Full triangle front and rear telescopic frame

Abstract

The utility model discloses a full triangle front and rear telescopic frame, including head tube, front crossbeam, rear crossbeam, rear upper fork, middle pipe, rear lower fork, rear insert piece, five -way connecting piece, reinforcing pipe, lock ring buckle, one end of front crossbeam is connected with head tube, and the other end is connected with rear crossbeam through lock ring buckle, and the rear crossbeam is equipped with up and down cut ditch with front crossbeam connection end port, and lock ring buckle sleeve joint is in rear crossbeam front port and is engaged with up and down cut ditch, and lock ring buckle is provided with lock handle and lock ring, the other port of rear crossbeam is connected with middle pipe, and five -way connecting piece is also connected with rear lower fork front end, and the rear end of rear upper fork, the rear end of rear lower fork is connected with rear insert piece, and rear lower fork front end is also connected with the lower surface both sides of middle pipe each other. The utility model solves the problem that the riding grip distance of traditional frame cannot adjust length, through setting telescopic crossbeam, can satisfy the person of different height arm length adjustment riding car tap to the grip distance between seat pad, also is convenient to fold small car.

Description

Technical Field

[0001] This utility model relates to the technical field of bicycle frames, and in particular to a full-triangle telescopic frame. Background Technology

[0002] The frame, as the skeleton of the entire bicycle, determines and influences the correctness and comfort of the riding posture to the greatest extent. The frame components are the basic structural body of the bicycle, as well as its skeleton and main body. Other components are also directly or indirectly mounted on the frame. Traditional bicycle frames do not allow for adjustment of the grip length. Utility Model Content

[0003] The purpose of this invention is to optimize the existing folding bicycle frame structure and propose a full triangular front and rear telescopic frame to solve the problem that the grip distance of traditional frames cannot be adjusted. By setting a telescopic crossbeam, it can meet the needs of people of different heights and arm lengths to adjust the grip distance between the handlebars and the seat. It also makes it easier to fold the bicycle smaller. The front crossbeam is thinner than the rear crossbeam, which makes the telescopic distance longer, the overlap distance between the front and rear crossbeams longer, the load-bearing strength higher, and the overall practicality of the device better.

[0004] To achieve the above objectives, this utility model proposes a full triangular telescopic frame, including a head tube, a front crossbeam, a rear crossbeam, a rear upper fork, a center tube, a rear lower fork, a rear insert, a bottom bracket connector, a reinforcing tube, and a locking ring. One end of the front crossbeam is connected to the head tube, and the other end is telescopically connected to the rear crossbeam via the locking ring. The rear crossbeam has upper and lower grooves at the connection end with the front crossbeam. The locking ring is sleeved on the front end of the rear crossbeam and engages with the upper and lower grooves. The locking ring is provided with a locking handle and a locking ring. The other end of the rear crossbeam is connected to the center tube. The upper part of the outer wall of the center tube is connected to the front end of the rear upper fork. The lower part of the outer wall of the center tube is connected to the bottom bracket connector. The lower end face of the rear crossbeam is connected to the bottom bracket connector via the reinforcing tube. The bottom bracket connector is also connected to the front end of the rear lower fork. The rear ends of the rear upper fork and the rear lower fork are connected to the rear insert, and the front ends of the rear lower fork are also connected to both sides of the lower surface of the center tube.

[0005] In this design, the front and rear crossbeams are hollow tubes with telescopic connections. Specifically, the front crossbeam can extend into the rear crossbeam, or vice versa. The connection between the front and rear crossbeams is secured by a locking ring. The locking ring has a handle and a ring. The ring is fitted onto the outside of the front or rear crossbeam (located on the outside of the outer crossbeam) and has a notch and a connecting seat. The handle connects to the ring and has a corresponding fixing seat. The connecting seat has a through hole, and the fixing seat has a threaded hole. A locking bolt passes through the threaded hole to lock the ring and handle, and thus lock the front and rear crossbeams. The locking ring can engage with the rear crossbeam through upper and lower grooves to prevent rotation. The rear crossbeam can also be reinforced by forming a triangular structure with a central tube and reinforcing tubes.

[0006] In a preferred embodiment of this invention, the diameter of the rear crossbeam is larger than that of the front crossbeam, and the inner wall of the rear crossbeam is fitted with a smaller diameter front crossbeam, with the connection being a sliding connection. The sliding connection between the front and rear crossbeams in this embodiment can be limited by providing sliding grooves and sliding rails on the front and rear crossbeams, which can effectively prevent rotation between the front and rear crossbeams.

[0007] In a preferred embodiment of this utility model, the rear crossbeam is provided with an inner tube and an outer tube. One end of the inner tube is connected to the middle tube, and the other end of the inner tube extends into the outer tube and overlaps with it. The inner and outer tubes are respectively provided with concave-convex sliding grooves that mutually limit each other. The reinforcing tube connects the bottom bracket and the inner tube. In this embodiment, the rear crossbeam is sleeved with the front crossbeam. If the diameter is too large, the fit between the rear crossbeam and the middle tube will be difficult. Therefore, the rear crossbeam can be divided into a smaller diameter inner tube and a larger diameter outer tube. The inner tube extends into the outer tube and overlaps with it for fixed connection, for example, by using concave-convex sliding grooves for mutual limiting and welding. The inner tube is welded to the middle tube, and the reinforcing tube is welded to the outer tube. Thus, the outer tube, inner tube, middle tube, and reinforcing tube still form a triangular structure.

[0008] In a preferred embodiment of this invention, a thin tube is provided at the rear end of the rear crossbeam. This thin tube is connected to the middle tube and the reinforcing tube to form a full triangular structure. The diameter of the thin tube in this embodiment is smaller than the diameter of the rear crossbeam, allowing it to be connected and fixed to the middle tube and the reinforcing tube to form a full triangular structure.

[0009] In a preferred embodiment of this invention, one end of the rear insert is connected to the outer wall of the rear upper fork, and the other end of the rear insert is connected to the outer wall of the rear lower fork. The bottom bracket connector is located on one side of the center tube. In this design, the rear upper fork, center tube, rear lower fork, rear insert, and bottom bracket connector are interconnected, forming multiple triangular structures that stabilize the strength and rigidity of the rear frame.

[0010] The beneficial effects of this utility model are as follows: After the locking handle on the locking ring is opened, the locking ring releases the locking force on the front end of the rear crossbeam. Then, the front crossbeam slides on the inner wall of the rear crossbeam, making the overall length of the front crossbeam and the rear frame thinner and longer. When the front crossbeam is stretched to the appropriate position, the locking handle is then applied in the opposite direction to lock it in place, so that the locking ring applies a locking force to the front end of the rear crossbeam. Then, the locking ring is fixed to the front crossbeam end, so that the length of the frame can be adjusted according to the rider's arm length. The overall practicality of the device is better, which helps to solve the problem that the grip distance of traditional frames cannot be adjusted. With this telescopic crossbeam, people of different heights and arm lengths can adjust the grip distance between the handlebars and the seat. The design of the front crossbeam being thinner than the rear crossbeam makes the telescopic distance longer, the overlap distance between the front and rear crossbeams longer, and the load-bearing strength higher, making the overall practicality of the device better.

[0011] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a side view of the structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the connection structure of the front crossbeam extending into the rear crossbeam of this utility model.

[0015] In the diagram: 1-Head tube, 2-Front crossbeam, 3-Rear crossbeam, 4-Rear upper fork, 5-Side tube, 6-Rear lower fork, 7-Rear insert, 8-Bottom connector, 9-Reinforcing tube, 10-Lock ring buckle, 11-Lock handle, 12-Lock ring, 13-Upper and lower grooves, 31-Thin tube. Detailed Implementation

[0016] See Figures 1-3 This utility model provides the following technical solution: A full triangular telescopic frame includes a head tube 1, a front crossbeam 2, a rear crossbeam 3, a rear seat fork 4, a bottom tube 5, a rear chain fork 6, a rear slat 7, a bottom bracket connector 8, a reinforcing tube 9, and a locking ring 10. One end of the front crossbeam 2 is connected to the head tube 1, and the other end is connected to the rear crossbeam 3 via the locking ring 10. The end of the rear crossbeam 3 connected to the front crossbeam 2 has upper and lower grooves 13. The locking ring 10 is sleeved on the front end of the rear crossbeam 3 and engages with the upper and lower grooves 13. The 10 is equipped with a lock handle 11 and a lock ring 12; the other end of the rear crossbeam 3 is connected to the middle tube 5, the upper part of the outer wall of the middle tube 5 is connected to the front end of the rear upper fork 4, the lower part of the outer wall of the middle tube 5 is connected to the bottom bracket connector 8, the lower end face of the rear crossbeam 3 is connected to the bottom bracket connector 8 through the reinforcing tube 9, the bottom bracket connector 8 is also connected to the front end of the rear lower fork 6, the rear end of the rear upper fork 4 and the rear end of the rear lower fork 6 are connected to the rear insert 7, and the front end of the rear lower fork 6 is also connected to both sides of the lower surface of the middle tube 5.

[0017] The diameter of the rear crossbeam 3 is larger than that of the front crossbeam 2. The inner wall of the port of the rear crossbeam 3 is fitted with the front crossbeam 2 with a smaller diameter and the connection method is a sliding connection.

[0018] The rear crossbeam 3 is provided with an inner tube and an outer tube. One end of the inner tube is connected to the middle tube 5, and the other end of the inner tube extends into the outer tube and overlaps with it. The inner tube and the outer tube are respectively provided with concave and convex sliding grooves to limit each other. The reinforcing tube 9 is connected to the five-way connector 8 and the inner tube.

[0019] A thin tube 31 is installed at the rear end of the rear crossbeam 3. The thin tube 31 is connected to the middle tube 5 and the reinforcing tube 9 to form a full triangular structure.

[0020] One end of the rear insert 7 is connected to the outer wall of the upper rear fork 4, and the other end of the rear insert 7 is connected to the outer wall of the lower rear fork 6. The bottom bracket connector 8 is located on one side of the center tube 5.

[0021] The working process of this utility model: When the new folding bicycle frame crossbeam structure designed in this scheme is in operation, an upper and lower groove 13 is provided at the front end of the rear crossbeam 3. The locking ring 10 is sleeved on the front end of the rear crossbeam 3 and engages with the upper and lower groove 13. With the front crossbeam 2 sleeved at the end of the rear crossbeam 3, it is only necessary to open the locking handle 11 on the locking ring 10. The rear crossbeam 3 is a thick tube, and the inner wall of its thick tube end is sleeved with a thinner diameter front crossbeam in a sliding connection. The front crossbeam 2 is a thin tube, and the outer wall of its thin tube end is sleeved with a thicker diameter rear crossbeam 3 in a sliding connection. Under the action of this, the locking ring 12 will be released from its locking force. Then the front crossbeam 2 will slide on the inner wall of the rear crossbeam 3, so that the front crossbeam 2 and the rear crossbeam 3 are connected. The overall length of beam 3 is relatively thin and extended. When the front crossbeam 2 is stretched to the appropriate position, the locking handle 11 is then applied in the opposite direction to engage, so that the locking ring applies a locking force to the front end of the rear crossbeam. Then, the locking ring buckle 10 fixes the front crossbeam 2, so that the length of the frame can be adjusted according to the rider's thin arm length. The overall practicality of the device is better, which helps to solve the problem that the grip distance of traditional frames cannot be adjusted. With this telescopic crossbeam, people of different heights and arm lengths can adjust the grip distance between the handlebars and the seat. The design of the front crossbeam being thinner than the rear crossbeam results in a longer telescopic distance, a longer overlap distance between the front and rear crossbeams, and higher load-bearing strength, making the overall practicality of the device better.

[0022] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

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