CN205041632U - Including wheelchair of shaft with hub - Google Patents
Including wheelchair of shaft with hub Download PDFInfo
- Publication number
- CN205041632U CN205041632U CN201520498386.3U CN201520498386U CN205041632U CN 205041632 U CN205041632 U CN 205041632U CN 201520498386 U CN201520498386 U CN 201520498386U CN 205041632 U CN205041632 U CN 205041632U
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- wheelchair
- hub
- wheel shaft
- axle ends
- fillet
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Abstract
The utility model relates to an including wheelchair of shaft with hub. This wheelchair includes: shaft (1) that has shaft tip (9), and has the admittance of arranging into the hub (3 of central through -hole (11) of shaft tip (9), 3'). Shaft tip (9) have a surface, and this surface has a three chamfer face (9a, 9b), and hub (3, 3') have limited the inner wall (13a, 13b, 13c) of central authorities through -hole (11). Inner wall (13a, 13b, 13c) arrange with shaft tip (9) chamfer face (9a, 9b) joint, thus prevent hub (3, 3') with relative rotation between shaft (1).
Description
Technical field
The disclosure relates in general to wheelchair.Be specifically related to a kind ofly to there is wheel shaft and the wheelchair of hub of wheel rim is installed.
Background technology
Wheelchair has wheel shaft and the hub for installing wheel usually.Each hub can be mounted to each axle ends of wheel shaft.Specifically, each hub can be arranged to the axle ends receiving wheel shaft.Therefore, each hub can have the hub opening being arranged to hold axle ends.
In order to prevent relative between hub with wheel shaft rotation, axle ends can be provided with axial protuberance, and the inner surface of hub opening can be provided with the corresponding axial groove for receiving axial protuberance.In order to wheel shaft and the torque stress of hub within the service life of wheelchair mechanically can be born, a very little rotary gap between axial protuberance and axial groove, should be there is at the most.When wheel shaft short (generally for the demand meeting narrower wheelchair), especially mechanical strength toleration to be considered.But gap can not be little like that as desired, because this can make hub be difficult to be mounted to axle ends, and has such demand: when being assemblied in around axle ends by hub, must apply larger axial force.The applying of axial force large between erecting stage can damage wheelchair, and the motorization wheelchair that mechanically can be attached to the gear-box of wheelchair for wheel shaft is particularly like this.Axial force too much between erecting stage especially can damage the parts of gear-box inside.Therefore, when building hub and wheel shaft, tolerance must be quite little, and this proposes high requirement to manufacturing process.
On the other hand, the little rotary gap between the axial protuberance of axle ends and the axial groove of hub can affect and hub is fastened to wheel shaft and rely the bolt used.On the side of wheelchair, that is, at a concrete wheel place, bolt may loosen, and on the wheel of opposition side, bolt may screw.This can cause wheel to loosen, and comes off even completely.
Prevent take turns loosen measure can such as comprise make the quality of bolt higher, pin packing ring and bolt be combined with screw fastening.But, expect to simplify the hub of wheelchair and wheel shaft design, and expect to alleviate problem further by aforementioned schemes.
Utility model content
In view of the above, overall object of the present disclosure is to provide a kind of wheelchair solving or at least alleviate the problem of prior art.
Therefore, according to first aspect of the present disclosure, provide a kind of wheelchair, this wheelchair comprises: the wheel shaft with axle ends; And there is the hub being arranged to the center through hole of receiving described axle ends, wherein, described axle ends has outer surface, this outer surface has three fillet surfaces, and wherein said hub has the inwall limiting described center through hole, described inwall is arranged to engage with the described fillet surface of described axle ends, thus prevents the relative rotation between described hub with described wheel shaft.
Obtainable effect is thus: even if for short wheel shaft, also can to provide high mechanical strength than the simpler mode of existing scheme.High mechanical properties can be especially useful to motorization wheelchair, particularly like this when wheel shaft is live axle (that is, being arranged to be driven by the motor of wheelchair).This effect is obtained: because the joint of hub and axle ends only depends on the degree that axle ends is received by hub due to following aspect, so tangential (that is, rotating) gap and axial gap can be eliminated, thus lower to tolerances.Therefore, be enough deep in the through hole of hub by driving wheel shaft end, the tight fit between these two parts can be obtained in case that there is no gap.Therefore, the risk damaged in assembling process can be reduced.Tight fit also reduces the risk that wheel loosens.
