CN2397578Y

CN2397578Y - Direct-pushing type short distance brake electromagnet

Info

Publication number: CN2397578Y
Application number: CN 99229033
Authority: CN
Inventors: 田金铭; 陆振刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-30
Filing date: 1999-07-30
Publication date: 2000-09-20
Anticipated expiration: 2009-07-30

Abstract

The utility model relates to a direct-pushing type short distance brake electromagnet, which is composed of yoke iron, a lower cover, a fixed push rod, a movable push rod, an armature, a spring, an insulation screen, a starting and a holding coils, a holding power supply, and a starting circuit. The utility model is characterized in that induction electric potential can be utilized; electromagnetic force can be increased by 1.4 times; the induction electric potential of the two coils can not be conducted with even summation; breakdown of the element is reduced; starting current can be reliably cut off; the coils are not easy to burn, and electromagnetic motion force can be utilized. When an installation gap is zero, the product can still normally work, and the direct-pushing type short distance brake electromagnet can also save electricity, copper, and iron. Accordingly, the direct-pushing type short distance brake electromagnet is the product with small size, low cost, and good performance.

Description

A kind of direct-push short stroke braking electromagnet

The utility model relates to a kind of direct-push short stroke braking electromagnet, can be widely used in the braking of handling equipment, belongs to low-voltage electrical apparatus and electronic technology field.

Existing direct-push short stroke braking electromagnet has following weak point in technical scheme: 1, starting keeps the mutual coupling of induced potential of two coils, and element easily punctures.2, starting current full-wave direct current, the poor reliability that current over-zero cuts off, easy burn-out coil.3, with the full-wave direct current starting, the induced potential energy of coil can not obtain bigger utilization, and electromagnetic force is little, and coil is many with copper, and small product size is big.4,2-3 millimeter assemblage gap between the push rod of brake bracket and the braking electromagnet push rod, often because of brake shoes wearing and tearing, or the parts screw shaken loosening and diminished, and causes thrust to reduce to burn out motor, particularly often adjusts defective product because of assemblage gap and can not use in the use.

The purpose of this utility model is to overcome existing technical deficiency, and a kind of reliable operation is provided, and is not fragile, the direct-push short stroke braking electromagnet of saving metal material and energy.

The technical solution of the utility model, be achieved in that it by yoke, lower cover, be equipped with that fixedly street iron, spring, movable push bar, starting and hold-in winding, maintenance power supply and the starting circuit of push rod are formed.Place actuating coil and hold-in winding in the yoke, two coils link with keeping power supply and starting circuit respectively.The insulation screen that ground connection is set between two coils is worn-out, prevents the mutual even summation of induced potential.The fixedly armature of push rod is housed, be contained in the actuating coil hole and the hole of yoke internal magnetic pole in, spring one end contacts with the yoke internal magnetic pole, the other end is contained in the armature hole, with bolt lower cover and yoke is integral admittedly then, movable push bar is contained in the hole of yoke internal magnetic pole.Fixedly the length δ H in the push rod insertion yoke internal magnetic pole hole equals the rated travel of electromagnet.Movement travel A is greater than 1.5 δ H, and controlled by spring.Yoke internal magnetic pole length H equals 4.5 δ H.δ is an assemblage gap, general 2-3 millimeter.The movable push bar length L equals 2 δ H+ δ, designs electromagnetic motion power like this and obtains utilizing.All with ordinary steel, fixing push rod, movable push bar is all used not permeability alloys steel for yoke, armature, lower cover.Actuating coil, hold-in winding is the parallel connection stream diode that continues respectively, and hold-in winding is by single-phase full wave or halfwave rectifier power supply, and actuating coil is connected afterwards in parallel with AC power with one-way SCR, the trigger electrode of circuits for triggering and one-way SCR joins, and prolongs to cut circuit and circuits for triggering join.When the AC power access, hold-in winding gets.Circuits for triggering and Yan Qie circuit get simultaneously.At first circuits for triggering are with the one-way SCR conducting, and single-phase half-wave current passes through actuating coil, the armature adhesive, and fixedly push rod promotes movable push bar, drives brake bracket item bar and enters work.Prolong and cut circuit after time-delay, with the trigger voltage short circuit of circuits for triggering, when current over-zero, one-way SCR turn-offs, the actuating coil dead electricity, but hold-in winding continues electricly, and armature continues adhesive, during push rod is still in running order.Work as dump, the hold-in winding dead electricity, armature resets under the acting on of spring, and movable push bar resets under the counter-force effect of push rod, and work stops.

The utility model has following effect: induced potential is even summation mutually, reduced the puncture of element, the induced potential energy of single-phase half-wave current obtains utilizing during starting, improve 1.4 times of electromagnetic forces, and can reliably cut off starting current, coil is easy burn-out not, electromagnetic motion power has obtained utilization, when assemblage gap was reduced to zero, product still can operate as normal, and can save copper, joint iron, economize on electricity.

Below in conjunction with example, the utility model is further described:

Shown in the accompanying drawing, be embodiment of the present utility model:

Among the figure: 1-keeps power supply, 2-yoke, 3-bolt, 4-lower cover, 5-armature, 6-bullet

Spring, the 7-actuating coil, 8-insulation screen is worn-out, the 9-hold-in winding, the 10-movable push bar,

11-brake bracket push rod, 12-yoke internal magnetic pole hole, 13-is push rod fixedly, and 14-triggers

Circuit, 15-prolong cuts circuit, D ₁, D ₂-stream the diode that continues, D ₃-one-way SCR, D ₄-

Rectifier diode, the A-movement travel, δ H-rated travel, L-movable push bar length,

H-yoke internal magnetic pole length, δ-assemblage gap

Referring to accompanying drawing: place actuating coil (7) and hold-in winding (9) in the yoke (2), hold-in winding (9) joins with keeping power supply (1), actuating coil (7) and one-way SCR D ₃The series connection back is in parallel with AC power, and circuits for triggering (14) are connected on one-way SCR D ₃Trigger electrode, prolong and cut circuit (15) and circuits for triggering (14) and join, hold-in winding (9) flows diode D with in parallel respectively the continuing of actuating coil (7) ₁And D ₂Place the insulation screen worn-out (8) of ground connection between the two, the fixedly armature (5) of push rod (13) is housed, be contained in the hole of actuating coil (7) and in the internal magnetic pole hole (12) of yoke (2), spring (6) one ends are contained in the hole of armature (5), the other end contacts with the internal magnetic pole of yoke (2), uses bolt (3) that lower cover (4) and yoke (2) are integral admittedly then.Movable push bar (10) is contained in the internal magnetic pole hole (12) of yoke (2).Fixedly the length δ H in the internal magnetic pole hole (12) of push rod (13) insertion yoke (2) equals the rated travel of electromagnet.Movement travel A＞1.5 δ H, and control by spring (6).The internal magnetic pole length H=4.5 δ H of yoke (2).Assemblage gap δ is generally the 2-3 millimeter.Movable push bar length L=2 δ H+ δ.Yoke (2), armature (5), lower cover (4) are all used ordinary steel, and fixedly push rod (13), movable push bar (10) are all used non-magnetic steel alloy.When AC power inserts, hold-in winding (9) electric, simultaneously circuits for triggering (14), prolong and cut circuit (15) from diode D ₄Must be electric, the trigger voltage of circuits for triggering (14), one-way SCR D feeds ₃Trigger electrode, D ₃Conduction, single-phase half-wave current are by actuating coil (7), armature (5) adhesive, and fixedly push rod (13) promotes movable push bar (10), drive brake bracket push rod (11) and enter operating state.In addition, prolong cut circuit (15) through the time-delay after, with the trigger voltage short circuit of circuits for triggering (4), D during the starting current zero passage ₃Turn-off, actuating coil (7) dead electricity, but hold-in winding (9) still electric, armature (5) continues closure, brake bracket push rod (11) is still located operating state.Power supply disconnects, hold-in winding (9) dead electricity, and armature (5) is resetting under its counter-force effect with brake bracket push rod (11) under the effect of spring (6), and work stops.

Claims

1, a kind of direct-push short stroke braking electromagnet, by yoke 2, lower cover 4, fixedly push rod 13, armature 5, spring 6, movable push bar 10, actuating coil 7, hold-in winding 9, insulation screen we 8, stream diode D continues ₁, D ₂, one-way SCR D ₃, rectifier diode D ₄, circuits for triggering 14, prolong and cut circuit 15 and form, it is characterized in that: hold-in winding 9 joins with the output that keeps power supply 1, keeps input and the AC power of power supply 1 also to connect, and continues and flows diode D ₁With hold-in winding 9 and connect, keeping power supply 1 is single-phase full wave or single phase half wave rectification, actuating coil 7 and one-way SCR D ₃Series connection back and AC power also connect, and circuits for triggering 14 are connected on one-way SCR D ₃Trigger electrode on, circuits for triggering 14 are cut circuit 15 and are joined with prolonging again, prolong and cut circuit 15, circuits for triggering 14 and diode D ₄Series connection back and AC power also connect, and stream diode D continues ₂With actuating coil 7 and connect, the insulation that ground connection is set between hold-in winding 9 and the actuating coil 7 is shielded us 8, spring 6 is contained between the internal magnetic pole of armature 5 and yoke 2, the fixedly armature 5 of push rod 13 is housed, be contained in the hole of actuating coil 7 and in the internal magnetic pole hole 12 of yoke 2, movable push bar 10 is contained in the internal magnetic pole hole 12 of yoke 2.

2, a kind of direct-push short stroke braking electromagnet according to claim 1 is characterized in that: adorn non-magnetic fixedly push rod 13 on armature 5.

3, a kind of direct-push short stroke braking electromagnet according to claim 1 is characterized in that: in the internal magnetic pole hole 12 of yoke 2, adorn non-magnetic movable push bar 10.

4, a kind of direct-push short stroke braking electromagnet according to claim 1 is characterized in that: shock mount 6 between the internal magnetic pole of armature 5 and yoke 2.