Gear ring assembly and bridge driving system

Abstract

The invention provides a gear ring assembly and a bridge driving system. In the gear ring assembly, the outer circumferential surface of an annular main body of a gear ring is provided with a plurality of mounting convex parts which are arranged at intervals in the circumferential direction of the gear ring assembly. And each vibration reduction sleeve in the plurality of vibration reduction sleeves is fixedly mounted on the corresponding mounting convex part. The supporting base assembly is used for being fixed to a to-be-installed piece, and a plurality of installation grooves are formed in the supporting base assembly. The gear ring is installed on the supporting seat assembly, so that the annular body is located on the radial inner side of the supporting seat assembly, the paired installation protruding parts and the vibration reduction sleeves are located in the corresponding installation grooves, and therefore the supporting seat assembly and the multiple vibration reduction sleeves make contact with each other in the axial direction, the radial direction and the circumferential direction of the gear ring assembly. Therefore, vibration and impact generated between the supporting seat assembly and the gear ring are at least partially buffered and absorbed by the damping sleeve, so that vibration and noise generated by the components are reduced, and the NVH performance of a system is greatly improved.

Description

Technical Field

[0001] The present application relates to a transmission structure of a vehicle, and more particularly to a ring gear assembly and an electric bridge drive system including the ring gear assembly. Background Art

[0002] The electric bridge drive system is an existing vehicle power system, which may include a motor as a power source and a transmission for transmitting the torque of the motor to the outside, and the transmission may include a planetary gear.

[0003] In a typical solution, the ring gear of the planetary gear set and the housing of the electric bridge drive system are assembled together through a spline mechanism so that they cannot rotate relative to each other. Usually, there is a certain gap between the key teeth of the inner spline and the outer spline of the spline mechanism. Therefore, during the operation of the electric bridge drive system, the spline mechanism causes large vibration and noise due to the contact between the key teeth. As a result, the NVH performance of the entire electric bridge drive system is degraded. Although the degree of degradation of NVH performance can be reduced by setting a damping spring and other solutions in the prior art, there are problems such as insufficient optimization effect and high assembly difficulty. Summary of the invention

[0004] This application is made in view of the defects of the above-mentioned prior art. One purpose of this application is to provide a ring gear assembly. After the ring gear assembly and the part to be installed are assembled together, the vibration and noise generated by the two during the operation of the system including the two are small, thereby improving the NVH performance of the above-mentioned system. Another purpose of this application is to provide an electric bridge drive system including the above-mentioned ring gear assembly.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions.

[0006] The present application provides a ring gear assembly, comprising:

[0007] A gear ring having an annular body and a plurality of mounting protrusions, wherein the inner circumferential surface of the annular body is formed with gear teeth, and the plurality of mounting protrusions are disposed on the outer circumferential surface of the annular body and are arranged at intervals in the circumferential direction of the gear ring assembly;

[0008] A plurality of vibration-damping sleeves, each of which is fixedly mounted on a corresponding mounting protrusion; and

[0009] A support seat assembly, which has an annular shape as a whole and is used to be fixed to a part to be installed, the support seat assembly is formed with a plurality of mounting grooves, the ring gear is installed on the support seat assembly so that the annular body is located radially inside the support seat assembly and the mounting protrusion and the vibration damping sleeve are located in the corresponding mounting grooves, the support seat assembly and the plurality of vibration damping sleeves are in contact with each other in the axial, radial and circumferential directions of the ring gear assembly.

[0010] In an optional solution, the mounting protrusion is formed as an arc-shaped structure as a whole, the inner peripheral surface of the mounting protrusion is fixed to the outer peripheral surface of the annular body, and the outer peripheral surface, the axial side surfaces and the circumferential side surfaces of the mounting protrusion are all formed with limited position protrusions.

[0011] The vibration-damping sleeve is formed with a limiting notch corresponding to each of the limiting protrusions, and the limiting protrusion extends into the corresponding limiting notch. The limiting protrusion and the limiting notch cooperate to position the vibration-damping sleeve relative to the corresponding mounting protrusion.

[0012] In another optional solution, in a natural state where the vibration-damping sleeve has not undergone elastic deformation, the vibration-damping sleeve protrudes relative to the limiting protrusion in the axial direction, the radial direction and the circumferential direction.

