CN210531575U

CN210531575U - Oil return structure of gear box

Info

Publication number: CN210531575U
Application number: CN201921087949.4U
Authority: CN
Inventors: 陈昌俊; 徐秀波; 吴琼; 孙婷娜; 陈一铭
Original assignee: AECC Harbin Dongan Engine Co Ltd
Current assignee: AECC Harbin Dongan Engine Co Ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-05-15
Anticipated expiration: 2029-07-11

Abstract

The utility model relates to a gear box field, in particular to gear box oil return structure who improves oil filter mounted position. The gearbox oil return structure comprises an oil return pipeline (1) communicated with the cavity (2), wherein the oil return pipeline (1) is internally provided with an oil filter (3), a filter screen (31) of the oil filter (3) is a cylinder with an open end face, the open end of the filter screen (31) faces to the outlet of the oil return pipeline (1), and the filter screen (31) extends into the cavity (2) from the opening direction. The utility model provides a current structure and space to under the convenient dismouting prerequisite, can improve the structural style of filter screen dirt holding capacity, avoid because of the big trouble of gear box overtemperature that the filter screen blockked up and cause.

Description

Oil return structure of gear box

Technical Field

The invention relates to the field of gear boxes, in particular to a gear box oil return structure for improving an oil filter installation position.

Background

Lubricating oil in a lubricating oil system of a transmission gear box is inevitably polluted, and mainly comprises abrasion and corrosion of friction coupling parts, lubricating oil coking or greasy filth, sand and dust entering from the outside, machining residue which is not cleaned cleanly and the like, so that the filter screen assembly is an essential part of the lubricating oil system of the transmission gear box. The filter screen that uses in a certain drive gear case at present is a toper graticule mesh formula filter screen, directly adorns in putting the oil pipe of gear case, like figure 1, simple structure, and the installation is maintained conveniently, can satisfy the user demand in product normal use. However, when a certain part of the transmission gear box is damaged and more metal powder or impurities are generated, the filter screen is easy to block, so that the oil return of the gear box is not smooth, and the lubricating oil is accumulated in the gear cavity. Under the high-speed rotation stirring of gear, the oil temperature in the intracavity rises sharply, and the whole overtemperature of gear box causes serious secondary fault.

Disclosure of Invention

The technical problems solved by the invention are as follows: the utility model provides a current structure and space to under the convenient dismouting prerequisite, can improve the structural style of filter screen dirt holding capacity, avoid because of the big trouble of gear box overtemperature that the filter screen blockked up and cause.

The technical scheme of the invention is as follows: the utility model provides a gear box oil return structure, gear box oil return structure installs oil in the oil return pipeline including the oil return pipeline of intercommunication cavity and strains, and the filter screen that oil was strained is one end terminal surface open-ended cylinder, and the open end of filter screen is towards the export of oil return pipeline, and the filter screen extends in the cavity from the opening direction.

Preferably, a gap is arranged between the outer circumferential surface of the filter screen and the inner wall of the cavity. Can guarantee the smooth installation of filter screen, do not influence the flow area of filter screen to promote and hold dirty ability.

Preferably, the oil filter further comprises a framework, and the filter screen is wrapped on the periphery of the framework. The strength of the filter screen can be improved by increasing the skeleton structure, and the length of the filter screen is increased. The flow area and the dirt holding capacity of the filter screen can be greatly improved.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic diagram of an oil filter structure.

In the figure: 1-oil return pipeline 2-cavity 3-oil filter 4-shell 31-filter screen 32-framework 33-mounting edge 34-overflow hole

Detailed Description

As shown in fig. 1, the prior art structure, which can facilitate the disassembly and cleaning of the oil filter, assembles the oil filter 3 in the oil return line 1. But because the influence of oil return pipeline inner space, the length and the diameter of filter screen 31 all can receive very big restriction, because the restriction in space, oil is strained 3 and is difficult to increase skeleton texture, for guaranteeing oil and strain 3's intensity, can only be with filter screen 31 design for the toper structure, the flow area who leads to is less. When parts in the transmission gear box are worn and damaged, the dropped metal scraps can be accumulated to the oil return opening along with lubricating oil, and the oil return pipeline 1 and the oil filter 3 are easily filled and covered, so that unsmooth oil return of the gear box is caused. Causing the accumulation of lubricating oil inside the cavity 2 inside the casing 4, rapidly increasing the temperature under the agitation of the rotating parts inside the gearbox, causing the over-temperature damage of the whole product, causing major secondary failures.

As shown in fig. 2, in the present technical solution, the oil filter 3 is adjusted from being installed in the oil return pipeline 1 to being installed in the cavity 2, and the assembly direction is assembled from outside to inside in order to ensure that the filter screen is convenient to disassemble.

As shown in figure 3, for the dirt holding capacity of the oil filter 3 of the promotion as large as possible, the space of the cavity 2 is fully utilized in the scheme, and the oil filter 3 is designed into a cylindrical structure. The improved oil filter consists of a filter screen 31 and a framework 32, the filter screen 31 is welded on the cylindrical surface of the framework 32 in a coating mode, and the diameter of the oil filter 3 is determined according to the diameter of a mounting hole and the distance between the diameter of the mounting hole and the side wall of the cavity 2, so that the oil filter is mounted and the gap between the oil filter and the inner wall of the cavity is guaranteed. The frame 32 is provided with a mounting edge 33 for axial positioning. The length of the framework 32 is designed to be as long as possible according to the space of the cavity 2, and the cylindrical surface and the end surface of the framework are both provided with overflow holes 34 to ensure the flow area of lubricating oil.

This technical scheme is on not changing the relevant part basis of current structure, and the dirty ability of holding of the space promotion oil filter of make full use of cavity 2 reaches the purpose that prevents the oil filter jam.

Claims

1. A gearbox oil return structure is characterized in that: the gearbox oil return structure comprises an oil return pipeline (1) communicated with a cavity (2), wherein an oil filter (3) is installed in the oil return pipeline (1), one end face of the oil filter (3) is open, the open end of the oil filter (3) faces to the outlet of the oil return pipeline (1), and the oil filter (3) extends into the cavity (2) from the opening direction.

2. A gearbox oil return structure as defined in claim 1, wherein: the filter screen (31) of the oil filter (3) is a cylinder with an opening on one end face.

3. A gearbox oil return structure as defined in claim 2, wherein: a gap is arranged between the outer circumferential surface of the filter screen (31) and the inner wall of the cavity (2).

4. A gearbox oil return structure as defined in claim 2, wherein: the oil filter (3) further comprises a framework (32), and the framework (32) is coated with the filter screen (31).

5. A gearbox oil return structure as defined in claim 1, wherein: the filter screen (31) of the oil filter (3) is a cone with an opening at one end face.

6. A gearbox oil return structure as defined in claim 5, wherein: a gap is arranged between the excircle conical surface of the filter screen (31) and the inner wall of the cavity (2).

7. A gearbox oil return structure as defined in claim 5, wherein: the oil filter (3) further comprises a framework (32), and the framework (32) is coated with the filter screen (31).

8. A gearbox oil return structure as defined in claim 7, wherein: the framework (32) is provided with overflow holes.