WO2015039611A1

WO2015039611A1 - Coaxial motor variable torque differential assembly

Info

Publication number: WO2015039611A1
Application number: PCT/CN2014/086818
Authority: WO
Inventors: 陈哲; 王建东
Original assignee: 格源动力有限公司
Priority date: 2013-09-22
Filing date: 2014-09-18
Publication date: 2015-03-26
Also published as: DE112014004342T5; DE112014004342B4

Abstract

A coaxial motor variable torque differential assembly comprising a motor subassembly (1), a torque converter subassembly (2), and a differential subassembly (3). The motor subassembly (1) comprises a motor housing (1a), a motor rear end cover (1c) and a motor front end cover (1d) that respectively are arranged at either end of the motor housing (1a), and a rotor shaft (1b) that is movably arranged on the motor rear end cover (1c) and on the motor front end cover (1d). The rotor shaft (1b) is a hollow structure. The torque converter subassembly (2) comprises a torque converter housing (2a), a gear-shifting mechanism (2b), and a torque converter end cover (2c) arranged at the front end of the torque converter housing (2a). The rear end of the torque converter housing (2a) is arranged on the motor front end cover (1d). The front end of the rotor shaft (1b) is transmissively connected to an input end of the gear-shifting mechanism (2b) via a transmission mechanism (4). An output end of the gear-shifting mechanism (2b) is fixed onto a housing of the differential subassembly (3). Output end B of the differential subassembly (3) is arranged on the torque converter end cover (2c). Output end A and output end B of the differential subassembly (3) are coaxially arranged with the rotor shaft (1b). The coaxial motor variable torque differential assembly has a small chassis footprint and a great balance and is applicable in a vehicle.

Description

Coaxial motor variable moment differential assembly

Technical field

The present invention relates to a vehicle drive assembly, and more particularly to a coaxial motor torque differential assembly.

Background technique

With the rapid development of society, people have more and more functional requirements for electric vehicles, and the space requirements are getting larger and the performance requirements are getting higher and higher. At present, the driving forms of general electric vehicles are mainly divided into two types:

One is to drive the transmission box through the motor, and then the transmission box is connected to the driving raft to carry out the walking operation. This driving form has a large space occupied by the chassis, which is not conducive to the problem of the vehicle power battery arrangement; at the same time, it is relatively reduced. The duty cycle of the power battery, so that the cruising range of the electric vehicle is shortened, which directly leads to the economical decline of the electric vehicle and the limited use environment;

The other is through the motor directly connected to the transmission box, and then the transmission box is connected to drive the 挢 to carry out the walking operation. Because the driving form is to install the motor and the transmission box on the transaxle housing, the structure has many connection parts and the suspension is installed. The complexity is complicated, the process cost is high; and, because the vehicle is bumping up and down, the motor and the transmission box will swing up and down around the drive axle, resulting in poor balance of the whole vehicle.

Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the deficiencies of the above background art and to provide a coaxial motor torque differential assembly having a small footprint and a good balance.

In order to achieve the above object, the present invention provides a coaxial motor torque differential assembly, comprising a motor sub-assembly, a torque converter sub-assembly and a differential sub-assembly, wherein the motor sub-assembly comprises electric a motor housing, a motor rear end cover and a motor front end cover respectively mounted at two ends of the motor housing, and a rotor shaft movably mounted on the motor rear end cover and the motor front end cover, the rotor shaft being a hollow structure; The torque converter subassembly includes a torque converter housing, a shifting mechanism, and a torque converter end cover mounted at a front end of the torque converter housing, the rear end of the torque converter housing being mounted at the front end of the motor Covered, the front end of the rotor shaft is drivingly connected to the input end of the shifting mechanism via a transmission mechanism, and an output end of the shifting mechanism is fixed on a housing of the differential sub-assembly, the differential The output B end of the assembly is mounted on the torque converter end cap, and the output A end and the output B end of the differential subassembly are coaxially disposed with the rotor shaft. Through the rotor shaft The power of the motor sub-assembly is transmitted to the differential sub-assembly via a shifting torque of the shifting mechanism, and the power transmitted to the differential sub-assembly is divided from the differential sub-assembly Output B terminal output, on the other hand, output from the output A end of the differential subassembly, and can be connected to the output A end of the differential subassembly at the rotor shaft of the hollow structure The drive shaft outputs power from the rear end of the motor sub-assembly. Since the output A end of the differential sub-assembly is coaxially arranged with the rotor shaft, the output B end of the differential sub-assembly is The output power and the power output from the rear end of the motor sub-assembly are also coaxial, thereby realizing that the power of the motor sub-assembly is coaxially output from both ends of the assembly, and the balance is good; The shifting mechanism and the differential sub-assembly are integrated in the torque converter housing and mounted on the front end cover of the motor, so that the structure is compact and the chassis takes up a small space.

In the above aspect, the transmission mechanism includes an input gear fixedly mounted at a front end of the rotor shaft and a first countershaft gear movably mounted on the front end cover of the motor; the shifting mechanism includes a first shifting gear, and an active mounting a second counter gear and a second shifting gear on the torque converter housing, the first shifting gear is an inner and outer double-toothed structure, and the second shifting gear is an inner-toothed disc-shaped structure, One end of a shifting gear is movably mounted at an end of the front end of the rotor shaft, and the other end of the first shifting gear is movably mounted at an output A end of the differential sub-assembly, the second shifting gear a disk side portion fixedly mounted on a housing of the differential subassembly; the input gear is drivingly coupled to an inner ring gear of the first shifting gear via the first countershaft gear, the first shifting An outer ring gear of the gear is drivingly coupled to the second shifting gear via the second countershaft gear. Of course, the shifting mechanism can also be a first-stage shifting mechanism or a three-speed shifting mechanism, etc., and the specific variable speed torque level can be designed according to actual needs.

In the above aspect, one end of the first shifting gear is mounted at the end of the front end of the rotor shaft by a coaxial positioning bearing, and the other end of the first shifting gear is mounted through a differential coaxial suspension bearing. The differential is divided into the output A end of the assembly. Thus, the shaft hole of the first shifting gear functions to position the output A end of the differential sub-assembly, ensuring that the output A end of the differential sub-assembly is coaxial with the rotor shaft. degree.

In the above solution, a spacer sleeve and a retaining ring are disposed between the coaxial positioning bearing and the differential coaxial suspension bearing, and the retaining ring is positioned and installed in a shaft hole of the first shifting gear, A spacer is mounted on one side of the retaining ring. The spacer and the retaining ring function to position the coaxial positioning bearing and the differential coaxial suspension bearing. Of course, other configurations of the positioning mechanism can also be employed.

In the above aspect, the first countershaft gear is at least one, and the second countershaft gear is at least one. The number of the first countershaft gear and the second countershaft gear may be designed according to factors such as the magnitude of the transmitted torque, the speed of the transmission, and the smoothness of the force transmission.

In the above aspect, the first countershaft gear is a double-toothed structure, one end of the first countershaft gear is constantly meshed with the input gear, and the other end of the first countershaft gear is opposite to the first The inner ring gear of the shifting gear is often meshed. The reduction ratio is increased by the first countershaft gear of the double-tooth structure, thereby improving the torque-changing effect. Of course, the first countershaft gear may also be a single-tooth structure, and correspondingly, the second countershaft gear may also be a double-toothed structure.

In the above solution, a coaxial coaxial transmission shaft is disposed in the rotor shaft, and one end of the coaxial transmission shaft is fixedly inserted into the output A end of the differential sub-assembly, the coaxial The other end of the drive shaft is movably mounted on the rear end cover of the motor and extends outward. By adding a coaxially arranged coaxial drive shaft in the rotor shaft of the hollow structure, the power of the output A end of the differential sub-assembly is outputted from the rear end of the motor sub-assembly, thereby The power of the motor sub-assembly is coaxially outputted from both ends of the assembly, and the balance is good, and the power of the output A end of the differential sub-assembly is not required to be additionally provided.

In the above solution, the extending end of the coaxial transmission shaft is fixedly fitted with a transmission sleeve, and the transmission sleeve is movably mounted on the rear end cover of the motor. In this way, power can be transmitted directly through the drive sleeve without the need for an additional power take-off mechanism.

In the above solution, the inner and outer connecting surfaces of the motor rear end cover, the motor front end cover and the torque converter end cover are respectively provided with a joint opening of a built-in static sealing assembly. Of course, other sealing structures can also be used.

In the above solution, the connection between the rotor shaft and the motor rear end cover and the motor front end cover is respectively provided with a rotary seal assembly. Of course, other sealing components can also be used.

The advantages of the invention are:

1. The power of the motor sub-assembly is transmitted to the differential sub-assembly through the rotor shaft through the rotor shaft, and the power transmitted to the differential sub-assembly is from the difference. The output B end of the speed sub-assembly is outputted, and on the other hand, is outputted from the output A end of the differential sub-assembly, and can be mounted on the rotor shaft of the hollow structure and the differential sub-assembly The drive shaft connected to the output A end outputs power from the rear end of the motor sub-assembly, and since the output A end of the differential sub-assembly is coaxially arranged with the rotor shaft, the differential is divided from the differential The power output from the output B of the assembly and the power output from the rear end of the motor sub-assembly are also coaxial, thereby realizing the coaxial output of the motor sub-assembly from the two ends of the assembly, and the balance is good. ;

2. Since the shifting mechanism and the differential sub-assembly are integrated in the torque converter housing and mounted on the front end cover of the motor, the structure is compact and the chassis takes up a small space;

3. The shaft hole of the first shifting gear functions to position the output A end of the differential sub-assembly to ensure that the output A end of the differential sub-assembly is coaxial with the rotor shaft degree;

4. The number of the first countershaft gear and the second countershaft gear are respectively three and uniformly arranged in the circumferential direction, so that the power transmission is more stable;

5. By adding a coaxially arranged coaxial drive shaft in the rotor shaft of the hollow structure, the power output from the output A end of the differential sub-assembly is output from the rear end of the motor sub-assembly. Therefore, the power of the motor sub-assembly is coaxially outputted from both ends of the assembly, and the balance is good, and the power of the output A end of the differential sub-assembly is not required to be additionally provided.

The working process of the present invention is as follows:

First, the power of the motor sub-assembly is transmitted from the rotor shaft to the first countershaft gear via an input gear; then, the power is again transmitted by the first countershaft gear to the first shifting gear to On the second countershaft gear; then, power is again transmitted by the second countershaft gear to the differential subassembly via the second shifting gear; finally, power is on the one hand from the differential The output B end of the sub-assembly is directly output, and on the other hand, the output A end of the differential sub-assembly is output via the coaxial transmission shaft.

Compared with the prior art, the invention fully demonstrates that the superiority lies in that, on the one hand, since the power transmission of the motor sub-assembly, the torque converter sub-assembly and the differential sub-assembly are all on the same axis, The balance of the assembly is good; on the other hand, since the shifting mechanism and the differential sub-assembly are integrated in the torque converter housing, and are mounted on the front end cover of the motor, and the power is directly from the total The two ends are output, so the structure is compact, which is convenient for the chassis layout of the whole vehicle and the space occupied by the chassis is small.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

2 is a schematic view showing an assembly structure of the present invention;

Fig. 3 is a schematic view showing another assembly structure of the present invention.

In the figure: motor sub-assembly 1, motor housing 1a, rotor shaft 1b, motor rear end cover 1c, motor front end cover 1d, joint stop 1e, rotary seal assembly 1f, torque converter sub-assembly 2, change The torque housing 2a, the shifting mechanism 2b, the first shifting gear 2b1, the second countershaft gear 2b2, the second shifting gear 2b3, the coaxial positioning bearing 2b4, the differential coaxial suspension bearing 2b5, the spacer 2b6, the block Ring 2b7, torque converter end cover 2c, differential sub-assembly 3, transmission mechanism 4, transmission Into gear 4a, first countershaft gear 4b, coaxial drive shaft 5, transmission sleeve 5a, outer bridge housing 6, outer joint 6a, shaft tube 7, outer brake hub sub-assembly 8, half shaft 8a, The external transmission protective casing 9, the external brake hub sub-assembly 10, the constant-speed transmission shaft 10a, and the suspension sub-assembly 11.

detailed description

The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

The embodiment provides a coaxial motor torque differential assembly, comprising a motor sub-assembly 1, a torque converter sub-assembly 2 and a differential sub-assembly 3, wherein the motor sub-assembly 1 includes electricity a machine housing 1a, a motor rear end cover 1c and a motor front end cover 1d respectively mounted at both ends of the motor housing 1a, and a rotor shaft 1b movably mounted on the motor rear end cover 1c and the motor front end cover 1d, The rotor shaft 1b is a hollow structure; the torque converter sub-assembly 2 includes a torque converter housing 2a, a shifting mechanism 2b mounted in the torque converter housing 2a, and a housing of the torque converter mounted a torque converter end cover 2c at the front end of the 2a, the rear end of the torque converter housing 2a is mounted on the motor front end cover 1d, and the differential subassembly 3 is mounted in the torque converter housing 2a The front end of the rotor shaft 1b is drivingly connected to the input end of the shifting mechanism 2b via a transmission mechanism 4, and the output end of the shifting mechanism 2b is fixed to the housing of the differential sub-assembly 3, the difference The output B end of the speed sub-assembly 3 is mounted on the torque converter end cover 2c, and the output A end and the output B end of the differential sub-assembly 3 are coaxial with the rotor shaft 1b. Arrangement. The power of the motor sub-assembly 1 is transmitted through the rotor shaft 1b to the differential sub-assembly 3 via the shifting mechanism 2b, and the power transmitted to the differential sub-assembly 3 is The output B end of the differential sub-assembly 3 is directly output, and on the other hand, is output from the output A end of the differential sub-assembly 3, and can be mounted on the rotor shaft 1b of the hollow structure. The drive shaft connected to the output A end of the differential sub-assembly 3 outputs power from the rear end of the motor sub-assembly 1, since the output A end of the differential sub-assembly 3 is the same as the rotor shaft 1b The shaft is arranged so that the power output from the output B terminal of the differential sub-assembly 3 and the power output from the rear end of the motor sub-assembly 1 are also coaxial, thereby realizing the power to divide the motor into a total of 1. Coaxial output from both ends of the assembly, the balance is good; and, since the shifting mechanism 2b and the differential sub-assembly 3 are integrated in the torque converter housing 2a, and installed at the front end of the motor The cover 1d is so compact that the chassis takes up less space.

The transmission mechanism 4 includes an input gear 4a fixedly mounted at a front end of the rotor shaft 1b and a first countershaft gear 4b movably mounted on the motor front end cover 1d; the shifting mechanism 2b includes a first shifting gear 2b1, and an active a second counter gear 2b2 and a second shift gear 2b3 mounted on the torque converter housing 2a, specifically The second countershaft gear 2b2 is mounted on the torque converter housing 2a by a cylindrical positioning pin, the first shifting gear 2b1 being an inner and outer double-toothed structure, and the second shifting gear 2b3 being an inner-toothed disc a structure, one end of the first shifting gear 2b1 is movably mounted at a tip end of the front end of the rotor shaft 1b, and the other end of the first shifting gear 2b1 is movably mounted at an output A of the differential sub-assembly 3 End, the disk side portion of the second shifting gear 2b3 is fixedly mounted on the housing of the differential sub-assembly 3 by a double screw, and the differential sub-assembly 3 passes through the second shifting gear 2b3 And a torque converter end cover 2c is mounted in the torque converter housing 2a; the input gear 4a is drivingly coupled to an inner ring gear of the first shift gear 2b1 via the first counter gear 4b, The outer ring gear of the first shifting gear 2b1 is drivingly coupled to the second shifting gear 2b3 via the second countershaft gear 2b2. Of course, the shifting mechanism 2b can also be a first-stage shifting mechanism or a three-speed shifting mechanism, etc., and the specific shifting torque level can be designed according to actual needs.

One end of the first shift gear 2b1 is mounted at a tip end of the front end of the rotor shaft 1b via a coaxial positioning bearing 2b4, and the coaxial positioning bearing 2b4 abuts against an end surface of the input gear 4a, the first shifting gear The other end of 2b1 is mounted on the output A end of the differential subassembly 3 via a differential coaxial suspension bearing 2b5. Thus, the shaft hole of the first shifting gear 2b1 functions to position the output A end of the differential sub-assembly 3, ensuring the output A end of the differential sub-assembly 3 and the rotor shaft. 1b coaxiality.

A spacer 2b6 and a retaining ring 2b7 are disposed between the coaxial positioning bearing 2b4 and the differential coaxial suspension bearing 2b5, and the retaining ring 2b7 is positioned and mounted in the shaft hole of the first shifting gear 2b1, The spacer 2b6 is mounted on one side of the retaining ring 2b7. The spacer 2b6 and the retaining ring 2b7 function to position the coaxial positioning bearing 2b4 and the differential coaxial suspension bearing 2b5. Of course, other configurations of the positioning mechanism can also be employed.

The first counter gear 4b is at least one and the second counter gear 2b2 is at least one. The number of the first countershaft gear 4b and the second countershaft gear 2b2 can be designed according to factors such as the magnitude of the transmitted torque, the speed of the transmission, and the smoothness of the force transmission.

The first countershaft gear 4b is a double-toothed structure, one end of the first countershaft gear 4b is constantly meshed with the input gear 4a, and the other end of the first countershaft gear 4b is coupled to the first shifting gear. The inner ring gear of 2b1 is always meshed. The reduction ratio is increased by the first countershaft gear 4b having the double-tooth structure, thereby improving the torque-changing effect. Of course, the first countershaft gear 4b can also be a single-tooth structure, and correspondingly, the second countershaft gear 2b can also be a double-toothed structure.

A coaxial coaxial transmission shaft 5 is disposed in the rotor shaft 1b, and one end of the coaxial transmission shaft 5 is inserted into the output A end of the differential sub-assembly 3 by a spline, the coaxial The other end of the drive shaft 5 is movably mounted on the motor The rear end cover 1c extends upward and outward. By adding a coaxially arranged coaxial drive shaft 5 in the rotor shaft 1b of the hollow structure, the power of the output A end of the differential sub-assembly 3 is divided from the motor sub-assembly 1 The end output is such that the power of the motor sub-assembly 1 is coaxially output from both ends of the assembly, and the balance is good and the power of the output A end of the differential sub-assembly 3 is extracted without additionally providing a transmission shaft. In order to reduce the influence of the electromagnetic field of the motor sub-assembly 1 on the high-speed rotation of the coaxial transmission shaft 5, the coaxial transmission shaft 5 may be manufactured using a magnetic permeability material.

The extended end of the coaxial transmission shaft 5 is provided with a transmission sleeve 5a through a spline, and the transmission sleeve 5a is movably mounted on the motor rear end cover 1c. In this way, the power can be transmitted directly through the drive sleeve 5a without the need for an additional power take-off mechanism.

The inner and outer connecting faces of the motor rear end cover 1c, the motor front end cover 1d, and the torque converter end cover 2c are respectively provided with a fitting stopper 1e having a built-in static seal assembly. Of course, other sealing structures can also be used. A rotary seal assembly 1f is respectively disposed at a joint between the rotor shaft 1b and the motor rear end cover 1c and the motor front end cover 1d. Of course, other sealing components can also be used.

In actual use, the assembly needs to cooperate with the combined structure of the shaft tube and the outer bridge shell with the external brake hub or the combined structure of the external brake hub and the constant speed drive shaft to form the drive axle. The specific structure of the combined structure of the shaft tube and the outer bridge shell with the outer brake hub and the combined structure of the outer brake hub and the constant speed drive shaft is as follows:

The combined structure of the above-mentioned shaft tube and the outer bridge housing with the outer brake hub includes an outer bridge housing 6, a shaft tube 7 and an outer brake hub sub-assembly 8 with a half shaft 8a, the diameter of the shaft tube 7 and The diameter of the connecting port of the outer brake hub sub-assembly 8 with the half shaft 8a is matched, and one end of the shaft tube 7 is fixedly connected with the outer brake hub sub-assembly 8, the other end of the shaft tube 7 is One end of the outer bridge housing 6 is fixedly connected, and the other end of the outer bridge housing 6 is provided with an outer joint 6a for connection mounting, and the other end of the outer bridge housing 6 is mounted on the motor rear end cover 1c or / and the torque converter end cover 2c.

The outer bridge housing 6 is a flared structure, and the small end of the outer bridge housing 6 of the flared structure is welded to the shaft tube 7, and the large end of the outer bridge housing 6 of the flared structure is The motor rear end cover 1c or/and the torque converter end cover 2c are connected, and the outer joint port 6a is disposed at the large end of the outer bridge housing 6 of the flared structure.

In the specific assembly, the half shaft 8a of the combined structure of the shaft tube with the outer brake hub and the outer bridge housing is first inserted into the transmission sleeve 5a, and then the outer bridge housing 6 is installed by bolts. The motor rear end cover 1c or/and the torque converter end cover 2c may be used.

The combined structure of the above-mentioned external brake hub and constant speed transmission shaft includes an external transmission protection shell 9 and a constant speed transmission The outer brake hub of the shaft 10a is divided into a sub-assembly 10, and a dust cover at the connection port of the outer brake hub sub-assembly 10 is fitted at one end of the outer transmission protective casing 9, and the outer transmission protective casing 9 The other end is provided with an outer joint 6a for connection mounting, and the other end of the outer transmission shield 9 is mounted on the motor rear end cover 1c or/and the torque converter end cover 2c.

The outer transmission protection casing 9 is a horn-like structure, and the small end of the external transmission protection casing 9 of the horn structure is connected to the external brake hub sub-assembly 10, and the external transmission of the horn structure The large end of the protective casing 9 is connected to the motor rear end cover 1c or/and the torque converter end cover 2c, and the outer joint 6a is disposed at the large end of the outer transmission shield 9 of the flared structure. end.

In the specific assembly, the constant speed transmission shaft 10a of the combined structure of the shaft tube with the outer brake hub and the outer bridge housing is first inserted into the transmission sleeve 5a, and then the outer bridge housing 6 is bolted. It is sufficient to be mounted on the motor rear end cover 1c or/and the torque converter end cover 2c. Of course, the outer brake hub sub-assembly 10 also requires the suspension sub-assembly 11 to be positioned.

The present invention transmits the power of the motor sub-assembly 1 through the rotor shaft 1b to the differential sub-assembly 3 via the shifting mechanism 2b, and transmits the power to the differential sub-assembly 3 The aspect is output from the output B end of the differential sub-assembly 3, and on the other hand, from the output A end of the differential sub-assembly 3, and can be mounted and mounted on the rotor shaft 1b of the hollow structure. The drive shaft connected to the output A end of the differential sub-assembly 3 outputs power from the rear end of the motor, since the output A end of the differential sub-assembly 3 is coaxially arranged with the rotor shaft 1b, Therefore, the power output from the output B terminal of the differential sub-assembly 3 and the power output from the rear end of the motor are also coaxial, thereby realizing the power of dividing the motor into the total assembly 1 from both ends of the assembly. Coaxial output, good balance; at the same time, since the shifting mechanism 2b and the differential sub-assembly 3 are integrated in the torque converter housing 2a and mounted on the motor front end cover 1d, the structure is compact The chassis takes up a small space; moreover, the shaft hole of the first shifting gear 2b1 serves to locate the differential sub-assembly 3 The function of the A end ensures the coaxiality of the output A end of the differential sub-assembly 3 and the rotor shaft 1b; meanwhile, the number of the first countershaft gear 4b and the second countershaft gear 2b2 are respectively It is three and evenly arranged in the circumferential direction, so that the power transmission is more stable. Finally, by adding a coaxially arranged coaxial transmission shaft 5 in the rotor shaft 1b of the hollow structure, the differential is divided. The power of the output A end of the assembly 3 is output from the rear end of the motor sub-assembly 1, so that the power of the motor sub-assembly 1 is coaxially output from both ends of the assembly, and the balance is good and no additional transmission is required. The shaft pulls out the power of the output A end of the differential subassembly 3.

The working process of the present invention is as follows:

First, the power of the motor sub-assembly 1 is transmitted from the rotor shaft 1b to the first countershaft gear 4b via the input gear 4a; then, the power is again passed by the first countershaft gear 4b. a shifting gear 2b1 is transmitted to the second countershaft gear 2b2; then, power is again transmitted by the second countershaft gear 2b2 to the differential subassembly 3 via the second shifting gear 2b3; Finally, the power is output directly from the output B end of the differential subassembly 3 on the one hand and from the output A end of the differential subassembly 3 via the coaxial drive shaft 5 on the other hand.

In one aspect of the present invention, since the power transmissions of the motor sub-assembly 1, the torque converter sub-assembly 2, and the differential sub-assembly 3 are all on the same axis, the balance of the assembly is good; Aspect, since the shifting mechanism 2b and the differential sub-assembly 3 are integrated in the torque converter housing 2a, and are mounted on the motor front end cover 1d, and the power is directly output from both ends of the assembly. Therefore, the structure is compact, and it is convenient for the chassis layout of the whole vehicle and the space occupied by the chassis is small.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

A coaxial motor torque differential assembly includes a motor sub-assembly (1), a torque converter sub-assembly (2) and a differential sub-assembly (3), and the motor sub-assembly (1) a motor housing (1a), a motor rear end cover (1c) and a motor front end cover (1d) respectively mounted at both ends of the motor housing (1a), and a movable rear end cover (1c) And a rotor shaft (1b) on the motor front end cover (1d), characterized in that the rotor shaft (1b) is a hollow structure; the torque converter sub-assembly (2) comprises a torque converter housing (2a) a shifting mechanism (2b) and a torque converter end cover (2c) mounted at a front end of the torque converter housing (2a), the rear end of the torque converter housing (2a) being mounted on the front end cover of the motor (1d), the front end of the rotor shaft (1b) is drivingly coupled to an input end of the shifting mechanism (2b) via a transmission mechanism (4), and an output end of the shifting mechanism (2b) is fixed to the differential On the housing of the subassembly (3), the output B end of the differential subassembly (3) is mounted on the torque converter end cover (2c), the differential subassembly (3) The output A end of the ) is arranged coaxially with the rotor shaft (1b).
A variable speed differential assembly for a coaxial machine according to claim 1, wherein said transmission mechanism (4) includes an input gear (4a) fixedly mounted at a front end of said rotor shaft (1b) and movable mounting a first countershaft gear (4b) on the motor front end cover (1d); the shifting mechanism (2b) includes a first shifting gear (2b1) movably mounted on the torque converter housing (2a) a second counter gear (2b2) and an second shift gear (2b3), the first shift gear (2b1) is an inner and outer double gear structure, and the second shift gear (2b3) is an inner tooth disc structure. One end of the first shifting gear (2b1) is movably mounted at a tip end of the front end of the rotor shaft (1b), and the other end of the first shifting gear (2b1) is movably mounted on the differential sub-assembly At the output A end of (3), the disk side portion of the second shift gear (2b3) is fixedly mounted on the housing of the differential sub-assembly (3); the input gear (4a) passes the a first counter gear (4b) is drivingly coupled to an inner ring gear of the first shift gear (2b1), and an outer ring gear of the first shift gear (2b1) passes through the second counter gear (2b2) Said second transmission gear (2B3) drivingly connected.
A variable speed differential assembly for a coaxial machine according to claim 2, wherein: said first shifting gear One end of (2b1) is mounted at the end of the front end of the rotor shaft (1b) via a coaxial positioning bearing (2b4), and the other end of the first shifting gear (2b1) is passed through a differential coaxial suspension bearing ( 2b5) is mounted on the output A end of the differential sub-assembly (3).
A variable speed differential assembly for a coaxial machine according to claim 3, wherein a spacer is provided between said coaxial positioning bearing (2b4) and a differential coaxial suspension bearing (2b5) ( 2b6) and a retaining ring (2b7), the retaining ring (2b7) is positioned and mounted in a shaft hole of the first shifting gear (2b1), and the spacer (2b6) is mounted on the retaining ring (2b7) One side.
A variable speed differential assembly for a coaxial machine according to claim 2, wherein said first countershaft gear (4b) is at least one and said second countershaft gear (2b2) is at least one.
A variable speed differential assembly for a coaxial machine according to claim 2, wherein said first countershaft gear (4b) is a double-toothed structure, and one end of said first countershaft gear (4b) The input gear (4a) is constantly meshed with the other end of the first counter gear (4b) and the inner ring gear of the first shifting gear (2b1).
The variable speed differential assembly for a coaxial electric machine according to claim 1 or 2, wherein a coaxially disposed coaxial transmission shaft (5) is disposed in the rotor shaft (1b), the coaxial One end of the transmission shaft (5) is fixedly inserted into the output A end of the differential sub-assembly (3), and the other end of the coaxial transmission shaft (5) is movably mounted on the rear end cover (1c) of the motor Extend and extend outward.
The variable speed differential assembly for a coaxial motor according to claim 7, wherein the extension end of the coaxial transmission shaft (5) is fixedly provided with a transmission sleeve (5a), and the transmission sleeve (5a) The activity is mounted on the motor rear end cover (1c).
A variable speed differential assembly for a coaxial motor according to claim 1 or 2, wherein said motor rear end cover (1c), motor front end cover (1d) and torque converter end cover (2c) are respectively The inner and outer connecting faces are respectively provided with a joint stop (1e) with a built-in static seal assembly.
The coaxial motor torque differential assembly according to claim 1 or 2, characterized in that the rotor shaft (1b) is connected to the motor rear end cover (1c) and the motor front end cover (1d). There are respectively a rotary seal assembly (1f).