[0013] In another optional scheme, the support seat assembly includes a support seat and a limit plate fixed to each other, the mounting groove is formed on the support seat and has an opening open toward one axial side, and the limit plate is fixed to the support seat from one axial side to close the opening, so that the support seat and the limit plate clamp the mounting protrusion and the vibration damping sleeve in the axial direction.

[0014] In another optional solution, the support seat is formed with a plurality of first mounting holes, the plurality of first mounting holes are arranged spaced apart in the circumferential direction, and each of the first mounting holes extends along the axial direction.

[0015] The limiting plate is formed with a plurality of inserting portions, each of which is inserted into the first mounting hole, and the inserting portion is interference fit with the first mounting hole, so that the limiting plate and the supporting seat are fixed to each other.

[0016] In another optional scheme, the first mounting hole passes through the support seat, and the limiting plate is formed with a second mounting hole that passes through along the axial direction. The second mounting hole is connected to the first mounting hole, so that the support seat assembly can be fixedly installed together with the part to be installed via a mounting part inserted into the first mounting hole and the second mounting hole.

[0017] In another optional solution, the gear ring and the support seat assembly are made of steel, and the vibration damping sleeve is made of rubber or plastic.

[0018] The present application also provides an electric bridge drive system, comprising a ring gear assembly as described in any one of the above technical solutions.

[0019] In an optional scheme, it also includes a housing, a sun gear and a planetary gear. The support seat assembly of the ring gear assembly is fixed to the housing serving as the part to be installed. The planetary gear is located between the sun gear and the ring gear of the ring gear assembly and meshes with the sun gear and the ring gear.

[0020] In another optional solution, a plurality of mounting members are further included, the shell is formed with a plurality of threaded holes, each of the mounting members passes through the support seat assembly along the axial direction and is threadedly connected to the corresponding threaded hole, thereby fixing the support seat assembly to the shell.

[0021] By adopting the above technical solution, the present application provides a ring gear assembly and an electric bridge drive system including the ring gear assembly. In the ring gear assembly, a ring gear, a plurality of vibration-damping sleeves and a support seat assembly are assembled together. The inner circumferential surface of the annular body of the ring gear is formed with gear teeth, and the outer circumferential surface of the annular body is provided with a plurality of mounting protrusions arranged at intervals in the circumferential direction of the ring gear assembly. Each of the plurality of vibration-damping sleeves is made of an elastic material such as rubber, plastic, etc., and each vibration-damping sleeve is fixedly mounted on a corresponding mounting protrusion. The support seat assembly is used to be fixed to the part to be mounted, and the support seat assembly is further formed with a plurality of mounting grooves. The ring gear is mounted on the support seat assembly so that the annular body is located radially inside the support seat assembly and the paired mounting protrusions and vibration-damping sleeves are located in the corresponding mounting grooves, whereby the support seat assembly and the plurality of vibration-damping sleeves are in contact with each other in the axial, radial and circumferential directions of the ring gear assembly.

[0022] In this way, when the system including the ring gear assembly (such as an electric bridge drive system) is in operation, since the support seat assembly and the plurality of vibration-damping sleeves are in contact with each other, the vibration and impact generated between the support seat assembly and the ring gear are at least partially buffered and absorbed by the vibration-damping sleeves, thereby reducing the vibration and noise generated by these components when the support seat assembly is fixed to the part to be installed (such as the housing of the electric bridge drive system), thereby improving the NVH performance of the entire electric bridge drive system. Furthermore, since the support seat assembly and the plurality of vibration-damping sleeves are in contact with each other in the axial, radial and circumferential directions of the ring gear assembly, they can absorb vibrations and impacts in all directions, thereby greatly improving the NVH performance of the system. Moreover, the structure of the entire ring gear assembly is simple, which is conducive to large-scale industrial production and simplifies the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A is a perspective schematic diagram showing a ring gear assembly according to an embodiment of the present application.

[0024] Figure 1B It shows Figure 1A A partial cross-sectional schematic diagram of the ring gear assembly in FIG.

[0025] Figure 1CIt shows Figure 1A A three-dimensional schematic diagram of the assembly of the ring gear and the damping sleeve of the ring gear assembly.

