CN104702042A - Round tube type electric push rod - Google Patents
Round tube type electric push rod Download PDFInfo
- Publication number
- CN104702042A CN104702042A CN201310662306.9A CN201310662306A CN104702042A CN 104702042 A CN104702042 A CN 104702042A CN 201310662306 A CN201310662306 A CN 201310662306A CN 104702042 A CN104702042 A CN 104702042A
- Authority
- CN
- China
- Prior art keywords
- electric pushrod
- hollow sleeve
- nut
- switch
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
- H02K7/061—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses
- H02K7/063—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses integrally combined with motor parts, e.g. motors with eccentric rotors
Abstract
An electric push rod comprises a hollow sleeve, wherein a motor, a screw, a nut and a driving tube are arranged in the hollow sleeve; the screw is fixedly connected with the motor; the nut is in threaded connection with the screw; the driving tube is fixedly connected with the nut sleeved on the screw; a switch mounting groove is formed in the inner wall of the hollow sleeve along the axial direction of the hollow sleeve; a switch strip is fixedly arranged in the switch mounting groove; and two limiting switches are respectively arranged in the front of the switch strip and at the rear of the switch strip, and are triggered by the triggering blocks on the nut. The electric push rod is technologically machined and assembled easily, and can be accurately controlled at a travel extreme position, and a travel error is controlled in a range from minus 2mm to 2mm; and the electric push rod is small in occupation space, light in weight, simple, gorgeous and attractive in appearance and high in airtightness.
Description
Technical field
The present invention relates to a kind of device for rotary motion being converted to straight reciprocating motion, being specifically related to a kind of electric pushrod.
Background technology
Electric pushrod is a kind of low energy consumption, pollution-free, low noise Linear actuator, is widely used in the fields such as medicine equipment, furniture sofa, industrial instrument, home decoration decoration.Along with quality of life improves constantly, the consumption idea of people changes, and the intelligentized push rod in middle and high end progressively enters the application of family and scientific and technological industry, this series products is contained huge demand.Although electric pushrod has had more than 10 year from being introduced into production, but great majority are original bread formula, pistol type model in the market, because this kind of type product structure is by worm gear pair deceleration transmission, motor and drive rod angle in 90 °, volume takes up room greatly, and add and connect the factors such as complicated, degree of protection is on the low side, outward appearance unsightly, hinders the applicating and exploitation of a lot of application.In addition in stroke limit control, great majority adopt following control method at present: 1, current protection system; 2 sensory-control systems.These two kinds of control system have certain defect and complexity: Current Control protection system due to long-term overload operation, can make the long-term stall of motor damage or damage spare and accessory parts and motor, make life-span decline stability poor in Long-Time Service; It is better that transducer to control in nonmetal field effect, and in metal field, install effect bad, installs more complicated, easily occur error.Therefore, the shortcoming existed in prior art, is necessary to make improvement to prior art.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of structure simple, can the electric pushrod of accurate command displacement.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of electric pushrod, comprise hollow sleeve, the screw rod, the nut be connected with screw flight that be provided with motor in described hollow sleeve, are fixedly connected with motor and be sheathed on the driving tube be fixedly connected with on screw rod and with nut, this hollow sleeve inwall is provided with a switch mounting groove along its axial direction; A switch bar is installed with in this switch mounting groove; A limit switch is respectively equipped with before and after this switch bar; Described limit switch is triggered by the triggering block on nut.The present invention arranges a switch and installs groove on circular pipe type electric pushrod outer tube wall, and for the assembly that mounting limit switch and switch bar form, limit switch is installed on before and after switch bar respectively, and compresses triggering by triggering block on nut.The assembling of this covering device is simple and convenient, and push rod is accurately controlled at stroke limit position, and make journey error within the scope of ± 2mm, use safety, easily adjusts.Circular pipe type electric pushrod due to outward appearance magnificent attractive in appearance, manufacturability operation is more simple, can develop pocket, small-sized and heavy, the application in applicable various field.
Further, described switch bar is provided with multiple rectangular groove for mounting limit switch.The position of limit switch is regulated, to change the fore/aft travel of electric pushrod during convenient installation.
Further, this motor is fixedly connected with by an adapter sleeve with this screw rod.
Further, the rolling bearing be set on adapter sleeve is also comprised; The both sides, front and back of this rolling bearing are respectively equipped with shaft block ring.
Further, the positioning sleeve being set in screw front end is also comprised.Preventing screw rod from swinging when rotating, being out of shape.
Further, the inside, front end of described hollow sleeve is provided with fairlead; This fairlead and driving tube matched in clearance.This fairlead play the guiding role to driving tube.
Further, at least one sealing ring is provided with in the endoporus of this fairlead.Strengthen the sealing of electric pushrod.
Further, the axial direction along this hollow sleeve on described hollow sleeve inwall is interval with four grooves.The lead-in wire that this groove is used for electric pushrod inside passes through, and also can be used as the spline effect of nut or other parts simultaneously, nut can only be moved vertically.
Further, the tail end of described hollow sleeve is provided with afterbody erection column; The front end of described driving tube is provided with anterior erection column.
Accompanying drawing explanation
Fig. 1 is the structural representation of electric pushrod of the present invention
The complete structure schematic diagram that Fig. 2 is electric pushrod shown in Fig. 1
Fig. 3 is the sectional drawing of hollow sleeve shown in Fig. 1
Fig. 4 is the structural representation of the bar of switch shown in Fig. 1
Fig. 5 is the scheme of installation of switching device shown in Fig. 1
Fig. 6 is the circuit connection diagram of limit switch shown in Fig. 1
Referring to drawings and the specific embodiments, the invention will be further described.
Embodiment
Please refer to Fig. 1 and Fig. 2, wherein, Fig. 1 is the structural representation of electric pushrod of the present invention, the complete structure schematic diagram that Fig. 2 is electric pushrod shown in Fig. 1.A kind of electric pushrod of the present invention, comprises hollow sleeve 1 and the motor 2, screw rod 3, nut 4, driving tube 5 and the switching device 6 that are located in hollow sleeve 1.
Described hollow sleeve 1 tail end is provided with afterbody erection column 11, and the inside of front end is provided with fairlead 12; Sealing ring 121 is provided with in the endoporus of fairlead 12.Refer to Fig. 3, it is the sectional drawing of hollow sleeve shown in Fig. 1.Axial direction along this hollow sleeve 1 on this hollow sleeve 1 inwall is interval with four grooves 13, and is provided with a switch mounting groove 14.
Described motor 2 is positioned at the rear portion of hollow sleeve 1, and this motor 2 is electrically connected with DC power supply; Adopt planet-gear speed reducing motor in the present invention.
Described screw rod 3 rear end is fixedly connected with this motor 2 by an adapter sleeve 31, and front end is provided with a positioning sleeve 32.Described adapter sleeve is arranged with a rolling bearing 33, before and after this rolling bearing, is respectively equipped with shaft block ring.
Described nut 4 is threaded with this screw rod 3, and nut 4 can rotate with screw rod 3 and movable.
Described driving tube 5 to be set on screw rod 3 and to be fixedly connected with nut 4 front end, the outer ring of driving tube 5 and the front end endoporus matched in clearance of fairlead 12, and its front end is provided with anterior erection column 51; This driving tube 5 can move forward and backward with nut 4.
Please refer to Fig. 4 and Fig. 5, wherein Fig. 4 is the structural representation of the bar of switch shown in Fig. 1 61, and Fig. 5 is the scheme of installation of switching device 6 shown in Fig. 1.Described switching device 6 comprises switch bar 61 and front and back and is separately positioned on the first limit switch 62 and the second limit switch 63 on switch bar 61.This switch bar 61 is fixedly installed in the switch mounting groove 14 in hollow sleeve 1, and this switch bar 61 is provided with multiple rectangular groove 611.The pin of two limit switches is inserted in the rectangular groove 611 of switch bar.Two limit switches trigger by the triggering block on nut.
Refer to Fig. 6, it is the circuit connection diagram of limit switch shown in Fig. 1.Described first limit switch 62 and the second limit switch 63 diode in parallel respectively.
The operation principle of electric pushrod of the present invention is as follows: when power supply connects forward voltage, and screw rod 3 rotates and nut 4 is moved forward, thus drives driving tube 5 to move forward.Trigger the first limit switch 62 when nut 4 advances to its triggering block, circuit disconnects, and motor 2 shuts down, and the driving tube 5 be connected with nut 4 halts.When power supply connects reverse voltage, screw rod 3 moves after rotating and making nut 4, thus moves after driving driving tube 5, triggers the second limit switch 63 when nut 4 advances to its triggering block, and circuit disconnects, and motor 2 shuts down, and the driving tube 5 be connected with nut 4 stops retreating.So can reach the object of the fore/aft travel accurately controlling electric pushrod.
The present invention proposes a kind of circular pipe type electric pushrod, make driving tube and motor in alignment, taking up room is old-fashioned 30 ~ 40%, and weight saving 25 ~ 35%, outward appearance is more succinct magnificent attractive in appearance, better tightness (degree of protection is higher).Circular pipe type electric pushrod of the present invention proposes to adopt tube and pipe of aluminium alloy or round steel pipe as shell, and planet-gear speed reducing motor is built in pipe, and motor is directly connected with screw rod by adapter sleeve, and without complicated connecting factors, reliability is higher.Circular pipe type electric pushrod is under direct current driving power supply controls, and motor is rotated through epicyclic gearbox speed change and adapter sleeve drives screw rod to rotate, and driving tube advances or retreats under nut effect, and the effect object of making reaches desirable steady rectilinear motion effect.Because all parts are all sealed in pipe, fitted seal circle, degree of protection improves greatly, can reach IP65 ~ 68, all can use under various conditions.Circular pipe type electric pushrod outer tube wall arranges a switch and installs groove, for the assembly that mounting limit switch and switch bar form, limit switch is installed on before and after switch bar respectively, and compresses triggering by triggering block on nut.The assembling of this covering device is simple and convenient, and push rod is accurately controlled at stroke limit position, and make journey error within the scope of ± 2mm, use safety, easily adjusts.Circular pipe type electric pushrod due to outward appearance magnificent attractive in appearance, manufacturability operation is more simple, can develop pocket, small-sized and heavy, the application in applicable various field.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. an electric pushrod, comprise hollow sleeve, the screw rod, the nut be connected with screw flight that be provided with motor in described hollow sleeve, are fixedly connected with motor and be sheathed on the driving tube be fixedly connected with on screw rod and with nut, is characterized in that: this hollow sleeve inwall is provided with a switch mounting groove along its axial direction; A switch bar is installed with in this switch mounting groove; A limit switch is respectively equipped with before and after this switch bar; Described limit switch is triggered by the triggering block on nut.
2. a kind of electric pushrod according to claim 1, is characterized in that: described switch bar is provided with multiple rectangular groove for mounting limit switch.
3. a kind of electric pushrod according to claim 1, is characterized in that: this motor is fixedly connected with by an adapter sleeve with this screw rod.
4. a kind of electric pushrod according to claim 3, is characterized in that: also comprise the rolling bearing be set on adapter sleeve; The both sides, front and back of this rolling bearing are respectively equipped with shaft block ring.
5. a kind of electric pushrod according to claim 4, is characterized in that: also comprise the positioning sleeve being installed in screw front end.
6. a kind of electric pushrod according to claim 1, is characterized in that: the inside, front end of described hollow sleeve is provided with fairlead; This fairlead and driving tube matched in clearance.
7. a kind of electric pushrod according to claim 6, is characterized in that: be provided with at least one sealing ring in the endoporus of this fairlead.
8. a kind of electric pushrod according to claim 1, is characterized in that: described hollow sleeve inwall is interval with four grooves along the axial direction of this hollow sleeve.
9. a kind of electric pushrod according to claim 1, is characterized in that: the tail end of described hollow sleeve is provided with afterbody erection column; The front end of described driving tube is provided with anterior erection column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662306.9A CN104702042A (en) | 2013-12-09 | 2013-12-09 | Round tube type electric push rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662306.9A CN104702042A (en) | 2013-12-09 | 2013-12-09 | Round tube type electric push rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104702042A true CN104702042A (en) | 2015-06-10 |
Family
ID=53348896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310662306.9A Pending CN104702042A (en) | 2013-12-09 | 2013-12-09 | Round tube type electric push rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104702042A (en) |
Cited By (2)
| 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 |
| CN110679069A (en) * | 2018-10-17 | 2020-01-10 | 炼马机电（东莞）有限公司 | Driver |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006014117U1 (en) * | 2006-09-14 | 2008-02-14 | Dewert Antriebs- Und Systemtechnik Gmbh | Electromotive linear drive |
| CN201301944Y (en) * | 2008-10-31 | 2009-09-02 | 孔招全 | Hoisting device |
| CN203027072U (en) * | 2012-11-29 | 2013-06-26 | 台山市江口电器制造有限公司 | Electric push rod |
| CN203104198U (en) * | 2013-03-13 | 2013-07-31 | 浙江捷昌线性驱动科技股份有限公司 | Electric push rod |
| CN203151305U (en) * | 2013-03-12 | 2013-08-21 | 互赢集团控股有限公司 | Motor pushrod apparatus with adjustable stroke |
| CN103401351A (en) * | 2013-07-12 | 2013-11-20 | 开乐新能源科技有限公司 | Electronic push rod machine with internal limiting switch |
| CN203707977U (en) * | 2013-12-09 | 2014-07-09 | 台山市江口电器制造有限公司 | A circular pipe type electric push rod |
-
2013
- 2013-12-09 CN CN201310662306.9A patent/CN104702042A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006014117U1 (en) * | 2006-09-14 | 2008-02-14 | Dewert Antriebs- Und Systemtechnik Gmbh | Electromotive linear drive |
| CN201301944Y (en) * | 2008-10-31 | 2009-09-02 | 孔招全 | Hoisting device |
| CN203027072U (en) * | 2012-11-29 | 2013-06-26 | 台山市江口电器制造有限公司 | Electric push rod |
| CN203151305U (en) * | 2013-03-12 | 2013-08-21 | 互赢集团控股有限公司 | Motor pushrod apparatus with adjustable stroke |
| CN203104198U (en) * | 2013-03-13 | 2013-07-31 | 浙江捷昌线性驱动科技股份有限公司 | Electric push rod |
| CN103401351A (en) * | 2013-07-12 | 2013-11-20 | 开乐新能源科技有限公司 | Electronic push rod machine with internal limiting switch |
| CN203707977U (en) * | 2013-12-09 | 2014-07-09 | 台山市江口电器制造有限公司 | A circular pipe type electric push rod |
Cited By (3)
| 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 |
| CN110679069A (en) * | 2018-10-17 | 2020-01-10 | 炼马机电（东莞）有限公司 | Driver |
| CN110679069B (en) * | 2018-10-17 | 2021-07-27 | 炼马机电（东莞）有限公司 | Driver |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150610 |
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| RJ01 | Rejection of invention patent application after publication |