Electric driving structure, driving system and vehicle

Abstract

The utility model belongs to the technical field of vehicle driving systems, and particularly relates to an electric driving structure, a driving system and a vehicle, the electric driving structure comprises a driving piece, a first clutch, a second clutch and a planetary mechanism; the planetary mechanism comprises a sun gear, a planet carrier, a first inner gear ring, a planet gear set connected with the planet carrier and a second inner gear ring connected with a piece to be driven. The planet gear set comprises a first planet gear and a second planet gear which are coaxially connected. The first planet gear is meshed with the sun gear and the first inner gear ring; the second planet gear is meshed with the second inner gear ring; the output end of the driving part is connected with the sun gear; the first clutch is used for locking or unlocking the first inner gear ring, and the second clutch is used for locking or unlocking the planet carrier. The electric drive structure has two gears, the first planet gear and the second planet gear are coaxially connected, the first planet gear is meshed with the first inner gear ring, and the second planet gear is meshed with the second inner gear ring, so that the electric drive structure has a larger speed ratio.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle drive systems, and in particular relates to an electric drive structure, a drive system and a vehicle. Background Art

[0002] Distributed electric drive systems in related technologies mainly include parallel shaft structures and coaxial planetary structures. However, distributed electric drive systems with parallel shaft structures have problems such as heavy weight, loose envelope, and low power density. Distributed electric drive systems with coaxial planetary structures are mostly single-gear structures. The speed of the motor at low and high speeds is determined by the wheel speed. During driving, the speed of the motor cannot be adjusted, which will result in the inability to achieve both torque at low speeds and energy efficiency at high speeds. This cannot meet the increasingly high technical requirements of new energy vehicles, and it will also have the problem of relatively low speed. Summary of the invention

[0003] The utility model aims at the technical problems of relatively low speed in the distributed electric drive system in the prior art, and proposes an electric drive structure, a drive system and a vehicle.

[0004] In order to solve the above problems, the first embodiment of the utility model provides an electric drive structure, including a driving member, a first clutch, a second clutch and a planetary mechanism;

[0005] The planetary mechanism comprises a sun gear, a planet carrier, a first inner gear ring, a planetary gear set connected to the planet carrier, and a second inner gear ring connected to the driven member; the planetary gear set comprises a first planetary gear and a second planetary gear coaxially connected; the first planetary gear meshes with the sun gear and the first inner gear ring; the second planetary gear meshes with the second inner gear ring; the output end of the driving member is connected to the sun gear;

[0006] The first clutch is used to lock or unlock the first internal gear ring, and the second clutch is used to lock or unlock the planet carrier.

[0007] Optionally, there are multiple planetary gear sets, each of which includes a rotating shaft, and the first planetary gear and the second planetary gear of the planetary gear set are fixedly mounted on opposite ends of the rotating shaft; the rotating shaft is rotatably connected to the planet carrier.

[0008] Optionally, the planetary gear set is an integrally formed structure.

[0009] Optionally, the first planetary gear and the second planetary gear of the planetary gear set are both welded to the rotating shaft.

[0010] Optionally, the first planetary gear and the second planetary gear of the planetary gear set are both interference connected with the rotating shaft.

[0011] Optionally, the first planetary gear and the second planetary gear of the planetary gear set are both fixedly mounted on the rotating shaft via splines.

[0012] Optionally, the electric drive structure further includes a housing, and the first clutch includes a first clutch outer hub mounted on the housing and a first clutch inner hub adapted to the first clutch outer hub; the first clutch inner hub is mounted on the first inner gear ring.

[0013] Optionally, the second clutch comprises a second clutch outer hub mounted on the housing and a second clutch inner hub matched with the second clutch outer hub; the second clutch inner hub is mounted on the planet carrier.

[0014] Optionally, the driving member is a motor.

[0015] Optionally, the output end of the motor and the sun gear are an integrally formed structure.

[0016] Optionally, an output end of the motor is interference-connected with the sun gear.

[0017] Optionally, the output end of the motor is fixedly connected to the sun gear via a spline.

[0018] Another embodiment of the utility model further provides a driving system, comprising two of the above-mentioned electric driving structures; the two electric driving structures of the driving system are symmetrically arranged.

[0019] Another embodiment of the utility model provides a vehicle, comprising a left wheel, a right wheel and the above-mentioned drive system; the driven parts are the left wheel and the right wheel, and the two electric drive structures of the same drive system are respectively connected to the left wheel and the right wheel.

