WO2013053283A1 - Rotation double-breakpoint movable contact module - Google Patents

Abstract

A rotation double-breakpoint movable contact module comprises a rod-shaped block rotor（101）、a first connection rod(102)、a second connection rod(103)and a contact bridge(104). The rod-shaped block rotor（101）is single-phase independent. At the centre of the rod-shaped block rotor（101）is provided a first through-hole (110),in which is installed a first axle(105). A first recess(111)is formed on each axial side surface of the rod-shaped block rotor（101）.In the first recesses(111) are installed contact springs(108),which can move in the range defined by the first recess(111). The first connection rod(102)is mounted onto the rod-shaped block rotor（101）.The second axle (106) penetrates through the first connection rod (102).The second axle (106) and the third axle (107) respectively penetrate through the second rod (103). The contact bridge(104) is designed to penetrate through the rod-shaped block rotor（101）. The out profile of the contact bridge (104) is centrally symmetrical. The first axle (105) and the third axle (107) respectively penetrate through the contact bridge(104) and onto the two sides end point are soldered contacts. The rotation double-breakpoint movable contact module can attract and break the movable contact when a large current short-circuit is occurred, quickly open and doesn't spring back, and keep the pressure balance between two contact point.

Description

 Rotating double break point moving contact module

 The present invention relates to a contact module for a circuit breaker, and more particularly to a rotary double break point contact module in a circuit breaker operating mechanism. Background technique

 The double breakpoint form of molded case circuit breaker is one of the development directions of today's molded case circuit breaker products. The contact module part has been paid great attention as an important part of molded case circuit breaker, and the new high-breaking plastic case open circuit Basically, the rotary double-break point moving contact structure is adopted, and the structure is various. There are many rotating rotary contact structures with additional functions in the similar products at home and abroad. The main additional function is the automatic card after the contact is repudiated by the electric repulsion. The anti-bounce function of the present invention is different from the conventional structure in the structure of the rotary double-break point moving contact according to the present invention, and provides a distracting and locking device with a simple structure, excellent reliability, and fewer parts used. Once the contact bridge is distracted by a small angle, the clamping device can quickly snap the contact bridge to the limit of the contact opening distance. Another problem that must be solved by rotating the double-break contact structure is to maintain the two-side contacts. The balance of pressure, the invention can greatly improve the balance of the pressure between the two sets of contacts and make them meet the requirements of the expected contact pressure; in addition, there is a spring protection structure, the protection spring is not damaged by the arc or metal particles.

Patent Application No. 200810040543.0, issued to CN 101320659A, discloses a rotary double breakpoint structure of a molded case circuit breaker, comprising: a rod-shaped block rotor having axial bores in the axial geometric center and a plurality of axial sides The central symmetrical connecting rod through hole has a centrally symmetric interlocking hole at both axial ends, the radial center has a contact through hole, and the radial side walls have an opening for the contact bridge; the contact bridge passes through the contact bridge The through hole is placed in the opening of the rod block rotor, the axial geometric center of the contact bridge has a second through hole, the shaft hole of the rod block rotor is aligned, the second shaft passes through the second through hole and the shaft hole, and the contact bridge a first through hole having a plurality of central symmetry; a set of links each having a connecting hole and a protruding short axis, the connecting hole being aligned with a first through hole on the contact bridge, and a set of first axes respectively passing through each other Aligning the connecting hole and the first through hole, the protruding short shaft is placed in a connecting rod through hole on the rod block rotor; a set of contact springs, each of which is fixed at the center symmetrical two first On the shaft. The rotary double break point structure disclosed in the above patent application is in the contact bridge, using the slider mechanism, the non-link mechanism, the mechanical movement trajectory of the slider mechanism and the link mechanism is completely different, and the slider mechanism is easy to cause sliding friction to the movement. Flexibility has an impact. Furthermore, there are mounting holes in the rod-shaped rotor, which makes the assembly order more and the assembly is not simple enough. Summary of the invention

 The invention aims to propose a novel rotary double-break point moving contact module structure in a contact module of a molded case circuit breaker, which realizes a high-current short-circuit breaking contact of a rotating double-break point moving contact, and can quickly open without rebounding, two The contact contacts are pressure balanced.

 According to the present invention, a rotary double break point moving contact module is proposed, comprising:

 a rod-shaped block rotor, the rod-shaped block rotor is single-phase independent, the rod-shaped block rotor has a first through hole at a center thereof, and the first through hole is provided with a first shaft, and the rod-shaped block rotor has a first portion on each side in the axial direction a groove in which the contact spring is mounted, and the contact spring can move within a range defined by the first groove;

 a first link, mounted on the rod block rotor, the second shaft passing through the first link;

 a second link, the second shaft and the third shaft respectively pass through the second link;

 The contact bridge is disposed through the rod-shaped rotor, and the outer contour of the contact bridge is center-symmetrical. The first shaft and the third shaft respectively pass through the contact bridge, and the contact bridge is welded with contacts at the ends on both sides.

 In one embodiment, the rod-shaped block rotor has two opposing circular slots on each of the axial sides, wherein the geometric center of the two interlocking holes on the same side of the axial direction is connected to the shaft a fixed angle between the center lines of the two semi-circular slots on the same side, the interlocking holes and the semi-circular holes on different sides of the axial direction are respectively axially concentric; the rod-shaped rotor is The radial direction has irregular through holes, the width of the irregular through holes enables the contact bridge to pass therethrough, and the rod block rotor further has a second groove in the radial direction, and the second groove is disposed around each of the semicircular slots.

In one embodiment, the irregular through hole has two centrally symmetrical first curved surfaces that cooperate with the outer contour of the contact bridge to limit the initial pressure position and the maximum repulsion position of the contact bridge. The outer contour of the contact bridge has two centrally symmetric second curved surfaces, and the second curved surface cooperates with the first curved surface. In one embodiment, a first link is mounted in the two semi-circular slots that are concentric in the axial direction, and the first link slides in the second groove with the semicircular slot as a center of rotation, and the rotation angle of the first link is The length of the second groove is limited. The two sides of the first connecting rod respectively have a short shaft and a second through hole protruding outward, the short shaft is matched with the semicircular slot, and the second through hole is matched with the second shaft; the plane thickness of the first connecting rod is not greater than the second The depth of the groove.

 In one embodiment, the second link has a third through hole and a fourth through hole at both ends, wherein the third through hole is engaged with the second shaft, and the fourth through hole is engaged with the third shaft.

 In one embodiment, the contact bridge has two centrally symmetric fifth through holes, and the third through holes are mounted with a third shaft; the center of the contact bridge has a waist hole, and the first shaft is installed in the waist hole, One shaft can slide along the length of the groove in the waist hole, and the groove length direction of the waist hole is at a fixed angle with the contact welding surface of the welding contact on the contact bridge.

 In one embodiment, the contact springs are hung on two centrally symmetrical second shafts and move within the first recess of the rod rotor.

 The rotary double-break point moving contact module of the invention can realize the rotating double-break point moving contact, the large current short-circuit breaking moving contact, the quick opening without rebounding and the pressure balance of the two contact contacts. DRAWINGS

 The above and other features, aspects and advantages of the present invention will become more apparent from

 1a, 1b, 1c, 1d and 1e disclose structural assembly drawings of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention.

 Figures 2a and 2b illustrate a contact bridge of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention.

 Figures 3a, 3b, 3c and 3d disclose a rod-shaped block rotor of a rotary double break point contact module in accordance with an embodiment of the present invention.

4a, 4b and 4c disclose a first link of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention. Figures 5a and 5b illustrate a second link of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention.

 Figure 6 is a block diagram showing the structure of a rotary double break point moving contact module in a trip position or a trip position in accordance with an embodiment of the present invention.

 Figure 7 is a block diagram showing the structure of a rotary double break point moving contact module in a closing position in accordance with an embodiment of the present invention.

 Figure 8 is a block diagram showing the structure of a rotating double break point moving contact module at a dead center in accordance with an embodiment of the present invention.

 Figure 9 is a block diagram showing the structure of a rotating double break point moving contact module in a maximum retracted position in accordance with an embodiment of the present invention.

 Figures 10a and 10b illustrate a structural schematic view of a rotating double breakpoint moving contact module in an unbalanced force position, in accordance with an embodiment of the present invention. detailed description

 The invention provides a rotary double break point moving contact module. 1 through 10 illustrate a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention. The rotary double break point moving contact module comprises: a rod block rotor 101, a first link 102, a second link 103, a contact bridge 104, a first shaft 105, a second shaft 106, a third shaft 107 and contacts Spring 108.

 The rod-shaped block rotor 101 is single-phase independent, the center of the rod-shaped block rotor 101 has a first through hole 1 10 in which the first shaft 105 is mounted, and the rod-shaped block rotor 101 is on each side in the axial direction. There is a first groove 1 1 1 , and a contact spring 108 is mounted in the first groove 1 1 1 , and the contact spring 108 can move within a range defined by the first groove 1 1 1 .

 The first link 102 is mounted on the rod block rotor 101, and the second shaft 106 is passed through the first link

102.

 The second shaft 106 and the third shaft 107 pass through the second link 103, respectively.

The contact bridge 104 is disposed through the rod-shaped block rotor 101. The outer contour of the contact bridge 104 is center-symmetrical, and the first shaft 105 and the third shaft 107 pass through the contact bridge 104, respectively, and the contact bridge 104 is welded with contacts at the ends of the two sides. Figures 3a, 3b, 3c and 3d disclose a rod-shaped block rotor of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention. On each side of the axial direction, the rod-shaped block rotor 101 has two centrally symmetric interlocking holes 112 with respect to the rod-shaped block rotor 101 and two centrally symmetric semi-circular slots 113 opposed to the rod-shaped block rotor. The total number of the interlocking holes 112 and the semicircular slots 113 is four. The line connecting the geometric centers of the two interlocking holes 112 on the same side of the axial direction is at a fixed angle with the center line of the two semicircular slots 113 on the same side in the axial direction, at the axis The linkage holes 112 and the semi-circular slots 113 on the different sides of the direction are each axially concentric. The rod block rotor 101 has irregular through holes 114 in the radial direction, and the width of the irregular through holes 114 enables the contact bridge 104 to pass therethrough. The irregular through hole 114 has two centrally symmetrical first curved surfaces 116 that cooperate with the outer contour of the contact bridge 104 to limit the initial pressure position and the maximum repulsion position of the contact bridge 104. The rod-shaped block rotor 101 further has a second groove 115 in the radial direction, and the second groove 115 is disposed around each of the semi-circular holes 113, and therefore, the number of the second grooves 115 is also four.

 Figures 2a and 2b illustrate a contact bridge of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention. The contact bridge 104 has two centrally symmetric fifth through holes 140, and the third through holes 140 are mounted with a third shaft 107, and the third shaft 107 and the fifth through holes 140 are fitted with a small gap. The center of the contact bridge 104 has a waist hole 141, and the first shaft 105 is mounted in the waist hole 141. The first shaft 105 is fitted with the waist hole 141 with a slight clearance and can slide in the waist direction in the waist hole 141. The groove length direction of the waist hole 141 is at a fixed angle with the contact welding surface of the welding contact on the contact bridge 104. Choosing the optimum angle by calculation ensures that the pressure contact on both sides of the contact is balanced. The outer contour of the contact bridge 104 has two centrally symmetrical second curved surfaces 142. The second curved surface 142 cooperates with the first curved surface 116 on the irregular through hole 114, and the first curved surface 116 and the second curved surface 142 are fitted with a small gap.

4a, 4b and 4c disclose a first link of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention. The first connecting rod 102 is mounted in the two semi-circular slots 113 which are concentric in the axial direction, and the first connecting rod 102 slides in the second recess 115 with the semicircular slot 113 as a center of rotation, and the rotation angle of the first connecting rod 102 is The length of the second groove 115 is limited. The two sides of the first connecting rod 102 respectively have a short shaft 120 and a second through hole 121 protruding outward. The short shaft 120 cooperates with the semicircular slot 113, and the second through hole 121 cooperates with the second shaft 106. The second shaft 106 passes through the second through hole 121 and cooperates with the second through hole 121 with a small gap. The plane thickness of the first link 102 is not greater than the second groove 115 The depth is such that the second groove 1 15 can effectively limit the range of motion of the first link 102. The out-of-plane contour of the first link 102 does not affect its free rotation within a certain range of angles.

 Figures 5a and 5b illustrate a second link of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention. The second link 103 has a third through hole 130 and a fourth through hole 131 at both ends, wherein the third through hole 130 is engaged with the second shaft 106, and the fourth through hole 131 is engaged with the third shaft 107.

 The first shaft 105 passes through the first through hole 110 of the rod-shaped block rotor 101 and the waist hole 141 of the contact bridge 104 in the axial direction of the rod-shaped block rotor 101, and the first shaft 105 and the first through hole 1 10 and The waist holes 141 are each fitted with a small clearance. The two second shafts 106 pass through the second through holes 121 of the first link 102 and the third through holes 130 of the second link 103 in the axial direction of the rod block rotor 101 in a center symmetrical manner. The contact spring 108 is hung on two centrally symmetrical second shafts 106. The contact spring 108 moves in the first groove 1 1 1 on both axial sides of the rod block rotor 101. The third shaft 107 passes through the fourth through hole 131 of the second link 103 and the fifth through hole 140 of the contact bridge 104 in the axial direction of the rod block rotor 101 in a center symmetry manner.

 6-10 illustrate the operation of a rotary double breakpoint moving contact module in accordance with an embodiment of the present invention. FIG. 6 is a schematic view showing the structure at the opening position or the tripping position, FIG. 7 is a schematic structural view at the closing position, FIG. 8 is a schematic view showing the structure at the dead position, and FIG. 9 is disclosed at the maximum repulsion position. Schematic diagram of the structure, Figure 10 shows the structure of the unstressed position.

 When the circuit breaker is opened, at this time, under the action of the contact spring force, the connecting rod is rotated counterclockwise, and the force is transmitted to the first link through the first shaft, forcing the first link to rotate counterclockwise. At the same time, the four-bar linkage mechanism formed by the first connecting rod 1, the second connecting rod and the contact bridge forces the contact bridge to rotate counterclockwise, and the second curved surface of the final contact bridge depends on the first curved surface of the rod-shaped block rotor, and the rotating double The structure of the breakpoint moving contact module remains as shown in Figure 6.

 For the circuit breaker re-buckle position, it is the same as the trip position, and the description will not be repeated here.

When the circuit breaker is closed, at this time, under the action of the contact spring tension, the connecting rod is rotated counterclockwise, and the force is transmitted to the first link through the first shaft, forcing the first link to rotate counterclockwise. At the same time, the four-bar linkage mechanism formed by the first connecting rod, the second connecting rod and the contact bridge forces the contact bridge to rotate counterclockwise, and finally the contact on the contact bridge contacts the static contact, and the rotating double-break point moving contact module Knot The structure remains as shown in Figure 7.

 The rotary double-break point moving contact module of the invention can realize the rotating double-break point moving contact, the large current short-circuit breaking moving contact, the quick opening without rebounding and the pressure balance of the two contact contacts.

 The above embodiments are provided to those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications and changes to the above embodiments without departing from the scope of the present invention. It is not limited by the above embodiments, but should be the widest range of innovative features mentioned in the claims.

Claims

Rights request A rotary double break point moving contact module, characterized in that  a rod-shaped block rotor, the rod-shaped block rotor is single-phase independent, the center of the rod-shaped block rotor has a first through hole, a first shaft is installed in the first through hole, and the rod-shaped block rotor is on each side of the axial direction The first groove has a contact spring mounted therein, and the contact spring can move within a range defined by the first groove;  a first link, mounted on the rod-shaped block rotor, the second shaft passing through the first link; the second link, the second shaft and the third shaft respectively passing through the second link;  The contact bridge is disposed through the rod-shaped rotor, and the outer contour of the contact bridge is center-symmetrical. The first shaft and the third shaft respectively pass through the contact bridge, and the contact bridge is welded with contacts at the ends of the two sides. 2. The rotary double break point moving contact module according to claim 1, wherein the rod block rotor has the same one in the center axial direction of each of the rod-shaped block rotors on each of the axial sides. The line connecting the geometric centers of the two interlocking holes on the side is at a fixed angle with the center line of the two semicircular holes on the same side in the axial direction, and the interlocking holes on the different sides of the axial direction And semicircular slots are each axially concentric;  The rod block rotor has irregular through holes in the radial direction, the irregular through holes have a width such that the contact bridge can pass through, and the rod block rotor further has a second groove in the radial direction, and the second groove surrounds each semicircle Slot settings. 3. The rotary double break point moving contact module according to claim 2, wherein the irregular through hole has two centrally symmetric first curved surfaces, and the first curved surface cooperates with an outer contour of the contact bridge. , Limit the initial pressure position and maximum retraction position of the contact bridge. 4. The rotary double break point moving contact module according to claim 3, wherein the outer contour of the contact bridge has two second curved surfaces that are centrally symmetric, and the second curved surface and the second surface A curved surface fits. 5. The rotary double-break point moving contact module according to claim 2, wherein a first connecting rod is installed in two semi-circular slots which are concentric in the axial direction, and the first connecting rod is formed by the semi-circular slot The center of rotation slides within the second groove, and the angle of rotation of the first link is limited by the length of the second groove. The rotary double-break point movable contact module according to claim 5, wherein two sides of the first link respectively have a short axis and a second through hole protruding outward, and the short axis and a semi-circular slot fits, the second through hole mates with the second shaft;  The plane thickness of the first link is not greater than the depth of the second groove. The rotary double break point moving contact module according to claim 1, wherein the second connecting rod has a third through hole and a fourth through hole at two ends, wherein the third through hole and the third through hole The two-axis is matched, and the fourth through hole is matched with the third shaft. 8. The rotary double break point moving contact module according to claim 1, wherein the contact bridge has two centrally symmetric fifth through holes, and the third through holes are mounted with the third axis; the center position of the contact bridge The utility model has a waist hole, the first shaft is installed in the waist hole, and the first shaft can slide along the groove length direction in the waist hole, and the groove length direction of the waist hole is formed with the contact welding surface of the welding contact on the contact bridge Fixed angle. 9. The rotary double break point moving contact module according to claim 1, wherein the contact spring is hung on the two centrally symmetrical second shafts and moves in the first groove of the rod block rotor .