Wrench

Abstract

The invention relates to a wrench which comprises a wrench body, a driving part, a tooth part, a first pawl assembly and an elastic part, and the driving part is rotatably arranged on the wrench body and used for driving an external element; the tooth part is coaxially arranged on the side face of the driving piece and can rotate synchronously with the driving piece. The first pawl assembly is movably arranged on the wrench body and comprises a first pawl and a second pawl which are arranged in the circumferential direction of the tooth part, the first pawl and the second pawl can be meshed with the tooth part so as to limit the tooth part to rotate relative to the wrench body in the preset direction, and when at least part of the first pawl is meshed with the tooth part, the first pawl and the second pawl can rotate in the preset direction. At least part of the second pawl and the tooth part are in a non-complete meshing state; the elastic piece can apply elastic force to the first pawl and the second pawl, so that the first pawl and the second pawl tend to move towards the side close to the tooth part. The wrench can be used in a narrow operation space while the strength is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of operating tools, and in particular to a wrench. Background Technology

[0002] A wrench is a tool used to tighten or loosen sockets, nuts, bolts, and other components. Existing ratchet wrenches work by engaging the spindle with the socket, nut, or bolt, and then applying force by rotating the handle. The spindle rotates synchronously with the handle to tighten or loosen these components. When operating space is limited, the handle needs to be rotated in the opposite direction by a certain angle. In this position, the spindle is fixed relative to the socket, nut, or bolt. When the handle is rotated back to its initial position, force is applied again to tighten or loosen the component.

[0003] When the handle is rotated in the reverse direction, at least one tooth of the ratchet needs to be turned. However, when the operating space is too small to turn even one tooth, the ratchet wrench cannot be used, thus limiting its application range.

[0004] In some existing technologies, ratchet wrenches increase the number of teeth by reducing the tooth profile, thus achieving the effect of multiple teeth. However, smaller tooth profiles may result in insufficient torque or tooth breakage, leading to poor wrench strength. Summary of the Invention

[0005] Therefore, it is necessary to provide a wrench that can be used in narrow operating spaces while ensuring strength.

[0006] This invention provides a wrench, comprising: a wrench body; a drive member rotatably disposed on the wrench body and used to drive an external component; teeth coaxially disposed on the side of the drive member and capable of rotating synchronously with the drive member; a first pawl assembly movably disposed on the wrench body, the first pawl assembly including a first pawl and a second pawl arranged circumferentially along the teeth, both the first pawl and the second pawl being capable of engaging with the teeth, so that the drive member and the wrench body rotate synchronously in a preset direction, wherein when at least a portion of the first pawl is engaged with the teeth, at least a portion of the second pawl is in a partially engaged state with the teeth; and an elastic member capable of applying an elastic force to the first pawl and the second pawl, so that at least a portion of the first pawl and at least a portion of the second pawl tend to move toward the side of the teeth.

[0007] In the aforementioned wrench, the driving component cooperates with the external component to control the wrench body to rotate in a preset direction. When the first or second pawl engages with the teeth, the driving component and the wrench body rotate synchronously in the preset direction around the center of the driving component. At this time, the driving component can tighten or loosen the external component. Controlling the wrench body to rotate in the opposite direction causes slippage between the teeth and the first and second pawls, allowing the wrench body to rotate independently, while the teeth and driving component remain fixed relative to the external component. When the first pawl engages with the teeth, the second pawl and teeth are in a partially engaged state; conversely, when the second pawl engages with the teeth, the first pawl and teeth are in a partially engaged state. Thus, when the wrench body rotates independently, it only needs to rotate an angle smaller than one tooth groove to again drive the teeth and driving component to rotate synchronously to tighten or loosen the external component, achieving a multi-tooth effect and enabling the wrench to be used in confined operating spaces. The elastic element applies a preload force towards the teeth to the first and second pawls, assisting them in engaging with the teeth. Furthermore, the first and second pawls are arranged circumferentially along the teeth, and their widths are equal to or slightly greater than the width of the teeth, thereby increasing the contact area between the first and second pawls and the teeth. This ensures the transmission strength between the first and second pawls and the teeth, preventing tooth breakage due to insufficient torque between them, thus guaranteeing the strength of the wrench.

[0008] In one embodiment, the wrench further includes a second pawl assembly movably disposed on the wrench body, the second pawl assembly being capable of engaging with the teeth to cause the drive member and the wrench body to rotate synchronously in opposite directions along the preset direction; the wrench further includes a reversing component disposed on the wrench body, the reversing component being used to change the position 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 engage with the teeth.

[0009] With this configuration, when the reversing component controls the first pawl assembly to engage with the teeth, the wrench can rotate in the opposite direction of the preset direction to tighten or loosen the external component. When the reversing component controls the second pawl assembly to engage with the teeth, the wrench can rotate in the preset direction to tighten or loosen the external component, thereby enabling convenient operation and easy use of the wrench.

[0010] In one embodiment, the second pawl assembly includes a third pawl and a fourth pawl arranged circumferentially along the teeth, both of which are capable of engaging with the teeth; wherein, when at least a portion of the third pawl is engaged with the teeth, at least a portion of the fourth pawl is in a partially engaged state with the teeth.

[0011] With this configuration, when the wrench body rotates in the opposite direction along the preset direction, it only needs to rotate half the angle of the tooth groove to rotate again in the preset direction to tighten or loosen the external component, thereby achieving the effect of multiple teeth and enabling the wrench to be used in narrow operating spaces.

[0012] In one embodiment, the wrench body has a groove and a limiting groove extending outward from the inner peripheral wall of the groove. The teeth are 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 and the teeth are engaged. When the first pawl assembly abuts against the inner wall of the limiting groove, it can prevent the first pawl assembly from disengaging from the teeth, so that the driving member rotates synchronously with the wrench body. When the wrench body rotates in the opposite direction along the preset direction, the second pawl assembly and the teeth are engaged. When the second pawl assembly abuts against the inner wall of the limiting groove, it can prevent the second pawl assembly from disengaging from the teeth, so that the driving member rotates synchronously with the wrench body.

[0013] With this configuration, the limiting groove is used to limit the range of motion of the first pawl assembly and the second pawl assembly, so as to prevent the first pawl assembly and the second pawl assembly from disengaging from the teeth when they abut against the inner wall of the limiting groove, thereby allowing the drive component to rotate synchronously with the wrench body.

[0014] In one embodiment, the reversing assembly includes a reversing member rotatably disposed on the wrench body, the reversing member being coaxially disposed with the teeth, and the reversing member being able to change the position 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 teeth.

[0015] With this configuration, the engagement of the first pawl assembly with the teeth or the second pawl assembly with the teeth can be switched by rotating the reversing component. The adjustment method is simple and convenient, and the number of parts is small.

[0016] In one embodiment, the reversing assembly further includes a drive unit rotatably disposed within the limiting groove, the drive unit being driven by the reversing member through gear meshing.

[0017] With this configuration, driving the commutator by meshing the drive component with the commutator can avoid interference with the teeth or drive component caused by directly driving the commutator.

[0018] In one embodiment, the outer periphery of the reversing member includes a protrusion and a recess; the protrusion can form a limiting space with the limiting groove to restrict the first pawl assembly or the second pawl assembly from engaging with the teeth; the recess can form an engagement space with the limiting groove to allow the first pawl assembly or the second pawl assembly to engage with the teeth.

[0019] With this configuration, rotating the reversing component allows the protrusions and recesses of the reversing component to relatively change the positions of the first pawl assembly and the second pawl assembly. The protrusions keep the first and second pawl assemblies a certain distance from the teeth so that they cannot mesh with the teeth; the recesses shorten the distance between the first and second pawl assemblies and the teeth to a state where they can mesh.

[0020] In one embodiment, 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 fourth pawl are sequentially arranged along a first radius of curvature on the side of the first tooth block near 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 third pawl are sequentially arranged along a second radius of curvature on the side of the second tooth block near the tooth portion; the first radius of curvature is larger than the radius of curvature of the tooth portion, and the second radius of curvature is larger than the radius of curvature of the tooth portion.

[0021] With this configuration, the synchronization between the first and second pawl assemblies is better, the number of structural parts is effectively reduced, assembly is easier, and the cooperation between the two and the reversing assembly is simpler, more stable, and easier to control the reversing.

[0022] In one embodiment, a set of V-shaped first mounting grooves and second mounting grooves are provided between the first tooth block and the reversing member, and between the second tooth block and the reversing member. Each first mounting groove and each second mounting groove contains an elastic member. When the reversing member is rotated along a preset direction or in the opposite direction of the preset direction, the groove spacing of the first mounting groove in each set along the direction of the elastic member is shortened, or the groove spacing of the second mounting groove in each set along the direction of the elastic member is shortened, so as to compress the elastic member, so that part of the ratchet of one of the first tooth block and the second tooth block engages with the tooth, while part of the ratchet of the other tooth block does not fully engage with the tooth.

[0023] With this configuration, since the first and second radii of curvature are larger than the radius of curvature of the tooth, the reversing component can compress the elastic element in the first or second mounting groove when reversing. This causes one side of the first tooth block and one side of the second tooth block to rotate closer to the tooth under the elastic force of the elastic element. This allows one of the ratchet teeth of the first tooth block and the second tooth block to mesh with the tooth, while the other side can not fully mesh with the tooth. Meanwhile, the other side of the first tooth block and the other side of the second tooth block will rotate in the opposite direction and lift up, moving away from the tooth, and thus separating from or partially separating from the tooth.

[0024] In one embodiment, the reversing assembly includes a drive portion rotatably disposed within the limiting groove, which, when rotated, can 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 engage with the teeth.

[0025] With this configuration, the engagement of the first pawl assembly with the teeth or the second pawl assembly with the teeth can be switched by rotating the drive unit. The adjustment method is simple and convenient, and the number of parts is small.

[0026] In one embodiment, the reversing assembly further includes a first rotating member and a second rotating member disposed within the limiting groove, and the driving unit is capable of driving the first rotating member and the second rotating member to rotate synchronously; the first pawl and the third pawl are spaced apart on the outer periphery of the first rotating member, and the second pawl and the fourth pawl are spaced apart on the outer periphery of the second rotating member.

[0027] With this configuration, the engagement of the first pawl assembly with the teeth or the second pawl assembly with the teeth can be switched by rotating the first rotating component and the second rotating component. The adjustment method is simple and convenient, and it is easy to manufacture and process.

[0028] In one embodiment, 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. The reversing assembly also includes a driving part rotatably disposed in the limiting groove, and the driving part is driven by the first transmission member and the second transmission member through gear meshing.

[0029] This configuration controls the rotation of the first and second rotating parts through gear meshing, ensuring that the first and second rotating parts can rotate synchronously. Furthermore, the gear structure is simple and easy to manufacture.

[0030] In one embodiment, both the first rotating member and the second rotating member are provided with arc-shaped grooves, and both the first transmission member and the second transmission member are provided with arc-shaped blocks that can be inserted into the arc-shaped grooves, with the arc-shaped blocks and the arc-shaped grooves being in clearance fit.

[0031] With this configuration, there is a certain amount of rotation space between the first rotating component and the first transmission component, as well as between the second rotating component and the second transmission component. When the pawl slips on the teeth, the first rotating component and the second rotating component can rotate independently without affecting other structures.

[0032] In one embodiment, the reversing assembly further includes an actuating member movably disposed with respect to the wrench body and connected to the drive unit, at least a portion of the actuating member extending beyond the wrench body.

[0033] With this design, the user can drive the reversing element to rotate inside the wrench body by moving the actuating part outside the wrench body, making operation convenient.

[0034] In one embodiment, the first pawl assembly further includes a fifth pawl capable of engaging with the teeth, wherein when one of the first pawl, the second pawl, and the fifth pawl engages with the teeth, the other two are in a state of incomplete engagement with the teeth.

[0035] This design allows for the use of more teeth, enabling the wrench to operate in narrower spaces and further expanding its applicability.

[0036] In one embodiment, the drive element includes a drive shaft or a drive ring.