[0020] In the utility model, the planetary mechanism includes a sun gear, a planet carrier, a first inner gear ring, a plurality of planetary gear sets connected to the planet carrier, and a second inner gear ring connected to the vehicle wheel; each planetary gear set includes a first planetary gear and a second planetary gear connected coaxially; the first planetary gear is meshed with the sun gear and the first inner gear ring; the second planetary gear is meshed with the second inner gear ring; the output end of the driving member is connected to the sun gear; the first clutch is used to lock or unlock the first inner gear ring, and the second clutch is used to lock or unlock the planet carrier. When the first clutch is in a state of locking the first inner gear ring, and the second clutch is in a state of unlocking the planet carrier, the driving member drives the sun gear to rotate, the sun gear drives the first planetary gear to rotate, and the first inner gear ring does not rotate with it, the first planetary gear drives the second planetary gear to rotate, and the second planetary gear drives the wheel to rotate through the second inner gear ring. When the first clutch is in a state of unlocking the first inner gear ring and the second clutch is in a state of locking the planetary carrier, the driving member drives the sun gear to rotate, and the sun gear drives the first planetary gear to rotate. During the rotation of the first planetary gear, the first inner gear ring will be driven to rotate, and the first planetary gear will drive the second planetary gear to rotate, and the second planetary gear will drive the wheel to rotate through the second inner gear ring.

[0021] The electric drive structure has two gears, and the first planetary gear and the second planetary gear are coaxially connected, the first planetary gear is meshed with the first inner gear ring, and the second planetary gear is meshed with the second inner gear ring, so that the electric drive structure has a larger speed ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 A schematic diagram of an electric drive structure provided in one embodiment of the utility model;

[0024] Figure 2 A schematic diagram of a drive system provided in one embodiment of the utility model.

[0025] The reference numerals in the specification are as follows:

[0026] 1. Driving member; 2. First clutch; 3. Second clutch; 4. Planetary mechanism; 41. Sun gear; 42. Planetary gear set; 421. First planetary gear; 422. Second planetary gear; 43. First inner ring gear; 44. Second inner ring gear; 45. Planet carrier; 5. Wheel. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the utility model and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations of the utility model.

[0029] like Figure 1 As shown, the first embodiment of the utility model provides an electric drive structure, including a driving member 1, a first clutch 2, a second clutch 3 and a planetary mechanism 4; it can be understood that the driving member 1 includes but is not limited to a motor and the like.

[0030] The planetary mechanism 4 includes a sun gear 41, a planet carrier 45, a first inner gear ring 43, a planetary gear set 42 connected to the planet carrier 45, and a second inner gear ring 44 connected to the driven member 5 (vehicle wheel, etc.); the planetary gear set 42 includes a first planetary gear 421 and a second planetary gear 422 connected coaxially; the first planetary gear 421 meshes with the sun gear 41 and the first inner gear ring 43; the second planetary gear 422 meshes with the second inner gear ring 44; the output end of the driving member 1 is connected to the sun gear 41; it can be understood that The number of planetary gear sets 42 can be designed according to actual needs. For example, the planetary gear sets 42 are designed with 2 or 3, etc.; in the same planetary gear set 42, the first planetary gear 421 can be coaxially connected with the second planetary gear 422 by means of integration, interference fit, spline, welding, etc.; the sun gear 41 is meshed with multiple first planetary gears 421, and the multiple first planetary gears 421 are also meshed with the internal teeth of the first inner gear ring 43; the multiple second planetary gears 422 are meshed with the internal teeth of the second inner gear ring 44.

[0031] The first clutch 2 is used to lock or unlock the first inner gear ring 43, and the second clutch 3 is used to lock or unlock the planet carrier 45. It can be understood that the first clutch 2 includes a first outer hub fixedly mounted on the housing, and a first inner hub fixedly mounted on the first inner gear ring 43. When the first outer hub is locked with the first inner hub (the first outer hub and the first inner hub are relatively fixed), the first clutch 2 is in a state of locking the first inner gear ring; when the first outer hub and the first inner hub are not locked (the first outer hub and the first inner hub can rotate relative to each other), the first clutch 2 is in a state of unlocking the first inner gear ring 43. Similarly, the second clutch 3 includes a second outer hub fixedly mounted on the housing, and a second inner hub fixedly mounted on the planet carrier 45. When the second outer hub and the second inner hub are locked (the second outer hub and the second inner hub are relatively fixed), the second clutch 3 is in a state of locking the planet carrier 45; when the second outer hub and the second inner hub are not locked (the second outer hub and the second inner hub can rotate relative to each other), the second clutch 3 is in a state of unlocking the planet carrier 45.

[0032] Specifically, when the first clutch 2 is in a state of locking the first inner gear ring 43 and the second clutch 3 is in a state of unlocking the planetary carrier 45, the driving member 1 drives the sun gear 41 to rotate, the sun gear 41 drives the first planetary gear 421 to rotate, and the first inner gear ring 43 does not rotate accordingly, the first planetary gear 421 drives the second planetary gear 422 to rotate, and the second planetary gear 422 drives the wheel 5 to rotate through the second inner gear ring 44.

[0033] When the first clutch 2 is in a state of unlocking the first inner gear ring 43 and the second clutch 3 is in a state of locking the planetary carrier 45, the driving member 1 drives the sun gear 41 to rotate, and the sun gear 41 drives the first planetary gear 421 to rotate. During the rotation of the first planetary gear 421, the first inner gear ring 43 will be driven to rotate, and the first planetary gear 421 will drive the second planetary gear 422 to rotate, and the second planetary gear 422 will drive the wheel 5 to rotate through the second inner gear ring 44.

[0034] The electric drive structure has two gears, and the first planetary gear 421 and the second planetary gear 422 are coaxially connected, the first planetary gear 421 is meshed with the first inner gear ring 43, and the second planetary gear 422 is meshed with the second inner gear ring 44, so that the electric drive structure has a larger speed ratio.

[0035] When the first clutch 2 is in a state of unlocking the first inner ring gear 43, and the second clutch 3 is in a state of unlocking the planetary carrier 45, the rotation of the wheel 5 will drive the second inner ring gear 44 to rotate, the rotation of the second inner ring gear 44 will drive the second planetary gear 422 to rotate, the second planetary gear 422 drives the first planetary gear 421 to rotate, the first planetary gear 421 drives the first inner ring gear 43 to rotate without driving the sun gear 41 to rotate, so that the rotation of the wheel 5 will not drive the driving member 1 to rotate; when the electric drive structure is used as an auxiliary drive, the wheel end can be disconnected, the drag loss can be reduced, and the transmission efficiency of the driving member 1 can be improved.

[0036] In one embodiment, if Figure 1 As shown, there are multiple planetary gear sets 42, each of which includes a rotating shaft, and a first planetary gear 421 and a second planetary gear 422 of the planetary gear set 42 are fixedly mounted at opposite ends of the rotating shaft; the rotating shaft is rotatably connected to the planet carrier 45. It can be understood that in the same planetary gear set 42, the first planetary gear 421 and the second planetary gear 422 share a transmission shaft, which improves the compactness of the electric drive structure and reduces its manufacturing cost.

[0037] In one embodiment, the planetary gear set 42 is an integrally formed structure. It can be understood that the integrally formed first planetary gear 421 and the second planetary gear 422 are double gears, thereby improving the compactness of the electric drive structure and reducing the occupied space of the electric drive structure.

[0038] In one embodiment, the first planetary gear 421 and the second planetary gear 422 of the planetary gear set 42 are both welded to the rotating shaft; the first planetary gear 421 and the second planetary gear 422 are tightly welded to the transmission shaft, ensuring the stability of the first planetary gear 421 and the second planetary gear 422 installed on the transmission shaft.

[0039] In another embodiment, the first planetary gear 421 and the second planetary gear 422 of the planetary gear set 42 are both interference connected with the rotating shaft; it can be understood that the cooperation between the first planetary gear 421, the second planetary gear 422 and the transmission shaft is simple and the manufacturing cost is low.

[0040] In another embodiment, the first planetary gear 421 and the second planetary gear 422 of the planetary gear set 42 are both fixedly mounted on the rotating shaft via splines. It can be understood that the first planetary gear 421 and the second planetary gear 422 are both connected to the transmission shaft via splines, so that the disassembly and assembly operations between the first planetary gear 421 and the second planetary gear 422 and the transmission shaft are simple.

[0041] In one embodiment, if Figure 1As shown, the electric drive structure also includes a housing, and the first clutch 2 includes a first clutch outer hub mounted on the housing and a first clutch inner hub adapted to the first clutch outer hub; the first clutch inner hub is mounted on the first inner gear ring 43. It can be understood that the first clutch outer hub can be mounted on the housing of the vehicle body; when the first clutch outer hub is combined with the first clutch inner hub, the first clutch 2 is in a state of locking the first inner gear ring 43; when the first clutch outer hub is separated from the first clutch inner hub, the first clutch 2 is in a state of unlocking the first inner gear ring 43. In the utility model, the first clutch outer hub is mounted on the vehicle body, and the first clutch inner hub is mounted on the first inner gear ring 43, which further improves the compactness of the electric drive structure.

