JPH083207Y2 - 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 having a rear cover whose position can be adjusted.

(Prior Art) Usually, in a rotary cultivator, a rotary machine frame is formed by a gear case, left and right support arms, a transmission case, a side frame, etc., and an upper cover and left and right side covers of a cover device are fixed to the rotary machine frame. ,
A rear cover is pivotally supported by the upper cover via a horizontal axis, and when the working depth is changed, a rear downward inclination angle of the rear cover is changed.

(Problems to be solved by the invention) When the tilt angle of the rear cover changes, the distance from the tilling part changes, which causes a change in the crushing performance, which may deteriorate the crushing performance when deep cultivating. is there.

Although not equipped with a rear cover, a technique for keeping the crushed soil performance constant even when the working depth changes is disclosed in Japanese Utility Model Publication No. 54-2332. In this technique, the upper cover is formed in an arc shape centering on the claw shaft and is rotatable about the claw shaft with respect to the rotary machine frame, and the height of the rear lower end of the upper cover is increased according to the working depth. The height is adjustable.

In this conventional technique, since the upper cover is not fixed to the rotary machine frame, it cannot be a reinforcing member for the rotary machine frame, and the front part of the upper cover is arranged at the rear when the shallow tillage is performed. Another problem is that debris is scattered from the area to the upper front.

According to the present invention, the upper cover is fixed to the rotary machine frame in the same manner as before, and a retractable cover is provided on the upper rear portion of the upper cover so that the front and rear positions can be adjusted, and the rear cover is pivotally supported on the retractable cover. An object of the present invention is to provide a cover device for a rotary cultivator configured such that the pivotal support portion of the rear cover can be adjusted in the front-rear position.

(Means for Solving the Problem) A specific means for solving the problem in the present invention is to fix the upper cover 13 to the rotary machine frame 7 and
In a cover device for a rotary cultivator having a rear cover 14 extending downward from the rear, a rear upper part of the upper cover 13 supports the upper part of the rear cover 14 so as to be swingable about a horizontal axis and is substantially supported by the upper cover 13. A retractable cover 24, whose position can be adjusted from the overlapping position to a position projecting rearward and downward from the rear edge of the upper cover 13, is arranged, and the position of the retractable cover 24 on the fixed side having the rotary machine frame 7 and the upper cover 13. A guide member 27 for guiding the adjustment is provided, and the position adjusting means 40 for the retractable cover is provided between the retractable cover 24 and the fixed side.
Is provided.

(Operation) When the position adjusting means 40 provided between the rotary machine frame 7 and the bracket 25 on the support 24 is actuated, the support (removal cover) 24 is fixed to the rear upper part of the upper cover 13 to the left and right. Guided by the pair of guide members 27, the position of the rear cover 14 is adjusted steplessly to the lower rear (or the upper front), and the height of the rear cover 14 is set to a favorable height for shallow plowing (or deep plowing). Even if the height of the rear lower end of the rear cover 14 is changed, the position of the rear cover 14 does not change much in the front-rear direction, and the extreme deterioration of the soil crushing performance is avoided. Rear cover
When 14 is moved rearward and downward, a gap is created between the upper cover 13 and the rear end thereof, but the support 24 closes the gap and the support 24 itself serves as a cover.

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

1 to 4, reference numeral 1 denotes a rotary cultivator mounted on a rear portion of a tractor so as to be able to move up and down via a three-point link mechanism and a hydraulic device. In this rotary cultivator 1, a pair of left and right support arms 4 are fixed to a gear case 3 having an input shaft 2, and a transmission case 5 and a side frame 6 are fixed to the outer ends of the left and right support arms 4 to form a rotary machine frame 7. Then, the pawl shaft 8 is supported between the transmission case 5 and the lower portion of the side frame 6 so as to be rotatable around the horizontal shaft, and the pawl shaft 8 is provided with a large number of plowing pawls 9
Is provided to form the tilling part 10.

Reference numeral 12 is a cover device for covering the cultivating part 10, and has an upper cover 13, a rear cover 14, a front cover 15, and a pair of left and right front and rear covers 16 and 17.

The upper cover 13 is an arc-shaped metal plate that is substantially along the upper part of the tillage part 10, and side plates 19 on the left and right sides thereof are fixed to the transmission case 5 and the side frame 6 of the machine frame 7, and the front and rear covers 16, 1
7, the left side is fixed to the transmission case 5 and the upper cover 13, and the right side is fixed to the side frame 6 and the upper cover 13, respectively, and the upper end of the front cover 15 extending forward and downward is fixed to the front part of the upper cover 13. The front cover 15 is formed of an elastic plate such as rubber, and the bar member 20 provided on the front portion can be engaged with the working engagement portion 21 and the winding engagement portion 22 of the front cover 16. ing.

The rear portion of the upper cover 13 has an inclined portion 13a that is inclined rearward and downward, and the support 24 is mounted on the inclined portion 13a. The support 24 has a length that extends over substantially the entire width of the upper cover 13, has a triangular cross-sectional shape, and has an upper surface that is substantially horizontal. A pair of left and right brackets 25 is fixed to the upper surface so as to project rearward and upward. In addition, sliding bodies 26 are fixed to the left and right ends. The sliding body 26 is made of channel steel or the like.

On the other hand, guide members 27 are fixed to the inner surfaces of the left and right side plates 19 at the left and right side portions of the upper rear portion of the upper cover 13. This guide member is formed of a grooved steel or the like having a large groove into which the sliding body 26 can be inserted, forms a guide rail that supports and guides the sliding body 26, is inclined rearward and downward, and is located behind the upper cover 13. It projects rearward from the edge. Therefore, the position of the support 24 can be adjusted to the rear lower side or the front upper side by the guide member 27, and from the position where the support 24 is substantially overlapped with the rear upper portion of the upper cover 13 shown by the solid line in FIG. It is possible to advance to a position that projects rearward and downward from the rear edge of 13.

A hinge member 28 is provided on the back surface of the support 24, and a front upper part of the rear cover 14 is connected via a horizontal shaft 29 so as to be swingable about the horizontal shaft. A pair of left and right mounting brackets 30 are provided on the back surface of the rear cover 14, and the left and right mounting brackets 30 and the left and right brackets on the support 24 are provided.
An equalizing pressure adjusting means 31 is provided between each of them.

The leveling pressure adjusting means 31 is a pin 33 pivotally supported by the bracket 25.
The rod 34 is swingably inserted into the rod, and the springs 35 and 36 are fitted above and below the rod 34 with the pin 33 in between.
5 is retained by a pin 37, and the lower spring 36 is retained by a spring pressure adjusting means 38 capable of adjusting the position in the rod longitudinal direction.

A position adjusting means 40 for the support 24 is provided between the bracket 25 and the support arm 4. The position adjusting means 40 includes an outer cylinder 42 supported by a support portion 39 provided on the support arm 4 via a pin 41 and an inner cylinder 44 whose tip is pivotally connected to the bracket 25 via the pin 43. A screw rod 45 is inserted into the female screw formed in the inner cylinder 44, and the screw rod 45 is screwed with the handle 46. Position adjustment, that is, the upper part of the rear cover 14 is adjusted to the lower rear or the upper front. The outer cylinder 42 may be attached to the gear case 3 or the upper cover 13, and the position adjusting means 40 may be provided as a left and right pair.

The lower surface of the support 24 is parallel to the inclined portion 13a of the upper cover 13, and when the support 24 is moved rearward and downward, the lower surface is desired by the tiller 10, and the upper cover 13 and the rear cover are provided.
It becomes a cover that closes those gaps with 14.

The position adjusting means 40 can adjust the position of the support 24 and the rear cover 14 steplessly, and the support 24 is held at the adjustment position. However, the locking means 68 is provided to more firmly fix the support 24 to the upper cover 13 at the most frequently used uppermost position and lowermost position or an intermediate position thereof. By using this locking means 68, the position adjustment of the support 24 becomes a step.

In the locking means 68, a hook-shaped pin 70 is fixed to a plate member 69, the plate member 69 is attached to the rear cover 17 by a wing bolt 71, and the pin 70 penetrates the rear cover 14 and the guide member 27 so that the sliding member 26 of It is engageable with the hole. The pin cover holes of the rear cover 17 and the guide member 27 or the pin holes of the sliding body 26 are formed at a plurality of front and rear positions.

FIG. 5 shows a modified example of the locking means 68, in which the pin 70 penetrates the cylindrical body 72 fixed to the outer surface of the rear cover 17,
The spring 73 is elastically pressed toward the sliding body 26, and the sliding body 26 is formed with a plurality of holes 70 for the pins 70. Pin 70
When pulled out against the spring 73, the stopper can be engaged with a stopper 75 fixed to the tubular body 72.

In FIGS. 1 and 3, reference numeral 77 indicates an automatic plowing depth adjusting means, which is not shown in detail, but is provided on the support 24 and detects the inclination angle of the rear cover 14 to detect the tractor. The hydraulic device is operated to move the rotary cultivator 1 up and down, and the plowing depth is always kept constant even if the field has irregularities.
When the means 77 is operated, the leveling pressure adjusting means 31 is set in the inoperative state, and the rear cover 14 is in the free swinging state.

6 and 7 show in detail the spring pressure adjusting means 38 of the equalizing pressure adjusting means 31, in which the rods 34 are formed with cutouts 48 at regular intervals and receive the lower end of the lower spring 36. 49 is mated. An engaging member 51 is supported on the receiving member 49 via a pin 50, and is biased in the direction of arrow 53 by a coil spring 52 also fitted to the pin 50. The engaging member 51 is formed with an engaging projection 54 and a handle portion 55 which can be engaged with and disengaged from the notch 48, and when the engaging projection 54 engages with the notch 48, the receiving member 49 becomes a lower spring. The urging force of 36 is carried and the urging force is transmitted to the rod 34.
The engaging member 51 can be easily rotated by slightly raising the receiving member 49 against the lower spring 36, and the receiving member 49 is made to correspond to the required notch 48, and the engaging protrusion 54 is engaged with the notch 48. The biasing force of the upper and lower springs 35, 36 can be adjusted simply by combining them.

The rear cover 14 shown in FIGS. 1 and 2 can also be used when the rear gauge wheel and the cultivator are mounted on the rotary machine frame. A notch 57 that avoids interference is formed, and a notch 58 that avoids interference with the cultivator is formed in the lower center part.If the rear gauge wheel and cultivator are not used, both notches 57 and 58 are auxiliary covers. It has been closed by 59,60.

The auxiliary cover 59 has a trapezoidal shape, and a pin portion 61 protruding to one side of the lower portion thereof is fitted into the tubular portion 62 of the rear cover 14, and an upper portion thereof is attached via a fixture 63.

As shown in FIGS. 8 and 9, the attachment 63 has a rear cover 14
64, a nut member 65 with a handle that is screwed into the screw 64, the nut member 65 and an auxiliary cover
59 and a spring plate 66 arranged between them. The spring plate 66 is a strip plate and has an original shape of an arc, and when pressed by the nut member 65, the auxiliary cover 59 is pressed against the rear cover 14 at two points separated by a distance. Therefore, the auxiliary cover 59 is elastically attached to the rear cover 14 at two points, and the installation interval is substantially the same as the conventional technique of fastening with a plurality of bolts, but the installation work is extremely difficult. This has the effect of facilitating the shock of the debris and reducing the deformation of the auxiliary cover 59.

The spring plate 66 abuts on the flange portion 59a formed on the upper edge of the auxiliary cover 59 or the flange portion 14a on the side edge of the rear cover 14 to prevent rotation.

(Effects of the Invention) According to the present invention described in detail above, the upper portion of the rear cover 14 is swingably supported around the horizontal axis on the rear upper portion of the upper cover 13, and is substantially overlapped with the upper cover 13 from the upper cover. A guide member for arranging a retractable cover 24 whose position can be adjusted to a position projecting rearward and downward from the rear edge of 13 and for guiding the position adjustment of the retractable cover 24 to the fixed side having the rotary machine frame 7 and the upper cover 13. 27 is provided, and the position adjusting means 40 for the leaving / closing cover is provided between the moving / closing cover 24 and the fixed side.
Is fixed to the rotary machine frame 7 and the debris scattering prevention above and in front of the tiller 10 is ensured, the upper part of the retractable cover 24 and the rear cover 14 is moved backward by the operation of the position adjusting means 40. The position can be adjusted downward or upward, and the height can be adjusted without significantly changing the inclination angle of the rear cover 14, that is, without significantly changing the distance between the cultivating part 10 and shallow cultivating. Also, it is possible to prevent deterioration of the crushed soil performance at the time of deep plowing, and even when the rear cover 14 is separated from the upper cover 13 rearward and downward, a cover for retracting between both covers is provided.
Can be covered with 24.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a sectional side view, FIG. 2 is an exploded rear view, FIG. 3 is a side view of a main part, and FIG. IV-IV line sectional view, FIG. 5 is a sectional view showing a modified example of the locking means, FIG. 6 is an enlarged side view of the spring pressure adjusting means, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 2, and FIG. 9 is a sectional view taken along line IX-IX in FIG. 1 …… Rotary tiller, 7 …… Rotary machine frame, 10 …… Tiller, 12 …… Cover device, 13 …… Top cover, 13a ……
Inclined part, 14 ... Rear cover, 24 ... Support, 25 ... Bracket, 26 ... Sliding body, 27 ... Guide member, 40 ... Position adjusting means.

Continuation of the front page (56) Reference JP-A-62-138102 (JP, A) Actually open 1-180003 (JP, U) Actually open 53-103812 (JP, U) Actually public 61-38404 (JP , Y2)

Claims (1)

[Scope of utility model registration request] 1. A cover device for a rotary cultivator in which an upper cover (13) is fixed to a rotary machine frame (7) and a rear cover (14) is extended downward from a rear portion of the upper cover (13), The upper part of the rear cover (14) is swingably supported around the horizontal axis and is supported by the upper part of the upper cover (13).
A retractable cover (24) whose position can be adjusted from a position where the upper cover (13) is substantially overlapped with the upper cover (13) to a position projecting rearward and downward from the rear edge
And a guide member (27) for guiding the position adjustment of the withdrawal cover (24) is provided on the fixed side having the rotary machine frame (7) and the upper cover (13). A cover device for a rotary cultivator, which is provided with a retractable cover position adjusting means (40) between the fixed side and the fixed side.