Speed reducer assembly

Abstract

The speed reducer assembly comprises a speed reducer shell and a speed reducer body, the speed reducer shell comprises a main shell and two cover plates, the two cover plates cover openings in the two opposite sides of the main shell respectively, and a first installation cavity and a second installation cavity are symmetrically formed in the main shell; the number of the speed reducer bodies is two, and the two speed reducer bodies are symmetrically mounted in the first mounting cavity and the second mounting cavity. The two sets of speed reducer bodies are integrated in one speed reducer shell, two wheels can be independently controlled, arrangement is reasonable, the structure is compact, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a speed reducer assembly. Background Art

[0002] When the existing vehicle is driven, the power of the motor is transmitted to the speed reducer, and the speed reducer transmits the power to two wheel axles to drive the two wheel axles to rotate synchronously. The power mechanism in this way cannot realize the independent drive of the two wheels, the power is small, and the flexibility of the vehicle is insufficient.

[0003] In order to realize the independent drive of two coaxial wheels, some vehicle models are provided with two sets of electric drives and speed reducers. However, the overall structure is complex and occupies a large space.

[0004] Therefore, it is necessary to design a speed reducer assembly that can separately control two wheels and has a compact structure. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a speed reducer assembly that can separately control two wheels and has a compact structure.

[0006] The technical solution of the utility model provides a speed reducer assembly, which includes a speed reducer housing and a speed reducer body. The speed reducer housing includes a main housing and two covers. The two covers are respectively covered on the openings on the opposite sides of the main housing. A first installation cavity and a second installation cavity are symmetrically arranged in the main housing. The speed reducer body includes two groups, and the two groups of speed reducer bodies are symmetrically installed in the first installation cavity and the second installation cavity.

[0007] Further, the speed reducer body includes an input shaft system, an intermediate shaft system, and an output shaft system. The input shaft system is used to connect with the motor, and the output shaft system is used to connect with the wheel axle.

[0008] Further, the input shaft system includes an input gear, the intermediate shaft system includes an intermediate large gear and an intermediate small gear. The intermediate large gear and the intermediate small gear are coaxially and fixedly connected. The input gear meshes with the intermediate large gear. The output shaft system includes an output gear, and the output gear meshes with the intermediate small gear.

[0009] Further, it further includes an oil injection assembly. The oil injection assembly is installed in the first installation cavity and the second installation cavity. The oil injection assembly is used to transport the oil liquid at the bottom of the first installation cavity and the second installation cavity to the intermediate shaft system and the input shaft system.

[0010] Further, the fuel injection assembly includes a collection tank, a drive gear, an oil pump, a delivery pipe, and an oil nozzle. The collection tank is located at the bottom of the first installation cavity and the second installation cavity. The drive gear meshes with the output gear, and the drive gear is drivingly connected to the oil pump. The delivery pipe connects the collection tank, the oil pump, and the oil nozzle.

[0011] Further, the oil nozzle includes a bearing oil nozzle and a gear oil nozzle;

[0012] The bearing oil nozzle is arranged along the axial direction. The middle section of the bearing oil nozzle is directly connected to the delivery pipe, and both ends of the bearing oil nozzle extend above the input bearings of the input shaft system respectively;

[0013] The gear oil nozzle is perpendicular to the bearing oil nozzle and extends from the middle section of the bearing oil nozzle. The gear oil nozzle extends above the intermediate large gear.

[0014] Further, a first input bearing installation groove is provided on the inner wall of the main housing, and a plurality of first ribs distributed radially are provided outside the first input bearing installation groove;

[0015] A second input bearing installation groove is provided on the inner wall of the cover plate, and a plurality of second ribs distributed radially are provided outside the second input bearing installation groove;

[0016] Both ends of the bearing oil nozzle extend to the positions of the first ribs and the second ribs respectively.

[0017] Further, a first output bearing installation groove is also provided on the inner wall of the main housing, and a plurality of third ribs distributed radially are provided outside the first output bearing installation groove;

[0018] A second output bearing installation groove is provided on the inner wall of the cover plate, and a plurality of fourth ribs distributed radially are provided outside the second output bearing installation groove.

