Gear ring vibration isolation structure, planetary mechanism and vehicle

Abstract

The utility model belongs to the technical field of planetary mechanisms, and particularly relates to a gear ring vibration isolation structure, a planetary mechanism and a vehicle. The gear ring vibration isolation structure comprises a shell with an inner space, and a first annular elastic piece, a second annular elastic piece, an inner gear ring and a radial elastic piece which are all mounted in the inner space; the multiple radial elastic pieces are arranged between the outer ring face of the inner gear ring and the inner wall of the inner space at intervals. The first annular elastic piece, the second annular elastic piece and the inner gear ring are coaxially arranged, and the first annular elastic piece and the second annular elastic piece are arranged at the two opposite ends of the inner gear ring. According to the planetary mechanism, most of frequency vibration can be filtered out through the first annular elastic piece, the second annular elastic piece and the radial elastic piece when the planetary gear is excited by the inner gear ring, so that vibration transmitted to the shell by the inner gear ring is greatly reduced, the vibration effect of the shell is reduced, and the noise level of the planetary mechanism is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of planetary mechanisms, and in particular relates to a gear ring vibration isolation structure, a planetary mechanism and a vehicle. Background Art

[0002] A planetary mechanism usually includes a sun gear, planetary gears, a planetary carrier and an inner ring gear. The planetary gears are mounted on the planetary carrier and mesh with the sun gear, while the inner ring gear is usually mounted on the housing through splines, bolts, etc. and meshes with the planetary gears. The inventors have found that during the operation of the planetary mechanism, the meshing noise of the sun gear and the planetary gears is easily transmitted directly to the housing through the inner ring gear and radiated outward through the housing, thereby reducing the NVH (Noise, Vibration, Harshness) performance of the entire vehicle. Utility Model Content

[0003] The utility model aims at the technical problems in the prior art such as the relatively large noise of the planetary mechanism, and proposes a ring gear vibration isolation structure, a planetary mechanism and a vehicle.

[0004] In order to solve the above problems, an embodiment of the utility model provides a gear ring vibration isolation structure, comprising a housing provided with an internal space, and a first annular elastic member, a second annular elastic member, an inner gear ring and a radial elastic member all installed in the internal space; a plurality of the radial elastic members are arranged at intervals between the outer ring surface of the inner gear ring and the inner wall of the internal space;

[0005] The first annular elastic member, the second annular elastic member and the inner gear ring are coaxially arranged, and the first annular elastic member and the second annular elastic member are arranged at opposite ends of the inner gear ring.

[0006] Optionally, first grooves are arranged at intervals on the outer ring surface of the inner gear ring, and second grooves are arranged on the inner wall of the internal space at positions opposite to the first grooves; an installation space is enclosed between the first groove and the second groove; and the radial elastic member is installed in the installation space.

[0007] Optionally, the gear ring vibration isolation structure includes a plurality of radial elastic parts, a plurality of first grooves distributed in annular intervals are provided on the outer ring surface of the inner gear ring, and a plurality of second grooves distributed in annular intervals are provided on the inner wall of the internal space; the installation space is enclosed by the first grooves and the second grooves relative to each other, and the radial elastic parts are installed one by one in the installation space.

[0008] Optionally, the radial elastic member comprises an elastic pin, and an axis of the elastic pin is parallel to an axis of the inner gear ring.

[0009] Optionally, an annular groove is provided on the bottom wall of the internal space; the second annular elastic member is installed in the annular groove and abuts against the inner gear ring.

[0010] Optionally, the second annular elastic member comprises a wave washer.

[0011] Optionally, the first annular elastic member includes an annular retaining spring, and the annular retaining spring abuts against the inner gear ring and the radial elastic member.

