CN217976992U

CN217976992U - Locking plate

Info

Publication number: CN217976992U
Application number: CN202222072892.9U
Authority: CN
Inventors: 魏显
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2022-12-06
Anticipated expiration: 2032-08-08

Abstract

The utility model discloses a locking plate, relate to anti-loosening structure technical field, locking plate is located between nut and the equipment, locking plate includes the annular locking plate body that sets up and follows the stopper that the radial direction of locking plate body set up, the contact surface of locking plate body and nut sets up to the smooth surface, reserve between stopper and the equipment and leave the interval, work as when stopper and locking plate body junction atress are buckled, the outer peripheral face of stopper and nut is closely laminated, just the contact surface of stopper and nut is the plane; the contact surface of the lock plate body and the equipment is set to be a tooth-shaped surface or a frosted surface. The utility model discloses a locking plate to improve the stability of nut pretightning force, effectively prevent loosing simultaneously.

Description

Locking plate

Technical Field

The utility model relates to a locking structure technical field especially relates to a locking plate.

Background

The bolt has become the most widely used connection mode at present because of its advantages such as large connection force, compact structure, convenient assembly and disassembly, reliable connection, etc. The pre-tightening force is the core of the bolt connection. Bolt looseness refers to the fact that partial or all pretightening force along the axis direction is lost when bolts are connected, and is an important form of bolt failure, although the thread friction force and the end face friction force of the bolts can achieve the self-locking condition, due to the reasons of environment, equipment friction and lubrication, personnel operation, vibration and the like, the pretightening force of the bolts cannot be guaranteed to be stable.

The existing anti-loosening technology mainly changes the thread friction coefficient of a bolt or the end surface friction coefficient of the bolt, thereby controlling the pretightening force coefficient of the bolt and achieving the anti-loosening purpose. There are three basic types of looseness prevention commonly used: mechanical looseness prevention; loosening prevention of the screw thread; novel locking.

The mechanical looseness prevention comprises split pin looseness prevention, serial steel wire looseness prevention, stop gasket looseness prevention and spring gasket looseness prevention, wherein the split pin looseness prevention cannot guarantee pretightening force, and the processing difficulty is high; the installation process of the series steel wire is strict, the steel wire can be transformed into plastic deformation in long-term elastic deformation, and the pretightening force cannot be ensured; the stop washer often rotates in the installation process, so that the nut cannot be effectively locked, and the requirement on the skill of a technician is high; the spring washer can not continuously provide effective anti-loosening effect due to insufficient elasticity.

The common thread anti-loosening measures comprise double-nut anti-loosening, self-locking nut anti-loosening and thread locking glue anti-loosening, a specially-made bolt must be selected before the double-nut anti-loosening measure is used, and otherwise, the length of the thread cannot be ensured. The self-locking nut increases the friction force of the thread, so that the pre-tightening force of the nut cannot be ensured when the bolt is fastened; the anti-loosening of the sealant is realized after the sealant is solidified, the bolt is disassembled with an excessive moment risk, and after the bolt is disassembled, the sealant needs to be cleaned and is required to be coated again.

The common novel anti-loosening device comprises a high-strength bolt self-locking anti-loosening device, a double-stack self-locking anti-loosening device and a wedge-shaped anti-loosening nut, and the high-strength bolt anti-loosening device is particularly sensitive to friction coefficient, is not suitable for conventional torque fastening and has large failure risk. The double-stacking self-locking anti-loosening changes the friction coefficient between the nut and the contact surface, changes the torque value for fastening the bolt, changes the stretching amount of the bolt and has the risk of clamping force failure; the wedge-shaped anti-loosening technology is high in requirement, large in processing difficulty and high in production cost, and meanwhile, the length of the bolt is changed, so that difficulty is increased for design and installation.

SUMMERY OF THE UTILITY MODEL

To above-mentioned mechanical locking, screw locking, novel locking not enough, the utility model discloses a locking plate to improve the stability of nut pretightning force, effectively carry out locking simultaneously.

