JPH0491701A - Cover device of rotary power tiller - Google Patents

Abstract

PURPOSE:To release an engaging part by a locking means by forming an outward projecting ratching part on the outside of an elastic cover and a ratching part on the inside of a plate cover and installing a locking means having a locking plate to be movably brought into contact with the engaging part meshed with the ratching part. CONSTITUTION:An elastic cover 14 is set in a stretched state through a gap T along the inside of a plate cover attached to a rotary machine frame 5 so as to cover a tilling part 8 and the front, the rear and the middle parts of the elastic cover 14 are fixed to the plate cover 15. Outward projecting engaging parts 26A and 27B are formed on at the front and the rear, the middle parts on the outside of the elastic cover 14 and the inside of the plate cover 15 is provided with a locking means 32 which brings a locking plate 36 movably to ratching parts 26B and 27B meshed with the engaging parts 26A and 27A and the engaging parts 26A and 27A meshed with the ratching parts 26B and 27B and prevents release of the engaging parts. When a lever 39 of the locking means 35 is rotated, the locking plate 36 is advanced, brought into contact with the engaging parts 26A and 27A to prevent release of the engaging parts 26A and 27A.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cover device for a rotary tiller having an elastic cover.

(Prior art) As a conventional technology of this type, Utility Model Application No. 52-136007
There is a method disclosed in the issue bulletin, in which an elastic cover is placed on the inner surface of a steel plate cover fixed to the rotary machine frame, and this elastic cover is bolted to the steel plate cover at the front, rear and midway parts.
It is configured to be slack between the fixed positions, and this slack portion absorbs the impact of scattered soil and prevents soil from adhering.

(Problems to be Solved by the Invention) The elastic cover of the prior art has through-holes for fixing bolts to the iron plate cover, and cracks may occur from the through-holes, and the sagging portions may break with the iron plate cover. Although there is a gap between them, it cannot be installed in a tensioned state, and the fixed part is in direct contact with the steel plate cover, and if a stone etc. collides, even the slack part may come into contact with the steel plate cover. The elastic cover may be subjected to impact or crushed by the stone and the iron plate cover, and
The elastic cover must be fixed with a large number of bolts, and the work of attaching and detaching the elastic cover is extremely troublesome.

An object of the present invention is to form an outwardly protruding engaging part on the outer surface of an elastic cover, form a locking part that engages with the engaging part on the inner surface of the plate cover, and form a locking part that engages with the locking part. A locking means having a locking plate that is movably abutted on the engaging portion is provided, and the elastic cover is attached by the engagement of the engaging portion and the locking portion,
It is an object of the present invention to provide a cover device for a rotary tiller in which a gap is formed by protruding an engaging part and the engaging part can be disengaged by a locking means.

(Means for Solving the Problems) A specific configuration for solving the problems in the present invention is to attach a plate cover 15 that covers the tilling section 8 to the rotary machine frame 5, and to attach the plate cover 15 to the inner surface side of the plate cover 15 with a gap T in between. elastic cover 14
This is a cover device for a rotary cultivator in which the elastic cover 14 is stretched along the front, rear and middle parts of the rotary tiller and attached to a plate cover 15, and the outer surface of the elastic cover 14 has outwardly protruding shapes at the front, back and middle parts. An engaging portion is formed on the inner surface of the plate cover 15, and a locking portion that engages the engaging portion, and a lock plate 36 is movably abutted against the engaging portion that engages with the engaging portion. A locking means 35 is provided for preventing the engagement portion from disengaging.

(Function) The elastic cover 14 has front and rear engaging portions 26Af on the outer surfaces of the main plate cover-corresponding portion 26 and the rear plate cover-corresponding portion 27, respectively.

27Af, 26Ag, 27Ag and intermediate engagement portion 26Af
, 27Af project outwardly. Front desk section 26A
All the parts except f are engaged in the same direction, and the locking parts 26B and 27B on the inner surface of the main plate cover 11 and the rear plate cover 12
The tips of the respective engaging parts are inserted from behind to engage with each other, and the front engaging part 26Af is engaged with the front engaging part 26Bf formed by the front edge of the main plate cover 11 from the front. be done.

When the locking means 35 provided on the plate cover 15 is activated, that is, when the lever 39 is rotated, the lock plate 3
6 advances and comes into contact with the engaging portions 26A and 27A.

It is held between the locking parts 26B and 27B, and the engaging part 26A,
Prevent 27A from leaving.

A gap T approximately corresponding to the amount of protrusion of the engaging portion is formed between the plate cover 15 and the elastic cover 14, and the elastic cover 14 is attached in a tensioned state, so that when mud collides with its inner surface, it becomes elastic. It bounces back and crushes the soil, and if there is mud attached to it, it is brushed off.

(Example) Embodiments of the present invention will be described below based on the drawings.

