Integrated wave spring constant pressure contact group for railway switch machine

Abstract

The utility model discloses an integrated wave spring constant pressure contact group for a railway switch machine, which comprises a base body seat, a transparent upper cover and a movable contact group, and three groups of symmetrically distributed contact points are respectively arranged in a left area and a right area of the base body seat. According to the utility model, elastic support is provided for the contact sheet through the wave reed, the decline rate of contact pressure is substantially slowed down, and pressure stability in long-term use is ensured; meanwhile, the movable contact adopts a split type design and is matched with a gap of the contact sheet to realize electrical redundancy connection, so that the reliability of signal transmission is improved. Compared with the traditional design that the rib-type contact group is driven into the static contact from the outside, the utility model adopts the mode of driving into the static contact from the inside to the outside, thereby greatly reducing the risk of impact deformation of the contact sheet, and effectively improving the electrical contact performance of the moving contact and the contact sheet. In addition, the performance states of the contact group are consistent before and after the contact group is installed in the switch machine, so that most maintenance work can be transferred to offline completion, the field operation time is obviously reduced, and the maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway turnout switch machine technical field especially relates to a railway switch machine integral wave spring constant pressure contact group. BACKGROUND

[0002] The current production and use of the rib type contact group was designed in the 1970s. Since April 1997, the railway has carried out six consecutive speed increases. In 2008, high-speed railways have reached a certain scale. Since 2015, high-speed railways have entered a new journey. The scale is ahead of time, the management is strengthened, and the requirements for equipment are higher.

[0003] The current railway switch machine uses an open and dispersed structure. The moving contact and the static contact are installed and combined in two parts. There are high-frequency faults such as retaining ring falling off, cotter breaking, contact piece eccentric wear, poor contact, short circuit, contamination, and low insulation resistance. Although improvements have been made in materials, processing, and quality control, the existing contact group still cannot achieve a design service life of 1 million times. Long-term "sick operation" leads to heavy maintenance tasks for the electrical section, frequent repairs consume a lot of manpower and financial resources, and seriously affect the normal operation of trains. The fundamental reason lies in the structural design defects of the contact group: as an outdoor device, the switch machine is exposed to high temperature and humidity, severe cold, salt spray, and other harsh environments for a long time, which leads to deterioration of the contact surface, increase of the contact resistance, and decrease of the insulation performance. This is the fatal flaw of the open contact group.

[0004] At the same time, according to the patent application number: CN201921328187.2, CN201921448088.8, a one-piece sealed contact group for railways and a one-piece redundant contact group for railway switch machines are proposed. The pressure of the contact piece is only provided by the deformation of the copper alloy sheet material itself, and no other elastic structure is provided for auxiliary support. Therefore, the contact pressure may deviate over time, and therefore a one-piece wave spring constant pressure contact group for railway switch machines is needed to address the above problems. Utility model content

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the wave spring sheet provides elastic support for the contact piece, significantly slows down the decline rate of the contact pressure, ensures stable pressure during long-term use, and avoids the possibility of deviation of the contact pressure over time.

[0007] (II) Technical solutions

[0008] In order to achieve the above object, the utility model provides the following technical scheme: including base seat, transparent upper cover, dynamic contact group, the left and right two areas of base seat each is equipped with three groups of symmetrical distribution contact point position, every group contact point position includes contact piece and wave spring piece, the transparent upper cover covers base seat top and is fixed through the limiting structure, the dynamic contact group is assembled in the clamping groove of base seat, the dynamic contact group includes U type support, drive shaft and the dynamic contact of installing in drive shaft both ends, the dynamic contact is divided into upper and lower two parts, the contact piece and wave spring piece are fixed in base seat through fastener, and wave spring piece and contact piece are pasted to provide elastic support.

[0009] Preferably, the wave spring piece and the contact piece are installed in close contact, and the thickness and the elastic modulus of the wave spring piece are configured to provide a preset elastic support force for the contact piece.

[0010] Preferably, the moving path of the dynamic contact is jointly defined by the inner wall of the clamping groove of the base seat and the guide surface of the U-shaped support, and the movement direction of the dynamic contact extends parallel to the fixed side to the free side of the contact piece.

[0011] Preferably, the upper and lower parts of the dynamic contact are connected to the drive shaft through independent rotating shafts, and the contact piece is provided with a through gap in the width direction.

[0012] Preferably, the base seat and the transparent upper cover are made of flame-retardant engineering plastics, and the edge of the transparent upper cover is provided with a sealing structure.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides an integrated wave spring constant pressure contact group for a railway switch machine, which has the following beneficial effects:

[0015] The utility model provides elastic support for the contact piece through the wave spring piece, significantly slows down the decline rate of contact pressure, and ensures stable pressure in long-term use; at the same time, the dynamic contact adopts a split type design, realizes electrical redundancy connection in cooperation with the gap of the contact piece, and improves the reliability of signal transmission. Compared with the design of the traditional rib type contact group, the utility model adopts the mode of punching from inside to outside, greatly reduces the risk of impact deformation of the contact piece, effectively improves the electrical contact performance of the dynamic contact and the contact piece. In addition, the performance state of the contact group is consistent before and after being loaded into the switch machine, so that most of the maintenance work can be transferred to offline completion, significantly reduces the on-site operation time, and improves the maintenance efficiency. ACCURACY OF DRAWINGS

[0016] Fig. 1 It is the side view structure schematic diagram of integrated wave spring constant pressure contact group of the utility model;

[0017] Fig. 2It is the integral wave spring constant force contact point group's overhead structure schematic view of the utility model;

[0018] Fig. 3 It is the structure schematic view of the utility model's movable contact point group;

[0019] In the drawing: 1, base seat;2, transparent upper cover;3, movable contact point group;4, contact piece;5, wave spring piece;6, movable contact point;7, U-shaped support;8, driving shaft. Specific implementation

[0020] In the utility model, in the case where no opposite statement is made, the orientation such as "up, down" is usually for the direction shown in the drawing, or for the vertical, perpendicular or gravity direction;Similarly, for the convenience of understanding and description, "left, right" is usually for the left and right shown in the drawing;"inner, outer" refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0021] The utility model provides a kind of technical scheme:

[0022] Refer to Figs. 1-3 A kind of integral wave spring constant force contact point group for railway switch machine, including base seat 1, transparent upper cover 2, movable contact point group 3, it is characterized in that, base seat 1 its left, right two areas each is equipped with three groups of symmetrical distribution contact point position, each contact point position includes contact piece 4 and wave spring piece 5, transparent upper cover 2 covers in base seat 1 top and is fixed by limiting structure, movable contact point group 3 is assembled in the clamping groove of base seat 1, movable contact point group 3 includes U-shaped support 7, driving shaft 8 and the movable contact point 6 of installation in the both ends of driving shaft 8, movable contact point 6 is divided into upper and lower two parts, contact piece 4 and wave spring piece 5 are fixed in base seat 1 by fastener, and wave spring piece 5 is pasted with contact piece 4 to provide elastic support.

[0023] Wave spring piece 5 and contact piece 4 are installed in conjunction, and the thickness and elastic modulus of wave spring piece 5 are configured to provide preset elastic support force to contact piece 4, the moving path of movable contact point 6 is jointly defined by the inner wall of the clamping groove of base seat 1 and the guide surface of U-shaped support 7, the movement direction of movable contact point 6 is parallel to the fixed side to free side extension direction of contact piece 4, the upper and lower two parts of movable contact point 6 are connected to driving shaft 8 by independent rotating shaft, and contact piece 4 is provided with through gap in width direction, base seat 1 and transparent upper cover 2 are made of flame-retardant engineering plastics, and the edge of transparent upper cover 2 is provided with sealing structure.

[0024] Specific use, the working principle of the utility model is as follows:

[0025] The base seat 1 and the transparent upper cover 2 are made of high-strength engineering plastic, which has excellent mechanical properties and insulation characteristics, and the transparent upper cover 2 is designed to facilitate real-time observation of the internal contact state. The movable contact group 3 adopts a wave spring sheet 5 elastic support structure to continuously provide stable pressure for the contact sheet 4, effectively avoiding the pressure attenuation problem of traditional contacts caused by metal fatigue. The movable contact 6 adopts a split design, which forms a double-channel redundant contact with the slotted structure of the contact sheet 4, ensuring reliable electrical connection when one side fails. The overall shell has a high protection level and can resist the erosion of dust, moisture and extreme temperature differences, thereby reducing environmental factors that interfere with electrical performance from the root.

[0026] In addition, the contact group has completed pre-installation and debugging before leaving the factory, and the performance state is consistent before and after being installed in the switch machine, so that most of the maintenance work can be transferred to offline, greatly reducing the on-site operation time. Not only suitable for conventional railway scenes, but also can meet the strict requirements of high-speed railways and subways on equipment high stability, long service life and low maintenance cost, through the optimized pressure maintenance mechanism and redundant protection, to ensure the accurate transmission of turnout action signal, realize the reliable cooperation of mechanism locking and electrical interlocking.

[0027] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited to this. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the same technical problem and achieve the same technical effect is also covered by the protection scope of the present application.

Claims

1. A constant force contact set for railway points, comprising a base (1), a transparent cover (2), a movable contact set (3), characterized in that, The base seat (1) is provided with three groups of symmetrically distributed contact point positions in the left and right regions, each group of contact point positions comprising a contact point sheet (4) and a wave spring sheet (5), the transparent upper cover (2) covers the top of the base seat (1) and is fixed by limiting structure, the movable contact point group (3) is assembled in the clamping groove of the base seat (1), the movable contact point group (3) comprises a U-shaped support (7), a driving shaft (8) and movable contact points (6) mounted at both ends of the driving shaft (8), the movable contact points (6) are divided into upper and lower parts, the contact point sheet (4) and the wave spring sheet (5) are fixed to the base seat (1) by fasteners, and the wave spring sheet (5) is attached to the contact point sheet (4) to provide elastic support.

2. The constant force contact set for a railway switch machine according to claim 1, wherein The wave spring sheet (5) is attached to the contact point sheet (4), and the thickness and elastic modulus of the wave spring sheet (5) are configured to provide a predetermined elastic support force to the contact point sheet (4).

3. The constant force contact set for a railway switch machine according to claim 2, wherein The movement path of the movable contact point (6) is jointly defined by the inner wall of the clamping groove of the base seat (1) and the guide surface of the U-shaped support (7), and the movement direction of the movable contact point (6) extends parallel to the fixed side to the free side of the contact point sheet (4).

4. The constant force contact set for a railway switch machine according to claim 3, wherein The upper and lower parts of the movable contact point (6) are connected to the driving shaft (8) through independent rotating shafts, and the contact point sheet (4) is provided with a through gap in the width direction.

5. The integrated wave spring constant force contact set for a railway switch machine of claim 4, wherein, The base seat (1) and the transparent upper cover (2) are made of flame-retardant engineering plastics, and the edge of the transparent upper cover (2) is provided with a sealing structure.

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