Folding frame and folding bicycle

Abstract

The utility model relates to the technical field of folding bicycles, and discloses a folding bicycle frame and a folding bicycle, the folding bicycle frame comprises two cross bars, the two cross bars are arranged at intervals, the top surfaces of the cross bars are fixedly connected with a fixing frame, one side of each cross bar is fixedly connected with two first universal wheels, one side of one cross bar is fixedly connected with a pull rod, and the other side of the cross bar is fixedly connected with a second universal wheel. Wherein two second universal wheels are arranged on one side of one transverse strip, in the unfolded state, the limiting effect on the positioning strip is relieved through mutual cooperative use of a handle, a positioning rod and a reset spring, and the limiting effect on the positioning strip is relieved through mutual cooperative use of the positioning strip, a worm, a worm wheel, a two-way lead screw and a sliding block. According to the folding device, when the folding device is not folded, the two second universal wheels are reset, the two second universal wheels and the two first universal wheels are symmetrical in position, and the situation that the gravity center is unstable when the vehicle is loaded or runs on the uneven ground is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of folding car, more particularly to a folding frame and folding car. BACKGROUND

[0002] The camping folding car is a portable vehicle specially designed for camping activities, which combines the functions of bicycles and the convenience of folding, and is very suitable for use in camping scenes. The camping folding car usually adopts a light and compact frame structure and a clever folding mechanism. The frame can be quickly folded into a compact shape for easy carrying and storage.

[0003] The existing camping folding car is usually folded to achieve portability, however, in order to facilitate folding, some designs place the two wheels near the handle between the other two wheels, so that the four wheels can be closely stored together when folding. Although this design optimizes the storage volume after folding, the center of gravity of the vehicle is unevenly distributed due to the asymmetry of the wheel layout in the unfolded state. This asymmetric layout may cause the center of gravity of the vehicle to be unstable when carrying heavy loads or driving on uneven ground. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a folding frame and folding car to solve the problems existing in the above background art.

[0005] The utility model provides the following technical scheme:

[0006] A folding frame comprises two horizontal bars, the two horizontal bars are arranged at intervals, the top surface of the horizontal bar is fixedly connected with a fixing frame, one side of the horizontal bar is fixedly connected with two first universal wheels, one side of one of the horizontal bars is fixedly connected with a pull rod, one side of one of the horizontal bars is provided with two second universal wheels, the inside of the horizontal bar is provided with an adjusting component, the adjusting component is connected with a limiting component, and the adjusting component can adjust the distance between the two second universal wheels.

[0007] The adjusting component comprises a bidirectional screw rod, the bidirectional screw rod is arranged in the inside of the horizontal bar, first bearings are inlaidly installed on the two sides of the inside of the horizontal bar, the two ends of the bidirectional screw rod are fixedly connected with the inner rings of the two first bearings, two sliding blocks are slidingly connected with the inside of the horizontal bar, a sliding hole is formed in one side of the horizontal bar, and one end of the sliding block is fixedly connected with the second universal wheel through the sliding hole.

[0008] Further, the adjusting component further comprises a second bearing which is embeddedly installed on the inner bottom wall of the horizontal strip, an inner ring of the second bearing is fixedly connected with a worm, one end of the worm extends to the top of the horizontal strip, an outer wall surface of the bidirectional screw rod is fixedly connected with a worm wheel, and the worm wheel is in meshing connection with the worm.

[0009] Further, the limiting component comprises a positioning rod which is arranged on the bottom surface of the horizontal strip, one end of the positioning rod extends to the top of the horizontal strip through the horizontal strip, and an outer wall surface of the worm is fixedly connected with a positioning strip, and the inner portion of the positioning strip is movably connected with the positioning rod.

[0010] Further, the limiting component further comprises a reset spring which is fixedly connected to one end of the positioning rod, and the other end of the reset spring is fixedly connected with the bottom surface of the horizontal strip.

[0011] Further, an outer wall surface of the positioning rod is fixedly connected with a handle, and the handle is arranged below the positioning strip.

[0012] Further, two first connecting rods and two second connecting rods are rotatably connected to the sides of the two fixing frames which are close to each other, the two first connecting rods are rotatably connected with each other, the two second connecting rods are rotatably connected with each other, the two first connecting rods and the two second connecting rods are crossly rotatably connected respectively, a storage bag is arranged between the two fixing frames, and the two sides of the storage bag are fixedly connected with the fixing frames.

[0013] Further, the utility model provides a folding bicycle, including preceding folding bicycle frame.

[0014] The utility model discloses a technical effect and advantage:

[0015] In the unfolded state, through the cooperation of the handle, the positioning rod and the reset spring, the limiting effect of the positioning strip is removed, and through the cooperation of the positioning strip, the worm, the worm wheel, the bidirectional screw rod and the sliding block, the two second universal wheels and the two first universal wheels are positionally symmetrical, compared with the prior art, the two second universal wheels can be adjusted before folding, and then after folding, the two second universal wheels are located between the two first universal wheels, and the folding effect is not affected, and when not folding, the two second universal wheels are reset, and the two second universal wheels and the two first universal wheels are positionally symmetrical, so that the center of gravity is stable when the vehicle is under load or runs on uneven ground. ACCURACY OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2The utility model discloses a storage bag structure schematic view

[0018] Figure 3 The utility model discloses a Figure 2 Partial structure schematic view of A in the middle

[0019] Figure 4 The utility model discloses a horizontal strip structure schematic view

[0020] Figure 5 The utility model discloses a Figure 4 Partial structure schematic view of B in the middle

[0021] The figure mark is: 1, horizontal strip, 2, fixed frame, 3, pull rod, 4, first universal wheel, 5, first connecting rod, 6, second connecting rod, 7, storage bag, 8, handle, 9, positioning rod, 10, positioning strip, 11, worm, 12, sliding block, 13, sliding hole, 14, worm wheel, 15, bidirectional screw rod, 16, first bearing, 17, reset spring, 18, second bearing, 19, second universal wheel. Specific implementation

[0022] The utility model will be further explained in combination with specific embodiment, however, people skilled in the art should understand that the detailed explanation given in combination with the drawings here is to explain better, and the structure of the utility model is bound to exceed these limited embodiments, and for some equivalent alternative or common means, this paper will not make detailed description, but still belongs to the protection scope of the application.

[0023] Figures 1-5 It is the best embodiment of the utility model, and the following will be combined with the attached Figure 1 Figure Figure 5 The utility model will be further explained.

[0024] A folding frame, comprising: two horizontal strips 1, two horizontal strips 1 are arranged at intervals, the top surface of the horizontal strip 1 is fixedly connected with a fixed frame 2, one side of the horizontal strip 1 is fixedly connected with two first universal wheels 4, one side of one horizontal strip 1 is fixedly connected with a pull rod 3, one side of one horizontal strip 1 is provided with two second universal wheels 19, the inside of the horizontal strip 1 is provided with an adjusting component, the adjusting component is connected with a limiting component, the adjusting component can adjust the distance between the two second universal wheels 19, and the adjusting component comprises: a bidirectional screw rod 15, the bidirectional screw rod 15 is arranged in the inside of the horizontal strip 1, the inside of the horizontal strip 1 is respectively embeddedly provided with a first bearing 16 on both sides, the two ends of the bidirectional screw rod 15 are respectively fixedly connected with the inner rings of the two first bearings 16, the inside of the horizontal strip 1 is slidably connected with two sliding blocks 12, one side of the horizontal strip 1 is provided with a sliding hole 13, one end of the sliding block 12 passes through the sliding hole 13 and is fixedly connected with the second universal wheel 19.

[0025] Specifically, the adjusting component further comprises a second bearing 18, the second bearing 18 is embeddedly installed on the inner bottom wall of the horizontal strip 1, the inner ring of the second bearing 18 is fixedly connected with the worm 11, one end of the worm 11 extends to the top of the horizontal strip 1, the outer wall surface of the bidirectional screw rod 15 is fixedly connected with the worm wheel 14, and the worm wheel 14 is in meshing connection with the worm 11.

[0026] In the embodiment, by arranging the worm 11, the staff can rotate the worm 11 clockwise for ten turns, the rotation of the worm 11 drives the bidirectional screw rod 15 to rotate through the worm wheel 14, the inside of the horizontal strip 1 limits the sliding block 12, thereby limiting the sliding block 12 from rotating and converting the rotation into linear motion, at this time, the rotation of the bidirectional screw rod 15 drives the two sliding blocks 12 to drive the second universal wheels 19 to move close to each other, so that the distance between the two second universal wheels 19 is adjusted.

[0027] Specifically, the limiting component comprises a positioning rod 9, the positioning rod 9 is arranged on the bottom surface of the horizontal strip 1, one end of the positioning rod 9 penetrates through the horizontal strip 1 and extends to the top of the horizontal strip 1, the outer wall surface of the worm 11 is fixedly connected with a positioning strip 10, the inside of the positioning strip 10 is movably connected with the positioning rod 9, and the limiting component further comprises a reset spring 17, one end of the reset spring 17 is fixedly connected with the positioning rod 9, and the other end of the reset spring 17 is fixedly connected with the bottom surface of the horizontal strip 1.

[0028] In the embodiment, by arranging the reset spring 17, the potential energy of the reset spring 17 is released to drive the positioning rod 9 to reset and make one end of the positioning rod 9 enter the inside of the positioning strip 10, so that the worm 11 is limited and the rotation of the worm 11 is prevented.

[0029] Specifically, the outer wall surface of the positioning rod 9 is fixedly connected with a handle 8, and the handle 8 is located below the positioning strip 10.

[0030] In the embodiment, by arranging the handle 8, the handle 8 can facilitate the staff to better press the positioning rod 9.

[0031] Specifically, the side, where the two fixed frames 2 move close to each other, is rotatably connected with two first connecting rods 5 and two second connecting rods 6, the two first connecting rods 5 are rotatably connected with each other, the two second connecting rods 6 are rotatably connected with each other, the two first connecting rods 5 and the two second connecting rods 6 are respectively cross-rotatably connected, a storage bag 7 is arranged between the two fixed frames 2, and the two sides of the storage bag 7 are fixedly connected with the fixed frames 2 respectively.

[0032] In the embodiment, by arranging the fixed frame 2, the staff can squeeze the two fixed frames 2, at this time, the first connecting rod 5 and the second connecting rod 6 are stressed to shrink, so that the two fixed frames 2 drive the storage bag 7 to be folded together.

[0033] Specifically, the embodiment also discloses a folding vehicle.

[0034] The working principle and use process of the utility model are as follows: when in use, when folding, the staff can hold the handle 8 and press the positioning rod 9 downward, the positioning rod 9 can lengthen the reset spring 17, meanwhile, one end of the positioning rod 9 can be separated from the inside of the positioning strip 10, and then the restriction on the positioning strip 10 is released, at this time, the staff can rotate the worm 11 clockwise through the positioning strip 10 for ten turns, the rotation of the worm 11 can drive the bidirectional screw rod 15 to rotate through the worm wheel 14, since the inside of the horizontal strip 1 limits the sliding block 12, the sliding block 12 cannot rotate, and the sliding block 12 is converted from rotation into linear motion, at this time, the rotation of the bidirectional screw rod 15 can drive the two sliding blocks 12 to drive the second universal wheel 19 to move close to each other, the distance between the two second universal wheels 19 is adjusted, then the potential energy of the reset spring 17 is released to reset the positioning rod 9, and one end of the positioning rod 9 enters the inside of the positioning strip 10, the worm 11 is limited, and the rotation of the worm 11 is prevented, then the staff can squeeze the two fixing frames 2, at this time, the first connecting rod 5 and the second connecting rod 6 are stressed to shrink, and then the two fixing frames 2 drive the storage bag 7 to fold together, at this time, the two second universal wheels 19 are located between the two first universal wheels 4, and the folding effect is not affected.

[0035] When the folded storage bag 7 is unfolded, the staff can hold the handle 8 and press the positioning rod 9 downward, the positioning rod 9 can lengthen the reset spring 17, one end of the positioning rod 9 is separated from the inside of the positioning strip 10, then the worm 11 is rotated counterclockwise through the positioning strip 10 for ten turns, at this time, the worm 11 drives the bidirectional screw rod 15 to rotate through the worm wheel 14, and the bidirectional screw rod 15 drives the two sliding blocks 12 to drive the second universal wheel 19 to reset, the two second universal wheels 19 are symmetrically located with the two first universal wheels 4, then the potential energy of the reset spring 17 is released to reset the positioning rod 9, and one end of the positioning rod 9 enters the inside of the positioning strip 10, the worm 11 is limited, and the rotation of the worm 11 is prevented, compared with the prior art, the two second universal wheels 19 can be adjusted before folding, and then after folding, the two second universal wheels 19 can be located between the two first universal wheels 4, the folding effect is not affected, and when not folding, the two second universal wheels 19 are reset, the two second universal wheels 19 are symmetrically located with the two first universal wheels 4, and the situation that the center of gravity is unstable when the vehicle is under load or runs on uneven ground is prevented.

[0036] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application, and in accordance with the technical essence of the present application, still belong to the protection scope of the technical solution of the present application.

Claims

1. A folding frame, characterized in that, Include: Two horizontal bars (1), two said horizontal bars (1) are arranged at intervals, the top surface of the horizontal bar (1) is fixedly connected with a fixing frame (2), one side of the horizontal bar (1) is fixedly connected with two first universal wheels (4), one side of one of the horizontal bars (1) is fixedly connected with a pull rod (3), one side of one of the horizontal bars (1) is provided with two second universal wheels (19), the inside of the horizontal bar (1) is provided with an adjusting part, the adjusting part is connected with a limiting part, the adjusting part can adjust the distance between the two second universal wheels (19); The adjusting part comprises: a bidirectional screw rod (15), the bidirectional screw rod (15) is arranged in the inside of the horizontal bar (1), the inside of the horizontal bar (1) is respectively embedded with a first bearing (16) on both sides, the two ends of the bidirectional screw rod (15) are respectively fixedly connected with the inner rings of the two first bearings (16), the inside of the horizontal bar (1) is slidably connected with two sliding blocks (12), one side of the horizontal bar (1) is provided with a sliding hole (13), one end of the sliding block (12) penetrates through the sliding hole (13) and is fixedly connected with the second universal wheel (19).

2. The folding frame of claim 1, wherein, The adjusting part further comprises: a second bearing (18), the second bearing (18) is embeddedly installed on the inner bottom wall of the horizontal bar (1), the inner ring of the second bearing (18) is fixedly connected with a worm (11), one end of the worm (11) extends to the top of the horizontal bar (1), the outer wall surface of the bidirectional screw rod (15) is fixedly connected with a worm wheel (14), the worm wheel (14) is meshingly connected with the worm (11).

3. The folding frame of claim 2, wherein, The limiting part comprises: a positioning rod (9), the positioning rod (9) is arranged on the bottom surface of the horizontal bar (1), one end of the positioning rod (9) penetrates through the horizontal bar (1) and extends to the top of the horizontal bar (1), the outer wall surface of the worm (11) is fixedly connected with a positioning strip (10), the inside of the positioning strip (10) is movably connected with the positioning rod (9).

4. The folding frame of claim 3, wherein, The limiting part further comprises: a reset spring (17), the reset spring (17) is fixedly connected to one end of the positioning rod (9), the other end of the reset spring (17) is fixedly connected with the bottom surface of the horizontal bar (1).

5. The folding frame of claim 3, wherein, The outer wall surface of the positioning rod (9) is fixedly connected with a handle (8), the handle (8) is located below the positioning strip (10).

6. The folding frame of claim 1, wherein, Two said fixing frames (2) are rotatably connected with two first connecting rods (5) and two second connecting rods (6) on the side close to each other, two said first connecting rods (5) are rotatably connected between them, two said second connecting rods (6) are rotatably connected between them, two said first connecting rods (5) and two said second connecting rods (6) are respectively cross rotatably connected, a storage bag (7) is arranged between two fixing frames (2), the two sides of the storage bag (7) are respectively fixedly connected with the fixing frames (2).

7. A folding vehicle characterized by The folding frame of any one of claims 1-6.

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