Chain falling prevention device for intelligent electric bicycle

Abstract

The utility model discloses a chain falling prevention device for an intelligent electric bicycle, the intelligent electric bicycle is provided with a chain wheel and a chain wound on the chain wheel and used for transmission, and the chain falling prevention device is characterized by comprising a limiting block and an extension sleeve, the triangular locking part is located at the upper end of the chain, the blocking piece part extends downwards from the inner side of the triangular locking part, the blocking piece part is located on the inner side of the chain, and the spacing distance is smaller than the width of the chain; a locking hole is formed in the center of the triangular locking part, and the locking hole is fixed to a frame through a locking bolt; wherein the extension sleeve is installed on the inner side of the locking hole and used for abutting against the frame. The locking bolt is installed through the locking hole of the triangular locking part, the triangular locking part is fixed to the frame tube, the chain is limited in cooperation with the blocking piece part at the bottom, the anti-falling design of the upper end and the side face is formed, the extension sleeve assists in assembly, the structure is simple, and installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of intelligent electric bicycle accessories, concretely relates to a chain falling prevention device for intelligent electric bicycle. BACKGROUND

[0002] The transmission device is widely used in the field of chain type intelligent electric bicycle, is used for driving device and power transmission of rear wheel, and the chain is completely in exposed state in the riding process, is directly affected by the environment in various environments, if the chain use condition is not good, not only the service life of the chain, the sprocket and the derailleur is affected, but also the feeling of riding is affected due to the chain not enough smooth. The chain in the prior art is prone to loosening and falling off due to bumping when driving on the road because of the exposed design. In order to prevent the above-mentioned situation, the bicycle is generally provided with a chain falling prevention device. The chain falling prevention device in the prior art is provided in the form of a chain cover, that is, a cover-shaped chain cover covers the chain part on the upper side of the sprocket, which is extremely inconvenient for maintenance, and the chain cover itself has a large covering area and is easy to be damaged by bumping.

[0003] Therefore, there is an urgent need for a chain falling prevention device for intelligent electric bicycle, which is convenient to assemble, low in cost, simple in structure and convenient to use. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides a chain falling prevention device for intelligent electric bicycle, which avoids the trouble that the chain falls off from the sprocket due to bumping during road driving.

[0005] In order to solve the above technical problem, the utility model discloses a chain falling prevention device for intelligent electric bicycle, the intelligent electric bicycle has a sprocket and a chain wound on the sprocket for transmission, and comprises:

[0006] The limiting block is located on the upper side of the sprocket and has a triangular locking portion located on the upper end of the chain and a baffle portion extending downward from the inner side of the triangular locking portion, the baffle portion is located on the inner side of the chain and the interval distance is less than the width of the chain; the triangular locking portion has a locking hole in the center, and the locking hole is fixed to the frame by a locking bolt;

[0007] The extension sleeve is installed on the inner side of the locking hole and is used for abutting against the frame.

[0008] According to one embodiment of the utility model, the lower end of the baffle portion has an inner concave radius.

[0009] According to one embodiment of the utility model, the inner and outer sides of the locking hole are provided with counterbores, the extension sleeve is connected to the inner side of the locking hole by threads, and the locking bolt is arranged through the extension sleeve.

[0010] According to the utility model one embodiment, the extension sleeve has a rubber pad that presses against the bicycle frame.

[0011] According to the utility model one embodiment, the extension sleeve and the limiting block are made of plastic.

[0012] Compared with the prior art, the utility model can obtain the following technical effects:

[0013] The locking bolt is installed through the locking hole of the triangular locking part, is fixed to the frame tube, cooperates with the limiting chain of the bottom baffle part, forms the anti-falling design of the upper end and the side surface, the extension sleeve assists assembly, and the structure is simple and convenient to install.

[0014] Of course, any product implementing the utility model does not necessarily need to simultaneously achieve all the technical effects described above. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the utility model, constitute a part of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0016] Figure 1 is a perspective view of the anti-falling chain device for the intelligent electric bicycle according to the embodiment of the utility model;

[0017] Figure 2 is a side view of the anti-falling chain device for the intelligent electric bicycle according to the embodiment of the utility model.

[0018] DRAWINGS

[0019] The limiting block 10, the extension sleeve 20, the triangular locking part 30, the baffle part 40, the locking hole 50, and the rubber pad 60. DETAILED DESCRIPTION

[0020] The embodiments of the utility model will be described in detail below with reference to the drawings and the embodiments, so that the realization process of how the utility model applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented.

