JPH0853051A - Vehicle for work - Google Patents

Abstract

PURPOSE:To provide a vehicle for work which serves as a protector for the front surface of a tractor, by securing the free release of a lift arm and installing a stand having a simple structure. CONSTITUTION:On both sides of the front surface of a tractor body 1, each supporting bracket 6 which supports a stand 5 in a bulging-out state forwardly from the front surface of the tractor body 1 is installed, and a holding tool 7 for holding the stand 5 in a demountable manner is installed at a part of the bracket 6, and a holding tool 8 which holds the stand 5 in a demountable manner is installed at a part of a lift arm 3, and the stand 5 is mountedly held selectively on the lift arm 3 and the front surface of the tractor body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle in which various work devices are detachably mounted on a front portion of a tractor body via a lift arm.

[0002]

2. Description of the Related Art In this type of work vehicle, a stand is used to support the work equipment separated together with the lift arm in a state where it can be easily rejoined when used next time. Conventionally, this stand has been classified into a system separately from the lift arm and a system integrally formed.

[0003]

In the system in which the stand is formed separately from the lift arm, the stand is stored in a warehouse or the like while the lift arm is connected to the tractor body and used. This method has problems in that the lift arm cannot be freely detached at a place other than the storage place of the stand, and the stand may be lost.

On the other hand, the system in which the stand is constructed integrally with the lift arm adopts a telescopic or foldable structure so as not to hinder the work when the lift arm is connected to the tractor body. However, there is a problem in that the structure becomes complicated and the cost increases. In addition, in this case, if the stand is installed on the lift arm, the visibility of the work is obstructed by that much, and in addition, there is a problem that the lifting force of the crop by the lift arm is reduced by the weight of the stand. .

On the other hand, when the lift arm and the working equipment are connected to the tractor body for working, for example, when the agricultural products or the like are loaded on the bed of a truck or when an object is put on a high place, the working equipment is used via the lift arm. Since the front of the tractor body is left unprotected, the front of the tractor body may collide with the tilt or side wall of the truck bed and damage the headlights. If the protector is installed in, the cost will increase accordingly.

The present invention has been proposed in order to solve these problems, and its purpose is to allow the lift arm to be freely detached anywhere, to simplify the structure of the stand, and also to improve the stand. Accordingly, it is an object of the present invention to provide a working vehicle that doubles as a protector on the front surface of the tractor body.

[0007]

In order to achieve the above object, the present invention relates to a work vehicle in which various work equipments are detachably and replaceably mounted on a front portion of a tractor body through a lift arm. A stand for supporting the detached lift arm and working equipment is detachably attached to the lift arm, and when the lift arm and working equipment are connected to the tractor body, the stand is provided on both sides of the front part of the tractor body. The protector protects the front surface of the tractor body by being detachably attached to the front surface of the tractor body in a state of protruding from the front surface.

Further, according to the present invention, support brackets are provided on both sides of the front surface of the tractor main body for supporting the stand in a state of being protruded forward from the front surface of the tractor main body. On the other hand, a holding tool for detachably mounting the stand is provided on part of the lift arm, and the stand is selectively mounted and held on the lift arm and the front surface of the tractor body. is there.

[0009]

When the lift arm is attached to the tractor body and the work equipment is used for the work, the stand does not need to be used. Therefore, the stand is attached to both front portions of the tractor body to protect the front surface of the tractor body. Used as a protector. As a result, damage to the front of the tractor body during work can be reduced, the stand can be prevented from being lost, and the stand can always be carried to the work place, so the lift arm can be freely removed anywhere. Can be done. Moreover, the visibility of the lift arm is not hindered and the lifting force is not reduced.

Further, since the stand is detachably attached to a part of the lift arm via the holder, it is not necessary to have a complicated structure such as a telescopic type and a foldable type, and the structure is simple and inexpensive. You can

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a work vehicle according to the present invention in a state where a lift arm is connected, FIG. 2 is a side view of a work vehicle according to the present invention in a state where a lift arm is detached, and FIG. Is an enlarged side view of the connection frame and the connection hitch in a separated state, (B) is a schematic perspective view of the support bracket portions of the stand installed on both front portions of the main frame, and (C) is a view of the lift arm side stand. The schematic perspective view of a holder is shown.

1 and 2, (1) is a tractor body, (2) is a main frame mounted on both front sides of the tractor body, (3) is a lift arm, and (4) is a working machine,
(5) is a stand, (6) is a support bracket for the stand installed on both sides of the front of the main frame, (7) is a holder for the stand attached to the support bracket, and (8) is installed on a part of the lift arm. Stand holder, (9) is a hitch for connecting the lift arm installed on the main frame, (10)
Is a connecting frame installed at the rear end of the lift arm, (1
1) is a lift cylinder, (12) is a dump cylinder,
(13) indicates a parallel link.

The tractor body (1) has a driver seat on the vehicle body,
It is equipped with an engine, a hydraulic pressure generation unit and their operating means, and a main frame (2) of a lift arm (3) is mounted on both sides of the front part.

Main frame (2) of the lift arm (3)
Has a support bracket (6) for the stand (5) at the front end and a lift arm connecting hitch (9) at the rear end, and is mounted symmetrically on both front sides of the tractor body (1). There is.

The lift arm (3) has a connecting frame (10) pivotally attached to its rear end, and the connecting frame (1)
It is installed so that it can be moved up and down by a lift cylinder (11). Further, the lift arm (3) has a working machine (4) such as a bucket at the tip thereof and a dump cylinder (1).
It is pivotally attached so that it can be operated as a squeeze dumper via 2).
The parallel link (13) is for moving the working equipment (4) at the tip in parallel to the tractor body (1) or the ground when the lift arm (3) is moved up and down.

The work equipment (4) includes various work means such as a bucket, a hay fork, and an earth dumping plate, which are detachably attached to the tip of the lift arm (3).

As shown in FIG. 3 (A), the lift arm connecting hitch (9) has a substantially horizontal U-shaped first hook portion (9a) which is opened forward and has a lower jaw longer than the upper jaw. And a cylindrical body (9c) having a second pin hole (9b) are installed. Corresponding to this, the connecting frame (10) has a first pin (10a) and a second pin hole (10b). ), Is opened toward the diagonally upper rear side, and is provided with a second hook portion (10c) having a substantially diagonal U shape in which the upper jaw is longer than the lower jaw. Further, these are engaged and connected as follows. That is, the first pin (10a) and the first hook part (9a) are engaged with each other, and the second pin hole (9b) has a cylindrical body (9c) and a second body (9c).
The second hook portion (10c) having the pin hole (10b) is engaged, and the second pin (14) is inserted into each of the second pin holes (9b) and (10b) to be engaged and coupled at two points. To be done. At the time of detachment, the second pin (14) is pulled out from each of the second pin holes (9b) and (10b) and detached.

In the case of this embodiment, the stand (5) is in the shape of a square pipe, and the support plate (5a) is installed at the tip,
A pin hole (5b) is formed in a part of the way so as to penetrate in the lateral direction.

The support brackets (6) of the stand (5) installed on both sides of the front of the main frame (2) are shown in FIG. 3 (B).
As shown in FIG. 4, the stand (5) is detachably held by a holder (7) having a substantially U shape. The holding tool (7) includes a holding pin (7a) fixed to a part of the support bracket (6) with a string or the like so as not to be lost, and an eccentric pivotally attached to a part of the support bracket (6). Cam (7
b) and. The holding pin (7a) is inserted into the pin hole (5b) of the stand (5) and aligned with the pin hole (6a) formed in a part of the support bracket (6) to support the stand (5). The bracket (6) is positioned and held. The eccentric cam (7b) is for holding the stand (5) with respect to the support bracket (6) so as not to rotate in the front-rear direction. A handle (7c) is integrally attached to the eccentric cam (7b), and the stand (5) is attached to the support bracket (6) via the eccentric cam (7b) by its own weight. It is configured to maintain the held state. The holding state of the stand (5) by the support bracket (6) is configured so that the front surface of the tractor body (1) can be protected in a state where the stand (5) projects forward from the front surface of the tractor body (1). There is.

The holder (8) of the stand (5) installed on a part of the lift arm (3) is, as shown in FIG. 3 (C), laterally between both side walls of the lift arm (3). The bracket (8a) is attached to the arranged rod (3a), the pin (8b) is fixed to the bracket (8a) in parallel with the rod (3a), and the pin (8b) and the rod (3a) are fixed.
Insert the stand (5) between and and lift arm (3)
Is to support. This stand (5)
Is configured to support the lift arm (3) by using two left and right, and the bracket (8a) and the pin (8b) are symmetrically formed on both sides of the lift arm (3) to form the rod (3a). It is installed. In the embodiment shown in the drawings, the bracket (8a) and the pin (8b) are attached to the upper side of the rod (3a) in the drawing, but they may be attached to the lower side of the rod (3a). Good. When the two stands (5) and (5) are inserted between the pin (8b) and the rod (3a), the holder (8) having the above-described configuration has tips of the respective stands (5) and (5). Even if the heights of the ground contact surfaces are not the same and there is a step, there is an adjusting function that the step can be absorbed by pulling out or inserting one of the steps.

Connection of hydraulic pipes (not shown) to the lift cylinder (11) and the dump cylinder (12) mounted on the lift arm (3) is carried out by a hydraulic unit mounted on the tractor body (1). It is configured to be detachably connected by a coupler.

An embodiment of the present invention has the above-mentioned configuration,
Next, the operation will be described. In the disengaged state of FIG. 2, the tractor body (1) is moved closer to the lift arm (3), and a lift arm connecting hitch () of the main frame (2) mounted on both front side surfaces of the tractor body (1). 9) engage the connecting frame (10) pivotally attached to the rear end of the lift arm (3). This engagement is done by the first pin (10
a) and the first hook portion (9a) are engaged with each other, and
A cylindrical body (9c) having a pin hole (9b) and a second pin hole (1
0b) having a second hook portion (10c),
In this state, each second pin hole (9b) (10b)
The lift arm (3) can be integrally connected to the tractor body (1) at two points by inserting the second pin (14) into the. The connecting pin (14) is provided with an appropriate retaining means so as not to fall off inadvertently. After connecting the lift arm (3) to the tractor body (1) in this manner, the hydraulic coupler is connected. Then, the stands (5) and (5) are pulled out from the holders (8) of the lift arm (3) and attached to the support brackets (6) on both front sides of the main frame (2) mounted on the tractor body (1). Then, insert the pin (7a) by aligning the pin hole (6a) of the support bracket (6) with the pin hole (5a) of the stand (5), and insert the pin (7a) into the eccentric cam (7b) of the holder (7). The handle (7c) is rotated in the holding direction and the eccentric cam (7b) presses and holds the stand (5) on the support bracket (6). This way, the stand (5)
(5) is a pin (7a) on the support bracket (6) (6)
Is securely fixed by the eccentric cam (7b) and does not fall off during work.

The front of the tractor body (1) is protected by the stands (5) and (5). In this state, the tractor body (1) is steered to properly operate the direction switching valves of the lift cylinder (11) and the dump cylinder (12), and the working equipment (4) attached to the tip of the lift arm (3). To work. Since the front surface of the tractor body (1) is protected by the stands (5) and (5), members such as headlights mounted on the front surface of the tractor body (1) are protected from damage due to a collision or the like. be able to.

The lift arm (3) is attached to the tractor body (1).
When the lift arm (3) is raised, the connecting pin (14) between the connecting frame (10) and the connecting hitch (9) is pulled out. And FIG.
As shown in, the lift cylinder (11) is contracted to lower the lift arm (3), and the working equipment (4) at the tip is grounded on the ground. As a result, the connecting frame (1
0) pivots in the direction in which it disengages from the connecting hitch (9). Then, the stands (5) (5) are pulled out from the support brackets (6) (6) and inserted into the holders (8) of the lift arm (3). When the dump cylinder (12) is contracted in this state, the rear end side of the lift arm (3) is lifted and the connecting frame (10) is disengaged upward from the connecting hitch (9) of the tractor body (1). In this state, the tractor body (1) is slightly retracted, the engine of the tractor body (1) is stopped, the hydraulic pump of the hydraulic unit is stopped, and in this state, the dump cylinder (12) is stopped.
The directional control valve is operated to release the hydraulic pressure remaining in the dump cylinder (12), and the lift arms (3) are supported by the stands (5) and (5) in a stable posture. Also,
If necessary, the hydraulic pressure remaining in the lift cylinder (11) is likewise released. In this state, the hydraulic coupler is removed. In this way, when the lift arm (3) is separated from the tractor body (1), the dump cylinder (1
The residual hydraulic pressure in 2) and the lift cylinder (11) is released in order to facilitate the coupling of the hydraulic coupler in the next time. This completes the work of detaching the lift arm (3) from the tractor body (1).

In the above-mentioned embodiment, the stand (5) is shown in the shape of two right and left square pipes, but other shapes may be used. Further, the holder of the stand (5) is not limited to the illustrated embodiment, and an appropriate holding means may be adopted.

[0026]

According to the present invention, the stand of the lift arm detachably attached to the front portion of the tractor body is attached to both front portions of the tractor body when the lift arm is used, and the front surface of the tractor body is attached. Since it is used as a protector for the lift arm, damage to the front surface of the tractor body during work can be reduced, loss of the stand can be prevented, and the stand can always be carried to the work place. Can be freely detached anywhere. Moreover, the visibility of the lift arm is not hindered and the lifting force is not reduced.

Further, since the stand is detachably attached to a part of the lift arm via the holder, it is not necessary to have a complicated structure such as a telescopic type or a foldable type, and the structure is simple and inexpensive. You can

[Brief description of drawings]

FIG. 1 is a side view of a working vehicle according to the present invention in a state in which a lift arm is connected.

FIG. 2 is a side view of the work vehicle according to the present invention in a state where the lift arm is detached.

FIG. 3A is an enlarged side view of a connection frame and a connection hitch separated from each other, and FIG. 3B is a schematic perspective view of a support bracket portion of a stand installed on both front sides of a main frame;
(C) is a schematic perspective view of a holding tool of a stand on the lift arm side.

[Explanation of symbols]

 1 Tractor Main Body 2 Main Frame 3 Lift Arm 4 Working Equipment 5 Stand 6 Support Bracket 7 Holding Tool 8 Holding Tool 9 Connecting Hitch 10 Connecting Frame 11 Lift Cylinder 12 Dump Cylinder 13 Parallel Link 14 Second Pin

Claims (2)

[Claims] 1. In a working vehicle in which various work devices are detachably attached to a front part of a tractor body via a lift arm, a lift arm detached from the tractor body and a stand for supporting the work device are lifted. The stand is detachably attached to the arm, and when the lift arm and working equipment are connected to the tractor body, the stand is detachably attached to both sides of the front part of the tractor body on the front sides of the tractor body. A working vehicle characterized by being used as a protector for protecting the front surface of the tractor body. 2. A support bracket for supporting the stand in a state of projecting forward from the front surface of the tractor body is provided on both sides of the front surface of the tractor body, and a holding tool for detachably holding the stand is installed on a part of the support bracket. On the other hand, a holder for detachably mounting the stand is provided on a part of the lift arm, and the stand is selectively mounted and held on the lift arm and the front surface of the tractor body. Item 1. The work vehicle according to item 1.