A high-power DC relay

Abstract

The application discloses a high-power DC relay in the technical field of relays, which comprises a shell, copper columns and copper plates arranged in the shell, two groups of guide shafts symmetrically arranged in the shell and two groups of racks slidingly installed on the two groups of guide shafts, and the two groups of racks are symmetrically connected with the copper plates to drive the copper plates to contact or separate from the copper columns; the shell is provided with driving gears meshing with the two groups of racks and motors for driving the driving gears to rotate; in the application, the two groups of racks are symmetrically connected with the copper plates, the movement of the copper plates is driven by the two groups of racks, the thrust for driving the copper plates to move is not concentrated in one area, the stability of the copper plates during movement is ensured, the distance of contact point breakage is set according to requirements, and arc breaking is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, in particular to a high-power DC relay. BACKGROUND

[0002] A relay is an electric control device. In the prior art, the existing relays generally adopt electromagnetic driving or mechanical driving to make the moving contact move to contact or separate from the stationary contact. However, the moving end of the electromagnetic driving or mechanical driving is generally connected to the moving contact at a single point, so that the force of the electromagnetic driving or mechanical driving on the moving contact is concentrated in one area, resulting in poor stability of the moving contact and small spacing between the contacts when the contacts are separated. SUMMARY

[0003] The present application aims to provide a high-power DC relay to solve the problems of the prior art, i.e., the moving end of the electromagnetic driving or mechanical driving is generally connected to the moving contact at a single point, so that the force of the electromagnetic driving or mechanical driving on the moving contact is concentrated in one area, resulting in poor stability of the moving contact and small spacing between the contacts when the contacts are separated.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a high-power DC relay, comprising a shell and a copper column and a copper plate arranged in the shell, and further comprising two groups of guide shafts symmetrically arranged in the shell and two groups of racks slidably installed on the two groups of guide shafts.

[0005] The two groups of racks are symmetrically connected to the copper plate to drive the copper plate to contact or separate from the copper column. The shell is provided with driving gears meshing with the two groups of racks and a motor for driving the driving gears to rotate.

[0006] Preferably, the shell is provided with a worm gear for driving the driving gears to rotate, and the output shaft of the motor is provided with a worm meshing with the worm gear.

[0007] Preferably, the two groups of driving gears mesh with each other, and one of the driving gears meshes with the worm gear.

[0008] Preferably, the driving gear comprises a rotating shaft rotatably installed in the shell and a large gear and a small gear sleeved on the rotating shaft. The worm gear comprises a rotating rod rotatably installed in the shell and a driven worm gear and a driving gear sleeved on the rotating rod. The diameter of the driven worm gear is greater than that of the driving gear. The driven worm gear meshes with the worm. One of the large gears meshes with the other large gear and the driving gear. The small gear meshes with the rack.

[0009] As preferred, the ends of the two groups of the racks are provided with ceramic holders, the two groups of the racks are symmetrically connected with the ceramic holders, a guide rod and a connecting spring connected with the guide rod are slidably arranged on the ceramic holder, and the copper plate is arranged on the end of the guide rod.

[0010] The guide rod has two groups, and the two groups of the guide rods are symmetrically arranged on the ceramic holder.

[0011] As preferred, a guide rail shaft is arranged in the shell, the ceramic holder is slidably arranged on the guide rail shaft, and a spring member for supporting the ceramic holder is arranged on the guide rail shaft.

[0012] As preferred, the guide rail shaft has two groups, and the two groups of the guide rail shafts are symmetrically arranged on the two sides of the ceramic holder.

[0013] As preferred, a ceramic grid is arranged in the shell, and a magnet is arranged on the outer side of the ceramic grid.

[0014] Compared with the prior art, the application has the beneficial effects that in the application, the copper plate is driven to move by the two groups of racks, so that the thrust for driving the copper plate to move is not concentrated in one area, the stability of the copper plate during movement is ensured, the force on the contact is balanced, and the distance between the contacts can be ensured to be interrupted according to the requirement. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the application;

[0016] Figure 2 It is a connection structure schematic diagram of the copper plate and the ceramic holder of the application;

[0017] Figure 3 It is a connection structure schematic diagram of the driving gear and the rack of the application.

[0018] In the figure: 1, shell; 2, copper column; 3, copper plate; 4, ceramic holder; 5, guide rail shaft; 6, spring member; 7, connecting spring; 8, ceramic grid; 9, rack; 10, guide shaft; 11, motor; 12, worm; 13, worm gear; 14, driving gear; 141, rotating shaft; 142, large gear; 143, small gear. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0020] Embodiment 1

[0021] Please refer to Figure 1 and Figure 2 A high-power DC relay, comprising: a shell 1, the shell 1 is provided with a copper column 2 and a copper plate 3, the end of the copper column 2 extends to the outside of the shell 1; two sets of guide shafts 10 are symmetrically installed inside the shell 1, a rack 9 is slidably installed on each guide shaft 10; the two sets of racks 9 are symmetrically connected with the copper plate 3; two sets of drive gears 14 are rotatably arranged in the shell 1, the two sets of drive gears 14 are respectively engaged with the two sets of racks 9, a motor 11 is installed inside the shell 1, and the output end of the motor 11 is connected with the drive gears 14, for driving the drive gears 14 to rotate.

[0022] It should be noted that the working mode of the relay is that the motor 11 is energized to work, driving the two sets of drive gears 14 to rotate, so that the two sets of racks 9 move together to push the copper plate 3 to move, so that it is attached to the copper column 2, and the closing of the relay is completed; when opening, the motor 11 is energized to work, driving the two sets of drive gears 14 to rotate in the opposite direction (opposite to the rotating direction of the drive gears 14 when closing), so that the two sets of racks 9 move together to pull the copper plate 3 to move, so that it is separated from the copper column 2; so that the force of moving with the copper plate 3 is not concentrated in one area, ensuring the stability of the movement of the copper plate 3.

[0023] In this embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 2 A worm 12 is rotatably arranged in the shell 1, the output shaft of the motor 11 is provided with a worm 12, the worm 12 is engaged with the worm 13; the two sets of drive gears 14 are engaged with each other, one of the two sets of drive gears 14 is engaged with the worm 13; the motor 11 is energized to work, driving the worm 12 to rotate with the worm 13; when the worm 13 rotates, one of the two sets of drive gears 14 will rotate, and since the two sets of drive gears 14 are engaged, the rotation of one of the two sets of drive gears 14 will drive the other set of drive gears 14 to rotate.

[0024] In this embodiment, as a further optimized scheme, please refer to Figure 3The driving gear 14 comprises a rotating shaft 141, a large gear 142 and a small gear 143; the rotating shaft 141 is rotatably installed in the inside of the shell 1, and the large gear 142 and the small gear 143 are fixedly sleeved on the outer wall of the rotating shaft 141; the worm wheel 13 comprises a rotating rod, a driven worm wheel and a driving gear, the rotating rod is rotatably installed in the inside of the shell 1, and the driven worm wheel and the driving gear are fixedly sleeved on the rotating rod; the diameter of the driven worm wheel is larger than that of the driving gear (when the worm 12 rotates with the worm wheel 13, the rotation speed of the driving gear 14 will be reduced through the transmission of the driven worm wheel and the driving gear with different diameters), the driven worm wheel is engaged with the worm 12, one group of large gears 142 is engaged with the other group of large gears 142 and the driving gear respectively, and two groups of small gears 143 are engaged with two groups of racks 9 respectively; the motor 11 rotates with the worm 12 to drive the driven worm wheel to rotate, so that the rotating rod rotates with the driving gear; when the driving gear rotates with one group of large gears 142, two groups of rotating shafts 141 will rotate with two groups of small gears 143 through the engagement of two groups of large gears 142, so as to drive two groups of racks 9 to move; the moving speed of the rack 9 is slowed down through the cooperation of the large gear 142 and the small gear 143, so as to ensure the stability of the movement of the copper plate 3.

[0025] In this embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 2The end of the two groups of racks 9 is provided with a ceramic bracket 4, and the two groups of racks 9 are symmetrically connected with the ceramic bracket 4; the ceramic bracket 4 is provided with a guide hole, a guide rod is slidingly inserted into the guide hole (the moving direction of the guide rod is the same as the moving direction of the rack 9), and a connecting spring 7 is installed between the ceramic bracket 4 and the guide rod; the copper plate 3 is installed on the end of the guide rod; the guide rod has two groups, and the two groups of guide rods are symmetrically arranged on the ceramic bracket 4, and the two groups of guide rods are also symmetrically connected with the copper plate 3; the housing 1 is provided with a guide rail shaft 5, the ceramic bracket 4 is slidingly installed on the guide rail shaft 5, the guide rail shaft 5 is sleeved with a spring piece 6, and the guide rail shaft 5 has two groups, which are symmetrically installed on the two sides of the ceramic bracket 4; through the symmetrically arranged guide rail shaft 5 and the symmetrically arranged guide rod, the force balance of the copper plate 3 during movement is ensured, and the stability of the copper plate 3 during movement is ensured; during the closing process, the rack 9 moves with the ceramic bracket 4, so that the copper plate 3 approaches the copper column 2; after the copper plate 3 contacts the copper column 2, the ceramic bracket 4 continues to move under the pushing of the rack 9, which will make the ceramic bracket 4 close to the copper plate 3, compress the connecting spring 7, and the connecting spring 7 will exert a pressure on the copper plate 3 (so that the copper plate 3 can be fully attached to the copper column 2), when the rack 9 moves to the last tooth of the tooth engagement, the rack 9 cannot move, and the relay closing is completed; during the opening process, the two groups of racks 9 move reversely and jointly pull the ceramic bracket 4 to move in the opposite direction, so that the copper plate 3 is separated from the copper column 2, until the last tooth of the rack 9 engagement, the opening action is completed, and the ceramic bracket 4 will press the spring piece 6 (so that the spring piece 6 is compressed) after returning, the spring piece 6 exerts a counter force on the ceramic bracket 4, so that the rack 9 is engaged with the driving gear 14 and will not be disengaged, and it is ensured that the driving gear 14 can normally move with the rack 9.

[0026] In this embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 2 , the housing 1 is provided with a ceramic grid 8, and the outer side of the ceramic grid 8 is provided with a magnet; when an arc is generated during the opening process, the magnetic field formed by the magnet blows the arc to the ceramic grid 8 for arc extinguishing.

[0027] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high power DC relay comprising: The shell (1) and the copper column (2) and the copper plate (3) arranged in the shell (1) are characterized in that: further comprising: two groups of guide shafts (10) symmetrically arranged in the shell (1) and two groups of racks (9) respectively slidingly installed on the two groups of guide shafts (10); The two groups of racks (9) are symmetrically connected with the copper plate (3) to drive the copper plate (3) to contact or separate from the copper column (2), and the shell (1) is provided with driving gears (14) engaged with the two groups of racks (9) respectively and a motor (11) for driving the driving gears (14) to rotate; The shell (1) is provided with a worm gear (13) for driving the driving gears (14) to rotate, and the output shaft of the motor (11) is provided with a worm (12) engaged with the worm gear (13); The end of the two groups of racks (9) is provided with a ceramic bracket (4), and the two groups of racks (9) are symmetrically connected with the ceramic bracket (4), the ceramic bracket (4) is slidingly provided with a guide rod and a connecting spring (7) connected with the guide rod, and the copper plate (3) is installed on the end of the guide rod. Wherein, the guide rod has two groups, and the two groups of guide rods are symmetrically arranged on the ceramic bracket (4).

2. A high power DC relay according to claim 1, characterized in that: The two groups of driving gears (14) are engaged with each other, and one group of the driving gears (14) is engaged with the worm gear (13).

3. A high power DC relay according to claim 2, characterized in that: The driving gear (14) comprises a rotating shaft (141) rotatably installed in the shell (1), a large gear (142) sleeved on the rotating shaft (141), and a small gear (143); the worm gear (13) comprises a rotating rod rotatably arranged in the shell (1), a driven worm gear sleeved on the rotating rod, and a driving gear, the diameter of the driven worm gear is greater than that of the driving gear, the driven worm gear is engaged with the worm (12), one group of the large gears (142) is respectively engaged with the other group of the large gears (142) and the driving gear, and the small gear (143) is engaged with the rack (9).

4. A high power DC relay according to claim 1, characterized in that: The shell (1) is provided with a guide rail shaft (5), the ceramic bracket (4) is slidingly installed on the guide rail shaft (5), and the guide rail shaft (5) is provided with a spring piece (6) for supporting the ceramic bracket (4).

5. A high power DC relay according to claim 4, characterized in that: The guide rail shaft (5) has two groups, and the two groups of guide rail shafts (5) are symmetrically installed on the two sides of the ceramic bracket (4).

6. A high power DC relay according to claim 1, characterized in that: The shell (1) is provided with a ceramic grid (8), and the outer side of the ceramic grid (8) is provided with a magnet.

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