[0026] Figure 1D It shows Figure 1C Schematic diagram of the front view of the assembly.

[0027] Figure 1E It shows Figure 1C Schematic top view of the assembly.

[0028] Figure 2A It shows Figure 1A A three-dimensional schematic diagram of the ring gear of the ring gear assembly in FIG.

[0029] Figure 2B It shows Figure 2A Another three-dimensional schematic diagram of the ring gear in .

[0030] Figure 2C It shows Figure 2A Schematic diagram of the front view of the gear ring in.

[0031] Figure 3A It shows Figure 1A A three-dimensional schematic diagram of the vibration damping sleeve of the ring gear assembly.

[0032] Figure 3B It shows Figure 3A Another three-dimensional schematic diagram of the vibration damping sleeve in FIG.

[0033] Figure 4A It shows Figure 1A A three-dimensional schematic diagram of the support seat of the ring gear assembly.

[0034] Figure 4B It shows Figure 4A A schematic diagram of the main view of the support seat in FIG.

[0035] Figure 5A It shows Figure 1A A three-dimensional schematic diagram of the limit plate of the ring gear assembly.

[0036] Figure 5B It shows Figure 5A Another three-dimensional schematic diagram of the limiting plate in FIG.

[0037] Figure 5C It shows Figure 5A Schematic diagram of the main view of the limiting plate.

[0038] Fig. 6A is a three-dimensional schematic diagram showing a structure formed by a partial structure of an electric bridge drive system according to an embodiment of the present application, including Figure 1A The ring gear assembly and the housing are in an assembled state.

[0039] Figure 6B It shows Fig. 6A A schematic partial cross-sectional view of the structure in FIG.

[0040] Figure 6C It shows Fig. 6A Schematic diagram of the decomposition structure of the structure in .

[0041] Fig. 7A It shows Fig. 6A A three-dimensional schematic diagram of the housing of the electric bridge drive system.

[0042] Figure 7B It shows Fig. 7A Schematic diagram of the main view of the shell in.

[0043] Description of Reference Numerals

[0044] 1 gear ring; 11 annular body; 11t gear teeth; 12 mounting convex portion; 12p1 axial limiting convex portion; 12p2 radial limiting convex portion; 12p3 circumferential limiting convex portion;

[0045] 2 vibration damping sleeve; 2h1 axial limit notch; 2h2 radial limit notch; 2h3 circumferential limit notch;

[0046] 3 support seat assembly; 31 support seat; 31c mounting groove; 31h first mounting hole; 32 limit plate; 32p insertion portion; 32h second mounting hole;

[0047] 4 shell; 4h threaded hole;

[0048] 5. Mounting parts;

[0049] A is axial; R is radial; C is circumferential. DETAILED DESCRIPTION

[0050] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all feasible methods of the present application, nor to limit the scope of the present application.

[0051] In the present application, "axial", "radial" and "circumferential" refer to the axial, radial and circumferential directions of the ring gear assembly, respectively. "Drive connection" refers to the connection of two components in a manner capable of transmitting torque, including direct and indirect connection of the two components.

[0052] The following will first describe a ring gear assembly according to an embodiment of the present application in conjunction with the accompanying drawings.

[0053] like Figure 1A and Figure 1BAs shown, the ring gear assembly according to an embodiment of the present application includes a ring gear 1, a plurality of vibration-damping sleeves 2 and a support seat assembly 3 assembled together. The plurality of vibration-damping sleeves 2 are sleeved on the corresponding mounting protrusions 12 of the ring gear 1, and then the assembly consisting of the vibration-damping sleeves 2 and the ring gear 1 is installed on the support seat assembly 3.

