Light-weight pipe drawing frame

Abstract

The utility model discloses a light-weight drawing pipe frame which comprises a vertical pipe, an upper pipe is fixedly connected to the upper portion of the right side of the vertical pipe, a lower pipe is fixedly connected to the lower portion of the right side of the vertical pipe, a head pipe is fixedly connected to the right side of the lower pipe, and the right side of the upper pipe is fixedly connected with the head pipe. A bottom fork is fixedly connected to the lower left portion of the vertical pipe, a fork frame is fixedly connected to the upper left portion of the vertical pipe, a rear fork piece is fixedly connected to the end of one side of the bottom fork, and the rear fork piece is fixedly connected with the fork frame. According to the bicycle frame, the whole bicycle frame is lightened, the pipe wall is thinner than that of a bicycle frame without a drawing pipe by drawing the pipe of the bicycle frame, so that the weight of the whole bicycle frame is reduced, and the steel pipe is in an arch bridge shape with a thin middle part and a thick side; on the premise that the strength of the bicycle frame is not reduced, the weight of the bicycle frame is reduced, the metal property of the bicycle frame is higher, and therefore the overall light weight of the bicycle frame is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycle frames, and in particular relates to a lightweight pipe-drawing frame. Background Art

[0002] As the skeleton of the entire bicycle, the bicycle frame determines and affects the correctness and comfort of the riding posture to the greatest extent. The frame components are the basic structure of the bicycle, and are also the skeleton and body of the bicycle. Other components are also directly or indirectly installed on the frame. The aluminum alloy frames for teenagers on the current market are heavy, and the pipes used are of equal arm thickness. The overall weight is heavy, and the users are young, which is very inconvenient during the transportation process. In addition, the cost of the relatively new carbon fiber materials is relatively high.

[0003] A lightweight bicycle frame with Chinese utility model patent publication number CN220298668U includes a middle shaft sleeve, an upper beam is fixedly connected to the upper right side of the middle shaft sleeve, and a front fork sleeve is fixedly connected to the right end of the upper beam, and an oblique beam is fixedly connected to the lower right side of the middle shaft sleeve, and the front fork sleeve is fixedly connected to the right end of the oblique beam; a rear axle fork frame is fixedly connected to the upper left side of the middle shaft sleeve, and a cross beam is fixedly connected to the lower left side of the middle shaft sleeve, and a mounting hole is provided at the junction of the middle shaft sleeve, the oblique beam and the cross beam; a limiting groove is provided in the left end of the cross beam, and a limiting spring is arranged in the limiting groove, and one end of the limiting spring is connected to a slide rod, and a limited fork is fixedly connected to one side of the slide rod.

[0004] The frame achieves the purpose of reducing the weight of the entire bicycle frame body by adopting a hollow setting. The sliding rod slides in the crossbeam, so that the sliding rod can drive the limit fork to limit the rear wheel, thereby reducing the use of bolts when installing the rear wheel and reducing the weight of the frame after installation. However, the partial hollowing out of the frame is not enough to achieve the overall lightweight of the bicycle frame. Utility Model Content

[0005] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a lightweight tube frame to solve the problem raised by the above background technology that the current existing technology has a partially hollowed-out frame, which is insufficient to achieve the overall lightweight of the bicycle frame.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] A lightweight tube-drawing frame comprises a riser, wherein an upper tube is fixedly connected to the upper right side of the riser, a lower tube is fixedly connected to the lower right side of the riser, a head tube is fixedly connected to the right side of the lower tube, and the right side of the upper tube is fixedly connected to the head tube;

[0008] A flat fork is fixedly connected to the lower left of the riser, a fork frame is fixedly connected to the upper left of the riser, a rear fork piece is fixedly connected to one end of one side of the flat fork, and the rear fork piece is fixedly connected to the fork frame;

[0009] The down tube, flat fork, fork frame, upper tube, head tube, rear fork plate and seat tube are collectively referred to as pipes, and the pipes are processed by one-time pipe drawing during production.

[0010] Further defined, it also includes a limiting frame, one end of which is fixedly connected to the flat fork, and the other end is fixedly connected to the fork frame. Such a structural design can limit and fix the flat fork and the fork frame by setting the limiting frame, thereby enhancing their rigidity.

[0011] Further defined, the pipe material of the pipe drawing frame is chromium-molybdenum steel. Such a structural design, adding two elements of Mo (Mo) and chromium (Cr) to carbon steel is called molybdenum-chromium alloy steel. The role of molybdenum is to increase the strength of steel, prevent tempering, reduce brittleness, make it high in strength and easy to draw pipes. Molybdenum can increase the strength of steel and prevent tempering; chromium can make steel corrosion-resistant, rust-resistant and prevent high-temperature oxidation.

[0012] It is further defined that the pipes on the pipe-drawing frame are all processed by secondary pipe-drawing. With such a structural design, the pipe-drawing is used to make the steel pipe into an arch bridge shape with thin edges and thick sides, with unchanged strength, reduced weight, and stronger metal properties. After secondary pipe-drawing, three kinds of pipe wall thicknesses can be obtained. Manufacturers can obtain frames of different qualities by different pipe-drawing times, thereby producing different types of bicycle frames.

[0013] It is further defined that the pipes on the pipe-drawing frame are all processed by three-time pipe-drawing. With such a structural design, the pipe-drawing is used to make the steel pipe into an arch bridge shape with thin edges and thick sides, with unchanged strength, reduced weight, and stronger metal properties. After three-time pipe-drawing, four kinds of pipe wall thickness can be obtained. Manufacturers can obtain frames of different qualities by different pipe-drawing times, thereby producing different types of bicycle frames.

[0014] Beneficial effects of the utility model:

[0015] Compared with the prior art, the utility model reduces the weight of the entire bicycle frame by subjecting the down tube, flat fork, fork frame, upper tube, head tube, rear fork plate and seat tube to respective tube drawing treatments. This technology makes the tube wall thinner than a frame without tube drawing, thereby reducing the weight of the entire bicycle frame, and making the thin-edge-thick arch bridge shape in the steel tube reduce the weight of the bicycle frame without reducing its strength, and makes its metallic property stronger, thereby achieving the overall lightweight of the bicycle frame; in addition, the manufacturer can subject the frame to one, two or three tube drawing treatments, so that the frame has different tube wall thicknesses without changing its strength. This method is particularly suitable for mountain bikes, which not only makes the frame lightweight, high-strength and good rigidity, but also enables the rider to ride with less effort, and the appearance is also more beautiful and fashionable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a lightweight pipe-drawing frame of the utility model;

[0018] The symbols of the main components are explained as follows: down tube 1, flat fork 2, fork frame 3, upper tube 4, head tube 5, limit frame 6, rear fork plate 7, seat tube 8. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The technical solution in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. It should be understood that the specific embodiments described here are only used to explain the present utility model and are not used to limit the present utility model.

[0022] like Figure 1 As shown, a lightweight tube-drawing frame of the utility model comprises a stand pipe 8, an upper pipe 4 is welded to the upper right side of the stand pipe 8, a lower pipe 1 is welded to the lower right side of the stand pipe 8, a head pipe 5 is welded to the right side of the lower pipe 1, and the right side of the upper pipe 4 is welded to the head pipe 5;

[0023] The lower left side of the riser 8 is connected to the flat fork 2 by welding, the upper left side of the riser 8 is connected to the fork frame 3 by welding, one side end of the flat fork 2 is connected to the rear fork piece 7 by welding, and the rear fork piece 7 is connected to the fork frame 3 by welding;

[0024] The down tube 1, the fork 2, the fork frame 3, the upper tube 4, the head tube 5, the rear fork piece 7 and the seat tube 8 are collectively referred to as pipes, and the pipes are processed by a single pipe drawing process during production.

[0025] Preferably, it further comprises a limiting frame 6, one end of which is connected to the flat fork 2 by welding, and the other end is connected to the fork frame 3 by welding. With such a structural design, the flat fork 2 and the fork frame 3 can be fixed by setting the limiting frame to enhance their rigidity.

[0026] Preferably, the pipes of the pipe drawing frame are made of chromium-molybdenum steel. Such a structural design, adding two elements, Mo and chromium Cr, to carbon steel is called molybdenum-chromium alloy steel. The role of molybdenum is to increase the strength of the steel, prevent tempering, reduce brittleness, make it high in strength and easy to draw pipes. Molybdenum can increase the strength of steel and prevent tempering; chromium can make steel corrosion-resistant, rust-resistant and prevent high-temperature oxidation.

[0027] Preferably, the pipes on the pipe-drawing frame are all processed by secondary pipe-drawing. With such a structural design, the pipe-drawing is used to make the steel pipe into an arch bridge shape with thin edges and thick sides, with unchanged strength, reduced weight, and stronger metal properties. After secondary pipe-drawing, three kinds of pipe wall thicknesses can be obtained. Manufacturers can obtain frames of different qualities by different pipe-drawing times, thereby producing different types of bicycle frames.

[0028] Preferably, the pipes on the pipe-drawing frame are all processed by three pipe-drawing processes. With such a structural design, the pipe-drawing process is used to make the steel pipe into an arch bridge shape with thin edges and thick sides, with unchanged strength, reduced weight, and stronger metal properties. After three pipe-drawing processes, four types of pipe wall thicknesses can be obtained. Manufacturers can obtain frames of different qualities by different pipe-drawing times, thereby producing different types of bicycle frames.

[0029] The working principle of the utility model is:

[0030] During production and processing of this solution, the pipes (down tube 1, flat fork 2, fork frame 3, upper tube 4, head tube 5, rear fork piece 7 and seat tube 8) are fixed on the pipe extraction machine respectively, and then an axis on the pipe extraction machine is passed through the middle of the pipe, and then it is repeatedly polished. When the axis passes through the pipe with a relatively small inner diameter, the inner diameter of the pipe will be pushed and thinned, and at the same time, the length of the pipe will increase due to the pushing. At this time, the pipe wall will become thinner and stronger, while increasing the strength, it also reduces its own weight.

[0031] This technology makes the tube wall of the bicycle frame thinner than that of a frame without tube drawing, thereby reducing the weight of the entire bicycle frame. The thin-edge-thick arch bridge shape in the steel tube reduces the weight of the bicycle frame without reducing its strength, and makes its metallic properties stronger, thereby achieving overall lightweighting of the bicycle frame. In addition, manufacturers can draw the tubes for the frame once, twice or three times, so that the tube wall thickness remains unchanged. This method is particularly suitable for mountain bikes, making the frame lightweight, high-strength and with good rigidity.

[0032] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A lightweight pipe-drawing frame, characterized in that: It comprises a stand pipe (8), wherein an upper pipe (4) is fixedly connected to the upper right side of the stand pipe (8), a lower pipe (1) is fixedly connected to the lower right side of the stand pipe (8), a head pipe (5) is fixedly connected to the right side of the lower pipe (1), and the upper pipe (4) is fixedly connected to the head pipe (5) on the right side; The lower left side of the vertical tube (8) is fixedly connected to a horizontal fork (2), the upper left side of the vertical tube (8) is fixedly connected to a fork frame (3), one side end of the horizontal fork (2) is fixedly connected to a rear fork piece (7), and the rear fork piece (7) is fixedly connected to the fork frame (3); The down tube (1), the fork (2), the fork frame (3), the upper tube (4), the head tube (5), the rear fork plate (7) and the seat tube (8) are collectively referred to as pipes, and the pipes are processed by a single pipe drawing process during production.

2. A lightweight pipe-drawing frame according to claim 1, characterized in that: It also comprises a limiting frame (6), one end of which is fixedly connected to the flat fork (2), and the other end of which is fixedly connected to the fork frame (3).

3. A lightweight pipe-drawing frame according to claim 1, characterized in that: The tubes of the tube frame are made of chromium-molybdenum steel.

4. A lightweight pipe-drawing frame according to claim 3, characterized in that: The pipes on the pipe drawing frame are all processed by secondary pipe drawing.

5. The lightweight pipe-drawing frame according to claim 3, characterized in that: The pipes on the pipe drawing frame are all processed by three pipe drawing processes.

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