A cooling and lubrication arrangement for an oil-cooled electric machine system

Abstract

This utility model discloses a cooling and lubrication structure for an oil-cooled motor system, belonging to the field of oil-cooled motor system design. It addresses the problem that current technical solutions, with their numerous oil lines and pipes, increase the manufacturing difficulty of the motor and reducer housings. The device includes an oil pump, an oil pump passage, an oil cooler, and a main oil passage in the housing. It also includes an annular oil passage formed by assembling a conductive ring with the housing. This annular oil passage is located on the housing between the motor-side front bearing and the reducer input shaft-side bearing. The annular oil passage has a reducer-side outlet and a motor-side outlet. The reducer-side outlet is connected to the cavity containing the reducer input shaft-side bearing; the motor-side outlet is connected to the cavity containing the motor-side front bearing; and the main oil passage in the housing is connected to the annular oil passage. This cooling and lubrication structure integrates the oil passages that guide the oil to the motor-side front bearing and the reducer input shaft bearing into a single annular oil passage, reducing the number of oil lines, enhancing lubrication, and lowering the manufacturing difficulty of the housing.

Description

Technical Field

[0001] This utility model relates to the field of oil-cooled motor system design, and specifically to a cooling and lubrication structure for an oil-cooled motor system. Background Technology

[0002] Compared to common oil-cooled motor system designs, the industry has proposed various solutions for the cooling and lubrication of motor systems. The design of cooling and lubrication oil passages for reducers and motors mostly adopts a multi-stage oil passage guided lubrication design. Currently, most oil-cooled motor system cooling and lubrication designs on the market involve multiple sets of oil passages guiding bearings and other lubrication components. Oil is drawn in by an oil pump and transferred from multiple oil passages to each lubrication component. Multiple sets of oil passages need to be pre-installed on the housing to achieve the cooling and lubrication of the entire oil-cooling system.

[0003] The current technical solution involves multiple sets of oil passages, requiring the housing to retain multiple sets of oil passage features to transfer oil to the front bearing on the motor side and the input shaft bearing and output shaft bearing of the reducer. The large number of oil passages increases the manufacturing difficulty of the motor and reducer housing. Utility Model Content

[0004] The purpose of this utility model is to provide a cooling and lubrication structure for an oil-cooled motor system, aiming to overcome the defects of the prior art and solve the problem that the increased number of oil pipelines in the current technical solutions makes the manufacturing difficulty of the motor and reducer housing more difficult.

[0005] Therefore, this utility model proposes a cooling and lubrication structure for an oil-cooled motor system, including an oil pump, an oil pump oil passage, an oil cooler, and a main oil passage in the housing, and further including: an annular oil passage formed by assembling a conductive ring with the housing; the annular oil passage is located outside the conductive ring and is disposed on the housing between the motor-side front bearing and the reducer input shaft-side bearing; the annular oil passage has a reducer-side outlet and a motor-side outlet; the reducer-side outlet is connected to the cavity where the reducer input shaft-side bearing is located; the motor-side outlet is connected to the cavity where the motor-side front bearing is located; the main oil passage in the housing is connected to the annular oil passage.

[0006] As a preferred technical solution of this application, the oil flow path is as follows: oil pump → oil pump oil passage → oil cooler → main oil passage of housing → annular oil passage → simultaneously lubricates the reducer input shaft bearing via the reducer side outlet and lubricates the motor side front bearing via the motor side outlet → finally flows back to the bottom of housing.

[0007] As a preferred embodiment of this application, the oil pump is connected to the inlet of the oil cooler through an oil pump passage, and the outlet of the oil cooler is connected to the main oil passage of the housing through an internal oil passage.

[0008] As a preferred embodiment of this application, the annular oil passage is arranged circumferentially around the conductive ring.

[0009] As a preferred technical solution of this application, the reducer-side outlet and the motor-side outlet are arranged at circumferential intervals along the annular oil passage.

[0010] As a preferred technical solution of this application, the annular oil passage is a single, continuous annular channel.

[0011] As a preferred technical solution of this application, the oil pump and the oil cooler are connected to an external oil supply pipe.

[0012] The cooling and lubrication structure for an oil-cooled motor system provided by this utility model addresses the shortcomings of existing technologies by integrating the oil passages of the motor-side front bearing and the reducer input shaft bearing into a single annular oil passage. This allows the oil to be guided to both the motor-side front bearing and the reducer input shaft bearing simultaneously, reducing the number of oil pipes, enhancing lubrication, and lowering the difficulty of housing manufacturing. This cooling and lubrication structure has a simple layout, reduces the number of guide oil passages, and enhances lubrication. The housing is more manufacturable, requiring no special angle oil passage machining. The overall oil cooling system design is also simpler.

[0013] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a three-dimensional structural diagram of the cooling and lubrication structure for an oil-cooled motor system according to the present invention.

[0016] Figure 2 This is a left view of the cooling and lubrication structure for an oil-cooled motor system according to this utility model;

[0017] Figure 3 This is a cross-sectional view along line AA of the cooling and lubrication structure for an oil-cooled motor system according to this utility model.

[0018] Figure 4 This is a top view of the cooling and lubrication structure for an oil-cooled motor system according to the present invention;

[0019] Figure 5 This is a BB-direction sectional view of the cooling and lubrication structure for an oil-cooled motor system according to this utility model;

[0020] Figure 6This is a partial enlarged view of point C of the cooling and lubrication structure for an oil-cooled motor system of this utility model;

[0021] Explanation of reference numerals in the attached drawings: 1. Bearing on the input shaft side of the reducer; 2. Oil cooler; 3. Oil pump oil passage; 4. Oil pump; 6. Main oil passage of the housing; 7. Motor side outlet; 8. Annular oil passage; 9. Front bearing on the motor side; 10. Reducer side outlet; 11. Conductive ring. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-6 As shown, the cooling and lubrication structure for an oil-cooled motor system of this utility model includes: an oil pump 4, an oil pump oil passage 3, an oil cooler 2, and a main oil passage 6, an annular oil passage 8, and an annular oil passage outlet disposed on the housing. The main oil passage 6 and the annular oil passage 8 are connected. The oil pump 4 is connected to the oil cooler 2 through the oil pump oil passage 3. The oil cooler 2 transmits oil to the annular oil passage 8 through the internal oil passage and the main oil passage 6.

[0024] The annular oil channel 8 is formed by assembling the conductive ring 11 with the shell. The annular oil channel 8 is located outside the conductive ring 11 and is arranged around the circumference of the conductive ring 11. The annular oil channel 8 is a single, continuous annular channel.

[0025] The annular oil passage 8 is located on the housing between the front bearing 9 on the motor side and the bearing 1 on the input shaft side of the reducer. The housing is also provided with a reducer-side outlet 10 and a motor-side outlet 7 that are connected to the annular oil passage 8. The reducer-side outlet 10 and the motor-side outlet 7 are arranged at intervals along the circumference of the annular oil passage 8.

[0026] The motor-side outlet 7 is connected to the cavity where the motor-side front bearing 9 is located, and the reducer-side outlet 10 is connected to the cavity where the reducer input shaft side bearing 1 is located. Oil flows out from the motor-side outlet 7 and the reducer-side outlet 10 of the annular oil passage 8 to lubricate the motor-side front bearing 9 and the reducer input shaft side bearing 1, respectively. Finally, the oil flows back to the bottom of the housing.

[0027] In this design, oil pump 4 is connected to the inlet of oil cooler 2 via oil pump passage 3, and the outlet of oil cooler 2 is connected to the main oil passage 6 of the housing via an internal oil passage. It should be noted that oil pump 4 can also be connected to oil cooler 2 via an external oil pipeline, eliminating oil pump passage 3 and allowing for structural optimization of the housing.

[0028] Therefore, the oil flow path of the cooling and lubrication structure for the oil-cooled motor system of this utility model is as follows: oil pump 4 → oil pump oil passage 3 → oil cooler 2 → main oil passage 6 of housing → annular oil passage 8 → simultaneously lubricates the reducer input shaft side bearing 1 via reducer side outlet 10 and lubricates the motor side front bearing 9 via motor side outlet 7 → finally flows back to the bottom of housing.

[0029] The working principle and process of the cooling and lubrication structure for oil-cooled motor systems of this utility model are briefly described below.

[0030] The oil inside the housing is transferred to the oil cooler 2 via the oil pump 4 and the oil pump passage 3. After being converted inside the oil cooler 2, it reaches the main oil passage 6 and the annular oil passage 8 and the annular oil passage outlet. Then, it is transferred to the reducer input shaft bearing 1 via the reducer side outlet 10 of the annular oil passage, and to the motor side front bearing 9 via the motor side outlet 7 of the annular oil passage. Finally, the oil flows back to the bottom of the housing.

[0031] Compared to common oil passage designs, the above-mentioned cooling and lubrication structure reduces one oil passage from the main oil passage of the housing to the bearing on the input shaft side of the reducer; the housing has better manufacturability, with no special angle oil passage machining; and the overall oil cooling system structure design is simpler.

[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cooling and lubrication structure for an oil-cooled motor system, comprising an oil pump (4), an oil pump oil passage (3), an oil cooler (2), and a housing main oil passage (6), characterized in that, Also includes: An annular oil passage (8) is formed by assembling a conductive ring (11) with a housing; the annular oil passage (8) is located outside the conductive ring (11) and is disposed on the housing between the motor-side front bearing (9) and the reducer input shaft-side bearing (1); the annular oil passage (8) is provided with a reducer-side outlet (10) and a motor-side outlet (7). The reducer-side outlet (10) is connected to the cavity where the reducer input shaft side bearing (1) is located; the motor-side outlet (7) is connected to the cavity where the motor-side front bearing (9) is located; the housing main oil passage (6) is connected to the annular oil passage (8).

2. The cooling and lubrication structure for an oil-cooled motor system according to claim 1, characterized in that, The oil flows through the following path: oil pump (4) → oil pump oil passage (3) → oil cooler (2) → main oil passage of housing (6) → annular oil passage (8) → simultaneously lubricates the reducer input shaft side bearing (1) via reducer side outlet (10) and lubricates the motor side front bearing (9) via motor side outlet (7) → finally flows back to the bottom of housing.

3. The cooling and lubrication structure for an oil-cooled motor system according to claim 1, characterized in that, The oil pump (4) is connected to the inlet of the oil cooler (2) through the oil pump oil passage (3), and the outlet of the oil cooler (2) is connected to the main oil passage of the housing (6) through the internal oil passage.

4. The cooling and lubrication structure for an oil-cooled motor system according to claim 1, characterized in that, The annular oil passage (8) is arranged circumferentially around the conductive ring (11).

5. The cooling and lubrication structure for an oil-cooled motor system according to claim 1, characterized in that, The reducer-side outlet (10) and the motor-side outlet (7) are arranged circumferentially along the annular oil passage (8).

6. The cooling and lubrication structure for an oil-cooled motor system according to claim 1, characterized in that, The annular oil passage (8) is a single, continuous annular channel.

7. The cooling and lubrication structure for an oil-cooled motor system according to claim 1, characterized in that, The oil pump (4) and the oil cooler (2) are connected to an external oil pipeline.

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