CN220306178U - Auxiliary contact lead-out structure of contactor - Google Patents

Abstract

The application relates to the field of electrical switches, in particular to an auxiliary contact lead-out structure of a contactor, which comprises a yoke plate and auxiliary components, wherein two first through holes are formed in the yoke plate in a penetrating mode, two auxiliary components are arranged, and the two auxiliary components are correspondingly arranged in the first through holes respectively; the auxiliary assembly comprises a transition piece, a contact pin and a leading-out end wire, wherein one end of the transition piece is fixedly connected to the yoke plate in a welding mode, the other end of the transition piece is arranged in a first through hole in a protruding mode along the thickness direction of the yoke plate, a second through hole is formed in the transition piece in a penetrating mode, the contact pin is fixedly connected to the inner wall of the second through hole through glass welding, and one end of the leading-out end wire is connected to the contact pin. The method has the effects of optimizing the size of the lead-out space of the auxiliary contact and improving the insulation performance between the high-voltage contact and the auxiliary contact.

Description

Auxiliary contact lead-out structure of contactor

Technical Field

The application relates to the field of electrical switches, in particular to an auxiliary contact lead-out structure of a contactor.

Background

A contactor is an electrical switching apparatus generally used to control the on-off of a current. The contactor is widely used for a switch for controlling a motor, a lamp, a heater, and the like, and thus an indication circuit for displaying an on state and an off state of the contactor is often connected.

In the related art, to facilitate the connection of the indication circuit, the contactor generally includes a main stationary contact, a yoke plate, a contact pin, an auxiliary reed, and a driving assembly. The two main fixed contacts are used for being connected with a high-voltage circuit which needs to control the on-off of current. The yoke plate is connected to the main fixed contact, the contact pins are two, and the two auxiliary components are respectively arranged at two ends of the yoke plate and are respectively close to two ends of the auxiliary reed. The power saving circuit board is used for installing the contact pins on the yoke plate, and the contact pins are connected with the internal power saving circuit board used for controlling the indicating circuit. When the contactor is in a communicating state, the driving assembly drives the auxiliary reed to be far away from the contact pin, and the circuit is indicated to be disconnected; when the contactor is in an off state, the driving assembly drives the auxiliary reed to abut against the contact pin, and the indication circuit is communicated.

With the related art described above, the insulation between the contact pins and the yoke plate is poor, which in turn results in poor insulation between the high voltage contacts and the auxiliary contacts.

Disclosure of Invention

In order to improve the insulation between a contact pin and a yoke plate and further improve the insulation performance between a high-voltage contact and an auxiliary contact, the application provides an auxiliary contact extraction structure of a contactor.

The application provides a contactor auxiliary contact draws forth structure adopts following technical scheme:

the auxiliary contact lead-out structure of the contactor comprises a yoke plate and auxiliary components, wherein two first through holes are formed in the yoke plate in a penetrating mode, two auxiliary components are arranged, and the two auxiliary components are correspondingly arranged in the first through holes respectively;

the auxiliary assembly comprises a transition piece, a contact pin and a leading-out end wire, wherein one end of the transition piece is fixedly connected to the yoke plate in a welding mode, the other end of the transition piece is arranged in a first through hole in a protruding mode along the thickness direction of the yoke plate, a second through hole is formed in the transition piece in a penetrating mode, the contact pin is fixedly connected to the inner wall of the second through hole through glass welding, and one end of the leading-out end wire is connected to the contact pin.

Through adopting above-mentioned technical scheme, the contact pin passes through glass welded fixed connection in the transition piece, and transition piece welded fixed connection is in yoke board, is favorable to reducing the emergence of the condition of contact pin direct contact yoke board to improve the insulating property between contact pin and the yoke board, and then improved the insulating properties between high-voltage contact and the auxiliary contact. In addition, one end of the transition piece is arranged on the first through hole in a protruding mode, the distance between the contact pin and the yoke plate is increased, and therefore the insulation performance between the high-voltage contact and the auxiliary contact is further improved.

