WO2020187212A1

WO2020187212A1 - Dual-motor pure electric reducer assembly

Info

Publication number: WO2020187212A1
Application number: PCT/CN2020/079811
Authority: WO
Inventors: 雷兰燕; 邓利刚; 李贵庭; 高秀琴
Original assignee: 赣州经纬科技股份有限公司
Priority date: 2019-03-19
Filing date: 2020-03-18
Publication date: 2020-09-24
Also published as: CN109798343A

Abstract

Disclosed is a dual-motor pure electric reducer assembly. The assembly comprises: a left casing (1); a right casing (3); a connecting plate (2) installed between the middle portions of the left casing (1) and the right casing (3); a first input shaft assembly (4) installed between the left casing (1) and the connecting plate (2); a second input shaft assembly (5) installed between the right casing (3) and the connecting plate (2); an intermediate shaft assembly (6) installed at the lower ends of the first input shaft assembly (4) and the second input shaft assembly (5); and a differential assembly (7) installed at the lower end of the intermediate shaft assembly (6). The present invention solves the problem of insufficient power provided a single motor. Two input shafts bear input loads simultaneously so as to reduce the strength requirements for related parts on the input shafts, and reduce the manufacturing difficulty and production cost. At the same time, dual motor drive is used to avoid the problem that the whole vehicle cannot run due to malfunction of a single motor or partial transmission structure. The assembly has simple structure and stable properties.

Description

A dual-motor pure electric reducer assembly

Technical field

The invention relates to the technical field of reducers, in particular to a dual-motor pure electric reducer assembly.

Background technique

The reducer is an independent component composed of gear transmission, worm transmission, and gear-worm transmission enclosed in a rigid shell. It is often used as a reduction transmission device between the original moving part and the working machine. It plays the role of matching the speed and transmitting torque between the prime mover and the working machine or the actuator. It is widely used in modern machinery.

With the development of electric vehicle technology and products, due to the increasing requirements of users for vehicle power, as well as vehicle requirements for miniaturization and high speed of the motor, the existing electric reducer structure can no longer meet the demand. Especially in electric logistics vehicles, buses and other models, the existing single-motor input is difficult to meet the power demand. At the same time, increasing the input torque of the motor will increase the strength requirements for the internal gears and bearings of the reducer, increasing the difficulty of manufacturing And production costs. In view of the above situation, invented a dual-input shaft pure electric reducer assembly with high reliability and strong practicability.

technical problem

The purpose of the present invention is to provide a dual-motor pure electric reducer assembly to solve the problems raised in the background art.

Technical solutions

In order to achieve the above objectives, the present invention provides the following technical solutions:

A dual-motor pure electric reducer assembly, comprising a left shell and a right shell, a connecting plate is installed between the middle of the left shell and the right shell, and a first input is installed between the left shell and the connecting plate The shaft assembly, the second input shaft assembly is installed between the right housing and the connecting plate, the lower end of the first input shaft assembly and the second input shaft assembly are installed with an intermediate shaft assembly, the lower end of the intermediate shaft assembly is installed with a difference Speed gear assembly.

As a further solution of the present invention: the first input shaft assembly and the second input shaft assembly each include an input shaft, one end of the input shaft is installed with a first ball bearing, and the other end is installed with a second ball bearing, the input shaft The input driving gear is installed in the middle.

As a further solution of the present invention, the first input shaft assembly and the second input shaft assembly are respectively connected with a power motor through splines provided on the input shaft.

As a further solution of the present invention: the intermediate shaft assembly includes an intermediate shaft, and both ends of the intermediate shaft are respectively fixed on the left and right housings by a first cone bearing and a second cone bearing.

As a further solution of the present invention, a first low-speed gear is installed at one end of the intermediate shaft, a second low-speed gear is installed at the other end, and an intermediate driving tooth is installed in the middle of the intermediate shaft.

As a further solution of the present invention: the differential assembly includes a differential housing, and the middle of the differential housing is connected with a main reduction driven gear through a rivet.

As a further solution of the present invention: the two ends of the differential housing are respectively fixed on the left and right housings through the first differential cone bearing and the second differential cone bearing.

As a further solution of the present invention: the input driving gear meshes with the first low-speed gear and the second low-speed gear.

As a further solution of the present invention: the intermediate driving gear and the main reduction driven gear mesh with each other

Beneficial effect

The dual-motor pure electric reducer assembly has reasonable structure and novel design. The dual-input shaft structure connects two motors to work at the same time, which solves the problem of insufficient power of a single motor; the two input shafts can also bear the input load at the same time The strength requirements of related parts on the input shaft are reduced, and the manufacturing difficulty and production cost are reduced; at the same time, due to the dual-motor drive, the problem of the failure of a single motor or part of the transmission structure and the failure of the entire vehicle to travel can be avoided. The invention has simple structure and stable performance.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a dual-motor pure electric reducer assembly.

Figure 2 is a schematic diagram of the structure of the first input shaft assembly in a dual-motor pure electric reducer assembly.

Figure 3 is a structural schematic diagram of the intermediate shaft assembly in a dual-motor pure electric reducer assembly.

Figure 4 is a structural schematic diagram of the differential assembly in a dual-motor pure electric reducer assembly.

