Frame keel with rotary folding structure

Abstract

The utility model discloses a frame keel with a rotary folding structure, and relates to the technical field of trackless land vehicles. A frame keel with a rotary folding structure comprises a first frame, a first fixing seat tube, a second frame and a connecting supporting rod, the first fixing seat tube is installed on the outer wall of one end of a handlebar tube, and a seat tube clamp is installed on the outer wall of the upper end of the first fixing seat tube; fixing bolts are screwed to rotate, so that the other ends of the fixing bolts are separated from the interiors of fixing bolt grooves, then limiting fixing blocks are taken out from the interiors of limiting fixing block grooves, connecting supporting rods are screwed to rotate to drive rotating connecting blocks to rotate, and then the rotating connecting blocks can be folded to proper positions on the rotating connecting blocks in cooperation with the connecting supporting rods; and the second bicycle frame can be taken down from the first bicycle frame while the seat tube is taken out through the seat tube clamp, so that the bicycle is convenient to transport and disassemble, and the practicability and the flexibility of the bicycle are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of trackless land vehicles, in particular to a frame keel with a rotating and folding structure. Background Art

[0002] The frame keel usually refers to the main frame structure of a vehicle (especially bicycles and motorcycles). It plays a role similar to that of the human skeleton, providing support, strength and stability to the entire vehicle.

[0003] Among them, the frame keel of a bicycle is usually composed of metal pipes, joints, geometric shapes and other structures. Among them, the frame keel needs to bear the weight of the rider and various forces generated during the use of the vehicle.

[0004] As urban traffic congestion becomes increasingly serious, bicycles, as a green, environmentally friendly and healthy means of transportation, are becoming increasingly popular. However, the bicycle frame is difficult to disassemble during transportation, making it impossible to reduce the size. This increases transportation costs, especially when long-distance transportation or mailing is required, thereby reducing the practicality and flexibility of bicycles. Utility Model Content

[0005] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide a frame keel with a rotating and folding structure, which can solve the problem that the frame keel of a bicycle is difficult to disassemble during transportation, making it impossible to reduce the volume, thus increasing transportation costs, especially when long-distance transportation or mailing is required, thereby reducing the practicality and flexibility of the bicycle.

[0006] To achieve the above-mentioned object, the utility model provides the following technical solution: a frame keel with a rotating and folding structure, comprising a first frame, a second fixed seat tube, a first fixed seat tube, a second frame and a connecting support rod, wherein the second fixed seat tube is installed on the outer wall of one end of the handlebar tube, a seat tube clamp is installed on the outer wall of the upper end of the second fixed seat tube, the lower end of the first fixed seat tube is fixedly connected to the upper surface of the second frame, a rotating connecting block is rotatably connected to the outer wall of the lower end protrusion of the first frame, and the inner part of one end of the connecting support rod is rotatably connected to the outer wall of the rotating connecting block;

[0007] Among them, a limit fixing block groove is provided on the outer wall of one end of the second frame, and the internal sliding connection of the limit fixing block in the limit fixing block groove is provided, and the upper surface of the limit fixing block is fixedly connected with a fixing seat, and the inner wall of the end of the connecting support rod away from the rotating connection block is rotatably connected to the outer wall of the fixing seat, and the lower surface of the end of the second frame close to the limit fixing block is threadedly connected with a fixing bolt, and a fixing bolt groove is provided on the lower surface of the limit fixing block.

[0008] Preferably, the second frame is in a "Y" shape;

[0009] Wherein, one end of the fixing bolt close to the limiting fixing block is threadedly extended into the interior of the limiting fixing block groove and is threadedly connected with the interior of the fixing bolt groove.

[0010] Preferably, the upper end of the first fixed seat tube is mounted with a similar seat tube clamp.

[0011] Preferably, the interior of the second fixed seat tube is slidably connected to a seat tube.

[0012] Preferably, the lower end of the seat tube slides through the interior of the second fixed seat tube and is slidably connected to the interior of the first fixed seat tube.

[0013] Preferably, a handlebar tube is mounted on the outer wall of one end of the first frame away from the second fixed seat tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The frame keel with a rotating and folding structure is rotated by screwing a fixing bolt so that the other end thereof is disengaged from the inside of the fixing bolt slot, and then the limiting fixing block is taken out from the inside of the limiting fixing block slot. The rotating connecting block is driven to rotate by screwing a connecting support rod, and then the connecting support rod can be cooperated with to fold the rotating connecting block into a suitable position. Then, the seat tube can be taken out by a seat tube clamp, and the second frame can be removed from the first frame at the same time. This facilitates transportation and disassembly, and effectively improves the practicality and flexibility of the bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the exterior of the limiting fixing block of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure inside the limiting fixing block of the utility model;

[0020] Figure 4 This is a schematic structural diagram of the exterior of the second frame of the present invention.

[0021] Figure numerals: 1, first frame; 2, rotating connecting block; 3, handlebar tube; 4, limiting fixing block groove; 5, limiting fixing block; 6, fixing seat; 7, first fixing seat tube; 8, second frame; 9, connecting support rod; 10, seat tube clamp; 11, second fixing seat tube; 12, fixing bolt; 13, seat tube; 14, fixing bolt groove. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of this utility model, terms such as "greater than," "less than," and "exceed" are understood to exclude the number indicated, while terms such as "above," "below," and "within" are understood to include the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] See also Figure 1-4The utility model provides a technical solution: a frame keel with a rotating and folding structure, comprising a first frame 1, a second fixed seat tube 11, a first fixed seat tube 7, a second frame 8 and a connecting support rod 9, the second fixed seat tube 11 is installed on the outer wall of one end of the handlebar tube 3, and a seat tube clamp 10 is installed on the outer wall of the upper end of the second fixed seat tube 11. The second frame 8 is "Y"-shaped, and the lower end of the first fixed seat tube 7 is fixedly connected to the upper surface of the second frame 8. The outer wall of the lower end protrusion of the first frame 1 is rotatably connected to a rotating connecting block 2, and the inner part of one end of the connecting support rod 9 is rotatably connected to the outer wall of the rotating connecting block 2. Dynamic connection, the outer wall of one end of the second frame 8 is provided with a limited fixing block groove 4, the internal sliding connection of the limited fixing block groove 4 is connected to the limited fixing block 5, the upper surface of the limited fixing block 5 is fixedly connected with the fixing seat 6, the inner wall of the end of the connecting support rod 9 away from the rotating connection block 2 is rotatably connected to the outer wall of the fixing seat 6, the lower surface of the end of the second frame 8 close to the limited fixing block 5 is threadedly connected with a fixing bolt 12, and the lower surface of the limited fixing block 5 is provided with a fixing bolt groove 14, and the fixing bolt 12 is threadedly extended to the inside of the limited fixing block groove 4 at one end close to the limited fixing block 5 and is threadedly connected with the internal thread of the fixing bolt groove 14.

[0027] Among them, the same seat tube clamp 10 is installed on the upper end of the first fixed seat tube 7, the seat tube 13 is slidably connected to the interior of the second fixed seat tube 11, the lower end of the seat tube 13 slides through the interior of the second fixed seat tube 11 and is slidably connected to the interior of the first fixed seat tube 7, and the handlebar tube 3 is installed on the outer wall of the end of the first frame 1 away from the second fixed seat tube 11.

[0028] By turning the fixing bolt 12 to rotate it so that the other end is out of contact with the inside of the fixing bolt groove 14, the limiting fixing block 5 is then taken out from the inside of the limiting fixing block groove 4, and the connecting support rod 9 is turned to drive the rotating connecting block 2 to rotate. After that, the connecting support rod 9 can be used to fold it into a suitable position on the rotating connecting block 2, and then the seat tube 13 can be taken out through the seat tube clamp 10, and the second frame 8 can be removed from the first frame 1 at the same time, which facilitates transportation and disassembly, and effectively improves the practicality and flexibility of the bicycle.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A frame keel with a rotating and folding structure, comprising a first frame (1), a second fixed seat tube (11), a first fixed seat tube (7), a second frame (8) and a connecting support rod (9), characterized in that: The second fixed seat tube (11) is installed on the outer wall of one end of the handlebar tube (3), and a seat tube clamp (10) is installed on the outer wall of the upper end of the second fixed seat tube (11). The lower end of the first fixed seat tube (7) is fixedly connected to the upper surface of the second frame (8). The outer wall of the lower end protrusion of the first frame (1) is rotatably connected to the rotating connection block (2), and the inner part of one end of the connecting support rod (9) is rotatably connected to the outer wall of the rotating connection block (2). A limiting fixing block groove (4) is provided on the outer wall of one end of the second vehicle frame (8), the limiting fixing block groove (4) is slidably connected to the limiting fixing block (5), the upper surface of the limiting fixing block (5) is fixedly connected to the fixing seat (6), the inner wall of one end of the connecting support rod (9) away from the rotating connection block (2) is rotatably connected to the outer wall of the fixing seat (6), the lower surface of one end of the second vehicle frame (8) close to the limiting fixing block (5) is threadedly connected to a fixing bolt (12), and the lower surface of the limiting fixing block (5) is provided with a fixing bolt groove (14).

2. The frame keel with a rotating and folding structure according to claim 1, characterized in that: The second frame (8) is in a "Y" shape; One end of the fixing bolt (12) close to the limiting fixing block (5) is threadedly extended into the interior of the limiting fixing block slot (4) and is threadedly connected to the interior of the fixing bolt slot (14).

3. The frame keel with a rotating and folding structure according to claim 1, characterized in that: The upper end of the first fixed seat tube (7) is provided with a similar seat tube clamp (10).

4. The frame keel with a rotating and folding structure according to claim 1, characterized in that: The interior of the second fixed seat tube (11) is slidably connected with a seat tube (13).

5. The frame keel with a rotating and folding structure according to claim 4, characterized in that: The lower end of the seat tube (13) slides through the interior of the second fixed seat tube (11) and is slidably connected to the interior of the first fixed seat tube (7).

6. The frame keel with a rotating and folding structure according to claim 1, characterized in that: A handlebar tube (3) is mounted on the outer wall of one end of the first frame (1) away from the second fixed seat tube (11).

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