A percussion wrench

Abstract

The application discloses a knocking wrench, which comprises a handle extending along a length direction and a wrench head installed at an end of the handle, the wrench head is provided with a jaw for clamping a nut, and the wrench head is provided with a plurality of spaced magnetic attraction devices on a side surface in a thickness direction of the wrench head and / or on an inner ring of the jaw; the magnetic attraction devices are used for generating a magnetic force to enable the knocking wrench to be adsorbed and fixed on a flange and / or the nut, so that the knocking wrench is prevented from falling off during being knocked. The magnetic attraction devices are arranged on the side surface of the wrench head and / or the inner ring of the jaw, so that the magnetic attraction wrench can be adsorbed on the flange or the nut by the magnetic attraction devices, without the need of being manually fixed by an additional staff, the risk of being struck is reduced, and the work efficiency is improved.

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 on the end of the handle. The wrench head is provided with jaws for engaging nuts. The wrench head has a plurality of spaced magnetic attraction devices on its side surface in the thickness direction and / or on the inner ring of the jaws. The magnetic attraction devices are used to generate magnetic force to attract and fix the striking wrench to the flange and / or nut, preventing the striking wrench from falling off during striking.

[0008] In some embodiments, the wrench head has a plurality of mounting holes extending along the thickness direction, the magnetic attraction device is embedded in the mounting holes, and its surface is flush with the surface of the wrench head in the thickness direction.

[0009] In some embodiments, the mounting hole extends through the thickness direction, the magnetic attraction device is embedded in the mounting hole, and both surfaces of the magnetic attraction device are flush with the two surfaces of the wrench head in the thickness direction.

[0010] In some embodiments, the inner ring of the jaws has a polygonal jaw structure, the polygonal jaw structure including a plurality of sequentially arranged engagement tooth assemblies, with clearance grooves formed between adjacent engagement tooth assemblies; the magnetic attraction device is disposed on the engagement tooth assembly.

[0011] In some embodiments, the engaging tooth assembly includes a first engaging tooth and a second engaging tooth, which have an included angle and a mounting groove extending radially along the jaws at the connection; the magnetic suction device is embedded in the groove and includes a first surface and a second surface, the first surface being flush with the first engaging tooth and the second surface being flush with the surface of the second engaging tooth.

[0012] In some embodiments, the engaging tooth assembly includes a first engaging tooth and a second engaging tooth, which have an included angle; a mounting groove is provided on the first engaging tooth or the second engaging tooth, and the magnetic suction device is embedded in the groove and is flush with the surface of the first engaging tooth or the second engaging tooth.

[0013] In some embodiments, the magnetic attraction device is a permanent magnet, which is interference-fitted with the wrench head.

[0014] In some embodiments, the handle is provided with a locking device; the locking device includes a fixing member and an elastic member; the fixing member can extend from the handle under the action of the elastic member and lock onto the side of the nut or bolt head to prevent the wrench from falling off during the striking process.

[0015] In some embodiments, the handle has a fixing groove extending along its length, one end of the elastic member is fixed to the bottom wall of the fixing groove, and the other end is fixedly connected to the fixing member.

[0016] 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 fixing 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 fixing groove.

[0017] With the striking wrench provided above, this embodiment of the application provides multiple spaced magnetic attraction devices on the side surface of the wrench head, and / or multiple spaced magnetic attraction devices on the inner ring of the jaws. This allows the magnetic wrench to be attached to the flange or nut by means of the magnetic attraction devices, eliminating the need for additional personnel to hold and fix it, reducing the risk of injury from impact, 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: Figure 1 A structural diagram of a striking wrench according to an embodiment of this application is shown; Figure 2 A structural diagram of a striking wrench according to an embodiment of this application is shown; Figure 3 A schematic diagram of a locking device installed on a striking wrench in an embodiment of this application is shown; Figure 4 It shows Figure 3 A cross-sectional view of the striking wrench parallel to its thickness direction.

[0019] In the picture: 100, striking the wrench; 101. Handle; 102. Wrench head; 103. Jaws; 104. Magnetic suction device; 105. Mounting hole; 106. Engaging tooth assembly; 107. Clearance groove; 108. Mounting slot; 109. Fixing slot; 110. Fixing element; 111. Elastic component; 112. Limiting element; 113. First limiting slot; 114. Second limiting slot; 1041, First surface; 1042, Second surface; 1061, First engaging tooth; 1062, Second engaging tooth. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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]."

[0024] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0025] In some embodiments, this application provides a striking wrench 100, which includes 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 provided with jaws 103 for engaging nuts. The wrench head 102 has a plurality of spaced magnetic attraction devices 104 on its side surface in the thickness direction and / or on the inner ring of the jaws 103. The magnetic attraction devices 104 are used to generate magnetic force to attract and fix the striking wrench to the flange and / or nut, preventing the striking wrench 100 from falling off during striking.

[0026] like Figure 1As shown, the striking wrench 100 in this design includes a handle 101 and a wrench head 102. The handle 101 extends along its length, serving as a lever arm for the user to apply force. The wrench head 102 is mounted on one end of the handle 101 along its length and directly contacts and engages with the nut. The wrench head 102 is provided with jaws 103 for engaging the nut. The shape and size of the jaws 103 match the hexagonal or other shapes of the nut, ensuring a firm grip during striking. In this design, multiple spaced magnetic suction devices 104 are provided only on the side surface of the wrench head 102. These magnetic suction devices 104 use magnetic force to attract the wrench to the metal flange, preventing it from falling off during striking, improving the stability and safety of the tool, and reducing reliance on manual labor. Especially in high-altitude operations or single-person operations, this effectively avoids accidents caused by falling objects. In addition, the magnetic suction devices 104 are evenly distributed to ensure uniform magnetic force and enhance the stability of the attraction.

[0027] like Figure 2 As shown, in another specific embodiment, multiple magnetic devices 104 are provided only on the inner ring of the jaws 103. These magnetic devices 104 use magnetic force to attach the wrench to the nut, preventing it from falling off during hammering.

[0028] In another specific embodiment, a plurality of spaced magnetic attraction devices 104 are provided on the side surface of the wrench head 102, and a plurality of spaced magnetic attraction devices 104 (not shown in the figure) are also provided on the inner ring of the jaws 103, thereby further improving the fixing performance of the striking wrench 100 and further improving safety.

[0029] It is worth noting that the appendix in this application... Figure 1 and attached Figure 2 To better demonstrate the structure of the magnetic closure, it is shown detached from the striking wrench. Additionally, the number of magnetic closures corresponds to the number of mounting holes; not all magnetic closures are shown in the diagram.

[0030] The striking wrench 100 provided in this application is attached to the flange or nut by means of a magnetic device 104, eliminating the need for additional personnel to hold and fix it, reducing the risk of injury from impact and improving work efficiency.

[0031] In one specific implementation, the wrench head 102 has a plurality of mounting holes 105 extending along the thickness direction, and the magnetic attraction device 104 is embedded in the mounting holes 105, with its surface flush with the surface of the wrench head 102 in the thickness direction.

[0032] In this design, the wrench head 102 of the striking wrench 100 has multiple mounting holes 105 extending along the thickness direction. The magnetic suction device 104 is precisely fitted into these mounting holes 105, and the surface of the magnetic suction device 104 is flush with the surface of the wrench head 102 in the thickness direction. This ensures that the overall appearance and performance of the wrench head 102 are not affected after the magnetic suction device 104 is installed, while the magnetic suction device 104 can effectively perform its adsorption and fixing function.

[0033] In one specific implementation, the mounting hole 105 extends through the thickness direction, the magnetic attraction device 104 is embedded in the mounting hole 105, and both surfaces of the magnetic attraction device 104 are flush with the two surfaces of the wrench head 102 in the thickness direction.

[0034] In this design, the mounting hole 105 of the wrench head 102 of the striking wrench 100 extends through the thickness direction of the wrench head 102, and the magnetic attraction device 104 is tightly embedded in the mounting hole 105 and flush with both surfaces of the wrench head 102. This design allows the wrench to be attracted to the flange from both sides, ensuring stable attraction regardless of which side faces the flange, improving the tool's flexibility and adaptability, and effectively preventing it from falling off.

[0035] like Figure 2 As shown, in one specific embodiment, the inner ring of the jaw 103 has a polygonal jaw structure, which includes a plurality of sequentially arranged engaging tooth assemblies 106, with clearance grooves 107 formed between adjacent engaging tooth assemblies 106; a magnetic suction device 104 is disposed on the engaging tooth assembly 106. The engaging tooth assembly 106 includes a first engaging tooth 1061 and a second engaging tooth 1062, which have an included angle and a mounting groove 108 extending radially along the jaw 103 at the connection point; the magnetic suction device 104 is embedded in the groove and includes a first surface 1041 and a second surface 1042, the first surface 1041 being flush with the first engaging tooth 1061, and the second surface 1042 being flush with the surface of the second engaging tooth 1062.

[0036] In this design, the inner ring of the jaw 103 is designed with a polygonal jaw structure, which consists of multiple sequentially arranged engagement tooth components 106, with clearance grooves 107 formed between adjacent engagement tooth components 106. This design allows the jaw to better adapt to the shape of the nut when engaging with it, providing a more stable engagement effect, while also facilitating the separation and adjustment of the jaw 103 from the nut when needed.

[0037] In this design, the magnetic attraction device 104 is disposed on the engaging tooth assembly 106. Specifically, the engaging tooth assembly 106 includes a first engaging tooth 1061 and a second engaging tooth 1062, with a certain included angle between the first engaging tooth 1061 and the second engaging tooth 1062. A mounting groove 108 extending radially along the jaws 103 is provided in the middle region of their connection, and the magnetic attraction device 104 is tightly fitted into this mounting groove 108.

[0038] To avoid interference between the jaws 103 and the nut during engagement, the magnetic suction device 104 is provided with a first surface 1041 and a second surface 1042. When the magnetic suction device 104 is embedded in the mounting groove 108, the first surface 1041 is flush with the surface of the first engaging tooth 1061, and the second surface 1042 is flush with the surface of the second engaging tooth 1062. This design allows the magnetic suction device 104 to form a smooth and continuous surface with the engaging tooth assembly 106 after being embedded in the mounting groove 108. This ensures that the magnetic suction device 104 can effectively contact the nut or flange and generate a magnetic attraction during operation, thereby enhancing the stability and reliability of the striking wrench 100 during use, preventing the wrench from falling off during striking, and improving the safety and efficiency of the operation.

[0039] In some specific implementations, the engaging tooth assembly includes a first engaging tooth and a second engaging tooth, which are at an angle to each other; a mounting groove is provided on the first engaging tooth or the second engaging tooth, and the magnetic attraction device is embedded in the groove and is flush with the surface of the first engaging tooth or the second engaging tooth.

[0040] In this design, the locking tooth assembly consists of a first locking tooth and a second locking tooth, forming a certain angle between them. This design helps to better conform to the shape of the nut, ensuring stable engagement. A mounting groove is specially provided on either the first or second locking tooth, into which the magnetic suction device is tightly fitted. After the magnetic suction device is assembled with the locking tooth assembly, the surface of the magnetic suction device remains flush with the surface of the first or second locking tooth. This design ensures flatness when the jaws contact the nut, preventing any protrusion of the magnetic suction device from affecting the engagement effect. Furthermore, the magnetic suction device can fully contact the nut or flange, thereby magnetically attracting and fixing the wrench during striking, effectively preventing the wrench from falling off and improving operational safety and efficiency.

