Bicycle front fork with lock
By combining the lock body and lock bar of the bicycle front fork with protective components and mechanical linkage design, the problems of spoke damage and cumbersome operation in the locked state are solved, achieving efficient protection and improved anti-theft performance of the lock.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGTAI ZHAOFENG METAL PROD MFG CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional bicycle fork locks are prone to damaging the spokes when locked, are cumbersome to operate, and have insufficient anti-theft performance.
Design a lockable bicycle fork that uses a combination of lock body and lock bar structure. The lock bar fits tightly with the wheel and is equipped with a protective component to buffer spoke contact. It achieves quick positioning by engaging with a limit block and a slot. Combined with the mechanical linkage structure of gears and lock cylinder, it enhances anti-theft capabilities.
It effectively protects the spokes from damage, simplifies the operation process, improves the anti-theft performance and ease of use of the lock, and reduces the risk of being pried open.
Smart Images
Figure CN224277440U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bicycle technology, and in particular to a bicycle front fork with a lock. Background Technology
[0002] Bicycles are a widely used mode of transportation in my country, favored for their ease of operation, light weight, and maneuverability. However, this also makes them prone to loss and theft. To prevent such incidents, various vehicle locks have been developed, with locks designed for bicycle front forks being particularly prevalent. Their core principle is to lock the vehicle by preventing the tires from rotating.
[0003] Common front fork locking mechanisms are typically inserted between the spokes of the wheel to lock the wheel by preventing the spokes from rotating. However, because there is a certain gap between the spokes, the wheel can still rotate slightly even when locked. During this process, the spokes are very likely to come into contact with the locking mechanism. If the force of contact is large, the spokes can be easily damaged due to the high hardness of the locking mechanism. Therefore, this application proposes a locking bicycle front fork. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a locking bicycle front fork to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a locking bicycle front fork, comprising:
[0006] The wheel has an axle at its center that is coaxial with it. The axle is connected to the wheel by several spokes arranged in a circular array. Rotatable shafts that are coaxial with the axle are inserted between the axles.
[0007] The fork body has an inverted U-shaped bottom, and the two ends of the bottom of the fork body are connected to the axle.
[0008] The lock body is fixedly installed on one side of the front fork body and fitted over the top of the wheel. The upper half of the lock body is block-shaped, and the lower half of the lock body is ring-shaped. The bottom of the ring part of the lock body has a notch. One end of the notch has a two-thirds arc-shaped rod groove, and the other end of the notch has a slot.
[0009] The locking bar is movably inserted into the bar groove in an arc shape. The end of the locking bar near the notch can penetrate deep into the bar groove and be inserted into the slot. When the locking bar is inserted into the slot, there are notches on both sides of the locking bar at the notch, and protective components are installed in both notches.
[0010] Optionally, the block-shaped part of the lock body has an inner groove that communicates with the rod groove. A limit block is movably inserted into the inner groove. A first spring is connected between the top of the limit block and the top of the inner groove. A locking block is fixedly installed at the bottom of the limit block. A second locking groove is opened at the top of the outer side of the lock rod. A first locking groove is also opened on the outer side of the lock rod at a 90° angle to the second locking groove. The locking block can extend into the rod groove and engage in the second locking groove.
[0011] Optionally, a slot communicating with the rod groove is opened on the side of the lock body ring. A toggle bolt is fixedly connected to the side of the lock rod at the position corresponding to the first slot. One end of the toggle bolt extends through the slot to the outside of the lock body. When the toggle bolt moves to the top of the slot, the position of the first slot on the outer wall of the lock rod corresponds to the locking block.
[0012] Optionally, a shaft groove is provided on one side of the inner groove, and a gear is provided in the shaft groove. The side of the limiting block near the shaft groove is provided with teeth that mesh with the gear. The side of the block-shaped part of the lock body is provided with an opening that communicates with the shaft groove, and a lock cylinder that connects with the gear is provided in the opening.
[0013] Optionally, the lock cylinder includes a lock cylinder and a core body. The lock cylinder is fixedly inserted into the through-hole, and the core body is inserted into the lock cylinder and fixedly connected to the shaft of the gear.
[0014] Optionally, the protective component includes a baffle, a connecting rod, and a second spring. Two connecting slots are provided on the side of the notch. Connecting rods are fixedly connected to both ends of one side of the baffle. The two connecting rods are movably inserted into the corresponding connecting slots. An anti-detachment plate is provided at the inner end of the connecting rod located in the connecting slot, and a second spring is fixedly connected between the anti-detachment plate and the inner end of the connecting slot.
[0015] Optionally, connecting grooves are provided at both ends of the bottom of the fork body, and the two ends of the shaft are respectively engaged in the connecting grooves. Nuts that tightly abut against the fork body are threaded onto both ends of the shaft.
[0016] The beneficial effects of this utility model are:
[0017] This invention fixes the lock body to the front fork body and fits it onto the top of the wheel. The arc-shaped structure of the lock bar and the lock body can closely fit the wheel contour. When the lock bar is inserted into the slot to lock, the protective components (baffle, connecting rod and second spring) at the notch of the lock bar can provide cushioning when the spokes come into contact with the lock bar: when the spokes squeeze the baffle, the connecting rod drives the anti-detachment plate to compress the second spring, and absorbs the impact force through elastic deformation, avoiding spoke wear or breakage caused by hard contact in traditional locks, and effectively protecting the wheel structure.
[0018] During the locking process, the extension and retraction of the locking rod can be controlled by moving the pin along the slot. The locking mechanism of the limit block and the slot enables quick positioning. No additional lock is required, which simplifies the operation process and improves user convenience.
[0019] The limiting block inside the lock body engages with the second slot (locked state) or the first slot (unlocked state) of the lock rod through the action of the first spring, achieving stable positioning of the lock rod. At the same time, the tooth meshing structure between the gear and the limiting block is controlled by the lock cylinder. Only when the key is inserted and the cylinder is turned can the gear be driven to move the limiting block up and down, completing the unlocking. The dual limiting mechanism significantly improves the anti-theft capability of the lock and reduces the risk of being pried open. Attached Figure Description
[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the structure connecting the wheel and the front fork body of this utility model;
[0023] Figure 3 This is a schematic diagram of the lock body of this utility model;
[0024] Figure 4 This is a cross-sectional structural diagram of the connection between the lock body and the lock rod of this utility model;
[0025] Figure 5 This is a schematic diagram of the locking rod of this utility model;
[0026] Figure 6 This is a schematic diagram of the connection between the locking rod and the protective component of this utility model;
[0027] Figure 7 This is a schematic diagram of the connection between the limiting block and the gear in this utility model;
[0028] In the picture:
[0029] 11. Wheel; 12. Axle; 13. Spokes; 14. Fork body; 15. Shaft; 16. Nut;
[0030] 21. Lock body; 22. Rod groove; 23. Lock rod; 24. Slot; 25. Groove opening; 26. Actuating bolt; 27. Notched groove; 28. Protective component; 29. Inner groove; 210. Limiting block; 211. First spring; 212. Gear; 213. Through port; 214. Lock cylinder;
[0031] 231. First card slot; 232. Second card slot;
[0032] 281. Baffle; 282. Connecting rod; 283. Second spring;
[0033] 2101, Card Block;
[0034] 2141. Lock cylinder; 2142. Core. Detailed Implementation
[0035] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0036] Please see Figures 1-7 This utility model provides a technical solution: a lockable bicycle front fork, including a wheel 11, an axle 12 coaxially disposed at the center of the wheel 11, a plurality of spokes 13 arranged in a circular array connected to the axle 12 and the wheel 11, a rotatable and coaxial shaft 15 inserted between the axles 12, a front fork body 14 mounted on the top of the wheel 11, the bottom of the front fork body 14 being inverted U-shaped, the two ends of the bottom of the front fork body 14 being connected to the shaft 15, a lock body 21 fixedly installed on one side of the front fork body 14 and fitted onto the top of the wheel 11, the upper half of the lock body 21 being block-shaped, the lower half of the lock body 21 being annular, and a notch being opened at the bottom end of the annular part of the lock body 21, one end of the notch being a two-thirds arc-shaped rod groove 22. The other end of the notch has a slot 24, and a matching locking rod 23 is movably inserted into the rod groove 22. The end of the locking rod 23 near the notch can penetrate into the rod groove 22 and be inserted into the slot 24. When the locking rod 23 is inserted into the slot 24, notches 27 are opened on both sides of the locking rod 23 at the notch. Protective components 28 are set in both notches 27. The lock body 21 and the locking rod 23 adopt an arc-shaped design to fit the contour of the wheel 11. After the locking rod 23 is inserted into the slot 24, a closed-loop locking structure is formed, which can effectively prevent the wheel 11 from rotating and improve the locking reliability. The protective component 28 is set at the notch of the locking rod 23, which can play a buffering role when the spoke 13 contacts the locking rod 23, avoiding damage to the spoke 13 due to hard impact, and solving the problem that traditional locks are prone to damaging the spoke 13.
[0037] like Figure 4 , Figure 5 and Figure 7As shown, the lock body 21 has an inner groove 29 that communicates with the rod groove 22. A limiting block 210 is movably inserted into the inner groove 29. A first spring 211 is connected between the top of the limiting block 210 and the top of the inner groove 29. The elasticity of the first spring 211 makes the locking block 2101 fit tightly with the first locking groove 231 or the second locking groove 232, which can reduce the shaking of the lock rod 23 and reduce the risk of abnormal noise when riding or locking. The locking block 2101 is fixedly installed at the bottom of the limiting block 210. A second locking groove 23 is provided on the top of the outer side of the lock rod 23. 2. A first slot 231 is provided on the outer side of the locking rod 23 at a 90° angle to the second slot 232. The locking block 2101 can extend into the rod groove 22 and engage in the second slot 232. The limiting block 210 and the first spring 211 in the lock body 21 cooperate with the locking block 2101. By engaging the locking block 2101 with the second slot 232 or the first slot 231 of the locking rod 23, the position of the locking rod 23 can be stably restricted. In the locked state, the locking rod 23 is ensured not to loosen. In the unlocked state, the locking rod 23 is stably stored, thus improving the safety of the lock.
[0038] like Figure 3 , Figure 4 and Figure 5 As shown, the side of the annular portion of the lock body 21 has a slot 25 that communicates with the rod groove 22. A toggle bolt 26 is fixedly connected to the side of the lock rod 23 at the position corresponding to the first slot 231. One end of the toggle bolt 26 extends through the slot 25 to the outside of the lock body 21. When the toggle bolt 26 moves to the top of the slot 25, the position of the first slot 231 on the outer wall of the lock rod 23 corresponds to the locking block 2101. The cooperation between the slot 25 and the toggle bolt 26 provides guidance for the movement of the lock rod 23, making it convenient for users to control the extension and retraction of the lock rod 23 through the toggle bolt 26. The operation is convenient. The position of the toggle bolt 26 corresponds to the first slot 231, which can intuitively reflect the status of the lock rod 23, making it easy for users to judge whether the lock is in the unlocked or locked position, thus improving the convenience of use.
[0039] like Figure 3 , Figure 4 and Figure 7 As shown, a shaft groove is provided on one side of the inner groove 29, and a gear 212 is provided in the shaft groove. The side of the limiting block 210 near the shaft groove has teeth that mesh with the gear 212. The side of the block-shaped part of the lock body 21 has a through-hole 213 that communicates with the shaft groove. A lock cylinder 214 connected to the gear 212 is provided in the through-hole 213. The gear 212 meshes with the teeth of the limiting block 210. The lock cylinder 214 controls the rotation of the gear 212, which in turn drives the limiting block 210 to rise and fall to achieve unlocking, forming a mechanical linkage anti-theft structure. This increases the difficulty of cracking and improves the anti-theft performance. The connection structure between the lock cylinder 214 and the gear 212 is hidden inside the lock body 21, reducing the possibility of external damage and enhancing the lock's resistance to damage.
[0040] like Figure 4 and Figure 7 As shown, the lock cylinder 214 includes a lock cylinder 2141 and a core 2142. The lock cylinder 2141 is fixedly inserted into the through-hole 213, and the core 2142 is inserted into the lock cylinder 2141 and fixedly connected to the shaft of the gear 212. The structure of the lock cylinder 2141, the core 2142 and the gear 212 makes the lock cylinder 214 stable to install. At the same time, the rotation of the core 2142 can be accurately transmitted to the gear 212, ensuring the smoothness of the unlocking operation and improving the reliability of the lock.
[0041] like Figure 3 , Figure 5 and Figure 6 As shown, the protective component 28 includes a baffle 281, a connecting rod 282, and a second spring 283. Two connecting slots are provided on the side of the notch 27. The two ends of one side of the baffle 281 are fixedly connected to the connecting rod 282. The two connecting rods 282 are respectively movably inserted into the corresponding connecting slots. An anti-detachment plate is provided at the inner end of the connecting rod 282 located in the connecting slot, and a second spring 283 is fixedly connected between the anti-detachment plate and the inner end of the connecting slot. The baffle 281, connecting rod 282, and second spring 283 of the protective component 28 cooperate to buffer the impact force when the spoke 13 contacts the locking rod 23 through the extension and retraction of the second spring 283, further avoiding damage to the spoke 13 and enhancing the protection of the wheel 11. The cooperation between the connecting rod 282 and the connecting slot restricts the movement trajectory of the baffle 281, and the anti-detachment plate prevents the connecting rod 282 from falling off, ensuring the long-term stable operation of the protective component 28 and improving the durability of the lock.
