CN220973892U

CN220973892U - Dual-motor electrically-driven wheeled tractor transmission system

Info

Publication number: CN220973892U
Application number: CN202322902755.8U
Authority: CN
Inventors: 王维军; 徐丽君; 高赛峰; 王春宏; 杨志杰; 王云
Original assignee: Changzhou Dongfeng Agricultural Machinery Group Co ltd
Current assignee: Changzhou Dongfeng Agricultural Machinery Group Co ltd
Priority date: 2023-10-28
Filing date: 2023-10-28
Publication date: 2024-05-17
Anticipated expiration: 2033-10-28

Abstract

The utility model relates to a double-motor electric drive wheel type tractor transmission system, which comprises a motor drive mechanism, a walking transmission mechanism and a PTO transmission mechanism; the motor driving mechanism comprises a motor shell, a PTO motor and a traveling motor, the traveling motor and the PTO motor are arranged in the motor shell, the traveling transmission mechanism comprises a speed change mechanism and a rear axle mechanism, the speed change mechanism comprises a speed change shell, a traveling input shaft, a main reduction driving gear shaft, a traveling high-gear pair and a traveling low-gear pair, the rear axle mechanism comprises a rear axle shell, a main reduction driving gear shaft and a differential mechanism which are arranged on the rear axle shell and meshed with each other, and the PTO transmission mechanism comprises a PTO input shaft, a PTO intermediate shaft, a PTO output shaft, a PTO constant meshing gear pair, a PTO low-gear pair and a PTO high-gear pair. The utility model can shorten the axial space, greatly improve the range of adapting to farm machinery, reduce the manufacturing and using cost and has good economy.

Description

Dual-motor electrically-driven wheeled tractor transmission system

Technical Field

The utility model relates to a double-motor electric drive wheel type tractor transmission system, and belongs to the technical field of wheel type tractor transmission systems.

Background

The wheel tractor is mainly used for field operation, the requirements of wheel tractor wheelbase, total length, turning radius and other whole machine sizes and performances of different areas, different crops and different operation types are different, and therefore products of domestic wheel tractor manufacturers are led to cover various horsepower sections, and different product series are distributed on the same horsepower section to meet market demands. Most of the existing domestic main-pin wheeled tractors are traditional mechanical drive systems, the arrangement of clutches, gearboxes and rear axles is compact, if the sizes of wheelbases and the like are required to be changed on the basis of meeting specific gear numbers, relevant changes can be very large, especially the wheelbases are shortened, and the implementation is basically difficult. The electric drive system adopts an automatic mechanical gearbox, can realize stepless speed change, and provides power for each machine tool through PTO (Power take off) power output mechanisms.

In the existing transmission mechanism of the wheel type tractor, a PTO motor is connected with a PTO transmission box through a PTO output shaft, a traveling motor is connected with a transmission through a traveling motor, the transmission is connected with a rear axle, and power is transmitted to wheels. The PTO motor and the traveling motor are respectively arranged on the frame, and the PTO motor, the traveling motor, the transmission, the rear axle and the PTO transmission case are respectively arranged. Because the walking motor and the PTO motor are arranged on the frame, the working environment of the tractor is poorer, and the motor is easy to fail. On the other hand, because the PTO drive train is typically a set of reduction gear pairs, the PTO motor must be a low speed, low torque motor and therefore costly.

Disclosure of Invention

The utility model aims to provide a double-motor electric drive wheel type tractor transmission system which can shorten the axial space, greatly improve the range of adapting to agricultural machinery and reduce the manufacturing and using cost.

The technical scheme for achieving the purpose is as follows: a dual motor electrically driven wheeled tractor drive train characterized by: comprises a motor driving mechanism, a walking transmission mechanism and a PTO transmission mechanism;

The motor driving mechanism comprises a motor shell, a PTO motor and a traveling motor, wherein the motor shell is arranged on one side of the speed change shell, the traveling motor and the PTO motor are arranged in the motor shell, an output shaft of the traveling motor is connected with a traveling input shaft through a traveling connecting sleeve, and an output shaft of the PTO motor is connected with the PTO input shaft through a PTO connecting sleeve;

The traveling transmission mechanism comprises a speed change shell, a traveling input shaft, a main reduction driving gear shaft, a traveling high-gear pair and a traveling low-gear pair, wherein the other side of the speed change shell is connected to the rear axle shell; the rear axle mechanism comprises a rear axle shell, a main reduction driving gear shaft and a differential mechanism, wherein the main reduction driving gear shaft and the differential mechanism are arranged on the rear axle shell and are meshed with each other, and the differential mechanism is connected with a left half axle and a right half axle which are arranged on the rear axle shell;

The PTO transmission mechanism comprises a PTO input shaft, a PTO intermediate shaft, a PTO output shaft, a PTO constant-meshing gear pair, a PTO low-gear pair and a PTO high-gear pair, wherein the PTO input shaft is arranged on a speed change shell through a bearing, the PTO intermediate shaft is arranged on the speed change shell and a rear axle shell through a bearing, the PTO output shaft is arranged on the rear axle shell through a bearing and extends out of the rear axle shell, the PTO constant-meshing gear pair is arranged on the PTO input shaft and the PTO intermediate shaft, the PTO low-gear pair and the PTO high-gear pair are correspondingly arranged on the PTO intermediate shaft and the PTO output shaft, and a PTO meshing sleeve which is connected on the PTO output shaft in a key manner is used for meshing with the PTO low-gear pair and the PTO high-gear pair and switching.

The walking motor and the PTO motor are arranged in the motor shell, so that the working reliability of the walking motor and the PTO motor can be improved, the axial space is saved to a greater extent, the walking speed change mechanism is simplified, the gear pair of the PTO transmission system is moderately increased by utilizing the axial space, the power output has a plurality of gears, the range of adapting to agricultural machinery is greatly improved, and the use economy and the working efficiency can be improved while the driving comfort of the whole machine is further improved. The transmission system of the wheeled tractor realizes the stepless speed change of walking and PTO, and simultaneously increases the gear pair of the PTO transmission system, and the PTO motor can select a high-speed low-torque motor with lower cost, so that the whole machine has the advantages of double motors and can reduce the manufacturing cost and the use cost.

Drawings

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a drive train of a dual motor electrically driven wheeled tractor according to the present utility model.

Wherein: 1-walking motor, 2-walking connecting sleeve, 3-walking input shaft, 4-walking high-gear driven gear, 5-walking high-gear driving gear, 6-walking meshing sleeve, 7-walking low-gear driven gear, 8-walking low-gear driving gear, 9-main reduction driving gear shaft, 10-right half shaft, 11-differential, 12-PTO output shaft, 13-PTO low-gear driving gear, 14-PTO low-gear driven gear, 15-PTO meshing sleeve, 16-PTO high-gear driven gear, 17-PTO high-gear driving gear, 18-PTO intermediate shaft, 19-left half shaft, 20-rear axle housing, 21-speed change housing, 22-PTO constant-gear driven gear, 23-PTO Chang Niege driving gear, 24-PTO input shaft, 25-PTO connecting sleeve, 26-motor and 27-motor housing.

Detailed Description

As shown in FIG. 1, the transmission system of the dual-motor electrically-driven wheeled tractor comprises a motor driving mechanism, a walking transmission mechanism and a PTO transmission mechanism.

As shown in fig. 1, the motor driving mechanism of the present utility model includes a motor housing 27, a PTO motor 26 and a traveling motor 1, the PTO motor 26 providing power for the implement and the traveling motor 1 providing power for the tractor to travel. The motor housing 27 is arranged on one side of the speed change housing 21, the walking motor 1 and the PTO motor 26 are arranged in the motor housing 27, an output shaft of the walking motor 1 is connected with the walking input shaft 3 through the walking connecting sleeve 2, the walking connecting sleeve 2 is a spline sleeve, and the output shaft of the walking motor 1 and the walking input shaft 3 are connected with the walking connecting sleeve 2 in a key way. Similarly, the output shaft of the PTO motor 26 is connected with the PTO input shaft 24 through the PTO connecting sleeve 25, the PTO connecting sleeve 25 is a spline sleeve, the output shaft of the PTO motor 26 and the PTO input shaft 24 are connected with the PTO connecting sleeve 25 in a key way, and the output shaft of the PTO motor 26 is parallel to the output shaft of the traveling motor 1, so that the axial space can be saved to a greater extent.

