JPH0220882Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cover device for a rotary tiller.

(Prior art) For example, a cover device for a forward/reverse rotary tiller is provided with a front cover in addition to a rear cover, and in the case of Atsupakatsu tiller in which the claw shaft is reversed, both the front and rear covers are required. However, for downcut tillage, the front cover is unnecessary.

(Problem to be solved by the invention) Therefore, in the past, the front cover was removed when cultivating with a downcut, but it was very troublesome to attach and detach, and it was lost when the mounting member was removed. Something happened.

In view of these problems with conventional devices, the present invention has been developed to allow the front cover to be bent and held in engagement by lifting the lower part upwards without removing the front cover when not in use. It is an object of the present invention to provide a cover device for a rotary tiller configured so that it can be easily removed from the side of the machine frame.

(Means for Solving the Problems) A specific configuration for solving the problems in the present invention includes a main cover 18 that covers the upper part of the tilling section 11 and a pair of left and right front covers 41 that cover the front sides of the machine frame 10. The left and right front covers 4 are fixed to the main cover 18.
In a cover device for a rotary tiller, the front cover 26 is provided with a front cover 26 that covers the front of the tiller 11 between the tillers 11 and 11. A reinforcing member 29 is attached to the lower part of the reinforcing member 29 over the entire width above the lower end, and this reinforcing member 29 is provided with a protrusion 53 that protrudes outward from the left and right front covers 41. cover 41
A receiving recess 54 that receives the protrusion 53 to hold the front cover 26 in the working position and an engaging recess 55 that engages the protrusion 53 to hold the front cover 26 in the upwardly lifted position are formed.

(Function) When cultivating with the rotary tiller 9, the front cover 26 made of a rubber plate is placed in the working position and the protrusion 53 is received in the recess 54 to control the vertical and backward movements of the lower part of the front cover 26. Mud is prevented from scattering forward from the tilling part 11 in a regulated state.

The front cover 26 is prevented from deforming in the width direction by the reinforcing member 29, and the lower end of the front cover 26 is located below the reinforcing member 20, so even if a stone falls, it can escape and be easily removed. can be brought closer to the ground.

When down-cutting tillage with the rotary tiller 9, the lower part of the front cover 26 is lifted upward from the outside of the left and right front covers 41 via the protrusions 53, the protrusions 53 are engaged with the engagement recesses 55, and the front cover 26 is
Hold it in an upward lifting position.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 to 3, 1 is a tractor body, 2 is a hydraulic system for raising and lowering the working machine, and has a lift arm 3, 4 is a rear wheel, and 5 is a three-point link mechanism.
It consists of a top link 6 and a lower link 7, and the lower link 7 is connected to a lift arm 3 via a lift rod 8, and a rotary tiller 9 is attached to the rotary tiller 9 for traction.

The rotary tiller 9 is of a side drive type and is capable of forward and reverse rotation, and includes a machine frame 10, a tiller section 11, and a cover device 12 that covers the tiller section 11.

The machine frame 10 is formed into a gate shape with support arms 13b integrally projecting from the gear case 13a on the left and right sides, and a side frame 13c and a transmission case 13d provided at the outer ends of the left and right support arms 13b. A rearwardly protruding support frame 14 is supported on the machine frame 10 so as to be rotatable about a horizontal axis, and a pair of gauge wheels 15 are provided at both rear ends of the support frame 14.

The tiller 11 is supported by a claw shaft 16 rotatably around a horizontal axis between the lower ends of the machine frame 10 and a bracket 33 implanted therein so as to be swingable at a constant angle via a bolt 34. This tilling claw 17 is a claw that can till the soil by rotating in either forward or reverse direction.The solid line posture in Figure 1 indicates the reverse rotation, and the imaginary line posture indicates the normal rotation. The forward/reverse direction of 16 is a forward/reverse mechanism (not shown) inside the gear case 13a.
Switched by.

The cover device 12 is attached to the bracket 3 on the machine frame 10.
6, a rear cover 19 is pivoted to the rear end of the main cover 18 and can be bent vertically, and a rear cover 19 is fixed to the front end of the main cover 18 in a downwardly inclined shape. front cover 26
and a pair of front and rear side covers 20 and 41 on the left and right, respectively, which are fixed to the main cover 18.

The rear cover 19 is elastically held at a predetermined height by a bullet lowering mechanism 21, and its lower end is bent forward and downward to form an L-shaped scraper portion 51, and the rear cover 19 is bent downward from the middle of its back surface. A pressing body 52 made of an elastic body such as rubber is provided.

This rear cover 19 uses a scraper part 51 to scrape off the convex parts of the soil surface after tilling, fills in the concave parts, and then smooths it out with a pressing body 52, and performs the leveling work by applying conventional leveling pressure. Compared to the rear cover, there is less pressure, so water absorption in the field is better.
Ground leveling performance is also improved.

A Reiki rod 49 is disposed approximately along the outer periphery of the tilling section 11 between the rear cover 19 that covers the rear of the tilling section 11 and the tilling section 11. The Reiki rod 49 is made by welding a large number of circular arc rods 49b in parallel to a strip plate 49a, and connects the main cover 18 via bolts 50.
It is fixed to the bottom surface of the tilled soil, and it crushes and separates the tilled soil into layers, forming a field with finely ground soil in the surface layer and large soil lumps in the lower layer.

Reference numeral 22 denotes a rear auxiliary cover, and numeral 45 denotes a front auxiliary cover, which are pivoted to the respective side covers 20 and 41 with a pivot 23, and are attached to each side cover 20 and 41 with an arcuate hole 24 and a bolt 25 so that their vertical positions can be adjusted. It is being

The front cover 26 is formed of a flexible elastic plate such as a rubber plate, and its upper part 26a is connected to the main cover 1.
8 through a backing plate 27 and bolts 28.

