Adjustable wheel tilting prevention mechanism of wheelchair

Abstract

The application discloses an adjustable wheel tilting prevention mechanism of a wheelchair, comprising: a wheelchair frame, which is folded or unfolded by rotating the wheelchair frame; the motor frame is installed on the wheelchair frame, a containing groove is formed in the motor frame, and a positioning part is installed in the containing groove; the anti-toppling frame is detachably mounted on the positioning part through a locking piece, and an anti-toppling wheel is rotationally arranged at one end of the anti-toppling frame; the rear distance of the anti-tilting wheel is adjusted by changing the relative position of the anti-tilting frame and the locking piece. Auxiliary wheels are further arranged on the wheelchair frame, the rear distance of the anti-toppling wheels is shortest, and in the folded state, the auxiliary wheels, the anti-toppling wheels and the rear wheels are all kept tangent to the ground.

Description

Technical Field

[0001] This application relates to the technical field of electric wheelchairs, and particularly to an adjustable anti-tipping wheel mechanism for wheelchair vehicles. Background Art

[0002] As a means of transportation for the disabled and those with limited mobility, the anti-tipping wheel of an electric wheelchair, as a safety device, is crucial for ensuring the stability and safety of users on different terrains and in different environments.

[0003] For example, the anti-back-tipping wheelchair proposed in the publication number CN215229384U can prevent the vehicle body from tipping backward through the anti-back-tipping device. However, due to the fixed position of the anti-tipping wheel structure, in some cases, the center of gravity will move backward, making it easier to tip backward. Moreover, for some foldable wheelchairs, such anti-tipping wheels will, to a certain extent, affect the folding limit.

[0004] The above content is only used to assist in understanding the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides an adjustable anti-tipping wheel mechanism for wheelchair vehicles to solve one of the above technical problems.

[0006] The technical solution adopted by this application to solve its technical problems includes: a wheelchair frame that forms a folded state or an unfolded state by rotating the wheelchair frame; a motor mount installed on the wheelchair frame, with a receiving groove formed on the motor mount, and a positioning portion installed in the receiving groove; an anti-tipping frame detachably installed with the positioning portion through a locking member, and an anti-tipping wheel rotatably provided at one end thereof. The rear position of the anti-tipping wheel is adjusted by changing the relative position between the anti-tipping frame and the locking member.

[0007] In some embodiments, the positioning portion is L-shaped, and a threaded hole is formed at one end connected to the anti-tipping frame.

[0008] In some embodiments, a plurality of circular holes are formed on both sides of the anti-tipping frame.

[0009] In some embodiments, the locking member includes a threaded section and an abutting section. When the locking member is installed on the positioning portion, the threaded section cooperates with the threaded hole, and the abutting section penetrates through the circular hole.

[0010] In some embodiments, a limiting groove is formed at the top of the anti-tipping frame, and a plurality of limiting blocks cooperating with the limiting groove are provided at the bottom of the motor mount.

[0011] In some embodiments, the positioning portion is installed on the inner wall of the receiving groove through threaded connection.

[0012] In some embodiments, a rear wheel is rotatably provided on one side of the motor frame, an auxiliary wheel is provided on the wheelchair frame, the shortest rearward distance of the anti-tipping wheel is the shortest, and in the folded state, the auxiliary wheel, the anti-tipping wheel and the rear wheel are all tangent to the ground.

[0013] The beneficial effects of the present application are as follows: The anti-tipping wheel with an adjustable rearward distance can be adapted to various road sections. When the road conditions during daily driving are good, the center of gravity can be stabilized by removing the anti-tipping frame or shortening the rearward distance of the anti-tipping wheel, and it can play a role in preventing forward tipping to a certain extent. When the road conditions during daily driving are poor, the rearward distance of the anti-tipping wheel can be extended to prevent safety accidents caused by backward tipping when going uphill, etc. Moreover, for some folding wheelchair structures, the anti-tipping wheel after folding can play the role of an auxiliary wheel by adjusting the rearward distance, which is convenient for moving after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a three-dimensional installation schematic diagram of the anti-tipping frame of the present application.

[0016] Figure 2 It is an exploded installation schematic diagram of the anti-tipping frame of the present application.

[0017] Figure 3 It is a bottom view installation schematic diagram of the anti-tipping frame of the present application.

[0018] Figure 4 It is a front view schematic diagram of the locking member of the present application.

[0019] Figure 5 It is a three-dimensional schematic diagram of the folded state of the wheelchair frame of the present application.

[0020] Figure 6 It is a three-dimensional schematic diagram of the unfolded state of the wheelchair frame of the present application.

[0021] Explanation of the reference numerals in the drawings: 1. Wheelchair frame; 11. Auxiliary wheel; 2. Motor frame; 21. Accommodating groove; 22. Positioning part; 221. Threaded hole; 23. Limit block; 3. Rear wheel; 4. Anti-tipping frame; 41. Anti-tipping wheel; 42. Round hole; 43. Limit groove; 5. Locking member; 51. Threaded section; 52. Abutting section. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection of the present application.

[0023] In the embodiments of the present application, please refer to Figure 1-6 As shown, the present application provides an adjustable anti-tipping wheel 41 mechanism for a wheelchair, which mainly includes: a wheelchair frame 1 that forms a folded state or an unfolded state by rotating the wheelchair frame 1; a motor frame 2 installed on the wheelchair frame 1, and a receiving groove 21 is opened on the motor frame 2, and a positioning portion 22 is installed in the receiving groove 21; an anti-tipping frame 4 is detachably installed with the positioning portion 22 through a locking member 5, and an anti-tipping wheel 41 is rotatably provided at one end thereof; the rear position of the anti-tipping wheel 41 is adjusted by changing the relative position between the anti-tipping frame 4 and the locking member 5.

[0024] Specifically, when the anti-tipping frame 4 needs to be adjusted, the anti-tipping frame 4 is temporarily disassembled through the locking member 5. When adjusted to the appropriate position, it is fixed again through the locking member 5, and the positioning portion 22 functions to fix and position, cooperate with the anti-tipping frame 4 and adjust the gear. Since it is installed on the motor frame 2, it will not shake randomly.

[0025] Next, some preferred / improved embodiments based on the above embodiments will be further elaborated. Any one or a combination of multiple of the following embodiments can be selected.

[0026] Refer to Figure 2 As shown, the positioning portion 22 is L-shaped, and a threaded hole 221 is opened at one end connected to the anti-tipping frame 4. In this way, the locking member 5 is installed on the positioning portion 22 through threaded connection, and this connection is more stable and reliable.

[0027] Refer to Figure 1 As shown, in order to prevent the anti-tipping frame 4 from shaking up and down, and thus fix one direction of the anti-tipping frame 4, a plurality of circular holes 42 are opened on both sides of the anti-tipping frame 4.

[0028] Refer to Figure 4As shown, the locking member 5 includes a threaded section 51 and an abutment section 52. When the locking member 5 is installed on the positioning portion 22, the threaded section 51 cooperates with the threaded hole 221, and the abutment section 52 passes through the circular hole 42. In this way, the locking member 5 can be fixed on the positioning portion 22 and limit the anti-roll frame 4 from shaking up and down, and makes removal and shifting easier.

[0029] Reference Figure 3 As shown, a limiting groove 43 is provided at the top of the anti-roll frame 4, and a plurality of limiting blocks 23 cooperating with the limiting groove 43 are provided at the bottom of the motor frame 2. In this way, the left and right movement of the anti-roll frame 4 will be limited by the limiting blocks 23, preventing the anti-roll frame 4 from escaping from the locking piece 5 and falling off, and ensuring that the anti-roll frame 4 can be stably fixed under the motor frame 2.

[0030] Preferably, the positioning portion 22 is installed on the inner wall of the accommodating groove 21 by threaded connection. In this way, the positioning portion 22 can be installed on the motor frame 2 more stably without shaking.

[0031] Reference Figure 5 As shown, a rear wheel 3 is rotatably provided on one side of the motor frame 2, an auxiliary wheel 11 is provided on the wheelchair frame 1, the anti-tip wheel 41 is arranged at the shortest rear distance and in the folded state, the auxiliary wheel 11 and the anti-tip wheel 41 and the rear wheel 3 are all kept tangent to the ground. With this arrangement, the movement of the wheelchair frame 1 in the folded state becomes simpler and easier.

[0032] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An adjustable anti-tipping wheel mechanism for a wheelchair, characterized in that, Comprising: A wheelchair frame that forms a folded state or an unfolded state by rotating the wheelchair frame; A motor mount installed on the wheelchair frame, with a receiving groove formed on the motor mount, and a positioning portion installed in the receiving groove; An anti-tipping frame detachably installed with the positioning portion through a locking member, and an anti-tipping wheel is rotatably provided at one end thereof; The rearward distance of the anti-tipping wheel is adjusted by changing the relative position between the anti-tipping frame and the locking member.

2. The adjustable anti-tipping wheel mechanism of the wheelchair according to claim 1, characterized in that, The positioning portion is L-shaped, and a threaded hole is formed at one end connected to the anti-tipping frame.

3. The adjustable anti-tipping wheel mechanism of the wheelchair according to claim 2, characterized in that, A plurality of round holes are formed on both sides of the anti-tipping frame.

4. The adjustable anti-tipping wheel mechanism of the wheelchair according to claim 3, characterized in that, The locking member includes a threaded section and an abutting section. When the locking member is installed on the positioning portion, the threaded section cooperates with the threaded hole, and the abutting section penetrates through the round hole.

5. The adjustable anti-tipping wheel mechanism of the wheelchair according to claim 1, characterized in that, A limiting groove is formed at the top of the anti-tipping frame, and a plurality of limiting blocks cooperating with the limiting groove are provided at the bottom of the motor mount.

6. The adjustable anti-tipping wheel mechanism of the wheelchair according to claim 1, characterized in that, The positioning portion is installed on the inner wall of the receiving groove through threaded connection.

7. The adjustable anti-tipping wheel mechanism of the wheelchair according to claim 1, characterized in that, A rear wheel is rotatably provided on one side of the motor mount, an auxiliary wheel is provided on the wheelchair frame. When the rearward distance of the anti-tipping wheel is the shortest and in the folded state, the auxiliary wheel, the anti-tipping wheel and the rear wheel are all tangent to the ground.

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