Lock for sleeper bed of rail transit vehicle
By designing a lock that includes a rocker arm lock, a latch assembly, and a locking stop assembly, the problem of inconvenient operation of the sleeper bed system in rail transit vehicles was solved, and automatic locking and manual safety were achieved, improving safety and integration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING KANGNI MECHANICAL & ELECTRICAL
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-21
AI Technical Summary
The existing sleeper bed system in rail transit vehicles is inconvenient to operate, especially the locking mechanism which does not automatically engage, affecting safety.
A lock assembly comprising a rocker arm lock, a bolt assembly, a rotating assembly, and a locking stop assembly was designed. Through mechanical cooperation and a torsion spring self-resetting function, it can achieve manual unlocking and automatic locking.
It achieves automatic locking and manual safety of the sleeper bed, improving safety and meeting the requirements of integration and human-machine interface.
Smart Images
Figure CN224149352U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rail transit vehicles, and in particular to a lock for a sleeper bed in a rail transit vehicle. Background Technology
[0002] Rail transit vehicle sleeper bed systems often require manual unlocking, manual locking, and manual safety locking, which is inconvenient to operate. Locking, in particular, should ideally be automatic when fully closed to improve safety. Therefore, there is a need to develop new types of locks specifically designed for rail transit vehicle sleeper beds, enabling manual unlocking, automatic locking, and manual safety locking in the flip position. Summary of the Invention
[0003] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a lock for a sleeper bed in a rail transit vehicle, which realizes manual unlocking, automatic locking and manual safety of the lifting sleeper bed system when it is in the closed position, thereby improving safety.
[0004] Technical Solution: This utility model discloses a lock for a sleeper bed in a rail transit vehicle, characterized in that it includes a rocker arm lock, a latch assembly, a rotating assembly, a locking stop assembly, and a latch seat; the rocker arm lock and the rotating assembly are installed in the middle of the sleeper bed by fasteners, and the transmission bracket of the rocker arm lock is in contact with the welding part of the rotating assembly; the latch assembly is connected to the welding part of the rotating assembly and extends along the length of the sleeper bed board to the latch seat; the locking stop assembly is installed on the car body, and under the action of torsion spring force, the latch opens and abuts against the latch seat to achieve automatic locking in place.
[0005] The swing arm lock includes a transmission bracket, a main lock assembly, a retaining ring, a washer, and a fastener. The swing arm lock connects the transmission bracket and the main lock assembly together through the retaining ring and the washer, and assembles the swing arm lock onto the sleeper bed through the fastener.
[0006] The main lock assembly includes a handle, a safety shaft, a lock box, a holding torsion spring, an unlocking disc, a second washer, a second retaining ring, a limit block, a ball catch, a transition plate, and a second fastener. The main lock assembly connects the handle, safety shaft, lock box, limit block, unlocking disc, and holding torsion spring into one unit through the second washer and the second retaining ring, and then connects the transition plate and the lock box into one unit with the second fastener.
[0007] The handle, unlocking disc, and holding torsion spring are mounted on the lock box via a retaining ring. The safety shaft and limit block are mounted on the lock box via a retaining ring. The limit block is positioned by a ball to restrict the rotation of the unlocking disc, thereby restricting the operation of the handle to achieve the manual safety function.
[0008] The locking tongue assembly includes a flange bearing, a compression spring, a washer, and a locking tongue rod. The two locking tongue assemblies are connected as one unit by a rotating assembly, and then fastened to the profile plate by fastener four. After assembly, the protrusion of the unlocking disc in the main lock assembly contacts one end of the transmission bracket, and the other end contacts the welding part of the toggle block in the rotating assembly.
[0009] In the aforementioned latch assembly, washer three passes through the front end of the latch lever to the flat end, then through the torsion spring and flange bearing one. Flange bearing one is installed inside the latch seat, abutting the front end of the compression spring. The flange end face abuts against the latch seat. When unlocking, the unlocking disc pushes the transmission bracket to rotate, and the transmission bracket then moves the lever. The lever rotates, causing the latch to extend to both ends, compressing the compression spring and pushing the lock stop to disengage from the latch seat, thus realizing the manual unlocking function. Then, the latch retracts by relying on the compression spring to reset.
