CN216101498U

CN216101498U - Main and auxiliary box power assembly of double motors

Info

Publication number: CN216101498U
Application number: CN202121856154.2U
Authority: CN
Inventors: 刘建; 王天灵; 张波; 程浩
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-03-22
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses a double-motor main and auxiliary box power assembly which comprises a gearbox, a first motor and a second motor, wherein a front shaft and a rear shaft are sequentially arranged in the middle of the gearbox, and the first motor and the second motor are in transmission connection with the front shaft through a gear pair; a second gear is fixed on the front shaft, a first gear is sleeved on the rear shaft in a hollow manner, side shafts are arranged on two sides of the rear shaft, and the side shafts are in transmission connection with the second gear and the first gear through a side shaft gear I and a side shaft gear II respectively; the rear shaft between the two gears and the first gear is also provided with a gear shifting combination sleeve which can axially move relative to the rear shaft and synchronously rotate, and the gear shifting combination sleeve can be respectively selected to be combined with or separated from the two gears and the first gear through sliding. The utility model has the advantages that one gear is only provided with a pair of gear shifting gear pairs, the number of gear shifting gears is small, the structure is simple and compact, the bearing capacity is strong, and the reliability is high.

Description

Main and auxiliary box power assembly of double motors

Technical Field

The utility model relates to the technical field of new energy pure electric vehicle parts, in particular to a double-motor main and auxiliary box power assembly.

Background

With the increasing energy problem, new energy has become a hot topic. As far as now, the field of passenger vehicles has achieved significant success, commercial vehicle companies are also moving at a pace to continue to launch all-electric vehicle models. The mining truck is a heavy truck used for completing the tasks of rock earthwork stripping and ore transportation in an open-pit mine, and has the working characteristics of short distance and heavy load bearing, and is usually loaded by a large electric shovel or a hydraulic shovel to and fro a mining point and a mine unloading point. Besides the requirement of facing external environments such as severe working conditions and the like, the pure electric mine card also needs to overcome the hard conditions of sufficient power output, cruising ability, reliability of the whole vehicle and the like.

The patent number "CN 105416049A" discloses a vehicle double-shaft parallel electric drive system and a gear shift control method thereof, wherein the system comprises a drive motor I, a drive motor II and an electric control mechanical automatic transmission, and the electric control mechanical automatic transmission comprises a first-gear pair, a second-gear pair, a third-gear pair, a fourth-gear pair, a joint sleeve I, a joint sleeve II, a transmission input shaft I, a transmission input shaft II and a transmission output shaft III.

The pure electric double-motor power assembly has the following defects in the operation of matching the mine card: the two motors respectively and independently transmit power to the design structure of the gear shifting gears, so that each gear has 2 pairs of gear shifting gear pairs, the structure is tedious, and the manufacturing cost is high.

In addition, the existing gear shifting adopts a mode of driving a gear rack by a motor, so that clamping stagnation is easy to occur, and gear shifting is not in place; and the lubricating oil, the cooling oil and the motor are shared into a whole, the cooling effect of the motor is poor, the motor is over-temperature to give an alarm, the viscosity of the gear lubricating oil of the gearbox is insufficient, and the service life of poor gear lubrication is shortened.

The information disclosed in the background section above is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a double-motor main and auxiliary box power assembly, one gear only has a pair of gear shifting gear pairs, the gear shifting gears are few, the structure is simple and compact, the double-motor main and auxiliary box power assembly can be matched with a mining pure electric heavy truck with the off-road load of 100-120 tons, the bearing capacity is strong, and the reliability is high.

In order to realize the purpose of the utility model, the technical proposal of the utility model is as follows:

the utility model provides a two motor owner auxiliary tank power assembly, includes gearbox, first motor, second motor, wherein: the middle part of the gearbox is sequentially provided with a front shaft and a rear shaft, and the first motor and the second motor are in transmission connection with the front shaft through a gear pair; a second gear is fixed on the front shaft, a first gear is sleeved on the rear shaft in a hollow manner, side shafts are arranged on two sides of the rear shaft, and the side shafts are in transmission connection with the second gear and the first gear through a side shaft gear I and a side shaft gear II respectively; the rear shaft between the two gears and the first gear is also provided with a gear shifting combination sleeve which can axially move relative to the rear shaft and synchronously rotate, and the gear shifting combination sleeve can be respectively selected to be combined with or separated from the two gears and the first gear through sliding.

