Bicycle chain cover and bicycle

Abstract

The utility model discloses a bicycle chain cover and a bicycle and belongs to the technical field of bicycles, the bicycle chain cover is of a split structure and comprises a first cover shell, a second cover shell and a middle connecting plate, and the middle connecting plate serves as a middle supporting structure of the first cover shell and the second cover shell and is fixed between a chain wheel and a flywheel on a bicycle frame; the first cover shell and the second cover shell can form a cover shell body in which the transmission system can be sleeved after being butted through a locking piece, and can be connected with the middle connecting plate through a clamping piece; therefore, the bicycle chain cover is simple in structure, easy to disassemble and assemble, free of interference of a bicycle frame and free of additional disassembling and assembling tools, use flexibility and convenience are improved, the whole transmission system is wrapped in the chain cover, the transmission system can be protected, meanwhile, other foreign matter or children fingers and the like are prevented from being wound into a chain, and the service life of the chain cover is prolonged. The attractiveness of a bicycle product is improved, the use safety of the bicycle product is also improved, and certain market value and economic benefits are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycles, and particularly relates to a bicycle chain guard and a bicycle. Background Art

[0002] Most of the existing traditional bicycle chain guards only cover the outside and partial inside of the transmission part. For the overall covering of the inside of the chain and the flywheel, most models in the industry do not cover it. On the one hand, this reduces the protection of the bicycle transmission system, and on the other hand, it reduces the safety of bicycle use, especially for children's bicycles. As a product used by children in the age range of 3 - 8 years old, it is not only a means of transportation, but also more of a toy function. Therefore, the safety of the product is even more important. If a child plays with a children's bicycle that does not fully cover the transmission system, it is very likely to get fingers or other foreign objects caught in the gears, causing personal injury or other hazards.

[0003] In response to this, there are currently some bicycles on the market that use fully covered chain guards. When installing this type of chain guard, it usually needs to be sleeved with the transmission system partially or integrally and then installed on the frame. That is, the chain guard and the transmission system are an integral structure. During disassembly and assembly, in addition to using special disassembly and assembly tools, the frame even needs to be disassembled and connected to remove the chain guard. Therefore, there is a problem that it is not easy to disassemble and assemble, which affects the normal maintenance and replacement of the bicycle transmission system.

[0004] Based on the above analysis, this application designs a bicycle chain guard and a bicycle. Summary of the Invention

[0005] The purpose of the utility model is to provide a bicycle chain guard and a bicycle to solve the problem that the existing bicycle chain guard is not easy to disassemble and assemble.

[0006] To solve the above problems, this application provides a bicycle chain guard, which includes a first cover shell, a second cover shell and an intermediate connecting plate with a split design. Locking parts are provided on the first cover shell and the second cover shell to lock the two. At the same time, avoidance grooves for avoiding the bottom bracket of the bicycle frame and the flywheel shaft are respectively provided at corresponding positions on the opposite sides of the first cover shell and the second cover shell. The length of the intermediate connecting plate is slightly less than the lengths of the first cover shell and the second cover shell. Fixing parts for fixing it on the bicycle frame are provided on the plate surface of the intermediate connecting plate. At the same time, clamping parts that can be buckled with the first cover shell and the second cover shell are provided on the outer periphery of the intermediate connecting plate.

[0007] As a preferred solution of the present application: the fixing part includes a mounting hole and a socket hole, and at the same time, the thickness of one side surface of the intermediate connecting plate is distributed in two steps along the length direction, wherein the thickness of the intermediate connecting plate near the flywheel end is greater than the thickness near the five-way bracket of the frame; the socket hole is arranged at the end of the intermediate connecting plate near the five-way bracket of the frame, and the socket hole can be socketed on the five-way bracket of the frame to fix one end of the intermediate connecting plate, and the mounting hole is arranged at the end of the intermediate connecting plate near the flywheel, and the other end of the intermediate connecting plate can be fixed by using the mounting hole.

[0008] As a preferred solution of the present application: an end surface of the intermediate connecting plate close to the flywheel is an arc-shaped groove, and the curvature of the arc-shaped groove corresponds to the curvature of the flywheel.

[0009] As a preferred solution of the present application: the locking member includes a docking member and / or a locking member, the docking member is a block and a slot respectively arranged on the opposite surfaces of the first cover shell and the second cover shell, and the locking member is a lock hole and a locking block respectively arranged at corresponding positions at the ends of the first cover shell and the second cover shell.

[0010] As a preferred solution of the present application: the lock hole is arranged on the side wall of the cover shell and is a hole passing through the cover shell; the locking block is arranged at the end of the cover shell, which includes a connecting rod and a protrusion. When the first cover shell and the second cover shell are docked, the connecting rod can drive the protrusion to enter the cover shell on the opposite side and lock it with the hole. Pressing the protrusion can make it detach from the hole under the action of the connecting rod.

[0011] As a preferred solution of the present application: the structures of the first cover shell and the second cover shell are symmetrical, and after the first cover shell and the second cover shell are connected, a cover shell body with a central hollow that can wrap the transmission mechanism is formed.

[0012] As a preferred solution of the present application: the intermediate connecting plate is provided with a weight-reducing hole corresponding to the central hollowed-out portion of the cover shell.

[0013] As a preferred solution of the present application: the outer contours of the cover shell and the intermediate connecting plate are both cam-shaped corresponding to the chain winding shape on the bicycle.

[0014] The present application also provides a bicycle, comprising a frame, on which the above-mentioned bicycle chain cover is mounted.

[0015] Compared with the prior art, the advantages of this application are:

[0016] The bicycle chain guard adopted in this application has a split structure, which includes a first housing, a second housing, and an intermediate connecting plate disposed between the two housings. The intermediate connecting plate serves as an intermediate support structure for the first housing and the second housing, and is fixed between the sprocket and the flywheel on the frame. The first housing and the second housing have symmetrical structures. After being butted against each other, they can form a housing body capable of sleeving the transmission system therein, and can be connected to the intermediate connecting plate through a clamping member to realize the support and fixation of the housing body on the frame. That is to say, the bicycle chain guard of this application is an independent structure relative to the bicycle transmission system. At the same time, both the first housing and the second housing are movable housings, and the two housings can be quickly disassembled and assembled through a locking member without the need for additional disassembly and assembly tools. Moreover, during the disassembly and assembly process, only the housing needs to be moved without being interfered by the frame. It can be seen that the bicycle chain guard of this application not only has a simple structure, but also is easy to disassemble and assemble, is not interfered by the frame, and does not require additional disassembly and assembly tools, improving the flexibility and convenience of use. Moreover, the chain guard wraps the entire transmission system therein, so that while protecting the transmission system, it can prevent other foreign objects or children's fingers from being caught in the chain, improving the aesthetic degree of the bicycle product and also enhancing its use safety, meeting the market needs, and having certain market value and economic benefits. Brief Description of the Drawings

[0017] Figure 1 is an exploded structural schematic diagram of the bicycle chain guard provided by the present utility model.

[0018] Figure 2 provided by the present utility model Figure 1 is a partial enlarged schematic diagram at B in

[0019] Figure 3 is a front view structural schematic diagram of the bicycle chain guard provided by the present utility model.

[0020] Figure 4 provided by the present utility model Figure 3 is a partial enlarged schematic diagram at A in

[0021] Figure 5 is a usage state diagram of the bicycle chain guard provided by the present utility model.

[0022] Figure 6 is a top view structural schematic diagram of the intermediate connecting plate provided by the present utility model.

[0023] Figure 7 is a sectional structural schematic diagram with the inner wall of the lock hole processed into an arc provided by the present utility model.

[0024] Figure 8 is an overall structural schematic diagram of a bicycle provided by the present utility model.

