CN204332704U - The contact mechanism of the switching device that can realize three states - Google Patents

Abstract

The utility model provides a contact mechanism of a switching device capable of realizing three states, which comprises a plurality of contact units arranged side by side; each contact unit includes a moving contact group and a static contact group; The two sides of the central part of the head group are mirror-symmetrical and extend out a movable contact plate, and each movable contact plate also includes a clap-type contact with the same orientation fixed on both sides of its outer end. And a knife-shaped plug-in contact with the same orientation; the static contact group includes two finger-shaped clap-type static contacts and a knife-shaped plug-in static contact located on both sides of the center of the moving contact group. . It can effectively reduce the electrical wear of the contacts in the process of closing or opening, and expand the rotation angle of the moving contact group, which is close to 180 degrees. It is very suitable for switching electrical appliances for three-state conversion; effectively avoids machining Point contact phenomenon caused by accumulative errors such as error, and ensure the contact pressure, so that better surface contact between the moving contact and the static contact is maintained.

Description

The contact mechanism of the switching device that can realize three states

technical field

The utility model belongs to the field of power conversion switch electric appliances.

Background technique

Power conversion switch electrical appliance is a widely used terminal electrical appliance. According to the control mode, it can be divided into three types: automatic type, manual type, and automatic/manual combined type. It mainly controls the action of the contact system through the operating mechanism to connect Or cut off the main power supply and backup power supply to ensure the safety of the power system and the continuity of production.

The contact mechanism is a mechanism that is directly connected to the power supply in the transfer switch electrical appliance. The contacts in the contact mechanism are divided into two types: moving contacts and static contacts according to whether they move. There are two types of plug-in type and knife-type plug-in type. The finger-type clap-type contacts can resist burning under the action of arc when closing or breaking the circuit, and have high making and breaking capabilities. However, due to the node current of such contacts The power is repulsion type, and the dynamic and thermal stability of the contacts are poor, and they will be repelled under the action of a relatively high short-term withstand current, so it is difficult to meet the requirements of the short-term withstand capacity stipulated in the standard. The electric power of the knife-type plug-in contact is suction type, its dynamic and thermal stability is high, and it can achieve a high short-term tolerance index. However, because this type of contact adopts a non-contact design, it is Such contacts cannot resist arc burning when the circuit is disconnected, and it is difficult to meet the requirements of high making and breaking capacity. Patent No. CN200710059760X discloses a contact unit of an automatic transfer switch. The moving contact group includes both finger-type clap-type moving contacts and knife-type plug-in moving contacts. The static contact group is equipped with two corresponding One finger-type snap-fit static contact and two knife-type plug-in static contacts not only utilize the advantages of the two types of contacts, but also effectively avoid the disadvantages. However, the contact unit of this structure also has disadvantages: 1. There are two knife-type plug-in static contacts, and the structure is relatively complicated, which increases the cost and the possibility of failure; 2. Two knife-type contacts are arranged on both sides of the moving contact group Type plug-in static contact and two finger-type snap-in static contacts, and a spring and bracket should be set between the knife-type plug-in static contact and finger-type snap-in static contact. Therefore, the remaining space for the moving contact The effective rotation angle range is relatively limited, and can only reach a maximum angle range of 90 degrees, which is not suitable for switching devices that require a double-open state in addition to the main close and standby close.

The inventor provides an automatic/manual switching appliance, which can be controlled by electric control or manual control to realize the connection of the main power supply (commonly used power supply) (that is, "main closing"), the main power supply and the The conversion of the three states of the backup power supply being disconnected (that is, "double split") and the backup power supply being connected (that is, "preparation and closing").

This application focuses on the separate protection of the contact mechanism that cooperates with this type of switching device capable of switching between three states.

Contents of the invention

In order to achieve the above object, the technical solution of the utility model is achieved in that:

The contact mechanism of the switching device that can realize three states, including a plurality of contact units arranged side by side;

Each contact unit includes a casing, a moving contact group, a static contact group and two arc extinguishing chambers placed in the casing;

There are passage holes for passing through the main shaft on the shell and the center of the moving contact group, and the moving contact group is fitted on the main shaft through the passing holes and can rotate with the rotation of the main shaft in the case;

The two sides of the central part of the moving contact group are mirror-symmetrically centered on the passing hole, and a moving contact plate part is extended outward, and the moving contact plate parts on both sides are electrically connected to each other, and each moving contact plate part It also includes a snap-in contact and an arc-shaped knife-type plug-in contact fixed on both sides of its outer end, and the arc-shaped direction of each knife-shaped plug-in contact is passed through the center. The hole is the center of the circle; due to the mirror image symmetry, the knife-type plug-in contacts of the two moving contact boards face the same direction, and the respective snap-in contacts also face the same direction.

The static contact group includes two finger-type clap-type static contacts and a knife-type plug-in static contact located on both sides of the center of the moving contact group; The joint part of the contact body is correspondingly arranged on the moving path of the knife-type plug-in contact body, and the respective contacts of the two finger-type snap-fit static contacts face opposite directions and correspond to the snap-fit contacts of a moving contact plate. .

Further, the two arc extinguishing chambers are respectively located in the spaces between the two finger-type snap-in static contacts and the knife-type plug-in static contacts, and are respectively close to the corresponding finger-type snap-in static contacts.

Furthermore, an iron baffle is added between the arc extinguishing chamber and the inner wall of the shell to prevent the arc from being directly sprayed onto the inner wall of the shell. Further, a screen perpendicular to the length direction of the baffle is also provided in the length direction of the baffle. The baffle also guides the arc, making the arc move towards the screen.

The utility model also makes further improvements to the moving contact group,

The moving contact group includes: a central part and a moving contact,

The central part includes a central part shell formed by butting and fixing two circular front and rear half shells. The circumference of the central part shell is symmetrical with the center of the shell, and each has a moving contact plate part. Through the hole, there is a through hole in the center of the central shell for passing through the main shaft and being fitted on the main shaft, and the size and shape of the through hole match the size and shape of the cross section of the main shaft to ensure that the wall of the through hole fits closely with the periphery of the main shaft , the main shaft directly drives the center shell to rotate through the hole.

The moving contacts include:

The center connection plate is clamped in the center shell (between the front and rear half shells). There is a through hole in the center of the center connection plate for the main shaft to pass through, and there is a gap between the through hole and the main shaft ( That is, the main shaft does not directly drive the moving contact to rotate through the hole);

It also includes a movable contact plate part which is respectively located on both sides of the central connection plate and passes through the central part housing. The plates realize the electrical conduction between each other. Each movable contact plate also includes a snap-in contact and an arc-shaped knife-type plug-in contact fixed on both sides of its outer end, and the two movable contacts The snap-fit contacts on the headboard all face the same direction.

There is a gap between the moving contact plate part and the moving contact plate part passing hole.

Further, an elastic device is added in the central part housing, that is, the same number of symmetrically arranged spring abutting parts are arranged symmetrically on both sides of the central connecting plate of the moving contact located on its passing hole, and each spring abutting part Correspondingly accommodate and abut the bottom of a vertically upward spring of the same specification and length, and the top of each spring abuts against the corresponding abutting top in the central housing.

Still further, the utility model provides a structure of adding an elastic device: the central connecting plate of the movable contact is located on both sides of the through hole, and the connecting pins pass through the connecting holes on the central connecting plate to connect A U-shaped spring sleeve is fixed on the central connection plate, and the two vertical arms of each U-shaped spring sleeve are respectively located on the front and rear sides of the central connection plate, and each of them is provided with a spring accommodating groove as a spring abutment part, and each spring The abutting part correspondingly accommodates and abuts against the bottom of a vertically upward spring of the same specification and length, and the top of each spring abuts against a corresponding abutting part provided in the housing of the central part.

Furthermore, the utility model also provides another structure for adding elastic devices: the central connecting plate of the movable contact is located on the plates on both sides of the hole through which it passes, and two openings are respectively opened upwards on each side. Each spring receiving notch acts as a spring abutment part, each spring abutment part correspondingly accommodates and abuts the bottom of a vertically upward spring of the same specification and length, and the top of each spring Each abuts against a corresponding abutting portion provided in the housing of the central portion.

The utility model also provides a double-piece moving contact group, which includes:

The center part and two moving contacts with the same shape,

The central part includes a central part shell formed by butting two circular front and rear half shells and fixing them together through bolts and nuts. The moving contact plate part passes through the hole, and the center of the central part housing is provided with a passing hole for passing through the main shaft (that is, the main shaft used for power transmission in the switchgear) and set on the main shaft, and the size and shape of the passing hole are consistent with the main shaft The size and shape of the cross-section match to ensure that the hole wall fits closely with the periphery of the main shaft, and the main shaft directly passes through the hole to drive the central shell to rotate accordingly.

Each moving contact includes:

The center connection plate is clamped in the center shell (between the front and rear half shells). There is a through hole in the center of the center connection plate for the main shaft to pass through, and there is a gap between the through hole and the main shaft ( That is, the main shaft does not directly drive the moving contact to rotate through the hole);

It also includes a movable contact plate part which is respectively located on both sides of the central connection plate and passes through the central part housing. The plates realize the electrical conduction between each other. Each movable contact plate also includes a snap-in contact and an arc-shaped knife-type plug-in contact fixed on both sides of its outer end, and the two movable contacts The snap-fit contacts on the headboard all face the same direction.

There is a gap between the moving contact plate part and the moving contact plate part passing hole;

There is also a partition made of insulating material between the two moving contacts. Through holes with the same shape and corresponding position.

Further, in order to ensure better synchronous rotation of the two moving contacts and the partition, each moving contact has a synchronous hole on both sides of the hole through which it passes, and the front and rear sides of the partition are provided with corresponding synchronous holes for extending into the corresponding synchronization holes. The synchronous axis of the hole.

At the same time, a spring device is added to the double-piece moving contact group. The structure of the spring device is more suitable for providing a spring receiving notch on each piece of moving contact to act as a spring abutment part, and this part will not repeat it.

The utility model also provides a new structure of knife-type plug-in static contacts of two static contact groups, one is a single-piece type, and the other is a double-piece type.

