CN213920686U

CN213920686U - Electric tractor and power device thereof

Info

Publication number: CN213920686U
Application number: CN202022111603.2U
Authority: CN
Inventors: 洪高瞻; 陈美军; 莫川一
Original assignee: Taizhou Meigaosheng Electronic Technology Co ltd
Current assignee: Taizhou Meigaosheng Electronic Technology Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-08-10
Anticipated expiration: 2030-09-23

Abstract

The application relates to an electric tractor, which comprises a frame, a power device, a clutch device and wheels; the power device comprises a main motor, a hydraulic pump and a controller; one end of a motor shaft of the main motor is connected with the clutch device, the other end of the motor shaft is connected with the hydraulic pump, and a liquid outlet of the hydraulic pump is communicated with the switch electromagnetic valve; the clutch device and the switch electromagnetic valve are electrically connected to the control. The power output of the main motor is controlled through the controller, and the effect that the wheels are driven to rotate and the high-pressure oil is supplied to the wheels to independently operate is achieved.

Description

Electric tractor and power device thereof

Technical Field

The application relates to the field of tractors, in particular to an electric tractor and a power device thereof.

Background

Tractors are self-propelled power machines used to tow and drive work machines to perform various mobile operations. In agricultural production, tractors are the primary power machines.

The tail part of the tractor is often provided with a traction device, and the tractor can be used for dragging agricultural equipment such as land leveling machinery, ploughing ploughs, rice transplanters, seeding and combine harvesters according to different operation requirements.

In view of the above-mentioned related technologies, the inventor believes that the tractor used in agricultural production in our country is still mainly a traditional type fuel oil tractor, which works in a low-speed and high-torque area with high power in most time periods, so that the traditional fuel oil tractor has a high energy consumption rate and poor emission performance, and causes many damages to ecology, resources and environment.

SUMMERY OF THE UTILITY MODEL

In order to reduce damage to ecology, resources and environment, the application provides an electric tractor and a power device thereof.

In a first aspect, the present application provides a power device, which adopts the following technical solutions:

a power plant for use on an electric tractor comprising:

the main motor is provided with a motor shaft, and two ends of the motor shaft are used for outputting power; and

the hydraulic pump is provided with an input shaft, a liquid inlet and a liquid outlet, and the input shaft of the hydraulic pump is connected to one end of the motor shaft.

By adopting the technical scheme, the main motor is used as a driving source and is used for outputting power so as to drive wheels of the tractor to rotate; meanwhile, the main motor is used for driving the hydraulic pump to work and providing high-pressure oil which can be used for supplying a traction device, hydraulic power steering, hydraulic power braking and the like.

Optionally, the method further includes:

a controller electrically connected to the main motor and controlling a rotation speed of the main motor; and

the switch electromagnetic valve is communicated with a liquid inlet of the hydraulic pump;

the controller is also electrically connected to the switch solenoid valve to realize the on-off of the liquid inlet of the hydraulic pump.

By adopting the technical scheme, the controller is utilized to control the rotating speed of the main motor, so that the running speed of the tractor is controlled; meanwhile, the controller cuts off the liquid inlet of the hydraulic pump through the switch electromagnetic valve, at the moment, the main motor still drives the hydraulic pump to rotate, but the hydraulic pump stops outputting high-pressure oil, the working state of the hydraulic pump is controlled, and whether the high-pressure oil is supplied or not is controlled when the main motor keeps rotating.

Optionally, the method further includes:

the mounting frame is used for mounting the main motor, the hydraulic pump and the controller;

the mounting bracket is used for being connected to a tractor.

Through adopting above-mentioned technical scheme, utilize the mounting bracket to connect into a whole with main motor, hydraulic pump, switch solenoid valve and controller, be convenient for hoist to the frame together.

In a second aspect, the present application provides an electric tractor, which adopts the following technical scheme:

an electric tractor, includes frame, wheel and draw gear, still includes:

the battery is arranged on the frame;

the end, far away from the hydraulic pump, of a motor shaft of the main motor is connected to a wheel; and

the oil tank is arranged on the frame and used for storing hydraulic oil, an oil outlet and an oil return port are formed in the oil tank, and the oil outlet is communicated to the switch electromagnetic valve.

