JPH11139177A - Height adjustable high floor type truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a wheel height of a high floor type truck whose carriage frame lower side is opened. SOLUTION: In a high floor type truck, wheels are installed in the both side ends of a bed frame 10 with the lower side of the bed frame 10 opened, and for running the truck, a driving wheel 12 among the wheels is driven by means of a transmission shaft 34 arranged in the bed frame 10 lower both side ends and forcibly driven. In this high floor type truck, a driving shaft 40, to which power is transmitted from the transmission shaft 34, is arranged rotationally in the vertical face to the transmission shaft 34, while the driving wheel 12 is installed to the driving shaft 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-floor type transport vehicle capable of adjusting the height of a vehicle traveling over a ridge or the like in a field.

[0002]

2. Description of the Related Art A raised-floor carrier having wheels running across a ridge used for harvesting crops grown in a field is known. In such a transport vehicle, not only the height (vehicle height) of the carrier frame is high, but also a large loading space can be secured above the carrier frame, and the lower portion does not interfere with ridges or the like. It is widely open. For this reason, the engine, the transmission and the like are installed on one side of the vehicle body, and the wheels are also provided on both lower ends of the carrier frame. Of course, the axle connecting the wheels on both sides is also set at a high position below the carrier frame.

[0003]

Since the width of the ridges and the like differ depending on the type and region of the crop, the width (vehicle width) of the carrier frame can be adjusted to be wide or narrow. That is,
The horizontal members and axle of the carrier frame are designed to be able to expand and contract from side to side. However, the vehicle height could not be changed. For this reason, a sufficient height has been secured in advance to provide a margin.

[0004] However, if the height of the vehicle remains high when the ridges and obstacles are low, there is a drawback that running performance is reduced and workability is deteriorated. It is also a problem when traveling on the road. The present invention has been made to solve such a problem, and, in short, is to make it possible to easily change the vehicle height with a simple adjustment.

[0005]

SUMMARY OF THE INVENTION Under the above-mentioned problems, according to the present invention, wheels are attached to both side ends of a lower portion of a carrier frame in a state where the lower portion of the carrier frame is opened, and drive wheels of the wheels are provided at both lower ends of the carrier frame. In a high-floor type transport vehicle that travels by driving with a driven shaft that is forcibly driven, a drive shaft and a drive shaft that is power-transmitted are provided rotatably in a plane perpendicular to the transmission shaft, and drive wheels are provided on the drive shaft. The present invention provides a high-floor type transport vehicle capable of adjusting the vehicle height, which is mounted.

[0006] By taking the above measures, if the drive shaft is rotated and fixed at a predetermined angle around the transmission shaft, the ground height of the drive wheels changes, and the vehicle height can be adjusted. This adjustment operation can be performed simply by rotating the drive shaft. In this case, the drive shaft and the drive wheels are generally provided inside the transmission shaft. This is because the loading frame can secure a wide loading space when traveling in the furrow.

Further, according to the present invention, in the above-mentioned high-floor type transport vehicle, an idler wheel is provided on both lower ends of a carrier frame in addition to a driving wheel, and the idler wheel is supported so as to be able to move vertically and rotatably with respect to the carrier frame. Provided by the holder. By this means, the idler wheel rotates with the turning of the vehicle body, and the turning performance is improved, and the floating wheel can be adjusted up and down so as to match the height of the driving wheel.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a stilt-type transport vehicle showing an example of the present invention, and FIG. 2 is a front view thereof. This stilt-type transport vehicle is provided with wheels below a carrier frame 10 and at both ends thereof. In the present embodiment, the wheels include a pair of left and right drive wheels 12 and idler wheels 14.

In this case, the carrier frame 10 is formed by arranging a vertical member 16a and a horizontal member 16b in a lattice shape, and a handle 18 is continuously provided at a rear portion. In addition, a wide loading space is secured by not disposing the devices and the like on the upper surface of the loading frame 10. The drive wheel 12 is forcibly driven, is composed of two right and left wheels, and is installed on the front side below the carrier frame 10. Idler 14
Also, two wheels are deployed on the left and right, and installed on the rear side.

An engine 20 and a transmission 22 are suspended from the rear to the front on one side below the loading frame 10, and a belt-pulley mechanism 24 is provided between the two 20 and 22.
And a tension clutch mechanism 26. Power is transmitted from an output shaft 28 of the transmission 22 to a first transmission shaft 30 provided directly below the carrier frame 10 by a chain / sprocket mechanism 32, and further transmitted to a transmission shaft 34 provided at a lower portion closer to the front by a chain / sprocket mechanism. 36
The power is transmitted by.

The first transmission shaft 30, the transmission shaft 34, and the chain / sprocket mechanisms 32, 36 connecting them are covered with a chain case 38. Also, the first transmission shaft 30
Is extended to the other side, and the same configuration as described above is provided on this side. That is, the power structure below the first transmission shaft 30 is provided as a pair of left and right power units.

As described above, the engine 20 and the mission 2
The reason why 2 is unevenly distributed on one side and the first transmission shaft 30 is also set at a high position is to open the lower part of the carrier frame 10 and smoothly even if there is a ridge or an obstacle below the lower part. This is to make it possible to run.

Next, in the present invention, the drive shaft 40 for power transmission with the transmission shaft 34 is provided so as to be rotatable in a plane perpendicular to the transmission shaft 34. FIG. 3 is a side view of the main part showing this state. The chain case 42 for housing the drive shaft 40 is provided rotatably with respect to the chain case 38 for housing the transmission shaft 34. The chain case 42 is disposed inside the chain case 38, and the drive shaft 40 is
2, and the drive wheel 12 is attached to the protruding portion. In this case, the smaller the amount of inward protrusion of the chain case 42 and the drive wheels 40 is, the more compact the whole is, the more preferable.

FIG. 4 is a cross-sectional view showing these structures. The transmission shaft 34 extends to the chain case 42 side, and a chain sprocket mechanism 44
And the chain case 42 is joined to a flange 46 provided on the chain case 38 so as to be rotatable around the transmission shaft 34.

The rotation of the chain case 42 with respect to the flange 46 must be fixed at an arbitrary position. For this reason,
The two 42, 46 are connected by bolts and nuts 48. To facilitate this operation, an arc-shaped long hole 50 centered on the transmission shaft 34 is formed in the flange 46, and this protrudes from the chain case 42. Bolt 48 to pass through.

As described above, by rotating the chain case 42, the ground height of the drive wheels 12 can be changed arbitrarily. However, it is preferable that the ground height of the idler wheels 14 can be changed accordingly. FIG. 5 is a cross-sectional view showing the support of the idler wheel 14. The outer cylinder 54 is inserted into a holder (fork cylinder) 52 that holds the idler wheel 14, and the outer cylinder 54 is fixed to the carrier frame 10. It is fitted into the cylinder 56.

In this case, the fork cylinder 52 can slide up and down with respect to the outer cylinder 54. Then, concave portions 58 are formed on the outer periphery of the fork cylinder 52 at appropriate intervals,
Positioning is performed by inserting a bolt 60 passing through the outer cylinder 54 into the housing. As described above, by changing the height of the fork cylinder 52 with respect to the outer cylinder 54,
The height of the ground can also be changed.

On the other hand, the outer cylinder 54 is rotatably fitted into the fixed cylinder 56. This is to improve steering performance. In addition, the vertical movement of the outer cylinder 54 with respect to the fixed cylinder 56 must be restricted. Therefore, in this example, a stepped shape and the stop ring 62 and the like make this possible, but this is only an example. Absent.

When the vehicle is going straight, the idler wheel 1
If the wheel 4 turns freely, it will meander and the running performance will be poor. For this reason, when the bolt 64 or the like is set on the fixed cylinder 56 and the outer cylinder 54 is tightened with this, the turning of the outer cylinder 54 is locked. Note that the locked position is generally a position where the idler wheel 14 is directed in the straight traveling direction.

This high-floor type transport vehicle has a variable width as in the prior art. That is, the first transmission shaft 30 and the lateral member 16b are each formed as a double cylinder so as to be able to expand and contract left and right. This is to accommodate various widths of ridges and obstacles.

[0021]

As described above, according to the present invention, the height of the vehicle can be adjusted, so that even if the height of the ridges and obstacles is different, the height can be set to the optimum height accordingly. Therefore, running performance,
Does not hinder workability. In particular, when traveling on a road, traveling becomes unstable if the vehicle height is unnecessarily high. However, if the vehicle height can be reduced in this way, stable traveling can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view of a stilt type vehicle showing an example of the present invention.

FIG. 2 is a front view of a stilt-type carrier showing an example of the present invention.

FIG. 3 is a partial side view of a drive wheel showing an example of the present invention.

FIG. 4 is a cross-sectional view of power transmission to drive wheels showing an example of the present invention.

FIG. 5 is a sectional view of an idler wheel support showing an example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 10 carrier frame 12 drive wheel 14 idle wheel 34 transmission shaft 40 drive shaft 52 holder

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B62B 3/02 B62B 3/00 E

Claims (4)

[Claims] 1. A raised floor type in which wheels are attached to both side ends of a lower part of a loading frame in an open state, and driving wheels of the wheels are driven by forcibly driven transmission shafts provided on both lower ends of the loading frame. In a transport vehicle, a transmission shaft and a drive shaft for power transmission are provided so as to be rotatable in a vertical plane with respect to the transmission shaft, and drive wheels are attached to the drive shaft. Haul truck. 2. The vehicle according to claim 1, wherein the drive shaft and the drive wheels are provided inside the transmission shaft. 3. The vehicle according to claim 1, wherein idler wheels are provided on both lower ends of the carrier frame in addition to the drive wheels, and the idler wheels are held by holders supported vertically and rotatably with respect to the carrier frame. Height-adjustable truck with adjustable vehicle height as described. 4. The high-floor carrier according to claim 1, wherein the width of the carrier frame can be adjusted.