[0019] Further, a first intermediate bearing installation groove is provided on the inner wall of the main housing;

[0020] A second intermediate bearing installation groove is provided on the inner wall of the cover plate, and a plurality of fifth ribs distributed radially are provided outside the second intermediate bearing installation groove.

[0021] Further, a plurality of installation positions are provided below the first intermediate bearing installation groove on the inner wall of the main housing, and the installation positions are used for installing the oil pump.

[0022] After adopting the above technical solution, the following beneficial effects are obtained:

[0023] The utility model integrates two sets of reducer bodies in a reducer housing, can separately control two wheels individually, and has reasonable layout, compact structure and small occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Referring to the drawings, the disclosure of the utility model will become more understandable. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the utility model. In the drawings:

[0025] Figure 1 is a perspective view of a reducer assembly in an embodiment of the utility model;

[0026] Figure 2 is an exploded view of a reducer assembly in an embodiment of the utility model;

[0027] Figure 3 is a front view of a reducer body in an embodiment of the utility model;

[0028] Figure 4 is a top view of a reducer body in an embodiment of the utility model;

[0029] Figure 5 is a schematic diagram of a reducer body and an oil injection assembly in an embodiment of the utility model;

[0030] Figure 6 is a schematic diagram of a main housing and an oil injection assembly in an embodiment of the utility model;

[0031] Figure 7 is Figure 6 a partially enlarged view of;

[0032] Figure 8 is a schematic diagram of a main housing in an embodiment of the utility model;

[0033] Figure 9 is a front view of a main housing in an embodiment of the utility model;

[0034] Figure 10 is a perspective view of a cover plate in an embodiment of the utility model.

[0035] Corresponding Table of Reference Numerals:

[0036] Reducer housing 1: Main housing 11, Cover plate 12, Honeycomb structure 110, First input bearing installation groove 111, First output bearing installation groove 112, First intermediate bearing installation groove 113, First rib 114, Third rib 115, Installation position 116, Second input bearing installation groove 121, Second output bearing installation groove 122, Second intermediate bearing installation groove 123, Second rib 124, Fourth rib 125, Fifth rib 126;

[0037] Reducer body 2: input shaft system 21, intermediate shaft system 22, output shaft system 23, input gear 211, intermediate large gear 221, intermediate small gear 222, output gear 231;

[0038] Fuel injection assembly 3: collection tank 31, drive gear 32, oil pump 33, delivery pipe 34, oil nozzle 35, bearing oil nozzle 351, gear oil nozzle 352, bearing oil hole 3511, gear oil hole 3521. Specific embodiments

[0039] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings.

[0040] It is easy to understand that according to the technical solution of the present invention, under the condition of not changing the essential spirit of the present invention, there are various structural forms and implementation manners that can be mutually replaced by those of ordinary skill in the art. Therefore, the following specific embodiments and the accompanying drawings are only illustrative descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0041] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts, and therefore may change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0042] In some embodiments of the present invention, as Figures 1 - 2 shown, the reducer assembly includes a reducer housing 1 and a reducer body 2. The reducer housing 1 includes a main housing 11 and two cover plates 12. The two cover plates 12 are respectively covered on the openings on the opposite sides of the main housing 11. A first installation cavity and a second installation cavity are symmetrically arranged in the main housing 11. The reducer body 2 includes two groups, and the two groups of reducer bodies 2 are symmetrically installed in the first installation cavity and the second installation cavity.

[0043] Specifically, as Figure 1 shown, the reducer housing 1 is an integral body, and the two groups of reducer bodies 2 are integrated inside the reducer housing 1, making the overall structure of the reducer assembly compact and occupying a small space.

[0044] As Figure 2 shown, the first installation cavity and the second installation cavity are symmetrically arranged on the left and right sides of the reducer housing 1. The left and right sides of the main housing 11 are open, and the two cover plates 12 are respectively covered on the openings on the left and right sides of the main housing 11 to close the first installation cavity and the second installation cavity. The two sets of reducer bodies 2 are respectively installed in the first installation cavity and the second installation cavity.

[0045] In this embodiment, two sets of reducer bodies 2 are integrated in a reducer housing 1, which can separately control two wheels individually, and is reasonably arranged, compact in structure and small in occupied space.

[0046] Preferably, as Figure 1 shown, a honeycomb structure 110 is provided on the outer surface of one side of the main housing 11. The honeycomb structure 110 can improve the stiffness and strength of the housing and improve the NVH performance.

[0047] Furthermore, as Figure 3 shown, the reducer body 2 includes an input shaft system 21, an intermediate shaft system 22 and an output shaft system 23. The input shaft system 21 is used to connect with the motor, and the output shaft system 23 is used to connect with the wheel shaft. The power of the motor is transmitted to the input shaft system 21, the input shaft system 21 is then transmitted to the intermediate shaft system 22, and then from the intermediate shaft system 22 to the output shaft system 23, and finally from the output shaft system 23 to the wheel shaft to drive the rotation of the wheel.

[0048] Furthermore, as Figure 4 shown, the input shaft system 21 includes an input gear 211, the intermediate shaft system 22 includes an intermediate large gear 221 and an intermediate small gear 222. The intermediate large gear 221 and the intermediate small gear 222 are coaxially and fixedly connected. The input gear 211 meshes with the intermediate large gear 221. The output shaft system 23 includes an output gear 231, and the output gear 231 meshes with the intermediate small gear 222.

[0049] During transmission, the input gear 211 drives the intermediate large gear 221 to rotate, the intermediate large gear 221 drives the intermediate small gear 222 to rotate, and the intermediate small gear 222 drives the output gear 231 to rotate.

[0050] Since the diameter of the input gear 211 is smaller than the diameter of the intermediate large gear 221, a first speed change occurs during the transmission process. The rotational speeds of the intermediate large gear 221 and the intermediate small gear 222 are the same. The diameter of the intermediate small gear 222 is smaller than the diameter of the output gear 231, and a second speed change occurs during the transmission process. Through the transmission of the reducer body 2, the speed is changed.

[0051] Furthermore, as Figures 5 - 6 shown, it further includes an oil injection assembly 3. The oil injection assembly 3 is installed in the first installation cavity and the second installation cavity. The oil injection assembly 3 is used to deliver the oil fluid at the bottom of the first installation cavity and the second installation cavity to the intermediate shaft system 22 and the input shaft system 21.

[0052] As Figure 6As shown in the figure, one end of the oil injection component 3 is installed at the bottom of the main housing 11, and the other end extends to the positions of the input shaft system 21 and the intermediate shaft system 22. The oil injection component 3 can transport the oil at the bottom of the first installation cavity and the second installation cavity to the input shaft system 21 and the intermediate shaft system 22, and spray oil to cool the input shaft system 21 and the intermediate shaft system 22.

[0053] Since the diameter of the output gear 231 of the output shaft system 23 is relatively large, the lower half of the output gear 231 is immersed in the oil. Therefore, when the output gear 231 rotates, it can drive and splash the oil upward, playing a cooling role. However, the input shaft system 21 and the intermediate shaft system 22 are at a certain distance from the bottom of the installation cavity, and the direct splashing of the oil has a poor cooling effect. Therefore, it is necessary to drive the oil to the intermediate shaft system 22 and the input shaft system 21 through the oil injection component 3 to achieve a better cooling effect.

[0054] Furthermore, as Figure 5 shown, the oil injection component 3 includes a collection tank 31, a driving gear 32, an oil pump 33, a delivery pipe 34, and an oil nozzle 35. The collection tank 31 is located at the bottom of the first installation cavity and the second installation cavity. The driving gear 32 is meshed with the output gear 231, the driving gear 32 is drivingly connected to the oil pump 33, and the delivery pipe 34 connects the collection tank 31, the oil pump 33, and the oil nozzle 35.

[0055] Specifically, the collection tank 31 is located below the output gear 231 and at the bottom of the first installation cavity and the second installation cavity. The driving gear 32 is drivingly connected to the oil pump 33 and is meshed with the output gear 231. When the output gear 231 rotates, the output gear 231 drives the driving gear 32 to rotate, the driving gear 32 drives the oil pump 33 to work, the oil pump 33 pumps the oil in the collection tank 31 into the delivery pipe 34, and finally sprays out from the oil nozzle 35. The oil nozzle 35 leads to the input shaft system 21 and the intermediate shaft system 22.

[0056] When the driving gear 32 rotates, it can also stir the oil at the bottom and drive the oil to the upper intermediate shaft system 22.

[0057] Furthermore, as Figures 6 - 7 shown, the oil nozzle 35 includes a bearing oil nozzle 351 and a gear oil nozzle 352;

[0058] The bearing oil nozzle 351 is arranged along the axial direction. The middle section of the bearing oil nozzle 351 is directly connected to the delivery pipe 34, and both ends of the bearing oil nozzle 351 extend above the input bearings of the input shaft system 21 respectively;

[0059] The gear oil nozzle 352 is perpendicular to the bearing oil nozzle 351 and extends from the middle section of the bearing oil nozzle 351, and the gear oil nozzle 352 extends above the intermediate large gear 221.

[0060] Specifically, a bearing oil hole 3511 is provided at each end of the bearing oil nozzle 351. The bearing oil hole 3511 sprays oil into the upper part of the input bearing of the input shaft system 21 to cool the input bearing. The gear oil nozzle 352 is provided with a gear oil hole 3521. The gear oil hole 3521 sprays oil towards the large intermediate gear 221, and the oil can flow from the large intermediate gear 221 to the input gear 211, so as to cool the large intermediate gear 221 and the input gear 211.

[0061] Further, as Figures 8 - 10 shown, a first input bearing mounting groove 111 is provided on the inner wall of the main housing 11, and a plurality of first ribs 114 distributed radially are provided outside the first input bearing mounting groove 111;

[0062] The inner wall of the cover plate 12 is provided with a second input bearing mounting groove 121, and a plurality of second ribs 124 distributed radially are provided outside the second input bearing mounting groove 121;

[0063] Both ends of the bearing oil nozzle 351 extend into the positions of the first rib 114 and the second rib 124 respectively.

[0064] Specifically, after the cover plate 12 is fastened to the main housing 11, the two input bearings of the input shaft system 21 are respectively installed in the first input bearing mounting groove 111 and the second input bearing mounting groove 121. A plurality of first ribs 114 distributed radially are provided around the first input bearing mounting groove 111, and a plurality of second ribs 124 distributed radially are provided outside the second input bearing mounting groove 121, and the first ribs 114 and the second ribs 124 are arranged correspondingly. Oil grooves are formed between adjacent first ribs 114, and oil grooves are also formed between adjacent second ribs 124. When the oil flows from the bearing oil nozzle 351 into the positions of the first rib 114 and the second rib 124, the oil converges in the oil grooves and slowly flows into the input bearings for cooling, improving the cooling effect.

[0065] Further, as Figures 9 - 10 shown, a first output bearing mounting groove 112 is further provided on the inner wall of the main housing 11, and a plurality of third ribs 115 distributed radially are provided outside the first output bearing mounting groove 112;

[0066] The inner wall of the cover plate 12 is provided with a second output bearing mounting groove 122, and a plurality of fourth ribs 125 distributed radially are provided outside the second output bearing mounting groove 122.

[0067] Similarly, when the oil is stirred by the output gear 231 into the oil groove between the upper third rib 115 and the fourth rib 125, the oil converges in the oil groove and then flows from the oil groove into the output bearing, so as to continuously cool the output bearing.

[0068] Further, as Figures 8 - 10As shown, a first intermediate bearing mounting groove 113 is provided on the inner wall of the main housing 11;

[0069] On the inner wall of the cover plate 12, a second intermediate bearing mounting groove 123 is provided. Outside the second intermediate bearing mounting groove 123, a plurality of fifth ribs 126 are radially distributed. The fifth ribs 126 mainly serve to increase the structural strength of the cover plate 12 and the second intermediate bearing mounting groove 123.

[0070] Furthermore, as Figure 9 shown, below the first intermediate bearing mounting groove 113 on the inner wall of the main housing 11, a plurality of mounting positions 116 are provided for mounting the oil pump 33. There are three mounting positions 116 for fixedly connecting with the oil pump 33 through bolts or screws.

[0071] The utility model integrates two sets of reducer bodies in a reducer housing, can separately control two wheels individually, and has reasonable layout, compact structure and small occupied space.

[0072] The above are only the principles and preferred embodiments of the utility model. It should be pointed out that for those of ordinary skill in the art, based on the principle of the utility model, several other variations can also be made, which should also be regarded as the protection scope of the utility model.

Claims

1. A reducer assembly, comprising a reducer housing and a reducer body, characterized in that: The reducer housing includes a main shell and two cover plates, the two cover plates are respectively covered on the openings on opposite sides of the main shell, a first installation cavity and a second installation cavity are symmetrically arranged in the main shell, and the reducer body includes two groups, and the two groups of reducer bodies are symmetrically installed in the first installation cavity and the second installation cavity.

2. The reducer assembly according to claim 1, characterized in that: The reducer body comprises an input shaft system, an intermediate shaft system and an output shaft system. The input shaft system is used to connect with the motor, and the output shaft system is used to connect with the wheel shaft.

3. The reducer assembly according to claim 2, characterized in that: The input shaft system includes an input gear, the intermediate shaft system includes an intermediate large gear and an intermediate small gear, the intermediate large gear and the intermediate small gear are coaxially fixedly connected, the input gear is meshed with the intermediate large gear, and the output shaft system includes an output gear, and the output gear is meshed with the intermediate small gear.

4. The reducer assembly according to claim 3, characterized in that: It also includes an oil injection assembly, which is installed in the first installation cavity and the second installation cavity, and is used to transport the oil at the bottom of the first installation cavity and the second installation cavity to the intermediate shaft system and the input shaft system.

5. The reducer assembly according to claim 4, characterized in that: The oil injection assembly includes a collecting tank, a driving gear, an oil pump, a delivery pipeline and an oil nozzle. The collecting tank is located at the bottom of the first mounting cavity and the second mounting cavity. The driving gear is meshed with the output gear. The driving gear is transmission-connected to the oil pump. The delivery pipeline connects the collecting tank, the oil pump and the oil nozzle.

6. The reducer assembly according to claim 5, characterized in that: The oil nozzles include bearing oil nozzles and gear oil nozzles; The bearing oil nozzle is arranged along the axial direction, the middle section of the bearing oil nozzle is directly connected to the delivery pipeline, and both ends of the bearing oil nozzle extend above the input bearing of the input shaft system respectively; The gear oil nozzle is perpendicular to the bearing oil nozzle and extends from the middle section of the bearing oil nozzle, and the gear oil nozzle extends above the middle large gear.

7. The reducer assembly according to claim 6, characterized in that: A first input bearing installation groove is provided on the inner wall of the main housing, and a plurality of radially distributed first ribs are provided outside the first input bearing installation groove; The inner wall of the cover plate is provided with a second input bearing installation groove, and the outer side of the second input bearing installation groove is provided with a plurality of radially distributed second ribs; Two ends of the bearing oil nozzle extend into the first convex rib and the second convex rib respectively.

8. The reducer assembly according to claim 7, characterized in that: A first output bearing installation groove is also provided on the inner wall of the main housing, and a plurality of third convex ribs distributed radially are provided outside the first output bearing installation groove; The inner wall of the cover plate is provided with a second output bearing installation groove, and the outer side of the second output bearing installation groove is provided with a plurality of fourth ribs distributed in a radial pattern.

9. The reducer assembly according to claim 7, characterized in that: A first intermediate bearing mounting groove is provided on the inner wall of the main housing; The inner wall of the cover plate is provided with a second intermediate bearing installation groove, and the outer side of the second intermediate bearing installation groove is provided with a plurality of fifth ribs distributed in a radial shape.

10. The reducer assembly according to claim 9, characterized in that: A plurality of mounting positions are provided below the first intermediate bearing mounting groove on the inner wall of the main housing, and the mounting positions are used to mount the oil pump.

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