CN203581231U - Bicycle frame - Google Patents

Abstract

The utility model discloses a bicycle frame, including the frame main part, frame main part front portion is provided with head pipe and low tube, and the upper portion of frame main part is provided with the top tube, and the middle part of frame main part is well pipe and five-way, and the rear portion of frame main part is the back vent, its characterized in that: the five-way is arranged at the lower part of the middle pipe, an alloy shaft core is movably arranged in the five-way, and the alloy shaft core is movably connected with the rear fork; the upper pipe or the middle pipe is provided with a connecting seat A, the rear fork is provided with a connecting seat B, and the connecting seat A and the connecting seat B are connected through a connecting rod. The utility model discloses make bicycle frame transmission system more nimble, whole molding is succinct more, in addition, the utility model discloses reduce the fulcrum single-point atress of moving away to avoid possible earthquakes, guarantee frame security performance, ride more steadily.

Description

A bicycle frame

technical field

The utility model belongs to the field of bicycles, in particular to a bicycle frame.

Background technique

As we all know, bicycle is an indispensable means of transportation in people's daily life. It is cheap, easy to maintain and easy to use. It is loved by people all over the world and has formed a huge bicycle consumer market. With the rapid development of modern society, bicycles have become more It is only a means of transportation and transportation, and it already has multiple functions such as fitness, tourism, and competition. The level of bicycle grade depends on the choice of materials and workmanship.

Currently, a single-link system on a bicycle frame is the most common type of front and rear suspension system. The linkage of this system is connected to the frame by only one bearing, and the position of its upper bearing determines the ride performance of the bike. Like off-road bikes, the bearings are mostly at the height of the middle chainring; the bearings of free-riding bikes are relatively higher and forward. The advantage is that the structure is simple. Lightweight, cheap and easy to maintain. The disadvantage is that it is easy to shake and is easily disturbed by the transmission system. If the rear forcer with a platform design is not used, the power loss will be greater.

Another type of front and rear shock absorber system is the single-rotation point multi-link structure. The rear shock absorber system of this structure is most likely to be confused with the four-link system, because the two are the same in terms of the number of links, but in terms of function From the looks of it, the function of the rear section of the body is very similar to that of a single-link system. In this configuration, there are no linkages connecting the main bearings of the pedal bearings to the rear axle. Simply put, it is a single-link system supported by multiple links. The advantage of the above-mentioned structure is that it has good rigidity, and there is no problem of uneven load of a single shock absorber, but its disadvantage is that there are many bearings and it is easy to shake.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the above-mentioned defects, and provide a bicycle frame with simple structure, less connecting bearings, simple shape of the frame, and not easy to shake and be disturbed by the transmission system when riding.

In order to solve the above problems, the technical solution adopted in the utility model is:

A bicycle frame, comprising a frame body, a head tube and a down tube are arranged at the front of the frame body, an upper tube is arranged at the upper part of the frame body, a middle tube and a bottom bracket are arranged at the middle part of the frame body, and a The rear part is a rear fork, which is characterized in that: the bottom bracket is installed at the lower part of the middle tube, and an alloy shaft core is movably installed in the bottom bracket, and the alloy shaft core is movably connected to the rear fork; the upper tube or the middle tube is provided with The connecting seat A and the connecting seat B are arranged on the rear fork, and the connecting seat A and the connecting seat B are connected by a connecting rod.

The bottom bracket is connected to the alloy shaft core through two bearings, and the alloy shaft core is connected to the rear fork through two bearings.

The connection seat A and the connection seat B are respectively provided with connection holes, and the two ends of the connection rod are respectively connected to the connection holes by bolts.

The whole of the rear fork, the middle tube and the upper tube is arc-shaped.

Due to the adoption of the above technical solution, compared with the prior art, the utility model takes the center of the bottom bracket as the only turning point, uses the alloy shaft core as the turning point support, and replaces the ordinary center shaft with the combination of four bearings and the alloy shaft core. At the same time, A connecting rod is used to connect the upper tube and the rear fork of the frame or the middle tube and the rear fork, so that the transmission system of the bicycle frame is more flexible, and the overall shape is more concise. In addition, the utility model reduces the single-point force of the shock-absorbing fulcrum , to ensure the safety performance of the frame, and the ride is more stable.

At the same time, the utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

In the figure: 1- rear fork; 2- connecting seat B; 3- connecting seat A; 4- middle pipe; 5- upper pipe; 6- head pipe; 7- down pipe; 8- bottom bracket; 9- connecting hole.

Detailed ways

Example:

As shown in Figure 1, a bicycle frame includes a frame body, a head tube 6 and a down tube 7 are arranged on the front part of the frame body, an upper tube 5 is arranged on the upper part of the frame body, and the middle part of the frame body is a middle Pipe 4 and bottom bracket 8, the rear part of vehicle frame main body is rear fork 1. The bottom bracket 8 is installed on the bottom of the middle tube 4, and the alloy shaft core is movably installed in the bottom bracket 8, and the alloy shaft core is movably connected with the rear fork 1. The upper tube 5 or the middle tube 4 is provided with a connecting seat A3, and the rear fork 1 is provided with a connecting seat B2, and the connecting seat A3 and the connecting seat B2 are connected by a connecting rod.

In this embodiment, the bottom bracket 8 is connected to the alloy shaft core through two bearings, and the alloy shaft core is connected to the rear fork 1 through two bearings.

The connection base A3 and the connection base B2 are respectively provided with connection holes 9 , and the two ends of the connection rod 9 are respectively connected to the connection holes 9 by bolts.

Considering the needs of helping the frame to disperse the force after being stressed, having good cushioning performance, higher frame strength, and more comfortable riding, the rear fork 1, the middle tube 4 and the upper tube 5 are bow-shaped as a whole.

The utility model takes the center of the bottom bracket as the only turning point, uses the alloy shaft core as the turning point support, and replaces the ordinary middle shaft with the combination of four bearings and the alloy shaft core. The rear fork or the middle tube and the rear fork make the transmission system of the bicycle frame more flexible, and the overall shape is more concise. In addition, the utility model reduces the single-point force of the shock-absorbing fulcrum, ensures the safety performance of the bicycle frame, and rides more smoothly.

The utility model is not limited to the preferred embodiment described above, and anyone should know that the structural changes made under the inspiration of the utility model, and all technical solutions that are the same as or similar to the utility model, all belong to the utility model protected range.

Claims (4)

1. a cycle frame, comprise main body of vehicle frame, main body of vehicle frame front portion is provided with head tube and lower pipe, the top of main body of vehicle frame is provided with pipe, the middle part of main body of vehicle frame is middle pipe and five-way, and the rear portion of main body of vehicle frame is back vent, it is characterized in that: described five-way is arranged on the bottom of middle pipe, and in five-way, be movably installed with alloy axle core, alloy axle core is flexibly connected back vent; On described upper pipe or middle pipe, be provided with Connection Block A, on back vent, be provided with Connection Block B, between Connection Block A and Connection Block B, by pipe link, be connected.

2. cycle frame according to claim 1, is characterized in that: between described five-way and alloy axle core, by two bearings, be connected, between alloy axle core and back vent, by two bearings, be connected.

3. cycle frame according to claim 2, is characterized in that: on described Connection Block A and Connection Block B, be respectively arranged with connecting bore, the two ends of pipe link are bolted respectively connecting bore.

4. cycle frame according to claim 3, is characterized in that: the entirety of described back vent, middle pipe and upper pipe is arc.

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