CN1193902C - Small caster with buffer - Google Patents
Small caster with buffer Download PDFInfo
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- CN1193902C CN1193902C CN 00124036 CN00124036A CN1193902C CN 1193902 C CN1193902 C CN 1193902C CN 00124036 CN00124036 CN 00124036 CN 00124036 A CN00124036 A CN 00124036A CN 1193902 C CN1193902 C CN 1193902C
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 239000004519 grease Substances 0.000 claims description 33
- 229920002545 silicone oil Polymers 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 210000000078 claw Anatomy 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 241001247986 Calotropis procera Species 0.000 description 23
- 230000008859 change Effects 0.000 description 16
- 230000009471 action Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 206010034719 Personality change Diseases 0.000 description 2
- 230000000747 cardiac effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
In a caster which supports a wheel by using via a link 3 a bracket 2 to be fitted to a wheelchair or the like, an end of the link 3 is connected with a rotation axis of the bracket 2 via a rubber member 8 which is twisted and deformed resulting from oscillating motion of the link 3, and the link 3 and the bracket 2 are connected by a hydraulic damper 20 which damps the oscillating motion of the link 3, whereby an oscillation or a shock can be absorbed.
Description
Technical field
The present invention relates to the Caster of a kind of doll carriage, wheelchair etc., particularly have the improvement of the Caster of buffer gear.
Background technology
Past, as Caster with buffer gear, the wheel and the body that connect wheelchair by connecting rod, connect connecting rod by rubber bush in base side, wheel displacement by load change produces is reversed rubber bush, absorbs to impact, or above-mentioned connecting rod is replaced as water bumper, make water bumper have the function of connecting rod and the function of water bumper.
Yet, under the situation of rubber bush type, only utilize reversing of rubber bush to be easy to make the decay after input is impacted insufficient, in addition, under the situation of the type of water bumper, because spring performance be certain, so the load that applies stretches water bumper, the shift in position of wheel is big, and the concavo-convex meeting of ground-surface causes resonance effect.
Summary of the invention
The present invention makes in view of above problem, and its purpose is to provide a kind of Caster with buffer gear, and the variation of the vehicle body eigentone that this Caster can produce with load variations is corresponding, and in addition, the attitude change that can make vehicle body is for certain.
In order to address the above problem, the Caster of band energy disperser of the present invention, by connecting rod at the carriage upper support wheel that is installed on wheelchair etc., it is characterized in that: the end that connects above-mentioned connecting rod by rubber component, this rubber component shakes along with the axis of revolution of the relative carriage of connecting rod and produces torsional deflection, and the water bumper that is shaken by the decay connecting rod engages above-mentioned connecting rod and carriage; Above-mentioned water bumper has buffer tubes, piston rod, piston and gap, this buffer tubes is connected in above-mentioned carriage or the above-mentioned connecting rod either party in the two, this piston rod is connected in above-mentioned carriage or above-mentioned connecting rod the opposing party in the two, this piston engages with above-mentioned piston rod and will be divided into 2 grease chambeies in the above-mentioned buffer tubes, and this gap is formed on above-mentioned buffer tubes and also above-mentioned 2 grease chambeies is communicated with above-mentioned piston space; Above-mentioned piston is made of cylindrical portion and round plate, and this cylindrical portion is installed on above-mentioned piston rod, this round plate and above-mentioned buffer tubes between form above-mentioned gap.So, make the rubber component that connects wheel and the connecting rod of carriage produce torsional deflection corresponding to the load of wheelchair, the inclination of decision connecting rod, in addition, by water bumper the shaking of connecting rod that the wheel up-and-down movement causes of decaying.
Like this, can be by the torsion spring characteristic of rubber bush and the damping characteristics of water bumper, the impulsive force input buffering input that vibration in walking relatively and surface deformation etc. bring, and can promptly decay.
The Caster of band energy disperser of the present invention, by connecting rod at the carriage upper support wheel that is installed on wheelchair etc., it is characterized in that: the end that connects above-mentioned connecting rod by rubber component, this rubber component shakes along with the axis of revolution of the relative carriage of connecting rod and produces torsional deflection, and the water bumper that is shaken by the decay connecting rod engages above-mentioned connecting rod and carriage; Above-mentioned water bumper has cylinder barrel, piston rod, piston; This cylinder barrel is connected in above-mentioned carriage or the above-mentioned connecting rod either party in the two, and this piston rod is connected in above-mentioned carriage or above-mentioned connecting rod the opposing party in the two, and this piston engages with above-mentioned piston rod and will be divided into 2 grease chambeies in the above-mentioned cylinder barrel; Above-mentioned piston is by the path that connects above-mentioned piston, open and close the valve body of above-mentioned path and the aperture being located at piston and being communicated with above-mentioned 2 grease chambeies constitutes.
The Caster of band energy disperser of the present invention, by connecting rod at the carriage upper support wheel that is installed on wheelchair etc., it is characterized in that: the end that connects above-mentioned connecting rod by rubber component, this rubber component shakes along with the axis of revolution of the relative carriage of connecting rod and produces torsional deflection, and the water bumper that is shaken by the decay connecting rod engages above-mentioned connecting rod and carriage; Above-mentioned water bumper has cylinder barrel, piston rod, piston; This cylinder barrel is connected in above-mentioned carriage or the above-mentioned connecting rod either party in the two, and this piston rod is connected in above-mentioned carriage or above-mentioned connecting rod the opposing party in the two, and this piston engages with above-mentioned piston rod and will be divided into 2 grease chambeies in the above-mentioned cylinder barrel; Above-mentioned piston has the path that connects above-mentioned piston, is located at the endless groove of piston end surface and opens and closes the valve body of above-mentioned endless groove; Above-mentioned endless groove is at least at grease chamber's opening and be communicated to above-mentioned path; Above-mentioned valve body has the aperture with a grease chamber and endless groove connection.
In addition, above-mentioned connecting rod is made of adjustable length connecting rod, so, by changing the length of connecting rod,, also can be often corresponding with the variation of the eigentone of wheelchair even be applied to the load variations on the wheelchair, can suppress the vibration of wheelchair, in addition also can be often the posture of wheelchair be remained necessarily.
Above-mentioned variable connecting rod by carrying cylinder, slidably be inserted into the movable axis of this carrying cylinder, knock hole provided thereon, and the locating dowel pin of adjusting the movable axis extension position constitute.
For above-mentioned wheel is fixed on assigned position, constitute constraint mechanism by 2 levers that are connected between carriage and the connecting rod, wherein a lever has the claw that is used to retrain 2 lever relative positions at the mutual connecting portion side end of lever, so, can suppress shaking of vehicle, for example, when being sitting in patient on the wheelchair and carrying out cardiac massage, can carry out effectively.
With the heavy body power fluid, silicone oil is for example enclosed as the power fluid of water bumper, is added in load on the carriage by the pressure bearing of above-mentioned silicone oil, so the load corresponding to being added in vehicle body shrinks while water bumper compresses, determines the degree of dip of connecting rod.When on vehicle body, applying big load, along with water bumper shrinks, pressure is risen rapidly by the compression property of silicone oil, suppress Caster and be absorbed in, can guarantee moving of connecting rod.When changing the compression ratio of silicone oil, the pressure ascent curve of water bumper also changes, and can obtain various attenuation characteristics.
Silicone oil uses the work oil phase than bulk compressibility height, so need in the inside of water bumper air chamber etc. be set, simple structure with general hydraulic machine.Because silicone oil has elastic force,, also can cancel rubber bush so there is supporting to be applied to the function of the load on the vehicle body.
Hydraulic actuating cylinder has buffer tubes, piston rod, piston and gap, this buffer tubes is connected in above-mentioned carriage or the connecting rod either party in the two, this piston rod is connected in carriage or connecting rod the opposing party in the two, this piston engages with piston rod and will be divided into 2 grease chambeies in the buffer tubes, this gap is formed on buffer tubes and is communicated with piston space and with 2 grease chambeies, so, wheel makes water bumper carry out expanding-contracting action corresponding to the power that is subjected to from the road surface, the viscosity drag of the silicone oil by the gap sharply rises corresponding to start speed, the shaking of the connecting rod of decaying effectively.
Water bumper is applied to the spring function of the load on the vehicle body and makes the buffer function of the vibration damping of connecting rod owing to having supporting, so can cut down the part count of Caster, makes its densification.
Because piston is made of cylindrical portion and round plate, this cylindrical portion is chimeric to be installed on above-mentioned piston rod, this round plate and buffer tubes between form the gap, so the design that need not change piston rod etc. can easily change the size of piston.By changing the size of piston, change the volume of the silicone oil that is filled to water bumper, can change the attenuation characteristic of water bumper.
Water bumper by the cylinder barrel that is connected in carriage or connecting rod either party in the two, be connected in carriage or connecting rod the opposing party in the two piston rod, and engage with piston rod and the piston that is divided into 2 grease chambeies in the cylinder barrel constituted, piston has path, the valve body that opens and closes path that connects piston, the aperture of being located at piston that reaches 2 grease chambeies of connection, so can more correctly produce attenuation power, and can be at the wideer range content adjustment attenuation power of changing places.
Water bumper by the cylinder barrel that is connected in carriage or connecting rod either party in the two, be connected in carriage or connecting rod the opposing party in the two piston rod, engage with piston rod and the piston that is divided into 2 grease chambeies in the cylinder barrel constituted, piston has path, the endless groove of being located at piston end surface that connects piston, the valve body that reaches the switching endless groove, this endless groove is communicated with at least one side's grease chamber opening and with path, valve body has the aperture of the ring-type of the grease chamber that is communicated with a side, so can more correctly produce attenuation power, and can be at the wideer range content adjustment attenuation power of changing places.
In the Caster of the band energy disperser of the bearing bracket wheel by being installed on wheelchair etc., has the water bumper that carries out expanding-contracting action along with the revolution of connecting rod, in water bumper, enclose the heavy body power fluid as power fluid, bear the load that is applied on the carriage by the heavy body power fluid.
Owing to be provided with grease chamber's volume adjusting mechanism of the compression ratio that can change the heavy body power fluid, so can easily change the attenuation characteristic of water bumper.
Description of drawings
Fig. 1 is the lateral plan that the present invention's the 1st form of implementation is shown.
Fig. 2 is the front elevation that the present invention's the 1st form of implementation is shown.
Fig. 3 is the cross sectional drawing along the rubber bush of A-A line among Fig. 1.
Fig. 4 is the cross sectional drawing of the water bumper of the present invention's the 1st form of implementation.
Fig. 5 illustrates the stroke of water bumper and the characteristic map of load relation.
Fig. 6 is the cross sectional drawing that the water bumper of the 3rd form of implementation is shown.
Fig. 7 is the lateral plan that the water bumper of the 4th form of implementation is shown.
Fig. 8 is the cross sectional drawing of piston portion of the water bumper of the 4th form of implementation.
Fig. 9 is the lateral plan that the 5th form of implementation is shown.
Figure 10 is the characteristic map that the relation of the moment of torsion of typical rubber sleeve and twist angle is shown.
The specific embodiment
Form of implementation of the present invention is described below with reference to the accompanying drawings.
As shown in Figure 1, Caster has with vehicle body bonded assembly carriages 2 such as wheelchairs, is supported on the connecting rod 3 of carriage 2 pivotally, is supported on the wheel 4 of connecting rod 3 leading sections pivotally.Wheel 4 is supported by the bolt 6 that is connected in connecting rod 3 leading sections pivotally by not shown bearing.
As shown in Figure 2, carriage 2 has コ font section, is connected to vehicle body by the bolt 5 that connects its top by not shown bearing.Carriage 2 is around vertical axis (left and right directions) revolution, and wheel 4 is towards working direction.
Connecting rod 3 is supported on carriage 2 by bolt 10, by reversing rubber bush 8, can turn round around horizontal shaft (above-below direction).
With reference to Fig. 3 as can be known, rubber bush 8 by urceolus 8a, inner core 8b and be located at urceolus 8a and inner core 8b between rubber component 8c constitute.
Rubber component 8c for example links to each other with inner core 8b with urceolus 8a by the sulfuration ways of connecting, and the inner core 8b that inserts the axis of revolution that leads to connecting rod 3 is connected in carriage 2 by bolt 10.
Along with moving up and down of wheel 4, connecting rod 3 tilts, and the rubber component 8c of rubber bush 8 reverses, and absorbs the impact that brings that moves up and down of wheel 4.
Single lever-type water bumper 20 is installed between carriage 2 and connecting rod 3, and energy disperser 20 stretches along with the revolution of connecting rod 3.
As shown in Figure 4, water bumper 20 has buffer tubes 21, piston rod 22 and piston 23.Buffer tubes 21 is connected in carriage 2 by pin 25.Piston rod 22 is connected in connecting rod 3 and is slidably mounted on earthen pipe 21 by pin 26.This piston 23 is connected to piston rod 22.
Open end inner face in buffer tubes 21 is provided with threaded portion 21a.At threaded portion 21a screw joint end member 29 cylindraceous, chimeric piston rod 22 is slidably located on the inboard of end member 29.Between end member 29 and piston rod 22, seal ring is installed, is carried out the sealing in the buffer tubes 21.
Piston 23 will be divided into two grease chambeies 27,28 in the buffer tubes 21, grease chamber 27 forms lubricating cup 27a and air chamber 27b again respectively.Surround the annular gap 24 that is communicated with each grease chamber 27,28 in 23 in earthen pipe 21 and piston.The inner peripheral surface of the relative buffer tubes 21 of the outer peripheral face of piston 23 is along week being in contactless state entirely.
The following describes its effect.
As described above, act on the load change of the body of wheelchair etc., the weight in patients difference and the road surface that for example are sitting on the wheelchair are concavo-convex, and connecting rod 3 wraparound rotating shafts are shaken, and reverse rubber bush 8.
In such occasion, the relatively vibration of the wheel 4 in walking input, for the swing movement of the wheelchair of decaying, by the effect of rubber bush 8 and water bumper 20, vibration and impact in the time of can absorbing the concavo-convex and lade of ground-surface.
, be added in the load difference on the wheelchair, make its eigentone difference separately, only the water bumper 20 by the regulation elastic behavior is only arranged can not make attenuating certain.
The natural frequency f of wheelchair is expressed from the next.
Wherein, K is the torsion spring constant of rubber bush 8, and M is the weight of wheelchair.
Therefore, the wheelchair changes in weight also changes natural frequency, but the wheelchair attitude change also changes the twist angle of rubber bush 8.
This be because, as shown in Figure 4, usually the torsion spring characteristic of rubber bush 8 has non-linear property, the weight increase of wheelchair 20 is many more, twist angle is big more, load up and down diminish (spring constant K diminishes).
Therefore, by utilizing this characteristic, even make the weight change of wheelchair, the torsion spring characteristic that rubber bush 8 has also changes corresponding to the change of weight.Rubber bush 8 flexibly supports wheelchair, and in addition, its natural frequency changes, and suppresses resonance effect.
Below, as the 2nd form of implementation of the present invention, illustrate with the heavy body power fluid for example silicone oil filling in the buffer tubes 21 of water bumper 20 as the embodiment of power fluid.
Silicone oil is the synthetic oil with dimethyl polysiloxane structure.When bearing pressure, the viscosity of silicone oil increases rapidly, illustrates than the much higher bulk compressibility of organic system oil.Because the bulk compressibility height of silicone oil so there is no need in the inside of water bumper 20 air chamber etc. to be set, simplifies structure.
Along with water bumper 20 shrinks, the silicone oil in the buffer tubes 21 is compressed, and its amount of compression is the volume that piston rod 22 is invaded, and the pressure in the buffer tubes 21 rises.Like this, like that, the load that water bumper 20 under static state supports increases corresponding to stroke (amount of contraction) shown in solid line among Fig. 5, and the increment rate of this load relative travel improves corresponding to compression ratio.
When water bumper 20 carried out contractive action, the silicone oil by annular gap 24 applies to be sheared and viscosity drag, and the support loading of water bumper 20 increases to the value bigger than static characteristics value.On the other hand, when water bumper 20 is upheld when action, the silicone oil by annular gap 24 applies to be sheared and viscosity drag, and the support loading of water bumper 20 reduces to the value littler than static characteristics value.
Constitute as described above,, shrink, the inclination of decision connecting rod 3 while water bumper 20 compresses silicone oil corresponding to the load that is added on the vehicle body.In the big occasion of the load that puts on vehicle body, along with water bumper 20 shrinks, the pressure of silicone oil sharply rises.Therefore, can suppress being absorbed in of Caster, guarantee the action of connecting rod 3.
Like this, water bumper 20 obtains the spring function and the buffer function that decay connecting rod 3 vibrates that supporting puts on the load of vehicle body, so can cancel rubber bush, reduces the components number of Caster, realizes densification.
Fig. 4 illustrates the 3rd form of implementation.End member 29 and the threaded portion 21a screw joint of being located at buffer tubes 21 inner faces constitute grease chamber volumetric speed control mechanism.By this mechanism, the water bumper 20 of filling silicone oil can change the initial stage compression ratio of silicone oil as required.
Below, the 4th form of implementation shown in Figure 6 is described.The formation portion identical with above-mentioned form of implementation adopts same-sign.
In this occasion, piston 34 is than piston 23 miniaturizations shown in Figure 4.The volume of piston 34 reduces, and filling is measured accordingly in the increase in volume of the silicone oil of water bumper 20, and water bumper 20 can obtain soft attenuation characteristic.
The following describes Fig. 7, the 4th form of implementation shown in Figure 8.The formation portion identical with above-mentioned the 1st form of implementation adopts identical symbol.In Fig. 7, going up direction among the figure is the compression direction of water bumper, and following direction is for upholding direction.
This form of implementation has changed the piston structure of the 1st form of implementation.That is, the perforation path 40 that axially connects along it is set, at the elongate sides end face of the water bumper of piston 35 endless groove 42 is set and connects path 40 to be communicated at piston 35.
On the other hand, for piston 35 is installed, in its grease chamber's side end minor diameter stage portion 22a is set at piston rod 22.The relative spacer 36 that is provided with this step is installed piston 35 at this spacer 36 by sleeve 37 with pushing up.Insert discoid valve body 38, piston 35 successively from the stage portion 22a side end of piston rod 22.At the external screw thread coupling nut 33 of the stage portion 22a side end that is formed at piston rod 22, fixed piston 35.The internal diameter of valve body 38 is set greatlyyer than the external diameter of sleeve 37.The connection of nut 33 is fixed valve body 38 not.
Valve body 38 is being pushed by the elastic force of the spring 39 that is arranged at 36 of valve body 38 and spacers and is being installed on piston 35 sides.The endless groove 42 of the end face of piston 35 is located in valve body 38 lockings.
Part at valve body 38 forms the aperture 41 that is communicated with endless groove 42 and grease chamber 50.
In the occasion that constitutes like this, when piston rod 22 when elongate sides moves, power fluid only is 50 through aperture 41, by endless groove 42 with connect path 40 and move to grease chamber 51 from the grease chamber.The higher attenuation power of deamplification force generating that produce this moment.
On the other hand, when piston rod 22 when contraction side moves, the power fluid of grease chamber 51 imports to grease chamber 50 by connecting path 40 and endless groove 42 from aperture 41.In addition, when the hydraulic pressure in the endless groove 42 during greater than the spring force of 39 pairs of valve bodies 38 of spring, spring 39 shrinks, and valve body 38 is towards moving axially, and endless groove 42 is open.The attenuation power of Chan Shenging can be considered only by connecting path 40 its characteristics of decision like this.That is, press the attenuation characteristic of side to regard aperture as and determined with connecting path 40.
By such formation, can more correctly produce attenuation power.Also can easily carry out the adjusting of attenuation power in wideer scope.
In this form of implementation, be provided with endless groove in piston 35, but be not limited thereto, also can as common piston, the path that connects in the same manner with the aperture that connects piston be set, the valve body of the opening that opens and closes this path is set.
In order to prevent leakage of oil, dust boot 43 is set, prevent that dust such as sand or mud from invading sealing.Between the periphery of the mounting end 44 of the piston rod 22 of dust boot 43 coverings and connecting rod 3 bonded assemblys one side and the periphery of earthen pipe 21.
Fig. 9 illustrates the 5th form of implementation, this connecting rod 3 is a feature to change its length, formed by carrying cylinder 11a and movable axis 11b, this carrying cylinder 11a is connected in by rubber bush 8 around the axis of revolution of carriage 2, and this movable axis 11b can form along carrying cylinder 11a slides within ground.Positioning pin 12 connects a plurality of location of being located at carrying cylinder 11a and movable axis 11b respectively and uses the hole, by the length of these positioning pin 12 adjustable link 3.In addition, but the axletree 25 free rotaring ground supporting wheels 4 of movable axis 11b front end.
