Secondary folding four-wheeler

Abstract

The utility model provides a secondary folding four-wheeler. The secondary folding four-wheeler comprises a foldable upper frame and two lower frames, the lower vehicle frame is arranged on the two sides of the foldable upper vehicle frame, rotary locking buckles are rotationally arranged on the two sides of the foldable upper vehicle frame, locking pull buckles are rotationally arranged on the lower vehicle frame, and limiting through grooves are formed in the locking pull buckles; when the secondary folding four-wheeler is in a folding state, the left side and the right side of the foldable upper frame are mutually folded, and the foldable upper frame and the lower frame are mutually folded; when the secondary folding four-wheeler is in a using state, the rotary locking buckle is arranged in the limiting through groove in a penetrating mode, and the locking pull buckle is limited on the foldable upper frame. According to the secondary folding four-wheeler, the foldable upper frame can be folded towards the lower frame, further folding is achieved, locking and fixing can be achieved through matching of the locking pull buckle and the rotary locking buckle in the using state, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical rehabilitation equipment, in particular to a secondary folding four-wheel vehicle. Background Art

[0002] A four-wheeled vehicle is a medical rehabilitation device for assisting the elderly, the infirm or the mobility-impaired (hereinafter referred to as the special population) to walk. The frames of the four-wheeled vehicles currently on the market can usually be folded left and right to meet the demand for reducing the packaging volume.

[0003] The frame of the current foldable four-wheeled vehicle is not stably fixed and locked after being unfolded, resulting in an unstable structure that is easily loosened, posing risks to users when using it. Utility Model Content

[0004] The utility model aims to overcome the shortcomings and deficiencies in the prior art and provide a secondary folding four-wheel vehicle.

[0005] One embodiment of the utility model provides a secondary folding four-wheel vehicle, comprising: a foldable upper frame and two lower frames;

[0006] The lower frame is arranged on both sides of the foldable upper frame and is rotatably connected to the foldable upper frame. Rotational locking buckles are rotatably arranged on both sides of the foldable upper frame. A locking buckle is rotatably arranged on the lower frame. A limited position through slot is arranged on the locking buckle.

[0007] When the secondary folding four-wheel vehicle is in a folded state, the left and right sides of the foldable upper frame are folded with each other, and the foldable upper frame is rotated toward the lower frame until the foldable upper frame and the lower frame are folded with each other;

[0008] When the secondary foldable four-wheeled vehicle is in use, the rotary locking buckle is inserted into the limiting through slot and restricts the locking buckle to the foldable upper frame.

[0009] In some optional embodiments, a right cross tube mechanism is provided on the foldable upper frame, and when the secondary folding four-wheel vehicle is in a folded state, the foldable upper frame rotates toward the lower frame so that the right cross tube mechanism faces downward.

[0010] In some optional embodiments, protruding limiting buckles are provided on opposite sides of the rotary locking buckle, and when the rotary locking buckle is inserted into the limiting through slot, the limiting buckle limits the locking buckle on the foldable upper frame.

[0011] In some optional embodiments, the locking buckle is provided with a groove which is positioned and matched with the limiting buckle portion.

[0012] In some optional embodiments, a cam portion is provided on the locking buckle, and when the secondary folding four-wheel vehicle is in use, the cam portion is pressed tightly against the lower frame to limit the rotation of the locking buckle.

[0013] In some optional embodiments, the foldable upper frame is rotatably matched with the lower frame via a connecting seat.

[0014] In some optional embodiments, a first limiting groove is provided on the connecting seat, and when the secondary folding four-wheeled vehicle is in use, the lower frame extends into the first limiting groove and cooperates with the first limiting groove.

[0015] In some optional embodiments, a second limiting groove is provided on the connecting seat, and when the secondary folding four-wheeled vehicle is in a folded state, the lower frame extends into the second limiting groove and cooperates with the second limiting groove.

[0016] In some optional embodiments, a positioning groove is provided on the connecting seat, a positioning column is provided on the lower frame, the locking buckle is rotationally matched with the positioning column, and when the secondary folding four-wheeled vehicle is in use, the positioning column is positioned and matched with the positioning groove.

[0017] In some optional embodiments, the foldable upper frame includes a left frame and a right frame, the left frame and the right frame are connected via a left cross tube mechanism, and the left frame and the right frame are rotatably connected to the two lower frames respectively.

[0018] Compared with the prior art, the secondary folding four-wheeled vehicle of the utility model can fold the foldable upper frame toward the lower frame to achieve further folding. When in use, it can be locked and fixed by the cooperation of the locking lever and the rotating locking buckle. It has a simple structure and is easy to operate.

[0019] In order to more clearly understand the present invention, the specific implementation of the present invention will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a double-folding four-wheel vehicle according to an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a secondary folding four-wheel vehicle according to an embodiment of the utility model when the secondary folding four-wheel vehicle is in a folded state;

[0022] Figure 3 for Figure 1 An enlarged view of A is shown.

[0023] Description of reference numerals:

[0024] 10. Foldable upper frame; 11. Rotating locking buckle; 111. Limiting buckle part; 12. Right cross tube mechanism; 13. Connecting seat; 14. First limiting groove; 15. Second limiting groove; 16. Positioning groove; 17. Left frame; 18. Right frame; 19. Left cross tube mechanism; 20. Lower frame; 21. Locking buckle; 211. Groove; 22. Limiting through groove; 23. Cam part; 24. Positioning column. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Figure 1 An embodiment of the utility model provides a secondary folding four-wheel vehicle, comprising: a foldable upper frame 10 and two lower frames 20.

[0026] See also Figure 2 and Figure 3 The foldable upper frame 10 is provided with structures such as handrails and brake handles, and the lower frame 20 is provided with multiple running wheels and a brake structure, and the brake structure is connected to the brake handle. The lower frame 20 is arranged on both sides of the foldable upper frame 10 and is rotatably connected to the foldable upper frame 10. The foldable upper frame 10 is rotatably provided with a rotating locking buckle 11 on both sides, and the lower frame 20 is rotatably provided with a locking pull buckle 21, and the locking pull buckle 21 is provided with a limited position through groove 22.

[0027] When the secondary folding four-wheel vehicle is in a folded state, the left and right sides of the foldable upper frame 10 are folded with each other, and the foldable upper frame 10 is rotated toward the lower frame 20 until the foldable upper frame 10 and the lower frame 20 are folded with each other, and the foldable upper frame 10 itself can be folded once, and the foldable upper frame 10 is folded toward the lower frame 20 to achieve secondary folding.

[0028] When the secondary folding four-wheel vehicle is in use, the locking buckle 21 is rotated toward the foldable upper frame 10, so that the rotating locking buckle 11 passes through the limiting groove 22, and then the rotating locking buckle 11 is twisted to lock the locking buckle 21, thereby restricting the locking buckle 21 to the foldable upper frame 10. When in use, the locking buckle 21 and the rotating locking buckle 11 can cooperate to achieve locking and fixing, which has a simple structure and is easy to operate.

[0029] In some optional embodiments, the foldable upper frame 10 is provided with a right cross tube mechanism 12. When the secondary foldable four-wheel vehicle is in the folded state, the foldable upper frame 10 rotates toward the lower frame 20 so that the right cross tube mechanism 12 faces downward. The right cross tube mechanism 12 can also provide certain support in the folded state to improve the placement stability. In some optional embodiments, the right cross tube mechanism 12 includes a plurality of handrail support tubes provided on the foldable upper frame 10.

[0030] In some optional embodiments, protruding limit buckle portions 111 are provided on opposite sides of the rotary locking buckle 11. When the rotary locking buckle 11 is inserted into the limit slot 22, the limit buckle portion 111 limits the locking lever buckle 21 on the foldable upper frame 10. When the rotary locking buckle 11 is disengaged from the limit slot 22, the rotary locking buckle 11 is twisted so that the limit buckle portion 111 moves to the position of the limit slot 22 accordingly, thereby allowing the locking lever buckle 21 to rotate to separate the rotary locking buckle 11 and the locking lever buckle 21 from each other.

[0031] In some optional embodiments, the locking buckle 21 is provided with a groove 211 which is positioned and matched with the limiting buckle 111, so that when the rotating locking buckle 11 locks the locking buckle 21, the rotating locking buckle 11 will not rotate relative to the locking buckle 21, thereby improving the locking stability.

[0032] In some optional embodiments, a cam portion 23 is provided on the locking buckle 21. When the secondary folding four-wheel vehicle is in use, the cam portion 23 is pressed tightly against the lower frame 20 to limit the rotation of the locking buckle 21. Since the cam portion 23 is tightly pressed against the lower frame 20, it is difficult for the locking buckle 21 to rotate.

[0033] In some optional embodiments, the foldable upper frame 10 is rotatably matched with the lower frame 20 via the connecting seat 13, thereby improving the structural stability.

[0034] In some optional embodiments, a first limiting groove 14 is provided on the connecting seat 13. When the secondary folding four-wheel vehicle is in use, the lower frame 20 extends into the first limiting groove 14 and cooperates with the first limiting groove 14 to limit the position, so that the structure between the lower frame 20 and the foldable upper frame 10 is more stable and less likely to shake when in use.

[0035] In some optional embodiments, a second limiting groove 15 is provided on the connecting seat 13. When the secondary folding four-wheel vehicle is in a folded state, the lower frame 20 extends into the second limiting groove 15 and cooperates with the second limiting groove 15 to limit the position, so that the structure between the lower frame 20 and the foldable upper frame 10 is more stable and less likely to shake in the folded state.

[0036] In some optional embodiments, a positioning groove 16 is provided on the connecting seat 13, a positioning column is provided on the lower frame 20, and the locking buckle 21 is rotatably matched with the positioning column. When the secondary folding four-wheel vehicle is in use, the positioning column is positioned and matched with the positioning groove 16, so that the position of the lower frame 20 near the locking buckle 21 is not easy to shake relative to the foldable upper frame 10, thereby improving the stability between the locking buckle 21 and the rotating locking buckle 11.

[0037] The structure of the foldable upper frame 10 can be designed according to actual conditions. In some optional embodiments, the foldable upper frame 10 includes a left frame 17 and a right frame 18, and the left frame 17 and the right frame 18 are connected by a left cross tube mechanism 19. The left frame 17 and the right frame 18 are rotatably connected to the two lower frames 20 through the connecting seat 13. In this embodiment, the left cross tube mechanism 19 includes a plurality of rotating rods, and the two ends of the rotating rods are rotatably connected to the left frame 17 and the right frame 18 respectively. The plurality of rotating rods are rotatably matched with each other. By relatively rotating the plurality of rotating rods, the left frame 17 and the right frame 18 can be relatively close to or away from each other, thereby realizing the folding of the foldable upper frame 10.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-fold four-wheel vehicle, characterized in that: include: Foldable upper frame and two lower frames; The lower frame is arranged on both sides of the foldable upper frame and is rotatably connected to the foldable upper frame. Rotational locking buckles are rotatably arranged on both sides of the foldable upper frame. A locking buckle is rotatably arranged on the lower frame. A limited position through slot is arranged on the locking buckle. When the secondary folding four-wheel vehicle is in a folded state, the left and right sides of the foldable upper frame are folded with each other, and the foldable upper frame is rotated toward the lower frame until the foldable upper frame and the lower frame are folded with each other; When the secondary foldable four-wheeled vehicle is in use, the rotary locking buckle is inserted into the limiting through slot and restricts the locking buckle to the foldable upper frame.

2. A two-fold four-wheel vehicle according to claim 1, characterized in that: The foldable upper frame is provided with a right cross tube mechanism. When the secondary folding four-wheel vehicle is in a folded state, the foldable upper frame rotates toward the lower frame so that the right cross tube mechanism faces downward.

3. A two-fold four-wheel vehicle according to claim 1, characterized in that: The opposite sides of the rotary locking buckle are provided with protruding limiting buckle parts. When the rotary locking buckle is inserted into the limiting through slot, the limiting buckle parts limit the locking buckle on the foldable upper frame.

4. A two-fold four-wheel vehicle according to claim 3, characterized in that: The locking buckle is provided with a groove which is positioned and matched with the limiting buckle part.

5. The double-folding four-wheel vehicle according to claim 1, characterized in that: The locking buckle is provided with a cam portion, and when the secondary folding four-wheel vehicle is in use, the cam portion is pressed tightly against the lower frame to limit the rotation of the locking buckle.

6. A twice-foldable four-wheeled vehicle according to any one of claims 1 to 5, characterized in that: The foldable upper frame is rotatably matched with the lower frame via a connecting seat.

7. A two-foldable four-wheel vehicle according to claim 6, characterized in that: The connecting seat is provided with a first limiting groove. When the secondary folding four-wheeled vehicle is in use, the lower frame extends into the first limiting groove and cooperates with the first limiting groove.

8. The double-folding four-wheel vehicle according to claim 6, characterized in that: The connecting seat is provided with a second limiting groove, and when the secondary folding four-wheeled vehicle is in a folded state, the lower frame extends into the second limiting groove and cooperates with the second limiting groove in a limiting manner.

9. The double-foldable four-wheel vehicle according to claim 6, characterized in that: The connecting seat is provided with a positioning groove, the lower frame is provided with a positioning column, the locking buckle is rotationally matched with the positioning column, and when the secondary folding four-wheel vehicle is in use, the positioning column is positioned and matched with the positioning groove.

10. A twice-foldable four-wheeled vehicle according to any one of claims 1 to 5, characterized in that: The foldable upper frame comprises a left frame and a right frame, wherein the left frame and the right frame are connected via a left cross tube mechanism, and the left frame and the right frame are rotatably connected to the two lower frames respectively.

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