Hybrid power transmission

Abstract

The utility model relates to the technical field of transmissions, and discloses a hybrid power transmission. The hybrid power transmission comprises a transmission shell, and a grounding cavity is formed in the transmission shell. The hybrid power transmission further comprises a motor shaft. The hybrid power transmission further comprises a grounding assembly, and the grounding assembly is embedded into the grounding cavity and electrically connected with the motor shaft. The hybrid power transmission further comprises a grounding terminal, the grounding terminal is clamped between the grounding assembly and the inner wall of the grounding cavity, and the grounding terminal is electrically connected with the transmission shell and the grounding assembly. In this way, the assembly process of the hybrid power transmission can be simplified, and the cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of transmissions, and in particular to a hybrid transmission. Background Art

[0002] Drive motors are widely used in the automotive industry, such as dedicated hybrid transmissions (DHTs). With the development of the automotive industry, higher requirements are being placed on the service life and operational stability of drive motors. During operation, the drive motor generates shaft current, which is transmitted through the motor shaft to the motor bearings and other components, causing problems such as electrical corrosion in the bearings and other components. Therefore, current hybrid transmissions typically employ a design where the motor shaft is grounded.

[0003] However, the current motor shaft grounding solution usually requires bolt holes to be opened in the transmission housing and the motor shaft grounding design is achieved through bolts, which requires sealing of the bolt hole position. In addition, the current motor shaft grounding solution has a complex assembly process and high parts cost. Utility Model Content

[0004] The present application provides a hybrid transmission, which can simplify the assembly process of the hybrid transmission and reduce costs.

[0005] The present application provides a hybrid transmission. The hybrid transmission includes a transmission housing having a grounding cavity disposed therein. The hybrid transmission also includes a motor shaft. The hybrid transmission also includes a grounding assembly embedded in the grounding cavity and electrically connected to the motor shaft. The hybrid transmission also includes a grounding terminal disposed between the grounding assembly and an inner wall of the grounding cavity, and electrically connected to the transmission housing and the grounding assembly, respectively.

[0006] In one embodiment of the present application, the transmission housing includes a grounding portion and a guide portion which are integrated with each other. The guide portion is connected to the side of the grounding portion close to the motor shaft, and the guide portion is arranged around the outer periphery of the grounding portion. The grounding portion and the guide portion cooperate to enclose a grounding cavity. The end of the grounding cavity away from the grounding portion has an opening, and the grounding component is embedded in the grounding cavity from the opening; wherein, the grounding terminal is clamped between the grounding component and the grounding portion.

[0007] In one embodiment of the present application, the grounding cavity extends along the axial direction of the motor shaft to guide the grounding component to be embedded into the grounding cavity along the axial direction of the motor shaft.

[0008] In one embodiment of the present application, a guide rib is protruded from the outer wall of the grounding component, and the guide rib is embedded in the grounding cavity. The guide rib cooperates with the guide portion to guide the grounding component to be embedded in the grounding cavity along the axial direction of the motor shaft.

[0009] In an embodiment of the present application, the hybrid transmission further includes: a limiting member disposed in the grounding cavity, wherein the limiting member is configured to fix the grounding assembly in the grounding cavity.

[0010] In one embodiment of the present application, a guide rib is protruded from the outer wall of the grounding assembly, and the guide rib abuts against the side of the limiting member facing the grounding portion. The guide rib cooperates with the limiting member to fix the grounding assembly in the grounding cavity.

[0011] In one embodiment of the present application, the limiting member is a snap ring or a wave spring.

[0012] In one embodiment of the present application, the limiting member is disposed close to the opening.

[0013] In one embodiment of the present application, the hybrid transmission further includes: a grounding plate, which is arranged on the motor shaft, and the grounding component abuts against the grounding plate, so that the grounding component is electrically connected to the motor shaft through the grounding plate.

[0014] In one embodiment of the present application, the grounding assembly includes: a shell, an installation cavity with an opening at one end of which is provided inside; a grounding member, movably provided in the installation cavity, and at least a portion of the grounding member extends from the opening and is electrically connected to the motor shaft; an elastic member, provided in the installation cavity, and the elastic member is respectively connected to the shell and the grounding member, and the elastic member is configured to drive the grounding member to extend from the opening; and a conductive member, one end of which is electrically connected to the grounding member, and the other end of which extends from the end of the shell away from the opening and is electrically connected to the grounding terminal.

[0015] The beneficial effects of the present application are as follows: unlike the prior art, the present application provides a hybrid transmission. The hybrid transmission has a grounding cavity disposed within its transmission housing, a grounding assembly embedded within the grounding cavity, and a grounding terminal clamped between the grounding assembly and the inner wall of the grounding cavity. This avoids the prior art approach of having bolt holes in the transmission housing, eliminates the risk of transmission housing leakage, and eliminates the bolt hole sealing step in the prior art assembly process, thereby simplifying the assembly process of the hybrid transmission. Furthermore, the omission of bolts and bolt holes reduces component costs, thereby reducing the manufacturing cost of the hybrid transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 This is a schematic structural diagram of an embodiment of a hybrid transmission of the present application;

[0018] Figure 2 It is a structural schematic diagram of another embodiment of the hybrid transmission of the present application.

[0019] Description of reference numerals:

[0020] 10 hybrid transmission; 11 transmission housing; 111 grounding cavity; 112 grounding portion; 113 guide portion; 114 opening; 12 motor shaft; 121 oil storage cavity; 13 grounding assembly; 131 guide rib; 132 housing; 133 mounting cavity; 134 opening; 135 grounding member; 136 elastic member; 137 conductive member; 14 grounding terminal; 15 limit member; 16 grounding plate. DETAILED DESCRIPTION

[0021] 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.

[0022] To address the technical issues of complex assembly processes and high costs associated with hybrid transmissions in the prior art, one embodiment of the present application provides a hybrid transmission. The hybrid transmission includes a transmission housing having a grounding cavity disposed therein. The hybrid transmission also includes a motor shaft. The hybrid transmission also includes a grounding assembly embedded within the grounding cavity and electrically connected to the motor shaft. The hybrid transmission also includes a grounding terminal disposed between the grounding assembly and the inner wall of the grounding cavity, and electrically connected to the transmission housing and the grounding assembly, respectively. This is described in detail below.

[0023] See also Figure 1 , Figure 1 It is a structural schematic diagram of an embodiment of a hybrid transmission of the present application.

[0024] In one embodiment, the hybrid transmission 10 includes a transmission housing 11, and a grounding cavity 111 is provided inside the transmission housing 11. The hybrid transmission 10 also includes a motor shaft 12. Specifically, the motor shaft 12 can be provided inside the transmission housing 11. The hybrid transmission 10 also includes a grounding component 13, which is embedded in the grounding cavity 111 and is electrically connected to the motor shaft 12. The hybrid transmission 10 also includes a grounding terminal 14, which is sandwiched between the grounding component 13 and the inner wall of the grounding cavity 111, and is electrically connected to the transmission housing 11 and the grounding component 13, respectively. The motor shaft 12 passes through the grounding component 13, the grounding terminal 14 and the transmission housing 11 in sequence, thereby realizing the grounding design of the motor shaft 12.

[0025] The prior art motor shaft grounding scheme usually requires the transmission housing to have bolt holes, and the motor shaft is grounded by bolts. Due to sealing requirements, the bolts need to be sealed with sealant or other sealing treatments to ensure that the bolts do not leak oil. This results in a complex assembly process and high parts cost for the prior art motor shaft grounding scheme. In contrast, the transmission housing 11 of the hybrid transmission 10 of this embodiment is internally provided with a grounding cavity 111, the grounding assembly 13 is embedded in the grounding cavity 111, and the grounding terminal 14 is sandwiched between the grounding assembly 13 and the inner wall of the grounding cavity 111. This avoids the prior art scheme of having bolt holes in the transmission housing 11, eliminates the risk of leakage in the transmission housing 11, and eliminates the bolt hole sealing process in the prior art assembly process. This simplifies the assembly process of the hybrid transmission 10, and because the bolts and bolt holes are omitted, the parts cost can be saved, thereby reducing the manufacturing cost of the hybrid transmission 10.

[0026] Furthermore, the hybrid transmission 10 further includes a grounding plate 16 , which is disposed on the motor shaft 12 . The grounding assembly 13 abuts against the grounding plate 16 , such that the grounding assembly 13 is electrically connected to the motor shaft 12 through the grounding plate 16 .

[0027] For example, the motor shaft 12 is provided with an oil reservoir 121 extending axially therethrough. The oil reservoir 121 is used to pass cooling oil through the motor shaft 12 for cooling, heat dissipation, and lubrication. To facilitate electrical connection between the grounding assembly 13 and the motor shaft 12, this embodiment includes a grounding plate 16. The end of the motor shaft 12 is provided with a stepped structure, and the grounding plate 16 is assembled on the stepped structure. The grounding assembly 13 abuts against the grounding plate 16 to be electrically connected to the grounding plate 16, and is then electrically connected to the motor shaft 12 through the grounding plate 16.

[0028] In one embodiment, the grounding assembly 13 includes a housing 132, a grounding member 135, an elastic member 136, and a conductive member 137. The housing 132 includes a mounting cavity 133 having an opening 134 at one end. The grounding member 135 is movably disposed in the mounting cavity 133, and at least a portion of the grounding member 135 extends from the opening 134 and is electrically connected to the motor shaft 12. Specifically, the grounding member 135 is electrically connected to the grounding plate 16. The elastic member 136 is disposed in the mounting cavity 133 and is connected to the housing 132 and the grounding member 135, respectively. The elastic member 136 is configured to force the grounding member 135 to extend from the opening 134. The elastic member 136 may be a compression spring, etc. One end of the conductive member 137 is electrically connected to the grounding member 135, and the other end of the conductive member 137 extends from the end of the housing 132 away from the opening 134 and is electrically connected to the ground terminal 14. The conductive member 137 may be a wire, etc.

[0029] In one embodiment, the transmission housing 11 includes an integral grounding portion 112 and a guide portion 113. The guide portion 113 is connected to the side of the grounding portion 112 proximal to the motor shaft 12 and surrounds the outer periphery of the grounding portion 112. The grounding portion 112 and the guide portion 113 cooperate to define a grounding cavity 111. The end of the grounding cavity 111 distal to the grounding portion 112 has an opening 114, and the grounding assembly 13 is inserted into the grounding cavity 111 through the opening 114. A grounding terminal 14 is interposed between the grounding assembly 13 and the grounding portion 112.

[0030] In the above manner, the grounding cavity 111 is enclosed by the grounding portion 112 and the guide portion 113 which are an integral structure. The transmission housing 11 avoids the design of opening bolt holes in the prior art, so that the transmission housing 11 is a whole, thereby avoiding the risk of oil leakage at the bolt holes in the prior art.

[0031] Of course, in other embodiments of the present application, the ground terminal 14 is not limited to being sandwiched between the ground component 13 and the ground portion 112. For example, the ground terminal 14 can also be sandwiched between the ground component 13 and the guide portion 113. The present embodiment is described using the example of the ground terminal 14 being sandwiched between the ground component 13 and the ground portion 112. This is for illustrative purposes only and is not intended to be limiting.

[0032] In one embodiment, the grounding cavity 111 extends axially along the motor shaft 12 to guide the grounding assembly 13 into the grounding cavity 111 along the axial direction of the motor shaft 12. Furthermore, a guide rib 131 is provided on the outer wall of the grounding assembly 13. The guide rib 131 is embedded in the grounding cavity 111. The guide rib 131 cooperates with the guide portion 113 to guide the grounding assembly 13 into the grounding cavity 111 along the axial direction of the motor shaft 12.

[0033] Optionally, the guide rib 131 may be a complete annular structure extending along the circumference of the grounding component 13; or, there may be multiple guide ribs 131, each guide rib 131 being distributed at intervals along the circumference of the grounding component 13, which is not limited here.

[0034] In one embodiment, the hybrid transmission 10 further includes a limiting member 15 . The limiting member 15 is disposed in the grounding cavity 111 . The limiting member 15 is configured to fix the grounding assembly 13 in the grounding cavity 111 .

[0035] Specifically, a guide rib 131 on the grounding assembly 13 abuts the side of the retaining member 15 facing the grounding portion 112. The guide rib 131 and the retaining member 15 cooperate to secure the grounding assembly 13 within the grounding cavity 111. Because the guide rib 131 abuts the retaining member 15, the retaining member 15 limits the axial position of the grounding assembly 13 on the motor shaft 12 via the guide rib 131, preventing the grounding assembly 13 from escaping from the grounding cavity 111 through the opening 114. Furthermore, in the axial direction of the motor shaft 12, one end of the grounding assembly 13 presses the grounding terminal 14 against the grounding portion 112 of the transmission housing 11. The grounding assembly 13 also abuts the retaining member 15 via the guide rib 131. Thus, the grounding portion 112 and the retaining member 15 cooperate to limit the axial position of the grounding assembly 13 on the motor shaft 12, thereby securing the grounding assembly 13. Furthermore, the retaining member 15 is positioned near the opening 114.

[0036] In one embodiment, if Figure 1 As shown, the limiting member 15 can be a snap ring, etc. The snap ring is clamped in the grounding cavity 111 and cooperates with the grounding portion 112 of the transmission housing 11 to limit the axial position of the grounding assembly 13 on the motor shaft 12, thereby fixing the grounding assembly 13.

[0037] In an alternative embodiment, if Figure 2 As shown, the limiting member 15 may be a wave spring, etc. The wave spring is clamped in the grounding cavity 111. The wave spring cooperates with the grounding portion 112 of the transmission housing 11 to limit the axial position of the grounding assembly 13 with respect to the motor shaft 12, thereby securing the grounding assembly 13. Furthermore, the wave spring can provide a certain preload force, further ensuring that the grounding assembly 13 is reliably and stably fixed in the grounding cavity 111.

[0038] It should be noted that the grounding component 13 described in this embodiment has been described in detail in the above embodiments and will not be repeated here.

[0039] In summary, the present application provides a hybrid transmission. The hybrid transmission has a grounding cavity disposed within its transmission housing, a grounding assembly embedded within the cavity, and a grounding terminal clamped between the grounding assembly and the inner wall of the cavity. This avoids the conventional method of having bolt holes in the transmission housing, eliminates the risk of leakage in the transmission housing, and eliminates the bolt hole sealing step in the conventional assembly process. This simplifies the assembly process of the hybrid transmission. Furthermore, the omission of bolts and bolt holes reduces component costs, thereby reducing the manufacturing cost of the hybrid transmission.

[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 transmission housing having a grounding cavity disposed therein; Motor shaft; a grounding component, embedded in the grounding cavity and electrically connected to the motor shaft; as well as A grounding terminal is sandwiched between the grounding component and the inner wall of the grounding cavity, and the grounding terminal is electrically connected to the transmission housing and the grounding component respectively.

2. The hybrid transmission according to claim 1, characterized in that: The transmission housing includes a grounding portion and a guide portion that are integrally structured with each other, the guide portion being connected to a side of the grounding portion close to the motor shaft and being disposed around the outer periphery of the grounding portion, the grounding portion and the guide portion cooperating to enclose a grounding cavity, the grounding cavity having an opening at an end away from the grounding portion, and the grounding assembly being inserted into the grounding cavity through the opening; Wherein, the grounding terminal is clamped between the grounding component and the grounding portion.

3. The hybrid transmission according to claim 1, characterized in that: The grounding cavity extends along the axial direction of the motor shaft to guide the grounding component to be embedded into the grounding cavity along the axial direction of the motor shaft.

4. The hybrid transmission according to claim 2, characterized in that: The outer side wall of the grounding component is provided with a guide rib, which is embedded in the grounding cavity. The guide rib cooperates with the guide portion to guide the grounding component to be embedded in the grounding cavity along the axial direction of the motor shaft.

5. The hybrid transmission according to claim 2, characterized in that: The hybrid transmission further comprises: A limiting member is disposed in the grounding cavity, and the limiting member is configured to fix the grounding assembly in the grounding cavity.

6. The hybrid transmission according to claim 5, characterized in that: The outer side wall of the grounding assembly is provided with a guide rib, which abuts against a side of the limiting member facing the grounding portion. The guide rib cooperates with the limiting member to fix the grounding assembly in the grounding cavity.

7. The hybrid transmission according to claim 5, characterized in that: The limiting member is a snap ring or a wave spring.

8. The hybrid transmission according to claim 5, characterized in that: The limiting member is arranged close to the opening.

9. The hybrid transmission according to claim 1, characterized in that: The hybrid transmission further comprises: A grounding plate is provided on the motor shaft, and the grounding component abuts against the grounding plate, so that the grounding component is electrically connected to the motor shaft through the grounding plate.

10. The hybrid transmission according to claim 1, wherein: The grounding assembly includes: The housing has an interior provided with a mounting cavity with an open end; a grounding member movably disposed in the mounting cavity, with at least a portion of the grounding member extending from the opening to be electrically connected to the motor shaft; an elastic member disposed in the mounting cavity, the elastic member being connected to the housing and the grounding member respectively, and the elastic member being configured to drive the grounding member to extend from the opening; and A conductive member has one end electrically connected to the grounding member, and the other end extends from an end of the housing away from the opening and electrically connected to the grounding terminal.

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