阅读说明：本技术 自行车轮毂心轴结构 (Bicycle hub spindle structure ) 是由 谢宜仓 于 2018-07-25 设计创作，主要内容包括：本发明提供一种自行车轮毂心轴结构,其主要包括一第一轴段及一第二轴段,第一轴段由一第一材质制成,第一轴段供以穿设于一齿盘座；第二轴段由一第二材质制成,第一材质强度较第二材质的强度高,第一轴段的其中一端与第二轴段的其中一端结合,由此,本发明自行车轮毂心轴由第一轴段及一第二轴段组合而成,而非采取一体成形的方式制成完整的心轴,且该第一轴段的强度较第二轴段的强度高,让供以穿设于该齿盘座的第一轴段具有较高的结构强度,进而达到提高自行车轮毂心轴结构强度的目的,提升对于齿盘座的承载能力。(The invention provides a bicycle hub spindle structure, which mainly comprises a first shaft section and a second shaft section, wherein the first shaft section is made of a first material and is used for penetrating through a gear plate seat; the second shaft section is made of a second material, the strength of the first material is higher than that of the second material, one end of the first shaft section is combined with one end of the second shaft section, therefore, the bicycle hub mandrel is formed by combining the first shaft section and the second shaft section instead of manufacturing the complete mandrel in an integrated forming mode, and the strength of the first shaft section is higher than that of the second shaft section, so that the first shaft section penetrating through the gear plate seat has higher structural strength, the purpose of improving the structural strength of the bicycle hub mandrel is further achieved, and the bearing capacity of the gear plate seat is improved.)

1. A bicycle hub spindle structure, comprising:

the first shaft section is made of a first material and is provided for penetrating through a fluted disc seat, the first shaft section is a hollow cylinder and is provided with a first end and a second end which are opposite, and the first shaft section is provided with a first through hole penetrating through the first end and the second end;

the second shaft section is made of a second material, the strength of the first material is higher than that of the second material, the second shaft section is a hollow cylinder and is provided with a third end and a fourth end which are opposite to each other, the second shaft section is provided with a second through hole which penetrates through the third end and the fourth end, and the second end of the first shaft section is combined with the third end of the second shaft section to enable the first through hole and the second through hole to be communicated.

2. The bicycle hub spindle structure according to claim 1, wherein the first material is an iron alloy and the second material is an aluminum alloy or a titanium alloy material.

3. The bicycle hub spindle arrangement of claim 1, wherein the first shaft segment has an outer surface facing away from the first bore, the outer surface of the first shaft segment at the second end has a first threaded portion, the second shaft segment has an inner surface facing the second bore, the inner surface of the second shaft segment at the third end has a second threaded portion, the second end of the first shaft segment is inserted into the third end of the second shaft segment, and the first threaded portion and the second threaded portion are engaged with each other.

4. The bicycle hub spindle arrangement of claim 1, wherein the first shaft segment has a first threaded portion, the second shaft segment has a second threaded portion, the first threaded portion is located on a side of the first shaft segment facing the first through hole, the first threaded portion is located at the second end, the second threaded portion is located on a side facing away from the second through hole, the second threaded portion is located at the third end, the third end of the second shaft segment is inserted into the second end of the first shaft segment, and the first threaded portion and the second threaded portion are engaged with each other.

5. The bicycle hub spindle structure according to claim 3 or 4, wherein an adhesive is further disposed between the first threaded portion and the second threaded portion to make the first threaded portion and the second threaded portion tightly coupled to each other after being screwed together so as to prevent the first threaded portion and the second threaded portion from being easily loosened.

Technical Field

The present invention relates to a spindle structure, and more particularly to a spindle structure for a bicycle hub.

Background

Generally, a bicycle hub spindle is integrally inserted into a bicycle hub seat, and at least two toothed discs are provided on an outer periphery of the bicycle hub seat, and the bicycle hub spindle of the prior art is made of a lightweight material to keep the advantage of lightweight, and therefore, to meet the requirements of bicycle riders, the bicycle can be shifted more and more widely, and the number of stages of shifting is increased, so that the number of the toothed discs installed on the outer periphery of the bicycle hub seat is increased, and a greater load is applied to the bicycle hub spindle.

Disclosure of Invention

The invention provides a bicycle hub spindle structure, and mainly aims to improve the strength of the bicycle hub spindle structure so as to improve the bearing capacity of a gear plate seat.

To achieve the above object, the present invention provides a bicycle hub spindle structure, comprising:

the first shaft section is made of a first material and is provided for penetrating through a fluted disc seat, the first shaft section is a hollow cylinder and is provided with a first end and a second end which are opposite, and the first shaft section is provided with a first through hole penetrating through the first end and the second end;

the second shaft section is made of a second material, the strength of the first material is higher than that of the second material, the second shaft section is a hollow cylinder and is provided with a third end and a fourth end which are opposite to each other, the second shaft section is provided with a second through hole which penetrates through the third end and the fourth end, and the second end of the first shaft section is combined with the third end of the second shaft section to enable the first through hole and the second through hole to be communicated.

In view of the above, the present invention provides a bicycle hub spindle that is formed by combining a first shaft segment and a second shaft segment, rather than integrally forming the first shaft segment and the second shaft segment, and the first shaft segment has a higher strength than the second shaft segment, so that the first shaft segment penetrating through the sprocket seat has a higher structural strength, thereby achieving the purpose of improving the structural strength of the bicycle hub spindle and improving the bearing capacity of the sprocket seat.

Drawings

FIG. 1 is a perspective view of a bicycle hub spindle according to the present invention.

FIG. 2 is an exploded view of the spindle structure of the bicycle hub of the present invention.

FIG. 3 is a cross-sectional view of the bicycle hub spindle construction of the present invention.

FIG. 4 is an exploded view of another embodiment of the spindle structure of the bicycle hub in accordance with the present invention.

Reference numerals indicate the same.

First shaft section 10

First end 11

Second end 12

First through hole 13

First threaded portion 14

Outer surface 10A

Second shaft section 20

Third end 21

Fourth end 22

Second through hole 23

Second threaded portion 24

Inner face 20A

And a fluted disc seat A.

Detailed Description

The present invention provides a bicycle hub spindle structure for being inserted into a gear seat, and the bicycle hub spindle structure, as shown in fig. 1 to 3, comprises:

a first shaft section 10 made of a first material, the first shaft section 10 being provided to penetrate through the fluted disc base a, the first shaft section 10 being a hollow cylinder, the first shaft section 10 having a first end 11 and a second end 12 opposite to each other, the first shaft section 10 having a first through hole 13 penetrating through the first end 11 and the second end 12;

a second shaft section 20 made of a second material, the strength of the first material being higher than that of the second material, so that the second shaft section 20 is lighter than the first shaft section 10, the second shaft section 20 is a hollow cylinder, the second shaft section 20 has a third end 21 and a fourth end 22 opposite to each other, the second shaft section 20 has a second through hole 23 penetrating through the third end 21 and the fourth end 22, the second end 12 of the first shaft section 10 is combined with the third end 21 of the second shaft section 20, so that the first through hole 13 and the second through hole 23 are communicated, and the bicycle hub spindle structure is formed in a non-integral manner.

In this embodiment, the first material may be an iron alloy, and the second material may be an aluminum alloy, a titanium alloy, or the like.

In the present embodiment, as shown in fig. 2, the first shaft section 10 has an outer surface 10A, the outer surface 10A is a surface facing away from the first through hole 13, the outer surface 10A of the first shaft section 10 at the second end 12 has a first threaded portion 14, the second shaft section 20 has an inner surface 20A, the inner surface 20A faces the second through hole 23, the inner surface 20A of the second shaft section 20 at the third end 21 has a second threaded portion 24, the second end 12 of the first shaft section 10 is inserted into the third end 21 of the second shaft section 20, and the first threaded portion 14 and the second threaded portion 24 are engaged with each other, so that the first shaft section 10 and the second shaft section 20 are combined.

In another embodiment, as shown in fig. 4, the first threaded portion 14 is located on a surface of the first shaft section 10 facing the first through hole 13, the first threaded portion 14 is located on the second end 12, the second threaded portion 24 is located on a surface facing away from the second through hole 23, the second threaded portion 24 is located at the third end 21, the third end 21 of the second shaft section 20 is inserted into the second end 12 of the first shaft section 10, and the first threaded portion 14 and the second threaded portion 24 are engaged with each other to combine the first shaft section 10 and the second shaft section 20.

In a preferred embodiment, an adhesive is further disposed between the first threaded portion 14 and the second threaded portion 24, so that the first threaded portion 14 and the second threaded portion 24 are tightly coupled after being engaged and are not easily loosened.

As can be seen from the above description, the bicycle hub spindle of the present invention is formed by combining the first shaft segment 10 and the second shaft segment 20, rather than integrally forming the whole spindle, and the strength of the first shaft segment 10 is higher than that of the second shaft segment 20, so that the first shaft segment 10 penetrating through the chainring seat a has higher structural strength, thereby achieving the purpose of improving the structural strength of the bicycle hub spindle and improving the bearing capacity of the chainring seat a.

Furthermore, in the preferred embodiment, the first shaft section 10 and the second shaft section 20 are combined in a threaded engagement manner, so that the centers of the first shaft section 10 and the second shaft section 20 are not deviated, and the bicycle hub spindle structure can maintain the precision and is not easy to shake.

In addition, the outer surface of the bicycle hub spindle has a concave-convex shape, so that the bicycle hub spindle of the present invention is assembled by the first shaft segment 10 and the second shaft segment 20, and is easier to process than a spindle formed in an integral manner, thereby reducing the processing cost.