Oil guide pipe, motor oil guide structure and electric drive assembly
By setting up an inverted structure on the oil guide pipe and cooperating with the input shaft, the problem of loosening and wear of the oil guide pipe under the action of long-term axial force is solved, and better sealing effect and stability are achieved.
Patent Information
- Application Number
- CN202421590056.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The existing oil conductor pipes are prone to loosening and wear under long-term axial force, resulting in poor sealing effect and affecting the normal operation of the motor.
The inverted structure is used to cooperate with the input shaft to absorb axial force through the elastic deformation of the inverted structure, which enhances the anti-detachment effect of the oil guide pipe.
It effectively improves the anti-detachment effect of the oil guide pipe, prevents loosening and wear, ensures long-term stable oil circulation, and improves the reliability of the motor.
Smart Images
Figure CN222953795U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil guide structures, in particular to an oil guide pipe, a motor oil guide structure and an electric drive assembly. Background Art
[0002] Since oil-cooled motors require rotor oil cooling, a lubrication pipeline needs to be designed to introduce the lubricating oil into the motor shaft. In order to ensure the oil flow and connection reliability of the oil guide pipe, the oil guide pipe needs to be sealed and designed to prevent it from falling off.
[0003] In the related art, the oil guide tube is inserted into the input shaft, and the outer wall of the oil guide tube is interference fit with the inner hole wall of the input shaft for sealing and anti-slip design. The sealing and anti-slip effects are limited, resulting in the oil guide tube becoming loose due to long-term axial force in the later stage, and interfering with other parts, which can easily cause the oil guide tube to fall off and wear. Utility Model Content
[0004] The main purpose of the utility model is to provide an oil guide pipe, a motor oil guide structure and an electric drive assembly, aiming to improve the problem that the oil guide pipe is easy to fall off and wear.
[0005] In order to achieve the above-mentioned purpose, the utility model provides an oil guide pipe, comprising:
[0006] tube body;
[0007] An undercut structure is provided on the outer side wall of the tube body and is used for buckling with the input shaft.
[0008] In one embodiment, the undercut structure is an elastic deformation structure.
[0009] In one embodiment, a first deformation absorbing region is formed between the undercut structure and the outer side wall of the tube body.
[0010] In one embodiment, a second deformation absorbing region is formed in the tube body.
[0011] In one embodiment, the tube body is provided with a first end and a second end which are arranged opposite to each other, the first end is used to communicate with the inside of the motor shaft, and the undercut structure is arranged close to the second end.
[0012] In one embodiment, the inner wall of the tube body is provided with a lubricating oil passage penetrating to the outer wall.
[0013] In one embodiment, the outer side wall of the tube body is further provided with a sealing portion, and the lubricating oil passage is located between the sealing portion and the first end.
[0014] In one embodiment, an outer side wall of the sealing portion is provided with a sealing groove, and a sealing ring is installed in the sealing groove.
[0015] The utility model also provides a motor oil guide structure, comprising:
[0016] A motor shaft, wherein the motor shaft is provided with an oil guide end;
[0017] An input shaft, one end of which is sleeved on the oil guide end, and a buckle groove is provided on the inner hole wall of the input shaft;
[0018] As described above, the oil guide tube is inserted into the input shaft, and the first end of the oil guide tube is connected to the inside of the motor shaft, and the undercut structure of the oil guide tube is buckled in the buckle groove.
[0019] In one embodiment, the motor shaft and the input shaft are matched via a spline, and the inner side wall of the tube body is provided with a lubricating oil passage penetrating to the outer side wall, and the lubricating oil flowing out of the lubricating oil passage flows toward the spline.
[0020] In one embodiment, the outer wall of the tube body is further provided with a sealing portion, an oil storage area is formed between the sealing portion and the end of the oil guide end, the lubricating oil channel is located between the sealing portion and the first end, and the lubricating oil flowing out of the lubricating oil channel enters the oil storage area and then flows toward the spline.
[0021] The utility model also provides an electric drive assembly, comprising the motor oil guide structure as described above.
