Bicycle handlebar stem structure

Abstract

The utility model discloses a bicycle stem structure which comprises a vertical pipe sleeve, a wrap angle cover, a stem body and a stem front fixing piece, the stem body is fixedly connected to the vertical pipe sleeve, the stem front fixing piece is fixedly connected to the front end of the stem body, and the wrap angle cover wraps and is fixedly connected to the rear end of the stem body. A vertical pipe mounting hole is formed in the vertical pipe sleeve, a first pipe clamping part and a second pipe clamping part are arranged at the rear end of the stem body, a vertical pipe clamping hole is formed between the first pipe clamping part and the second pipe clamping part, a first arc-shaped groove is formed in the front end of the stem body, and a second arc-shaped groove is formed in the stem front fixing piece. A handlebar clamping hole is formed between the first arc-shaped groove and the second arc-shaped groove. The bicycle handlebar stem structure has the advantages of being novel in structural design, convenient to disassemble and assemble and good in use convenience, and the service life can be effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bicycle parts technology, specifically to a bicycle handlebar stem structure. Background Technology

[0002] With the continuous improvement of people's living standards, cycling, as an aerobic fitness activity, has been widely used for exercise, leisure, entertainment, and social activities, and has been integrated into people's lives. The existing bicycle stems are generally fixed by inserting or fitting the stem tube into the fork steerer tube from above to achieve axial and circumferential locking between the stem tube and the fork steerer tube. However, the drawback of this installation method is that the locking bolt head is on the upper part of the stem tube and exposed to the outside. After being exposed to sun and rain for a period of time, the bolt head and the inside of the fork steerer tube are prone to rust and loosening, resulting in the failure of the stem tube to be tightened, which poses a threat to the personal safety of bicycle users and has certain limitations. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a bicycle stem structure with novel structural design, convenient assembly and disassembly, good ease of use, and effective extension of service life.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A bicycle stem structure includes a stern tube sleeve, corner caps, a stem body, and a front stem fastener. The stem body is fixedly connected to the stern tube sleeve, the front stem fastener is fixedly connected to the front end of the stem body, and the corner caps cover and are fixedly connected to the rear end of the stem body.

[0006] The vertical tube sleeve is provided with a vertical tube mounting hole. The rear end of the stem body is provided with a first tube clamp and a second tube clamp. A vertical tube locking hole is formed between the first tube clamp and the second tube clamp. The front end of the stem body is provided with a first arc-shaped groove. The front fixing member of the stem is provided with a second arc-shaped groove. A handlebar locking hole is formed between the first arc-shaped groove and the second arc-shaped groove.

[0007] As a further improvement to the above technical solution:

[0008] The vertical tube sleeve has a support portion extending radially, and the handlebar body is disposed on the support portion. A first fastener is provided between the support portion and the handlebar body to fix the handlebar body to the vertical tube sleeve.

[0009] A second fastener is provided between the front stem fixing member and the stem body to fix the front stem fixing member to the front end of the stem body.

[0010] A third fastener is provided between the corner cover and the first tube clamp and the second tube clamp, so that the corner cover is fixedly connected to the rear end of the stem body.

[0011] The supporting part is provided with a U-shaped groove, and the vertical tube sleeve is provided with a first through groove. The U-shaped groove is connected to the first through groove.

[0012] The stem body is provided with a second through groove. The front side of the second through groove is connected to the handlebar locking hole, the rear side of the second through groove is connected to the vertical tube locking hole, and the lower side of the second through groove is connected to the first through groove.

[0013] A first snap-fit ​​structure is provided between the corner cover and the stem body. The first snap-fit ​​structure includes a first protrusion on the inner wall of the corner cover and a first groove on the outer wall of the stem body. The first protrusion and the first groove are snap-fit ​​connected.

[0014] A second snap-fit ​​structure is provided between the corner cover and the vertical tube sleeve. The second snap-fit ​​structure includes a second protrusion at the lower end of the corner cover and a second groove at the upper end of the vertical tube sleeve. The second protrusion and the second groove are snap-fit ​​connected.

[0015] The stem body is provided with a top cover for covering the vertical tube locking hole, and a fourth fastener is inserted through the top cover.

[0016] An aluminum ring is fixedly connected to the lower end of the vertical tube sleeve.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This utility model relates to a bicycle stem structure comprising a stem sleeve, corner caps, a stem body, and a front stem fastener. A handlebar locking hole is formed between the front stem fastener and the stem body for inserting the handlebars. A stem mounting hole inside the stem sleeve and a stem locking hole at the rear end of the stem body are used to insert the stem. The corner caps cover the rear end of the stem body, concealing the locking mechanism between the stem body and the stem, preventing rainwater or other impurities from entering the stem. This solves the problem of rust and corrosion of the locking mechanism and the interior of the stem, effectively extending its service life. It features a novel structural design, convenient assembly and disassembly, and ease of use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the bicycle handlebar stem structure.

[0020] Figure 2 An exploded view of the bicycle handlebar stem structure.

[0021] Figure 3This is a structural diagram of the vertical tube sleeve, corner cap, and handlebar body.

[0022] Figure 4 This is a structural diagram of the vertical tube sleeve, corner cap, and handlebar body from another angle.

[0023] Legend:

[0024] 1. Stem sleeve; 101. Stem mounting hole; 102. Support part; 2. Corner cap; 3. Stem body; 301. First tube clamp; 302. Second tube clamp; 303. Stem locking hole; 304. First arc-shaped groove; 4. Stem front fixing part; 401. Second arc-shaped groove; 5. Handlebar locking hole; 6. First fastener; 7. Second fastener; 8. Third fastener; 9. U-shaped groove; 10. First through groove; 11. Second through groove; 12. First protrusion; 13. First groove; 14. Second protrusion; 15. Second groove; 16. Top cover; 17. Fourth fastener; 18. Aluminum ring. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 4 As shown, the bicycle stem structure of this embodiment includes a stem sleeve 1, a corner cap 2, a stem body 3, and a front stem fixing member 4. The stem body 3 is fixedly connected to the stem sleeve 1, the front stem fixing member 4 is fixedly connected to the front end of the stem body 3, and the corner cap 2 covers and is fixedly connected to the rear end of the stem body 3. The stem sleeve 1 is provided with a stem mounting hole 101, the rear end of the stem body 3 is provided with a first tube clamp 301 and a second tube clamp 302, a stem clamping hole 303 is formed between the first tube clamp 301 and the second tube clamp 302, the front end of the stem body 3 is provided with a first arc-shaped groove 304, the front stem fixing member 4 is provided with a second arc-shaped groove 401, and a handlebar clamping hole 5 is formed between the first arc-shaped groove 304 and the second arc-shaped groove 401. The bicycle stem structure includes a stem sleeve 1, a corner cap 2, a stem body 3, and a front stem fastener 4. A handlebar locking hole 5 is formed between the front stem fastener 4 and the stem body 3 for inserting the handlebar. The stem mounting hole 101 inside the stem sleeve 1 and the stem locking hole 303 at the rear end of the stem body 3 are used to insert the stem. By covering the rear end of the stem body 3 with the corner cap 2, the locking device between the stem body 3 and the stem can be covered, preventing rainwater or other impurities from entering the interior of the stem. This solves the problem of rust and corrosion of the locking device and the interior of the stem, effectively extending the service life. It has the advantages of novel structural design, convenient disassembly and assembly, and good ease of use.

[0027] Preferably, a support portion 102 is formed on the vertical sleeve 1 extending radially, and the handlebar body 3 is disposed on the support portion 102. A first fastener 6 is provided between the support portion 102 and the handlebar body 3 so that the handlebar body 3 is fixedly connected to the vertical sleeve 1. The contact area between the handlebar body 3 and the support portion 102 is large, which can effectively reduce stress concentration at the stress points of the structure, increase structural stability, and have a large load-bearing capacity. Specifically, the first fastener 6 is preferably a screw.

[0028] Preferably, a second fastener 7 is provided between the front stem fixing member 4 and the stem body 3, so that the front stem fixing member 4 is fixedly connected to the front end of the stem body 3. Specifically, the second fastener 7 is preferably a screw. The front stem fixing member 4 and the stem body 3 are connected by screws, which makes installation and disassembly convenient and quick, low cost, and the screw connection is not easy to loosen when subjected to additional load, thus ensuring high reliability.

[0029] Preferably, a third fastener 8 is provided between the corner cover 2 and the first tube clamp 301 and the second tube clamp 302, so that the corner cover 2 is fixedly connected to the rear end of the stem body 3. Specifically, the third fastener 8 is preferably a screw. The corner cover 2 is connected to the first tube clamp 301 and the second tube clamp 302 by screws. The clamping degree of the vertical tube locking hole 303 can be adjusted by loosening or tightening the screws. It also has the advantages of convenient installation and disassembly, low cost and high reliability.

[0030] Preferably, the support portion 102 is provided with a U-shaped groove 9, and the vertical tube sleeve 1 is provided with a first through groove 10, with the U-shaped groove 9 and the first through groove 10 communicating with each other. In this embodiment, the support portion 102 is formed with a U-shaped groove 9, and the vertical tube sleeve 1 is formed with a first through groove 10. The communication between the U-shaped groove 9 and the first through groove 10 can form a cable passage, allowing the power cables of external components such as headlights and horns to pass through, so that the cables between the handlebars and the vertical tube are hidden inside the stem structure, resulting in a simpler and more aesthetically pleasing appearance.

[0031] Preferably, the stem body 3 has a second through groove 11. The front side of the second through groove 11 is connected to the handlebar locking hole 5, the rear side of the second through groove 11 is connected to the vertical tube locking hole 303, and the lower side of the second through groove 11 is connected to the first through groove 10. In this embodiment, the connection between the second through groove 11 and the first through groove 10 can form a wire-passing groove, through which the control signal wires of control components such as the headlight switch and horn switch on both sides of the handlebars can pass, which also has the advantage of a simple and beautiful appearance.

[0032] Preferably, a first snap-fit ​​structure is provided between the corner cover 2 and the stem body 3. The first snap-fit ​​structure includes a first protrusion 12 on the inner wall of the corner cover 2 and a first groove 13 on the outer wall of the stem body 3. The first protrusion 12 and the first groove 13 are snap-fit ​​connected. During assembly, the corner cover 2 can be pre-assembled on the stem body 3 to avoid loosening and displacement, and improve assembly efficiency.

[0033] Preferably, a second snap-fit ​​structure is provided between the corner cover 2 and the vertical tube sleeve 1. The second snap-fit ​​structure includes a second protrusion 14 at the lower end of the corner cover 2 and a second groove 15 at the upper end of the vertical tube sleeve 1. The second protrusion 14 and the second groove 15 are snap-fit ​​connected. During assembly, the corner cover 2 and the handlebar body 3 can be quickly positioned on the vertical tube sleeve 1 to avoid rotational displacement and improve assembly efficiency.

[0034] Preferably, the stem body 3 is provided with a top cover 16 for covering the vertical tube locking hole 303, and a fourth fastener 17 is provided on the top cover 16. Specifically, the fourth fastener 17 is preferably a screw, and the top cover 16 and the vertical tube are connected by screws to further improve the stability of the stem structure on the vertical tube.

[0035] Preferably, an aluminum ring 18 is fixedly connected to the lower end of the vertical sleeve 1.

[0036] The above description is merely a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. For those skilled in the art, improvements and modifications obtained without departing from the technical concept of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A bicycle handlebar stem structure, characterized in that, It includes a vertical tube sleeve (1), a corner cap (2), a stem body (3), and a front stem fixing member (4). The stem body (3) is fixedly connected to the vertical tube sleeve (1), the front stem fixing member (4) is fixedly connected to the front end of the stem body (3), and the corner cap (2) covers and is fixedly connected to the rear end of the stem body (3). The vertical tube sleeve (1) is provided with a vertical tube mounting hole (101). The rear end of the stem body (3) is provided with a first tube clamp (301) and a second tube clamp (302). A vertical tube locking hole (303) is formed between the first tube clamp (301) and the second tube clamp (302). The front end of the stem body (3) is provided with a first arc-shaped groove (304). The front fixing part (4) of the stem is provided with a second arc-shaped groove (401). A handlebar locking hole (5) is formed between the first arc-shaped groove (304) and the second arc-shaped groove (401).

2. The bicycle stem structure according to claim 1, characterized in that, The vertical sleeve (1) has a support portion (102) extending radially. The handlebar body (3) is disposed on the support portion (102). A first fastener (6) is provided between the support portion (102) and the handlebar body (3) so that the handlebar body (3) is fixedly connected to the vertical sleeve (1).

3. The bicycle stem structure according to claim 1, characterized in that, A second fastener (7) is provided between the front stem fixing member (4) and the stem body (3) so that the front stem fixing member (4) is fixedly connected to the front end of the stem body (3).

4. The bicycle stem structure according to claim 1, characterized in that, A third fastener (8) is provided between the corner cover (2) and the first tube clamp (301) and the second tube clamp (302) so that the corner cover (2) is fixedly connected to the rear end of the stem body (3).

5. The bicycle stem structure according to claim 2, characterized in that, The support part (102) is provided with a U-shaped groove (9), and the vertical tube sleeve (1) is provided with a first through groove (10). The U-shaped groove (9) and the first through groove (10) are connected.

6. The bicycle stem structure according to claim 5, characterized in that, The stem body (3) is provided with a second through groove (11). The front side of the second through groove (11) is connected to the handlebar locking hole (5), the rear side of the second through groove (11) is connected to the vertical tube locking hole (303), and the lower side of the second through groove (11) is connected to the first through groove (10).

7. The bicycle stem structure according to claim 1, characterized in that, A first snap-fit ​​structure is provided between the corner cover (2) and the stem body (3). The first snap-fit ​​structure includes a first protrusion (12) on the inner wall of the corner cover (2) and a first groove (13) on the outer wall of the stem body (3). The first protrusion (12) and the first groove (13) are snap-fit ​​connected.

8. The bicycle stem structure according to claim 7, characterized in that, A second snap-fit ​​structure is provided between the corner cover (2) and the vertical tube sleeve (1). The second snap-fit ​​structure includes a second protrusion (14) at the lower end of the corner cover (2) and a second groove (15) at the upper end of the vertical tube sleeve (1). The second protrusion (14) and the second groove (15) are snap-fit ​​connected.

9. The bicycle stem structure according to claim 1, characterized in that, The stem body (3) is provided with a top cover (16) for covering the vertical tube locking hole (303), and a fourth fastener (17) is provided on the top cover (16).

10. The bicycle stem structure according to claim 1, characterized in that, An aluminum ring (18) is fixedly connected to the lower end of the vertical tube sleeve (1).

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