A combination wrench
By designing a modular wrench, the problem of limited maintenance space for construction and mining machinery is solved. It enables flexible adjustment of the wrench length and shape in confined spaces, improving maintenance efficiency and applicability, and enhancing the applicability and versatility of threaded connections in different spaces and of different types.
Patent Information
- Application Number
- CN202521883585.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-02
AI Technical Summary
The limited space available for maintenance of construction and mining machinery at construction sites makes maintenance difficult, especially when the equipment's walking mechanism malfunctions, resulting in high maintenance costs and long repair cycles.
A modular wrench has been designed, comprising a handle and an adjustable-angle component arm. A dodecagonal through-hole and a flexible retaining ring ensure a secure connection. Equipped with a light, it facilitates flexible operation and connector replacement in confined spaces, improving applicability and versatility.
It enables flexible adjustment of wrench length and shape in confined spaces, improving maintenance efficiency, enhancing applicability and versatility in different spaces and types of threaded connections, and simplifying maintenance operations.
Smart Images
Figure CN224674767U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of wrenches, and in particular to a combination wrench. Background Technology
[0002] A wrench is a common hand tool primarily used to tighten or loosen nuts, bolts, and other fasteners with hexagonal or square heads. Its design is based on the lever principle, converting a small force applied to a long handle into a large torque applied to the nut or bolt, thus easily accomplishing the task of tightening or loosening. Its head typically has an adjustable or fixed-size opening to accommodate different sizes of nuts and bolts.
[0003] Construction machinery, mining machinery, and other mobile equipment are typically located in mountainous areas far from urban areas. If the equipment malfunctions, especially if the walking mechanism fails, it cannot move on its own and requires transport vehicles for repair, leading to increased maintenance costs and longer repair cycles. On-site repair becomes the preferred option. However, such equipment is generally compactly designed with very limited repair space. The lack of maintenance tunnels and lifting equipment further complicates the already difficult repair process.
[0004] Therefore, in order to solve the above problems, this utility model provides a combination wrench. Utility Model Content
[0005] The purpose of this invention is to provide a modular wrench to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a combination wrench, including a handle, one end of which is provided with a plurality of sequentially connected component arms, both ends of which are provided with through holes, an adapter is installed inside the through hole furthest from the handle, and the other through holes are provided with connecting pipes, a fixing tube is installed on the outer wall of one end of the adapter located outside the through holes, a support base is installed outside the fixing tube, a limit groove is provided at one top end of the support base, a limit block is provided inside the limit groove, a support frame is installed on the top of the limit block, and a light is installed on the top of the support frame.
[0007] Preferably, the through hole is configured as a dodecagon, and the inner wall size of the through hole is adapted to the outer side size of the connecting pipe and the adapter, and the outer side size of the adapter is adapted to the inner wall size of the fixing pipe.
[0008] Preferably, the outer side of the connecting pipe has a first slot, and the outer side of the adapter has two second slots. The first slot and the second slot are each provided with a shaft elastic retaining ring.
[0009] Preferably, the support base has a cavity at one end away from the limiting groove, a threaded rod is installed between the two inner walls of the cavity, one end of the threaded rod extends to the outside of the support base and a throttle is installed thereon, and a pressing block is installed on the outer ring surface of the threaded rod, the pressing block being in contact with the inside of the cavity.
[0010] Preferably, compression springs are symmetrically installed at both ends of the inner wall on the other side of the cavity. A limit rod is installed inside the compression spring. One end of the limit rod extends into the interior of the limit groove and connects to the interior of the limit block. A triangular block is installed on the end of the limit rod that is away from the limit groove and close to the extrusion block.
[0011] Preferably, the outer wall of the end of the grip away from the component arm is threaded, and a threaded cap is installed on the thread. The inside of the grip is provided with a storage cavity to store a number of adapters, and the end of the adapter away from the light is provided with different types of connectors.
[0012] In summary, this utility model has the following beneficial technical effects: This modular wrench features an elastic retaining ring that prevents the connector and adapter from slipping out of the through hole after they are inserted, ensuring a secure connection between the arms and between the adapter and the arms. Users can flexibly adjust the angle of the arms according to the actual workspace and the location of the threaded connection. Arms of different lengths and numbers can be configured in groups, allowing users to create wrenches of suitable length and shape on-site to meet different work needs, thus improving the wrench's applicability and flexibility. When the compression block moves, it compresses the triangular block, which in turn pushes the limit rod and compresses the spring. One end of the limit rod extends into the limit groove and connects to the limit block, thus fixing the limit block inside the groove. This facilitates the disassembly and replacement of lighting fixtures. The corresponding adapter can be taken from the handle storage cavity and installed in the through hole at one end of the arm, enabling the disassembly and assembly of different types of threaded connections, improving the wrench's versatility and practicality. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a utility model Figure 1 Schematic diagram of structural layering; Figure 3 This is a utility model Figure 1 Partial structural diagram; Figure 4 This is a utility model Figure 3 Schematic diagram of structural layering; Figure 5 This is a utility model Figure 4 Partial structural diagram; Figure 6 This is a utility model Figure 5 Partial structural diagram.
[0014] Explanation of reference numerals in the attached drawings: 1. Handle; 2. Component arm; 201. Through hole; 3. Connector; 301. First slot; 4. Shaft retaining ring; 5. Adapter; 501. Second slot; 6. Fixing tube; 7. Support base; 701. Limiting groove; 702. Cavity; 8. Limiting block; 9. Support frame; 10. Lighting lamp; 11. Threaded rod; 12. Turn handle; 13. Pressing block; 14. Compression spring; 15. Limiting rod; 16. Triangular block; 17. Threaded cap. Detailed Implementation
[0015] The following is in conjunction with the appendix Figure 1 - Figure 6 The present invention will be described in further detail below.
[0016] A combination wrench, see reference Figure 1 - Figure 6 The device includes a handle 1, with several sequentially connected component arms 2 at one end of the handle 1. Both ends of each component arm 2 have through holes 201. An adapter 5 is installed inside the through hole 201 furthest from the handle 1, and pipes 3 are installed inside the other through holes 201. A fixing pipe 6 is installed on the outer wall of one end of the adapter 5 outside the through hole 201. A support base 7 is installed outside the fixing pipe 6. A limit groove 701 is opened at one end of the top of the support base 7. A limit block 8 is installed inside the limit groove 701. A support frame 9 is installed on the top of the limit block 8. A light 10 is installed on the top of the support frame 9.
[0017] Reference Figure 1 - Figure 4The through hole 201 is dodecagonal, and the inner wall dimension of the through hole 201 is adapted to the outer side dimension of the connecting pipe 3 and the adapter 5. The outer side dimension of the adapter 5 is adapted to the inner wall dimension of the fixing pipe 6. The dodecagonal design of the through hole 201 allows the connecting pipe 3 and the adapter 5 to be tightly inserted into the through hole 201. The dodecagonal shape helps to better distribute force and reduce slippage when transmitting torque. At the same time, the adapter 5 is adapted to the size of the fixing pipe 6, and the fixing pipe 6 can tightly fit the adapter 5, further enhancing the stability of the adapter 5 during operation. The connecting pipe 3 has a first slot 301 on its outside, and the adapter 5 has two second slots 501 on its outside. The first slot 301 and the second slot 501 are both provided with shaft elastic retaining rings 4. The shaft elastic retaining ring 4 is installed in the first slot 301 and the second slot 501. When the connecting pipe 3 and the adapter 5 are inserted into the through hole 201, the shaft elastic retaining ring 4 can block the connecting pipe 3 and the adapter 5 from sliding out of the through hole 201, ensuring the connection between the component arms 2 and the connection between the adapter 5 and the component arm 2 is stable. Since the dodecagonal through hole 201 and the connecting pipe 3 are size-matched, the component arm 2 is assembled with the connecting pipe 3 through the through hole 201. The component arm 2 can be rotated 30° sequentially on the connecting pipe 3 through the dodecagonal through hole 201 to adjust its direction. This allows the user to flexibly adjust the angle of the component arm 2 according to the actual working space and the position of the threaded connection, which is convenient for operation. The component arms 2 are configured in groups of different lengths and quantities. Users can combine wrenches of appropriate length and shape on site according to different work needs, which improves the applicability and flexibility of the wrench.
[0018] Reference Figure 5 - Figure 6A cavity 702 is formed at the end of the support base 7 furthest from the limiting groove 701. A threaded rod 11 is installed between the two inner side walls of the cavity 702. One end of the threaded rod 11 extends to the outside of the support base 7 and is fitted with a handle 12. A pressing block 13 is installed on the outer ring surface of the threaded rod 11, and the pressing block 13 fits into the interior of the cavity 702. When it is necessary to install or replace the lighting lamp 10, the threaded rod 11 is rotated by turning the handle 12. Since the pressing block 13 cooperates with the threaded rod 11 and fits into the interior of the cavity 702, the rotation of the threaded rod 11 will cause the pressing block 13 to move within the cavity 702. Compression springs 14 are symmetrically installed at both ends of the inner wall of the other side of the cavity 702. A limit rod 15 is installed inside the compression spring 14. One end of the limit rod 15 extends into the interior of the limit groove 701 and connects to the interior of the limit block 8. A triangular block 16 is installed on the end of the limit rod 15 away from the limit groove 701 and close to the extrusion block 13. When the extrusion block 13 moves, it will squeeze the triangular block 16 to move. The triangular block 16 will push the limit rod 15 to move and squeeze the compression spring 14. One end of the limit rod 15 extends into the interior of the limit groove 701 and connects to the interior of the limit block 8, thereby fixing the limit block 8 inside the limit groove 701, which facilitates the disassembly and replacement of the lighting lamp 10.
[0019] Reference Figure 1 - Figure 2 The handle 1 has threads on its outer wall at the end furthest from the component arm 2, and a threaded cap 17 is installed on the threads. The handle 1 has a storage cavity inside to hold several adapters 5. Different types of connectors are provided on the end of each adapter 5 furthest from the light bulb 10. The storage cavity can be easily opened or closed by rotating the threaded cap 17. The adapters 5, containing several different types of connectors, can be removed from the storage cavity and installed in the through hole 201 at one end of the component arm 2 according to the type of threaded connection to be disassembled (such as hexagonal head screws, hexagonal head bolts, Phillips head screws, etc.) to achieve disassembly and assembly of different types of threaded connections, improving the wrench's versatility. The connecting pipe 3 can be used for connecting the component arm 2, and can also be used directly with standard open-end wrenches, box wrenches, and socket wrenches.
[0020] The implementation principle of this utility model embodiment of a combination wrench is as follows: When using this wrench, the through hole 201 is designed as a dodecagon, allowing the connecting pipe 3 and the adapter 5 to be tightly inserted into the through hole 201. The dodecagonal shape helps to better distribute force and reduce slippage when transmitting torque. At the same time, the adapter 5 is size-matched with the fixing pipe 6, and the fixing pipe 6 can tightly fit the adapter 5, further enhancing the stability of the adapter 5 during operation. When the connecting pipe 3 and the adapter 5 are inserted into the through hole 201, the elastic retaining ring 4 of the shaft can act as a blocking effect to prevent the connecting pipe 3 and the adapter 5 from slipping out of the through hole 201, ensuring a stable connection between the component arms 2 and between the adapter 5 and the component arms 2. Since the dodecagonal through hole 201 and the connecting pipe 3 are size-compatible, the component arm 2 is assembled with the connecting pipe 3 through the through hole 201. The component arm 2 can be rotated 30° sequentially on the connecting pipe 3 through the dodecagonal through hole 201 to adjust its direction. This allows the user to flexibly adjust the angle of the component arm 2 according to the actual working space and the position of the threaded connection, which is convenient for operation. The component arms 2 are configured in groups of different lengths and quantities. Users can combine wrenches of appropriate length and shape on site according to different work needs, which improves the applicability and flexibility of the wrench. When it is necessary to install or replace the lighting lamp 10, the threaded rod 11 is rotated by turning the handle 12. Since the pressing block 13 is engaged with the threaded rod 11 and fits against the inside of the cavity 702, the