CN212667595U - Parallel transmission link mechanism for bicycle - Google Patents
Parallel transmission link mechanism for bicycle Download PDFInfo
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- CN212667595U CN212667595U CN202021440688.2U CN202021440688U CN212667595U CN 212667595 U CN212667595 U CN 212667595U CN 202021440688 U CN202021440688 U CN 202021440688U CN 212667595 U CN212667595 U CN 212667595U
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Abstract
A parallel transmission linkage mechanism for a bicycle. Referring to the attached figure 3 of the specification, the parallel transmission link mechanism is composed of a set of parallelogram four-link transmission mechanism and a simple speed-increasing planetary gear set, power is transmitted to the set of parallel transmission link mechanism composed of a pedal rotation short link, a parallel transmission long link and a one-way movable flywheel in sequence by a pedal to generate rotation, the design rotation radius of the pedal rotation short link is the same as the rotation radius of a pin of the one-way movable flywheel, then the power is transmitted to the speed-increasing planetary gear set through the one-way movable flywheel to rotate, and finally the power is transmitted to a splined rear axle matched with the speed-increasing planetary gear set to drive a rear hub connected with the speed-increasing planetary gear. Meanwhile, in order to prevent the dislocation and inversion of the parallel transmission long connecting rod in the parallel rotation process of the parallelogram four-connecting-rod transmission mechanism, a dislocation and reverse rotation preventing short connecting rod is arranged between the middle size position of the parallel transmission long connecting rod and the frame, so that the purpose of synchronously outputting power in the same direction through rotation is achieved.
Description
Technical Field
The technical scheme relates to a transmission device in the power transmission process of bicycles, tricycles, electric bicycles and motorcycles, and is particularly suitable for a pedal rod of a bicycle and a transmission part between the output power of an engine of a motorcycle and a driving wheel.
Background
At present, transmission mechanisms between a bicycle pedal rod and a rear wheel and between a motorcycle engine assembly and a driving wheel are basically roller chain transmission, the transmission efficiency is about 0.9, the energy consumption utilization rate is not high during riding, and if the assembly precision between a one-way movable flywheel and a transmission chain is not adjusted in place, the phenomenon of blocking or chain falling can occur during riding. And most of the roller chain links are exposed in the air, and the chain links are easy to rust and the like in rainy and snowy weather for a long time. The storage battery of electric bicycle often takes place the unable phenomenon of starting of electric power inadequately at half way of riding, just will rely on the manpower pedal to trample and ride, and it is less to use roller chain drive to be limited to reasons transmission speed ratios such as assembly space relation originally, and the design choice leeway is little, therefore causes the pedal to trample and make more and more hard, and the speed of riding is slow, if change this technical scheme drive mechanism device with, is favorable to improving this kind of phenomenon by a wide margin. In addition, the structure of the chain transmission is almost unchanged since the chain transmission is used as a transmission part of bicycles and motorcycles, and the chain transmission is not new, although a small number of vehicle types use gear shaft transmission, the gear shaft transmission is limited to be widely popularized and applied due to high processing precision and high assembly requirements of the gear shaft transmission and high relative cost.
Disclosure of Invention
In order to overcome the defect of low transmission efficiency of the existing roller chain transmission mechanism, the technical scheme provides a four-connecting-rod parallel transmission connecting rod mechanism with a brand new structure. The transmission mechanism has the advantages of simple structure, high transmission efficiency almost reaching about 0.99, low energy consumption and the like. The transmission torque can be increased almost infinitely, the energy consumption loss is almost unchanged, and only the mechanism volume is relatively increased.
