CN110828206B

CN110828206B - Neutral line overlapping conversion mechanism

Info

Publication number: CN110828206B
Application number: CN201911111359.5A
Authority: CN
Inventors: 程少勇; 过孝刚; 张海根
Original assignee: Shanghai Electric Group Corp
Current assignee: Shanghai Electric Group Corp
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2021-10-01
Anticipated expiration: 2039-11-14
Also published as: CN110828206A

Abstract

The invention provides a neutral line overlapping conversion mechanism, which is characterized in that: including base, ratchet one, ratchet two, contact pivot one, contact pivot two and pivot one and pivot two of being connected with ABC looks pivot, contact pivot one sets up with pivot two with one heart, contact pivot two sets up with pivot one with one heart, ratchet one and contact pivot one fixed connection, ratchet two and contact pivot two fixed connection, contact pivot one and contact pivot two establish on the base, are equipped with torsional spring two between contact pivot one and the base, are equipped with torsional spring one between contact pivot two and the base, are equipped with the ratchet drag hook subassembly that carries out reciprocating motion between ratchet one and ratchet two between ratchet one and the ratchet two. The invention has simple structure, can not fall off or be stuck, and the tension spring can lead the conversion speed between the common use and the standby use to be fast, the transmission efficiency to be high and the cost to be reduced.

Description

Neutral line overlapping conversion mechanism

Technical Field

The invention relates to a neutral line overlapping and switching mechanism, in particular to a neutral line overlapping and switching mechanism of an automatic change-over switch.

Background

At present, the mode adopted by the automatic change-over switch for realizing the neutral line overlapping change-over mostly adopts a mechanism with multiple gear sets meshed, the transmission efficiency is lower in the using process, and the problems of gear jamming or gear disengagement can also occur. When A, B, C phase on the normal or standby side is disconnected, the neutral line (N phase) has no mechanism for maintaining contact pressure, and is supported by inertia only, so that the contact pressure is lost in the actual use process, the overtravel is reduced, and the temperature rise is increased.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the existing automatic transfer switch neutral line overlapping transfer mechanism is low in transmission efficiency, gears are prone to being stuck and falling off, a mechanism for maintaining contact pressure is not arranged on a neutral line (N phase), and the problem that temperature rise is increased due to the fact that contact pressure is lost in the actual use process and over travel is reduced due to the fact that inertial support is only used.

In order to solve the above problems, an aspect of the present invention is to provide a neutral line superposition conversion mechanism, including: including base, ratchet one, ratchet two, contact pivot one, contact pivot two, all be connected with A, B, C looks pivot one and the pivot two of all being connected with A, B, C looks pivot, contact pivot one sets up with the pivot two is concentric, contact pivot two sets up with pivot one is concentric, ratchet one and contact pivot one fixed connection, ratchet two and contact pivot two fixed connection, contact pivot one and contact pivot two establish on the base, are equipped with torsional spring two between contact pivot one and the base, are equipped with torsional spring one between contact pivot two and the base, are equipped with the ratchet drag hook subassembly that carries out reciprocating motion between ratchet one and ratchet two between ratchet one and the ratchet two.

Preferably, the ratchet drag hook assembly comprises a ratchet drag hook clamped with a groove of the first ratchet wheel or a groove of the second ratchet wheel, and a connecting rod used for limiting the rotating positions of the first ratchet wheel and the second ratchet wheel, the connecting rod is arranged on the base and movably connected with the base and the ratchet drag hook, the ratchet drag hook is arranged on the base and drives the connecting rod to reciprocate on the base, and a tension spring is arranged between the base and the connecting rod.

Preferably, the base is provided with a sliding groove, and the ratchet wheel drag hook is arranged in the sliding groove to reciprocate.

Preferably, the base is provided with a third boss and a fourth boss for limiting the rotation position of the connecting rod.

Preferably, a boss seventh is arranged on the base, and a second hole matched with the boss seventh is formed in the connecting rod.

Preferably, the base is provided with a second boss, and the connecting rod is provided with a first hole matched with the second boss.

Preferably, the ratchet draw hook is provided with a first boss, and the ratchet draw hook is provided with a long waist hole matched with the first boss.

Preferably, the extension spring is connected with the base and the connecting rod through a fifth boss arranged on the base and a sixth boss arranged on the connecting rod.

Preferably, the base is provided with a first clamping groove for fixing the first torsion spring, the contact rotating shaft II is provided with a first limiting device for clamping the first torsion spring, one end of the first torsion spring is arranged in the first clamping groove, and the other end of the first torsion spring is fixed through the first limiting device; and a second clamping groove for fixing a second torsion spring is formed in the base, a second limiting device for clamping the second torsion spring is arranged on the first contact rotating shaft, one end of the second torsion spring is arranged in the second clamping groove, and the other end of the second torsion spring is fixed through the second limiting device.

