Transmission mechanism of magnetic latching relay and magnetic latching relay
By using inclined transmission parts in the magnetic holding relay, the transmission mechanism design is optimized and the distance between the moving contacts and the static contacts is increased, the problem of insufficient spacing in the existing technology is solved, the arc resistance is improved and the requirements of the national grid are met. , while maintaining the compactness of the product and preventing adhesions.
Patent Information
- Application Number
- CN202421166969.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The distance between the dynamic contacts and static contacts of existing magnetic retention relays is small, and the arc resistance and breaking capacity are insufficient, which cannot meet the requirements of the State Grid. At the same time, increasing the distance will lead to increased product volume or difficulty in driving.
The transmission member with an inclined configuration, including the first transmission arm and the second transmission arm, is connected by a hinge seat and a shrapnel bracket, increases the spacing between the moving contact and the static contact, and uses the U-shaped structure of the transmission member and the wishbone design to optimize the The length and angle of the force arm can achieve the expansion of the spacing without increasing the volume.
Without changing the effective force arm length and rotation angle of the moving armature assembly, increase the distance between the moving contacts and the static contacts, improve the arc resistance, meet the requirements of the national power grid, and prevent the moving contacts and static contacts through the heat dissipation body. Adhesion.
Smart Images
Figure CN222338186U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of relays, in particular to a transmission mechanism of a magnetic latching relay and a magnetic latching relay. Background Art
[0002] The existing magnetic latching relay used in electric energy meters is generally composed of an electromagnet assembly, a movable armature assembly, a stationary contact assembly, a moving contact assembly, a push card, a relay base and a relay cover. When the electromagnetic coil of the electromagnet assembly is excited, the magnetic pole changes, attracting / repelling the movable armature assembly, causing the movable armature assembly to move, and the reciprocating motion of the push card drives the movable contact assembly to move, thereby realizing the opening / closing of the movable / stationary contacts;
[0003] The existing magnetic latching relay has a small distance between the moving contact and the static contact, which makes the magnetic latching relay's arc resistance and breaking capacity weak and cannot meet the requirements of the existing national power grid;
[0004] The moving contact and the stationary contact of the existing magnetic latching relay drive the moving contact assembly to move through the reciprocating motion of the push card to realize the opening / closing of the moving / stationary contacts. The push card is set along the opening / closing motion direction of the moving / stationary contacts. The translation amount of the push card is the distance between the moving contact and the stationary contact. The translation amount of the push card is controlled by the effective force arm length of the moving armature assembly and the rotation angle of the moving armature assembly.
[0005] Therefore, if the existing magnetic latching relay with a push card structure wants to increase the distance between the moving contact and the static contact, 1) it is necessary to increase the armature rotation angle of the electromagnetic part. As the rotation angle increases, the air gap between the armature and the yoke increases, and it may be impossible to drive;
[0006] 2) Increase the length of the driving arm. After the arm is lengthened, the product volume will increase, which will cause difficulties for customers to use;
[0007] In order to increase the distance between the moving contact and the static contact while keeping the volume unchanged and meet the requirements of the existing national power grid, it is an urgent problem that the existing magnetic latching relay needs to solve. Utility Model Content
[0008] The purpose of the utility model is to solve the above technical problems and to provide a transmission mechanism of a magnetic latching relay and a magnetic latching relay.
[0009] To achieve the above object, the utility model adopts the following technical solutions: A driving mechanism of a magnetic latching relay includes a moving armature assembly and a moving contact assembly. A hinge seat is provided on one side of the moving armature assembly. A shrapnel bracket is provided at the position of the moving contact of the moving contact assembly. An inclined shrapnel is provided on the shrapnel bracket. A transmission member is connected between the moving armature assembly and the moving contact assembly. The transmission member is pivotally connected to the relay base. One end of the transmission member has a first transmission arm arranged obliquely and is connected to the hinge seat of the moving armature assembly. The other end of the transmission member has a second transmission arm arranged obliquely and abuts against the shrapnel.
[0010] A further preferred technical solution is that the transmission member includes an intermediate connecting portion. The connecting portion is of a U-shaped structure. The first transmission arm is obliquely arranged on the connecting portion. The included angle between the first transmission arm and the connecting portion is greater than 90 degrees and less than 150 degrees. A second transmission arm is provided at one end of the connecting portion close to the shrapnel. The second transmission arm is also obliquely arranged on the connecting portion. The included angle between the second transmission arm and the connecting portion is greater than 90 degrees and less than 150 degrees.
[0011] A further preferred technical solution is that the first transmission arm and the second transmission arm are obliquely arranged on the connecting portion in opposite directions, presenting a "冖" shape.
[0012] A further preferred technical solution is that the second transmission arm of the transmission member is a pair of symmetrically arranged fork arms. The pair of fork arms of the second transmission arm abut against the shrapnel respectively from both sides of the moving contact assembly.
[0013] A further preferred technical solution is that the shrapnel bracket is a U-shaped bracket. The two side arms of the U-shaped bracket are mounted on the moving contact in a manner away from the moving contact. The shrapnel is also a U-shaped shrapnel. The two side arms of the U-shaped shrapnel are riveted to the two side arms of the U-shaped bracket one by one. The included angle between the shrapnel and the shrapnel bracket is 40 - 50 degrees.
[0014] A further preferred technical solution is that an insulating sheet is also provided at the end of the connecting portion on one side of the first transmission arm.
[0015] A further preferred technical solution is that a bent buckle is provided on the connecting portion on the adjacent side of the first transmission arm. A card hole is provided on the insulating sheet. The insulating sheet is buckled on the connecting portion. The insulating sheet is obliquely mounted on the connecting portion and is obliquely opposite to the first transmission arm. A dial groove is provided on the insulating sheet and is connected to a passive moving piece.
[0016] A further preferred technical solution includes a relay base and a relay cover that is snap-connected, wherein the relay base is provided with an electromagnet assembly, a moving armature assembly, a static contact assembly, and a moving contact assembly; and a transmission mechanism is provided in the relay base between the moving armature assembly and the moving contact assembly.
[0017] A further preferred technical solution is that a heat sink is provided around the cavity formed after the moving contact of the moving contact assembly and the static contact of the static contact assembly are disconnected.
[0018] A further preferred technical solution is that a first heat sink is provided at the contact position between the moving contact of the moving contact assembly and the static contact of the static contact assembly, close to the upper cover of the relay, and the first heat sink is in the shape of a sheet; a second heat sink is provided on the side close to the relay base, and the second heat sink is in the shape of a sheet; the first heat sink and the second heat sink are symmetrically arranged, and a third heat sink is provided between the first heat sink and the second heat sink, close to the moving contact, and the third heat sink is in the shape of a sheet; a fourth heat sink is provided between the first heat sink and the second heat sink, close to the static contact assembly and the moving contact assembly, and the fourth heat sink is in the shape of a sheet, and the fourth heat sink is located on the side of the moving contact and the static contact away from the transmission member.
[0019] Compared with the prior art, the utility model has the following beneficial effects: the length of the first force arm of the toggle member is greater than the length of the second force arm, so that the translation component of the first force arm along the opening / closing movement direction of the moving / static contact is greater than the translation component of the second force arm along the opening / closing movement direction of the moving / static contact, so that the distance between the moving contact and the static contact is increased when the effective force arm length of the moving armature assembly and the rotation angle of the moving armature assembly remain unchanged;
[0020] The inclined spring piece can increase the distance between the moving contact and the stationary contact, thereby improving the arc resistance of the magnetic latching relay.
[0021] While maintaining the same volume, the distance between the moving contact and the static contact is increased to meet the requirements of the existing national power grid;
[0022] The heat generated can be effectively transferred through heat sinks such as ceramic sheets to prevent the moving contact and the static contact from sticking together. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is the axonometric diagram of the transmission structure of the utility model;
[0024] Figure 2 This is the axonometric drawing of the transmission part of the utility model;
[0025] Figure 3 This is an axonometric view of the movable armature assembly of the utility model;
[0026] Figure 4 This is an axonometric view of the moving contact assembly of the utility model;
[0027] Figure 5 This is the axonometric diagram of the magnetic latching relay of the utility model;
[0028] Figure 6 This is the heat dissipation isometric diagram of the magnetic latching relay of the utility model;
[0029] Figure 7 This is a diagram showing the change in the distance between the moving contact and the static contact for the implementation of the utility model;
[0030] In the figure: 10. moving armature assembly; 11. hinge seat; 20. transmission member; 21. connecting part; 22. first transmission arm; 23. insulating sheet; 24. second transmission arm; 30. moving contact assembly; 31. shunt sheet assembly; 32. spring sheet; 33. moving contact; 34. spring sheet bracket; 40. stationary contact assembly; 41. stationary contact; 42. stationary spring sheet; 50. relay base; 60. electromagnet assembly; 70. passive moving sheet; 80. insulating spacer; 91. third heat sink; 92. first heat sink; 93. fourth heat sink; 94. second heat sink. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Example
[0032] like Figure 1-4 As shown, a transmission mechanism of a magnetic latching relay includes a movable armature assembly 10 and a movable contact assembly 30, a hinge seat 11 is provided on one side of the movable armature assembly 10, a spring 32 is provided at the position of the movable contact 33 of the movable contact assembly 30, a transmission member 20 is provided between the movable armature assembly 10 and the movable contact assembly 30, the transmission member 20 is pivotally connected to the relay base 50, one end of the transmission member 20 is connected to the hinge seat 11 of the movable armature assembly 10, and the other end is in contact with the spring 32;
[0033] Driven by the electromagnet assembly 60, the movable armature assembly 10 swings, and the movable armature assembly 10 drives the transmission member 20 to swing around the pivot portion. The transmission member 10 moves the moving contact 33, so that the stationary contact assembly 40 and the moving contact assembly 30 are closed or separated.
[0034] In one embodiment, the transmission member 20 includes an intermediate connection portion 21. The connection portion has a U-shaped structure and good strength. One end of the connection portion 21 close to the moving armature assembly 10 has a first transmission arm 22. The first transmission arm 22 is inclined on the connection portion 21, and the included angle between the first transmission arm 22 and the connection portion 21 is greater than 90 degrees and less than 150 degrees. One end of the connection portion 21 close to the elastic piece 32 is provided with a second transmission arm 24. The second transmission arm 24 is inclined on the connection portion 21, and the included angle between the second transmission arm 24 and the connection portion 21 is greater than 90 degrees and less than 150 degrees. Further, the first transmission arm 22 and the second transmission arm 24 are inclined on the connection portion 21 in opposite directions, showing a shape like "冖". This structure can make the space occupied by the transmission member 20 smaller, which helps to make the structure of the magnetic latching relay more compact. The first transmission arm 22 of the transmission member 20 is hinged to the hinge seat 11 on the side of the moving armature assembly 10 through a hinge shaft. A pivot hole is provided at a position where the first transmission arm 22 is close to the connection portion 21, and a pivot shaft is installed on the relay base 50 through the pivot hole. The second transmission arm 24 of the transmission member 20 is elastically abutted against the elastic piece 32 in the moving contact assembly 30.
[0035] Since the structure of the magnetic latching relay is relatively compact, in order to make the distance between the moving contact 33 and the static contact 41 larger so as to improve the arc resistance and breaking ability of the magnetic latching relay, the second transmission arm 24 of the transmission member 20 is a pair of symmetrically arranged fork arms. The pair of fork arms of the second transmission arm 24 are respectively abutted against the elastic piece 32 from both sides of the moving contact assembly 30. In order to improve the breaking ability and distance between the moving contact 33 and the static contact 41, the elastic piece 32 is installed on the elastic piece bracket 34. The elastic piece bracket 34 is connected to the moving contact 33. Specifically, the elastic piece bracket 34 is a U-shaped bracket. The two side arms of the U-shaped bracket are installed on the moving contact 33 in a manner away from the moving contact 33. The elastic piece 32 is also a U-shaped elastic piece. The two side arms of the U-shaped elastic piece are riveted to the two side arms of the U-shaped bracket one by one, and the elastic piece 32 is inclined on the elastic piece bracket 34. The included angle between the elastic piece 32 and the elastic piece bracket 34 is 40 - 50 degrees. When the angle is too small, the distance between the moving contact 33 and the static contact 41 cannot be effectively increased. When the angle is too large, the breaking elastic force between the moving contact 33 and the static contact 41 cannot be effectively increased.
[0036] A pair of fork arms on the transmission member 20 are inserted into the two side arms of the spring piece 32 and the spring piece bracket 34 in a one-to-one correspondence from the connecting ends of the spring piece 32 and the spring piece bracket 34, and can form abutment with the spring piece 32 or the spring piece bracket 34. Furthermore, the opening of the fork arm is enlarged and the side close to the spring piece 32 is lengthened, so that the fork arm can better cooperate with the spring piece 32, and the distance between the moving contact 33 and the static contact 41 can be increased, so as to drive the static contact assembly 40 and the moving contact assembly 30 to close or separate.
[0037] Driven by the electromagnet assembly 60, the movable armature assembly 10 swings, and the movable armature assembly 10 drives the transmission member 20 to swing around the pivot portion. A pair of fork arms of the transmission member 20 press the spring sheet 32 to close or separate the static contact assembly 40 and the movable contact assembly 30. The inclined spring sheet 32 can increase the distance between the movable contact 33 and the static contact 41, thereby improving the arc resistance of the magnetic holding relay.
[0038] An insulating sheet 23 is also provided at the end of the connecting portion 21 on one side of the first transmission arm 22. Specifically, a bent buckle is provided on the connecting portion 21 on the adjacent side of the first transmission arm 22, and a buckle is provided on the insulating sheet 23. The insulating sheet 23 is buckled on the connecting portion 21. The insulating sheet 23 is obliquely installed on the connecting portion 21 and is inclined in the opposite direction to the first transmission arm 22. A pull groove is provided on the insulating sheet 23 to connect with the passive moving sheet 70. The insulating sheet 23 drives the passive node moving sheet to swing, thereby realizing the opening or closing of the passive node. The passive node can provide the contact state of the switch, introduce an external power supply, and simplify the hardware design.
[0039] like Figure 5 As shown, the present application provides a magnetic latching relay, including a relay base 50 and a relay upper cover connected by snapping, wherein the relay base 50 is provided with an electromagnet assembly 60, a movable armature assembly 10, a static contact assembly 40, and a movable contact assembly 30; a transmission member 20 is provided in the relay base 50 between the movable armature assembly 10 and the movable contact assembly 30, and the transmission member 20 is pivotally connected in the relay base 50, one end of the transmission member 20 is connected to the hinge seat of the movable armature assembly 10 through a hinge shaft, and the other end of the transmission member 20 is connected to the spring piece 32 of the movable contact assembly 30;
[0040] like Figure 7As shown, the length L1 of the first force arm from the pivot center of the transmission member 20 to the elastic piece 52 of the moving contact assembly 30 is greater than the length L2 of the second force arm from the pivot center of the transmission member 20 to the hinge seat 3 of the moving armature assembly 10. By having the first force arm length L1 of the transmission member 20 greater than the second force arm length L2, the translational component of the first force arm in the opening / closing movement direction of the moving / static contacts is greater than the translational component of the second force arm in the opening / closing movement direction of the moving / static contacts. In this way, with the effective force arm length and the rotation angle of the moving armature assembly 10 remaining unchanged, the distance between the moving contact 33 and the static contact 41 is increased;
[0041] In the existing magnetic latching relay, the moving armature assembly 10 and the moving contact assembly 30 are generally arranged in parallel within the relay base 50. The moving armature assembly 10 is pivotally connected within the relay base 50. Therefore, the moving armature assembly 10 makes a rotational movement, and the moving contact 33 also makes a rotational movement under the action of the pushing card. Therefore, the pushing card is vertically arranged at the outer end of the moving contact 33 of the moving contact assembly 30. In this application, in order to enable the transmission member 20 to achieve the function of increasing the distance between the moving contact 33 and the static contact, the connecting part of the transmission member 20 and the moving contact 33 is located inside the moving contact 33 of the moving contact assembly 30. In this way, the space between the moving armature assembly 10 and the moving contact 33 can be utilized to reasonably arrange the structure of the transmission member 20 so that the length L1 of the first force arm from the pivot center of the transmission member 20 to the elastic piece 32 of the moving contact assembly 30 meets the requirements.
[0042] Further, in order to enable the transmission member 20 to simultaneously meet the connection with the moving armature assembly 10 and the moving contact 33, one end of the connecting portion 21 close to the moving armature assembly 10 has a first transmission arm 22, and one end of the connecting portion 21 close to the elastic piece 32 is provided with a second transmission arm 24. Further, the first transmission arm 22 and the second transmission arm 24 are inclined in opposite directions on the connecting portion 21, presenting a "冖" shape. This structure can make the space occupied by the transmission member 20 smaller, contributing to making the structure of the magnetic latching relay more compact. The first transmission arm 22 of the transmission member 20 is hinged to the hinge seat 11 on the side of the moving armature assembly 10 through a hinge shaft. A pivot hole is provided at a position near the middle of the first transmission arm 22, and a pivot shaft is installed on the relay base 50 through the pivot hole. The second transmission arm 24 of the transmission member 20 elastically abuts against the elastic piece 32 in the moving contact assembly 30.
[0043] Inside the relay base 50 between the moving armature assembly 10 and the moving contact assembly 30, a static contact assembly 40 is provided, as Figure 2 shown, the static contact assembly 40 includes a static electric piece and a static contact 41 provided on the static electric piece, as Figure 3As shown, the moving contact assembly 30 is composed of a conductive sheet and shunt sheet assembly 31, a moving contact 33, a spring sheet 32, and a spring sheet bracket 34. The shunt sheet assembly is composed of a first shunt sheet, a second shunt sheet, a third shunt sheet, and a fourth shunt sheet stacked in sequence to form a spring sheet stack. One end of the spring sheet stack is riveted together through the moving contact 33 and the spring sheet bracket 34, the spring sheet 32 is riveted to the spring sheet bracket 34, and the other end of the spring sheet stack is fixedly riveted to the conductive sheet.
[0044] like Figure 6 As shown, a first heat sink 92 is provided at the contact position between the moving contact 33 of the moving contact assembly 30 and the static contact 41 of the static contact assembly 40, near the relay cover, and the first heat sink 92 is in the shape of a sheet. A second heat sink 94 is provided on the side near the relay base 50, and the second heat sink 94 is in the shape of a sheet. The first heat sink 92 and the second heat sink 94 are symmetrically arranged, and a third heat sink 91 is provided between the first heat sink 92 and the second heat sink 94, near the moving contact 33, and the third heat sink 91 is in the shape of a sheet. A fourth heat sink 93 is provided between the first heat sink 92 and the second heat sink 94, near the static contact assembly 40 and the moving contact assembly 30, and the fourth heat sink 93 is in the shape of a sheet. The fourth heat sink 93 is located on the side of the moving contact 33 and the static contact 41 away from the transmission member 20.
[0045] The first heat sink 92 , the second heat sink 94 , the third heat sink 91 , and the fourth heat sink 93 form a heat dissipation structure around a cavity formed after the moving contact 33 and the stationary contact 41 are in contact and disconnected.
[0046] A row of obliquely arranged insulating spacers 80 is further provided between the transmission member 20 and the stationary contact assembly 40 . The insulating spacers 80 may be made of metal or ceramic.
[0047] like Figure 6 As shown, when the moving contact 33 and the stationary contact 41 are disconnected, gas discharge generates an arc, which will generate a large amount of heat. Moreover, since the magnetic holding relay has a compact structure and cannot fan out heat, the long-term high temperature state causes the moving contact 33 and the stationary contact 41 to stick together. The generated heat can be effectively transferred through heat sinks such as ceramic sheets.
[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A transmission mechanism of a magnetic latching relay, characterized in that: It includes a moving armature assembly and a moving contact assembly. A hinge seat is provided on one side of the moving armature assembly. A shrapnel bracket is provided at the position of the moving contact of the moving contact assembly. An inclined shrapnel is provided on the shrapnel bracket. A transmission member is connected between the moving armature assembly and the moving contact assembly. The transmission member is pivotally connected to the relay base. One end of the transmission member has a first transmission arm with an inclined setting connected to the hinge seat of the moving armature assembly, and the other end of the transmission member has a second transmission arm with an inclined setting abutting against the shrapnel.
2. The transmission mechanism of a magnetic latching relay according to claim 1, characterized in that: The transmission member includes a connecting portion in the middle. The connecting portion is of a U-shaped structure. The first transmission arm is inclinedly arranged on the connecting portion. The included angle between the first transmission arm and the connecting portion is greater than 90 degrees and less than 150 degrees. A second transmission arm is provided at one end of the connecting portion close to the shrapnel. The second transmission arm is also inclinedly arranged on the connecting portion. The included angle between the second transmission arm and the connecting portion is greater than 90 degrees and less than 150 degrees.
3. A transmission mechanism of a magnetic latching relay according to claim 1 or 2, characterized in that: The first transmission arm and the second transmission arm are inclinedly arranged on the connecting portion in opposite directions, presenting a "冖" shape.
4. The transmission mechanism of a magnetic latching relay according to claim 1, characterized in that: The second transmission arm of the transmission member is a pair of symmetrically arranged fork arms. The pair of fork arms of the second transmission arm abut against the shrapnel respectively from both sides of the moving contact assembly.
5. The transmission mechanism of a magnetic latching relay according to claim 4, characterized in that: The shrapnel bracket is a U-shaped bracket. The two side arms of the U-shaped bracket are mounted on the moving contact in a manner of being away from the moving contact. The shrapnel is also a U-shaped shrapnel. The two side arms of the U-shaped shrapnel are riveted to the two side arms of the U-shaped bracket one by one. The included angle between the shrapnel and the shrapnel bracket is 40 - 50 degrees.
6. The transmission mechanism of a magnetic latching relay according to claim 2, characterized in that: An insulating sheet is further provided at the end of the connecting portion on one side of the first transmission arm.
7. The transmission mechanism of a magnetic latching relay according to claim 6, characterized in that: A bent buckle is provided on the connecting portion adjacent to one side of the first transmission arm. A card hole is provided on the insulating sheet. The insulating sheet is buckled on the connecting portion. The insulating sheet is inclinedly mounted on the connecting portion and is inclined in the opposite direction to the first transmission arm. A dial groove is provided on the insulating sheet and is connected to the passive moving piece.
8. A magnetic latching relay, comprising a relay base and a relay cover connected by snapping, wherein the relay base is provided with an electromagnet assembly, a movable armature assembly, a stationary contact assembly, and a movable contact assembly; characterized in that: The relay base between the moving armature assembly and the moving contact assembly is provided with the transmission mechanism according to any one of claims 1 - 7.
9. A magnetic latching relay according to claim 8, characterized in that: A heat sink is provided around the cavity formed after the contact between the moving contact of the moving contact assembly and the static contact of the static contact assembly is disconnected.
10. A magnetic latching relay according to claim 9, characterized in that: A first heat sink is provided on one side close to the relay upper cover at the contact position between the moving contact of the moving contact assembly and the static contact of the static contact assembly, and a second heat sink is provided on one side close to the relay base. The first heat sink and the second heat sink are symmetrically arranged. A third heat sink is provided at a position close to the moving contact between the first heat sink and the second heat sink, and a fourth heat sink is provided at a position between the first heat sink and the second heat sink close to the position of the static contact assembly and the moving contact assembly. The fourth heat sink is located on the side of the moving contact and the static contact away from the transmission member.