CN219327773U

CN219327773U - Runner structure for supplying oil to front end bearing of differential mechanism of oil-cooled motor reducer

Info

Publication number: CN219327773U
Application number: CN202320527402.1U
Authority: CN
Inventors: 沈洪军; 何胜平; 宾彬; 王源; 于爱军; 彭凯雄; 杨超
Original assignee: Zhuzhou Gear Co Ltd
Current assignee: Zhuzhou Gear Co Ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-07-11
Anticipated expiration: 2033-03-17

Abstract

The utility model discloses a flow passage structure for supplying oil to a front end bearing of a differential mechanism of an oil-cooled motor reducer, which comprises an oil pump mounting hole arranged on a front shell adjacent to the front end bearing position of the differential mechanism, wherein a pumped oil flow passage structure is arranged on the inner wall of a section of an oil pump pumping output port in the oil pump mounting hole, a first through hole which is opened on the front shell and communicated with the pumped oil flow passage structure is arranged on the front shell beside the front end bearing position of the differential mechanism, a second through hole which is opened on one side of the first through hole and communicated with the front end bearing position of the differential mechanism is arranged on one side of the first through hole, the first through hole is intersected and communicated with the second through hole, and an oil plug I and an oil plug II are respectively arranged on the opening of the first through hole and the second through hole on the front shell. The advantages are that: the continuous and stable oil supply can be ensured; the special oil pump is not needed, and the problem of active lubrication of the bearing position at the front end of the differential is solved nearby by only using the oil pump which supplies oil for the cooler through the oil-cooled motor reducer.

Description

Runner structure for supplying oil to front end bearing of differential mechanism of oil-cooled motor reducer

Technical Field

The utility model relates to a flow passage structure for supplying oil to a bearing at the front end of a differential mechanism of an oil-cooled motor reducer, and belongs to the technical field of lubrication of electric drive reducers.

Background

In oil-cooled electric drive, an electronic oil pump is generally required to provide lubricating oil with oil pressure, the lubricating oil is filtered by a filter and then is cooled by a heat exchanger, and the cooled lubricating oil is divided into two paths to respectively cool a motor stator and a motor rotor.

At present, a bearing in a new energy transmission body is generally formed by designing a reinforcing rib and an oil guiding structure in an inner cavity of a shell, stirring lubricating oil by a gear rotating at a high speed, draining the splashed lubricating oil, and lubricating the bearing. In general, a splash lubrication method is adopted for a front end bearing of the differential mechanism, so that the main reduction gear agitates the lubricating oil at the bottom of the shell to guide the splashed lubricating oil to flow into the front end bearing for lubrication. Because the axial distance between the front end bearing of the differential mechanism and the main reduction gear is far, the oil guide groove and the oil guide rib are designed on the shell to guide splash lubricating oil, and the differential mechanism has the following defects: firstly, oil in the groove is often interrupted due to vibration or sudden braking or deflection overflow of the vehicle body; secondly, at low speed and on up and down slopes and inclined road conditions, the problem that the splashing lubrication effect is poor and the lubrication of the bearing is insufficient exists. The above can seriously affect bearing life.

Through the search, the patent literature of the application number 202210360794.7, the utility model name of the patent literature is an active lubrication structure of a differential mechanism with a differential lock, the application number 202221662015.0, and the utility model name of a device for supplying oil to a main reduction gear outside a differential shell by taking tangential hydraulic pressure as the inside of the shell. Both patent documents relate to active lubrication of differential bearings, but neither relates to or is associated with motor oil cooling. The above patent document does not disclose how the oil-cooled motor reducer actively lubricates the differential front end bearing by using an oil pump for supplying oil to the cooler, because the motor oil-cooling has a special arrangement.

The utility model aims to solve the technical problems that: how to actively lubricate the front end bearing of the differential by using an oil pump for supplying oil to the cooler.

Disclosure of Invention

A flow passage structure for supplying oil to a bearing at the front end of a differential mechanism of an oil-cooled motor reducer comprises an oil pump mounting hole arranged on a front shell adjacent to the bearing position at the front end of the differential mechanism, a pumped oil flow dividing structure is arranged on the inner wall of a section of an oil pump pumping output port in the oil pump mounting hole, a first through hole which is opened on the front shell and communicated with the pumped oil flow dividing structure is arranged on the front shell beside the bearing position at the front end of the differential mechanism, a second through hole which is opened on one side of the first through hole and communicated with the bearing position at the front end of the differential mechanism is arranged on the terminal of the front shell, the first through hole is intersected and communicated with the second through hole, and an oil plug and a second oil plug are respectively arranged on the openings of the first through hole and the second through hole and the front shell.

Further, the pump oil outlet flow dividing structure comprises flow dividing grooves which are respectively communicated with the through hole I and the pump outlet of the oil pump.

Further, the oil pumping oil diversion structure comprises an annular table which radially and centripetally protrudes from the inner wall of the oil pump mounting hole, and the diversion groove is axially formed on the annular table.

Further, the diversion grooves are formed in the annular table surface facing to one side of the hole of the oil pump mounting hole.

Further, an input notch communicated with the pumping output port of the oil pump is formed in the inner side wall of the splitter box, and an output notch communicated with the first through hole is formed in the outer side wall of the splitter box.

Further, the input notch and the output notch are arranged on the same radial line.

Advantageous effects

1. The continuous and stable oil supply can be ensured;

2. the special oil pump is not needed, and the problem of active lubrication of the bearing position at the front end of the differential is solved nearby by only using the oil pump which supplies oil for the cooler through the oil-cooled motor reducer.

Drawings

FIG. 1 is a schematic cross-sectional view of a flow path structure on a front housing for supplying oil to a differential front end bearing of an oil cooled motor reducer;

FIG. 2 is a partial schematic view of FIG. 1;

fig. 3 is a perspective view of the oil pump mounting hole.

