Contact group structure with uniform contact pressure

Abstract

The utility model discloses a contact group structure with uniform contact pressure, which relates to the technical field of relays and comprises an insulating block, and a pre-compression component is arranged on the top surface of the insulating block. According to the utility model, through the arrangement of the vertical support, the insulating block, the armature I, the armature II, the limiting groove and the overtravel spring, the movable contact piece can be riveted and positioned by double planes through the armature I and the armature II, and then the position of the movable contact piece is limited through the vertical support, so that the movable contact piece is further limited. In the middle part of the structure, the over-travel spring is used for respectively abutting against the limiting groove and the bottom surface of the movable contact piece to provide pre-pressure, so that the movable contact piece is ensured to be in a plane after being installed, the over-travel spring can be used for enabling the left side and the right side to be stressed uniformly, the contact pressure is ensured to be consistent, and the stability of the electric appliance performance of the relay is improved; riveting and falling prevention can be achieved through fixing of the split rivets and the convex ribs, the structure is exquisite, automatic production is easy to achieve, and assembling and machining are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a contact group structure with uniform contact pressure. Background Art

[0002] In recent years, with the rapid development of new energy vehicles, photovoltaic new energy, and energy storage industries, the demand for high-voltage DC relays has become increasingly higher; the most prominent feature of high-voltage DC relays is that they can quickly extinguish arcs between contacts and reduce damage to relay contacts by arcs; the contact reliability and consistency of the contact group are directly related to the stability of the relay electrical performance.

[0003] When the existing relay is not working, the moving contact is disconnected from the two static contacts on the left and right, and the two static contacts are in an open circuit state. When the relay is working, the moving contact moves up and contacts the static contacts on both sides at the same time; the static contacts on both sides are connected through the moving contact to realize the conduction of the circuit. However, when a moving contact is used to conduct or disconnect the two static contacts at the same time, this contact structure disconnects both sides at the same time when disconnecting, which is equivalent to two sections of contact opening distance in the circuit. The larger the contact opening distance, the shorter the arc duration; however, this will extend the synchronization problem of the left and right contact groups. If the moving contact is not installed flat, one side is high and the other side is low, then there will be a problem that the contact pressure on one side is large and the contact pressure on the other side is small, so it needs to be improved. Utility Model Content

[0004] Technical issues solved

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a contact group structure with uniform contact pressure.

[0006] Technical Solution

[0007] To achieve the above object, the utility model provides the following technical solutions: a contact group structure with uniform contact pressure, comprising an insulating block, wherein the top surface of the insulating block is provided with a pre-pressure component;

[0008] A planar bracket is injection-molded on the top surface of the insulating block, and a push rod is injection-molded on the bottom surface of the insulating block.

[0009] As mentioned above, the front inner wall and the back inner wall of the insulating block are both fixed with ribs by injection molding, and the ribs are connected to the limiting components.

[0010] As mentioned above, the pre-pressure assembly includes a limit groove and an overtravel spring. The top surface of the insulating block is provided with a limit groove, and the limit groove is an annular groove. One end of the overtravel spring is clamped on the inner wall of the limit groove, and a moving contact assembly is provided at the top of the overtravel spring.

[0011] As mentioned above, the moving contact assembly includes an armature 2 and a moving contact piece, and the two ends of the bottom surface of the moving contact piece are respectively fixedly connected with convex buds, and the bottom surface of the armature 2 is penetrated with a connecting hole. The armature 2 is riveted to the convex bud of the moving contact piece through the connecting hole, and the two ends of the bottom surface of the moving contact piece are riveted with the armature 2, and the inner wall of the circular groove formed between the two armatures 2 on the bottom surface of the moving contact piece forms a limiting fit with the top end of the overtravel spring.

[0012] As mentioned above, the limit assembly includes a vertical bracket and an armature 1, the vertical bracket is U-shaped, a connecting hole is penetrated on the top surface of the vertical bracket, a card slot is penetrated on the front and back sides of the vertical bracket, the vertical bracket and the convex rib of the insulating block are fixed by split riveting, the top surface of the armature 1 is fixedly connected with a convex column, and the convex column of the armature 1 is inserted into the connecting hole of the vertical bracket and then riveted.

[0013] Beneficial effects:

[0014] Compared with the prior art, the contact group structure with uniform contact pressure has the following beneficial effects:

[0015] 1. The utility model provides a vertical bracket, an insulating block, an armature 1, an armature 2, a limit groove and an overtravel spring, so that the movable contact piece can be positioned by double-plane riveting through the armature 1 and the armature 2, and then the position of the movable contact piece is limited by the vertical bracket. The middle part of the structure uses an overtravel spring to respectively press against the limit groove and the bottom surface of the movable contact piece to provide pre-pressure, which not only ensures that the movable contact piece is in a plane after installation, but also uses the overtravel spring to make the left and right sides evenly stressed, ensuring that the contact pressure is consistent.

[0016] 2. The utility model provides a vertical bracket, an insulating block and a convex rib, so that the vertical bracket is U-shaped and can be fixed by split rivets and convex ribs to achieve riveting and anti-slip, and has a delicate structure, is easy to realize automated production, and is conducive to assembly and processing.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the insulating block of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the vertical bracket of the utility model;

[0021] Figure 4 This is a bottom view of the vertical support structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the movable contact piece of the utility model.

[0023] In the figure: 1. Insulating block; 2. Armature 1; 3. Armature 2; 4. Vertical bracket; 5. Moving contact piece; 6. Overtravel spring; 8. Push rod; 9. Limiting groove; 10. Convex rib. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-5 As shown, the utility model provides a technical solution: a contact group structure with uniform contact pressure, comprising an insulating block 1, and a pre-pressure component is arranged on the top surface of the insulating block 1;

[0026] A planar bracket is injection-molded on the top surface of the insulating block 1 , and a push rod 8 is injection-molded on the bottom surface of the insulating block 1 .

[0027] According to the overall structure of the device, the moving contact piece 5 is riveted to the two armatures 2 3 respectively, the armature 1 2 is riveted to the vertical bracket 4, the lower end of the overtravel spring 6 is clamped in the limit groove 9, the upper end of the overtravel spring 6 is clamped in the circular groove formed between the armatures 2 3, and against the bottom surface of the moving contact piece 5, and then the vertical bracket 4 and the convex rib 10 are riveted to complete the assembly, and then it is installed in the relay. When the driving push rod 8 moves, the insulating block 1 and the insulating block 1 move together, so that the moving contact piece 5 moves, so that the moving contact piece 5 can be connected to the static contact piece in the relay, and when moving, the moving contact piece 5 is positioned by double-plane riveting due to the armature 1 2 and the armature 2 3, and the position of the moving contact piece 5 is limited by the vertical bracket 4. At the same time, the middle part of the structure uses the overtravel spring 6 to respectively against the limit groove 9 and the bottom surface of the moving contact piece 5 to provide pre-pressure, so that the moving contact piece 5 is evenly stressed on the left and right sides to ensure consistent contact pressure.

[0028] like Figure 1 As shown, the front inner wall and the back inner wall of the insulating block 1 are both fixed with convex ribs 10 by injection molding, and the convex ribs 10 are connected to the limiting components.

[0029] The insulating block 1 is fixed to the vertical bracket 4 by riveting through the provided convex rib 10 .

[0030] like Figure 2-5 As shown, the pre-pressure assembly includes a limit groove 9 and an overtravel spring 6. The top surface of the insulating block 1 is provided with a limit groove 9, and the limit groove 9 is a kind of annular groove. One end of the overtravel spring 6 is clamped on the inner wall of the limit groove 9. The top of the overtravel spring 6 is provided with a moving contact assembly, and the moving contact assembly includes an armature 2 3 and a moving contact piece 5. The two ends of the bottom surface of the moving contact piece 5 are respectively fixedly connected with convex buds, and the bottom surface of the armature 2 3 is penetrated with a connecting hole. The armature 2 3 is riveted with the convex bud of the moving contact piece 5 through the connecting hole, and the two ends of the bottom surface of the moving contact piece 5 Both are riveted with armature 2 3, the inner wall of the circular groove formed between the two armature 2 3 on the bottom surface of the moving contact piece 5 forms a limit fit with the top end of the overtravel spring 6, the limit assembly includes a vertical bracket 4 and an armature 2, the vertical bracket 4 is U-shaped, the top surface of the vertical bracket 4 is penetrated with a connecting hole, the front and back surfaces of the vertical bracket 4 are penetrated with a card slot, the vertical bracket 4 is fixed to the convex rib 10 of the insulating block 1 by split riveting, the top surface of the armature 2 is fixedly connected with a convex column, the convex column of the armature 2 is inserted into the connecting hole of the vertical bracket 4 and then riveted.

[0031] By setting the limit groove 9, overtravel spring 6, armature 2 3, moving contact piece 5, vertical bracket 4 and armature 1 2, when the driving push rod 8 moves, the insulating block 1 and the insulating block 1 will move together, so that the moving contact piece 5 moves, so that the moving contact piece 5 can be connected with the static contact piece in the relay, and when moving, the moving contact piece 5 is positioned by double-plane riveting due to the armature 1 2 and the armature 2 3, and the position of the moving contact piece 5 is limited by the vertical bracket 4. At the same time, the middle part of the structure is respectively against the limit groove 9 and the bottom surface of the moving contact piece 5 through the overtravel spring 6 to provide pre-pressure, so that the moving contact piece 5 is evenly stressed on the left and right sides to ensure consistent contact pressure.

[0032] Working principle: the moving contact piece 5 is riveted to the two armatures 2 3 respectively, the armature 1 2 is riveted to the vertical bracket 4, the lower end of the overtravel spring 6 is clamped in the limit groove 9, the upper end of the overtravel spring 6 is clamped in the circular groove formed between the armatures 2 3, and it is against the bottom surface of the moving contact piece 5, and then the vertical bracket 4 is riveted through the clamping groove and the convex rib 10 to complete the assembly, and then it is installed in the relay. When the driving push rod 8 moves, the insulating block 1 and the insulating block 1 will move together, so that the moving contact piece 5 moves, so that the moving contact piece 5 can be connected to the static contact piece in the relay, and when moving, the moving contact piece 5 is positioned by double-plane riveting due to the armature 1 2 and the armature 2 3, and the position of the moving contact piece 5 is limited by the vertical bracket 4. At the same time, the middle part of the structure uses the overtravel spring 6 to respectively press against the limit groove 9 and the bottom surface of the moving contact piece 5 to provide pre-pressure, so that the moving contact piece 5 is evenly stressed on the left and right sides.

[0033] It should be noted that, in this article, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected", and "connected" should be understood in a broad sense. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "connected" can be a direct connection, an indirect connection through an intermediate medium, or a connection between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A contact group structure with uniform contact pressure, comprising an insulating block (1), characterized in that: The top surface of the insulating block (1) is provided with a pre-pressure component; A planar bracket is injection-molded on the top surface of the insulating block (1), and a push rod (8) is injection-molded on the bottom surface of the insulating block (1).

2. A contact group structure with uniform contact pressure according to claim 1, characterized in that: The front inner wall and the back inner wall of the insulating block (1) are both injection-molded with convex ribs (10) fixed thereto, and the convex ribs (10) are connected to limit position components.

3. The contact group structure with uniform contact pressure according to claim 1, characterized in that: The pre-pressure assembly comprises a limit groove (9) and an over-travel spring (6); the top surface of the insulating block (1) is provided with a limit groove (9); the limit groove (9) is an annular groove; one end of the over-travel spring (6) is clamped on the inner wall of the limit groove (9); and a moving contact assembly is arranged at the top of the over-travel spring (6).

4. A contact group structure with uniform contact pressure according to claim 3, characterized in that: The movable contact assembly comprises an armature 2 (3) and a movable contact piece (5), the two ends of the bottom surface of the movable contact piece (5) are respectively fixedly connected with convex buds, the bottom surface of the armature 2 (3) is penetrated with a connecting hole, the armature 2 (3) is riveted to the convex bud of the movable contact piece (5) through the connecting hole, and the two ends of the bottom surface of the movable contact piece (5) are riveted with the armature 2 (3), and the inner wall of the circular groove formed between the two armatures 2 (3) on the bottom surface of the movable contact piece (5) forms a limit fit with the top end of the overtravel spring (6).

5. The contact group structure with uniform contact pressure according to claim 2, characterized in that: The limit assembly comprises a vertical bracket (4) and an armature (2); the vertical bracket (4) is U-shaped; a connection hole is provided through the top surface of the vertical bracket (4); a clamping slot is provided through the front and back surfaces of the vertical bracket (4); the vertical bracket (4) is fixed to a convex rib (10) of an insulating block (1) by split riveting; a convex column is fixedly connected to the top surface of the armature (2); the convex column of the armature (2) is inserted into the connection hole of the vertical bracket (4) and then riveted.

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