WRENCH

Abstract

The invention relates to a wrench (100). The wrench (100) consists of a wrench body (1), a drive mechanism (2), a toothed part (3), a first locking pin assembly (4) and elastic parts (7). The drive mechanism (2) is arranged to be rotatable on the wrench body (1). The toothed part is arranged coaxially on the side surface of the drive mechanism (2) and is rotatable in sync with the drive mechanism (2). The first locking pin assembly (4) is arranged to be movable on the wrench body (1). The first locking pin assembly (4) consists of a first locking pin (41) and a second locking pin (42) arranged along the circumferential direction of the toothed part (3) to restrict the toothed part (3) from rotating relative to the wrench body (1) in a predetermined direction. When at least part of the first locking pin (41) is engaged with the toothed part (3), at least part of the second locking pin (42) is in a state of incomplete engagement with the toothed part (3).

Description

wrench Technical Field

[0001] The present application relates to the technical field of operating tools, in particular to a wrench. Background Art

[0002] A wrench is a tool used to tighten or loosen components such as sockets, nuts, and bolts. Conventional ratchet wrenches utilize a spindle that engages the socket, nut, or bolt, and then rotates and applies force via a handle. The spindle rotates synchronously with the handle to tighten or loosen the components. When operating space is limited, the handle needs to be rotated in the opposite direction by a certain angle. This secures the spindle relative to the socket, nut, or bolt. When the handle is rotated back to its initial position, it is rotated again to tighten or loosen the components.

[0003] When the handle is rotated in the opposite direction, the ratchet wheel needs to be rotated at least by one tooth groove angle. However, when the operating space is too small to rotate the tooth groove angle, the ratchet wrench cannot be used, which limits the application range of the ratchet wrench.

[0004] In related traditional technologies, some ratchet wrenches achieve the effect of multiple teeth by reducing the tooth profile to increase the number of teeth. However, the smaller tooth profile may cause insufficient torque or tooth breakage, resulting in poor strength of the wrench.

[0005] Summary of the Invention

[0006] Based on this, it is necessary to provide a wrench.

[0007] The present application provides a wrench, comprising: a wrench body; a driving member rotatably disposed on the wrench body and used to drive an external element; a tooth portion coaxially disposed on a side of the driving member and capable of rotating synchronously with the driving member; a first pawl assembly movably disposed on the wrench body, the first pawl assembly comprising a first pawl and a second pawl arranged along the circumference of the tooth portion, the first pawl and the second pawl both being capable of engaging with the tooth portion so that the driving member and the wrench body rotate synchronously along a preset direction, wherein when at least part of the first pawl is engaged with the tooth portion, at least part of the second pawl is in a non-completely engaged state with the tooth portion; and an elastic member capable of applying an elastic force to the first pawl and the second pawl so that at least part of the first pawl and at least part of the second pawl have a tendency to move toward a side close to the tooth portion.

[0008] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered to limit the scope of the disclosed inventions, the presently described embodiments and / or examples, and any of the best modes currently understood for these inventions.

[0010] FIG1 is a schematic diagram of the three-dimensional structure of a wrench according to an embodiment of the present application.

[0011] FIG2 is a schematic diagram of the structure of FIG1 provided in this application from a rear-view perspective.

[0012] FIG3 is a schematic diagram of a partial structure of an embodiment provided in this application.

[0013] FIG4 is a second schematic diagram of a partial structure of an embodiment provided in this application.

[0014] FIG5 is a third schematic diagram of a partial structure of an embodiment provided in this application.

[0015] FIG6 is a fourth schematic diagram of a partial structure of an embodiment provided in this application.

[0016] FIG7 is a schematic diagram of a partial three-dimensional structure of an embodiment provided in this application.

[0017] FIG8 is a schematic cross-sectional view of the structure of FIG7 provided in this application.

[0018] FIG9 is a schematic diagram of a partial structure of an embodiment provided in this application.

[0019] FIG10 is a schematic diagram of a partial three-dimensional structure of an embodiment provided in this application.

[0020] FIG11 is a schematic cross-sectional view of the structure of FIG10 provided in this application.

[0021] FIG12 is a schematic diagram of a partial structure of an embodiment provided in this application.

[0022] FIG13 is a schematic diagram of a partial structure of an embodiment provided in this application.

[0023] FIG14 is a second schematic diagram of a partial structure of an embodiment provided in this application.

[0024] FIG15 is a schematic cross-sectional view of the structure of FIG13 provided in this application.

[0025] FIG16 is a schematic diagram of a partial three-dimensional structure of an embodiment provided in the present application.

[0026] FIG17 is a schematic cross-sectional structural diagram of an embodiment provided in the present application.

[0027] FIG18 is a schematic cross-sectional structural diagram of FIG2 provided in this application.

[0028] FIG19 is a schematic structural diagram of an embodiment provided in this application.

[0029] FIG20 is a schematic diagram of the exploded structure of the wrench in FIG19 .

[0030] FIG21 is a schematic structural diagram of the wrench in FIG19 from another perspective.

[0031] FIG22 is a schematic diagram of a partial cross-sectional structure of the wrench in FIG21 with AA as the cutting line.

[0032] FIG23 is a schematic diagram of a partial cross-sectional structure of the wrench in FIG21 with BB as the cutting line.

[0033] FIG24 is a schematic diagram of a partial structure of the wrench in FIG19 .

[0034] FIG25 is a second schematic diagram of the partial structure of the wrench in FIG19 .

[0035] FIG26 is a schematic structural diagram of the wrench in FIG19 in another state.

[0036] FIG27 is a schematic diagram of a partial cross-sectional structure of the wrench in FIG26 .

[0037] Figure numerals: 100, wrench; 1, wrench body; 11, groove; 12, limit groove; 13, handle; 14, operating part; 141, closing plate; 2, driving member; 3, tooth portion; 4, first pawl assembly; 41, first pawl; 42, second pawl; 43, fifth pawl; 5, second pawl assembly; 51, third pawl; 52, fourth pawl; 53, sixth pawl; 40, first tooth block; 50, second tooth block; 405, ratchet; 101, first mounting groove; 1011, first groove portion; 1012, second groove portion; 102 , second mounting groove; 1021, third groove portion; 1022, fourth groove portion; 601, restricted space; 602, meshing space; 6, reversing assembly; 61, reversing member; 611, raised portion; 612, recessed portion; 62, driving portion; 621, raised portion; 622, recessed portion; 63, first rotating member; 64, second rotating member; 65, first transmission member; 66, second transmission member; 67, arc groove; 68, arc block; 69, toggle member; 7, elastic member; 71, first elastic member; 72, second elastic member; 200, external component. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0039] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0043] The existing ratchet wrench is operated by rotating the handle to apply force after the main shaft is matched with the sleeve, nut, bolt and other components. At this time, the main shaft can rotate synchronously with the handle to achieve the purpose of tightening or loosening the sleeve, nut, bolt and other components. When the operating space is small, the handle needs to be rotated in the opposite direction by a certain angle. At this time, the main shaft is fixed relative to the sleeve, nut, bolt and other components. When the handle is rotated in the opposite direction to the initial position, it is rotated again to apply force to tighten or loosen the sleeve, nut, bolt and other components. When the handle is rotated in the opposite direction, at least one tooth groove of the ratchet needs to be rotated. However, when the operating space is small and it is impossible to rotate one tooth groove, the ratchet wrench cannot be used, resulting in a limited scope of application of the ratchet wrench.

[0044] In related conventional technologies, some ratchet wrenches achieve the effect of multiple teeth by reducing the tooth profile to increase the number of teeth. However, the smaller tooth profile may result in insufficient torque or tooth breakage, resulting in poor strength of the wrench. Some ratchet wrenches also have two pawls arranged axially along the ratchet wheel, with the two pawls offset laterally. Although this can achieve multiple teeth, the width of each pawl is only half the width of the ratchet wheel, which results in a smaller contact area between each pawl and the ratchet wheel, thereby reducing the transmission strength between the pawl and the ratchet wheel, and still resulting in poor strength and easy damage to the wrench.

[0045] In order to solve the above problems, as shown in Figures 1 to 16, the present application provides a wrench 100, which can be used in a narrow operating space while ensuring strength.

[0046] As shown in Figures 1 and 4, specifically, the wrench 100 includes a wrench body 1, a driving member 2, a tooth portion 3, a first pawl assembly 4 and an elastic member 7. The driving member 2 is rotatably arranged on the wrench body 1 and is used to drive the external element 200; the tooth portion 3 is coaxially arranged on the side of the driving member 2 and can rotate synchronously with the driving member 2; the first pawl assembly 4 is movably arranged on the wrench body 1, and the first pawl assembly 4 includes a first pawl 41 and a second pawl 42 arranged along the circumference of the tooth portion 3, and the first pawl 4 1 and the second pawl 42 can both engage with the tooth portion 3, so that the driving member 2 and the wrench body 1 rotate synchronously along a preset direction (i.e., rotate along the -A direction with the axis of the driving member 2 as the rotation center as shown in Figure 4), wherein, when the first pawl 41 is engaged with the tooth portion 3, the second pawl 42 is in a non-completely engaged state with the tooth portion 3; the elastic member 7 can apply an elastic force to the first pawl 41 and the second pawl 42, so that the first pawl 41 and the second pawl 42 have a tendency to move toward the side close to the tooth portion 3.

[0047] As shown in FIG. 1 and FIG. 2 , the wrench body 1 includes a handle 13 and an operating portion 14 disposed at one end of the handle 13 , and the driving member 2 is disposed at the operating portion 14 .

[0048] The driver 2 cooperates with components such as the sleeve, nut, and bolt. The control handle 13 rotates in the -A direction shown in Figure 4 about the axis of the driver 2. The first pawl 41 and the second pawl 42 engage the tooth portion 3, enabling the driver 2 to rotate synchronously with the wrench body 1 in the -A direction. At this time, the driver 2 can tighten or loosen components such as the sleeve, nut, and bolt. The control handle 13 rotates in the +A direction shown in Figure 4 about the axis of the driver 2. At this time, the tooth portion 3 slips between the first pawl 41 and the second pawl 42. Therefore, the wrench body 1 can rotate independently in the +A direction shown in Figure 4, while the tooth portion 3 and the driver 2 remain fixed relative to the sleeve, nut, and bolt.

[0049] As previously mentioned, in the existing ratchet wrench 100, when the handle rotates in the opposite direction, it is necessary to rotate at least one tooth groove of the ratchet. However, when the operating space is narrow and the angle of the tooth groove cannot be rotated, the ratchet wrench 100 cannot be used, resulting in a limited application range of the ratchet wrench 100. In contrast, in the wrench 100 provided in the embodiment of the present application, when the first pawl 41 is engaged with the tooth portion 3, the second pawl 42 is in a non-complete meshing state with the tooth portion 3. When the second pawl 42 is engaged with the tooth portion 3, the first pawl 41 is in a non-complete meshing state with the tooth portion 3. In this way, when the wrench body 1 is rotated in the +A direction shown in Figure 4, it only needs to rotate an angle less than one tooth groove of the tooth portion 3 to be able to rotate again in the -A direction shown in Figure 4 to tighten or loosen components such as sleeves, nuts, and bolts, achieving the effect of multiple teeth, thereby enabling the wrench 100 to be used in a narrow operating space. The elastic member 7 can apply a pre-tightening force to the first pawl 41 and the second pawl 42 toward the tooth portion 3 so that the first pawl 41 and the second pawl 42 have a tendency to move toward the side close to the tooth portion 3, thereby assisting the first pawl 41 and the second pawl 42 to engage with the tooth portion 3.

[0050] Moreover, compared with the conventional technology of increasing the number of teeth by reducing the tooth profile, or arranging two pawls with a lateral angle offset in parallel along the axial direction of the ratchet, the wrench 100 provided in the present application does not need to change the tooth profile size of the tooth portion 3, and the first pawl 41 and the second pawl 42 are arranged along the circumference of the tooth portion 3. Therefore, the width of the first pawl 41 and the second pawl 42 can be equal to or slightly larger than the width of the tooth portion 3 (i.e., the dimension along the axial direction of the tooth portion 3), thereby increasing the contact area between the first pawl 41 and the second pawl 42 and the tooth portion 3, ensuring the transmission strength between the first pawl 41 and the second pawl 42 and the tooth portion 3, avoiding tooth breakage due to insufficient torque between the first pawl 41 and the second pawl 42 and the tooth portion 3, and thus ensuring the strength of the wrench 100.

[0051] In the illustrated embodiment, when the first pawl 41 is engaged with the tooth portion 3, that is, when the tooth top of the first pawl 41 is opposite to the bottom of the tooth groove of the tooth portion 3, the tooth top of the second pawl 42 is opposite to the tooth top of the tooth portion 3; when the second pawl 42 is engaged with the tooth portion 3, that is, when the tooth top of the second pawl 42 is opposite to the bottom of the tooth groove of the tooth portion 3, the tooth top of the first pawl 41 is opposite to the tooth top of the tooth portion 3. When the wrench body 1 is rotated in the +A direction shown in Figure 4, it only needs to rotate half the angle of the tooth groove of the tooth portion 3 to rotate again in the -A direction shown in Figure 4 to tighten or loosen components such as sleeves, nuts and bolts, thereby enabling the wrench 100 to be used in narrow operating spaces. Of course, in other embodiments, when the tooth top of the first pawl 41 cooperates with the tooth groove of the tooth portion 3, the tooth top of the second pawl 42 is opposite to the side wall of the tooth groove of the tooth portion 3; when the tooth top of the second pawl 42 cooperates with the tooth groove of the tooth portion 3, the tooth top of the first pawl 41 is opposite to the side wall of the tooth groove of the tooth portion 3.

