CN203967898U - Electric precise cylinder - Google Patents
Electric precise cylinder Download PDFInfo
- Publication number
- CN203967898U CN203967898U CN201420364243.9U CN201420364243U CN203967898U CN 203967898 U CN203967898 U CN 203967898U CN 201420364243 U CN201420364243 U CN 201420364243U CN 203967898 U CN203967898 U CN 203967898U
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- Prior art keywords
- lead screw
- screw shaft
- ball
- trunk
- piston bar
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- 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.)
- Expired - Lifetime
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- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000033001 locomotion Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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- Transmission Devices (AREA)
Abstract
A kind of electric precise cylinder, comprise: drive motors, cylinder barrel, the lead screw pair being formed by lead screw shaft and feed screw nut, thrust bearing, the trunk-piston bar of hollow and ball spline cover, wherein: lead screw shaft is arranged along the central axis of cylinder barrel, the power intake of lead screw shaft and the output shaft of drive motors are in transmission connection, lead screw shaft is by thrust bearing axial location, the outer ring of thrust bearing and cylinder barrel are coaxially fixing, feed screw nut is coaxially fixedly connected with trunk-piston bar, the other end of the relative power intake of lead screw shaft stretches in the trunk-piston bar of hollow, when drive motors drives lead screw shaft to rotate and then drives piston rod to move reciprocatingly, the rolling of ball has substituted original sliding friction between piston rod and support component and between guiding parts, thereby wearing and tearing have been reduced, improved efficiency, control precision and reliability.
Description
Technical field
The utility model relates to a kind of rotatablely moving and be converted to straight-line electric linear actuator, specifically a kind of piston rod obtains rolling support and the electric precise cylinder of the guiding of rolling simultaneously.
Background technology
Electric cylinder is to apply in recent years more and more general electric linear actuator, has energy-conservationly, and the plurality of advantages such as noise is little, pollution-free, and efficiency is high, and application layout is easy, has progressively substituted traditional hydraulic pressure and pneumatic wire actuator in a lot of applications.It is direct-connected that electric cylinder principle is that drive motors passes through, or driving belt and belt wheel, or gear pair drives lead screw shaft to rotate, and feed screw nut is fixedly connected with the trunk-piston bar of hollow, the rotation of lead screw shaft is converted into the rectilinear motion of feed screw nut and piston rod.For realizing above-mentioned rotatablely moving to straight-line conversion, must prevent the rotation of feed screw nut and piston rod, rotatablely moving of lead screw shaft could be changed into the straight reciprocating motion of feed screw nut and piston rod.The existing electric cylinder often groove by cylinder barrel inside, as the rotation that is slidably matched to prevent piston rod between gathering sill and piston rod projection, slide block or feather key, carrys out the reciprocating motion of sliding support piston rod by bush of bush bearing in cylinder barrel end.
Through the retrieval of prior art is found, Chinese patent literature CN201113645Y open (bulletin) day 2008.09.10, a kind of electric cylinder is disclosed, this electric cylinder has a gathering sill parallel with roller screw in housing 9, on push rod 6, be provided with one and coordinate directed projection 7 with this gathering sill, in this utility model, thereby be that guide effect is played in the rotation that the slip in the gathering sill on housing 9 realizes anti-throw-out lever by the projection 7 on push rod 6; Chinese patent literature CN203339872U open (bulletin) day 2013.12.11, a kind of servo electric jar of tape relay slide block is disclosed, slide block 4 outer walls of transferring in this utility model are provided with some slide blocks 41, corresponding each slide block 41, inboard wall of cylinder block is axially arranged with the identical chute that matches with it, slide block 41 endwisely slips in chute, thereby guide effect is played in the rotation of anti-throw-out lever.
Guide frame in above-mentioned technology all produces sliding friction, long-time use can produce wearing and tearing, thereby generation guiding clearance, cause the kinematic accuracy of system to reduce, heterodromous time, also have a backhaul gap, noise progressively becomes greatly, and intensity also can variation, and the dust that skimming wear produces can easily accelerate the wearing and tearing of inner leading screw again.
