JPH02106479A - Traveling device for transfer agricultural machine - Google Patents

Abstract

PURPOSE:To permit the optimum drive in the traveling on a road, field, or a bad road by installing the rear wheels having different diameter in the longitudinal direction and transmission-revolving said wheels at nearly equal peripheral speed, in a transfer agricultural machine in four-wheel drive form. CONSTITUTION:The right and left rear wheels 2 and 3 in pairs are arranged in the longitudinal direction in the rear part of a tractor car body 6 having a light truck form, and said rear wheels 2 and 3 are transmission-revolved through a differential transmission device 9, selection transmission device 10, high speed rear axle 4, and a low speed rear axle 5 by the power of an engine 7. The transmission case 11 of the selection transmission device 10 is installed in turnable ways around a differential shaft 13 for a rear axle housing 12, and the high speed rear axle 4 for the installation of the rear wheel 2 having a small diameter and the low speed rear axle 5 for the installation of the rear wheel 3 having a large diameter are bearing-supported outside. The transmission ratio between the high speed rear axle 4 and the low speed rear axle 5 by the selection transmission device 10 is set so that each peripheral speed of the rear wheels 2 and 3 is nearly equal and further equal to the peripheral speed of the rear wheel 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a traveling device for a mobile agricultural machine such as a truck-type tractor.

Problems to be Solved by the Prior Art and the Invention In mobile agricultural machinery, transport vehicles, etc. that travel in places where running conditions are not constant, such as in the field, it is difficult to overcome the problem of simply high speeds of the traveling transmission device that transmits and rotates the traveling wheels. Often difficult to adapt to.

(Invention of Claim 1) Means for Solving the Problem This invention provides a four-wheel drive type mobile agricultural machine that travels by transmission rotation of front wheels and rear axles (2) and (3).
The traveling device is constructed by installing rear axles (2) and (3) of different diameters and providing a high-speed rear axle (4) and a low-speed rear axle (5) which are transmitted and rotated at the same circumferential speed.

Functions and Effects of the Invention In a four-wheel drive type mobile agricultural machine, both the front wheel (1) and the rear axle (2) or (3) are transmitted and rotated, and the small-diameter rear wheel (21 is Attached to high-speed rear axle (4).

Also, the large diameter rear axle (3) is attached to the low speed rear axle (5),
It can be driven by power transmission. Which rear wheels (2), (
Even if 3) is attached and transmission rotation is performed, the circumferential speed remains the same.

Generally, a small-diameter rear wheel (2) is used when driving on the road, and a wide, large-diameter rear axle (3) is used when driving in a field or on a rough road.

In this way, compared to installing a small diameter rear axle (2), when installing a large diameter rear wheel (3), it is not only necessary to maintain driving force through deceleration transmission, but also to reduce slip in fields etc. It is possible to widen the adaptability to various driving conditions, such as by reducing vertical vibration. Moreover, since both rear axles T21 (3) are set at the same circumferential speed, the circumferential speed ratio due to the drive of the front wheels (1) does not change, making it possible to perform power transmission driving by four-wheel drive. can.

(Invention of Claim 2) Means for Solving the Problem This invention provides a four-wheel drive type mobile agricultural machine that travels by transmission rotation of front wheels (1) and rear axles (2) and (3). A high-speed rear axle (4) and a low-speed rear axle (5) are attached with rear wheels (2) and (3) of different speeds and rotate at approximately the same circumferential speed.
The traveling device is constructed by interlocking axle position switching for switching the ground contact position of the vehicle and the transmission to the high-speed rear axle (4) and the low-speed rear axle (5).

Functions and Effects of the Invention As described above, the small diameter rear axle (2) is connected to the high speed rear axle (4).
) and when attaching a large-diameter rear wheel (3) to a low-speed rear axle (5), the attached rear axle (2) or (3) must be in a position suitable for grounding and rotating. The positions of the axles (41 (51) are switched, and along with these switches, the transmission to each axle (41 (5)) is switched.
The high-speed rear axle (4) of the rear axle (2) or (3) on the side that rotates on the ground is transmitted at high speed, or the low-speed rear axle (5) is transmitted at low speed.

Therefore, these high speed rear axle (4) and low speed rear axle (5)
Since the axle position switching for changing the ground contact position with the rear axle and the transmission switching to the rear axle +41 (51) are performed in conjunction with each other, the rear axles (2) and (3) can be appropriately switched.

Example In addition, in the rotation, the tractor body in the form of a light truck (
6) has a pair of left and right front wheels (1) that can be freely steered by a steering handle, and is installed so that they are rotated by transmission from an engine (7) via a speed change transmission (8), etc.; The rear wheels (2) or (3) are connected from the variable speed transmission (8) to the differential transmission (9) or the switching transmission (
l [o, high-speed rear axle (4), and low-speed rear axle (5). (5) is the cockpit, +2
1 is a load loading platform, and 129+ is a tilling device connected to the rear end of the vehicle body (6), which can be switched between a tilling position in which the tilling claw Ol rotates while touching the ground, and a non-tilling position in which it rises from the ground.