Generally, the design is firmer than described prior art, and to assemble more simply the more microlesion risk of power drive system when wheel apparatus or motorization wheelchair.
According to a kind of embodiment, described axle ends has axial medium pore, and wherein said wheelchair comprises bolt, and this bolt extends through the described center through hole of described hub, and extends in described axial medium pore, thus described hub is fastened to described wheel shaft.
According to a kind of embodiment, described fillet surface is uniformly distributed along the circumferential direction of described axle ends.
According to a kind of embodiment, the described center through hole of described hub is tapered into can receive described axle ends.
According to a kind of embodiment, each fillet surface limits a smooth plane.
According to a kind of embodiment, described fillet surface forms a part for the respective side of butt triangular pyramid.
According to a kind of embodiment, in the cross section of described axle ends, with the fillet surface that 60 degree of angles layouts often pair are adjacent.
According to a kind of embodiment, the described outer surface of described axle ends has lucky three fillet surfaces.Advantageously, lucky three fillet surfaces provide especially firm joint between axle ends and the center through hole of hub.And the design of lucky three fillet surfaces can provide the simple manufacture process of axle ends.
According to a kind of embodiment, the described outer surface of described axle ends has more than three fillet surfaces.
According to a kind of embodiment, the described inwall of described hub has inclined plane, and these inclined planes limit the respective planes crossing with the centrage of described hub, and wherein, each inclined plane is all arranged to the corresponding fillet surface against described axle ends.
According to a kind of embodiment, each inclined plane all has the axial dimension of the axial dimension being longer than arbitrary described fillet surface.Which ensure that axle ends does not stretch out from center through hole at the far-end of center through hole.And, axle ends can be shifted onto in the center through hole of hub thus, until fillet surface is received completely by hub, and in the wedged hub of axle ends, thus obtain tight fit, and therefore prevent the motion to axial between hub with wheel shaft and relative rotary motion.
According to a kind of embodiment, described wheelchair is motorization wheelchair.
According to a kind of embodiment, described wheelchair is electric wheelchair.
A kind of embodiment comprises gear-box, and wherein, described wheel shaft is mechanically attached to the described gear-box for driving described wheel shaft.
A kind of embodiment comprises rim and wheel, and wherein, described rim is mounted to described hub and describedly takes turns.
Generally, all terms used in claim should be understood according to its general significance in the art, clearly limit unless separately had herein.The lifting manipulation of all " element, equipment, parts and a component " etc. answers broad understanding to become to refer at least one example of described element, described equipment, described parts and described component etc., unless expressly stated otherwise.
Accompanying drawing explanation
The detailed description of the invention of invention theory is described by way of example now with reference to accompanying drawing, in the accompanying drawings:
Fig. 1 is the axonometric chart of an embodiment of the layout comprising wheel shaft and hub;
Fig. 2 a is the wheel shaft of formation wheel shaft hub assembly and the axonometric chart of hub of Fig. 1;
Fig. 2 b is the front view of wheel shaft hub assembly in Fig. 2 a;
Fig. 2 c illustrates the front view of the variation of wheel shaft hub assembly, and wherein, in this wheel shaft hub assembly, hub has three arms;
Fig. 3 is the profile of wheel shaft hub assembly along A-A in Fig. 2 b; And
Fig. 4 is the wheelchair comprising wheel shaft hub assembly.
Detailed description of the invention
More at large describe theory of the present invention hereinafter with reference to accompanying drawing, illustrated therein is exemplary embodiment.Although theory of the present invention can be embodied as multiple multi-form, should not be construed as and be constrained to embodiment as herein described; On the contrary, just provide these embodiments by way of example, make the disclosure by detailed and concrete, and the scope of theory of the present invention can be passed on to those skilled in the art comprehensively.In describing in full, same reference numerals represents similar elements.
The disclosure relates to the wheelchair with wheel shaft, and wheel shaft has axle ends and hub, and this hub can be mounted to axle ends.Rim can be mounted to hub, thus wheel is attached to hub.
Wheelchair has the wheel shaft of some types mentioned herein.The quantity of these wheel shafts depends on the quantity of wheel.If wheelchair is manual wheelchair, that is, non-motorised wheelchair, so the quantity of wheel shaft such as can equal the half of the quantity of taking turns.When wheelchair is motorization wheelchair, wheel shaft can be the live axle being arranged to be driven by motor, and thus the quantity of wheel shaft can depend on the quantity of driving wheel.In the case, wheel shaft can be live axle, and these live axles can be quantitatively equal with the quantity of driving wheel.
Wheel shaft has axle ends, and axle ends has outer surface, and this outer surface has three fillet surfaces.The axle ends with fillet surface does not have circular cross section.Fillet surface quantitatively can be three just, or can have more than three fillet surfaces.Fillet surface is relative to the centerline dip of wheel shaft, thus axle ends is tapered towards its end face.Fillet surface all limits respective plane.Each such plane has identical gradient relative to the centrage of wheel shaft.Hub has axially extended center through hole, and this through hole has inwall.Hub is arranged to axle ends to receive in through-holes, and inwall is arranged to engage with axle ends, especially engages with fillet surface, thus prevents wheel shaft from rotating relative to hub.
Fig. 1 illustrates the wheel shaft 1 of motorization wheelchair (not shown) and an embodiment of hub 3.Motorization wheelchair can have the power drive system of the wheel for driving wheelchair.Power drive system can comprise motor and mechanically be attached to motor with the gear-box of live axle 1.
As shown in Figure 2 a, exemplary wheel shaft 1 has gearbox end 7, and this gearbox end is arranged to mechanically be attached to gear-box 5.In FIG, gearbox end 7 is mechanically attached to gear-box 5, and thus invisible.Except gearbox end 7 has for engaging with gear-box 5 so that except the part of the component be driven by a motor, gearbox end 7 has circular cross-section substantially, thus wheel shaft 1 can be rotated.
Exemplary wheel shaft 1 also has axle ends 9.Axle ends 9 has outer surface, and this outer surface has three fillet surfaces 9a, 9b, can see two this fillet surfaces in Fig. 1.As previously mentioned, the quantity of fillet surface can be three as in the present embodiment just, or axle ends can have more than three fillet surfaces, such as four fillet surfaces or five fillet surfaces.All fillet surface 9a, 9b are all smooth.Fillet surface 9a, 9b corresponding size is separately preferably identical.In order to reach this object, fillet surface 9a, 9b have identical length in the axial direction, and preferably have identical width.Fillet surface 9a, 9b tilt, and therefore axle ends 9 is tapered towards its end face 15.Each fillet surface 9a, 9b extend to the sagittal plane limited by end face 15.Thus each fillet surface 9a, 9b are stopped by the sagittal plane limited by end face 15.All fillet surface 9a, 9b have identical gradient relative to the centrage of wheel shaft 1.Each fillet surface relative to comprise wheel shaft 1 whole centrage plane angle of inclination usually can 5 to 80 degree scope in, preferably 7 to 50 degree scopes in, more preferably 8 to 45 degree scopes in.Usually selected angle is carried out relative to the length of wheel shaft and diameter.More shallow wheel shaft needs larger angle usually.
Hub 3 is arranged to be arranged on axle ends 9.Hub 3 has the center through hole 11 that the axial direction along hub 3 extends.Center through hole 11 has inwall 13a, 13b, 13c of the shape of cross section limiting center through hole 11.Hub 3 is arranged to axle ends 9 to be received in center through hole 11.And, inner surface 13a, 13b, 13c be arranged to when this hub 3 is disposed in axle ends 9 surrounding against or abut axle ends 9.For reaching this object, hub 3 is arranged to engage with axle ends 9, thus prevents the relative motion between wheel shaft 1 and hub 3.
The through hole 11 of hub 3 is tapered towards the direction away from wheel shaft 1.The proximal port of through hole 11 is mouths that through hole receives wheel shaft 1, and thus this proximal port of through hole 11 has the cross-sectional area larger than the cross-sectional area of the far distance port 17 of through hole 11.
Wheel shaft 1 can have axial medium pore 23.Axial medium pore 23 extends to wheel shaft 1 from the end face 15 of axle ends 9.Layout shown in Fig. 1 comprises packing ring 21 and bolt 25.Bolt can be such as M8 bolt, or M10 bolt.Bolt 25 is arranged in the through hole 11 of hub 3, and extends through the through hole 11 of hub 3, and arrives in the axial medium pore 23 of wheel shaft 1.Hub 3 is fastened thus and be fixed to wheel shaft 1.Packing ring 21 is arranged between bolt head and hub 3.The diameter of axial medium pore 23 can affect the selection at the angle of inclination of fillet surface 9a, 9b.
