Gear ring, speed reducer, driving assembly and vehicle

Abstract

The gear ring comprises a body, the body is provided with an inner ring and an outer ring, the inner ring is provided with first combination teeth, and the outer ring is provided with second combination teeth; the body comprises a combination part which is suitable for being combined with an external mechanism; the combination part is arranged on the inner ring, and the first combination teeth are sequentially arranged in the axial direction; or the combination part is arranged on the axial end face of the body. According to the gear ring, the combination part is arranged on the inner ring of the gear ring or the axial end face of the gear ring, and external mechanisms such as a clutch, a synchronizer and a brake can be combined with the combination part, so that locking of the gear ring or coupling of the gear ring and other components is achieved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of reducers, and in particular to a gear ring, a reducer, a drive assembly and a vehicle. Background Art

[0002] Miniaturization, lightweight and integration are the future trends of vehicle drive assemblies. The integration of reducers is an important component. The benefits of high integration are obvious, such as reducing the volume of the drive assembly and reducing the total weight of the system. Higher integration also means lower production costs.

[0003] The use of a planetary gear structure in a reducer can achieve multi-stage reduction in speed. The planetary gear structure includes a ring gear. In order to improve the degree of integration, the related technology provides coupling teeth on both the radial inner and outer sides of the ring gear, so that both the inner and outer sides of the ring gear can be connected to the gear transmission to achieve the input or output of the ring gear. However, when the ring gear needs to be locked, or when the ring gear needs to be coupled with other components to achieve gear shifting, the ring gear with coupling teeth on both the inner and outer sides is difficult to lock or couple with other components. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the background technology, it is desired to provide a ring gear, a reducer, a drive assembly and a vehicle.

[0005] According to a first aspect of the present application, a gear ring is provided, comprising: a main body, the main body having an inner ring and an outer ring, the inner ring being provided with a first coupling tooth, and the outer ring being provided with a second coupling tooth; the main body comprising a coupling portion, the coupling portion being suitable for coupling with an external mechanism; the coupling portion being arranged on the inner ring and arranged in sequence with the first coupling tooth in the axial direction; or the coupling portion being arranged on the axial end face of the main body.

[0006] As an implementable manner, the body includes a first part and a second part sequentially connected in the axial direction, the first coupling teeth are arranged on the inner ring of the first part, and the second coupling teeth are arranged on the outer ring of the second part.

[0007] As an achievable manner, the coupling portion includes a spline segment suitable for coupling with an external mechanism.

[0008] As an implementable manner, the coupling portion is arranged on the axial end surface of the body, and the coupling portion includes an annular protrusion extending in the axial direction of the body and a spline segment arranged in the radial direction of the annular protrusion.

[0009] As a feasible manner, the coupling portion is arranged on the inner ring and is arranged sequentially with the first coupling tooth in the axial direction.

[0010] As an implementable manner, the second coupling tooth and the coupling portion are arranged opposite to each other in the radial direction.

[0011] As an achievable method, it also includes a support position, which is suitable for supporting the bearing, and the support position is arranged on the inner ring and arranged in sequence with the first combining tooth in the axial direction; and / or, the support position is arranged on the outer ring and arranged in sequence with the second combining tooth in the axial direction.

[0012] As a feasible manner, the support position is arranged on the outer ring and is arranged in sequence with the second combining tooth in the axial direction, and the support position and the first combining tooth are arranged opposite to each other in the radial direction.

[0013] A second aspect of the present application provides a reducer comprising the ring gear of the first aspect.

[0014] As a feasible method, the reducer includes a planetary carrier, a sun gear and a ring gear. The ring gear and the sun gear selectively rotate synchronously through a coupling mechanism. A first clutch is provided between the sun gear and the housing, with the ring gear as the input end and the planetary carrier as the output end. The first clutch is configured to enable the sun gear to rotate freely in a first direction while limiting the sun gear from rotating in a second direction.

