A type of wear-resistant double-ended bolt

Abstract

This utility model relates to the field of double-ended stud bolt technology and discloses a wear-resistant double-ended stud bolt, including a double-ended stud bolt body. The double-ended stud bolt body includes a nut integrally formed along its axial direction. A through groove is formed along the axial direction of the double-ended stud bolt body. Rubber plugs are interference-fitted to both ends of the through groove. A set of oil injection grooves is formed on the outer circumferential surface of both ends of the double-ended stud bolt body. This wear-resistant double-ended stud bolt is equipped with an oil injection mechanism that can apply pressure to the lubricating oil in the compression groove when the rotating block rotates slightly. This pushes the lubricating oil in the through groove to be evenly distributed through multiple oil injection grooves and flow to the meshing point between the double-ended stud bolt body and the external connecting parts. This ensures that all parts at the meshing point are adequately lubricated, thereby effectively reducing the friction coefficient between the double-ended stud bolt body and the external connecting parts, reducing wear, and improving the performance and service life of the double-ended stud bolt body.

Description

Technical Field

[0001] This utility model relates to the field of double-ended bolt technology, specifically a wear-resistant double-ended bolt. Background Technology

[0002] Double-ended studs, also known as double-ended bolts or double-ended studs, do not have a nut at one end like ordinary bolts. Instead, both ends are machined with external threads, and the middle is a smooth shank. Some specially designed ones also have a certain structure in the middle. They are mainly used to connect two thick parts that need to be disassembled frequently, or in situations where the structure is compact and ordinary bolts cannot meet the installation requirements.

[0003] An existing patent (publication number: CN214533921U) discloses a novel wear-resistant bolt, relating to the field of bolt technology. Its key technical features include: a bolt body comprising a screw and a nut; a bolt washer positioned between the screw and the nut; the bolt washer having several notches evenly distributed around its periphery; several first guide grooves opening towards the nut; each first guide groove being arranged in a circular array centered on the screw; the notches communicating with the first guide grooves; several second guide grooves opening on the screw; one end of each second guide groove communicating with a first guide groove; and the second guide grooves extending to the threads on the screw; a first wear-resistant metal layer being provided on the surface of the nut; and a torque element inserted into the top of the nut. This invention solves the problem that existing technologies cannot adequately protect the nut, thus enhancing the overall wear resistance of the bolt.

[0004] The above-mentioned bolts can solve the problem that existing technologies cannot protect the nuts well during use and enhance the overall wear resistance of the bolts. However, during use, when the bolt gets stuck during the bolt removal process, the first guide groove can be connected with the second guide groove on the outer wall of the screw to inject oil into the outside of the screw body. However, this method requires the lubricating oil to flow naturally, resulting in low oil injection efficiency and the lubricating oil cannot effectively enter the meshing point between the screw and the external connecting parts. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a wear-resistant double-ended bolt, which has advantages such as reduced wear and increased service life, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant double-ended bolt, comprising a double-ended bolt body, wherein the double-ended bolt body includes a nut integrally formed along its axial direction, the double-ended bolt body is provided with a through groove along its axial direction, and rubber plugs are interference-fitted to both ends of the through groove, and a set of oil injection grooves are provided on the outer circumferential surface of both ends of the double-ended bolt body, each oil injection groove being connected to the through groove;

[0007] A rotating block is rotatably connected to the circumferential surface of the double-ended bolt body. The rotating block is coaxially arranged with the double-ended bolt body, and an oil injection mechanism is provided inside the rotating block.

[0008] Furthermore, the oil injection mechanism includes an extrusion groove on the outer circumferential surface of the double-headed bolt body that communicates with the connecting groove. A slider is slidably inserted inside the extrusion groove. A notch is opened on the side of the rotating block away from the slider. Chamfers A are formed at the bottom ends of the inner walls on both sides of the notch.

[0009] The above solution, by setting chamfer A, allows chamfer A to contact the slider when the rotating block rotates, thereby pushing the slider to squeeze the lubricating oil inside the extrusion groove. This pressure forces the lubricating oil in the connecting groove to flow from multiple oil injection grooves to the meshing point between the double-ended bolt body and the external connecting parts, thus effectively lubricating the meshing parts, reducing friction and wear between the double-ended bolt body and the connecting parts, improving the wear resistance of the double-ended bolt body, and extending its service life. Furthermore, the two chamfers A can apply pressure to the slider regardless of whether the rotation is counterclockwise or clockwise. This bidirectional pressure design allows the double-ended bolt to adapt to various different rotation directions and working conditions.

[0010] Furthermore, the end of the slider away from the extrusion groove is circular.

[0011] The above solution reduces the friction between the slider seat and chamfer A during the rotation of the rotating block, thus making the rotation of the rotating block smoother.

[0012] Furthermore, an annular groove is provided at the other end of the slider, and a spring is fixedly connected to the inner wall of the annular groove. The other end of the spring is fixedly connected to the inner wall of the extrusion groove.

[0013] The above scheme allows the spring to fix the slider, preventing it from falling out of the extrusion groove. When oil is injected into the extrusion groove, the slider can be pulled out of the groove to inject oil. The deformation force of the spring can drive the slider back into the extrusion groove after the oil injection is completed. At the same time, the deformation force of the spring can push the slider to reset after the chamfer A separates from the slider. The annular groove can provide storage space for the spring, preventing the spring from being compressed to its limit and deformed due to the pressure of the slider.

[0014] Furthermore, the upper ends of the inner walls on both sides of the notch are rectangular, and a sealing block that matches the shape of the upper end of the notch is slidably inserted into the inside of the notch. Spherical grooves are provided on both sides of the sealing block along the length direction, and sliding grooves are provided on both sides of the inner walls of the notch along the length direction. An arc-shaped elastic sheet is fixedly connected to the inner wall of each sliding groove, and a locking bead is fixedly connected to the arc surface of each arc-shaped elastic sheet. Each locking bead engages with the corresponding spherical groove.

[0015] The above solution secures the sealing block within the notch by engaging the locking bead with the spherical groove, preventing accidental detachment. Furthermore, the elastic metal sheet pushes the locking bead to keep it within the spherical groove, thus locking the sealing block and further improving its stability.

[0016] Furthermore, a protrusion is fixedly connected to the side of the sealing block opposite to the extrusion bead.

[0017] The above solution improves the ease of operation of the sealing block by the staff, making it easier to disassemble and install the sealing block. The staff can use external tools to clamp the protrusion and pull the sealing block out of the notch, which facilitates the oil injection operation into the extrusion groove.

[0018] Furthermore, the nut has an arc-shaped groove on the side near the rotating block, and the rotating block is fixedly connected to the arc-shaped block on the side adjacent to the nut.

[0019] The above scheme, with the combination of the arc groove and the arc block, can guide and limit the rotation of the rotating block, ensuring that the rotating block can only rotate around the axial direction of the double-headed bolt body.

[0020] Furthermore, there are gaps between both ends of the arc-shaped block and the arc-shaped groove.

[0021] The above solution allows the chamfer A to contact the slider and push the slider to slide within the extrusion groove a certain distance during the rotation of the rotating block.

[0022] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0023] This wear-resistant double-ended stud bolt is equipped with an oil injection mechanism that applies pressure to the lubricating oil in the extrusion groove when the rotating block rotates slightly. This pressure pushes the lubricating oil in the connecting groove to be evenly distributed through multiple oil injection grooves and flowed to the meshing point between the double-ended stud bolt body and the external connecting parts. This ensures that all parts at the meshing point are adequately lubricated, thereby effectively reducing the coefficient of friction between the double-ended stud bolt body and the external connecting parts, reducing wear, and improving the performance and lifespan of the double-ended stud bolt body. Attached Figure Description

[0024] Figure 1 Cross-sectional view of the overall structure of this application Figure 1 ;

[0025] Figure 2 For this application Figure 1 Enlarged schematic diagram of the structure at point A;

[0026] Figure 3 This is an exploded view of the overall structure of this application;

[0027] Figure 4 This is a schematic diagram of the rotating block structure in this application;

[0028] Figure 5 This is a schematic diagram of the slider structure of this application;

[0029] Figure 6 This is a schematic diagram of the sealing block structure in this application;

[0030] Figure 7 Cross-sectional view of the overall structure of this application Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the overall structure of this application.

[0032] In the picture:

[0033] 1. Double-ended bolt body; 2. Nut; 3. Connecting groove; 4. Rubber plug; 5. Oil filling groove; 6. Rotating block;

[0034] 7. Oil injection mechanism;

[0035] 701. Extrusion groove; 702. Slider; 703. Notch; 704. Chamfer A;

[0036] 8. Annular groove; 9. Spring; 10. Sealing block; 11. Spherical groove; 12. Slide groove; 13. Arc-shaped elastic sheet; 14. Bead; 15. Protrusion; 16. Arc-shaped groove; 17. Arc-shaped block. Detailed Implementation

[0037] 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 embodiments of this application, and not all embodiments. 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.

[0038] Please see Figures 1-8This embodiment of a wear-resistant double-ended stud bolt includes a double-ended stud bolt body 1, which includes a nut 2 integrally formed along its axial direction. A through groove 3 is formed through the double-ended stud bolt body 1 along its axial direction. Rubber plugs 4 are interference-fitted to both ends of the through groove 3. The rubber plugs 4 seal both ends of the through groove 3, preventing lubricating oil from leaking out. A set of oil injection grooves 5 are formed on the outer circumferential surface of both ends of the double-ended stud bolt body 1, and each oil injection groove 5 is connected to the through groove 3. The connection is achieved by opening oil injection grooves 5 on the outer circumferential surfaces at both ends of the double-ended bolt body 1 and connecting grooves 3, which can form a lubricating oil delivery channel. When lubricating oil is injected into the connecting groove 3, the lubricating oil can be evenly distributed through multiple oil injection grooves 5 via the lubricating oil delivery channel and flow to the meshing point between the double-ended bolt body 1 and the external connecting parts. This ensures that all parts at the meshing point can be fully lubricated, thereby effectively reducing the friction coefficient between the double-ended bolt body 1 and the external connecting parts, reducing wear, and improving the performance and life of the double-ended bolt body 1.

[0039] A rotating block 6 is rotatably connected to the circumferential surface of the double-ended bolt body 1. The rotating block 6 is coaxially arranged with the double-ended bolt body 1, and an oil injection mechanism 7 is provided inside the rotating block 6.

[0040] The oiling mechanism 7 includes a compression groove 701 on the outer circumference of the double-ended bolt body 1, which communicates with the connecting groove 3. A slider 702 is slidably inserted into the compression groove 701. A notch 703 is provided on the side of the rotating block 6 away from the slider 702. The bottom ends of the inner walls on both sides of the notch 703 are chamfered A704. The connecting groove 3 and the compression groove 701 are initially filled with lubricating oil. By setting the chamfer A704, when the rotating block 6 rotates, the chamfer A704 can contact the slider 702, thereby pushing the slider 702 to squeeze the lubricating oil in the compression groove 701. The pressure pushes the lubricating oil in the connecting groove 3 to flow from the multiple oiling grooves 5 to the double-ended bolt. The engagement point between the bolt body 1 and the external connecting parts effectively lubricates the engagement area, reduces friction and wear between the double-ended bolt body 1 and the connecting parts, improves the wear resistance of the double-ended bolt body 1, and extends its service life. Furthermore, the two chamfers A704 apply pressure to the slider 702 regardless of whether it rotates clockwise or counterclockwise. This bidirectional pressure design allows the double-ended bolt to adapt to various rotation directions and working conditions. The end of the slider 702 furthest from the extrusion groove 701 is circular. This circular design reduces friction between the rotating block 6 and the chamfer A704 during rotation, resulting in smoother rotation of the rotating block 6.

[0041] The other end of the slider 702 is provided with an annular groove 8. A spring 9 is fixedly connected to the inner wall of the annular groove 8. The other end of the spring 9 is fixedly connected to the inner wall of the extrusion groove 701. The spring 9 is provided to fix the slider 702 and prevent the slider 702 from falling out of the extrusion groove 701. When oil is injected into the extrusion groove 701, the slider 702 can be pulled out of the extrusion groove 701 to inject oil into the extrusion groove 701. Through the deformation force of the spring 9, the slider 702 can be driven back into the extrusion groove 701 after the oil injection is completed. At the same time, the deformation force of the spring 9 can push the slider 702 to reset after the chamfer A704 separates from the slider 702. The annular groove 8 can provide storage space for the spring 9 to prevent the spring 9 from being compressed to the limit and deformed by the pressure of the slider 702.

[0042] The upper ends of the inner walls on both sides of the notch 703 are rectangular, and a sealing block 10 that matches the shape of the upper end of the notch 703 is slidably inserted inside the notch 703. Spherical grooves 11 are formed on both sides of the sealing block 10 along its length. Sliding grooves 12 are formed on both sides of the inner wall of the notch 703 along its length. An arc-shaped elastic sheet 13 is fixedly connected to the inner wall of each sliding groove 12. The arc-shaped elastic sheet 13 is made of elastic metal, specifically spring steel. A retaining bead 14 is fixedly connected to the arc-shaped surface of each arc-shaped elastic sheet 13. Each retaining bead 14 engages with the corresponding spherical groove 11. Through the engagement of the retaining bead 14 with the spherical groove 11, the notch is sealed. The plug 10 is stably fixed within the notch 703 to prevent accidental detachment. The elastic metal sheet pushes the retaining bead 14 to keep it always within the spherical groove 11, thus locking the plug 10 and further improving its stability. A protrusion 15 is fixedly connected to the side of the plug 10 away from the extrusion bead. The protrusion 15 improves the ease of operation for workers, making it easier to disassemble and install the plug 10. Workers can use external tools to clamp the protrusion 15 and pull the plug 10 out of the notch 703, facilitating the oil injection operation into the extrusion groove 701.

[0043] The nut 2 has an arc-shaped groove 16 on its side near the rotating block 6. An arc-shaped block 17 is fixedly connected to the side of the rotating block 6 adjacent to the nut 2. The matching arrangement of the arc-shaped groove 16 and the arc-shaped block 17 can guide and limit the rotation of the rotating block 6, ensuring that the rotating block 6 can only rotate around the axis of the double-headed bolt body 1. There are gaps between the two ends of the arc-shaped block 17 and the arc-shaped groove 16. The gaps are designed to allow the chamfer A704 to contact the slider 702 and push the slider 702 to slide a certain distance in the extrusion groove 701 during the rotation of the rotating block 6.

[0044] The working principle of the above embodiment is as follows: First, when disassembling the double-ended bolt body 1, the worker uses a tool to clamp the protrusion 15 and pull the sealing block 10 out of the notch 703. Then, the worker pulls the slider 702 out of the notch 703. After the slider 702 separates from the extrusion groove 701, the worker can inject lubricating oil into the connecting groove 3 through the extrusion groove 701 until the lubricating oil overflows from the connecting groove 3 and enters the extrusion groove 701. Then, the slider 702 is placed into the extrusion groove 701, and the sealing block 10 is installed. In its original position, when the operator uses a tool to rotate the rotating block 6, the chamfer A704 can contact the slider 702 and push the slider 702 to apply pressure to the lubricating oil in the extrusion groove 701, so that the pressure is transmitted to the connection point and discharged from multiple oil injection grooves 5 to the meshing point between the double-ended bolt body 1 and the external connecting parts, which plays a role in lubricating the meshing point between the double-ended bolt body 1 and the external connecting parts. Finally, the operator uses a tool to clamp the nut 2 and rotates the double-ended bolt body 1 through the nut 2 to disassemble the double-ended bolt body 1.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant double-ended stud, comprising a double-ended stud body (1), characterized in that: The double-ended bolt body (1) includes a nut (2) integrally formed along its axial direction. The double-ended bolt body (1) has a through groove (3) that passes through the double-ended bolt body (1) along its axial direction. Both ends of the through groove (3) are connected with rubber plugs (4) by interference fit. A set of oil injection grooves (5) are opened on the outer circumferential surface of both ends of the double-ended bolt body (1). Each oil injection groove (5) is connected to the through groove (3). The circumferential surface of the double-headed bolt body (1) is rotatably connected to a rotating block (6), which is coaxially arranged with the double-headed bolt body (1). An oil injection mechanism (7) is provided inside the rotating block (6).

2. The wear-resistant double-ended bolt according to claim 1, characterized in that: The oil injection mechanism (7) includes a double-headed bolt body (1) with an extrusion groove (701) on its outer circumference that communicates with the connecting groove (3). A slider (702) is slidably inserted into the extrusion groove (701). A notch (703) is opened on the side of the rotating block (6) away from the slider (702). A chamfer A (704) is formed at the bottom of the inner wall on both sides of the notch (703).

3. The wear-resistant double-ended bolt according to claim 2, characterized in that: The slider (702) is circular at the end away from the extrusion groove (701).

4. A wear-resistant double-ended stud according to claim 2 or 3, characterized in that: The other end of the slider (702) is provided with an annular groove (8), and a spring (9) is fixedly connected to the inner wall of the annular groove (8). The other end of the spring (9) is fixedly connected to the inner wall of the extrusion groove (701).

5. A wear-resistant double-ended bolt according to claim 2, characterized in that: The upper ends of the inner walls on both sides of the notch (703) are rectangular, and a sealing block (10) that matches the shape of the upper end of the notch (703) is slidably inserted into the notch (703). Spherical grooves (11) are provided on both sides of the sealing block (10) along the length direction. Sliding grooves (12) are provided on both sides of the inner walls of the notch (703) along the length direction. An arc-shaped elastic sheet (13) is fixedly connected to the inner wall of each sliding groove (12). A bead (14) is fixedly connected to the arc surface of each arc-shaped elastic sheet (13). Each bead (14) is engaged with the corresponding spherical groove (11).

6. A wear-resistant double-ended bolt according to claim 5, characterized in that: The sealing block (10) has a protrusion (15) fixedly connected to the side opposite to the extrusion bead.

7. The wear-resistant double-ended bolt according to claim 1, characterized in that: The nut (2) has an arc-shaped groove (16) on the side near the rotating block (6), and an arc-shaped block (17) is fixedly connected to the side of the rotating block (6) adjacent to the nut (2).

8. A wear-resistant double-ended bolt according to claim 7, characterized in that: There are gaps between both ends of the arc-shaped block (17) and the arc-shaped groove (16).

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