[0012] Optionally, the internal space includes a first cylindrical space, a second cylindrical space and a third cylindrical space that are connected in sequence; the inner diameter of the first cylindrical space is smaller than the inner diameter of the second cylindrical space, and larger than the inner diameter of the third cylindrical space;

[0013] The inner gear ring is installed in the second cylindrical space, and the radial elastic member is arranged between the outer ring surface of the inner gear ring and the inner wall of the second cylindrical space. An embodiment of the utility model also provides a planetary mechanism, including a sun gear, a planetary gear, a planetary carrier and the above-mentioned gear ring vibration isolation structure; the planetary gear is installed on the planetary carrier and meshes with the sun gear, and the inner gear ring is meshed with the planetary gear.

[0014] An embodiment of the utility model further provides a vehicle, comprising the above-mentioned planetary mechanism.

[0015] In the utility model, the radial elastic member and the inner gear ring are both installed in the internal space of the shell, and the radial elastic member is arranged at intervals between the outer ring surface of the inner gear ring and the inner wall of the internal space; there may be an assembly gap between the radial elastic member and the radial outer wall of the inner gear ring and the inner wall of the internal space, and the radial elastic member itself has a certain elastic deformation, so that the radial elastic member can offset the radial floating between the inner gear ring and the shell, and can solve the uneven load problem caused by the manufacturing and assembly errors of the inner gear ring and the shell, which is beneficial to reduce the impact and noise generated by the meshing of the inner gear ring and the planetary gear, and improve the stability and smoothness of the operation of the planetary mechanism.

[0016] In addition, the first annular elastic member and the second annular elastic member are both installed in the internal space, the first annular elastic member, the second annular elastic member and the inner gear ring are coaxially arranged, and the first annular elastic member and the second annular elastic member are arranged at opposite ends of the inner gear ring; the first annular elastic member, the second annular elastic member and the radial elastic member prevent the inner gear ring from directly contacting the shell, thereby blocking the transmission path of vibration noise between the inner gear ring and the shell; the planetary gear excitation force exerted on the inner gear ring can filter out most of the frequency vibration through the first annular elastic member, the second annular elastic member and the radial elastic member, so that the vibration transmitted to the shell by the inner gear ring is greatly reduced, thereby reducing the vibration effect of the shell and improving the noise level of the planetary mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 A schematic structural diagram of a gear ring vibration isolation structure provided in one embodiment of the utility model;

[0019] Figure 2 A cross-sectional view of a gear ring vibration isolation structure provided by an embodiment of the utility model;

[0020] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 A front view of an inner gear ring of a gear ring vibration isolation structure provided by an embodiment of the utility model;

[0022] Figure 5 A front view of a housing of a gear ring vibration isolation structure provided in one embodiment of the utility model.

[0023] The reference numerals in the specification are as follows:

[0024] 1. Shell; 11. Internal space; 111. First cylindrical space; 112. Second cylindrical space; 113. Third cylindrical space; 12. Second groove; 13. Annular groove; 2. First annular elastic member; 3. Second annular elastic member; 4. Inner gear ring; 41. First groove; 5. Radial elastic member. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] like Figures 1 to 3As shown, a gear ring vibration isolation structure provided by the first embodiment of the utility model comprises a shell 1 provided with an internal space 11, and a first annular elastic member 2, a second annular elastic member 3, an inner gear ring 4 and a radial elastic member 5 all installed in the internal space 11; the radial elastic member 5 is arranged at intervals between the outer ring surface of the inner gear ring 4 and the inner wall of the internal space 11; it can be understood that the radial elastic member 5 can be made of a material with certain elasticity and wear resistance such as plastic, or can be made of steel in the shape of a spiral spring; the radial elastic member 5 abuts against the radial outer wall of the inner gear ring 4 and the inner wall of the internal space 11; the radial elastic member 5 can transmit the radial force and tangential force of the inner gear ring 4.

[0028] The first annular elastic member 2, the second annular elastic member 3 and the inner gear ring 4 are coaxially arranged, and the first annular elastic member 2 and the second annular elastic member 3 are arranged at opposite ends of the inner gear ring 4. It can be understood that the first annular elastic member 2 and the second annular elastic member 3 both include but are not limited to a retaining spring, an elastic washer, etc., the first annular elastic member 2 is pressed between the first end face and the first inner side wall, the second annular elastic member 3 is pressed between the second end face and the second inner side wall, the first end face and the second end face are respectively opposite to the two axial ends of the inner gear ring 4 (that is, the first end face and the second end face are respectively located on opposite sides of the outer ring face), and the first inner side wall and the second inner side wall are respectively located on opposite side walls of the internal space 11 (that is, the first inner side wall and the second inner side wall are respectively located on opposite sides of the inner wall); the first annular elastic member 2 and the second annular elastic member 3 can transmit the axial force of the inner gear ring 4.

[0029] In the utility model, the radial elastic member 5 and the inner gear ring 4 are both installed in the internal space 11 of the housing 1, and the radial elastic member 5 is arranged at intervals between the outer ring surface of the inner gear ring 4 and the inner wall of the internal space 11; there may be an assembly gap between the radial elastic member 5 and the radial outer wall of the inner gear ring 4 and the inner wall of the internal space 11, and the radial elastic member 5 itself has a certain elastic deformation, so that the radial elastic member 5 can offset the radial floating between the inner gear ring 4 and the housing 1, and can solve the uneven load problem caused by the manufacturing and assembly errors of the inner gear ring 4 and the housing 1, which is beneficial to reduce the impact and noise generated by the meshing of the inner gear ring 4 with the planetary gear, and improve the stability and smoothness of the operation of the planetary mechanism.

[0030] In addition, the first annular elastic member 2 and the second annular elastic member 3 are both installed in the internal space 11, the first annular elastic member 2, the second annular elastic member 3 and the inner gear ring 4 are coaxially arranged, and the first annular elastic member 2 and the second annular elastic member 3 are arranged at opposite ends of the inner gear ring 4; the first annular elastic member 2, the second annular elastic member 3 and the radial elastic member 5 prevent the inner gear ring 4 from directly contacting the shell 1, thereby blocking the propagation path of vibration noise between the inner gear ring 4 and the shell 1; the planetary gear excitation force exerted on the inner gear ring 4 can filter out most of the frequency vibration through the first annular elastic member 2, the second annular elastic member 3 and the radial elastic member 5, so that the vibration transmitted from the inner gear ring 4 to the shell 1 is greatly reduced, thereby reducing the vibration effect of the shell 1 and improving the noise level of the planetary mechanism.

[0031] In one embodiment, if Figures 2 to 5 As shown, first grooves 41 are arranged at intervals on the outer ring surface of the inner gear ring 4, and second grooves 12 are arranged on the inner wall of the internal space 11 at positions opposite to the first grooves 41; an installation space is formed between the first grooves 41 and the second grooves 12; and the radial elastic member 5 is installed in the installation space. It can be understood that a part of the radial elastic member 5 is located in the first groove 41, and another part of the radial elastic member 5 is located in the second groove 12, which improves the stability of the radial elastic member 5 installed between the outer ring surface of the inner gear ring 4 and the inner wall of the internal space 11. Preferably, the first groove 41 and the second groove 12 are both semicircular grooves, and the installation space is a circular space.

[0032] In one embodiment, if Figures 2 to 5 As shown, the gear ring vibration isolation structure includes a plurality of radial elastic members 5, a plurality of first grooves 41 distributed in an annular space are provided on the outer ring surface of the inner gear ring 4, and a plurality of second grooves 12 distributed in an annular space are provided on the inner wall of the internal space 11; an installation space is formed between the first grooves 41 and the second grooves 12 relative to each other, and the radial elastic members 5 are installed in the installation space one by one. It can be understood that the radial elastic members 5 include but are not limited to elastic pins, etc., and the number of the first grooves 41 and the second grooves 12 can be set according to actual needs, for example, the first grooves 41 and the second grooves 12 are both provided with 18, 20, 22, etc. In this embodiment, a plurality of radial elastic members 5 are provided between the radial outer wall of the inner gear ring 4 and the inner wall of the internal space 11, which further ensures the stability of the transmission of radial force and tangential force between the inner gear ring 4 and the housing 1.

[0033] In one embodiment, if Figure 1As shown, the radial elastic member 5 includes an elastic pin, and the axis of the elastic pin is parallel to the axis of the inner gear ring 4. It can be understood that the radial elastic member 5 is a cylinder; further, a plurality of radial elastic members 5 are provided, and the radial elastic members 5 are installed in the first groove 41 and the second groove 12 in a one-to-one correspondence. In this embodiment, the gear ring vibration isolation structure has a simple structure, low manufacturing cost, and is easy to mass produce.

[0034] In one embodiment, if Figure 2 and Figure 3 As shown, an annular groove 13 is provided on the bottom wall of the internal space 11; the second annular elastic member 3 is installed in the annular groove 13 and abuts against the inner gear ring 4. It can be understood that the annular groove 13 is connected to the internal space 11, a part of the second annular elastic member 3 is installed in the annular groove 13, and another part of the second annular elastic member 3 extends into the internal space 11 and abuts against the second end face of the inner gear ring 4. In this embodiment, the second annular elastic member 3 is installed in the annular groove 13, which ensures the stability of the second annular elastic member 3 installed in the internal space 11.

[0035] In one embodiment, if Figure 1 As shown, the second annular elastic member 3 includes a wave washer. It can be understood that the wave washer is installed in the annular groove 13 and abuts against the second end surface of the inner gear ring 4. The wave washer has a large elastic force, which ensures the stability of the axial assembly of the inner gear ring 4 and the housing 1.

[0036] In one embodiment, if Figure 1 As shown, the first annular elastic member 2 includes an annular circlip, which abuts against the inner gear ring 4 and the radial elastic member 5. It can be understood that one end of the annular circlip abuts against the first end face of the inner gear ring 4 and the radial elastic member 5; the annular circlip can provide an axial force for the inner gear ring 4 and the radial elastic member 5, so that the second annular elastic member 3 is pressed between the second end face of the inner gear ring 4 and the second inner side wall of the internal space 11, and the radial elastic member 5 is stably installed in the internal space 11.

[0037] In one embodiment, the housing 1 is further provided with an annular groove communicating with the internal space 11 , and the annular retaining spring is installed in the annular groove and abuts against the inner gear ring 4 and the radial elastic member 5 .

[0038] In one embodiment, if Figure 2 and Figure 3 As shown, the internal space 11 includes a first cylindrical space 111, a second cylindrical space 112 and a third cylindrical space 113 which are connected in sequence; the inner diameter of the first cylindrical space 111 is smaller than the inner diameter of the second cylindrical space 112, and larger than the inner diameter of the third cylindrical space 113; it can be understood that the first cylindrical space 111 and the third cylindrical space 113 are respectively connected at the left and right ends of the second cylindrical space 112.

[0039] The inner gear ring 4 is installed in the second cylindrical space 112 , and the radial elastic member 5 is arranged between the outer ring surface of the inner gear ring 4 and the inner wall of the second cylindrical space 112 . In this embodiment, the inner diameter of the first cylindrical space 111 is smaller than the inner diameter of the second cylindrical space 112, so that the first annular elastic member 2 abutting against the first end face of the inner gear ring 4 is not easy to fall off from the first cylindrical space 111, thereby ensuring the stability of the first annular elastic member 2 installed in the second cylindrical space 112; the inner diameter of the third cylindrical space 113 is smaller than the inner diameter of the second cylindrical space 112, so that the second annular elastic member 3 abutting against the second end face of the inner gear ring 4 is not easy to fall off from the third cylindrical space 113, thereby ensuring the stability of the second annular elastic member 3 installed in the second cylindrical space 112; in addition, the inner diameter of the first cylindrical space 111 is larger than the inner diameter of the third annular space 113, so that the end of the inner gear ring 4 and the radial elastic member 5 away from the first annular elastic member 2 abuts against the second inner side wall of the second cylindrical space 112 toward the end of the third cylindrical space 113, thereby further ensuring the stability of the inner gear ring 4 and the radial elastic member 5 installed in the internal space 11.

[0040] To further illustrate, the first inner sidewall is the inner sidewall of the second cylindrical space 112 facing one end of the first cylindrical space 111 , and the second inner sidewall is the inner sidewall of the second cylindrical space 112 facing one end of the third cylindrical space 113 .

[0041] The present invention also provides a planetary mechanism in one embodiment, including a sun gear, a planetary gear, a planetary carrier and the above-mentioned ring gear vibration isolation structure; the planetary gear is mounted on the planetary carrier and meshes with the sun gear, and the inner ring gear 4 meshes with the planetary gear. It can be understood that a plurality of planetary gears are provided according to actual needs, and the plurality of planetary gears are all meshed with the sun gear and the inner ring gear 4.

[0042] An embodiment of the utility model further provides a vehicle, comprising the above-mentioned planetary mechanism.

[0043] 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. A gear ring vibration isolation structure, characterized in that: The invention comprises a housing having an internal space, and a first annular elastic member, a second annular elastic member, an inner gear ring and a radial elastic member, all of which are installed in the internal space; the radial elastic member is arranged between the outer ring surface of the inner gear ring and the inner wall of the internal space at intervals; The first annular elastic member, the second annular elastic member and the inner gear ring are coaxially arranged, and the first annular elastic member and the second annular elastic member are arranged at opposite ends of the inner gear ring.

2. The gear ring vibration isolation structure according to claim 1, characterized in that: First grooves are arranged at intervals on the outer ring surface of the inner gear ring, and second grooves are arranged on the inner wall of the inner space at positions opposite to the first grooves; an installation space is enclosed between the first groove and the second groove; and the radial elastic member is installed in the installation space.

3. The gear ring vibration isolation structure according to claim 2, characterized in that: The gear ring vibration isolation structure includes a plurality of radial elastic parts, a plurality of first grooves distributed in annular intervals are provided on the outer ring surface of the inner gear ring, and a plurality of second grooves distributed in annular intervals are provided on the inner wall of the internal space; the installation space is surrounded by the first grooves and the second grooves relative to each other, and the radial elastic parts are installed in the installation space one by one.

4. The gear ring vibration isolation structure according to claim 1, characterized in that: The radial elastic member comprises an elastic pin, and an axis of the elastic pin is parallel to an axis of the inner gear ring.

5. The gear ring vibration isolation structure according to claim 1, characterized in that: An annular groove is provided on the bottom wall of the internal space; the second annular elastic member is installed in the annular groove and abuts against the inner gear ring.

6. The gear ring vibration isolation structure according to claim 1, characterized in that: The second annular elastic member includes a wave washer.

7. The gear ring vibration isolation structure according to claim 1, characterized in that: The first annular elastic member includes an annular retaining spring, and the annular retaining spring abuts against the inner gear ring and the radial elastic member.

8. The gear ring vibration isolation structure according to claim 1, characterized in that: The internal space includes a first cylindrical space, a second cylindrical space and a third cylindrical space which are connected in sequence; the inner diameter of the first cylindrical space is smaller than the inner diameter of the second cylindrical space, and larger than the inner diameter of the third cylindrical space; The inner gear ring is installed in the second cylindrical space, and the radial elastic member is arranged between the outer ring surface of the inner gear ring and the inner wall of the second cylindrical space.

9. A planetary mechanism, characterized in that: It comprises a sun gear, planetary gears, a planetary carrier and a ring gear vibration isolation structure as claimed in any one of claims 1 to 8; the planetary gears are mounted on the planetary carrier and mesh with the sun gear, and the inner ring gear meshes with the planetary gears.

10. A vehicle, characterized in that: Comprising the planetary mechanism as claimed in claim 9.

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