JPH0737441Y2 - Cover device for rotary tiller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cover device for a rotary cultivator.

(Prior Art) The rear of the tillage part is covered with a rear cover, and the rear cover is a cover of a rotary tiller that is elastically biased in the grounding direction via a pressing body arranged behind the rear cover. The device is widely used.

In the cover device as described above, the rear cover has an effect of preventing crushed soil and scattering of cultivated soil, but when the soil adheres and accumulates on the front surface of the rear cover, the desired crushing effect cannot be obtained. In addition, the weight of the cultivator becomes large and the power consumption becomes large.

Therefore, it has been proposed that a rubber plate is provided on the front surface of the rear cover to prevent soil from adhering due to vibration of the rubber plate.

(Problems to be solved by the invention) Conventionally, since the rear cover is made of sheet metal, even if a rubber plate is arranged on the front surface, the vibration of the rubber plate is regulated by the rear cover and the soil adhesion is regulated. It was not possible to vibrate sufficiently, and the effect of preventing soil adhesion was not sufficient.

The present invention aims to solve the above problems.

(Means for Solving the Problem) The feature of the present invention is that the rear of the tillage part 10 is covered with a rear cover 16, and the rear cover 16 is provided with a grounding body 22 at the rear end thereof. A cover device for a rotary cultivator in which a pressing body 25 that supports the grounding body 22 so as to elastically bias the grounding body 22 in the grounding direction is arranged at the upper rear, and the rear cover 16 is formed of a flexible elastic plate. The pulling member 52 that pulls the front-rear midway portion of the rear cover 16 upward is connected between the rear cover 16 and the pressing body 25.

According to the present invention, the rear cover is a flexible elastic plate, and the tension member pulls the middle portion in the front-rear direction upward, so that the rear cover is tensioned. When the plowing soil collides, it vibrates and effectively prevents the soil from adhering to the front surface of the rear cover.

(Example) FIG. 2 shows a side-drive rotary cultivator 1, which is mounted on a tractor (not shown) via a three-point link mechanism, and includes a gear box 2 and left and right outwards from the gear box 2. The projecting support arm 3 is provided. A power receiving shaft 4 projects forward from the gear box 2, and a transmission shaft 5 interlockingly connected to the power receiving shaft 4 via a gear in the gear box 2 is fitted in the support arm 3. A chain case 6 is attached to the left end of the support arm 3, and a side frame (not shown) is attached to the right end thereof, and the lower end of the chain case 6 and the lower end of the side frame support the pawl shaft 7 at both ends. . A plurality of tillage claws 8 are detachably attached to the outer circumference of the claw shaft 7. In addition, a chain winding transmission mechanism that interlocks the transmission shaft 5 and the pawl shaft 7 is built in the chain case 6.

Then, the lower link of the three-point link mechanism is attached to the support arm 3 and the top link is attached to the top mast 9 provided on the support arm, whereby the rotary tiller 1
Is connected to the tractor, and is also interlockingly connected to the PTO shaft of the tractor and the power receiving shaft 4 via a universal joint. As a result, the rotary cultivator 1 is pulled by the tractor, and the pawl shaft 7 is rotationally driven by the rotational power of the PTO shaft, so that the cultivating unit 10 that cultivates the cultivating pawl 8 is configured. A gauge wheel 11 is connected to the support arm 3 so as to be vertically movable, and an adjusting mechanism 12 adjusts the vertical position.

As shown in FIG. 1, the upper part of the plowing part 10 is covered by the main cover 13, the lateral parts by the left and right rear side covers 14, the left and right front side covers 15, the chain case 6, the side frame, and the rear part by the rear cover. Each is covered by 16.

The main cover 13 is made of sheet metal, is fixed to the support arm 3, and is formed by joining an upper plate 17 and a lower plate 18.

The left and right side covers 14, 15 are made of sheet metal and are fixed to the main cover 13 and the chain case 6 or the side frame.

The rear cover 16 is formed of a flexible rubber plate. The rear cover 16 is integrally formed with a front extending portion 19 extending to the vicinity of the front end of the main cover 13. The rear end of the tension coil spring 20 is attached to the front end of the front extension portion 19, and the front end of the tension coil spring 20 is attached to the front end of the main cover 13.

Further, below the main cover 13, a plurality of rod-shaped scrapers 21 on the left and right in the axial direction are juxtaposed in the front-rear direction. Each scraper 21
Is a side view triangle, and both ends are rotatably supported by the left and right side covers 15 and 16, the chain case 6, and the side frame. The front extension 19 of the rear cover 16 is sandwiched between the scraper 21 and the lower surface of the main cover 13.

A grounding body 22 is attached to the rear end of the rear cover 6. The grounding body 22 is formed by joining the upper and lower plate members 23 and 24 into a hollow shape, and the front end thereof holds the rear end of the rear cover 16. The lower end of the pressing body 25 is rotatably attached to the grounding body 22 about the horizontal axis 26.

A pair of pressing bodies 25 are provided on the left and right sides, and are mainly configured by a first member 27, a second member 28, a third member 29, and a fourth member 30, respectively.

The first member 27 is formed by joining the left and right plate members 31 and 32 together, and as shown in FIGS.
It is swingably attached to the center of 33. That is, the horizontal shaft 33 is supported in the space between the rear ends of the upper and lower plates 17 and 18 of the main cover 13 via a plurality of supporting pieces 34, and a notch 35 is formed in a part of the upper plate 17 of the main cover 13. The lower end of the first member 17 is inserted through the notch 35, and is rotatably fitted on the horizontal shaft 33.

The second member 28 has a cylindrical shape with a lower opening, and its front end portion is the first member.
It is fixed between the left and right plate members 31, 32 of 27.

The third member 29 has a cylindrical shape, and its upper end is inserted and fixed to the rear end of the second member 28. A reinforcing plate 36 is provided between the second member 28 and the third member 29.

The fourth member 30 has a cylindrical shape, and the upper end side of the fourth member 30 is fitted in the third member 29 so as to be relatively movable in the axial direction. And this third,
A positioning mechanism for the relative position of the fourth members 29, 30 is provided. That is, as shown in FIG. 3, a plurality of upper and lower concave grooves 37 are formed on the outer periphery of the fourth member 30, and a pin holding concave portion 38 faces the concave groove 37 on the inner periphery of the third member 29. Is formed. Then, by inserting the pin 39 between the concave portion 38 and any one of the concave grooves 37, the third member 29 and the fourth member 30 are inserted.
The relative movement of is regulated and the positioning is performed. The pin 39 is L-shaped, and a retaining pin 40 can be inserted and removed at one end.

The lower end of the fourth member 30 has a circular shape in a side view, is located between the left and right brackets 41 and 42 on the upper surface of the grounding body 22, and is attached via the horizontal shaft 26 as described above.

The pressing body 25 is biased around the horizontal axis 33 by the biasing mechanism 43. That is, the left and right plate members 31, 32 of each first member 27
A spring receiver 44 is rotatably mounted between the spring receivers 45, and a support rod 46 is loosely inserted in the spring receiver 44. The front end of the support rod 46 is the support arm 3
Is rotatably mounted on the horizontal axis 47. Further, on the support rod 46, spring pressing bodies 48 and 49 are respectively fitted to the front and rear positions of the spring receiving body 44 so as to be axially movable and positionably fixed, and the spring receiving body 44 and each spring pressing body 48, 49. The compression coil springs 50 and 51 are externally fitted between the compression coil springs 50 and 51. This allows
The rear cover 16 is elastically biased in the ground contact direction by the biasing mechanism 43 via the pressing body 25. The biasing force can be changed and adjusted by moving and positioning the spring pressing bodies 48, 49.

Then, the rear cover 16 and the pressing body 25 disposed above the rear cover 16
A tension coil spring (tensile member) 52 is connected between
The middle portion of the rear cover 16 in the front-rear direction is pulled upward (upward rearward). The tension coil spring 52 is attached to the reinforcing plate 26 for the pressing body 25, and is attached to the spring mounting piece 53 for sandwiching the rear cover 16 with respect to the rear cover 16.

The grounding body 22 includes a pair of left and right grounding angle adjusting levers.
54 is swingably attached to the center of the horizontal axis 55. The lever 54 is a combination of the left and right plate members 56, 57, and the pressing body 25
The left and right plate members 56, 57 are externally fitted to the fourth member 30 and have a plurality of hook holes 58 communicating with each other. This hook hole
A pin 59 hooked on 58 is projected from the fourth member 30, and a spring (not shown) for urging the lever 54 in the hooking direction between the pin 59 and the hooking hole 58 (the arrow direction in the drawing). Is fitted on the horizontal shaft 55. As a result, the lever 54 is swung against the elastic force of the spring, and the pin 59 is selectively locked in the locking hole 58, whereby the grounding angle of the grounding body 32 is changed and adjusted. In addition,
The left and right levers 54 are connected by a connecting rod 60.

In the rotary cultivator 1, the soil cultivated by the tiller 10 and scattered to the rear collides with the rear cover 16. Then, the rear cover 16 is a flexible elastic plate, and
Since it is pulled upward by 52 and is in a tension state, soil does not adhere due to vibration.

Further, since the front end of the front extending portion 19 of the rear cover 16 is pulled by the spring 20, vibration due to plowing and rear cover 16
When the soil intermittently collides with 16, the front extension 19 vibrates back and forth. Then, scraper 21
Scrapes off the soil attached to the lower surface of the front extension 19.

[Brief description of drawings]

1 is a side sectional view of a cover device of a rotary cultivator, FIG. 2 is a side view of the rotary cultivator, FIG. 3 is a rear view of the same, and FIG. 4 is the same. It is a partial top view. 10 …… tillage part, 16 …… rear cover, 25 …… pressing body, 52 ……
Spring.

Claims (1)

[Scope of utility model registration request] 1. A rear cover (16) covers the rear of the cultivating part (10), and the rear cover (16) has a grounding body (22) at the rear end thereof. A cover device for a rotary cultivator in which a pressing body (25) for elastically urging the grounding body (22) in the grounding direction is arranged, wherein the rear cover (16) is flexible and elastic. A pulling member (52) formed of a plate is connected between the rear cover (16) and the pressing body (25) to pull the middle portion of the rear cover (16) in the front-rear direction upward. Cover device for rotary tiller.