Inflation-free wheel for wheelchair

Abstract

The inflation-free wheel comprises a hub and an inflation-free tire, the hub comprises a rim, a center seat and spokes connected between the center seat and the rim, a mounting groove is formed in the rim, the inner side portion of the inflation-free tire is clamped in the mounting groove, a plurality of spoke gaps are formed between the spokes and the rim, and the spoke gaps are communicated with the center seat. And a tire prying hole communicated with a spoke gap is formed in the rim. According to the inflation-free wheel for the wheelchair, even if the tire is punctured, the tire cannot be punctured immediately, so that the use continuity and stability are ensured. And due to the arrangement of the tire prying hole, a user can conveniently detach the non-pneumatic tire from the hub through a tool, and foreign matters such as broken stones and sand clamped between the pneumatic tire and the hub can be conveniently removed.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair wheels, in particular to a non-pneumatic wheel for a wheelchair. Background Art

[0002] The tires used in traditional electric wheelchairs include a rubber outer tire and a rubber inner tire. Before use, air needs to be filled into the inner tire through the valve, which has problems such as easy tire bursting, easy puncturing of the tire, and easy air leakage at the valve.

[0003] To solve the above problems, some non-pneumatic tires made of foamed polyurethane have emerged on the market. After installing these non-pneumatic tires on the wheel hub, they form non-pneumatic wheels. However, the following problems also exist during the use of these wheels: After the wheels are used for a period of time, gravel, sand and other objects often get stuck in the gap between the wheel hub and the tire. If these gravel and sand cannot be removed in time, it is easy to damage the surface of the non-pneumatic tire. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a non-pneumatic wheel for a wheelchair that is convenient for removing the tire for cleaning.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A non-pneumatic wheel for a wheelchair includes a wheel hub and a non-pneumatic tire. The wheel hub includes a rim, a center seat, and spokes connecting the center seat and the rim. An installation groove is provided on the rim, and the inner part of the non-pneumatic tire is clamped in the installation groove. A plurality of spoke gaps are formed between the spokes and the rim, and a tire levering hole communicating with one of the spoke gaps is provided on the rim.

[0007] In a preferred embodiment of the utility model, the non-pneumatic tire is a TPU tire.

[0008] In a preferred embodiment of the utility model, the wheel hub includes a front half wheel hub and a rear half wheel hub connected together by fasteners. The rim includes a front half rim provided on the front half wheel hub and a rear half rim provided on the rear half wheel hub. The spokes include front spokes provided on the front half wheel hub and rear spokes provided on the rear half wheel hub. The center seat includes a front seat provided on the front half wheel hub and a rear seat provided on the rear half wheel hub.

[0009] In a preferred embodiment of the utility model, an insertion and positioning structure is provided between the front half wheel hub and the rear half wheel hub.

[0010] In a preferred embodiment of the present utility model, the plug-in positioning structure includes a first plug provided on the front half hub and a first slot provided on the rear half hub and in plug-in cooperation with the first plug.

[0011] In a preferred embodiment of the present utility model, the plug-in positioning structure further includes a second slot provided on the front half hub and a second plug provided on the rear half hub and in plug-in cooperation with the second slot.

[0012] In a preferred embodiment of the present utility model, a first groove is provided on the rear side surface of the front half rim, and a second groove corresponding to the first groove is provided on the front side surface of the rear half rim. The first groove and the second groove together form the tire levering hole.

[0013] In a preferred embodiment of the present utility model, a plurality of anti-disengagement ribs are provided at intervals on the inner side wall of the installation groove.

[0014] The beneficial effects of the present utility model are as follows:

[0015] First, for the non-pneumatic wheel for wheelchair, even if the tire is punctured, it will not burst immediately, thus ensuring the continuity and stability of use. It solves the problems of air leakage and bursting of the tires of traditional electric wheelchairs and improves the service life.

[0016] Second, such a tire has good resilience performance, improving the comfort of driving.

[0017] Third, it is easy to maintain. The user does not need to worry about frequent tire replacement, reducing the use cost.

[0018] Fourth, the setting of the tire levering hole enables the user to easily remove the non-pneumatic tire from the hub by means of tools, facilitating the removal of foreign matters such as gravel and sand grains stuck between the pneumatic tire and the hub, which is beneficial to maintaining cleanliness and prolonging the service life of the wheel. Description of the Drawings

[0019] Figure 1 is the perspective view of the present utility model;

[0020] Figure 2 is the exploded view of the present utility model;

[0021] Figure 3 is the sectional view of the present utility model;

[0022] Figure 4 is the exploded view of the hub;

[0023] Figure 5 is the perspective view of the front half hub of the hub. Detailed Embodiments

[0024] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the present utility model are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly. In addition, the descriptions involving "preferred", "sub-preferred", etc. in the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "preferred" and "sub-preferred" may explicitly or implicitly include at least one such feature.

[0026] Referring to Figures 1 to 5 , the present utility model provides a non-pneumatic wheel for a wheelchair, which includes a wheel hub 1 and a non-pneumatic tire 2. The wheel hub 1 includes a rim 11, a center seat 12, and spokes 13 connecting the center seat 12 and the rim 11. A shaft hole is provided on the center seat 12, and an installation groove 111 is provided on the rim 11. The inner part of the non-pneumatic tire 2 is clamped in the installation groove 111. A plurality of spoke gaps 10 are formed between the spokes 13 and the rim 11, and a tire levering hole 112 communicating with one of the spoke gaps 10 is provided on the rim 11. When objects such as gravel and sand grains are stuck in the gap between the wheel hub 1 and the tire, an L-shaped tool, such as an L-shaped hexagon wrench or an L-shaped rod, can be used. One end of the tool is passed through the spoke gap 10 and inserted into the tire levering hole 112, and then the corresponding part of the non-pneumatic tire 2 can be lifted. At this time, a large gap will appear between the lifted part and the rim 11. Then, a tool such as a flat screwdriver can be inserted into this gap, and the non-pneumatic tire 2 can be levered off the wheel hub 1, facilitating the removal of gravel and sand grains from the non-pneumatic tire 2 and the wheel hub 1. After removing these gravel and sand grains, the non-pneumatic tire 2 can be installed on the wheel hub 1.

[0027] The tire body is made of foamed TPU material by a special foaming process and has good elasticity. The internal TPU foam particles are in the shape of popcorn, which can be called a TPU popcorn-filled tire. The density of the TPU popcorn-filled tire is only 0.18 g / mm3, and the resilience performance exceeds 70%. The wheel hub 1 is made of a hard plastic with relatively high strength, such as PP, PE, PA, and PC.

[0028] In an embodiment of the present utility model, the wheel hub 1 includes a front half wheel hub 101 and a rear half wheel hub 102 connected together by fasteners. The rim 11 includes a front half rim 113 provided on the front half wheel hub 101 and a rear half rim 114 provided on the rear half wheel hub 102. The spokes 13 include a front spoke 165 provided on the front half wheel hub 101 and a rear spoke 166 provided on the rear half wheel hub 102. The center seat 12 includes a front seat 121 provided on the front half wheel hub 101 and a rear seat 122 provided on the rear half wheel hub 102. The wheel hub 1 adopts a two-part splicing structure form, which is convenient for demolding during the injection molding process. The above-mentioned fasteners can adopt devices such as bolt assemblies, screw assemblies, and rivets. Preferably, the fasteners include multiple groups of bolt assemblies, and each group of bolt assemblies includes a bolt 31 and a nut 32.

[0029] In this embodiment, a first groove 161 is provided on the rear side surface of the front half rim 113, and a second groove 162 corresponding to the first groove 161 is provided on the front side surface of the rear half rim 114. The first groove 161 and the second groove 162 together enclose a tire lever hole 112.

[0030] In order to ensure the alignment of the front half wheel hub 101 and the rear half wheel hub 102 when they are connected together, an insertion positioning structure is provided between the front half wheel hub 101 and the rear half wheel hub 102. The insertion positioning structure includes a first insertion block 115 provided on the front half wheel hub 101, a first insertion slot 116 provided on the rear half wheel hub 102 and in insertion fit with the first insertion block 115, a second insertion slot 117 provided on the front half wheel hub 101, and a second insertion block 118 provided on the rear half wheel hub 102 and in insertion fit with the second insertion slot 117.

[0031] Furthermore, a plurality of anti-detachment ribs 163 are provided at intervals on the inner side wall of the mounting groove 111.

[0032] The above is only the preferred embodiment of the present utility model, and it does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A non-inflatable wheel for a wheelchair, characterized in that: The invention comprises a wheel hub (1) and a non-pneumatic tire (2), wherein the wheel hub (1) comprises a rim (11), a center seat (12), and spokes (13) connected between the center seat (12) and the wheel hub (11), wherein the wheel hub (11) is provided with a mounting groove (111), wherein the inner side of the non-pneumatic tire (2) is clamped in the mounting groove (111), wherein a plurality of spoke gaps (10) are formed between the spokes (13) and the wheel hub (11), and wherein the wheel hub (11) is provided with a tire prying hole (112) connected with one of the spoke gaps (10).

2. The air-free wheel for a wheelchair according to claim 1, characterized in that: The air-free tire (2) is a TPU tire.

3. The air-free wheel for a wheelchair according to claim 1, characterized in that: The wheel hub (1) comprises a front half wheel hub (101) and a rear half wheel hub (102) connected together by fasteners; the wheel rim (11) comprises a front half wheel rim (113) arranged on the front half wheel hub (101) and a rear half wheel rim (114) arranged on the rear half wheel hub (102); the spokes (13) comprise front spokes (165) arranged on the front half wheel hub (101) and rear spokes (166) arranged on the rear half wheel hub (102); and the center seat (12) comprises a front seat (121) arranged on the front half wheel hub (101) and a rear seat (122) arranged on the rear half wheel hub (102).

4. The air-free wheel for a wheelchair according to claim 3, characterized in that: A plug-in positioning structure is provided between the front half wheel hub (101) and the rear half wheel hub (102).

5. The air-free wheel for a wheelchair according to claim 4, characterized in that: The plug-in positioning structure comprises a first plug-in block (115) arranged on the front half wheel hub (101), and a first slot (116) arranged on the rear half wheel hub (102) and pluggably matched with the first plug-in block (115).

6. The air-free wheel for a wheelchair according to claim 5, characterized in that: The plug-in positioning structure also includes a second slot (117) arranged on the front half wheel hub (101), and a second plug block (118) arranged on the rear half wheel hub (102) and pluggably matched with the second slot (117).

7. The air-free wheel for a wheelchair according to claim 3, characterized in that: A first groove (161) is arranged on the rear side surface of the front half wheel rim (113), and a second groove (162) corresponding to the first groove (161) is arranged on the front side surface of the rear half wheel rim (114); the first groove (161) and the second groove (162) together form the tire prying hole (112).

8. The air-free wheel for a wheelchair according to claim 1, characterized in that: A plurality of anti-slip ribs (163) are arranged at intervals on the inner side wall of the installation groove (111).

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