A three-point link door lock device suitable for a side door of a cab of a railway vehicle

Abstract

The application discloses a three-point connecting rod door lock device of a side door of a driver's cabin of a railway vehicle, one end of a main lock assembly is connected with a lower auxiliary lock assembly through a lower pull rod, and the other end of the main lock assembly is connected with an upper auxiliary lock assembly through an upper pull rod; when the door lock is locked, two-step operation is performed, the main lock assembly is locked first, and then the upper and lower auxiliary locks are locked; when the door lock is unlocked, a main handle or a main unlocking shaft lock core of the main lock is operated to simultaneously unlock the main lock, the upper auxiliary lock and the lower auxiliary lock, and three-lock linkage unlocking is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of installation of side door lock of driver's cab of rail transit train, and particularly relates to a three-point link door lock device suitable for side door of driver's cab of rail vehicle. BACKGROUND

[0002] The intercity rail vehicle is fast, and the hinge door lock of the driver's cab is usually provided with a three-link lock, including a main lock, an upper auxiliary lock and a lower auxiliary lock. At the main lock, an inner side is provided with a main handle to facilitate opening the door from inside the vehicle, and an outer side is provided with a recessed four-corner lock core, which is opened by a four-corner key. Because the door leaf of the intercity driver's cab is thick and heavy, when the door is closed, the lock tongue of the main lock, the lock tongue of the upper auxiliary lock and the lock tongue of the lower auxiliary lock all hit the door frame lock at the same time, and the closing impact force is large. The rebound force of the sealing rubber strip is also relatively large. If the force is small, the door may not be closed. The phenomenon that the female driver cannot close the door with small force often occurs. After the door leaf is locked, the lock tongue of the main lock, the lock tongue of the upper auxiliary lock and the lock tongue of the lower auxiliary lock all overlap the lock catch, which causes large opening resistance when the door is opened and unlocked. The driver uses the four-corner key to turn the recessed four-corner lock core to open the door leaf of the three-link lock from the outside of the vehicle. The problem of large unlocking force leading to wear of the four-corner lock core often occurs. SUMMARY

[0003] The purpose of the present application is to provide a three-point link door lock device suitable for side door of driver's cab of rail vehicle, which can realize step-by-step locking of the main lock and the upper and lower auxiliary locks, and three-link linkage unlocking of the main lock and the upper and lower auxiliary locks.

[0004] Technical scheme: The application comprises a main lock assembly, an upper auxiliary lock assembly, a lower auxiliary lock assembly, an upper pull rod and a lower pull rod; one end of the main lock assembly is connected with the lower auxiliary lock assembly through the lower pull rod, and the other end of the main lock assembly is connected with the upper auxiliary lock assembly through the upper pull rod; the main lock assembly comprises a main lock body, an inner lock body and an outer lock body installed on both sides of the main lock body; the main lock body comprises a main lock box, a main lock and a safety lock installed in the main lock box; the safety lock limits the main lock; the main lock comprises a main lock bolt, a first compression spring, an unlocking cam and a rotating disc assembly; a limiting boss is arranged in the main lock box, an inclined surface is arranged on the unlocking cam, and a limiting notch is arranged on the rotating disc assembly; the limiting boss is used for limiting the rotation of the unlocking cam and the rotating disc assembly; the first compression spring is arranged in the main lock bolt; the unlocking cam is sleeved on an unlocking cam adapter installed in the main lock box; the rotating disc assembly is sleeved on a rotating disc adapter installed in the main lock box; the unlocking cam adapter and the rotating disc adapter are coaxially connected; a first special-shaped arc is arranged in the unlocking cam hole; a first arc notch is arranged outside the unlocking cam adapter shaft; when one end of the first special-shaped arc of the unlocking cam and one end of the first arc notch of the unlocking cam adapter shaft are in contact, the other end of the first special-shaped arc and the other end of the first arc notch form an empty stroke with a fixed angle; a second special-shaped arc is arranged in the rotating disc assembly hole; a second arc notch is arranged outside the rotating disc adapter shaft; when one end of the second special-shaped arc of the rotating disc assembly and one end of the second arc notch of the rotating disc adapter shaft are in contact, the other end of the second arc notch and the other end of the second special-shaped arc form an empty stroke with a fixed angle; the first special-shaped arc and the second special-shaped arc are fixedly arranged at a fixed angle in space; the first arc notch and the second arc notch are fixedly arranged at a fixed angle in space; the rotating disc assembly is provided with a main lock upper pull plate and a main lock lower pull plate; the main lock upper pull plate passes through the main lock box and is connected with the upper pull rod; and the main lock lower pull plate passes through the main lock box and is connected with the lower pull rod.

