CN210318132U

CN210318132U - Locking bolt structure that moves

Info

Publication number: CN210318132U
Application number: CN201921073213.1U
Authority: CN
Inventors: 齐邦明; 郑宏伟; 柴俭; 刘佳
Original assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Current assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-04-14
Anticipated expiration: 2029-07-10

Abstract

The application provides a locking bolt structure that moves includes: the bolt comprises a bolt body with external threads, and the outer surface of the bolt body is provided with at least one groove which is partially positioned in the external thread area and extends along the axial direction of the bolt body; the nut is provided with an internal thread matched with the external thread, and at least one end surface of the nut is provided with an annular groove; and the stop gasket comprises an annular body capable of being arranged in the annular groove and a plurality of pawls extending from the annular body to the circle center, and the pawls and the annular body form an angle, so that when at least one pawl is arranged in the groove, the rest pawls are matched with the external thread to generate pre-tightening force on the nut. The utility model provides a locking bolt structure that moves can effectively avoid the not hard up problem of spare part, if will dismantle locking bolt structure that moves, only need with the nut anticlockwise rotation by force, destroy the locking pawl. When the locking is needed again, and the looseness is prevented, the looseness-preventing nut is replaced.

Description

Locking bolt structure that moves

Technical Field

The application belongs to the technical field of bolts, in particular to anti-loosening bolt structure.

Background

Bolts are common connecting pieces, and in the anti-loosening manner of bolts, the bolts are usually prevented from loosening by either elastic gaskets or fuses. However, both of the above methods usually require additional operations, such as punching, or dotting, which increases the workload.

In addition, there is a not hard up early warning device, can shorten the perception that changes through the sensor of installing additional in the screw rod to the screw rod when having not hard up to inform or require the on-the-spot personnel to handle in time. However, this device is complex in structure and limited in that it requires a person to be found on site in time.

Disclosure of Invention

It is an object of the present application to provide a locking bolt arrangement to solve or mitigate at least one of the problems of the background art.

Therefore, the technical scheme provided by the application is as follows: a locking bolt structure, comprising:

a bolt including a bolt body having external threads, the bolt body outer surface having at least one groove partially within the external thread region and extending axially along the bolt body;

the nut is provided with an internal thread matched with the external thread, and at least one end face of the nut is provided with an annular groove; and

the stop gasket comprises an annular body capable of being arranged in the annular groove and a plurality of pawls extending from the annular body to the circle center, and the pawls and the annular body form an angle, so that when at least one pawl is arranged in the groove, the rest pawls are matched with the external thread to generate pre-tightening force on the nut.

In an embodiment of the present application, the grooves include at least one of triangular grooves or trapezoidal grooves.

In an embodiment of the application, the depth of the groove exceeds the difference between the outer diameter and the inner diameter of the external thread.

In an embodiment of the present application, an end of the pawl is interposed between an inner diameter and an outer diameter of the external thread.

In an embodiment of the application, the end of the pawl is bent away from the nut to create the angle.

In one embodiment of the present application, the pawl includes at least a first edge for limiting the unscrewing of the stop washer along the external thread and a second edge for guiding the unscrewing of the stop washer along the external thread.

In one embodiment of the present application, the number of the pawls is an integral multiple of the number of the grooves.

In one embodiment of the present application, the annular body has at least two angled slots thereon through which the stop washer is rotated.

In an embodiment of the present application, the chutes are uniformly distributed with the center of the ring-shaped body.

The utility model provides a locking bolt structure that moves can effectively avoid the not hard up problem of spare part, if will dismantle locking bolt structure that moves, only need with the nut anticlockwise rotation by force, destroy the locking pawl. When the locking is needed again, and the looseness is prevented, the looseness-preventing nut is replaced.

Drawings

In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.

Fig. 1 is an exploded view of the anti-loosening bolt according to the present application.

Fig. 2 is an assembly schematic diagram of the anti-loosening bolt structure of the present application.

FIG. 3 is a schematic view of the engagement of the stop washer with the groove of the present application.

Reference numerals:

1-bolt, 11-bolt body, 12-bolt end, 13-groove;

2-nut, 21-ring groove;

3-stop washer, 31-annular body, 32-pawl, 33-inclined groove, 321-first edge, 322-second edge.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.

In order to solve the problem that the installation between two parts is fixed reliable, the bolt structure can never loosen once the bolt is screwed down, so that the whole equipment or device cannot break down due to loosening between the parts, and the normal work of the equipment is guaranteed.

As shown in fig. 1 and fig. 2, the anti-loosening bolt structure provided by the present application mainly includes a bolt 1, a nut 2, and a stop washer 3.

The bolt 1 comprises a bolt body 11 with a bolt head 12 at one end of the bolt body 11, and one or more grooves 13 extending along the bolt axis in the threaded region of the bolt body 11. The number of the grooves 13 is determined by considering the strength of the bolt body 11, and usually, one to two grooves are required. In the embodiment of the anti-loosening bolt structure shown in fig. 1, two grooves 13 extending along the axis of the bolt body 11 are provided.

In some embodiments, the shape of the groove 13 may be a triangular groove or a trapezoidal groove. In these embodiments, when the number of grooves 13 is more than one, the shape of the grooves 13 is generally the same.

In some embodiments, the depth of the groove 13 should exceed the difference between the outer diameter and the inner diameter of the external thread on the bolt body 11, i.e., the bottom of the groove 13 exceeds the root of the external thread.

In some embodiments, the annular body 31 has at least two angled slots 33 formed therein, the stop washer 3 being rotated by the angled slots 33. In these embodiments, the chutes 33 are evenly distributed around the center of the annular body 31. As in the embodiment shown in fig. 1, the number of the inclined grooves 33 is eight, and the eight inclined grooves 33 are evenly distributed at the center of the annular body 31.

The nut 2 has an internal thread, and an annular groove 21 is provided on at least one side of the nut 2, in which annular groove 21 a stop washer 3 is placed. In the embodiment shown in fig. 1 and 2, the annular groove 21 is one, which is provided on the right end face of the nut 2. In another embodiment, the annular groove 21 may be provided on the left end surface of the nut 2, but when the annular groove 21 is provided on the left end surface of the nut 2, the nut 2 is turned upside down to be used so that the annular groove 21 always faces outward after being mounted on the bolt 1 to enable the mounting of the stopper washer 3.

The stop washer 3 includes an annular body 31, and the inside of the annular body 31 has a plurality of pawls 32 extending toward the center of the annular body 31, and the pawls 32 are at an angle to the annular body 31. The ring body 31 of the stopper 3 is installed in the ring groove 21, and when the stopper 3 is installed in the ring groove 21, the ring groove 21 is shrunk by a press-and-turn closing-in process to fix the stopper 3.

In some embodiments, the length of the detent 32 is slightly less than the depth of the recess 13, such that the end of the detent 32 can be between the inner and outer diameters of the external thread of the bolt body 11.

In some embodiments, the ends of the pawl 32 are angled away from the nut 2, and the main body of the pawl 32 is curved inwardly or outwardly to help the pawl 32 perform the pre-tensioning function on the nut 2.

In some embodiments, the pawl 32 includes at least a first edge 321 (or stop edge 321) for limiting the outward rotation of the stop washer 3 and a second edge 322 (or guide edge 322) for guiding the outward rotation of the stop washer 3. In the embodiment shown in fig. 3, the recess 13 is triangular in shape, with one side passing substantially through the center of the circle and one side not passing through the center of the circle, and accordingly the stop edge 321 of the pawl 32 also passes substantially through the center of the circle, and the guide edge 322 does not pass through the center of the circle. When the nut 2 rotates the pawl 32 (clockwise C) to tighten, the guiding edge 322 is in friction within the external thread, but does not affect the inward screwing motion of the nut 2. When the nut 2 drives the pawl 32 to rotate to a proper tightness, the pawl 32 enters the groove 13, and the stop edge 321 is attached to the corresponding edge of the groove 13, so that the nut 2 can be limited to rotate reversely.

In some embodiments, the number of the pawls 32 should be no less than three and circumferentially distributed, and normally, the number of the pawls 32 is no more than ten, for example, the number of the pawls 32 may be 6 or 8. In these embodiments, the number of pawls 32 may be set to an integral multiple of the number of grooves 13. For example, in the above embodiment, when the pawls 32 are eight and the groove 13 is one, since one rotation is 360 °, the pitch between each pawl 32 is 360/8 equal to 45 °, and the pitch of 45 ° is 45 ° which is 45 ° or an integral multiple of 45 ° after the nut is in the near-tightened state. The proper spacing can ensure that the bolt and the nut keep a proper locking workpiece state.

When the anti-loose fastening bolt is used, the stop washer 3 is firstly pressed into the groove 13, the groove 13 is tightened through a closing process to fix the stop washer 3, the nut 2 is screwed in, and the pawl 32 rotates along with the nut. When the nut 2 is rotated to a proper locking position, the pawl 32 falls into the groove 13, and the stop edge 321 of the pawl 32 is stuck with the groove 13 to prevent the nut 2 from rotating in the loosening direction. In addition, because the pawls 32 and the annular body 31 have a certain angle, the rest of the pawls 32 and the external threads of the bolt body 1 can generate a pre-tightening force of the compression nut 2, so as to further prevent loosening.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An anti-loosening bolt structure is characterized in that the anti-loosening bolt structure comprises

The bolt (1), the bolt (1) includes a bolt body (11) with external thread, the external surface of the bolt body (11) has at least one groove (13) which is partially positioned in the external thread area and axially extends along the bolt body;

a nut (2), wherein the nut (2) is provided with an internal thread matched with the external thread, and at least one end surface of the nut (2) is provided with an annular groove (21); and

the stop washer (3) comprises an annular body (31) capable of being placed in the annular groove (21) and a plurality of pawls (32) extending from the annular body (31) to the center of a circle, and the pawls (32) and the annular body (31) have angles, so that when at least one pawl (32) is placed in the groove (13), the rest pawls (32) are matched with external threads to generate pre-tightening force on the nut (2).

2. The structure of a locking bolt as defined in claim 1, characterized in that the groove (13) comprises at least one of a triangular groove or a trapezoidal groove.

3. A structure as claimed in claim 1 or 2, characterised in that the depth of the recess (13) exceeds the difference between the external and internal diameters of the external thread.

4. A locking bolt construction according to claim 1, characterised in that the end of the pawl (32) is between the inner and outer diameter of the external thread.

5. A locking bolt arrangement according to claim 1, characterised in that the end of the pawl (32) is bent away from the nut (2) to create said angle.

6. Structure as claimed in claim 4 or 5, characterized in that said pawl (32) comprises at least a first edge (321) for limiting the unscrewing of said stop washer (3) along the external thread and a second edge (322) for guiding the screwing of said stop washer (3) along the external thread.

7. A loose bolt construction according to claim 1, characterized in that the number of the pawls (32) is an integral multiple of the number of the recesses (13).

8. Anti-loosening bolt structure according to claim 1, characterized in that the annular body (31) has at least two inclined slots (33) thereon, by means of which inclined slots (33) the stop washer (3) is rotated.

9. Anti-loosening bolt structure according to claim 8, characterised in that the inclined slots (33) are evenly distributed around the centre of the ring-shaped body (31).