Contact assembly of disconnecting switch

Abstract

According to the technical scheme, the contact assembly comprises an installation plate, a contact knife support, a static contact support and a contact knife, each static contact is provided with a cushion block with an inclined plane, each cushion block is provided with a buffer spring, each static contact support is provided with symmetrical static contacts, each static contact comprises a contact terminal, a support and a connecting rod, and each contact terminal is provided with an inclined plane. The contact terminal is fixedly connected to the static contact support, the support is fixedly connected to the static contact support, the support is movably connected with the connecting rod, the connecting rod is provided with a connecting rod protrusion extending and contacting with an inclined plane, the contact knife is provided with a cavity, the cavity is provided with a fastening device, and the static contact support is provided with a matched fastening base. Through the arrangement of the cushion block and the buffer spring, the impact on the contact knife is reduced, and the service life of the contact knife is prolonged. By arranging the linkable static contact, the static contact can clamp the contact knife to obtain reliable connection and is not easy to loosen.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, and more particularly to a contact assembly of an isolating switch. Background Art

[0002] Currently, disconnectors consist of a mounting plate, a contact blade support, a static contact support, and a contact blade. The contact blade support and static contact support are mounted on the mounting plate, and the contact blade is hinged to the contact blade support. The contact blade is the component that contacts when closed. Electrical contact between the contact blade and the static contact support completes the circuit. Disconnectors are widely used in various power supply and consumption systems in the national economy, including power plants, railways, mines, and oil fields.

[0003] However, there are still some defects in the above-mentioned existing technology. When the disconnector is closed, the contact knife will contact the static contact and produce a collision impact. The contact surface between the contact knife and the static contact is prone to mechanical fatigue and the contact is easy to loosen, resulting in poor contact. The contact knife will reduce its service life when it is impacted, and there is a possibility of breakage, posing a safety hazard. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a contact assembly for an isolating switch.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: it includes a mounting plate, a contact blade support, a static contact support and a contact blade, the static contact is provided with a pad with an inclined surface, the pad is provided with a buffer spring, the static contact support is provided with a symmetrical static contact, the static contact includes a contact terminal, a bracket, and a connecting rod, the contact terminal is fixedly connected to the static contact support, the bracket is fixedly connected to the static contact support, the bracket is movably connected to the connecting rod, one end of the connecting rod is close to the contact blade, and the other end is close to the contact terminal; the connecting rod has a connecting rod protrusion extending and contacting the inclined surface, the contact blade is provided with a cavity, the cavity is provided with a fastening device, and the static contact support is provided with a corresponding fastening base.

[0006] The utility model is further configured as follows: a return spring is provided at the movable connection between the bracket and the connecting rod.

[0007] The utility model is further configured as follows: both ends of the connecting rod are bent, and contact springs are provided at the bent positions.

[0008] The utility model is further configured as follows: the touch blade is composed of the same slotted touch blades.

[0009] The utility model is further configured as follows: the fastening device includes a locking plate and a reset spring; the locking plate is movably connected to the contact knife; and a reset spring is provided at the connection.

[0010] The utility model is further configured as follows: the locking plate is provided with a handle and a hook, and the hook is close to the fastening base.

[0011] In summary, the present invention has the following beneficial effects: The provision of a pad and buffer spring reduces the impact on the blade and contact when the switch is closed, thereby increasing service life. The combination of contact blades increases blade strength and service life. By providing a linked stationary contact, when the blade enters, the pad pushes the protrusion of the connecting rod, driving the connecting rod to connect the blade to the contact terminal, allowing the stationary contact to clamp the blade for a stable and reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of this embodiment;

[0013] Figure 2 This is a partial enlarged side sectional view of point A of this embodiment;

[0014] Figure numerals: 1. Mounting plate; 11. Contact blade support; 12. Static contact support; 121. Fastening base; 2. Contact blade; 21. Cavity; 22. Fastening device; 221. Locking plate; 2211. Handle; 2212. Hook; 23. Slotted contact blade; 3. Pad; 31. Buffer spring; 4. Static contact; 41. Contact terminal; 42. Bracket; 43. Connecting rod; 431. Connecting rod protrusion; 432. Contact spring. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings.

[0016] This embodiment discloses a contact assembly of an isolating switch, such as Figures 1 to 2As shown, it includes a mounting plate 1, a contact blade support 11, a static contact support 12 and a contact blade 2. The static contact 4 is provided with a pad 3 with an inclined surface. The pad 3 is provided with a buffer spring 31. The spring is provided so that the contact blade 2 is buffered when it is closed, reducing the impact on the contact blade 2 and increasing the service life of the contact blade 2. The static contact support 12 is provided with symmetrical static contacts 4. The symmetrically arranged static contacts 4 can increase the contact area and improve the electrical contact. The symmetrically arranged static contacts 4 can clamp the contact blade 2 so that the present invention obtains a stable and reliable connection state. The static contact 4 includes a contact terminal 41, a bracket 42, and a connecting rod 43. The contact terminal 41 is fixedly connected to the static contact support. The fixed connection is fixed using screws. The bracket 42 is fixedly connected to The stationary contact support is fixed with screws, and the bracket 42 is movably connected to the connecting rod 43. The movable connection is a hinged connection. One end of the connecting rod 43 is adjacent to the contact blade 2, and the other end is adjacent to the contact terminal 41. The connecting rod 43 has a connecting rod protrusion 431 that extends and contacts the inclined surface. When the pad 3 is subjected to force, it moves downward. The downward movement is transmitted to the connecting rod protrusion 431 on the inclined surface, causing the connecting rod protrusion 431 to move laterally. The connecting rod protrusion 431 pushes the connecting rod 43 laterally, so that one end of the connecting rod 43 contacts the terminal and the other end contacts the contact blade 2, thereby conducting the circuit. The contact blade 2 is provided with a cavity 21, which is equipped with a fastening device 22. The stationary contact support 12 is provided with a corresponding fastening base 121. The fastening device 22 cooperates with the fastening base 121 to fix the contact blade 2 and the stationary contact 4, making this novel device reliable and effective.

[0017] Further improvement, a reset spring is provided at the movable connection between the bracket 42 and the connecting rod 43. The connecting rod 43 is tightly contacted with the pad 3 under the elastic force of the reset spring, so that the connecting rod 43 and the contact terminal 41 are in an open circuit in the open state.

[0018] For further improvement, the connecting rod 43 is bent at both ends, and the bent connecting rod 43 can obtain a larger contact area and better electrical contact. A contact spring 432 is provided at the bending part, and the contact spring 432 can provide additional elasticity. When there is a certain gap or looseness at the two ends of the connecting rod 43, the contact spring 432 can compensate. At the same time, the contact spring 432 can provide stable contact pressure, which helps to maintain the stability of the contact resistance.

[0019] Furthermore, the stylus blade 2 is composed of identical slotted stylus blades 23. The slotted stylus blades 2 form a cavity 21, which is located in the center of the stylus blade 2. This ensures that the stylus blade 2 is subjected to balanced force when the fastening device 22 provided in the cavity 21 is fastened. This will reduce the service life of the stylus blade 2 due to twisting caused by one hand. The slotted stylus blades 23 are combined to form the stylus blade 2, giving the stylus blade 2 greater strength.

[0020] Further improvements are made to the fastening device 22, which includes a locking plate 221 and a return spring. The locking plate 221 is movably connected to the stylus 2, and a return spring is provided at the connection. The movable connection is a hinge connection, and the reset spring ensures that the force applied to the locking plate 221 is close to the fastening base 121, making the connection state of this novel design reliable and stable.

[0021] Further improvement, the locking plate 221 is provided with a handle 2211 and a hook 2212, and the hook 2212 is close to the fastening base 121. The setting of the hook 2212 makes the cooperation between the locking plate 221 and the fastening base 121 more stable and reliable, and the setting of the handle 2211 makes it more convenient to operate the new model by only hooking the handle 2211.

[0022] Working principle of the utility model

[0023] When closing the circuit breaker, a long rod is used to hook the new handle 2211, pushing the contact blade 2 into the static contact 4, so that the contact blade 2 contacts and pushes the pad 3. The movement of the pad 3 pushes the connecting rod protrusion 431, and the connecting rod protrusion 431 drives the connecting rod 43 so that the connecting rod 43 moves to contact the contact terminal 41 and the contact blade 2. The fastening device 22 on the contact blade 2 cooperates with the fastening base 121 to fix the closed state.

[0024] When opening the switch, the hook handle 2211 separates the fastening device 22 from the fastening base 121, and the contact knife 2 is pushed out under the action of the elastic force of the buffer spring 31. The static contact 4 is opened under the action of the return spring set in the connecting rod 43, and the contact knife 2 can be easily and conveniently disengaged from the contact.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A contact assembly of an isolating switch, comprising a mounting plate (1), a contact blade support (11), a stationary contact support (12) and a contact blade (2), characterized in that: The static contact (4) is provided with a pad (3) with an inclined surface, and the pad (3) is provided with a buffer spring (31). The static contact support (12) is provided with a symmetrical static contact (4), and the static contact (4) includes a contact terminal (41), a bracket (42), and a connecting rod (43). The contact terminal (41) is fixedly connected to the static contact support, and the bracket (42) is fixedly connected to the static contact support. The bracket is movably connected to the connecting rod (43), and one end of the connecting rod (43) is close to the contact blade (2), and the other end is close to the contact terminal (41); the connecting rod (43) has a connecting rod protrusion (431) extending and contacting the inclined surface, the contact blade (2) is provided with a cavity (21), and the cavity (21) is provided with a fastening device (22). The static contact support (12) is provided with a corresponding fastening base (121).

2. The contact assembly of the isolating switch according to claim 1, characterized in that: A return spring is provided at the movable connection between the bracket (42) and the connecting rod (43).

3. The contact assembly of the isolating switch according to claim 1, characterized in that: Both ends of the connecting rod (43) are bent, and contact springs (432) are provided at the bent portions.

4. The contact assembly of the isolating switch according to claim 1, characterized in that: The contact blade (2) is composed of identical slotted contact blades (23).

5. The contact assembly of the isolating switch according to claim 1, characterized in that: The fastening device (22) comprises a locking plate (221) and a return spring. The locking plate (221) is movably connected to the touch knife (2), and a return spring is provided at the connection.

6. The contact assembly of the isolating switch according to claim 5, characterized in that: The locking plate (221) is provided with a handle (2211) and a hook (2212), and the hook (2212) is close to the fastening base (121).

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