[0005] The safety lock comprises a safety lock bolt, a safety dial and a first torsion spring; the safety dial is located below the unlocking cam; a convex arc is arranged on the safety dial; a concave arc is arranged on the unlocking cam; the convex arc of the safety dial is used for limiting the concave arc of the unlocking cam; one pin of the first torsion spring is installed on the main lock box, and the other pin of the first torsion spring is installed on the safety dial; when the safety lock is operated, the safety knob or the safety shaft lock core is rotated in the vehicle or outside the vehicle according to the mark and the arrow direction, the safety lock bolt is driven to retract, the safety lock is unlocked, and at this time, the safety dial is separated from the unlocking cam.

[0006] The inner lock body is provided with a main handle on one side and a main unlocking shaft lock core on the other side, the main handle and the main unlocking shaft lock core are coaxially connected, and the initial position of the main handle is horizontal state; the shaft of the main unlocking shaft lock core is sleeved with a bidirectional torsion spring and a limiting disc, the main handle, the main unlocking shaft lock core, the bidirectional torsion spring and the limiting disc sleeved on the shaft are connected into an integral body by using a first fastener; the limiting disc is symmetrically provided with a first limiting pin and a second limiting pin outside, which are used for limiting the rotation angle of the limiting disc; rotating the main handle clockwise by a certain angle, releasing the main handle, under the restoring force of the bidirectional torsion spring, the main handle is restored to the horizontal position again; rotating the main handle counterclockwise by a certain angle, releasing the main handle, under the restoring force of the bidirectional torsion spring, the main handle is restored to the horizontal position again.

[0007] The main unlocking shaft lock core of the inner lock body passes through the unlocking cam adapter sleeve and the rotating disc adapter sleeve of the main lock body and is inserted into the main lock hole of the outer lock body; when the main handle is rotated, the main unlocking shaft lock core is rotated, and the main unlocking shaft lock core drives the unlocking cam and the rotating disc assembly to rotate; the inner lock body is provided with a safety knob, and the safety knob is inserted into the safety dial of the main lock body; the outer lock body is provided with a safety lock core, and the safety lock core is inserted into the safety dial of the main lock body; the main unlocking shaft lock core, the safety knob and the safety lock core integrate the main lock body, the inner lock body and the outer lock body.

[0008] The upper sub-lock assembly includes an upper sub-lock body and an upper sub-lock tongue, the upper sub-lock body includes a cam block and a second torsion spring; the cam block is provided with an upper sub-lock pull plate; one pin of the second torsion spring is mounted on the upper sub-lock body, and the other pin is mounted on the cam block, and the second torsion spring is used to maintain the state of the upper sub-lock tongue extending and retracting. The upper sub-lock assembly and the lower sub-lock assembly have the same structure.

[0009] The lower sub-lock assembly is connected with a lower pull rod through a lower sub-lock pull plate and a second fastener; the upper sub-lock assembly is connected with an upper pull rod through an upper sub-lock pull plate and a first fastener, so that the main lock assembly, the upper sub-lock assembly and the lower sub-lock assembly are integrally connected.

[0010] The implementation process of the scheme is as follows: when the side door of the driver's room of the rail vehicle is opened, the safety lock is unlocked by rotating the safety knob in the vehicle or the safety lock core outside the vehicle according to the mark and arrow, driving the safety lock tongue to retract, and realizing the unlocking of the safety lock; then, the main lock is unlocked by pressing and rotating the main handle in the vehicle or the main unlocking shaft lock core outside the vehicle, driving the main lock tongue to retract, and realizing the unlocking of the main lock, at this time, the rotating disc assembly in the main lock body rotates synchronously, pulls the upper pull rod and the lower pull rod, drives the upper auxiliary lock tongue and the lower auxiliary lock tongue to retract, and realizes the unlocking of the upper auxiliary lock assembly and the lower auxiliary lock assembly; after the synchronous unlocking of the main lock assembly, the upper auxiliary lock assembly and the lower auxiliary lock assembly, the main handle or the main unlocking shaft lock core is released, and under the restoring force of the bidirectional torsional spring and the first compression spring, the main handle and the main unlocking shaft lock core can return to the initial horizontal state, and the main lock tongue automatically extends; that is, the three-lock linkage unlocking function of the main lock assembly, the upper auxiliary lock assembly and the lower auxiliary lock assembly is realized.

