JPS638544Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an agricultural transport vehicle equipped with front and rear wheels, a driving section, and a loading platform.

For agricultural transport vehicles, it is desirable to have as high a minimum ground clearance as possible to reduce the chance of the oil pan, differential case, etc. hitting convexities on the ground when driving in fields or over uneven terrain such as over ridges. However, when the minimum ground clearance is increased in this way, the height of the loading platform above the ground also increases, making it difficult to load and unload cargo onto the loading platform.

In view of the above-mentioned circumstances, the present invention has an object to increase the minimum ground clearance while making loading and unloading easier.

The characteristic configuration of the agricultural transport vehicle of this invention is as follows:
In an agricultural transport vehicle having front and rear wheels, a driver's section, and a bed, the wheel closest to the loading and unloading section of the bed is attached to the mounting frame of the bed via a parallel link mechanism that supports the wheel diagonally upward toward the other wheel so that it can be freely moved and fixed. This characteristic configuration provides the following effects:

According to this feature of the present invention, by positioning the wheels downward, the minimum ground clearance can be increased and the rough terrain running performance can be improved. Furthermore, by positioning the wheels upward, the entire vehicle body can be tilted to the ground, and the height of the loading/unloading section of the platform can be lowered above the ground, thereby making it easier to load and unload cargo onto the platform. In addition, since the wheel is moved upward and closer to the other wheel in an inclined direction, for example, when the wheel is moved directly upward or in an inclined direction closer to the loading/unloading area, the As a result, the amount by which the loading and unloading section descends as the wheels move upward can be increased.
When the amount of upward displacement is the same, the loading and unloading section can be positioned lower to improve loading and unloading work efficiency, and when the lowering position of the loading and unloading section is the same, the amount of upward displacement of the wheels can be reduced. As a result, the parallel link mechanism provided between the wheels and the loading platform can be constructed in a compact state that is advantageous for equipment.

Hereinafter, embodiments of the present invention will be described based on the drawings.

A front body frame 5 equipped with a pair of left and right drive wheels 1, 1, a driver's seat 2, a prime mover 3, and a steering handle 4, a pair of left and right drive wheels 6, 6, and a dump type vehicle that can load and unload from the rear of the vehicle body. Loading platform 7
The loading platform mounting frame 8 is pivotally connected to the loading platform frame 8 so as to be swingable left and right around the vertical axis a, and between the frames 5 and 8, the frames 5 and 8 are connected in conjunction with the steering handle 4. In an agricultural transport vehicle equipped with a hydraulic cylinder 9 that swings left and right, the wheels located near the loading/unloading part 7a of the loading platform 7, that is, the rear wheels 6, are tilted upward and forward. suspension 6A,
A parallel link mechanism 10 is provided that changes and fixes the position of each 6A.

The driving device 3 includes a frame 3A that is elastically supported by the front body frame 5 via a spring 11.
It consists of an engine 3B, a clutch 3C, and a transmission case 3D attached to it.

Suspensions 6A, 6A of the rear wheels 6, 6
and front wheels 1, 1 suspension 1A, 1A
are respectively provided with leaf springs 6a, 1a, . . . and shock absorbers 6b, 1b, .

The parallel link mechanism 10 is a left and right parallel link that supports the suspension 6A, more specifically, the mounting frames 6c, 6c of the leaf springs 6a, 6a, and the shock absorbers 6b, 6b, with respect to the cargo platform mounting frame 8, so as to be able to change their positions. 10A, 10A and a shaft 10a that interlocks these left and right parallel links 10A, 10A.
By rotating and fixing the hydraulic cylinder 10B, both parallel links 10A and 10A can be integrally swung and fixed.

The differential case 12 for the front wheels 1, 1 is
It is attached to the prime mover frame 3A.

Reference numeral 13 denotes a transmission shaft suspended between the transmission case 3D and the rear wheel differential case 14, which is configured to be extendable and retractable, and is equipped with universal joints 15, 15 at both ends thereof.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view, Fig. 2 is a schematic side view of the wheel in the raised state, Fig. 3 is a longitudinal sectional front view of the main part,
FIG. 4 is a sectional view taken along the - line in FIG. 1. 1, 6... Wheels, 7... Loading platform, 10... Parallel link mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In an agricultural transport vehicle equipped with front and rear wheels 1, 6, a driving section, and a loading platform 7, of the wheels 1, 6, a portion near the loading/unloading section 7a of the loading platform 7 A parallel link mechanism 10 that supports one wheel 6 in a diagonally upward direction approaching the other wheel 1 so that the position thereof can be changed and fixed.
An agricultural transport vehicle characterized in that it is attached to the mounting frame 8 of the loading platform 7 via. 2. The agricultural transport vehicle according to claim 1, wherein the parallel link mechanism 10 changes the position of the wheels 6 along with their suspensions 6A.