Railway turnout switching equipment and turnout hook-shaped external locking device thereof

Abstract

The utility model discloses railway turnout switching equipment and a turnout hook-shaped external locking device thereof, which belong to the technical field of rail transit, and the turnout hook-shaped external locking device comprises a switch rail connecting iron component, a push-pull plate component, a connecting iron seat component and a lock hook, the push-pull plate assembly is connected with the switch rail connecting iron assembly and the connecting iron base assembly. The switch rail connecting iron assembly is connected with the connecting iron seat assembly; and the lock hook is connected with the connecting iron seat assembly. The turnout hook-type external locking device is simple in structure, convenient to install, reasonable in design, small in abrasion between parts, long in replacement period, small in later maintenance workload, high in adaptability to extension and retraction of a switch rail, beneficial to keeping parallelism between the external locking parts, capable of reducing frictional resistance during turnout switching, capable of improving reliability of turnout switching, and capable of being used for improving the reliability of turnout switching. And the workload of turnout maintenance is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit technology, and specifically relates to a railway turnout switching device and its turnout hook-type external locking device. Background Technology

[0002] Railway turnout switching equipment is crucial for ensuring the safe switching of railway turnouts. During normal turnout switching, the equipment performs functions such as switching, locking, and indication. The external locking device is a vital component of this equipment. The earliest external locking devices used a linked dovetail type, while for high-speed turnouts, a separate dovetail type was adopted. Later, improved external locking devices were developed to better adapt to the "expansion and contraction" effect of the turnout switch rails. The "expansion and contraction" effect refers to the phenomenon where the switch rails expand and contract relative to the stock rails due to thermal expansion and contraction under different temperature conditions. In large-number turnouts, the expansion and contraction of the switch rails can reach ±40mm. This expansion and contraction alters the parallelism between the external locking components, potentially causing the external lock to fail to unlock or jamming during switching in extreme cases. Although the improved hook-type external locking device incorporates many "anti-creep" structural measures such as long pins and clamps to accommodate this expansion and contraction, jamming still occurs in field applications. Meanwhile, existing external locking devices are relatively complex to maintain, and some moving parts are prone to wear or breakage, which affects their service life. Utility Model Content

[0003] To address the aforementioned problems, this utility model discloses a turnout hook-type external locking device, comprising: a switch rail connecting iron assembly, a push-pull plate assembly, a connecting iron base assembly, and a locking hook;

[0004] The push-pull plate assembly is connected to the switch rail connecting iron assembly and the connecting iron base assembly, respectively;

[0005] The switch rail connecting iron assembly is connected to the connecting iron base assembly;

[0006] The locking hook is connected to the connecting iron base assembly;

[0007] The switch rail connecting iron assembly includes a switch rail connecting iron, a wear-resistant plate, and a lubricating pad;

[0008] The switch rail connecting iron includes a first vertical plate, a second vertical plate, a horizontal plate, and an elongated hole;

[0009] The horizontal plate is provided with a first vertical plate and a second vertical plate at intervals; the horizontal plate is provided with a number of elongated holes and a number of lubrication pad grooves.

[0010] Wear-resistant plates are provided on both sides of the second vertical plate;

[0011] The lubricating pad is disposed in the lubricating pad groove;

[0012] The push-pull plate assembly includes a push-pull plate, a slider, and a pin.

[0013] One end of the push-pull plate is connected to the elongated hole of the switch rail connecting iron assembly via a slider and a pin; the connecting iron base assembly includes a connecting iron base and a connecting iron base shaft;

[0014] The connecting iron base is provided with a third vertical plate at one end and a through hole at the other end;

[0015] The third vertical plate is hooked to the second vertical plate of the switch rail connecting iron;

[0016] The other end of the connecting iron base is connected to the other end of the push-pull plate via the connecting iron base shaft.

[0017] Furthermore, the switch rail connecting iron also includes: a side plate and threaded holes;

[0018] Side plates are provided on both sides of the switch rail connecting iron;

[0019] The side plate has a threaded hole at the end away from the first upright plate.

[0020] Furthermore, the switch rail connecting iron assembly also includes: a bolt assembly and a protective plate; the protective plate is mounted on the side plate;

[0021] The bolt assembly is installed in the first connecting hole of the first upright plate.

[0022] Furthermore, the switch rail connecting iron also includes: a drain trough;

[0023] The sewage trough is installed on the horizontal plate.

[0024] Furthermore, the push-pull plate includes a column, an upper sector plate, and a lower sector plate;

[0025] One end of the column is connected to an upper sector plate, and the other end is connected to a lower sector plate;

[0026] The column is provided with a second connecting hole;

[0027] The upper sector plate is provided with several cylindrical countersunk holes;

[0028] The lower sector plate has several through holes and mounting holes.

[0029] Furthermore, the slider is slidably disposed within the elongated hole of the switch rail connecting iron assembly; the push-pull plate is connected to the slider via a pin.

[0030] Furthermore, the push-pull plate assembly also includes: a disc spring seat;

[0031] The disc spring seat includes a stepped surface, a limiting surface, and a stepped shaft connected in sequence;

[0032] The stepped shaft is installed in the mounting hole of the lower sector plate.

[0033] Furthermore, the push-pull plate assembly also includes: a first disc spring;

[0034] The first disc spring is sleeved on the stepped shaft.

[0035] Furthermore, the connecting iron base assembly also includes: a washer and a second disc spring;

[0036] The connecting iron base shaft passes sequentially through the through hole of the connecting iron base, the washer, the second connecting hole of the push-pull plate, the washer, the second disc spring, and is connected to the nut.

[0037] This utility model also discloses a railway turnout switching device, including the aforementioned turnout hook-type external locking device.

[0038] Compared with the prior art, the beneficial effects of this utility model are: the turnout hook-type external locking device has a simple structure, is easy to install, has a reasonable design, low wear between parts, long replacement cycle, low workload of later maintenance, strong adaptability to switch rail expansion and contraction, helps to maintain the parallelism between the external locking parts, reduces frictional resistance during turnout switching, improves the reliability of turnout switching, reduces the workload of turnout maintenance, and the product also has overall considerations in terms of protection, with reserved relevant interfaces to facilitate the later installation of protective equipment.

[0039] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A schematic diagram of the structure of the turnout hook-type external locking device according to an embodiment of the present invention is shown;

[0042] Figure 2 A schematic diagram of the structure of the switch rail connecting iron assembly according to an embodiment of the present invention is shown. Figure 1 ;

[0043] Figure 3 A schematic diagram of the structure of the switch rail connecting iron assembly according to an embodiment of the present invention is shown. Figure 2 ;

[0044] Figure 4 A schematic diagram of the structure of a push-pull plate assembly according to an embodiment of the present invention is shown;

[0045] Figure 5 A schematic diagram of a push-pull plate structure according to an embodiment of the present invention is shown;

[0046] Figure 6 A schematic diagram of a slider structure according to an embodiment of the present invention is shown;

[0047] Figure 7 A schematic diagram of the disc spring seat structure according to an embodiment of the present invention is shown;

[0048] Figure 8 A schematic diagram of the connecting iron base assembly structure according to an embodiment of the present utility model is shown;

[0049] Figure 9 A schematic diagram of the operation of the turnout hook-type external locking device according to an embodiment of the present invention is shown.

[0050] Reference numerals: 1. Switch rail connecting iron assembly; 1-1. Switch rail connecting iron; 1-2. Wear-resistant plate; 1-3. Lubricating pad; 1-4. Bolt assembly; 1-5. Protective plate; 1-11. First vertical plate; 1-12. First connecting hole; 1-13. Second vertical plate; 1-14. Horizontal plate; 1-15. Oblong hole; 1-16. Lubricating pad groove; 1-17. Drainage groove; 1-18. Side plate; 1-19. Threaded hole;

[0051] 2. Push-pull plate assembly; 2-1. Push-pull plate; 2-2. Slider; 2-3. Pin; 2-4. Disc spring seat; 2-5. First disc spring; 2-11. Upper sector plate; 2-12. Lower sector plate; 2-13. Columnar countersunk hole; 2-14. Mounting hole; 2-15. Arc surface; 2-16. Second connecting hole; 2-17. Oblong surface; 2-18. Slider through hole; 2-19. Stepped surface; 2-20. Limiting surface; 2-21. Stepped shaft;

[0052] 3. Connecting iron base assembly; 3-1. Connecting iron base; 3-11. Third vertical plate; 3-2. Connecting iron base shaft; 3-3. Washer; 3-4. Second disc spring;

[0053] 4. Locking hook;

[0054] 5. Switch rail;

[0055] 6. Basic track. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0057] like Figure 1 As shown in the figure, a turnout hook-type external locking device proposed in this embodiment includes: a switch rail connecting iron assembly 1, a push-pull plate assembly 2, a connecting iron base assembly 3, and a locking hook 4;

[0058] The push-pull plate assembly 2 is connected to the switch rail connecting iron assembly 1 and the connecting iron base assembly 3 respectively;

[0059] The switch rail connecting iron assembly 1 is connected to the connecting iron base assembly 3;

[0060] One end of the locking hook 4 is connected to the connecting iron base assembly 3, and the other end is connected to the basic rail 6;

[0061] like Figure 2 As shown, the switch rail connecting iron assembly 1 includes a switch rail connecting iron 1-1, a wear-resistant plate 1-2, and a lubrication pad 1-3;

[0062] The switch rail connecting iron 1-1 includes a first vertical plate 1-11 arranged horizontally, a second vertical plate 1-13 arranged horizontally, a horizontal plate 1-14, and an oblong hole 1-15;

[0063] Two first connecting holes 1-12 are provided on the first vertical plate 1-11 for fixing to the switch rail 5 by means of bolt assembly 1-4;

[0064] The horizontal plate 1-14 is provided with a first vertical plate 1-11 and a second vertical plate 1-13 at intervals; the horizontal plate 1-14 is provided with a plurality of elongated holes 1-15 and a plurality of lubrication pad grooves 1-16.

[0065] The upper surface of the horizontal plate 1-14 is the main friction surface of the push-pull plate 2-1. Therefore, several embedded lubricating pads 1-3 are set on the upper surface of the horizontal plate 1-14. The lubricating pads 1-3 can replace the function of lubricating grease, greatly reducing on-site maintenance work.

[0066] The lower plane of the horizontal plate 1-14 is in contact with the stepped surface 2-19 of the disc spring seat 2-4. The stepped surface 2-19 can reduce the friction area. The disc spring seat 2-4 is installed in the mounting hole 2-14 of the fan-shaped plate 2-12 under the push-pull plate 2-1.

[0067] For example, two elongated holes 1-15 are provided in a figure-eight shape, and a lubrication pad groove 1-16 is provided around the elongated holes 1-15; the two center lines of the figure-eight elongated holes 1-15 intersect at the center of the second connecting hole 2-16 of the push-pull plate 2-1.

[0068] Wear-resistant plates 1-2 are provided on both sides of the second vertical plate 1-13; they can be easily replaced if wear occurs after long-term operation, thus improving service life.

[0069] like Figure 3 As shown, the lubrication pads 1-3 are evenly embedded in the lubrication pad grooves 1-16; Figure 3 The exploded view of lubrication pad 1-3 and lubrication pad groove 1-16 is shown in the figure, for the purpose of showing lubrication pad 1-3.

[0070] The replaceability of easily worn parts is optimized by setting wear-resistant plates 1-2.

[0071] like Figure 4 As shown, the push-pull plate assembly 2 includes a push-pull plate 2-1, a slider 2-2, and a pin 2-3;

[0072] One end of the push-pull plate 2-1 is connected to the elongated hole 1-15 of the switch rail connecting iron assembly 1 through the slider 2-2 and the pin 2-3; the horizontal plate 1-14 is embedded between the upper sector plate 2-11 and the lower sector plate 2-12 of the push-pull plate 2-1.

[0073] The pin 2-3 is installed in the cylindrical countersunk hole 2-13 of the push-pull plate 2-1. The slider 2-2 is located in the elongated hole 1-15 of the switch rail connecting iron 1-1. It is installed on the pin 2-3 using its slider through hole 2-18. During installation, the slider 2-2 should be placed into the elongated hole 1-15 in advance.

[0074] like Figure 8 As shown, the connecting iron base assembly 3 includes a connecting iron base 3-1 and a connecting iron base shaft 3-2;

[0075] The connecting iron base 3-1 is provided with a third vertical plate 3-11 at one end and a through hole at the other end;

[0076] The third vertical plate 3-11 is hooked to the second vertical plate 1-13 of the switch rail connecting iron 1-1;

[0077] The other end of the connecting iron base 3-1 is connected to the other end of the push-pull plate 2-1 via the connecting iron base shaft 3-2.

[0078] The push-pull plate 2-1 is connected to the connecting iron seat 3-1 via the connecting iron seat shaft 3-2. The connecting iron seat shaft 3-2 can rotate freely within the second connecting hole 2-16 of the push-pull plate 2-1 and the connecting iron seat 3-1. The connecting iron seat 3-1 and the connecting iron seat shaft 3-2 are made as separate parts to avoid stress and breakage during turnout switching and transition of the switch rail, thus improving the reliability of the device.

[0079] The switch rail connecting iron 1-1, connecting iron seat 3-1, slider 2-2 and pin 2-3 constitute a precise linear mechanism, which can ensure that the locking hook 4 remains stationary while the switch rail connecting iron 1-1 moves precisely in a straight line along the crawling direction of the switch rail 5 in the locked state of the turnout, thereby reducing the impact of the extension and retraction of the switch rail 5 on the external locking fixed on the stock rail 6.

[0080] The turnout hook-type external locking device has a simple structure, is easy to install, and has a reasonable design. It has low wear between parts, long replacement cycle, and low maintenance workload. It has strong adaptability to switch rail expansion and contraction, which helps to maintain the parallelism between the external locking parts, reduce frictional resistance during turnout switching, improve the reliability of turnout switching, and reduce the workload of turnout maintenance. The product also has overall protection considerations, with reserved relevant interfaces to facilitate the later installation of protective equipment.

[0081] In some embodiments, the switch rail connecting iron 1-1 further includes: a side plate 1-18 and a threaded hole 1-19;

[0082] Side plates 1-18 are respectively provided on both sides of the switch rail connecting iron 1-1;

[0083] The side plate 1-18 is provided with a threaded hole 1-19 at the end away from the first vertical plate 1-11.

[0084] In some embodiments, the switch rail connecting iron assembly 1 further includes: bolt assembly 1-4 and protective plate 1-5;

[0085] The protective plate 1-5 is bolted to the threaded hole 1-19 of the side plate 1-18 to prevent foreign objects from falling in and affecting normal movement;

[0086] The bolt assembly 1-4 is installed in the first connecting hole 1-12 of the first upright plate 1-11 and is used to fix the switch rail connecting iron assembly 1 to the switch rail 5.

[0087] In some embodiments, the switch rail connecting iron 1-1 further includes: a drain trough 1-17;

[0088] The sewage trough 1-17 is installed on the horizontal plate 1-14 and is located between the second vertical plate 1-13 and the oblong hole 1-15.

[0089] like Figure 5As shown, in some embodiments, the push-pull plate 2-1 includes a column, an upper sector plate 2-11, and a lower sector plate 2-12;

[0090] One end of the column is connected to an upper sector plate 2-11, and the other end is connected to a lower sector plate 2-12; the upper sector plate 2-11 and the lower sector plate 2-12 are connected by a circular arc surface 2-15.

[0091] The column is provided with a second connecting hole 2-16; the push-pull plate assembly 2 is connected to the connecting iron base shaft 3-2 through the second connecting hole 2-16;

[0092] The upper fan-shaped plate 2-11 has a plurality of cylindrical countersunk holes 2-13; for example, two cylindrical countersunk holes 2-13 are provided that are symmetrical from left to right.

[0093] The lower sector plate 2-12 has several through holes (corresponding to the cylindrical countersunk holes 2-13) and mounting holes 2-14.

[0094] The circles containing the center of the arc surface 2-15, the cylindrical countersunk hole 2-13, and the second connecting hole 2-16 are concentric.

[0095] like Figure 6 As shown, slider 2-2 is a cylinder with a slider through hole 2-18, and slider 2-2 has an elongated oval surface 2-17 around its perimeter;

[0096] In some embodiments, the two sliders 2-2 are respectively slidably disposed in the elongated holes 1-15 of the switch rail connecting iron assembly 1, and are located between the upper sector plate 2-11 and the lower sector plate 2-12;

[0097] The push-pull plate 2-1 is connected to the slider 2-2 via a pin 2-3. Specifically, the pin 2-3 passes through the cylindrical countersunk hole 2-13, the slider 2-2, and the through hole of the lower sector plate 2-12 in sequence and is connected to the nut.

[0098] like Figure 7 As shown, in some embodiments, the push-pull plate assembly 2 further includes: a disc spring seat 2-4;

[0099] The disc spring seat 2-4 includes a stepped surface 2-19, a limiting surface 2-20, and a stepped shaft 2-21 connected in sequence.

[0100] The stepped shaft 2-21 is disposed in the mounting hole 2-14 of the lower sector plate 2-12.

[0101] In some embodiments, the push-pull plate assembly 2 further includes: a first disc spring 2-5;

[0102] The first disc spring 2-5 is sleeved on the stepped shaft 2-21 and is located between the stepped surface 2-19 and the lower sector plate 2-12.

[0103] The first disc spring 2-5 is used to adjust the gap between the tip rail connecting iron 1-1 and the push-pull plate 2-1. It is installed in the stepped shaft 2-21 of the disc spring seat 2-4. The first disc spring 2-5 is located between the disc spring seat 2-4 and the lower sector plate 2-12. The limiting surface 2-20 provided by the disc spring seat 2-4 is used to limit the compression of the first disc spring 2-5 to avoid excessive compression that could cause the first disc spring 2-5 to fail.

[0104] In some embodiments, the connecting iron base assembly 3 further includes: a washer 3-3 and a second disc spring 3-4;

[0105] The connecting iron base shaft 3-2 passes sequentially through the through hole of the connecting iron base 3-1, the washer 3-3, the second connecting hole 2-16 of the push-pull plate 2-1, the washer 3-3, the second disc spring 3-4 and connects to the nut, thereby connecting the connecting iron base assembly 3 to the push-pull plate 2-1.

[0106] To reduce wear and ensure smooth rotation of the push-pull plate 2-1, a washer 3-3 is installed on each of the upper and lower surfaces of the push-pull plate 2-1, and the gap between the push-pull plate 2-1 and the connecting iron base 3-1 is adjusted by the second disc spring 3-4.

[0107] This utility model embodiment also discloses a railway turnout switching device, including the above-mentioned turnout hook-type external locking device.

[0108] Working principle of turnout hook-type external locking device:

[0109] Figure 9 (a) is a schematic diagram of the turnout hook-type external locking device moving to the left side as the switch rail moves; Figure 9 (b) is a schematic diagram of the intermediate position of the turnout hook-type external locking device installation; Figure 9 (c) is a schematic diagram of the turnout hook-type external locking device moving to the right side as the switch rail shifts. For example... Figure 9 (b) shows the initial state of the turnout hook-type external locking device after it is connected to the switch rail 5 and the stock rail 6. When the switch rail 5 moves to the left, it will cause the turnout hook-type external locking device to move to the left (as shown in Figure 6). Figure 9 (a) As shown in the diagram, when switch rail 5 moves to the right, it will cause the turnout hook-type external locking device to move to the right (as shown in the diagram). Figure 9 (c) is shown.

[0110] When the switch rail 5 expands or contracts due to thermal expansion and contraction, the switch rail connecting iron 1-1 moves with the switch rail 5. The slider 2-2 in the elongated hole 1-15 of the switch rail connecting iron 1-1 rotates around the pin 2-3 and slides in the elongated hole 1-15. Meanwhile, the push-pull plate 2-1 only rotates around the center of the second connecting hole 2-16 at its rear end. This is to ensure that the relative position between the external locking parts remains basically unchanged when the switch rail 5 expands or contracts, thereby reducing the turnout switching jamming caused by the expansion or contraction of the switch rail 5.

[0111] When the turnout needs to be switched, the relative positions of the switch rail connecting iron 1-1, push-pull plate 2-1, and connecting iron seat 3-1 remain unchanged. When the switch rail 5 needs to be switched from the repulsive position to the close position, the fan-shaped plate 2-11 on the push-pull plate 2-1 contacts the wear-resistant plate 1-2 on the side of the second vertical plate 1-13 of the switch rail connecting iron 1-1, pushing the switch rail connecting iron 1-1 to move the switch rail 5. When the switch rail 5 needs to be switched from the close position to the repulsive position, the third vertical plate 3-11 at the front end of the connecting iron seat 3-1 contacts the wear-resistant plate 1-2 on the other side of the second vertical plate 1-13, pulling the switch rail connecting iron 1-1 to move the switch rail 5, thereby realizing the normal switching function of the turnout.

[0112] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hook-type outside locking device for a turnout, characterized in that include: The switch rail connecting iron assembly (1), the push-pull plate assembly (2), the connecting iron base assembly (3), and the locking hook (4); The push-pull plate assembly (2) is connected to the switch rail connecting iron assembly (1) and the connecting iron base assembly (3) respectively; The switch rail connecting iron assembly (1) is connected to the connecting iron base assembly (3); The locking hook (4) is connected to the connecting iron base assembly (3); The switch rail connecting iron assembly (1) includes a switch rail connecting iron (1-1), a wear-resistant plate (1-2), and a lubricating pad (1-3); The switch rail connecting iron (1-1) includes a first vertical plate (1-11), a second vertical plate (1-13), a horizontal plate (1-14), and an oblong hole (1-15); The horizontal plate (1-14) is provided with a first vertical plate (1-11) and a second vertical plate (1-13) at intervals; the horizontal plate (1-14) is provided with a plurality of elongated holes (1-15) and a plurality of lubrication pad grooves (1-16); Wear-resistant plates (1-2) are provided on both sides of the second vertical plate (1-13); The lubricating pad (1-3) is disposed in the lubricating pad groove (1-16); The push-pull plate assembly (2) includes a push-pull plate (2-1), a slider (2-2), and a pin (2-3); One end of the push-pull plate (2-1) is connected to the elongated hole (1-15) of the switch rail connecting iron assembly (1) via a slider (2-2) and a pin (2-3); The connecting iron base assembly (3) includes a connecting iron base (3-1) and a connecting iron base shaft (3-2); The connecting iron base (3-1) has a third vertical plate (3-11) at one end and a through hole at the other end; The third vertical plate (3-11) is hooked to the second vertical plate (1-13) of the switch rail connecting iron (1-1); The other end of the connecting iron base (3-1) is connected to the other end of the push-pull plate (2-1) via the connecting iron base shaft (3-2).

2. A switch hook type of outside closure device according to claim 1, characterised in that, The switch rail connecting iron (1-1) also includes: a side plate (1-18) and a threaded hole (1-19); Side plates (1-18) are respectively provided on both sides of the switch rail connecting iron (1-1); The side plate (1-18) has a threaded hole (1-19) at the end away from the first vertical plate (1-11).

3. A switch hook type of outside closure device according to claim 2, characterised in that, The switch rail connecting iron assembly (1) further includes: bolt assembly (1-4) and protective plate (1-5); The protective plate (1-5) is installed on the side plate (1-18); The bolt assembly (1-4) is installed in the first connecting hole (1-12) of the first upright plate (1-11).

4. The turnout hook-type external locking device according to claim 2 or 3, characterized in that, The switch rail connecting iron (1-1) also includes: a drain trough (1-17); The sewage trough (1-17) is installed on the horizontal plate (1-14).

5. The switch hook type outside thrower according to claim 1, wherein The push-pull plate (2-1) includes a column, an upper sector plate (2-11), and a lower sector plate (2-12); One end of the column is connected to an upper sector plate (2-11), and the other end is connected to a lower sector plate (2-12); The column is provided with a second connecting hole (2-16); The upper sector plate (2-11) has several cylindrical countersunk holes (2-13); The lower sector plate (2-12) has several through holes and mounting holes (2-14).

6. A switch hook type of outside closure device according to claim 5, characterised in that, The slider (2-2) is slidably disposed in the elongated hole (1-15) of the switch rail connecting iron assembly (1); The push-pull plate (2-1) is connected to the slider (2-2) via a pin (2-3).

7. The switch hook type outside locking device according to claim 5, wherein The push-pull plate assembly (2) further includes: a disc spring seat (2-4); The disc spring seat (2-4) includes a stepped surface (2-19), a limiting surface (2-20), and a stepped shaft (2-21) connected in sequence; The stepped shaft (2-21) is disposed in the mounting hole (2-14) of the lower sector plate (2-12).

8. A switch hook type of outside closure device according to claim 7, characterised in that, The push-pull plate assembly (2) further includes: a first disc spring (2-5); The first disc spring (2-5) is sleeved on the stepped shaft (2-21).

9. The switch hook type outside thrower according to claim 5, wherein The connecting iron base assembly (3) further includes: a washer (3-3) and a second disc spring (3-4); The connecting iron base shaft (3-2) passes through the through hole of the connecting iron base (3-1), the washer (3-3), the second connecting hole (2-16) of the push-pull plate (2-1), the washer (3-3), the second disc spring (3-4) and is connected to the nut in sequence.

10. Railway switch conversion apparatus, characterized in that Includes the turnout hook-type external locking device as described in any one of claims 1-9.

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