CN214189984U

CN214189984U - Centrally-mounted chain transmission type central electric drive system

Info

Publication number: CN214189984U
Application number: CN202023038473.0U
Authority: CN
Inventors: 薛荣生; 张引航; 陈俊杰; 王靖; 陈同浩; 舒雷; 谭志康; 邓天仪; 邓云帆; 梁品权; 颜昌权
Original assignee: Southwest University
Current assignee: Southwest University
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-09-14
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a put chain drive formula central authorities electric drive system, including power input mechanism, drive wheel, set up at the epaxial speed reduction input mechanism of the outer jackshaft of wheel, through the wheel installation axle of chain drive subassembly with the outer jackshaft of wheel and set up the epaxial speed reduction output mechanism of wheel installation, power input mechanism loops through speed reduction input mechanism, chain drive subassembly, wheel installation axle, speed reduction output mechanism and power output part and gives the drive wheel with power transmission. By adopting the technical scheme, the advantages of a central driving structure are reserved, the motor is arranged in the middle of the two-wheel vehicle, the speed reducing mechanism is arranged on one side of the driving wheel, and meanwhile, the chain transmission mode is adopted, so that the impact of acceleration and deceleration of the two-wheel vehicle can be buffered, and the distance change between chain wheels caused by vertical oscillation of a suspension system can be reduced; in addition, a speed reduction input mechanism is additionally arranged beside the power input mechanism, so that the speed reduction ratio is further increased.

Description

Centrally-mounted chain transmission type central electric drive system

Technical Field

The utility model relates to a two wheeler electric drive system technical field, concretely relates to put central drive formula central authorities electric drive system of chain drive.

Background

With the increasing strictness of environmental protection laws and regulations, it is becoming popular that two-wheeled vehicles powered by pure electricity gradually replace traditional fuel two-wheeled vehicles. The existing two-wheeled electric vehicle generally adopts a hub motor, a middle-arranged drive and a motor side-hanging structure.

The structure of the hub motor is generally that a low-speed motor is directly connected with a wheel for driving, and the low-speed motor has the problems of large volume, heavy weight and low efficiency (the efficiency is generally 60-80%). Further, the starting current is large, and the amount of heat generated is large due to the fact that the rotation is easily blocked. Meanwhile, the motor is widely used for electric vehicles within 40km/h due to poor control performance, and a low-speed motor with higher cost needs to be selected if the vehicle speed reaches more than 50km/h, so that the motor is extremely poor in control performance and safety, easy to cause tire burst and the like, and almost cannot be used.

The central driving structure generally drives the hub through the chain-adding transmission of a medium-low speed motor or the belt transmission, the reduction ratio is generally about 3.5-4.5, and the problems of complex structure, large volume and heavy weight exist. Meanwhile, the transmission efficiency is low, the number of external parts is large, the external parts are easy to damage, and the external parts need to be replaced periodically, so that the use and maintenance cost is high. In addition, the reduction mechanism is large in size, so that the installation space of the battery pack is occupied, and the endurance mileage is short.

The side-hung type driving structure generally comprises a high-speed motor and a speed reducing mechanism, is arranged on one side of a vehicle driving wheel, belongs to a multi-parallel-shaft driving speed reducing mechanism, and has the problems of complex structure, more parts and heavy box body, so that a wheel hub adopts a cup-shaped structure, the weight is increased, and the controllability is influenced. In addition, the cost is high, the appearance is not beautiful, and the popularization and the use are influenced.

Therefore, the utility model discloses the people team has designed a brand-new central drive formula electric drive system, remedies the three not enough, not only can guarantee well the equilibrium and the nature controlled of whole car, has high mechanical efficiency moreover, compact structure, and the dispersion is independent, has good penetrating heat dispersion of windward, and light in weight is particularly useful for electric two wheeler.

However, utility model people team in design and testing process discovery, the impact that the impact and the suspension system of central drive formula electric drive system acceleration and deceleration vibrate the impact that causes from top to bottom can not cushion the vehicle very well to also be difficult to realize great reduction ratio, can not satisfy special case's application demand.

