CN112223192A

CN112223192A - Electric wrench

Info

Publication number: CN112223192A
Application number: CN202010924605.5A
Authority: CN
Inventors: 赵威
Original assignee: Jinyun Zhaoshi Tools Co ltd
Current assignee: Jinyun Zhaoshi Tools Co ltd
Priority date: 2020-09-05
Filing date: 2020-09-05
Publication date: 2021-01-15

Abstract

The invention discloses an electric wrench, which comprises a shell, a motor fixing device for fixing the motor, a rotating shaft, a transmission device for connecting the rotating shaft and a motor output shaft, a bolt sleeve, a sleeve connecting device for connecting the bolt sleeve and the rotating shaft, a power socket and a control device for controlling the rotation of the motor, wherein the transmission device comprises a connecting block detachably arranged on the motor output shaft, an inserting rod arranged on the connecting block, a transmission block, a connecting shaft arranged on the transmission block, a bearing arranged on the transmission shaft, a baffle arranged on the rotating shaft, a control rod arranged on the transmission block and a control assembly for controlling the control rod to move left and right, the connecting shaft is provided with a slot matched with the inserting rod, and the transmission block is provided with a through hole for the rotating shaft to penetrate through.

Description

Electric wrench

Technical Field

The invention belongs to the technical field of electric wrenches, and particularly relates to an electric wrench.

Background

The electric wrench is a wrench using a power supply or a battery as power and is a tool for screwing a high-strength bolt, so the electric wrench is also called a high-strength bolt gun and mainly comprises an impact wrench, a torsional shear wrench, a fixed torque wrench, a corner wrench and an angular wrench. The rotating shaft of the existing electric wrench is mostly fixedly connected with the output shaft of the motor, and the motor is just started and drives the bolt sleeve to rotate, so that the starting torque is smaller, and a workpiece is difficult to twist.

Disclosure of Invention

The invention provides an electric wrench for overcoming the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: an electric wrench comprises a shell, a motor fixing device for fixing the motor, a rotating shaft, a transmission device for connecting the rotating shaft and a motor output shaft, a bolt sleeve, a sleeve connecting device for connecting the bolt sleeve and the rotating shaft, a power socket and a control device for controlling the rotation of the motor, wherein the transmission device comprises a connecting block detachably arranged on the motor output shaft, an inserting rod arranged on the connecting block, a transmission block, a connecting shaft arranged on the transmission block, a bearing arranged on the transmission shaft, a baffle arranged on the rotating shaft, a control rod arranged on the transmission block and a control assembly for controlling the control rod to move left and right, the connecting shaft is provided with a slot matched with the inserting rod, and the transmission block is provided with a through hole for the rotating shaft to penetrate through; when using electric spanner, earlier through controlling means starter motor, the motor will drive the transmission piece and rotate, and after the certain rotational speed was reachd to the transmission piece, control assembly will promote the control lever and stretch out and contact with the baffle, and then the transmission piece will drive the pivot and rotate to guarantee the telescopic start torsional force of bolt.

Preferably, the control assembly includes the symmetry and locates fixed block on the driving block, locates mounting groove on the through-hole inner wall, locate limiting plate on the control rod tip, locate clamp plate, cover on the fixed block are located first elastic component on the control rod, can drive the clamp plate rotates the arm-tie that pushes down the control rod, locates balancing weight on the arm-tie tip and locating fixed plate on the fixed block.

Preferably, the pressing plate is provided with a pressing part, a connecting part and driving parts, the pulling plate is provided with a first arc-shaped groove matched with the driving parts, a second arc-shaped groove is arranged between the two driving parts, and the fixing block is provided with a rotating groove matched with the connecting part; when the counter weight block reaches a certain rotating speed, the counter weight block drives the pull plate to move towards the outside of the transmission block under the action of centrifugal force, the pull plate moves to drive the press plate to rotate, so that the lower pressing part of the press plate pushes the control rod to extend out of the transmission block, and the control rod is contacted with the baffle plate to drive the rotating shaft to rotate; the second arc-shaped groove is arranged to prevent the pressing plate from colliding with the connecting shaft in the rotating process.

Preferably, the sleeve connecting device comprises a connecting rod provided with a mounting hole, a second elastic piece arranged in the mounting hole, a ball arranged on the end part of the second elastic piece and a guide post arranged on the end part of the connecting rod; the second elastic piece pushes the ball, so that the bolt sleeve can be clamped on the connecting rod, and the bolt sleeve is prevented from falling off from the connecting rod; the guide post is arranged, so that the bolt sleeve can be conveniently rotated, and the connecting rod and the spiral sleeve are aligned and clamped in.

Preferably, the end part of the connecting rod is provided with a guide surface, and the connecting rod is provided with an arc-shaped bulge; the guide surface can guide the bolt sleeve to be clamped on the connecting rod, so that the bolt sleeve is convenient to mount; set up the protruding intensity that both can strengthen the connecting rod of arc, still be convenient for produce the connecting rod.

Preferably, the motor fixing device comprises an inserting plate arranged on the motor and a clamping plate arranged on the shell.

Preferably, the clamping plate comprises a fixing part, bending parts symmetrically arranged at two sides of the fixing part and a clamping part obliquely arranged on the bending parts, and the bending parts are vertically arranged on the fixing part; the clamping part is obliquely arranged, so that the elasticity of the clamping part can be improved, the insertion plate can be conveniently inserted into a clamping groove formed by the clamping part and the bending part, and the buffering and damping effects can be further achieved on the liveliness generated by the work of the motor.

To sum up, when using electric spanner, earlier through controlling means starter motor, the motor will drive the transmission piece and rotate, and after the transmission piece reachd certain rotational speed, control assembly will promote the control lever and stretch out with the baffle contact, and then the transmission piece will drive the pivot and rotate to guarantee the telescopic start torsional force of bolt.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a partial structural schematic diagram of the housing.

Fig. 4 is an enlarged view of fig. 3 at a.

Fig. 5 is a schematic diagram of the transmission.

Fig. 6 is a plan view of fig. 5.

Fig. 7 is an enlarged view of fig. 5 at a.

Fig. 8 is a schematic diagram of the connection between the shaft and the connecting rod.

Fig. 9 is a schematic diagram of the control device.

Fig. 10 is an enlarged view of fig. 9 at a.

Fig. 11 is a schematic view of the engagement of the pressing plate and the pulling plate.

Fig. 12 is an exploded view of the present invention.

Detailed Description

As shown in fig. 1 to 12, an electric wrench includes a housing 1, a motor 2, a motor fixing device, a rotating shaft 3, a transmission device, a bolt sleeve, a sleeve connection device, a power socket 9, and a control device, wherein the motor 2 is a conventional motor and is fixed in the housing by the motor fixing device, specifically, the motor fixing device includes an inserting plate 21 and a clamping plate 22, and the inserting plate 21 is fixed on an end portion of the motor by a screw; the clamping plate 22 is symmetrically fixed in the shell, the clamping plate 22 comprises a fixing part 221, a bending part 222 and a clamping part 223, and the fixing part 221 is horizontally fixed on the inner wall of the shell; the bending parts 222 are symmetrically fixed on two sides of the fixing part, and the bending parts are vertically fixed on the fixing part; the clamping portion 223 is obliquely fixed on the bending portion, and is bent towards the fixing portion, and the clamping portion and the bending portion just can form a clamping groove for inserting the insert plate.

Specifically, the transmission device comprises a connecting block 41, an inserting rod 42, a transmission block 43, a connecting shaft 44, a bearing 45, a baffle 46, a control rod 47 and a control assembly, wherein the connecting block 41 is inserted on an output shaft of the motor and can rotate along with the rotation of the output shaft of the motor; the inserted bar 42 is fixed on the connecting block and is a square bar; the connecting shaft 44 is provided with a slot for inserting an inserted rod; the transmission block 43 is fixed on the end part of the connecting shaft and is provided with a through hole for the rotating shaft to be inserted and rotated; the bearing 45 is sleeved on the connecting shaft; the baffle 46 is fixed on the rotation and is provided with an arc-shaped curved surface 461, so that the contact area between the baffle and the control rod can be increased, and the damage caused by the impact between the baffle and the control rod is reduced; the control rod 46 is arranged on the transmission block in a penetrating way and can move left and right relative to the transmission block.

Further, the control assembly comprises a fixing block 481, a mounting groove 482, a limiting plate 483, a pressing plate 484, a first elastic piece 485, a pulling plate 487, a balancing weight 488 and a fixing plate 489, wherein the fixing block 481 is symmetrically fixed on the transmission block, and a rotating groove is formed in the fixing block; the mounting groove 482 is formed in the transmission block; the limiting plate 483 is fixed on the end part of the control rod; the first elastic piece 485 is a spring, is sleeved on the control rod, and is fixed on the limiting plate at one end and fixed at the bottom of the mounting groove at the other end; the pressing plate 484 includes a pressing part 4841, a connecting part 4842 and a driving part 4843, the connecting part 4842 is symmetrically arranged on both sides of the pressing part and is arranged in the rotating groove of the fixing block; the driving part 4843 is vertically fixed on the pressing part, the pulling plate is provided with a first arc-shaped groove 4871 matched with the driving part, and the driving part is provided with a second arc-shaped groove 48431; the balancing weight 488 is fixed on the end part of the pulling plate; the fixing plate 489 is fixed to the top of the fixing block by screws and used for fixing the pressing plate.

