JPS5913765Y2 - Response device for automatic working depth control mechanism in tractors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure in which a response device for a riding tractor capable of automatically adjusting plowing depth is mounted via an intermediate shaft at a position separate from a hydraulic lifting mechanism.

This is carried out when the position of the valve opening/closing shaft of the hydraulic lifting mechanism that raises and lowers the tilling section is not in an appropriate position for installing a response device, and its purpose is to prevent the operator from operating the hydraulic lever. It is installed in an easily accessible position to enable automatic adjustment of the tilling depth and manual lifting and lowering of the tilling section, making it easy to switch between the two, as well as smoothing the forward and backward rotation of the hydraulic lever to automatically adjust the tilling depth. We propose a response device designed to fully demonstrate the functions of the mechanism.

In this specification, a riding tractor capable of automatically adjusting the plowing depth means a riding tractor equipped with a sensing transmitter in the tilling section, a response device in the hydraulic lifting mechanism, and a leveling plate at the rear end of the rotary cover. A ground plate whose front end is rotatably supported and whose lower end is extended rearward to work with a sensing and transmitting device is grounded on the cultivated ground, and the amount of vertical movement of the ground plate is sensed. It is designed to link the signal from the sensing transmitter to the response device, and the response device is rotatably supported on the aircraft body with an intermediate shaft located below the front of the seat. , A frame body that fixes a pin orthogonal to the intermediate shaft is fixed, and a sensor installed in the tilling section is installed on the outside of the hydraulic lever, which is installed so that it can be tilted in the axial direction of the intermediate shaft using the pin as a pivot. A response plate that rotates in conjunction with the signal from the transmitter is loosely fitted to the intermediate shaft and installed in parallel, and the hydraulic lever is fitted and locked into a notch provided in the bent portion of the upper edge of the response plate. The intermediate shaft is configured to rotate integrally with the rotation of the response plate.

The present invention is an improvement on such a response device, and the response device according to the present invention has a plate member extending upwardly fixed to the side end of the frame body, and a connection between the plate member and the hydraulic lever. A bullet is fitted in between, and an interlocking arm extends from the intermediate shaft, and the interlocking arm is connected via a linkage rod to an interlocking arm extending from the valve opening/closing shaft of the hydraulic lifting mechanism, and the hydraulic lever is When the plowing depth is inserted and locked into the notch, the plowing depth is automatically adjusted, and the hydraulic lever is manually removed from the notch against the elastic force of the bullet, and the valve opening/closing shaft is manually operated via the connecting rod. When the tiller is rotated by operation, the tilling section is configured to be able to move up and down independently of the signal from the sensing and transmitting device.

The present invention will be specifically explained below based on the drawings that can be illustrated.

Reference numeral 1 denotes a riding tractor, which is constructed by suspending a tilling section 3 from a main machine 2 such that it can be raised and lowered.

This machine 2 has an engine 4, a front wheel 5, a rear wheel 6, a rear wheel cover 7,
Handle 8, seat 9, transmission casing 10, lift arm 11
A hydraulic elevating mechanism 13 is provided for elevating and lowering the tilling section 3 via a connecting rod 12 and a connecting rod 12.

The tilling section 3 includes a king pin 14 that connects to the main machine 2, a chain case 15, a tilling blade 16, a rotary cover 17,
Rear beam 18, threaded rod 19 for adjusting plowing depth and its handle 2
0 and a flat plate 21.

The tip of the leveling plate 21 is rotatably supported by the rear end of the rotary cover 17, and its lower end forms a ground plate 22.

The face plate 23 at the rear end of the rear beam 18 is provided with a horizontal rod 2 having a hexagonal cross section.
4 is welded to the left and right sides of the horizontal rod 24, and a support pipe 26 of a rotary member 25 is fitted on the left and right sides of the horizontal rod 24. A telescopically adjustable elastic rod 27 is attached to the rotary member 25.
is inserted.

The bullet rod 27 has bullets 28.2 located above and below the rotary part 25.
9 is elastically adjustable, and the lower end of the elastic rod 27 is connected to the ground plate 22.
The structure is such that the leveling plate 21 is elastically supported by being pivotally supported.

Next, reference numeral 30 denotes a sensing and transmitting device, which is a transmitting frame 31 provided on the side wall of the rear beam 18. Rotation axis 3 of transmission frame 31
Transmitter 33 pivotally supported by 2, transmitter 33 and ground plate 2
It is composed of an extendable and retractable sensing rod 34 that connects the two.

On the other hand, the hydraulic lifting mechanism 13 is located at the lower front of the seat 9.
An intermediate shaft 36 is rotatably supported on a bearing plate 35 provided on the front surface of the intermediate shaft 36, and a frame 55 for fixing a pin perpendicular to the intermediate shaft 36 is fixed to the intermediate shaft 36, and the pin 44 is supported as a support shaft. On the outside of the hydraulic lever 42, which is mounted so as to be tiltable in the axial direction of the intermediate shaft 36, there is a response plate 38 which is rotated in conjunction with a signal from the sensing and transmitting device 30 provided in the tilling section 3. The hydraulic lever 42 is fitted into and locked in a notch 37 provided in the bent portion of the upper edge of the response plate 38, and the intermediate shaft 36 rotates the response plate 38. It is configured to be rotated integrally with the

The above is the configuration of the response device 45.

A valve opening/closing shaft 46 for opening and closing a hydraulic valve (not shown) is made to protrude from the side wall of the hydraulic lifting mechanism 13 so that the hydraulic lifting mechanism 13 is operated to raise and lower the tilling section 3.

Further, an interlocking arm 47 is provided protruding from the valve opening/closing shaft 46, and an interlocking arm 48 is also provided protruding from the intermediate shaft 36, and both interlocking arms 47 and 48 are rotatably connected by a linking rod 49. 36
This structure connects the valve opening/closing shaft 46 and the valve opening/closing shaft 46 in an interlocking manner.

Further, 50.50' is a Bowden wire formed by inserting an inner wire 52.52 into an outer wire 51.51', and one end of the outer wire 51.51' is fixed to the front end of the transmission frame 31, and the other end is fixed to the front end of the transmission frame 31. is response frame 4
It is attached to the rear end of 1.

On the other hand, connect one end of the inner wire 52, 52' to the transmitter 3.
The transmitter 33 and the response plate 38 are interlocked by being engaged with the transmitting pins 53 and 53' provided on the top and bottom of the response plate 38, and the other end is engaged with the response pins 54 and 54' provided on the top and bottom of the response plate 38. are doing.

The tilling depth is automatically adjusted when the hydraulic lever 42 is fitted into the notch 37, and when the hydraulic lever 42 is out of the notch 37, the tilling section 3 can be raised and lowered by manual operation. .

Next, the operating state of the response device in the riding tractor capable of automatically adjusting the plowing depth according to the present invention will be described in detail.

First, in the field to be tilled, trial tillage is performed by rotating the tilling blade 16 while moving the riding tractor 1 forward.
Rotate up or down to set the working depth.

After that, the elasticity of the elastic rod 27 is adjusted to adjust the angle of the leveling plate 21 with respect to the ground, and the elasticity of the ammunition machines 28 and 29 is adjusted to adjust the elastic contact force of the ground plate 22 to the plowed ground, thereby completing the tilling work. Start.

At this time, the tillage depth changes from shallow to deep due to changes in soil conditions such as hardness and softness of the slope.

For example, when the tillage depth becomes shallow, the ground plate 22 of the leveling plate 21, which slides in elastic contact with the tilled ground, descends.

At that time, the transmitter 33 rotates downward via the sensing rod y,
The tensioning action of the inner wire 52 causes the response plate to rotate the hydraulic lever 42 forward, thereby rotating the intermediate shaft 36 via the pin thread and the frame 55.

Interlocking with the rotation of the intermediate shaft 36, the interlocking arm 4 and the interlocking rod 4
9. Rotate the valve opening/closing shaft 46 via the interlocking arm 47 to lower the tilling section 3 to correct the depth of tillage.

Further, when the tilling depth becomes deeper than the set depth, the ground plate 22 rises, contrary to the above, and the transmitter 33
Rotate upward.

The response plate 38, the hydraulic lever 42, and the intermediate shaft 36 are rotated by the tensile action of the inner wire 52' caused by the upward rotation of the transmitter 33.

In conjunction with the rotation of the intermediate shaft 36, the valve opening/closing shaft 46 is rotated via the connecting rod 49 to raise the tilling section 3, thereby correcting the tilling depth to become shallower.

Since the tilling operation is continued while repeating this action of adjusting the depth of tillage, it is possible to carry out tilling operations within a certain range of depths and at the same time to perform orderly leveling operations.

When the forward work is completed, the hydraulic lever 42 is tilted inward against the bias of the ammunition 43, removed from the notch 37, and manually rotated to the rear to raise the tilling section 3 significantly. and operate the handle 8 to turn the machine 2 and head for the return trip.

Then, manually rotate the hydraulic lever 42 forward to lower the tilling section 3.

After that, the hydraulic lever 42 is released, and the bullet machine 43 is elastically biased to automatically fit into the notch 37 and lock the plowing depth to automatically adjust the plowing depth, and the tilling operation is continued again.

Generally speaking, from the design aspect of the main machine 2 of the passenger tractor 1, the hydraulic lifting mechanism 13 is placed on the top surface of the transmission housing 10, and the seat 9 is placed above it.
It is convenient to design the valve opening/closing shaft box to protrude laterally from the side surface of the hydraulic lifting mechanism 13.

Therefore, even if an attempt is made to install the response device 45 directly on the valve opening/closing shaft 46, it is difficult to provide the response device 45 with sufficient dimensional space because the gap between the seat 9 and the rear wheel cover 7 is narrow. However, even if the hydraulic lever 42 is forcibly mounted directly on the valve opening/closing shaft box, the hydraulic lever 42 will come into contact with the seat 9 and the rear wheel cover 7, preventing smooth rotation and preventing the automatic plowing depth adjustment function from being reliably performed. Become.

The response device 45 according to the present invention is not mounted directly on the valve opening/closing shaft 46, but is equipped with a hydraulic lever 42, a response plate 38, etc. on an intermediate shaft 36 rotatably supported at the lower front of the seat. Since the valve opening/closing shaft 46 and the intermediate shaft 36 are interlocked and connected via the interlocking arms 47, 48 and the connecting rod 49, the hydraulic lever 42 can be installed at a location where it can be easily operated by the driver. In addition, since it can be installed in a location where it does not come into contact with the seat 9 or the rear wheel cover 7, the rotation of the hydraulic lever 42 operates smoothly and the function of automatic plowing depth adjustment is reliably performed. .

As detailed above, the response device in a riding tractor equipped with the automatic plowing depth adjustment mechanism according to the present invention is not mounted directly on the valve opening/closing shaft, but is mounted on the intermediate shaft rotatably supported below the front of the seat. Since the hydraulic lever is configured to operate the valve opening/closing shaft via an interlocking arm or link, it is extremely easy to install the hydraulic lever in a location that is easy for the driver to operate, and there is no risk of it coming into contact with the seat or rear wheel cover. It is possible to avoid a certain location and place it in a location with sufficient space.

Furthermore, since the hydraulic lever can be switched between automatic and manual, even if you lean left or right, you will not collide with the seat or rear wheel cover.
This enables a design that allows manual switching to be performed reliably.

In addition, since the hydraulic lever can be smoothly rotated back and forth when the tilling depth is automatically adjusted, the automatic tilling depth adjustment action is reliably performed, and other excellent effects are exhibited.

Furthermore, even a passenger tractor equipped with an off-the-shelf manual hydraulic lifting mechanism can be easily equipped with an automatic plowing depth adjustment mechanism by adopting the intermediate shaft type response device according to the present invention. It is possible to carry out highly accurate tilling and leveling work that maintains the plowing depth and leveling the land in an orderly manner.

[Brief explanation of drawings]

The attached drawings are drawings illustrating embodiments of the present invention, in which Fig. 1 is a side view of a riding tractor, Fig. 2 is an explanatory diagram of a connected state of a response device and a sensing transmitter, and Fig. 3 is a diagram showing a state in which a response device and a sensing transmitter are connected. Second
FIG. 4 is a partial cross-sectional view of the A-piece in the figure, and is an explanatory view of the state in which the leveling plate and the horizontal rod are connected. In these drawings, 9 is a seat, 13 is a hydraulic lifting mechanism, 30 is a sensing transmitter, 36 is an intermediate shaft, 37 is a notch, 3
8 is a response plate, 42 is a hydraulic lever, 43 is a bomb, 45 is a response device, 46 is a valve opening/closing shaft, 47, 48 is an interlocking arm, 49 is a link, 55 is a frame, and 56 is a plate material.

Claims (1)

[Scope of utility model registration request] A sensing and transmitting device 30 is provided in the tilling section 3 of the riding tractor 1, a response device 45 is provided in the hydraulic lifting mechanism 13, and the front end of the leveling plate 21 is rotatably supported on the rear end of the rotary cover 17, and the lower end thereof The sensing and transmitting device 30 is installed by extending the section to the rear.
The grounding plate 22, which is designed to be interlocked with the ground plate 22, is brought into contact with the plowed ground, and a signal from the sensing and transmitting device 30, which senses and transmits the amount of vertical movement of the grounding plate 22, is linked to the response device 45 to automatically adjust the plowing depth. In the response device 45 of the passenger tractor, which is adapted to be adjusted, an intermediate shaft 36 is rotatably supported by the vehicle body with an intermediate shaft 36 located below the front of the seat 9. A sensing and transmitting device 30 provided in the tilling section 3 is mounted on the outside of the hydraulic lever 42 to which a fixed frame 55 is fixed and is mounted so as to be tiltable in the axial direction of the intermediate shaft 36 using a pin 44 as a support shaft. A response plate 38 that is rotated in response to a signal from the intermediate shaft 36 is loosely fitted and arranged in parallel with the intermediate shaft 36, and the hydraulic lever 42 is inserted into a notch 37 provided in a bent portion of the upper edge of the response plate 38. The intermediate shaft 36 is configured to be fitted and locked so that the intermediate shaft 36 is rotated integrally with the rotation of the response plate 38. In such a response device 45, at the side end of the frame body 55, , a plate material 56 extending upward
is fixed, a bullet 43 is fitted between the plate material 56 and the hydraulic lever 42, and an interlocking arm 48 extends from the intermediate shaft 36, and the valve opening/closing shaft 46 of the hydraulic lifting mechanism 13 is fixed.
The interlocking arm 48 is connected via a linkage rod 49 to an interlocking arm 47 extending from the notch 37, and when the hydraulic lever 42 is fitted into the notch 37 and locked, the plowing depth is automatically adjusted, and the ammunition of the ammunition machine 43 is adjusted. Hydraulic lever 42 is manually operated against the force.
When the valve is removed from the notch 37 and the valve opening/closing shaft 46 is manually rotated via the connecting rod 49, the tilling section 3 can be moved up and down independently of the signal from the sensing transmitter 30. A response device for a riding tractor capable of automatically adjusting plowing depth.