KR20140046800A

KR20140046800A - Pedal housing and sub-transmission device of chainless bike using sprocket bended 90°

Info

Publication number: KR20140046800A
Application number: KR1020120112907A
Authority: KR
Inventors: 강주신; 황칠성
Original assignee: 강주신
Priority date: 2012-10-11
Filing date: 2012-10-11
Publication date: 2014-04-21

Abstract

The present invention relates to a pedal housing and a lower speed gear of a chainless bike using a sprocket bent for 90 degrees, comprising a spline (10) inserted into a groove on the outer circumference of a main shaft (12); a rod pin insertion groove (20); sprockets (30, 30′ 30″) joined to the outer circumference of the spline (10) to be rotated; clutches (40, 40′, 40″) which are individually installed in a space between the spline (10) and the sprockets (30, 30′ 30″); a gear (50) installed on the outer side of a spring (12); a clutch (60) between the gear (50) and a housing (11); bearings (70, 70′, 70″) between the sprockets (30, 30′ 30″); a speed changing lever (80) inserted and fixed to the main shaft (12) using a rod pin (21); and lower speed gears (90, 90′, 90″) in which a rear wheel shaft (14) joined to each sprocket (30, 30′ 30″) is buried. Therefore, the present invention prevents accidents caused by speed changing by changing speed using the sprockets bent for 90 degrees; extends a service life without early abrasion or troubles of gear members; reduces the volume and the weight of a bike; and facilitates handling and operation.

Description

Pedal housing and sub-transmission device of chainless bike using sprocket bended 90 °}

The present invention relates to a bicycle shifting device, and more particularly, by using a sprocket bent at 90 degrees to be selectively restrained and released by a shifting structure actuated by a shifting lever, so that the shifting operation is accurate, smooth and noiseless. It relates to the pedal housing and lower transmission of a chainless bicycle using a sprocket bent at 90 degrees, which can be quieter, and its volume is small and its operation is easy, so that the convenience of weight reduction and handling of the bicycle can be pursued.

Bicycles have been widely used in transportation for many years. Recently, bicycles have been used for sports and fitness purposes. In addition, various types of bicycles have been developed, such as racing bikes, unpaved cross-country rides, and travel bicycles.

Many bikes are equipped with multi-speed transmissions to improve their handling performance according to different types of driving conditions. The existing bicycle transmission takes the form of a manually controlled transmission through a cable connected to the shift lever. Moving the shifting gear causes the tension of the cable to change, which causes the shifting device and the driving chain to move from one gear to the other. As a result, different pedal forces and pedal rotational speeds can be achieved depending on different gearing ratios.

As such a bicycle transmission, a "shift method of a bicycle transmission device" of Patent Publication No. 10-2008-77711 is disclosed in Japanese Patent Application Laid- A sprocket; A main body chain for connecting the sprocket for driving the main body and the sprocket for main body to transmit the rotational force of the rear wheel to the main body; A main body in which the magnitude of the pulling force for pulling the wire by the running speed of the bicycle is increased or decreased; A wire organically connecting the traction force of the main body and the restoring force of the rear derailleur; A rear derailleur driven by a pulling force of the main body pulling the wire; A chain that moves within the cassette sprocket by the rear derailleur and changes the gear ratio; It is composed of a cassette sprocket with a combination of multiple sprockets with different dimensional ratios. It makes it easy to ascend or descend the slope, hill or mountainous terrain of the road by easy shifting method. It is possible to improve the efficiency of the transmission and the convenience of use because it can be adjusted, and it can be installed without changing the structure of the bicycle and has a mechanical structure capable of mass production. .

However, the "shift method of the transmission for bicycle" of the above-mentioned Patent Publication No. 10-2008-77711 has a defect that the gear can not be changed without rotating the gear. For this reason, it is possible to perform an appropriate conversion of the gear only when the bicycle is in operation, and the passenger can not change the gear when the bicycle is at rest. This is particularly problematic when the transmission is shifted to a high-speed gear for high-speed running before the bicycle is stopped. Then, when the cyclist stops the bicycle, the cyclist must apply a large pedal force to the pedal to move the bicycle again. Since the shifting requires the rotation of the transmission gear by the forward driving of the bicycle, the occupant can not make the shift to the lower side in order to reduce the pedal force required to restart the bicycle.

Another drawback of such a conventional transmission is that it is worn prematurely and needs frequent maintenance since the gear is exposed to members and dust on the road.

Therefore, there is a demand for a multi-speed transmission for a bicycle which can be shifted when the bicycle is in a stopped state.

In addition, development of a transmission that does not require frequent maintenance without risk of premature wear and tear is desired.

The present invention has been invented to solve various defects and problems caused by the conventional gear shifting apparatus in view of the above situation, and an object thereof is to rotate a gear connected to a wheel shaft by shifting by using a sprocket bent at 90 degrees. The present invention provides a pedal housing and a lower transmission of an autonomous bicycle using a sprocket that is bent at 90 degrees, which can be easily shifted to prevent a safety accident caused by a shift.

Another object of the present invention is to shift the gearbox embedded in the pedal shaft so that the gear members of the gearbox are not exposed to the outside such as dust on the road, so that early wear or failure of the gear members does not occur, thus making it easy to maintain and use for a long time. The present invention provides a pedal housing and a lower transmission of a chainless bicycle using a sprocket bent at a long life of 90 degrees.

Still another object of the present invention is to shift the transmission gears built into the pedal shaft to achieve the accuracy and smoothness and quietness of the shifting operation. The present invention provides a pedal housing and a lower transmission of a chainless bicycle using a sprocket bent at 90 degrees.