By adopting the technical scheme, the wheels are driven to rotate by the main motor, so that the tractor runs; meanwhile, the main motor drives the hydraulic pump to operate, and the control of the switching electromagnetic valve by the matching controller is realized to control whether the high-pressure oil is supplied or not.

Optionally, the method further includes:

the display device is arranged on the frame;

the controller is also electrically connected to the display device to display the working state of the tractor through the display device.

Through adopting above-mentioned technical scheme, be used for showing the real-time status of tractor on the display device, if: the remaining battery capacity, the vehicle speed, whether the high-pressure oil is supplied or not (on or off of a switch solenoid valve), the working state of the traction device and the like, so that a driver can know the state of the tractor conveniently.

Optionally, the method further includes:

and the gearbox is arranged between a motor shaft of the main motor and the wheels.

By adopting the technical scheme, the rotating speed of the main motor is adjusted within a certain range, the rotating speed range is enlarged by the gearbox, the speed of the tractor is adjusted, the rotating speed of the hydraulic pump is guaranteed to be within a reasonable range, and the service life of the hydraulic pump is guaranteed.

Optionally, the method further includes:

the clutch device is arranged between a motor shaft of the main motor and wheels;

the controller is also electrically connected to the clutch device to effect disconnection of power transmission between the main motor and the wheels.

Through adopting above-mentioned technical scheme, utilize controller cooperation clutch, realize cutting off the power transmission between main motor and the wheel alone, at cooperation on-off solenoid valve, can realize following four kinds of state between the switching:

firstly, the driving force of a main motor is transmitted to wheels, but no high-pressure oil is supplied;

secondly, the main motor drives the hydraulic pump to operate and outputs high-pressure oil, but the driving force is not transmitted to wheels;

thirdly, the driving force of the main motor is transmitted to the wheels, the hydraulic pump is driven to operate, and high-pressure oil is output;

and fourthly, the driving force of the main motor is not transmitted to the wheels, and no high-pressure oil is supplied.

Optionally, a liquid outlet of the hydraulic pump is communicated with a plurality of high-pressure oil pipes, and one of the high-pressure oil pipes is communicated with the traction device.

By adopting the technical scheme, the main motor drives the hydraulic pump to operate and output high-pressure oil which can be supplied to the traction device so as to realize the traction of agricultural equipment such as land leveling machinery, ploughing ploughs, rice transplanters, seeding and combine harvesters.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the controller controls the rotating speed of the main motor, so that the running speed of the tractor is controlled; meanwhile, the controller controls whether the high-pressure oil is supplied or not when the main motor keeps rotating by switching on and off the electromagnetic valve;

2. the controller is matched with the clutch device to realize the independent cutting off of the power transmission between the main motor and the wheels, and the switching between the following four states can be realized by matching with the switch electromagnetic valve:

thirdly, the driving force of the motor is transmitted to the wheels, the hydraulic pump is driven to operate, and high-pressure oil is output;

Drawings

Fig. 1 is a schematic view of the overall structure of a power plant.

Fig. 2 is an exploded view of the power plant.

Fig. 3 is a schematic view of the overall structure of the electric tractor.

Fig. 4 is a schematic view of the power plant mounted on the electric tractor.

Fig. 5 is a schematic view of the mounting of the clutch device on the electric tractor.

Fig. 6 is a schematic view showing the installation of the oil tank and the battery.

Fig. 7 is a schematic view of the overall structure of the clutch device.

Fig. 8 is an exploded view of the structure of the clutch device.

Fig. 9 is a schematic view of the structure of the drive plate.

Fig. 10 is a schematic view of the internal structure of the clutch device.

Description of reference numerals: 11. a mounting frame; 111. a support plate; 112. a mounting cavity; 12. a main motor; 13. a hydraulic pump; 131. a liquid inlet pipe; 132. a high pressure oil pipe; 14. switching on and off the electromagnetic valve; 15. a controller; 16. a housing; 2. a frame; 21. a machine cover; 22. a protective cover; 3. a wheel; 4. a traction device; 5. a clutch device; 51. a housing; 511. a barrel; 512. a base plate; 513. a ring groove; 52. a first shaft; 53. a second shaft; 54. a drive disc; 541. clamping teeth; 55. a baffle ring; 56. a spring; 57. a butting tray; 571. a card slot; 58. an oil passage; 59. an electromagnetic valve; 6. an oil tank; 61. an oil return header pipe; 62. an oil return branch pipe; 7. a display device; 71. a display; 8. a battery.

Detailed Description

The present application is described in further detail below with reference to figures 1-10.

Referring to fig. 1, the present embodiment discloses a power plant including a mounting frame 11, a main motor 12, and a hydraulic pump 13.

Referring to fig. 1 and 2, the mounting bracket 11 is used for connecting the main motor 12 and the hydraulic pump 13, in this embodiment, the mounting bracket 11 includes four support plates 111, the four support plates 111 are connected at their heads to form a mounting cavity 112, and the mounting cavity 112 penetrates through the mounting bracket 11; the main motor 12 is arranged in the mounting cavity 112, the axial direction of the motor shaft of the main motor 12 is parallel to the penetrating direction of the mounting cavity 112, and two ends of the motor shaft of the main motor 12 extend out for outputting power; the hydraulic pump 13 is also disposed in the mounting cavity 112, and an input shaft of the hydraulic pump 13 is connected to one end of the motor shaft for receiving power.

Referring to fig. 2, the hydraulic pump 13 has a liquid outlet and a liquid inlet, and the liquid inlet of the hydraulic pump 13 is communicated with a liquid inlet pipe 131. The power plant also includes an on-off solenoid valve 14 and a controller 15. The switch electromagnetic valve 14 is communicated with the liquid inlet pipe 131; the controller 15 is disposed on the mounting frame 11, and the controller 15 is electrically connected to the on-off solenoid valve 14 to control the working state of the on-off solenoid valve 14, so as to control the on/off of the liquid inlet pipe 131.

Referring to fig. 2, in the present embodiment, the controller 15 is disposed on a side of the supporting plate 111 away from the mounting cavity 112, and the power device further includes a cover 16, wherein the cover 16 is connected to the supporting plate 111 and is configured to cover an outer periphery of the controller 15.

The implementation principle of the power device in the embodiment of the application is as follows: the controller 15 is used for controlling the rotating speed of the main motor 12, so that the running speed of the tractor is controlled; meanwhile, the controller 15 cuts off the liquid inlet of the hydraulic pump 13 by switching the electromagnetic valve 14, at this time, the main motor 12 still drives the hydraulic pump 13 to rotate, but the hydraulic pump 13 stops outputting high-pressure oil, so that the working state of the hydraulic pump 13 is controlled, and whether the high-pressure oil is supplied or not is controlled when the main motor 12 keeps rotating.

The embodiment of the application also discloses an electric tractor.

Example 1

Referring to fig. 3, the electric tractor includes a frame 2, a cover 21, wheels 3, and a traction device 4. The traction device 4 is arranged at the tail part of the frame 2 and can be used for dragging agricultural equipment such as land leveling machinery, ploughing ploughs, rice transplanters, seeding and combine harvesters.

Referring to fig. 4, the above-described power unit is provided at the front upper end of the frame 2 below the cover 21, wherein the cover 16 is located above the mounting frame 11, the lower end of the mounting frame 11 is connected to the frame 2, and the hydraulic pump 13 is located in front of the main motor 12. Meanwhile, a battery 8 is further arranged on the frame 2 and in front of the mounting frame 11, and the battery 8 is used for providing electric energy for the whole vehicle.

Referring to fig. 5, a protective cover 22 is disposed below the frame 2, the protective cover 22 is used for blocking silt and the like, and a clutch device 5 and a transmission (not shown) are further disposed below the frame 2 and in the protective cover 22.

Referring to fig. 4 and 5, a motor shaft of the main motor 12 is connected to the clutch device 5, and then power is transmitted to the wheels 3 through the gearbox, so that the wheels 3 are driven to rotate. Meanwhile, the controller 15 is electrically connected to the clutch device 5 to achieve control of the state of the clutch device 5 to achieve cut-off of power transmission.

In this embodiment, power transmission is realized between the motor shaft of the main motor 12 and the input shaft of the clutch device 5 through a pair of externally engaged gears. In other embodiments, the motor shaft of the main motor 12 may also be coaxially connected to the input shaft of the clutch device 5.

Referring to fig. 6, an oil tank 6 is further disposed on the frame 2 and in front of the mounting frame 11, the oil tank 6 is used for storing hydraulic oil, the oil tank 6 is communicated to a liquid inlet pipe 131 of the hydraulic pump 13, an oil return main pipe 61 is further disposed on the oil tank 6, and the oil return main pipe 61 is communicated with a plurality of oil return branch pipes 62; a plurality of high-pressure oil pipes 132 are communicated with the liquid outlet of the hydraulic pump 13, wherein one high-pressure oil pipe 132 penetrates through the frame 2 and is communicated with the traction device 4, and the corresponding oil return branch pipe 62 is communicated with the traction device 4, so that oil supply to the traction device 4 by the hydraulic pump 13 is realized; meanwhile, the arrangement of the plurality of oil return branch pipes 62 and the plurality of high-pressure oil pipes 132 can supply oil to devices such as hydraulic power steering, hydraulic power braking, hydraulic suspension and the like by using the hydraulic pump 13.

Referring to fig. 3 and 4, the frame 2 is further provided with a seat, a steering wheel and a display device 7, the display device 7 is located right in front of the steering wheel, the display device 7 includes a display 71, and the controller 15 is electrically connected to the display 71 to display status parameters of the tractor in real time, the status parameters include vehicle speed, tire pressure, remaining battery capacity of the battery 8, working state of the main motor 12 and the like, so that a driver can know the working state of the tractor in real time.

The implementation principle of the embodiment 1 is as follows: the clutch device 5 and the on-off electromagnetic valve 14 are controlled by the controller 15, so that the tractor can be switched among the following four working states:

firstly, the driving force of the main motor 12 is transmitted to the wheels 3, but no high-pressure oil is supplied;

secondly, the main motor 12 drives the hydraulic pump 13 to operate and outputs high-pressure oil, but the driving force is not transmitted to the wheels 3;

thirdly, the driving force of the main motor 12 is transmitted to the wheels 3, and drives the hydraulic pump 13 to operate and output high-pressure oil;

fourth, the driving force of the main motor 12 is not transmitted to the wheels 3, and no high-pressure oil is supplied.

Example 2

Referring to fig. 7, the present embodiment is different from embodiment 1 in that the clutch device 5 includes a housing 51, a first shaft 52, and a second shaft 53. One of the first shaft 52 and the second shaft 53 is an input shaft, and the other is an output shaft; in the present embodiment, the first shaft 52 is an input shaft.

Referring to fig. 8, the housing 51 includes a cylindrical body 511 and bottom plates 512 disposed at two axial ends of the cylindrical body 511, the first shaft 52 is coaxially and rotatably connected to and penetrates one of the bottom plates 512, and the first shaft 52 and the housing 51 are axially fixed. A driving disk 54 is coaxially and fixedly connected to one end of the first shaft 52 extending into the cylinder 511.

Referring to fig. 8, the second shaft 53 is coaxially and rotatably connected to and penetrates the other bottom plate 512, and a stopper ring 55, a spring 56, and a contact disc 57 are sequentially provided along the axial direction on the outer periphery of one end of the second shaft 53 extending into the cylinder 511. The retainer ring 55 is fixedly connected to the second shaft 53; the abutting disc 57 is coaxially and slidably sleeved on the second shaft 53, circumferential fixing and axial sliding are realized between the abutting disc 57 and the second shaft 53 through spline fit, and the spring 56 and the baffle ring 55 are both positioned on one side of the abutting disc 57, which is far away from the driving disc 54; the spring 56 is sleeved on the outer periphery of the second shaft 53 and extends and retracts in the axial direction, one end of the spring 56 abuts against the blocking ring 55, the other end abuts against the abutting disc 57, and the abutting disc 57 abuts against the driving disc 54.

Referring to fig. 8, one end of the driving disc 54 is provided with latch 541 at intervals along the circumferential direction, one end of the abutting disc 57 is correspondingly provided with a slot 571, and the slot 571 is used for being sleeved on the latch 541 and completing power transmission by virtue of extrusion between the latch 541 and the side wall of the slot 571.

Referring to fig. 9 and 10, three latches 541 are provided at intervals at one end of the driving disc 54, when the abutting disc 57 is abutted to the driving disc 54, the positions of the latches 541 are matched with the slots 571 to form an oil passage 58, an annular groove 513 is provided at the inner periphery of the cylinder 511, the annular groove 513 is communicated to the oil passage 58, the outer periphery of the cylinder 511 is connected with a high-pressure oil pipe 132 and an oil return branch pipe 62, the high-pressure oil pipe 132 and the oil return branch pipe 62 are both communicated to the annular groove 513, the high-pressure oil pipe 132 is provided with an electromagnetic valve 59, the oil return branch pipe 62 is also provided with an electromagnetic valve 59, and the controller 15 is electrically connected to the two electromagnetic valves 59.

The implementation principle of the embodiment 2 is as follows: the controller 15 controls the switch electromagnetic valve 14 to be opened, the hydraulic pump 13 runs normally, and high-pressure oil is supplied through the high-pressure oil pipe 132; at this time, the controller 15 controls the electromagnetic valve 59 on the high-pressure oil pipe 132 to close, and the electromagnetic valve 59 on the oil return branch pipe 62 to open, so that the abutting disc 57 fits the driving disc 54 under the elastic force of the spring 56, and power transmission is realized;

when power needs to be cut off, the controller 15 controls the electromagnetic valve 59 on the high-pressure oil pipe 132 to be opened, the electromagnetic valve 59 on the oil return branch pipe 62 to be closed, the high-pressure oil is injected into the annular groove 513 and the oil duct 58, the hydraulic pump 13 continuously works to supply the high-pressure oil, the high-pressure oil is continuously injected into the oil duct 58, the abutting disc 57 is pushed to overcome the elastic force of the spring 56 to be far away from the driving disc 54, and power is cut off.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A power plant applied to an electric tractor, comprising:

the main motor (12) is provided with a motor shaft, and two ends of the motor shaft are used for outputting power; and

the hydraulic pump (13) is provided with an input shaft, a liquid inlet and a liquid outlet, and the input shaft of the hydraulic pump (13) is connected to one end of the motor shaft.

2. The power plant of claim 1, further comprising:

a controller (15) electrically connected to the main motor (12) and controlling a rotational speed of the main motor (12); and

the switch electromagnetic valve (14) is communicated with a liquid inlet of the hydraulic pump (13);

the controller (15) is also electrically connected with a switch solenoid valve (14) to realize on/off control of a liquid inlet of the hydraulic pump (13).

3. The power plant of claim 2, further comprising:

the mounting frame (11) is used for mounting the main motor (12), the hydraulic pump (13) and the controller (15);

the mounting frame (11) is used for being connected to a tractor.

4. The utility model provides an electric tractor, includes frame (2), wheel (3) and draw gear (4), its characterized in that: further comprising:

a battery (8) arranged on the frame (2);

a power plant according to claim 3, wherein the end of the main motor (12) motor shaft remote from the hydraulic pump (13) is connected to the wheel (3); and

the oil tank (6) is arranged on the frame (2) and used for storing hydraulic oil, an oil outlet and an oil return opening are formed in the oil tank (6), and the oil outlet is communicated to the switch electromagnetic valve (14).

5. The electric tractor according to claim 4, further comprising:

the display device (7) is arranged on the frame (2);

the controller (15) is also electrically connected to the display device (7) to display the working state of the tractor through the display device (7).

6. The electric tractor according to claim 4, further comprising:

and the gearbox is arranged between a motor shaft of the main motor (12) and the wheels (3).

7. The electric tractor according to claim 4, further comprising:

the clutch device (5) is arranged between a motor shaft of the main motor (12) and the wheels (3);

the controller (15) is also electrically connected to the clutch device (5) to effect a cut-off of the power transmission between the main motor (12) and the wheel (3).

8. The electric tractor according to claim 4, wherein: the liquid outlet of the hydraulic pump (13) is communicated with a plurality of high-pressure oil pipes (132), and one high-pressure oil pipe (132) is communicated with the traction device (4).