CN1319241A

CN1319241A - Switch

Info

Publication number: CN1319241A
Application number: CN99810718.2A
Authority: CN
Inventors: C·塔姆
Original assignee: AEG Niederspannungstechnik GmbH and Co KG
Current assignee: General electric consumer and industrial limited liability company
Priority date: 1998-09-11
Filing date: 1999-08-09
Publication date: 2001-10-24
Anticipated expiration: 2019-08-09
Also published as: EP1110230A1; WO2000016358A1; EP1110230B1; AU5732599A; JP4321965B2; HUP0103736A2; DE19841685C2; DE19841685A1; HU223108B1; TW493190B; JP2002525796A; CN1208799C

Abstract

The invention relates to a switch fitted with an actuating lever (13) that may be actuated by an actuating handle (17) which engages in a toggle joint (6, 7) by means of a moving spring (18) that produces interaction between a switching shaft (3) for actuating a contact (1) and a ratchet lever (10) for controlling disconnection in case of an overload. The switch also has a catch lever (20) interacting with the actuating lever (13), which prevents the actuating handle (13) from moving to disconnecting position when the contact (1) is blocked, wherein the catch lever (20) can be automatically brought to a catch position in relation to the actuating lever by rotating the switch shaft (3) when the contact (1) closes.

Description

Switch

The present invention relates to according to claim 1 switch as described in the preamble.Especially, the present invention relates to have the low tension switch of Lock Part, when the closing of contact of switch, Lock Part prevents that driving handle from moving to trip position.

The low tension switch that publication DE 38 02 184 C2 that put on display disclose comprises Lock Part, forms lock link.Particularly, this low tension switch has drive rod, can move by driving handle, and by the driving spring device, act on the toggle coupling part, one end of toggle coupling part is connected on the contact support shaft, and the other end is supported on the ratchet bar, discharges excessive electric current by ratchet bar control low tension switch.The toggle coupling part shows that toggle connects connecting rod and is arranged in by this way on the plane identical with sway chain, and promptly an end of lock link is coupling regularly on the latch box, and the other end is connected with drive rod.This means when the contact to be melted to a time-out that only with mobile drive rod, till lock link contact toggle connected connecting rod, wherein lock link was connected on the drive rod.If driving handle is moved further on the direction in tripping operation, lock link connects the momentum that produces the tripping operation direction on the connecting rod at toggle, when being melted to together contact and rupturing simultaneously, makes driving handle only to move on the tripping operation direction.By this way,, design by this mechanically to prevent from driving handle is moved to trip position, make the personnel of control low tension switch can discern this situation easily, carry out suitable repairing measure when the contact is melted to a time-out.

The purpose of this invention is to provide low tension switch, wherein under the contact is melted to together situation,, can prevent more safely that driving handle from moving to trip position when the contact is melted to a time-out.

Combination of features by definition in the claim 1 achieves this end.The present invention further favourable development indicates in appended claims.

The present invention by embodiment with reference to the accompanying drawings, will more specifically be explained in the back.

Among the figure:

Fig. 1 is the low tension switch according to embodiment, and at the cutaway view of "on" position, wherein driving handle is at closing position;

Fig. 2 is the enlarged diagram of the low tension switch intraware that shows of Fig. 1, and its medi-spring is at the axle that is fixed on the drive rod, and tensioning between the toggle connecting axle, drives toggle simultaneously and connects connecting rod and ratchet bar;

Fig. 3 is the enlarged diagram of the assembly that shows among Fig. 2, additionally shown drive box side plate and releasing device cooperate wherein releasing device and ratchet bar interaction;

Fig. 4 is the schematic diagram of the low tension switch that shows of Fig. 1;

Fig. 5 is the cutaway view of low tension switch under tripped condition, and wherein driving handle is in inactive position.

Fig. 6 is the cutaway view of low tension switch in the blending operation position, wherein is melted to together owing to the contact, thereby still in "on" position, and prevent that driving handle from moving to trip position;

Fig. 7 is the cutaway view of low tension switch under tripped condition, and wherein driving handle can freely be pulled trip position.

As shown in Figure 1, the current collector of low tension switch 1 is supported on the axle 2 of switch shaft 3 the axle dress.Switch shaft itself is supported on the central cassette, and this does not draw.Switch shaft 3 has planet axis relative on diameter 4 and 5, and when switch shaft 3 rotated around axle 2, they also rotated.Axle 4 is point of applications that toggle connects connecting rod 6, and its other end is connected to second toggle flexibly and connects on the connecting rod by toggle connecting axle 7, and wherein second toggle connects the shape that connecting rod forms triangular element 8.By axle 9, triangular element 8 is connected on the ratchet bar 10 on second angle flexibly, and ratchet bar 10 is used for the excessive current of release-push latch, and axle is supported on the fixing axle of arranging 11 with adorning.

Can sum up particularly in Fig. 2 and 3, triangular element 8 comprises the plate of two symmetries, parallel to each other stretching out, and between them, ratchet bar 10 is received and is supported on the connecting axle 9, and connecting axle 9 is connected with plate is fixed to one another.Zone at the 3rd angle of triangular element 8, plate connects by pin 12, wherein sells 12 and can contact ratchet bar 10, limits moving of triangular element 8.

As has already been mentioned above, each toggle connects connecting rod 6 owing to symmetry, is provided at the both sides of therebetween triangular element 8 and ratchet bar 10, and toggle connection connecting rod 6 is connected to each other by axle 7.The drive rod 13 of three-dimensional display partly in Fig. 2 comprises two plates, on plane separately, stretches out from two side plates 15 that drive box, and its bottom 13a that shows among Fig. 4, be supported in flexibly on the corresponding support part 14 that drives box side plate 15.In this embodiment, drive rod 13 comprises a veneer, bends on the coupling part in U type mode, and the bolt 16 and the driving handle 17 of coupling part are fixed, and wherein driving handle 17 is from driving the box protrusions.In each side of triangular element 8, a driving spring 18 is arranged in the toggle connecting bolt of conduct axle 7, and between the bolt 16 of drive rod 13.The bottom 13a of box side plate 15 and drive rod 13 also is arranged in the both sides of triangular element 8.

Releasing device is by reference number 9 indications in Fig. 1, and by this releasing device, control discharges ratchet bar 10 in known manner.

At the closing positions that Fig. 1 and 4 shows, driving handle 17 is positioned at the position that tilts to the left side, makes the dynamic effect line of spring 18 run to the left side of axle 9.At closing position, because spring force uses by triangular element 8 and axle 9, ratchet bar 10 is owing to cooperates with releasing device 19, and can not carry out anticlockwise moving up, so spring force becomes triangular element 8 around 9 moving clockwise.For this reason, as mentioned above, axle 7 is forced to intersect with the line of axle 9 connecting axles 4, if this causes ratchet bar 10 closures, on the closing direction of current collector 1, toggle connects connecting rod 6 and acts on switch shaft 3.

Fig. 5 has shown the operating position that discharges.After ratchet 10 was released device 19 releases, low tension switch arrived this operating position.At this operating position, driving handle 17 occupies the position that Fig. 5 shows.Owing to be applied on the axle 7 in this position spring power, triangular element 8 connects upwards pulling of connecting rod 6 with ratchet bar 10 and toggle, and wherein 10 of ratchet bars are contained on the triangular element 8, and this causes switch shaft 3 to rotate, and causes current collector 1 to separate like this.

The contact fusing may take place in operating process, and this may cause, the tensile force that can not only use owing to spring 18, and realize the separation of contact 1.Fig. 6 has shown the situation that such releasing device 19 closes a floodgate.If such situation takes place, can not determine from the position of driving handle 17 so whether the contact separates.In order only to pass through the mode of the position of driving handle 17, determine the practical operation situation of contact, the design of switch of the present invention has shown some characteristics, they will be explained in the back.

Can sum up from the demonstration of Fig. 1 and 4, securing rod 20 be arranged in the outside of one or two side plate 15 that drives box, an end axle of securing rod 20 is contained on the planet axis 5 of switch shaft 3, and other end axle is contained on the fixing pin 21.Pin 21 is fixed on the side plate 15, and by slotted hole 22 guiding, wherein slotted hole 22 is formed in the securing rod 20.In the end of securing rod 20 slotted holes one side, form projection 23, it can cooperate with receiving unit 24, and wherein receiving unit 24 is formed in the drive rod 13.Because this design, Fig. 7 has shown the driving handle 17 indicating contacts 1 absolute final trip position that separates, and this position is prevented from the mode of back.

At first, driving handle 17 moves in the clockwise direction, cooperates up to part 24 and 23.When attempting to be moved further driving handle 17 on this direction, the result impacts from driving handle 17, is applied directly on the securing rod 20 by drive rod 13, and the moment of torsion of Chan Shenging acts on the switch shaft 3 by axle 5 in the clockwise direction like this.Because axle is relative short distance between 2 and 5, this moment of torsion is very little, so in the contact 1, by the separation resistance that little fusing produces, can know on driving handle 17 that the face of land is revealed.Thus, any personnel that attempt cut-off switch can recognize at once, and driving handle 17 can not be pulled trip position at once.

If contact 1 is not melted to together, securing rod 20 occupies the position that Fig. 5 shows, makes driving handle 17 with drive rod 13, can freely move to the final trip position that Fig. 7 shows.By this way, the pin 25 that is applied on the driving handle 13 cooperates ratchet bar 10, pushes the latter in the clockwise direction downwards, occupies the stopper position of releasing device 19 up to ratchet bar 10.

Switch is combined with drive rod 13, drive rod 13 can be driven handle 17 and drive, and act on

toggle coupling part

6,7 and 8 by driving spring 18, at the switch shaft 3 that is used for contact-actuating 1 and be used to control between the ratchet bar 10 that discharges excessive current, the exercisable connection set up with 8 in described toggle coupling part 6,7.Switch also has securing rod 20, and it and drive rod 13 interact, and when 1 closure of contact, prevent that driving handle 17 from moving to trip position, wherein when 1 closure of contact, by the rotation of switch shaft 3, securing rod 20 can automatically be pulled the latched position that is relevant to drive rod.

Claims

1. switch comprises:

Drive rod (13), can be driven handle (17) drives, and act on the toggle coupling part (6,7 and 8) by driving spring (18), at the switch shaft that is used for contact-actuating (1) (3) and be used to control between the ratchet bar (10) that discharges excessive current, described toggle coupling part (6,7 and 8) set up exercisable be connected and

Securing rod (20), interact with described drive rod (13), and when described contact (1) is closed, prevent that driving handle (17) from moving to trip position, it is characterized in that moving by described switch shaft (3), impel described contact (1) closure, described securing rod (20) can automatically be pulled the latched position that is relevant to described drive rod (13).

2. according to the switch of claim 1, an end that it is characterized in that described securing rod (20), be attached to first attachment portion (5) of described switch shaft (3) movably, and it provides the other end of director element (22), be supported on the fixing bearing of arranging (21).

3. according to the switch of claim 2, it is characterized in that described bearing (21) forms guide finger, and described bearing (21) is fixed on the box side plate (15).

4. according to the switch of claim 2 or 3, it is characterized in that described toggle coupling part comprises that two toggles connect connecting rod (6,8), they are connected to each other by toggle connecting axle (7), and first toggle connects connecting rod (8) and is fixedly connected on the described ratchet bar (10), and described second toggle connects connecting rod (6) axle and is contained on second eccentric shaft (4), wherein second eccentric shaft (4) is arranged on the described switch shaft (3), and relative on diameter with described first eccentric shaft (5).

5. according to the switch of claim 4, it is characterized in that described first toggle connects connecting rod (8) and formed by two identical set squares, set square stretches out in parallel with each other, and connect by pin in the zone at least one angle, pin is as the toggle connecting axle (9) of described ratchet bar (10), and wherein said ratchet bar (10) is arranged between the plate.

6. according to the switch of claim 1, it is characterized in that described drive rod (13) forms by plate, plate stretches out on the plane identical with box side plate (15), described plate comprises opening portion (24), be used to receive the projection (23) of described securing rod (20), and be supported part (13a) support, at the opening portion (14) of described box side plate (15), support part (13a) to hide described driving handle (17).

7. according to the switch of claim 6 and one of claim 2 and 4, it is characterized in that near described box side plate (15) part the described driving handle (17) comprises projection (15a), the described drive rod of being supported on it (13) is in "on" position.