CN216812476U

CN216812476U - Screw locking device

Info

Publication number: CN216812476U
Application number: CN202220440643.8U
Authority: CN
Inventors: 邱永宁; 王强强; 刘飞飞; 袁飞
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-06-24
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses a screw anti-loosening device. The screw anti-loosening device is used for fastening and loosening a first connecting block and a second connecting block and comprises a stop gasket and a locking cover assembly, wherein the stop gasket is sleeved on a screw rod of a screw, the locking cover assembly is arranged on a screw head part of the screw, and the stop gasket is connected with the locking cover assembly in a matched mode to realize loosening prevention of the screw. The utility model has simple structure, reasonable design and simple and convenient operation, and has the following advantages: (1) the locking cover assembly is clamped into the inner hexagonal counter bore of the inner hexagonal screw and then clamped with the stop washer to form a restraining force on the screw and prevent the screw from rotating in the loosening direction; (2) the anti-loosening screw connection device has the advantages that the anti-loosening screw connection device is anti-loosening, not only is the installation mode simple and convenient, and is easy to operate, but also the anti-loosening effect is obvious, the connection is reliable, the risk of separation is avoided even the screw is used for a long time, meanwhile, the application occasion is wide, and the anti-loosening screw connection device is suitable for all hexagon socket head screws; (3) the assembly and disassembly are convenient, the interchangeability is high, and the reuse can be realized.

Description

Screw locking device

Technical Field

The utility model relates to the technical field of anti-loosening screws, in particular to a screw anti-loosening device.

Background

In the present society, engineering machinery equipment is widely applied to various industries, and screw connection is an indispensable connection mode in various industries, so that the application is wide, the application amount is also the industries and the huge number thereof, and the main modes for preventing the screw connection from loosening are as follows: the bolt is added with pretightening force, a spring gasket, anti-loosening glue and other modes, however, the modes can only maintain that the bolt cannot be loosened for a period of time, and the anti-loosening measures still lose efficacy in the long-time working process of the bolt; the damage of screw loosening caused by failure is quite large, the working state of a machine is influenced if the damage is slight, and engineering accidents can be caused if the damage is serious, so that the problem that the screw loosening has great influence on the whole engineering machinery industry is solved by designing a mode.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: overcomes the defects in the prior art and provides a screw anti-loosening device.

The technical scheme adopted by the utility model for solving the technical problem is as follows: the utility model provides a screw locking device for fastening, locking of first connecting block and second connecting block, includes lock washer and locking lid subassembly, and the lock washer cover is established on the screw rod of screw, and locking lid subassembly is installed on the head of screw, and lock washer and locking lid subassembly cooperation are connected for realize that the screw is locking.

Furthermore, the locking cover assembly comprises a locking cover, the locking cover comprises a cover plate main body, a central shaft is arranged in the center of the cover plate main body, the front end of the central shaft is a threaded section, a plurality of connecting parts are uniformly arranged on the edge of the cover plate main body, and clamping jaws are arranged at the tail ends of the connecting parts;

the center of the upper gear disc is provided with a first mounting hole;

the lower gear disc is provided with a second mounting hole in the center and comprises an outer hexagonal shaft and a tooth part which are connected, and the outer hexagonal shaft is inserted into the inner hexagonal counter bore of the screw head part;

and after the central shaft sequentially penetrates through the first mounting hole of the upper gear disc and the second mounting hole of the lower gear disc, the threaded section is in threaded connection with a fastening nut.

Furthermore, a spring is arranged between the upper gear disc and the lower gear disc and sleeved outside the central shaft.

Further, the locking gasket has cyclic annular gasket main part, and gasket main part edge evenly distributed has the ear groove, ear groove and jack catch cooperation joint.

Furthermore, the gasket main body is also provided with a protrusion, and the ear groove and the protrusion are respectively positioned on the front surface and the back surface of the gasket main body.

Furthermore, the cover plate main body is also provided with a locking lug which is positioned at the connecting part of the cover plate main body and the central shaft; the upper gear plate is provided with a locking clamping groove, and the locking lug is clamped into the locking clamping groove.

The utility model has the beneficial effects that: the utility model has simple structure, reasonable design and simple and convenient operation, and has the following advantages:

(1) the locking cover assembly is clamped into the hexagon socket countersink of the hexagon socket head cap screw and then is clamped with the stop gasket to form a restraining force on the screw and prevent the screw from rotating towards the loosening direction;

(2) the anti-loosening screw connection device has the advantages that the anti-loosening screw connection device is anti-loosening, not only is the installation mode simple and convenient, and is easy to operate, but also the anti-loosening effect is obvious, the connection is reliable, the risk of separation is avoided even the screw is used for a long time, meanwhile, the application occasion is wide, and the anti-loosening screw connection device is suitable for all hexagon socket head screws;

(3) the assembly and disassembly are convenient, the interchangeability is high, and the reuse can be realized.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is an exploded schematic view of the present invention;

FIG. 2 is an exploded schematic view of the locking cap assembly;

FIG. 3 is a schematic structural view of the upper disk;

FIG. 4 is a schematic view of the stop washer;

FIG. 5 is a schematic view of the locking cap assembly of the present invention prior to assembly;

FIG. 6 is a schematic view of the locking cap assembly of the present invention after assembly;

fig. 7 is a cross-sectional view of fig. 6.

In the figure: 1. the locking device comprises a locking cover, 2 parts of an upper gear disc, 3 parts of a spring, 4 parts of a lower gear disc, 5 parts of a fastening nut, 6 parts of a screw head, 7 parts of a stop washer, 8 parts of a screw rod, 9 parts of a first connecting block, 10 parts of a second connecting block, 11 parts of a central shaft, 12 parts of screw threads, 13 parts of a locking lug, 14 parts of a connecting part, 15 parts of a clamping jaw, 21 parts of a first mounting hole, 22 parts of a locking clamping groove, 41 parts of an outer hexagonal shaft, 42 parts of a tooth, 71 parts of an ear groove and 72 parts of a protrusion.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The screw anti-loosening device shown in the figures 1-4 is used for fastening and loosening prevention of a first connecting block 9 and a second connecting block 10 and comprises a stop washer 7 and a locking cover assembly, wherein the stop washer 7 is sleeved on a screw rod 8 of a screw, the locking cover assembly is installed on a screw head 6 of the screw, and the stop washer 7 is connected with the locking cover assembly in a matched mode to achieve loosening prevention of the screw.

The locking cover assembly comprises a locking cover 1, the locking cover 1 comprises a cover plate main body, a central shaft 11 is arranged in the center of the cover plate main body, a threaded section 12 is arranged at the front end of the central shaft 11, two connecting parts 14 are uniformly arranged on the edge of the cover plate main body, and clamping claws 15 are arranged at the tail ends of the connecting parts 14;

the center of the upper gear wheel 2 is provided with a first mounting hole 21;

the lower gear disc 4 is provided with a second mounting hole in the center, the lower gear disc 4 comprises an outer hexagonal shaft 41 and a tooth part 42 which are connected, and the outer hexagonal shaft 41 is inserted into an inner hexagonal counter bore of the screw head part 6 and used for limiting the circumferential rotation of the locking cover component;

after the central shaft 11 sequentially passes through the first mounting hole 21 of the upper gear disc 2 and the second mounting hole of the lower gear disc 4, the threaded section 12 is in threaded connection with a fastening nut 5.

A spring 3 is arranged between the upper gear disc 2 and the lower gear disc 4, and the spring 3 is sleeved outside the central shaft 11.

The stop washer 7 is provided with an annular washer main body, ear grooves 71 are uniformly distributed on the edge of the washer main body, and the ear grooves 71 are matched and clamped with the clamping claws 15. The claws 15 snap into the ear grooves 71 preventing the locking cap 1 from loosening along the screw axis and rotating circumferentially.

The gasket body is also provided with a protrusion 72, and the ear grooves 71 and the protrusion 72 are respectively positioned on the front surface and the back surface of the gasket body. When a tightening torque is applied to the screw, the projection 72 engages under the effect of the tightening force in the first connecting piece 9, which has the effect of preventing the locking washer 7 from rotating circumferentially.

The cover plate main body is also provided with a locking lug 13, and the locking lug 13 is positioned at the joint of the cover plate main body and the central shaft 11; last gear wheel dish 2 is equipped with locking draw-in groove 22, and locking lug 13 card is gone into locking draw-in groove 22, further plays the circumference positioning action to last gear wheel dish 2, prevents to go up 2 circumferential directions rotations of gear wheel dish.

The assembly process of the screw locking device is as follows:

(1) firstly, sequentially installing an upper gear disc 2, a spring 3 and a lower gear disc 4 into a central shaft 11 of a locking cover 1, ensuring that a locking clamping groove 22 of the upper gear disc 2 is clamped into a locking lug 13 to limit circumferential rotation of the upper gear disc 2, and then screwing a fastening nut 5 on a thread section 12 of the locking cover 1, wherein the whole locking cover assembly is integrated;

(2) assembling a screw, namely sleeving a stop washer 7 on a screw rod 8 of the screw, then penetrating the screw through a first connecting block 9 and screwing the screw into a second connecting block 10, and screwing the screw;

(3) the locking cover assembly is assembled with the stop washer 7, the outer hexagonal shaft 41 of the locking cover assembly is inserted into the inner hexagonal counterbore of the screw head part 6, (note that the upper and lower gear discs are in a separation state under the action force of the inner spring 3 of the locking cover assembly in a natural state), at the moment, the locking cover 1 is rotated in the circumferential direction, the barb claws 15 of the locking cover 1 are adjusted to be arranged above the lug grooves 71 of the stop washer 7 (as shown in fig. 5), then the locking cover 1 is pressed (the connecting part 14 in the locking cover 1 belongs to an elastic material), so that the claws 15 are clamped into the lug grooves 71 of the stop washer 7, and the assembly is finished (as shown in fig. 6 and 7).

The disassembling process of the screw anti-loosening device comprises the following steps: the connecting parts 14 at the two sides of the locking cover 1 are pressed to enable the claws 15 to be separated from the lug grooves 72, then the locking cover 1 is separated from the stop gasket 7 under the action force of the internal spring 3, and the disassembly is completed.

While particular embodiments of the present invention have been described in the foregoing specification, the present invention is not limited to the specific embodiments, and modifications and variations of the foregoing detailed description can be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. A screw locking device is used for fastening and locking a first connecting block (9) and a second connecting block (10), and is characterized in that: the locking device comprises a stop washer (7) and a locking cover assembly, wherein the stop washer (7) is sleeved on a screw rod (8) of a screw, the locking cover assembly is installed on a screw head (6) of the screw, and the stop washer (7) is connected with the locking cover assembly in a matched mode and used for achieving locking of the screw.

2. A screw retaining device as claimed in claim 1, wherein: the locking cover assembly comprises a locking cover (1), the locking cover (1) comprises a cover plate main body, a central shaft (11) is arranged in the center of the cover plate main body, a threaded section (12) is arranged at the front end of the central shaft (11), a plurality of connecting parts (14) are uniformly arranged on the edge of the cover plate main body, and clamping claws (15) are arranged at the tail ends of the connecting parts (14);

the center of the upper gear disc (2) is provided with a first mounting hole (21);

the lower gear disc (4), a second mounting hole is formed in the center of the lower gear disc (4), the lower gear disc (4) comprises an outer hexagonal shaft (41) and a tooth part (42) which are connected, and the outer hexagonal shaft (41) is inserted into an inner hexagonal counter bore of the screw head part (6);

after the central shaft (11) sequentially penetrates through the first mounting hole (21) of the upper gear disc (2) and the second mounting hole of the lower gear disc (4), the threaded section (12) is in threaded connection with a fastening nut (5).

3. A screw retaining device as claimed in claim 2, wherein: a spring (3) is arranged between the upper gear disc (2) and the lower gear disc (4), and the spring (3) is sleeved on the outer side of the central shaft (11).

4. A screw retaining device as claimed in claim 2 or 3, wherein: the locking gasket (7) is provided with an annular gasket main body, the edge of the gasket main body is uniformly provided with ear grooves (71), and the ear grooves (71) are matched and clamped with the clamping claws (15).

5. The screw retaining device of claim 4, wherein: the gasket main body is also provided with a bulge (72), and the ear grooves (71) and the bulge (72) are respectively positioned on the front surface and the back surface of the gasket main body.

6. A screw retaining device as claimed in claim 2, wherein: the cover plate main body is also provided with a locking lug (13), and the locking lug (13) is positioned at the joint of the cover plate main body and the central shaft (11); the upper gear disc (2) is provided with a locking clamping groove (22), and the locking lug (13) is clamped into the locking clamping groove (22).