[0010] The rotating assembly includes fastener three, pressure plate, flange bearing two, fastener four, a toggle block welded component, and mounting plate; the rotating assembly is assembled into an integrated structure by fasteners, guide sleeve, pressure plate, and flange bearing two, and the toggle block welded component can rotate around the guide column of the mounting plate.
[0011] The locking assembly includes a limit support, a bushing, a locking torsion spring, a latch, a locking pin, and a locking tongue seat; the locking assembly is installed on the vehicle body by fastening screws, and the locking hook and locking stop cooperate to achieve locking and unlocking.
[0012] To unlock: Use the four-way key to operate the safety shaft and rotate it clockwise to release the safety. At this time, the limit block is released from the constraint of the unlocking disc. Hold the handle and press the handle clockwise until unlocked. During this process, the handle drives the unlocking disc to rotate. The boss of the unlocking disc moves one end of the transmission bracket. The rotating component moves with the transmission bracket. The rotating component drives the bolt component to move. The two bolt components move relative to each other. The front end of the bolt presses against the latch until the bolt disengages from the lock block, completing the unlocking.
[0013] When locked: Since both the torsion spring and the compression spring are under force when unlocking, the spring force is released after the handle is released, which drives the lock tongue lever and the handle to automatically return to their original positions until the lock tongue engages with the lock stop, thus completing the automatic locking function.
[0014] To lock the valve: Use the four-way key to operate the safety shaft and rotate it counterclockwise until the ball and the limit block engage, thus completing the locking process.
[0015] Beneficial effects: Compared with the prior art, this utility model has the following significant advantages: This utility model adopts a self-resetting function of protrusion, lever, and torsion spring, which, through mechanical cooperation, realizes manual unlocking and automatic locking of the sleeper lift bed lock in the open and closed positions; the modular design structure is simple and meets the requirements of integrated products and human-machine interface of sleeper bed lock. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;
[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;
[0018] Figure 3 This is a schematic diagram of the unlocking mechanism for the sleeper bed lock of this utility model.
[0019] Figure 4 This is a schematic diagram of the rocker arm lock of this utility model;
[0020] Figure 5 This is a schematic diagram of the main lock assembly of this utility model;
[0021] Figure 6 This is a schematic diagram of the unlocking mechanism of the rocker arm lock of this utility model;
[0022] Figure 7 This is a schematic diagram of the locking tongue assembly of this utility model;
[0023] Figure 8 This is a schematic diagram of the rotating assembly of this utility model;
[0024] Figure 9 This is a schematic diagram of the locking assembly of this utility model;
[0025] In the diagram, 1 is the rocker arm lock; 2 is the latch assembly; 3 is the rotating assembly; 4 is the lock stop assembly; 5 is the transmission bracket; 6 is the main lock assembly; 7 is the first retaining ring; 8 is the first washer; 9 is the first fastener; 10 is the handle; 11 is the safety shaft; 12 is the lock box; 13 is the holding torsion spring; 14 is the unlocking disc; 15 is the second washer; 16 is the second retaining ring; 17 is the limit block; 18 is the ball catch; 19 is the transition plate; 20 is the second fastener; 21 is the first flange bearing; 22 is the compression spring; 23 is the third washer; 24 is the latch rod; 25 is the third fastener; 26 is the pressure plate; 27 is the second flange bearing; 28 is the fourth fastener; 29 is the welded piece of the lever block; 30 is the mounting plate; 31 is the limit support; 32 is the bushing; 33 is the lock stop torsion spring; 34 is the lock buckle; 35 is the lock stop pin; and 36 is the latch seat. Detailed Implementation
[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0027] This utility model discloses a lock for a sleeper bed in a rail transit vehicle, comprising a rocker arm lock 1, a latch assembly 2, a rotating assembly 3, a locking stop assembly 4, and a latch seat 36. The rocker arm lock 1 and the rotating assembly 3 are installed in the middle of the sleeper bed by fasteners. The transmission bracket 5 of the rocker arm lock 1 is in contact with the toggle block welded part 29 of the rotating assembly 3 for transmission. The latch assembly 2 is connected to the toggle block welded part 29 of the rotating assembly 3 and extends along the length of the sleeper bed board to the latch seat 36. The locking stop assembly 4 is installed on the car body. Under the action of the torsion spring force, the latch 34 opens and abuts against the latch seat 36 to achieve automatic locking.
[0028] The rocker arm lock 1 of this utility model includes a transmission bracket 5, a main lock assembly 6, a retaining ring 7, a washer 8, and a fastener 9. The rocker arm lock 1 connects the transmission bracket 5 and the main lock assembly 6 into one unit through the retaining ring 7 and the washer 8, and the rocker arm lock 1 is assembled onto the sleeper bed through the fastener 9.
[0029] The main lock assembly 6 of this utility model includes a handle 10, a safety shaft 11, a lock box 12, a holding torsion spring 13, an unlocking disc 14, a second washer 15, a second retaining ring 16, a limiting block 17, a ball catch 18, a transition plate 19, and a second fastener 20. The main lock assembly 6 connects the handle 10, the safety shaft 11, the lock box 12, the limiting block 17, the unlocking disc 14, and the holding torsion spring 13 into one unit through the second washer 15 and the second retaining ring 16, and then connects the transition plate 19 and the lock box 12 into one unit with the second fastener 20.
[0030] The handle 10, unlocking disc 14, and holding torsion spring 13 of this utility model are mounted on the lock box via a retaining ring. The safety shaft 11 and the limiting block 17 are mounted on the lock box via a retaining ring. The limiting block 17 is positioned by a ball 18 to restrict the rotation of the unlocking disc 14, thereby restricting the operation of the handle to achieve the manual safety function.
[0031] The locking tongue assembly 2 of this utility model includes a flange bearing 21, a compression spring 22, a washer 23, and a locking tongue rod 24. The two locking tongue assemblies 2 are connected into one piece by the rotating assembly 3, and then fastened to the profile plate by the fastener 28. After assembly, the protrusion of the unlocking disc 14 in the main lock assembly 6 contacts one end of the transmission bracket 5, and the other end contacts the toggle block welding part 29 in the rotating assembly 3.
[0032] In the latch assembly 2 of this utility model, washer 23 passes through the front end of latch rod 24 to the flat end, and then through torsion spring and flange bearing 21. Flange bearing 21 is installed in latch seat 36. Flange bearing 21 abuts against the front end of compression spring 22. The flange end face abuts against latch seat 36. When unlocking, unlocking disc 14 pushes transmission bracket 5 to rotate. Transmission bracket 5 then moves toggle block. The toggle block rotates and drives the latch to extend to both ends, compressing compression spring 22 and pushing the lock stop to disengage from latch seat 36, realizing manual unlocking function. Then, the latch retracts by relying on compression spring 22 to reset.
[0033] The rotating assembly 3 of this utility model includes fastener three 25, pressure plate 26, flange bearing two 27, fastener four 28, pawl welding piece 29 and mounting plate 30; the rotating assembly 3 is assembled into an integral structure by fasteners, guide sleeve, pressure plate 26 and flange bearing two 27, and pawl welding piece 29 can rotate around the guide column of mounting plate 30.
[0034] The locking assembly 4 of this utility model includes a limiting support 31, a bushing 32, a locking torsion spring 33, a latch 34, a locking pin 35, and a locking tongue seat 36; the locking assembly 4 is installed on the vehicle body by fastening screws, and the locking hook and locking stop cooperate to achieve locking and unlocking.
[0035] During unlocking: Use the four-way key to operate the safety shaft 11 and rotate it clockwise to release the safety. At this time, the limit block 17 is released from the constraint of the unlocking disc 14. Hold the handle 10 and press the handle clockwise until unlocking. During this process, the handle 10 drives the unlocking disc 14 to rotate. The boss of the unlocking disc 14 moves one end of the transmission bracket 5. The rotating component 3 moves with the transmission bracket 5. The rotating component 3 drives the lock tongue component 2 to move. The two lock tongue components 2 move relative to each other. The front end of the lock tongue presses against the lock buckle 34 until the lock tongue disengages from the lock block, completing the unlocking.
[0036] When locked: Since both the torsion spring 13 and the compression spring 22 are under force when unlocking, the spring force is released after the handle 10 is released, which drives the lock tongue lever 24 and the handle 10 to automatically return to their original positions until the lock tongue engages with the lock stop, thus completing the automatic locking function.
[0037] When locking: Use the four-way key to operate the locking shaft 11 to rotate counterclockwise until the ball 18 and the limit block 17 are engaged, thus completing the locking.
[0038] This utility model adopts a self-resetting function of protrusions, levers, and torsion springs, which, through mechanical cooperation, realize the manual unlocking and automatic locking of the sleeper lift bed lock in the open and closed positions; the modular design structure is simple and meets the requirements of integrated products and human-machine interface of sleeper bed lock.
Claims
1. A lock for a track vehicle sleeper bed, characterized by: The system includes a rocker arm lock (1), a latch assembly (2), a rotating assembly (3), a locking stop assembly (4), and a latch seat (36). The rocker arm lock (1) and the rotating assembly (3) are installed in the middle of the sleeper bed by fasteners. The transmission bracket (5) of the rocker arm lock (1) and the push block welded part (29) of the rotating assembly (3) are in contact and drive each other. The latch assembly (2) is connected to the push block welded part (29) of the rotating assembly (3) and extends along the length of the sleeper bed board to the latch seat (36). The locking stop assembly (4) is installed on the carriage body. Under the action of the torsion spring force, the latch (34) opens and abuts against the latch seat (36) to achieve automatic locking in place.
2. The lock for a sleeping bed of a rail vehicle according to claim 1, characterized in that: The swing arm lock (1) includes a transmission bracket (5), a main lock assembly (6), a retaining ring (7), a washer (8), and a fastener (9). The swing arm lock (1) connects the transmission bracket (5) and the main lock assembly (6) together through the retaining ring (7) and the washer (8), and assembles the swing arm lock (1) onto the sleeper bed through the fastener (9).
3. The lock for a track-bound vehicle sleeping berth according to claim 2, characterized in that: The main lock assembly (6) includes a handle (10), a safety shaft (11), a lock box (12), a holding torsion spring (13), an unlocking disc (14), a second washer (15), a second retaining ring (16), a limit block (17), a ball catch (18), a transition plate (19), and a second fastener (20). The main lock assembly (6) connects the handle (10), the safety shaft (11), the lock box (12), the limit block (17), the unlocking disc (14), and the holding torsion spring (13) into one unit through the second washer (15) and the second retaining ring (16), and then connects the transition plate (19) and the lock box (12) into one unit with the second fastener (20).
4. The lock for a track transportation vehicle bunk bed as claimed in claim 3, characterized in that: The handle (10), unlocking disc (14), and holding torsion spring (13) are mounted on the lock box via a shaft retaining ring. The safety shaft (11) and limit block (17) are mounted on the lock box via a shaft retaining ring. The limit block (17) is positioned and restricts the rotation of the unlocking disc (14) via a ball (18).
5. The lock for a sleeping bed of a rail vehicle according to claim 1, characterized in that: The locking tongue assembly (2) includes a flange bearing (21), a compression spring (22), a washer (23) and a locking tongue rod (24). The two locking tongue assemblies (2) are connected as one unit by the rotating assembly (3), and then fastened to the profile plate by fastener four (28). After assembly, the protrusion of the unlocking disc (14) in the main lock assembly (6) contacts one end of the transmission bracket (5), and the other end contacts the toggle block welding part (29) in the rotating assembly (3).
6. The lock for a track transportation vehicle bunk bed as claimed in claim 5, characterized in that: In the latch assembly (2), washer three (23) passes through the front end of the latch pull rod (24) to the flat end, and then through the torsion spring and flange bearing one (21). Flange bearing one (21) is installed in the latch seat (36). Flange bearing one (21) abuts against the front end of the compression spring (22), and the flange end face abuts against the latch seat (36).
7. The lock for a sleeping bed of a rail vehicle according to claim 1, characterized in that: The rotating assembly (3) includes fastener three (25), pressure plate (26), flange bearing two (27), fastener four (28), pawl welding piece (29), and mounting plate (30); the rotating assembly (3) is assembled into an integral structure by fasteners, guide sleeve, pressure plate (26), and flange bearing two (27), and the pawl welding piece (29) can rotate around the guide column of mounting plate (30).
8. The lock for a sleeping bed of a rail vehicle according to claim 1, characterized in that: The locking assembly (4) includes a limiting support (31), a bushing (32), a locking torsion spring (33), a lock buckle (34), a locking pin (35), and a locking tongue seat (36); the locking assembly (4) is installed on the vehicle body by fastening screws.