wrench

Abstract

This application relates to the field of wrench technology and provides a wrench comprising: a handle, one end of which has a through-cavity, a wheel axle and a locking block within the cavity, a mutually cooperating guide structure between the wheel axle and the locking block, the wheel axle partially protruding from the cavity for connection with a socket; the locking block is connected to the handle and can rotate along the outer surface of the wheel axle via the guide structure, locking relative to the wheel axle when rotated to a first position or a second position; when the locking block is in the first or second position within the cavity, it drives the handle to reciprocate around the wheel axle, and the handle and locking block rotate synchronously relative to the wheel axle, thereby enabling the socket connected to the wheel axle to install or remove parts. The technical solution of this application is not limited by space and can adapt to even confined spaces, improving the wrench's adaptability.

Description

Technical Field

[0001] This application relates to the field of wrench technology, and more specifically, to a wrench. Background Technology

[0002] Existing ratchet and pawl wrenches typically consist of a ratchet and a set of pawls. During forward rotation, the drive pawl engages with the teeth of the ratchet, allowing it to rotate smoothly, while the check pawl slides on the back of the ratchet teeth. During reverse rotation, the check pawl prevents the ratchet from rotating counter-clockwise, while the drive pawl slides across the back of the ratchet teeth, keeping the ratchet stationary during reverse rotation. This unidirectional transmission capability makes ratchet and pawl wrenches widely used in various mechanical transmission devices.

[0003] However, existing ratchet designs require indexing, such as 72 or 36 teeth, with an angle of 5° or 10° between two teeth. However, when encountering some narrow spaces, the cantilever rotation angle of the wrench is small, and the pawl cannot be inserted from one tooth slot to the next adjacent tooth slot, making the wrench unusable in some narrow spaces. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a wrench that is not limited by space and can adapt to some narrow spaces, thereby improving the adaptability of the wrench.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] This application provides a wrench, comprising: a handle, one end of which has a through-cavity, the cavity containing an axle and a locking block, a cooperating guide structure between the axle and the locking block, the axle partially protruding from the cavity for connection with a sleeve; the locking block being connected to the handle, the locking block being able to rotate along the outer surface of the axle via the guide structure, and locking relative to the axle when rotated to a first position or a second position; when the locking block is in the first or second position within the cavity, it drives the handle to reciprocate about the axle as an axis, and the handle and the locking block rotate synchronously relative to the axle, so as to install or remove parts from the sleeve connected to the axle.

[0007] In one embodiment, the guide structure includes at least one annular groove disposed on the outer surface of the axle, and at least one protrusion disposed on the outer surface of the locking block that is inserted into the annular groove; or, the guide structure includes at least one protrusion disposed on the outer surface of the axle, and at least one annular groove disposed on the outer surface of the locking block into which the protrusion can be inserted.

[0008] In one embodiment, the locking block has a receiving space; the wrench also includes a toggle block and an elastic element, a portion of the elastic element is connected to the toggle block, the axis of the toggle block is perpendicular to the axis of the receiving space, and the other end of the elastic element abuts against the peripheral wall of the receiving space. When the toggle block is rotated relative to the locking block, the elastic element rotates synchronously with the toggle block, and the elastic force of the elastic element can drive the locking block to rotate in the cavity and rotate to a first position or a second position.

[0009] In one embodiment, the elastic element includes a first segment and a second segment, the first segment being used to connect with the actuating block, and the end of the second segment being used to abut against the locking block, with an obtuse angle between the first segment and the second segment.

[0010] In one embodiment, the chamber includes a first sidewall, which is an arc surface. The first sidewall contacts the body portion of the axle, and the arc length of the arc edge of the first sidewall is greater than half the circumference of the body portion of the axle.

[0011] In one embodiment, the chamber further includes a second sidewall connected to the first sidewall. The second sidewall encloses an active area where the locking block can rotate. When the locking block rotates to the first position or the second position, the peripheral wall of the locking block is in close contact with the second sidewall, so that the locking block and the wheel axle are relatively stationary.

[0012] In one embodiment, the wrench further includes a cover plate detachably connected to the handle for covering the opening of the chamber.

[0013] In one embodiment, the actuating block includes a plug-in portion and a rotatable portion, the plug-in portion being connected to the rotatable portion and the plug-in portion being inserted into the cover plate.

