Wrench

Abstract

The utility model discloses a wrench which comprises a wrench head, a clamping groove, a connecting rod, a connecting rod, a connecting rod, a connecting rod and a connecting rod, and one end of the wrench head is provided with a clamping groove for clamping with a threaded part; a handle; the handle is connected with the other end of the wrench head through the one-way limiting mechanism, and the one-way limiting mechanism is used for limiting one-way rotation of the handle relative to the wrench head. According to the wrench, the wrench head of the wrench is rotationally connected with the handle, and the wrench head and the handle are connected through the one-way limiting mechanism, so that the wrench head and the handle can rotate in a one-way mode. By means of one-way limiting of the one-way limiting mechanism, force application of the wrench to a threaded part can be guaranteed, and by means of one-way rotation of the one-way limiting mechanism, the included angle between the handle and the wrench head can be changed, so that the wrench adapts to different installation spaces, the rotation range of the wrench is enlarged, and the disassembly and assembly difficulty of the threaded part at the space limited position is lowered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tooling, and particularly relates to a wrench. BACKGROUND

[0002] At present, the installation space of some to-be-assembled components is limited, so that when the to-be-assembled components are connected by using threaded parts, the rotation space of a wrench used for tightening the threaded parts is small or even cannot be effectively rotated, so that the disassembly process of the threaded parts is difficult.

[0003] Therefore, how to provide a wrench capable of adapting to the installation space and reducing the disassembly difficulty of the threaded parts is a technical problem to be solved by the person skilled in the art.

[0004] CONTENT

[0005] In view of the above problems, the present application provides a wrench capable of adapting to the installation space and reducing the disassembly difficulty of the threaded parts.

[0006] The specific scheme is as follows:

[0007] The first aspect of the present application provides a wrench, which comprises: a wrench head, one end of the wrench head is provided with a clamping groove used for clamping a threaded part; a handle; and a one-way limiting mechanism, the handle and the other end of the wrench head are connected through the one-way limiting mechanism, and the one-way limiting mechanism is used for limiting the one-way rotation of the handle relative to the wrench head.

[0008] In a possible implementation, the wrench described above, the one-way limiting mechanism comprises: a first one-way limiting mechanism, the first one-way limiting mechanism has a first limiting state capable of limiting the rotation of the handle relative to the wrench head in a first direction, and a first release state releasing the limiting of the handle relative to the wrench head in the first direction; and a second one-way limiting mechanism, the second one-way limiting mechanism has a second limiting state capable of limiting the rotation of the handle relative to the wrench head in a second direction, and a second release state releasing the limiting of the handle relative to the wrench head in the second direction, the first direction is opposite to the second direction, and when the first one-way limiting mechanism is in the first limiting state, the second one-way limiting mechanism is in the second release state; when the second one-way limiting mechanism is in the second limiting state, the first one-way limiting mechanism is in the first release state.

[0009] In a possible implementation, the wrench provided above, the first one-way limiting mechanism comprises: a first ratchet wheel and a first pawl, the first ratchet wheel and the first pawl are limited in position along the first direction, and one of the first ratchet wheel and the first pawl is arranged on the handle, and the other is arranged on the wrench head; a first adjusting member is installed on the handle or the wrench head, the first adjusting member is used to adjust the position of the first pawl relative to the first ratchet wheel, and the first adjusting member adjusts the first pawl to separate from the first ratchet wheel, and the first one-way limiting mechanism is in the first released state.

[0010] In a possible implementation, the wrench provided above, the first ratchet wheel is arranged on the handle; one end of the first pawl is rotatably arranged on the wrench head, and the other end of the first pawl is used to abut against the first ratchet wheel to limit the position; the first adjusting member is used to abut against the first pawl and drive the first pawl to rotate, so that the first pawl separates from the first ratchet wheel.

