JPS603682Y2 - Slide rotary tilling device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary tilling device in which the rotary tilling device is configured to be movable left and right at the rear of a tractor.

When the rotary tillage device is attached to the rear of the tractor, it is attached in a semi-fixed state using a work equipment attachment device such as a three-point link type.

For this reason, it was impossible to move the tractor straight and only swing the rotary tiller from side to side.

A slide rotary tiller is a system in which parts from the universal joint to the rotary gearbox are fixed, and the tiller claw shaft, tiller cover, rear cover, etc. are moved from side to side. The hydraulic equipment for the movement is expensive and its maintenance is complicated, so it has not been implemented.

This invention makes full use of hydraulic technology, and a hydraulic device for sliding is built into the support rod of the gearbox, which is called the main beam of the rotary tillage device, and the hydraulic pump is rotated by the rotation of the rotary gearbox. The hydraulic system for the slide rotary is constructed as a compact hydraulic system for a slide rotary by using a valve case and the like to construct a penetrating oil passage, and eliminating external piping and the like.

Furthermore, in addition to the compact structure, an overload relief valve is built into the vicinity of the cylinder's protruding port in order to avoid unexpected accidents during sliding, in case the rotary comes into contact with an obstacle, for safety and miniaturization. It is something that

The purpose of the present invention is as above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is an overall side view of a tractor equipped with the slide rotary tilling device of the present invention.

Engine 2 is built inside bonnet 1, and engine 2
The front axle bracket 3 protrudes forward from the side surface.

A front wheel 4 is supported on the front axle bracket 3.

A clutch housing 5 is fixed to the rear of the engine 2,
A transmission case 6 is fixed to the rear surface of the clutch housing 5, and a rear axle case 7 is further fixed to the rear surface of the transmission case 6.

A rear axle housing is protruded from both sides of a rear axle case 7, and a rear wheel 8 is supported thereon.

A hydraulic device 9 is mounted on the upper surface of the rear axle case 7, and a seat 10 is provided above the hydraulic device 9.

Top link bracket 1 behind the rear axle case
4 and the lower links 15, 1 are protruded, and the top link 16 is pivotally supported on the top link bracket 14.

These two lower links and one top link constitute a three-point link type work machine mounting device.

A lower link 15.
15 up and down.

A PTO shaft 51 is protruded from the rear surface of the rear axle case 7, and a universal joint 18 is inserted into the PTO shaft to couple and drive the input shaft 46 of the gear box 31.

The rotary tiller is provided with a top link mast 39 and a tail wheel mounting rod 32, and the tail wheel 22 is mounted in the tail wheel mounting hole 32.

The tilling claw 19 rotates around the tilling claw shaft, and the tilling cover 29
covers the upper part of the rotating tilling claw 19.

A rear cover 21 is pivotally protruded from the rear end of the tilling cover to prevent tilled soil from scattering.

28 is a side drive case, which transmits power to the tilling claw shaft by a chain or gear.

FIG. 2 is a plan view of the rotary tilling device of the present invention, and FIG. 3 is a plan view of the rotary tilling device moved to the right by the slide rotary device.

The slide rotary device does not move the top link mast 39, lower link pivot pins 42, 42', rotary gear box 31, etc., and moves the other tillage cover 2.
9. This is a device for sliding the rear cover''-21, the tilling claw 19, the tilling claw shaft, etc. from side to side.

Slide outer cylinders 35 and 37 protrude from both sides of the gearbox 31, and the portion that was conventionally fixed by the main beam is made slidable by slide inner cylinders 36 and 38 that are fixed and protruded from the side plate of the rotary tiller. I support it.

By being configured to slide, the slide inner cylinder 38
．． Since the rotary tilling device is able to rotate back and forth around 36, the slide support outer cylinders 41, 41' and the slide support inner cylinder 40 fixedly protrude from the tail wheel mounting rod 32.
, 40' are made to be unrotatable by engaging and sliding.

The slide support tube and inner tube also serve to reinforce the main beam, which allows it to slide.

The rear cover 21 is hinged to the rear end of the tillage cover 29, and hangs down by gravity in order to hold down the tilled soil.

A protruding rear cover 30 is provided on both sides of the rear cover 21 to protrude from the side plate of the tilling device, and eliminates the marks of the side plate and the difference in level from the adjacent cultivated land.