[0037] This design expands the wrench's applicability. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a three-dimensional structural diagram of a wrench according to one embodiment of the present invention;

[0040] Figure 2 Provided by the present invention Figure 1 A schematic diagram of the structure from a rear-view perspective;

[0041] Figure 3 A partial structural diagram of the first embodiment of the present invention. Figure 1 ;

[0042] Figure 4 A partial structural diagram of the first embodiment of the present invention. Figure 2 ;

[0043] Figure 5 A partial structural diagram of the first embodiment of the present invention. Figure 3 ;

[0044] Figure 6 A partial structural diagram of the first embodiment of the present invention. Figure 4 ;

[0045] Figure 7 A partial three-dimensional structural schematic diagram of the first embodiment of the present invention;

[0046] Figure 8 Provided by the present invention Figure 7 A schematic diagram of the cross-sectional structure;

[0047] Figure 9 A partial structural schematic diagram of the second embodiment of the present invention;

[0048] Figure 10 A partial three-dimensional structural schematic diagram of the second embodiment of the present invention;

[0049] Figure 11 Provided by the present invention Figure 10 A schematic diagram of the cross-sectional structure;

[0050] Figure 12 A partial structural schematic diagram of the third embodiment of the present invention;

[0051] Figure 13 A partial structural diagram of the fourth embodiment of the present invention. Figure 1 ;

[0052] Figure 14 A partial structural diagram of the fourth embodiment of the present invention. Figure 2 ;

[0053] Figure 15 Provided by the present invention Figure 13 A schematic diagram of the cross-sectional structure;

[0054] Figure 16 A partial three-dimensional structural schematic diagram of the fourth embodiment of the present invention;

[0055] Figure 17 A cross-sectional structural schematic diagram of the fifth embodiment of the present invention;

[0056] Figure 18 Provided by the present invention Figure 2 A schematic diagram of the cross-sectional structure;

[0057] Figure 19A schematic diagram of the structure of the sixth embodiment of the present invention;

[0058] Figure 20 for Figure 19 Exploded structure diagram of a medium-sized wrench;

[0059] Figure 21 for Figure 19 A structural diagram of a center wrench from another perspective;

[0060] Figure 22 for Figure 21 A partial cross-sectional view of a medium-sized wrench with section line AA as the cutting line;

[0061] Figure 23 for Figure 21 A partial cross-sectional view of a medium-sized wrench with BB as the cutting line;

[0062] Figure 24 for Figure 19 Partial structural diagram of the middle wrench Figure 1 ;

[0063] Figure 25 for Figure 19 Partial structural diagram of the middle wrench Figure 2 ;

[0064] Figure 26 for Figure 19 A structural diagram of a center wrench in another configuration;

[0065] Figure 27 for Figure 26 A partial cross-sectional structural diagram of a medium-sized wrench.

[0066] Reference numerals: 100, wrench; 1, wrench body; 11, groove; 12, limiting groove; 13, handle; 14, operating part; 141, sealing plate; 2, driving component; 3, teeth; 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 toothed block; 50, second toothed block; 405, ratchet tooth; 101, first mounting groove; 1011, first groove; 1012, second groove. ; 102, Second mounting groove; 1021, Third groove; 1022, Fourth groove; 601, Restriction space; 602, Engaging space; 6, Reversing assembly; 61, Reversing member; 611, Protrusion; 612, Recess; 62, Driving part; 621, Protrusion; 622, Recess; 63, First rotating member; 64, Second rotating member; 65, First transmission member; 66, Second transmission member; 67, Arc-shaped groove; 68, Arc-shaped block; 69, Actuating member; 7, Elastic member; 71, First elastic member; 72, Second elastic member. Detailed Implementation

[0067] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0068] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0069] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0071] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0072] Existing ratchet wrenches work by engaging a spindle with sockets, nuts, and bolts, and then applying force through a rotating handle. The spindle rotates synchronously with the handle to tighten or loosen these components. When operating space is limited, the handle needs to be rotated in the opposite direction. In this position, the spindle is fixed relative to the socket, nut, or bolt. When the handle returns to its initial position, it is rotated again to apply force and tighten or loosen the component. Reversing the handle requires at least one tooth rotation of the ratchet. However, when operating space is too confined to rotate even one tooth, the ratchet wrench cannot be used, thus limiting its application.

[0073] In existing technologies, some ratchet wrenches increase the number of teeth by reducing the tooth profile, achieving a multi-tooth effect. However, a smaller tooth profile may result in insufficient torque or tooth breakage, leading to poor wrench strength. Other ratchet wrenches have two pawls arranged side-by-side along the ratchet's axis, with a lateral angular offset. While this achieves a multi-tooth effect, the width of each pawl is only half the width of the ratchet. This results in a small contact area between each pawl and the ratchet, reducing the transmission strength between them and still causing poor wrench strength and susceptibility to damage.

[0074] To solve the above problems, such as Figures 1 to 16 As shown, the present invention provides a wrench 100 that can be used in narrow operating spaces while ensuring strength.

[0075] like Figure 1 and Figure 4 As shown, specifically, the wrench 100 includes a wrench body 1, a driving member 2, teeth 3, a first pawl assembly 4, and an elastic member 7. The driving member 2 is rotatably disposed on the wrench body 1 and is used to drive external components. The teeth 3 are coaxially disposed on the side of the driving member 2 and can rotate synchronously with the driving member 2. The first pawl assembly 4 is movably disposed on the wrench body 1 and includes a first pawl 41 and a second pawl 42 arranged circumferentially along the teeth 3. Both the first pawl 41 and the second pawl 42 can engage with the teeth 3 so that the driving member 2 and the wrench body 1 rotate synchronously in a preset direction (i.e., along...). Figure 4 The diagram shows a rotation around the axis of the drive member 2 (rotating in the -A direction). When the first pawl 41 is engaged with the tooth 3, the second pawl 42 is not fully engaged with the tooth 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 tend to move towards the tooth 3.

[0076] Among them, such as Figures 1 to 2As shown, the wrench body 1 includes a handle 13 and an operating part 14 disposed at one end of the handle 13, and a driving member 2 is disposed on the operating part 14.

[0077] Drive component 2 mates with components such as sleeves, nuts, and bolts. Control handle 13 rotates around the axis of drive component 2. Figure 4 As shown, rotation in the -A direction allows the drive component 2 and the wrench body 1 to rotate synchronously in the -A direction when the first pawl 41 and the second pawl 42 engage with the teeth 3. At this time, the drive component 2 can tighten or loosen components such as sockets, nuts, and bolts. The control handle 13 rotates around the axis of the drive component 2. Figure 4 When rotated in the +A direction as shown, the teeth 3 slip between the first pawl 41 and the second pawl 42. Therefore, the wrench body 1 can rotate independently along... Figure 4 The gear 3 and the drive component 2 rotate in the +A direction as shown, while the gear 3 and the drive component 2 are fixed relative to components such as sleeves, nuts and bolts.

[0078] As mentioned earlier, in the existing ratchet wrench 100, when the handle rotates in the reverse direction, at least one tooth of the ratchet needs to be rotated. However, when the operating space is too small to rotate even one tooth, the ratchet wrench 100 cannot be used, thus limiting its application range. In the wrench 100 provided in this embodiment of the invention, when the first pawl 41 engages with the tooth 3, the second pawl 42 is in a partially engaged state with the tooth 3, and when the second pawl 42 engages with the tooth 3, the first pawl 41 is in a partially engaged state with the tooth 3. Thus, the wrench body 1 moves along... Figure 4 When rotating in the +A direction as shown, only an angle smaller than one tooth groove of tooth 3 is needed to rotate it again along the direction. Figure 4 Rotating in the -A direction as shown tightens or loosens components such as sockets, nuts, and bolts, achieving a multi-tooth effect, thereby enabling the wrench 100 to be used in confined operating spaces. The elastic element 7 can apply a preload force toward the teeth 3 to the first pawl 41 and the second pawl 42, causing the first pawl 41 and the second pawl 42 to tend to move toward the teeth 3, assisting the first pawl 41 and the second pawl 42 in engaging with the teeth 3.

[0079] Furthermore, compared to existing technologies that increase the number of teeth by reducing the tooth profile or by arranging two pawls with lateral angular offsets side by side along the axial direction of the ratchet, the wrench 100 provided by the present invention does not require changing the size of the tooth profile of the tooth portion 3. Moreover, the first pawl 41 and the second pawl 42 are arranged circumferentially along 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, and avoiding tooth breakage due to insufficient torque between the first pawl 41 and the second pawl 42 and the tooth portion 3, thereby ensuring the strength of the wrench 100.

[0080] In the illustrated embodiment, when the first pawl 41 engages with the toothed portion 3, i.e., when the tip of the tooth of the first pawl 41 is opposite to the bottom of the tooth groove of the toothed portion 3, the tip of the tooth of the second pawl 42 is opposite to the tip of the tooth of the toothed portion 3; when the second pawl 42 engages with the toothed portion 3, i.e., when the tip of the tooth of the second pawl 42 is opposite to the bottom of the tooth groove of the toothed portion 3, the tip of the tooth of the first pawl 41 is opposite to the tip of the tooth of the toothed portion 3. The wrench body 1 moves along... Figure 4 When rotating in the +A direction as shown, only half the angle of the tooth groove of tooth 3 needs to be rotated to rotate again along... Figure 4 The wrench 100 can be rotated in the -A direction to tighten or loosen components such as sockets, nuts, and bolts, thereby enabling its use in confined operating spaces. Alternatively, in other embodiments, when the tooth tip of the first pawl 41 engages with the tooth groove of the tooth portion 3, the tooth tip of the second pawl 42 may be opposite to the sidewall of the tooth groove of the tooth portion 3; or when the tooth tip of the second pawl 42 engages with the tooth groove of the tooth portion 3, the tooth tip of the first pawl 41 may be opposite to the sidewall of the tooth groove of the tooth portion 3.

[0081] The driving component 2 includes a drive shaft or a drive ring. For example... Figure 18 As shown, the drive shaft can be a solid shaft or a non-solid shaft. The drive shaft can be inserted into external components such as screws, while a non-solid shaft can house other components; for example... Figure 17 As shown, the drive ring has a through hole in its center, allowing it to be fitted onto the outside of external components such as nuts. This expands the applicability of the wrench 100. The drive component 2 can be integrally formed with the toothed part 3, or the drive component 2 and the toothed part 3 can be separate structures, connected by screws, adhesives, or other fixing or fitting methods.

[0082] like Figure 4 and Figure 6 As shown, the wrench 100 also includes a second pawl assembly 5 movably disposed on the wrench body 1. The second pawl assembly 5 can engage with the teeth 3 to cause the drive member 2 and the wrench body 1 to rotate synchronously in opposite directions along a preset direction (i.e., along...). Figure 6The wrench 100, shown as rotating around the axis of the drive member 2 in the +A direction, also includes a reversing assembly 6 disposed on the wrench body 1. The reversing assembly 6 is used to 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 teeth 3. When the reversing assembly 6 controls the first pawl assembly 4 to engage with the teeth 3, the wrench body 1 can rotate in the +A direction. Figure 4 The wrench body 1 rotates in the -A direction as shown to tighten or loosen components such as sleeves, nuts, and bolts via the drive component 2. When the reversing assembly 6 controls the second pawl assembly 5 to engage with the teeth 3, the wrench body 1 can move along... Figure 6 Rotating in the +A direction as shown allows the drive component 2 to tighten or loosen components such as sockets, nuts, and bolts. This enables the wrench 100 to be easily operated and convenient to use.

[0083] Specifically, the second pawl assembly 5 includes a third pawl 51 and a fourth pawl 52 arranged circumferentially along the tooth portion 3. Both the third pawl 51 and the fourth pawl 52 can engage with the tooth portion 3. When the third pawl 51 engages with the tooth portion 3, the fourth pawl 52 is in a partially engaged state with the tooth portion 3; conversely, when the fourth pawl 52 engages with the tooth portion 3, the third pawl 51 is in a partially engaged state with the tooth portion 3. In the illustrated embodiment, when the third pawl 51 engages with the tooth portion 3 (i.e., the tip of the third pawl 51 is opposite to the bottom of the tooth groove of the tooth portion 3), the tip of the fourth pawl 52 is opposite to the tip of the tooth portion 3; when the fourth pawl 52 engages with the tooth portion 3 (i.e., the tip of the fourth pawl 52 is opposite to the bottom of the tooth groove of the tooth portion 3), the tip of the third pawl 51 is opposite to the tip of the tooth portion 3. Thus, the wrench body 1 moves along... Figure 6 When rotating in the -A direction as shown, only half the angle of the tooth groove of tooth 3 needs to be rotated to rotate again along the direction. Figure 6 Rotating in the +A direction as shown allows for tightening or loosening of components such as sockets, nuts, and bolts, thereby enabling the use of the wrench 100 in confined operating spaces. Alternatively, in other embodiments, when the tip of the third pawl 51 engages with the tooth groove of the toothed portion 3, the tip of the fourth pawl 52 may be opposite to the sidewall of the tooth groove of the toothed portion 3; or when the tip of the fourth pawl 52 engages with the tooth groove of the toothed portion 3, the tip of the third pawl 51 may be opposite to the sidewall of the tooth groove of the toothed portion 3.

