Quick dismounting structure and wheelchair

Abstract

The present disclosure provides a quick disassembly structure and a wheelchair. A quick disassembly structure is applied to a wheelchair, the wheelchair comprising a frame tube and a wheel, the quick disassembly structure comprising: a wheel shaft, a first end of which is detachably connected with a hub of the wheel; an adjustable knob mechanism for locking or unlocking the wheel shaft; the adjustable knob mechanism comprising a knob screw and a knob handle assembly, a first end of the knob screw being threadedly connected with a second end of the wheel shaft, and a second end of the knob screw being detachably connected with the knob handle assembly. The quick disassembly structure of the present application can realize locking or unlocking of the wheel shaft through the adjustable knob mechanism, and the wheel shaft is connected with the hub of the wheel, thereby facilitating the user to install the wheel and also reducing the disassembly difficulty. Moreover, the whole quick disassembly structure has few parts, so that the cost is lower and the processing difficulty is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of wheel quick-assembly technology, and more particularly to a quick-assembly structure and wheelchair. Background Technology

[0002] For elderly people with limited mobility or patients with temporary functional impairments, wheelchairs are indispensable assistive tools in daily life. Among the challenges, the installation of wheels for manual wheelchairs is one of the problems that troubles users. Currently, the industry uses quick-release axles to achieve rapid assembly of the handwheels, but this structure is relatively complex and requires high precision. Other methods use screw installation, but this method makes disassembly and assembly difficult for users and requires high installation torque. If the installation torque on both sides is different, it will cause the wheelchair to tilt to one side during pushing. Utility Model Content

[0003] This disclosure provides a quick-assembly and disassembly structure and wheelchair to at least address one of the technical problems existing in the prior art.

[0004] In a first aspect, this application provides a quick-assembly / disassembly structure for use in a wheelchair, the wheelchair including a frame tube and wheels, the quick-assembly / disassembly structure comprising:

[0005] The axle, with its first end detachably connected to the hub of the wheel;

[0006] An adjustable knob mechanism is used to lock or unlock the axle; the adjustable knob mechanism includes a knob screw and a knob handle assembly, the first end of the knob screw is threaded to the second end of the axle, and the second end of the knob screw is detachably connected to the knob handle assembly.

[0007] In one embodiment, the knob handle assembly includes a knob handle, a first end of which has an inner retaining tooth; and a second end of the knob screw has an outer retaining tooth, the inner retaining tooth engaging with the outer retaining tooth.

[0008] In one embodiment, the knob handle assembly further includes an adjusting screw, the end of which passes through the knob handle and is threaded to a second end of the knob screw.

[0009] In one embodiment, the knob handle assembly further includes an elastic element, and a receiving hole is provided on the knob handle. The elastic element is received in the receiving hole and sleeved on the outside of the adjusting screw.

[0010] In one embodiment, the quick-release structure further includes a locking member, which is sleeved on the outside of the frame tube. The second end of the wheel axle passes through the locking member and the frame tube in sequence and is threadedly connected to the first end of the knob screw. The locking member is used to restrict the rotation of the wheel axle.

[0011] In one embodiment, the axle is provided with a protrusion, and the locking member is provided with baffles on both sides, the baffles being located on the outside of the protrusion to prevent the axle from rotating.

[0012] In one embodiment, an anti-detachment hook assembly is further included, which is rotatably connected to the frame tube and is used to prevent the adjustable knob mechanism from rotating.

[0013] In one embodiment, the anti-detachment hook assembly includes: a hook rotatably connected to the frame tube, the hook having a limiting hole for limiting the rotation of the knob handle.

[0014] In one embodiment, the anti-detachment hook assembly further includes: limiting points, disposed on both sides of the connection rotation point between the hook and the frame tube, the limiting points being used to lock with the frame tube to restrict the movement of the hook.

[0015] Secondly, this application also provides a wheelchair, including a frame tube and a wheel, the wheel having a hub, and further including a quick-release structure as described in any of the above embodiments; the hub is detachably connected to the axle of the quick-release structure.

[0016] Compared with the prior art, the advantages of this application are as follows: 1) The quick-release structure of this application, through the setting of an adjustable knob mechanism, can lock or unlock the wheel axle, wherein the wheel axle is connected to the hub of the wheel, thereby facilitating the user's wheel installation and reducing the difficulty of disassembly and assembly. Moreover, the entire quick-release structure has fewer parts, making it lower in cost and reducing the difficulty of processing. 2) This application can achieve the locking and disassembly of the wheel axle by setting an adjustable knob mechanism including a knob screw and a knob handle assembly, thereby making wheel installation convenient and improving installation efficiency.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0018] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:

[0019] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0020] Figure 1A schematic diagram of the structure of a wheelchair according to an embodiment of the present disclosure is shown;

[0021] Figure 2 A schematic diagram of a structure in which a wheel, a frame tube, and a quick-release structure are connected according to an embodiment of the present disclosure is shown.

[0022] Figure 3 This illustration shows another structural diagram of the connection between the wheel, frame tube and quick-release structure according to an embodiment of the present disclosure;

[0023] Figure 4 A schematic diagram of another structure showing the connection between the wheel, frame tube and quick-release structure according to an embodiment of the present disclosure is shown;

[0024] Figure 5 A schematic diagram of an adjustable knob mechanism according to an embodiment of the present disclosure is shown;

[0025] Figure 6 Another structural schematic diagram of the adjustable knob mechanism according to an embodiment of the present disclosure is shown;

[0026] Figure 7 It shows Figure 6 A sectional view along the AA direction;

[0027] Figure 8 A schematic diagram of yet another structure of the adjustable knob mechanism according to an embodiment of the present disclosure is shown;

[0028] Figure 9 It shows Figure 8 A sectional view along the BB direction;

[0029] Figure 10 A schematic diagram of another structure connecting the wheel, frame tube and quick-release structure according to an embodiment of the present disclosure is shown;

[0030] Figure 11 It shows Figure 10 A cross-sectional view along the CC direction.

[0031] The numbers in the diagram are explained as follows: 1-Quick disassembly structure, 2-Frame tube, 3-Wheel, 4-Wheelchair, 11-Axle, 12-Adjustable knob mechanism, 13-Nut, 14-Locking component, 15-Anti-detachment hook assembly, 16-Washer, 31-Hollow, 111-Protrusion, 121-Knob screw, 122-Knob handle assembly, 123-Knob handle, 124-Adjusting screw, 125-Elastic component, 141-Side guard, 151-Hook, 152-Limiting point, 1511-Limiting hole, 1211-Outer locking tooth, 1231-Inner locking tooth, 1232-Accommodation hole. Detailed Implementation

[0032] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0033] Firstly, such as Figure 1-4 , Figure 10-11 As shown, this application provides a quick-assembly / disassembly structure 1 applied to a wheelchair 4, the wheelchair 4 including a frame tube 2 and wheels 3, the quick-assembly / disassembly structure 1 including:

[0034] The first end of the axle 11 is detachably connected to the hub 31 of the wheel 3;

[0035] An adjustable knob mechanism 12 is used to lock or unlock the axle 11. The adjustable knob mechanism 12 includes a knob screw 121 and a knob handle assembly 122. The first end of the knob screw 121 is threadedly connected to the second end of the axle 11, and the second end of the knob screw 121 is detachably connected to the knob handle assembly 122.

[0036] For example, wheel 3 includes a wheel body and a hub 31 connected to the wheel body. The first end of axle 11 passes through hub 31 and is locked at the end by nut 13. Axle 11 and hub 31 are coaxially arranged, and hub 31 can rotate around axle 11 in the circumferential direction. Hub 31 rotates relative to frame tube 2 via axle 11. Hub 31 is an important component of the wheel. A bearing is provided inside the hub shell, and axle 11 is installed in the bearing, thereby enabling hub 31 to rotate around axle 11.

[0037] The quick-release structure 1 of this application, through the setting of an adjustable knob mechanism 12, can lock or unlock the wheel axle 11, wherein the wheel axle 11 is connected to the hub 31 of the wheel 3, thereby facilitating the user's wheel installation and reducing the difficulty of disassembly and assembly. Moreover, the quick-release structure 1 has fewer parts, making it lower in cost and reducing the difficulty of processing.

[0038] In one possible implementation, such as Figure 5-9 As shown, the knob handle assembly 122 includes a knob handle 123, the first end of which has an inner retaining tooth 1231; the second end of the knob screw 121 has an outer retaining tooth 1211, and the inner retaining tooth 1231 engages with the outer retaining tooth 1211.

[0039] Specifically, such as Figure 7 , Figure 9As shown, the first end of the knob handle 123 has a connecting hole, and an inner retaining tooth 1231 is circumferentially formed on the inner surface of the connecting hole. An outer retaining tooth 1211 is machined on the outer surface of the second end of the knob screw 121. The second end of the knob screw 121 is located in the connecting hole of the knob handle 123, so that the inner retaining tooth 1231 and the outer retaining tooth 1211 mesh with each other. When the knob handle 123 rotates, it can synchronously drive the knob screw 121 to rotate, thereby tightening the second end of the wheel axle 11.

[0040] For example, such as Figure 9 As shown, the knob handle assembly 122 also includes an adjusting screw 124, the end of which passes through the knob handle 123 and is threadedly connected to the second end of the knob screw 121. Specifically, the adjusting screw 124 has an external thread, and the second end of the knob screw 121 has an internal thread that matches the external thread, so that the adjusting screw 124 and the knob screw 121 are threadedly connected.

[0041] Furthermore, such as Figure 9 As shown, the knob handle assembly 122 also includes an elastic element 125. A receiving hole 1232 is provided on the knob handle 123, and the elastic element 125 is received in the receiving hole 1232 and sleeved on the outside of the adjusting screw 124. When the knob handle 123 tightens the axle 11 through the knob screw 121, the knob handle 123 is pulled away from the knob screw 121, causing the inner retaining tooth 1231 of the knob handle 123 to disengage from the outer retaining tooth 1211 of the knob screw 121. At this time, the adjusting screw 124 is received in the receiving hole 1232 and compresses the elastic element 125. Because the adjusting screw 124 is threadedly connected to the knob screw 121, the knob handle 123 can rotate automatically around the adjusting screw 124. Then, when it is necessary to engage the knob handle 123 with the knob screw 121, simply align the inner teeth of the knob handle with the outer teeth of the knob screw. Under the elastic force of the elastic element, the knob handle 123 is driven to move closer to the knob screw 121, thereby re-engaging the inner and outer teeth. Thus, this application can achieve locking and disassembly of the wheel axle 11 through the adjustable knob mechanism 12 including the knob screw 121 and the knob handle assembly 122, thereby making the installation of the wheel 3 convenient and improving installation efficiency.

[0042] In one possible implementation, such as Figure 2 , Figure 11 As shown, the quick-release structure 1 also includes a locking member 14, which is sleeved on the outside of the frame tube 2. The second end of the wheel axle 11 passes through the locking member 14 and the frame tube 2 in sequence and is threadedly connected to the first end of the knob screw 121. The locking member 14 is used to restrict the rotation of the wheel axle 11.

[0043] For example, such as Figure 4 , Figure 11 As shown, the axle 11 has a protrusion 111, and the locking member 14 has a retaining edge 141 on both sides. The retaining edge 141 is located on the outside of the protrusion 111 to prevent the axle 11 from rotating.

[0044] For example, the protrusion 111 can be a hexagonal shoulder fitted onto the outside of the axle 11. The locking member 14 at the hexagonal shoulder position has flanges 141 on both sides, which can lock the axle 11 from rotating.

[0045] For example, such as Figure 11 As shown, the frame tube 2 has a connecting hole for the wheel axle 11 to be movably inserted.

[0046] For example, such as Figure 2 As shown, a washer 16 is also provided between the knob screw 121 and the locking member 14, which further strengthens the solid connection between the wheel axle 11 and the knob screw 121.

[0047] In one possible implementation, such as Figure 2-3 The quick-release structure 1 of this application also includes an anti-detachment hook assembly 15, which is rotatably connected to the frame tube 2 and is used to prevent the adjustable knob mechanism 12 from rotating.

[0048] For example, such as Figure 2-3 , Figure 11 As shown, the anti-detachment hook assembly 15 includes a hook 151, which is rotatably connected to the frame tube 2. The hook 151 has a limiting hole 1511, which is used to limit the rotation of the knob handle 123. After the knob handle 123 is locked to the wheel axle 11 by the knob screw 121, the position of the adjustment knob handle 123 can be adjusted so that it is set in the vertical direction. Then, the hook 151 is rotated so that the limiting hole 1511 on it passes through the knob handle 123, thereby locking the rotation of the knob handle 123.

[0049] Furthermore, such as Figure 3 As shown, the anti-detachment hook assembly 15 further includes two limiting points 152, respectively located on both sides of the connection rotation point between the hook 151 and the frame tube 2. The limiting points 152 are used to lock with the frame tube 2 to restrict the movement of the hook 151. The hook 151 is rotatably connected to the frame tube 2 via a pivot. Protrusions extend outward from the hook 151 on both sides of the pivot; these protrusions are the limiting points 152. When it is necessary to unlock the knob handle, the hook 151 is pushed upward, causing the limiting points 152 to press against the frame tube wall, thereby allowing the hook 151 to fit against the frame tube wall and restricting its movement.

[0050] Secondly, such as Figure 1As shown, this application also provides a wheelchair 4, including a frame tube 2 and a wheel 3. The wheel 3 has a hub 31 and also includes the aforementioned quick-release structure 1. The hub 31 is rotatably connected to the wheel axle 11 of the quick-release structure 1. The quick-release structure 1 of this application enables the wheel 3 to be installed quickly and conveniently, and allows the wheel to rotate relative to the frame tube.

[0051] The following provides a more detailed explanation of the installation and disassembly of the quick-release structure 1, the wheel 3, and the frame tube 2 in this application:

[0052] Installation process: Pass the first end of the axle 11 through the hub 31 of the wheel 3 and lock the first end of the axle 11 with the nut 13. Then, pass the second end of the axle 11 through the locking part 14 and the connecting hole on the frame tube 2 in sequence. Thread the knob screw 121 of the adjustable knob mechanism 12 to the second end of the axle 11. Rotate the knob handle 123 to rotate the knob screw 121 in sync, thereby tightening the second end of the axle 11.

[0053] Pull the knob handle 123 backward away from the knob screw 121. The inner retaining tooth 1231 of the knob handle 123 disengages from the outer retaining tooth 1211 of the knob screw 121. At this time, the elastic element 125 is compressed, and the adjusting screw 124 is housed in the receiving hole 1232. The knob handle 123 can rotate freely around the adjusting screw 124. Rotate the knob handle 123 to a vertical position and engage the inner retaining tooth 1211 with the knob screw 121. With the outer teeth aligned, the knob handle is released, and under the elastic force of the elastic element 125, the knob handle 123 is pushed towards the knob screw 121. At this time, the inner teeth 1231 of the knob handle 123 re-engage with the outer teeth 1211 of the knob screw 121. Then, the hook 151 is pulled down, and the limiting hole 1511 on the hook 151 passes through the knob handle 123, preventing the knob handle 123 from rotating, thereby completing the installation of the wheel 3.

[0054] Disassembly process: Push the hook 151 upwards to lock its limiting point 152 with the frame tube 2, preventing the hook 151 from moving. At this time, the limiting hole 1511 of the hook 151 disengages from the knob handle 123. Then rotate the knob handle 123 in the opposite direction to disengage the knob screw 121 from the axle 11. Then rotate the nut 13 to release the locking of the axle 11, remove the hub 31 of the wheel 3 from the axle 11, and finally remove the axle 11 from the frame tube 2.

[0055] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] The terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise expressly and specifically defined.

[0058] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A quick-assembly / disassembly structure (1) applied to a wheelchair (4), the wheelchair (4) comprising a frame tube (2) and wheels (3), characterized in that: The quick-assembly / disassembly structure (1) includes: The axle (11) is detachably connected at its first end to the hub (31) of the wheel (3); An adjustable knob mechanism (12) is used to lock or unlock the axle (11); the adjustable knob mechanism (12) includes a knob screw (121) and a knob handle assembly (122), the first end of the knob screw (121) is threaded to the second end of the axle (11), and the second end of the knob screw (121) is detachably connected to the knob handle assembly (122).

2. The quick-assembly and disassembly structure (1) according to claim 1, characterized in that: The knob handle assembly (122) includes a knob handle (123), the first end of which has an inner retaining tooth (1231); the second end of the knob screw (121) has an outer retaining tooth (1211), and the inner retaining tooth (1231) engages with the outer retaining tooth (1211).

3. The quick-assembly and disassembly structure (1) according to claim 2, characterized in that: The knob handle assembly (122) also includes an adjusting screw (124), the end of which passes through the knob handle (123) and is threaded to the second end of the knob screw (121).

4. The quick-assembly and disassembly structure (1) according to claim 3, characterized in that: The knob handle assembly (122) further includes an elastic element (125), and a receiving hole (1232) is provided on the knob handle (123). The elastic element (125) is received in the receiving hole (1232) and sleeved on the outside of the adjusting screw (124).

5. The quick-assembly and disassembly structure (1) according to claim 1, characterized in that: The quick-release structure (1) also includes a locking member (14), which is sleeved on the outside of the frame tube (2). The second end of the wheel axle (11) passes through the locking member (14) and the frame tube (2) in sequence and is threaded to the first end of the knob screw (121). The locking member (14) is used to restrict the rotation of the wheel axle (11).

6. The quick-assembly and disassembly structure (1) according to claim 5, characterized in that: The axle (11) is provided with a protrusion (111), and the locking member (14) is provided with a retaining edge (141) on both sides. The retaining edge (141) is located on the outside of the protrusion (111) to prevent the axle (11) from rotating.

7. The quick-assembly and disassembly structure (1) according to any one of claims 1-6, characterized in that: It also includes an anti-detachment hook assembly (15), which is rotatably connected to the frame tube (2) and is used to prevent the adjustable knob mechanism (12) from rotating.

8. The quick-assembly and disassembly structure (1) according to claim 7, characterized in that: The anti-detachment hook assembly (15) includes: a hook (151), which is rotatably connected to the frame tube (2), and the hook (151) has a limiting hole (1511) for limiting the rotation of the knob handle (123).

9. The quick-assembly / disassembly structure (1) according to claim 8, characterized in that: The anti-detachment hook assembly (15) further includes: limiting points (152), which are located on both sides of the connection rotation point between the hook (151) and the frame tube (2), and the limiting points (152) are used to lock with the frame tube to restrict the movement of the hook.

10. A wheelchair comprising a frame tube (2) and wheels (3), said wheels (3) having hubs (31), characterized in that: It also includes the quick-release structure (1) as described in any one of claims 1-9; the hub (31) is detachably connected to the axle of the quick-release structure (1).

Images