CN111745577A

CN111745577A - A kind of spanner

Info

Publication number: CN111745577A
Application number: CN201910252815.1A
Authority: CN
Inventors: 陈加成
Original assignee: Shanghai Yudi Technology Co ltd
Current assignee: Shanghai Yudi Technology Co ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-10-09

Abstract

The invention discloses a wrench, which comprises a handle part and a clamping part, wherein the clamping part comprises a first clamping part and a second clamping part, the handle part is integrally connected with a baffle, the baffle is clamped at the outer side of the first clamping part, the clamping part is symmetrically provided with a first groove body and a first ratchet wheel positioned in the first groove body at two sides of a cavity, the outer side of the clamping part is provided with a second ratchet wheel, the second clamping part is clamped with a limiting piece, the limiting piece is provided with a second groove body, a sliding piece matched with the first ratchet wheel for changing the size of the cavity is arranged in the second groove body, the second clamping part is symmetrically provided with a bulge close to the first clamping part, the bulge is provided with a buckle structure, and one end of the first clamping part close to the second clamping part is provided with a through groove matched; one side of the handle part close to the clamping part is provided with a transmission part which is matched with the second ratchet wheel for use so as to realize the forward rotation and the reverse rotation of the second ratchet wheel. The wrench of the invention can realize the adjustable opening size and the continuous operation.

Description

A kind of spanner

Technical Field

The invention relates to a manual tool, in particular to a wrench.

Background

At present, the wrenches commonly used in production and life mainly comprise solid wrenches, adjustable wrenches, ratchet wrenches and the like. One end or two ends of the solid wrench are provided with openings with fixed sizes, one wrench cannot adapt to the working requirements of various specifications, and therefore the solid wrench can be manufactured into various specifications, and complex work needs to be carried with a plurality of handles. The opening width of the adjustable wrench can be adjusted within a certain size range, and bolts or nuts of different specifications can be screwed, but the handle of the existing adjustable wrench can only rotate by a small angle, so that a workpiece needs to be continuously rotated for multiple times to be screwed or unscrewed. In the process of two rotations, the wrench needs to be stopped to rotate in the opposite direction, the wrench is usually separated from the workpiece, and the wrench is sleeved again to rotate again after rotation, so that the operation method is very inconvenient and the rotation efficiency is low. The ratchet handle can simplify the operation, and the ratchet handle can rotate without separating the wrench from a workpiece by rotating, but the size of the opening of a common ratchet wrench is fixed, so that the ratchet handle cannot be adjusted, and is very inconvenient. The difficulty is large when the ratchet structure and the opening are combined together in an adjustable mode.

Disclosure of Invention

The invention aims to solve the problems that the opening of the existing adjustable wrench is adjustable, but the opening needs to be separated from a workpiece temporarily to rotate, and the wrench is sleeved again to rotate, so that the operation is troublesome and the efficiency is low.

In order to achieve the purpose, the invention adopts the following technical scheme: a wrench comprising a handle portion and a clamping portion, the clamping portion comprising a first clamping portion and a second clamping portion, the handle part is integrally connected with a baffle which is clamped at the outer side of the first clamping part, the first clamping part and the second clamping part are connected to enclose a cavity for accommodating a part to be rotated, the clamping part is symmetrically provided with a first groove body and a first ratchet wheel positioned in the first groove body at two sides of the cavity, a second ratchet wheel is arranged on the outer side of the clamping part, a limiting part is clamped on the second clamping part, a second groove body is arranged on the end face of the limiting part, the second groove body is communicated with the side surface of the limiting piece, a sliding piece which is matched with the first ratchet wheel for use to change the size of the cavity is arranged in the second groove body, one side of the handle part close to the clamping part is provided with a transmission part which is matched with the second ratchet wheel for use so as to realize the forward rotation and the reverse rotation of the second ratchet wheel.

The parts to be screwed can be nuts, bolts, screws and nuts. The first clamping part and the second clamping part can be arranged separately or integrally, and when the second clamping part and the first clamping part are arranged separately, the wrench is also suitable for arranging the part to be screwed on an infinite-length rod-shaped object.

When the clamping device is used, the limiting piece is clamped on the second clamping portion, and the first clamping portion and the second clamping portion are connected to form a cavity in a surrounding mode. Placing the part to be rotated in the cavity, rotating the limiting piece, wherein the sliding piece on the limiting piece is meshed with the first ratchet wheel and moves on the first ratchet wheel until the limiting piece is contacted with the part to be rotated and fixes the part to be rotated; the handle part is rotated, external force acts on the transmission part by the handle part, and the transmission part drives the second ratchet wheel to rotate, so that the part to be screwed is screwed up or unscrewed.

The limiting piece is matched with the first ratchet wheel for use and used for fixing the component to be rotated; the transmission part is used with the cooperation of second ratchet, treats through the drive of handle portion and screws up or unscrew the operation to the part of waiting to revolve, realizes screwing in succession, need not to leave the spanner at the process of screwing and move the part of waiting to revolve.

The sliding piece comprises a button, a first spring connected with the button and a first pawl located at the end of the first spring, and the first pawl extends out of the side face end of the second groove body and is meshed with the first ratchet wheel.

The positive slip locating part, the cavity reduces gradually, when needs increase cavity, stirs the button to cavity center direction and does not put, and the button drives first pawl, and in first pawl withdrawal second cell body, at this moment can the reverse slip locating part, loosens the button, locating part position fixing.

The second clamping portion is provided with a first jack outside the first ratchet wheel, the limiting piece is provided with a first plug matched with the first jack at a position corresponding to the first jack, and the first plug is connected with the button and is inserted into or separated from the first jack under the action of the button.

The clamping device comprises a first clamping part, a second clamping part, a clamping structure and a clamping piece, wherein the first clamping part and the second clamping part are arranged in a matched mode, the second clamping part is symmetrically provided with bulges close to the first clamping part, the bulges are provided with the clamping structure, and one end, close to the second clamping part, of the first clamping part is provided with a through groove matched with the clamping structure for use.

Preferably, the buckle structure comprises a second spring and a clamping piece connected with the second spring, and the clamping piece extends into or out of the through groove under the action of external force.

The clamping structure is used for fixing the first clamping part and the second clamping part, the second clamping part moves towards the direction of the first clamping part until the clamping piece is inserted into the through groove, and the fixing process of the first clamping part and the second clamping part is finished; when the second clamping part needs to be moved out, the clamping piece is pressed and fixed, the clamping piece drives the second spring to leave the through groove, and the second clamping part can move freely.

Wherein, the driving medium includes the cylinder, is located the cylinder top and is provided with the knob, cylinder bottom cross arrangement is equipped with second pawl and third pawl, cylinder one side is connected with the dead lever, the cylinder opposite side is connected with the dwang, one side that handle portion is close to the driving medium is provided with the fixed slot, the dead lever is located the fixed slot to receive external force effect round trip movement in the fixed slot, the dwang is located between second pawl and the third pawl, second pawl and third pawl mesh with the second ratchet respectively mutually.

When the handle part needs to be pulled clockwise, the knob is rotated clockwise, the fixing rod and the rotating rod rotate along with the knob, the fixing rod is fixed on one side of the fixing groove, the rotating rod props against the second pawl (third pawl) to enable the second pawl (third pawl) not to be in contact with the second ratchet wheel, the third pawl (second pawl) is in contact with the second ratchet wheel, the handle part is pulled clockwise, the third pawl (second pawl) is meshed with the second ratchet wheel, the handle part can be pulled continuously to screw or unscrew a part to be screwed, the part to be screwed does not need to leave in the pulling process, and the operation efficiency is higher; on the contrary, when the handle portion needs to be pulled anticlockwise, the knob is rotated anticlockwise, the fixing rod and the rotating rod rotate along with the knob, the fixing rod is fixed on the other side of the fixing groove, the rotating rod abuts against the third pawl (the second pawl), the third pawl (the second pawl) cannot be in contact with the second ratchet wheel, the second pawl (the third pawl) is in contact with the second ratchet wheel, the handle portion is pulled anticlockwise, the second pawl (the third pawl) is meshed with the second ratchet wheel, and the handle portion can be pulled continuously to be unscrewed or screwed.

