A quick detachable drive system two-in-one bicycle

Abstract

A kind of quick detachable drive system two-in-one bicycle, including main frame and drive system, the front end of the main frame is provided with front frame with front wheel, the main frame is equipped with seat, the rear part of the main frame is provided with rear wheel rotatable around rear wheel axle, the front end of the drive system is detachably connected with main frame, the rear end of the drive system is detachably connected with rear wheel axle, the drive system includes rear freewheel, the rear freewheel is sleeved on freewheel hub connector and fixedly connected, the inner end of the freewheel hub connector is connected with rear wheel axle and is detachably connected by fixing member.The utility model discloses through freewheel hub connector, can use the existing freewheel on market, to reach the purpose that drive system is detachable, and high universality.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle technology, specifically relating to a two-in-one bicycle with a quick-release drive system. Background Technology

[0002] Children's bicycles are an indispensable tool for children's growth. Riding provides experiences of perseverance, balance, independence, and joy. Different stages require different types of bicycles; for example, gliding bicycles and riding bicycles bridge these developmental stages. However, gliding bicycles have a relatively short lifespan, and purchasing one separately is costly. Therefore, 2-in-1 bicycles have emerged on the market. Existing 2-in-1 bicycles suffer from inconvenient disassembly and assembly of their drive systems, requiring specialized tools—meaning a specific tool should be kept at home, increasing costs—and poor reusability and versatility. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this utility model proposes a two-in-one bicycle with a quick-disassembly and assembly drive system. The quick disassembly and assembly of the entire drive system ensures the reliability of the bicycle's function conversion, allowing it to be used as a balance bike or a riding bicycle.

[0004] The technical solution adopted in this utility model is: A two-in-one bicycle with a quick-detachable drive system includes a main frame and a drive system. A front frame with a front wheel is mounted on the front end of the main frame. A seat is located on the main frame. A rear wheel, rotatable around the rear axle, is mounted on the rear end of the main frame. The front end of the drive system is detachably connected to the main frame, and the rear end of the drive system is detachably connected to the rear axle. The drive system includes a rear freewheel, which is fitted onto and fixed to a freewheel hub connector. The inner end of the freewheel hub connector is linked to the rear axle and detachably connected via a fastener. This invention utilizes a freewheel hub connector, allowing the use of commercially available freewheels, thus achieving a detachable drive system and offering high versatility.

[0005] Furthermore, the flywheel hub connector is threadedly connected to the rear flywheel.

[0006] Furthermore, the inner end of the flywheel hub connector is provided with a hexagonal shaft, and the end of the rear wheel axle is provided with a hexagonal countersunk hole. The hexagonal shaft passes through the hexagonal countersunk hole, thereby linking the inner end of the flywheel hub connector with the rear wheel axle.

[0007] Furthermore, the fastener passes through the flywheel hub connector and the rear wheel axle and is then fixed with a nut.

[0008] Furthermore, the fastener is a fixing screw or a quick-release screw.

[0009] Furthermore, the drive system also includes a bottom bracket and a chain. A bottom bracket has a central shaft running through it. The two ends of the central shaft are respectively provided with a left crank and a right crank for mounting pedals. The right crank has a chainring that is driven to rotate by it. The front end of the chain is fitted onto the chainring, and the rear end of the chain is fitted onto the rear freewheel.

[0010] Furthermore, the five-way connector is detachably mounted on the bottom of the center tube of the main frame.

[0011] Furthermore, the chain, chainring, rear freewheel, and freewheel hub connector are all installed inside the chain cover, which is composed of an outer chain cover and an inner chain cover.

[0012] Furthermore, the outer end of the flywheel hub connector is mounted on a bearing seat via a bearing, and the bearing seat is fixed on the chain guard.

[0013] The beneficial effects of this utility model are: 1. The drive system is detachable, allowing it to function as both a gliding and riding bicycle. With the drive system installed, it can be used as a riding bicycle; without it, it can be used as a balance bike.