[0011] In a possible implementation, the wrench provided above, the first adjusting member comprises: a first eccentric cam, the first eccentric cam is hinged to the wrench head, and the first eccentric cam abuts against the first pawl and drives the first pawl to rotate.

[0012] In a possible implementation, the wrench provided above, the second one-way limiting mechanism comprises: a second ratchet wheel and a second pawl, the second ratchet wheel and the second pawl are limited in position along the second direction, and one of the second ratchet wheel and the second pawl is arranged on the handle, and the other is arranged on the wrench head; a second adjusting member is used to adjust the position of the second pawl relative to the second ratchet wheel, and the second adjusting member adjusts the second pawl to separate from the second ratchet wheel, and the second one-way limiting mechanism is in the second released state.

[0013] In a possible implementation, the wrench provided above, the second ratchet wheel is arranged on the handle; one end of the second pawl is rotatably arranged on the wrench head, and the other end of the second pawl is used to abut against the second ratchet wheel to limit the position; the second adjusting member is installed on the handle or the wrench head, the second adjusting member is used to abut against the second pawl and drive the second pawl to rotate, so that the second pawl separates from the second ratchet wheel.

[0014] In a possible implementation, the wrench provided above, the second adjusting member comprises: a second eccentric cam, the second eccentric cam is hinged to the wrench head, and the second eccentric cam abuts against the second pawl and drives the second pawl to rotate.

[0015] In a possible implementation, the wrench provided in the above solution, the first ratchet and the second ratchet are integrally formed and symmetrical about the line connecting the wrench head and the handle; the first pawl and the second pawl are symmetrically arranged about the line connecting the wrench head and the handle.

[0016] In a possible implementation, the wrench provided in the above solution, the first recessed area is located at the end of the handle close to the wrench head, and the second recessed area is located at the end of the wrench head close to the handle, the first recessed area and the second recessed area are overlapped and connected by a hinge; the one-way limiting mechanism is arranged at the overlapped position of the handle and the wrench head.

[0017] By means of the above technical solution, the wrench provided in the present application is characterized in that the wrench head and the handle are rotationally connected, and the two are connected by a one-way limiting mechanism, so that the wrench head and the handle can rotate in one direction. The one-way limiting of the one-way limiting mechanism can ensure that the wrench exerts force on the threaded part, and the one-way rotation of the one-way limiting mechanism can change the included angle between the handle and the wrench head, so that the wrench can adapt to different installation spaces, increase the range of rotation of the wrench, and thus reduce the difficulty of disassembling the threaded part in a space-limited place. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other features, advantages, and aspects of the present disclosure will become more apparent by referring to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, like or similar reference numerals are used to refer to like or similar elements throughout the various figures. It should be understood that the drawings are diagrammatic and schematic representation of elements and features do not necessarily depict the actual scale or proportions.

[0019] Figure 1 A use state diagram of the wrench provided in the present application is shown in the following figure;

[0020] Figure 2 A structure schematic diagram of the wrench provided in the present application is shown in the following figure;

[0021] Figure 3 A split diagram of the wrench provided in the present application is shown in the following figure;

[0022] Figure 4 A bottom view of the wrench provided in the present application is shown in the following figure;

[0023] Figure 5 A bottom view of the wrench provided in the present application is shown in the following figure;

[0024] Figure 6 A structure schematic diagram of the wrench head and the one-way limiting mechanism in the bottom view provided in the present application is shown in the following figure;

[0025] Figure 7 A structure schematic diagram of the wrench head in the bottom view provided in the present application is shown in the following figure;

[0026] Figure 8 This is a schematic diagram of the structure of the first adjusting member provided in an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of the structure of the first pawl provided in an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the handle provided in an embodiment of this application;

[0029] Figure 11 A diagram illustrating the working process of a wrench provided in an embodiment of this application. Detailed Implementation

[0030] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0031] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0032] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0033] Currently, mechanical structures are mostly assembled using threaded connections, such as bolts and nuts to lock two components together. Specialized tools are required for tightening these threaded connections; for example, a wrench. The tightening and loosening of the threaded connections is achieved by rotating the wrench.