[0025] Reference Signs

[0026] 1 is the first housing, 2 is the second housing, 3 is the intermediate connecting plate, 4 is the relief groove, 5 is the clamping member, 6 is the mounting hole, 7 is the socket hole, 8 is the arc-shaped groove, 9 is the card slot, 10 is the card block, 11 is the lock hole, 12 is the locking block, 121 is the convex block, 122 is the connecting rod, 13 is the weight-reducing hole, 14 is the vehicle frame, and 15 is the housing body. Specific embodiments

[0027] The present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0028] This embodiment provides a bicycle chain guard, as Figure 1 shown. The chain guard includes a first housing 1, a second housing 2, and an intermediate connecting plate 3 that are designed separately. The first housing 1 and the second housing 2 are provided with locking members for locking the two. At the same time, relief grooves 4 for avoiding the bottom bracket and the flywheel shaft of the bicycle frame are respectively provided at corresponding positions on the opposite sides of the first housing 1 and the second housing 2. In this embodiment, the structures of the first housing 1 and the second housing 2 are symmetrical. After the first housing 1 and the second housing 2 are butted, they form a housing body 15 with a central hollow and capable of wrapping the transmission system therein, as Figure 5 shown. The central hollow design can reduce the weight of the housing body 15. At the same time, after the first housing 1 and the second housing 2 are butted, the relief grooves 4 thereon form a relief hole capable of avoiding the bottom bracket and the flywheel shaft of the vehicle frame, as Figure 3As shown, it can be understood that the size of the avoidance hole should be slightly larger than the size of the corresponding frame five-way or flywheel shaft, so as to ensure the normal use of the frame five-way and flywheel; the length of the middle connecting plate 3 is slightly smaller than the length of the first cover shell 1 and the second cover shell 2, so as to ensure that the middle connecting plate 3 is wrapped therein after the first cover shell 1 and the second cover shell 2 are connected, thereby improving the aesthetics of the chain cover outer tube, and the middle connecting plate 3 serves as an intermediate fixing structure between the first cover shell 1 and the second cover shell 2, and a fixing part for fixing it to the bicycle frame 14 is provided on its plate surface. At the same time, the outer periphery of the middle connecting plate 3 is provided with a clamping part 5 that can be buckled with the first cover shell 1 and the second cover shell 2. It can be understood that the thickness of the middle connecting plate 3 should be slightly larger than the width of the bicycle chain, and the chain of the bicycle should be arranged around the outer periphery of the center connecting plate, so as to ensure that the cover and the center After the intermediate connecting plate 3 is engaged, the chain is located in the cover shell; it can be seen that, among the various components of the chain cover in this embodiment, only the intermediate connecting plate 3 is fixed to the frame 14 by the fixing parts, and the first cover shell 1 and the second cover shell 2 are both movable shells. During installation, after the bicycle frame 14 is assembled, the intermediate connecting plate 3 is fixed to the frame 14 between the sprocket and the flywheel by the fixing parts, and then the first cover shell 1 and the second cover shell 2 are relatively moved to make them close until they are plugged and locked by the locking parts. At this time, the transmission system of the bicycle and the intermediate connecting plate 3 are covered in the cover shell 15 formed by the first cover shell 1 and the second cover shell 2. During disassembly, the first cover shell 1 and the second cover shell 2 can be separated by only pulling the first cover shell 1 or the second cover shell 2 to overcome the plugging force of the locking parts. At this time, the transmission system of the bicycle is exposed, and the transmission system can be maintained and replaced as needed.

[0029] In summary, it can be seen that the bicycle chain cover of the present embodiment is an independent structure relative to the bicycle transmission system. At the same time, the first cover shell 1 and the second cover shell 2 are both movable shells, and the two cover shells can be quickly disassembled and assembled through the locking parts without the need for additional disassembly and assembly tools. Moreover, during the disassembly and assembly process, it is only necessary to move the cover shells without being interfered by the frame 14, thereby improving the flexibility and convenience of using the chain cover. Moreover, the chain cover wraps the entire transmission system therein, which can protect the transmission system while preventing other foreign objects or children's fingers from being involved in the chain, thereby improving the safety of using the transmission system.

[0030] In this embodiment, in order to prevent the middle connecting plate 3 from affecting the normal use of the transmission system, the specific structure of the middle connecting plate 3 in this embodiment includes: the thickness of one side of the middle connecting plate 3 is distributed in two steps along the length direction, wherein the thickness of the middle connecting plate 3 near the flywheel end is greater than the thickness near the frame five-way end, such as Figure 6As shown, at the same time, the fixing member provided on the intermediate connecting plate 3 includes a mounting hole 6 and a socket hole 7. The socket hole 7 is provided at one end of the intermediate connecting plate 3 close to the bottom bracket of the frame, that is, at one end of the intermediate connecting plate 3 with a smaller thickness. The socket hole 7 can be sleeved on the bottom bracket of the frame to fix one end of the intermediate connecting plate 3. The mounting hole 6 is provided at one end of the intermediate connecting plate 3 close to the flywheel. The other end of the intermediate connecting plate 3 can be fixed by using the mounting hole 6. In this embodiment, the mounting hole 6 is preferably a threaded hole, and one end of the intermediate connecting plate 3 is fixed to the frame 14 by a bolt.

[0031] In this embodiment, the purpose of setting one side of the intermediate connecting plate 3 with a thickness difference is to ensure that while each cover is tightly clamped with the intermediate connecting plate 3, the normal use of the sprocket is not affected by the intermediate connecting plate 3. That is, the existence of the thickness difference is conducive to forming an avoidance area at one end of the intermediate connecting plate 3 close to the sprocket, and this avoidance area can solve the problem that the intermediate connecting plate 3 interferes with the normal use of the sprocket.

[0032] In this embodiment, one end face of the intermediate connecting plate 3 close to the flywheel is an arc-shaped groove 8, as Figure 6 shown. The curvature of the arc-shaped groove 8 corresponds to the curvature of the flywheel. That is, one end of the intermediate connecting plate 3 close to the flywheel is not sleeved on the flywheel shaft, but only close to the flywheel shaft. In this way, on the one hand, it is beneficial to the fixation of the first cover 1 and the second cover 2, and on the other hand, it is convenient for the design and installation of the intermediate connecting plate 3.

[0033] In this embodiment, the locking member includes a docking member and a locking fastener, as Figure 1 shown in Fig. 1 or Fig. 2. Among them, the docking member is a clamping block 10 and a clamping groove 9 respectively provided on the opposite faces of the first cover 1 and the second cover 2, and the locking fastener is a locking hole 11 and a locking block 12 respectively provided at the corresponding positions at the ends of the first cover 1 and the second cover 2; it can be understood that the clamping groove 9 and the clamping block 10, as well as the locking hole 11 and the locking block 12, can be interchangeably arranged on the first cover 1 and the second cover 2 without specific limitation.

[0034] In this embodiment, it is preferably that the docking member is the clamping block 10 provided on the first cover 1 and the clamping groove 9 provided on the second cover 2. Among them, the clamping block 10 is a protrusion provided on the docking face of the first cover 1, and the clamping groove 9 is a sunken groove provided on the docking face of the second cover 2. After the two covers are docked, the protrusion can be snapped into the clamping groove 9. Through the docking of the clamping block 10 and the clamping groove 9, the docking of the two cover bodies 15 is realized.

[0035] In this embodiment, the preferred locking member is a lock hole 11 arranged on the first housing 1, and a locking block 12 arranged on the second housing 2. The lock hole 11 is arranged on the side wall of the first housing 1 and is an orifice penetrating the first housing 1. The locking block 12 is arranged at the end of the second housing 2, and includes a connecting rod 122 and a protrusion 121. When the first housing 1 and the second housing 2 are docked, the connecting rod 122 can drive the protrusion 121 to enter the housing on the opposite side and lock it with the orifice. Pressing the protrusion 121 can cause it to detach from the orifice under the action of the connecting rod 122. Figure 4 As shown; it can be seen that in this embodiment, the locking member is a switch member, and the first cover shell 1 and the second cover shell 2 can be connected and separated under the action of external force by engaging or disengaging the protrusion 121 with the hole.

[0036] In this embodiment, in order to ensure that the protrusion 121 can be effectively engaged with and separated from the hole, it is preferred to make the edge of the protrusion 121 and the inner wall of the hole into a rounded shape, such as Figure 7 shown.

[0037] In this embodiment, the structures of the first cover shell 1 and the second cover shell 2 are symmetrical. After the first cover shell 1 and the second cover shell 2 are connected, a cover shell 15 with a central hollow portion that can wrap the transmission mechanism is formed. A weight reduction hole 13 corresponding to the central hollow portion of the cover shell 15 is provided on the middle connecting plate 3. Figure 1 shown.

[0038] In this embodiment, the outer contours of the cover shell 15 and the intermediate connecting plate 3 are both cam-shaped corresponding to the chain winding shape on the bicycle; of course, it can also be other shapes such as square. The use of a cam shape is conducive to reducing the volume of the chain cover and making it compatible with the transmission system structure.

[0039] The present application also provides a bicycle, which includes a frame 14, and the chain cover described in the above embodiment is installed on the frame 14, such as Figure 8 shown.

[0040] Installing the chain cover of the above embodiment on a bicycle not only improves the aesthetics of the bicycle product, but also improves its safety in use, meets market needs, and has certain market value and economic benefits.

[0041] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several improvements can be made without departing from the premise of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A bicycle chain cover, characterized in that: The invention comprises a first cover shell (1), a second cover shell (2) and an intermediate connecting plate (3) of split design, wherein the first cover shell (1) and the second cover shell (2) are provided with locking parts for locking the two, and at the same time, corresponding positions on the opposite sides of the first cover shell (1) and the second cover shell (2) are respectively provided with avoidance grooves (4) for avoiding the five-way bracket and the flywheel shaft of the bicycle frame; the length of the intermediate connecting plate (3) is shorter than the length of the first cover shell (1) and the second cover shell (2), and a fixing part for fixing it to the bicycle frame (14) is provided on the plate surface of the intermediate connecting plate (3), and at the same time, a clamping part (5) capable of being buckled with the first cover shell (1) and the second cover shell (2) is provided on the outer periphery of the intermediate connecting plate (3).

2. The bicycle chain cover according to claim 1, characterized in that: The fixing member comprises a mounting hole (6) and a sleeve hole (7); at the same time, the thickness of one side surface of the intermediate connecting plate (3) is distributed in a two-step manner along the length direction, wherein the thickness of the intermediate connecting plate (3) at one end close to the flywheel is greater than the thickness at one end close to the frame five-way bracket; the sleeve hole (7) is arranged at one end of the intermediate connecting plate (3) close to the frame five-way bracket, and the sleeve hole (7) can be sleeved on the frame five-way bracket to fix one end of the intermediate connecting plate (3); the mounting hole (6) is arranged at one end of the intermediate connecting plate (3) close to the flywheel, and the other end of the intermediate connecting plate (3) can be fixed by using the mounting hole (6).

3. The bicycle chain cover according to claim 2, characterized in that: An end surface of the intermediate connecting plate (3) close to the flywheel is an arc-shaped groove (8), and the curvature of the arc-shaped groove (8) corresponds to the curvature of the flywheel.

4. The bicycle chain guard according to claim 1, characterized in that: The locking member comprises a docking member and / or a locking member, wherein the docking member is a card block (10) and a card slot (9) arranged on opposite surfaces of the first cover shell (1) and the second cover shell (2), and the locking member is a locking hole (11) and a locking block (12) arranged at corresponding positions of the ends of the first cover shell (1) and the second cover shell (2).

5. The bicycle chain guard according to claim 4, characterized in that: The locking hole (11) is arranged on the side wall of the housing and is an orifice that passes through the housing; the locking block (12) is arranged at the end of the housing and comprises a connecting rod (122) and a protrusion (121); when the first housing (1) and the second housing (2) are docked, the connecting rod (122) can drive the protrusion (121) to enter the housing on the opposite side and be locked with the orifice; the protrusion (121) can be pressed to disengage from the orifice under the action of the connecting rod (122).

6. The bicycle chain guard according to claim 1, characterized in that: The first cover shell (1) and the second cover shell (2) are symmetrical in structure; after being butted together, the first cover shell (1) and the second cover shell (2) form a cover shell body (15) with a hollow center that can enclose the transmission mechanism.

7. The bicycle chain guard according to claim 6, characterized in that: The intermediate connecting plate (3) is provided with a weight-reducing hole (13) corresponding to the central hollowed-out portion of the cover shell (15).

8. The bicycle chain guard according to claim 6, characterized in that: The outer contours of the cover shell (15) and the intermediate connecting plate (3) are both cam-shaped corresponding to the winding shape of the chain on the bicycle.

9. A bicycle, comprising a frame (14), characterized in that: The bicycle frame (14) is mounted with a bicycle chain cover as claimed in any one of claims 1 to 8.

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