[0015] As an implementable manner, the first clutch is configured to simultaneously restrict the sun gear from rotating in the first direction and the second direction.

[0016] As a feasible method, it also includes multiple double planetary gears, which are arranged on the planetary carrier, one of the gears in each double planetary gear is drivingly connected to the first combining tooth on the ring gear, and the other gear in each double planetary gear is drivingly connected to the sun gear.

[0017] As an implementable manner, a second clutch is further included, and the coupling portion can be selectively connected to the sun gear or the planet carrier through the second clutch.

[0018] As an achievable manner, the double planetary gear comprises a planetary gear shaft, a first planetary gear and a second planetary gear, wherein the first planetary gear and the second planetary gear are connected to the planetary gear shaft between the first planetary gear and the second planetary gear.

[0019] A third aspect of the present application provides a drive assembly comprising the reducer of the second aspect.

[0020] A fourth aspect of the present application provides a vehicle comprising the drive assembly of the third aspect.

[0021] The present application provides a ring gear, a reducer, a drive assembly and a vehicle. By setting a coupling portion on the inner ring of the ring gear or on the axial end face of the ring gear, an external mechanism such as a clutch, a synchronizer, a brake, etc. can be combined with the coupling portion to achieve locking of the ring gear or coupling of the ring gear with other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings;

[0023] Figure 1 A reducer according to an embodiment of the present application;

[0024] Figure 2 A reducer according to another embodiment of the present application;

[0025] Figure 3 A reducer according to another embodiment of the present application;

[0026] Figure 4 A gear ring structure according to an embodiment of the present application;

[0027] Figure 5 A gear ring structure according to another embodiment of the present application is provided.

[0028] In the figure,

[0029] 10. Inner ring, 11. First engagement tooth,

[0030] 20. Outer ring, 21. Second engagement tooth,

[0031] 30. Joint, 31. Spline segment, 32. Support position, 33. Annular raised portion,

[0032] 50. First part, 51. Second part, 52. Bearing,

[0033] 60. Ring gear, 61. Planet carrier, 62. Sun gear, 63. Double planet gear, 64. First planet gear, 65. Second planet gear, 66. Planet gear shaft, 67. Intermediate shaft, 68. Sun gear shaft,

[0034] 70, first clutch, 71, second clutch,

[0035] 80. Reducer, 81. Differential, 82. Electric motor. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below in conjunction with the accompanying drawings and implementation methods. It is to be understood that the present application can be implemented in various forms and should not be limited by the implementation methods described herein. On the contrary, these implementation methods are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art. It is also necessary to explain that, for ease of description, only the parts related to the present application are shown in the accompanying drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] Embodiments of the present application provide a ring gear, a reducer, a drive assembly and a vehicle.

[0039] In a first aspect, an embodiment of the present application provides a ring gear 60. Figure 1-Figure 3 As shown, the gear ring 60 includes a body, which is annular as a whole, and has an inner ring 10 and an outer ring 20. The inner ring 10 is provided with a first combination tooth 11, and the outer ring 20 is provided with a second combination tooth 21. The first combination tooth 11 and the second combination tooth 21 are used to connect with the gear transmission to realize the input or output of the gear ring 60. The body includes a coupling portion 30, which is suitable for coupling with an external mechanism, and the external mechanism can be a clutch, a synchronizer, a brake, etc. The coupling portion 30 is arranged on the inner ring 10 and is arranged in sequence with the first combination tooth 11 in the axial direction, or the coupling portion 30 is arranged on the axial end surface of the body.

[0040] The coupling part 30 can be arranged on the inner ring 10 or on the axial end face. For the sake of integration, the space between the housing and the gear ring 60 is usually small. The bearing 52 needs to be arranged in the small space to support the gear ring 60. In addition, the second coupling tooth 21 is arranged on the outer ring 20 of the gear ring 60, and there is no extra space for the coupling part 30 on the outer ring 20. Therefore, the coupling part 30 is arranged on the inner ring 10 or the axial end face of the body, which can solve the technical problem that the gear ring 60 is difficult to lock or difficult to couple with other components in the background technology. Other components can be planetary gears, sun gears 62, planet carriers 61, etc.

