An integrated bolt sleeve assembly and a machining process thereof

Abstract

This application relates to the field of bolts, specifically disclosing an integrated bolt sleeve assembly and its processing technology. The assembly includes a bolt body and a sleeve body. The bolt body has a threaded section and a retaining ring. The sleeve body has an insertion hole for mating with the bolt body, and a retaining protrusion is provided within the insertion hole. The retaining protrusion cooperates with the retaining ring to limit the position of the sleeve body. A retaining ring is provided on the sleeve body, and its surface has multiple crisscrossing retaining grooves, the direction of which is angled to the axial direction of the sleeve body. This application reduces the likelihood of the bolt sleeve assembly falling off or loosening, improving the stability and firmness of the bolt sleeve assembly.

Description

Technical Field

[0001] This application relates to the field of bolts, and in particular to an integral bolt sleeve assembly and its manufacturing process. Background Technology

[0002] Bolts, as fasteners, are used in various fields of life. During use, there are certain requirements for the tightness and reliability of bolts. In the existing technology, the combination of bolts and sleeves can not only improve the reliability and tightness of bolts, but also protect bolts from damage or loosening, thereby improving the stability of bolt use.

[0003] In related technologies, a bolt sleeve assembly includes a bolt body and a sleeve body. The bolt body has a threaded section on its outer wall to facilitate the fixing and installation of the bolt. The sleeve body has an insertion hole that engages with the bolt body. Multiple ribs are provided on the outer wall of the sleeve body. The sleeve body is inserted into a plastic shell. The ribs limit the movement of the sleeve body, thereby protecting the bolt and preventing loosening.

[0004] Regarding the aforementioned technologies, traditional sleeves are pressed directly into the plastic housing using an interference fit. However, since the plastic housing softens when heated, the interference-fit sleeve may loosen under alternating hot and cold conditions. When vibration occurs, the bolt and sleeve may detach from the plastic housing, affecting the firmness and stability of the bolt fixation. Therefore, improvements are urgently needed. Summary of the Invention

[0005] In order to reduce the occurrence of bolt sleeve assembly detachment or loosening and improve the stability and firmness of bolt sleeve assembly, this application provides an integrated bolt sleeve assembly and its processing technology.

[0006] The technical solution for the integrated bolt sleeve assembly and its processing technology provided in this application is as follows: An integrated bolt and sleeve assembly and its processing technology are disclosed, comprising a bolt body and a sleeve body. The bolt body has a threaded section and a retaining ring. The sleeve body has an insertion hole for insertion into the bolt body, and a retaining protrusion is provided in the insertion hole. The retaining protrusion cooperates with the retaining ring to limit the position of the sleeve body. The sleeve body has a retaining ring with multiple retaining grooves crisscrossed on its surface. The direction of the retaining grooves is at an angle to the axial direction of the sleeve body.

[0007] By adopting the above technical solution, during use, the limiting ring and the limiting protrusion can prevent the sleeve from detaching from the bolt body, realizing an integrated bolt sleeve assembly. The bolt sleeve assembly is inserted into the plastic housing, with the limiting ring and the plastic housing having an interference fit, thus restricting the sleeve. When the plastic housing is subjected to high temperature, the plastic softens. Due to the interference fit of the sleeve body, the softened plastic material is incorporated into the limiting groove. Combined with the design that forms an angle with the sleeve body axis, the plastic and the limiting groove limit the movement of the sleeve body, improving the stability of the sleeve body. Furthermore, this design allows for more uniform stress distribution on the outer wall of the limiting ring. When the plastic vibrates, the vibration force is more evenly distributed, reducing gaps between the sleeve body and the plastic body and ensuring the stability of the sleeve body.

[0008] Optionally, the limiting block has a chamfer on the side away from the bolt body, and a limiting groove is provided on the side of the limiting block close to the bolt body.

[0009] By adopting the above technical solution, the chamfer can make it easier to insert the limiting block into the plastic shell, reduce the resistance of the installation sleeve, improve the convenience of installing the sleeve body, and, in conjunction with the use of the limiting slot, the movement of the sleeve can be further limited after the plastic material softens due to heat, thereby improving the stability of the sleeve fixation.

[0010] Optionally, an installation ring groove is provided on the outer wall of the bolt body, and the limiting retaining ring is a retaining spring, which is engaged in the installation ring groove.

[0011] By adopting the above technical solution, and using a detachable snap ring to cooperate with the mounting ring groove, the ease of assembling the bolt body and the sleeve body can be improved.

[0012] Optionally, the sleeve body is provided with a clamping flange on the side near the bolt body, and the clamping flange abuts against the bolt body.

[0013] By adopting the above technical solution, the contact area between the sleeve body and the bolt body can be increased, and the insertion depth of the sleeve body into the plastic housing can be limited by the clamping flange, thereby improving the convenience of using the sleeve body.

[0014] Optionally, the side of the clamping flange closest to the bolt body is provided with a plurality of friction protrusions, the width of the friction protrusions gradually decreasing in the direction away from the sleeve body, and the bolt body is provided with friction grooves that engage with the friction protrusions.

[0015] By adopting the above technical solution, the friction groove and friction protrusion cooperate to make the bolt body and the sleeve body more firmly connected after tightening, thereby improving the stability of using the integrated bolt sleeve assembly.

[0016] Optionally, a sliding ring is provided on the side of the sleeve body away from the bolt body, and a plug-in ring is provided on the side of the sliding ring closer to the sleeve body. The inner wall of the plug-in hole has a plug-in groove that engages with the plug-in ring. A limiting cavity is provided on the side of the sliding ring closer to the sleeve body, and a locking block is rotatably connected in the limiting cavity. An elastic element for driving the locking block to rotate outward is provided in the limiting cavity. Multiple locking slots are provided on the side of the sleeve body closer to the sliding ring that engage with the locking block. When the sliding ring slides away from the sleeve body, the elastic element drives the locking block to abut against the plastic housing. A driving ring is provided on the inner wall of the sliding ring, and a threaded groove is provided on the inner wall of the driving ring that engages with the threaded section.

[0017] By adopting the above technical solution, when the sleeve is inserted into the plastic housing, it is engaged with the drive ring threadedly through bolts, thereby pushing the drive ring away from the sleeve body. Under the action of the elastic element, the locking block abuts against the plastic housing, thereby achieving the purpose of locking the sliding ring and thus achieving the purpose of limiting the sleeve, so that the sleeve can be installed more stably on the plastic housing.

[0018] Optionally, the outer wall of the insertion ring is provided with a limiting slip ring, and the inner wall of the insertion groove is provided with a limiting slip groove for limiting the limiting slip ring.

[0019] By adopting the above technical solution, using a limiting slip ring and a limiting groove in combination, the occurrence of separation between the slip ring and the sleeve body can be reduced, and the sleeve can be pulled, further improving the firmness of the sleeve body.

[0020] Optionally, a connecting spring is provided in the limiting slide groove, and the connecting spring is used to pull the limiting slide ring to move closer to the sleeve body.

[0021] By adopting the above technical solution, when the sliding ring is pulled open, the connecting spring can generate tension between the sliding ring and the sleeve, thereby maintaining a strong pressure between the locking block and the plastic housing and improving the stability of the locking block locking the sliding ring.

[0022] Optionally, the locking block has an abutting slope on the side away from the sliding ring that abuts against the plastic housing, and the abutting slope is provided with a plurality of limiting protrusions.

[0023] By adopting the above technical solution, the locking block can be more stably abutted against the plastic shell, improving the convenience of using the locking block to lock and fix the sleeve body.

[0024] A processing method for an integrated bolt sleeve assembly includes the following steps: S1, Material preparation: Select the rough-machined bolt body and sleeve body; S2, Bolt processing, cold heading, grooving and thread rolling are performed on the rough-machined bolt body to form a bolt body with threaded sections; S3, sleeve machining, cold heading, gear rolling and turning are performed on the rough-machined sleeve body respectively; S4, heat treatment, heat treatment of the bolt body and the sleeve body; S5, Surface treatment, grinding the surfaces of the bolt body and the sleeve body; S6, Assembly: Insert the sleeve body into the bolt body, stamp the sleeve surface to make the sleeve recessed inward and form a limiting protrusion, and then fix the limiting ring to the bolt body. S7, Inspection: Check the connection between the sleeve body and the bolt body, tighten the connection, and proceed with subsequent packaging. In step S1, the sleeve body selected has a support block on its inner wall. The support block is positioned opposite to the limiting ring and is used to support the machining of the limiting ring. In step S3, the tooth rolling is used to machine the limiting groove, and the turning is used to cut the support block.

[0025] By adopting the above technical solution, the bolt body and the sleeve body are processed separately, and then the sleeve body is limited by the limiting ring and the stamped limiting protrusion, so that the bolt body and the sleeve body form an integral structure. When processing the sleeve, since there are a large number of longitudinal and transverse limiting grooves, the support block can generate a supporting force for processing the limiting grooves, thereby reducing the deformation of the sleeve during processing of the limiting grooves, which would affect the processing of the sleeve and improve the accuracy of the sleeve processing.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. During use, the limiting ring and limiting protrusion prevent the sleeve from detaching from the bolt body, forming an integrated bolt sleeve assembly. The bolt sleeve assembly is inserted into the plastic housing, with the limiting ring and plastic housing having an interference fit, thus restricting the sleeve. When the plastic housing is subjected to high temperatures, the plastic softens. Due to the interference fit of the sleeve body, the softened plastic material is incorporated into the limiting groove. The design, with an angle between the groove and the sleeve body axis, allows the plastic and the limiting groove to restrict the movement of the sleeve body, improving the stability of the sleeve body. This design also ensures more even stress distribution on the outer wall of the limiting ring. When the plastic vibrates, the vibration force is more evenly distributed, reducing gaps between the sleeve body and the plastic body and ensuring the stability of the sleeve body. 2. The chamfering allows the limiting block to be inserted into the plastic housing more easily, reducing the resistance of the sleeve installation and improving the ease of installing the sleeve body. In conjunction with the use of the limiting slot, the movement of the sleeve can be further limited after the plastic material softens due to heat, thus improving the stability of the sleeve fixation. 3. The bolt body and the sleeve body are processed separately, and then the sleeve body is limited by the limiting ring and the stamped limiting protrusion, so that the bolt body and the sleeve body form an integral structure. When processing the sleeve, since there are a large number of longitudinal and transverse limiting grooves, the support block can generate support force for processing the limiting grooves, thereby reducing the deformation of the sleeve during processing of the limiting grooves, which would affect the processing of the sleeve and improve the accuracy of the sleeve processing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the processing technology of an integrated bolt sleeve assembly according to an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view of an integrated bolt sleeve assembly according to an embodiment of this application.

[0029] Figure 3 This is an unfolded view of the limiting ring in Embodiment 1 of this application.

[0030] Figure 4 This is a cross-sectional view of the support block in Embodiment 1 of this application.

[0031] Figure 5 This is a cross-sectional view of an integral bolt sleeve assembly according to Embodiment 2 of this application.

[0032] Figure 6 yes Figure 5 An enlarged schematic diagram of part A in the middle.

[0033] Reference numerals: 1. Bolt body; 2. Friction groove; 3. Friction protrusion; 4. Clamping flange; 5. Limiting protrusion; 6. Limiting retaining ring; 7. Mounting ring groove; 8. Insertion hole; 9. Threaded section; 10. Limiting ring; 101. Limiting retaining groove; 102. Chamfer; 11. Limiting groove; 12. Sleeve body; 13. Locking block; 14. Threaded groove; 15. Drive ring; 16. Sliding ring; 17. Insertion ring; 18. Limiting protrusion; 19. Connecting spring; 20. Limiting slide groove; 21. Limiting slide ring; 22. Limiting cavity; 23. Elastic element; 24. Support block; 25. Locking groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 —6 provides further details regarding this application.

[0035] This application discloses an integrated bolt sleeve assembly.

[0036] Example 1: Reference Figure 2 and Figure 3 An integrated bolt and sleeve assembly includes a bolt body 1 and a sleeve body 12. The bolt body 1 has an integrally formed threaded section 9. A retaining ring 6 is detachably connected to the bolt body 1. An installation ring groove 7 is formed on the outer wall of the bolt body 1. The retaining ring 6 is a retaining spring that engages within the installation ring groove 7. The sleeve body 12 has an insertion hole 8 that mates with the bolt body 1. A retaining protrusion 5 is fixed within the insertion hole 8. The retaining protrusion 5 cooperates with the retaining ring 6 to limit the position of the sleeve body 12. A retaining ring 10 is fixed on the sleeve body 12. Multiple retaining grooves 11 are crisscrossed on the surface of the retaining ring 10. The retaining grooves 11 are oriented at a 90-degree angle to the sleeve body 12, allowing the retaining ring 10 to fully abut against the surface of the plastic shell, increasing the friction of the retaining ring 10. Furthermore, when the plastic shell deforms, the deformed plastic shell is integrated into the retaining grooves 11, thus securing the plastic shell more firmly.

[0037] A chamfer 102 is provided on the side of the limiting block away from the bolt body 1. The chamfer 102 facilitates the insertion of the limiting ring 10 into the plastic housing, improving the ease of installation of the sleeve body 12. A limiting groove 101 is provided on the side of the limiting block closer to the bolt body 1. The limiting groove 101 can be engaged after the plastic housing softens, thereby increasing the firmness of the connection between the sleeve body 12 and the plastic housing.

[0038] The sleeve body 12 has an integrally formed clamping flange 4 on the side near the bolt body 1, which abuts against the bolt body 1. The clamping flange 4 has an integrally formed friction protrusion 3 on the side near the bolt body 1. The friction protrusion 3 has a triangular cross-section, and its width gradually decreases in the direction away from the sleeve body 12. The bolt body 1 has a friction groove 2 that engages with the friction protrusion 3, so that the connection between the bolt body 1 and the sleeve body 12 can be more secure.

[0039] A processing method for an integrated bolt sleeve assembly includes the following steps: S1, Material preparation, selecting the rough-machined bolt body 1 and sleeve body 12; S2, Bolt processing: The rough-machined bolt body 1 is subjected to cold heading, grooving and thread rolling to form a bolt body 1 with threaded section 9; S3, sleeve machining, cold heading, gear rolling and turning are performed on the rough-machined sleeve body 12 respectively; S4, heat treatment, heat treatment is performed on the bolt body 1 and the sleeve body 12 to enhance the strength of the bolt body 1 and the sleeve body 12. S5, Surface treatment: Grind the surfaces of the bolt body 1 and the sleeve body 12 to reduce surface burrs. S6, Assembly: Insert the sleeve body 12 into the bolt body 1, stamp the sleeve surface to make the sleeve recessed inward and form the limiting protrusion 5, and then fix the limiting ring 6 onto the bolt body 1. S7, Inspection: Check the connection between the sleeve body 12 and the bolt body 1, tighten the connection, and proceed with subsequent packaging. Reference Figure 4 In step S1, the sleeve body 12 selected has a support block 24 on its inner wall. The support block 24 is positioned opposite to the limiting ring 10 and is cylindrical. The support block 24 is used to support the machining of the limiting ring 10, thereby reducing the deformation of the sleeve body 12 when machining the limiting groove 11. In step S3, the gear rolling is used to machine the limiting groove 11, and the turning is used to cut the support block 24, thereby achieving the initial machining of the sleeve body 12.

[0040] The advantage of Example 1 is that, with this design, the use of a support ring can be added to the sleeve during rough machining, thereby reducing the deformation of the sleeve and ensuring the effect of sleeve machining. Furthermore, by using a limiting ring 10 and a limiting groove 11 in combination, the force on the outer wall of the limiting ring 10 can be more uniform. When the plastic vibrates, the force of the vibration can be distributed more evenly, thereby reducing the gap between the sleeve body 12 and the plastic body and ensuring the firmness of the sleeve body 12.

[0041] Example 2: Reference Figure 5 and Figure 6 An integrated bolt sleeve assembly differs from Embodiment 1 in that a sliding ring 16 is installed on the side of the sleeve body 12 away from the bolt body 1. An insert ring 17 is integrally formed on the side of the sliding ring 16 near the sleeve body 12. An insert groove is formed on the inner wall of the insert ring 17 for insertion and engagement. A limiting cavity 22 is formed on the side of the sliding ring 16 near the sleeve body 12. A locking block 13 is rotatably connected within the limiting cavity 22. An elastic element 23, which is a coil spring, is installed within the limiting cavity 22 to drive the locking block 13 to rotate outward. Multiple locking grooves 25 are formed on the side of the sleeve body 12 near the sliding ring 16 to engage with the locking block 13. When the sliding ring 16 moves away from the sleeve body 12, the elastic element 23 drives the locking block 13 to abut against the plastic housing. An abutting slope is formed on the side of the locking block 13 away from the sliding ring 16, abutting against the plastic housing. Multiple limiting protrusions 18 are provided on the abutting slope. A drive ring 15 is fixed to the inner wall of the sliding ring 16. The inner wall of the drive ring 15 has a threaded groove 14 that is threadedly connected to the threaded section 9, so that the sliding ring 16 can be moved more conveniently.

[0042] A limiting slip ring 21 is fixed to the outer wall of the insertion ring 17, and a limiting groove 20 is provided on the inner wall of the insertion groove to limit the limiting slip ring 21, thereby limiting the sliding distance of the sliding ring 16. A connecting spring 19 is fixed in the limiting groove 20. The connecting spring 19 is used to pull the limiting slip ring 21 closer to the sleeve body 12, increasing the pressure of the locking block 13 against the plastic shell and improving the stability of the sliding ring 16.

