A moving component of a high voltage DC relay and an assembly method thereof

Abstract

The present invention discloses a moving assembly of a high-voltage DC relay and an assembly method thereof, wherein the moving assembly comprises a push rod, a moving iron core and a stopper; the push rod is fitted in the through hole of the moving iron core; the bottom of the moving iron core is provided with a first groove with an opening facing downward, and the side wall of the first groove is inclined; the bottom section of the push rod corresponds to the first groove of the moving iron core, and the stopper is formed by injection molding in the area surrounded by the first groove of the moving iron core and the bottom section of the push rod and realizes the fixation of the push rod and the moving iron core. The present invention can effectively solve the problem of thread eccentricity by using a smooth rod for positioning and canceling the threaded connection, and improve the problem that the rotation of the iron core in the X / Y direction cannot be effectively restricted due to the gap between the tooth top and the tooth bottom between the internal and external threads; by using a stopper for stopping and canceling the glue dispensing, it can not only avoid the defects of the glue dispensing bringing organic matter, cracking and generating foreign matter, but also reduce the time required for the glue dispensing curing, thereby improving the production speed.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to a moving component of a high-voltage direct current relay and an assembling method thereof. Background Art

[0002] The high-voltage DC relay of the prior art usually adopts a moving spring direct-acting type (also called solenoid direct-acting type) structure. The contact part of this high-voltage DC relay includes two static contacts (i.e., load lead-out terminals) and a moving assembly. The moving assembly includes a moving spring part, a push rod assembly, and a moving iron core. The moving spring part is bridge-type fitted between the two static contacts and installed on the top of the push rod assembly. Through the reciprocating motion of the push rod assembly, the two moving contacts of the moving spring part are respectively in contact with or separated from the two static contacts. When in contact, the current flows into one of the static contacts and flows out from the other static contact after passing through the moving spring part. The push rod assembly usually includes a spring seat and a push rod. The spring seat is fixed at the top of the push rod. Through the cooperation of the spring seat and the U-shaped basket, the moving spring can be installed on the top of the push rod assembly. The lower part of the push rod is fixed with the moving iron core. Through the cooperation of the moving iron core and the magnetic circuit part, the moving iron core drives the push rod to move back and forth. Since the moving iron core needs to move synchronously with the push rod, it is necessary to fix the moving iron core at the lower part of the push rod. In the prior art, the external thread of the push rod and the internal thread of the moving iron core are usually used to limit the movement and rotation of the moving iron core relative to the push rod in the horizontal X / Y direction, and the bottom of the moving iron core and the push rod are fixed with glue to limit the movement and rotation of the moving iron core relative to the push rod in the Z direction.

[0003] The threaded connection method of the prior art cannot effectively limit the rotation of the moving iron core in the X / Y direction due to the gap between the top and bottom of the inner and outer threads, resulting in eccentricity and skewness of the axis, which makes the product movement process more seriously interfered, affecting the electrical parameters of the product such as attraction and rebound. At the same time, the contact surface and the moving and static iron cores are not parallel when closed, which reduces the stability of the holding force and causes the product's anti-short circuit performance to have a scattered difference. The use of glue fixation to limit the movement and rotation of the moving iron core in the Z direction has the following disadvantages: First, due to the long-term movement of the product, closed contact, and long-term high temperature operation, there is a risk of cracking the glue and generating foreign matter, which will seriously cause fatal defects such as non-conduction of the product; second, the volatilization of organic matter affects the atmosphere of the sealed cavity and causes a decrease in arc extinguishing ability; third, the production cycle is long and the beat is slow. The current production temperature is 110℃, and the oven baking and cooling are more than 40mins, and the equipment occupies a large area and investment; fourth, it is more difficult to control the amount of liquid. A large amount of glue is easy to overflow, and a small amount of glue is unreliable and easy to generate bubbles. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a moving component of a high-voltage DC relay and an assembly method thereof. By using a light rod for positioning and eliminating the threaded connection, the problem of thread eccentricity can be effectively solved, and the problem of the inability to effectively limit the rotation of the iron core in the X / Y direction due to the gap between the tooth top and the tooth bottom between the internal and external threads can be improved; by using a stopper to stop and eliminating the glue, not only can the defects of organic matter and foreign matter caused by cracking of the glue be avoided, but also the time required for the glue curing can be reduced, thereby improving the production speed.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a moving component of a high-voltage DC relay, including a push rod, a moving iron core and a stopper made of plastic material; a first step facing downward is provided at the upper position of the lower section of the push rod, and the first step of the push rod abuts against the top of the moving iron core; the moving iron core is provided with a through hole that penetrates from top to bottom, and the middle part of the lower section of the push rod is matched in the through hole of the moving iron core; a first groove with an opening facing downward is provided at a position corresponding to the through hole at the bottom of the moving iron core, and the side wall of the first groove is inclined, gradually inclining outward from the bottom of the groove to the opening direction; the bottom section of the push rod corresponds to the first groove of the moving iron core, the stopper is formed by injection molding in the area surrounded by the first groove of the moving iron core and the bottom section of the push rod and realizes the fixation of the push rod and the moving iron core, and the top end of the stopper abuts against the bottom of the first groove to limit the downward movement of the moving iron core relative to the push rod.

[0006] A convex ring surrounding the circumference of the push rod is also provided in the bottom section of the push rod.

[0007] The convex ring of the push rod is one or a plurality of convex rings which are spaced apart from each other.

[0008] An annular groove surrounding the circumference of the push rod is also provided in the bottom section of the push rod.

[0009] The push rod has one annular groove or a plurality of annular grooves spaced apart from each other.

[0010] A second groove with an upward opening is provided at a position corresponding to the through hole on the upper part of the moving iron core; and the first step of the push rod abuts against the bottom of the second groove of the moving iron core.

[0011] A method for assembling a moving component of a high-voltage DC relay comprises the following steps:

[0012] A spring seat is formed on the top of the push rod by injection molding;

[0013] The push rod with the spring seat passes through the yoke iron plate, the static iron core, the return spring and the moving iron core from top to bottom in sequence, and the spring seat is located on the yoke iron plate, and the static iron core is fitted in the yoke iron plate;

[0014] The downward step of the push rod is pressed against the bottom of the upper groove of the moving iron core, and the return spring is elastically tensioned between the stationary iron core and the moving iron core, so that the bottom section of the push rod corresponds to the lower groove of the moving iron core;

[0015] A stop piece is formed by injection molding the area enclosed by the bottom section of the push rod and the lower groove of the moving iron core. The stop piece is fixed between the push rod and the moving iron core by injection molding, and the top of the stop piece abuts against the bottom of the lower groove to limit the downward movement of the moving iron core relative to the push rod.

[0016] Furthermore, the groove wall of the lower groove of the moving iron core is made into a slope shape, and the slope is gradually inclined outward from the groove bottom of the lower groove to the opening direction of the lower groove, so that the side wall of the stopper has a corresponding slope shape.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention adopts the middle part of the lower section of the push rod to fit in the through hole of the moving iron core, and the stopper made of plastic material is made in the lower groove of the moving iron core by an integrated molding method as a stopper to limit the downward movement of the moving iron core relative to the push rod. This structure of the present invention can effectively solve the problem of thread eccentricity by using the light rod for positioning and eliminating the threaded connection, and improve the problem that the rotation of the iron core in the X / Y direction cannot be effectively limited due to the gap between the top and bottom of the inner and outer threads; by using the stopper made of plastic material to stop and eliminate the glue, it can not only avoid the defects of organic matter and foreign matter caused by the glue, but also reduce the time required for the glue to solidify, thereby improving the production speed.

[0019] 2. The present invention adopts the method of making the groove wall of the lower groove of the moving iron core into an inclined surface shape, and the inclined surface is gradually inclined outward from the groove bottom of the lower groove to the opening direction of the lower groove, so that the side wall of the stopper has a corresponding inclined surface shape. This structure of the present invention can decompose the longitudinal force carried in the Z direction through the inclined surface shape of the side wall of the stopper and the inclined surface shape of the groove wall of the lower groove of the moving iron core.

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the moving component of a high-voltage DC relay and the assembly method thereof of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of the moving assembly of the high-voltage DC relay and the relay-related components in accordance with an embodiment of the present invention;

[0022] Figure 2It is a front view of the moving assembly of the high-voltage DC relay and the relay-related components in cooperation with each other in an embodiment of the present invention;

[0023] Figure 3 It is a bottom view of the moving assembly of the high-voltage DC relay and the relay-related components in cooperation with each other in an embodiment of the present invention;

[0024] Figure 4 It is a side view of the moving assembly of the high-voltage DC relay and the relay-related components in cooperation with each other in an embodiment of the present invention;

[0025] Figure 5 is along Figure 2 Sectional view along line AA;

[0026] Figure 6 It is an exploded schematic diagram of the main view direction of the cooperation between the moving assembly of the high-voltage DC relay and the relay-related components of the embodiment of the present invention;

[0027] Figure 7 is along Figure 6 Sectional view along the midline BB;

[0028] Figure 8 yes Figure 7 The enlarged schematic diagram of the C part in FIG.

[0029] Fig. 9 yes Figure 7 An enlarged schematic diagram of part D in FIG. DETAILED DESCRIPTION

[0030] Example

[0031] See also Figures 1 to 9As shown, a moving assembly of a high-voltage DC relay of the present invention includes a push rod 1, a moving iron core 2 and a stopper 3 made of plastic material; the relay-related component matched with the present invention is a yoke iron plate 41, and the moving assembly also includes a spring seat 42, a static iron core 43 and a reset spring 44, the spring seat 42 is fixed to the top of the push rod 1 by injection molding, the spring seat 42 is located on the yoke iron plate 41, the spring seat 42 is usually also connected to a fixing plate 45, the static iron core 43 is fixed to the bottom of the yoke iron plate 41, the push rod 1 passes through the yoke iron plate 41 and the static iron core 43 from the top of the yoke iron plate 41, and is connected to the moving iron core 2 below the static iron core 43, and the reset spring 44 is arranged between the static iron core 43 and the moving iron core 2; a first step 11 facing downward is provided at the upper position of the lower section of the push rod 1, and the first step 11 of the push rod 1 is against the top of the moving iron core 2, and the first step 11 of the push rod 1 is used to The limiting effect of step 11 limits the upward movement of the moving iron core 2 relative to the push rod 1; the moving iron core 2 is provided with a through hole 21 which penetrates from top to bottom, and the middle part of the lower section of the push rod 1 is fitted in the through hole 21 of the moving iron core 2; the bottom of the moving iron core 2 is provided with a first groove 22 with an opening facing downward, and the side wall 221 of the first groove 22 is inclined, gradually inclining outward from the groove bottom 222 to the opening direction; the bottom section of the push rod 1 corresponds to the first groove 22 of the moving iron core 2, and the stop member 3 is formed by injection molding in the area surrounded by the first groove 22 of the moving iron core 2 and the bottom section 12 of the push rod 1 to fix the push rod 1 and the moving iron core 2, and the top end of the stop member 3 is against the groove bottom 222 of the first groove 22 to limit the downward movement of the moving iron core 2 relative to the push rod 1.

[0032] In this embodiment, a convex ring 13 surrounding the circumference of the push rod is further provided in the bottom section 12 of the push rod 1 .

[0033] In this embodiment, the number of the protruding rings 11 of the push rod 1 is two and they are spaced apart from each other.

[0034] Of course, an annular groove surrounding the circumference of the push rod may be provided in the bottom section of the push rod, and the annular groove of the push rod may be one or a plurality of annular grooves spaced apart from each other.

[0035] In this embodiment, a second groove 23 with an upward opening is provided at a position corresponding to the through hole on the upper portion of the moving iron core 2 ; the first step 11 of the push rod 1 abuts against the groove bottom 231 of the second groove 23 of the moving iron core.

[0036] A method for assembling a moving component of a high-voltage DC relay of the present invention comprises the following steps:

[0037] A spring seat 42 is formed on the top of the push rod 1 by injection molding;

[0038] The push rod 1 with the spring seat 42 passes through the yoke iron plate 41, the static iron core 43, the return spring 44 and the moving iron core 2 from top to bottom in sequence, and the spring seat 42 is located on the yoke iron plate 41, and the static iron core 43 is adapted in the yoke iron plate 41;

[0039] The downward step 11 of the push rod 1 is pressed against the groove bottom 231 of the upper groove (i.e., the second groove) 23 of the moving iron core 2, and the return spring 44 is elastically tensioned between the stationary iron core 43 and the moving iron core 2, so that the bottom section 12 of the push rod 1 corresponds to the lower groove (i.e., the first groove) 22 of the moving iron core 2;

[0040] A stop member 3 is formed by injection molding the area enclosed by the bottom section 12 of the push rod 1 and the lower groove 22 of the moving iron core 2. The stop member 3 is fixed between the push rod 1 and the moving iron core 2 by injection molding. The top end of the stop member 3 abuts against the bottom 222 of the lower groove 22 to limit the downward movement of the moving iron core 2 relative to the push rod 1.

[0041] Furthermore, the groove wall (i.e., side wall) 221 of the lower groove 22 of the moving iron core 2 is made into a slope shape, and the slope is gradually inclined outward from the groove bottom 222 of the lower groove 22 to the opening direction of the lower groove, so that the side wall of the stop member 3 has a corresponding slope shape.

[0042] The present invention discloses a moving assembly of a high-voltage DC relay and an assembly method thereof, wherein the middle part of the lower section of the push rod 1 is matched with the bare rod in the through hole 21 of the moving iron core 2, and the stopper 3 made of plastic material is made in the lower groove 22 of the moving iron core by an integrated molding method as a stopper component for limiting the downward movement of the moving iron core 2 relative to the push rod 1. This structure of the present invention can effectively solve the problem of thread eccentricity by eliminating the threaded connection by using the bare rod for positioning, and improve the problem that the rotation of the iron core in the X / Y direction cannot be effectively limited due to the gap between the tooth top and the tooth bottom between the internal and external threads; by using the stopper made of plastic material for positioning and eliminating the glue point, it can not only avoid the defects of organic matter and foreign matter caused by the glue point, but also reduce the time required for the glue point to solidify, thereby improving the production speed.

[0043] A moving assembly of a high-voltage DC relay and an assembly method thereof of the present invention adopts the method of manufacturing the groove wall 221 of the lower groove 22 of the moving iron core 2 into an inclined surface shape, and the inclined surface is gradually inclined outward from the groove bottom 222 of the lower groove 22 to the opening direction of the lower groove, so that the side wall of the stopper 3 is in a corresponding inclined surface shape. This structure of the present invention can decompose the longitudinal force carried in the Z direction by matching the inclined surface shape of the side wall of the stopper with the inclined surface shape of the groove wall of the lower groove of the moving iron core.

[0044] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A moving assembly of a high-voltage DC relay, comprising a push rod, a moving iron core and a stopper made of plastic material; a first step facing downward is provided at the upper position of the lower section of the push rod, and the first step of the push rod abuts against the upper surface of the moving iron core; the moving iron core is provided with a through hole penetrating from top to bottom; characterized in that: The middle part of the lower section of the push rod is fitted in the through hole of the moving iron core; a first groove with an opening facing downward is provided at the position corresponding to the through hole at the bottom of the moving iron core, and the side wall of the first groove is inclined, gradually inclining outward from the bottom of the groove to the opening direction; the bottom section of the push rod corresponds to the first groove of the moving iron core, and the stop member is formed by injection molding in the area surrounded by the first groove of the moving iron core and the bottom section of the push rod to fix the push rod and the moving iron core, and the top end of the stop member abuts against the bottom of the first groove to limit the downward movement of the moving iron core relative to the push rod; a second groove with an opening facing upward is provided at the upper part of the moving iron core corresponding to the through hole; the first step of the push rod abuts against the bottom of the second groove of the moving iron core.

2. The moving assembly of the high voltage DC relay according to claim 1, characterized in that: A convex ring surrounding the circumference of the push rod is also provided in the bottom section of the push rod.

3. The moving assembly of the high voltage DC relay according to claim 2, characterized in that: The convex ring of the push rod is one or a plurality of convex rings which are arranged at intervals from each other.

4. The moving assembly of the high voltage DC relay according to claim 1, characterized in that: An annular groove surrounding the circumference of the push rod is also provided in the bottom section of the push rod.

5. The moving assembly of the high voltage DC relay according to claim 4, characterized in that: The push rod has one annular groove or a plurality of annular grooves spaced apart from each other.

6. A method for assembling a moving assembly of a high voltage DC relay according to any one of claims 1 to 5, characterized in that: The steps include: A spring seat is formed on the top of the push rod by injection molding; The push rod with the spring seat passes through the yoke iron plate, the static iron core, the return spring and the moving iron core from top to bottom in sequence, and the spring seat is located on the yoke iron plate, and the static iron core is fitted in the yoke iron plate; The downward step of the push rod is pressed against the bottom of the upper groove of the moving iron core, and the return spring is elastically tensioned between the stationary iron core and the moving iron core, so that the bottom section of the push rod corresponds to the lower groove of the moving iron core; A stop piece is formed by injection molding the area enclosed by the bottom section of the push rod and the lower groove of the moving iron core. The stop piece is fixed between the push rod and the moving iron core by injection molding, and the top of the stop piece abuts against the bottom of the lower groove to limit the downward movement of the moving iron core relative to the push rod.

7. The method for assembling a moving component of a high-voltage DC relay according to claim 6, characterized in that: Furthermore, the groove wall of the lower groove of the moving iron core is made into a slope shape, and the slope is gradually inclined outward from the groove bottom of the lower groove to the opening direction of the lower groove, so that the side wall of the stopper has a corresponding slope shape.

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