Movable iron core fixing structure and high-voltage direct-current relay

Abstract

The utility model discloses a movable iron core fixing structure and a high voltage direct current relay, the movable iron core fixing structure comprises a movable iron core and a push rod, one end of the push rod is used for connecting a movable contact piece, the middle part of the movable iron core is provided with an inner hole, and the inner hole is fixed on the push rod in a penetrating manner; the structure further comprises at least one gasket, the push rod is provided with a limiting part located between one end of the push rod and the inner hole, the push rod is sleeved with the gasket, and the gasket abuts against and is limited between the limiting part and the movable iron core. According to the utility model, the magnetic distance between the movable iron core and the yoke plate can be changed by using the gasket, so that the purpose of adjusting the magnetic attraction force of the magnetic circuit part is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a moving iron core fixing structure and a high-voltage direct current relay. Background Art

[0002] A high-voltage DC relay is a type of relay. A high-voltage DC relay usually includes a contact part, a magnetic circuit part, and a push rod. The contact part and the magnetic circuit part are distributed up and down. The contact part includes two static contacts and a moving contact piece. The magnetic circuit part includes a moving iron core, a coil frame, and a yoke iron plate. The two ends of the moving contact piece correspond to the two static contacts one by one. One end of the push rod is connected to the moving contact piece, and the other end of the push rod is fixedly connected to the moving iron core. The moving iron core is located in the coil frame, and the yoke iron plate is located above the coil frame and below the moving contact piece. This type of high-voltage DC relay has the following shortcomings: the magnetic spacing between the yoke iron plate and the moving iron core is fixed, which makes it impossible to adjust the magnetic attraction of the magnetic circuit part. Utility Model Content

[0003] The utility model aims at the technical problems existing in the prior art and provides a moving iron core fixing structure and a high-voltage DC relay, which can make the magnetic distance between the yoke iron plate and the moving iron core variable through structural improvement.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a moving iron core fixing structure, including a moving iron core and a push rod, one end of the push rod is used to connect the moving contact piece, an inner hole is provided in the middle of the moving iron core, and the inner hole is passed through and fixed on the push rod; it also includes at least one gasket, and the push rod is provided with a limiting portion located between one end thereof and the inner hole, the gasket is sleeved outside the push rod, and the gasket is pressed against and limited between the limiting portion and the moving iron core.

[0005] Furthermore, the limiting portion is a circle of step surfaces facing the inner hole.

[0006] Furthermore, the limiting portion is a boss protruding from the outer surface of the push rod.

[0007] Furthermore, the boss surrounds the push rod, or the number of the boss is multiple, and the multiple bosses are distributed at intervals along the circumference of the push rod.

[0008] Furthermore, the movable iron core is provided with a recessed groove leading to the inner hole on one axial side, the bottom surface of the recessed groove faces the limiting portion, and the gasket is pressed against and limited between the limiting portion and the bottom surface of the recessed groove.

[0009] Furthermore, the inner hole is a threaded hole and is threadedly connected to the push rod.

[0010] Furthermore, the other end of the push rod passes through the inner hole and is threadedly connected with a nut.

[0011] Furthermore, the gasket is made of elastic material.

[0012] Furthermore, there are multiple gaskets, and the number of gaskets sleeved on the push rod can be increased or decreased, and the thickness of each gasket is consistent, or the thickness of at least two gaskets is inconsistent.

[0013] The utility model further provides a high-voltage DC relay, including a coil frame and a yoke iron plate, wherein the yoke iron plate is located on one side of the axial direction of the coil frame; and also includes a moving iron core fixing structure as described in the utility model above, wherein the moving iron core is located in the coil frame, the push rod is movably inserted through the yoke iron plate, and the gasket is located between the moving iron core and the yoke iron plate.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Since the utility model further includes at least one gasket, a limiting portion is provided on the push rod between one end thereof and the inner hole of the moving iron core, and the gasket is sleeved outside the push rod and is pressed against and limited between the limiting portion and the moving iron core. The utility model can use the gasket to change the magnetic spacing between the moving iron core and the yoke iron plate, thereby achieving the purpose of adjusting the magnetic attraction of the magnetic circuit part.

