Lubricating structure of new energy automobile speed reducer

Abstract

A lubricating structure of a new energy automobile speed reducer comprises a first box body, a second box body, a differential mechanism and an oil pump, the differential mechanism is installed in the first box body and the second box body, the differential mechanism is fixedly connected with a differential lock, the oil pump is installed in the first box body, the lubricating structure further comprises oil pipes, and the oil pipes comprise the first oil pipe, the second oil pipe, the third oil pipe and the fourth oil pipe. An oil inlet of the first oil pipe is communicated with the oil pump, an oil hole a is formed in the oil inlet of the first oil pipe in the radial direction, an oil hole b is formed in the oil outlet of the second oil pipe in the radial direction, the second oil pipe and the third oil pipe are installed on the inner wall of the first box body and arranged around the circumferential face of a differential bearing hole, and a plurality of oil holes c are formed in the third oil pipe in the radial direction. The fourth oil pipe extends into the second box body, an oil hole d is formed in an oil inlet of the fourth oil pipe, an oil hole e is formed in the middle of the fourth oil pipe, and an oil hole f is formed in an oil outlet of the fourth oil pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and in particular relates to a lubrication structure of a speed reducer for a new energy automobile. Background Art

[0002] With the rapid development of new energy vehicle technology, energy saving, miniaturization, economy and light weight have become the development direction of the industry. Four-wheel drive models have efficient transmission capabilities, and differential locks are their core components, and their performance parameters are required to be higher. Among them, sufficient lubrication capacity is the key guarantee for the differential lock to realize its function.

[0003] The electric drive system is the core component system of the electric vehicle, responsible for driving, control, calculation, signal conversion, communication processing and other functions. It distributes power in real time and coordinates the energy flow between various components according to the driver's intention and driving conditions to improve the power, safety, efficiency and comfort of the vehicle. The reducer is very sensitive to the amount of lubricating oil, and requires sufficient lubricating oil to maintain the transmission efficiency. Therefore, the current common solution is to set oil circuits, oil grooves, oil guide ribs, etc. on the reducer housing, and set oil delivery holes and other structures on the transmission shaft to accurately deliver the lubricating oil to the lubrication position. However, this requires many straight holes to be opened on the reducer housing and the transmission shaft to lubricate in place, and the reducer housing is irregular in shape. After opening several straight holes on the housing wall to the lubrication position, the unnecessary holes must be blocked. Once the blocking is not in place, oil leakage will occur, and the operation is complicated, which greatly increases the labor time. Therefore, energy-saving and efficient lubrication methods are particularly necessary for the auxiliary lubrication of differential locks integrated into the electric drive system. Summary of the invention

[0004] The purpose of the utility model is to propose a lubrication structure for a differential lock of a new energy vehicle in response to the problems existing in the prior art. An oil pipe is installed on the inner wall of a first housing, and a plurality of oil holes are radially arranged on the wall of the oil pipe, so that the lubricating oil can be accurately delivered to various places in the reduction box, the differential, and the differential lock for active lubrication, thereby avoiding the problem of insufficient lubrication of the differential lock of the new energy vehicle. Compared with the prior art method of relying on the thickness of the housing wall to open a plurality of oil holes, the structure is simpler, the operation is easier, and the oil supply is more accurate.

[0005] The purpose of the utility model is achieved in this way.

[0006] A lubrication structure for a differential lock of a new energy vehicle comprises a first housing, a second housing, a differential, and an oil pump, wherein the differential is installed in the first housing and the second housing, the differential is fixedly connected to the differential lock, the oil pump is installed in the first housing, and further comprises oil pipes, wherein the oil pipes comprise a first oil pipe, a second oil pipe, a third oil pipe, and a fourth oil pipe, the oil inlet of the first oil pipe is connected to the oil outlet of the oil pump, an oil hole a is radially arranged at the oil inlet of the first oil pipe, the oil hole a is opened near the differential lock, the oil outlet of the first oil pipe is fixedly connected to the oil inlet of the second oil pipe, the oil outlet of the second oil pipe is fixedly connected to the oil inlets of the third oil pipe and the fourth oil pipe Next, an oil hole b is radially arranged at the oil outlet of the second oil pipe, and the oil hole b is close to the main reduction gear of the differential. The second oil pipe and the third oil pipe are installed on the inner wall of the first housing and are arranged around the circumferential surface of the differential bearing hole. The third oil pipe is radially arranged with a plurality of oil holes c, and the oil hole c is aligned with the window of the differential housing. The fourth oil pipe extends toward the inside of the second housing, and an oil hole d is arranged at the oil inlet of the fourth oil pipe, and the oil hole d is close to the left bearing of the intermediate shaft. An oil hole e is arranged in the middle of the fourth oil pipe, and the oil hole e is close to the intermediate shaft and the main reduction gear of the differential. An oil hole f is arranged at the oil outlet of the fourth oil pipe, and the oil hole f is close to the right bearing of the intermediate shaft.

