A contactor with a rolling-contact supported contact

Abstract

A contactor with a rolling - fit contact support. It mainly solves the problem that most of the current contact supports of contactors adopt sliding fits with the housing, resulting in excessive friction between the contact support and the housing, which will affect the closing performance of the product and cause the closing voltage of the product to be too high. The characteristics are as follows: The contact support drives the moving contact piece and the static contact piece to be in electrical contact or electrical disconnection under the action of the opening - closing device (5). A rolling element (6) is provided on the contact support and / or the housing. When the contact support moves, it has a rolling fit with the housing through the rolling element. The present invention provides a contactor with a rolling - fit contact support. When the contact support moves, it has a rolling fit with the housing through the rolling element, reducing the friction force, thereby reducing the closing voltage of the product.

Description

Technical Field

[0001] The present invention relates to the field of contactors, and particularly to a contactor with a rolling - fit contact support. Background Art

[0002] Contactors are divided into AC contactors (voltage AC) and DC contactors (voltage DC) for use in power, power distribution, and power consumption applications. In a broad sense, a contactor refers to an electrical appliance in industrial electricity that uses a coil to pass an electric current to generate a magnetic field, causing the contacts to close to control the load.

[0003] The working principle of a contactor is as follows: When the contactor coil is powered on, the coil current generates a magnetic field. The generated magnetic field causes the static iron core to generate an electromagnetic suction force to attract the moving iron core, and drives the contact system of the AC contactor to act. The normally - closed contacts open, and the normally - open contacts close, and the two are linked. When the coil is powered off, the electromagnetic suction force disappears, and the armature is released under the action of the release spring, causing the contacts to return to their original state, the normally - open contacts open, and the normally - closed contacts close.

[0004] Most of the current contact supports and the housing adopt a sliding fit. The excessive friction between the contact support and the housing will affect the suction performance of the product, resulting in a high suction voltage of the product. Summary of the Invention

[0005] In order to overcome the deficiencies of the background art, the present invention provides a contactor with a rolling - fit contact support, mainly solving the problem that most of the current contact supports and the housing of contactors adopt a sliding fit, and the excessive friction between the contact support and the housing will affect the suction performance of the product, resulting in a high suction voltage of the product.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A contactor with a rolling - fit contact support includes a housing. A moving contact piece and a static contact piece are arranged in the housing. The housing also has a contact support with a movable fit. The moving contact piece is installed on the contact support. Under the action of a separating and combining device, the contact support drives the moving contact piece to make electrical contact or electrical disconnection with the static contact piece.

[0008] Rolling elements are provided on the contact support and / or the housing. When the contact support moves, it makes a rolling fit with the housing through the rolling elements.

[0009] The rolling elements are arranged on the contact support, and rolling grooves for rolling - fit with the rolling elements are provided on the inner wall of the housing.

[0010] A cross - bar is provided at the bottom of the contact support. The rolling elements are provided on the front and rear end faces of at least one end of the cross - bar. The front and rear rolling elements make rolling fits with the front and rear inner walls of the rolling groove.

[0011] The cross arm is provided with an installation groove, and the rolling member is installed in the installation groove through a connecting member detachably connected to the installation groove.

[0012] The connecting member includes a main board, side boards are provided on both sides of the main board, a rotating shaft is provided between the side boards, and the rolling member is sleeved outside the rotating shaft.

[0013] The connecting member is arranged in the installation groove, the top of the connecting member contacts the inner wall of the top of the installation groove, a detachable cover plate is provided at the bottom of the cross bar, the cover plate is correspondingly arranged with the bottom of the connecting member, a through groove is provided on the installation groove, and at least part of the rolling member passes through the through groove and is higher than the end face of the cross bar.

[0014] The cover plate is connected to the cross bar by screws.

[0015] The housing includes a top cover, arc extinguishing grid plates are provided on the inner wall of the top cover, the bottom of the arc extinguishing grid plates is correspondingly arranged with the static contact piece, a through groove is provided on the top cover, and the top of the arc extinguishing grid plates is correspondingly arranged with the through groove.

[0016] A plurality of clamping grooves are provided on the inner wall of the top cover, and the arc extinguishing grid plates are in clamping fit with the clamping grooves.

[0017] The beneficial effects of the present invention are: The present invention provides a contactor with a rolling contact support for the contact. When the contact support moves, it rolls and cooperates with the housing through the rolling member, reducing the friction force, thereby reducing the pull-in voltage of the product. Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention.

[0019] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the present invention.

[0020] Figure 3 It is a partial explosion schematic diagram of an embodiment of the present invention.

[0021] Figure 4 It is a three-dimensional schematic diagram of the top cover of an embodiment of the present invention.

[0022] Figure 5 It is a partial three-dimensional schematic diagram of an embodiment of the present invention.

[0023] Figure 6 It is a partial three-dimensional schematic diagram of the housing of an embodiment of the present invention. Detailed Description of the Embodiment

[0024] The following further describes the present invention with reference to the drawings: AsFigures 1-3 As shown, a contactor with a rolling - fit contact support includes a housing 1. Inside the housing, a moving contact piece 2 and a static contact piece 3 are provided. Inside the housing, there is also a contact support 4 with a moving fit. The moving contact piece is installed on the contact support. The contact support drives the moving contact piece to make electrical contact or electrical disconnection with the static contact piece under the action of a separating and combining device 5. A rolling element 6 is provided on the contact support and / or the housing. When the contact support moves, it rolls with the housing through the rolling element.

[0025] First, the rolling element can be a roller, a ball, etc. Second, the rolling element can be set on the contact support, or on the housing, or on both. The separating and combining device is prior art. Specifically, the separating and combining device includes a coil, a static iron core, a moving iron core and a return spring. A coil is arranged inside the housing. The coil current generates a magnetic field, and the generated magnetic field makes the static iron core 91 generate an electromagnetic attraction to attract the moving iron core 92. The moving iron core is arranged on the contact support to drive the contact support to move, and its reset of the moving iron core can be realized through the return spring. The present invention provides a contactor with a rolling - fit contact support. When the contact support moves, it rolls with the housing through the rolling element, reducing the friction force, thereby reducing the pull - in voltage of the product.

[0026] In this embodiment, as Figure 6 shown, the rolling element is arranged on the contact support, and a rolling groove 11 for rolling - fit with the rolling element is provided on the inner wall of the housing. As a preferred solution, setting the rolling element on the contact support is convenient for installation.

[0027] In this embodiment, as Figure 3 shown, a cross - bar 41 is provided at the bottom of the contact support. The rolling elements are provided on the front and rear end faces of at least one end of the cross - bar. The front and rear rolling elements roll - fit with the front and rear inner walls of the rolling groove. Further, the rolling elements are provided on the front and rear sides of both ends of the cross - bar. The front and rear rolling elements roll - fit with the front and rear inner walls of the rolling groove, and play a role of limiting and guiding, preventing the contact support from swinging.

[0028] In this embodiment, as Figure 3 shown, an installation groove 411 is provided on the cross - bar. The rolling element is installed in the installation groove through a connecting piece 42 that is detachably connected to the installation groove. It is convenient for disassembly and assembly. The connecting piece can be connected to the installation groove by snap - fit or screw connection. First, the rolling element is installed on the connecting piece, and then the whole connecting piece is installed in the installation groove.

[0029] In this embodiment, as Figure 3As shown, the connecting member includes a main board 421. Side boards 422 are provided on both sides of the main board. A rotating shaft 423 is provided between the side boards. The rolling member is sleeved outside the rotating shaft. Grooves are provided on the side boards. The two ends of the rotating shaft are snapped into the grooves to complete the installation. The structure is simple and the installation is convenient.

[0030] In this embodiment, as Figure 3 shown, the connecting member is provided in the installation groove. The top of the connecting member contacts the inner wall of the top of the installation groove. A cover plate 44 is detachably connected to the bottom of the crossbar. The cover plate is correspondingly arranged with the bottom of the connecting member. A through groove is provided on the installation groove. The rolling member passes through the through groove and at least partially protrudes above the end face of the crossbar. On the one hand, the cover plate can be used to fix the moving iron core, and on the other hand, it can prevent the connecting member from falling out. The structure is simple and easy to use.

[0031] In this embodiment, the cover plate is connected to the crossbar by screws. The disassembly and assembly are convenient, which is a preferred solution.

[0032] In this embodiment, as Figure 1 and 5 shown, the housing includes a top cover 7. An arc extinguishing grid 71 is provided on the inner wall of the top cover. The bottom of the arc extinguishing grid is correspondingly arranged with the static contact piece. A through groove 72 is provided on the top cover. The top of the arc extinguishing grid is correspondingly arranged with the through groove. It is used for arc extinguishing and guiding the arc out of the housing.

[0033] In this embodiment, as Figure 4 shown, a plurality of clamping grooves 73 are provided on the inner wall of the top cover. The arc extinguishing grid is clamped and matched with the clamping grooves. The installation is convenient.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more unless otherwise specifically defined.

[0036] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A contactor with a rolling contact support, comprising a housing (1), wherein a movable contact piece (2) and a stationary contact piece (3) are provided in the housing, wherein a movable contact support (4) is further provided in the housing, wherein the movable contact piece is mounted on the contact support, and wherein: The contact support drives the movable contact piece and the static contact piece to electrically contact or electrically disconnect under the action of the opening and closing device (5). The contact support and / or the housing are provided with a rolling element (6), and the contact support rolls with the housing through the rolling element during movement to reduce friction; A cross arm (41) is provided at the bottom of the contact support, and a mounting groove (411) is provided on the cross arm. The rolling element is installed in the mounting groove via a connecting element (42) detachably connected to the mounting groove.

2. A contactor with rolling-fit contact support according to claim 1, characterized in that: The rolling element is arranged on the contact support, and the inner wall of the housing is provided with a rolling groove (11) that is in rolling engagement with the rolling element.

3. A contactor with rolling-fit contact support according to claim 2, characterized in that: The front and rear end surfaces of at least one end of the cross arm are both provided with the rolling elements, and the front and rear rolling elements are in rolling engagement with the front and rear inner walls of the rolling groove.

4. A contactor with rolling-fit contact support according to claim 1, characterized in that: The connecting member comprises a main board (421), side boards (422) are provided on both sides of the main board, a rotating shaft (423) is provided between the side boards, and the rolling member is sleeved outside the rotating shaft.

5. A contactor with rolling-fit contact support according to claim 4, characterized in that: The connecting member is arranged in the installation groove, the top of the connecting member contacts the inner wall of the top of the installation groove, the bottom of the cross arm is provided with a detachably connected cover plate (44), the cover plate is arranged corresponding to the bottom of the connecting member, and a connecting through groove is provided on the installation groove, and the rolling member passes through the through groove and is at least partially higher than the end face of the cross arm.

6. A contactor with rolling-fit contact support according to claim 5, characterized in that: The cover plate is connected to the cross arm through screws.

7. A contactor with rolling-fit contact support according to claim 1, characterized in that: The housing comprises a top cover (7), an inner wall of the top cover is provided with an arc extinguishing grid (71), the bottom of the arc extinguishing grid is arranged corresponding to the static contact piece, the top cover is provided with a through groove (72), and the top of the arc extinguishing grid is arranged corresponding to the through groove.

8. A contactor with rolling-fit contact support according to claim 7, characterized in that: The inner wall of the top cover is provided with a plurality of snap-fit grooves (73), and the arc-extinguishing grid pieces are snap-fitted with the snap-fit grooves.

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