The hydraulic system of this slide rotary device is gearbox 3.
The hydraulic cylinder is provided in the spacer 33 and valve case 34 on the right side of the valve 1, and the hydraulic cylinder is provided in the slide outer cylinder 35 and the slide inner cylinder 36.

With the gearbox positioned in the center as shown in Figure 2,
Spacer 33, valve case 34, slide outer cylinder 35
．． 37. By replacing the slide inner cylinders 36 and 38 with the main beam, it is possible to easily convert it into a conventional non-sliding rotary tiller.

FIG. 4 is a side sectional view of the hydraulic system of the present invention.

A tilling drive shaft 54 is installed horizontally within the rotary gear box 31, and a bevel gear 71 that meshes with a bevel gear 70 that is fixed to one end of the input shaft 46 is fixed thereto.

The tilling drive shaft 54 is supported by bearings 82 and 81 on the left and right sides, has a notch in a portion protruding from the bearings 81, and is engaged with and driven by the pump shaft 55 of the hydraulic pump 56.

A penetrating oil passage 55a extends through the pump shaft 55.

Protrude the spacer 33 from the right side of the gearbox 31,
A hydraulic pump 56 is provided within the spacer 33 and attached to the left side of the valve case 34.

The filter 59 is fixed using the mating surface of the spacer 33 at the bottom of the hydraulic pump and the valve case 34.

The hydraulic oil sucked through the filter 59 is sucked into the hydraulic pump 56 through an oil path inside the valve case.

. The hydraulic fluid of this hydraulic system is rotary gear box 3
The rotary gear box 31 is protruded downward in a semicircular or triangular shape to create a hydraulic oil reservoir and increase the amount of hydraulic oil.

The hydraulic oil is connected to the spacer 33 by a communication port 33a provided at a position lower than the oil level 83 to send the hydraulic oil to the filter 59 section.

A pump relief valve 60 is provided on the upper surface of the hydraulic pump 56, and a bolt 84 is screwed into the opening of the spacer 33.
By removing it, the relief pressure of the relief valve 60 can be adjusted from the outside using a screwdriver or the like.

The valve case 34 houses a rotary valve 58 therein in a direction perpendicular to the pump shaft 55, and has an oil passage carved therein that connects the hydraulic pump 56, the rotary valve 58, the cylinder 61, etc.

In addition to arranging the oil passage, the valve case 34 also serves as a support for the hydraulic pump 56, the hydraulic cylinder 61, and the slide outer cylinder 35.

Rotary valve 58 is operated by valve link 57.

The pressure oil whose direction is controlled by the rotary valve 58 is guided to the right or left side of the piston 62 in the cylinder 61.

It enters the left side, the protruding side of the piston 62, through the oil passage 34b, and enters the right side, the retraction side of the piston 62, through the oil passage 61a.

The oil passage 61a utilizes a gap created by concentric circles between the cylinder 61 and the cylinder outer cylinder 61b.

The cylinder 61 is fixed by fixing the base of the cylinder outer cylinder 61b to the right side surface of the valve case 34 while being fitted into a seal body 61c welded and fixed to the tip of the cylinder outer cylinder 61b.

A protrusion 34c for inserting the cylinder 61 is provided on the right side surface of the valve case 34, and the left end of the cylinder 61 is inserted into the protrusion 34c and fixed.

Also, the oil passage 34a is located near the outlet of the oil passage 34b within the protrusion 34c.
is provided, and an overload relief valve 80 is provided in the oil passage.

The pressure oil blown out from the overload relief valve 80 flows through the oil passage 55a provided in the pump shaft 55 to the gear box 3.
Escape to 1.

If you use the cylinder to not only slide the rotary tiller but also operate other movable parts such as the rear cover, groove cutter, tail wheel, etc., use the valve case 3.
It is also possible to provide a hydraulic pressure circle 0 or a carryover outlet in 4 to take out the hydraulic pressure, and operate it using a rotary valve or a stack valve installed in parallel.

A sliding rod 63 is fixed to the piston 62, and the sliding rod 63 is fixed to the side plate 47'.

FIG. 5 is a sectional view taken along the line A-A in FIG. 4.

The hydraulic oil sucked by the filter 59 enters between the pump gears 56a through the oil passage 34d of the valve case 34 from the track 59a.

The direction of the pressurized hydraulic oil is controlled by the rotary valve 58 when it flows to the oil path 34e, when it flows to the oil path 34f, and when it returns to the gear box 31 from the oil path 56b at the neutral position.

The oil passage 34e communicates with the oil passage 34b in the cross-sectional view and works to project the piston 62, and the oil passage 34f communicates with the oil passage 34b in the cross-sectional view.
The piston 62 is then operated to the retraction side.

The valve link 57 is connected to a valve lever 57a, and the rotary tiller is slid by operating the valve lever 57a.

The valve lever 57a is guided to the tractor's dash hood by a Bowden wire and can be remotely controlled.

FIG. 6 is a drawing showing the left side support part of the gearbox.

The tillage drive shaft 54 has a spline portion 54a at its left end, and is slidably engaged with an inner diameter spline portion 85a provided at the right end of the side case shaft 85.

A slide inner cylinder 3B is provided to cover the spline engagement portion.

In a conventional rotary tiller, the side case and the gearbox are connected by a main beam that looks like the inner slide cylinder and the outer slide cylinder are fixed into one, and the tiller drive shaft 54 is inserted through the main beam to the inside of the side case 28. Therefore, the strength was sufficient and the rotary tilling device did not rotate at the slide support part, but since it was supported slidably, it became rotatable, so the slide support inner cylinder 40 and the slide holding outer cylinder 41 It provides support and reinforcement and prevents the rotary tiller from rotating around the tiller drive shaft.

As described above, in the present invention, the valve case 34 is attached as a lid to one side of the rotary gear box, the inside of the rotary gear box is used as an oil bath, and the slide pressure oil cylinder 61 is attached to the outer side of the valve case. The valve case 34 also serves as a support for the slide outer cylinder 35, and further passes through the fitting support protrusion 34c of the hydraulic cylinder 61 to form the protruding side of the hydraulic cylinder 61. An oil passage connecting the oil pressure port of the rotary gear box and the oil bath of the rotary gear box is configured in the valve case 34, and an overload relief valve 8 is installed in the oil passage.
Since 0 is provided, the following effects are obtained.

Firstly, when the tilling section of the slide rotary tilling device is slid and the side plate touches an obstacle, the overload relief valve blows out, allowing pressurized oil to escape and preventing damage to the main parts of the device. It is.

Second, valve case 3 is attached to the side of the rotary gear box.
4 is fixedly installed as a lid body and the inside thereof is used as an oil bath communicating with the rotary gearbox, and the outer wall of the valve case is used as a slide outer cylinder and a support for the hydraulic cylinder.
The oil bath and hydraulic cylinder can be easily assembled and installed.

Thirdly, the valve case is composed of the lid of the rotary gear box, the support of the hydraulic cylinder, and a part of the hydraulic cylinder, so if a through hole is provided in the valve case, it will become a drain hole. An overload relief valve can be provided, and the shortest oil path can be configured to arrange the overload relief valve.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of an agricultural tractor equipped with the slide rotary device of the present invention, Fig. 2 is a plan view of the slide rotary device of the present invention, Fig. 3 is a plan view of the slide rotary device of the present invention in a state in which it has been slid slightly to the right, and Fig. 4 5 is a cross-sectional view of the hydraulic device on the right side of the rotary gear box, FIG. 5 is a cross-sectional view taken along line A--A in FIG. 4, and FIG. 6 is a cross-sectional view of the left side of the rotary gear box. 60...Pump relief valve, 61...
...Cylinder, 62...Piston, 80...
...Overload relief valve.

Claims (1)

[Scope of utility model registration request] Valve case 3 on one side of the rotary gearbox
4 as a cover, the inside of the rotary gear box is used as an oil bath, and the outer surface of the valve case is provided with a protrusion 34c for fitting and supporting the slide pressure oil cylinder 61. It also serves as a support for the cylinder 35, and also serves as a support projection 3 for fitting into the hydraulic cylinder 61.
4c, an oil passage connecting the protruding side hydraulic port of the hydraulic side cylinder 61 and the oil bath of the rotary gear box is configured in the valve case 34, and an overload relief valve 80 is provided in the oil passage. A slide rotary tilling device characterized by the following: