A counter-force spring, armature spring assembly and relay

Abstract

The application discloses a counter-force spring leaf, an armature spring leaf assembly and a relay. The counter-force spring leaf comprises a spring leaf body; one end of the spring leaf body is matched with a tail part of an armature; a middle part of the spring leaf body is provided with an upward bending part; the other end of the spring leaf body is matched with a transmission rod; and a connecting part for fixing the armature is arranged in the spring leaf body. The structure of the application simplifies the part machining process, reduces the machining difficulty of the spring leaf body, improves the size precision of the part and makes the part size consistency better.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to a reaction spring, an armature spring assembly, and a relay. Background Technology

[0002] High-voltage vacuum relays are the most common type of high-voltage relay. They are characterized by ceramic brazing sealing, which seals the relay contacts in a vacuum (with a small portion filled with SF6 gas), allowing the relay to achieve extremely high dielectric withstand voltage (typically from 3.5kV to 70kV) in a very small size. One existing high-voltage vacuum relay uses a folded reaction spring with a clearance fit between the tail and the armature, and a slotted clamping mechanism for the head and armature. A mating hole mates with the drive rod, utilizing a C-bend to provide reaction force to the drive rod. This reaction spring has the following drawbacks: 1. The clearance fit between the reaction spring and the armature tail makes the armature tail prone to warping, resulting in poor engagement; 2. The armature head is clamped in a spring slot, with no limit on the tail, leading to significant back-and-forth movement, lack of precise positioning, and poor component dimensional consistency; 3. The excessive curvature of the reaction spring makes parts difficult to machine and complicates ensuring precision after forming. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reaction spring, an armature spring assembly and a relay. By improving the structure of the reaction spring, the processing difficulty of the reaction spring is reduced, the dimensional accuracy of the parts is improved and the dimensional consistency of the components is better.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a reaction spring, including a spring body; characterized in that: one end of the spring body cooperates with the tail of the armature; the middle part of the spring body is provided with an upward bending part, and the other end of the spring body cooperates with a transmission rod; the spring body is provided with a connecting part for fixing with the armature.

[0005] Furthermore, in the reed body, one end of the reed body and the connecting part are provided with an upwardly protruding U-shaped bend to increase the flexibility of the reed body and to use the U-shaped bend to adjust the gap between the armature and the iron core.

[0006] Furthermore, one end of the reed body is provided with side wings on both sides of the width, and the two side wings are bent downward to form a groove with the slot facing downward at one end of the reed body for cooperating with the tail of the armature; the bent part causes the other end of the reed body to tilt towards one end of the reed body, and the other end of the reed body is bent into a horizontal shape and provided with a through hole for cooperating with the transmission rod.

[0007] Furthermore, in the reed body, a connecting part for fixing to the armature is provided between the groove and the bent part; a U-shaped bend is provided protruding upward between the groove and the connecting part.

[0008] Furthermore, in the reed body, a downwardly protruding bud is provided on the top wall of the groove, so that the bud always abuts against the armature when the armature is in motion.

[0009] Furthermore, the reed body has a central hollow section at the U-shaped bend, so that the U-shaped bend forms two side-by-side structures.

[0010] Furthermore, in the reed body, a widening portion extending to both sides of the width is provided between the U-shaped bend and the bending portion, and the connecting portion is provided in the widening portion.

[0011] Furthermore, the connecting part is a through hole.

[0012] Furthermore, in the reed body, the end of the side wing is bent into a horizontal shape and extends obliquely to the other end of the reed body.

[0013] An armature spring assembly includes an armature; characterized in that it further includes a reaction spring as described above, wherein the armature is fixedly connected to the reaction spring.

[0014] Furthermore, the armature also has a widening portion at the position corresponding to the widening portion of the reaction spring. In the widening portion of the armature, a protrusion is provided at the position corresponding to the through hole. The protrusion of the armature is adapted to the through hole of the reaction spring and the reaction spring and the armature are fixed together by riveting.

[0015] A relay characterized in that it includes a reaction spring as described in any one of the above-mentioned methods.

[0016] A relay characterized in that it includes an armature reed assembly as described in any one of the above descriptions.

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

[0018] 1. The invention employs a design where one end of the reaction spring body mates with the tail of the armature; the middle of the spring body has an upwardly bent portion; the other end of the spring body mates with the transmission rod; and the spring body includes a connecting portion for fixing to the armature. This structure simplifies the part manufacturing process, reduces the processing difficulty of the spring body, improves part dimensional accuracy, and enhances component dimensional consistency.