[0016] 2. The inner hole of the moving iron core is a threaded hole, and is threadedly connected to the push rod, making the connection between the moving iron core and the push rod more convenient. In particular, when the gasket is made of elastic material, the stability of the connection between the moving iron core and the push rod can be improved.

[0017] 3. Since there are multiple gaskets, and the number of gaskets on the push rod can be increased or decreased, the thickness of each gasket is consistent, or the thickness of at least two gaskets is inconsistent, the utility model can increase or decrease the number of gaskets used according to actual needs, or adjust the magnetic spacing between the moving iron core and the yoke iron plate by selecting gaskets of appropriate thickness, so that the magnetic attraction of the magnetic circuit part can be adjusted more accurately.

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the movable iron core fixing structure and the high-voltage DC relay of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the high-voltage DC relay of the utility model;

[0020] Figure 2 It is a front view of the high voltage DC relay of the utility model;

[0021] Figure 3 yes Figure 2 AA section view;

[0022] In the figure, 1, static contact, 2, moving contact piece, 3, inner support cover, 4, yoke iron plate, 5, coil frame, 6, moving iron core, 61, inner hole, 62, sink groove, 7, push rod, 71, step surface, 8, gasket, 9, yoke iron cylinder, 10, outer shell, 20, top cover. DETAILED DESCRIPTION

[0023] In the present invention, the directions or positional relationships indicated by "upper", "lower", "inner", "outer" and the like in the description are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In addition, in the description of the present invention, unless otherwise specified, "at least one" means one or more, "at least two" means two or more, and "plurality" means two or more. In the description of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, and can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-Figure 3 As shown, a high-voltage DC relay of the utility model comprises a moving contact piece 2, two stationary contacts 1, an inner support cover 3, a coil frame 5 and a yoke iron plate 4, wherein the two stationary contacts 1 are fixed on the top of the inner support cover 3, and the bottoms of the two stationary contacts 1 extend into the inner support cover 3 respectively, and are matched with the two ends of the moving contact piece 2 located in the inner support cover 3 in a one-to-one correspondence. The coil frame 5 is located below the inner support cover 3, and the yoke iron plate 4 is located on one side of the axial direction of the coil frame 5, specifically, the yoke iron plate 4 is located on the upper side of the coil frame 5 and below the inner support cover 3.

[0026] The high-voltage DC relay of the utility model further includes a moving iron core fixing structure, which includes a moving iron core 6, a push rod 7 and at least one gasket 8. The moving iron core 6 is located in the coil frame 5. One end of the push rod 7 is connected to the moving contact piece 2, and the push rod 7 is movably arranged in the yoke iron plate 4. An inner hole 61 is arranged in the middle of the moving iron core 6, and the inner hole 61 is arranged and fixed on the push rod 7. The push rod 7 is provided with a limiting portion located between one end thereof and the inner hole 61. The gasket 8 is sleeved outside the push rod 7, and the gasket 8 is pressed against and limited between the limiting portion and the moving iron core 6. Therefore, the gasket 8 is located between the moving iron core 6 and the yoke iron plate 4.

[0027] In this embodiment, if Figure 3 As shown, the limiting portion is a circle of step surfaces 71 facing the inner hole 61, but is not limited to this. In other embodiments, the limiting portion is a boss protruding from the outer surface of the push rod 7, and the boss surrounds the push rod 7, that is, the boss is annular, or the number of bosses is multiple, and the multiple bosses are distributed at intervals along the circumference of the push rod 7.

[0028] In this embodiment, the moving iron core 6 is provided with a recessed groove 62 leading to the inner hole 61 on one axial side, the bottom surface of the recessed groove 62 faces the limiting portion (i.e., the step surface 71), and the gasket 8 is pressed against and limited between the limiting portion (i.e., the step surface 71) and the bottom surface of the recessed groove 62.

[0029] As a preferred structure, the inner hole 61 is a threaded hole and is threadedly connected to the push rod 7. In other embodiments, the other end of the push rod passes through the inner hole of the moving iron core and is threadedly connected with a nut. The gasket 8 is preferably made of elastic material, so that the push rod 7 and the moving iron core 6 are more stable after being connected.

[0030] The number of the gasket 8 can be one or more, and the thickness of each gasket 8 is consistent, or the thickness of at least two gaskets 8 is inconsistent. When the number of the gasket 8 is multiple, the number of the gasket 8 sleeved on the push rod 7 can be increased or decreased.

[0031] In this embodiment, the utility model further comprises a yoke iron cylinder 9, a shell 10, a top cover 20, the inner support cover 3, the yoke iron plate 4, and the coil frame 5 are all in the yoke iron cylinder 9, the yoke iron cylinder 9 is located in the shell 10, and the top cover 20 is connected to the top opening of the shell 10. Two static contacts 1 are respectively provided in the top cover 20.

[0032] The utility model can use the gasket 8 to change the magnetic distance between the moving iron core 6 and the yoke iron plate 4. In particular, the magnetic distance between the moving iron core 6 and the yoke iron plate 4 can be adjusted by increasing or decreasing the number of gaskets 8 used, or by selecting gaskets 8 of appropriate thickness, thereby achieving the purpose of adjusting the magnetic attraction force of the magnetic circuit part and making the adjustment of the magnetic attraction force of the magnetic circuit part more precise.

[0033] The utility model provides a moving iron core fixing structure and a high-voltage DC relay, and the uninvolved parts are the same as the prior art or can be implemented by using the prior art.

[0034] The above embodiments are only used to further illustrate a moving iron core fixing structure and a high-voltage DC relay of the utility model, but the utility model 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 utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. A moving iron core fixing structure, comprising a moving iron core and a push rod, one end of the push rod is used to connect a moving contact piece, an inner hole is provided in the middle of the moving iron core, and the inner hole is penetrated and fixed on the push rod; characterized in that: It also includes at least one gasket, the push rod is provided with a limiting portion located between one end thereof and the inner hole, the gasket is sleeved outside the push rod, and the gasket is pressed against and limited between the limiting portion and the moving iron core.

2. The moving iron core fixing structure according to claim 1, characterized in that: The limiting portion is a circle of stepped surfaces facing the inner hole.

3. The moving iron core fixing structure according to claim 1, characterized in that: The limiting portion is a boss protruding from the outer surface of the push rod.

4. The moving iron core fixing structure according to claim 3, characterized in that: The boss surrounds the push rod, or the number of the boss is multiple, and the multiple bosses are distributed at intervals along the circumference of the push rod.

5. The moving iron core fixing structure according to any one of claims 1 to 4, characterized in that: The movable iron core is provided with a recessed groove leading to the inner hole on one axial side, the bottom surface of the recessed groove faces the limiting portion, and the gasket is pressed against and limited between the limiting portion and the bottom surface of the recessed groove.

6. The moving iron core fixing structure according to claim 1, characterized in that: The inner hole is a threaded hole and is threadedly connected to the push rod.

7. The moving iron core fixing structure according to claim 1, characterized in that: The other end of the push rod passes through the inner hole and is threadedly connected with a nut.

8. The moving iron core fixing structure according to claim 1, 6 or 7, characterized in that: The gasket is made of elastic material.

9. The moving iron core fixing structure according to claim 1, characterized in that: There are multiple gaskets, and the number of gaskets sleeved on the push rod can be increased or decreased. The thickness of each gasket is consistent, or the thickness of at least two gaskets is inconsistent.

10. A high voltage DC relay, comprising a coil frame and a yoke iron plate, wherein the yoke iron plate is located on one side of the coil frame in the axial direction; characterized in that: It also includes a moving iron core fixing structure as described in any one of claims 1 to 9, wherein the moving iron core is located in the coil frame, the push rod is movably inserted through the yoke plate, and the gasket is located between the moving iron core and the yoke plate.

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