As shown in fig. 1, the traveling transmission mechanism of the present utility model comprises a transmission mechanism and a rear axle mechanism, the transmission mechanism comprises a transmission housing 21, a traveling input shaft 3, a main reduction driving gear shaft 9, a traveling high gear pair and a traveling low gear pair, wherein the other side of the transmission housing 21 is connected to a rear axle housing 20, the traveling input shaft 3 is mounted on the transmission housing 21 through a bearing, the main reduction driving gear shaft 9 is mounted on the transmission housing 21 and the rear axle housing 20 through a bearing, and the main reduction driving gear shaft 9 is used as a traveling output shaft, so that the number of components can be reduced, and the connection structure can be simplified. As shown in fig. 1, the traveling high-gear pair and the traveling low-gear pair are correspondingly arranged on the traveling input shaft 3 and the main reduction driving gear shaft 9, the traveling meshing sleeve 6 which is connected with the main reduction driving gear shaft 9 in a key way is used for meshing with the traveling high-gear pair and the traveling low-gear pair and performing gear switching, and the traveling meshing sleeve 6 is controlled to axially move by a shifting fork arranged on a shifting fork shaft in a speed changing shell so as to realize the switching of high traveling speed and low traveling speed. As shown in fig. 1, the traveling high-gear pair comprises a traveling high-gear driving gear 5 and a traveling high-gear driven gear 4, the traveling low-gear pair comprises a traveling low-gear driving gear 8 and a traveling low-gear driven gear 7, the traveling high-gear driving gear 5 and the traveling low-gear driving gear 8 are connected on a traveling input shaft 3 in a key way, the traveling high-gear driving gear 5 and the traveling low-gear driving gear 8 can achieve axial limiting through limiting sleeves, the traveling high-gear driven gear 4 and the traveling low-gear driven gear 7 are mounted on a main reduction driving gear shaft 9 through front shaft sleeves, a traveling meshing sleeve 6 is connected with the main reduction driving gear shaft 9 in a key way and is positioned between the traveling high-gear driven gear 4 and the traveling low-gear driven gear 7, and therefore traveling power high-low two-gear output can be achieved through shifting fork shifting meshing sleeves 6 arranged on a speed change shell.

Referring to fig. 1, the rear axle mechanism of the present utility model includes a rear axle housing 20, and a main reduction driving gear shaft 9 and a differential 11 mounted on the rear axle housing 20 to be engaged with each other, the differential 11 being connected with a left half shaft 19 and a right half shaft 10 mounted on the rear axle housing 20 to transmit traveling power to the right half shaft 10 and the left half shaft 19.

As shown in fig. 1, the PTO transmission mechanism of the present utility model includes a PTO input shaft 24, a PTO intermediate shaft 18, a PTO output shaft 12, a PTO normally engaged gear pair, a PTO low gear pair and a PTO high gear pair, the PTO input shaft 24 is mounted on a transmission housing 21 through bearings, the PTO intermediate shaft 18 is mounted on the transmission housing 21 and a rear axle housing 20 through bearings, the PTO output shaft 12 is mounted on the rear axle housing 20 through bearings and extends out of the rear axle housing 20, the PTO normally engaged gear pair is mounted on the PTO input shaft 24 and the PTO intermediate shaft 18, and the PTO normally engaged gear pair is a PTO normally engaged driving gear mounted on the PTO input shaft 24 and a PTO normally engaged driven gear 22 mounted on the PTO intermediate shaft 18 to achieve reduction and torque increase of power output. As shown in fig. 1, the PTO low gear pair and the PTO high gear pair are correspondingly mounted on the PTO intermediate shaft 18 and the PTO output shaft 12, and the PTO engagement sleeve 15 that is keyed to the PTO output shaft 12 is used to engage with the PTO low gear pair and the PTO high gear pair and perform gear shifting, so that the range of the adapted agricultural implement can be greatly increased by adding the PTO engagement gear pair. As shown in fig. 1, the PTO low gear pair of the present utility model includes a PTO low gear driving gear 13 and a PTO low gear driven gear 14, the PTO high gear pair includes a PTO high gear driving gear 17 and a PTO high gear driven gear 16, the PTO low gear driving gear 13 and the PTO high gear driving gear 17 are connected to a PTO intermediate shaft 18 by a key, the PTO low gear driven gear 14 and the PTO high gear driven gear 16 are mounted on a PTO output shaft 12 by a rear sleeve, a PTO meshing sleeve 15 is connected to the PTO output shaft 12 by a key and is located between the PTO low gear driven gear 14 and the PTO high gear driven gear 16, and the PTO meshing sleeve 15 is shifted by a PTO fork provided on a rear axle housing to move axially to realize high speed power output or low speed power output. The PTO output shaft 12 of the present utility model may be of a split structure, the PTO output shaft 12 having a T-shaped connection end provided outside the rear axle housing 20, and a connection shaft having an interface mounted at the connection end by a fastener, so that connection of different machine bodies can be achieved by replacing the connection shaft.

When the transmission system of the double-motor electric drive wheel type tractor works, as shown in fig. 1, a walking motor 1 is started, an output shaft of the walking motor 1 drives a walking high-gear driving gear 5 and a walking low-gear driving gear 8 to rotate through a walking connecting sleeve 2 and a walking input shaft 3, when a walking meshing sleeve 6 is meshed with a walking high-gear driven gear 4, the power of the walking motor 1 is transmitted to a main reduction driving gear shaft 9 through a walking high-gear driven gear pair, and the main reduction driving gear shaft 9 transmits the power to a right half shaft 10 and a left half shaft 19 through a differential 11 to drive the vehicle to walk; when the walking meshing sleeve 6 is meshed with the walking low-gear driven gear 7, the power of the walking motor 1 is transmitted to the main reduction driving gear shaft 9 through the walking low-gear driven gear pair, and the main reduction driving gear shaft 9 transmits the power to the right half shaft 10 and the left half shaft 19 through the differential 11 to drive the vehicle to walk.

When the PTO motor 26 is started, the power of the PTO motor 26 is transmitted to the PTO input shaft 24 through the PTO connecting sleeve 25, and is transmitted to the PTO intermediate shaft 18 through the normally engaged PTO normally engaged driving gear 23 and the PTO normally engaged driven gear 22, the power output is reduced once and the torque is increased, when the PTO engaging sleeve 15 is engaged with the PTO high-gear driven gear 16, the power on the PTO intermediate shaft 18 is transmitted to the PTO output shaft 12 through the PTO high-gear driving gear 17 and the PTO high-gear driven gear 16, and the high-gear power output is realized; when the PTO meshing sleeve 15 is meshed with the PTO low-gear driven gear 14, power on the PTO intermediate shaft 18 is transmitted to the PTO output shaft 12 through the PTO low-gear driving gear 13 and the PTO low-gear driven gear 14, and low-gear power output is achieved.

Claims

1. A dual motor electrically driven wheeled tractor drive train characterized by: comprises a motor driving mechanism, a walking transmission mechanism and a PTO transmission mechanism;

The motor driving mechanism comprises a motor shell (27), a PTO motor (26) and a traveling motor (1), wherein the motor shell (27) is arranged on one side of the speed change shell (21), the traveling motor (1) and the PTO motor (26) are arranged in the motor shell (27), an output shaft of the traveling motor (1) is connected with a traveling input shaft (3) through a traveling connecting sleeve (2), and an output shaft of the PTO motor (26) is connected with a PTO input shaft (24) through a PTO connecting sleeve (25);

The traveling transmission mechanism comprises a speed change mechanism and a rear axle mechanism, the speed change mechanism comprises a speed change shell (21), a traveling input shaft (3), a main reduction driving gear shaft (9), a traveling high-gear pair and a traveling low-gear pair, the other side of the speed change shell (21) is connected to a rear axle shell (20), the traveling input shaft (3) is arranged on the speed change shell (21) through a bearing, the main reduction driving gear shaft (9) is arranged on the speed change shell (21) and the rear axle shell (20) through a bearing, the traveling high-gear pair and the traveling low-gear pair are correspondingly arranged on the traveling input shaft (3) and the main reduction driving gear shaft (9), and a traveling meshing sleeve (6) which is connected to the main reduction driving gear shaft (9) in a key manner is used for meshing with the traveling high-gear pair and the traveling low-gear pair and switching gears; the rear axle mechanism comprises a rear axle shell (20), a main reduction driving gear shaft (9) and a differential mechanism (11) which are arranged on the rear axle shell (20) and meshed with each other, and the differential mechanism (11) is connected with a left half shaft (19) and a right half shaft (10) which are arranged on the rear axle shell (20);

The PTO transmission mechanism comprises a PTO input shaft (24), a PTO intermediate shaft (18), a PTO output shaft (12), a PTO constant-meshed gear pair, a PTO low-gear pair and a PTO high-gear pair, wherein the PTO input shaft (24) is arranged on a speed change shell (21) through a bearing, the PTO intermediate shaft (18) is arranged on the speed change shell (21) and a rear axle shell (20) through a bearing, the PTO output shaft (12) is arranged on the rear axle shell (20) through a bearing and extends out of the rear axle shell (20), the PTO constant-meshed gear pair is arranged on the PTO input shaft (24) and the PTO intermediate shaft (18), the PTO low-gear pair and the PTO high-gear pair are correspondingly arranged on the PTO intermediate shaft (18) and the PTO output shaft (12), and a PTO meshing sleeve (15) gear pair which is connected on the PTO output shaft (12) through a key is used for meshing with and switching.

2. A dual motor electrically driven wheeled tractor drive train as claimed in claim 1, wherein: an output shaft of the PTO motor (26) is arranged in parallel with an output shaft of the traveling motor (1).

3. A dual motor electrically driven wheeled tractor drive train as claimed in claim 1, wherein: the walking connecting sleeve (2) is a spline sleeve, and an output shaft of the walking motor (1) and the walking input shaft (3) are connected with the walking connecting sleeve (2) in a key way.

4. A dual motor electrically driven wheeled tractor drive train as claimed in claim 1, wherein: the PTO connecting sleeve (25) is a spline sleeve, and an output shaft of the PTO motor (26) and the PTO input shaft (24) are connected with the PTO connecting sleeve (25) in a key mode.

5. A dual motor electrically driven wheeled tractor drive train as claimed in claim 1, wherein: the high-speed gear pair comprises a high-speed driving gear (5) and a high-speed driven gear (4), the low-speed gear pair comprises a low-speed driving gear (8) and a low-speed driven gear (7), the high-speed driving gear (5) and the low-speed driving gear (8) are connected to a driving input shaft (3) in a key manner, the high-speed driven gear (4) and the low-speed driven gear (7) are mounted on a main reduction driving gear shaft (9) through a front shaft sleeve, and a driving meshing sleeve (6) is connected with the main reduction driving gear shaft (9) in a key manner and is located between the high-speed driven gear (4) and the low-speed driven gear (7).

6. A dual motor electrically driven wheeled tractor drive train as claimed in claim 1, wherein: the power take-off (PTO) low-gear pair comprises a PTO low-gear driving gear (13) and a PTO low-gear driven gear (14), the PTO high-gear pair comprises a PTO high-gear driving gear (17) and a PTO high-gear driven gear (16), the PTO low-gear driving gear (13) and the PTO high-gear driving gear (17) are connected to a PTO intermediate shaft (18) in a key mode, the PTO low-gear driven gear (14) and the PTO high-gear driven gear (16) are installed on a PTO output shaft (12) through a rear shaft sleeve, and a PTO meshing sleeve (15) is connected to the PTO output shaft (12) in a key mode and located between the PTO low-gear driven gear (14) and the PTO high-gear driven gear (16).