JPH0547524Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rake holding device for a forward/reverse rotary tiller.

(Prior Art) In general, a forward-reversing rotary tiller includes a main cover that covers the upper part of a tilling section that can be forward and reverse, a rear cover that covers the rear of the tilling section and is swingable about the left and right horizontal axes. It is provided with comb-shaped rake members that are located between the tilling section and the rear cover, are swingable about the left and right horizontal axes, and are arranged in a row at intervals in the tilling width direction. The rake member is swing-positioned so as to be close to the tilling section during reverse tillage to produce a soil crushing effect, and is positioned at the rear so that it can be moved away from the tillage section during forward tillage to prevent entanglement with grass, etc. It is swingingly positioned in the direction of the cover.

In addition, the rake components are suitable for fields (clay, sand).
Providing this may be effective or disadvantageous depending on the situation.

Conventionally, the above-mentioned rocking positioning of the rake member has been carried out by selectively latching the rake member to different positions of the machine frame of the tiller via a locking device, as disclosed in Japanese Patent Laid-Open No. 61-88801. This was what I was doing.

In addition, the rake member was attached and detached by tightening and loosening the bolts each time the rake member was needed.

(Problems to be Solved by the Invention) In the conventional device, it was necessary to attach and detach the hook to the machine frame every time the position of the rake member was changed, which was troublesome.

In addition, the rocking fulcrum of the rear cover and rake member is generally clogged with soil and cannot swing smoothly.
There is a problem in that soil gets stuck between the rear cover and the rake member during forward tilling.

Therefore, the present applicant proposed in Utility Application No. 61-85710 that a rake holder for holding a rake member is composed of a receiver and a support rod, and that the receiver is in a posture along the longitudinal direction of the rake and in a posture that intersects with the longitudinal direction of the rake. A technology in which a support rod is provided inside a rear cover so as to be able to freely change its posture between two positions, a support rod protrudes through the rear cover, and the receiver has a length to receive a plurality of rake members. proposed.

Although this prior art technique is useful in its own way, it still uses nuts to fix the rake member in each position, making tightening the nuts indispensable and troublesome.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The technical measures taken by the present invention to solve the problems of the prior art are characterized by: , a rear cover 10 that covers the rear of the tilling section 3 and is swingable about the left and right horizontal axes, and the tilling section 3 and the rear cover 1.
and comb-shaped rake members 17 that are located between the rear cover 10 and the rear cover 10, are swingable about the left and right horizontal axes, and are arranged in rows at intervals in the tilling direction. A rake holder 35 is rotatably provided on the opposite side of the tilling section 3 to hold the rake member 17 in a position along the rear cover 10 side. and a holding part 38 that supports the rake member 17 by intersecting with the rear cover 10. The main feature is that a lock pin 42 is provided which can be switched and fixed to the posture B held on the outer surface side of the cover 10.

(Function) To secure the rake member 17 along the rear cover 10, use the lock pin 4 in the rake holder.
2, rotate the operating part 37 around the rotation fulcrum 36, change the holding part 38 by rotating it from posture A to posture B in the example of FIGS. 3 and 4, and fix it again with the lock pin 42. done by doing.

(Example) In FIG. 7, a rotary tiller 1 connected to a tractor (not shown) via a three-point link is of a side drive type and can be rotated in forward and reverse directions. , and a cover device 4 that covers the tilling section 3.

A rearwardly protruding support frame 5 is supported on the machine frame 2 so as to be rotatable around a horizontal axis, and a gauge wheel 6 is provided at the rear end of the support frame 5.

The tilling section 3 consists of a side frame and a chain case 7.
The tilling claw 8 is provided with a claw shaft supported rotatably around a horizontal axis between the lower end portions of the claw shaft, and a tilling claw 8 supported via a bolt so as to be swingable at a constant angle on a bracket installed on the claw shaft. The claw shaft is interlocked and connected to the gear case via the chain in the chain case 7 and the transmission shaft in the support arm, so that the tilling claws 8 can till in either forward or reverse direction. The forward and reverse rotation of the pawl shaft is switched by a forward and reverse rotation mechanism inside the gear case.

The cover device 4 includes a main cover 9 and a rear cover 1.
0, includes left and right side covers 11 and a front cover 12.

The main cover 9 covers the top of the tilling section 3 and is fixed to the machine frame 2 via a bracket. Further, as shown in FIG. 5, inverted L-shaped mounting brackets 13 are attached along the left and right side walls of the main cover 9 in a downwardly extending manner.

The left and right side covers 11 are attached to the mounting bracket 13 and extend downward from the left and right side edges of the main cover 11 to cover the left and right outer sides of the tilling section 3.

The rear cover 10 covers the rear of the tilling section 3, as shown in FIGS. 1 and 2. The rear cover 10 is pivotally supported by the left and right side covers 11 at the rear end position of the main cover 9 on a bridge-shaped first left and right horizontal shaft 14, and is swingable about the horizontal shaft center P. Further, the rear cover 10 is held so as to be swingable within a predetermined range by a holding rod 16 which is elastically attached to the machine frame 2 via a spring 15 so as to be vertically movable.

A comb-shaped rake member 17 located between the tilling section 3 and the rear cover 10 is connected to the second left and right horizontal shafts 18.
It is supported by and swingably provided around the horizontal axis center Q. The second left and right horizontal shafts 18 are the left and right guide covers 11
The horizontal axis center P of the rear cover 10 is an eccentric horizontal axis center Q, and this horizontal axis 18
A rake mounting bracket 19 is fixed to the bracket 19, and a rake member 17 is fixed to the bracket 19. The rake member 17 is a large number of U-shaped rods arranged side by side at predetermined intervals in the left and right direction.
The character rod is mounted in a pinched manner between a holding plate 20 and a bracket 19 via bolts and nuts 21.

Furthermore, semicircular elastic bodies 22 are fixed to the left and right ends of the bracket 19.

The soil scattered from the tilling section 3 is deposited between the respective horizontal axis centers P and Q and the tilling section 3 on the rear cover 10.
A prevention cover 23 is provided at each swing fulcrum portion of the rake member 17 to prevent it from becoming clogged. This samurai cover 23 is attached to the U-shaped member 2 as shown in FIG.
It is fixed via 4.

Reference numeral 25 denotes a rake member swing operating device provided on each outer surface of the left and right side covers 11, and a mounting plate 26 attached to the outer surface of the side cover 11.
The left and right outer ends of the first and second left and right horizontal shafts 14 and 18 are passed through this plate 26, and a locking nut 27 is screwed into the through end of the first left and right horizontal shaft 14 (a fifth (see figure). In addition, the second left and right horizontal axis 18
A base end of a driven arm 28 is fitted into the penetrating end of the driven arm 28 so as not to be relatively rotatable, and is fixed via a nut 29. Further, a support shaft 30 is protruded from the mounting plate 26 outwardly on the left and right, and the operation arm 3 is attached to this support shaft 30.
The base end of 1 is attached so as to be swingable about the left and right horizontal axes. Then, the operating arm 31 and the driven arm 2
Spring support shafts 32 and 33 are provided at the ends of each of the springs 8 to protrude outward from the left and right, and a tension coil spring 34 is hooked thereon. Note that the spring support shaft 32 on the operating arm 31 side is protruded inwardly in the left and right directions and serves as a gripping portion. Due to the moment based on the elastic force of the spring 34, the operating arm 31 and the driven arm 28 try to swing so that their tips approach each other, but the direction of the swing is changed due to a change in the direction of the moment based on the elastic force. Switch. That is, this switching is performed by swinging the operating arm 31 about the left and right horizontal axes, and the ends of the swing arm 31 and the driven arm 28 swing to the left in the state shown in FIG. , in the state shown in FIG. 2, it is swung to the right in the figure.

In the state shown in FIG. 6, the second left and right horizontal shaft 18 is rotated by swinging the driven arm 28 to the left in the figure, and the rake member 17 rotated along with this rotation is moved by the spring 34 to the tilling section. It is biased to swing in three directions. This rake member 17 approaches the tilling section 3 until it comes into contact with the rear end edge of the protector cover 23 and is restricted from swinging, thus becoming in a state suitable for reverse tilling. At this time, since the protector cover 23 also serves as the swing regulating section, a separate part for regulating the swing is not required.

In addition, in the state shown in FIG. 2, the second left and right horizontal shaft 18 is rotated by the swinging operation of the driven arm 28 to the right in the figure, and the rake member 17 rotated along with this rotation is moved to the rear by the spring 34. The cover is biased to swing in the direction of the cover 10. The rake member 17 comes into contact with the front surface of the rear cover 10 via the elastic body 22 and moves away from the tilling section 3 until its swinging is restricted, and is in a state suitable for forward tilling. During normal tilling, when the rake member 17 swings following the swing of the rear cover 10, the rear cover 10 and the rake member 17 come into contact because their respective horizontal axes centers P and Q are eccentric. The positions change, and the rear cover 10 and the rake member 17 move relative to each other in opposite directions perpendicular to their swing axes, and the soil stuck between the rear cover 10 and the rake member 17 is removed by scraping it off. can. In addition, the rear cover 1 when plowing in forward rotation is
0 and the rake member 17 is the rake member 17
By restricting the swinging motion of the rear cover 10, it can be made as small as possible, resulting in less soil clogging.

In FIGS. 1, 3, and 4, reference numeral 35 denotes rake holders, which are arranged as a pair on the left and right sides of the rear cover 10 on the side opposite to the tilling section 3.

The rake holder 35 consists of an operating section 37 that is rotatable about a fulcrum shaft 36 and a hook-shaped holding section 38 that extends from the middle of the operating section 37. A bracket 39 is installed upright, and the fulcrum shaft 3 is attached to this bracket 39.
6 pivots one end of the operating portion 37 around an axis in a direction intersecting the longitudinal direction of the rake member 17, and a holding portion 38 is provided within the rear cover 10 through its window 4.
0, 41, the plurality of rake members 17 are received from below by the holding part 38, and in order to maintain this holding position A, the lock pin 42 is inserted into the insertion hole 38A formed at the tip of the holding part 38. It is supported by a bracket 43.

That is, FIG. 3 shows the state of forward tilling (down cutting), in which the rake member 17 is brought close to the rear cover 10 and is received by the holding portion 38.

The operation part 37 is located at the same distance as the distance between the fulcrum shaft 36 and the position of the pin insertion hole of the bracket 43.
A pin insertion hole 44 is provided in the position A shown in FIG.
By pulling out the lock pin 42 and rotating the holder 35 in the direction of arrow C around the fulcrum shaft 36, the holder 38 can be attached to the windows 40, 41 of the rear cover 10.
By inserting the lock pin 42 into the pin insertion hole 44 and fixing it to the bracket 43 side, the cover becomes the retracted position B, and this position B
is maintained by the locking pin 42, at which point the rake member 17 is released into the up-cut position.

(Effect of the invention) The present invention includes a main cover 9 that covers the upper part of the tilling section 3 which can be forward and reverse; and comb-shaped rake members 17 which are located between the rear cover 10 and the rear cover 10 and are swingable about the left and right horizontal axes and are arranged in rows at intervals in the tilling direction. A rake holder 35 is rotatably provided on the opposite side of the cover 10 from the tilling part 3 to hold the rake member 17 in a position along the rear cover 10 side. and a holding part 38 that supports the rake member 17 in a manner that intersects with the longitudinal direction of the rear cover 10. Since the locking pin 42 is provided which can be switched and fixed between the posture B in which the rear cover 10 is released and held on the outer surface side of the rear cover 10, the following advantages are provided.

Switching and fixing the rake member 17 between the holding position A and the retreating (released) position B using the rake holder 35 can be carried out by simply inserting and removing the lock pin 42, and the changing of the position of the rake member can be done quickly and reliably. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side sectional view of the main part, FIG. 2 is a side view of the same, and FIGS. 3 and 4 are cross sections taken along the line D-D in FIG. 5 is a developed plan view of FIG. 2, FIG. 6 is a side view of the main part at the time of down-cutting, and FIG. 7 is a side view of the whole. 3... Cultivating part, 9... Main cover, 10... Rear cover, 17... Rake member, 35... Holder,
37... Operating section, 38... Holding section, 42... Lock pin.

Claims (1)

[Claims for Utility Model Registration] Main cover 9 that covers the upper part of the tilling section 3 that can be rotated forward and backward.
a rear cover 10 that covers the rear of the tilling section 3 and is swingable around the left and right horizontal axes; Comb-shaped rake members 17 are arranged in a row with intervals in the width direction, and the rake members 17 are attached to the rear cover 10 side on the side opposite to the tilling part 3 of the rear cover 10. A rake holder 35 is rotatably provided to hold the rake member 17 in a posture, and the holder 35 includes an operating portion 37 and a holding portion 38 that crosses the longitudinal direction of the rake member 17 and supports the rake member 17. A lock pin 42 is provided which can be switched and fixed between posture A in which the part 38 is advanced into the rear cover 10 and holds the rake member 17, and posture B in which it is retracted from the inside of the rear cover 10 and held on the outer surface side of the rear cover 10. A rake holding device for a forward/reverse rotary tiller.