High-reliability frame fork

Abstract

The utility model belongs to the technical field of frame fork, specifically is a kind of high reliability frame fork, including riser, riser bottom end is inserted with connecting piece, connecting piece and riser between being equipped with connecting assembly, by using adhesive together with riser and connecting piece connection can reduce stress concentration phenomenon, make the stress distribution of connecting part more uniform, to improve the overall structural strength and durability of frame, by setting multiple first serrated card strip and second serrated card strip that bite together, it can increase the contact area between riser and connecting piece, so that adhesive can more fully fill gap, this structure will traditional plane gluing change into three-dimensional gluing, gluing area can be improved several times, to greatly improve the bonding strength, simultaneously, the tooth shape design of serrated structure can form mechanical interlocking effect, when riser and connecting piece are subjected to shear force, tooth shape structure can disperse stress, prevent adhesive layer from failure due to local stress concentration.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle frame front fork technology, specifically a highly reliable bicycle frame front fork. Background Technology

[0002] The frame fork is a core structural component of a bicycle (including e-bikes). It consists of two parts: the front of the frame and the fork. It is a key component connecting the bicycle frame and the front wheel, and together they undertake multiple functions such as connecting the wheel, supporting the bicycle body, transmitting power, and damping vibrations. It plays a decisive role in riding stability, comfort, and handling.

[0003] The front fork of a bicycle frame mainly consists of the seat tube, connector, fork tube, and connecting claws. The seat tube is the core component connecting the fork to the frame and is a key component for controlling riding direction; the connector is the "central connecting component" of the fork, and its core function is to integrate different structures and ensure the even transmission of force; the fork tube is the core component of the fork to achieve "shock absorption" and "support"; the connecting claw is the component that directly connects the fork to the front wheel, and its core function is to "secure the wheel" and "install accessories".

[0004] Through long-term use and observation, it was found that when assembling the seat tube and connector of the frame fork, the welded points are prone to loosening under vibration, and the welded joints may deform or crack due to stress concentration.

[0005] Therefore, this utility model provides a highly reliable frame front fork. Utility Model Content

[0006] To overcome the shortcomings of existing technologies and solve the problem of unstable connection when assembling the seat tube and connector of the frame fork as mentioned in the background art, a highly reliable frame fork is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A high-reliability bicycle frame fork of this utility model includes a seat tube, a connector inserted at the bottom end of the seat tube, a connecting assembly between the connector and the seat tube, a left front fork tube fixedly connected to the middle of the side wall of the connector, a left connecting claw connected to the bottom of the left front fork tube, the left connecting claw and the left front fork tube being glued together, a right front fork tube fixedly connected to the middle of the side wall of the connector, a right connecting claw connected to the bottom of the right front fork tube, the right connecting claw and the right front fork tube being glued together, the left and right front fork tubes being correspondingly arranged, the left and right connecting claws being correspondingly arranged, a connecting hole being opened in the middle of the side wall of both the left and right connecting claws, protective assemblies being provided on both sides of both the left and right connecting claws, the protective assemblies covering the outside of the connecting holes, a reinforcing assembly being provided in the middle of the inner side wall of the seat tube, and the connecting assembly including multiple first serrated clips fixed to the side wall of the seat tube. The first serrated retaining strips are evenly arranged at the bottom end of the riser. Multiple second serrated retaining strips are fixed to the middle of the inner wall of the connector. The second serrated retaining strips correspond to the first serrated retaining strips, and adhesive is used to fill the space between them. This step, by using adhesive to connect the riser and connector, reduces stress concentration and makes the stress distribution at the connection point more uniform, thereby improving the overall structural strength and durability of the frame. By setting multiple interlocking first and second serrated retaining strips, the contact area between the riser and connector is increased, allowing the adhesive to fill the gaps more fully. This structure transforms traditional planar bonding into three-dimensional bonding, increasing the bonding area several times over and significantly improving the bonding strength. Simultaneously, the toothed design of the serrated structure creates a mechanical interlocking effect. When the riser and connector are subjected to shear force, the toothed structure can disperse stress, preventing the adhesive layer from failing due to localized stress concentration.

[0008] Preferably, the reinforcement component includes multiple main reinforcing ribs installed inside the riser. Multiple secondary reinforcing ribs are installed in the middle of the inner wall of the riser. The secondary reinforcing ribs are fixed together with the main reinforcing ribs. A casting layer is filled between the main reinforcing ribs and the riser. This step, by setting the main reinforcing ribs, secondary reinforcing ribs and casting layer, can form a grid structure inside the riser, increase the moment of inertia of the riser section, thereby reducing the deformation of the riser under longitudinal bending and lateral torsion, and improving the riser's resistance to deformation. Moreover, the connection between the riser and the frame is a high-stress concentration area. The main and secondary reinforcing ribs disperse the concentrated load to a larger area, reduce the local stress level, reduce the risk of crack initiation, and improve the overall fatigue life of the frame and fork.

[0009] Preferably, a shock-absorbing pad is fixed in the middle of the inner wall of the connecting hole. The shock-absorbing pad is made of elastic material. An oil reservoir is fixed in the middle of the inner wall of the connecting hole. The oil reservoir is located above the shock-absorbing pad. An inlet pipe is connected to the middle of the side wall of the oil reservoir. Both the oil reservoir and the inlet pipe are made of elastic material. This step of setting the shock-absorbing pad can absorb the high-frequency vibration generated by the wheel and the ground during riding through elastic deformation, reduce the impact force transmitted to the frame and rider, reduce the bouncing of the wheel due to vibration, maintain continuous contact between the tire and the ground, thereby improving grip and handling stability. By setting the oil reservoir and the inlet pipe, an oil film can be formed on the contact surface between the connecting hole and the wheel axle, converting dry friction into liquid friction, reducing energy loss caused by friction, reducing the vibration intensity felt by the rider, and improving handling stability.

[0010] Preferably, the protective component includes multiple dustproof pads, which are fixed to both sides of the left or right connecting claw and cover the outside of the connecting hole. The dustproof pads are made of deformable material. This step, by setting the dustproof pads, can dynamically seal the connecting hole and block the path of mud and sand intrusion. After mud and sand intrude into the gap between the connecting hole and the wheel axle, it will increase steering resistance and cause sluggish handling. By keeping the contact surface clean, the dustproof pads can ensure that the steering system responds sensitively and improve safety when cornering at high speed.

[0011] Preferably, a full-go stop bolt is installed between the seat tube, the connector, and the right front fork tube. The full-go stop bolt is glued to the inside of the seat tube and the right front fork tube. This step, by installing a full-go stop bolt inside the frame fork, can control the gap between the fork and the frame, reduce structural loosening caused by vibration or impact during riding, and enhance structural stability.

[0012] Preferably, the riser, connector, left fork tube, left connecting claw, right fork tube, and right connecting claw are all coated with an anti-corrosion and anti-rust layer. This step, by coating the riser, connector, left fork tube, left connecting claw, right fork tube, and right connecting claw with an anti-corrosion and anti-rust layer, can form a dense "protective film" on their outer surface, preventing moisture and oxygen from contacting the metal substrate of the fork and extending the service life of the frame fork.

[0013] The beneficial effects of this utility model are as follows: 1. The high-reliability frame fork of this utility model reduces stress concentration by using adhesive to connect the seat tube and connector, resulting in a more uniform stress distribution at the connection point and thus improving the overall structural strength and durability of the frame. By setting multiple interlocking first and second serrated retaining strips, the contact area between the seat tube and connector can be increased, allowing the adhesive to fill the gaps more fully. This structure transforms traditional planar bonding into three-dimensional bonding, increasing the bonding area several times and significantly improving the bonding strength. At the same time, the toothed design of the serrated structure can create a mechanical interlocking effect. When the seat tube and connector are subjected to shear force, the toothed structure can disperse the stress and prevent the adhesive layer from failing due to local stress concentration.

[0014] 2. The high-reliability frame fork of this utility model, by setting main reinforcing ribs, secondary reinforcing ribs and a casting layer, can form a grid structure inside the seat tube, increase the moment of inertia of the seat tube section, thereby reducing the deformation of the seat tube under longitudinal bending and lateral torsion, and improving the deformation resistance of the seat tube. Moreover, the connection between the seat tube and the frame is a high stress concentration area. The main reinforcing ribs and secondary reinforcing ribs reduce the local stress level by dispersing the concentrated load to a larger area, reducing the risk of crack initiation, and improving the overall fatigue life of the frame fork. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the mating structure of the upright pipe and the connector in this utility model; Figure 3 This is a schematic diagram of the cooperation structure between the reinforcing rib and the riser in this utility model; Figure 4 This is a schematic diagram of the mating structure of the connecting claw and the dustproof pad in this utility model; Figure 5 This is a schematic diagram of the structure of the all-through stop bolt in this utility model.

[0017] Legend: 1. Riser; 11. Connector; 12. Left front fork tube; 13. Left connecting claw; 14. Right front fork tube; 15. Right connecting claw; 2. First serrated retaining strip; 21. Second serrated retaining strip; 3. Main reinforcing rib; 31. Secondary reinforcing rib; 32. Cast-in-place layer; 4. Shock-absorbing pad; 41. Oil reservoir; 42. Liquid inlet pipe; 5. Dustproof pad; 6. Full-slip stop. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] Specific implementation examples are given below.

[0020] like Figures 1 to 4 As shown in the figure, a high-reliability bicycle frame fork according to an embodiment of the present invention includes a seat tube 1, a connector 11 inserted into the bottom end of the seat tube 1, a connecting assembly between the connector 11 and the seat tube 1, a left front fork tube 12 fixedly connected to the middle of the side wall of the connector 11, a left connecting claw 13 connected to the bottom of the left front fork tube 12, the left connecting claw 13 and the left front fork tube 12 glued together, a right front fork tube 14 fixedly connected to the middle of the side wall of the connector 11, a right connecting claw 15 connected to the bottom of the right front fork tube 14, the right connecting claw 15 and the right front fork tube 14 glued together, the left front fork tube 12 and the right front fork tube 14 are correspondingly arranged, the left connecting claw 13 and the right connecting claw 15 are correspondingly arranged, a connecting hole is opened in the middle of the side wall of the left connecting claw 13 and the right connecting claw 15, and protective assemblies are provided on both sides of the left connecting claw 13 and the right connecting claw 15, the protective assemblies are covered outside the connecting holes, and the inner side wall of the seat tube 1 is... The unit is equipped with a reinforcement component. The seat tube 1 is inserted into the connector 11, and then the connector 11 and the seat tube 1 are fixed together using the connecting component. The left connecting claw 13 and the left front fork tube 12 are then fixed together by gluing. Similarly, the right front fork tube 14 and the right connecting claw 15 are fixed together by gluing. At this time, the seat tube 1, connector 11, left front fork tube 12, left connecting claw 13, right front fork tube 14 and right connecting claw 15 are combined into a whole. Then, the front wheel is installed between the left front fork tube 12 and the right front fork tube 14, and the front wheel axle is passed through the connecting holes opened on the side walls of the left connecting claw 13 and the right connecting claw 15. The axle nut is tightened with a wrench to install the front wheel on the frame fork. During riding, the reinforcement component will enhance the sturdiness of the seat tube 1, while the protective component will block external mud, sand and other dust from the outside of the connecting holes.

[0021] like Figure 3As shown, the connecting assembly includes multiple first serrated retaining strips 2, which are fixed to the side wall of the riser 1. These strips are evenly arranged at the bottom of the riser 1. Multiple second serrated retaining strips 21 are fixed to the middle of the inner wall of the connector 11. The second serrated retaining strips 21 correspond to the first serrated retaining strips 2, and adhesive is filled between them. When the riser 1 is inserted into the connector 11, because the first serrated retaining strips 2 and second serrated retaining strips 21 are correspondingly arranged, the multiple first serrated retaining strips 2 on the side wall of the riser 1 will engage with the multiple second serrated retaining strips 21 on the inner wall of the connector 11. Then, adhesive is sprayed onto the connection between the riser 1 and the connector 11, and the adhesive is evenly coated on the multiple first serrated retaining strips 21. Between the retaining strip 2 and the second serrated retaining strip 21, this step of connecting the riser 1 and the connector 11 together using adhesive can reduce stress concentration and make the stress distribution at the connection point more uniform, thereby improving the overall structural strength and durability of the frame. By setting multiple interlocking first serrated retaining strips 2 and second serrated retaining strips 21, the contact area between the riser 1 and the connector 11 can be increased, allowing the adhesive to fill the gap more fully. This structure transforms the traditional planar bonding into three-dimensional bonding, which can increase the bonding area several times, thereby greatly improving the bonding strength. At the same time, the toothed design of the serrated structure can form a mechanical interlocking effect. When the riser 1 and the connector 11 are subjected to shear force, the toothed structure can disperse the stress and prevent the adhesive layer from failing due to local stress concentration.

[0022] like Figure 2 and Figure 3 As shown, the reinforcement assembly includes multiple main reinforcing ribs 3, which are installed inside the riser 1. Multiple secondary reinforcing ribs 31 are installed in the middle of the inner wall of the riser 1, and the secondary reinforcing ribs 31 are fixed together with the main reinforcing ribs 3. A casting layer 32 is filled between the main reinforcing ribs 3 and the riser 1. After fixing the multiple main reinforcing ribs 3 and secondary reinforcing ribs 31 together, they are inserted into the riser 1. Then, the casting layer 32 is poured into the riser 1, filling the space between the riser 1, the main reinforcing ribs 3, and the secondary reinforcing ribs 31. After solidification and drying, the process continues... In the assembly of the bicycle frame fork, this step, by setting the main reinforcing rib 3, the secondary reinforcing rib 31, and the casting layer 32, can form a grid-like structure inside the seat tube 1, increasing the moment of inertia of the seat tube 1, thereby reducing the deformation of the seat tube 1 under longitudinal bending and lateral torsion, and improving the deformation resistance of the seat tube 1. In addition, the connection between the seat tube 1 and the frame is a high-stress concentration area. The main reinforcing rib 3 and the secondary reinforcing rib 31 reduce the local stress level by dispersing the concentrated load to a larger area, reducing the risk of crack initiation, and improving the overall fatigue life of the frame fork.

[0023] like Figure 4As shown, a shock-absorbing pad 4 is fixed in the middle of the inner wall of the connecting hole. The shock-absorbing pad 4 is made of elastic material. An oil reservoir 41 is fixed in the middle of the inner wall of the connecting hole. The oil reservoir 41 is located above the shock-absorbing pad 4. An inlet pipe 42 is connected to the middle of the side wall of the oil reservoir 41. Both the oil reservoir 41 and the inlet pipe 42 are made of elastic material. Sufficient lubricant is injected into the oil reservoir 41 beforehand through the inlet pipe 42. When the wheel axle is bumpy, it will squeeze the oil reservoir 41 upward, causing the lubricant inside the oil reservoir 41 to overflow and coat the surface of the wheel axle. This step... The shock-absorbing pad 4 can absorb the high-frequency vibration generated between the wheel and the ground during riding through elastic deformation, reducing the impact force transmitted to the frame and rider, reducing wheel bouncing due to vibration, maintaining continuous contact between the tire and the ground, thereby improving grip and handling stability. By setting up the oil reservoir 41 and the liquid inlet pipe 42, an oil film can be formed on the contact surface between the connection hole and the wheel axle, converting dry friction into liquid friction, reducing energy loss caused by friction, reducing the vibration intensity felt by the rider, and improving handling stability.

[0024] like Figure 1 , Figure 2 and Figure 4 As shown, the protective component includes multiple dustproof pads 5, which are fixed to both sides of the left connecting claw 13 or the right connecting claw 15. The dustproof pads 5 cover the outside of the connecting hole. The dustproof pads 5 are made of deformable material. During riding, the dustproof pads 5 covering the outside of the connecting hole will block mud and sand splashed on the road surface from entering the connecting hole. This step can dynamically seal the connecting hole by setting the dustproof pads 5, blocking the path of mud and sand intrusion. After mud and sand enter the gap between the connecting hole and the wheel axle, it will increase the steering resistance and cause sluggish handling. By keeping the contact surface clean, the dustproof pads 5 can ensure that the steering system responds sensitively and improve safety when cornering at high speed.

[0025] like Figure 1 , Figure 2 As shown, a full-go stop bolt 6 is installed between the seat tube 1, the connector 11 and the right front fork tube 14. The full-go stop bolt 6 is glued to the inside of the seat tube 1 and the right front fork tube 14. This step, by installing the full-go stop bolt 6 inside the frame fork, can control the gap between the fork and the frame, reduce structural loosening caused by vibration or impact during riding, and enhance structural stability.

[0026] like Figures 1 to 4 As shown, the outside of the seat tube 1, connector 11, left front fork tube 12, left connecting claw 13, right front fork tube 14, and right connecting claw 15 are all coated with an anti-corrosion and anti-rust layer. This step, by spraying an anti-corrosion and anti-rust layer on the outside of the seat tube 1, connector 11, left front fork tube 12, left connecting claw 13, right front fork tube 14, and right connecting claw 15, can form a dense "protective film" on their outer surface, preventing moisture and oxygen from contacting the metal substrate of the fork and extending the service life of the frame fork.

[0027] Working principle: Insert the seat tube 1 into the connector 11, then use the connecting assembly to fix the connector 11 and the seat tube 1 together. Then, fix the left connecting claw 13 and the left front fork tube 12 together by gluing. Similarly, fix the right front fork tube 14 and the right connecting claw 15 together by gluing. At this time, the seat tube 1, connector 11, left front fork tube 12, left connecting claw 13, right front fork tube 14 and right connecting claw 15 are combined into a whole. Then, install the front wheel between the left front fork tube 12 and the right front fork tube 14, and pass the front wheel axle through the connecting holes opened on the side walls of the left connecting claw 13 and the right connecting claw 15. Tighten the axle nut with a wrench to install the front wheel on the frame fork. During riding, the reinforcement assembly will enhance the sturdiness of the seat tube 1, while the protective assembly will block external mud, sand and other dust from the outside of the connecting holes. Insert the seat tube 1 into the connector 11, because the first serrated retaining strip 2 and the second serrated retaining strip 21 are set accordingly. At this time, the multiple first serrated retaining strips 2 on the side wall of the riser 1 will engage with the multiple second serrated retaining strips 21 on the inner side wall of the connector 11. Then, adhesive is sprayed onto the connection between the riser 1 and the connector 11. The adhesive will be evenly applied between the multiple first serrated retaining strips 2 and the second serrated retaining strips 21. After the multiple main reinforcing ribs 3 and secondary reinforcing ribs 31 are fixed together, they are inserted into the riser 1. Then, the pouring layer 32 is poured into the riser 1. Layer 32 will fill between the riser 1, main reinforcing rib 3 and secondary reinforcing rib 31. After solidification and drying, the frame fork will be assembled. Sufficient lubricant will be injected into the oil reservoir 41 through the inlet pipe 42 beforehand. When the wheel axle is bumpy, it will squeeze the oil reservoir 41 upward, causing the lubricant inside the oil reservoir 41 to overflow and coat the surface of the wheel axle. During riding, the dustproof pad 5 covering the outside of the connection hole will block the mud and sand and other dust splashed on the road from the outside of the connection hole.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-reliability frame fork, comprising a seat tube (1), characterized in that: A connector (11) is inserted into the bottom end of the riser (1). A connecting assembly is provided between the connector (11) and the riser (1). A left front fork tube (12) is fixedly connected to the middle of the side wall of the connector (11). A left connecting claw (13) is connected to the bottom of the left front fork tube (12). The left connecting claw (13) and the left front fork tube (12) are glued together. A right front fork tube (14) is fixedly connected to the middle of the side wall of the connector (11). A right connecting claw (15) is connected to the bottom of the right front fork tube (14). The right connecting claw (15) and the right front fork tube (14) are glued together. The left front fork tube (12) and the right front fork tube (14) are respectively arranged. The left connecting claw (13) and the right connecting claw (15) are respectively arranged. The left connecting claw (13) and the right connecting claw (15) are both provided with connecting holes in the middle of their side walls. The left connecting claw (13) and the right connecting claw (15) are both provided with protective components on both sides. The protective components are covered outside the connecting holes. The middle of the inner side wall of the riser tube (1) is provided with a reinforcing component.

2. The high-reliability frame fork according to claim 1, characterized in that: The connecting assembly includes a plurality of first serrated clips (2), which are fixed on the side wall of the riser (1). The plurality of first serrated clips (2) are evenly arranged at the bottom end of the riser (1). A plurality of second serrated clips (21) are fixed in the middle of the inner side wall of the connector (11). The second serrated clips (21) and the first serrated clips (2) are correspondingly arranged. Adhesive is filled between the first serrated clips (2) and the second serrated clips (21).

3. The high-reliability frame fork according to claim 1, characterized in that: The reinforcement assembly includes multiple main reinforcing ribs (3), which are installed inside the riser (1). Multiple secondary reinforcing ribs (31) are installed in the middle of the inner wall of the riser (1). The secondary reinforcing ribs (31) and the main reinforcing ribs (3) are fixed together. A casting layer (32) is filled between the main reinforcing ribs (3) and the riser (1).

4. A high-reliability frame fork according to claim 1, characterized in that: A shock-absorbing pad (4) is fixed in the middle of the inner sidewall of the connecting hole. The shock-absorbing pad (4) is made of elastic material. An oil reservoir (41) is fixed in the middle of the inner sidewall of the connecting hole. The oil reservoir (41) is located above the shock-absorbing pad (4). An inlet pipe (42) is connected to the middle of the sidewall of the oil reservoir (41). Both the oil reservoir (41) and the inlet pipe (42) are made of elastic material.

5. A high-reliability frame fork according to claim 1, characterized in that: The protective assembly includes multiple dust pads (5), which are fixed on both sides of the left connecting claw (13) or the right connecting claw (15). The dust pads (5) cover the outside of the connecting hole and are made of deformable material.

6. A high-reliability frame fork according to claim 3, characterized in that: A full-go stop bolt (6) is installed between the riser (1), the connector (11) and the right front fork tube (14), and the full-go stop bolt (6) is glued together inside the riser (1) and the right front fork tube (14).

7. A high-reliability frame fork according to claim 6, characterized in that: The riser (1), connector (11), left front fork tube (12), left connecting claw (13), right front fork tube (14) and right connecting claw (15) are all coated with an anti-corrosion and anti-rust layer.

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