In Fig. 6, ■ is a tractor-mounted rotary tiller, in which left and right support arms 3 are protruded from a central gear case 2, and a transmission case 4 and a side frame are fixed to the outer ends of each support arm 3. A frame 5 is formed, and a claw shaft 6 is supported rotatably around a horizontal axis at the lower part of the transmission case 4 and the side frame, and a plurality of tilling claws 7 are attached to this claw shaft 6 to form a tilling section 8. .

A cover device 10 that covers the tilling section 8 is attached to the rotary machine frame, and the cover device 10 includes a main plate cover 11 that covers the upper part of the tilling section 8, a rear plate cover 12 that covers the rear part, and a front cover that covers the front part. 13, front and rear side plate covers (not shown) that cover the left and right front and rear sides, and an elastic cover 14 arranged on the inner surface side (the tilling part 8 side) of the main/rear plate cover 11 and 12.

In FIGS. 1-5, reference numeral 15 indicates a plate cover including a main plate cover 11 and a rear plate cover 12, and is formed of an iron plate or a reinforced plastic plate.
1a, llb, left and right sides q 11. c and front and rear 11d.

The left and right side walls 11c are fixed to the transmission case 4 and the side frame. The main plate cover 11 is gradually thinned from the front and back to the middle part, and is formed so that the diameter of the tilling section 8 can be made larger.

The rear plate cover 12 is formed by fixing a reinforcing wall 12b to the front upper part of the main wall 12a, and fixing a plurality of reinforcing ribs 12c to the outer surface in the tilling width direction (horizontal direction). The front upper part of the plate cover 12 is connected via a pivot 16, and the rear lower part of the rear plate cover 12 can be moved up and down.

A triangular notch 18 for arranging a culture medium is formed at the center of the rear lower part of the rear plate cover 12, and when the culture medium is not in use, it is closed by attaching a removable triangular plate 19. Further, rear gauge relief notches 20 are formed on the left and right sides of the rear lower part, and are closed by auxiliary plates 21 when the rear gauge wheel is not in use.

A support arm 23 is protruded rearward from the left and right support arms 3 via a bracket 22, and an equalizing pressure adjusting means 24 is provided between the rear end of this support arm 23 and the reinforcing rib 12c of the rear plate cover 12. There is.

The elastic cover 14 is mainly made of rubber or elastic synthetic resin, and is in the form of a sheet. As shown in FIG. 3, the middle part of the sheet part in the thickness direction is made of synthetic resin such as polyamide resin or natural fiber. The covered hood cloth is arranged in a sandwich to form a three-layer structure consisting of elastic layers 14a, 14a and reinforcing layers 1.4b, which allows for easy elastic deformation but little expansion and contraction, making it durable. ing. The reinforcing layer 14
It is desirable that the hood cloth b is plain woven and its front and rear tensile strength is set higher than that of the left and right ones.

Further, a large number of engaging portions A are formed on the outer surface of the elastic cover 14. This engaging part A is made of the same material as the elastic layer 14a and has a high hardness, for example, when the elastic fii 14a is made of synthetic rubber with a JIS hardness of around 35 degrees, the engaging part A is made of a material with high hardness.
Using synthetic rubber with a temperature of around 0 degrees Celsius, it is formed into piece-shaped blocks and joined together using vulcanization adhesives, etc.

It can be molded in a short time using a mold.

The elastic cover 14 has a main plate cover-corresponding part 26 facing the inner surface of the main plate cover 1 and a rear plate cover-corresponding part 27 facing the inner surface of the rear plate cover 12.
In order to swing rearward and upward, the pivot portion 16 is butted at the opposing portion.

The engaging portion 26A provided on the outer surface of the main plate cover corresponding portion 26 in an outwardly protruding manner has front and rear engaging portions 26Af, 26Ag and at least one intermediate engaging portion 26Ah, each of which has approximately the entire length. The front engaging portion 26A is formed to have a length spanning the plowing width.
The engagement groove af of f is opened in the front-back direction opposite to the engagement grooves ag and ah of the other engagement portions 26Af and 26Ah, and faces each other. Further, protrusions 28 having substantially the same height as the engaging portion 26A are formed on the left and right sides of the main plate cover-corresponding portion 26.

The respective engaging portions 26Af, 26 are provided on the inner surface of the main plate cover 11.
Locking portions 26Bf and 268g correspond to Ag and 26Ah.
, 26Bh are formed. The front locking part 26Bf is formed by overlapping the front edges of the upper and lower parts 911a and 1.1b, and is engaged with the front engaging part 26Af from the front. The rear locking portion 26Bg and the midway locking portion 26Bh are formed by welding or gluing an S-shaped plate material to the main plate cover 11, and a plurality of short pieces are provided at intervals in the plowing width direction. The corresponding engaging portions 26Ag and 26Ah are engaged from behind.

