CN213684912U

CN213684912U - Anti-loosening locking pad and fastener

Info

Publication number: CN213684912U
Application number: CN202022586926.7U
Authority: CN
Inventors: 杨滨; 王洋; 董金国; 王定岩; 于金飞; 何彭飞; 褚淑敏
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely New Energy Commercial Vehicle Group Co Ltd; Geely Sichuan Commercial Vehicle Co Ltd; Jiangxi Geely New Energy Commercial Vehicle Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely New Energy Commercial Vehicle Group Co Ltd; Geely Sichuan Commercial Vehicle Co Ltd; Jiangxi Geely New Energy Commercial Vehicle Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-07-13
Anticipated expiration: 2030-11-10

Abstract

The utility model provides a locking pad and fastener belongs to fastener technical field. It has solved the not good scheduling technical problem of current spring washer to the locking effect of bolt. This locking pad, including being used for the cover to establish the outer lane on the bolt, the outer lane has elasticity, have the breach on the outer lane, its characterized in that, be equipped with on the inner wall of outer lane can the joint at the interior tooth on the bolt screw thread, interior tooth leans on with the tooth surface counterbalance of bolt screw thread. The utility model discloses exerted radial force and axial force to the bolt, when the bolt received vibrations, this locking pad also can keep not hard up, and then prevents that the nut is not hard up to drop.

Description

Anti-loosening locking pad and fastener

Technical Field

The utility model belongs to the technical field of the fastener, concretely relates to locking pad and fastener.

Background

The connection and fixation of mechanical equipment are various, and the connection and fixation by bolts is one of the connection and fixation. In order to ensure that equipment is well connected, the structure of a fixed bolt is different, in order to prevent the bolt from loosening, the existing double-nut anti-loosening device, the slotted nut and the split pin anti-loosening device, the spring pad anti-loosening device, the self-locking nut anti-loosening device and the like are not ideal in practical application, particularly, mechanical equipment with severe vibration is obvious, and the main reason is that once the bolt connection in the equipment is loosened, the bolt can fall off to cause great potential safety hazard, or the loosening pre-tightening force of the bolt is reduced to cause the fatigue life of the bolt connection to be greatly shortened.

The locking principle of present spring washer is to install the bullet pad between nut and connecting piece, and after the nut flattened spring washer, spring washer can produce a axial elasticity that lasts, makes the threaded connection of nut and bolt vice continuously keep a frictional force production moment of resistance, prevents that the nut from becoming flexible. Meanwhile, sharp corners at the opening of the spring washer are embedded into the surfaces of the bolt and the connected piece respectively, so that the bolt is prevented from rotating relative to the connected piece.

However, in practical tests, the surfaces of the bolt and the connected piece are not provided with obvious embedding marks, the elastic force provided by the elastic pad is limited, and the pretightening force can disappear at a certain moment and the connection can be loosened under the actions of impact, vibration and variable load. Therefore, the spring washer has poor locking effect on the bolt.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a locking pad and fastener, the utility model aims to solve the technical problem that: how to make the fastener receive when shaking, locking pad also can not produce not hard up.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a locking pad, establishes the outer lane on the bolt including being used for the cover, the outer lane has elasticity, have the breach on the outer lane, its characterized in that, be equipped with on the inner wall of outer lane can the joint in the tooth on the bolt screw thread, interior tooth can lean on with the tooth surface counterbalance of bolt screw thread.

According to the specification of different bolts, this locking pad also can have different specification and dimension, assemble locking pad to the bolt, the internal diameter size of tooth is less than bolt tooth base diameter size in the selection, the tooth selects according to bolt screw's profile of tooth in the locking pad simultaneously, prop locking pad open through the breach at the in-process of assembly, then, in the screw thread of tooth embedding bolt in will, interior tooth is leaned on with bolt screw's flank counterbalance, the screw thread inlays establishes the completion back, along with the power that props open on the outer lane disappears in effect, have elastic outer lane with interior tooth joint on bolt screw, and exert radial force to the bolt, make interior tooth and bolt screw in close contact with in order to realize sufficient radial elasticity and frictional force, even the bolt is when receiving vibrations, locking pad also can not produce not hard up.