[0011] When the side door of the driver's room of the rail vehicle is closed, the door leaf is closed by pulling the door handle, the main lock tongue hits the door lock stop, and then the main lock tongue automatically retracts and extends when entering the lock stop, realizing the locking of the main lock assembly; then, the main handle is rotated in the opposite direction in the vehicle or the main unlocking shaft lock core is rotated in the opposite direction outside the vehicle, at this time, the rotating disc assembly in the main lock body rotates synchronously, touches the upper pull rod and the lower pull rod, drives the upper auxiliary lock tongue and the lower auxiliary lock tongue to extend, and realizes the locking of the upper auxiliary lock assembly and the lower auxiliary lock assembly; then, the safety lock is locked by rotating the safety knob in the vehicle or the safety lock core outside the vehicle according to the mark and arrow, driving the safety lock tongue to extend, and realizing the locking of the safety lock; that is, the step-by-step locking function of the main lock assembly being locked first and the upper auxiliary lock assembly and the lower auxiliary lock assembly being locked later is realized.

[0012] The technical scheme of the present application has the following advantages compared with the prior art: (1) The door lock is provided with a main lock, an upper auxiliary lock and a lower auxiliary lock, and when the door lock is locked, two-step operation is performed, the main lock is locked first, and then the upper and lower auxiliary locks are locked; when the door lock is unlocked, the main handle or the main unlocking shaft lock core of the main lock simultaneously unlocks the main lock, the upper auxiliary lock and the lower auxiliary lock, realizing three-lock linkage unlocking; the problem of large closing force and difficult unlocking outside for the three-linkage door lock of the driver's room of the current intercity vehicle is solved;

[0013] (2) The door lock is provided with a bidirectional torsional spring and a limiting structure, realizing the function that the main handle can rotate in two directions, and under the action of the bidirectional torsional spring, the main handle can automatically return to the horizontal state after rotating in two directions;

[0014] (3) The door lock is ingeniously provided with a rotating idle stroke in structure, realizing the functions of step-by-step locking of the main lock and the upper and lower auxiliary locks and three-lock linkage unlocking of the main lock and the upper and lower auxiliary locks. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The overall structure diagram of the present application.

[0016] Figure 2 It is a structure diagram of the main lock assembly.

[0017] Figure 3 A cross-sectional view of the main lock component;

[0018] Figure 4 A schematic diagram of the main handle of the inner lock body in a horizontal position.

[0019] Figure 5 A schematic diagram of the internal lock body's main handle in the raised (counterclockwise rotation) state;

[0020] Figure 6 A schematic diagram of the internal lock body's main handle in the pressed-down (clockwise rotation) state;

[0021] Figure 7 A schematic diagram of the main lock body structure;

[0022] Figure 8 A schematic diagram of the internal structure of the main lock body when the main lock is locked and the upper and lower auxiliary locks are not locked.

[0023] Figure 9 A schematic diagram of the internal structure of the main lock body when the main lock is locked and the upper and lower auxiliary locks are locked (the main handle remains in the raised position);

[0024] Figure 10 A schematic diagram of the internal structure of the main lock body when the main lock and the upper and lower auxiliary locks are locked (the main handle is in a horizontal position);

[0025] Figure 11 A schematic diagram of the internal structure of the main lock body when the main lock and the upper and lower auxiliary locks are unlocked in a coordinated manner;

[0026] Figure 12 This is a schematic diagram of the external lock body structure;

[0027] Figure 13 This is a schematic diagram of the upper auxiliary lock assembly. Detailed Implementation

[0028] The technical solution of the present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0029] like Figure 1 As shown, the three-point linkage door lock device of the present invention includes a main lock assembly 1, an upper auxiliary lock assembly 2, a lower auxiliary lock assembly 3, an upper pull rod 4, and a lower pull rod 5. One end of the main lock assembly 1 is connected to the lower auxiliary lock assembly 3 via the lower pull rod 5, and the other end of the main lock assembly 1 is connected to the upper auxiliary lock assembly 2 via the upper pull rod 4. Specifically, the lower auxiliary lock assembly 3 is connected to the lower pull rod 5 via a lower auxiliary lock pull plate 9 and a second fastener 11; the upper auxiliary lock assembly 2 is connected to the upper pull rod 4 via an upper auxiliary lock pull plate 8 and a first fastener 10. During installation, the main lock assembly 1 is located in the middle of the front of the door leaf, the upper auxiliary lock assembly is located at the upper part of the front, and the lower auxiliary lock assembly is located at the lower part of the front, satisfying the modular design requirements.

