Threaded fastener
By introducing guide parts, circumferential positioning parts, and blocking bodies into the threaded fasteners, and using only a custom wrench, the problem of existing threaded fasteners being easily disassembled by non-workers is solved, thus improving the safety and protection of the equipment.
Patent Information
- Application Number
- CN202421268779.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-06-05
AI Technical Summary
Existing threaded fasteners are easily disassembled by non-workers, posing a risk of equipment damage.
A threaded fastener has been designed, comprising a guide, a circumferential positioning part, and a stop, which is designed to work only with a custom wrench to prevent disassembly and assembly with a general-purpose wrench.
It allows for disassembly only with a custom-made wrench, preventing unauthorized disassembly and improving the safety and protection of the equipment.
Smart Images
Figure CN222315591U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fasteners, in particular to a threaded fastener. Background Art
[0002] Threaded fasteners are commonly used parts in daily production and life. They can be matched with threaded holes to fix multiple parts. Currently, most commonly used threaded fasteners are general-purpose bolts or screws, which can be easily disassembled using general tools. On some equipment that needs to be protected, the use of the above-mentioned threaded fasteners has the risk of equipment being disassembled by non-staff, thus causing losses. Utility Model Content
[0003] The utility model provides a threaded fastener, which can overcome certain defects of the prior art.
[0004] According to the utility model, a threaded fastener comprises a cylindrical fastener body, wherein a connecting thread is formed at the outer wall of the fastener body along its axial direction; a mating portion is formed at one end of the fastener body, and a mating groove for inserting a wrench is formed at the end face of the mating portion; an outer section of an inner wall of the mating groove forms a guide portion, and an inner section of the inner wall of the mating groove forms a circumferential positioning portion; a blocking body is formed at the mating groove in the area of the circumferential positioning portion, and the blocking body covers the circumferential positioning portion in the axial direction.
[0005] In the utility model, the fastener body can be used to achieve a fastened connection between two workpieces, wherein the connecting thread can be threadedly matched with the threaded hole on the workpiece, thereby achieving position locking of the two workpieces; the matching groove can be matched with a wrench, thereby achieving disassembly and assembly of the fastener body.
[0006] Furthermore, the guide portion can facilitate the insertion of the wrench into the matching groove and guide the insertion of the wrench, and the circumferential positioning portion can cooperate with the outer wall of the wrench, thereby better achieving the cooperation between the wrench and the matching groove.
[0007] It is understandable that the blocking body can cooperate with a wrench, wherein the wrench is a customized wrench that cooperates with the matching groove, and the blocking body can prevent other non-customized wrenches from being inserted into the matching groove, thereby preventing the fastener body from being loosened by the non-customized wrench.
[0008] Through the above structure, the fastener body can only be driven to rotate when it is matched with a customized wrench, and the fastener body cannot be disassembled by other universal wrenches, so it can be prevented from being disassembled after the two workpieces are fixed.
[0009] Preferably, the mating portion includes a limiting portion formed along the axis of the fastener body at one end of the connecting thread close to the mating groove, and the limiting portion is used to cooperate with the installation surface of the fastener.
[0010] Preferably, the mating portion further comprises a boss body formed on a side of the limiting portion away from the connecting thread, and the guiding portion comprises a first chamfer formed at an end of the boss body, and the first chamfer is used for mating with a wrench.
[0011] Preferably, the circumferential positioning portion is cut in a plane parallel to the bottom wall of the matching groove to form a cutting surface, and the shape of the cutting surface is a special-shaped surface.
[0012] Preferably, the irregular surface is a polygon, and bumps are formed at the corners of the polygon.
[0013] Preferably, the blocking body includes at least one limiting column formed at the bottom wall or the side wall of the matching groove.
[0014] Preferably, the limiting column is in the shape of a cylinder or a polygonal column.
[0015] Preferably, a second chamfer is formed at one end of the connecting thread away from the mating portion, and the second chamfer is used to cooperate with the mounting hole of the fastener. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is an axonometric schematic diagram of a threaded fastener in Example 1;
[0017] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;
[0018] Figure 3 It is a schematic front view of a threaded fastener in Example 1;
[0019] Figure 4 for Figure 3 Axonometric diagram of the middle BB;
[0020] Figure 5 This is a top view schematic diagram of a threaded fastener in Example 1. DETAILED DESCRIPTION
[0021] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.
[0022] Example 1
[0023] See Figure 1-2The present embodiment provides a threaded fastener, which includes a cylindrical fastener body 100, and a connecting thread 101 is formed on the outer wall of the fastener body 100 along its axial direction; a mating portion 110 is formed at one end of the fastener body 100, and a mating groove 111 for inserting a wrench is formed at the end surface of the mating portion 110; the outer section of the inner wall of the mating groove 111 forms a guide portion 2111, and the inner section of the inner wall of the mating groove 111 forms a circumferential positioning portion 2112; the mating groove 111 is located in the area of the circumferential positioning portion 2112 to form a blocking body 2113, and the blocking body 2113 covers the circumferential positioning portion 2112 in the axial direction.
[0024] According to the solution provided by the utility model, the fastener body 100 can be used to achieve a fastened connection between two workpieces, wherein the connecting thread 101 can be threadedly matched with the threaded hole on the workpiece, thereby achieving position locking of the two workpieces; the matching groove 111 can be matched with a wrench, thereby achieving disassembly and assembly of the fastener body 100.
[0025] Furthermore, the guide portion 2111 can facilitate the insertion of the wrench into the matching groove 111 and guide the insertion of the wrench, and the circumferential positioning portion 2112 can cooperate with the outer wall of the wrench, thereby better achieving the cooperation between the wrench and the matching groove 111.
