Novel frame structure

Abstract

The utility model relates to the technical field of bicycles, in particular to a novel frame structure which comprises a lower tube and a head tube, a closing part is arranged at the end, connected with the head tube, of the lower tube, a groove is formed in the end, connected with the head tube, of the closing part, and the width of the closing part is gradually reduced in the direction close to the head tube. A cambered surface corresponding to the outer surface of the head pipe is formed at one end, connected with the head pipe, of the closing-in part, and the cambered surface is matched with the outer surface of the head pipe through the closing-in part. The width of the closing part is gradually reduced in the direction close to the head pipe, so that the width of the end, making contact with the head pipe, of the closing part is reduced, namely, gaps between the lower pipe and the two sides of the head pipe are not reduced, and the cambered surface is matched with the outer surface of the head pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a bicycle with a novel frame structure. Background Art

[0002] Bicycles are a means of transportation that can be used for walking and traveling, and can also be used as fitness equipment for riding and cycling. Secondly, existing bicycles have a down tube and a head tube, and the down tube and the head tube are connected by welding. The outer surface of the head tube is an arc surface, but the end of the down tube is a plane, so there is a gap when the two are close together. Even if the end of the down tube is made into an arc surface, there is still a gap between the down tube and the two sides of the head tube, and this gap affects the appearance and affects the welding strength. Summary of the invention

[0003] The utility model aims to provide a novel frame structure, in which the width of the closing portion is gradually reduced in the direction close to the head pipe so that the width of the end of the closing portion contacting the head pipe becomes smaller, that is, the gap between the lower tube and the two sides of the head pipe becomes smaller, and then the arc surface is matched with the outer surface of the head pipe, thereby solving the problem of the gap between the lower tube and the head pipe.

[0004] The purpose of the utility model is achieved in this way:

[0005] A novel frame structure comprises a down tube and a head tube, wherein one end of the down tube connected to the head tube is provided with a closing portion, one end of the closing portion connected to the head tube is provided with a groove, and the width of the closing portion gradually decreases in a direction approaching the head tube, and one end of the closing portion connected to the head tube is formed with an arc surface corresponding to the outer surface of the head tube, and the arc surface is matched with the outer surface of the head tube by the arrangement of the closing portion.

[0006] Preferably, grooves are provided on both upper and lower sides of one end of the closing portion connected to the head pipe.

[0007] Preferably, the shape of the groove before closing is composed of two trapezoids, and the upper bases of the two trapezoids are connected and communicated. When the closing part is closed, the shape of the groove is T-shaped.

[0008] Preferably, the inner wall of the lower tube is provided with a convex strip on one side of the groove to increase the strength.

[0009] Preferably, the upper and lower sides of the end where the closing portion is connected to the head pipe correspond to the outer surface of the head pipe formed as inwardly concave arc surfaces, and the left and right sides of the end where the closing portion is connected to the head pipe correspond to the outer surface of the head pipe formed as outwardly convex arc surfaces.

[0010] Preferably, a support plate is built into the lower tube, and the support plate is used to support the inner wall of the lower tube and can be used to place items, and an opening is formed on the support plate at one end close to the head tube.

[0011] Preferably, the down tube is provided with a mounting shaft at one end away from the head tube, and a riser is provided on the mounting shaft, and a connecting groove is provided on the down tube corresponding to the riser.

[0012] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0013] The utility model facilitates closing by setting the groove, and the width of the closing portion gradually decreases along the direction close to the head pipe, so that the width of the end of the closing portion that contacts the head pipe becomes smaller, that is, the gap between the down tube and the two sides of the head pipe becomes smaller, thereby making the arc surface coincide with the outer surface of the head pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 Schematic diagram of the structure of the lower tube.

[0016] Figure 3 It is a schematic diagram of the structure of the lower tube from a top view.

[0017] Figure 4 It is a schematic diagram of the structure of one end where the down tube is connected to the head tube.

[0018] Figure 5 It is a schematic diagram of the structure of the unclosed lower tube.

[0019] Reference numerals: 1-lower tube; 11-closing portion; 12-groove; 13-convex strip; 14-support plate;

[0020] 141-opening; 15-connection groove; 2-head pipe; 3-mounting shaft; 4-seated pipe. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-Figure 4 As shown, a novel frame structure includes a down tube 1 and a head tube 2, and a closing portion 11 is provided at one end of the down tube 1 connected to the head tube 2, and a groove 12 is provided at one end of the closing portion 11 connected to the head tube 2, and the width of the closing portion 11 gradually decreases along the direction approaching the head tube 2, and an arc surface is formed on the outer surface of the head tube 2 corresponding to the end of the closing portion 11 connected to the head tube 2, and the arc surface is matched with the outer surface of the head tube 2 by the setting of the closing portion 11.