Specifically, a first input shaft and a second input shaft are respectively arranged on two sides in a front box of the gearbox, a first input shaft gear and a second input shaft gear are respectively fixed on the first input shaft and the second input shaft, and a main reduction gear is fixed on the front shaft; the first motor and the second motor are connected with the first input shaft and the second input shaft respectively, and the first input shaft gear and the second input shaft gear are meshed with the main reduction gear together.

Specifically, the first input shaft and the first input shaft gear are an integrated gear shaft component, and the second input shaft gear are an integrated gear shaft component.

Specifically, the side shaft and the side shaft gear II are integrated gear shaft components.

Specifically, the gear shifting combination sleeve is connected with the rear shaft through a spline.

The gearbox comprises a front shell, a main box shell and an auxiliary box shell which are connected in sequence, wherein two ends of a first input shaft and a second input shaft are respectively installed on the front shell and the main box shell through bearings; two ends of the side shaft are respectively arranged on the main box shell and the auxiliary box shell through bearings; the front shaft is mounted on the front shell and the main box shell through bearings, and the rear shaft is mounted on the auxiliary box shell through bearings.

The utility model has the beneficial effects that:

1. according to the scheme of the utility model, 1 gear of the double motor is only provided with 1 pair of gear shifting gear pairs, so that the gear shifting gears are few, the structure is simple and compact, and the cost is lower;

2. the double-side shaft component transmission is realized, the axial size of the gearbox is short, the transmission arrangement with a small wheel track of a heavy mining dump truck is adapted, the length of a power assembly can be 990mm, the width of the body is 780mm, the matching performance of the whole truck is good, and a space is reserved for the arrangement of small three motors;

3. the power assembly is double-motor power input, single motor input can be realized according to the power requirement of the whole vehicle, the other motor idles along with the power, and the selectivity is strong;

4. the power can be output to a side shaft to be used as a power take-off shaft, and the power take-off structure is provided with a mature PTO power take-off structure of a commercial vehicle;

5. the gearbox adopts the modularization mode partial shipment, convenient dismantlement simultaneously, and maintainability is good.

Drawings

FIG. 1 is a simplified schematic diagram of a dual-motor main and auxiliary box power assembly according to the present invention.

FIG. 2 is an exploded view of a dual-motor main and auxiliary box power assembly of the present invention.

FIG. 3 is a cross-sectional view of a dual-motor main and auxiliary box power assembly of the present invention.

In the figure, 100-gearbox, 101-front housing, 102-main box housing, 103-auxiliary box housing, 110-front axle, 111-two gear, 112-main reduction gear, 120-rear axle, 121-first gear, 122-shift coupling sleeve, 130-side axle, 131-side axle gear I, 132-side axle gear II, 140-first input axle, 141-first input axle gear, 150-second input axle, 151-second input axle gear, 200-first motor, 300-second motor.

Detailed Description

In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings. In the description of the embodiments, it is to be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the embodiments and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation and thus should not be construed as limiting the present invention.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a dual-motor main and auxiliary box power assembly, which mainly includes a transmission 100, a first motor 200, and a second motor 300. The main point is that a front shaft 110 and a rear shaft 120 are coaxially arranged in the middle of the gearbox 100 along the length direction of the gearbox 100 in sequence, and the first motor 200 and the second motor 300 are in transmission connection with the front shaft 110 through a gear pair and transmit power to the front shaft 110 together; a second gear 111 is fixed on the front shaft 110, and a first gear 121 is sleeved on the rear shaft 120 and can keep relative rotation with the output shaft 120; the two sides of the rear axle 120 are both provided with side axles 130, and in this embodiment, the two side axles 130 are connected in parallel for output. The side shaft 130 is in transmission connection with the second gear 111 and the first gear 121 through a side shaft gear I131 and a side shaft gear II132 respectively; the gear ratios of the side shaft gear I131 and the side shaft gear II132 are different; a shift coupling sleeve 122 that is axially movable relative to the rear shaft 120 and synchronously rotates is further provided on the rear shaft 120 between the second gear 111 and the first gear 121, and the shift coupling sleeve 122 can be selectively coupled to or decoupled from the second gear 111 and the first gear 121 by sliding. The rear shaft 120 penetrates out of the rear end of the gearbox 100 and is used for being in transmission connection with an external wheel system to provide power; the side shaft 130 extends out of the rear end of the transmission 100 to provide a power take-off structure for the vehicle.

