A break-proof spoke cap

Abstract

The utility model discloses a kind of anti-fracture spoke caps, including stem and the head portion of being arranged in stem one end, stem is inserted from the outside of spoke cap jackhole of rim, head portion keeps in the outside of spoke cap jackhole, the end of stem away from head portion is equipped with the screw hole for connecting spoke, both ends of spoke cap jackhole are equipped with bowl-shaped contact surface, first elastic ring is arranged between head portion and the contact surface of outside, retaining ring is equipped on stem, second elastic ring is arranged between retaining ring and the contact surface of inside.The utility model is equipped with two elastic rings, elastic ring and the contact between spoke cap jackhole of rim is carried out through bowl-shaped contact surface, on the one hand, elastic ring can buffer the impact between head portion and rim when rim occurs elastic deformation, on the other hand, mobile guide can be carried out, so that spoke cap is always moved to the center direction of spoke cap jackhole in the process of rim elastic deformation occurs and recovers, avoid spoke cap and contact rim fracture after lateral deviation.

Description

Technical Field

[0001] This utility model relates to the field of spoke cap technology, specifically to a spoke cap that is resistant to breakage. Background Technology

[0002] In a spoked bicycle wheel, each individual spoke is secured to the rim by a corresponding spoke cap. The spoke cap is a component with a stem and a head protruding from the stem; the stem has threads that connect to the spoke. The rim has multiple spoke cap insertion holes. The stem of the spoke cap is inserted into each hole radially outward, while the protruding head remains external, tightening the spoke through the threads. The other end of the spoke hooks onto the hub. In this way, the spoke cap hooks the spoke to the rim and allows for spoke tension. During bicycle operation, the rim undergoes elastic deformation, resulting in friction and impact between the spoke cap and the rim. This phenomenon is particularly pronounced on high-performance bicycles such as racing bicycles, increasing the risk of spoke cap breakage. Therefore, a spoke cap design is needed to improve the contact between the spoke cap and the rim and alleviate the stress on the spoke cap. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a spoke cap that prevents breakage.

[0004] Technical solution:

[0005] A spoke cap designed to prevent breakage includes a rod and a head disposed at one end of the rod. The rod is inserted from the outside of a spoke cap insertion hole in a wheel rim, and the head remains outside the spoke cap insertion hole. The end of the rod away from the head has a threaded hole for connecting spokes. Both ends of the spoke cap insertion hole have bowl-shaped contact surfaces. A first elastic ring is disposed between the head and the outer contact surface. A retaining ring is disposed on the rod, and a second elastic ring is disposed between the retaining ring and the inner contact surface. An O-ring is disposed on the rod between the first and second elastic rings.

[0006] Furthermore, the end of the head away from the rod is provided with a rotating hole or a rotating part.

[0007] Furthermore, multiple protruding blocks are evenly distributed on the rod body, the outer edge of the blocks does not exceed the outer edge of the spoke cap insertion hole, the center of the retaining ring is provided with a through hole corresponding to the rod body, and the retaining ring is provided with a notch corresponding to the blocks, the notch communicating with the through hole.

[0008] Furthermore, the retaining ring is provided with a slot for a corresponding stop block on the side away from the head, and the slot is located in the middle of two adjacent notches.

[0009] Furthermore, the first elastic ring and the second ring body are provided with through holes for corresponding stops.

[0010] Furthermore, the rod body is provided with an annular groove, and the O-ring is fitted inside the annular groove.

[0011] Furthermore, the rod body has a square cutting surface on the curved surface away from the head.

[0012] Beneficial effects:

[0013] This invention provides a spoke cap designed to prevent breakage. It features two elastic rings that contact the spoke cap insertion hole on the rim via a bowl-shaped contact surface. The elastic rings buffer the impact between the spoke cap and the rim during elastic deformation, and also guide its movement. This ensures that the spoke cap always moves towards the center of the insertion hole during the elastic deformation and recovery process of the rim, preventing lateral displacement and subsequent breakage upon contact with the rim. Additionally, an O-ring is provided, which contacts the middle section of the spoke cap insertion hole, reducing friction and further lowering the risk of spoke cap breakage. Attached Figure Description

[0014] Figure 1 This is a perspective view of the spoked cap of this utility model from one angle; Figure 2 This is a perspective view of the spoke cap of this utility model from another angle; Figure 3 This is a schematic diagram of the mating structure of the spoke cap and the wheel rim of this utility model; Figure 4 This is a schematic diagram of the retaining ring of this utility model.

[0015] 1. Rod body, 2. Head, 3. Wheel rim, 4. Spoke cap insertion hole, 5. Threaded hole, 6. First elastic ring, 7. Retaining ring, 8. Second elastic ring, 9. O-ring, 10. Rotating part, 11. Stop block, 12. Cutting surface, 41. Contact surface, 71. Through hole, 72. Notch, 73. Slot. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings.

[0017] As attached Figure 1 To be continued Figure 4 . Specific implementation examples:

[0019] A spoke cap designed to prevent breakage includes a rod body 1 and a head 2 located at one end of the rod body 1. The rod body 1 is generally a cylinder with uniform radial dimensions or a combination of multiple cylinders of different dimensions. The rod body 1 is inserted into the spoke cap insertion hole 4 of the rim 3 from the outside. The head 2 remains outside the spoke cap insertion hole 4. The end of the rod body 1 away from the head 2 is provided with a threaded hole 5 for connecting spokes. Both ends of the spoke cap insertion hole 4 are provided with a bowl-shaped contact surface 41, which can be a conical surface or... This is a type of spherical surface that exhibits a radial dimension reduction trend from both ends towards the middle. A first elastic ring 6 is provided between the head 2 and the outer contact surface 41. A retaining ring 7 is provided on the rod body 1. A second elastic ring 8 is provided between the retaining ring 7 and the inner contact surface 41. Both the first elastic ring 6 and the second elastic ring 8 are tightly fitted to the contact surface 41. An O-ring 9 is provided on the rod body 1 between the first elastic ring 6 and the second elastic ring 8. The O-ring 9 abuts against the middle section of the spoke cap insertion hole 4, which is a cylindrical hole.

[0020] When the rim 3 undergoes elastic deformation, it compresses one side of the spokes, causing the spokes and spoke caps on the compressed side to move inward, while the spokes and spoke caps on the opposite side extend outward. The spoke caps move like pistons within the spoke cap insertion hole 4. This invention is equipped with a first elastic ring 6 and a second elastic ring 8, which can prevent the rod 1 and head 2 from directly contacting the rim 3, providing an effective buffering effect and preventing spoke cap breakage. If the spoke cap's movement amplitude is small, neither the first elastic ring 6 nor the second elastic ring 8 will completely disengage from the groove formed by the bowl-shaped contact surface 41. Due to its special bowl-shaped structure, if the first elastic ring 6 disengages from the corresponding contact surface 41, the second elastic ring 8 on the other side will press against the contact surface 41 and will move towards the center during movement. The probability of the spoke cap deviating from its initial angle is small, and the rod 1 between the first elastic ring 6 and the second elastic ring 8 will basically not contact the inner wall of the spoke cap insertion hole 4. However, it cannot be ruled out that wheel rim 3 may experience elastic deformation far exceeding expectations, so an O-ring 9 was further added for this purpose.

[0021] The head 2, at the end furthest from the rod 1, has a rotating hole or rotating part 10, typically a non-circular structure such as square or hexagonal. This is used to rotate the spoke cap, thereby tensioning the spokes via threads to complete the spoke installation.

[0022] Multiple protruding blocks 11 are evenly distributed on the rod body 1. The outer edge of the block 11 does not exceed the outer edge of the spoke cap insertion hole 4, that is, the block 11 does not affect the rod body 1 from passing through the spoke cap insertion hole 4. The center of the retaining ring 7 is provided with a through hole 71 corresponding to the rod body 1. The retaining ring 7 is provided with a notch 72 corresponding to the block 11. The notch 72 is connected to the through hole 71.

[0023] Preferably, the retaining ring 7 is provided with a slot 73 corresponding to the stop block 11 on the side away from the head 2. The slot 73 is located in the middle of two adjacent notches 72. The through hole 71 and notch 72 of the retaining ring 7 are aligned with the rod body 1 and the stop block 11 respectively and inserted from the side away from the head 2. After passing the stop block 11, the retaining ring 7 is rotated to align the slot 73 with the stop block 11 and complete the snap-fit ​​fixation.

[0024] Preferably, the first elastic ring 6 and the second elastic ring 8 are provided with corresponding through holes for the stop 11, which does not affect their insertion from the side away from the head 2. The rod body 1 is also provided with an annular groove, and an O-ring is fitted in the annular groove. The O-ring is an elastic ring, which can be inserted through the stop 11 after being stretched.

[0025] Preferably, a square cutting surface 12 is provided on the curved surface of the rod body 1 away from the head 2. The function of the cutting surface 12 is the same as that of the rotating part 10, which is used to rotate the entire spoke cap to tension the spokes. That is, both the inner and outer sides of the wheel rim 3 can be used to operate and rotate the spoke cap, which is convenient for installation.

[0026] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection of the claims of this application.

Claims

1. A spoke cap designed to prevent breakage, comprising a rod body and a head disposed at one end of the rod body, the rod body being inserted from the outside of a spoke cap insertion hole in a wheel rim, the head remaining outside the spoke cap insertion hole, and the end of the rod body away from the head having a threaded hole for connecting a spoke, characterized in that, Both ends of the spoke cap insertion hole are provided with bowl-shaped contact surfaces. A first elastic ring is provided between the head and the outer contact surface. A retaining ring is provided on the rod body. A second elastic ring is provided between the retaining ring and the inner contact surface. An O-ring is provided on the rod body between the first elastic ring and the second elastic ring.

2. The spoke cap for preventing breakage according to claim 1, characterized in that, The head is provided with a rotating hole or rotating part at the end away from the rod.

3. The spoke cap for preventing breakage according to claim 1, characterized in that, Multiple protruding blocks are evenly distributed on the rod body. The outer edge of the block does not exceed the outer edge of the spoke cap insertion hole. The center of the retaining ring is provided with a through hole corresponding to the rod body. The retaining ring is provided with a notch corresponding to the block. The notch communicates with the through hole.

4. A spoke cap for preventing breakage according to claim 3, characterized in that, The retaining ring also has a slot for a corresponding stop block on the side away from the head, and the slot is located in the middle of two adjacent notches.

5. A spoke cap designed to prevent breakage according to claim 3 or 4, characterized in that, The first elastic ring and the second ring body are provided with through holes for corresponding stops.

6. A spoke cap for preventing breakage according to claim 1, characterized in that, The rod body is provided with an annular groove, and the O-ring is fitted inside the annular groove.

7. A spoke cap designed to prevent breakage according to claim 1 or 6, characterized in that, The rod has a square cutting surface on the curved surface away from the head.

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