CN210536433U

CN210536433U - Variable speed transmission mechanism of side-mounted motor

Info

Publication number: CN210536433U
Application number: CN201921819142.5U
Authority: CN
Inventors: 赵玉晓; 温智晖
Original assignee: WUYANG-HONDA MOTORS (GUANGZHOU) CO LTD
Current assignee: WUYANG-HONDA MOTORS (GUANGZHOU) CO LTD
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-05-15
Anticipated expiration: 2029-10-25

Abstract

The utility model provides a variable speed transmission mechanism of side-hung motor, including decelerator and motor, decelerator includes reduction box, countershaft and output shaft, is equipped with protruding installation department on the reduction box, and countershaft and output shaft are installed in the reduction box, and both pass through gear engagement transmission, and one end of output shaft stretches out the reduction box and is connected with wheel hub outward; the motor is fixedly connected with the reduction box body, a motor shaft of the motor is supported with the reduction box body through a third bearing and a fourth bearing, and the third bearing is in interference fit with the motor shaft; install axle sleeve, drive gear and gasket on the motor shaft, axle sleeve and motor shaft interference fit install the oil blanket between axle sleeve and the reduction box, and drive gear passes through spline fit with the motor shaft, and its and countershaft meshing transmission, and the gasket is respectively with drive gear and fourth bearing butt. The utility model provides a drive gear's on the motor shaft external diameter is different, the problem of motor assembly on decelerator.

Description

Variable speed transmission mechanism of side-mounted motor

Technical Field

The utility model belongs to two-wheeled electric motor car field especially relates to a variable speed drive of side-hung motor.

Background

The double-wheel electric vehicle is a vehicle which takes a storage battery as energy and is driven to move forward through a motor and a transmission system, and compared with a bicycle, the double-wheel electric vehicle does not need manpower to pedal and saves labor; compared with internal combustion engine driven vehicles such as motorcycles and the like, the internal combustion engine driven vehicle has the advantages of low noise, no waste gas and less pollution. Therefore, as a traffic tool which is cheap and good and is convenient to use, the traffic tool is rapidly popularized among thousands of households, and becomes a travel tool for the common people to travel in short distance.

The motor of the current universal double-wheel electric vehicle is a hub motor, the hub motor, namely the motor is directly arranged in a rear wheel hub, and the driving power of the hub motor mainly changes the rotating speed of the motor to change the speed by adjusting the voltage and the current of the motor. The output power and torque of such electric vehicles are greatly limited, mainly manifested by low motor efficiency, poor climbing and acceleration dynamics. In order to solve such problems, a high-speed motor with a speed reduction device appears in the market, and the high-speed motor is installed on a hub through the speed reduction device. The reduction gear has the needs of different drive ratios, and different drive ratios will have different gear designs to the external diameter of the drive gear on the motor shaft also can be different, makes the motor difficult to assemble on reduction gear.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a variable speed drive of side-hung motor constructs, processing technology is simple, saves manufacturing cost, and the outer diameter of solving the epaxial drive gear of motor is different, the problem of motor assembly on decelerator.

The utility model discloses a realize through following technical scheme:

a variable-speed transmission mechanism of a side-hung motor comprises a speed reducer and the motor, wherein the speed reducer comprises a speed reducer box body, an auxiliary shaft and an output shaft, a protruding installation part is arranged on the outer side wall of the speed reducer box body, the auxiliary shaft is supported in the speed reducer box body through a first bearing, the output shaft is supported with the speed reducer box body through a second bearing, the output shaft and the auxiliary shaft are in meshing transmission through a gear, and one end of the output shaft extends out of the speed reducer box body and is connected with a hub;

the motor is arranged on the reduction box body, a motor shaft of the motor extends into the reduction box body, a third bearing and a fourth bearing for supporting the motor shaft are arranged between the reduction box body and the motor shaft, and the third bearing is sleeved on the motor shaft in an interference fit manner;

the motor shaft is sequentially provided with a shaft sleeve, a driving gear and a gasket at a position between the third bearing and the fourth bearing, the shaft sleeve is sleeved on the motor shaft through interference fit, an oil seal is arranged between the shaft sleeve and the reduction box body, the driving gear is sleeved on the motor shaft through spline fit, the driving gear is in meshing transmission with the auxiliary shaft, and the gasket is sleeved on the motor shaft and is respectively abutted against the driving gear and the fourth bearing.

