A kind of isolating switch
Technical field
The utility model relates to the low-voltage circuit terminal appliance, a kind of specifically isolating switch.
Background technology
Existing isolating switch is when closing by hand, and the moving contact closing speed depends on the handle velocity of rotation.The pressure of moving contact is to start from scratch gradually to increase, and this can cause and draw electric arc, thereby influence the useful life of contact.And existing isolator operating mechanism complexity, product cost is higher, and reliability is low.
The utility model content
At the defective that exists in the prior art, the purpose of this utility model is to provide a kind of isolating switch, and is simple in structure, modern design, and operating handle is light, the reliability height.
For reaching above purpose, the technical scheme that the utility model is taked is:
A kind of isolating switch comprises by base 3 and lid 12 shells of forming, fixed contact system 2, moving contact system 1 and break-make indicating mechanism, it is characterized in that:
Handle 9 places in the corresponding circle hole on base 3 tops, and a pin of handle torsion spring 11 is inserted in the circular hole A44 on the base 3, and the another pin is inserted in the circular hole B45 on the handle 9;
Place the fixed contact system 2 of the left end of base 3 to comprise left wire frame 142, left terminal block 15 and fixed contact 16, fixed contact 16 is fixed on left terminal block 15 right-hand members, the left end of left side terminal block 15 is inserted in the left wire frame 142 that places base 3 left sides, and screw 141 is screwed in the left wire frame 142 after passing circular hole on the left terminal block 15;
Moving contact system 1 comprises gusset piece 19, moving contact 20 and moving contact rack 18, moving contact 20 is fastening by gusset piece 19 and moving contact rack 18, gusset piece 19 17 is connected with right terminal block 21 left ends by being flexible coupling, the right-hand member of right terminal block 21 is inserted in the right wire frame 143 that places base 3 right sides, screw 141 is screwed in the right wire frame 143 after passing circular hole on the right terminal block 21,22 straddle mountings of moving contact torsion spring are between the sliding tray 54 of moving contact rack 18 both sides, and moving contact fixed axis 5 passes in the circular hole D47 that is inserted into behind the circular hole C42 of moving contact rack 18 right-hand members on the base 3;
After one end of U-shaped connecting rod 8 passes the sliding tray 54 and the circular hole E41 on the moving contact torsion spring 22 of moving contact rack 18 both sides successively, be inserted in the gathering sill 53 of base 3, the other end is inserted among the circular hole F46 on the handle 9, and gathering sill 53 is arranged on 20 of fixed contact 16 and moving contacts;
Break-make indicating mechanism comprises indication piece 13, indication linkage bar 7 and indication piece fixed axis 6, indication piece 13 is inserted in the circular hole G48 on the base 3 by indication piece fixed axis 6, one end of indication piece trace 7 hangs in the circular hole H43 on the moving contact rack 18, and the other end places sliding tray 52 on the indication piece 13 and the gathering sill 51 on the base 3 successively.
On the basis of technique scheme, the left side of the right side of left wire frame 142 and right wire frame 143 is provided with the spring leaf 10 of its state that moves up and down of qualification, is provided with the groove to 10 position-limiting actions of spring leaf on base 3.
On the basis of technique scheme, the lower-left end of base 3 is provided with buckle 4, and lid 12 is adaptive with base 3.
Isolating switch described in the utility model, simple in structure, modern design, operating handle is light, the reliability height.
