Hybrid power transmission
By arranging a buffer between the motor shaft and the cover body, the problem of poor connection stability between the motor shaft and other components in the hybrid transmission is solved, and stable connection and effective cooling between the motor shaft and the cover body are achieved.
Patent Information
- Application Number
- CN202422580718.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The connection stability between the motor shaft and other components in the hybrid transmission is poor, especially due to the eccentric force generated by the gear connection relationship.
A buffer is provided between the motor shaft and the cover body. The buffer is radially arranged between the motor shaft and the cover body and its position is fixed by a fixing groove. The buffer is a retaining ring or an elastic sealing ring, which plays a buffering role and reduces the influence of eccentric force on the connection stability.
The connection stability between the motor shaft and the cover body is improved, the stable connection between the motor shaft and the cover body is ensured, the adverse effect of eccentric force on the connection is reduced, and the cooling effect is guaranteed.
Smart Images
Figure CN223306270U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of transmissions, and in particular to a hybrid transmission. Background Art
[0002] A dedicated hybrid transmission (DHT) is a transmission system used in hybrid vehicles. Its primary function is to transfer power from the engine and electric motor to the vehicle's drive wheels, adjusting power output based on driving conditions and requirements. The gear connections in a hybrid transmission's motor shaft can generate eccentric forces, which can negatively impact the stability of the connections between the motor shaft and other components. Utility Model Content
[0003] The present application provides a hybrid transmission that can ensure the connection stability between the motor shaft and the cover body.
[0004] The present application provides a hybrid transmission. The hybrid transmission includes a motor shaft having a cooling cavity therein for passing a cooling medium. The cooling cavity extends axially along the motor shaft and has an opening at one end of the cooling cavity in the axial direction of the motor shaft. The motor shaft also has a radial direction perpendicular to the axial direction. The hybrid transmission also includes a cover body disposed over the opening. The hybrid transmission also includes a buffer member radially disposed between the motor shaft and the cover body.
[0005] In one embodiment of the present application, the cover is embedded in the cooling cavity through the opening, and the buffer is radially arranged between the cavity wall of the cooling cavity and the outer wall of the cover.
[0006] In one embodiment of the present application, a first fixing groove is provided on a cavity wall of the cooling cavity close to the opening, the buffer is embedded in the first fixing groove, and the first fixing groove is configured to fix the buffer.
[0007] In one embodiment of the present application, a second fixing groove is provided on the outer side wall of the cover body, the buffer is embedded in the second fixing groove, and the second fixing groove is configured as a position for fixing the buffer.
[0008] In one embodiment of the present application, the cover body includes a main body and a mating portion, the mating portion is connected to one side of the main body in the axial direction of the motor shaft, the mating portion is matingly connected to the cavity wall of the cooling cavity, and the buffer part is arranged between the cavity wall of the cooling cavity and the side wall of the mating portion radially facing away from the main body.
[0009] In one embodiment of the present application, the buffer member is disposed around the outer circumference of the cover.
[0010] In one embodiment of the present application, the buffer member is a snap ring.
[0011] In one embodiment of the present application, the buffer component is an elastic sealing ring.
[0012] In one embodiment of the present application, the cover body is provided with a through hole, which is arranged to pass through the cover body along the axial direction of the motor shaft, and the through hole is communicated with the cooling cavity.
[0013] In one embodiment of the present application, a first gear is provided on the end of the motor shaft close to the opening; the hybrid transmission further includes a second gear, the second gear is located on one side of the first gear in the radial direction, and the first gear is meshed with the second gear.
[0014] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a hybrid transmission. The motor shaft of the hybrid transmission has a cooling cavity inside, and the cooling cavity is used to pass a cooling medium. The cooling medium can be cooling oil, etc., which can cool and dissipate heat from the motor shaft and lubricate the motor shaft. The cooling cavity has an opening at one end in the axial direction of the motor shaft, and the cover body of the hybrid transmission is covered on the opening. The hybrid transmission also includes a buffer, which is arranged between the motor shaft and the cover body in the radial direction of the motor shaft. The buffer can play a buffering role between the motor shaft and the cover body, reducing the influence of the eccentric force generated by the gear connection relationship of the motor shaft on the connection stability between the motor shaft and the cover body, thereby ensuring the connection stability between the motor shaft and the cover body. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0016] Figure 1 This is a schematic structural diagram of an embodiment of a hybrid transmission of the present application;
[0017] Figure 2 yes Figure 1 The structural schematic diagram of the hybrid transmission area A is shown.
