Contact device of isolating switch

Abstract

The utility model relates to a contact device of an isolating switch, which comprises a shell, a moving contact assembly and a static contact, a support plate is arranged in the moving contact assembly to support the moving contact, so that a static contact plate thickness gap larger than the static contact is formed in the moving contact assembly, the resistance when the moving contact reaches two sides of the static contact plate of the static contact is reduced, and the static contact plate thickness is reduced. Meanwhile, a stopping block and a press-in block are arranged in the shell, the stopping block pushes the supporting plate out of the moving contact at the closing position and enables the moving contact to clamp the static contact, the press-in block presses the pushed-out supporting plate back into the moving contact at the breaking position, the contact speed of the moving contact and the static contact is reduced, and the reliability of electric connection is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of components of disconnecting switch, especially a kind of contact device of disconnecting switch. BACKGROUND

[0002] Disconnecting switch is a kind of switch equipment in circuit play isolating role.Disconnecting switch contact device is composed of moving contact and static contact, moving contact is arranged between static contact and rotates, respectively with the static contact of two ends and breaks, moving contact and static contact close, when, the clamping portion of intermediate containing gap is formed on moving contact, static contact is clamped in the middle between the two sides of clamping portion, in order to guarantee the compactness of contact, the gap width between the two sides of clamping portion of moving contact when breaking is less than the thickness of static contact, therefore, static contact cannot be inserted into moving contact quickly, affect the reliability of closure, and static contact is easily burnt out. SUMMARY

[0003] In view of the above shortcomings, the utility model provides a kind of contact device of disconnecting switch, which can open moving contact when not closed.

[0004] In order to realize the above purpose, the utility model adopts a kind of contact device of disconnecting switch, including shell, moving contact assembly, static contact, two static contacts are respectively arranged at both ends in the inside of shell, moving contact assembly is arranged in the middle of shell and rotates, moving contact assembly is switched between the breaking position of separation with static contact and the closed position of contact with static contact, the moving contact assembly includes rotating shaft and the moving contact of being placed in rotating shaft, moving contact sleeve, spring sheet and support plate, moving contact is arranged at the inside of moving contact sleeve, two support plates are respectively arranged at both ends of the inside of moving contact, the inside of support plate is hinged on moving contact, spring sheet is arranged at the outside of moving contact sleeve, the two ends of spring sheet are pressed on moving contact sleeve towards the inside, the middle part of spring sheet is outwardly convex, the outside of the middle part of spring sheet is provided with the U-shaped buckle that spring sheet is pressed on the outside of moving contact sleeve, the inside of shell is formed with blocking block at the inside of static contact, support plate is formed with the support point that protrudes to both sides, support plate extends to the side of blocking block and forms push part, when moving contact assembly moves to closed position, push part contacts blocking block and hinders support plate rotating with moving contact, let support plate reverse rotation and make support point move to the outside of moving contact, the inside of shell is provided with pressure block outside breaking position of moving contact assembly, pressure block contacts the outside of support plate when moving contact moves to breaking position and press support plate to the inside of moving contact, support point on support plate supports moving contact and opens outwards against the pressure of spring sheet.

[0005] In particular, the rear of the pressure block forms an arc-shaped contact outer wall, and the moving contact assembly is arranged in the cavity surrounded by the contact outer wall.

[0006] Particularly, the side wall of the rotating shaft is formed with a partition block protruding outward and separating the two movable contactors, and the outer side of the partition block is close to the outer wall of the contactor.

[0007] Particularly, the stationary contactors are arranged on the same horizontal line, the inner end of the stationary contactors is inclined to one side, and the stationary contact plate is formed towards the other side, and the stationary contact plate is in contact with the movable contactor of the movable contactor assembly in the closed position.

[0008] Particularly, the outer side of the movable contactor assembly and the stationary contactor is provided with a plurality of arc extinguishing grid plates.

[0009] The beneficial effects of the utility model are that the support plate is arranged in the movable contactor assembly to support the movable contactors, so that a gap larger than the thickness of the stationary contact plate of the stationary contactor is formed in the movable contactor assembly, the resistance when the movable contactors reach both sides of the stationary contact plate of the stationary contactor is reduced, the blocking block and the pressing block are arranged in the shell, the support plate is pushed out of the movable contactors by the blocking block in the closed position, the movable contactors clamp the stationary contactors, the support plate pushed out is pressed back into the movable contactors by the pressing block in the breaking position, the contact speed of the movable contactors and the stationary contactors is reduced, and the reliability of the electrical connection is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is the schematic diagram of the specific embodiment of the utility model.

[0011] Fig. 2 is the exploded view of the specific embodiment of the utility model.

[0012] Fig. 3 is the schematic diagram of the specific embodiment of the utility model without one side shell.

[0013] Fig. 4 is the sectional view of the specific embodiment of the utility model.

[0014] Fig. 5 is the exploded view of the movable contactor assembly in the specific embodiment of the utility model.

[0015] Fig. 6 is the schematic diagram of the movable contactor assembly in the specific embodiment of the utility model. DETAILED DESCRIPTION

[0016] As Figs. 1-6As shown in the specific embodiment of the utility model, the contact device of the isolating switch comprises a shell 1, a moving contact assembly 2, and static contacts 3. Two static contacts 3 are respectively arranged at the two ends inside the shell 1. The moving contact assembly 2 is arranged at the middle part inside the shell 1 and rotates. The moving contact assembly 2 is switched between a breaking position, in which the moving contact assembly 2 is separated from the static contacts 3, and a closed position, in which the moving contact assembly 2 is in contact with the static contacts 3. The outer sides of the moving contact assembly 2 and the static contacts 3 are provided with multiple arc extinguishing grid pieces 4. The moving contact assembly 2 comprises a rotating shaft 21, a moving contact 22, a moving contact sleeve 23, spring pieces 24, and support plates 25. The moving contact 22 is arranged at the inner side of the moving contact sleeve 23. Two support plates 25 are respectively arranged at the two ends of the inner side of the moving contact 22. The inner side of the support plate 25 is hinged to the moving contact 22. The spring pieces 24 are arranged at the outer side of the moving contact sleeve 23. The two ends of the spring pieces 24 are pressed against the moving contact sleeve 23 towards the inner side. The middle part of the spring pieces 24 protrudes outward. The middle part of the spring pieces 24 forms a buckle groove. The outer side of the middle part of the spring pieces 24 is provided with a U-shaped buckle 26, which presses the spring pieces 24 against the moving contact sleeve 23. The two ends of the U-shaped buckle 26 are respectively arranged in the buckle grooves of the two spring pieces 24. A blocking block 11 is formed at the inner side of the static contacts 3 inside the shell 1. A support point 251 protruding to both sides is formed on the support plate 25. The support plate 25 extends to the side of the blocking block 11 to form a pushing part 252. When the moving contact assembly 2 moves to the closed position, the pushing part 252 contacts the blocking block 11 to hinder the support plate 25 from rotating with the moving contact 22, so that the support plate 25 reversely rotates to move the support point 251 to the outside of the moving contact 22. A pressing block 12 is arranged at the outer side of the breaking position of the moving contact assembly 2 inside the shell 1. When the moving contact 22 moves to the breaking position, the pressing block 12 contacts the outer side of the support plate 25 to press the support plate 25 into the moving contact 22. The support point 251 on the support plate 25 supports the moving contact 22 to overcome the pressure of the spring pieces 24 and expand outward.

[0017] An arc-shaped contact outer wall 13 is formed in the shell behind the pressing block 12. The moving contact assembly 2 is arranged in the cavity surrounded by the contact outer wall 13. A partition block 211 protruding outward is formed on the side wall of the rotating shaft 21 to separate the two moving contacts 22. The outer side of the partition block 211 is close to the contact outer wall 13.

[0018] The two static contacts 3 are arranged on the same horizontal line. The inner end of the static contact 3 is inclined to one side and forms a static contact plate 31 towards the other side. The static contact plate 31 is in contact with the moving contact 22 of the moving contact assembly 2 at the closed position.

[0019] The preferred embodiment of the utility model in the above specific embodiment, other obvious changes or combinations are also within the protection scope of the claims.

Claims

1. A contact device of a disconnector, comprising a housing, a moving contact assembly, static contacts, two static contacts are respectively arranged at both ends inside the housing, the moving contact assembly is arranged in the middle of the housing and rotates, the moving contact assembly switches between a breaking position separated from the static contacts and a closed position in contact with the static contacts, characterized in that: The moving contact assembly comprises a rotating shaft, a moving contact, a moving contact sleeve, spring sheets and support plates, the moving contact is arranged inside the moving contact sleeve, two support plates are arranged at the two ends of the moving contact respectively, the inner side of the support plate is hinged to the moving contact, the spring sheets are arranged outside the moving contact sleeve, the two ends of the spring sheets are pressed against the moving contact sleeve, the middle part of the spring sheets protrudes outward, the outer side of the middle part of the spring sheets is provided with a U-shaped buckle for pressing the spring sheets against the moving contact sleeve, a blocking block is formed inside the shell at the inner side of the static contact, support points protruding to both sides are formed on the support plates, the support plates extend to the side of the blocking block to form a pushing part, when the moving contact assembly moves to the closed position, the pushing part contacts the blocking block to hinder the support plates from rotating with the moving contact, the support plates are reversely rotated to move the support points outside the moving contact, a pressing block is arranged inside the shell at the outside of the breaking position of the moving contact assembly, the pressing block contacts the outer side of the support plates to press the support plates into the moving contact when the moving contact moves to the breaking position, the support points on the support plates support the moving contact to overcome the pressure of the spring sheets and expand outward.

2. The contact arrangement of a disconnector according to claim 1, characterized in that An arc-shaped contact outer wall is formed behind the pressing block, and the moving contact assembly is arranged in a cavity surrounded by the contact outer wall.

3. The contact arrangement of a disconnector according to claim 2, characterized in that A partition block protruding outward is formed on the side wall of the rotating shaft to separate the two ends of the moving contact, and the outer side of the partition block is close to the contact outer wall.

4. Contact arrangement of a disconnector according to claim 1 or 2 or 3, characterized in that: The static contacts are arranged on the same horizontal line, the inner end of the static contact is inclined to one side, and a static contact plate is formed toward the other side, and the static contact plate contacts the moving contact of the moving contact assembly at the closed position.

5. Contact arrangement of a disconnector according to claim 1 or 2 or 3, characterized in that: A plurality of arc-extinguishing grid sheets are arranged on the outer sides of the moving contact assembly and the static contacts.

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