CN2063512U - Weight, moment and range limiting apparatus - Google Patents
Weight, moment and range limiting apparatus Download PDFInfo
- Publication number
- CN2063512U CN2063512U CN 90210865 CN90210865U CN2063512U CN 2063512 U CN2063512 U CN 2063512U CN 90210865 CN90210865 CN 90210865 CN 90210865 U CN90210865 U CN 90210865U CN 2063512 U CN2063512 U CN 2063512U
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- China
- Prior art keywords
- weight
- axle
- moment
- tower crane
- utility
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Abstract
The utility model discloses a weight, moment and range limiting apparatus which belongs to the integrative safety device of the level luffing tower crane. The weight, moment and range limiting apparatus comprises a limiter (1), a weight outgoing device (2) and an alarm (3). The utility model is not limited by the structure of the tower crane. The back side of the guide pulley of the jib root of the jib of the tower crane is drilled with two holes of phi 16 mm, and the weight outgoing device (2) can be installed by using the holes. A chainwheel is installed at the axle end of the pulling barrel, two holes of phi 11 mm are drilled on a machine frame, and the limiter (1) can be installed by using the two holes. The utility model has the advantages of high sensitivity, small size, convenient installation and maintenance. The utility model is suitable for the level luffing tower crane of 16 ton meters, 25 ton meters, 40 ton meters, 60 ton meters, 80 ton meters and 120 ton meters.
Description
The utility model is to belong to the level luffing Safety Device for Tower Crane.
Safety Device for Tower Crane is divided mechanical type and electronic type two big classes at present.Wherein mechanical type is divided into the board-like and coordinate formula moment demonstration killer of bow again.Bend board-like volume greatly can only restraining moment can not maximum weight and amplitude.Coordinate formula moment shows that killer can not be changed arbitrarily by the restriction of tower crane amplitude variation reel rope outlet direction, and curve ruler is to be that center of circle rotation exists can't overcome overproof with the spiral shell axle.Electronic type limiter of moment such as QLX-3 type instrument volume are big, and electric elements are installed on the elevator boom rack, by dress and maintenance and debugging difficulty.
The purpose of this utility model provides a kind of mechanical safety device that is applicable to the level luffing tower crane, and it is not limited by level luffing tower crane amplitude variation reel rope outlet direction.Have that volume is little, precision is high, price is low, be convenient to by debuging advantages such as examination.
Below in conjunction with description of drawings embodiment of the present utility model.
Weight, moment, amplitude limiter are made up of killer (1), weight transmitter (2), annunciator (3).As Fig. 1 and shown in Figure 4.At the sprocket wheel (8) of amplitude-changing drum axle (10) end dress, be as the criterion by dress killer (1) with sprocket wheel (8) and sprocket wheel (18) plane with the synchronous rotation of axle.Weight transmitter (2) is installed in crane arm rear end channel-section steel (7), leading sheave (6) back.Annunciator (3) is installed in the operator's compartment.
Weight transmitter (2) as shown in Figure 3.Form by pulley (212), bearing pin (213), support (220), connecting plate (211), connecting shaft (22), axle (23), compression spring (21), transverse axis (217), nut (218), adapter shaft (24), spiral pin (25), regulating plate (28), supporting screw (27), spiral shell axle (29), flexible axle (4), axle core (17), top fastening bolt (210).Pulley (212) ejects 3-4cm with hoist rope (5).When promoting weight, be center of circle rotation with bearing pin (213), make compression spring (21) compression, make axle (23), nut (218) one ends stretch out transverse axis (217) because the diametral load that steel rope (5) produces makes pulley (212).When lifting weight reaches tower crane weight, two nuts (218) are transferred to and interval, transverse axis (217) bottom surface 3mm, itself and axle (23) are fixed, make spring (21) be subjected to giving stress.When the lifting weight had only near the regulation hoisting capacity, spring (21) just can make connecting shaft (22), and further compression was mobile thereupon.Regulating plate (28) band screw and elongated slot can be shifted one's position on request, are linked to be hinge shape by spiral pin (25) and connecting shaft (24).Because the effect of supporting screw (27) makes regulating plate (28) other end perk.Flexible axle (4) Guan Yiduan is fixed on the regulating plate (28), and axle core (17) is fixed on the spiral shell axle of fixing with connecting plate (211) (29).When lifting weight reached the biggest lifting capacity, axle core (17) is drawn out was transferred to 6cm, and imports in the killer (1).
Killer (1) as shown in Figure 2.By chain (9), sprocket wheel (18), screw mandrel (11), guide shaft (13), insulation curve ruler (19), bolt (116), bolt (118), extension spring (117), chute (119), rolling steel balls (120), backguy flexible axle (4), axle core (17), nut (112) moves about, bump sheet (14), bump sheet (110), bump sheet (121), micro-switch (111), axle (122) is bumped in the contact, axle sleeve (114), micro-switch (12), micro-switch (16), and the contact curve (15) that is fixed on the insulation curve ruler (19) is formed.Flexible axle (4) the pipe other end is fixed on killer (1) casing as Fig. 2.Axle core (17) is fixed on curve ruler (19) on the bolt of one (116) with extension spring (117), flexible axle (4), axle core (17) pass to weight transmitter (2) simulation hoisting capacity on the curve ruler (19), curve ruler (19) upwards rolls by steel ball (120), makes perpendicular movement along square chute (119) between casing and the lid.When work range changed, reel (10) rotated by sprocket wheel (8) and through chain (9) drive sprocket wheel (18) screw mandrel (11) is rotated.Nut (112) and be fixed on micro-switch (111) on the nut that moves about (112), bump sheet (1 10), bump that sheet (121) bumps sheet (14) and with to bump sheet (14) fixing and non-conductive bumps axle (122), axle sleeve (114) moves horizontally moves about.Curve ruler (19) in the killer (1) is according to actual hoisting capacity of various tower cranes and amplitude characteristic, forms through weight transmitter (2) actual measurement and calculating.When promoting, the lifting sport car differs from 5% when reaching the biggest lifting capacity, weight transmitter (2) is by mandrel (117), curve ruler (19) is mentioned, making the contact bump axle (122), axle sleeve (114) contacts with contact curve (15) straight line portion, annunciator (3) sends signal, and the bright buzzer phone of alarm lamp rings.If exceed the biggest lifting capacity 5%, contact curve (15) can continue to promote, forcing the contact to bump axle (122) is upwards counter-rotating of the center of circle with spiral shell axle (113), make and bump sheet (14) upper end shake-up micro-switch (111), cut off the control power supply that promotes with outside luffing, it can only be returned reach the restriction biggest lifting capacity.Tower machine sport car exceeds biggest lifting capacity scope, reduces characteristic curve of formation gradually with amplitude increases hoisting capacity, and the weight of any point and amplitude product are exactly the maximum hoisting moment that is allowed on the curve.
Under killer (1), weight transmitter (2), annunciator (3) inner structure unmodified situation, as long as actual conditions according to various tower machines, change the diameter of compression spring (21), make flexible axle (4), axle core (17) pull out length and keep 6cm, need not change the amplitude-changing drum rope outlet direction, only killer (1) body is rotated 180 °, just go for 16 tons of rice, 25 tons of rice, 40 tons of rice, 60 tons of rice, 80 tons of rice, 120 tons of rice all kinds tower machines.
Electric part block scheme and schematic diagram are as shown in Figure 4.The electric annunciator (3) that removes is installed in the operator's compartment, and all the other all are contained in the killer (1).Each micro-switch is gone here and there respectively on the coil of each control button AC contactor of operator's compartment.X
1And X
2Be the micro-switch K(1-2 of control automatic stop) joint, by when dress by joint with K(1-2) be serially connected in motor backward on the luffing ac contactor coil.X
3, X
4, X
5Be the micro-switch K of control automatic stop
1Joint (1-4), by when dress by joint with K
2(1-4) be serially connected in and promote motor and forward on the ac contactor coil of luffing motor.X
4, X
6Be the micro-switch K of control automatic stop
3Joint (1-6), by when dress by joint with K
3(1-6) be serially connected on the ac contactor coil of luffing motor.Annunciator (3) is connected on the touch block (125), and lead is through the B hole of the nut that moves about (112), and the C point that bumps axle (122) and contact curve (15) with the contact is fixed respectively.Insert the 6V power supply, when two contacts contact, send alerting signal.
During work tower machine lifting sport car is placed maximum functional amplitude position, simultaneously with the nut that moves about (112) of killer (1), bump sheet (110) and be transferred to and just touch micro-switch (16) and cut off luffing control power supply forward, make it can only return movement.Connect sprocket wheel (8) and sprocket wheel (18) with chain (9), the lifting sport car is to returning luffing, and sprocket wheel (8) drives sprocket wheel (18) by chain (9) and makes screw mandrel (11) rotation.The nut (112) that moves about returns along guide shaft (13).When the lifting sport car reaches minimum radius, utilize tuning plate (124) to make to bump sheet (121) to touch micro-switch (12), cut off the work range that returned the control power limitations.When the tower machine promoted Different Weight, compression spring (21) was mentioned curve ruler (19) by flexible axle (4), axle core (17) or is put down, and makes curve ruler (19) make perpendicular movement.Be on duty 5% when reaching maximum lift weight or promoting moment, axle (122) is bumped in the contact, axle sleeve (114) is run into contact curve (15) and sent alerting signal.If overweight sport car continues outside luffing when reaching super moment 5%, it is that the center of circle rotates up with spiral shell axle (113) that contact curve (15) forces the contact to bump axle (122) again.Make and bump the sheet top and touch micro-switch (111) once more, cut off promoting and outside luffing control power supply, make it limit hoisting moment, reached the security insurance purpose as return action.The utility model compared with prior art has advantage.
The utility model has following accompanying drawing:
Fig. 1, weight, moment, amplitude limiter structural representation.
Fig. 2, killer assembly drawing.
Fig. 3, weight transmitter assembly drawing.
Fig. 4, electrical block diagram and electrical schematic diagram.
Claims (1)
1, a kind of weight, moment, amplitude limiter of forming by killer (1), weight transmitter (2), annunciator (3), the axle core (17) that it is characterized in that killer (1) is fixed on curve ruler (19) on the bolt of one (116) with extension spring (117), flexible axle (4), axle core (17) pass to weight transmitter (2) simulation hoisting capacity on the curve ruler (19), curve ruler (19) upwards rolls by steel ball (120), make perpendicular movement along square chute (119) between casing and the lid, touch the contact and bump axle (122).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90210865 CN2063512U (en) | 1990-04-12 | 1990-04-12 | Weight, moment and range limiting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90210865 CN2063512U (en) | 1990-04-12 | 1990-04-12 | Weight, moment and range limiting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2063512U true CN2063512U (en) | 1990-10-10 |
Family
ID=4890726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90210865 Withdrawn CN2063512U (en) | 1990-04-12 | 1990-04-12 | Weight, moment and range limiting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2063512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343023B (en) * | 2008-08-05 | 2010-06-02 | 李来友 | Comprehensive protector for safety of tower crane |
-
1990
- 1990-04-12 CN CN 90210865 patent/CN2063512U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343023B (en) * | 2008-08-05 | 2010-06-02 | 李来友 | Comprehensive protector for safety of tower crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |