Automatic opening and closing mechanism for railway vehicle and control method of automatic opening and closing mechanism

Abstract

The invention relates to the technical field of railway vehicles, and discloses an automatic opening and closing mechanism for a railway vehicle and a control method thereof.The automatic opening and closing mechanism comprises a locking mechanism, a supporting frame, an upper supporting mechanism and a cabin door assembly; a left cabin door and a right cabin door of the cabin door assembly are connected to a supporting frame of the railway vehicle through upper supporting mechanisms and further connected with locking mechanisms symmetrically arranged on the supporting frame, and the locking mechanisms are used for locking the left cabin door and the right cabin door when the left cabin door and the right cabin door are opened and closed. By means of the opening and closing mechanism which is opened left and right, the cabin door can be opened or closed according to the actual running situation of the railway vehicle, the two working states of opening or closing of the cabin door are provided, and different working requirements of normal running or reconnection running of the railway vehicle are met; airflow impact force generated when a railway vehicle runs at a high speed acts on the rocker arm through the cabin doors, the sliding block can press the sliding block backstop more tightly, automatic locking of the mechanism is achieved, and it can be guaranteed that the left cabin door and the right cabin door are locked consistently.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to an automatic opening and closing mechanism for rail vehicles and a control method thereof. Background Art

[0002] The opening and closing mechanism is a device that enables the front hatch of a rail vehicle to be opened or closed. The opening and closing mechanism is installed at the front end of the rail vehicle. When the rail vehicle is operating normally, the hatch is in a closed state, covering the coupler and other components, and together with the vehicle hood, it forms a complete streamlined shape, reducing the wind resistance of the rail vehicle and making the rail vehicle more beautiful in appearance; when the rail vehicle is reconnected or needs rescue, the hatch is in an open state, exposing the internal mechanism to provide the required space for the coupler connection. The locking mechanism is an important component of the opening and closing mechanism. When the train is running, the locking mechanism applies a locking force to the movable hatch through the rocker arm, which can resist the impact of airflow and vibration caused by the high-speed running of the train to ensure that the mechanical position of the movable hatch of the opening and closing mechanism remains unchanged.

[0003] The locking mechanism of the existing left-right opening and closing automatic opening and closing mechanism of rail vehicles is mostly a mechanical dead point locking mechanism. Its locking effect is limited by the manufacturing and assembly accuracy of parts, and it is difficult to ensure the consistency of the locking effect of the left and right doors. It is easy to cause problems such as left and right asynchrony when the doors are automatically opened or closed.

[0004] In summary, there is an urgent need to provide an opening and closing mechanism and a control method to solve the problems in the prior art. Summary of the invention

[0005] The object of the present invention is to provide an automatic opening and closing mechanism for a rail vehicle, and its specific technical solution is as follows:

[0006] An automatic opening and closing mechanism for a rail vehicle, comprising a locking mechanism, a support frame, an upper support mechanism and a hatch assembly;

[0007] The left door and the right door of the door assembly are connected to the support frame of the rail vehicle through an upper support mechanism, and the left door and the right door can be opened and closed relative to each other;

[0008] The left door and the right door are also respectively connected to two sets of locking mechanisms symmetrically arranged on the support frame, and the locking mechanisms are used to lock the left door and the right door when they are opened or closed;

[0009] The locking mechanism includes a base, a rocker arm main shaft, a lower rocker arm, an operating rocker arm assembly, a sliding guide rod assembly and a slider;

[0010] The base is arranged on the supporting frame;

[0011] One end of the lower rocker arm is hinged to the base through the rocker arm main shaft, and the other end is connected to the door assembly, and is used to drive the door assembly to open and close through the rotation of the lower rocker arm around the rocker arm main shaft;

[0012] One end of the operating rocker arm assembly is rotatably set on the base, and the other end is slidably connected to the sliding guide rod assembly set on the lower rocker arm through a slider, which is used to drive the slider to slide through the rotation of the operating rocker arm assembly. The sliding of the slider is used to drive the lower rocker arm to rotate around the rocker arm main axis, and a mechanical dead point is formed when the slider is located at one end of the sliding guide rod assembly away from the rocker arm main axis.

[0013] Preferably, it also includes a resistance wheel and a resistance arm;

[0014] The resistance wheel is arranged at the connection between the slider and the operating rocker arm assembly, and the resistance arm is rotatably arranged on the base and located on the movement track of the resistance wheel, and is used to abut the resistance wheel and provide resistance before the sliding guide rod assembly and the lower rocker arm are about to form a mechanical dead point position.

[0015] Preferably, a torsion spring is further provided between the resistance arm and the base, and the torsion spring is used to provide resistance for the resistance arm to abut against the resistance wheel.

[0016] Preferably, it also includes an elastic member, one end of which is connected to the base, and the other end of which is connected to the operating rocker assembly, for providing resistance for the operating rocker assembly to maintain a mechanical dead point position.

[0017] Preferably, a bearing is further provided on the end of the resistance arm that contacts the resistance wheel.

[0018] Preferably, one end of the resistance arm is rotatably arranged on the base through a resistance arm rotating shaft and a resistance arm rotating shaft seat, and a resistance arm stopper for limiting the resistance arm is also provided on the resistance arm rotating shaft seat;

[0019] The resistance arm is also provided with an adjusting screw, and the adjusting screw is used to adjust the relative position of the resistance arm and the resistance wheel.

[0020] Preferably, the operating swing rod assembly comprises an operating shaft, an operating swing rod and a slider connecting rod; the operating shaft is rotatably arranged on the base through an operating swing rod shaft seat, one end of the operating swing rod is connected to the operating shaft, and the other end is connected to the slider connecting rod; the upper part of the slider connecting rod is rotatably connected to the slider; the lower end of the operating shaft is also connected to a hexagonal column;

[0021] The sliding guide rod assembly includes a sliding guide rod, a guide rod mounting seat and a slider stopper; the lower rocker arm is rigidly connected to the guide rod mounting seat through a threaded hole; the cross-sectional shape of the sliding guide rod is composed of a major arc and a corresponding chord, the arc surface of the sliding guide rod is slidingly connected to the corresponding sliding groove arranged on the slider, the plane of the sliding guide rod is rigidly connected to the guide rod mounting seat, and a slider stopper is provided at the end of the sliding guide rod; the middle part of the slider is rotatably connected to the slider connecting rod through a circular hole.

[0022] Preferably, it also includes an actuator cylinder for driving the rocker arm assembly to rotate.

[0023] Preferably, it also includes a limit switch arranged on the base and located at the end point of the stroke of the operating rocker assembly.

[0024] Preferably, it also includes a control system, which includes an electric control box, an air control box and a pneumatic pipeline; the actuator cylinder is connected to the air control box through the pneumatic pipeline, and a one-way throttle valve is also provided on the pneumatic pipeline to adjust the airflow of the pipelines at both ends of the actuator cylinder; the electric control box, the air control box and the limit switch are electrically connected through a cable.

[0025] The application of the technical solution of the present invention has the following beneficial effects:

[0026] (1) An automatic opening and closing mechanism for a rail vehicle of the present invention comprises a locking mechanism, a support frame, an upper support mechanism and a door assembly; the left door and the right door of the door assembly are connected to the support frame of the rail vehicle through the upper support mechanism, and the left door and the right door can be opened and closed relative to each other; the left door and the right door are also respectively connected to two sets of locking mechanisms symmetrically arranged on the support frame, and the locking mechanisms are used to lock the left door and the right door when they are opened and closed; the locking mechanism comprises a base, a rocker arm main shaft, a lower rocker arm, an operating rocker arm assembly, a sliding guide rod assembly and a sliding guide rod assembly. The base is arranged on the supporting frame; one end of the lower rocker arm is hinged to the base through the rocker arm main shaft, and the other end is connected to the hatch assembly, which is used to drive the hatch assembly to open and close through the rotation of the lower rocker arm around the rocker arm main shaft; one end of the operating rocker arm assembly is rotatably arranged on the base, and the other end is slidably connected to the sliding guide rod assembly arranged on the lower rocker arm through a slider, which is used to drive the slider to slide through the rotation of the operating rocker arm assembly, and the sliding of the slider is used to drive the lower rocker arm to rotate around the rocker arm main shaft, and the slider is located on the end of the sliding guide rod assembly away from the rocker arm main shaft to form a mechanical dead point. The left and right opening and closing mechanism can perform the hatch opening or closing action after receiving the command signal sent by the locomotive according to the actual situation of the rail vehicle operation, providing two different working states of opening or closing the movable hatch, meeting the different working requirements of the rail vehicle during normal operation or reconnection (rescue) operation, and at the same time having a manual operation mode under extreme fault conditions such as power failure and gas failure. Through the locking mechanism with a sliding mechanical dead point, due to the effect of the mechanical self-locking angle, the airflow impact force generated by the high-speed running of the rail vehicle acts on the rocker arm and the sliding guide rod through the cabin door, and finally can only make the slider press the slider stop more tightly, thereby realizing the locking function of the mechanism and ensuring that the locking effect of the left and right cabin doors is consistent.

[0027] (2) In the present invention, a resistance arm is provided. When the mechanism is unlocked or locked, the resistance wheel under the slider contacts the resistance arm. Additional operating force is required to force the resistance arm to compress the torsion spring so that the operating rocker arm can continue to rotate. The sharply increased resistance can produce a strong hand feel when performing manual operation, avoiding misjudgment by maintenance personnel when performing manual locking and unlocking operations, and preventing manual operation from being inadequate. When the slider reaches the end of the stroke, the resistance wheel under the slider disengages from the resistance arm. Under the action of the torsion spring elastic force, the resistance arm automatically resets, and the metal resistance arm collides with the resistance arm rotating shaft seat, which can produce a clear impact sound, giving clear sound feedback to maintenance personnel when performing manual locking and unlocking operations, and also preventing manual operation from being inadequate.

[0028] (3) In the present invention, an adjusting screw is also installed through the resistance arm, and the relative position of the front end of the resistance arm and the resistance wheel can be adjusted by the adjusting screw to ensure that the locking effect of the left and right doors is consistent. In combination with a one-way throttle valve, the problem of left and right doors being out of sync when the doors are automatically opened or closed can be solved, and the welding and processing difficulty of the installation plate assembly welding and the bottom plate assembly welding can also be reduced.

[0029] The present invention also provides a control method for an automatic opening and closing mechanism for a rail vehicle, using the automatic opening and closing mechanism for a rail vehicle, comprising the following steps:

[0030] Step 1: Input the open / close command to the control system;

[0031] Step 2: The control system determines the state of the opening and closing mechanism through the limit switch, and the opening and closing mechanism includes three states: open and locked, closed and locked, and in the switching process;

[0032] Step 3: Determine whether the state of the opening and closing mechanism is consistent with the state of the limit switch feedback. If not, initialize the state of the opening and closing mechanism as a whole so that it is in one of the two states, open and locked or closed and locked, which matches the state of the limit switch feedback.

[0033] Step 4: Execute corresponding operations based on the state of the opening and closing mechanism and the opening / closing instruction. If the opening and closing mechanism is in the open and locked state, close and lock the opening and closing mechanism; if the opening and closing mechanism is in the closed and locked state, open and lock the opening and closing mechanism;

[0034] The step of closing and locking the opening and closing mechanism comprises:

[0035] Sending a reversing signal to the two-position five-way valve through an intermediate relay puts it in a closed state and locks the opening and closing mechanism;

[0036] The pressure of the actuator cylinder is adjusted to the point where the opening and closing mechanism can operate smoothly through the air supply of the pressure reducing valve. The operating speed is adjusted by the one-way throttle valve, so that the actuator cylinder push rod moves forward, the left and right doors are closed and locked, and the limit switch action of the door closing position is triggered. The limit switch feedbacks the closed and locked state.

[0037] The pressure reducing valve increases the pressure to keep the actuator cylinder in a pressure-maintaining state, and has sufficient clamping force to resist the influence of wind pressure;

[0038] The steps of opening and locking the opening and closing mechanism include:

[0039] Sending a reversing signal to the two-position five-way valve through an intermediate relay makes it open and locks the opening and closing mechanism;

[0040] The pressure of the actuator cylinder is adjusted through the air pressure reducing valve to ensure smooth operation of the opening and closing mechanism. The operating speed is adjusted by the one-way throttle valve, causing the actuator cylinder push rod to run backward, and the left and right doors are opened and locked, triggering the limit switch to open the door into position, and the limit switch feedbacks the open and locked state.

[0041] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 is a schematic diagram of the opening and closing mechanism of the present invention;

[0044] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle locking mechanism;

[0045] Figure 3 yes Figure 2 A partial schematic diagram of the middle locking mechanism;

[0046] Figure 4 It is a schematic diagram of the structure of the base and the rocker arm spindle;

[0047] Figure 5 It is a structural diagram of the lower rocker arm;

[0048] Figure 6 It is an assembly diagram of the operating swing rod assembly, the elastic member and the sliding guide rod assembly;

[0049] Figure 7 It is a schematic diagram of the connection relationship of the resistance arm;

[0050] Figure 8 It is a schematic diagram of the distribution of the resistance arm, torsion spring and limit switch;

[0051] Fig. 9 It is the connection diagram of the control system;

[0052] Fig.10 It is a structural schematic diagram of the upper support mechanism.

[0053] Among them, 1. locking mechanism; 2. control system; 3. support frame; 4. upper support mechanism; 5. left door; 6. right door;

[0054] 1.1, base; 1.2, rocker arm main shaft; 1.3, lower rocker arm; 1.4, operating rocker arm assembly; 1.5, elastic part; 1.6, sliding guide rod assembly; 1.7, slider; 1.8, resistance wheel; 1.9, resistance arm; 1.10, torsion spring; 1.11, actuator cylinder; 1.12, limit switch;

[0055] 1.1.1, Assembly welding of mounting plate; 1.1.2, Assembly welding of bottom plate; 1.1.3, Operating rocker arm shaft seat; 1.1.4, Rocker arm main shaft seat; 1.1.5, Elastic component mounting seat 1; 1.1.6, Resistance arm shaft seat; 1.1.7, Torsion spring mounting groove; 1.1.8, Cylinder tail end mounting seat;

[0056] 1.3.1, rocker arm sleeve; 1.3.2, rocker arm plate; 1.3.3, reinforcing ribs; 1.3.4, hanging plate; 1.3.5, guide rod assembly installation hole;

[0057] 1.4.1, operating shaft; 1.4.2, operating swing rod; 1.4.3, elastic member mounting seat 2; 1.4.4, slider connecting rod; 1.4.5, cylinder front end mounting seat; 1.4.6, hexagonal column;

[0058] 1.6.1, sliding guide rod; 1.6.2, guide rod mounting seat; 1.6.3, slider stopper;

[0059] 1.9.1, resistance arm shaft; 1.9.2, resistance arm stopper; 1.9.3, adjustment screw; 1.9.4, bearing;

[0060] 2.1, Electric control box; 2.2, Pneumatic control box; 2.3, Pneumatic pipeline; 2.4, Cable;

[0061] 2.1.1, switch power supply; 2.1.2, relay; 2.2.1, pressure regulating valve; 2.2.2, two-position five-way valve; 2.2.3, manual three-way valve; 2.3.1, one-way throttle valve;

[0062] 4.1. Upper rocker arm main shaft seat; 4.2. Upper rocker arm main shaft; 4.3. Upper left rocker arm assembly; 4.4. Upper right rocker arm assembly. DETAILED DESCRIPTION

[0063] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0064] refer to Figure 1, an automatic opening and closing mechanism for a rail vehicle, comprising a locking mechanism 1, a support frame 3, an upper support mechanism 4 and a door assembly; a left door 5 and a right door 6 of the door assembly are connected to the support frame 3 of the rail vehicle through the upper support mechanism 4, and the left door 5 and the right door 6 can be relatively opened and closed; the left door 5 and the right door 6 are also respectively connected to the locking mechanism 1 symmetrically arranged on the support frame 3, and the locking mechanism 1 is used to lock the left door 5 and the right door 6 when they are opened and closed;

[0065] like Figure 2 , Figure 3 , Figure 8 As shown, the overall structure of the locking mechanism is symmetrically arranged, and the locking mechanism 1 includes a base 1.1, a rocker arm main shaft 1.2, a lower rocker arm 1.3, an operating rocker arm assembly 1.4, a sliding guide rod assembly 1.6 and a slider 1.7; the base is arranged on the supporting frame 3; one end of the lower rocker arm 1.3 is hinged to the base 1.1 through the rocker arm main shaft 1.2, and the other end is connected to the door assembly, which is used to drive the door assembly to open and close through the rotation of the lower rocker arm 1.3 around the rocker arm main shaft 1.2; one end of the operating rocker arm assembly 1.4 is rotatably arranged on the base 1.1, and the other end is slidably connected to the sliding guide rod assembly 1.6 arranged on the lower rocker arm 1.3 through the slider 1.7, which is used to drive the slider 1.7 to slide through the rotation of the operating rocker arm assembly 1.4, and the sliding of the slider 1.7 is used to drive the lower rocker arm 1.3 to rotate around the rocker arm main shaft 1.2, and the slider 1.7 forms a mechanical dead point when it is located on the sliding guide rod assembly 1.6 away from the rocker arm main shaft 1.2.

[0066] The automatic opening and closing mechanism of this embodiment can provide two different working states of opening or closing the movable door according to the actual operation of the rail vehicle, meeting the different working requirements of the rail vehicle during normal operation or reconnection (rescue) operation. After receiving the command signal from the locomotive, the opening and closing mechanism executes the door opening or closing action, and also has a manual operation mode in extreme fault conditions such as power failure and gas failure.

[0067] like Figure 4 As shown, the base 1.1 includes a mounting plate assembly weld 1.1.1, a bottom plate assembly weld 1.1.2, an operating rocker arm shaft seat 1.1.3, a rocker arm main shaft seat 1.1.4, an elastic member mounting seat 1.1.5 and a resistance arm shaft seat 1.1.6, all of which are connected by welding or threading, and a torsion spring mounting groove 1.1.7 is also provided thereon, and a rocker arm main shaft 1.2 and a split cylinder tail end mounting seat 1.1.8 are installed thereon.

[0068] like Figure 5As shown, the lower rocker arm 1.3 is composed of a rocker arm sleeve 1.3.1, a rocker arm plate 1.3.2, a reinforcing rib 1.3.3, etc. One end is rotatably connected to the rocker arm main shaft 1.2 on the base 1.1, and the other end is rigidly connected to the left and right doors through a hanging plate 1.3.4. A guide rod assembly mounting hole 1.3.5 is provided on the lower rocker arm 1.3 for rigid connection with the sliding guide rod assembly 1.6.

[0069] like Figure 7 As shown, in a specific embodiment, it also includes a resistance wheel 1.8 and a resistance arm 1.9; the resistance wheel 1.8 is arranged at the connection between the slider 1.7 and the operating rocker assembly 1.4, and one end of the resistance arm 1.9 is rotatably connected to the resistance arm shaft seat 1.1.6 through the resistance arm shaft 1.9.1, and the resistance arm 1.9 is rotatably arranged on the base 1.1 and is located on the movement trajectory of the resistance wheel 1.8, and is used for abutting the resistance wheel 1.8 and providing resistance before the sliding guide rod assembly 1.6 and the lower rocker arm 1.3 are about to form a mechanical dead point position.

[0070] A torsion spring 1.10 is further provided between the resistance arm 1.9 and the base 1.1, and the torsion spring 1.10 is used to provide resistance for the resistance arm 1.9 to abut against the resistance wheel 1.8.

[0071] One end of the torsion spring 1.10 is inserted into the torsion spring installation groove 1.1.7, and the other end is in contact with the resistance arm 1.9, and provides a preload force after installation to maintain the resistance arm 1.9 at the position of the resistance arm stop 1.9.2.

[0072] like Figure 8 As shown, resistance arms 1.9 and torsion springs 1.10 are provided at the open position and the closed position of the left and right doors to provide a limiting function for the slider 1.7.

[0073] like Figure 2 , Figure 6 As shown, it also includes an elastic member 1.5, one end of which is connected to the base 1.1, and the other end is connected to the operating rocker assembly 1.4. One end of the elastic member 1.5 is rotatably connected to the elastic member mounting seat 1 1.1.5 on the base 1.1, and the second end is rotatably connected to the elastic member mounting seat 2 1.4.3 in the middle of the operating rocker assembly 1.4. The elastic member 1.5 should be able to provide appropriate elastic force when installed, and can be compressed during the movement of the locking mechanism 1. It is used to provide resistance for the operating rocker assembly 1.4 to maintain the mechanical dead point position.

[0074] In order to reduce the friction loss between the resistance arm 1.9 and the resistance wheel 1.8, a bearing 1.9.4 is installed at the front end of the resistance arm 1.9, and the sliding friction is replaced by rolling friction, thereby increasing the service life of the resistance arm 1.9.

[0075] One end of the resistance arm 1.9 is rotatably arranged on the base 1.1 through the resistance arm rotating shaft 1.9.1 and the resistance arm rotating shaft seat 1.1.6, and the resistance arm rotating shaft seat 1.1.6 is also provided with a resistance arm stopper 1.9.2 for limiting the resistance arm 1.9; the resistance arm 1.9 is also provided with an adjusting screw 1.9.3, and the adjusting screw 1.9.3 is used to adjust the relative position of the resistance arm 1.9 and the resistance wheel 1.8 to ensure the consistency of the locking effect of the left and right doors. During the movement of the mechanism, when the slider 1.7 approaches the end of the stroke, the resistance wheel 1.8 under the slider 1.7 contacts the resistance arm 1.9, forcing the resistance arm 1.9 to compress the torsion spring 1.10 and rotate around the resistance arm rotating shaft 1.9.1; when the slider 1.7 reaches the end of the stroke, the resistance wheel 1.8 under the slider 1.7 is out of contact with the resistance arm 1.9, and at this time, under the action of the elastic force of the torsion spring 1.10, the resistance arm 1.9 can automatically reset.

[0076] like Figure 6 As shown, the operating rocker assembly 1.4 includes an operating shaft 1.4.1, an operating rocker 1.4.2, an elastic member mounting seat 2 1.4.3, a slider connecting rod 1.4.4 and a cylinder front end mounting seat 1.4.5. The elastic member 1.5 is rotationally connected to the operating rocker assembly 1.4 through the elastic member mounting seat 2 1.4.3, and the actuator cylinder 1.11 is rotationally connected to the operating rocker assembly 1.4 through the cylinder front end mounting seat 1.4.5. The operating shaft 1.4.1 is rotationally arranged on the base 1.1 through the operating rocker shaft seat 1.1.3, one end of the operating rocker 1.4.2 is connected to the operating shaft 1.4.1, and the other end is connected to the slider connecting rod 1.4.4; the upper part of the slider connecting rod 1.4.4 is rotationally connected to the slider 1.7, and a groove is arranged in the middle part for installing the resistance wheel 1.8 into the groove through the shaft elastic retaining ring. The lower end of the operating shaft 1.4.1 is also connected to a hexagonal column 1.4.6 for manually operating the operating swing arm assembly 1.4.

[0077] like Figure 6 As shown, the sliding guide rod assembly 1.6 includes a sliding guide rod 1.6.1, a guide rod mounting seat 1.6.2 and a slider stopper 1.6.3; the lower rocker arm 1.3 is rigidly connected to the guide rod mounting seat 1.6.2 through a threaded hole; the cross-sectional shape of the sliding guide rod 1.6.1 is composed of a major arc and a corresponding chord, the arc surface of the sliding guide rod 1.6.1 is slidingly connected to the corresponding sliding groove arranged on the slider 1.7, the plane of the sliding guide rod 1.6.1 is rigidly connected to the guide rod mounting seat 1.6.2, and a slider stopper 1.6.3 is provided at the end of the sliding guide rod 1.6.1; the middle part of the slider 1.7 is rotatably connected to the slider connecting rod 1.4.4 through a circular hole.

[0078] like Figure 2As shown, it also includes an actuating cylinder 1.11 for driving the operating swing rod assembly 1.4 to rotate. The tail end of the actuating cylinder 1.11 is rotatably connected to the cylinder tail end mounting seat 1.1.8, and the front end is rotatably connected to the cylinder front end mounting seat 1.4.5 in the middle of the operating swing rod assembly 1.4, which can drive the operating swing rod assembly 1.4 to rotate around the axis of the operating shaft 1.4.1.

[0079] It also includes four groups of limit switches 1.12 arranged on the base 1.1 and located at the end of the travel of the operating swing arm assembly 1.4, corresponding to the opening position and closing position of the left and right doors respectively.

[0080] like Fig. 9 As shown, it also includes a control system 2, which includes an electric control box 2.1, an air control box 2.2 and a pneumatic pipeline 2.3; the electric control box 2.1 is provided with a switching power supply 2.1.1 and a relay 2.1.2; the air control box 2.2 is provided with a pressure regulating valve 2.2.1, a two-position five-way valve 2.2.2 and a manual three-way valve 2.2.3; the four limit switches 1.2 correspond to the open position and the closed position of the left and right doors respectively; the pneumatic pipeline 2.3 connects the execution cylinder 1.11 with the air control box 2.2 for air circuit connection, and is provided with four one-way throttle valves 2.3.1, which correspond to the exhaust flow of the pipelines at both ends of the left and right execution cylinders 1.11 respectively; the electric control box 2.1, the air control box 2.2 and the limit switch 1.12 are electrically connected through a cable 2.4.

[0081] The present embodiment is a novel sliding mechanical dead point locking mechanism. The operating rocker arm is a fixed-length connecting rod. In the locking position of the locking mechanism, the relative position of the front end of the resistance arm and the resistance wheel can be adjusted by adjusting the screw to ensure consistent locking effects of the left and right doors. In combination with a one-way throttle valve, the problem of left and right doors being out of sync when the doors are automatically opened or closed can be solved.

[0082] like Fig.10 As shown, the upper support mechanism 4 has a symmetrical overall structure, including an upper rocker arm main shaft seat 4.1, an upper rocker arm main shaft 4.2, an upper left rocker arm assembly 4.3, and an upper right rocker arm assembly 4.4, which are mounted to the upper part of the support frame through the upper rocker arm main shaft seat. The upper rocker arm main shaft 4.2 is coaxial with the rocker arm main shaft 1.2.

[0083] The upper ends of the left door and the right door are rigidly connected to the upper supporting mechanism respectively, and the lower ends are rigidly connected to the locking mechanism respectively. They can rotate around the main axis of the rocker arm together with the rocker arm and be locked by the locking mechanism.

[0084] The working principle of the opening and closing mechanism of the present invention is:

[0085] The operating rocker assembly is driven to rotate by the actuator cylinder, or the unlocking tool is connected to the hexagonal column of the operating shaft, and the operating rocker assembly is driven to rotate by manpower, so that the slider can slide in the sliding guide assembly, drive the rocker arm to rotate around the rocker arm shaft, and finally drive the movable door to rotate to achieve the opening or closing function. When operating manually, the manual three-way valve of the air control box must be rotated to the deflated state first, so that the pipelines at both ends of the actuator cylinder are directly connected to the external atmospheric environment.

[0086] When the operating rocker assembly and the sliding guide rod assembly are close to vertical, that is, when the slider is close to the slider stop, the resistance wheel under the slider contacts the front end of the resistance arm, and additional power is required to force the resistance arm to compress the torsion spring so that the operating rocker assembly can continue to rotate.

[0087] When the operating swing rod assembly is perpendicular to the sliding guide rod assembly, the critical position of the mechanical dead point is reached. The operating swing rod assembly is rotated continuously to make the slider contact the slider stopper. The slider reaches the end of the stroke. At this time, the angle between the operating swing rod assembly and the sliding guide rod assembly is less than 90 degrees, and the locking mechanism is locked in place. At the same time, the resistance wheel under the slider is out of contact with the resistance arm, and the resistance arm can be automatically reset under the action of the torsion spring elastic force.

[0088] The operating rocker arm assembly, the lower rocker arm and the sliding guide rod assembly, and the base can all be regarded as rigid connecting rods. After the locking mechanism runs to the end of its stroke, due to the effect of the mechanical self-locking angle, the airflow impact generated by the high-speed running of the rail vehicle acts on the lower rocker arm and the sliding guide rod assembly through the hatch, and ultimately can only make the slider press the slider stop more tightly, which is more conducive to the locking of the mechanism.

[0089] The elastic member can provide sufficient elastic force to maintain the operating rocker assembly at the end of the travel of the locking mechanism, thereby preventing disturbances such as bumps and vibrations during the operation of the rail vehicle from causing abnormal rotation of the operating rocker assembly and avoiding the problem of locking failure.

[0090] The resistance arm can provide a limit function for the slider through the resistance wheel under the slider, so that the slider is always close to the slider stop, which can prevent the slider from being out of contact with the slider stop due to disturbances such as bumps and vibrations during the operation of the rail vehicle, thereby avoiding the problem of locking failure. The relative position of the front end of the resistance arm and the resistance wheel can also be adjusted by adjusting the screw to ensure the same locking effect of the left and right doors.

[0091] The working principle of the present invention is:

[0092] By executing the cylinder 1.11 to drive the operating rocker assembly 1.4 to rotate, or connecting the unlocking tool with the hexagonal column 1.4.6 of the operating shaft 1.4.1, and driving the operating rocker assembly 1.4 to rotate by manpower, the slider 1.7 can slide in the sliding guide rod assembly 1.6, driving the lower rocker arm 1.3 to rotate around the rocker arm shaft 1.2, and finally driving the movable door to rotate to achieve the opening or closing function.

[0093] During manual operation, the manual three-way valve 2.2.3 of the air control box 2.2 must first be rotated to the deflated state so that the pipelines at both ends of the actuator cylinder 1.11 are directly connected to the external atmospheric environment.

[0094] refer to Figure 6 When the operating swing arm assembly 1.4 and the sliding guide rod assembly 1.6 are close to vertical, that is, when the slider 1.7 is close to the slider stop 1.6.3, the resistance wheel 1.8 below the slider 1.7 contacts the bearing 1.9.4 at the front end of the resistance arm 1.9, and additional power is required to force the resistance arm 1.9 to compress the torsion spring 1.10 so that the operating swing arm assembly 1.4 can continue to rotate.

[0095] When the operating swing rod assembly 1.4 and the sliding guide rod assembly 1.6 are perpendicular, they reach the critical position of the mechanical dead point. The operating swing rod assembly 1.4 is rotated continuously to make the slider 1.7 contact the slider stopper 1.6.3, and the slider 1.7 reaches the end of the stroke. At this time, the angle between the operating swing rod assembly 1.4 and the sliding guide rod assembly 1.6 is less than 90 degrees, and the locking mechanism 1 is locked in place. At the same time, the resistance wheel 1.8 under the slider 1.7 is out of contact with the bearing 1.9.4 at the front end of the resistance arm 1.9, and the resistance arm 1.9 can be automatically reset under the elastic force of the torsion spring 1.10.

[0096] The operating rocker arm assembly 1.4, the lower rocker arm 1.3, the sliding guide rod assembly 1.6 and the base 1.1 can all be regarded as rigid connecting rods. After the locking mechanism 1 runs to the end of the stroke, due to the effect of the mechanical self-locking angle, the airflow impact generated by the high-speed running of the rail vehicle acts on the lower rocker arm 1.3 and the sliding guide rod assembly 1.6 through the hatch, and finally the slider 1.7 can only press the slider stopper 1.6.3 more tightly, which is more conducive to the locking of the mechanism.

[0097] The elastic member 1.5 can provide sufficient elastic force to maintain the operating rocker assembly 1.4 at the end of the travel of the locking mechanism 1, thereby preventing the operating rocker assembly 1.4 from rotating abnormally due to disturbances such as bumps and vibrations during the operation of the rail vehicle, thereby avoiding the problem of locking failure.

[0098] The resistance arm 1.9 can provide a limiting function for the slider 1.7 through the resistance wheel 1.8 under the slider 1.7, so that the slider 1.7 is always close to the slider stopper 1.8, which can prevent the slider 1.7 from being out of contact with the slider stopper 1.8 due to disturbances such as bumps and vibrations during the operation of the rail vehicle, thereby avoiding the problem of locking failure. The relative position of the front end of the resistance arm 1.9 and the resistance wheel 1.8 can also be adjusted by adjusting the screw 1.9.3 to ensure that the locking effect of the left and right doors is consistent.

[0099] This embodiment also provides a control method for an automatic opening and closing mechanism for a rail vehicle, which adopts the automatic opening and closing mechanism for a rail vehicle, and the steps are as follows:

[0100] Step 1: Input the open / close command to the control system;

[0101] Step 2: The control system determines the state of the opening and closing mechanism through the limit switch, and the opening and closing mechanism includes three states: open and locked, closed and locked, and in the switching process;

[0102] Step 3: Determine whether the state of the opening and closing mechanism is consistent with the state of the limit switch feedback. If not, initialize the state of the opening and closing mechanism as a whole so that it is in one of the two states, open and locked or closed and locked, which matches the state of the limit switch feedback.

[0103] After manual operation, the internal status of the opening and closing mechanism may be inconsistent with the feedback signal. It is necessary to judge the status of the door assembly according to the status of the limit switch, and initialize and unify the status of the components and systems of the opening and closing mechanism.

[0104] Step 4: Execute corresponding operations based on the state of the opening and closing mechanism and the opening / closing instruction. If the opening and closing mechanism is in the open and locked state, close and lock the opening and closing mechanism; if the opening and closing mechanism is in the closed and locked state, open and lock the opening and closing mechanism;

[0105] The step of closing and locking the opening and closing mechanism comprises:

[0106] Sending a reversing signal to the two-position five-way valve through an intermediate relay puts it in a closed state and locks the opening and closing mechanism;

[0107] The pressure of the actuator cylinder is adjusted to the point where the opening and closing mechanism can operate smoothly through the air supply of the pressure reducing valve. The operating speed is adjusted by the one-way throttle valve, so that the actuator cylinder push rod moves forward, the left and right doors are closed and locked, and the limit switch action of the door closing position is triggered. The limit switch feedbacks the closed and locked state.

[0108] The pressure reducing valve increases the pressure to keep the actuator cylinder in a pressure-maintaining state, and has sufficient clamping force to resist the influence of wind pressure;

[0109] The steps of opening and locking the opening and closing mechanism include:

[0110] Sending a reversing signal to the two-position five-way valve through an intermediate relay makes it open and locks the opening and closing mechanism;

[0111] The pressure of the actuator cylinder is adjusted through the air pressure reducing valve to ensure smooth operation of the opening and closing mechanism. The operating speed is adjusted by the one-way throttle valve, causing the actuator cylinder push rod to run backward, and the left and right doors are opened and locked, triggering the limit switch to open the door into position, and the limit switch feedbacks the open and locked state.

[0112] During operation, the limit closure is not triggered and is in the initial state. The normally closed contact is always closed. The normally closed contact of the door opening / closing limit switch is used to detect the operating state of the cylinder. The hood opening and closing process is judged by connecting four pairs of normally closed contacts in series. If all four sets of limit switches are not triggered, it is judged that the hood is in the opening and closing process. A feedback signal of the hood opening and closing process will be sent to the train. By feeding back the signal of the opening and closing process, the driver and others will pay attention to the state of the opening and closing mechanism to prevent pinching. The signal of the opening and closing mechanism failure can also be sent out by being in the process state for a long time.

[0113] Manual operation: Since the actuator cylinder is in a pressure-maintaining state after being in place, it provides tightening force for the left and right doors. The system air pressure needs to be discharged through the three-way valve to perform the corresponding manual function.

[0114] The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways within the spirit and principles of the present invention.

Claims

1. An automatic opening and closing mechanism for a rail vehicle, characterized in that: It comprises a locking mechanism (1), a supporting frame (3), an upper supporting mechanism (4) and a cabin door assembly; The left door (5) and the right door (6) of the door assembly are both connected to a support frame (3) of the rail vehicle via an upper support mechanism (4), and the left door (5) and the right door (6) can be relatively opened and closed; The left door (5) and the right door (6) are also respectively connected to locking mechanisms (1) symmetrically arranged on the support frame (3), and the locking mechanisms (1) are used to lock the left door (5) and the right door (6) when they are opened or closed; The locking mechanism (1) comprises a base (1.1), a rocker arm main shaft (1.2), a lower rocker arm (1.3), an operating rocker arm assembly (1.4), a sliding guide rod assembly (1.6) and a sliding block (1.7); The base is arranged on a supporting frame (3); One end of the lower rocker arm (1.3) is hinged to the base (1.1) via a rocker arm main shaft (1.2), and the other end is connected to the door assembly, so as to drive the door assembly to open and close by rotating the lower rocker arm (1.3) around the rocker arm main shaft (1.2); One end of the operating rocker arm assembly (1.4) is rotatably arranged on the base (1.1), and the other end is slidably connected to a sliding guide rod assembly (1.6) arranged on the lower rocker arm (1.3) through a slider (1.7), and is used to drive the slider (1.7) to slide through the rotation of the operating rocker arm assembly (1.4), and the sliding of the slider (1.7) is used to drive the lower rocker arm (1.3) to rotate around the rocker arm main shaft (1.2), and a mechanical dead point is formed when the slider (1.7) is located at an end of the sliding guide rod assembly (1.6) away from the rocker arm main shaft (1.2).

2. The automatic opening and closing mechanism for a rail vehicle according to claim 1, characterized in that: It also includes a resistance wheel (1.8) and a resistance arm (1.9); The resistance wheel (1.8) is arranged at the connection between the slider (1.7) and the operating rocker assembly (1.4); the resistance arm (1.9) is rotatably arranged on the base (1.1) and is located on the movement track of the resistance wheel (1.8), and is used to abut against the resistance wheel (1.8) and provide resistance before the sliding guide rod assembly (1.6) and the lower rocker arm (1.3) are about to form a mechanical dead point position; A bearing (1.9.4) is also provided on the end of the resistance arm (1.9) that contacts the resistance wheel (1.8).

3. The automatic opening and closing mechanism for a rail vehicle according to claim 2, characterized in that: A torsion spring (1.10) is also provided between the resistance arm (1.9) and the base (1.1), and the torsion spring (1.10) is used to provide resistance for the resistance arm (1.9) to abut against the resistance wheel (1.8).

4. The automatic opening and closing mechanism for a rail vehicle according to claim 3, characterized in that: It also comprises an elastic member (1.5), one end of which is connected to the base (1.1), and the other end of which is connected to the operating rocker assembly (1.4), and is used to provide resistance for the operating rocker assembly (1.4) to maintain the mechanical dead point position.

5. The automatic opening and closing mechanism for a rail vehicle according to claim 4, characterized in that: One end of the resistance arm (1.9) is rotatably arranged on the base (1.1) via a resistance arm rotating shaft (1.9.1) and a resistance arm rotating shaft seat (1.1.6); a resistance arm stopper (1.9.2) for limiting the resistance arm (1.9) is also arranged on the resistance arm rotating shaft seat (1.1.6); The resistance arm (1.9) is also provided with an adjusting screw (1.9.3), and the adjusting screw (1.9.3) is used to adjust the relative position of the resistance arm (1.9) and the resistance wheel (1.8).

6. The automatic opening and closing mechanism for a rail vehicle according to claim 5, characterized in that: The operating swing rod assembly (1.4) comprises an operating shaft (1.4.1), an operating swing rod (1.4.2) and a slider connecting rod (1.4.4); the operating shaft (1.4.1) is rotatably arranged on the base (1.1) through an operating swing rod rotating shaft seat (1.1.3); one end of the operating swing rod (1.4.2) is connected to the operating shaft (1.4.1) and the other end is connected to the slider connecting rod (1.4.4); the upper part of the slider connecting rod (1.4.4) is rotatably connected to the slider (1.7); the lower end of the operating shaft (1.4.1) is also connected to a hexagonal column (1.4.6); The sliding guide rod assembly (1.6) comprises a sliding guide rod (1.6.1), a guide rod mounting seat (1.6.2) and a slider stopper (1.6.3); the lower rocker arm (1.3) is rigidly connected to the guide rod mounting seat (1.6.2) via a threaded hole; the cross-sectional shape of the sliding guide rod (1.6.1) consists of a major arc and a corresponding chord, the arc surface of the sliding guide rod (1.6.1) is slidingly connected to a corresponding sliding groove arranged on a slider (1.7), the plane of the sliding guide rod (1.6.1) is rigidly connected to the guide rod mounting seat (1.6.2), and a slider stopper (1.6.3) is provided at the end of the sliding guide rod (1.6.1); the middle part of the slider (1.7) is rotatably connected to the slider connecting rod (1.4.4) via a round hole.

7. The automatic opening and closing mechanism for a rail vehicle according to claim 6, characterized in that: It also includes an actuator cylinder (1.11) for driving the rocker assembly (1.4) to rotate.

8. The automatic opening and closing mechanism for a rail vehicle according to claim 7, characterized in that: It also includes a limit switch (1.12) which is arranged on the base (1.1) and is located at the end point of the stroke of the operating rocker assembly (1.4).

9. The automatic opening and closing mechanism for a rail vehicle according to claim 8, characterized in that: The invention also comprises a control system (2), which comprises an electric control box (2.1), an air control box (2.2) and a pneumatic pipeline (2.3); the actuating cylinder (1.11) is connected to the air control box (2.2) through the pneumatic pipeline (2.3); a one-way throttle valve (2.3.1) is provided on the pneumatic pipeline (2.3) for adjusting the airflow of the pipelines at both ends of the actuating cylinder (1.11); the electric control box (2.1), the air control box (2.2) and the limit switch (1.12) are electrically connected through a cable (2.4).

10. A control method for an automatic opening and closing mechanism for a rail vehicle, characterized in that: The automatic opening and closing mechanism for rail vehicles as claimed in claim 9 comprises the following steps: Step 1: Input the open / close command to the control system; Step 2: The control system determines the state of the opening and closing mechanism through the limit switch, and the opening and closing mechanism includes three states: open and locked, closed and locked, and in the switching process; Step 3: Determine whether the state of the opening and closing mechanism is consistent with the state of the limit switch feedback. If not, initialize the state of the opening and closing mechanism as a whole so that it is in one of the two states, open and locked or closed and locked, which matches the state of the limit switch feedback. Step 4: Execute corresponding operations based on the state of the opening and closing mechanism and the opening / closing instruction. If the opening and closing mechanism is in the open and locked state, close and lock the opening and closing mechanism. If it is in the closed and locked state, open and lock the opening and closing mechanism; The step of closing and locking the opening and closing mechanism comprises: Sending a reversing signal to the two-position five-way valve through an intermediate relay puts it in a closed state and locks the opening and closing mechanism; The pressure of the actuator cylinder is adjusted to the point where the opening and closing mechanism can operate smoothly through the air supply of the pressure reducing valve. The operating speed is adjusted by the one-way throttle valve, so that the actuator cylinder push rod moves forward, the left and right doors are closed and locked, and the limit switch action of the door closing position is triggered. The limit switch feedbacks the closed and locked state. The pressure reducing valve increases the pressure to keep the actuator cylinder in a pressure-maintaining state, and has sufficient clamping force to resist the influence of wind pressure; The steps of opening and locking the opening and closing mechanism include: Sending a reversing signal to the two-position five-way valve through an intermediate relay makes it open and locks the opening and closing mechanism; The pressure of the actuator cylinder is adjusted through the air pressure reducing valve to ensure smooth operation of the opening and closing mechanism. The operating speed is adjusted by the one-way throttle valve, causing the actuator cylinder push rod to run backward, and the left and right doors are opened and locked, triggering the limit switch to open the door into position, and the limit switch feedbacks the open and locked state.

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