JPS631791Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a grass-cutting attachment that is attached to an arm of a shovel vehicle that can be freely operated up and down and bent and extended, in place of a bucket.

Conventionally, to configure the above-mentioned mowing attachment, a bracket-shaped mounting member for attaching it to the arm is fixed to the mowing device portion of the mowing attachment, and a link is provided for attaching the mounting member and a bucket on the arm side. The parts were connected using pins or bolts, but because the mowing device part is rigidly connected to the arm, the arm must be mowed frequently while swinging up and down and bending and stretching. However, when the mowing device comes into contact with the ground or other objects such as rocks, the impact often damages the mowing device.

In view of the above-mentioned conventional situation, the purpose of the present invention is to provide a simple improvement to the mounting member of the mowing attachment, so that the mowing device part can withstand impact forces from all directions caused by contact with the ground or other objects. The purpose is to avoid damage and to enable good work to be done depending on the work situation, such as when mowing grass in a pinched area or cutting down weeds that have grown on the slope of a river.

The characteristic configuration of the present invention is that, in the above-mentioned grass cutting attachment, the mounting member for connecting to the arm and the grass cutting device part are connected by a rod-type connector that allows only the approach and relative rocking of the two; A spring is interposed between the mounting member and the mowing device portion, and the spring is deformed as the two approach and relative swing, and the mowing device portion is positioned around the vertical axis relative to the mounting member. The reason is that it is configured to be changeable.

In other words, even if the mowing device comes into contact with another object such as a protruding object on the ground during mowing work, the impact force in all directions due to that contact is absorbed by the mowing device and the mounting member of the rod-type coupling. Because it can be buffered by the approach and relative rocking action of the
Compared to attaching the mowing device section rigidly to the arm, it has become possible to more reliably prevent contact damage to the mowing device section. Furthermore, the mowing device itself is not modified, and only the connection structure between the attachment member for the arm and the mowing device is simply improved, so the existing mowing device can be used as is, which is economical. I was able to make it even more advantageous.

Furthermore, since the mowing device portion is configured to be repositionable around the vertical axis with respect to the mounting member,
As shown in Figure 5 A, the mowing device can be positioned at the front of the machine for mowing work in narrow spaces, and as shown in Figure 5 B, the mower can be positioned on the side of the machine to cut grass in rivers. When cutting weeds that have grown on slopes, etc.
Able to perform good work depending on the work situation.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG. 1, a swivel base 2 is connected to a machine base equipped with a wheel-type traveling device 1 so as to be able to drive and rotate freely around the vertical axis P. In addition to providing a driving unit 4, a boom 6 is attached to the base bracket 5, an arm 7 is attached to the boom 6, an excavation bucket 8 is attached to the arm 7, and a hydraulic cylinder 9 is attached to each.
An arm working device 10 is connected to the front edge of the swivel base 2 so as to be able to swing vertically and to bend and extend, and is connected to the front edge of the swivel base 2 so as to be able to swing left and right to form an arm working vehicle.

As shown in FIG. 2, the arm 7 is configured so that a grass-cutting attachment-type working machine 12 can be connected thereto in place of the digging bucket 8 via a link mechanism 13 for attaching the bucket 8.
It is configured so that the ground excavation work by the bucket 8 and the attachment type work machine 12 for mowing can be connected via a link mechanism 13 for attaching the bucket 8, and the ground excavation work by the bucket 8 and the attachment type work machine 12 for mowing the grass can be connected via a link mechanism 13 for attaching the bucket 8. The structure is such that the mowing work performed by No. 12 can be performed alternatively.

As shown in FIGS. 3 and 4, the grass-cutting attachment-type work machine 12 includes a dome-shaped cover member 14 whose bottom side is open, and a plurality of rotary grass-cutting blades 15 arranged in parallel in the longitudinal direction. A hydraulic pump 1 for driving a work machine is installed in the drive unit 4 on the outer wall of the cover member 14.
7 is connected to a hydraulic motor 20 via a pressure oil pipe 19 with a control valve and a joint 18 that can be freely connected and disconnected, and the power from the hydraulic motor 20 is transmitted at a reduced speed to the mowing blade drive rotary shaft 16. Integrally install the chain transmission case 21 for
A mowing device portion 12a is configured to be turned on and off by operating a control valve from the driving section 3. In order to configure the connecting portion to the arm 7, a plate-shaped support member 22 is fixedly installed approximately at the center of the upper surface of the cover member 14. A large-diameter cylindrical main rod 23 whose central axis is the vertical central axis Q of the mowing device portion 12a that is substantially orthogonal to each other; Four bolt-shaped rods 24 are set upright with their phases shifted by 90 degrees so that the two rods are aligned, and a pair of left and right rods 24 are installed to pivotally connect the ends of each link of the link mechanism 13 on the arm 7 side. bracket-shaped portion 25a of
An accommodating hole 26 for each of the bolt-like rod 24 and the main rod 23 is formed in the bottom wall 25b of the mounting member 25, which has a U-shaped opening upward in longitudinal section.
With each bolt-shaped rod 24 secured to the accommodation hole 26 by a nut 27, and the main rod 2
The supporting member 22 and the mounting member 2 are inserted into each other while being prevented from coming off by a washer 29 which is fixed with a bolt 28 screwed onto the end face of the supporting member 22 and the mounting member 2.
5. A coil spring 30 is inserted between the main rod 23 and the bottom wall 25b to press and bias the mounting member 25 away from the main rod 23, and then the mounting member 25 is attached to the mowing device part 12a. On the other hand, it is installed in such a way that the approach and relative rocking of both of them is resisted against the biasing force of the spring 30, but is allowed by the flexible part between the flexible hole 26 and each rod 23, 24, and the mowing work is carried out. Even when the mowing device part 12a comes into contact with a protruding object on the ground, the impact force caused by the contact is absorbed by the action of allowing the mowing device part 12a and the mounting member 25 to approach and relative swing, and by the spring 30.
The mowing device portion 12a is buffered with a biasing action of
By replacing the bolt-shaped rod 24 with the flexible hole 26, the mowing device part 12a is inverted 90 degrees around the central axis Q with respect to the mounting member 25, and the mowing device part 12a is rotated 90 degrees around the central axis Q, as shown in FIG. , B, the mower part 12a is positioned at the front of the machine for mowing work in narrow spaces, and the mower part 12a is positioned on the side of the machine to remove weeds that have grown on river slopes. The mowing device portion 12a is configured to be able to change its orientation relative to the arm 7 depending on the work situation, such as when mowing.

In addition, the mowing device part 12a and the mounting member 25 are
The specific connection structure in which the two are connected by one or more rods in a state that only allows the approach and relative rocking of the two can be changed in various configurations.
Those rods and nut 2 for that rod
7. Fixing devices such as washers 29 and bolts 28 are collectively referred to as rod-type connectors 23 and 24.

Further, the specific mowing structure of the mowing device portion 12a can be modified in various conventionally known configurations.

The mowing attachment according to the present invention can be applied to various types of shovel vehicles equipped with various arm-type shovel devices such as backhoe devices and front shovel devices.

Furthermore, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the mowing attachment for a shovel vehicle according to the present invention, with FIG. 1 being an overall side view, FIG. 2 being a side view showing the attached state of the mowing attachment, and FIG. A vertical cross-sectional view of the attachment, Figure 4 is a cross-sectional view taken along the - line in Figure 3,
FIGS. 5A and 5B are schematic plan views showing the state of mowing work, respectively. 7...Arm, 8...Bucket, 12...Mowing attachment, 12a...Mowing device part, 1
5...Mowing blade, 16...Drive rotation shaft, 23, 24...
...Rod type connector, 25...Mounting member, Q...Axle core.

Claims (1)

[Scope of utility model registration request] A mowing attachment 12 is attached in place of the bucket 8 to an arm 7 that can be operated up and down and in bending and extending directions of a shovel vehicle, and includes a mounting member 25 for connecting to the arm 7 and a mowing device part 12a. They are connected by rod-type connectors 23 and 24 that allow only relative rocking, and a spring 30 is interposed between the mounting member 25 and the mowing device part 12a, which is deformed as the two approach and relative rock. A mowing attachment for a shovel work vehicle, characterized in that the mowing device portion 12a is configured to be repositionable around the vertical axis Q with respect to the mounting member 25.