WO2016188338A1

WO2016188338A1 - High-strength wheel spoke

Info

Publication number: WO2016188338A1
Application number: PCT/CN2016/082169
Authority: WO
Inventors: 樊飞
Original assignee: 天津市万华车料有限公司
Priority date: 2015-05-25
Filing date: 2016-05-16
Publication date: 2016-12-01
Also published as: CN104943465A

Abstract

A high-strength wheel spoke, comprising a spoke bar (1), a threaded portion at one end of the spoke bar (1), and a bent portion, a neck portion and a spoke cap (5) at the other end of the spoke bar, as well as diameter increasing portions (2, 3) of the neck portion and the bent portion, wherein a spoke bar diameter increasing portion (1-1) is provided on a junction between the spoke bar (1) and the bent portion, and diameter reducing joint portions (4) are separately arranged between the neck portion diameter increasing portion (3) and the spoke cap (5) and between the spoke bar diameter increasing portion (1-1) and the spoke bar (1). By sufficiently considering practical problems of most obvious frictional damage and likeliness in breaking at the junction between a spoke bar (1) and a bent portion during an application process of the wheel spoke, the diameter increasing portion is arranged on the junction, thereby remarkably relieving the easy-to-break phenomenon caused by the most obvious frictional damage to the junction by arranging the diameter increasing portion; and the tensile strength of the spoke of the same specification is obviously better than that of an ordinary hard steel spoke. The wheel spoke is obtained with a mold pressing method, and a spoke cap (5) and various diameter increasing portions are simultaneously molded by means of the pressing of two molds, thereby having the outstanding advantage of remarkably improving the strength of the spoke.

Description

High-strength wheel spokes

Technical field

The invention belongs to bicycle spokes, and in particular to a high-strength wheel spoke.

Background technique

The spokes are composed of a rod, a threaded portion at one end of the rod, and a bent portion and a strip cap at the other end of the rod. The spokes are widely used for spoke wheels such as bicycles, motorcycles, and tricycles.

The current bicycle spoke standard divides spokes into ordinary spokes and special-shaped spokes. The general spokes are set to No. 12, 13, 14, and 15. The standard has made spoke materials, spokes of various specifications, and cutting strength. Clearly defined.

Generally, the choice of spoke specifications is determined based on the vehicle model, maximum bearing capacity and safety factor.

However, the spoke wheels of the above various types of vehicles sometimes occur when the process breaks the strip, especially when the joint between the bar and the bent portion is concentrated. The root cause of the above-mentioned part being easily broken by destructive vibration and tensile test is that the friction damage of the part and the hub is the most obvious.

In the invention patent No. CN100395051C, the method of strengthening the structural strength of bicycles and locomotive spokes, it is considered that the spokes will break first in the neck, so mechanical processing is used to improve the structural strength of the neck and the bent portion of the spoke body. That is, the wire diameter of the neck and the bent portion is increased, and the proportion thereof is increased by 1.15 times. The neck of the invention patent refers to the portion between the cap and the bent portion.

In the above invention patent, in the increase of the wire diameter of the spoke neck and the bent portion, there is a defect that the joint portion of the bar and the bent portion is not easy to be broken by the friction damage.

Summary of the invention

The present invention is to solve the technical problem that the wire diameter of the spoke neck and the bent portion cannot be compensated for the frictional damage caused by the joint of the bar and the bending portion, and a high-strength wheel spoke is disclosed.

The present invention adopts the following technical solution for achieving the above object: a high-strength wheel spoke, including a bar and a bar a threaded portion of the end, a bent portion at the other end of the bar, a neck portion and a cap, a neck portion, and an enlarged portion of the bent portion, wherein the joint portion of the bar and the bent portion is provided with a bar diameter The enlarged portion, the reduced diameter connecting portion between the neck diameter increasing portion and the strip cap, and the bar diameter increasing portion and the bar are respectively provided.

The present invention can also take the following technical measures:

The diameter of the bar diameter increasing portion, the neck diameter increasing portion, and the bent portion diameter increasing portion is 1.151 - 1.16 times the bar diameter.

The surface of the bar diameter increasing portion, the neck diameter increasing portion, and the bent portion diameter increasing portion are smoothly connected.

One side of the bar is provided with equally spaced flat recesses, the width of the flat recess is larger than the diameter of the bar, and the equally spaced flat recesses are disposed on the side of the bar opposite to the strip cap.

The symmetrical sides of the bar are provided with a symmetrical arc surface having a width larger than the diameter of the bar, and the height between the arc tops of the symmetrical arc faces is smaller than the diameter of the bar, and the arc top direction of the one side arc face is consistent with the direction of the bar cap.

The symmetrical sides of the bar are provided with a symmetry plane having a width greater than the diameter of the bar, and the height between the symmetry planes is smaller than the diameter of the bar, and the vertical direction of one side plane is consistent with the direction of the bar cap.

The beneficial effects and advantages of the present invention are that the high-strength wheel spokes improve the tensile strength of the spoke neck and the bent portion, and fully consider the friction damage of the joint between the bar and the bent portion during the use of the spoke. The practical problem of easy fracture is to provide a diameter increasing portion at the joint portion, and the arrangement of the diameter increasing portion remarkably improves the fragile phenomenon which is most conspicuous due to the friction damage of the portion. Taking the No.14 ordinary hard steel spokes as an example to illustrate the results of the limit simulation experiment, the No14 rod diameter is 1.96mm, the diameter of each diameter increasing part is 2.27mm (1.158 times), and when the pulling force reaches 3980N (kgf), the rod is combined with the bending part. The diameter of the enlarged part is broken, and the tensile strength of the spokes of the same specification is obviously superior to that of the ordinary hard steel spokes. The limit simulation results of other common hard steel bicycle spokes and motorcycle spokes are similar. The invention is obtained by a die stamping method, and the strip cap and the enlarged diameter portions are simultaneously formed by stamping two sets of molds. The present invention has the outstanding advantage of significantly increasing spoke strength.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of Embodiment 1 of the present invention.

