CN215229413U

CN215229413U - Anti-rollover device of wheelchair

Info

Publication number: CN215229413U
Application number: CN202121163448.7U
Authority: CN
Inventors: 胡云涛; 陈荣首
Original assignee: Shanghai Aomang Electronic Technology Co ltd
Current assignee: Shanghai Aomang Electronic Technology Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-12-21
Anticipated expiration: 2031-05-27

Abstract

The utility model discloses a side turning prevention device of a wheelchair, which relates to the technical field of the wheelchair, wherein a fixed plate is fixed on the outer surface of a main shaft, an auxiliary shaft is fixed at the lower end position of the fixed plate on the right side of the main shaft, the lower ends of the main shaft and the auxiliary shaft are rotatably connected with a linkage device, a clamping plate is fixed at the lower end of the linkage device, a main wheel is rotatably connected inside the clamping plate, a positioning plate is fixed at the lower end position of the linkage device on the right side of the clamping plate, and an auxiliary wheel is rotatably connected inside the positioning plate. The rotating wheel can reduce the friction with the surface of the wheel body, and the normal rotation and movement of the wheel body are ensured.

Description

Anti-rollover device of wheelchair

Technical Field

The utility model relates to a wheelchair technical field especially relates to a device of preventing turning on one's side of wheelchair.

Background

The side-turn preventing device of the wheelchair supports the main wheel through the external auxiliary wheel, prevents the angle between the main wheel and the ground from being too small, and ensures that the wheelchair keeps stable in the turning process.

However, when the existing anti-rollover device is used, because the auxiliary wheels are hard wheels, the auxiliary wheels can only avoid the wheelchair from rolling over when the wheelchair turns, but cannot help the wheelchair to return to the right, so that the wheelchair continuously moves forward and deviates the direction, and the personal safety of a user is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device of turning on one's side of preventing of wheelchair has solved the technical problem that the device of turning on one's side can't help the unable protection user's safety of wheelchair return.

In order to solve the technical problem, the utility model provides a rollover prevention device of a wheelchair, which comprises a main shaft, wherein a fixed plate is fixed on the outer surface of the main shaft, an auxiliary shaft is fixed at the lower end position of the fixed plate on the right side of the main shaft, the lower ends of the main shaft and the auxiliary shaft are rotatably connected with a linkage device, a clamping plate is fixed at the lower end of the linkage device, a main wheel is rotatably connected inside the clamping plate, a positioning plate is fixed at the lower end position of the linkage device on the right side of the clamping plate, and an auxiliary wheel is rotatably connected inside the positioning plate;

the auxiliary wheel comprises a wheel body, a spring is fixed on the inner surface of the wheel body, a middle shaft is fixed at one end of the spring, and a limiting rod is fixed in the middle of the spring at the surface position of the middle shaft;

the limiting rod comprises a rod body, a limiting frame is fixed at the upper end of the rod body, and a rotating wheel is rotatably connected to the inner surface of the limiting frame.

Preferably, the outer surface of the wheel body is provided with a rubber tire, and the middle shaft is rotatably connected with the positioning plate through an internal bearing.

Preferably, the rotating shaft is fixed at two ends of the rotating wheel and is rotatably connected with the limiting frame, and the lower end of the rod body is fixed on the surface of the middle shaft.

Preferably, the diameter of the outer surface of the auxiliary wheel is smaller than that of the outer surface of the main wheel, and the upper end of the main shaft is fixed at the bottom of the wheelchair.

Preferably, the linkage device comprises a main connecting plate, the right end of the main connecting plate is rotatably connected with a linkage rod, and the right end of the linkage rod is rotatably connected with an auxiliary connecting plate.

Preferably, the upper ends of the main connecting plate and the auxiliary connecting plate are respectively connected with the main shaft and the auxiliary shaft in a rotating manner, and the main connecting plate and the auxiliary connecting plate are on the same horizontal plane.

Compared with the prior art, the utility model provides a pair of device of preventing turning on one's side of wheelchair has following beneficial effect:

the utility model provides an auxiliary wheel, through the shift position of the inside spring restriction wheel body of auxiliary wheel, guarantee that the wheel body has a reverse effort when receiving the extrusion, help wheelchair quick return rocks when avoiding the auxiliary wheel of stereoplasm to lead to the wheelchair slope, and the position of gag lever post restriction wheel body makes the wheel body can not remove too much distance for the axis, rotates the wheel can reduce with the friction on wheel body surface, guarantees the normal rotation and the removal of wheel body.

The utility model provides a linkage adopts the gangbar to interconnect main junction board and auxiliary junction board to make main round and auxiliary wheel direction remain unanimous throughout, can avoid the auxiliary wheel to change the direction of advance of wheelchair when the wheelchair turns, make the wheelchair advance towards predetermined direction, thereby guarantee user's personal safety.

Drawings

FIG. 1 is a main structure view of the present invention;

FIG. 2 is a structural diagram of an auxiliary wheel of the present invention;

FIG. 3 is a structural diagram of the stop lever of the present invention;

fig. 4 is a structural diagram of the middle linkage device of the present invention.

Reference numbers in the figures: 1. the device comprises a main shaft, 2, a linkage device, 3, a main wheel, 4, a clamping plate, 5, an auxiliary wheel, 6, a positioning plate, 7, an auxiliary shaft, 8, a fixing plate, 21, a main connecting plate, 22, an auxiliary connecting plate, 23, a linkage rod, 51, a limiting rod, 52, a spring, 53, a wheel body, 54, a middle shaft, 511, a rod body, 512, a limiting frame, 513 and a rotating wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the first embodiment, as shown in fig. 1-4, the utility model discloses a side turning prevention device of a wheelchair, which comprises a main shaft 1, wherein a fixed plate 8 is fixed on the outer surface of the main shaft 1, an auxiliary shaft 7 is fixed at the lower end of the fixed plate 8 on the right side of the main shaft 1, the lower ends of the main shaft 1 and the auxiliary shaft 7 are rotatably connected with a linkage device 2, a clamping plate 4 is fixed at the lower end of the linkage device 2, a main wheel 3 is rotatably connected inside the clamping plate 4, a positioning plate 6 is fixed at the lower end of the linkage device 2 on the right side of the clamping plate 4, and an auxiliary wheel 5 is rotatably connected inside the positioning plate 6;

the auxiliary wheel 5 comprises a wheel body 53, a spring 52 is fixed on the inner surface of the wheel body 53, a middle shaft 54 is fixed at one end of the spring 52, and a limiting rod 51 is fixed in the middle of the spring 52 at the surface position of the middle shaft 54;

the limiting rod 51 comprises a rod body 511, a limiting frame 512 is fixed at the upper end of the rod body 511, and a rotating wheel 513 is rotatably connected to the inner surface of the limiting frame 512.

In the second embodiment, on the basis of the first embodiment, the linkage device 2 includes a main connecting plate 21, a linkage rod 23 is rotatably connected to the right end of the main connecting plate 21, and an auxiliary connecting plate 22 is rotatably connected to the right end of the linkage rod 23.

The working principle is as follows:

when the wheelchair moves, the main shaft 1 is driven to move, the main shaft 1 moves through the auxiliary shaft 7, the main shaft 1 and the auxiliary shaft 7 move to drive the linkage device 2 to move, the linkage device 2 moves to drive the clamping plate 4 and the positioning plate 6 to move, the main wheels 3 and the auxiliary wheels 5 move on the ground, and when the wheelchair turns, the angle of the wheelchair is tilted, the wheel body 53 contacts with the ground, the wheel body 53 is pressed by the ground to move relative to the middle shaft 54, the wheel body 53 presses the spring 52 to deform the spring 52, the deformed spring 52 pushes the wheel body 53 outwards to help the wheelchair return, when the wheel body 53 moves too far relative to the middle shaft 54, the wheel body 53 contacts with the surface of the limiting rod 51, the position of the wheel body 53 is limited, due to the extending property of the spring 52, the wheel body 53 rotates relative to the central shaft 54, and the rotating wheel body 53 contacts with the surface of the rotating wheel 513 to drive the rotating wheel 513 to rotate, so that the obstruction of the wheel body 53 caused by the limiting rod 51 is reduced.

When the wheelchair turns, the main wheel 3 can drive the clamping plate 4 to rotate, the clamping plate 4 rotates to drive the main connecting plate 21 to rotate, the main connecting plate 21 rotates to drive the auxiliary connecting plate 22 to rotate through the linkage rod 23, the auxiliary connecting plate 22 rotates to drive the positioning plate 6 to rotate, the positioning plate 6 rotates to drive the auxiliary wheel 5 to rotate, the main wheel 3 and the auxiliary wheel 5 are in the same direction, and the auxiliary wheel 5 and the main wheel 3 are in the same direction to avoid the deviation direction of the wheelchair when the auxiliary wheel 5 contacts the ground, so that the normal movement of the wheelchair is ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a device of preventing turning on one's side of wheelchair, includes main shaft (1), its characterized in that: a fixing plate (8) is fixed on the outer surface of the main shaft (1), an auxiliary shaft (7) is fixed at the lower end of the fixing plate (8) on the right side of the main shaft (1), a linkage device (2) is rotatably connected to the lower ends of the main shaft (1) and the auxiliary shaft (7), a clamping plate (4) is fixed at the lower end of the linkage device (2), a main wheel (3) is rotatably connected to the inside of the clamping plate (4), a positioning plate (6) is fixed at the lower end of the linkage device (2) on the right side of the clamping plate (4), and an auxiliary wheel (5) is rotatably connected to the inside of the positioning plate (6);

the auxiliary wheel (5) comprises a wheel body (53), a spring (52) is fixed on the inner surface of the wheel body (53), a middle shaft (54) is fixed at one end of the spring (52), and a limiting rod (51) is fixed in the middle of the spring (52) at the surface position of the middle shaft (54);

the limiting rod (51) comprises a rod body (511), a limiting frame (512) is fixed at the upper end of the rod body (511), and a rotating wheel (513) is rotatably connected to the inner surface of the limiting frame (512).

2. The rollover prevention device of a wheelchair as claimed in claim 1, wherein the outer surface of the wheel body (53) is provided with rubber tires, and the middle shaft (54) is rotatably connected with the positioning plate (6) through an internal bearing.

3. The rollover prevention device of a wheelchair as claimed in claim 1, wherein the rotating wheels (513) are fixed at two ends thereof with rotating shafts rotatably connected with the limiting frame (512), and the lower ends of the rod bodies (511) are fixed on the surface of the center shaft (54).

4. The rollover prevention device of a wheelchair as claimed in claim 1, wherein the diameter of the outer surface of the auxiliary wheel (5) is smaller than the diameter of the outer surface of the main wheel (3), and the upper end of the main shaft (1) is fixed to the bottom of the wheelchair.

5. The rollover prevention device of a wheelchair as claimed in claim 1, wherein the linkage device (2) comprises a main connecting plate (21), a linkage rod (23) is rotatably connected to the right end of the main connecting plate (21), and an auxiliary connecting plate (22) is rotatably connected to the right end of the linkage rod (23).

6. The rollover prevention device of a wheelchair as claimed in claim 5, wherein the main connecting plate (21) and the auxiliary connecting plate (22) are rotatably connected at their upper ends to the main shaft (1) and the auxiliary shaft (7), respectively, and the main connecting plate (21) and the auxiliary connecting plate (22) are on the same horizontal plane.