CN201305425Y - Screw rod follow-up supporting mechanism of hoisting device - Google Patents
Screw rod follow-up supporting mechanism of hoisting device Download PDFInfo
- Publication number
- CN201305425Y CN201305425Y CNU2008202168609U CN200820216860U CN201305425Y CN 201305425 Y CN201305425 Y CN 201305425Y CN U2008202168609 U CNU2008202168609 U CN U2008202168609U CN 200820216860 U CN200820216860 U CN 200820216860U CN 201305425 Y CN201305425 Y CN 201305425Y
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- screw rod
- bearing
- base
- supporting mechanism
- gear
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Abstract
The utility model relates to a safety mechanism of an oil cylinder or other mightness hoisting device, in particular to a screw-rod follow-up supporting mechanism of a jacking oil cylinder hoisting device, which is characterized in that a base is provided with an overloading screw rod, and a bearing round nut is installed on the overloading screw rod, and a bearing is arranged between the bearing round nut and the base, and a spring is arranged below the bearing, and an output shaft of a servo motor is connected with the bearing round nut, and the outer side of the bearing round nut is made into a gear, and a micrometer is mounted on the base, and the micrometer is connected with an electronic amplifier through a conducting wire. The output shaft of the servo motor is provided with a gear which is engaged with the gear on the outer side of the bearing round nut. A gap is arranged between the bearing round nut and the base. The screw-rod follow-up supporting mechanism has simple, compact and reasonable structure, and can effectively support the overloading work piece when the oil pressure of the oil cylinder disappears; the follow-up supporting screw rod can be self-locked to be maintained, thereby preventing the falling of the overloading, thereby ensuring the jacking safety of the overloading work piece.
Description
Technical field
The utility model relates to the safety gear of a kind of oil cylinder or other powerful hoisting device, especially the screw follow-up supporting mechanism of jacking cylinder hoisting device.
Background technology
Using oil pressure jacking cylinder (hydraulic jack) jacking weight is construction method common in the engineering, the above heavy load workpiece condition of construction of hundreds of ton especially, and the oil pressure jacking is unique feasible selection.Because there are unsafe unexpected factors such as leakage of oil, booster in hydraulic actuating cylinder, and the safety of heavily loaded jacking is restricted.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thereby provide a kind of screw rod follow-up supporting mechanism of hoisting device, the screw rod of follow-up supporting mechanism props up heavy load workpiece and synchronous with the lifting process of oil cylinder gently, follow oil cylinder and heavily loaded moving in real time, still can effectively support heavy load workpiece in case the oil pressure of oil cylinder breaks down suddenly when disappearing, avoid the workpiece landing.
The technical scheme that provides according to the utility model, the screw rod follow-up supporting mechanism of hoisting device comprises bearing, feature is: heavily loaded screw rod is installed on base, the carrying circular nut is contained on the heavily loaded screw rod, between carrying circular nut and base bearing is housed, and spring is equipped with in the bearing below, the servomotor output shaft is connected with the carrying circular nut, gear is made in the carrying circular nut outside, on the described base micro-caliper is installed, and micro-caliper is connected with electronic amplifier by lead.
Gear on gear being housed on the described servomotor output shaft and carrying the circular nut outside is meshed.
Be provided with the gap between described carrying circular nut and the base.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Heavy load workpiece and synchronous be can prop up gently, oil cylinder and heavily loaded moving followed with the lifting process of oil cylinder; Still can effectively support heavy load workpiece in the time of suddenly disappearing at the oil pressure of oil cylinder, but heavily loaded landing is avoided in the just self-locking maintenance of servo-actuated studdle, has guaranteed the safety of heavy load workpiece jacking.
Description of drawings
Fig. 1 is screw rod follow-up supporting mechanism running condition figure of the present utility model.
Fig. 2 is the utility model and jacking cylinder unitized construction scheme drawing.
Fig. 3 is the utility model follow-up supporting device structural representation.
Fig. 4 is the utility model electronic amplifier frame principle figure.
The specific embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
As Fig. 1, shown in Figure 3, be screw rod follow-up supporting mechanism of the present utility model, it is made up of the servo-actuated studdle of several band bearings.Comprise base 1, servomotor 2, carrying circular nut 3, heavily loaded screw rod 4, micro-caliper 5, electronic amplifier 6, bearing 7 and spring 8 etc.
The utility model adopts heavily loaded screw rod 4 is installed on base 1, and carrying circular nut 3 is sleeved on the heavily loaded screw rod 4, between carrying circular nut 3 and base 1 bearing 7 is housed, to alleviate the friction force between carrying circular nut 3 and the base 1.Spring 8 is equipped with in bearing 7 belows, makes 1 of heavily loaded circular nut 3 and bearing form a gap delta.On servomotor 2 output shafts gear is housed, gear is made in carrying circular nut 3 outsides, gear is connected with the gear mesh of carrying on the circular nut 3, micro-caliper 5 is installed on the described base 1, micro-caliper 5 is connected with electronic amplifier 6 by lead, detects the gap delta between carrying circular nut 3 and the bearing 1 in real time.
As shown in Figure 4, amplification is input to variable-frequency governor after Drive and Control Circuit converts analog signal to the difference of gap delta and micro-caliper through op amp, by variable-frequency governor control motor speed.The signal output of op amp is controlled turning to of motor through phase inverter output rotating signal.
Principle of work of the present utility model and working process:
Be provided with the servo-actuated studdle of one or several band bearings near the utility model jacking cylinder, the servo-actuated studdle props up heavy load workpiece 9 and synchronous with the jacking process of oil cylinder gently, follows heavy duty and moves.Because hang with a carrying circular nut 3 on heavily loaded screw rod 4, gear is made in the outside of carrying circular nut 3, a servomotor drives heavily loaded circular nut 3 rotations by tooth-like transmission device; Micro-caliper 5 is installed on bearing 1, constantly measure the gap of 1 of heavily loaded circular nut 3 and bearing, to judge the tracking mode of heavily loaded screw rod and heavy load workpiece 9, the tracking error signal that micro-caliper 5 records, be input to control loop, drive servomotor 1 and drive heavily loaded circular nut 3 rotations, promote heavily loaded screw rod 4 liftings, constantly eliminate tracking error.Follow the tracks of in case oil cylinder rapid decompression, heavily loaded circular nut 3 have little time rotation, but the just self-locking maintenance of heavily loaded screw rod 4 is supported in servo-actuated, effectively the rest heavy load workpiece is avoided heavily loaded landing, has guaranteed the safety of heavy load workpiece jacking
Heavy duty circular nut 3 is held up by the spring in the bearing 1 slightly with heavily loaded screw rod 4, make 1 of heavily loaded circular nut 3 and bearing form a gap delta, servomotor 2 drives heavily loaded circular nut 3 by tooth-like driving device and rotates, heavily loaded screw rod 4 is stretched, when heavily loaded screw rod 4 props up workpiece, spring is compressed, and gap delta reduces gradually, until δ=δ
0Servomotor stops operating, and the micro-caliper of installing on the bearing 15 is constantly measured the gap delta of 1 of carrying circular nut 3 and bearing, and rotates by electronic amplifier 6 control servomotors 2, as δ 〉=δ
0The time, servomotor 2 is just changeing stretches out heavily loaded screw rod 4, as δ≤δ
0The time, servomotor 2 counter-rotatings make heavily loaded screw retract, so heavily loaded screw rod is constantly followed the tracks of the heavy load workpiece lifting, in case oil cylinder rapid decompression, external load is pushed down heavily loaded screw rod rapidly, make heavily loaded circular nut have little time to follow the tracks of and, avoided heavy load workpiece, guaranteed the safety of heavy load workpiece jacking because of the landing of oil cylinder decompression by self-locking.
The utility model also can make up servo-actuated heavy duty screw rod and jacking cylinder as shown in Figure 2.
Claims (4)
1, a kind of screw rod follow-up supporting mechanism of hoisting device, comprise bearing (1), it is characterized in that: described base (1) is gone up heavily loaded screw rod (4) is installed, carrying circular nut (3) is contained on the heavily loaded screw rod (4), between carrying circular nut (3) and base (1), bearing (7) is housed, spring (8) is equipped with in bearing (7) below, servomotor (2) is connected with carrying circular nut (3), carrying circular nut (3) outside is shaped on gear, described base (1) is gone up micro-caliper (5) is installed, and micro-caliper (5) is connected with electronic amplifier (6) by lead.
2, the screw rod follow-up supporting mechanism of hoisting device according to claim 1, the gear that it is characterized in that gear being housed on the described servomotor (2) and carrying circular nut (3) outside is meshed.
3, the screw rod follow-up supporting mechanism of hoisting device according to claim 1 is characterized in that on described servomotor (2) output shaft gear being housed.
4, the screw rod follow-up supporting mechanism of hoisting device according to claim 1 is characterized in that between described carrying circular nut (3) and the base (1) gapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202168609U CN201305425Y (en) | 2008-11-20 | 2008-11-20 | Screw rod follow-up supporting mechanism of hoisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202168609U CN201305425Y (en) | 2008-11-20 | 2008-11-20 | Screw rod follow-up supporting mechanism of hoisting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201305425Y true CN201305425Y (en) | 2009-09-09 |
Family
ID=41097890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202168609U Expired - Fee Related CN201305425Y (en) | 2008-11-20 | 2008-11-20 | Screw rod follow-up supporting mechanism of hoisting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201305425Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477800A (en) * | 2010-11-23 | 2012-05-30 | 上海先科桥梁隧道检测加固工程技术有限公司 | Gapless hydraulic driving following support system |
| CN102602846A (en) * | 2012-04-01 | 2012-07-25 | 许昌义 | Full-automatic lifting system with protective jack |
| CN103253609A (en) * | 2013-04-27 | 2013-08-21 | 中国长江三峡集团公司 | Jacking fixing system |
| CN108584830A (en) * | 2018-05-14 | 2018-09-28 | 长江三峡通航管理局 | A kind of hydraulic jack and control method with mechanical self-latching protective device |
| CN112279133A (en) * | 2020-01-19 | 2021-01-29 | 长江三峡通航管理局 | Mechanical jack with servo driving device |
-
2008
- 2008-11-20 CN CNU2008202168609U patent/CN201305425Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477800A (en) * | 2010-11-23 | 2012-05-30 | 上海先科桥梁隧道检测加固工程技术有限公司 | Gapless hydraulic driving following support system |
| CN102602846A (en) * | 2012-04-01 | 2012-07-25 | 许昌义 | Full-automatic lifting system with protective jack |
| CN103253609A (en) * | 2013-04-27 | 2013-08-21 | 中国长江三峡集团公司 | Jacking fixing system |
| CN103253609B (en) * | 2013-04-27 | 2015-09-30 | 中国长江三峡集团公司 | Top jacking system |
| CN108584830A (en) * | 2018-05-14 | 2018-09-28 | 长江三峡通航管理局 | A kind of hydraulic jack and control method with mechanical self-latching protective device |
| CN112279133A (en) * | 2020-01-19 | 2021-01-29 | 长江三峡通航管理局 | Mechanical jack with servo driving device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20141120 |
|
| EXPY | Termination of patent right or utility model |