Relay

Abstract

The utility model discloses a relay which comprises a movable contact piece, a push rod assembly used for pushing the movable contact piece to move in a reciprocating mode and a supporting piece erected on the outer side of the push rod assembly and kept fixed, the supporting piece is provided with two supporting side plates, and the push rod assembly comprises a first support. Side connecting plates opposite to the two supporting side plates are arranged on the two sides of the first support correspondingly, rotation limiting structures used for limiting the push rod assembly to rotate are arranged between the side connecting plates and the supporting side plates, and the rotation limiting structures and the supporting pieces are both made of metal materials. According to the utility model, abnormal relay connection caused by rotation of the push rod assembly can be effectively prevented, the risk of foreign matter generation is low, and relay failure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control devices, and particularly relates to a relay. Background Art

[0002] The design of a direct-acting DC relay usually sets a moving contact on a push rod assembly, and an electromagnetic driving mechanism drives the push rod assembly to drive the moving contact to move up and down, so that the moving contact is closed with a static contact to realize the on-off control of the loop. In order to prevent the push rod assembly from rotating during the process of pushing the moving contact to conduct the loop, it is necessary to limit the axial freedom of the moving assembly (the moving contact and the push rod assembly).

[0003] At present, the common method is to set ribs on the ceramic cover, and limit the rotation of the moving assembly by the moving contact on the push rod assembly and the ribs of the ceramic cover. However, this kind of limiting method has the following defects: 1. The moving contact and the ribs of the ceramic cover are severely scratched and worn, resulting in damage to the moving contact; 2. The dimensional accuracy control requirements of the ceramic cover are high, and it is difficult to form the ceramic cover. Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Summary of the Utility Model

[0004] The problem to be solved by the utility model is to provide a relay to overcome the defects of high foreign object risk and large processing and forming difficulty in the existing limiting method of the push rod assembly.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a relay, comprising: a moving contact, a push rod assembly for pushing the moving contact to reciprocate, and a support member fixedly arranged outside the push rod assembly. The support member is provided with two support side plates. The push rod assembly includes a first bracket, and side connection plates opposite to the two support side plates are respectively arranged on both sides of the first bracket. A rotation limiting structure for limiting the push rod assembly to rotate is arranged between the side connection plate and the support side plate, wherein both the rotation limiting structure and the support member are made of metal material.

[0006] As a further improvement of the utility model, the rotation limiting structure includes a first limiting portion and a limiting plane distributed along the pushing direction of the push rod assembly. Any one of the first limiting portion and the limiting plane is arranged on the support side plate, and the remaining one of the two is arranged on the side connection plate. The first limiting portion and the limiting plane are used in cooperation to limit the push rod assembly to rotate.

[0007] As a further improvement of the present utility model, the length of the limiting plane along the pushing direction of the push rod assembly is greater than the movement stroke of the push rod assembly, so that the first limiting portion can always face the limiting plane during the movement of the push rod assembly.

[0008] As a further improvement of the present utility model, the first limiting portion is provided on the supporting side plate and protrudes towards the side connecting plate, and the limiting plane is provided on the outer side surface of the side connecting plate and faces the first limiting portion.

[0009] As a further improvement of the present utility model, the first limiting portion is provided on the side connecting plate and protrudes towards the supporting side plate, the supporting side plate is provided with a second limiting portion protruding towards the side connecting plate, and the limiting plane is provided on the side surface of the second limiting portion facing the first limiting portion.

[0010] As a further improvement of the present utility model, the second limiting portion is provided with a rib on the limiting plane, and the rib extends towards the pushing direction of the push rod assembly.

[0011] As a further improvement of the present utility model, the first limiting portion is integrally formed by stamping and bending the side connecting plate; the second limiting portion is integrally formed by stamping and bending the supporting side plate.

[0012] As a further improvement of the present utility model, avoidance windows are provided on both sides of the first bracket, so that two side connecting plates are formed on both sides of the first bracket, and the four side connecting plates are distributed in a rectangle. The first limiting portion or the limiting plane is provided on two opposite side connecting plates or two diagonally distributed side connecting plates or all four side connecting plates; the number of the first limiting portions is the same as that of the limiting planes and they correspond to each other one by one.

[0013] As a further improvement of the present utility model, the first limiting portion abuts against the limiting plane, or the first limiting portion has a clearance fit with the limiting plane.

[0014] As a further improvement of the present utility model, the relay further includes a magnetic pole piece and a cover body. Insulating blocks are fixed at the bottoms of the two supporting side plates. The support member is supported on the magnetic pole piece through the insulating blocks and is limited by a positioning structure provided between the insulating blocks and the magnetic pole piece to limit the movement of the support member along the plane where the magnetic pole piece is located; an elastic member is provided at the top of the support member, and the cover body is fixedly connected to the magnetic pole piece and presses the support member through the elastic member.

[0015] The beneficial effects of the present utility model are as follows: The present utility model provides a relay. By providing a rotation limiting structure between the support member and the first bracket, it can effectively prevent abnormal connection of the relay caused by the rotation of the push rod assembly. Moreover, both the rotation limiting structure and the support member in the present utility model are made of conductive metal materials, which are easy to process and have a simple forming method. During the movement of the push rod assembly in the rotation limiting structure, metal-to-metal contact occurs, with a low risk of generating foreign objects. And even if wear occurs, the generated metal debris is conductive and will not cause the relay to fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 6 is a perspective view of the first embodiment of the relay of the present utility model;

[0017] Figure 2 FIG. 10 is a cross-sectional view of the first embodiment of the relay of the present utility model;

[0018] Figure 3 FIG. 14 is a right view of the first embodiment of the relay of the present utility model after removing the cover;

[0019] Figure 4 FIG. 18 is a perspective view of the movable contact piece and the push rod assembly of the first embodiment of the relay of the present utility model;

[0020] Figure 5 FIG. 22 is a perspective view of the support member and the magnetic pole piece of the first embodiment of the relay of the present utility model;

[0021] Figure 6 FIG. 26 is a right view of the support member and the push rod assembly of the second embodiment of the relay of the present utility model;

[0022] Figure 7 FIG. 30 is a perspective view of the support member of the second embodiment of the relay of the present utility model;

[0023] Figure 8 FIG. 34 is a right view of the support member and the push rod assembly of the third embodiment of the relay of the present utility model.

[0024] The following is an explanation with reference to the drawings:

[0025] 1. Movable contact piece; 2. Support member; 201. Support side plate; 202. Second limiting portion; 203. Rib; 204. Elastic member; 3. First bracket; 301. Side connecting plate; 302. Avoidance window; 231. First limiting portion; 232. Limiting plane; 4. Magnetic pole piece; 401. Positioning convex bump; 5. Cover; 6. Insulating block; 7. Push rod; 8. Push rod seat; 9. Contact spring; 10. Lower armature; 11. Upper armature; 12. Static contact. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following is a detailed description of the preferred embodiments of the present utility model with reference to the drawings.

[0027] Embodiment 1

[0028] Referring to Figures 1 to 5 , the present utility model provides a relay, including: a moving contact piece 1, a support member 2 and a push rod assembly. The moving contact piece 1 is installed on the push rod assembly, and the push rod assembly is used to push the moving contact piece 1 to reciprocate up and down when the relay is powered on and off. The support member 2 is in an inverted U shape, which is erected outside the push rod assembly and remains fixed; the support member 2 is provided with two opposite support side plates 201, and both support side plates 201 are distributed along the pushing direction of the push rod assembly, that is, the vertical direction.

[0029] Further, the push rod assembly includes a first bracket 3. In this embodiment, the first bracket 3 is in a rectangular frame shape, which is located inside the support member 2, and the moving contact piece 1 passes through the first bracket 3. Side connecting plates 301 opposite to the two support side plates 201 are respectively provided on both sides of the first bracket 3, and a rotational limit structure is provided between the side connecting plates 301 and the support side plates 201. During the process of the push rod assembly pushing the moving contact piece 1 to move, the rotational limit structure between the side connecting plates 301 and the support side plates 201 can limit the push rod assembly from making a rotational movement.

[0030] By providing a rotational limit structure between the support member 2 and the first bracket 3 in the relay of the present utility model, it can effectively prevent the push rod assembly from rotating and causing abnormal connection of the relay. Moreover, both the rotational limit structure and the support member 2 in the present utility model are made of conductive metal materials, which are easy to process and have a simple forming method. During the movement of the push rod assembly, the contact in the rotational limit structure occurs between metal parts, and the risk of generating foreign objects is small. And even if wear occurs, the generated metal debris is conductive and will not cause the relay to fail.

[0031] Furthermore, the rotational limit structure includes a first limit portion 231 and a limit plane 232 distributed along the pushing direction and the vertical direction of the push rod assembly. Any one of the first limit portion 231 and the limit plane 232 is provided on the support side plate 201, and the remaining one of the two is provided on the side connecting plate 301. The first limit portion 231 and the limit plane 232 are used in cooperation to limit the push rod assembly from making a rotational movement.

[0032] As Figures 3 to 5 shown, in this embodiment, specifically, the first limit portion 231 is provided on the side connecting plate 301 and protrudes towards the support side plate 201; a second limit portion 202 protruding towards the side connecting plate 301 is provided on the support side plate 201, and the limit plane 232 is provided on the side of the second limit portion 202 facing the first limit portion 231.

[0033] Among them, the first limiting part 231 can be abutted against the limiting plane 232 of the second limiting part 202, or the first limiting part 231 can be in clearance fit with the limiting plane 232. The latter is preferred because: leaving a certain small gap between the first limiting part 231 and the limiting plane 232 can prevent jamming between the first bracket 3 and the second limiting part 202 on the support member 2 during the movement of the push rod assembly, and avoid the situation that the moving contact piece 1 cannot be driven to move, resulting in the inability to control the on-off.

[0034] Since the support member 2 remains fixed, that is, the second limiting part 202 remains stationary, while the first bracket 3 moves up and down following the push rod assembly. The limiting plane 232 on the second limiting part 202 is used to limit the first limiting part 231 of the first bracket 3 moving up and down, so as to achieve the purpose of restricting the rotation of the push rod assembly and prevent abnormal connection of the relay caused by the rotation of the push rod assembly.

[0035] It should be noted that in this embodiment, the length of the limiting plane 232 in the pushing direction of the push rod assembly, that is, the vertical direction, is greater than the movement stroke of the push rod assembly, so that the first limiting part 231 can always be opposite to the limiting plane 232 during the movement of the push rod assembly, ensuring that the pushing assembly can be restricted by the limiting plane 232 on the second limiting part 202 whether the relay is in the suction state or the release state, and preventing it from rotating.

[0036] Refer to Figure 4 , avoiding windows 302 are provided on both sides of the first bracket 3, so that two side connecting plates 301 are formed on both sides of the first bracket 3; in this embodiment, the first limiting parts 231 are provided on two opposite side connecting plates 301. Correspondingly, a second limiting part 202 is provided on each of the two support side plates 201 of the support member 2. Through the one-to-one correspondence and cooperation between the two first limiting parts 231 and the limiting planes 232 on the two second limiting parts 202, reliable rotational limitation of the push rod assembly is achieved.

[0037] Certainly, in other embodiments of the present invention, the first limiting parts 231 can also be provided on two diagonally distributed side connecting plates 301 or on all four side connecting plates 301. Correspondingly, the second limiting parts 202 with the same number and one-to-one correspondence as the first limiting parts 231 are provided on the two support side plates 201 of the support member 2.

[0038] In this embodiment, the first limiting part 231 is integrally formed by stamping and bending the side connecting plate 301. The shape of the first limiting part 231 can be, but is not limited to, C-shaped. The first limiting part 231 contacts the limiting plane 232 by relying on a part of its outer arc surface, so as to reduce wear and improve the smoothness of the sliding contact between the first limiting part 231 and the limiting plane 232, and avoid jamming.

[0039] In this embodiment, the second limiting portion 202 is formed by a boss integrally stamped and bent from the support side plate 201.

[0040] The rotation limiting structure in the present utility model is formed in this way, with very simple processing, easy control of precision, and easy assembly of the two.

[0041] Optionally, the metal material used for the support member 2, the first bracket 3, and the rotation limiting structure therebetween may be, but is not limited to, iron and its alloys, copper and its alloys, stainless steel, etc.

[0042] Refer to Figure 2 and Figure 5 The relay of the present utility model further includes a magnetic pole piece 4 and a cover body 5. Insulating blocks 6 are fixed to the bottoms of both support side plates 201. The support member 2 is supported on the magnetic pole piece 4 through the insulating blocks 6 and is limited by a positioning structure provided between the insulating blocks 6 and the magnetic pole piece 4 to restrict the movement of the support member 2 in the direction of the plane where the magnetic pole piece 4 is located.

[0043] Specifically, the positioning structure includes a first positioning portion provided at the bottom of the insulating block 6 and a second positioning portion provided at the top of the magnetic pole piece 4. One of the first positioning portion and the second positioning portion is in the form of a groove, and the other is in the form of a convex hull matching therewith. The first positioning portion and the second positioning portion are inserted and matched to restrict the movement of the support member 2 in the direction of the plane where the magnetic pole piece 4 is located. This positioning structure is easy to process and form, and the assembly is very convenient.

[0044] In this embodiment, the first positioning portion provided at the bottom of the insulating block 6 is specifically, but not limited to, two circular positioning grooves, and the second positioning portion provided at the top of the magnetic pole piece 4 is specifically, but not limited to, four circular positioning convex hulls 401. The positioning convex hulls 401 and the positioning grooves are inserted and matched one by one to achieve positioning.

[0045] Furthermore, an installation plate is provided at the top of the support member 2. The installation plate is integrally connected to the upper ends of the two support side plates 201. An elastic member 204 is provided on the installation plate. The cover body 5 is fixedly welded to the magnetic pole piece 4 through a connection ring and presses the support member 2 through the elastic member 204.

[0046] The present utility model realizes the installation and fixation of the support member 2 by supporting the support member 2 on the magnetic pole piece 4 through the insulating blocks 6 and performing preliminary limitation by the positioning structure, and then directly pressing the support member 2 by the cover body 5 through the elastic member 204. This fixing method is simple, the assembly is convenient, it can improve production efficiency, reduce manufacturing costs, and does not require brazing and riveting processes, avoiding the risk of air leakage of the magnetic pole piece 4.

[0047] Such as Figure 5As shown, in this embodiment, there are but are not limited to two elastic members 204, which are symmetrically distributed on both sides of the mounting plate and are integrally connected to the mounting plate. The two elastic members 204 can be obtained by stamping the two sides of the mounting plate, and the two elastic members 204 are in the shape of long strips with a certain degree of curvature, and the length of the elastic member 204 is substantially the same as the length of the mounting plate. One end of the elastic member 204 is used as a connecting portion and is integrally connected to the mounting plate; the other end of the elastic member 204 is used as an extension portion and is tilted upward on the mounting plate, which is used to elastically abut against the cover body 5.

[0048] Optionally, the cover body 5 is made of ceramic material and is rectangular with a top but no bottom.

[0049] Furthermore, the push rod assembly includes a push rod 7, a push rod seat 8 and a contact spring 9. The push rod seat 8 is made of plastic. The bottom of the first bracket 3 and the top of the push rod 7 are integrally injection molded in the push rod seat 8 and do not contact each other. The moving contact piece 1 crosses the first bracket 3, and the bottom of the moving contact piece 1 is clamped with a lower armature 10. The contact spring 9 is installed between the push rod seat 8 and the lower armature 10. The contact spring 9 always applies an upward elastic force to the lower armature 10 and pushes the moving contact piece 1 upward against the top of the first bracket 3. The lower armature 10 is U-shaped, and its two side plates extend upward from the avoidance windows 302 on both sides of the first bracket 3; the bottom of the mounting plate of the support member 2 is fixed with an upper armature 11, and the upper armature 11 and the lower armature 10 are arranged relative to each other.

[0050] In addition, the relay of the present invention further comprises a pair of stationary contacts 12 disposed on the top of the cover 5 and an electromagnetic drive mechanism arranged below the pole piece 4, wherein the electromagnetic drive mechanism adopts conventional technical means in this field and will not be elaborated herein.

[0051] The first bracket 3, the push rod seat 8 and the contact spring 9 are all located above the pole piece 4. A through hole is provided in the middle of the pole piece 4. The push rod 7 slides through the through hole, and the lower end of the push rod 7 is connected to the electromagnetic drive mechanism.

[0052] When the electromagnetic drive mechanism is energized, the electromagnetic drive mechanism drives the push rod assembly to push the moving contact piece 1 to move upward and connect with the two stationary contacts 12. The magnetic field generated when the current flows through the moving contact piece 1 can magnetize the upper armature 11 and the lower armature 10, so that suction is generated between the upper armature 11 and the lower armature 10. Since the upper armature 11 is fixed on the support member 2 and remains stationary, the suction force on the lower armature 10 provides an upward compensation force to the moving contact piece 1, thereby improving the short-circuit resistance.

[0053] It can be seen that the support member 2 in the present utility model can not only cooperate with the first bracket 3 to realize the rotational limit of the push rod assembly, but also be used to mount the upper armature 11, accurately control the distance between the upper armature 11 and the lower armature 10, and ensure the short-circuit resistance performance of the product; at the same time, under the action of the insulating block 6, the risk of high-voltage breakdown can also be avoided.

[0054] Embodiment 2

[0055] Refer to Figure 6 and Figure 7 In this embodiment, the difference from Embodiment 1 is that: the second limiting portion 202 and the limiting plane 232 are both provided with convex ribs 203, and the convex ribs 203 extend in the pushing direction of the push rod assembly, that is, the vertical direction. The convex ribs 203 are also formed by integral stamping.

[0056] Furthermore, in this embodiment, the length of the convex rib 203 in the pushing direction of the push rod assembly, that is, the vertical direction, is greater than the movement stroke of the push rod assembly, so that the first limiting portion 231 can always be opposite to the convex rib 203 during the movement of the push rod assembly, ensuring that the pushing assembly can be restricted by the convex rib 203 on the limiting plane 232 whether the relay is in the suction state or the release state, preventing it from rotating.

[0057] Preferably, the edges of the convex rib 203 are all provided with round chamfers to reduce the metal debris generated by scraping.

[0058] In this embodiment, by providing the convex rib 203 on the limiting plane 232 and using the convex rib 203 to contact the first limiting portion 231, the wear can be reduced, and the smoothness of the sliding contact between the first limiting portion 231 and the limiting plane 232 can also be improved, avoiding jamming.

[0059] Embodiment 3

[0060] The difference between this embodiment and Embodiment 1 is that: the positions of the first limiting portion 231 and the limiting plane 232 are different.

[0061] Specifically, as Figure 8 shown, in this embodiment, there is no design of the second limiting portion 202 on the support side plate 201, the first limiting portion 231 is provided on the support side plate 201 and protrudes towards the side connecting plate 301; the outer side surface of the side connecting plate 301 opposite to the first limiting portion 231 is the limiting plane 232.

[0062] In this embodiment, without changing the first bracket 3, the outer side surface of the side connecting plate 301 of the first bracket 3 is used as the limiting plane 232. At the same time, a protruding first limiting portion 231 is provided on the support member 2. The first limiting portion 231 is also integrally formed by stamping. Since the support member 2 remains fixed, that is, the first limiting portion 231 remains stationary, while the first bracket 3 moves up and down following the push rod assembly. The first limiting portion 231 is used to limit the limiting plane 232 of the first bracket 3 moving up and down, so as to achieve the purpose of restricting the rotation of the push rod assembly and prevent the abnormal connection of the relay caused by the rotation of the push rod assembly.

[0063] In summary, the relay of the present invention can effectively prevent the abnormal connection of the relay caused by the rotation of the push rod assembly by providing a rotation limiting structure between the support member 2 and the first bracket 3. Moreover, the rotation limiting structure and the support member 2 in the present invention are both made of conductive metal materials, which are easy to process and have a simple forming method. During the movement of the push rod assembly, the contact in the rotation limiting structure is between metal parts, and the risk of generating foreign objects is small. And even if wear occurs, the generated metal debris is conductive and will not cause the failure of the relay.

[0064] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention, and 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 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 technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A relay, comprising a moving contact piece (1), a push rod assembly for pushing the moving contact piece (1) to reciprocate, and a support member (2) mounted on the outer side of the push rod assembly and kept stationary, wherein the support member (2) is provided with two supporting side plates (201), and the push rod assembly comprises a first bracket (3), and both sides of the first bracket (3) are provided with side connecting plates (301) respectively opposite to the two supporting side plates (201), characterized in that: A rotation limiting structure for limiting the rotational movement of the push rod assembly is provided between the side connecting plate (301) and the supporting side plate (201), wherein the rotation limiting structure and the supporting member (2) are both made of metal.

2. The relay according to claim 1, characterized in that: The rotational limiting structure includes a first limiting portion (231) and a limiting plane (232) distributed along the pushing direction of the push rod assembly. Any one of the first limiting portion (231) and the limiting plane (232) is arranged on the supporting side plate (201), and the other of the two is arranged on the side connecting plate (301). The first limiting portion (231) and the limiting plane (232) are used in conjunction with each other to limit the rotational movement of the push rod assembly.

3. The relay according to claim 2, characterized in that: The length of the limiting plane (232) along the pushing direction of the push rod assembly is greater than the movement stroke of the push rod assembly, so that the first limiting portion (231) can always be opposite to the limiting plane (232) during the movement of the push rod assembly.

4. The relay according to claim 2, characterized in that: The first limiting portion (231) is arranged on the supporting side plate (201) and protrudes toward the side connecting plate (301), and the limiting plane (232) is arranged on the outer side surface of the side connecting plate (301) and is opposite to the first limiting portion (231).

5. The relay according to claim 2, characterized in that: The first limiting portion (231) is arranged on the side connecting plate (301) and protrudes toward the supporting side plate (201); the supporting side plate (201) is provided with a second limiting portion (202) protruding toward the side connecting plate (301); and the limiting plane (232) is arranged on a side surface of the second limiting portion (202) facing the first limiting portion (231).

6. The relay according to claim 5, characterized in that: The second limiting portion (202) is provided with a convex rib (203) on the limiting plane (232), and the convex rib (203) extends towards the pushing direction of the push rod assembly.

7. The relay according to claim 5, characterized in that: The first limiting portion (231) is formed by integrally stamping and bending the side connecting plate (301); and the second limiting portion (202) is formed by integrally stamping and bending the supporting side plate (201).

8. The relay according to claim 2, characterized in that: Avoidance windows (302) are provided on both sides of the first bracket (3), so that two side connecting plates (301) are formed on both sides of the first bracket (3), and the four side connecting plates (301) are distributed in a rectangular shape, wherein the first limiting portion (231) or the limiting plane (232) is provided on two opposite side connecting plates (301) or two diagonally distributed side connecting plates (301) or four side connecting plates (301); the first limiting portions (231) and the limiting planes (232) are the same in number and correspond one to one.

9. The relay according to claim 2, characterized in that: The first limiting portion (231) abuts against the limiting plane (232), or the first limiting portion (231) and the limiting plane (232) are clearance-matched.

10. The relay according to claim 1, characterized in that: It also comprises a magnetic pole piece (4) and a cover body (5), the bottom of the two supporting side plates (201) are both fixed with an insulating block (6), the supporting member (2) is supported on the magnetic pole piece (4) through the insulating block (6), and is limited by a positioning structure provided between the insulating block (6) and the magnetic pole piece (4) to limit the movement of the supporting member (2) along the plane where the magnetic pole piece (4) is located; an elastic member (204) is provided on the top of the supporting member (2), the cover body (5) is fixedly connected to the magnetic pole piece (4) and presses the supporting member (2) through the elastic member (204).

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