Bicycle frame with stable structure

Abstract

The utility model relates to the technical field of bicycles, and discloses a bicycle frame with a stable structure, which comprises a head tube and a middle tube, a crank support shell is arranged at the center of the lower end surface of the middle tube, rear lower forks are arranged at the front and rear parts of the center of one side of the crank support shell, and a firm shell is arranged at the center of the outer sides of the head tube and the middle tube. Fixing devices are arranged on the upper portions and the lower portions of the centers of the outer sides of the two firm shells, a lower pipe is fixedly connected to the center between the two fixing devices on the lower portion, an upper pipe is fixedly connected to the center between the two fixing devices on the upper portion, and the center of the outer side of the upper end of the upper pipe is sleeved with a protection device. According to the bicycle frame, the requirement for the detachability of the lower pipe and the upper pipe is met through the fixing device, a user can conveniently and rapidly assemble, disassemble, maintain and replace the bicycle frame, the user can rapidly replace a damaged or outdated part, the whole bicycle frame is prevented from being replaced, the damage cost is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a bicycle frame with stable structure. Background Technique

[0002] A bicycle is a two-wheeled human-powered vehicle that is widely used worldwide as a daily commuting tool. It is not only an environmentally friendly way of traveling but also a healthy form of exercise suitable for people of all ages. The bicycle frame is the core part of the bicycle, which supports the entire weight of the bicycle and bears various forces during riding.

[0003] When the current bicycle frames are in use, it is not easy to quickly disassemble, install, repair, and replace the frames. Moreover, when parts of the frame are damaged or out of date, it is difficult to disassemble and replace them, resulting in the need to replace the entire frame, thus increasing the cost and reducing the service life. During the use of the bicycle frame, in case of an emergency, the top tube is likely to cause scratching and injury to the user, thereby reducing the user experience and comfort. Therefore, those skilled in the art have provided a bicycle frame with stable structure to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a bicycle frame with stable structure is proposed. Through the setting of the fixing device, the detachable property of the down tube and the top tube is satisfied, which facilitates the user to quickly disassemble, install, repair, and replace it. Moreover, it enables the user to quickly replace the damaged or out-of-date parts, avoiding replacing the entire frame, thus reducing the damage cost and increasing the service life. Then, through the setting of the protection device, it effectively alleviates the scratching and injury of the top tube to the user during use or in case of an emergency, thereby improving the user experience and comfort, and can be quickly disassembled to facilitate the user to replace and clean. Finally, through the setting of the sturdy shell, it can provide additional structural support for the frame, increase the strength of some parts of the frame, and can increase its anti-impact ability, thereby improving its stability and safety.

[0005] To achieve the above object, the present utility model provides the following technical solution: A bicycle frame with stable structure, including a head tube and a middle tube. The middle tube is arranged on one side of the head tube. Rear upper forks are respectively arranged at the upper positions near the front and back of the center on one side of the middle tube. A crank support housing is arranged at the center of the lower end face of the middle tube. Rear lower forks are respectively arranged at the positions near the front and back of the center on one side of the crank support housing. A firm housing is arranged at the center of the outer sides of the head tube and the middle tube. Fixing devices are respectively arranged at the upper and lower positions near the center of the outer sides of the two firm housings. A down tube is fixedly connected at the center between the two fixing devices at the lower position. An up tube is fixedly connected at the center between the two fixing devices at the upper position. A protective device is sleeved at the center of the outer side of the upper end of the up tube;

[0006] Through the above technical solution, by the arrangement of the fixing device, it meets the detachable property of the down tube and the up tube, facilitates the user to quickly load, unload, repair and replace them, and enables the user to quickly replace the damaged or outdated parts, avoiding replacing the whole frame, thereby reducing the damage cost and increasing the service life.

[0007] Further, the fixing device includes an annular groove, two semi-circular ring sleeves, two connecting blocks and a fixing block. The annular groove is arranged on the outer side of the firm housing. The two semi-circular ring sleeves are respectively sleeved on the front and back inner walls of the annular groove. The two connecting blocks are respectively arranged at one ends of the two semi-circular ring sleeves. The fixing block is arranged at one ends of the two connecting blocks and is rotatably connected to the two connecting blocks through a rotating shaft respectively;

[0008] Through the above technical solution, by sleeving the semi-circular ring sleeves inside the annular groove and then rotatably connecting the fixing block and the connecting blocks through the rotating shaft, it meets the detachable property of the two semi-circular ring sleeves, facilitates the user to quickly load, unload, repair and replace them, and enables the user to quickly replace the damaged or outdated parts, avoiding replacing the whole frame, thereby reducing the damage cost and increasing the service life.

[0009] Further, a bolt is arranged at the position near one side of the center of the front end face of the front semi-circular ring sleeve. The output end of the bolt sequentially penetrates through the two semi-circular ring sleeves and reaches the rear end face of the rear semi-circular ring sleeve;

[0010] Through the above technical solution, the two semi-circular ring sleeves are fixed by the bolt, which meets the fixation of the up tube and the down tube.

[0011] Further, the protective device includes a protective sleeve, three first elastic straps, and three second elastic straps. The protective sleeve is sleeved on the outer side of the upper end of the upper tube. The three first elastic straps are respectively arranged at the front end near the center of the lower end face of the protective sleeve and at the front ends on both sides of the center of the lower end face. The second elastic straps are arranged at the rear end near the center of the lower end face of the protective sleeve and at the rear ends on both sides of the center of the lower end face. The three first elastic straps and the three second elastic straps are respectively sleeved on the outer side of the lower end of the upper tube;

[0012] Through the above technical solution, by sleeving the protective sleeve on the outer side of the upper end of the upper tube, it effectively alleviates the scratching damage of the upper tube to the user during use or in an emergency, thereby improving the user experience and comfort.

[0013] Further, a female Velcro layer is provided at the center of the inner wall of the three first elastic straps, and a male Velcro layer is provided at the center of the outer wall of the three second elastic straps. The male Velcro layer and the female Velcro layer are adhesively connected to each other;

[0014] Through the above technical solution, by sleeving the first elastic straps and the second elastic straps on the outer side of the lower end of the upper tube, and then adhesively connecting the male Velcro layer and the female Velcro layer to each other, it meets the detachable property of the protective sleeve and can be quickly disassembled, facilitating the user to replace and clean.

[0015] Further, the two rear lower forks are fixedly connected to the two rear upper forks respectively;

[0016] Through the above technical solution, by fixedly connecting the rear lower forks and the rear upper forks, it meets the integrity and wholeness of the bicycle frame.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the utility model, when the bicycle frame with stable structure is in use, through the setting of the fixing device, it meets the detachable property of the lower tube and the upper tube, facilitates the user to quickly load, unload, repair and replace them, and enables the user to quickly replace the damaged or obsolete parts, avoiding replacing the entire frame, thereby reducing the damage cost and increasing the service life.

[0019] 2. In the utility model, through the setting of the protective device, it effectively alleviates the scratching damage of the upper tube to the user during use or in an emergency, thereby improving the user experience and comfort, and can be quickly disassembled, facilitating the user to replace and clean.

[0020] 3. In the present utility model, through the provision of a sturdy housing, it can provide additional structural support for the frame, increase the strength of some parts of the frame, and enhance its impact resistance, thereby improving its stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of a bicycle frame with stable structure proposed by the present utility model;

[0022] Figure 2 Another perspective view of a protective device for a bicycle frame with stable structure proposed by the present utility model;

[0023] Figure 3 A front elevation sectional view of the head tube of a bicycle frame with stable structure proposed by the present utility model;

[0024] Figure 4 is Figure 2 An enlarged schematic view of part A in

[0025] Legend:

[0026] 1. Head tube; 2. Middle tube; 3. Rear upper fork; 4. Crank support housing; 5. Rear lower fork; 6. Sturdy housing; 7. Fixing device; 701. Annular groove; 702. Semi-circular ring sleeve; 703. Connecting block; 704. Fixing block; 705. Bolt; 8. Down tube; 9. Up tube; 10. Protective device; 1001. Protective sleeve; 1002. First elastic fastening band; 1003. Second elastic fastening band; 1004. Male layer of Velcro; 1005. Female layer of Velcro. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Refer to Figures 1-4, an embodiment provided by the present utility model: a bicycle frame with stable structure, including a head tube 1 and a middle tube 2. The middle tube 2 is arranged on one side of the head tube 1. Rear upper forks 3 are provided at the upper ends, front and back, of the center on one side of the middle tube 2. A crank support housing 4 is provided at the center of the lower end face of the middle tube 2. Rear lower forks 5 are provided at the front and back of the center on one side of the crank support housing 4. A sturdy housing 6 is provided at the center of the outer sides of the head tube 1 and the middle tube 2. Through the setting of the sturdy housing 6, it can provide additional structural support for the frame, increase the strength of some parts of the frame, and can increase its anti-impact ability, thereby improving its stability and safety.

[0029] Fixing devices 7 are provided at the upper and lower parts of the center on the outer sides of the two sturdy housings 6. Through the setting of the fixing devices 7, it meets the detachable requirements of the lower tube 8 and the upper tube 9, facilitates the user to quickly load, unload, repair and replace them, and enables the user to quickly replace damaged or outdated parts, avoiding replacing the entire frame, thereby reducing the damage cost and increasing the service life. The lower tube 8 is fixedly connected to the center between the two fixing devices 7 at the lower part, and the upper tube 9 is fixedly connected to the center between the two fixing devices 7 at the upper part. A protective device 10 is sleeved on the outer center of the upper end of the upper tube 9. Through the setting of the protective device 10, it effectively alleviates the scratching damage of the upper tube 9 to the user during use or in an emergency, thereby improving the user experience and comfort, and can be quickly disassembled to facilitate the user to replace and clean.

[0030] The fixing device 7 includes an annular groove 701, two semi-circular ring sleeves 702, two connecting blocks 703 and a fixing block 704. The annular groove 701 is arranged on the outer side of the sturdy housing 6. The two semi-circular ring sleeves 702 are respectively sleeved on the front and back inner walls of the annular groove 701. The two connecting blocks 703 are respectively arranged at one end of the two semi-circular ring sleeves 702. The fixing block 704 is arranged at one end of the two connecting blocks 703 and is rotatably connected to the two connecting blocks 703 through a rotating shaft respectively. By sleeving the semi-circular ring sleeve 702 inside the annular groove 701 and then rotatably connecting the fixing block 704 and the connecting block 703 through a rotating shaft, it meets the detachable requirements of the two semi-circular ring sleeves 702, facilitates the user to quickly load, unload, repair and replace them, and enables the user to quickly replace damaged or outdated parts, avoiding replacing the entire frame, thereby reducing the damage cost and increasing the service life.

[0031] A bolt 705 is provided at the center on one side of the front end face of the front semi-circular ring sleeve 702. The output end of the bolt 705 penetrates through the two semi-circular ring sleeves 702 in sequence and reaches the rear end face of the rear semi-circular ring sleeve 702. The two semi-circular ring sleeves 702 are fixed by the bolt 705, which meets the fixation of the upper tube 9 and the lower tube 8.

[0032] The protective device 10 includes a protective sleeve 1001, three first elastic straps 1002 and three second elastic straps 1003. The protective sleeve 1001 is sleeved on the outer side of the upper tube 9 at the upper end. The three first elastic straps 1002 are respectively arranged at the front end near the center of the lower end face of the protective sleeve 1001 and at the front end on both sides near the center of the lower end face. The second elastic straps 1003 are arranged at the rear end near the center of the lower end face of the protective sleeve 1001 and at the rear end on both sides near the center of the lower end face. The three first elastic straps 1002 and the three second elastic straps 1003 are respectively sleeved on the outer side of the lower end of the upper tube 9. By sleeving the protective sleeve 1001 on the outer side of the upper end of the upper tube 9, it effectively alleviates the scratching damage of the upper tube 9 to the user during use or in an emergency, thereby improving the user experience and comfort.

[0033] At the center of the inner wall of the three first elastic straps 1002, there is a female velcro layer 1005. At the center of the outer wall of the three second elastic straps 1003, there is a male velcro layer 1004. The male velcro layer 1004 and the female velcro layer 1005 are adhesively connected to each other. By sleeving the first elastic straps 1002 and the second elastic straps 1003 on the outer side of the lower end of the upper tube 9, and then adhesively connecting the male velcro layer 1004 and the female velcro layer 1005 to each other, it meets the detachable property of the protective sleeve 1001 and can achieve quick disassembly, facilitating the user to replace and clean.

[0034] The two rear lower forks 5 are fixedly connected to the two rear upper forks 3 respectively. By the fixed connection between the rear lower forks 5 and the rear upper forks 3, it meets the integrity and wholeness of the bicycle frame.

