JPH035203Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention pivots and connects a lift arm for hanging a working device to a traveling machine body so as to be able to swing vertically.
The present invention relates to a tractor working device elevating structure in which a fluid pressure cylinder is interlockedly connected to the lift arm on the outer surface side of the traveling body.

By installing a fluid pressure cylinder outside the machine, the above can be replaced with a cylinder with a different stroke depending on the work conditions, or a cylinder with a different capacity depending on the type of attached work equipment, etc. This allows easy assembly of cylinders suitable for each work condition.

Through simple improvements, the present invention improves workability by allowing work to follow the ground to be carried out well regardless of pitching of the traveling aircraft, without impairing the above-mentioned advantages in terms of assembly. The purpose is to enable improvement.

In order to achieve the above-mentioned object, the present invention, in the above-mentioned tractor working device elevating structure, includes a lift member that swings and raises the lift arm by abutment, and is attached to the machine body so as to be vertically displaceable. It is characterized in that the member and the fluid pressure cylinder are connected.

In other words, by installing a hydraulic cylinder outside the fuselage, it is possible to easily replace the cylinder with a cylinder with a different stroke or a cylinder with a different capacity.
By simply improving the lift member by driving it up with a cylinder and raising it by abutting the lift arm, for example, it is possible to attach a ground support member such as a ground tail wheel to the working device, and to improve the pitching of the traveling aircraft. Regardless, the work equipment follows the ground and touches the ground, and when turning at the edge of the field, the lift member is driven upward, and the lift member contacts the lift arm to levitate the work equipment above the ground. I was able to perform the taing work better.

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

An engine 3 is mounted on the front part of a running vehicle body equipped with front and rear wheels 1 and 2, and the running vehicle body is equipped with a handle 4 and a driver's seat 5 to constitute a tractor. A rotary tilling device 9 as an example of a working device is interlocked via a three-point linkage device 8 consisting of a link 6 and a pair of left and right lower links 7, 7, and a pair of left and right lift arms are attached to be able to swing vertically. 10,10
and the lower links 7, 7 through rods 11, and the lift arms 10, 10.
A double-acting type fluid pressure cylinder 12 is interlocked to constitute a riding type cultivator.

To operatively connect the cylinder 12 and the lift arm 10, a lift member 14 is pivotally connected to the pivot shaft 13 of the lift arm 10, and the lift member 14 is connected to the rear part of the vehicle body. The cylinder 12 is connected to the bracket 15, and the lift arm 10
A contact member 16 for contacting the lift member 14 from below is provided in series, and the lift arm 10 is driven and swung upward by contact with the cylinder 12 as it is extended.

With the above configuration, as shown in FIG.
By installing the above-mentioned cylinder 12 and shortening the cylinder 12 to separate the lift member 14 from the contact member 16, the tilling work can be carried out in a floating state in which the tilling device 9 follows the ground, regardless of pitching of the traveling vehicle body. While doing so, when turning at the edge of the field, the cylinder 12 is extended to allow the tilling device 9 to float above the ground.

Mounting bracket 15 for the lower links 7, 7
A stopper 19 is provided at the base end of the attachment side of the lower links 7, 7 for abutting and preventing the lower links from swinging upward more than the set value, and during the floating work mentioned above,
The lift arms 10, 10 are configured to prevent the lift arms 10, 10 from unexpectedly swinging up significantly and colliding with the fenders 20, 20 of the rear wheels 2, 2, thereby preventing damage to the fenders 20, 20. This stopper 19 may be provided so as to come into direct contact with the lift arm 10.

To connect the cylinder 12 to the mounting bracket 15, the opposing pieces 15a, 1 of the mounting bracket 15
A convex mounting hole 21 is formed in each of 5a, and as shown in FIGS. 2 and 3, the collar members 23, 23 are track-shaped and have pin insertion holes 22, 22 at both ends; The cylinder 12 is attached via a pin 24, and by changing the posture of the collar member 23, the lower end side connection position of the cylinder 12 can be changed from the high position _A1 shown in FIG. 2 to the lower front and rear positions A1, respectively. It is configured so that it can be changed in three locations: ₂ , A, _{and 3} .

FIG. 4 shows another embodiment, in which the pin 25 connecting the upper end of the cylinder 12 is configured to be long, and the tip of the pin 25 is used to make contact with the lift arm 10. .

FIG. 5 shows another embodiment, in which a mower 26 is attached to the lower abdomen of the machine body between the front and rear wheels 1 and 2, as shown by the two-dot chain line in FIG. That is, the mower 26 is connected via a four-link mechanism including a front link 27 and a pair of rear links 28, 28,
In addition, the lift arm 29, which is attached to the aircraft body so as to be able to swing up and down, and the rear links 28, 28 are connected to the rod 3.
0 and the lift arm 2
An angle-shaped lift member 31 that contacts the 9, 29 and swings it up is attached to the lift arms 29, 29.
A hydraulic cylinder 32 is attached to the lift member 31 so as to be able to swing freely around the coaxial center, and furthermore, a fluid pressure cylinder 32 is attached between the lift member 31 and the aircraft body.
Normally, the mower 26 is supported on the ground by the ground wheels 33, 33 for mowing work, and when turning, the mower 26 is floated above the ground by the extension of the cylinder 32.

This cylinder 32 is used by replacing the cylinder 12 for raising and lowering the tilling device 9, but a dedicated one may be used separately.

[Brief explanation of the drawing]

The drawings show an embodiment of the elevating structure for a tractor working device according to the present invention, in which Fig. 1 is an overall side view of a riding type cultivator, Fig. 2 is a partially cutaway side view of the main part, and Fig. 3 is a main part. FIG. 4 is a partially cutaway rear view of the main part showing another embodiment, and FIG. 5 is a partially cutaway side view of the main part showing another embodiment. 10,29...Lift arm, 12,32...
Cylinder, 14, 31...Lift member.

Claims (1)

[Scope of utility model registration request] Lift arm 1 for hanging work equipment on the traveling aircraft
0 and 29 are pivotally connected so as to be able to swing up and down,
A tractor working device elevating structure in which fluid pressure cylinders 12, 32 are interlocked and connected to the lift arms 10, 29 on the outer surface side of the traveling body,
Lift members 14 and 31, which swing and raise the lift arms 10 and 29 by abutment, are attached to the fuselage so as to be vertically displaceable, and the lift members 14 and
31 and the fluid pressure cylinders 12, 32 are connected to each other.