TWI891165B - Spoke - Google Patents

Abstract

The invention pertains to a spoke, comprising a strip body and two connecting parts. The elongated body consists of a first columnar body and two second columnar bodies extending from opposite ends of the first columnar body. The cross-sectional outline of the first columnar body is non-circular, differing from the cross-sectional profile of each second columnar body. Each connecting member features a socket hole extending along a specified direction, which accommodates the second columnar body and a portion of the first columnar body. Importantly, the socket hole does not penetrate the connector in the vertical direction of the specified orientation. The hole wall surrounding the socket hole is entirely covered in the vertical direction of the specified orientation, ensuring improved bonding stability and strength for the portion of the first columnar body.

Description

Radius

The present invention relates to bicycles, and more particularly to a spoke.

Bicycles can also be called bicycles, bikes, or even iron horses. With continuous improvements in the industry, bicycle transmission efficiency is becoming increasingly better, and the number of gear shifts available is increasing. At the same time, the frame structure is becoming more ergonomic, making it easy for adults, children, and the elderly to ride and use them. Bicycles have become a part of our daily lives, not only for daily transportation but also for fitness, exercise, and competition.

A bicycle has numerous structural systems, including the frame, steering system, transmission, braking system, and wheel system. The wheel system is centered around the spokes, which connect the rim to the hub. They effectively bear radial loads and internally support the tire to maintain its shape. Furthermore, the number, shape, and material of the spokes affect wind resistance during riding, resulting in varying riding speeds and stability.

However, most technical experts focus on improving the frame, transmission system, and brake system, often ignoring the importance of the spokes and failing to make further improvements and upgrades. Therefore, it is necessary to provide a novel and progressive spoke.

The main purpose of the present invention is to provide a radial that can effectively improve structural strength and bonding stability.

To achieve the above-mentioned objectives, the present invention provides a radial comprising: an elongated body and two connecting members. The elongated body comprises a first column and two second columns, the two second columns protruding from opposite ends of the first column, the first column having a non-circular cross-sectional profile that is different from the cross-sectional profile of each of the second columns; each connecting member comprises a socket extending along a first direction, the socket socket being adapted to receive the second column and a portion of the first column, and the socket does not extend through the connecting member perpendicular to the first direction, such that a wall surrounding the socket completely covers a portion of the first column perpendicular to the first direction.

The following examples are merely illustrative of possible implementations of the present invention, and are not intended to limit the scope of protection of the present invention. The words "one" or "at least one" preceding the terms mentioned herein do not limit the quantity, and the number may be "plural" as needed. Such variations in quantity also fall within the scope of protection, and are therefore described above.

Please refer to Figures 1 to 5, which show an embodiment of the present invention. The radial of the present invention includes: a long strip body 1 and two connecting parts 2.

The elongated body 1 includes a first column 11 and two second columns 12. The two second columns 12 protrude from opposite ends of the first column 11. The cross-sectional profile of the first column 11 is non-circular and different from the cross-sectional profiles of the second columns 12.

More specifically, the maximum outer diameter of each second column 12 is smaller than the maximum outer diameter of the first column 11 to ensure that the radial remains compact and lightweight after the second column 12 is coupled to the connector 2. Practical testing has shown that the ratio of the maximum outer diameter of each second column 12 to the maximum outer diameter of the first column 11 is between 0.2 and 0.5, achieving both the aforementioned advantages and structural strength. In this embodiment, the maximum outer diameter of each second column 12 is no greater than the minimum outer diameter of the first column 11.

More specifically, the cross-sectional profile of the first column 11 is olive-shaped (or eye-shaped, or cat's-eye-shaped), while the cross-sectional profile of the second column 12 is circular. The olive-shaped first column 11 is streamlined, with smaller windward areas at both ends to facilitate smooth air flow and reduce wind resistance. The thicker middle structure ensures structural strength to withstand heavier loads, while the circular second column 12 provides a more comprehensive and uniform contact area for coupling with the connector 2, effectively improving coupling stability and evenly transmitting force. In this embodiment, the first column 11 includes two arc surfaces 111 and two cutting edges 112. The two arc surfaces 111 are symmetrically arranged to guide airflow. The two ends of one arc surface 111 intersect with the two ends of the other arc surface 111 to form the two cutting edges 112. The two cutting edges 112 are used to break the air.

Each of the connectors 2 includes a sleeve hole 21 extending along a first direction 3. The sleeve hole 21 sleeves onto portions of the second column 12 and the first column 11. The sleeve hole 21 does not penetrate the connector 2 in a direction perpendicular to the first direction 3. A hole wall 24 surrounding the sleeve hole 21 completely covers a portion of the first column 11 in a direction perpendicular to the first direction 3. This allows the connector 2 and the first column 11 to have a larger contact area, thereby improving the stability of the connection and having the advantage of evenly distributing the force.

Specifically, each connector 2 includes a head portion 22 and a body portion 23 connected to each other. The sleeve hole 21 extends from the end surface of the head portion 22 to the body portion 23 along the first direction 3. The outer diameter of the head portion 22 is larger than the outer diameter of the body portion 23. The head portion 22 is sleeved on the first columnar body 11. The larger head portion 22 can provide a stronger structural strength at the joint between the connector 2 and the elongated body 1 to withstand external forces.

Specifically, the sleeve hole 21 includes a first diameter section 211 and a second diameter section 212 that are connected to each other. The first diameter section 211 is larger than the second diameter section 212. A step 213 is formed at the connection between the first diameter section 211 and the second diameter section 212. The first diameter section 211 accommodates a portion of the first columnar body 11, and the second diameter section 212 accommodates the second columnar body 12. The step 213 abuts against the end surface of the first columnar body 11. The hole wall 24 contacts the elongated body 1 in a direction perpendicular to the first direction 3, while the step 213 contacts the elongated body 1 in the first direction 3. As a result, the connector 2 can contact and abut against the elongated body 1 in different directions, thereby achieving better connection stability and avoiding stress concentration points and breakages.

Preferably, the ratio of the length of the first path segment 211 to the length of the second path segment 212 is between 0.1 and 0.3, and the connecting member 2 can achieve an appropriate ratio between the length of the elongated body 1 covered in the first direction 3 and the width of the elongated body 1 covered perpendicular to the first direction 3.

Another preferred embodiment is that the sleeve hole 21 defines a gap 41 with the first column 11 and the second column 12 in a direction perpendicular to the first direction 3. The gap 41 is filled with an adhesive 42, which can further strengthen the bonding strength between the connector 2 and the strip 1.

Another preferred embodiment is that the sleeve hole 21 passes through the connector 2 along the first direction 3 to facilitate rapid manufacturing; wherein, the second column 12 does not protrude from the sleeve hole 21, and the length of the second column 12 is equal to the length of the second diameter section 212.

More preferably, each of the connecting parts 2 is integrally formed by forging to have better structural strength and structural continuity.

1: Rectangular body 11: First cylindrical body 111: Arc surface 112: Second cutting edge 12: Second cylindrical body 2: Connector 21: Socket hole 211: First diameter segment 212: Second diameter segment 213: Step 22: Head 23: Body 24: Hole wall 3: First direction 41: Gap 42: Adhesive

Figure 1 is a perspective view of an embodiment of the present invention. Figure 2 is an exploded view of Figure 1. Figure 3 is a longitudinal section of Figure 1. Figure 4 is an enlarged view of a portion of Figure 3. Figure 5 is a cross-sectional view of Figure 1.

11: First column 2: Connector 22: Head 23: Body

Claims (10)

A radial comprises: A strip body comprising a first column and two second columns, the two second columns protruding from opposite ends of the first column, the first column having a non-circular cross-sectional profile that is different from the cross-sectional profile of each of the second columns; and Two connecting members, each including a socket extending along a first direction, the socket socket being adapted to receive the second column and a portion of the first column, and the socket not extending through the connecting member perpendicular to the first direction. A wall surrounding the socket completely covers a portion of the first column perpendicular to the first direction. The radial of claim 1, wherein the maximum outer diameter of each second column is smaller than the maximum outer diameter of the first column. The radial of claim 2, wherein the maximum outer diameter of each second column is no greater than the minimum outer diameter of the first column. A radial as described in claim 2, wherein each connecting member includes a head and a body connected to each other, the sleeve hole extends from the end face of the head along the first direction to the body, the outer diameter of the head is larger than the outer diameter of the body, and the head is sleeved on the first column. A radial as described in claim 4, wherein the socket hole includes a first diameter segment and a second diameter segment connected to each other, the first diameter segment is larger than the second diameter segment, and a step is formed at the connection between the first diameter segment and the second diameter segment, the first diameter segment accommodates a portion of the first columnar body, the second diameter segment accommodates the second columnar body, and the step abuts against the end face of the first columnar body. A spline as described in claim 1, wherein the sleeve hole defines a gap with the first column and the second column in a direction perpendicular to the first direction, and the gap is filled with an adhesive. A radial as described in claim 1, wherein the socket hole passes through the connecting member along the first direction. The radial as described in claim 1, wherein the cross-sectional profile of the first column is olive-shaped and the cross-sectional profile of the second column is circular. A radial as described in any one of claims 1 to 8, wherein each of the connecting parts is integrally formed by forging. The radial as described in claim 5, wherein the maximum outer diameter of each second column is not greater than the minimum outer diameter of the first column; the sleeve hole defines a gap with the first column and the second column in a direction perpendicular to the first direction, and the gap is filled with an adhesive; the sleeve hole passes through the connecting member along the first direction; the cross-sectional profile of the first column is olive-shaped, and the cross-sectional profile of the second column is circular; each connecting member is integrally formed by forging; the second column The first cylindrical body does not protrude from the sleeve hole, and the length of the second cylindrical body is equal to the length of the second diameter segment; the first cylindrical body includes two arc surfaces and two cutting edges, the two arc surfaces are symmetrically arranged, and the two ends of one arc surface intersect with the two ends of the other arc surface to form the two cutting edges; the ratio of the length of the first diameter segment to the length of the second diameter segment is between 0.1 and 0.3; and the ratio of the maximum outer diameter of each second cylindrical body to the maximum outer diameter of the first cylindrical body is between 0.2 and 0.5.