In the figure: 100. a front housing; 1. bearing position at front end of differential mechanism; 2. an oil pump mounting hole; 3. a first through hole; 302. an oil plug I; 4. a second through hole; 401. oil blocking II; 5. an annular table; 6. a shunt channel; 601. an input notch; 602. and outputting the notch.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1 and 2, a flow passage structure for supplying oil to a front end bearing of a differential mechanism of an oil-cooled motor reducer comprises an oil pump mounting hole 2 arranged on a front casing 100 adjacent to a front end bearing position 1 of the differential mechanism, a pumped oil flow distribution structure is arranged on the inner wall of a section of an oil pump pumping output port in the oil pump mounting hole 2, a first through hole 3 which is opened on the front casing 100 and communicated with the pumped oil flow distribution structure is arranged on the front casing 100 beside the front end bearing position 1 of the differential mechanism, a second through hole 4 which is opened on one side of the first through hole 3 and communicated with the front end bearing position 1 of the differential mechanism is arranged on one side of the first through hole 100, the first through hole 3 is communicated with the second through hole 4 in an intersecting manner, and oil plugs 302 and 401 are respectively arranged on the openings of the first through hole 3 and the second through hole 4 on the front casing 100. Therefore, a diversion structure is utilized to divide a part of lubricating oil pumped by an oil pump and conveyed to a cooler, and then the part of lubricating oil is directly conveyed to a bearing position 1 at the front end of the differential mechanism through a first straight through hole 3 and a second straight through hole 4 so as to lubricate the bearing at the front end of the differential mechanism, and compared with the groove oil supply or splash lubrication adopted in the prior art, the oil supply can be ensured to be continuously and stably; compared with the prior art, the special oil pump is not needed, and the problem of oil supply to the bearing position 1 at the front end of the differential is solved nearby by only using the oil pump which supplies oil to the cooler by the oil cooling motor reducer.

As shown in fig. 2 and 3, the pump oil flow dividing structure includes a dividing groove 6 communicating with the through hole 3 and the pump outlet of the oil pump, respectively.

Further, the oil pumping oil diversion structure comprises an annular table 5 radially protruding centripetally on the inner wall of the oil pump mounting hole 2, and the diversion groove 6 is axially formed on the annular table 5. In order to facilitate demoulding to the orifice direction of the oil pump mounting hole 2 during manufacturing, the diversion channel 6 is arranged on the table surface of the annular table 5 facing to the opening side of the oil pump mounting hole 2.

An input notch 601 communicated with an output port of the pumping pressure of the oil pump is formed in the inner side wall of the splitter box 6, and an output notch 602 communicated with the first through hole 3 is formed in the outer side wall of the splitter box 6. Meanwhile, a sealing ring (not shown in the figure) is arranged between the oil pump body of the notch of the shunt groove 6 and the inner wall of the oil pump mounting hole 2.

The input notch 601 and the output notch 602 are arranged on the same radial line, so that the lubricating oil pumped by the oil pump can directly enter the first through hole 3, and if the oil pump is installed in a staggered mode, the input notch 601 and the output notch 602 are not arranged on the same radial line, and the shunt tank 6 can also ensure that the pumped lubricating oil is conveyed to the first through hole 3.

The above embodiments are only for the purpose of more clearly describing the present utility model and should not be construed as limiting the scope of the present utility model, and any equivalent modifications should be construed as falling within the scope of the present utility model.

Claims

1. The utility model provides a runner structure to differential mechanism front end bearing oil feed of oil-cooled motor reduction gear, includes oil pump mounting hole (2) of establishing on preceding casing (100) adjacent with differential mechanism front end bearing position (1), its characterized in that: the inner wall of the section of the oil pump pressure output port in the oil pump mounting hole (2) is provided with a pumped oil flow-out structure, a first through hole (3) which is opened on the front casing (100) and communicated with the pumped oil flow-out structure is arranged on the front casing (100) beside the bearing position (1) at the front end of the differential mechanism, a second through hole (4) which is opened on the front casing (100) and communicated with the bearing position (1) at the front end of the differential mechanism is arranged on one side of the first through hole (3), the first through hole (3) is intersected and communicated with the second through hole (4), and an oil plug (302) and an oil plug (401) are respectively arranged on the openings of the first through hole (3) and the second through hole (4) on the front casing (100).

2. The flow path structure for supplying oil to a differential front end bearing of an oil-cooled motor reducer according to claim 1, characterized in that: the oil pumping and separating structure comprises a separating groove (6) which is respectively communicated with the first through hole (3) and the pumping output port of the oil pump.

3. The flow path structure for supplying oil to a differential front end bearing of an oil-cooled motor reducer according to claim 2, characterized in that: the oil pumping oil diversion structure comprises an annular table (5) radially protruding centripetally on the inner wall of the oil pump mounting hole (2), and the diversion groove (6) is axially formed in the annular table (5).

4. The flow path structure for supplying oil to a differential front end bearing of an oil-cooled motor reducer according to claim 3, wherein: the diversion groove (6) is formed on the table surface of the annular table (5) facing to one side of the hole of the oil pump mounting hole (2).

5. The flow path structure for supplying oil to a differential front end bearing of an oil-cooled motor reducer according to claim 3 or 4, characterized in that: an input notch (601) communicated with an output port of the pumping pressure of the oil pump is formed in the inner side wall of the splitter box (6), and an output notch (602) communicated with the first through hole (3) is formed in the outer side wall of the splitter box (6).

6. The flow passage structure for supplying oil to a differential front end bearing of an oil-cooled motor reducer according to claim 5, characterized in that: the input notch (601) and the output notch (602) are arranged on the same radial line.