Low-carbon alloy road bicycle frame

Abstract

The utility model provides a kind of low-carbon alloy highway bicycle frame, including frame longitudinal link, the left end upper portion of frame longitudinal link is fixedly installed with frame crossbar, the left end of frame crossbar is fixedly installed with frame head pipe, the right end lower portion of frame head pipe is fixedly installed with frame front inclined pipe, the right end of frame longitudinal link lower end and frame front inclined pipe is fixedly installed with connecting seat, the support device is fixedly installed between the frame crossbar and frame front inclined pipe, the right end front portion of frame longitudinal link and connecting seat is fixedly installed with no.1 frame rear inclined pipe, the right end rear portion of frame longitudinal link and connecting seat is fixedly installed with no.2 frame rear inclined pipe.The utility model is through the design of no.1 reinforcing rib and no.2 reinforcing rib I-shaped, can effectively bear shear force, while reducing material use, in addition, no.1 frame rear inclined pipe and the support rod thereon form stable triangle structure, to improve the rigidity of frame body.

Description

Technical Field

[0001] This utility model relates to the field of bicycle frame technology, and in particular to a low-carbon alloy road bicycle frame. Background Technology

[0002] A road bike is a type of bicycle specifically designed for paved roads, primarily used for road riding and competitive racing. It features numerous characteristics: narrower tires for lower rolling resistance; disc brakes or V-brakes, with disc brakes offering better grip and stability, suitable for high-speed riding; a drive system consisting of gears and a chain, commonly configured with double chainrings, triple chainrings, or double cassettes to meet diverse riding needs; a narrower seat to reduce wind resistance; a simple and ergonomic handlebar design for a comfortable riding experience; and a low, forward-leaning riding posture that further reduces wind resistance and increases speed, making it suitable for various scenarios such as road riding, mountain biking, and speed racing.

[0003] An existing patent (application number 202420425897.1) discloses a carbon fiber bicycle frame, including: a carbon fiber frame with a longitudinal connecting rod; a pedal sleeve fixedly connected to one lower end of the longitudinal connecting rod; a crossbar fixedly connected to one upper side of the longitudinal connecting rod; a front slant bar fixedly connected to one side of the pedal sleeve; a connecting anti-compression component sleeved on the outside of the pedal sleeve; a rear slant bar fixedly connected to the other upper side of the longitudinal connecting rod; a rear fork fixedly connected to the other side of the pedal sleeve; a head tube fixedly connected to one end of the crossbar; a rear wheel mount fixedly connected to one end of the rear slant bar; and an inner anti-compression disc inside the crossbar, with a limit screw threaded through the inner anti-compression disc. This technical solution solves the problem of poor anti-compression performance of existing carbon fiber bicycle frames during use, which may lead to frame damage or breakage.

[0004] In conclusion, some existing bicycle frames lack a good supporting and stable structure, especially for bicycle frames made of carbon fiber. During riding, the frame is prone to damage or breakage due to stress, which affects the lifespan of the frame. Utility Model Content

[0005] Therefore, it is necessary to address the technical problem that bicycle frames, especially those made of carbon fiber, lack a good supporting and stable structure, making them prone to damage or breakage during riding and affecting their lifespan. The aim is to provide a low-carbon alloy road bicycle frame.

[0006] A low-carbon alloy road bicycle frame includes a frame longitudinal link. A frame crossbar is fixedly installed on the upper left end of the frame longitudinal link. A head tube is fixedly installed on the left end of the frame crossbar. A front slant tube is fixedly installed on the lower right end of the head tube. A connecting seat is fixedly installed on the lower end of the frame longitudinal link and the right end of the front slant tube. A support device is fixedly installed between the frame crossbar and the front slant tube. A first rear slant tube is fixedly installed on the front right end of the frame longitudinal link and the connecting seat. A second rear slant tube is fixedly installed on the rear right end of the frame longitudinal link and the connecting seat. The support device includes a first mounting seat and a second mounting seat. A first reinforcing rib is fixedly installed on the left side of one corresponding end of the first and second mounting seats. A second reinforcing rib is fixedly installed on the right side of one corresponding end of the first and second mounting seats.

[0007] In one embodiment, a support column is fixedly installed at the middle of one end of the first mounting base and the second mounting base, a fixing frame is fixedly installed at the middle of the outer surface of the support column, and an installation mechanism is fixedly installed at the right end of the fixing frame.

[0008] The design of the No. 1 and No. 2 reinforcing ribs in an I-shape is a structural design widely used in construction, bridges, machinery, and bicycle frames. Its core feature is that the cross-section is "I" shaped, mainly composed of upper and lower flanges and a middle web. The upper and lower flanges of the I-shaped cross-section are far from the neutral axis, which can more effectively resist bending moment and improve bending strength. The middle web is thin but has a large vertical height, which can effectively withstand shear force and reduce material usage. In addition, support columns are installed at the middle of one end of the No. 1 and No. 2 mounting bases to further support the frame.

[0009] In one embodiment, screw holes are provided at the upper and lower front ends of the support column, two mounting screws are installed at the front end of the fixing bracket, and several fixing slots are provided at the right end of the fixing bracket. The fixing bracket is fixed to the middle of the outer surface of the support column by mounting screws.

[0010] Loosening the mounting screws makes it easier to disassemble the bracket, as well as the mounting bracket and base on it.

[0011] In one embodiment, the mounting mechanism includes a base and a mounting bracket, with a plurality of anti-slip protrusions fixedly installed on the inner wall of the mounting bracket, and the base and the mounting bracket being fixedly installed on the right end of the mounting bracket via a fixing groove.

[0012] The mounting bracket and base are provided on the fixed frame, which can be used to place the water cup. The anti-slip protrusions on the mounting bracket can further clamp the water cup and prevent it from slipping out easily.

[0013] In one embodiment, a rear wheel mounting bracket is fixedly installed at the right end of both the first frame rear slant tube and the second frame rear slant tube. Three first support rods are fixedly installed between the upper and lower inner walls of the first frame rear slant tube, and three second support rods are fixedly installed between the upper and lower inner walls of the second frame rear slant tube.

[0014] The first support rod forms a triangle inside the rear diagonal tube of the first frame. The triangular structure is one of the most stable and efficient geometric shapes in engineering and construction. Its core advantage comes from its natural mechanical stability. When under stress, the triangle can transfer the external load along the edge through axial force, avoiding local stress concentration. Similarly, the three second support rods on the rear diagonal tube of the second frame also work in this way, thereby improving the rigidity of the frame body.

[0015] In one embodiment, both the first reinforcing rib and the second reinforcing rib are I-shaped.

[0016] In one embodiment, a plurality of the anti-slip protrusions are arranged in a ring array on the inner wall of the mounting bracket.

[0017] In one embodiment, the mounting screws are the same size as the screw holes and are positioned in a corresponding manner.

[0018] In one embodiment, the mounting bracket is ring-shaped, and the mounting bracket is vertically aligned with the base.

[0019] In one embodiment, the first support rod and the second support rod are inclined at a slope.

[0020] The aforementioned low-carbon alloy road bicycle frame is fixed between the frame crossbar and the front slant tube via No. 1 and No. 2 reinforcing ribs on the support device. The I-shaped design of the No. 1 and No. 2 reinforcing ribs is a structural design widely used in construction, bridges, machinery, and bicycle frames. Its core feature is its I-shaped cross-section, mainly composed of upper and lower flanges and a central web. The upper and lower flanges of the I-shaped cross-section are far from the neutral axis, effectively resisting bending moments and improving bending strength. The central web is thinner but has a large vertical height, effectively withstanding shear forces while reducing material usage. Furthermore, three No. 1 support rods are installed on the rear slant tube of the frame, forming a triangle within the rear slant tube. The triangular structure is one of the most stable and efficient geometric shapes in engineering and construction, its core advantage stemming from its natural mechanical stability. Under stress, the triangle can transfer external loads along its edges through axial force, avoiding localized stress. Similarly, the three support rods on the rear slant tube of the second frame are also designed to improve the rigidity of the frame itself. In addition, the entire frame is made of low-carbon alloy. Low-carbon alloy steel has better toughness than aluminum alloy and carbon fiber, can withstand greater impact, and is suitable for complex road conditions, such as mountain biking. Moreover, it is less prone to cracking due to repeated stress over long-term use, thus extending the frame's lifespan. At the same time, low-carbon steel has excellent processing performance, making it suitable for complex frame structure designs. Local damage can be repaired by simple welding, while carbon fiber frames require complete replacement. Furthermore, compared to aluminum alloy, low-carbon alloy steel has a lower modulus of elasticity, which can absorb road vibrations and provide a more comfortable riding experience. In addition, support columns are installed in the middle of the corresponding ends of the first and second mounting brackets, further supporting the frame. The mounting brackets on these columns are equipped with mounting racks and bases, allowing for the placement of water bottles. The anti-slip protrusions on the mounting racks further secure the water bottles, preventing them from slipping out easily. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a low-carbon alloy road bicycle frame according to the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of a support device for a low-carbon alloy road bicycle frame according to the present invention.

[0023] Figure 3 This is a schematic diagram of the overall structure of the support column and fixing frame of a low-carbon alloy road bicycle frame according to this utility model.

[0024] Figure 4 This is a schematic diagram of the overall structure of the mounting mechanism for a low-carbon alloy road bicycle frame according to the present invention.

[0025] Figure 5This is a schematic diagram of the overall structure of the No. 1 and No. 2 rear slant tubes of a low-carbon alloy road bicycle frame according to this utility model. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Please refer to the following: Figures 1 to 5 This utility model provides a low-carbon alloy road bicycle frame, including a frame longitudinal link 1, a frame crossbar 3 fixedly installed on the upper left end of the frame longitudinal link 1, a frame head tube 4 fixedly installed on the left end of the frame crossbar 3, a frame front slant tube 5 fixedly installed on the lower right end of the frame head tube 4, a connecting seat 6 fixedly installed on the lower end of the frame longitudinal link 1 and the right end of the frame front slant tube 5, and a support device 2 fixedly installed between the frame crossbar 3 and the frame front slant tube 5. The first frame rear inclined tube 7 is fixedly installed together with the front right end of the connecting seat 6 and the frame longitudinal connecting rod 1. The second frame rear inclined tube 8 is fixedly installed together with the rear right end of the connecting seat 6. The support device 2 includes a first mounting seat 20 and a second mounting seat 21. The first reinforcing rib 22 is fixedly installed together on the left side of one end of the first mounting seat 20 and the second mounting seat 21. The second reinforcing rib 23 is fixedly installed together on the right side of one end of the first mounting seat 20 and the second mounting seat 21.

[0032] A support column 24 is fixedly installed at the middle of one end of the first mounting base 20 and the second mounting base 21. A fixing frame 25 is fixedly installed at the middle of the outer surface of the support column 24. An installation mechanism 26 is fixedly installed at the right end of the fixing frame 25. The first reinforcing rib 22 and the second reinforcing rib 23 are both I-shaped.

[0033] The I-shaped design of No. 1 stiffener 22 and No. 2 stiffener 23 is a structural design widely used in construction, bridges, machinery and bicycle frames. Its core feature is that the cross-section is I-shaped, mainly composed of upper and lower flanges and a middle web. The upper and lower flanges of the I-shaped cross-section are far from the neutral axis, which can more effectively resist bending moment and improve bending strength. The middle web is thin but has a large vertical height, which can effectively withstand shear force and reduce material usage. In addition, support columns 24 are installed at the middle of one end of No. 1 mounting base 20 and No. 2 mounting base 21 to further support the frame.

[0034] The support column 24 has screw holes 241 at the upper and lower front ends. The mounting bracket 25 has two mounting screws 251 at its front end. The mounting bracket 25 has several mounting slots 252 at its right end. The mounting bracket 25 is fixed to the middle of the outer surface of the support column 24 by the mounting screws 251. The mounting screws 251 and the screw holes 241 are the same size and their positions are corresponding.

[0035] Loosening the mounting screws 251 facilitates the disassembly of the mounting bracket 25, the mounting bracket 262 thereon, and the base 261.

[0036] The mounting mechanism 26 includes a base 261 and a mounting bracket 262. Several anti-slip protrusions 263 are fixedly installed on the inner wall of the mounting bracket 262. The base 261 and the mounting bracket 262 are fixedly installed on the right end of the fixing bracket 25 through the fixing groove 252. The mounting bracket 262 is ring-shaped and the mounting bracket 262 and the base 261 are vertically corresponding. Several anti-slip protrusions 263 are distributed in a ring array on the inner wall of the mounting bracket 262.

[0037] The mounting bracket 262 and base 261 are provided on the fixing bracket 25, so that the water cup can be placed. The anti-slip protrusions 263 on the mounting bracket 262 can further clamp the water cup to prevent it from slipping out easily.

[0038] Rear wheel mounting brackets 30 are fixedly installed on the right end of the rear diagonal tube 7 of frame 1 and the rear diagonal tube 8 of frame 2. Three support rods 31 are fixedly installed between the upper and lower inner walls of the rear diagonal tube 7 of frame 1 and three support rods 32 are fixedly installed between the upper and lower inner walls of the rear diagonal tube 8 of frame 2. The support rods 31 and 32 are inclined at a slope.

[0039] The first support rod 31 forms a triangle inside the rear diagonal tube 7 of the first frame. The triangular structure is one of the most stable and efficient geometric shapes in engineering and construction. Its core advantage comes from its natural mechanical stability. When under stress, the triangle can transfer the external load along the edge through axial force, avoiding local stress concentration. Similarly, the three second support rods 32 on the rear diagonal tube 8 of the second frame also work in this way, thereby improving the rigidity of the frame body.

[0040] This invention provides a low-carbon alloy road bicycle frame. It is fixed between the frame crossbar 3 and the front slant tube 5 via a first reinforcing rib 22 and a second reinforcing rib 23 on a support device 2. The I-shaped design of the first and second reinforcing ribs 22 and 23 is a structural design widely used in construction, bridges, machinery, and bicycle frames. Its core feature is its I-shaped cross-section, mainly composed of upper and lower flanges and a central web. The upper and lower flanges of the I-shaped cross-section are far from the neutral axis, effectively resisting bending moments and improving bending strength. The central web is thin but has a large vertical height, effectively withstanding shear forces while reducing material usage. Furthermore, three first support rods 31 are installed on the rear slant tube 7 of the first frame. These first support rods 31 form a triangle within the rear slant tube 7. The triangular structure is one of the most stable and efficient geometric shapes in engineering and construction, its core advantage stemming from its natural mechanical stability. Under stress, the triangle can transfer external loads along its edges through axial force, avoiding localized stress. Similarly, the three support rods 32 on the rear diagonal tube 8 of the second frame are also concentrated, thereby improving the rigidity of the frame body. In addition, the frame is made of low-carbon alloy. Low-carbon alloy steel has better toughness than aluminum alloy and carbon fiber, can withstand greater impact, is suitable for complex road conditions, such as mountain biking, and is less prone to cracking due to repeated stress over long-term use, thus extending the frame's lifespan. At the same time, low-carbon steel has excellent processing performance, is suitable for complex frame structure design, and local damage can be repaired by simple welding, while carbon fiber frames require complete replacement. In addition, compared to aluminum alloy, low-carbon alloy steel has a lower elastic modulus, which can absorb road vibrations and provide a more comfortable riding experience. Furthermore, support columns 24 are installed at the middle of one end of the first mounting bracket 20 and the second mounting bracket 21, which further support the frame. The mounting bracket 25 on it is equipped with a mounting bracket 262 and a base 261, which can be used to place a water bottle. The anti-slip protrusions 263 on the mounting bracket 262 can also further clamp the water bottle to prevent it from slipping out easily.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A low-carbon alloy road bicycle frame, comprising a frame longitudinal link, characterized in that: A frame crossbar is fixedly installed on the upper left end of the frame longitudinal link. A frame head tube is fixedly installed on the left end of the frame crossbar. A frame front slant tube is fixedly installed on the lower right end of the frame head tube. A connecting seat is fixedly installed on the lower end of the frame longitudinal link and the right end of the frame front slant tube. A support device is fixedly installed between the frame crossbar and the frame front slant tube. A first frame rear slant tube is fixedly installed on the front right end of the frame longitudinal link and the connecting seat. A second frame rear slant tube is fixedly installed on the rear right end of the frame longitudinal link and the connecting seat. The support device includes a first mounting seat and a second mounting seat. A first reinforcing rib is fixedly installed on the left side of one corresponding end of the first and second mounting seats. A second reinforcing rib is fixedly installed on the right side of one corresponding end of the first and second mounting seats.

2. The low-carbon alloy road bicycle frame according to claim 1, characterized in that, A support column is fixedly installed at the middle of one end of the first mounting base and the second mounting base. A fixing frame is fixedly installed at the middle of the outer surface of the support column, and an installation mechanism is fixedly installed at the right end of the fixing frame.

3. The low-carbon alloy road bicycle frame according to claim 2, characterized in that, The support column has screw holes at the upper and lower front ends. The fixing bracket has two mounting screws at the front end and several fixing slots at the right end. The fixing bracket is fixed to the middle of the outer surface of the support column by mounting screws.

4. The low-carbon alloy road bicycle frame according to claim 3, characterized in that, The installation mechanism includes a base and a mounting frame. Several anti-slip protrusions are fixedly installed on the inner wall of the mounting frame. The base and the mounting frame are fixedly installed on the right end of the mounting frame through a fixing groove.

5. A low-carbon alloy road bicycle frame according to claim 1, characterized in that, Rear wheel mounting brackets are fixedly installed at the right ends of the rear slant tubes of both frame one and frame two. Three support rods are fixedly installed between the upper and lower inner walls of the rear slant tube of frame one, and three support rods are fixedly installed between the upper and lower inner walls of the rear slant tube of frame two.

6. A low-carbon alloy road bicycle frame according to claim 2, characterized in that, Both the No. 1 and No. 2 reinforcing ribs are in the shape of an I-beam.

7. A low-carbon alloy road bicycle frame according to claim 4, characterized in that, Several of the aforementioned anti-slip protrusions are arranged in a ring array on the inner wall of the mounting bracket.

8. A low-carbon alloy road bicycle frame according to claim 4, characterized in that, The mounting screws are the same size as the screw holes and their positions correspond front to back.

9. A low-carbon alloy road bicycle frame according to claim 4, characterized in that, The mounting bracket is ring-shaped, and the mounting bracket and the base are vertically aligned.

10. A low-carbon alloy road bicycle frame according to claim 5, characterized in that, The No. 1 and No. 2 support rods are inclined on a slope.

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