TWI781070B - Pulse type power tool transmission and touch stop device - Google Patents

Abstract

A pulse-type electric tool transmission and touch stop device, including an electric drive mechanism, an oil pressure pulse mechanism, a coupling assembly, a touch stop device, and an oil pressure shaft; the coupling assembly connects the outer rotor of the electric drive mechanism and the oil pressure pulse mechanism The rear end cover is connected along an axis; the hydraulic rotating shaft is axially connected to an oil storage cylinder of the hydraulic pulse mechanism; the trigger rod of the trigger stop device is axially connected to the rear end cover and passes through the electric drive mechanism A stator shaft corresponds to a touch switch; the shaft coupling assembly includes a shaft coupling bearing and a shaft coupling; the rear end cover is pivotally connected to the shaft coupling, and the shaft coupling is pivotally connected to the extension of the outer rotor, The shaft coupling and the extension part jointly support the shaft coupling bearing; the shaft coupling assembly ensures that the electric drive mechanism and the oil pressure pulse mechanism are aligned on the axis and connected, and the operation of the oil pressure shaft does not deviate from the axis, which has high stability.

Description

Pulse electric tool transmission and touch stop device

The invention relates to the technical field related to electric tools, in particular to a device for driving and stopping a pulse type electric tool.

As shown in Fig. 1, the prior art of the oil pressure pulse power tool, the oil pressure pulse mechanism 94 roughly includes the oil storage cylinder 943 placed in the oil chamber cylinder 942, and the front end cover 944 and the rear end cover 945 are respectively assembled in the oil chamber cylinder 942 At the front and rear ends, the oil pressure rotating shaft 941 penetrates the front cover 944 and is fixed on the oil storage cylinder 943, the rear end cover 945 is connected with the wind drive mechanism 92, and the rear end cover 945 also includes an oil spillway 945A communicating with the oil storage cylinder 943 With the step-type shaft hole 945B, one end of the top lever 946 is inserted into the step-type shaft hole 945B, and the other end passes through the wind drive mechanism 92 and corresponds to the air release switch 93 . Wind driving mechanism 92 can be replaced by electric driving mechanism (motor motor), and air leakage switch 93 is then replaced by the brake switch of motor motor.

During the operation of the oil pressure pulse mechanism 94, when the hydraulic oil in the oil storage cylinder 943 reaches a preset pressure, it will enter the stepped shaft hole 945B through the oil overflow passage 945A to form a thrust, and further push the ejector lever 946 Move towards the deflation switch 93 (or brake switch), and reach the purpose of triggering and stopping the wind-driven mechanism or the electric-driven mechanism.

The stability of the oil pressure rotating shaft 941 is very important, and the key depends on the connection relationship between the rear end cover 945 and the wind (electric) driving mechanism 92. Usually the junction of the two is supported by bearings 98 . Based on this, the spatial configuration and connection relationship between the bearing, the rear end cover and the wind (electric) mechanism need to be carefully considered.

Aiming at the problem of the stability of the hydraulic rotating shaft, the present invention proposes the following solutions.

The technical characteristics and effects of the present invention: a device for driving and stopping a pulse type electric tool, including an electric drive mechanism, an oil pressure pulse mechanism, a coupling assembly, a touch stop device, and an oil pressure shaft; The outer rotor and the rear end cover of the oil pressure pulse mechanism are connected along an axis; the oil pressure rotating shaft is axially connected to an oil storage cylinder of the oil pressure pulse mechanism; the trigger lever of the trigger stop device is axially connected to the rear end cover and Passing through a stator shaft of the electric drive mechanism corresponds to a touch switch; the shaft coupling assembly includes a shaft coupling bearing and a shaft coupling; the rear end cover is pivotally connected to the shaft coupling, and the shaft coupling is pivotally connected to the The extension part of the outer rotor, the shaft coupling and the extension jointly support the shaft bearing; the shaft coupling assembly ensures that the electric drive mechanism and the oil pressure pulse mechanism are aligned on the axis and connected, and the oil pressure shaft does not deviate from the axis, with high stability.

<Prior Technology>

94:Oil pressure pulse mechanism

92:Wind drive mechanism

93: Discharge switch

941: hydraulic shaft

942: oil chamber cylinder

943: oil storage cylinder

944: front cover

945: rear end cover

945A: Spillway

945B: stepped shaft hole

946: top lever

98: Bearing

<this invention>

10: Chassis

11: Subject

111: electric drive room

112: Bearing Room

113: C buckle slot

114: limit ring

12: Front cover

121: Impulse Mechanism Room

13:Back cover

15: shell cover

151: trigger

20: Electric drive mechanism

21: Outer rotor

22: Extension

221: The first extension

222: Second extension

223: rotor shaft hole

23: barrel part

231: Stator chamber

232: support groove

24: Stator

25: Stator seat

251: Stator plate

252: Stator shaft

26: The first self-lubricating support

27: The second self-lubricating support

30: Hydraulic pulse mechanism

31: oil storage cylinder

32: oil chamber cylinder

33: front cover

34: rear end cover

341: Oil spillway

342: Step shaft hole

343: end face

344: Multi-angle connecting shaft

35: positioning ring

36:Hydraulic shaft

40:Touch stop device

41:Touch switch

42:Touch lever

50:Coupling assembly

51:Coupling shaft bearing

511: inner wheel

512: outer wheel

52: Coupling

521: The first shaft section

522:Second shaft section

523: The third shaft segment

524: end face 343

525: Polygon shaft hole

53:C type buckle

Ax: axis

〔Fig. 1〕Cross-section view of prior art of hydraulic pulse pneumatic tool.

[FIG. 2] An external view of the casing of the pulse type electric tool according to the present invention.

[FIG. 3] A schematic plan view of the housing combined with the outer shell according to FIG. 2.

[FIG. 4] An exploded perspective view of the pulse type electric tool of the present invention.

[FIG. 5] A cross-sectional view of a combination according to FIG. 4.

[Fig. 6] Partial enlarged view according to Fig. 5.

[Fig. 7] It is a schematic diagram of operation according to Fig. 6.

In order to illustrate the central idea of the present invention expressed in the column of the above-mentioned summary of the invention, it is expressed in specific embodiments. Various objects in the embodiments are in proportions, dimensions, and The amount of deformation or displacement is drawn instead of the proportion of the actual component, which is described first. And in the following description, the same and symmetrically arranged elements are denoted by the same reference numerals. The use of directional terms in the following descriptions is in accordance with the direction of view and should not be construed as a limitation of this creation. The terms "first" and "second" are only used to describe elements, and should not be understood as indicating or implying relative importance or order.

As shown in FIG. 2 to FIG. 6 , the pulse type electric tool of the present invention includes an electric drive mechanism 20 , an oil pressure pulse mechanism 30 , a coupling assembly 50 , a touch stop device 40 , and an oil pressure shaft 36 . The coupling assembly 50 connects the electric drive mechanism 20 and the hydraulic pulse mechanism 30 along an axis Ax. The hydraulic rotating shaft 36 is axially connected to the front end cover 33 of the hydraulic pulse mechanism 30 along the axis Ax. The trigger stop device 40 is axially connected to the rear end cover 34 of the hydraulic pulse mechanism 30 along the axis Ax.

The assembled assembly of the electric drive mechanism 20 , the hydraulic pulse mechanism 30 , the coupling assembly 50 , the touch stop device 40 and the hydraulic rotating shaft 36 is installed in the casing 10 .

The case 10 includes a main body 11 , a front cover 12 and a rear cover 13 . The main body 11 includes an electric drive chamber 111 , a bearing chamber 112 , and a C-button groove 113 . The front cover 12 includes a pulse mechanism chamber 121 . The electric drive chamber 111 accommodates and positions the electric drive mechanism 20 . The pulse mechanism chamber 121 accommodates the hydraulic pulse mechanism 30 . The bearing chamber 112 corresponds to the shaft coupling assembly 50 , and the shaft coupling bearing 51 of the shaft coupling assembly 50 is positioned in the bearing chamber 112 . The front cover 12 and the rear cover 13 are respectively assembled on the front and rear ends of the main body 11 with threads, and the oil pressure shaft 36 passes through the front cover 12 to connect the tool head (not shown).

The casing 10 is assembled in an outer cover 15 . The outer shell 15 may be a gun-shaped profile with a handle, but is not limited thereto. The outer cover 15 is provided with a trigger 151 electrically coupled with the electric driving mechanism 20 . Pulling or releasing the trigger 151 can control the electrical conduction or interruption of the external power supply and the electric drive mechanism 20 , thereby controlling the start or stop of the electric drive mechanism 20 .

The electric drive mechanism 20 includes an outer rotor 21 , a stator 24 , a stator seat 25 , a first self-lubricating support 26 and a second self-lubricating support 27 .

The outer rotor 21 has an extension portion 22 and a barrel portion 23 sequentially along the axis Ax direction. The extension 22 faces the hydraulic pulse mechanism 30 . The outer surface of the extension portion 22 is arranged along the axis Ax direction to reduce the diameter difference in stages, thereby forming a first extension section 221 and a second extension section 222 . The extension part 22 includes a threaded rotor shaft hole 223 inside, and the rotor shaft hole 223 penetrates the extension part 22 along the axis Ax direction. The barrel portion 23 includes a stator chamber 231 and a support groove 232 formed therein.