[0019] 2. Due to the use of the aforementioned reed body, a U-shaped bend protrudes upward between one end of the reed body and the connecting part to increase the flexibility of the reed body and to adjust the gap between the armature and the iron core using the U-shaped bend. This structure of the present invention increases the flexibility of the reaction spring, adjusts the gap between the armature and the iron core using the angle of the root of the U-shaped bend, and simultaneously adjusts the magnitude of the reaction force using this angle; the smaller the angle, the greater the reaction force. The reaction force can also be adjusted by adjusting the width of the U-shaped bend; the wider the bend, the greater the reaction force.

[0020] 3. Because the spring body incorporates a downwardly protruding bud on the top wall of the groove, this bud always abuts against the armature during armature operation. This structure of the present invention, through the cooperation of the bud and the armature, ensures that the tail of the armature is in contact with the magnetic cylinder in any state, preventing poor engagement.

[0021] 4. Because the reaction spring is used, a central hollow section is provided at the U-shaped bend, so that the U-shaped bend forms two side by side structures. With this structure of the present invention, the reaction force can be adjusted by adjusting the width of the U-shaped bend through the central hollow section.

[0022] 5. Because the armature incorporates a widened portion corresponding to the widened portion of the reaction spring, and a protrusion corresponding to the through hole in the widened portion of the armature, the protrusion fits into the through hole of the reaction spring, and the reaction spring and armature are fixed together by riveting. This structure of the present invention, through a more reliable riveting fixation method between the reaction spring and the armature, prevents the armature from shifting within the reaction spring. Furthermore, during the riveting process, the spring can be shaped by top-down tapping combined with tooling, thus providing a self-correcting effect on the included angle at the root of the U-shaped bend of the spring.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the reaction spring, armature spring assembly and relay of the present invention are not limited to the embodiments. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the reaction spring according to an embodiment of the present invention;

[0025] Figure 2 This is a front view of the reaction spring according to an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional schematic diagram of the reaction spring according to an embodiment of the present invention;

[0027] Figure 4 This is a three-dimensional structural schematic diagram of the armature spring assembly according to an embodiment of the present invention;

[0028] Figure 5 This is a front view of the armature spring assembly according to an embodiment of the present invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the armature spring assembly and magnetic circuit part in an embodiment of the present invention.

[0030] Figure 7 This is a front view of the armature spring assembly and magnetic circuit portion in an embodiment of the present invention.

[0031] Figure 8 This is a three-dimensional structural diagram of a relay according to an embodiment of the present invention;

[0032] Figure 9 This is a front view of a relay according to an embodiment of the present invention;

[0033] Figure 10 This is a top view of a relay according to an embodiment of the present invention;

[0034] Figure 11 This is a bottom view of a relay according to an embodiment of the present invention;

[0035] Figure 12 yes Figure 9 A cross-sectional view of point AA (armature closed state);

[0036] Figure 13 yes Figure 10 A cross-sectional view of BB (armature closed state);

[0037] Figure 14 yes Figure 9 A cross-sectional view of point AA (armature disconnected);

[0038] Figure 15 yes Figure 10 A cross-sectional view of BB (armature disconnected). Detailed Implementation

[0039] Example

[0040] See Figures 1 to 15 As shown, a reaction spring of the present invention includes a spring body 1; one end of the spring body 1 (i.e., the left end of the spring body in the figure) is engaged with the tail of the armature 2; the middle part of the spring body 1 is provided with an upward bending part 13, and the other end of the spring body 1 (i.e., the right end of the spring body in the figure) is engaged with a transmission rod 70; the spring body 1 is provided with a connecting part for fixing with the armature 2.

[0041] In this embodiment, a U-shaped bend 16 is provided protruding upward between one end of the reed body 1 and the connecting part to increase the flexibility of the reed body 1 and to adjust the gap between the armature 2 and the iron core 3 by using the U-shaped bend 16.

[0042] In this embodiment, one end of the reed body 1 is provided with side wings 11 on both sides of the width. The two side wings 11 are bent downward to form a groove 12 with the slot facing downward at one end of the reed body 1 so as to cooperate with the tail of the armature 2. The bending part 13 causes the other end of the reed body 1 to tilt towards one end of the reed body 1. The other end of the reed body 1 is bent into a horizontal shape and provided with a through hole 14 so as to cooperate with the transmission rod 70.

[0043] In this embodiment, the reed body 1 has a connecting part for fixing to the armature 2 between the groove 12 and the bending part 13; and a U-shaped bend 16 protrudes upward between the groove 12 and the connecting part.

[0044] In this embodiment, the reed body 1 has a downwardly protruding bulge 121 on the top wall of the groove 12, so that the bulge 121 always abuts against the armature 2 when the armature 2 is in motion.

[0045] In this embodiment, the reed body 1 is provided with a middle hollow part 17 at the U-shaped bend 16 so that the U-shaped bend 16 is formed into two side by side structures.

