Electric drive oil adding and discharging structure, electric drive and vehicle

Abstract

The utility model discloses an electric drive oil adding and discharging structure, an electric drive and a vehicle. The electric drive oil adding and discharging structure comprises a speed reducer shell, an oil level height pipe and a screw plug. An oil return area is designed on the lower left portion of the speed reducer shell, and an oil adding and discharging hole is formed in the bottom of the oil return area. The oil level height pipe is installed in the oil adding and discharging hole, and the upper end face of the oil level height pipe extends into the oil return area to be flush with the oil liquid level of the speed reducer shell. The screw plug is located below the oil level height pipe and connected with the oil adding and discharging hole in a threaded mode, and plugging and sealing are achieved. The oil return area provides enough installation space for the oil level height pipe, and interference with a transmission assembly can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile parts, and particularly relates to an electric drive oil filling structure, an electric drive and a vehicle. BACKGROUND

[0002] The mainstream electric drive of current new energy vehicles is mainly divided into oil-cooled electric drive and water-cooled electric drive, and both need to be filled with lubricating oil to ensure the cooling and lubrication of the transmission assembly. For the design of the electric drive oil filling hole, the main problems at present are: (1) considering the electric drive production line oil filling, vehicle factory oil filling convenience and after-sales oil filling operability, two or more oil filling holes are usually designed on the electric drive, which not only increases the cost of parts, but also brings additional plugging and sealing risks; (2) since the electric drive has the characteristic of compact transmission structure, the inner cavity of the entire electric drive shell is smaller than that of the traditional gearbox, and the installation space inside the reducer shell is limited after the shaft tooth is installed, if the oil level height pipe (i.e. lubrication limiting oil pipe) of the traditional transmission is directly used on the electric drive, there will be the problem of interference with the transmission assembly (such as input shaft assembly, intermediate shaft assembly and output shaft assembly) due to limited installation space, which is difficult to implement. SUMMARY

[0003] The utility model aims at providing an electric drive oil filling structure, an electric drive and a vehicle to provide sufficient installation space for the oil level height pipe and avoid interference with the transmission assembly.

[0004] In the first aspect, the utility model provides an electric drive oil filling structure, which comprises a reducer shell, an oil level height pipe and a screw plug, the lower left part of the reducer shell is designed with an oil return area, the bottom of the oil return area is provided with an oil filling hole (which can ensure that the residual oil amount is minimum when the electric drive is drained), the oil level height pipe is installed in the oil filling hole, and the upper end surface extends into the oil return area and is flush with the oil level of the reducer shell (to realize the oil filling mistake-proof function), and the screw plug is located below the oil level height pipe and is screwed with the oil filling hole to realize plugging and sealing.

[0005] Preferably, the oil filling hole is a stepped hole with a small upper end and a large lower end, and the lower end is provided with an internal thread; the oil level height pipe is inverted T-shaped, the outer wall of the large head part of the oil level height pipe is provided with an external thread, and a first internal hexagonal hole (used for tightening or dismounting during assembly) is formed in the center of the large head part; the large head part of the oil level height pipe is screwed with the lower end of the oil filling hole, and the upper end surface of the large head part of the oil level height pipe abuts against the stepped end surface of the oil filling hole. The stepped end surface of the oil filling hole is limited, and the internal and external threads are screwed, so that the connection is firm and reliable.

[0006] Preferably, the outer wall of the screw plug is provided with external threads, and a second internal hexagonal hole is formed in the center of the lower end of the screw plug (for tightening or disassembling during assembly), and the size of the second internal hexagonal hole is the same as that of the first internal hexagonal hole. When assembling the oil level pipe and the screw plug, the same size of internal hexagonal tool is used, without the need to change, improving the assembly efficiency.

[0007] Preferably, the external threads provided on the outer wall of the screw plug are tapered threads. By controlling the installation torque, the screw plug is sealed and matched with the reducer housing, without the need to increase a gasket between the reducer housing and the screw plug to achieve sealing, thereby reducing the cost.

[0008] Preferably, the tapered threads of the screw plug are pre-coated with sealing glue, and when the screw plug is tightened on the oil filling hole, the sealing glue is located between the threads, and the sealing effect is better.

[0009] Preferably, the reducer housing is further provided with an anti-splashing baffle for separating the oil return area from the transmission assembly installation area. When the gear in the transmission assembly installation area is in high-speed operation, the lubricating oil in a splashing state is blocked by the anti-splashing baffle, thereby avoiding the lubricating oil from directly contacting the oil level pipe and causing impact on the oil level pipe, and the oil level pipe is more stable.

[0010] Preferably, the anti-splashing baffle is conformal with part of the outer contour of the transmission assembly, and extends from the middle of the left side edge of the reducer housing to the right part of the lower side edge, thereby better separating the oil return area from the transmission assembly installation area and avoiding interference.

[0011] Preferably, the anti-splashing baffle is provided with a gap for lubricating oil to flow into the oil return area. When the gear is in high-speed operation, the lubricating oil splashed onto the anti-splashing baffle flows into the oil return area along the anti-splashing baffle through the gap, thereby avoiding accumulation of the lubricating oil.

[0012] In a second aspect, the utility model provides an electric drive, the electric drive comprises the electric drive oil filling structure.

[0013] In a third aspect, the utility model provides a vehicle, the vehicle comprises the electric drive.

[0014] The utility model discloses a left lower part of the reducer housing is designed as an oil return area, an oil filling hole is formed in the bottom of the oil return area, the oil filling hole is used for installing the oil level pipe, and the oil filling hole is sealed by a screw plug. The oil return area provides sufficient installation space for the oil level pipe, avoids interference between the oil level pipe and the transmission assembly, and oil filling and oil discharging share the oil filling hole, thereby reducing the sealing risk. The electric drive is very suitable for new energy vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is an electric drive oil filling structure schematic view in the utility model embodiment.

[0016] Fig. 2 It is the lateral partial sectional view of the electric drive oil adding structure in the embodiment of the utility model.

[0017] Fig. 3 It is the cooperation schematic view of the oil level height pipe, screw plug and oil adding hole in the electric drive oil adding structure in the embodiment of the utility model.

[0018] Fig. 4 It is the structural schematic view of the speed reducer shell in the embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to be able to more detailedly understand the characteristics and technical contents of the embodiment of the utility model, the implementation of the embodiment of the utility model is described in detail below, the attached drawings are only for reference, and are not used to limit the embodiment of the utility model.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used herein are only for the purpose of describing the embodiment of the utility model, and are not intended to limit the utility model.

[0021] In the following description, "some embodiments" are related to a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0022] As Figs. 1 to 4 The electric drive oil adding structure in the embodiment of the utility model, including speed reducer shell 1, oil level height pipe 2 and screw plug 3. The lower left part of speed reducer shell 1 is designed with oil return area, and the bottom of oil return area is provided with oil adding hole 11. Oil level height pipe 2 is installed in oil adding hole 11, and the upper end surface of oil level height pipe 2 extends into oil return area and is flush with the oil level height of speed reducer shell 1. Screw plug 3 is located below oil level height pipe 2 and is screwed with oil adding hole 11 to realize plugging and sealing.

[0023] In some embodiments, oil adding hole 11 is a stepped hole with small upper end and large lower end, and the lower end is provided with internal thread. Oil level height pipe 2 is inverted T-shaped, and the outer wall of the large head part of oil level height pipe 2 is provided with external thread, and the center of the large head part is provided with first internal hexagonal hole 21 (through hole). The large head part of oil level height pipe 2 is screwed with the lower end of oil adding hole 11, and the upper end surface of the large head part of oil level height pipe 2 abuts against the stepped end surface of oil adding hole 11. The stepped end surface of oil adding hole 11 is limited, and the internal and external threads are screwed, so that the connection is firm and reliable.

[0024] In some embodiments, the outer wall of the screw plug 3 is provided with external threads. A second inner hexagonal hole 31 (blind hole) is formed in the center of the lower end of the screw plug 3, and the size of the second inner hexagonal hole 31 is the same as that of the first inner hexagonal hole 21. When assembling the oil level pipe 2 and the screw plug 3, the same size of inner hexagonal tool is used, without the need to change, which can improve the assembly efficiency.

[0025] In some embodiments, the external threads provided on the outer wall of the screw plug 3 are tapered threads. By controlling the installation torque, the screw plug 3 and the reducer housing 1 are sealed and matched, without the need to add a gasket between the reducer housing 1 and the screw plug 3 to achieve sealing.

[0026] In some embodiments, the tapered threads of the screw plug 3 are pre-coated with sealant, but the first and second circles at the small end of the screw plug 3 are not coated with sealant (to avoid too much sealant). When the screw plug 3 is tightened on the oil filling hole 11, the sealant is located between the threads, and the sealing effect is better.

[0027] In some embodiments, the reducer housing 1 is further provided with a splash-proof baffle 4 for separating the oil return area from the transmission assembly installation area. The splash-proof baffle 4 is shaped with part of the outer contour of the transmission assembly, and extends from the middle of the left side edge of the reducer housing 1 to the right part of the lower side edge. When the gears in the transmission assembly installation area are running at high speed, the lubricating oil in the splashing state is blocked by the splash-proof baffle 4, avoiding the lubricating oil from directly contacting the oil level pipe 2 and causing impact on the oil level pipe 2, and the oil level pipe 2 is more stable.

[0028] In some embodiments, the splash-proof baffle 4 is provided with a gap 41 for lubricating oil to flow into the oil return area. When the gears are running at high speed, the lubricating oil splashed onto the splash-proof baffle 4 flows into the oil return area along the splash-proof baffle 4 through the gap 41, avoiding the accumulation of lubricating oil.

[0029] The utility model embodiment further provides an electric drive, the electric drive includes above-mentioned electric drive oil filling structure.

[0030] The utility model embodiment further provides a vehicle, the vehicle includes above-mentioned electric drive.

[0031] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model.

Claims

1. An electric drive oil drain structure comprising a reducer housing (1), an oil level height pipe (2) and a screw plug (3); characterized in that: The lower left part of the speed reducer shell (1) is designed with an oil return area, and an oil filling hole (11) is arranged at the bottom of the oil return area; the oil level pipe (2) is installed in the oil filling hole (11), and the upper end surface extends into the oil return area and is flush with the oil level of the speed reducer shell (1); the screw plug (3) is located below the oil level pipe (2) and is screwed with the oil filling hole (11).

2. The electrically driven oil discharge structure according to claim 1, characterized by: The oil filling hole (11) is a stepped hole with small upper part and large lower part, and the lower end part is provided with internal threads; the oil level pipe (2) is inverted T-shaped, the outer wall of the large head part of the oil level pipe (2) is provided with external threads, and a first internal hexagonal hole (21) is arranged at the center of the large head part; the large head part of the oil level pipe (2) is screwed with the lower end part of the oil filling hole (11), and the upper end surface of the large head part of the oil level pipe (2) abuts against the stepped end surface of the oil filling hole (11).

3. The electrically driven oil discharge structure according to claim 2, characterized by: The outer wall of the screw plug (3) is provided with external threads, and a second internal hexagonal hole (31) is arranged at the center of the lower end part of the screw plug (3), and the size of the second internal hexagonal hole (31) is the same as that of the first internal hexagonal hole (21).

4. The electrically driven oil discharge structure according to claim 3, characterized by: The external threads arranged on the outer wall of the screw plug (3) are tapered threads.

5. The electrically driven oil discharge structure according to claim 4, characterized in that: The tapered threads of the screw plug (3) are pre-coated with sealing glue.

6. The electrically driven oil discharge structure according to any one of claims 1 to 5, characterized by: The speed reducer shell (1) is further provided with a splash-proof baffle (4) for separating the oil return area from the transmission assembly installation area.

7. The electrically driven oil discharge structure according to claim 6, characterized in that: The splash-proof baffle (4) is conformal with part of the outer contour of the transmission assembly, and extends from the middle of the left side edge of the speed reducer shell (1) to the right part of the lower side edge.

8. The electrically driven oil discharge structure according to claim 7, characterized by: The splash-proof baffle (4) is provided with a gap (41) for lubricating oil to flow into the oil return area.

9. An electric drive, characterized by The electric drive oil filling structure comprises the electric drive oil filling structure according to any one of claims 1 to 8.

10. A vehicle characterized by: The electric drive comprises the electric drive according to claim 9.

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