[0022] The oil guide pipe disclosed in the technical solution of the utility model can effectively improve the anti-dropping effect of the oil guide pipe by adopting an undercut structure to buckle with the input shaft, and realize the anti-dropping function under the action of long-term axial force, thereby effectively improving the problem of easy drop-off and wear of the oil guide pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] 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.
[0024] Figure 1 A cross-sectional view of an embodiment of an oil guide tube provided by the utility model;
[0025] Figure 2 A partial enlarged view of an embodiment of an oil guide tube provided by the utility model;
[0026] Figure 3 A right side view of an embodiment of an oil guide tube provided by the utility model;
[0027] Figure 4 A cross-sectional view of an embodiment of the motor oil guide structure provided by the utility model;
[0028] Figure 5 for Figure 4 A partial enlarged view of the middle A;
[0029] Figure 6 This is a partial enlarged view of an embodiment of the motor oil guide structure provided by the utility model.
[0030] Description of Figure Numbers:
[0031] 100. Motor oil guide structure; 10. Oil guide pipe; 11. Pipe body; 111. First end; 112. Second end; 113. Lubricating oil channel; 114. Second deformation absorbing area; 12. Undercut structure; 121. First deformation absorbing area; 13. Sealing part; 131. Sealing groove; 132. Sealing ring; 20. Motor shaft; 21. Oil guide end; 22. Oil guide hole; 30. Input shaft; 31. Buckle groove; 40. Spline; 50. Oil storage area.
[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained 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 in a certain specific posture. If the specific posture changes, the directional indications 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 limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, 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 it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0036] Since oil-cooled motors require rotor oil cooling, a lubrication pipeline needs to be designed to introduce the lubricating oil into the motor shaft. In order to ensure the oil flow and connection reliability of the oil guide pipe, the oil guide pipe needs to be sealed and designed to prevent it from falling off.
[0037] In the related art, the oil guide tube is inserted into the input shaft, and the outer wall of the oil guide tube is interference fit with the inner hole wall of the input shaft for sealing and anti-slip design. The sealing and anti-slip effects are limited, resulting in the oil guide tube becoming loose due to long-term axial force in the later stage, and interfering with other parts, which can easily cause the oil guide tube to fall off and wear.
[0038] Based on the above problems, the utility model proposes an oil guide tube, aiming to improve the problem that the oil guide tube is easy to fall off and wear.
[0039] See also Figure 1 , Figure 2 In one embodiment of the present invention, the oil guide pipe 10 includes a pipe body 11 and an undercut structure 12 ; the undercut structure 12 is disposed on the outer side wall of the pipe body 11 for buckling with the input shaft 30 .
[0040] The oil guide tube 10 disclosed in the technical solution of the utility model can effectively improve the anti-dropping effect of the oil guide tube 10 by adopting the undercut structure 12 to buckle with the input shaft 30, and realize the anti-dropping function under the action of long-term axial force, thereby effectively improving the problem of easy dropout and wear of the oil guide tube 10.
[0041] It should be noted that when the oil guide tube 10 is applied to the motor oil guide structure 100, the oil guide tube 10 can be pressed into the input shaft 30 from one end of the input shaft 30 until the undercut structure 12 on the oil guide tube 10 is snap-fitted with the input shaft 30. Then, the oil guide tube 10 can be pressed into the input shaft 30, and the oil outlet end of the oil guide tube 10 is connected to the interior of the motor shaft 20. In this way, after the lubricating oil enters the oil guide tube 10 from the oil inlet end of the oil guide tube 10, it enters the interior of the motor shaft 20 from the oil outlet end under the guidance of the oil guide tube 10 to cool the motor shaft 20.
[0042] In actual application, the undercut structure 12 can be an integrally formed structure with the tube body 11, or can be fixedly installed on the outer wall of the tube body 11 by bonding, screw connection, etc. Optionally, in order to ensure the connection strength between the undercut structure 12 and the tube body 11 and simplify the preparation process, the undercut structure 12 and the tube body 11 can be an integrally formed structure.
[0043] In actual application, the undercut structure 12 can be arranged close to the end of the tube body 11 , or close to the middle of the tube body 11 .
[0044] See also Figure 2 In one embodiment of the present invention, the undercut structure 12 is an elastic deformation structure.
[0045] With such arrangement, during the installation of the oil guide tube 10, the undercut structure 12 will first contact the end of the input shaft 30 to squeeze the undercut structure 12, and the undercut structure 12 will deform to smoothly enter the inner hole of the input shaft 30, so as to be engaged with the buckle groove 31 in the inner hole of the input shaft 30 to fix the oil guide tube 10.
[0046] See also Figure 2 In one embodiment of the present invention, a first deformation absorbing area 121 is formed between the undercut structure 12 and the outer side wall of the tube body 11 .
[0047] In this way, the first deformation absorbing region 121 can provide a deformation space for the undercut structure 12 when it is deformed, so that the undercut structure 12 can be deformed more smoothly.
[0048] As some exemplary examples, the first deformation absorbing region 121 may be a groove body provided at the end of the undercut structure 12 , and when the undercut structure 12 is squeezed, it may move toward the groove body to deform smoothly.
[0049] See also Figure 3 In one embodiment of the present invention, a second deformation absorbing area 114 is formed in the tube body 11 .
[0050] In this configuration, when the oil guiding tube 10 is installed on the input shaft 30, in order to further improve the installation stability between the oil guiding tube 10 and the input shaft 30, the oil guiding tube 10 will also have an interference fit with the input shaft 30, and the outer diameter of the oil guiding tube 10 will be slightly larger than the inner diameter of the input shaft 30. Therefore, by forming the second deformation absorbing area 114 in the tube body 11, during the installation process of the oil guiding tube 10, the second deformation absorbing area 114 can provide space for the deformation of the oil guiding tube 10, so that the oil guiding tube 10 can smoothly enter the inner hole of the input shaft 30.
[0051] As some exemplary examples, a plurality of second deformation absorbing regions 114 may be distributed at intervals in the circumferential direction of the tube body 11 , so as to provide sufficient and balanced space for deformation of the oil guiding tube 10 .
[0052] See also Figure 1 In one embodiment of the utility model, the tube body 11 is provided with a first end 111 and a second end 112 which are arranged opposite to each other, the first end 111 is used to communicate with the inside of the motor shaft 20 , and the undercut structure 12 is arranged near the second end 112 .
[0053] In this way, by arranging the undercut structure 12 close to the second end 112 of the tube body 11, that is, the undercut structure 12 is arranged away from the motor shaft 20, so that when the oil guide tube 10 is press-fitted, the undercut structure 12 can be finally pressed into the inner hole of the input shaft 30, which can reduce the wear of the undercut structure 12 on the input shaft 30 during the press-fitting process.
[0054] See also Figure 1 In one embodiment of the present invention, the inner wall of the tube body 11 is provided with a lubricating oil passage 113 penetrating to the outer wall.
[0055] With such arrangement, part of the lubricating oil entering the oil guide pipe 10 can flow out from the lubricating oil passage 113 to the spline 40 where the motor shaft 20 and the input shaft 30 cooperate, so as to lubricate and cool the spline 40. Therefore, there is no need to set up an additional oil circuit to lubricate and cool the spline 40 where the motor shaft 20 and the input shaft 30 cooperate, which can simplify the structural design.
[0056] As some exemplary embodiments, the lubricating oil passage 113 may be arranged to extend in the radial direction of the pipe body 11 .
[0057] See also Figure 1 In one embodiment of the present invention, a sealing portion 13 is further provided on the outer side wall of the tube body 11 , and the lubricating oil passage 113 is located between the sealing portion 13 and the first end 111 .
[0058] In this way, the sealing portion 13 can prevent the lubricating oil flowing out of the lubricating oil passage 113 from flowing toward the second end 112 of the tube body 11 and outflowing from the gap between the second end 112 of the oil guide tube 10 and the input shaft 30, thereby preventing the lubricating oil from leaking.
[0059] See also Figure 1 In one embodiment of the present invention, a sealing groove 131 is provided on the outer wall of the sealing portion 13 , and a sealing ring 132 is installed in the sealing groove 131 .
[0060] In this configuration, by installing a sealing ring 132 in the sealing groove 131 of the sealing portion 13, when the oil guide pipe 10 is pressed into the inner hole of the input shaft 30, the sealing ring 132 abuts against the inner hole wall of the input shaft 30, which can improve the sealing performance between the sealing portion 13 and the input shaft 30.
[0061] Exemplarily, the sealing ring 132 may be a rubber ring.
[0062] See also Figure 3 In one embodiment of the utility model, a plurality of undercut structures 12 are provided, and the plurality of undercut structures 12 are distributed at intervals along the circumference of the tube body 11 .
[0063] With such a configuration, a plurality of undercut structures 12 can be simultaneously engaged with the input shaft 30 , which can further enhance the anti-drop effect of the oil guide tube 10 .
[0064] In actual application, the shapes and sizes of the multiple undercut structures 12 may be the same or different, as long as they can be engaged with the input shaft 30 , and no specific limitation is made here.
[0065] See also Figures 4 to 6 The utility model further proposes a motor oil guide structure 100, which includes a motor shaft 20, an input shaft 30 and an oil guide pipe 10. The specific structure of the oil guide pipe 10 refers to the above embodiment. Since the motor oil guide structure 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.
[0066] Among them, the motor shaft 20 is provided with an oil guide end 21; one end of the input shaft 30 is sleeved on the oil guide end 21, and the inner hole wall of the input shaft 30 is provided with a buckle groove 31; the oil guide pipe 10 is inserted into the input shaft 30, and the first end 111 of the oil guide pipe 10 is connected to the interior of the motor shaft 20, and the inverted structure 12 of the oil guide pipe 10 is buckled in the buckle groove 31.
[0067] It can be understood that during the installation of the motor oil guide structure 100, the oil guide tube 10 can be pressed into the input shaft 30 from one end of the input shaft 30 until the undercut structure 12 of the oil guide tube 10 is buckled in the buckle groove 31 of the input shaft 30, and the oil guide tube 10 can be pressed into the input shaft 30, and then the other end of the input shaft 30 is sleeved on the oil guide end 21 of the motor shaft 20 to be transmission-connected with the motor shaft 20, and at the same time, the oil outlet end of the oil guide tube 10 is connected to the inside of the motor shaft 20. In this way, after the lubricating oil enters the oil guide tube 10 from the oil inlet end, it enters the inside of the motor shaft 20 from the oil outlet end under the guidance of the oil guide tube 10 to cool the motor shaft 20.
[0068] As some examples, the motor shaft 20 is provided with oil guide holes 22 arranged along its radial direction. When the motor shaft 20 is running, the lubricating oil can be thrown from the oil guide holes 22 to the inner surface of the stator winding under the action of centrifugal force to cool the winding.
[0069] Optionally, four oil guide holes 22 can be arranged on the motor shaft 20, wherein two oil guide holes 22 are arranged close to the oil guide end 21 of the motor shaft 20 and the two oil guide holes 22 are arranged opposite to each other, and the other two oil guide holes 22 are arranged away from the oil guide end 21 of the motor shaft 20 and the two oil guide holes 22 are arranged opposite to each other. In this way, not only can more lubricating oil be thrown to the inner surface of the stator winding through the four oil guide holes 22 to enhance the cooling effect on the winding, but the design of the four oil guide holes 22 can ensure the balance of the motor shaft 20 during operation.
[0070] See also Figure 4 , Figure 6 In one embodiment of the utility model, the motor shaft 20 and the input shaft 30 are matched through a spline 40, and the inner wall of the tube body 11 is provided with a lubricating oil passage 113 that penetrates to the outer wall, and the lubricating oil flowing out of the lubricating oil passage 113 flows to the spline 40.
[0071] With such arrangement, part of the lubricating oil entering the oil guide pipe 10 can flow out from the lubricating oil passage 113 to the spline 40 where the motor shaft 20 and the input shaft 30 cooperate, so as to lubricate and cool the spline 40. Therefore, there is no need to set up an additional oil circuit to lubricate and cool the spline 40 where the motor shaft 20 and the input shaft 30 cooperate, which can simplify the structural design.
[0072] See also Figure 4 , Figure 6 In one embodiment of the utility model, a sealing portion 13 is further provided on the outer wall of the tube body 11, and an oil storage area 50 is formed between the sealing portion 13 and the end of the oil guide end 21. The lubricating oil passage 113 is located between the sealing portion 13 and the first end 111, and the lubricating oil flowing out of the lubricating oil passage 113 enters the oil storage area 50 and then flows to the spline 40.
[0073] In this way, the sealing portion 13 is arranged so that the lubricating oil flowing out of the lubricating oil passage 113 can be stored in the oil storage area 50, and then flow to the spline 40 through the oil storage area 50 to lubricate and cool the spline 40, which can prevent the lubricating oil flowing out of the lubricating oil passage 113 from flowing to the second end 112 of the tube body 11 and flowing out from the gap between the second end 112 of the oil guide tube 10 and the input shaft 30, thereby preventing the lubricating oil from leaking.
[0074] The utility model also proposes an electric drive assembly, which includes a motor oil guide structure 100. The specific structure of the motor oil guide structure 100 refers to the above-mentioned embodiment. Since the electric drive assembly adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.
[0075] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An oil guide pipe, characterized in that: include: tube body; An undercut structure is provided on the outer side wall of the tube body and is used for buckling with the input shaft.
2. The oil guide tube according to claim 1, characterized in that: The undercut structure is an elastic deformation structure.
3. The oil guide tube according to claim 2, characterized in that: A first deformation absorbing area is formed between the undercut structure and the outer side wall of the tube body.
4. The oil guide pipe according to any one of claims 1 to 3, characterized in that: A second deformation absorbing region is formed in the tube body.
5. The oil guide pipe according to any one of claims 1 to 3, characterized in that: The tube body is provided with a first end and a second end which are arranged opposite to each other, the first end is used to communicate with the inside of the motor shaft, and the undercut structure is arranged close to the second end.
6. The oil guide tube according to claim 5, characterized in that: The inner side wall of the tube body is provided with a lubricating oil passage penetrating to the outer side wall.
7. The oil guide tube according to claim 6, characterized in that: The outer side wall of the tube body is further provided with a sealing portion, and the lubricating oil passage is located between the sealing portion and the first end.
8. The oil guide tube according to claim 7, characterized in that: The outer side wall of the sealing portion is provided with a sealing groove, and a sealing ring is installed in the sealing groove.
9. A motor oil guide structure, characterized in that: include: A motor shaft, wherein the motor shaft is provided with an oil guide end; An input shaft, one end of which is sleeved on the oil guide end, and a buckle groove is provided on the inner hole wall of the input shaft; The oil guide tube according to any one of claims 1 to 8, wherein the oil guide tube is inserted into the input shaft, and the first end of the oil guide tube is connected to the interior of the motor shaft, and the undercut structure of the oil guide tube is buckled in the buckle groove.
10. The motor oil guide structure according to claim 9, characterized in that: The motor shaft and the input shaft are matched through splines, and the inner side wall of the tube body is provided with a lubricating oil passage penetrating to the outer side wall, and the lubricating oil flowing out of the lubricating oil passage flows toward the splines.
11. The motor oil guide structure according to claim 10, characterized in that: The outer wall of the tube body is also provided with a sealing portion, an oil storage area is formed between the sealing portion and the end of the oil guide end, the lubricating oil channel is located between the sealing portion and the first end, and the lubricating oil flowing out of the lubricating oil channel enters the oil storage area and then flows to the spline.
12. An electric drive assembly, characterized in that: It comprises the motor oil guide structure as claimed in any one of claims 9 to 11.