[0043] The implementation principle of Example 2 is as follows: Unlike Example 1, the sliding ring 16 is driven away from the sleeve body 12 by the bolt body 1, and under the action of the elastic element 23, the locking block 13 abuts against the plastic shell, thereby achieving the purpose of fixing the sleeve body 12 and improving the firmness of fixing the sleeve body 12.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated bolt sleeve assembly, characterized in that: The device includes a bolt body (1) and a sleeve body (12). The bolt body (1) is provided with a threaded section (9) and a limiting ring (6). The sleeve body (12) is provided with an insertion hole (8) that is inserted into the bolt body (1). A limiting protrusion (5) is provided in the insertion hole (8). The limiting protrusion (5) and the limiting ring (6) cooperate to limit the position of the sleeve body (12). A limiting ring (10) is provided on the sleeve body (12). The surface of the limiting ring (10) is provided with multiple limiting grooves (11) arranged in a crisscross pattern. The opening direction of the limiting grooves (11) is set at an angle to the axial direction of the sleeve body (12). A sliding ring (16) is provided on the side of the sleeve body (12) away from the bolt body (1). A plug-in ring (17) is provided on the side of the sliding ring (16) close to the sleeve body (12). A plug-in groove is provided on the inner wall of the plug-in hole (8) to engage with the plug-in ring (17). A limiting cavity (22) is provided on the side of the sliding ring (16) close to the sleeve body (12). A locking block (13) is rotatably connected in the limiting cavity (22). A device for driving the locking block (17) is provided in the limiting cavity (22). 3) An outwardly rotating elastic element (23) is provided on the side of the sleeve body (12) near the sliding ring (16) with multiple locking slots (25) that engage with the locking block (13). When the sliding ring (16) slides away from the sleeve body (12), the elastic element (23) drives the locking block (13) to abut against the plastic shell. The inner wall of the sliding ring (16) is provided with a driving ring (15). The inner wall of the driving ring (15) is provided with a threaded groove (14) that engages with the threaded section (9). The outer wall of the plug ring (17) is provided with a limiting slip ring (21), and the inner wall of the plug groove is provided with a limiting groove (20) for limiting the limiting slip ring (21); a connecting spring (19) is provided in the limiting groove (20), and the connecting spring (19) is used to pull the limiting slip ring (21) to move closer to the sleeve body (12).

2. The integrated bolt sleeve assembly according to claim 1, characterized in that: The limiting ring (10) has a chamfer (102) on the side away from the bolt body (1), and a limiting groove (101) is provided on the side of the limiting ring (10) close to the bolt body (1).

3. The integrated bolt sleeve assembly according to claim 1, characterized in that: The bolt body (1) has an installation ring groove (7) on its outer wall, and the limiting ring (6) is a retaining spring, which is engaged in the installation ring groove (7).

4. The integrated bolt sleeve assembly according to claim 1, characterized in that: The sleeve body (12) is provided with a clamping flange (4) on the side near the bolt body (1), and the clamping flange (4) abuts against the bolt body (1).

5. The integrated bolt sleeve assembly according to claim 4, characterized in that: The clamping flange (4) is provided with a plurality of friction protrusions (3) on the side close to the bolt body (1). The width of the friction protrusions (3) gradually decreases in the direction away from the sleeve body (12). The bolt body (1) is provided with friction grooves (2) that engage with the friction protrusions (3).

6. The integrated bolt sleeve assembly according to claim 1, characterized in that: The locking block (13) has an abutting slope on the side away from the sliding ring (16) that abuts against the plastic shell, and a plurality of limiting protrusions (18) are provided on the abutting slope.

7. A processing technology for an integrated bolt sleeve assembly, characterized in that, The method of using any one of the integrated bolt sleeve assemblies described in claims 1-6 includes the following steps: S1, Prepare materials, select the rough-machined bolt body (1) and sleeve body (12); S2, Bolt processing, cold heading, grooving and thread rolling are performed on the rough-machined bolt body (1) to form a bolt body (1) with threaded section (9); S3, sleeve machining, cold heading, gear rolling and turning are performed on the rough-machined sleeve body (12); S4, heat treatment, heat treatment is performed on the bolt body (1) and the sleeve body (12); S5, Surface treatment, grinding the surfaces of the bolt body (1) and the sleeve body (12); S6, Assembly: Insert the sleeve body (12) into the bolt body (1), stamp the sleeve surface to make the sleeve recessed inward and form a limiting protrusion (5), and then fix the limiting ring (6) onto the bolt body (1). S7, Inspection: Check the connection effect between the sleeve body (12) and the bolt body (1), tighten the connection and proceed with subsequent packaging. In step S1, the sleeve body (12) selected has a support block (24) on its inner wall. The support block (24) is positioned opposite to the limiting ring (10). The support block (24) is used to support the machining of the limiting ring (10). In step S3, the tooth rolling is used to machine the limiting groove (11), and the turning is used to cut the support block (24).

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