CN203266537U

CN203266537U - Electric screwdriver

Info

Publication number: CN203266537U
Application number: CN 201320295093
Authority: CN
Inventors: 吴亚定
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-27
Filing date: 2013-05-27
Publication date: 2013-11-06
Anticipated expiration: 2023-05-27

Abstract

The utility model discloses an electric screwdriver. The electric screwdriver comprises a handle outer shell, a handle cap, a high-voltage direct-current electric motor, a control circuit, a deceleration torque converter, a main shaft, a connecting shaft and a bend assembly. The high-voltage direct-current electric motor, the control circuit, the deceleration torque converter and the main shaft are all arranged in the handle outer shell. The main shaft penetrates through the handle cap to output torsion of the electric screwdriver. The bend assembly comprises a bend base, a bend cover, an output shaft and a pair of screwing gears, wherein one screwing gear is arranged on the output shaft, the other screwing gear is arranged at the front end of the connecting shaft, the output shaft and the connecting shaft are fixed through bearings and enable the screwing gears to be arranged in the bend base, the rear end of the connecting shaft is connected with the main shaft, and the connecting shaft shares the same center axis as the main shaft. The electric screwdriver is strong in practicability, torsion can be adjusted at will, the torsion is constant and precise, electric supply is directly used for operation of the electric screwdriver, the defect that a straight-rod-type electric screwdriver cannot be used at a narrow work station is overcome, and the electric screwdriver is suitable for an assembly line and various maintenance and installation situations.

Description

Electric screw driver

Technical field

The utility model relates to field of power tools, particularly relates to a kind of electric screw driver that various stations especially can use in narrow workspace that adapts to.

Background technology

Electric screw driver in the market is straight-bar type, can't use in narrow workspace, only has manually to operate, and efficient is low, and station is nervous even manually also very difficult operation makes the torsion of holding screw not reach requirement and affect product quality sometimes.This makes a kind of electric screw driver that uses narrow workspace that adapts to of research and development seem very important.

Summary of the invention

Problem to be solved in the utility model is the defective that overcomes above-mentioned prior art, and a kind of electric screw driver that various stations especially can use in narrow workspace that adapts to is provided.

the technical solution of the utility model is: the utility model comprises handle casing, handle cap, HVDC motor and control circuit, slow down to become and turn round case, main shaft, connecting axle and elbow assembly, described HVDC motor and control circuit, slow down to become and turn round case, main shaft all is installed in described handle casing, described main shaft passes the torsion of handle cap output electric screw driver, described elbow assembly comprises elbow seat and lid thereof, output shaft and a pair of tooth that revolves, one of them revolves the tooth device on described output shaft, another revolves the tooth device at described connecting axle front end, described output shaft and described connecting axle are fixed by bearing respectively a pair of tooth that revolves are installed in described elbow seat, described connecting axle rear end connects described main shaft and and the concentricity axle of described main shaft.

The described tooth that revolves is the tooth that revolves of a pair of 45 °, and described elbow assembly can be around 360 ° of rotations of central shaft of described connecting axle and described main shaft.

described deceleration change is turned round case and is comprised casing, push rod, collar, trim ring, the moment spring, ring gear, planetary wheeling assembly, the rear end of casing is a cylindrical cavity, two circumferential axially extending bores are arranged on the tank wall of casing front end, through hole extends through in cavity outside casing, two push rods penetrate in two through holes, trim ring, the moment spring, collar is enclosed within casing front end neck successively, trim ring is pressed on push rod, main shaft is arranged in the neck of casing by bearing, ring gear embeds the cavity of casing, the front end face of ring gear has two rollers to contact with push rod, ring gear is connected with the output gear of HVDC motor by the two-stage planetary wheeling assembly.

Described control circuit comprises cable plug, forward-reverse switch and switch sleeve, switch depression bar and Pressure-bar spring, the circuit board that connects civil power.

The beneficial effects of the utility model are: main shaft of the present utility model passes handle casing by connecting axle connecting bend assembly, can export to the torsion of electric screw driver on batch mouth that is contained in screwdriver through the output shaft of main shaft, connecting axle and elbow assembly, can realize the function in the use of narrow workspace, to avoid manually-operated trouble, to improve work efficiency; A pair of 45 ° of device revolves tooth and becomes the elbow of 90 ° to form with the electric screw driver main shaft in elbow assembly of the present utility model, and the elbow assembly can around 360 ° of rotations of alignment of shafts axle, adapt to the demand of various stations more easily; The utility model deceleration becomes the ring gear front end face device of turning round case has roller to contact with push rod, forms safety clutch, and frictional force is evenly distributed on end face of ring gear, thereby makes the torsion of the actual output of screwdriver bits and set value more consistent; The utility model adopts the HVDC motor, and civil power converts to through control circuit does not suitablely need external potential device to the power supply of HVDC motor during use, uses, easy to carry.

Description of drawings

Fig. 1 is STRUCTURE DECOMPOSITION schematic diagram of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is made concrete detailed description.