[0014] In one embodiment, the plug-in portion is provided with a first through hole, the rotatable portion is provided with a second through hole communicating with the first through hole, the radial dimension of the first segment is adapted to the diameter of the second through hole, and the second segment extends into the locking block within the first through hole.

[0015] In one implementation, the first through hole is coaxial with the accommodating space.

[0016] The technical solution of this application has the following effects:

[0017] A through-cavity is provided at one end of the handle, containing an axle and a locking block. A guide structure engages between the axle and the locking block. A portion of the axle protrudes from the cavity to connect with a sleeve. The locking block can rotate along the outer surface of the axle via the guide structure. When the locking block is in the first or second position within the cavity, it abuts against the handle, preventing further rotation. The locking block and the axle are also locked relative to each other via the guide structure. A sleeve is mounted on the axle and connected to a component. When the locking block is in the first position, it can drive the handle to swing about the axle towards the second position, and can also control the handle to swing back about the axle towards the first position, simultaneously causing the locking block to rotate synchronously relative to the axle. Friction exists between the sleeve and the component. During the swing-back process, the friction between the locking block and the axle is insufficient to rotate the axle, and the axle and the part remain relatively stationary. The locking block is still in the first position of the chamber. Therefore, the handle is continued to swing towards the second position with the axle as the axis. Through multiple operations, the part can be installed or removed through the sleeve on the axle. If the locking block is in the second position, the operation process is reversed. This eliminates the ratchet and pawl structure in the wrench of this application. When encountering some confined environments, the swing angle of the handle can be determined according to the operating environment. In the next operation of the handle, the axle can still apply a disassembly or installation force to the part, thus overcoming the predicament that ratchet and pawl wrenches cannot be used in some confined environments and improving the wrench's adaptability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a wrench without a cover plate provided in an embodiment of this application;

[0020] Figure 2 A cross-sectional view of the wrench provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the elastic element provided in the embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the axle structure provided in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the structure of the locking block provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the locking block in the first position provided in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the locking block in the second position according to an embodiment of this application.

[0026] Icons: 1-Axle; 11-Protrusion; 2-Locking block; 21-Annular groove; 22-Accommodation space; 3-Handle; 4-First sidewall; 5-Second sidewall; 6-Elastic element; 61-First section; 62-Second section; 7-Actuating block; 71-Insertion part; 72-Rotable part; 73-First through hole; 74-Second through hole; 8-Cover plate. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0028] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] like Figure 1 and 2 As shown in the illustration, this application provides a wrench including a handle 3. One end of the handle 3 has a through chamber, in which a wheel axle 1 and a locking block 2 are installed. A portion of the wheel axle 1 protrudes from the chamber and can be used for socket connection. In practical applications, one end of the socket directly contacts a part, such as a nut, bolt, or screw. A mutually cooperating guide structure is provided between the wheel axle 1 and the locking block 2. The locking block 2 can rotate relative to the wheel axle 1 along the outer surface of the wheel axle 1 through the guide structure. When it rotates to a first position or a second position within the chamber, the locking block 2 abuts against the handle 3, preventing further rotation. Simultaneously, the locking block 2 and the wheel axle 1 are locked relative to each other through the guide structure.

[0030] like Figure 6As shown, when the locking block 2 is in the first position, the locking block 2 is locked relative to the wheel axle 1, driving the handle 3 to rotate towards the second position. At this time, the handle 3 will swing about the wheel axle 1 as the axis towards the second position, that is, swing in a clockwise direction. The sleeve can then be used to install or remove parts. If the part is a nut, it can be tightened or loosened. After driving the handle 3 to swing once, the handle 3 can be controlled to swing back about the wheel axle 1 towards the first position. The handle 3 is connected to the locking block 2. During the swing back, the handle 3 and the locking block 2 simultaneously move relative to the wheel axle 1. When shaft 1 rotates, friction exists between the sleeve and the part due to their connection. The sleeve is coaxially connected to the wheel shaft 1. During the swing of the handle 3, the friction between the locking block 2 and the wheel shaft 1 is insufficient to drive the wheel shaft 1 to rotate, thus keeping the wheel shaft 1 stationary. The locking block 2 and the handle 3 rotate synchronously. After the handle 3 swings back a certain angle, the position of the locking block 2 is still the first position in the cavity. Therefore, the handle 3 is driven to swing towards the second position with the wheel shaft 1 as the axis. Through multiple operations, the part can be installed or removed through the sleeve on the wheel shaft 1.