Figure 2 is a schematic view showing the structure of Embodiment 2 of the present invention.

Figure 3 is a view from the direction of Figure 2A.

Figure 4 is a schematic view showing the structure of Embodiment 3 of the present invention.

Figure 5 is an enlarged view of Figure 4A-A.

Figure 6 is a schematic view showing the structure of Embodiment 4 of the present invention.

Figure 7 is an enlarged view of Figure 6A-A.

Marked in the figure: 1 bar, 1-1 bar diameter increase, 1-2 flat recess, 1-3 symmetrical arc, 1-4 symmetry plane, 2 bend bend diameter increase, 3 neck diameter Increased part, 4 reduced diameter joints, 5 caps.

detailed description

The invention will now be further described with reference to the embodiments and the accompanying drawings.

Embodiment 1 of the present invention, a high-strength wheel spoke, comprising a bar 1, a threaded portion at one end of the bar, a bent portion at the other end of the bar, a neck and a cap 5, the present invention is in the spoke The neck portion is provided with a neck diameter increasing portion 3, and the bent portion is provided with a bent portion diameter increasing portion 2, and at the same time, a bar diameter increasing portion 1-1 is provided at a joint portion of the bar 1 and the bent portion. Between the portion diameter increasing portion 3 and the strip cap 5, between the strip diameter increasing portion 1-1 and the rod 1, respectively, a reduced diameter engaging portion 5, a bar diameter increasing portion 1-1, and a neck diameter are provided. The enlarged portion 3 and the surface of the bent portion diameter increasing portion 2 are smoothly connected.

The diameter of the bar diameter increasing portion 1-1, the neck diameter increasing portion 3, and the bent portion diameter increasing portion 2 of the embodiment 1 of Fig. 1 is 1.151 - 1.16 times the diameter of the bar 1, and the multiple is Based on the standard diameter of spoke bars of various specifications. For example, the bicycle No14 spoke bar has a standard diameter of 1.96 mm, a 1.151 times of 2.25 mm, and a 1.16 times of 2.27 mm. The No13 spoke bar has a standard diameter of 2.3 mm, 1.15 times is 2.65 mm, and 1.16 times is 2.67 mm.

The bending angle α of the bent portion of the first embodiment of Fig. 1 is 95°.

As shown in FIG. 2 and FIG. 3, the second embodiment is based on the structure of the embodiment 1 of FIG. 1, and is provided on the side of the bar 1 with equally spaced flat recesses 1-2. The width of the flat recesses is larger than that of the strips. The diameter of the rod 1, the equal interval flat recess Place it on the side of the bar opposite the direction of the cap. The flat recess 1-2 of the second embodiment has a scintillating light effect when the wheel is rotated.

As shown in FIG. 4 and FIG. 5, the embodiment 3 is based on the structure of the embodiment 1 of FIG. 1, and symmetric grooves 1-3 having a width larger than the diameter of the bar 1 are provided on both sides of the bar 1 symmetrically. The height between the arc tops of the symmetrical curved faces 1-3 is smaller than the diameter of the bar 1 , and the arc top direction of one side of the arc faces coincides with the direction of the bar cap. The symmetrical cam faces 1-3 of Embodiment 3 can reduce the spoke resistance. As shown in FIG. 6 and FIG. 7 , the embodiment 4 is based on the structure of the embodiment 1 of FIG. 1 , and symmetric planes 1-4 having a width larger than the diameter of the bar 1 are symmetrically disposed on both sides of the bar 1 and are symmetric. The height between planes 1-4 is smaller than the diameter of the bar, and the vertical direction of one plane coincides with the direction of the cap. The symmetry planes 1-4 of Embodiment 4 can reduce the spoke resistance.

Claims

High-strength wheel spokes, including a bar, a threaded portion at one end of the bar, a bent portion at the other end of the bar, a neck and a cap, a neck and an enlarged portion of the bent portion, characterized in that: The joint portion of the rod and the bent portion is provided with a bar diameter increasing portion, and the reduced diameter connecting portion is respectively provided between the neck diameter increasing portion and the strip cap, and the bar diameter increasing portion and the bar.
The high-intensity wheel spoke according to claim 1, wherein the diameter of the bar diameter increasing portion, the neck diameter increasing portion, and the bent portion diameter increasing portion is 1.151 to 1.6 times the diameter of the bar.
The high-intensity wheel spoke according to claim 1, wherein the surface of the bar diameter increasing portion, the neck diameter increasing portion, and the bent portion diameter increasing portion are smoothly connected.
The high-intensity wheel spoke according to claim 1, wherein one side of the bar is provided with equally spaced flat recesses, the width of the flat recess is larger than the diameter of the bar, and the equally spaced flat recesses are disposed on the strip. The side of the bar with the opposite direction of the cap.
The high-intensity wheel spoke according to claim 1, wherein the symmetrical sides of the bar are provided with a symmetrical curved surface having a width larger than the diameter of the bar, and the height between the arc tops of the symmetrical curved surface is smaller than the diameter of the bar The arc top direction of one side of the arc is consistent with the direction of the cap.
The high-intensity wheel spoke according to claim 1, wherein the symmetrical sides of the bar are provided with a symmetry plane having a width larger than the diameter of the bar, and the height between the symmetry planes is smaller than the diameter of the bar, and the one side is flat. The direction of the vertical line is the same as the direction of the cap.