[0084] When the third pawl 51 and the fourth pawl 52 engage with the teeth 3, the control handle 13 rotates around the axis of the drive member 2. Figure 6 When the +A direction is rotated, the third pawl 51 and the fourth pawl 52 engage with the toothed part 3, causing the drive component 2 and the wrench body 1 to rotate synchronously in the +A direction. At this time, the drive component 2 can tighten or loosen components such as sockets, nuts, and bolts. The control handle 13 rotates around the axis of the drive component 2. Figure 6When rotated in the -A direction as shown, the tooth 3 slips between the third pawl 51 and the fourth pawl 52, thus the wrench body 1 can rotate independently along... Figure 6 The gear 3 and the drive component 2 rotate in the -A direction as shown, while the gear 3 and the drive component 2 are fixed relative to components such as sleeves, nuts and bolts.

[0085] like Figures 3 to 8 As shown, in one embodiment, the wrench body 1 has a groove 11 and two limiting grooves 12 extending outward from the inner peripheral wall of the groove 11. The teeth 3 are rotatably disposed in the groove 11. The first pawl 41 and the third pawl 51 are movably disposed in one of the limiting grooves 12, and the second pawl 42 and the fourth pawl 52 are movably disposed in the other limiting groove 12. An elastic element 7 is provided between the first pawl 41 and the third pawl 51. When the first pawl 41 or the third pawl 51 disengages from the teeth 3, it will move toward the side closer to the other, so that the corresponding elastic element 7 is further compressed. An elastic element 7 is provided between the second pawl 42 and the fourth pawl 52. When the second pawl 42 or the fourth pawl 52 disengages from the teeth 3, it will move toward the side closer to the other, so that the corresponding elastic element 7 is further compressed.

[0086] like Figures 9 to 11 As shown, in another embodiment, the wrench body 1 may also have four limiting grooves 12 extending outward from the inner peripheral wall of the groove 11. The first pawl 41, the second pawl 42, the third pawl 51 and the fourth pawl 52 are slidably disposed in the four limiting grooves 12 along the circumference of the tooth 3. Each pawl is provided with an elastic element 7 between itself 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 3, they will move toward the side away from the tooth 3 so that the corresponding elastic element 7 is further compressed.

[0087] like Figures 7 to 8 and Figures 10 to 11 As shown, the commutation assembly 6 includes a commutation member 61 rotatably disposed within the groove 11. The commutation member 61 is coaxially disposed with the toothed portion 3 and is capable of moving along... Figure 4 The rotation is shown in the ±A direction. 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 teeth 3. For example... Figure 3 , Figure 5 and Figure 9 As shown, the commutation assembly 6 also includes a drive unit 62 rotatably disposed in the limiting groove 12. The drive unit 62 and the commutation member 61 are driven by gear meshing. The drive unit 62 rotates around its own axis along... Figure 3Rotation in the ±B direction is shown. Since the first pawl assembly 4 and the second pawl assembly 5 are arranged circumferentially along the tooth 3, the coaxiality of the reversing member 61 with the tooth 3 facilitates the control of the meshing of the first pawl assembly 4 and the second pawl assembly 5 with the tooth 3; driving the reversing member 61 by meshing the driving part 62 with the reversing member 61 can avoid interference with the tooth 3 or the driving part 2 caused by directly driving the reversing member 61.

[0088] like Figures 7 to 8 and Figures 10 to 11 As shown, the outer periphery of the reversing member 61 includes a protrusion 611 and a recess 612; the protrusion 611 can form a limiting space 601 with the limiting groove 12 to limit the engagement of the first pawl assembly 4 or the second pawl assembly 5 with the teeth 3; the recess 612 can form an engagement space 602 with the limiting groove 12 to allow the first pawl assembly 4 or the second pawl assembly 5 to engage with the teeth 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 engages with the first pawl 41 and the second pawl 42. The protrusion 611 can push the first pawl 41 and the second pawl 42 away from the tooth 3 and separate them from the tooth 3, so as to limit the engagement of the first pawl 41 and the second pawl 42 with the tooth 3. The reversing member 61 overcomes the elastic force of the elastic member 7 and further compresses it. At the same time, the third pawl 51 and the fourth pawl 52 are located in the meshing space 602. The recess 612 engages 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 towards the side closer to the tooth 3 and engage with the tooth 3.

[0089] When the reversing member 61 rotates to the position where the third pawl 51 and the fourth pawl 52 are in the restricted space 601, the protrusion 611 engages with the third pawl 51 and the fourth pawl 52. The protrusion 611 can push the third pawl 51 and the fourth pawl 52 away from the tooth 3 and separate them from the tooth 3, thereby restricting the third pawl 51 and the fourth pawl 52 from meshing with the tooth 3. The reversing member 61 overcomes the elastic force of the elastic member 7 and further compresses it. At the same time, the first pawl 41 and the second pawl 42 are in the meshing space 602, and the recess 612 engages 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 towards the side closer to the tooth 3 and mesh with the tooth 3.

[0090] Among them, such as Figure 9 and Figure 11As shown, the protrusion 611 and the recess 612 are connected by an inclined surface to serve as a guide, facilitating the reversing member 61 to push the pawl. Alternatively, the pawl can also be provided with an inclined surface or guide that can engage with the inclined surface between the protrusion 611 and the recess 612, further facilitating the reversing member 61 to push the pawl. The adjustment method of switching between the engagement of the first pawl assembly 4 and the tooth 3 or the engagement of the second pawl assembly 5 and the tooth 3 via the reversing member 61 is simple and convenient, and the number of parts is small, making it easy to manufacture and assemble.

[0091] like Figures 2 to 3 As shown, the reversing assembly 6 also includes an actuating member 69 movably disposed on the wrench body 1 and connected to the drive unit 62, with at least a portion of the actuating member 69 extending outside the wrench body 1. The user can drive the drive unit 62 to rotate within the wrench body 1 by actuating the actuating member 69 from outside the wrench body 1, making operation convenient.

[0092] In other words, the wrench 100 has a first use state where it rotates in a preset direction and a second use state where 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 toothed portion 3, and at least some of the ratchet teeth of the second pawl 42 are not fully engaged with the toothed portion 3. In the second use state, at least some of the ratchet teeth of the third pawl 51 are fully engaged with the toothed portion 3, and at least some of the ratchet teeth of the fourth pawl 52 are not fully engaged with the toothed portion 3. The actuating member 69 of the reversing assembly 6 can drive the driving part 62 to rotate the reversing member 61 within the wrench body 1, thereby changing the engagement position of the first pawl 41 and the second pawl 42, the third pawl 51 and the fourth pawl 52 with the toothed portion 3, so that the wrench 100 can switch between the first use state and the second use state.

