JPS59179412A - Vehicle - Google Patents

Abstract

PURPOSE:To reduce weight and improve operability and workability, by mounting a combined chassis and carrier through four-link mechanisms having fulcrums and movable points and capable of vertically raising and lowering the chassis and carrier and hydraulic mechanisms to front and rear travelling axles for a conveying and working vehicle. CONSTITUTION:Four-link mechanisms are provided with fulcrums 12a mounted to a combined chassis and carrier I and movable points 11b mounted in right and left guide grooves 14 so as to be horizontally moved. Axles 4 are connected to lower ends 11a of the four-link mechanisms, and hydraulic cylinders 13 are mounted to the chassis and carrier. When the hydraulic cylinders 13 are expanded, the movable points 11b are moved in the guide grooves 14, and the four-link mechanisms are vertically elongated to vertically raise the chassis and carrier I. Conversely, the hydraulic cylinders 13 are contracted, the chassis and carrier I is lowered. With this structure, a suspension device on the axles may be eliminated, thereby reducing weight, and the chassis and carrier may be raised and lowered without forward and rearwar movements, thereby improving operability and workability.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to vehicles used for transportation and work.

Conventionally, vehicles used for both traveling transportation, lifting and lowering loading platforms, and tilting back and forth are generally divided into a chassis (2) and a loading platform (2), with front and rear running wheels (3), as shown in Figure 1. (
The axle (4) (j) of 3) is connected to the chassis (1) by means of a suspension (5) (5);
and the loading platform (2) are connected by a dogleg-shaped link mechanism (6) F.1. A vehicle that uses hydraulic cylinders (7) (7) to lift and lower the loading platform and tilt it back and forth, or as shown in Figures 2 and 3, the chassis (1) also serves as the loading platform and the front and rear running wheels (3)
Axle (4) of (3) (4) is a 1 that serves both suspension and lifting.
It is connected to the chassis by a point support link mechanism (8), and the chassis is raised, lowered, and tilted forward and backward using hydraulic cylinders (7). (The increased height makes it difficult to climb and work in a low position.) Furthermore, the overall weight of the vehicle also increases, which may cause it to violate weight restrictions when transported by other means of transportation. The latter has some disadvantages, but the latter compensates for the disadvantages of the former, but because of the one-point support link mechanism, when lifting or lowering a cargo platform that also serves as a chassis, the link and axle are centered around one point connected by a pin on the side of the chassis and cargo platform. Because the wheel rotates in an arc as shown by the dotted line (9) in Figure 3 (actually, the wheels do not move), the chassis and loading platform moves back and forth during lifting and lowering (t), and the height of lifting and lowering is also 1 Since the range (h) is determined by the length of the book link, the range (h) is small. Therefore, in vehicles where the front and rear ends of the chassis and cargo bed are important when in use, the operability is significantly reduced. However, it had drawbacks such as being unsuitable for use in high positions.

The present invention was proposed for the purpose of eliminating the above-mentioned drawbacks. 1. The axles of the front and rear running wheels can be lifted and lowered vertically to a large extent without any movement in the front and rear directions, and the load in the vertical and front and rear directions can be easily lifted and lowered. A four-link mechanism in the form of a parallelogram having a flexible fulcrum and a moving point, each side of which has the same length, a chassis-cum-carrying platform connected by the fulcrum and moving point of the link mechanism, and the chassis-cum-carrying platform. It is characterized by comprising a hydraulic cylinder that connects and adjusts the link mechanism, and a control device that operates the hydraulic cylinder.

Next, this will be explained with reference to the embodiment shown in the drawings (FIGS. 4 and 5).

In Fig. 4 (one-axis type each in the front and rear), there are two links (11
) and (11) are links whose lengths 11a to 11b) are the same, whose lower ends (11 &) are pivotally connected to the axle (4) of the wheel (3), and which are opened upward. The upper end (Nt+) (11'b) is a guide groove (14) (14) provided in the chassis and loading platform 0) as a moving point.
Each can be moved horizontally inside. and each of these links (11) (+ at the midpoint of January (12)
(12b), each link has a length equal to (11a to 1
The links (12) (12) of 2b) are pivotally connected, and the upper ends (12a) of the links (12) (12) are connected and pivoted to serve as seven support points (12a) and attached to the chassis/cargo platform (1). It has a four-link mechanism.