The stator 24 is accommodated in the stator chamber 231 .

The stator base 25 includes a stator disk 251 and a stator shaft 252 . The stator shaft 252 extends along the axis Ax, and one end thereof is fixed at the center of the stator disk 251 . The stator shaft 252 extends through the center of the stator 24 , and the other end is sleeved with the first self-lubricating support 26 , and the first self-lubricating support 26 is limited in the support slot 232 . The first self-lubricating support 26 is a helical sliding bearing or other equivalent elements. The hole of the stator shaft 252 runs through the stator shaft 252 and the stator disk 251 along the axis Ax direction.

The second self-lubricating support member 27 is constrained between the stator plate 251 and the barrel portion 23 . It can be a combination of plural balls, or a radial sliding bearing, or other equivalent elements. The rear cover 13 is threadedly assembled on the rear end of the main body 11 so as to limit the engagement of the stator plate 251 , the second self-lubricating support member 27 and the barrel portion 23 along the axis Ax direction.

The oil pressure pulse mechanism 30 generally includes an oil storage cylinder 31 placed in the oil chamber cylinder 32 , and a front end cover 33 and a rear end cover 34 are respectively assembled at the front and rear ends of the oil chamber cylinder 32 . The rear end of the oil chamber cylinder 32 is screwed into a positioning ring 35 , and the positioning ring 35 limits the rear end cover 34 along the axis Ax direction. The hydraulic rotating shaft 36 penetrates the front end cover 33 and is fixed in the oil storage cylinder 31 , and the rear end cover 34 is connected with the electric drive mechanism 20 through the coupling assembly 50 . The rear end cover 34 also includes an oil spill channel 341 and a stepped shaft hole 342 communicating with the oil storage cylinder 31 .

The trigger stop device 40 includes a trigger switch 41 and a trigger lever 42 .

The touch switch 41 and the concentric stator shaft 252 are set on the stator disk 251 and are electrically connected to the electric drive mechanism 20 . When triggered, the electric drive mechanism 20 is disconnected from the external power.

One end of the trigger rod 42 is accommodated in the stepped shaft hole 342 of the rear end cover 34 , and the other end extends through the hole of the stator shaft 252 to correspond to the trigger switch 41 .

The shaft coupling assembly 50 includes a shaft coupling bearing 51 and a shaft coupling 52 .

The outer portion of the shaft coupling 52 has a stepwise reduced diameter difference along the axis Ax, thereby forming a first shaft segment 521 , a second shaft segment 522 , and a third shaft segment 523 . The third shaft section 523 has external threads and is locked to the rotor shaft hole 223 of the outer rotor 21 . The second shaft section 522 of the shaft coupling 52 and the second extension section 222 of the outer rotor 21 jointly support the inner wheel 511 of the shaft coupling bearing 51 . The first shaft section 521 of the shaft coupling 52 and the first extension section 221 of the outer rotor 21 jointly limit the two sides of the inner wheel 511 of the shaft coupling bearing 51 along the axis Ax. The C-shaped buckle 53 is positioned in the C-shaped buckle groove 113 of the housing 10 , together with the limiting ring 114 of the bearing chamber 112 to limit the two sides of the outer wheel 512 of the bearing bearing 51 along the axis Ax.

The connecting shaft member 52 has a polygonal shaft hole 525 penetrating along the axis Ax inside, for the polygonal connecting shaft 344 of the rear end cover 34 of the hydraulic pulse mechanism 30 to pass through. The opposite end surfaces 343 , 524 of the shaft coupling 52 and the rear end cover 34 along the axis Ax abut against each other.

The above is about the spatial arrangement and connection relationship of the constituent members of the present invention. The mode of operation of the present invention is described below.

As shown in Figures 6 to 7, the electric drive mechanism 20 initiates the start, the outer rotor 21 rotates, the extension part 22 of the outer rotor 21 transmits the rotational power to the coupling 52, and the rotation of the coupling 52 drives the oil pressure pulse mechanism 30 to rotate, The oil pressure pulse mechanism 30 drives the oil pressure rotating shaft 36, so that it rotates and tightens a workpiece (not shown).

When the workpiece is tightened, the hydraulic rotating shaft 36 bears the reaction force from the workpiece, thereby increasing At this time, when the hydraulic oil in the oil storage cylinder 31 reaches a preset pressure, it will enter the stepped shaft hole 342 through the oil overflow passage 341 to form a thrust, and further push the trigger lever 42 toward the trigger switch 41 motion, the trigger switch 41 is triggered by the trigger rod 42, and then the electric drive mechanism 20 is stopped.

