JPH0529836U - Tractor safety device - Google Patents

Abstract

(57) [Summary] [Purpose] If there is a risk of a tractor falling over, stop the tractor immediately and move it backward to a safe position to reliably prevent the tractor from falling and construct a more safe tractor. The purpose is to [Structure] The tilt angle sensor 1 is provided at an arbitrary position of the tractor T main body.
The controller 2 compares the signal from the tilt angle sensor 1 and the critical fall tilt angle with the controller 2, and immediately before reaching the critical fall tilt angle, the transmission is switched in the direction opposite to the traveling direction of the tractor. is there.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety device for preventing a tractor from falling.

[0002]

[Prior Art]

 Conventionally, a tractor may fall due to derailment or getting into muddy ground while running or working, and a technique for providing a safety frame or the like to ensure the safety of the operator has been publicly known. However, if you fall down, the subsequent processing will be troublesome.Therefore, it has become known that the technology that makes the alarm buzzer sound or stops the engine when the tractor tilts to a tilt angle where there is a risk of falling down is known. -ing

[0003]

[Problems to be solved by the device]

 However, in such a conventional technique, when there is an urgent need, it is often not in time, and it is not possible to reliably prevent a fall, and there is a safety problem. Therefore, the present invention is configured so that when there is a risk of the tractor tipping over, the tractor can be immediately reversed to a safe position, and the tractor can be securely prevented from tipping over, resulting in a safer tractor. The purpose is to configure.

[0004]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention provides an inclination angle sensor at an arbitrary position of the tractor body, compares the signal from the inclination angle sensor with the critical fall inclination angle, and calculates the critical fall angle. The tractor is configured to switch the speed change device in the direction opposite to the traveling direction immediately before the inclination angle is reached.

[0005]

[Action]

 Next, the operation will be described. The tilt angle sensor 1 provided in the main body of the tractor T always detects the tilt angle in all directions, outputs the signal of the tilt angle sensor 1 to the controller 2, and sets the set critical fall tilt angle and tilt angle sensor. The signal of No. 1 is compared and calculated, and when the falling critical tilt angle is reached, the controller 4 operates the actuator 4 provided in the gear shift operation lever 3, and the actuator 4 operates the gear shift operation lever 3 in the direction opposite to the traveling direction. However, when the safety angle is reached, the tractor T is stopped to avoid the risk of falling.

[0006]

【Example】

 Next, an embodiment of the present invention will be described. FIG. 1 is an overall side view of a tractor having a tractor safety device according to the present invention, FIG. 2 is a front view showing a front wheel 14 and a front axle 15, and FIG. 3 is a control block diagram.

The tractor T shown in FIG. 1 is supported by front wheels 14 and 14 and rear wheels 16 and 16 on the front and rear of the machine body. The engine E and the radiator 11 are installed in the hood 10 at the front of the tractor T. A fuel tank 12, a battery 13 and the like are arranged, and a rotary tiller R is attached to the rear part of the tractor T via a three-point link type work implement attachment device. An inclination angle sensor 1 is provided at an arbitrary position of the tractor T, and in the present embodiment, it is arranged on an operation panel portion near the controller 2, and the inclination angle sensor 1 detects front and rear and left and right inclination angles to detect the total angle. It is configured to detect the inclination of the direction and is connected to the controller 2.

The tractor is continuously variable by a hydraulic transmission, or is changed by operating a clutch, and a gear shift lever 3 for changing the speed is provided with an actuator 4 composed of an electric cylinder, a hydraulic cylinder or a pneumatic cylinder. It is connected, and the actuator 4 is controlled by the controller 2 and is normally free during gear shifting. The controller 2 is connected to an alarm buzzer 30 and an alarm lamp 31 on the operation panel 29.

Therefore, when it is about to exceed the preset critical inclination angle of inclination, that is, immediately before passing, the controller 2 sounds the buzzer 30 and lights the lamp 31 to notify the operator of the danger and the actuator. 4 is operated to rotate the speed change lever 3 from the forward drive position to the reverse drive position (in the case of reverse drive, the forward drive position), and the reverse direction is continued until a certain distance or a fall safety angle becomes the fall safety angle. The switching is performed rapidly so that the tractor T stops after that. The stop means is to turn off the engine key switch, release the pressure with a decompression device, stop the engine E by cutting fuel, or brake the brake 20, or use a clutch device. It is possible by cutting.

Further, as shown in FIG. 2, the hydraulic cylinder 6 is provided between the front axle 15 and the frame 19 of the tractor T 1 so as to prevent a fall in a certain range or to allow a large fall critical tilt angle. Is provided so that the signal of the tilt angle sensor 1 is processed by the controller 2 so that the tractor becomes substantially horizontal, or that the tractor rotates in the opposite direction when the tilt approaches a dangerous area. The hydraulic cylinder 6 is controlled to expand and contract. In addition, a balancer 32 is provided at the bottom of the machine body so that the hydraulic cylinder 33 can slide the balancer 32 left and right or forward and backward, and when the tractor is tilted, it can be moved to a higher side to move the center of gravity in a stable direction. It is possible. By rolling this operation finely, rolling correction can be performed, and when approaching the tipping critical tilt angle, it is also possible to forcibly lower the rotary tiller R to lower the center of gravity and make tipping difficult.

Further, a gear is fixed to the steering rod 18 of the steering 17, a gear is fixed to the drive shaft of the motor 5 and meshed, and the steering is enabled by controlling the motor 5. When the detected value of 1 approaches the tipping critical tilt angle, it is possible to operate the motor 5 by the controller 2 to rotate the steering wheel 17 in the escape direction.

Further, outriggers 7 and 7 are disposed on the side of the machine body, and during stationary work or low-speed work, the outriggers 7 and 7 may be protruded laterally and bulged to prevent reaching the critical fall inclination angle. Alternatively, it is also possible to make the outriggers 7 project laterally when approaching the tipping critical tilt angle. However, it is possible to provide a sled body or an auxiliary wheel as an auxiliary body instead of the outrigger 7.

Further, lateral distance sensors 8, 8 are provided on both side surfaces of the tractor T, front distance sensors 9 are provided on both sides of the front end portion, and the front distance sensor 8 is provided by the lateral distance sensors 8. The horizontal height of 16 is detected, and if there is a gutter, the height suddenly rises. The change is calculated by the controller 2, and if the change is large, an alarm is issued and stop or steering is reversed. It is configured to cut in the direction. The front distance sensor 9 can detect the height of a front point, detect an obstacle such as a ridge when the front height is high, and detect a groove or the like when the front distance is low. However, in the case of a slope or the like, the change may be small because it gradually increases or decreases, but the tilt angle sensor 1 detects the tilt of the machine body and thus the fall can be prevented.

Further, as a measure for preventing the tractor T from sinking, strength detecting sensors 24 made of ultrasonic waves or the like are provided on both sides of the front end, and the strength detecting sensors 24 detect the hardness of the ground in front. In addition, an angle sensor 26 is provided on a pivot shaft 28 of a rear cover 27 of the rotary cultivator R, the angle sensor 26 detects the depth of cultivation, and the rotation speed of the PTO shaft is detected by a sensor, so that it is flexible. Since the rotary tiller R goes deep and the number of rotations decreases, the softness of the ground can be detected from the value. Further, the tractor T main body is provided with a downward distance sensor 25 (the side distance sensors 8.8 can be used in common), and the downward distance sensor 25 allows the front wheels 14 and 14 and the rear wheels 16 and 16 to sink. It is also possible to detect the amount and the degree of weakness. By the controller 2 calculating and judging these detected values, the diff lock device is activated before the tractor T becomes in a state where the tractor T cannot go straight, and the plow warning and the weak warning are issued by the alarm buzzer and the alarm lamp. When the vehicle cannot go straight ahead, it is configured to go backward as described above.

In addition, as a fall prevention measure, when the tractor T suddenly starts, the tractor T may get on top or fall due to a wheel loss. Therefore, an automatic acceleration / deceleration function is provided to prevent sudden start. The automatic acceleration / deceleration function can be performed by controlling the actuator 4 and operating the shift operation lever 3. Further, structurally, the deck portion 21 of the tractor T can be easily escaped as a full flat deck, and the operation panel 29 is provided with a tilt angle display device. In order to ensure the safety of the operator even in the event of a fall, the airbag device reduces the damage to the operator, and the seat 22 is equipped with a forced escape device so that the seat 22 is released by a spring, etc. Alternatively, the tractor T after sinking can be pulled up by the winch 23 provided at the front portion.

[0016]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. Immediately, if the tractor has a risk of falling, the tractor can be stopped immediately and the vehicle can be moved backward to a safe position, so it is possible to reliably prevent falling and improve safety. .

[Brief description of drawings]

FIG. 1 is an overall side view of a tractor having a tractor safety device according to the present invention.

FIG. 2 is a front view showing a front wheel 14 and a front axle 15.

FIG. 3 is a control block diagram.

[Explanation of symbols]

 1 Tilt Angle Sensor 2 Controller 3 Shift Lever 4 Actuator 5 Motor 6 Hydraulic Cylinder 7 Outrigger T Tractor R Rotary Tiller

Claims (1)

[Scope of utility model registration request] 1. A tilt angle sensor is provided at an arbitrary position of a tractor body, a signal from the tilt angle sensor and a critical fall tilt angle are compared and calculated, and a traveling direction of the tractor is determined immediately before reaching the critical fall tilt angle. A tractor safety device characterized by being configured to switch a transmission in a reverse direction.