[0042] like Figure 1 and Figure 2 As shown, both ends of the bottom of the fork body 14 are provided with connecting grooves, and both ends of the shaft 15 are respectively engaged in the connecting grooves. Nuts 16 are threaded on both ends of the shaft 15 and tightly abut against the fork body 14. The shaft 15 and the fork body 14 are fixed by engaging the connecting grooves and the nuts 16, which makes the connection firm and easy to disassemble and maintain.
[0043] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A locking bicycle front fork, characterized in that, include: The wheel (11) has an axle (12) coaxial with it at the center. The axle (12) and the wheel (11) are connected by a number of spokes (13) arranged in a circular array. A rotatable shaft (15) coaxial with the axle (12) is inserted between them. The fork body (14) has an inverted U-shaped bottom, and the two ends of the bottom of the fork body (14) are connected to the axle (15); The lock body (21) is fixedly installed on one side of the front fork body (14) and sleeved on the top of the wheel (11). The upper half of the lock body (21) is block-shaped, and the lower half of the lock body (21) is ring-shaped. The bottom end of the ring part of the lock body (21) has a notch. One end of the notch has a two-thirds arc-shaped rod groove (22), and the other end of the notch has a slot (24). The locking rod (23) is movably inserted into the rod groove (22) in an arc shape. The end of the locking rod (23) near the notch can penetrate into the rod groove (22) and be inserted into the slot (24). When the locking rod (23) is inserted into the slot (24), notches (27) are provided on both sides of the locking rod (23) at the notch. Protective components (28) are provided in both notches (27).
2. A locking bicycle front fork according to claim 1, characterized in that, The lock body (21) has an inner groove (29) that communicates with the rod groove (22) in the block part. A limiting block (210) is movably inserted in the inner groove (29). A first spring (211) is connected between the top of the limiting block (210) and the top of the inner groove (29). A locking block (2101) is fixedly installed at the bottom of the limiting block (210). A second locking groove (232) is opened on the top of the outer side of the lock rod (23). A first locking groove (231) is also opened on the outer side of the lock rod (23) at a 90° angle to the second locking groove (232). The locking block (2101) can extend into the rod groove (22) and engage in the second locking groove (232).
3. A locking bicycle front fork according to claim 1, characterized in that, The side of the annular part of the lock body (21) is provided with a slot (25) that communicates with the rod groove (22). The side of the lock rod (23) is fixedly connected with a lever bolt (26) at the position corresponding to the first slot (231). One end of the lever bolt (26) extends through the slot (25) to the outside of the lock body (21). When the lever bolt (26) moves to the top of the slot (25), the position of the first slot (231) on the outer wall of the lock rod (23) corresponds to the locking block (2101).
4. A locking bicycle front fork according to claim 2, characterized in that, A shaft groove is provided on one side of the inner groove (29), and a gear (212) is provided in the shaft groove. The side of the limiting block (210) near the shaft groove is provided with teeth that mesh with the gear (212). The side of the block-shaped part of the lock body (21) is provided with a through-hole (213) that communicates with the shaft groove, and a lock cylinder (214) that connects with the gear (212) is provided in the through-hole (213).
5. A locking bicycle front fork according to claim 4, characterized in that, The lock cylinder (214) includes a lock cylinder (2141) and a core (2142). The lock cylinder (2141) is fixedly inserted into the port (213), and the core (2142) is inserted into the lock cylinder (2141) and fixedly connected to the shaft of the gear (212).
6. A locking bicycle front fork according to claim 1, characterized in that, The protective component (28) includes a baffle (281), a connecting rod (282), and a second spring (283). Two connecting slots are provided on the side of the notch (27). The two ends of one side of the baffle (281) are fixedly connected to the connecting rod (282). The two connecting rods (282) are respectively movably inserted into the corresponding connecting slots. An anti-detachment plate is provided at the inner end of the connecting rod (282) located in the connecting slot, and a second spring (283) is fixedly connected between the anti-detachment plate and the inner end of the connecting slot.
7. A locking bicycle front fork according to claim 1, characterized in that, Both ends of the bottom of the fork body (14) are provided with connecting grooves, and both ends of the shaft (15) are respectively engaged in the connecting grooves. Nuts (16) that tightly abut against the fork body (14) are threaded onto both ends of the shaft (15).