Lubrication structure of electric drive system, electric drive system and vehicle
By designing a lubricating structure on the shell and support of the electric drive system, and introducing lubricating oil using branch oil channels and oil transport structures, the problem of insufficient lubrication in the electric drive system is solved, and a continuous and stable lubrication effect is achieved.
Patent Information
- Application Number
- CN202420170330.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-01-23
AI Technical Summary
In the existing electric drive system, the shaft section where the inner hole of the differential shell half shaft cooperates with the through shaft cannot continuously provide sufficient lubrication due to splashing lubricating oil, resulting in the half shaft sintering failure and the test failed.
A lubricating structure of an electric drive system is designed, including a shell and a support member. A main oil passage and a branch oil passage are opened on the shell. An oil transmission structure is set on the support member. The lubricating oil is introduced into the position of the components to be lubricated through the branch oil passage and the oil transmission structure.
Continuous lubrication of the lubricating parts is achieved, the half-axle sintering failure caused by insufficient lubrication is avoided, and the stable operation of the electric drive system is ensured.
Smart Images
Figure CN222702531U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric drive equipment, and in particular to a lubrication structure of an electric drive system, an electric drive system and a vehicle. Background Art
[0002] In the related technology, the motor and reducer are integrated (share a housing). The main internal lubrication method of the reducer is splash lubrication, which is passive lubrication. The gear stirs the oil and the housing structure collects the lubricating oil to cool and lubricate the moving and heat-generating parts such as bearings, gears, and half-axles. For the shaft section where the inner hole of the differential housing half-axle matches the through-shaft, it is a clearance fit. The splash lubricating oil is blocked by centrifugal force and other structures, and it is impossible to continuously provide sufficient lubricating oil to this part. During the test, this position is prone to sintering failure of the half-axle due to insufficient lubrication, and the test fails. Utility Model Content
[0003] The main purpose of the utility model is to provide a lubrication structure of an electric drive system, an electric drive system and a vehicle, aiming to continuously provide lubricating oil to the parts to be lubricated.
[0004] To achieve the above-mentioned purpose, the lubrication structure of the electric drive system proposed in the utility model includes:
[0005] a housing, wherein the housing is provided with a main oil passage and a branch oil passage, wherein the branch oil passage is communicated with the main oil passage; and
[0006] A support member, wherein the support member is connected to the housing; the support member is provided with a mounting hole for mounting a part to be lubricated, and the support member is provided with an oil delivery structure, wherein the oil delivery structure has an oil cavity; one end of the oil cavity is arranged corresponding to the branch oil channel, and the other end is arranged corresponding to the part to be lubricated, so that the lubricating oil in the branch oil channel flows through the oil cavity to the position of the part to be lubricated.
[0007] In an embodiment of the present invention, the oil delivery structure and the support member are an integrally formed structure.
[0008] In one embodiment of the utility model, the oil delivery structure comprises:
[0009] An oil delivery channel, the oil delivery channel being arranged on the support member, one end of the oil delivery channel being arranged corresponding to an end of the branch oil channel away from the main oil channel;
[0010] An oil guide groove is provided on the support member, one end of the oil guide groove is communicated with the oil delivery channel, and the other end of the oil guide groove extends toward the mounting hole and is provided corresponding to the component to be lubricated.
[0011] In an embodiment of the present invention, the diameter of the branch oil passage is smaller than the diameter of the oil delivery passage.
[0012] In one embodiment of the utility model, the oil delivery channel and the oil guide groove are arranged at an angle;
[0013] And / or, the oil guiding groove is arranged at an angle with respect to the radial direction of the mounting hole.
[0014] In an embodiment of the utility model, the groove wall of the oil guiding groove extends along the radial direction of the mounting hole to form a boss.
[0015] In an embodiment of the utility model, the oil delivery structure is an oil pipe, and the oil pipe is installed on the support plate.
[0016] The utility model also provides an electric drive system, the electric drive system comprising:
[0017] The lubrication structure of the electric drive system as described above; and
[0018] a through shaft, the through shaft being passed through the mounting hole of the lubrication structure; and
[0019] A differential housing, the differential housing is sleeved on the through shaft and inserted into the mounting hole, and the differential housing is rotatably connected to the support member;
[0020] Wherein, the lubricating oil flowing out from the oil cavity of the lubricating structure flows to the through shaft.
[0021] In one embodiment of the utility model, a spiral oil groove is provided on the outer wall of the through-shaft; wherein the lubricating oil flowing out of the oil cavity of the lubrication structure flows to the through-shaft and is driven to between the differential housing and the through-shaft through the oil groove.
[0022] The utility model also provides a vehicle, the vehicle comprising:
[0023] The vehicle body, and
[0024] The electric drive system as described above is installed on the vehicle body.
[0025] In the technical solution of the utility model, a branch oil channel connected to the main oil channel is opened on the shell, and an oil delivery structure is arranged on the support member. Therefore, part of the lubricating oil in the main oil channel can be introduced from the branch oil channel into the oil delivery structure and then delivered to the position of the part to be lubricated in the mounting hole, thereby achieving the purpose of continuously providing lubricating oil to the part to be lubricated. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] 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 the structures shown in these drawings without paying creative work.
[0027] Figure 1 It is a partial structural schematic diagram of an embodiment of the electric drive system of the utility model;
[0028] Figure 2 It is a schematic diagram of a part of the structure of an embodiment of the electric drive system of the utility model from another angle;
[0029] Figure 3 It is a structural schematic diagram of the oil guide groove in one embodiment of the electric drive system of the utility model.
[0030] Description of Figure Numbers:
[0031] 1 case 1a Main oil channel 1b Branch oil channel 2 Support 2a Mounting holes 21 Oil transportation structure 211 Oil pipeline 212 Oil guide groove 2121 Boss 3 Through shaft 4 Differential housing
[0032] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. 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 embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0036] The utility model proposes a lubrication structure for an electric drive system, which can be applied to the electric drive system of a vehicle, especially the differential in a reducer assembly, and can achieve the purpose of continuously providing lubricating oil to the half shafts, gears, differential housing and other positions of the differential, and can even achieve quantitative supply of lubricating oil.
[0037] In the embodiment of the present utility model, Figure 1 , Figure 2 and Figure 3 As shown, the lubrication structure of the electric drive system includes a housing 1 and a support member 2, wherein the housing 1 is provided with a main oil passage 1a and a branch oil passage 1b, wherein the branch oil passage 1b is communicated with the main oil passage 1a; the support member 2 is connected to the housing 1; the support member 2 is provided with a mounting hole 2a for mounting a part to be lubricated, and the support member 2 is provided with an oil delivery structure 21, wherein the oil delivery structure 21 has an oil cavity; one end of the oil cavity is arranged corresponding to the branch oil passage 1b, and the other end is arranged corresponding to the part to be lubricated, so that the lubricating oil in the branch oil passage 1b flows through the oil cavity to the position of the part to be lubricated.
[0038] In this embodiment, by opening a branch oil passage 1b connected to the main oil passage 1a on the housing 1, and providing an oil delivery structure 21 on the support member 2, part of the lubricating oil in the main oil passage 1a can be introduced from the branch oil passage 1b into the oil delivery structure 21 and then delivered to the position of the part to be lubricated in the mounting hole 2a, thereby achieving the purpose of continuously providing lubricating oil to the part to be lubricated.
[0039] In one embodiment, the parts to be lubricated are the differential case and half shafts of the differential. It can be understood that as the differential runs, the lubricating oil on the parts to be lubricated will also be driven to positions such as gears.
[0040] It can be understood that the housing 1 of the electric drive system is provided with a main oil channel 1a for providing lubricating oil lubrication for the electric drive system. In this embodiment, a branch oil channel 1b is opened on the basis of the original main oil channel 1a, and a part of the lubricating oil in the main oil channel 1a is introduced into the parts to be lubricated in the mounting hole 2a. The structure is simple and easy to implement, and can continuously provide lubricating oil to the parts to be lubricated.
[0041] In this embodiment, the main oil passage 1 a is located at the upper position of the housing 1 , and the lubricating oil flows to the oil chamber under the action of gravity, and then moves along the oil delivery structure 21 under the action of gravity.
