A push rod combination structure of a high-voltage DC relay and a high-voltage DC relay

Abstract

The present invention discloses a push rod assembly structure for a high-voltage DC relay and a high-voltage DC relay. The push rod assembly structure includes a push rod, a movable contact piece, and a contact spring mounted on the push rod. A first limiting portion integrally connected to the upper end of the push rod is provided. The push rod is also provided with a second limiting portion located below the first limiting portion. The movable contact piece and the contact spring are limited between the first limiting portion and the second limiting portion, and the contact spring is located below the movable contact piece. The present invention eliminates the need for a retaining ring or nut to limit the upper end of the push rod, thereby avoiding the problem of retaining ring breakage, simplifies the assembly process of the push rod portion, and improves assembly efficiency. During assembly, the first limiting portion can be used as a tooling fixing point to facilitate screwing of the movable iron core at the lower end of the push rod, making assembly more reasonable.

Description

Technical Field

[0001] The present invention relates to the field of relays, in particular to a push rod assembly structure of a high-voltage direct current relay and the high-voltage direct current relay. Background Art

[0002] A relay is an electronic control device with 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. It is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic regulation, safety protection, and circuit conversion.

[0003] A high-voltage DC relay is a type of relay. The push rod portion of a high-voltage DC relay generally includes a push rod, a moving contact piece mounted on the push rod, and a contact spring. In order to limit the moving contact piece and the contact spring, the upper end of the push rod is generally limited by a retaining spring. However, when a retaining spring is used for limiting, there is a risk of the retaining spring breaking during the movement of the push rod. If a nut is used for limiting, when further glue is applied for fixing, the amount of glue will be difficult to control because there is no space to accommodate the glue. At the same time, when the lower end of the push rod is also threadedly connected to the moving iron core, the threads at the upper and lower ends are prone to loosening, and there are no tooling fixing points, resulting in low assembly efficiency. Summary of the Invention

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a push rod assembly structure of a high-voltage DC relay and a high-voltage DC relay, which can solve the problems existing in the use of retaining springs or nuts for limiting.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a push rod combination structure of a high-voltage DC relay, including a push rod, and a movable contact piece and a contact spring sleeved on the push rod, a first limiting portion integrally connected to the upper end of the push rod is provided, and the push rod is also provided with a second limiting portion located below the first limiting portion, the movable contact piece and the contact spring are restricted between the first limiting portion and the second limiting portion, and the contact spring is located below the movable contact piece.

[0006] Furthermore, the movable contact piece, the contact spring, and the second limiting portion are sequentially sleeved on the push rod from the lower end of the push rod, and are in contact with each other.

[0007] Furthermore, the second limiting portion includes a spring seat and a shaft sleeve sleeved outside the push rod, the upper end of the spring seat abuts against the lower end of the contact spring, the lower end of the spring seat abuts against or is integrally connected to the upper end of the shaft sleeve, and the lower end of the shaft sleeve abuts against the moving iron core connected to the lower end of the push rod.

[0008] Furthermore, the lower end of the push rod is threadedly connected to the moving iron core and fixed by glue; the push rod is provided with a downward step surface at the position of the spring seat, and the upper end of the spring seat abuts against the step surface.

[0009] Furthermore, the first limiting portion is a flange portion protruding laterally from the upper end of the push rod.

[0010] Furthermore, the movable contact piece has a toggle member for triggering a micro switch of a high-voltage DC relay; the toggle member is fixed on an isolating member, which is fixedly connected to the movable contact piece and separates the toggle member from the movable contact piece.

[0011] Furthermore, the first limiting portion is a toggle member for triggering a micro switch of a high-voltage DC relay, and the toggle member and the push rod are formed into an integrated structure by insert injection molding.

[0012] Furthermore, an isolation piece is sleeved on the push rod, and the isolation piece is located between the toggle block and the movable contact piece to separate the toggle block and the movable contact piece.

[0013] The present invention further provides a high-voltage DC relay, comprising a coil assembly, a moving iron core and a reaction spring, and also comprising a push rod combination structure of the high-voltage DC relay as described above in the present invention, wherein the lower end of the push rod is connected to the moving iron core, and the reaction spring is sleeved on the push rod and located between the moving iron core and a third limiting portion located above the moving iron core.

[0014] Furthermore, the third limiting portion is a magnetic conductive plate, and the push rod passes through the magnetic conductive plate; the magnetic conductive plate is provided with a clearance groove for avoiding the coil lead-out pins of the coil assembly, and the magnetic conductive plate is provided with chamfers at both ends of the clearance groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Since the upper end of the push rod is provided with a first limiting portion integrally connected thereto, and the push rod is further provided with a second limiting portion located below the first limiting portion, the movable contact piece and the contact spring are restricted between the first limiting portion and the second limiting portion, so that the upper end of the push rod is free from the need to use a retaining spring or a nut for limiting, thereby avoiding the problem of retaining spring breakage, and simplifying the assembly process of the push rod part (no need to install a retaining spring or tighten a nut or apply glue), thereby improving assembly efficiency, and during assembly, the first limiting portion can be used as a tooling fixing point to facilitate tightening of the movable iron core at the lower end of the push rod, making assembly more reasonable.

[0017] 2. The movable contact piece, contact spring, and second limiting part are sequentially mounted on the push rod from the lower end thereof, and are in contact with each other in pairs, which not only simplifies the assembly process but also makes the second limiting part a non-circlip structure, thereby avoiding the risk of breakage of the retaining spring caused by the retaining spring being used to limit the middle portion of the push rod.

[0018] 3. The second limiting portion includes the spring seat and the shaft sleeve, which further simplifies the assembly process. The push rod does not need to be provided with a complex limiting structure, making the push rod easier to process.

[0019] 4. The setting of the step surface makes the position of the spring seat fixed, the working stability of the entire push rod assembly structure is good, and the magnetic gap between the moving iron core and the magnetic conductive plate is guaranteed.

[0020] 5. The provision of the isolation member can prevent the toggle member from directly contacting the movable contact piece, thereby preventing the heat on the movable contact piece from being transferred to the toggle member and affecting the performance of the toggle member.

[0021] 6. The third limiting portion is a magnetic conductive plate, which can prevent the reaction spring from directly contacting the guide plate and rubbing out plastic chips.

[0022] 7. The chamfered corners on the magnetic conductive plate can increase the distance between the magnetic conductive plate and the enameled wire on the coil assembly, thereby increasing the creepage distance and enhancing the withstand voltage.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the push rod assembly structure of a high-voltage DC relay and the high-voltage DC relay of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an exploded schematic diagram of the push rod assembly structure of the present invention in Example 1 (including the magnetic conductive plate, guide plate, etc.);

[0025] Figure 2 is a cross-sectional view of a high-voltage DC relay according to the first embodiment of the present invention;

[0026] Figure 3 This is an exploded schematic diagram of the push rod assembly structure of the second embodiment of the present invention (including the magnetic conductive plate, guide plate, etc.);

[0027] Figure 4 This is a schematic diagram of a three-dimensional structure in which the toggle member, the isolating member, and the movable contact piece are fixed together according to the second embodiment of the present invention;

[0028] Figure 5 2 is a cross-sectional view of a high-voltage DC relay according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0029] Example 1

[0030] See Figure 1 、 Figure 2 As shown, a push rod assembly structure of a high-voltage DC relay of the present invention includes a push rod 1, and a movable contact piece 2 and a contact spring 3 sleeved on the push rod 1. A first limiting portion integrally connected to the upper end of the push rod 1 is provided, and the push rod 1 is further provided with a second limiting portion located below the first limiting portion. The movable contact piece 2 and the contact spring 3 are restricted between the first limiting portion and the second limiting portion, and the contact spring 3 is located below the movable contact piece 2.

[0031] In this embodiment, the movable contact piece 2, contact spring 3, and second limiting portion are sequentially mounted on the push rod 1 from the lower end thereof, and are in contact with each other. Specifically, the second limiting portion includes a spring seat 4 and a shaft sleeve 5, both of which are mounted on the outside of the push rod 1. The upper end of the spring seat 4 abuts against the lower end of the contact spring 3, the lower end of the spring seat 4 abuts against the upper end of the shaft sleeve 5, and the lower end of the shaft sleeve 5 abuts against the movable iron core 6 connected to the lower end of the push rod 1. The lower end of the push rod 1 is provided with threads for threaded connection with the movable iron core 6 and is fixed with glue. In other embodiments, the lower end of the spring seat is integrally connected to the upper end of the shaft sleeve, that is, the spring seat and the shaft sleeve are a single piece manufactured as one piece.

[0032] In this embodiment, the push rod 1 is provided with a downward-facing stepped surface 11 at the location of the spring seat 4, with the upper end of the spring seat 4 abutting against this stepped surface 11. This stabilizes the position of the spring seat 4, and provides excellent operational stability for the entire push rod 1 assembly. The push rod 1 comprises a coarse-diameter section and a fine-diameter section arranged vertically. The transition region between the coarse-diameter and fine-diameter sections forms the stepped surface 11. The spring seat 4 and the shaft sleeve 5 are respectively fitted onto the fine-diameter section of the push rod 1. The lower portion of the fine-diameter section is provided with threads that connect to the movable iron core 6.

[0033] In this embodiment, the first limiting portion is a toggle member 7 for triggering the micro switch 30 of the high-voltage DC relay. The toggle member 7 and the push rod 1 are formed into an integrated structure by insert injection molding. The push rod 1 is also provided with an isolating member, which is located between the toggle block and the moving contact piece 2 to separate the toggle block from the moving contact piece 2. The isolating member is specifically a metal gasket 8, but is not limited thereto. In other embodiments, the isolating member is an insulating member made of ceramic or other materials. In this way, contact between the toggle member 7 and the moving contact piece 2 can be avoided, thereby preventing the heat on the moving contact piece 2 from being transferred to the toggle member 7 and affecting the performance of the toggle member 7.

[0034] In this embodiment, the movable contact piece 2 is U-shaped. When the high-voltage DC relay adopts a three-magnet structure, the U-shaped cavity of the movable contact piece 2 can be used to make room for a middle magnet.

[0035] The present invention provides a push rod assembly structure for a high-voltage DC relay, in which the upper end of the push rod 1 directly uses a toggle member 7 integrally connected thereto to limit the moving contact piece 2 and the contact spring 3, so that the upper end of the push rod 1 is free from the need to use a retaining ring or a nut for limiting the position, thereby avoiding the problem of retaining ring breakage, and simplifying the assembly process of the push rod 1 part (no need to install a retaining ring or tighten a nut or apply glue), thereby improving assembly efficiency, and during assembly, the toggle member 7 can be used as a tool fixing point to facilitate tightening of the moving iron core 6 at the lower end of the push rod 1, making assembly more reasonable.

[0036] See Figure 1 、 Figure 2 As shown, a high-voltage DC relay of the present invention includes a coil assembly 40, a moving iron core 6 and a reaction spring 9, and also includes a push rod combination structure of the high-voltage DC relay as described in the present invention above, wherein the lower end of the push rod 1 is connected to the moving iron core 6, and the reaction spring 9 is sleeved on the push rod 1 and is located between the moving iron core 6 and the third limiting portion located above the moving iron core 6.

[0037] In this embodiment, the third limiting portion is a magnetic plate 10, and the push rod 1 passes through the magnetic plate 10; a guide plate 20 is provided above the magnetic plate 10, and the push rod 1 passes through the guide plate 20, and the guide plate 20 guides the push rod 1. Therefore, the reaction spring 9 is in contact between the magnetic plate 10 and the moving iron core 6, which can prevent the reaction spring 9 from directly contacting the guide plate 20 and rubbing out plastic shavings. The magnetic plate 10 is provided with a clearance groove 101 for avoiding the coil lead pins of the coil assembly 40, and the magnetic plate 10 is provided with chamfers 102 at both ends of the clearance groove 101. In this way, the distance between it and the enameled wire on the coil assembly 40 can be increased, thereby increasing the creepage distance and enhancing the withstand voltage value.

[0038] When assembling the push rod portion of a high-voltage DC relay of the present invention, the metal gasket 8, movable contact piece 2, contact spring 3, spring seat 4, and shaft sleeve 5 are first sequentially installed on the push rod 1 from the lower end of the push rod 1. The push rod 1 is then passed through the guide plate 20 and the magnetic plate 10 in sequence, and then the reaction spring 9 is installed. Finally, the lower end of the push rod 1 is threadedly connected to the movable iron core 6 and fixed with glue. Therefore, the present invention greatly simplifies the assembly process of the push rod portion, and the upper, middle, and lower parts of the push rod 1 do not need to be limited by retaining springs, avoiding the risk of retaining springs breaking during the movement of the push rod 1.

[0039] Example 2

[0040] See Figure 3-Figure 5 As shown, a push rod assembly structure of a high-voltage DC relay of the present invention is different from the above-mentioned embodiment 1 in that the first limiting portion is a laterally protruding flange portion 12 provided on the upper end of the push rod 1.

[0041] In this embodiment, the moving contact piece 2 is provided with a toggle member 7 for triggering the micro switch 30 of the high-voltage DC relay. Specifically, the toggle member 7 is fixed on an isolating member, which is fixedly connected to the moving contact piece 2 and separates the toggle member 7 from the moving contact piece 2. The isolating member is specifically a metal member 71, which is convenient for processing and fixing with the moving contact piece 2 and the toggle member 7. In other embodiments, the isolating member is an insulating member made of ceramic or other materials. The toggle member 7 and the metal member 71 can be fixed by insert injection molding, or by snap-fitting or locking with a locking member. The metal member 71 and the moving contact piece 2 are specifically fixed by riveting, but are not limited thereto. In other embodiments, the metal member and the moving contact piece are fixed by welding or locking with a locking member. The locking member is, for example, a screw or a bolt and nut assembly. The toggle member 7 is fixed to the metal member 71 and then fixedly connected to the movable contact piece 2. This prevents direct contact between the toggle member 7 and the movable contact piece 2, thereby preventing heat from the movable contact piece 2 from being transferred to the toggle member 7 and affecting its performance. Furthermore, it ensures that the toggle member 7 and the movable contact piece 2 operate synchronously, achieving consistent synchronization. The toggle member 7, the isolating member (i.e., the metal member 71), and the movable contact piece 2 are fixed together, simplifying the assembly process with the push rod 1, reducing the original assembly of three parts with the push rod 1 to a single part.

[0042] The present invention provides a push rod assembly structure for a high-voltage DC relay, in which the upper end of the push rod 1 directly uses a flange portion 12 integrally connected thereto to limit the moving contact piece 2 and the contact spring 3, so that the upper end of the push rod 1 is free from the need to use a retaining ring or a nut for limiting, thereby avoiding the problem of retaining ring breakage, and simplifying the assembly process of the push rod 1 part (no need to install a retaining ring or tighten a nut or apply glue), thereby improving assembly efficiency. During assembly, the flange portion 12 can be used as a tool fixing point to facilitate tightening of the moving iron core 6 at the lower end of the push rod 1, making assembly more reasonable.

[0043] See Figure 3-Figure 5 As shown, a high-voltage DC relay of the present invention includes a coil assembly 40, a moving iron core 6 and a reaction spring 9, and also includes a push rod 1 combination structure of the high-voltage DC relay as described in the above-mentioned present invention, wherein the lower end of the push rod 1 is connected to the moving iron core 6, and the reaction spring 9 is sleeved on the push rod 1 and is located between the moving iron core 6 and the third limiting portion located above the moving iron core 6.

[0044] In this embodiment, the third limiting portion is a magnetic plate 10, and the push rod 1 passes through the magnetic plate 10; a guide plate 20 is provided above the magnetic plate 10, and the push rod 1 passes through the guide plate 20. Therefore, the reaction spring 9 is in contact between the magnetic plate 10 and the moving iron core 6, which can prevent the reaction spring 9 from directly contacting the guide plate 20 and rubbing out plastic shavings. The magnetic plate 10 is provided with a clearance groove 101 for avoiding the coil lead pins of the coil assembly 40, and the magnetic plate 10 is provided with chamfers 102 at both ends of the clearance groove 101. In this way, the distance between it and the enameled wire on the coil assembly 40 can be increased, thereby increasing the creepage distance and enhancing the withstand voltage value.

[0045] When assembling the push rod portion of a high-voltage DC relay according to the present invention, the movable contact piece 2, contact spring 3, spring seat 4, and sleeve 5 are first sequentially installed onto the push rod 1 from the lower end of the push rod 1. The push rod 1 is then passed through the guide plate 20 and the magnetic plate 10 in sequence, and the reaction spring 9 is then installed. Finally, the lower end of the push rod 1 is threadedly connected to the moving iron core 6 and fixed with glue. Therefore, the present invention greatly simplifies the assembly process of the push rod portion, and no retaining springs are required to limit the upper, middle, and lower parts of the push rod 1, thereby avoiding the risk of retaining springs breaking during the movement of the push rod 1.

[0046] The push rod assembly structure of a high-voltage DC relay and the high-voltage DC relay of the present invention, the unrelated parts are the same as those in the prior art or can be implemented by using the prior art.

[0047] The above embodiments are only used to further illustrate a push rod assembly structure of a high-voltage DC relay and a high-voltage DC relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the technical solution of the present invention.

Claims

1. A push rod assembly structure for a high-voltage DC relay, comprising a push rod, a movable contact piece and a contact spring sleeved on the push rod, characterized in that: A first limiting portion integrally connected to the upper end of the push rod is provided, and the push rod is also provided with a second limiting portion located below the first limiting portion. The moving contact piece and the contact spring are restricted between the first limiting portion and the second limiting portion, and the contact spring is located below the moving contact piece; the moving contact piece is provided with a toggle member for triggering a micro switch of a high-voltage DC relay; the toggle member is fixed on an isolating member, which is fixedly connected to the moving contact piece and separates the toggle member and the moving contact piece.

2. The push rod assembly structure of the high-voltage DC relay according to claim 1, characterized in that: The movable contact piece, the contact spring and the second limiting portion are sequentially sleeved on the push rod from the lower end of the push rod and are in contact with each other.

3. The push rod assembly structure of the high-voltage DC relay according to claim 2, characterized in that: The second limiting portion includes a spring seat and a shaft sleeve sleeved outside the push rod, the upper end of the spring seat abuts against the lower end of the contact spring, the lower end of the spring seat abuts against or is integrally connected to the upper end of the shaft sleeve, and the lower end of the shaft sleeve abuts against the moving iron core connected to the lower end of the push rod.

4. The push rod assembly structure of the high-voltage DC relay according to claim 3, characterized in that: The lower end of the push rod is threadedly connected to the moving iron core and fixed by glue.

5. The push rod assembly structure of the high-voltage DC relay according to claim 3, characterized in that: The push rod is provided with a downward step surface at the position of the spring seat, and the upper end of the spring seat abuts against the step surface.

6. The push rod assembly structure of the high-voltage DC relay according to claim 1, characterized in that: The first limiting portion is a laterally protruding flange portion provided on the upper end of the push rod.

7. The push rod assembly structure of the high-voltage DC relay according to claim 1, characterized in that: The first limiting portion is a toggle member for triggering a micro switch of a high-voltage DC relay, and the toggle member and the push rod are formed into an integrated structure through insert injection molding.

8. The push rod assembly structure of the high-voltage DC relay according to claim 7, characterized in that: An isolation piece is sleeved on the push rod and is located between the toggle piece and the movable contact piece to separate the toggle piece from the movable contact piece.

9. A high-voltage DC relay comprising a coil assembly, a moving iron core, and a reaction spring, characterized in that: It also includes a push rod assembly structure of a high-voltage DC relay as described in any one of claims 1-8, wherein the lower end of the push rod is connected to the moving iron core, and the reaction spring is sleeved on the push rod and is located between the moving iron core and the third limiting portion located above the moving iron core.

10. The high-voltage DC relay according to claim 9, characterized in that: The third limiting portion is a magnetic conductive plate, and the push rod passes through the magnetic conductive plate; the magnetic conductive plate is provided with a clearance groove for avoiding the coil lead-out pins of the coil assembly, and the magnetic conductive plate is provided with chamfers at both ends of the clearance groove.

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