Stair climbing wheelchair auxiliary turning device

Abstract

The utility model relates to the field of stair -climbing wheelchair, concretely relates to stair -climbing wheelchair auxiliary turning device, including support seat and install two universal wheels at support seat bottom, support seat detachable installation is on the front wheel, and two universal wheels are located at the outer edge both sides of front wheel respectively, when support seat installs on the front wheel, the bottom of front wheel is higher than the bottom of universal wheel compared with horizontal plane, this stair -climbing wheelchair auxiliary turning device, through support seat connects universal wheel with front wheel, and just can move stair -climbing wheelchair through the rotation of universal wheel, and universal wheel rotation radius is smaller, guarantees its to be able to use on the narrow stair platform.

Description

Technical Field

[0001] This utility model relates to the field of stair-climbing wheelchairs, specifically to a stair-climbing wheelchair auxiliary turning device. Background Technology

[0002] When using a stair-climbing wheelchair on stairs, the narrow stair platforms in older residential areas limit the wheelchair's turning radius. Existing stair-climbing wheelchairs often have large front wheels and swivel rear wheels, resulting in a large turning radius as the front wheels cannot rotate. Therefore, a turning assist device for stair-climbing wheelchairs is needed to enable turning on narrow stair platforms. Utility Model Content

[0003] The purpose of this invention is to provide a turning assist device for stair-climbing wheelchairs.

[0004] To achieve this objective, the present invention adopts the following technical solution: A stair-climbing wheelchair-assisted turning device is provided, including a support base and two casters mounted on the bottom of the support base. The support base is detachably mounted on the front wheel, and the two casters are located on the outer edges of the front wheel respectively. When the support base is mounted on the front wheel, the bottom of the front wheel is higher than the bottom of the casters relative to the horizontal plane.

[0005] Furthermore, there are two support seats, and each support seat is detachably mounted on the front wheel.

[0006] Furthermore, the support base includes two side plates and two base plates, each base plate being fixedly connected to the bottom of the two side plates, the outer edge of the front wheel contacting the inner side of the two base plates, and two omnidirectional wheels being fixedly installed on the two base plates respectively.

[0007] Furthermore, the inner sides of the two side panels fit snugly against the sides of the front wheel.

[0008] Furthermore, it also includes a pin that connects the two side plates and fits against the inner rim of the front wheel hub.

[0009] Furthermore, there are two pins, both of which fit into the inner rim of the front wheel hub.

[0010] Furthermore, one end of the pin is equipped with a retractable steel ball, and the other end of the pin is equipped with a pull ring.

[0011] Furthermore, an observation notch for observing the front wheel frame begins to appear in the middle of the support base.

[0012] Furthermore, the support base is provided with an observation hole for observing the front tires.

[0013] The beneficial effects of this utility model are as follows: This stair-climbing wheelchair auxiliary turning device connects the omnidirectional wheel to the front wheel through the support base, so that the stair-climbing wheelchair can be moved by rotating the omnidirectional wheel. The omnidirectional wheel has a small rotation radius, which ensures that it can be used on narrow stair platforms. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the installation state of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the installation state of this utility model. Figure 2 ; Figure 3 This is a three-dimensional structural diagram of the present invention; In the diagram: 1. Front wheel; 1a. Inner ring of wheel hub; 2. Support base; 2a. Side plate; 2b. Observation notch; 2c. Observation hole; 2e. Base plate; 3. Caster wheel; 4. Pin; 4a. Pull ring; 4b. Steel ball. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0018] Reference Figures 1 to 3 The stair-climbing wheelchair assistive turning device shown includes a support base 2 and two casters 3 mounted on the bottom of the support base 2. The support base 2 is detachably mounted on the front wheel 1, and the two casters 3 are located on either side of the outer edge of the front wheel 1. When the support base 2 is mounted on the front wheel 1, the bottom of the front wheel 1 is higher than the bottom of the casters 3 relative to the horizontal plane. When going up or down stairs, the front wheel 1 is engaged in the support base 2, and the casters 3 replace the front wheel 1 in contact with the ground. At this time, when the entire front wheel of the wheelchair rotates, the stair-climbing wheelchair can be moved by rotating the casters 3. The small radius of rotation of the casters 3 ensures that it can be used on narrow stair platforms.

[0019] There are two support seats 2, and each support seat 2 is detachably mounted on the front wheel 1. There are generally two front wheels 1, which are engaged and rotated by the two support seats 2.

[0020] The support base 2 includes two side plates 2a and two base plates 2e. Each base plate 2e is fixedly connected to the bottom of the two side plates 2a. The outer edge of the front wheel 1 contacts the inner side of the two base plates 2e, and two omnidirectional wheels 3 are fixedly installed on the two base plates 2e respectively. The bottom of the front wheel 1 is supported by the two base plates 2e, while the two side plates 2a provide lateral restraint, ensuring that the front wheel 1 can be stably locked onto the support base 2. This allows for a detachable connection between the support base 2 and the front wheel 1.

[0021] The inner sides of the two side plates 2a fit against the two sides of the front wheel 1, ensuring greater stability when the support seat 2 is engaged with the front wheel 1.

[0022] It also includes a pin 4, which connects the two side plates 2a and fits against the inner ring 1a of the front wheel 1's hub. The pin 4 locks the support seat 2 and the front wheel 1 together, preventing the support seat 2 from separating from the front wheel 1 when it tilts upwards.

[0023] There are two pins 4, both of which are fitted into the inner rim 1a of the front wheel 1. Locking on both sides with the two pins 4 makes the connection more stable.

[0024] One end of the pin 4 is equipped with a retractable steel ball 4b, and the other end is equipped with a pull ring 4a. The steel ball 4b is ejected by a spring installed inside the pin 4, preventing it from being pulled out of the side plate 2a. The pull ring 4a facilitates the pulling out of the pin 4.

[0025] The support 2 has an observation notch 2b at the middle for observing the front wheel 1 frame.

[0026] The support base 2 has an observation hole 2c for observing the front wheel 1 tire. The observation notch 2b and the observation hole 2c are used to observe whether the front wheel 1 is properly engaged with the support base 2.

[0027] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A stair-climbing wheelchair-assisted turning device, characterized in that, Includes a support base (2) and two casters (3) installed at the bottom of the support base (2). The support base (2) is detachably installed on the front wheel (1). The two casters (3) are located on the outer sides of the front wheel (1). When the support base (2) is installed on the front wheel (1), the bottom of the front wheel (1) is higher than the bottom of the casters (3) relative to the horizontal plane.

2. The stair-climbing wheelchair-assisted turning device as described in claim 1, characterized in that, There are two support seats (2), and the two support seats (2) are detachably installed on the front wheel (1).

3. The stair-climbing wheelchair-assisted turning device as described in claim 1, characterized in that, The support base (2) includes two side plates (2a) and two base plates (2e). Each base plate (2e) is fixedly connected to the bottom of the two side plates (2a). The outer edge of the front wheel (1) contacts the inner side of the two base plates (2e). Two casters (3) are fixedly installed on the two base plates (2e).

4. The stair-climbing wheelchair-assisted turning device as described in claim 3, characterized in that, The inner sides of the two side plates (2a) are in contact with the two sides of the front wheel (1).

5. The stair-climbing wheelchair-assisted turning device as described in claim 3, characterized in that, It also includes a pin (4), which is connected between the two side plates (2a) and fits against the inner ring (1a) of the front wheel (1) hub.

6. The stair-climbing wheelchair-assisted turning device as described in claim 1, characterized in that, There are two pins (4), and both pins (4) are fitted to the inner ring (1a) of the hub of the front wheel (1).

7. The stair-climbing wheelchair-assisted turning device as described in claim 3, characterized in that, One end of the pin (4) is provided with a retractable steel ball (4b), and the other end of the pin (4) is provided with a pull ring (4a).

8. The stair-climbing wheelchair-assisted turning device as described in claim 1, characterized in that, The support (2) has an observation notch (2b) at the middle for observing the front wheel (1) frame.

9. The stair-climbing wheelchair-assisted turning device as described in claim 1, characterized in that, The support base (2) has an observation hole (2c) for observing the front wheel (1) tire.

Images