CN114147659A

CN114147659A - Electric wrench capable of being adjusted in self-adaptive mode

Info

Publication number: CN114147659A
Application number: CN202111657199.1A
Authority: CN
Inventors: 刘江; 夏俊杰; 徐逸非; 徐皓; 黄嘉骏; 杨远见; 吴祖正; 王博; 方雷
Original assignee: Chongqing Vocational Institute of Engineering
Current assignee: Chongqing Vocational Institute of Engineering
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-03-08
Also published as: LU501933B1

Abstract

The invention relates to an electric wrench capable of being adjusted in a self-adaptive mode. The clamping adjusting assembly comprises a plurality of clamping jacking blocks which are uniformly distributed on the inner side of the fixed sleeve and a plurality of transmission assemblies which are arranged in one-to-one correspondence with the clamping jacking blocks. The transmission assembly comprises a universal coupling unit, a transmission rod, a first transmission gear and a second transmission gear, wherein the first transmission gear and the second transmission gear are sequentially sleeved on the transmission rod. One end of the universal coupling unit is connected with the clamping ejector block, and the other end of the universal coupling unit is connected with the transmission rod. The driving assembly comprises a motor, a main shaft connected with an output shaft of the motor, and a first driving gear, a transmission part and a second driving gear which are sequentially sleeved on the main shaft. This electric spanner can twist the operation to the bolt or the nut of various models, and need not to change fixed cover in the operation process, and easy operation is convenient, and application scope is wide.

Description

Electric wrench capable of being adjusted in self-adaptive mode

Technical Field

The invention relates to the technical field of electric wrenches, in particular to an electric wrench capable of being adjusted in a self-adaptive mode.

Background

The electric wrench is an electric tool for screwing and unscrewing a bolt and a nut, and plays an important role in the initial screwing and final screwing processes of a large-hexagon-head high-strength bolt construction and a torsional shear type high-strength bolt. In addition, the electric wrench is also suitable for the occasions with strict requirements on the torque or the axial force of the bolt fastener. The existing electric wrench can only screw and unscrew a bolt and a nut of a certain size, and the application range is narrow. Although some electric spanners are fixed through setting up detachable bolt or nut, when screwing the operation to the bolt and the nut of different models, need change fixed cover, it is very troublesome to operate like this, and accessories is more moreover, and difficult storage is lost easily.

Disclosure of Invention

The invention aims to provide an electric wrench capable of being adjusted in a self-adaptive mode, which can be used for screwing bolts or nuts of various types, does not need to replace a fixed sleeve in the operation process, and is simple and convenient to operate and wide in application range.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electric wrench capable of self-adaptive adjustment comprises a fixed sleeve, a clamping adjusting assembly and a driving assembly. The clamping adjusting assembly comprises a plurality of clamping jacking blocks which are uniformly distributed on the inner side of the fixed sleeve and a plurality of transmission assemblies which are arranged in one-to-one correspondence with the clamping jacking blocks; the transmission assembly comprises a universal coupling unit, a transmission rod, a first transmission gear and a second transmission gear, wherein the first transmission gear and the second transmission gear are sequentially sleeved on the transmission rod; one end of the universal coupling unit is connected with the clamping ejector block, and the other end of the universal coupling unit is connected with the transmission rod. The driving assembly comprises a motor, a main shaft connected with an output shaft of the motor, and a first driving gear, a transmission part and a second driving gear which are sequentially sleeved on the main shaft.

When the motor rotates in the direction + A, the transmission piece moves in the direction + B along the axial direction of the main shaft, when the transmission piece moves to be connected with the driving gear in a clamping mode, the main shaft drives the driving gear I and the transmission piece to rotate together, the driving gear I drives the transmission gear I connected with the driving gear I in a meshed mode to rotate, the transmission gear drives the transmission rod connected with the driving gear I in a meshed mode to move in the direction + B, and therefore all the clamping jacking blocks move inwards. When the motor rotates towards the-A direction, the transmission piece moves towards the-B direction along the axial direction of the main shaft, when the transmission piece moves to be connected with the second driving gear in a clamping mode, the main shaft drives the second driving gear and the transmission piece to rotate together, the second driving gear drives the second transmission gear connected with the second driving gear in a meshing mode to rotate, and the second transmission gear drives the transmission rod matched with the second transmission gear in a threaded mode to move along the-B direction, so that the clamping blocks move outwards.

Further, the universal coupling unit includes two universal couplings, is universal coupling one and universal coupling two respectively, and the one end of universal coupling one is passed through the connecting rod and is pressed from both sides tight kicking block and link to each other, and the connecting rod runs through and installs on the lateral wall of fixed cover, and the one end of connecting rod links to each other with pressing from both sides tight kicking block, and the other end links to each other with universal coupling one, and the other end of universal coupling one links to each other with the one end of universal coupling two, and the other end of universal coupling two links to each other with the one end of transfer line. The side wall of the fixed sleeve is provided with a threaded hole, and the connecting rod is provided with external threads.

Furthermore, the number of the clamping top blocks and the number of the transmission assemblies are 3.

Furthermore, an idler wheel is arranged between the first transmission gear and the first driving gear, and the idler wheel is meshed and connected with the first transmission gear and the first driving gear respectively.

Furthermore, the middle section of the main shaft is provided with external threads, the inner wall of the transmission part is provided with internal threads, and the transmission part is in threaded fit with the main shaft; the first driving gear and the second driving gear are in clearance fit with the main shaft.

Further, the transmission part comprises a first connecting part and a second connecting part which are sequentially arranged, a first bulge is arranged on the first connecting part, and a plurality of second bulges are arranged on the second connecting part; the driving gear I is provided with a first groove which is arranged corresponding to the first protrusion, and the driving gear II is provided with a second groove which is arranged corresponding to the second protrusion.

Furthermore, a first bulge mounting groove is formed in the first connecting part, one end of the first bulge extends into the first bulge mounting groove, and a first spring is connected between the first bulge mounting groove and the bottom of the first bulge mounting groove; and a second protruding mounting groove is formed in the second connecting part, one end of the second protruding mounting groove extends into the second protruding mounting groove, and a second spring is connected between the second protruding mounting groove and the bottom of the second protruding mounting groove.

Furthermore, a fixed shell is arranged on one side of the fixed sleeve; the fixed shell comprises a shell and a bracket arranged at an opening at one end of the shell; the fixed sleeve is arranged on the bracket.

Compared with the prior art, the invention has the advantages that:

(1) according to the invention, the distance between the clamping top blocks and the central line can be adjusted according to actual needs by arranging the clamping top blocks capable of moving along the radial direction of the fixed sleeve, so that the head of the bolt or the nut is clamped by each clamping top block. The invention can be used for screwing bolts or nuts of various types, does not need to replace the fixed sleeve in the operation process, and has simple and convenient operation and wide application range.

(2) According to the invention, the two universal couplings are adopted to connect the clamping top block and the transmission rod, so that the linear movement of the transmission rod can be transmitted to the clamping top block through the two universal couplings, and the clamping top block can move inwards or outwards along the radial direction of the fixed sleeve. When the transmission rod pushes the universal coupling to move towards the direction close to the clamping ejector blocks, acting force of the transmission rod on the universal coupling unit can be transmitted to the clamping ejector blocks, so that the clamping ejector blocks move inwards, the space enclosed by the clamping ejector blocks is reduced, and the universal coupling is suitable for large-size bolts or nuts. When the transmission rod pulls the universal coupling to move in the direction far away from the clamping ejector blocks, the acting force of the transmission rod on the universal coupling unit can be transmitted to the clamping ejector blocks, so that the clamping ejector blocks move outwards, the space surrounded by the clamping ejector blocks is enlarged, and the universal coupling is suitable for large-size bolts or nuts. The universal coupling unit is ingenious in design, the direction of acting force can be changed, and the linear movement of the transmission rod is transmitted to the clamping ejector block and then becomes the radial movement of the clamping ejector block.

(3) The transmission piece which can be connected with different driving gears in a clamping way at different positions is arranged, so that two actions of clamping and releasing of each clamping top block can be realized only by driving one motor. And the motor can also drive the fixed shell, the fixed sleeve and each device connected with the fixed sleeve to rotate after the distance between the clamping jacking blocks is adjusted to a proper size, so as to screw the bolt or the nut. The invention realizes a plurality of functions by using fewer components, reduces the cost and increases the reliability of the operation of the wrench.

Drawings

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

FIG. 2 is a second structural schematic of the present invention (with the motor and a portion of the housing removed);

FIG. 3 is a third schematic structural view of the present invention (with the motor and stationary housing removed);

FIG. 4 is a schematic view of an assembly structure of a first driving gear, a second driving gear, a main shaft, a first transmission gear, a second transmission gear, an idler and a transmission member;

FIG. 5 is a schematic view of the assembled structure of the clamping top block, the universal joint unit and the transmission rod;

FIG. 6 is a schematic view of the construction of the transmission member;

fig. 7 is a schematic structural view of an overload transmission assembly.

Wherein:

100. fixing a sleeve; 201. the clamping top block 202, the first universal couplings 203, the second universal couplings 204, the transmission rods 205, the first transmission gears 206, the second transmission gears 207 and the idle gears; 301. the motor comprises a motor 302, a main shaft 303, a first driving gear 304, a transmission piece 305, a first connecting part 306, a second connecting part 307, a first bulge 308, a second bulge 309, a second driving gear 310 and a first spring; 401. housing, 402, support.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example one

An adaptive adjustable power wrench, as shown in fig. 1-5, includes a holster 100, a clamp adjustment assembly, and a drive assembly. The clamping adjusting assembly comprises a plurality of clamping jacking blocks 201 which are uniformly distributed on the inner side of the fixed sleeve 100 and a plurality of transmission assemblies which are arranged in one-to-one correspondence with the clamping jacking blocks 201. The transmission assembly comprises a universal coupling unit, a transmission rod 204, a first transmission gear 205 and a second transmission gear 206 which are sequentially sleeved on the transmission rod 204; one end of the universal coupling unit is connected with the clamping top block 201, and the other end of the universal coupling unit is connected with the transmission rod 204. The driving assembly comprises a motor 301, a main shaft 302 connected with an output shaft of the motor 301, a first driving gear 303, a transmission member 304 and a second driving gear 309, wherein the first driving gear 303, the transmission member 304 and the second driving gear 309 are sequentially sleeved on the main shaft 302. According to the invention, the distance between the clamping top blocks and the central line can be adjusted according to actual needs by arranging the clamping top blocks capable of moving along the radial direction of the fixed sleeve, so that the head of the bolt or the nut is clamped by each clamping top block. The invention can be used for screwing bolts or nuts of various types, does not need to replace the fixed sleeve in the operation process, and has simple and convenient operation and wide application range.

Further, the universal joint unit includes two universal joints, is universal joint one 202 and two 203 of universal joint respectively, and the one end of universal joint one 202 is passed through the connecting rod and is pressed from both sides tight kicking block 201 and link to each other, and the connecting rod runs through to be installed on the lateral wall of fixed cover 100, and the one end of connecting rod links to each other with pressing from both sides tight kicking block 201, and the other end links to each other with universal joint one 202, and the other end of universal joint one 202 links to each other with the one end of two 203 of universal joint, and the other end of two 203 of universal joint links to each other with the one end of transfer line 204. The side wall of the fixing sleeve 100 is provided with a threaded hole, and the connecting rod is provided with external threads. The quantity of screw hole equals with the quantity of connecting rod, and the one-to-one setting. According to the invention, the two universal couplings are adopted to connect the clamping top block and the transmission rod, so that the linear movement of the transmission rod can be transmitted to the clamping top block through the two universal couplings, and the clamping top block can move inwards or outwards along the radial direction of the fixed sleeve. When the transfer line promoted universal joint forward rotation, rotatory universal joint can drive the connecting rod and rotate in the screw hole to the connecting rod that makes to be connected with each universal joint rotates in the screw hole that corresponds, drives and presss from both sides tight kicking block and moves along the radial inboard of fixed cover, makes the space that each presss from both sides tight kicking block and encloses diminish, is adapted to small-size bolt or nut. When the transmission rod drives the universal coupling to rotate reversely, the rotating universal coupling can drive the connecting rod to rotate reversely in the threaded hole, so that the connecting rod connected with each universal coupling rotates reversely in the corresponding threaded hole, the clamping ejector blocks are driven to move outwards along the radial direction of the fixed sleeve, the space surrounded by each clamping ejector block is enlarged, and the universal coupling is suitable for large-size bolts or nuts. The forward and reverse directions are relative to each other and are intended to illustrate two opposite movements. The design of universal joint unit is very ingenious, can change the direction of action, changes the rectilinear movement of transfer line into rotating, and rethread screw-thread fit's connecting rod and fixed cover become the rectilinear movement of connecting rod with universal joint's rotation, transmit to press from both sides tight kicking block after, just become the radial movement who presss from both sides tight kicking block.

Further, the number of the clamping top blocks 201 and the number of the transmission assemblies are 3. Through setting up three tight kicking blocks of clamp, be applicable to more common hexagon nut or hexagon bolt, can exert the effort uniformly to hexagon bolt's head or hexagon nut.

Further, an external thread is arranged at the middle section of the main shaft 302, an internal thread is arranged on the inner wall of the transmission part, and the transmission part is in threaded fit with the main shaft; the first driving gear and the second driving gear are in clearance fit with the main shaft.

Further, as shown in fig. 6, the transmission member 304 includes a first connection portion 305 and a second connection portion 306, which are sequentially disposed, the first connection portion 305 is provided with a first protrusion 307, and the second connection portion 306 is provided with a plurality of second protrusions 308; the first driving gear 303 is provided with a first groove corresponding to the first protrusion 307, and the second driving gear 309 is provided with a second groove corresponding to the second protrusion 308. The transmission piece which can be connected with different driving gears in a clamping way at different positions is arranged, so that two actions of clamping and releasing of each clamping top block can be realized only by driving one motor. And a plurality of functions are realized by using fewer parts, the cost is reduced, and the running reliability of the wrench is improved.

Furthermore, the protrusion, the groove and the spring form an overload transmission assembly, the overload transmission assembly plays a role in connecting the transmission gear and the transmission piece on one hand, so that the transmission piece can drive the transmission gear to rotate, and on the other hand, after the clamping top block reaches a proper position, the overload force received by the continuous rotating transmission piece can be transmitted to the spring, so that the protrusion is separated from the groove. As shown in fig. 7, a first bump mounting groove is formed on the first connecting portion 305, one end of the first bump 307 extends into the first bump mounting groove, and a first spring 310 is connected between the first spring and the bottom of the first bump mounting groove; and a second protruding mounting groove is formed in the second connecting part 306, one end of the second protruding 308 extends into the second protruding mounting groove, and a second spring is connected between the second protruding mounting groove and the bottom of the second protruding mounting groove. The first bulge and the second bulge adopt hemispherical structures. The first groove and the second groove both comprise a plurality of groove parts which are connected in sequence and have different diameters. After the first protrusion (or the second protrusion) enters the first groove (or the second groove), the protrusions are in contact with groove parts with different sizes, and interaction force between the protrusions and the groove parts is different. Through setting up recess one and recess two to the recess position that contains a plurality of unidimensional, on the one hand can be convenient for the arch enter into the recess and be connected with the recess block, on the other hand can also be in the tight kicking block removal to suitable position no longer remove the back, under the effect of overload force, the spring that protruding compression links to each other with it makes the arch follow roll-off in the recess, and the driving medium separates with the driving gear. When the load does not exceed the spring force, the spring presses the protrusion in the groove to complete the transmission. When the load exceeds the spring force, the spring contracts, causing the transmission to cancel. The overload matching mode of the protrusion, the groove and the spring can adopt the traditional scheme in the prior art, such as a safety clutch, and also can adopt the mode.

Further, a fixing housing is disposed at one side of the fixing sleeve 100; the fixed shell comprises a shell 401 and a bracket 402 arranged at an opening at one end of the shell 401; the harness 100 is mounted on a support 401. The main shaft is connected with the motor, and the motor is also connected with the bracket. When the motor rotates, the motor can drive the fixed shell, the bracket, the fixed sleeve and each part fixedly connected with the fixed sleeve to rotate, and can also drive the main shaft to rotate.

The working principle of the invention is as follows:

when the motor rotates along the direction + A, the transmission part moves along the axial direction + B of the main shaft. If the transmission member is connected with the second driving gear before, when the motor rotates along the direction + A, the second protrusion of the transmission member can be separated from the second groove, and the transmission member moves along the axial direction + B of the main shaft. When the transmission part moves to be connected with the first driving gear in a clamping mode (in the process that the transmission part moves upwards, the first protrusion extends into the first groove and is connected with the first groove in a clamping mode), the main shaft drives the first driving gear and the transmission part to rotate together, the first driving gear drives the first transmission gear connected with the first driving gear in a meshing mode to rotate, the transmission gear drives the transmission rod connected with the first transmission gear in a meshing mode to move along the direction + B, the transmission rod drives the universal coupling to rotate, the universal coupling drives the connecting rod to rotate, the connecting rod drives the clamping jacking blocks to move inwards along the radial direction of the fixing sleeve, and therefore the clamping jacking blocks move inwards, the space surrounded by the clamping jacking blocks is reduced, and the operation of reducing the opening size or clamping is achieved.

When the motor rotates along the direction-A, the transmission piece moves along the axial direction of the main shaft to the direction-B. If the driving member is connected with the driving gear before, when the motor rotates along the direction-A, the protrusion of the driving member will be separated from the groove, and the driving member moves along the axial direction of the main shaft to the direction-B. When the transmission part moves to be connected with the second driving gear in a clamping manner, the main shaft drives the second driving gear and the transmission part to rotate together, the second driving gear drives the second transmission gear which is meshed with the second driving gear to rotate, the second transmission gear drives the transmission rod which is in threaded fit with the second transmission gear to move along the direction-B, the transmission rod drives the universal coupling to rotate, the universal coupling drives the connecting rod to rotate, and the connecting rod drives the clamping jacking blocks to move outwards along the radial direction of the fixed sleeve, so that the clamping blocks all move outwards, and the space surrounded by the clamping jacking blocks is enlarged, and the opening size is enlarged or loosened. In the embodiment, the rotating direction of the first transmission gear and the rotating direction of the second transmission gear are opposite to each other by changing the rotating direction of the motor. Let the direction + A be the clockwise rotation of the motor and the direction-A be the counterclockwise rotation of the motor. The direction + B is the upward movement of the drive member as described in the description of fig. 3. The direction-B is the downward movement of the transmission member in the description of FIG. 3. When the clamping top blocks move inwards along the radial direction of the fixed sleeve, if the clamping top blocks clamp the bolts or the nuts positioned between the clamping top blocks, the main shaft drives the transmission part to rotate, an overload force can be applied to the protrusions, the overload force can compress the first spring to separate the protrusions from the first groove, the transmission part does not drive the first driving gear to rotate any more, and at the moment, the motor can drive the fixed shell to rotate with the fixed sleeve to twist the nuts or the bolts. Similarly, when pressing from both sides tight kicking block and radially outwards moving along fixed cover, if each presss from both sides tight kicking block and has tightly pressed from both sides the bolt or the nut that lie in between each tight kicking block, so, the main shaft is driving the driving medium and is rotating, can apply for two overload force protruding, this overload force can compress spring two, makes two protruding and two recess separate, and the driving medium no longer drives two rotations of driving gears, and at this moment, the motor still can drive fixed casing and fixed cover rotation, carries out the operation of twisting of nut or bolt.

Example two

An idler wheel is arranged between the first transmission gear and the first driving gear, and the idler wheel is meshed with the first transmission gear and the first driving gear respectively. In this embodiment, the motor always rotates in the same direction. The idler wheel is arranged between the first transmission gear and the first driving gear, so that the rotation direction of the first transmission gear can be opposite to that of the second transmission gear. The first transmission gears and the idler gears are equal in number and are arranged in a one-to-one correspondence mode.

The other steps are the same as those of the first embodiment.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. The utility model provides an electric spanner that can self-adaptation regulation which characterized in that: comprises a fixed sleeve, a clamping adjusting component and a driving component;

the clamping adjusting assembly comprises a plurality of clamping jacking blocks which are uniformly distributed on the inner side of the fixed sleeve and a plurality of transmission assemblies which are arranged in one-to-one correspondence with the clamping jacking blocks; the transmission assembly comprises a universal coupling unit, a transmission rod, a first transmission gear and a second transmission gear, wherein the first transmission gear and the second transmission gear are sequentially sleeved on the transmission rod; one end of the universal coupling unit is connected with the clamping jacking block, and the other end of the universal coupling unit is connected with the transmission rod;

the driving assembly comprises a motor, a main shaft connected with an output shaft of the motor, and a first driving gear, a transmission part and a second driving gear which are sequentially sleeved on the main shaft;

when the motor rotates in the direction + A, the transmission piece moves in the direction + B along the axial direction of the main shaft, when the transmission piece moves to be connected with the driving gear in a clamping mode, the main shaft drives the driving gear I and the transmission piece to rotate together, the driving gear I drives the transmission gear I connected with the driving gear I in a meshing mode to rotate, and the transmission gear drives the transmission rod connected with the transmission gear I in a meshing mode to move in the direction + B, so that the clamping jacking blocks move inwards; when the motor rotates towards the-A direction, the transmission piece moves towards the-B direction along the axial direction of the main shaft, when the transmission piece moves to be connected with the second driving gear in a clamping mode, the main shaft drives the second driving gear and the transmission piece to rotate together, the second driving gear drives the second transmission gear connected with the second driving gear in a meshing mode to rotate, and the second transmission gear drives the transmission rod matched with the second transmission gear in a threaded mode to move along the-B direction, so that the clamping blocks move outwards.

2. An adaptively adjustable electric wrench as claimed in claim 1, wherein: the universal coupling unit comprises two universal couplings, namely a universal coupling I and a universal coupling II, one end of the universal coupling I is connected with the clamping top block through a connecting rod, the connecting rod is installed on the side wall of the fixing sleeve in a penetrating mode, one end of the connecting rod is connected with the clamping top block, the other end of the connecting rod is connected with the universal coupling I, the other end of the universal coupling I is connected with one end of the universal coupling II, the other end of the universal coupling II is connected with one end of the transmission rod, a threaded hole is formed in the side wall of the fixing sleeve, and external threads are formed in the connecting rod.

3. An adaptively adjustable electric wrench as claimed in claim 1, wherein: the number of the clamping top blocks and the number of the transmission assemblies are 3.

4. An adaptively adjustable electric wrench as claimed in claim 1, wherein: an idler wheel is arranged between the first transmission gear and the first driving gear, and the idler wheel is meshed with the first transmission gear and the first driving gear respectively.

5. An adaptively adjustable electric wrench as claimed in claim 1, wherein: the middle section of the main shaft is provided with external threads, the inner wall of the transmission part is provided with internal threads, and the transmission part is in threaded fit with the main shaft; the first driving gear and the second driving gear are in clearance fit with the main shaft.

6. An adaptively adjustable electric wrench as claimed in claim 1, wherein: the transmission part comprises a first connecting part and a second connecting part which are sequentially arranged, wherein the first connecting part is provided with a first bulge, and the second connecting part is provided with a plurality of second bulges; the driving gear I is provided with a first groove which is arranged corresponding to the first protrusion, and the driving gear II is provided with a second groove which is arranged corresponding to the second protrusion.

7. An adaptively adjustable power wrench as claimed in claim 6, wherein: a first bulge mounting groove is formed in the first connecting part, one end of the first bulge extends into the first bulge mounting groove, and a first spring is connected between the first bulge mounting groove and the bottom of the first bulge mounting groove; and a second protruding mounting groove is formed in the second connecting part, one end of the second protruding mounting groove extends into the second protruding mounting groove, and a second spring is connected between the second protruding mounting groove and the bottom of the second protruding mounting groove.

8. An adaptively adjustable electric wrench as claimed in claim 1, wherein: one side of the fixed sleeve is provided with a fixed shell; the fixed shell comprises a shell and a bracket arranged at an opening at one end of the shell; the fixed sleeve is arranged on the bracket.