[0014] 2. The drive system is detachably connected to the rear wheel axle via a separate flywheel hub connector, so that when disassembling the rear of the drive system, only the fixing screws or quick-release screws need to be removed, which is convenient and quick. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the first embodiment of this utility model. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the structure of the first embodiment of this utility model. Figure 2 .

[0017] Figure 3 This is a schematic diagram of the structure of the second embodiment of this utility model. Figure 1 .

[0018] Figure 4 This is a schematic diagram of the structure of the second embodiment of this utility model. Figure 2 .

[0019] Figure 5 This is a structural diagram of the present invention without the driver system installed.

[0020] Figure 6 yes Figure 1 This is a structural diagram of a device with a drive system installed.

[0021] Figure 7This is a schematic diagram of the drive system of this utility model.

[0022] Figure 8 This is an exploded structural diagram of the drive system of this utility model.

[0023] Figure 9 This is a cross-sectional structural diagram of the connection between the drive system and the rear wheel axle of this utility model.

[0024] In the diagram: 1. Main frame; 2. Drive system; 20. Left crank; 21. Bottom bracket; 22. Chain guard inner cover; 23. Bottom bracket; 24. Chain; 25. Chainring; 26. Freewheel hub connector; 261. Hex axle; 27. Rear freewheel; 28. Chain guard outer cover; 29. ​​Bearing; 30. Bearing housing; 31. Right crank; 3. Front frame; 4. Seat; 5. Rear axle; 51. Hex countersunk hole; 6. Rear wheel; 7. Mounting bolt; 8. Quick-release bolt; 9. Nut. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements and equivalents that may be included within the scope of the claims.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] See Figure 1-9 This embodiment provides a bicycle with a quick-release drive system, including a main frame 1 and a drive system 2. The front end of the main frame 1 is equipped with a front frame 3 with a front wheel, and the front frame 3 is also equipped with handlebars. The main frame 1 is equipped with a seat 4, and the rear end of the main frame 1 is equipped with a rear wheel 6 that can rotate around the rear wheel axle 5. The front end of the drive system 2 is detachably connected to the main frame 1, and the rear end of the drive system 2 is detachably connected to the rear wheel axle 5.

[0030] The drive system 2 described in this embodiment includes a rear freewheel 27, which is fitted onto and fixedly connected to a freewheel hub connector 26. The inner end of the freewheel hub connector 26 is linked to the rear wheel axle 5 and detachably connected via a fastener. This invention, through the freewheel hub connector 26, allows the use of commercially available freewheels, thus achieving a detachable drive system and high versatility. Specifically, the freewheel hub connector 26 and the rear freewheel 27 are threaded together. The inner end of the freewheel hub connector 26 is provided with a hexagonal shaft 261, and the end of the rear wheel axle 5 is provided with a hexagonal countersunk hole 51. The hexagonal shaft 261 passes through the hexagonal countersunk hole 51, thereby linking the inner end of the freewheel hub connector 26 with the rear wheel axle 5. Other non-standard assembly methods are also possible.

[0031] In this embodiment, the fastener passes through the flywheel hub connector 26 and the rear wheel axle 5, and is then fixed with the nut 9. See also... Figure 1 , Figure 2In this embodiment, the fixing component is the fixing screw 7, which can be installed and removed using a common screwdriver. See also Figure 3 , Figure 4 In this embodiment, the fastener is a quick-release screw 8, which allows for direct and quick installation and removal. The fastener can be installed on either side of the rear wheel.

[0032] The drive system 2 described in this embodiment also includes a bottom bracket 21 and a chain 24. The bottom bracket 21 is detachably mounted on the bottom of the center tube of the main frame 1 by screws. A bottom bracket 23 is inserted inside the bottom bracket 21. A left crank 20 and a right crank 31 for mounting pedals are respectively provided at both ends of the bottom bracket 23. A chainring 25 driven by the right crank 31 is provided. The front end of the chain 24 is fitted onto the chainring 25, and the rear end of the chain 24 is fitted onto the rear sprocket 27. The chain 24, chainring 25, rear sprocket 27, and sprocket hub connector 26 are all installed inside the chain guard. The chain guard is composed of an outer chain guard cover 28 and an inner chain guard cover 22 that are fastened together. The outer end of the sprocket hub connector 26 is mounted on a bearing seat 30 via a bearing 29. The bearing seat 30 is fixed to the chain guard.

[0033] When the drive system 2 is not installed, this utility model is in self-balancing scooter mode. See [link / reference]. Figure 5 As shown, after installing drive system 2, it is in riding mode. Figure 6 As shown. The bicycle of this utility model is also equipped with a braking system.

[0034] When installing the drive system 2, simply insert the inner end of the flywheel hub connector 26 into the countersunk hole of the rear wheel axle 5, and then secure it with the fixing screw 7 or quick-release screw 8. Alternatively, install the drive system 2 from the side, aligning the bottom bracket 21 with the main frame 1, and then fix the bottom bracket 21 to the center tube of the main frame 1 with screws. For disassembly, first remove the screws connecting the bottom bracket 21 to the main frame 1, then remove the fixing screw 7 or quick-release screw 8, and then remove the drive system 2 from the side outwards.

[0035] The drive system of this invention is detachable, allowing for a two-in-one mode of gliding and riding. With the drive system installed, it can be used as a riding bicycle; without it, it can be used as a balance scooter. The drive system is detachably connected to the rear wheel axle via a separate freewheel hub connector, making disassembly of the rear end of the drive system quick and easy; simply remove the fixing screws or quick-release screws.

Claims

1. A two-in-one bicycle with a quick-detachable drive system, comprising a main frame and a drive system, wherein a front frame with a front wheel is mounted on the front end of the main frame, a seat is provided on the main frame, a rear wheel rotatable around the rear axle is mounted on the rear end of the main frame, the front end of the drive system is detachably connected to the main frame, the rear end of the drive system is detachably connected to the rear axle, and the drive system includes a rear freewheel, characterized in that: The rear freewheel is fitted onto the freewheel hub connector and fixedly connected. The inner end of the freewheel hub connector is linked to the rear wheel axle and is detachably connected via a fastener.

2. The bicycle with a quick-release drive system as described in claim 1, characterized in that: The flywheel hub connector is threaded to the rear flywheel.

3. The bicycle with a quick-release drive system as described in claim 1, characterized in that: The inner end of the flywheel hub connector is provided with a hexagonal shaft, and the end of the rear wheel axle is provided with a hexagonal countersunk hole. The hexagonal shaft passes through the hexagonal countersunk hole, thereby linking the inner end of the flywheel hub connector with the rear wheel axle.

4. The bicycle with a quick-release drive system as described in claim 1, characterized in that: The fastener passes through the flywheel hub connector and the rear wheel axle, and is then fixed with a nut.

5. A two-in-one bicycle with a quick-release drive system according to claim 4, characterized in that: The fastener is a fixing screw or a quick-release screw.

6. A two-in-one bicycle with a quick-release drive system according to claim 1, characterized in that: The drive system also includes a bottom bracket and a chain. A bottom bracket has a central shaft running through it. The two ends of the central shaft are respectively provided with a left crank and a right crank for mounting pedals. The right crank has a chainring that is driven to rotate by it. The front end of the chain is fitted onto the chainring, and the rear end of the chain is fitted onto the rear freewheel.

7. A two-in-one bicycle with a quick-release drive system according to claim 6, characterized in that: The bottom bracket is detachably mounted on the bottom of the center tube of the main frame.

8. A two-in-one bicycle with a quick-release drive system according to claim 6, characterized in that: The chain, chainring, rear freewheel, and freewheel hub connector are all installed inside the chain cover, which is composed of an outer chain cover and an inner chain cover.

9. A two-in-one bicycle with a quick-release drive system according to claim 8, characterized in that: The outer end of the flywheel hub connector is mounted on a bearing seat via a bearing, and the bearing seat is fixed on the chain cover.

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