[0035] Working principle: When the bicycle frame with a stable structure is in use, through the setting of the sturdy housing 6, it can provide additional structural support for the frame, increase the strength of some parts of the frame, and improve its impact resistance, thereby enhancing its stability and safety. Then, the semi-circular sleeve 702 is sleeved inside the annular groove 701, and then the fixed block 704 and the connecting block 703 are rotatably connected through a rotating shaft. Then, the two semi-circular sleeves 702 are fixed by bolts 705, which satisfies the fixation of the upper tube 9 and the lower tube 8, and satisfies the detachable property of the two semi-circular sleeves 702, facilitating the user to quickly load, unload, repair, and replace them. Moreover, it enables the user to quickly replace damaged or outdated parts, avoiding replacing the entire frame, thereby reducing the damage cost and increasing the service life. Finally, the protective sleeve 1001 is sleeved on the outer side of the upper end of the upper tube 9, effectively alleviating the scratching damage of the upper tube 9 to the user during use or in an emergency, thereby improving the user experience and comfort. Then, the first elastic elastic band 1002 and the second elastic elastic band 1003 are sleeved on the outer side of the lower end of the upper tube 9, and then adhered to each other through the male hook layer 1004 and the female loop layer 1005 of the magic tape, which satisfies the detachable property of the protective sleeve 1001 and enables quick disassembly, facilitating the user to replace and clean it.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bicycle frame with a stable structure, comprising a head tube (1) and a middle tube (2), wherein the middle tube (2) is arranged at one side of the head tube (1), and characterized in that: A rear seat fork (3) is provided at the center of the front and rear upper end of one side of the middle tube (2); a crank support shell (4) is provided at the center of the lower end surface of the middle tube (2); a rear chain fork (5) is provided at the center of the front and rear of one side of the crank support shell (4); a solid shell (6) is provided at the center of the outer side of the head tube (1) and the middle tube (2); fixing devices (7) are provided at the upper and lower centers of the outer sides of the two solid shells (6); a lower tube (8) is fixedly connected at the center between the two fixing devices (7) at the lower part; an upper tube (9) is fixedly connected at the center between the two fixing devices (7) at the upper part; and a protective device (10) is sleeved at the center of the outer side of the upper end of the upper tube (9).

2. A bicycle frame with a stable structure according to claim 1, characterized in that: The fixing device (7) comprises an annular groove (701), two semicircular ring sleeves (702), two connecting blocks (703) and a fixing block (704); the annular groove (701) is arranged at the outside of the solid shell (6); the two semicircular ring sleeves (702) are respectively sleeved on the front and rear inner walls of the annular groove (701); the two connecting blocks (703) are respectively arranged at one end of the two semicircular ring sleeves (702); the fixing block (704) is arranged at one end of the two connecting blocks (703) and is rotatably connected to the two connecting blocks (703) via a rotating shaft.

3. A bicycle frame with a stable structure according to claim 2, characterized in that: A bolt (705) is provided at one side of the center of the front end face of the semicircular ring sleeve (702) near the front end, and the output end of the bolt (705) passes through the two semicircular ring sleeves (702) in sequence and reaches the rear end face of the semicircular ring sleeve (702) near the rear end.

4. A bicycle frame with a stable structure according to claim 1, characterized in that: The protective device (10) comprises a protective sleeve (1001), three first elastic bands (1002) and three second elastic bands (1003); the protective sleeve (1001) is sleeved on the outer side of the upper end of the upper tube (9); the three first elastic bands (1002) are respectively arranged at the front end of the center of the lower end surface of the protective sleeve (1001) and at the front end of the center of the lower end surface on both sides; the second elastic bands (1003) are arranged at the rear end of the center of the lower end surface of the protective sleeve (1001) and at the rear end of the center of the lower end surface on both sides; the three first elastic bands (1002) and the three second elastic bands (1003) are respectively sleeved on the outer side of the lower end of the upper tube (9).

5. A bicycle frame with a stable structure according to claim 4, characterized in that: A Velcro female layer (1005) is provided at the center of the inner wall of the three first elastic bands (1002), and a Velcro male layer (1004) is provided at the center of the outer wall of the three second elastic bands (1003), and the Velcro male layer (1004) and the Velcro female layer (1005) are adhered to each other.

6. A bicycle frame with a stable structure according to claim 1, characterized in that: The two rear lower forks (5) are respectively fixedly connected to the two rear upper forks (3).

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