A reinforcing member 29 and a backing plate 30 having a triangular cross section are fixed to the lower part 26a of the front cover 26 slightly above the lower end over the entire length in the width direction via bolts 31 so as to sandwich the front cover 26. ing.
This reinforcing member 29 may be attached to the lower part 26b by baking, and it is not limited to a triangular shape, but may be a rectangular shape or a strip plate. Bars are fixed to both ends of the reinforcing member 29 to form protrusions 53.

A pair of left and right front covers 41 are part of the side frame 1.
3c and the transmission case 13d via bolts, and has a receiving recess 54 and an engaging recess 5 on its outer periphery.
5 is formed so that a protrusion 53 protruding outward from the front cover 26 to the left and right can be locked.

As shown in FIG. 3, the receiving recess 54 is designed to prevent the lower part 26b of the front cover 26 in the working position from hanging down directly below the upper part 26a and coming into contact with the tilling claws 17.
It also has a receiving part 54a that supports the protrusion 53 so that it does not move up and down, and an arcuate guide part 54b that smoothly guides the movement of the protrusion 53 to the receiving part 54a. If the receiving recess 54 forms at least a receiving part 54a to prevent the front cover 26 from hanging down, it is possible to hold the front cover 26 in the working position and prevent soil from scattering from the tilling part 11. can. The working posture of the front cover 26 is tilted forward downward.

As shown in FIG. 4, the engagement recess 55 is for holding the front cover 26 in an upwardly lifted position (retracted position) during downcut cultivation.
It is formed into a hook shape that can be engaged with the protrusion 53 of b.

The front cover 26 is opened by lifting its lower part 26b.
When the lower part 26a is bent in half and moved above the main cover 18, and the protrusions 53 on both sides of the lower part 26a are engaged with the engagement recesses 55, the engagement is stopped by the repulsive force of the elastic plate. maintained and the lifting position is maintained.

5 and 6 show modified examples of this engaging recess 55. The first modified example shown in FIG. 5 is an engaging recess 55' formed on the upper edge of the front cover 26.
has a backward hook shape, which can more reliably prevent the protrusion 53 from coming off naturally than the forward hook shape of the previous embodiment.

FIG. 6 shows a second modified example of the engagement recess 55, and also allows the posture of the front cover 26 to be maintained more reliably. That is, the protrusion 53 and the front cover 26
A spring 57 is tensioned between the protrusion 53 and the protrusion 53 to constantly pull the protrusion 53 toward the front cover 41 side.
The engagement recess 55 is a recess that opens upward, and the projection 53 is maintained in a locked state by the tensile force of the spring 57.

By providing the spring 57, the receiving recess 54 and the engagement recess 55 can retain the protrusion 53 by simply forming a recess, and the protrusion 53 can be easily removed. , even if the elasticity of the front cover 26 decreases, the posture is maintained;
In particular, the mechanism for holding the lifted position can be made permanent.

The present invention can also be applied to center drive type rotary tillers, in which case the front and rear covers 2
0 and 41 are integrally attached to the main cover 18, but the rest of the structure is the same as that of the previous embodiment.

(Effect of the invention) According to the invention detailed above, the front cover 26
Even if the projection 53 is made of a rubber plate, the projection 53 does not fit into the receiving recess 5.
The engagement recess 55 is made of a rubber plate and lifts and locks the protrusion 53.
Since the projection 53 is formed in the front cover 41, the projection 53 can be bent to the upward lifting position without being removed when not in use.Also, since the protrusion 53 protrudes outward from the front cover 41, the position can be changed without removing the front cover 41.
The front cover 2 can be easily attached by holding the protrusion 53 from the outside, increasing work safety.
6 has a reinforcing member 29 at the lower part that spans almost the entire width, so there is no deformation in the width direction, and it is possible to reliably prevent mud from scattering.Furthermore, since the lower end of the front cover 26 is located below the reinforcing member 29, The lower end can be brought as close to the ground as possible, allowing you to escape even if there are obstacles such as stones.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is an overall side view, FIG. 2 is a perspective view, and FIG. 3 is a sectional side view showing the front cover in a working position. Figure 4 is a cross-sectional side view showing the front cover in the upwardly lifted position, and Figure 5 is the first part of the engaging recess.
FIG. 6 is a side view showing a modification. FIG. 6 is a cross-sectional side view showing a second modification of the engagement recess. 9...Rotary tiller, 10...Machine frame, 11...
... Cultivation section, 12 ... Cover device, 18 ... Main cover, 26 ... Front cover, 41 ... Front cover,
53...Protrusion, 54...Receiving recess, 55...Engagement recess.

Claims (1)

[Scope of claim for utility model registration] Main cover 1 that covers the top of the tilling section 11 on the machine frame 10
8 and a pair of left and right front covers 41 that cover the front side parts, and the left and right front covers 41 are fixed to the main cover 18.
In a cover device for a rotary cultivator, which is provided with a front cover 26 that covers the front of the tiller 11 between the tillers, the front cover 26 is formed of a bendable rubber plate, and its upper part is fixed to the front of the main cover 18. At the same time, a reinforcing member 29 is attached to the lower part of the reinforcing member 29 over the entire width above the lower end, and this reinforcing member 29 is provided with a protrusion 53 that protrudes outward from the left and right front covers 41. 41
A receiving recess 54 for receiving the protrusion 53 to hold the front cover 26 in the working position and an engaging recess 55 for locking the protrusion 53 in order to hold the front cover 26 in the upwardly lifted position are formed therein. Cover device for rotary tiller.