JPH02296590A - Small snowmobile - Google Patents

Abstract

PURPOSE:To ensure an easy escape from a stack by providing an auxiliary drive machine in a track belt drive system at the lower part of a rear body via a freely connectable coupling, and providing a body front with switching means for controlling the auxiliary drive machine. CONSTITUTION:A small snowmobile 1 is equipped with a steering ski 3 forward under a body 2, and a track belt 4a aft under the body 2. The track belt 4a is extended between a driving wheel 4b and a driven wheel 4c, and the driving wheel 4b is rotated with a track belt drive system including an engine installed on the forward upper part of the body, thereby actuating the track belt 4a. In this case, an auxiliary drive machine 13 comprising a planetary gear reducer 13a and a motor 13b is fitted to the end of the axis of the driving wheel 4b via a coupling 14. Also, a grip member 3b is provided at the front of the skiing plate 3a of the ski 3, and switching means 20 and 30 for advance and retreat motion are provided on the rear surface 3c of the grip member 3b for controlling the motor 13b.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in small snowmobiles.

(Prior Art) So-called snowmobiles, which are equipped with one or two wooden steering skis at the front and a cabitage-like driving track belt at the rear and run on snow, are becoming popular for transportation, transportation, and leisure purposes. .

These snowmobiles are called small snowmobiles to distinguish them from large snowmobiles such as bulldozers, and because they are lightweight and small, they differ from large snowmobiles in terms of equipment (Utility Model No. 53-1).
2115).

(Problems to be Solved by the Invention) The above-mentioned small snowmobile is designed to prevent it from sinking into the snow by increasing the width of the track belt and reducing the ground pressure.

However, when driving on fresh or soft snow, the track belt may become buried deep in the snow, making it impossible to move forward. This state is called a stuck state (Fig. 9(a)), and conventionally, the attempt was made to manually lift the rear part 101 of the vehicle body (Fig. 9(b)) and move it laterally (Fig. 9(C)) to escape from the stuck state. Ta.

The small snowmobile 100 has a dead weight of 150 to 8 to 250 kg, and the work of escaping the stack is not easy, and the burden on the occupants is extremely heavy in snowy fields or mountains where it is difficult to obtain assistance.

(Means for Solving the Problems) In order to solve the above problems, the present invention attaches an auxiliary drive to the track belt drive system of a small snowmobile through a freely connectable coupling, and also provides It is characterized in that a control switch means is provided at the front of the vehicle body.

(Function) The occupant moves to the front of the small snowmobile and operates the switch means to use the auxiliary drive to move the track belt forward at a slow speed while pulling the vehicle forward to try to escape from the stuck vehicle.

(Example) FIG. 1 is a side view of a small snowmobile according to the present invention.

The small snowmobile 1 has steering skis 3.3 at the front lower part of the vehicle body 2 and a track belt 4a at the rear lower part.

This track belt 4a is passed between a driving wheel 4b and a driven wheel 4c, and the lower surface of the track belt abuts against the road surface 5 to support the rear part of the vehicle body.

The drive wheels 4b are connected to a track belt drive system 6 mainly composed of an engine 7 mounted on the upper front portion of the vehicle body.

Figure 2 is a developed view of Figure 1 along line A-A, and Figure 3 is the
It is a figure which shows the engine part of a figure.

As shown in FIG. 3, the engine 7 includes a crankshaft 7a, connecting rods 7b, 7b, and a piston 7c.

7c, a two-cylinder engine consisting of cylinders 7d and 7d, with a drive pulley 7e fitted on the output side of the crankshaft,
Wrap ■belt 7f around this drive pulley.

A gear 7h is secured with a key and a bolt to the upper tapered portion of the crankshaft 7a via a boss 7g.

Furthermore, a gear coupling 8 and a starter motor 9 gear-coupled to a first gear 8a of this gear coupling are attached to the crankcase 7j.

The gear coupling 8 is a special gear coupling that advances the second gear 8b upward in the figure during high speed rotation and moves it backward during low speed rotation.

The second gear 8b is arranged to move forward and mesh with the gear 7h.

At the rear of the engine 7, as shown in FIG. 2, an intermediate shaft 10 is arranged parallel to the engine crankshaft 7a. This intermediate shaft is supported by the vehicle body 2 via bearings 10a, 10a, and has a driven pulley 10b fixed to one end opposite to the drive pulley 7e, and a transmission pulley 10c fixed to the other end.

This transmission pulley 10c collectively includes a transmission pulley 4f attached to the end of a driving wheel shaft 4d, which is the shaft of the driving wheels 4b and 4b of the track belt, and a belt 11 that is passed around these pulleys 4f and 10c. It is housed in an enclosing transmission case 12.

Furthermore, an auxiliary drive unit 13 consisting of a planetary gear reducer 13a and a motor 13b is attached to the transmission case 12.
The output shaft 13c of this auxiliary drive machine is connected to the shaft end of the drive wheel shaft 4d by a coupling 14 that can be connected or disconnected.

This coupling 14 is, for example, a set of two hubs 1 with claws.
4a, 14b and a hawk-shaped lever 14c that reciprocates one hub 14b in the axial direction. The fork-shaped lever 14c is connected to a shift lever, which will be described later, and the clutch is turned on and off when the shift lever is operated by a passenger.

The motor 13b of the auxiliary drive device 13 is connected to a generator or a battery attached to the engine 7, and whether or not power is supplied is controlled by a switch provided in the cable harness.

This switch means will be described in detail below.

FIG. 4 is an enlarged view of the front part of the ski, in which the ski 3 has a grip member 3b fixed to the front part of the ski 3a.

This grip member is a curved vibrator, and the ski 3
It is designed to be used to push, pull, or lift objects artificially.

A forward switch means 20 is provided on the back surface 3c of this grip member 3b.
and reverse switch means 30 are attached. and the cable harness 20a of the switch means 20.30,
30a passes inside the pipe of the grip member 3b and is drawn into the vehicle body 2 through the groove 3d on the upper surface of the ski 3a.

FIG. 5 is a sectional view taken along the line B--B in FIG. 4, and the switch means 20 has a waterproof specification in which the movable member is covered with rubber 20b. The switch means 30 has the same structure as the switch means 20.

The operation of the small snowmobile constructed as described above will be described below with reference to FIG. 6, which is an explanatory diagram of the operation, and FIG. 7, which is a perspective view of the steering handle.

As shown in FIG. 6, when the track belt 4a is deeply buried in the snow and becomes difficult to escape, that is, becomes stuck, the following procedure is used to try to escape the stuck state.

For example, the occupant pulls a shift lever 16 provided on the right side of the handle 15 shown in FIG. 7 toward the driver.

The shift lever 16 is stored in the lever storage recess 17 as shown in the figure, and is in the normal mode, that is, the hawk-shaped lever of the coupling is tilted to turn the coupling 14 off.

Then, when the shift lever 16 is pulled up, the mode is switched to the auxiliary mode, and in this auxiliary mode, the rotational speed of the engine 7 is reduced to an idling state, and then the coupling 14 is brought into a connected state. Thinning out ignition, so-called ignition cut, is suitable for this rotational speed reduction method, and by this reduction method, the drive pulley 7e of the crankshaft and the V-belt 7f become loose.

The occupant gets off the small snowmobile 1 with the engine 7 in the idling state and turns forward.

Grip the grip member 3b vibrator at the front of the ski 3 and activate the forward switch means 20 therein. The auxiliary drive device 13 is supplied with power from the engine's generator or battery, and moves the track belt 4a forward at a slow speed.

The occupant operates the switch means 20 while holding the grip member 3.
b strongly in the direction of arrow C in the figure.

As a result, the vehicle body 2 is pulled, and the track belt 4a moves forward to bring the front portion of the track belt into contact with the road slope 5a. The track belt climbs this slope 5a while moving forward at a slow speed, and as a result, the small snowmobile 1 escapes.

In addition, in this embodiment, since the grip member 3b is also provided with a reverse switch means 30, the occupant can move the small snowmobile 1 forward or backward at a slow speed as appropriate depending on the stack situation. You may be able to easily escape from a stuck position by moving backwards to allow a run-up distance and then moving forward.

Further, since the switch means 20 and 30 are provided on the back side of the grip member 3b, it is difficult for them to receive snow or the like that normally flies during the movement. Furthermore, since the cable harness is not exposed, it is susceptible to damage by these flying objects.

FIG. 8 shows another embodiment of the switch means 20.3.
Switch means 40 and 50 having the same structure as 0 are attached to the front bumper 18. In a rather large snowmobile where the two skis 3.3 are spaced apart from each other to the left and right and cannot be gripped with both hands, the front bumper 18 may be constructed of a pipe and serve as a grip.

Therefore, by providing the switch means 40.50 on the back side of the front bumper 18, it is possible to achieve the same effect as the switch means 20.30 provided on the front part of the ski.

The present invention is characterized in that the engine 7 is not directly operated to escape the stack. This allows work to be done in front of the snowmobile.

(Effects of the Invention) As described above, according to the present invention, it is possible to easily escape from a stack by simply pulling the front part of a small snowmobile while pressing a switch, and the crew member can easily escape the stack without any special assistance. Improve your sexuality.

[Brief explanation of drawings]

Figure 1 is a side view of a small snowmobile according to the present invention, and Figure 2 is a side view of a small snowmobile according to the present invention.
Figure 3 is a diagram showing the engine part in Figure 2, Figure 4 is an enlarged view of the front part of the ski, Figure 5 is a sectional view taken along line B-B in Figure 4, FIG. 6 is an explanatory diagram of the operation, FIG. 7 is a diagram showing the area around the steering handle, FIG. 8 is a diagram of another embodiment, and FIGS. 9(a) to (c) are diagrams showing a conventional example. 1...Small snowmobile 2...Vehicle body 3...Steering ski 3b...Grip member 4a...Track belt 6...Track belt drive system 13...Auxiliary drive machine 14... Couplings 20.30, 40.50...when switching means Applicant: Honda Motor Co., Ltd. Agent Patent attorney: 1) Part 1 Patent attorney: Kuni Ohashi Patent attorney: Koyama
Figure 7 (a) Figure 9

Claims (2)

[Claims] (1) In a small snowmobile equipped with steering skis at the front lower part of the vehicle body and a track belt at the rear lower part of the vehicle body, an auxiliary drive is connected to the track belt drive system of the small snowmobile through a coupling that can be freely connected. In addition to adding
A small snowmobile characterized in that a switch means for controlling the auxiliary drive device is provided at the front of the vehicle body. (2) The small snowmobile according to claim 1, wherein the switch means is attached to a grip member at the front of the ski for steering.