CN201072506Y

CN201072506Y - Electric device capable of implementing accurate displacement

Info

Publication number: CN201072506Y
Application number: CNU2007201755663U
Authority: CN
Inventors: 倪秦龙; 黄骉
Original assignee: NI QINLONG HUANG PIAO
Current assignee: NI QINLONG HUANG PIAO
Priority date: 2007-08-31
Filing date: 2007-08-31
Publication date: 2008-06-11
Anticipated expiration: 2017-08-31

Abstract

The utility model discloses an electrical actuator with precise displacement function, which comprises a motor, a reduction box, a counting gear, a second photoelectric detection unit, a displacement rod, a first photoelectric detection unit and a control unit. The reduction box is driven by the motor and comprises a high speed input end and a low speed output end; the counting gear is coupled with the high speed input end of the reduction box, and the gear body of the counting gear is provided with a plurality of centrosymmetricaly and equally distributed loopholes; the second photoelectric detection unit comprises a second light emitter and a second photo detector that are respectively arranged at both sides of the light holes part of the counting gear; the displacement rod is coupled with the lower speed end of the reduction box and is provided with a light shielding part; the first photoelectric detection unit comprises a first light emitter and a first light detector that are respectively positioned at both sides of a moving plane of the light shielding part of the displacement rod; the control unit is electrically connected to the control end of the motor and the output end of the second light detector.

Description

Can realize the electric device of precise displacement

Technical field

The utility model belongs to a kind of electric device, specifically, belongs to a kind of electric device of realizing precise displacement.

Background technology

Present electricity driving displacement control device generally adopts the mode of location recognition to control displacement, perhaps adopts the length of motor rotation time to control displacement.If how the mode that adopts the mode of location recognition to control displacement just needs the location recognition switch of respective numbers in the shift position, will there be apparatus system very complexity and the relatively poor shortcoming of reliability like this.And the length that adopts the motor rotation time is controlled the mode of displacement and is existed the systematic error size to rely on very much the shortcoming of the degree of accuracy of the degree of accuracy of rotating speed of motor and other parts.

The utility model content

A purpose of the present utility model is to solve weak point of the prior art, provides a kind of use device few, and the electric device of realized precise displacement simple in structure.

For achieving the above object, the electric device of precise displacement of realizing of the present utility model comprises

Motor;

By motor-driven reducer casing, comprise high speed input end and low speed output terminal;

Counting gear is coupled in the high speed input end of reducer casing, is provided with centrosymmetric and equally distributed a plurality of light holes on the gear mass of counting gear;

Second photodetector unit, comprise second luminescent device and the second device for testing light spare, be arranged at the both sides of the light hole part of counting gear respectively, to such an extent as to when light hole turns between second luminescent device and the second device for testing light spare, the light that second luminescent device sends can arrive the second device for testing light spare, produce a count pulse, the second device for testing light spare has an output terminal in order to the output count pulse;

Displacement bar is coupled in the low speed end of reducer casing, has the part that is in the light;

First photodetector unit, comprise first luminescent device and the first device for testing light spare, be arranged at the be in the light both sides of plane of movement of part of described displacement bar respectively, to such an extent as to when between light-blocking part componental movement to the first luminescent device and the first device for testing light spare, the light that first luminescent device sends is in the light partly to be stopped, can't arrive the first device for testing light spare, produce a reset pulse, the first device for testing light spare has an output terminal of consoling pulse in order to output; And,

Control module is electrically connected on the control end of motor, and is electrically connected on the output terminal of the second device for testing light spare, count pick up pulse and to its counting; Be electrically connected on the output terminal of the first device for testing light spare, receive reset pulse, and the control corresponding motor stop operating.

Preferably, described reducer casing can have an annular groove section, and first photodetector unit can be installed in this annular groove section, and the end of displacement bar can be stretched between the first interior photodetector unit of this annular groove section.

Operating principle of the present utility model is as follows: move to light-blocking part between second photodetector unit time when displacement bar prolongs its movement locus, second photodetector unit produces reset pulse to control module, and control module can be determined the initial position of displacement bar in view of the above.After having set the angle numerical value that needs rotation, control module can be determined the size of the count value preset according to the deceleration ratio of the printing opacity hole count of counting gear, reducer casing; After this drive motor rotates, and drives the counting gear rotation thereby drive reducer casing, when each light hole of counting gear passes through between first photodetector unit, produce a count pulse, control module receives this count pulse and counting, after reaching default count value, stops drive motor.Like this, just realized a precise displacement process.

The beneficial effects of the utility model are, owing to adopted the structure of photoelectric counting, have avoided using too much detection means, have also avoided depending on unduly high-precision motor simultaneously.In addition, because counting gear is coupled in the speed end of reducer casing, the angle value comparative counting gears of its each pulse representative is little when the low speed end, and therefore, when using same counting gear, bearing accuracy is higher.

Description of drawings

Fig. 1 is a structure vertical view of realizing the electric device of precise displacement described in the utility model.

Fig. 2 is a structure side view cutaway drawing of realizing the electric device of precise displacement described in the utility model.

Fig. 3 is the structure vertical view of counting gear described in the utility model.

Fig. 4 is the synoptic diagram of the relative position of the expression counting gear of the present utility model and second photodetector unit.

Embodiment

The utility model relates to a kind of electric device of realizing precise displacement, and the realization location in order to convenient and economic below in conjunction with accompanying drawing, elaborates to feature of the present utility model:

The electric device of the realized precise displacement in a kind of embodiment of the present utility model, with reference to Fig. 1,2, comprise reducer casing 1, reducer casing 1 is in order to be converted to the low moment of torsion output of high rotating speed of motor the output of the high moment of torsion of the slow-speed of revolution, comprise high speed input shaft 11 and low speed output shaft 12, its high speed input shaft 11 is by first, second, third, three grades of speed reducing gear pairs are coupled in low speed output shaft 12, wherein, first order gear pair, by the motor 2 that is coupled as devices such as shaft joints, be the high speed input end; Third level gear pair is coupled with displacement bar 3 by a fastener 31, is the low speed output terminal; Motor 2 is by 7 controls of a control module and driving.

One end of displacement bar 3 is coupled in the low speed output terminal, can have a kink 32 of rolling over down as light-blocking part by the other end, and the effect of displacement bar 3 is to provide the information of initial position.The inboard and the outside at the motion circumference of kink 32, quadrature be provided with first photodetector unit 4, first photodetector unit 4 can comprise a light emitting diode 41 and a photoelectric receiving tube 42, and the device that also can adopt other light trigger pip can be converted to electric pulse is right; Here, the set-up mode of light emitting diode, photoelectric receiving tube and kink also can adopt other angle settings, as long as guarantee that kink can keep off between light emitting diode and photoelectric receiving tube, the light that hinders light emitting diode arrives photoelectric receiving tube and gets final product.The output terminal of photoelectric receiving tube 42 links to each other with control module.Light emitting diode 41 and photoelectric receiving tube 42 form first light path, first light path can be stopped from the centre by the kink of displacement bar, when kink 32 is blocked between light emitting diode 41 and the photoelectric receiving tube 42, then control module 8 can detect the variation of pulse, produce the initial position pulse, and be changed to according to the position of determining displacement bar with this.And this position is defined as the initial position of displacement bar 3.

Described reducer casing 1 can have an annular groove section 13, the first photodetector unit 4 and can be installed in this annular groove section 13, and the end of displacement bar can be stretched in this annular groove section, between first photodetector unit 4.

Counting gear 5 is engaged in the first order gear of reducer casing.5 mechanism of counting gear comprises centrosymmetric setting as shown in Figure 3, and equally distributed a plurality of light hole 51, as being eight in this example.Second photodetector unit 6 that is provided with counting gear 5 quadratures, wherein, as shown in Figure 4, second photodetector unit can comprise a light emitting diode 61 and a photoelectric receiving tube 62, the device that also can adopt other light trigger pip can be converted to electric pulse is right, the output terminal of photoelectric receiving tube 62 is connected with control module 7, sees through the light of the light emitting diode 61 of light hole in order to reception, and export control module 8 to after being translated into count pulse.Light emitting diode 61 and photoelectric receiving tube 62 forms second light path, and itself and counting gear 5 quadratures.

Control module 7 is in order to receive the initial position pulse of first photodetector unit, 4 outputs, and second count pulse that send of photodetector unit 6, when receiving the initial position pulse, stop drive motor, when whenever receiving a count pulse, count a number.

Second photodetector unit 6 matches with counting gear to detect the rotational angle of displacement bar 3, and its angle determines that method is as follows:

If as shown in this example, counting gear has eight light holes 51, and it is coupled in the high speed input end of wheel box, as first order gear pair, the reduction gear ratio of supposing reducer casing is 100, be moving 100 circles of high speed input end revolution, the low speed output terminal, be that third level gear pair rotates 1 circle, so, when displacement bar rotation 180 is spent if desired, then need to make the motor that is coupled in the high speed input end to rotate 50 circles, be that counting gear need rotate 50 circles, so, the photoelectric receiving tube of counting Photoelectric Detection pipe need receive 400 light and shades to be changed, and is translated into 400 count pulses and output.Control module 7 begins counting from receiving first count pulse, when the count pulse number that receives has reached preset value, and promptly 400 o'clock, then stop drive motor 2, like this, just finished a displacement process.After this, can utilize other displacement bar of identical principle to reset, or the drive displacement bar rotate a new angle.

If control module 7 is beginning not receive the initial position pulse, then drive motor is till receiving the initial position pulse.

According to the foregoing description as can be seen, best use of the present utility model is to realize accurately swing offset, but those skilled in the art should know, after adding suitable gear train, as pinion and rack, helical gear pair etc., swing offset can be changed to straight-line displacement or other forms of displacement, device of the present utility model can accurately be realized above-mentioned form displacement equally.

In addition, the structure of displacement bar also can change, as long as guarantee to have the part that is in the light, and the plane of movement both sides that first photodetector unit is arranged at the part that is in the light respectively get final product.

Being the utility model preferred embodiment only in sum, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should belong to technology category of the present utility model.

Claims

1. the electric device that can realize precise displacement is characterized in that: comprise motor;

2. the electric device of realizing precise displacement according to claim 1, it is characterized in that: described reducer casing can have an annular groove section, displacement bar initial position Photoelectric Detection can be installed in this annular groove section pipe, and the interior displacement bar initial position Photoelectric Detection of this annular groove section can be stretched into between the pipe in the end of displacement bar.