[0018] Description of reference numerals:
[0019] 10 hybrid transmission; 11 motor shaft; 111 cooling chamber; 112 opening; 113 first fixing groove; 114 first gear; 12 cover; 121 second fixing groove; 122 main body; 123 matching portion; 124 through hole; 13 buffer member; 14 second gear. DETAILED DESCRIPTION
[0020] This application provides a hybrid transmission, which is described in detail below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the description of each embodiment has its own emphasis. For details not described in one embodiment, please refer to the relevant descriptions of other embodiments.
[0021] To address the technical issue of poor connection stability between the motor shaft and other components of a hybrid transmission in the prior art, one embodiment of the present application provides a hybrid transmission. The hybrid transmission includes a motor shaft having a cooling chamber therein for passing a cooling medium; the cooling chamber extends axially along the motor shaft and has an opening at one end of the cooling chamber in the axial direction of the motor shaft, wherein the motor shaft also has a radial direction perpendicular to the axial direction. The hybrid transmission also includes a cover body that covers the opening. The hybrid transmission also includes a buffer member that is radially disposed between the motor shaft and the cover body. This is described in detail below.
[0022] See also Figure 1 , Figure 1 It is a structural schematic diagram of an embodiment of a hybrid transmission of the present application.
[0023] In one embodiment, a hybrid transmission 10 includes a motor shaft 11 having a cooling cavity 111 therein. Cooling cavity 111 is configured to pass a cooling medium. The cooling medium, such as cooling oil, is capable of cooling and lubricating motor shaft 11. Specifically, cooling cavity 111 extends along an axial direction X of motor shaft 11 and has an opening 112 at one end thereof along the axial direction X of motor shaft 11. The hybrid transmission 10 also has a radial direction Y perpendicular to the axial direction X of motor shaft 11.
[0024] The hybrid transmission 10 further includes a cover 12, which covers the opening 112. The cover 12 is configured to restrict the cooling medium in the cooling cavity 111 from rapidly flowing out of the opening 112, thereby keeping the cooling medium in the cooling cavity 111 as long as possible, thereby providing long-term cooling and heat dissipation for the motor shaft 11 and ensuring a cooling effect.
[0025] Furthermore, the cover 12 is provided with a through hole 124, which extends through the cover 12 along the axial direction X of the motor shaft 11 and communicates with the cooling chamber 111. By providing the through hole 124 in the cover 12, this embodiment allows the cooling medium in the cooling chamber 111 to flow out through the through hole 124 to cool and lubricate other components of the hybrid transmission 10. Furthermore, because the flow area of the through hole 124 is smaller than the cross-sectional area of the cooling chamber 111 (i.e., the cross-sectional area of the cooling chamber 111 perpendicular to the axial direction X of the motor shaft 11), the flow area of the through hole 124 is smaller, and the rate at which the cooling medium flows out of the through hole 124 is slower. Therefore, this embodiment uses the through hole 124 to limit the rate at which the cooling medium flows out of the cooling chamber 111, thereby preventing the cooling medium from flowing out of the cooling chamber 111 quickly. This allows the cooling medium to remain in the cooling chamber 111 for as long as possible, thereby providing long-term cooling and heat dissipation for the motor shaft 11 and ensuring a cooling effect.
[0026] In one embodiment, a first gear 114 is disposed on the end of the motor shaft 11 near the opening 112. The hybrid transmission 10 further includes a second gear 14 located to one side of the first gear 114 in the radial direction Y. The first gear 114 meshes with the second gear 14 to achieve torque transmission of the motor shaft 11.
[0027] The meshing relationship between the first gear 114 and the second gear 14 on the motor shaft 11 generates an eccentric force, which adversely affects the stability of the connection between the motor shaft 11 and the cover body 12, creating a risk of connection failure between the motor shaft 11 and the cover body 12. In view of this, the hybrid transmission 10 of this embodiment further includes a buffer 13, which is disposed between the motor shaft 11 and the cover body 12 in the radial direction Y. The buffer 13 can act as a buffer between the motor shaft 11 and the cover body 12, reducing the impact of the eccentric force generated by the meshing relationship between the first gear 114 and the second gear 14 on the stability of the connection between the motor shaft 11 and the cover body 12, thereby ensuring the stability of the connection between the motor shaft 11 and the cover body 12.
[0028] Specifically, the cover 12 can be made of metal. The cover 12 is assembled with the motor shaft 11 by press-fitting. The cover 12 is embedded in the cooling cavity 111 through the opening 112. The cover 12 and the motor shaft 11 are interference fit, and the eccentric force generated by the meshing relationship between the first gear 114 and the second gear 14 on the motor shaft 11 will affect the stability of the interference fit between the motor shaft 11 and the cover 12. Therefore, the present embodiment provides a buffer 13, and the cover 12 is embedded in the cooling cavity 111 through the opening 112. The buffer 13 is arranged between the cavity wall of the cooling cavity 111 and the outer wall of the cover 12 in the radial direction Y. The buffer 13 can play a buffering role between the motor shaft 11 and the cover 12, reducing the influence of the eccentric force generated by the meshing relationship between the first gear 114 and the second gear 14 on the stability of the interference fit between the motor shaft 11 and the cover 12, thereby ensuring the connection stability between the motor shaft 11 and the cover 12.
[0029] Furthermore, the cover 12 includes a main body 122 and a mating portion 123. The mating portion 123 is connected to one side of the main body 122 in the axial direction X of the motor shaft 11. The mating portion 123 is matingly connected to the wall of the cooling cavity 111. The buffer member 13 is disposed between the wall of the cooling cavity 111 and the side wall of the mating portion 123 facing away from the main body 122 in the radial direction Y. The aforementioned through hole 124 is defined in the main body 122, and the through hole 124 may be located in the middle of the main body 122.
[0030] Please also refer to Figure 2 , Figure 2 yes Figure 1 The structural schematic diagram of the hybrid transmission area A is shown.
[0031] In one embodiment, a first fixing groove 113 is provided on the wall of the cooling cavity 111 near the opening 112, and the buffer 13 is embedded in the first fixing groove 113. The first fixing groove 113 is configured to fix the position of the buffer 13, specifically to fix the position of the buffer 13 in the axial direction X of the motor shaft 11. In other words, the buffer 13 of this embodiment can play a buffering role between the motor shaft 11 and the cover body 12 in the radial direction Y, and the buffer 13 can also play a role in fixing the relative position between the motor shaft 11 and the cover body 12 in the axial direction X of the motor shaft 11. The first fixing groove 113 is provided on the wall of the cooling cavity 111 near the opening 112, and the position of the buffer 13 in the axial direction X of the motor shaft 11 is fixed by the first fixing groove 113, and the relative position between the motor shaft 11 and the cover body 12 in the axial direction X of the motor shaft 11 is fixed by the buffer 13.
[0032] In one embodiment, the outer side wall of the cover body 12 is provided with a second fixing groove 121, and the buffer 13 is embedded in the second fixing groove 121. The second fixing groove 121 is configured to fix the position of the buffer 13, specifically to fix the position of the buffer 13 in the axial direction X of the motor shaft 11. In other words, the buffer 13 of this embodiment can play a buffering role between the motor shaft 11 and the cover body 12 in the radial direction Y, and the buffer 13 can play a role in fixing the relative position between the motor shaft 11 and the cover body 12 in the axial direction X of the motor shaft 11. The outer side wall of the cover body 12 is provided with a second fixing groove 121, and the position of the buffer 13 in the axial direction X of the motor shaft 11 is fixed by the second fixing groove 121, and the relative position between the motor shaft 11 and the cover body 12 in the axial direction X of the motor shaft 11 is fixed by the buffer 13.
[0033] Furthermore, for the example in which the cover 12 includes a main body portion 122 and a matching portion 123 , the second fixing groove 121 is specifically located on a side wall of the matching portion 123 facing away from the main body portion 122 in the radial direction Y.
[0034] It should be noted that, in the embodiment of the present application, the first fixing groove 113 and the second fixing groove 121 cooperate to fix the position of the buffer member 13 on the axial direction X of the motor shaft 11, and then fix the relative position between the motor shaft 11 and the cover body 12 on the axial direction X of the motor shaft 11 through the buffer member 13.
[0035] In one embodiment, the buffer member 13 is annularly disposed around the outer circumference of the cover 12. In other words, the buffer member 13 of this embodiment is a complete annular structure, which helps to improve the buffering effect of the buffer member 13, further reducing the impact of the eccentric force generated by the gear connection relationship of the motor shaft 11 on the connection stability between the motor shaft 11 and the cover 12, and further ensuring the connection stability between the motor shaft 11 and the cover 12.
[0036] For the example in which the buffer member 13 is a complete annular structure, the first fixing groove 113 and the second fixing groove 121 are both arranged around the outer periphery of the cover body 12, that is, the first fixing groove 113 and the second fixing groove 121 are also complete annular structures, so that the buffer member 13 can be reliably embedded in the first fixing groove 113 and the second fixing groove 121.
[0037] Optionally, the buffer member 13 may be a snap ring, etc., disposed between the motor shaft 11 and the cover 12 in the radial direction Y. The snap ring can act as a buffer between the motor shaft 11 and the cover 12, reducing the effect of the eccentric force generated by the meshing relationship between the first gear 114 and the second gear 14 on the connection stability between the motor shaft 11 and the cover 12. Furthermore, the snap ring has a certain degree of rigidity in the axial direction X of the motor shaft 11. The buffer member 13 can also fix the relative position between the motor shaft 11 and the cover 12 on the basis of the press-fit connection between the cover 12 and the motor shaft 11.
[0038] Alternatively, the buffer member 13 can also be an elastic sealing ring, etc., and the elastic sealing ring can be made of rubber or other materials. Because the elastic sealing ring has elasticity, the elastic sealing ring is arranged between the motor shaft 11 and the cover body 12 in the radial direction Y, and can play a buffering role between the motor shaft 11 and the cover body 12, reducing the influence of the eccentric force generated by the meshing relationship between the first gear 114 and the second gear 14 on the connection stability between the motor shaft 11 and the cover body 12. In addition, the elastic sealing ring can form a seal between the motor shaft 11 and the cover body 12, limiting the cooling medium in the cooling chamber 111 from leaking from between the motor shaft 11 and the cover body 12, and making the cooling medium flow out from the through hole 124 on the cover body 12 as much as possible, and then can limit the rate at which the cooling medium flows out from the through hole 124 through the through hole 124, limiting the cooling medium in the cooling chamber 111 from flowing out quickly from the through hole 124, so that the cooling medium is kept in the cooling chamber 111 as long as possible, so as to cool and dissipate heat for a long time to the motor shaft 11, and ensure the cooling effect.
[0039] In summary, the present application provides a hybrid transmission. The motor shaft of the hybrid transmission has a cooling cavity inside, and the cooling cavity is used to pass a cooling medium. The cooling medium can be cooling oil, etc., which can cool and dissipate heat from the motor shaft and lubricate the motor shaft. The cooling cavity has an opening at one end in the axial direction of the motor shaft, and the cover body of the hybrid transmission is covered on the opening. The hybrid transmission also includes a buffer, which is arranged between the motor shaft and the cover body in the radial direction of the motor shaft. The buffer can play a buffering role between the motor shaft and the cover body, reducing the influence of the eccentric force generated by the gear connection relationship of the motor shaft on the connection stability between the motor shaft and the cover body, thereby ensuring the connection stability between the motor shaft and the cover body.
[0040] The above is a detailed introduction to the hybrid transmission provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A hybrid transmission, characterized in that: include: A motor shaft having a cooling cavity therein for passing a cooling medium; The cooling cavity extends along the axial direction of the motor shaft, and one end of the cooling cavity in the axial direction of the motor shaft is open, wherein the motor shaft also has a radial direction perpendicular to the axial direction; a cover body, covering the opening; and A buffer member is arranged between the motor shaft and the cover in the radial direction.
2. The hybrid transmission according to claim 1, characterized in that: The cover is embedded in the cooling cavity via the opening, and the buffer is arranged between the cavity wall of the cooling cavity and the outer side wall of the cover in the radial direction.
3. The hybrid transmission according to claim 2, characterized in that: A first fixing groove is provided on a cavity wall of the cooling cavity close to the opening, and the buffer component is embedded in the first fixing groove. The first fixing groove is configured to fix the position of the buffer component.
4. The hybrid transmission according to claim 2, characterized in that: The outer side wall of the cover body is provided with a second fixing groove, the buffer component is embedded in the second fixing groove, and the second fixing groove is configured to fix the position of the buffer component.
5. The hybrid transmission according to claim 2, characterized in that: The cover body includes a main body and a matching part, the matching part is connected to one side of the main body in the axial direction of the motor shaft, the matching part is matched with the cavity wall of the cooling cavity, and the buffer part is arranged between the cavity wall of the cooling cavity and the side wall of the matching part facing away from the main body in the radial direction.
6. The hybrid transmission according to any one of claims 1 to 5, characterized in that: The buffer member is arranged around the outer periphery of the cover body.
7. The hybrid transmission according to any one of claims 1 to 5, characterized in that: The buffer member is a snap ring.
8. The hybrid transmission according to any one of claims 1 to 5, characterized in that: The buffer member is an elastic sealing ring.
9. The hybrid transmission according to any one of claims 1 to 5, characterized in that: The cover body is provided with a through hole, the through hole is arranged to pass through the cover body along the axial direction of the motor shaft, and the through hole is communicated with the cooling cavity.
10. The hybrid transmission according to any one of claims 1 to 5, characterized in that: A first gear is provided on the end of the motor shaft close to the opening; The hybrid transmission further includes a second gear located on one side of the first gear in the radial direction, the first gear meshing with the second gear.