[0034] However, due to the limited installation space of some components to be assembled, the wrench has little room to rotate or cannot rotate effectively, making the disassembly and assembly of threaded parts difficult.

[0035] Based on this, such as Figure 1 As shown in the embodiments of this application, a wrench is disclosed to accommodate the installation of threaded parts in situations where installation space is limited. Figure 1The wrench 1 in the figure comprises a handle 10 and a wrench head 20.

[0036] The handle 10 is a position for an operator to hold, and the shape, size and material of the handle 10 can be set according to different needs. The wrench head 20 has a clamping groove at one end for clamping with the outer contour of a threaded part, and the shape of the clamping groove is adapted to the outer contour of a hexagonal nut, for example.

[0037] The other end of the wrench head 20 is rotatably connected to the handle 10, and the wrench head 20 is hingedly connected to the handle 10, so that the handle 10 can rotate relative to the wrench head 20, thereby changing the position of the handle 10 to adapt to the installation of the threaded part of the component 2 to be assembled.

[0038] The specific structure of the wrench 1 will be described below. Figures 2 to 8

[0039] As shown in the figure, the wrench 1 further comprises a one-way limiting mechanism 30. Figures 2 to 5

[0040] The one-way limiting mechanism 30 is a mechanism for limiting rotation in one direction, and the wrench head 20 and the handle 10 are connected by the one-way limiting mechanism 30, and the one-way limiting mechanism 30 is used to limit the one-way rotation of the handle 10 relative to the wrench head 20.

[0041] By providing the one-way limiting mechanism 30, the included angle between the handle 10 and the wrench head 20 can be changed to adapt to the needs of different installation spaces. The one-way limiting of the one-way limiting mechanism 30 can prevent the handle 10 from rotating in the opposite direction relative to the wrench head 20, thereby avoiding the wrench 1 from being reversed due to force during use and affecting the locking of the threaded part.

[0042] In this application, the wrench head 20 and the handle 10 of the wrench 1 are rotatably connected, and the two are connected by the one-way limiting mechanism 30, so that the wrench head 20 and the handle 10 can rotate in one direction. The one-way limiting of the one-way limiting mechanism 30 can ensure the force applied by the wrench 1 to the threaded part, and the one-way rotation of the one-way limiting mechanism 30 can change the included angle between the handle 10 and the wrench head 20, so that the wrench can adapt to different installation spaces, increase the range of rotation of the wrench, and thus reduce the difficulty of disassembling the threaded part in a limited space.

[0043] In some embodiments, the one-way limiting mechanism 30 comprises a first one-way limiting mechanism 301 and a second one-way limiting mechanism 302.

[0044] The first one-way limiting mechanism 301 can limit the rotation of the handle 10 relative to the wrench head 20 in a first direction, and the second one-way limiting mechanism 302 can limit the rotation of the handle 10 relative to the wrench head 20 in a second direction, and the first direction and the second direction are opposite, for example, the first direction can be clockwise and the second direction can be counterclockwise.​​

[0045] The first one-way limiting mechanism 301 and the second one-way limiting mechanism 302 each have two states.

[0046] The first one-way limiting mechanism 301 includes a first limiting state and a first releasing state. The first limiting state is a state in which the handle 10 is limited to rotate relative to the wrench head 20 in the first direction, and the handle 10 can rotate relative to the wrench head 20 in the second direction; the first releasing state is a state in which the handle 10 can rotate relative to the wrench head 20 in both the first direction and the second direction, i.e., the handle 10 is released from the limitation of rotating relative to the wrench head 20 in the first direction.

