A multi-stage separation new energy high-voltage relay

Abstract

The present invention discloses a multi-stage separation new energy high-voltage relay, which relates to the field of automotive relays. A multi-stage separation new energy high-voltage relay comprises a relay housing, a first static contact and a second static contact are installed at the top of the relay housing, a sealing box and a coil are installed inside the relay housing, the coil is located below the sealing box, the sealing box is hollow inside, a moving iron core is installed in the middle of the coil, the top of the transmission shaft extends to the inside of the sealing box and is connected with a retaining frame, and a moving contact is installed at the top of the retaining frame. The present invention can rotate and connect the moving contact with the transmission shaft when the relay is powered on, and when connecting two groups of static contacts, the moving contact is tilted at an angle under the action of a torsion spring, and then in the connection process, one end of the moving contact is first connected to the first static contact, and then the second static contact is connected to the moving contact, thereby reducing the generation of arcs during connection.

Description

Technical Field

[0001] The present invention relates to the field of automobile relays, and in particular to a multi-stage separated new energy high-voltage relay. Background Art

[0002] High-voltage DC relays are key components in new energy vehicles. They are switching devices that can control larger currents with smaller currents and have a protective function. They play a vital role between the high-voltage battery pack and the motor controller of electric vehicles, ensuring that the electrical system can be safely connected and disconnected. When the vehicle stops working, it can isolate the circuit and connect the circuit when the vehicle is running. In addition, when the vehicle is turned off or a problem occurs, it can ensure that the energy storage system is safely separated from the vehicle's electrical system, disconnecting the circuit.

[0003] The internal structure of an existing high-voltage relay is usually composed of a housing, two sets of static contacts, two sets of moving contacts, a transmission rod, a magnet and an electromagnet. During use, the magnetic force between the electromagnet and the magnet is used to control the movement of the moving contact, thereby achieving the connection and closing of the relay.

[0004] However, during use of the prior art, an arc may be generated between the moving contact and the static contact when they are separated, and the arc may cause burning between the contacts. The existing contact cutting method usually directly separates the two sets of contacts, and an arc may be generated between them at the same time, causing unnecessary damage, and the molten contacts are prone to sticking together, thus affecting the use of the relay. For this reason, the existing relays use a variety of arc elimination methods, usually a grid or a relay filled with rare gas. The moving contact of the prior art adopts a segmented structure, which is limited by a spring. The vibration generated during the operation of the vehicle is transmitted to the relay, which will cause the moving contact to vibrate, causing the spring to shake repeatedly, affecting the service life of the relay. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a multi-stage separation new energy high-voltage relay to solve the technical problems of more arcs generated by the synchronous disconnection of two sets of contacts and easy shaking of the moving contacts.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-stage separated new energy high-voltage relay, comprising a relay housing, a first static contact and a second static contact are installed at the top of the relay housing, a sealing box and a coil are installed inside the relay housing, the coil is located below the sealing box, the inside of the sealing box is hollow, a moving iron core is installed in the middle position of the coil, a transmission shaft is installed in the middle position of the moving iron core, the top of the transmission shaft extends to the inside of the sealing box and is connected to a retaining frame, a moving contact is installed at the top of the retaining frame, a return spring and a torsion spring are installed at the connection position between the transmission shaft and the retaining frame, the return spring resets the retaining frame, the torsion spring drives the retaining frame and the moving contact to tilt at an angle, and the end of the moving contact close to the first static contact is tilted, and the moving contact drives the retaining frame to rotate around the transmission shaft after being fitted with the first static contact, an arc extinguisher is installed on the inner wall of the sealing box, and a locking mechanism is installed at the inner bottom of the sealing box.

[0007] By adopting the above technical solution, the moving contact can be conveniently and asynchronously connected to each group of static contacts, so that the arc is generated only once, reducing the damage of the arc to the equipment.

[0008] The present invention is further configured such that hanging ears are provided on both sides of the relay housing, a cover plate is installed on the top of the relay housing, and the first static contact and the second static contact are both fixed inside the cover plate, and a shielding cover is provided around the inner wall of the relay housing.

[0009] By adopting the above technical solution, the relay can be easily installed, and the relay can be protected by the shielding cover.