[0052] The driving member 2 includes a driving shaft or a driving ring. As shown in FIG18 , the driving shaft can be a solid shaft or a non-solid shaft. The driving shaft can be inserted into an external component 200 such as a screw, and other components can be arranged inside the non-solid shaft. As shown in FIG17 , a through hole is provided in the center of the driving ring so that the driving ring can be sleeved on the outside of an external component 200 such as a nut. In this way, the scope of application of the wrench 100 can be expanded. The driving member 2 can be integrally formed with the tooth portion 3, or the driving member 2 and the tooth portion 3 can be set as a split structure and connected by a fixing form or a matching form such as screws or gluing.

[0053] As shown in Figures 4 and 6, the wrench 100 also includes a second pawl assembly 5 movably arranged on the wrench body 1, and the second pawl assembly 5 can engage with the tooth portion 3 to enable the driving member 2 and the wrench body 1 to rotate synchronously in the opposite direction of a preset direction (that is, along the axis of the driving member 2 as the rotation center as shown in Figure 6, and rotate in the +A direction); the wrench 100 also includes a reversing assembly 6 arranged on the wrench body 1, and the reversing assembly 6 is used to change the positions of the first pawl assembly 4 and the second pawl assembly 5 so that at least one of the first pawl assembly 4 and the second pawl assembly 5 can engage with the tooth portion 3. When the reversing assembly 6 controls the first pawl assembly 4 to engage with the tooth portion 3, the wrench body 1 can rotate in the -A direction shown in FIG4 to tighten or loosen components such as sleeves, nuts, and bolts through the driving member 2. When the reversing assembly 6 controls the second pawl assembly 5 to engage with the tooth portion 3, the wrench body 1 can rotate in the +A direction shown in FIG6 to tighten or loosen components such as sleeves, nuts, and bolts through the driving member 2. Thus, the wrench 100 can be conveniently operated and easy to use.

[0054] Specifically, the second pawl assembly 5 includes a third pawl 51 and a fourth pawl 52 arranged along the circumference of the tooth portion 3. Both the third pawl 51 and the fourth pawl 52 are capable of engaging with the tooth portion 3. When the third pawl 51 engages with the tooth portion 3, the fourth pawl 52 is in a non-complete engagement state with the tooth portion 3. When the fourth pawl 52 engages with the tooth portion 3, the third pawl 51 is in a non-complete engagement state with the tooth portion 3. In the illustrated embodiment, when the third pawl 51 engages with the tooth portion 3, that is, when the tooth top of the third pawl 51 is opposite to the bottom of the tooth groove of the tooth portion 3, the tooth top of the fourth pawl 52 is opposite to the tooth top of the tooth portion 3. When the fourth pawl 52 engages with the tooth portion 3, that is, when the tooth top of the fourth pawl 52 is opposite to the bottom of the tooth groove of the tooth portion 3, the tooth top of the third pawl 51 is opposite to the tooth top of the tooth portion 3. In this way, when the wrench body 1 is rotated in the -A direction shown in FIG6 , it only needs to rotate half the angle of the tooth groove of the tooth portion 3 to be able to rotate again in the +A direction shown in FIG6 , so as to tighten or loosen components such as sleeves, nuts, and bolts, thereby enabling the use of the wrench 100 in narrow operating spaces. Of course, in other embodiments, when the tooth top of the third pawl 51 is engaged with the tooth groove of the tooth portion 3, the tooth top of the fourth pawl 52 may be opposite to the side wall of the tooth groove of the tooth portion 3; when the tooth top of the fourth pawl 52 is engaged with the tooth groove of the tooth portion 3, the tooth top of the third pawl 51 may be opposite to the side wall of the tooth groove of the tooth portion 3.

[0055] When the third and fourth pawls 51, 52 engage with the toothed portion 3, the control handle 13 rotates in the +A direction shown in FIG6 about the axis of the driver 2. Since the third and fourth pawls 51, 52 engage with the toothed portion 3, the driver 2 and the wrench body 1 can rotate synchronously in the +A direction. At this time, the driver 2 can tighten or loosen components such as the sleeve, nut, and bolt. When the control handle 13 rotates in the -A direction shown in FIG6 about the axis of the driver 2, the toothed portion 3 slips between the third and fourth pawls 51, 52. Therefore, the wrench body 1 can rotate independently in the -A direction shown in FIG6, while the toothed portion 3 and the driver 2 remain fixed relative to the sleeve, nut, and bolt.

[0056] As shown in Figures 3 to 8, in one embodiment, the wrench body 1 has a groove 11 and two limiting grooves 12 extending outward from the inner circumferential wall of the groove 11, the tooth portion 3 is rotatably arranged in the groove 11, the first pawl 41 and the third pawl 51 are movably arranged in one of the limiting grooves 12, and the second pawl 42 and the fourth pawl 52 are movably arranged in the other limiting groove 12; an elastic member 7 is provided between the first pawl 41 and the third pawl 51, and when the first pawl 41 or the third pawl 51 is disengaged from the tooth portion 3, it will move toward the side closer to the other, so that the corresponding elastic member 7 is further compressed; an elastic member 7 is provided between the second pawl 42 and the fourth pawl 52, and when the second pawl 42 or the fourth pawl 52 is disengaged from the tooth portion 3, it will move toward the side closer to the other, so that the corresponding elastic member 7 is further compressed.

[0057] As shown in Figures 9 to 11, in another embodiment, the wrench body 1 may also have four limiting grooves 12 extending outward from the inner circumferential wall of the groove 11, and the first pawl 41, the second pawl 42, the third pawl 51 and the fourth pawl 52 are slidably arranged in the four limiting grooves 12 along the circumference of the tooth portion 3 in sequence, and an elastic member 7 is provided between each pawl and the inner wall of the corresponding limiting groove 12. When the first pawl 41, the second pawl 42, the third pawl 51 and the fourth pawl 52 are disengaged from the tooth portion 3, they will move toward the side away from the tooth portion 3 to further compress the corresponding elastic member 7.