The working principle of the embodiment is as follows: when the gear shifting engaging sleeve 122 moves to the left from the position shown in fig. 1, the gear shifting engaging sleeve 122 is engaged with the second gear 111, and is in a second gear power transmission state, and at this time, power is directly transmitted from the second gear 111 to the rear shaft 120 through the gear shifting engaging sleeve 122, so that a second gear reduction ratio of 3.7 is realized; when the shift coupling sleeve 122 is located at the position of fig. 1, the shift coupling sleeve 122 is not coupled to the second gear 111 or the first gear 121, and power cannot be transmitted to the rear shaft 120, so that the rear shaft is in a neutral state; when the shift coupling sleeve 122 moves from the position of fig. 1 to the right, the shift coupling sleeve 122 is coupled with the first gear 121 to be in the first gear state, at this time, power is output in parallel to the side shaft gears I131 of the two side shafts 130 through the middle second gear 111, and the side shaft gears I131 and the side shaft gears II132 are fixed on the same shaft and keep rotating synchronously, so that the power is synchronously transmitted to the two side shaft gears II132, the side shaft gears II132 output the power in parallel to the first gear 121, and the first gear 121 outputs the power to the rear shaft 120 through the shift coupling sleeve 122, thereby realizing the first gear reduction ratio of 9.25.

Through the scheme of the embodiment, the power splitting input of the parallel double motors, the transmission of the double middle shaft type gear, the electrically controlled pneumatic gear shifting AMT2 gear and the power assembly with the power take-off structure are adopted, the motor controller is controlled by the whole vehicle TCU to adjust the rotating speed of the motor, so that the rotating speed of the input gear in the gearbox and the rotating speed of the output shaft are synchronous to realize the traveling gear shifting, one gear only has a pair of gear shifting gear pairs, the gear shifting gears are few, the structure is simple and compact, and the cost is lower. The power assembly has strong power, is matched with a mining pure electric heavy truck with the off-road load of 100-120 tons, and has simple structure, strong bearing capacity and high reliability; the length of the power assembly is 990mm, the width of the power assembly is 780mm, the matching performance of the whole vehicle is good, and a space is reserved for the arrangement of three small batteries; the risk components such as transmission, gear shifting, power taking and the like can all adopt industrial mature products, the risk is reduced, and the purpose of the utility model is achieved.

As a preferable technical solution of this embodiment, a first input shaft 140 and a second input shaft 150 are respectively disposed at two sides in a front box of the transmission 100, a first input shaft gear 141 and a second input shaft gear 151 are respectively fixed on the first input shaft 140 and the second input shaft 150, and a main reduction gear 112 is fixed on the front shaft 110; the first and

second motors

200 and 300 are connected to the first and

second input shafts

140 and 150, respectively, and the first and second

input shaft gears

141 and 151 are engaged with the main reduction gear 112 in common. The first motor 200 and the second motor 300 can be operated synchronously by the common gear transmission in one gear pair.

As a preferred technical solution of this embodiment, the shift coupling sleeve 122 is connected with the rear axle 120 by a spline, so as to achieve the effect of being axially movable but not relatively rotatable.

Example 2

In this embodiment, the space of the assembly is further optimized through the structure of the main-sub transmission case on the basis of embodiment 1, specifically, as shown in fig. 2-3, the transmission case 100 includes a front case 101, a main case 102 and a sub case 103 which are connected in sequence, and both ends of the first input shaft 140 and the second input shaft 150 are respectively mounted on the front case 101 and the main case 102 through bearings; two ends of the side shaft 130 are respectively arranged on the main box shell 102 and the auxiliary box shell 103 through bearings; the front shaft 110 is mounted to the front housing 101 and the main casing 102 by bearings, and the rear shaft 120 is mounted to the sub casing 103 by bearings.

In the assembling process of the power assembly, a modularized split charging mode is adopted for split charging the main box shell 102, the auxiliary box shell 103 and the motor, and finally the assembly is formed, so that the assembly is simple and convenient to disassemble, assemble and maintain. The operation is simple, and specifically comprises the following steps:

1. firstly, pressing a bearing on a corresponding shaft;

2. sub-packaging of the main box housing 102: the first input shaft 140, the second input shaft 150, the front shaft 110 and the gears connected with the front shaft, the main box shell 102 and the front shell 101 are assembled together;

3. sub-tank case 103 split charging: the side shaft 130, the rear shaft 120 and the gears connected with the side shaft and the rear shaft are separately assembled with the auxiliary box shell 103;

4. the main box shell 102 and the auxiliary box shell 103 are combined;

5. the entire transmission 100 is mounted with the first and second

electric machines

200 and 300.

As a preferred solution of the present embodiment, the first input shaft 140 and the first input shaft gear 141 are an integrated gear shaft member, and the second input shaft 150 and the second input shaft gear 151 are an integrated gear shaft member, so that the number of parts can be reduced; similarly, the side shaft 130 and the side shaft gear II132 are integrated gear shaft members, and the side shaft gear I131 penetrates into the shaft as a split part, so that the assembly structure is more compact.

In addition, in some embodiments which are not described in the specification, the cooling systems of the motor and the gearbox can be arranged separately, the motor is water-cooled, the gearbox is oil-cooled, the heat management performance is good, and the reliability is high; the motor cooling system is used for solving the problems that the existing lubricating and cooling oil and the motor are shared integrally, the cooling effect of the motor is poor, the motor is over-temperature to alarm, the viscosity of the gear lubricating oil of a gearbox is insufficient, and the service life of the gear lubrication is poor.

Although the utility model has been described in detail above with reference to specific embodiments, it will be apparent to one skilled in the art that modifications or improvements may be made based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims

1. The utility model provides a two motor owner auxiliary tank power assembly, includes gearbox (100), first motor (200), second motor (300), its characterized in that:

a front shaft (110) and a rear shaft (120) are sequentially arranged in the middle of the gearbox (100), and the first motor (200) and the second motor (300) are in transmission connection with the front shaft (110) through a gear pair; a second gear (111) is fixed on the front shaft (110), a first gear (121) is sleeved on the rear shaft (120) in a hollow manner, side shafts (130) are arranged on two sides of the rear shaft (120), and the side shafts (130) are in transmission connection with the second gear (111) and the first gear (121) through side shaft gears I (131) and II (132) respectively; a gear shifting coupling sleeve (122) which can move axially relative to the rear shaft (120) and synchronously rotate is further arranged on the rear shaft (120) between the two gears (111) and the first gear (121), and the gear shifting coupling sleeve (122) can be respectively selected to be coupled with or separated from the two gears (111) and the first gear (121) by sliding.

2. The dual-motor main and auxiliary box power assembly as claimed in claim 1, wherein: a first input shaft (140) and a second input shaft (150) are respectively arranged on two sides in a front box of the gearbox (100), a first input shaft gear (141) and a second input shaft gear (151) are respectively fixed on the first input shaft (140) and the second input shaft (150), and a main reduction gear (112) is fixed on the front shaft (110); the first motor (200) and the second motor (300) are respectively connected with the first input shaft (140) and the second input shaft (150), and the first input shaft gear (141) and the second input shaft gear (151) are jointly meshed with the main speed reduction gear (112).

3. The dual-motor main and auxiliary box power assembly as claimed in claim 2, wherein: the first input shaft (140) and the first input shaft gear (141) are an integral gear shaft member, and the second input shaft (150) and the second input shaft gear (151) are an integral gear shaft member.

4. The dual-motor main and auxiliary box power assembly as claimed in claim 1, wherein: the side shaft (130) and the side shaft gear II (132) are integrated gear shaft components.

5. The dual-motor main and auxiliary box power assembly as claimed in claim 1, wherein: the gear shifting combination sleeve (122) is connected with the rear shaft (120) through a spline.

6. The dual-motor main and auxiliary box power assembly as claimed in claim 2, wherein: the gearbox (100) comprises a front shell (101), a main box shell (102) and an auxiliary box shell (103) which are connected in sequence, and two ends of a first input shaft (140) and a second input shaft (150) are respectively installed on the front shell (101) and the main box shell (102) through bearings; two ends of the side shaft (130) are respectively arranged on the main box shell (102) and the auxiliary box shell (103) through bearings; the front shaft (110) is mounted on the front housing (101) and the main case housing (102) through bearings, and the rear shaft (120) is mounted on the sub case housing (103) through bearings.