Differential isolation device and railway vehicle door system

Abstract

The differential isolation device comprises a rotating shaft, a stop block, a differential cam connected to the rotating shaft and a lock hook used for isolating a door system, and a groove body is formed in one side face of the differential cam; the lock hook is connected to the rotating shaft in a sleeving mode, a pin is fixed to the side face, close to the differential cam, of the lock hook, and the pin is inserted into a groove body of the differential cam. The stop block can move to the second position under the rotation action of the differential cam and can be reset to the first position, and when the differential cam drives the stop block to move between the first position and the second position, the pin moves in the groove body of the differential cam; when the stopper is out of the second position, the stopper is clamped with the lock hook to limit the movement of the lock hook; and when the backstop is at the second position, the backstop is separated from the lock hook, and the pin is positioned at the tail end of the groove body, so that the lock hook rotates along with the differential cam. The lock hook is limited through the stopping block, and the problem that the lock hook rotates due to vibration and the like when a train runs is solved.

Description

Technical Field

[0001] The present application relates to the technical field of rail vehicle door systems, and in particular to a differential isolation device and a rail vehicle door system. Background Art

[0002] Currently, isolation devices are widely used in rail transit vehicle door systems. When a vehicle door system fails, the door system needs to be isolated and taken out of service to ensure normal train operation.

[0003] In existing isolation devices, due to vibrations during train operation, the locking pin will exert force on the locking hook, causing the locking hook to rotate to its initial position, thereby losing its isolation function and causing the risk of accidental door opening. This poses a safety hazard and, in serious cases, threatens the lives of passengers. Utility Model Content

[0004] The purpose of the present application is to provide a differential isolation device and a rail vehicle door system to solve the problem in the prior art that the locking hook loses its isolation function due to train vibration.

[0005] To achieve the above objectives, this application is implemented using the following technical solutions:

[0006] In a first aspect, the present application discloses a differential isolation device, comprising:

[0007] shaft;

[0008] A differential cam connected to the rotating shaft, wherein a groove is provided on one side surface of the differential cam;

[0009] A lock hook for isolating the door system, the lock hook being sleeved on the rotating shaft, and a pin being fixed on the side close to the differential cam, the pin being inserted into the slot of the differential cam;

[0010] The stopper can move to the second position under the rotation of the differential cam and can be reset to the first position. When the differential cam drives the stopper to move between the first position and the second position, the pin moves in the groove body of the differential cam; when the stopper is outside the second position, the stopper engages the lock hook to limit the movement of the lock hook; when the stopper is in the second position, the stopper is disengaged from the lock hook and the pin is at the end of the groove body, so that the lock hook rotates with the differential cam.

[0011] Furthermore, the lock hook comprises a lock hook body and a hook locking portion connected to the lock hook body, and the lock hook body is provided with a boss;

[0012] When the stopper is outside the second position, the stopper abuts against the boss to limit the movement of the locking hook;

[0013] When the stopper is in the second position, the stopper disengages from the boss.

[0014] Furthermore, the differential cam has a raised portion, and when the stopper is in the second position, the raised portion of the differential cam presses against the end of the stopper.

[0015] Furthermore, it further includes a bottom plate, and the stopper is arranged on the bottom plate through a second positioning torsion spring;

[0016] When the stopper is in the first position, the compression or extension amount of the second positioning torsion spring is less than that when the stopper is in the second position.

[0017] In the second position, the raised portion of the differential cam presses against the end of the stopper. At this time, the deformation amount of the second positioning torsion spring is larger. When the differential cam continues to rotate and its raised portion no longer acts on the stopper, the stopper can be restored to the first position under the action of the second positioning torsion spring, ensuring the reset effect of the stopper.

[0018] Furthermore, the differential cam is sleeved on the rotating shaft, and a screw penetrates through the differential cam to fix it on the rotating shaft.

[0019] Furthermore, it further includes a bottom plate and a locking mechanism. The locking mechanism includes a switch cam assembly fixed on the rotating shaft and a hook connected to the bottom plate; the hook has a locking position and an unlocking position. In the locking position, the hook engages with the switch cam assembly; in the unlocking position, the hook is away from the switch cam assembly.

[0020] Furthermore, a pin shaft is connected to the hook.

[0021] Furthermore, a positioning pin is connected to one side surface of the switch cam assembly, and an arc groove is provided on the bottom plate, and the positioning pin is inserted into the arc groove.

[0022] Furthermore, a first positioning torsion spring is provided between the switch cam assembly and the rotating shaft.

[0023] In a second aspect, the present application discloses a rail vehicle door system, including the differential isolation device according to any one of the first aspect.

[0024] The beneficial effects of the present application are as follows:

[0025] By adding a stopper and a differential cam, the present application limits the locking hook through the stopper, making the locking hook unable to rotate back; by rotating the rotating shaft, the differential cam first lifts the stopper and then the locking hook can rotate and reset, avoiding the situation that the locking hook rotates back due to vibration or the like during the train operation, resulting in the isolation failure of the door system; the isolation device has a simple structure and high reliability. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the isolation device of the present application;

[0027] Figure 2 is Figure 1 schematic diagrams of different perspectives;

[0028] Figure 3 It is a schematic diagram of the initial state of the isolation device of the present application;

[0029] Figure 4 It is a schematic diagram of the isolation state of the isolation device of the present application;

[0030] Figure 5 It is a schematic diagram of the isolation device of the present application with the locking hook hidden in the second position;

[0031] Figure 6 It is a schematic diagram of the isolation device of the present application with the locking hook shown in the second position.

[0032] Where: 1. Rotating shaft; 2. Differential cam; 3. Locking hook; 4. Pin; 5. Stopper; 6. Screw; 7. Switch cam assembly; 8. Hook; 9. Pin shaft; 10. Bottom plate; 11. First positioning torsion spring; 12. Switch; 13. Second positioning torsion spring. Specific embodiments

[0033] To make the technical means, creative features, achieved purposes and functions of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments. 4]

[0034] It should be noted that in the description of the present application, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application rather than requiring the present application to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. The terms "front", "rear", "left", "right", "up", "down" used in the description of the present application refer to the directions in the drawings, and the terms "inside" and "outside" refer to the directions towards or away from the geometric center of a specific component respectively.

[0035] The present application is to solve the problem that the locking hook of the existing isolation device of the rail vehicle door system rotates due to vibration during the train operation, thus causing potential safety hazards. The present application is used for the isolation device. By improving the mechanical structure, it ensures that the locking hook of the isolation device is safe and reliable during the train operation. Only when the crew uses a key or other unlocking device to rotate the rotating shaft can the mechanical isolation device be reset. It effectively avoids the failure of the isolation device, improves the safety of the door system, guarantees the safety of passengers, avoids the occurrence of safety accidents, and has good application prospects.

[0036] As shown Figures 1 to 6 in the figure, a differential isolation device includes a rotating shaft 1, a stop 5, a differential cam 2 connected to the rotating shaft 1, and a locking hook 3 for isolating a door system. A groove is provided on one side surface of the differential cam 2. The locking hook 3 is sleeved on the rotating shaft 1, and a pin 4 is fixed on the side surface close to the differential cam 2. The pin 4 is inserted into the groove of the differential cam 2. The stop 5 can move to a second position under the rotation of the differential cam 2 and can reset to a first position. When the differential cam 2 drives the stop 5 to move between the first position and the second position, the pin 4 moves in the groove of the differential cam 2. When the stop 5 is outside the second position, the stop 5 engages with the locking hook 3 to limit the movement of the locking hook 3. When the stop 5 is in the second position, the stop 5 disengages from the locking hook 3 and the pin 4 is at the end of the groove, so that the locking hook 3 rotates with the differential cam 2.

[0037] During use, the locking hook 3 is sleeved on the rotating shaft 1, the pin 4 is fixed on the locking hook 3 and inserted into the groove on the side surface of the differential cam 2. The stop 5 is in the first position, at this time it engages with the locking hook 3 to limit the movement of the locking hook 3, and the pin 4 is located at one end of the groove of the differential cam 2. Since the stop engages with the locking hook 3 to limit the movement of the locking hook 3, the problem that the isolation device fails due to vibration is prevented.

[0038] When it is necessary to unlock the isolation door, an external power rotates the rotating shaft 1. The rotation of the rotating shaft 1 drives the differential cam 2 to rotate. The pin 4 moves in the groove as the differential cam 2 rotates, and at this time the locking hook 3 does not move. As the differential cam 2 rotates, the differential cam 2 pushes the stop 5 to move from the first position to the second position. When the stop 5 reaches the second position, it completely disengages from the locking hook 3, allowing the locking hook 3 to move freely, and then the isolation device can be reset.

[0039] The engagement mechanism of the stop 5 in this application ensures that the locking hook 3 will not be displaced due to vibration during the operation of the train, ensuring the stable locking state of the door system.

[0040] The following describes this application through a specific embodiment.

[0041] This application discloses a differential isolation device for a rail vehicle door system, which mainly consists of a rotating shaft 1, a differential cam 2, a locking hook 3, a pin 4, a stop 5, a screw 6, a switch cam assembly 7, a retaining hook 8, a pin shaft 9, a bottom plate 10, a first positioning torsion spring 11, a switch 12, and a second positioning torsion spring 13.

[0042] As Figure 1 and Figure 2As shown in the figure, the rotating shaft 1 is connected to the switch cam assembly 7. An arc groove is provided on the bottom plate 10, and the positioning pin in the switch cam assembly 7 moves within the range of the arc groove. The first positioning torsion spring 11 is used to limit the free movement of the switch cam assembly 7. The retaining hook 8 is arranged on the bottom plate 10 through a torsion spring. One end of the retaining hook 8 is connected to the pin shaft 9, and the other end has a hook that can hook the card slot on the side of the switch cam assembly 7. The retaining hook 8 is used to prevent the isolation device from being operated when in the initial position. When the door is closed, the bumper on the door panel impacts the pin shaft 9, causing the retaining hook 8 to withdraw from the card slot on the switch cam assembly 7. At this time, without the limit of the switch cam assembly 7 on the rotating shaft, the rotating shaft 1 can be operated.

[0043] The differential cam 2 is assembled on the rotating shaft 1 through the screw 6 and rotates synchronously with the rotating shaft 1; the pin 4 is assembled on the locking hook 3 to form an integral body; the locking hook 3 is sleeved on the rotating shaft 1, and the differential cam 2 drives the locking hook 3 to rotate together through the pin 4.

[0044] The stopper 5 is pressed against the locking hook 3 and the differential cam 2 through the second positioning torsion spring 13. When in the isolation position, the stopper 5 abuts against the boss on the locking hook 3, preventing the locking hook 3 from rotating back.

[0045] A section of arc groove is provided on the differential cam 2. When the rotating shaft 1 is rotated, the differential cam 2 starts to rotate first, while the locking hook 3 remains stationary. At this time, the differential cam 2 lifts the stopper 5, and then the locking hook 3 rotates together with the differential cam 2 and the rotating shaft 1.

[0046] Further, when the isolation device is in the initial state (such as Figure 3 ), the rotating shaft 1 cannot be rotated. When the door is closed, the bumper on the door panel impacts the pin shaft 9, causing the retaining hook 8 to withdraw from the slot on the switch cam assembly 7. Then, the crew can rotate the rotating shaft 1 to operate the isolation device to the isolation state (the first position). At this time, the stopper 5 abuts against the boss of the locking hook 3, preventing the locking hook 3 from rotating back (such as Figure 4 ), thus avoiding the problem that the locking hook 3 rotates back due to vibration, etc. during the train operation, resulting in accidental unlocking of the isolation device. When the crew rotates the rotating shaft 1 with a key, after the differential cam 2 lifts the stopper 5 (such as Figure 5 , 6), the locking hook 3 will rotate together with the differential cam 2 and the rotating shaft 1, and the isolation device can be reset.

[0047] Compared with the prior art, the isolation device of the rail vehicle door system adopted in this application adds a stopper 5 and a differential cam 2. The stopper 5 limits the locking hook 3, preventing the locking hook 3 from rotating back. When the crew rotates the rotating shaft with a key, the differential cam 2 first lifts the stopper 5, enabling the locking hook 3 to rotate and reset. It avoids the situation that the locking hook rotates back due to vibration, etc. during the train operation, resulting in the failure of the door system isolation. The isolation device has a simple structure and high reliability. It improves the safety of the door system and has good application prospects.

[0048] In one embodiment of the present application, a rail vehicle door system is further disclosed, and the system includes the differential isolation device of any of the above embodiments.

[0049] As is known by technical common sense, the present application can be implemented by other embodiments without departing from its spirit or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and are not exclusive. All changes within the scope of the present application or within the scope equivalent to the present application are encompassed by the present application.

Claims

1. A differential isolation device, characterized in that: include: Rotating shaft (1); A differential cam (2) connected to the rotating shaft (1), wherein a groove is provided on one side surface of the differential cam (2); A lock hook (3) for an isolation door system, wherein the lock hook (3) is sleeved on the rotating shaft (1), and a pin (4) is fixed on the side close to the differential cam (2), and the pin (4) is inserted into the slot body of the differential cam (2); A stopper (5), the stopper (5) can move to the second position under the rotation of the differential cam (2) and can be reset to the first position. When the differential cam (2) drives the stopper (5) to move between the first position and the second position, the pin (4) moves in the slot body of the differential cam (2); when the stopper (5) is outside the second position, the stopper (5) engages the lock hook (3) to limit the movement of the lock hook (3); when the stopper (5) is in the second position, the stopper (5) is disengaged from the lock hook (3) and the pin (4) is at the end of the slot body, so that the lock hook (3) rotates with the differential cam (2).

2. The differential isolation device according to claim 1, wherein: The lock hook (3) comprises a lock hook body and a hook locking portion connected to the lock hook body, and a boss is provided on the lock hook body; When the stopper (5) is outside the second position, the stopper (5) abuts against the boss to limit the movement of the locking hook (3); When the stopper (5) is in the second position, the stopper (5) is disengaged from the boss.

3. The differential isolation device according to claim 2, wherein: The differential cam (2) has a protrusion, and when the stopper (5) is in the second position, the protrusion of the differential cam (2) presses the end of the stopper (5).

4. The differential isolation device according to claim 1, wherein: It also includes a base plate (10), and the stopper (5) is arranged on the base plate (10) via a second positioning torsion spring (13); When the stopper (5) is in the first position, the compression amount or the stretching amount of the second positioning torsion spring (13) is smaller than the compression amount or the stretching amount of the second positioning torsion spring (13) when the stopper (5) is in the second position.

5. The differential isolation device according to claim 1, wherein: The differential cam (2) is sleeved on the rotating shaft (1), and a screw (6) passes through the differential cam (2) to fix it on the rotating shaft (1).

6. The differential isolation device according to claim 1, wherein: The invention also includes a base plate (10) and a locking mechanism, wherein the locking mechanism includes a switch cam assembly (7) fixed on the rotating shaft (1) and a blocking hook (8) connected to the base plate (10); the blocking hook (8) has a locking position and an unlocking position, wherein in the locking position, the blocking hook (8) engages with the switch cam assembly (7); in the unlocking position, the blocking hook (8) is away from the switch cam assembly (7).

7. The differential isolation device according to claim 6, wherein: A pin (9) is connected to the blocking hook (8).

8. The differential isolation device according to claim 6, wherein: A positioning pin is connected to one side surface of the switch cam assembly (7), and an arc groove is provided on the bottom plate (10), and the positioning pin is inserted into the arc groove.

9. The differential isolation device according to claim 8, wherein: A first positioning torsion spring (11) is provided between the switch cam assembly (7) and the rotating shaft (1).

10. A rail vehicle door system, characterized in that: The differential isolation device comprises the differential isolation device according to any one of claims 1 to 9.

Images