JPH06253641A - Riding lawn mower - Google Patents

Abstract

PURPOSE:To simplify the lift-driving structure of a mower in the riding lawn mover in which the mover is hung and mounted on the lower part of a travel frame through a link mechanism comprising a front link and a rear link, the travel frame being equipped with a lower link capable of being vertically moved with a lift arm at the rear part of the frame. CONSTITUTION:A rear link 8 is connected to a lower link 12 through a lifting rod 14 to enable the vertical driving of a mower 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower mounted on a lower portion of a traveling body having a lower link which is vertically swung by a lift arm at a rear portion of the body via a link mechanism including a front link and a rear link. The present invention relates to a riding lawn mower that is attached by hanging.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned riding lawn mower, when actually driving the mower up and down, the actual flat blade 3-6750 is used.
As disclosed in Japanese Patent Publication No. 6, an elbow type swing link in which a rear link of a mower suspension link mechanism and a hydraulic cylinder provided at a swing fulcrum of a lower link are vertically swung by the hydraulic cylinder; The other end of the swing link is connected via an elevating link mechanism including a vertical link connecting to the rear link to drive the rear link up and down.

[0003]

According to the above structure, since the hydraulic cylinder for lifting the rear link and the lifting link mechanism for connecting the hydraulic cylinder and the rear link are required, the number of assembling steps accompanying the increase in the number of parts is increased. However, since the fulcrum for suspending the rear link, that is, the elbow type swing link is provided in the lower part of the machine body, the mower cannot be raised significantly.

An object of the present invention is to make it possible to drive a mower up and down largely without increasing the number of parts.

[0005]

A characteristic feature of the present invention for achieving the above object is that the rear link and the lower link are connected via a lifting rod so that the mower can be driven up and down.

[0006]

As shown in FIGS. 1 and 2, the lift arm 11
When the lower link 12 is swung upwards by the above, the lifting rod 14 connected to the lower link 12 is pulled rearward, and the rear link 8 is lifted up.

[0007]

As described above, since the rear link is directly lifted by the lower link via the lifting rod, the conventional tractor is simply provided with the lifting rod, and the mower is driven up and down with a simple and inexpensive structure. It will be possible.

Moreover, since there is no fulcrum of the link mechanism for lifting the rear link between the mower and the lower part of the fuselage, the mower can be greatly lifted to the ground, and rocks, stumps, etc. It is possible to avoid contact with the above-mentioned ground protrusion.

[0009]

EXAMPLE As shown in FIG. 1, an engine 1, a main clutch case 2 and a traveling mission case 3 are integrally connected,
Front and rear wheels 5 of an agricultural tractor composed of a traveling body A having a vehicle body monocoque structure in which front steering wheels 5 are forwardly projected from an engine 1 and driving rear wheels 6 are pivotally supported by a traveling mission case 3 respectively. 6 through a parallel link mechanism 9 composed of a front link 7 and a rear link 8
Is attached by hanging, and the rear link 8 and the lower link 12 that is vertically swung by the lift arm 11 at the rear of the machine body are connected to each other via the arm 13 connected to the lower link 12 and the lifting rod 14. The lift arm 1
A mid-mount type riding lawn mower that drives the mower 10 to move up and down in accordance with the vertical movement of No. 1 is configured.

A long hole 14 is provided at the rear end of the lifting rod 14.
a, the connecting pin 13a of the arm 13 is positioned in the middle of the long hole 14a, and the gauge wheel 22 of the mower 10 is provided.
A floating work mode in which the ground is grounded to perform the mowing work and a suspending work mode in which the connecting pin 13a of the arm 13 is positioned at the rear end of the elongated hole 14a and the gauge wheel 22 of the mower 10 is slightly floated above the ground are selected. You can do it.

A front end of the front link 7 of the parallel link mechanism 9 is provided with a lever-operated hook 16 which is swingably switchable around a horizontal axis X with respect to a bracket 15 provided at a lower portion of the front frame 4. The rear end of the rear link 8 is detachably connected to the bracket 17 provided at the lower portion of the main clutch case 2 via the connecting pin 18.

As shown in FIG. 1, the rear link 8 is
The rear end portion is connected to a bracket 21b on the upper surface of the cutting blade housing 20 via a connecting pin 19b, and the rear end of the rear link 8 is connected to the front end of the lifting rod 14 via a connecting pin 19a. There is. Then, in order to apply the suspension load of the mower 10 to the rear link 8 and the lifting rod 14 evenly, in the grounding state of the gauge wheel 22, the imaginary path passing through the connection point a between the rear link 8 and the lifting rod 14 is assumed. The connecting point between the lower link 12 and the lifting rod 14 and the length of the rod 14 are set so that they have substantially the same angle with respect to the vertical line.

Further, on the upper surface of the cutting blade housing 20, in the state where the mower 10 is fully raised,
A rattling prevention tool 23 for absorbing lateral rattling generated at the pin connecting portion between the rear links 7 and 8 and the brackets 21a and 21b is provided, and the rattling prevention tool 23 is provided.
As shown in FIGS. 7 and 8, the upper part of the plate of the preventive tool 23 is bent laterally, and the bent portion 23a is moved to the plate 24 on the fuselage side as the mower 10 approaches the maximum rise.
The cutting blade housing 20 is moved in the lateral direction so as to absorb the lateral play generated in the pin connecting portion by contacting it with the lower end of the pin connecting portion, and in this state, the rattling preventive tool 23 and the plate on the machine body side are moved. 24 is connected via a pin to prevent rattling of the mower in the front / rear and left / right directions when the mower is in the retracted state.

[Other Embodiment] In the above embodiment, the lifting rod 14 is connected to the rear end of the rear link 8, but it may be connected in the middle of the rear link 8.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1] Overall side view

FIG. 2 is a side view showing the mower lifting state.

FIG. 3 is a plan view of the front of the machine body.

FIG. 4 is a plan view of mower.

FIG. 5 is a side view showing a front link connection state.

FIG. 6 is a partially cutaway front view of the same.

FIG. 7 is a side view showing a moor backlash preventing structure.

FIG. 8 is a partially cutaway front view of the same.

[Explanation of symbols]

 7 Front link 8 Rear link 9 Link mechanism 10 Mower 11 Lift arm 12 Lower link 14 Lifting rod A Traveling machine

Claims (1)

[Claims] 1. A front link (7) and a rear link (8) are provided at a lower portion of a traveling body (A) having a lower link (12) swingable up and down by a lift arm (11) at a rear portion of the body. Via a link mechanism (9) consisting of
In the riding lawn mower in which (0) is mounted in suspension, the rear link (8) and the lower link (12) are connected via a lifting rod (14) so that the mower (10) can be driven up and down. Riding lawn mower configured.