One end of the baffle is hinged to a ring body, a lock catch is arranged at the end of the ring body, and a lock head matched with the lock catch is arranged at the other end of the baffle.

The arrangement of the ring body, the lock catch and the lock head can fix the first clamping part and the second clamping part, so that the wrench is more stable in use.

Wherein, the inner side of the first clamping part is movably provided with a first clamping surface and a second clamping surface.

The movable arrangement means that the first clamping surface and the second clamping surface can move up and down along the first clamping part, and the first clamping surface and the second clamping surface can be separated from the first clamping part to replace the first clamping surface and the second clamping surface.

The first clamping surface and the second clamping surface are specially arranged for small parts to be screwed, the first clamping surface and the second clamping surface are surfaces which are in contact with the parts to be screwed and are used for fixing two surfaces of the parts to be screwed, the limiting part is used for fixing the other surface of the parts to be screwed, and the first clamping surface, the second clamping surface and the limiting part are used for fixing three surfaces of the parts to be screwed, so that the stability of the parts to be screwed in the process of screwing is ensured.

The connecting end of the first clamping face, the second clamping face and the first clamping portion is provided with a fourth spring and an insert connected with the fourth spring, one end, far away from the fourth spring, of the insert is provided with a smooth curved surface, and the first clamping portion is provided with a plurality of third groove bodies matched with the insert for use.

When the first clamping surface and the second clamping surface need to move up and down, the first clamping surface and the second clamping surface act upwards or downwards, the plug-in piece leaves one of the third groove bodies and stops when reaching a proper position, and the plug-in piece is clamped in the other third groove body; when the first clamping surface and the second clamping surface are used for fixing the part to be screwed, the upper end surfaces of the first clamping surface and the second clamping surface are in the same horizontal plane.

By adopting the scheme, the positions of the first clamping surface and the second clamping surface are adjusted, and the problems that the part to be screwed is too small in size and suspended and cannot be normally screwed up or unscrewed to be screwed up are avoided.

The upper end face and the lower end face of the second clamping portion are symmetrically provided with first grooves, one side, close to the first clamping portion, of the second clamping portion is provided with a second groove, and the first groove and the second groove are used for clamping limiting pieces.

Wherein the first clamping part and the second clamping part are fixedly connected.

The first clamping portion and the second clamping portion may be integrally connected.

Wherein the first clamping part and the second clamping part are detachably connected.

Preferably, the second clamping part is provided with protrusions symmetrically close to the first clamping part, the protrusions are provided with buckle structures, and one end of the first clamping part close to the second clamping part is provided with a through groove matched with the buckle structures for use.

The second clamping part and the limiting part are connected with the first clamping part through a third spring respectively.

The second clamping part and the limiting piece are connected with the first clamping part through the spring, so that the wrench is suitable for arranging the part to be rotated on an infinitely long rod-shaped object, and is prevented from being lost when the second clamping part and the limiting piece are disassembled.

The first clamping part is provided with a rotating shaft, and the second clamping part is movably connected with the first clamping part through the rotating shaft.

Compared with the prior art, the invention has the following beneficial effects: the wrench disclosed by the invention can realize the adjustment of the opening size, can be used for screwing or unscrewing parts to be screwed in different sizes, can also realize the continuous pulling of the parts to be screwed, does not need to leave the parts to be screwed in the process of pulling the parts to be screwed, and improves the working efficiency.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a perspective view of a disclosed wrench in accordance with embodiment 1 of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is a top view of the disclosed wrench of example 1 of the present invention;

FIG. 4 is a cross-sectional view taken along line d-d of FIG. 3;

FIG. 5 is a schematic view of a transmission member of the wrench disclosed in embodiment 1 of the present invention;

FIG. 6 is a front view of the wrench disclosed in embodiment 1 of the present invention;

FIG. 7 is a cross-sectional view taken along the direction of line b-b in FIG. 6;

FIG. 8 is a right side view of the disclosed wrench of embodiment 1 of the present invention;

FIG. 9 is a cross-sectional view taken in the direction of FIG. 8 c-c;

fig. 10 is a partial enlarged view at C of fig. 9;

FIG. 11 is a cross-sectional view taken in the direction of FIGS. 8 e-e;

FIG. 12 is a diagram showing a connection relationship between a third button and a clamping member in the wrench disclosed in embodiment 1 of the present invention;

FIG. 13 is an enlarged view of a portion of FIG. 12 at B;

FIG. 14 is a perspective view of the disclosed wrench of embodiment 2 of the present invention;

FIG. 15 is a perspective view of the disclosed wrench of embodiment 3 of the present invention;

FIG. 16 is a perspective view of the disclosed wrench of embodiment 4 of the present invention;

FIG. 17 is a perspective view of the disclosed wrench of embodiment 5 of the present invention;

fig. 18 is a perspective view of the wrench according to embodiment 5 of the present invention after the second clamping portion is connected to the limiting member;

fig. 19 is a diagram illustrating a connection relationship between a button and a first plug in the wrench disclosed in embodiment 5 of the present invention.

Wherein: the clamping device comprises a first clamping part 1, a second clamping part 2, a cavity 3, a first clamping surface 4, a second clamping surface 5, a first groove body 6, a first ratchet wheel 7, a second ratchet wheel 8, a first groove 9, a second groove 10, a limiting piece 11, a second groove body 12, a protrusion 14, a buckling structure 15, a through groove 16, a handle part 17, a transmission piece 18, a button 19, a first spring 20, a first pawl 21, a second spring 22, a clamping piece 23, a column 24, a knob 25, a second pawl 26, a third pawl 27, a fixing rod 28, a rotating rod 29, a fixing groove 30, a lock 31, a lock head 32, a fourth spring 33, an insertion piece 34, a third groove body 35, a third spring 36, a baffle 37, a ring body 38, a first plug 39, a first insertion hole 40, a third button 44, a fifth spring 45, a rotating shaft 46, a telescopic rod 47 and a sixth spring 48.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 19. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Example 1

As shown in fig. 1 and 2, a wrench comprises a handle portion 17 and a clamping portion, the clamping portion includes a first clamping portion 1 and a second clamping portion 2, the handle portion 17 is integrally connected with a baffle 37, the baffle 37 is clamped at the outer side of the first clamping portion 1, the first clamping portion 1 and the second clamping portion 2 enclose a cavity 3 for accommodating a component to be screwed, a first clamping surface 4 and a second clamping surface 5 are movably arranged at the inner side of the first clamping portion 1, the number of the first clamping surface 4 and the second clamping surface 5 may not be limited to 1, and the number of the first clamping surface 4 and the number of the second clamping surface 5 may be the same or different. The common parts to be screwed are outer hexagonal nuts, bolts, screws and nuts, the included angle between adjacent side faces is 60 degrees, and in order to increase the stability and effectiveness of the wrench in use, the included angle between the first clamping face 4 and the second clamping face 5 is preferably set to be 60 degrees. The clamping part is symmetrically provided with a first groove body 6 and a first ratchet wheel 7 positioned in the first groove body 6 at two sides of the cavity 3, the outer side of the clamping part is provided with a second ratchet wheel 8, the upper end surface and the lower end surface of the second clamping part 2 are symmetrically provided with a first groove 9, one side of the second clamping part 2 close to the first clamping part 1 is provided with a second groove 10, the first groove 9 and the second groove 10 are used for clamping a workpiece 11, the workpiece 11 is arranged on the workpiece 11, the lower end surfaces of the two groove bodies are symmetrically provided with second groove bodies 12 respectively, the second groove bodies 12 are communicated with the side surfaces of the I-shaped piece 11, sliding pieces matched with the first ratchet wheel 7 to change the size of the cavity 3 are arranged in the second groove bodies 12, bulges 14 are symmetrically arranged on the second clamping part 2 close to the first clamping part 1, a buckle structure 15 is arranged on the bulges 14, and a through groove 16 matched with the buckle structure 15 is arranged at one end of the first clamping part 1 close to the second clamping part 2; the handle part 17 is provided with a transmission member 18 which is matched with the second ratchet wheel 8 to realize the forward rotation and the reverse rotation of the second ratchet wheel 8 at one side close to the clamping part.

