JPH083204Y2 - Rotary tillage cover device - Google Patents

Description

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

(Prior Art) In a rotary cultivator, when the soil scattered from the cultivating part adheres to the main body cover that covers the outer periphery of the cultivating part, the cultivating performance deteriorates. Therefore, in order to prevent soil adhesion, conventionally,
As an elastic prevention cover provided on the inner surface side of the cultivated part,
There is one described in Japanese Utility Model Publication No. 52-136007. This is a structure in which a plurality of elastic soil-proof covers are fixed to the main body cover with bottles, and a plurality of slack portions formed by vertically slackening the elastic soil-proof covers are formed. It was intended to prevent soil from adhering to the ground due to the impact.

(Problems to be solved by the invention) In the above-mentioned conventional one, since the elastic soil-proof cover is slackened, the restoring force of elastic deformation of the slack portion due to the impact of scattered soil is weak, and the soil The effect of dropping out was not sufficient. Moreover, the weight of the apparatus is increased by the amount of the elastic soil-proof cover.

Therefore, the present invention aims to improve the soil-adhesion-preventing effect and to reduce the weight of the device.

(Means for Solving the Problem) The technical means taken by the present invention to achieve the above-mentioned object is that a rear cover 21 is pivotally attached to a rear end portion of a main cover 20 which covers the upper part of the tilling part 4, An elastic soil-proof cover 48 having flexibility is provided on the inner surface side of the rear cover 21, and a portion of the rear cover 21 corresponding to the soil-proof cover 48 is formed as an opening 43, so that tension is applied to the soil cover 48 on the rear cover 21. A rotary tilling cover device provided with a biasing mechanism 58 for fixing the upper and lower sides of the soil-proof cover 48 to the rear cover 21,
A tension member 52 pivotally supported by the urging mechanism 58 on the outer surface side of the rear cover 21 and having one end connected to the upper and lower sides of the soil protection cover 48.
And a tension spring 57 between the tension member 52 and the rear cover 21.
It is equipped with and.

(Operation) When the soil scattered from the tilling part 4 hits the elastic soil-proof cover 48, the elastic soil-proof cover 48 resists the biasing force of the biasing mechanism 58 through the opening 43 of the main body cover 17 due to this impact. Elastically bends and is restored to its original shape by its own restoring force and the biasing force of the biasing mechanism 58. The soil-proof cover 48 vibrates by repeating the above-mentioned action, and the vibration prevents the soil from adhering, and causes the adhering soil to fall off. Further, the weight of the device is reduced by the opening 43 of the main body cover 17.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a rotary cultivator, which is mounted on a tractor (not shown) via a three-point link mechanism 2 so as to be able to move up and down. The rotary cultivator 1 is a side drive type,
The machine frame 3, the tiller 4, and the tiller cover device 5 that covers the tiller 4 are provided.

The machine frame 3 has support arms integrally protruding left and right from the gear case 6, and left and right support arms 7 are integrally protruding.
An outer side frame 8 of the left and right support arms 7 and a chain case 8 are provided to form a gate shape. A support frame 10 protruding rearward is rotatably supported on the machine frame 3 about a horizontal axis in the left-right direction, and a gauge wheel 11 is provided at the rear end of the support frame 10.
Is provided.

A claw shaft 12 is rotatably supported between the lower portions of the side frame 8 and the chain case 9, and a plowing claw is mounted on the claw shaft 12.
A claw mounting bracket 14 to which 13 is detachably mounted is planted. Then, power is transmitted from the PTO shaft of the tractor to the pawl shaft 12 via the input shaft 15 of the gear case 6, the transmission shaft 16 in the support arm 7, the winding transmission mechanism in the chain case 9, and the pawl shaft 12 rotates. Driven. The claw shaft 12 and the cultivating claw 13 constitute a cultivating part 4.

The cultivating cover device 5 includes a main body cover 17 that covers the outer periphery of the cultivating portion 4, a pair of left and right front and rear side covers 18a and 18b, and an elastic cover body 19 and an elastic soil cover 48 that are arranged inside the main body cover 17. I have it.

The main body cover 17 includes a main cover 20 and a rear cover 21 pivotally attached to a rear end portion of the main cover 20.

In FIG. 3, a main cover 20 covers the upper part of the cultivating part 4, and is formed in a U-shaped cross section from an upper wall 24 and a pair of left and right side walls 25. The elastic cover body 19 is arranged on the inner surface side of the main cover 20.

The elastic cover body 19 is formed of a flexible member such as an elastically deformable rubber plate, resin plate or cloth to prevent the soil scattered from the tilling part 4 from adhering to the inner surface of the main cover 20. The elastic cover body 19 has an upper wall 24 below the upper wall 24 of the main cover 20.
It is formed so as to have an inner surface and a gap 22 and cover almost the entire area thereof, and is arranged in a curved shape along the rotation outer peripheral locus of the tilling claw 23. A front end portion 19a of the elastic cover body 19 is fixed to a front edge portion 24a of an upper wall 24 of the main cover 20 with a bolt 26, and an intermediate portion 19b.
On the upper surface, a pair of strips 27 are arranged in the left-right direction with a front-rear space and fastened with bolts 59. Pins 28 are fixed to the left and right ends of the strip plate 27 via mounting bases 30 so as to project left and right. Further, as shown in FIG. 4, a pair of front and rear U-shaped stays 31 are fixed to the left and right side walls 25 of the main cover 20 as openings inward in the left and right direction. The pin 28 is slidably fitted.
The pin 28, the stay 31, the strip plate 27 and the like constitute a supporting means 29, and the supporting means 29 holds the gap 22 between the elastic cover body 19 and the upper wall 24. Further, the strip plate 33 is also provided in the left-right direction on the upper surface of the rear end portion 19c of the elastic cover body 19 so that the bolt 6
The pin 34 is fastened at 0, and pins 34 are provided on both left and right ends of the strip plate 33 so as to project in the left-right direction. On the other hand, the left and right side walls of the main cover 20
A pair of plates 35 is arranged on the outer side of the rear portion of the 25, and the upper rear portion of the plates 35 is attached to the side wall 25 so as to be rotatable around a pivot 36. Around the pivot 36, the main cover 20
An arcuate groove 37 is formed through the left and right side walls 25 and the left and right rear side covers 18b. And the elastic cover body
19 The pin 34 of the rear end portion 19c penetrates the groove 37 and the plate 35
The lower rear part is fixed. Further, one end of a tension coil spring 38 is hooked on the front part of the plate 35, and the other end of the coil spring 38 is hooked on the rear side cover 18b. The coil spring 38 urges the pin 34 through the plate 35 counterclockwise in FIG. 3 about the pivot 36, whereby tension is applied to the elastic cover body 19. The coil spring 3
8, the pin 34, the strip plate 33, the plate 35, etc.
Is composed.

When the soil scattered from the tilling part 4 hits the elastic cover body 19, the pin 28 of the intermediate part 19b slides forward in the groove 32 of the stay 31 along the upper wall 24 of the main cover 20, The pin 34 of the end portion 19c pivots about the pivot 36 in the clockwise direction in FIG. 3 against the biasing force of the coil spring 38, and the elastic cover body 19 approaches the main bar 20 in the phantom line in FIG. As shown, it flexes elastically in a corrugated manner in the gap 22. At this time, the pin 34 comes into contact with the end of the groove 37 to prevent the elastic cover body 19 from excessively deforming. Then, the elastic cover body 19 is restored to its original shape by the restoring force of the elastic cover body 19 and the urging force of the urging means 39, and the vibration due to the repeated elastic deformation prevents the adhesion of the soil and removes the adhered soil. Drop it off.

In FIG. 6, a support shaft 40 is laid across the rear ends of the left and right side walls 25 of the main cover 20, and a bracket 41 is rotatably provided on the support shaft 40. It is mounted so that it can swing around the spindle 40. The upper portion of the rear cover 21 is divided into upper and lower parts by cutting it from one end in the left-right direction to the other end by a considerable width, and the upper and lower members 21a and 21b are connected by the connecting members 42 at the left and right ends.
42 is an opening 43. In addition, a pair of left and right reinforcing brackets 44 are provided on the back surface of the rear cover 21 so as to cross the opening 43 vertically. A lower end of a rod 47 of a lowering mechanism 46 provided on an arm 45 protruding rearward from the support arm 7 is attached to a lower portion of the bracket 44, and the lower cover 21 is lowered by the lowering mechanism 46. There is. Further, the bracket 44 has a recessed portion facing the opening 43.

In FIG. 6, the elastic soil-proof cover 48 is made of an elastically deformable flexible member such as a rubber plate, a resin plate or a cloth, and is provided on the inner surface side of the rear cover 21 so as to close the opening 43.
The upper edge (front side) 48a of the elastic soil cover 48 is a bracket 41.
And the upper member 21a of the rear cover 21 and the bolt 49 is fastened, and the lower end portion (rear side) 48b is in elastic contact with the inner surface of the rear cover 21. Further, a band plate 50 is fastened to the lower end position of the opening 43 on the upper surface of the soil protection cover 48 in the left-right direction with bolts 51. On the other hand, a pair of left and right plates (tensile members) 52 are arranged on the outer side in the left-right direction of the bracket 44.
As shown in FIG. 7, the lower portion of 52 is mounted rotatably around a pivot 54 provided on a U-shaped stay 53 fixed to a bracket 44. A pin 55 is provided on the lower end portion of the plate 52 so as to project outward in the left-right direction, and the pin 55 is fitted on a tubular shaft 56 fixed on the strip plate 50 so as to be relatively rotatable. Further, one end of a tension coil (tensile spring) 57 is hooked on the upper end of the plate 52, and the other end of the coil spring 57 is hooked on the upper end 31 of the bracket 44. This coil spring 57 causes the pin 55 to pivot 54
As shown in FIG. 6, the elastic soil-proof cover 48 is biased counterclockwise in FIG. A biasing mechanism including the coil spring 57, the plate 52, the pin 55, the strip plate 50, and the like.
58 are configured.

When the soil scattered from the cultivating part 4 hits the elastic soil-proof cover 48, the pin 55 rotates clockwise around the pivot 54 as shown in FIG. ,
It elastically bends into a curved shape through the opening 43. At this time, the bracket 44 prevents the elastic soil cover 48 from being excessively deformed. Then, due to the restoring force of the elastic soil cover 48 itself and the biasing force of the biasing mechanism 58, the elastic soil cover 48 is restored to its original shape, and due to the vibration due to the repetition of such elastic deformation,
Prevents adhesion of soil and removes adhered soil.

(Effect of the Invention) According to the present invention, tension is applied to the soil-proof cover 48 provided on the inner surface side of the rear cover 21 by the urging mechanism 58 to prevent the soil from adhering and effectively remove the adhering soil. After being made possible, the prevention cover 48, the tension member 52 of the biasing mechanism 58, and the tension spring 57.
Since the rear cover 21 and the like are provided, even if the angle of the rear cover 21 with respect to the main cover 20 changes, the prevention cover 48
The function of preventing the above can be stably maintained, and the rear cover 21 can be assembled to the main cover 20 while these are provided on the rear cover 21, and the assembling can be facilitated.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is an overall side view, FIG. 2 is a plan view of a cover device, FIG. 3 is an enlarged side sectional view of a main cover, and FIG. Fig. 3 is a sectional view taken along the line IV-IV, Fig. 5 is a sectional view taken along the line VV of Fig. 3, Fig. 6 is an enlarged side sectional view of an essential part, and Fig. 7 is Fig. VII-VII. FIG. 1 ... Rotary tiller, 4 ... tiller, 5 ... cover device, 21 ... rear cover, 43 ... opening, 48 ... elastic soil cover, 58 ... biasing mechanism.

Claims (1)

[Scope of utility model registration request] 1. A main cover (20) for covering an upper part of a tilling part (4).
A rear cover (21) is pivotally attached to the rear end of the rear cover (21), and an elastic soil-proof cover (48) having flexibility is provided on the inner surface side of the rear cover (21).
And a portion of the rear cover (21) corresponding to the soil cover (48) is an opening (43), and a biasing mechanism (58) for applying tension to the soil cover (48) to the rear cover (21). A rotary tillage cover device provided with an upper and lower sides of the soil-proof cover (48) is fixed to a rear cover (21), and a biasing mechanism (58) is attached to an outer surface side of the rear cover (21). A tension member (52) that is supported and has one end connected to the upper and lower sides of the soil protection cover (48) and a tension spring (57) between the tension member (52) and the rear cover (21). A rotary tillage cover device characterized by being provided.