[0042] In one embodiment of the present utility model, as shown in FIG. Figure 1 , Figure 2 and Figure 3 As shown, the oil delivery structure 21 and the support member 2 are an integrally formed structure.
[0043] It is understandable that the oil delivery structure 21 and the support member 2 are an integrally formed structure, and the oil delivery structure 21 is directly formed during the production process of the support member 2, which reduces the subsequent assembly process, and the integrally formed structure has higher stability. The oil delivery structure 21 is integrated on the support member 2, which can reduce the use of parts such as oil pipes, improve assembly efficiency, and make the reducer layout more compact, smaller in size, and lower in cost.
[0044] In another embodiment, the oil delivery structure 21 is an oil pipe, and the oil pipe is installed on the support plate. In this embodiment, the oil delivery structure 21 and the support plate are two independent components, which are connected and fixed by a connection structure or a connection process.
[0045] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the oil delivery structure 21 includes an oil delivery channel 211 and an oil guide groove 212. The oil delivery channel 211 is provided on the support member 2, and one end of the oil delivery channel 211 corresponds to the end of the branch oil channel 1b away from the main oil channel 1a; the oil guide groove 212 is provided on the support member 2, and one end of the oil guide groove 212 is connected to the oil delivery channel, and the other end extends toward the mounting hole 2a and is provided corresponding to the lubricated component. The oil delivery channel 211 is an oil channel with only two ends connected, and the oil guide groove 212 is a half-edge structure. The circumferential sealing of the oil delivery channel 211 can prevent the leakage of lubricating oil, and the oil guide groove 212 is close to the lubricated component, and the size of the lubricated component is larger than that of the oil guide groove 212. The half-edge structure of the oil guide groove 212 can make the contact area of the lubricating oil input on the lubricated component larger, thereby improving the lubrication efficiency and lubrication effect.
[0046] It can be understood that the oil delivery passage 211 and the oil guide groove 212 are connected to form the aforementioned oil chamber.
[0047] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the diameter of the branch oil passage 1 b is smaller than the diameter of the oil delivery passage 211 .
[0048] like Figure 1 As shown, there is a gap between the oil outlet position of the branch oil passage 1b and the oil inlet position of the oil delivery channel. It can be understood that the diameter of the branch oil passage 1b is designed to be smaller to ensure that the lubricating oil will not deviate and avoid insufficient lubrication.
[0049] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the oil delivery channel 211 and the oil guide groove 212 are arranged at an angle.
[0050] It is understandable that the oil delivery channel 211 and the oil guide groove 212 are arranged at an angle to buffer the flow of the lubricating oil, and the lubricating oil can flow downward along the oil guide groove 212 .
[0051] In one embodiment of the present invention, Figure 1 As shown, the oil guiding groove 212 is arranged at an angle with the radial direction of the mounting hole 2a.
[0052] It can be understood that the oil guide groove 212 is set at an angle with the radial direction of the mounting hole 2a, that is, the oil guide groove 212 is set at an angle, which can ensure that the lubricating oil flowing to the parts to be lubricated flows along the oil guide groove 212, thereby achieving the continuity and stability of the oil supply, and further achieving the purpose of quantitative and continuous supply of lubricating oil.
[0053] In one embodiment of the present invention, Figure 2 and Figure 3 As shown, the groove wall of the oil guiding groove 212 extends along the radial direction of the mounting hole 2a to form a boss 2121.
[0054] It is understandable that the design of the boss 2121 can ensure that the lubricating oil flows downward more and reduce the amount of the lubricating oil flowing to the sides along the arc of the mounting hole 2a.
[0055] The utility model also proposes an electric drive system, which includes the lubrication structure of the electric drive system as described above, a through shaft 3 and a differential housing 4, wherein the through shaft 3 is passed through the mounting hole 2a of the lubrication structure; the differential housing 4 is sleeved on the through shaft 3 and inserted into the mounting hole 2a, and the differential housing 4 is rotatably connected to the support member 2; wherein the lubricating oil flowing out of the oil chamber of the lubrication structure flows to the through shaft 3.
[0056] The utility model also proposes a vehicle, and the specific structure of the lubrication structure of the electric drive system refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.
[0057] In one embodiment of the present invention, Figure 1 As shown, the outer wall of the through shaft 3 is provided with a spiral oil groove; wherein, after the lubricating oil flowing out of the oil cavity of the lubrication structure flows to the through shaft 3, it is driven to between the differential housing 4 and the through shaft 3 through the oil groove.
[0058] It can be understood that the lubricating oil flows along the oil delivery structure 21 to the through shaft 3. A spiral oil groove is designed on the through shaft 3. When the through shaft 3 works normally, the lubricating oil falling on the through shaft 3 flows through the spiral oil groove to the lubrication parts of the differential case 4 and the through shaft 3 and the half-axle gears.
[0059] The coaxial electric drive reducer in the related art mostly adopts splash lubrication, but the present invention adopts full active lubrication. Full active lubrication can provide lubricating oil to each key position of the electric drive in a quantitative, continuous and accurate manner, greatly reducing the failure problem caused by insufficient lubrication.
[0060] The utility model also proposes a vehicle, the vehicle comprising a vehicle body and the electric drive system as described above, the specific structure of the electric drive system refers to the above embodiments, since the vehicle adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Wherein, the electric drive system is installed on the vehicle body.
[0061] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the creative concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A lubrication structure of an electric drive system, characterized in that: The lubrication structure of the electric drive system comprises: a housing, wherein the housing is provided with a main oil passage and a branch oil passage, wherein the branch oil passage is communicated with the main oil passage; and A support member, wherein the support member is connected to the housing; the support member is provided with a mounting hole for mounting a part to be lubricated, and the support member is provided with an oil delivery structure, wherein the oil delivery structure has an oil cavity; one end of the oil cavity is arranged corresponding to the branch oil channel, and the other end is arranged corresponding to the part to be lubricated, so that the lubricating oil in the branch oil channel flows through the oil cavity to the position of the part to be lubricated.
2. The lubrication structure of the electric drive system according to claim 1, characterized in that: The oil delivery structure and the support member are an integrally formed structure.
3. The lubrication structure of the electric drive system according to claim 2, characterized in that: The oil delivery structure comprises: An oil delivery channel, the oil delivery channel being arranged on the support member, one end of the oil delivery channel being arranged corresponding to an end of the branch oil channel away from the main oil channel; An oil guide groove is provided on the support member, one end of the oil guide groove is communicated with the oil delivery channel, and the other end of the oil guide groove extends toward the mounting hole and is provided corresponding to the component to be lubricated.
4. The lubrication structure of the electric drive system according to claim 3, characterized in that: The diameter of the branch oil passage is smaller than the diameter of the oil delivery passage.
5. The lubrication structure of the electric drive system according to claim 3, characterized in that: The oil delivery channel and the oil guide groove are arranged at an angle; And / or, the oil guiding groove is arranged at an angle with respect to the radial direction of the mounting hole.
6. The lubrication structure of the electric drive system according to claim 3, characterized in that: The groove wall of the oil guide groove extends along the radial direction of the mounting hole to form a boss.
7. The lubrication structure of the electric drive system according to claim 1, characterized in that: The oil delivery structure is an oil pipe, and the oil pipe is installed on the support member.
8. An electric drive system, characterized in that: The electric drive system comprises: The lubrication structure of the electric drive system according to any one of claims 1 to 7; and a through shaft, the through shaft being passed through the mounting hole of the lubrication structure; and A differential housing, the differential housing is sleeved on the through shaft and inserted into the mounting hole, and the differential housing is rotatably connected to the support member; Wherein, the lubricating oil flowing out from the oil cavity of the lubricating structure flows to the through shaft.
9. The electric drive system according to claim 8, characterized in that: The outer wall of the through shaft is provided with a spiral oil groove; wherein, after the lubricating oil flowing out of the oil cavity of the lubricating structure flows to the through shaft, it is driven to between the differential housing and the through shaft through the oil groove.
10. A vehicle, characterized in that: The vehicle comprises: The vehicle body, and The electric drive system according to claim 8 or 9, wherein the electric drive system is installed on the vehicle body.