As shown in Figure 1, electric screw driver described in the utility model comprises that handle casing 1, handle cap 2, HVDC motor 3 and control circuit, deceleration become to turn round case, main shaft 4, connecting axle 5 and elbow assembly.case is turned round in HVDC motor 3 and control circuit, deceleration change, main shaft 4 all is installed in handle casing 1, and main shaft 4 passes the torsion of handle cap 2 output electric screw drivers, the elbow assembly comprise elbow seat 10 and cover 11, output shaft 12 and a pair of 45 ° revolve tooth 13, one of them revolve tooth 13 by the jump ring fixture on output shaft 12, another revolve tooth 13 by the jump ring fixture at connecting axle 5 front ends, output shaft 12 and connecting axle 5 are fixed by bearing respectively a pair of tooth 13 that revolves are installed in elbow seat 10, connecting axle 5 rear ends connect main shaft 4 also and the concentricity axle of main shaft 4, and the elbow assembly can be done 360 ° of rotations around the central shaft of connecting axle 5 and main shaft 4, the change of slowing down is turned round case and is comprised casing 20, push rod 21, collar 22, trim ring 23, moment spring 24, ring gear 25, planetary wheeling assembly 26, the rear end of casing 20 is a cylindrical cavity, two circumferential axially extending bores 27 are arranged on the tank wall of casing 20 front ends, through hole 27 extends through in cavity outside casing 20, two push rods 21 penetrate in two through holes 27, trim ring 23, moment spring 24, collar 22 is enclosed within casing 20 front end necks successively, trim ring 23 is pressed on push rod 21, main shaft 4 is arranged in the neck of casing 20 by bearing, ring gear 25 embeds the cavity of casing 20, the front end face of ring gear 25 has two rollers 28 to contact with push rod 21, ring gear 25 is connected with the output gear of HVDC motor 3 by two-stage planetary wheeling assembly 26, control circuit comprises cable plug 30, forward-reverse switch 31 and switch sleeve 32, switch depression bar 33 and Pressure-bar spring 34, the circuit board 35 that connects civil power.

The utility model directly inserts civil power in use, and the cable by cable plug 30 is delivered to control circuit, is converted into high voltage direct current through control circuit, controls the startup of HVDC motor 3 and stops through switch 31.During electric screw driver work, HVDC motor 3 gets electric rotation, deceleration through two groups of planetary gear set 26 drives main shaft 4 rotations, a pair of in connecting axle 5, elbow assembly revolves tooth 13 and drives with the output shaft 12 of 4 one-tenths 90 °, main shaft and criticize mouth and rotate and tighten the screws again, after screw tightening, output shaft 12, connecting axle 5 and main shaft 5 all stop operating, the roller 28 that device is turned round case ring gear 25 front ends in the change of slowing down just forms overload clutch with push rod 21, sheds most of load that HVDC motor 3 bears.Roller 28 evenly distributes at end face of ring gear, can guarantee that the actual torsion of electric screw driver output is comparatively constant accurately, does not produce error.The utility model can change original vertical torsion and be output into horizontal torsion output, can reach special station user demand.The utility model is practical, can arbitrarily regulate torsion, and torsion is constant accurately directly adopts civil power work, has overcome the defective that the straight-bar type electric screw driver can't use at narrow station, is fit to assembling line and various maintenance, occasion is installed.

Claims

1. electric screw driver, comprise handle casing (1), handle cap (2), HVDC motor (3) and control circuit, slow down to become and turn round case, main shaft (4), described HVDC motor (3) and control circuit, slow down to become and turn round case, main shaft (4) all is installed in described handle casing (1), described main shaft (4) passes the torsion of handle cap (2) output electric screw driver, it is characterized in that: also comprise connecting axle (5) and elbow assembly, described elbow assembly comprises elbow seat (10) and lid (11) thereof, output shaft (12) and a pair of tooth (13) that revolves, one of them revolves tooth (13) device on described output shaft (12), another revolves tooth (13) device at described connecting axle (5) front end, described output shaft (12) and described connecting axle (5) are fixed by bearing respectively a pair of tooth (13) that revolves are installed in described elbow seat (10), described connecting axle (5) rear end connects described main shaft (4) and and the concentricity axle of described main shaft (4).

2. electric screw driver according to claim 1 is characterized in that: the described tooth (13) that revolves is the tooth that revolves of a pair of 45 °, and described elbow assembly can be around 360 ° of rotations of central shaft of described connecting axle (5) and described main shaft (4).

3. electric screw driver according to claim 2, it is characterized in that: described deceleration change is turned round case and is comprised casing (20), push rod (21), collar (22), trim ring (23), moment spring (24), ring gear (25), planetary wheeling assembly (26), the rear end of casing (20) is a cylindrical cavity, on the tank wall of casing (20) front end, two circumferential axially extending bores (27) are arranged, through hole (27) extends through in cavity outside casing (20), two push rods (21) penetrate in two through holes (27), trim ring (23), moment spring (24), collar (22) is enclosed within casing (20) front end neck successively, trim ring (23) is pressed on push rod (21), main shaft (4) is arranged in the neck of casing (20) by bearing, ring gear (25) embeds the cavity of casing (20), the front end face of ring gear (25) has two rollers (28) to contact with push rod (21), ring gear (25) is connected with the output gear of HVDC motor (3) by two-stage planetary wheeling assembly (26).

4. according to claim 2 or 3 described electric screw drivers, it is characterized in that: described control circuit comprises cable plug (30), forward-reverse switch (31) and switch sleeve (32), switch depression bar (33) and Pressure-bar spring (34), the circuit board (35) that connects civil power.