TYRE FOR ELECTRIC SKATEBOARDS

Abstract

A tyre for electric skateboards includes a hub and a tyre casing. The hub is sleeved with the tyre casing. The tyre casing is fixedly connected to the hub. An annular cavity is formed in the tyre casing in a circumferential direction of the tyre casing. A deformable shock absorption and noise reduction ring is fixedly disposed in the annular cavity.

Claims

1. A tyre for electric skateboards, the tyre comprising a hub and a tyre casing, wherein the hub is sleeved with the tyre casing, the tyre casing is fixedly connected to the hub, an annular cavity is formed in the tyre casing in a circumferential direction of the tyre casing, and a deformable shock absorption and noise reduction ring is fixedly disposed in the annular cavity, the hub comprises an inner ring and an outer ring coaxially disposed outside the inner ring and fixedly connected to the inner ring, an annular groove is formed in an inner wall of the shock absorption and noise reduction ring, and the outer ring is fixedly embedded in the annular groove, a thickness of the outer ring is greater than a depth of the annular groove, the outer ring is formed with multiple through holes axially penetrating through the outer ring, the multiple through holes are distributed at intervals in a circumferential direction of the outer ring, each of the through holes is communicated with the annular cavity and is filled with the polyurethane plastic, the polyurethane plastic enters the annular cavity from the through holes to connect the hub, the tyre casing and the shock absorption and noise reduction ring together, and the tyre casing and the polyurethane plastic in the through holes are poured and formed integrally.

2. The tyre for electric skateboards according to claim 1, wherein the shock absorption and noise reduction ring comprises an annular ring and multiple protruding ribs disposed on an outer wall of the annular ring and distributed at equal intervals in a circumferential direction of the annular ring, and a lengthwise extension direction of each of the protruding ribs is parallel to an axial direction of the annular ring.

3. The tyre for electric skateboards according to claim 2, wherein the annular ring has a thickness of 0.1-500 mm, and each of the protruding ribs has a height of 0.1-500.1 mm.

4. The tyre for electric skateboards according to claim 2, wherein a left end surface of each of the protruding ribs is a slope inclining downwards from right to left, and a right end surface of each of the protruding ribs is a slope extending downwards from left to right.

5. The tyre for electric skateboards according to claim 2, wherein the annular ring and the multiple protruding ribs are formed integrally.

6. The tyre for electric skateboards according to claim 1, wherein a density of the shock absorption and noise reduction ring is smaller than 1.1 g/cm.sup.3.

7. (canceled)

8. (canceled)

9. The tyre for electric skateboards according to claim 1, wherein a distance from the inner wall of the shock absorption and noise reduction ring to an outer wall of the inner ring is greater than 0 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a sectional view of the invention;

[0016] FIG. 2 is an exploded view of the invention;

[0017] FIG. 3 is a sectional view of a hub and a shock absorption and noise reduction ring of the invention;

[0018] FIG. 4 is an enlarged view of part A in FIG. 3;

[0019] FIG. 5 is a sectional view of the shock absorption and noise reduction ring of the invention.

DESCRIPTION OF THE EMBODIMENTS

[0020] The invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0021] Embodiment 1. As shown in the figures, a tyre for electric skateboards comprises a hub 1 and a tyre casing 2. The hub 1 is sleeved with the tyre casing 2, the tyre casing 2 is fixedly connected to the hub 1, an annular cavity 21 is formed in the tyre casing 2 in a circumferential direction of the tyre casing 2, and a deformable shock absorption and noise reduction ring 3 is fixedly disposed in the annular cavity 21.

[0022] Embodiment 2. This embodiment is identical with Embodiment 1 except that the shock absorption and noise reduction ring 3 comprises an annular ring 31 and multiple protruding ribs 32 disposed on an outer wall of the annular ring 31. The multiple protruding ribs 32 are distributed at equal intervals in a circumferential direction of the annular ring 31. The thickness of the annular ring 31 is 2.3 mm, a lengthwise extension direction of each protruding rib 32 is parallel to an axial direction of the annular ring 31, and the height of each protruding rib 32 is 16.0 mm. A left end surface of each protruding rib 32 is a slope 33 extending downwards from right to left, a right end surface of each protruding rib 32 is a slope 33 extending downwards from left to right, and the annular ring 31 and the multiple protruding ribs 32 are formed integrally.

[0023] Embodiment 3. This embodiment is identical with Embodiment 1 except that the shock absorption and noise reduction ring 3 comprises an annular ring 31 and multiple protruding ribs 32 disposed on an outer wall of the annular ring 31. The multiple protruding ribs 32 are distributed at equal intervals in a circumferential direction of the annular ring 31. The thickness of the annular ring 31 is 2.3 mm, a lengthwise extension direction of each protruding rib 32 is parallel to an axial direction of the annular ring 31, and the height of each protruding rib 32 is 17.5 mm. A left end surface of each protruding rib 32 is a slope 33 extending downwards from right to left, a right end surface of each protruding rib 32 is a slope 33 extending downwards from left to right, and the annular ring 31 and the multiple protruding ribs 32 are formed integrally.

