JP2000092916A - Pto shaft protective apparatus for tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject apparatus designed to prevent the input shaft section of a working device linked to the rear side of a tractor from acting as a gathering resistance as a result of coming close to soil surface during operation and contacting with soil, weeds and the like. SOLUTION: This apparatus has such a scheme that, a working device 2 linked to the rear portion of a vehicle body 1 is allowed to interlock with a PTO shaft 3 and the vehicle body 1 or a link 5 in front of the PTO shaft 3 is equipped with a device 4 for displacing soil under PTO shaft 3 passage area. Owing to the above scheme, the working device 2 mounted via the link 5 on the rear portion of the tractor vehicle body 1 is allowed to descend on the soil surface when being in operation and can work by being driven through interlocking with the PTO shaft 3; with the working posture, although the rear end of the PTO shaft 3 descends to a low level, the soil displacing device 4 displaces soil surface to an appropriate depth on the front side and the descending position of the PTO shaft 3 is located on the soil surface as the trace after soil is displaced with the device 4; therefore it is possible to reduce gathering soil and weeds and the like by maintaining the rear end of the PTO shaft 3 or the input shaft portion of the working device 2 at a given height above the soil surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a tractor PT
The present invention relates to a PTO shaft protection device that prevents a mud, straw grass, or the like from being raked up by an O-axis interlocking portion.

[0002]

When a work machine such as a rotary tilling device is connected by a connecting link such as a three-point link on the rear side of a tractor body, the work machine is lowered to a working posture. At this time, the input shaft portion of the working machine to which the PTO shaft is linked is in a state of approaching the field scene, the upper surface of the ridge, or the like.

For this reason, if weeds or the like grow on the upper surface of the ridge, or if there is an embankment portion, the weeds and soil are swept forward by the input shaft portion and the rear end portion of the PTO shaft to form a dumpling. Will be combined.

[0004]

According to the present invention, a working device 2 connected to a rear portion of a vehicle body 1 is interlocked with a PTO shaft 3, and
The vehicle body 1 to the connecting link 5 in front of the PTO shaft 3 have a PTO shaft protection device configuration of a tractor which is provided with an earth discharging device 4 for discharging soil below the PTO shaft 3 passing portion.

[0005]

The working device 2 mounted on the rear of the tractor body 1 via the connecting link 5 can be lowered to the soil surface at the time of work and driven by the PTO shaft 3 to work. In this working posture, the rear end of the PTO shaft 3 descends to the lower position. On the front side, the earth discharging device 4 discharges the soil surface to an appropriate depth, and the lowering position of the PTO shaft 3 is adjusted by the earth discharging device 4. Place on the soil surface where the soil was removed.

For this reason, the rear end of the PTO shaft 3 or the input shaft of the working device 2 is maintained at a constant height above the soil surface,
The raking of soil and weeds can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A tractor body 1 has a front wheel 6 and a rear wheel 7. The front wheel 6 is steered by operating a steering handle 8, and is driven by an engine 9 mounted on the front. I can run. Reference numeral 10 denotes a cockpit, and reference numeral 5 denotes a connecting link constituted by a lower link at the rear. The connecting link is lifted and lowered by being connected to a lift arm 11 and a lift rod 12 which are vertically turned by hydraulic pressure.

Reference numeral 13 denotes a top link, and 14 denotes a hitch connected to the connection link 5 and the rear end of the top link 13.
Mast pin 15 of working device 2 consisting of a rotary tilling device
Alternatively, the lower pins 16 can be engaged and connected. Working device 2
Is mounted on a cultivating shaft 18 on which a cultivating claw 17 is disposed, and is driven by a rotation of an input shaft 20 on the front side of a central input transmission case 19 through a transmission mechanism of a side transmission case 21 to be capable of tilling. It is a drive-type tilling device.

Reference numeral 22 denotes a tillage cover, 23 denotes a rear cover on the rear side, and 24 denotes a gauge wheel. Till cover 22
Can be adjusted to move back and forth depending on the plowing depth and the like by a telescopic rod 26 with the mast 25. Reference numeral 27 denotes a damper rod provided between the bracket on the cultivation cover 22 and the rear cover 23. Reference numeral 28 denotes a telescopic rod for adjusting the gauge wheel 24.

The earth remover 4 is provided at the center between the connecting links 5 composed of a pair of left and right lower links, and is disposed immediately below the PTO shaft 3 and in front of the input shaft 20 and has a ridge A soil surface. The cultivator is configured to cultivate B and discharge it to the left and right. The PTO shaft 3 is linked via a universal joint, a telescopic shaft, and the like from the rear end central portion of the vehicle body 1 to the rear input shaft 20. A cover for preventing winding may be formed on the outer periphery of the PTO shaft 3.

At the time of non-work, the connecting link 5 and the top link 13 are rotated upward by the lift of the lift arm 11, so that the working device 2 can be raised to a non-work position above the soil surface. In operation, the lift arm 11 is lowered, the tilling claw 17 is positioned at an appropriate depth on the soil surface, and tilling can be performed in conjunction with the PTO shaft 3. When the working device 2 is lowered, the earth remover 4 scrapes the soil surface before tilling, discharges the soil to the side, and maintains the soil surface on the lower side where the input shaft 20 passes at a constant depth.

The earth remover 4 is mounted via a connecting link 5 and is moved up and down together with the working device 2. 3 is different from the above example in that the earth remover 4 is attached to the abdomen of the vehicle body 1, and in the form of a groove cutter, the front boss portion 29 is provided.
Is mounted on a bracket or the like at the lower part of the vehicle body 1 so as to be vertically rotatable with a pin 32. Further, a lever 31 is provided on the step floor 30 so that the earth discharging device 4 can be moved up and down, moved down during work, and moved up during storage to approach the lower surface of the vehicle body 1.

In place of such a lever 31, an electric telescopic cylinder or the like may be used.
You may comprise so that it may turn up and down along 3 etc.
In FIG. 4, the point different from the above example is that the earth remover 4 is attached to the front end portion of the vehicle body 1, and a vertically adjustable rod 35 is attached to the front hitch 34 by inserting the boss 36 of the hitch 34 and attached and set. Fix with the pin 37.

The earth-discharger 4 is in the form of a flat plate 38 or a curved plate 39. 5 and 6, the difference from the above example is that the frame 40 having the gauge wheel 24 is vertically rotated with respect to the hitch frame 42 so that the use position C
And the storage position D. Even when the fixing pin 43 is removed during the switching rotation, the frame 40 is prevented from being detached from the hitch 42 by the retaining pin 44.

In the illustrated example, the tilling work apparatus 2 has a center drive configuration in which the transmission case 21 is disposed at the center, and left and right hitch frames 42 are tilling frames 41 extending across the side of the input transmission case 19. And can be adjusted up and down by the telescopic rod 28. At the rear end of the right and left hitch frames 42, a hitch 45 having a U-shaped cross section is provided. Inside the left and right hitches 45, the left and right portions of the frame 40 of the gauge wheel 24 made of the round pipe material are provided on the rear side. Fitted from the opening side, it can rotate around this frame 40.

Each hitch 45 is provided with a frame 40.
A pin hole that overlaps with the pin hole is formed, and the rotation of the frame 40 can be stopped by inserting the fixing pin 43 from above. Further, a pin hole into which the locking pin 44 can be inserted is formed also on the rear end side of each hitch 45, and the insertion of the locking pin 44 prevents the frame 40 from coming off the rear side of the hitch 45. 46 is a handle of the fixing pin 43.

When the gauge wheel 24 is rotated from the use position C to the storage position D, the fixing pins 43 on the left and right hitches 45 are removed, and the fixing pin is rotated while the frame 40 is rotated toward the storage position D. 43 is inserted and fixed. During this time, the outer retaining pin 44 is kept set.

[Brief description of the drawings]

FIG. 1 is a side view of a working device unit.

FIG. 2 is a side view of a tractor and a perspective view of a dumping unit thereof.

FIG. 3 is a side view showing a partly different embodiment, and a side view, a front view, and a plan view of an earth removal device.

FIG. 4 is a side view showing a partly different embodiment, a partly perspective view,
The side view and perspective view which show the Example of an earth removal device.

FIG. 5 is a side view of a tillage device showing a partly different embodiment.

FIG. 6 is a plan view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Working device 3 PTO shaft 4 Earth remover 5 Connecting link

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hisashi Takahashi 1st Higashikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Within the department (72) Inventor Seiji Kinami, 1-Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Person Yasushi Goto 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. F-term in the Engineering Department (Reference)

Claims (1)

[Claims] An operating device connected to a rear portion of a vehicle body is a PTO.
A PTO shaft protection device for a tractor, which is interlocked with a shaft 3 and provided with an earth remover 4 for discharging the soil below the PTO shaft 3 passing portion from the vehicle body 1 to the connecting link 5 in front of the PTO shaft 3.