In addition, between carriage 2 and connecting rod 3, the lockout mechanism 30 that the stagger angle of connecting rod 3 is constrained to predetermined angular is set, in this form of implementation, 2 levers 13,14 are connected in carriage 2 and connecting rod 3 with an end respectively.Either party lever at the restriction angulation of lever 13,14 is provided with claw 15 in connecting the mutual side end of lever, by moving up of these claw 15 limiting wheels.
Therefore, adopt movable axis 11b, carrying cylinder 11a slides relatively.In addition, fixing at assigned position by the locating dowel pin 12 that connects the knock hole that is arranged at carrying cylinder 11a and movable tube 11b respectively.Like this, the variable-length of connecting rod 3 changes the windup-degree of connecting rod 3 thus.
That is, in the identical occasion of loading condiction, the length of connecting rod 3 is long more, and then the torsion spring characteristic of rubber bush 8 becomes soft more, and short more then spring performance becomes hard more.
Therefore, by changing the length of connecting rod 3, can change the torsion spring characteristic.Therefore, by the combination torsion spring characteristic of rubber bush 8 and the length of connecting rod 3, precision that can be better remains the eigentone of wheelchair etc. necessarily.
In addition, when load variations, the posture height of wheelchair changes, but by adjusting the length of connecting rod 3, also the posture of wheelchair can be remained necessarily.
That is, as shown in figure 10, usually the axis of revolution of wheel 4 reverses rubber bush 8 by the increase of wheelchair load, move to a little 25 ' the position.Yet the load corresponding to change makes connecting rod 3 uphold a little 26 position, the torsion spring characteristic by making up rubber bush 8 and the length of connecting rod 3, can make the position of wheel 4 be positioned at the axis of revolution point 26 identical with short transverse ' the position.
Therefore, be certain by the posture that makes wheelchair, it is certain can making center-of-gravity position, guarantees certain path increment, keeps walking stability and traveling comfort.
In addition, between carriage 2 and connecting rod 3, lockout mechanism 30 is set.In the normal state, lever 13,14 forms the ㄑ word, and the angle θ that moves through 13,14 formation of 2 levers of wheel 4 changes and carries out.For wheel 4 is fixed in assigned position, making angle θ is more than 180 degree, contacts and fixed angle θ with the opposing party's lever 13 by the claw 15 that makes the lever 14 of being located at a side, and wheel 4 is constrained in assigned position.By having such formation, can retrain the displacement of wheel 4, can prevent to shake when being sitting in patient on the wheelchair and carrying out cardiac massage etc.
Claims (9)
1. Caster with energy disperser, by connecting rod at the carriage upper support wheel that is installed on wheelchair etc., it is characterized in that: the end that connects above-mentioned connecting rod by rubber component, this rubber component shakes along with the axis of revolution of the relative carriage of connecting rod and produces torsional deflection, and the water bumper that is shaken by the decay connecting rod engages above-mentioned connecting rod and carriage;
Above-mentioned water bumper has buffer tubes, piston rod, piston and gap, this buffer tubes is connected in above-mentioned carriage or the above-mentioned connecting rod either party in the two, this piston rod is connected in above-mentioned carriage or above-mentioned connecting rod the opposing party in the two, this piston engages with above-mentioned piston rod and will be divided into 2 grease chambeies in the above-mentioned buffer tubes, and this gap is formed on above-mentioned buffer tubes and also above-mentioned 2 grease chambeies is communicated with above-mentioned piston space;
Above-mentioned piston is made of cylindrical portion and round plate, and this cylindrical portion is installed on above-mentioned piston rod, this round plate and above-mentioned buffer tubes between form above-mentioned gap.
2. Caster with energy disperser, by connecting rod at the carriage upper support wheel that is installed on wheelchair etc., it is characterized in that: the end that connects above-mentioned connecting rod by rubber component, this rubber component shakes along with the axis of revolution of the relative carriage of connecting rod and produces torsional deflection, and the water bumper that is shaken by the decay connecting rod engages above-mentioned connecting rod and carriage;
Above-mentioned water bumper has cylinder barrel, piston rod, piston; This cylinder barrel is connected in above-mentioned carriage or the above-mentioned connecting rod either party in the two, and this piston rod is connected in above-mentioned carriage or above-mentioned connecting rod the opposing party in the two, and this piston engages with above-mentioned piston rod and will be divided into 2 grease chambeies in the above-mentioned cylinder barrel;
Above-mentioned piston is by the path that connects above-mentioned piston, open and close the valve body of above-mentioned path and the aperture being located at piston and being communicated with above-mentioned 2 grease chambeies constitutes.
3. Caster with energy disperser, by connecting rod at the carriage upper support wheel that is installed on wheelchair etc., it is characterized in that: the end that connects above-mentioned connecting rod by rubber component, this rubber component shakes along with the axis of revolution of the relative carriage of connecting rod and produces torsional deflection, and the water bumper that is shaken by the decay connecting rod engages above-mentioned connecting rod and carriage;
Above-mentioned water bumper has cylinder barrel, piston rod, piston; This cylinder barrel is connected in above-mentioned carriage or the above-mentioned connecting rod either party in the two, and this piston rod is connected in above-mentioned carriage or above-mentioned connecting rod the opposing party in the two, and this piston engages with above-mentioned piston rod and will be divided into 2 grease chambeies in the above-mentioned cylinder barrel;
Above-mentioned piston has the path that connects above-mentioned piston, is located at the endless groove of piston end surface and opens and closes the valve body of above-mentioned endless groove; Above-mentioned endless groove is at least at grease chamber's opening and be communicated to above-mentioned path;
Above-mentioned valve body has the aperture with a grease chamber and endless groove connection.
4. as the Caster of each described band energy disperser in the claim 1 to 3, it is characterized in that: above-mentioned connecting rod is made of adjustable length variable connecting rod.
5. as the Caster of each described band energy disperser in the claim 1 to 3, it is characterized in that: have constraint mechanism, this constraint mechanism is in order to be fixed on assigned position with above-mentioned wheel, be made of 2 levers that are connected between carriage and the connecting rod, wherein a lever has the claw that is used to retrain 2 lever relative positions at the mutual connecting portion side end of lever.
6. as the Caster of each described band energy disperser in the claim 1 to 3, it is characterized in that: above-mentioned water bumper is enclosed the heavy body power fluid as power fluid, is added in load on the carriage by the pressure bearing of above-mentioned heavy body power fluid.
7. the Caster of band energy disperser as claimed in claim 4 is characterized in that: above-mentioned variable connecting rod have carrying cylinder, slidably be inserted into the movable axis of this carrying cylinder, knock hole provided thereon, and adjust the locating dowel pin of movable axis extension position.
8. the Caster of band energy disperser as claimed in claim 6 is characterized in that: above-mentioned heavy body power fluid is a silicone oil.
9. the Caster of band energy disperser as claimed in claim 6 is characterized in that: the grease chamber's volume adjusting mechanism that is provided with the alterable compression ratio of above-mentioned heavy body power fluid.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26717199 | 1999-09-21 | ||
| JP267171/1999 | 1999-09-21 | ||
| JP2000018647 | 2000-01-27 | ||
| JP018647/2000 | 2000-01-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1288827A CN1288827A (en) | 2001-03-28 |
| CN1193902C true CN1193902C (en) | 2005-03-23 |
Family
ID=26547743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00124036 Expired - Fee Related CN1193902C (en) | 1999-09-21 | 2000-08-24 | Small caster with buffer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1193902C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862445B (en) * | 2012-10-12 | 2016-02-03 | 常州中进医疗器材有限公司 | A kind of cranking-block type damping universal wheels |
| JP2016000567A (en) * | 2014-06-11 | 2016-01-07 | Ｋｙｂ株式会社 | Caster unit |
| CN107599776A (en) * | 2017-08-09 | 2018-01-19 | 北京云迹科技有限公司 | Chassis independent suspension universal wheel and robot |
| CN111992581A (en) * | 2020-07-29 | 2020-11-27 | 浙江中浔环保科技有限公司 | Soil environmental protection that environmental protection engineering used handles repair equipment |
-
2000
- 2000-08-24 CN CN 00124036 patent/CN1193902C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1288827A (en) | 2001-03-28 |
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| C14 | Grant of patent or utility model | ||
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Address after: Tokyo, Japan Patentee after: KAYABA INDUSTRY CO LTD Address before: Tokyo, Japan Patentee before: Kayaba Industry Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050323 Termination date: 20190824 |