CN214837682U

CN214837682U - Self-locking bolt for vehicle

Info

Publication number: CN214837682U
Application number: CN202120904214.7U
Authority: CN
Inventors: 赵秀东; 赵培源
Original assignee: Czzt Motorkits Co ltd
Current assignee: Czzt Motorkits Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-23
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a self-locking bolt for automobile, aiming at providing a self-locking bolt with strong anti-vibration and good fastening effect for automobile, which has the key points of the technical proposal that the self-locking bolt for automobile comprises a shaft body and a head part, wherein the shaft body is provided with screw threads, and the shaft body is provided with self-locking screw threads; the self-locking thread comprises a triangular thread tooth, the vertex angle of the triangular thread tooth is a right angle, and the base angle of the triangular thread tooth towards the end of the shaft body is smaller than the base angle of the triangular thread tooth towards the end of the head part; when the self-locking bolt is screwed, the smaller bottom angle of the triangular thread faces the end of the shaft body, so that the self-locking bolt is beneficial to being more labor-saving to attack into the hole and easy to install; at the moment, the thread tooth point rotates along with the bolt, a thread type self-locking line is formed in the hole, and the bearing capacity of a thread surface is strong; the arrangement of the thread ridge towards the bottom corner of the head enables the bolt to provide greater resistance when being pulled out under axial force, so that the bolt has better fastening effect. The utility model is suitable for an automobile spare and accessory part field.

Description

Self-locking bolt for vehicle

Technical Field

The utility model belongs to the automobile spare and accessory part field refers in particular to an automobile-used self-locking bolt.

Background

The self-locking bolt is a bolt with fastening effect which is mainly used in industries such as automobiles, trains, ships, aviation and the like which need to deal with vibration problems. Because in the vehicle driving process, a plurality of bolts are in the state of constantly receiving vibration and rushing, the situation that the friction force disappears under a certain instantaneous condition to cause the bolt to loosen, retreat and the like can occur, and huge potential safety hazards exist, so that the safety is ensured by the bolts with the locking effect. The existing self-locking bolt often has the problems of poor fastening effect, incapability of reinstalling due to deformation of a fastening piece after disassembly or incapability of playing the fastening effect after reinstallation.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a strong auto-lock bolt that imitates anti-vibration, fastening are effectual for car.

In order to achieve the above purpose, the utility model provides a following technical scheme: a self-locking bolt for a vehicle comprises a shaft body and a head part, wherein the shaft body is provided with threads, and the shaft body is provided with self-locking threads; the self-locking thread comprises a triangular thread tooth, the vertex angle of the triangular thread tooth is a right angle, and the base angle of the triangular thread tooth towards the end of the shaft body is smaller than the base angle of the triangular thread tooth towards one end of the head.

The utility model discloses further set up to: the part of the head connected with the shaft body is provided with a ring groove around the shaft body, the periphery of the bottom of the shaft body is provided with a check washer, and the center of the side, which is attached to the head, of the check washer is provided with a ring of convex rings matched with the ring groove.

The utility model discloses further set up to: the anti-loosening gasket comprises a first gasket and a second gasket which are coaxially arranged, and the first gasket is provided with a convex ring.

The utility model discloses further set up to: the two sides of the first gasket and the second gasket are respectively provided with a first sawtooth surface and a second sawtooth surface, the first sawtooth surface of the first gasket is attached to the head, and the second sawtooth surfaces of the two gaskets are relatively meshed.

The utility model discloses further set up to: the head part is provided with sawteeth matched with the first sawteeth surface on the surface of the ring groove.

By adopting the technical scheme, when the self-locking bolt is screwed, the smaller bottom angle of the triangular thread faces the end of the shaft body, so that the self-locking bolt is more labor-saving, easier to tap into the hole and easy to install; at the moment, the thread cusp rotates along with the bolt to form a thread type self-locking line in the hole, the right-angled thread cusp has both strength and tapping capacity, and the bearing capacity of a thread surface is strong; the arrangement of the thread ridge towards the bottom corner of the head enables the bolt to provide greater resistance when being pulled out under axial force, so that the bolt has better fastening effect.

The setting of through lock washer multiplicable pretightning force further strengthens the locking effect of bolt, plays location and connection, simple to operate convenience to lock washer through the cooperation of bulge loop and annular.

The anti-loosening gasket is a combined gasket of the first gasket and the second gasket, and further strengthens the effect of buffering and loosening prevention.

The first washer and the second washer have the same structure except for the convex ring, so that the second sawtooth surfaces of the two washers are opposite, the second sawtooth surfaces are opposite in rotation direction and are meshed with each other, on one hand, the contact area is increased, the mutual interference is avoided, the bolt is prevented from being loosened by rotating around a shaft, and on the other hand, the two anti-loosening washers are simple in installation and operation and can keep anti-loosening effect after being repeatedly installed and used for many times.

The head is connected with the first sawtooth surface in a clamping mode without using an adhesive, the service life is longer, the adhesive is not prone to deterioration and failure in severe environments such as moist and the like, and the stability is good.

Drawings

Fig. 1 is a schematic view of the main body of the present invention;

FIG. 2 is an enlarged schematic view of a triangular thread ridge;

fig. 3 is a left side view of the present invention;

FIG. 4 is a schematic view at A-A in FIG. 1;

FIG. 5 is a schematic view of a lock washer;

FIG. 6 is a schematic view at I of FIG. 1;

in the drawings: 1. a shaft body; 2. a head portion; 3. self-locking threads; 4. a ring groove; 5. a convex ring; 6. a first gasket; 7. a second gasket; 8. a first serrated surface; 9. a second serrated surface; 10. and a third serrated surface.

Detailed Description

The invention is further described in the following with reference to fig. 1 to 6 in specific embodiments: a self-locking bolt for a vehicle comprises a shaft body 1 and a head part 2, wherein the shaft body 1 is provided with threads, and the shaft body 1 is provided with self-locking threads 3; self-locking thread 3 includes triangle thread ridge, and triangle thread ridge apex angle is the right angle, and triangle thread ridge is less towards the base angle of 2 one ends of head than triangle thread ridge towards the base angle of axis body 1 end.

According to the structure, when the self-locking bolt is screwed, the smaller bottom angle of the triangular thread tooth faces to the shaft body 1 end, so that the self-locking bolt is more labor-saving, easier to attack into a hole and easy to install; at the moment, the thread cusp rotates along with the bolt to form a thread type self-locking line in the hole, the right-angled thread cusp has both strength and tapping capacity, and the bearing capacity of a thread surface is strong; the arrangement of the thread ridge towards the bottom angle of the head 2 enables the bolt to provide greater resistance to being pulled out under axial force, and therefore the bolt has a better fastening effect.

As an optional implementation mode, a circle of annular groove 4 is formed in the position, connected with the shaft body 1, of the head part 2 and is wound around the shaft body 1, a locking washer is arranged on the periphery of the bottom of the shaft body 1, and a circle of convex ring 5 matched with the annular groove 4 is arranged in the center of the side, attached to the head part 2, of the locking washer.

By the structure, the anti-loosening effect of the bolt is further enhanced by the aid of the increasing pretightening force of the anti-loosening gasket, the anti-loosening gasket is positioned and connected through the matching of the convex ring 5 and the annular groove 4, and the anti-loosening gasket is simple and convenient to install.

As an alternative embodiment, the lock washer includes a first washer 6 and a second washer 7 which are coaxially arranged, and the first washer 6 is provided with the convex ring 5.

The structure shows that the anti-loosening gasket is a combined gasket of the first gasket 6 and the second gasket 7, and the effect of buffering and loosening prevention is further enhanced.

As an alternative embodiment, both surfaces of the first gasket 6 and the second gasket 7 are provided with a first serrated surface 8 and a second serrated surface 9, the first serrated surface 8 of the first gasket 6 is attached to the head 2, and the second serrated surfaces 9 of the two gaskets are relatively bitten.

It can be seen from the above structure that the first washer 6 and the second washer 7 have the same structure except the convex ring 5, so that the second serrated surfaces 9 of the two washers are opposite, and the second serrated surfaces 9 are opposite in rotation direction and mutually meshed and connected, so that on one hand, the contact area is increased, the two washers are mutually butted to avoid axial rotation to loosen a bolt, and on the other hand, the two anti-loose washers are simple in installation and operation and can keep anti-loose effect after being repeatedly installed and used for many times.

As an alternative embodiment, the head 2 is provided with a third serrated surface 10 cooperating with the first serrated surface 8 on the face of the ring groove 4.

According to the structure, the head part 2 is connected with the first sawtooth surface 8 in a clamping mode without using an adhesive, the service life is longer, the adhesive is not prone to deterioration and failure in severe environments such as moist and the like, and the stability is good.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an automobile-used auto-lock bolt, includes axis body (1) and head (2), is equipped with the screw thread on axis body (1), its characterized in that: the shaft body (1) is provided with a self-locking thread (3); the self-locking thread (3) comprises a triangular thread tooth, the vertex angle of the triangular thread tooth is a right angle, and the angle of the base angle of the end, far away from the head (2), of the triangular thread tooth is smaller than that of the base angle of the end, facing to the head (2), of the triangular thread tooth.

2. The self-locking bolt for the vehicle according to claim 1, wherein: the connecting part of the head part (2) and the shaft body (1) is provided with a circle of annular grooves (4), the connecting part of the shaft body (1) and the head part (2) is provided with a check washer, and the check washer is provided with a circle of convex rings (5) matched with the annular grooves (4) towards the center of one side of the head part (2).

3. The self-locking bolt for the vehicle according to claim 2, wherein: the anti-loosening gasket comprises a first gasket (6) and a second gasket (7) which are coaxially arranged.

4. The self-locking bolt for the vehicle according to claim 3, wherein: and a first serrated surface (8) and a second serrated surface (9) are arranged on both sides of the first gasket (6) and the second gasket (7).

5. The self-locking bolt for the vehicle according to claim 4, wherein: the head (2) is provided with a third sawtooth surface (10) matched with the first sawtooth surface (8) on the surface of the ring groove (4).