JPH08156845A - Cabin supporting device for working vehicle - Google Patents

Abstract

PURPOSE: To eliminate restriction of vehicle weight when a viscous gas damper is used with a POPS cabin by providing a means restricting a shift of a cabin toward a vehicle body within the predetermined range. CONSTITUTION: As there is a gap between a safety pin 16 and a pin hole 17 of a cabin side bracket 7, a viscous gas damper 10 works in ordinary use such as in running or working of a wheel loader, and comfortableness is provided to an operator inside a cabin 2. If the wheel loader tumbles, a large load is applied to the viscous gas damper 10, and the viscous gas damper 10 is warped. In this process, even if the weight of the wheel loader is 15 tons or more, the safety pin 16 is brought into contact with the inside face of the pin hole 17 of the cabin side bracket 7, and a relative shift of the cabin 2 to the vehicle body is restricted within the predetermined range, so that the cabin 2 is prevented from intruding into the predetermined warp limitation area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabin support device for a work vehicle such as a wheel loader.

[0002]

2. Description of the Related Art For example, in a work vehicle such as a wheel loader, a ROPS (Roll-Over Protect) is used to protect an operator when the vehicle falls.
System: Operator protection system when the vehicle falls down) There are some with a cabin. In this cabin, in terms of safety strength,

[Equation 1] P = 6120 (M / 10000) ^1.2 kg M: It is required that the cabin does not enter the predetermined deflection limit region (DLV) when the maximum specified mass (kg) of the vehicle is applied. .

On the other hand, the cabin is provided on the vehicle body through a vibration isolating member, but in recent years, there is a strong demand for improvement in ride comfort of the operator, and as a vibration isolating member, use of a viscous damper having good riding comfort is required. ing. However, since the permissible load of the viscous damper is 10 tons or less per vehicle, when the ROPS cabin is mounted on the vehicle body via the viscous damper, the vehicle weight is 15 tons or less because of the above safety strength. There was a problem with being constrained.
It is an object of the present invention to provide a cabin support device for a work vehicle that can solve the above problems.

[0004]

In order to achieve the above object, a feature of the present invention resides in that a cabin is supported on a vehicle body through a vibration isolating member, and the cabin moves relative to the vehicle body. The point is that a limiting means for limiting the value within a predetermined range is provided. It should be noted that the vehicle body and the cabin are each provided with a bracket, a vibration isolating member is interposed between the brackets, and the limiting means is a safety pin that is inserted into both brackets. The diameter of the pin hole may be larger than that of the safety pin.

[0005]

The function of the vibration isolator is the same as that of the conventional work vehicle during normal use such as when the work vehicle is traveling or during work. When the work vehicle falls, a large load acts on the vibration isolating member and the vibration isolating member bends. However, the relative movement of the cabin with respect to the vehicle body is limited within a predetermined range by the limiting means.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a wheel loader will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a vehicle body exemplified by a frame, on which a ROPS cabin 2 is detachably supported. Has been done. Cabin 2 is 4
Each of the corners is mounted on the vehicle body 1 via the mounting device 3, and the structure of each mounting device 3 is the same, but here, the mounting device 3 on the rear side is shown in FIGS. It will be described based on 3. That is, the mount brackets 4 are erected on the left and right sides of the rear portion of the vehicle body 1, and the mount brackets 4 are
It has a pair of front and rear standing portions 5 which are plate-shaped.

On the other hand, a cabin side bracket 7 is provided from the rear of the cabin 2, and the cabin side bracket 7 is
It has a pair of front and rear plate-shaped lower parts 8 and a pair of plate-shaped left and right connecting parts 9 that connect the lower ends of the left and right side parts of these lower parts. The left and right side portions of the cabin side bracket 7 are arranged between the compatible mounting portions 5 of the mount brackets 4, and a viscous damper (mount rubber) 10 is interposed between the brackets 4 and 7. . The viscous damper 10 is exemplified as a vibration isolating member, is arranged between the compatible mounting portions 5 of the mount bracket 4, and is located below the connecting portion 9 of the cabin side bracket 7. The bottom plate 12 of the viscous damper 10 is fixed to the compatible mounting portion 5 of the mount bracket 4 by welding or the like. A mounting screw shaft 13 is projected upward from the center of the upper end of the viscous damper 10 to be inserted into the connecting portion 9 of the cabin side bracket 7, and a nut 14 is detachably fastened to the mounting screw shaft 13. The viscous damper 10 is detachably attached to the cabin side bracket 7.

Reference numeral 16 is a safety pin exemplified as a limiting means, which limits the relative movement of the cabin 2 with respect to the vehicle body 1 within a predetermined range, and applies the load shown in the above equation 1 to the cabin 2 from above and in the lateral direction. In this case, the cabin 2 is prevented from entering the predetermined bending limit area. The safety pin 16 is inserted in the front-rear direction through the compatible installation portion 5 of the mount bracket 4 and both lower installation portions 8 of the cabin side bracket 7. Although the safety pin 16 is fixed to the co-existing part 5, the safety pin 1 in each of the lower parts 8 is
The pin hole 17 through which 6 is inserted has a larger diameter than the safety pin 16. The attachment device 3 on the front side of the cabin 2 is arranged such that the safety pin 16 is in the left-right direction.

According to the above embodiment, the safety pin 1
6 and the pin hole 17 of the cabin side bracket 7, there is a gap, so that the viscous damper 10 acts during normal use such as when the wheel loader is running or working, and the cabin 2
The operator inside is comfortable to ride. In addition, when the wheel loader falls, a large load acts on the viscous damper 10 and the viscous damper 10 bends. At this time, even if the weight of the wheel loader is 15 tons or more, the safety pin 16 is attached to the pin hole 17 of the cabin side bracket 7.
By contacting the inner surface of the cabin 2, the relative movement of the cabin 2 with respect to the vehicle body 1 is limited within a predetermined range, and the cabin 2 is prevented from entering a predetermined bending limit region.

Although the vibrating member is a viscous damper (mount rubber) in the embodiment, the vibrating member may be other members. Further, in the embodiment, the limiting means is the safety pin, but other means may be used. Also, the safety pin was inserted into the bracket in the front-rear direction and the left-right direction, but in other lateral directions (horizontal direction),
It may be inserted in any other direction. Furthermore, although the embodiment applies the present invention to a wheel loader, the present invention can also be applied to a forklift and other work vehicles.

[0011]

As described in detail above, according to the present invention,
The movement of the cabin relative to the vehicle body can be limited within a predetermined range. Therefore, when the ROPS cabin is used as the cabin and a viscous damper or the like having a good riding comfort is used as the vibration isolating member, the constraint on the vehicle weight can be eliminated. According to the second aspect, it is possible to provide the safety pin that is the limiting means with a simple structure.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Car Body 2 ROPS Cabin 3 Mounting Device 4 Mount Bracket 7 Cabin Side Bracket 10 Viscous Damper (Vibration Isolation Member) 16 Safety Pin (Limiting Means) 17 Pin Hole

Claims (2)

[Claims] 1. A work vehicle in which a cabin is supported on a vehicle body via a vibration-proof member, and a limiting means for limiting a relative movement of the cabin with respect to the vehicle body within a predetermined range is provided. Cabin support device. 2. The vehicle body and the cabin are respectively provided with brackets, a vibration isolating member is interposed between these brackets, and the limiting means is a safety pin that is inserted into both brackets. The cabin support device for a work vehicle according to claim 1, wherein a pin hole through which the safety pin is inserted has a diameter larger than that of the safety pin.