Fastener for high-precision mechanical assembly

Abstract

The utility model discloses a fastener for high-precision mechanical assembly, and relates to the technical field of fasteners, the fastener comprises a screw cap, a stud is fixedly arranged at the lower end of the screw cap, two limiting sleeves are arranged on the outer surface of the stud, the two limiting sleeves are attached to each other, threaded rings are fixedly arranged at the upper ends of the limiting sleeves, and the threaded rings are connected with the threaded rings. According to the fastener for high-precision mechanical assembly, through the design of the two limiting sleeves and the threaded ring and the annular groove which are matched with each other, the contact area is increased, the connection tightness is improved, and the fastening effect is improved. According to the invention, the structure is simple, the assembly looseness and displacement are reduced, the stability is higher, the sectional limiting sleeve can be flexibly adjusted and combined to adapt to different assembly conditions and requirements, and the reinforcing tube and the fixing sleeve are arranged to provide additional support and protection for the whole fastener, so that the compression resistance and vibration resistance of the fastener are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fastener for high-precision mechanical assembly. Background Art

[0002] High-precision fasteners for mechanical assembly are indispensable and important components in mechanical assembly. These fasteners have extremely high precision and reliability, and can ensure tight and stable connections between mechanical parts. They play a key role in fields with strict precision requirements such as aerospace, precision instrument manufacturing, and high-end automotive industries.

[0003] However, the prior art still has the following problems:

[0004] First, most of the high-precision mechanical assembly fasteners in the prior art do not use a segmented limiting structure, so the contact area is limited, the tightness of the connection needs to be improved, there may be looseness and displacement during assembly, the stability is not high, and the integrated limiting structure is not convenient for flexible adjustment and combination, and it is difficult to adapt to different assembly conditions and requirements;

[0005] Secondly, the high-precision mechanical assembly fasteners in the prior art are not provided with a reinforcing structure for stabilization. As a result, most fasteners cannot provide effective support and protection for the entire fastener, cannot enhance its compression and vibration resistance, and are prone to slippage during the fastening process, resulting in reduced connection reliability.

[0006] In view of the above problems, the inventor proposes a high-precision mechanical assembly fastener to solve the above problems. Utility Model Content

[0007] In order to solve the problem of not using a segmented limiting structure and not having a reinforcing structure for stabilization, the utility model aims to provide a high-precision fastener for mechanical assembly.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions: a high-precision mechanical assembly fastener, including a screw cover, a stud is fixedly provided at the lower end of the screw cover, and two limit sleeves are provided on the outer surface of the stud, and the two limit sleeves are fitted together, and a threaded ring is fixedly provided at the upper end of the limit sleeve, and a ring groove is provided at the lower end of the limit sleeve to cooperate with the threaded ring, and when the limit sleeve is fitted, the outer surface of the threaded ring is fitted with the corresponding inner wall of the ring groove, and the upper ends of the limit sleeve and the threaded ring are jointly provided with a through-type first threaded groove for cooperating with the stud, and the outer surfaces of the two limit sleeves are jointly sleeved with a reinforcing tube, and the outer surface of the reinforcing tube is sleeved with a fixing sleeve.

[0009] Preferably, four clamping strips are fixedly provided on the outer surfaces of the two limit sleeves, and a strip groove for cooperating with the clamping strip is provided on the inner surface of the reinforcement tube, and the outer surface of the clamping strip is fitted with the inner wall of the strip groove, a threaded sleeve is fixedly provided on the lower side of the outer surface of the reinforcement tube, and a second threaded groove for cooperating with the threaded sleeve is provided on the lower side of the inner surface of the fixed sleeve, and an anti-slip washer is fixedly provided on the upper end of the reinforcement tube, and the upper end of the anti-slip washer is at the same height as the upper end of the upper threaded ring.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model increases the contact area and the tightness of the connection through the design of two limit sleeves and matching threaded rings and ring grooves, reduces the looseness and displacement of the assembly, has high stability, and the segmented limit sleeve design can be flexibly adjusted and combined to adapt to different assembly conditions and requirements;

[0012] 2. The utility model provides additional support and protection for the entire fastener by reinforcing the tube and the fixing sleeve, thereby enhancing its compression and vibration resistance. The anti-slip gasket can increase friction and reduce sliding during the fastening process, further improving the reliability of the connection and facilitating maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 This is a cross-section of a limit sleeve and an exploded view of the overall structure of the utility model.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the reinforcing tube and the fixing sleeve of the utility model.

