A bolt fastener

Abstract

This utility model belongs to the field of fastener technology, specifically relating to a bolt fastener, including: a bolt, the bolt including a stud body and a prismatic head at its top; a preload compensation component, the preload compensation component being disposed at the bottom of the prismatic head; and an anti-slip structure, the anti-slip structure being disposed at the bottom of the preload compensation component, used to solve the problem that during the use of the bolt fastener in the screw hole, vibration factors can easily cause the bolt fastener to loosen in the screw hole, or even cause the bolt fastener to fall off completely, resulting in poor fastening effect.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, specifically relating to a bolt fastener. Background Technology

[0002] Bolts are a wide range of mechanical parts used for fastening connections, found in various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, meters, and supplies. Traditional bolts are fastened using a combination of bolts and threaded holes.

[0003] However, during the use of bolts and fasteners, vibration can easily cause them to loosen inside the bolt holes, or even fall out completely, resulting in poor fastening performance. Utility Model Content

[0004] Based on the problems mentioned in the background art above, this utility model provides a bolt fastener to solve the problem that during the use of bolt fasteners screwed into screw holes, vibration factors can easily cause the bolt fasteners to loosen in the screw holes, or even cause the bolt fasteners to fall off completely, resulting in poor fastening effect.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A bolt fastener, comprising:

[0007] A bolt, the bolt comprising a stud body and a prismatic head at its top;

[0008] A preload compensation component is provided at the bottom of the prismatic screw head;

[0009] An anti-slip structure is provided at the bottom of the preload compensation component.

[0010] Based on the above technical solution, the present invention has made the following improvements:

[0011] Furthermore, the preload compensation component includes a sleeve and a cylinder. The sleeve is fixedly disposed on the bottom periphery of the prismatic screw head. The sleeve has multiple limiting grooves arranged in an array on its periphery wall. The cylinder is fitted inside the bottom of the sleeve, and the central through hole of the cylinder is fitted onto the stud. Multiple clips are arranged in an array on the periphery wall of the cylinder, and each clip is bent and locked in the corresponding limiting groove. A stabilizing sleeve with a corresponding position is provided on the bottom of the prismatic screw head and the bottom wall of the cylinder. A spring is provided between the two stabilizing sleeves.

[0012] Furthermore, the anti-slip structure includes extrusion plates, and multiple extrusion plates are provided, all of which are fixedly arranged in a ring array on the outer bottom wall of the cylinder. The extrusion plates are elastic deformable plates.

[0013] Furthermore, the card is a plastic deformation sheet.

[0014] Furthermore, the junction of the stud and the prismatic screw head has a tapered transition.

[0015] Furthermore, a hexagonal hole is provided in the center of the top of the prismatic screw head.

[0016] The beneficial effects of this utility model are:

[0017] 1. With the preload compensation component, when the stud is screwed into the threaded hole on the connector, and the bottom of the preload compensation component is pressed tightly against the top wall of the connector, the preload compensation component can continuously provide preload to the stud, making it difficult for the stud to loosen and fall out of the threaded hole.

[0018] 2. With the anti-slip structure, when the bottom of the preload compensation component is tightly pressed against the top wall of the connector, the anti-slip structure can prevent the entire bolt fastener from rotating and causing the stud to loosen and unscrew from the bolt hole. Attached Figure Description

[0019] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0020] Figure 1 This is a structural diagram of a bolt fastener according to the present invention;

[0021] Figure 2 This is a cross-sectional view of a bolt fastener according to the present invention.

[0022] The attached diagram is labeled as follows:

[0023] 101. Stud; 102. Prismatic screw head; 103. Hexagonal hole; 201. Sleeve; 202. Cylinder; 203. Limiting groove; 204. Card; 205. Stabilizing sleeve; 206. Spring; 301. Extrusion plate. Detailed Implementation

[0024] like Figures 1-2 As shown, a bolt fastener includes:

[0025] The bolt includes a stud body 101 and a prismatic head 102 at its top. The bolt can be turned by engaging the jaws of a wrench with the prismatic head 102. A hexagonal hole 103 is provided in the center of the top of the prismatic head 102. The bolt can be turned by engaging the end of an Allen wrench with the hexagonal hole 103. The junction of the stud body 101 and the prismatic head 102 has a tapered transition, which can reduce the internal stress at this point and enhance the strength at this point.

[0026] A preload compensation component is provided at the bottom of the prismatic screw head 102. The preload compensation component includes a sleeve 201 and a cylinder 202. The sleeve 201 is fixedly installed on the bottom periphery of the prismatic screw head 102. Multiple limiting grooves 203 are arranged in an array on the periphery of the sleeve 201. The cylinder 202 is fitted inside the bottom of the sleeve 201, and the central through hole of the cylinder 202 is fitted onto the stud body 101. Multiple clips 204 are arranged in an array on the periphery of the cylinder 202. The clips 204 are plastic deformation pieces. The original state of the clips 204 is vertical. By bending the clips 204, they can be bent. Each clip 204 is bent and locked in the corresponding limiting groove 203. A corresponding stabilizing sleeve 205 is provided on the bottom of the prismatic screw head 102 and the inner bottom wall of the cylinder 202. A spring 206 is provided between the two stabilizing sleeves 205.

[0027] When assembling the preload compensation component, the spring 206 is placed inside the stabilizing sleeve 205 of the cylinder 202, and then the cylindrical part of the cylinder 202 is placed inside the sleeve 201. Each clip 204 is aligned with the corresponding limiting groove 203. Then, by moving each clip 204, each clip 204 is bent and locked in the corresponding limiting groove 203, thereby completing the assembly, so that the spring 206 is located between the two stabilizing sleeves 205.

[0028] The anti-slip structure is set at the bottom of the pre-tightening force compensation component. The anti-slip structure includes extrusion plates 301. Multiple extrusion plates 301 are provided and are fixedly arranged in a ring array on the outer bottom wall of the cylinder 202. The extrusion plates 301 are elastic deformation plates. The extrusion plates 301 can elastically deform around the joint with the cylinder 202, so that each extrusion plate 301 can be tightly squeezed together.

[0029] In use, by screwing the stud 101 into the screw hole on the connecting plate, the bottom of the cylinder 202 is pressed tightly against the top surface of the connecting plate, causing the spring 206 to be compressed and the card 204 to be in contact with the top wall of the limiting groove 203 (see attached diagram). Figure 2 As shown), in a static state, the spring 206 is compressed, and its rebound force continues to act between the prismatic screw head 102 and the connecting plate, which is equivalent to providing a constant preload base value for the bolt system;

[0030] Under dynamic (vibration) conditions, the vibration may cause minor wear, indentation, or creep on the surface of the connecting plate, which will result in a slight increase in the effective length of the bolt, thus reducing the preload of the conventional bolt. However, with the structural improvement of this design, once any slight gap tendency appears, the compressed spring 206 will immediately release further, pushing the prismatic screw head 102 and the connecting plate away, thereby dynamically compensating for this slight length change and maintaining the preload. Furthermore, due to the presence of the compressed spring 206, the bolt will have a continuous normal clamping force, which will enhance the friction between the stud body 101 and the threaded hole connection surface and maintain sufficient clamping force.

[0031] Meanwhile, after the bottom of the cylinder 202 is tightly pressed against the top surface of the connecting plate, the extrusion plates 301 at the bottom of the cylinder 202 will also be squeezed together. Since the extrusion plates 301 are elastic plates with rebound force, a pre-tightening force is added between the bottom of the cylinder 202 and the top surface of the connecting plate. When the extrusion plates 301 are tightly squeezed together, their bottom will be uneven (non-smooth surface), which can enhance the friction between the bottom of the cylinder 202 and the top surface of the connecting plate, and further prevent the entire bolt fastener from rotating.

[0032] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A bolted joint, characterized by: include: A bolt, the bolt comprising a stud body (101) and a prismatic head (102) at its top; A preload compensation component is provided at the bottom of the prismatic screw head (102); An anti-slip structure is provided at the bottom of the preload compensation component.

2. A bolt fastener according to claim 1, wherein: The preload compensation component includes a sleeve (201) and a cylinder (202). The sleeve (201) is fixedly disposed on the bottom periphery of the prismatic screw head (102). The sleeve (201) has multiple limiting grooves (203) arranged in an array on its periphery wall. The cylinder (202) is sleeved inside the bottom of the sleeve (201), and the central through hole of the cylinder (202) is sleeved on the stud (101). Multiple cards (204) are arranged in an array on the periphery wall of the cylinder (202). Each card (204) is bent and locked in the corresponding limiting groove (203). The bottom of the prismatic screw head (102) and the inner bottom wall of the cylinder (202) are both provided with corresponding stabilizing sleeves (205). A spring (206) is provided between the two stabilizing sleeves (205).

3. A bolt fastener according to claim 2, wherein: The anti-slip structure includes an extrusion sheet (301), and multiple extrusion sheets (301) are provided and are fixedly arranged in a ring array on the outer bottom wall of the cylinder (202). The extrusion sheet (301) is an elastic deformable sheet.

4. A bolt fastener according to claim 2, wherein: The card (204) is a plastic deformation sheet.

5. A bolt fastener according to claim 1, wherein: The junction of the stud (101) and the prismatic screw head (102) has a tapered transition.

6. A bolt fastener according to claim 1, wherein: The top center of the prismatic screw head (102) is provided with a hexagonal hole (103).

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