In order to realize the purpose, the technical scheme of the invention is as follows:

a locking plate is positioned between a nut and equipment and comprises a locking plate body and a stop piece, wherein the locking plate body is arranged in an annular mode, the stop piece is arranged along the radial direction of the locking plate body, the contact surface of the locking plate body and the nut is a smooth surface, the thickness of the joint of the stop piece and the locking plate body is smaller than or equal to half of the thickness of the locking plate body, when the joint of the stop piece and the locking plate body is stressed and bent, the outer peripheral surfaces of the stop piece and the nut are tightly attached, and the contact surface of the stop piece and the nut is a plane; the contact surface of the lock plate body and the equipment is set to be a tooth-shaped surface or a frosted surface.

Furthermore, the tooth-shaped surface is provided with anti-skidding teeth which are uniformly distributed on the contact surface of the locking plate body and the equipment.

Furthermore, the anti-skid teeth are selected from any one of phoenix tail-shaped teeth, straight teeth, oblique teeth and fish scale teeth.

Furthermore, the anti-skidding teeth are phoenix tail-shaped teeth, the teeth of the phoenix tail-shaped teeth are obliquely arranged along the clockwise direction relative to the radial direction of the lock plate body, and the tooth surfaces of the phoenix tail-shaped teeth are arc-shaped.

Furthermore, the anti-skid teeth are straight teeth, and the tooth surfaces of the straight teeth are rectangular;

or the width of the teeth of the straight teeth is gradually increased from inside to outside along the radial direction of the lock plate body, and the tooth surfaces of the straight teeth are triangular at the moment.

Furthermore, the anti-skid teeth are selected from fish scale teeth, and tooth surfaces of the fish scale teeth are in a V shape.

Further, the stopper is a locking lug, and the locking lug is at least one.

Further, when the number of the locking lugs is three, the three locking lugs are all arranged on the same side of the central line of the nut.

Further, the stop piece is a ring ear, and the ring ear and the lock plate body are concentrically arranged.

The utility model discloses a locking plate's beneficial effect:

1. the locking plate adopts mechanical anti-loosening, after the nut is fastened according to the torque requirement, the stop piece is bent to be tightly attached to the nut and integrated with the nut, the tooth-shaped surface or the frosted surface can prevent the locking plate body from rotating in the process of screwing the nut, and when the nut and the locking plate body are locked, the tooth-shaped surface or the frosted surface prevents the nut and the locking plate body from loosening;

2. the locking plate disclosed in the application has the advantage of looseness prevention of the pretightening force and looseness prevention of machinery, good mechanical performance provides stable friction coefficient for the bolt assembly, the risk that the pretightening force of the bolt assembly is not enough is reduced, and the locking lug provides good looseness prevention measures for the bolt assembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of the connection relationship among the locking plate, the nut and the equipment disclosed by the utility model;

fig. 2 is a schematic structural view of a single-lug anti-loosening locking plate disclosed in embodiment 1 of the present invention;

fig. 3 is a top view of a monaural locking plate disclosed in embodiment 1 of the present invention;

fig. 4 is a structural schematic view of the locking plate disclosed in embodiment 1 of the present invention, in which the tooth surface is rectangular;

fig. 5 is a schematic structural view of a phoenix-tail-shaped tooth disclosed in embodiment 2 of the present invention;

fig. 6 is a schematic structural view of a fish scale tooth disclosed in embodiment 3 of the present invention;

fig. 7 is a schematic structural view of the helical teeth disclosed in embodiment 4 of the present invention;

fig. 8 is a schematic structural view of the anti-loosening locking plate disclosed in embodiment 5 of the present invention;

fig. 9 is a schematic structural view of a frosted surface disclosed in embodiment 5 of the present invention;

fig. 10 is a schematic structural view of a three-lug anti-loosening locking plate disclosed in embodiment 6 of the present invention;

fig. 11 is a schematic structural view of the ring-ear locking plate disclosed in embodiment 7 of the present invention.

In the figure: 1. the locking plate body; 11. a smooth surface; 12. a tooth-shaped surface; 13. sanding surface; 2. a stopper; 21. locking lugs; 22. looping ears; 3. a nut; 4. equipment; 5. anti-slip teeth; 51. straight teeth; 52. a phoenix tail-shaped tooth; 53. fish scale teeth; 54. and (4) oblique teeth.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying fig. 1 to 11 in the embodiments of the present invention, and it is obvious that the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

With reference to fig. 1 and 2, the locking plate comprises an annular locking plate body 1 and a retainer 2 extending along the radial direction of the locking plate body 1. The lock plate body 1 is horizontally arranged between the nut 3 and the equipment 4, and a space is reserved between the stop piece 2 and the equipment 4. The contact surfaces of the lock plate body 1 and the nut 3 are smooth surfaces 11, and support can be provided in the moment fastening process of the nut 3.

With reference to fig. 1 and 2, the contact surface between the lock plate body 1 and the device 4 is set as a tooth surface 12, and due to the tooth surface 12, the thickness of the lock plate body 1 is thicker than that of a conventional lock plate, so that the lock plate has stronger impact resistance, and the lock plate body 1 cannot be damaged in the fastening process.

With reference to fig. 2, 3 and 4, the toothed surface 12 is provided with a plurality of anti-slip teeth 5, and the plurality of anti-slip teeth 5 are uniformly distributed on the contact surface of the locking plate body 1 and the device 4. The anti-slip teeth 5 are straight teeth 51, the tooth surfaces of the straight teeth 51 can be rectangular or triangular, the embodiment takes a triangular tooth surface as an example, the width of the teeth of the straight teeth 51 is gradually increased from inside to outside along the radial direction of the lock plate body 1, and the extension lines of the central lines of the teeth of the straight teeth 51 intersect at a point, which is the center of the lock plate body 1.

With reference to fig. 1 and 3, the stop member 2 is the lock lug 21, the lock lug 21 is at least one, the number of the lock lugs 21 is not limited in the present application, in the present embodiment, a single lock lug 21 is taken as an example, the lock lug 21 is rectangular, the lock lug 21 adopts a rectangular locking plate surface design, a certain gap is formed between the lock lug 21 and the device 4, the lock lug 21 is conveniently bent after the bolt is fastened, and the bent lock lug can completely attach to the plane of the nut 3. The connecting part of the lock lug 21 and the lock plate body 1 is arc-shaped, the lock lug 21 and the lock plate body 1 are integrally formed, and the thickness of the lock lug 21 is equal to one half of the thickness of the lock plate body 1, so that an interval is formed between the lock lug 21 and the device 4. After the nut 3 is fastened according to the torque requirement, the lock lug 21 is stressed to bend and deform at the joint of the retainer 2 and the lock plate body 1, and the contact surfaces of the lock lug 21 and the nut 3 are planes, so that the outer peripheral surfaces of the lock lug 21 and the nut 3 are tightly attached, and the lock lug 21 and the nut 3 can be mutually locked to form a whole.

Example 2

The difference from embodiment 1 is that, referring to fig. 5, the anti-slip tooth 5 is a phoenix tail-shaped tooth 52, the tooth surface of the phoenix tail-shaped tooth 52 is arc-shaped, the tooth of the phoenix tail-shaped tooth 52 is inclined clockwise relative to the radial direction of the lock plate body 1, and the extension lines of the phoenix tail-shaped teeth 52 intersect at a point, which is the center of the lock plate body 1.

Example 3

The difference from the embodiment 1 is that, referring to fig. 6, the anti-slip teeth 5 are fish scale teeth 53, the tooth surfaces of the fish scale teeth 53 are V-shaped, the open ends of a plurality of fish scale teeth 53 face in the same direction, and the open ends of the fish scale teeth 53 face in the same direction as the screwing direction of the nut 3.

Example 4

The difference from embodiment 1 is that, referring to fig. 7, the anti-slip tooth 5 is a slanted tooth 54 whose tooth tip length corresponding to the tooth root direction gradually increases in the radial direction.

Example 5

The difference from the embodiment 1 is that, in combination with fig. 8 and fig. 9, the contact surface of the lock plate body 1 and the equipment 4 is provided with a frosted surface 13, and the frosted surface 13 can prevent the lock plate body 1 from rotating during the tightening process of the nut 3; when the nut 3 and the lock plate body 1 are locked, the frosted surface 13 prevents the nut 3 and the equipment 4 from loosening.

Example 6

The difference from the embodiment 1 is that, referring to fig. 10, three locking lugs 21 are provided, the three locking lugs 21 are all disposed on the same side of the center line of the nut 3, the extension lines of the center lines of the three locking lugs 21 intersect at a point, the point is the circle center of the lock plate body 1, and the three-lug design has low requirements on the installation skill level and is convenient to operate.

Example 7

The difference from the embodiment 1 is that, referring to fig. 11, the stop element 2 is a ring lug 22, the ring lug 22 and the lock plate body 1 are concentrically arranged, the ring lug 22 is made of metal with certain ductility, so that the ring lug 22 can be integrally bent, and the nut 3 is wrapped by the ring lug 22, so that the locking effect of the stop element 2 on the nut 3 is increased. The design of the ring ears 22 has low requirements on the installation skill level and is convenient to operate.

The implementation principle of the application is as follows: before working, the nut 3, the bolt and the locking plate are cleaned and lubricated; then the lock plate body 1 is placed between the nut 3 and the equipment 4, the nut 3 is screwed manually, and the arrangement of the tooth-shaped surface 12 or the frosted surface 13 can prevent the lock plate body 1 from rotating relative to the equipment 4; and then fastening the bolt according to the bolt fastening technical requirement, and after the bolt fastening is finished, bending the stop piece 2 to lock the nut 3.

In the process of screwing up nut 3, the setting of profile of tooth 12 or frosting 13 can prevent locking plate body 1 rotatory for equipment 4, improve locking plate body 1's stability, require to accomplish the fastening back at nut 3 according to moment, 2 crooked and 3 inseparable laminatings of stopper, stopper 2 and nut 3 can lock each other this moment, and simultaneously, profile of tooth 12 or frosting 13 prevent that nut 3 and locking plate body 1 are not hard up, under the locking and mechanical locking's dual function of pretightning force, good mechanical properties provides stable friction coefficient for bolt assembly, the not enough risk of bolt assembly pretightning force has been reduced. Meanwhile, the inner diameter, the outer diameter and the friction coefficient of the locking plate body 1 are consistent with the national standard requirements, the fastening coefficient of the bolt assembly is not changed, and the specification and the fastening torque value of the bolt do not need to be changed when a designer calculates and selects the type.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a locking plate, is located between nut (3) and equipment (4), its characterized in that, including locking plate body (1) that the annular set up and along retainer (2) that locking plate body (1) radial direction set up, the contact surface of locking plate body (1) and nut (3) sets up to smooth surface (11), it has the interval to reserve between retainer (2) and the equipment (4), when retainer (2) and locking plate body (1) junction atress are buckled, the outer peripheral face of retainer (2) and nut (3) is closely laminated, and the contact surface of retainer (2) and nut (3) is the plane; the contact surface of the lock plate body (1) and the equipment (4) is set to be a tooth-shaped surface (12) or a frosted surface (13).

2. An anti-loose locking plate according to claim 1, characterized in that the toothed surface (12) is provided with anti-slip teeth (5), and the anti-slip teeth (5) are uniformly distributed on the contact surface of the locking plate body (1) and the equipment (4).

3. An anti-loose locking plate according to claim 2, characterized in that said anti-slip teeth (5) are selected from any one of phoenix tail shaped teeth (52), straight shaped teeth (51), oblique shaped teeth (54), fish scale teeth (53).

4. A lock plate according to claim 3, characterized in that the anti-slip teeth (5) are phoenix tail-shaped teeth (52), the teeth of the phoenix tail-shaped teeth (52) are inclined clockwise relative to the radial direction of the lock plate body (1), and the tooth surfaces of the phoenix tail-shaped teeth (52) are arc-shaped.

5. An anti-loosening locking plate according to claim 3, characterized in that the anti-slip teeth (5) are straight teeth (51), the tooth surfaces of the straight teeth (51) being rectangular;

or the width of the teeth of the straight teeth (51) is gradually increased from inside to outside along the radial direction of the lock plate body (1), and the tooth surfaces of the straight teeth (51) are triangular.

6. An anti-loose locking plate according to claim 3, characterized in that said anti-slip teeth (5) are selected from the group of fish scale teeth (53), the flanks of said fish scale teeth (53) being V-shaped.

7. A locking plate according to claim 1, characterized in that said stop (2) is a locking lug (21), said locking lug (21) being at least one.

8. A locking plate according to claim 7, characterized in that the number of said locking lugs (21) is three, and when the number of said locking lugs (21) is three, all three of said locking lugs (21) are disposed on the same side of the central line of the nut (3).

9. An anti-loose lock plate according to claim 1, characterized in that the retainer (2) is a loop (22), the loop (22) being concentrically arranged with the lock plate body (1).