CN216691838U

CN216691838U - Pull rod structure capable of injecting lubricating grease

Info

Publication number: CN216691838U
Application number: CN202122320254.XU
Authority: CN
Inventors: 赵冬柏; 孙永环; 初兵; 徐文良; 姚李阳
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: 2022-06-07
Anticipated expiration: 2031-09-24

Abstract

The application provides a can annotate stay structure of lubricating grease, stay structure includes: the pull rod comprises a pull rod body, wherein an earring joint is arranged at the end part of the pull rod body, and an oil filling hole penetrating through the wall of the end head is formed in the earring joint; the oil filling nozzle is arranged in the oil filling hole; and the inner ring is arranged in the ear ring joint, and lubricating oil can be injected between the inner ring and the ear ring joint through the oil injection nozzle. The pull rod structure that this application provided can directly pour into lubricating grease into between inner ring and the earrings through setting up the oil filler point to can make pull rod structure's earrings realize miniaturizing, but the rapid replenishment lubricating grease between the contact surface of earrings and inner ring improves maintenance efficiency, has reduced coefficient of friction, improves the service environment under the heavy load operating mode, has prolonged pull rod life.

Description

Pull rod structure capable of injecting lubricating grease

Technical Field

The application belongs to the technical field of mechanical connection, in particular to a pull rod structure capable of injecting lubricating grease.

Background

The pull rod is a common mechanical connection structure, in a transmission pull rod used for an airplane control system, a bearing is usually embedded in an earring joint of the pull rod, and in order to ensure that the pull rod has enough strength, the earring needs to have a certain wall thickness, so that the size of an end head (or the earring joint) of the pull rod is larger; meanwhile, the bolt connection at the hinged position of the pull rod needs to be disconnected during daily maintenance, lubricating grease can be brushed between the inner ring and the outer ring of the bearing after the inner ring of the bearing is turned out, and the maintenance is inconvenient.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to provide a grease injectable drawbar arrangement 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 tie rod structure, said tie rod structure comprising:

the pull rod comprises a pull rod body, wherein an earring joint is arranged at the end part of the pull rod body, and an oil filling hole penetrating through the wall of the end head is formed in the earring joint;

the oil filling nozzle is arranged in the oil filling hole; and

and the inner ring is arranged in the earring joint, and lubricating oil can be injected between the inner ring and the earring joint through the oil injection nozzle.

Furthermore, the pull rod body and the earring joint are integrally formed.

Further, the inner surface of the earring joint and the outer surface of the inner ring are spherical surfaces which are matched.

Furthermore, a notch is arranged at the edge of the earring joint, and the notch is of a plane structure.

Further, the gap is no more than half of the thickness of the earring joint in the thickness direction of the earring joint.

Further, when there are two or more gaps, the gaps are uniformly distributed with the axis of the earring joint.

Furthermore, the number of oil filler points on the earring joint is two, and the axis of the pull rod body is uniformly distributed on two sides of the earring joint.

The pull rod structure that this application provided can directly pour into lubricating grease into between inner ring and the earrings through setting up the oil filler point to can make pull rod structure's earrings realize miniaturizing, but the rapid replenishment lubricating grease between the contact surface of earrings and inner ring improves maintenance efficiency, has reduced coefficient of friction, improves the service environment under the heavy load operating mode, has prolonged pull rod life.

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 a partial cross-sectional view of a grease-injectable tie rod construction of the present application.

Fig. 2 is an appearance schematic diagram of a grease-injectable pull rod structure of the present application.

Fig. 3 is a schematic view of a pull rod structure in the present application.

Fig. 4 is a schematic view of the inner ring 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 solve the above problems encountered in the background art and improve the use environment of the pull rod, the present application proposes a pull rod structure capable of injecting grease to reduce the size of the earring, and adding grease through the oil nozzle to reduce the friction coefficient of the contact surface.

As shown in fig. 1 to 4, the present application provides a grease-injectable pull rod structure including a pull rod 1, a grease nipple 2, and an inner ring 3. The tie rod 1 has a tie rod body 11, the cross-section of the tie rod body 11 being generally circular. An earring joint 12 is arranged at the end part of the pull rod body 11, the middle part of the earring joint 12 is a through hole 13, and an oil filling hole 14 penetrating through the wall thickness of the earring joint is arranged on the side wall of the earring joint 12. The oil filler nozzle 2 is mounted in an oil filler hole 14 for connecting an oil filler device, wherein the oil filler nozzle 2 is connected with the earring joint 12 in a threaded manner. The inner ring 3 is arranged in the through hole 13 and is matched with the earring joint 12. The lubricating grease injected through the oil nozzle 2 can flow into the gap between the inner ring 3 and the lug joint 12 to lubricate the two.

In an embodiment of the present application, the drawbar body 11 and the ear ring joint 12 are integrally formed to improve the structural strength of the drawbar 1.

In the preferred embodiment of the present application, the oil injection hole 14 is provided at two locations, which are uniformly distributed on both sides of the ear ring joint 12 with the drawbar body 11 as an axis, so that the grease can be uniformly distributed between the ear ring joint 12 and the inner ring 3.

As shown in fig. 3 and 4, the outer surface 31 of the inner ring 3 and the inner surface of the earring joint 12 which are in contact with each other are spherical, and the inner surface 32 of the inner ring 3 is flat.

In order to realize the installation of the inner ring 3, a notch 15 is arranged at the edge of the through hole of the earring joint 12, and the notch 15 is arranged in a plane structure and forms a certain angle with the end surface of the earring joint 12. Preferably, the notches 15 may be provided in two or more, and a plurality of notches 15 are generally evenly distributed in the circumferential direction of the axis of the through hole 13. Furthermore, the notch 15 is preferably not too deep in the thickness direction of the ear loop connector 12, and it does not exceed half the thickness of the ear loop connector.

The utility model provides a direct outer loop that utilizes earring joint 12 as the bearing among the draw bar structure, inner ring 3 is as the inner ring of bearing, lubricate through lubricating grease, can realize draw bar structure's miniaturization, especially the miniaturization at earring position, compare in traditional structure earring position place the bearing rotate connect with saying so, simple structure has, small, light in weight, accessible oiling hole supplements lubricating grease to the fitting surface of earring joint and inner ring fast between the contact surface of earring joint and inner ring, the efficiency of maintenance is improved, the coefficient of friction is reduced, improve the service environment under the heavy load operating mode, the pull bar life has been prolonged.

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 tie rod structure, said tie rod structure comprising:

the pull rod (1) is provided with a pull rod body (11), an earring joint (12) is arranged at the end part of the pull rod body (11), and an oil filling hole (14) penetrating through the wall of the end head is formed in the earring joint (12);

the oil filling nozzle (2) is installed in the oil filling hole (14); and

and an inner ring (3) installed in the earring joint (12), and lubricating oil can be injected between the inner ring (3) and the earring joint (12) through the oil injection nozzle (2).

2. Grease injectable tie rod structure according to claim 1, characterized in that the tie rod body (11) and the lug joint (12) are integrally formed.

3. Grease-injectable tie rod construction according to claim 1, characterized in that the inner surface of the earring joint (12) and the outer surface of the inner ring (3) are co-operating spherical surfaces.

4. Grease-injectable tie rod construction according to claim 1, characterized in that a notch (15) is provided at the edge of the earring joint (12), said notch (15) being of planar construction.

5. Grease-injectable tie rod construction according to claim 4, characterized in that the said gap (15) does not exceed half the thickness of the earring joint (12) in the direction of the thickness of the earring joint (12).

6. The structure of a tie-rod that can be filled with grease according to claim 4 or 5, characterized in that when there are two or more notches (15), said notches (15) are distributed uniformly about the axis of the lug joint (12).

7. The grease-injectable draw-bar structure according to claim 1, wherein the number of the grease holes (14) in the earring joint (12) is two, and the axis of the draw-bar body (11) is uniformly distributed on both sides of the earring joint (12).