[0047] The second one-way limiting mechanism 302 includes a second limiting state and a second releasing state. The second limiting state is a state in which the handle 10 is limited to rotate relative to the wrench head 20 in the second direction, and the handle 10 can rotate relative to the wrench head 20 in the first direction; the second releasing state is a state in which the handle 10 can rotate relative to the wrench head 20 in both the first direction and the second direction, i.e., the handle 10 is released from the limitation of rotating relative to the wrench head 20 in the second direction.

[0048] It should be noted that during the application of the wrench 1, when the first one-way limiting mechanism 301 is in the first limiting state, the second one-way limiting mechanism 302 is in the second releasing state; when the first one-way limiting mechanism 301 is in the first releasing state, the second one-way limiting mechanism 302 is in the second limiting state.

[0049] Specifically, during the operation of the wrench 1, when the first one-way limiting mechanism 301 is in the first limiting state and the second one-way limiting mechanism 302 is in the second releasing state, the second one-way limiting mechanism 302 does not work, and the handle 10 can only rotate relative to the wrench head 20 in the second direction; when the first one-way limiting mechanism 301 is in the first releasing state and the second one-way limiting mechanism 302 is in the second limiting state, the first one-way limiting mechanism 301 does not work, and the handle 10 can only rotate relative to the wrench head 20 in the first direction.

[0050] The wrench 1 in the present application can realize that the handle 10 rotates relative to the wrench head 20 only in the first direction and only in the second direction by setting the first one-way limiting mechanism 301 and the second one-way limiting mechanism 302, i.e., the direction of the handle 10 relative to the wrench head limiting rotation is increased, thereby increasing the application range of the wrench 1.

[0051] The specific structure of the wrench head 20, the one-way limiting mechanism 30, and the handle 10 will be described below. Figures 3 to 9

[0052] ​In some embodiments, the first one-way limiting mechanism 301 comprises a first ratchet (not shown in the figure), a first pawl 3012 and a first adjusting member 3011.

[0053] The first ratchet is engaged with the first pawl 3012, and the first pawl 3012 limits the rotation of the first ratchet in the first direction. One of the first ratchet and the first pawl 3012 is arranged on the handle 10, and the other is arranged on the wrench head 20. The first ratchet and the first pawl 3012 are limited and matched to realize the connection of the handle 10 and the wrench head 20 in the first direction.

[0054] In optional embodiments, the first ratchet is arranged on the handle 10, and the first ratchet has inclined teeth. The inclined direction of the inclined teeth of the first ratchet is directed to the second direction, i.e., the first pawl 3012 can rotate relative to the first ratchet in the second direction. The first pawl 3012 is rotatably arranged on the wrench head 20, and the first pawl 3012 is matched with the inclined teeth of the first ratchet.

[0055] In other embodiments, the positions of the first ratchet and the first pawl 3012 can be interchanged, as long as the one-way limiting mode of the ratchet and pawl is adopted.

[0056] The first one-way limiting mechanism 301 in the present application realizes the one-way limiting function by the matching structure of the ratchet and pawl, has simple structure, good stability, is easy to process, and has low cost.

[0057] In some embodiments, the first adjusting member 3011 is rotatably installed on the wrench head 20, and the first adjusting member 3011 abuts against the first pawl 3012. During the rotation of the first adjusting member 3011, the first adjusting member 3011 can drive the first pawl 3012 to rotate, so that the first pawl 3012 is separated from the first ratchet, so that the first one-way limiting mechanism 301 is in the first release state.

[0058] The first adjusting member 3011 in the present application is used to adjust the position of the first pawl 3012 relative to the first ratchet, so as to realize the limiting and separating of the first pawl 3012 and the first ratchet, and further realize the switching of the first one-way limiting mechanism 301 between the first limiting state and the first release state.

[0059] The specific structure of the first adjusting member 3011 can be arranged according to different needs, including but not limited to the disclosed structure in the embodiments of the present application. Figure 8

[0060] As Figure 6 ​As shown, the first one-way limiting mechanism 301 further comprises a first spring 3013, which is arranged between the first pawl 3012 and the side wall of the wrench head 20 and within the rotation range of the first pawl 3012. The first spring 3013 is used to abut against the first pawl 3012 to generate a reset force for the movement of the first pawl 3012 relative to the first ratchet wheel.

[0061] By arranging the first spring 3013, the first pawl 3012 can stably engage with the first ratchet wheel during the rotation of the first pawl 3012 relative to the first ratchet wheel, and the problem of tooth skipping can be prevented.

[0062] The above discloses a specific structure of the first one-way limiting mechanism 301. In combination with Figure 4 and Figure 5 It can be known that the structure of the second one-way limiting mechanism 302 is the same as that of the first one-way limiting mechanism 301, and the second one-way limiting mechanism 302 comprises a second ratchet wheel (not marked in the figure), a second pawl 3022, a second adjusting member 3021 and a second spring 3023.

[0063] The difference between the second one-way limiting mechanism 302 and the first one-way limiting mechanism 301 lies in that the limiting direction of the second ratchet wheel and the second pawl 3022 is the second direction.

[0064] The connection relationship of the second ratchet wheel, the second pawl 3022, the second adjusting member 3021 and the second spring 3023 can be known from the above content, and will not be described one by one here. In some embodiments, the first ratchet wheel and the second ratchet wheel are integrated into one, forming a ratchet wheel 303 near one end of the handle 10 along the width direction of the handle 10, the ratchet wheel 303 being an arc-shaped structure extending along the width direction of the handle 10, and the second pawl 3022 and the first pawl 3012 being arranged along the width direction of the handle 10, the width direction in the present application being the direction perpendicular to the arrangement direction of the handle 10 and the wrench head 20.

[0065] In the present application, by arranging the first one-way limiting mechanism 301 and the second one-way limiting mechanism 302 as the same structure, the structure can be simplified and the cost can be reduced.

[0066] In combination with Figure 8 As shown, the first adjusting member 3011 in some embodiments comprises a first eccentric cam 30111, a first rotating shaft 30112 and a first lever 30113.

[0067] The first eccentric cam 30111 is eccentrically sleeved on the first rotating shaft 30112, and the first rotating shaft 30112 can drive the first eccentric cam 30111 to rotate synchronously in the rotating process of the first rotating shaft 30112. The first eccentric cam 30111 abuts against the first pawl 3012, and the rotation of the first eccentric cam 30111 drives the rotation of the first pawl 3012.

[0068] The first rotating shaft 30112 is rotatably connected with the wrench head 20, and the first eccentric cam 30111 is eccentrically sleeved on the first rotating shaft 30112. The first rotating shaft 30112 can drive the first eccentric cam 30111 to rotate synchronously in the rotating process of the first rotating shaft 30112.

[0069] The first eccentric cam 30111 is eccentrically sleeved on the first rotating shaft 30112, and the first rotating shaft 30112 can drive the first eccentric cam 30111 to rotate synchronously in the rotating process of the first rotating shaft 30112. The first eccentric cam 30111 abuts against the first pawl 3012, and the rotation of the first eccentric cam 30111 drives the rotation of the first pawl 3012.

[0070] The first eccentric cam 30111 is eccentrically sleeved on the first rotating shaft 30112, and the first rotating shaft 30112 can drive the first eccentric cam 30111 to rotate synchronously in the rotating process of the first rotating shaft 30112. The first eccentric cam 30111 abuts against the first pawl 3012, and the rotation of the first eccentric cam 30111 drives the rotation of the first pawl 3012.

[0071] It should be noted that the second adjusting member 3021 includes a second eccentric cam, a second rotating shaft and a second rotating lever, and the structure and connection relationship of the second adjusting member 3021 are the same as those of the first adjusting member 3011, which will not be described herein.

[0072] As shown in Figure 9 The first pawl 3012 and the second pawl 3022 each include a pawl body 30121 and a connecting shaft 30122.

[0073] The connecting shaft 30122 is fixedly connected with the pawl body 30121, and is integrally formed with the pawl body 30121 in an example. The connecting shaft 30122 is arranged at one end of the pawl body 30121, and the other end of the pawl body 30121 is used for limiting cooperation with the first ratchet wheel. The pawl body 30121 is rotatably mounted on the wrench head 20 through the connecting shaft 30122.

[0074] As shown in Figure 7 The first recessed area 201 has a thickness smaller than that of other positions of the wrench head 20.

[0075] As shown in Figure 10As shown, the handle 10 comprises a handle body 101 and a second recessed area 102, wherein the thickness of the second recessed area 102 is less than the thickness of the handle body 101.

[0076] In combination Figure 3 As can be seen, the second recessed area 102 of the handle 10 is overlapped with the first recessed area 201 of the wrench head 20, so as to realize the overlapped cooperation of the handle 10 and the wrench head 20. In some embodiments, the first recessed area 201 is hingedly connected with the second recessed area 102.

[0077] In some embodiments, the first recessed area 201 has a first mounting hole 204 and a second mounting hole (not shown in the figure), a first assembly hole 205 and a second assembly hole 206, a first limiting hole 203 and a second limiting hole (not shown in the figure), and a first connecting hole 202. The first limiting hole 203 and the second limiting hole are located on the side wall of the first recessed area 201 of the wrench head 20.

[0078] The second recessed area 102 of the handle 10 has a second connecting hole 1022.

[0079] In combination with the above structure, during the assembly of the wrench 1, the connecting shaft 30122 of the first pawl 3012 is rotatably installed in the first mounting hole 204, and the connecting shaft 30122 of the second pawl 3022 is rotatably installed in the second mounting hole. The first rotating shaft 30112 of the first adjusting member 3011 penetrates through the first assembly hole 205, and the first eccentric cam 30111 is located in the first recessed area 201, and the first lever 30113 is exposed. The second adjusting member 3021 is assembled in the second assembly hole 206. The first spring 3013 is limited between the first limiting hole 203 and the first pawl 3012, and the second spring 3023 is limited between the second limiting hole and the second pawl 3022. The second connecting hole 1022 of the handle 10 is opposite to the first connecting hole 202 of the wrench head 20, and is hingedly connected through a hinge member.

[0080] In some embodiments, the first one-way limiting mechanism 301 and the second one-way limiting mechanism 302 are symmetrically arranged with respect to the axial direction of the wrench 1 (the arrangement direction of the handle 10 and the wrench head 20).

[0081] For example, the ratchet wheel 303 is symmetrically arranged with respect to the arrangement direction of the handle 10 and the wrench head 20, the first pawl 3012 and the second pawl 3022 are symmetrically arranged with respect to the arrangement direction of the handle 10 and the wrench head 20, the first spring 3013 and the second spring 3023 are symmetrically arranged with respect to the arrangement direction of the handle 10 and the wrench head 20, and the second adjusting member 3021 and the first adjusting member 3011 are symmetrically arranged with respect to the arrangement direction of the handle 10 and the wrench head 20.

[0082] The symmetric arrangement facilitates the arrangement of the first one-way limiting mechanism 301 and the second one-way limiting mechanism 302 and facilitates the use of the wrench 1 by the operator.

[0083] In combination Figure 11 as shown, Figure 11 In the embodiment, the gap between the to-be-assembled part 2 and the shielding piece 3 is small, and the ordinary wrench 1 cannot effectively rotate to assemble the threaded part of the to-be-assembled part 2. However, by adjusting the included angle between the handle 10 and the wrench head 20, the position of the handle 10 relative to the gap between the to-be-assembled part 2 and the shielding piece 3 is changed, so that the rotation range of the wrench 1 is increased, i.e., from Figure 11 In the embodiment, the change of the rotation position of the wrench 1 shown in (a) to (c) is achieved, so that the installation of the threaded part with limited installation space is completed. Figure 11

[0084] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0085] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.​

Claims

1. A wrench characterized by, The utility model relates to a spanner head, one end of the spanner head has the engagement groove for engaging with the screw part, handle, one-way limiting mechanism, the handle is connected with the other end of the spanner head through the one-way limiting mechanism, and the one-way limiting mechanism is used to limit the one-way rotation of the handle relative to the spanner head. The one-way limiting mechanism comprises: The first one-way limiting mechanism has the first limiting state capable of limiting the rotation of the handle relative to the spanner head along the first direction and the first release state releasing the limiting of the handle relative to the spanner head along the first direction, and the second one-way limiting mechanism has the second limiting state capable of limiting the rotation of the handle relative to the spanner head along the second direction and the second release state releasing the limiting of the handle relative to the spanner head along the second direction, the first direction is opposite to the second direction, and when the first one-way limiting mechanism is in the first limiting state, the second one-way limiting mechanism is in the second release state; when the second one-way limiting mechanism is in the second limiting state, the first one-way limiting mechanism is in the first release state. The first one-way limiting mechanism comprises:

2. The wrench of claim 1, wherein The first ratchet wheel and the first pawl are limitedly matched along the first direction, and one of the first ratchet wheel and the first pawl is arranged on the handle, and the other is arranged on the spanner head, the first adjusting piece is installed on the handle or the spanner head, the first adjusting piece is used to adjust the position of the first pawl relative to the first ratchet wheel, and the first adjusting piece adjusts the separation of the first pawl and the first ratchet wheel, and the first one-way limiting mechanism is in the first release state. The first ratchet wheel is arranged on the handle, one end of the first pawl is rotatably arranged on the spanner head, and the other end of the first pawl is used to abut against the first ratchet wheel and limit; The first adjusting piece is used to abut against the first pawl and drive the first pawl to rotate, so that the first pawl is separated from the first ratchet wheel.

3. The wrench of claim 2, wherein, The first adjusting piece comprises: The first eccentric cam is hinged to the spanner head, and the first eccentric cam abuts against the first pawl and drives the first pawl to rotate. The second one-way limiting mechanism comprises:

4. The wrench of claim 3, wherein, The second ratchet wheel and the second pawl are limitedly matched along the second direction, and one of the second ratchet wheel and the second pawl is arranged on the handle, and the other is arranged on the spanner head, the second adjusting piece is installed on the handle or the spanner head, the second adjusting piece is used to adjust the position of the second pawl relative to the second ratchet wheel, and the second adjusting piece adjusts the separation of the second pawl and the second ratchet wheel, and the second one-way limiting mechanism is in the second release state. The second ratchet wheel is arranged on the handle, one end of the second pawl is rotatably arranged on the spanner head, and the other end of the second pawl is used to abut against the second ratchet wheel and limit; 5. The wrench of claim 4, wherein, ​ ​ 6. The wrench of claim 3, wherein, ​ ​ ​ 7. The wrench of claim 6, wherein, ​ The second adjusting member is used for abutting against the second pawl and driving the second pawl to rotate, so that the second pawl is separated from the second ratchet wheel.

8. The wrench of claim 7, wherein, The second adjusting member comprises: A second eccentric cam is hinged to the wrench head, and the second eccentric cam abuts against the second pawl and drives the second pawl to rotate.

9. The wrench of claim 6, wherein, The first ratchet wheel and the second ratchet wheel are integrally formed and symmetrical about the line connecting the wrench head and the handle; The first pawl and the second pawl are symmetrically arranged about the line connecting the wrench head and the handle.

10. The wrench according to any one of claims 1 to 9, wherein An end of the wrench head close to the handle has a first recessed area, and an end of the handle close to the wrench head has a second recessed area, the first recessed area and the second recessed area are overlapped and hingedly connected; The one-way limiting mechanism is arranged at the overlapped position of the handle and the wrench head.

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