Intra-cavity oil suction pipeline for implementing oil cooling oil way for electric drive double-motor stator

Abstract

The utility model discloses an in-cavity oil suction pipeline for implementing an oil cooling oil way for an electrically driven double-motor stator, which comprises a settling section and an immersed tube section, the settling section is inclined from top to bottom, the upper end of the settling section is provided with a mounting seat, and the settling section is mounted on the inner wall of an electrically driven front shell through the mounting seat and is in butt joint with a port of the oil way; the immersed tube section is immersed below the liquid level of the lubricating oil, and the outer end of the immersed tube section is provided with an oil suction port. The periphery of the immersed tube section is sleeved with a cylindrical filter screen sleeve. One end of the filter screen sleeve is a closed end, the other end of the filter screen sleeve is a sleeve opening end, the sleeve opening end is arranged on the periphery of the immersed tube section in a sleeved mode, and the sleeve opening end of the filter screen sleeve is locked on the periphery of the immersed tube section through an annular lock sleeve. The device has the advantages that the installation height of the external oil pump can be increased as much as possible, installation of an electric driver in a vehicle body is facilitated, and normal oil suction of an oil cooling oil way can be guaranteed; the oil absorption requirement of large oil absorption quantity can be met; and stable installation of the oil suction pipeline can be ensured.

Description

Technical Field

[0001] The utility model relates to an intracavity oil suction pipeline for implementing an oil cooling oil circuit for an electric drive dual motor stator, belonging to the technical field of electric drive cooling. Background Art

[0002] In the development of new energy electrification, heavy-duty commercial vehicles have to ensure uninterrupted shifting power and integrated lightweighting as the main trend. Therefore, heavy-duty commercial vehicle electric drive products generally use dual motors. In consideration of lightweighting, high-speed motors are further used. Under the same power condition, the motor torque can be reduced, thereby reducing the size of the motor and achieving lightweighting.

[0003] When a high-speed motor is running at high speed, the magnetic flux distribution inside the motor becomes uneven. Since the current generates different magnetic fields in different areas, the iron core generates more eddy current losses in these areas, which are converted into heat energy, causing the motor temperature to rise. If the heat is not dissipated in time, the entire motor will continue to rise through heat conduction. At the same time, the increase in winding temperature will increase the resistance of the copper material, which in turn causes the resistance to generate more heat. Therefore, temperature is an important factor affecting the operating efficiency and performance of the motor.

[0004] Traditional heavy-duty commercial trucks use water-cooled motor stators, which requires the addition of water sources and pipelines. This not only increases costs, but is also contrary to miniaturization and lightweighting.

[0005] In order to solve the above problems, the applicant filed a patent application on the same day for an oil circuit structure for oil cooling the stators of dual motors using lubricating oil in the electric drive cavity.

[0006] The present application aims to provide a device for sucking lubricating oil in the housing cavity of an electric drive to solve the above-mentioned problem. The device involves the following problems:

[0007] 1. Regarding the installation height of the external oil pump, it is required that when the oil pump is started, the lubricating oil level in the electric drive cavity should be at least not lower than the oil pump, so that the oil pump has lubricating oil that is uninterruptedly connected to the lubricating oil in the cavity. Under this premise, the installation height of the oil pump should be as high as possible to facilitate the installation of the electric drive in the vehicle body. This requires that the oil suction pipeline can continue to absorb oil after the lubricating oil level in the cavity is lowered when the oil pump is started;

[0008] 2. The oil circuit for oil cooling of dual motors has a large oil suction capacity, requiring the oil suction pipeline to be able to suck in sufficient lubricating oil;

[0009] 3. The electric drive has large vibrations, and the lubricating oil in the cavity is stirred at high speed by the gears, requiring the oil suction pipeline to be installed firmly.

[0010] In order to solve the above problems more specifically, we conducted relevant patent searches, but did not obtain any patent documents that are strongly related to this application. Utility Model Content

[0011] The technical problem to be solved by the utility model is: how to provide a satisfactory oil suction device located in the electric drive cavity for an oil circuit structure which utilizes the electric drive's own lubricating oil resources to transport cooling oil to the stators of two motors.

[0012] In view of the above problems, the technical solution proposed by the utility model is:

[0013] An intracavity oil suction pipeline for implementing an oil-cooling oil circuit for an electrically driven dual-motor stator comprises a sedimentation section and a sinking tube section. The sedimentation section is inclined from top to bottom, and has a mounting seat at the upper end. The mounting seat is mounted on the inner wall of the front housing of the electrically driven motor and docked with the port of the oil circuit. The lower end is connected to the sinking tube section below the lubricating oil level. The sinking tube section is immersed below the lubricating oil level, and has an oil suction port at its outer end.

[0014] Furthermore, the outer periphery of the immersed tube section is covered with a cylindrical filter mesh sleeve.

[0015] Furthermore, one end of the filter mesh sleeve is a closed end, and the other end is a sleeve end, the sleeve end is sleeved on the outer periphery of the immersed tube section, and the sleeve end of the filter mesh sleeve is locked on the outer periphery of the immersed tube section by an annular locking sleeve.

[0016] Furthermore, the inner diameter of the filter mesh sleeve is larger than the outer diameter of the immersed tube section, a circumferentially outwardly protruding gasket edge is provided on the outer periphery of the immersed tube section, and the sleeve end of the filter mesh sleeve is sleeved on the outer periphery of the gasket edge.

[0017] Furthermore, both sides of the closed end of the filter mesh sleeve are closed with inclined surfaces.

[0018] Furthermore, the oil suction port of the immersed tube section is a bevel port. Beneficial Effects

[0019] 1. The installation height of the external oil pump can be increased as much as possible, which is convenient for the installation of the electric drive in the vehicle body and can ensure the normal oil suction for the oil cooling circuit;

[0020] 2. Able to meet the oil absorption requirements of large oil absorption volume;

[0021] 3. It can ensure that the oil suction pipeline is installed firmly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the electric drive front housing portion;

[0023] Figure 2 A three-dimensional schematic diagram of a filter screen sleeve being installed on the immersed tube section;

[0024] Figure 3 It is a cross-sectional schematic diagram of a immersed tube section equipped with a filter screen.

[0025] In the figure: 1, sedimentation section; 2, sinking tube section; 201, oil suction port; 202, gasket edge; 3, mounting seat; 4, filter mesh sleeve; 401, closed end; 402, sleeve end; 5, annular locking sleeve; 6, oil gap; 7, oil circuit; 8, oil pump; 100, electric drive. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] like Figure 1 —3 shows an intracavity oil suction pipeline for implementing oil cooling for the stator of an electric drive dual motor, comprising a settling section 1 and a sinking tube section 2. The settling section 1 is inclined from top to bottom, and has a mounting seat 3 at the upper end, which is mounted on the inner wall of the front housing of the electric drive 100 and docked with the port of the oil circuit 7 through the mounting seat 3, and the lower end is connected to the sinking tube section 2 below the lubricating oil level. The sinking tube section 2 is immersed below the lubricating oil level, and has an oil suction port 201 at its outer end. In this way, the setting of the settling section 1 eliminates the need to set the oil pump 8 at a position too low close to the bottom of the electric drive 100 to avoid interference when the electric drive is installed on a vehicle. At the same time, the setting of the sinking tube section 2 facilitates the subsequent setting of a filter component on the sinking tube section 2.

[0028] The outer periphery of the above-mentioned immersed tube section 2 is covered with a cylindrical filter mesh sleeve 4. One end of the filter mesh sleeve 4 is a closed end 401, and the other end is a sleeve end 402, which is sleeved on the outer periphery of the immersed tube section 2, and the sleeve end 402 of the filter mesh sleeve 4 is locked on the outer periphery of the immersed tube section 2 by an annular locking sleeve 5, so that the filter mesh sleeve 4 is firmly fixed.

[0029] In order to allow a large amount of lubricating oil to enter, the inner diameter of the filter mesh sleeve 4 is larger than the outer diameter of the immersed tube section 2, so that an oil gap 6 is formed between the filter mesh sleeve 4 and the outer periphery of the immersed tube section 2. In order to facilitate installation, a circumferentially outwardly convex gasket edge 202 is provided on the outer periphery of the immersed tube section 2, and the sleeve end 402 of the filter mesh sleeve 4 is sleeved on the outer periphery of the gasket edge 202.

[0030] The closed end 401 of the filter mesh sleeve 4 is closed with inclined surfaces on both sides, which is conducive to pinching and closing the closed end 401 of the filter mesh sleeve 4 during processing.

[0031] The oil suction port 201 of the immersed tube section 2 is a beveled port, which can also increase the inlet of lubricating oil.

[0032] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.

Claims

1. An oil suction pipeline in the cavity for implementing an oil cooling circuit for an electrically driven dual motor stator, characterized in that: The invention comprises a settling section (1) and a sinking tube section (2), wherein the settling section (1) is inclined from top to bottom, and has a mounting seat (3) at the upper end, and is mounted on the inner wall of the front housing of the electric drive (100) through the mounting seat (3) to dock with the port of the oil circuit (7), and the lower end is connected to the sinking tube section (2) below the lubricating oil level, and the sinking tube section (2) is immersed below the lubricating oil level, and has an oil suction port (201) at the outer end.

2. The intracavity oil suction pipeline for implementing oil cooling circuit for stator of electric drive dual motor according to claim 1 is characterized in that: The outer circumference of the immersed tube section (2) is covered with a cylindrical filter mesh sleeve (4).

3. The intracavity oil suction pipeline for implementing oil cooling circuit for stator of electric drive dual motor according to claim 2 is characterized in that: One end of the filter mesh sleeve (4) is a closed end, and the other end is a sleeve end (402), the sleeve end (402) is sleeved on the outer circumference of the immersed tube section (2), and the sleeve end (402) of the filter mesh sleeve (4) is locked on the outer circumference of the immersed tube section (2) by an annular locking sleeve (5).

4. The intracavity oil suction pipeline for implementing oil cooling circuit for stators of electric drive dual motors according to claim 3 is characterized in that: The inner diameter of the filter mesh sleeve (4) is greater than the outer diameter of the immersed tube section (2); a circumferentially outwardly convex gasket edge (202) is provided on the outer periphery of the immersed tube section (2); and the sleeve end (402) of the filter mesh sleeve (4) is sleeved on the outer periphery of the gasket edge (202).

5. The intracavity oil suction pipeline for implementing oil cooling circuit for stators of electric drive dual motors according to claim 4 is characterized in that: The closed end (401) of the filter mesh sleeve (4) is closed with inclined surfaces on both sides.

6. The intracavity oil suction pipeline for implementing oil cooling for the stator of the electric drive dual motor according to claim 5 is characterized in that: The oil suction port (201) of the immersed tube section (2) is a bevel port.

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