Large-opening-range and high-reliability magnetic latching relay

Abstract

The utility model discloses a magnetic latching relay with large opening distance and high reliability, which comprises a relay base and a relay upper cover which is connected with the relay base in a buckling manner, and a magnet assembly, a moving armature assembly, a static contact assembly and a moving contact assembly are arranged in the relay base. A shifting piece is arranged in the relay base between the moving armature assembly and the moving contact assembly, the shifting piece is pivoted in the relay base, one end of the shifting piece is connected with a driving arm of the moving armature assembly, and the other end of the shifting piece is connected with an elastic piece of the moving contact assembly; the length from the pivoting center of the shifting piece to a first force arm of an elastic piece of the moving contact assembly is greater than the length from the pivoting center of the shifting piece to a second force arm of a driving arm of the moving armature assembly, and the length of the first force arm passing through the shifting piece is greater than the length of the second force arm; under the condition that the size is not changed, the distance between the moving contact and the static contact is increased, and the requirement of the existing state grid is met.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a magnetic latching relay with large opening distance and high reliability. 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 adopting the 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 there may be a situation where it cannot be driven;

[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 provide a magnetic latching relay with large opening distance and high reliability.

[0009] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a large-opening-distance, high-reliability magnetic latching relay, comprising a relay base and a relay upper cover connected by snapping, wherein the relay base is provided with an electromagnet assembly, a movable armature assembly, a static contact assembly, and a movable contact assembly, characterized in that a toggle member is provided in the relay base between the movable armature assembly and the movable contact assembly, the toggle member is pivotally connected in the relay base, one end of the toggle member is connected with the driving arm of the movable armature assembly, and the other end of the toggle member is connected with the spring piece of the movable contact assembly;

[0010] A first lever arm length from the pivot center of the toggle member to the spring of the movable contact assembly is greater than a second lever arm length from the pivot center of the toggle member to the driving arm of the movable armature assembly.

[0011] In order to enable the toggle member to simultaneously meet the connection between the drive arm of the movable armature assembly and the movable contact, a further preferred technical solution is that the angle formed by the first force arm and the second force arm is greater than 90 degrees and less than 180 degrees.

[0012] In order to enable the toggle member to be stably connected with the driving arm of the moving armature assembly and the moving contact, transmit the driving force, and have a good service life, a further preferred technical solution is that the connecting end of the toggle member and the moving contact has a U-shaped bayonet, the spring piece on the moving contact is embedded in the bayonet, and the connecting end of the toggle member and the driving arm has a through hole along the outer extension direction of the driving arm, and the driving arm is inserted into the through hole.

[0013] In order to make the connection between the second force arm of the toggle member and the driving arm more stable, a further preferred technical solution is that the end of the second force arm of the toggle member has an elliptical connecting plate, the connecting plate is provided with an elliptical connecting hole, the connecting part of the driving arm is a double-ear connecting part, the double-ear connecting part is provided with a through pin hole, the connecting plate of the second force arm is inserted between the double-ear connecting parts of the driving arm, and a pin shaft passes through the second force arm from one side of the double-ear connecting part to the other side of the double-ear connecting part.

[0014] In order to reduce the weight of the toggle member and make the toggle member have a good force transmission effect, a further preferred technical solution is that a weight-reducing hole is provided on the first force arm of the toggle member along the width direction.

[0015] In order to make the toggle member have good strength, a further preferred technical solution is that a first reinforcing rib is provided on the side of the first force arm of the toggle member away from the movable armature assembly along the length direction; a second reinforcing rib is provided on the side of the second force arm of the toggle member close to the movable armature assembly along the length direction, and the second reinforcing rib extends to the junction of the first force arm and the second force arm.

[0016] A further preferred technical solution is that a block is provided on the driving arm, and a micro switch is provided on the relay base. The moving armature assembly can drive the moving reed of the micro switch to rotate during the process of rotating the opening and closing switch, thereby forming contact and disconnection with the static reed of the micro switch.

[0017] 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;

[0018] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An axonometric diagram is provided for the implementation of the utility model;

[0020] Figure 2 One of the partial axonometric drawings for the implementation of the utility model;

[0021] Figure 3 A partial axonometric drawing 2 for the implementation of the utility model;

[0022] Figure 4 Implement a two-axonometric drawing for this utility model;

[0023] Figure 5 One of the two partial axonometric drawings of the present utility model;

[0024] Figure 6 The second partial axonometric drawing of the present utility model;

[0025] 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;

[0026] In the figure: 10. Relay base; 20. Electromagnet assembly; 30. Moving armature assembly; 31. Double-ear connecting part; 32. Stopper; 33. Driving arm; 40. Micro switch; 41. Moving spring; 42. Static spring; 50. Moving contact assembly; 51. Moving contact; 52. Spring; 60. Toggle member; 61. Connecting hole; 62. Second force arm; 63. First reinforcing rib; 64. First force arm; 65. Bayonet; 66. Second reinforcing rib; 67. Through hole; 70. Pin; 80. Static contact assembly. DETAILED DESCRIPTION

[0027] 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.

[0028] Example

[0029] like Figure 1-3 As shown, the present application provides a magnetic latching relay with a large opening distance and high reliability, including a relay base 10 and a relay upper cover connected by snapping, wherein the relay base 10 is provided with an electromagnet assembly 20, a movable armature assembly 30, a static contact assembly 80, and a movable contact assembly 50; a toggle member 60 is provided in the relay base 10 between the movable armature assembly 30 and the movable contact assembly 50, and the toggle member 60 is pivotally connected in the relay base 10, one end of the toggle member 60 is connected with the driving arm 33 of the movable armature assembly 30, and the other end of the toggle member 60 is connected with the spring 52 of the movable contact assembly 50;

[0030] like Figure 7 As shown, the length L1 of the first force arm 64 from the pivot center of the toggle member 30 to the spring 52 of the movable contact assembly 50 is greater than the length L2 of the second force arm 62 from the pivot center of the toggle member 60 to the driving arm 33 of the movable armature assembly 30. By making the length L1 of the first force arm 64 of the toggle member 30 greater than the length L2 of the second force arm 62, the translation component B of the first force arm 64 along the opening / closing movement direction of the movable / static contact is greater than the translation component A of the second force arm 62 along the opening / closing movement direction of the movable / static contact. In this way, when the effective force arm length of the movable armature assembly 30 and the rotation angle of the movable armature assembly 30 remain unchanged, the distance between the movable contact 51 and the static contact is increased.

[0031] The movable armature assembly 30 and the movable contact assembly 50 of the existing magnetic latching relay are generally arranged in parallel in the relay base 10. The movable armature assembly 30 is pivoted in the relay base 10, so the driving arm 33 of the movable armature assembly 30 rotates, and the movable contact 51 also rotates under the action of the push card. Therefore, the push card is vertically arranged at the outer end of the movable contact 51 of the movable contact assembly 50. In this application, in order to enable the toggle member 60 to realize the function of increasing the distance between the movable contact 51 and the static contact, the connecting part of the toggle member 60 and the movable contact 51 is located on the inner side of the movable contact 51 of the movable contact assembly 50. In this way, the space between the driving arm 33 of the movable armature assembly 30 and the movable contact 51 can be used to reasonably set the structure of the toggle member 60, so that the length L1 of the first force arm 64 from the pivot center of the toggle member 60 to the spring 52 of the movable contact assembly 50 meets the requirement;

[0032] Further, in order to make the toggle member 60 simultaneously meet the connection with the driving arm 33 of the movable armature assembly 30 and the movable contact 51, the angle a formed by the first force arm 64 and the second force arm 62 is greater than 90 degrees and less than 180 degrees. Since the contact position between the driving arm 33 and the toggle member 60 and the contact position between the toggle member 60 and the movable contact 51 will change under the open / closed state, the angle a changes within a certain range. In this way, the first force arm 64 of the toggle member 60 is arranged radially along the motion trajectory of the movable contact 51, and the second force arm 62 of the toggle member 60 is arranged tangentially along the motion trajectory of the driving arm of the movable armature assembly 30. This structure can effectively increase the length L1 of the first force arm 64, thereby increasing the spacing between the movable contact 51 and the static contact.

[0033] Further, in order to enable the toggle member 60 to stably engage with the driving arm 33 of the movable armature assembly 30 and the movable contact 51, transmit the driving force, and have a good service life, the engaging end of the toggle member 60 and the movable contact 51 has a U-shaped bayonet 65, and the spring piece 52 on the movable contact 51 is embedded in the bayonet 65, and the engaging end of the toggle member 60 and the driving arm 33 has a through hole 67 along the outer extension direction of the driving arm 33, and the driving arm 33 is inserted into the through hole 67;

[0034] Furthermore, in order to reduce the weight of the toggle member 60 and make the toggle member 60 have a good force transmission effect, a weight-reducing hole is provided on the first force arm 64 of the toggle member 60 along the width direction, and at the same time, in order to make the toggle member 60 have good strength, a first reinforcing rib 63 is provided on the side of the first force arm 64 of the toggle member 60 away from the movable armature assembly 30 along the length direction; and a second reinforcing rib 66 is provided on the side of the second force arm 62 of the toggle member 60 close to the movable armature assembly 30 along the length direction, and the second reinforcing rib 66 extends to the junction of the first force arm 64 and the second force arm 62, and the toggle member 60 at the junction of the first force arm 64 and the second force arm 62 has a hinged portion extending outwards on both sides;

[0035] like Figure 4-6As shown, in another embodiment, in order to make the connection between the second force arm 62 of the toggle member 60 and the driving arm 33 more stable, the end of the second force arm 62 of the toggle member 60 has an elliptical connecting plate, and the connecting plate is provided with an elliptical connecting hole 61. The connecting part of the driving arm 33 is a double-ear connecting part 31, and the double-ear connecting part 31 is provided with a through pin hole. The connecting plate of the second force arm 62 is inserted between the double-ear connecting parts 33 of the driving arm 31, and then a pin shaft 70 is passed through the second force arm 62 from one side of the double-ear connecting part 33 to the other side of the double-ear connecting part 33, so that the pin shaft 70 is inserted into the connecting hole 61. During the rotation of the driving arm 33, the pin shaft 70 moves in the connecting hole 61.

[0036] A stationary contact assembly 80 is provided in the relay base 10 between the movable armature assembly 30 and the movable contact assembly 50, so the toggle member 60 needs to pass through the stationary contact assembly 80, the stationary contact assembly 80 is provided with a through hole penetrating the stationary contact assembly 80, and the second force arm 62 of the toggle member 60 passes through the stationary contact assembly 80 and is connected with the driving arm 33 of the movable armature assembly 30;

[0037] like Figure 7 As shown, after the electromagnetic coil of the electromagnet assembly 20 is excited, the magnetic pole changes, and attracts / repulses the movable armature assembly 30, so that the movable armature assembly 30 moves. The driving arm 33 of the movable armature assembly 30 drives the toggle member 60 to rotate around the pivot center through the second force arm 62, and the first force arm 64 of the toggle member 60 drives the movable contact assembly 50 to move, so as to realize the opening / closing of the movable / static contact. Since the length L1 of the first force arm 64 of the toggle member 60 is greater than the length L2 of the second force arm 62, the translation component B of the first force arm 64 along the opening / closing movement direction of the movable / static contact is greater than the translation component A of the second force arm 62 along the opening / closing movement direction of the movable / static contact. In this way, when the effective force arm length of the movable armature assembly 30 and the rotation angle of the movable armature assembly remain unchanged, the distance between the movable contact 51 and the static contact is increased.

[0038] Furthermore, a block 32 is provided on the driving arm 33, and a micro switch 40 is provided on the relay base 10. The moving armature assembly 30 can drive the moving reed 41 of the micro switch 40 to rotate during the process of rotating the switch, thereby forming contact and disconnection with the static reed 42 of the micro switch 40.

[0039] 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 magnetic latching relay with large opening distance and high reliability, 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: A toggle member is provided in the relay base between the movable armature assembly and the movable contact assembly, the toggle member is pivotally connected in the relay base, one end of the toggle member is engaged with the driving arm of the movable armature assembly, and the other end of the toggle member is engaged with the spring piece of the movable contact assembly; A first lever arm length from the pivot center of the toggle member to the spring of the movable contact assembly is greater than a second lever arm length from the pivot center of the toggle member to the driving arm of the movable armature assembly.

2. A magnetic latching relay with large opening distance and high reliability according to claim 1, characterized in that: An included angle formed by the first lever arm and the second lever arm is greater than 90 degrees and less than 180 degrees.

3. A magnetic latching relay with large opening distance and high reliability according to claim 1, characterized in that: The connecting end between the toggle member and the moving contact has a U-shaped bayonet, the spring piece on the moving contact is embedded in the bayonet, and the connecting end between the toggle member and the driving arm has a through hole along the outer extension direction of the driving arm, and the driving arm is inserted into the through hole.

4. A magnetic latching relay with large opening distance and high reliability according to claim 1, characterized in that: The end of the second force arm of the toggle member has an elliptical connecting plate, and the connecting plate is provided with an elliptical connecting hole. The connecting part of the driving arm is a double-ear connecting part, and the double-ear connecting part is provided with a through pin hole. The connecting plate of the second force arm is inserted between the double-ear connecting parts of the driving arm, and a pin shaft passes through the second force arm from one side of the double-ear connecting part to the other side of the double-ear connecting part.

5. A magnetic latching relay with large opening distance and high reliability according to claim 3 or 4, characterized in that: A weight-reducing hole is provided on the first force arm of the toggle member along the width direction.

6. A magnetic latching relay with large opening distance and high reliability according to claim 3 or 4, characterized in that: A first reinforcing rib is provided on the side of the first lever arm of the toggle member away from the movable armature assembly along the length direction; a second reinforcing rib is provided on the side of the second lever arm of the toggle member close to the movable armature assembly along the length direction, and the second reinforcing rib extends to the junction of the first lever arm and the second lever arm.

7. A magnetic latching relay with large opening distance and high reliability according to claim 1, characterized in that: The driving arm is provided with a block, the relay base is provided with a micro switch, and the movable armature assembly can drive the movable reed of the micro switch to rotate during the process of rotating the opening and closing, thereby forming contact and disconnection with the static reed of the micro switch.

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