RU44629U1 - SNOWMOBILE - Google Patents

Abstract

The utility model relates to the field of mechanical engineering and, in particular, to vehicles with a caterpillar mover designed for driving on snowy surfaces. Essence: the snowmobile is equipped with six pairs of rollers, three pairs for each track, rigidly mounted to the suspension arms and located in the places of bending of the tracks, and the engine is installed in front of the gearbox along the snowmobile. The proposed utility model improves the performance of the snowmobile, its reliability and maneuverability.

Description

The utility model relates to the field of mechanical engineering and, in particular, to vehicles with a caterpillar mover designed for driving on snowy surfaces.

Known snowmobile "Buran" SB-640MD (Operation manual / type. OAO NPO Saturn, t.3000, 3.3227, 2001) A known device that is selected as a prototype of the claimed technical solution contains a frame on which are placed an engine, a transmission, in the form of a V-belt variator and a reducer, a running gear, in the form of a slewing ski and two caterpillar drives, each of which contains a caterpillar, drive and guide shafts, the drive shafts being connected to the gearbox by a common chain transmission, as well as clamping means caterpillars to erhnosti movement performed in a nip of rollers, by means of installed lever-spring suspension to the frame. The specified analogue has a number of disadvantages, namely:

1. the presence of pressure rollers, preventing the faster movement of the snowmobile and weighting the structure as a whole.

Therefore, when driving while driving along castles and other irregularities, snowmobile rollers bend around them and, as a result, the load on the snowmobile engine increases and fuel consumption increases.

2. The center of mass of the prototype snowmobile is shifted to its rear. Therefore, when driving while riding, especially on loose and damp snow, the snowmobile ski rises, and the snowmobile does not respond well to steering wheel turns.

The task to which the proposed utility model is directed is to increase the operational characteristics and reliability of the snowmobile.

This problem is achieved by the fact that the known device, including a frame on which the engine, transmission, in the form of a V-belt variator and gearbox, a running gear, in the form of a slewing ski and two caterpillar drives, each of which contains a caterpillar, a drive shaft, each drive shaft is connected to the gearbox by a chain transmission, as well as a means of clamping the tracks to the surface of the movement, mounted by

the lever-spring suspension to the frame is equipped with six pairs of rollers, three pairs for each track, rigidly mounted to the suspension arms and located in the places where the tracks are bent, and the engine is installed in front of the gearbox along the snowmobile.

The clamping means of each track are made in the form of rectangular pipes having a central guide groove in the lower plane, and directly the clamping strips themselves, covering the pipes in their lower part and mounted to them by a protrusion corresponding to the pipe guiding groove, the clamping strips themselves made of plastic . The ski mounting axis, relative to the axis of rotation of the drive shaft, is at least half the length between the rotation axes of the drive shaft and idler rollers.

Figure 1 shows a snowmobile, side view; in Fig.2 snowmobile, top view, Fig.3 is a cross section of the clamp means of the caterpillar mover, where:

1 - slewing ski;

2 - case;

3 - engine;

4 - V-belt variator;

5 - gear;

6 - chain transmission;

7 - drive shafts;

8 - caterpillars;

9 - tube means clamp;

10 - a strip of a clip;

11 - pressure reducing rollers;

12 - supporting rollers;

13 - tension rollers;

14th ski mount;

Snowmobile works as follows.

From the crankshaft of the snowmobile engine, through the variator, by means of the V-belt, and the gearbox, by means of the chain, the torque is transmitted to the drive shafts of the caterpillar tracks. The rotation of the drive shafts meshed with the tracks sets the latter in motion.

The clamping means of each track are made in the form of rectangular pipes having a central guide groove in the lower plane, and directly the pressure strips themselves, covering the pipes in their lower part and mounted to them by means of a protrusion corresponding to the pipe guiding groove.

Therefore, when a snowmobile runs over bumps in the form of a tubercle or a sprue, the spring-loaded suspension is damped over the entire length of the track holding track to the snow surface.

This design allows you to overcome bumps with a single oscillation of caterpillar movers. This design feature allows you to maintain a constant speed and save fuel consumption when traveling over rough terrain, compared with the analogue, in which each tracked mover has as many impacts and vibrations as one track rollers rolls over. Therefore, when hitting bumps in order to avoid strong shaking, you have to reduce speed.

The presence in the design of two pairs of rollers located in the lower bend of the tracks, reducing pressure on the pressure strips, two pairs of rollers in the upper bend of the tracks supporting the tracks, and two pairs of rollers in the stern of the snowmobile, designed to tension the tracks, respectively:

- reduce pressure on the pressure strip that occurs while riding a snowmobile;

- to ensure the movement of the track along a given path relative to the axes of the rollers;

- set the required track tension;

This design feature ensures optimal wear of the plastic clip strip and simplifies the design of the snowmobile, which increases its performance.

When the snowmobile is moving, the slewing ski is in constant contact with the snow surface, because the axis of the ski mount, relative to the axis of rotation of the drive shaft, is at least half the length between the rotation axes of the drive shaft and idler rollers.

The location of the engine in front of the gearbox along the snowmobile provides a shift in the center of mass of the snowmobile to the ski.

These design features increase the maneuverability of the snowmobile and reduce the radius of the snowmobile, in comparison with the analogue, in which the engine is located behind the gearbox in the direction of the snowmobile (shifting the center of mass on the tracks), therefore, when moving in loose and deep snow, its supporting-rotary ski lifts up, losing contact with the surface.

Claims (4)

1. Snowmobile, including a frame on which the engine, transmission, in the form of a V-belt variator and gearbox, undercarriage, in the form of a slewing ski and two caterpillar drives, each of which contains a caterpillar, drive and guide shafts, each drive shaft connected to the gearbox by a chain transmission, as well as a means of clamping the tracks to the surface of the movement mounted by means of a lever-spring suspension to the frame, characterized in that the snowmobile is equipped with two pairs of rollers that reduce pressure, two pairs of support track rollers and two pairs of tension rollers, rigidly mounted to the suspension arms and located in the places of bending of the tracks, and the engine is installed in front of the gearbox along the snowmobile. 2. The snowmobile according to claim 1, characterized in that the clamping means of each track are made in the form of rectangular pipes having a central guide groove in the lower plane, and directly the clamping strips themselves, covering the pipes in its lower part and mounted to them by means of a protrusion, corresponding to the guide groove of the pipe. 3. Snowmobile according to claim 1, characterized in that the clamp strip is made of plastic. 4. The snowmobile according to claim 1, characterized in that the axis of attachment of the slewing ski relative to the axis of rotation of the drive shaft is located at a distance of at least half the length between the rotation axes of the drive shaft and idler rollers.