[0093] like Figure 12 As shown, in another embodiment, the wrench body 1 may also have a limiting groove 12 extending outward from the inner peripheral wall of the groove 11. A first pawl 41, a second pawl 42, a third pawl 51, and a fourth pawl 52 are sequentially arranged circumferentially within the limiting groove 12 along the tooth portion 3. Each pawl is rotatable along its own axis, and an elastic element 7 is provided between each pawl and the inner wall of the limiting groove 12. The reversing assembly 6 includes a driving part 62 rotatably disposed within the limiting groove 12. The driving part 62 is rotatable around its own axis along... Figure 12The rotation is shown in the ±C direction. The drive unit 62 is located between the second pawl 42 and the third pawl 51. The outer periphery of the drive unit 62 includes a protrusion 621 and a recess 622 that can engage with the second pawl 42 and the third pawl 51. When the drive unit 62 rotates to the point where the protrusion 621 engages with the second pawl 42, the protrusion 621 can push the second pawl 42 away from the tooth 3 and separate it from the tooth 3. The second pawl 42 can push the first pawl 41 away from the tooth 3 and separate it from the tooth 3. The drive unit 62 overcomes the elastic force of the elastic member 7 and further compresses it. At the same time, the recess 622 corresponds to the third pawl 51. The third pawl 51 can contact or be spaced a distance from the recess 622. Under the action of the elastic member 7, the third pawl 51 and the fourth pawl 52 move towards the tooth 3 and can engage with the tooth 3. When the drive unit 62 rotates to the point where the protrusion 621 engages with the third pawl 51, the protrusion 621 can push the third pawl 51 away from the tooth 3 and separate it from the tooth 3. The third pawl 51 can push the fourth pawl 52 away from the tooth 3 and separate it from the tooth 3. The drive unit 62 overcomes the elastic force of the elastic member 7 and further compresses it. At the same time, the recess 622 corresponds to the second pawl 42. The second pawl 42 can contact or be spaced a distance from the recess 622. The first pawl 41 and the second pawl 42 move towards the tooth 3 under the action of the elastic member 7 and can engage with the tooth 3.

[0094] like Figure 2 and Figure 12 As shown, the reversing assembly 6 also includes an actuating member 69 movably disposed on the wrench body 1 and connected to the reversing member 61, with at least a portion of the actuating member 69 extending outside the wrench body 1. The user can drive the reversing member 61 to rotate within the wrench body 1 by actuating the actuating member 69 from outside the wrench body 1, making operation convenient. Furthermore, the operating part 14 also includes a sealing plate 141, which is used to close one side of the groove 11 and the limiting groove 12 to prevent the teeth 3 and the reversing assembly 6 from dislodging.

[0095] Among them, the aforementioned elastic element 7 can be set as a spring, rubber part, silicone part or other elastic element, and no specific restrictions are made here.

[0096] like Figures 13 to 16 As shown, 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. 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 rotating synchronously around their own axis. The first rotating member 63 is capable of rotating along... Figure 13 The second rotating member 64 can rotate in the ±E direction as shown. Figure 13The rotation is in the ±F direction as shown. 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. The inner walls of the two limiting grooves 12 are respectively provided with grooves, and elastic elements 7, such as elastic balls or elastic protrusions, are provided in the grooves. Part of the elastic ball or its end protrudes from the groove. When the first rotating member 63 or the second rotating member 64 compresses the elastic ball during rotation, the elastic ball can be compressed within the groove and apply an elastic force to the first rotating member 63 or the second rotating member 64, causing the first rotating member 63 or the second rotating member 64 to have a tendency to rotate in the opposite direction.

[0097] like Figure 16 As shown, 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. The first transmission member 65 is coaxially disposed with the first rotating member 63 and is rotatable about its own axis. The second transmission member 66 is coaxially disposed with the second rotating member 64 and is rotatable about its own axis. The wrench body 1 also has a drive groove communicating with two limiting grooves 12. The reversing assembly 6 further includes a drive part 62 rotatably disposed within the drive groove. The drive part 62 is driven by gear meshing with the first transmission member 65 and the second transmission member 66. The drive part 62 is rotatable about its own axis. Figure 13 The rotation is in the ±D direction as shown. The engagement of the first pawl assembly 4 with the toothed part 3 or the second pawl assembly 5 with the toothed part 3 is switched by the rotation of the first rotating member 63 and the second rotating member 64. The adjustment method is simple and convenient. Furthermore, the rotation of the first rotating member 63 and the second rotating member 64 is controlled by gear meshing transmission, ensuring that the first rotating member 63 and the second rotating member 64 can rotate synchronously. The gear structure is simple and easy to manufacture. The reversing assembly 6 also includes a toggle member 69 connected to the drive unit 62. At least part of the toggle member 69 extends outside the wrench body 1, and the toggle member 69 can rotate around its own axis along... Figure 13 The rotation is shown in the ±D direction. The user can drive the drive unit 62 to rotate inside the wrench body 1 by moving the actuating member 69 outside the wrench body 1, which is convenient to operate.

[0098] like Figures 13 to 14As shown, when the user rotates the toggle member 69 in the +D direction, the toggle member 69 drives the drive unit 62 to rotate in the +D direction. The drive unit 62 drives the first transmission member 65 to rotate in the -E direction, and simultaneously drives the second transmission member 66 to rotate in the -F direction. This causes 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 first pawl 41 and the second pawl 42 can engage with the teeth 3. When the user rotates the toggle member 69 in the -D direction, the toggle member 69 drives the drive unit 62 to rotate in the -D direction. The drive unit 62 drives the first transmission member 65 to rotate in the +E direction, and simultaneously drives the second transmission member 66 to rotate in the +F direction. This causes 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 teeth 3.

[0099] like Figure 13 As shown, when the first pawl 41 and the second pawl 42 can engage with the tooth 3, the tooth 3 can rotate in the -A direction. At this time, when the tooth tip of the tooth 3 is opposite to the tooth tip of the first pawl 41 or the second pawl 42, the tooth 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 and slips from the tooth 3. The elastic ball corresponding to the first rotating member 63 or the second rotating member 64 is compressed and applies an elastic force to the first rotating member 63 or the second rotating member 64, so that the first rotating member 63 has a tendency to rotate in the -E direction or the second rotating member 64 has a tendency to rotate in the -F direction. When the tooth tip of the first pawl 41 or the second pawl 42 corresponds to the tooth groove of the tooth 3, under the action of the elastic ball, the first rotating member 63 can be pushed to rotate in the -E direction or the second rotating member 64 can be pushed to rotate in the -F direction, so that the first pawl 41 or the second pawl 42 engages with the tooth 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 toothed part 3. At this time, the wrench body 1 can drive the toothed part 3 and the driving member 2 to rotate synchronously in the +A direction to tighten or loosen components such as sleeves, nuts and bolts.