[0017] In the figure: 1, screw cover; 11, stud; 12, smooth disk; 13, cross groove; 14, arc groove; 2, limit sleeve; 21, threaded ring; 22, ring groove; 23, first threaded groove; 24, positioning column; 25, column groove; 3, reinforcement tube; 31, clamping strip; 32, strip groove; 33, threaded sleeve; 4, fixing sleeve; 41, second threaded groove; 42, anti-slip washer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1: Figure 1-2 As shown, the utility model provides a high-precision mechanical assembly fastener, including a screw cover 1, a stud 11 is fixedly provided at the lower end of the screw cover 1, and two limiting sleeves 2 are provided on the outer surface of the stud 11, and the two limiting sleeves 2 are fitted with each other, and a threaded ring 21 is fixedly provided at the upper end of the limiting sleeve 2, and a ring groove 22 used to cooperate with the threaded ring 21 is provided at the lower end of the limiting sleeve 2, and the upper ends of the limiting sleeve 2 and the threaded ring 21 are jointly provided with a through-type first threaded groove 23 used to cooperate with the stud 11, and the outer surfaces of the two limiting sleeves 2 are jointly sleeved with a reinforcing tube 3, and the outer surface of the reinforcing tube 3 is sleeved with a fixing sleeve 4, the screw cover 1, the limiting sleeve 2, the reinforcing tube 3 and the fixing sleeve 4 are all made of titanium alloy, the screw cover 1 and the stud 11 cooperate with the limiting sleeve 2 to form a bolt structure, and the reinforcing tube 3 and the fixing sleeve 4 are used as auxiliary reinforcing structures, and the fastener composed of titanium alloy material has the advantages of high strength and light weight, which can reduce the overall weight, and at the same time To maintain sufficient strength, the stud 11 can be threadedly connected to the limiting sleeve 2. Two limiting sleeves 2 are provided. When the fixing effect needs to be strengthened, the two limiting sleeves 2 can be spliced ​​together and then installed in threaded cooperation on the outer surface of the stud 11 through the first bolt groove 23. The splicing is specifically to insert the threaded ring 21 groove into the corresponding ring groove 22. In this way, more threads on the outer surface of the stud 11 can be tightened. When it is necessary to keep the structure of the stud 11 longer, the fixing effect is good and it can be applied to more scenarios. The two mutually fitting limiting sleeves 2 and the matching threaded ring 21 and ring groove 22 design increase the contact area and the tightness of the connection, reduce the looseness and displacement that may occur during the assembly process, thereby improving the stability of the entire fastener connection, and the segmented limiting sleeve 2 design allows for flexible adjustment and combination according to actual needs during the installation process to adapt to different assembly conditions and requirements.

[0020] Four positioning posts 24 are fixedly provided at the lower end of the limiting sleeve 2, and four post grooves 25 for cooperating with the positioning posts 24 are opened at the upper end of the limiting sleeve 2. When two limiting sleeves 2 are spliced, the positioning posts 24 are inserted into the corresponding post grooves 25 to assist in positioning, thereby improving the stability of the splicing.

[0021] A smooth disk 12 is fixedly provided at the upper end of the screw cover 1, and a cross groove 13 is opened at the upper end of the smooth disk 12. A plurality of arc grooves 14 are opened on the outer surface of the screw cover 1, and the plurality of arc grooves 14 are distributed in a ring shape. The cross groove 13 on the smooth disk 12 can cooperate with the screwing in of the stud 11, and the arc groove 14 makes the outer surface of the screw cover 1 more convenient to screw manually.

[0022] Embodiment 2: Figure 3 As shown, four clamping strips 31 are fixedly arranged on the outer surfaces of the two limit sleeves 2, and the four clamping strips 31 at the same height are distributed in an annular shape, and a strip groove 32 for matching the clamping strip 31 is provided on the inner surface of the reinforcing tube 3, a threaded sleeve 33 is fixedly arranged on the lower side of the outer surface of the reinforcing tube 3, and a second threaded groove 41 for matching the threaded sleeve 33 is provided on the lower side of the inner surface of the fixing sleeve 4, and an anti-slip gasket 42 is fixedly arranged on the upper end of the reinforcing tube 3, and the limit sleeve 2 is inserted into the clamping strip 31 through the strip groove 32 and is sleeved on the two limit sleeves 2, and the fixing sleeve 4 is fixed through the The threaded sleeve 33 is matched with the thread of the second thread groove 41 and is sleeved on the reinforcing tube 3. The anti-skid washer 42 contacts the mechanical surface that needs to be fastened. The setting of the reinforcing tube 3 and the fixing sleeve 4 provides additional support and protection for the entire fastener, enhances its compression and vibration resistance, and the anti-skid washer 42 can increase friction and reduce sliding during the fastening process, further improving the reliability of the connection. The matching of the threaded sleeve 33 and the second thread groove 41 makes the installation and disassembly of the reinforcing tube 3 and the fixing sleeve 4 more convenient, and facilitates maintenance and replacement.