[0058] As shown in Figures 7 to 8 and 10 to 11, the reversing assembly 6 includes a reversing member 61 rotatably disposed within the groove 11. The reversing member 61 is coaxially disposed with the tooth portion 3 and is rotatable in the ±A direction shown in Figure 4. When the reversing member 61 rotates, it can change the position of the first pawl assembly 4 and the second pawl assembly 5 so that at least one of the first pawl assembly 4 and the second pawl assembly 5 can engage with the tooth portion 3. As shown in Figures 3, 5, and 9, the reversing assembly 6 also includes a driving portion 62 rotatably disposed within the limiting groove 12. The driving portion 62 and the reversing member 61 are driven by tooth meshing, and the driving portion 62 rotates about its own axis in the ±B direction shown in Figure 3. Since the first pawl assembly 4 and the second pawl assembly 5 are arranged along the circumference of the tooth portion 3, the reversing member 61 is coaxial with the tooth portion 3, which can facilitate the control of the engagement of the first pawl assembly 4 and the second pawl assembly 5 with the tooth portion 3; driving the reversing member 61 by engaging the driving portion 62 with the reversing member 61 can avoid directly driving the reversing member 61 and interfering with the tooth portion 3 or the driving member 2.

[0059] As shown in Figures 7 to 8 and Figures 10 to 11, the outer periphery of the reversing member 61 includes a protrusion 611 and a recessed portion 612; the protrusion 611 can be enclosed with the limiting groove 12 to form a limiting space 601 to limit the engagement of the first pawl assembly 4 or the second pawl assembly 5 with the tooth portion 3; the recessed portion 612 can be enclosed with the limiting groove 12 to form an engagement space 602 to enable the first pawl assembly 4 or the second pawl assembly 5 to engage with the tooth portion 3. When the reversing member 61 rotates, it can change the position of the limiting space 601 and the meshing space 602. When the reversing member 61 rotates to the point where the first pawl 41 and the second pawl 42 are located in the limiting space 601, the protrusion 611 cooperates with the first pawl 41 and the second pawl 42. The protrusion 611 can push the first pawl 41 and the second pawl 42 to the side away from the tooth portion 3 and separate them from the tooth portion 3 to limit the engagement of the first pawl 41 and the second pawl 42 with the tooth portion 3. The reversing member 61 overcomes the elastic force of the elastic member 7 to further compress it. At the same time, the third pawl 51 and the fourth pawl 52 are located in the meshing space 602, and the recessed portion 612 cooperates with the third pawl 51 and the fourth pawl 52. Under the action of the elastic member 7, the third pawl 51 and the fourth pawl 52 move to the side close to the tooth portion 3 and mesh with the tooth portion 3.

[0060] When the reversing member 61 rotates until the third pawl 51 and the fourth pawl 52 are located in the restricted space 601, the protrusion 611 cooperates with the third pawl 51 and the fourth pawl 52, and the protrusion 611 can push the third pawl 51 and the fourth pawl 52 to the side away from the tooth portion 3 and separate them from the tooth portion 3, so as to limit the engagement of the third pawl 51 and the fourth pawl 52 with the tooth portion 3, and the reversing member 61 overcomes the elastic force of the elastic member 7 to further compress it; at the same time, the first pawl 41 and the second pawl 42 are located in the engagement space 602, and the recessed portion 612 cooperates with the first pawl 41 and the second pawl 42. Under the action of the elastic member 7, the first pawl 41 and the second pawl 42 move to the side close to the tooth portion 3 and engage with the tooth portion 3.

[0061] As shown in Figures 9 and 11 , the protrusion 611 and the recess 612 are connected by an inclined surface to provide a guide, facilitating the reversing member 61 to push the pawl. Alternatively, the pawl may be provided with an inclined surface or guide member that mates with the inclined surface between the protrusion 611 and the recess 612 to further facilitate the reversing member 61 in pushing the pawl. The adjustment method of switching the engagement of the first pawl assembly 4 with the tooth portion 3 or the engagement of the second pawl assembly 5 with the tooth portion 3 via the reversing member 61 is simple and convenient, with a small number of parts, facilitating production and assembly.

[0062] As shown in Figures 2 and 3, the reversing assembly 6 further includes a toggle member 69 movably disposed on the wrench body 1 and connected to the drive unit 62, with at least a portion of the toggle member 69 extending outside the wrench body 1. A user can drive the drive unit 62 to rotate within the wrench body 1 by toggling the toggle member 69 outside the wrench body 1, making operation convenient.

[0063] In other words, the wrench 100 has a first use state in which it rotates in a preset direction and a second use state in which it rotates in the opposite direction to the preset direction; in the first use state, at least some of the ratchet teeth of the first pawl 41 are fully engaged with the tooth portion 3, and at least some of the ratchet teeth of the second pawl 42 are partially engaged with the tooth portion 3; in the second use state, at least some of the ratchet teeth of the third pawl 51 are fully engaged with the tooth portion 3, and at least some of the ratchet teeth of the fourth pawl 52 are partially engaged with the tooth portion 3. The toggle member 69 of the reversing assembly 6 can drive the driving portion 62 to drive the reversing member 61 to rotate within the wrench body 1, thereby changing the mating positions of the first and second pawls 41, 42, and the third and fourth pawls 51, 52 with the tooth portion 3, so that the wrench 100 can be switched between the first use state and the second use state.

[0064] As shown in FIG12 , in another embodiment, the wrench body 1 may further include a limiting groove 12 extending outward from the inner circumferential wall of the groove 11. The first pawl 41, the second pawl 42, the third pawl 51, and the fourth pawl 52 are sequentially arranged in the limiting groove 12 along the circumference of the tooth portion 3. Each pawl is capable of rotating along its own axis, and an elastic member 7 is provided between each pawl and the inner wall of the limiting groove 12. The reversing assembly 6 includes a driving portion 62 rotatably arranged in the limiting groove 12. The driving portion 62 is capable of rotating about its own axis in the ±C direction shown in FIG12 . The driving portion 62 is located between the second pawl 42 and the third pawl 51. The outer periphery of the driving portion 62 includes a protrusion 621 and a recess 622 capable of engaging with the second pawl 42 and the third pawl 51. When the driving part 62 rotates until the convex part 621 cooperates with the second pawl 42, the convex part 621 can push the second pawl 42 to the side away from the tooth part 3 and separate it from the tooth part 3, and the second pawl 42 can push the first pawl 41 to the side away from the tooth part 3 and separate it from the tooth part 3, and the driving part 62 overcomes the elastic force of the elastic part 7 to further compress it; at the same time, the recessed part 622 corresponds to the third pawl 51, wherein the third pawl 51 can be in contact with the recessed part 622 or spaced a distance apart, and the third pawl 51 and the fourth pawl 52 move toward the side close to the tooth part 3 under the action of the elastic part 7 and can engage with the tooth part 3. When the driving part 62 rotates until the convex part 621 cooperates with the third pawl 51, the convex part 621 can push the third pawl 51 to the side away from the tooth part 3 and separate it from the tooth part 3, and the third pawl 51 can push the fourth pawl 52 to the side away from the tooth part 3 and separate it from the tooth part 3, and the driving part 62 overcomes the elastic force of the elastic part 7 to further compress it; at the same time, the concave part 622 corresponds to the second pawl 42, wherein the second pawl 42 can contact or be separated from the concave part 622, and the first pawl 41 and the second pawl 42 move toward the side close to the tooth part 3 under the action of the elastic part 7 and can engage with the tooth part 3.

[0065] As shown in Figures 2 and 12, the reversing assembly 6 also includes a toggle member 69 movably mounted on the wrench body 1 and connected to the reversing member 61. At least a portion of the toggle member 69 extends outside the wrench body 1. The user can rotate the reversing member 61 within the wrench body 1 by toggling the toggle member 69 from outside the wrench body 1, making operation convenient. Furthermore, the operating portion 14 includes a sealing plate 141 that seals one side of the groove 11 and the retaining groove 12 to prevent the teeth 3 and the reversing assembly 6 from dislodging.

[0066] The elastic members 7 can be configured as elastic elements such as springs, rubber members, and silicone members, and no specific limitation is made here.

[0067] As shown in Figures 13 to 16, in other embodiments, the wrench body 1 may also have two limiting grooves 12 extending outward from the inner peripheral wall of the groove 11, and the reversing assembly 6 includes a first rotating member 63 and a second rotating member 64 respectively disposed in the two limiting grooves 12 and capable of synchronously rotating about their own axes, wherein the first rotating member 63 can rotate along the ±E direction shown in Figure 13, and the second rotating member 64 can rotate along the ±F direction shown in Figure 13. The first pawl 41 and the third pawl 51 are spaced apart on the outer periphery of the first rotating member 63, and the second pawl 42 and the fourth pawl 52 are spaced apart on the outer periphery of the second rotating member 64. Among them, the inner walls of the two limiting grooves 12 are respectively provided with grooves, and elastic members 7, such as elastic balls or elastic protrusions, are provided in the grooves. Part of the elastic balls or the ends are exposed from the grooves. When the first rotating member 63 or the second rotating member 64 squeezes the elastic balls during rotation, the elastic balls can be compressed in the grooves and apply elastic force to the first rotating member 63 or the second rotating member 64, so that the first rotating member 63 or the second rotating member 64 has a tendency to rotate in the opposite direction.

[0068] As shown in FIG16 , the reversing assembly 6 further includes a first transmission member 65 disposed on the first rotating member 63 and a second transmission member 66 disposed on the second rotating member 64, wherein the first transmission member 65 is coaxially disposed with the first rotating member 63 and is capable of rotating about its own axis, and the second transmission member 66 is coaxially disposed with the second rotating member 64 and is capable of rotating about its own axis. The wrench body 1 further includes a drive groove connected to the two limit grooves 12, and the reversing assembly 6 further includes a drive portion 62 rotatably disposed in the drive groove. The drive portion 62 is driven by teeth meshing with the first transmission member 65 and the second transmission member 66, and is capable of rotating about its own axis in the ±D direction shown in FIG13 . The first pawl assembly 4 is switched to mesh with the tooth portion 3 or the second pawl assembly 5 is switched to mesh with the tooth portion 3 by rotating the first rotating member 63 and the second rotating member 64. The adjustment method is simple and convenient. In addition, the rotation of the first rotating member 63 and the second rotating member 64 is controlled by the gear meshing transmission to ensure that the first rotating member 63 and the second rotating member 64 can rotate synchronously. The gear structure is simple and easy to produce and process. The reversing assembly 6 also includes a toggle member 69 connected to the driving portion 62. At least part of the toggle member 69 extends outside the wrench body 1. The toggle member 69 can rotate around its own axis in the ±D direction shown in Figure 13. The user can drive the driving portion 62 to rotate inside the wrench body 1 by toggling the toggle member 69 outside the wrench body 1, which is easy to operate.

[0069] As shown in Figures 13 and 14, when the user rotates the toggle member 69 in the +D direction, the toggle member 69 can drive the driving portion 62 to rotate in the +D direction, and the driving portion 62 can drive the first transmission member 65 to rotate in the -E direction, and drive the second transmission member 66 to rotate in the -F direction at the same time, thereby driving the first rotating member 63 to rotate in the -E direction and the second rotating member 64 to rotate in the -F direction at the same time, so that the first pawl 41 and the second pawl 42 can engage with the tooth portion 3. When the user rotates the toggle member 69 in the -D direction, the toggle member 69 can drive the driving portion 62 to rotate in the -D direction, and the driving portion 62 can drive the first transmission member 65 to rotate in the +E direction and drive the second transmission member 66 to rotate in the +F direction at the same time, thereby driving the first rotating member 63 to rotate in the +E direction and the second rotating member 64 to rotate in the +F direction, so that the third pawl 51 and the fourth pawl 52 can engage with the tooth portion 3.

[0070] As shown in FIG13 , when the first pawl 41 and the second pawl 42 are engaged with the tooth portion 3, the tooth portion 3 can rotate in the -A direction. At this time, when the tooth top of the tooth portion 3 is opposite to the tooth top of the first pawl 41 or the second pawl 42, the tooth portion 3 will push the first rotating member 63 to rotate in the +E direction or push the second rotating member 64 to rotate in the +F direction, so that the first pawl 41 or the second pawl 42 separates from the tooth portion 3 and slips, and the elastic ball corresponding to the first rotating member 63 or the second rotating member 64 is compressed. An elastic force is applied to the first rotating member 63 or the second rotating member 64, causing the first rotating member 63 to rotate in the -E direction or the second rotating member 64 to rotate in the -F direction. When the tooth tops of the first pawl 41 or the second pawl 42 correspond with the tooth grooves of the tooth portion 3, the elastic ball can push the first rotating member 63 to rotate in the -E direction or the second rotating member 64 to rotate in the -F direction, causing the first pawl 41 or the second pawl 42 to engage with the tooth portion 3. When the first rotating member 63 and the second rotating member 64 abut against the inner wall of the limiting groove 12, they can restrict the rotation of the tooth portion 3. At this time, the wrench body 1 can drive the tooth portion 3 and the driving member 2 to rotate synchronously in the +A direction to tighten or loosen components such as sleeves, nuts, and bolts.

[0071] As shown in FIG14 , when the third pawl 51 and the fourth pawl 52 can be engaged with the tooth portion 3, the tooth portion 3 can rotate in the +A direction. At this time, when the tooth top of the tooth portion 3 is opposite to the tooth top of the third pawl 51 or the fourth pawl 52, the tooth portion 3 will push the first rotating member 63 to rotate in the -E direction or push the second rotating member 64 to rotate in the -F direction, so that the third pawl 51 or the fourth pawl 52 separates from the tooth portion 3 and slips, and the elastic ball corresponding to the first rotating member 63 or the second rotating member 64 is compressed. An elastic force is applied to the first rotating member 63 or the second rotating member 64, causing the first rotating member 63 to rotate in the +E direction or the second rotating member 64 to rotate in the +F direction. When the tooth tops of the third pawl 51 or the fourth pawl 52 correspond with the tooth grooves of the tooth portion 3, the elastic ball can push the first rotating member 63 to rotate in the +E direction or the second rotating member 64 to rotate in the +F direction, causing the third pawl 51 or the fourth pawl 52 to engage with the tooth portion 3. When the first rotating member 63 and the second rotating member 64 abut against the inner wall of the limiting groove 12, they can restrict the rotation of the tooth portion 3. At this time, the wrench body 1 can drive the tooth portion 3 and the driving member 2 to rotate synchronously in the -A direction to tighten or loosen components such as sleeves, nuts, and bolts.

[0072] As shown in Figures 15 and 16, both the first rotating member 63 and the second rotating member 64 are provided with an arcuate slot 67. The arcuate slot 67 of the first rotating member 63 is concentric with the first rotating member 63, and the arcuate slot 67 of the second rotating member 64 is concentric with the second rotating member 64. The first transmission member 65 and the second transmission member 66 are both provided with an arcuate block 68 that can be engaged with the arcuate slot 67, and the arcuate block 68 has a clearance fit with the arcuate slot 67. In this way, there is a certain amount of rotational space between the first rotating member 63 and the first transmission member 65, and between the second rotating member 64 and the second transmission member 66. When the pawl and the tooth portion 3 slip, the first rotating member 63 and the second rotating member 64 can rotate independently without driving the first transmission member 65 and the second transmission member 66. This prevents the first transmission member 65 and the second transmission member 66 from rotating when driven by the first rotating member 63 or the second rotating member 64, thereby driving the driving portion 62 to rotate, thereby driving the other to rotate synchronously and affecting the normal engagement of the pawl and the tooth portion 3. When the first transmission member 65 and the second transmission member 66 rotate, the arc block 68 can push the side wall of the arc groove 67 to drive the first rotating member 63 and the second rotating member 64 to rotate.

[0073] As shown in Figures 15 and 16, in the illustrated embodiment, two arc-shaped grooves 67 are provided on the first rotating member 63 and the second rotating member 64, and two arc-shaped blocks 68 corresponding to the arc-shaped grooves 67 are provided on the first transmission member 65 and the second transmission member 66. The two arc-shaped grooves 67 are arranged opposite to each other to improve the stability and reliability of the connection between the first rotating member 63 and the first transmission member 65 and between the second rotating member 64 and the second transmission member 66. Of course, in other embodiments, the first rotating member 63 and the second rotating member 64 may also be provided with one, three or more arc grooves 67, and different numbers of arc grooves 67 may be provided on the first rotating member 63 and the second rotating member 64. The first transmission member 65 and the second transmission member 66 are provided with arc blocks 68 corresponding in number and position to the arc grooves 67. When multiple arc grooves 67 are provided on the first rotating member 63 or the second rotating member 64, the multiple arc grooves 67 are preferably evenly spaced along the circumference of the first rotating member 63 or the second rotating member 64 to ensure the stability and reliability of the connection between the first rotating member 63 and the first transmission member 65 and between the second rotating member 64 and the second transmission member 66.

[0074] As shown in FIG17 , the first pawl assembly 4 further includes a fifth pawl 43 capable of engaging with the tooth portion 3. The first pawl 41, the second pawl 42, and the fifth pawl 43 are spaced apart along the periphery of the tooth portion 3. When the first pawl 41 or the second pawl 42 is engaged with the tooth portion 3, the fifth pawl 43 is in a non-fully engaged state with the tooth portion 3. The second pawl assembly 5 further includes a sixth pawl 53 capable of engaging with the tooth portion 3. The third pawl 51, the fourth pawl 52, and the sixth pawl 53 are spaced apart along the periphery of the tooth portion 3. When the third pawl 51 or the fourth pawl 52 is engaged with the tooth portion 3, the sixth pawl 53 is in a non-engaged state with the tooth portion 3.

[0075] In one embodiment, when the three groups of pawl assemblies are evenly distributed along the groove 11, when the reversing assembly 6 controls the first pawl assembly 4 to engage with the tooth portion 3, one of the first pawl 41, the second pawl 42, and the fifth pawl 43 may be fully engaged with the tooth portion 3, and the other two may be engaged with 2 / 3 and 1 / 3 of the tooth portion 3 respectively; when the reversing assembly 6 controls the second pawl assembly 5 to engage with the tooth portion 3, one of the third pawl 51, the fourth pawl 52, and the sixth pawl 53 may be fully engaged with the tooth portion 3, and the other two may be engaged with 2 / 3 and 1 / 3 of the tooth portion 3 respectively. In this way, the effect of more multiple teeth can be achieved, so that the wrench 100 can be used in a narrower operating space, further expanding the scope of application of the wrench 100. Of course, the engagement ratio of the three pawls can also be changed according to actual application requirements. In other embodiments, the first pawl assembly 4 and the second pawl assembly 5 may also include 4 pawls, 5 pawls or more respectively, and the multiple pawls are arranged at intervals along the outer periphery of the tooth portion 3, which is not specifically limited here.

[0076] As shown in Figures 19 to 27, in one embodiment, the first pawl 41 and the fourth pawl 52 are integrally formed into a first tooth block 40, and the ratchet teeth 405 of the first pawl 41 and the ratchet teeth 405 of the fourth pawl 52 are arranged in sequence along the first curvature radius on the side of the first tooth block 40 close to the tooth portion 3; the second pawl 42 and the third pawl 51 are integrally formed into a second tooth block 50, and the ratchet teeth 405 of the second pawl 42 and the ratchet teeth 405 of the third pawl 51 are arranged in sequence along the second curvature radius on the side of the second tooth block 50 close to the tooth portion 3; wherein the first curvature radius is greater than the curvature radius of the tooth portion 3, and the second curvature radius is greater than the curvature radius of the tooth portion 3. In other words, the ratchet teeth 405 of the first pawl 41 and the ratchet teeth 405 of the fourth pawl 52 are arranged sequentially along a first curvature on the side of the first tooth block 40 close to the tooth portion 3; the ratchet teeth 405 of the second pawl 42 and the ratchet teeth 405 of the third pawl 51 are arranged sequentially along a second curvature on the side of the second tooth block 50 close to the tooth portion 3. The first curvature is smaller than the curvature of the tooth portion 3, and the second curvature is smaller than the curvature of the tooth portion 3. This arrangement improves the synchronization of the first pawl assembly 4 and the second pawl assembly 5, effectively reduces the number of structural components, facilitates assembly, and makes the coordination between the first pawl assembly 4 and the second pawl assembly 5 and the reversing assembly 6 simpler and more stable, making reversing control easier. That is, the first curvature radius of the first tooth block 40 is greater than the curvature radius of the tooth portion 3, so that when a part of the ratchet teeth of the first tooth block 40 are engaged with the tooth portion 3, the ratchet teeth of the other part can be separated or partially separated from the tooth portion 3; similarly, the second curvature radius of the second tooth block 50 is greater than the curvature radius of the tooth portion 3, so that when a part of the ratchet teeth of the second tooth block 50 are engaged with the tooth portion 3, the ratchet teeth of the other part can be separated or partially separated from the tooth portion 3.

[0077] In other words, as shown in Figures 19 and 21 to 25, when the ratchet teeth of the first pawl 41 of the first tooth block 40 are engaged with the tooth portion 3, and the ratchet teeth of the second pawl 42 of the second tooth block 50 are not fully engaged with the tooth portion 3, the ratchet teeth of the fourth pawl 52 and the ratchet teeth of the third pawl 51 will be separated or partially separated from the tooth portion 3, so that the wrench body 1 and the driving member 2 can rotate synchronously in a preset direction (that is, as shown in Figure 22, with the axis of the driving member 2 as the rotation center, rotating in the -A direction). In this way, the driving member 2 can tighten or loosen components such as sleeves, nuts and bolts in the -A direction. When the control handle 13 is rotated in the +A direction shown in Figure 22 with the axis of the driver 2 as the rotation center, the tooth portion 3, the first tooth block 40, and the second tooth block 50 form a ratchet engagement. Therefore, the tooth portion 3 and the first pawl 41 and the second pawl 42 will slip, and the wrench body 1 can rotate independently in the +A direction shown in Figure 22, while the tooth portion 3 and the driver 2 remain fixed relative to the sleeve, nut, and bolt. In this way, by repeatedly rotating the control handle 13 and rotating the operating portion 14, force can be continuously applied to the sleeve, nut, and bolt, gradually tightening these components to the required tightening standard.

[0078] 26 and 27 , conversely, when the reversing member 61 is toggled, when the ratchet teeth of the fourth pawl 52 of the first tooth block 40 are not fully engaged with the tooth portion 3 and the ratchet teeth of the third pawl 51 of the second tooth block 50 are engaged with the tooth portion 3, the ratchet teeth of the first pawl 41 and the second pawl 42 will separate or partially separate from the tooth portion 3, allowing the wrench body 1 and the driver 2 to rotate synchronously in the opposite direction of the preset direction (i.e., in the +A direction with the axis of the driver 2 as the rotation center as shown in FIG27 ). At this time, the driver 2 can tighten or loosen the sleeve, nut, bolt, etc. in the +A direction. When the control handle 13 is rotated in the -A direction with the axis of the driver 2 as the rotation center as shown in FIG27 , the tooth portion 3 and the third pawl 51 and the fourth pawl 52 will slip, and the wrench body 1 can rotate alone in the -A direction as shown in FIG22 , while the tooth portion 3 and the driver 2 are fixed relative to the sleeve, nut, bolt, etc. In this way, by repeatedly rotating the control handle 13 and the rotating operating portion 14, force can be continuously applied to components such as the sleeve, nut and bolt, and these components can be gradually tightened to the required tightening standard.

[0079] As shown in Figures 20 to 25, a group of first mounting grooves 101 and second mounting grooves 102 arranged in a V-shape are provided between the first tooth block 40 and the reversing member 61, and between the second tooth block 50 and the reversing member 61, and an elastic member 7 is provided in each first mounting groove 101 and each second mounting groove 102; when the reversing member 61 is rotated in a preset direction or in the opposite direction of the preset direction, the slot pitch of the first mounting grooves 101 in each group along the arrangement direction of the elastic member 7 is shortened or the slot pitch of the second mounting grooves 102 in each group along the arrangement direction of the elastic member 7 is shortened, so as to compress the elastic member 7, so that part of the ratchet teeth 405 of one of the first tooth block 40 and the second tooth block 50 are engaged with the tooth portion 3, and part of the ratchet teeth 405 of the other one are not fully engaged with the tooth portion 3.

[0080] In other words, a group of elastic members 7 are provided between the first tooth block 40 and the reversing member 61 and between the second tooth block 50 and the reversing member 61, and each group of elastic members 7 includes a first elastic member 71 and a second elastic member 72 arranged in a V-shape; rotating the reversing member 61 in a preset direction or in the opposite direction of the preset direction can compress the two first elastic members 71 or the two second elastic members 72, so that part of the ratchet teeth 405 of one of the first tooth block 40 and the second tooth block 50 engages with the tooth portion 3, and part of the ratchet teeth 405 of the other one is not fully engaged with the tooth portion 3.

[0081] In this arrangement, since the first curvature radius and the second curvature radius are greater than the curvature radius of the tooth portion 3, the reversing member 61 can compress the elastic member 7 in the first mounting groove 101 or the second mounting groove 102 when reversing, so that one side of the first tooth block 40 and one side of the second tooth block 50 are elastically acted upon by the elastic member 7 to rotate closer to the tooth portion 3, and thus one of the partial ratchet teeth 405 of the first tooth block 40 and the partial ratchet teeth 405 of the second tooth block 50 can engage with the tooth portion 3, and the other can partially engage with the tooth portion 3; while the other side of the first tooth block 40 and the other side of the second tooth block 50 will rotate in the opposite direction and tilt away from the tooth portion 3, and thus separate or partially separate from the tooth portion 3.

[0082] Specifically, the first elastic member 71 is disposed in the first installation groove 101 , and the second elastic member 72 is disposed in the second installation groove 102 .

[0083] In this embodiment, in order to maintain better synchronization of the driving cooperation on both sides, the first curvature radius is equal to the second curvature radius, that is, the first curvature is equal to the second curvature.

[0084] As shown in Figures 23 to 25, the first mounting groove 101 includes a first groove portion 1011 and a second groove portion 1012 with opposite groove openings, and the second mounting groove 102 includes a third groove portion 1021 and a fourth groove portion 1022 with opposite groove openings, wherein the first groove portion 1011 and the fourth groove portion 1022 are opened on the side of the first tooth block 40 and the second tooth block 50 facing the reversing member 61, and the second groove portion 1012 and the third groove portion 1021 are correspondingly opened on the side of the reversing member 61 facing the first tooth block 40 and the second tooth block 50.

[0085] 22 and 23 , when the wrench body 1 rotates in a preset direction, the two second groove portions 1012 on the reversing member 61 approach the two first groove portions 1011 respectively, so that the groove pitch of the first mounting groove 101 is shortened, and the two elastic members 7 located in the two first mounting grooves 101 are compressed, thereby applying elastic force to the side of the first tooth block 40 relatively away from the second tooth block 50 and the side of the second tooth block 50 relatively close to the first tooth block 40, so that part of the ratchet teeth of the first tooth block 40 engages with the tooth portion 3, and part of the ratchet teeth of the second tooth block 50 does not fully engage with the tooth portion 3.

[0086] At the same time, the two third groove portions 1021 move away from the two fourth groove portions 1022 respectively, so that the groove pitch of the second mounting groove 102 is extended, and the compression amount of the two elastic members 7 located in the two second mounting grooves 102 is restored, and no elastic force is applied to the first tooth block 40 and the second tooth block 50, so that the other side of the first tooth block 40 and the other side of the second tooth block 50 can rotate in the opposite direction and separate or partially separate from the tooth portion 3.

[0087] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A wrench, characterized in that: include: Wrench body; A driving member, rotatably disposed on the wrench body and used to drive an external element; A tooth portion, coaxially arranged on a side surface of the driving member and capable of rotating synchronously with the driving member; a first pawl assembly movably disposed on the wrench body, the first pawl assembly comprising a first pawl and a second pawl arranged along the circumference of the tooth portion, the first pawl and the second pawl both being capable of meshing with the tooth portion so that the driving member and the wrench body rotate synchronously along a preset direction, wherein when at least a portion of the first pawl is meshed with the tooth portion, at least a portion of the second pawl is in a non-complete meshing state with the tooth portion; and The elastic member can apply elastic force to the first pawl and the second pawl, so that at least part of the first pawl and at least part of the second pawl have a tendency to move toward the side close to the tooth portion.

2. The wrench according to claim 1, wherein: The wrench further comprises a second pawl assembly movably disposed on the wrench body, the second pawl assembly being capable of engaging with the tooth portion so as to cause the driving member and the wrench body to rotate synchronously in the opposite direction of the preset direction; The wrench further includes a reversing assembly disposed on the wrench body, and the reversing assembly is used to change the positions of the first pawl assembly and the second pawl assembly so that at least one of the first pawl assembly and the second pawl assembly can mesh with the tooth portion.

3. The wrench according to claim 2, wherein: The second pawl assembly comprises a third pawl and a fourth pawl arranged along the circumference of the tooth portion, and the third pawl and the fourth pawl are both capable of meshing with the tooth portion; Wherein, when at least a portion of the third pawl is engaged with the tooth portion, at least a portion of the fourth pawl is in a non-completely engaged state with the tooth portion.

4. The wrench according to claim 3, wherein: The wrench body has a groove and a limiting groove extending outward from the inner peripheral wall of the groove, the tooth portion is rotatably disposed in the groove, and the first pawl assembly and the second pawl assembly are movably disposed in the limiting groove; When the wrench body rotates along the preset direction, the first pawl assembly is in meshing state with the tooth portion, and when the first pawl assembly abuts against the inner wall of the limiting groove, the first pawl assembly can be restricted from being disengaged from the tooth portion, so that the driving member and the wrench body rotate synchronously; When the wrench body rotates in the opposite direction of the preset direction, the second pawl assembly is in meshing state with the tooth portion, and when the second pawl assembly abuts against the inner wall of the limiting groove, it can limit the disengagement of the second pawl assembly from the tooth portion, so that the driving member and the wrench body rotate synchronously.

5. The wrench according to claim 4, wherein: The reversing assembly includes a reversing member rotatably disposed on the wrench body, the reversing member being coaxially disposed with the tooth portion, and the reversing member being able to change the positions of the first pawl assembly and the second pawl assembly when rotating so that at least one of the first pawl assembly and the second pawl assembly can engage with the tooth portion.

6. The wrench according to claim 5, wherein: The reversing assembly further comprises a driving portion rotatably arranged in the limiting groove, and the driving portion and the reversing member are driven by tooth meshing.

7. The wrench according to claim 5, wherein: The outer periphery of the switching member includes a raised portion and a recessed portion; The protrusion can be surrounded by the limiting groove to form a limiting space to limit the first pawl assembly or the second pawl assembly from engaging with the tooth portion; The recessed portion can be arranged together with the limiting groove to form an engagement space, so that the first pawl assembly or the second pawl assembly can engage with the tooth portion.

8. The wrench according to claim 5, wherein: The first pawl and the fourth pawl are integrally formed into a first tooth block, and the ratchet teeth of the first pawl and the ratchet teeth of the fourth pawl are sequentially arranged along a first curvature radius on a side of the first tooth block close to the tooth portion; The second pawl and the third pawl are integrally formed into a second tooth block, and the ratchet teeth of the second pawl and the ratchet teeth of the third pawl are sequentially arranged along a second curvature radius on a side of the second tooth block close to the tooth portion; The first radius of curvature is greater than a radius of curvature of the tooth portion, and the second radius of curvature is greater than a radius of curvature of the tooth portion.

9. The wrench according to claim 8, wherein: A group of first mounting grooves and second mounting grooves arranged in a V-shape are provided between the first tooth block and the switching member, and between the second tooth block and the switching member, and an elastic member is provided in each of the first mounting grooves and each of the second mounting grooves; by rotating the switching member along a preset direction or in the opposite direction of the preset direction, the groove pitch of the first mounting grooves in each group along the direction in which the elastic member is arranged is shortened, or the groove pitch of the second mounting grooves in each group along the direction in which the elastic member is arranged is shortened, so as to compress the elastic member, so that part of the ratchet teeth of one of the first tooth block and the second tooth block are meshed with the tooth portion, and part of the ratchet teeth of the other tooth block are not fully meshed with the tooth portion.

10. The wrench according to claim 4, wherein: The reversing assembly includes a driving portion rotatably disposed in the limiting groove, and when the driving portion rotates, the positions of the first pawl assembly and the second pawl assembly can be changed so that at least one of the first pawl assembly and the second pawl assembly can engage with the tooth portion.

11. The wrench according to claim 10, wherein: The reversing assembly further includes a first rotating member and a second rotating member disposed in the limiting groove, and the driving part can drive the first rotating member and the second rotating member to rotate synchronously; The first pawl and the third pawl are disposed at intervals on the outer circumference of the first rotating member, and the second pawl and the fourth pawl are disposed at intervals on the outer circumference of the second rotating member.

12. The wrench according to claim 11, wherein The reversing assembly further includes a first transmission member disposed on the first rotating member and a second transmission member disposed on the second rotating member, and the driving portion is engaged with the first transmission member and the second transmission member through gear transmission.

13. The wrench according to claim 12, wherein: The first rotating member and the second rotating member are both provided with arc grooves, and the first transmission member and the second transmission member are both provided with arc blocks capable of being inserted into the arc grooves, and the arc blocks are clearance-matched with the arc grooves.

14. The wrench according to claim 6 or 10, wherein: The reversing assembly further includes a toggle member movably disposed on the wrench body and connected to the driving portion, and at least a portion of the toggle member extends out of the wrench body.

15. The wrench of claim 1, wherein: The first pawl assembly further includes a fifth pawl capable of engaging with the tooth portion, wherein when one of the first pawl, the second pawl and the fifth pawl is engaged with the tooth portion, the other two pawls are in a non-completely engaged state with the tooth portion.

16. The wrench of claim 1, wherein: The driving member comprises a driving shaft or a driving ring.

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