CN219989436U - hybrid transmission bike - Google Patents

Abstract

The utility model discloses a hybrid transmission bicycle, which aims to provide a vehicle with light and labor-saving riding, smooth speed change, and efficient and fast transmission. It uses a lever to drive the sprocket, multi-link gear and flywheel gear to rotate. The flywheel gear is connected to the flywheel of the rear wheel. The rest is fixed on the rear chainstay of the frame with a support plate. The small sprocket is connected to the multi-link driving gear. Together, the right end of the spline shaft is connected to the multi-link chute transmission gear, the left end is connected to the power output gear, ratchets are provided on both sides of the large sprocket, the left lever combination is connected to the left ratchet of the large sprocket, the right lever is connected to the right ratchet of the large sprocket, and the middle The end is connected to the reciprocating push rod, the large sprocket is connected to the small sprocket through a chain, the multi-link driving gear on the small sprocket engages the multi-link chute speed change gear on the right end of the spline shaft, and the power output gear on the left end engages the rear wheel The flywheel gear, the speed shift fork is connected to the multi-link chute speed change gear, and the shift fork cable is set on the speed shift fork.

Description

hybrid transmission bike

Technical field

The utility model relates to a bicycle that changes the transmission system of an existing bicycle and combines lever transmission, sprocket transmission and gear transmission to achieve common transmission of multiple transmission modes. More specifically, it is a hybrid transmission. bike.

Background technique

At present, most existing bicycles use traditional sprocket chains for transmission, including the transmission, which is also realized by multi-stage sprocket conversion. Although this transmission method is mature and reliable, its disadvantage is that it is laborious to ride. So far, it has not been A labor-saving bicycle appears and mass-produced. Because the crank length of existing bicycles is about 170 mm, the length of the crank arm is the prerequisite for determining whether it saves effort. Driving on a flat road is acceptable, but driving against the wind or on a slope is very difficult. Although the speed can be maintained through the transmission, it is achieved by the frequency of the pedaling crank. High-frequency pedaling requires energy as support. When the length of the crank remains unchanged, any speed change method can reach the desired speed. It does not serve the purpose of saving effort because energy is conserved. In recent years, a variety of new bicycles have appeared, which can attract people's attention, but that is only one of the goals people pursue. The essence of people's pursuit is a bicycle that is light and labor-saving to ride, has smooth speed changes, and is not prone to fatigue. Among the existing bicycles, transmissions produced by Japan's Shimano Company occupy a large share. According to online information, there are more than 600,000 bicycle-related companies in China, and their total profits are not as much as Shimano's alone. Someone must make changes to this abnormal phenomenon.

Utility model content

The purpose of the utility model is to change the transmission structure of the existing bicycle and provide a bicycle with efficient transmission, smooth speed change, light and labor-saving riding, and less fatigue. The transmission system of the existing bicycle includes wheels, frames, cranks, large sprockets, chains, flywheels, etc., but the utility model uses lever-driven sprockets, multi-link gears, and flywheel gears for transmission. The flywheel gears are connected to the rear wheels. On the flywheel, the rest are connected to the chainstay of the frame with support plates. The small sprocket is connected to the multi-link drive gear. The right end of the spline shaft is connected to the multi-link chute speed change gear. The left end is connected to the power output gear. The large sprocket Ratchets are provided on both sides, the left lever combination is connected to the left ratchet of the large sprocket, the right lever is connected to the right ratchet of the large sprocket, and the middle end is connected to the reciprocating push rod. The large sprocket is connected to the small sprocket through a chain. The multi-link driving gear on the small sprocket engages the multi-link chute speed change gear on the right end of the spline shaft. The power output gear on the left end engages the flywheel gear on the rear wheel. The speed dial The fork is connected to the multi-link chute speed change gear. The specific connection is as follows: first, connect the flywheel gear to the flywheel of the rear wheel of the bicycle to form a flywheel assembly, and then use the rear axle screw to connect the rear wheel and the support plate to the frame. There is a rear axle connection hole on the support plate. The axle nut secures the rear wheel and support plate to the frame. Except for the above flywheel gear assembly, which is connected to the rear wheel, the remaining four assemblies are connected to the support plate, in order: 1. Small sprocket assembly: the small sprocket, the multi-link driving gear and the connecting sleeve form a small chain The wheel assembly is connected to the rear end of the support plate with a small sprocket shaft. 2. Spline shaft assembly: The spline shaft, the double chute transmission gear and the power output gear form a spline shaft assembly. The spline shaft can be inserted into the bearing of the bearing seat on the support plate to connect to the center of the support plate. end. 3. Large sprocket assembly: The large sprocket and ratchet form a large sprocket assembly, which is connected to the front end of the support plate with a sprocket shaft. 4. Lever assembly: The lever is divided into left lever and right lever. Let’s talk about the left lever first. Since the transmission system is set on the support plate on the right side, the left lever cannot be directly connected to the transmission system, so the left lever, U-shaped lever, The short lever, lever connecting plate, and central shaft are combined together to form a left lever combination, which can be connected to the transmission system. The right lever can be directly connected to the transmission system because the front end on the right side is connected, the middle end is connected to the reciprocating push rod, and the rear end is connected to the pedal.