[0023] Working principle: the screw cap 1 and the stud 11 cooperate with the limiting sleeve 2 to form a bolt structure, and the reinforcing tube 3 and the fixing sleeve 4 serve as auxiliary reinforcing structures. The fastener made of titanium alloy has the advantages of high strength and light weight, which can reduce the overall weight while maintaining sufficient strength. The stud 11 can be threadedly connected to the limiting sleeve 2. There are two limiting sleeves 2. When it is necessary to strengthen the fixing effect, the two limiting sleeves 2 can be spliced ​​together, and then the first thread groove 23 is threadedly installed on the outer surface of the stud 11. The splicing is specifically to insert the threaded ring 21 groove into the corresponding ring groove 22, so that more threads on the outer surface of the stud 11 can be tightened. When it is necessary to keep the stud 11 structure longer, the fixing effect is good, and it can be applied to more scenes. The two mutually fitting limiting sleeves 2 and the matching threaded ring 21 and ring groove 22 design increase the contact area and the tightness of the connection, reduce the looseness and displacement that may occur during the assembly process, thereby improving the stability of the entire fastener connection, and the segmented limiting sleeve 2 design allows for flexible adjustment and combination according to actual needs during the installation process to adapt to different assembly conditions and requirements;

[0024] When two limiting sleeves 2 are spliced, the positioning column 24 is inserted into the corresponding column groove 25 to complete the positioning assistance, thereby improving the stability of the splicing;

[0025] The cross groove 13 on the smooth disk 12 can cooperate with the screwing of the stud 11, and the arc groove 14 makes the outer surface of the screw cover 1 more convenient to manually screw;

[0026] The limiting sleeve 2 is inserted into the clamping strip 31 through the strip groove 32 and is sleeved on the two limiting sleeves 2, while the fixing sleeve 4 is sleeved on the reinforcing tube 3 through the threaded cooperation of the threaded sleeve 33 and the second threaded groove 41. The anti-skid washer 42 contacts the mechanical surface that needs to be fastened. The setting of the reinforcing tube 3 and the fixing sleeve 4 provides additional support and protection for the entire fastener, enhances its compression and vibration resistance, and the anti-skid washer 42 can increase friction and reduce sliding during the fastening process, further improving the reliability of the connection. The cooperation of the threaded sleeve 33 and the second threaded groove 41 makes the installation and disassembly of the reinforcing tube 3 and the fixing sleeve 4 more convenient, and facilitates maintenance and replacement.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A high-precision mechanical assembly fastener, comprising a screw cap (1), characterized in that: A stud (11) is fixedly provided at the lower end of the screw cover (1), and two limiting sleeves (2) are provided on the outer surface of the stud (11). The two limiting sleeves (2) are fitted to each other, and a threaded ring (21) is fixedly provided at the upper end of the limiting sleeve (2). A ring groove (22) for matching with the threaded ring (21) is provided at the lower end of the limiting sleeve (2). A through-type first threaded groove (23) for matching with the stud (11) is provided at the upper ends of the limiting sleeve (2) and the threaded ring (21). A reinforcing tube (3) is sleeved on the outer surfaces of the two limiting sleeves (2), and a fixing sleeve (4) is sleeved on the outer surface of the reinforcing tube (3).

2. A high-precision mechanical assembly fastener as claimed in claim 1, characterized in that: A threaded sleeve (33) is fixedly provided on the lower side of the outer surface of the reinforcing tube (3), and a second threaded groove (41) for use with the threaded sleeve (33) is provided on the lower side of the inner surface of the fixing sleeve (4), and an anti-slip washer (42) is fixedly provided on the upper end of the reinforcing tube (3).

3. A high-precision mechanical assembly fastener as claimed in claim 1, characterized in that: Four positioning columns (24) are fixedly provided at the lower end of the limiting sleeve (2), and four column grooves (25) for cooperating with the positioning columns (24) are provided at the upper end of the limiting sleeve (2).

4. A high-precision mechanical assembly fastener as claimed in claim 1, characterized in that: A smooth disk (12) is fixedly provided at the upper end of the screw cover (1), and a cross groove (13) is provided at the upper end of the smooth disk (12).

5. A high-precision mechanical assembly fastener as claimed in claim 1, characterized in that: The outer surface of the screw cover (1) is provided with a plurality of arc grooves (14), and the plurality of arc grooves (14) are distributed in a ring shape.

6. A high-precision mechanical assembly fastener as claimed in claim 1, characterized in that: The screw cover (1), the limiting sleeve (2), the reinforcing tube (3) and the fixing sleeve (4) are all made of titanium alloy.

7. A high-precision mechanical assembly fastener as claimed in claim 2, characterized in that: Four clamping strips (31) are fixedly provided on the outer surfaces of the two limiting sleeves (2), and strip grooves (32) used in conjunction with the clamping strips (31) are provided on the inner surface of the reinforcing tube (3).

8. A high-precision mechanical assembly fastener as claimed in claim 7, characterized in that: The four clamping strips (31) located at the same height are distributed in a ring shape.

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