The one-piece knife-type plug-in static contact includes a copper bar, a U-shaped connecting plate and a bracket;

The U-shaped connecting plate includes the bottom and vertical plates on both sides, the bottom of which is electrically connected to the copper bar, and the vertical plates on both sides are inclined sections and vertical sections from the bottom to the top;

The bracket includes two connecting parts parallel to each other with an insertion gap between them, and a side plate located on the same side of the two connecting parts and fixing the two connecting parts together. The side plate is perpendicular to the two connecting parts. The above insertion gap is for inserting the knife-type plug-in contact body of the movable contact, and each connecting part has a vertical plate parallel to the insertion gap for the vertical plate of the U-shaped connecting plate to extend from bottom to top and accommodate it. slot, and each connecting portion also has a roller slot hole vertical to and through the vertical plate placement slot, the vertical section of a vertical plate of the U-shaped connecting plate passes through the roller slot hole, and A roller is arranged in the roller slot hole on the side of the vertical section facing the other connecting part to abut against the vertical section, and a spring and a fixed end cover are abutted in turn in the roller slot hole on the other side of the vertical section, And the height of the opening of the roller slot towards the connecting part on the other side is slightly smaller than the diameter of the roller, and a part of the roller can be exposed outside the opening under the thrust of the spring, and the opposite two rollers on the two connecting parts The distance between the axes is slightly smaller than the thickness of the knife-type plug-in contact body of the moving contact.

Further, in order to reduce the contact interference of other parts between the connecting parts when the knife-type plug-in contact body is inserted into the insertion gap between the two connecting parts, so that the contact body can be inserted more smoothly and the contact with the roller is more direct. The inner wall of the connecting part at the opening of the roller slot hole of the connecting part also protrudes outwards to form a convex body.

Further, in order to make the movement of the roller along the roller slot more smooth, roller posts are protruding from both ends of the roller, and matching slideway grooves are formed on both side walls of the roller slot.

Two-piece knife-type plug-in static contact, including copper bars, U-shaped connecting plates, second U-shaped connecting plates and brackets;

The U-shaped connecting plate includes the bottom and vertical plates on both sides, the bottom of which is electrically connected to the copper bar, and the vertical plates on both sides are inclined sections and vertical sections from the bottom to the top;

The second U-shaped connecting plate has the same bottom as the U-shaped connecting plate, the inclined section and the vertical section of the two vertical plates, and the bottom of the second U-shaped connecting plate is fixedly electrically connected with the copper bar and is located at the bottom of the U-shaped connecting plate. On the side of the bottom, the two vertical plates of the second U-shaped connecting plate are respectively in the same plane as the vertical plates of the U-shaped connecting plate, and the top of each vertical section of the second U-shaped connecting plate also extends laterally a transverse section positioned above a corresponding vertical section of the U-shaped web;

The bracket includes two connecting parts parallel to each other with an insertion gap between them, and a side plate located on the same side of the two connecting parts and fixing the two connecting parts together. The side plate is perpendicular to the two connecting parts. The above-mentioned insertion gap is for inserting the knife-type plug-in contact body of the movable contact, and each connecting part has a vertical plate parallel to the insertion gap for the U-shaped connecting plate and the second U-shaped connecting plate to extend from bottom to top. And accommodate the vertical board placement groove therein, and each connecting part also has a roller slot hole and a second roller slot hole that are distributed up and down and are perpendicular to and penetrate through the vertical board placement groove;

The vertical section of a vertical plate of the U-shaped connecting plate passes through the roller slot and a roller is provided in the roller slot on the side of the vertical section towards the other connecting part to abut against the vertical section. A spring and a fixed end cover are sequentially abutted in the roller slot hole on the other side;

The transverse section of a vertical plate of the second U-shaped connecting plate passes through the second roller slot, and a roller is also provided in the second roller slot on the side of the transverse section facing the other connecting part to abut against the transverse section Then, a spring and a fixed end cover are also sequentially abutted in the second roller slot hole on the other side of the transverse section;

The opening height of the roller groove and the second roller groove toward the other side connection part is slightly smaller than the diameter of the roller inside it, and a part of the roller can be exposed outside the opening under the thrust of the respective springs, and the two The distance between the two opposing rollers on each connecting portion is slightly smaller than the thickness of the knife-type plug-in contact body of the moving contact.

Further, in order to reduce the contact interference of other parts between the connecting parts when the knife-type plug-in contact body is inserted into the insertion gap between the two connecting parts, so that the contact body can be inserted more smoothly and the contact with the roller is more direct. The inner wall of the connecting part that belongs to the opening of the roller slot hole of the connecting part and the second roller slot hole also protrudes outwards to form a convex body.

Further, in order to make the movement of the rollers along the roller slots more smooth, roller columns are protruding from both ends of the rollers, and the respective side walls of the roller slots and the second roller slots are also provided with matching chute slot.

Compared with the prior art, the automatic/manual switch switching appliance described in the present invention has the following advantages:

(1) It can realize the conversion of three states: double separation, main combination and backup combination.

(2) Regardless of whether the moving contact group rotates clockwise or counterclockwise, when closing, the clap-on contact of the moving contact group will be disconnected from the electrical connection first, and the knife-type plug-in contact will be separated later. The knife-type plug-in contact body of the moving contact group is first engaged with the static contact group, and the clap-type contact of the movable contact group is then engaged with the finger-type clap-type static contact of the static contact group, which can effectively reduce the double The node electric power brought by the snap-in structure reduces the operating force requirement of the main operating mechanism; and during the closing process, one end of the plug-in contact is closed before the end of the snap-in contact, thereby realizing no-load closing and effectively reducing the contact. Electrical wear during closure. In the same way, during the disconnection process of the system, one end of the plug-in contact lags behind the disconnection of the snap-on contact end, so as to realize no-load disconnection and effectively reduce the electrical wear of the contacts during the disconnection process. In addition, two finger-type clap-type static contacts and a knife-type plug-in static contact are respectively located on both sides of the center of the moving contact group, which makes the rotation angle of the moving contact group more enlarged, close to 180 degrees, and is more suitable for In addition to main closing and standby closing, there are also switching devices for three state transitions in double-opening state.

(3) Effectively avoid the point contact phenomenon caused by accumulative errors such as machining errors, and ensure the contact pressure, so as to maintain better surface contact between the moving contact and the static contact;

(4) The structure is ingenious and easy to assemble.

For other details, refer to the detailed description in the specific embodiment section.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a schematic diagram of the general assembly of the automatic/manual switch conversion electrical appliance of the present invention; in the figure: 1-manual operating mechanism; 2-operating mechanism; 3-bottom plate; 4-position feedback component; 5-main shaft; mechanism;

Figure 2 is an exploded schematic diagram of the main components in Figure 1;

Fig. 3 is a perspective schematic diagram of the assembly of the manual operating mechanism 1 in Fig. 1;

Fig. 4 is an exploded view of each component of the manual operating mechanism 1;

Fig. 5 is a schematic diagram of the state transition of the handle from laying flat to lifting up;

6 is a three-dimensional schematic diagram of the meshing state of the driving wheel 104, the left driven wheel 106, and the right driven wheel 107 in the double split state;

Fig. 7 is a demonstration state diagram of the three states of double separation (A), main combination (B) and standby combination (C) under the combination of driving wheel and left and right driven wheels;

Fig. 8 is a demonstration state diagram of the three states of double separation (A), main combination (B) and standby combination (C) under the combination of driving wheel and left and right driven wheels;

Fig. 9 is a schematic diagram showing three state transitions by looking up from the lower direction of the "lower fixing plate 110";

Fig. 10 is a three-dimensional schematic diagram of the energy storage linkage assembly of the operating mechanism;

Fig. 11 is an exploded schematic view of each component of the energy storage linkage assembly;

Fig. 12 and Fig. 13 are respectively the front view and perspective view of the main shaft seat wheel 203;

Fig. 14 mainly shows the explosion diagram of the components of the connecting rod energy storage unit, and the closing lever 207 is not shown;

Figure 15 mainly shows the comparative schematic diagrams of the energy storage linkage assembly of the operating mechanism in the three states of double separation (A), main closure (B) and standby closure (C);

Fig. 16 is a three-dimensional schematic diagram of the combination of the handle operating mechanism 1, the energy storage linkage assembly and the electric control assembly;

Fig. 17 is a three-dimensional schematic diagram after hiding the double-point electromagnet switch 211 and the handle operating mechanism 1 in Fig. 16;

Fig. 18 is an explosion schematic diagram of each component in Fig. 16;

Fig. 19 is a schematic view of a cross-section between the front and rear cheeks towards the rear cheek;

Fig. 20 is a schematic cross-sectional view along the axis of the main shaft 5 towards the direction of the electromagnet. At this time, the double-division electromagnet switch 211 is energized, and its iron core 2111 retracts;

Fig. 21 is the side view of main combined state (state B);

Fig. 22 is a schematic diagram showing three state transitions in a cross-sectional manner;

Fig. 23 is a schematic diagram of the structure in the double-split state with the limit piece 214 and the limit block 215 installed;

Fig. 24 is a schematic diagram of how the eccentric limit piece 214 prevents the closing lever on the other side (the standby closing lever as an example) from being pressed down by taking the main closing state (that is, state B) as an example;

Fig. 25 and Fig. 26 are three-dimensional schematic diagrams of the eccentric limiting piece 214 and the limiting block 215, respectively;

Fig. 27 is a cross-sectional view showing that the energy storage spring is in the no-load state when the limit block is not installed;

Figure 28 is a schematic diagram of the assembly of the limit block 215 to the top of the cheek plate;

Fig. 29 is a schematic diagram that the limit block 215 has been assembled on the top of the cheek plate;

FIG. 30 is an enlarged schematic diagram of the structure of the position feedback assembly 4 in FIG. 1;

Fig. 31 is an exploded view of components of a contact unit of the contact mechanism;

Figure 32 is a schematic structural diagram of the contact unit in the double-split state, with half of the shell hidden;

Fig. 33 is a schematic diagram of the state when the moving contact group rotates clockwise in the figure until it is in contact with the finger-type clapping static contact 631;

Figure 34 is a schematic diagram of the state when the moving contact group rotates counterclockwise in the figure until it is offset by the finger-type clapping static contact 632;

Fig. 35 is an exploded schematic diagram of a single-piece moving contact group;

Fig. 36 is a three-dimensional schematic diagram of the assembled components of Fig. 35;

Fig. 37 is a schematic structural diagram of a single-layer moving contact;

Figure 38 is a schematic diagram of the explosion after the elastic device is added to the moving contact group;

Fig. 39 is a three-dimensional schematic diagram of the assembled parts of Fig. 38;

Fig. 40 has provided the schematic diagram of another kind of embodiment of setting up elastic device;

Figure 41 is a principle analysis diagram of how the spring device cooperates with other parts to ensure the contact pressure;

Figure 42 is an exploded schematic diagram of a two-piece moving contact group;

Fig. 43 is a schematic perspective view of the assembled components in Fig. 42;

Figure 44 and Figure 46 are respectively the front view and perspective view of the combination of two moving contacts and the partition, and Figure 45 is the cross-sectional view of AA in Figure 44;

Figure 47 is an exploded view of an embodiment (single-piece type) of the knife-type plug-in static contact;

Fig. 48 is a three-dimensional schematic view of the assembled parts in Fig. 47;

Fig. 49 is a side view of Fig. 48, and Fig. 50 is a cross-sectional view along AA in Fig. 49;

Fig. 51 is a schematic cross-sectional view of the insertion state of the knife-type plug-in contact body 623 of the movable contact;

Figure 52 is an exploded view of another embodiment (two-piece type) of the knife-type plug-in static contact;

Fig. 53 is a schematic perspective view of the components in Fig. 52 assembled together;

Fig. 54 is a side view of Fig. 53, and Fig. 55 is a cross-sectional view along AA in Fig. 54;

Fig. 56 is a schematic cross-sectional view of the insertion state of the knife-shaped plug-in contact body 623 of the movable contact.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figure 1, the automatic/manual switch conversion electrical appliance includes a manual operating mechanism 1, an operating mechanism 2, a base plate 3, a position feedback component 4, a main shaft 5 and a contact mechanism 6, and the operating mechanism 2 drives the main shaft 5 to rotate. , the rotation of the main shaft 5 drives the contacts of the compound contact mechanism 6 to realize the connection of the main power supply (commonly used power supply) (i.e., "main close"), the main power supply and the backup power supply are both disconnected (i.e., "double points"), and the backup power supply is connected. Pass (that is, "preparation") three state transitions. The manual operating mechanism 1 is used to control the movement of the main shaft 5 when manual control is required, thereby indirectly controlling the rotation of the main shaft 5 and realizing the conversion of the three states.

The manual operating mechanism 1 mainly includes a handle 101, a driving wheel 104, a left driven wheel 106, and a right driven wheel 107, wherein the handle 101 is hinged on the upper surface of the driving wheel 104 through a handle shaft 105, so that the handle 101 can turn around the handle shaft 105, The handle cover 1012 is covered on the driving wheel 104 and is provided with an opening for accommodating the handle 101. When the handle 101 needs to be used, the handle 101 is erected. Improved aesthetics and reduced touch damage.

As shown in Figure 5, the driving wheel 104 is also provided with a handle through hole 1041 below the handle shaft 105, and the handle 101 has a protrusion 1011 extending on the other side of the handle shaft 105 centered on the handle shaft 105. The through hole 1041 is also provided with a slider 102 and a spring 103 that are in contact with each other from top to bottom. The slider 102 can move up and down in the through hole 1041 of the handle. One end of the spring 103 is against the slider 102, and the other end is against the through hole of the handle. The steps provided in 1041; the micro switch 109 is fixed under the driving wheel 104, and the switch contacts of the micro switch 109 correspond to the slider 102; Press down toward the through hole 1041 of the handle, the protrusion 1011 presses against the slider 102 and slides downward, and the lower end of the slider 102 presses against the contact of the micro switch 109, the micro switch is closed, and the motor/electromagnet of the operating mechanism is cut off. Iron circuit, enter manual operation protection. When the manual operation is canceled, the handle is put back down, the protrusion 1011 is lifted, and the slide block 102 returns to its original position under the action of the spring 103 . The micro switch is turned on, the motor/electromagnet circuit of the operating mechanism is restored, and the manual operation protection is canceled.

In this embodiment, as shown in FIG. 9 , the micro switch 109 is fixed on the lower surface of the lower fixing plate 110 at a position close to the hole 1105 of the lower fixing plate. As shown in FIG. 4 , the upper fixing plate 108 supports the rotation of the driving wheel through the upper fixing plate hole 1081 .

As shown in Figure 3 and Figure 4, between the upper and lower fixed plates, the left driven wheel 106 and the right driven wheel 107, which are symmetrical in shape, are also supported by the left shaft column 1103 and the right wheel shaft 1104, and the left driven wheel 106 and the right driven wheel The driving wheels 107 are all sector gears and the lower surface is fixed with a toggle lever (1061, 1071) facing downwards at the gears. 1. The wheel axle centers of the three wheels of the right driven wheel (106, 107) are arranged in an isosceles triangle, and the wheel axle center of the driving wheel 104 is positioned at the apex point; bottom edge, and the leftmost tooth and the rightmost tooth of the wheel tooth segment mesh with the left driven wheel 106 and the right driven wheel 107 respectively, and the toggle levers of each driven wheel are also located on the axles of the driven wheel and the driving wheel to which they belong. Between centers, when the driving wheel 104 rotates in the direction of one of the driven wheels in the process of the angle range corresponding to its tooth segment, the teeth of this wheel tooth segment break away from the meshing with the teeth of the driven wheel in the other direction and only The tooth meshes with the driven wheel in the rotation direction, and the driven wheel that is disengaged remains stationary, and the corresponding toggle lever also remains stationary. The meshed driven wheel rotates with the driving wheel, and the corresponding toggle lever also follows. To move, the movement of the toggle lever drives the operating mechanism to make corresponding actions, so as to realize the switching of corresponding states.

As shown in Figures 7 and 8, when the drive wheel and the three gear combinations of the left and right driven wheels are in a double-split state (that is, the A state in the figure), the tooth segment 1042 of the drive wheel 104 faces the drive wheel 104 and the left and right The bottom side of the isosceles triangle formed by the wheel axle centers of the three wheels of driven wheels (106, 107), and the leftmost tooth and the rightmost tooth of this wheel tooth section 1042 are respectively connected with the wheel tooth section 1062 and the right tooth of the left driven wheel 106. The tooth segments 1072 of the driven wheels 107 are meshed, and the toggle levers of the driven wheels are also located between the respective driven wheels and the axle centers of the driving wheels. Take the transition to the C state as an example: when the driving wheel 104 rotates in the direction of one of the driven wheels (such as the left driven wheel 106) within the angle range corresponding to the gear segment 1042, the teeth of the gear segment 1042 are disengaged Engagement with the teeth of the driven wheel (right driven wheel 107) in the other direction is only engaged with the teeth of the driven wheel (left driven wheel 106) in the rotation direction, and the driven wheel (right driven wheel 107) that is disengaged remains inactive. The corresponding toggle lever (1071) also remains stationary, and the engaged driven wheel (left driven wheel 106) rotates with the driving wheel, and the corresponding toggle lever (1061) also moves accordingly. The mobile drive operating mechanism makes corresponding actions to realize the switching of corresponding states; similarly, the process of switching to state B will not be described again. Of course, state B and state C can be designated as the active state or standby state according to the needs, that is, the state B is the active state, then the state C is the standby state; the state C is the active state, and the state B is the standby state. combined state.

In this embodiment, as shown in Figure 9 and Figure 4, the lower fixed plate 110 is also provided with passing grooves (1101, 1102) through which the toggle levers (106, 107) respectively corresponding to the left and right driven wheels pass and move. ), the toggle lever moves in the through slot, and part of it passes through the slot to contact the corresponding control part of the operating mechanism, and drives the corresponding control part to move accordingly, thereby realizing the switching of the state.

The operating mechanism of the present utility model includes an energy storage linkage assembly. Figure 10 is a three-dimensional schematic diagram of the energy storage linkage assembly of the operating mechanism, and Figure 11 is an exploded schematic diagram of each component of the energy storage linkage assembly. The linkage assembly includes front and rear cheeks 201 and rear cheeks 202 that are side by side and fixedly connected by three connecting columns 209, and a main shaft seat wheel 203 is also arranged between the front and rear cheeks (201, 202), as shown in Fig. 12 and Fig. 13 They are the front view and perspective view of the main shaft seat wheel 203 respectively. As shown in the figure, the main shaft seat wheel 203 includes a cylindrical wheel body 2031, and a branch convex body is symmetrically extended obliquely upward on both sides of the wheel body 2031. (2032, 2032 '), the outer walls of the two ends of the wheel body 2031 are each provided with an inwardly retracting annular step, respectively stretching out the seat wheel holes (2014, 2024) provided by the front and rear cheek plates (201, 202), through the annular The cooperation between the step and the seat wheel hole makes the main shaft wheel seat 203 limited between the front and rear cheek plates and can rotate around the axis of the wheel body 2031. The wheel body 2031 also has a main shaft hole 2031' along the axis for assembling the main shaft 5. The two branch convex bodies (2032, 2032') each have a connecting rod pin hole (2033, 2033'), and the center of the main shaft hole 2031' and the two connecting rod pin holes (2033, 2033') are in the same shape. Arranged in a waist triangle, the hole center of the main shaft hole 2031' is located at the corner point.

The two branch protrusions (2032, 2032') are respectively connected to a group of connecting rod energy storage units, as shown in Figure 11 and Figure 14, each group of connecting rod energy storage units includes a pair of lower connecting rods 204, a pair of upper connecting rods Rod 205, energy storage spring 206 and closing lever 207, each pair of lower connecting rods 204 are relatively fixed together through connecting plate 2041, and one end of lower connecting rod 204 passes through lower pin rod 2041 and a branch convex body of main shaft seat wheel 203 (Taking 2032 as an example) the cooperation of the connecting rod pin hole 2033 is hinged together, and the other end of the lower connecting rod 204 is provided with a racetrack-shaped long pin hole 2042, and the length direction of the long pin hole 2042 points to the lower pin rod 2041 (or is the connecting rod pin hole 2033), and one end of each pair of upper connecting rods 205 is relatively fixed together through the upper pin rod 2051 between them, and the upper pin rod 2051 also passes through the long pin hole 2042 of the lower connecting rod, because the long pin hole The longitudinal direction of 2042 points to lower pin 2041, so that upper pin 2051 can move along its lengthwise direction in long pin hole 2042, so that the hinge point of upper link 205 and lower link 204 (i.e. represented by upper pin 2051 , referred to as "middle hinge point") and the hinge point between the lower link 204 and the main shaft seat wheel 203 (represented by the lower pin rod 2041, referred to as the "lower hinge point") is not fixed, that is, the middle hinge point The distance between the hinge point and the lower hinge point will produce stretching and contraction changes; in addition, the other ends of each pair of upper links 205 pass through the upper hinge points (2015, 2025) fixed on the front and rear cheek plates (201, 202) respectively. Finger) is hinged with the front and rear cheek plates (201, 202);

The position of the upper hinge point (indicated by 2015 and 2025) relative to the entire energy storage unit is fixed, and the position of the axis of the wheel body 2031 of the main shaft seat wheel 203 relative to the entire energy storage unit is also fixed. Therefore, the upper The distance between the hinge point and the axis of the wheel body 2031 of the main shaft seat wheel 203 is fixed;

The distance between the middle hinge point (2051) and the upper hinge point is fixed, the middle hinge point can move around the upper hinge point, and the middle hinge point can also move around the lower hinge point (2041). The lower hinge point can be moved around the wheel body 2031 axis of the main shaft seat wheel 203, and the main shaft wheel seat 203 body between the lower hinge point and the wheel body 2031 axis can actually be regarded as a connecting rod (abbreviated as "the first link") Three-linkage"). Therefore, between the upper hinge point and the axis center of the wheel body 2031 of the main shaft seat wheel 203, three connecting rods are actually hinged in sequence: the upper connecting rod 205, the lower connecting rod 204, and the third connecting rod. The design of the long pin hole 2042 of the rod 204 makes the distance between the middle hinge point and the lower hinge point variable, so that the middle and lower hinge points have the ability to move between the upper hinge point and the main shaft seat wheel 203 under the action of external force. The two sides of the line between the axes of the wheel body 2031 move back and forth, while the closing lever 207 and the energy storage spring 206 not only serve as the transmitter of the external force, but also play a role in moving to a certain side. The role of maintaining state 2.

As shown in Figures 10 and 11, each closing lever (207, 207', shown in 207 as an example) includes two lever pieces (2071, 2072) that are arranged side by side and have the same shape, and the lever pieces (2071, 2072 ) is hinged with the front and rear cheeks through the closing hinge points (shown in 2013 of Fig. 11 ) respectively fixed on the front and rear cheeks (201, 202), and the same levers (2071, 2072) Two lever pieces (2071, 2072) are fixed together by a connecting plate 2073 between one free end of the two lever pieces (2071, 2072), and the outward surface of the other free end of the two lever pieces (2071, 2072) is respectively fixed There is a pin 2076; one end of the energy storage spring 206 (a set of two in this embodiment) is connected to the upper pin 2051 (i.e. the middle hinge point), and the other end is hinged to the closing lever 207 through a spring pin 208. Connecting piece 2073 place; The middle part of two lever pieces (2071,2072) all stretches toward its top and has projection, is fixed with a catch piece 2074 between the raised top of two lever pieces, also has a length direction perpendicular to on the stop piece 2074 The toggle holes 2075 of the two lever pieces, and the toggle levers (1061, 1071) of the left and right driven wheels (106, 107) of the manual operating mechanism 1 stretch into the corresponding toggle holes respectively, and the driven wheels rotate. Lever—cooperating with the toggle hole drives the corresponding closing lever to rotate around its hinged closing hinge point.

Figure 15 mainly shows the comparative schematic diagrams of the energy storage linkage assembly of the operating mechanism in the three states of double separation (A), main closure (B) and standby closure (C). Sectional view taken between the cheeks, states B and C with the front cheeks removed.

As shown in Figure 15, the closing hinge point 2013 is located between the upper hinge point 2025 and the main shaft seat wheel 203 , and the upper hinge point 2025 is located between the spring pin rod 208 and the closing hinge point 2013 (it should be noted that some of the above components "Located between ... and ..." is not limited to the line between ... and ..., but can be located on the side of the line, that is, the vertical projection of a component relative to the line It just needs to fall on the connection line.), in conjunction with the above-mentioned layout relationship of each hinge point, connecting rod and other positions and the effect of the energy storage spring, the linkage conversion of the three states shown in Figure 15 can be realized:

State A in the figure is a double-off position state, the two closing levers are in the opening position (that is, the closing lever is lifted), and the free ends of the upper connecting rods 205 on the left and right sides (with the upper pin rod 2051 in the figure being hinged in the middle) point) is subjected to the tension of the energy storage spring 206, and is lifted up around 2025, and the upper link upper limit is also symmetrically provided on the corresponding positions on the front and rear cheek plates (as shown in 2011, 2011', 2021 in Figure 11 , 2021'), so that the upper link is stabilized at the upper limit position of the upper link, and then through the two lower links, the main shaft seat wheel 203 is stabilized at the middle horizontal position, thereby realizing the middle double-point position of the whole mechanism .

State B in the figure is the main closing state, and the transition from state A to state B is: when the closing lever 207 on the left is moved from the double position to the closing position by external force (the right side remains at the double position), it will Across the dead center position of the energy storage spring 206 (i.e. the position on the line between 2025 and 2013), the free end of the upper link 205 on the left will be released from the upper limit of the link under the tension of the energy storage spring 206. Move downward around 2025, in order to maintain and limit, the front and rear cheek plates are also symmetrically provided with the lower limit of the upper link at the corresponding position (as indicated by 2012, 2012', 2022, 2022' in Figure 11), that is The upper link can be moved to the position of the lower limit of the upper link at most. And simultaneously drive the lower connecting rod and the main shaft seat wheel 203 to rotate counterclockwise at a certain angle. Ultimately, the middle hinge point between the left lower link and the left upper link forms a rigid support structure past dead center. During this process, because the long pin hole 2042 of the lower link provides a free margin, the closing lever 207' on the right side is not subjected to external force, so the upper link and the closing lever on the right side will remain motionless. The main shaft 5 rotates counterclockwise at a certain angle under the drive of the main shaft seat wheel 203, drives the compound contact mechanism 6 to act, and connects the main power supply.

State C in the figure is the ready state. If you are in state B, switch to state C, and you need to go through state A in the middle, that is, you need to lift the previously pressed closing lever to release the connection with the original power supply. Another power source can be switched on. Similarly, when in state C, switching to state B also needs to go through state A. Take the transition from state B to state C as an example:

State B-State A: When the closing lever on the left is moved from the closing position to the double position by external force (the right side remains at the double position), it drives the energy storage spring to store energy, and then the upper link on the left 205 will return from the lower limit of the connecting rod to the upper limit of the connecting rod under the pulling force of the release of energy after the energy storage spring 206 crosses the dead point; and at the same time drive the lower connecting rod and the main shaft seat wheel 203 to rotate clockwise to return to the horizontal state, that is, return Go to the two-point position (state A), and maintain the balance state of the horizontal position under the joint action of the upper link on the right side and the energy storage spring. During this process, the upper link and closing lever on the right remain stationary. The main shaft seat wheel 203 drives the main shaft 5, and the main shaft 5 drives the compound contact mechanism 6 to act, and is in a double split state.

State A-State C: Same as the conversion principle of the aforementioned state A-state B, the closing lever on the right is moved from the double position to the closing position by the external force (the left side remains at the double position), driving the energy storage Spring energy storage, when the energy storage spring is released, the upper link on the right side will move from the upper limit of the connecting rod to the lower limit of the connecting rod under the pulling force of the energy storage spring. And drive the lower connecting rod and the main shaft seat wheel 203 to rotate a certain angle clockwise. Ultimately, the lower link forms a rigid support structure with the upper link on the right past dead center. During this process, the left upper link and closing lever remain stationary. Similarly, the main shaft seat wheel 203 drives the main shaft 5, and the main shaft 5 drives the compound contact mechanism 6 to act, and connects the backup power supply.

The above-mentioned energy storage linkage assembly of the operating mechanism can directly realize the conversion of the three states by manually lifting and pressing the closing lever, or it can be installed above it as shown in Figure 3 to Figure 9 The manual operating mechanism 1 drives a certain driven wheel (106 or 107) to rotate by rotating the handle 101, and the toggle hole (2075) of the closing lever (1061 or 1071) and the toggle lever (1061 or 1071) under the driven wheel are inserted into the driven wheel. Refers to) cooperation, so as to drive the corresponding closing lever to lift or press down, and realize the conversion of the three states.

In addition, the utility model also provides a solution for realizing three state transitions through electric control, that is, an electric control assembly of the operating mechanism is also provided, as shown in Fig. 16 to Fig. 21 , the electric control assembly includes: The main closing electromagnet switch 210, the spare closing electromagnet switch 210', the double split electromagnet switch 211, the main closing connecting rod 2102, the spare closing connecting rod, the double split connecting rod 2112, the double split lever 212 and the double split pull bar 213;

When the electromagnet switch is powered on, its iron core retracts, and resets after power off;

The iron cores of the main closing electromagnet switch 210 and the standby closing electromagnet switch 210' face upward and are respectively fixed between the front and rear cheek plates through the connecting plate, and are respectively located under the side of a group of connecting rod energy storage units. It can also be said that they are respectively located under the side of a closing lever (207, 207'), mainly because the iron core retracts when the electromagnet switch is energized to provide power for the respective closing levers to press down. The specific implementation structure is: the iron cores of the main closing electromagnet switch 210 and the standby closing electromagnet switch 210' are respectively corresponding to one end of the hinged main closing connecting rod 2102 and the standby closing connecting rod 2102', the main closing connecting rod 2102, the standby closing connecting rod 2102 The other ends of the rods 2102' are each provided with a track-shaped long hole (21021, 21021') whose length direction points to the hinge of the connecting rod and the iron core, and the spring pin rod 208 hinged by the closing lever and the energy storage spring is inserted into the long hole , and can move relatively in the long hole along the length direction of the long hole;

The double-point electromagnet switch 211 is fixed on the front of the front cheek plate 201 with the iron core facing down. One end of the hinge;

Described two-part tie rod 213 comprises base plate 2131, each vertically upwardly extending a vertical plate (2132) on the front and rear sides of base plate 2131, respectively extending downwards a hinged plate 21311 on both sides of base plate 2131 middle part, each hinged plate 21311 opens There is a track-shaped hinged hole 21312 whose length direction is parallel to the bottom plate;

The front and rear cheek plates (201, 202) are respectively provided with a lifting opening below the main shaft 5, and the bottom plate 2131 of the double-divided pull rod 213 passes through the lifting openings of the front and rear cheek plates respectively, and the front and rear cheek plates (201 , 202) between the vertical plates 2132 on the front and rear sides of the double-point pull rod 213, the middle part of the vertical plate 2132 has a long hole 21321 for the main shaft 5 to pass through, and the length direction of the long hole 21321 is parallel to the lifting direction of the double-point pull rod , to avoid contact with the main shaft when the double-point pull rod is lifted; the front and rear cheek plates are also provided with a guide post 2016 above the main shaft, and the vertical plates 2132 on the front and rear sides of the double-point pull rod 213 are provided with guide posts 2016 Matching guide groove 21323;

The middle part of the double split lever 212 is hinged to the lower part of the lifting opening of the front cheek plate 201 below the main shaft 5 through the hinge shaft 2121, and is positioned at the bottom of the base plate 2131, and the other end of the double split lever 212 passes through the double split pull rod 213 through a hinge shaft The hinged hole 21312 of the bottom plate, and the hinged shaft can move along the length direction of the hinged hole in the hinged hole 21312 (this structure makes the double-split pull rod 213 move up and down under the drive of the double-split lever 212, the lifting path will not occur forward and backward offset); the front has introduced each closing lever (207,207 ') on the outward sheet body surface of the other free end of the same direction of the two lever sheets (2071,2072) of each closing lever (207,207 '). There is a pin post 2076, and the tops of the side risers 2132 on the front and rear sides of the double-point pull rod 213 protrude to the left and right outer sides and are provided with a hooking protrusion 21322 corresponding to the pin post 2076. When the double-point pull rod 213 is pulled, it moves downward. At this time, the hook protrusion 21322 hooks the pin post 2076, and drives the two closing levers to lift up.

In the following, with reference to Fig. 16 to Fig. 21 and Fig. 22, it will be introduced how the electric control assembly of the operating mechanism realizes the conversion of the three states through electric control.

Double split state: the iron cores of each electromagnet switch are in the released state. The main shaft 5 is balanced in a horizontal position (double position) under the action of the main shaft seat wheel 203 and the lower link-upper link-energy storage spring on both sides.

Switching from main closing or standby closing state to double opening state (closing -> opening): when in any closing position, the double opening electromagnet switch is energized (the other two electromagnet switches are not energized), and the double opening solenoid switch is powered on. The iron core of the sub-electromagnet switch is sucked and retracted, and the double-divided lever 212 is pulled by the double-divided connecting rod 2112 to rotate around the hinged fulcrum (hinge shaft 2121) of the middle part and the front cheek plate, thereby driving the double-divided pull rod 213 to move downward. Then the hook protrusion 21322 of the double-point pull rod 213 can catch the pin 2076 of the closing lever and move downwards, so that the closing lever moves from the closing position to the opening position, and the closing lever passes through the toggle hole 2075 and from The cooperation of the toggle lever of the driving wheel drives the driven wheel to rotate so as to drive the handle to rotate to the double position, and store energy for the energy storage spring. Then the energy storage spring is released, and the upper link is pulled to move from the lower limit of the connecting rod to the upper limit of the connecting rod. Then under the reaction force of the upper connecting rod and the energy storage spring on the other side, it is stable in a horizontal state. Complete the closing-double opening process from either side.

Switching from the double-opening state A to the main closing or standby closing state (B or C) (opening -> closing): the double-opening solenoid switch is not powered on, the main closing or standby closing solenoid switch is powered on, and the corresponding iron The core is closed and retracted, and the closing lever on the corresponding side is pulled to move from the double-point position to the closing position. The closing lever simultaneously moves the handle to rotate from the double-point indicating position to the closing indicating position, and at the same time drives the energy storage spring to store energy. Subsequently, the energy storage spring is released, and the upper connecting rod on the corresponding side is pulled to move from the upper limit of the connecting rod to the lower limit of the connecting rod. And drive the lower connecting rod and the main shaft seat wheel 203 to rotate a certain angle counterclockwise or clockwise. The main shaft rotates from the horizontal direction to the closing position along with the main shaft seat wheel 203, and finally stabilizes on the closing position. At this time, a rigid support structure will be formed between the lower link and the upper link on the corresponding side. During this process, the upper link and closing lever on the other side remain stationary. The mechanism completes the electric action conversion from double opening to main closing or backup closing.

It should be noted that after the electric action conversion from double opening to main closing or standby closing is completed, even if the main closing or standby closing electromagnet switch is not powered again, that is, the corresponding iron core springs up, due to its hinged connection. There are racetrack-shaped long holes (21021, 21021') at the other end of the rod 2102, and the depressed closing lever will not be lifted due to the rising of the connecting rod 2102.

In addition, according to the requirements of GB14048.1, low-voltage switching electrical equipment cannot indicate the disconnection position of the electrical equipment in any way after the contacts are welded. Head welding, although the main shaft and the main shaft seat wheel 203 cannot rotate due to contact welding, but the closing lever on the other side is forced down by external force, and the closing lever on this side may be forced to turn to the opening position. And keep in the opening position, showing the wrong opening index. Therefore, the utility model also provides an improvement measure to prevent misoperation and indication after contact welding:

As shown in Figure 23 to Figure 25, the front and rear cheeks protrude from the main shaft 5 and are located between the lever pieces (2071 and 2071', 2072 and 2072') on the same side of the two closing levers and are in the same plane with them An eccentric limiting piece 214 is also fixedly set at the position of each lever piece, and the end of each lever plate is provided with a corresponding stopper (shown in 2076, 2076' in the figure) toward the eccentric limiting piece, and the eccentric limiting piece 214 When rotating with the main shaft 5, the eccentric limit piece can avoid the turning route of the stopper part of the closing lever on the closing side around the closing hinge point (2013 as an example), and at the same time block the turning of the closing lever on the other side. The overturning path of the stop.

As shown in the figure, after the eccentric limiting piece 214 and the stopper are added, the eccentric limiting piece 214 is in a horizontal position in the double-open state, which will not affect the closing action of the closing levers on both sides.

When either side is closed, the eccentric limiting plate will rotate with the main shaft. Due to the setting of the eccentric shape, after the rotation, one of the two right-angle parts (or other shapes) of the eccentric limiting plate 214 is just located at the other side. On the overturning route of the stop part, limited by the cooperation between the two stoppers (as indicated by D in Figure 24), the closing lever in the opening state will not be able to perform the closing action, thereby preventing the wrong operation from closing, and at the same time Also can not show wrong switch-on instruction accordingly.

On the basis of the above, the utility model provides another improvement aimed at the problem of inconvenient installation of the energy storage spring:

In the structure of the energy storage unit shown in Figure 10 and Figure 11, the installation method for the energy storage spring is usually to use a tool to forcibly pull the spring through the assembly position, and then pull out the through hole on the connecting plate 2073 while passing it through. The upper spring pins (208, 208') are fixed. If two (or more) springs are fixed at the same time, assembly will be more difficult. Simultaneously, due to the size and space limitation of the connecting plate 2073 passing through the hole of the closing lever, the tooling fixture is often unusable. In addition, because it is an energy storage spring, the stiffness is relatively high, and it will be more difficult to fix multiple springs at the same time. It can even be completed by the cooperation of multiple people at the same time.

One way to improve this problem is to install the energy storage spring in a free state with no load. Based on this idea, we change the limit structure of the front and rear cheek plates to the closing lever, that is: as shown in Figure 23, As shown in Figure 24 and Figure 26, a detachable stopper 215 is provided on the top between the front and rear cheeks between the two closing levers. When the stopper 215 is not installed, the closing lever rotates to touch the cheek At the top of the plate, the energy storage spring is in a no-load state. After installing the limit block 215, the limit block 215 is higher than the top of the cheek plate and its width meets the closing lever rotation to touch the side wall of the limit block 215. , its energy storage spring is under load.

As shown in Figure 27, at this time, due to the small width of the cheek plate top 20201 itself, when the closing lever rotates until it touches the top, the energy storage spring has no stress, and can be fixed through spring pins (208, 208') separately in turn Then, as shown in Figure 28, use tooling to spread the closing lever to both sides, put into the limit block 215 and fix it on the top of the cheek plate; as shown in Figure 29, after adding the limit block 215, the two closing levers The stored-energy spring of the lever remains under the proper initial loading force.

Features of this structure:

The installation is labor-saving and simple, and the production efficiency is improved. Since the energy storage springs are installed under the no-load state, multiple springs can be installed separately in sequence.

As shown in Figure 30, the position feedback assembly includes a frame body 40, and a shaft seat 41 installed in the frame body 40, a double position micro switch 422, a main position micro switch 421 and a backup position micro switch 422, The rotating shaft seat 41 is socketed with the main shaft through the main shaft sleeve hole 411 provided thereon, and can rotate with the main shaft. The closing microswitches 422 are respectively located above and on both sides of the shaft seat. When the main shaft rotates, the protrusions of the shaft seat 41 touch the contacts of the microswitches respectively, triggering the corresponding microswitches to display the corresponding status.

The contact mechanism is a mechanism that is directly connected to the power supply in the transfer switch electrical appliance. The contacts in the contact mechanism are divided into two types: moving contacts and static contacts according to whether they move. There are two types of plug-in type and knife-type plug-in type. The finger-type clap-type contacts can resist burning under the action of arc when closing or breaking the circuit, and have high making and breaking capabilities. However, due to the node current of such contacts The power is repulsion type, and the dynamic and thermal stability of the contacts are poor, and they will be repelled under the action of a relatively high short-term withstand current, so it is difficult to meet the requirements of the short-term withstand capacity stipulated in the standard. The electric power of the knife-type plug-in contact is suction type, its dynamic and thermal stability is high, and it can achieve a high short-term tolerance index. However, because this type of contact adopts a non-contact design, it is Such contacts cannot resist arc burning when the circuit is disconnected, and it is difficult to meet the requirements of high making and breaking capacity. Patent No. CN200710059760X discloses a contact unit of an automatic transfer switch. The moving contact group includes both finger-type clap-type moving contacts and knife-type plug-in moving contacts. The static contact group is equipped with two corresponding One finger-type snap-fit static contact and two knife-type plug-in static contacts not only utilize the advantages of the two types of contacts, but also effectively avoid the disadvantages. However, the contact unit of this structure also has disadvantages: 1. There are two knife-type plug-in static contacts, and the structure is relatively complicated, which increases the cost and the possibility of failure; 2. Two knife-type contacts are arranged on both sides of the moving contact group Type plug-in static contact and two finger-type snap-in static contacts, and a spring and bracket should be set between the knife-type plug-in static contact and finger-type snap-in static contact. Therefore, the remaining space for the moving contact The effective rotation angle range is relatively limited, and can only reach a maximum angle range of 90 degrees, which is not suitable for switching devices that require a double-open state in addition to the main close and standby close.

Therefore, the utility model also provides a contact mechanism to meet the requirements of switching electrical appliances in three states. The scheme is as follows: As shown in Figure 31,

The contact mechanism includes a plurality of contact units arranged side by side;

Each contact unit includes a housing 61, a moving contact group 62, a static contact group and two arc extinguishing chambers 64 placed in the housing 61;

On the shell 61 and the central part of the moving contact group 62, there are respectively through holes (as shown by 611 and 621 in the figure) for passing through the main shaft 5 (that is, the main shaft used for power transmission in the switching device), and the moving The contact group is set on the main shaft 5 through the passage hole 621 and can rotate with the rotation of the main shaft 5 in the housing 61;

Both sides of the central part of the moving contact group extend a moving contact plate part 624 outward in mirror image symmetry with the passing hole 621 as the center, and the moving contact plate parts on both sides are electrically connected to each other, and each moving contact The plate part 624 also includes a snap-fit contact 622 and an arc-shaped knife-shaped plug-in contact body 623 respectively fixed on both sides of its outer end, and the arc-shaped direction of each knife-shaped plug-in contact body 623 Take the passage hole 621 in the center as the center of the circle; because it is mirror image symmetry, the knife-type plug-in contact bodies 623 of the two movable contact plate parts 624 face the same direction, and the respective snap-in contacts 622 also face the other. one in the same direction.

The static contact group includes two finger-type snap-in static contacts (631, 632) and a knife-type plug-in static contact 633 respectively located on both sides of the center of the moving contact group; the knife-type plug-in static contact 633 The engaging portion 6331 for engaging with the knife-type plug-in contact body 623 is correspondingly arranged on the moving path of the knife-type plug-in contact body 623, and the respective contacts (6311) of the two finger-type clapping-type static contacts (631, 632) , 6321) facing the opposite direction and respectively corresponding to a snap-fit contact of the moving contact plate.

The two arc extinguishing chambers 64 are respectively located in the spaces between the two finger-type snap-in static contacts (631, 632) and the knife-type plug-in static contacts 633, and are respectively close to the corresponding finger-type snap-in static contacts (631, 632).

In the double split state shown in Figure 32, the moving contact group 62 is vertically placed in the housing 61, and does not contact with each static contact (631, 632, 633), so it is impossible to construct any circuit. Institutions are in a state of bipartisanship.

In the main closing state shown in Figure 33, the moving contact group 62 rotates clockwise until the clapping contact 622 of the moving contact plate portion 624 at one end of the moving contact group 62 and a finger-shaped contact of the static contact group The contact 6311 of the clapping type static contact 631 stops when it contacts, and the knife-shaped plug-in contact body 623 of the movable contact plate portion 624 at the other end of the movable contact group 7 is inserted into the knife-shaped plug-in contact body 623 joint portion 6331 And engage with each other, 631, the moving contact group 62 and 633 form a circuit, and the contact mechanism is in the main closing state.

In the ready state shown in Figure 34, the moving contact group 62 rotates in the counterclockwise direction until the clapping contact 622 of the moving contact plate portion 624 at the other end of the moving contact group 62 is connected to the other side of the static contact group. The contact 6321 of the finger-type clapping static contact 632 stops when it contacts, and the knife-type plug-in contact body 623 of the movable contact plate portion at one end of the movable contact group 7 is inserted into the knife-type plug-in contact body 623 in the junction 6331 And engage with each other, 632, the moving contact group 62 and 633 form another circuit, and the contact mechanism is in the ready state.

As can be seen from the figure, no matter whether the movable contact group rotates clockwise or counterclockwise, when closing, the clapping contact 622 of the movable contact group is first disconnected from the electrical connection, and the knife-shaped plug-in contact 623 is separated later, and the closing is performed. When engaging, the knife-shaped plug-in contact body 623 of the moving contact group is first engaged with the static contact group, and the clap-type contact 622 of the movable contact group is then engaged with the finger-type clap-type static contact of the static contact group , this structure can effectively reduce the node electromotive force brought by the double snap-in structure, thereby reducing the operating force requirement of the main operating mechanism; The load is closed, effectively reducing the electrical wear of the contacts during the closing process. In the same way, during the disconnection process of the system, one end of the plug-in contact lags behind the disconnection of the snap-on contact end, so as to realize no-load disconnection and effectively reduce the electrical wear of the contacts during the disconnection process. In addition, two finger-type clap-type static contacts (631, 632) and a knife-type plug-in type static contact 633 are respectively located on both sides of the center of the moving contact group, so that the rotation angle of the moving contact group is further expanded, close to 180 degrees, it is more suitable for switching appliances for three-state transitions with double-open states in addition to main close and standby close.

In addition, during the transition process of the contact mechanism from the closed state to the open state, the moving contact set 62 needs to rotate counterclockwise or clockwise. The electric arc will inevitably be generated between the contacts (6311 or 6321) of the clapping type static contact (631 or 632), and the arc striking direction of the arc extinguishing chamber 64 will be sprayed onto the inner wall of the casing 61. Therefore, the utility model also An iron baffle 65 is added between the arc extinguishing chamber and the inner wall of the casing 61 to prevent the arc from being directly sprayed onto the inner wall of the casing 61. Furthermore, a screen perpendicular to the length direction of the baffle 65 is also provided correspondingly. The net 66 and the baffle plate 65 also have the function of guiding the electric arc, so that the electric arc moves to the screen cloth 66 .

In addition, due to the processing of the parts and the contacts of the snap-fit contact 622 of the moving contact group and the finger-type snap-fit contact (631 or 632) of the static contact group, some errors will inevitably occur during the welding process. , plus the error caused by the rigid connection between the main shaft and the moving contact group, etc., after the accumulation of various errors, the snap-fit contact 622 of the moving contact will come into contact with the contact point of the static contact due to the above-mentioned accumulated error The resulting point contact phenomenon, rather than the best surface contact, therefore, the utility model also made further improvements to the moving contact group,

As shown in Figure 31 and Figure 35, Figure 36, and Figure 37, the moving contact group includes: a central part and a moving contact,

The central part includes a central part shell formed by butting two circular front and rear half shells (6212, 6212') and fixing them together through bolts 6261 and nuts 6262. The circumference of the central part shell There is a moving contact plate portion passing hole symmetrically with the center of the housing (in the embodiment shown in Figure 35, each moving contact plate portion passing hole then passes through the half hole that is respectively opened on each half shell (62121, 62121') formed after docking), the center of the central shell is provided with a through hole 621 for passing through the main shaft 5 (that is, the main shaft used for power transmission in the switchgear) and sleeved on the main shaft, and through the hole The size and shape of 621 match the size and shape of the cross-section of the main shaft to ensure that the wall of the through hole fits closely with the periphery of the main shaft 5, and the main shaft directly passes through the through hole to drive the central shell to rotate accordingly.

The moving contacts include:

The central connection plate 625 clamped in the central part housing (between the front and rear half shells), the center of the central connection plate 625 is provided with a through hole 6251 (as shown in Figure 36 ) for the main shaft 5 to pass through, and There is a gap between the through hole 6251 and the main shaft 5 (that is, the main shaft 5 does not directly pass through the through hole 6251 to drive the movable contact to rotate);

It also includes a movable contact plate portion 624 protruding outward through a hole on both sides of the central connecting plate 625, and the movable contact plate portion on both sides passes through the center housing. The central connection plate 625 realizes the electrical conduction between each other, and each movable contact plate part 624 also includes a snap-fit contact 622 and an arc-shaped knife-shaped plug-in contact 623 respectively fixed on both sides of its outer end. , and the snap-fit contacts 622 of the two moving contact plate portions 624 are all facing the same direction.

There is a gap between the moving contact plate part 624 and the moving contact plate part passing hole.

Since the central shell is directly socketed with the main shaft through the hole 621, the (single-layer) movable contact is not directly socketed with the main shaft, and the through hole 6251 of the central connecting plate 625 of the movable contact is only used for the main shaft to pass through. , the center connecting plate 625 of the moving contact is sandwiched between the front and rear shells of the center shell, that is, the center shell drives the moving contact to rotate, and the moving contact plate of the moving contact There is a gap between 624 and the passage hole of the movable contact plate part of the central housing, therefore, when the clapping contact 622 of the movable contact touches the contact of the finger-type clapping static contact (631 or 632) When point (6311 or 6321), the moving contact can be adjusted within a certain range, so that its contact and the contact of the static contact can achieve better surface contact.

On this basis, the utility model also provides a further improvement. An elastic device is added in the central part of the housing, that is, the same number, Symmetrically arranged spring abutment parts, each spring abutment part correspondingly accommodates and abuts against the bottom of a vertically upward spring 627 of the same specification and length, and the top of each spring 627 abuts against the corresponding set in the center housing. Arrive at 629 at the top.

Figure 38 shows an embodiment of adding an elastic device. The central connecting plate 625 of the movable contact is located on both sides of the through hole 6251, and the connecting pins 6282 pass through the connecting holes on the central connecting plate 625 respectively. 6283 fixes a U-shaped spring sleeve 628 on the central connection plate, and the two vertical arms of each U-shaped spring sleeve are respectively located on the front and rear sides of the central connection plate, and each of them is provided with a spring receiving groove 6281 as a spring contact part Each spring abutting portion correspondingly accommodates and abuts against the bottom of a vertically upward spring 627 of the same specification and length, and the top of each spring 627 abuts against a corresponding abutting portion 629 provided in the central housing.

Figure 40 shows another embodiment of adding an elastic device. As shown in the figure, the central connection plate 625 of the movable contact is located on the plates on both sides of the hole 6251, and each side opens upwards. There are two spring receiving notches (6252, 6253), and each spring receiving notch (6252, 6253) acts as a spring abutment part, each spring abutment part correspondingly accommodates and abuts a vertically upward equivalent The bottoms of the springs 627 of specifications and lengths, and the tops of each spring 627 respectively abut against the corresponding abutting parts 629 in the housing of the central part.

Figure 41 is a principle analysis diagram of how the spring device cooperates with other parts to ensure the contact pressure

Referring to the accompanying drawing 41, it can be seen that under the action of the external force F, the fulcrum X is close to the clapping contact 622 of the left movable contact, and the right side of the contact moves upward, and the spring is compressed accordingly, providing a downward reaction force to Ensure the contact pressure to maintain better surface contact between the moving contact and the static contact.

The movable contact of the above-mentioned movable contact group is a single piece. When it is necessary to pass a large current, the thickness of the movable contact is simply thickened. Although the movable contact itself can meet the requirements for passing a large current, due to As the thickness increases, the problem of point contact between the snap-fit contact of the moving contact and the static contact will become more prominent, and it cannot be solved well only by the above-mentioned gap adjustment. Therefore, the utility model also provides another A structural form, that is, a double-piece moving contact group:

As shown in Figures 42 to 46, the double-piece moving contact set includes:

The central part and two moving contacts 620 with the same shape,

The central part includes a central part shell formed by butting two circular front and rear half shells (6212, 6212') and fixing them together through bolts 6261 and nuts 6262. The circumference of the central part shell There is a moving contact plate portion passing hole symmetrically with the center of the housing (in the embodiment shown in Figure 35, each moving contact plate portion passing hole then passes through the half hole that is respectively opened on each half shell (62121, 62121') formed after docking), the center of the central shell is provided with a through hole 621 for passing through the main shaft 5 (that is, the main shaft used for power transmission in the switchgear) and sleeved on the main shaft, and through the hole The size and shape of 621 match the size and shape of the cross-section of the main shaft to ensure that the wall of the through hole fits closely with the periphery of the main shaft 5, and the main shaft directly passes through the through hole to drive the central shell to rotate accordingly.

Each moving contact 620 includes:

The central connection plate 625 clamped in the central part housing (between the front and rear half shells), the center of the central connection plate 625 is provided with a through hole 6251 (as shown in Figure 36 ) for the main shaft 5 to pass through, and There is a gap between the through hole 6251 and the main shaft 5 (that is, the main shaft 5 does not directly pass through the through hole 6251 to drive the movable contact to rotate);

It also includes a movable contact plate portion 624 protruding outward through a hole on both sides of the central connecting plate 625, and the movable contact plate portion on both sides passes through the center housing. The central connection plate 625 realizes the electrical conduction between each other, and each movable contact plate part 624 also includes a snap-fit contact 622 and an arc-shaped knife-shaped plug-in contact 623 respectively fixed on both sides of its outer end. , the arc-shaped direction of each knife-type plug-in contact (623) is centered on the through hole of the central connecting plate to which it belongs, and the clapping contacts of the two moving contact plates are all facing the same direction , snap-in contacts are all facing the same direction.

There is a gap between the moving contact plate part 624 and the moving contact plate part through the hole;

A partition 629 made of insulating material is sandwiched between the two moving contacts 620. The partition 629 is shaped like the moving contact 620, and the partition 629 is also provided with a contact for the main shaft 5 to pass through. The shape of the through hole 6251 of the head center connecting plate 625 and the corresponding position of the through hole 6291 are the same.

As shown in Figure 42, Figure 44 to Figure 46, in order to ensure better synchronous rotation of the two movable contacts and the partition 629, each movable contact 620 has a synchronous hole 6252 on both sides of the hole 6251. , the front and rear sides of the partition are correspondingly provided with synchronous shafts 6292 for extending into the corresponding synchronous holes 6252 .

At the same time, a spring device is added to the double-piece moving contact group. The structure of the spring device is more suitable for setting up spring receiving notches (6252, 6253) on each piece of moving contact as shown in Figure 40 to act as a spring support. The form of the connecting part will not be repeated in this part.

The double-piece moving contact group is adopted. Since there are two moving contact conductors, it can not only play an effective shunt role, but even if the two moving contacts move synchronously, there will inevitably be a gap between the two moving contacts. In addition to the existence of other gaps, the space for adjustment has also increased, and the point contact risk existing in one piece is distributed to two pieces, which effectively reduces the errors caused by the processing of parts and the welding process of silver points and conductors. Resulting in the risk of point-of-contact.

The utility model also provides a new structure of knife-type plug-in static contacts of two static contact groups, one is a single-piece type, and the other is a double-piece type.

As shown in Figure 47 to Figure 51, it is a one-piece knife-type plug-in static contact, including a copper bar 6332, a U-shaped connecting plate 6333 and a bracket 6334;

The U-shaped connecting plate 6333 includes a bottom 63331 and vertical plates on both sides, the bottom 63331 is fixed and electrically connected to the copper bar 6332, and the vertical plates on both sides are an inclined section 63332 and a vertical section 63333 from the bottom 63331 upward;

The bracket 6334 includes two connecting parts 63342 parallel to each other with an insertion gap between them, and a side plate 63341 located on the same side of the two connecting parts and fixing the two connecting parts together. The side plate 63341 and the two connecting parts 63342 are perpendicular to each other, and the insertion gap is for inserting the knife-type plug-in contact body of the movable contact. Each connecting part 63342 has a vertical plate parallel to the insertion gap for the U-shaped connecting plate to extend from bottom to top and The vertical plate placement slots accommodated therein, each connecting portion 63342 also has a roller slot hole 633421 which is perpendicular to and penetrates the vertical plate placement slots, and the vertical section 63333 of a vertical plate of the U-shaped connecting plate Through the roller slot 633421, a roller 6335 is arranged in the roller slot 633421 on the side of the vertical section 63333 facing the other connecting part to abut against the vertical section, and the roller slot on the other side of the vertical section There is a spring 6336 and a fixed end cover 6337 in the hole 633421, and the opening height of the roller slot hole 633421 toward the other side of the connection part is slightly smaller than the diameter of the roller 6335, and the roller can be pushed by the spring 6336 A part can be exposed outside the opening, and the distance between the two opposite rollers on the two connecting parts is slightly smaller than the thickness of the knife-type plug-in contact body of the moving contact.

In order to make the knife-type plug-in contact body reduce the contact interference of other parts between the connecting parts when it is inserted into the insertion gap between the two connecting parts, so that the contact body can be inserted more smoothly and the contact with the roller is more direct. The inner wall of the connecting part at the opening of the roller slot hole also protrudes outwards to form a convex body 633422 .

As shown in Figure 47, in order to make the movement of the roller along the roller slot more smooth, roller columns 63351 are protruding from both ends of the roller, and matching slideways are provided on both sides of the roller slot 633421 Groove 633422.

As shown in Figure 51, the distance between the two rollers of the single-piece knife-type plug-in static contact after assembly is slightly smaller than the thickness of the knife-type plug-in contact body of the matching moving contact. When the plug-in contact body 623 is inserted into the insertion gap of the static contact from above or below, the side wall of the knife-shaped plug-in contact body 623 presses the roller 6335 to move to both sides, and the roller 6335 acts on the U-shaped connection. The vertical plate of the plate (the vertical section 63333 of the vertical plate in this embodiment) is elastically deformed outward, and the spring 6336 is compressed thereupon to provide an inward reaction force to ensure the contact pressure between the contact body and the roller.

As shown in Figure 52 to Figure 56, it is a double-piece knife-type plug-in static contact, including a copper bar 6332, a U-shaped connecting plate 6333, a second U-shaped connecting plate 6333' and a bracket 6334;

The U-shaped connecting plate 6333 includes a bottom 63331 and vertical plates on both sides, the bottom 63331 is fixed and electrically connected to the copper bar 6332, and the vertical plates on both sides are an inclined section 63332 and a vertical section 63333 from the bottom 63331 upward;

The second U-shaped connecting plate 6333' has the same bottom 63331' as the U-shaped connecting plate 6333, the inclined section 63332' and the vertical section 63333' of the two vertical plates, and the bottom 63331' of the second U-shaped connecting plate is connected with copper The rows are fixed and electrically connected and are located on the side of the bottom 63331 of the U-shaped connecting plate 6333. The two vertical plates of the second U-shaped connecting plate are respectively in the same plane as the vertical plates of the U-shaped connecting plate, and the second U-shaped connecting plate The top end of each vertical section 63333' of the connecting plate 6333' also extends laterally with a transverse section 63334' located above the corresponding vertical section 63333 of the U-shaped connecting plate 6333;

The bracket 6334 includes two connecting parts 63342 parallel to each other with an insertion gap between them, and a side plate 63341 located on the same side of the two connecting parts and fixing the two connecting parts together. The side plate 63341 and the two connecting parts 63342 are perpendicular to each other, and the insertion gap is for inserting the knife-type plug-in contact body of the movable contact. Each connecting part 63342 has a vertical hole for the U-shaped connecting plate and the second U-shaped connecting plate parallel to the insertion gap. The board extends from bottom to top and accommodates the vertical board placement groove, and each connecting part 63342 is also provided with a roller slot hole 633421 and a second roller shaft hole 633421 which are distributed up and down and are perpendicular to and penetrate through the vertical board placement groove. Shaft slot hole 633421';

The vertical section 63333 of a vertical plate of the U-shaped connecting plate 6333 passes through the roller groove 633421, and a roller 6335 is arranged in the roller groove 633421 facing the other connecting part side of the vertical section 63333 and vertical Sections are abutted against each other, and a spring 6336 and a fixed end cover 6337 are abutted in turn in the roller slot hole 633421 on the other side of the vertical section;

The transverse section 63334' of a vertical plate of the second U-shaped connecting plate 6333' passes through the second roller slot hole 633421', and the transverse section 63334' faces the second roller slot hole 633421' on the other side of the connecting part. There is also a roller 6335 abutting against the transverse section 63334', and a spring 6336 and a fixed end cover 6337 are also abutted in turn in the second roller slot 633421' on the other side of the transverse section 63334';

The height of the opening of the roller groove 633421 and the second roller groove 633421' towards the connecting part on the other side is slightly smaller than the diameter of the roller 6335 inside, and a part of the roller can be exposed under the thrust of the respective spring 6336 Outside the opening, and the distance between the two opposing rollers on the two connecting parts is slightly smaller than the thickness of the knife-type plug-in contact body of the moving contact.

In order to make the knife-type plug-in contact body reduce the contact interference of other parts between the connecting parts when it is inserted into the insertion gap between the two connecting parts, so that the contact body can be inserted more smoothly and the contact with the roller is more direct. The inner wall of the connection part where the opening of the first roller slot and the opening of the second roller slot also protrudes outwards to form a convex body 633422 .

As shown in Figure 47, in order to make the movement of the rollers along the roller slots more smooth, roller posts 63351 are protruding from both ends of the rollers, and the roller slots 633421 and the second roller slots 633421' are respectively There are also matching slideway grooves 633422 on the two side walls.

As shown in Figure 51, the distance between the two rollers of the double-piece knife-type plug-in static contact after assembly is slightly smaller than the thickness of the knife-type plug-in contact body of the moving contact that is matched with it. When the knife-type plug-in contact body 623 is inserted into the insertion gap of the static contact no matter from the top or the bottom direction, the side wall of the knife-type plug-in contact body 623 presses the roller 6335 to move to both sides, and the roller 6335 acts on the The vertical plate of the U-shaped connecting plate (the vertical section 63333 of the vertical plate in this embodiment) and the transverse section 63334' of the second U-shaped connecting plate each make it elastically deformed to the outside, and the corresponding spring 6336 is compressed thereupon, providing The inward reaction force is used to ensure the contact pressure between the contact body and the roller. At the same time, the two U-shaped connecting plates also play the role of effective shunting, and the two pieces of conductors are respectively provided with pressure by independent springs, which can ensure the reliability of the contact pressure.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (10)

1. can realize the contact mechanism of three kinds of state of switch electrical equipment, it is characterized in that: described contact mechanism comprises multiple contact units of arranging successively side by side;

Each contact unit comprises shell (61) and is placed in moving contact group (62) in shell (61), stationary contact head group and two arc control device (64);

The central part of the upper and moving contact group (62) of shell (61) respectively has for the passing hole through main shaft (5), and moving contact group is set in main shaft (5) by the passing hole (621) on it goes up and can rotate with the rotation of main shaft (5) in shell (61);

Both sides specular centered by passing hole (621) of the central part of described moving contact group is each outwards stretches out a moving contact plate portion (624), the moving contact plate portion of both sides conducts to each other, the clapper-type contact (622) that the both sides that each moving contact plate portion (624) is also included in its outer end set firmly respectively and the blade type plug-in type contact (623) of an arc, and the arc of each blade type plug-in type contact (623) trend is for the center of circle with the passing hole of central part (621); Owing to being specular, so the blade type plug-in type contact (623) of two moving contact plate portions (624) is towards identical direction, respective clapper-type contact (622) is also all towards another identical direction;

Stationary contact head group comprises two the finger-type clapper-type fixed contacts (631,632) and a blade type plug-in type fixed contact (633) that lay respectively at moving contact group switching centre portion two side direction; Blade type plug-in type fixed contact (633) for the mobile route of being located at blade type plug-in type contact (623) corresponding to the junction surface (6331) that blade type plug-in type contact (623) engages, the clapper-type contact in an in the opposite direction and respectively corresponding moving contact plate portion, the respective contact (6311,6321) of two finger-type clapper-type fixed contacts (631,632).

2. contact mechanism according to claim 1, it is characterized in that, two arc control device (64) lay respectively in the space of two finger-type clapper-type fixed contacts (631,632) respectively and between blade type plug-in type fixed contact 633, and respectively near corresponding finger-type clapper-type fixed contact (631,632).

3. contact mechanism according to claim 1, is characterized in that, adds the baffle plate (65) having irony between arc control device and shell (61) inwall, avoids electric arc to be directly injected on the inwall of shell (61); On the length direction of described baffle plate (65), also correspondence is provided with the perpendicular screen cloth of length direction (66), and electric arc can guide to screen cloth (66) mobile by baffle plate (65).

4. contact mechanism according to claim 1, is characterized in that, described moving contact group comprises: central part and moving contact;

Described central part comprise circular by two before, Rear housing half (6212, 6212 ') to dock and the central part housing of the formation be fixed together, the circumferential edge of central part housing respectively has a moving contact plate portion passing hole with casing center symmetry, the center of central part housing has for passing main shaft (5) and the passing hole (621) be set on main shaft, and the size shape of passing hole (621) and main shaft cross-sectional sizes mating shapes, guarantee that passing hole hole wall and main shaft (5) periphery fit, main shaft directly drives central part housing to rotate by passing hole thereupon,

Described moving contact comprises:

Be clipped on the center connecting plate (625) in central part housing, center connecting plate (625) center have for main shaft pass through hole (6251), and leave space through hole and main shaft;

Also comprise, lay respectively at the both sides of center connecting plate (625) separately through the outwardly directed moving contact plate portion (624) of a moving contact plate portion passing hole of central part housing, the moving contact plate portion of both sides realizes conducting to each other via the center connecting plate of centre, the clapper-type contact (622) that the both sides that each moving contact plate portion is also included in its outer end set firmly respectively and the blade type plug-in type contact (623) of an arc, and the clapper-type contact (622) of two moving contact plate portions (624) is all towards same direction;

Gap is left between moving contact plate portion (624) and moving contact plate portion passing hole.

5. contact mechanism according to claim 4, it is characterized in that, elastic device has been set up in central part housing, namely be positioned at the center connecting plate (625) of moving contact the spring abutment being arranged with equal number, symmetric arrays that it passes the both sides in hole (6251), each spring abutment correspondence is held and is abutted the bottom of spring (627) of an equivalent specifications vertically upward, length, and the top of each spring (627) is respectively connected to the top (629) of corresponding setting in central part housing.

6. contact mechanism according to claim 5, it is characterized in that, the both sides that it passes hole (6251) are positioned at the center connecting plate (625) of moving contact, through the connecting hole (6283) that center connecting plate (625) has, a U-shaped spring housing (628) is fixed on center connecting plate each via connecting pin (6282), two armstands of each U-shaped spring housing lay respectively at the forward and backward side of center connecting plate, and it are respectively provided with one as the spring-housing groove (6281) of spring abutment.

7. contact mechanism according to claim 5, it is characterized in that, be positioned on its plate body passing the both sides in hole (6251) at the center connecting plate (625) of moving contact, every side respectively has two spring-housing groove mouths (6252,6253) upward respectively, serves as described spring abutment separately by each spring-housing groove mouth (6252,6253).

8. contact mechanism according to claim 1, is characterized in that: described moving contact group is the moving contact group of double-disk, and it comprises:

The moving contact (620) that central part is identical with two plate shapes,

Described central part comprise circular by two before, Rear housing half (6212, 6212 ') to dock and the central part housing of the formation be fixed together, the circumferential edge of central part housing respectively has a moving contact plate portion passing hole with casing center symmetry, the center of central part housing has for passing main shaft and the passing hole (621) be set on main shaft, and the size shape of passing hole (621) and main shaft cross-sectional sizes mating shapes, guarantee that passing hole hole wall and main shaft (5) periphery fit, main shaft directly drives central part housing to rotate by passing hole thereupon,

Every sheet moving contact (620) comprising:

Be clipped on the center connecting plate in central part housing, center connecting plate center have for main shaft pass through hole, and leave space through hole and main shaft;

Also comprise, the both sides laying respectively at center connecting plate realize conducting to each other via the center connecting plate of centre through the moving contact plate portion of both sides, passing hole outwardly directed moving contact plate portion of moving contact plate portion of central part housing separately, the blade type plug-in type contact of the clapper-type contact that the both sides that each moving contact plate portion is also included in its outer end set firmly respectively and an arc, each blade type plug-in type contact (623) arc trend be with the center connecting plate belonging to it through hole for the center of circle, and the clapper-type contact in two moving contact plate portions is all towards same direction, clapper-type contact is then all towards another identical direction,

Gap is left between moving contact plate portion (624) and moving contact plate portion passing hole;

The dividing plate (629) be made up of isolation material is also clamped between two panels moving contact (620), dividing plate (629) and the profiling of moving contact shape, and dividing plate is also provided with pass for main shaft with contact center connecting plate (625) through hole (6251) shape and correspondence position identical through hole (6291).

9. contact mechanism according to claim 1, is characterized in that: described blade type plug-in type fixed contact is one chip, and it comprises copper bar (6332), U-shaped connecting plate (6333) and support (6334);

Described U-shaped connecting plate (6333) comprises the riser of bottom (63331) and both sides, bottom it, (63331) are fixedly electrically connected with copper bar (6332), and the riser of its both sides is upwards followed successively by tilting section (63332) and vertical section (63333) from bottom (63331);

Described support (6334) comprise two be parallel to each other side by side and between leave and insert the connecting portion (63342) in gap, and be positioned at two connecting portion the same sides and the side plate (63341) be fixed together by two connecting portions, side plate (63341) is perpendicular with two connecting portions (63342), described insertion gap is inserted for the blade type plug-in type contact of moving contact, each connecting portion (63342) respectively has a riser for U-shaped connecting plate paralleled with insertion gap and stretches into from bottom to top and riser mounting groove accommodated therein, each connecting portion (63342) also respectively has a roller bearing slotted eye (633421) perpendicular and through with described riser mounting groove, the vertical section (63333) of a riser of described U-shaped connecting plate is through this roller bearing slotted eye (633421), and in the roller bearing slotted eye (633421) of vertical section (63333) towards another connecting portion side, be provided with a roller bearing (6335) abut against with vertical section, then abut successively in the roller bearing slotted eye (633421) of vertical section opposite side and have a spring (6336) and fixing end cap (6337), and roller bearing slotted eye (633421) is slightly less than the diameter of roller bearing (6335) towards the opening of opposite side connecting portion, and some can expose outside opening under the thrust of spring (6336) to make roller bearing, and the distance between two relative roller bearings on two connecting portions is slightly less than the thickness of the blade type plug-in type contact of moving contact.

10. contact mechanism according to claim 1, it is characterized in that: described blade type plug-in type fixed contact is double-disk, and it comprises copper bar (6332), U-shaped connecting plate (6333), the second U-shaped connecting plate (6333 ') and support (6334);

Described U-shaped connecting plate (6333) comprises the riser of bottom (63331) and both sides, bottom it, (63331) are fixedly electrically connected with copper bar (6332), and the riser of its both sides is upwards followed successively by tilting section (63332) and vertical section (63333) from bottom (63331);

Described second U-shaped connecting plate (6333 ') has the bottom (63331 ') identical with U-shaped connecting plate (6333), the tilting section (63332 ') of two risers and vertical section (63333 '), the bottom (63331 ') of the second U-shaped connecting plate is fixedly electrically connected with copper bar and is positioned at the side of the bottom (63331) of U-shaped connecting plate (6333), second U-shaped connecting plate two risers be in same plane with the plate face of the riser of U-shaped connecting plate respectively, and the top of each vertical section (63333 ') of the second U-shaped connecting plate (6333 ') also horizontal expansion have one be positioned at U-shaped connecting plate (6333) the vertical section of correspondence (63333) top traversing section (63334 '),

Described support comprise two be parallel to each other side by side and between leave and insert the connecting portion in gap, and be positioned at two connecting portion the same sides and the side plate be fixed together by two connecting portions, side plate and two connecting portions perpendicular, described insertion gap is inserted for the blade type plug-in type contact of moving contact, each connecting portion (63342) respectively has a riser for U-shaped connecting plate and the second U-shaped connecting plate paralleled with insertion gap and stretches into from bottom to top and riser mounting groove accommodated therein, each connecting portion also respectively have in distribute up and down and the roller bearing slotted eye (633421) perpendicular and through with described riser mounting groove and the second roller bearing slotted eye (633421 '),

The vertical section (63333) of a riser of described U-shaped connecting plate (6333) is through roller bearing slotted eye (633421), and be provided with a roller bearing (6335) to abut against with vertical section in the roller bearing slotted eye (633421) of vertical section (63333) towards another connecting portion side, then abutting successively in the roller bearing slotted eye of vertical section opposite side has a spring and fixing end cap;

The traversing section (63334 ') of a riser of described second U-shaped connecting plate (6333 ') is through the second roller bearing slotted eye (633421 '), and be also provided with a roller bearing and traversing section abuts against in the second roller bearing slotted eye of traversing section towards another connecting portion side, also abutting successively in the second roller bearing slotted eye of traversing section opposite side has a spring and fixing end cap;

Roller bearing slotted eye and the second roller bearing slotted eye are towards the diameter of the smaller roller bearing in the inner of open height of opposite side connecting portion, and some can expose outside opening under the thrust of respective spring to make roller bearing, and the distance between two relative roller bearings on two connecting portions is slightly less than the thickness of the blade type plug-in type contact of moving contact.