[0031] like Figure 7 As shown, if the locking block 2 is in the second position, it drives the handle 3 to rotate towards the first position. At this time, the handle 3 will swing about the wheel axle 1 towards the first position, that is, swing in the counterclockwise direction. The sleeve can then install or remove the parts. The reciprocating swing process is the opposite of the operation process of the locking block 2 in the first position.

[0032] The wrench in this embodiment eliminates the ratchet and pawl structure. In some confined environments, the swing angle of the handle 3 can be determined according to the operating environment. Regardless of the swing angle, the wheel axle 1 can still apply disassembly or installation force to the part in the next operation of the handle 3, unaffected by the swing angle of the ratchet and pawl. This overcomes the predicament that ratchet and pawl wrenches cannot be used in some confined environments, and improves the wrench's adaptability.

[0033] Optionally, the connection can be direct or indirect; the locking block 2 and the handle 3 are connected indirectly.

[0034] like Figure 1 , 2As shown in Figure 6, taking the installation and removal of nuts as an example, when a nut needs to be installed, one end of the sleeve is connected to the nut, and the other end is connected to the axle 1. The locking block 2 is slid to the first position via the guide structure, preventing further rotation and locking the axle 1. At this point, the drive handle 3 moves towards the second position around the axle 1, i.e., clockwise. The axle 1 transmits the driving force to the sleeve, which then tightens the nut, achieving installation. Alternatively, in situations with limited operating space, the drive handle 3 can be rotated counterclockwise. Since the locking block 2 is connected to the handle 3, the handle 3 will cause the locking block 2 to rotate synchronously, and the nut... When the nut is tightened during the process of connecting with the sleeve and tightening the nut, the friction between the nut and the shaft at the installation position gradually increases. As a result, the axle 1, the sleeve, and the nut will remain relatively stationary. During the process of swinging the handle 3 back, the friction between the locking block 2 and the axle 1 is insufficient to drive the axle 1 to rotate. Therefore, the handle 3 and the locking block 2 rotate relative to the axle 1, while the handle 3 and the locking block 2 remain relatively stationary, keeping the locking block 2 in the first position in the chamber. Therefore, when the handle 3 swings back a certain angle and then continues to rotate towards the second position, the locking block 2 is still locked relative to the axle 1. The force of the axle 1 is transmitted to the sleeve, and then from the sleeve to the nut, thus tightening the nut.

[0035] like Figure 7As shown, when the nut needs to be removed, the locking block 2 is slid to the second position via the guide structure. The locking block 2 can no longer rotate, locking the axle 1. At this time, the drive handle 3 moves towards the first position with the axle 1 as the axis, that is, moves counterclockwise. The axle 1 transmits the driving force to the sleeve, which then loosens the nut, thus achieving removal. Of course, in cases where the operating space is limited, the drive handle 3 can be rotated clockwise. Since the locking block 2 is connected to the handle 3, the handle 3 will drive the locking block 2 to rotate synchronously. And since the nut is connected to the sleeve, during the loosening of the nut, the friction between the nut and the shaft at the installation position gradually decreases. However, before the nut is completely removed, the axle 1, the sleeve, and the nut remain relatively stationary. During the swinging of the handle 3, the locking block 2... The friction between the handle 3 and the axle 1 is insufficient to rotate the axle 1. Therefore, the handle 3 and the locking block 2 rotate relative to the axle 1, while the handle 3 and the locking block 2 remain relatively stationary, keeping the locking block 2 in the second position within the chamber. Thus, when the handle 3 swings back a certain angle and then continues to rotate towards the first position, the locking block 2 remains locked relative to the axle 1. The force of the axle 1 is transmitted to the sleeve, and then from the sleeve to the nut, loosening the nut and thus disassembling it. Of course, if the locking block 2 can rotate the axle 1 together during the swinging process, it indicates that the friction between the nut and the shaft at the installation position is small and less than the friction between the locking block 2 and the axle 1. In this case, the nut does not require a wrench and can be disassembled manually.

[0036] Optionally, in practical applications, the parts to be installed and removed can be matched according to the actual selected sleeve.

[0037] Optionally, the contact surfaces between the locking block 2 and the axle 1 can be smoothly polished to reduce the friction between them, making it easier for the locking block 2 to rotate relative to the axle 1, improving the convenience of operation, and preventing the situation where, when the nut is loosened, the friction between the nut and the sleeve is small, while the friction between the locking block 2 and the axle 1 is greater than that between the nut and the sleeve. During the swing-back process, the locking block 2 will drive the axle 1 to rotate, and the handle 3 will not be able to loosen the nut again. Reducing the friction between the locking block 2 and the axle 1 will allow the handle 3 to loosen the nut as many times as possible, reducing the number of times the nut needs to be manually removed. Of course, the parts to be removed are not limited to the nut and can also be other parts.

[0038] Optionally, one end of the handle 3 is a handle, which makes it easier for the operator to operate.

[0039] Optionally, one end of the sleeve can be in the shape of a straight line, a cross, or a star shape, or other patterns; of course, one end of the sleeve can also be a hollow internal hexagonal socket; one end of the sleeve can also be equipped with a screwdriver head connector, etc.; the end of the wheel axle 1 connected to the sleeve can be equipped with elastic balls for connecting with the sleeve.

[0040] like Figure 2 , 4 As shown in Figure 5, in one embodiment, the guide structure includes at least one annular groove 21 disposed on the outer surface of the axle 1, and at least one protrusion 11 disposed on the outer surface of the locking block 2 that inserts into the annular groove 21. By providing the annular groove 21 and the protrusion 11, the locking block 2 can slide horizontally along the axle 1, and it is convenient for the locking block 2 to lock relative to the axle 1. Of course, the positions of the annular groove 21 and the protrusion can also be reversed, that is, at least one protrusion 11 on the outer surface of the axle 1 and at least one annular groove 21 on the outer surface of the locking block 2 into which the protrusion 11 can be inserted.

[0041] Optionally, the number of annular grooves 21 can be two or more, thereby ensuring the stability between the locking block 2 and the wheel axle 1.

[0042] Optionally, the annular groove 21 can be a V-shaped groove or a circular arc groove.

[0043] like Figure 1 , 2 As shown in Figures 6 and 7, in one embodiment, the locking block 2 is provided with a receiving space 22; the wrench also includes a toggle block 7 and an elastic element 6. A portion of the elastic element 6 is connected to the toggle block 7, and the axis of the toggle block 7 is perpendicular to the axis of the receiving space 22, thereby making the elastic element 6 have a curved structure, and the other end can always abut against the peripheral wall of the receiving space 22. When the toggle block 7 rotates relative to the locking block 2, the elastic element 6 rotates synchronously. The elastic force of the elastic element 6 can drive the locking block 2 to rotate in the cavity, and the toggle block 7 can make the locking block 2 reciprocate between the first position and the second position by toggle clockwise or counterclockwise. After rotation, the elastic force provided by the elastic element 6 to the locking block 2 can make the locking block 2 fit tightly with the wheel axle 1, preventing the locking block 2 from shaking.

[0044] Optionally, the receiving space 22 can be a through hole or a groove, and the cross-section of the receiving space 22 is elliptical or elongated, so that when the elastic element 6 rotates, it can push the locking block 2 to rotate.

[0045] Optionally, during the disassembly process, if the axle 1 and locking block 2 rotate synchronously during the swing of the handle 3, it indicates that the friction between the part and the connection point is less than the tight-fitting force provided by the elastic element 6 between the locking block 2 and the axle 1. In this case, the part does not need to be disassembled with a wrench and can be disassembled manually. During the installation process, as the friction between the part and the connection point gradually increases, the tight-fitting force provided by the elastic element 6 between the locking block 2 and the axle 1 cannot cause the axle 1 to rotate. Furthermore, the elastic force provided by the elastic element 6 to the locking block 2 ensures that the locking block 2 remains tightly fitted to the side wall of the chamber. Therefore, when the handle 3 swings back, it can also drive the locking block 2 to rotate synchronously.

[0046] Optionally, to avoid insufficient elastic support for the locking block 2 after long-term use of the elastic element 6, shape memory alloy or other raw materials with good alloy structural strength can be selected to make the elastic element 6.

[0047] like Figure 2 and 3 As shown, in one embodiment, the elastic member 6 includes a first segment 61 and a second segment 62. The first segment 61 is used to connect with the actuating block 7, and the end of the second segment 62 is used to abut against the locking block 2. The first segment 61 and the second segment 62 form an obtuse angle. Since the axes between the actuating block 7 and the locking block 2 are perpendicular to each other, the first segment 61 and the second segment 62 are set at an obtuse angle when not installed. That is, the elastic member 6 is at an obtuse angle in the initial state. After the elastic member 6 is connected to the actuating block 7 and the locking block 2 respectively, the second segment 62 can provide the locking block 2 with the abutting force to increase the angle between it and the first segment 61. When the locking block 2 is in the initial position, the abutting force can keep the locking block 2 in close contact with the wheel axle 1. When the locking block 2 is driven to rotate by the actuating block 7, the abutting force can drive the locking block 2 to rotate circumferentially along the wheel axle 1. In the first position or the second position, the abutting force can keep the locking block 2 in close contact with the corresponding chamber sidewall.

[0048] Optionally, the end of the second segment 62 can be configured as a ring or a square, so that at least two sides of the end of the second segment 62 can abut against the side wall of the receiving space 22 in the initial position, thereby increasing the contact area with the locking block 2.

[0049] like Figure 1 As shown, in one embodiment, the chamber includes a first sidewall 4, which is an arc surface. The first sidewall 4 contacts the body of the axle 1. The arc length of the arc edge of the first sidewall 4 is greater than half the circumference of the body of the axle 1, so that the first sidewall 4 contacts most of the body of the axle 1. The first sidewall 4 encircles the axle 1, which plays a limiting role in the axle 1 and prevents the axle 1 from moving inside the chamber.

[0050] Optionally, the axle 1 includes a body and a protruding connecting part, wherein the body is provided with an annular groove 21 or a protrusion 11, and the connecting part is provided with a square cavity for connecting with the sleeve.

[0051] Optionally, the first sidewall 4 includes two arc-shaped edges and two vertical edges, wherein the length of the two arc-shaped edges is greater than half the circumference of the body of the axle 1, so that the two vertical edges of the first sidewall 4 can limit the axle 1 and prevent the axle 1 from moving inside the cavity, thereby improving the stability of the structure.

[0052] like Figure 1 As shown, in one embodiment, the chamber also includes a second sidewall 5 connected to the first sidewall 4. The second sidewall 5 encloses an active area where the locking block 2 can rotate. When the locking block 2 rotates to the first position or the second position, the peripheral wall of the locking block 2 is tightly fitted with the second sidewall 5 so that the locking block 2 and the wheel axle 1 are relatively stationary. When the locking block 2 is in the first position or the second position, the opposite force is applied to the handle 3, the locking block 2 is locked to the wheel axle 1, and the second sidewall 5 continues to press against the locking block 2, so the locking block 2 cannot rotate. The force applied to the handle 3 can be transmitted to the sleeve to disassemble or install the parts, thereby realizing the disassembly or installation of the parts.

[0053] Optionally, the second sidewall 5 can be an arc surface, and the outer surface of the locking block 2 facing the second sidewall 5 can also be an arc surface. The diameter of the circle corresponding to the second sidewall 5 is the first diameter, and the diameter corresponding to the locking block 2 is the second diameter. The first diameter is larger than the second diameter, and the center of the circle corresponding to the outer surface of the locking block 2 facing the second sidewall 5 is closer to the handle of the rotary handle 3 than the center of the circle corresponding to the second sidewall 5. This allows the locking block 2 to fit tightly against the second sidewall 5 within a small range of movement in the active area, facilitating the elastic element 6 and the actuating block 7 to drive the locking block 2 to lock with the wheel axle 1.

[0054] Optionally, in some cases, the second sidewall 5 may also be an inclined slope, and the outer surface of the locking block 2 facing the second sidewall 5 may also be an inclined surface.

[0055] like Figure 2 As shown, in one embodiment, the wrench also includes a cover plate 8, which is detachably connected to the handle 3 and is used to cover the opening of the chamber, thereby preventing the locking block 2 and the axle 1 from falling out of the chamber.

[0056] Optionally, the cover plate 8 and the handle 3 can be connected by bolts.

[0057] like Figure 2As shown, in one embodiment, the actuating block 7 includes a plug-in part 71 and a rotatable part 72. The plug-in part 71 is connected to the rotatable part 72. The plug-in part 71 is inserted into the cover plate 8, thereby realizing the connection between the cover plate 8 and the actuating block 7. When the handle 3 is rotated under force, it can rotate simultaneously with the actuating block 7.

[0058] Optionally, the plug-in part 71 is connected to the cover plate 8 by a snap ring, and the rotatable part 72 allows the operator to easily drive the toggle block 7 to rotate.

[0059] Optionally, the insertion part 71 is arranged perpendicularly to the rotatable part 72, so that the elastic member 6 can bend at the insertion part 71 and the position connected to the rotatable part 72, providing a resisting force to the locking block 2.

[0060] like Figure 2 As shown, in one embodiment, the insertion part 71 is provided with a first through hole 73, and the rotatable part 72 is provided with a second through hole 74 communicating with the first through hole 73. The radial dimension of the first segment 61 is adapted to the diameter of the second through hole 74, so that the second through hole 74 can clamp the elastic member 6, thereby improving the stability between the elastic member 6 and the actuating block 7. The second segment 62 extends into the locking block 2 within the first through hole 73, thereby abutting against the locking block 2.

[0061] Optionally, the radial dimension of the first through hole 73 is larger than the radial dimension of the second through hole 74. On the one hand, this facilitates the insertion of the first segment 61 into the second through hole 74; on the other hand, it also avoids affecting the actual bending deformation force of the first segment 61 and the second segment 62 during the installation process.

[0062] In one implementation, the first through hole 73 is coaxial with the receiving space 22, and the second segment 62 can be inserted into the receiving space 22 for easy installation.

[0063] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A wrench, characterized in that, include: A handle has a through-cavity at one end, a wheel axle and a locking block inside the cavity, a guide structure that cooperates between the wheel axle and the locking block, and a portion of the wheel axle protruding from the cavity for connection with a sleeve; the locking block is connected to the handle and can rotate along the outer surface of the wheel axle through the guide structure, and locks against the wheel axle when rotated to a first position or a second position; When the locking block is in the first or second position in the cavity, the rotating handle is driven to swing back and forth around the wheel axle, and the rotating handle and the locking block rotate synchronously relative to the wheel axle, so as to install or remove parts from the sleeve connected to the wheel axle; The locking block has a receiving space; The wrench further includes an actuating block and an elastic element. A portion of the elastic element is connected to the actuating block. The axis of the actuating block is perpendicular to the axis of the receiving space. The other end of the elastic element abuts against the peripheral wall of the receiving space. The actuating block is rotated relative to the locking block, and the elastic element rotates synchronously with the actuating block. The elastic force of the elastic element can drive the locking block to rotate in the cavity and rotate to a first position or a second position. The elastic element includes a first segment and a second segment. The first segment is used to connect with the actuating block, and the end of the second segment is used to abut against the locking block. The first segment and the second segment form an obtuse angle. The chamber includes a first sidewall, which is an arc surface. The first sidewall contacts the main body of the axle, and the arc length of the arc edge of the first sidewall is greater than half the circumference of the main body of the axle. The chamber also includes a second sidewall connected to the first sidewall. The second sidewall encloses an active area where the locking block can rotate. When the locking block rotates to the first position or the second position, the peripheral wall of the locking block is tightly fitted with the second sidewall so that the locking block and the wheel axle are relatively stationary.

2. The wrench according to claim 1, characterized in that, The guide structure includes at least one annular groove disposed on the outer surface of the wheel axle, and at least one protrusion disposed on the outer surface of the locking block and inserted into the annular groove, or; The guide structure includes at least one protrusion disposed on the outer surface of the axle, and at least one annular groove disposed on the outer surface of the locking block into which the protrusion can be inserted.

3. The wrench according to claim 1, characterized in that, The wrench also includes a cover plate, which is detachably connected to the handle and is used to cover the opening of the chamber.

4. The wrench according to claim 3, characterized in that, The actuating block includes a plug-in portion and a rotatable portion, the plug-in portion being connected to the rotatable portion and the plug-in portion being inserted into the cover plate.

5. The wrench according to claim 4, characterized in that, The plug-in portion is provided with a first through hole, and the rotatable portion is provided with a second through hole communicating with the first through hole. The radial dimension of the first segment is adapted to the diameter of the second through hole, and the second segment extends into the locking block within the first through hole.

6. The wrench according to claim 5, characterized in that, The first through hole is coaxial with the accommodating space.

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