CN216666176U

CN216666176U - Bolt structure capable of injecting lubricating grease and bolt assembly with same

Info

Publication number: CN216666176U
Application number: CN202122327196.3U
Authority: CN
Inventors: 范彦铭; 孙永环; 徐文良; 初兵; 张磊
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: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-06-03
Anticipated expiration: 2031-09-24

Abstract

The application provides a can annotate bolt structure of lubricating grease includes: the bolt comprises a bolt body, wherein an axially extending cavity and an oil discharging hole which penetrates through the side wall of the bolt body and is communicated with the cavity are formed in the bolt body; the plug cover is fixedly connected with the bolt body and used for plugging the accommodating cavity, and a through mounting hole is formed in the plug cover; the lubricating grease can flow out from the oil unloading hole communicated with the containing cavity to lubricate the outer surface of the bolt body. The bolt structure that this application provided can be under articulated bolt service environment, spontaneous contact surface output lubricating grease to articulated bolt and bearing inner ring to increase the lubrication of two contact surfaces, reduce coefficient of friction, improve articulated bolt's service environment under the heavy duty operating mode, prolonged life.

Description

Bolt structure capable of injecting lubricating grease and bolt assembly with same

Technical Field

The application belongs to the technical field of mechanical connection, in particular to a bolt structure capable of injecting lubricating grease and a bolt assembly with the same.

Background

A bolt is a common mechanical connection used to connect two components, typically subject to shear, for example, a hinge bolt used in aircraft steering systems acts as a shear resistant in the revolute pair. In this case, the connecting bolt and the inner ring of the bearing are relatively immovable, and the rotation is performed by the relative movement of the inner ring and the outer ring of the bearing, thereby performing the hinge function. However, under heavy-load working conditions, the stress situation becomes complicated due to the increase of radial force, the hinge bolt and the inner ring of the bearing may rotate relatively to cause abrasion, and in severe cases, a limit ring of a transmission system is caused, so that the service life of the bolt or the bearing is shortened.

Disclosure of Invention

It is an object of the present application to provide a grease-injectable bolt structure and a bolt assembly having the same to solve or mitigate at least one of the problems of the background art.

The technical scheme of the application is as follows: a grease injectable bolt construction comprising:

the bolt body is internally provided with an axially extending cavity and an oil relief hole which penetrates through the side wall of the bolt body and is communicated with the cavity;

the plug cover is fixedly connected with the bolt body and used for plugging the accommodating cavity, and a through mounting hole is formed in the plug cover;

the lubricating grease can flow out from the oil unloading hole communicated with the containing cavity to lubricate the outer surface of the bolt body.

Furthermore, the number of the oil unloading holes is two or more, and the oil unloading holes are uniformly distributed in the circumferential direction of the axis of the bolt body.

Furthermore, the plane where the oil discharge hole is located is close to the middle of the rod part of the bolt body.

Furthermore, the axis of the oil unloading hole points to the axis of the bolt body and the two are perpendicular.

Furthermore, the diameter of the oil unloading hole is between 0.5mm and 1 mm.

Further, the plug cover is connected with the bolt body in a threaded mode.

Furthermore, the mounting hole on the blanking cover is positioned in the middle of the blanking cover.

Further, the cross section of the cavity is circular.

Furthermore, the threaded section of the end part of the bolt body is provided with a fuse hole which penetrates through the bolt body in the radial direction.

On the other hand, the technical scheme of the application is as follows: a bolt assembly comprising a grease injectable bolt structure as described in any one of the above; and

and the nut is matched with the threaded section of the bolt body.

The bolt structure that this application provided can be under the articulated bolt service environment, spontaneous contact surface output lubricating grease to articulated bolt and bearing inner ring to increase the lubrication of two contact surfaces, reduce coefficient of friction, improve articulated bolt's service environment under the heavy load operating mode, prolonged life.

Drawings

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

Fig. 1 is a cross-sectional view of a grease-injectable bolt structure in the present application.

Fig. 2 is a perspective view of a grease-injectable bolt structure according to the present application.

Fig. 3 is an axial view of the bolt structure of the present application.

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 overcome the problems in the prior art and improve the service environment of the hinge bolt in the aircraft operating system, the application provides a bolt structure capable of injecting lubricating grease so as to reduce the friction coefficient between the hinge bolt and the bearing inner ring and prolong the service life of the hinge bolt.

As shown in fig. 1 to 3, the grease-injectable bolt structure provided by the present application mainly includes a bolt body 10, a cap 20, and a grease nipple 30.

