JPH03280801A - Rotary tiller cover device - Google Patents

Abstract

PURPOSE:To provide the title device so designed that an externally projected hooking part is formed outside an elastic cover, and a latching part to be hooked with the hooking part is formed inside a board cover, thereby making a setting hooking between the hooking part and latching part and forming a space through the projection of the hooking part. CONSTITUTION:A rotary machine frame is fitted with a board cover 15 covering a tilling section, and the inside of the board cover is fitted with an elastic cover 14, through a gap alpha, at its front, rear and intermediate part in a tensioned state. An externally projected hooking part A formed outside the elastic cover is hooked on a latching part B formed inside the board cover.

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 above publication, 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, back and middle parts, and is not slackened between the fixing positions. This slack portion absorbs the impact of scattered soil and prevents soil from adhering to it.

(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, so if a stone etc. collides, even the slack part may come into contact with the steel plate cover, causing a shock to the steel plate cover. The elastic cover may be crushed by the stones and the iron plate cover, and it must be fixed with a large number of bolts, making it very troublesome to attach and detach the elastic cover.

A first object of the present invention is to form an outwardly protruding engaging part on the outer surface of the elastic cover, and to form a locking part that engages with the engaging part on the inner surface of the plate cover, so as to prevent the installation from occurring. An object of the present invention is to provide a cover device for a rotary tiller, in which a gap can be formed by protruding the engaging part by engaging the engaging part with the engaging part.

A second object of the present invention is to more reliably attach the elastic cover to the plate cover by reversing the engagement direction of the front and rear engaging portions with respect to the other front and rear engaging portions and the midway portion. It is an object of the present invention to provide a cover device for a rotary tiller that allows the use of a rotary tiller.

A third object of the present invention is to arrange an integral or separate elastic cover on each inner surface of the main plate cover and the rear plate cover, and to correspond to the front, rear and middle parts of the main plate cover corresponding portion of the elastic cover and the rear plate cover. By making the engaging part at the front part of the section long enough to span almost the entire plowing width, and by making the engaging parts at the rear and middle parts of the rear board cover corresponding part short and providing multiple parts in the plowing width direction, The object of the present invention is to provide a cover device for a rotary tiller in which the attachment of an elastic cover is strengthened, and the soil crushing performance, soil removal performance, and drainage performance of the rear plate cover corresponding portion are improved.

(Means for Solving the Problems) A first specific configuration for solving the problems in the present invention is to attach a plate cover 15 covering the tilling section 8 to the rotary machine frame 5, and to attach the plate cover 15 to the inner surface of the plate cover 15. This is a cover device for a rotary tiller in which an elastic cover 14 is stretched along a gap α, and the front and rear and middle portions of the elastic cover 14 are attached to a plate cover 15. An outwardly protruding engaging portion is formed in the middle of the plate cover 15, and a locking portion for engaging the engaging portion is formed on the inner surface of the plate cover 15.

In the second specific configuration, in addition to the first specific configuration, the engagement portion on one of the front and rear sides of the elastic cover 14 and the locking portion of the plate cover 15 that engages with it are the engagement portions on the other front and back, respectively. The engaging direction of the locking portion, the intermediate engagement portion, and the intermediate locking portion is set to be opposite in the front and rear directions.

The third specific configuration is that a main plate cover 11 that covers the upper part of the tilling section 8 is attached to the rotary machine frame 5, and a rear plate cover 12 that covers the rear of the tilling section 8 is attached to the rear of the main plate cover 11 so as to be able to swing up and down. Attachment: Place the integral or separate elastic cover 14 from the front inner surface of the main plate cover 11 to the rear inner surface of the rear plate cover 12 along each plate cover 1L12 with a gap α, and then attach the elastic cover 14 to the main plate cover corresponding portion. 26 and a rear plate cover corresponding part 27 are attached to each plate cover 11.12, and the outer surface of each corresponding part 26.27 of the elastic cover 14 has front and rear and middle parts. An outwardly protruding engaging portion is formed in the middle part, and a locking part that engages with each engaging part is formed on the inner surface of each plate cover LL12, and the front and rear and midway engaging parts of the main plate cover corresponding part 26 are formed. In addition, the front engagement part of the rear plate cover corresponding part 27 is formed to have a length that spans approximately the entire tilling width, and the rear and middle engagement parts of the rear plate cover corresponding part 27 are formed to have a length that is short in the tilling width direction. A plurality of them are provided in the width direction.