Hub 3 also comprises multiple arm 19 being arranged to rim to be secured to.According to the present embodiment, hub 3 has four arms, but alternatively, hub can be provided with lucky three arms (as illustrated in fig. 2 c), or more than four arms, so that fastening rim.Each arm can be provided with respective clamp device (being such as arranged to receive the respective aperture of bolt), thus hub 3 is fastened to wheel rim.Alternatively, hub can be integrated with rim, and potentially also can be integrated with wheel.
According to the present embodiment, fillet surface 9a, 9b are uniformly distributed along the circumferential direction of wheel shaft 1.Thus, fillet surface 9a, 9b distributes in a symmetrical manner.But fillet surface can select circumferentially direction non-uniform Distribution else, that is, asymmetric.Adjacent arbitraryly can such as to arrange with the angle of 60 degree fillet surface 9a, 9b.But it should be noted that according to the present embodiment, at arbitrary neighborhood between fillet surface 9a, 9b, there is the bending section of the outer surface of axle ends 9, this bending section connects adjacent fillet surface 9a, 9b.
According to the embodiment in Fig. 1, can see that fillet surface forms a part for the side of butt triangular pyramid.
Fig. 2 a illustrates the axonometric chart of wheel shaft under the state being in and having assembled 1 and hub 3, and the layout of Fig. 2 b in a of Fig. 2 shown in front view, only hub 3, packing ring 21 and bolt 25 are visible.
Fig. 2 c illustrates the front view of wheel shaft and hub, the hub 3 in Fig. 2 c
'except just having three arms, this hub is identical with the hub represented in Fig. 1 with Fig. 2 a.
Fig. 3 illustrates wheel shaft 1 and hub 3 cross section A-A in figure 2b.Can see at this by one of illustrative fillet surface of fillet surface 9a from through hole 11 private side.Inner surface 13a, 13b, 13c of through hole 11 have the inclined plane identical with corresponding fillet surface 9a, 9b of axle ends 9.As previously mentioned, through hole 11 is tapered in this way.The inclined plane of each fillet surface 9a, 9b abutting or the inwall against correspondence, thus prevent the relative rotation between wheel shaft 1 with hub 3.According to the embodiment in Fig. 3, before assembling hub 3 with wheel shaft 1, the axial length of each inclined plane of inwall 13a, 13b, 13c or axial dimension l
1be longer than axial length or the axial dimension l of arbitrary fillet surface 9a, 9b
2.This refers to, cross-sectional area minimum in through hole 11 can be less than the minimum cross-sectional area of the axle ends being provided with fillet surface 9a, 9b.Therefore, the mode that the far distance port 17 from through hole 11 stretches out can not be received in hub 3 with axle ends 9 by axle ends 9.Which ensure that and can obtain close fit by packing ring 21 and bolt 25.
According to the embodiment in Fig. 3, each inclined plane of inwall extends to the far-end of through hole 11, that is, extend to the far distance port 17 of through hole 11.
Fig. 4 describes an embodiment of wheelchair 27.Although foregoing wheelchair also can be manual wheelchair, in embodiment in the diagram, wheelchair is motorization wheelchair, normally electric wheelchair.Exemplary wheelchair 27 is front wheel driving ejector half, but it should be noted that wheelchair can alternative case in this way in drive, rear wheel drive variety, four-wheel drive type or six drive.
Wheelchair 27 comprises: base device 29; Wheel 33a, 33b; Rim 35a, 35b; And be mounted to the seat-assembly 31 of base device 29.Wheelchair 27 also comprises hub 3 and wheel shaft 1 (not shown) as described herein, and wheel 33a is mounted to wheel shaft 1 by rim 35a.
Theory of the present invention is generally described above with reference to some embodiments.But as those of skill in the art's easy understand, other embodiment except above disclosed embodiment within the scope of the theory of the present invention be defined by the following claims is feasible equally.
Claims (16)
1. a wheelchair (27), it is characterized in that, this wheelchair comprises:
There is the wheel shaft (1) of axle ends (9); And
There is the hub (3 of the center through hole (11) being arranged to receive described axle ends (9); 3 '),
Wherein, described axle ends (9) has outer surface, and this outer surface has three fillet surfaces (9a, 9b), and wherein said hub (3; 3 ') there is the inwall (13a, 13b, 13c) limiting described center through hole (11), described inwall (13a, 13b, 13c) is arranged to engage with the described fillet surface (9a, 9b) of described axle ends (9), thus prevents described hub (3; 3 ') with the relative rotation between described wheel shaft (1).
2. wheelchair according to claim 1 (27), it is characterized in that, described axle ends (9) has axial medium pore (23), and wherein said wheelchair (27) comprises bolt (25), this bolt extends through described hub (3; 3 ') described center through hole (11), and extend in described axial medium pore (23), thus by described hub (3; 3 ') described wheel shaft (1) is fastened to.
3. wheelchair according to claim 1 and 2 (27), is characterized in that, described fillet surface (9a, 9b) is uniformly distributed along the circumferential direction of described axle ends (9).
4. wheelchair according to claim 1 and 2 (27), is characterized in that, described hub (3; 3 ') described center through hole (11) is tapered into can receive described axle ends (9).
5. wheelchair according to claim 1 and 2 (27), is characterized in that, each fillet surface (9a, 9b) all limits a flat surfaces.
6. wheelchair according to claim 1 and 2 (27), is characterized in that, described fillet surface (9a, 9b) forms a part for the respective side of butt triangular pyramid.
7. wheelchair according to claim 1 and 2 (27), is characterized in that, in the cross section of described axle ends (9), with the fillet surface (9a, 9b) that 60 degree of angles layouts often pair are adjacent.
8. wheelchair according to claim 1 and 2 (27), is characterized in that, the described outer surface of described axle ends (9) has lucky three fillet surfaces (9a, 9b).
9. wheelchair according to claim 1 and 2 (27), is characterized in that, the described outer surface of described axle ends (9) has more than three fillet surfaces (9a, 9b).
10. wheelchair according to claim 1 and 2 (27), is characterized in that, the described inwall (13a, 13b, 13c) of described hub has inclined plane, and these inclined planes limit and described hub (3; 3 ') respective planes that centrage intersects, wherein, each inclined plane is all arranged to the corresponding fillet surface (9a, 9b) against described axle ends (9).
11. wheelchairs according to claim 10 (27), is characterized in that, each inclined plane all has the axial dimension (l being longer than arbitrary described fillet surface (9a, 9b)
2) axial dimension (l
1).
12. wheelchairs according to claim 1 and 2 (27), it is characterized in that, described wheelchair comprises rim and wheel, and wherein, described rim is mounted to described hub (3; 3 ') and describedly to take turns.
13. wheelchairs according to claim 1 and 2 (27), is characterized in that, described wheelchair (27) is motorized wheel chair.
14. wheelchairs according to claim 13 (27), is characterized in that, described wheelchair (27) is electric wheelchair.
15. wheelchairs according to claim 13 (27), it is characterized in that, described wheelchair comprises gear-box (5), and wherein, described wheel shaft (1) is mechanically attached to the described gear-box (5) for driving described wheel shaft (1).
16. wheelchairs according to claim 14 (27), it is characterized in that, described wheelchair comprises gear-box (5), and wherein, described wheel shaft (1) is mechanically attached to the described gear-box (5) for driving described wheel shaft (1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498386.3U CN205041632U (en) | 2015-07-10 | 2015-07-10 | Including wheelchair of shaft with hub |
| US15/202,248 US9795523B2 (en) | 2015-07-10 | 2016-07-05 | Wheelchair comprising wheel axle and hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498386.3U CN205041632U (en) | 2015-07-10 | 2015-07-10 | Including wheelchair of shaft with hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205041632U true CN205041632U (en) | 2016-02-24 |
Family
ID=55335258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520498386.3U Active CN205041632U (en) | 2015-07-10 | 2015-07-10 | Including wheelchair of shaft with hub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205041632U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110934694A (en) * | 2018-09-21 | 2020-03-31 | 广西民族师范学院 | Intelligent wheelchair |
-
2015
- 2015-07-10 CN CN201520498386.3U patent/CN205041632U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110934694A (en) * | 2018-09-21 | 2020-03-31 | 广西民族师范学院 | Intelligent wheelchair |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |