Hidden bolt lock for rail transit and apron board of hidden bolt lock

Abstract

The utility model relates to the technical field of rail transit equipment, in particular to a hidden bolt lock for rail transit and an apron board of the hidden bolt lock. The mounting seat is arranged at the bottom, the linkage device is arranged on the mounting seat, the front lock rod and the rear lock rod are arranged on the two symmetrical sides of the linkage device, two guide blocks are arranged in the middle of the mounting seat, and a front support and a rear support are arranged on the two sides of the mounting seat respectively; the linkage device is sequentially provided with a cover plate, an inner pressure spring, a movable block and a sliding seat from top to bottom; the front lock rod comprises a front rod body, a front buffer sleeve and a front pressure spring; the rear lock rod comprises a rear rod body, a cylindrical pin and a tail compression spring. The utility model further provides a mounting method and a using method of the hidden bolt lock for the apron board and the rail transit. According to the hidden bolt lock for the rail transit, efficient locking and unlocking functions of the hidden bolt lock for the rail transit are achieved, and stable connection between the bolt lock and the apron board body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit equipment, and particularly relates to a hidden bolt lock for rail transit and its skirt board. Background Art

[0002] With the rapid development of maglev train technology, its high efficiency, quietness, and stability characteristics are highly favored. As a key component, the installation and maintenance of the undercarriage skirt board directly affect the train performance and passenger experience. To address existing problems, such as the combined skirt board lock proposed in Chinese Patent CN215621962U, although it improves the opening and closing convenience, it is still troubled by traditional bolt locks: complex structure, large space occupation, easy to damage, and noisy, which does not conform to the concepts of high efficiency, safety, and aesthetics of modern rail transit. The exposed traditional bolt lock damages the appearance, exacerbates environmental erosion, and shortens the service life; the complex structure increases costs, limits production scale, and is difficult to meet the market demand for high efficiency and low cost. Therefore, seeking a more optimized skirt board lock solution has become the focus of the industry. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a hidden bolt lock for rail transit and its skirt board.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A hidden bolt lock for rail transit includes a mounting base at the bottom, a linkage device arranged on the mounting base, and a front lock rod and a rear lock rod arranged symmetrically on both sides of the linkage device, wherein:

[0006] For the mounting base, two guiding blocks are arranged in the middle thereof, and a front support and a rear support are respectively arranged on both sides; the linkage device is limited on the two guiding blocks, and the front lock rod and the rear lock rod are respectively mounted on the front support and the rear support;

[0007] The linkage device is used to lock the bolt lock to prevent the front lock rod and the rear lock rod from moving forward and backward.

[0008] This technical solution realizes the stable locking and unlocking functions of the bolt lock through the mounting base, the linkage device, the front lock rod, and the rear lock rod, ensuring that the bolt lock can still work safely and effectively without being exposed. The hidden bolt lock for rail transit realizes the stable locking of the bolt lock through a precise structure, especially the combination of the internal compression spring, the movable block, and the guiding block in the linkage device, which not only prevents the abnormal movement of the front lock rod and the rear lock rod, but also ensures the high stability of the bolt lock in the locked state; the front lock rod and the rear lock rod are fixed by the set screws at the top of the sliding seat, improving the overall stability of the bolt lock, preventing it from accidentally coming out during use, and enhancing the safety of use;

[0009] In addition, the concealed bolt lock for rail transit proposed above according to the present utility model further has the following additional technical features:

[0010] According to an embodiment of the present utility model, the linkage device is sequentially provided with a cover plate, an inner compression spring, a movable block and a sliding seat from top to bottom; the bottom of the movable block passes through a rectangular hole in the middle of the sliding seat, the inner compression spring is sleeved on the screw rod of the movable block, and the cover plate is fixed on the sliding seat to prevent the compression spring and the movable block from coming out; the compression spring abuts against the movable block, and the rectangular tail end of the movable block contacts the side surface of the guide block.

[0011] In this technical solution, the linkage device forms a locking mechanism capable of generating elastic resistance through the combination of the cover plate, the inner compression spring, the movable block and the sliding seat; the elastic force of the inner compression spring is transmitted to the guide block through the movable block, so as to maintain the stability of the front lock rod and the rear lock rod in the locked state; the guide block not only limits the position of the linkage device, but also prevents the abnormal movement of the front lock rod and the rear lock rod through contact with the movable block; in the locked state, the rectangular tail end of the movable block is in close contact with the side surface of the guide block, preventing the front lock rod and the rear lock rod from moving back and forth, and realizing the locking function of the bolt lock; when unlocking is required, an inner hexagon wrench is used to separate the movable block from the guide block, and at this time, the front lock rod and the rear lock rod slide back and forth under the action of an external force, so as to realize unlocking.

[0012] According to an embodiment of the present utility model, the front lock rod includes a front rod body, a front buffer sleeve and a front compression spring. The front rod body sequentially passes through the front circular hole of the front support seat, is sleeved with the front compression spring and is connected to the front threaded hole of the sliding seat.

[0013] According to an embodiment of the present utility model, the rear lock rod includes a rear rod body, a cylindrical pin and a tail compression spring. The rear rod body sequentially passes through the rear circular hole of the rear support seat, is sleeved with the tail compression spring and is connected to the rear threaded hole of the sliding seat; a cylindrical pin is installed on the rear rod body.

[0014] In this technical solution, the front lock rod and the rear lock rod are respectively connected to the sliding seat through the front compression spring and the tail compression spring. During the unlocking process, the front lock rod and the rear lock rod can slide smoothly and can automatically return to the initial position after unlocking; the presence of the front buffer sleeve and the rear buffer sleeve enhances the stability during the sliding process; the inner compression spring provides an elastic force in the direction of the guide block for the movable block to ensure the stability of the locked state; the front compression spring is used to prevent the front buffer sleeve from coming off the front rod body; the tail compression spring provides a reset force for the rear lock rod and can automatically return to the initial position after unlocking; the whole bolt lock is embedded inside the skirt plate, so that it will not occupy extra space or affect the appearance when not in use, improving the safety of the bolt lock and preventing external damage or misoperation.

[0015] According to one embodiment of the utility model, a hexagonal groove is provided in the middle of the rectangular tail end of the movable block, and the hexagonal groove cooperates with the hexagonal wrench to compress the internal compression spring, disengage the movable block from the guide block, press the wrench without unloading the force and pull the wrench along the direction of the locking rod, so that the front locking rod and the rear locking rod slide back and forth, and release the wrench to complete the locking or unlocking action.

[0016] According to an embodiment of the utility model, a shock-absorbing pad is arranged between the guide block and the sliding seat, and the shock-absorbing pad is used to prevent the lock from making abnormal noise during the sliding process.

[0017] According to an embodiment of the utility model, a shock-absorbing pad is arranged between the guide block and the sliding seat, and the shock-absorbing pad is used to prevent the lock from making abnormal noise during the sliding process.

[0018] This technical solution reduces the noise and vibration generated by the lock during the sliding process by arranging a shock-absorbing pad between the guide block and the sliding seat, thereby improving the user experience.

[0019] According to one embodiment of the utility model, a buffer block is arranged between the sliding seat and the front support. The buffer block is made of POM material, and an anti-slip rubber strip is installed on the upper part of the buffer block to prevent abnormal noise after the sliding seat slides to the front section and is fixed.

[0020] This technical solution adds a buffer block made of POM material and an anti-slip rubber strip between the sliding seat and the front support to prevent the sliding seat from making abnormal noise after sliding to the front end and being fixed, thereby enhancing the silent performance of the latch lock.

[0021] According to an embodiment of the utility model, a switch mark is provided on the sliding seat, which is used to facilitate identification of the locking state when hidden behind the skirt board.

[0022] The technical solution provides a switch mark on the sliding seat, so that the locking state can be easily identified even when the latch lock is hidden inside the skirt board, thereby improving the convenience of use.

[0023] In order to achieve the above-mentioned purpose, the utility model also provides a skirt board.

[0024] A skirt board comprises a skirt board body and a latch lock, wherein the skirt board body is provided with a guide groove for matching with the latch lock, and the latch lock is completely embedded in the skirt board;

[0025] Four latch locks are arranged on each skirt board body, and the movable block of the latch lock automatically pops out from the through hole of the mounting seat to clamp the skirt board body for primary locking; the mounting seat of the latch lock fixes the skirt board body for secondary locking by bolts.

[0026] This technical solution realizes the stable locking and convenient installation of the skirt board, and improves the overall safety and aesthetics of the skirt board. This technical solution realizes the efficient locking and unlocking functions of the hidden latch lock for rail transit, and ensures the stable connection between the latch lock and the skirt board body. Specifically, first use the hexagonal wrench to accurately act on the hexagonal groove of the movable block, and compress the internal compression spring by applying force, thereby causing the movable block to separate from the guide block; while keeping the wrench applying pressure to the movable block, pull the wrench in the direction of the locking rod, this action allows the front locking rod or the rear locking rod to slide back and forth in the sliding seat; as the locking rod slides, the state of the latch lock also changes, thereby completing the locking or unlocking action; after releasing the wrench, the elastic force of the internal compression spring will cause the movable block to automatically reset, re-contact the guide block, and restore the locked state; by providing a rivet screw hole on the lock mounting seat, and using the rivet screw to firmly fix the latch lock in the profile cavity of the skirt body, ensure that the latch lock will not loosen or fall off due to external force during use; the oblong notch opened at the connection between the skirt body and the lock not only facilitates the exposure of the end of the hexagonal screw, but also allows the user to clearly see the switch mark, thereby conveniently performing locking and unlocking operations.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The hidden latch lock achieves stable locking through a precise structure to prevent abnormal movement. The set screw fixing design enhances the overall stability and effectively prevents accidental disengagement, significantly improving the safety and stability of rail transit equipment. The hexagonal wrench is used for quick operation to simplify the locking and unlocking process. At the same time, the embedded design of the latch lock saves space and is beautiful. The switch logo is easy to identify the status, greatly improving the convenience of user operation. Buffer sleeves and shock-absorbing pads are added to reduce sliding noise and vibration. POM buffer blocks and rubber strips prevent abnormal noise, which not only improves the user experience, but also significantly enhances the durability of the latch lock and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a horizontal cross-sectional view of the skirt panel.

[0030] Figure 2 It is a vertical cross-sectional view of the skirt panel.

[0031] Figure 3 It is a stereogram of the utility model.

[0032] Figure 4 It is a disassembled diagram of the utility model.

[0033] Figure 5 It is a structural diagram of the mounting base.

[0034] Figure 6 It is a structural diagram of the activity block.

[0035] Figure 7 It is a schematic structural diagram of the sliding seat.

[0036] Figure 8 It is a schematic diagram of the switch state of the sliding seat.

[0037] In the figure: 1. Mounting seat; 11. Guide block; 12. Front support; 13. Rear support; 2. Linkage device; 21. Cover plate; 22. Inner compression spring; 23. Movable block; 231. Rectangular tail end; 232. Screw rod; 24. Sliding seat; 25. Shock pad; 3. Front locking rod; 31. Front rod body; 32. Front buffer sleeve; 33. Front compression spring; 4. Rear locking rod; 41. Rear rod body; 42. Cylindrical pin; 43. Tail compression spring; 5. Skirt plate body. Specific implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] As Figures 1 to 8 shown, this embodiment provides a hidden bolt lock for rail transit, including a mounting seat 1 at the bottom, a linkage device 2 arranged on the mounting seat 1, and a front locking rod 3 and a rear locking rod 4 arranged on both symmetrical sides of the linkage device 2, wherein:

[0041] As Figure 5 shown, for the mounting seat 1, two guide blocks 11 are arranged in the middle thereof, and a front support 12 and a rear support 13 are respectively arranged on both sides; the linkage device 2 is limited on the two guide blocks 11, and the front locking rod 3 and the rear locking rod 4 are respectively installed on the front support 12 and the rear support 13;

[0042] As Figures 6 to 8 shown, the linkage device 2 is used to lock the bolt lock to prevent the front locking rod 3 and the rear locking rod 4 from moving forward and backward.

[0043] As Figures 1 to 8As shown in the figure, this technical solution realizes the stable locking and unlocking functions of the bolt lock through the mounting base 1, the linkage device 2, the front lock rod 3 and the rear lock rod 4, ensuring that the bolt lock can still work safely and effectively when it does not need to be exposed. This hidden bolt lock for rail transit realizes the stable locking of the bolt lock through a precise structure, especially the combination of the internal compression spring 22, the movable block 23 and the guide block 11 in the linkage device 2, which not only prevents the abnormal movement of the front lock rod 3 and the rear lock rod 4, but also ensures the high stability of the bolt lock in the locked state; the front lock rod 3 and the rear lock rod 4 are fixed by the set screws at the top of the sliding seat 24, improving the overall stability of the bolt lock, preventing it from accidentally coming out during use, and enhancing the safety of use;

[0044] In addition, the hidden bolt lock for rail transit proposed above according to the present invention also has the following additional technical features:

[0045] According to an embodiment of the present invention, the linkage device 2 is provided with a cover plate 21, an internal compression spring 22, a movable block 23 and a sliding seat 24 from top to bottom in sequence; the bottom of the movable block 23 passes through the rectangular hole in the middle of the sliding seat 24, the internal compression spring 22 is sleeved on the screw rod 232 of the movable block 23, and the cover plate 21 is fixed on the sliding seat 24 to prevent the compression spring and the movable block 23 from coming out; the compression spring abuts against the movable block 23, and the rectangular tail end 231 of the movable block 23 contacts the side surface of the guide block 11.

[0046] In this technical solution, the linkage device 2 forms a locking mechanism capable of generating elastic resistance through the combination of the cover plate 21, the internal compression spring 22, the movable block 23 and the sliding seat 24; the elastic force of the internal compression spring 22 is transmitted to the guide block 11 through the movable block 23, so as to maintain the stability of the front lock rod 3 and the rear lock rod 4 in the locked state; the guide block 11 not only limits the position of the linkage device 2, but also prevents the abnormal movement of the front lock rod 3 and the rear lock rod 4 through the contact with the movable block 23; in the locked state, the rectangular tail end 231 of the movable block 23 is in close contact with the side surface of the guide block 11, preventing the front lock rod 3 and the rear lock rod 4 from moving back and forth, and realizing the locking function of the bolt lock; when unlocking is required, use an inner hexagon wrench to disengage the movable block 23 from the guide block 11, and at this time, the front lock rod 3 and the rear lock rod 4 slide back and forth under the action of an external force, so as to realize unlocking.

[0047] According to an embodiment of the present invention, the front lock rod 3 includes a front rod body 31, a front buffer sleeve 32 and a front compression spring 33. The front rod body 31 sequentially passes through the front circular hole of the front support 12, is sleeved with the front compression spring 33 and is connected to the front threaded hole of the sliding seat 24.

[0048] According to an embodiment of the present utility model, the rear lock rod 4 includes a rear rod body 41, a cylindrical pin 42, and a tail compression spring 43. The rear rod body 41 sequentially passes through the rear circular hole of the rear support 13, is sleeved with the tail compression spring 43, and is connected to the rear threaded hole of the sliding seat 24; a cylindrical pin 42 is installed on the rear rod body 41.

[0049] In this technical solution, the front lock rod 3 and the rear lock rod 4 are respectively connected to the sliding seat 24 through the front compression spring 33 and the tail compression spring 43. During the unlocking process, the front lock rod 3 and the rear lock rod 4 can slide smoothly and automatically return to the initial position after unlocking; the presence of the front buffer sleeve 32 and the rear buffer sleeve enhances the stability during the sliding process; the inner compression spring 22 provides an elastic force in the direction of the guide block 11 for the movable block 23 to ensure the stability of the locked state; the front compression spring 33 is used to prevent the front buffer sleeve 32 from disengaging from the front rod body 31; the tail compression spring 43 provides a reset force for the rear lock rod 4 and can automatically return to the initial position after unlocking; it can automatically return to the initial position after unlocking; the whole bolt lock is embedded inside the skirt board, so that it will not occupy extra space or affect the appearance when not in use, improving the safety of the bolt lock and preventing external damage or misoperation.

[0050] According to an embodiment of the present utility model, a hexagon socket groove is provided in the middle of the rectangular tail end 231 of the movable block 23. The hexagon socket groove cooperates with a hexagon wrench to compress the inner compression spring 22, disengage the movable block 23 from the guide block 11, hold the wrench without unloading force, and pull the wrench along the lock rod direction to make the front lock rod 3 and the rear lock rod 4 slide back and forth, and release the wrench to complete the locking or unlocking action.

[0051] According to an embodiment of the present utility model, a shock pad 25 is provided between the guide block 11 and the sliding seat 24. The shock pad 25 is used to prevent abnormal noise during the sliding process of the lock.

[0052] According to an embodiment of the present utility model, a shock pad 25 is provided between the guide block 11 and the sliding seat 24. The shock pad 25 is used to prevent abnormal noise during the sliding process of the lock.

[0053] This technical solution reduces the noise and vibration generated during the sliding process of the lock by providing a shock pad 25 between the guide block 11 and the sliding seat 24, improving the user experience.

[0054] According to an embodiment of the present utility model, a buffer block is provided between the sliding seat 24 and the front support 12. The buffer block is made of POM material, and a rubber strip for preventing disengagement is installed on the upper part of the buffer block to prevent abnormal noise after the sliding seat 24 slides to the front section and is fixed.

[0055] This technical solution adds a buffer block made of POM material and an anti-slip rubber strip between the sliding seat 24 and the front support 12 to prevent the sliding seat 24 from making abnormal noise after sliding to the front end and fixing, thereby enhancing the silent performance of the latch lock.

[0056] According to an embodiment of the present invention, a switch mark is provided on the sliding seat 24 for facilitating identification of the locking state when the sliding seat 24 is hidden behind the skirt board.

[0057] The technical solution provides a switch mark on the sliding seat 24, so that the locking state can be easily identified even when the latch lock is hidden inside the skirt board, thereby improving the convenience of use.

[0058] The installation process of the utility model is as follows: first, install the front buffer sleeve 32, the plastic sleeve and the front locking rod 3 on the front mounting seat 1, and tighten them; then, the rear locking rod 4 with the tail compression spring 43 is inserted into the rear mounting seat 1 and tightened; the nylon sleeve is used for the automatic rebound of the rear locking rod 4; the front and rear sliding rods are provided with flat notches, and the top of the sliding seat 24 is fixed with set screws to prevent it from falling out; after the movable block 23 is assembled with the compression spring, the cover plate 21 is fixed to the sliding seat 24 to ensure that the internal compression spring 22 and the movable block 23 do not fall out; when there is no external force, the internal compression spring 22 pushes the movable block 23 to be in close contact with the guide block 11 to achieve locking; this solution is efficient and stable, enhances safety and stability, and ensures that the latch lock is continuously and effectively locked.

[0059] Example 2

[0060] Based on Example 1, Figures 1 to 8 As shown, this embodiment provides a skirt board, including a skirt board body 5 and a latch lock, the skirt board body 5 is provided with a guide groove for matching the latch lock, and the latch lock is completely embedded in the skirt board;

[0061] Four latch locks are arranged on each skirt board body 5, and the movable block 23 of the latch lock automatically pops out from the through hole of the mounting seat 1 to clamp the skirt board body for primary locking; the mounting seat 1 of the latch lock fixes the skirt board body for secondary locking by bolts.

[0062] This technical solution realizes the stable locking and convenient installation of the skirt board, improving the overall safety and aesthetics of the skirt board. This technical solution realizes the efficient locking and unlocking functions of the hidden bolt lock for rail transit, and ensures the stable connection between the bolt lock and the skirt board body 5. Specifically, first, use an Allen wrench to precisely act on the Allen key groove of the movable block 23. By applying force, the internal compression spring 22 is compressed, and then the movable block 23 is separated from the guide block 11; while maintaining the pressure applied by the wrench to the movable block 23, pull the wrench along the direction of the lock rod. This action enables the front lock rod 3 or the rear lock rod 4 to slide back and forth within the sliding seat 24; as the lock rod slides, the state of the bolt lock also changes accordingly, thus completing the locking or unlocking action; after releasing the wrench, the elastic force of the internal compression spring 22 will cause the movable block 23 to automatically reset and come into contact with the guide block 11 again, restoring the locked state; by setting rivet screw holes on the lock mounting seat 1 and using rivet screws to firmly fix the bolt lock in the profile cavity of the skirt board body 5, it is ensured that the bolt lock will not loosen or fall off due to external forces during use; the oblong notch opened at the connection between the skirt board body 5 and the lock not only facilitates the exposure of the end of the Allen screw, but also enables the user to clearly see the switch mark, thus facilitating the locking and unlocking operations.

[0063] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A hidden latch lock for rail transit, characterized in that: The invention comprises a mounting seat (1) at the bottom, a linkage device (2) arranged on the mounting seat (1), and a front locking rod (3) and a rear locking rod (4) arranged on two symmetrical sides of the linkage device (2), wherein: A mounting seat (1) is provided with two guide blocks (11) in the middle, and a front support (12) and a rear support (13) are provided on both sides; a linkage device (2) is limited on the two guide blocks (11), and a front locking rod (3) and a rear locking rod (4) are respectively installed on the front support (12) and the rear support (13); The linkage device (2) is used to lock the latch lock to prevent the front locking rod (3) and the rear locking rod (4) from moving forward and backward.

2. The hidden bolt lock for rail transit as claimed in claim 1, characterized in that: The linkage device (2) is provided with a cover plate (21), an internal compression spring (22), a movable block (23) and a sliding seat (24) in order from top to bottom; the bottom of the movable block (23) passes through a rectangular hole in the middle of the sliding seat (24), the internal compression spring (22) is inserted into a screw rod (232) of the movable block (23), and the cover plate (21) is fixed on the sliding seat (24) to prevent the compression spring and the movable block (23) from falling out; the compression spring presses against the movable block (23), and the rectangular tail end (231) of the movable block (23) contacts the side of the guide block (11).

3. The hidden bolt lock for rail transit as claimed in claim 2, characterized in that: The front locking rod (3) comprises a front rod body (31), a front buffer sleeve (32) and a front compression spring (33); the front rod body (31) is sequentially inserted into the front circular hole of the front support (12), the front compression spring (33) is inserted thereinto and connected to the front threaded hole of the sliding seat (24).

4. The hidden bolt lock for rail transit as claimed in claim 2, characterized in that: The rear locking rod (4) comprises a rear rod body (41), a cylindrical pin (42) and a tail compression spring (43); the rear rod body (41) is sequentially inserted into the rear end circular hole of the rear support (13), the tail compression spring (43) is inserted and connected to the rear threaded hole of the sliding seat (24); the rear rod body (41) is installed with a cylindrical pin (42).

5. The hidden latch lock for rail transit as claimed in claim 2, characterized in that: A hexagonal groove is provided in the middle of the rectangular tail end (231) of the movable block (23), and the hexagonal groove cooperates with the hexagonal wrench to compress the internal pressure spring (22), disengage the movable block (23) from the guide block (11), press against the wrench without unloading the force and pull the wrench along the locking rod direction, so that the front locking rod (3) and the rear locking rod (4) slide forward and backward, and release the wrench to complete the locking or unlocking action.

6. The hidden bolt lock for rail transit as claimed in claim 2, characterized in that: A shock-absorbing pad (25) is arranged between the guide block (11) and the sliding seat (24), and the shock-absorbing pad (25) is used to prevent the lock from making abnormal noise during the sliding process.

7. The hidden bolt lock for rail transit as claimed in claim 6, characterized in that: A buffer block is arranged between the sliding seat (24) and the front support (12). The buffer block is made of POM material, and an anti-slip rubber strip is installed on the upper part of the buffer block to prevent abnormal noise after the sliding seat (24) slides to the front section and is fixed.

8. The hidden bolt lock for rail transit as claimed in claim 7, characterized in that: The sliding seat (24) is provided with a switch mark for facilitating identification of a locking state when hidden behind the skirt board.

9. A skirt board, using the hidden latch lock for rail transit as claimed in any one of claims 1 to 8, characterized in that: It comprises a skirt board body (5) and a latch lock, wherein the skirt board body (5) is provided with a guide groove for matching the latch lock, and the latch lock is completely embedded in the skirt board; Four latch locks are arranged on each skirt board body (5); a movable block (23) of the latch lock automatically pops out from a through hole of the mounting seat (1) to clamp the skirt board body for primary locking; the mounting seat (1) of the latch lock fixes the skirt board body for secondary locking via bolts.

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