(Function) The elastic cover 14 has front and rear engaging parts 26Af and 27 on the outer surfaces of the main plate cover corresponding part 26 and the rear plate cover corresponding part 27, respectively.
Af, 26Ag, 27Ag and intermediate engagement portion 26Ah,
27Ah in an outwardly projecting shape. Front engagement part 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 each engaging portion are inserted from behind to engage, and the front engaging portion 26Af is engaged from the front to a front locking portion 26Bf formed by the front edge of the main plate cover 11. do.

A gap α 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.

The elastic cover 14 only engages with the plate cover 15,
The attachment/detachment work is easily performed, and since the front engagement part 26Af is in the front-back direction opposite to the other engagement parts, the elastic cover 14 is prevented from easily coming off from the plate cover 15, and is also given tension.

Front and rear engaging parts 26Af, 26Ag of main plate cover corresponding part 26
The midway engaging portion 26Ah and the front engaging portion 27Af of the rear plate cover corresponding portion 27 have a length that spans approximately the entire plowing width, allowing the elastic cover 14 to be reliably attached to the plate cover 15, Rear engaging portion 27Ag of rear plate cover corresponding portion 27, 2
7Ah are arranged at intervals in the plowing width direction, and enable elastic deformation of the elastic cover 14 even between the engaging parts 27A in the plowing width direction, improving soil crushing and soil removal performance. Since a gap α is also formed between the engaging portions 27A in the direction, even if cleaning water or the like enters, it is easily drained.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 3, reference numeral 1 is a tractor-mounted rotary machine frame machine, 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 machine frame 5 is formed, 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. There is.

The rotary machine frame 5 is provided with a cover device lO that covers the tilling section 8.
The cover device 10 includes a main plate cover 11 that covers the top of the tilling section 8, a rear plate cover 12 that covers the rear, a front cover 13 that covers the front, and front and rear side plate covers that cover the left and right front and rear (not shown). ) and an elastic cover 14 disposed on the inner surface side (the tilling section 8 side) of the main/rear plate cover 1112.

In FIGS. 1 to 4, 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, Ilb, left and right side walls 11c, and front and rear portions 11d.

11e, etc., and the left and right side walls lie 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, 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 cultivator is formed at the center of the rear lower part of the rear plate cover 12, and is closed by attaching a removable triangular plate 19 when the cultivator is not in use. Further, rear gauge wheel escape 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 composed of rubber or elastic synthetic resin, and has a sheet shape, as shown in FIG. The formed hood cloth is arranged in a sandwich pattern to form a three-layer structure consisting of the elastic layers 14a, 14a and the reinforcing layer 14b, which allows for easy elastic deformation but not much expansion and contraction.
It is designed to be durable. The reinforcing layer 14b
It is desirable that the hood cloth is plain woven and its front and rear tensile strength is set higher than that of the left and right.

Further, a large number of engaging portions A are formed on the outer surface of the elastic cover 14. This engaging portion A is made of a material that is the same as the elastic layer 14a and has high hardness, for example, the elastic layer 14a is made of JIS hardness 3.
When using synthetic rubber with an angle of around 5 degrees, the engaging part A is 70 degrees.
It is made of front and rear synthetic rubber, formed into hook-shaped blocks, and bonded together using vulcanization adhesive, etc., and can be molded in a short time using a mold.

The elastic cover 14 has a main plate cover corresponding portion 26 facing the inner surface of the main plate cover 11 and a rear plate cover corresponding portion 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 in an outwardly protruding shape on the outer surface of the main plate cover corresponding portion 26 has front and rear engaging portions 26Af, 26Ag and at least one or more intermediate engaging portions 26Ah, each of which is approximately fully engaged. The engagement groove af of the front engagement part 26Af is opened in the front-back direction opposite to the engagement grooves ag and ah of the other engagement parts 26Ag and 26^h, and faces each other.

Further, engaging portions 26 are provided on the left and right sides of the main plate cover corresponding portion 26.
A protrusion 28 having approximately the same height as A is formed.

Each of the engaging portions 26^f+26 is provided on the inner surface of the main plate cover 11.
Ag.

Locking portions 26Bf, 268g, corresponding to 26^h,
26Bh is formed. The front locking portion 26Bf is formed by overlapping the front edges of the upper and lower walls 11a and llb.
The front engaging portion 26Af is secured from the front. The rear locking portion 26Bg and the midway locking portion 26Bh are formed by welding or gluing S-shaped plates to the main plate cover 11, and a plurality of short ones are provided at intervals in the plowing width direction. The corresponding engaging portions 26^g 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. Projection part 2
8 can prevent the rear portion of the main plate cover corresponding portion 26 from shifting significantly from side to side.

The chevron-shaped member located on the rear side of the midway engaging portion 26Ah forms a retaining portion 31 fixed to the main plate cover 11, and prevents the engaging portion 26A from disengaging from the locking portion 26B.

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

27Ag and 27Ah are provided in an outwardly protruding shape, the front engagement part 27Af is formed in a length covering approximately the entire plowing width, and the rear engagement part 2
A plurality of the 7Ag and intermediate engaging portions 27Ah are provided at intervals in the plowing width direction, each having a short length.

The inner surface of the rear plate cover 12 has respective engaging portions 27Af and 27A.
g.

Locking parts 278f, 278g, 2 corresponding to 27^h
7Bh and a retaining portion 31 are formed.

In addition, side engaging portions 27A2 are formed on the left and right side portions of the outer surface of the rear plate cover corresponding portion 27, and are continuous to the front, back, and midway portions.
Notch engaging portions 27Am are also formed on the sides of the triangular notch portion 18, and correspondingly, a locking portion 2 is formed on the rear plate cover 12.
7B 1 and 27Bn+ are formed.

The rear plate cover corresponding portion 27 engages with the locking portion 27B from the rear except for the side engaging portions 27Af, and the measuring and searching portions 278! is engaged with the locking portion 27B Il from the left and right outer sides.

Since the elastic cover 14 has the engaging portion A that protrudes between it and the plate cover 15, a gap α is formed by approximately the protruding amount of the engaging portion A, and in order to form the gap α, the elastic cover 14 Since it is not necessary to make the cover 14 slack, the side of the elastic cover 14 facing the tilling section 8 can be kept in a tensioned state, although it has a polygonal shape.

In this elastic cover 14, the main plate cover corresponding part 2e and the rear plate cover corresponding part 27 are integrally formed, that is, integrally formed from the front end to the rear end of the plate cover 15, but they can also be formed separately.

The front engaging portion 27Af of the rear plate cover corresponding portion 27 has the same engaging direction as the other engaging portions 27^g, 27^h, but is engaged in the opposite direction like the front engaging portion 26Af. Also good,
In particular, when forming each of the corresponding parts 26 and 27 separately, it is preferable to set the front engagement part 27Af in the same engagement direction as the front engagement part 26Af and fix it to the rear plate cover 12 with a stopper. .

The rotary tiller l 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 engaging parts 26Ag, 27A
g engages from the rear, contrary to the other engaging parts.

FIG. 5 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 side surfaces of the tilling section 8 on the auxiliary plate 21 and the left and right side plate covers as well.

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 tilling 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 11. 12 may be partially cut out and bent toward the inner surface to form the locking portion B and the retaining portion 31.

(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 α, and the outer surface of the elastic cover 14 is attached to the front and rear and An outwardly protruding engaging portion A is formed in the middle of the plate cover 15, and a locking portion B that engages the engaging portion A is formed on the inner surface of the plate cover 15. It is extremely easy to attach and detach to the
can be formed and installed in a tensioned state.

Furthermore, the engagement portions on one of the front and rear sides of the elastic cover 14 and the locking portions of the plate cover 15 that engage with it are connected to the engagement portions and locking portions, and the intermediate engagement portions and intermediate locking portions on the other front and rear, respectively. ,
Since the engaging direction is set in the opposite direction, the engaging portions A have a detachment prevention function, and the elastic cover 1 is attached to the plate cover 15.
4 can be attached more securely.

Furthermore, the plate cover 15 is connected to the main plate cover 11 and the rear plate cover 12.
An engaging portion 26A is formed in the main plate cover corresponding portion 26 and the rear plate cover corresponding portion 27 of the elastic cover 14 corresponding to each other.
, 27A are provided, a plurality of short engaging portions 27Ag and 27Ah are provided in the plowing width direction, and the other engaging portions 26A and 27A are provided with approximately the full plowing width. By making the elastic cover 14 more securely attached to the plate cover 15, it is possible to improve the soil crushing and evacuation performance in the rear plate cover corresponding part 27, and also to make the double-force bar 12. Even if water enters between 14, it can be easily removed and the water can be prevented from reaching the pivot portion 16 between the main plate cover 11 and the rear plate cover 12.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, where Figure 1 is a cross-sectional side view of the main part, Figure 2 is a plan view of the elastic cover and the locking part, and Figure 3 is a side view of the rotary tiller. Figure, Figure 4 is Figure 1■
FIG. 5 is a partially cutaway perspective view of the elastic cover for the triangular plate. 1- rotary tiller, 5- rotary machine frame, 8 tilling section, 10=- cover device, 11- main plate cover, 12 rear plate cover, 14- elastic cover, 15- plate cover, 16 pivot, 26 main plate cover Corresponding part, 27-rear plate cover corresponding part, 31-removal prevention part, A-engaging part, B-1, locking part, α-
gap.

Claims (3)

[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 (α) 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 cover device for a rotary tiller, characterized in that an engaging portion is formed in the shape of a protrusion, and a locking portion for engaging the engaging portion is formed on an inner surface of the plate cover (15). (2) The front and rear engaging portions of the elastic cover (14) and the locking portions of the plate cover (15) that engage with the elastic cover (14) are the front and rear engaging portions and locking portions, the midway engaging portions, and the midway engaging portions, respectively. The cover device for a rotary tiller according to claim 1, wherein the engaging direction is set opposite to the front and rear with respect to the locking portion. (3) Attach the main plate cover (11) that covers the top of the tilling section (8) to the rotary machine frame (5), and attach the main plate cover (11) to the rotary machine frame (5).
A rear plate cover (12) that covers the rear of the tilling section (8)
is attached so as to be able to swing up and down, and an elastic cover (14), integrated or separate, is installed from the front inner surface of the main plate cover (11) to the rear inner surface of the rear plate cover (12), with gaps between each plate cover (11) and (12). (α) along the main plate cover corresponding part (26) and rear plate cover corresponding part (27) of this elastic cover (14).
) is attached to each plate cover (11), (12) at the front, rear, and middle parts of the rotary tiller, and the outer surface of each corresponding part (26, 27) of the elastic cover (14) is and an outwardly protruding engaging part is formed in the middle part, and a locking part that engages with each engaging part is formed on the inner surface of each plate cover (11) (12), and the main plate cover corresponding part (26 )
Front and rear and midway engaging parts and rear plate cover corresponding part (27)
The front engaging portion of the rear plate cover corresponding portion (27) is formed to have a length extending substantially over the entire tilling width, and the rear and middle engaging portions of the rear plate cover corresponding portion (27) are provided with a plurality of short lengths in the tilling width direction. A cover device for a rotary tiller, characterized in that: