An improved hook wrench

Abstract

This utility model relates to the field of wrench technology, and in particular to an improved hook-head wrench, comprising a handle, a hook, a rivet, and a reducing pad. The hook is mounted on one end of the handle and has an inner hook surface. The reducing pad is riveted to the end of the hook near the handle by the rivet. The reducing pad can rotate relative to the hook around the axis of the rivet. The reducing pad has a reducing surface that can rotate into or out of the inner hook surface. This utility model allows the inner diameter of the hook to be changed simply by rotating the reducing pad, making it convenient, flexible, and reliable. It can be used to tighten handles with two fixed diameter ranges, is highly practical, has a simple structure, and low manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of wrench technology, and in particular to an improved hook wrench. Background Technology

[0002] Hook wrenches are widely used in daily life and industrial production. For example, during the machining of parts on CNC milling machines (machining centers), different specifications of machining tools need to be changed due to different machining processes. Hook wrenches are one of the important tools for changing tools; they are used to tighten or loosen tool holders to facilitate the fixing, installation, and removal of tools. Depending on the machining performance requirements of CNC machine tools, different tool holders need to be changed to adapt to the machining requirements. In the current technology, different tool holders require different models of hook wrenches, resulting in a large number of hook wrenches of different specifications, increasing manufacturing costs.

[0003] Among existing patents, Chinese patent application number 201620185025.8 discloses a spring-loaded hook wrench, including a wrench body with a hook-shaped mounting groove. An embedded arc hook is installed within the groove, and an embedded arc hook positioning device is mounted on the groove, the positioning device being in contact with the hook. The positioning device includes a slotted headless screw and a round-headed post, the slotted headless screw being connected to the post, and a spring being installed between the screw and post. While this patent can facilitate tool holder replacement for CNC milling machines (machining centers) by meeting the requirements for changing tool holders of different specifications, the complex structure of the embedded arc hook positioning device makes the entire hook wrench complex, with numerous parts and cumbersome operation. Therefore, its shortcomings are obvious, and a solution is urgently needed. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide an improved hook wrench.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An improved hook wrench includes a handle, a hook, a rivet, and a reducing pad. The hook is mounted on one end of the handle and has an inner hook surface. The reducing pad is riveted to the end of the hook near the handle by the rivet. The reducing pad can rotate relative to the hook around the axis of the rivet. The reducing pad has a reducing surface that can rotate into or out of the inner hook surface.

[0007] Furthermore, the reducing pad is U-shaped or U-shaped, and rivets rivet the two side plates of the reducing pad to the hook head. The hook head is located between the two side plates of the reducing pad, and the reducing surface is located on the outer side of the closing plate of the reducing pad.

[0008] Furthermore, the variable diameter surface is an arc-shaped surface.

[0009] Furthermore, the handle includes a mounting head and a shaft, with the mounting head mounted on one end of the shaft and the hook head mounted on the mounting head.

[0010] Furthermore, the hook head is provided with a connecting arm, the mounting head is provided with a mounting part, the connecting arm is mounted on the mounting part, and the rivet is provided on the connecting arm and located above the mounting part.

[0011] Furthermore, the end face of the mounting head away from the hook head is recessed with a threaded hole, and one end of the shaft is provided with a stud, which is threadedly connected to the threaded hole.

[0012] Furthermore, the lever handle includes an extension sleeve that is detachably fitted onto the end of the shaft away from the mounting head.

[0013] Furthermore, a limit ring is provided on the inner wall of the extended sleeve, which is used to abut the end face of the shaft away from the hook.

[0014] Furthermore, a pin is provided at the end of the shaft away from the hook, forming a limiting step between the pin and the shaft. The pin is inserted into the extension sleeve, and the limiting step abuts against the end face of the extension sleeve.

[0015] Furthermore, a through hole is radially opened at the end of the extended sleeve away from the shaft.

[0016] The beneficial effects of this invention are as follows: In practical applications, by driving the variable diameter pad to reciprocate around the axis of the rivet, the variable diameter surface of the pad can be rotated into or out of the inner hook surface, thereby changing the inner diameter of the hook head. This allows the invention to screw on knife handles with two fixed diameter ranges. For example, when the variable diameter surface of the pad is rotated into the inner hook surface, the invention can screw on a knife handle of one specification; when the variable diameter surface is rotated out of the inner hook surface, the invention can screw on a knife handle of another specification. Furthermore, since the variable diameter pad is riveted to the hook head, there is a certain frictional resistance between the pad and the hook head. The pad cannot rotate freely relative to the hook head, allowing it to remain at the desired angle position on the hook head under the action of frictional resistance. This ensures reliable use and good operational stability. This invention allows for the change of the inner diameter of the hook head simply by rotating the variable diameter pad. It is convenient, flexible, and reliable to use, and can be used to screw tool holders with two fixed diameter ranges. It is highly practical, has a simple structure, and low manufacturing cost. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is an exploded structural diagram of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Handle; 2. Hook; 3. Rivet; 4. Variable diameter pad; 5. Inner hook surface; 6. Variable diameter surface; 7. Mounting head; 8. Shaft; 9. Connecting arm; 10. Mounting part; 12. Stud; 13. Extension sleeve; 14. Insert post; 15. Through hole. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0022] like Figure 1 and Figure 2 As shown, the present invention provides an improved hook wrench, which includes a handle 1, a hook 2, a rivet 3, and a reducing pad 4. The hook 2 is installed at one end of the handle 1 and has an inner hook surface 5. The reducing pad 4 is riveted to the end of the hook 2 near the handle 1 via the rivet 3. The reducing pad 4 can rotate relative to the hook 2 around the axis of the rivet 3. The reducing pad 4 has a reducing surface 6 and can rotate into or out of the inner hook surface 5.

[0023] In practical applications, by driving the variable diameter pad 4 to reciprocate around the axis of the rivet 3, the variable diameter surface 6 of the variable diameter pad 4 is rotated into or out of the inner hook surface 5, thereby changing the inner diameter of the hook head 2. This allows the invention to screw on knife handles with two fixed diameter ranges. For example, when the variable diameter surface 6 of the variable diameter pad 4 is rotated into the inner hook surface 5, the invention can screw on a knife handle of one specification; when the variable diameter surface 6 of the variable diameter pad 4 is rotated out of the inner hook surface 5, the invention can screw on a knife handle of another specification. Furthermore, since the variable diameter pad 4 is riveted to the hook head 2 via the rivet 3, there is a certain frictional resistance between the variable diameter pad 4 and the hook head 2. The variable diameter pad 4 cannot rotate freely relative to the hook head 2, allowing it to remain at the desired angle position on the hook head 2 under the action of frictional resistance, resulting in reliable use and good working stability. This utility model can change the inner diameter of the hook head 2 simply by rotating the diameter-changing pad 4. It is convenient, flexible and reliable to use, and can meet the requirements of screwing on two fixed diameter ranges of tool holders. It is highly practical, has a simple structure and low manufacturing cost.

[0024] In this embodiment, the variable diameter pad 4 is U-shaped or U-shaped. Rivets 3 rivet the two side plates of the variable diameter pad 4 to the hook head 2. The hook head 2 is located between the two side plates of the variable diameter pad 4, and the variable diameter surface 6 is located on the outer side of the closed plate of the variable diameter pad 4. This structural design allows the variable diameter pad 4 to be firmly riveted to the hook head 2, and the structure of the variable diameter pad 4 and the hook head 2 is compact and aesthetically pleasing. The variable diameter pad 4 also exhibits good working stability when rotating relative to the hook head 2.

[0025] In this embodiment, the variable diameter surface 6 is an arc-shaped surface. This structural design facilitates stable screwing of the tool holder.

[0026] In this embodiment, the handle 1 includes a mounting head 7 and a shaft 8. The mounting head 7 is mounted on one end of the shaft 8, and the hook head 2 is mounted on the mounting head 7. This structural design enables modular assembly of the handle 1.

[0027] In this embodiment, the hook head 2 is provided with a connecting arm 9, the mounting head 7 is provided with a mounting part 10, the connecting arm 9 is mounted on the mounting part 10, and the rivet 3 is provided on the connecting arm 9 and located above the mounting part 10. This structural design facilitates the assembly of the hook head 2 and the handle 1.

[0028] In this embodiment, the end face of the mounting head 7 away from the hook head 2 is recessed with a threaded hole, and one end of the shaft 8 is provided with a stud 12, which is threadedly connected to the threaded hole. This structural design not only makes the connection between the mounting head 7 and the shaft 8 firm, but also facilitates the disassembly, assembly, and maintenance of the mounting head 7 and the shaft 8.

[0029] In this embodiment, the handle 1 includes an extension sleeve 13, which is detachably fitted onto the end of the shaft 8 away from the mounting head 7. The extension sleeve 13 can extend the length of the handle 1, that is, lengthen the lever arm of the present invention during use, making it easier for the user to operate.

[0030] In this embodiment, a limiting ring is provided on the inner wall of the extension sleeve 13. The limiting ring is used to abut against the end face of the shaft 8 away from the hook head 2. An insertion post 14 is provided at the end of the shaft 8 away from the hook head 2. A limiting step is formed between the insertion post 14 and the shaft 8. The insertion post 14 is inserted into the extension sleeve 13, and the limiting step abuts against the end face of the extension sleeve 13. This structural design allows the extension sleeve 13 to be accurately assembled onto the shaft 8 without over-assembly.

[0031] In this embodiment, a through hole 15 is radially provided at the end of the extension sleeve 13 away from the shaft 8. When screwing the tool handle in this utility model, an external insertion rod can be inserted into the through hole 15, and the user can then apply force to the insertion rod to facilitate screwing the tool handle; of course, the through hole 15 can also be used to hang the extension sleeve 13, which is convenient for storing and keeping the extension sleeve 13.

[0032] All technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An improved hook-head wrench, characterized in that: It includes a handle (1), a hook (2), a rivet (3) and a reducing pad (4). The hook (2) is installed at one end of the handle (1) and has an inner hook surface (5). The reducing pad (4) is riveted to the end of the hook (2) near the handle (1) via the rivet (3). The reducing pad (4) can rotate relative to the hook (2) around the axis of the rivet (3). The reducing pad (4) has a reducing surface (6) and can rotate into or out of the inner hook surface (5).

2. The improved hook wrench according to claim 1, characterized in that: The reducing pad (4) is U-shaped or U-shaped. The rivets (3) rivet the two side plates of the reducing pad (4) to the hook head (2). The hook head (2) is located between the two side plates of the reducing pad (4). The reducing surface (6) is located on the outer side of the closed plate of the reducing pad (4).

3. The improved hook wrench according to claim 1, characterized in that: The variable diameter surface (6) is an arc-shaped surface.

4. The improved hook wrench according to claim 1, characterized in that: The handle (1) includes a mounting head (7) and a shaft (8). The mounting head (7) is installed at one end of the shaft (8), and the hook (2) is installed on the mounting head (7).

5. The improved hook wrench according to claim 4, characterized in that: The hook (2) is provided with a connecting arm (9), the mounting head (7) is provided with a mounting part (10), the connecting arm (9) is mounted on the mounting part (10), and the rivet (3) is provided on the connecting arm (9) and located above the mounting part (10).

6. The improved hook wrench according to claim 4, characterized in that: The mounting head (7) has a threaded hole recessed on one end face away from the hook head (2), and a stud (12) is provided on one end of the shaft (8), which is threadedly connected to the threaded hole.

7. The improved hook wrench according to claim 4, characterized in that: The lever handle (1) includes an extension sleeve (13) which is detachably fitted onto the end of the shaft (8) away from the mounting head (7).

8. The improved hook wrench according to claim 7, characterized in that: The inner wall of the extension sleeve (13) is provided with a limiting ring, which is used to abut the end face of the shaft (8) away from the hook (2).

9. The improved hook wrench according to claim 7, characterized in that: A pin (14) is provided at the end of the shaft (8) away from the hook (2). A limiting step is formed between the pin (14) and the shaft (8). The pin (14) is inserted into the extension sleeve (13). The limiting step abuts against the end face of the extension sleeve (13).

10. An improved hook wrench according to claim 7, characterized in that: The extension sleeve (13) has a through hole (15) radially opened at the end away from the shaft (8).

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