Contact system for isolating switch

Abstract

The invention belongs to the technical field of disconnecting switches, and relates to a contact system for a disconnecting switch, which comprises a moving contact and a static contact group, the static contact group comprises a supporting seat, a static contact arranged in the supporting seat, a static contact bridge electrically connected with the static contact, and an elastic telescopic piece; the static contact is a U-shaped elastic piece and comprises a pair of side plates which can be elastically drawn close to each other or separated from each other, the elastic telescopic piece is arranged between the side plates and the supporting seat, and the movable contact boss can be inserted between the side plates and abuts against the side plates through the elastic telescopic piece. Compared with the prior art, the U-shaped elastic piece capable of elastically clamping the moving contact is adopted as the static contact, the elastic telescopic piece is adopted to inwards abut against the two side plates from the two sides to generate inward clamping force, and the elastic deformation force of the static contact and the inward clamping force of the elastic telescopic piece provide contact pressure. And reliable contact between the static contact and the moving contact is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of isolating switches and relates to a contact system for isolating switches. Background Art

[0002] The isolating switch plays an isolating and protective role in the control circuit. This type of switch generally includes multiple stacked layers to control multiple current loops; at the same time, each layer includes a switch unit, which includes a rotating moving contact (multiple contacts) and multiple static contacts to improve the ability to break the current. In the existing isolating switch, the cooperation mode of the moving contact and the static contact is similar to the "knife switch" contact, that is, the contact area of ​​each static contact is an elastic opening, which is formed by the elastic sheet driving two spaced contact sheets. When closing the switch, the moving contact is inserted into the opening, and the elastic sheet drives the two contact sheets to clamp the moving contact. However, during use, the opening is loosened due to the frequent opening of the static contact, which affects the contact effect of the moving and static contacts. Summary of the invention

[0003] The object of the present invention is to provide a contact system for an isolating switch, which can improve the reliable contact effect between a stationary contact and a moving contact.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A contact system for an isolating switch, comprising

[0006] The moving contact is rotatable and has a moving contact boss on the rotating outer end;

[0007] The static contact group includes a support seat, a static contact arranged in the support seat, a static contact bridge electrically connected to the static contact, and an elastic telescopic member;

[0008] The static contact is a U-shaped elastic member, including a pair of side plates that can elastically move closer to or apart from each other, the elastic telescopic member is arranged between the side plates and the support seat, and the dynamic contact boss can be inserted between the side plates and abut against the side plates through the elastic telescopic member.

[0009] Furthermore, before the moving contact boss is inserted between the side plates, the distance between the side plates is smaller than the width of the moving contact boss.

[0010] Furthermore, the moving contact boss is trapezoidal, which facilitates the moving contact to be inserted into the middle of the static contact.

[0011] Furthermore, the elastic telescopic member is a spring.

[0012] Further, a positioning block is provided on the outer side of the side plate, a U-shaped groove is provided on the side wall of the support seat, an axis is provided between the side plate and the side wall of the support seat, one end of the axis is embedded in the U-shaped groove, and the other end is provided with a slot, and the positioning block is movably provided in the slot;

[0013] The spring is sleeved on the shaft.

[0014] Further, shaft sleeves are respectively sleeved on both ends of the shaft, and both ends of the spring respectively abut against the side plate and the side wall of the support seat through the corresponding shaft sleeves.

[0015] Further, an intermediate boss for separating the bottom of the side plate is arranged in the support seat.

[0016] Further, the static contact bridge includes an inner connecting cross plate, a connecting longitudinal plate, and an outer connecting cross plate that are connected in sequence. A threaded hole is provided on the inner connecting cross plate, a through hole is correspondingly provided at the bottom of the static contact, and the static contact and the static contact bridge are connected through the threaded hole and the through hole by a bolt.

[0017] Further, both sides at the bottom of the U-shaped elastic member expand outwards to form a groove-shaped structure for the inner connecting cross plate to penetrate into.

[0018] Further, bosses capable of interfering with the side walls of the groove-shaped structure are arranged on both sides of the inner connecting cross plate.

[0019] Further, moving contact bosses are respectively arranged at both ends of the moving contact. Correspondingly, two static contact groups are provided and are symmetric about the center of the moving contact.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) The present invention uses a U-shaped elastic member as the static contact. When the moving contact is inserted between the two side plates of the U-shaped elastic member, the two side plates expand outwards to generate an inward elastic restoring force. At the same time, an elastic telescopic member is used to press against the two side plates from both sides inward to generate an inward clamping force. The contact pressure is provided by the elastic deformation force of the static contact point and the inward clamping force of the elastic telescopic member, ensuring reliable contact between the static contact and the moving contact;

[0022] 2) The present invention uses an elastic telescopic member to press against the two side plates from both sides inward, and uses an intermediate boss to separate the two side plates of the U-shaped elastic member from the bottom, so that the moving contact is not easy to shake and a certain amount of vibration can be eliminated. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a contact system for a disconnector in the embodiment;

[0024] Figure 2 It is a schematic structural diagram of the moving contact;

[0025] Figure 3 It is a schematic structural diagram of the static contact group;

[0026] Figure 4 It is a schematic structural diagram of the static contact;

[0027] Figure 5 Structural schematic diagram of the support base;

[0028] Figure 6 Structural schematic diagram of the static contact bridge;

[0029] Figure 7 、 Figure 8 Structural schematic diagram of the contact system in the open - gate state;

[0030] Figure 9 Structural schematic diagram of the contact system in the closed - gate state;

[0031] Marking description in the figure:

[0032] 1 - static contact group, 11 - static contact bridge, 1101 - threaded hole, 12 - static contact, 1201 - through - hole, 1202 - positioning block, 13 - support base, 1301 - U - shaped groove, 1302 - middle boss, 14 - shaft, 15 - spring, 16 - bushing, 17 - screw, 2 - moving contact, 2101 - moving contact boss. Specific implementation mode

[0033] The present invention will be described in detail below with reference to the drawings and specific embodiments. The following embodiments are implemented on the premise of the above - mentioned technical solutions of the present invention, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0034] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] Some embodiments of the present invention will be described in detail below with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0036] Embodiment:

[0037] As Figure 1 shown, a contact system for a disconnector includes a rotatable moving contact 2 and a pair of static contact groups 1 that are centrally symmetrically arranged about the rotation axis of the moving contact 2. Among them, a moving contact boss 2101 is provided at the rotating outer end of the moving contact 2; the static contact group 1 includes a support base 13, a static contact 12 arranged in the support base 13, a static contact bridge 11 electrically connected to the static contact 12, and an elastic telescopic member; the static contact 12 is a U - shaped elastic member including a pair of side plates that can elastically approach or separate from each other, the elastic telescopic member is arranged between the side plates and the support base 13, and the moving contact boss 2101 can be inserted between the side plates during the closing process and abuts against the side plates through the elastic telescopic member.

[0038] In some preferred embodiments, before the moving contact boss 2101 is inserted between the side plates, the distance between the side plates is smaller than the width of the moving contact boss 2101, so that the side plates elastically expand outwards after the moving contact boss 2101 is inserted, generating an inward elastic restoring force, and using this elastic restoring force to tightly connect the side plates and the moving contact boss 2101.

[0039] In some preferred embodiments, the moving contact boss 2101 is trapezoidal to facilitate better insertion between the side plates.

[0040] In some preferred embodiments, the elastic telescopic member is a spring 15.

[0041] In some preferred embodiments, a positioning block 1202 is provided on the outer side of the side plate, U-shaped grooves 1301 are symmetrically provided on both side walls of the support seat 13, a shaft 14 is provided between the side plate and the side wall of the support seat 13, one end of the shaft 14 is embedded in the U-shaped groove 1301, and the other end is provided with a slot, and the positioning block 1202 is movably arranged in the slot; the spring 15 is sleeved on the shaft 14. Along the axial direction of the spring 15, a gap is provided between the positioning block 1202 and the bottom of the slot.

[0042] In some preferred embodiments, shaft sleeves 16 are respectively sleeved at both ends of the shaft 14, and both ends of the spring 15 are respectively abutted against the side plate and the side wall of the support seat 13 through the corresponding shaft sleeves 16 to prevent wear between the spring 15 and the side plate or the side wall of the support seat 13.

[0043] In some preferred embodiments, an intermediate boss 1302 for separating the bottom of the side plate is provided in the support seat 13 to fix the initial position of the static contact 12.

[0044] In some preferred embodiments, the static contact bridge 11 includes an inner connecting horizontal plate, a connecting vertical plate, and an outer connecting horizontal plate connected in sequence. A pair of threaded holes 1101 are symmetrically opened on the inner connecting horizontal plate, and a pair of through holes 1201 are correspondingly provided at the bottom of the static contact 12. The threaded holes 1101 of the static contact bridge 11 and the through holes 1201 on the static contact 12 are coaxially aligned, and the static contact 12 and the static contact bridge 11 are connected by screws 17 through the threaded holes 1101 and the through holes 1201.

[0045] In some preferred embodiments, both sides of the bottom of the U-shaped elastic member expand outwards to form a groove-shaped structure for the inner connecting horizontal plate to pass through, and the overall U-shaped elastic member is deformed in a "convex" shape. More preferably, convex platforms 1102 that can interfere with the side walls of the groove-shaped structure are symmetrically provided on both sides of the inner connecting horizontal plate, and the convex platforms 1102 play a limiting role to prevent the inner connecting horizontal plate from being inserted too deeply.

[0046] In some preferred embodiments, when the convex platform 1102 abuts against the side wall of the groove-shaped structure, the front side of the inner connecting horizontal plate is flush with the front side of the groove-shaped structure.

[0047] In some preferred embodiments, moving contact bosses 2101 are respectively provided at both ends of the moving contact 2 , and correspondingly, two stationary contact groups 1 are provided and are symmetrical about the center of the moving contact 2 .

[0048] Working principle:

[0049] Since the thickness of the moving contact 2 is greater than the distance between the two side plates at the bottom of the static contact 12, when the moving contact 2 is closed, the static contact 12 is elastically deformed by the force and is stretched open, and the distance changes from h0 to h, and h is greater than h0. The spring 15 is continuously applied to the static contact 12, and the force direction is inward, providing contact pressure, so that the moving and static contacts are in reliable contact and the circuit is flowing; when the moving contact is opened, the static contact returns to the starting position under the action of the spring pressure and its own deformation.

[0050] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A contact system for a disconnector, characterized in that, it includes a moving contact (2) that can rotate and is provided with a moving contact boss (2101) at the outer end of rotation; a static contact group (1), including a support seat (13), a static contact (12) arranged in the support seat (13), a static contact bridge (11) electrically connected to the static contact (12), and an elastic telescopic member; the static contact (12) is a U-shaped elastic member, including a pair of side plates that can elastically approach or separate from each other, the elastic telescopic member is arranged between the side plates and the support seat (13), and the moving contact boss (2101) can be inserted between the side plates and abuts against the side plates through the elastic telescopic member.

2. The contact system for a disconnector according to claim 1, characterized in that, before the moving contact boss (2101) is inserted between the side plates, the distance between the side plates is smaller than the width of the moving contact boss (2101).

3. The contact system for a disconnector according to claim 1, characterized in that, the moving contact boss (2101) is trapezoidal.

4. The contact system for a disconnector according to claim 1, characterized in that, the elastic telescopic member is a spring (15).

5. The contact system for a disconnector according to claim 4, characterized in that, a positioning block (1202) is arranged on the outer side of the side plate, a U-shaped groove (1301) is arranged on the side wall of the support seat (13), a shaft (14) is arranged between the side plate and the side wall of the support seat (13), one end of the shaft (14) is embedded in the U-shaped groove (1301), the other end is provided with a slot, and the positioning block (1202) is movably arranged in the slot; the spring (15) is sleeved on the shaft (14).

6. The contact system for a disconnector according to claim 1, characterized in that, an intermediate boss (1302) for separating the bottom of the side plate is arranged in the support seat (13).

7. The contact system for a disconnector according to claim 1, characterized in that, the static contact bridge (11) includes an inner connecting cross plate, a connecting longitudinal plate, and an outer connecting cross plate connected in sequence, a threaded hole (1101) is arranged on the inner connecting cross plate, a through hole (1201) is correspondingly arranged at the bottom of the static contact (12), and the static contact (12) and the static contact bridge (11) are connected through the threaded hole (1101) and the through hole (1201) by a screw (17).

8. The contact system for a disconnector according to claim 7, characterized in that, both sides of the bottom of the U-shaped elastic member expand outwards to form a groove-shaped structure for the inner connecting cross plate to pass through.

9. The contact system for a disconnector according to claim 8, characterized in that, bosses (1102) that can interfere with the side walls of the groove-shaped structure are arranged on both sides of the inner connecting cross plate.

10. The contact system for a disconnector according to claim 1, characterized in that, moving contact bosses (2101) are respectively arranged at both ends of the moving contact (2), correspondingly, two static contact groups (1) are provided and are centrosymmetric about the center of the moving contact (2).

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