Chinese patent literature CN201466875U open (bulletin) day 2010.05.12, a kind of electromechanical actuator is disclosed, in this electromechanical actuator, start push rod 16 both sides adopt rolling bearing 19 and gathering sill as guiding mechanism, two rolling bearings 19 are distributed in the both sides of start push rod 16 afterbodys, bearing inner race is fixedly connected with start push rod 16, bearing outer ring rolls along gathering sill in cylinder body, prevents the rotation of start push rod 16; This electromechanical actuator also comprises an axle sleeve 17, is arranged between start push rod 16 and end cap 22, when push rod is done stretching motion, push rod is played to sliding support effect.Although the prior art adopts rolling bearing as the guide frame of start push rod, substituted the guidance mode of feather key and keyway, in this link, by rolling, substituted slip, but adopt axle sleeve to support push rod at push rod output, in the linear extendible reciprocating motion of push rod, this link remains sliding friction, especially actuator in actual use push rod often can bear certain radial load, now at the effect Lower shaft sleeve of radial load and the friction meeting between push rod, sharply rise, wearing and tearing aggravation, the inner unsettled frictional force of actuator can make the position of push rod end simultaneously, it is very difficult that the accurate control of speed and power becomes.To sum up, all drawbacks because the sliding friction of the support component of existing electric cylinder guiding parts or piston rod output causes, have limited electric cylinder and have required the application high and occasion that life requirement is high in a lot of control precisions.
Utility model content
The utility model is for prior art above shortcomings, a kind of electric precise cylinder is proposed, piston rod in this electric precise cylinder obtains roll guiding and rolling support simultaneously, not only eliminated the sliding friction between electric cylinder internal guide elements, also eliminated the sliding friction between piston rod and end support parts, reduce wearing and tearing, extended useful life, more improved control precision.
The utility model is achieved through the following technical solutions: the utility model comprises: drive motors, cylinder barrel, the lead screw pair being formed by lead screw shaft and feed screw nut, thrust bearing, the trunk-piston bar of hollow and ball spline cover, wherein: lead screw shaft is arranged along the central axis of cylinder barrel, the power intake of lead screw shaft and the output shaft of drive motors are in transmission connection, lead screw shaft is by thrust bearing axial location, the outer ring of thrust bearing and cylinder barrel are coaxially fixing, feed screw nut is coaxially fixedly connected with trunk-piston bar, the other end of the relative power intake of lead screw shaft stretches in the trunk-piston bar of hollow.
Described ball spline cover is fixed on cylinder barrel end, ball spline cover inside includes some the symmetrical closed raceways that can make ball-recirculation roll, in closed raceway, be covered with ball, the corresponding external peripheral surface at trunk-piston bar is also distributed with the raceway rolling for ball of similar number vertically in whole length, with the trunk-piston bar of raceway and the ball of ball spline cover and inside thereof, form ball spline pair, trunk-piston bar is supported by spline housing by ball and utilizes the relative spline housing of rolling of ball to do linear reciprocal movement.Because spline housing is completely fixed in cylinder barrel end and cylinder barrel, the attribute of ball spline is restricted the rotation of trunk-piston bar, ball spline cover plays rolling support and rolling guide effect by ball to trunk-piston bar simultaneously like this, when drive motors drives lead screw shaft rotation, the feed screw nut being fixed together, nut seat and trunk-piston bar can only be done linear reciprocal movement vertically.
Described thrust bearing is comprised of a pair of angular contact thrust bearing or taper roll bearing.
Described lead screw shaft and feed screw nut thereof are ball screw assembly, or roller screw pair.
Described drive motors is connected by Linear transmission or refraction-reflection type transmission with screw mechanism.
Described Linear transmission refers to: the output shaft of drive motors is connected with lead screw shaft by shaft coupling; Described refraction-reflection type transmission refers to: drive motors rotates by belt wheel belt or the moving lead screw shaft of meshing gear subband.
Described drive motors adopts but is not limited to servomotor, stepping motor, direct current machine or alternating current machine.
The raceway of described ball spline pair is symmetrical arranged, and is at least two groups.
The two ends of described ball spline cover are provided with sealing ring, at ball spline cover middle part, are provided with fatten groove and the oilhole communicating with closed raceway.
The end of described trunk-piston bar is provided with the adapter being connected for the connecting object with different.
Technique effect
Compared with prior art, the utlity model has following beneficial effect: provide a kind of electric precise cylinder with ball spline pair, ball spline cover plays to piston rod roll guiding and rolling support effect by ball simultaneously, so just the sliding friction between guiding parts or between piston rod and end portion supports parts in prior art has all been become to rolling friction, made the running of system become very smooth and easy.Eliminate skimming wear, extended useful life, reduced system noise, improved drive system efficiency, thereby improved the Position Control of system, the precision that speed is controlled and power is controlled, and then expanded the scope of application of electric cylinder.Even in the situation that push rod bears certain radial load, the service behaviour of electric cylinder also can be very stable.
Accompanying drawing explanation
Fig. 1 is the assembling schematic diagram of the utility model electric cylinder;
In figure, omit drive motors.
Fig. 2 is the perspective view of the pair of ball spline described in the utility model;
Fig. 3 is drive motors and screw mechanism Linear transmission connection diagram;
Fig. 4 is drive motors and the screw mechanism refraction-reflection type schematic diagram that is in transmission connection;
In figure: 1 is that lead screw shaft, 2 is that guide screw lock jack panel, 3 is that bearing plate, 4 bearing pedestals, 5 are that thrust bearing, 6 is that cylinder barrel, 7 is that feed screw nut, 8 is that nut seat, 9 is that ball, 10 is that fuel filler neck, 11 is that ball spline cover, 12 is that sealing ring, 13 is that trunk-piston bar, 14 is that adapter locking nut, 15 is that adapter, 16 is that drive motors, 17 is that shaft coupling, 18 is that fixed head, 19 is that small pulley, 20 is that belt, 21 is large belt wheel.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented take technical solutions of the utility model under prerequisite; provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, the present embodiment comprises: cylinder barrel 6, the lead screw pair that lead screw shaft 1 and feed screw nut 7 form, thrust bearing 5 and bearing pedestal 4, trunk-piston bar 13, wherein: lead screw shaft 1 is arranged along the central axis of cylinder barrel 6, lead screw shaft 1 is through thrust bearing 5, by the shaft shoulder and locking nut 2, fix with the inner ring of thrust bearing, the outer ring of thrust bearing 5 coordinates with bearing pedestal 4 endoporus, fixing with bearing pedestal 4 by bearing plate 3, so just lead screw shaft 1 has been carried out to axial location, thrust bearing 5 is comprised of a pair of thrust bearing, can be that a pair of angular contact thrust bearing can be also a pair of taper roll bearing, cylinder barrel 6 is fixedly connected with bearing pedestal 4, connection way can be both also can be in cylinder barrel 6 and bearing pedestal 4 matching part cutted threads by bolt, feed screw nut 7 is bolted to connection with nut seat 8, nut seat 8 is fixedly connected with by threaded engagement with trunk-piston bar 13, feed screw nut 7 is fixed together by nut seat 8 and trunk-piston bar 13 like this, the end of lead screw shaft 1 stretches in the trunk-piston bar 13 of hollow.This electric precise cylinder also comprises ball spline cover 11, and ball spline cover 11 is fixed on cylinder barrel 6 ends.
As shown in Figure 2, ball spline overlaps 11 inside the closed raceway that can make ball-recirculation roll, in closed raceway, be covered with ball 9, the external peripheral surface of trunk-piston bar 13 is distributed with the raceway rolling for ball in whole length vertically, with the trunk-piston bar 13 of raceway and the ball 9 of ball spline cover 11 and inside thereof, form ball splines pair, trunk-piston bar 13 is supported by spline housing 11 by ball 9 and utilizes the relative spline housing of rolling of ball to do linear reciprocal movement.In figure, six groups of symmetrical raceways of the secondary employing of the ball spline of embodiment, have six symmetrical raceways on the outer circumference surface of trunk-piston bar 13, in ball spline cover 11, also have six corresponding closed raceways of symmetry.Raceway number can have different designs, but at least will have two groups of symmetrical raceways.At ball spline, overlapping 11 middle parts has fatten groove and oilhole to communicate with closed raceway, and the correspondence position on cylinder barrel has oilhole, and fuel filler neck 10 is housed on oilhole, can give ball spline the secondary lubricating grease that adds by fuel filler neck 10; For preventing that dust and pollutant from entering ball spline pair and preventing that in closed raceway, grease is excessive, is equipped with sealing ring 12 at the two ends of ball spline cover 11.
As shown in Figure 1, ball spline cover 11 is completely fixed in cylinder barrel 6 ends and cylinder barrel 6, the attribute of ball spline is restricted the rotation of trunk-piston bar 13, so 11 pairs of trunk-piston bars 13 of ball spline cover play rolling support and rolling guide effect simultaneously, when drive motors 16 drives lead screw shaft 1 rotation, the feed screw nut 7 being fixed together, nut seat 8 and trunk-piston bar 13 can only be done linear reciprocal movement vertically.
What in Fig. 1 embodiment, adopt is ball screw assembly,, also can replace to roller screw pair, to meet the use occasion of very big thrust.
As shown in Figure 3, described drive motors 16 can arrange by coaxial line with lead screw shaft 1, and the power intake of lead screw shaft 1 and drive motors 16 output shafts are in transmission connection by shaft coupling 17.
As shown in Figure 4, described drive motors 16 can also be arranged by refraction-reflection type with lead screw shaft 1, comprise: the small pulley 19 on the fixed head 18 being fixedly connected with cylinder barrel 6 with drive motors 16 respectively, the output shaft that is fixedly installed on drive motors 16, be fixedly installed on the large belt wheel 21 of the power intake of lead screw shaft 1, and being arranged between two belt wheels the belt 20 for transferring power, drive motors 16 rotates by belt wheel and belt drives lead screw shaft 1.Under this refraction-reflection type arrangement, belt wheel belt can also be replaced with to the gear pair of pair of meshing, drive motors 16 drives to lead screw shaft 1 rotation by the engagement of gear.
For meeting the connection requirement of trunk-piston bar 13 outputs and different target, as shown in Figure 1, at trunk-piston bar 13 ends, adapter 15 is housed, trunk-piston bar 13 is threaded connection with adapter 15, and fastening through locking nut 14.According to the multiple different adapter 15 of actual and outside connection design, in the face of needing only, different connecting objects changes adapter 15.
Drive motors 16, according to the different application occasion of electric cylinder, can be selected dissimilar motor, to controlling the high occasion of quality requirements, preferentially selects servomotor, and general occasion can be selected stepping motor, common DC motor, alternating current machine etc.
Claims (10)
1. an electric precise cylinder, it is characterized in that, comprise: the trunk-piston bar of drive motors, cylinder barrel, the lead screw pair being formed by lead screw shaft and feed screw nut, thrust bearing, hollow and ball spline cover, wherein: lead screw shaft is arranged along the central axis of cylinder barrel, the power intake of lead screw shaft and the output shaft of drive motors are in transmission connection, lead screw shaft is by thrust bearing axial location, the outer ring of thrust bearing and cylinder barrel are coaxially fixing, feed screw nut is coaxially fixedly connected with trunk-piston bar, and the other end of the relative power intake of lead screw shaft stretches in the trunk-piston bar of hollow.
2. electric precise cylinder according to claim 1, it is characterized in that, described ball spline cover is fixed on cylinder barrel end, ball spline cover is inner is arranged with some for the closed raceways of ball-recirculation rolling, in closed raceway, be covered with ball, the corresponding raceway of similar number that is provided with on the external peripheral surface of trunk-piston bar, with the trunk-piston bar of raceway and the ball of ball spline cover and inside thereof, form ball spline pair, trunk-piston bar is supported by spline housing by ball and utilizes the relative spline housing of rolling of ball to do linear reciprocal movement.
3. electric precise cylinder according to claim 1, is characterized in that, described thrust bearing is comprised of a pair of angular contact thrust bearing or taper roll bearing.
4. electric precise cylinder according to claim 1, is characterized in that, described lead screw shaft and feed screw nut thereof are ball screw assembly, or roller screw pair.
5. electric precise cylinder according to claim 1, is characterized in that, described drive motors is connected by Linear transmission or refraction-reflection type transmission with screw mechanism.
6. electric precise cylinder according to claim 5, is characterized in that, described Linear transmission refers to: the output shaft of drive motors is connected with lead screw shaft by shaft coupling; Described refraction-reflection type transmission refers to: drive motors rotates by belt wheel belt or the moving lead screw shaft of meshing gear subband.
7. according to the electric precise cylinder described in claim 1 or 5 or 6, it is characterized in that, described drive motors adopts servomotor, stepping motor, direct current machine or alternating current machine.
8. electric precise cylinder according to claim 2, is characterized in that, the raceway of described ball spline pair is symmetrical arranged, and is at least two groups.
9. electric precise cylinder according to claim 1 and 2, is characterized in that, the two ends of described ball spline cover are provided with sealing ring, at ball spline cover middle part, is provided with fatten groove and the oilhole communicating with closed raceway.
10. electric precise cylinder according to claim 2, is characterized in that, the end of described trunk-piston bar is provided with the adapter being connected for the connecting object with different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420364243.9U CN203967898U (en) | 2014-07-02 | 2014-07-02 | Electric precise cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420364243.9U CN203967898U (en) | 2014-07-02 | 2014-07-02 | Electric precise cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203967898U true CN203967898U (en) | 2014-11-26 |
Family
ID=51928442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420364243.9U Expired - Lifetime CN203967898U (en) | 2014-07-02 | 2014-07-02 | Electric precise cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203967898U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052188A (en) * | 2014-07-02 | 2014-09-17 | 上海翱锐控制系统有限公司 | Precise electric cylinder |
| CN107314091A (en) * | 2017-07-26 | 2017-11-03 | 哈尔滨工业大学 | A kind of electronic 6-dof motion platform based on planetary roller screw |
| CN107915037A (en) * | 2017-11-11 | 2018-04-17 | 成都市龙泉星源机械厂 | A kind of high synchronism electromechanical coupling system with trailing type thermal insulation tile |
| IT201700079738A1 (en) * | 2017-07-14 | 2019-01-14 | Topp S R L | SHIELDING APPARATUS WITH ADJUSTABLE FLAPS |
| CN110925374A (en) * | 2019-12-04 | 2020-03-27 | 广州亨龙智能装备股份有限公司 | Electric cylinder and power equipment |
| WO2022062325A1 (en) * | 2020-09-22 | 2022-03-31 | 北京京东乾石科技有限公司 | Ball spline device, automated guided vehicle, and stereoscopic warehouse system |
| CN117856523A (en) * | 2024-03-07 | 2024-04-09 | 吉林大学 | Compact integrated telescopic rotary electric cylinder |
-
2014
- 2014-07-02 CN CN201420364243.9U patent/CN203967898U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052188A (en) * | 2014-07-02 | 2014-09-17 | 上海翱锐控制系统有限公司 | Precise electric cylinder |
| IT201700079738A1 (en) * | 2017-07-14 | 2019-01-14 | Topp S R L | SHIELDING APPARATUS WITH ADJUSTABLE FLAPS |
| EP3429065A1 (en) * | 2017-07-14 | 2019-01-16 | Topp Srl a socio unico | Screening device with adjustable slats |
| CN107314091A (en) * | 2017-07-26 | 2017-11-03 | 哈尔滨工业大学 | A kind of electronic 6-dof motion platform based on planetary roller screw |
| CN107915037A (en) * | 2017-11-11 | 2018-04-17 | 成都市龙泉星源机械厂 | A kind of high synchronism electromechanical coupling system with trailing type thermal insulation tile |
| CN110925374A (en) * | 2019-12-04 | 2020-03-27 | 广州亨龙智能装备股份有限公司 | Electric cylinder and power equipment |
| WO2022062325A1 (en) * | 2020-09-22 | 2022-03-31 | 北京京东乾石科技有限公司 | Ball spline device, automated guided vehicle, and stereoscopic warehouse system |
| CN117856523A (en) * | 2024-03-07 | 2024-04-09 | 吉林大学 | Compact integrated telescopic rotary electric cylinder |
| CN117856523B (en) * | 2024-03-07 | 2024-05-07 | 吉林大学 | Compact integrated telescopic rotary electric cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |