengaged, and the other one of the at least two work chucks 22 , 24 pivots to a position where it can engage with the output shaft 206 . During the movement of the control member 250 from the initial position to the limit position, the output shaft 206 is disengaged from one of the at least two working chucks 22, 24 first, and then the working assembly 20 pivots relative to the housing 10; the control member 250 During the movement from the extreme position to the initial position, the working assembly 20 pivots relative to the housing 10 , and then the output shaft 206 is mated with the other one of the at least two working chucks 22 , 24 .

Referring to Fig. 23 to Fig. 33, the hand-held power tool 300 of the third embodiment of the present invention is another modification of the first embodiment. For the convenience of expression, the same structure is represented by the same number and will not be repeated, and different structures will be described in detail below.

Referring to FIGS. 23 to 26 , the hand-held power tool 300 includes a control mechanism 330 for locking the position of the working assembly 20 relative to the housing 310 . Only when the control mechanism 330 unlocks the working assembly 20, the working assembly 20 can rotate relative to the housing 310 around the pivot axis Y3, so that the working chucks 22, 24 can be switched between the working position and the non-working position respectively. When one of the work chucks 22, 24 is in the working position axially mated with the output shaft 316, the other of the work chucks 22, 24 is in the non-working position which forms an angle with the output shaft axis.

The casing 310 includes a main casing 312 extending longitudinally, the working assembly 20 is movably arranged at one end of the main casing 312, the motor 8 is arranged in the main casing 312 away from the working assembly 20, and the output shaft 316 extends longitudinally in the main casing Inside the body 312, the output shaft axis X1 coincides with the motor axis. The hand-held power tool 300 is also provided with a working light 320. The working light 320 of the embodiment of the utility model is arranged on the top of the main housing 312 near the working assembly 20. The working light 320 can be used for lighting when the lighting conditions are insufficient. To brighten the working area in front of the hand-held power tool 300, the working light is preferably an LED light. In this implementation, the working light 320 is controlled by the switch 4; of course, the working light 320 can also be independently controlled in other ways, and selectively turned on according to working conditions.

One end of the handle 14 is connected to the main housing 312 , and the other end is connected to the battery pack 18 . The work chucks 22, 24 are provided with work shafts 22a, 24a, respectively. Referring to Fig. 25, the working shafts 22a, 24a are respectively provided with hexagonal receiving holes (only the receiving holes 24b of the working shaft 24a are shown in the figure) for matching working heads, so that screwdriver bits, drill bits with hexagonal handles are provided. It can be installed or disassembled quickly, eliminating the cumbersome process such as the locking or releasing operation of the three-jaw work chuck. The improved structure of the working chucks 22 and 24 makes the overall structure of the working assembly 20 more compact.

Take the free end of the working chuck 22 in the working position as the starting position of the overall length of the hand-held power tool 300, and take the tail of the housing 310 away from the working chuck 22 as the terminal position of the overall length L1, then the hand-held power tool The distance from the center of gravity G of the power tool 300 to the free end of the work chuck 22 is L2, which accounts for about 7/10 of the length L1 of the whole machine. That is to say, the position of the center of gravity G of the hand-held power tool 300 is set on the handle 14, so that the hand-held tool can avoid generating torque on the operator's wrist due to the center of gravity being close to the working component 20 during the operation process, and reduce operating fatigue. However, the hand-held electric power tool 300 of this embodiment is light and handy in operation and easy to carry.

In this embodiment, the longitudinal axis of the main housing 312 coincides with the axis X1 of the output shaft. The main housing 312 includes a main body part that accommodates the motor 8 and the reduction box 32 in its longitudinal extension direction, and is arranged close to the working assembly 20 and used for The front end of the control mechanism 330 is accommodated. The distance from the longitudinal axis to the top of the main body of the main housing 312 is H1; the distance from the longitudinal axis to the top of the front end of the main housing 312 is H2; The distance at the top of the working chuck in the working position is H3; in this embodiment, the distance H3 is smaller than the distance H2, and the distance H2 is smaller than the distance H1. The housing height of the main housing 312 is set in such a way that when the working head accommodated in the work chuck performs work in a narrow space or at a special angle position, the accessibility of the working head relative to the workpiece is good, and the working head is avoided due to the volume of the host housing. or shape constraints prevent access to the space.

A control knob 318 for controlling the torque is provided near the end of the handle 14 of the battery pack 18. When the work chuck 24 is switched to the working position, the screwdriver head 240 is clamped in the work chuck 24 for performing the screwing work. Adjustment control knob 318 adjusts the output torque required by screwdriver bit 240 to perform the job.

Referring to Fig. 27, the control button 318 is electrically connected with the control board 317 arranged on the handle 14. The control board 317 is integrated with an adjustable resistor or capacitor, and the operation of the control button 318 can change the value of the resistance or capacitor, and the control board 317 realizes Torque adjustment is done electronically. Compared with the conventional arrangement, that is, a mechanical device is arranged in the main housing and the torque is adjusted mechanically, the method of electronically controlling the torque in this embodiment has fewer parts, so the structure is more compact and the weight of the tool is reduced; through effective use of the tool The internal space makes the tool body smaller and the operation more flexible.

27 to 30, the control mechanism 330 includes a control member 301 for manual operation, and an elastic member 302 disposed between the control member 301 and the housing 310, wherein the elastic member 302 elastically contacts the control member 301, so that The control member 301 remains in the locked position under normal conditions. The control member 301 is disposed adjacent to the switch 4 and moves relative to the housing 310 , specifically, the movement direction of the control member 301 is parallel to the axis X1 of the output shaft. The control member 301 includes an unlocking button 301 a exposed from the housing 310 , and a mating portion extending into the housing 310 , and the mating portion includes a pair of connecting posts 301 b. Specifically, the matching portion is located between the switch 4 and the reduction box 32 . The control member 301 moves away from the working assembly 20 to release the position lock of the working assembly 20 and control the output shaft 306 to disengage from one of the working shafts 22a, 24a.

The setting method of the control part 301 enables the operator to simultaneously realize the movement of the handle 14 and the control part 301 with the hand holding the handle 14, and also operate the switch 4 with the same hand. And the other hand of the operator can perform other work such as the position conversion of the working chucks 22, 24, without frequent replacement operations of both hands. In addition, the movement direction of the control part 301 when unlocked conforms to the user's operating habits, that is, the control part 301 is moved away from the working component 20, the position lock of the working component 20 relative to the housing 310 is released, and the control part 301 moves closer to the working component. 20 direction to lock the position of the working assembly 20 relative to the casing 310 .

The control mechanism 330 also includes a locking piece 303 driven by the control piece 301 , and a connecting piece 305 driven by the locking piece 303 . The locking member 303 in this embodiment is set as a double-headed lock plate, and one end surface of the double-headed lock plate close to the working assembly 20 is set in an inverted U shape, and the double-headed lock plate includes a pair of sides extending along the direction of the output shaft and connected plate 304 . The inverted U-shaped end face can be selectively mated with or disengaged from the working assembly 20. When the U-shaped end face is mated with the working assembly 20, the working assembly 30 is locked in the casing 310; when the U-shaped end face is disengaged from the working assembly 20 At this time, the elastic member 302 provides the elastic force that the control member 301 drives the locking member 303 to move close to the working assembly 20, and the working assembly 30 is released from the locked position; thus, the position of the working chuck can be changed by rotating relative to the casing 310 around the pivot axis Y3 . A clutch device is provided between the working assembly 20 and the output shaft 316 in linkage with the connecting piece 305 ; The end of the clutch sleeve 307 close to the output shaft 316 is provided with a return spring 308 , and the end of the clutch sleeve 307 away from the output shaft 316 can be axially mated or disengaged from one of the working shafts 22a, 24a.

The side plates 304 respectively have receiving grooves 304a, and the receiving grooves 304a are oppositely disposed for matching with the connecting posts 301b of the control member 301 respectively. The side plate 304 is also provided with a pair of opposite locking slots 304b. The connecting piece 305 is accommodated in the space formed by the locking piece 303 and mated with the locking piece 303 . Specifically, the connector 305 includes a pair of side arms 306, and a cross arm connecting the side arms 306; wherein the side arms 306 are located inside the pair of side plates 304 and are parallel to the side plates 304, and the cross arms are approximately perpendicular to the side arms 306, The cross arm is provided with a U-shaped notch 306b matched with the clutch sleeve 307 , and the side arms 306 are respectively provided with locking portions 306a protruding laterally and outwardly for matching with the locking groove 304b of the side plate 304 .

The control part 301, the locking part 303, the connecting part 305 and the clutch sleeve 307 of the control mechanism 330 are connected in such a way that when the operator pushes the control part 301 away from the working assembly 20 against the force of the elastic part 302 and the return spring 308 When sliding to the unlocked position, the control part 301 drives the double-headed lock plate to move parallel to the output shaft 316. When the double-headed lock plate moves, it drives the connecting piece 305 to move in the same direction, thereby driving the clutch sleeve 307 to move away from the output shaft 316. The orientation of the working assembly 30 is slid to disengage one of the working shafts 22a, 24a. When the clutch sleeve 307 slides to a position disengaged from one of the working shafts 22a, 24a, the locking member 303 moves to a position disengaged from the working assembly 20 accordingly. At this time, the operator can switch the positions of the working chucks 22 and 24 by pivoting the working assembly 20 relative to the casing 310 .

Once the positions of the work chucks 22 and 24 start to switch, the operator can release the control member 310. When the position conversion of the work chucks 22 and 24 is completed, the control member 310 will automatically return to the locked position under the action of the elastic member 302; , the clutch sleeve 307 automatically returns to the position of mating with one of the working shafts 22a, 24a under the force of the return spring 308, so that the working assembly 20 is locked relative to the position of the casing 310, and at this time, the motor is operated by triggering the switch 4 Drive the working head to perform corresponding work.

The control mechanism 330 is set in such a way that when the control member 301 is in the locking position, not only the output shaft 316 and one of the working shafts 22a, 24a are mated, but also the locking member 303 locks the position of the working assembly 20 relative to the housing 310, Therefore, when the working head performs specific drilling or screwing work, the working assembly 20 is prevented from shaking relative to the housing 310 , and the work is more stable and precise.

In order to quickly change the positions of the work chucks 22 and 24, and to make an accurate judgment when the position is converted to the proper position, the hand-held power tool 300 is also provided with a position prompting mechanism. In this embodiment, the position prompting mechanism is arranged between the working assembly 20 and the housing 310 . The position prompting mechanism has an engaged state and a disengaged state. In the engaged state, one of the at least two working chucks is in the working position, and in the separated state, at least two working chucks are in the non-working position. The positioning prompt mechanism includes a positioning pin 309 disposed on the housing, an elastic member 311 abutting against the positioning pin 309 , and a positioning groove 26 a disposed on the mounting plate 26 of the working assembly 20 . Under the action of the elastic member 311 , the positioning pin 309 always maintains a tendency of biasing towards the mounting plate 26 . When the working assembly 20 is pivoted relative to the housing 310, once the positions of the working chucks 22, 24 are converted into place, the positioning pin 309 will automatically slide into the positioning groove 26a from the mounting plate 26, so that the positioning pin 309 is in contact with the positioning groove 26a. After mating, the position of the working chucks 22, 24 relative to the casing 310 has a basic positioning. The positioning pin 309 of this embodiment is made of metal material, and the working assembly 20 is made of plastic material. Therefore, when the positioning pin 309 slides into the positioning groove 26a under the force of the elastic member 311, a crisp snapping sound can be heard. The operator is given a reminder of the conversion in place, and at the same time has a feeling of conversion in place, that is, the operator can feel that the pivoting force applied to the working component 20 will be reacted by the in-position prompting mechanism. The positions of the positioning pin 309 and the positioning groove 26a in this embodiment are not limited by this embodiment but can be set interchangeably.

By releasing the unlock button 301 a of the control member 301 , the position of the working assembly 20 relative to the housing 310 is automatically locked under the action of the control mechanism 330 . When the unlocking button 301a is moved to the unlocked position, the position locking of the working assembly 20 relative to the housing 310 is released, and the output shaft 306 is disengaged from one of the working shafts. The active force makes the positioning pin 309 disengage from the positioning groove 26a, and the working assembly 20 can pivot relative to the housing 310 to realize the conversion of the working position. Of course, the positioning pin 308 and the working component 20 of this embodiment are not limited to the materials indicated, and can be replaced with other materials. The number of positioning grooves 26a can also be set to match the number of work chucks, so that when the first work chuck is switched to the working position, it can all play a positioning role. The position setting of the positioning groove 26a may correspond to the positions of the work chucks 22, 24, and may also be set according to the specific structure.

In order to make the control part 301 drive the locking part 303 and the connecting part 305 to move stably and synchronously during the movement process, and at the same time, in order to effectively use the internal space of the housing, a guide device is provided on the end of the reduction box 32 close to the working assembly 20, that is, a guide device It is installed at the front end of the reduction box 32 . The guide device includes a guide plate 313 extending axially, and a pair of guide posts 315 extending parallel to the guide plate 313; above; the outer sides of the guide posts 315 are respectively provided with grooves 319 (only one is shown in FIG. 25 ) for accommodating the sliding of the side arms 306 of the connector 305 . When the control part 301 is in the locking position, the locking part 303 is located at the lower front of the guide plate 313 . The control part 301 is operable to drive the locking part 303 to move in the gap and at the same time drive the connecting part 305 to slide in the groove 319 . Such setting makes the structure of the control mechanism 330 more reliable and stable.

Referring to FIG. 28 , the mounting plate 26 is provided with a locking groove 26b, and when the control member 301 is in the locked position, the locking member 303 cooperates with the locking groove 26b to lock. In this embodiment, the ends of a pair of parallel side plates 304 of the double-headed lock plate are respectively engaged in the lock groove 26b, thereby locking the working assembly 20 to the housing 310; in order to reduce the volume of the mechanism and effectively use the space, the lock The action surface of the slot 26b and the locking member 303 is disposed above the control member 301 and below the axis X1 of the output shaft.

30 to 33, when the control member 301 is pushed against the force of the elastic member 302 and the return elastic 308 along the direction shown by the arrow M' parallel to the output shaft 316, the control member 301 can slide to the unlocked position, and then When the locking part 303 moves to the right below the guide plate 313 . The movement of the control part 301 drives the locking part 303 and the connecting part 305 to move in the corresponding direction, thereby causing the clutch sleeve 307 to be disengaged from one of the working shafts 22a, 24a, and the locking part 303 to be disengaged from the working assembly 20, specifically Accordingly, a pair of parallel side plates 304 of the double-headed lock plate are disengaged from the lock groove 26b. At this time, the operator can switch the positions of the working chucks 22 and 24 by pivoting the working assembly 20 relative to the casing 310 . Once the position conversion of the work chucks 22 and 24 is completed, the in-position prompting mechanism will make a snapping sound or have a feeling of being in place. When the control member 310 is released, the control member 310 will automatically return to the locked position under the action of the elastic member 302 .

Claims (10)

1. a hand-hold power tool, comprising:

Housing, the handle comprising main casing extending longitudinally and angularly arrange with main casing;

Motor, is arranged in described main casing;

Output shaft, is driven by motor and rotates;

Work package, comprises at least two mounting working chucks;

Switch, is arranged at described handle, for controlling motor;

It is characterized in that: described at least two mounting working chucks comprise working shaft respectively, described work package is movably connected on main casing one end, thus each mounting working chuck in described at least two mounting working chucks can be changed between operating position and off-position, described at least two mounting working chucks one of them be in operating position, the working shaft of this mounting working chuck and output shaft axially connect, in described at least two mounting working chucks, all the other mounting working chucks are in off-position, and working shaft and the output shaft of these all the other mounting working chucks are angularly arranged; Described motor is arranged away from work package, and hand-hold power tool also comprises power brick, and power brick is connected to handle and arranges away from main casing, and the center of gravity of hand-hold power tool is positioned at the grip part of handle.

2. hand-hold power tool according to claim 1, is characterized in that: described working shaft is provided with the hexagon accepting hole for connecting working head.

3. hand-hold power tool according to claim 1, is characterized in that: the axis co-planar of working shaft is arranged.

4. hand-hold power tool according to claim 1, it is characterized in that: described hand-hold power tool also comprises the controlling organization of relative for work package shell position locking, described controlling organization comprises the control piece of contiguous described switch, and the locking position that described control piece operationally removes work package connects with the disengagement of control one of output shaft and working shaft.

5. hand-hold power tool according to claim 4, it is characterized in that: described control piece moves setting relative to housing, described control piece edge is moved the locking position realizing removing work package and is connected with the disengagement of control one of output shaft and working shaft away from work package direction.

6. hand-hold power tool according to claim 5, is characterized in that: the moving direction of described control piece is parallel to output shaft.

7. hand-hold power tool according to claim 4, it is characterized in that: described controlling organization also comprises the locking piece arranged that to link with control piece, and the elastic component to abut with control piece elasticity, described elastic component provides control piece to drive locking piece near the elastic force of working group's movement, and described locking piece is selectively thrown off with work package or connected.

8. hand-hold power tool according to claim 7, it is characterized in that: described hand-hold power tool also comprises the arrangement of clutch arranged that to link with locking piece, described arrangement of clutch one end is coupled to output shaft movably, and the other end is selectively thrown off with one of working shaft or connected.

9. hand-hold power tool according to claim 1, it is characterized in that: between described work package and housing, be provided with the prompting mechanism that puts in place, the described prompting mechanism that puts in place has engagement and released state, during engagement, one of them arrival operating position of described at least two mounting working chucks, during released state, described at least two mounting working chucks leave operating position, thus the prompting mechanism that makes to put in place is in engagement or released state.

10. hand-hold power tool according to claim 9, it is characterized in that: described in the prompting mechanism that puts in place comprise the alignment pin being arranged at one of housing and work package, be arranged at another locating slot of housing and work package, and the elastic component to abut with alignment pin, described alignment pin selectively connects with described locating slot or throws off.