The bolt body 10 comprises a polished rod section and a threaded section, wherein the polished rod section is used for bearing shearing force, and the threaded section is used for being matched with a nut to lock a polished rod section part. The bolt body 10 has a cavity 11 extending axially inward inside the polish rod portion, and the cavity 11 is preferably circular in shape for easy processing and bearing. The side wall of the polished rod portion of the bolt body 10 is provided with two or more oil discharge holes 12, wherein the two or more oil discharge holes 12 are uniformly distributed in the circumferential direction along the axis of the bolt body 10 to realize uniform lubrication of a bearing inner ring (not shown) matched with the polished rod portion of the bolt body. In order to realize uniform lubrication of the bearing inner ring, the plane of the axis of the oil drain hole 12 is located in the middle of the polished rod section of the bolt body 10. Preferably, the axis of the oil discharge hole 12 intersects with the axis of the bolt body 10, and the two are perpendicular to each other, so that the grease in the housing 11 can flow out from the oil discharge hole 12. Since the grease is usually a paste, the grease will flow out too much or too fast through the oversized oil discharge hole 12, and the grease will not flow out through the undersized oil discharge hole 12, in the preferred embodiment of the present application, the diameter of the oil discharge hole 12 may be between 0.5mm and 1mm, so that the grease in the cavity 11 can flow out at a proper flow rate, thereby continuously supplying the grease to the mating surfaces of the bolt structure and the bearing.

The closure 20 is of the same configuration as the shape of the receptacle 11, i.e. circular in the embodiment of the present application. The blocking cover 20 is used for blocking the accommodating cavity 11 and is fixedly connected with the bolt body 10. For example, in one embodiment of the present application, the cap 20 may be connected to the bolt body 10 by interference fit, or in another embodiment, the edge of the cap 20 may be provided with threads, and the inside of the polish rod section of the bolt body 10 may also be provided with threads, which are connected by a threaded structure. The cap 20 is provided with a mounting hole for mounting the oil nozzle 30. In the preferred embodiment of the present application, the mounting hole is located at the center of the cap 20 to reduce the moment of inertia of the bolt structure.

The oil jet 30 is of a conventional oil jet structure and is mounted on the mounting hole of the cap 20 by a screw structure. When the lubricating grease in the bolt body 10 is empty or is used up along with the use time, the lubricating grease can be rapidly supplemented to the cavity in the bolt body 10 through the oil nozzle 30 by using the oil gun, so that the cavity is filled with the heavy-load wide-temperature lubricating grease.

The bolt structure that this application provided can be under articulated bolt service environment, spontaneous contact surface output lubricating grease to articulated bolt and bearing inner ring to increase the lubrication of two contact surfaces, reduce coefficient of friction, improve articulated bolt's service environment under the heavy load operating mode, prolonged life, but also quick supply lubricating grease, improve maintenance efficiency.

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. A grease injectable bolt construction, said bolt construction comprising:

the bolt comprises a bolt body (10), wherein the bolt body (10) is internally provided with an axially extending cavity (11) and an oil discharge hole (12) which penetrates through the side wall of the bolt body (10) and is communicated with the cavity (11);

the blocking cover (20) is fixedly connected with the bolt body (10) and used for blocking the accommodating cavity (11), and a through mounting hole is formed in the blocking cover (20);

set up oiling mouth (30) in the mounting hole, through to annotate lubricating grease in oiling mouth (30), lubricating grease can from with unload oilhole (12) outflow and the surface of lubricated bolt body (10) that hold chamber (11) intercommunication.

2. The bolt structure capable of injecting lubricating grease according to claim 1, wherein the number of the oil discharge holes (12) is two or more, and a plurality of the oil discharge holes (12) are evenly distributed in the circumferential direction of the bolt body axis.

3. The grease injectable bolt structure according to claim 1 or 2, wherein the grease relief hole (12) is located in a plane near the middle of the shank of the bolt body (10).

4. A grease injectable bolt structure according to claim 3, wherein the axis of the oil discharge hole (12) is directed to the axis of the bolt body (10) and perpendicular thereto.

5. The grease injectable bolt structure according to claim 4, wherein the diameter of the oil relief hole (12) is between 0.5mm and 1 mm.

6. Grease-injectable bolt structure according to claim 1, characterised in that the cap (20) is screwed to the bolt body (10).

7. Grease injectable bolt construction according to claim 6 characterised in that the mounting hole in the cap (20) is located in the middle of the cap (20).

8. Grease-injectable bolt structure according to claim 1, characterised in that the cross-section of the cavity (11) is circular.

9. Grease-injectable bolt construction according to claim 1, characterised in that the threaded section of the end of the bolt body (10) has a fuse hole (13) arranged radially therethrough.

10. A bolt assembly, characterized in that the bolt assembly comprises a grease-injectable bolt structure according to any one of claims 1 to 9; and

and the nut is used for being matched with the threaded section of the bolt body (10).