Regarding the issue of multi-link driving gears and multi-link chute transmission gears, two or more gears connected together are called multi-link gears, which are similar to existing transmissions in which multiple sprockets are connected together. If the multi-link driving gear has two pieces, the corresponding multi-link chute speed change gear also has two pieces, which can change two speeds, and three pieces, which can change three speeds. This utility model takes two speeds, fast and slow, as an example.

The beneficial effect of this utility model is that riding is light and labor-saving. The up and down pedaling of the lever is more efficient and faster than the 360-degree pedaling of the crank. It borrows the car's transmission method to achieve a smooth and practical transmission effect. This transmission system is suitable for installation on a self-made frame. It can also be transplanted to the existing frame and use existing parts. It has a novel structure, many common parts and is easy to manufacture.

Description of the drawings

Figure 1 is an overall schematic diagram of the transmission mechanism.

Figure 2 is an enlarged schematic diagram of the meshing relationship between the sprocket and the gear and their position on the support plate.

Figure 3 is a schematic diagram of the connection between the transmission system and the lever.

Figure 4 is an enlarged schematic diagram of the engagement relationship of the transmission system.

Figure 5 is a schematic diagram of multi-link gear transmission.

Figure 6 is a schematic diagram of the connection between the left lever combination and the sprocket assembly.

Figure 7 is a schematic diagram of the left lever combination

Figure 8 is a schematic diagram of the small sprocket assembly

Figure 9 is a schematic diagram of the spline shaft assembly

Figure 10 is a schematic diagram of the sliding fit between the spline shaft and the multi-link chute transmission gear.

Figure 11 is a cross-sectional view along line AA of Figure 10

In the picture: support plate 1, small sprocket 2, multi-link driving gear 3, connecting sleeve 4, small sprocket shaft 5, bearing seat 6, spline shaft 7, multi-link chute transmission gear 8, power output gear 9, bearing 10. Flywheel gear 11, large sprocket 12, ratchet 13, large sprocket shaft 14, left lever 15, U-shaped lever 16, short lever 17, lever connecting plate 18, central shaft 19, right lever 20, reciprocating driving gear 21, Reciprocating driven gear 22, shift fork 23, rear axle connection hole 24, chain 25, left lever shaft 26, pedal 27, rear axle screw 28, shift fork cable 29, rear chainstay 30, reciprocating push rod 31.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings:

First, connect the flywheel gear 11 to the flywheel of the rear wheel of the bicycle to form a flywheel gear assembly. Then use the rear axle screw 28 to pass through the rear axle connection hole 24 on the support plate 1, and fasten the rear wheel and the support plate 1 to the rear chainstay 30 of the frame with the rear axle nut, as shown in Figure 1. Except for the above-mentioned flywheel gear assembly, which is connected to the rear wheel, the other four assemblies are connected to the support plate 1. 1. Small sprocket assembly: It is composed of small sprocket 2, multi-link driving gear 3, and connecting sleeve 4. It is connected to the rear end of support plate 1 with small sprocket shaft 5, as shown in Figure 1, Figure 4, and Figure 8. Show. 2. Spline shaft assembly: It is composed of spline shaft 7, multi-link chute transmission gear 8, and power output gear 9. The spline shaft 7 passes through the bearing 10 inside the bearing seat 6 and is connected to the center of the support plate 1. end, as shown in Figure 1 and Figure 4. 3. Large sprocket assembly: It is composed of a large sprocket 12 and a ratchet 13, and is connected to the front end of the support plate 1 with a large sprocket shaft 14, as shown in Figures 2, 4, and 6. Use chain 25 to connect the small sprocket assembly and the large sprocket assembly, as shown in Figures 1, 2, 3, and 4. This forms a large sprocket assembly at the front end, which pulls the small sprocket assembly at the rear end to rotate through the chain 25. The small sprocket assembly engages the spline shaft assembly at the middle end to rotate, and the spline shaft assembly engages the spline shaft assembly at the rear wheel. The flywheel gear assembly rotates and drives the wheels forward, as shown in Figure 1, Figure 2, and Figure 4. 4. Lever assembly: Since the transmission system is connected to the right support plate 1, the left lever 15 cannot be directly connected to it, so the left lever 15, U-shaped lever 16, short lever 17, and lever connecting plate 18 , the central axis 19 are combined together to form a left lever combination, as shown in Figure 7. (The U-shaped lever 16 is connected to both ends of the central axis 19 and forms a U-shape with the central axis, which is called a U-shaped lever, as shown in Figures 6 and 7.) The front end of the short lever 17 in the left lever combination can be connected to the large The ratchet on the left side of the sprocket assembly is shown in Figure 1, Figure 3, and Figure 6. Because the right lever 20 is on the right side, it can be directly connected to the ratchet on the right side of the large sprocket. The middle end is connected to the reciprocating push rod 31, and the front end is connected to the pedal 27, as shown in Figures 1 and 3. The left and right levers also need to reciprocate up and down during operation, so a reciprocating driving gear 21 and a reciprocating passive gear 22 are respectively provided on the central axis 19 and the central axis shell. One end of the reciprocating push rod 31 is connected to the reciprocating driven gear 22, and the other end is connected to the middle end of the right lever 20, as shown in Figures 1 and 3.

The operation process of the lever is: when the left lever combination moves downward, the central shaft 19 starts to rotate, the upper reciprocating driving gear 21 engages the reciprocating passive gear 22, and the push rod 31 pushes the right lever 20 to move upward simultaneously. When the left lever 20 reaches the bottom dead center, the left ratchet disengages, the right lever reaches the top dead center, and the right ratchet begins to engage, driving the transmission system to continue rotating and reciprocating. The rear end of the left lever combination is connected to the rear chainstay 30 with the left lever shaft 26, as shown in Figures 1, 6 and 7.

The general working state is: the lever pushes the large sprocket 12 to drive the small sprocket assembly to rotate through the chain 25. The small sprocket assembly engages the spline shaft assembly to rotate, and the spline shaft assembly engages the flywheel gear assembly to rotate, pushing the bicycle. Forward.

Regarding the speed change problem: the speed change is achieved through the conversion between the multi-link driving gear 3 in the small sprocket assembly and its corresponding multi-link chute speed change gear 8 in the spline shaft assembly. The multi-link chute The speed change gear 8 can slide on the spline shaft 7, and the gears that need to be meshed can be changed at will. In normal times, one gear in the multi-link drive gear 3 meshes with a gear in the multi-link chute speed change gear 8, and the vehicle can always To maintain dynamics, when it is necessary to change speed, use the shift fork cable 29 to pull the shift fork 23, so that the multi-link chute speed change gear 8 is separated from the gear it is engaged with, and engages with another gear to achieve the speed change, as shown in Figure 4, Figure 5. As shown in Figure 9, Figure 10, and Figure 11.

Regarding the issue of the verification vehicle: Whether an invention is feasible is a prerequisite for application, otherwise it will be meaningless. Therefore, a simple verification vehicle was made for verification. For the convenience of production, this verification vehicle has multi-link driving gears and multi-link chute transmission gears. Use a single gear instead, the lever length is 3 times that of the 170mm crank = 510mm, and the reciprocating pedaling stroke refers to the 170mm crank pedaling with a diameter of 340mm. When the 510 mm lever is pushed down 340 mm, it can drive the large sprocket with 36 teeth to rotate one-sixth of a turn, which is 6 teeth. The small sprocket with 12 teeth can be pulled through the chain to rotate half a circle, which is equal to 6 teeth. The 30 teeth of the single-piece driving gear fixed together with the small sprocket can also rotate half a circle synchronously, and then the single-piece chute transmission gear with 15 teeth on the spline shaft can rotate one circle, 50 teeth on the same shaft. The power output gear of the teeth also rotates one circle synchronously. The flywheel gear with 25 teeth can push the wheel to rotate forward for 2 circles, and one reciprocation can rotate 4 circles. If the traditional crank method is used, taking 36 large sprockets and 12 small sprockets as an example, pedaling 360 degrees can rotate 3 times. Although the verification process only uses one rear wheel and one frame to install the transmission system and does it indoors without going on the road, the results can still be seen. When testing on the indoor floor, holding down the frame and pedaling the traditional crank, The wheels cannot rotate. When the pedal lever is replaced, the wheels can rub against the floor and rotate. The hybrid transmission can achieve the purpose of labor saving and conform to the law of conservation of energy. Photos can be provided as reference if necessary and will not be used as application documents.

The utility model can make a complete bicycle with self-made parts, or make a self-made transmission system. The remaining common parts of existing bicycles can also be regarded as an independent bicycle.

Claims (5)

1. A hybrid transmission bicycle, including wheels, a frame, a large sprocket, a flywheel, a chain, and a crank. It is characterized by using a lever to drive the sprocket, a multi-link gear, and a flywheel gear for transmission. The flywheel gear is connected to the flywheel of the rear wheel. on the top, the rest are connected to the frame with support plates, the small sprocket is connected to the multi-link driving gear, the right end of the spline shaft is connected to the multi-link chute speed change gear, the left end is connected to the power output gear, and ratchets are set on both sides of the large sprocket. The left lever combination is connected to the left ratchet of the large sprocket, the right lever is connected to the right ratchet of the large sprocket, the middle end is connected to the reciprocating push rod, the large sprocket is connected to the small sprocket through a chain, and the multi-link driving gear on the small sprocket The multi-link chute speed change gear on the right end of the spline shaft engages, the power output gear on the left end engages the flywheel gear on the rear wheel, and the speed shift fork is connected to the multi-link chute speed change gear. 2. The hybrid transmission bicycle according to claim 1, characterized in that the central shaft in the left lever combination is connected to a reciprocating driving gear. 3. The hybrid transmission bicycle according to claim 1, characterized in that the front end of the reciprocating push rod is provided with a reciprocating driven gear. 4. The hybrid transmission bicycle according to claim 1, characterized in that pedals are provided at the front ends of the left lever combination and the right lever. 5. The hybrid transmission bicycle according to claim 1, characterized in that the shift fork is provided with a shift fork cable.