RU2732640C1 - Support bicycle caterpillar drive - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to bicycle caterpillar drives. Bicycle drive includes a frame, a caterpillar track, drive rollers, caterpillar rollers, stretching compression elements. Said structure is located at bottom under bicycle drive wheel. Wheel has support on drive rollers, caterpillar track and rollers of caterpillar track have size not limited by frame. Said structure can move along wheel axle.

EFFECT: reduced pressure to surface due to sufficient width of track.

6 cl, 6 dwg

Description

The invention relates to an attachment for bicycles for movement on snow and / or mud.

From the prior art, patent KR 101148449 is known, which describes an off-road bicycle in which the track is located simultaneously on the driving and driven wheels, which requires space between them for extending the track and, accordingly, the original frame. Differences from the stated solution are that:

- The support track drive is an attachment to a standard bicycle;

- Support tracked drive does not require any changes in the design;

- The support track is located on the rear drive wheel and does not interfere with steering.

Known patent CN 2910765, describing a bicycle with a caterpillar drive, which uses the original design of the rear, consisting of two wheels. Differences from the stated solution are that:

- The support track drive is an attachment to a standard bicycle;

- Support track drive does not require any design changes.

Known patent KR 101128842, describing a bicycle in which the crawler drive is a replacement for the standard wheel. Differences from the stated solution are that:

- The support track drive is an attachment to a standard bicycle;

- The support crawler drive is based on the operation of a standard wheel and has the ability to shift axially if necessary to move on the wheel.

Known patent CN 2262524, describing a bicycle in which the original design of the rear with a caterpillar drive is applied. Differences from the stated solution are that:

- The support track drive is an attachment to a standard bicycle;

- The support crawler drive is based on the operation of a standard wheel and has the ability to shift axially if necessary to move on the wheel.

The closest solution is US patent 7,232,130, which describes a rear crawler drive of a bicycle in which the track can have its own drive wheel or be put on an existing one. But with such a device, the dimensions of the track can be limited by the size of the bicycle frame and, regardless of the position of the tensioner, the track, put on the rear wheel, will always be in contact with the ground, regardless of weather and road conditions, which on paved roads can lead to its rapid abrasion. In addition, the invention describes a fastening structure that may lead to the need for changes in the structure of the existing invention. Differences from the stated solution are that:

- The support track drive is a bike attachment;

- If necessary, the support track drive can be shifted along the wheel axis, allowing you to continue moving without using the track;

- Although the support track drive is attached to the bike frame, the main structure is taken out of it, which allows the manufacture of a track and track rollers of various widths;

The track support drive is able to provide the best start to movement on loose and liquid surfaces due to wide track spacing.

The technical result of the claimed invention is to create a tracked bicycle drive that would have the ability to quickly fold-unfold for movement on different surfaces, would have low pressure on the surface due to the sufficient width of the track and would provide the maximum contact patch with the surface on relief terrain.

The technical result is achieved by placing a tracked drive (drive frame) on the wheel axis with the ability to rotate along this axis from the position of movement on the surface on the tracks to the position of movement on a standard wheel. Low pressure on the surface is ensured by the possibility of manufacturing and installing track rollers and the track itself of any width, which is limited only by the strength of the joints. And the contact patch on the relief terrain is provided by compression-tension elements that allow the tracked drive, upon contact with the surface, to move within certain limits in a floating mode.

Particular cases of manufacturing a structure are:

- Manufacturing of a structure with fastening only on the axle or on the axle and / or frame of the bicycle;

- The use of additional fastening elements of the structure;

- Manufacturing of a structure with an increased or reduced number of drive rollers or track rollers;

- Manufacturing of a structure that has no connection with the axle of the wheel;

- Manufacturing of a structure without compression-tension elements;

- Manufacturing of a structure with a different method of transferring force between the elements.

Brief Description of Drawings:

FIG. 1 - General view of a bicycle with an installed support track drive in a working position;

FIG. 2 - An enlarged view of the installed support tracked drive in working position;

FIG. 3-General view of the installed tracked drive in the retracted position;

FIG. 4 - An enlarged view of the installed tracked drive in the retracted position;

FIG. 5 - Bottom view of the installed tracked drive;

FIG. 6 - Support track drive.

The following elements are indicated in the images of the bicycle track support drive:

1. Bicycle frame

2. Wheel

3. Steering wheel

4. Sitting

5. Pedal assembly

6. Track frame

7. Elements of compression-tension

8. Track rollers

9. Track (track) Y. Bearing or bushing

11. Drive rollers

12. Chain

13. Additional fastener

14. Tie rod

The work of the support track drive is carried out as follows:

When the crawler drive is brought into the working position, the drive wheel (2) of the bicycle rests on the drive rollers (11), while due to the weight of the structure together with the person, the closest contact of the wheel (2) with the drive rollers (11) is ensured. When driving, the person on the bike activates the pedal assembly (5) and rotates the drive wheel (2), which in turn makes the drive rollers (11) rotate. In this case, the drive rollers (11) rotate in the opposite direction, therefore, to redirect the rotation of the track rollers (8), it is possible to use an intermediate structure between rollers 11 and rollers 8 in the form of gears, rods, chains, etc., otherwise it is necessary to ensure operation pedal assembly (5) in the opposite direction.

Further, the drive rollers (11), with or without an intermediate structure, drive the rollers of the caterpillar (8), the movement of which ensures the movement of the caterpillar belt (9), which, leaning on the surface, makes the bicycle move.

In the event that, after driving on tracks, it is necessary to switch to driving on the wheel, it is necessary to stop and move the frame (6) along the wheel axis with the help of bearings (10) above, fixing the entire structure in a new position (folding the structure). At the same time, it is possible to use an additional structure that is attached to the bicycle frame and prevents the rotation of the structure along the wheel axis without the user's desire. An example of such a construction is shown in the pictures. Therefore, to move the track frame (6) along the axis of the wheel (2), it will be necessary to remove or release from rigid engagement an additional fastening element (13) and its rod (14), giving them the possibility of free movement and rotation at the joints. Further, the track frame (6), together with the entire structure, is moved to a new position, after which the fastening element (13) and its thrust are locked in a new position.

In the event that the terrain has irregularities, ups and downs, then for better adhesion of the caterpillar (9) to the surface, a floating mode of operation of the structure is used. In this mode, the compression-tension elements (7) can move slightly, ensuring the tilt of the track drive to one side or the other. Thus, the largest contact patch with a surface in difficult conditions and the least pressure on this surface is provided.

If it is necessary to stop in snow or mud, the wide track spacing (9) allows you to leave the bike in a standing position. And when you start moving, you just need to sit on the seat (4) and start rotating the pedal assembly (5). Thus, the design makes it possible to do without a preliminary push at the beginning of the movement, which is very difficult to accomplish on a loose surface.

Design features:

1. Additional mounting on the frame. Despite the fact that the drive wheel (2) of the bicycle is supported by a caterpillar drive, the ability to move the structure along the wheel axis creates the possibility of turning the structure on the wheel axis (2) without a person's desire when driving, especially at high driving loads. To prevent this rotation, it is recommended to secure the track frame (6) to the bike frame (1). This can be done using the described construction, or in any other way.

2. Covering the drive rollers (11). In winter, the elements of the structure may freeze up, which can lead to slippage of the elements during operation. It is especially important to avoid this on the drive rollers (11) which come into contact with the wheel by supporting the wheel on them, i.e. if they become icy, the wheel may begin to slip. To avoid this, it is possible to use a special coating of the drive rollers (11) using rubber materials, applying pimples, splines, grooves.

3. Drive roller system. The drive rollers (11) are connected into a system by means of a chain, put on sprockets, which are on each roller. This ensures the uniformity of rotation of all drive rollers (11) and even if one roller slips, the others will continue to transmit force.

4. Track roller system. The track rollers (8) are also integrated into a system to prevent the track (9) from slipping on separate rollers, as well as to prevent the links from breaking from excessive loads.

5. Lack of chains. Chains (12) are used to connect the drive rollers (11) and the track rollers (8), but the interconnection can be provided without them. Thus, the combination of rollers into systems is possible using intermediate elements (rollers, gears, rods, etc.).

The solution of the previously described problems is facilitated by the fastening of the structure on the axle with the possibility of rotation, the possibility of using track rollers and caterpillar tracks of any size and the use of compression-tension elements.

Claims (6)

1. Support track drive of a bicycle, including a frame, a track, drive rollers, track rollers, compression-tension elements, characterized in that the structure is located below the drive wheel of the bicycle, while the wheel is supported on drive rollers, the track and track rollers are not limited by the frame size, and the structure has the ability to move along the axis of the wheel. 2. The support crawler drive of the bicycle according to claim 1, characterized in that it has fasteners on the bicycle frame. 3. The support crawler drive of the bicycle according to claim 1, characterized in that the transmission of force from the drive rollers to the rollers of the caterpillar can be provided by means of intermediate rollers, gears, rods. 4. The support crawler drive of the bicycle according to claim 1, characterized in that the compression-tension elements provide the inclination of the track drive. 5. Support track drive of the bicycle according to claim 1, characterized in that the drive rollers can be covered with a rubber material or pimples, grooves, splines can be applied to them. 6. Support track drive of the bicycle according to claim 1, characterized in that the drive rollers and track rollers can be combined into systems using chains, as well as gear links, links using rods.

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