JPH0132836Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a mower mounting structure for a working vehicle.

Conventionally, when attaching a mower to a traveling vehicle body,
It was integrally attached to a support member that was attached to the vehicle body so that it could be moved up and down. However, when a mower collides with a stone, etc., the impact force is concentrated on the mower, which causes the blade to easily break, and its lifespan is short, requiring frequent replacement, making it extremely uneconomical. It was hot.

In view of the above-mentioned points, the purpose of this invention is to enable the mower to perform mowing work well under normal conditions, while suppressing damage to the blade body when it collides with stones, etc., and extending its lifespan. .

In order to achieve the above-mentioned object, the worker's mower mounting structure according to the present invention connects a second support member that can be raised and lowered via a drive mechanism to a first support member that is detachably attached to the front part of a traveling vehicle body. A mower is attached to the second support member so as to be able to swing back and forth about an axis facing in the left-right direction of the vehicle body, and a mower is provided between the mower and the second support member such that the mower is set more than the forward position of the mower. The mower is characterized in that it is provided with a stopper that prevents displacement of the mower, and a bullet that provides resistance to rearward displacement of the mower.

In other words, under normal circumstances, the mower is brought into contact with the stopper by the biasing force of the ammunition, and its posture relative to the ground is maintained at a predetermined position. However, when the blade collides with a stone, etc., the mower is forced to contact the stopper with the biasing force of the ammunition. It swings backwards against the

Therefore, under normal conditions, grass mowing work can be performed well in a predetermined posture, but when colliding with a stone, etc., the large impact force concentrated on the blade body at the initial stage is absorbed by the backward swinging motion. It can be alleviated by
Breakage of the blade due to collisions with stones, etc. can be effectively suppressed, the life of the blade is extended, and it is extremely economical.

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

A pair of left and right driving front wheels 1, 1 are mounted on an axis, and an engine 2 and a hydraulic unit 3 are mounted, and
A front body 6 with a handle 4 and a driver seat 5
A rear vehicle body 9 on which a pair of left and right drive rear wheels 7, 7 are mounted and a cargo platform 8 is mounted is connected rotatably around a vertical axis P, and the front and rear vehicle bodies 6, 9 are operated. A so-called folding-body transport vehicle, which is an example of a working vehicle, is constructed by connecting cylinders for transportation (not shown).

Mowers 11, 11 for mowing work are connected to the front horizontal frame 6a of the front vehicle body 6 via a connecting device 10 so as to be freely disconnectable.

The connecting device 10 is connected to a first connecting member 12 via a single-acting hydraulic cylinder 13 to a second connecting member 14 that is movably raised and lowered, and to the second connecting member 14 so that the connection can be released. and a third connecting member 15 to which the mower 11 is detachably attached.

The first connecting member 12 connects the upper and lower ends of a pair of left and right channel-shaped side frames 16, 16 to a horizontal frame 17.
The side frames 16, 16 are connected by
A mounting member 18 for bolting to the horizontal frame 6a is connected to the lower end of each.

The second connecting member 14 is connected to the first portal frame 1
9 is connected to a second gate-shaped frame 20, extending from the reinforcing intermediate horizontal frame 20a of the second gate-shaped frame 20 to both left and right lower ends of the second gate-shaped frame 20, respectively,
Inverted V-shaped support portions 21 made of square pipes are provided in series,
In addition, a guide roller 22 is rotatably mounted on a shaft at the top. Said first portal frame 19
A pair of upper and lower guide rollers 23, 23 are freely rotatably mounted on the left and right vertical frame portions 19a, 19a, respectively.
And, the horizontal frame portion 19b of the first portal frame 19
is connected to the lower horizontal frame 17 of the first connecting member 12 via a single-acting hydraulic cylinder 13, and the second connecting member 14 is driven up and down with respect to the first connecting member 12. .

The third connecting member 15 is a channel-shaped inverted V-shaped locking member 24 that has substantially the same shape as the support portion 21.
A cylindrical first frame 25 is provided protrudingly from the first frame 25.
A second frame 26 is attached to a frame 25 so as to be rotatable around its longitudinal axis _Q1 .

The support portion 21 is provided at the top of the locking member 24.
An opening 27 is formed through which the guide roller 22 provided in the second connecting member 14 projects. is lowered, and as the vehicle runs, the guide roller 22 is positioned below the opening 27 of the third connecting member 15 to which the mowers 11, 11 are attached.
By driving the connecting member 14 upward, the opening 2
The roller 22 is passed through the mower 7, and the mowers 11, 11 are connected in a suspended state while the locking member 24 is mounted and supported by the support portion 21.

A hydraulic motor 28 is attached above one of the mowers 11, 11, and a motor shaft 28a of the hydraulic motor 28 and a horizontal transmission shaft 29 are interlocked and connected via a belt type transmission mechanism B. The drive shafts 11a, 11a of 11, 11 are interlocked and connected via a bevel gear mechanism (not shown),
Even if an overload is applied to the mowers 11, 11, it is configured to prevent the slippage of the belt type transmission mechanism B from affecting the hydraulic motor 28.

A first transmission case 30 that covers the transmission shaft 29,
Retaining members 31 and 3 are provided at both ends of the second frame 26.
1, the second transmission case 32 is rotatably held around the longitudinal axis _Q2 of the first transmission case 30 and covers the drive shafts 11a, 11a.
32 and the left and right lower ends of the locking member 24 are connected via a connecting rod 34 with a coil spring 33 interposed therebetween, and by adjusting the locking position of the lock nut 35, the lock nut 35 is cut so that it is located slightly lower toward the front. Although the normal ground posture can be changed by adjusting the angle, if it collides with another object such as a stone, the mower 1 will swing backward against the biasing force of the spring 33.
1 and 11 from being damaged.

An arm 36 is connected to the first frame 25, a screw shaft 38 is connected to each end of the arm 36 via a ball joint 37, and a coil spring 39 is interposed between the ends of the screw shaft 38. In this state, the hole 40 formed in the retaining member 31
The mower 11 is inserted into and locked into the mower 11, so that even if the ground is sloped left and right and a pushing force is applied to one of the mowers 11, the second frame 2 resists the biasing force of the spring 39.
6 is configured to swing and tilt in the left-right direction of the fuselage to alleviate the impact caused by the above-mentioned push-up.

When the mowers 11, 11 are working,
Release the hydraulic lock by the single-acting cylinder 13,
The bowl-shaped grounding member 41 connected to the lower part of each mower 11, 11 is grounded, and the mower 1
1 and 11 follow the ground.

To drive the front and rear wheels 1 and 7, transmission shafts 43 and 44 are provided protruding from the transmission case 42, which receives power from the engine 2, respectively, and the front transmission shaft 43 and the front wheel differential mechanism 45 are connected to each other. The input shaft 46 is interlocked and connected via a universal joint 47, and the intermediate shaft 48 is interlocked and connected to the rear transmission shaft 44 via a universal joint 49, and the intermediate shaft 48 and rear wheel differential mechanism 50 are connected together. The input shaft 51 is interlocked and connected to the input shaft 51 via a universal joint 52.

As shown in FIG. 5, a bowl-shaped cover 53 is attached to the front end of the front transmission shaft 43 so as to cover the universal joint 47. If mud or the like adheres to the pivot part of the universal joint 47, the oil seal at the pivot part may become damaged. It is designed to effectively prevent early damage and deterioration. In the figure, reference numerals 54 and 54 indicate openings through which tools are inserted for attaching and detaching bolts 55 and 55.

Note that the rear end of the intermediate shaft 48 has a similar configuration.

In the above embodiment, the second connecting member 14 is attached to the first connecting member 12 attached to the vehicle body so as to be able to rise and fall freely, and the third connecting member 15 to which the mowers 11, 11 are attached is suspended and held from the second connecting member 14. Although the mowers 11, 11 can be easily attached to the vehicle body by
The mower 11 may be directly attached to the second connecting member 14 without the connecting member 15, and various structural modifications are possible for the first connecting member 12. On the other hand, those consisting of the second connecting member 14 and the third connecting member 15, those consisting only of the second connecting member 14, etc. are collectively referred to as the second supporting members 14, 15.

Further, in the above embodiment, forward swinging of the mower 11 is prevented by a lock nut 35 on the rear side screwed onto a connecting rod 34 interposed with a coil spring 33 as an example of a bomb. However, in the present invention, for example, a support frame is connected to the locking member 24 in addition to the connection rod 34, and the forward swing of the mower 11 is controlled by the support frame with the second transmission case 32. Various structural modifications are possible, such as providing a stopper plate for stopping by abutment, and these modifications are collectively referred to as a stopper 35.

In order to drive the second connecting member 14 up and down, it is not limited to the single-acting hydraulic cylinder 13, but various modifications are possible, such as using a chain and driving the sprocket for the chain with hydraulic pressure or an electric motor. , these are collectively referred to as the drive mechanism 13.

[Brief explanation of drawings]

The drawings show an embodiment of the mower mounting structure for a working vehicle according to the present invention, and FIG. 1 is an overall side view of the folding-body transport vehicle with the mower installed, and FIG. 2 is an enlarged side view with a partial cutaway of the main part. Figure 3 is an enlarged partially cutaway front view of the main parts, Figure 4 is an exploded perspective view of the mower and coupling device,
FIG. 5 is a partially cutaway side view of the main part. 11...Mower, 12...First support member, 13
... Drive mechanism, 14, 15 ... Second support member, 3
3... Bullet machine, 35... Stopper, Q ₂ ... Swing axis.

Claims (1)

[Claims for Utility Model Registration] Second support members 14 and 15 are connected via a drive mechanism 13 to a first support member 12 which is removably attached to the front part of a traveling vehicle body.
A mower 11 is attached to the support members 14 and 15 so as to be able to swing back and forth about an axis _Q2 facing in the left-right direction of the vehicle body, and the mower 11 is installed between the mower 11 and the second support members 14 and 15. A stopper 35 that prevents the forward displacement beyond the set value
A mower mounting structure for a work vehicle, comprising: and a bullet 33 that provides resistance to rearward displacement of the mower 11. The structure according to claim 1, which is a registered utility model, wherein the operating position of the stopper 35 can be changed and adjusted in the longitudinal direction of the vehicle body.