A double longitudinal folding vehicle

Abstract

The utility model discloses a double longitudinal folding bicycle, including front car body, middle pipe, rear car body, switch lock catch, five -way pipe, rotating axle cylinder, front car body, rear car body set up respectively in the front side and rear side of middle pipe, five -way pipe set up in the front side of middle pipe bottom, rotating axle cylinder set up in the rear side of middle pipe bottom, front car body include crossbeam, car head pipe, handle, front fork pipe, front fork, front wheel, the both ends of crossbeam are connected with the lateral surface of middle pipe upper end, car head pipe middle part respectively, front fork pipe passes through car head pipe and is equipped with folder with handle, front fork connection both ends respectively, and the front fork connects the both sides of front wheel, rear car body includes left tripod, right tripod, rear wheel, left tripod, right tripod bottom edge one end is connected with each other and is connected with middle pipe through switch lock catch. The utility model can complete the folding of bicycle under the condition of keeping the integrity of crossbeam and frame, and has no influence on the overall strength of frame.

Description

Technical Field

[0001] This utility model relates to the technical field of bicycle folding frames, and in particular to a double-vertical folding bicycle. Background Technology

[0002] The top of the bicycle's bottom tube connects to the seat, and the bottom connects to the pedal axle. The frame in front of the bottom tube is called the front frame, and the frame behind the bottom tube is called the rear frame. To make it easier to carry and store the bicycle when not in use, foldable bicycles have emerged. Usually, the crossbeam in front of the bottom tube is designed to be foldable. When folded, the bicycle takes up less space. However, after the crossbeam is broken to make a foldable frame, its vertical load-bearing capacity is weakened, and the overall strength of the frame will decrease for riding the bicycle. Utility Model Content

[0003] The purpose of this invention is to optimize the existing folding bicycle structure and propose a double-vertical folding bicycle that can fold the bicycle without breaking the crossbeam and maintaining the integrity of the frame, without affecting the overall strength of the frame.

[0004] To achieve the above objectives, this utility model proposes a double-longitudinal folding bicycle, comprising a front frame, a center tube, a rear frame, a switch latch, a bottom bracket, and a rotating shaft. The front and rear frames are respectively located on the front and rear sides of the center tube. The bottom bracket is located on the front side of the bottom of the center tube, and the rotating shaft is located on the rear side of the bottom of the center tube. The front frame includes a crossbeam, a head tube, handlebars, a fork tube, a fork, and a front wheel. The two ends of the crossbeam are connected to the upper end of the center tube and the side of the middle part of the head tube, respectively. The fork tube passes through the head tube and has folding devices at both ends that connect to the handlebars and the fork. The fork connects to both sides of the front wheel. The rear frame includes a left... The bicycle comprises a frame, a right frame, and a rear wheel. The bottom edges of the left and right frames are connected to each other and connected to the center tube via a switch lock. The other ends of the bottom edges of the left and right frames are respectively located on both sides of the rotating cylinder and rotatably connected to the rotating cylinder. The vertices of the left and right frames opposite to their bottom edges are respectively connected to both sides of the rear wheel. The bottom bracket connects to the pedal assembly, and the top of the center tube connects to the bicycle seat. The rear frame rotates around the rotating cylinder and is located on one side of the crossbeam. The front fork is located on the other side of the crossbeam after the folding mechanism is opened and rotated. The handlebars are located above the front or rear wheel after the folding mechanism is opened and rotated.

[0005] In this design, the bottom tube, crossbeam, and head tube are treated as a single unit with no disassembly or folding structure. The rear frame (including the left and right triangles and the rear wheel) is rotatably connected to the aforementioned unit via a rotating axle, serving as the folding section. The fork tube passes through the head tube and is rotatably connected to it. When folded, the fork tube remains intact, but the handlebars and fork (including the front wheel), connected to the fork tube via a folding mechanism, are rotatably foldable. The folding mechanism consists of two rotatably connected parts, one connected to the fork tube and the other to the fork or handlebars. After folding, the rear frame is located on one side of the crossbeam, the fork (including the front wheel) is located on the other side of the crossbeam, and the handlebars are located above the front or rear wheel. In this design, the bottom tube, crossbeam, and head tube, as a single unit, form the main load-bearing structure. Maintaining their integrity ensures that the overall strength is not affected by folding. Although the rear frame is foldable, it is also a single unit, and its load-bearing capacity is not significantly affected during normal use. The folded bicycle is significantly shorter, making it easier to carry and store.

[0006] In a preferred embodiment of this invention, the axis of the five-way tube is perpendicular to the axis of the crossbeam's length, and the angle between the rotation axis of the folding device, the rotation axis of the rotating shaft cylinder, and the axis of the crossbeam's length is less than or greater than 90°. This design, by setting the angle between the rotation axis of the folding device, the rotation axis of the rotating shaft cylinder, and the axis of the crossbeam's length, allows the angle to be adjusted according to the vehicle model size. This ensures that the rear frame rotates and folds tilting towards one side of the crossbeam rather than towards the crossbeam's central axis, while the front wheel rotates and folds tilting towards the other side of the crossbeam. The handlebars, after rotation and folding, can be positioned above either the front or rear wheels.

[0007] In a preferred embodiment of this invention, a center tube connecting pipe is provided on the side where the center tube connects to the rear frame, and a rear frame connecting pipe is provided at the connection point between the rear frame and the center tube. The center tube connecting pipe and the rear frame connecting pipe are connected by a switch and latch. In this embodiment, the rear frame rotates around a pivot axis located at the bottom of the rear frame, while the connection point between the center tube and the rear frame is located at the top of the rear frame. The center tube connecting pipe and the rear frame connecting pipe can be sleeve-type pipes, allowing them to separate when the rear frame rotates and then be fixedly connected by a switch and latch. Although this connection strength may be somewhat affected, the impact on the overall strength of the bicycle is relatively small.

[0008] In a preferred embodiment of this utility model, the rotating shaft includes a shaft, shaft lugs, and a set of locking screws. Each of the left and right triangular brackets has a shaft lug at its rotatable connection point with the rotating shaft. The shaft is connected to the bottom of the central tube. The two shaft lugs are respectively close to both sides of the shaft and rotatably connected to the shaft via locking screws. Each locking screw includes a first connecting sleeve, a second connecting sleeve, and a fixing bolt. The first and second connecting sleeves pass through the shaft lugs from both sides and extend into the shaft. The fixing bolt passes through either the first or second connecting sleeve and is threadedly fixed to the other connecting sleeve. This embodiment utilizes a set of locking screws as a rotating shaft, with the first and second connecting sleeves rotatably connected to the shaft lugs on both sides.

[0009] In a preferred embodiment of this invention, a reinforcing tube is further provided between the central tube and the crossbeam. One end of the reinforcing tube is connected to the lower side of the central tube, and the other end is connected to the bottom of the crossbeam to form a triangular frame. The reinforcing tube in this embodiment is used to strengthen the connection between the central tube and the crossbeam. When the reinforcing tube is connected to the central tube, it can also be connected to a bottom bracket, and the three components are welded together.

[0010] In a preferred embodiment of this utility model, the middle tube includes a main middle tube and a telescopic tube, which are telescopically connected to the main middle tube. The top of the telescopic tube is connected to the seat. The main middle tube connects to the front and rear of the vehicle body, the switch latch, the bottom bracket, and the rotating shaft. The seat height is adjustable in this design. The telescopic tube and the middle tube are connected by quick-release clamps, seat post clamps, etc., allowing for easy adjustment and fixing of the telescopic tube's extension length into the middle tube, thus achieving seat height adjustment.

[0011] The beneficial effects of this utility model are that the bicycle can be folded without breaking the crossbeam and maintaining the integrity of the frame, without affecting the overall strength of the frame.

[0012] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a vehicle frame structure according to this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of a folded frame structure.

[0015] Figure 3 yes Figure 1 An exploded view of a vehicle frame structure.

[0016] Figure 4 Is adopted Figure 1 A schematic diagram of a folding bicycle frame.

[0017] Figure 5 yes Figure 4 A schematic diagram of the side view of a folding bicycle after folding.

[0018] Figure 6 yes Figure 4 A top-down view of a folding bicycle after it has been folded.

[0019] Figure 7 yes Figure 4 A schematic diagram of the folded three-dimensional structure of a folding bicycle.

[0020] In the diagram: 1-Front frame, 2-Side tube, 3-Rear frame, 4-Switch latch, 5-Bottom tube, 6-Rotating axle cylinder, 7-Crossbeam, 8-Head tube, 9-Handlebar, 10-Front fork tube, 11-Front fork, 12-Front wheel, 13-Folding mechanism, 14-Left tripod, 15-Right tripod, 16-Rear wheel, 17-Bicycle seat, 18-Side tube connecting tube, 19-Rear frame connecting tube, 20-Reinforcing tube, 21-Side tube main tube, 22-Telescopic tube, 61-Axle cylinder, 62-Axle lug, 63-First connecting sleeve, 64-Second connecting sleeve, 65-Fixing bolt. Detailed Implementation

[0021] See Figures 1-7 This utility model provides the following technical solution:

[0022] A double-longitudinal folding bicycle includes a front frame 1, a center tube 2, a rear frame 3, a switch lock 4, a bottom bracket 5, and a rotating shaft 6. The front frame 1 and rear frame 3 are respectively located on the front and rear sides of the center tube 2. The bottom bracket 5 is located on the front side of the bottom of the center tube 2, and the rotating shaft 6 is located on the rear side of the bottom of the center tube 2. The front frame 1 includes a crossbeam 7, a head tube 8, handlebars 9, a front fork tube 10, a front fork 11, and a front wheel 12. The two ends of the crossbeam 7 are respectively connected to the upper end of the center tube 2 and the side of the middle part of the head tube 8. The front fork tube 10 passes through the head tube 8 and has folding devices 13 at both ends that connect to the handlebars 9 and the front fork 11. The front fork 11 is connected to both sides of the front wheel 12. The rear frame 3 includes a left triangle 14 and a right triangle 15. 15. The rear wheel 16, the left triangle 14 and the right triangle 15 are connected at one end of their bottom edges to each other and connected to the center tube 2 through the switch latch 4. The other ends of the bottom edges of the left triangle 14 and the right triangle 15 are respectively located on both sides of the rotating cylinder 6 and are rotatably connected to the rotating cylinder 6. The vertices of the left triangle 14 and the right triangle 15 opposite to their bottom edges are respectively connected to both sides of the rear wheel 16. The bottom bracket 5 is connected to the pedal device. The top of the center tube 2 is connected to the bicycle seat 17. The rear frame 3 is located on one side of the crossbeam 7 after rotating around the rotating cylinder 6. The front fork 11 is located on the other side of the crossbeam 7 after the folding device 13 is opened and rotated. The handlebar 9 is located above the front wheel 12 or the rear wheel 16 after the folding device 13 is opened and rotated.

[0023] The axis of the five-way pipe 5 is perpendicular to the length axis of the crossbeam 7, and the angle between the rotation axis of the folder 13, the rotation axis of the rotating shaft cylinder 6, and the length axis of the crossbeam 7 is less than or greater than 90°.

[0024] The middle tube 2 is connected to the rear body 3 by a middle tube connecting pipe 18 on the side. The rear body 3 is connected to the middle tube 2 by a rear body connecting pipe 19. The middle tube connecting pipe 18 and the rear body connecting pipe 19 are connected by a switch latch 4.

[0025] The rotating shaft cylinder 6 includes a shaft cylinder 61, a shaft lug 62, and a set of male and female locking screws. A shaft lug 62 is provided at the bottom edge of the left tripod 14 and the right tripod 15 where they are rotatably connected to the rotating shaft cylinder 6. The shaft cylinder 61 is connected to the bottom of the middle tube 2. The two shaft lugs 62 are respectively close to both sides of the shaft cylinder 61 and are rotatably connected to the shaft cylinder 61 by the male and female locking screws. The male and female locking screws include a first connecting sleeve 63, a second connecting sleeve 64, and a fixing bolt 65. The first connecting sleeve 63 and the second connecting sleeve 64 pass through the shaft lug 62 from both sides and extend into the shaft cylinder 61. The fixing bolt 65 passes through the first connecting sleeve 63 or the second connecting sleeve 64 and is threadedly fixed to the other connecting sleeve.

[0026] A reinforcing tube 20 is also provided between the middle tube 2 and the crossbeam 7. One end of the reinforcing tube 20 is connected to the lower side of the middle tube 2, and the other end is connected to the bottom of the crossbeam 7 to form a tripod.

[0027] The middle tube 2 includes the middle tube main tube 21 and the telescopic tube 22. The telescopic tube 22 is telescopically connected to the middle tube main tube 21. The top of the telescopic tube 22 is connected to the seat 17. The middle tube main tube 21 is connected to the front body 1, the rear body 3, the switch latch 4, the five-way tube 5, and the rotating shaft cylinder 6.

[0028] The working process of this utility model:

[0029] The rear frame 3, including the left triangle 14, right triangle 15, and rear wheel 16, is rotatably connected to the center tube 2 via a rotating cylinder 6. The fork tube 10 passes through the head tube 8 and is rotatably connected to it. When folded, the fork tube 10 is not folded, but the handlebars 9 and the fork 11, which are connected to the fork tube 10 via a folding device 13, are rotatably foldable. After folding, the rear frame 3 is located on one side of the crossbeam 7, and the fork 11, including the front wheel 12, is located on the other side of the crossbeam 7 after folding. After folding, the handlebars 9 are located above the front wheel 12 or the rear wheel 16. The length of the bicycle is greatly reduced after folding, making it easy to carry and store.

[0030] 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.

Claims

1. A double-vertical folding bicycle, characterized in that: It includes a front body, a middle tube, a rear body, a switch latch, a bottom bracket, and a rotating shaft. The front body and the rear body are respectively located on the front and rear sides of the middle tube. The bottom bracket is located on the front side of the bottom of the middle tube, and the rotating shaft is located on the rear side of the bottom of the middle tube. The front body includes a crossbeam, a head tube, handlebars, a fork tube, a fork, and a front wheel. The two ends of the crossbeam are connected to the upper end of the center tube and the side of the middle part of the head tube, respectively. The fork tube passes through the head tube and has folding devices at both ends that are connected to the handlebars and the fork, respectively. The fork is connected to both sides of the front wheel. The rear vehicle body includes a left triangle frame, a right triangle frame, and a rear wheel. The bottom edges of the left and right triangle frames are connected to each other and connected to the central tube through a switch latch. The other ends of the bottom edges of the left and right triangle frames are respectively located on both sides of the rotating shaft and rotatably connected to the rotating shaft. The vertices of the left and right triangle frames opposite to their bottom edges are respectively connected to both sides of the rear wheel. The five-way tube connects to the pedal device, and the top of the middle tube connects to the bicycle seat; The rear frame rotates around the rotating cylinder and is located on one side of the crossbeam. The front fork is located on the other side of the crossbeam after the folding mechanism is opened and rotated. The handlebars are located above the front or rear wheel after the folding mechanism is opened and rotated.

2. The double-vertical folding cart as described in claim 1, characterized in that: The axis of the five-way pipe is perpendicular to the axis of the crossbeam's length direction, and the angle between the axis of rotation of the folding device, the axis of rotation of the rotating cylinder, and the axis of rotation of the crossbeam's length direction is less than or greater than 90°.

3. A double-vertical folding cart as described in claim 1, characterized in that: The middle tube is provided with a middle tube connecting pipe on the side where it connects to the rear vehicle body, and a rear vehicle body connecting pipe is provided at the connection point between the rear vehicle body and the middle tube. The middle tube connecting pipe and the rear vehicle body connecting pipe are connected by a switch latch.

4. A double-vertical folding bicycle as described in claim 1, characterized in that: The rotating shaft includes a shaft, a shaft lug, and a set of locking screws. The bottom edges of the left and right tripods are each provided with a shaft lug at the rotatable connection point with the rotating shaft. The shaft is connected to the bottom of the middle tube. The two shaft lugs are respectively close to both sides of the shaft and are rotatably connected to the shaft via locking screws. The locking screws include a first connecting sleeve, a second connecting sleeve, and a fixing bolt. The first and second connecting sleeves pass through the shaft lugs from both sides and extend into the shaft. The fixing bolt passes through the first or second connecting sleeve and is threadedly fixed to the other connecting sleeve.

5. A double-vertical folding bicycle as described in claim 1, characterized in that: A reinforcing tube is also provided between the central tube and the crossbeam. One end of the reinforcing tube is connected to the lower side of the central tube, and the other end is connected to the bottom of the crossbeam to form a tripod.

6. A double-vertical folding cart as described in claim 1, characterized in that: The central tube includes a central tube main and a telescopic tube. The telescopic tube is telescopically connected to the central tube main. The top of the telescopic tube is connected to the vehicle seat. The central tube main is connected to the front vehicle body, the rear vehicle body, the switch latch, the bottom bracket, and the rotating shaft cylinder.

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