阅读说明：本技术 自行车的五通碗组 (Five-way bowl group of bicycle ) 是由 林鼎钧 于 2018-05-29 设计创作，主要内容包括：本发明关于一种自行车的五通碗组,其包括一轴管及至少一轴承座。该轴管供穿设于一五通管,该轴管包含有至少一第一螺纹段；该至少一轴承座组设于该轴管,各该轴承座包含有与该第一螺纹段相互对应结合的一第二螺纹段；其中,该第一螺纹段包含有复数螺牙,任相邻二螺牙的一牙面所夹设的夹角定义为一螺纹角,该螺纹角小于40度。(The invention relates to a five-way bowl set of a bicycle, which comprises an axle tube and at least one bearing seat. The shaft tube is arranged through a five-way tube and comprises at least one first thread section; the bearing seats are assembled on the shaft tube, and each bearing seat comprises a second threaded section which is correspondingly combined with the first threaded section; the first thread section comprises a plurality of threads, an included angle formed by tooth surfaces of any two adjacent threads is defined as a thread angle, and the thread angle is smaller than 40 degrees.)

1. A bottom bracket set of a bicycle, comprising:

The shaft tube is arranged through a five-way tube and comprises at least one first thread section;

At least one bearing seat assembled on the shaft tube, each bearing seat comprising a second thread section correspondingly combined with the first thread section;

The first thread section comprises a plurality of threads, an included angle formed by tooth surfaces of any two adjacent threads is defined as a thread angle, and the thread angle is smaller than 40 degrees.

2. The bottom bracket set of claim 1, wherein the thread angle is between 10 and 30 degrees.

3. The bottom bracket set as claimed in claim 1, wherein at least one of the axle tube and the at least one bearing seat is made of plastic.

4. The bottom bracket set for a bicycle according to claim 1, wherein the length of the first threaded section in the extending direction of the axle tube is greater than 10 mm.

5. The bottom bracket set for a bicycle of claim 1, wherein the first thread segment has a thread pitch greater than 1.2 mm.

6. the bottom bracket set according to claim 1, wherein the axle tube further comprises a main body disposed in the bottom bracket, the main body comprising a first diameter section and a second diameter section, the second diameter section being larger than the first diameter section, the first thread section being disposed on the first diameter section.

7. the bottom bracket set of claim 1, wherein the axle tube further comprises a main body disposed within the bottom bracket, the main body having a minimum tube thickness greater than 1.5 mm.

8. The bottom bracket set of claim 1, wherein the axle tube further comprises at least a third threaded section, the third threaded section and the first threaded section being respectively disposed on the inner and outer walls of the same section of the axle tube, the bearing seats further comprise a fourth threaded section correspondingly combined with the first threaded section, the second threaded section and the fourth threaded section being respectively disposed on the inner and outer walls of the same section of the bearing seats; when the bearing seat is assembled on the shaft tube, the first thread section and the second thread section are in threaded connection with each other, and the third thread section and the fourth thread section are in threaded connection with each other.

9. The bottom bracket set as claimed in any one of claims 1 to 8, wherein the axle tube further comprises at least one stop portion for stopping the bearing seat when the bearing seat is located at a predetermined position of the axle tube in the extending direction of the axle tube.

10. The bottom bracket set of claim 6, wherein the thread angle is between 10 degrees and 30 degrees; at least one of the shaft tube and the at least one bearing seat is made of plastic material; the length of the first thread section in the extending direction of the shaft tube is more than 10 mm; the thread pitch of the first thread section is more than 1.2 mm; the shaft tube further comprises a main body positioned in the five-way tube, and the minimum tube thickness of the main body is more than 1.5 mm; the shaft tube further comprises at least one stopping part, and when the bearing seat is positioned at a preset position of the shaft tube, the stopping part stops the bearing seat in the extending direction of the shaft tube; the cross section of each screw tooth is trapezoidal, and the length of the crest of each screw tooth is 0.6 mm; the number of the at least one bearing seat and the number of the at least one first thread section are respectively one; the length of the second thread section is greater than that of the first thread section; the axle tube further comprises a bearing part, the first thread section and the bearing part are arranged at two opposite ends of the main body, and the first thread section extends from one end face of the main body to the bearing part; the blocking part and the first thread section are arranged at intervals; the bearing part is connected with the main body in an inclined shape; the bearing part and the bearing seat are used for laterally clamping the five-way pipe; the stopping part is formed at the stepped connection part of the first diameter section and the second diameter section; the highest height of the screw teeth of the first thread section is relatively higher than the outer surface of the second diameter section; the first thread section is an external thread section, and the second thread section is an internal thread section; the screw pitch of the first thread section is 1.8mm, the pipe thickness of the first diameter section is 1.9mm, and the pipe thickness of the second diameter section is 2.2 mm; the ratio of the thread pitch of the first thread section to the crest of the thread is between 2 and 4.

Technical Field

The present invention relates to a bottom bracket set of a bicycle, and more particularly, to a bottom bracket set of a bicycle.

Background

When the bicycle is ridden, the cooperation of the various elements, the bottom forks (also called "bottom forks", b.b.) is important, which is the largest source of support when pedaling. The five-way bowl group with stable structure can improve the trampling smoothness and effectively transfer the trampling force. Therefore, the goal of improving the stability of the bottom bracket set and the bottom bracket set, reducing abnormal sounds, and preventing rusting by effective water resistance is one of the main research and development centers of the bicycle manufacturers, so that the bottom bracket set can be more durable and have better performance.

The structure of the five-way bowl set can be assembled in various ways, such as press-in type, lock type …, etc. The lock-type five-way bowl set has the advantages of wide applicability, convenience in assembly, quickness in disassembly and replacement and the like, so that the lock-type five-way bowl set is popular among users. In order to further enhance the overall function of the locking type bottom bracket set, it is necessary to provide a novel and advanced bottom bracket set for a bicycle.

Disclosure of Invention

The invention aims to provide a five-way bowl set of a bicycle, which can ensure that a bearing seat and an axle tube have better screwing force so as to ensure that the bearing seat and the axle tube have a more stable connecting structure, thereby improving the overall operation stability and efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

The invention provides a five-way bowl group of a bicycle, comprising: an axle tube and at least one bearing seat. The shaft tube is arranged through a five-way tube and comprises at least one first thread section; the bearing seats are assembled on the shaft tube, and each bearing seat comprises a second threaded section which is correspondingly combined with the first threaded section; the first thread section comprises a plurality of threads, an included angle formed by tooth surfaces of any two adjacent threads is defined as a thread angle, and the thread angle is smaller than 40 degrees.

The thread angle is between 10 and 30 degrees.

At least one of the shaft tube and the bearing seat is made of plastic material.

The length of the first thread section in the extending direction of the shaft tube is more than 10 mm.

The thread pitch of the first thread segments is greater than 1.2 mm.

The shaft tube further comprises a main body which is arranged in the five-way tube, the main body comprises a first diameter section and a second diameter section, the second diameter section is larger than the first diameter section, and the first thread section is arranged on the first diameter section.

The shaft tube further comprises a main body which is arranged in the five-way tube, and the minimum tube thickness of the main body is more than 1.5 mm.

The shaft tube further comprises at least one third thread section, the third thread section and the first thread section are correspondingly arranged on the inner wall and the outer wall of the same section of the shaft tube, each bearing seat further comprises a fourth thread section correspondingly combined with the first thread section, and the second thread section and the fourth thread section are correspondingly arranged on the inner wall and the outer wall of the same section of the bearing seat; when the bearing seat is assembled on the shaft tube, the first thread section and the second thread section are in threaded connection with each other, and the third thread section and the fourth thread section are in threaded connection with each other.

The shaft tube further comprises at least one stopping part, and when the bearing seat is positioned at a preset position of the shaft tube, the stopping part stops the bearing seat in the extending direction of the shaft tube.

The thread angle is between 10 degrees and 30 degrees; at least one of the shaft tube and the at least one bearing seat is made of plastic material; the length of the first thread section in the extending direction of the shaft tube is more than 10 mm; the thread pitch of the first thread section is more than 1.2 mm; the shaft tube further comprises a main body positioned in the five-way tube, and the minimum tube thickness of the main body is more than 1.5 mm; the shaft tube further comprises at least one stopping part, and when the bearing seat is positioned at a preset position of the shaft tube, the stopping part stops the bearing seat in the extending direction of the shaft tube; the cross section of each screw tooth is trapezoidal, and the length of the crest of each screw tooth is 0.6 mm; the number of the at least one bearing seat and the number of the at least one first thread section are respectively one; the length of the second thread section is greater than that of the first thread section; the axle tube further comprises a bearing part, the first thread section and the bearing part are arranged at two opposite ends of the main body, and the first thread section extends from one end face of the main body to the bearing part; the blocking part and the first thread section are arranged at intervals; the bearing part is connected with the main body in an inclined shape; the bearing part and the bearing seat are used for laterally clamping the five-way pipe; the stopping part is formed at the stepped connection part of the first diameter section and the second diameter section; the highest height of the screw teeth of the first thread section is relatively higher than the outer surface of the second diameter section; the first thread section is an external thread section, and the second thread section is an internal thread section; the screw pitch of the first thread section is 1.8mm, the pipe thickness of the first diameter section is 1.9mm, and the pipe thickness of the second diameter section is 2.2 mm; the ratio of the thread pitch of the first thread section to the crest of the thread is between 2 and 4.

The invention has the beneficial effects that: the screw thread made of plastic is approximately trapezoidal by improving the thread angle of the five-way bowl group of the bicycle, so that the excellent structural strength is kept, and the screw thread has better service life. And, at the same time, the thread pitch is limited to be at least larger than 1.2mm, so that the thread can have enough space for size planning, and can have a thicker section to resist the action of external force and is not easy to break.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a cross-sectional view of fig. 1.

Fig. 4 is a cross-sectional view of fig. 2.

Fig. 5 is a partially enlarged view of fig. 4.

FIG. 6 is a cross-sectional view of another embodiment of the present invention.

Fig. 7 is an exploded cross-sectional view of another embodiment of the present invention.

Reference numerals: 1, 1A: an axle tube; 2: a main body; 21: a first diameter section; 22: a second diameter section; 23: an end face; 3: a bearing portion; 4: a stopper portion; 5, 5A: a bearing seat; 6: a first thread segment; 61: screw teeth; 62: a tooth surface; 63: a crest; 64: a thread angle; 7: a second thread segment; 8: a third thread segment; 9: a fourth thread segment.

Detailed Description

The following description is given by way of example only, and is not intended to limit the scope of the invention.

Referring to fig. 1 to 5, which illustrate a preferred embodiment of the present invention, the bottom bracket set of the bicycle of the present invention includes an axle tube 1 and at least one bearing seat 5.

The shaft tube 1 is arranged through a five-way tube, and the shaft tube 1 comprises at least one first thread section 6; the at least one bearing seat 5 is assembled on the shaft tube 1, and each bearing seat 5 includes a second threaded section 7 correspondingly combined with the first threaded section 6. The first thread segment 6 includes a plurality of threads 61, and an included angle formed by a thread surface 62 of any two adjacent threads 61 defines a thread angle 64, where the thread angle 64 is smaller than 40 degrees.

As can be seen from the above, the form of the five-way socket set belongs to a pair lock type, and the pair lock type can be further subdivided into two-piece type and three-piece type according to the different number of the bearing seats 5, in this embodiment, the number of the at least one bearing seat 5 and the number of the at least one first threaded section 6 are respectively one, that is, the five-way socket set of the two-piece pair lock is taken as an illustration in this embodiment.

It will be appreciated that the second thread segments 7 are of a matching size to the first thread segments 6, and therefore only the structure of the first thread segments 6 will be described.

In the present invention, the thread angle 64 is limited to be less than 40 degrees, so that the cross-sectional profile of the thread 61 is substantially trapezoidal, and compared with the thread of a general thread having an equilateral triangle shape, a crest 63 of the thread 61 having a trapezoidal cross-section has a larger cross-section, and can have a harder structure to effectively resist an acting force and be not easily broken, so when at least one of the shaft tube 1 and the at least one bearing seat 5 is made of a plastic material (in this embodiment, the shaft tube 1 and each bearing seat 5 are both made of a plastic material), the thread 61 made of the plastic material can have a longer service life and be not easily broken through the structural design, and light weight and durability can be considered at the same time. The thread angle 64 is preferably between 10 degrees and 30 degrees, as measured by practical use, while maintaining good rotational smoothness and structural strength, such as but not limited to 24 ± 1 degrees for the thread angle 64 in this embodiment.

Moreover, the screw threads 61 with the trapezoidal cross section can ensure that when the first thread section 6 and the second thread section 7 are screwed with each other, the tooth surfaces 62 of the two opposite screw threads 61 are tightly attached by the conical surfaces, which has the advantages of difficult loosening and strong combination degree, so that the bearing seat 5 can be stably connected with the shaft tube 1.

In addition, the thread pitch of the first thread segments 6 is preferably greater than 1.2mm, so that each thread 61 can have a larger space for specification and dimension to have a proper structural strength for matching with different use targets. Preferably, the ratio of the pitch of the first thread segments 6 to the crest 63 of the thread 61 is between 2 and 4, so as to ensure that each thread 61 produced and processed has at least a certain structural strength and can have a relatively clear processing standard for planning and designing. In the embodiment, the shaft tube 1 of the five-way set is used as the target, so the thread pitch of the first thread section 6 is designed to be 1.8mm, the length of the crest 63 of each thread 61 is designed to be 0.6mm, and the service strength is more appropriate.

More specifically, the length of the first thread segments 6 in the extending direction of the shaft tube 1 is preferably greater than 10mm, so as to ensure that the whole first thread segments 6 and the second thread segments 7 have more engaging areas for stable combination. Furthermore, the length of the second thread segment 7 is greater than that of the first thread segment 6, so that the five-way pipe set can be extended or shortened with sufficient margin to match the five-way pipes with different lengths. In this embodiment, the first thread segments 6 are external thread segments and the second thread segments 7 are internal thread segments.

In addition to the above aspects, the shaft tube 1A and the bearing seat 5A shown in fig. 6 and fig. 7 may also be adopted, wherein the shaft tube 1 further includes at least one third thread segment 8, the third thread segment 8 and the first thread segment 6 are correspondingly disposed on the inner and outer walls of the same section of the shaft tube 1A, each bearing seat 5A further includes a fourth thread segment 9 correspondingly combined with the first thread segment 6, and the second thread segment 7 and the fourth thread segment 9 are correspondingly disposed on the inner and outer walls of the same section of the bearing seat 5A; when the bearing seat 5A is assembled on the shaft tube 1A, the first thread section 6 and the second thread section 7 are screwed together, and the third thread section 8 and the fourth thread section 9 are screwed together, so as to greatly improve the bonding strength between the bearing seat 5A and the shaft tube 1A.

referring to the embodiment shown in fig. 1 to 5, the shaft tube 1 preferably further includes at least one stopping portion 4, when the bearing seat 5 is located at a predetermined position of the shaft tube 1, the stopping portion 4 stops the bearing seat 5 in the extending direction of the shaft tube 1, so as to ensure that the shaft tube 1 does not go too far into the bearing seat 5 to push out the bearing.

More specifically, the shaft tube 1 further includes a main body 2 disposed inside the five-way tube, the main body 2 includes a first diameter section 21 and a second diameter section 22, the second diameter section 22 is larger than the first diameter section 21, and the first thread section 6 is disposed on the first diameter section 21. The stop portion 4 is formed at the stepped connection portion of the first diameter section 21 and the second diameter section 22, the maximum height of the thread 61 of the first thread section 6 is relatively higher than the outer surface of the second diameter section 22, and a portion of the second thread section 7 and the stop portion 4 are in an interference relationship in the extending direction of the shaft tube 1.

More specifically, the shaft tube 1 further includes a bearing portion 3, the first thread portion 6 and the bearing portion 3 are disposed at two opposite ends of the main body 2, the first thread portion 6 extends from an end surface 23 of the main body 2 toward the bearing portion 3, wherein the bearing portion 3 and the bearing seat 5 laterally clamp the five-way tube.

Preferably, the minimum tube thickness of the main body 2 is greater than 1.5mm to ensure a stronger structure to bear the applied force, in this embodiment, the tube thickness of the first diameter section 21 is 1.9mm, the tube thickness of the second diameter section 22 is 2.2mm, the stop portion 4 is spaced apart from the first threaded section 6, and the portion of the bearing portion 3 connected to the main body 2 is inclined.

In summary, the screw thread of the bottom bracket set of the bicycle of the present invention is substantially trapezoidal by improving the thread angle, so that the screw thread made of plastic has excellent structural strength, and the screw thread has a longer service life. And, at the same time, the thread pitch is limited to be at least larger than 1.2mm, so that the thread can have enough space for size planning, and can have a thicker section to resist the action of external force and is not easy to break.