CN86203359U - Contactless magnetic switch - Google Patents
Contactless magnetic switch Download PDFInfo
- Publication number
- CN86203359U CN86203359U CN 86203359 CN86203359U CN86203359U CN 86203359 U CN86203359 U CN 86203359U CN 86203359 CN86203359 CN 86203359 CN 86203359 U CN86203359 U CN 86203359U CN 86203359 U CN86203359 U CN 86203359U
- Authority
- CN
- China
- Prior art keywords
- switch
- hanger
- contact
- over swith
- change
- 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.)
- Ceased
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- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a contactless magnetic switch used in the crane, and automatically controlling the lift of the hanger. The switch comprises a permanent magnet arranged on the hanger. The magnetic switch is arranged under the lifting drum or under the bottom beam of the small vehicle of the lifting drum. When in operation, the hanger is not required to contact with the switch, and can do large angle irregular heavy exercise in any direction under the switch. When the hanger is 50 to 500 millimetres away from the terminal point [the particular position can be adjusted according to the actual demand], the tasks of automatic position limit and switch conversion are completed. The hanger can be used in other places needing no contact but position limit or alarm.
Description
Be used for the no touch magnetic force change-over swith on the hoisting crane.The utility model belongs to a kind of dead space switch that prevents that crane hook from hoisting and having an accident to terminal.
Malfunctioning or do not have a dress dead space switch that hoists at the hoisting crane limit switch.Suspension hook rises and is raised to terminal point and is not also found timely parking by the driver, will burn electrical motor, breaks steel rope, lifting hook pulley axle accident such as come off.Therefore the dead space switch that hoists of hoisting crane is the safety apparatus of hoisting crane indispensability.The limit switch of Cai Yonging had catch pin type in the past, weight hammer type, contact, styles such as spindle nose screw type.
Task of the present utility model is in order to prevent the generation of accident effectively, overcome the malfunctioning fault of limit switch that limit switch is damaged or cause because of mechanical wear because of the irregular strenuous exercise of suspension hook, improve traditional limit method, improve the reliability of service life of limit switch and limit accuracy and limit switch and practicality and a kind of suspension hook of design-calculated terminal point no touch magnetic force change-over swith that hoists.
Fig. 1 is the structural representation of the utility model no touch magnetic force change-over swith.
Basic conception of the present utility model is that a permanent magnet is installed above the pulley of suspension hook, presses vertically direction of magnetic pole, is fixed to the top of lifting hook pulley. The clamping plate of suspension hook and pulley also can directly use with the permanent-magnet material manufacturing, make the lifting hook pulley group, become the magnet (hereinafter to be referred as magnet) of a permanent magnet. The high magnetic conduction iron nickel soft magnetic materials that favorable elasticity is arranged is used in center directly over magnet vertically hoists near terminal point, Make change-over switch (8) as shown in the figure. (also can use JAG-5Z type tongue tube as change-over switch). The normally closed interlock of change-over switch (4) is connected in series (hereinafter to be referred as the A group) with the contactor coil that the control suspension hook hoists. The normally open contact of change-over switch (7), can receive on the control coil with two groups of normally closed main contact contactors (hereinafter to be referred as the B group). The power line of the motor that suspension hook is hoisted is concatenated on the normally closed main contact of contactor B group.
No touch magnetic force change-over swith by above-mentioned design manufacturing, when operation, when magnet (9) near change-over swith (8) to needs spacing apart from the time, (in the dotted line scope as shown in the figure, promptly magnetism intensity can make the range distance of change-over swith internal conversion spring strip contact (5) action.Spacing distance also can be adjusted between 50mm-500mm by actual needs) conversion spring strip contact (5) in the change-over swith utilizes that ferromagnetic there is a natural attraction between the sexes, the principle that the same sex is torn open mutually, under the attraction of magnet (9) magnetic force, make conversion spring strip contact (5) and normally open contact (7) adhesive.Disconnect normally closed interlock (4), promptly disconnect the control coil power supply of the contactless switch A group that the control suspension hook hoists, make its release, disconnect main contact, promptly disconnect electrical motor that the control suspension hook the hoists power supply that hoists.Because of the conversion spring strip contact (5) in the change-over swith and normally open contact (7) adhesive, connect the control coil power supply of contactless switch B group, make its adhesive, disconnect electrical motor that the control suspension hook of string on the normally closed main contact of contactless switch B group the hoist power supply that hoists.After the control coil outage that prevents to control the contactless switch A group that suspension hook hoists discharged, because of the contact adhesion, electrical motor remained in operation and makes suspension hook continue to hoist and have an accident.And can when normally open contact (7) is connected, connect alarm bell again, driver reaches the purpose of multiple security insurance.
Experience spring strip contact (5), normally closed interlock (4) and the normally open contact (7) of magnetic force in the change-over swith and regulate all vertical suspension hook that installs and fixes of the magnetic pole of bar magnet (6) and work vertical centre top when being raised to terminal point.Magnetic pole on the magnet (9) and the magnetic pole of regulating bar magnet (6) are in the same way and all vertical up and down.Therefore change-over swith can be experienced the magnetic force that the following any orientation upper magnet (9) of switch goes up magnetic field and changes, do not need and the switch direct contact, therefore avoided the irregular strenuous exercise of suspension hook wide-angle to damage limit switch, or made the malfunctioning phenomenon inaccurate of limit switch with command range.Avoided the fault that takes place because of mechanical wear.No touch magnetic force change-over swith can also be used for kinetoplast and can not contact with the controlling point or do not need to contact and needs are spacing or the place of reporting to the police.And change-over swith can be chosen controlling party arbitrarily to installing.
Be most preferred embodiment of the present utility model below: as shown in the figure: the normally closed interlock (4) of magnetic force change-over swith (8), magnetic force are changed spring strip contact (5), normally open contact (7), are made with high magnetic conduction iron nickel soft-magnetic material, and conversion spring strip contact (5) also will have better elastic.With do not have ferromagnetic insulating material to be fixed into magnetic force change-over swith (8), regulate bar magnet (6), parallel with spring strip contact (5) and be vertically mounted on by the spring strip contact (5), form complete change-over swith (8).With screw (3), be connected to hoisting drum (1) guar plate (2) below, with the top, center of the vertical terminal point of permanent magnet (9).Permanent magnet (9) is consistent with the magnetic pole of regulating bar magnet (6), by clamping plate (10), nut (11) be fixed to lifting hook pulley (12) above, also can use the permanent-magnet material manufacturing to clamping plate (10), install and use, no longer install permanent magnet (9) additional.
Claims (1)
1, a kind of no touch magnetic force change-over swith that is used on the hoisting crane, it comprises permanent magnet [9], magnetic force change-over swith [8], regulates bar magnet [6], it is characterized in that said permanent magnet [9] is installed on the suspension hook, the conversion spring strip contact [5] in the magnetic force change-over swith [8], and normally closed interlock [4], normally open contact [7], with the parallel change-over swith [8] that installs and fixes into of magnetic pole of adjusting bar magnet [6].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86203359 CN86203359U (en) | 1986-05-19 | 1986-05-19 | Contactless magnetic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86203359 CN86203359U (en) | 1986-05-19 | 1986-05-19 | Contactless magnetic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86203359U true CN86203359U (en) | 1987-10-03 |
Family
ID=4806671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86203359 Ceased CN86203359U (en) | 1986-05-19 | 1986-05-19 | Contactless magnetic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86203359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533329A (en) * | 2018-10-16 | 2019-03-29 | 同济大学 | Magnetic suspension positioning device and unmanned plane and charging method for unmanned plane charging |
-
1986
- 1986-05-19 CN CN 86203359 patent/CN86203359U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533329A (en) * | 2018-10-16 | 2019-03-29 | 同济大学 | Magnetic suspension positioning device and unmanned plane and charging method for unmanned plane charging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |
Termination date: 19880413 |
|
| CE01 | Termination of patent right |