JPH0520591Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a traveling device for a passenger work vehicle suitable for traveling on snow or the like.

(Prior art and its problems) A passenger work vehicle equipped with two front wheels and two rear wheels and used for agricultural work etc. by driving the rear two wheels or four wheels was put into practical use in Utility Application No. 1692, etc. It is served to.

When working on snow with the above-mentioned work vehicle, it is difficult to drive even if it is equipped with ultra-low pressure tires with high grip, and especially when trying to drive on soft snow such as fresh snow, the tires may If the vehicle is buried in the vehicle, it is difficult to obtain driving force, and the running performance is significantly reduced, and this is true not only for rear two-wheel drive vehicles but also for four-wheel drive vehicles.

The present invention has been developed to solve the above-mentioned problems, and its purpose is to use a passenger work vehicle that has four wheels and drives at least two rear wheels, and is intended to be used on soft roads such as on snow. certain,
The objective is to make the vehicle run smoothly, improve running ability, and perform the intended work, and to achieve the above with a simple configuration.

(Means for solving the problem) A means for solving the above problem is to removably connect a work machine equipped with two left and right wheels to the rear of the work vehicle, and to connect the work machine to the rear of the work vehicle. The left and right wheels and the left and right driving rear wheels of the riding vehicle are connected by a removable transmission mechanism disposed outside the wheels.

(Effect of the above means) According to the above means, the vehicle becomes a six-wheeled vehicle including the wheels of the work equipment, the rear four wheels including the wheels of the work equipment are driven, and the wheels of the work equipment also move on the snow surface due to the weight of the work equipment. Since it is driven by the rear four wheels, it provides driving force even on soft roads, and improves drivability on snow and other surfaces. The construction is simple, as the work equipment is connected to the vehicle and the transmission mechanism is removably installed between the rear wheels of the vehicle and the wheels on the same side of the work equipment, and can be installed as needed to drive rear four-wheel drive. A work vehicle can be constructed.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an external side view of a work vehicle equipped with a traveling device according to the present invention, and FIG. 2 is a plan view of the same.
An engine 3 is mounted on the front part of the vehicle body 2, a seat 4 is provided at the rear part, and a steering handle 5 is provided at the rear of the engine 3. The engine 3 is covered with a front cover 6 that forms a bonnet, and behind this is a seat 4.
8 in the figure.
9 is a gear shift lever arranged on one side of the seat 4; 9 is a rear hitch which is swung by a hydraulic system 10 via a link 11; and 12 is a similar hydraulic system 13.
shows the front hitch which is swung through the link 14.

The output shaft 15 of the engine 3 is connected to a propulsion shaft 16 that passes under the floor 7, and is configured to be input to a transmission 17 disposed below the seat 4 via the propulsion shaft 16. A drive shaft 19 extends left and right from a reduction case 18 provided in the
The left and right rear wheels 20, 20 are tied to this. A differential device is provided in the reduction case 18,
The configuration is such that the left and right rear wheels 20, 20 can be differentially operated. In the embodiment, the propulsion shaft 21 extends forward from the lower part of the transmission 17 via the output shaft, and the engine 3
The shaft 2 is placed in a reduction case 22 arranged under the
1, and left and right front wheels 24, 24 were connected to a drive shaft 23 extending left and right from a reduction case 22, so that in this embodiment, a four-wheel drive vehicle with front and rear wheels was driven.

A work machine 30 is connected to the rear of the vehicle 1 described above, and the work machine is a snow melting agent sprayer in the embodiment.
is equipped with a hopper 31 on the top for storing the snow melting agent, the hopper 31 is supported by a frame 32 below, the frame 32 is detachably connected to the hitch 9 described above, and the output shaft 25 on the hitch side supplies the power of the spreader. get. An axle 33 is horizontally fixed to the lower part of the frame 32 of the spreader 30, and wheels 34, 34 are rotatably supported at both ends of the axle. It is rotatably supported via a bearing 35.

An axle 33 is attached to the outer surface of the hub 36 of the wheel 34 described above.
A polygonal, for example, hexagonal engagement recess 37 is formed coaxially with the wheels 34, which opens outward and extends inward in the axial direction. On each outer surface of the rear wheels 20, 20 of the vehicle 1, there is a hexagonal engagement recess 26 that is coaxial with the axle 19, opens outward, and extends axially inward.
In the embodiment, the engagement recess 26 is integrally formed at the shaft end of the drive shaft 19.

The transmission mechanism 40 is removably installed between the drive shaft 19 of the vehicle 1 and the wheels 34 of the spreader 30 on the same side, thereby connecting the two.

The transmission mechanism 40 is provided in a case 41, and the case 41 has a box shape that is long in the front and back direction, and a driven sprocket 43 is disposed inside the front side of the case 41 via an input shaft 42 that extends across this part of the case. The shaft 42 is rotatably supported via bearings 44, 44 fixed to the left and right inner surfaces of this part of the case 41, and the shaft 42 extends outward from the inner surface of the case 41. A hexagonal engaging portion 4 is provided at the shaft end.
2a is formed, and the recess 2 at the shaft end of the drive shaft 19 described above is formed.
6, and the cross pin 45 prevents the shaft engaging portion 42a from coming out of the engaging recess 26.

On the other hand, an output shaft 47 is rotatably horizontally mounted inside the rear side of the case 41 via a bearing 46, and a drive sprocket 48 is fixedly installed on the shaft 47.
A hexagonal engaging portion 47a is formed at the shaft end by extending outward from the inner surface of the cover in the same direction as the spreader 3.
A chain 50 is fitted into the engagement recess 37 formed on the outer surface of the hub 36 of the wheel 34 of No. wind it.

Similarly, a transmission mechanism 40 is used to connect the rear wheel on the other side and the wheel of the spreader.

The wheels 24, 20 on the vehicle side and the wheels 34 of the spreader are all made of ultra-low pressure tires with high grip strength.

In the embodiment described above, both the front and rear wheels constitute driving wheels, and the driving force of the rear wheel 20 is transmitted from the driving axle 19 to the input shaft 42 of the transmission mechanism 40 to rotate the sprocket 43. This power is transmitted to the sprocket 48 via the chain 50, and the output shaft 47
The signal is transmitted to the wheels 34 of the spreader 30 via the rear wheels 20, and the wheels 34 are driven in synchronization with the rear wheels 20. Therefore, the rear wheels 20 of the work vehicle and the spreader 30
The wheels 34 are driven on the same side, so that the rear four-wheel drive becomes a six-wheel drive working vehicle in combination with the front wheels. The weight of the vehicle 1 is applied to the rear wheels 20,
On the other hand, the weight of the spreader 30 is applied to the wheels 34,
Therefore, along with the drive of each wheel, the grip force and driving force on the snow surface are improved, the drivability is improved, the vehicle can run reliably, and the snow melting agent can be spread smoothly. Ru. By the way, the rear wheels of the vehicle and the wheels of the spreader are connected on the same side, and are driven synchronously on the same side, but even if the two wheels on one side slip or lock, the differential mechanism allows the left and right transmission mechanisms to The wheels are differential, so it's not a problem.

In the above embodiments, a six-wheel drive system was used that also drives the front wheels, but the front wheels can also function as steering wheels only, and the transmission mechanism is a chain and sprocket, but other mechanisms, such as a shaft that combines a bevel gear and a propulsion shaft, can also be used. A drive type may also be used, but in this case the structure would be complicated, so the embodiment would be the simplest. Further, in the embodiment, the sprocket shaft and the wheel side shaft are connected by a hexagonal concave engagement, but the present invention is not limited to this. Further, in the embodiment, the working machine is a snow melting agent sprayer, but the working machine can be any arbitrary machine, such as a cart for transporting loads or the like.

(Effect of the invention) As is clear from the above, according to the invention, the drive rear wheel and the wheels of the work machine are connected by a transmission mechanism, and the wheels of the work machine are also driven. This means that even under conditions where the grip and driving force are reduced, such as on snowy surfaces, the overall driving force and gripping force are improved, and the running performance is improved, making it possible to work on snow without any trouble. You can make it happen. Depending on the situation, i.e., depending on conditions such as snow surface, the wheels of the work machine may be used as rolling wheels, and if necessary, the transmission case may be placed between the rear wheels and the outer surface of the work machine wheels. It only needs to be installed with a recessed engagement, and rear four-wheel drive can be achieved simply, quickly, and extremely easily, and the structure also includes an engaging recess at the end of the axle.
Since engaging protrusions are provided on the input and output shafts of the transmission mechanism, and it is composed of a sprocket and a chain, the structure is simple and power transmission is ensured.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a cross-sectional plan view of the transmission mechanism, and Fig. 4 is a diagram showing the connection between the transmission mechanism and the rear wheels of the vehicle. FIG. 3 is an exploded perspective view showing an engagement relationship. In the drawing, 1 is a work vehicle, 19 is a drive axle, and 2
0 is the rear wheel, 30 is the work machine, 34 is the wheel of this, 2
6 and 37 are engaging parts, 40 is a transmission mechanism, 41 is a case, 43 and 48 are sprockets, 42 and 47 are shafts thereof, and 50 is a chain.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A passenger work vehicle with at least two rear wheels as drive wheels, in which a work machine having two left and right wheels is removably connected to the rear of the work vehicle, and the work machine A traveling device for a passenger work vehicle, characterized in that the left and right wheels of the passenger work vehicle are connected to the left and right drive rear wheels of the passenger work vehicle by a removable transmission mechanism disposed outside the wheels. 2. The transmission mechanism consists of driving and driven sprockets and a chain wound around the sprockets, and the shafts of each sprocket are detachably connected to the shaft ends of the drive rear wheels of the passenger work vehicle and the left and right wheels of the working machine. Claim 1 of the above-mentioned utility model registration claim 1, wherein the sprocket, its shaft, and chain are covered with a case to constitute a removable transmission case.
Traveling equipment for riding work vehicles in Section 1.