[0026] It is understandable that the blocking body 2113 can cooperate with a wrench, wherein the wrench is a customized wrench that cooperates with the matching groove 111. The blocking body 2113 can prevent other non-customized wrenches from being inserted into the matching groove 111, thereby preventing the fastener body 100 from being loosened by the non-customized wrench.
[0027] Through the above structure, the fastener body 100 can be driven to rotate only when it is matched with a customized wrench, and the fastener body 100 cannot be disassembled by other universal wrenches, so it can be prevented from being disassembled after the two workpieces are fixed.
[0028] See Figure 1 The matching portion 110 includes a limiting portion 112 formed along the axis of the fastener body 100 at one end of the connecting thread 101 close to the matching groove 111, and the limiting portion 112 is used to match with the installation surface of the fastener.
[0029] Specifically, the limiting portion 112 can cooperate with the mounting surface, thereby increasing the contact area between the matching portion 110 and the mounting surface, reducing the pressure on the bottom surface of the matching portion 110 , and thus reducing the risk of brittle fracture at the matching portion 110 .
[0030] See Figure 1-5The mating portion 110 further includes a boss body 320 formed on a side of the limiting portion 112 away from the connecting thread 101, and the guiding portion 2111 includes a first chamfer 5111 formed at an end of the boss body 320, and the first chamfer 5111 is used to cooperate with a wrench.
[0031] Specifically, the first chamfer 5111 can guide the wrench when the wrench is inserted into the matching groove 111 , thereby better facilitating the wrench to be inserted into the matching groove 111 and to be matched with the circumferential positioning portion 2112 .
[0032] The circumferential positioning portion 2112 is cut by a plane parallel to the bottom wall of the matching groove 111 to form a cutting surface, and the shape of the cutting surface is a special-shaped surface.
[0033] Specifically, the special-shaped surface cannot be matched with a general tool, and thus cannot be disassembled using the general tool.
[0034] Furthermore, the special-shaped surface is a polygon, and bumps are formed at the corners of the polygon.
[0035] Specifically, the protrusions can further increase the difficulty of fitting the circumferential positioning portion 2112 , so that a customized wrench must be used to disassemble the fastener body 100 .
[0036] The blocking body 2113 includes at least one limiting column 4112 formed on the bottom wall or the side wall of the matching groove 111 .
[0037] Specifically, the limiting column 4112 can prevent a flat-blade screwdriver from being inserted into the matching groove 111 and prying the side wall of the matching groove 111 to rotate the fastener, thereby removing the fastener body 100 .
[0038] It is easy to understand that the shape of the limiting column 4112 is a cylinder or the shape of the limiting column 4112 is a polygonal column.
[0039] Specifically, the limiting column 4112 can block the non-customized wrench from being inserted into the matching groove 111 . By limiting the shape of the limiting column 4112 , the difficulty of inserting the non-customized wrench into the matching groove 111 can be further increased.
[0040] See Figure 4 A second chamfer 402 is formed at one end of the connecting thread 101 away from the mating portion 110 , and the second chamfer 402 is used to cooperate with the mounting hole of the fastener.
[0041] Specifically, the second chamfer 402 can facilitate the fastener body 100 to mate with the mounting hole.
[0042] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.
[0043] The above is a schematic description of the present invention and its implementation methods, which is not restrictive. The embodiments shown are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the present invention, they should all fall within the protection scope of the present invention.
Claims
1. A threaded fastener, characterized in that: The invention comprises a cylindrical fastener body (100), wherein a connecting thread (101) is formed on the outer wall of the fastener body (100) along the axial direction thereof; a matching portion (110) is formed at one end of the fastener body (100), and a matching groove (111) for inserting a wrench is formed at the end surface of the matching portion (110); an outer section of the inner wall of the matching groove (111) forms a guide portion (2111), and an inner section of the inner wall of the matching groove (111) forms a circumferential positioning portion (2112); and a blocking body (2113) is formed at the matching groove (111) in the area of the circumferential positioning portion (2112), and the blocking body (2113) covers the circumferential positioning portion (2112) in the axial direction.
2. A threaded fastener according to claim 1, characterized in that: The matching portion (110) comprises a limiting portion (112) formed along the axis of the fastener body (100) at one end of the connecting thread (101) close to the matching groove (111), and the limiting portion (112) is used to match with the installation surface of the fastener.
3. A threaded fastener according to claim 2, characterized in that: The mating portion (110) further comprises a boss body (320) formed on a side of the limiting portion (112) away from the connecting thread (101), and the guiding portion (2111) comprises a first chamfer (5111) formed at an end of the boss body (320), and the first chamfer (5111) is used to mate with a wrench.
4. A threaded fastener according to claim 1, characterized in that: The circumferential positioning portion (2112) is cut by a plane parallel to the bottom wall of the matching groove (111) to form a cut surface, and the shape of the cut surface is a special-shaped surface.
5. A threaded fastener according to claim 4, characterized in that: The special-shaped surface is a polygon, and convex blocks are formed at the corners of the polygon.
6. A threaded fastener according to claim 1, characterized in that: The blocking body (2113) comprises at least one limiting column (4112) formed on the bottom wall of the matching groove (111).
7. A threaded fastener according to claim 1, characterized in that: The blocking body (2113) comprises at least one limiting column (4112) formed on the side wall of the matching groove (111).
8. A threaded fastener according to claim 6 or 7, characterized in that: The limiting column (4112) is in the shape of a cylinder.
9. A threaded fastener according to claim 6 or 7, characterized in that: The limiting column (4112) is in the shape of a polygonal column.
10. A threaded fastener according to claim 1, characterized in that: A second chamfer (402) is formed at one end of the connecting thread (101) away from the matching portion (110), and the second chamfer (402) is used to match with the mounting hole of the fastener.