Reduction gear, electric drive assembly and vehicle

Abstract

The application discloses a reducer, an electric drive assembly and a vehicle, wherein the reducer comprises a shell, a planetary gear mechanism and at least one damping element, the planetary gear mechanism comprises a gear ring, the gear ring is arranged on the shell, and the damping element is arranged on a power transmission path between the shell and the gear ring. The reducer provided by the application can avoid noise transmission between the gear ring and the shell when the planetary gear mechanism is running, and simultaneously reduce vibration between the gear ring and the shell, so that the NVH level of the reducer is effectively improved.

Description

Technical Field

[0001] This application relates to the field of speed reducer technology, and in particular to a speed reducer, an electric drive assembly, and a vehicle. Background Technology

[0002] The application of planetary gear mechanisms in new energy reducers is becoming increasingly widespread, and the NVH (noise, vibration, and harshness) performance of planetary gear mechanisms is their main competitive advantage.

[0003] In a coaxial planetary reducer, the gear ring on the planetary gear mechanism is fixed to the reducer housing by a spline connection. Due to the spline clearance, noise and vibration problems are likely to occur during power transmission after the gear ring and housing are connected. Utility Model Content

[0004] The main objective of this application is to provide a reducer, an electric drive assembly, and a vehicle that can effectively improve noise transmission between the gear ring and the housing and reduce vibration.

[0005] To achieve the above objectives, this application proposes a speed reducer, comprising: case; A planetary gear mechanism, the planetary gear mechanism including a gear ring disposed in the housing; At least one damping element is provided on the power transmission path between the housing and the gear ring.

[0006] In one embodiment, the housing is provided with a keyway or teeth, the toothed ring is provided with teeth or keyways in the circumferential direction, the teeth cooperate with the keyways, and the shock-absorbing element is disposed between the teeth and the keyways.

[0007] In one embodiment, a damping element is provided only on the top surface of the tooth.

[0008] In one embodiment, the damping element is provided circumferentially on the tooth ring or the housing, and the damping element covers the surface of the tooth and the gap between adjacent teeth.

[0009] In one embodiment, the planetary gear has a positioning element connected to the housing, and the damping element is disposed between the positioning element and the housing.

[0010] In one embodiment, the positioning element is a columnar structure that extends at least partially into the housing.

[0011] In one embodiment, the damping element is provided with a wear-resistant layer.

[0012] In one embodiment, the damping element is made of plastic or rubber.

[0013] This application also provides an electric drive assembly, including a reducer as described in any one of the embodiments of this application.

[0014] This application also provides a vehicle including an electric drive assembly as described in the embodiments of this application.

[0015] The reducer provided in this application can avoid noise transmission between the gear ring and the housing during operation by setting damping elements on the power transmission path of the gear ring and the housing. At the same time, it reduces the vibration between the gear ring and the housing, effectively improving the NVH level of the reducer. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a speed reducer provided in one embodiment of this application.

[0018] Explanation of icon numbers:

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0023] The following is a detailed description of this application.

[0024] This application discloses a speed reducer, with reference to... Figure 1 As shown, Figure 1 This is a schematic diagram of the speed reducer provided in this application.

[0025] In the embodiments of this application, such as Figure 1 As shown, the reducer includes a housing 11, a planetary gear mechanism, and at least one damping element 13. The planetary gear mechanism includes a gear ring 12, which is disposed on the housing 11. The damping element 13 is disposed on the power transmission path between the housing 11 and the gear ring 12.

[0026] The shock-absorbing element 13 in this embodiment can be formed of plastic or rubber with a metal frame. The specific form can be determined according to the actual situation, and this embodiment does not limit it.

[0027] In use, by setting a damping element 13 on the power transmission path between the housing 11 and the gear ring 12, the damping element 13 can be used to buffer and absorb shock, thus avoiding the transmission of noise between the gear ring 12 and the housing 11 during the operation of the planetary gear mechanism. At the same time, it reduces the vibration between the gear ring 12 and the housing 11, effectively improving the NVH (N - Noise, V - Vibration, H - Harshness) level of the reducer.

[0028] In some embodiments, the housing 11 is provided with a keyway or teeth, and the gear ring 12 is provided with teeth or keyways in a circumferential manner. The teeth and keyways cooperate with each other, and the damping element 13 is disposed between the teeth and keyways. In this way, the damping element 13 can be easily fixed between the housing 11 and the gear ring 12 through the cooperation of the teeth and keyways.

[0029] In some embodiments, the damping element 13 is provided only on the top surface of the tooth. In this way, the transmission of noise between the gear ring 12 and the housing 11 can be avoided when the planetary gear mechanism is running, as long as the damping element 13 is provided on the top surface of the corresponding tooth.

[0030] In some embodiments, a damping element 13 is provided circumferentially on the tooth ring or housing, and the damping element 13 covers the surface of the tooth and the gap between adjacent teeth.

[0031] In some embodiments, the planetary gear has a positioning element connected to the housing, and the damping element 13 is disposed between the positioning element and the housing. This facilitates fixing the damping element 13 via the positioning element.

[0032] In some embodiments, the positioning element is a columnar structure that extends at least partially into the housing.

[0033] In this embodiment, an end face, i.e. a positioning element, can extend from the side of the gear ring. After the end face mates with the housing, the spline clearance can also be reduced and the noise can be improved through the spacer.

[0034] In some embodiments, the damping element 13 is provided with a wear-resistant layer.

[0035] The wear-resistant layer in this embodiment can be formed from polyethylene, composite wear-resistant materials, etc.

[0036] Because the shock-absorbing element 13 is provided with a wear-resistant layer, it can be prevented from being damaged by friction from the toothed ring 12 or the housing 11 during use.

[0037] In some embodiments, the damping element is made of plastic or rubber.

[0038] This application also provides an electric drive assembly including a reducer as described in any of the embodiments of this application.

[0039] The specific structure of the reducer in this embodiment refers to the above embodiments. Since the electric drive assembly adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0040] This application also provides a vehicle including an electric drive assembly as described in the embodiments of this application.

[0041] The specific structure of the electric drive assembly in this embodiment refers to the above embodiments. Since the vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0042] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A speed reducer, characterized in that, include: Shell (11); A planetary gear mechanism, the planetary gear mechanism including a gear ring (12) disposed on the housing (11). At least one damping element (13) is provided on the power transmission path between the housing (11) and the gear ring (12).

2. The reducer according to claim 1, characterized in that, The housing (11) is provided with a keyway or teeth, and the toothed ring (12) is provided with teeth or keyways around the circumference. The teeth cooperate with the keyways, and the shock-absorbing element (13) is disposed between the teeth and the keyways.

3. The reducer according to claim 2, characterized in that, A damping element (13) is provided only on the top surface of the tooth.

4. The reducer according to claim 2, characterized in that, The damping element (13) is provided circumferentially on the tooth ring or the housing, and the damping element (13) covers the surface of the tooth and the gap between adjacent teeth.

5. The reducer according to claim 1, characterized in that, The planetary gear has a positioning element connected to the housing, and the shock-absorbing element (13) is disposed between the positioning element and the housing.

6. The reducer according to claim 5, characterized in that, The positioning element is a columnar structure that extends at least partially into the housing.

7. The reducer according to any one of claims 2 to 6, characterized in that, The shock-absorbing element (13) is provided with a wear-resistant layer.

8. The reducer according to claim 1, characterized in that, The shock-absorbing element is made of plastic or rubber.

9. An electric drive assembly, characterized in that, Includes the speed reducer as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the electric drive assembly as described in claim 9.

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