Compared with the prior art, the beneficial effects of the utility model are that: the processing technology is simple, the third bearing and the motor shaft are combined into a whole in advance through interference fit of the third bearing and the motor shaft, so that when the motor is assembled with the speed reducer, a driving gear on the motor shaft does not need to penetrate through the third bearing, and the outer diameter of the driving gear is not limited by the diameter of an inner ring of the third bearing; meanwhile, the diameter of the motor shaft is increased through the shaft sleeve, an oil seal with a larger inner diameter can be used between the shaft sleeve and the reduction box body, and the driving gears with different outer diameters can be in transmission connection with the auxiliary shaft after passing through the oil seal, so that the problem that the driving gears on the motor shaft are different in outer diameter and the motor is assembled on the reduction device is solved; the utility model is suitable for a big reduction ratio gear drive, under the condition that the power demand of the two-wheeled electric motor car is the same, the larger the transmission ratio of the speed reducer, the smaller the peak torque of the motor, therefore the side-hung motor under the same power has smaller volume, saves the manufacturing cost, and is convenient to be installed on the wheel hub of the two-wheeled electric motor car; meanwhile, gear lubricating oil in the gearbox body is ensured not to flow into the motor through the oil seal.

Further, a sealing ring is arranged between the shaft sleeve and the motor shaft. The sealing ring prevents gear lubricating oil in the speed reducing device from flowing into the motor.

Further, be equipped with first annular groove on the motor shaft, the sealing washer sets up in first annular groove.

Furthermore, be equipped with the first installation section that the external diameter shrinks in proper order, the second installation section, third installation section and fourth installation section on the motor shaft, the third bearing is located on the first installation section through the interference fit cover, the axle sleeve passes through the interference fit cover and locates on the second installation section, drive gear passes through the spline fit cover and locates on the third installation section, wherein be equipped with the external splines on the third installation section, drive gear's inner wall is equipped with the internal splines with external splines matched with, gasket and fourth bearing all overlap and establish on the fourth installation section.

Furthermore, a second annular groove is formed in one end, close to the third mounting section, of the fourth mounting section, and the gasket is arranged in the second annular groove.

Further, install first countershaft gear and second countershaft gear on the countershaft, first countershaft gear passes through spline fit with the countershaft, and it and drive gear meshing transmission, overlaps through interference fit on the output shaft to be equipped with output gear, output gear and second countershaft gear meshing transmission.

Furthermore, the reduction box body is formed by fixedly connecting a left box body and a right box body, the motor is installed on the left box body, the left box body is also used as a motor end cover of the motor, the third bearing is arranged between the left box body and the motor shaft, the fourth bearing is arranged between the right box body and the motor shaft, and the protruding installation part is arranged on the left box body. The motor sets up with reduction box is integrative, further reduces the utility model discloses a volume.

Further, an arc-shaped installation part is further arranged on the left box body.

Further, the motor comprises a motor cover, a motor shell, a stator core, a rotor core, a motor shaft and a position sensor, two ends of the motor shell are open, one end of the motor shell is fixed on the reduction box body, the other end of the motor shell is sealed by the motor cover, a winding is wound on the stator core and fixed on the inner wall of the motor shell, the rotor core is rotatably installed in the stator core and fixedly sleeved on the motor shaft, and the position sensor is arranged on the motor cover.

Drawings

FIG. 1 is a schematic structural view of a variable speed transmission mechanism of a side-hung motor according to the present invention;

FIG. 2 is a cross-sectional view of the variable speed transmission mechanism of the side-hung motor of the present invention

Fig. 3 is an exploded view of the structure of the motor shaft, the third bearing, the sealing ring, the shaft sleeve, the driving gear and the gasket in the variable speed transmission mechanism of the side hanging motor of the present invention.

In the figure, 1-speed reduction gear, 11-speed reduction box, 111-bulge mounting, 112-left box, 113-right box, 114-arc mounting, 12-countershaft, 121-first countershaft gear, 122-second countershaft gear, 13-output shaft, 131-output gear, 14-third bearing, 15-fourth bearing, 16-oil seal, 2-motor, 21-motor shaft, 211-first mounting section, 212-second mounting section, 213-third mounting section, 214-fourth mounting section, 215-first annular groove, 216-second annular groove, 22-shaft sleeve, 23-driving gear, 24-gasket, 25-seal ring, 26-motor cover, 27-motor housing, 28-stator core, 281-winding, 29-rotor core.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a variable transmission mechanism of a side-hung motor according to the present invention. A variable-speed transmission mechanism of a side-hung motor comprises a speed reducer 1 and a motor 2, wherein the motor 2 is in transmission connection with the speed reducer 1, and the speed reducer 1 is installed on a hub of a two-wheel electric vehicle.

