JPH09309393A - Front guard device for running vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open/close a bonnet without hindrance even if the front grill part of the bonnet is protected by a front guard. SOLUTION: This device is equipped with a bonnet 8 forming an engine room 9 in such a way as to be freely opened/closed by revolving it in the longitudinal direction via a horizontal axis hinge means 18, and with a front guard 21 protecting a grill part in close vicinity to the front grill part 17 of the bonnet 8 in such a way as to be freely revolved in the longitudinal direction via a horizontal axis hinge means 20. In this case, when the front guard 21 is revolved in the longitudinal direction, it is so designed that the front guard 21 is linked with the bonnet 8 by a link connecting body 22 in such a way that the bonnet 8 is actuated so as to be opened/closed while being followed by its revolution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front guard device for a traveling vehicle.

[0002]

2. Description of the Related Art A traveling vehicle such as a tractor having a bonnet forming an engine room which can be opened and closed by rotating in the front-rear direction via a horizontal hinge means is known. Engine accessories such as engine and radiator are inspected and replaced.

On the other hand, in this traveling vehicle, there is a vehicle equipped with a gate-shaped protector in front and rear view in order to protect the front grill part (having a lamp etc.) of the bonnet. It is provided in front of the grill part. In this way, if the protector is provided away from the front, not only the appearance will be bad, but the product value will be reduced, and the protector will be an obstacle when loading earth and sand, etc., and the front-rear weight balance will be lost. There is a defect.

In order to solve such a problem, the protector may be arranged close to the front grill part.
Japanese Patent No. 46759 (1 of Prior Art), Japanese Utility Model Laid-Open No. 6-1006
It is proposed in Japanese Patent Laid-Open No. 1 (conventional example 2).

[0005]

Although the conventional example 1 is useful as it is, it is a front guard (protector).
Since it cannot be undulated, opening and closing of the bonnet was naturally a detachable structure, and inspection and replacement work of the engine etc. was troublesome. In the conventional example 2, since the front guard can be raised and lowered, it is relatively easy to attach and detach the bonnet with the guard lying down, but it is necessary to separately raise and lower the front guard and attach and detach the bonnet.
This was quite troublesome.

Further, in any of the prior arts 1 and 2, when a load is applied to the front guard during the work, the grill and the grill portion are arranged close to each other, so that the grill portion may be deformed or damaged. there were. Therefore, according to the present invention, even if the front guard is arranged close to the grill portion, the ups and downs of the front guard are interlocked with the opening and closing of the bonnet, so that maintenance in the engine room can be facilitated and a load acts on the front guard. However, it is an object of the present invention to surely protect the grill portion by absorbing or relaxing it or carrying it on the traveling body.

[0007]

According to the present invention, a bonnet 8 forming an engine room 9 is openably and closably pivoted in the front-rear direction via a horizontal hinge means 18, and is attached to a front grill portion 17 of the bonnet 8. In order to achieve the above-mentioned object, a front guard device for a traveling vehicle, which is provided with a front guard 21 that protects the grill portion 17 in close proximity and is rotatable in the front-rear direction via a horizontal hinge means 20, has the following features. Are taking technical measures.

That is, in the present invention, when the front guard 21 is rotated in the front-rear direction, the front guard 21 and the bonnet 8 are linked together so that the bonnet 8 is opened and closed in association with the rotation. When the engine compartment 9 is maintained, the front guard 21 is raised and lowered to open and close the hood 8 when the engine room 9 is maintained. Maintenance can be performed easily and quickly, and at this time, the front guard 21 can be used as a handle to open and close the bonnet 8 easily (claim 1).

Further, one link connecting body 22 may be provided in the central portion in the left-right direction, but by providing a left-right pair, twisting is eliminated during the undulating and opening / closing operations (claim 2). Further, during the work in which the front guard 21 is standing upright and the bonnet 8 is closed, when a load F in the front-rear direction acts on the front guard 21, the link connecting body 22 is provided with an absorbing portion 22C for the load F. By adopting the configuration, it is possible to reliably prevent the grill portion 17 from being deformed or damaged by the load F (claim 3).

Further, in addition to or separately from the absorbing portion 22C, when a load F in the front-rear direction acts on the front guard 21 during the work in which the hood 8 is closed while the front guard 21 is standing upright, the load is applied to the front guard 21. By providing the front guard 21 with the load carrying member 23 for carrying F on the traveling machine body 7, it has become possible to prevent the grill portion 17 from being deformed or damaged (claim 4).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The embodiments of the present invention will be described below. A protector (front guard) device 1 according to the present invention is a biaxial 4-wheel vehicle equipped with a front loader 2 shown in FIG. It is used for the tractor 3.
In FIG. 4, the tractor 3 includes front wheels 4 and rear wheels 5, the front wheels 4 being suspended on the front axle frame 6, and the traveling vehicle 7
An engine is mounted on the engine, and the engine and its accessories (a radiator, a battery, etc.) are housed in an engine room 9 of a hood 8.

The front loader 2 has a pair of left and right masts 11 removably mounted on a support base 10 which is erected and fixed on the left and right of the front and rear intermediate portions of the traveling machine body 7, and a boom 12 is pivotally mounted on the upper portion of the mast 11. A bucket 13 is provided at the tip of the boom 12, and the boom cylinder 14 and the bucket cylinder 15 are provided.
Besides, a pair of left and right brace 16 is provided. Referring to FIG. 1 and FIG. 2, the bonnet 8 has a front bonnet 8A having a front grill portion 17 and a horizontal axis hinge means 18.
It is supported so as to be openable and closable by rotating in the front-rear direction via the radiator, and a radiator 19 is housed in the engine room 9 of the front bonnet 8A.

The front bonnet 8A is provided on a fixed bottom bonnet 8C having an exhaust window 8B, and is supported via a pair of left and right horizontal axis hinge means 18. Brace 16
The front axle frame 6 and the front axle frame 6 are detachably attached at their front ends by bolt means 19, and in this embodiment, they are gate-shaped in a front and rear view through the horizontal hinge means 20 at the tips (front ends) of the left and right braces 16. Protector (front guard) 21
Is rotatably supported in the front-rear direction, and the protector 21 is close to the front grill portion 17 in a standing posture facing the front grill portion 17 and can be changed to a lying posture.

As shown in FIG. 1B, the horizontal hinge means 20 is a bolt 20A screwed to the brace 16 and a tubular collar 20B fitted over the bolt 20A. It is adjustable. When the protector 21 is rotated in the front-rear direction with the horizontal hinge means 20 as a fulcrum, the hood 8, front bonnet 8A in the figure, opens and closes with the horizontal hinge means 18 as a fulcrum in association with the rotation. 21 and the hood 8 are linked by a link connector 22.

The link connecting body 22 may be provided in the center portion in the left-right direction, but it is advantageous to provide the link connecting body 22 in a left-right pair so that the link connection body 22 can be pivoted without being twisted. The link connecting body 22 has one end on the guard 21 and the pin 21.
If it is pivotally attached at A and the other end is pivotally attached to the bonnet 8 at a pin 21B, the structure is arbitrary such as a rod or a flat plate, but as shown in FIG. It is advantageous to make the intermediate connecting portion 21C elastically deformable by forming the plate into a substantially z-shape.

That is, when the front guard 21 is subjected to a load F in the front-rear direction during the work in which the hood 8 is closed while the front guard 21 is standing upright,
The joint portion 21C functions as an elastic portion for the load by elastic deformation, and prevents the bonnet 8 from being deformed or damaged. Further, the right and left legs of the front guard 21 are provided with a carrying member 23 inclined rearward and downward, and an end portion 23A of the member 23 is provided.
It is desirable to prevent the absorbent part 21C from being excessively elastically deformed when the load F is light by slidingly contacting the upper surface of the brace 16.

It should be noted that it is advantageous to form the end portion 23A of the carrying member 23 in an arc shape having a lateral width as shown in FIG. 3 in order to surely propagate the load F to the machine body and carry it.
In addition, the front guard 21 including the carrying member 23 can be used as a handle for rotating operation. When servicing the tractor 3 and the like, the front loader 2 uses the boom cylinder 14
It is customary to hold the boom 12 in the ascending posture by extending and locking the hydraulic circuit.

However, if there is an oil leak, the boom 12
Is not desirable because it falls naturally. Therefore, in the illustrated example, as shown in FIGS. 5 and 6, the boom cylinder 14
When the boom cylinder 14 is extended by mounting the fall preventive tool 24 having a U-shaped cross section that covers the outside of the piston rod 14B by using the pivotally connecting pin 14A as a common pin, and the boom cylinder 14 is extended, the end face receiving portion 24A of the fall preventive tool 24 is connected to the cylinder tube. The end surface of 14C is engaged.

When the front loader is used, the fall prevention tool 24 is stored along the mast 11 formed in a U shape and is held by the pin 25 so as not to fall, so that there is no hindrance during the work of the loader. The preventive tool 24
It is desirable to prevent the rod 14B from being damaged by attaching a buffer 24B such as rubber or resin to the inner surface of the rod.

Further, although the tractor with a loader is used in the embodiment, the present invention can be applied to a tractor with a dozer or a tractor (wheel type, crawler type) without these.

[0021]

As described in detail above, according to the present invention,
Since the bonnet is opened / closed in association with the ups and downs of the front guard, opening / closing of the bonnet will not be a problem even if a guard is provided close to the grill part, and therefore maintenance in the engine room is also improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (1) is a side view,
(2) is a cross-sectional view of a hinge portion, and (3) is a plan view of a link connecting body.

FIG. 2 is a front (front) view of FIG.

FIG. 3 is a side view showing another example of the present invention.

FIG. 4 is a side view of a tractor adopting the present invention.

FIG. 5 is an exploded perspective view of a boom fall prevention tool.

FIG. 6 shows a boom fall prevention state, (1) is a side view,
(2) is a front view of a main part.

[Explanation of symbols]

 8 Bonnet 9 Engine Room 17 Grill 18 Hinge Means 20 Hinge Means 21 Front Guard 22 Link Link

Claims (4)

[Claims] 1. A front grill part (17) of the bonnet (8), which is provided with a bonnet (8) forming an engine room (9) so as to be freely opened and closed by pivoting in a forward and backward direction via a horizontal axis hinge means (18). A front guard (21) for protecting the grill part (17) close to the horizontal axis hinge means (20).
In a front guard device for a traveling vehicle, which is rotatably provided in the front-rear direction via a shaft, when the front guard (21) is rotated in the front-rear direction, the bonnet (8) is opened and closed in association with the rotation. A front guard device for a traveling vehicle, characterized in that the front guard (21) and the hood (8) are linked by a link connector (22) so as to operate. 2. The front guard device for a traveling vehicle according to claim 1, wherein the link connecting bodies (22) are provided as a left-right pair. 3. When a load (F) in the front-rear direction acts on the front guard (21) during the work in which the front guard (21) is in the upright position and the bonnet (8) is closed, the load (F) is applied. The front guard device for a traveling vehicle according to claim 1 or 2, wherein the link connecting body (22) is provided with the absorbing portion (22C). 4. When a load (F) in the front-rear direction acts on the front guard (21) during a work in which the front guard (21) is upright and the bonnet (8) is closed, the load (F) is applied. The front guard device for a traveling vehicle according to any one of claims 1 to 3, wherein the front guard (21) is provided with a load carrying member (23) for carrying the vehicle on a traveling machine body (7).