JPH0347002A - Rotary tiller cover support device - Google Patents

Abstract

PURPOSE:To reduce number of parts and to prevent contact between a rear cover and a tilling pawl by equipping a rod supporting arm to hold a rod upper part of a downward springing device to spring the rear cover in an integrated way with a cover suspending member fixed to the top side of a main cover. CONSTITUTION:A rear cover 15 to cover the rear of a tilling part 11 is rockingly supported at rear part of a main cover 14 to cover the top of a tilling part 11. The main cover 14 is supported at the side of a rotary machine frame 8 through a cover suspending member 24 fixed to the top side of the main cover 14. Further a downward springing device 37 to spring the rear cover 15 downward is equipped. A rod supporting arm 33 to hold the top of a rod 32 of the downward springing device 37 is set in an integrated way with the cover suspending member 24. Consequently, number of parts can be reduced. Therefore, manhour of assembly can be reduced and labor of assembling operation lessened. An angle between the main cover and the rear cover is not changed carelessly and contact between the rear cover and the tilling pawl of the tilling part can be effectively prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cover support device for a rotary tiller.

(Prior Art) Conventionally, as a cover for a rotary tiller, there is a main cover that covers the upper part of the tilling section, and a main cover that is supported at the rear end of the main cover so as to be swingable around a horizontal axis so as to cover the rear of the tilling section. The main cover has both ends fixed to the transmission case and side frame that make up the rotary machine frame, and the middle part in the left and right direction has a cover hanging structure fixed to the top surface of the main cover. It is fixed to the mounting brackets fixed to the left and right support arms, and the main cover is supported here.

The rear cover is equipped with a bullet lowering device for pressurization adjustment, the lower end of the rod of the bullet lowering device is pivoted to the upper surface side of the rear cover, the upper part of the rod is pivotally supported to the rear end of the rod support arm, The front ends of the rod support arms were bolted to mounting brackets fixed to the left and right support arms. Then, the rear cover was elastically lowered under appropriate elastic force by the elastic force of a coil spring fitted into the rod.

(Problem to be solved by the invention) However, in the cover support system of the above structure,
It is necessary to assemble the cover hanging concrete and the rod support arm to the support arm, which requires a lot of assembly time, and the angle between the main cover and the rear cover changes due to loosening of the connection between the rod support arm and the support arm. , there was a risk that the rear cover would come into contact with the tiller claws and cause damage.

In view of the above problems, the present invention aims to provide a cover support device for a rotary tiller that reduces the number of parts, reduces the number of assembly steps, and prevents contact between the rear cover and the tiller claws. do.

(Means for solving the problem) The technical means is the main cover 1 that covers the top of the tilling section 11.
A rear cover 15 that covers the rear of the tilling section 11 is provided at the rear end of 4.
The main cover 14 is supported to be swingable, and the main cover 14 is supported on the side of the rotary machine frame 8 via a cover hanging member 24 fixed to the upper surface of the main cover 14, and a lowering device 37 for lowering the rear cover 15 is supported. In the cover support device for the rotary tiller 1, a rod support arm 33 supporting the upper part of the loft 32 of the lowering device 37 is integrally provided with the cover hanging member 24.

(Function) According to the present invention, since the rod support arm 33 is integrally provided with the cover hanging member 24, the number of parts is reduced. Further, by simply fixing the cover hanging member 24 to the main cover 14, the rod support arm 33 can be arranged in a predetermined position, reducing the number of assembly steps. Further, since the rod support arm 33 is integrally provided with the cover hanging member 24 fixed to the main cover 14, the relative positions of the main cover 14 and the rear cover 15 do not change inadvertently.

(Embodiment) Hereinafter, embodiments of the present invention will be described based on the drawings. In Figs. 1 to 3, ■ is a side drive type rotary tiller, which is connected to the rear of the tractor via a three-point link means 2. be done. This rotary tiller 1 has a pair of support arms 5 fixed to the left and right sides of a gear case 4 having an input shaft 3, a transmission case 6 and a side frame 7 are respectively fixed to the outer ends of the left and right support arms 5, and a rotary tiller frame 8 is constructed. A pawl shaft 9 is rotatably supported by the transmission case 6 and the side frame 7, and a tilling portion 11 is formed by attaching a large number of tilling pawls 10 to the pawl shaft 9.

Reference numeral 13 denotes a rotary cover, which includes a main cover 14 that covers the upper part of the tilling section 11, a rear cover 15 that covers the rear of the tilling section 11, a leveling cover 16 that is pivotally supported at the rear lower end of the rear cover 15, and a side cover 14 that covers the upper part of the tilling section 11. A pair of left and right front covers 18 and a rear cover 19 are provided.

The main cover 14 has mounting portions 21 provided on both left and right ends thereof, and bolts 23 are fastened to mounting brackets 22 provided on the transmission case 6 and the side frame 7, respectively. A pair of cover hanging members 24 are fixed at appropriate intervals by welding or the like, and the cover hanging members 24 and a mounting bracket 25 fixed to the support arm 5 by welding or the like are connected to each other by bolts 27 via the buffer rubber 2G. It has been concluded. In addition, a plurality of bolt insertion holes 28 and 29 are formed in the mounting bracket 22 and the cover hanging member 24 at predetermined intervals in the vertical direction, so that the main cover 14 can be attached to the machine frame 8 by adjusting the height up and down. It is possible to change to

The front end of the rear cover 15 is pivotally connected to the rear end of the main cover 14 so as to be movable about the horizontal axis. Rear cover 1
A pair of left and right mounting portions 31 are provided on the upper surface of the 5. The lower end of a rod 32 is pivotally connected to the mounting portions 31, and the upper portion of the rod 32 integrally projects rearward from the cover hanging member 24. The rod 32 is supported by a support pin 34 supported by a rod support arm 33 so as to be movable up and down, and a coil spring 35.degree.

By appropriately adjusting the elastic force of each coil spring 35, 36, the rear cover 15 is elastically lowered under an appropriate elastic force. Also, with this adjustment, the main cover 14 and the rear cover 1
The angle with respect to 5 is also regulated as appropriate.

A connecting member 40 made of a square pipe material is installed between the rear inner surfaces of the double-strength bar hanging member 24, and a cultivator 41 can be attached to the connecting member 40. That is, the soil cultivator mounting bracket 4
2 is provided with a mounting part 43 at the front end that is removably fitted into the connecting member 40 from above, and is made detachable by a set pin 44 that fits the mounting part 43 and the connecting member 40 in the front-rear direction.

Further, a mounting tube 46 is fixed to the rear end of the mounting bracket 42, into which a support column 45 of the soil cultivator 4 is vertically adjustable. 47 is a cent bolt to which the support column 45 is fixed.

The embodiment of the present invention is constructed as described above, and has a structure in which the cover hanging member 24 to which the main cover 14 is attached and the rod support arm 33 that supports the rod 32 of the bullet lowering device 37 are provided integrally. , the number of parts can be reduced, and therefore the number of assembly steps can be reduced, the labor of assembly work can be saved, and costs can be reduced. In addition, since the cover hanging member 24 and the rod support arm 33 are integrally provided, there is no change in the angle between the main cover 14 and the rear cover 15 due to loosening of the fastening parts, unlike in the conventional case. 10 can also be effectively prevented. Furthermore, even when the height of the main cover 14 is adjusted in the vertical direction, the lowering device 37
Since the rear cover 15 is supported on the 4 side, the posture of the rear cover 15 does not change, so there is no change in the elastic force, and there is no need to adjust the elastic force. Furthermore, the rigidity of the main cover 14 can be improved by the connecting member 40, and by attaching the soil cultivator 41 to the connecting member 40, a rear two-wheel holder is not required, and the rotary cultivator 1 itself becomes compact.

Furthermore, the center of gravity is moved to the front, improving balance.

FIG. 4 shows another embodiment, in which the left and right cover hanging members 24
consists of a pair of left and right suspension plates 49 which are arranged opposite each other and have a width into which the mounting bracket 25 is fitted, and each suspension x Fi4
9 has a structure in which reinforcing ribs 50 are provided along the periphery on the outer surface side. 51 is an opening.

(Effects of the Invention) According to the present invention, the rear cover that covers the rear of the tilling section is swingably supported at the rear end of the main cover that covers the upper part of the tilling section, and is fixed to the upper surface side of the main cover. A cover support device for a rotary cultivator, in which a main cover is supported on a rotary machine frame side via a cover hanging member, and a lowering device for lowering a rear cover is provided, in which a rod supports an upper part of the rod of the lowering device. Since the support arm is integrally provided with the cover hanging member, the number of parts can be reduced, the number of assembly steps can be reduced, and the labor of assembly work can be saved.

Furthermore, the angle between the main cover and the rear cover does not change inadvertently, and contact between the rear cover and the tilling claws of the tilling section can be effectively prevented.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a sectional side view of essential parts showing an embodiment of the present invention, Fig. 2 is an overall side view, Fig. 3 is a schematic plan view of the same, and Fig. 4 shows another embodiment. FIG. ■...Rotary tiller, 8...Rotary machine frame, 11
... Cultivating part, I4... Main cover, 15... Rear cover, 24... Cover hanging concrete, 32... Rod, 3
3... Rod support arm, 37... Bullet lowering device. Patent applicant: Kubota Iron Works Co., Ltd.9

Claims (1)

[Claims] (1) A rear cover (1) that covers the rear of the tilling section (11) is attached to the rear end of the main cover (14) that covers the top of the tilling section (11).
5) is swingably supported, the main cover (14) is supported on the rotary machine frame (8) side via a cover hanging member (24) fixed on the upper surface side of the main cover (14), and the rear cover (14) is supported on the rotary machine frame (8) side. (
15) in a cover support device for a rotary cultivator (1) comprising a lowering device (37) for lowering a rod support arm (33) that supports the upper part of a rod (32) of the lowering device (37). A cover support device for a rotary tiller, characterized in that the cover suspension member (24) is provided integrally with the cover suspension member (24).