[0030] like Figure 2 , Figure 7 As shown, the main lock assembly 1 includes a main lock body 13, an inner lock body 12, and an outer lock body 14, wherein the inner lock body 12 and the outer lock body 14 are installed on both sides of the main lock body 13. The main lock body 13 includes a main lock box 25, which houses the main lock and a safety lock. The safety lock is used to limit the main lock. The main lock body 13 is fixedly installed using a third fastener 16. The main lock includes a main lock tongue 26, a first compression spring 33, an unlocking cam 29, and a rotating disk assembly 31. A limiting boss 251 is provided in the main lock box 25, an inclined surface 292 is provided in the unlocking cam 29, and a limiting notch 312 is provided in the rotating disk assembly 31. The limiting boss 251 is used to limit the rotation of the unlocking cam 29 and the rotating disk assembly 31. The first compression spring 33 is located inside the main lock tongue 26. The unlocking cam 29 is sleeved on the unlocking cam adapter sleeve 30, which is installed inside the main lock box 25. The rotating disk assembly 31 is sleeved on the rotating disk adapter sleeve 32, which is installed inside the main lock box 25. The unlocking cam adapter sleeve 30 and the rotating disk adapter sleeve 32 are coaxially connected.

[0031] A first irregular arc 291 is formed inside the hole of the unlocking cam 29, and a first arc notch 301 is formed outside the shaft of the unlocking cam adapter sleeve 30. A first square hole 302 is formed inside the shaft. When one end of the first irregular arc 291 of the unlocking cam 29 contacts one end of the first arc notch 301 of the unlocking cam adapter sleeve 30, a 45° free stroke is formed between the other end of the first irregular arc 291 and the other end of the first arc notch 301. A second irregular arc 311 is formed inside the hole of the rotating disk assembly 31, and the rotating disk adapter sleeve 3... A second arc notch 321 is opened on the outer side of the 2-axis, and a second square hole 322 is opened on the inner side. When one end of the second irregular arc 311 of the rotating disk assembly 31 contacts one end of the second arc notch 321 of the rotating disk adapter sleeve 32, the other end of the second arc notch 321 forms a 45° free stroke with the other end of the second irregular arc 311; the first irregular arc 291 and the second irregular arc 311 are spatially misaligned by 45°; the first arc notch 301 and the second arc notch 321 are spatially misaligned by 45°.

[0032] Turning the main handle 18 downwards from inside the vehicle or turning the main unlocking shaft lock cylinder 19 downwards from outside the vehicle causes the unlocking cam 29 to rotate synchronously, driving the main lock tongue 26 to retract and unlocking the main lock. When the main handle 18 is released, the main lock tongue 26 automatically extends under the restoring force of the first pressure spring 33, meaning the main lock has a self-resetting function.

[0033] The rotating disk assembly 31 is equipped with a main lock upper pull plate 6 and a main lock lower pull plate 7. The main lock upper pull plate 6 passes through the main lock box 25 and is connected to the upper pull rod 4, and the main lock lower pull plate 7 passes through the main lock box 25 and is connected to the lower pull rod 5. When the rotating disk assembly 31 rotates, the main lock upper pull plate 6 and the main lock lower pull plate 7 are pulled, thereby realizing the action of the upper auxiliary lock assembly 2 and the lower auxiliary lock assembly 3.

[0034] The safety lock includes a safety bolt 27, a safety dial 28, and a first torsion spring 34. The safety dial 28 is located below the unlocking cam 29. The specific implementation of the safety lock limiting the main lock is as follows: a convex arc is provided on the safety dial 28, and a concave arc is provided on the unlocking cam 29. The convex arc of the safety dial 28 is used to limit the concave arc of the unlocking cam 29. One pin of the first torsion spring 34 is installed on the main lock box 25, and the other pin is installed on the safety dial 28. According to the markings and arrow directions, rotating the safety knob 24 inside the vehicle or rotating the safety cylinder 36 outside the vehicle drives the safety bolt 27 to retract, thereby unlocking the safety lock. At this time, the convex arc of the safety dial 28 disengages from the concave arc of the unlocking cam 29. Rotating the safety knob 24 inside the vehicle or rotating the safety cylinder 36 with a key outside the vehicle rotates the safety dial 28 and drives the safety bolt 27 to extend, thereby locking the safety lock.

