JPS5939847Y2 - Tillage leveling device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tillage leveling device, which regulates the vertical movement range of a leveling cover provided at the rear of the tillage section and biased in the ground contact direction, and also controls the maintenance and maintenance of the tillage section. The purpose is to make it possible to easily lift the leveling cover to a large extent when necessary and sufficient for inspection.

Work has been widely carried out to evenly level tilled and crushed soil by installing a bendable leveling cover on a fixed tilling cover by biasing it in the ground contact direction at the rear of the tilling section.

Conventionally, as means for biasing the leveling cover in the ground contact direction, a connecting rod is provided between the tiller frame and the leveling cover, and a coil spring wound around the connecting rod is used to bias the leveling cover in the ground contact direction. The elastic force of the coil spring is adjustable.

However, according to this conventional example, the connecting rod is freely movable in the axial direction with respect to the machine frame, and in particular, the amount of movement of the leveling cover in the upward direction cannot be restricted, and the restriction is limited to the amount of compression of the spring. There is a strong and weak effect on the ground pressure.

In addition, when performing maintenance and management of the tiller, such as replacing tiller claws or removing grass, it is difficult to lift the leveling cover. The connecting rod is removed and the leveling cover is lifted, but the former method involves the risk of the tilling device falling by itself.
The work is also difficult.

Furthermore, the latter means requires extremely troublesome work to attach and detach the connecting rod.

In view of the above-mentioned circumstances, the present invention is designed to make it possible to bias the leveling cover in the direction of contact with the ground and to restrict the operating range in the vertical direction, even though the connecting rod and the coil spring surrounding it are eliminated. For this purpose, in a device that is provided with a leveling cover that is biased in the ground contact direction at the rear of the tilling section, the leveling cover is connected to the fixed tillage cover so that it can be bent up and down, and the bending fulcrum is used as the center. A pair of left and right regulating bodies each having a guide portion that is movable and fixed in the vertical direction is attached to the outside of both sides of the fixed tillage cover, respectively, and an engaging body attached to the leveling cover is attached to each of the guide portions so as to be slidable in the vertical direction. A tillage leveler characterized in that a pair of left and right bullets are engaged with each other and are hung between the engaging body and the fixed tillage cover side and near the bending fulcrum for urging the leveling cover in the ground contact direction. They succeeded in developing the device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing the overall configuration, reference numeral 1 denotes a mission case of a tractor 2, which serves as a vehicle body.The upper surface of this case 2 is equipped with a hydraulic work equipment lifting device 3, and the lifting device 3 has a pair of left and right lift arms 4. have

Reference numeral 5 denotes a tilling leveling device, which is connected to the rear of the tractor 1 by a three-point link connecting device 6 in this embodiment, and can be raised and lowered by connecting each lift arm 4 and each lower link halfway with a lift rod 7. .

To the tillage leveling device 5, the power from the tractor PTO shaft 8 can be transmitted via a transmission shaft 10 having a universal joint 9 at both ends, and the tractor side of the transmission system is illustrated in FIG. .

In FIG. 4, an extension shaft 11 is connected to the PTO shaft 8, and a constriction 12 is likely to be formed in the middle of the extension shaft 11.

Spline fit the flange joint 13 on the PTO shaft 8, fit the flange joint 14 of the universal joint 9 on the extension shaft 11,
The flange joints 13 and 14 are fitted with a spigot and are connected to each other with a sharpie 15.

Note that 12a indicates a retaining pin, which engages with the constricted portion 12. Therefore, according to the transmission system shown in FIG. 4, if an excessive load is applied during work, the shear pin 15 will be cut and the safety pin However, since the flange joint 14 is fitted onto the extension shaft 11, it becomes convenient when reattaching the shear pin 15.

In FIGS. 1 to 3, the tilling section 16 of the tilling and leveling device 5, which is driven by a transmission shaft 10, has a number of removably installed tilling claws on a tilling claw shaft that rotates around a horizontal horizontal axis. In this embodiment, a side drive type device having a transmission case 17 on the side is illustrated.

18 is a fixed tillage cover, and a first cover covers the upper part of the tillage section 16.
A cover 19 and a second cover 2 that covers both sides of the tilling section 16
Derived from 0.

Reference numeral 21 denotes a flat cover, the front part of which is connected to the first cover 19 by a bending fitting 22 so as to be bendable in the vertical direction.The bending fitting 22 has a hook portion 23, and the flat cover 21 connecting pins or shafts 24 are engaged, and the bending fittings 22 can be attached and detached with bolts 25.

Reference numeral 26 denotes a regulating body, which has a curved shape in the embodiment and has a shape similar to that of the second cover 2.
A pair of bending fittings 22 are provided on each outside of the bending fittings 22.

The regulating body 26 is provided with a guide part 27 centered on the shaft 24 and a mounting part 28, and the mounting part 28 has three bulges 28a, 2 in the figure spaced apart in the longitudinal direction.
8b and 28c are formed in stages.

Reference numeral 29 is attached with a bolt, and a distance collar 30 or the like is fitted onto the bolt, and the collar 30 is attached to the bulges 28a to 28.
In the figure, the wing nut 31 is connected to the bolt 29 when
A regulating body 26 is provided on the outside of the second cover 20 so as to be movable and fixed in the vertical direction.

Reference numeral 32 denotes an engaging body that protrudes from the side end of the leveling cover 21 and is engaged with the guide portion 27 of the regulating body 26. In the figure, since the guide portion 27 is a long hole, the engaging body 32 is It passes through the guide portion 27.

Note that the guide portion 27 may be a long groove.

33 is a bullet, one end of which is locked to the engaging body 32, and the other end is locked to a pin or shaft 34 provided on the second cover 20 near the bending fitting 22, so that the flat cover 21
is biased in the direction of ground contact.

In addition, in FIG. 1, a ruler wheel is provided on the left and right lower links, but this ruler wheel may be a sled body.

Alternatively, it may be a skid type ruler device in which a sled body is provided at the lower part of the transmission case 17 and the side frame.

In the above configuration, by driving the tractor 1 and transmitting rotational power to the tilling section 16 of the tilling and leveling device 5, the tilling operation of the field can be performed at a predetermined working depth.

The tilled soil is crushed by the rotation of the tilling section 16 and thrown backwards, but there is a leveling cover 21 behind the tilling section 16.
is urged in the direction of ground contact by a pair of left and right bombs 33, so the tilled soil accumulated in the front part of the leveling cover 21 is leveled at the curved part 21a of the cover 21 as the work progresses. It is.

During this work, depending on the amount of tilled soil, the leveling cover 21 is moved upward about the shaft 24 of the bending fitting 22 as shown by the chain line in FIG. The projectile 33 remains biased in the direction of contact with the ground, and the base of the projectile 33 is refracted.
2, and the other end is hung on the engaging body 32, so even if the leveling cover 21 follows the amount of soil or an uneven surface, the leveling pressure will not change by much. Therefore, it will be subjected to a uniform leveling effect.

In addition, when changing the installation angle of the leveling cover 21 depending on the working depth, loosen the nut 31 and bulge parts 28a~
It can be changed by reattaching it to 28c, and the vertical position of the leveling cover 21 during operation is regulated by the engaging body 32 coming into contact with the top and bottom of the guide part 27.

In addition, when performing maintenance and inspection of the tilling section 16, the nut 31 is loosened and the regulating body 26 is lifted and moved within the mounting section 28, and the leveling cover 21 is moved around the guide section 2 with the bending point as a fulcrum.
7, the leveling cover 21 can be lifted considerably higher and the rear of the tilling section 16 can be opened wide, which is extremely convenient for maintenance and inspection.

The present invention is as described above, and the structure can be simplified compared to the conventional method in which the cultivator frame and the leveling cover are connected by a connecting rod, and a coil spring is wound around the rod. Not only that, but the exterior appearance can be made neater, and it also has the advantage of achieving a uniform leveling effect and facilitating maintenance and inspection, so it is of great practical benefit.

That is, the leveling cover is refractably connected to the fixed tillage cover, and the engaging bodies attached thereto are slidably engaged in the vertical direction with the guide parts of the regulating bodies attached to the left and right outer sides of the fixed tillage cover. Since the guide part is centered on the bending fulcrum, the leveling cover can be bent smoothly in the vertical direction without being twisted. Since the above-mentioned engaging body and the vicinity of the refraction fulcrum on the side of the fixed tillage cover are each hung between them, the ground biasing force of the leveling cover is substantially constant regardless of the vertical position of the cover. In addition, leveling can be carried out without being affected by the amount of soil.

In addition, the pair of left and right regulators can be moved and fixed to the fixed tillage cover in the vertical direction, allowing the vertical position of the leveling cover to be adjusted. Because of the structure, the adjustment work can be easily carried out, and in the case of an elastic support mechanism using a connecting rod and a spring wound around the connecting rod at the middle of the tilling cover in the width direction, the rotation of the leveling cover can be easily performed. However, unlike the ballistic mechanism, it is difficult to perform maintenance smoothly with this invention, because there is no inclusion like the ballistic mechanism, so even when maintaining the claw by lifting the leveling cover a large amount, the same The cover can be rotated smoothly.

[Brief explanation of the drawing]

The figure shows an example of the present invention, and Figure 1 is a side view of the overall configuration;
Figure 2 is an enlarged side view of the main parts and also shows the operating status.
3 is a front view of FIG. 2, and FIG. 4 is an enlarged sectional view showing the conduction shaft system of FIG. 1. 5...Tillage leveling device, 16...Tillage section, 18...Fixed tillage cover, 21...
Leveling cover, 22... Refraction fitting, 26...
... Regulatory body, 27 ... Guide section, 28 ...
・・Installation is done with part 29・・・・・Installation is done with bolt 32・
... Engagement body, 33... Bombshell.

Claims (1)

[Scope of Claim for Utility Model Registration] A leveling cover is connected to a fixed tillage cover that covers the tilling area so as to be bendable up and down, and is provided with a bullet that urges the leveling cover in the direction of contact with the ground. A regulating body having a lower part of a guide centered on is attached to the left and right outer sides of the fixed tillage cover so as to be movable in the vertical direction, and an engaging body attached to the leveling cover engages with the guide part so as to be slidable in the vertical direction. and a pair of left and right bullets for biasing the leveling cover in the ground contact direction are hung between each of the engaging bodies and the vicinity of the bending fulcrum on the outside of the fixed tillage cover. Leveling device.