Adjustable and turnover wheelchair anti-toppling wheel set

Abstract

The utility model relates to the technical field of wheelchairs, in particular to an adjustable and turnover wheelchair anti-toppling wheel set which comprises a wheelchair rear bottom pipe and further comprises a retroverted straight pipe and a retroverted bent pipe, the retroverted straight pipe is detachably inserted into the wheelchair rear bottom pipe, a rotating part is arranged between the retroverted straight pipe and the retroverted bent pipe, and the rotating part is connected with the wheelchair rear bottom pipe. The rotating part enables the retroverted bent pipe to turn over relative to the retroverted straight pipe, the bottom end of the retroverted bent pipe is sleeved with a retroverted adjusting pipe in a sliding mode, and an auxiliary wheel set is arranged at the bottom end of the retroverted adjusting pipe. According to the utility model, through the arrangement of the rotating part, the retroverted bent pipe can turn over by 180 degrees relative to the retroverted straight pipe, so that the auxiliary wheel set is driven to turn over to the upper part to be separated from the ground, the auxiliary wheel set can be conveniently and rapidly turned over upwards under the condition that the auxiliary wheel set does not need to be used, and convenience is provided for actual use.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to an adjustable and flipable anti-tipping wheel set for a wheelchair. Background Art

[0002] A wheelchair is a chair that can help people with limited mobility to move around, greatly facilitating the care and movement of people with limited mobility. When traveling on uneven or obstacle-rich ground, a wheelchair is prone to tipping over. Currently, in order to prevent tipping over and avoid injury to the user, auxiliary wheel sets are usually installed on the wheelchair.

[0003] For example, Chinese Patent Publication No. CN107397637A discloses a detachable anti-tipping tube for a wheelchair. By providing the anti-tipping tube and anti-tipping small wheels, it can play a role in preventing tipping over.

[0004] However, the applicant found that the anti-tipping small wheels in the comparative document cannot be adjusted in height, making it difficult to adjust according to the actual use environment. Moreover, when the anti-tipping small wheels are not needed, they cannot be quickly flipped and retracted, causing inconvenience to subsequent normal use. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide an adjustable and flipable anti-tipping wheel set for a wheelchair to solve the problems that the existing anti-tipping wheel set cannot be adjusted in height and cannot be quickly flipped and retracted when not needed, so that the anti-tipping wheel set is separated from the ground, causing inconvenience to subsequent normal use.

[0006] Based on the above purpose, the present utility model provides an adjustable and flipable anti-tipping wheel set for a wheelchair, including a rear bottom tube of the wheelchair, and further including a rear tilt straight tube and a rear tilt bent tube. The rear tilt straight tube is detachably inserted into the rear bottom tube of the wheelchair. A rotating part is provided between the rear tilt straight tube and the rear tilt bent tube, and the rotating part enables the rear tilt bent tube to flip relative to the rear tilt straight tube;

[0007] The bottom end of the rear tilt bent tube is sleeved with a rear tilt adjusting tube in a sliding manner, and an auxiliary wheel set is provided at the bottom end of the rear tilt adjusting tube.

[0008] Preferably, single-head elastic pieces are provided in both the rear tilt straight tube and the rear tilt bent tube. The single-head elastic piece is composed of a V-shaped metal sheet and a bead. The bead is fixedly connected to the V-shaped metal sheet. Through holes for the bead to penetrate are provided on both the rear tilt straight tube and the rear tilt bent tube, and holes for the bead to be clamped are provided on both the rear bottom tube of the wheelchair and the rear tilt adjusting tube.

[0009] Preferably, the number of holes on the rear tilt adjusting tube is not less than four, and the holes with a number not less than four are evenly distributed on the rear tilt adjusting tube.

[0010] Preferably, the rotating part includes a boss fixedly connected to the end of the rearward inclined curved tube, the end of the rearward inclined straight tube is fixedly connected with a recess matched with the boss, a bolt is arranged in the rearward inclined straight tube, and a through hole is formed on the recess for the end of the bolt to pass through, and an internal threaded hole matched with the bolt is formed on the boss.

[0011] Preferably, the bolt 1 is threadedly connected to the internal threaded hole, and a spring is sleeved on the bolt 1, one end of the spring abuts against the end of the recess, and the other end of the spring abuts against the head of the bolt 1.

[0012] Preferably, the auxiliary wheel set includes two auxiliary wheels, the caster adjustment tube is located between the two auxiliary wheels, and a plastic U-shaped washer is provided between the auxiliary wheel and the caster adjustment tube, the auxiliary wheel and the plastic U-shaped washer are penetrated by bolt 2, a gasket is sleeved on the bolt 2, and a nut for limiting and fixing the auxiliary wheel is threadedly connected on the bolt 2.

[0013] The beneficial effects of the utility model: the utility model provides an adjustable and flippable wheelchair anti-tipping wheel set, which, through the setting of the rearward tilt adjustment tube, enables the rearward tilt adjustment tube to move on the rearward tilt curved tube, thereby being able to change the height of the anti-tipping wheel set, and is convenient for adjustment according to the actual use environment, providing convenience for use; and through the setting of the rotating part, the rearward tilt curved tube can be flipped 180° relative to the rearward tilt straight tube, thereby driving the auxiliary wheel set to flip upward and separate from the ground, making it convenient to quickly flip the auxiliary wheel set upward when the auxiliary wheel set is not needed, providing convenience for actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0017] Figure 3 It is a cross-sectional view of the backward-inclined curved pipe, the rotating portion and the backward-inclined straight pipe according to an embodiment of the utility model.

[0018] In the figure: 1. Rearward-inclined bend pipe; 2. Convex seat; 3. Rearward-inclined straight pipe; 4. Concave seat; 5. Rearward-inclined adjustment pipe; 6. Rear bottom pipe of wheelchair; 7. Bolt 1; 8. Spring; 9. Single-head elastic piece; 10. Auxiliary wheel; 11. Nut; 12. Gasket; 13. Plastic U-shaped washer; 14. Bolt 2. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0020] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present utility model should have the ordinary meanings understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connection" or "coupling" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute positions of the objects to be described change, the relative positional relationships may also change accordingly.

[0021] As Figure 1 , Figure 2 , Figure 3 shown, an adjustable and flipable anti-tipping wheel set for a wheelchair includes a rear bottom pipe 6 of the wheelchair. The rear bottom pipe 6 of the wheelchair is arranged on the wheelchair and is located between two wheels on the wheelchair, which belongs to the prior art. For the position setting of the rear bottom pipe 6 of the wheelchair, reference can be made to the background art. It further includes a rearward-inclined straight pipe 3 and a rearward-inclined bend pipe 1. The rearward-inclined straight pipe 3 is detachably inserted into the rear bottom pipe 6 of the wheelchair. A rotating part is arranged between the rearward-inclined straight pipe 3 and the rearward-inclined bend pipe 1, and the rotating part enables the rearward-inclined bend pipe 1 to flip relative to the rearward-inclined straight pipe 3;

[0022] A rearward-inclined adjustment pipe 5 is slidably sleeved at the bottom end of the rearward-inclined bend pipe 1, and an auxiliary wheel set is arranged at the bottom end of the rearward-inclined adjustment pipe 5.

[0023] Through the arrangement of the rotating part, when the rearward-inclined bend pipe 1 flips relative to the rearward-inclined straight pipe 3, it can drive the rearward-inclined adjustment pipe 5 and the auxiliary wheel set to flip. The auxiliary wheel set can flip to the upper side and be separated from the ground, which is convenient for quickly flipping the auxiliary wheel set upward when the auxiliary wheel set is not needed, reducing the wear of the auxiliary wheel set, and at the same time avoiding the abnormal noise generated by the auxiliary wheel set during walking, providing convenience for actual use.