[0041] Preferably, the coupling portion 30 is arranged on the inner ring 10, and is arranged in sequence with the first coupling tooth 11 in the axial direction. The coupling portion 30 is suitable for coupling with an external mechanism, and the first coupling tooth 11 is suitable for connecting with a gear transmission. Therefore, the coupling portion 30 and the first coupling tooth 11 are arranged in sequence, and the coupling portion 30 and the first coupling tooth 11 are not arranged in a close relationship in the axial direction to avoid mutual interference between different transmission mechanisms; the coupling portion 30 and the first coupling tooth 11 are arranged in sequence, and the coupling portion 30 and the first coupling tooth 11 are arranged in a close relationship in the axial direction to improve the integration. By arranging the coupling portion 30 on the inner ring 10, the external mechanism can achieve the locking of the gear ring 60 or the coupling of the gear ring 60 with other components by coupling with the coupling portion 30 of the inner ring 10.

[0042] The gear ring 60 provided in this embodiment is provided with a coupling portion 30 on the axial end face of the inner ring 10 or the main body, so that an external mechanism can be coupled with the coupling portion 30 on the outer ring 20 or the axial end face of the main body to achieve locking of the gear ring 60 or coupling with other components.

[0043] As an achievable manner, the body includes a first part 50 and a second part 51 connected in sequence in the axial direction, the first coupling tooth 11 is arranged on the inner ring 10 of the first part 50, and the second coupling tooth 21 is arranged on the outer ring 20 of the second part 51. The first coupling tooth 11 and the second coupling tooth 21 are respectively arranged on the two parts connected in sequence, which can ensure that only one coupling tooth is processed on the inner ring 10 or the outer ring 20 of the first part 50 and the second part 51, thereby improving the structural strength of the gear ring 60 and simplifying the production and processing technology. As an achievable manner, the coupling portion 30 includes a spline segment 31, and the spline segment 31 is suitable for coupling with the spline segment 31 on the external mechanism, so that the gear ring 60 can be locked or coupled with other components.

[0044] As an achievable manner, the coupling portion 30 is arranged on the axial end face of the body, the coupling portion 30 includes an annular protrusion 33 extending in the axial direction of the body, the spline segment 31 is arranged in the radial direction of the annular protrusion 33, and the spline segment 31 can be arranged on the inner side of the radial direction of the annular protrusion 33 or on the outer side of the radial direction of the annular protrusion 33. When there is insufficient space between the inner ring 10 and the outer ring 20 of the gear ring 60, the annular protrusion 33 can be arranged on the axial end face of the body, and the spline segment 31 can be arranged on the inner side or the outer side of the annular protrusion 33 to be combined with an external mechanism, so as to realize the locking of the gear ring 60 or the coupling of the gear ring 60 with other components.

[0045] As a feasible method, the coupling portion is arranged on the inner ring 10 and arranged sequentially with the first coupling tooth 11 in the axial direction. This arrangement can avoid interference with the first coupling tooth 11 and the second coupling tooth 21 and maximize the use of the space of the inner ring 10 of the gear ring 60.

[0046] Preferably, the second combining tooth 21 and the combining portion 30 are arranged opposite to each other in the radial direction, that is, the second combining tooth 21 and the combining portion 30 are arranged on the inner and outer sides of the same part of the gear ring 60 body to reduce the axial length of the gear ring 60 and improve the stability of the gear ring 60 structure.

