Vertical pipe, frame and two-wheeled vehicle

Abstract

The utility model relates to a standpipe, a frame and a two-wheeled vehicle, which comprise a fixed seat, a connecting pipe and a joint which are connected in sequence, the fixed seat is used for installing a handlebar, and the joint is used for being connected with a front fork; the connecting pipe is sectioned in a first plane perpendicular to the extending direction of the connecting pipe to form a cross section, the size of the cross section in the first direction is smaller than the size of the cross section in the second direction perpendicular to the riding direction of the bicycle, and / or the wall thickness of the cross section in the first direction is smaller than the wall thickness of the cross section in the second direction. Such that a moment of inertia of the cross-section with respect to a first axis extending in the first direction is greater than a moment of inertia of the cross-section with respect to a second axis extending in the second direction; the second direction is perpendicular to the first direction. Compared with the mode that a round pipe is adopted in the prior art, the lateral rigidity of the vertical pipe is improved, and the use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of two-wheeled vehicles, in particular to a vertical pipe, a frame and a two-wheeled vehicle. Background Art

[0002] Two-wheeled vehicles have become an important means of transportation for people due to their advantages of being light, convenient and environmentally friendly. Among them, bicycles, as an important two-wheeled vehicle, can not only be used as an environmentally friendly means of transportation for travel, but also as fitness equipment for riding and traveling, becoming an important travel and fitness tool in people's daily life.

[0003] The frame of the two-wheeled vehicle includes a vertical tube, which includes a joint, a connecting pipe and a fixing seat connected in sequence, the joint is connected to the front fork, the front fork is used to install the front wheel, and the fixing seat is used to install the handlebar. When riding, the rider holds the handlebar and changes the direction of the front wheel by manipulating the handlebar, thereby changing the direction of the two-wheeled vehicle.

[0004] When operating the handlebars to change the direction of travel of the two-wheeled vehicle, the rider applies force to the vertical tube through the handlebars, and the vertical tube transmits the force to the front fork, and finally transmits it to the front wheel through the front fork. In order to ensure the force transmission effect, the vertical tube needs to have good lateral rigidity. However, traditional vertical tubes are all round tubes, which have the problem of poor lateral rigidity. Utility Model Content

[0005] Based on this, it is necessary to provide a stem tube, a frame and a two-wheeled vehicle that can improve the lateral rigidity in order to solve the problem that the stem tube has poor lateral rigidity.

[0006] A vertical tube, used for a two-wheeled vehicle, comprises a fixing seat, a connecting pipe and a joint connected in sequence, wherein the fixing seat is used to install a handlebar, and the joint is used to connect to a front fork;

[0007] The connecting tube is hollow, and a cross section is formed by cutting the connecting tube with a first plane perpendicular to the extending direction of the connecting tube. The size of the cross section in the first direction is smaller than the size of the cross section in the second direction perpendicular to the riding direction of the two-wheeled vehicle and / or the wall thickness of the cross section in the first direction is smaller than the wall thickness of the cross section in the second direction, so that the moment of inertia of the cross section with respect to the first axis extending in the first direction is greater than the moment of inertia of the cross section with respect to the second axis extending in the second direction; the second direction is perpendicular to the first direction.

[0008] In one embodiment, the cross-section of the connecting tube is in the shape of an elliptical ring, the major axis of the elliptical ring is parallel to the second direction, and the minor axis of the elliptical ring is parallel to the first direction.

[0009] In one embodiment, the connecting tube includes a body and a first reinforcing rib, the body is a round tube, and the first reinforcing rib is protruding from at least one end of the body in the second direction.

[0010] In one of the embodiments, the first reinforcing ribs are protrudingly provided at both ends of the main body in the second direction, and the first reinforcing ribs at both ends are in the shape of lugs and are symmetrically arranged about the center of the main body.

[0011] In one embodiment, the connecting pipe further comprises a second reinforcing rib, and the second reinforcing rib is convexly disposed on at least one end of the body in the first direction;

[0012] A height of the second reinforcing rib protruding from the body is smaller than a height of the first reinforcing rib protruding from the body.

[0013] In one of the embodiments, the second reinforcing ribs are protrudingly provided at both ends of the main body in the first direction, and the second reinforcing ribs at both ends are in the shape of lugs and are symmetrically arranged about the center of the main body.

[0014] In one embodiment, the connecting tube is a metal tube or a carbon fiber tube.

[0015] In one embodiment, the fixing seat, the connecting pipe and the joint are welded, glued or integrally formed.

[0016] A bicycle frame comprises a frame body, a front fork and a vertical tube as described above, wherein the vertical tube and the front fork are both mounted on the frame body, and the front fork is connected to the joint.

[0017] A two-wheeled vehicle comprises the frame as described above.

[0018] The vertical tube, frame and two-wheeled vehicle are configured such that the size of the cross section of the connecting tube in the second direction is larger than its size in the first direction and / or the wall thickness of the cross section in the second direction is larger than its wall thickness in the first direction, so that the moment of inertia of the cross section of the connecting tube with respect to the first axis extending in the first direction is larger than the moment of inertia of the cross section with respect to the second axis extending in the second direction. Compared with the method of using a round tube in the prior art (the moments of inertia of the cross section of the round tube with respect to the first axis and the second axis are equal), the lateral rigidity of the vertical tube is improved to meet the use requirements. Moreover, when the vertical tube is applied to a foldable two-wheeled vehicle, the above configuration can avoid the vertical tube from interfering with the main beam tube after folding, resulting in an increase in the folding width, and can also maximize the rigidity of the vertical tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A side view of a vertical pipe provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 A front view of the standpipe shown in ;

[0021] Figure 3 for Figure 1 A cross-sectional view of the connecting pipe of the vertical pipe shown in ;

[0022] Figure 4 for Figure 3 Dimensioning drawing of the connecting pipe shown in;

[0023] Figure 5 A cross-sectional view of a connecting pipe of a vertical pipe provided in another embodiment of the present application.

[0024] Description of reference numerals:

[0025] 100, vertical pipe; 10, fixing seat; 20, connecting pipe; 21, cross section; 22, main body; 23, first reinforcing rib; 24, second reinforcing rib; 30, joint; 31, first part; 32, second part; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the 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 violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] See also Figure 1 and Figure 2 In one embodiment of the present application, a vertical tube 100 is provided. The vertical tube 100 is used in a two-wheeled vehicle and includes a fixing seat 10, a connecting pipe 20 and a joint 30 connected in sequence. That is, the connecting pipe 20 is provided with a fixing seat 10 and a joint 30 at both ends in the extension direction. The fixing seat 10 is used to install the handlebar, and the joint 30 is used to connect to the front fork.

[0033] For further information, see Figure 3, the connecting tube 20 is cut with a first plane perpendicular to the extending direction of the connecting tube 20 to form a cross section 21, the size of the cross section 21 in the first direction X is smaller than the size of the cross section 21 in the second direction Y and / or the wall thickness of the cross section 21 in the first direction X is smaller than the wall thickness of the cross section 21 in the second direction Y, so that the moment of inertia of the cross section 21 with respect to the first axis extending in the first direction is greater than the moment of inertia of the cross section 21 with respect to the second axis extending in the second direction. Wherein, the second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the riding direction (forward direction) of the two-wheeled vehicle. It should be noted here that the first direction X and the second direction Y are both located in the same cross section 21. The size of the cross section 21 in the first direction X is smaller than the size of the cross section 21 in the second direction Y, which means that the maximum size of the cross section 21 in the first direction X is smaller than the maximum size of the cross section 21 in the second direction Y. The wall thickness of the cross section 21 in the first direction X is smaller than the wall thickness of the cross section 21 in the second direction Y, which means that the maximum wall thickness of the cross section 21 in the first direction X is smaller than the maximum wall thickness of the cross section 21 in the second direction Y. It should also be noted here that the moment of inertia is a geometric quantity, which is usually used to describe the properties of a cross-section that resists bending. The moment of inertia of a cross-section about an axis is related to the cross-sectional dimension in a direction perpendicular to the axis and the wall thickness of the cross-section.

[0034] In some specific embodiments, when the connecting tube 20 extends in the vertical direction, that is, the extending direction of the connecting tube 20 is parallel to the vertical direction, at this time, the cross section 21 is perpendicular to the vertical direction, and the first direction X is parallel to the riding direction. In other specific embodiments, when the connecting tube 20 does not extend in the vertical direction, that is, the extending direction of the connecting tube 20 is inclined relative to the vertical direction, at this time, the cross section 21 is not perpendicular to the vertical direction, and the first direction X is inclined relative to the riding direction.

[0035] The vertical tube 100 provided in the embodiment of the present application is configured such that the size of the cross section 21 of the connecting tube 20 in the second direction Y is larger than its size in the first direction X and / or the wall thickness of the cross section 21 in the second direction Y is larger than its wall thickness in the first direction X, so that the moment of inertia of the cross section 21 of the connecting tube 20 with respect to the first axis extending in the first direction X is larger than the moment of inertia of the cross section 21 with respect to the second axis extending in the second direction Y. Compared with the method of using a round tube in the prior art (the moments of inertia of the cross section of the round tube with respect to the first axis and the second axis are equal), the lateral rigidity of the vertical tube 100 is improved to meet the use requirements. Moreover, when the vertical tube 100 is applied to a foldable two-wheeled vehicle, the above configuration can avoid the situation that the vertical tube 100 interferes with the main beam tube after folding, resulting in an increase in the folding width, and can maximize the rigidity of the vertical tube 100.

[0036] In some embodiments, continue to refer to Figure 3, the cross section 21 of the connecting tube 20 is in the shape of an elliptical ring. Thus, the long axis direction of the elliptical ring is parallel to the second direction Y, and the short axis direction of the elliptical ring is parallel to the first direction X. When the cross section 21 of the connecting tube 20 is in the shape of an elliptical ring, the maximum dimension of the cross section 21 in the first direction X is smaller than the maximum dimension of the cross section in the second direction Y, and at this time, the wall thickness of the cross section 21 in the first direction X is equal to the wall thickness in the second direction Y.

[0037] See also Figure 4 According to the formula of moment of inertia, the moment of inertia of the cross section 21 of the connecting pipe 20 of the vertical pipe 100 provided in the embodiment of the present application relative to the first axis extending in the first direction X is: x =πL 3 D / 64-π(L-2t) 3 (D-2t) / 64, the moment of inertia of the cross section 21 relative to the second axis extending in the second direction Y is I y =πD 3 L / 64-π(D-2t) 3 (L-2t) / 64. Wherein, D is the outer diameter of the cross section 21 in the first direction X (the maximum dimension of the cross section 21 in the first direction X), L is the outer diameter of the cross section 21 in the second direction Y (the maximum dimension of the cross section 21 in the second direction Y), and t is the wall thickness of the connecting pipe 20.

[0038] I x -I y =[πL 3 D / 64-π(L-2t) 3 (D-2t) / 64]-[πD 3 L / 64-π(D-2t) 3 (L-2t) / 64]. Through calculation, we can find that I x -I y In this way, the cross section 21 of the connecting pipe 20 is set to an elliptical ring shape, so that the moment of inertia of the cross section 21 of the connecting pipe 20 with respect to the first axis extending in the first direction X is greater than the moment of inertia of the second axis extending in the second direction Y of the cross section 21, thereby improving the lateral rigidity of the vertical pipe 100 and meeting the use requirements.

[0039] In some other embodiments, the cross section 21 of the connecting pipe 20 can also be set to other irregular shaped structures. Figure 5The connecting pipe 20 includes a body 22 and a first reinforcing rib 23. The body 22 is a round tube. The first reinforcing rib 23 is convexly arranged at least one end of the body 22 in the second direction Y. In this way, the outer diameter of the cross section 21 of the connecting pipe 20 in the second direction Y can be greater than its outer diameter in the first direction X, and the wall thickness of the cross section 21 of the connecting pipe 20 in the second direction Y is greater than the wall thickness of the cross section 21 in the first direction X. At this time, the moment of inertia of the cross section 21 with respect to the first axis extending in the first direction X is: the sum of the moment of inertia of the cross section corresponding to the body 22 with respect to the first axis extending in the first direction X and the moment of inertia of the cross section corresponding to the first reinforcing rib 23 with respect to the first axis extending in the first direction X, and the moment of inertia of the second axis extending in the second direction Y of the cross section 21 is the moment of inertia of the cross section corresponding to the body 22 with respect to the first axis extending in the first direction X. It can be seen that the moment of inertia of the cross section 21 of the connecting pipe 20 with respect to the first axis extending in the first direction X is greater than the moment of inertia of the second axis extending in the second direction Y of the cross section 21, thereby improving the lateral rigidity of the vertical pipe 100 and meeting the use requirements.

[0040] Specifically, both ends of the body 22 in the second direction Y are provided with first reinforcing ribs 23, and the first reinforcing ribs 23 at both ends are in the shape of lugs and are symmetrically arranged about the center of the body 22. In this way, the structure of the connecting pipe 20 is symmetrical, which facilitates the processing and manufacturing of the connecting pipe 20. It is conceivable that in other embodiments, one end of the body 22 in the second direction Y may be provided with a first reinforcing rib 23, which is not limited here.

[0041] Furthermore, the connecting tube 20 further includes a second reinforcing rib 24, which is protruded from at least one end of the body 22 in the first direction X. The height of the second reinforcing rib 24 protruding from the body 22 is less than the height of the first reinforcing rib 23 protruding from the body 22. The second reinforcing rib 24 not only plays a role in reinforcing the connecting tube 20; at the same time, the provision of the second reinforcing rib 24 will not cause the outer diameter of the cross section 21 of the connecting tube 20 in the first direction X to be greater than the outer diameter in the second direction Y, and will not cause the wall thickness of the cross section 21 of the connecting tube 20 in the first direction X to be greater than the wall thickness of the cross section 21 in the second direction Y, thereby ensuring that the moment of inertia of the cross section 21 with respect to the first axis extending in the first direction X is greater than the moment of inertia of the second axis extending in the second direction Y of the cross section 21, thereby improving the lateral rigidity of the vertical tube 100 and meeting the use requirements.

[0042] In some specific embodiments, the body 22 has two ends in the first direction X with a second reinforcing rib 24 protruding therefrom, and the second reinforcing ribs 24 at both ends are in the shape of lugs and are symmetrically arranged about the center of the body 22. In this way, the strength of the connecting pipe 20 can be further improved. It is conceivable that in some other specific embodiments, the body 22 may also have one end in the first direction X with a second reinforcing rib 24 protruding therefrom, which is not limited here.

[0043] It can be understood that in some other embodiments, the shape of the cross section 21 of the connecting tube 20 can also be set in other ways, such as the size of the cross section 21 in the first direction X can be set to be smaller than the size of the cross section 21 in the second direction Y, while the wall thickness of the cross section 21 in the first direction X is slightly larger than the wall thickness of the cross section 21 in the second direction Y, or the size of the cross section 21 in the first direction X is set to be slightly larger than the size of the cross section 21 in the second direction Y, and the wall thickness of the cross section 21 in the first direction X is smaller than the wall thickness of the cross section 21 in the second direction Y. As long as the moment of inertia of the cross section 21 with respect to the first axis extending in the first direction is greater than the moment of inertia of the cross section 21 with respect to the second axis extending in the second direction, any setting method is acceptable and is not limited here.

[0044] In some embodiments, the connecting tube 20 is a metal tube or a carbon fiber tube. Specifically, the joint 30 and the fixing seat 10 are made of the same material as the connecting tube 20. It is conceivable that in other embodiments, the material used for the connecting tube 20 is not limited, such as the connecting tube 20 can be made of a plastic material, and the joint 30 and the fixing seat 10 are also made of a plastic material.

[0045] Furthermore, the fixing seat 10, the connecting pipe 20 and the joint 30 are welded, glued or integrally formed.

[0046] In some specific embodiments, the joint 30 includes a first portion 31 and a second portion 32 connected to each other, and the first portion 31 and the second portion 32 can rotate relative to each other to facilitate the folding or unfolding of the two-wheeled vehicle. It should be understood that in other embodiments, the structure of the joint 30 is not limited, as long as it can achieve the effect of connecting with the front fork.

[0047] Another embodiment of the present application further provides a bicycle frame, including a frame body, a front fork and the above-mentioned stem tube 100, wherein the stem tube 100 and the front fork are both mounted on the frame body, and the front fork is connected to the joint 30. Since the stem tube 100 has beneficial effects, the bicycle frame including the stem tube 100 has the same beneficial effects, which will not be described in detail herein.

[0048] Another embodiment of the present application further provides a two-wheeled vehicle including the above-mentioned frame. Since the vertical tube 100 and the frame have beneficial effects, the two-wheeled vehicle has the same beneficial effects, which will not be described in detail herein.

[0049] In some specific embodiments, the two-wheeled vehicle is a bicycle. It is conceivable that in other embodiments, the type of the two-wheeled vehicle is not limited.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0051] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A vertical pipe for a two-wheeled vehicle, characterized in that: It comprises a fixing seat (10), a connecting pipe (20) and a joint (30) which are connected in sequence, wherein the fixing seat (10) is used to install a handlebar, and the joint (30) is used to be connected to a front fork; The connecting tube (20) is hollow, and the connecting tube (20) is cut along a first plane perpendicular to the extending direction of the connecting tube (20) to form a cross section (21); the size of the cross section (21) in a first direction (X) is smaller than the size of the cross section (21) in a second direction (Y) perpendicular to the riding direction of the two-wheeled vehicle, and / or the wall thickness of the cross section (21) in the first direction (X) is smaller than the wall thickness of the cross section (21) in the second direction (Y), so that the moment of inertia of the cross section (21) with respect to a first axis extending in the first direction is greater than the moment of inertia of the cross section (21) with respect to a second axis extending in the second direction; the second direction (Y) is perpendicular to the first direction (X).

2. The vertical pipe according to claim 1, characterized in that The cross section (21) of the connecting pipe (20) is in the shape of an elliptical ring, the major axis direction of the elliptical ring is parallel to the second direction (Y), and the minor axis direction of the elliptical ring is parallel to the first direction (X).

3. The standpipe according to claim 1, characterized in that The connecting tube (20) comprises a main body (22) and a first reinforcing rib (23); the main body (22) is a round tube; and the first reinforcing rib (23) is protruding from at least one end of the main body (22) in the second direction (Y).

4. The standpipe according to claim 3, characterized in that The first reinforcing ribs (23) are protrudingly provided at both ends of the body (22) in the second direction (Y); the first reinforcing ribs (23) at both ends are in the shape of lugs and are symmetrically arranged about the center of the body (22).

5. The vertical pipe according to claim 3, characterized in that: The connecting pipe (20) further comprises a second reinforcing rib (24), wherein the second reinforcing rib (24) is protrudingly provided at least one end of the main body (22) in the first direction (X); The height of the second reinforcing rib (24) protruding from the body (22) is smaller than the height of the first reinforcing rib (23) protruding from the body (22).

6. The standpipe according to claim 5, characterized in that The second reinforcing ribs (24) are protrudingly provided at both ends of the body (22) in the first direction (X); the second reinforcing ribs (24) at both ends are in the shape of lugs and are symmetrically arranged about the center of the body (22).

7. The standpipe according to claim 1, characterized in that The connecting tube (20) is a metal tube or a carbon fiber tube.

8. The standpipe according to claim 1, characterized in that The fixing seat (10), the connecting pipe (20) and the joint (30) are welded, glued or integrally formed.

9. A vehicle frame, characterized in that: It comprises a frame, a front fork and a vertical tube as claimed in any one of claims 1 to 8, wherein the vertical tube and the front fork are both mounted on the frame, and the front fork is connected to the joint (30).

10. A two-wheeled vehicle, characterized in that: Comprising the frame as claimed in claim 9.

Images