CN201386711Y - Flexible feedback digital liquid cylinder - Google Patents
Flexible feedback digital liquid cylinder Download PDFInfo
- Publication number
- CN201386711Y CN201386711Y CN200920127023U CN200920127023U CN201386711Y CN 201386711 Y CN201386711 Y CN 201386711Y CN 200920127023 U CN200920127023 U CN 200920127023U CN 200920127023 U CN200920127023 U CN 200920127023U CN 201386711 Y CN201386711 Y CN 201386711Y
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- China
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- valve body
- piston rod
- nut
- stepper motor
- coiling
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- Expired - Fee Related
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Abstract
The utility model relates to a flexible feedback digital liquid cylinder, wherein two ends of a valve body are respectively provided with a passive step motor and an active step motor, wherein an output shaft of the passive drive motor is connected with one end of a valve core with a screw thread, the other end of the valve core with the screw thread is connected with an output shaft of the active step motor through a coupling, a cylinder body is arranged beside the valve body, a piston rod is installed in the cylinder body, the piston rod is fixed with one end of an armored rope, the other end of the armored rope is sleeved on an outer screw thread of a coiling nut, the coiling nut is sleeved on a fixed screw, the coiling nut is provided with a driving gear, the driving gear is meshed with a driven gear on a gear shaft, a coil spring box and a sensor are installed on the gear shaft, and the sensor sends a feedback control signal to the passive step motor. The flexible feedback digital liquid cylinder has reduced volume and increased rigidity without manufacturing the piston rod to be hollow, the cylinder body can directly adopt a common oil cylinder or a cylinder, and has variable pulse amount, more convenient use, simple structure and low cost.
Description
Technical field
The utility model belongs to fluid operating system field, specifically, relates in particular to a kind of flexible feedback digital fluid cylinder.
Background technique
Digital fluid cylinder is used for driving the location, has obtained using widely and developing in industrial field, compares with servo-cylinder or proportional cylinder commonly used at present, advantage such as have precision height, good stability, contamination resistance is strong, temperature drift is few.Chinese patent ZL 200410069392.3 has announced a kind of two-stage screw internal foodback digital fluid cylinder on October 10th, 2007, comprises formations such as cylinder body, hollow piston rod, feedback cover, finger, the accurate flute profile screw rod of big helical pitch, connecting pin, fastening piece, thrust-bearing, gland, nut sleeve, threaded spool, feather key, sliding sleeve, stepper motor, joint bolt, support, external oil pipe, logical ante-chamber oil circuit, return opening, logical back cavity oil circuit, filler opening, little backing pin.Stepper motor receives digital pulse signal and rotates control valve port connection fluid cylinder when driving the Thread valve core, piston rod moves under the promotion of hydraulic oil, in movement process, stir the accurate flute profile screw rod of the big helical pitch of the first order, drive second level nut sleeve again and feed back on the control spool by the finger on the hollow piston rod, because the amplification of the accurate flute profile screw rod of the big helical pitch of the first order, under the not high situation of stepper motor rotating speed, the high-speed motion and the position tracking of oil cylinder have been realized.The major defect of above structure is as follows:
1, needs piston rod is made hollow, reduced the rigidity of piston rod.
2, oil cylinder can not be only according to load and stroke design, and its volume is subjected to putting into the restriction of flute profile screw rod size.
3, piston rod as producing minor rotation, can have a strong impact on the positioning error of oil cylinder under load.
4, owing to adopt the rigidity feedback, in a single day its pulse equivalency is just decided and can not be become again when design, and this brings very big inconvenience on giving and using, and the speed limit of its rapid movement is subjected to the restriction of stepper motor maximum (top) speed.
5, its processing difficulties of the accurate flute profile screw rod of big helical pitch, the manufacturing cycle is long, accounts for most of cost of whole digital fluid cylinder.
6, can not directly adopt existing standard flow cylinder on the market, maintenance, use difficulty.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of flexible feedback digital fluid cylinder simple in structure, easy to use.
The technical solution of the utility model is as follows: a kind of flexible feedback digital fluid cylinder, comprise valve body, active stepper motor, threaded spool and piston rod, on valve body, offer filler opening, first return opening, second return opening, first oil outlet and second oil outlet, described threaded spool is arranged in the valve body, this threaded spool has been provided with the boss of oil circuit sealing and switching effect, and its key is:
A, passive stepper motor and stepper motor initiatively are installed respectively in described two ends of valve body, wherein the output shaft of passive stepper motor is connected with an end of threaded spool, the other end of threaded spool is a screw-rod structure, this screw rod stretches into from an end of coupling, both screw-thread fit, the other end of coupling is fixedlyed connected with the output shaft of active stepper motor;
B, cylinder body is set on the next door of described valve body, piston rod is installed in the active chamber of this cylinder body, the bar portion of piston rod stretches out outside the cylinder body forward, the dish portion of piston rod is separated into former and later two chambers with active chamber, wherein front chamber is communicated with second oil outlet of valve body by the ante-chamber oil pipe, and rear chamber communicates with first oil outlet of valve body by the back cavity oil pipe;
The dish portion of C, described piston rod and an end of wire rope are fixed, the other end of wire rope is on the outside thread that is enclosed within the coiling nut, described coiling nut sleeve is loaded on the standing screw, both screw-thread fit, and the coiling nut is provided with driving gear, the driven gear engagement on this driving gear and the gear shaft, described gear shaft can rotate relative to cylinder body, coil spring box and sensor are installed on gear shaft, wherein are provided with wind spring in the coil spring box, described sensor is to passive stepper motor feedback control signal.
In the utility model, the active stepper motor receives digital pulse signal drive coupling and rotates forward or backwards, threaded spool is moved relative to valve body, switch oil circuit, high-pressure liquid enters the back cavity oil pipe or enters the ante-chamber oil pipe by filler opening, this moment first return opening or second return opening oil return, high-pressure liquid promotes piston rod and moves, piston rod pulling simultaneously or loosen the wire rope that is attached thereto, the wiring nut is rotated, and the driving gear on the coiling nut rotates by the driven gear driven gear axle that is engaged with.At this moment, the wind spring accumulation of energy on the gear shaft in the coil spring box or release energy remains the wire rope tension; Simultaneously, the sensor that links to each other with gear shaft converts the angle value that gear shaft turns over to control signal corresponding, feed back to passive stepper motor, make the output shaft of passive stepper motor drive threaded valve core rotation and oppositely mobile, the control valve port is closed or is had the trend of closing, thereby realizes the digital control of fluid cylinder and location.
The utility model is owing to adopt wire rope and sensor to feed back as flexibility, mode by master-passive step motor control, thereby need not piston rod is made hollow, can reduced volume, improve rigidity, cylinder body can directly adopt common oil cylinder or cylinder, and has the variable pulse equivalent, uses more convenient, simple in structure, cost is lower.
For the ease of processing and assembling, above-mentioned valve body is the straight-through tube structure, and an end face of this valve body fixes by bolt and passive stepper motor, and the other end of valve body is fixed by bolt and active stepper motor.
In order to make more compact structure, and make things convenient for inner body to install, above-mentioned cylinder body is made of active chamber and holding cavity, the open-mouth end of described active chamber docks fixing with the open-mouth end of holding cavity, coiling nut, driving gear and driven gear are set in holding cavity, wire rope around cover on the coiling nut is introduced in the active chamber, and fixes with piston rod.
Above-mentioned coiling nut and driving gear are structure as a whole, and to make things convenient for moulding, ensure intensity.
Firm in order to guarantee the standing screw installation, the axis of said fixing screw rod and cylinder body is perpendicular, and the two end supports of this standing screw is on the wall of holding cavity opposite side.
Gear shaft assembling for convenience, and guarantee that gear shaft goes slick, reliably, the said gear axle parallels with standing screw, and this gear shaft is bearing on the wall of holding cavity opposite side by bearing.
For simplified structure, further reduced volume, an end of said gear axle stretches out outside the cylinder body, and extension suit coil spring box and sensor successively.
The beneficial effects of the utility model are:
1, need not piston rod is made hollow, can dwindle piston rod volume, improve rigidity.
2, cylinder body can directly adopt existing standard flow cylinder on the market, maintenance, easy to use.
3, piston rod as producing minor rotation, can not influence the positioning error of fluid cylinder, good reliability under load.
4, owing to adopt wire rope and sensor to feed back, control by master-passive stepper motor as flexibility, easy to use, good stability.
