WO2019095163A1 - Wrench - Google Patents

Abstract

A wrench, comprising a wrench body (100), a sleeve hole (200), a clamping device (300), and a clamping hole (3). The sleeve hole passes through or is recessed in the surface of the wrench body. The clamping device is provided in the sleeve hole. The clamping hole is provided in the middle of the clamping device. The aperture size of the clamping hole is adjustable. If a clamped object (400) is slightly different from a clamping portion in size, the inside diameter of the clamping hole of the wrench can be automatically adjusted to eliminate a gap between the wrench and a bolt or a nut, so that the clamping surface of the wrench fits well with the surface of the bolt or the nut. Therefore, slippage is effectively avoided and hand feel of users is improved.

Description

 Wrench

Technical field

The present invention relates to a hand tool, and more particularly to a wrench.

Background technique

A wrench is a commonly used mounting and dismounting tool. It is a hand tool that uses a lever principle to twist a threaded part such as a bolt, a screw, or a nut. The wrench usually has an opening or a sleeve hole for clamping the threaded member at one or both ends of the shank, and an external force is applied to the shank in the direction of the rotation of the thread during use, so that the threaded member can be screwed.

A wrench with a hole in one end or both ends of the handle is generally called a socket wrench, and the cross section of the sleeve hole is designed to have different shapes to be applied to bolts or nuts of various shapes, such as a hexagonal wrench. However, the size of the wrench, bolt or nut may produce certain tolerances during production. In use, there will be a certain gap between the wrench and the surface of the bolt or nut, which results in poor fit of the clamping surface, easy slippage, and affects operation. The feel of the process. When the user rotates the accessory, the looseness of the accessory may not be detected and dealt with in the shortest time. It is easy to cause the nut and other accessories to be loosened and then dropped. It is very troublesome to find a small-sized nut in some narrow spaces. On the other hand, some existing nuts and other fittings have a size specification that is mixed with the metric system. This will cause the wrench sleeve hole to be mismatched with the bolt specifications, and it is difficult for the naked eye to accurately estimate the difference in size between the two. It is prone to mismatch between the wrench and the nut, causing damage to the surface of the nut and other accessories. In addition, bolts, nuts and other accessories are exposed to the air, which may cause corrosion, rust, etc., which makes the size of the fittings smaller, and also causes the size of the wrench sleeve to be mismatched with the dimensions of bolts, nuts and other fittings.

Those skilled in the art are working on the development of a new wrench whose inner diameter of the sleeve or the clamping portion can be finely adjusted, and the size of the clamped object (such as a bolt or nut) and the inner diameter of the clamping portion are slightly smaller. In the case, the clamping portion can automatically adjust the inner diameter to adapt to the size of the object to be clamped, so as to eliminate the gap between the wrench and the bolt or the nut, so that the clamping surface of the wrench fits well with the surface of the bolt or nut, effectively preventing Slip to enhance the user's feel.

Summary of the invention

The object of the present invention is to provide a wrench to solve the problem that the gap between the wrench clamping portion and the object to be clamped in the prior art socket wrench is large, the clamping surface is poorly attached, the slippage is easy, the operation is inconvenient, and the like. technical problem.

In order to solve the above technical problem, the present invention provides a wrench including a wrench body, a sleeve hole, a clamping device, and a clamping hole, the sleeve hole penetrating or recessed on the surface of the trigger body; The clamping hole is disposed in a middle portion of the clamping device; the aperture size of the clamping hole is adjustable.

The clamping device includes two or more clamping blocks disposed opposite to each other and surrounding the clamping hole; wherein the inner hole wall of the clamping hole comprises sidewalls of the two or more clamping blocks; The distance between the above clamps is adjustable.

Further, in various embodiments, a clip includes a clamping block that is part of the cylinder; a clamping opening that extends through the top and bottom of the clamping block, the opening direction of which faces the other clamping block; Holding the face, which is the inner side wall of the gripping opening.

Further, in various embodiments, the clamping device further includes a first recess recessed in the inner side wall of the sleeve hole, and a second recess recessed on an outer side wall of the clip; a recess is disposed opposite to each other; and a first elastic member that is snapped into the first recess and the second recess; wherein the first recess, the second recess, and the first elasticity The shape of the piece is part of the ring.

Further, in various embodiments, the wrench further includes a clip mounting groove recessed in the inner side wall of the sleeve hole, and at least one clip is mounted to the clip mounting groove.

Further, in various embodiments, the clamping device further includes a bracket mounted into the sleeve hole; at least one clip is movably mounted to the bracket.

Further, in various embodiments, the bracket includes a columnar frame that is engaged to the sleeve hole; a frame through hole that penetrates the top and bottom of the columnar frame; and two or more mounting holes that respectively penetrate through The side wall of the columnar frame is connected to the through hole of the frame; wherein each of the mounting holes is movably or fixedly mounted with a clamping block, and the inner side wall of the through hole of the frame is more than two The clamping surface of the clamping block encloses the clamping hole.

Further, in different embodiments, the outer side wall of the column frame is tangential to the inner side wall of the sleeve hole; the top end and the bottom end of the outer side wall of the column frame are respectively provided with a protruding flange; two flanges Engaged on the surface on both sides of the trigger.

Further, in various embodiments, the wrench further includes a ratchet ring rotatably mounted into the sleeve hole and sleeved outside the clamping device.

Further, in various embodiments, the clamping device further includes a first recess recessed in the inner side wall of the ratchet ring; the second recess is recessed on an outer side wall of the clip; and a recess is disposed opposite to each other; and a first elastic member that is snapped into the first recess and the second recess; wherein the first recess, the second recess, and the first elasticity The shape of the piece is part of the ring.

Further, in various embodiments, the wrench further includes a clip mounting groove recessed in the inner side wall of the ratchet ring, and at least one clip is mounted to the clip mounting groove.

Further, in different embodiments, at least one clip is movably mounted into the clip mounting slot; the clip includes a first positioning slot, and the recess is recessed toward the clip mounting slot a surface of the bottom side; and a second elastic member disposed in the first positioning groove, one end of which is tangent to the bottom of the first positioning groove, and the other end of which is tangent to the bottom of the clamping piece groove.

Further, in different embodiments, at least one clamping block is installed into the clamping block mounting groove; the clamping block includes a second positioning groove, and is recessed on a surface of the clamping block toward one side of the other clamping block; a positioning ball is disposed at the notch of the second positioning groove, and a third elastic member is disposed in the second positioning groove, one end of which is tangential or connected to the bottom of the second positioning groove, and the other end thereof Connected to the positioning ball; a portion of the surface of the positioning ball and a clamping surface of two or more clamping blocks enclose the clamping hole.

Further, in various embodiments, the clamping device further includes a bracket mounted to the ratchet ring; at least one clip is movably mounted to the bracket.

Further, in various embodiments, the bracket includes a columnar frame that is engaged to the inner side of the ratchet ring; a frame through hole that penetrates the top and bottom of the columnar frame; and two or more mounting holes, respectively A penetrating through the side wall of the columnar frame and communicating with the through hole of the frame; wherein each of the mounting holes is movably or fixedly mounted with a clamping block, the inner side wall of the through hole of the frame body and two The clamping surface of the above clamping block encloses the clamping hole.

Further, in different embodiments, the outer side wall of the column frame is tangent to the inner side wall of the ratchet ring; the top end and the bottom end of the outer side wall of the column frame are respectively provided with a protruding flange; two flanges Engaged on the surface on both sides of the ratchet ring.

Further, in various embodiments, the wrench further includes a sleeve hole recessed in an inner side wall of the sleeve hole; a pawl disposed in the sleeve hole groove and engaged with the ratchet ring And a fourth elastic member disposed in the sleeve hole, one end of which is connected to the bottom or inner wall of the sleeve hole, and the other end of which is connected to the pawl.

Further, in various embodiments, the ratchet ring includes a driving portion disposed inside the ratchet ring and fixed to an outer side of the clamping device, and an annular tooth disposed outside the ratchet ring; The pawl includes a ratchet block, one side of which is tangential to the side wall of the sleeve recess; a ratchet disposed on the other side of the ratchet block and engaging the annular tooth; and elastic a mounting slot is disposed on the bottom surface of the pawl for mounting the fourth elastic member; wherein the fourth elastic member is connected at one end to the bottom or inner wall of the sleeve hole, and the other end is connected to the pawl.

Further, in different embodiments, the clamping hole has a cross section of a waist, a triangle, a rectangle, a hexagon or an octagon.

Further, in different embodiments, the bracket is made of a hard plastic.

The utility model has the beneficial effects of providing a wrench, wherein the inner diameter of the clamping portion can be finely adjusted, and the clamping portion can automatically adjust the inner diameter dimension when the size of the clamped object and the clamping portion are smaller. In order to eliminate the gap between the wrench and the bolt or the nut, the clamping surface of the wrench is well fitted to the surface of the bolt or the nut, thereby effectively preventing slippage and enhancing the user's hand. Further, according to the present invention, the object to be gripped which is loosened after being screwed can be fixed to the nip portion without being easily dropped, so that work efficiency can be effectively improved.

DRAWINGS

1 is a schematic view showing the overall structure of Embodiment 1 of the present invention;

Figure 2 is a schematic exploded view showing the holding device of the first embodiment of the present invention;

3 is a schematic structural view of a wrench removing end clamping device in Embodiment 1 of the present invention;

Figure 4 is a schematic cross-sectional structural view showing one end of a holding device in Embodiment 1 of the present invention;

Figure 5 is a longitudinal sectional structural view showing one end of a holding device in Embodiment 1 of the present invention;

Figure 6 is another schematic cross-sectional structural view showing one end of the clamping device provided in Embodiment 1 of the present invention;

Figure 7 is a schematic cross-sectional structural view showing one end of a clamping device provided in Embodiment 2 of the present invention;

Figure 8 is a schematic structural view of a bracket in Embodiment 2 of the present invention;

Figure 9 is a longitudinal sectional structural view showing one end of a holding device in Embodiment 2 of the present invention;

Figure 10 is a schematic cross-sectional structural view showing one end of a clamping device provided in Embodiment 3 of the present invention;

Figure 11 is a schematic cross-sectional structural view showing one end of a holding device in Embodiment 4 of the present invention.

The parts in the figure are identified as follows:

100 puller, 200 sets of holes, 300 clamping device, 400 clamped;

1 first clamping block, 2 second clamping block, 3 clamping holes, 4 brackets;

11 first clamping block, 12 first clamping opening, 13 first clamping surface;

21 second clamping block, 22 second clamping opening, 23 second clamping surface;

24 first positioning groove, 25 second elastic member, 26 second positioning groove, 27 positioning ball;

28 third elastic member, 29 third positioning groove, 30 fifth elastic member;

31 first groove, 32 second groove, 33 first elastic member, 34 clamp mounting groove, 35 sets of hole groove;

41 columnar frame body, 42 body through holes, 43 first mounting holes, 44 second mounting holes, 45 bayonet ports;

51 ratchet ring, 52 pawl, 53 fourth elastic member, 54 ratchet ring groove;

411 flange, 412 flange; 521 ratchet block, 522 ratchet, 523 elastic member mounting groove.

Detailed ways

The preferred embodiments of the present invention are fully described in the following description with reference to the accompanying drawings, in which The invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments disclosed herein.

The directional terms mentioned in the present invention, for example, upper, lower, front, rear, left, right, inner, outer, side, top, bottom, top, bottom, end, etc., are only directions in the drawings, but The invention is to be construed as illustrative and not to limit the scope of the invention.

When a component is described as being "on" another component, the component can be placed directly on the other component; an intermediate component can also be present, the component being placed on the intermediate component, And the intermediate part is placed on another part. When a component is described as "mounted to" or "connected to" another component, both can be understood as direct "installation." Or "connected", or a component is "mounted" or "connected" to another component indirectly through an intermediate component.

Example 1

As shown in FIG. 1 , the embodiment provides a wrench including a trigger body 100 , a sleeve hole 200 , and a clamping device 300 . The sleeve hole 200 extends through one end of the trigger body 100 or is recessed on a surface of the trigger body 100 . The clamping device 300 is fixed to or rotatably mounted within the sleeve hole 200.

As shown in FIGS. 1 to 2, the clamping device 300 includes a first clamping block 1, a second clamping block 2, and a clamping hole 3 which are disposed opposite each other. The first clamping block 1 and the second clamping block 2 are movably mounted into the sleeve hole 200, and the distance between the first clamping block 1 and the second clamping block 2 is adjustable. The clamping hole 3 is disposed in the middle of the clamping device 300, and the clamping hole 3 is sleeved outside the clamped object 400. The clamped object 400 is preferably a bolt or a nut.

The first clamping block 1 includes a first clamping block body 11, a first clamping opening 12 and a first clamping surface 13. The first clamping block 11 is a part of a cylinder; the first clamping opening 12 penetrates from the top of the first clamping block 11 to the bottom thereof, and the opening direction of the first clamping opening 12 faces the second clamping block 2; A clamping surface 13 is the inner side wall of the first clamping opening 12.

The second clamping block 2 includes a second clamping block 21, a second clamping opening 22 and a second clamping surface 23. The second clamping block 11 is a part of a cylinder; the second clamping opening 22 extends from the top of the second clamping block 21 to the bottom thereof, and the opening direction of the second clamping opening 22 faces the first clamping block 1; The clamping surface 23 is the inner side wall of the second clamping opening 22.

In this embodiment, the two clamping blocks 1, 2 can enclose a complete circular cylinder. Preferably, the first clamping block 1 is a three-quarter ring cylinder, and the second clamping block 2 is a quarter. A ring cylinder.

The clamping hole 3 is formed between the two clamping blocks 1, 2, specifically, the clamping hole 3 is a hexagonal hole surrounded by the first clamping surface 13 and the second clamping surface 23, and is clamped The shape of the holder 400 (such as a bolt or a nut) is adapted to define the inner side of the clamping hole 3 to effectively clamp the inner diameter of the object to be clamped 400 as the clamping width. In the embodiment, in the direction of the central axis (central symmetry axis) of the first clamping block 1 and the second clamping block 2, the distance between the first clamping block 1 and the second clamping block 2 is the clamping hole 3 The clamping width of the clamping hole 3 in the direction of the central axis of the first clamping block 1 and the second clamping block 2 is the clamping width of the clamping hole 3. Since the distance between the first clamping block 1 and the second clamping block 2 is adjustable, the aperture size of the clamping hole 3 is adjustable, and the clamping width of the clamping hole 3 is adjustable.

As shown in FIGS. 2 to 3, the clamping device 300 further includes a first groove 31, a second groove 32, and a first elastic member 33. The first groove 31 is recessed in the inner side wall of the sleeve hole 200; the second groove 32 is recessed on the outer side wall of the first clamping block 1; the second groove 32 is disposed opposite to the first groove 31, the first groove 31, The second groove 32 has a cross section that is a portion of the ring, preferably about three quarters of the ring. The first elastic member 33 is preferably a circlip, and is inserted into the first recess 31 and the second recess 32 for connecting the trigger body 100 and the first clamping block 1. The shape of the circlip corresponds to the shape of the first groove 31 and the second groove 32, and the cross section of the circlip is also a part of the ring shape, preferably about three quarters of the ring.

The first elastic member 33 (ie, the circlip) can slide at a small angle in the first groove 31 and the second groove 32, so that the first clamping block 1 can rotate at a small angle with respect to the sleeve hole 200, the first elastic member. The 33 has a certain elasticity so that the first clamp 1 can be fitted into the sleeve hole 200 and the gap between the first clamp 1 and the sleeve 200 is minimized.

As shown in FIG. 2 to FIG. 5, the embodiment further includes a clamping block mounting groove 34 having a crescent shape in cross section, recessed on the inner side wall of the sleeve hole 200, and the second clamping block 2 is movably mounted to the clamping block. Inside the slot 34. The second clamping block 2 comprises one or two first positioning grooves 24 and one or two second elastic members 25. The first positioning groove 24 is recessed on the surface of the second clamping block 2 toward the bottom side of the clamping block mounting groove 34; the second clamping surface 23 includes two planes, and the two first positioning grooves 24 respectively correspond to the two planes. The second elastic member 25 is preferably a coil spring disposed in a first positioning groove 24, one end of which is tangential or connected to the bottom of the first positioning groove 24, and the other end of which is tangential or connected to the bottom of the block mounting groove 34.

When the clamping device 300 is idle, the second elastic member 25 is in a relaxed state, and the width of the clamping hole of the clamping device 300 in the idle state is smaller than the width of the clamping hole 3 in its use state.

When the clamping device 300 is used, the clamping hole 3 is sleeved outside the clamped object 400 (such as a bolt or a nut), and the gap between the wrench and the object to be clamped 400 can be eliminated, in the first clamping block 1 and the first Under the action of the two clamping blocks 2, the first clamping surface 13 and the second clamping surface 23 are attached to the outer surface of the clamped object 400 to clamp them, so that the clamping faces 13, 23 of the wrench are attached to the surface of the bolt or nut. Good and effective to prevent slipping.

FIG. 5 is a schematic view showing the working state of the embodiment when the hexagon nut having a large size is clamped. As shown in FIG. 5, when the size of the object to be grasped (such as a bolt or a nut) is too large, the two second elastic members 25 are compressed by force, and the second clamping block 2 is moved toward the bottom surface of the clamping block mounting groove 34. There is a certain gap between the two ends of one clip 1 and the two ends of the second clamp 2. The larger the size of the object to be grasped, the larger the distance that the second clamping block 2 needs to move, and the larger the gap between the two ends of the first clamping block 1 and the two ends of the second clamping block 2 before the rotation; in the limit state, The second clamping block 2 can even abut against the bottom surface of the clamping block mounting groove 34. When the clamped object 400 needs to be loosened or tightened, first, the trigger body 100 rotates clockwise or counterclockwise along the thread direction, and the second clamp block 2 rotates at a small angle with respect to the first clamp block 1, the first clamp One end of the block 1 is attached to one end of the second clamping block 2, and the second clamping block 2 abuts against the bottom surface or the side surface of the clamping block mounting groove 34, and the two clamping blocks are locked by the clamping object 400; then, the trigger body 100 is along the thread The direction is further rotated clockwise or counterclockwise, so that the clamped object 400 (such as a bolt or a nut) is loosened or tightened, and the clamped object 400 is always clamped by the two clamps during the loosening or tightening process. It will not fall easily, which can effectively improve work efficiency.

FIG. 6 is a schematic view showing the working state of the embodiment when the hex nut having a small size is clamped. As shown in FIG. 6, when the size of the object to be held (such as a bolt or a nut) is small, the two ends of the first block 1 are The second clamping block 2 is affixed at both ends, and the second clamping block 2 is moved away from the bottom surface of the clamping block mounting groove 34, and the second clamping block 2 has a large gap with the bottom of the clamping block mounting groove 34. The smaller the size of the object to be grasped, the larger the moving distance of the second holder 2, and the larger the gap between the second holder 2 and the bottom of the holder mounting groove 34. When the clamped object 400 needs to be loosened or tightened, first, the trigger body 100 rotates clockwise or counterclockwise along the thread direction, and the first clamp block 1 and the second clamp block 2 are driven to be small relative to the sleeve hole 200. When the angle is rotated, the end faces of the two ends of the first clamping block 1 and the end faces of the two clamping blocks 2 are relatively slid, so that the second clamping block 2 is placed on the bottom surface or the side surface of the clamping block mounting groove 34, and the first clamping block 1 and the second clamping block 1 The clamp 2 will be locked by the holder 400. The smaller the size of the object to be grasped, the larger the angle at which the second jaw 2 rotates relative to the sleeve hole 200. Then, the trigger body 100 is further rotated clockwise or counterclockwise along the thread direction, so that the clamped object 400 (such as a bolt or a nut) can be loosened or tightened, and during the loosening or tightening process, the clamped object 400 is always The two clamps are clamped and will not fall easily, which can effectively improve work efficiency.

In other embodiments similar to the embodiment, the clamping device 300 may further include three or more clamping blocks, which are also installed into the sleeve hole 200; the clamping holes 3 are formed between the plurality of clamping blocks, and the plurality of clamping blocks are formed. At least one of the clamps is movably mounted to the inner side wall of the sleeve hole 200, and the distance between the plurality of clamp blocks is adjustable; the width of the clamp hole 3 in at least one direction is adjustable. When the trigger 100 is initially rotated along the thread, the plurality of clamps will be locked by the clamp 400; when the trigger 100 is further rotated in the thread direction, the clamped object 400 is tightened or loosened.

In other embodiments similar to the embodiment, the cross-section of the clamping hole 3 may be a waist shape, a triangle shape, a rectangular shape, a hexagon shape, or an octagon shape, and the corresponding objects 400 of different shapes and different specifications are respectively supported ( Such as bolts or nuts).

In other embodiments similar to the present embodiment, as with the second clamp 2, the first clamp 1 can also be movably mounted into a clamp mounting groove 34. Thus, both of the clamps are movable, so that the distance between the two clamps can be adjusted more greatly and the width of the clamped holes can be adjusted.

The beneficial effect of the embodiment is that a wrench is provided, and two movable clamping blocks are arranged in the sleeve hole, so that the width of the clamping hole can be adjusted in a small range. In the case where the size of the clamped object and the clamping portion are small and small, the clamping hole can automatically adjust the inner diameter to eliminate the gap between the wrench and the bolt or the nut, so that the clamping surface of the wrench and the object to be clamped The surface fits well, effectively preventing slippage and enhancing the user's hand. In addition, the present invention can prevent the clamped object that is loosened after being screwed and can be fixed on the nip portion without being easily dropped, thereby effectively improving work efficiency and effectively preventing the clamped object (bolt or nut, etc.) from being Damaged.

Example 2

The technical features of this embodiment are mostly the same as those of the first embodiment, and the distinguishing technical feature is that, in the embodiment 2, the clamping device 300 includes the first clamping block 1 and the second clamping block 2 which are oppositely disposed, and further includes a clamping hole. 3 and bracket 4. The bracket 4 is an annular cylinder that is mounted into the sleeve hole 200, the first clamping block 1 is fixed to the bracket 4, and the second clamping block 2 is movably mounted to the bracket 4, the first clamping block 1 and the second clamping block The distance between 2 is adjustable.

As shown in FIGS. 7-8, the bracket 4 includes a columnar frame 41 and a frame through hole 42. The outer portion of the column frame 41 is a cylinder and is engaged with the sleeve hole 200. The frame through hole 42 extends through the top of the column frame 41. With the bottom, the frame through hole 42 has a hexagonal cross section. The outer side wall of the column frame body 41 is tangential to the inner side wall of the sleeve hole 200; the top end and the bottom end of the outer side wall of the column frame body 41 are respectively provided with a protruding flange 411, 412; the two flanges 411, 412 are engaged with the wrench body 100. On both sides, the bracket 4 is mounted in the sleeve hole 200. The material of the columnar frame 41 is a hard plastic having a certain hardness and toughness.

The outer side wall of the bracket 4 is provided with two bayonet ports 45 opposite to each other, and is disposed opposite to the buckle protruding from the inner side wall of the sleeve hole 200 for fixing the bracket 4 in the sleeve hole 200 so as not to rotate or move.

As shown in FIGS. 8-9, the bracket 4 further includes two mounting holes, that is, a first mounting hole 43 and a second mounting hole 44, respectively penetrating the side wall of the column frame 41 and communicating with the frame through hole 42. The first clamp block 1 is fixed to the mounting hole 43 of the bracket 4, and the second clamp block 2 is movably mounted to the mounting hole 44 of the bracket 4.

The first clamping block 1 and the second clamping block 2 are all V-shaped clamping blocks, and together with the frame through-holes 42 define a clamping hole 3. Specifically, the inner side wall of the frame through hole 42 and the first clamping surface 13 and the second clamping surface 23 enclose a clamping hole 3 which is a hexagonal hole and a clamped object 400 (such as a bolt or a nut). The shape is adapted. The inner side of the clamping hole 3 is defined to effectively clamp the inner diameter of the object to be clamped. In the embodiment, in the direction of the central axis (central symmetry axis) of the first clamping block 1 and the second clamping block 2, the distance between the first clamping block 1 and the second clamping block 2 is the clamping hole 3 The clamping width of the clamping hole 3 in the direction of the central axis of the first clamping block 1 and the second clamping block 2 is the clamping width of the clamping hole 3. Since the distance between the first clamping block 1 and the second clamping block 2 is adjustable, the aperture size of the clamping hole 3 is adjustable, and the clamping width of the clamping hole 3 is adjustable.

The embodiment further includes a clamp mounting groove 34 having a crescent shape in cross section, recessed in the inner side wall of the sleeve hole 200, and the second clamp block 2 being movably mounted into the clamp mounting groove 34. The second clamping block 2 includes two first positioning grooves 24 and two second elastic members 25. The first positioning groove 24 is recessed on the surface of the second clamping block 2 toward the bottom side of the clamping block mounting groove 34; the second clamping surface 23 includes two planes, and the two first positioning grooves 24 respectively correspond to the two planes. The second elastic member 25 is preferably a coil spring disposed in a first positioning groove 24, one end of which is tangential or connected to the bottom of the first positioning groove 24, and the other end of which is tangential or connected to the bottom of the block mounting groove 34.

When the clamping device 300 is idle, the second elastic member 25 is in a relaxed state, and the width of the clamping hole of the clamping device 300 in the idle state is smaller than the width of the clamping hole 3 in its use state.

When the clamping device 300 is in use, the clamping hole 3 is sleeved outside the clamped object 400 (such as a bolt or a nut), and the gap between the wrench and the clamped object 400 can be eliminated, in the first clamping block 1 and the second clamping member. Under the joint action of the block 2 and the bracket 4, the first clamping surface 13 and the second clamping surface 23 are attached to the outer surface of the object to be clamped 400 to clamp it, so that the clamping faces 13, 23 of the wrench and the surface of the bolt or nut It fits well and prevents slipping.

When the size of the object to be grasped (such as a bolt or a nut) is too large, the two second elastic members 25 are compressed by force, and the second clamping block 2 is moved toward the bottom surface of the clamping block mounting groove 34, and the bracket 4 and the second clamping block 2 There is a certain gap between the two ends. The larger the size of the object to be grasped, the larger the distance that the second clamping block 2 needs to move, and the larger the gap between the two ends of the first clamping block 1 and the two ends of the second clamping block 2 before the rotation, in the limit state, The two clamps 2 can even abut against the bottom surface of the clamp mounting groove 34. When the clamped object 400 needs to be loosened or tightened, first, the trigger body 100 rotates clockwise or counterclockwise along the thread direction, and the second clamp block 2 is driven to rotate at a small angle with respect to the bracket 4, and the second clamp block The gap between one end and the bracket 4 is eliminated, and the second clamp 2 abuts against the bottom surface or the side surface of the clamp mounting groove 34, and the first clamp 1 and the second clamp 2 and the bracket 4 are locked by the clamp 400; When the trigger body 100 is further rotated clockwise or counterclockwise in the thread direction, the clamped object 400 (such as a bolt or a nut) can be loosened or tightened, and during the loosening or tightening process, the clamped object 400 is always Clamping, will not fall easily, can effectively improve work efficiency.

When the size of the object to be held (such as a bolt or a nut) is too small, the bracket 4 and the second clamping block 2 are in contact with each other, and the second clamping block 2 is moved away from the bottom surface of the clamping block mounting groove 34, and the second clamping block 2 There is a large gap with the bottom of the clamp mounting groove 34. The smaller the size of the object to be grasped, the larger the moving distance of the second holder 2, and the larger the gap between the second holder 2 and the bottom of the holder mounting groove 34. When the clamped object 400 needs to be loosened or tightened, firstly, the trigger body 100 rotates clockwise or counterclockwise along the thread, and the bracket 4 and the second clamp 2 are driven to rotate at a small angle with respect to the sleeve hole 200, The end faces of the two clamping blocks 1 and the end faces of the two clamping blocks 2 are relatively slid, so that the second clamping block 2 is placed on the bottom surface or the side surface of the clamping block mounting groove 34, the first clamping block 1 and the second clamping block 2 and The bracket 4 will be locked by the holder 400. The smaller the size of the object to be grasped, the larger the angle at which the second jaw 2 rotates relative to the sleeve hole 200. The trigger body 100 is further rotated clockwise or counterclockwise in the thread direction, so that the clamped object 400 (such as a bolt or a nut) can be loosened or tightened, and the clamped object 400 is always clamped during the loosening or tightening process. It will not fall easily, which can effectively improve work efficiency.

Other technical features of this embodiment are the same as those of Embodiment 1, and are not described herein.

In other embodiments similar to the embodiment, the clamping device 300 may further include three or more clamping blocks, and the bracket 4 has at least one mounting hole respectively penetrating the side wall of the column frame 41 and communicating with the frame through hole 42. . A clamping block is mounted in each mounting hole, wherein at least one clamping block is movably mounted into the mounting hole of the bracket 4, and the other clamping blocks are fixed to the mounting hole. The inner side wall of the frame through hole 42 and the clamping surface of the plurality of clamping blocks surround the clamping hole 3, and the distance between the plurality of clamping blocks is adjustable; the width of the clamping hole 3 in at least one direction is Adjusted. When the trigger 100 is initially rotated along the thread, the plurality of clamps will be locked by the clamp 400; when the trigger 100 is further rotated in the thread direction, the clamped object 400 is tightened or loosened.

In other embodiments similar to the embodiment, the cross-section of the clamping hole 3 may be a waist, a triangle, a rectangle, a hexagon, or an octagon, etc., respectively, corresponding to different shapes and different specifications of the clamped object (such as Bolt or nut).

In other embodiments similar to the present embodiment, as with the second clamp 2, the first clamp 1 can also be movably mounted into a clamp mounting groove 34. Thus, both of the clamps are movable, so that the distance between the two clamps can be adjusted more greatly and the width of the clamped holes can be adjusted.

The beneficial effect of the embodiment is that a wrench is provided, and two movable clamping blocks are arranged in the sleeve hole, so that the width of the clamping hole can be adjusted in a small range. In the case where the size of the clamped object and the clamping portion are small and small, the clamping hole can automatically adjust the inner diameter to eliminate the gap between the wrench and the bolt or the nut, so that the clamping surface of the wrench and the object to be clamped The surface fits well, effectively preventing slippage and enhancing the user's hand. In addition, the present invention can prevent the clamped object that is loosened after being screwed and can be fixed on the nip portion without being easily dropped, thereby effectively improving work efficiency and effectively preventing the clamped object (bolt or nut, etc.) from being Damaged.

Example 3

As shown in FIG. 10, the technical features of the present embodiment are mostly the same as those of the first embodiment. The distinguishing feature is that, in the third embodiment, the second clamping block 2 does not include two first positioning slots 24 and two The two elastic members 25 include a second positioning groove 26, a positioning ball 27, and a third elastic member 28. The second positioning groove 26 is recessed from the surface of the second clamping block 2 toward the first clamping block 1 (ie, the second clamping surface 23). The positioning ball 27 is disposed at the notch of the second positioning groove 26, and the third elastic member 28 is disposed in the second positioning groove 26, one end of which is tangent to the bottom of the second positioning groove 26, and the other end of which is connected to the positioning ball 27.

The clamping hole 3 is formed between the two clamping blocks 1, 2, specifically, the clamping hole 3 is a hexagonal hole surrounded by the first clamping surface 13 and the second clamping surface 23, and is clamped The shape of the holder 400 (such as a bolt or nut) is adapted. It is defined that the inner side of the clamping hole 3 can effectively clamp the inner diameter of the object to be clamped 400 as the clamping width. In the embodiment, in the direction of the central axis (central symmetry axis) of the first clamping block 1 and the second clamping block 2, the distance between the first clamping block 1 and the second clamping block 2 is the clamping hole 3 The clamping width of the clamping hole 3 in the direction of the central axis of the first clamping block 1 and the second clamping block 2 is the clamping width of the clamping hole 3. Since the distance between the first clamping block 1 and the second clamping block 2 is adjustable, the aperture size of the clamping hole 3 is adjustable, and the clamping width of the clamping hole 3 is adjustable.

Since the third elastic member 28 is disposed in the second positioning groove 26, the positioning ball 27 is tangent to the surface of the object to be clamped 400, so the position of the positioning ball 27 in the second positioning groove 26 is adjustable, and the second clamping block 2 is adjustable. The position of the clamp mounting groove 34 is adjustable.

When the clamping device 300 is idle, the third elastic member 28 is in a relaxed state, and a large portion of the positioning ball 27 protrudes into the clamping hole 3.

When the clamping device 300 is in use, the clamping hole 3 is sleeved outside the clamped object 400 (such as a bolt or a nut), and under the elastic force of the third elastic member 28, the ball 27 and the clamped object 400 (such as a bolt or The surface of the nut is tangent or will be caught by the clamp 400. The first clamping surface 13 and the second clamping surface 23 and the positioning ball 27 are attached to the outer surface of the clamped object 400 to clamp it, so that the clamp is clamped. The surfaces 13 and 23 are well fitted to the surface of the bolt or nut to prevent slippage.

Similar to Embodiment 1, when the clamped object 400 needs to be loosened or tightened, the clamping hole 3 is placed outside the clamped object 400 (such as a bolt or a nut), and the between the wrench and the clamped object 400 can be eliminated. a gap, the first clamping surface 13, the second clamping surface 23 and the surface of the positioning ball 27 are attached to the outer surface of the object to be clamped 400 to clamp the first clamping block 1 and the second clamping block 2, The clamping faces 13 and 23 of the wrench are well fitted to the surface of the bolt or the nut to effectively prevent slippage.

When the size of the object to be grasped (such as a bolt or a nut) is too large, the third elastic member 28 is compressed by force, and there is a certain gap between the two ends of the first clamping block 1 and the two ends of the second clamping block 2. After the third elastic member 28 is compressed, the second clamping block 2 moves toward the bottom surface of the clamping block mounting groove 34, and the larger the size of the object to be grasped, the two ends of the first clamping block 1 and the second clamping block 2 before the rotation. The larger the gap between the two, the larger the moving distance of the second clamp 2 after the rotation; in the limit state, the second clamp 2 can even abut against the bottom surface of the clamp mounting groove 34. When the clamped object 400 needs to be loosened or tightened, first, the trigger body 100 rotates clockwise or counterclockwise along the thread direction, and the first clamp block 1 is driven to rotate at a small angle with respect to the second clamp block 2, The gap between the clamp 1 and the second clamp 2 is eliminated; then, the trigger 100 is further rotated clockwise or counterclockwise along the thread direction to release the clamped object 400 (such as a bolt or nut) or Tighten. During the loosening or tightening process, the clamped object 400 is always clamped and does not fall easily, which can effectively improve work efficiency.

When the size of the object to be held (such as a bolt or a nut) is small, both ends of the first clamping block 1 are in contact with the two ends of the second clamping block 2, and there is a large gap between the second clamping block 2 and the bottom of the clamping block mounting groove 34. . When the clamped object 400 needs to be loosened or tightened, first, the trigger body 100 rotates clockwise or counterclockwise along the thread direction, and the first clamp block 1 and the second clamp block 2 are driven to be small relative to the sleeve hole 200. When the angle is rotated, the end faces of the first clamping block 1 and the end faces of the second clamping block 2 are oppositely slid, and the second clamping block 2 is placed on the bottom surface or the side surface of the clamping block mounting groove 34, and the first clamping block 1 and the second clamping member Block 2 and the positioning ball will be locked by the holder 400. The smaller the size of the object to be grasped, the larger the gap between the second clamp 2 and the bottom of the clamp mounting groove 34 before the rotation, and the greater the angle at which the second clamp 2 rotates relative to the sleeve 200 after the rotation. Then, the trigger body 100 is further rotated clockwise or counterclockwise along the thread direction, and the first clamping block 1, the second clamping block 2, the sleeve hole 200 and the clamped object 400 are relatively fixed to enable the clamped object 400 (such as a bolt). The nut or the nut is loosened or tightened. During the loosening or tightening process, the clamped object 400 is always clamped and does not fall easily, which can effectively improve work efficiency.

Other technical features of this embodiment are the same as those of Embodiment 1, and are not described herein.

In other embodiments similar to the embodiment, the clamping device 300 may further include three or more clamping blocks, which are also installed into the sleeve hole 200; the clamping holes 3 are formed between the plurality of clamping blocks, and the plurality of clamping blocks are formed. At least one of the clamping blocks is movably mounted to the inner side wall of the sleeve hole 200, and the clamping surface of the one or more clamping blocks may be provided with a retractable positioning device, including a positioning groove, a positioning ball and an elastic member. The clamped object 400 is fixed. The distance between the plurality of clamps is adjustable; the width of the clamp apertures 3 in at least one direction is adjustable. When the trigger 100 is initially rotated along the thread, the plurality of clamps will be locked by the clamp 400; as the trigger 100 is further rotated along the threads, the clamped object 400 is tightened or released.

In other embodiments similar to the embodiment, the cross-section of the clamping hole 3 may be a waist shape, a triangle shape, a rectangular shape, a hexagon shape, or an octagon shape, and the corresponding objects 400 of different shapes and different specifications are respectively supported ( Such as bolts or nuts).

The beneficial effect of this embodiment is that a wrench is provided for fixing the object to be clamped in the clamping hole by using a positioning device. In the case where the size of the clamped object and the nip portion are small and small, the holding hole can automatically adjust the inner diameter size. According to the present invention, the object to be clamped which is loosened after being screwed can be fixed to the nip portion without being easily dropped, so that work efficiency can be effectively improved, and the object to be clamped (bolt or nut, etc.) can be effectively prevented from being damaged.

Example 4

As shown in FIG. 11 , the present embodiment provides a wrench, which includes most of the technical features of Embodiment 1, such as the trigger body 100 and the sleeve hole 200 and the clamping device 300 . The distinguishing feature is that the embodiment 4 further includes a ratchet structure. Installed on the outside of the clamping device 300; the clamping block mounting groove 34 is recessed on the inner side wall of the ratchet ring 51, and the second clamping block 2 is movably mounted to the clamping block mounting groove 34; at the same time, the embodiment further includes a sleeve hole concave The groove 35 has a crescent shape in cross section and is recessed in the inner side wall of the sleeve hole 200.

The ratchet structure includes a ratchet ring 51, a pawl 52, and a fourth elastic member 53. The ratchet ring 51 is rotatably mounted into the sleeve hole 200 and sleeved outside the clamping device 300; the pawl 52 is engaged with the ratchet ring 51; the fourth elastic member 53 is connected at one end to the trigger body 100, and the other end is connected to the other end Pawl 52.

The ratchet ring 51 includes a driving portion 511 and an annular tooth 512. The driving portion 511 is disposed inside the ratchet ring 51 and fixed to the outside of the clamping device 300. The annular gear teeth 512 are disposed outside the ratchet ring 51. The clamping device 300 is fixedly or rotatably mounted into the ratchet ring 51 and fixedly coupled to the driving portion 511. After the clamped portion 400 is placed in the clamping hole 3, the clamped object 400 is opposite to the driving portion 511. fixed. The first clamping block 1 and the second clamping block 2 are movably mounted into the ratchet ring 51. The distance between the first clamping block 1 and the second clamping block 2 is adjustable, and the aperture size of the clamping hole 3 is adjustable. The inside of the clamping hole 3 is defined to effectively clamp the inner diameter of the clamped object 400 to the clamping width, and the clamping width of the clamping hole 3 is adjustable. In this embodiment, the structure and working principle of the first clamping block 1 and the second clamping block 2 are the same as those in the first embodiment, and are not described herein.

The pawl 52 includes a ratchet block 521, a ratchet 522, and an elastic member mounting groove 523. The ratchet block 521 is disposed in a set of hole recesses 35, one side of which is tangent to the side wall of the sleeve hole recess 35. The ratchet teeth 522 are disposed on the other side of the ratchet block 521 and are in mesh with the annular gear teeth 512; the elastic member mounting groove 523 is disposed on the bottom surface of the pawl 52 for mounting the fourth elastic member 53; the fourth elastic member 53 One end is connected to the bottom or inner wall of the clamp mounting groove 34, and the other end is connected to the pawl 52.

In this embodiment, the trigger body 100 rotates clockwise, and the ratchet ring 51, the pawl 52 and the trigger body 100 are engaged together to form a relatively fixed whole body. The second clamping block 2 is mounted on the ratchet ring 51. Slide 34 and clamp the clamped object 400 (such as a bolt or nut) together with the first clamp 1. When the trigger body 100 rotates counterclockwise, the clamped object 400 drives the first clamping block 1 and the second clamping block 2 to rotate by a certain angle, and then the second clamping block 2 is placed on the bottom surface and the side surface of the clamping block mounting groove 34, so that the ratchet structure A relatively fixed unitary body is formed such that the trigger body 100 is swung. The ratchet structure and the clamping device operate independently of each other and do not interfere with each other.

In other embodiments similar to the present embodiment, the ratchet structure is also mounted externally to a clamping device 300, which may be constructed identically to the clamping device 300 of Embodiment 2 or 3.

The beneficial effect of this embodiment is that the adjustable width clamping device is combined with the ratchet structure to form a ratchet wrench that can adjust the width of the clamping hole. In the case where the size of the clamped object and the clamping portion are small and small, the clamping hole can automatically adjust the inner diameter to eliminate the gap between the wrench and the bolt or the nut, so that the clamping surface of the wrench and the object to be clamped The surface fits well, effectively preventing slippage and enhancing the user's hand. In addition, the present invention can prevent the clamped object that is loosened after being screwed and can be fixed on the nip portion without being easily dropped, thereby effectively improving work efficiency and effectively preventing the clamped object (bolt or nut, etc.) from being Damaged.

The above has described in detail the preferred embodiments of the invention. It will be appreciated that many modifications and variations can be made in the present invention without departing from the scope of the invention. Therefore, any technical solution that can be obtained by a person skilled in the art based on the prior art based on the prior art by logic analysis, reasoning or limited experimentation should be within the scope of protection determined by the claims.

Claims (20)

 A wrench comprising: Trigger a sleeve hole recessed on a side surface of the trigger body or penetrating the trigger body; a clamping device disposed in the sleeve hole; A clamping hole is disposed in a middle portion of the clamping device; an aperture size of the clamping hole is adjustable. The wrench of claim 1 wherein said gripping means comprises Two or more clamping blocks disposed opposite to each other and surrounding the clamping holes; Wherein the inner hole wall of the clamping hole comprises a side wall of the two or more clamping blocks; The distance between the two or more clamps is adjustable. The wrench of claim 2 wherein a clamp comprises a clamping block, which is part of a cylinder; a clamping opening extending through the top and bottom of the clamping block with the opening direction facing the other clamping block; A clamping surface that is an inner side wall of the clamping opening. A self-locking wrench according to claim 2, wherein The clamping device also includes a first groove recessed in an inner side wall of the sleeve hole; a second recess recessed to an outer sidewall of the clip; and disposed opposite the first recess; a first elastic member that is snapped into the first groove and the second groove; Wherein, the shape of the first groove, the second groove and the first elastic member is a part of an annular shape. The wrench of claim 1 further comprising The clamping block mounting groove is recessed in the inner side wall of the sleeve hole, and at least one clamping block is mounted to the clamping block mounting groove. The wrench of claim 2, wherein The clamping device also includes A bracket is mounted into the sleeve hole; at least one jaw is movably mounted to the bracket. The wrench of claim 6 wherein: The bracket includes a columnar frame that is snapped into the sleeve hole; a frame through hole extending through the top and bottom of the columnar frame; Two or more mounting holes respectively penetrating through the side wall of the column frame body and communicating to the frame body through hole; Each of the mounting holes is movably or fixedly mounted with a clamping block, and an inner side wall of the frame through hole and a clamping surface of the two or more clamping blocks surround the clamping hole. The wrench of claim 7 wherein: The outer side wall of the column frame is tangent to the inner side wall of the sleeve hole; The top end and the bottom end of the outer side wall of the column frame are respectively provided with a protruding flange; Two flanges are engaged on the surfaces on both sides of the trigger. The wrench of claim 1 further comprising A ratchet ring is rotatably mounted into the sleeve hole and sleeved outside the clamping device. A self-locking wrench according to claim 9 wherein: The clamping device also includes a first recess recessed in an inner side wall of the ratchet ring; a second recess recessed to an outer sidewall of the clip; and disposed opposite the first recess; a first elastic member that is snapped into the first groove and the second groove; Wherein, the shape of the first groove, the second groove and the first elastic member is a part of an annular shape. The wrench of claim 9 further comprising The clamp mounting groove is recessed to the inner side wall of the ratchet ring, and at least one clamp is mounted to the clamp mounting groove. A wrench according to claim 5 or 11, wherein At least one clamp is movably mounted into the clamp mounting slot; the clamp includes a first positioning groove recessed on a surface of the clamping block toward a bottom side of the clamp mounting groove; The second elastic member is disposed in the first positioning groove, one end of which is tangent to the bottom of the first positioning groove, and the other end of which is tangent to the bottom of the clamping piece mounting groove. A wrench according to claim 5 or 11, wherein At least one clamp is mounted into the clamp mounting slot; the clamp includes a second positioning groove recessed on a surface of the clamping block facing one side of the other clamping block; Positioning a ball, disposed at a slot of the second positioning slot, and a third elastic member is disposed in the second positioning groove, one end of which is tangential or connected to the bottom of the second positioning groove, and the other end of which is connected to the positioning ball; A portion of the surface of the positioning ball and a clamping surface of the two or more clamping blocks enclose the clamping hole. The wrench of claim 9 wherein: The clamping device also includes A bracket is mounted within the ratchet ring; at least one clip is movably mounted to the bracket. The wrench of claim 14 wherein: The bracket includes a columnar frame that snaps to the inside of the ratchet ring; a frame through hole extending through the top and bottom of the columnar frame; Two or more mounting holes respectively penetrating through the side wall of the column frame body and communicating to the frame body through hole; Each of the mounting holes is movably or fixedly mounted with a clamping block, and an inner side wall of the frame through hole and a clamping surface of the two or more clamping blocks surround the clamping hole. The wrench of claim 15 wherein: The outer side wall of the column frame is tangent to the inner side wall of the ratchet ring; The top end and the bottom end of the outer side wall of the column frame are respectively provided with a protruding flange; Two flanges are engaged on the surfaces on both sides of the ratchet ring. The wrench of claim 9 further comprising a hole recessed in the inner side wall of the sleeve hole; a pawl disposed in the sleeve recess and engaging the ratchet ring; The fourth elastic member is disposed in the sleeve hole, one end of which is connected to the bottom or inner wall of the sleeve hole, and the other end of which is connected to the pawl. The wrench of claim 17 wherein: The ratchet ring includes a driving portion disposed inside the ratchet ring and fixed to an outer side of the clamping device; An annular tooth is disposed outside the ratchet ring; The pawl includes a ratchet block, one side of which is tangent to the side wall of the sleeve hole; a ratchet disposed on the other side of the ratchet block and engaging the annular gear teeth; The elastic member mounting groove is disposed on the bottom surface of the pawl for mounting the fourth elastic member; Wherein, the fourth elastic member is connected at one end to the bottom or inner wall of the sleeve hole, and the other end is connected to the pawl. The wrench of claim 1 wherein: The clamping hole has a cross section of a waist, a triangle, a rectangle, a hexagon or an octagon. A self-locking wrench according to claim 6 or 14, wherein The material of the bracket is a hard plastic.