Alternatively, the transition piece is resistance welded or laser welded to the yoke plate.

By adopting the technical scheme, the precision of resistance welding or laser welding is higher and the continuity of the welding seam is good, thereby being beneficial to ensuring the tightness of the joint between the transition piece and the yoke plate.

Optionally, the material of the transition piece is nickel-plated low-carbon steel or stainless steel.

By adopting the technical scheme, the nickel-plated low-carbon steel and stainless steel have higher strength, stronger durability and better processability, thereby being beneficial to prolonging the service life of the contactor and reducing the production cost of the contactor.

Optionally, a gap is arranged between the transition piece and the inner wall of the first through hole, and the gap is close to one end of the transition piece penetrating through the first through hole.

By adopting the technical scheme, the gap reduces the contact area between the transition piece and the yoke iron plate, is favorable for ensuring the insulativity, and further ensures the safety of the contactor.

Optionally, the yoke plate is arranged along a horizontal direction, one end of the transition piece is fixedly mounted at the top of the yoke plate, and the other end of the transition piece is arranged at the first through hole in a protruding manner along a vertical upward direction.

By adopting the technical scheme, the fragments generated by the instantaneous high temperature after the main fixed contact is contacted with the active reed are isolated by the transition piece, so that the fragments are difficult to accumulate and adhere to the outer peripheral surface of the contact pin, and the normal use of the contact pin is ensured.

Optionally, the yoke plate sets up along the horizontal direction, one end fixed mounting in the bottom of yoke plate of transition piece, the other end of transition piece is along vertical downward direction outstanding setting in first through-hole, the gap between contact pin and the first through-hole is filled with insulating glue.

By adopting the technical scheme, the insulation glue increases the stability of the connection part between the contact pin and the yoke plate on the premise of ensuring the insulation property between the contact pin and the yoke plate.

Optionally, an end of the outgoing terminal line remote from the contact pin is an internal energy-saving circuit board.

By adopting the technical scheme, the external indication circuit is directly connected to the outgoing terminal line, so that the connection relationship is simple, and the fault rate is reduced.

Optionally, the second through hole is elliptical.

Through adopting above-mentioned technical scheme, be oval second through-hole that sets up be convenient for when contact pin glass welded fixed connection is in the inner wall of second through-hole, adjust the mounted position of contact pin to be favorable to increasing the suitability of transition piece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the contact pin is fixedly connected to the transition piece through glass welding, and the transition piece is fixedly connected to the yoke plate through welding, so that the contact pin is beneficial to reducing the occurrence of the condition that the contact pin directly contacts the yoke plate, the insulativity between the contact pin and the yoke plate is improved, and the insulativity between the high-voltage contact and the auxiliary contact is further improved. In addition, one end of the transition piece is arranged on the first through hole in a protruding mode, the distance between the contact pin and the yoke plate is increased, and therefore the insulation performance between the high-voltage contact and the auxiliary contact is further improved.

2. The precision of resistance welding or laser welding is higher and the continuity of the welding seam is good, which is beneficial to ensuring the tightness of the joint between the transition piece and the yoke plate.

3. The nickel-plated low-carbon steel and stainless steel have higher strength, stronger durability and better processability, which is beneficial to prolonging the service life of the contactor and reducing the production cost of the contactor.

Drawings

Fig. 1 is a schematic overall structure of embodiment 1.

Fig. 2 is a cross-sectional view of the overall structure of embodiment 1.

Fig. 3 is a cross-sectional view of the overall structure of embodiment 2.

Fig. 4 is a cross-sectional view of the whole structure of embodiment 3.

Fig. 5 is a cross-sectional view of the whole structure of example 4.

Fig. 6 is a schematic overall structure of embodiment 5.

Reference numerals illustrate: 1. a housing; 2. a drive assembly; 21. a coil; 22. a sliding sleeve; 23. a movable iron core; 24. a stationary core; 25. a connecting rod; 251. an auxiliary reed; 252. a second return spring; 26. a first return spring; 3. a yoke plate; 31. a first through hole; 4. an auxiliary component; 41. a transition piece; 411. a second through hole; 42. a stylus; 43. leading out an end wire; 5. an active reed; 6. a main stationary contact; 7. a third return spring; 8. and (5) insulating glue.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses an auxiliary contact lead-out structure of a contactor.

Example 1.

Referring to fig. 1 and 2, the contactor auxiliary contact extraction structure includes a housing 1, a driving assembly 2, a yoke plate 3 auxiliary assembly 4, and a contact assembly.

Referring to fig. 2, the driving assembly 2 includes a coil 21, a sliding sleeve 22, a moving core 23, a stationary core 24, a connecting rod 25, and a first return spring 26. The coil 21 is installed in the shell 1 along the vertical direction, the sliding sleeve 22 is arranged in the coil 21, and the movable iron core 23 is arranged in the sliding sleeve 22 and is in sliding fit with the sliding sleeve 22 along the vertical direction. The static iron core 24 is located at the top of the movable iron core 23, and the static iron core 24 is fixedly mounted on the inner wall of the sliding sleeve 22. One end of the connecting rod 25 is in threaded fit with the movable iron core 23, and the other end of the connecting rod 25 penetrates through the static iron core 24 along the vertical direction and is in sliding fit with the static iron core 24. The first return spring 26 is sleeved on the connecting rod 25, and two ends of the first return spring 26 are fixedly mounted on the movable iron core 23 and the static iron core 24 respectively.

Referring to fig. 2, the yoke plate 3 is fixedly mounted to the housing 1, and the yoke plate 3 is disposed in the housing 1 in a horizontal direction. One end of the connecting rod 25 penetrating through the static iron core 24 penetrates through the yoke iron plate 3, and one end of the connecting rod 25 penetrating through the yoke iron plate 3 is fixedly provided with an auxiliary reed 251, and the auxiliary reed 251 is arranged along the horizontal direction. The yoke plate 3 is provided with two first through holes 31 penetrating in the vertical direction, and the two first through holes 31 are respectively provided near both ends of the auxiliary reed 251. The auxiliary assemblies 4 are two, the two auxiliary assemblies 4 are sealed in the shell 1, and the two auxiliary assemblies 4 are respectively and correspondingly arranged in the first through holes 31.

Referring to fig. 2, the auxiliary assembly 4 includes a transition piece 41, a contact pin 42, and a terminal wire 43. The material of the transition piece 41 may be nickel-plated low carbon steel or stainless steel, and in the embodiment of the present application, the material of the transition piece 41 is selected to be nickel-plated low carbon steel. The transition piece 41 has a convex disk shape, and one end of the transition piece 41 may be laser welded to the bottom of the yoke plate 3 or may be resistance welded to the bottom of the yoke plate 3. In the embodiment of the present application, one end of the transition piece 41 is laser welded to the bottom of the yoke plate 3. The other end of the transition piece 41 is provided penetrating the first through hole 31 in a vertically upward direction and protruding from the first through hole 31. A gap is provided between the transition piece 41 and the inner wall of the first through hole 31, and the protrusion of the gap near the transition piece 41 is provided at one end of the first through hole 31 to reduce the contact area of the transition piece 41 and the yoke plate 3.

Referring to fig. 2, the transition piece 41 is provided with a second through hole 411 penetrating in the vertical direction, and the second through hole 411 is circularly disposed. The contact pin 42 is disposed in the second through hole 411 in a vertical direction, the contact pin 42 is connected to an inner wall of the second through hole 411 by glass welding, and a top and a bottom of the contact pin 42 are respectively penetrated in the second through hole 411 in a vertical upward and a vertical downward direction. When the coil 21 is energized, both ends of the auxiliary reed 251 are respectively disposed away from the top of each of the contact pins 42, and when the coil 21 is not energized, both ends of the auxiliary reed 251 are respectively disposed against the top of each of the contact pins 42. One end of the outgoing terminal wire 43 is connected to the bottom of the contact pin 42, and the other end of the outgoing terminal wire 43 is connected to an internal energy-saving circuit board so as to control on-off of the indication circuit.

Referring to fig. 2, the auxiliary reed 251 is provided at the top thereof with a second return spring 252, one end of the second return spring 252 being fixedly installed at the top of the auxiliary reed 251 in the vertical direction. The contact assembly comprises an active reed 5 and two main fixed contacts 6. The active reed 5 is fixedly installed at the other end of the second return spring 252, and the active reed 5 is disposed in the horizontal direction. The two main fixed contacts 6 are arranged at the top of the driving reed 5 along the vertical direction, and the two main fixed contacts 6 are respectively arranged near two ends of the driving reed 5. The main static contact 6 is fixedly arranged on the shell 1, the bottom end of the main static contact 6 is sealed in the shell 1, and the top end of the main static contact 6 is arranged on the shell 1 in a protruding mode so as to be convenient for connecting an external high-voltage circuit. When the coil 21 is electrified, two ends of the active reed 5 are respectively in butt fit with the main fixed contacts 6, and an external high-voltage circuit is communicated.

The implementation principle of the auxiliary contact lead-out structure of the contactor is as follows: when the coil 21 is not electrified, the first return spring 26 stretches to enable the movable iron core 23 to move in a direction away from the static iron core 24, and then the connecting rod 25 drives the auxiliary reeds 251 to move, so that the two auxiliary reeds 44 are respectively in abutting fit with the two contact pins 42, the two contact pins 42 are communicated to enable the outgoing end wires 43 respectively connected with the contact pins 42 to be communicated, and further an indication circuit connected with the contact pins 42 is communicated. After the indication circuit is communicated, the current in the indication circuit passes through the contact pin 42, the contact pin 42 is connected to the transition piece 41 through glass welding with good insulation, and the transition piece 41 is welded to the yoke plate 3 through laser, so that the contact pin 42 is difficult to directly contact with the yoke plate 3, the insulation between the contact pin 42 and the yoke plate 3 is improved, and the insulation performance between the high-voltage contact and the auxiliary contact is further improved.

When the coil 21 is electrified, the movable iron core 23 generates magnetism, and the movable iron core 23 moves towards the direction approaching the static iron core 24 under the action of the magnetism of the movable iron core, so that the connecting rod 25 drives the two auxiliary reeds 44 to be respectively far away from each contact pin 42, and the lead-out end wires 43 respectively connected with the contact pins 42 are disconnected. When a low voltage indicating circuit is connected between the two lead-out wires 43, the low voltage indicating circuit is connected to indicate that the contactor is in an off state, and the low voltage indicating circuit is disconnected to indicate that the contactor is in an on state.

Example 2.

The main difference between the embodiment of the present application and embodiment 1 is that: the connection relationship between the transition piece 41 and the yoke plate 3 is different.

Referring to fig. 3, one end of the transition piece 41 is resistance welded to the top of the yoke plate 3, and the other end of the transition piece 41 is penetrated through the first through hole 31 in a vertically downward direction and is protruded from the first through hole 31. The implementation principle of embodiment 2 is the same as that of embodiment 1, and will not be described here again.

Example 3.

The main difference between the embodiment of the present application and embodiment 1 is that: the connection relationship between the transition piece 41 and the yoke plate 3 is different.

Referring to fig. 4, one end of the transition piece 41 is resistance welded to the top of the yoke plate 3, and the other end of the transition piece 41 is protruded in the first through hole 31 in a vertically upward direction so as to reduce debris attached to the outer circumferential surface of the contact pin 42 due to an instantaneous high temperature after the stationary contact contacts the active reed, thereby ensuring normal use of the contact pin 42. The gap between the contact pin 42 and the first through hole 31 is filled with the insulating paste 8 so as to ensure stability and insulation of the connection between the contact pin 42 and the yoke plate 3. The implementation principle of embodiment 3 is the same as that of embodiment 1, and will not be described here again.

Example 4.

The main difference between the embodiment of the present application and embodiment 1 is that: the connection relationship between the transition piece 41 and the yoke plate 3 is different.

Referring to fig. 5, one end of the transition piece 41 is resistance welded to the bottom of the yoke plate 3, and the other end of the transition piece 41 is provided protruding in the first through hole 31 in a vertically downward direction. The gap between the contact pin 42 and the first through hole 31 is filled with the insulating paste 8 so as to ensure stability and insulation of the connection between the contact pin 42 and the yoke plate 3. The implementation principle of embodiment 4 is the same as that of embodiment 1, and will not be described here again.

Example 5.

The main difference between the embodiment of the present application and embodiment 1 is that: the specific arrangement of the second through holes 411 is different. Referring to fig. 6, the second through hole 411 has an elliptical shape in order to increase the applicability of the transition piece 41. The implementation principle of embodiment 4 is the same as that of embodiment 1, and will not be described here again.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a contactor auxiliary contact draws structure which characterized in that: the yoke iron plate comprises a yoke iron plate (3) and auxiliary components (4), wherein two first through holes (31) are formed in the yoke iron plate (3) in a penetrating mode, two auxiliary components (4) are arranged, and the two auxiliary components (4) are correspondingly arranged in the first through holes (31) respectively;

the auxiliary assembly (4) comprises a transition piece (41), a contact pin (42) and an outgoing end wire (43), one end of the transition piece (41) is fixedly connected to the yoke plate (3) in a welding mode, the other end of the transition piece (41) is arranged on the first through hole (31) in a protruding mode along the thickness direction of the yoke plate (3), the transition piece (41) penetrates through the second through hole (411), the contact pin (42) is fixedly connected to the inner wall of the second through hole (411) through glass welding, and one end of the outgoing end wire (43) is connected to the contact pin (42).

2. A contactor auxiliary contact lead-out structure according to claim 1, wherein: the transition piece (41) is resistance welded or laser welded to the yoke plate (3).

3. A contactor auxiliary contact lead-out structure according to claim 1, wherein: the material of the transition piece (41) is selected from nickel-plated low-carbon steel or stainless steel.

4. A contactor auxiliary contact lead-out structure according to claim 1, wherein: a gap is arranged between the transition piece (41) and the inner wall of the first through hole (31), and the gap is close to one end of the transition piece (41) penetrating through the first through hole (31).

5. A contactor auxiliary contact lead-out structure according to claim 1, wherein: the yoke plate (3) is arranged in the horizontal direction, one end of the transition piece (41) is fixedly arranged at the top of the yoke plate (3), and the other end of the transition piece (41) is arranged in the first through hole (31) in a protruding mode in the vertical upward direction.

6. A contactor auxiliary contact lead-out structure according to claim 1, wherein: the yoke plate (3) is arranged in the horizontal direction, one end of the transition piece (41) is fixedly arranged at the bottom of the yoke plate (3), the other end of the transition piece (41) is arranged in the first through hole (31) in a protruding mode in the vertical downward direction, and an insulating adhesive (8) is filled in a gap between the contact pin (42) and the first through hole (31).

7. A contactor auxiliary contact lead-out structure according to claim 1, wherein: the end of the outgoing terminal wire (43) remote from the contact pin (42) is connected to an internal energy-saving circuit board.

8. A contactor auxiliary contact lead-out structure according to claim 1, wherein: the second through hole (411) is elliptical.