CN212242970U

CN212242970U - Tractor safety device

Info

Publication number: CN212242970U
Application number: CN202020532208.9U
Authority: CN
Inventors: 朱路生; 徐敏雅; 荣斌
Original assignee: Jiangsu Polytechnic College of Agriculture and Forestry
Current assignee: Jiangsu Polytechnic College of Agriculture and Forestry
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-12-29
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a tractor safety protection device, which mainly comprises a seat switch, a power output shaft rotating speed sensor, a controller and a control relay; the seat switch, the power output shaft rotating speed sensor and the control relay are respectively connected with the controller; the control relay is respectively connected with the engine computer and the oil nozzle; the seat switch and the output shaft rotating speed sensor of the utility model have simple structure and easy installation; the controller is adopted for control, so that the response is sensitive, safe and reliable; the design that the seat switch is arranged on the support of the driver seat is adopted, so that the damage caused by the irregular operation of the driver is avoided.

Description

Tractor safety device

Technical Field

The utility model relates to a safety device especially relates to a tractor safety device.

Background

The existing tractor driver protection device mainly prevents the tractor from causing driver damage when rolling. The main types are the following:

(1) two-column type rolling protection device

The main body part of the two-column type rolling protection device is provided with a U-shaped frame, and the U-shaped frame consists of two upright columns. The U-shaped frame is connected with the tractor body by bolts. There are two-post roll guards mounted behind the driver's seat, called rear-mounted. Some are installed in front of the driver's seat and are called front-mounted type. The two-column type rolling protection device is widely applied to small and medium-sized tractors, and can effectively reduce the damage of drivers when the tractors turn over.

(2) Safety protection type cab

The safety protection type cab comprises a frame of the cab consisting of four or six upright posts, and a covering piece is arranged outside the frame to form a closed space. Some of the cabs are directly connected with the frame, and some cabs are connected with the frame through a damping device. The safety protection type cab not only can play a passive protection role when the tractor turns over, but also can play an active protection role.

(3) Driver seat safety belt

The existing two-point safety belt is mainly adopted, one end of the two-point safety belt is fixed on a seat, and the other end of the two-point safety belt is connected through a buckle, so that the displacement of a driver when the tractor turns over is restrained, and the driver is prevented from being damaged due to contact with a tractor part or the ground.

The device can prevent continuous rolling, reduce rolling angle, ensure that the driver has enough safe space and restricts the displacement of the driver when the tractor turns over, reduce the injury that the driver received, but can not protect the driver and receive the damage because of operating the machines and tools nonstandard.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to solve the problems existing in the prior art, the utility model provides a tractor safety device which avoids the driver to operate irregularly and receive damage.

The technical scheme is as follows: the safety protection device of the utility model mainly comprises a seat switch, a power output shaft rotation speed sensor, a controller and a control relay; the seat switch, the power output shaft rotating speed sensor and the control relay are respectively connected with the controller; and the control relay is respectively connected with the engine computer and the oil nozzle.

The seat switch is mounted on the driver seat support, and the driver seat can compress the seat switch.

The power output shaft sensor is arranged on a fixed support of the output shaft accessory, and the grating of the power output shaft sensor is arranged on the power output shaft.

The controller and the control relay are installed on a waterproof position on the tractor, and the control relay is connected on a negative electrode line of the oil nozzle in series.

The controller controls the relay to work or be disconnected through signals provided by the power output shaft detection sensor and the seat switch.

Has the advantages that: compared with the prior art, the beneficial effects of the utility model are as follows: 1. the seat switch and the output shaft rotating speed sensor are simple in structure and easy to install; 2. the controller is adopted for control, so that the response is sensitive, safe and reliable; 3. the design that the seat switch is arranged on the support of the driver seat is adopted, so that the damage caused by the irregular operation of the driver is avoided.

Drawings

FIG. 1 is a schematic view of the general structure of the present invention;

fig. 2 is a schematic view of a seat switch of the present invention;

FIG. 3 is a schematic diagram of a rotational speed sensor of a power output shaft according to the present invention;

fig. 4 is a schematic diagram of the controller of the present invention;

fig. 5 is a schematic diagram of the control relay of the present invention.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the drawings and the detailed description.

Fig. 1 is a schematic view of the general structure of the present invention. The power supply of the controller 3 is connected to the ON position of the ignition switch, and the voltage is the battery voltage. The seat switch 1 can be installed on a driver seat bracket by adopting bolt connection, when a driver sits down, the seat switch 1 can be ensured to be compressed by the seat, and when the driver leaves the seat, the seat switch 1 can be restored to an initial state; the seat switch 1 may be directly connected to the controller 3. The power output shaft rotating speed sensor 2 is arranged on a fixed support of an output shaft accessory, and the grating of the power output shaft rotating speed sensor 2 is arranged on the power output shaft, so that the power output shaft can be arranged on the existing power output shaft in a welding mode, and the stability, reliability and no looseness of the power output shaft are ensured. The controller 3 and the control relay 4 are installed at a position where the tractor is well waterproof. When the control relay is installed, two ends of a contact of the control relay 4 are connected in series on a negative pole line of the oil injector 6.

FIG. 4 is a schematic diagram of a controller, wherein a DIP-40 single chip microcomputer is selected; the pin 40 supplies power to the controller and four coils of the control relay 4, is connected to the ON gear position of the ignition switch and is connected through a bolt. The seat switch 1 is connected with a second pin and a third pin of the controller, the power output shaft rotating speed sensor 2 is respectively connected with a pin 11, a pin 12, a pin 13 and a pin 14, and a pin 20 is grounded. The bonding of the four control relays 4 are respectively connected with the pin 36, the pin 31, the pin 26 and the pin 24 of the controller 4. The remaining two ends of the control relay 4 are contacts which are connected in series with the negative electrode of the oil injector 6 during installation. The original negative pole of the oil injector 6 is cut off, and then two ends of the contact of the control relay 4 are connected to the negative pole.

If the machine tool hung on the tractor is driven by the power output shaft, the power output shaft rotating speed sensor 2 judges whether the power output shaft rotates or not by detecting the rotating speed. When the machine is abnormal when working, if the driver leaves the seat to check the machine without cutting off the power of the output shaft, the circuit of the seat switch 1 is broken, and the driver is judged to leave the seat. At this time, the controller 3 judges that the power output of the engine needs to be cut off according to signals of the power output shaft rotating speed sensor 2 and the driver seat switch 1, provides a control signal for a coil of the control relay 4, controls the relay 4 to work, and cuts off a circuit of an oil injector 6 of the engine, so that the engine is flamed out, and the power output shaft stops rotating. If the power output shaft does not rotate, the engine cannot be shut down regardless of whether the driver leaves the seat.

Claims

1. The utility model provides a tractor safety device which characterized in that: the device mainly comprises a seat switch (1), a power output shaft rotating speed sensor (2), a controller (3) and a control relay (4); the seat switch (1), the power output shaft rotating speed sensor (2) and the control relay (4) are respectively connected with the controller (3); and the control relay (4) is respectively connected with the engine computer (5) and the oil nozzle (6).

2. A tractor safety guard according to claim 1, characterised in that the seat switch (1) is mounted on a driver's seat bracket, which may compress the seat switch (1).

3. A tractor safety guard according to claim 1, characterised in that the pto shaft speed sensor (2) is mounted on a fixed bracket of an output shaft attachment, the grating of the pto shaft speed sensor (2) being mounted on the pto shaft.

4. The tractor safety guard according to claim 1, characterized in that the controller (3) and the control relay (4) are installed in a waterproof position on the tractor, and the control relay (4) is connected in series to the negative line of the oil nozzle (6).

5. The tractor safety guard according to claim 1, characterized in that the controller (3) operates the control relay (4) through signals provided by the power output shaft speed sensor (2) and the seat switch (1).