CN1832306A

CN1832306A - Electromotor with speed reduce machanism

Info

Publication number: CN1832306A
Application number: CN 200510128614
Authority: CN
Inventors: 野口一男
Original assignee: TOKYO SPARE PARTS INDUSTRIAL Co Ltd
Current assignee: TOKYO SPARE PARTS INDUSTRIAL Co Ltd; Tokyo Parts Ind Co Ltd
Priority date: 2005-03-08
Filing date: 2005-11-22
Publication date: 2006-09-13
Also published as: JP4129875B2; JP2006254534A

Abstract

The present invention provides one kind of motor assembly with speed reducing mechanism. The motor assembly has one brushless motor with small size and low cost and one base plate set perpendicular to the rotating shaft plane of the motor, and on the base plate, there are Hell elements to detect the rotation speed of the rotor, one Hell element to detect the output shaft, one driving IC and one connector.

Description

The motor of band reducing gear

Technical field

The present invention relates to be used for the motor as the band reducing gear of actuator of the stream adjuster valve that for example drives the wiper arm of automobile or drive conditioner, relate in particular to and used the motor of brushless motor as the band reducing gear of motor.

Background technology

As the drive source of the barometric damper of employed wiper device of vehicles such as automobile or conditioner, use by electric motor driven actuator.This actuator is to have the band reducing gear motor that rotational delay with motor is the desirable rotating speed reducing gear that passes to output shaft.

The reducing gear of such actuator adopts the worm gear from the rotating shaft that is installed in motor to pass to straight spur gear, the structure by pinion deceleration rear drive output shaft.The bindiny mechanism or the stream adjuster valve that make the wiper arm action are installed on output shaft.

Precision is carried out oscillating motion better when making wiper arm or valve carry out oscillating motion, and such actuator need detect the position of rotation of output shaft.Therefore, the transducer of the anglec of rotation that is used to detect output shaft has been installed in the motor of band reducing gear.

Before this, in order to detect the position of rotation of output shaft, use with the reduction gearing of output shaft one rotation on be provided with brush as touch sensor, with near the tellite that this brush is installed to the reduction gearing on the structure of printed resistor figures (pattern) sliding contact of printing formation.

Perhaps, also use the structure of noncontacting proximity sensor as the position of rotation that detects output shaft.As the motor of such band reducing gear, known TOHKEMY 2002-262515 communique is disclosed such, is provided with the motor of the transducer of the absolute position that is used to represent output shaft.

This motor is, by detecting the relative position that the magnetic of being located at the multipole magnetized magnet on the motor rotation axis detects output shaft with Hall element, magnet is installed to the deceleration that is wholely set with output shaft with on the gear, the magnetic that detects this magnet with Hall element detects the absolute position of output shaft.

But, in the motor of band reducing gear,, need accurately set its initial position in order to detect the position of rotation of output shaft.And, generally require these devices that long-life, high reliability, high accuracy and low price will be arranged simultaneously.

In the structure of having used brush, owing to be contact, so long lifetime, high reliability are limited; Because the deviation of brush or printed resistor etc. makes the precisionization of initial position setting or position probing also limited.

Therefore use the structure of the non-contact detection of utilizing Hall element.This structure therefore have advantage aspect long lifetime and the high reliability, but transducer or prices such as magnet, testing circuit is higher, have the problem of low price aspect owing to be contactless.

[patent documentation 1] TOHKEMY 2002-262515 communique

Summary of the invention

The present invention is exactly in order to address the above problem, a kind of motor with reducing gear is provided, and it by the contactless long lifetime that reaches, makes assembling easily with simple structure with transducer, and the cost of inhibition transducer etc. is in the hope of low price, and structure is very compact.

In order to address the above problem, the motor of the band reducing gear of the solution of the present invention 1, it has uses the output shaft that is slowed down by the gear train of brushless motor driving, described brushless motor has the periphery rotor rotated at stator, it is characterized in that, comprise: rotating shaft one distolateral and drive the gear of said gear system that is set at above-mentioned motor, by this gear drive and in the end one-level have the gear train of output shaft, with rotating shaft direct cross be arranged on another distolateral tellite of the rotating shaft of above-mentioned motor, be set on this tellite and with above-mentioned epitrochanterian driving with the first relative Magnetic Sensor of annular magnet, detect the relative rotation angle of above-mentioned rotor by above-mentioned first Magnetic Sensor.

In this structure, owing to can will drive the Magnetic Sensor that brushless motor use and utilize the rotation detection circuit of this Magnetic Sensor to accommodate in the substrate of rotating shaft end one side that is configured in brushless motor, so structure be very simple square with the axisly.

And,, just can enough simple structures detect position of rotation accurately by as scheme 2, being provided with and the magnet of output shaft one rotation and the transducer that this magnet of detection is set on substrate.

And, if the structure of employing scheme 3 or scheme 4, by simple shape brushless motor or flat brushless motor, Magnetic Sensor, the rotation detection circuit that has utilized this Magnetic Sensor that the driving brushless motor can be used and the Magnetic Sensor that detects the rotation of output shaft are accommodated in the substrate that is configured in rotating shaft end one side square with the axisly.

And, if be adjacent to the configuration of substrate is arranged on the inboard of exterior body, then can provide the very motor of compact band reducing gear of profile with its wall.

The effect of invention

If the structure of the example that illustrated more than adopting, rotate the Magnetic Sensor of usefulness by Magnetic Sensor and detection that the common drive brushless motor is required, just can use of the control of the required Magnetic Sensor of brushless motor with the motor of reducing gear, therefore the magnetic sensor configuration that these Magnetic Sensors and detection output shaft can be rotated can provide the very motor of compact band reducing gear of structure on a substrate.

And, because by making substrate parallel with periphery wall or base plate and be adjacent to configuration, just can make the profile of the motor of being with reducing gear is rectangular shape, so the motor of the compacter band reducing gear of profile can be provided.

Description of drawings

Fig. 1 is the inside vertical view of motor of the band reducing gear of the present patent application.

Fig. 2 is the end view of the major part dissectd from cutting line A-A shown in Figure 1.

Fig. 3 is the structure of motor and substrate, is the profile of the major part of its end view.

Fig. 4 is the structure of motor and substrate, is the front view of seeing from the direction of its rotating shaft.

Fig. 5 is the block diagram of motor that is used to drive the band reducing gear of the present patent application.

Fig. 6 represents other examples of motor of the band reducing gear of the present patent application.

Embodiment

Implement preferred configuration of the present invention with the figure explanation below.

Fig. 1 and Fig. 2 represent the actuator 1 as an example of the motor of the band reducing gear of the present patent application, and Fig. 1 is its inner vertical view of expression, and Fig. 2 is for dissecing the end view of major part from cutting line A-A shown in Figure 1.Section is represented with hatching respectively.

Actuator 1 forms the box-shaped of approximate cuboid by lower house 2 and upper shell 3, and inside contains drive motor 22, becomes the worm gear 10 of reducing gear train, first idler gear 11, second idler gear 12, the 3rd idler gear 13, have the output gear 14 of output shaft 14c and with the substrate 21 of tellite (the Line substrate is joined in printing) formation.On substrate 21, constitute motor drive circuit described later, be used to detect the circuit of reduction gearing rotation etc.

Lower house 2 forms by the base plate 2a that constitutes the housing bottom surface and is formed at the tazza shape that the periphery wall 2b of the periphery of this base plate 2a forms, and periphery wall 2b is provided with and is used for this actuator 1 is installed to mounting flange 2d on the various devices.In order to make figure be convenient to watch, upper shell 3 dots its profile, omits its explanation.

Motor 22 is a brushless motor, is fixed on the assigned position of base plate 2a with the hold concurrently metal plate-like base 22b of holder of mounting panel.

The reducing gear train of this actuator 1 is made of the worm gear on the rotating shaft 22c that is installed to motor 22 10, first idler gear 11, second idler gear 12, the 3rd idler gear 13 and output gear 14.First idler gear 11, second idler gear 12 and the 3rd idler gear 13 are rotated respectively and are supported on the support hub 2h, the 2i that are formed on the base plate 2a, the 2j.

The gear wheel 11a and the pinion 11b of first idler gear 11 form as one, by the predetermined speed reducing ratio decision number of teeth.And second idler gear 12, the 3rd idler gear 13 are formed by gear wheel 12a and pinion 12b, gear wheel 13a and pinion 13b too.

Worm gear 10 is meshed with the gear wheel 11a of first idler gear 11, and pinion 11b is meshed with the gear wheel 12a of second idler gear 12.And second idler gear 12 and the 3rd idler gear 13 gear wheel and pinion respectively intermesh, the pinion 13b of the 3rd idler gear 13 and the gear wheel 14a of output gear 14 engagement.14 use straight spur gear and pinion from first idler gear 11 to output gear, and their rotating shaft is vertical and parallel to each other with base plate 2a.

The gear wheel 14a and the output shaft 14c of output gear 14 form as one by flange 14d, as the output shaft 14c of the rotating shaft of output gear by be arranged at perforate on the base plate 2a, promptly, output shaft bullport 2g you be rotated and be supported on the lower house 2.

On output shaft 14c, form perforate 14h with one heart and become tubular, and form card within it on the wall and only use lug 14g.This card only makes perforate 14h become the hole that the cross section is the D font with lug 14g, and the driven device (for example rotating shaft of the door of aircondition or the rotating shaft of wiper) with shape axle consistent with this hole shape is installed in wherein.

The structure of motor 22 and substrate 21 is described with Fig. 3 and Fig. 4 below.Fig. 3 is the major part cutaway view of its end view, the front view of Fig. 4 for seeing from the rotating shaft direction.

Motor 22 is a brushless motor, is made of rotor 22R and the stator 22S of outer transition.

Cylindric tube portion 221 and the tabular top part 222 usefulness magnetic holding plates of rotor 22R form as one, and in the center fixation of top part 222 rotating shaft 22c are arranged.Be fixed with in the inboard of tube portion 221 and be similarly driving cylindric, that along the circumferential direction alternately be magnetized to N, the S utmost point with magnet 223.

And, at the distolateral worm gear 10 that has been pressed into as described above of rotating shaft 22c, by installation such as bonding grade.

Stator 22S is made of the tubular retainer 224 of the central authorities that are installed to the base 22b that is processed into the magnetic holding plate that is approximately rectangle, the iron core 227 that is installed to the bearing 225 in this retaining member and is wound with coil 226, and iron core 227 is fixed on the outside of retainer 224.The rotating shaft 22c of rotor 22R can be supported on the stator rotatably with bearing 225.The structure of this motor 22 is an ordinary construction, omits its detailed explanation.

The substrate 21 that becomes with the face of rotating shaft 22c quadrature is installed on the face relative with rotor 22R of base 22b.This substrate 21 is a tellite, the driving of rotation that the

Hall element

31,32,33 of 3 rotations that are used for detection rotor and control motor 22 be installed on its face is with IC34 and be used to detect the Hall element 35 of the rotation of output shaft 14c, and they are with the predetermined pattern connection that is provided with on the real estate.

On substrate 21, also be equipped with and be used to import from the signal of actuator 1 outside or the connector 21b of electric power.Connector 21b is made of base 211 and a plurality of pin 212 with resinous cuboid, and pin 212 runs through base 211 ground by or riveted joint one-body molded with base 211 etc. to be installed.Base 211 is connected with substrate 21, and connector 21b becomes pedestal, and pin 212 runs through substrate and in the one side solder opposite with base 211.

Hall element

31,32,33 is gone up the driving of installing with rotor 22R and is used the end of magnet 223 relative, the rotation of detection rotor 22R.Hall element 35 usefulness lead-in wires 35a leaves at transducer 35b under the state of substrate 21 and installs, and transducer 35b is positioned at position relative with flange part 14d on the output gear 14.About these Hall elements with drive and to narrate in the back with the action of IC.

This substrate 21 is configured in the actuator not position with each gear tooth interference along the rotating shaft 22c of periphery wall 2b and motor with meeting at right angles.

And output gear 14 is relatively installed flat thin magnet 18 with the sensor part 35b of Hall element 35 by yoke iron slice 19 on flange part 14d.The N utmost point of flat thin magnet is magnetized along the direction parallel with output shaft by the polar region with the S utmost point, and Hall element 35 is only relative with a magnetic pole.Therefore, Hall element 35 waveform output that output shaft 14c is whenever rotated a circle and forms a pulse.Flat thin magnet 18 is installed in the card of output shaft 14c and only uses on the corresponding position of lug 14g.

Fig. 5 is the block diagram of the actuator 1 of driving said structure.With this figure the structure of drive IC 34 and the action of actuator 1 are described.

Drive IC 34 is made of drive division 341, control part 342 and power supply unit 343.

Drive division 341 usefulness amplifier 341a amplify detection output pulse Pu, Pv, the Pw of

Hall element

31,32,33 outputs, provide drive current from switch portion 341b to drive coil Lv, Lu and Lw.

Output pulse Pu, Pv in the amplifier output input to the count section 342a that is provided with in the control part 342, are used to detect the direction of rotation and the anglec of rotation.

Control part 342 comprises count section 342a and motor control part 342b, detects the rotation of motor with the pulse signal that inputs to count section 342a.Flat thin magnet 18 acts on the output pulse Pz that Hall element 35 produced and inputs to count section 342a by amplifier 341c.Count section 342a will export to motor control part 342b by the output L that output pulse Pu, Pv, Pz detect.

Motor control part 342b will be to detect output L and to serve as that the basis electric motor driven control signal L3 of control exports to switch portion 341b with the control signal L1 from the computer C input of the action of controlling this actuator 1 by count section 342a.In addition, control signal L1 is by connector 21b input.

In power supply unit 343, be provided with pressure 343b, will be by the supply voltage level pressureization of connector 21b from power supply V supply.The power source voltage Vcc that provides from power supply V is applied to motor driven portion 341, and driving amplifier 341a will provide drive current by switch portion 341b switch and to drive coil Lv, Lu and Lw.

And be depressured to predetermined voltage by pressure 343b and driven

Hall element

31,32,33 and Hall element 35 by the supply voltage Vs of level pressureization.This moment, pressure 343b controlled its driving with the control signal of computer C output.

Wherein, when making motor 22 rotations for the output shaft 14 that drives actuator 1, make this pressure 343b action and driving

Hall element

31,32,33,35.And, when stopping, motor also drives

Hall element

31,32,33,35.And control part 342 is also controlled, and drives when motor 22 stops.

By like this,, can detect because of interlock makes from

Hall element

31,32,33,35 and drive the pulse signal that produces with magnet 223 actions if when motor stops, making output shaft 14 misoperations for a certain reason.

Therefore, when wanting next drive motor 22, the error that can this misoperation of modifying factor produces and suitably rotation.

Fig. 6 represents the actuator 100 as other examples of the motor of band reducing gear of the present invention.Play the part of same function for the structure identical with actuator 1 and add identical Reference numeral, it illustrates omission.

Motor 220 is flat outer-rotor brushless motor, and its rotating shaft 220c is parallel with rotating shaft 2h, 2i, the 2j of idler gear.On this rotating shaft 220c, pinion 9 is installed, its rotation is passed to idler gear 11 by idler gear 15.

And substrate 210 is the same as with said structure with the metal plate-like base stator, parallel and adjacent setting with base plate 2a.And

Hall element

31,32,33 and 35 and drive and to be installed on the substrate 210 with IC34 makes the connector 21b that is installed on the substrate 210 pass periphery wall 2b installation with outside equally with being connected.

In addition, though be provided with the Hall element that drives with the magnetic of magnet 223 and detection flat thin magnet 18 in the above description, also can adopt to make the incorporate Hall IC of pulse shaper.And, though use the structure of concentric perforate to be illustrated, also can be from the outstanding output shaft of housing as example with output shaft, the present invention is not limited to the example that illustrated with example.

If the structure of the example that illustrated more than adopting, rotate the Hall element of usefulness by Hall element and detection that the common drive brushless motor is required, can use the required Hall element of brushless motor to carry out the control of actuator, the Hall element of these Hall elements with the rotation that detects output shaft can be configured on the substrate, therefore the motor of the band reducing gear of compact conformation can be provided.

And, because by parallel with periphery wall or base plate and be adjacent to placement substrate, just can make connector and substrate integrated, therefore can make the profile of the motor of band reducing gear is cuboid, has the more motor of the band reducing gear of compact profile so can provide.

Claims

1. motor with reducing gear, it has the output shaft of using the gear train that driven by brushless motor to slow down, and described brushless motor has the periphery rotor rotated at stator, it is characterized in that,

Comprise: gear is set at rotating shaft one distolateral of above-mentioned motor, and drives said gear system; Gear train, by this gear drive, and in the end one-level has output shaft; Tellite, with rotating shaft direct cross to be set at another of rotating shaft of above-mentioned motor distolateral; And first Magnetic Sensor, be set on this tellite, and with to be installed in above-mentioned epitrochanterian driving relative with annular magnet;

Detect the relative rotation angle of above-mentioned rotor by above-mentioned first Magnetic Sensor.

2. the motor of band reducing gear as claimed in claim 1 is characterized in that,

Also be provided with the magnet and second Magnetic Sensor, this magnet be set on the above-mentioned output shaft and with this output shaft one rotation, this second Magnetic Sensor is set on the aforesaid substrate and is relative with this magnet,

Detect the relative rotation angle of above-mentioned rotor by above-mentioned first Magnetic Sensor, and detect the absolute position of above-mentioned output shaft by above-mentioned second Magnetic Sensor.

3. motor with reducing gear, it has the output shaft of using the gear train that driven by brushless motor to slow down, and described brushless motor has the periphery rotor rotated at stator, it is characterized in that,

Comprise: gear is set at rotating shaft one distolateral of above-mentioned motor, and drives said gear system; Gear train, by this gear drive, and in the end one-level has output shaft; Tellite, with rotating shaft direct cross to be set at another of rotating shaft of above-mentioned motor distolateral; First Magnetic Sensor is set on this tellite, and with to be installed in above-mentioned epitrochanterian driving relative with annular magnet; Magnet is set on the above-mentioned output shaft, and rotates with this output shaft one; And second Magnetic Sensor, be set on the aforesaid substrate, and relative with this magnet;

Said gear system comprises: be fixed on first gear on the rotating shaft of motor, the 3rd gear that has the output gear of output shaft and constitute gear train between first gear and output gear;

First of constituting outer dress goes up above-mentioned the 3rd gear and the rotating shaft vertical with this face can support rotatably by being arranged on;

The rotating shaft of above-mentioned motor and the rotating shaft of said gear dispose with meeting at right angles, and above-mentioned tellite and the configuration of above-mentioned rotating shaft parallel ground.

4. motor with reducing gear, it has the output shaft of using the gear train that driven by brushless motor to slow down, and described brushless motor has the periphery rotor rotated at stator, it is characterized in that,

The rotating shaft parallel ground configuration of the rotating shaft of above-mentioned motor and said gear, the rotating shaft of above-mentioned tellite and said gear disposes with meeting at right angles.

5. the motor of band reducing gear as claimed in claim 3 is characterized in that,

Above-mentioned tellite and second adjacent setting, the outer dress of this second formation and above-mentioned first quadrature.

6. the motor of band reducing gear as claimed in claim 4 is characterized in that,

Above-mentioned tellite and above-mentioned first adjacent setting.