Seat tube connecting structure and bicycle comprising same

Abstract

The utility model provides a seat tube connecting structure and a bicycle comprising the same. The seat tube connecting structure is provided with an extending end connected with the frame, a receiving cavity for receiving the seat tube and a seat tube tightening piece; the extending end is hollow and extends into a pipe of the frame during connection to realize insertion; and the seat tube tightening piece is used for tightly pushing the seat tube in the receiving cavity so as to clamp and fix the seat tube. The seat tube connecting structure and the bicycle obtained through the seat tube connecting structure have the advantages that the appearance is smooth and attractive, the clamping principle is simple and stable, materials are easy to obtain, operation and adjustment are convenient, and stability is high.

Description

Technical Field

[0001] The utility model relates to a connection structure for a seat tube of a bicycle seat, in particular to a seat tube connection structure which is installed in a bicycle frame tube and is used for detachably connecting the seat. Background Art

[0002] In recent years, as low-carbon and healthy lifestyle concepts have gradually become the mainstream concept of modern urban people, bicycles have once again entered people's field of vision as a means of transportation for travel, exercise, and outings, and have become a must-have for short-distance or even long-distance travel on weekends, holidays, or vacations. And with the growing demand for bicycles, especially for cycling enthusiasts, self-help functions such as adjusting bicycle performance at any time and adjusting seat height according to needs have also become new demands for bicycle design by "enthusiasts".

[0003] At the same time, in addition to the need for manual adjustment / debugging, since bicycles are no longer just a means of transportation, for "car players", smoothness and aesthetics in vehicle design have gradually become mainstream demands and important considerations. Utility Model Content

[0004] In view of the above-mentioned current status of the art, the utility model provides a seat tube connection structure and a bicycle including the structure. The provided seat tube joint firstly realizes insertion connection with a frame (such as an upper tube or a middle tube, etc.) by providing a hollow extension insertion end with a certain length. The extension end not only realizes weight reduction by making a hole in the hollow, but also increases the pipe material of the insertion end by matching the shape and length with the middle tube and / or the upper tube, thereby maintaining the smoothness of welding of the specific shape of the middle tube and / or the upper tube, and realizing a smooth and beautiful appearance; secondly, the joint of the structure is also provided with a concealed clamping member, which can realize the clamping of the received seat tube by simply pushing / sliding two inclined blocks relative to each other. The clamping principle is simple and stable, the materials are easy to obtain, the operation and adjustment are convenient, and the stability is high. Therefore, the seat tube connection structure and the bicycle obtained by the structure have the advantages of smooth and beautiful appearance, simple and stable clamping principle, easy to obtain materials, convenient operation and adjustment, and high stability.

[0005] Specifically, the utility model provides a seat tube connection structure, which comprises an extension end connected to a frame, a receiving cavity for receiving the seat tube, and a seat tube clamping member. The extension end is configured to be hollow and is inserted into a tube of the frame when connected; the seat tube clamping member clamps and fixes the seat tube by pushing the seat tube in the receiving cavity.

[0006] Furthermore, the main body of the seat tube connection structure also has a housing cavity for the seat tube pressing member, which is connected to the receiving cavity. Specifically, the seat tube pressing member includes a screw, a push block and a slider. The screw and the push block have matching threads, and the opposing surfaces of the push block and the slider are both configured as inclined surfaces that can slide relative to each other; the push block and the slider are pushed closer by tightening the screw, and thereby the slider moves along the inclined surface toward the seat tube to press the seat tube.

[0007] Preferably, in the seat tube clamping member, a screw passes through a slider at the upper portion of the accommodating chamber and is connected to a push block at the lower portion, and the upper slider is pushed toward the lower push block by gradually tightening the screw, and the slider is moved downward along the inclined surface and toward the seat tube by the push block abutting against the wall of the accommodating chamber to tighten the seat tube.

[0008] Optionally, the arrangement of the slider and the push block in the seat tube clamping member may be opposite to the above scheme, that is, a push block is arranged at the upper part of the accommodating chamber and a slider is arranged at the lower part. In this case, the accommodating chamber has a thread that cooperates with the screw. The upper push block is pushed toward the lower slider by gradually tightening the screw. The push block abuts against the wall of the accommodating chamber to make the slider move along the inclined surface toward the seat tube to tighten the seat tube.

[0009] Furthermore, the slider has a through hole (e.g., an elliptical cross-section) for the screw to pass through and relatively displace; the surface of the slider facing the seat tube has a shape that matches the seat tube (e.g., an arc-shaped surface that matches the contact surface of the seat tube), and the friction can be increased by sandblasting the outer surface of the seat tube or the opposite surface.

[0010] Preferably, the receiving cavity is communicated with the extended end of the frame middle tube, and both are configured as a hollow tube (eg, teardrop or circular) having a seat tube cross-sectional shape, so that the seat tube passes through the entire seat tube connection structure and enters the middle tube.

[0011] Preferably, the extension end is configured as a hollow tube with a certain length and the same cross-sectional shape as the inserted tube. For example, the extension end of the upper tube may be a hollow tube with a trapezoidal cross-section, while the extension end of the middle tube may be a hollow tube with a teardrop-shaped or circular cross-section. Preferably, after the extension end is inserted into the tube of the frame, the seat tube connection structure is further fixedly connected to the frame by welding. The tube material to be butted against the extension insertion end is increased by matching the shape and length, thereby maintaining the smoothness of the welding of the specific shape of the middle tube and / or the upper tube.

[0012] In addition, the seat tube connection structure further comprises a dust cover for shielding part of the receiving cavity (except the seat tube), the seat tube pressing member and / or the accommodating cavity.

[0013] Meanwhile, the utility model also provides a bicycle, which comprises the above-mentioned seat tube connection structure.

[0014] The utility model provides a bicycle seat tube connection structure with a concealed, beautiful and smooth appearance and a bicycle including the structure. The structure realizes stable and firm seat tube tightening through the cooperation and pushing of concealed inclined plane blocks; and the inclined plane cooperation is only controlled by tightening screws, which is convenient to operate, has high stability and is easy to replace; at the same time, the structure realizes seamless connection when connecting the upper tube, the middle tube and the seat tube through the design of the weight-reducing insertion end, thereby obtaining a bicycle product with a seamless joint with a beautiful and smooth appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional perspective schematic diagram of a seat tube connection structure of the utility model.

[0016] Figure 2 It is a side view of a preferred example of a seat tube pressing piece of a seat tube connection structure of the utility model.

[0017] Figure 3 Is set with Figure 1 A schematic diagram (partial perspective) of a bicycle of the present invention with a seat tube connection structure is shown.

[0018] Figure 4 yes Figure 2 A perspective schematic diagram of a preferred example of a seat tube clamping member is shown.

[0019] Figure 5 yes Figure 4 An exploded schematic diagram of a preferred embodiment of a seat tube clamping member is shown.

[0020] In the figure, 1, receiving cavity; 2, upper tube extension end; 3, middle tube extension end; 4, seat tube clamping piece; 5, accommodating cavity; 6, upper tube; 7, middle tube; 8, seat tube; 11, screw; 12, slider; 13, push block; 21, dust cover. DETAILED DESCRIPTION

[0021] The following is a further description of the "a seat tube connection structure and a bicycle including the same" of the present utility model in conjunction with the accompanying drawings.

[0022] See also Figure 1-5 The utility model first provides a seat tube connection structure, which comprises: a receiving cavity 1, an upper tube extension end 2, a middle tube extension end 3, an accommodating cavity 5, a seat tube pressing member 4 arranged in the accommodating cavity 5, and a dust cover 21 (optional). The seat tube joint of the structure is used to fix the upper tube 6 and the middle tube 7 of the bicycle provided by the utility model by welding after plugging, and the seat tube 8 is plugged into the structure to realize the detachable connection of the seat tube 8 of the bicycle seat.

[0023] See also Figure 1 and Figure 3In this example, the seat tube connection structure is designed to match the middle tube 6 with a teardrop-shaped cross section, the middle tube 7 with a trapezoidal cross section, and the seat tube 8 with a teardrop-shaped cross section. In fact, for different frame tubes (such as the case of only having a middle tube) and seat tube 8 shapes, the connection structure can be designed to be adjustable accordingly.

[0024] See also Figure 1 The receiving cavity 1 has a teardrop-shaped cross section and is used to receive the seat tube 8 with a teardrop-shaped cross section; and in order to adjust the height of the saddle, the receiving cavity 1 is connected to the middle tube extension end 3 so that the seat tube 8 can pass through and enter the middle tube 6. The middle tube extension end 3 and the upper tube extension end 2 are both configured as hollow tubes, and the cross-sectional shapes are respectively the same as the cross-sectional shapes of the middle tube 7 and the upper tube 6 and are slightly smaller in size, so as to achieve a certain depth of stable insertion and make subsequent welding smoother.

[0025] Furthermore, a receiving cavity 5 is provided on one side of the receiving cavity 1 (eg, one side of the upper tube extension end 3) for accommodating the seat tube pressing member 4. Figure 1-2 4-5, in this example, the screw 11 is inserted from the upper end, the upper part is provided with a slider 12, and the lower part is provided with a push block 13. In fact, the relative position and the inclined direction of the slider 12 and the push block 13 can be set in the opposite direction, and such an example also embodies the conception of the solution of the utility model.

[0026] Specifically, the screw 11 and the push block 13 have matching threads. By continuously tightening the upper screw 11, the screw 11 passes through the through hole in the slider 12 and is tightened with the thread of the threaded hole in the push block 13. During the tightening process, with the push block 13 abutting against the right side wall of the accommodating chamber 5, the screw 11 pushes the slider 12 downward and continuously moves to the left along the inclined surface (towards the seat tube 8) until the seat tube 8 is clamped / pressed through the arc surface that cooperates with the seat tube 8, and the pressed contact surface can preferably be sandblasted.

[0027] However, as mentioned above, as an alternative, if the slider 12 and the push block 13 are swapped, the screw 11 needs to have a matching thread arrangement with the corresponding threaded hole of the accommodating cavity.

[0028] The structure may further include a dust cover 21 for shielding a portion of the receiving cavity 1 , the seat tube pressing member 4 and / or the accommodating cavity 5 .

[0029] In addition, see Figure 3 The utility model also provides a bicycle including the seat tube connection structure.

[0030] It should be understood that the position indications such as "upper", "lower", "left", "right" and the like described herein are divided according to the direction of the device itself or the forward direction of the device shown in the figure. It should be understood that in the scheme of the present utility model, the position indications such as upper and lower, left and right are interchangeable and do not constitute a substantial limitation to the scheme.

[0031] The embodiments described above are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design scheme of the present invention, various modifications and improvements made to the technical scheme of the present invention by engineers and technicians in this field are all within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been recorded in the claims.

Claims

1. A seat tube connection structure, characterized in that: The seat tube connection structure comprises an extension end connected to the frame, a receiving cavity for receiving the seat tube and a seat tube pressing piece; the extension end is arranged in a hollow form and is inserted into the tube of the frame by extending during connection; the seat tube pressing piece clamps and fixes the seat tube by pushing the seat tube in the receiving cavity; the main body of the seat tube connection structure also comprises a accommodating cavity for the seat tube pressing piece, which is communicated with the receiving cavity; the seat tube pressing piece comprises a screw, a push block and a slider; wherein the screw and the push block have matching threads, and the opposing surfaces of the push block and the slider are arranged as inclined surfaces capable of relative sliding; the push block and the slider are pushed closer by tightening the screw, thereby causing the slider to move along the inclined surface toward the seat tube to push the seat tube.

2. The seat tube connection structure according to claim 1, characterized in that: The screw passes through the slider and is connected to the push block. The slider is pushed toward the push block by tightening the screw, so that the slider moves toward the seat tube along the inclined surface to push the seat tube.

3. The seat tube connection structure according to claim 1, characterized in that: The accommodating cavity has a thread matched with the screw, and the push block is pushed toward the sliding block by tightening the screw, so that the sliding block moves toward the seat tube along the inclined surface to push the seat tube.

4. The seat tube connection structure according to claim 2 or 3, characterized in that: The slider has a through hole for the screw to pass through and relatively displace; the surface of the slider facing the seat tube has a shape that matches the seat tube, and the outer surface of the seat tube and / or the surface of the slider facing the seat tube are sandblasted.

5. The seat tube connection structure according to claim 2 or 3, characterized in that: The receiving cavity is communicated with the extending end of the middle tube of the frame, so that the seat tube can pass through the seat tube connecting structure and enter the middle tube.

6. The seat tube connection structure according to claim 2 or 3, characterized in that: After the extension end is inserted into the tube of the frame, the seat tube connection structure is fixedly connected to the frame by welding.

7. The seat tube connection structure according to claim 2 or 3, characterized in that: The extension end is configured to be a hollow tube having the same cross-sectional shape as the inserted tube.

8. The seat tube connection structure according to claim 2 or 3, characterized in that: The seat tube connection structure further comprises a dust cover for shielding part of the receiving cavity, the seat tube pressing member and / or the accommodating cavity.

9. A bicycle, characterized in that: The bicycle comprises a seat tube connection structure as described in any one of claims 1-8.

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