CN103929012A - Linear actuator with microswitch limiting stopper - Google Patents

Linear actuator with microswitch limiting stopper Download PDF

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Publication number
CN103929012A
CN103929012A CN201310689341.XA CN201310689341A CN103929012A CN 103929012 A CN103929012 A CN 103929012A CN 201310689341 A CN201310689341 A CN 201310689341A CN 103929012 A CN103929012 A CN 103929012A
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China
Prior art keywords
sensitive switch
electric pushrod
guide pipe
nut
limit
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CN201310689341.XA
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Chinese (zh)
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CN103929012B (en
Inventor
申韬
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SHANGHAI SUNTUO MOTOR CO Ltd
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SHANGHAI SUNTUO MOTOR CO Ltd
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Abstract

The invention discloses a linear actuator with a microswitch limiting stopper. The linear actuator comprises a motor bushing, a drive motor, a planet reduction gearbox, a connecting sleeve, a guide pipe, a telescopic pipe and the microswitch limiting stopper. The drive motor and the planet reduction gearbox are arranged in the motor bushing and combined together. The connecting sleeve is connected with the motor bushing and the guide pipe. The planet reduction gearbox is connected with the connecting sleeve. The telescopic pipe is assembled in the guide pipe. A transmission lead screw and a nut are arranged in the guide pipe and connected with an output shaft of the planet reduction gearbox. The nut is connected with the telescopic pipe. The transmission lead screw is located in the telescopic pipe. The microswitch limiting stopper is installed at the end, close to the planet reduction gearbox, in the guide pipe. According to the structure of the linear actuator, the microswitch limiting stopper is compact in size and easy to install. The linear actuator solves the problem that the microswitch limiting stopper is difficult to install internally.

Description

A kind of orthoscopic electric pushrod with sensitive switch stop
Technical field
The present invention relates to electric pushrod field, relate in particular to a kind of orthoscopic electric pushrod with sensitive switch stop.
Background technology
Electric pushrod, English name Linear Actuator, claims again push-rod electric machine, electric cylinder and linear actuators.Electric pushrod is a kind of reciprocating power-jdriven gear that rotatablely moving of motor is changed into push rod, comprise orthoscopic electric pushrod, vertical electric push rod and run-in index electric pushrod, can in various simple or complicated technological processes, use as carrying out machinery, to realize far distance controlled, centralized control or automatically to control.Electric pushrod also can be divided into trapezoidal screw formula, ball wire rod-type, planetary ball screw-type and planetary roller screw by leading screw form, also can be divided into DC motor type (12/24/36V), alternating current machine formula (220/380V), step motor type and servo electric machine type etc. by motor type.
Spacing for the motion repeatedly of electric pushrod is carried out, generally adopt microswitch structure to realize the restriction of the movement travel to electric pushrod in electronic mode.For rectilinear or run-in index electric pushrod; due to own volume when the structural design and installing space larger; therefore mostly adopt the form of built-in sensitive switch stop; but traditional orthoscopic electric pushrod is because volume is smaller; stop adopts sensitive switch embedding structure to be relatively difficult to assembling, be mostly therefore push rod tail end current overload protection circuit is installed or in peripheral control unit the mode of built-in overload current protective circuit realize spacing.
But; stall when overload current protective circuit needs motor to extreme position; overload protecting circuit is again according to motor overload current limit; provide instruction by controller and make motor stalling; it is very high that this traditional electrical minor construction of switch designs the life requirements of component of machine material to electric pushrod and intensity; ubiquity can make motor shortening in useful life; mechanical transmissioning piece is the easily defect such as impaired of transmission nut particularly; simultaneously; although overload current protective circuit is technology ripe and that generally applied, also has high cost and safety issue.
Therefore, need a kind of novel orthoscopic electric pushrod structure, can in current limited push rod inner space, limit with the movement travel to push rod by built-in sensitive switch stop, control cost thereby can save, can reduce again technical difficulty.
Summary of the invention
Stroke Control device life-span for existing orthoscopic electric pushrod is low, cost is high and have the problem of potential safety hazard, the invention provides a kind of novel orthoscopic electric pushrod with sensitive switch stop, by the internal structure of appropriate design orthoscopic electric pushrod, sensitive switch stop is built in orthoscopic electric pushrod and becomes possibility, improve cost performance and the security performance of orthoscopic electric pushrod, widened the application market of orthoscopic electric pushrod.
To achieve these goals, the invention provides a kind of orthoscopic electric pushrod with sensitive switch stop, described orthoscopic electric pushrod comprises motor sleeve pipe, drive motors, planetary reduction box, adapter sleeve, guide pipe, telescoping tube and sensitive switch stop, motor sleeve pipe is built-in with drive motors and the planetary reduction box combined, adapter sleeve connects motor sleeve pipe and guide pipe, planetary reduction box is connected with adapter sleeve, telescoping tube is assembled in guide pipe, in guide pipe, there are the drive lead screw and the nut that connect planetary reduction box output shaft, nut is connected with telescoping tube, drive lead screw is positioned at telescoping tube, the inner one end near planetary reduction box of guide pipe is provided with sensitive switch stop.
Alternatively, sensitive switch stop is fixed on drive lead screw, and sensitive switch stop also comprises wiring board assembly, and described wiring board assembly comprises the first fixed head and second fixed head of mutual fastening; Sensitive switch stop also comprises upper and lower position limited inching switch, described upper and lower position limited inching switch comprises upper limit sensitive switch and lower limit sensitive switch, be separately fixed on the first fixed head and the second fixed head, upper and lower position limited inching switch is by fetching with being electrically connected of wiring board assembly the running of controlling drive motors, to control the stroke of expansion link operation, wherein, motor sleeve pipe is down direction with respect to the direction of guide pipe.
Alternatively, guide pipe inwall is provided with draw-in groove, and draw-in groove is embedded with the flat pull bar that pulls upper limit sensitive switch handle, is provided with the boss towards drive lead screw on flat pull bar, and upper limit sensitive switch place is provided with the Compress Spring of effect flat pull bar; In the time that nut comes downwards to lower limit sensitive switch position, nut lower surface presses the handle of lower limit sensitive switch, lower limit sensitive switch closure, and telescoping tube is descending limited and out of service; In the time that nut goes upward to the position of boss of flat pull bar, nut upper surface drives flat pull bar to move, and pulls upper limit sensitive switch handle, upper limit sensitive switch closure, and telescoping tube is up limited and out of service; In the time that drive motors commutates, nut is again reverse when descending, and Compress Spring effect flat pull bar moves down and make upper limit sensitive switch to reset, and orthoscopic electric pushrod continues back and forth operation.
Alternatively, planetary reduction box uses screw to be connected with adapter sleeve, and motor sleeve pipe tail end has afterbody pull head, in the output shaft of planetary reduction box, adopt hexagon ring connection for transmission screw mandrel, drive lead screw is trapezoidal drive lead screw, and telescoping tube front end has anterior pull head, and guide pipe is connected by screw thread with motor sleeve pipe.
The present invention is owing to having adopted technique scheme, thereby have the following advantages: the orthoscopic electric pushrod with sensitive switch stop of the present invention, in Stroke Control, generally all only need to control and 2 positions of range at 0 based on orthoscopic electric pushrod, this Stroke Control characteristic is more suitable for sensitive switch stop and carries out spacing situation, by the internal structure of appropriate design orthoscopic electric pushrod, sensitive switch stop is successfully built in orthoscopic electric pushrod, for producer is cost-saving time, convenient for users to use, reduce taking up room and applying difficulty of orthoscopic electric pushrod.
Brief description of the drawings
Fig. 1 is the external structure schematic diagram of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention;
Fig. 2 is the internal structure schematic diagram of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention;
Fig. 3 is the structural representation of the sensitive switch stop of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention;
Fig. 4 is the Stroke Control guiding schematic diagram of the sensitive switch stop of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
First, please refer to Fig. 1, Fig. 1 is the external structure schematic diagram of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention, from outside, the main body of described orthoscopic electric pushrod is made up of motor sleeve pipe, adapter sleeve and guide pipe, and adapter sleeve connects motor sleeve pipe and guide pipe.
Then, please refer to Fig. 2, Fig. 2 is the internal structure schematic diagram of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention, from inside, described orthoscopic electric pushrod comprises motor sleeve pipe 19, drive motors 1, planetary reduction box 2, adapter sleeve 20, guide pipe 14, telescoping tube 15 and sensitive switch stop, motor sleeve pipe 19 is built-in with drive motors 1 and the planetary reduction box 2 combined, adapter sleeve 20 connects motor sleeve pipe 19 and guide pipe 14, planetary reduction box 2 is connected with adapter sleeve 20, telescoping tube 15 is assembled in guide pipe 14, in guide pipe 14, there are the drive lead screw 13 and the nut 12 that connect planetary reduction box 2 output shafts, nut 12 is connected with telescoping tube 15, drive lead screw 13 is positioned at telescoping tube 15, the inner one end near planetary reduction box 2 of guide pipe 14 is provided with sensitive switch stop.
Wherein, planetary reduction box 2 uses screw to be connected with adapter sleeve 20, motor sleeve pipe 19 tail ends have afterbody pull head 18, in the output shaft of planetary reduction box 2, adopt hexagon ring connection for transmission screw mandrel 13, drive lead screw 13 is trapezoidal drive lead screw, telescoping tube 15 front ends have anterior pull head 17, and guide pipe 14 is connected by screw thread with motor sleeve pipe 19.
Subsequently, please refer to Fig. 3, Fig. 3 is the structural representation of the sensitive switch stop of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention, sensitive switch stop is positioned at orthoscopic electric pushrod inside and is fixed on drive lead screw 13, sensitive switch stop also comprises wiring board assembly 9, and described wiring board assembly 9 comprises the first fixed head 8 and second fixed head 7 of mutual fastening; Sensitive switch stop also comprises upper and lower position limited inching switch, described upper and lower position limited inching switch comprises upper limit sensitive switch 5 and lower limit sensitive switch 10, be separately fixed on the first fixed head 8 and the second fixed head 7, upper and lower position limited inching switch is by fetching with being electrically connected of wiring board assembly 9 running of controlling drive motors 1, the stroke moving to control expansion link 15, wherein, motor sleeve pipe 19 is down direction with respect to the direction of guide pipe 14.
Finally, please refer to Fig. 4, Fig. 4 is the Stroke Control guiding schematic diagram of the sensitive switch stop of a kind of orthoscopic electric pushrod with sensitive switch stop of the present invention, guide pipe 14 inwalls are provided with draw-in groove, draw-in groove is embedded with the flat pull bar 11 that pulls upper limit sensitive switch 5 handles, on flat pull bar 11, be provided with the boss towards drive lead screw 13, upper limit sensitive switch 5 places are provided with the Compress Spring 6 of effect flat pull bar 11; In the time that nut 12 comes downwards to lower limit sensitive switch 10 position, nut 12 lower surfaces press the handle of lower limit sensitive switch 10, and lower limit sensitive switch 10 is electrically closed, and telescoping tube 15 is descending limited and out of service; In the time that nut 12 goes upward to the position of boss of flat pull bar 11, nut 12 upper surfaces drive flat pull bar 11 to move, and pull upper limit sensitive switch 5 handles, and upper limit sensitive switch 5 is electrically closed, and telescoping tube 15 is up limited and out of service; In the time that drive motors 1 commutates, nut 12 is again reverse when descending, and Compress Spring 6 acts on flat pull bar 11 and moves down and make upper limit sensitive switch 5 to reset, and orthoscopic electric pushrod continues back and forth operation.
In addition, electric pushrod is a kind of novel electric operator, and the novel actuator of one that electric pushrod is mainly made up of mechanisms such as motor, push rod and control device, can realize far distance controlled, centralized control.The operation principle of electric pushrod is, motor is after gear reduction, drive a pair of feed screw nut, the motion that is in line of the rotation motion of motor, utilize motor forward/backward rotation to complete push rod action, as can be completed the compound actions such as rotation, shake by mechanisms such as various levers, rocking bar or connecting rods, by changing lever arm of force length, can increase or strengthen stroke.Electric pushrod is made back and forth movement in certain limit stroke, and general electric pushrod standard stroke is 100,150, and 200,250,300,350 or 400mm, special stroke also can be customized according to the design of different application conditional request.Electric pushrod can design according to different application load the electric pushrod of different thrusts, general its maximum thrust can reach 6000N, no-load running speed is 4mm~35mm/s, electric pushrod is taking 24V/12V direct current permanent magnet motor as power source, rotatablely moving of motor is converted into reciprocating motion, promotes one group of linkage and complete the switch operatings such as air door, valve, gate, baffle plate.Adopt electric pushrod not only can reduce and adopt required compressed air source unit and the auxiliary equipment of pneumatic actuator as actuator, also can reduce the weight of actuator.Pneumatic actuator all needs there is certain air pressure in whole controlling run process, although can adopt amplifier that consumption is little etc., accumulates over a long period, and air consumption is still huge.Adopt electric pushrod actuator, in the time changing control aperture, need power supply, in the time reaching required aperture, just can no longer power, therefore from energy-conservation, there is obvious energy-conservation advantage in electric pushrod actuator than pneumatic actuator.Be applicable to remote operation and be widely used in keying, material handling, flow control of the mechanisms such as the air door, valve, gate of the departments such as electric power, chemical industry, metallurgy, mine, light industry, traffic, boats and ships etc.Now replaced the automatics of mechanism's hand, hydraulic valve, reduction gearing mechanism with him by increasing department.
In addition, assembly refers to the entirety that a series of products form, and is the general name that realizes the parts system of a specific function.General name, is also the meaning of aggregate, and for example, the driving-shaft assembly on automobile, refers to, and the set of various power transmission shaft correlated parts can realize transmission of power.Therefore, wiring board assembly refers to, and the set of the components and parts that various wiring boards are relevant is the aggregates that can realize electrical control.
Those skilled in the art will recognize that; above-mentioned embodiment is exemplary; in order to make those skilled in the art can better understand this patent content; should not be understood as the restriction to this patent protection range; change or modify as long as disclose spiritual any being equal to of doing according to this patent, all fall into this patent protection range.

Claims (4)

1. the orthoscopic electric pushrod with sensitive switch stop, it is characterized in that, described orthoscopic electric pushrod comprises motor sleeve pipe, drive motors, planetary reduction box, adapter sleeve, guide pipe, telescoping tube and sensitive switch stop, described motor sleeve pipe is built-in with described drive motors and the described planetary reduction box combined, described adapter sleeve connects described motor sleeve pipe and described guide pipe, described planetary reduction box is connected with described adapter sleeve, described telescoping tube is assembled in described guide pipe, in described guide pipe, there are the drive lead screw and the nut that connect described planetary reduction box output shaft, described nut is connected with described telescoping tube, described drive lead screw is positioned at described telescoping tube, the inner one end near described planetary reduction box of described guide pipe is provided with described sensitive switch stop.
2. orthoscopic electric pushrod according to claim 1, is characterized in that, described sensitive switch stop is fixed on described drive lead screw, and described sensitive switch stop also comprises:
Wiring board assembly, comprises the first fixed head and second fixed head of mutual fastening;
Upper and lower position limited inching switch, comprise upper limit sensitive switch and lower limit sensitive switch, be separately fixed on described the first fixed head and described the second fixed head, described upper and lower position limited inching switch is by fetching with being electrically connected of described wiring board assembly the running of controlling described drive motors, to control the stroke of described expansion link operation, wherein, described motor sleeve pipe is down direction with respect to the direction of described guide pipe.
3. orthoscopic electric pushrod according to claim 2, is characterized in that:
Described guide pipe inwall is provided with draw-in groove, described draw-in groove is embedded with the flat pull bar that pulls described upper limit sensitive switch handle, on described flat pull bar, be provided with the boss towards described drive lead screw, described upper limit sensitive switch place is provided with the Compress Spring of effect flat pull bar;
In the time that described nut comes downwards to described lower limit sensitive switch position, described nut lower surface presses the handle of described lower limit sensitive switch, described lower limit sensitive switch closure, and described telescoping tube is descending limited and out of service;
In the time that described nut goes upward to the position of boss of flat pull bar, described nut upper surface drives flat pull bar to move, and pulls described upper limit sensitive switch handle, described upper limit sensitive switch closure, and described telescoping tube is up limited and out of service;
In the time of the commutation of described drive motors, described nut is again reverse when descending, and described Compress Spring effect flat pull bar moves down and make described upper limit sensitive switch to reset, and described orthoscopic electric pushrod continues back and forth operation.
4. according to the arbitrary described orthoscopic electric pushrod of claim 1-3, it is characterized in that:
Described planetary reduction box uses screw to be connected with described adapter sleeve, described motor sleeve pipe tail end has afterbody pull head, in the output shaft of described planetary reduction box, adopt hexagon ring connection for transmission screw mandrel, drive lead screw is trapezoidal drive lead screw, described telescoping tube front end has anterior pull head, and described guide pipe is connected by screw thread with described motor sleeve pipe.
CN201310689341.XA 2013-12-16 2013-12-16 A kind of orthoscopic electric pushrod with microswitch stop Active CN103929012B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105226875A (en) * 2015-10-28 2016-01-06 温州市惠丰电器有限公司 Intelligent telescopic bar
CN106050635A (en) * 2016-08-16 2016-10-26 南京英达公路养护车制造有限公司 Manual variable displacement pump control system
CN106236497A (en) * 2016-09-06 2016-12-21 上海荣泰健康科技股份有限公司 A kind of arm and the adjustable massage armchair of shoulder position width
CN106877561A (en) * 2017-03-01 2017-06-20 江苏国电铁塔有限公司 Electric pushrod and its protection device and guard method
CN109573879A (en) * 2018-12-28 2019-04-05 北京术锐技术有限公司 It is a kind of for carrying the trolley elevating mechanism of operation tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001054255A (en) * 1999-08-06 2001-02-23 Namiki Precision Jewel Co Ltd Linear-drive micro actuator
CN201821204U (en) * 2010-09-12 2011-05-04 上海舜拓电机有限公司 Linear motor-driven push rod
CN202100671U (en) * 2011-06-17 2012-01-04 宁波迪麦格磁电科技有限公司 Electric pushing rod
CN203608013U (en) * 2013-12-16 2014-05-21 上海舜拓电机有限公司 Linear-type linear actuator with micro switch stopper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001054255A (en) * 1999-08-06 2001-02-23 Namiki Precision Jewel Co Ltd Linear-drive micro actuator
CN201821204U (en) * 2010-09-12 2011-05-04 上海舜拓电机有限公司 Linear motor-driven push rod
CN202100671U (en) * 2011-06-17 2012-01-04 宁波迪麦格磁电科技有限公司 Electric pushing rod
CN203608013U (en) * 2013-12-16 2014-05-21 上海舜拓电机有限公司 Linear-type linear actuator with micro switch stopper

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105226875A (en) * 2015-10-28 2016-01-06 温州市惠丰电器有限公司 Intelligent telescopic bar
CN106050635A (en) * 2016-08-16 2016-10-26 南京英达公路养护车制造有限公司 Manual variable displacement pump control system
CN106236497A (en) * 2016-09-06 2016-12-21 上海荣泰健康科技股份有限公司 A kind of arm and the adjustable massage armchair of shoulder position width
CN106877561A (en) * 2017-03-01 2017-06-20 江苏国电铁塔有限公司 Electric pushrod and its protection device and guard method
CN109573879A (en) * 2018-12-28 2019-04-05 北京术锐技术有限公司 It is a kind of for carrying the trolley elevating mechanism of operation tool

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