Automatic transmission for bicycle and transmission system
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A technology for automatic transmissions and bicycles, applied to vehicle gearboxes, chain/belt transmissions, vehicle components, etc., can solve the problems of fast wear of chains and toothed discs, high manufacturing costs, high maintenance costs, etc., to reduce weight and service life Long, reduce power loss effect
Inactive Publication Date: 2017-02-08
朱爱霞
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Abstract
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Problems solved by technology
This type of transmission has some obvious disadvantages: for example, the structure is relatively complex, and the force direction of the chain is not perpendicular to the axis of the rear axle and the central axle during the shifting process, resulting in large power loss, resulting in fast wear and short life of the chain and chainring. The efficiency is low, and the chain is prone to twisting, frustrating, falling off, or even breaking
This type of transmission also has some obvious disadvantages: for example, the structure is quite complicated, the manufacturing cost is high, the weight is heavy, the maintenance cost is high, and there is obvious frustration during the shifting process, etc.
Method used
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Embodiment 1
[0041] see Figure 1-8 , in the figure, the bicycle automatic transmission of the present invention includes a floating chainring 3 and a floating chainring driver 4, and the floating chainring 3 is installed on the floating chainring driver 4.
[0042] Wherein the floating toothed disk driver 4 includes a driving disk 401 , a moment arm 402 , a gear tooth 403 , a pin shaft 404 , an adjusting disk 405 , a torsion spring 406 , and a guide disk 407 .
[0043] Wherein the guide disc 407 and the adjustment disc 405 are located on both sides of the drive disc 401 respectively, and are connected with the drive disc 401 through threaded installation. The driving disc 401 is a disc-shaped structural component with a boss 4011. The boss 4011 has a middle hole 4012 passing through both sides of the driving disc 401, and the driving disc 401 is installed on the bicycle center shaft 6 through the middle hole 4012. The guide plate 407 is a disc-shaped structural part with a threaded hole ...
Embodiment 2
[0050] see Figure 9 In the figure, the bicycle transmission system of the present invention includes a floating chainring 3, a floating chainring driver 4, and a flywheel 1, a chain 2, a rear axle 5, a center shaft 6, a crank 7, a pedal 8 and a hub 9.
[0051] The flywheel 1 is a single-piece flywheel, and the flywheel 1 is installed on the hub 9 through the middle hole of the flywheel with a keyway and the freewheel, the hub 9 is installed on the frame through the rear axle 5, and the flywheel 1 is connected to the floating chainring through the chain 2 3 Cooperate connection, the floating chainring 3 is installed on the floating chainring driver 4, the floating chainring driver 4 is installed on the central shaft 6 through the middle hole, the pedal 8 is installed on the crank 7, and the crank 7 is installed on both ends of the central shaft 6 end, the central axis 6 is installed on the bottom bracket of the vehicle frame.
[0052] The structures of the floating toothed di...
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Abstract
The invention particularly relates to an automatic transmission for a bicycle and a transmission system. The automatic transmission comprises a floating tooth disc and a floating tooth disc driver, wherein the floating tooth disc driver comprises a driving disc, force arms, gear teeth, pin shafts, regulating discs, torsion springs and a guide disc, and the gear teeth are pressed into one ends, close to the driving disc, of strip-shaped through holes by the regulating discs under the action of the torsion springs through the force arms; and the floating tooth disc is mounted between the driving disc and the guide disc and comprises a tooth disc body and an inner tooth ring, teeth arranged on the excircle of the tooth disc body are meshed with a chain on the bicycle, and the inner tooth ring is meshed with a tooth ring formed by the gear teeth on the force arms in the floating tooth disc driver. The transmission system comprises the floating tooth disc, the floating tooth disc driver, a single-chip flywheel, the chain, a rear shaft, a middle shaft, a crankshaft, a pedal and a hub, wherein the flywheel is in matched connection with the floating tooth disc, and the floating tooth disc driver is mounted on the middle shaft through a middle hole. The automatic transmission is simple in structure, convenient to manufacture, low in cost, safe, reliable, excellent in performance and high in transmission efficiency.
Description
technical field [0001] The invention relates to a mechanical transmission type transmission, in particular to an automatic transmission and a transmission system for a bicycle, especially suitable for a chain transmission system. Background technique [0002] At present, the more speed changers used on bicycles are generally divided into two categories: one type of speed changer realizes speed change by changing the cooperation of a group of wheel discs with different diameters and a group of flywheels with different diameters and the chain. This type of transmission has some obvious disadvantages: for example, the structure is relatively complex, and the force direction of the chain is not perpendicular to the axis of the rear axle and the central axle during the shifting process, resulting in large power loss, resulting in fast wear and short life of the chain and chainring. The efficiency is low, and the chain is prone to twisting, frustrating, falling off, or even breaki...
Claims
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Application Information
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