[0035] like Figures 8-11 As shown, under the action of external force, the main lock tongue 26 hits the door frame lock stop, and the main lock tongue 26 retracts. When the main lock tongue 26 enters the door frame lock stop, under the restoring force of the first compression spring (33), the main lock tongue 26 extends. At this time, the idle stroke 45° formed by the unlocking cam 29 and the unlocking cam adapter sleeve 30 is at point A, and the idle stroke 45° formed by the rotating disk assembly 31 and the rotating disk adapter sleeve 32 is at point B. At this time, the main lock is locked, and the upper and lower auxiliary locks are not locked.

[0036] When the main unlocking shaft lock cylinder 19 rotates under the action of external force, the main unlocking shaft lock cylinder 19 synchronously drives the unlocking cam adapter sleeve 30, the rotating disk adapter sleeve 32 and the rotating disk assembly 31. The unlocking cam 29 remains stationary due to the empty stroke at point A, and the main lock remains locked. The rotating disk assembly 31 synchronously touches the upper pull rod 4 and the lower pull rod 5, driving the upper auxiliary lock tongue 38 and the lower auxiliary lock tongue to extend, thereby locking the upper and lower auxiliary lock assemblies. At this time, the empty stroke of 45° formed by the unlocking cam 29 and the unlocking cam adapter sleeve 30 is at point C, and the empty stroke of 45° formed by the rotating disk assembly 31 and the rotating disk adapter sleeve 32 is at point D.

[0037] At this point, the external force is released, and the main handle 18 is released. Under the restoring force of the bidirectional torsion spring 23, the main handle 18 returns to a horizontal state. The unlocking cam 29 and the unlocking cam adapter sleeve 30 return synchronously. At this time, the 45° free travel formed by the unlocking cam 29 and the unlocking cam adapter sleeve 30 is at point A, and the 45° free travel formed by the rotating disk assembly 31 and the rotating disk adapter sleeve 32 is at point E. The above steps complete the function of locking the main lock first, followed by locking the upper and lower auxiliary locks, and the door opens.

[0038] When the 45° free travel formed by the unlocking cam 29 and the unlocking cam adapter sleeve 30 is at point A, and the 45° free travel formed by the rotating disk assembly 31 and the rotating disk adapter sleeve 32 is at point E; when the main unlocking shaft lock cylinder 19 rotates under the action of external force, the main unlocking shaft lock cylinder 19 synchronously drives the unlocking cam 29, the unlocking cam adapter sleeve 30, the rotating disk adapter sleeve 32, and the rotating disk assembly 31; the unlocking cam 29 synchronously drives the main lock tongue 26 to retract, realizing the unlocking of the main lock; the rotating disk assembly 31 synchronously drives the upper pull rod 4 and the lower pull rod 5, driving the upper auxiliary lock tongue 38 and the lower auxiliary lock tongue to retract, realizing the unlocking of the upper and lower auxiliary lock assemblies; at this time, the 45° free travel formed by the unlocking cam 29 and the unlocking cam adapter sleeve 30 is at point F, and the 45° free travel formed by the rotating disk assembly 31 and the rotating disk adapter sleeve 32 is at point G;

[0039] At this point, the external force is released and the main handle 18 is released. Under the restoring force of the bidirectional torsion spring 23, the main handle 18 returns to a horizontal state. The unlocking cam adapter sleeve 30 and the rotating disk adapter sleeve 32 return synchronously. The unlocking cam 29 returns synchronously with the unlocking cam adapter sleeve 30 under the restoring force of the first compression spring of the main lock tongue 26. The main lock tongue 26 extends, while the rotating disk assembly 31 remains stationary because it has a free travel of G with the unlocking cam adapter sleeve 30. That is, the lock tongues of the upper and lower auxiliary locks remain retracted.

[0040] like Figures 2-6 ,and Figure 12As shown, the inner lock body 12 includes a main unlocking shaft lock cylinder 19. A square shaft 191 is formed on the main unlocking shaft lock cylinder 19, into which a first square hole 302 of the unlocking cam adapter sleeve 30 and a second square hole 322 of the rotating disk adapter sleeve 32 are inserted. A main handle 18 is provided on one side of the inner lock body 12, and the main unlocking shaft lock cylinder 19 is provided on the other side. The main handle 18 and the main unlocking shaft lock cylinder 19 are coaxially connected, and the initial position of the main handle 18 is set to a horizontal state. A bidirectional torsion spring 23 and a limiting disc 20 are sleeved on the shaft of the main unlocking shaft lock cylinder 19. A first fastener 42 connects the main handle 18, the main unlocking shaft lock cylinder 19, the bidirectional torsion spring 23, and the limiting disc 20 into a single unit. A first limiting pin 21 and a second limiting pin 22 are symmetrically arranged outside the limiting disc 20 to limit the rotation angle of the limiting disc 20. The main handle 18 is initially in a horizontal position. When the main handle 18 is rotated clockwise by a certain angle and then released, the main handle 18 returns to the horizontal position under the restoring force of the bidirectional torsion spring 23. When the main handle 18 is rotated counterclockwise by a certain angle and then released, the main handle 18 returns to the horizontal position under the restoring force of the bidirectional torsion spring 23.

[0041] The main unlocking shaft lock cylinder 19 of the inner lock body 12 passes through the unlocking cam adapter sleeve 30 and the rotating disk adapter sleeve 32 of the main lock body 13 and is inserted into the main lock hole 141 of the outer lock body 14. When the main handle 18 is rotated, the main unlocking shaft lock cylinder 19 rotates accordingly, driving the unlocking cam 29 and the rotating disk assembly 31 to rotate. The inner lock body 12 is equipped with a safety knob 24, which is inserted into the safety dial 28 of the main lock body 13. The outer lock body 14 includes an outer lock plate 35 and a safety lock cylinder 36. The safety lock cylinder 36 is installed on the side of the outer lock plate 35 and is inserted into the safety dial 28 of the main lock body 13. The main unlocking shaft lock cylinder 19, the safety knob 24, and the safety lock cylinder 36 integrate the main lock body 13, the inner lock body 12, and the outer lock body 14 into one unit. The inner lock body 12 is fixedly installed using a second fastener 15.

[0042] like Figure 13 As shown, the upper auxiliary lock assembly 2 includes an upper auxiliary lock body 37 and an upper auxiliary lock tongue 38. The upper auxiliary lock body 37 includes a cam lever 39, on which an upper auxiliary lock pull plate 8 is mounted. One pin of a second torsion spring 40 is mounted on the upper auxiliary lock body 37, and the other pin is mounted on the cam lever 39. The second torsion spring 40 is used to maintain the extended and retracted state of the upper auxiliary lock tongue 38. The upper auxiliary lock assembly 2 and the lower auxiliary lock assembly 3 have the same structure. Both the upper auxiliary lock assembly 2 and the lower auxiliary lock assembly 3 are equipped with cam levers 39 to realize the extension and retraction of the upper and lower auxiliary lock tongues. The upper auxiliary lock assembly 2 is fixedly installed using a fourth fastener 41.

[0043] When the driver's cab side door of the rail vehicle is opened, the safety knob 24 is turned inside the vehicle according to the markings and arrows, or the safety lock cylinder 36 is turned outside the vehicle using the key, which drives the safety bolt 27 to retract, thus unlocking the safety lock. Then, the main handle 18 is turned downwards inside the vehicle, or the main unlocking shaft lock cylinder 19 is turned downwards outside the vehicle, which drives the main lock bolt 26 to retract, thus unlocking the main lock. At this time, the rotating disk assembly 31 inside the main lock body 13 rotates synchronously, pulling the upper pull rod 4 and the lower pull rod 5, which drives the upper auxiliary bolt 38 and the lower auxiliary lock assembly. When the bolt of component 3 retracts, the upper auxiliary lock component 2 and the lower auxiliary lock component 3 are unlocked simultaneously. After the main lock component 1, the upper auxiliary lock component 2 and the lower auxiliary lock component 3 are unlocked simultaneously, the main handle 18 or the main unlocking shaft lock cylinder 19 is released. Under the restoring force of the bidirectional torsion spring 23 and the first compression spring 33, the main handle 18 and the main unlocking shaft lock cylinder 19 can return to their initial horizontal state, and the main lock bolt 26 automatically extends. Thus, the three-lock linkage unlocking function of the main lock component 1, the upper auxiliary lock component 2 and the lower auxiliary lock component 3 is realized.

[0044] When the side door of the driver's cab of the rail vehicle is closed, the door leaf handle is pulled to close the door. After the main lock tongue 26 hits the door leaf lock block, the main lock tongue 26 automatically retracts. When it enters the lock block, it automatically extends to lock the main lock assembly 1. Then, the main handle 18 is lifted and rotated in the opposite direction inside the vehicle or the main unlocking shaft lock cylinder 19 is lifted and rotated in the opposite direction outside the vehicle. At this time, the rotating disk assembly 31 inside the main lock body 13 rotates synchronously, triggering the upper pull rod 4 and the lower pull rod 5, driving the upper auxiliary lock tongue 38 and the lower auxiliary lock assembly 3 to extend, thus locking the upper auxiliary lock assembly 2 and the lower auxiliary lock assembly 3. Then, according to the markings and arrows, the safety knob 24 is turned inside the vehicle or the safety lock cylinder 36 is turned with the key outside the vehicle to drive the safety lock tongue 27 to extend, thus locking the safety lock. That is, the step-locking function of locking the main lock assembly 1 first and then locking the upper auxiliary lock assembly 2 and the lower auxiliary lock assembly 3 is realized.

Claims

1. A three-point linkage door lock device suitable for the side door of the driver's cab of a rail vehicle, characterized in that: It includes a main lock assembly (1), an upper auxiliary lock assembly (2), a lower auxiliary lock assembly (3), an upper pull rod (4), and a lower pull rod (5); one end of the main lock assembly (1) is connected to the lower auxiliary lock assembly (3) via the lower pull rod (5), and the other end is connected to the upper auxiliary lock assembly (2) via the upper pull rod (4). The main lock assembly (1) includes a main lock body (13), and an inner lock body (12) and an outer lock body (14) installed on both sides of the main lock body (13). The main lock body (13) includes a main lock box (25), and a main lock and a safety lock installed inside the main lock box (25), with the safety lock limiting the main lock; the main lock includes a main lock tongue (26), a first compression spring (33), an unlocking cam (29), and a rotating disk assembly (31); a limiting boss (251) is provided inside the main lock box (25), an inclined surface (292) is provided on the unlocking cam (29), and a limiting notch (312) is provided on the rotating disk assembly (31); the limiting boss (251) is used to limit the rotation of the unlocking cam (29) and the rotating disk assembly (31); The first compression spring (33) is located inside the main lock tongue (26), the unlocking cam (29) is sleeved on the unlocking cam adapter sleeve (30) installed in the main lock box (25), the rotating disk assembly (31) is sleeved on the rotating disk adapter sleeve (32) installed in the main lock box (25), and the unlocking cam adapter sleeve (30) and the rotating disk adapter sleeve (32) are coaxially connected; The unlocking cam (29) has a first irregular arc (291) inside the hole, and the unlocking cam adapter sleeve (30) has a first arc notch (301) outside the shaft. When one end of the first irregular arc (291) of the unlocking cam (29) contacts one end of the first arc notch (301) of the unlocking cam adapter sleeve (30), a fixed angle of free travel is formed between the other end of the first irregular arc (291) and the other end of the first arc notch (301). The rotating disk assembly (31) has a second irregular arc (311) inside the hole, and the rotating disk adapter sleeve (32) has a second arc notch (321) outside the shaft. When one end of the second irregular arc (311) of the rotating disk assembly (31) contacts one end of the second arc notch (321) of the rotating disk adapter sleeve (32), the other end of the second arc notch (321) forms a fixed angle of empty stroke with the other end of the second irregular arc (311). The first irregular arc (291) and the second irregular arc (311) are spatially misaligned by 45°; the first arc notch (301) and the second arc notch (321) are spatially misaligned by 45°; The rotating disk assembly (31) is provided with a main lock upper pull plate (6) and a main lock lower pull plate (7). The main lock upper pull plate (6) passes through the main lock box (25) and is connected to the upper pull rod (4). The main lock lower pull plate (7) passes through the main lock box (25) and is connected to the lower pull rod (5). The main unlocking shaft lock cylinder (19) of the inner lock body (12) passes through the unlocking cam adapter sleeve (30) and the rotating disk adapter sleeve (32) of the main lock body (13) and is inserted into the main lock hole (141) of the outer lock body (14); After the main lock tongue (26) enters the door frame lock block, it extends. At this time, the free travel 45° formed by the unlocking cam (29) and the unlocking cam adapter sleeve (30) is at point A, and the free travel 45° formed by the rotating disk assembly (31) and the rotating disk adapter sleeve (32) is at point B. At this time, the main lock is locked, and the upper and lower auxiliary locks are not locked. When the main unlocking shaft lock cylinder (19) rotates under the action of external force, the main unlocking shaft lock cylinder (19) simultaneously drives the unlocking cam adapter sleeve (30), the rotating disk adapter sleeve (32) and the rotating disk assembly (31). The unlocking cam (29) remains stationary due to the empty stroke at point A, and the main lock remains locked. The rotating disk assembly (31) simultaneously touches the upper pull rod (4) and the lower pull rod (5), driving the latches of the upper auxiliary lock assembly (2) and the lower auxiliary lock assembly (3) to extend, thereby locking the upper and lower auxiliary lock assemblies.

2. The three-point linkage door lock device for the side door of the driver's cab of a rail vehicle according to claim 1, characterized in that: The safety lock includes a safety latch (27), a safety dial (28), and a first torsion spring (34); the safety dial (28) is located below the unlocking cam (29), and a convex arc is provided on the safety dial (28), and a concave arc is provided on the unlocking cam (29) to match it, and the convex arc of the safety dial (28) limits the concave arc of the unlocking cam (29); One pin of the first torsion spring (34) is mounted on the main lock box (25), and the other pin is mounted on the safety dial (28).

3. The three-point linkage door lock device for the driver's cab side door of a rail vehicle according to claim 1, characterized in that: The inner lock body (12) has a main handle (18) on one side and a main unlocking shaft lock cylinder (19) on the other side. The main handle (18) and the main unlocking shaft lock cylinder (19) are coaxially connected. The initial position of the main handle (18) is horizontal. The main unlocking shaft lock core (19) is fitted with a bidirectional torsion spring (23) and a limiting plate (20). Fasteners are used to connect the main handle (18), the main unlocking shaft lock core (19), the bidirectional torsion spring (23) and the limiting plate (20) fitted on the shaft into a whole. The limiting plate (20) is symmetrically provided with a first limiting pin (21) and a second limiting pin (22) to limit the rotation angle of the limiting plate (20).

4. The three-point linkage door lock device for the driver's cab side door of a rail vehicle according to claim 3, characterized in that: When the main handle (18) is turned, the main unlocking shaft lock core (19) rotates accordingly, and the main unlocking shaft lock core (19) drives the unlocking cam (29) and the rotating disk assembly (31) to rotate. The inner lock body (12) is provided with a safety knob (24), which is inserted into the safety dial (28) of the main lock body (13); the outer lock body (14) is provided with a safety lock cylinder (36), which is inserted into the safety dial (28) of the main lock body (13); the main unlocking shaft lock cylinder (19), the safety knob (24) and the safety lock cylinder (36) form a whole with the main lock body (13), the inner lock body (12) and the outer lock body (14).

5. The three-point linkage door lock device for the side door of the driver's cab of a rail vehicle according to claim 1, characterized in that: The upper auxiliary lock assembly (2) includes an upper auxiliary lock body (37) and an upper auxiliary lock tongue (38). The upper auxiliary lock body (37) includes a cam block (39) and a second torsion spring (40). An upper auxiliary lock pull plate (8) is installed on the cam block (39). One pin of the second torsion spring (40) is installed on the upper auxiliary lock body (37), and the other pin is installed on the cam block (39).

6. The three-point linkage door lock device for the side door of the driver's cab of a rail vehicle according to claim 5, characterized in that: The upper secondary lock assembly (2) and the lower secondary lock assembly (3) have the same structure.

7. The three-point linkage door lock device for the side door of the driver's cab of a rail vehicle according to claim 1, characterized in that: The lower auxiliary lock assembly (3) is connected to the lower pull rod (5) via the lower auxiliary lock pull plate (9) and the second fastener (11); the upper auxiliary lock assembly (2) is connected to the upper pull rod (4) via the upper auxiliary lock pull plate (8) and the fastener.

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