Electric drive axle transmission assembly with better lubricating effect and electric drive axle assembly

Abstract

The utility model relates to an electric drive axle transmission assembly with a better lubricating effect and an electric drive axle assembly, belongs to the technical field of electric drive axle systems, and solves the technical problem that the lubricating effect in a differential mechanism is poorer due to the fact that the amount of lubricating oil entering the differential mechanism is small when an existing electric vehicle runs. The electric drive axle transmission assembly comprises a speed reducer which is provided with a shell and a gear transmission pair, and the gear transmission pair comprises a planetary gear mechanism with a gear ring; the differential mechanism is installed in an axle housing of the electric drive axle and connected with the half axle, the gear transmission pair is in transmission connection between the differential mechanism and the motor, the differential mechanism is located on the inner side of the gear ring, and a shell of the differential mechanism is provided with an oil inlet; and the oil blocking piece is installed in the axle housing of the electric drive axle and located above the oil inlet of the differential mechanism, and the oil blocking piece is used for collecting part of the lubricating oil thrown up by the gear ring and guiding the collected lubricating oil to the oil inlet of the differential mechanism, so that more lubricating oil enters the differential mechanism, and the internal structure of the differential mechanism is better lubricated.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric drive axle systems, and in particular relates to an electric drive axle transmission component and an electric drive axle assembly with better lubrication effect. Background Art

[0002] The electric drive axle transmission assembly is used to transmit the rotation output by the motor to the half-axle connected to the wheel end. The assembly mainly includes a reducer and a differential. The half-axle and the differential are installed on the electric drive axle housing. The above-mentioned reducer also has a housing and a gear transmission pair arranged in the housing. The reducer housing is connected to the electric drive axle housing.

[0003] Usually, the electric drive axle housing is provided with a refueling port for injecting lubricating oil into the electric drive axle housing. In a stationary state, the lubricating oil settles at the bottom of the electric drive axle housing. When the motor is running and drives the reducer, differential and half-axle to rotate, the gear transmission pair in the reducer will roll up the lubricating oil and allow it to enter the reducer housing and the inside of the differential, thereby lubricating the components in the reducer housing and the components in the differential housing. Specifically, the gear transmission pair of the reducer includes a planetary gear mechanism. When the gear ring of the planetary gear mechanism rotates, the lubricating oil at the bottom of the electric drive axle housing is rolled up, and part of the rolled up lubricating oil is thrown into the reducer housing, and part of the lubricating oil is thrown into the inside of the differential.

[0004] However, the amount of lubricating oil that actually enters the differential is very small, and most of the lubricating oil circulates inside the electric drive axle housing. The reason is that the swung lubricating oil has centrifugal force. Under the action of centrifugal force, most of the lubricating oil hits the inner wall of the electric drive axle housing. Although a large opening for oil inlet is provided on one side of the differential housing, the lubricating oil that hits the inner wall of the electric drive axle housing has a strong randomness when falling downward, so the swung lubricating oil is very dispersed inside the electric drive axle housing. Therefore, only a small amount of swung lubricating oil can enter the differential from the large opening of the differential housing. When the vehicle is running, the small amount of lubricating oil that enters the differential housing has limited lubrication effect on the internal structure of the differential, especially when the vehicle is driving at low speed, the lubricating oil that enters the differential is even less, and differential ablation and other problems are prone to occur. Utility Model Content

[0005] The utility model provides an electric drive axle transmission component with better lubrication effect, which is used to solve the technical problem that when the existing electric vehicle is running, the amount of lubricating oil entering the differential is small, resulting in poor lubrication effect inside the differential.

[0006] The utility model is realized by the following technical scheme: an electric drive axle transmission assembly with better lubrication effect, comprising:

[0007] A reducer having a housing and a gear transmission pair installed in the housing, wherein the gear transmission pair includes a planetary gear mechanism having a gear ring;

[0008] A differential is installed in the electric drive axle housing and connected to the half shaft, the gear transmission pair is transmission-connected between the differential and the motor, the differential is located on the inner side of the gear ring, and the housing of the differential has an oil inlet;

[0009] An oil baffle is installed in the electric drive axle housing and is located above the oil inlet of the differential. The oil baffle is used to collect part of the lubricating oil thrown up by the gear ring and guide the collected lubricating oil to the oil inlet of the differential.

[0010] Furthermore, in order to better realize the utility model, a docking port for docking with the electric drive axle housing is provided on one side of the reducer housing, the differential and the gear ring are both accommodated in the docking port, and the oil baffle is connected to the outer side wall of the docking port.

[0011] Furthermore, in order to better implement the present utility model, the oil blocking member includes:

[0012] A connecting plate connected to the outer side wall of the docking port through a connecting piece;

[0013] An oil guide groove is fixedly connected to the bottom end of the connecting plate, the oil guide groove is placed on the side of the gear ring and above the oil inlet of the differential, and the oil guide groove is used to collect part of the lubricating oil thrown up by the gear ring and guide the collected lubricating oil to the oil inlet of the differential.

[0014] Furthermore, in order to better implement the present invention, the connecting piece is a bolt, a screw hole is provided on the outer side wall of the docking port, a through hole is provided on the connecting plate, and the bolt passes through the through hole and is screwed to the screw hole.

[0015] Furthermore, in order to better implement the present invention, a notch is formed through the top of the oil guide groove, and an oil outlet is formed through a groove wall on one side of the oil guide groove close to the gear ring, and the oil outlet faces the oil inlet of the differential.

[0016] Furthermore, in order to better implement the utility model, a groove wall on one side of the oil guide groove away from the gear ring is penetrated to form a through opening;

[0017] The width of the oil guide groove gradually increases from the through opening to the oil outlet.

[0018] Furthermore, in order to better implement the present utility model, the oil guide groove is an inclined groove inclined downward toward the oil outlet.

[0019] The electric drive axle assembly provided by the utility model comprises the electric drive axle transmission component with better lubrication effect.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) The utility model provides an electric drive axle transmission assembly with better lubrication effect, including a reducer, a differential and an oil baffle. The reducer has a housing and a gear transmission pair installed in the housing. The gear transmission pair includes a planetary gear mechanism with a gear ring. The differential is installed in the electric drive axle housing and connected to the half-shaft. The gear transmission pair of the reducer is transmission-connected between the differential and the motor. The differential is located on the inner side of the gear ring, and the housing of the differential has an oil inlet. Lubricating oil enters the interior of the differential from the oil inlet. The oil baffle is installed in the electric drive axle housing and is located above the differential oil inlet of the differential. The oil baffle is used to collect lubricating oil thrown up by the partial diameter gear ring and guide the collected lubricating oil to the oil inlet of the differential.

[0022] When the vehicle is running, the reducer transmits the rotation output by the motor to the differential, and the differential transmits the rotation to the half-axle, which drives the wheel end to rotate. In the process of transmitting power, the gear ring of the planetary gear mechanism of the reducer will rotate, thereby rolling up the lubricating oil at the bottom of the electric drive axle housing. The rolled up lubricating oil has centrifugal force and splashes onto the top inner wall of the electric drive axle housing. Part of the lubricating oil splashed onto the top inner wall of the electric drive axle housing will circulate inside the electric drive axle housing along its inner wall, and the other part will splash to the top of the electric drive axle housing. The lubricating oil on the inner wall will fall down, and the setting of the above-mentioned oil baffle can catch part of the fallen lubricating oil and block part of the lubricating oil circulating in the electric drive axle housing, so that more lubricating oil is collected on the oil baffle. Since the lubricating oil has a certain kinetic energy, the lubricating oil collected on the oil baffle will be guided to the oil inlet of the differential through the oil baffle and enter the inside of the differential. In this way, when the vehicle is running, more lubricating oil enters the inside of the differential, thereby better lubricating the components inside the differential and reducing problems such as ablation of the differential.

[0023] (2) The electric drive axle assembly provided by the utility model includes the above-mentioned electric drive axle transmission component with better lubrication effect. Therefore, the electric drive axle assembly has better safety and stability in use and a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of an electric drive axle transmission assembly with better lubrication effect provided by an embodiment of the utility model;

[0026] Figure 2 yes Figure 1 A front view of the structure shown;

[0027] Figure 3 It is a position relationship diagram of the gear ring, the differential and the electric drive axle housing in the embodiment of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the oil baffle in the embodiment of the utility model.

[0029] In the figure:

[0030] 100-reducer, 110-gear ring, 120-docking port, 200-differential, 300-electric drive axle housing, 400-oil baffle, 410-connecting plate, 420-oil guide groove, 500-connecting piece. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0032] Embodiment 1:

[0033] The electric drive axle transmission assembly provided by this embodiment has a better lubrication effect. Figure 1-Figure 3 As shown, it includes a reducer 100, a differential 200 and an oil retaining member 400, wherein:

[0034] The reducer 100 has a housing and a gear transmission pair installed in the housing, the gear transmission pair includes a planetary gear mechanism with a gear ring 110, and the gear transmission pair structure and installation method inside the reducer 100 are the same as those in the prior art, so they will not be described in detail here. The differential 200 is installed in the electric drive axle housing 300 and connected to the half shaft. It should be noted that the half shaft is used to connect with the wheel end, thereby driving the wheel end to rotate.

[0035] The gear transmission pair of the speed reducer 100 is transmission-connected between the differential 200 and the motor. The differential 200 is located inside the gear ring 110 of the planetary gear mechanism, and the housing of the differential 200 has an oil inlet, through which lubricating oil enters the interior of the differential 200. The structure and installation method of the differential 200 are the same as those in the prior art, so they will not be described in detail here.

[0036] The oil baffle 400 is installed in the electric drive axle housing 300 and is located above the oil inlet of the differential 200 . The oil baffle 400 is used to collect the lubricating oil thrown up by the partial diameter gear ring 110 and guide the collected lubricating oil to the oil inlet of the differential 200 .

[0037] When the vehicle is running, the reducer 100 transmits the rotation output by the motor to the differential 200, and the differential 200 transmits the rotation to the half shaft, and uses the half shaft to drive the wheel end to rotate. In the process of transmitting power, the gear ring 110 of the planetary gear mechanism of the reducer 100 will rotate, thereby rolling up the lubricating oil at the bottom of the electric drive axle housing 300. The rolled up lubricating oil has centrifugal force and splashes onto the top inner wall of the electric drive axle housing. Part of the lubricating oil splashed onto the top inner wall of the electric drive axle housing will circulate along the inner wall of the electric drive axle housing 300, while the other part splashes onto the top inner wall of the electric drive axle housing. The lubricating oil will fall down, and the setting of the above-mentioned oil baffle 400 can catch part of the fallen lubricating oil and block part of the lubricating oil circulating in the electric drive axle housing 300, so that more lubricating oil is collected on the oil baffle 400. Since the lubricating oil has a certain kinetic energy, the lubricating oil collected on the oil baffle 400 will be guided to the oil inlet of the differential 200 through the oil baffle 400 and enter the inside of the differential 200. In this way, when the vehicle is running, more lubricating oil enters the inside of the differential 200, thereby better lubricating the components inside the differential 200 and reducing the occurrence of ablation problems in the differential 200.

[0038] Like the prior art, one side of the outer shell of the reducer 100 is provided with a docking port 120 for docking with the electric drive axle housing 300, the differential 200 and the gear ring 110 of the planetary gear mechanism are both accommodated in the docking port 120, and the oil baffle 400 is connected to the outer side wall of the docking port 120, so that the oil baffle 400 is actually located inside the electric drive axle housing 300.

[0039] Optionally, the oil retaining member 400 in this embodiment is as follows: Figure 1-Figure 4 As shown, it includes a connecting plate 410 and an oil guide groove 420, wherein:

[0040] The connecting plate 410 is a thin plate, which is connected to the outer wall of the docking port 120 through a connecting piece 500. The oil guide groove 420 is fixedly connected to the bottom end of the connecting plate 410, thereby connecting the oil guide groove 420 to the outer wall of the docking port 120 of the reducer 100, and the oil guide groove 420 is placed on the side of the above-mentioned gear ring 110 and not above the oil inlet of the differential 200, and the oil guide groove 420 is used to collect part of the lubricating oil thrown up by the gear ring 110 and guide the collected lubricating oil to the oil inlet of the differential 200. In this way, the lubricating oil is actually collected in the oil guide groove 420 and drained to the oil inlet of the differential 200 through the oil guide groove 420.

[0041] Of course, the oil guide groove 420 can be formed integrally with the connecting plate 410, or the bottom end of the connecting plate 410 is bent to form the oil guide groove 420, and the oil guide groove 420 and the connecting plate 410 form a "J-shaped" structure. In addition, the oil guide groove 420 can also be a separate groove body, which is welded and fixed to the connecting plate 410.

[0042] Optionally, the connecting member 500 is a bolt, a screw hole is provided on the outer wall of the docking port 120, a through hole is provided on the connecting plate 410, and the bolt passes through the through hole and is screwed to the screw hole, so that the oil retaining member 400 is detachably mounted on the outer wall of the housing of the reducer 100 by the bolt. Of course, the connecting member 500 can also be a rivet or a locking pin.

[0043] The top of the oil guide groove 420 in this embodiment is penetrated to form a notch, and the groove wall on one side of the oil guide groove 420 close to the gear ring 110 is penetrated to form an oil outlet, the oil outlet is toward the oil inlet of the above-mentioned differential 200, and the lubricating oil collected in the oil guide groove 420 will flow out from the oil outlet. Since the oil outlet is toward the oil inlet of the above-mentioned differential 200, the lubricating oil flowing out from the oil outlet will smoothly flow into the oil inlet of the differential 200, thereby entering the interior of the differential 200.

[0044] Preferably, in order to facilitate the lubricating oil in the oil guide groove 420 to flow out from the above-mentioned oil outlet, the oil guide groove 420 in this embodiment is an inclined groove inclined toward the oil outlet and downward, so that the lubricating oil collected in the oil guide groove 420 will flow out from the above-mentioned oil outlet more smoothly under the action of gravity and its own power.

[0045] Optionally, a through-opening is formed through the groove wall of the oil guide groove 420 on one side facing away from the gear ring 110, so that more lubricating oil can enter the oil guide groove 420 from the through-opening, and the width of the oil guide groove 420 gradually increases from the through-opening to the oil outlet, so that the lubricating oil in the oil guide groove 420 can flow to the oil outlet more smoothly and flow out from the oil outlet.

[0046] Of course, the guide groove may also be a straight groove, which is integrally formed with the connecting plate 410 to form a “J”-shaped structure.

[0047] Embodiment 2:

[0048] This embodiment provides an electric drive axle assembly, which includes the electric drive axle transmission component with better lubrication effect provided in Example 1. Therefore, the differential 200 of the electric drive axle assembly has better lubrication effect, and the safety and stability of the entire drive axle assembly are better, and the service life is longer.

[0049] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope recorded in the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An electric drive axle transmission assembly with better lubrication effect, characterized in that: include: A speed reducer (100) comprising a housing and a gear transmission pair installed in the housing, wherein the gear transmission pair comprises a planetary gear mechanism having a gear ring (110); A differential (200) is installed in the electric drive axle housing (300) and connected to the half shaft, the gear transmission pair is transmission-connected between the differential (200) and the electric motor, the differential (200) is located on the inner side of the gear ring (110), and the housing of the differential (200) has an oil inlet; An oil baffle (400) is installed in the electric drive axle housing (300) and is located above the oil inlet of the differential (200). The oil baffle (400) is used to collect part of the lubricating oil thrown up by the gear ring (110) and guide the collected lubricating oil to the oil inlet of the differential (200).

2. The electric drive axle transmission assembly with better lubrication effect according to claim 1 is characterized in that: A docking port (120) for docking with the electric drive axle housing (300) is provided on one side of the outer shell of the reducer (100); the differential (200) and the gear ring (110) are both accommodated in the docking port (120); and the oil retaining member (400) is connected to the outer side wall of the docking port (120).

3. The electric drive axle transmission assembly with better lubrication effect according to claim 2 is characterized in that: The oil blocking member (400) comprises: A connecting plate (410) connected to the outer side wall of the docking port (120) via a connecting piece (500); An oil guide groove (420) is fixedly connected to the bottom end of the connecting plate (410), the oil guide groove (420) is disposed on the side of the gear ring (110) and above the oil inlet of the differential (200), and the oil guide groove (420) is used to collect part of the lubricating oil thrown up by the gear ring (110) and guide the collected lubricating oil to the oil inlet of the differential (200).

4. The electric drive axle transmission assembly with better lubrication effect according to claim 3 is characterized in that: The connecting member (500) is a bolt, a screw hole is provided on the outer side wall of the docking port (120), a through hole is provided on the connecting plate (410), and the bolt passes through the through hole and is screwed to the screw hole.

5. The electric drive axle transmission assembly with better lubrication effect according to claim 3 is characterized in that: The top of the oil guide groove (420) is penetrated to form a notch, and a groove wall on one side of the oil guide groove (420) close to the gear ring (110) is penetrated to form an oil outlet, and the oil outlet faces the oil inlet of the differential (200).

6. The electric drive axle transmission assembly with better lubrication effect according to claim 5, characterized in that: The oil guide groove (420) is an inclined groove inclined downward toward the oil outlet.

7. The electric drive axle transmission assembly with better lubrication effect according to claim 6 is characterized in that: A groove wall on one side of the oil guide groove (420) facing away from the gear ring (110) penetrates to form a through opening; The width of the oil guide groove (420) gradually increases from the through opening to the oil outlet.

8. An electric drive axle assembly, characterized in that: An electric drive axle transmission assembly with better lubrication effect comprising any one of claims 1-7.

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