Mechanical holding relay

Abstract

The utility model relates to a mechanical holding relay, which comprises a relay base and an upper cover in buckling connection, a driving motor is arranged in the relay base, and the driving motor is connected with at least two movable contact plates rotating around a shaft through a gear transmission mechanism. One end of the movable contact plate is connected with a conductive sheet arranged on the relay base through a flexible conductive piece, the other end of the movable contact plate is provided with a movable contact, the relay base is also provided with a static sheet, the static sheet is provided with a static contact, and the movable contact is in contact with or separated from the static contact; the beneficial effects are that 1, the driving motor drives the movable contact plate to rotate positively and negatively through the gear transmission mechanism to realize opening and closing of the switch; 2, two stroke limit switches are arranged on the circuit board to control the opening and closing positions, and the control switch can automatically cut off the power supply of the motor after the opening and closing are in place, so that the over-stroke action is avoided;

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a mechanical holding relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger current, thus playing roles in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] There are many types of relays, such as electromagnetic relays, time relays, temperature relays, and motor relays. Relays mainly consist of a drive mechanism and a contact mechanism. The contact mechanism generally consists of a stationary spring and a movable spring. The drive mechanism moves the movable spring to achieve the connection or disconnection of the contact mechanism.

[0004] Existing motor relays mainly utilize the motor to drive the moving spring through a transmission unit. However, the design of existing motor relays is unreasonable. When the motor stops, the reaction of the moving spring often causes the transmission unit to reverse, resulting in a change in the relay's state and its failure. This is not conducive to improving the performance of the relay. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a mechanical holding relay.

[0006] To achieve the above objectives, the technical solution of this utility model is to design a mechanically holding relay, including a relay base and a snap-fit ​​upper cover. The relay base is equipped with a drive motor, which is connected to at least two moving contact plates through a gear transmission mechanism. One end of each moving contact plate is connected to a conductive sheet disposed on the relay base through a flexible conductive element, and the other end of each moving contact plate is provided with a moving contact. The relay base is also provided with an electrostatic sheet, on which a stationary contact is provided. The moving contact is in contact with or separates from the stationary contact.

[0007] A further preferred technical solution is that the gear transmission mechanism includes a worm gear, which meshes with a worm wheel disposed within the relay base. The axle of the worm wheel is vertically disposed within the relay base. A coaxial drive gear is provided on one side of the worm wheel, and the drive gear meshes with a transmission gear disposed within the relay base. The transmission gear is disposed within the relay base on the side of the worm wheel away from the worm gear. The transmission gear is composed of two coaxial semi-circular teeth, which are stacked together and located on opposite sides of the gear shaft. The transmission gear is vertically disposed within the relay base, and the drive gear meshes with the lower semi-circular teeth.

[0008] A driven gear is provided in the relay base on the side of the transmission gear away from the drive gear. The driven gear meshes with the semi-circular teeth of the transmission gear located above it. The driven gear has arc-shaped teeth that are less than 1 / 4 of a circle.

[0009] In a further preferred embodiment, mounting seats are provided on both sides of the driven gear. Each mounting seat has an arc-shaped mounting portion coaxial with the driven gear shaft. The arc-shaped mounting portion is arranged around the outer side of the driven gear shaft to form an arc-shaped mounting groove with the driven gear shaft. A movable contact plate is provided in each arc-shaped mounting groove. A semi-circular arc rotating portion is also provided on one side of the middle of the movable contact plate near the end. The movable contact plate is clamped in the arc-shaped mounting groove through the semi-circular arc rotating portion thereon.

[0010] In a further preferred embodiment, a spring is connected between the moving contact plate and the driven gear, with one end of the spring abutting against the mounting base and the other end of the spring abutting against the moving contact plate near the moving contact point.

[0011] In a further preferred embodiment, the relay base is further provided with a circuit board, on which two limit switches are provided, and at the corresponding position of the transmission gear are provided trigger elements that match the limit switches.

[0012] In a further preferred embodiment, the gear transmission mechanism includes a drive gear that meshes with a first transmission gear. A second transmission gear is stacked on one side of the first transmission gear. The second transmission gear meshes with a third transmission gear located away from the drive motor. A fourth transmission gear is stacked on one side of the third transmission gear. The fourth transmission gear meshes with a fifth transmission gear located away from the first transmission gear. A sixth transmission gear is stacked on the fifth transmission gear. The sixth transmission gear meshes with a seventh transmission gear on one side. The seventh transmission gear is coaxially arranged with the third and fourth transmission gears.

[0013] In a further preferred embodiment, the seventh transmission gear is provided with a stacked cam, which cooperates with a rocker arm disposed within the relay base. The rocker arm is provided with a cam groove that cooperates with the cam. Mounting seats are provided on both sides of the rocker arm, and each mounting seat has an arc-shaped mounting portion coaxial with the rocker arm. The arc-shaped mounting portion is arranged around the outside of the rocker arm shaft to form an arc-shaped mounting groove with the rocker arm shaft. A movable contact plate is provided in each arc-shaped mounting groove, and a semi-circular arc rotating portion is also provided on one side of the middle of the movable contact plate near the end. The movable contact plate is clamped in the arc-shaped mounting groove through the semi-circular arc rotating portion thereon.

[0014] In a further preferred embodiment, a spring is connected between the movable contact plate and the rocker arm. The spring is mounted on the rocker arm shaft, with one end of the spring abutting against the mounting base and the other end of the spring abutting against the movable contact plate near the movable contact point.

[0015] In a further preferred embodiment, the relay base is further provided with a circuit board, on which two limit switches are provided, and the corresponding position of the rocker arm is provided with a trigger element that matches the limit switches.

[0016] In a further preferred embodiment, an arc-extinguishing chamber is provided inside the relay base on one side of the stationary contact, an arc-extinguishing grid is provided inside the arc-extinguishing chamber, and an arc-inducing plate is provided on one side of the arc-extinguishing chamber.

[0017] The advantages and beneficial effects of this utility model are as follows: 1. The drive motor drives the moving contact plate to rotate forward and backward through the gear transmission mechanism to realize the opening and closing of the switch; 2. Two travel limit switches are set on the circuit board to control the opening and closing position. After the opening and closing is in place, the control switch can automatically cut off the power supply to the motor to ensure that it will not exceed the travel limit. Attached Figure Description

[0018] Figure 1 This is an isometric view of the first embodiment of the present invention without a top cover;

[0019] Figure 2 This is a top view of the first embodiment of the present invention without the top cover;

[0020] Figure 3 This is an isometric view of the gear transmission structure of the first embodiment of this utility model;

[0021] Figure 4 This is an isometric drawing of the moving contact plate assembly according to the first embodiment of this utility model;

[0022] Figure 5 This is an isometric view of the limit switch according to the first embodiment of this utility model;

[0023] Figure 6 This is one of the isometric views of the second embodiment of this utility model without the top cover;

[0024] Figure 7 This is a second top view of the second embodiment of the present invention without the top cover;

[0025] Figure 8 This is an isometric view of the gear transmission structure of the second embodiment of this utility model;

[0026] Figure 9 This is an isometric drawing of the moving contact plate assembly according to the second embodiment of this utility model;

[0027] Figure 10 This is an isometric view of the limit switch according to the second embodiment of this utility model;

[0028] In the diagram: 10. Relay base; 20. Drive motor; 31. Worm gear; 32. Worm wheel; 33. Drive gear; 34. Transmission gear; 35. Semi-circular toothed part; 36. Driven gear; 361. Arc-shaped mounting groove; 37. Cam; 38. Rocker arm; 391. First transmission gear; 392. Second transmission gear; 393. Third transmission gear; 394. Fourth transmission gear; 395. Fifth transmission gear; 396. Sixth transmission gear; 397. Seventh transmission gear; 41. First limit switch; 42. Second limit switch; 43. Trigger element; 44. Circuit board; 50. Moving contact plate; 51. Moving contact; 60. Conductive sheet; 70. Spring; 80. Static plate; 81. Stationary contact; 90. Arc extinguishing chamber. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] This application provides a mechanically held relay, including a relay base 10 and a snap-fit ​​upper cover. The relay base 10 is provided with a drive motor 20, which drives a moving contact plate 50 to reciprocate through a gear transmission mechanism. In one embodiment, the gear transmission mechanism can also drive the moving contact plate 50 to reciprocate through a rocker mechanism. The moving contact plate 50 is connected to a conductive sheet 60 through a flexible conductive element. The moving contact plate 50 is provided with a moving contact 51. The relay base 10 is also provided with an electrostatic sheet 80, which is provided with a stationary contact 81. The moving contact 51 and the stationary contact 81 are attracted or disconnected. Specifically, the following embodiments will provide a detailed description.

[0031] Example 1

[0032] like Figure 1-5As shown, a mechanically held relay includes a relay base 10 and a snap-fitted upper cover. A drive motor 20 is housed within the relay base 10, and the drive motor 20 is horizontally positioned within the relay base 10, with its main shaft also horizontally aligned. A worm gear 31 is mounted on the main shaft of the drive motor 20. The worm gear 31 can be fitted onto the main shaft or directly machined from the main shaft. The worm gear 31 meshes with a worm wheel 32 disposed within the relay base 10. The worm gear 32 is vertically mounted inside the relay base 10, and the worm wheel 32 is horizontally mounted. A drive gear 33 is provided on one side of the worm wheel 32. The drive gear 33 is coaxial with the worm wheel 32. In order to facilitate the miniaturization of the relay and make reasonable use of space, the drive gear 33 is preferably located below the worm wheel 32, so as to make reasonable use of the space below the worm wheel 32. The drive motor 20 drives the worm 31 to rotate, the worm 31 drives the worm wheel 32 to rotate, and the drive gear 33 rotates synchronously with the worm wheel 32.

[0033] The drive gear 33 and the worm gear 32 can be integrated into one structure, which can improve strength, reduce intermediate connecting structures, and facilitate structural optimization.

[0034] The drive gear 33 meshes with a transmission gear 34 disposed within the relay base 10. The transmission gear 34 is disposed within the relay base 10 on the side of the worm wheel 32 away from the worm 31. The transmission gear 34 is composed of two coaxial semi-circular teeth 35, which are stacked together and located on opposite sides of the gear shaft. The transmission gear 34 is vertically disposed within the relay base 10, and the drive gear 33 meshes with the lower semi-circular teeth 35.

[0035] A driven gear 36 is provided in the relay base 10 on the side of the transmission gear 34 away from the drive gear 33. The driven gear 36 meshes with the semi-circular tooth 35 of the transmission gear 34 located above it. The driven gear 36 has an arc-shaped tooth with a diameter less than 1 / 4 circle. Mounting seats are provided on both sides of the driven gear 36. The mounting seats have arc-shaped mounting portions coaxial with the driven gear shaft. The arc-shaped mounting portions are arranged around the outside of the driven gear shaft to form an arc-shaped mounting groove 361 with the driven gear shaft. A moving contact plate 50 is provided in each arc-shaped mounting groove 361. A semi-circular rotating portion is also provided on one side of the middle of the moving contact plate 50 near the end. The moving contact plate 50 is clamped in the arc-shaped mounting groove 361 through its semi-circular rotating portion and rotates synchronously with the driven gear 36 under the drive of the mounting seat.

[0036] Each of the moving contact plates 50 has a moving contact 51 at one end away from the arc-shaped mounting portion. The end of the moving contact plate 50 away from the moving contact 51 is connected to the conductive sheet 60 through a flexible conductive element. The conductive sheet 60 is disposed in the relay base 10 on the side of the moving contact plate 50 away from the driven gear 36.

[0037] The movable contact plate 50 is provided with a magnetic attractor near the movable contact 51. The magnetic attractor has a U-shaped structure and is mounted on the movable contact plate 50 from the side of the movable contact plate 50 closest to the drive motor 20. The electrostatic sheet 80 is also provided with a magnetic attractor near the stationary contact 81. The magnetic attractor is made of a high magnetic permeability material. When the movable and stationary contacts are closed, current enters the movable contact plate 50 from the electrostatic sheet 80. After being energized, the movable contact plate 50 magnetizes the magnetic attractor on the movable contact plate 50. The magnetic attractor is magnetic and attracts the magnetic attractor on the electrostatic sheet 80 to ensure a tighter fit between the movable contact 51 and the stationary contact 81.

[0038] A spring 70 is also connected between the moving contact plate 50 and the driven gear 36 to provide contact pressure. The spring 70 is preferably a torsion spring, which is mounted on the driven gear shaft. One end of the torsion spring abuts against the mounting base, and the other end of the torsion spring abuts against the moving contact plate 50 near the moving contact 51. This helps to push the moving contact plate 50 to rotate, providing contact pressure for the moving contact 51 to engage with the stationary contact 81.

[0039] The flexible conductive component is preferably a copper braided wire. The movable contact plate 50 is connected to the conductive sheet 60 through the copper braided wire, and the flexible copper braided wire increases the rotation angle of the movable contact plate 50 after connection.

[0040] An arc-extinguishing chamber 90 is also provided in the relay base 10 on one side of the stationary contact 81. An arc-extinguishing grid is provided in the arc-extinguishing chamber 90, and an arc-inducing plate is provided on one side of the arc-extinguishing chamber. When the moving contact 51 is separated from the stationary contact 81, the arc is guided to the arc-extinguishing chamber by the arc-inducing plate of the electrostatic plate 80 to eliminate the arc generated when the contact is separated.

[0041] A circuit board 44 is also provided in the relay base 10 between the transmission gear 34 and the driven gear 36. The circuit board 44 is provided with a first limit switch 41 and a second limit switch 42. The first limit switch 41 and the second limit switch 42 are respectively located on both sides of the line connecting the center of the transmission gear 34 and the center of the driven gear 36, so that the two limit switches control the rotation angle of the driven gear 36 to both sides, so that the driven gear 36 reciprocates within a certain angle range. A trigger 43 matching the limit switch is provided at the corresponding position of the transmission gear 34. The trigger 43 is fixedly installed on the transmission gear 34, and rotates with the transmission gear 34 to press the limit switch, so as to change the working state of the limit switch.

[0042] The relay base 10 has a circuit board 44 at its bottom. The circuit board 44 has two travel limit switches that control the opening and closing positions. After the opening and closing positions are reached, the control switches can automatically cut off the power to the drive motor 20 to ensure that it will not exceed the travel limit.

[0043] Example 2

[0044] like Figure 6-10As shown, a mechanically held relay includes a relay base 10 and a snap-fitted upper cover. A drive motor 20 is housed within the relay base 10, with the drive motor 20 vertically positioned within the base 10, its main shaft also vertically aligned. A drive gear 33 is mounted on the main shaft of the drive motor 20, meshing with a first transmission gear 391. A second transmission gear 392 is stacked on one side of the first transmission gear 391, meshing with a third transmission gear 393 located away from the drive motor 20. A fourth transmission gear 394 is stacked on one side of the third transmission gear 393, meshing with a fifth transmission gear 395 located away from the first transmission gear 391. A sixth transmission gear 395 is stacked on the fifth transmission gear 395. 96. The sixth transmission gear 396 meshes with the seventh transmission gear 397 on one side. The seventh transmission gear 397 is coaxially arranged with the third transmission gear 393 and the fourth transmission gear 394. The seventh transmission gear 397 is provided with a stacked cam 37. The cam 37 cooperates with a rocker arm 38 provided in the relay base 10. The rocker arm 38 is provided with a cam groove that cooperates with the cam 37. Mounting seats are provided on both sides of the rocker arm 38. The mounting seats have an arc-shaped mounting part coaxial with the rocker arm 38. The arc-shaped mounting part is arranged around the outside of the rocker arm shaft and forms an arc-shaped mounting groove with the rocker arm 38 shaft. A movable contact plate 50 is provided in each arc-shaped mounting groove. A semi-circular arc rotating part is also provided on one side of the middle of the movable contact plate 50 near the end. The movable contact plate 50 is clamped in the arc-shaped mounting groove through the semi-circular arc rotating part thereon.

[0045] Each of the movable contact plates 50 has a movable contact 51 at one end away from the arc-shaped mounting portion. The end of the movable contact plate 50 away from the movable contact is connected to the conductive sheet 60 through a flexible conductive element. The conductive sheet 60 is disposed in the relay base 10 on the side of the movable contact plate 50 away from the rocker arm 38.

[0046] The movable contact plate 50 is provided with a magnetic attractor near the movable contact 51. The magnetic attractor has a U-shaped structure and is mounted on the movable contact plate 50 from the side of the movable contact plate 50 closest to the drive motor 10. The electrostatic sheet 80 is also provided with a magnetic attractor near the stationary contact 51. The magnetic attractor is made of a high magnetic permeability material. When the movable and stationary contacts are closed, current enters the movable contact plate 50 from the electrostatic sheet 80. After being energized, the movable contact plate 50 magnetizes the magnetic attractor on the movable contact plate 50. The magnetic attractor is magnetic and attracts the magnetic attractor on the electrostatic sheet 80 to ensure a tighter fit between the movable contact 51 and the stationary contact 81.

[0047] A spring 70 is also connected between the movable contact plate 50 and the rocker arm 38 to provide contact pressure. The spring 70 is preferably a torsion spring, which is mounted on the rocker arm shaft. One end of the torsion spring abuts against the mounting base, and the other end of the torsion spring abuts against the movable contact plate 50 near the movable contact 51. This helps to push the movable contact plate 50 to rotate, providing contact pressure for the movable contact 51 to engage with the stationary contact 81.

[0048] The flexible conductive component is preferably a copper braided wire. The movable contact plate 50 is connected to the conductive sheet 60 through the copper braided wire, and the flexible copper braided wire increases the rotation angle of the movable contact plate 50 after connection.

[0049] An arc-extinguishing chamber 90 is also provided in the relay base 10 on one side of the stationary contact 81. An arc-extinguishing grid is provided in the arc-extinguishing chamber 90, and an arc-inducing plate is provided on one side of the arc-extinguishing chamber 90. When the moving contact 51 is separated from the stationary contact 81, the arc is guided to the arc-extinguishing chamber 90 by the arc-inducing plate of the electrostatic sheet 80 to eliminate the arc generated when the contact is separated.

[0050] A circuit board 44 is also provided inside the relay base 10. The circuit board 44 is provided with a first limit switch 41 and a second limit switch 42. The first limit switch 41 and the second limit switch 42 are respectively located on both sides of the rocker arm 38, so that the two limit switches control the rotation angle of the rocker arm 38, so that the rocker arm 38 reciprocates within a certain angle range. A trigger 43 matching the limit switch is provided at the corresponding position of the rocker arm 38. The trigger 43 is fixedly installed on the rocker arm 38, and rotates back and forth with the rocker arm 38, and touches the limit switch, so that the working state of the limit switch changes.

[0051] The circuit board 44 is equipped with two travel limit switches to control the opening and closing positions. After the opening and closing positions are reached, the control switches can automatically cut off the power supply to the drive motor 20 to ensure that the travel will not exceed the limit.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A mechanically retaining relay, comprising a relay base and a snap-fit ​​upper cover, characterized in that, The relay base is equipped with a drive motor, which is connected to at least two movable contact plates that rotate around an axis through a gear transmission mechanism. One end of each movable contact plate is connected to a conductive sheet disposed on the relay base through a flexible conductive element, and the other end of each movable contact plate is provided with a movable contact. The relay base is also provided with an electrostatic sheet, on which a stationary contact is provided. The movable contact is in contact with or separates from the stationary contact.

2. A mechanical holding relay according to claim 1, characterized in that, The gear transmission mechanism includes a worm gear that meshes with a worm wheel disposed within the relay base. The axle of the worm wheel is vertically disposed within the relay base. A coaxial drive gear is provided on one side of the worm wheel. The drive gear meshes with a transmission gear disposed within the relay base. The transmission gear is disposed within the relay base on the side of the worm wheel away from the worm gear. The transmission gear consists of two coaxial semi-circular teeth that are stacked together and located on opposite sides of the gear shaft. The transmission gear is vertically disposed within the relay base, and the drive gear meshes with the lower semi-circular tooth. A driven gear is provided in the relay base on the side of the transmission gear away from the drive gear. The driven gear meshes with the semi-circular teeth of the transmission gear located above it. The driven gear has arc-shaped teeth that are less than 1 / 4 of a circle.

3. A mechanical holding relay according to claim 2, characterized in that, Mounting seats are provided on both sides of the driven gear. Each mounting seat has an arc-shaped mounting portion coaxial with the driven gear shaft. The arc-shaped mounting portion is arranged around the outside of the driven gear shaft to form an arc-shaped mounting groove with the driven gear shaft. A movable contact plate is provided in each arc-shaped mounting groove. A semi-circular arc rotating portion is also provided on one side of the middle of the movable contact plate near the end. The movable contact plate is clamped in the arc-shaped mounting groove through the semi-circular arc rotating portion thereon.

4. A mechanical holding relay according to claim 3, characterized in that, A spring is also connected between the moving contact plate and the driven gear. One end of the spring abuts against the mounting base, and the other end of the spring abuts against the moving contact plate near the moving contact point.

5. A mechanically retaining relay according to claim 4, characterized in that, The relay base is also equipped with a circuit board, on which two limit switches are provided, and the corresponding position of the transmission gear is equipped with a trigger element that matches the limit switches.

6. A mechanical holding relay according to claim 1, characterized in that, The gear transmission mechanism includes a drive gear that meshes with a first transmission gear. A second transmission gear is stacked on one side of the first transmission gear. The second transmission gear meshes with a third transmission gear on the side away from the drive motor. A fourth transmission gear is stacked on one side of the third transmission gear. The fourth transmission gear meshes with a fifth transmission gear on the side away from the first transmission gear. A sixth transmission gear is stacked on the fifth transmission gear. The sixth transmission gear meshes with a seventh transmission gear on one side. The seventh transmission gear is coaxially arranged with the third and fourth transmission gears.

7. A mechanical holding relay according to claim 6, characterized in that, The seventh transmission gear is provided with a stacked cam, which cooperates with a rocker arm disposed in the relay base. The rocker arm is provided with a cam groove that cooperates with the cam. Mounting seats are provided on both sides of the rocker arm. The mounting seats have an arc-shaped mounting part coaxial with the rocker arm. The arc-shaped mounting part is arranged around the outside of the rocker arm shaft and forms an arc-shaped mounting groove with the rocker arm shaft. A movable contact plate is provided in each arc-shaped mounting groove. A semi-circular arc rotating part is also provided on one side of the middle of the movable contact plate near the end. The movable contact plate is clamped in the arc-shaped mounting groove through the semi-circular arc rotating part thereon.

8. A mechanical holding relay according to claim 7, characterized in that, A spring is also connected between the movable contact plate and the rocker arm. The spring is fitted on the rocker arm shaft. One end of the spring abuts against the mounting base, and the other end of the spring abuts against the movable contact plate near the movable contact point.

9. A mechanical holding relay according to claim 8, characterized in that, The relay base is also equipped with a circuit board, on which two limit switches are provided, and the corresponding position of the rocker arm is equipped with a trigger element that matches the limit switches.

10. A mechanically retaining relay according to any one of claims 1-6, characterized in that, An arc-extinguishing chamber is also provided inside the relay base on one side of the stationary contact. An arc-extinguishing grid is provided inside the arc-extinguishing chamber, and an arc-inducing plate is provided on one side of the arc-extinguishing chamber.

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