[0024] In a preferred embodiment of the present utility model, single-headed elastic pieces 9 are arranged in both the rearward-tilted straight pipe 3 and the rearward-tilted bent pipe 1. The single-headed elastic piece 9 is composed of a V-shaped metal piece and a clamping bead. The clamping bead is fixedly connected to the V-shaped metal piece. The V-shaped metal piece is made of an elastic metal material. Through holes for the clamping bead to penetrate are provided on both the rearward-tilted straight pipe 3 and the rearward-tilted bent pipe 1, and holes for the clamping bead to be clamped are provided on both the rear bottom pipe 6 of the wheelchair and the rearward-tilt adjustment pipe 5.

[0025] When it is necessary to remove the auxiliary wheel set from the wheelchair, that is, only need to remove the rearward-tilted straight pipe 3 from the rearward-tilted bottom pipe 6. Manually press the clamping bead to overcome the elastic force of the V-shaped metal piece, so that the clamping bead contracts inward and disengages from the hole on the rear bottom pipe 6 of the wheelchair. Then, pulling the rearward-tilted straight pipe 3 outward can separate the rearward-tilted straight pipe 3 from the rear bottom pipe 6 of the wheelchair, thus completing the disassembly of the rearward-tilted straight pipe 3.

[0026] In another preferred embodiment of the present utility model, the number of holes on the rearward-tilt adjustment pipe 5 is not less than four, and the holes with the number not less than four are evenly distributed on the rearward-tilt adjustment pipe 5.

[0027] By providing a plurality of holes on the rearward-tilt adjustment pipe 5, when it is necessary to change the height position of the auxiliary wheel set, only need to change the sleeving height of the rearward-tilt adjustment pipe 5 on the rearward-tilted bent pipe 1. Manually press the clamping bead located on the rearward-tilted bent pipe 1, so that the clamping bead contracts inward and disengages from the hole on the rearward-tilt adjustment pipe 5. Then, pull the rearward-tilt adjustment pipe 5 to move. After moving to the hole at the corresponding position according to the actual situation, then under the action of the elastic force of the V-shaped metal piece, the clamping bead can be pushed to be clamped in the hole on the rearward-tilt adjustment pipe 5, thus achieving the purpose of adjusting the height of the auxiliary wheel set.

[0028] In still another preferred embodiment of the present utility model, the rotating part includes a convex seat 2 fixedly connected to the end of the rearward-tilted bent pipe 1. A concave seat 4 adapted to the convex seat 2 is fixedly connected to the end of the rearward-tilted straight pipe 3. A bolt 7 is arranged in the rearward-tilted straight pipe 3, and a through hole for the end of the bolt 7 to pass through is provided on the concave seat 4. An internal threaded hole adapted to the bolt 7 is provided on the convex seat 2.

[0029] It should be noted that the bolt 7 is threadedly connected to the internal threaded hole, and a spring 8 is sleeved on the bolt 7. One end of the spring 8 abuts against the end of the concave seat 4, and the other end of the spring 8 abuts against the head on the bolt 7.

[0030] Under the action of the elastic force of the spring 8, the bolt 7 can be pushed to move into the rearward-tilted straight pipe 3, so that the convex seat 2 can be pushed to closely abut against the concave seat 4.

[0031] When the auxiliary wheels 10 are not needed, the tilting pipe is pulled against the elastic force of the spring 8, so that the convex seat 2 and the concave seat 4 are separated from each other, and the tilting pipe 1 is rotated, so that the tilting pipe 1 drives the auxiliary wheels to flip 180°. After the flipping is completed, under the action of the elastic force of the spring 8, the concave seat 4 is pushed to combine with the convex seat 2, realizing the fixation of the flipped auxiliary wheel set. It is convenient to quickly flip the auxiliary wheels 10 upward when the auxiliary wheels 10 are not needed, reducing the wear of the auxiliary wheels 10, and at the same time avoiding abnormal noises generated by the auxiliary wheels 10 during walking, which provides convenience for actual use.

[0032] It should be noted that the auxiliary wheel set includes two auxiliary wheels 10. The tilting adjustment pipe 5 is located between the two auxiliary wheels 10. A plastic U-shaped gasket 13 is arranged between the auxiliary wheel 10 and the tilting adjustment pipe 5. The auxiliary wheel 10 and the plastic U-shaped gasket 13 are penetrated by a second bolt 14. A gasket 12 is sleeved on the second bolt 14, and a nut 11 for limiting and fixing the auxiliary wheel 10 is threadedly connected to the second bolt 14. Through the arrangement of the second bolt 14 and the nut 11, it is convenient to replace the auxiliary wheel 10.

[0033] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary, and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0034] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An adjustable and flipable anti-tipping wheel set for a wheelchair, comprising a rear bottom tube (6) of the wheelchair, characterized in that, It further includes a rearwardly inclined straight pipe (3) and a rearwardly inclined bent pipe (1). The rearwardly inclined straight pipe (3) is detachably inserted into the rear bottom pipe (6) of the wheelchair. A rotating part is provided between the rearwardly inclined straight pipe (3) and the rearwardly inclined bent pipe (1), and the rotating part enables the rearwardly inclined bent pipe (1) to flip relative to the rearwardly inclined straight pipe (3). A rearward tilt adjustment pipe (5) is slidably sleeved at the bottom end of the rearwardly inclined bent pipe (1), and an auxiliary wheel set is provided at the bottom end of the rearward tilt adjustment pipe (5).

2. The adjustable and rotatable anti-tipping wheel set for wheelchair according to claim 1, characterized in that, Single-headed elastic pieces (9) are arranged in both the rearwardly inclined straight pipe (3) and the rearwardly inclined bent pipe (1). The single-headed elastic piece (9) is composed of a V-shaped metal piece and a clamping bead. The clamping bead is fixedly connected to the V-shaped metal piece. Through holes for the clamping bead to penetrate are provided on both the rearwardly inclined straight pipe (3) and the rearwardly inclined bent pipe (1), and holes for the clamping bead to be clamped are provided on both the rear bottom pipe (6) of the wheelchair and the rearward tilt adjustment pipe (5).

3. The adjustable and rotatable wheelchair anti-tipping wheel set according to claim 2, wherein The number of holes on the rearward tilt adjustment pipe (5) is not less than four, and the holes with the number not less than four are equally spaced on the rearward tilt adjustment pipe (5).

4. The adjustable and rotatable wheelchair anti-tipping wheel set according to claim 1, characterized in that, The rotating part includes a convex seat (2) fixedly connected to the end of the rearwardly inclined bent pipe (1). A concave seat (4) adapted to the convex seat (2) is fixedly connected to the end of the rearwardly inclined straight pipe (3). A bolt one (7) is arranged in the rearwardly inclined straight pipe (3), and a through hole for the end of the bolt one (7) to pass through is provided on the concave seat (4). An internal threaded hole adapted to the bolt one (7) is provided on the convex seat (2).

5. The adjustable and flipable wheelchair anti-tipping wheel set according to claim 4, characterized in that, The bolt one (7) is threadedly connected to the internal threaded hole, and a spring (8) is sleeved on the bolt one (7). One end of the spring (8) abuts against the end of the concave seat (4), and the other end of the spring (8) abuts against the head on the bolt one (7).

6. The adjustable and rotatable wheelchair anti-tipping wheel set according to claim 1, characterized in that The auxiliary wheel set includes two auxiliary wheels (10). The rearward tilt adjustment pipe (5) is located between the two auxiliary wheels (10). A plastic U-shaped washer (13) is provided between the auxiliary wheel (10) and the rearward tilt adjustment pipe (5). The auxiliary wheel (10) and the plastic U-shaped washer (13) are penetrated by a bolt two (14). A gasket (12) is sleeved on the bolt two (14), and a nut (11) for limiting and fixing the auxiliary wheel (10) is threadedly connected to the bolt two (14).

Images