[0100] like Figure 14As shown, when the third pawl 51 and the fourth pawl 52 can engage with the tooth 3, the tooth 3 can rotate in the +A direction. At this time, when the tooth tip of the tooth 3 is opposite to the tooth tip of the third pawl 51 or the fourth pawl 52, the tooth 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 and slips from the tooth 3. The elastic ball corresponding to the first rotating member 63 or the second rotating member 64 is compressed and applies an elastic force to the first rotating member 63 or the second rotating member 64, so that the first rotating member 63 has a tendency to rotate in the +E direction or the second rotating member 64 has a tendency to rotate in the +F direction. When the tooth tip of the third pawl 51 or the fourth pawl 52 corresponds to the tooth groove of the tooth 3, under the action of the elastic ball, the first rotating member 63 can be pushed to rotate in the +E direction or the second rotating member 64 can be pushed to rotate in the +F direction, so that the third pawl 51 or the fourth pawl 52 engages with the tooth 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 toothed part 3. At this time, the wrench body 1 can drive the toothed part 3 and the driving member 2 to rotate synchronously in the -A direction to tighten or loosen components such as sleeves, nuts and bolts.

[0101] like Figures 15 to 16 As shown, both the first rotating member 63 and the second rotating member 64 are provided with arc-shaped grooves 67. The arc-shaped groove 67 of the first rotating member 63 is concentrically arranged with the first rotating member 63, and the arc-shaped groove 67 of the second rotating member 64 is concentrically arranged with the second rotating member 64. Both the first transmission member 65 and the second transmission member 66 are provided with arc-shaped blocks 68 that can be engaged with the arc-shaped grooves 67, and the arc-shaped blocks 68 are in clearance fit with the arc-shaped grooves 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 slips with the tooth 3, 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 to rotate. This avoids the situation where if one of the first transmission member 65 or the second transmission member 66 is driven to rotate by the first rotating member 63 or the second rotating member 64, it will drive the drive unit 62 to rotate, thereby driving the other to rotate synchronously and affecting the normal meshing of the pawl and the tooth 3. When the first transmission member 65 and the second transmission member 66 rotate, they can push the side wall of the arc groove 67 through the arc block 68, thereby driving the first rotating member 63 and the second rotating member 64 to rotate.

[0102] like Figures 15 to 16As shown in the illustrated embodiment, both the first rotating member 63 and the second rotating member 64 have two arc-shaped grooves 67, and both the first transmission member 65 and the second transmission member 66 have two arc-shaped blocks 68 corresponding to the arc-shaped grooves 67. 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, one, three or more arc-shaped grooves 67 may be provided on the first rotating member 63 and the second rotating member 64. Different numbers of arc-shaped grooves 67 may also be provided on the first rotating member 63 and the second rotating member 64. Arc-shaped blocks 68 are provided on the first transmission member 65 and the second transmission member 66 in a number and position corresponding to the arc-shaped grooves 67. When multiple arc-shaped grooves 67 are provided on the first rotating member 63 or the second rotating member 64, the multiple arc-shaped 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.

[0103] like Figure 17 As shown, the first pawl assembly 4 further includes a fifth pawl 43 capable of engaging with the teeth 3. The first pawl 41, the second pawl 42, and the fifth pawl 43 are arranged at intervals along the outer periphery of the teeth 3. When the first pawl 41 or the second pawl 42 engages with the teeth 3, the fifth pawl 43 is in a partially engaged state with the teeth 3. The second pawl assembly 5 further includes a sixth pawl 53 capable of engaging with the teeth 3. The third pawl 51, the fourth pawl 52, and the sixth pawl 53 are arranged at intervals along the outer periphery of the teeth 3. When the third pawl 51 or the fourth pawl 52 engages with the teeth 3, the sixth pawl 53 is in a non-engaged state with the teeth 3.

[0104] In one embodiment, with the three sets of pawl assemblies evenly distributed along the groove 11, when the reversing component 6 controls the first pawl assembly 4 to engage with the tooth 3, one of the first pawl 41, the second pawl 42, and the fifth pawl 43 may be fully engaged with the tooth 3, while the other two may be engaged with 2 / 3 and 1 / 3 of the tooth 3, respectively. When the reversing component 6 controls the second pawl assembly 5 to engage with the tooth 3, one of the third pawl 51, the fourth pawl 52, and the sixth pawl 53 may be fully engaged with the tooth 3, while the other two may be engaged with 2 / 3 and 1 / 3 of the tooth 3, respectively. This achieves the effect of multiple teeth, allowing the wrench 100 to be used in narrower operating spaces, further expanding its applicability. 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, with the multiple pawls arranged at intervals along the outer periphery of the tooth portion 3, without any specific limitation.

[0105] like Figures 19 to 27 As shown, 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 fourth pawl 52 are sequentially arranged along the first radius of curvature on the side of the first tooth block 40 near 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 third pawl 51 are sequentially arranged along the second radius of curvature on the side of the second tooth block 50 near the tooth portion 3; wherein, the first radius of curvature is greater than the radius of curvature of the tooth portion 3, and the second radius of curvature is greater than the radius of curvature 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 the first curvature on the side of the first tooth block 40 near 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 the second curvature on the side of the second tooth block 50 near the tooth portion 3; wherein, the first curvature is less than the curvature of the tooth portion 3, and the second curvature is less than the curvature of the tooth portion 3.

[0106] With this configuration, the synchronization of the first pawl assembly 4 and the second pawl assembly 5 is better, the number of structural components is effectively reduced, assembly is easier, and the cooperation between the two and the reversing assembly 6 is simpler, more stable, and easier to control the reversing. That is, the first radius of curvature of the first tooth block 40 is greater than the radius of curvature of the tooth 3, so that when a portion of the ratchet of the first tooth block 40 is engaged with the tooth 3, the other portion of the ratchet can be separated from or partially separated from the tooth 3; similarly, the second radius of curvature of the second tooth block 50 is greater than the radius of curvature of the tooth 3, so that when a portion of the ratchet of the second tooth block 50 is engaged with the tooth 3, the other portion of the ratchet can be separated from or partially separated from the tooth 3.