Preferably, the first limiting device is a first protrusion and a second protrusion, and the second limiting device is a third protrusion and a fourth protrusion.

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

according to the invention, the ratchet mechanism and the spring are adopted to realize the overlapping conversion of the neutral line, the ratchet drag hook is positioned in the fixed chute, the ratchet wheel is fixed on the contact rotating shaft, the structure is simple, and the phenomena of falling and blocking cannot occur.

Drawings

FIG. 1 is a schematic view of the connection between the shaft and the ratchet retractor assembly of the present invention;

FIG. 2 is a schematic structural diagram of a neutral line overlap switching mechanism according to the present invention;

FIG. 3 is a schematic view of the base and ratchet retractor assembly;

FIG. 4 is a schematic view of the connection between the base and the torsion spring;

fig. 5 is a schematic diagram of the connection between the contact rotating shaft and the torsion spring.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, square holes are processed on the first rotating shaft 5 and the second rotating shaft 6, and the square swing rods on the transmission mechanism are consistent with the rotating shaft A, B, C; the contact rotating shaft II 4 and the contact rotating shaft I2 are respectively assembled at the concentric positions with the rotating shaft I5 and the rotating shaft II 6, and limiting devices are arranged on the four rotating shafts; the ratchet wheel II 3 and the ratchet wheel I1 are respectively fixed on the contact rotating shaft II 4 and the contact rotating shaft I2; as shown in fig. 2 and 3, the ratchet retractor 7 is installed in the sliding slot 10 of the base 31, and the second hole 27 of the connecting rod 9 is installed on the seventh boss 28 of the base 31 and can rotate around the seventh boss 28. The long waist hole 19 on the connecting rod 9 is installed on the boss I20 of the ratchet drag hook 7, the boss I20 of the ratchet drag hook 7 can move in the long waist hole 19 on the connecting rod 9, the hole I21 on the connecting rod 9 is installed on the boss II 22 of the base 31, the boss III 23 and the boss IV 24 of the base 31 limit the connecting rod 9, and the tension spring 8 is installed on the boss V25 of the base 31 and the boss VI 26 of the connecting rod 9. As shown in fig. 4 and 5, the first torsion spring 11 is fixed on the first slot 13 of the base 31 and the first protrusion 15 and the second protrusion 16 of the second contact rotating shaft 4, and the second torsion spring 12 is fixed on the second slot 14 of the base 31 and the third protrusion 17 and the fourth protrusion 18 of the first contact rotating shaft 2.

The invention realizes the neutral line overlapping conversion mode as follows: the contact on the side where the first rotating shaft 5 is located is in a disconnected state, the second contact rotating shaft 4 and the second ratchet wheel 3 are both in a disconnected state, the contact on the side where the second rotating shaft 6 is located is in a closed state, at the moment, the side A, B, C is disconnected, the second rotating shaft 6 is located at a disconnected position, the angle of the second rotating shaft 6 is the same as that of the first rotating shaft 5, at the moment, due to the fact that the tension spring 8 provides continuous pulling force, the ratchet wheel drag hook 7 continues to push against the first ratchet wheel 1, the contact on the side is still in a closed state, and contact pressure and overtravel in a normal closed state are kept. When the contact on the side where the rotating shaft I5 is located starts to be switched on, the side ratchet II 3 rotates anticlockwise around the circle center of the rotating shaft I5 and the circle center of the contact rotating shaft II 4, at the moment, the torsion spring I11 generates torque due to the movement of the contact rotating shaft II 4, when the movable contact and the fixed contact start to be contacted, the ratchet II 3 collides with the connecting rod 9 and is continuously contacted, the connecting rod 9 is pushed to rotate anticlockwise, the ratchet drag hook 7 gradually withdraws from the groove of the ratchet I1, after the movable contact and the fixed contact on the side where the rotating shaft I5 is located are in place, the contact pressure and the overtravel reach the requirements, at the moment, the ratchet drag hook 7 completely withdraws from the groove of the ratchet I1 and gradually enters the groove of the ratchet II 3, the ratchet drag hook 7 continuously pushes the ratchet II 3, and the contact on the side is continuously in a switching-on state until the next switching. When the ratchet drag hook 7 is completely withdrawn from the groove of the ratchet wheel I1, the contact rotating shaft I2 and the ratchet wheel I1 do clockwise rotation motion under the push of the torsion spring II 12, and the moving contact is driven to move so that the moving contact and the static contact are separated.

The invention adopts the ratchet draw hook component to prop against the ratchet fixed on the contact rotating shaft, and maintains the original contact pressure of a neutral line (N phase) when the A, B, C phase on the common or standby side is disconnected. In the overtravel generation stage of the closing process of the other side (standby or common), a mechanism arranged on a rotating shaft at the closing side (standby or common) is utilized to impact a ratchet mechanism, the closing maintaining force of a neutral line (N phase) at the other side (common or standby) is eliminated, then a torsion spring arranged on the rotating shaft at the side is utilized to disconnect the connection of a moving contact and a static contact of the neutral line (N phase), and finally the overlapping conversion of the neutral line is realized.

Claims

1. A neutral line superposition switching mechanism, characterized by: comprises a base (31), a ratchet wheel I (1), a ratchet wheel II (3), a contact rotating shaft I (2), a contact rotating shaft II (4), a rotating shaft I (5) connected with A, B, C and a rotating shaft II (6) connected with A, B, C, the contact rotating shaft I (2) and the rotating shaft II (6) are concentrically arranged, the contact rotating shaft II (4) and the rotating shaft I (5) are concentrically arranged, the ratchet wheel I (1) is fixedly connected with the contact rotating shaft I (2), the ratchet wheel II (3) is fixedly connected with the contact rotating shaft II (4), the contact rotating shaft I (2) and the contact rotating shaft II (4) are arranged on the base (31), a torsion spring II (12) is arranged between the contact rotating shaft I (2) and the base (31), a torsion spring I (11) is arranged between the contact rotating shaft II (4) and the base (31), and a ratchet wheel drag hook assembly which performs reciprocating motion between the ratchet wheel I (1) and the ratchet wheel II (3) is arranged between the ratchet wheel I (1) and the ratchet wheel II (3);

ratchet drag hook subassembly includes ratchet drag hook (7) with the recess of ratchet (1) or the recess chucking of ratchet two (3), be used for carrying out connecting rod (9) of restriction to ratchet (1) and ratchet two (3) rotational position, establish on base (31) connecting rod (9), connecting rod (9) and base (31) and ratchet drag hook (7) swing joint, ratchet drag hook (7) are established and are driven connecting rod (9) and be reciprocating motion on base (31), be equipped with extension spring (8) between base (31) and connecting rod (9).

2. A neutral line superposition conversion mechanism according to claim 1, characterized in that: the base (31) is provided with a sliding chute (10), and the ratchet drag hook (7) is arranged in the sliding chute (10) to reciprocate.

3. A neutral line superposition conversion mechanism according to claim 1, characterized in that: and a boss three (23) and a boss four (24) for limiting the rotation position of the connecting rod (9) are arranged on the base (31).

4. A neutral line superposition conversion mechanism according to claim 1, characterized in that: a boss seven (28) is arranged on the base (31), and a second hole (27) matched with the boss seven (28) is formed in the connecting rod (9).

5. A neutral line superposition conversion mechanism according to claim 1, characterized in that: and a second boss (22) is arranged on the base (31), and a first hole (21) matched with the second boss (22) is formed in the connecting rod (9).

6. A neutral line superposition conversion mechanism according to claim 1, characterized in that: the ratchet wheel draw hook is characterized in that a first boss (20) is arranged on the ratchet wheel draw hook (7), and a long waist hole (19) matched with the first boss (20) is formed in the ratchet wheel draw hook (7).

7. A neutral line superposition conversion mechanism according to claim 1, characterized in that: and the tension spring (8) is connected with the base (31) and the connecting rod (9) through a fifth boss (25) arranged on the base (31) and a sixth boss (26) arranged on the connecting rod (9).

8. A neutral line superposition conversion mechanism according to claim 1, characterized in that: the base (31) is provided with a first clamping groove (13) for fixing the first torsion spring (11), the contact rotating shaft II (4) is provided with a first limiting device for clamping the first torsion spring (11), one end of the first torsion spring (11) is arranged in the first clamping groove (13), and the other end of the first torsion spring is fixed through the first limiting device; and a second clamping groove (14) for fixing a second torsion spring (12) is formed in the base (31), a second limiting device for clamping the second torsion spring (12) is arranged on the first contact rotating shaft (2), one end of the second torsion spring (12) is arranged in the second clamping groove (14), and the other end of the second torsion spring is fixed through the second limiting device.

9. A neutral line lapped conversion mechanism as claimed in claim 8 wherein: the first limiting device is a first protrusion (15) and a second protrusion (16), and the second limiting device is a third protrusion (17) and a fourth protrusion (18).