[0047] It should be noted that the coupling portion 30 generally includes a spline segment 31 for coupling with other components, and the second coupling tooth 21 is used for meshing transmission. The spline segment 31 has a simpler structure than the second coupling tooth 21, so even if the second coupling tooth 21 and the coupling portion 30 are arranged relative to each other in the radial direction, it will not cause processing difficulties. At the same time, in the embodiment of the present application, the first coupling tooth 11 and the second coupling tooth 21 are respectively arranged on the first part 50 and the second part 51 connected in sequence in the axial direction, and the first coupling tooth 11 and the second coupling tooth 21 are not arranged relative to each other in the radial direction, so as to avoid the processing difficulties that occur when the first coupling tooth 11 and the second coupling tooth 21 are relative to each other in the radial direction.

[0048] As an achievable method, the gear ring 60 body further includes a support position 32, which is suitable for supporting the bearing 52. The support position 32 is arranged on the inner ring 10 and is sequentially arranged with the first combined teeth 11 in the axial direction, or the support position 32 is arranged on the outer ring 20 and is sequentially arranged with the second combined teeth 21 in the axial direction. The support position 32 is suitable for installing the bearing 52, and the gear ring 60 is supported on the housing of the reducer 80 through the bearing 52. The bearing 52 can be arranged on the inner ring 10 of the gear ring 60, or on the outer ring 20 of the gear ring 60, so as to fix the gear ring 60.

[0049] Among them, the support position 32 is not limited to one, and multiple support positions 32 can be set in the inner ring 10 or the outer ring 20 as needed, such as Figure 3 As shown, support positions 32 may be provided on both the inner ring 10 and the outer ring 20 to make the transmission of the gear ring 60 more stable.

[0050] As a feasible method, the support position 32 is arranged on the outer ring 20 and is arranged in sequence with the second combining tooth 21 in the axial direction. The support position 32 and the first combining tooth 11 are arranged relative to each other in the radial direction. The ring gear 60 transmits power to the gear through the first combining tooth 11. By arranging the bearing 52 in the radial direction, the vibration generated by the ring gear 60 during the transmission process can be reduced and the noise can be reduced.

[0051] In a second aspect, an embodiment of the present application provides a reducer 80 , comprising the ring gear 60 of the first aspect, wherein the ring gear 60 can be locked or coupled with other components to achieve gear shifting of the reducer 80 .

[0052] As a feasible method, the reducer 80 also includes a sun gear 62, a planetary carrier 61 and a ring gear 60. The ring gear 60 and the sun gear 62 selectively rotate synchronously through a coupling mechanism. The coupling mechanism includes a clutch, a synchronizer, etc. A first clutch 70 is arranged between the sun gear 62 and the housing. The ring gear 60 is the input end, and the planetary carrier 61 is the output end. The first clutch 70 is configured to enable the sun gear 62 to rotate freely in a first direction, while limiting the sun gear 62 from rotating in a second direction.

[0053] That is, the first clutch 70 can unidirectionally lock the sun gear 62 and restrict the sun gear 62 to rotate in only one direction, that is, restrict the sun gear to rotate in only the clockwise direction or in only the counterclockwise direction.

[0054] As an implementable manner, the first clutch 70 is configured to restrict the sun gear 62 from rotating in the first direction and the second direction at the same time; that is, the first clutch 70 can also perform bidirectional locking on the sun gear 62 .

[0055] The first clutch 70 specifically selects whether to perform one-way locking or two-way locking on the sun gear 62. When performing one-way locking, the specific locking direction can be selected according to actual conditions. For example, when the ring gear 60 is input and the planet carrier 61 is output, the first clutch 70 performs one-way locking on the sun gear 62 and restricts the sun gear 62 from rotating in the direction opposite to the rotation direction of the ring gear 60, or performs two-way locking on the sun gear 62 to make the sun gear 62 stationary.

[0056] As an achievable manner, a second clutch 71 is further included, and the coupling part 30 can be selectively connected to the sun gear 62 or the planetary carrier 61 through the second clutch 71. In this embodiment, multi-mode switching is achieved through the second clutch 71. Preferably, the coupling part 30 can be selectively connected to the sun gear 62 through the second clutch 71.

[0057] The reducer 80 provided in the embodiment of the present application can realize the following modes:

[0058] Drive first gear: The second clutch 71 is in a non-engaged state. At this time, the ring gear 60 and the sun gear 62 do not rotate synchronously. The power is input from the ring gear 60, decelerated by the planetary gear, output from the planetary carrier 61 to the differential 81, and then output from the differential 81 to the wheels. At this time, the sun gear 62 is subjected to the force in the second direction, driving the sun gear 62 to rotate in the second direction, but at this time the first clutch 70 locks the second direction, so that the sun gear 62 remains stationary. At this time, although the sun gear 62 has the ability to rotate in the first direction, it is not subjected to the force of rotation in the first direction, so it will not rotate in the first direction.

[0059] When an upshift operation is required, the second clutch 71 can directly go from a released state to an engaged state at a certain speed. When the second clutch 71 is engaged, the upshift is completed, and the downshift process is the opposite.

[0060] Driving the second gear: the second clutch 71 is in the engaged state, the ring gear 60 and the sun gear 62 rotate synchronously, and the rotation speeds of the planetary gear components are the same, which is equivalent to an integral component. At this time, there is no deceleration effect. The state of the first clutch 70 is consistent with the state when driving the first gear. At this time, the sun gear 62 is subjected to the force of rotation in the first direction and rotates in the first direction.

[0061] Reverse gear: The second clutch 71 is in a non-engaged state, and the first clutch 70 can be switched to a two-way locking state. At this time, there is no gear shift in the reverse gear. At this time, the planetary gear plays a deceleration role, and the sun gear 62 is locked. The first clutch 70 can also be switched to a one-way locking state, so that the reverse gear can also be switched.

[0062] Parking: the second clutch 71 is in the engaged state, the first clutch 70 is in the bidirectional locked state, the sun gear 62 is bidirectionally locked, the planetary gear as an integral structure is bidirectionally locked, the transmission shaft of the reducer 80 cannot rotate, and the reducer 80 is locked.

[0063] As a feasible method, the reducer 80 also includes a plurality of double-coupled planetary gears 63, and the plurality of double-coupled planetary gears 63 are arranged on the planetary carrier 61. One of the gears in each double-coupled planetary gear 63 is transmission connected to the first combining tooth 11 on the ring gear 60, and another gear in each double-coupled planetary gear 63 is transmission connected to the sun gear 62, so that the power transmission is smooth and the transmission structure is compact.

[0064] As a feasible method, it also includes a second clutch 71, and the coupling part 30 and the sun gear 62 can be selectively connected through the second clutch 71. When the coupling part 30 and the sun gear 62 are connected through the second clutch 71, the sun gear 62 and the ring gear 60 rotate synchronously; when the coupling part 30 and the sun gear 62 are not connected, the sun gear 62 and the ring gear 60 are transmitted separately.

[0065] As an achievable manner, the double planetary gear 63 includes a planetary gear shaft 66, a first planetary gear 64 and a second planetary gear 65, the first planetary gear 64 and the second planetary gear 65 are connected via the planetary gear shaft 66, and the planet carrier 61 is connected to the planetary gear shaft 66 between the first planetary gear 64 and the second planetary gear 65. Figure 1 As shown, the double planetary gear 63 is supported on the intermediate shaft 67 through the planetary carrier 61, thereby improving the integration. In other embodiments, the planetary carrier 61 is connected to the end of the planetary gear shaft 66, such as Figure 2 and Figure 3 As shown, the planet carrier 61 is connected to the end of the planetary gear shaft 66, one end of which is supported on the sun gear shaft 68, and the other end of which is supported on the intermediate shaft 67, so that the transmission structure is more stable.

[0066] In a third aspect, an embodiment of the present application provides a drive assembly, including the reducer 80 of the second aspect. For example, the drive assembly may be a pure electric assembly or a hybrid power assembly.

[0067] In a fourth aspect, an embodiment of the present application provides a vehicle, including the drive assembly of the third aspect. For example, the vehicle may be an electric vehicle, a hybrid vehicle, a fuel vehicle, etc. Therefore, the vehicle has all the features and advantages of the electric assembly described above, which will not be repeated here. In general, the power system of the vehicle is reliable, the structure is stable, and the service life is long.

[0068] It should be understood that the terms "center", "axial", "circumferential", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0069] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A ring gear, characterized in that: include: ontology, The body has an inner ring and an outer ring, the inner ring is provided with a first coupling tooth, and the outer ring is provided with a second coupling tooth; the body includes a coupling portion, and the coupling portion is suitable for coupling with an external mechanism; The coupling portion is arranged on the inner ring and is arranged in sequence with the first coupling teeth in the axial direction; or, the coupling portion is arranged on the axial end surface of the body.

2. The ring gear according to claim 1, characterized in that: The body includes a first part and a second part which are sequentially connected in an axial direction, the first combining teeth are arranged on an inner ring of the first part, and the second combining teeth are arranged on an outer ring of the second part.

3. The ring gear according to claim 1, characterized in that: The coupling portion includes a spline segment suitable for coupling with an external mechanism.

4. The ring gear according to claim 3, characterized in that: The coupling portion is arranged on the axial end surface of the body, and the coupling portion further comprises an annular protrusion extending along the axial direction of the body, and the spline segment is arranged in the radial direction of the annular protrusion.

5. The ring gear according to claim 1 or 2, characterized in that: The coupling portion is disposed on the inner ring and is sequentially disposed with the first coupling tooth in the axial direction.

6. The ring gear according to claim 5, characterized in that: The second coupling tooth and the coupling portion are arranged opposite to each other in a radial direction.

7. The ring gear according to claim 1, characterized in that: It also includes a support position, which is suitable for supporting the bearing, and the support position is arranged on the inner ring and is arranged in sequence with the first combining tooth in the axial direction; and / or the support position is arranged on the outer ring and is arranged in sequence with the second combining tooth in the axial direction.

8. The gear ring according to claim 4 or 6, characterized in that: It also includes a support position, which is arranged on the outer ring and is arranged in sequence with the second combining tooth in the axial direction, and the support position and the first combining tooth are arranged opposite to each other in the radial direction.

9. A reducer, characterized in that: Comprising the ring gear described in any one of claims 1-8.

10. The reducer according to claim 9, characterized in that: Includes planet carrier, sun gear and ring gear; The ring gear and the sun gear selectively rotate synchronously through a coupling mechanism, a first clutch is provided between the sun gear and the housing, the ring gear serves as an input end, and the planet carrier serves as an output end; The first clutch is configured to allow the sun gear to rotate freely in a first direction while restricting the sun gear from rotating in a second direction.

11. The reducer according to claim 10, characterized in that: The first clutch is configured to simultaneously restrict the sun gear from rotating in a first direction and a second direction.

12. The reducer according to claim 10, characterized in that: Also included are a plurality of double-coupled planetary gears; The multiple double-linked planetary gears are arranged on the planet carrier, one of the gears in each of the double-linked planetary gears is drivingly connected to the first combining tooth on the ring gear, and the other gear in each of the double-linked planetary gears is drivingly connected to the sun gear.

13. The reducer according to claim 11, characterized in that: A second clutch is also included, and the coupling portion can be selectively connected to the sun gear or the planet carrier through the second clutch.

14. The reducer according to claim 12, characterized in that: The double planetary gear comprises a planetary gear shaft, a first planetary gear and a second planetary gear, and the planet carrier is connected to the planetary gear shaft between the first planetary gear and the second planetary gear.

15. A drive assembly, characterized in that: Including the reducer described in any one of claims 9-14.

16. A vehicle, characterized in that: Comprising the drive assembly as claimed in claim 15.

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