[0021] Please refer to Figure 1 and Figure 2 , Figure 1 is a perspective view of the anti-falling chain device for the intelligent electric bicycle according to the embodiment of the utility model; Figure 2 is a side view of the anti-falling chain device for the intelligent electric bicycle according to the embodiment of the utility model.

[0022] As shown in the figure, a device for preventing chain from falling off for a smart electric bicycle, the smart electric bicycle has a sprocket and a chain wound on the sprocket for transmission, comprising: a limiting block 10 and an extension sleeve 20, the limiting block 10 is located on the upper side of the sprocket, and has a triangular locking portion 30 located at the upper end of the chain and a baffle portion 40 extending downward from the inner side of the triangular locking portion 30, the baffle portion 40 is located on the inner side of the chain, and the interval distance is less than the width of the chain; the triangular locking portion 40 has a locking hole 50 in the center, and the locking hole 50 is fixed to the frame by a locking bolt; wherein the extension sleeve 20 is installed on the inner side of the locking hole 50 for abutting to the frame.

[0023] In an embodiment of the utility model, the device for preventing chain from falling off comprises a limiting block 10 and an extension sleeve 20, which are fixedly arranged on the upper end of the sprocket chain, and prevent the meshing part from loosening and falling off. Specifically, the limiting block 10 is composed of a triangular locking portion 30 and a baffle portion 40, which are triangular and have good stability. The triangular locking portion 30 has a locking hole 50 for installing a locking bolt and being fixed to the frame tube, thereby forming stability. The baffle portion 40 is located on the side of the chain and forms a falling prevention stop. The interval distance between the baffle portion 40 and the chain is controlled to be less than the width of the chain. The extension sleeve 20 can be adapted to the length of the vehicle type, so as to adjust the interval between the baffle portion 40 and the chain, thereby facilitating assembly and being simple and practical.

[0024] In a preferred embodiment, the baffle portion 40 has an inner concave arc at the lower end, which is suitable for the design of a circular sprocket.

[0025] In addition, the locking hole 50 is provided with a countersunk hole on the inner and outer sides, that is, the hole diameter of the middle section is smaller than that of the two ends. One of the hole diameters of the two ends is convenient for installing the locking bolt, and the other is convenient for installing the extension sleeve 20. The extension sleeve 20 is connected to the inner side of the locking hole 50 through threads and is provided with a locking bolt, thereby completing assembly with the frame tube and being convenient and simple.

[0026] In addition, the extension sleeve 20 has a rubber pad 60 for abutting to the frame, which is flexible and can strengthen the transition of the edge.

[0027] The limiting block 10 and the extension sleeve 20 are made of plastic, which is low in cost and high in practicability.

[0028] In summary, the locking bolt is installed in the locking hole 50 of the triangular locking portion 30 and is fixed to the frame tube, the baffle portion 40 at the bottom limits the chain, the upper end and the side are provided with falling prevention designs, the extension sleeve 20 is used for auxiliary assembly, the structure is simple, and the installation is convenient.

[0029] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A chain drop prevention device for a smart electric bicycle having a sprocket and a chain wound around the sprocket for transmission, characterized in that, The application relates to a limiting block and an extension sleeve. The limiting block is arranged on the upper side of the tooth disc and has a triangular locking part arranged on the upper end of the chain and a baffle part extending downward from the inner side of the triangular locking part, the baffle part is arranged on the inner side of the chain and the interval distance is smaller than the width of the chain; the center of the triangular locking part is provided with a locking hole which is fixed to the vehicle frame through a locking bolt; The extension sleeve is arranged on the inner side of the locking hole and is used for abutting against the vehicle frame.

2. The chain drop out prevention device for a smart power assisted bicycle of claim 1, wherein, The lower end of the baffle part is provided with an inner concave arc.

3. The chain drop out prevention device for a smart power assisted bicycle of claim 1, wherein, The inner and outer sides of the locking hole are provided with counterbores, the extension sleeve is connected with the inner side of the locking hole through threads and penetrates the locking bolt.

4. The chain drop out prevention device for a smart power assisted bicycle of claim 1, wherein, The extension sleeve is provided with a rubber pad for abutting against the vehicle frame.

5. The chain drop out prevention device for a smart power assisted bicycle of claim 1, wherein, The limiting block and the extension sleeve are made of plastic.

Images