[0023] Therefore, in actual use, the groove 12 is provided to facilitate closing, and the width of the closing portion 11 is gradually reduced in the direction close to the head pipe 2, so that the width of the end of the closing portion 11 that contacts the head pipe 2 becomes smaller, that is, the gap between the down tube 1 and the two sides of the head pipe 2 becomes smaller, and then the arc surface is consistent with the outer surface of the head pipe 2, so it has a better appearance, that is, beautiful, and also reduces the influence on the welding strength.

[0024] There are two grooves 12 , and the specific structure is as follows: grooves 12 are provided on both upper and lower sides of one end of the closing portion 11 connected to the head pipe 2 .

[0025] At the same time, the shape of the groove 12 is firstly as Figure 5 As shown, the shape of the groove 12 before closing is composed of two trapezoids, and the upper bases of the two trapezoids are connected and communicated. Figure 2-Figure 4 As shown, when the closing portion 11 is closed, the shape of the groove 12 is T-shaped.

[0026] Furthermore, a convex strip 13 is provided on the inner wall of the lower tube 1 at one side of the groove 12 to increase the strength.

[0027] like Figure 1-Figure 4 As shown, the upper and lower sides of the end where the closing portion 11 is connected to the head pipe 2 correspond to the outer surface of the head pipe 2 formed as inwardly concave arc surfaces, and the left and right sides of the end where the closing portion 11 is connected to the head pipe 2 correspond to the outer surface of the head pipe 2 formed as outwardly convex arc surfaces.

[0028] Therefore, in actual use, the concave and convex configurations can better fit the surface of the head pipe 2.

[0029] like Figure 1-Figure 4 As shown, a support plate 14 is built into the down tube 1 , and the support plate 14 is used to support the inner wall of the down tube 1 and can be used to place items, and an opening 141 is formed at one end of the support plate 14 close to the head tube 2 .

[0030] Therefore, in actual use, the support plate 14 is provided to support the inner wall of the lower tube 1 and can be used to place items, and the opening 141 is provided to facilitate closing.

[0031] like Figure 1 As shown, a mounting shaft 3 is provided at one end of the down tube 1 away from the head tube 2 , a seat tube 4 is provided on the mounting shaft 3 , and a connecting groove 15 is provided on the down tube 1 corresponding to the seat tube 4 .

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. At the same time, the utility model is not limited by the above embodiments, so without departing from the principle and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model claimed for protection.

Claims

1. A new frame structure, characterized in that: The invention comprises a down tube (1) and a head tube (2), wherein one end of the down tube (1) connected to the head tube (2) is provided with a closing portion (11), one end of the closing portion (11) connected to the head tube (2) is provided with a groove (12), and the width of the closing portion (11) gradually decreases in a direction approaching the head tube (2), and one end of the closing portion (11) connected to the head tube (2) is formed with an arc surface corresponding to the outer surface of the head tube (2), and the arc surface is matched with the outer surface of the head tube (2) by the arrangement of the closing portion (11).

2. A novel frame structure according to claim 1, characterized in that: Grooves (12) are provided on both upper and lower sides of one end of the closing portion (11) connected to the head pipe (2).

3. A novel frame structure according to claim 1, characterized in that: The shape of the groove (12) before closing is composed of two trapezoids, and the upper bases of the two trapezoids are connected and communicated. When the closing portion (11) is closed, the shape of the groove (12) is T-shaped.

4. A novel frame structure according to claim 1, characterized in that: The inner wall of the lower tube (1) is provided with a convex strip (13) on one side of the groove (12) to increase the strength.

5. The novel frame structure according to claim 1 is characterized in that: The upper and lower sides of the end where the closing portion (11) is connected to the head pipe (2) correspond to the outer surface of the head pipe (2) formed as inwardly concave arc surfaces, and the left and right sides of the end where the closing portion (11) is connected to the head pipe (2) correspond to the outer surface of the head pipe (2) formed as outwardly convex arc surfaces.

6. A novel frame structure according to any one of claims 1 to 5, characterized in that: The lower tube (1) has a built-in support plate (14), and the support plate (14) is used to support the inner wall of the lower tube (1) and can be used to place items, and the support plate (14) is provided with an opening (141) at one end close to the head tube (2).

7. A novel frame structure according to any one of claims 1 to 5, characterized in that: The down tube (1) is provided with a mounting shaft (3) at one end away from the head tube (2), a stand tube (4) is provided on the mounting shaft (3), and a connecting groove (15) is provided on the down tube (1) corresponding to the stand tube (4).

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