5, each modular construction is simple, and processing and assembling are easy, and overall volume is little, and cost is low.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, valve body 16 is the straight-through tube structure, and by the passive stepper motor 11 of bolt, the other end of valve body 16 is by bolt stepper motor 17 initiatively at an end face of valve body 16.Wherein offer first oil outlet 21 and second oil outlet 22 on one side the wall at valve body 16, offer filler opening 19, first return opening 18 and second return opening 20 on the wall of valve body 16 another sides, filler opening 19 is between first return opening 18 and second return opening 20.Threaded spool 12 is installed in the valve body 16, and this threaded spool 12 is provided with two boss that play the oil circuit seal action, has two boss that play the switching effect between two seal bosses.The output shaft of described passive stepper motor 11 stretches in the hole of threaded spool 12 1 ends, the other end of threaded spool 12 is a screw-rod structure, this screw rod stretches into from an end of coupling 15, both screw-thread fit, and the other end of coupling 15 is fixedlyed connected with the output shaft of active stepper motor 17.
As can be known from Fig. 1, on the next door of valve body 16 cylinder body 8 is set, this cylinder body 8 is made of active chamber and holding cavity, and the open-mouth end of described active chamber and the open-mouth end of holding cavity connect, and fixes by screw thread or bolt or other mode that is equal to.Piston rod 7 is installed in the cylinder body active chamber, the bar portion of piston rod 7 stretches out forward outside the cylinder body 8, the dish portion of piston rod 7 is separated into former and later two chambers with active chamber, front chamber is communicated with second oil outlet 22 of valve body 16 by ante-chamber oil pipe 14, and rear chamber communicates with first oil outlet 21 of valve body 16 by back cavity oil pipe 13.The outward appearance of described holding cavity can be square or other shape, coiling nut 5, driving gear 23 and driven gear 24 are set in holding cavity, coiling nut 5 and driving gear 23 are structure as a whole, be set on the standing screw 4, and with standing screw 4 screw-thread fit, the pitch of standing screw 4 equates that with the externally threaded pitch of coiling nut 5 this standing screw 4 is perpendicular with the axis of cylinder body 8, and the two end supports of standing screw 4 is on the wall of holding cavity opposite side.Around cover wire rope 6, wire rope 6 is introduced in the active chamber, and fixes with the central authorities of piston rod 7 dish portions on the outside thread of described coiling nut 5.
Further as can be known, driving gear 23 and the driven gear on the gear shaft 9 24 on the coiling nut 5 mesh from Fig. 1, and gear shaft 9 parallels with standing screw 4, and this gear shaft 9 is bearing on the wall of holding cavity opposite side by bearing 3,10.One end of described gear shaft 9 stretches out outside the holding cavity, and extension suit coil spring box 2 and sensor 1 successively, wherein in the coil spring box 2 wind spring 2a is housed, and described sensor 1 is to passive stepper motor 11 feedback control signals.
The utility model is work like this:
The fluid that adopts in the utility model can be gas or liquid, and wire rope also can be other flexible rope; It is the closed loop control form that other motor and sensor constitute that the stepper motor that the utility model adopts also can be changed to.The utility model is a kind of flexible feedback digital fluid cylinder, does not need piston rod is made hollow, can directly adopt common oil cylinder or cylinder, and have the variable pulse equivalent, uses more conveniently, and cost is lower.Its upper sensor 1, coil spring box 2, standing screw 4, band gear wiring nut 5, wire rope 6, gear shaft 9, bearing 3,10 and part cylinder body can be formed as a kind of high accuracy displacement sensor and use separately; Passive stepper motor 11 on it, threaded spool 12, back cavity oil pipe 13, ante-chamber oil pipe 14, shaft joint 15, valve body 16, initiatively stepper motor 17, first return opening 18, filler opening 19, second return opening 20 also can be formed as a kind of digital valve and use separately.
Claims (7)
1, a kind of flexible feedback digital fluid cylinder, comprise valve body (16), active stepper motor (17), threaded spool (12) and piston rod (7), on valve body (16), offer filler opening (19), first return opening (18), second return opening (20), first oil outlet (21) and second oil outlet (22), described threaded spool (12) is arranged in the valve body (16), this threaded spool (12) has been provided with the boss of oil circuit sealing and switching effect, it is characterized in that:
A, passive stepper motor (11) and stepper motor (17) initiatively are installed respectively at the two ends of described valve body (16), the output shaft of wherein passive stepper motor (11) is connected with an end of threaded spool (12), the other end of threaded spool (12) is a screw-rod structure, this screw rod stretches into from an end of coupling (15), both screw-thread fit, the other end of coupling (15) is fixedlyed connected with the output shaft of active stepper motor (17);
B, cylinder body (8) is set on the next door of described valve body (16), piston rod (7) is installed in the active chamber of this cylinder body (8), the bar portion of piston rod (7) stretches out forward outside the cylinder body (8), the dish portion of piston rod (7) is separated into former and later two chambers with active chamber, wherein front chamber is communicated with second oil outlet (22) of valve body (16) by ante-chamber oil pipe (14), and rear chamber communicates with first oil outlet (21) of valve body (16) by back cavity oil pipe (13);
C, one end of the dish portion of described piston rod (7) and wire rope (6) is fixed, the other end of wire rope (6) is on the outside thread that is enclosed within coiling nut (5), described coiling nut (5) is set on the standing screw (4), both screw-thread fit, and coiling nut (5) is provided with driving gear (23), driven gear (24) engagement on this driving gear (23) and the gear shaft (9), described gear shaft (9) can rotate relative to cylinder body (8), coil spring box (2) and sensor (1) are installed on gear shaft (9), wherein be provided with wind spring (2a) in the coil spring box (2), described sensor (1) is to passive stepper motor (11) feedback control signal.
2, a kind of flexible feedback digital fluid cylinder according to claim 1, it is characterized in that: described valve body (16) is the straight-through tube structure, one end face of this valve body (16) fixes by bolt and passive stepper motor (11), and the other end of valve body (16) is fixing by bolt and active stepper motor (17).
3, a kind of flexible feedback digital fluid cylinder according to claim 1, it is characterized in that: described cylinder body (8) is made of active chamber and holding cavity, the open-mouth end of described active chamber docks fixing with the open-mouth end of holding cavity, coiling nut (5), driving gear (23) and driven gear (24) are set in holding cavity, coiling nut (5) is gone up around the wire rope (6) of cover and is introduced in the active chamber, and fixing with piston rod (7).
4, according to claim 1 or 3 described a kind of flexible feedback digital fluid cylinders, it is characterized in that: described coiling nut (5) and driving gear (23) are structure as a whole.
5, a kind of flexible feedback digital fluid cylinder according to claim 3 is characterized in that: described standing screw (4) is perpendicular with the axis of cylinder body (8), and the two end supports of this standing screw (4) is on the wall of holding cavity opposite side.
6, a kind of flexible feedback digital fluid cylinder according to claim 5, it is characterized in that: described gear shaft (9) parallels with standing screw (4), and this gear shaft (9) is bearing on the wall of holding cavity opposite side by bearing (3,10).
7, according to claim 1 or 6 described a kind of flexible feedback digital fluid cylinders, it is characterized in that: an end of described gear shaft (9) stretches out outside the cylinder body (8), and extension suit coil spring box (2) and sensor (1) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920127023U CN201386711Y (en) | 2009-04-15 | 2009-04-15 | Flexible feedback digital liquid cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920127023U CN201386711Y (en) | 2009-04-15 | 2009-04-15 | Flexible feedback digital liquid cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201386711Y true CN201386711Y (en) | 2010-01-20 |
Family
ID=41579245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920127023U Expired - Fee Related CN201386711Y (en) | 2009-04-15 | 2009-04-15 | Flexible feedback digital liquid cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201386711Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102902279A (en) * | 2012-09-20 | 2013-01-30 | 珠海灵科自动化科技有限公司 | Precision fine adjustment mechanism for stroke |
| CN106930999A (en) * | 2017-03-17 | 2017-07-07 | 枣庄市达源液压设备有限公司 | A kind of Simple hydraulic cylinder |
| CN107917117A (en) * | 2016-10-11 | 2018-04-17 | 张利 | A kind of mechanical hydraulic servo cylinder |
-
2009
- 2009-04-15 CN CN200920127023U patent/CN201386711Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102902279A (en) * | 2012-09-20 | 2013-01-30 | 珠海灵科自动化科技有限公司 | Precision fine adjustment mechanism for stroke |
| CN102902279B (en) * | 2012-09-20 | 2016-04-13 | 珠海灵科自动化科技有限公司 | Precision fine adjustment mechanism for stroke |
| CN107917117A (en) * | 2016-10-11 | 2018-04-17 | 张利 | A kind of mechanical hydraulic servo cylinder |
| CN106930999A (en) * | 2017-03-17 | 2017-07-07 | 枣庄市达源液压设备有限公司 | A kind of Simple hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20120415 |