Spoked wheel of wheelchair

Abstract

The utility model discloses a spoked wheel of a wheelchair, which relates to the technical field of wheelchairs, and comprises a rim, a hub located in the center of the rim and spokes connecting the hub and the rim, each spoke is provided with an outer end and an inner end, the rim is provided with a rim through hole for the outer end to penetrate through, and the part of the outer end penetrating through the rim through hole is provided with a first clamping part. A first arc-shaped convex face is formed on the side, facing the inner end, of the first clamping part, the first arc-shaped convex face abuts against the rim penetrating hole, a first arc-shaped concave face matched with the first arc-shaped convex face is arranged at the contact position of the rim penetrating hole and the first arc-shaped convex face, a hub penetrating hole allowing the inner end to penetrate through is formed in the hub, and a second clamping part is arranged on the portion, penetrating through the hub penetrating hole, of the inner end. A second arc-shaped convex face is formed on the side, facing the outer end, of the second clamping part, the second arc-shaped convex face abuts against the hub penetrating hole, and the contact position of the hub penetrating hole and the second arc-shaped convex face is a second arc-shaped concave face matched with the second arc-shaped convex face. According to the utility model, non-uniform tension of the spokes is prevented, so that the rim or the hub is prevented from being broken.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to a spoke wheel of a wheelchair. Background Art

[0002] For example Figure 1 , the existing spoke wheel has a right angle between the rim 1' perforation and the abutment of one end of the spoke 3', and a right angle between the hub 2' perforation and the other end of the spoke 3'. The rim 1' perforation and the hub 2' perforation are not on the same plane. Therefore, the installed spokes 3' are obviously bent at the rim 1' perforation and the hub 2' perforation. When the spoke wheel is in use, due to the influence of the tension of the spokes 3', the abutment between the rim perforation 1' and the spoke 3' or the abutment between the hub perforation 2' and the spoke 3' is easy to break, resulting in uneven tension between the spokes 3' of the rim 1', thereby causing the rim 1' to deform, and causing the rim 1' and the spoke 3' to break when hit, thereby reducing the service life of the spoke wheel. Utility Model Content

[0003] The utility model aims to provide a spoke wheel for a wheelchair, which can prevent the wheel rim from being pierced or the hub from being pierced and the spokes from being broken, and prevents uneven tension between the spokes.

[0004] To achieve the above objectives, the solution of the utility model is:

[0005] A spoke wheel of a wheelchair comprises a rim, a hub located at the center of the rim, and spokes connecting the hub and the rim, the spokes having an outer end and an inner end, the rim being provided with a rim through-hole for the outer end to pass through, a portion of the outer end passing through the rim through-hole being provided with a first clamping portion, the first clamping portion forming a first arcuate convex surface towards the inner end, the first arcuate convex surface pressing against the rim through-hole, a contact portion between the rim through-hole and the first arcuate convex surface being a first arcuate concave surface matching the first arcuate convex surface, a hub being provided with a hub through-hole for the inner end to pass through, a portion of the inner end passing through the hub through-hole being provided with a second clamping portion, the second clamping portion forming a second arcuate convex surface towards the outer end, the second arcuate convex surface pressing against the hub through-hole, and a contact portion between the hub through-hole and the second arcuate convex surface being a second arcuate concave surface matching the second arcuate convex surface.

[0006] Furthermore, the spokes are coaxial with the hub holes and rim holes through which they penetrate.

[0007] Furthermore, both ends of the hub protrude axially from the plane where the rim is located, forming a trumpet-shaped first end and a second end respectively, and the hub hole is arranged on the side wall of the first end or the second end, and the hub hole is perpendicular to the side wall of the first end or the second end.

[0008] Furthermore, there are multiple spokes, rim holes and hub holes, one rim hole is provided on the rim corresponding to each spoke, and one hub hole is provided on the hub corresponding to each spoke.

[0009] Furthermore, the rim perforation includes a first rim perforation and a second rim perforation, the first rim perforation and the second rim perforation are oblique holes spaced apart from each other on the inner side of the rim, the first rim perforation is inclined toward the hub perforation at the first end, the axes of the first rim perforation, the spokes and the hub perforation at the first end are located on the same straight line, the second rim perforation is inclined toward the hub perforation at the second end, the axes of the second rim perforation, the spokes and the hub perforation at the second end are located on the same straight line.

[0010] Furthermore, a first spoke cap is provided on the outer end, a nut is threaded on the first spoke cap, a first clamping portion is integrally formed at the lower end of the nut, so that when the nut is rotated inwardly, the first arcuate convex surface of the first clamping portion is driven to press against the first arcuate concave surface of the rim rotating hole; a second spoke cap is provided on the inner end, the second clamping portion is integrally formed on the second spoke cap, and the inward rotation of the nut drives the spoke to move toward the rim perforation, so as to drive the second arcuate convex surface of the second clamping portion to press against the second arcuate concave surface of the hub perforation.

[0011] Furthermore, the curvature of the second arc-shaped concave surface is smaller than the curvature of the first arc-shaped concave surface.

[0012] Furthermore, the rim is provided with a rim outer layer, which is arranged on the side of the first engaging portion away from the inner end, and a clearance hole is opened on the rim outer layer at a position corresponding to the rim perforation, and the diameter of the clearance hole is larger than the diameter of the rim perforation.

[0013] After adopting the above scheme, the beneficial effects of the utility model are:

[0014] The utility model sets the mutual contact position of the first engaging part and the wheel rim perforation as the first arcuate convex surface and the first arcuate concave surface which fit each other, when the first arcuate convex surface is pressed against the wheel rim perforation, the first arcuate convex surface fits with the first arcuate concave surface, and sets the mutual contact position of the second engaging part and the hub perforation as the second arcuate convex surface and the second arcuate concave surface which fit each other, when the second arcuate convex surface is pressed against the hub perforation, the second arcuate convex surface fits with the second arcuate concave surface, thereby forming The arcuate surfaces of the rim perforations and the hub perforations contact with the spokes, thereby preventing the hub perforations or the contact between the rim perforations and the spokes from breaking, thereby preventing the rim, hub and spoke breakage caused by uneven spoke tension, and also preventing the rim from being insufficiently round, thereby enhancing the overall strength of the rim, making the rim less likely to deform, and increasing the service life of the rim, and through the arcuate surfaces of the rim perforations and the hub perforations contact with the spokes, the spokes can adaptively adjust their positions when vibrating. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the rim, hub and spokes of an existing spoke wheel;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 It is a sectional view of the overall structure of the utility model;

[0018] Figure 4 yes Figure 3 Enlarged view of part A in the middle;

[0019] Figure 5 yes Figure 3 Enlarged view of middle part B;

[0020] Figure 6 The utility model is a rim section Figure 1 ;

[0021] Figure 7 yes Figure 6 Enlarged view of middle C;

[0022] Figure 8 The utility model is a rim section Figure 2 ;

[0023] Fig. 9 yes Figure 8 Enlarged view of the middle D part;

[0024] Fig.10 It is a cross-sectional view of the hub of the utility model;

[0025] Fig.11 It is a schematic diagram of the spoke structure of the utility model;

[0026] Fig.12 It is a schematic diagram of the axis of the wheel rim perforation and the hub perforation of the utility model;

[0027] Fig.13 It is a schematic diagram of the rim perforation, hub perforation and spoke axis of the utility model.

[0028] Description of labels:

[0029] The rim 10, the rim perforation 11, the first rim perforation 111, the second rim perforation 112, the first arcuate concave surface 12, the rim outer layer 13, the clearance hole 131, the hub 20, the hub perforation 21, the second arcuate concave surface 22, the first end 23, the second end 24, the spoke 30, the inner end 31, the second engaging portion 311, the second arcuate convex surface 312, the second spoke cap 313, the outer end 32, the first engaging portion 321, the first arcuate convex surface 322, the first spoke cap 323, and the nut 33. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 2 to 13 As shown, the utility model provides a spoke wheel for a wheelchair, comprising a rim 10, a hub 20 located at the center of the rim 10, and a spoke 30 connecting the hub 20 and the rim 10, the spoke 30 having an outer end 32 and an inner end 31, the rim 10 is provided with a rim through-hole 11 for the outer end 32 to pass through, the portion of the outer end 32 passing through the rim through-hole 11 is provided with a first engaging portion 321, the first engaging portion 321 forms a first arcuate convex surface 322 toward the side of the inner end 31, the first arcuate convex surface 322 is pressed against the rim through-hole 11, and the contact portion between the rim through-hole 11 and the first arcuate convex surface 322 is a first arcuate convex surface 322 that fits the first arcuate convex surface 322. The hub 20 is provided with a hub hole 21 for the inner end 31 to pass through, and the part of the inner end 31 passing through the hub hole 21 is provided with a second clamping portion 311, and the second clamping portion 311 forms a second arcuate convex surface 312 on the side facing the outer end 32, and the second arcuate convex surface 312 is tightly pressed against the hub hole 21, and the contact point between the hub hole 21 and the second arcuate convex surface 312 is a second arcuate concave surface 22 that fits the second arcuate convex surface 312; specifically, the first arcuate concave surface 12 is formed on the rim hole 11 by punching a nest, and similarly, the second arcuate concave surface 22 is also formed on the hub hole 21 by punching a nest.

[0032] The utility model sets the mutual contact position of the first engaging portion 321 and the wheel rim perforation 11 as the first arcuate convex surface 322 and the first arcuate concave surface 12 which fit each other, when the first arcuate convex surface 322 is pressed against the wheel rim perforation 11, the first arcuate convex surface 322 fits with the first arcuate concave surface 12, and sets the mutual contact position of the second engaging portion 311 and the hub perforation 21 as the second arcuate convex surface 312 and the second arcuate concave surface 22 which fit each other, when the second arcuate convex surface 312 is pressed against the hub perforation 21, the second arcuate convex surface 312 fits with the second arcuate concave surface 22, so that The rim perforations 11 and the hub perforations 21 are in contact with the spokes 30 at an arcuate surface, thereby preventing the hub perforations 21 or the contact points between the rim perforations 11 and the spokes 30 from breaking, thereby preventing the rim 10, the hub 20 and the spokes 30 from being broken due to uneven tension of the spokes 30, and also preventing the rim 10 from being insufficiently round, thereby enhancing the overall strength of the rim 10, making the rim 10 less likely to deform and increasing the service life of the rim 10, and through the arcuate surface contact between the rim perforations 11 and the hub perforations 21 and the spokes 30 at an contact point, the spokes 30 can adaptively adjust their positions during vibration.

[0033] Furthermore, the spokes 30 are coaxial with the hub holes 21 and the rim holes 11 through which they penetrate, so that the spokes 30 of the utility model are straight. When in use, the spokes 30 are only subjected to the tensile force in the direction of their extension, but not to the force perpendicular to or inclined to the spokes 30. Therefore, the spokes 30 are not easy to break, and have higher strength when in use, thereby increasing the service life of the rim 10, and can also support the rim 10, making the rim 10 not easily deformed.

[0034] Furthermore, both ends of the hub 20 protrude axially from the plane where the wheel rim 10 is located, respectively forming a trumpet-shaped outwardly expanded first end 23 and a second end 24, and the hub perforation 21 is arranged on the side wall of the first end 23 or the second end 24, and the position at which the hub perforation 21 is arranged is perpendicular to the hub perforation 21; specifically, the hub perforation 21 is perpendicular to the side wall of the first end 23 or the second end 24, so the hub perforation 21 is a straight hole formed on the side wall of the first end 23 or the second end 24, and the opening direction of the hub perforation 21 can be set according to the inclination degree of the side wall of the first end 23 or the second end 24, and the hub perforation 21 remains perpendicular to the side wall of the first end 23 or the second end 24 In the process of forming the hub perforation 21, the hub perforation 21 can be formed directly perpendicularly to the side wall of the first end 23 or the second end 24, which is more convenient than forming the hub perforation 21 obliquely. The hub perforation 21 formed perpendicularly to the side wall of the first end 23 or the second end 24 has the same inclination angle as the obliquely formed hub perforation 21. Since the hub 20 is relatively small in size, the obliquely formed hub perforation 21 will interfere with the hub 20, and the operating space is small, making the operation inconvenient. Therefore, the side wall perpendicular to the first end 23 or the second end 24 makes the formation of the hub perforation 21 more convenient, has a larger operating space, and does not interfere with the hub 20.

[0035] Specifically, a plurality of spokes 30 , rim holes 11 and hub holes 21 are provided. The rim 10 is provided with a rim hole 11 corresponding to each spoke 30 , and the hub 20 is provided with a hub hole 21 corresponding to each spoke 30 .

[0036] Specifically, the wheel rim perforation 11 includes a first wheel rim perforation 111 and a second wheel rim perforation 112. The first wheel rim perforation 111 and the second wheel rim perforation 112 are oblique holes spaced apart from each other on the inner side of the wheel rim 10. The first wheel rim perforation 111 is inclined toward the hub perforation 21 at the first end 23. The axes of the first wheel rim perforation 111, the spokes 30, and the hub perforation 21 at the first end 23 are located on the same straight line, so that the axes of the first wheel rim perforation 111, the spokes 30, and the hub perforation 21 at the first end 23 are aligned with the wheel rim 10. The plane of the rim 10 is inclined, the second rim hole 112 is inclined toward the hub hole 21 at the second end 24, and the axes of the second rim hole 112, the spoke 30 and the hub hole 21 at the second end 24 are located on the same straight line. Therefore, the axes of the second rim hole 112, the spoke 30 and the hub hole 21 at the second end 24 are also inclined with the plane where the rim 10 is located, so that the axis of the spoke 30, the plane where the rim 10 is located, and the axis of the hub 20 form a triangle, so that the support of the spoke 30 is more stable.

[0037] Furthermore, a first spoke cap 323 is provided on the outer end 32, and a nut 33 is screwed on the first spoke cap 323. The first clamping portion 321 is integrally formed at the lower end of the nut 33, so that when the nut 33 is rotated inwardly, the first arcuate convex surface 322 of the first clamping portion 321 is driven to press against the first arcuate concave surface 12 of the rotating hole of the rim 10. A second spoke cap 313 is provided on the inner end 31, and the second clamping portion 311 is integrally formed on the second spoke cap 313. The inward rotation of the nut 33 drives the spoke 30 to move toward the rim through-hole 11, so as to drive the second arcuate convex surface 312 of the second clamping portion 311 to press against the second arcuate concave surface 22 of the hub through-hole 21.

[0038] Specifically, the curvature of the second arc-shaped concave surface 22 is smaller than the curvature of the first arc-shaped concave surface 12 .

[0039] Furthermore, the rim 10 is also provided with a rim outer layer 13, which is arranged on the side of the first locking portion 321 away from the inner end 31, and a clearance hole 131 is opened on the rim outer layer 13 at a position corresponding to the rim perforation 11. The diameter of the clearance hole 131 is larger than the diameter of the rim perforation 11, so as to make way when the above-mentioned nut 33 is rotated inward or outward, which is convenient for disassembly and assembly of the spoke wheel, and also convenient for maintenance and replacement of the spokes, and the clearance hole 131 can also be avoided when the rim perforation 11 is formed and when the rim perforation 11 is punched to form the first arc-shaped concave surface 12, so as to facilitate the formation of the rim perforation 11 and the first arc-shaped concave surface 12.

[0040] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0041] Meanwhile, the directions such as front, back, left, and right involved in this embodiment are only used as a reference for directions and do not represent directions in actual use. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] The above description is only a preferred embodiment of the present utility model and is not a limitation on the design of the present case. Any equivalent changes made based on the key design of the present case shall fall within the protection scope of the present case.

Claims

1. A spoke wheel for a wheelchair, comprising a rim, a hub located at the center of the rim, and spokes connecting the hub and the rim, Features: The spoke has an outer end and an inner end, and the rim is provided with a rim through-hole for the outer end to pass through, and the portion of the outer end passing through the rim through-hole is provided with a first clamping portion, and the first clamping portion forms a first arcuate convex surface toward the inner end, and the first arcuate convex surface is pressed against the rim through-hole, and the contact between the rim through-hole and the first arcuate convex surface is a first arcuate concave surface that matches the first arcuate convex surface, and the hub is provided with a hub through-hole for the inner end to pass through, and the portion of the inner end passing through the hub through-hole is provided with a second clamping portion, and the second clamping portion forms a second arcuate convex surface toward the outer end, and the second arcuate convex surface is pressed against the hub through-hole, and the contact between the hub through-hole and the second arcuate convex surface is a second arcuate concave surface that matches the second arcuate convex surface.

2. The spoke wheel of a wheelchair as claimed in claim 1, Features: The spokes are coaxial with the holes in the hub and rim through which they are inserted.

3. The spoke wheel of a wheelchair as claimed in claim 2, Features: Both ends of the hub protrude axially from the plane where the wheel rim is located, forming a trumpet-shaped first end and a second end respectively. The hub hole is arranged on the side wall of the first end or the second end, and the hub hole is perpendicular to the side wall of the first end or the second end.

4. The spoke wheel of a wheelchair as claimed in claim 3, Features: A plurality of spokes, rim holes and hub holes are provided, one rim hole is provided on the rim corresponding to each spoke, and one hub hole is provided on the hub corresponding to each spoke.

5. The spoke wheel of a wheelchair as claimed in claim 4, Features: The rim perforations include a first rim perforation and a second rim perforation, the first rim perforations and the second rim perforations are oblique holes spaced apart from each other on the inner side of the rim, the first rim perforations are inclined toward the hub perforations at the first end, the axes of the first rim perforations, spokes and the hub perforations at the first end are located on the same straight line, the second rim perforations are inclined toward the hub perforations at the second end, the axes of the second rim perforations, spokes and the hub perforations at the second end are located on the same straight line.

6. The spoke wheel of a wheelchair as claimed in claim 1, Features: A first spoke cap is arranged on the outer end, a nut is screwed on the first spoke cap, a first clamping portion is integrally formed at the lower end of the nut, so that when the nut is rotated inwardly, the first arcuate convex surface of the first clamping portion is driven to press against the first arcuate concave surface of the rim rotating hole; a second spoke cap is arranged on the inner end, the second clamping portion is integrally formed on the second spoke cap, and the inward rotation of the nut drives the spoke to move toward the rim perforation, so as to drive the second arcuate convex surface of the second clamping portion to press against the second arcuate concave surface of the hub perforation.

7. The spoke wheel of a wheelchair as claimed in claim 1, Features: The curvature of the second arc-shaped concave surface is smaller than the curvature of the first arc-shaped concave surface.

8. The spoke wheel of a wheelchair as claimed in claim 1, Features: The rim is also provided with a rim outer layer, which is arranged on the side of the first engaging portion away from the inner end, and a clearance hole is opened on the rim outer layer at a position corresponding to the rim perforation, and the diameter of the clearance hole is larger than the diameter of the rim perforation.

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