Bicycle frame capable of reducing turbulent flow

Abstract

The bicycle frame capable of reducing the turbulent flow comprises a middle pipe, an upper pipe, a rear fork and a flow guide cover, the middle pipe is used for being connected with a seat cushion, the rear end of the upper pipe is connected with the middle pipe, and the rear fork is connected with the middle pipe and used for installing a rear wheel. The flow guide cover is arranged above the rear fork, at least part of the flow guide cover is located behind the middle pipe, and a flow guide hole used for flow guide is formed in the flow guide cover and is formed in the length direction of the bicycle frame. Therefore, when the bicycle is ridden forwards, air flow can be smoothened along the flow guide holes after passing through the middle pipe, and when the air flow passes through the position above the joint of the middle pipe and the rear fork, the air flow cannot generate turbulent flow due to no support, so that the bicycle can be ridden more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle frames, in particular to a bicycle frame capable of reducing turbulence. Background Art

[0002] The bicycle frame includes a middle tube, a front fork for connecting the front wheel, a rear fork for connecting the rear wheel, and an upper tube with two ends connected to the middle tube and the front fork respectively, and one end of the rear fork is connected to the middle tube. When riding a bicycle, airflow is generated. After the airflow passes through the middle tube, due to the gap in the middle of the rear fork and the empty side of the middle tube near the rear wheel, turbulence is generated behind the middle tube and at the position connected to the rear fork when the airflow passes through the middle tube and the rear fork, affecting the riding stability. Utility Model Content

[0003] The main purpose of the utility model is to provide a bicycle frame with reduced turbulence, so as to solve the problem that the existing bicycle frame easily generates turbulence at the connection between the middle tube and the rear fork.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0005] A bicycle rack for reducing turbulence, comprising:

[0006] A center tube for connecting the seat cushion;

[0007] The upper tube connected to the middle tube at the rear end;

[0008] A rear fork connected to the mid-tube and used to mount the rear wheel;

[0009] The air deflector is arranged above the rear fork, and at least part of the air deflector is located behind the middle tube. The air deflector is provided with air diversion holes for diverting air, and the air diversion holes are arranged along the length direction of the bicycle frame.

[0010] Furthermore, the number of the guide holes is two, and the two guide holes are located on both sides of the middle tube.

[0011] Furthermore, the rear fork includes two support rods located on both sides of the rear wheel, the two air guide holes are respectively located above the two support rods, the support rod includes a first connecting rod and a second connecting rod connected to the first connecting rod, the first connecting rod is connected to the rear wheel at an end away from the second connecting rod, the second connecting rod is connected to the middle tube at an end away from the first connecting rod, the angle between the first connecting rod and the second connecting rod is 90°-150°, and the width of the air guide cover is consistent with the width of the rear fork.

[0012] Furthermore, the air deflector can be detachably arranged on the rear fork.

[0013] Furthermore, the air deflector has a limiting opening on the side away from the rear wheel, the limiting opening is located between the two air guide holes, and the middle tube is at least partially placed in the limiting opening; the air deflector has a hook extending downward from the bottom on the side away from the rear wheel, the hook has a bayonet opening on the side close to the rear wheel, the front end of the second connecting rod is placed in the bayonet opening, and the bottom surface of the air deflector has a groove matching the second connecting rod and the first connecting rod.

[0014] Further, the air guide cover includes a first cover body, a connecting portion and a second cover body, the two air guide holes are respectively located on the first cover body and the second cover body, the first cover body and the second cover body both include a plurality of side wall panels, the air guide hole is formed by surrounding the plurality of side wall panels, the two ends of the connecting portion are respectively connected to the side wall panels of the first cover body and the second cover body that are close to each other, the first cover body and the second cover body are symmetrical structures, the limit opening is formed by surrounding the connecting portion, the first cover body and the second cover body. The number of the hooks is two, and they are respectively arranged below the first cover body and the second cover body.

[0015] Furthermore, the multiple side wall panels are respectively a first panel, a second panel, a third panel and a fourth panel, the first panel, the second panel, the third panel and the fourth panel are connected in sequence, the first panel and the third panel are arranged opposite to each other, the second panel and the fourth panel are arranged opposite to each other, the two ends of the connecting part are respectively connected to the first panel where the first cover body and the second cover body are close to each other, part of the fourth panel extends along the top surface of the second connecting rod, and part of the fourth panel extends along the top surface of the first connecting rod, the hook is formed by the fourth panel extending downward, and the limit opening is formed by two first panels and the connecting part; the first panel is at least partially located in front of the fourth panel.

[0016] Furthermore, the width of the middle tube at the end away from the rear wheel gradually increases along the riding direction of the bicycle.

[0017] Furthermore, the depth of the limiting opening is greater than one third of the width of the middle tube, and the depth of the limiting opening is less than two thirds of the width of the middle tube.

[0018] Furthermore, the bicycle frame also includes a down tube, the front end of the down tube is connected to the front end of the top tube, and the rear end of the down tube is connected to the middle tube; the width of the down tube gradually increases at least partially along the riding direction of the bicycle.

[0019] The utility model has the following beneficial effects: compared with the prior art, the utility model configures an air deflector at the position where the rear fork of the bicycle frame is connected to the middle tube, and the air deflector is provided with air guide holes arranged along the length direction of the bicycle frame. Therefore, when the bicycle is ridden forward, after the airflow passes through the middle tube, the airflow will be smoothed along the air guide holes, and when the airflow passes above the connection between the middle tube and the rear fork, the airflow will not generate turbulence due to lack of support, thereby making the riding of the bicycle more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 It is a partial exploded view of the utility model;

[0023] Figure 3 This is a structural diagram of the air deflector of the utility model;

[0024] Figure 4 This is a structural diagram of the air deflector of the utility model from another perspective;

[0025] Figure 5 This is a structural diagram of the air deflector of the utility model from another perspective;

[0026] Figure 6 It is a cross-sectional view of the utility model along the half position of the air guide cover along the air guide hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Refer to the attached Figure 1-6 , a bicycle frame with reduced turbulence in an embodiment of the utility model.

[0029] The bicycle frame for reducing spoiler comprises a middle tube 3, an upper tube 4, a front fork 6, a rear fork 1 and a deflector 2, wherein the middle tube 3 is used for connecting a seat cushion, the rear end of the upper tube 4 is connected to the middle tube 3, the front fork 6 is connected to the upper tube 4 and is used for installing a front wheel, and the rear fork 1 is connected to the middle tube 3 and is used for installing a rear wheel. The deflector 2 is arranged above the rear fork 1, and the deflector 2 is at least partially located behind the middle tube 3. The deflector 2 is provided with a deflection hole 20 for deflecting flow, and the deflection hole 20 is arranged along the length direction of the bicycle frame.

[0030] In this embodiment, a deflector 2 is arranged at the position where the rear fork 1 and the middle tube 3 of the bicycle frame are connected, and the deflector 2 is provided with deflector holes 20 arranged along the length direction of the bicycle frame. Therefore, when the bicycle is ridden forward, after the airflow passes through the middle tube 3, the airflow will be smoothed along the deflector holes 20, and when the airflow passes above the connection between the middle tube 3 and the rear fork 1, the airflow will not generate turbulence due to lack of support, thereby making the riding of the bicycle more stable.

[0031] In one embodiment, in order to effectively prevent turbulence when the airflow passes over the connection between the middle tube 3 and the rear fork 1 , the number of the guide holes 20 is two, and the two guide holes 20 are located on both sides of the middle tube 3 .

[0032] In one embodiment, the rear fork 1 includes two support rods located on both sides of the rear wheel, and two air guide holes 20 are respectively located above the two support rods. The support rods include a first connecting rod 11 and a second connecting rod 12 connected to the first connecting rod 11. The first connecting rod 11 is connected to the rear wheel at one end away from the second connecting rod 12, and the second connecting rod 12 is connected to the middle tube 3 at one end away from the first connecting rod 11. The angle between the first connecting rod 11 and the second connecting rod 12 is 90°-150°, and the width of the air guide cover 2 is consistent with the width of the rear fork 1. By forming a corner between the first connecting rod 11 and the second connecting rod 12, the distance between the two first connecting rods 11 and one end of the middle tube 3 can be increased, that is, the width of the rear fork 1 is increased, and the width of the air guide cover 2 is consistent with the width of the rear fork 1, so that the width of the air guide hole 20 can be increased, and the airflow can be better guided.

[0033] In one embodiment, the air deflector 2 is detachably disposed on the rear fork 1 to facilitate installation of the air deflector 2 .

[0034] Specifically, the air deflector 2 is provided with a limiting opening 25 on the side away from the rear wheel, the limiting opening 25 is located between the two air guide holes 20, and the middle tube 3 is at least partially placed in the limiting opening 25. The air deflector 2 is provided with a hook 24 extending downward from the bottom of the side away from the rear wheel, the hook 24 is provided with a bayonet 240 on the side close to the rear wheel, the front end of the second connecting rod 12 is placed in the bayonet 240, and the bottom surface of the air deflector 2 is provided with a groove 26 adapted to the second connecting rod 12 and the first connecting rod 11. The limiting opening 25 and the groove 26 are used to limit the left and right positions of the air deflector 2, the hook 24 is used to limit the upper and lower positions of the air deflector 2, and the hook 24 is used to engage with the bottom of the second connecting rod 12, so that the air deflector 2 is installed on the bicycle frame. Of course, in other embodiments, the air deflector 2 can also be fixed by screws or other bayonet 240, or the air deflector 2 can be sleeved on the middle tube 3 and installed with the middle tube 3 by interference fit, etc. The structure of fixing the air deflector 2 on the rear fork 1 is not limited herein.

[0035] In one embodiment, the air deflector 2 includes a first cover body 23, a connecting portion 22 and a second cover body 21, two air guide holes 20 are respectively located on the first cover body 23 and the second cover body 21, the first cover body 23 and the second cover body 21 both include a plurality of side wall panels, the air deflector 20 is formed by the plurality of side wall panels, the two ends of the connecting portion 22 are respectively connected to the side wall panels of the first cover body 23 and the second cover body 21 that are close to each other, the first cover body 23 and the second cover body 21 are symmetrical structures, and the limit opening 25 is formed by the connecting portion 22, the first cover body 23 and the second cover body 21. There are two hooks 24, which are respectively arranged below the first cover body 23 and the second cover body 21, and each is fixed to a first connecting rod 11, so that the air deflector 2 can be stably fixed on the bicycle frame.

[0036] In one embodiment, the plurality of side wall panels are respectively a first panel 214, a second panel 211, a third panel 212 and a fourth panel 213, the first panel 214, the second panel 211, the third panel 212 and the fourth panel 213 are connected in sequence, the first panel 214 and the third panel 212 are arranged opposite to each other, the second panel 211 and the fourth panel 213 are arranged opposite to each other, the two ends of the connecting portion 22 are respectively connected to the first panel 214 where the first cover 23 and the second cover 21 are close to each other, part of the fourth panel 213 extends along the top surface of the second connecting rod 12, part of the fourth panel 213 extends along the top surface of the first connecting rod 11, the hook 24 is formed by extending downward from the fourth panel 213, the limiting opening 25 is formed by two first panels 214 and the connecting portion 22 surrounding each other, and the first panel 214 is at least partially located in front of the fourth panel 213. Through this structure, the width of the front end of each air deflector 2 can be gradually increased along the direction of the bicycle, so that the airflow can pass through the air guide hole 20 more smoothly, reducing the airflow obstruction during riding.

[0037] In this embodiment, the first cover body 23 , the connecting portion 22 , the second cover body 21 , and the hook 24 are all integrally formed.

[0038] In one embodiment, the width of the middle tube 3 at the end away from the rear wheel gradually increases along the riding direction of the bicycle, so that the area of ​​the middle tube 3 cutting the wind can be effectively reduced, thereby improving the aerodynamics and smoothness of the bicycle when riding.

[0039] In one embodiment, the depth of the limit opening 25 is greater than one third of the width of the middle tube 3, and the depth of the limit opening 25 is less than two thirds of the width of the middle tube 3. It should be understood that the front end of the air guide cover 2 is located on the side wall of the middle tube 3, and close to the middle of the middle tube 3, and the width of the middle tube 3 gradually increases along the riding direction of the bicycle, so that the airflow passing through the middle tube 3 can be directly guided into the guide hole 20 to prevent the generation of turbulence.

[0040] In one embodiment, the bicycle frame further includes a down tube 5, the front end of the down tube 5 is connected to the front end of the top tube 4, and the rear end of the down tube 5 is connected to the middle tube 3. The width of the down tube 5 is gradually increased at least partially along the riding direction of the bicycle, thereby reducing the area of ​​the down tube 5 cutting the wind, and improving the aerodynamics and the smoothness of the airflow when riding the bicycle.

[0041] 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.

[0042] 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 technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0043] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A bicycle frame for reducing turbulence, characterized in that: include: A center tube for connecting the seat cushion; The upper tube connected to the middle tube at the rear end; A rear fork connected to the mid-tube and used to mount the rear wheel; The air deflector is arranged above the rear fork, and at least part of the air deflector is located behind the middle tube. The air deflector is provided with air diversion holes for diverting air, and the air diversion holes are arranged along the length direction of the bicycle frame.

2. The bicycle frame for reducing turbulence according to claim 1, characterized in that: The number of the guide holes is two, and the two guide holes are located on both sides of the middle tube.

3. The bicycle frame for reducing turbulence according to claim 2, characterized in that: The rear fork includes two support rods located on both sides of the rear wheel, the two guide holes are respectively located above the two support rods, the support rod includes a first connecting rod and a second connecting rod connected to the first connecting rod, the first connecting rod is connected to the rear wheel at one end away from the second connecting rod, the second connecting rod is connected to the middle tube at one end away from the first connecting rod, the angle between the first connecting rod and the second connecting rod is 90°-150°, and the width of the air deflector is consistent with the width of the rear fork.

4. The bicycle frame for reducing turbulence according to claim 3, characterized in that: The air deflector is detachably arranged on the rear fork.

5. The bicycle frame for reducing turbulence according to claim 4, characterized in that: The air deflector has a limiting opening on the side away from the rear wheel, the limiting opening is located between the two air guide holes, and the middle tube is at least partially placed in the limiting opening; the air deflector has a hook extending downward from the bottom on the side away from the rear wheel, the hook has a bayonet opening on the side close to the rear wheel, the front end of the second connecting rod is placed in the bayonet opening, and the bottom surface of the air deflector has a groove matching the second connecting rod and the first connecting rod.

6. The bicycle frame for reducing turbulence according to claim 5, characterized in that: The air guide cover includes a first cover body, a connecting portion and a second cover body, the two air guide holes are respectively located on the first cover body and the second cover body, the first cover body and the second cover body both include a plurality of side wall panels, the air guide holes are formed by surrounding the plurality of side wall panels, the two ends of the connecting portion are respectively connected to the side wall panels of the first cover body and the second cover body that are close to each other, the first cover body and the second cover body are symmetrical structures, the limit opening is formed by surrounding the connecting portion, the first cover body and the second cover body; the number of the hooks is two, and they are respectively arranged below the first cover body and the second cover body.

7. The bicycle frame for reducing turbulence according to claim 6, characterized in that: The multiple side wall panels are respectively a first panel, a second panel, a third panel and a fourth panel, the first panel, the second panel, the third panel and the fourth panel are connected in sequence, the first panel and the third panel are arranged opposite to each other, the second panel and the fourth panel are arranged opposite to each other, the two ends of the connecting part are respectively connected to the first panel where the first cover body and the second cover body are close to each other, part of the fourth panel extends along the top surface of the second connecting rod, and part of the fourth panel extends along the top surface of the first connecting rod, the hook is formed by the fourth panel extending downward, and the limit opening is formed by two first panels and the connecting part surrounding it; the first panel is at least partially located in front of the fourth panel.

8. The bicycle frame for reducing turbulence according to claim 7, characterized in that: The width of the middle tube at the end away from the rear wheel gradually increases along the riding direction of the bicycle.

9. The bicycle frame for reducing turbulence according to claim 8, characterized in that: The depth of the limiting opening is greater than one third of the width of the middle tube, and the depth of the limiting opening is less than two thirds of the width of the middle tube.

10. The bicycle frame for reducing turbulence according to any one of claims 1 to 9, characterized in that: The bicycle frame also includes a down tube, a front end of which is connected to a front end of an upper tube, and a rear end of which is connected to a middle tube; and a width of the down tube gradually increases at least partially along a riding direction of the bicycle.

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