JPS6013288Y2 - Detection device for mobile work equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a detection device for a mobile work machine that detects height above ground and direction of movement.

In order to detect the height above the ground and the direction of travel, conventionally, a first grounding body that is pivotally supported to be vertically swingable and a second grounding body that is pivotally supported to be freely swingable about the vertical axis are separately provided. A method is adopted in which the height above the ground is detected based on the vertical displacement of the first grounding body, and the direction of movement is detected based on the rotational displacement of the second grounding body, but in this case, two grounding bodies are required. Therefore, the number of parts and assembly steps are large, and the overall structure tends to be expensive.

The present invention was made keeping in mind the above actual situation,
In the detection device for a mobile work machine having the above-mentioned structure, a grounding body that can freely swing up and down is attached to a cylindrical shaft that can freely rotate about the vertical axis via a horizontal shaft, and A rod having a rack carved thereon is inserted, and the rod and the horizontal axis of the grounding body are engaged with each other via a pinion to convert the vertical movement of the grounding body into the vertical movement of the rod, and further , a stroke sensor is provided to convert the amount of vertical fluctuation of the grounding body via the rod into an electrical signal, and a stroke sensor is provided that converts the amount of vertical fluctuation of the grounding body into an electric signal, and the vibration is transmitted around the vertical axis of the grounding body through a gear formed on the outer periphery of the cylindrical shaft. A volume that converts the amount of rotation at It is characterized in that it is configured to detect the displacement of the grounding body in the width direction of the fuselage.

In other words, the height above the ground is detected by the vertical rocking displacement of one grounding body, and the direction of movement is detected based on the rotational displacement around the vertical axis. Compared to the case where the sensor is provided and the detection is performed individually, the number of parts and the number of assembly steps can be reduced, and the overall structure can be made cheaper.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a mobile working machine in which a tilling device 2 is attached to the rear of a tractor 1, which is a self-propelled machine, so as to be able to move up and down.

The tilling device 2 is suspended and supported by a pair of left and right lifting arms 4, 4 that are driven and moved by a single-acting hydraulic cylinder 3, and is raised when the hydraulic cylinder 3 is forcibly extended. When the hydraulic cylinder 3 is switched to a freely retractable state, it is configured to be lowered by its own weight.

As shown in FIG. 2, a pair of detection devices 5 and 6 are installed at the rear of the tilling device 2 to detect the height of the tilling device 2 from the ground and the direction of movement of the machine.

These detection devices 5, 5 have the same structure, and below, only one side will be explained based on FIG. 3.
A case 6 fixed to a support frame 19 connected to the tilling device 2 supports a cylindrical shaft 7 rotatably around the vertical axis, and the cylindrical shaft 7 has its axis oriented horizontally. A rotation shaft 8, which is a horizontal axis, is rotatably supported.

A grounding body 9 consisting of a support arm 9a extending in a cantilevered manner and a rotating body 9b pivotally supported by the extending end of the arm 9a is fixed to the protruding end of the rotation shaft 8.

A pinion 10 is fixed to the rotation shaft 8, and
A rod 11 is inserted into the cylindrical shaft 7 so as to be vertically movable, and the pinion 1 is provided on the outer surface of the rod 11.
A rack 12 is formed which engages with 0.

A movable body 13 that moves in the vertical direction is provided on the upper part of the case 6.
A so-called stroke sensor 13 that changes the output voltage based on the displacement of the movable body 13 is provided.
The lower end of a and the upper end of the rod 11 are abutted and connected.

A volume 14 that changes the output voltage based on the rotational displacement of the gear 14a is attached to the case 6, and
The gear 14a and a door-shaped gear 15 fixed to the cylindrical shaft 7 are engaged with each other.

Then, the height of the tilling device 2 from the ground is detected based on the vertical rocking displacement about the axis of the rotating shaft 8 of the grounding body 9, and the height of the tilling device 2 from the ground is detected. The stroke sensor 13 is configured to detect the traveling direction based on the rotational displacement around the vertical axis, and the detection result of the height above the ground is sent to the stroke sensor 13.
The output voltage of the volume 14 is taken out, and the detection result of the traveling direction is taken out as the output voltage of the volume 14.

Further, the detection results of the rain detection devices 5, 5 are appropriately communicated to the operator using a display mechanism (not shown), so that the operator can perform various operations.

That is, for example, when the rain detection devices 5, 5 detect that the height above the ground has changed, the cylinder 3 is expanded and contracted to correct the plowing depth.

Further, when the rain detection devices 5, 5 detect different heights from the ground, it is determined that the tractor 1 is tilted to the left or right, and the respective lifting arms 4, 4 and the tilling device By operating the hydraulic cylinders 16 and 16 interposed between the tractor 1 and the tractor 1, the tilling device 2 is rotated around the longitudinal axis relative to the tractor 1, so that the tilling depth in the lateral direction becomes constant. Correct.

In addition, if the rain detection devices 5, 5 detect a lateral deviation of the aircraft when the aircraft is traveling straight, that is, when the aircraft is traveling straight, a wheel on one side of the aircraft slips, and the aircraft is on the slipping side. When the machine turns, the ground bodies 9, 9 receive lateral pressure and rotate about the vertical axis, and if a lateral deviation of the machine is detected when the machine is traveling straight, the operator can look at the display mechanism and Turn the rotary handle 17 to rotate the front wheel 18.
．． The lateral deviation of the aircraft will be corrected while changing the direction of the aircraft.

The detection result of the detection device 5 of the present invention may not only be notified to the operator as described above, but also may be automatically controlled based on the detection result.

Further, the detection device 5 of the present invention can be used in various forms, such as being attached to the tractor 1 in the embodiment and used to detect the amount of subsidence into the ground and the direction of movement of the tractor 1. It is.

[Brief explanation of drawings]

The drawings show an embodiment of the detection device for a mobile work machine according to the present invention, in which Fig. 1 is a side view of the mobile work machine, Fig. 2 is a schematic plan view of the tilling device section, and Fig. 3 is an expanded longitudinal section of the detection device. FIG. 7...Cylindrical shaft, 8...Horizontal shaft, 9...
...Grounding body, 10...Pinion, 11...
... Rod, 13 ... Stroke sensor 14 ... Volume, 15 ... Gear.

Claims (1)

[Scope of utility model registration request] A grounding body 9 that can freely swing up and down is attached to a cylindrical shaft 7 that can freely rotate around the vertical axis via a horizontal shaft 8, and a rod 11 with a rack 12 carved inside the cylindrical shaft 7. When inserted, the rod 11 and the horizontal shaft 8 of the grounding body 9 are engaged with each other via a pinion 10 to convert the vertical movement of the grounding body 9 into the vertical movement of the rod 11, and further, A stroke sensor 13 is provided which converts the vertical fluctuation amount of the grounding body 9 via the rod 11 into an electric signal, and the stroke sensor 13 converts the amount of vertical fluctuation of the grounding body 9 into an electric signal. A volume 14 that converts the amount of rotation around the vertical axis into an electrical signal is provided to detect the height above the ground based on the vertical rocking displacement of the grounding body 9, and A detection device for a mobile work machine, characterized in that it is configured to detect a displacement of a grounding body 9 in a body width direction with respect to a self-propelled body 1 based on rotational displacement.