Compact dual-motor driving structure and automobile

Abstract

The utility model provides a compact type dual-motor driving structure and an automobile, and belongs to the technical field of motors, the compact type dual-motor driving structure comprises two driving assemblies used for driving left and right wheels to rotate respectively, each driving assembly comprises a driving motor and a planet row, the driving motor is used for driving the planet row so as to drive wheels to rotate; wherein a mounting groove is formed in a rotor of the driving motor, and at least part of the planet row is mounted in the mounting groove. According to the technical scheme, at least part of the planet row is installed in the installation groove, so that the space size of the driving assembly in the axis direction of the rotating shaft of the driving motor is reduced, the axial arrangement space of the electric drive is greatly shortened, and the enveloping size of the electric drive is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and relates to a compact dual-motor drive structure and an automobile. Background Art

[0002] With the great development trend of new energy vehicles, endurance is the biggest pain point and anxiety of current new energy vehicle models. Under the background of existing battery technology, the existing electric drive has a high space occupancy rate, and is only driven by one motor, with a small driving torque and large power loss. Content of the Utility Model

[0003] In view of this, the utility model provides a compact dual-motor drive structure and an automobile, aiming to reduce the space occupancy rate of the motor drive structure.

[0004] To achieve the above object, the utility model provides a compact dual-motor drive structure, including:

[0005] Two drive components for respectively driving the left and right wheels to rotate. The drive component includes a drive motor and a planetary gear set. The drive motor is used to drive the planetary gear set to drive the wheel to rotate;

[0006] Wherein, an installation groove is formed on the rotor of the drive motor, and at least part of the planetary gear set is installed in the installation groove.

[0007] In one embodiment, the planetary gear set includes:

[0008] A sun gear provided with external teeth, and the motor is drivingly connected to the sun gear;

[0009] A plurality of planetary gears provided with external teeth, and the plurality of planetary gears are respectively meshed with the external teeth of the sun gear;

[0010] An internal gear ring, the inner ring of which is provided with internal teeth, and the internal teeth of the internal gear ring are meshed with the plurality of planetary gears to drive the wheel to rotate through a transmission structure.

[0011] In one embodiment, the transmission structure includes a planet carrier. The planet carrier includes a main shaft and a plurality of secondary shafts. The plurality of secondary shafts are respectively arranged on the plurality of planetary gears, and the axes of the plurality of secondary shafts respectively coincide with the axes of the plurality of planetary gears;

[0012] The plurality of secondary shafts are fixedly connected to the main shaft. The main shaft is used to be connected to the wheel to drive the wheel to rotate, and the axis of the main shaft coincides with the axis of the sun gear.

[0013] In one embodiment, the diameter of the sun gear is smaller than the diameter of the planetary gear.

[0014] In one embodiment, the internal gear ring is used to be fixed on the transmission of an automobile.

[0015] In one embodiment, the sun gear and a plurality of the planet gears are arranged in the mounting groove, and at least part of the internal gear ring is arranged in the mounting groove.

[0016] In one embodiment, the planet gear is provided with a first tooth portion and a second tooth portion. The first tooth portion and the second tooth portion are coaxially and fixedly connected. The first tooth portion meshes with the external teeth of the sun gear, and the second tooth portion meshes with the internal teeth of the internal gear ring.

[0017] In one embodiment, the number of teeth of the sun gear is less than the number of teeth of the first tooth portion.

[0018] In one embodiment, the number of teeth of the second tooth portion is less than the number of teeth of the first tooth portion.

[0019] The present utility model also provides an automobile, including the compact dual-motor drive structure as described above.

[0020] By arranging at least part of the planetary gear set in the mounting groove, the technical solution of the present utility model reduces the space size of the drive assembly in the axial direction of the axis where the drive motor shaft is located, greatly shortens the axial layout space of the electric drive, and reduces the envelope volume of the electric drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the compact dual-motor drive structure provided by the present utility model.

[0023] Explanation of the reference numerals in the drawings:

[0024] 1000, compact dual-motor drive structure; 1, drive motor; 11, rotor; 2, planetary gear set; 21, sun gear; 22, planet gear; 221, first tooth portion; 222, second tooth portion; 23, internal gear ring; 24, transmission structure; 241, planet carrier; 241a, main shaft; 241b, secondary shaft; 3, wheel; 4, transmission.

[0025] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0027] It should be noted that for those conditions not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. For reagents or instruments without indicating the manufacturer, they are all conventional products that can be obtained through commercial purchase. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] With the great development trend of new energy vehicles, endurance is the biggest pain point and anxiety for current new energy vehicle models. In the context of existing battery technologies, the existing electric drive has a high space occupancy rate, is driven by only one motor, has a small driving torque, and a large power loss.

[0029] In view of this, the present utility model provides a compact dual-motor drive structure 1000, including two drive components. The two drive components are used to drive the left and right wheels 3 to rotate respectively. The drive component includes a drive motor 1 and a planetary gear set 2. The drive motor 1 is used to drive the planetary gear set 2 to drive the wheel 3 to rotate. Among them, an installation groove is formed on the rotor 11 of the drive motor 1, and at least part of the planetary gear set 2 is installed in the installation groove.

[0030] The technical solution of the present utility model reduces the space size of the drive component in the axial direction of the axis where the drive motor 1 rotates by installing at least part of the planetary gear set 2 in the installation groove, greatly shortening the axial layout space of the electric drive and reducing the envelope volume of the electric drive.

[0031] In one embodiment, the planetary gear set 2 includes: a sun gear 21 provided with external teeth, and the motor is drivingly connected to the sun gear 21; a plurality of planet gears 22 provided with external teeth, and the plurality of planet gears 22 are respectively meshed with the external teeth of the sun gear 21; a ring gear 23, the inner ring of which is provided with internal teeth, and the internal teeth of the ring gear 23 are meshed with the plurality of planet gears 22 to drive the wheel 3 to rotate through a transmission structure 24.

[0032] The technical solution of the present utility model forms a flexible power split mechanism by adopting the meshing design of the plurality of planet gears 22 with the sun gear 21 and the ring gear 23. This mechanism can automatically adjust the torque distribution to the wheel 3 according to different driving conditions or working loads, enhancing the traction performance of the vehicle; by adopting the planetary gear set 2, due to its unique spatial layout, a large transmission ratio can be achieved in a smaller space, thereby optimizing the overall layout and providing more design space for other system components.

[0033] In one embodiment of the present utility model, the rotor 11 of the motor is fixedly connected to the sun gear 21, reducing the multi-stage transmission loss in the traditional transmission system and improving the energy conversion efficiency.

[0034] In one embodiment, the transmission structure 24 includes a carrier 241. The carrier 241 includes a main shaft 241a and a plurality of secondary shafts 241b. The plurality of secondary shafts 241b are respectively disposed on the plurality of planet gears 22, and the axes of the plurality of secondary shafts 241b respectively coincide with the axes of the plurality of planet gears 22; the plurality of secondary shafts 241b are fixedly connected to the main shaft 241a, and the main shaft 241a is used to connect to the wheel 3 to drive the wheel 3 to rotate, and the axis of the main shaft 241a coincides with the axis of the sun gear 21.

[0035] The technical solution of the present utility model ensures the directness and accuracy of power transmission by adopting the fixed connection of the secondary shaft 241b and the main shaft 241a, so that the plurality of planet gears 22 jointly share the driving force from the drive motor 1 and various loads during the operation process, realizing the balanced distribution of the loads, reducing the wear of a single component, and improving the stability and durability of the overall system.

[0036] In one embodiment, the diameter of the sun gear 21 is smaller than the diameter of the planet gear 22.

[0037] The technical solution of the present utility model combines a relatively large planet gear 22 with a relatively small sun gear 21, enabling a relatively large transmission ratio, so that at the same motor speed, a higher wheel 3 speed or a greater torque output can be obtained, which helps to improve the acceleration performance or climbing ability of the vehicle, and is also suitable for application scenarios that require a wide transmission range; in addition, although the diameter of the sun gear 21 is small, due to the special layout of the planetary gear mechanism, efficient power transmission can still be ensured, and it is more flexible in terms of space occupation.

[0038] In one embodiment, the internal gear ring 23 is used to be fixed on the vehicle transmission 4.

[0039] The technical solution of the present utility model directly fixes the internal gear ring 23 on the transmission 4, ensuring seamless docking between the motor-driven planetary gear set 2 system and the vehicle's traditional transmission system. This direct integration not only reduces energy loss during power transmission but also improves the overall transmission efficiency.

[0040] In one embodiment, the sun gear 21 and multiple planet gears 22 are arranged in the installation groove, and at least a part of the internal gear ring 23 is arranged in the installation groove.

[0041] The technical solution of the present utility model integrates the sun gear 21, planet gears 22 and a part of the structure of the internal gear ring 23 in the installation groove, effectively utilizing the space and making the entire transmission device more compact. This design is particularly suitable for vehicles or mechanical equipment with limited space, helping to reduce weight and optimize the overall layout.

[0042] In one embodiment, the planet gear 22 is provided with a first tooth part 221 and a second tooth part 222, the first tooth part 221 and the second tooth part 222 are coaxially fixed, the first tooth part 221 meshes with the external teeth of the sun gear 21, and the second tooth part 222 meshes with the internal teeth of the internal gear ring 23.

[0043] In the technical solution of the present utility model, the first tooth part 221 meshes with the sun gear 21 and directly receives the motor driving force; the second tooth part 222 meshes with the internal gear ring 23, and then the torque and speed output to the wheel 3 or the working component can be adjusted according to driving or operating requirements. This design enables the entire transmission system to effectively adapt to various working conditions, being able to provide sufficient torque at low speeds and maintain good power output at high speeds.

[0044] In one embodiment, the number of teeth of the sun gear 21 is less than the number of teeth of the first tooth part 221.

[0045] In the technical solution of the present utility model, since the number of teeth of the sun gear 21 is less than the number of teeth of the first tooth portion 221 of the planet gear 22, this design can produce a relatively large reduction ratio. This means that at the same rotational speed of the motor, the rotational speed of the wheel 3 can be significantly reduced through this planetary gear mechanism, increasing the torque output.

[0046] In one embodiment, the number of teeth of the second tooth portion 222 is less than the number of teeth of the first tooth portion 221.

[0047] In the technical solution of the present utility model, by adjusting the number of teeth of the second tooth portion 222 to be less than the number of teeth of the first tooth portion 221, so that the second tooth portion 222 is smaller than the first tooth portion 221, thereby reducing the size of the compact dual-motor drive structure 1000 in the radial direction along the rotation axis of the drive motor 1, thus optimizing the overall layout.

[0048] The present utility model also provides an automobile, including the compact dual-motor drive structure 1000 as described above.

[0049] Since this automobile adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one here.

[0050] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the patent protection scope of the present utility model.

Claims

1. A compact dual-motor drive structure, characterized in that: include: Two drive assemblies, used to drive the left and right wheels to rotate respectively, the drive assemblies include a drive motor and a planetary gear, the drive motor is used to drive the planetary gear to drive the wheels to rotate; Wherein, a mounting groove is provided on the rotor of the driving motor, and the planetary gear is at least partially mounted in the mounting groove.

2. The compact dual-motor drive structure according to claim 1, characterized in that: The planetary gear comprises: A sun gear is provided with external teeth, and the driving motor is drivingly connected to the sun gear; a plurality of planetary gears, each of which is provided with external teeth, and each of the plurality of planetary gears is respectively meshed with the external teeth of the sun gear; and The inner ring of the inner gear is provided with internal teeth, and the internal teeth of the inner ring are meshed with the plurality of planetary gears to drive the wheels to rotate through the transmission structure.

3. The compact dual-motor drive structure according to claim 2, characterized in that: The transmission structure comprises a planet carrier, the planet carrier comprises a main shaft and a plurality of secondary shafts, the plurality of secondary shafts are respectively arranged on the plurality of planetary wheels, and the axes of the plurality of secondary shafts respectively coincide with the axes of the plurality of planetary wheels; A plurality of secondary shafts are fixedly connected to the main shaft, and the main shaft is used to be connected to the wheel to drive the wheel to rotate, and the axis of the main shaft coincides with the axis of the sun gear.

4. The compact dual-motor drive structure according to claim 2, characterized in that: The diameter of the sun gear is smaller than the diameter of the planet gears.

5. The compact dual-motor drive structure according to claim 2, characterized in that: The inner gear ring is used for fixing on the gearbox of the automobile.

6. The compact dual-motor drive structure according to claim 5, characterized in that: The sun gear and the plurality of planetary gears are arranged in the installation groove, and at least a portion of the inner gear ring is arranged in the installation groove.

7. The compact dual-motor drive structure according to claim 2, characterized in that: The planetary gear is provided with a first tooth portion and a second tooth portion, the first tooth portion and the second tooth portion are coaxially fixedly connected, the first tooth portion meshes with the outer teeth of the sun gear, and the second tooth portion meshes with the inner teeth of the inner gear ring.

8. The compact dual-motor drive structure according to claim 7, characterized in that: The number of teeth of the sun gear is smaller than the number of teeth of the first gear portion.

9. The compact dual-motor drive structure according to claim 7, characterized in that: The number of teeth of the second tooth portion is less than the number of teeth of the first tooth portion.

10. An automobile comprising the compact dual-motor drive structure according to any one of claims 1 to 9.

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