[0041] In one specific implementation, the magnetic attraction device is a permanent magnet, which is interference-fitted with the wrench head.

[0042] In this solution, the magnetic attraction device uses a permanent magnet, and it is connected to the wrench head via an interference fit. The connection method provided by this application effectively prevents the magnetic attraction device from loosening or falling off during use, ensuring the stable operation of the magnetic attraction function, thereby enhancing the stability and safety of the striking wrench during operation.

[0043] In one specific implementation, 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 lock onto the side of the nut or bolt head under the action of the elastic member, preventing the wrench from falling off during the striking process.

[0044] like Figure 3 and Figure 4 As shown, the handle 101 of the striking wrench in this application is equipped with a locking device, which consists of a fixing member 110 and an elastic member 111. The fixing member 110 can extend out of the handle 101 under the action of the elastic member 111. During use, when the jaws 103 clamp the nut or bolt head, the fixing member 110 in the locking device will extend outward from the handle 101 under the elastic force of the elastic member 111, precisely locking onto the side of the nut or bolt head. In this way, the locking device applies a stable force to the nut or bolt head, thereby effectively preventing the striking wrench 100 from falling off during striking.

[0045] It is worth noting that the solution in this application is a further improvement upon the magnetic attraction device. It should be noted that, in order to more clearly illustrate the structure and working principle of the locking device, the mounting slot and magnetic attraction device have been omitted from the accompanying drawings. This approach helps to more intuitively understand the design details of the locking device and its application in a striking wrench.

[0046] In one specific implementation, the handle has a fixing groove extending along its length, one end of the elastic member is fixed to the bottom wall of the fixing groove, and the other end is fixedly connected to a fixing member.

[0047] The handle 101 of the striking wrench 100 of this application has a fixing groove 109 along its length, which provides a precise installation position and stable spatial support for the locking device. The elastic component 111 in the locking device, specifically a spring, has one end firmly fixed to the bottom wall of the fixing groove 109, and the other end connected to the fixing member 110. The fixing member 110 is designed as a cylindrical pin, a shape that allows the pin to move smoothly within the fixing groove 109 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.

[0048] In one specific implementation, 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 fixing 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 fixing groove.

[0049] To achieve precise control of the fixing member 110, the striking wrench 100 of this application is specially provided with a limiting member 112 connected to it. This limiting member 112 is fixedly connected to the fixing member 110 and extends radially along the fixing member 110, forming a structure that facilitates the operator's grip and operation. A corresponding limiting groove is provided on the handle 101, extending along the thickness direction of the handle 101 and communicating with the fixing groove 109. This limiting groove provides space for the limiting member 112 to move and position. The operator can adjust the fixing member 110 to extend or retract from the fixing groove 109 by gripping the limiting member 112 and moving it within the limiting groove, thereby controlling the locking and releasing of the striking wrench 100.

[0050] The limiting grooves include a first limiting groove 113 and a second limiting groove 114 that are perpendicular to and connected to each other. The first limiting groove 113 extends along the length of the striking wrench 100, while the second limiting groove 114 extends along the width of the striking wrench 100. This arrangement allows the limiting member 112 to be accurately positioned in the corresponding limiting groove under different working conditions. Specifically, when the fixing member 110 extends out of the fixing groove 109 under the action of the elastic member 111 and is in a working state to hold the side of the nut or bolt head, the limiting member 112 is guided into the first limiting groove 113. At this time, the position of the limiting member 112 in the first limiting groove 113 ensures the stable extension of the fixing member 110, thereby guaranteeing the self-locking function of the striking wrench 100. Conversely, when it is necessary to retract the fixing member 110 into the fixing groove 109 to put the striking wrench 100 in a non-working state, the operator can move the limiting member 112 from the first limiting groove 113 to the second limiting groove 114. The positioning of the limiting member 112 in the second limiting groove 114 prevents the fixing member 110 from accidentally extending, ensuring the safety and convenience of the striking wrench 100 in the non-working state.

[0051] The design of the limiting member 112 and the limiting groove in this application allows the operator to easily and accurately control the extension and retraction of the fixing member 110, thereby realizing the self-locking and release of the striking wrench 100, which greatly improves the safety and work efficiency of tool use.

[0052] Those skilled in the art will understand that this solution does not limit the specific shape of the permanent magnet and the mounting hole; they can be cylindrical structures as shown in the figure, or they can be square structures, as long as the shape of the permanent magnet and the shape of the mounting hole are compatible. Similarly, this application does not limit the specific shape of the fixing groove.

[0053] 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, characterized in that, The wrench head (102) has a plurality of spaced magnetic attraction devices (104) on its side surface in the thickness direction and / or on the inner ring of the jaws (103); the magnetic attraction devices (104) are used to generate magnetic force to attract and fix the striking wrench to the flange and / or nut, preventing the striking wrench (100) from falling off during striking.

2. The striking wrench according to claim 1, characterized in that, The wrench head (102) has a plurality of mounting holes (105) extending along the thickness direction. The magnetic suction device (104) is embedded in the mounting holes (105) and its surface is flush with the surface of the wrench head (102) in the thickness direction.

3. The striking wrench according to claim 2, characterized in that, The mounting hole (105) extends through the thickness direction, and the magnetic attraction device (104) is embedded in the mounting hole (105). In the thickness direction, both surfaces of the magnetic attraction device (104) are flush with the two surfaces of the wrench head (102).

4. The striking wrench according to any one of claims 1-3, characterized in that, The inner ring of the jaw (103) has a polygonal jaw structure, which includes a plurality of sequentially arranged engagement tooth assemblies (106), and an avoidance groove (107) is formed between adjacent engagement tooth assemblies (106). The magnetic suction device (104) is disposed on the engaging tooth assembly (106).

5. The striking wrench according to claim 4, characterized in that, The engaging tooth assembly (106) includes a first engaging tooth (1061) and a second engaging tooth (1062) with an included angle between them, and has a mounting groove (108) extending radially along the jaws (103) at the connection. The magnetic attraction device (104) is embedded in the groove and includes a first surface (1041) and a second surface (1042). The first surface (1041) is flush with the first engaging tooth (1061), and the second surface (1042) is flush with the surface of the second engaging tooth (1062).

6. The striking wrench according to claim 4, characterized in that, The engaging tooth assembly (106) includes a first engaging tooth (1061) and a second engaging tooth (1062), which have an included angle. An installation groove (108) is provided on the first engaging tooth (1061) or the second engaging tooth (1062), and the magnetic suction device (104) is embedded in the groove and is flush with the surface of the first engaging tooth (1061) or the second engaging tooth (1062).

7. The striking wrench according to claim 1, characterized in that, The magnetic attraction device (104) is a permanent magnet, which is interference-fitted with the wrench head (102).

8. The striking wrench according to claim 1, characterized in that, The handle (101) is provided with a locking device inside; the locking device includes a fixing member (110) and an elastic member (111); the fixing member (110) can extend out from the handle (101) under the action of the elastic member (111) and hold onto the side of the nut or bolt head to prevent the striking wrench (100) from falling off during the striking process.

9. The striking wrench according to claim 8, characterized in that, The handle (101) has a fixing groove (109) opened along its length direction. One end of the elastic member (111) is fixed to the bottom wall of the fixing groove (109), and the other end is fixedly connected to the fixing member (110).

10. The striking wrench according to claim 9, characterized in that, The striking wrench (100) also includes a limiting member (112) connected to the fixing member (110), and the limiting member (112) is provided to extend radially along the fixing member (110); The handle (101) is provided with a limiting groove that communicates with the fixing groove (109). The limiting member (112) can extend out of the limiting groove for the operator to hold and adjust the fixing member (110) to extend or retract from the fixing groove (109).

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