CN1120557C - Motor with friction mechanism and fluid-flow control apparatus using said motor - Google Patents
Motor with friction mechanism and fluid-flow control apparatus using said motor Download PDFInfo
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- CN1120557C CN1120557C CN99102572A CN99102572A CN1120557C CN 1120557 C CN1120557 C CN 1120557C CN 99102572 A CN99102572 A CN 99102572A CN 99102572 A CN99102572 A CN 99102572A CN 1120557 C CN1120557 C CN 1120557C
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- 230000007246 mechanism Effects 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 208000019901 Anxiety disease Diseases 0.000 description 2
- 230000036506 anxiety Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K21/00—Fluid-delivery valves, e.g. self-closing valves
- F16K21/02—Fluid-delivery valves, e.g. self-closing valves providing a continuous small flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Transmission Devices (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A motor with a friction mechanism comprises a stator, a rotor unit, a rotation shaft and a coil spring, whose one end is retained with a rotor unit 33 and which is wound on the rotary shaft 34 inserted into its inner hole. When the rotor unit rotates toward one direction, a desired tightening force of the coil spring is utilized to transmit the rotation force of the rotor unit to the rotary shaft. When a load exceeding a predetermined value is applied to the rotary shaft, the coil spring slips and rotates on the rotary shaft. If the rotor unit rotates in the other rotating direction, the coil spring tightens the rotary shaft with a higher tightening force than the desired tightening force to tighten the rotary shaft to transmit the rotation force of the rotor unit to the rotary shaft. A fluid flow rate controller controls the flow rate of fluid utilizing the motor. The number of parts is little, the structure is simple and the assemble process is very facility.
Description
Technical field
The present invention relates to the motor of friction mechanism and use the fluid-flow control apparatus of this motor.
Background technology
As the device that the refrigerant flow of refrigerator and air conditioner is controlled, a kind of device that uses electromagnetically operated valve or needle-valve is arranged at present.
But the volume control device of use electromagnetically operated valve generally is closure or openness of setting any, and it is inappropriate finely tuning flow.In addition, the sound during on-off action more also is a problem.In addition, even any state of closure or openness will keep the sort of state just must make electromagnetically operated valve be in "on" position, aspect power consumption, also have problems.
On the other hand, use the volume control device of needle-valve, be a kind ofly for example stepping motor etc. to be used as drive source, to convert the revolving force of this stepping motor to device that the thrust fluid flow of needle-valve is controlled, compare with the device that uses electromagnetically operated valve, not only can reduce motion and sound but also can finely tune flow.
But, use the volume control device of this needle-valve, generally the size as the motor of drive source is often bigger.This be because: this volume control device often is mainly used in the flow control of the cold-producing medium of air conditioner etc., and in the occasion of air conditioner, because the pressure differential of the outflow side the when pressure of the inflow side of cold-producing medium and this cold-producing medium of blocking is bigger, so must promote needle-valve with bigger thrust.Therefore, it is inevitable bigger to drive the motor size that needle-valve uses.
But, the device that uses this needle-valve is used at that the volume control device of the cold-producing medium of refrigerator etc., problem is also arranged aspect the space.In the occasion of refrigerator, because especially will obtain the interior space of pantry significantly, so require as far as possible to do each part little.Therefore, the fluid control device of cold-producing medium also is required miniaturization to greatest extent in the nature of things.And if motor size is done little, then produced to carrying out reliable flow control and can not obtain the problem of necessary torque.
In addition, also there is following problem in needle-valve: because in order to carry out high-precision control, the central shaft of the moving direction of needle-valve becomes delicate with the position relation of the central shaft of the passage that inserts this needle-valve, so high-precision designing technique and the empirical technical know-how when assembling necessitate.
In addition, for the motor that is used for this volume control device, when the direction to shut off valve is rotated,, when desire increases undue load again, generally be provided with the friction mechanism that is used for absorbing this power thereon although valve is in closed condition.That is, use the device of needle-valve or other valve, convert the power that promotes valve to and a part of inserting valve in passage comes closing passage to control by revolving force with motor.Yet even this device valve is at the state that is in sealing on the passage and again when the direction that is pressed into valve applies power, valve also is in the lock state, and when making valve carry out breakdown action, can not make valve be returned to original state sometimes.
In order not produce the sort of unfavorable condition, block etc. for example is set, when its arrival valve is in the closure state position, no longer promote the power of valve, friction mechanism perhaps is set on motor, although then valve is in closed condition, when desire increases undue load again, just played the effect that makes rotor idle running and no longer make device such as valve driving thereon.
But, in using the mobile mode that limits to valve such as block, exist the problem that impact sound because of with the block butt time produces noise.Problem such as in addition, friction mechanism exists generally that the part number is many, complex structure and assembling work are often relatively poor.Especially to the device of this strong request miniaturization, in restricted less space because friction mechanism will be set, thus claimed structure is simple, during assembling operation good and can bring into play reliable friction function.
Summary of the invention
Therefore, the objective of the invention is to, eliminate above-mentioned the sort of shortcoming, provide a kind of and carry out the motor that has friction mechanism of reliable abrasive action by simple structure and use this motor, carry out the fluid-flow control apparatus of reliable flow control by simple structure.
For achieving the above object, the motor of band friction mechanism of the present invention comprises: package has the stator of winding; The rotor portions of relative configuration with this stator; Perforation is inserted in the rotating shaft that is located at the through hole on this rotor portions; The helical spring that one end engages with described rotor portions and the hole connects the described rotating shaft of insertion within it, it is characterized in that, when described rotor portions during to the rotation of a side direction of rotation, utilize the clamping force of the expection that this helical spring has by described helical spring and the revolving force of described rotor portions is passed to described rotating shaft, the rotating torques of described rotor portions, set greatlyyer than the slip torque of the described relatively rotating shaft of described helical spring, when the load that on this rotating shaft, is subjected to more than certain, described helical spring slides on rotating shaft along with the rotation of described rotor portions and rotates, when described rotor portions during to the rotation of the opposing party's direction of rotation, rotation along with described rotor portions, described helical spring produces the clamping force also bigger than the clamping force of described expection, this clamping force clamps described rotating shaft, and the revolving force of described rotor portions passed to described rotating shaft, the described helical spring other end is the free state that can be free to slide around described rotating shaft.
Description of drawings
Fig. 1 is the sectional view of example of the fluid-flow control apparatus of the expression motor that uses band friction mechanism of the present invention.
Fig. 2 is the front view that the arrow A direction is seen from Fig. 1.
Fig. 3 is the figure of rotor portions of the motor of the employed band friction mechanism of the fluid-flow control apparatus of presentation graphs 1, (A) is vertical view, (B) is sectional view.
Fig. 4 is the figure of friction spring used on the motor of the employed band friction mechanism of the fluid-flow control apparatus of presentation graphs 1, (A) be vertical view, (B) being the end view that the arrow B direction is seen from (A) figure, (C) is the end view that the arrow C direction is seen from figure (A).
Fig. 5 is the figure of friction spring variation used on the motor of the employed band friction mechanism of the fluid-flow control apparatus of presentation graphs 1, (A) is vertical view, (B) is end view.
Fig. 6 is the figure of rotor portions variation of the motor of the employed band friction mechanism of the fluid-flow control apparatus of presentation graphs 1, (A) is vertical view, (B) is end view.
The preferable example of invention
Below, the example of the invention process form is described in conjunction with Fig. 1 to Fig. 6.
Fig. 1 and Fig. 2 are the figure of explanation the invention process form, and Fig. 1 is the sectional view of the employed fluid-flow control apparatus structure of motor of expression band friction mechanism of the present invention, and Fig. 2 is the front view that the arrow A direction is seen from Fig. 1.
The fluid-flow control apparatus 1 of this Figure 1 and Figure 2 illustrates as if its apparent structure is separated significantly, then comprises: body 2; Motor 3; The pipe 4 of fluid inflow side and the pipe 5 of fluid outflow side.Motor 3 is installed in the rear end side of body 2, becomes the drive source that driver's valve opens and closes.In the present embodiment, this motor 3 uses stepping motor, has friction mechanism described later.The pipe of inflow side (below be called inflow pipe) 4 is installed in the front of body 2, and the pipe of outflow side (below be called effuser) 5 and inflow pipe 4 are communicated with and are installed in the front of body 2.In addition in the present embodiment, fluid illustrates as cold-producing medium.
Stepping motor 3 comprises: package has the stator 32 of winding 31; In the inboard of this stator 32 and the rotor portions 33 of stator 32 relative configurations; Be inserted in rotating shaft 34 and the helical spring 35 of through hole 33a in the perforation of the central axis direction setting of this rotor portions 33.One end bearing of helical spring 35 is on rotor portions 33, and the other end is made free state, and the hole connects and inserts rotating shaft 34 within it, and the clamping force of the expection that utilization itself is had keeps this rotating shaft 34.
Under this state, by by power supply supply side 36 to winding 31 supply powers, rotor portions 33 just is rotated.In addition, helical spring 35 has constituted the part of friction mechanism, describes in the back about this friction mechanism.In addition, below helical spring 35 is called friction spring 35.
This limiting member 38 is formed by flat spring, while rotate bottom direction from body 23 to rotor portions that hold when moving when rotor portions 33, projection 33b and limiting member 38 butts by being located at rotor portions 33 bottoms limit it and move.
In addition, the rotating shaft 34 of stepping motor 3 has the large-diameter portion 34a that friction spring 35 is installed integratedly and is formed with spiral helicine externally threaded minor diameter 34b, and rotation freely is bearing on the bearing 21 of body 2.Inner peripheral surface at bearing 21 is provided with internal thread, and the external screw thread of rotating shaft 34 and the internal thread of bearing 21 are screwed.
When rotor portions 33 rotations, rotor portions 33 and its rotating shaft 34 are along the axial of rotating shaft 34 and in the rotation of the inside of body 2 and to axially moving as linearity.In addition, here, the direction of rotation of the rotor portions 33 that the preceding extreme direction that makes rotating shaft 34 to body 2 (left side of Fig. 1) is advanced just calls changes.Therefore, when counter-rotating was done in the rotation of rotor portions 33, rotor portions 33 just moved to the rear end side direction (right side of Fig. 1) of body 2 with its rotating shaft 34.When this rear end side moves, utilize aforesaid limiting member 38 to make the position relative stator 32 of rotor portions 33 and stop to go up in position.
And, balladeur train 24 is installed in the place ahead again of rotating shaft 34.This balladeur train 24 along with rotor portions 33 positive and negative then with rotating shaft 34 in body 2 to moving axially.In the inside of this balladeur train 24 and near the front end of balladeur train 24, accommodate the spheroid 25 that moves as valve, and between this spheroid 25 and rotating shaft 34, clamped spiral helicine spring 26.In addition, spheroid 25, its piece is exposed to balladeur train 24 and remains in the balladeur train 24.And between spheroid 25 and spring 26, clamping plate 27, and utilize the elastic force of spring 26, will give spheroid 25 to the power that the preceding extreme direction of balladeur train 24 is pushed.
In addition, near the front end of body 2 side is equipped with inflow pipe 4, and at front end effuser 5 is installed, fluid by inflow pipe 4 (being cold-producing medium herein) is in case after flowing in the body 2, just flow out to effuser 5 by the tiny fluid flow pass 28 that is located at body 2 front ends.At this moment, flowing of cold-producing medium controlled by the position of spheroid 25.In addition, in this example, not the control that what is said or talked about changes the flow of cold-producing medium, but for explanation is oversimplified, for cold-producing medium being passed through or stoping it to flow, the example that promptly is out (state that cold-producing medium is passed through) for setting for or closes any state of (state that stops flow of refrigerant) describes.
Yet, the above-mentioned fluid flow pass 28 that on body 2, is provided with, by with the sphere butt that remains on the spheroid 25 on the balladeur train 24, just can stop flowing of cold-producing medium, but in order to obtain reliable closed condition, so the abutment portion of the spheroid 25 of fluid flow pass 28 is the curved surface (concave surface) that has with the sphere same curvature of spheroid 25.It just can obtain this curved surface in the fabrication stage by pushing strongly with the identical shaped spheroid of spheroid 25.
Below in conjunction with Fig. 3, Fig. 4 aforesaid friction mechanism is described.
On the other hand, package has friction spring 35 as a friction mechanism part on rotating shaft 34.Friction spring 35 (A) is vertical view as shown in Figure 4, (B) is the end view that the arrow B direction is seen from figure (A), (C) is the end view that the arrow C direction is seen from figure (A).The tangent to periphery of this relative friction spring 35 in friction spring 35, one ends is outstanding and form the 1st protuberance 35a to right angle orientation, and the other end is outstanding and form the 2nd protuberance 35b to the tangential direction of friction spring 35.The 2nd protuberance 35b also knows from Fig. 4 (C), slightly to downside (the 1st protuberance 35a side) bending.
And, this friction spring 35 shown in Fig. 4 (A), when with the 2nd protuberance 35b side in top and the side is when seeing from it, constituting with the 2nd protuberance 35b is that basic point is wound up into the 1st protuberance 35a to dextrorotation (clockwise direction coiling).In addition, the inner diameter d of this friction spring 35 is littler than the external diameter of rotating shaft 34.Therefore, insert rotating shaft 34 by the diameter of friction spring 35 being expanded to turn up the soil, thereby friction spring 35 can be wrapped on the rotating shaft 34 from the 2nd protuberance 35b of friction spring 35.And in the normal state, friction spring 35 utilizes the clamping force of the original expection that has and makes the state of rotating shaft 34 and friction spring 35 becoming one.In addition, this friction spring 35 is for the clamping force of rotating shaft 34, and is littler than the torque (rotating torques of rotor portions 33) of stepping motor 3.
In addition, in the 2nd protuberance 35b side of this friction spring 35, be fixed on the rotating shaft 34 as the E shape of axial restraint member circle 37, friction spring 35 utilizes this E shape circle 37 to limit rotating shaft 34 forward end directions and moves (with reference to Fig. 1).
And, when the rotating shaft 34 that will be wound with friction spring 35 is inserted in the through hole 33a of cylinder element 331 of rotor portions 33, manage to make the 1st protuberance 35a of friction spring 35 to enter in the slit 335, so that rotating shaft 34 is inserted in the through hole 33a.Thus, the 1st protuberance 35a of friction spring 35 is the terminal part that guiding enters into the 1st large diameter hole 333 with slit 335, and like this, but limits excessive is inserted rotating shaft 34.In addition, the 2nd protuberance 35b is not fixed on the cylinder element 331 of rotor portions 33, but can freely slide on the end face of the 2nd large diameter hole 334.
In addition, as the degree of depth (equaling radical length) of the slit 335 that is arranged at the support on rotor portions 33 cylinder elements 331, make the degree of depth that can from the front end to the root, the 1st protuberance 35a be kept.This be because, when the revolving force with rotor portions 33 passes to friction spring 35, because the revolving force that is subjected to rotor portions 33 by the 1st protuberance 35a integral body transmits reliable revolving force, so make the durability raising of friction spring 35.
In addition, the width of slit 335 grooves is made with the thickness (forming the member thickness of friction spring 35) of the 1st protuberance 35a roughly the same, and when becoming the state behind the 1st protuberance 35a insertion slit 335, the direction of rotation of rotor portions 33 is with regard to the non-loosening phenomenon.This is because if when the 1st protuberance 35a inserts slit 335 under loosening state is being arranged, exist the anxiety that causes producing noise because of becoming flexible along with the rotation of rotor portions 33, and it is prevented.
In addition, the 2nd protuberance 35b can be free to slide as previously mentioned.Though the 2nd protuberance 35b needn't specially be set, but when making the end of friction spring 35 with maintaining the original state, because of contacting with aforesaid E shape circle 37, its end cause friction etc. to influence the slip torque, so the anxiety that can not carry out normal abrasive action is arranged, for it is prevented, make the end of friction spring 35 outstanding slightly, and with its bending slightly downwards.
Then, the operating principle with regard to the example of this structure describes.Here, though the operating principle of friction mechanism mainly is described, at first do simple declaration with regard to the control of opening, stop of the flow of refrigerant of the fluid-flow control apparatus shown in this example.
At first, the spheroid 25 in the balladeur train 24 not with the state of fluid flow pass 28 butts of body 2 under, after the cold-producing medium that flows through inflow pipe 4 enters in the body 2, flow out to effuser 5 by fluid flow pass 28.Under this state, stop the action of flow of refrigerant, make winding 31 be in "on" position, so that the rotor portions 33 of stepping motor 3 is just being changeed.Thus, rotor portions 33 is just being changeed, and described rotating shaft 34 also just changes.At this moment, the revolving force of rotor portions 33 passes to rotating shaft 34 by friction spring 35.
Promptly, friction spring 35 is wrapped on the rotating shaft 34 with the state that clamps by certain power (clamping forces of the friction spring 35 original expections that have), in addition, because the 1st protuberance 35a inserts the slit 335 of rotor portions 33 cylinder elements 331, so, thereby its revolving force is passed to rotating shaft 34 by rotor portions 33 rotations.Thus, rotating shaft 34 rotates along with the rotation of rotor portions 33.
In addition, because the internal thread of setting screws mutually on the external screw thread that is provided with on the rotating shaft 34 and the bearing 21, so by rotor portions 33 rotations (just changeing here), thereby rotor portions 33 and rotating shaft 34 jointly in body 2 linearity move to its preceding extreme direction, soon, the set fluid flow pass 28 of spheroid 25 and the leading section of body 2 that is installed in the balladeur train 24 of rotating shaft 34 leading sections connects.In addition, for this spheroid 25 and the necessary displacement of fluid flow pass 28 butts, only be distance about 1mm to the displacement of the position (closed condition) of prevention flow of refrigerant promptly from state (opening state) position of flow of refrigerant.
Like this, when fluid flow pass 28 butts of spheroid 25 and body 2, the sphere by spheroid 25 contacts as face with fluid flow pass 28 formed curved surfaces, just can stop flow of refrigerant reliably.In addition, under this state, also can stop to drive stepping motor 3, but, still continue usually to drive for absorbing rigging error etc.But the power of pushing spheroid 25 is absorbed by spring 26.And, on spheroid 25, utilize the elastic force of described spring 26 to flow out the effect that passage 28 produces pressing force by certain above power convection cell, can obtain reliable butt state.
So, under the state of spheroid 25 and fluid flow pass 28 butts of body 2, when rotor portions 33 continues to rotate again, friction mechanism generation effect.That is, under the state of spheroid 25 and fluid flow pass 28 butts of body 2, when rotor portions 33 rotations, the 1st protuberance 35a of friction spring 35 utilizes the also rotation together of its revolving force, and friction spring 35 is also with its rotation, thereby rotating shaft 34 also rotates.But, at this moment,,, become so-called lock-out state so can limit moving axially of rotating shaft 34 because spheroid 25 becomes state with fluid flow pass 28 butts of body 2 by certain above power.
In this state, when rotor portions 33 desire when rotation again, the rotating torques of rotor portions 33 is because of bigger than the slip torque of friction spring 35 relative rotation axis 34, so friction spring 35 rotates around the slip around of rotating shaft 34, rotor portions 33 becomes the state of idle running, can prevent that the undue rotation of rotating shaft 34 from advancing.
This time, for flow of refrigerant is become opening state from the closed condition that so stops flow of refrigerant, to winding 31 energisings of stepping motor 3, so that the rotation of rotor portions 33 is reversed.Like this, rotor portions 33 begins counter-rotating.At this moment, because spheroid 25 becomes state with fluid flow pass 28 butts of body 2 by certain above power, so rotating shaft 34 is a lock-out state.
Under this lock-out state, be in the state that can not the revolving force of rotor portions 33 be passed to rotating shaft 34 (friction mechanism generation effect and rotor portions 33 are the state of idle running) often by friction spring 35, but in friction mechanism of the present invention, when rotor portions 33 was done counter-rotating, the 1st protuberance 35a of friction spring 35 that is inserted in the slit 335 of described cylinder element 331 also desired to rotate to reverse directions together.This friction spring 35 as illustrated in fig. 3, because of being the helical spring of dextrorotation, thus when rotor portions 33 is done counter-rotating, the action that the 1st protuberance 35a reduces with regard to the internal diameter of desiring to make friction spring 35, promptly 35 pairs of rotating shafts of friction spring 34 are done the action of stronger clamping.
Thus, the revolving force of rotor portions 33 passes to rotating shaft 34, rotating shaft 34 is done the counter-rotating action with rotor portions 33, when move to the direction of from body 2, extracting, when stepping motor 3 step number is in accordance with regulations moved, spheroid 25 fastens with the front end of balladeur train 24.Then, when rotor portions 33 continued counter-rotating again, spheroid 25 began to move with balladeur train 24, broke away from the fluid flow pass 28 of body 2, became the state (opening state) of flow of refrigerant.
In aforesaid example, friction mechanism as stepping motor 3, when helical spring being used as friction spring 35, rotor portions 33 to positive veer rotation, the clamping force of utilizing the expection that friction spring 35 had passes to rotating shaft 34 with the revolving force of rotor portions 33, thereby can make rotating shaft 34 rotations.And, under this rotation status, when being subjected to bigger load on the rotating shaft 34, friction spring 35 rotation of around rotating shaft 34, do sliding along with the rotation of rotor portions 33, rotor portions 33 becomes the state of idle running, can prevent that rotating shaft 34 from forcing rotation again.Therefore, can avoid rotating shaft 34 to become lock-out state.
On the other hand, when desiring to make rotating shaft 34 make rotor portions 33 counter-rotatings from replying state like this to original state, because the bigger power of friction spring 35 usefulness clamps rotating shaft 34, so the revolving force of rotor portions 33 can be passed to rotating shaft 34 reliably.Therefore,, but when desiring to make described rotating shaft 34 to be returned to the origin-location from this state, also the revolving force of rotor portions 33 rotating shaft 34 can be passed to reliably, lock-out state can be eliminated even rotating shaft 34 is temporarily locked.
As mentioned above, the motor of band friction mechanism of the present invention, as making rotor portions 33 just change, utilize rotating shaft 34, can be described as best motor along with its rotation is done action back slightly, made rotor portions 33 counter-rotatings, drive source when being returned to a series of actions of original state.
For example, by being used as the drive source of the flow in the fluid-flow control apparatus that illustrates being controlled usefulness in aforementioned example, then when carrying out flow control, rotating shaft 34 is a certain amount ofly to moving axially, when certain flow set finishes, the moment of the load more than being subjected to necessarily on the rotating shaft 34, and when the action that makes rotating shaft 34 stop to move, just can make the rotation rotating shaft 34 that passes within reason of rotor portions 33.In addition, when making it from this replying state to original state, though must make rotor portions 33 counter-rotatings so that rotating shaft 34 also reverses with it, the electronic function of band friction mechanism of the present invention is carried out this action reliably.
Thus, for the fluid-flow control apparatus that uses so with the motor of friction mechanism, cold-producing medium mobile placed when opening or closing, the spheroid 25 that plays valve action is moved reliably, and spheroid 25 is in stop the location status abrasive action down of flow of refrigerant, and in addition, mobile when becoming blocked state and convert opening state at cold-producing medium, the also action that can be well on can be controlled reliably to cold-producing medium.
The fluid-flow control apparatus 1 of this example, the front end of spheroid 25 sides of rotating shaft 34, outstanding and extend to the 24b of large diameter hole portion from the thin diametric hole 24a of portion of the insertion spring 26 of balladeur train 24.In addition, between thin 24a of diametric hole portion and the 24b of large diameter hole portion, the inclined plane is set.Therefore, when spheroid 25 sank in balladeur train 24, plate 27 was just run into the front end of rotating shaft 34, can avoid the unfavorable condition after spring 26 is compressed, for example can avoid spring 26 to enter the thin diametric hole 24a of portion can not reply, or is fixed into the unfavorable conditions such as position of inclination at the 24b of large diameter hole portion inner panel 27.
In addition,, be not limited thereto, without departing from the spirit and scope of the present invention, can do all distortion though above-mentioned example is the example of the example of the best of the present invention.For example, in above-mentioned example,, the other end is made free shape, the other end is made with rotating shaft 34 engaged though an end of friction spring 35 is engaged with rotor portions 33.In addition, the 1st protuberance 35a of friction spring 35 or the 2nd protuberance 35b also can make the protuberance 35c that stretches out to short transverse foreign side as shown in Figure 5.
In addition, in above-mentioned example, be on the through hole 33a of rotor portions 33, to form to have the diameter large-diameter portion also bigger and form, but also can make rotor portions 33 as shown in Figure 6 than the external diameter of friction spring 35.That is, also 2 slits as the support of the 1st protuberance 35a of engaging friction spring 35 can be formed and be located on the axial end of rotor portions 33 with projection 33d.
In addition, in above-mentioned example, motor is that example illustrates with stepping motor 3, but the motor of band friction mechanism of the present invention is not subjected to stepping motor 3 restrictions.In addition, with the device that motor was suitable for of friction mechanism, be not limited to the device controlled as the fluid flow that illustrates in the above-mentioned example, can in wide spectrum, use as so.
As above explanation, the application's the major part as friction mechanism is the helical spring as friction spring, and this helical spring end is engaged with rotor portions, rotating shaft is connected insert helical spring endoporus, thereby constitute friction mechanism.Though structure is so simple, but when rotor portions during to the rotation of a side direction of rotation, can utilize the clamping force of the expection that helical spring has and the revolving force of rotor portions is passed to rotating shaft reliably, when this rotating shaft is subjected to bigger load, around rotating shaft, do the rotation of sliding along with the rotation of rotor portions by helical spring, can prevent from undue thrust is passed to rotating shaft.Therefore, can prevent that rotating shaft from becoming lock-out state.
In addition, when rotor portions during to the rotation of the opposing party's direction of rotation, because the clamping force that the helical spring utilization is also bigger than the clamping force of expection clamps rotating shaft, and the revolving force of rotor portions passed to rotating shaft, so even rotating shaft temporarily is in the lock state, also can be reliably the revolving force of rotor portions be passed to rotating shaft, state can unlock.So, because the electronic function of band friction mechanism of the present invention is carried out reliable abrasive action, in addition, it is less and structure is extremely simple to constitute the part number of friction mechanism, so aspect cost and assemble the effect that this respect can produce excellence easily.
In addition, the application's the helical spring as a friction mechanism part because the one distal process is gone out, and is inserted at formed slit on the rotor portions this protuberance to be bearing on the rotor portions, so the simple in structure and very easy assembling of friction mechanism.In addition because helical spring protuberance is seamlessly inserted in the slit of rotor portions, so in these parts indifferent loosening phenomenon, thereby can prevent generation noise when action.
In addition, adopt volume control device of the present invention, the motor of band friction mechanism can be used as the drive source that flow in the fluid flow amount control device is controlled usefulness.Therefore, when carrying out flow control, rotating shaft carries out a certain amount of action, when being loaded on the moment of setting certain flow for, the rotating shaft and making rotating shaft stop to move, can carry out the rotation of rotor portions too not being passed to the abrasive action of rotating shaft reliably.In addition, when making it, after making the rotor portions counter-rotating, can reliably its revolving force be passed to rotating shaft from this replying state to original state.Thus, can more effectively carry out fluid flow control reliably, and can almost not have the quiet flow control of abrasive action sound.
Claims (8)
1. motor with friction mechanism, comprising: package has the stator of winding; The rotor portions of relative configuration with this stator; Perforation is inserted in the rotating shaft that is located at the through hole on this rotor portions; The helical spring that one end engages with described rotor portions and the hole connects the described rotating shaft of insertion within it, it is characterized in that, when described rotor portions during to the rotation of a side direction of rotation, utilize the clamping force of the expection that this helical spring has by described helical spring and the revolving force of described rotor portions is passed to described rotating shaft, the rotating torques of described rotor portions, set greatlyyer than the slip torque of the described relatively rotating shaft of described helical spring, when the load that on this rotating shaft, is subjected to more than certain, described helical spring slides on rotating shaft along with the rotation of described rotor portions and rotates, when described rotor portions during to the rotation of the opposing party's direction of rotation, rotation along with described rotor portions, described helical spring produces the clamping force also bigger than the clamping force of described expection, this clamping force clamps described rotating shaft, and the revolving force of described rotor portions passed to described rotating shaft, the described helical spring other end is the free state that can be free to slide around described rotating shaft.
2. the motor of band friction mechanism as claimed in claim 1, it is characterized in that, described helical spring at least at one end has the protuberance of giving prominence to the circumferencial direction outside from this helical spring, and described rotor portions has this protuberance of supporting, is used for and the incorporate support of described helical spring.
3. the motor of band friction mechanism as claimed in claim 1, it is characterized in that, described rotor portions has diameter than the big large-diameter portion of described helical spring external diameter on described through hole, can insert package described helical spring rotating shaft is arranged, this large-diameter portion, be formed with slit as the described support that described helical spring described protuberance can be inserted, by described helical spring described protuberance being inserted the slit of described rotor portions, a described helical spring end is supported on the described rotor portions.
4. the motor of band friction mechanism as claimed in claim 3 is characterized in that, the described through hole of described rotor portions comprises the axial restraint member that carries out spacing usefulness with described helical spring other end butt, at axial direction.
5. the motor of band friction mechanism as claimed in claim 1, it is characterized in that, axial end in described rotor portions is formed with as 2 slit projections that enter the support of described helical spring described protuberance, by described helical spring described protuberance being inserted described slit with in the projection, a described helical spring end is supported on the described rotor portions.
6. as the motor of claim 3 or 5 described band friction mechanisms, it is characterized in that described slit or described 2 slits are made the structure that can seamlessly insert described protuberance with projection.
7. fluid-flow control apparatus, it is characterized in that, the rotating shaft of the described motor with described friction mechanism of claim 1 is inserted in the body of the tubular that fluid flow controls, by described rotor portions rotation, by described helical spring its revolving force is passed to described rotating shaft, on described body, be provided with rotation transformation with this rotating shaft device of motion that is in line, and on described body, be provided with the volume control device that fluid flow is controlled with the rectilinear motion of described rotating shaft is corresponding.
8. fluid-flow control apparatus as claimed in claim 7, it is characterized in that, when volume control device corresponding with the rectilinear motion of described rotating shaft and when stopping fluid and flowing, described helical spring along with the rotation of described rotor portions around the slip around rotation of rotating shaft.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05902198A JP3620816B2 (en) | 1998-02-24 | 1998-02-24 | Motor with friction mechanism and fluid flow control device using this motor |
| JP059021/98 | 1998-02-24 | ||
| JP059021/1998 | 1998-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1234642A CN1234642A (en) | 1999-11-10 |
| CN1120557C true CN1120557C (en) | 2003-09-03 |
Family
ID=13101231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99102572A Expired - Fee Related CN1120557C (en) | 1998-02-24 | 1999-02-24 | Motor with friction mechanism and fluid-flow control apparatus using said motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3620816B2 (en) |
| KR (1) | KR100289421B1 (en) |
| CN (1) | CN1120557C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5004038B2 (en) * | 2010-05-10 | 2012-08-22 | 島津エミット株式会社 | Valve drive actuator |
| JP6581152B2 (en) * | 2017-06-23 | 2019-09-25 | 日信工業株式会社 | Electric actuator and electric parking brake device |
| JP7340378B2 (en) * | 2019-07-31 | 2023-09-07 | ニデックインスツルメンツ株式会社 | Valve body drive device |
-
1998
- 1998-02-24 JP JP05902198A patent/JP3620816B2/en not_active Expired - Fee Related
-
1999
- 1999-02-23 KR KR1019990005867A patent/KR100289421B1/en not_active IP Right Cessation
- 1999-02-24 CN CN99102572A patent/CN1120557C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3620816B2 (en) | 2005-02-16 |
| JPH11243663A (en) | 1999-09-07 |
| CN1234642A (en) | 1999-11-10 |
| KR19990072828A (en) | 1999-09-27 |
| KR100289421B1 (en) | 2001-05-02 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NIDEC SANKYO CORP. Free format text: FORMER NAME OR ADDRESS: SANKYO SEIKI MFG. SEISAKUSHO K.K. |
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| CP03 | Change of name, title or address |
Address after: Nagano Patentee after: Sankyo Seiki Seisakusho KK Address before: Nagano Patentee before: Sankyo Seiki Manufacturing Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030903 Termination date: 20180224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |