JP3113603U - Bicycle powerful drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To break away from the conventional technique in which the number of rotations of a pedal increases as the climbing force increases on an uphill, and the pedal can be stepped on the flat ground and the uphill with the same number of rotations with a strong driving force. Provide a simple structure, robust, lightweight and powerful bicycle.
SOLUTION: A protruding metal fitting (2) in which a starting bevel gear (5a5b) is rotatably supported by the gear shaft supporting screw (8a8b) at both ends of a protruding metal fitting (2) fitted and fixed to a pedal shaft (1). The left bevel gear (3) is fixed to the bicycle frame etc. so that it does not rotate on the left side, and the chain gear (10) is fixed to the right bevel gear (4) on the right side so that it can rotate freely on the pedal shaft (1). The drive device is configured by supporting the pedal shaft (1) on the frame or the like with the bearing (11) and attaching the pedal (12a12b) with the bearing (11). I did it.
[Selection] Figure 2

Description

Detailed description of the invention

  This invention relates to a driving device in a bicycle.

  Conventional bicycle driving methods have not been improved until the present day since the birth of the bicycle. Some bicycles have multiple gear switching types, but the mechanism is complicated and the operation is cumbersome and the vehicle body is heavy. In addition, the biggest drawback is that the pedals are heavy to run fast, the slower the stronger the climbing, the faster the pedals must be stepped on, and there is a limit to fast pedaling. Is unsuitable.

Problems that the device tries to solve

  Simple structure, light weight, robust and powerful driving force, as well as on flat terrain Even on the hill, the pedal can be stepped at the same speed as on the flat terrain, and we will provide a bicycle that can be easily climbed while riding on the hill that was pushed up until now. To do.

Means for solving the problem

  In order to achieve the above-mentioned object, the bicycle drive device according to the present invention has a pedal installed at the same position as a conventional bicycle, and a combination of two small and large bevel gears on the pedal shaft reduces the consumption of force applied to the pedal. It is intended to transmit a strong driving force to the rear wheel with a smaller diameter than the conventional gear by giving the gear on the pedal side a powerful and quick rotation by amplifying the rotation speed by a factor of 2 while holding it to a minimum. is there.

  The greatest feature of this device is the difference in how power is transmitted from the conventional technology. In conventional technology, the driving force is reduced to increase the speed. This device conversely reduces power loss to a minimum, doubles the number of revolutions, reduces the gear diameter by half, and transmits a strong force to the rear wheels.

  For the double rotation of the gear according to the present invention, a rectangular solid metal fitting called a fitting fitting is fitted and fixed to a single pedal shaft, and a starting bevel gear is rotatably supported at both ends of the protruding fitting. In addition, the gears on the left and right sides of the projection fitting are meshed with the starter shade gear so as to freely pivot on the pedal shaft. When the pedal shaft is rotated, the projection fitting fixed together with the pedal shaft also rotates. The start cap gear is pivotally supported by this projection bracket, and the left and right cap gears mesh with each other and rotate at the same speed. At this time, when either one of the left and right cap gears is stopped, it is fixed to the pedal shaft. Since the protruding metal fittings are rotating, the starting claw gear of the metal fittings starts to rotate according to the teeth of the stopped capped gear, and the other free-wheeling gear rotates one more rotation. The bevel-shaped gear rotates twice by one pedal rotation.

  In the drive device of this device, the force applied to the pedal is that the pedal shaft acts as a fulcrum and the pedal applies the force, and the distance between the two is the length of the pedal arm, which is in the middle of the pedal arm. It can be seen that there is an activation bevel gear, and the tooth position of this activation bevel gear is the position of the teeth of the left and right shade wheel. In other words, the force applied to the pedal, which is in the form of a conventional bicycle pedal with one shaded gear, is a little necessary to rotate two starting shaded gears and one right shaded wheel tooth. All the remaining power minus the depletion of power is the driving force. The position of the teeth of the left and right shaded wheels at the midpoint between the fulcrum pedal shaft and the point pedal is stronger as it is closer to the pedal shaft that is the fulcrum of the pedal. In other words, the smaller the diameter of the shade-shaped wheel teeth, the stronger the drive mechanism. Therefore, the drive mechanism can be reduced in size and weight.

Effect of device

  As described above, the present invention minimizes the consumption of force applied to the pedal and doubles the number of rotations. Therefore, the pedal side chain gear is reduced to half the conventional size. For example, even when the rear wheel side chain gear is the same as the conventional one, a driving force nearly twice that of a conventional bicycle can be obtained.

  This will be described with reference to the drawings. FIG. 1 is an exploded oblique side view of the drive device. FIG. 2 is an assembled cross-sectional view of FIG.

  (1) The pedal shaft (2) is a projecting bracket (a rectangular solid bracket with a hole through which the pedal shaft penetrates on the side, and a screw hole for pivotally supporting the starting bevel gear on the short side. ) (5a5b) is the name of the small bevel-shaped gear of the two large and small bevel-shaped gears as the "start bevel-shaped gear".

  The bearing (7a7b) is fitted on the starter cap gear (5a5b) on both sides of the protruding metal fitting (2) that is fitted and fixed to the pedal shaft (1) of the drive device, and is rotated by the starter cap gear support screw (8a8b). Shaft-shaped gears (3) and (4), which are freely pivotally supported and fitted with bearings (9a9b) on the left and right sides of the protruding metal fitting (2), respectively, are connected to the pedal shaft (1) so as to mesh with the starting shade-shaped gear (5a5b). The left shade gear (3) is fixed to the bicycle frame or the like with a fixing screw (6) so that the left shade gear (3) does not rotate, and the chain gear (10) is fixed to the right shade gear (4) on the back. The pedal shaft (1) is pivotally supported on a bicycle frame or the like by a bearing (11) and a pedal (12a12b) is mounted.

  When the pedal (12) is stepped in the traveling direction, the protruding metal fitting (2) also rotates in the same direction. At this time, the starting bevel gear (5a5b) attached to the protrusion metal fitting (2) so as to be freely rotatable is fixed so as not to rotate, and the left bevel gear (3) and the right bevel-shaped gear (4) rotatably supported. Since both sides mesh with each other, the starting bevel gear (5a5b) is pushed by the projection fitting (2), and in order to advance in the direction of travel, the teeth of the stationary left bevel gear (3) are bitten and turned counterclockwise. While rotating the right shade gear (4) at twice the speed of the pedal rotation, as described above, a strong force is transmitted to the right shade gear (4). 10) is a drive device that fixes the chain (14) between the rear wheel side chain gear (13).

  FIG. 3 is a side view of a bicycle in which the drive device of the present invention is implemented. Since the drive device described above is powerful and has twice the number of rotations as the conventional one, the pedal side chain gear (10) can be made smaller, and the rear wheel side chain can be reduced. The gear (13) became larger. FIG. 4 is a partial plan view of a bicycle in which the driving device is implemented (a diagram in which the driving device is directly applied to the bicycle frame). FIG. 5 and FIG. 6 store the driving device in a housing to protect it from water and dust. It is a figure which prevents the clothes from getting dirty and makes it easy to attach and remove from the bicycle frame.

Effect of device

  The force applied to the pedal does not disappear so much, and the pedal side chain gear (10) rotates twice by one rotation of the pedal, so that the number of teeth can be reduced to half of the conventional and strong against the rear wheel. You can convey the power, you can climb the climbing road that you could not climb until now.

Industrial applicability

  As described above, the present invention is very simple with only a combination of four bevel gears, so that it is easy to manufacture a bicycle, is simple and robust, and is light in weight because of its small mechanism, and both the front and rear wheels are conventional. There is also an advantage that the technology can be used as it is. This device will surely evolve the future bicycle.

  It is a decomposition | disassembly diagonal side view of the drive device of this invention.   It is an assembly sectional view of FIG.   It is a side view of the bicycle to which this device is applied.   FIG. 4 is a partial plan view of FIG. 3.   It is the figure which stored the mechanism part in the housing.   It is the figure which took out the housing with the pipe-shaped shaft which sealed the mechanism part and gave the chain gear with the left screw on both sides.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pedal shaft 2 Protrusion metal fitting 3 Left shade gear 4 Right shade gear 5a5b Startup shade gear 6 Left shade gear fixing screw 7a7b Activation shade gear bearing 8a8b Activation shade gear shaft support screw 9a9b Left and right shade gear bearing 10 Pedal side chain gear 11 Pedal shaft Shaft bearing 12a12b Pedal 13 Rear wheel side chain gear 14 Chain 15 Rear wheel 16 Frame 17 Housing case 18 Housing outer wall 19 Pipe shaft “Pipe for sealing the mechanism and transmitting rotation of the right shade gear (4) to the chain gear In this shape, the pedal shaft is passed through the inside and left screws are applied to both sides of the pipe to connect the right shade gear (4) and the chain gear (10). 』

Claims (1)

A driving device for propelling a bicycle, which is fitted to and fixed to a pedal shaft (1) of the driving device concentrically, and is fixed to a start-up gear (5a, 5b) at both ends of a protruding metal fitting (2) with bearings (7a, 7b) ) And a left shaded gear (with a bearing (9a, 9b) fitted on the left and right sides of the projection fitting (2). 3) and the right shade gear (4) are supported by the pedal shaft (1) so as to mesh with the start shade gear (5a, 5b), and the left shade gear (3) is fixed to the bicycle frame so that it does not rotate. Further, a chain gear (10) is fixed to the back surface of the right shade gear (4) and is rotatably supported together with the bearing (11), and the pedal shaft (1) is supported on a bicycle frame and the like. Pedal (12a, 12 ) Bicycle drive unit equipped with.

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