CN212251075U

CN212251075U - Tractor electric control gear engaging control mechanism

Info

Publication number: CN212251075U
Application number: CN202021299770.8U
Authority: CN
Inventors: 王雷; 施炜东
Original assignee: Jiangsu World Agricultural Machinery Co Ltd
Current assignee: Jiangsu World Agricultural Machinery Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2020-12-29
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses an automatically controlled control mechanism that puts into gear of tractor, including automatically controlled handle, control system, motor, cam disc, shift assembly, sensor, automatically controlled handle the motor respectively with control system signal connection, the cam disc with the motor is connected, shift assembly with the cam disc is connected, the sensor install in on the cam disc, the sensor with control system signal connection. The utility model has the advantages that: the automatic gear engaging of the tractor gear shifting assembly is realized by arranging the electric control handle and the control system and matching the motor and the cam disc, the gear shifting operation is simple and convenient due to the electric control structure, the control part is in a module form, the mounting structure is simple, the reliability is high, the mounting and maintenance cost is low, data interaction is carried out among the modules, and the design idea of modern agricultural machinery is met.

Description

Tractor electric control gear engaging control mechanism

Technical Field

The utility model belongs to the technical field of the agricultural production equipment and specifically relates to an automatically controlled gear control mechanism that puts into gear of tractor.

Background

The existing tractor generally adopts a mechanical or hydraulic gear engaging mechanism, which mainly comprises an operating lever, a box body, a shifting lever, a shifting block, a shifting fork shaft, a shifting fork, a steel ball and other parts, wherein the operating lever is operated to drive the shifting block and the shifting fork to move, so that the shifting fork shaft is driven to translate to enable a groove part on the shifting fork shaft to translate to the lower part of the steel ball, the steel ball enters the groove under the pressure action of a spring on the box body, and gear engaging is completed. The gear engaging structure is complex to operate, difficult to engage and high in labor intensity of workers, and does not accord with the development idea of modern agricultural machinery.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in view of the above problems, the present invention provides an electric control gear engaging control mechanism for a tractor, which is more simple, practical and reliable in operation.

The technical scheme is as follows: the utility model provides an automatically controlled gear control mechanism that puts into gear of tractor, includes automatically controlled handle, control system, motor, cam disc, the subassembly of shifting, sensor, automatically controlled handle the motor respectively with control system signal connection, the cam disc with the motor is connected, the subassembly of shifting with the cam disc is connected, the sensor install in on the cam disc, the sensor with control system signal connection.

The electric control handle is provided with an up-down gear button, the electric control button is operated to send a signal for increasing or decreasing gears to the control system, the control system sends an instruction to the motor, the motor drives the cam disc to move, so that the gear shifting assembly is engaged again to realize gear replacement, and the sensor is used for feeding back a signal to the control system.

Further, control system includes controller changer, driver, the controller with driver signal connection, the controller with be connected with between the driver the changer, automatically controlled handle the sensor respectively with controller signal connection, the motor with driver signal connection.

Further, the controller is a PLC controller or a vehicle-mounted special controller.

Further, the subassembly of shifting is including installing in inside driving lever, shifting block, declutch shift shaft, steel ball, elastic component, shift fork of box, the one end of driving lever with the cam disc is connected, and the other end passes through the shifting block with the declutch shift shaft is connected perpendicularly, a plurality of recesses have been seted up along its axial on the outer peripheral face of declutch shift shaft, the one end of elastic component with the inner wall of box is fixed, the other end with the steel ball is connected, the steel ball passes through the elastic component card is located one of them in the recess, the shift fork with the one end of declutch shift shaft is connected.

Further, the elastic member is a spring.

Furthermore, the mechanism also comprises an instrument panel, and the instrument panel is in signal connection with the control system.

Preferably, the motor is a servo motor.

Most preferably, the sensor is an angle sensor.

Has the advantages that: compared with the prior art, the utility model has the advantages that: the automatic gear engaging of the tractor gear shifting assembly is realized by arranging the electric control handle and the control system and matching the motor and the cam disc, the gear shifting operation is simple and convenient due to the electric control structure, the control part is in a module form, the mounting structure is simple, the reliability is high, the mounting and maintenance cost is low, data interaction is carried out among the modules, and the design idea of modern agricultural machinery is met.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be further elucidated with reference to the drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.

An electric control gear engaging control mechanism of a tractor is shown in figure 1, and comprises an electric control handle 1, a control system 2, a motor 3, a cam disc 4, a gear shifting assembly 5, a sensor 6 and an instrument panel 7.

The control system 2 comprises a controller 21, a transmitter 22 and a driver 23, the controller 21 can be a PLC (programmable logic controller) or a vehicle-mounted special controller, the controller 21 is connected with the driver 23, the transmitter 22 is connected between the controller 21 and the driver 23, the electric control handle 1 is in signal connection with the controller 21, the electric control handle 1 is provided with a shift up-down button, the motor 3 is in signal connection with the driver 23, and the motor 3 can be a servo motor.

The cam disc 4 generally comprises a cam, a driven part and a frame, a motor shaft of the motor 3 is connected with the cam of the cam disc 4, the gear shifting assembly 5 is connected with the driven part of the cam disc 4, the gear shifting assembly 5 can be a plurality of according to the number of gears of the tractor, the gear shifting assembly 5 comprises a shifting rod 51, a shifting head 52, a shifting fork shaft 53, a steel ball 54, an elastic part 55 and a shifting fork 56, the shifting rod 51 is installed inside a box body, one end of the shifting rod 51 is connected with the driven part of the cam disc 4, the other end of the shifting rod is vertically connected with the shifting fork shaft 53 through the shifting head 52, a plurality of grooves 531 are formed in the outer peripheral surface of the shifting fork shaft 53 along the axial direction of the shifting fork shaft, one end of the elastic part 55 is fixed with the inner wall of the box body, the other end of the elastic part 54.

The sensor 6 is an angle sensor, the sensor 6 is arranged on a cam of the cam disc 4, the sensor 6 is in signal connection with the controller 21, the sensor 6 feeds back an angle signal of the cam disc 4 to the controller 21, and the instrument panel 7 is in signal connection with the controller 21.

In the working process, the motor is controlled to rotate to drive the cam disc to rotate by operating the shift up-down button on the electric control handle, so that the shift rod and the shift fork shaft are controlled to act to realize the control of gear shifting.

After the tractor is electrified, the motor automatically rotates to a neutral position, and gear information can be displayed through the instrument panel. After an upshift or downshift button of the electric control handle is pressed, the controller receives a signal and transmits a control signal to the driver, the driver drives the motor to rotate, the rotating direction and angle are determined by the pressed key and the gear at the moment, and the angle value during rotation is accurately fed back to the controller by the sensor and can be displayed in real time through the instrument panel.

When the motor controls the cam disc to rotate, if the conditions of difficult gear engagement and gear engagement not in place occur, the motor can rotate reversely for a certain angle and then rotate towards the target gear, and if the gear engagement still cannot be successfully achieved after multiple attempts, a feedback signal is fed back to display an alarm signal through the instrument panel.

When the gear is shifted, the steel ball is shifted out of the original groove and re-enters another groove for clamping under the translation of the shifting fork shaft.

In addition, in order to accurately know whether the gear is engaged or not, besides the judgment of the sensor on the cam disc, the positions of the shifting fork shaft and the steel ball also need to be judged, so that the possibility of the gear engagement completion when the cam disc rotates to a certain angle interval can be judged through the sensor, and the judgment is carried out by combining the characteristic of the sudden change of the load current of the motor. When the gear is not finished, the shifting fork shaft has certain friction force to the shifting fork shaft due to the steel ball in the translation process, so that the load is increased, the input current of the driver is increased, and the input current of the driver is suddenly reduced when the steel ball is pushed into the groove of the shifting fork shaft and the load suddenly drops. At the moment, the transient change of the current is transmitted to the controller through the transmitter and is displayed through the instrument panel, so that whether the gear is engaged or not can be judged under the condition that other sensors are not arranged in the gearbox body.

The whole control system adopts a CAN bus structure, so that the wiring quantity is greatly reduced, and the reliability is improved. The controller, the driver and the instrument panel transmit data through the CAN bus, so that the data interactivity is improved. Through data transmission, the work of each control is coordinated and ordered.

Through setting up automatically controlled handle and control system, cooperation motor and cam disc realize tractor gearshift subassembly's automation and put into gear, automatically controlled structure makes the gear shift control simple and convenient, and control portion is the module form, and mounting structure is simple, and the reliability is high, and the installation maintenance cost is low, carries out data interaction between the module, accords with modern agricultural machine's design thought, has realized tractor automatically controlled formula and has put into gear, makes tractor put into gear operation easy operation more, practical, reliable advanced, has effectively reduced the labour.

Claims

1. The utility model provides an automatically controlled gear control mechanism that puts into gear of tractor which characterized in that: including automatically controlled handle (1), control system (2), motor (3), cam disc (4), the subassembly of shifting (5), sensor (6), automatically controlled handle (1) motor (3) respectively with control system (2) signal connection, cam disc (4) with motor (3) are connected, the subassembly of shifting (5) with cam disc (4) are connected, sensor (6) install in on cam disc (4), sensor (6) with control system (2) signal connection.

2. The electric control gear engaging control mechanism of the tractor according to claim 1, characterized in that: control system (2) include controller (21), changer (22), driver (23), controller (21) with driver (23) signal connection, controller (21) with be connected with between driver (23) changer (22), electric control handle (1) sensor (6) respectively with controller (21) signal connection, motor (3) with driver (23) signal connection.

3. The electric control gear engaging control mechanism of the tractor according to claim 2, characterized in that: the controller (21) is a PLC controller or a vehicle-mounted special controller.

4. The electric control gear engaging control mechanism of the tractor according to claim 1, characterized in that: the gear shifting assembly (5) comprises a shifting lever (51), a shifting head (52), a shifting fork shaft (53), a steel ball (54), an elastic piece (55) and a shifting fork (56), wherein the shifting lever (51) is installed inside the box body, one end of the shifting lever (51) is connected with the cam disc (4), the other end of the shifting lever passes through the shifting head (52) and the shifting fork shaft (53) are perpendicularly connected, a plurality of grooves (531) are formed in the outer peripheral surface of the shifting fork shaft (53) along the axial direction of the shifting fork shaft, one end of the elastic piece (55) is fixed to the inner wall of the box body, the other end of the elastic piece is connected with the steel ball (54), the steel ball (54) passes through the elastic piece (55) which is clamped in one of the grooves (531), and the shifting fork (56) is connected with.

5. The electric control gear engaging control mechanism of the tractor according to claim 4, wherein: the elastic piece (55) is a spring.

6. The electric control gear engaging control mechanism of the tractor according to claim 1, characterized in that: the device also comprises an instrument panel (7), wherein the instrument panel (7) is in signal connection with the control system (2).

7. The electric control gear engaging control mechanism of the tractor according to claim 1, characterized in that: the motor (3) is a servo motor.

8. The electric control gear engaging control mechanism of the tractor according to claim 1, characterized in that: the sensor (6) is an angle sensor.