Description of drawings
The utility model has following accompanying drawing:
The structural representation of Fig. 1 isolating switch base
The structural representation of Fig. 2 isolating switch lid
The structural representation of Fig. 3 fixed contact system
The structural representation of Fig. 4 moving contact system
The structural representation of Fig. 5 break-make indicating mechanism
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
The utility model discloses a kind of isolating switch, comprise the shell, fixed contact system, moving contact system and the break-make indicating mechanism that are made up of base and lid, handle places in the corresponding circle hole on base top, and the handle torsion spring is arranged between base and the handle; The fixed contact system places the left end of base; The moving contact system places the right-hand member of base, and the U-shaped connecting rod connects moving contact rack and handle and an end and is arranged in the gathering sill on the base; Break-make indicating mechanism comprises indication piece, indication linkage bar and indication piece fixed axis, indication piece is inserted in the circular hole G on the base by the indication piece fixed axis, one end of indication piece trace hangs in the circular hole H on the moving contact rack, and the other end places sliding tray on the indication piece and the gathering sill on the base successively.Specifically, Fig. 1 is the structural representation of isolating switch base described in the utility model, comprise the shell, fixed contact system 2, moving contact system 1 and the break-make indicating mechanism that form by base 3 and lid 12 (referring to Fig. 2), as shown in Figure 1, handle 9 places in the corresponding circle hole on base 3 tops, a pin of handle torsion spring 11 is inserted in the circular hole A44 on the base 3, and the another pin is inserted in the circular hole B45 on the handle 9;
As shown in Figure 3, place the fixed contact system 2 of the left end of base 3 to comprise left wire frame 142, left terminal block 15 and fixed contact 16, fixed contact 16 is fixed on left terminal block 15 right-hand members, the left end of left side terminal block 15 is inserted in the left wire frame 142 that places base 3 left sides, and screw 141 is screwed in the left wire frame 142 after passing circular hole on the left terminal block 15;
As shown in Figure 4, moving contact system 1 comprises gusset piece 19, moving contact 20 and moving contact rack 18, moving contact 20 is fastening by gusset piece 19 and moving contact rack 18, gusset piece 19 17 is connected with right terminal block 21 left ends by being flexible coupling, the right-hand member of right terminal block 21 is inserted in the right wire frame 143 that places base 3 right sides, screw 141 is screwed in the right wire frame 143 after passing circular hole on the right terminal block 21,22 straddle mountings of moving contact torsion spring are between the sliding tray 54 of moving contact rack 18 both sides, and moving contact fixed axis 5 passes in the circular hole D47 that is inserted into behind the circular hole C42 of moving contact rack 18 right-hand members on the base 3;
As shown in Figure 1, after one end of U-shaped connecting rod 8 passes the sliding tray 54 and the circular hole E41 on the moving contact torsion spring 22 of moving contact rack 18 both sides successively, be inserted in the gathering sill 53 of base 3, the other end is inserted among the circular hole F46 on the handle 9, and gathering sill 53 is arranged on 20 of fixed contact 16 and moving contacts;
As shown in Figure 5, break-make indicating mechanism comprises indication piece 13, indication linkage bar 7 and indication piece fixed axis 6, indication piece 13 is inserted in the circular hole G48 on the base 3 by indication piece fixed axis 6, one end of indication piece trace 7 hangs in the circular hole H43 on the moving contact rack 18, and the other end places sliding tray 52 on the indication piece 13 and the gathering sill 51 on the base 3 successively.
On the basis of technique scheme, as shown in Figure 1, the left side of the right side of left wire frame 142 and right wire frame 143 is provided with the spring leaf 10 of its state that moves up and down of qualification, is provided with the groove to 10 position-limiting actions of spring leaf on base 3.
On the basis of technique scheme, as shown in Figure 1, the lower-left end of base 3 is provided with buckle 4, and lid 12 is adaptive with base 3.Lid 12 and base 3 are snapped together by buckle 4, constitute the shell of isolating switch.
Isolating switch operation principle described in the utility model is as follows:
When clockwise direction rotatablely moves under the effect of handle 9 in external force, the moment of handle torsion spring 11 strengthens gradually and drives 8 motions of U-shaped connecting rod simultaneously, then cause that U-shaped connecting rod 8 drives 22 motions of moving contact torsion spring, and because 22 straddle mountings of moving contact torsion spring are in the both sides of moving contact rack 18, so when 22 motions of moving contact torsion spring, the moment of torsion that acts on moving contact rack 18 both sides makes moving contact rack 18 do counterclockwise to rotatablely move around its moving contact fixed axis 5.Fastening because of moving contact 20, gusset piece 19 and moving contact rack 18 threes again, so when moving contact rack 18 motions, moving contact 20 also its moving contact fixed axis 5 is done counterclockwise to rotatablely move and is close with fixed contact 16.On the other hand, in the time of moving contact rack 18 motions, also driven indication piece 13 and done counterclockwise to rotatablely move around its indication piece fixed axis 6 by indication piece trace 7.
When the continuation clockwise direction rotatablely moves certain angle under the effect of handle 9 in external force, handle button spring 11 acts on moment on the handle 9 acts on the moment on the handle 9 greater than external force moment, even under the effect that does not have external force, handle 9 also can continue to rotatablely move as clockwise direction fast under the effect of handle button spring 11, and the effect by the U-shaped connecting rod makes dynamic and static contact closed fast then.Indication piece shows closure state at this moment.
When counterclockwise rotatablely moving under the effect of handle 9 in external force, the moment of handle torsion spring 11 strengthens again gradually, because the effect of moving contact torsion spring 22, dynamic and static contact is kept closed, when handle 9 continued counterclockwise to rotatablely move certain angle, even without the external force effect, handle 9 was under the effect of handle torsion spring 11 and moving contact torsion spring 22 moments, also can continue to do fast counterclockwise to rotatablely move, and dynamic and static contact be separated fast by the effect of U-shaped connecting rod 8.Indication piece shows off-state at this moment.