JPS6231526A - Front-equipped farm working vehicle of four-wheel drive - Google Patents

Abstract

PURPOSE:To make a turning radius smaller and operatability better, by increas ing a steering wheel speed at the time of turning, and selecting a car drive system to the four-wheel drive. CONSTITUTION:Power of an engine 3 is transmitted to a transmission case 5 from a clutch housing 4 via a first transmission shaft 9, and further transmitted to front wheels 13, while it is also transmitted to a power takeoff shaft and a second transmission shaft 10. And, power of this second transmission shaft 10 is transmitted to rear wheels 15 from an intermediate case 8 via a rear-wheel transmission shaft 17. In addition, these rear wheels 15 are controlled for steering by steering operation of a steering wheel 27. And, in the intermediate case 8, there is provided with an overdrive gear, and a shift lever 47 is operated whereby these rear wheels 15 are speeded up.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a nine-wheel drive front-mounted working vehicle that can be equipped with a front-mounted working machine such as a mower or a snow blower at the front.

(Prior art) As this type of front-loading work vehicle, for example,
70604 and the drawings are publicly known. This conventional front-equipped work vehicle has a mower T-mounted at the front of the traveling vehicle body, and is front wheel driven, with the rear wheels serving as steering wheels.

In addition, as a four-wheel drive work vehicle, for example, the Utility Model 459-
The one described in Publication No. 136330 (Utility Model Application No. 58-60849) is publicly known. This conventional vehicle attempts to increase the speed of the front wheels when turning in order to reduce the turning radius.

(Problems to be Solved by the Invention) The working vehicle described in No. n, Utility Application No. 58-170604 is a front-wheel drive vehicle with the rear wheel used as a steering wheel, so it cannot be used for running on slopes, on slopes, or on slopes. It is unsuitable for work on leveling the ground, and there are problems with turning performance, especially on rough ground. Therefore, in order to solve these problems, it is possible to use four-wheel drive, but when using four-wheel drive with rear wheel steering, as mentioned above,
As described in 9-1363309, there is a problem that the turning radius does not become smaller even if the speed of the front wheels is increased. Therefore, it is conceivable to use four-wheel drive and front-wheel steering, but in the case of front-wheel steering, the front-mounted working machine will have to make a large turn, causing problems in workability.

Therefore, the present invention provides a four-wheel-drive muzzle-loading machine that allows the muzzle-loading machine to turn around in a small radius, minimizes its turning radius, and allows visual confirmation of the work status. Aiming to provide a vehicle (Means for solving problems) The features of the present invention aimed at achieving the above object are four-wheel drive, with the rear wheels serving as steering wheels. , a working machine can be attached to the front part, a speed increasing device is interposed in the transmission path of the rear wheels via a switching device to increase the circumferential speed of the rear wheels than the circumferential speed of the front wheels, and
The driver's seat is located at a position where the front-mounted working machine can be seen (Embodiment) In the following, an embodiment of the present invention will be described in detail based on all the drawings in Figures 1 and 2. (1) is a four-wheel-drive front-mounted work vehicle, and a mower 1 (2) is mounted on the front part of the work 1 [fl+ with a suspension so that it can be raised and lowered freely.

Said work vehicle! 11 has an engine (3) at the rear, and a clutch clutch (4) is stratified at the front of the engine +31. Clutch-hauling (Mission case (51 is placed in front of 41 at a predetermined spatial sound,
The mission case (51 and clutch hacking (4)
is rigidly connected to the frame (61) to make up the entire body (7) of the work vehicle Il+.Clutch removal (41) and transmission case (6) are combined in the space of 1 case + 8.
Is there a 1? L The intermediate case (8) is connected to the frame (6).
) is fixed at n.

The clutch hacking (4) and the mission case (5)
1 is the first story! #F is connected to axis t91, and mission case (51) and intermediate case [8J are connected to F, respectively, to the second transmission shaft (lO).Mission case (9 to 7 of 51)
The u PTo axis (11) protrudes from the MN plane.

A front axle 021 extends from both left and right sides of the IF 5 section of the mission case (5), and a front axle 021 is attached to the tip of the front axle 021. A rear axle 041 is installed horizontally below the engine (31), There are several layers of rear wheels on both ends.The front wheels are also smaller in diameter than the rear wheels.

The power of the 1i71&u engine j31 is transmitted from the clutch hatching (4) to the transmission case (51) via the first transmission shaft (9), and is transmitted to the front wheels a4 via the front wheel differential device US+, as well as to the transmission case (51). It is also transmitted to the PTO shaft (W!I2 transmission shaft (lO)) via the transmission wJitit in 51.The power of W!j2 transmission shaft (101 is transmitted from the intermediate case (8) to the rear wheel.

The power is transmitted to the rear wheels via the transmission shaft (17) and the rear wheel differential device +181.

10,000, the power of the PTO shaft (II) is the universal joint shaft (191
Mo 1 (2) power receiving device through! (4), cutter 121H of mo 1 (2)! Rotationally drive υ(21).

This Mo1(2) is fl:1i! Car body (7) of car (1)
It is pivoted to the front part of the support arm (2) and attached to the next support arm (2). A lift arm threshold that can be moved up and down by a hydraulic cylinder is pivotally attached to the front part of the vehicle body (71).
A mower 1 (21) is supported on the toe arm via a metal chain.

If you place it in a position where you can visually see the above Mo 1 (2)! , a work vehicle + 11 transport seats are provided. That is, the driver's seat - is provided as close to the front of the work vehicle fi+ as possible. A steering wheel is provided in front of this driver's seat (A). The rear wheel c15) is configured to be steered by the steering operation of the steering handle.

Now, the intermediate case (81) is provided with the speed increasing device 28 shown in FIGS.
81 is the input shaft box, WI11 intermediate shaft ■, second intermediate shaft '3
11 and the output shaft 3z are arranged in this order downward from the upper blade and are arranged parallel to each other.

The input wheelbase is connected to the second transmission shaft f101, and the output shaft 32
1 is connected to the rear wheel transmission shaft 11.71.

A first gear ω is fixed to the input shaft box, and a second gear system meshing with the first gear is fixed to the first intermediate shaft end. A third gear c+@ is fixed to the edge of the first intermediate shaft, and a fourth gear example that meshes with the sixth gear of the second intermediate shaft 13111c is fixed. Furthermore, W! is applied to the second intermediate shaft 3u! I5 gear I3η
is fixed. The output shaft 3 has a 6.7th gear 138113 that is always engaged with the W54 and the 5th gear.
9] is freely rotatable. A shifter 4 forming a switching device between the 6th gear and the 7th gear is fitted so as to be movable in the axial direction and rotatable integrally with the output shaft 3z. 6.7th gear 13al t391 A pawl clutch 1411 is provided on the opposing surface of the shifter, and pawls 4z that releasably engage with the pawl clutch 411 are provided on both sides of the shifter.

The shifter 1401 is moved in the axial direction by a shift 7 oak (43) as shown in FIG. 43 is the shift lever (
It is moved in the axial direction by the individual. This shift lever (4υ
are arranged in several layers around the lever shaft so that they can swing freely. This lever shaft 14F5 is provided on the side of the driver's seat and is rotatably operated via an interlocking means (not shown) by operating the shift bar. The seaweed moves forward, and the 5th gear 3 power and the 6th gear engage full output shaft 3
1, the peripheral speeds of rear wheel 05 and front wheel α4 are the same.

On the other hand, the shifter moves backwards and shifts between the 4th gear train and the 7th gear train.
gear! When transmitting the engagement of 39) to the output shaft 3z, the circumferential speed of the rear wheel 051 is made higher than the circumferential speed of the front wheel.

When the shifter 140) is in the middle position between the 6th gear t3& and the 7th gear, it is neutral, and the output shaft +32 has the engine:
According to the above-described embodiment of the present invention, when performing a turning operation, the shifter 40 is moved backward by t'' by operating the speed change lever (4η) to increase the speed of the rear wheels (+5). In this way, even if the rear wheels 115), which are steering wheels, are accelerated at T/b, their turning radius becomes smaller than when the speed is not increased.

Note that the present invention is not limited to the above embodiments,
=+1 rF: The industrial machine may be, for example, a snow blower, a chart, an earth removal machine, etc. The switching device for changing the shifter speed-up device 281 is not limited to one in which the shifter is operated with the hand J, but may be one in which the cloth is cut in conjunction with the operation of the handle 271.

Note that the reference numeral 4& in Fig. 1.2 indicates a grass collecting bag.

(Effects of the Invention) According to the present invention, since the steering wheel speed is fully increased during a turn and the four-wheel drive wJT is performed, it is possible to turn on grass, etc. without damage.
Additionally, the turning radius can be made smaller, resulting in better workability. Furthermore, since it is possible to make small turns while checking the condition of the work machine from the seat, it is possible to work efficiently.

[Brief explanation of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 6 is a sectional IfI diagram of the intermediate case, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 6, and FIG. The figure is v-41tA in Figure 4.
FIG. fi+...work vehicle, +21...Mower (fuso work machine), glance...front wheel, Su5)...rear wheel, area...driving seedlings, haste...speed increaser, seagull ...Shifter (part of the switching device).

Claims (1)

[Claims] 1. With four-wheel drive, the rear wheels are used as steering wheels, a work machine can be attached to the front, and the peripheral speed of the rear wheels is set higher than the peripheral speed of the front wheels through a switching device in the transmission path of the rear wheels. A speed increasing device is interposed to
A four-wheel drive front-loading work vehicle characterized in that a driver's seat is provided in a position where the front-loading work machine can be visually seen.