CN211390828U

CN211390828U - Flexible wheel spoke for wheelchair

Info

Publication number: CN211390828U
Application number: CN202020086781.1U
Authority: CN
Inventors: 摩根斯·罗瑞森
Original assignee: Mbl Xiamen Co ltd
Current assignee: Mbl Xiamen Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-09-01
Anticipated expiration: 2030-01-15

Abstract

The utility model discloses a flexible wheel spoke is used to wheelchair, wheel hub is connected to the inner of spoke, and the rim is connected to the outer end, including a bundle of cellosilk that has flexible outer tube, spoke cap and screw tube box, the metal strip, the inner of spoke, the outer end is the both ends of flexible outer tube, inner, the outer end all stretches out part cellosilk, spoke cap and screw tube box are equipped with the bell mouth respectively, the spoke cap wears to overlap including the bell mouth, the screw tube box wears to overlap in the outer end through the bell mouth, inner, the part cellosilk that the outer end stretches out and the metal strip are arranged in the bell mouth together, metal strip one end still injects in the flexible outer tube, form inner, the core of the part cellosilk that the outer end stretches out props, form wedge block with epoxy with the cellosilk in the bell mouth and the metal strip solidification, thereby fix spoke cap and screw tube box respectively in inner, on. According to the scheme, metal strips are added in part of the fiber yarns at the inner end and the outer end of the spoke, so that the soft bundled fiber yarns are supported, and the effect similar to that of a needle is achieved.

Description

Flexible wheel spoke for wheelchair

Technical Field

The utility model belongs to the technical field of the wheel spoke, in particular to flexible wheel spoke for wheelchair.

Background

The spokes of common bicycles and wheelchair vehicles in daily life are steel bars, and the spokes of one bicycle or wheelchair vehicle usually use dozens of or dozens of spokes, so the wheel becomes heavy, the riding or pushing is laborious, and the steel spokes have weak impact resistance.

In order to reduce the weight of the spokes of bicycles and wheelchair vehicles and ensure the required strength, the steel bar is replaced by the fiber, such as a flexible wheel spoke, as shown in fig. 1, 2 and 3, the spoke 150, the inner end 162 of each spoke 150 is connected with the hub 130, the outer end 164 is connected with the rim 110, the spoke 150 comprises a bundle of fiber wires 152 with a flexible outer sleeve 154, a spoke cap 180 and a threaded sleeve 170, the inner end 162 and the outer end 164 of the spoke 150 are both ends of the flexible outer sleeve 154, the inner end 162 and the outer end 164 both extend out of part of the fiber wires 152, the spoke cap 180 and the threaded sleeve 170 are respectively provided with

tapered holes

181 and 171, the spoke cap 180 is penetrated on the inner end 162 through the tapered hole 181, the threaded sleeve 170 is penetrated on the outer end 164 through the tapered hole 171, the inner end 162 and the outer end 164 extend out and are placed in the

tapered holes

181 and 171, the wedge fibers 152 in the

tapered holes

181 and 171, thereby securing the spoke cap 180 and the threaded socket 170 to the inner and

outer ends

162, 164, respectively.

The manufacturing process comprises the steps of coating epoxy resin on loose fiber filaments 152 extending out of the inner end 162 and the outer end 164 to form a bundle shape, movably penetrating the inner end 162 and the outer end 164 through the spoke cap 180 and the threaded pipe sleeve 170, placing the fiber filaments 152 formed into the bundle shape at the inner end 162 and the outer end 164 in the

tapered holes

181 and 171, filling the epoxy resin in the

tapered holes

181 and 171, and placing the spoke cap 180 and the threaded pipe sleeve 170 in a mold respectively for heating, curing and forming.

Because the epoxy resin is in a glue state before being cured, the bundle-shaped fiber filaments 152 are also soft, at the moment, the bundle-shaped fiber filaments 152 cannot be well penetrated when penetrating into the

tapered holes

181 and 171, and the spoke cap 180 and the threaded sleeve 170 are movably sleeved on the inner end 162 and the outer end 164, so that the bundle-shaped fiber filaments 152 are relatively loose, the spoke cap 180 and the threaded sleeve 170 are easy to deflect and deform on the inner end 162 and the outer end 164 in the epoxy resin curing process, once the curing is completed, the spoke cap 180 and the threaded sleeve 170 are possibly inclined on the inner end 162 and the outer end 164, and finally, the defect is difficult to correct, and wedge blocks formed by curing the epoxy resin and the fiber filaments 152 have the joint strength only depending on the hardness after the epoxy resin is cured.

Therefore, some improvement in the spoke structure is necessary to facilitate the penetration of the bundled filaments into the tapered holes and to strengthen the wedge in the tapered holes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flexible wheel spoke for wheelchair, the wedge block intensity in this spoke bell mouth is high, during the preparation the beam form cellosilk penetrates in the bell mouth easily.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a flexible wheel spoke for a wheelchair comprises a bundle of fiber wires with a flexible outer sleeve, a spoke cap, a threaded sleeve and a metal strip, wherein the inner end and the outer end of the spoke are two ends of the flexible outer sleeve, part of the fiber wires extend out of the inner end and the outer end of the spoke, the spoke cap and the threaded sleeve are respectively provided with a conical hole, the spoke cap penetrates through the conical hole and is sleeved on the inner end, the threaded sleeve penetrates through the conical hole and is sleeved on the outer end, the part of the fiber wires extending out of the inner end and the outer end and the metal strip are arranged in the conical hole together, one end of the metal strip is inserted into the flexible outer sleeve to form a core support of the part of the fiber wires extending out of the inner end and the outer end, and epoxy resin is used for solidifying the fiber wires and the metal strip in the conical hole to form a wedge block, so that the spoke.

Preferably, the metal strip is a length of iron or steel wire.

Preferably, the spoke cap and the threaded pipe sleeve are made of aluminum.

Compared with the prior art, the metal strip is added in the part of the fiber wire extending out of the inner end and the outer end of the spoke, and one end of the metal strip is also inserted into the flexible outer sleeve, so that in the manufacturing process, when the loose fiber wires extending out of the inner end and the outer end are coated with epoxy resin to form a bundle shape, the metal strip is wrapped in the bundle fiber wires to support the soft bundle fiber wires, when the spoke cap and the threaded pipe sleeve penetrate through the conical hole to the inner end and the outer end of the spoke, the metal strip plays a role similar to a guide needle, and plays a supporting role to prevent the spoke cap and the threaded pipe sleeve from deflecting on the inner end and the outer end of the spoke, the fiber wires and the metal strip in the conical hole are solidified in the wedge block by using the epoxy resin, and the strength of the wedge block is increased.

Drawings

FIG. 1 is an assembly view of a prior art spoke attachment hub, rim;

FIG. 2 is a schematic half-section of a prior art spoke;

FIG. 3 is a radial cross-sectional view of a prior art spoke;

FIG. 4 is an exploded perspective view of the spoke of the present invention;

FIG. 5 is a perspective view of the spoke assembly of the present invention;

FIG. 6 is a perspective view of the spoke assembly of the present invention;

FIG. 7 is a half-sectional view of the spokes of the present invention not coated with epoxy;

fig. 8 is a half-sectional view of the spokes coated with epoxy of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts, please refer to fig. 4-8.

As shown in FIGS. 4-8, a flexible wheel spoke 250 for a wheelchair, the spoke 250 having an inner end 262 connected to a hub (not shown) and an outer end 264 connected to a rim (not shown), comprises a bundle of fiber filaments 252 having a flexible outer sleeve 254, a spoke cap 280 made of aluminum or steel and a threaded sleeve 270, and a metal bar 200, wherein the metal bar 200 is a section of iron wire or steel wire, the inner end 262 and the outer end 264 of the spoke 250 are both ends of the flexible outer sleeve 254, the inner end 262 and the outer end 264 both extend out part of the fiber filaments 252, the spoke cap 280 and the threaded sleeve 270 are respectively provided with

tapered holes

281, 271, the spoke cap 280 is inserted into the inner end 262 through the tapered hole 281, the threaded sleeve 270 is inserted into the outer end 264 through the tapered hole 271, the inner end 262, the part of the fiber filaments 252 extending out of the outer end 264 and the metal bar 200 are placed into the

tapered holes

281, 271 together, one end 201 of the metal bar 200 is inserted, The portion of the filament 252 extending from the outer end 264 is cored (as shown in fig. 7), and the filament 252 and the metal strip 200 within the

tapered holes

281 and 271 are cured with epoxy to form wedge blocks 300 (as shown in fig. 8), thereby securing the spoke cap 280 and the nipple 270 to the inner end 262 and the outer end 264 of the spoke 250, respectively.

In the manufacturing process, the spokes 250 are made of encapsulated high strength rayon filaments, which are organic fibers having cross-sectional strength superior to steel and carbon fibers. As shown in FIG. 4, one end 201 of a metal strip 200 is inserted into a flexible outer sleeve 254 at an inner end 262 and an outer end 264 of a spoke 250, then the loose fiber 252 extending from both the inner end 262 and the outer end 264 is coated with epoxy resin to form a bundle shape, the metal strip 200 is wrapped in the bundle fiber 252 to support the soft bundle fiber 254, and then a spoke cap 280 and a thread sleeve 270 coated with epoxy resin are sleeved on the inner end 262 and the outer end 264, in the process, the metal strip 200 performs a similar "needle guiding" function on the bundle fiber 252, that is, when a thread is threaded into a pinhole in a similar life, the thread needs to be stained with water or baked on the flame, so that the thread is hard, and thus the thread can easily pass through the pinhole, and similarly, the metal strip 200 can support the bundle fiber 252 to be smoothly threaded into a tapered hole 281 of the spoke cap 280 and the

thread sleeve

270, 271, filling epoxy resin into the

tapered holes

281 and 271, placing the spoke cap 280 and the threaded pipe sleeve 270 into a mold respectively, heating, solidifying and forming to form the wedge-shaped block 300, wherein the wedge-shaped block 300 contains the metal strip 200, so the strength is increased compared with the wedge-shaped block without the metal strip in the prior art, in addition, one end 201 of the metal strip 200 is inserted into the flexible pipe 254, the spoke cap 280 and the threaded pipe sleeve 270 are movably sleeved on the inner end 262 and the outer end 264 without solidification, which is to play a role in rectifying deviation of the metal strip 200, and the spoke cap 280 and the threaded pipe sleeve 270 are prevented from being sleeved on the inner end 262 and the outer end 264 to be deflected.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a wheel hub is connected to the inner of spoke to and rim, its characterized in that are connected to the outer end: the spoke comprises a bundle of fiber wires with a flexible outer sleeve, a spoke cap, a threaded pipe sleeve and a metal strip, wherein the inner end and the outer end of the spoke are two ends of the flexible outer sleeve, partial fiber wires extend out of the inner end and the outer end, the spoke cap and the threaded pipe sleeve are respectively provided with a conical hole, the spoke cap penetrates through the conical hole and is sleeved on the inner end, the threaded pipe sleeve penetrates through the conical hole and is sleeved on the outer end, partial fiber wires extending out of the inner end and the outer end and the metal strip are arranged in the conical hole together, one end of the metal strip is also inserted into the flexible outer sleeve to form a core support of the partial fiber wires extending out of the inner end and the outer end, the fiber wires and the metal strip in the conical hole are solidified by epoxy resin to form a wedge.

2. The flexible wheel spoke for a wheelchair of claim 1, wherein: the metal strip is a section of iron wire or steel wire.

3. The flexible wheel spoke for a wheelchair of claim 1, wherein: the spoke cap and the threaded pipe sleeve are made of aluminum.

4. The flexible wheel spoke for a wheelchair of claim 1, wherein: the bundle of filaments with the flexible outer casing is an encapsulated high strength rayon filament.