Double-leaf wave spring constant-pressure static contact group for high-speed railway switch machine

Abstract

The utility model belongs to the technical field of railway turnout switch machines, in particular to a double-leaf wave spring constant pressure static contact group for a high-speed railway switch machine, which comprises a static contact block, three contact points are arranged on the static contact block, and limit blocks are arranged at the upper ends of two sides of each contact point; a left contact piece and a right contact piece are arranged on the left side and the right side of the contact point respectively, and slots are formed in the left contact piece and the right contact piece; according to the utility model, the multilayer wave spring technology is adopted, and the design of slotting in the middle of the contact sheet is adopted, so that the contact surface between the movable contact ring and the contact sheet can be increased, the contact can be improved, the certain flexibility of the contact sheet can be increased, the contact sheet can be attached to the movable contact ring more tightly, and the contact performance of the movable contact ring can be improved. The number of electric contact points is increased, the electric contact is more reliable, and the electrical performance is more excellent.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway turnout switch machines, and in particular relates to a double-piece wave spring constant pressure static contact group for high-speed railway switch machines. Background Art

[0002] With the development of international trade, logistics and tourism, tremendous pressure has been exerted on railway transportation capacity, and higher requirements have been put on railway turnout switching equipment, requiring trouble-free, maintenance-free, stable and reliable switch machines and their contact groups. The contact group is one of the most important electrical components of the switch machine, and its reliable and stable electrical contact performance when connected is particularly important.

[0003] The contact group products currently in use have a simple structure, and the contact pieces are elastically compensated and supported by reinforcement pieces on the outside. However, faults such as point contact, unilateral deviation of the contact pieces, short circuit, poor contact, low insulation resistance, and low electrical life are difficult to eliminate. When the train is running, some contacts will bounce and disconnect due to vibration. The equipment runs with defects for a long time, and the electrical section has a heavy maintenance task and often carries out rescue repairs, which consumes huge manpower and financial resources. The most harmful thing is that it affects the normal operation of the train.

[0004] Based on the above situation, the utility model newly proposes a double-piece wave spring constant pressure static contact group for high-speed railway switch machine. Utility Model Content

[0005] In order to solve the above-mentioned problems existing in the prior art, the utility model provides a double-piece wave spring constant pressure static contact group for high-speed railway switch machines, which adopts multi-layer wave spring technology and, through the design of a slit in the middle of the contact piece, can increase the contact surface between the moving contact ring and the contact piece, improve the contact, and increase the flexibility of the contact piece to a certain extent, so that it fits more closely with the moving contact ring, thereby increasing the number of electrical contact points, making the electrical contact more reliable, and improving the electrical performance.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-piece wave spring constant pressure static contact group for a high-speed railway switch, comprising a static contact block, three contact positions are arranged on the static contact block, and limit blocks are arranged on the upper ends of both sides of the contact positions, and the limit blocks are connected to the static contact block;

[0007] A left contact piece and a right contact piece are respectively arranged on the left and right sides of the contact position, and both the left contact piece and the right contact piece are provided with slits;

[0008] A left wave spring group is arranged on the left side of the contact point, and the left wave spring group includes a left outer wave spring, a left middle wave spring and a left inner wave spring, the left outer wave spring is in contact with a limit block, the left inner wave spring is in contact with a left contact point, and the left middle wave spring is arranged between the left outer wave spring and the left inner wave spring, and a right wave spring group is arranged on the right side of the contact point, and the right wave spring group includes a right outer wave spring, a right middle wave spring and a right inner wave spring, the right outer wave spring is in contact with a limit block, the right inner wave spring is in contact with a right contact point, and the right middle wave spring is arranged between the right outer wave spring and the right inner wave spring;

[0009] A raised isolation wall is provided in the contact position, and slots for inserting the bottom end of the contact piece and the wave spring piece group are provided on both sides of the isolation wall. A fixing hole for fixing the bottom end of the contact piece and the wave spring piece group is provided on one side of the slot, and standard fasteners are assembled and fixed in the fixing hole.

[0010] As an optimal technical solution for a double-piece wave spring constant pressure static contact group for a high-speed railway switch machine of the utility model, the width of the slit is about 0.5 mm and the length is 38±5 mm.

[0011] As an optimal technical solution for a double-piece wave spring constant pressure static contact group for a high-speed railway switch machine of the utility model, the upper ends of the left outer wave spring, the left inner wave spring, the right outer wave spring and the right inner wave spring are all wavy.

[0012] As an optimal technical solution for a double-leaf wave spring constant pressure static contact group for a high-speed railway switch machine of the utility model, the left outer wave spring, right outer wave spring, left middle wave spring, right middle wave spring, left inner wave spring, and right inner wave spring are all made of high-elastic stainless steel thin strips and formed by stamping dies.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model adopts multi-layer wave spring technology and a slit in the middle of the contact piece, which can increase the contact surface between the moving contact ring and the contact piece, improve the contact, increase the flexibility of the contact piece, and fit more closely with the moving contact ring, increase the number of electrical contact points, make the electrical contact more reliable, and improve the electrical performance.