[0024] Embodiment 4. This embodiment is identical with Embodiment 1 except that the shock absorption and noise reduction ring 3 comprises an annular ring 31 and multiple protruding ribs 32 disposed on an outer wall of the annular ring 31. The multiple protruding ribs 32 are distributed at equal intervals in a circumferential direction of the annular ring 31. The thickness of the annular ring 31 is 10.8 mm, a lengthwise extension direction of each protruding rib 32 is parallel to an axial direction of the annular ring 31, and the height of each protruding rib 32 is 16.0 mm. A left end surface of each protruding rib 32 is a slope 33 extending downwards from right to left, a right end surface of each protruding rib 32 is a slope 33 extending downwards from left to right, and the annular ring 31 and the multiple protruding ribs 32 are formed integrally.

[0025] Embodiment 5. This embodiment is identical with Embodiment 1 except that the shock absorption and noise reduction ring 3 comprises an annular ring 31 and multiple protruding ribs 32 disposed on an outer wall of the annular ring 31. The multiple protruding ribs 32 are distributed at equal intervals in a circumferential direction of the annular ring 31. The thickness of the annular ring 31 is 10.8 mm, a lengthwise extension direction of each protruding rib 32 is parallel to an axial direction of the annular ring 31, and the height of each protruding rib 32 is 17.5 mm. A left end surface of each protruding rib 32 is a slope 33 extending downwards from right to left, a right end surface of each protruding rib 32 is a slope 33 extending downwards from left to right, and the annular ring 31 and the multiple protruding ribs 32 are formed integrally.

[0026] Embodiment 6. This embodiment is identical with Embodiment 1 except that the density of the shock absorption and noise reduction ring 3 is 0.9 g/cm.sup.3.

[0027] Embodiment 7 This embodiment is identical with Embodiment 1 except that the density of the shock absorption and noise reduction ring 3 is 1 g/cm.sup.3.

[0028] Embodiment 8. This embodiment is identical with Embodiment 1 except that the hub 1 comprises an inner ring 11 and an outer ring 12 coaxially disposed outside the inner ring 11. The outer ring 12 is fixedly connected to the inner ring 11, an annular groove 34 is formed in an inner wall of the shock absorption and noise reduction ring 3, and the outer ring 12 is fixedly embedded in the annular groove 34.

[0029] Embodiment 9. This embodiment is identical with Embodiment 8 except that the thickness of the outer ring 12 is greater than the depth of the annular groove 34. The distance from an inner wall of the shock absorption and noise reduction ring 3 to an outer wall of the inner ring 11 is 5.8 mm. The outer ring 12 is formed with multiple through holes 121 axially penetrating through the outer ring 12, and the multiple through holes 121 are distributed at intervals in a circumferential direction of the outer ring 12. Each through hole 121 is communicated with the annular cavity 21 and is filled with polyurethane plastic 4, and the polyurethane plastic 4 enters the annular cavity 21 to connect the hub 1, the tyre casing 2 and the shock absorption and noise reduction ring 3 together.

[0030] Embodiment 10. This embodiment is identical with Embodiment 8 except that the thickness of the outer ring 12 is greater than the depth of the annular groove 34, and the distance between an inner wall of the shock absorption and noise reduction ring 3 and an outer wall of the inner ring 11 is 7.8 mm. The outer ring 12 is formed with multiple through holes 121 axially penetrating through the outer ring 12, and the multiple through holes 121 are distributed at intervals in a circumferential direction of the outer ring 12. Each through hole 121 is communicated with the annular cavity 21 and is filled with polyurethane plastic 4, and the polyurethane plastic 4 enters the annular cavity 21 to connect the hub 1, the tyre casing 2 and the shock absorption and noise reduction ring 3 together.

[0031] The machining process of the invention is as follows.

[0032] The hub 1 is mounted on a mold for fixing at first, the shock absorption and noise reduction ring 3 is disposed around the hub 1, such that the outer ring 12 is fixedly embedded in the annular groove 34. Then, a mold of the tyre casing 2 is disposed around the hub 1, and liquid polyurethane plastic 4 is injected into the mold of the tyre casing 2 to fill in the space of the tyre casing 2, the annular cavity 21 and all the through holes 121. After the polyurethane plastic 4 is condensed and solidified, the tyre casing 2 is formed by external polyurethane plastic 4, and the hub 1 and the shock absorption and noise reduction 3 are fixedly connected by internal polyurethane plastic 4.