A moving point linear motion mechanism for railway switch machine

Abstract

The present invention relates to a moving point linear motion mechanism for railway switch, including a driving block, a central swing body upper block and a lower block, a roller, a roller shaft, a moving point optical axis, a bottom shell inner partition and a guide block, etc., which together form a contact linear motion mechanism; the fan-shaped rotational motion mode of the traditional moving contact is converted into a reciprocating linear motion mode, which is the basic structure for realizing an integrated contact group, and this mechanism can achieve 100% line contact when the moving point is driven into the static point; the switch machine contact switch combination composed of this mechanism maintains the traditional left and right unit structure, but rotates 90° in direction and changes to a horizontal direction, and the static point is two upper and lower springs with the same potential, and an electrical contact redundancy point is added. The advantages of the present invention are that it solves the defects of traditional equipment point contact, multiple fracture failures, and contact piece bias to one side, so that the contact group has very low wear, flexible movement, no card group, reliable electrical action, no trouble, and maintenance-free, which greatly prolongs the electrical contact life of the contact product.

Description

Technical Field

[0001] The invention belongs to the technical field of railway turnout switch machines, and in particular relates to a moving point linear motion mechanism for railway switch machines. Background Art

[0002] According to the data, Xi'an Railway Station, a regular railway, has only 5 platforms and 9 passenger tracks, while Xi'an North Railway Station, a high-speed railway station, has 18 platforms and 34 train lines, but both the entry and exit lines are two lines, which requires nearly 10 times the number of switch machines to be set up for turnout conversion, which puts higher requirements on the conversion 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. The urban underground railway system uses the same railway switch equipment, and its frequency of use is even higher than that of high-speed railways.

[0003] Since 2015, high-speed railway has entered a new journey, with advanced scale and strengthened management, and higher requirements for equipment. The original contact products are no longer suitable for high-speed railway transportation production, and zero failure and maintenance-free requirements have been put forward. The existing contacts cannot overcome the design defects. Although great efforts have been made in materials, production and processing, and quality control, various failures still occur, resulting in missing or errors in representation, affecting the time of train entry and exit, reducing railway transportation efficiency, and causing huge losses in railway transportation. The contact group products currently used have a simple structure, an open and dispersed structure, and the dynamic contacts and static contacts are installed and used in combination. According to statistics, common faults include ring falling out, split pin breakage, point contact, poor contact, contact piece biased to one side, short circuit, contact piece contamination, low insulation resistance, low electrical life, etc. These faults are difficult to completely eliminate, and the root cause lies in the design. According to relevant technical standards, in TB / 1477-2005 "ZD6 Series Electric Switch Machine", the 4.18 switch machine has a reliable service life of 300,000 times. In order to adapt to high-speed rail operation, the new national standard GB / T 25338[1].1-2010 was implemented in March 2011. In 5.10.1, the number of operations of the switch machine test life is divided into two levels: 300,000 times and 1 million times, and the 1 million times level is added. According to statistical data, the existing contacts cannot complete 1 million times of normal on-site use. The equipment has been running with defects for a long time. The maintenance task of the electrical department is very large, and rescue repairs are often carried out, which costs a lot of manpower and financial resources. The most harmful thing is that it affects the normal operation of the train. The reason is that although the contacts are installed inside the switch machine, the switch machine equipment is an outdoor equipment after all. It is subject to high temperature, high humidity, severe cold coastal climate conditions and air pollution, which naturally causes the contact surface to deteriorate, the contact resistance to increase, and the insulation to decrease. In addition, unintentional damage caused by human beings cannot be completely eliminated. This is the fatal defect of the open contact. From the above situation, it can be seen that the technical solution of the existing contacts can no longer meet the needs of high-speed railway passenger cars and subway operations, and the improvement plan cannot fundamentally solve the major problems existing in the original design. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and provide a moving point linear motion mechanism for a railway switch machine, which can achieve 100% line contact and also improve the reliability and stability of electrical contact. Optical shafts, bearings and rolling technologies are used in many places to make the contact group have low wear, flexible movement, no jamming group, reliable electrical action, no trouble, and maintenance-free, which greatly extends the product's electrical contact life.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A moving point linear motion mechanism for a railway switch machine, comprising a bottom shell, an upper shell, a central swing body, a moving point optical axis, a static point unit, a moving contact, a bottom shell inner partition and its guide block, a roller, a standard fastener and a driving block, etc. The central swing body is composed of a swing upper block, a swing lower block, a roller, a roller shaft, a moving point optical axis and a moving point. The moving point optical axis is fixed on the roller, the moving point is fixed at both ends of the moving point optical axis, the roller shaft is arranged at the center of the roller, the swing upper block is connected to the swing lower block up and down, and the moving point optical axis and the moving point are fixed on the swing upper block and the swing lower block;

[0007] The driving block is separately installed on the bracket of the automatic shutter base, and is driven by the indicating rod to rotate and swing in a fan shape to the left and right. The driving block pushes the roller, and the roller drives the central swing body and its moving point optical axis to perform reciprocating linear motion along the inner wall of the guide block. The moving points at both ends of the moving point optical axis also perform linear driving and pulling actions under the push of the driving block to form the closing or disconnection of the contact group.