[0007] Furthermore, the third oil pipe includes a straight oil pipe and a bent oil pipe, the diameter of the bent oil pipe is smaller than the diameter of the straight oil pipe, and the straight oil pipe and the bent oil pipe are fixed by clamping.

[0008] Furthermore, the bent oil pipe is made of PA66GF30.

[0009] Furthermore, the straight oil pipe, the first oil pipe, the second oil pipe and the fourth oil pipe are made of 1215 steel.

[0010] Furthermore, the first oil pipe is connected to the oil pump through an oil hole in the first box wall, and the oil hole is provided with a branch oil hole, and the branch oil hole extends to a left bearing close to the motor output shaft.

[0011] Furthermore, end surfaces of the oil outlets of the second oil pipe and the third oil pipe are provided with plugs.

[0012] By adopting the above scheme, the lubrication structure of the new energy vehicle reducer of the utility model has a simple structure, multiple oil supply positions, more accurate oil supply, saves lubricating oil, and utilizes the gap inside the box without occupying other space, thereby improving the problem of insufficient lubrication of the differential lock of the new energy vehicle.

[0013] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is an assembly drawing of the utility model.

[0015] Figure 2 for Figure 1 AA section view.

[0016] Figure 3 This is a diagram of the internal structure of the first box body and the second box body of the utility model.

[0017] Explanation of the accompanying drawings: first case body 1, second case body 2, differential 3, differential lock 4, oil hole a51, oil hole b52, oil hole c53, oil hole d54, oil hole e55, oil hole f56, oil pump 6, differential bearing hole 7, main reduction gear 8, oil pipe 9, first oil pipe 91, second oil pipe 92, third oil pipe 93, fourth oil pipe 94, intermediate shaft 10, straight oil pipe 11, curved oil pipe 12, motor output shaft 13. DETAILED DESCRIPTION

[0018] See also Figures 1 to 3 A lubrication structure of a differential lock for a new energy vehicle comprises a first housing 1, a second housing 2, a differential 3, and an oil pump 6. The first housing 1 and the second housing 2 are folded together to form a complete housing. The differential 3 is installed in the first housing 1 and the second housing 2. The differential 3 is fixedly connected to the differential lock 4. The oil pump 6 is installed in the first housing 1. The oil pump 6 is fixedly connected to the oil suction filter. It also comprises an oil pipe 9, which comprises a first oil pipe 91, a second oil pipe 92, a third oil pipe 93, and a fourth oil pipe 94. The oil inlet of the first oil pipe 91 is connected to the oil outlet of the oil pump 6. An oil hole a51 is radially arranged at the oil inlet of the first oil pipe 91. The oil hole a51 is close to the window of the differential lock 4. The oil hole a51 can accurately supply oil to the window of the differential lock 4.

[0019] The oil outlet of the first oil pipe 91 is fixedly connected to the oil inlet of the second oil pipe 92, and the oil outlet of the second oil pipe 92 is fixedly connected to the oil inlets of the third oil pipe 93 and the fourth oil pipe 94. In this embodiment, the first oil pipe 91 and the second oil pipe 92, the second oil pipe 92 and the third oil pipe 93 and the fourth oil pipe 94 are fixed by welding.

[0020] An oil hole b52 is radially arranged at the oil outlet of the second oil pipe 92 . The oil hole b52 is close to the main reduction gear 8 of the differential 3 . The oil hole b52 can accurately supply oil to the main reduction gear 8 of the differential 3 .

[0021] The second oil pipe 92 and the third oil pipe 93 are installed on the inner wall of the first housing 1 and arranged around the circumferential surface of the differential bearing hole 7. The third oil pipe 93 is radially provided with a plurality of oil holes c53, and the oil holes c53 are aligned with the differential 3 housing opening. The advantage of being arranged around the circumferential surface of the differential bearing hole 7 is that the oil supply to the differential 3 is more sufficient and more accurate, and the plurality of oil holes c53 can meet the oil quantity demand of the differential 3. Further, the third oil pipe 93 includes a straight oil pipe 11 and a curved oil pipe 12, and the diameter of the curved oil pipe 12 is smaller than the diameter of the straight oil pipe 11, so that the curved oil pipe 12 occupies a smaller space. In this embodiment, the straight oil pipe 11 and the curved oil pipe 12 are fixed by clamping. Furthermore, the material of the curved oil pipe 12 is PA66GF30, and the use of this material makes the curved oil pipe 12 lighter.

[0022] The fourth oil pipe 94 extends to the inside of the second housing 2, and the oil inlet of the fourth oil pipe 94 is provided with an oil hole d54, and the oil hole d54 is close to the left bearing of the intermediate shaft 10, and the oil hole d54 can accurately supply oil to the left bearing of the intermediate shaft 10; the middle part of the fourth oil pipe 94 is provided with an oil hole e55, and the oil hole e55 is close to the intermediate shaft 10 and the main reduction gear 8 of the differential 3, and the oil hole e55 can accurately supply oil to the intermediate shaft 10 and the main reduction gear 8 of the differential 3; the oil outlet of the fourth oil pipe 94 is provided with an oil hole f56, and the oil hole f56 is close to the right bearing of the intermediate shaft 10, and the oil hole f56 can accurately supply oil to the right bearing of the intermediate shaft 10. Furthermore, the material of the straight oil pipe 11, the first oil pipe 91, the second oil pipe 92, and the fourth oil pipe 94 is 1215, which has high strength, good cutting performance, and is an environmentally friendly material.