It is urgent to solve the above problems.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a put central drive system of chain drive formula.

The technical scheme is as follows:

the utility model provides a put central electric drive system of chain drive formula, its main points lie in, including power input mechanism, drive wheel, set up the speed reduction input mechanism on the outer jackshaft of wheel, through the wheel installation axle of chain drive subassembly with the outer jackshaft of wheel and set up the epaxial speed reduction output mechanism of wheel installation, wheel installation axle wears to establish on the drive wheel, chain drive subassembly and speed reduction mechanism are located the both sides of drive wheel respectively, power input mechanism loops through speed reduction input mechanism, chain drive subassembly, wheel installation axle, speed reduction output mechanism and power output part and gives the drive wheel with power transmission.

By adopting the structure, the advantages of a central driving structure are retained, the balance and the controllability of the whole vehicle can be well ensured, the mechanical efficiency is extremely high, the structure is compact, the dispersion is independent, the windward transparent heat dissipation performance is good, and the weight is light; the motor is arranged in the middle of the two-wheeled vehicle, the speed reducing mechanism is arranged on one side of the driving wheel, and meanwhile, the chain transmission mode is adopted, so that the impact of acceleration and deceleration of the two-wheeled vehicle can be buffered, the distance change between chain wheels caused by vertical oscillation of a suspension system can be reduced, the speed reducing ratio is increased to a certain extent, and the efficiency of the motor is improved; in addition, the power input mechanism and the speed reduction input mechanism are arranged in the middle of the original two-wheel vehicle, the speed reduction ratio is further increased, the effects of speed reduction and torque increase are achieved, the efficiency of the motor is improved, the motor is particularly suitable for mountain road conditions, and power and endurance mileage are increased.

Preferably, the method comprises the following steps: the power input mechanism comprises a driving motor and an input primary driving gear which synchronously rotates with a motor shaft of the driving motor, and the input primary driving gear transmits power to the chain transmission assembly through the speed reduction input mechanism. With the above configuration, power can be stably and reliably input.

Preferably, the method comprises the following steps: the speed reduction input mechanism comprises an input shaft parallel to the outer intermediate shaft of the wheel and a motor shaft, an input first-stage driven gear synchronously rotationally sleeved on the input shaft, a power connecting sleeve rotatably sleeved on the outer intermediate shaft of the wheel and an input second-stage driven gear synchronously rotationally sleeved on the power connecting sleeve, the power connecting sleeve synchronously rotates with a driving chain wheel of the chain transmission assembly, the input first-stage driving gear is meshed with the input first-stage driven gear, and an input second-stage driving gear meshed with the input second-stage driven gear is formed on the input shaft. With the above configuration, the reduction gear can be stably and reliably performed.

Preferably, the method comprises the following steps: the power connecting sleeve comprises a sleeve type mounting part and a disc type connecting part which are integrally formed, the sleeve type mounting part is rotatably sleeved on the outer intermediate shaft of the wheel, the input secondary driven gear is sleeved on the sleeve type mounting part in a synchronous rotating mode, and the disc type connecting part and the driving chain wheel rotate synchronously. Structure more than adopting, through connecting the cover with power and designing into integrated into one piece's shell type installation department and disk connecting portion, can enough guarantee the stable transmission between the spare part, easily assembly again.

Preferably, the method comprises the following steps: the speed reduction output mechanism comprises a speed reduction first-stage driving gear, a speed reduction shaft, a speed reduction second-stage driven gear, a speed reduction first-stage driven gear, a power output sleeve and a speed reduction second-stage driven gear, wherein the speed reduction first-stage driving gear is sleeved on the wheel installation shaft in a synchronous rotating mode, the speed reduction first-stage driven gear is sleeved on the speed reduction shaft in a rotating mode, the power output sleeve is sleeved on the wheel installation shaft in a rotating mode, the speed reduction second-stage driven gear is sleeved on the power output sleeve in a rotating mode, the speed reduction first-stage driving gear is meshed with the speed reduction first-stage driven gear, a speed reduction second-stage driving gear meshed with the speed reduction second-stage driven gear is arranged on the speed reduction shaft in a rotating mode, and the driving wheel is sleeved on the power output sleeve in a rotating mode. With the above configuration, the reduction gear can be stably and reliably performed.

