CN111681906B

CN111681906B - Vacuum circuit breaker

Info

Publication number: CN111681906B
Application number: CN202010175067.4A
Authority: CN
Inventors: 向国庆; 刘忠; 陈武奇
Original assignee: ANDELI GROUP CO LTD
Current assignee: ANDELI GROUP CO LTD
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2022-06-17
Anticipated expiration: 2040-03-13
Also published as: CN111681906A

Abstract

The invention discloses a vacuum circuit breaker, which comprises a shell, wherein the bottom of the shell is slidably connected with a self-locking push rod, the self-locking push rod is rotatably connected with a push plate, a rotating plate rotating around the end part is sleeved on the outer side of one end of the push plate, a clamping block is arranged in the shell, and the clamping block is clamped with the self-locking push rod.

Description

Vacuum circuit breaker

Technical Field

The invention relates to the technical field of vacuum circuit breakers, in particular to a vacuum circuit breaker.

Background

The existing vacuum circuit breaker generally comprises a fixed contact and a moving contact, the moving contact is provided with a driving arm which drives the moving contact to move up and down to realize the switching-on and switching-off operation, the driving plate is generally arranged perpendicular to an insulating pull rod, the existing structure is adopted, power needs to be transmitted between two perpendicular components, and large stress concentration is inevitably caused at the intersection point of the two components, so that the parts are required to be overhauled and replaced in practice, the working time is delayed, and the waste of capital cost is caused.

In order to solve the above problems, a vacuum circuit breaker disclosed in the prior patent publication No. CN103700538B includes a housing and a vacuum arc-extinguishing chamber, wherein a conductive plate is provided at an upper end of the vacuum arc-extinguishing chamber, a moving contact at a lower end of the vacuum arc-extinguishing chamber is connected to a push rod, a drive plate is provided at a lower portion of the push rod, one end of the drive plate is mounted on a pivot, an upper groove is provided at an upper end of the drive plate, a wear-resistant block is provided in the upper groove, a center hole is provided at a center of the wear-resistant block, a compression spring is pressed between the drive plate and a step at a middle portion of the push rod, and a rear end of the compression spring is pressed on a front end face of the wear-resistant block; the latter half of drive plate is provided with the arc wall, and the hole is worn to the push rod rear end, and stop nut is installed to the push rod end, and stop nut's profile shape suits with arc wall profile shape, and stop nut's area is less than the area of arc wall and makes stop nut be located the arc wall. After adopting such structure, thoroughly changed traditional drive plate and the push rod between the complete rigidity vertical connection bring stress concentration, reduced wearing and tearing effectively, but this structure has the following problem: the push rod and the drive plate need to rotate, the drive plate also rotates around a point, but the drive plate is convenient to rotate through a groove with the diameter larger than that of the push rod, the rotating angle of the mode is limited to an included angle between a connecting line of the circle center of the bottom and the edge of the top and the axis of the groove, the included angle is small, so that the distance of the drive plate moving upwards on the push rod is small, and the distance can be offset by the stroke of the spring, and the push rod cannot be pushed; secondly, this push rod needs to set up extra stop device to in pushing up to be restricted, it is more loaded down with trivial details. To this end, we propose vacuum interrupters.

Disclosure of Invention

The invention aims to provide a vacuum circuit breaker which can effectively avoid stress concentration and does not need to be additionally provided with limit, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: vacuum circuit breaker, including the casing, the bottom sliding connection of casing has the auto-lock push rod, it is connected with the push pedal to rotate on the auto-lock push rod, the rotor plate around tip pivoted has been cup jointed in the one end outside of push pedal, be provided with the fixture block in the casing, fixture block and auto-lock push rod joint.

Preferably, the auto-lock push rod includes the connecting rod, sliding connection has the sliding sleeve on the connecting rod, the lateral wall of sliding sleeve is provided with the pivot, the pivot is rotated with the push pedal and is connected, the upper and lower both ends of sliding sleeve all are connected with first spring, just the other end of first spring be provided with connecting rod fixed connection's fixed block, be provided with the promotion piece that promotes the fixture block in the connecting rod, the sliding connection of sliding sleeve can shift up when rotating, is convenient for promote, and the spring time of connecting rod can effectually be shortened to two sets of first springs.

Preferably, a pull rod is connected in the connecting rod in a sliding mode, the top of the pull rod is connected with a pushing block, the pushing block is connected with the clamping block in a sliding mode, a first baffle is arranged at the bottom of the pull rod, the first baffle is connected with a first through groove formed in the connecting rod in a sliding mode, a limiting groove connected with the first baffle in a sliding mode is formed in the inner side of the sliding sleeve, the clamping block can be pushed out through the pull rod, and therefore limiting is convenient to relieve.

Preferably, the connecting rod is provided with a second through groove, the pushing block is connected with a second baffle which is connected with the second through groove in a sliding manner, the second baffle extends into the shell and is connected with a second spring between the second baffle and the shell, and the second spring is convenient for the second baffle to reset, so that the pushing block is pushed to reset.

Preferably, a third spring is arranged between the clamping block and the shell, so that the clamping block can be conveniently and automatically pushed out to be automatically locked.

Preferably, be provided with waist type hole on the push pedal, waist type hole is connected with the pivot rotation, and the waist type hole is convenient for the rotation unrestricted of sliding sleeve to be convenient for promote.

Preferably, the top of the clamping block is provided with a first guide sliding surface, the connecting rod is provided with a clamping groove clamped with the clamping block, the top of the clamping groove is provided with a second guide sliding surface matched with the first guide sliding surface, and the two sets of guide sliding surfaces are arranged to facilitate the generation of lateral component force by the second guide sliding surface and the first guide sliding surface after the clamping block is pushed out by the pushing block, so that the clamping block is completely pushed out of the connecting rod.

Preferably, the top of the clamping groove is lower than the lowest point of the bottom of the second through groove, and the top of the clamping groove and the lowest point of the bottom of the second through groove are not at the same height, so that the strength is prevented from being weakened.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, through the sliding connection of the rotating plate and the push plate, the rotating connection of the sliding sleeve and the push plate and the sliding connection of the sliding sleeve and the connecting rod, the vertical rigid connection is changed into movable connection, so that stress concentration is effectively avoided, the push plate cannot be pushed due to constraint, and self-locking when pushed up can be realized under the action of the connecting rod and the clamping block, and automatic unlocking when pulled down is more convenient and simpler.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a half-section structure of a rotating plate;

FIG. 3 is a schematic view of a half-section structure of the connecting rod;

FIG. 4 is an enlarged view of the structure of the area A in FIG. 3;

FIG. 5 is a schematic view of a half-section structure of the connecting rod in another orientation;

FIG. 6 is an enlarged view of the structure of the area B in FIG. 5;

FIG. 7 is an enlarged view of the structure of the area C in FIG. 5;

FIG. 8 is a partial schematic view of the connecting rod;

fig. 9 is a sectional view showing a state where the latch is pushed out.

In the figure: 1-a shell; 2-a self-locking push rod; 3-pushing the plate; 4-rotating the plate; 5-clamping blocks; 6-connecting rod; 7-a sliding sleeve; 8-a rotating shaft; 9-a first spring; 10-fixing blocks; 11-a push block; 12-a pull rod; 13-a first baffle; 14-a first through slot; 15-a limiting groove; 16-a second through slot; 17-a second baffle; 18-a second spring; 19-a third spring; 20-kidney shaped holes; 21-a first leading slide surface; 22-a card slot; 23-second slide guiding surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: the vacuum circuit breaker comprises a shell 1, wherein the shell 1 is internally connected with a static contact through a moving contact, the moving contact and the static contact are both positioned in a vacuum chamber, the bottom of the shell 1 is slidably connected with a self-locking push rod 2, the moving contact is driven by the self-locking push rod 2 to realize connection and disconnection with the static contact, the self-locking push rod 2 is rotatably connected with a push plate 3, a rotating plate 4 rotating around the end part is sleeved on the outer side of one end of the push plate 3, a fixture block 5 is arranged in the shell 1, the fixture block 5 is connected with the self-locking push rod 2 in a clamping mode, and the rotating plate 4 rotates around the end part, so that the position of the joint of the self-locking push rod 2 is kept not to move left and right through the sliding of the push plate 3 on the rotating plate 4, and the push plate cannot be pushed to move up the self-locking push rod.

The self-locking push rod 2 comprises a connecting rod 6, a sliding sleeve 7 is connected to the connecting rod 6 in a sliding mode, a rotating shaft 8 is arranged on the outer side wall of the sliding sleeve 7, the rotating shaft 8 is rotatably connected with a push plate 3, the sliding sleeve 7 rotates on the push plate 3 through the rotating shaft 8, the sliding sleeve 7 slides up and down on the connecting rod 6 and is matched with the movement of the push plate 3 on a rotating plate, so that the connecting rod 6 can move upwards when the push plate 3 is pushed, one end, away from the rotating point of the push plate 3, of the push plate 3 is longer, a longer force arm is formed, the pushing force is reduced, the pushing force is easier, the upper end and the lower end of the sliding sleeve 7 are both connected with first springs 9, the other end of each first spring 9 is provided with a fixing block 10 fixedly connected with the connecting rod 6, a pushing block 11 for pushing a fixture block 5 is arranged in the connecting rod 6, and two sets of first springs 9 can be in rigid contact with an elastic connection answer, can less wearing and tearing, and all set up first spring 9 from top to bottom and not with fixed block 10 fixed connection, can reduce the bounce time at spring compression or tensile recovery to shorten the bounce time of moving contact, during the pulldown, can compress the spring of sliding sleeve 7 bottom earlier, consequently the first spring 9 of bottom has certain resilience when loosening, can drive sliding sleeve 7 round trip movement and can not influence connecting rod 6 or influence very little.

The connecting rod 6 is connected with a pull rod 12 in a sliding manner, the top of the pull rod 12 is connected with a pushing block 11, the pushing block 11 is connected with a clamping block 5 in a sliding manner, the top of the clamping block 5 is provided with a first sliding guide surface 21, the connecting rod 6 is provided with a clamping groove 22 clamped with the clamping block 5, a third spring 19 is arranged between the clamping block 5 and the shell 1, the clamping block 5 can extend into the clamping groove 22 under the pushing action of the third spring 19 so as to limit and keep stable the connecting rod 6, the top of the clamping groove 22 is provided with a second sliding guide surface 23 matched with the first sliding guide surface 21, when the connecting rod 6 is pulled down, the pushing block 11 can contact and slide with the first sliding guide surface 21 on the clamping block 5 so as to generate lateral component force, the clamping block 5 is pushed outwards, and then moves to a certain distance, the first sliding guide surface 21 can contact with the second sliding guide surface 23, and the connecting rod 6 can move downwards, the second guide sliding surface 23 on the clamping groove 22 slides with the first guide sliding surface 21 and generates a lateral component force to enable the clamping block 5 to exit from the clamping groove 22, the third spring 19 facilitates the clamping block to automatically extend into the clamping groove 22 so as to be automatically limited, the bottom of the pull rod 12 is provided with the first baffle 13, the first baffle 13 is in sliding connection with the first through groove 14 formed in the connecting rod 6, the inner side of the sliding sleeve 7 is provided with the limiting groove 15 in sliding connection with the first baffle 13, the first baffle 13 facilitates driving the pull rod 12 to move downwards, so that the pushing block 11 is in contact with the clamping block 5, the upper surface of the limiting groove 15 limits and drives the first baffle 13, and the first through groove 14 is convenient for movable connection and cannot generate synchronous movement.

The connecting rod 6 is provided with a second through groove 16, the pushing block 11 is connected with a second baffle 17 which is connected with the second through groove 16 in a sliding manner, the second baffle 17 extends into the shell 1 and is connected with a second spring 18 between the second baffle 17 and the shell 1, and the second baffle 17 pushes the pushing block 12 and the pull rod 11 upwards to reset under the action of the second spring 18 after the contact is limited, so that the next releasing is limited.

The push plate 3 is provided with a waist-shaped hole 20, the waist-shaped hole 20 is rotatably connected with the rotating shaft 8, and the waist-shaped hole 20 facilitates the rotation of the sliding sleeve without limitation, so that the push plate is convenient to push.

The top of the slot 22 is lower than the lowest point of the bottom of the second channel 16 because the remaining channels 16 of the slot 22 are relieved of material at the same height that weakens the tie bar 6.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Vacuum circuit breaker, including casing (1), its characterized in that: the bottom of the shell (1) is connected with a self-locking push rod (2) in a sliding way, the self-locking push rod (2) is connected with a push plate (3) in a rotating way, a rotating plate (4) rotating around the end part is sleeved on the outer side of one end of the push plate (3), a clamping block (5) is arranged in the shell (1), the clamping block (5) is clamped with the self-locking push rod (2), the self-locking push rod (2) comprises a connecting rod (6), the connecting rod (6) is connected with a sliding sleeve (7) in a sliding way, the outer side wall of the sliding sleeve (7) is provided with a rotating shaft (8), the rotating shaft (8) is rotatably connected with the push plate (3), the upper end and the lower end of the sliding sleeve (7) are both connected with a first spring (9), and the other end of the first spring (9) is provided with a fixed block (10) fixedly connected with the connecting rod (6), a pushing block (11) for pushing the clamping block (5) is arranged in the connecting rod (6).

2. Vacuum interrupter according to claim 1, characterized in that: connecting rod (6) sliding connection has pull rod (12), the top and the promotion piece (11) of pull rod (12) are connected, promote piece (11) and fixture block (5) sliding connection, the bottom of pull rod (12) is provided with first baffle (13), just first baffle (13) and the first logical groove (14) sliding connection who sets up on connecting rod (6), spacing groove (15) with first baffle (13) sliding connection are seted up to the inboard of sliding sleeve (7).

3. Vacuum interrupter according to claim 1, characterized in that: the connecting rod (6) is provided with a second through groove (16), the pushing block (11) is connected with a second baffle (17) which is connected with the second through groove (16) in a sliding manner, and the second baffle (17) extends into the shell (1) and is connected with a second spring (18) between the second baffle and the shell (1).

4. Vacuum interrupter according to claim 1, characterized in that: and a third spring (19) is arranged between the fixture block (5) and the shell (1).

5. Vacuum interrupter according to claim 1, characterized in that: the push plate (3) is provided with a waist-shaped hole (20), and the waist-shaped hole (20) is rotatably connected with the rotating shaft (8).

6. Vacuum interrupter according to claim 4, characterized in that: the top of fixture block (5) is provided with first smooth surface (21) of leading, set up draw-in groove (22) with fixture block (5) joint on connecting rod (6), just the top of draw-in groove (22) is provided with leads smooth surface (23) with first smooth surface (21) looks adaptation second of leading.

7. Vacuum interrupter according to claim 6, characterized in that: the top of the clamping groove (22) is lower than the lowest point of the bottom of the second through groove (16).