Static contact sheet for static contact seat

Abstract

The utility model provides a static contact sheet for a static contact seat, which comprises a body and a stud installation limiting piece fixed at the tail end of the body, and the body comprises a fixing section, an arc-shaped connecting section and a clamping section which are connected in sequence; the tail end of the fixed section is connected with the outer side of a stud installation limiting piece, an auxiliary stud installation limiting piece is fixedly connected to the lower portion of the stud installation limiting piece, and the rear side of the auxiliary stud installation limiting piece is connected with the rear side of the stud installation limiting piece through a vertical connecting plate; the front side of the auxiliary stud installation limiting piece is connected with the front side of the stud installation limiting piece through a connecting piece. An elastic sheet is arranged on the outer side of the fixed section in parallel, and the rear end of the elastic sheet is fixedly connected with the connecting sheet; the front end of the elastic piece is a wavy elastic part, and the convex face, facing the arc, of the wavy elastic part abuts against the side face of the front end of the fixing section. The stress stability and the position stability of the static contact piece are improved, the integrity of the static contact piece body is ensured, the service life of the static contact piece body is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transit, and particularly relates to a static contact piece for a static contact seat. Background Art

[0002] The static contact group in the existing switch machine contact group mainly consists of a static contact seat, a plurality of terminal bolts (terminal posts), and a plurality of contact pieces (static contact pieces) installed in the installation grooves. There is a raised long isolation strip, namely an insulating isolation edge, between two installation grooves. In practical applications, when the moving contact hits or is pulled out from a group of static contact pieces at a high frequency, it is required that this group of static contact pieces has high reliability, that is, it has 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 moving contact piece, with smooth force, especially to avoid the deflection of the static contact piece around the terminal stud caused by the high-frequency hitting or pulling out of the moving contact from the static contact group, which may cause the relative two static contact pieces in the static contact group, that is, a left static contact piece and a right static contact piece located on the left and right sides of an insulating isolation edge, to have a reset deviation caused by long-term accumulation or a certain severe vibration, resulting in an increase in the distance or a deviation in the position center between the relative left and right static contact pieces. This will increase the resistance or friction of the moving contact post when it is hit or pulled out again, further enhancing the wear of the contact point, causing unstable operation of the contact point, and even damage, especially causing circuit flash or arc, which will inevitably pose a serious safety hazard.

[0004] Therefore, the Chinese utility model patent, that is, the utility model patent with the patent number 201220215425.0, discloses a constant-pressure static contact seat, which mainly realizes the elastic support for the static contact piece through a torsion spring and a compression spring to ensure the stability of the contact pressure between the static contact piece and the moving contact when it is hit or pulled out. However, this solution has problems such as spring rust and flash. In particular, the torsion arm of the torsion spring scratches and deforms the pressure on the static contact piece, resulting in a depression at the stressed part of the static contact piece and high-frequency overload pressure, which greatly affects the service life and electrical conductivity of the static contact piece, increasing the maintenance and replacement costs. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems of unstable operation, easy wear, and serious accidents caused by the position deviation of the existing static contact piece due to high-frequency stress.

[0006] To achieve the above purpose, the utility model provides a static contact piece for a static contact seat, which includes a body and a stud installation limiting member fixed at the tail end of the body. The body includes a fixed section, an arc connection section, and a clamping section connected in sequence;

[0007] The tail end of the fixed section is fixedly connected to the outer side of the stud installation limiting member;

[0008] A secondary stud mounting limit member is further provided below the stud mounting limit member, and the rear side of the secondary stud mounting limit member is fixedly connected to the rear side of the stud mounting limit member through a vertical connecting plate;

[0009] The front side of the secondary stud mounting limit member is fixedly connected to the front side of the stud mounting limit member through a connecting piece;

[0010] A shrapnel is placed parallel to the outside of the fixed section, and the rear end of the shrapnel is fixedly connected to the connecting piece;

[0011] The front end of the shrapnel is a wavy elastic part, and the wavy elastic part abuts against the front side surface of the front end of the fixed section toward the arc convex surface.

[0012] The beneficial effects of the utility model are as follows: the stress stability and position stability of the static contact piece are improved, which is beneficial to ensuring the integrity of the static contact piece body, beneficial to the extension of its service life, and reducing the maintenance cost.

[0013] The following will further describe the present utility model in detail with reference to the drawings. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of a static contact piece for a static contact seat.

[0015] Description of the reference numerals: 1, stud mounting limit member; 2, fixed section; 3, arc connecting section; 4, clamping section; 5, secondary stud mounting limit member; 6, vertical connecting plate; 7, connecting piece; 8, shrapnel; 9, wavy elastic part; 10, disc spring or helical spring; 11, arched shrapnel part. Detailed Embodiment

[0016] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined purpose; the following will describe in detail the specific implementation manner, structural features and their effects of the present utility model with reference to the drawings and embodiments.

[0017] This embodiment provides a Figure 1The static contact piece for the static contact base shown includes a main body and a stud mounting limit member 1 fixed to the tail end of the main body. Among them, the main body includes a fixed section 2, an arc connecting section 3, and a clamping section 4 connected in sequence; the tail end of the fixed section 2 is fixedly connected to the outer side of the stud mounting limit member 1; a pair of stud mounting limit members 5 is further provided below the stud mounting limit member 1, and the rear side of the pair of stud mounting limit members 5 is fixedly connected to the rear side of the stud mounting limit member 1 through a vertical connecting plate 6; the front side of the pair of stud mounting limit members 5 is fixedly connected to the front side of the stud mounting limit member 1 through a connecting piece 7; a spring piece 8 is placed parallel to the outer side of the fixed section 2, and the rear end of the spring piece 8 is fixedly connected to the connecting piece 7; the front end of the spring piece 8 is a wavy elastic part 9, and the wavy elastic part 9 faces the arc convex surface and abuts against the front side surface of the fixed section 2.

[0018] In this embodiment, the additional pair of stud mounting limit members 5 further improves the stability of the fixation of the static contact piece. More importantly, a spring piece 8 is added on this basis, especially the wavy elastic part 9 at its front end. By means of the arc convex surface facing the fixed section 2, it provides elastic support for the fixed section 2. Compared with the torsion spring in the prior art, since the elastic support point is located at the front end of the fixed section 2, it generates a reaction force almost in the same straight line against the outward extrusion force received by the static contact piece, which can provide a more powerful and stable elastic support for the static contact piece, avoiding the torsion effect of the torsion arm of the torsion spring in the prior art, effectively avoiding the torsional deformation of the static contact piece body, and helping to ensure the stability of the shape and performance of the static contact piece body. More importantly, since an almost straight reaction force is generated, the body of the static contact piece hardly undergoes position offset, that is, it can completely return to the initial position after the external force is withdrawn, without causing the offset of the central position of the contact piece group. Thus, the relative stability of the contact position with the moving contact and the stability of the force received are ensured, which is very beneficial to the stability of the operation of the entire contact. In addition, since it is surface contact, rather than the point or line contact of the torsion spring, it realizes the maximum protection of the contact surface, avoiding the deformation and scratches caused by the concentrated force on the contact surface, and more avoiding the electric spark caused by the instantaneous sliding of the torsion spring due to the deformation of the contact surface, which is beneficial to ensuring the electrical safety of the operation. Moreover, the internal and external forces of the static contact piece act perpendicular to each other, rather than the torsion arm. Therefore, the spring piece is linearly and vertically extruded, and it will not cause its high-frequency torsion and flash break.

[0019] In order to further improve the reliability of the work, on the basis of the foregoing embodiment, in this embodiment, a disc spring or a helical spring 10 is provided at the arc-shaped concave surface of the wavy elastic part 9 facing away from the fixed section 2, further enhancing the elastic support for the wavy elastic part 9, realizing double-sided elastic support, further improving the elastic support for the static contact piece, better ensuring the stability of the internal and external forces when the static contact piece is squeezed by the moving contact, and due to the almost perpendicular interaction of the internal and external forces, effectively avoiding the minimization of the sway amplitude when the static contact piece is stressed or the external force is withdrawn, which is beneficial to the stability and reliability of the working positions of each component.

[0020] Finally, in this embodiment, an arched elastic piece part 11 with the arc-shaped convex surface facing away from the fixed section 2 is provided between the rear end of the elastic piece 8 and the wavy elastic part 9, so as to generate a continuous elastic pressure on the wavy elastic part 9 towards the fixed section 2. With the limitation of the groove width of the installation groove, the position deviation caused by the force is limited, further improving the stability of the elastic support of the elastic piece for the fixed section 2, which is beneficial to maintaining the stability of the central position of the static contact piece group, thus effectively avoiding the changes in the force application position and direction of the moving contact and the static contact piece caused by the change of the central position, being beneficial to ensuring the stability of the interaction between the static contact piece and the moving contact, and also facilitating the later maintenance.

[0021] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments; it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs; without departing from the concept of the present utility model; several simple deductions or replacements can still be made; all of which should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A static contact piece for a static contact seat, comprising a body and a stud mounting stopper (1) fixed to the rear end of the body, characterized in that: The body comprises a fixing section (2), an arc-shaped connecting section (3) and a clamping section (4) which are connected in sequence; The rear end of the fixing section (2) is fixedly connected to the outer side of the stud installation stopper (1); A secondary stud installation limiting member (5) is also provided below the stud installation limiting member (1), and the rear side of the secondary stud installation limiting member (5) is fixedly connected to the rear side of the stud installation limiting member (1) via a vertical connecting plate (6); The front side of the auxiliary stud installation stopper (5) is fixedly connected to the front side of the stud installation stopper (1) via a connecting piece (7); A spring sheet (8) is placed parallel to the outside of the fixed section (2), and the rear end of the spring sheet (8) is fixedly connected to the connecting sheet (7); The front end of the elastic sheet (8) is a wave-shaped elastic portion (9), and the arc-shaped convex surface of the wave-shaped elastic portion (9) abuts against the front end side surface of the fixing section (2).

2. The stationary contact piece for the stationary contact seat according to claim 1, characterized in that: A disc spring or a coil spring (10) is provided at the arc-shaped concave surface of the wavy elastic portion (9) facing away from the fixed section (2).

3. The stationary contact piece for a stationary contact seat according to claim 1 or 2, characterized in that: Between the rear end of the spring sheet (8) and the wavy elastic portion (9) is an arched spring sheet portion (11) with an arc-shaped convex surface facing away from the fixed section (2).

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