When the electric drive mechanism 20 drives the hydraulic pulse mechanism 30 to operate, the coupling assembly 50 functions to stabilize the operation of the hydraulic rotating shaft 36 without deviating from the axis Ax. Because the extension 22 of the outer rotor 21 is threadedly engaged with the shaft coupling 52, and the rear end cover 34 of the hydraulic pulse mechanism 30 is threadedly engaged with the shaft coupling 52, according to the extension 22 of the outer rotor 21, the shaft coupling 52, and the oil pressure pulse mechanism 30 are aligned with the axis Ax to achieve tight engagement; in addition, the shaft bearing bearing 51 simultaneously rotates to limit and supports the extension 22 of the outer rotor 21 and the shaft coupling 52, ensuring that the rotor extension 22 and shaft coupling The member 52 and the oil pressure pulse mechanism 30 are always aligned with the axis Ax, and the oil pressure rotating shaft 36 does not deviate from the axis Ax when running, which has high stability.

10: Chassis

11: Subject

111: electric drive room

112: Bearing room

114: limit ring

12: Front cover

13:Back cover

20: Electric drive mechanism

21: Outer rotor

22: Extension

23: barrel part

231: Stator chamber

24: Stator

25: Stator seat

251: Stator plate

252: Stator shaft

26: The first self-lubricating support

27: The second self-lubricating support

30: Hydraulic pulse mechanism

32: oil chamber cylinder

34: rear end cover

344: Multi-angle connecting shaft

35: positioning ring

36:Hydraulic shaft

40:Touch stop device

41:Touch switch

42:Touch lever

50:Coupling assembly

51:Coupling shaft bearing

52: Coupling

521: The first shaft section

522:Second shaft section

523: The third shaft segment

53:C type buckle

Claims (4)

A pulse-type electric tool transmission and touch stop device, including an electric drive mechanism, an oil pressure pulse mechanism, a coupling assembly, a touch stop device, and an oil pressure shaft; The outer rotor is connected with a rear end cover of the oil pressure pulse mechanism along an axis; the oil pressure rotating shaft is axially connected to an oil storage cylinder of the oil pressure pulse mechanism along the axis; a trigger rod of the trigger stop device One end of the shaft is connected to the rear end cover of the oil pressure pulse mechanism along the axis; the touch rod passes through a stator shaft of the electric drive mechanism along the axis and corresponds to a touch switch; the electric drive mechanism, the oil The assembly assembly of the pressure pulse mechanism, the coupling shaft assembly, the trigger stop device and the hydraulic rotating shaft is installed in a casing; it is characterized in that: the shaft coupling assembly includes a shaft coupling bearing and a shaft coupling part; the shaft coupling The outside of the part is provided with a staged diameter difference along the axis to form a first shaft section, a second shaft section, and a third shaft section; the inside of the shaft coupling has a polygonal shaft hole passing through along the axis; The outer rotor includes an extension extending along the axis and toward the hydraulic pulse mechanism; the outer surface of the extension is provided with a stepwise diameter difference along the axis to form a first extension and a second extension The interior of the extension part includes a rotor shaft hole; the rotor shaft hole runs through the extension part along the axis direction; the third shaft section is screwed into the rotor shaft hole; the second shaft section and the second The extension section jointly supports an inner ring of the shaft bearing; the first shaft section and the first extension jointly limit the two sides of the inner ring of the shaft bearing along the axial direction; the shaft bearing An outer wheel is positioned in a bearing chamber of the casing; the rear end cover of the hydraulic pulse mechanism includes a polygonal connecting shaft, and the polygonal connecting shaft is pivoted on The polygonal shaft hole of the shaft coupling. The device for driving and stopping the pulse type electric tool as described in claim 1, wherein a C-shaped buckle is positioned in a C-shaped buckle groove of the casing, and the C-shaped buckle is in common with a limit ring of the bearing chamber. The outer ring constraining the coupling bearing along both sides of the axis. According to claim 1, the device for driving and stopping a pulse type electric tool, wherein the end surfaces of the shaft coupling and the rear end cover facing each other along the axis abut against each other. The device for driving and stopping the pulse type electric tool as described in Claim 1, wherein, the interior of the outer rotor further includes a barrel part communicating with the shaft hole of the rotor; the interior of the barrel part includes a stator chamber and A support slot; the stator chamber is used for accommodating a stator of the electric drive mechanism; a stator shaft is passed through the center of the stator along the axial direction, and a first sleeve is sheathed on the outside of the stator shaft relative to one end of the shaft coupling A self-lubricating support, the first self-lubricating support is limited in the support groove.

Images