[0054] In this embodiment, the gear ring 1 can be made of a rigid material such as steel. Figures 1A to 1E as well as FIG. 2A to FIG. 2C As shown, the gear ring 1 includes an annular body 11 and a plurality of mounting protrusions 12 formed as one body. The annular body 11 is formed with a plurality of gear teeth 11t protruding radially inward on its inner circumference, and these gear teeth 11t are used to achieve tooth engagement with the planetary gears of the planetary gear row. In this embodiment, six mounting protrusions 12 are provided, and these mounting protrusions 12 are provided on the outer circumference of the annular body 11 and are evenly distributed at intervals in the circumferential direction C. Each mounting protrusion 12 is formed as an arc-shaped structure as a whole, and specifically, the mounting protrusion 12 extends a certain length along the circumferential direction C as a whole, and in addition, the mounting protrusion 12 has a certain width in the axial direction A and a certain thickness in the radial direction R. Furthermore, the mounting protrusion 12 is formed as a three-dimensional structure with six faces. The entire inner circumference of the mounting protrusion 12 is fixed to the outer circumference of the annular body 11, and each of the axial side surfaces, the outer circumferential side surfaces and the circumferential side surfaces of the mounting protrusion 12 is formed with limiting protrusions 12p1, 12p2, 12p3 (two axial limiting protrusions 12p1, one radial limiting protrusion 12p2 and two circumferential limiting protrusions 12p3). These limiting protrusions 12p1, 12p2, 12p3 cooperate with the limiting notches 2h1, 2h2, 2h3 of the vibration damping sleeve 2 to fix the vibration damping sleeve 2 on the corresponding limiting protrusions 12p1, 12p2, 12p3.

[0055] In this embodiment, the vibration damping sleeve 2 can be made of elastic materials such as rubber and plastic. Figures 1A to 1E as well as Figure 3A and Figure 3BAs shown, in this embodiment, six vibration damping sleeves 2 are provided, and the vibration damping sleeves 2 have a shape matching the mounting protrusion 12, so that the vibration damping sleeves 2 can be fitted on the mounting protrusion 12, and thus assembled together in pairs. Each wall portion of the vibration damping sleeve 2 surrounds and forms an installation space, and the installation space has an installation opening open to one side, so that the mounting protrusion 12 can be inserted into the vibration damping sleeve 2 through the installation opening. Each wall portion of the vibration damping sleeve 2 is also formed with limiting notches 2h1, 2h2, and 2h3 corresponding to each limiting protrusion 12p1, 12p2, and 12p3 formed on the mounting protrusion 12. Specifically, the two axial wall portions of the vibration damping sleeve 2 are respectively formed with axial limiting notches 2h1 corresponding to the axial limiting protrusion 12p1, the outer peripheral wall portion of the vibration damping sleeve 2 is formed with radial limiting notches 2h2 (in the shape of a hole) corresponding to the radial limiting protrusion 12p2, and the two circumferential wall portions of the vibration damping sleeve 2 are respectively formed with circumferential limiting notches 2h3 corresponding to the circumferential limiting protrusion 12p3. In this way, the vibration-damping sleeve 2 is positioned relative to the corresponding mounting protrusion 12 through the cooperation between the limiting protrusions 12p1, 12p2, 12p3 and the limiting notches 2h1, 2h2, 2h3.

[0056] In addition, if Figure 1C to Figure 1E As shown, in the natural state where the vibration damping sleeve 2 has not undergone elastic deformation, the vibration damping sleeve 2 protrudes toward the support seat assembly 3 relative to the limiting protrusions 12p1, 12p2, 12p3 in the axial direction A, radial direction R and circumferential direction C. In other words, the outer side surface of each wall portion of the vibration damping sleeve 2 is located at a position further outward than the outer side surface of the corresponding limiting protrusions 12p1, 12p2, 12p3. Taking the radial limiting protrusion 12p2 as an example, the radial outer side surface of the outer peripheral wall portion of the vibration damping sleeve 2 is located at a position radially outward than the radial outer side surface of the radial limiting protrusion 12p2. Therefore, in the state where the assembly of the gear ring 1 and the vibration damping sleeve 2 is installed on the support seat assembly 3, the vibration damping sleeve 2 abuts against the support seat assembly 3 in the axial direction A, radial direction R and circumferential direction C, thereby fully exerting the vibration damping and buffering effects of the vibration damping sleeve 2.

[0057] In this embodiment, the support base assembly 3 can be made of a rigid material such as steel. Figure 1A , Figure 1B as well as FIG. 4A to FIG. 5CAs shown, the support seat assembly 3 has an annular shape as a whole and is used to be fixed to the housing 4 as a to-be-mounted part. The support seat assembly 3 includes a support seat 31 and a stop plate 32 fixed to each other. The inner circumference of the support seat 31 is formed with a mounting groove 31c that matches the shape of the mounting protrusion 12 on which the vibration damping sleeve 2 is mounted, and the mounting groove 31c is formed with an opening that is open toward one axial side and radially inward, so that both the vibration damping sleeve 2 and the mounting protrusion 12 can be installed in the mounting groove 31c from one axial side. Further, the stop plate 32 is fixed to the support seat 31 from one axial side so that the support seat 31 and the stop plate 32 clamp the mounting protrusion 12 and the vibration damping sleeve 2 in the axial direction A. In addition, the support seat 31 is formed with a plurality of first mounting holes 31h, for example six, which are arranged at intervals in the circumferential direction C, and each first mounting hole 31h extends through the support seat 31 along the axial direction A. Furthermore, several of the plurality of first mounting holes 31h, for example, two first mounting holes 31h (spaced 180 degrees apart at a central angle), are formed as stepped holes, and a portion of the stepped holes is interference-fitted with the insertion portion 32p formed by the limiting plate 32, thereby enabling the limiting plate 32 and the support seat 31 to be fixed to each other without using other components. Corresponding to the first mounting holes 31h of the support seat 31, the limiting plate 32 is formed with a plurality of second mounting holes 32h that pass through along the axial direction A, and the second mounting holes 32h are connected to the first mounting holes 31h, so that the support seat assembly 3 can be fixedly installed together with the housing 4 as the part to be installed via the mounting member 5 inserted into the first mounting hole 31h and the second mounting hole 32h (see Figure 6B and Figure 6C ).

[0058] The following describes an electric axle drive system including the above-mentioned ring gear assembly.

[0059] like FIG. 6A to FIG. 6CAs shown, the electric bridge drive system according to the first embodiment of the present application may include the above-mentioned ring gear assembly and housing 4 and other components of the motor and the transmission that are not shown, and the motor and the transmission are connected in a transmission, so that the torque of the motor can be transmitted to the outside through the transmission. The transmission can be installed in the housing 4 of the electric bridge drive system and include a planetary row. Typically, the planetary row can be composed of a sun gear, a planetary gear, a planetary gear carrier and a ring gear 1 in the above-mentioned ring gear assembly assembled together. The sun gear can be connected to the motor in a transmission manner. A plurality of planetary gears can be located radially outside the sun gear and evenly distributed along the circumference, and each planetary gear is meshed with the sun gear in a gear-meshed manner, so that as the sun gear rotates, each planetary gear can rotate around its own central axis and revolve around the sun gear. The planetary gear carrier is located radially outside the sun gear, and a plurality of planetary gears are installed on the planetary gear carrier, and the planetary gear carrier can transmit torque to the outside and receive torque from the outside. The rotation of the planetary gear carrier can drive the plurality of planetary gears to revolve, and the revolution of the plurality of planetary gears can also drive the planetary gear carrier to rotate. The ring gear 1 is located radially outside the plurality of planetary gears, and an orbit for the plurality of planetary gears to revolve is formed between the ring gear 1 and the sun gear. The ring gear 1 is always in meshing engagement with the plurality of planetary gears.

[0060] Furthermore, if FIG. 6A to FIG. 6C as well as Fig. 7A and Figure 7B As shown, in the electric bridge drive system according to an embodiment of the present application, the housing 4 is formed with threaded holes 4h corresponding to the mounting holes 31h and 32h of the support seat assembly 3, and the housing 4 and the support seat assembly 3 are fixed to each other and cannot rotate relative to each other by using the mounting member 5 that passes through the support seat assembly 3 along the axial direction A and is threadedly connected to the corresponding threaded hole 4h. In this way, it is basically achieved that the ring gear 1 is relatively fixed relative to the housing 4, and the torque can be output toward the outside through the planetary wheel carrier of the planetary gear when the motor inputs the torque through the sun gear of the planetary gear.

[0061] By adopting the above technical solution, when the electric bridge drive system including the above ring gear assembly is in working state, since the multiple vibration damping sleeves 2 and the support seat assembly 3 are in contact with each other, the vibration and impact that may be generated between the ring gear 1 and the support seat assembly 3 are at least partially buffered and absorbed by the vibration damping sleeve 2, so that when the support seat assembly 3 and the housing 4 are fixed to each other, the vibration and noise generated by the ring gear assembly 1 and the housing 4 during the operation of the electric bridge drive system are reduced, thereby improving the NVH performance of the entire electric bridge drive system. Furthermore, since the multiple vibration damping sleeves 2 and the support seat assembly 3 are in contact with each other in the three directions of axial A, radial R and circumferential C, they can absorb vibrations and impacts in various directions, thereby greatly improving the NVH performance. Moreover, the structure of the entire ring gear assembly is simple, which is conducive to large-scale industrial production and simplifies the assembly process.

[0062] The present application is not limited to the embodiments listed in the above specific implementation manner, and the technical solution of the present application is supplemented as follows.

[0063] i. The ring gear assembly of the present application can be applied to an oil-cooled electric bridge drive system, but is not limited to being applied to an electric bridge drive system, and can also be applied to other vehicle power systems. For example, the ring gear assembly of the present application can be used in a transmission, and the transmission can be assembled with the motor or installed in a housing together with the motor to form an electric bridge drive system.

[0064] ii. In a variation of the present application, it is not necessary to install a vibration-damping sleeve 2 on each mounting protrusion 12, and the vibration-damping sleeve 2 may be installed only on some mounting protrusions 12. For example, a vibration-damping sleeve 2 may be installed on every other mounting protrusion 12.

[0065] iii. It can be understood that since the gear ring assembly composed of the gear ring 1, the vibration damping sleeve 2 and the support seat assembly 3 are fixed to each other and form a whole after being assembled in place, it is convenient to manage and transport, and it is also convenient to use the mounting parts 5 (such as bolts) to assemble the support seat assembly 3 and the shell 4 together through threaded connection. In addition, since the assembly between the support seat assembly 3 and the shell 4 can be achieved by threaded connection, the structural complexity of the mold used to form the shell 4 can be reduced and the difficulty of processing the shell 4 can be reduced, thereby reducing the cost of the shell 4. Moreover, using the technical solution of the present application, the retaining ring for axially limiting the existing gear ring 1 and the shell 4 is also omitted, thereby improving the limiting reliability between the support seat assembly 3 and the shell 4 and preventing them from loosening.

[0066] iv. It can be understood that by providing the limiting protrusions 12p1, 12p2, and 12p3 on the mounting protrusion 12, on the one hand, the positioning effect between the vibration damping sleeve 2 and the mounting protrusion 12 can be improved, and the possible falling off of the gear ring 1 and the vibration damping sleeve 2 during the installation in the mounting groove 31c of the support seat 31 can be greatly reduced; on the other hand, the vibration damping sleeve 2 can be prevented from being excessively squeezed and damaged by both the gear ring 1 and the support seat assembly 3.

[0067] v. Since the gear ring 1 and the support seat assembly 3 are both made of steel, the mechanical properties are improved compared to aluminum alloy, so the number of gear teeth 11t of the gear ring 1 can be greatly reduced, the difficulty of processing the gear ring 1 is reduced, and the cost is saved.

[0068] vi. reference Figure 1A , Figure 6C and Fig. 7AThe portion of the support seat assembly 3 where the first mounting hole 31h is formed is formed with a protrusion protruding radially outward, and the housing 4 is formed with a groove corresponding to the protrusion. In this way, the cooperation between the protrusion and the groove can assist in bearing the circumferential force, that is, keep the support seat assembly 3 and the gear ring 1 fixed relative to the housing 4. In this way, the installation strength is ensured with a compact structure.

Claims

1. A ring gear assembly, characterized in that: include: A gear ring (1) comprising an annular body (11) and a plurality of mounting protrusions (12), wherein the inner circumferential surface of the annular body (11) is formed with gear teeth (11t), and the plurality of mounting protrusions (12) are arranged on the outer circumferential surface of the annular body (11) and are spaced apart in the circumferential direction (C) of the gear ring assembly; A plurality of vibration-damping sleeves (2), each of the vibration-damping sleeves (2) being fixedly mounted on a corresponding mounting protrusion (12); and A support seat assembly (3) which has an annular shape as a whole and is used to be fixed to a to-be-mounted component, the support seat assembly (3) being formed with a plurality of mounting grooves (31c), the ring gear (1) being mounted on the support seat assembly (3) such that the annular body (11) is located radially inward of the support seat assembly (3) and the mounting protrusion (12) and the vibration-damping sleeve (2) are located in the corresponding mounting grooves (31c), the support seat assembly (3) and the plurality of vibration-damping sleeves (2) are in contact with each other in the axial direction (A), radial direction (R) and circumferential direction (C) of the ring gear assembly.

2. The ring gear assembly according to claim 1, characterized in that: The mounting protrusion (12) is formed as an arc-shaped structure as a whole, the inner peripheral surface of the mounting protrusion (12) is fixed to the outer peripheral surface of the annular body (11), and the outer peripheral surface, the axial side surfaces and the circumferential side surfaces of the mounting protrusion (12) are all formed with limited position protrusions (12p1, 12p2, 12p3), The vibration-damping sleeve (2) is formed with limiting notches (2h1, 2h2, 2h3) corresponding to the limiting protrusions (12p1, 12p2, 12p3), and the limiting protrusions (12p1, 12p2, 12p3) extend into the corresponding limiting notches (2h1, 2h2, 2h3). The limiting protrusions (12p1, 12p2, 12p3) cooperate with the limiting notches (2h1, 2h2, 2h3) so that the vibration-damping sleeve (2) and the corresponding mounting protrusions (12) are relatively positioned.

3. The ring gear assembly according to claim 2, characterized in that: In a natural state where the vibration-damping sleeve (2) has not undergone elastic deformation, the vibration-damping sleeve (2) protrudes relative to the limiting protrusions (12p1, 12p2, 12p3) in the axial direction (A), the radial direction (R), and the circumferential direction (C).

4. The ring gear assembly according to any one of claims 1 to 3, characterized in that: The support seat assembly (3) comprises a support seat (31) and a limiting plate (32) fixed to each other, the mounting groove (31c) being formed on the support seat (31) and having an opening open toward one axial side, the limiting plate (32) being fixed to the support seat (31) from one axial side to close the opening, so that the support seat (31) and the limiting plate (32) clamp the mounting protrusion (12) and the vibration damping sleeve (2) in the axial direction (A).

5. The ring gear assembly according to claim 4, characterized in that: The support seat (31) is formed with a plurality of first mounting holes (31h), the plurality of first mounting holes (31h) are arranged at intervals in the circumferential direction (C), and each of the first mounting holes (31h) extends along the axial direction (A). The limiting plate (32) is formed with a plurality of insertion portions (32p), each insertion portion (32p) is inserted into the first mounting hole (31h), and the insertion portion (32p) is interference fit with the first mounting hole (31h), so that the limiting plate (32) and the support seat (31) are fixed to each other.

6. The ring gear assembly according to claim 5, characterized in that: The first mounting hole (31h) passes through the support seat (31), and the limiting plate (32) is formed with a second mounting hole (32h) passing through along the axial direction (A), and the second mounting hole (32h) is connected to the first mounting hole (31h), so that the support seat assembly (3) can be fixedly installed together with the to-be-installed component via a mounting component (5) inserted into the first mounting hole (31h) and the second mounting hole (32h).

7. The ring gear assembly according to any one of claims 1 to 3, characterized in that: The gear ring (1) and the support seat assembly (3) are made of steel, and the vibration damping sleeve (2) is made of rubber or plastic.

8. A bridge drive system, characterized in that: A ring gear assembly comprising any one of claims 1 to 7.

9. The electric bridge drive system according to claim 8, characterized in that: It also includes a housing (4), a sun gear and planetary gears, wherein the support seat assembly (3) of the ring gear assembly is fixed to the housing (4) as the part to be installed, and the planetary gear is located between the sun gear and the ring gear (1) of the ring gear assembly and meshes with the sun gear and the ring gear (1).

10. The electric bridge drive system according to claim 9, characterized in that: It also includes a plurality of mounting members (5), the shell (4) is formed with a plurality of threaded holes (4h), each of the mounting members (5) passes through the support seat assembly (3) along the axial direction (A) and is threadedly connected to the corresponding threaded hole (4h), thereby allowing the support seat assembly (3) to be fixedly mounted on the shell (4).

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