[0015] The middle wave spring of the utility model provides a buffer space for the inner and outer wave springs. The three layers of wave springs interact with each other during compression, and the compression rate is small and stable during deformation, and the mechanical life of the spring is greatly improved, thereby overcoming the serious defects of the single-layer wave spring, such as large compression rate, inability to stretch in time and prolonged reaction lag.

[0016] 3. The utility model has obvious advantages. Due to the reaction force of forced limiting, the contact pressure rises rapidly when the moving point contacts the contact piece, which completely destroys the surface oxide film and provides good contact. Because its supporting force is dispersed and soft, the contact pressure is stable and the contact piece will not bounce away, thus overcoming the hidden danger of contact bouncing and disconnection caused by vibration in ordinary contact groups.

[0017] 4. The utility model has multiple supporting points and the supporting force is dispersed gently, so that after the contact ring is driven in, the contact piece is deformed by pressure and twists slightly, and fits tightly with the contact ring to form line contact, thus overcoming the undesirable phenomenon of point contact of existing contacts and achieving good contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a side view structural diagram of the right contact piece and the right contact piece connected to each other in the utility model;

[0021] Figure 3 It is a schematic diagram of the connection structure of the right outer wave reed, the right middle wave reed and the right inner wave reed of the utility model.

[0022] In the figure: 1. static contact block; 2. left contact piece; 3. right contact piece; 4. left outer wave spring; 5. right outer wave spring; 6. left medium wave spring; 7. right medium wave spring; 8. left inner wave spring; 9. right inner wave spring; 10. standard fastener; 11. limit block; 12. slit. DETAILED DESCRIPTION

[0023] 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. Example

[0024] See also Figure 1-3The utility model provides the following technical solutions: a double-piece wave spring constant pressure static contact group for a high-speed railway switch machine, including a static contact block 1, on which three contact positions are arranged, and limit blocks 11 are arranged on the upper ends of both sides of the contact positions, and the limit blocks 11 are connected to the static contact block 1, which adopts the left and right limit block 11 technology, and the contact pressure can also be adjusted by changing the spacing between the left and right limit blocks 11.

[0025] Furthermore, a left contact piece 2 and a right contact piece 3 are respectively provided on the left and right sides of the contact position, and a slit 12 is provided on both the left contact piece 2 and the right contact piece 3. The width of the slit 12 is about 0.5 mm and the length is 38±5 mm.

[0026] Further, a left wave reed group is arranged on the left side of the contact position, and the left wave reed group includes a left outer wave reed 4, a left middle wave reed 6 and a left inner wave reed 8. The left outer wave reed 4 is in contact with the limit block 11, the left inner wave reed 8 is in contact with the left contact piece 2, and the left middle wave reed 6 is arranged between the left outer wave reed 4 and the left inner wave reed 8. A right wave reed group is arranged on the right side of the contact position, and the right wave reed group includes a right outer wave reed 5, a right middle wave reed 7 and a right inner wave reed 9. The right outer wave reed 5 is in contact with the limit block 11, the right inner wave reed 9 is in contact with the right contact piece 3, and the right middle wave reed 7 is arranged between the right outer wave reed 5 and the right inner wave reed 9. The upper ends of the inner wave springs 9 are all wavy. The left outer wave spring 4, the right outer wave spring 5, the left middle wave spring 6, the right middle wave spring 7, the left inner wave spring 8, and the right inner wave spring 9 are all made of high-elastic stainless steel thin strips and processed by stamping dies. The wave spring technology is used to replace the existing reinforcement plate auxiliary plate. The supporting force of the wave spring can be adjusted by selecting the difference in the elasticity of the raw material, that is, the HV hardness to adjust the contact pressure of the contact point. The contact pressure can also be adjusted by selecting different thicknesses of the wave springs. It can also be designed to have different curvature waveforms for adjustment. In short, the contact pressure of the contact point can be optimized by combining different methods to meet the needs of the railway and make the performance of the contact point product better.

[0027] Furthermore, a raised isolation wall is provided in the contact position, which increases the height of the isolation wall between the left and right adjacent contact pieces, increases the creepage distance, and enhances the insulation strength and safety. Slots for inserting the bottom ends of the contact pieces and the wave spring piece group are provided on both sides of the isolation wall, and a fixing hole for fixing the bottom ends of the contact pieces and the wave spring piece group is provided on one side of the slot, which is not specifically marked in the figure, and a standard fastener 10 is assembled and fixed in the fixing hole.

[0028] In this embodiment, the utility model adopts multi-layer wave spring technology. At the same time, through the design of the slit 12 in the middle of the contact piece, the contact area between the moving contact ring and the contact piece can be increased, the contact is improved, and the flexibility of the contact piece is increased to fit more closely with the moving contact ring, thereby increasing the number of electrical contact points, making the electrical contact more reliable, and the electrical performance better, which is the design highlight of the utility model.

[0029] In addition, the middle wave spring provides a buffer space for the inner and outer wave springs. The three layers of wave springs interact with each other during compression, and the compression rate is small and stable during deformation. The mechanical life of the spring is greatly improved, overcoming the serious defects of the single-layer wave spring, which has a large compression rate and cannot be stretched in time and prolongs the reaction lag.

[0030] The mechanical life of the multi-layer wave spring is greatly extended, making this static contact assembly a long-life product.

[0031] The static contact group has obvious advantages. Due to the reaction force of the forced limit, the contact pressure rises rapidly when the moving point contacts the contact piece, which completely destroys the surface oxide film and provides good contact. Because its supporting force is dispersed and soft, the contact pressure is stable and the contact piece will not bounce away, which overcomes the hidden danger of contact bouncing and disconnection caused by vibration in ordinary contact groups.

[0032] The wave spring is made of highly elastic stainless steel thin strip and formed by stamping die processing. The existing products use beryllium bronze, an alloy of rare metals and precious metals. Replacing beryllium bronze with stainless steel can save a lot of rare metals and precious metals, save a lot of social resources and generate social benefits. In terms of quality, it saves 50% of the usage; even the usage of stainless steel is reduced by more than 50%. The thickness of each piece is 0.1mm, and the original single piece thickness is 0.6mm. 3*0.1mm is only 0.3mm, and the density of steel is slightly smaller than that of copper alloy.

[0033] The insulating isolation wall, which is higher than the existing protrusion, significantly increases the creepage distance between the left and right adjacent contact pieces, avoids incorrect contact closure caused by pollutants and abnormal falling objects, and enhances the electrical insulation strength between the contact pieces.

[0034] The utility model further provides a slit 12 on the left contact piece 2 and the right contact piece 3. By providing the slit 12, the contact surface between the wave spring and the left contact piece 2 and the right contact piece 3 can be increased to improve the contact. At the same time, a certain flexibility of the left contact piece 2 and the right contact piece 3 is increased, and the fit with the moving contact ring is more closely, so that the electrical contact points are increased, the point contact is more reliable, and the electrical performance is better, which is a further design point of the utility model.

[0035] In addition, the contents not described in detail in this embodiment are all within the scope of prior art and common knowledge.

[0036] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-piece wave spring constant pressure static contact group for a high-speed railway switch, comprising a static contact block (1), characterized in that: The static contact block (1) is provided with three contact positions, and limit blocks (11) are provided at the upper ends of both sides of the contact positions, and the limit blocks (11) are connected to the static contact block (1); A left contact piece (2) and a right contact piece (3) are respectively provided on the left and right sides of the contact point, and both the left contact piece (2) and the right contact piece (3) are provided with a slit (12); A left wave spring group is arranged on the left side of the contact point, the left wave spring group comprises a left outer wave spring (4), a left middle wave spring (6) and a left inner wave spring (8), the left outer wave spring (4) is in contact with a limit block (11), the left inner wave spring (8) is in contact with a left contact point (2), and the left middle wave spring (6) is arranged between the left outer wave spring (4) and the left inner wave spring (8), and a right wave spring group is arranged on the right side of the contact point, the right wave spring group comprises a right outer wave spring (5), a right middle wave spring (7) and a right inner wave spring (9), the right outer wave spring (5) is in contact with a limit block (11), the right inner wave spring (9) is in contact with a right contact point (3), and the right middle wave spring (7) is arranged between the right outer wave spring (5) and the right inner wave spring (9); A raised partition wall is provided in the contact position, and slots for inserting the bottom end of the contact piece and the wave spring piece group are provided on both sides of the partition wall. A fixing hole for fixing the bottom end of the contact piece and the wave spring piece group is provided on one side of the slot, and a standard fastener (10) is assembled and fixed in the fixing hole.

2. A double-piece wave spring constant pressure static contact assembly for a high-speed railway switch according to claim 1, characterized in that: The slit (12) has a width of about 0.5 mm and a length of 38±5 mm.

3. The double-piece wave spring constant pressure static contact assembly for high-speed railway switch according to claim 1, characterized in that: The upper ends of the left outer wave reed (4), the left inner wave reed (8), the right outer wave reed (5), and the right inner wave reed (9) are all wavy.

4. The double-piece wave spring constant pressure static contact assembly for high-speed railway switch according to claim 1, characterized in that: The left outer wave reed (4), the right outer wave reed (5), the left medium wave reed (6), the right medium wave reed (7), the left inner wave reed (8), and the right inner wave reed (9) are all formed by processing with a stamping die using a high-elasticity stainless steel thin strip.

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