Note that a restraining plate 29 is provided at the front of the upper wall 11a of the main plate cover 11.
A front cover 13 made of an elastic material is attached via bolts 30, and the front engaging portion 26Af is held between the front edge of the main plate cover 11 and the restraining plate 29 together with the front cover 13. This prevents the main plate cover-corresponding portion 26 from shifting in the left-right direction with respect to the main plate cover 11. The protruding portion 28 can prevent the rear portion of the main plate cover-corresponding portion 26 from shifting significantly from side to side.

Also on the outer surface of the rear plate cover corresponding portion 27, engaging portions 27Af are provided at the front and rear portions (more precisely, the front upper and rear lower portions) and the midway portion.

27'Ag and 27Ah are provided in an outwardly protruding shape, the front engagement part 27Af is formed to have a length that spans approximately the entire tilling width, and the rear engagement part 27Ag and the intermediate engagement part 27Ah are short in the tilling width direction. A plurality of these are provided at intervals in the plowing width direction.

The inner surface of the rear plate cover 12 has respective engaging portions 27Af and 27A.
Locking portions 27Bf, 278g, 27 correspond to g27Ah.
Bh is formed.

In addition, side engaging portions 27A1 are formed on the left and right side portions of the outer surface of the rear plate cover-corresponding portion 27, and the side engaging portions 27A1 are continuous from front to back and midway.
A notch engaging portion 27Am is also formed on the side of the triangular notch 18, and correspondingly, a locking portion 2 is formed on the rear plate cover]2.
7Bl and 27Bm are formed.

The rear plate cover corresponding part 27 engages with the locking part 27B from the rear except for the side engaging part 27A1, and the side engaging part 27A1
are engaged with the locking portion 27B1 from the left and right outer sides.

Since the elastic cover 14 has a protruding engaging portion A between it and the plate cover 15, a gap T is formed by approximately the amount of the engaging portion A, and in order to form the gap T, Since there is no need to slacken the elastic cover 14, the side of the elastic cover 14 facing the tilling section 8 can be in a tensioned state, albeit in a polygonal shape.

In this elastic cover 14, the main plate cover-corresponding part 26 and the rear plate cover-corresponding part 27 are formed integrally, that is, from the front edge to the rear edge of the plate cover 15, but they may be formed separately. You can also do it.

The front engaging part 27Af of the rear plate cover corresponding part 27 has the same engaging direction as the other engaging parts 27Ag and 27Ah,
The front engaging part 27Af may be set in the opposite direction like the front engaging part 26Af, and especially when each corresponding part 26.27 is formed separately, the front engaging part 27Af is set in the same engaging direction as the front engaging part 26Af. It is preferable to fix it to the rear plate cover 12 with a fastener.

The rotary tiller 1 is exemplified as a down-cut type, and most of the engaging portion A of the elastic cover 14 is connected to the locking portion B.
However, in the case of the upper cut type, most of the engaging portions A may be configured to be engaged from the front. In that case, the rear attendant stands 26Ag, 27Ag
is engaged from behind, contrary to the other engaging parts.

Since the elastic cover 14 is fixed to the plate cover at the distal end side in the engagement direction, the engagement portion A can be held by simply engaging with the locking portion B, but the locking means 35 to prevent separation is required.
It is configured such that it can be engaged and held more reliably.

The locking means 35 is attached to a nut member 37 on the lower surface of the plate cover 15.
is welded, and the threaded body 38 is screwed onto this nut member 37,
Fitting the lever 39 and the waveform leaf spring 40 to the screw body 38,
A lock plate 36 is pivotally supported on one end of the lever 39, and a stopper 41 for locking the other end of the lever 39 is fixed to the lower surface of the plate cover 15.

The lever 39 can be rotated while receiving the frictional resistance of the plate spring 40, and when in the position indicated by the two-dot chain line in FIG.
6 is pulled away from the locking part B, the locking part A can be freely engaged and disengaged from the locking part B, and when the lever 39 is rotated to the solid line position with the locking part B in the engaged state, lock plate 36
advances toward the locking part B side and comes into contact with the engaging part A, clamping the engaging part A together with the locking part B, and preventing the engaging part A from coming off.

The stopper 41 has a stopper surface 41b behind the inclined surface 41a.
When the lever 39 is moved from the two-dot chain line position in FIG. 4 to the solid line position, the lever 39 moves to the M position as shown in FIG.
rides up from the U surface 41a and engages with the stopper surface 41b,
Return movement is prevented.

In FIG. 1, the locking means 35 is a locking portion 26Bh.

Although it is arranged opposite to 27Bf and 27Bg, it may be arranged at other locking portions B, and it may be arranged at appropriate locking portions B in the plowing width direction as well. In addition, the locking part 27B
Although a fixed retaining portion 31 is provided opposite to h, such a fixed retaining portion 31 may be provided at a position where it is difficult to install the locking means 35, such as at a bent portion of the plate cover 15.

FIG. 7 shows an example of an elastic cover 33 for the triangular plate 19, and the elastic cover 33 has a substantially triangular frame-shaped engagement portion 33B.
It is fitted and attached to the periphery of the triangular plate 19. Incidentally, elastic covers are attached to the auxiliary plate 21 and the left and right side plate covers on the tilling portion 8 surface.

It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways. For example, the main plate cover 11 and the rear plate cover 12 may be formed from a single plate connected to each other, the sheet-like portion of the elastic cover 14 may be formed from one or two layers, or a high-hardness rubber similar to that of the engaging portion A may be used. The locking portion B may be made longer in the plowing width direction to also serve as reinforcement for the plate cover 15, the main plate cover 11 may be provided with a retaining portion for the rear engaging portion 2BAg, or each plate cover 1. The locking portion B may be formed by partially cutting out L12 and bending it toward the inner surface.

Figures 8-10 show an example of a chain tightener mounting structure provided in the transmission case 4, and 45 is a candy plug 4B.
This is a downwardly sloping fuel filler port that is opened and closed by a cylinder, and a cylinder 47 is inserted into the back of the filler port. The cylindrical body 47 is attached by a stepped portion 45a of the oil filler port 45 and a snap ring 48.

A U-shaped member 49 is fixed inside the cylindrical body 47, and one end of a tightener 51 is connected to this U-shaped member 49 via a bottle 50. The other end of the tightener 51 is in contact with a recess 52 formed in the wall surface of the transmission case 4.

This recess 52 is formed on the inclined surface 5 so that it becomes narrower toward the center in the width direction.
It has 2a.

In the above-mentioned tightener mounting structure, the tightener mounting hole is connected to the oil filler port 4.
5 can be used for both purposes, no machining is required, inspection and replacement of the tightener 51 is easy, and the recess 52 allows the tightener 51 to be
The position can be set.

(Effects of the Invention) According to the present invention described in detail above, the elastic cover 14 is stretched along the inner surface of the plate cover 15 with a gap T in between, and the outer surface of the elastic cover 14 is attached to the front and rear surfaces. An outwardly protruding engaging portion A is formed in the middle, and a locking portion B that engages the engaging portion A is formed on the inner surface of the plate cover 15, so that the elastic cover 14 is a plate cover. 15, the durability can be improved since no bolt through holes are formed, and the gap T can be formed by the protrusion of the engaging portion A, making it possible to install the device in a tensioned state. Further, the cocking means 35 is actuated to advance the lock plate 36 to the engaging part A that has engaged with the locking part B, and the locking plate 36 is brought into contact with the engaging part A, whereby the engaging part A is released. In addition, when the lock plays 1 and 36 are retracted, the locking part B
The engaging part A can be easily engaged and disengaged from the engaging part A.

[Brief explanation of the drawing]

1-7 show an embodiment of the present invention, FIG. 1 is a cross-sectional side view of the main part, FIG. 2 is a plan view of the elastic cover and the locking part, and FIG. 3 is 111 in FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a view taken along the V arrow in FIG. 4, FIG. 6 is a side view of the rotary tiller, and FIG. 7 is a triangular plate. Fig. 8-10 shows an example of the chain tightener mounting structure, Fig. 8 is a cross-sectional side view of the main part, Fig. 9 is a partially cutaway perspective view of the elastic cover for 10 is a sectional view taken along the line XX of FIG. 8. DESCRIPTION OF SYMBOLS 1... Rotary tiller, 5... Rotary machine frame, 8... Tilling part, 10... Cover device, 11... Main plate Cover 12...
Rear plate cover, 14...Elastic cover, 15...
...temporary cover 35...--locking means, 36.
...Lock plate, A...Engagement part, B
...Locking part, T...Gap. Patent: Ganto Hatake, Representative of Ripota Co., Ltd.
Person Patent Attorney Yasu 1) Toshio Figure 2

Claims (1)

[Claims] (1) A plate cover (15) covering the tilling section (8) is attached to the rotary machine frame (5), and an elastic cover (14) is stretched on the inner surface of the plate cover (15) with a gap (T) in between. This is a cover device for a rotary tiller in which the elastic cover (14) is attached to a plate cover (15) at the front, rear, and middle portions of the elastic cover (14). A lock plate (36) is formed on the inner surface of the plate cover (15), and a lock plate (36) is formed on the inner surface of the plate cover (15). 1. A cover device for a rotary tiller, characterized in that a locking means (35) is provided which prevents the engagement portion from disengaging by abutting the locking means (35) so as to be able to move forward and backward.