JPS638172Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a slide rotary tilling device attached to a three-point link type work implement mounting device of an agricultural tractor.

BACKGROUND OF THE INVENTION Sliding rotary tillers attached to the rear of agricultural tractors have been known for some time.

The present invention is to provide a three-point link type work equipment mounting device with a hitch frame body, and to attach a roller to the hitch frame body so that it becomes a slide rotary tillage device immediately when a general rotary tillage device is installed instead of a dedicated slide rotary tillage device. It is intended that parts of an ordinary rotary tiller can be attached through the rotary tiller.

In addition, in conventional slide support devices, the bending force due to the weight of the work machine and the vertical force are all received by one slide support, which causes a large amount of friction on the contact surface of the rollers and rails of the slide support. This force acted on the slide, preventing it from sliding smoothly and reducing the durability of the slide support.

In the present invention, two rails are provided at the top and bottom, and the rollers rotatably supported inside the rails are rotated in different directions, horizontally and vertically, so that bending force and vertical force are supported separately.

This solves the problems of the conventional system.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

Figure 1 is a side view of the hitch machine frame and rotary tilling device attached to the rear of an agricultural tractor, Figure 2 is a drawing of the slide rotary tilling device lifted by the lift arm, and Figure 3 is the hitch machine frame and rotary tilling device. FIG. 4 is a side sectional view of the rail and roller section; FIG. 5 is a front view showing the slide rotation rod 29; FIG. 6 is a side sectional view of the hitch machine frame; 7 is a front view of the hitch machine frame, FIG. 8 is a plan view of the hitch machine frame, and FIG. 9 is a front view showing the movement of the slide operation plate 34.
Fig. 10 is a front view showing the slide operation plate 34 and cam 33, Fig. 11 is an enlarged front view of the slide operation plate portion, Fig. 12 is a front view showing the operation part of the cam 33, and Fig. 13 is a side view. , FIG. 14 is a plan view as well.

Let me explain in detail step by step.

The rear wheels 21 and 21 are attached to the rear axle scale 18 fixed to the rear of the transmission case of the agricultural tractor.
from the rear surface of the rear axle scale 18.
A PTO shaft 20 is provided protrudingly. Power is transmitted from the PTO shaft 20 via the universal joint 17 to the bevel gear box 11 of the rotary tiller. The universal joint 17 can not only be rotated up and down, but also can transmit power to the bevel gear box 11 even if it is rotated left and right. Power is transmitted from the bevel gear box 11 through the shaft in the main beam, and from the tilling chain case 22,
The tilling claw shaft 13 rotates to rotate the tilling claws 13a. 12 is a tilling cover, and 14 is a rear cover.

A top link hinge 21 is provided on the upper part of a rear axle scale 18 of an agricultural tractor, and the top link 1 is pivotally connected to the top link hinge 21.

Further, a pivot point for the lower links 7, 7 is provided in the lower part of the rear axle case 18, and the lower links 7, 7 are pivotally connected. The rear ends of the lower links 7 are pivotally connected to a pin 40 of a lower link mast 6 that constitutes a hitch frame.

As shown in FIG. 6, FIG. 7, and FIG.
A lower rail 24, which is a rear-opening rail parallel to the lower rail 24, is fixed by left and right lower link masts 6. The hitch beam 10 of the rotary tiller is installed parallel to and inside the lower link masts 6, 6.
The fixed bodies 9 are configured to be slidable left and right. A U-shaped fixed body reinforcement material 3 is inserted between the fixed bodies 9 and 9.
9 is fixedly installed across the bridge, and a lower roller shaft 37, which is a horizontal shaft, is installed at the left and right ends of the fixed body reinforcement member 39.
L and 37R are provided to pivotally support the lower rollers 4L and 4R. The lower rollers 4L and 4R are configured to rotate vertically within the lower rail 24 and to be able to move laterally. Further, the upper roller shaft 15 of the upper roller 3 is vertically connected to the center part of the fixed body reinforcing member 39.
protrudes, and an upper roller 3 that rotates in the horizontal direction is pivotally supported at the tip. A rotary tiller is slidably supported by one upper roller 3 and two lower rollers 4L and 4R. Bevel gear box 1 of rotary tillage equipment
A gauge wheel adjusting mast 8 is pivotally connected to the gauge wheel adjusting mast 8, and is pivotally connected to a mast hinge 38 protruding from a fixed body reinforcement member 39 through a hole at the front end of the gauge wheel adjusting mast 8.

In addition, the hitch beams 10, 10 fixed to the main beam 50 protruding from the left and right side surfaces of the bevel gear box 11 are connected to the hitch beam fixing bodies 9, 9.
It is linked to

When the rollers 4L and 4R slide left and right, the fixed body reinforcing member 39 slides, and the entire rotary tilling device attached thereto slides left and right.

As shown in FIG. 3, parallel to the center view between the upper rail 23 and the lower rail 24, a rail 26 for raising and lowering the slide operation plate 34 is arranged and fixed, and the slide operation plate rails 26, 26 are arranged and fixed. A slide operation plate 34 is fitted in between so as to be vertically movable.
The slide operation plate 34 is moved up and down by a vertical link 2 pivotally connected to the middle of the top link 1.
It is. The tip of the vertically moving link 2 is pivotally supported by a pin suspended between pin support plates 32 and 32, as shown in FIG. When moving up and down, the up and down link 2 reversely moves up and down. Due to this downward and upward movement, the slide operation plate 34 also moves downward and upward within the slide operation plate rail 26.

As shown in FIG. 10, the slide operation plate 34 is provided with a space 34a inside thereof, and the rotating roller 28 of the automatic slide lever 29 is fitted into the space 34a.

Further, the rotary roller 28 is restricted so that it cannot move outside the space, and is also restricted by a cam 33 to whether it moves to the right or to the left.

The slide rotation rod 29 connects its upper end to the upper rail 2.
3, and a roller pin 27 at the center of a reinforcing plate 39 provided with lower rollers 4L and 4R is loosely fitted into an elongated hole 29a at the lower end. When the slide rotation rod 29 is forcibly rotated left and right around the pin 51, the roller pin 27 moves up and down in the long hole 29a, and the reinforcing plate 39 is moved left and right in the long hole 24a of the lower rail 24. Let it happen.

Due to the left and right movement of the slide operating rod, the reinforcing plate 39, as well as the lower rollers 4L and 4R, the upper roller 3,
In other words, the rotary tiller is slid from side to side.

The forced rotation force of this slide operating rod is obtained from the vertical force of the rotary tiller. That is, the cam 33
By rotating the position of the cam 33 left and right about the pivot pin 42, the rotating roller 28 of the slide rotating rod 29 is forcibly moved left and right along the cam 33. The cam 33 is pivotally supported at the lower end of the slide operation plate 34 by a pivot pin 42, and the link 31 is rotated as shown at 33' and 33'' in FIG. 11 by the rotation of the lever 5. roller 2
8 to the right or left. The lever 5 is fixed to the link 41, and the lever 5 is fixed to the link 41.
is pivotally supported by a pivot pin 42. Pivot pin 42
A long hole 41a is provided in the part so that it can be positioned to the right, left, or center after pulling the lever 5 and removing it from the guide groove 30a.

The lever 5, the link 41, and the support plate 30 of the link 31 also project from the slide operation plate and move up and down together.

By operating the lever 5, the pin 45 of the link 41
When the cam 33 is placed at the center of the guide groove 30a, the cam 33 is fixed at the center position and the cam 33 shown in FIG.
In FIG. 3, the rotating roller 28 is fitted into the central U-shaped groove 33a, and the slide rotating rod 29 remains vertical and does not rotate left or right. 35 and 36 are cams 33
This is the left and right stopper.

By operating the lever 5, the pin 45 of the link 41
When the cam 3 is inserted into the right groove of the guide groove 30a,
3 is tilted to the right and reaches the position 33" and the rotary roller 28 comes into contact with the left shoulder 33c of the cam 33 and is forcibly moved to the left, and the slide rotary rod 29
The leftward rotation of the roller pin 27 rotates the reinforcing member 39 to the left, and the upper roller 3 and the lower rollers 4L and 4R to the left.
When the cam 33 is rotated to the 3" position, the right shoulder 33b
The roller pin 27 is fixed to the center of the reinforcing member 39 and is inserted into the long hole 24a of the lower rail 24.
The protruding portion is loosely fitted into a long hole 29 a of the slide rotation rod 29 .

Reference numeral 25 denotes a pivot support for the top link, which is fixed to the upper surface of the upper rail 23.

In the configuration of the present invention, in the shape of the gap 34a of the slide operation plate 34, the upper shoulder 33 is attached to the cam 33.
Since 34c and 34d are configured similarly to a and 33b, when the slide operation plate 34 is lowered, that is, when the rotary tiller is raised, the rotating roller 2
8 is stably housed in the central elongated hole 34b, and as a result, the rotary tiller is arranged so that it always returns to the center when raised. This also serves as a safety device to prevent personal accidents.

As described above, the present invention has a three-point link type work equipment mounting device equipped with a hitch frame constituted by the upper rail 23, which is a rail that opens from the bottom, and the lower rail 24, which is a rail that opens from the rear, parallel to the upper rail 23. The fixed body 9 and the mast hinge 3 are attached to the rear of the hitch frame.
A mounting device consisting of 8 is arranged, and lower rollers 4L, 4R and upper roller 3 are placed forward from the mounting device.
The lower rollers 4L and 4R are loosely fitted to the lower rail 24, and the upper roller 3 is loosely fitted to the upper rail 23 so as to be slidable left and right, and the mast hinge 38
Since the gauge wheel adjustment mast 8 of the rotary tiller is connected to the rotary tiller, and the hitch beam 10 of the rotary tiller is connected to the fixed bodies 9, the following effects are achieved.

First, the rails and rollers allow for smooth sliding, compared to the conventional pipe sliding type.
Even if a sliding force is applied in a slightly twisted direction, it can be absorbed by the rollers and rails, and even if the sliding force is generated by a cam as in this example, rather than by a hydraulic cylinder or screw-type accurate sliding device, This allows for smooth sliding.

Second, as in the conventional technology described in Japanese Patent Application Laid-Open No. 55-102301, both the bending force due to the weight of the working machine and the vertical force are received by a support part made of rollers and rails at one location. In this case, a large force is applied to the contact surface between the roller and the rail, resulting in a large frictional force. However, in the case of the present invention, the bending force is applied by the horizontally rotating upper roller, and the vertically rotating Since the lower roller that rotates receives the force in the vertical direction, the load can be shared between both rollers and supported, and the force acts on the contact surfaces of the rollers in a direction perpendicular to their respective axes. Frictional force is applied in a direction that guarantees the durability of the shaft and roller, which prevents the roller bearing from being destroyed, improves durability, and allows smooth left and right sliding at the slide support. It can be done.

Thirdly, in the present invention, a hitch frame is attached to the three-point link type work equipment mounting device of the tractor, and the mounting device consisting of the fixed bodies 9 and the mast hinge 38 can be slid left and right on the hitch frame. The slide mechanism is configured by attaching the slide mechanism to the fixed body 9.
The hitch beam 10 of an ordinary rotary tiller can be attached to the mast hinge 38, and the gauge wheel adjustment mast 8 of an ordinary rotary tiller can be attached to the mast hinge 38 as is.

Therefore, the hitch frame body consisting of the upper rail 23 and the lower rail 24 includes the fixed bodies 9, 9 and the mast hinge 38.
By simply installing a mounting device consisting of the upper roller 3 and lower rollers 4L and 4R, a normal tractor and rotary tiller can be converted into a slide rotary tiller.

[Brief explanation of drawings]

Figure 1 is a side view of the hitch machine frame and rotary tilling device attached to the rear of an agricultural tractor, Figure 2 is a drawing of the slide rotary tilling device lifted by the lift arm, and Figure 3 is the hitch machine frame and rotary tilling device. FIG. 4 is a side sectional view of the rail and roller section; FIG. 5 is a front view showing the slide rotation rod 29; FIG. 6 is a side sectional view of the hitch machine frame; 7 is a front view of the hitch machine frame, FIG. 8 is a plan view of the hitch machine frame, and FIG. 9 is a front view showing the movement of the slide operation plate 34.
Fig. 10 is a front view showing the slide operation plate 34 and cam 33, Fig. 11 is an enlarged front view of the slide operation plate portion, Fig. 12 is a front view showing the operation part of the cam 33, and Fig. 13 is a side view. , FIG. 14 is a plan view as well. 3... Upper roller, 4R, 4L... Lower roller, 5... Lever, 9... Hitachi beam fixing body, 23... Upper rail, 24... Lower rail.

Claims (1)

[Scope of utility model registration request] A hitch frame body constituted by an upper rail 23 that is a downwardly opening rail and a lower rail 24 that is a rearwardly opening rail that is parallel to the upper rail 23 is attached to the three-point link type work equipment mounting device, and on the rear surface of the hitch frame body, A mounting device consisting of the fixed bodies 9, 9 and the mast hinge 38 is arranged, and the lower roller 4 is placed forward from the mounting device.
L and 4R and the upper roller 3 are protruded, the lower rollers 4L and 4R are loosely fitted to the lower rail 24, and the upper roller 3 is loosely fitted to the upper rail 23 so as to be able to slide left and right, and the gauge wheel adjustment mast of the rotary tilling device is attached to the mast hinge 38. 8 is connected, and the hitch beam 10 of the rotary tillage device is connected to the fixed bodies 9 and 9.
A slide rotary tilling device characterized by connecting two.