Wheelchair folding structure

Abstract

The utility model relates to a wheelchair folding structure which comprises a first wheelchair side frame and a second wheelchair side frame which are parallel to each other, a first connecting rod and a second connecting rod which are parallel to each other are arranged between the first wheelchair side frame and the second wheelchair side frame, one end of the first connecting rod is rotatably connected with the bottom side of the first wheelchair side frame, and the other end of the first connecting rod is rotatably connected with the bottom side of the second wheelchair side frame. A first U-shaped rod which can rotate up and down and is rotationally connected with the top side of the second wheelchair side frame is arranged at the other end of the first connecting rod, one end of the second connecting rod is rotationally connected with the bottom side of the second wheelchair side frame, and a second U-shaped rod which can rotate up and down and is rotationally connected with the top side of the first wheelchair side frame is arranged at the other end of the second connecting rod; and the first connecting rod is rotationally connected with the second connecting rod. The foldable wheelchair has the advantages that the height needed when the wheelchair is folded is reduced, the needed containing space is reduced, the packaging cost is reduced, and the running stability and comfort are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair folding structure and belongs to the wheelchair folding technical field. BACKGROUND

[0002] The folding wheelchair is a walking aid for special groups such as the disabled, the elderly, the weak, and medical clinical rehabilitation patients, etc. Because it can be folded, it is convenient to carry and occupies less space, and thus is widely used.

[0003] A wheelchair is disclosed in Chinese patent application CN107693236A, which has a pair of link rods that are linked in a manner that allows them to rotate freely about a rotating shaft and are crossed to form an X-shaped link. The link rod has a rod middle part with a rotating shaft, and a rod upper part and a rod lower part that are bent in different directions from the first and second bending parts at the two end positions of the rod middle part. In the folded state of the X-shaped link, the rod middle parts overlap each other in a vertical position and in a straight line, and frame arrangement areas for arranging middle frames are formed on both sides of the rod middle parts in the vertical position and in the area between the rod upper part and the rod lower part bent relative to the rod middle part.

[0004] The folding wheelchair in the prior art described above shrinks the width of the wheelchair through an X-shaped structure. After the overall folding of the wheelchair is completed, the height of the X-shaped structure increases, which results in an increase in the overall structure of the wheelchair. Under the same specifications of the vehicle body, the overall height of the wheelchair is higher, and the packaging size is also larger, thereby increasing the required storage space and the packaging cost. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a wheelchair folding structure that solves the problems of increasing the required storage space and the packaging cost in the prior art.

[0006] The utility model discloses a technical purpose above mainly is solved through following technical scheme: a wheelchair folding structure, including mutually parallel first wheelchair side frame and second wheelchair side frame, be equipped with two mutually parallel first connecting rod and second connecting rod between first wheelchair side frame and second wheelchair side frame, first connecting rod one end is connected with first wheelchair side frame bottom side swing joint, first connecting rod other end is equipped with the first U type rod of up and down swing joint and with second wheelchair side frame top side swing joint, second connecting rod one end is connected with second wheelchair side frame bottom side swing joint, second connecting rod other end is equipped with the second U type rod of up and down swing joint and with first wheelchair side frame top side swing joint, first connecting rod and second connecting rod between swing joint, first wheelchair side frame and second wheelchair side frame are connected with first connecting rod and second connecting rod respectively, and the swing joint between first connecting rod and second connecting rod forms the scissor structure, and first connecting rod and second connecting rod one end are swing joint with first U type rod and second U type rod respectively, so that first connecting rod and second connecting rod can be connected with first U type rod and second U type rod and realize the folding of wheelchair to scissor structure, and when folding, first U type rod and second U type rod and first connecting rod and second connecting rod between each other fold, thereby shorten the height of scissor structure when folding, in turn reduce the required height when wheelchair folding, make the required storage space reduce, and reduce packing cost, and improve the stability, the comfort of driving.

[0007] As preferred, the midpoint of the total length of the first connecting rod and the first U-shaped rod is connected with the midpoint of the total length of the second connecting rod and the second U-shaped rod through a rotating shaft; the arrangement that the midpoint of the total length of the first connecting rod and the first U-shaped rod is connected with the midpoint of the total length of the second connecting rod and the second U-shaped rod through a rotating shaft makes the rotating centers of the first connecting rod and the first U-shaped rod after being connected and the second connecting rod and the second U-shaped rod after being connected be in a central position, so that the connection structure of the first connecting rod and the first U-shaped rod and the connection structure of the second connecting rod and the second U-shaped rod can perform stable and reliable folding actions, and the first U-shaped rod and the second U-shaped rod can be smoothly flipped when being folded.

[0008] As preferred, the opening of the first U-shaped rod and the opening of the second U-shaped rod are both arranged downward, the end of the first connecting rod is connected to the inner side of the first U-shaped rod, and the end of the second connecting rod is connected to the inner side of the second U-shaped rod; the arrangement of the above structure makes the closed side of the first U-shaped rod and the second U-shaped rod be able to support and limit the first connecting rod and the second connecting rod when the first U-shaped rod and the first connecting rod and the second U-shaped rod and the second connecting rod are fully unfolded, limits the first connecting rod and the second connecting rod from being flipped upward relative to the first U-shaped rod and the second U-shaped rod, guarantees the stable supportability when the first U-shaped rod and the first connecting rod and the second U-shaped rod and the second connecting rod are fully unfolded, and allows the first connecting rod and the second connecting rod to rotate relative to the first U-shaped rod and the second U-shaped rod when being folded, guarantees the realization of the folding function.

[0009] As preferred, the first wheelchair side frame is internally provided with a plurality of first protrusions rotatably connected with the first connecting rods and the first U-shaped rods, and the second wheelchair side frame is internally provided with a plurality of second protrusions rotatably connected with the second connecting rods and the second U-shaped rods; the first protrusions and the second protrusions are arranged to increase the connecting and rotating space between the first connecting rods, the second connecting rods, the first U-shaped rods, the second U-shaped rods, the first wheelchair side frame and the second wheelchair side frame, so as to avoid the limitation of the rotation of the first connecting rods, the second connecting rods, the first U-shaped rods and the second U-shaped rods, and to realize the complete folding.

[0010] As preferred, the first U-shaped rods and the second U-shaped rods are respectively connected with the first wheelchair side frame and the second wheelchair side frame at the positions where the first U-shaped rods and the second U-shaped rods are upward, and are respectively provided with notches; the notches are arranged to reduce the space occupation of the connecting positions of the first U-shaped rods and the second U-shaped rods with the first wheelchair side frame and the second wheelchair side frame, so as to avoid the interference with the rotation of the first U-shaped rods and the second U-shaped rods.

[0011] As preferred, the two first connecting rods are connected through a first horizontal rod, and the two second connecting rods are connected through a second horizontal rod; the first horizontal rod and the second horizontal rod are arranged to respectively connect the first connecting rods and the second connecting rods, so that the two first connecting rods and the second connecting rods can be synchronously moved to realize the folding function, avoid the dislocation of the two first connecting rods and the second connecting rods, and improve the structural strength of the first connecting rods and the second connecting rods, so that the support to the human body is more reliable.

[0012] Therefore, the utility model has the characteristics of reducing the required height when folding the wheelchair, reducing the required storage space, reducing the packaging cost, improving the stability and comfort of driving, etc. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is the structure schematic diagram when the utility model is unfolded.

[0014] Fig. 2 is the structure schematic diagram when the utility model is folded. DETAILED DESCRIPTION

[0015] The technical scheme of the utility model will be further specifically explained below by combining with the drawings.

[0016] As Figs. 1-2As shown, a wheelchair folding structure comprises a first wheelchair side frame 1 and a second wheelchair side frame 2 arranged in parallel with each other, two first connecting rods 11 and two second connecting rods 21 arranged in parallel with each other between the first wheelchair side frame 1 and the second wheelchair side frame 2, one end of the first connecting rod 11 being rotatably connected to the bottom side of the first wheelchair side frame 1, the other end of the first connecting rod 11 being provided with a first U-shaped rod 12 rotatable up and down and rotatably connected to the top side of the second wheelchair side frame 2, one end of the second connecting rod 21 being rotatably connected to the bottom side of the second wheelchair side frame 1, the other end of the second connecting rod 21 being provided with a second U-shaped rod 22 rotatable up and down and rotatably connected to the top side of the first wheelchair side frame 1, the first connecting rod 11 and the second connecting rod 21 being rotatably connected, the midpoint of the total length of the first connecting rod 11 and the first U-shaped rod 12 being rotatably connected to the midpoint of the total length of the second connecting rod 21 and the second U-shaped rod 22 through a rotating shaft, the two first connecting rods 11 being connected through a first cross rod 14, and the two second connecting rods 21 being connected through a second cross rod 24.

[0017] The first wheelchair side frame and the second wheelchair side frame are arranged in parallel with each other to form a wheelchair support, support the first connecting rod and the second connecting rod, and connect the two groups of first connecting rods and second connecting rods between the first wheelchair side frame and the second wheelchair side frame and combine them through the first cross rod and the second cross rod to form a support structure for the human body, which can maintain the folding function, the bottom ends of the first connecting rod and the second connecting rod are rotatably connected to the bottom sides of the first wheelchair side frame and the second wheelchair side frame respectively, the top ends of the first connecting rod and the second connecting rod are rotatably connected to one end of the first U-shaped rod and the second U-shaped rod respectively, the other end of the first U-shaped rod and the second U-shaped rod is rotatably connected to the first wheelchair side frame and the second wheelchair side frame respectively, and the midpoint between the total length of the first connecting rod and the first U-shaped rod after connection and the total length of the second connecting rod and the second U-shaped rod after connection is connected through a rotating shaft, thereby forming a complete folding structure, so that the first wheelchair side frame and the second wheelchair side frame can be relatively close or far away, realizing the folding or unfolding of the wheelchair; when folding, the first wheelchair side frame and the second wheelchair side frame are close to each other, and the first U-shaped rod and the second U-shaped rod are rotated relative to the first connecting rod and the second connecting rod respectively, and the first U-shaped rod and the second U-shaped rod are folded downward respectively, thereby realizing the reduction of the required height when folding the wheelchair, and when unfolding, the first U-shaped rod and the second U-shaped rod form a nearly straight line state between the first connecting rod and the second connecting rod respectively, supporting the human body.

[0018] As Figs. 1-2As shown, the openings of the first U-shaped rod 12 and the second U-shaped rod 22 are both arranged downward, the first connecting rod 11 is connected to the inner side of the first U-shaped rod 12, the second connecting rod 21 is connected to the inner side of the second U-shaped rod 22, the inner side of the first wheelchair side frame 1 is provided with a plurality of first protrusions 13 rotatably connected with the first connecting rod 11 and the first U-shaped rod 12, the inner side of the second wheelchair side frame 2 is provided with a plurality of second protrusions 23 rotatably connected with the second connecting rod 21 and the second U-shaped rod 22, and the first U-shaped rod 12 and the second U-shaped rod 22 are both provided with a notch 121 at the position where they are connected with the first wheelchair side frame 1 and the second wheelchair side frame 2 and face upward.

[0019] When the wheelchair is unfolded, the openings of the first U-shaped rod and the second U-shaped rod face downward, and the closed sides face upward. When the human body is pressed downward, the closed sides of the ends of the first U-shaped rod and the second U-shaped rod limit and support the ends of the first connecting rod and the second connecting rod, respectively, so that the first U-shaped rod and the second U-shaped rod can maintain support for the human body when they are connected with the first connecting rod and the second connecting rod, respectively. The first protrusions and the second protrusions extend to the inner side of the first wheelchair side frame and the second wheelchair side frame and are rotatably connected with the ends of the first connecting rod, the second connecting rod, the first U-shaped rod and the second U-shaped rod. The notches are located on the outer side of the first U-shaped rod and the second U-shaped rod, respectively. When folded, the notches on the outer side of the first U-shaped rod and the second U-shaped rod cooperate with the inner side structure of the first wheelchair side frame and the second wheelchair side frame, and the notches adapt to the inner side structure of the first wheelchair side frame and the second wheelchair side frame for folding.

Claims

1. A wheelchair folding structure, characterized in that: The wheelchair includes a first wheelchair side frame (1) and a second wheelchair side frame (2) arranged in parallel. Two parallel first connecting rods (11) and second connecting rods (21) are provided between the first wheelchair side frame (1) and the second wheelchair side frame (2). One end of the first connecting rod (11) is rotatably connected to the bottom side of the first wheelchair side frame (1), and the other end of the first connecting rod (11) is provided with a first U-shaped rod (12) that can rotate up and down and is rotatably connected to the top side of the second wheelchair side frame (2). One end of the second connecting rod (21) is rotatably connected to the bottom side of the second wheelchair side frame (2), and the other end of the second connecting rod (21) is provided with a second U-shaped rod (22) that can rotate up and down and is rotatably connected to the top side of the first wheelchair side frame (1). The first connecting rod (11) and the second connecting rod (21) are rotatably connected to each other.

2. The wheelchair folding structure according to claim 1, characterized in that: The midpoint of the total length of the first connecting rod (11) and the first U-shaped rod (12) is connected to the midpoint of the total length of the second connecting rod (21) and the second U-shaped rod (22) via a pivot.

3. The wheelchair folding structure according to claim 1 or 2, characterized in that: The openings of the first U-shaped rod (12) and the second U-shaped rod (22) are both set downwards. The end of the first connecting rod (11) is connected to the inside of the first U-shaped rod (12), and the end of the second connecting rod (21) is connected to the inside of the second U-shaped rod (22).

4. The wheelchair folding structure according to claim 1 or 2, characterized in that: The inner side of the first wheelchair side frame (1) is provided with a plurality of first protrusions (13) that are rotatably connected to the first connecting rod (11) and the first U-shaped rod (12), and the inner side of the second wheelchair side frame (2) is provided with a plurality of second protrusions (23) that are rotatably connected to the second connecting rod (21) and the second U-shaped rod (22).

5. The wheelchair folding structure according to claim 1 or 2, characterized in that: The first U-shaped rod (12) and the second U-shaped rod (22) are respectively connected to the first wheelchair side frame (1) and the second wheelchair side frame (2), and both have notches (121) at the upward position.

6. The wheelchair folding structure according to claim 1 or 2, characterized in that: The two first links (11) are connected by a first crossbar (14), and the two second links (21) are connected by a second crossbar (24).

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