JPH035206Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention includes a ground sensor that detects the height of the working part above the ground and a rotational operation of the working part lifting mechanism so that the height of the working part above the ground is maintained within a set range. A mechanical interlocking mechanism 1 having a swinging member 11 integrally rotatably attached to the rotary operation shaft.
7, a flexible part that allows the rotary operation shaft to be operated to the working part raised position regardless of information from the sensor is connected to the swinging member and a flexible part that is closer to the sensor than the swinging member. An artificial operation in which a spring is provided between the interlocking member and the rotary operating shaft to bias the rotary operating shaft to the working part lowered position, and the rotary operating shaft is brought into contact with the swinging member to operate the rotary operating shaft to the working part raised position. The present invention relates to an operation structure for a working vehicle, in which a tool is swingably provided and a releasable lock mechanism is provided to hold the human operating tool outside the range in which the swinging member is operated by the sensor.

The above operating structure is configured so that the working part can be manually raised by giving priority to information from the sensor, and during automatic control, the manual operating tool does not move in conjunction with the lifting operation of the working part. like,
Although it was designed to be fixed,
Conventionally, the human operating tool has been attached to the rotary operating shaft, so when the rotating operating shaft is operated during automatic control, it comes into sliding contact with the mounting boss of the human operating tool, creating frictional resistance. Even when the sensor moves to the detection position where a lowering operation is required, the rotating operation shaft cannot smoothly follow the sensor displacement due to friction, and the working part cannot be moved up and down smoothly.

An object of the present invention is to modify the mounting structure of a human operating tool so that it does not have an adverse effect on the operation of a rotary operating shaft.

A characteristic configuration of the present invention is that in the above-mentioned operating structure for a work vehicle, the support shaft of the human operating tool is a separate shaft from the rotary operating shaft, and there is a gap between the supporting shaft and the rotary operating shaft. The functions and effects are as follows.

In other words, a support shaft is provided separately from the rotary operation shaft with a gap between it and the rotation operation shaft, and the human operation tool is attached to this support shaft, so the human operation tool can be used for automatic control. In other words, even if it is fixed at a position outside the swinging range of the swinging member, the rotational operation shaft will not come into sliding contact with the human operating tool.
Therefore, when the rotary operation shaft is operated by a sensor or a spring, the rotation can be performed smoothly without being resisted by the human operation tool, and the elevation control of the working part can be performed by sensor displacement. I was able to do this with a smooth response.

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

As shown in FIG. 1, a rotary tiller 4 is operated to raise and lower via a link mechanism 3 that can be driven up and down by hydraulic cylinders 2 as a row of drive mechanisms at the rear of the wheeled traveling body 1. The riding tiller is configured such that they are freely connected and transmit power from the traveling machine body 1 to the tilling device 4 via the rotary shaft 5.

The part 6 of the rotary cover of the tilling device 4 facing the rear part of the rotary is aligned with the axis of the other part 7.
A detection part 6a is pivotally connected so as to swing up and down around _P1 , is biased downward by a spring 8 so that the free end side is in contact with the ground, and extends integrally from the rear cover part 6 so as to be able to swing freely. The height of the tillage device 4 from the ground is detected based on the attitude of the tiller 4 with respect to the cover portion 7. As shown in FIGS. 2 and 3, a rotating shaft 10 for operating the control valve 9 of the cylinder 2 is
A swinging member 11 integrally rotatably attached to this rotating shaft 10, and a contact member 12 for this swinging member 11.
The transmission case 1 is installed with the
The detection unit 6
a, and a spring 18 is attached to the swinging member 11 to urge the rotary operation shaft 10 to the tiller lowering position, and the swinging member 11 is urged into contact with the interlocking member 15. , the rotary operation shaft 10 is configured to be automatically operated by the rear cover portion 6 and the spring 18 so that the height detected by the rear cover portion 6 is within a set range;
Regardless of the longitudinal inclination of the traveling body 1, the tilling device 4
The height above the ground is controlled to be maintained within a set range, allowing work to be carried out while keeping the plowing depth approximately constant.

As shown in FIGS. 2 and 4, the holding fitting 19 at the end of the outer wire 16a of the release wire 16 is attached to
The outer wire 16a is attached to the free end side of a support member 21 which is swingably attached to the swing member 11, and the operating lever 22 is extended from the support member 21, so that the end of the outer wire 16a can be moved toward and away from the swing member 11. The lever 22 is configured to be able to be moved and adjusted at the adjustment position by locking the lever 22 in a notch of the lever guide 23, and the set tillage depth can be changed and adjusted by operating the outer wire 16a. It is set as.

As shown in FIGS. 2 and 3, the control valve 9 is connected to a bolt 24 attached to the mission case 13, and a support is provided with a gap between the control valve 9 and the rotary operation shaft 10. axis 25
A human operating tool 26 is swingably attached to the manipulator 26, and a member 27 forming an abutting portion for the swinging member 11 is slidably inserted into a pair of elongated holes in each member 27. Two tightening screws 2
8 and 28, the operating tool 26 is attached to the operating tool 26 so that the position can be adjusted and fixed freely, and when the operating tool 26 is in the first operating position (AUT), it is swung by the rear cover portion 6 and the spring 18. When the operating part forming member 27 is located outside the range in which the moving member 11 is operated and the operating tool 26 is operated to the second operating position (N), the rotary operating shaft 10 is operated to the neutral position. Furthermore, when the operating tool 26 is operated to the third operating position (UP), the rotary operating shaft 10 is configured to be operated to the tiller raising position. The ball stopper 30, which is an example of a locking mechanism for locking and fixing the operating tool 26 to the locking tool 29, is brought into a released state by applying an operating force greater than a set value to the operating tool 26, and the operating tool 26 is released. When the operating tool 26 is placed in the second or third operating position (N) or (AUT), the operating tool 26 is projected and biased so as to automatically engage with the locking tool 29.
The operating tool 26 is attached to the rear cover portion, and the operating tool 26 is configured to be releasably held in the second or third operating position (N) or (AUT) against the spring 18. Regardless of the information from 6, the tilling device 4 can be manually operated to the raised position or the neutral position, and the tilling device 4 can be manually and forcibly raised or locked.
During automatic control, the operating tool 26 is fixed so as not to move in conjunction with the raising and lowering of the tilling device 4.

The connecting pin 31 between the detecting section 6a and the release wire 16 is configured to be removable, and the detecting section 6a and the release wire 16 are separated to release the elevation control. In this case, as shown by the imaginary line in FIG. 5, the detection part 6a is adjusted to swing around the connecting pin 32 so that the connecting part to the release wire 16 is laterally separated from the release wire 16. At the same time, it is configured to be fixed at this adjustment position with a tightening bolt 33 to prevent the release wire 16 from being accidentally operated due to swinging of the rear cover portion 6.

In the interlocking part of the swinging member 11 and the interlocking member 15,
An elongated hole may be provided that allows a predetermined amount of relative movement between the two, and these are collectively referred to as a flexible portion 12 that allows the rotary operation shaft to be operated to the raised position regardless of information from the sensor.

The support shaft 25 can be changed to a cylindrical shaft or the like arranged concentrically with the rotary operation shaft 10 with a gap therebetween.

The rear cover portion 6 can be changed to a swing bar or a sliding lifting member specially provided for detecting the height above the ground, and these are collectively referred to as the ground sensor 6 for detecting the height above the ground.

The present invention can also be applied to a structure for lifting and lowering the pre-reaping processing section of a combine harvester, and the tilling device 4 is referred to as a working section 4.

[Brief explanation of drawings]

The drawings show an embodiment of the operation structure of the working vehicle according to the present invention, in which Fig. 1 is a partially cutaway side view of the rear part of the riding power cultivator, Fig. 2 is a side view of the interlocking mechanism, and Fig. 3 is the human operating tool. FIG. 4 is a partially cutaway rear view of the arrangement portion, FIG. 4 is a partially cutaway rear view of the outer wire attachment portion, and FIG. 5 is a partially cutaway plan view of the detection portion. 2... Drive mechanism, 4... Working part, 6... Ground sensor, 10... Rotating operation shaft, 11... Rocking member, 12... Flexible part, 15... Interlocking member, 17...
...Interlocking mechanism, 18... Spring, 25... Support shaft, 26... Human operating tool, 30... Lock mechanism.

Claims (1)

[Scope of utility model registration request] In order to maintain the height of the working part 4 above the ground within the set range, the ground sensor 6 that detects the height of the working part 4 above the ground and the rotary operation shaft 10 of the working part elevating drive mechanism 2 are rotated. The rotary operating shaft 10 is operated to the working part raised position regardless of the information from the sensor 6 by interlocking with the operating shaft 10 through a mechanical interlocking mechanism 17 having a swinging member 11 that is integrally and rotatably attached to the operating shaft 10. A flexible section 12 that allows
is provided between the swinging member 11 and the interlocking member 15 closer to the sensor 6 than the swinging member 11, and a spring 18 is provided that biases the rotational operation shaft 10 to the working part lowered position. Swing member 11
A manual operating tool 26 is swingably provided for operating the rotary operating shaft 10 to the working part raised position by contacting the sensor 6. An operation structure for a working vehicle that is provided with a releasable lock mechanism 30 for holding an operating tool 26, wherein the support shaft 25 of the human operating tool 26 is separate from the rotational operation shaft 10, and the rotational operation An operating structure for a working vehicle that is arranged with a gap between it and the shaft 10.