Pedal housing and lower transmission of the chainless bicycle using the sprocket bent 90 degrees to the present invention for achieving the above object is wound in the longitudinal direction on the outer periphery of the main shaft 12 which is a pedal shaft embedded in the housing 11 A spline 10 inserted into a groove formed at an outer circumference of the main shaft 12 subsequent to the spring 13 and the spring 13 formed; A rod pin insertion groove 20 formed to be cut in a long side at one end of the main shaft 12; Sprockets 30, 30 '30 "rotatably cylindrically coupled to the outer periphery of the spline 10; clutches provided between each of the splines 10 and sprockets 30, 30' 30". (40, 40 ', 40 "); a gear (50) installed outside the spring (12); a clutch (60) installed between the gear (50) and the housing (11); and the sprocket ( 30, 30 '30 ") bearings (70, 70', 70") installed; the shift lever 80 is inserted into the main shaft 12 and fixed to the rod pin 21; and the sprocket 30 , 30 '30 "), characterized by consisting of lower transmissions 90, 90', 90" having rear wheel shafts 14 coupled to each other.

The present invention can be easily shifted without rotating the gear connected to the wheel shaft by shifting by using a sprocket bent at 90 degrees to prevent safety accidents caused by shifting, and shifting the shifting device built into the pedal shaft The gear members of the gearbox are not exposed to the outside such as dust on the road, so there is no premature wear or failure of the gear members, so the maintenance is easy and the service life is long, and the gearbox is built into the pedal shaft. It can provide accuracy and smoothness and quietness of silence, and it has a special advantage to pursue convenience in reducing weight and handling of the bicycle because of its small volume and easy operation.

1 is a cross-sectional view of a pedal housing and a lower transmission of a chainless bicycle using a sprocket bent at 90 degrees according to the present invention.

Hereinafter, the pedal housing and the lower transmission of the chainless bicycle using the sprocket bent at 90 degrees according to the present invention and the preferred embodiment will be described in detail.

1 is a cross-sectional view of the pedal housing and the lower transmission of the chainless bicycle using the sprocket bent 90 degrees of the present invention, the pedal housing and the lower transmission of the chainless bicycle using the sprocket bent 90 degrees of the present invention is a housing (11) A spring 13 formed by winding in a longitudinal direction on the outer circumference of the main shaft 12, which is a pedal shaft embedded therein, and a spline 10 inserted into a groove formed on the outer circumference of the main shaft 12 subsequent to the spring 13; ; A rod pin insertion groove 20 formed to be cut in a long side at one end of the main shaft 12; Sprockets 30, 30 '30 "rotatably cylindrically coupled to the outer periphery of the spline 10; clutches provided between each of the splines 10 and sprockets 30, 30' 30". (40, 40 ', 40 "); a gear (50) installed outside the spring (12); a clutch (60) installed between the gear (50) and the housing (11); and the sprocket ( 30, 30 '30 ") bearings (70, 70', 70") installed; the shift lever 80 is inserted into the main shaft 12 and fixed to the rod pin 21; and the sprocket 30 , 30 '30 "), consisting of lower transmissions 90, 90', 90 " having rear wheel shafts 14 coupled thereto.

Next will be described in detail the operation of the pedal mode of the chainless bicycle using the sprocket bent by the present invention configured as described above and the shift mode of the lower transmission device in detail.

1. Low speed mode

When the low speed mode is selected by the operation of the shift lever 80 mounted on the handle, the shift lever 80 moves in the direction of the arrow 3 as shown in Fig. 1, and when the low speed mode is selected, the sprocket 30 " And lower transmission 90 " are coupled to rotate the rear wheel shaft 14 at low speed.

2. Medium speed mode

When the medium speed mode is selected by the operation of the shift lever 80 mounted on the handle, the speed lever 80 moves in the direction of the arrow 3 as shown in FIG. 1, and when the low speed mode is selected, the sprocket 30 'is selected. And the lower transmission 90 'are coupled so that the rear wheel shaft 14 rotates at a medium speed.

3.High speed mode

When the high speed mode is selected by the operation of the shift lever 80 mounted on the handle, as shown in FIG. 1, when the shift lever 80 moves in the direction of the arrow 3 and the low speed mode is selected, the sprocket 30 and The lower transmission 90 is coupled so that the rear wheel shaft 14 rotates at high speed.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited thereto and that various changes and modifications may be made therein without departing from the scope of the invention.

10: spline 11: housing
12: spindle 13: spring
14: rear wheel shaft 20: rod pin insertion groove
30, 30 '30 ": Sprocket 40, 40', 40": Clutch
50: gear 60: clutch
70, 70 ', 70 ": Bearing 80: Shift lever
90, 90 ', 90 ": lower derailleur

Claims

A spring 13 formed by winding longitudinally on the outer circumference of the main shaft 12, which is a pedal shaft embedded in the housing 11, and a spline inserted into the groove formed on the outer circumference of the main shaft 12 subsequent to the spring 13. 10; A rod pin insertion groove 20 formed to be cut in a long side at one end of the main shaft 12; Sprockets 30, 30 '30 "rotatably cylindrically coupled to the outer periphery of the spline 10; clutches provided between each of the splines 10 and sprockets 30, 30' 30". (40, 40 ', 40 "); a gear (50) installed outside the spring (12); a clutch (60) installed between the gear (50) and the housing (11); and the sprocket ( 30, 30 '30 ") bearings (70, 70', 70") installed; the shift lever 80 is inserted into the main shaft 12 and fixed to the rod pin 21; and the sprocket 30 , 30 '30 ") pedal housing and lower transmission of the chainless bicycle using a sprocket bent 90 degrees consisting of a lower transmission (90, 90', 90") with a rear wheel shaft 14 coupled to each.