Preferably, the method comprises the following steps: the power output sleeve comprises an installation sleeve portion and a connecting disc portion which are integrally formed, the connecting disc portion is connected with a combined hub of the driving wheel through a plurality of first bolts, the installation sleeve portion is rotatably sleeved on the wheel installation shaft, and the speed reduction secondary driven gear is synchronously rotatably sleeved on the installation sleeve portion. By adopting the structure, the matching of the mounting sleeve part and the connecting disc part can ensure stable transmission between parts and is easy to assemble.

Preferably, the method comprises the following steps: and the speed reduction secondary driven gear and the mounting sleeve part as well as the speed reduction primary driving gear and the wheel mounting shaft are in spline fit. By adopting the structure, the structure is simple and reliable, and the processing and the assembly are easy.

Preferably, the method comprises the following steps: the speed reduction secondary driven gear is locked on the mounting sleeve part through the locking sleeve, an end face bearing is arranged between the locking sleeve and the speed reduction primary driving gear, and one side, far away from the end face bearing, of the speed reduction primary driving gear is locked through a half-moon key so as to lock the speed reduction primary driving gear on a wheel mounting shaft. By adopting the structure, the two-stage speed reduction driven gear and the one-stage speed reduction driving gear can be reliably mounted.

Preferably, the method comprises the following steps: the chain transmission assembly comprises a driving chain wheel, a driven chain wheel and a chain, wherein the driving chain wheel is sleeved on the motor shaft in a synchronous rotating mode, the driven chain wheel is sleeved on the wheel mounting shaft in a synchronous rotating mode, the chain is connected between the driving chain wheel and the driven chain wheel, and the driven chain wheel is located on one side, away from the speed reducing mechanism, of the driving wheel. By adopting the structure, the speed reduction transmission is realized through the chain transmission assembly, and a central driving form is formed.

Preferably, the method comprises the following steps: the drive wheel includes combination formula wheel hub and tire, combination formula wheel hub includes the wheel hub main part and installs the ring seat through the fixed suit of a plurality of second bolts tire in the wheel hub main part periphery, the tire suit is on tire installation ring seat. By adopting the structure, the tire is convenient to disassemble and repair when being damaged, and the speed reducing mechanism is convenient to assemble.

Compared with the prior art, the beneficial effects of the utility model are that:

the mid-set chain transmission type central electric drive system adopting the technical scheme has the advantages of novel structure, ingenious design and easiness in implementation, not only retains the advantages of a central drive structure, but also can well ensure the balance and the controllability of the whole vehicle, has extremely high mechanical efficiency, compact structure, dispersion and independence, has good windward transparent heat dissipation performance and light weight; the motor is arranged in the middle of the two-wheeled vehicle, the speed reducing mechanism is arranged on one side of the driving wheel, and meanwhile, the chain transmission mode is adopted, so that the impact of acceleration and deceleration of the two-wheeled vehicle can be buffered, the distance change between chain wheels caused by vertical oscillation of a suspension system can be reduced, the speed reducing ratio is increased to a certain extent, and the efficiency of the motor is improved; in addition, the power input mechanism and the speed reduction input mechanism are arranged in the middle of the original two-wheel vehicle, the speed reduction ratio is further increased, the effects of speed reduction and torque increase are achieved, the efficiency of the motor is improved, the motor is particularly suitable for mountain road conditions, and power and endurance mileage are increased.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the mating relationship of the drive wheel, the wheel mounting shaft and the reduction output mechanism;

fig. 3 is a schematic diagram of the engagement relationship of the power input mechanism and the reduction input mechanism.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1, a central chain drive type central electric drive system mainly includes a power input mechanism, a driving wheel 3, a speed reduction input mechanism disposed on an outer intermediate shaft 19, a wheel mounting shaft 2 connected with the outer intermediate shaft 19 through a chain drive assembly, and a speed reduction output mechanism disposed on the wheel mounting shaft 2, wherein the wheel mounting shaft 2 is disposed on the driving wheel 3 in a penetrating manner, the chain drive assembly and the speed reduction mechanism are respectively disposed on two sides of the driving wheel 3, and the power input mechanism transmits power to the driving wheel 3 sequentially through the speed reduction input mechanism, the chain drive assembly, the wheel mounting shaft 2, the speed reduction output mechanism, and a power output component. The chain transmission assembly and the speed reducing mechanism are respectively positioned on two sides of the driving wheel 3 to form a central driving mode, balance and controllability of the whole vehicle can be well guaranteed, and the integrated vehicle has extremely high mechanical efficiency, compact structure, independent dispersion, good windward transparent heat dissipation performance and light weight. The chain transmission assembly is used for transmitting between the wheel mounting shaft 2 and the motor shaft 1a of the motor 1, so that the impact of acceleration and deceleration of the two-wheel vehicle can be buffered, the distance change between chain wheels caused by vertical oscillation of a suspension system can be reduced, the reduction ratio is further increased, the efficiency of the motor is further improved, and the endurance mileage is increased. In addition, the power input mechanism and the speed reduction input mechanism are arranged in the middle of the original two-wheel vehicle, the speed reduction ratio is further increased, the effects of speed reduction and torque increase are achieved, the efficiency of the motor is improved, the motor is particularly suitable for mountain road conditions, and power and endurance mileage are increased.

Referring to fig. 1 and 3, the power input mechanism includes a driving motor 1, and an input primary driving gear 20 rotating synchronously with a motor shaft 1a of the driving motor 1, and the input primary driving gear 20 transmits power to the chain transmission assembly through the speed reduction input mechanism.

The speed reduction input mechanism comprises an input shaft 21 parallel to the outer wheel intermediate shaft 19 and the motor shaft 1a, an input first-stage driven gear 22 synchronously and rotatably sleeved on the input shaft 21, a power connecting sleeve 23 rotatably sleeved on the outer wheel intermediate shaft 19 and an input second-stage driven gear 24 synchronously and rotatably sleeved on the power connecting sleeve 23, wherein the power connecting sleeve 23 and a driving chain wheel 13 of the chain transmission assembly synchronously rotate, the input first-stage driving gear 20 is meshed with the input first-stage driven gear 22, and an input second-stage driving gear 21a meshed with the input second-stage driven gear 24 is formed on the input shaft 21.

The power connecting sleeve 23 comprises a sleeve mounting portion 23a and a disc connecting portion 23b which are integrally formed, the sleeve mounting portion 23a is rotatably sleeved on the outer intermediate shaft 19, the input secondary driven gear 24 is synchronously rotatably sleeved on the sleeve mounting portion 23a, the disc connecting portion 23b and the driving sprocket 13 synchronously rotate, specifically, the disc connecting portion 23b and the driving sprocket 13 are locked through a plurality of third bolts 23, and the power connecting sleeve is simple and reliable.

Referring to fig. 1, the chain transmission assembly includes a driving sprocket 13 synchronously rotatably mounted on the motor shaft 1a, a driven sprocket 14 synchronously rotatably mounted on the wheel mounting shaft 2, and a chain 15 connected between the driving sprocket 13 and the driven sprocket 14, wherein the driven sprocket 14 is located on a side of the driving wheel 3 away from the speed reduction mechanism. Meanwhile, in order to prevent the oil leakage, oil seals 17 are provided inside the deep groove ball bearings 16 respectively located on both sides of the power output sleeve 8.

Referring to fig. 1 and 2, the speed reduction output mechanism includes a speed reduction primary driving gear 4 synchronously rotatably fitted on the wheel mounting shaft 2, a speed reduction shaft 5 parallel to the wheel mounting shaft 2, a speed reduction primary driven gear 6 synchronously rotatably fitted on the speed reduction shaft 5, a power output sleeve 8 rotatably fitted on the wheel mounting shaft 2, and a speed reduction secondary driven gear 7 synchronously rotatably fitted on the power output sleeve 8, the speed reduction primary driving gear 4 is engaged with the speed reduction primary driven gear 6, the speed reduction shaft 5 has a speed reduction secondary driving tooth 5a engaged with the speed reduction secondary driven gear 7, and the driving wheel 3 is synchronously rotatably fitted on the power output sleeve 8.

The power output sleeve 8 comprises an installation sleeve part 8a and a connecting disc part 8b which are integrally formed, the connecting disc part 8b is connected with a combined hub of the driving wheel 3 through a plurality of first bolts 9, the installation sleeve part 8a is rotatably sleeved on the wheel installation shaft 2, and the speed reduction secondary driven gear 7 is synchronously rotatably sleeved on the installation sleeve part 8 a. The two-stage reduction driven gear 7 and the mounting sleeve portion 8a as well as the one-stage reduction driving gear 4 and the wheel mounting shaft 2 are in spline fit, and the two-stage reduction driving gear is simple and reliable.

The speed reduction secondary driven gear 7 is locked on the mounting sleeve part 8a through the locking sleeve 10, the end face bearing 11 is arranged between the locking sleeve 10 and the speed reduction primary driving gear 4, and one side, far away from the end face bearing 11, of the speed reduction primary driving gear 4 is locked through the half-moon key 12 so as to lock the speed reduction primary driving gear 4 on the wheel mounting shaft 2. By adopting the assembly structure, the reliable assembly of the speed reduction secondary driven gear 7 and the speed reduction primary driving gear 4 can be ensured.

Referring to fig. 2, the driving wheel 3 includes a combined hub and a tire 3a, the combined hub includes a hub main body 3c and a tire mounting ring seat 3b fixedly sleeved on the periphery of the hub main body 3c by a plurality of second bolts 18, the tire 3a is sleeved on the tire mounting ring seat 3b, which is convenient for disassembly and repair when the tire 3a is damaged, and is also convenient for assembly of the speed reducing mechanism.

A power transmission route:

the motor 1 → the input first-stage driving gear 20 → the input first-stage driven gear 22 → the input shaft 21 → the input second-stage driven gear 24 → the power connecting sleeve 23 → the driving sprocket 13 → the chain 15 → the driven sprocket 14 → the wheel mounting shaft 2 → the reduction first-stage driving gear 4 → the reduction first-stage driven gear 6 → the reduction shaft 5 → the reduction second-stage driven gear 7 → the power output sleeve 8 → the driving wheel 3.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. A center chain drive type central electric drive system is characterized in that: including power input mechanism, drive wheel (3), set up the speed reduction input mechanism on outer jackshaft (19) of wheel, wheel installation axle (2) and the speed reduction output mechanism of setting on wheel installation axle (2) that is connected through chain drive subassembly and outer jackshaft (19) of wheel, wheel installation axle (2) are worn to establish on drive wheel (3), chain drive subassembly and speed reduction mechanism are located the both sides of drive wheel (3) respectively, power input mechanism loops through speed reduction input mechanism, chain drive subassembly, wheel installation axle (2), speed reduction output mechanism and power output part and transmits power for drive wheel (3).

2. The center chain drive central electric drive system of claim 1, wherein: the power input mechanism comprises a driving motor (1) and an input first-stage driving gear (20) which synchronously rotates with a motor shaft (1a) of the driving motor (1), and the input first-stage driving gear (20) transmits power to the chain transmission assembly through the speed reduction input mechanism.

3. The center chain drive central electric drive system of claim 2, wherein: the speed reduction input mechanism comprises an input shaft (21) parallel to an outer intermediate shaft (19) of the wheel and a motor shaft (1a), an input first-stage driven gear (22) sleeved on the input shaft (21) in a synchronous rotating mode, a power connecting sleeve (23) sleeved on the outer intermediate shaft (19) of the wheel in a rotating mode and an input second-stage driven gear (24) sleeved on the power connecting sleeve (23) in a synchronous rotating mode, the power connecting sleeve (23) rotates synchronously with a driving chain wheel (13) of the chain transmission assembly, an input first-stage driving gear (20) is meshed with the input first-stage driven gear (22), and an input second-stage driving gear (21a) meshed with the input second-stage driven gear (24) is formed on the input shaft (21).

4. A center chain drive central electric drive system as set forth in claim 3, wherein: power adapter sleeve (23) is including integrated into one piece's shell type installation department (23a) and disk connecting portion (23b), shell type installation department (23a) rotationally the suit is on outer jackshaft (19) of wheel, input second grade driven gear (24) suit is on shell type installation department (23a) with synchronous rotation, disk connecting portion (23b) rotate with driving sprocket (13) are synchronous.

5. The center chain drive central electric drive system of claim 1, wherein: the speed reduction output mechanism comprises a speed reduction first-stage driving gear (4) which is synchronously and rotatably sleeved on a wheel installation shaft (2), a speed reduction shaft (5) which is parallel to the wheel installation shaft (2), a speed reduction first-stage driven gear (6) which is synchronously and rotatably sleeved on the speed reduction shaft (5), a power output sleeve (8) which is rotatably sleeved on the wheel installation shaft (2) and a speed reduction second-stage driven gear (7) which is synchronously and rotatably sleeved on the power output sleeve (8), the speed reduction first-stage driving gear (4) is meshed with the speed reduction first-stage driven gear (6), a speed reduction second-stage driving gear (5a) which is meshed with the speed reduction second-stage driven gear (7) is arranged on the speed reduction shaft (5), and a driving wheel (3) is synchronously and rotatably sleeved on the power output sleeve (8).

6. The center chain drive central electric drive system of claim 5, wherein: power take off cover (8) are including integrated into one piece's installation cover portion (8a) and connection dish portion (8b), connection dish portion (8b) are connected with the combination formula wheel hub of drive wheel (3) through a plurality of first bolts (9), installation cover portion (8a) rotationally the suit is on wheel installation axle (2), speed reduction second grade driven gear (7) suit is on installation cover portion (8a) with synchronous rotation.

7. The center chain drive central electric drive system of claim 6, wherein: and the speed reduction secondary driven gear (7) and the mounting sleeve part (8a) as well as the speed reduction primary driving gear (4) and the wheel mounting shaft (2) are in spline fit.

8. The center chain drive central electric drive system of claim 6, wherein: speed reduction secondary driven gear (7) are locked on installation cover portion (8a) through lock sleeve (10), be provided with end face bearing (11) between lock sleeve (10) and speed reduction one-level driving gear (4), the one side that end face bearing (11) were kept away from in speed reduction one-level driving gear (4) is through half moon key (12) locking to lock speed reduction one-level driving gear (4) on wheel installation axle (2).

9. The center chain drive central electric drive system of claim 1, wherein: chain drive assembly includes drive sprocket (13) of synchronous rotation ground suit on motor shaft (1a), synchronous rotation ground suit driven sprocket (14) on wheel installation axle (2) and connect chain (15) between drive sprocket (13) and driven sprocket (14), driven sprocket (14) are located drive wheel (3) and keep away from reduction gears's one side.

10. The center chain drive central electric drive system of claim 1, wherein: drive wheel (3) are including combination formula wheel hub and tire (3a), combination formula wheel hub includes wheel hub main part (3c) and fixes the tire collar extension (3b) of adorning in wheel hub main part (3c) periphery through a plurality of second bolts (18), tire (3a) suit is on tire collar extension (3 b).