[0042] In one embodiment, if Figure 1 As shown, the second clutch 3 includes a second clutch outer hub mounted on the housing and a second clutch inner hub adapted to the second clutch outer hub; the second clutch inner hub is mounted on the planet carrier 45. It can be understood that the second clutch outer hub can be mounted on the housing of the vehicle body; when the second clutch outer hub is combined with the second clutch inner hub, the second clutch 3 is in a state of locking the planet carrier 45; when the second clutch outer hub is separated from the second clutch inner hub, the second clutch 3 is in a state of unlocking the planet carrier 45. In the utility model, the second clutch outer hub is mounted on the vehicle body, and the second clutch inner hub is mounted on the planet carrier 45, which further improves the compactness of the electric drive structure.

[0043] In one embodiment, the driving member 1 is a motor, and the output end of the motor and the sun gear 41 are an integrally formed structure; in this case, the output end of the motor and the sun gear 41 are tightly connected.

[0044] In another embodiment, the driving member 1 is a motor, and an output end of the motor is interference-connected with the sun gear 41 . This time, the connection structure between the motor and the sun gear 41 is simple, which reduces the manufacturing cost of the electric drive structure.

[0045] In another embodiment, the driving member 1 is a motor, and the output end of the motor is fixedly connected to the sun gear 41 via a spline; in this case, the motor and the sun gear 41 are detachably connected, which facilitates the disassembly and assembly between the motor and the sun gear 41.

[0046] like Figure 2 As shown, another embodiment of the utility model further provides a drive system, including two electric drive structures as described above; the two electric drive structures of the drive system are symmetrically arranged. It can be understood that the two electric drive structures are respectively connected to the left wheel 5 and the right wheel 5 of the vehicle to drive the left wheel 5 and the right wheel 5 respectively, forming a distributed electric drive; one electric drive structure pair has two gears, and the drive system has two electric drive structures, so that the drive system has four gears.

[0047] Another embodiment of the utility model provides a vehicle, comprising a left wheel, a right wheel and at least one of the above-mentioned drive systems; the driven member 5 is the left wheel and the right wheel, and two electric drive structures of the same drive system are respectively connected to the left wheel and the right wheel.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric drive structure, characterized in that: It includes a driving member, a first clutch, a second clutch and a planetary mechanism; The planetary mechanism comprises a sun gear, a planet carrier, a first inner gear ring, a planetary gear set connected to the planet carrier, and a second inner gear ring connected to a driven member; the planetary gear set comprises a first planetary gear and a second planetary gear connected coaxially; the first planetary gear meshes with the sun gear and the first inner gear ring; the second planetary gear meshes with the second inner gear ring; the output end of the driving member is connected to the sun gear; The first clutch is used to lock or unlock the first internal gear ring, and the second clutch is used to lock or unlock the planet carrier.

2. The electric drive structure according to claim 1, characterized in that: There are multiple planetary gear sets, each of which includes a rotating shaft. The first planetary gear and the second planetary gear of the planetary gear set are fixedly mounted at opposite ends of the rotating shaft; the rotating shaft is rotatably connected to the planet carrier.

3. The electric drive structure according to claim 2, characterized in that: The planetary gear set is an integrally formed structure.

4. The electric drive structure according to claim 2, characterized in that: The first planetary gear and the second planetary gear of the planetary gear set are both welded to the rotating shaft; or The first planetary gear and the second planetary gear of the planetary gear set are both interference connected with the rotating shaft; or The first planetary gear and the second planetary gear of the planetary gear set are both fixedly mounted on the rotating shaft via splines.

5. The electric drive structure according to claim 1, characterized in that: The electric drive structure also includes a housing, and the first clutch includes a first clutch outer hub mounted on the housing and a first clutch inner hub adapted to the first clutch outer hub; the first clutch inner hub is mounted on the first inner gear ring.

6. The electric drive structure according to claim 5, characterized in that: The second clutch comprises a second clutch outer hub mounted on the housing and a second clutch inner hub matched with the second clutch outer hub; the second clutch inner hub is mounted on the planet carrier.

7. The electric drive structure according to claim 1, characterized in that: The driving member is a motor.

8. The electric drive structure according to claim 7, characterized in that: The output end of the motor and the sun gear are integrally formed; or An interference fit connection exists between the output end of the motor and the sun gear; or The output end of the motor is fixedly connected to the sun gear via a spline.

9. A drive system, characterized in that: The drive system comprises two electric drive structures according to any one of claims 1 to 8; the two electric drive structures of the drive system are symmetrically arranged.

10. A vehicle, characterized in that: It comprises a left wheel, a right wheel and at least one driving system as claimed in claim 9; the driven parts are the left wheel and the right wheel, and the two electric drive structures of the same driving system are respectively connected to the left wheel and the right wheel.

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