The workpiece 11 is of a vertically symmetrical structure, when the workpiece is used, the upper half part or the lower half part of the workpiece 11 is used independently, and the upper half part or the lower half part of the workpiece 1 is clamped in the first groove 9 and the second groove 10, so that the same working process as the workpiece 11 can be completed, and the fixing effect of a part to be screwed is realized; however, because the workpiece 11 has a fixing function at both ends of the part to be screwed, the workpiece 11 has better stability to the part to be screwed than the upper half part or the lower half part is used alone.

As shown in fig. 3 and 4, the connecting ends of the first clamping surface 4, the second clamping surface 5 and the first clamping portion 1 are provided with a fourth spring 33 and an insert 34 connected with the fourth spring 33, one end of the insert 34 far away from the fourth spring 33 has a smooth curved surface, and the first clamping portion 1 is provided with a plurality of third grooves 35 in parallel for matching with the insert 34.

When the first clamping surface 4 and the second clamping surface 5 need to move up and down, an upward or downward acting force is applied to the first clamping surface 4 and the second clamping surface 5, the fourth spring 33 is extruded under the action of an external force, and the plug-in piece 34 is driven to leave the original third groove body 35 and is fixed in the other third groove body 35 to a proper position.

The number of the third grooves 35 may be 2, 3, 4, or even more, and may be set according to the use requirement.

The positions of the first clamping surface 4 and the second clamping surface 5 are adjustable, so that the wrench can be suitable for parts to be screwed with different sizes, and the problem that the part to be screwed with the small size is suspended in the cavity 3 is avoided.

As shown in fig. 8, 9 and 10, the sliding member includes a button 19, a first spring 20 connected to the button 19, and a first pawl 21 located at an end of the first spring 20, wherein the first pawl 21 extends out of a side end of the second groove 12 to engage with the first ratchet 7. Since the sawtooth direction of the first ratchet wheel 7 is towards the left, the first pawl 21 can only slide towards the left to tightly clamp the part to be rotated; when the first pawl 21 needs to slide rightwards, the button 19 is pressed towards the center of the cavity 3 and is not moved, the first pawl 21 is acted by the first spring 20 and returns to the second groove body 12, when the workpiece 11 is moved rightwards to a proper position, the button 19 is released, the first pawl 21 is meshed with the first ratchet wheel 7, and the first pawl 21 cannot slide rightwards continuously.

As shown in fig. 5, 6 and 7, the transmission member 18 includes a cylinder 24, a knob 25 is disposed at the top end of the cylinder 24, a second pawl 26 and a third pawl 27 are crossly sleeved at the bottom end of the cylinder 24, a fixing rod 28 is connected to one side of the cylinder 24, a rotating rod 29 is connected to the other side of the cylinder 24, a fixing groove 30 is disposed at one side of the handle portion 17 close to the transmission member 18, the fixing rod 28 is disposed in the fixing groove 30 and moves back and forth in the fixing groove 30 under the action of an external force, the rotating rod 29 is disposed between the second pawl 26 and the third pawl 27, the second pawl 26 and the third pawl 27 are respectively engaged with the second ratchet wheel 8, and the second pawl 26 and the third pawl 27 are respectively.

As shown in fig. 8 and 11, the snap structure 15 includes a second spring 22 and a latch 23 connected to the second spring 22, and the latch 23 is extended into or out of the through slot 16 by external force.

After the wrench of the present invention is used for operation, the clamping member 23 needs to be pressed to enable the buckling structure 15 to leave the through groove 16, but when the diameter of the member to be rotated is large and an operator cannot stretch into the cavity 3 to complete the operation, as shown in fig. 12 and 13, a third button 44 is arranged on the side surface of the second clamping portion 2, an expansion link 47 is arranged at the end of the third button 44, the expansion link 47 extends inwards and is fixedly connected with the clamping member 23, and a fifth spring 45 is sleeved on the expansion link 47.

