Static contact group

Abstract

The utility model provides a static contact group, which comprises a static contact seat and a mounting groove which is arranged on the static contact seat and is used for mounting a static contact sheet and a reinforcing sheet, and a limiting end part of a mounting section of the reinforcing sheet, which is mounted in the mounting groove, is bent towards the side wall of the mounting groove and is inserted into a limiting groove on the side wall; and an elastic supporting piece is arranged between the limiting end part and the notch side wall at the notch of the mounting groove. According to the utility model, the mutual interference between the static contact sheet and the reinforcing sheet is effectively avoided, especially, the thickness of a conductive part at the wiring stud is greatly reduced, the electrical conductive distance is shortened, the electrical safety is enhanced, and meanwhile, the constant stress support of the static contact sheet is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transportation, and particularly relates to a static contact group. Background Art

[0002] The static contact group in the existing switch machine contact group is mainly composed of a static contact seat, multiple terminal bolts (terminal posts), and multiple contact pieces (static contact pieces) installed in the installation grooves. The middle of the two installation grooves is a raised long isolation strip, namely the insulating isolation ridge. In practical applications, the high frequency of moving contacts being driven in or out of a group of static contact pieces requires that the group of static contact pieces have high reliability, that is, they are required to have high mechanical elasticity and impact resistance to ensure reliable and stable operation.

[0003] In order to enhance the reliable and stable contact between the static contact piece and the dynamic contact piece, the force is stable, especially to avoid the dynamic contact being frequently driven into or pulled out of the static contact group, which causes the static contact piece to deflect around the terminal stud, causing the two opposite static contact pieces in the static contact group, namely a left static contact piece and a right static contact piece located on the left and right sides of an insulating isolation edge, to cause reset deviation caused by accumulated reset over time or a certain violent vibration, resulting in the distance between the relative left and right static contact pieces to become larger or the position center to shift, which will increase the resistance or friction force of the dynamic contact column when it is driven in or pulled out again, further increase the wear of the connection point, cause the contact to work unstable or even damaged, especially cause circuit flash or arc, which is bound to cause serious safety hazards.

[0004] To this end, the Chinese invention patent application with patent application number 202210676656.X discloses a compensated constant pressure dynamic and static contact group, which mainly enhances the elastic support of the static contact plate by adding a constant force compensation contact plate between the static contact plate and the reinforcement plate, thereby making the pressure between the static contact plate and the dynamic contact constant. However, its most obvious defect is that the static contact plate, reinforcement plate and constant force compensation contact plate are all installed on the terminal stud, which undoubtedly increases the effective occupancy of the slot width of the installation slot, and is superimposed on each other, especially on the terminal stud, and is fixed by nuts, which enhances mutual interference and space occupancy, is not conducive to thickness control at the terminal stud, is not conducive to electrical safety, and is easy to increase the creepage height, that is, reduce the creepage distance. Electrical arcs are easily generated during high-frequency operations, leading to major safety hazards. Utility Model Content

[0005] The purpose of the utility model is to provide a static contact group that can effectively increase the creepage distance and achieve constant support for the static contact piece, so as to overcome the problems of mutual interference between components and small electrical safety distance in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides a static contact assembly, comprising a static contact seat, and a mounting groove provided on the static contact seat for mounting a static contact plate and a reinforcing plate. The utility model is characterized in that a limiting end portion of the mounting section of the reinforcing plate mounted in the mounting groove is bent toward a side wall of the mounting groove and inserted into the limiting groove on the side wall.

[0007] An elastic support member is provided between the limiting end portion and a slot side wall at the slot of the installation slot.

[0008] The beneficial effects of the present invention are: effectively avoiding mutual interference between the static contact piece and the reinforcement piece, especially greatly reducing the thickness (height) of the conductive component at the terminal stud, shortening the electrical conduction distance, enhancing electrical safety, and at the same time ensuring constant force support of the static contact piece.

[0009] The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The diagram is a schematic diagram of a single mounting slot structure of a static contact group.

[0011] Figure 2 It is a structural diagram of the limiting groove and the limiting blind hole.

[0012] Figure 3 It is a structural diagram of the limiting end position of the reinforcement plate.

[0013] Figure 4 It is a structural diagram of a vertical spring provided at the end of a coil spring.

[0014] Figure 5 It is a front view of the vertical shrapnel.

[0015] Explanation of the accompanying drawings: 1. Static contact seat; 2. Static contact plate; 3. Reinforcement plate; 4. Mounting groove; 5. Limiting end; 6. Limiting groove; 7. Notch; 8. Notch side wall; 9. Elastic support member; 10. Limiting blind hole; 11. Vertical spring piece; 12. Strip or elliptical portion. DETAILED DESCRIPTION

[0016] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the following is a detailed description of the specific implementation methods, structural features and effects of the present invention in combination with the accompanying drawings and embodiments.

[0017] In order to effectively increase the creepage distance and realize the static contact group of constant support for the static contact piece, so as to overcome the problems of mutual interference between components and small electrical safety distance in the prior art, this embodiment provides a Figure 1 、 2The static contact assembly shown in the figure includes a static contact seat 1, a mounting groove 4 for mounting a static contact piece 2 and a reinforcing piece 3 on the static contact seat 1. The difference from the prior art is that the limiting end 5 of the mounting section of the reinforcing piece 3 mounted in the mounting groove 4 is bent toward the side wall of the mounting groove 4 and inserted into the mounting groove 4. Figure 3 An elastic support member 9 is provided in the limiting groove 6 on the side wall shown; between the limiting end portion 5 and the groove side wall 8 at the groove 7 of the mounting groove 4.

[0018] This embodiment shortens the length of the reinforcing plate 3 placed in the installation groove 4 and fixes it in the limiting groove 6 on the side wall of the installation groove 4, thereby fixing the inner end of the reinforcing plate 3 and cooperating with the installation groove to fix the overall position of the reinforcing plate 3, ensuring that the reinforcing plate 3 supports the static contact plate 2. At the same time, the elastic support member 9 provided between the side wall 8 of the slot and the reinforcing plate 3 further enhances the force support for the static contact plate 2, so that the static contact plate 2 can provide elastic support in the range of 6 to 12 Newtons, ensuring the constancy of the force between the static contact plate 2 and the dynamic contact column. More importantly, the reinforcing plate 3 and the elastic support 9 no longer need to be fixed by the limiting means of the terminal stud. Compared with the prior art, the conductive height at the terminal stud is greatly reduced, the electrical conductive distance is increased, and the electrical safety is enhanced.

[0019] The elastic support member 9 here can be a corrugated spring, a disc spring or a coil spring. When it is a corrugated spring, it is fixed to the outer side wall of the limiting end 5 and can be welded or riveted, or can be integrally cast.

[0020] When the elastic support member 9 is a disc spring, it can be fixed on the slot side wall 8, such as partially inserted or embedded in the slot side wall 8.

[0021] When the elastic support member 9 is a coil spring, its limit is Figure 2 The axis of the slot side wall 8 is perpendicular to the limiting blind hole 10 of the reinforcing plate 3. At this time, in order to facilitate the installation of the static contact plate 2 and the reinforcing plate 3, Figure 4 The end of the coil spring facing the limit end 5 is welded with a vertical spring piece 11, and the top of the vertical spring piece 11 facing the static contact seat 1 is provided with a Figure 5The strip or elliptical portion 12 is shown extending vertically upward, with the top of the strip or elliptical portion 12 located between the top of the limiting end portion 5 and the top of the side wall of the mounting slot 4. Thus, when removing or installing the static contact piece 2 or the reinforcing piece 3, a tool such as a flat-bladed screwdriver or a piece of iron can be used to push the vertical spring clip 11 toward the side wall of the mounting slot 4 to compress the coil spring, thereby creating sufficient space for removing or installing the static contact piece 2 or the reinforcing piece 3, facilitating removal or installation. Furthermore, the vertical spring clip 11 itself increases the effective contact pressure area with the reinforcing piece 3, improving the stability of the force applied and preventing the coil spring from scratching the reinforcing piece 3 due to vibration during actual operation, which could affect the service life and the stability of the elastic support.

[0022] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments; the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, they can make several simple deductions or substitutions, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A static contact assembly, comprising a static contact seat (1), a mounting groove (4) provided on the static contact seat (1) for mounting a static contact piece (2) and a reinforcing piece (3), characterized in that: The limiting end portion (5) of the installation section of the reinforcing plate (3) installed in the installation groove (4) is bent toward the side wall of the installation groove (4) and inserted into the limiting groove (6) on the side wall; An elastic support member (9) is provided between the limiting end portion (5) and a slot side wall (8) at the slot (7) of the installation slot (4).

2. The static contact assembly according to claim 1, characterized in that: The elastic support member (9) is a wave spring, a disc spring or a coil spring.

3. The static contact assembly according to claim 2, characterized in that: The corrugated spring piece is fixed on the outer side wall of the limiting end portion (5).

4. The static contact assembly according to claim 2, characterized in that: The disc spring is fixed on the slot side wall (8).

5. The static contact assembly according to claim 2, characterized in that: The axis of the coil spring limited on the side wall (8) of the slot is perpendicular to the limiting blind hole (10) of the reinforcing plate (3).

6. The static contact assembly according to claim 5, characterized in that: A vertical spring (11) is welded to one end of the coil spring facing the limiting end (5), and a strip or elliptical portion (12) extending vertically upward is provided on the top of the vertical spring (11) facing the static contact seat (1), and the top of the strip or elliptical portion (12) is located between the top of the limiting end (5) and the top of the side wall of the mounting groove (4).

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