[0010] The present invention is further configured such that the return spring is sleeved on the outer wall of the transmission shaft, and the bottom end of the return spring is fixed to the inner wall of the sealing box, the top end of the transmission shaft is connected to a rotating part, a rotating shaft is installed inside the rotating part, the retaining frame is rotatably connected to the transmission shaft through the rotating part, and the torsion spring is sleeved on the outside of the rotating shaft of the rotating part.

[0011] By adopting the above technical solution, the transmission shaft can be driven to return through the return spring, so that the moving contact is separated from the static contact.

[0012] The present invention is further configured such that three groups of arc extinguishing grids are provided on the inner wall of the arc extinguisher, and the widths of the three groups of arc extinguishing grids increase equidistantly from top to bottom, and the arc extinguishing grids are aligned with the bottom ends of the first static contact and the second static contact.

[0013] By adopting the above technical solution, the electric arc can be extinguished through the arc extinguishing grid.

[0014] The present invention is further configured such that a fixed magnet is connected to the lower end of the retaining frame located below the second static contact, a mounting seat is installed on the inner wall of the sealing box directly below the fixed magnet, an adsorption iron sheet is connected to the top of the mounting seat, and the fixed magnet and the adsorption iron sheet are adsorbed to fix the moving contact.

[0015] By adopting the above technical solution, the fixed magnet can be adsorbed by the adsorbing iron sheet, thereby fixing the moving contact.

[0016] The present invention is further configured such that when the end of the moving contact is in contact with the second static contact, the fixed magnet is located on the side of the contacting position of the moving contact and the second static contact, and is located between the moving contact and the arc extinguisher; when the moving contact is separated from the second static contact, the magnetic force of the fixed magnet attracts the arc, causing the arc to enter the arc extinguisher.

[0017] By adopting the above technical solution, it is possible to conveniently fix the magnet to guide the arc, so that the arc can stably enter the arc extinguisher.

[0018] The present invention is further configured such that a clamping plate is connected to the bottom end of the retaining frame, and a hook is provided at the bottom end of the clamping plate; a clamping frame is installed on the inner wall of the sealing box below the clamping plate, and the clamping frame clamps the clamping plate.

[0019] By adopting the above technical solution, the clamping plate can be easily limited, thereby fixing the retaining frame.

[0020] The present invention is further configured such that an inclined surface and a slide groove are provided inside the engaging frame, and the inclined surface is also provided with two groups, and the two groups of inclined surfaces are symmetrically arranged at the bottom end of the slide groove, and a guide plate is symmetrically installed inside the slide groove, and an inclined plate matching the inclined surface is provided at the bottom end of the guide plate, a spring is installed between the two groups of guide plates, and a magnet is installed on the side of the guide plate, and a slide plate is sleeved on the top of each group of guide plates, and a limiting groove matching the slide plate is provided on the inner wall of the engaging frame, and a hook is connected to the top of the slide, and the hook engages the engaging plate.

[0021] By adopting the above technical solution, when the coil is started, the adsorption force of the magnet can drive the two sets of guide plates to slide along the inclined surface, thereby driving the guide plates to separate to both sides, thereby driving the slide plate to move to both sides, opening the hook, releasing the limit on the locking plate, and allowing the retaining frame to move.

[0022] In summary, the present invention mainly has the following beneficial effects:

[0023] The present invention provides a transmission shaft, a retaining frame and a moving contact, so that when the relay is powered on, the moving contact can be rotationally connected to the transmission shaft. When two groups of static contacts are connected, the moving contact is tilted at an angle under the action of a torsion spring. In the subsequent connection process, one end of the moving contact is first connected to the first static contact, and then the second static contact is connected to the moving contact, thereby reducing the generation of arcs during connection and reducing the damage of the arcs to each group of contacts.

[0024] The present invention also provides a locking structure, which can limit the active moving contact through the locking mechanism when the relay is closed, so as to prevent the vibration generated during the operation of the vehicle from causing the moving contact to shake, causing false contact or damaging the torsion spring structure, thereby increasing the service life of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of a relay of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the relay of the present invention when it is closed;

[0028] Figure 4 It is a structural schematic diagram of the relay of the present invention when connected;

[0029] Figure 5 It is a structural schematic diagram of the movable contact of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the sealing box of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the arc extinguisher of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the adsorption iron sheet of the present invention;

[0033] Fig. 9 is a schematic structural diagram of a second embodiment of the present invention;

[0034] Fig.10 It is a structural schematic diagram of the installation position of the clamping plate of the second embodiment of the present invention;

[0035] Fig.11 It is a structural schematic diagram of a snap-fit ​​frame according to a second embodiment of the present invention;

[0036] Fig.12 It is a schematic diagram of the exploded structure of the clamping frame according to the second embodiment of the present invention.

[0037] In the figure: 1. relay housing; 101. hanging ear; 102. cover plate; 103. shielding cover; 2. first static contact; 3. second static contact; 4. sealing box; 5. coil; 6. moving iron core; 7. transmission shaft; 701. return spring; 702. rotating part; 703. torsion spring; 8. retaining frame; 801. snap plate; 9. moving contact; 10. fixed magnet; 11. mounting seat; 1101. adsorption iron sheet; 12. arc extinguisher; 1201. arc extinguishing grid; 13. snap frame; 1301. inclined plane; 1302. slide groove; 1303. guide plate; 1304. magnet; 1305. slide plate; 1306. hook; 1307. limit groove; 1308. spring. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] The following describes an embodiment of the present invention based on its overall structure.

[0040] A multi-stage separation new energy high voltage relay, such as Figures 1 to 8 As shown, it includes a relay housing 1, a first static contact 2 and a second static contact 3 are installed on the top of the relay housing 1, a sealing box 4 and a coil 5 are installed inside the relay housing 1, the coil 5 is located below the sealing box 4, the sealing box 4 is hollow, a moving iron core 6 is installed in the middle of the coil 5, a transmission shaft 7 is installed in the middle of the moving iron core 6, the top of the transmission shaft 7 extends to the inside of the sealing box 4 and is connected to a retaining frame 8, a moving contact 9 is installed on the top of the retaining frame 8, when in use, the transmission shaft 7 is pushed upward by the coil 5, thereby pushing the retaining frame 8 and the moving contact 9 to move upward.

[0041] See also Figures 2 to 4 As shown, a return spring 701 and a torsion spring 703 are installed at the connection position between the transmission shaft 7 and the retaining frame 8. The return spring 701 resets the retaining frame 8, and the torsion spring 703 drives the retaining frame 8 and the moving contact 9 to tilt at an angle, and the end of the moving contact 9 close to the first static contact 2 is tilted. After the moving contact 9 is fitted with the first static contact 2, it drives the retaining frame 8 to rotate around the transmission shaft 7. The return spring 701 is sleeved on the outer wall of the transmission shaft 7, and the bottom end of the return spring 701 is fixed to the inner wall of the sealing box 4. The top of the transmission shaft 7 is connected to a rotating part 702, and a rotating shaft is installed inside the rotating part 702. The retaining frame 8 is rotatably connected to the transmission shaft 7 through the rotating part 702, and the torsion spring 703 is sleeved on the outside of the rotating shaft of the rotating part 702, which can make the moving contact 9 contact with the first static contact 2 and the second static contact 3 in turn, thereby reducing the generation of arcs during the contact process and reducing damage to the relay.

[0042] See also Figures 2 to 7 , and the inner wall of the sealing box 4 is installed with an arc extinguisher 12, and the inner wall of the arc extinguisher 12 is provided with three groups of arc extinguishing grids 1201, and the widths of the three groups of arc extinguishing grids 1201 increase equidistantly from top to bottom, and the arc extinguishing grids 1201 are aligned with the bottom ends of the first static contact 2 and the second static contact 3. A locking mechanism is installed at the inner bottom end of the sealing box 4, and the locking mechanism includes a retaining frame 8 located below the second static contact 3, and a fixed magnet 10 is connected to the end thereof, and the inner wall of the sealing box 4 is located directly below the fixed magnet 10. A mounting base 11 is installed, and an adsorption iron sheet 1101 is connected to the top of the mounting base 11, and the fixed magnet 10 and the adsorption iron sheet 1101 are adsorbed to fix the moving contact 9. When the end of the moving contact 9 is in contact with the second static contact 3, the fixed magnet 10 is located on the side of the contacting position of the moving contact 9 and the second static contact 3, and is located between the moving contact 9 and the arc extinguisher 12. When the moving contact 9 is separated from the second static contact 3, the magnetic force of the fixed magnet 10 attracts the arc, causing the arc to enter the arc extinguisher 12.

[0043] See also Figure 1 and Figure 2 Both sides of the relay housing 1 are provided with hanging ears 101, a cover plate 102 is installed on the top of the relay housing 1, and the first static contact 2 and the second static contact 3 are both fixed inside the cover plate 102. A shielding cover 103 is arranged around the inner wall of the relay housing 1, which can facilitate the installation of the relay, and each group of contacts is limited by the cover plate 102.

[0044] See also Figures 9 to 12 , which is the second embodiment of the present application, and the difference from the first embodiment is that the structure of the locking mechanism is different. Specifically, the bottom end of the retaining frame 8 is connected to a snap plate 801, and a hook is provided at the bottom end of the snap plate 801. The inner wall of the sealing box 4 is located below the snap plate 801 and is provided with a snap frame 13. The snap frame 13 snaps the snap plate 801. The inside of the snap frame 13 is provided with an inclined surface 1301 and a slide groove 1302. The inclined surface 1301 is also provided with two groups, and the two groups of inclined surfaces 1301 are symmetrically arranged at the bottom end of the slide groove 1302. The inside of the slide groove 1302 is symmetrical. A guide plate 1303 is installed, and an inclined plate matching the inclined surface 1301 is provided at the bottom end of the guide plate 1303. A spring 1308 is installed between the two groups of guide plates 1303. A magnet 1304 is installed on the side of the guide plate 1303. A slide plate 1305 is sleeved on the top of each group of guide plates 1303. A limiting groove 1307 matching the slide plate 1305 is provided on the inner wall of the engaging frame 13. A hook 1306 is connected to the top of the slide plate 1305. The hook 1306 engages the engaging plate 801 to facilitate fixing the retaining frame 8 and the moving contact 9.

[0045] When in use, the relay needs to be installed on the vehicle first. When the relay is in use, the two sets of static contacts need to be connected. At this time, the coil 5 is started, and the coil 5 generates magnetic force. The magnetic force pushes the transmission shaft 7 to move, and the transmission shaft 7 drives the retaining frame 8 to move upward. The retaining frame 8 drives the moving contact 9 to move upward, and the moving contact 9 is tilted, and the position close to the first static contact 2 is upward, so that the moving contact 9 can first contact with the first static contact 2, so that the first static contact 2 and the moving contact 9 are first in contact, and the first static contact 2 is a non-electrical terminal, so as to avoid arcing when connected with the first static contact 2, and reduce the number of arcs. Then the magnetic force of the coil 5 continues to push the retaining frame 8 to move upward. At this time, the connection position of the moving contact 9 and the first static contact 2 stops moving upward, so as to drive the moving contact 9 to rotate around the rotating part 702 with the connection position with the first static contact 2 as the axis, so that the other end of the moving contact 9 is connected to the second static contact 3, and the relay connects the external power supply to make the external equipment run;

[0046] When the relay needs to be disconnected, the current of the closed coil 5 is released, and the return spring 701 drives the transmission shaft 7 to return. When returning, it drives the retaining frame 8 to move downward synchronously. At this time, under the action of the torsion spring 703, the retaining frame 8 will rotate, so that the retaining frame 8 rotates around the rotating part 702, so that one end of the moving contact 9 is always connected to the first static contact 2, and the moving contact 9 and the second static contact 3 begin to separate under the action of the torsion spring 703. At this time, a gap is generated between the moving contact 9 and the second static contact 3, and an arc is generated. The arc will spread outward, causing the arc to enter the arc extinguisher 12 and be extinguished by the arc extinguishing grid 1201. After the arc is extinguished, the torsion spring 703 rotates to the maximum angle. At this time, the moving contact 9 will not rotate, so that the moving contact 9 is also separated from the first static contact 2. At this time, no arc will be generated between the moving contact 9 and the first static contact 2, thereby reducing the generation of arcs when the relay is disconnected and improving the service life.

[0047] When the relay moves to the lowest end, the retaining frame 8 is limited by the locking structure to prevent the vibration generated during the operation of the vehicle from causing the torsion spring to shake, thereby maintaining the stability of the inside of the relay.

[0048] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A multi-stage separation new energy high-voltage relay, comprising a relay housing (1), wherein a first static contact (2) and a second static contact (3) are mounted on the top of the relay housing (1), characterized in that: A sealing box (4) and a coil (5) are installed inside the relay housing (1); the coil (5) is located below the sealing box (4); the sealing box (4) is hollow inside; a moving iron core (6) is installed in the middle of the coil (5); a transmission shaft (7) is installed in the middle of the moving iron core (6); the top end of the transmission shaft (7) extends to the inside of the sealing box (4) and is connected to a retaining frame (8); a moving contact (9) is installed at the top end of the retaining frame (8); and a contact (9) is installed at the connection position between the transmission shaft (7) and the retaining frame (8). A return spring (701) and a torsion spring (703) are provided. The return spring (701) resets the retaining frame (8). The torsion spring (703) drives the retaining frame (8) and the moving contact (9) to tilt at an angle, and the end of the moving contact (9) close to the first static contact (2) is tilted. After the moving contact (9) and the first static contact (2) are in contact, the retaining frame (8) is driven to rotate around the transmission shaft (7). An arc extinguisher (12) is installed on the inner wall of the sealing box (4), and a locking mechanism is installed on the inner bottom end of the sealing box (4).

2. A multi-stage separation new energy high-voltage relay according to claim 1, characterized in that: Both sides of the relay housing (1) are provided with hanging ears (101), a cover plate (102) is installed on the top of the relay housing (1), and the first static contact (2) and the second static contact (3) are both fixed inside the cover plate (102), and a shielding cover (103) is arranged around the inner wall of the relay housing (1).

3. A multi-stage separation new energy high-voltage relay according to claim 1, characterized in that: The return spring (701) is sleeved on the outer wall of the transmission shaft (7), and the bottom end of the return spring (701) is fixed to the inner wall of the sealing box (4); the top end of the transmission shaft (7) is connected to a rotating part (702), a rotating shaft is installed inside the rotating part (702), the retaining frame (8) is rotatably connected to the transmission shaft (7) through the rotating part (702), and the torsion spring (703) is sleeved on the outside of the rotating shaft of the rotating part (702).

4. A multi-stage separation new energy high-voltage relay according to claim 1, characterized in that: The inner wall of the arc extinguisher (12) is provided with three groups of arc extinguishing grids (1201), and the widths of the three groups of arc extinguishing grids (1201) increase equidistantly from top to bottom, and the arc extinguishing grids (1201) are aligned with the bottom ends of the first static contact (2) and the second static contact (3).

5. The multi-stage separation new energy high-voltage relay according to claim 1 is characterized in that: The retaining frame (8) is connected to a fixed magnet (10) at the end below the second static contact (3); a mounting seat (11) is installed on the inner wall of the sealing box (4) directly below the fixed magnet (10); an adsorption iron sheet (1101) is connected to the top of the mounting seat (11); and the fixed magnet (10) and the adsorption iron sheet (1101) are adsorbed to fix the moving contact (9).

6. A multi-stage separation new energy high-voltage relay according to claim 5, characterized in that: When the end of the moving contact (9) is in contact with the second stationary contact (3), the fixed magnet (10) is located on the side of the contact position between the moving contact (9) and the second stationary contact (3), and is located between the moving contact (9) and the arc extinguisher (12); when the moving contact (9) and the second stationary contact (3) are separated, the magnetic force of the fixed magnet (10) attracts the arc, causing the arc to enter the arc extinguisher (12).

7. The multi-stage separation new energy high-voltage relay according to claim 1 is characterized in that: The bottom end of the retaining frame (8) is connected to a snap-fit ​​plate (801), and a hook is provided at the bottom end of the snap-fit ​​plate (801). The inner wall of the sealing box (4) is provided with a snap-fit ​​frame (13) below the snap-fit ​​plate (801), and the snap-fit ​​frame (13) snaps into the snap-fit ​​plate (801).

8. A multi-stage separation new energy high-voltage relay according to claim 7, characterized in that: The interior of the locking frame (13) is provided with an inclined surface (1301) and a slide groove (1302). The inclined surface (1301) is also provided with two groups, and the two groups of inclined surfaces (1301) are symmetrically arranged at the bottom end of the slide groove (1302). A guide plate (1303) is symmetrically installed inside the slide groove (1302). The bottom end of the guide plate (1303) is provided with an inclined plate matching the inclined surface (1301). The two groups of guide plates (1303) are symmetrically arranged at the bottom end of the guide plate (1303). A spring (1308) is installed between the guide plates (1303), a magnet (1304) is installed on the side of the guide plates (1303), a slide plate (1305) is sleeved on the top of each group of guide plates (1303), a limiting groove (1307) matching the slide plate (1305) is opened on the inner wall of the locking frame (13), and a hook (1306) is connected to the top of the slide plate (1305), and the hook (1306) is used to lock the locking plate (801).

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