Referring to fig. 2, fig. 2 is a sectional view of the variable transmission mechanism of the side-hung motor according to the present invention. The speed reducer 1 comprises a speed reducer box body 11, an auxiliary shaft 12 and an output shaft 13, wherein a convex mounting part 111 is arranged on the outer side wall of the speed reducer box body 11, the auxiliary shaft 12 is supported in the speed reducer box body 11 through a first bearing, the output shaft 13 is supported with the speed reducer box body 11 through a second bearing, the output shaft 13 and the auxiliary shaft 12 are in meshing transmission through a gear, and one end of the output shaft 13 extends out of the speed reducer box body 11 and is connected with a hub of the two-wheel electric vehicle; specifically, reduction box 11 is formed by left box 112 and the 113 rigid couplings of right box, and motor 2 installs on left box 112, and left box 112 holds concurrently as motor 2's motor end cover simultaneously, and motor 2 further reduces with the integrative setting of reduction box 11 the utility model discloses a volume. A bump mounting portion 111 is provided on the left case, and the bump mounting portion 111 can be used for mounting a damping device. Specifically, the boss mounting portion 111 is provided with a first mounting hole, and the damping device may be mounted on the first mounting hole by a fastener such as a bolt. Further, an arc-shaped mounting portion 114 is provided on the left case 112. Arc installation department 114 can be used to the installation and hangs back cradle, specifically, is equipped with a plurality of second mounting holes on the arc installation department 114, hangs back cradle and can install on a plurality of second mounting holes through fasteners such as bolts.

Referring to fig. 3, fig. 3 is an exploded view of a motor shaft, a third bearing, a sealing ring, a shaft sleeve, a driving gear and a gasket of the variable transmission mechanism of the side hanging motor according to the present invention. The motor 2 is arranged on the reduction box body 11, a motor shaft 21 of the motor 2 extends into the reduction box body 11, a third bearing 14 and a fourth bearing 15 for supporting the motor shaft 21 are arranged between the reduction box body 11 and the motor shaft 21, and the third bearing 14 is sleeved on the motor shaft 21 in an interference fit manner; specifically, the third bearing 14 is disposed between the left case 112 and the motor shaft 21, and the fourth bearing 15 is disposed between the right case 113 and the motor shaft 21. A shaft sleeve 22, a driving gear 23 and a gasket 24 are sequentially arranged on the motor shaft 21 between the third bearing 14 and the fourth bearing 15, the shaft sleeve 22 is sleeved on the motor shaft 21 in an interference fit mode, and an oil seal 16 is arranged between the shaft sleeve 22 and the reduction box body 11. An oil seal 16 is mounted on the reduction gear box body and used for preventing lubricating oil in the reduction gear 1 from entering the motor 2; specifically, a sealing ring 25 is arranged between the shaft sleeve 22 and the motor shaft 21, and the sealing ring 25 can prevent lubricating oil in the reduction box body 11 from entering the motor 2; specifically, the motor shaft 21 is provided with a first annular groove 215, and the seal ring 25 is disposed in the first annular groove 215. The driving gear 23 is sleeved on the motor shaft 21 through spline fit, the driving gear 23 is in meshing transmission with the auxiliary shaft 12, the gasket 24 is sleeved on the motor shaft 21 and is respectively abutted against the driving gear 23 and the fourth bearing 15, and the driving gear 23 is prevented from axially shifting on the motor shaft 21. The driving gear 23 is connected with the motor shaft 21 through spline fit, and the driving gear 23 with different outer diameters can be replaced according to different transmission ratios of the speed reducer 1. Specifically, a first counter gear 121 and a second counter gear are mounted on the counter shaft 12, the first counter gear 121 is in spline fit with the counter shaft 12 and is in meshing transmission with the driving gear 23, an output gear 131 is sleeved on the output shaft 13 through interference fit, and the output gear 131 is in meshing transmission with the second counter gear. The first counter gear 121 is spline-fitted to the counter shaft 12, and the first counter gear 121 having a different outer diameter is replaced with a different first counter gear 121 according to the outer diameter of the drive gear 23, thereby changing the gear ratio of the reduction gear 1.

Through the interference fit of the third bearing 14 and the motor shaft 21, the axial movement of the third bearing 14 on the motor shaft 21 is avoided, and meanwhile, the third bearing 14 and the motor shaft 21 can be combined into a whole in advance, so that when the motor 2 is assembled with the speed reducer 1 and the motor shaft 21 is inserted into the speed reducer 1, the driving gear 23 on the motor shaft 21 does not need to pass through the third bearing 14, the outer diameter of the driving gear 23 is not limited by the diameter of the inner ring of the third bearing 14, and therefore the driving gear with the outer diameter larger than the inner diameter of the third bearing 14 can be replaced, namely the outer diameter of the driving gear 23 can be larger than the inner diameter. Meanwhile, the diameter of the motor shaft 21 is increased through the shaft sleeve 22, the oil seal 16 with larger inner diameter can be used between the shaft sleeve 22 and the reduction box body 11, and the driving gears 23 with different outer diameters can penetrate through the oil seal 16 and then are in transmission connection with the auxiliary shaft 12, so that the problem that the motor 2 is assembled on the reduction device 1 due to the fact that the outer diameters of the driving gears 23 on the motor shaft 21 are different is solved. The shaft sleeve 22 is sleeved on the motor shaft 21 through interference fit, and axial movement of the shaft sleeve 22 on the motor shaft 21 can also be avoided. When the double-wheel electric vehicle is used, the power of the motor 2 is transmitted through the motor shaft 21, the auxiliary shaft 12 and the output shaft 13 in sequence, and finally transmitted to the wheel hub of the double-wheel electric vehicle through the output shaft 13. The utility model is suitable for a big reduction ratio gear drive, under the same condition of double round electric motor car power demand, 1 drive ratio of decelerator is big more, and 2 peak torque of motor are little, and the motor volume under the equal power is just little, consequently makes the side hang motor volume under the equal power littleer, saves manufacturing cost, and is convenient to be the utility model discloses install on the wheel hub of double round electric motor car.

Specifically, the motor shaft 21 is provided with a first mounting section 211, a second mounting section 212, a third mounting section 213 and a fourth mounting section 214, the outer diameter of which is reduced in sequence, the third bearing 14 is sleeved on the first mounting section 211 through interference fit, the shaft sleeve 22 is sleeved on the second mounting section 212 through interference fit, the driving gear 23 is sleeved on the third mounting section 213 through spline fit, wherein the third mounting section 213 is provided with an external spline, the inner wall of the driving gear 23 is provided with an internal spline matched with the external spline, and the gasket 24 and the fourth bearing 15 are both sleeved on the fourth mounting section 214. Specifically, the first annular groove 215 may be provided on an end of the second mounting section 212 near the first mounting section 211. The end of the fourth mounting section 214 adjacent the third mounting section 213 is provided with a second annular groove 216, and the gasket 24 is disposed in the second annular groove 216. The washer 24 presses the driving gear 23 against the third mounting section 213, preventing the driving gear 23 from axially shifting on the motor shaft 21.

The motor 2 comprises a motor cover 26, a motor shell 27, a stator core 28, a rotor core 29, a motor shaft 21 and a position sensor, two ends of the motor shell 27 are open, one end of the motor shell 27 is fixed on the reduction box body 11, the other end of the motor shell is sealed by the motor cover 26, a winding 281 is wound on the stator core 28, the stator core 28 is fixed on the inner wall of the motor shell 27, the rotor core 29 is rotatably installed in the stator core 28 and fixedly sleeved on the motor shaft 21, and the position sensor is arranged on the motor cover 26. The position sensor is used to detect the position of the rotor core 29 in the motor 2. In order to facilitate installation and maintenance of the position sensor, the motor 2 further comprises a left end cover, the left end cover is installed on the motor cover 26 through bolt connection, a containing cavity is formed by the left end cover and the motor cover 26 in a surrounding mode, and the position sensor is located in the containing cavity.

Compared with the prior art, the beneficial effects of the utility model are that: the processing technology is simple, the third bearing 14 and the motor shaft 21 are combined into a whole in advance through the interference fit of the third bearing 14 and the motor shaft 21, so that when the motor 2 is assembled with the speed reducer 1, the driving gear 23 on the motor shaft 21 does not need to pass through the third bearing 14, and the outer diameter of the driving gear 23 is not limited by the diameter of the inner ring of the third bearing 14; meanwhile, the diameter of the motor shaft 21 is increased through the shaft sleeve 22, the oil seal 16 with larger inner diameter can be used between the shaft sleeve 22 and the reduction box body 11, and the driving gears 23 with different outer diameters can penetrate through the oil seal 16 and then are in transmission connection with the auxiliary shaft 12, so that the problems that the driving gears 23 on the motor shaft 21 are different in outer diameter and the motor 2 is assembled on the reduction device 1 are solved; the utility model is suitable for a big reduction ratio gear drive, under the condition that the power demand of the two-wheeled electric motor car is the same, the larger the transmission ratio of the speed reducer 1 is, the smaller the peak torque of the motor 2 is, so the volume of the side-hung motor under the same power is smaller, the manufacturing cost is saved, and the utility model is convenient to be installed on the wheel hub of the two-wheeled electric motor car; meanwhile, gear lubricating oil in the gearbox body is ensured not to flow into the motor through the oil seal.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.

Claims

1. A variable-speed transmission mechanism of a side-hung motor is characterized by comprising a speed reducer and the motor, wherein the speed reducer comprises a speed reducer box body, an auxiliary shaft and an output shaft, a protruding installation part is arranged on the outer side wall of the speed reducer box body, the auxiliary shaft is supported in the speed reducer box body through a first bearing, the output shaft is supported with the speed reducer box body through a second bearing, the output shaft and the auxiliary shaft are in meshing transmission through gears, and one end of the output shaft extends out of the speed reducer box body and is connected with a hub of a two-wheel electric vehicle;

the motor shaft is last to be located the position between third bearing and the fourth bearing and installs axle sleeve, drive gear and gasket in proper order, the axle sleeve is established on the motor shaft through interference fit cover, install the oil blanket between axle sleeve and the reduction box, drive gear passes through spline fit cover and establishes on the motor shaft, just drive gear and countershaft meshing transmission, the gasket cover is established on the motor shaft and its respectively with drive gear and fourth bearing butt.

2. The variable speed drive of a side hung motor according to claim 1, wherein a seal is provided between the bushing and the motor shaft.

3. The variable speed drive of a side hung motor according to claim 2, wherein the motor shaft is provided with a first annular groove, and the seal ring is disposed in the first annular groove.

4. The variable speed transmission mechanism of the side hung motor according to claim 1, wherein the motor shaft is provided with a first mounting section, a second mounting section, a third mounting section and a fourth mounting section, the outer diameter of which is reduced in sequence, the third bearing is sleeved on the first mounting section through interference fit, the shaft sleeve is sleeved on the second mounting section through interference fit, the driving gear is sleeved on the third mounting section through spline fit, wherein the third mounting section is provided with an external spline, the inner wall of the driving gear is provided with an internal spline matched with the external spline, and the gasket and the fourth bearing are sleeved on the fourth mounting section.

5. The variable speed drive of a side hung motor according to claim 4, wherein the end of the fourth mounting section adjacent to the third mounting section is provided with a second annular groove, and the spacer is disposed in the second annular groove.

6. The variable speed transmission mechanism of the side hanging motor as claimed in claim 1, wherein the countershaft is provided with a first countershaft gear and a second countershaft gear, the first countershaft gear and the countershaft are in spline fit and in meshed transmission with the driving gear, the output shaft is sleeved with an output gear through interference fit, and the output gear is in meshed transmission with the second countershaft gear.

7. The variable speed transmission mechanism of a side-hung motor according to claim 1, wherein the reduction box body is fixedly connected with a left box body and a right box body, the motor is installed on the left box body, the left box body is also used as a motor end cover of the motor, the third bearing is arranged between the left box body and the motor shaft, the fourth bearing is arranged between the right box body and the motor shaft, and the protruding installation part is arranged on the left box body.

8. The variable speed drive mechanism of a side hung motor according to claim 7, wherein the left box body is further provided with an arc-shaped mounting part.

9. The variable speed transmission mechanism of a side hung motor according to claim 1, wherein the motor comprises a motor cover, a motor shell, a stator core, a rotor core, a motor shaft and a position sensor, two ends of the motor shell are open, one end of the motor shell is fixed on the reduction box body, the other end of the motor shell is sealed by the motor cover, a winding is wound on the stator core and fixed on the inner wall of the motor shell, the rotor core is rotatably installed in the stator core and fixedly sleeved on the motor shaft, and the position sensor is arranged on the motor cover.