Therefore, the link mechanism has four sides (11) (11) (12)
Let (12) form a parallelogram of equal length.

The upper end of the hydraulic cylinder (13) d is connected to the chassis and loading platform, and the piston at the other end is connected to the axle (4), and by expanding and contracting the hydraulic cylinder, the upper end (Hb) of the link (11 (11)) is connected. 11b) is moved horizontally in the guide groove so that the chassis/cargo platform can be moved vertically up and down.

In addition, by simultaneously extending and contracting the hydraulic cylinders (13) in the front and rear, the chassis-cum-carrying platform can be raised and lowered at the same time, and by extending and contracting separately, the chassis-cum-carrying platform (1)
It is designed to be able to tilt forward and backward. Furthermore, an accumulator (not shown) is incorporated into the hydraulic circuit of the hydraulic cylinder (13) to serve as both a control device (15) and a suspension during driving.

Furthermore, in another embodiment (Fig. 5 front and rear multi-axis type),
The front and rear wheels attached to the chassis and loading platform (1) are each multi-axis type, and the two wheels, left, right and front, are connected by a connecting rod (10), and the first wheel is attached to the center of this connecting rod. As in the example, the lower end (11a) of the four-link mechanism is attached, and in this case, due to the multi-axis type,
The axle load is reduced, so transportability by other means of transportation is also improved.

Next, to explain its function (Fig. 6), a fulcrum (12a) is attached to the chassis/cargo platform (1), and moving points (11b) (11
b) Attach the parallelogram with the same length on each side, and the shape is 4.
The lower end (11a) of this link mechanism Ω is connected to the axle (4), and the piston of the hydraulic cylinder (13) is attached to the axle. Therefore, by extending the hydraulic cylinder, for example, the moving point (1lb ) (I Th) approach each other horizontally inside to lift the chassis/cargo platform (1) vertically, and by contracting the hydraulic cylinder (13), the moving points (11b) and (1jb) are moved to the outside. By determining the length of each relay in advance according to its lifting range (axis); vertically without kicking in the front and back direction The chassis and cargo platform can be lifted and lowered to a large degree, and the load can be easily divided into the vertical direction and the front-back direction.

The link length (12b to 11b) is the link (11a).
When changing the length without making it equal to the length (~12 yards), use a point between the palm and cargo platform as a fulcrum that can be lifted and lowered vertically to a large extent without any forward or backward movement, and where it is easy to shift the load in the forward or backward direction. By connecting four parallel-four link mechanisms with the same length on each side and providing a hydraulic cylinder for operation between the chassis and cargo platform and the link mechanisms, the axle of a conventional vehicle can be improved. By removing the upper suspension system, the weight of the vehicle can be reduced, and by operating a hydraulic cylinder, a four-link mechanism with one point as a fulcrum allows the chassis and cargo platform to be moved vertically and vertically without moving from side to side. The vehicle can be moved in any direction, improving the operability of the vehicle, and the height of the loading platform can be raised and lowered by a relatively large amount using a four-link mechanism, which has the effect of significantly improving workability.

[Brief explanation of drawings]

FIG. 1 is a side view of a lifting vehicle having a conventional suspension system, FIG. 2 is a side view of another embodiment having a conventional one-point support linkage, and FIG. 3 is a side view of a conventional one-point support linkage. FIG. 4 is a side view of the vehicle of the present invention, FIG. 5 is a side view of another embodiment, and FIG. 6' is a diagram explaining the function of the link mechanism of the present invention. (1)... Chassis/loading platform (3)... Wheels (
4)... Axle (11) (12) -... Link (1
1b) ...Movement point (12a) --Fully point (13
)...Hydraulic cylinder.

Claims (1)

[Claims] The axle of the front and rear running wheels can be lifted and lowered vertically without any movement in the front and rear directions, has a fulcrum and a moving point that can easily handle loads in the vertical and front and rear directions, and is parallel to the length between each side. A quadrilateral four-link mechanism, a chassis-cum-loading platform connected by a fulcrum and a moving point of the link mechanism, an oil cylinder for connecting and adjusting the chassis-cum-loading platform and the link mechanism, and an oil cylinder for operating the hydraulic cylinder. A vehicle characterized by a control device for controlling the vehicle.