The transmission principle of the technical scheme is as follows: the parallel transmission link mechanism is a complete set of low-cost transmission mechanism consisting of a parallelogram four-link transmission mechanism and a simple speed-increasing planetary gear set, wherein a frame of a set of bicycles is used as a fixed edge, the pedal rotation short connecting rod, the parallel transmission long connecting rod and the unidirectional movable flywheel form the parallel transmission link mechanism to rotate, the design rotating radius of the pedal rotation short connecting rod is the same as the rotating radius of a unidirectional movable flywheel pin, then the unidirectional movable flywheel transmits power to the speed-increasing planetary gear set to rotate, and finally the power is transmitted to a spline rear shaft matched with the speed-increasing planetary gear set to drive a rear wheel to rotate, so that the purpose of power transmission is achieved. In order to prevent the dislocation and reverse rotation of the long parallel transmission connecting rod during the rotation, a short connecting rod for preventing the dislocation and reverse rotation is arranged between the middle size position of the long parallel transmission connecting rod and the frame, and the rotating radius is the same as that of the short pedal rotation connecting rod and the rotating radius of the flywheel pin on the unidirectional movable flywheel, so that the dislocation and reverse rotation of the long parallel transmission connecting rod during the power transmission process is restrained, and the pedal rotation short connecting rod and the flywheel pin are forced to achieve the purpose of synchronously rotating in the same direction and outputting power.
The technical scheme adopted by the invention for solving the technical problems is as follows: the power of the bicycle link transmission mechanism is that a pedal rod drives a pedal to rotate a short connecting rod, then a parallel transmission long connecting rod is driven to transmit the power to a one-way movable flywheel through a one-way movable flywheel rotation pin, the one-way movable flywheel and the pedal rotation short connecting rod are driven to synchronously rotate in the same direction, the one-way movable flywheel drives 2 planet wheels through an outer gear ring of a speed-increasing planetary gear set (the speed-increasing ratio is temporarily set to be 2.67 according to the conventional design), then the planet wheels drive 1 central sun wheel to rotate, the power is transmitted to a spline rear shaft matched with the central sun wheel, and finally the spline rear shaft drives a rear wheel hub to rotate, so that the purpose of power transmission is achieved. Meanwhile, in order to prevent the parallel transmission long connecting rods from rotating in a staggered mode during rotation, 1 reverse rotation preventing short connecting rod is arranged between the middle position of the parallel transmission long connecting rods and the frame, so that the parallel transmission long connecting rods are restrained from rotating reversely, and finally the purpose of synchronously outputting power in the same direction is achieved.
The invention has the beneficial effects that: the parallel transmission connecting rod transmission mechanism overcomes the defects of low transmission efficiency, easy rustiness, easy chain release and the like of the existing roller chain transmission mechanism, has high transmission efficiency which almost reaches about 0.99, small power loss and large transmission torque, can easily meet the power output transmission requirements of all bicycles, electric bicycles and motorcycles on the market at present, and has the advantages of smooth rotation, no blocking phenomenon, simple and light structure, small number of parts, low cost and the like.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
figure 1 front view of the foot lever in horizontal position.
Fig. 2A-a is a sectional view in the direction of fig. 2A.
Fig. 3B-B is a sectional view in the direction of fig.
Fig. 4C-C are sectional views in the direction of fig.
Fig. 5 a view of the vertical position of the foot bar.
Fig. 6D-D is a sectional view.
The part numbers are as follows:
FIG. 3: (1) and (6) pedaling. (2) A foot pedal rod. (3) The foot pedal rotates the short link. (4) The short link is prevented from rotating in the reverse direction. (5) The long connecting rods are driven in parallel. (6) The flywheel rotates the pin. (7) A one-way movable flywheel. (8) And an inner gear ring of the speed-increasing planetary gear set. (9) The planet wheel of the speed increasing planetary gear set. (10) The sun gear of the speed increasing planetary gear set. (11) A splined rear wheel axle. (12) A rear hub. (13) And a rear wheel frame bearing support. (14) And (4) contracting brakes of the rear wheels. (15) A bicycle frame.
Detailed Description
Firstly, the power transmission process of the parallel transmission link mechanism is as follows:
in fig. 3: foot pedal (1) → foot pedal rod (2) → foot pedal rotation short connecting rod (3) → parallel transmission long connecting rod (5) → flywheel rotation pin (6) → unidirectional movable flywheel (7) → speed increasing planetary gear set inner gear ring (8) → speed increasing planetary gear set planet gear (9) → speed increasing planetary gear set sun gear (10) → spline rear axle (11) → rear hub (12)
In the power transmission process, power drives a pedal rod (2) to rotate through a pedal (1), the pedal rod (2) is tightly connected with a pedal rotating short connecting rod (3), so that the pedal rotating short connecting rod (3) is driven to rotate, the parallel transmission long connecting rod (5) rotates in parallel along the rotating center of the pedal rotating short connecting rod (3), a flywheel rotating pin (6) is driven to rotate along the rotating center of a one-way movable flywheel (7) to drive the one-way movable flywheel (7) to rotate, the one-way movable flywheel (7) is simultaneously connected with an inner gear ring (8) of a speed-increasing planetary gear set, so that the inner gear ring (8) of the speed-increasing planetary gear set is driven to rotate, a speed-increasing planetary gear set (9) and a speed-increasing planetary gear set sun gear (10) which are matched with the flywheel are driven to rotate step by step, and the speed-increasing planetary gear set sun gear, thereby driving the spline rear axle (11) to rotate and finally driving the rear hub (12) connected with the spline rear axle (11) to rotate, and achieving the purpose of outputting power torque.
Secondly, a parallel transmission link mechanism prevents dislocation and reverse rotation limiting measure:
in fig. 3: in order to prevent the dislocation and reverse rotation of the long parallel transmission connecting rod (5) in the power transmission process, 1 short dislocation and reverse rotation preventing connecting rod (4) with the same rotating radius as that of the short pedal rotating connecting rod is arranged between the middle size position of the long parallel transmission connecting rod (5) and the frame, so that the possible dislocation and reverse rotation of the long parallel transmission connecting rod in the parallel rotation process of the parallelogram four-connecting-rod transmission mechanism is prevented, and finally the purpose of synchronously transmitting power in the same direction is achieved.
Claims (3)
1. The parallel transmission link mechanism of the bicycle is structurally characterized in that the pedal rotates a short connecting rod, a parallel transmission long connecting rod, a one-way movable flywheel and a speed-increasing planetary gear set are sequentially connected in a transmission manner: when the power is rotated by the short pedal rotating connecting rod, the parallel transmission long connecting rod is driven to rotate in parallel, then the one-way movable flywheel is driven to rotate by the one-way movable flywheel rotating pin with the rotating radius being the same as that of the short pedal rotating connecting rod, and finally the speed-increasing planetary gear set is driven to rotate to output the power to the spline rear wheel vehicle shaft to drive the rear wheel hub.
2. The bicycle parallel drive linkage as set forth in claim 1, wherein: the outer gear ring of the speed-increasing planetary gear set rotates to drive the planetary gear to rotate, the planetary gear shaft is fixed on a rear wheel frame bearing support, then the planetary gear drives the central sun gear to rotate, power is transmitted to a spline rear wheel axle matched with the central sun gear, and finally the spline rear wheel axle drives the rear wheel hub to rotate, so that the purpose of power transmission is achieved, and the output rotating speed required to be set is obtained.
3. The bicycle parallel drive linkage as set forth in claim 1, wherein: the short connecting rod with the same rotation radius as that of the short pedal rotation connecting rod and capable of preventing dislocation and reverse rotation is arranged between the middle size position of the long parallel transmission connecting rod and the frame, so that dislocation and reverse rotation of the long parallel transmission connecting rod are restrained, and the effect of synchronous power transmission in the same direction is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021440688.2U CN212667595U (en) | 2020-07-18 | 2020-07-18 | Parallel transmission link mechanism for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021440688.2U CN212667595U (en) | 2020-07-18 | 2020-07-18 | Parallel transmission link mechanism for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212667595U true CN212667595U (en) | 2021-03-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021440688.2U Active CN212667595U (en) | 2020-07-18 | 2020-07-18 | Parallel transmission link mechanism for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212667595U (en) |
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2020
- 2020-07-18 CN CN202021440688.2U patent/CN212667595U/en active Active
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