CN218031028U

CN218031028U - Anti-loose connecting device of structure

Info

Publication number: CN218031028U
Application number: CN202221850536.9U
Authority: CN
Inventors: 杜文君; 张晓慧; 段岩
Original assignee: Shaanxi Fast Gear Co Ltd
Current assignee: Shaanxi Fast Gear Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-12-13
Anticipated expiration: 2032-07-18

Abstract

The utility model relates to a transmission machinery equipment connects and sealed technical field, especially relates to a locking coupling device of structure, including bolt seat, nut, fixed hookup lid and fixed pin, fixed hookup lid is including the first hookup lid and the second hookup lid of connection, bolt seat is including the bolt foot, shank of bolt and the bolt head that connect gradually, bolt head and the cooperation of first hookup lid, nut threaded connection is on the shank of bolt, the nut sets up inside the second hookup lid, fixed pin is fixed in the second hookup lid outside. The utility model discloses a set up fixed connection lid and fix bolt and nut, realize the locking hookup to the transmission mechanical equipment who has the vibrations characteristic, can not cause owing to the vibration not hard up, be applicable to the permanent locking hookup of the box that has strong periodicity and aperiodic vibrations characteristic such as automobile engine, gearbox and case lid.

Description

Structure anti-loose connecting device

Technical Field

The utility model relates to a transmission machinery equipment connects and sealed technical field specifically is a locking coupling device of structure.

Background

In the use process of the mechanical equipment such as an automobile engine, a gearbox and the like, strong periodic and aperiodic vibration is generated on the whole mechanical equipment due to high-frequency reciprocating motion of a rotating motion part, so that the connection structure of a box body and a box cover of the equipment such as the engine, the gearbox and the like is loosened, leakage of lubricating oil and the like is caused, other structures are invalid, and the use safety is further reduced and the service life is prolonged.

The existing anti-loose connection between mechanical devices usually adopts the friction mode anti-loose of bolts and nuts, the mechanical mode anti-loose, the permanent mode anti-loose and the like; the friction type anti-loosening needs to generate positive pressure which is not changed along with external force between the thread pairs so as to generate friction force capable of preventing the thread pairs from being transmitted relatively, and the positive pressure is generally realized by axially or simultaneously pressing the thread pairs in two directions. If an elastic washer, a double nut, a self-locking nut, a nylon insert locking nut and the like are adopted, under the conditions of impact, vibration and variable load, the bolt can cause the reduction of pretightening force due to the looseness, and the loss pretightening force is slowly increased along with the increase of the vibration times, so that the nut can be loosened and the thread connection can be failed finally; in the mechanical anti-loosening mode, a stop piece is generally used for directly limiting the relative rotation of a thread pair, for example, a cotter pin, a series steel wire, a stop washer and the like are adopted, and the mode is difficult to disassemble and assemble; the permanent anti-loosing method generally adopts the methods of punching, welding and bonding, etc., so that the screw pair loses the characteristics of the kinematic pair and is connected into non-detachable connection.

SUMMERY OF THE UTILITY MODEL

To the problems existing in the prior art, the utility model provides a structure anti-loosening connecting device.

The utility model discloses a realize through following technical scheme:

the utility model provides a locking coupling device of structure, includes bolt seat, nut, fixed connection lid and fixed pin, fixed connection lid is including the first connection lid and the second connection lid of connection, the bolt seat is including the bolt foot, shank of bolt and the bolt head that connect gradually, the bolt head cooperates with first connection lid, nut threaded connection is on the shank of bolt, the nut sets up inside the second connection lid, the fixed pin is fixed in the second connection lid outside.

Preferably, the first coupling cover and the second coupling cover are integrally formed.

Preferably, the inner portion of the first coupling cap is disposed in a polygonal shape.

Preferably, the second coupling cover is arranged in a regular hexagon, and the nut is matched with the second coupling cover.

Preferably, a matching angle difference is reserved between the inner part of the second coupling cover and the outer wall of the nut.

Preferably, the fitting angle difference is less than or equal to 15 °.

Preferably, a fastening threaded hole is formed in the side wall of the second coupling cover, an external thread is formed in the outer wall of the fixing pin, and the fixing pin is connected with the second coupling cover through the fastening threaded hole.

Preferably, the bolt seat, the nut and the fixing pin are all made of hard metal materials.

Preferably, the fixed coupling cap is made of a forged metal material.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model relates to a locking coupling device of structure fixes bolt and nut through setting up fixed joint cover, realizes the locking hookup to the transmission machinery equipment that has the vibrations characteristic, can not cause owing to the vibration not hard up, is applicable to the permanent locking hookup of the box that has strong periodicity and aperiodic vibrations characteristic and case lid such as automobile engine, gearbox. Secondly, simple structure and installation dismantle convenient, have certain precision's strong adaptability.

Furthermore, the first connecting cover is matched with the bolt head, and the second connecting cover is matched with the nut, so that the connecting mode is simple in structure, and the connecting structure has the advantage of convenience in mounting and dismounting.

Furthermore, the matching angle difference is convenient for finely adjusting the nut, so that the connection mode has certain precision and can adapt to working conditions of high and low temperature, strong vibration and the like.

Furthermore, the bolt seat, the nut and the fixing pin which are made of hard metal materials are used for ensuring the structural strength and the connection stability, so that the looseness of connection caused by vibration can be avoided, and the locking can be avoided.

Drawings

Fig. 1 is a schematic structural view of a structural anti-loose coupling device of the present invention;

fig. 2 is a schematic view of a bolt head in the anti-loose coupling device of the present invention;

fig. 3 is a schematic structural view of the fixed coupling cover in the anti-loose coupling device of the present invention.

In the figure, 1, a bolt seat; 11. a bolt foot; 12. a bolt shank; 13. a bolt head; 2. a nut; 3. a fixed coupling cap; 31. a first coupling cover; 32. a second coupling cover; 4. and fixing the pin.

Detailed Description

The present invention will be described in further detail with reference to specific examples, which are intended to be illustrative rather than restrictive.

The utility model discloses a locking coupling device of structure refers to fig. 1, 2, including bolt seat 1, nut 2, fixed hookup lid 3 and fixed pin 4, bolt seat 1 is including connecting gradually and integrated into one piece's bolt foot 11, shank of bolt 12 and

bolt head

13, 2 threaded connection of nut on shank of bolt 12. The bolt rod 12 is a bolt with specification Ma, the diameter is generally phi 8 mm-40 mm, the bolt head 13 is a regular polygon, and the regular polygon is generally a regular 8-edge shape, a regular 10-edge shape, a regular 12-edge shape, a regular 14-edge shape and a regular 16-edge shape; the size specification of the circumscribed circle of the regular polygon of the bolt head 13 is d1, and the diameter of the circumscribed circle of the regular polygon is designed to be the small diameter of the thread Ma. The relationship between the number of sides of the regular polygon of the bolt head 13 and the accuracy of the loose-proof coupling is shown in table 1.

TABLE 1 relationship between number of regular polygon sides and precision of anti-loosening coupling device

The fixed coupling cover 3 comprises a first coupling cover 31 and a second coupling cover 32 which are integrally formed, the inside of the first coupling cover 31 is arranged in a polygonal shape, and the bolt head 13 is matched with the first coupling cover 31.

Referring to fig. 3, the regular hexagon circumscribed circle of the fixed connection cover 3 has a size specification of Mc, a general size range of Mb 1.2 to 1.4 times, a height of L, and a general size range of L1+ L2; the inner shape of the first coupling cap 31 is a regular polygon with circumscribed circle dimension d1, which is consistent with the shape of the bolt head 13, the design height is l1, and the general dimension range is d1 which is 0.5 to 1.2 times.

The internal shape of the second coupling cap 32 is hexagonal with the external shape of a standard nut whose thread is Ma, the design height is l2, and the general size range is 0.5 to 1.2 times Ma.

The nut 2 is arranged inside the second coupling cover 32, the inside of the second coupling cover 32 is arranged in a regular hexagon, and the nut 2 is matched with the second coupling cover 32. The nut 2 is a standard nut with a thread Ma, and the size specification of a regular hexagon circumscribed circle is Mb.

A fitting angle difference of less than or equal to 15 ° is left between the inside of the second coupling cap 32 and the outer wall of the nut 2.

The fixing pin 4 is fixed to the outside of the second coupling cover 32. The side wall of the second coupling cover 32 is provided with a fastening threaded hole, the outer wall of the fixing pin 4 is provided with an external thread, and the fixing pin 4 is connected with the second coupling cover 32 through the fastening threaded hole.

The bolt seat 1, the nut 2 and the fixing pin are all made of hard metal materials, such as 1Cr18Ni9Ti.

The stationary coupling cover 3 is made of a forged metal material, for example, 30CrMnSiA or D406A.

The utility model relates to an installation order of structure locking coupling device as follows:

firstly, connecting and fastening structures such as a box body and the like through a bolt seat 1 and a nut 2, then placing a fixed connecting cover 3, and enabling the inner shape of a first connecting cover 31 to be matched with the regular polygon shape of a bolt head 13 and the inner shape of a second connecting cover 32 to be matched with the regular hexagon shape of the nut 2; when the inner shape of the first coupling cover 31 is just matched with the regular polygon shape of the bolt head 13, the inner shape of the second coupling cover 32 has a matching angle difference not greater than 15 degrees with the regular hexagon shape of the nut 2, the nut 2 needs to be finely adjusted and matched, and finally the fixing pin is screwed into the fastening threaded hole on the fixing coupling cover 3 for fastening.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The anti-loosening connecting device for the structure is characterized by comprising a bolt seat (1), a nut (2), a fixed connecting cover (3) and a fixed pin (4), wherein the fixed connecting cover (3) comprises a first connecting cover (31) and a second connecting cover (32), the bolt seat (1) comprises a bolt foot (11), a bolt rod (12) and a bolt head (13) which are sequentially connected, the bolt head (13) is matched with the first connecting cover (31), the nut (2) is in threaded connection with the bolt rod (12), the nut (2) is arranged inside the second connecting cover (32), and the fixed pin (4) is fixed on the outer side of the second connecting cover (32).

2. A structural anti-loose coupling device according to claim 1, characterized in that said first coupling cover (31) is integrally formed with a second coupling cover (32).

3. Structural anti-loose coupling according to claim 1, characterized in that the inside of said first coupling cap (31) is arranged in a polygon.

4. Structural anti-loose coupling according to claim 1, characterized in that the second coupling cap (32) is internally arranged in a regular hexagon, the nut (2) cooperating with the second coupling cap (32).

5. Structural anti-loose coupling according to claim 4, characterized in that there is a fitting angular difference between the inside of the second coupling cap (32) and the outer wall of the nut (2).

6. A structural anti-loose coupling according to claim 5, characterized in that said mating angle difference is less than or equal to 15 °.

7. The structure anti-loose coupling device according to claim 1, characterized in that the side wall of the second coupling cover (32) is provided with a fastening threaded hole, the outer wall of the fixing pin (4) is provided with an external thread, and the fixing pin (4) is connected with the second coupling cover (32) through the fastening threaded hole.

8. Structural anti-loose coupling according to claim 1, characterized in that the bolt seat (1), the nut (2) and the fixing pin (4) are made of hard metal material.

9. Structural anti-loose coupling according to claim 1, characterized in that said fixed coupling cover (3) is made of forged metal material.