A percussion wrench

Abstract

The application discloses a knocking wrench, which comprises a handle and a wrench head, the wrench head is provided with a jaw for clamping a nut or a bolt head, and the handle is internally provided with a locking device; the locking device comprises a fixing member and an elastic component; the fixing member can be stretched out from the handle interior to be clamped on the side edge of the nut or the bolt head under the action of the elastic component, so as to prevent the knocking wrench from falling off during being knocked. The locking device is arranged in the handle, when the jaw is clamped on the nut or the bolt head, the fixing member in the locking device is stretched out from the handle and clamped on the side edge of the nut or the bolt head, so that an acting force is applied to the nut or the bolt head, and the knocking wrench is effectively prevented from falling off during being knocked. The design makes it unnecessary to be fixed by an extra staff when the knocking wrench is used, not only reduces the risk that a staff is injured by being knocked during operation, but also reduces the demand for manpower and improves work efficiency.

Description

Technical Field

[0001] This application generally relates to the field of hardware tools technology. More specifically, this application relates to a striking wrench. Background Technology

[0002] A wrench is a common tool for installation and disassembly, usually made of structural steel made of carbon or alloy materials. A wrench is a hand tool that uses the lever principle to tighten or loosen bolts, screws, nuts, or other threaded fasteners. Wrenches usually have jaws or sockets at one or both ends of the handle to grip the bolt or nut. When using a wrench, external force is applied to the handle in the direction of thread rotation to tighten or loosen the bolt or nut.

[0003] Bolts are commonly used as connectors in equipment, machinery, and petrochemical industries, and they are typically quite large. Because large bolts are difficult to remove and often corrode after prolonged use, striking wrenches are usually used to remove them. However, due to the weight of the striking wrench, operators find it difficult to remove the bolt by simply turning the handle; therefore, a blunt object such as a hammer is used to strike the handle to loosen the bolt.

[0004] Existing striking wrenches typically require two people to operate. After the jaws of the striking wrench are fitted onto the bolt, one person uses a rope to secure the handle and pulls the rope taut along the bolt's radial direction to prevent the wrench from slipping off, while the other person uses a hammer or other tool to strike the handle. This method is not only wasteful of manpower, but also prone to the wrench swinging out during striking, making existing striking wrenches inconvenient to use and unsafe.

[0005] Therefore, there is an urgent need to provide a striking wrench to improve work efficiency and safety. Utility Model Content

[0006] In order to at least solve the technical problems mentioned above, this application proposes a cost-effective and safe-to-operate striking wrench.

[0007] This application provides a striking wrench, which includes a handle extending along its length and a wrench head mounted at the end of the handle. The wrench head is provided with jaws for engaging a nut or bolt head. A locking device is provided inside the handle. The locking device includes a fixing member and an elastic member. The fixing member can extend from inside the handle and engage with the side of the nut or bolt head under the action of the elastic member, preventing the striking wrench from falling off during striking.

[0008] In some embodiments, the handle has a mounting groove extending along its length, one end of the elastic member is fixed to the bottom wall of the mounting groove, and the other end is fixedly connected to the fixing member.

[0009] In some embodiments, the striking wrench further includes a limiting member connected to the fixing member, and the limiting member extends radially along the fixing member; the handle is provided with a limiting groove communicating with the mounting groove, and the limiting member can extend out of the limiting groove for the operator to hold and adjust the fixing member to extend or retract from the mounting groove.

[0010] In some embodiments, the limiting groove includes a first limiting groove and a second limiting groove that are perpendicular to each other and connected, wherein the first limiting groove extends along the length direction of the striking wrench, and the second limiting groove extends along the width direction of the striking wrench; when the fixing member extends out of the mounting groove and is in the working state, the limiting member is located in the first limiting groove; when the fixing member retracts into the mounting groove and is in the non-working state, the limiting member is located in the second limiting groove.

[0011] In some embodiments, the inner ring of the jaws has a plurality of sequentially arranged engaging tooth assemblies, with a clearance groove formed between adjacent engaging tooth assemblies; the opening of the mounting groove is located at the clearance groove.

[0012] In some embodiments, a permanent magnet is provided on the end face of the fixing member away from the elastic member.

[0013] In some embodiments, the adjacent engaging tooth assemblies have a first included angle, and the end face of the retainer away from the elastic member includes a first surface and a second surface, with a second included angle between the first surface and the second surface, and the first included angle and the second included angle being equal.

[0014] In some embodiments, the wrench head has a plurality of locking devices spaced apart.

[0015] In some embodiments, the elastic force of the elastic element on the wrench head is less than the elastic force of the elastic element on the handle.

[0016] In some embodiments, the fixing element is a cylindrical pin, and the elastic element is a spring.

[0017] As described above, this embodiment of the application incorporates a locking device within the handle. When the jaws engage with the nut or bolt head, a retaining element in the locking device extends from the handle and engages with the side of the nut or bolt head, thereby applying force to the nut or bolt head and effectively preventing the wrench from dislodging during striking. This design eliminates the need for additional personnel to hold and secure the wrench during use, reducing the risk of injury from impacts, minimizing manpower requirements, and improving work efficiency. Attached Figure Description

[0018] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0019] Figure 1 This illustration shows a schematic diagram of the fixing member in the striking wrench extending out of the mounting slot in an embodiment of this application;

[0020] Figure 2 This illustration shows a schematic diagram of the retaining member in the striking wrench retracting into the mounting slot in an embodiment of this application.

[0021] Figure 3 A cross-sectional view of the striking wrench in an embodiment of this application, parallel to its thickness direction, is shown.

[0022] 100. Tap the wrench;

[0023] 101. Handle; 102. Wrench head; 103. Jaws; 104. Fixing component; 105. Elastic component; 106. Engaging tooth assembly; 107. Clearance groove; 108. Mounting groove; 109. Limiting component; 110. First limiting groove; 111. Second limiting groove;

[0024] 1041, First surface; 1042, Second surface. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0028] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0029] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0030] In some embodiments, this application provides a striking wrench 100, which includes a handle 101 extending along the length direction and a wrench head 102 installed at the end of the handle 101. The wrench head 102 is provided with jaws 103 for engaging a nut or bolt head. A locking device is provided inside the handle 101. The locking device includes a fixing member 104 and an elastic member 105. The fixing member 104 can extend from inside the handle 101 under the action of the elastic member 105 and hold onto the side of the nut or bolt head, preventing the striking wrench 100 from falling off during striking.

[0031] like Figure 1 and Figure 2 As shown, the striking wrench 100 of this application mainly comprises two parts: a handle 101 extending along its length, and a wrench head 102 mounted on the end of the handle 101. The wrench head 102 is designed with jaws 103 for engaging nuts or bolt heads. A locking device is provided inside the handle 101, consisting of a fixing member 104 and an elastic member 105. The fixing member 104 can extend out of the handle 101 under the action of the elastic member 105. During use, when the jaws 103 engage the nut or bolt head, the fixing member 104 in the locking device will extend outward from the handle 101 under the elastic force of the elastic member 105, precisely engaging the side of the nut or bolt head. In this way, the locking device applies a stable force to the nut or bolt head, effectively preventing the striking wrench 100 from falling off during striking.

[0032] The solution provided in this application eliminates the need for additional personnel to hold and secure the striking wrench 100 during operation, which not only reduces the risk of personnel being injured by falling objects during operation, but also reduces manpower requirements and significantly improves work efficiency. It is especially suitable for complex environments such as high-altitude operations, and effectively avoids accidents caused by falling objects from heights that may result from the wrench falling off.

[0033] It is worth noting that, in order to optimize the tightening effect of nuts or bolt heads, the elastic force of the elastic component 105 was carefully designed and set at an appropriate kilogram, thereby achieving the best balance of the tightening performance of the striking wrench 100. This design not only ensures that the wrench and nut or bolt head are tightly fitted and stably locked during striking, effectively preventing accidental dislodgement due to external impact, but also fully considers the user experience, allowing the wrench to be easily aligned and securely locked during installation and removal, significantly improving work efficiency and operational safety.

[0034] In one specific embodiment, the handle 101 has a mounting groove 108 extending along its length. One end of the elastic member 105 is fixed to the bottom wall of the mounting groove 108, and the other end is fixedly connected to the fixing member 104. The fixing member 104 is a cylindrical pin, and the elastic member 105 is a spring.

[0035] The striking wrench 100 of this application has a mounting groove 108 along its length on the handle 101, which provides a precise mounting position and stable spatial support for the locking device. The elastic component 105 in the locking device, specifically a spring, is firmly fixed at one end to the bottom wall of the mounting groove 108, and the other end is connected to the fixing member 104. The fixing member 104 is designed as a cylindrical pin, a shape that allows the pin to move smoothly within the mounting groove 108 while ensuring its stability and reliability under force. When the jaws 103 engage with the nut or bolt head, the spring force causes the pin to extend from inside the handle 101 and accurately engage with the side of the nut or bolt head, thereby applying force and preventing the striking wrench 100 from falling off during striking. This ingenious internal structure design not only achieves the self-locking function of the striking wrench 100 but also greatly improves its safety and convenience in actual operation.

[0036] In one specific embodiment, the striking wrench 100 further includes a limiting member 109 connected to the fixing member 104, and the limiting member 109 extends radially along the fixing member 104; the handle 101 is provided with a limiting groove communicating with the mounting groove 108, and the limiting member 109 can extend from the limiting groove for the operator to hold and adjust the fixing member 104 to extend or retract from the mounting groove 108. The limiting groove includes a first limiting groove 110 and a second limiting groove 111 that are perpendicular to each other and connected, and the first limiting groove 110 extends along the length direction of the striking wrench 100, and the second limiting groove 111 extends along the width direction of the striking wrench 100; when the fixing member 104 extends out of the mounting groove 108 and is in the working state, the limiting member 109 is located in the first limiting groove 110; when the fixing member 104 retracts into the mounting groove 108 and is in the non-working state, the limiting member 109 is located in the second limiting groove 111.

[0037] To achieve precise control of the fixing member 104, the striking wrench 100 of this application is specially provided with a limiting member 109 connected to it. This limiting member 109 is fixedly connected to the fixing member 104 and extends radially along the fixing member 104, forming a structure that facilitates gripping and operation by the operator. A corresponding limiting groove is provided on the handle 101, extending along the thickness direction of the handle 101 and communicating with the mounting groove 108. This limiting groove provides space for the limiting member 109 to move and position. The operator can adjust the extension or retraction of the fixing member 104 from the mounting groove 108 by gripping the limiting member 109 and moving it within the limiting groove, thereby controlling the locking and releasing of the striking wrench 100.

[0038] The limiting grooves include a first limiting groove 110 and a second limiting groove 111 that are perpendicular to and connected to each other. The first limiting groove 110 extends along the length of the striking wrench 100, while the second limiting groove 111 extends along the width of the striking wrench 100. This arrangement allows the limiting member 109 to be accurately positioned in the corresponding limiting groove under different working conditions. Specifically, when the fixing member 104 extends out of the mounting groove 108 under the action of the elastic member 105 and is in a working state to hold the side of the nut or bolt head, the limiting member 109 is guided into the first limiting groove 110. At this time, the position of the limiting member 109 in the first limiting groove 110 ensures the stable extension of the fixing member 104, thereby guaranteeing the self-locking function of the striking wrench 100. Conversely, when it is necessary to retract the retaining member 104 into the mounting groove 108 to put the striking wrench 100 in a non-working state, the operator can move the limiting member 109 from the first limiting groove 110 to the second limiting groove 111. The positioning of the limiting member 109 in the second limiting groove 111 prevents the retaining member 104 from accidentally extending, ensuring the safety and convenience of the striking wrench 100 in the non-working state.

[0039] The design of the limiting member 109 and the limiting groove in this application allows the operator to easily and accurately control the extension and retraction of the fixing member 104, thereby realizing the self-locking and release of the striking wrench 100, which greatly improves the safety and work efficiency of tool use.

[0040] In one specific implementation, the inner ring of the jaw 103 has a plurality of sequentially arranged engaging tooth assemblies 106, with a clearance groove 107 formed between adjacent engaging tooth assemblies 106; the opening of the mounting groove 108 is located at the clearance groove 107.

[0041] The striking wrench 100 of this application has engaging tooth components 106 arranged sequentially on the inner ring of the jaws 103, with clearance grooves 107 formed between adjacent engaging tooth components 106. The opening of the mounting groove 108 is located at the clearance groove 107, which coincides with the longitudinal axis of the handle 101. This design enhances the meshing effect between the jaws 103 and the nut or bolt head, and provides space for the extension and retraction of the locking device, ensuring the stability and ease of operation of the striking wrench 100 during use.

[0042] In one specific implementation, a permanent magnet is provided on the end face of the fastener 104 away from the elastic member 105.

[0043] The striking wrench 100 of this application has a permanent magnet on the end face of the fixing member 104 away from the elastic member 105. During use, the fixing member 104 extends from inside the handle 101 under the elastic force of the spring, and the permanent magnet on the end face can be magnetically attracted to the nut or bolt head. This magnetic attraction further enhances the connection stability between the striking wrench 100 and the nut or bolt head, ensuring that the wrench will not accidentally fall off due to external force during striking.

[0044] like Figure 3 As shown, in a specific embodiment, adjacent engaging tooth assemblies 106 have a first included angle, and the end face of the retainer 104 away from the elastic member 105 includes a first surface 1041 and a second surface 1042, with a second included angle between the first surface 1041 and the second surface 1042, and the first included angle and the second included angle are equal.

[0045] In this application, the engaging tooth assemblies 106 of the inner ring of the jaw 103 of the striking wrench 100 are arranged sequentially, with each adjacent engaging tooth assembly 106 forming a specific first included angle. This included angle is designed to ensure that the jaw 103 fits tightly against the nut or bolt head. The end face of the fixing member 104 away from the elastic member 105 is designed with a first surface 1041 and a second surface 1042, which form a second included angle, and the first included angle and the second included angle are equal. This design ensures that when the striking wrench 100 is in operation, the contact surfaces of the fixing member 104 and the nut or bolt head can be precisely matched, guaranteeing uniform force between the fixing member 104 and the nut or bolt head, and enhancing the stability and reliability of the locking.

[0046] In one specific implementation, the wrench head 102 has a plurality of locking devices spaced apart.

[0047] The striking wrench 100 of this application has multiple spaced mounting grooves 108 on the inner ring of the jaws 103 of the wrench head 102, extending radially outward from the jaws 103. Each mounting groove 108 contains a locking device. Each locking device consists of a fixing member 104 and an elastic member 105. The fixing member 104 is a cylindrical pin, and the elastic member 105 is a spring. One end of the spring is fixed to the bottom wall of the mounting groove 108, and the other end is fixedly connected to the fixing member 104. Under the action of the spring force, the fixing member 104 can extend out from the mounting groove 108 and lock onto the side of the nut or bolt head to prevent it from falling off during striking.

[0048] The solution proposed in this application uses multiple locking devices to simultaneously act on different positions of the nut or bolt head, effectively preventing the wrench from shifting or rotating, ensuring stability and accuracy. The multi-point locking design also reduces the risk of the wrench falling off due to the failure of a single locking point, lowering the possibility of personnel being injured by falling objects during operation and further improving operational safety.

[0049] In one specific implementation, the elastic force of the elastic element 105 on the wrench head 102 is less than the elastic force of the elastic element 105 on the handle 101.

[0050] The striking wrench 100 of this application is designed with the limited installation space of the wrench head 102 in mind. Therefore, only the fixing member 104 and the elastic member 105 are provided on the wrench head 102, without the limiting member 109 and the limiting groove. To improve ease of use, the elastic member 105 on the wrench head 102 is designed to have a lower elastic force than the elastic member 105 on the handle 101, thus achieving a graded locking mechanism. In actual operation, the operator can first use the limiting member 109 to retract the elastic member 105 with a larger elastic force in the handle 101 into the mounting groove 108, and then use the nut to compress the elastic member 105 on the wrench head 102, causing it to retract into the mounting groove 108. After the jaws 103 are fully fitted onto the nut, the operator then controls the limiting member 109 to extend the elastic member 105 with a larger elastic force in the handle 101 from the mounting groove 108, so that it engages with the nut, completing the locking. This design allows the locking device on the wrench head 102 to reduce the force required for positioning and initial engagement when initially engaging the nut or bolt head, making the tool easier to align and initially secure. Meanwhile, the locking device on the handle 101, with its greater elasticity, provides stronger locking force during striking, ensuring the nut or bolt head is firmly secured and preventing the tool from falling off. This tiered locking mechanism not only improves the tool's adaptability and convenience at different stages of operation but also enhances its stability and safety in actual use.

[0051] This solution reduces the number of workers required by employing a self-locking function, lowering the risk of injury from falling objects due to improper coordination. The locking devices on the wrench head 102 and handle 101 work together to securely fix the nut or bolt head during striking, effectively preventing the tool from falling off and injuring workers and those around them, especially when working at heights, preventing accidents caused by falling objects.

[0052] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A striking wrench comprising a handle (101) extending along its length and a wrench head (102) mounted on the end of the handle (101), the wrench head (102) having jaws (103) for engaging a nut or bolt head, characterized in that, The handle (101) is provided with a locking device inside; the locking device includes a fixing member (104) and an elastic member (105); the fixing member (104) can extend out from the handle (101) under the action of the elastic member (105) and lock onto the side of the nut or bolt head to prevent the striking wrench (100) from falling off during the striking process.

2. The striking wrench according to claim 1, characterized in that, The handle (101) has a mounting groove (108) extending along its length. One end of the elastic member (105) is fixed to the bottom wall of the mounting groove (108), and the other end is fixedly connected to the fixing member (104).

3. The striking wrench according to claim 2, characterized in that, The striking wrench (100) also includes a limiting member (109) connected to the fixing member (104), and the limiting member (109) is provided to extend radially along the fixing member (104); The handle (101) is provided with a limiting groove that communicates with the mounting groove (108). The limiting member (109) can extend out of the limiting groove for the operator to hold and adjust the fixing member (104) to extend or retract from the mounting groove (108).

4. The striking wrench according to claim 3, characterized in that, The limiting groove includes a first limiting groove (110) and a second limiting groove (111) that are perpendicular to each other and connected, wherein the first limiting groove (110) extends along the length direction of the striking wrench (100), and the second limiting groove (111) extends along the width direction of the striking wrench (100). When the fixing member (104) extends out of the mounting groove (108) and is in the working state, the limiting member (109) is located in the first limiting groove (110); When the fastener (104) retracts into the mounting groove (108) and is in a non-working state, the limiting member (109) is located in the second limiting groove (111).

5. The striking wrench according to any one of claims 2-4, characterized in that, The inner ring of the jaw (103) has a plurality of sequentially arranged engaging tooth assemblies (106), and an avoidance groove (107) is formed between adjacent engaging tooth assemblies (106). The opening of the mounting groove (108) is located at the clearance groove (107).

6. The striking wrench according to claim 5, characterized in that, A permanent magnet is provided on the end face of the fixing member (104) away from the elastic member (105).

7. The striking wrench according to claim 6, characterized in that, The adjacent engaging tooth assemblies (106) have a first included angle between them. The end face of the fastener (104) away from the elastic member (105) includes a first surface (1041) and a second surface (1042), and the first surface (1041) and the second surface (1042) have a second included angle, which is equal to the first included angle and the second included angle.

8. The striking wrench according to any one of claims 1-4, characterized in that, The wrench head (102) has a plurality of locking devices spaced apart.

9. The striking wrench according to claim 8, characterized in that, The elastic force of the elastic component (105) on the wrench head (102) is less than the elastic force of the elastic component (105) on the handle (101).

10. The striking wrench according to claim 1, characterized in that, The fastener (104) is a cylindrical pin, and the elastic component (105) is a spring.

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