Moving contact push rod module and relay

Abstract

The utility model discloses a movable contact piece push rod module and a relay, the movable contact piece push rod module comprises a push rod, a movable contact piece, a first spring and a second spring, one end of the push rod passes through the movable contact piece, the other end of the push rod can be movably connected with a movable iron core of the relay, and the first spring is sleeved outside the push rod and can provide elastic supporting force for the movable contact piece; one end of the second spring is sleeved outside one end of the push rod, and the other end of the second spring can elastically abut against the inner wall of the ceramic cover of the relay so as to provide elastic reset force opposite to the elastic supporting force to the push rod and the movable contact piece. The moving contact push rod module is novel, simple and reasonable in structure and convenient to assemble, the size of a relay product can be effectively reduced, the processing difficulty and the processing cost of the relay product are reduced, and the assembling flexibility of the relay product is promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a moving contact pusher module and a relay made by applying the same. Background Art

[0002] At present, the relay products on the market generally adopt a direct-acting structure of the moving contact. It includes a ceramic cover, two static contacts fixedly inserted on the ceramic cover, a moving contact disposed inside the ceramic cover and vertically opposite to the two static contacts, a pusher assembly connected to the moving contact, and a magnetic circuit device capable of driving the pusher assembly and the moving contact to move towards or away from the static contacts together. Among them, the connection method between the pusher assembly and the magnetic circuit device is generally designed as follows: the pusher assembly includes a vertical pusher and a return spring sleeved on the lower part of the pusher. The upper part of the pusher is connected to the moving contact. The magnetic circuit device includes a coil winding, and a static iron core and a moving iron core disposed vertically opposite in the space surrounded by the coil winding. The static iron core is provided with a through hole for the pusher to freely pass through and a groove A for receiving the upper end of the return spring. The moving iron core is provided with a slot A for the lower end of the pusher to be inserted and a groove B for receiving the lower end of the return spring. Moreover, after the lower end of the pusher is inserted into the slot A, the pusher and the moving iron core need to be welded or riveted and fixed.

[0003] However, the above "connection method between the pusher assembly and the magnetic circuit device" has the following deficiencies in current applications: ① Since the two ends of the return spring are respectively received in the moving and static iron cores, this causes the moving and static iron cores to be grooved, which not only increases the complexity of product processing, increases the processing cost, but also results in larger sizes of the moving and static iron cores, thus being unfavorable for the miniaturization development of relay products. ② Since the two ends of the return spring are respectively received in the moving and static iron cores, it is required that the relative position between the moving iron core and the pusher must be fixed to prevent the return spring from failing to drive the pusher to reset normally, which also makes the connection relationship between the moving iron core and the pusher more complex and the processing cost higher. In view of this, the present utility model is specifically proposed. Summary of the Invention

[0004] In order to overcome the above defects, the utility model provides a moving contact pusher module and a relay. The structure of the moving contact pusher module is novel, simple, reasonable, and convenient to assemble, and can effectively reduce the size of the relay product, reduce the processing difficulty and processing cost of the relay product, and promote the assembly flexibility of the relay product.

[0005] The technical solution adopted by the present utility model to solve its technical problems is as follows: A moving contact pusher module is used to be installed on a relay, and includes a pusher, a moving contact, a first spring, and a second spring. One end of the pusher passes through the moving contact, and the other end can be movably connected to the moving iron core of the relay. The first spring is sleeved outside the pusher and can provide an elastic supporting force to the moving contact. One end of the second spring is sleeved outside one end of the pusher, and the other end can be elastically abutted against the inner wall of the ceramic cover of the relay to provide an elastic restoring force to the pusher and the moving contact in a direction opposite to the direction of the elastic supporting force.

[0006] As a further improvement of the present utility model, the other end of the pusher can be movably inserted and matched with the moving iron core.

[0007] As a further improvement of the present utility model, the pusher is provided with a pusher body in a round rod shape. One end of the pusher body passes through the moving contact and is riveted and fixed to the moving contact at the same time. The outer diameter of the other end of the pusher body is smaller than the outer diameter of the rest of the pusher body for being movably inserted and matched with the moving iron core.

[0008] As a further improvement of the present utility model, two limiting washers are also provided. While the two limiting washers are sleeved on the pusher body at intervals along the axial direction of the pusher body, they are respectively located on the opposite sides beside the moving contact.

[0009] Both ends of the first spring are elastically abutted against the moving contact and one of the limiting washers respectively, and one end of the second spring is elastically abutted against the other limiting washer.

[0010] As a further improvement of the present utility model, a stop ring is integrally protruded on the outer wall of the pusher body, and the stop ring can resist and limit one of the limiting washers corresponding to the first spring.

[0011] As a further improvement of the present utility model, the moving contact is provided with a strip-shaped main body portion, a through hole centered on the main body portion for one end of the pusher to pass through, and an embedding groove recessed on one side surface of the main body portion and capable of accommodating one end of the first spring. The embedding groove and the through hole are arranged on the same center line.

[0012] The present utility model also provides a relay, which includes a ceramic cover, a magnetic conductive plate hermetically connected to the opening side of the ceramic cover, a magnetic circuit device arranged beside the side of the magnetic conductive plate facing away from the ceramic cover, a static contact fixedly inserted into the ceramic cover, and a moving contact push rod module as described in the present utility model. One end of the push rod, the moving contact, the first spring, and the second spring in the moving contact push rod module are all disposed inside the ceramic cover, and the other end of the push rod movably passes through the magnetic conductive plate. The moving contact and the static contact are arranged opposite to each other, and the other end of the second spring elastically abuts against the inner wall of the ceramic cover;

[0013] The magnetic circuit device is provided with a coil winding and a moving iron core movably arranged in the space surrounded by the coil winding and simultaneously movably inserted and matched with the other end of the push rod. When the coil winding is energized, the moving iron core can drive the push rod and the moving contact to move towards the static contact until the moving contact and the static contact are attracted and connected. At this time, the second spring is in a compressed state; when the coil winding is de-energized, under the action of the elastic restoring force of the second spring and the self-gravity of the push rod and the moving iron core, the push rod and the moving contact move away from the static contact until the moving contact and the static contact are separated.

[0014] As a further improvement of the present utility model, a static iron core is further arranged in the space surrounded by the coil winding. The static iron core is arranged opposite to the moving iron core and is also fixedly connected to the magnetic conductive plate. In addition, a through hole A for the push rod to movably pass through is provided in the center of the static iron core;

[0015] A slot for movably inserting and matching with the other end of the push rod is recessed at one end of the moving iron core facing the static iron core.

[0016] As a further improvement of the present utility model, an air charging and exhausting port for resistance welding processing is provided on the magnetic conductive plate.

[0017] The beneficial effects of the present utility model are as follows: Compared with the prior art, the structure of the moving contact push rod module of the present utility model is novel, simple, and reasonable. In particular, the second spring is arranged between one end of the push rod and the inner wall of the ceramic cover, so that while ensuring sufficient elastic restoring force is provided to the push rod and the moving contact, it also has the advantages of convenient assembly, reduced size of the relay product, reduced processing difficulty and processing cost of the relay product, and improved assembly flexibility of the relay product. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the moving contact push rod module of the present utility model from the first perspective;

[0019] Figure 2This is a schematic structural view of the moving contact pusher module of the present utility model from the second perspective;

[0020] Figure 3 This is a schematic structural view of the moving contact of the present utility model from the first perspective;

[0021] Figure 4 This is a schematic structural view of the moving contact of the present utility model from the second perspective;

[0022] Figure 5 This is a schematic cross-sectional view of the relay of the present utility model equipped with the moving contact pusher module;

[0023] Figure 6 This is one of the assembly structural views (from the first perspective) when the moving contact pusher module, the magnetic conductive plate and the magnetic circuit device of the present utility model are partially assembled together;

[0024] Figure 7 This is the second of the assembly structural views (from the second perspective) when the moving contact pusher module, the magnetic conductive plate and the magnetic circuit device of the present utility model are partially assembled together.

[0025] The following explanations are made in conjunction with the accompanying drawings:

[0026] 1. Moving contact pusher module; 10. Pusher; 100. Pusher main body; 101. Stop ring; 11. Moving contact; 110. Main body part; 111. Perforation; 112. Embedded groove; 12. First spring; 13. Second spring; 14. Limit gasket; 2. Ceramic cover; 3. Magnetic conductive plate; 30. Charge and exhaust port; 4. Magnetic circuit device; 40. Coil winding; 41. Moving iron core; 42. Static iron core; 43. Iron core housing; 5. Static contact. Specific embodiments

[0027] The following is a detailed description of the preferred embodiments of the present utility model in conjunction with the accompanying drawings.

[0028] Embodiment 1:

[0029] Please refer to the attached Figure 1 to the attached Figure 4As shown, Embodiment 1 of the present invention provides a moving contact pusher module 1 for installation on a relay, which includes a pusher 10, a moving contact 11, a first spring 12, and a second spring 13. One end of the pusher 10 passes through the moving contact 11, and the other end of the pusher 10 can be movably connected to the moving iron core of the relay. The first spring 12 is sleeved outside the pusher 10 and can provide an elastic supporting force to the moving contact 11. One end of the second spring 13 is sleeved outside one end of the pusher 10, and the other end of the second spring 13 can elastically abut against the inner wall of the ceramic cover of the relay, so as to provide an elastic restoring force to the pusher 10 and the moving contact 11 in a direction opposite to the direction of the elastic supporting force. It can be understood that after the moving contact pusher module 1 is installed on the relay, its working principle is as follows: when the relay is powered on, the moving iron core in the relay can drive the pusher 10 and the moving contact 11 to move towards the static contact together until the moving contact 11 is attracted and connected to the static contact, and at this time the second spring 13 is compressed; when the relay is powered off / loses power, under the action of the elastic restoring force of the second spring 13 and the self-gravity of the pusher 10 and the moving iron core, the pusher 10 and the moving contact 11 can move away from the static contact together until the moving contact 11 is separated from the static contact and disconnected.

[0030] Compared with the prior art, the structure of the moving contact pusher module described in Embodiment 1 of the present invention is novel, simple, and reasonable. In particular, the second spring 13 is arranged between one end of the pusher 10 and the inner wall of the ceramic cover, which not only ensures sufficient elastic restoring force for the pusher 10 and the moving contact 11, but also has the following advantages: convenient assembly (because the space in the ceramic cover is relatively large, which is convenient for the installation of components such as the second spring 13); reduction of the size of the relay product (because the reset spring is not installed in the moving iron core and the static iron core, the sizes of the moving and static iron cores are reduced, and thus the overall size of the relay product is reduced, which is beneficial to the miniaturization development of the relay product); reduction of the processing difficulty and cost of the relay product (because the reset spring is not installed in the moving iron core and the static iron core, the operation of grooving on the moving and static iron cores is omitted); promotion of the assembly flexibility of the relay product (because the reset spring is not installed in the moving iron core, the limitation of the connection method between the moving iron core and the pusher 10 is reduced, and the connection between the moving iron core and the pusher 10 is made simpler and more flexible).

[0031] The following will describe in detail the specific structure of the moving contact pusher module described in Embodiment 1 of the present invention.

[0032] First, regarding the pusher 10.

[0033] Please continue to refer to the attached Figure 1 and 2As shown, the structure of the push rod 10 preferably adopted in the first embodiment is as follows: the push rod 10 is provided with a push rod main body 100 in a round rod shape. One end of the push rod main body 100 passes through the moving contact piece 11 and is riveted and fixed to the moving contact piece 11 at the same time. The outer diameter of the other end of the push rod main body 100 is smaller than the outer diameter of the rest of the push rod main body 100 for movably connecting with the moving iron core of the relay. Further, the other end of the push rod main body 100 is preferably movably inserted and matched with the moving iron core (that is, the other end of the push rod 10 is movably inserted and matched with the moving iron core). This movable insertion method is not only easy to process and realize, only need to process a slot on the moving iron core with an inner diameter not less than the outer diameter of the other end of the push rod main body 100, but also convenient for assembly; thus facilitating production implementation.

[0034] Next, regarding the moving contact piece 11.

[0035] Please continue to refer to the attached Figure 1 to the attached Figure 4 As shown, the structure of the moving contact piece 11 preferably adopted in the first embodiment is as follows: the moving contact piece 11 is provided with a long strip-shaped main body portion 110, a through hole 111 formed in the middle of the main body portion 110 for one end of the push rod 10 (specifically, one end of the push rod main body 100) to pass through, and a groove 112 recessed on one side of the main body portion 110 and capable of receiving one end of the first spring 12. And the groove 112 and the through hole 111 are arranged on the same center line.

[0036] Note: After the moving contact push rod module 1 is installed on the relay, the groove 112 is formed on the side of the main body portion 110 facing away from the static contact.

[0037] Then, regarding the installation methods of the first spring 12 and the second spring 13.

[0038] Based on the preferred implementation structures of the push rod 10 and the moving contact piece 11, the installation methods preferably adopted for the first spring 12 and the second spring 13 in the first embodiment are as follows: Please continue to refer to the attached Figure 1 and the attached Figure 2 As shown, the moving contact push rod module 1 is further provided with two limiting gaskets 14. The two limiting gaskets 14 are sleeved on the push rod main body 100 at intervals along the axial direction of the push rod main body 100, and at the same time, the two limiting gaskets 14 are respectively located on the opposite sides of the moving contact piece 11; the two ends of the first spring 12 are respectively elastically abutted against the moving contact piece 11 (specifically, the groove 112) and one of the limiting gaskets 14, and one end of the second spring 13 is elastically abutted against the other limiting gasket 14.

[0039] As can be seen from the above, the moving contact piece 11 can support, resist and limit a limiting gasket 14 corresponding to the second spring 13. In order to support, resist and limit a limiting gasket 14 corresponding to the first spring 12, the following design is also made in Embodiment 1: Please continue to refer to the attached Figure 1 and the attached Figure 2 As shown, a stop ring 101 is integrally protruded on the outer wall of the push rod body 100. The stop ring 101 can support, resist and limit a limiting gasket 14 corresponding to the first spring 12.

[0040] Embodiment 2:

[0041] Please refer to the attached Figure 5 to the attached Figure 7 As shown, Embodiment 2 provides a relay (such as a high-voltage DC relay), which includes a ceramic cover 2, a magnetic conductive plate 3 hermetically connected to the opening side of the ceramic cover 2, a magnetic circuit device 4 arranged beside the side of the magnetic conductive plate 3 facing away from the ceramic cover 2, a static contact 5 fixedly inserted into the ceramic cover 2, and a moving contact piece push rod module. Among them, the moving contact piece push rod module adopts the structure of the moving contact piece push rod module provided in the above Embodiment 1, that is: one end of the push rod 10, the moving contact piece 11, the first spring 12 and the second spring 13 in the moving contact piece push rod module are respectively built into the ceramic cover 2, and the other end of the push rod 10 also movably passes through the magnetic conductive plate 3. The moving contact piece 11 and the static contact 5 are arranged opposite to each other. The other end of the second spring 13 elastically abuts against the inner wall of the ceramic cover 2; the magnetic circuit device 4 is provided with a coil winding 40 and a moving iron core 41 movably arranged in the space surrounded by the coil winding 40 and simultaneously movably inserted and matched with the other end of the push rod 10. When the coil winding 40 is energized, the moving iron core 41 can drive the push rod 10 and the moving contact piece 11 to move towards the static contact 5 until the moving contact piece 11 is attracted and connected to the static contact 5. At this time, the second spring 13 is in a compressed state; when the coil winding 40 is de-energized, under the action of the elastic restoring force of the second spring 13 and the self-gravity of the push rod 10 and the moving iron core 41, the push rod 10 and the moving contact piece 11 can move away from the static contact 5 until the moving contact piece 11 is separated from the static contact 5.

[0042] Furthermore, please continue to refer to the attached Figure 5As shown, the magnetic circuit device 4 is further provided with a static iron core 42 and an iron core housing 43. Among them, the iron core housing 43 is placed inside the space surrounded by the coil winding 40 and is fixedly connected to the magnetic conduction plate 3 at the same time. The moving iron core 41 is freely placed inside the iron core housing 43. The static iron core 42 is also placed inside the iron core housing 43 and is fixedly connected to the magnetic conduction plate 3 at the same time. There is also a spacing that satisfies the movement of the moving iron core 41 between the static iron core 42 and the moving iron core 41 (it can be understood that the static iron core 42 and the moving iron core 41 are arranged at intervals and oppositely). In addition, to cooperate with the installation of the push rod 10, a through hole A for the push rod 10 to pass through movably is provided in the middle of the static iron core 42. A slot that is movably inserted and matched with the other end of the push rod 10 is recessed at one end of the moving iron core 41 facing the static iron core 42.

[0043] Further, please continue to refer to the attached Figure 6 and the attached Figure 7 As shown, in this Embodiment 2, an air charging and exhausting port 30 for resistance welding processing is further provided on the magnetic conduction plate 3. It can be understood that in the assembly of the relay product in this Embodiment 2, a resistance welding processing technology is adopted. Compared with the conventional brazing technology, the resistance welding processing has low requirements for the equipment environment, low required power, short processing time, and does not need to configure a brazing exhaust pipe, iron core, etc., reducing the processing cost.

[0044] Furthermore, in this Embodiment 2, the air charging and exhausting port 30 adopts a stepped hole structure, which can reduce the stress generated on the relay product during resistance welding processing, thus better ensuring the processing quality of the relay product.

[0045] As can be seen from the above, the relay provided by this Embodiment 2 has the advantages of novel, simple, reasonable structure, small volume, easy processing and assembly, low processing cost, and good processing quality.

[0046] In the above description, many specific details are elaborated to fully understand the present invention. However, the above description is only the preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. All those that do not depart from the content of the technical solution of the present invention and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A movable contact push rod module for installation in a relay, characterized in that: The invention comprises a push rod (10), a movable contact piece (11), a first spring (12) and a second spring (13); one end of the push rod (10) passes through the movable contact piece (11), and the other end can be movably connected to the movable iron core of the relay; the first spring (12) is sleeved outside the push rod (10) and can provide an elastic supporting force to the movable contact piece (11); one end of the second spring (13) is sleeved outside one end of the push rod (10), and the other end can elastically abut against the inner wall of the ceramic cover of the relay, so as to provide an elastic reset force to the push rod (10) and the movable contact piece (11) in a direction opposite to the direction of the elastic supporting force.

2. The movable contact piece push rod module according to claim 1, characterized in that: The other end of the push rod (10) can be movably plugged into and matched with the moving iron core.

3. The movable contact piece push rod module according to claim 1, characterized in that: The push rod (10) is provided with a round rod-shaped push rod body (100), one end of which passes through the movable contact piece (11) and is riveted and fixed to the movable contact piece (11), and the outer diameter of the other end of the push rod body (100) is smaller than the outer diameter of the rest of the push rod body (100) so as to be movably plugged in with the movable iron core.

4. The movable contact piece push rod module according to claim 3, characterized in that: Two limiting washers (14) are also provided. The two limiting washers (14) are sleeved on the push rod body (100) at intervals along the axial direction of the push rod body (100) and are respectively located on two opposite sides of the movable contact piece (11); The two ends of the first spring (12) are elastically in contact with the movable contact piece (11) and one of the limiting gaskets (14), respectively, and one end of the second spring (13) is elastically in contact with the other of the limiting gaskets (14).

5. The movable contact piece push rod module according to claim 4, characterized in that: A stop ring (101) is also integrally provided on the outer wall of the push rod body (100), and the stop ring (101) can resist and limit a limit washer (14) corresponding to the first spring (12).

6. The movable contact piece push rod module according to claim 1, characterized in that: The movable contact piece (11) is provided with a main body (110) in the form of a long sheet, a through hole (111) centrally arranged on the main body (110) and through which one end of the push rod (10) passes, and an embedding groove (112) recessed on a side surface of the main body (110) and capable of accommodating one end of the first spring (12), wherein the embedding groove (112) and the through hole (111) are arranged on the same center line.

7. A relay, characterized in that: It comprises a ceramic cover (2), a magnetic conductive plate (3) sealed and connected to the opening side of the ceramic cover (2), a magnetic circuit device (4) arranged beside the side of the magnetic conductive plate (3) facing away from the ceramic cover (2), a stationary contact (5) fixedly inserted in the ceramic cover (2), and a movable contact piece push rod module as claimed in any one of claims 1 to 6, wherein one end of the push rod (10), the movable contact piece (11), the first spring (12) and the second spring (13) in the movable contact piece push rod module are all built into the ceramic cover (2), and the other end of the push rod (10) moves through the magnetic conductive plate (3), the movable contact piece (11) and the stationary contact (5) are arranged opposite to each other, and the other end of the second spring (13) elastically abuts against the inner wall of the ceramic cover (2); The magnetic circuit device (4) is provided with a coil winding (40) and a moving iron core (41) movably arranged in a space surrounded by the coil winding (40) and movably plugged with the other end of the push rod (10); when the coil winding (40) is energized, the moving iron core (41) can drive the push rod (10) and the moving contact piece (11) to move toward the stationary contact (5) until the moving contact piece (11) is attracted and connected with the stationary contact (5), at which time the second spring (13) is in a compressed state; When the coil winding (40) is powered off, the elastic restoring force of the second spring (13) and the gravity of the push rod (10) and the moving iron core (41) cause the push rod (10) and the moving contact piece (11) to move away from the stationary contact (5) until the moving contact piece (11) is separated from the stationary contact (5).

8. The relay according to claim 7, characterized in that: A static iron core (42) is also arranged in the space surrounded by the coil winding (40), the static iron core (42) is arranged opposite to the moving iron core (41) and is also fixedly connected to the magnetic conductive plate (3), and a through hole A is provided in the center of the static iron core (42) for the push rod (10) to movably penetrate; One end of the moving iron core (41) facing the stationary iron core (42) is recessed with a slot for movably plugging with the other end of the push rod (10).

9. The relay according to claim 7, characterized in that: The magnetic conductive plate (3) is provided with an air filling and exhaust port (30) for resistance welding processing.

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