[0046] In this embodiment, the reed body 1 is provided with a widening portion 18 extending to both sides of the width between the U-shaped bend 16 and the bending portion 13, and the connecting portion is provided in the widening portion 18.

[0047] In this embodiment, the connecting part is a through hole 15.

[0048] In this embodiment, the end of the side wing 11 in the reed body 1 is bent into a horizontal shape 19 and extends obliquely to the other end of the reed body 1. The reed body 1 is welded and fixed to the magnetic cylinder 4 by bending the end of the side wing 11 into a horizontal shape 19, and the welding method is such as laser welding.

[0049] An armature spring assembly of the present invention includes an armature 2; and also includes the reaction spring 1 described in the above embodiments, wherein the armature 2 is fixedly connected to the reaction spring 1.

[0050] In this embodiment, the armature 2 is also provided with a widening portion 21 at the position corresponding to the widening portion 18 of the reaction spring 1. In the widening portion 21 of the armature 2, a protrusion 211 is provided at the position corresponding to the through hole 15. The protrusion 211 of the armature 2 is adapted to the through hole 15 of the reaction spring 1 and the reaction spring 1 and the armature 2 are fixed together by riveting.

[0051] In this embodiment, the end of the side wing 11 of the reaction spring 1 is also bent into a horizontal shape 19 and extends obliquely to the other end of the reaction spring 1.

[0052] A relay of the present invention includes a reaction spring 1 as described in the above embodiments.

[0053] A relay of the present invention includes an armature reed assembly 10 as described in the above embodiments.

[0054] In this embodiment, the relay is a diaphragm-type high-voltage vacuum relay, which also includes a coil assembly 20, a frame 30, a contact portion 40, a housing 50, and a ceramic cover 60. The tail of the armature spring assembly 10 cooperates with the coil assembly 20. The armature spring assembly 10 and the coil assembly 10 are installed in the housing 50. The contact portion 40 is installed in the ceramic cover 60. The frame 30 is fixed between the ceramic cover 60 and the housing 50. The contact portion 40 is connected to the reaction spring 1 through a transmission rod 70.

[0055] In this embodiment, the frame 30 includes an upper connecting part 301 at the top for connecting to the bottom of the ceramic cover 60, a lower connecting part 302 at the bottom for connecting to the top of the outer shell 50, and an intermediate piece 303 connecting the upper connecting part and the lower connecting part; the intermediate piece 303 is connected at a large oblique angle between the upper connecting part 301 and the lower connecting part 302.

[0056] In this embodiment, the coil assembly 40 includes an iron core 3, a self-adhesive enameled wire 4, coil leads 5, and a magnetic cylinder 6. The iron core 3 includes a winding post and a base. The self-adhesive enameled wire 4 is wound around the winding post, and its two ends are respectively connected to two coil leads 3. The magnetic cylinder 6 is fitted over the iron core 1 on which the self-adhesive enameled wire 4 is wound, and is formed into a single unit by internal glue filling. The top of the magnetic cylinder has an opening 61, which exposes the iron core 3 to contact the armature 2, and the opening 61 allows the internal glue filling to form a single unit.

[0057] In this embodiment, as Figure 12 As shown, when the coil is energized, the iron core 3 attracts the armature spring assembly 10 to move downwards, and the transmission rod 70 tilts to the left to contact the first stationary contact piece 401, as... Figure 13 When the coil is de-energized, the armature spring assembly 10 moves upward away from the iron core 3 under the reaction force of the reaction spring 1, and the transmission rod 70 tilts to the right and contacts the second static contact piece 402.

[0058] This invention discloses a reaction spring, an armature spring assembly, and a relay. The spring body 1 has side wings 11 extending to both sides of its width at one end. These side wings 11 are bent downwards, forming a downward-facing groove 12 at one end of the spring body 1 to engage with the tail of the armature 2. The spring body 1 has an upward-bent portion 13 in its middle, causing the other end of the spring body to tilt towards one end of the spring body 1. This other end of the spring body 1 is bent horizontally and has a through hole 14 to engage with a transmission rod 70. A connecting portion for fixing the armature 2 is provided between the groove 12 and the bent portion 13 in the spring body 1. This structure simplifies the parts processing, reduces the difficulty of processing the spring body, improves the dimensional accuracy of the parts, and enhances the dimensional consistency of the components.

[0059] This invention discloses a reaction spring, an armature spring assembly, and a relay. The spring body 1 has a U-shaped bend 16 extending upwards from one end between the spring body 1 and the connecting portion. This increases the flexibility of the spring body 1 and uses the U-shaped bend 16 to adjust the gap between the armature 2 and the iron core 3. This structure increases the flexibility of the reaction spring, uses the angle α at the root of the U-shaped bend to adjust the gap between the armature and the iron core, and simultaneously uses this angle to adjust the magnitude of the reaction force; the smaller the angle, the greater the reaction force. The reaction force can also be adjusted by changing the width D of the U-shaped bend; the wider the bend, the greater the reaction force.

[0060] The present invention discloses a reaction spring, an armature spring assembly, and a relay. The spring body 1 has a downwardly protruding convex 121 on the top wall of the groove 12, so that the convex 121 always abuts against the armature 2 when the armature 2 is actuated. This structure of the present invention, through the cooperation of the convex 121 and the armature 2, ensures that the tail of the armature 2 is in contact with the magnetic cylinder in any state, preventing poor engagement.

[0061] The present invention discloses a reaction spring, an armature spring assembly, and a relay, wherein the reaction spring 1 has a central hollow portion 17 at the U-shaped bend 16, so that the U-shaped bend 16 forms two side-by-side structures. This structure of the present invention allows adjustment of the reaction force by adjusting the width of the U-shaped bend through the central hollow portion.

[0062] This invention discloses a reaction spring, an armature spring assembly, and a relay. In the armature 2, a widening portion 21 is also provided at the position corresponding to the widening portion 18 of the reaction spring 1. In the widening portion 21 of the armature 2, a protrusion 211 is provided at the position corresponding to the through hole 15. The protrusion 211 of the armature 2 fits into the through hole of the reaction spring 1, and the reaction spring 1 and the armature 2 are fixed together by riveting. This structure of the invention, through a more reliable riveting fixing method between the reaction spring and the armature, prevents the armature from shifting within the reaction spring, increasing the reliability of the relay. Furthermore, during the riveting process, by tapping from top to bottom and using tooling, the spring can be shaped, i.e., it has a self-correcting effect on the included angle at the root of the U-shaped bend of the spring.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A reaction spring, comprising a spring body; characterized in that: One end of the reed body engages with the tail of the armature; the middle of the reed body has an upward bend, and the other end of the reed body engages with the transmission rod; the reed body has a connecting part for fixing with the armature; the bend causes the other end of the reed body to tilt toward one end of the reed body, and the other end of the reed body is bent into a horizontal shape and has a through hole for the transmission rod to pass through and engage.

2. The reaction spring according to claim 1, characterized in that: In the reed body, a U-shaped bend is provided extending upward between one end of the reed body and the connecting part to increase the flexibility of the reed body and to adjust the gap between the armature and the iron core using the U-shaped bend.

3. The reaction spring according to claim 2, characterized in that: One end of the reed body is provided with side wings on both sides of the width. The two side wings are bent downwards to form a groove with the slot facing downwards at one end of the reed body so as to cooperate with the tail of the armature.

4. The reaction spring according to claim 3, characterized in that: In the reed body, a connecting part for fixing to the armature is provided between the groove and the bending part; a U-shaped bend is provided protruding upward between the groove and the connecting part.

5. The reaction spring according to claim 4, characterized in that: In the reed body, a downwardly protruding bud is provided on the top wall of the groove, so that the bud always abuts against the armature when the armature is in motion.

6. The reaction spring according to claim 2 or 4, characterized in that: The reed body also has a central hollow section at the U-shaped bend, so that the U-shaped bend forms two side by side structures.

7. The reaction spring according to claim 2 or 4, characterized in that: In the reed body, a widening portion extending to both sides of the width is provided between the U-shaped bend and the bending portion, and the connecting portion is provided in the widening portion.

8. The reaction spring according to claim 7, characterized in that: The connecting part is a through hole.

9. The reaction spring according to claim 3, characterized in that: In the reed body, the end of the side wing is bent into a horizontal shape and extends obliquely towards the other end of the reed body in the horizontal direction.

10. An armature spring assembly, comprising an armature; characterized in that: It also includes the reaction spring as described in any one of claims 2-9, wherein the armature is fixedly connected to the reaction spring.

11. The armature spring assembly according to claim 10, characterized in that: In the reed body, a widening portion extending to both sides of the width is provided between the U-shaped bend and the bending portion. The connecting portion is provided in the widening portion and is a through hole. In the armature, a widening portion is also provided at the position corresponding to the widening portion of the reaction spring. In the widening portion of the armature, a protrusion is provided at the position corresponding to the through hole of the connecting portion. The protrusion of the armature is adapted to the through hole of the connecting portion and the reaction spring and the armature are fixed together by riveting.

12. A relay, characterized in that: Includes the reaction spring as described in any one of claims 1 to 9.

13. A relay, characterized in that: Includes the armature spring assembly as described in any one of claims 10 to 11.

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