CN1007469B

CN1007469B - Magnetic system for rapid interruption

Info

Publication number: CN1007469B
Application number: CN 87101151
Authority: CN
Inventors: 霍斯特·茨拉斯科
Original assignee: Felten and Guilleaume Energietechnik AG
Current assignee: Felten and Guilleaume Energietechnik AG
Priority date: 1986-12-19
Filing date: 1987-12-18
Publication date: 1990-04-04
Also published as: DE3774115D1; EP0278064B1; GR3003186T3; EP0278064A1; BR8706829A; DE3643510A1; CN87101151A

Abstract

A magnet system for rapid disconnection, the armature retention (7) of a magnet system as a leaf spring (71) with a box- shaped extension (72) which can be plugged on to the free pole piece (3), the leaf spring being bent and connected to the end of the hinged armature (4) projecting beyond the free pole piece, and by the tension spring (8) being suspended with its eye (81) in a hole (41) of the hinged armature, and by the free end of the tension spring being held by a lengthened part (51) of the coil body (5), which part is firmly connected to the base plate (13) by means of pin-shaped projections (52). The area of use relates to circuits in which rapid disconnection is required. These are primarily apparatuses such as multiple instruments which must be protected against excess currents and voltages. They also include circuit breakers which are intended to protect downstream apparatuses against excess currents and voltages.

Description

Magnetic system for rapid interruption

The present invention relates to magnetic system for rapid interruption.

Known DE-PS2029607 is described for this type of magnetic force systems.This magnetic force systems that is contained in the plastic casing that relay uses has a rocking arm armature, and armature utilizes the armature bracket of a sheet spring formula.This sheet spring is contained on the bobbin of magnetic force systems, and bobbin needs comparatively roomy installation.Will make armature produce longitudinal sliding motion like this, thereby make the sharp edge of corresponding pole shoe rear side be subjected to serious wearing and tearing.Because the bobbin that is contained on another pole shoe leaves certain allowance of moving about, so can not keep strict size relationship.Because extension spring will hang on the aperture on the base vertical with axle of spring, thus comparatively difficulty is installed, and extension spring is very important in interacting with the sheet spring, it plays main effect in the action of rocking arm armature.

In DE-PS2000138 also relevant for the description of the similar magnetic force systems of another kind.Armature bracket in this cover system also is a design spring structure in blocks, and an end of sheet spring is fixed on the pole shoe, and the other end then is connected with rocking arm armature.A helical spring also is housed, gently is pressed on the rocking arm armature, be used for the cut-out of magnetic circuit.But owing to structural reason, the relation between rocking arm armature and sheet spring and the helical spring is quite complicated, and the workload of adjustment is very big.

Therefore, basic task of the present invention is exactly that above-mentioned magnetic force systems is done further exploitation, and purpose is to improve the long-time stability of existing magnetic force systems and the reliability of function.Because existing problem is to come from mechanically mostly in the magnetic force systems, so main purpose is to improve the movable part of this system, for example rocking arm armature, armature bracket and extension spring etc.

According to the present invention,, can finish above-mentioned task by the comprehensive every design feature described in the claim 1.

The invention has the advantages that to have prolonged mechanical useful life, improved automatization level.The sheet spring is arranged on the pole shoe in simple mode, and it is stable that the size relationship between pole shoe bobbin and the armature keeps, and the free end of extension spring is inserted between the elongated portion and base plate of bobbin, and everything is for realizing all contributions to some extent of above-mentioned purpose.

Further exploitation to listed target in the claim 1 describes in detail in each dependent claims.

For example, the theoretical bending point of sheet spring is selected in the top of the sharp edge of idle pole shoe, an advantage (seeing claim 3) exactly.The function of sheet spring not only is to guide reliably the motion of pole shoe, thereby armature is always dropped on the same point of relative pole shoe, and because the relation of shape own, the sheet spring also plays balance because armature touches the effect of that part of component that the rear sharp edge produced, and makes can alleviate the load that is added on this sharp edge at least.Through suitably choosing the component of reaction that produces by the sheet spring, armature is disengaged with this sharp edge in the motion process of its slight impact fully, thereby make this sharp edge in the whole life of magnetic force systems fully less than wearing and tearing.

Because theoretical bending point is extremely important to the function of armature, on the residue edge of sheet spring, select the method for gap that bending point is fixed so adopt, be a kind of favourable measure (claim 4).

In order to settle armature bracket, adopt a box-like extension, it makes a kind of very favorable form in advance, can be by elastic card on the pole shoe of free time (claim 5).

Except above-mentioned measure, can also adopt the method for spot welding, box-like extension both sides are fixed on idle boots extremely go up, armature bracket can accurately be located.(claim 7).

Do otch at box-like extension four jiaos, then the otch side is outwards turned down, make it to be convenient to be installed in (claim 8) on the armature bracket.

With regard to extension spring, its free end must insert the extension of bobbin from the below, and utilizes fixedly extension spring of base plate, makes unlikely drop out (claim 9) in extension spring end.

Design example of the present invention is seen accompanying drawing, and is described in detail below:

Fig. 1 represents the armature side cutaway view of closed magnetic force systems,

Fig. 2 represents the magnetic force systems that armature disconnects,

Fig. 3 represents the front view of the armature bracket of this cover system,

Fig. 4 is an end view,

Fig. 5 is a plan view,

Fig. 6 represents the vertical view of the another kind design of armature bracket.

By Fig. 1 and 2 as seen, in this cover magnetic force systems, a yoke (1) is arranged, two pole shoes (2) and (3) are arranged on the direction vertical with it.Rocking arm armature (4) at two pole shoe upper supports, armature contacts gently in the top of the sharp edge (31) of pole shoe (3).For this reason, rocking arm armature extends and exceeds the upper surface of pole shoe (3).Rocking arm armature supports with armature bracket (7), and support is made of the extension (72) of sheet spring (71) and box-like.The sheet spring is connected on the tie point (73) of rocking arm armature extension, and its boxlike extension then is sleeved on the pole shoe (3), and bobbin (5) is housed on pole shoe (2), is wound with coil on the bobbin.Above rocking arm armature, there is the place of a segment distance that a drive rod (6) that passes loam cake (12) is arranged from pole shoe.A hole (41) is arranged on the extension of rocking arm armature, in the hole, hang the spring hook (81) of extension spring (8).A theoretical bending point (74) is arranged on the sheet spring, be positioned at sharp edge (31) top of pole shoe (3).Bobbin (5) has an elongation end (51), and a jack (10) is arranged on the elongation end, is used for plug-in mounting extension spring (8).For this purpose, the tail end of extension spring has two circles around must be bigger than the diameter of other circles.This two coil spring is put into a groove (131) lining on the base plate (13).Because the diameter of these two last coil springs greater than jack (10), so put last this two coil spring into groove, is contained in bobbin on the base plate again, just the bottom of extension spring can be fixed.Bobbin has several bar-shaped supporting legs (52) to inject in the hole on the base plate, welds fixing then.Also have the another one groove on the base plate, a permanent magnet (11) is housed in this groove.

By Fig. 3 to 5 as seen, armature bracket (7) is made of sheet spring (71) and box-like extension (72).The tie point of sheet spring and rocking arm armature is designated as (73).The position of the theoretical bending point (74) on the sheet spring should be selected in after armature bracket is contained on the pole shoe (3), and this bending point just in time is positioned at the sharp edge top of this pole shoe.The perforate (75) of a shape approximation in rectangle arranged on the sheet spring.Two edges (76) that stay after the perforate should design to such an extent that make the rocking arm armature can free movement.In order to make the box-like extension have the function of loading spring, in advance its frame bent angle (77) is made less than 90 °.For the ease of going up armature bracket is installed at pole shoe (3).Make breach (78) at the inferior horn of frame, a section with gap on the side outwards turns down a little again.

As shown in Figure 6, can also utilize breach (79) to determine theoretical bending point.

Claims

1, magnetic system for rapid interruption, comprise a yoke that pole shoe is housed, one armature bracket is housed shake example armature, the extension spring that reset force is provided to armature, the bobbin that can be contained on the pole shoe and be wound with coil, a permanent magnet, and shell that is used for installing this grip assembly of forming by base plate and cover plate, it is characterized in that, armature bracket (7) is designed to have the sheet spring structure (71) of one section box-like extension (72), extension can be sleeved on the idle pole shoe (3), makes the sheet spring crooked and be connected the tail end that shakes example armature (4), and shaking example armature, to cross idle pole shoe protruding; Extension spring (8) has a spring hook (81), be used for hanging on the aperture (41) that shakes example armature, the position of aperture is near sheet spring and the tie point (73) that shakes example armature, the free end of extension spring utilizes elongation end (51) fix in position of bobbin (5), and bobbin utilizes cylindrical supporting leg (52) to be fixed on the base plate (13).

2, according to the magnetic force systems described in the claim 1, it is characterized in that, an approximate rectangular opening (75) is arranged on the sheet spring (71), and left two edges (76) of opening portion will just in time be positioned at the both sides of armature (4), and armature can be moved freely between edge.

According to the magnetic force systems described in claim 1 or 2, it is characterized in that 3, the theoretical bending point (74) of sheet spring (71) just in time is positioned at the top of idle pole shoe sharp edge (31), and in the scope of theoretical bending point, the cross section of edge (76) diminishes.

According to the magnetic force systems described in claim 1 or 2, it is characterized in that 4, theoretical bending point (74) is determined by the position of the breach of choosing (79) on edge (76).

5, according to the magnetic force systems described in claim 1 or 2, it is characterized in that, box-like extension (72) is made the version that can elasticity be installed on the idle pole shoe (3).

According to the magnetic force systems described in claim 1 or 2, it is characterized in that 6, box-like extension (72) has the bent angle (77) less than 90 °.

According to the magnetic force systems described in claim 1 or 2, it is characterized in that 7, box-like extension (72) adopts the mode of spot welding that both sides are fixed on the idle pole shoe (3).

8, according to the magnetic force systems described in claim 1 or 2, it is characterized in that, box-like extension (72) gap on four jiaos an of end of yoke (1), and gap segments (78) slightly outwards turned down.

According to the magnetic force systems described in claim 1 or 2, it is characterized in that 9, extension spring (8) is injected in the elongation end (51) of bobbin by the below, and utilizes base plate (13) fix in position.

According to the magnetic force systems described in claim 1 or 2, it is characterized in that 10, the slightly larger in diameter of the last two ring spring circles of the close base plate (13) of extension spring (8) is in the diameter of other spring coils.

According to the magnetic force systems described in claim 1 or 2, it is characterized in that 11, extension spring (8) is contained in the groove (131) of base plate (13), make the end of extension spring form annulus, its end face is perpendicular to the axis of extension spring.