JPS59102305A - Riding type plowing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tilling device on a traveling vehicle body that can be raised and lowered via a single-acting two-lift arm cylinder, and a control valve for raising and lowering operation is provided in a pressure oil supply path to the cylinder. The tiller is provided with a rotary force bar of the tilling device so as to be freely swingable, and the cylinder is automatically operated based on the displacement of the rotary force bar so as to maintain the rocking angle of the rotary force bar within a predetermined range. This invention relates to a riding tiller equipped with a depth control groove.

Conventionally, the plowing depth control mechanism was constructed using the above-mentioned equipment, but the amount of rocking of the rotary cover was electrically detected using a potentiometer, etc., and the detected signal was corrected to determine the actual plowing depth. The control valve is configured to automatically operate the control valve based on the detection and the comparison between the result of the detection and the set value by the setting device. In other words, plowing depth control is performed by linking the rake force control valve with the control valve.

However, since it incorporates an electric control circuit for Shinsugi treatment, it is expensive and has the drawback of being prone to failure.

In view of the above points, the present invention aims to make a simple improvement to the hydraulic circuit so that the plowing depth control mechanism can be constructed at low cost.

In order to achieve the above-mentioned object, the present invention configures the above-mentioned fit deep control method in the above-mentioned Norikawa Sei cultivator,
Between the control valve and the cylinder, the pressure oil supply is increased by +ifr. ! /1 A return path is connected to release the supplied oil in a state where the cropping position is locked, and an opening adjustment valve is interposed in the return path, and the opening adjustment valve and the rotary hole are connected to the rotary cover. They are interlocked and connected via a mechanical linkage mechanism so that the degree of opening decreases as the roller swings upward, and the degree of opening increases as the rocker puller swings downward. It is characterized by

In other words, there is back pressure in the lift arm cylinder due to heavy use of the tillage equipment, and if the balance between that back pressure and the pressure of the pressure oil supplied to the lift arm cylinder is adjusted,
Focusing on the fact that the m-rotation device can be operated up and down while constantly supplying pressure oil to the 7-arm cylinder, we connected a return path to a predetermined point of the pressure oil supply path and installed an opening adjustment valve in the return path. The displacement of the rotary cover itself is applied as an operating force to the opening adjustment valve via a mechanical linkage mechanism, and when the rotary cover swings upward, the opening is reduced.
The lift arm cylinder is moved forward against the back pressure, raising the tilling device relative to the ground, and conversely, when the rake force bar swings down, the opening is increased, and the back pressure removes the tiller from the lift arm cylinder. The oil is drained, the tiller is lowered relative to the ground, and the tiller is maintained at a height within a set range relative to the ground.

Therefore, although it is a simple improvement of adding a return path and an opening adjustment valve to the conventional hydraulic circuit, the mechanical linkage mechanism reduces failures and is inexpensive, creating a 1=1 [deep control mechanism]. Now you can.

In particular, according to the present invention, when a plowing device is installed in place of the tilling device to perform leveling work, the mechanical linkage mechanism is removed from the opening adjustment valve and the top, which is attached via a torsion bar, is removed. By interlocking and connecting the link holder and the opening adjustment valve via the draft iron, the book device can be operated at a constant depth above the ground, which is highly effective in practice.

Hereinafter, embodiments of the present invention will be described in detail based on illustrative drawings.

A rotary displacement device (3) is connected to the rear of the traveling vehicle (1) via a three-point linkage mechanism (2) consisting of a top link (2a) and a pair of left and right lower linter (2b), (2b), Lower links (2a), (2b) and a pair of left and right lift arms (4) installed on the top of the tractor (1).
), +4+ are connected via liftronds (5) and +5+, and a single auxiliary hydraulic cylinder (hereinafter referred to as a lift arm cylinder) (6) is linked to the lift arms f41 and +41. They are connected, and a riding type Kodentsuki is installed in the groove.

A pump (Pl) driven by the engine output is installed in the lift arm cylinder +e+ to supply pressure oil through a control valve (1), and a link machine flNB+ is connected to the control valve (7). At the same time, the operating lever +91 is connected with a continuous weight, and the lift arm (4) is connected to the link register (8).
) are connected via the rod (10), and as the control valve (IIt) is operated by the operating lever (9), the lift arm sill (6) is moved one step, and the tow arm (7) is operated. 4) is swung, the swiveling displacement of the lift arm (4) is fed back to the control box (11) via the link mechanism (8), and corresponds to the operating position of the operating lever (9). When the lift arm (4) oscillates to the position Q'+1, the control valve (1) is automatically switched to the neutral position, and the tiller is activated so that the vertical movement of the tiller 1 (3) stops spontaneously. has been completed.

In the figure, (12) shows a valve for adjusting the lifting speed, and 11'i. of the tilling device (3). +1″r is designed to prevent the descending speed from increasing.

Between the control valve (11) and the speed regulating valve (l2) 7, a return passage 04 for releasing the supplied pressure oil is connected in the middle of the pressure oil supply passage, and the return passage 0 (9) has an opening degree. A regulating valve (l4) is interposed, and by adjusting the opening degree of the valve (l4), the balance between the back pressure from the lift arm cylinder (6) and the pressure of the pressure oil supplied to the cylinder {6} is maintained. , 1, and the pressure balance between the two is maintained in equilibrium, so that the height of the low cleaner 44F filter device (3) is maintained stably.

At the rotary lift device (3) K, install the rotary cover (
15) is pivotally connected to the rotor frame (16) so as to be swingable around the vehicle body left-right axis axis tQl, and the rocker arm 8 θ force is interlocked and connected to the rotor lever (15), and the opening angle is A link mechanism (18) operatively connected to a regulating valve (14)
1 is connected via a push-pull wire (19), and a tilling depth setting lever (20) is interlocked with the link mechanism (country), and when the tilling depth by the rotary tilling device (3) changes, The cover (15) is displaced, and the opening adjustment valve (14) is automatically operated by the displacement of the cover θ, and the lift arm cylinder (6) is automatically operated.
A tilling depth control mechanism (2l) is configured to automatically maintain the tilling depth set by the tilling depth setting lever (3).

The push-pull wire (I9) connects to the link mechanism (18
), and when working with the book device (2 shacks) installed, it can be easily changed to working type D (so-called draft control), which maintains a constant plowing depth using the plowing device W (22). It is configured as follows, and will be explained in detail next.

That is, as shown in FIG. 3, a torsion par (top link holder tray 4 via 231) is attached to the rear of the vehicle body, and a tiller is attached to the top link (2a) and lower links (2b), (2b). A plaque device (own) is connected instead of the mounting tafal, and the top link holder (24) and the above-mentioned J11 valve (14) are connected to the rond (
The top link holder 4 is connected to the top link holder 4 to prevent changes in the elbow ground load on the plowing device (2) due to changes in plowing depth.
) to the rearward displacement of nfl by 414%, and then operate the opening adjustment valve Q4i to change the placket mounting (2'4).
is configured to automatically maintain the plowing depth at a set depth.

The push-pull wire 09 as described above is used to interlock and connect the rotary force bar (15) and the opening adjustment valve 04).
), but also bell cranks, links, rondos, etc., when viewed from the side, lower links (2+)), (
2b) and the 441 single-turn device (3) side are provided with overlapping pins on the pivot parts of the vehicle body side (2b) and the 441 single-turn device (3) side, respectively, so that the rotary force bar (15) and the opening degree can be controlled by these. ilI! ]'j position valve (may be linked with 14, i80 push wire -
(19+, mechanical linkage machine 11
(collectively referred to as 19no).

[Brief explanation of drawings]

The drawings show a blowing example of the riding type Masuden according to the present invention, and Fig. 1 is a perspective view of the central part, Fig. 2 is a schematic illustration of the depth control mechanism shown together with the hydraulic circuit, The third panel is a schematic diagram of the draft control mechanism during plaque work. (3)... Cultivation device, (6)... Lift arm cylinder, (ll)... Control valve, (1
3)... Return path, (14)... Opening adjustment valve, (+5)... Rotary canopy, (19
j...Mechanical interlocking mechanism, push-pull wire, tapping)...Haibuka control mechanism. 42

Claims (1)

[Claims] (A tilling device (3) is provided on the D traveling vehicle body so that it can be raised and lowered via a seven-arm cylinder (6) instead of a single acting,
A control valve (1l) for lifting and lowering is provided in the pressure oil supply path to 6), and the rotary force bar (16) of the tilling device (3) is provided to be swingable, and the displacement of the 700-meter coverper 05) is provided. A riding tiller equipped with a plowing depth control mechanism (1) that automatically operates the cylinder (6) to maintain the swing angle of the rotary force bar (15) within a set range based on In order to configure the tillage depth control mechanism (21),
Between the control valve (l1) and the cylinder (6), a return path (l3) is provided in the pressure oil supply path to release the supplied pressure oil with the control valve (ll) in the raised operation position.
At the same time, the iirT recording return path (with an opening adjustment valve (+4) interposed in the lug, the opening adjustment valve 04) and the rotary cover (15) are connected to the rotary cover (151).
is interlocked via a mechanical linkage mechanism (l9) so that as the rotary cover (16) swings upward, the opening becomes smaller, and as the rotary cover (16) swings downward, the opening becomes larger. A riding power tiller characterized by being connected. ■The mechanical linkage mechanism is a push-pull wire (19)
A tiller according to claim (2).