In the anti-loose locking pad, the top surface and the bottom surface of the outer ring are both planar and parallel to each other. This locking pad is smooth annular when not assembling, when locking pad assembles the bolt, because the screw thread has the helix, in the screw thread that interior tooth needs embedding bolt, make originally smooth outer lane also take place to twist reverse, make locking pad after the assembly have the axial force of exerting on the bolt, so far, this locking pad is used in the power on the bolt including axial force and radial power, make interior tooth and bolt screw thread in close contact with in order to realize sufficient radial elasticity and frictional force, even the bolt is when receiving vibrations, locking pad also can not produce not hard up.

In the anti-loose locking pad, two sections of inner teeth which are arranged at intervals are arranged on the outer ring, wherein one end of one section of inner teeth, which is arranged on the outer ring and is provided with the notch, is arranged clockwise, and the other end of the other section of inner teeth, which is arranged on the outer ring and is provided with the notch, is arranged anticlockwise. The inner teeth of the two sections on the inner wall of the outer ring are arranged at intervals, so that the strength of one section without the inner ring on the outer ring is relatively reduced, the local elasticity is increased, the force of the anti-loosening locking pad acting on the bolt comprises axial force and radial force, the inner teeth are in close contact with the thread of the bolt to realize sufficient radial elasticity and friction force, and the anti-loosening locking pad cannot be loosened even if the bolt is vibrated.

In the anti-loosening locking pad, the outer ring is provided with two mounting holes which are respectively positioned at two sides of the notch. The tool penetrates into the mounting hole, so that the anti-loosening locking pad is conveniently spread.

The utility model provides a fastener, includes bolt, nut and locking pad, and locking pad is including having elastic outer lane, the breach has on the outer lane, its characterized in that, be equipped with the interior tooth of joint on the bolt screw on the inner wall of outer lane, the tooth face of interior tooth and bolt screw offsets and leans on, nut and locking pad cooperate with the bolt in proper order, the nut is located between locking pad and the bolt head.

According to the specifications of different bolts, the anti-loose locking pad can also have different specification sizes, the nut and the anti-loose locking pad are sequentially matched with the bolt, the nut is positioned between the anti-loose locking pad and the bolt head, the anti-loose locking pad is assembled on the bolt, the inner diameter size of the inner teeth is selected to be smaller than the diameter size of the bolt tooth bottom, meanwhile, the inner teeth of the locking pad are selected according to the tooth form of the bolt thread, the anti-loose locking pad is propped open through a gap in the assembling process, then, the inner teeth are embedded into the thread of the bolt, the inner teeth are propped against the tooth surface of the bolt thread, if the best effect of preventing the nut from loosening is achieved, the anti-loose locking pad is propped against the rear end of the bolt, after the thread embedding is completed, along with the disappearance of the propping open force acting on the outer ring, the outer ring with elasticity clamps the inner teeth on the bolt thread, and exerts radial force on the bolt, the inner teeth are, even if the bolt is vibrated, the anti-loosening locking pad cannot be loosened, and the nut cannot fall off.

In the fastener, the top surface and the bottom surface of the outer ring are both planes and are parallel to each other. Locking pad is smooth annular when not assembling, when locking pad assembles on the bolt, because the screw thread has the helix, in the screw thread that interior tooth needs embedding bolt, make originally smooth outer lane also take place to twist reverse, make locking pad after the assembly have the axial force of exerting on the bolt, so far, this locking pad is used in the power on the bolt including axial force and radial power, make interior tooth and bolt screw thread in close contact with in order to realize sufficient radial elasticity and frictional force, even the bolt is when receiving vibrations, locking pad also can not produce not hard up.

In the fastener, two sections of inner teeth which are arranged at intervals are arranged on the outer ring, wherein one end of one section of inner teeth, which is arranged on the upper gap of the outer ring, is arranged clockwise, and the other end of the other section of inner teeth, which is arranged on the upper gap of the outer ring, is arranged counterclockwise. The inner teeth of the two sections on the inner wall of the outer ring are arranged at intervals, so that the strength of one section without the inner ring on the outer ring is relatively reduced, the local elasticity is increased, the force of the anti-loosening locking pad acting on the bolt comprises axial force and radial force, the inner teeth are in close contact with the bolt thread to realize sufficient radial elasticity and friction force, and the anti-loosening locking pad cannot be loosened even if the bolt is vibrated.

Compared with the prior art, the utility model has the advantages of it is following:

1. this locking pad can be used to the power on the bolt including radial and axial power, makes interior tooth and bolt screw thread in close contact with in order to realize sufficient radial elasticity and frictional force, even the bolt is receiving when vibrations, locking pad also can not produce not hard up.

2. In the fastener, locking pad sets up the rear with the nut, and locking pad itself can not take place not hard up when the bolt vibrations, just also can prevent that the nut from deviating from the bolt.

Drawings

FIG. 1 is a top view of the present anti-loose locking pad.

FIG. 2 is a cross-sectional view A-A of the present anti-loose locking pad.

Fig. 3 is a schematic view of the assembled fastener.

Fig. 4 is a cross-sectional view of the fastener after assembly.

In the figure, 1, an anti-loose locking pad; 1a, an outer ring; 1b, inner teeth; 1c, a gap; 1d, mounting holes; 2. a bolt; 3. and a nut.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, the anti-loose locking pad 1 comprises an outer ring 1a, wherein the outer ring 1a is made of Q235A or 45 steel, so that the outer ring 1a has resetting elasticity under the condition of slight distortion, a notch 1c is arranged on the outer ring 1a, inner teeth 1b capable of being clamped on the threads of the bolt 2 are arranged on the inner wall of the outer ring 1a, and the inner teeth 1b are abutted against the tooth surfaces of the threads of the bolt 2.

As shown in fig. 1 to 4, outer lane 1a top surface and bottom surface are the plane and are parallel to each other, and this locking pad 1 is smooth annular when not assembling, and interior tooth 1b does not have the peculiarity of spiral yet, is equipped with two mounting holes 1d on outer lane 1a, mounting hole 1d is located the both sides of breach 1c respectively, penetrates the mounting hole 1d with the instrument in, is convenient for strut locking pad 1 when the assembly.

As shown in fig. 1 to 4, according to the specifications of different bolts 2, the anti-loose locking pad 1 may also have different specifications and sizes, the anti-loose locking pad 1 is assembled on the bolt 2, the inner diameter size of the inner thread 1b is selected to be smaller than the diameter size of the thread bottom of the bolt 2, the inner thread 1b of the locking pad is selected according to the thread shape of the bolt 2, a tool is inserted into the mounting hole 1d, the anti-loose locking pad 1 is opened through the notch 1c, when the anti-loose locking pad 1 is assembled on the bolt 2, the inner thread 1b needs to be embedded into the thread of the bolt 2 due to the spiral thread having the spiral line, so that the originally flat outer ring 1a is also twisted, the assembled anti-loose locking pad 1 has the axial force applied on the bolt 2, and thus far, the force of the anti-loose locking pad 1 applied on the bolt 2 includes the axial force and the radial force, so that the inner thread 1b is in close contact with the thread of the bolt 2 to, even if the bolt 2 is vibrated, the anti-loose locking pad 1 can not be loosened.

Specifically, as shown in fig. 1 to 4, the inner teeth 1b are arranged in two sections, a gap is formed between the two sections of inner teeth 1b, one end of one section of the inner teeth 1b, which is started from the notch 1c on the outer ring 1a, is arranged clockwise, the other end of the other section of the inner teeth 1b, which is started from the notch 1c on the outer ring 1a, is arranged counterclockwise, and the gap between the two sections of the inner teeth 1b is opposite to the notch 1c, so that the strength of the section, which is not provided with the inner ring, on the outer ring 1a is relatively reduced, the local elasticity is increased, and the assembly is facilitated.

As shown in fig. 1 to 4, in the locking and fastening piece 1, the locking and fastening piece comprises a bolt 2, a nut 3 and a locking and fastening pad 1, the nut 3 and the locking and fastening pad 1 are sequentially matched with the bolt 2, and the nut 3 is located between the locking and fastening pad 1 and the head of the bolt 2.

As shown in fig. 1 to 4, a nut 3 and an anti-loose locking pad 1 are sequentially matched with a bolt 2, the nut 3 is positioned between the anti-loose locking pad 1 and the head of the bolt 2, the anti-loose locking pad 1 is assembled on the bolt 2, the inner diameter of an inner thread 1b is selected to be smaller than the diameter of the bottom of the bolt 2, the inner thread 1b of the locking pad is selected according to the thread profile of the bolt 2, the anti-loose locking pad 1 is propped open by a gap 1c in the assembling process, then the inner thread 1b is embedded into the thread of the bolt 2, the inner thread 1b is propped against the thread surface of the thread of the bolt 2, if the best effect of preventing the nut 3 from loosening is achieved, the anti-loose locking pad 1 is propped against the rear end of the bolt 2, after the thread is embedded, along with the force of the propping open on an outer ring 1a disappears, the outer ring 1a with elasticity clamps the inner thread 1b on the thread of the bolt 2, and, the inner teeth 1b are in close contact with the threads of the bolt 2 to achieve sufficient radial elasticity and friction force, and even if the bolt 2 is vibrated, the anti-loosening locking pad 1 cannot be loosened and the nut 3 cannot fall off.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms anti-loose locking pad, outer ring and inner teeth are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a locking pad, establishes outer lane (1a) on bolt (2) including being used for the cover, outer lane (1a) has elasticity, breach (1c) have on outer lane (1a), its characterized in that, be equipped with on the inner wall of outer lane (1a) can joint tooth (1b) in on bolt (2) screw thread, interior tooth (1b) can lean on with the tooth face counterbalance of bolt (2) screw thread.

2. The anti-loose locking pad according to claim 1, characterized in that the top surface and the bottom surface of the outer ring (1a) are both planar and parallel to each other.

3. The anti-loose locking pad according to claim 1 or 2, characterized in that two sections of internal teeth (1b) are arranged on the outer ring (1a) at intervals, wherein one section of internal teeth (1b) is arranged clockwise from one end of the notch (1c) on the outer ring (1a), and the other section of internal teeth (1b) is arranged counterclockwise from the other end of the notch (1c) on the outer ring (1 a).

4. The anti-loose locking pad according to claim 1 or 2, characterized in that the outer ring (1a) is provided with two mounting holes (1d), and the mounting holes (1d) are respectively located at two sides of the notch (1 c).

5. The utility model provides a fastener, includes bolt (2), nut (3) and locking pad (1), locking pad (1) is including having elastic outer lane (1a), breach (1c) have on outer lane (1a), its characterized in that, be equipped with interior tooth (1b) of joint on bolt (2) screw thread on the inner wall of outer lane (1a), interior tooth (1b) offsets with the flank of bolt (2) screw thread and leans on, nut (3) and locking pad (1) cooperate with bolt (2) in proper order, nut (3) are located between locking pad (1) and bolt (2) head.

6. Fastener according to claim 5, characterized in that the top and bottom faces of the collar (1a) are planar and parallel to each other.

7. The fastener according to claim 5 or 6, characterized in that two sections of internal teeth (1b) are arranged on the outer ring (1a) at intervals, wherein one section of internal teeth (1b) is arranged clockwise from one end of the notch (1c) on the outer ring (1a), and the other section of internal teeth (1b) is arranged counterclockwise from the other end of the notch (1c) on the outer ring (1 a).