JPS5930788Y2 - A device that brings the drive roller of a bicycle with an engine into contact with and separates from the rear tire surface. - Google Patents

Description

[Detailed description of the invention] This invention relates to a device in which an engine equipped with a pedal crankshaft and a driving engine for driving a wheel presses a driving roller to the tire surface of a wheel so as to be able to move toward and away from the tire surface of the wheel. The purpose of this is to mount the engine in the optimal position on the frame, to simplify the configuration of the drive rollers coming into contact with and away from the wheels, and to easily and reliably switch between human-powered running and engine-powered running with a simple operation. The goal is to make it possible.

To explain this idea with drawings, 1 is the engine, 2
3 is a rear wheel, and 3 is a backbone, which is bent into a key shape with a horizontal rod portion 3a and a vertical rod portion 3b, and its inner corner is opposed to the inner corner of the vertical pipe 5 and the chain stay 32. Let me,
One end of the horizontal rod portion 3a is welded and fixed to the upper part of the vertical pipe 5, and the other end of the vertical rod portion 3b is welded and fixed to the setter 33. The horizontal rod portion 3a is disposed above the rear wheel 2, and the rear wheel The engine 1 is installed in a space 34 between the upper surface of the engine 2 and the upper surface of the engine 2, and the engine 1 is supported on the horizontal rod portion 3a.

4 is a fixed shaft having both ends fixed to the upper part of the vertical rod part 3b of the backbone 3; 6 is a U-shaped support whose rear end is supported on the fixed shaft; bearings 7 and 8 are fixed to the front end; A rotating shaft 10 with a groove wheel 9 attached to one end is mounted on the shaft.

Reference numeral 11 denotes a drive roller attached to the rotating shaft 10 between the bearings 7 and 8, and 12 is a connecting piece whose lower end is connected to a suitable position near the front part of the support frame 6, and a saucer 13 is formed integrally with the connecting piece. A guide tube 15 for supporting a coil spring 14 is integrally formed and erected therein.

Reference numeral 16 denotes a receiving plate attached to the lower surface of the frame 17 extending over the horizontal rod portion 3a of the backbone 3, and supports the upper end of the coil spring 14.

The coil spring 14 is pre-compressed so as to maintain a required elastic force between the receivers 13 and 16.

Reference numeral 18 denotes an operating lever whose base end 22 is pivotally supported 23 on a mounting frame 21 attached to the head portion of the vehicle body 19. On the lever, there are provided an engagement protrusion 24 before and after an engagement protrusion 24 provided behind the mounting frame 21. A locking ring 25 is fitted into the locking recesses 26a and 26, and this locking ring 25 is always held in pressure contact with a spring 27, and its rear end is attached to the lower end of the base end 22 of the operating lever. Through the guide groove wheel 28 located above the bearing 7 of 6,
The front end of a transmission wire 300 is connected to a connector 29 provided at the front end of the bearing 7.

Since this invention is constructed as described above, the engine 1 is supported by the transverse rod part 3a of the backbone bent into a key shape and is disposed directly above the rear axle 2, so that the engine 1 is protected from the dirty spring. In addition to protecting the passengers, there is no oil stains, and space can be utilized to easily and robustly install the system.

In addition, the drive roller 11 for the rear wheel 2 is supported by the front end of a U-shaped support frame 6 whose rear end is pivotally supported by a fixed shaft 4 extending horizontally over the top of the vertical rod portion 3b of the backbone 3. By supporting the front end of the support frame 6 with an expanded coil spring 27, the front end of the drive roller 11 is lowered around the fixed shaft, and the drive roller 11 is applied to the rear wheel 2 from above with an appropriate pressing force. It can be pressed into contact and reliably transmits driving force.

Further, the transmission belt 31 is applied to the output shaft (not shown) of the engine 1 and the drive roller 11, but since the transmission belt 31 is applied from the front and rear sides of the support frame 6, the front end of the support frame 6 is pulled up and the drive roller 11 When moving away from the rear wheel 2, the drive roller 11 approaches the output shaft of the engine 1, allowing the transmission belt 31 to loosen its tension and rest.

This significantly improves the durability of the drive roller 11 and drive belt 31.

Moreover, the driving roller 11 can be easily moved toward and away from the rear wheel 2 by operating the operating lever 18.

As described above, according to this invention, it is possible to easily switch between manual driving by stepping on the pedals and engine-driven driving, and the structure is simple and the drive mechanism is reliable and practical.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is an overall side view showing the case where the engine is installed on the rear wheel, Fig. 2 is an enlarged plan view of the drive roller device section, and Fig. 3 is an enlarged plan view of the drive roller device section. The vertical side view and FIG. 4 are explanatory views of the operation of the operating lever device for operating the transmission wire. 1... Engine, 2... Rear wheel, 3... Frame, 4... Fixed shaft, 5... Bank frame, 6...
・U-shaped support frame, 7.8... Bearing, 10... Rotating shaft,
11...1 drive roller, 114...coil spring, 17...frame, 18...operation lever, 21
... Mounting frame, 24... Engagement protrusion, 25... Locking ring,
26at26b... Engagement recess, 30... Transmission wire.

Claims (1)

[Scope of utility model registration request] The back bone 3 is bent into a key shape with a horizontal rod portion 3a and a vertical rod portion 3b, and its inner angle is opposed to the inner angle of the vertical pipe 5 and chain stay 32, and the horizontal rod portion 3b is bent into a key shape. Part 3
One end of a is welded and fixed to the vertical pipe 5, and the other end of the vertical rod part 3p is welded and fixed to the setter 33, and the horizontal rod part 3a is disposed above the rear wheel 2 and is in contact with the upper surface of the rear wheel 2. The engine is mounted in a space 34 between the two, and a fixed shaft 4 is horizontally extended and fixed at a suitable position near the upper end of the vertical rod part 3b, and a U-shaped support frame 6 is mounted on the fixed shaft.
The rear end is pivotally supported, and bearings 7 and 8 are provided at the front end of the support frame,
A rotating shaft 10 related to the output shaft of the engine is mounted on the bearing, and a drive roller 11 is fixed between the bearings of the rotating shaft,
A coil spring 14 which is compressed in advance and is given an elastic force between the horizontal rod portion 3a of the back bone 3 and the U-shaped support frame 6.
intervenes to press the U-shaped support frame 6 downward at all times, and the bearing 8
, 9 or the supporting frame 6 at the rear end thereof, and the front end thereof was connected to the tightening/releasing operation lever 18 installed on the head portion 20 of the vehicle body 19 via a guide groove wheel 28 disposed directly above the connecting portion. A device for bringing the drive roller of a bicycle with an engine into contact with and separating from the tire surface of the rear wheel.