rotation of the threaded rod 11 will cause the pressing block 13 to move within the cavity 702. When the pressing block 13 moves, it will press the triangular block 16 to move. The triangular block 16 will then push the limiting rod 15 to move and compress the compression spring 14. One end of the limiting rod 15 extends into the inside of the limiting groove 701 and connects to the inside of the limiting block 8, thereby fixing the limiting block 8 inside the limiting groove 701, which facilitates the disassembly and replacement of the lighting lamp 10. The threads on the outer ring of the handle 1 mate with the threaded cap 17. Rotating the threaded cap 17 allows for easy opening or closing of the storage chamber, which contains several adapters 5 for different types of connectors. During use, depending on the type of threaded connection to be disassembled (e.g., hexagonal head screws, hexagonal head bolts, Phillips head screws, etc.), the corresponding adapter 5 is removed from the storage chamber and installed in the through hole 201 at one end of the component arm 2. This allows for the assembly and disassembly of different types of threaded connections, improving the wrench's versatility. The connecting pipe 3 can be used for connecting the component arm 2 and can also be used directly with standard open-end wrenches, box wrenches, and socket wrenches, further enhancing its practicality.
[0021] Finally, the following points should be noted: First, in the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly, and can be mechanical connection or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0022] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A combination wrench, comprising a handle (1), characterized in that: One end of the grip (1) is provided with several sequentially connected component arms (2). Both ends of each component arm (2) are provided with through holes (201). The through hole (201) furthest from the grip (1) is equipped with an adapter (5). The other through holes (201) are all equipped with pipes (3). The outer wall of one end of the adapter (5) located outside the through hole (201) is equipped with a fixing pipe (6). The outside of the fixing pipe (6) is equipped with a support base (7). One end of the top of the support base (7) is provided with a limiting groove (701). The inside of the limiting groove (701) is provided with a limiting block (8). The top of the limiting block (8) is equipped with a support frame (9). The top of the support frame (9) is equipped with a lighting lamp (10).
2. A combination wrench according to claim 1, characterized in that: The through hole (201) is set as a dodecagon, and the inner wall size of the through hole (201) is adapted to the outer side size of the pipe (3) and the adapter (5), and the outer side size of the adapter (5) is adapted to the inner wall size of the fixed pipe (6).
3. A combination wrench according to claim 1, characterized in that: The outside of the connector (3) is provided with a first slot (301), and the outside of the adapter (5) is provided with two second slots (501). The first slot (301) and the second slot (501) are both provided with shaft elastic retaining rings (4).
4. A combination wrench according to claim 1, characterized in that: A cavity (702) is provided at the end of the support base (7) away from the limiting groove (701). A threaded rod (11) is installed between the two inner side walls of the cavity (702). One end of the threaded rod (11) extends to the outside of the support base (7) and a throttle (12) is installed thereon. An extrusion block (13) is installed on the outer ring surface of the threaded rod (11). The extrusion block (13) fits into the inside of the cavity (702).
5. A combination wrench according to claim 4, characterized in that: Compression springs (14) are symmetrically installed at both ends of the inner wall of the cavity (702). A limit rod (15) is installed inside the compression spring (14). One end of the limit rod (15) extends into the interior of the limit groove (701) and connects to the interior of the limit block (8). A triangular block (16) is installed on the end of the limit rod (15) that is away from the limit groove (701) and close to the extrusion block (13).
6. A combination wrench according to claim 1, characterized in that: The handle (1) has a thread on the outer wall of the end away from the component arm (2), and a threaded cap (17) is installed on the thread. The handle (1) has a storage cavity inside to store several adapters (5), and different types of connectors are provided on the end of the adapter (5) away from the light (10).