The telescopic rod 47 is fixedly connected with the third button 44, and the telescopic rod 47 moves back and forth under the action of the fifth spring 45.

When the clamping device is used, the workpiece 11 is clamped in the second clamping portion 2, then the clamping structure 15 of the second clamping portion 2 is fixed in the through groove 16, so that the first clamping portion 1 and the second clamping portion 2 are connected, and at the moment, the first clamping portion 1 and the second clamping portion 2 enclose a cavity 3 for placing a part to be screwed. Placing a part to be rotated in the cavity 3, fixing two surfaces of the part to be rotated by a first clamping surface 4 and a second clamping surface 5 of the first clamping part 1, rotating the I-shaped part 11, wherein a sliding part on the I-shaped part 11 is meshed with a first ratchet wheel 7 and moves on the first ratchet wheel 7 until the I-shaped part 11 is contacted with the part to be rotated and fixes the other surface of the part to be rotated, and the first clamping surface 4, the second clamping surface 5 and the I-shaped part 11 form three surfaces for fixing the part to be rotated, so that the stability of the part to be rotated in the rotating process is ensured; before the handle part 17 is rotated, the knob 25 is rotated clockwise (anticlockwise), the fixing rod 28 and the rotating rod 29 rotate along with the knob, the fixing rod 28 is fixed at one end of the fixing groove 30, the rotating rod 29 blocks the second pawl 26 (the third pawl 27) so that the second pawl 26 (the third pawl 27) cannot be contacted with the second ratchet wheel 8, the third pawl 27 (the second pawl 26) is contacted with the second ratchet wheel 8, the handle part 17 is rotated clockwise, the third pawl 27 (the second pawl 26) is meshed with the second ratchet wheel 8, the handle part 17 can be continuously rotated to screw or unscrew a part to be screwed, the part to be screwed does not need to be separated in the rotating process, and the operation efficiency is higher; conversely, turning the handle portion 17 counterclockwise is similar to the clockwise turning action.

When the screwing or unscrewing process of the part to be screwed is finished, the hand stretches into the cavity 3 to press the clamping piece 23, so that the clamping structure 15 leaves the through groove 16, or the third button 44 is directly pressed and then released, the third button 44 drives the clamping piece 23 to leave the through groove 16, and the first clamping part 1 and the second clamping part 2 are relatively separated.

Example 2

Referring to fig. 14, unlike embodiment 1, one end of the baffle 37 is hinged to a ring 38, the end of the ring 38 is provided with a lock 31, and the other end of the baffle 37 is provided with a lock 32 used in cooperation with the lock 31.

Before the handle part 17 is rotated, the lock catch 31 of the ring body 38 needs to be buckled in the lock head 32, the part to be screwed is secondarily fixed, and the problem that the part to be screwed is suspended in the screwing and unscrewing processes is solved.

Example 3

As shown in fig. 15, unlike embodiment 2, the second clamp 2 and the tool 11 are connected to the first clamp 1 by a third spring 36.

The second clamping part 2 and the workpiece 11 are connected with the first clamping part 1 through the third spring 36, so that the wrench disclosed by the invention is still in a mutual connection state when not in use, and the phenomenon that the normal use is influenced due to the fact that the second clamping part 2 and the workpiece 11 are lost is avoided.

Example 4

As shown in fig. 16, unlike embodiment 2, the first clamping portion 1 is provided with a rotation shaft 46, and the second clamping portion 2 is movably connected to the first clamping portion 1 via the rotation shaft 46.

Example 5

Referring to fig. 17, 18 and 19, unlike embodiment 4, the second clamping portion 2 is provided with a first insertion hole 40 at the outer side of the first ratchet 7, the tool 11 is provided with a first plug 39 matched with the first insertion hole 40 at a position corresponding to the first insertion hole 40, and the first plug 39 is connected with the button 19 and is inserted into or separated from the first insertion hole 40 by the action of the button 19.

After the wrench is used, the workpiece 11 is slid along the opposite direction of the handle part 17 to the outermost side, and the first plug 39 is inserted into the first insertion hole 40, so that the workpiece 11 is fixed on the second clamping part 2, and the problem that the workpiece 11 falls off when the wrench is opened is avoided.

The number of the first insertion holes 39 may be 1, or may be plural, and in an actual use process, the number of the first insertion holes 40 is set to be even, and the even number of the first insertion holes 40 are set to be symmetrical with each other.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A wrench comprises a handle part (17) and a clamping part, and is characterized in that the clamping part comprises a first clamping part (1) and a second clamping part (2), the handle part (17) is integrally connected with a baffle (37), the baffle (37) is clamped on the outer side of the first clamping part (1), the first clamping part (1) and the second clamping part (2) are connected to enclose a cavity (3) for accommodating a part to be rotated, a first groove body (6) and a first ratchet wheel (7) positioned in the first groove body (6) are symmetrically arranged on two sides of the clamping part positioned in the cavity (3), a second ratchet wheel (8) is arranged on the outer side of the clamping part, a limiting part (11) is clamped on the second clamping part (2), a second groove body (12) is arranged on the end face of the limiting part (11), and the second groove body (12) is communicated with the side face of the limiting part (11), a sliding part which is matched with the first ratchet wheel (7) for use so as to change the size of the cavity (3) is arranged in the second groove body (12), and a transmission part (18) which is matched with the second ratchet wheel (8) for use so as to realize the forward rotation and the reverse rotation of the second ratchet wheel (8) is arranged on one side of the handle part (17) close to the clamping part.

2. A wrench as claimed in claim 1, wherein the slider comprises a button (19), a first spring (20) connected to the button (19) and a first pawl (21) at the end of the first spring (20), the first pawl (21) extending beyond the side end of the second slot (12) to engage with the first ratchet (7).

3. A wrench as claimed in claim 2, wherein the second clamping portion (2) is provided with a first socket (40) at an outer side of the first ratchet (7), the retaining member (11) is provided with a first plug (39) at a position corresponding to the first socket (40) and adapted to the first socket (40), the first plug (39) is connected to the button (19) and is inserted into or removed from the first socket (40) by the button (19).

4. The wrench according to claim 1, wherein the transmission member (18) comprises a cylinder (24), a knob (25) is disposed at the top end of the cylinder (24), a second pawl (26) and a third pawl (27) are crossly sleeved at the bottom end of the cylinder (24), a fixing rod (28) is connected to one side of the cylinder (24), a rotating rod (29) is fixed to the other side of the cylinder (24), a fixing groove (30) is disposed at one side of the handle portion (17) close to the transmission member (18), the fixing rod (28) is disposed in the fixing groove (30) and moves back and forth in the fixing groove (30) under the action of an external force, the rotating rod (29) is disposed between the second pawl (26) and the third pawl (27), and the second pawl (26) and the third pawl (27) are respectively engaged with the second ratchet wheel (8).

5. The wrench according to claim 1, wherein one end of the baffle (37) is hinged to a ring body (38), a lock catch (31) is arranged at the end of the ring body (38), and a lock head (32) matched with the lock catch (31) is arranged at the other end of the baffle (37).

6. A wrench as claimed in claim 1, wherein said first clamping portion (1) is provided with a first gripping surface (4) and a second gripping surface (5) movable inwardly.

7. A wrench as claimed in claim 6, wherein the connection ends of the first clamping surface (4), the second clamping surface (5) and the first clamping portion (1) are provided with a fourth spring (33) and an insert (34) connected with the fourth spring (33), one end of the insert (34) far away from the fourth spring (33) is provided with a smooth curved surface, and the first clamping portion (1) is provided with a plurality of third grooves (35) used in cooperation with the insert (34).

8. A wrench as claimed in any one of claims 1 to 7, wherein the first clamping part (1) and the second clamping part (2) are releasably connected.

9. A wrench as claimed in any one of claims 1 to 7, wherein said second clamping portion (2) and said retaining member (11) are each connected to said first clamping portion (1) by a third spring (36).

10. A wrench as claimed in any one of claims 1 to 7, wherein the first clamping portion (1) is provided with a pivot shaft (46), and the second clamping portion (2) is movably connected to the first clamping portion (1) via the pivot shaft (46).