CN1148858C

CN1148858C - Transmission gear for electric motor

Info

Publication number: CN1148858C
Application number: CNB001316524A
Authority: CN
Inventors: 寺田芳明; 宪; 西川和宪
Original assignee: Nidec Sankyo Corp
Current assignee: Nagano
Priority date: 1999-10-07
Filing date: 2000-10-05
Publication date: 2004-05-05
Anticipated expiration: 2020-10-05
Also published as: JP2001112213A; KR20010039918A; KR100387976B1; CN1292595A

Abstract

The present invention relates to a motor actuator that is equipped with a motor, and an output shaft being rotated by the motor for driving and at the same time being interlocked to an operation member, and operates the operation member by the driving force of the motor, a cam being driven by the motor and switches being operated by the cam are provided, and the level of voltage being applied to the motor is changed according to the switching of the switches, thus allowing the operation mode of the operation member to vary. Said motor actuator reduces the number of parts for simplifying a device, and at the same time stabilizes the operation of a washing machine, a ventilating fan, or the like.

Description

Transmission gear for electric motor

Technical field

The present invention relates to the improvement of transmission gear for electric motor that washing machine drainage valve and ventilation fan shutter etc. is driven.

Background technology

In the past as the transmission gear for electric motor of the drive source of washing machine drainage valve and ventilation fan shutter etc. such as open the spy put down in writing among the flat 9-131021 etc. the multiple technologies scheme arranged like that.Below with Fig. 7 an example is wherein described.

Transmission gear for electric motor have casing that AC synchronous machine (only illustrating rotor 103 among Fig. 7), casing 101 and hood 102 form, with the revolving force of rotor 103 slow down the ratio wheel row mechanism 104, the output shaft 105 that transmit, be assembled in the ratio wheel row mechanism 104 and by connecting, cut off the clutch mechanism 107 that ratio wheel row mechanism 104 can be closed or throws off to the power supply of solenoid 106.

The clutch mechanism 107 and motor rotation driven in case close, then the revolving force of rotor 103 just is delivered to output shaft 105 by ratio wheel row mechanism 104, makes output shaft 105 rotations.Like this, the pulley 108 that is fixed on the output shaft 105 just rotates with output shaft 105 one, and steel cable 109 is rolled.But, be used to make the switch that rotor 103 stops and the institute of output shaft 105 to rotate interlock surely.That is, by with cam (not shown) the starting switch sheet of output shaft one rotation, make switch connection and disconnection.

And after steel cable 109 being rolled onto the action starting position, even stop to drive because of switch starting makes motor, owing to also continuing to the power supply of solenoid 106, so output shaft 105 is connected by ratio wheel row mechanism 104 with motor 103.Thereby, make steel cable 109 remain on volume and go up the position based on the braking moment of motor.

Stop to solenoid 106 power supplies clutch 107 being thrown off under this state, then steel cable 109 relative motors are free state, unclamp coiling owing to deadweight waits, and get back to the position before reeling.But, in the transmission gear for electric motor, when steel cable 109 returns, be installed in rubber brake 110 work in the ratio wheel row mechanism 104, can adjust the return action speed of steel cable 109.

Above-mentioned transmission gear for electric motor can make the position of rest of steel cable 109 be equipped with 2 patterns of coiling beginning and coiling end position by the structure of change switch, or increase a pattern that it is stopped in the centre position again, become 3 patterns, also rise to more pattern.That is, as long as clutch 107 closes when stopping motor-driven, then steel cable 109 just can remain on this position, and the start position that a plurality of switches are set just can make steel cable 109 have a plurality of stop positions.

But, above-mentioned traditional transmission gear for electric motor is that the clutch that switches on and off 107 that utilizes solenoid 106 has been installed in ratio wheel row mechanism 104, and the structure of relevant clutch mechanism 107 below is described in further detail.

Clutch mechanism 107 mainly by: the rotary body 112 of the plunger 111 that carrying moves up and down with switching on and off of solenoid 106, with this rotary body 112 to the spring 113 of plunger 111 side reinforcings, be configured in rotary body 112 and constitute at axial overlap and by the gear 114 of motor one side.

When solenoid 106 energising, plunger 111 and rotary body 112 overcome the elastic force of spring 113 and when pressing to the downside of Fig. 7, the ditch 114a that rotary body 112 embeds on the gears 114, and rotary body 112 can rotate in the circumferencial direction one with gear 114.On the contrary, when solenoid 106 outage, rotary body 112 is by the upside to Fig. 7 tried hard to recommend of spring 113, and rotary body 112 separates with gear 114.Like this, rotary body 112 just is in motor side and disconnects the state that is connected.Under this state, above-mentioned pulley 108 relative motors are in free state, and rotary body 112 rotates freely with the rotation of pulley 108.Its result, the rubber brake of being located on the rotary body 112 110 is also worked with the rotation of rotary body 112.

As mentioned above, traditional transmission gear for electric motor will utilize the clutch mechanism that switches on and off 107 of solenoid 106 to be installed in the ratio wheel row mechanism 104.Therefore need in the device to be provided with the various parts that constitute solenoid 106 and clutch mechanism 107 (keep solenoid 106 framework and plunger 111, also have rotary body 112, spring 113 and gear 114 etc.), the part number is many, device maximization and complicated, and Zhuan Zhi reliable in action is worrying simultaneously.

And, traditional motor transmission mechanism breaks away from clutch mechanism 107, when steel cable 109 is made return action because of its deadweight etc., in order to suppress the impact that this action brings, be provided with and take turns to 104 rotation speed governing so that the rubber brake 110 of the action low speedization of steel cable 109 to deceleration.The part number is further increased, install more complicated.

Summary of the invention

The object of the present invention is to provide and a kind ofly reduce the part number, make device oversimplify, make thus the transmission gear for electric motor of steady operations such as washing machine and ventilation fan.

For achieving the above object, the present invention is a kind of transmission gear for electric motor, have motor, rotate the output shaft that drives and be connected by motor with actuating member, drive actuating member by motor-driven power, be characterized in, at the divider resistance that switch is set and is driven by this switch in the motor current supply circuit of motor power supply, and described switch is by being subjected to described motor-driven cam driven, and described divider resistance can be connected on the current supply circuit along with the described switch of described cam driven.The applied voltage of motor increases when the switch non operating state, makes the actuating member action, and when switch work, then by divider resistance the applied voltage of motor is reduced, and actuating member is remained on the action starting position.

Another invention is to add the return device that makes actuating member return the action starting position on above-mentioned each transmission gear for electric motor, when switch connection, the actuating force of motor makes the actuating member structure overcome the recurrence power of return device and moves, when disconnecting, switch then powers to motor, to weaken the actuating force of motor through divider resistance.

Another invention is a value of setting resistance on above-mentioned each transmission gear for electric motor, so that revert to the recurrence dynamic balance of the return device of action starting position by the actuating force of the motor that applied voltage drove that passes through divider resistance with making actuating member.

Another invention is in above-mentioned each transmission gear for electric motor, in case cut off the power supply to motor, the recurrence power of return device just makes actuating member revert to the action starting position.

Another invention is in above-mentioned each transmission gear for electric motor, and motor uses the DC motor.

Another invention is in above-mentioned each transmission gear for electric motor, and switch is by forming with the cam of output shaft interlock and by the switch contact of this cam control.

Adopt above-mentioned each transmission gear for electric motor, in case to the motor power supply, then the revolving force of motor passes to actuating member, makes such as the draining of washing machine and opens valve.At this moment, switch starting switches the outer voltage swing that adds to motor.The action situation of actuating member is changed (such as the action that forwards simple maintenance from the action of rolling steel cable to).Even the present invention does not possess and utilizes solenoidal clutch in the conventional apparatus like this, can multiple variation take place by switching the action situation that makes actuating member to the voltage swing of supplying with motor also, available simple structure realizes the action same with tradition.

Description of drawings

Fig. 1 is the longitudinal section of the transmission gear for electric motor of the invention process form.

Fig. 2 is the vertical view after the hood of the transmission gear for electric motor of Fig. 1 and carriage are taken off.

Fig. 3 is the vertical view behind installation bracket on the transmission gear for electric motor of Fig. 1.

Fig. 4 is the motor current supply circuit figure of the transmission gear for electric motor of Fig. 1.

Fig. 5 is the partial cutaway vertical view that comprises the driven-mechanism of the actuating member that is driven by the transmission gear for electric motor of Fig. 1.

Fig. 6 is the variation of the transmission gear for electric motor of example of the present invention, is the vertical view that takes off behind the hood.

Fig. 7 is the broken section expanded view of conventional motors transmission device one example.

Embodiment

Followingly the embodiment of transmission gear for electric motor of the present invention is done an explanation according to Fig. 1 to Fig. 5.But this transmission gear for electric motor 1 is the draining valve that is used to drive washing machine.

Transmission gear for electric motor 1 of the present invention is different with traditional product, does not have the clutch mechanism that motor is connected, disconnects with output shaft.Transmission gear for electric motor 1 of the present invention is by switching switching on and off of the 1st, the 2nd switch 70a described later, 70b, switch the outer voltage swing that adds to DC motor force 14, make on the pulley that is connected with actuating member (being equivalent to connecting rod 87 described later) 50 volumes, or do pulley 50 is remained on the exercises that volume is gone up position etc.

The structure that realizes that this action is required below is described in detail in detail.Among Fig. 1 to Fig. 3, the casing 11 of transmission gear for electric motor 1 is by casing 11a and cover on this casing 11a and the hood 11b that is fixed on the casing 11a by tapping screw 11c constitutes.In this casing 11, be provided with DC motor 14 as the drive source motor that makes connecting rod 87 actions shown in aftermentioned Fig. 5.And on the motor output shaft 14a of this DC motor 14, be pressed into fixedly pinion 14b.

In addition, in casing 11, be provided with rotary driving force to DC motor 14 slow down ratio wheel row mechanism 20 that transmits and the output shaft 30 of accepting the actuating force of DC motor 14 by this ratio wheel row mechanism 20.Ratio wheel row mechanism 20 is by with the 1st gear part 21 of motor pinion 14b engagement, with the 2nd gear part 22 of the 1st gear part 21 engagements, constitute with the 3rd gear part 23 of the 2nd gear part 22 engagements.And the small diameter gear 23b of the 3rd gear part 23 and the engagement of the output gear 30a on the output shaft 30.

But, as shown in Figure 1, above casing 11 inner casing 11a, separate certain interval with casing 11a inner bottom surface intermediate plate 15 is set.Between the inner bottom surface and intermediate plate 15 of casing 11a, be provided with two ends and respectively be supported on axle 22c, 23c on casing 11a and the intermediate plate 15, the 2nd and the 3rd gear part 22,23 is being supported in each rotation freely on these 22c, 23c.

But, the 1st gear part 21 places gear wheel in large diameter 21a above the intermediate plate 15 in casing 11 as shown in Figure 1, and the small diameter gear 21b that will axially be oval tubular passes intermediate plate 15 and is provided with.The small diameter gear 21b of the 1st gear part 21 meshes at the gear wheel in large diameter 22a of the part of intermediate plate below 15 with above-mentioned the 2nd gear part 22.

This output shaft 30 as shown in Figure 1, its end portion has the output gear 30a that is configured in intermediate plate 15 downsides, simultaneously its upper end side is passed intermediate plate 15 and is passed hood 11b and protrudes up.Loose embedding cam 40 between intermediate plate on the output shaft 30 15 and hood 11b, one embeds the pulley 50 that drives connecting rod 87 usefulness described later on it.

As shown in Figure 2, cam 40 have outermost perimembranous 40a, become the 1st height portion pars intermedia 40b, become interior perimembranous 40c three parts of the 2nd height portion.On the position relative, be provided with 3

switch contacts

71,72,73 of the 1st and the

2nd switch

70a, 70b that formation switches the applied voltage of DC motor 14 with the outer peripheral face of this cam 40.In this example, a plurality of switches are arranged, with 3 kinds of pattern work, certainly also can 2 kinds of patterns of 1 switch or a plurality of switches are set with more pattern work.

Cam 40 roughly rotates 210 degree by the state (A-stage) on the part of pars intermedia 40b side slightly from the centre position that the bend 71a of switch contact 71 rides over cam outermost perimembranous 40a, rotation and opposite spin always arrived as shown in Figure 2, and bend 71a falls into the state (end-state) of interior perimembranous 40c.

These

switch contacts

71,72,73 root separately is fixed in the casing 11a, and leading section is driven by cam 40.When the outermost perimembranous 40a that switch contact 71 rides over cam 40 goes up, the leading section of switch contact 71 is to peripheral direction deflection and contact with switch contact 72 greatly, meanwhile, pushed by switch contact 71 and contact with the switch contact 73 of more lateral towards the switch contact 72 of outside deflection.Under this state, the 1st switch 70a that is made of

switch contact

72,73 reaches the position that the 2nd switch 70b that is made of

switch contact

71,72 is in connection.

Under the leading section of switch contact 71 state facing to the pars intermedia 40b landing of cam 40,

switch contact

71 and 72 front end deflection reduce, and the switch contact 72 of central authorities separates with the switch contact 73 in the outside.The 1st switch 70a that is made of

switch contact

72,73 is in the state of disconnection like this.And the 2nd switch 70b still keeps the state of connection.

When the 1st switch 70a disconnected, as shown in Figure 4, the voltage that adds to DC motor 14 via

lead

16a and 16b was to be undertaken by the resistance 17a that becomes the 1st divider resistance with regulation resistance value.Therefore the actuating force that drives DC motor 14 dies down.This moment, the value of resistance 17a just in time made DC motor 14 roll the actuating force of pulley 50 power that steel cable 53 is extracted out from pulley will to be balanced each other with effect because of aftermentioned drain valve mechanism 93.So just can make the aftermentioned actuating member remain on the action starting position.

Is by switching to lead 16a and 16c cam 40 to be rotated once more by

lead

16a and 16b to DC motor 14 applied voltages, the front of switch contact 71 is facing to the interior perimembranous 40c landing of cam 40, then switch contact 71 separates with switch contact 72, the 2nd switch 70b that is made of

switch contact

71,72 disconnects, and the 1st switch 70a also is off-state simultaneously.

In case the 2nd switch 70b disconnects, as shown in Figure 4, the voltage that adds to DC motor 14 is outward just undertaken by the resistance 17b that becomes the 2nd divider resistance with defined resistance value.Therefore the actuating force that drives DC motor 14 dies down once again.The value of resistance 17b just in time made actuating force that DC motor 14 will roll pulley 50 and the power that steel cable 53 is extracted out from pulley 50 will be balanced each other this moment.That is, in the present embodiment, the action double action that the lifting of recast member action and the position after lifting keep 2 times.

The transmission gear for electric motor 1 of this example be after the 1st and the

2nd switch

70a, 70b are in disconnection just the control by the external control device stop to DC motor 14 applied voltages.By stopping power supply, utilize return device that connecting rod 87 (see figure 5)s are returned, be that the recurrence power of spring 89 is pulled out steel cable 53 from pulley 50.

The reverse revolving force of direction when driving with pulley 50 is given the 3rd gear part the 23, the 2nd gear part the 22, the 1st gear part 21, motor output shaft 14a from output shaft 30 back transfer.Therefore, in DC motor 14 inside, utilize the braking force that the magnetic resistance that produces with motor output shaft 14a rotor rotated (not shown) is formed to play a role, the recurrence action of connecting rod 87 is by rotor speed regulation and slack-off.

Lead 16a, the 16b, the 16c that become to the power supply of DC motor 14 outwards pass from the inside of casing 11a, and these leads 16a, 16b, 16c are connected with the control device of double as external power source, and may command is to the power supply and the power failure of DC motor 14.And in casing 11a, as shown in Figure 4, have with the 1st and the

2nd switch

70a, 70b and respectively have

resistance

17a, 17b configuration in parallel, that become the 1st and the 2nd divider resistance of one's own.

But switch contact 71 as shown in Figure 2, have with the bend 71a of cam and butt, with the 71b of contact portion, the connecting portion 71c that is connected with the lead 16c that extends out to the outside and

resistance

17a, 17b of switch contact 72 contacts.In addition, switch contact 72 is made of the 72a of contact chip portion, the connecting portion 72b that is connected with DC motor 14 and resistance 17b with

switch contact

71,73 contacts.Switch contact 73 then is made of the 73a of contact portion, the connecting portion 73b that is connected with lead 16b that outwards extends out and resistance 17a with switch contact 72 contacts.

In addition,

resistance

17a, 17b arrange upright being located in the opening 15a that forms on intermediate plate 15.The upper end of resistance 17a (end of hood 11b side) is connected by the connecting portion 71c of sheet metal with the switch contact 71 that is configured in the most close cam 40 sides, its lower end (end of casing 11a side) then be connected the lead 16b that the external control device uses and connect.The upper end of resistance 17b then be connected the lead 16c that the external control device uses and connect, its lower end is connected with DC motor 14 by sheet metal.

The annexation of

switch contact

71,72,73 and

resistance

17a, 17b and DC motor 14 is shown in the motor current supply circuit of Fig. 4.One end of DC machine 14 is connected with external power source by lead 16a.And the other end of DC motor 14 is connected with switch contact 72 and resistance 17b.This resistance 17b and the 2nd switch portion 70b that is made of

switch contact

72,71 are connected in parallel, and when the 2nd switch portion 70b connected, nearly all electric current passed through from the 2nd switch portion 70b, flows through resistance 17b hardly.The other end of this resistance 17b be connected the lead 16c that external power source uses and connect.

As shown in Figure 4, the end of resistance 17a is connected on the switch contact 73 that can be connected, separate with switch contact 72.This resistance 17a and the 1st switch portion 70a that is made of

switch contact

72,73 are connected in parallel, and by

lead

16a and 16b power supply, meanwhile, electric current flowed hardly when the 1st switch portion 70a connected, and electric current passes through during disconnection.The other end of this resistance 17a be connected the lead 16b that external power source uses and connect.

Be connected the pulley 50 of output shaft 30 fore-ends, its hub portion embeds in the axis hole of hood 11b, prevents slippage by anti-avulsion spring 51 simultaneously.The carriage 52 that double as covers the pulley cover of this pulley 50 is installed on the casing 11.This carriage 52 becomes the installation portion between this device and other members.

As shown in Figure 2, in the pulley 50, an end of steel cable 53 is connected with brake 53a.And the other end of steel cable 53 as shown in Figure 5, is connected with connecting rod 87 as actuating member in the drain valve mechanism 93 by intermediate plate 81 and connecting band 88.

On housing 85, form water inlet 82 and outlet 84, in the thrust of spring 89 the end 85a of bellows 85 is pressed against under the state on the inclined wall 83a of housing 83 partition between water inlet 82 and the discharge outlet 84.That is, spring 89 becomes the return device that the connecting rod 87 that makes as actuating member revert to action starting position (making the position of partition between water inlet 82 and the discharge outlet 84).

As shown in Figure 5, in case the rotation of pulley 50 drives steel cable 53 is wound up on the pulley 50, connecting rod 87 is pulled and the thrust that overcomes spring 89 makes the end 85a of bellows 85 leave the inclined wall 83 of housing 83, and the water that enters from water inlet 82 is by discharge outlet 84 drainings.

Above-mentioned example is an example of the preferable example of the present invention, but is not limited to this, can carry out various distortion and implement in aim scope of the present invention.Such as, in above-mentioned example, be that the connecting rod 87 as actuating member is connected with the front of steel cable 53, and by going up steel cable 53 and drivening rod 87 with pulley 50 volumes, the mechanism that still drives actuating member also can use structure shown in Figure 6.

That is, as shown in Figure 6, but will be arranged on the output shaft 30 the output gear 30a one rotation that this output shaft 30 can mesh along with the 3rd gear part 23 with 20 last grades in ratio wheel row mechanism rotatably in otch gear 35 one that circumferencial direction partly excises.Also available have can replace above-mentioned steel cable 53 with the rack-and-pinion gear 36 that this otch output gear 35 is connected, breaks away from and be connected with actuating member.But in structure shown in Figure 6, cam the 40, the 1st and the

2nd switch

70a, 70b and other mechanical mechanism and motor current supply circuit are identical with above-mentioned example.

Adopt the structure of above-mentioned Fig. 6, can not cut off power supply to DC motor 14, drive but allow otch gear 35 continue rotation,, and utilize the recurrence power of actuating member to make actuating member return original position with the engagement of disconnection rack-and-pinion gear 36a and otch gear 35.But, when carrying out such control, the formed braking of the magnetic resistance in the DC motor 14 is inoperative, so as will utilize brake to reduce to return noise the time, preferably identical with above-mentioned example, make actuating member return original position by the power supply of cutting off to DC motor 14.

In above-mentioned example, the balance between " weak " actuating force by DC motor 14 and the recurrence power of actuating member keeps the position of rotation of cam 40, but also can be uneven.That is, also can make " weak " driving force ratio recurrence power of DC motor 14 strong slightly, more gently roll up during than use " by force " actuating force.

It is more weak also can to make " weak " driving force ratio return power, and the pulley 50 on the temporary transient volume is slowly unclamped.

In addition, switch contact can be established more than 4, and Dui Ying height portion also can establish more than 3 therewith.Also can switch contact be set, also or with the part of a plurality of switch contacts be used for other function at 2 places of cam 40 both sides.

The recurrence of cam 40 also can not utilize the such spring force of spring 89 of draining valve 93 in addition, can forward and reverse motor rotating and use, and switching on once more to this motor makes its counter-rotating.In addition, also can be without DC motor 14 the sort of general direct current machines, but adopt pulse motor or the such alternating current machine of small-sized AC synchronous machine resemble the stepping motor.

As mentioned above, transmission gear for electric motor of the present invention switches the outer voltage swing that adds to motor by the switching of switch, so that the pattern of actuating member changes.Therefore the present invention no longer needs traditional solenoidal clutch that utilizes, and can reduce the parts number device is simplified.

That is,, can carry out the lifting action, the locational maintenance after lifting of actuating member, slowly action such as promote or slowly put down by diverter switch.Therefore, as this transmission gear for electric motor is used as the draining valve drive unit of washing machine or the drive unit of ventilation fan shutter, can carry out multiple action, becoming can the device corresponding with various modes.

In addition, as being drive source, and in the wheel row, do not establish clutch,, and the rotor of DC motor is rotated with the external force that comes from the actuating member side then by stopping power supply to the DC motor with the DC motor.Can implement the braking of appropriateness like this to the action of actuating member, and when being used for various device, this device becomes the stable device of peace and quiet, do not have impact noise that the action of actuating member causes etc.Its result no longer needs the rubber brake of conventional apparatus in the device, can reduce parts.Have again, by constituting, just can further guarantee the interlock between switch and cam with the cam of output shaft interlock rotation and the switch contact that controlled by this cam as switch.

Claims

1. transmission gear for electric motor, have motor, rotate the output shaft that drives and be connected by this motor with actuating member, actuating force by above-mentioned motor drives described actuating member, it is characterized in that, at the divider resistance that in the motor current supply circuit of described motor power supply, switch is set and drives by this switch, and described switch is by being subjected to described motor-driven cam driven, and described divider resistance can be connected on the current supply circuit along with the described switch of described cam driven.

2. transmission gear for electric motor according to claim 1, it is characterized in that, have and make described actuating member revert to the return device of action starting position, during described switch connection, the actuating force of described motor makes described actuating member overcome the recurrence power of described return device and moves, when described switch disconnects, power to described motor through described divider resistance, simultaneously to weaken the actuating force of described motor.

3. transmission gear for electric motor according to claim 2, it is characterized in that, set the value of described divider resistance, make the actuating force that is subjected to the motor that applied voltage drives by described divider resistance and make described actuating member revert to the recurrence dynamic balance of the described return device of described action starting position.

4. transmission gear for electric motor according to claim 2 is characterized in that, in case cut off the power supply to described motor, the recurrence power of described return device just makes described actuating member revert to described action starting position.

5. transmission gear for electric motor according to claim 1 is characterized in that, described motor is the DC motor.

6. transmission gear for electric motor according to claim 1 is characterized in that, described switch is made of the switch contact of described cam control.