In the picture: 1-left housing, 2-connecting plate, 3-right housing, 4-first input shaft assembly, 5-second input shaft assembly, 6-intermediate shaft assembly, 7-differential Assembly, 41-first ball bearing, 42-input shaft, 421-input driving gear, 422-spline, 43-second ball bearing, 61-first taper bearing, 62-first low speed gear, 63-intermediate Shaft, 631-intermediate driving gear, 64-second low-speed gear, 65-second cone bearing, 71-first differential cone bearing, 72-main reduction driven gear, 73-rivet, 74-differential housing Body, 75-cone bearing of the second differential.

The best mode of the invention

It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the invention The description is simplified, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

Example 1

Referring to Figure 1, in the embodiment of the present invention, a dual-motor pure electric reducer assembly includes a left housing 1 and a right housing 3, and a connecting plate is installed between the middle of the left housing 1 and the right housing 3 2. A first input shaft assembly 4 is installed between the left housing 1 and the connecting plate 2, a second input shaft assembly 5 is installed between the right housing 3 and the connecting plate 2, and the first input shaft assembly 4 and An intermediate shaft assembly 6 is installed at the lower end of the second input shaft assembly 5, and a differential assembly 7 is installed at the lower end of the intermediate shaft assembly 6.

Referring to Figure 2, the first input shaft assembly 4 and the second input shaft assembly 5 respectively include an input shaft 42, a first ball bearing 41 is mounted on one end of the input shaft 42, and a second ball bearing 43 is mounted on the other end. An input driving tooth 421 is installed in the middle of the input shaft 42.

Referring to Figure 3, the intermediate shaft assembly 6 includes an intermediate shaft 63. The two ends of the intermediate shaft 63 are fixed to the left housing 1 and the right housing 3 through a first cone bearing 61 and a second cone bearing 65, respectively. A first low-speed gear 62 is installed at one end of the shaft 63, a second low-speed gear 64 is installed at the other end, and an intermediate driving tooth 631 is installed in the middle of the intermediate shaft 63.

4, the differential assembly 7 includes a differential housing 74, the middle of the differential housing 74 is connected to the main reduction driven gear 72 through a rivet 73, the differential housing 74 two The ends are fixed to the left housing 1 and the right housing 3 through the first differential cone bearing 71 and the second differential cone bearing 75 respectively.

The input driving teeth 421 mesh with the first low-speed gear 62 and the second low-speed gear 64, and the intermediate driving teeth 631 mesh with the main reduction driven gear 72.

Example 2

In another embodiment of the present invention, the difference between this embodiment and the above-mentioned embodiment is that the first input shaft assembly 4 and the second input shaft assembly 5 respectively pass through splines provided on the input shaft 42 422 is connected with a power motor.

The working principle of the present invention is: a dual input shaft structure is adopted, and the input parts at both ends respectively bear the output load of the motor. When the output torque is the same, the gear and bearing strength requirements on the input shaft 42 are better guaranteed, and the cost can be appropriately reduced. When one end of the motor or transmission structure fails, the vehicle can be guaranteed to run normally. The structural assembly has high bearing strength and good reliability, and is suitable for matching various passenger cars, logistics vehicles, and passenger cars.

The above descriptions are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

Claims

A dual-motor pure electric reducer assembly, comprising a left shell (1) and a right shell (3), a connecting plate (2) is installed between the middle of the left shell (1) and the right shell (3) , Characterized in that the first input shaft assembly (4) is installed between the left housing (1) and the connecting plate (2), and the second input shaft is installed between the right housing (3) and the connecting plate (2) The shaft assembly (5), the first input shaft assembly (4) and the second input shaft assembly (5) are equipped with an intermediate shaft assembly (6) at the lower end, and a differential is installed at the lower end of the intermediate shaft assembly (6) Assembly (7).
The dual-motor pure electric reducer assembly according to claim 1, wherein the first input shaft assembly (4) and the second input shaft assembly (5) respectively comprise an input shaft (42) A first ball bearing (41) is installed at one end of the input shaft (42), a second ball bearing (43) is installed at the other end, and an input driving tooth (421) is installed in the middle of the input shaft (42).
The dual-motor pure electric reducer assembly according to claim 2, wherein the first input shaft assembly (4) and the second input shaft assembly (5) respectively pass through the input shaft (42) The spline (422) set above is connected with a power motor.
The dual-motor pure electric reducer assembly according to claim 2, wherein the intermediate shaft assembly (6) includes an intermediate shaft (63), and both ends of the intermediate shaft (63) pass through the first The tapered bearing (61) and the second tapered bearing (65) are fixed to

On the left shell (1) and the right shell (3).
The dual-motor pure electric reducer assembly according to claim 4, wherein a first low-speed gear (62) is installed at one end of the intermediate shaft (63), and a second low-speed gear (64) is installed at the other end. ), an intermediate driving tooth (631) is installed in the middle of the intermediate shaft (63).
The dual-motor pure electric reducer assembly according to claim 5, wherein the differential assembly (7) includes a differential housing (74), and the differential housing ( 74) The main reduction driven gear (72) is connected to the middle part through rivets (73).
The dual-motor pure electric reducer assembly according to claim 6, characterized in that the two ends of the differential housing (74) respectively pass through a first differential cone bearing (71) and a second differential Speed gear cone bearings (75) are fixed on the left casing (1) and the right casing (3).
The dual-motor pure electric reducer assembly according to claim 5, characterized in that the input driving gear (421) meshes with the first low-speed gear (62) and the second low-speed gear (64).
The dual-motor pure electric reducer assembly according to claim 6, wherein the intermediate driving gear (631) and the main reduction driven gear (72) mesh with each other.