[0107] In other words, such as Figure 19 and Figures 21 to 25 As shown, when the ratchet of the first pawl 41 of the first toothed block 40 engages with the toothed portion 3, and the ratchet of the second pawl 42 of the second toothed block 50 is not fully engaged with the toothed portion 3, the ratchet of the fourth pawl 52 and the ratchet of the third pawl 51 will separate from or partially separate from the toothed portion 3, so that the wrench body 1 and the driving member 2 can rotate synchronously in a preset direction (i.e., Figure 22 The drive component 2 rotates along the -A direction with its axis as the center of rotation. This allows the drive component 2 to tighten or loosen components such as sleeves, nuts, and bolts along the -A direction. The control handle 13 rotates along the -A direction with its axis as the center of rotation. Figure 22 When rotating in the +A direction as shown, because the toothed part 3 is in ratchet engagement with the first toothed block 40 and the second toothed block 50, the toothed part 3 will slip with the first pawl 41 and the second pawl 42, allowing the wrench body 1 to move independently along... Figure 22The +A direction is shown, while the toothed part 3 and the drive member 2 are fixed relative to components such as sleeves, nuts, and bolts. In this way, by repeatedly rotating the control handle 13 and turning the operating part 14, force can be continuously applied to components such as sleeves, nuts, and bolts, gradually tightening these components to the required fastening standard.

[0108] See Figure 26 and Figure 27 Conversely, when the reversing member 61 is activated, if the ratchet of the fourth pawl 52 of the first tooth block 40 is not fully engaged with the tooth portion 3, and the ratchet of the third pawl 51 of the second tooth block 50 is engaged with the tooth portion 3, the ratchet of the first pawl 41 and the ratchet of the second pawl 42 will separate from or partially separate from the tooth portion 3, so that the wrench body 1 and the driving member 2 can rotate synchronously in opposite directions in a preset direction (i.e., Figure 27 As shown, the drive component 2 rotates along the +A direction with its axis as the center of rotation. At this time, the drive component 2 can tighten or loosen components such as sleeves, nuts, and bolts along the +A direction. The control handle 13 rotates along the +A direction with its axis as the center of rotation. Figure 27 When rotated in the -A direction as shown, the tooth 3 will slip between the third pawl 51 and the fourth pawl 52, allowing the wrench body 1 to move independently along... Figure 22 When rotated in the -A direction as shown, the toothed part 3 and the drive member 2 are fixed relative to components such as sleeves, nuts, and bolts. In this way, by repeatedly rotating the control handle 13 and turning the operating part 14, force can be continuously applied to components such as sleeves, nuts, and bolts, gradually tightening these components to the required fastening standard.

[0109] like Figures 20 to 25 As shown, a set of V-shaped first mounting grooves 101 and second mounting grooves 102 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. Each first mounting groove 101 and each second mounting groove 102 is provided with an elastic member 7. When the reversing member 61 is rotated in a preset direction or in the opposite direction of the preset direction, the groove spacing of the first mounting groove 101 in each set along the direction of the elastic member 7 is shortened, or the groove spacing of the second mounting groove 102 in each set along the direction of the elastic member 7 is shortened, so as to compress the elastic member 7, so that part of the ratchet 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 405 of the other tooth block 50 does not fully engage with the tooth portion 3.

[0110] In other words, a set of elastic elements 7 is provided between the first tooth block 40 and the reversing member 61, and between the second tooth block 50 and the reversing member 61. Each set of elastic elements 7 includes a first elastic element 71 and a second elastic element 72 arranged in a V-shape. Rotating the reversing member 61 in a preset direction or in the opposite direction can compress the two first elastic elements 71 or the two second elastic elements 72, so that part of the ratchet 405 of one of the first tooth block 40 and the second tooth block 50 engages with the tooth portion 3, while part of the ratchet 405 of the other tooth block does not fully engage with the tooth portion 3.

[0111] With this configuration, since the first and second radii of curvature are greater than the radius of curvature of the tooth 3, when the reversing member 61 reverses direction, it can compress the elastic member 7 in the first mounting groove 101 or the second mounting groove 102, causing one side of the first tooth block 40 and one side of the second tooth block 50 to rotate closer to the tooth 3 under the elastic action of the elastic member 7. As a result, one of the ratchet teeth 405 of the first tooth block 40 and the ratchet teeth 405 of the second tooth block 50 can engage with the tooth 3, while the other can not fully engage with the tooth 3. Meanwhile, 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 lift up, moving away from the tooth 3, and thus separating or partially separating from the tooth 3.

[0112] Specifically, the first elastic element 71 is disposed in the first mounting groove 101, and the second elastic element 72 is disposed in the second mounting groove 102.

[0113] In this embodiment, in order to maintain better synchronization of the drive on both sides, the first radius of curvature is equal to the second radius of curvature, that is, the first curvature is equal to the second curvature.

[0114] like Figures 23 to 25 As shown, the first mounting groove 101 includes a first groove portion 1011 and a second groove portion 1012 with opposite openings, and the second mounting groove 102 includes a third groove portion 1021 and a fourth groove portion 1022 with opposite openings. The first tooth block 40 and the second tooth block 50 have the first groove portion 1011 and the fourth groove portion 1022 on the side facing the reversing member 61, and the reversing member 61 has the second groove portion 1012 and the third groove portion 1021 on the side facing the first tooth block 40 and the second tooth block 50, respectively.

[0115] See Figure 22 and Figure 23When the wrench body 1 rotates in a preset direction, the two second grooves 1012 on the reversing member 61 move closer to the two first grooves 1011, which shortens the groove spacing of the first mounting groove 101. The two elastic members 7 located in the two first mounting grooves 101 are compressed, which in turn can apply elastic force to the side of the first tooth block 40 that is relatively far away from the second tooth block 50 and the side of the second tooth block 50 that is relatively close to the first tooth block 40, so that some of the ratchet teeth of the first tooth block 40 engage with the tooth 3, and some of the ratchet teeth of the second tooth block 50 do not fully engage with the tooth 3.

[0116] At the same time, the two third grooves 1021 move away from the two fourth grooves 1022 respectively, which lengthens the groove spacing of the second mounting groove 102. The compression of the two elastic members 7 located in the two second mounting grooves 102 is restored, and no longer the 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 opposite directions and separate or partially separate from the tooth 3.

[0117] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0118] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that: 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 according to claim 1, characterized in that 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 according to claim 1, characterized in that The driving member comprises a driving shaft or a driving ring.

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