Specifically, the sleeve connecting device comprises a connecting rod 51, a second elastic element 52, a ball 53 and a guide column 54, wherein the connecting rod 51 is fixed on the end part of the rotating shaft and is provided with a mounting hole, and the connecting rod is provided with a guide surface 511 and an arc-shaped bulge 512; the second elastic element 52 is a spring fixed in the mounting hole; the ball 53 is fixed on the end part of the second elastic element; the guide posts 54 are fixed to the ends of the connecting rods.

Specifically, the control device comprises a controller 61, a press switch 62, a limit baffle 63, a control plate 64, a push plate 65, a rotating shaft 66, a connecting plate 67, a slide rod 68, a limit tooth 69 and an elastic bulge 60, wherein the controller 61 is electrically connected with a power socket and a motor; the push switch 62 can control the controller by pushing; preferably, three limiting baffles 63 are provided, wherein two of the limiting baffles are symmetrically fixed on two sides of the top of the push switch, the third limiting baffle is fixed in the middle of the top of the push switch, and the end part of the limiting baffle in the middle of the third limiting baffle is provided with a third arc-shaped groove 631; the rotating shaft 66 is rotatably connected to the controller; the connecting plate 67 is fixed on the rotating shaft; the control plate 64 is fixed on the connecting plate and is provided with an arc-shaped bending surface 641 which can be just clamped into the third arc-shaped groove; the sliding rod is fixed on the connecting plate; the push plate 65 is arranged on the shell in a penetrating way, a moving groove 651 for the sliding rod to pass through is arranged on the push plate, and an arc-shaped inclined surface 652 is arranged at the end part of the push plate; the limit teeth 69 are fixed on the rotating shaft; the resilient protrusions 60 are made of rubber and are fixed to the controller and can be snapped into the retaining teeth.

The bubble level 8 is fixed to the top of the housing.

Claims

1. The utility model provides an electric wrench, includes casing (1), motor (2), is used for fixed motor's motor fixing device, pivot (3), is used for connecting transmission, bolt sleeve of pivot and motor output shaft, connects the muffjoint device, power socket (9) and the control of bolt sleeve and pivot motor pivoted controlling means, its characterized in that: transmission is including dismantling to locate motor output epaxial connecting block (41), locate inserted bar (42), transmission piece (43) on the connecting block, locate connecting axle (44) on the transmission piece, locate epaxial bearing of transmission (45), locate change epaxial baffle (46), locate control lever (47) and control on the transmission piece control assembly that the control lever removed about, the connecting axle is equipped with and inserts the slot of pole complex, the transmission piece is equipped with the through-hole that supplies the pivot to penetrate.

2. An electric wrench as claimed in claim 1, characterized in that: the control assembly comprises a fixing block (481) symmetrically arranged on the transmission block, a mounting groove (482) arranged on the inner wall of the through hole, a limiting plate (483) arranged at the end part of the control rod, a pressing plate (484) arranged on the fixing block, a first elastic part (485) sleeved on the control rod, a pulling plate (487) driving the pressing plate to rotate to press down the control rod, a balancing weight (488) arranged at the end part of the pulling plate and a fixing plate (489) arranged on the fixing block.

3. An electric wrench as claimed in claim 3, wherein: the clamp plate is equipped with splenium (4841), connecting portion (4842) and drive division (4843) down, the arm-tie is equipped with first arc recess (4871) with drive division complex, be equipped with second arc recess (48431) between two drive divisions, the fixed block is equipped with and rotates the groove with connecting portion complex.

4. An electric wrench as claimed in claim 1, characterized in that: the sleeve connecting device comprises a connecting rod (51) provided with a mounting hole, a second elastic piece (52) arranged in the mounting hole, a ball (53) arranged on the end part of the second elastic piece and a guide post (54) arranged on the end part of the connecting rod.

5. An electric wrench as claimed in claim 4, wherein: the connecting rod (51) tip is equipped with guide face (511), the connecting rod is equipped with arc arch (512).

6. An electric wrench as claimed in claim 1, characterized in that: the motor fixing device comprises an inserting plate (21) arranged on the motor and a clamping plate (22) arranged on the shell.

7. An electric wrench as claimed in claim 6, wherein: the clamping plate comprises a fixing part (221), bending parts (222) symmetrically arranged on two sides of the fixing part and clamping parts (223) obliquely arranged on the bending parts, and the bending parts are vertically arranged on the fixing part.