[0023] Furthermore, the first oil pipe 91 is connected to the oil pump 6 through the oil hole in the wall of the first box body 1. The oil hole is provided with a branch oil hole, and the branch oil hole extends to the left bearing near the motor output shaft 13. The branch oil hole can accurately supply oil to the motor output shaft 13.

[0024] Furthermore, the end faces of the oil outlets of the second oil pipe 92 and the third oil pipe 93 are provided with plugs. In the present embodiment, the plugs are made of PA66GF30.

[0025] The lubrication structure of the differential lock of a new energy vehicle of the utility model installs an oil pipe 9 on the inner wall of the first housing, and radially arranges a plurality of oil holes on the wall of each section of the oil pipe 9, so that the lubricating oil can be accurately delivered to the differential lock 4 opening, the differential 3, the main reduction gear 8 of the differential 3, the left and right bearings of the intermediate shaft 10, and various places in the differential lock 4 for active lubrication. Moreover, the internal gap of the housing is utilized without occupying external space, and the integration is high, thus avoiding the problem of insufficient lubrication of the differential lock 4 of the new energy vehicle. Compared with the prior art method of opening a plurality of oil holes relying on the thickness of the housing wall, the structure is simpler, the operation is easier, and the oil supply is more accurate.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A lubrication structure for a new energy vehicle reducer, comprising a first housing (1), a second housing (2), a differential (3), and an oil pump (6), wherein the differential (3) is installed in the first housing (1) and the second housing (2), the differential (3) is fixedly connected to a differential lock (4), and the oil pump (6) is installed in the first housing (1), characterized in that: The invention also comprises an oil pipe (9), wherein the oil pipe (9) comprises a first oil pipe (91), a second oil pipe (92), a third oil pipe (93), and a fourth oil pipe (94); an oil inlet of the first oil pipe (91) is connected to an oil outlet of an oil pump (6); an oil hole a (51) is radially arranged at the oil inlet of the first oil pipe (91); the oil hole a (51) is opened near the differential lock (4); the oil outlet of the first oil pipe (91) is fixedly connected to the oil inlet of the second oil pipe (92); the oil outlet of the second oil pipe (92) is fixedly connected to the oil inlets of the third oil pipe (93) and the fourth oil pipe (94); an oil hole b (52) is radially arranged at the oil outlet of the second oil pipe (92); the oil hole b (52) is close to the main reduction gear (8) of the differential (3); the second oil pipe (92) ) and the third oil pipe (93) are installed on the inner wall of the first housing (1) and are arranged around the circumferential surface of the differential bearing hole (7). The third oil pipe (93) is radially provided with a plurality of oil holes c (53), and the oil holes c (53) are aligned with the window of the differential housing (3). The fourth oil pipe (94) extends into the interior of the second housing (2). The oil inlet of the fourth oil pipe (94) is provided with an oil hole d (54), and the oil hole d (54) is close to the left bearing of the intermediate shaft (10). The middle part of the fourth oil pipe (94) is provided with an oil hole e (55), and the oil hole e (55) is close to the intermediate shaft (10) and the main reduction gear (8) of the differential (3). The oil outlet of the fourth oil pipe (94) is provided with an oil hole f (56), and the oil hole f (56) is close to the right bearing of the intermediate shaft (10).

2. The lubrication structure of the new energy vehicle reducer according to claim 1 is characterized in that: The third oil pipe (93) comprises a straight oil pipe (11) and a bent oil pipe (12); the diameter of the bent oil pipe (12) is smaller than the diameter of the straight oil pipe (11); the straight oil pipe (11) and the bent oil pipe (12) are fixed by clamping.

3. The lubrication structure of the new energy vehicle reducer according to claim 2 is characterized in that: The bent oil pipe (12) is made of PA66GF30.

4. The lubrication structure of the new energy vehicle reducer according to claim 2 is characterized in that: The straight oil pipe (11), the first oil pipe (91), the second oil pipe (92), and the fourth oil pipe (94) are made of 1215 material.

5. The lubrication structure of the new energy vehicle reducer according to claim 1 is characterized in that: The first oil pipe (91) is connected to the oil pump (6) through an oil hole in the wall of the first housing (1), and the oil hole is provided with a branch oil hole, which extends to a left bearing close to the motor output shaft (13).

6. The lubrication structure of the new energy vehicle reducer according to claim 1 is characterized in that: The end surfaces of the oil outlets of the second oil pipe (92) and the third oil pipe (93) are provided with plugs.

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