[0008] The static point unit is provided with a static point right unit and a static point left unit, which are combined into a group of static contacts, forming a total of six groups of static contacts; the static point left / right unit is composed of a static point upper piece and a static point lower piece and is installed on the upper shell body, connected into an equipotential body, and a group of moving points is provided between the left and right static point units. The moving points and the static point units form a group of contact switch devices, which, as part of an integrated contact, constitute a total of 6 contact switch devices.

[0009] Preferably, this is the first implementation of a mechanism for converting semi-rotational motion into linear motion on a railway switch joint. It does not utilize a matching mechanism of a sector gear driving a linear gear, nor does it use an upper suspension combined with a sliding groove mechanism.

[0010] Preferably, the moving point adopts a solid dumbbell structure, and the side surface of the moving point is an arc surface with a small angle to reduce friction. The moving point can rotate smoothly and freely in the light holes at both ends of the optical axis under the push of the friction force of the contact piece. The shaft is small and the rotational inertia is large, which is conducive to rotation. There is no situation where it is fixed at one point or one line and wear affects the life of the moving point. The traditional thin-walled contact ring and retaining ring blocking structure are eliminated, forming a structure with high mechanical strength and good rotation, without the risk of breakage and failure of cotter pins, retaining rings, contact columns, etc. The moving point can also be cylindrical, oblique insert or other shapes.

[0011] Preferably, the central swing body is a fixed combination; it can also be other combinations, for example, the central swing body does not use swinging upper and lower blocks, and is divided into three independent rollers, roller clamping block optical axes and moving points, etc. The driving block is then set with 3 roller slots for use with the rollers, and the rollers are driven by the inner walls of the roller slots to reciprocate, and the contact group for the switch machine is composed of a combination of 3 moving point optical axes and 6 moving points; the integrated contact group for the close-fitting indicator can be composed of a combination of 2 moving point optical axes and 4 moving points.

[0012] Preferably, the driving block is separately mounted on a bracket below the base of the automatic switch machine switch by means of M6 bolts.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The technical solution of the present invention provides a moving point linear motion mechanism for railway switch machines. The central swing body and its moving contact of this case split the vertical contact ring of the traditional moving contact group into two independent unit structures on the left and right, rotated 90° in the direction, and designed as two moving points with the same potential, which are electrically contacted with the static contacts on the left and right sides respectively, and can complete the same electrical interlocking function. It is precisely because of the separation into left and right unit structures that independent sealing can be achieved, which becomes the technical basis of the integrated sealing contact group, provides key technical support for the upgrading of contact products, and is one of the most effective measures to reduce the failure rate of contacts; the installation size remains unchanged and can be completely interchangeable with existing contacts. In addition, the present invention can achieve 100% line contact, which also improves the reliability and stability of electrical contact. In terms of design concept, the advantages of contact action sweep, moving point rotation, line contact, large starting and passing current, large disconnection distance, and rapid disconnection are maintained; optical axis, bearing and rolling technology are used in many places, so that the contact group has low wear, flexible movement, no card group, reliable electrical action, long life, no trouble, and maintenance-free. After various tests, it has met the highest requirements of the Railway Corporation for the contact group, and the electrical performance is reliable, stable and safe. It solves many defects of existing equipment, such as point contact, broken retaining ring, broken contact column, large unilateral deviation of contact piece and many other faults that affect electrical contact, which can ensure the quality and safety of the use of key railway equipment.

[0015] The technology of the present invention is used to control the action of railway turnout switch machines, indicate that the inbound and outbound turnouts stay in the fixed or reverse position and state, and realize the integrated contact group of mechanism locking and electrical interlocking, and is particularly suitable for the integrated sealed contact group used in high-speed railways or subway switch machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of more clearly illustrating the technical solutions in the embodiments of the present invention or the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention installed in an integrated sealed contact group;

[0018] Figure 2 , 3 4 is a schematic diagram of the structure of the integral central swing body of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the separate swinging body of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of the driving block of the present invention;

[0021] Figure 7 This is a schematic diagram of the structure of another driving block of the present invention that can drive three moving points;

[0022] Figure 8 , 9 It is a schematic diagram of the contact combination structure of the present invention;

[0023] Fig.10 This is a schematic diagram of the mechanism for driving the close-fitting indicator using a two-position contact group.

[0024] In the figure: 1-bottom shell, 2-upper shell, 3-central swing body, 4-static point upper piece, 5-moving contact, 6-static point lower piece, 7-driving block, 8-guide block, 9-bottom shell inner partition, 10-static point unit, 11-static point right unit, 12-static point left unit, 15-moving point optical axis, 16-roller, 19-moving point, 20-swinging lower block, 21-swinging upper block, 22-roller shaft, 23-automatic shutter base, 24-bracket. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is further described below in conjunction with specific embodiments. However, the embodiments are only intended to illustrate the present invention and not to limit the present invention.

[0026] like Figure 1-10The moving point linear motion mechanism for a railway switch shown in the figure comprises a bottom shell 1, an upper shell 2, a central swing body 3, a moving point optical axis 15, a static point unit 10, a moving contact 5, a bottom shell inner partition 9 and its guide block 8, a roller 16, a standard fastener and a driving block 7. The driving block 7 installed on the left and right brackets 24 of the railway switch automatic switch is driven by the indicating rod to rotate and swing in a left and right fan shape. The driving block 7 pushes the roller 16, and the roller 16 drives the central swing body 3 and its moving point optical axis 15 to reciprocate along the guide block 8. The moving points at both ends also perform linear driving and pulling actions under the push of the moving point optical axis 15 to form a contact group closing or disconnecting function. This is the first implementation of a mechanism that converts semi-rotational motion into linear motion on a railway switch contact. Here, there is no matching mechanism of using a fan gear to drive a linear gear, and no upper suspension combined with a sliding groove mechanism is used to achieve this.

[0027] The central swing body 3 is composed of a swing upper block 21, a swing lower block 20, a roller 16, a roller shaft 22, a moving point optical axis 15, a moving point 19 and standard fasteners; the moving point optical axis 15 is fixed on the roller 16, the moving point 19 is fixed at both ends of the moving point optical axis 15, the roller shaft 22 is arranged at the center of the roller 16, the swing upper block 21 is connected to the swing lower block 20 up and down, and the moving point optical axis 15 and the moving point 19 are fixed on the swing upper block 21 and the swing lower block 20;

[0028] Among them, the moving contact 5 (for the switch machine) is formed by three moving point optical axes 15 and six moving points 19;

[0029] Among them, the central swing body 3 and its moving contact 5 split the original vertical contact ring mode of the moving contact group into two left and right unit structures, but the direction is different from the original, rotated 90°, and designed as two moving points 19 with the same potential, which are electrically contacted with the static contacts on the left and right sides respectively to complete their electrical functions.

[0030] As a preferred technical solution of the present invention, the moving point linear motion mechanism is an overall solution, such as Figure 5 The central swing body and the moving point can also be combined in other ways, divided into three, each independent, and the driving block 7 is modified accordingly, such as Figure 6 For 3 slots, other changes are appropriate; the mechanism for the close fitting indicator can be composed of a 2-position combination;

[0031] As a preferred technical solution of the present invention, the moving contact 5 adopts a solid dumbbell structure; the moving point 19 can also be cylindrical, oblique insert or other shapes, and the surface of the metal wheel of the moving point 19 can be rolled with twill or mesh.

[0032] When the integrated sealed contact group is used, the present invention uses 2 static contact groups and 1 moving contact group, which are originally used in a dispersed combination, to form a total of 3 units. The design of the contact is revolutionary modified and designed as an integrated contact unit. The contact switch combination maintains the original left and right unit structure, but the direction is different from the original, rotated 90°, and designed as 2 upper and lower springs with the same potential, adding 1 contact point to form a redundant structure. The left 3-way 6 external terminals and the right 3-way 6 external terminals are maintained, and the moving contact combination is increased from 3 to 6 contact wheels, achieving the same circuit performance and quantity switch relationship. The center is to rotate the moving contact group from the vertical fan-shaped swing mode to the horizontal linear reciprocating motion, and at the same time split the 3 contact rings into two sides that are in contact respectively, with a total of 6 moving point wheels, but the electrical interlocking action maintains an either-or relationship, and the middle position does not contact. Only in this way can the integrated closed function be realized, and it can also be designed as a semi-enclosed shape shell. This structural solution solves the major problems of the contact group, and further solves many defects of existing contact equipment, such as point contact, broken retaining rings, broken contact columns, large unilateral deviation of contact pieces, and other faults that affect electrical contact.

[0033] A variety of innovative solutions are used in technology:

[0034] 1) The switch combination formed by the moving point linear motion mechanism and the static point unit 10 in the form of upper and lower sheets. When the moving point linear motion reaches a certain driving depth, the upper and lower sheets are impacted by the moving point roller and shrink inward. The roller rolls and rotates on the surface of the contact sheet under the squeezing force of the upper and lower sheets. During the contact process, the moving point wheel and the sheet form a 100% line contact form, and when withdrawing, due to the high speed, the moving point wheel will spin. This contact method overcomes the existing contact point that only has line contact when the center lines are perpendicular to each other, and is in point contact in other cases. After long-term use and running-in, the width of the contact line will increase. During production, it cannot be guaranteed that the contact line exceeds 1 / 2 at any driving depth. This product defect is caused by design;

[0035] 2) The complex curved motion of the central swing body 3 roller up and down and forward and backward composite motion is adopted to convert the fan-shaped swing of the automatic shutter bracket 24 into a reciprocating linear motion form of the moving point optical axis, replacing the original fan-shaped rotation driving structure, which is one of the core technologies of the integrated contact.

[0036] The technology of the present invention is used to control the action of railway turnout switch machines, indicate that the inbound and outbound turnouts stay in the fixed or reverse position and state, and realize the mechanism locking and electrical interlocking of the moving contact group, and is particularly suitable for the integrated sealed contact group of the switch machines used in high-speed railways or subways.

[0037] The contents not described in detail in the present invention are all prior art.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A moving point linear motion mechanism for a railway switch machine, comprising a bottom shell (1), an upper shell (2), a central swing body (3), a moving point optical axis (15), a moving contact (5), a bottom shell inner partition (9) and its guide block (8), a roller (16), a standard fastener and a drive block (7), characterized in that: The central swing body (3) is composed of a swing upper block (21), a swing lower block (20), a roller (16), a roller shaft (22), a moving point optical axis (15), and a moving point (19); the moving point optical axis (15) is fixed between the swing upper block (21) and the swing lower block (20); the moving point (19) is installed at both ends of the moving point optical axis (15); the roller shaft (22) is arranged at the center of the roller (16); the moving contact (5) is formed by three moving point optical axes (15) and six moving points (19); the swing upper block (21) and the swing lower block (20) are connected and fixed up and down by standard fasteners; the central swing body (3) and its moving contact (5) split the vertical contact ring of the moving contact group into two left and right unit structures, and are designed as two moving points (19) with the same potential, which are respectively in electrical contact with the static contacts on the left and right sides; The driving block (7) is independently mounted on a bracket (24) of the automatic shutter base (23), and is driven by the indicating rod to rotate and swing in a left and right fan shape. The driving block (7) pushes the roller (16), and the roller (16) drives the central swing body (3) and its moving point optical axis (15) to perform reciprocating linear motion along the inner wall of the guide block (8). The moving points (19) at both ends of the moving point optical axis (15) also perform linear driving and pulling actions under the push of the moving points, and together with the static point unit (10) form the closing or opening of the contact group; The static point unit (10) is provided with a static point right unit (11) and a static point left unit (12), and the static point right unit (11) and the static point left unit (12) are combined into a group of static contacts, forming a total of six groups of static contacts; the static point right unit (11) and the static point left unit (12) are both composed of a static point upper plate (4) and a static point lower plate (6) and are installed on the upper shell (2) to form an equipotential body, and a group of moving points (19) is provided between the left and right static point units, and the moving points (19) and the static point unit (10) form a group of contact switch devices as part of an integrated contact, forming a total of six contact switch devices; The central swing body (3) is divided into three independent roller clamping block optical axes and moving points, and the driving block (7) is provided with three roller slots for use with the rollers, and the rollers are driven by the inner walls of the roller slots to reciprocate.

2. The moving point linear motion mechanism for railway switch according to claim 1, characterized in that: The driving block (7) is separately mounted on a bracket (24) of the switch machine automatic switch base (23) by means of M6 bolts.

3. The moving point linear motion mechanism for railway switch according to claim 1, characterized in that: The moving point (19) is in the shape of a cylindrical solid dumbbell, a plug-in shape or other shapes.

4. The moving point linear motion mechanism for a railway switch according to claim 1, characterized in that: The central swing body (3) is a fixed assembly.

5. The moving point linear motion mechanism for railway switch according to claim 1, characterized in that: The switch machine contact group is composed of a combination of three moving point optical axes (15) and six moving points (19); and the close-fitting indicator integrated contact group is composed of a combination of two moving point optical axes (15) and four moving points (19).

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