The switching transmission device () at the rear of the vehicle body (6) is located on both left and right sides of the differential transmission device (9) on the rear axle housing α.
Transmission case (In is provided in the transmission case (111)
The rear axle housing (125) is equipped with a differential shaft (which is rotatable in the clockwise direction), and a high-speed rear axle (4) to which a small-diameter rear wheel (2) is attached to the outside, and a large-diameter rear wheel (3). The clutch gear (+49) receives the engagement of the clutch (141) from the differential shaft (In).
(+19, and these gears (+!;) It is configured so that it can be transmitted and rotated by the gear (171fl [I) that meshes with fIQ. When the clutch 041 is engaged with the clutch gear (+9), the small diameter rear axle (2) Transmitted, clutch α
When 4 is engaged with the clutch gear (IF5), the large diameter rear axle (
3) is transmitted. The transmission ratio between the high-speed rear axle (4) and the low-speed rear axle (5) by these switching transmission devices +I11 is as follows:
When the rear axles (2) and (3) are installed, the circumferential speeds of these rear wheels (2) and (3) are the same, and the circumferential speed of the front wheel (1) is also the same. It is set. tFJ
with the brakes.

This brakes the rotation of the pair of left and right differential shafts 01.

The transmission case of the rear axle (2) (3) is provided with a telescopic cylinder head that can be controlled to expand and contract by hydraulic pressure between it and the vehicle body (6), and when the telescopic cylinder head extends and contracts, the high-speed rear axle is activated. (4) is lowered and the low-speed rear axle (5) is rotated to a state where it is raised, and when it is shortened, the operation is controlled so that it is rotated to the opposite state. By expanding and contracting, the shifter (2δ) is connected via the wire (211), and this shifter (company) operates the clutch α.
4 are interlocked to switch and operate.

(2) is a suspension that receives the upper end of the telescopic cylinder +2 (1), and is installed at the rear end of the vehicle body (6).By extending the telescopic cylinder 4, the small diameter rear wheel (2) is switched to the ground contact position. , the clutch 04 is switched to the clutch gear (19 side) by the shifter (2),
The rear wheel (2) is then rotated by transmission.

In Fig. 4, a gear QIQ is provided at the tips of the left and right differential shafts (13), and this gear C241 is connected to the high-speed rear axle (
The gear 4) (■) and the gear OB of the low-speed rear axle (5) are always engaged.

The transmission case (10) is fixed at a predetermined position with respect to the rear axle housing aδ, and the high-speed rear axle (4) and the low-speed rear axle (5) are in the form of shaft cylinders with splines.
The wheel axle 4 to which the rear wheels (2), (3) can be attached can be replaced by the high-speed rear axle (4) and the low-speed rear axle (5) by spline fitting. I2S connects this wheel axle Q9 to the high-speed rear axle (4) or the low-speed rear axle (5).
) is a bolt that can be replaced and identified by tightening. By replacing the wheel axle (c) with a high-speed rear axle (4) and a low-speed rear axle (5), the wheel axle is switched to a small-diameter rear axle (2) and a large-diameter rear axle (3).

[Brief explanation of the drawing]

The figures show an embodiment of the invention, and Figure 1 is a side view;
FIG. 2 is a block diagram showing the transmission mechanism, FIG. 3 is a diagram of a part of the interlocking mechanism, and FIG. 4 is a plan cross-sectional view showing a part of another embodiment. In the figure, code (1) is the front wheel, +203) is the rear axle, and (4) is the rear axle.
) indicates a high-speed rear axle, and (5) indicates a low-speed rear axle.

Claims (1)

[Claims] 1. In a four-wheel drive type mobile agricultural machine that travels by transmission rotation of the front wheels (1) and rear wheels (2) and (3), the rear wheels (2) and (3) have different diameters. A traveling device comprising a high-speed rear axle (4) and a low-speed rear axle (5) that are installed and rotated at approximately the same circumferential speed. 2. In a four-wheel drive type mobile agricultural machine that travels by transmitting rotation of the front wheels (1) and rear wheels (2) and (3), the rear wheels (2) and (3) of different diameters are installed so that the rear wheels (2) and (3) have approximately the same circumference. Axle position switching that switches the grounding position of the high-speed rear axle (4) and the low-speed rear axle (5) that rotate at high speed, and each of these high-speed rear axles (4).
A traveling device that is configured to have an interlocking configuration with transmission switching to a low-speed rear axle (5).