A cab interior pressure adjusting device for opening and closing a cab door, a cab door automatic opening and closing device, and a control method

Abstract

The application provides a cab pressure regulating device for opening and closing a cab door, an automatic cab door opening and closing device and a control method, and solves the problem that the door is difficult to close due to the increase of the indoor pressure when the door is closed. The cab pressure regulating device comprises a pressure control valve for connecting or blocking the air pressure in the cab with the atmosphere; the pressure control valve is used for being opened when the cab door is closed, connecting the air pressure in the cab with the atmosphere, so as to reduce the air pressure in the cab. The cab pressure regulating device can realize the linkage opening and closing of the pressure regulating valve of the cab when the door is closed, automatically adjust the indoor pressure of the cab, and make the closing of the cab door easier.

Description

Technical Field

[0001] This invention relates to an in-cab pressure regulating device, an automatic opening and closing device for the cab door, and a control method for opening and closing the cab door, specifically relating to the excavator cab system and belonging to the field of construction machinery. Background Technology

[0002] As excavator operators become increasingly younger, their demands for the intelligence and convenience of the cab system are also rising. Since excavator operators need to frequently enter and exit the cab during a day's work, the intelligence and convenience of the cab system directly affect the overall comfort of the cab system.

[0003] The existing excavator cab system requires manual opening and closing of the cab door. As the cab's sealing has improved, the increased pressure inside the cab when closing the door makes it difficult to close, requiring force to close it or opening a window before closing the door, which has drawn considerable complaints from operators.

[0004] In the existing technology, the cab door is opened and closed manually, the door lock is controlled by a mechanical linkage structure, and the positioning lock is controlled by a mechanical cable structure; the pressure inside the cab cannot be automatically controlled. When the driver is inside the cab, to open the door, they must first manually pull the inner door handle. The inner handle opens the door lock via a linkage. The driver then manually pushes the door open 180°, where it is locked by a positioning lock on the rear side of the cab. To close the door, they must first manually press the positioning lock handle. The positioning lock opens via a pull cable. The driver then manually pulls the door until it is fully closed. As the door closes, the door lock bolt engages with the bolt, locking the door. No valves regulating the cabin pressure open or close during the entire closing process.

[0005] When the driver is outside, to open the door, they must first manually pull the outer door handle. The outer door handle opens the door lock via a linkage. The driver then manually pulls the door open 180°, where it is locked by a positioning lock on the rear side of the driver's side. To close the door, they must first manually press the positioning lock handle. The positioning lock opens via a pull cable. The driver then manually pulls the door fully closed. As the door closes, the door lock tongue engages with the bolt, locking the door. No valves regulating the interior pressure are opened or closed during the entire closing process.

[0006] However, existing technologies have the following differences:

[0007] (1) When the cab door is open, the driver needs to lean out of the cab to pull the door when he is sitting in the cab and closing it manually, which is particularly strenuous and inconvenient. (2) The door lock is controlled by a mechanical linkage. The shape, precision and consistency of the linkage determine the opening and closing accuracy and reliability of the door lock. The linkage needs to be adjusted frequently, and the consistency is poor. (3) The opening and closing control of the positioning is mechanical pull-wire control. The pull-wire structure often fails to move due to ice forming around the pull-wire in winter, causing the door to fail to open and close. (4) As the sealing of the cab improves, the pressure inside the cab increases when closing the door, making it difficult to close the door. It is necessary to close the door forcefully or open the window before closing the door. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cab pressure regulating device, an automatic cab door opening and closing device, and a control method for opening and closing cab doors, thereby solving the problem of difficulty in closing the door due to increased cab pressure when closing.

[0009] To achieve the above objectives, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a driver's cab pressure regulating device for opening and closing the driver's cab door, the driver's cab pressure regulating device including a pressure control valve for connecting or closing the air pressure inside the driver's cab with the outside atmosphere; The pressure control valve is used to open when the cab door is closed, connecting the air pressure inside the cab with the outside atmosphere, thereby reducing the air pressure inside the cab.

[0010] The above settings achieve the following effect: As the sealing of the cab improves, the increased pressure inside the cab when closing the door makes it difficult to close, requiring force to close or opening the window before closing the door. The cab pressure regulating device of the present invention can realize the linkage opening and closing of the cab pressure regulating valve when the door is closed, automatically adjusting the pressure inside the cab, making it easier to close the cab door.

[0011] In a second aspect, the present invention provides an automatic opening and closing device for a driver's cab door, comprising an instruction input module, a signal receiving module, a control module, a door opening and closing actuator, and a pressure control valve; The instruction input module is connected to the signal receiving module, the signal receiving module is connected to the control module, and the control module is connected to the door opening and closing actuator and the pressure control valve respectively. The instruction input module is used to input an open door instruction or a close door instruction to the control module through the signal receiving module; The control module is used to control the door opening and closing actuator to open or close the car door according to the door opening command or door closing command; The pressure control valve is connected to the control module and is used to connect or close the air pressure inside the cab with the outside atmosphere. When the door opening and closing actuator closes the cab door, the control module controls the pressure control valve to open, connecting the air pressure inside the cab with the outside atmosphere, thereby reducing the air pressure inside the cab.

[0012] The above settings achieve the following effect: As the sealing of the cab improves, the increased pressure inside the cab when closing the door makes it difficult to close, requiring force to close or opening the window before closing the door. The pressure control valve of this invention can realize the linkage opening and closing of the cab pressure regulating valve when the door is closed, automatically adjusting the pressure inside the cab, making it easier to close the cab door.

[0013] Meanwhile, this invention can automatically open or close the cab door, eliminating the need to manually pull the door lock handle; in conjunction with the pressure control valve to regulate the cab pressure, it can make the opening and closing of the cab door smoother, preventing the door opening and closing actuator from being unable to fully lock the door when automatically closing due to excessive air pressure in the cab.

[0014] Furthermore, the instruction input module includes: The interior door opening button is located in the driver's cab and can send an opening command to the signal receiving module in response to a pressing action; The outdoor door opening button is located outside the driver's side and can send an opening command to the signal receiving module in response to a pressing action; The interior door closing button is located in the driver's cab and can send a door closing command to the signal receiving module in response to a pressing action; The outdoor door closing button is located outside the driver's side and can send a door closing command to the signal receiving module in response to a pressing action.

[0015] The effect achieved by the above settings is that by separating the indoor and outdoor buttons, when the driver is in the driver's cab or the driver's cab and needs to close the door, a series of actions such as opening or closing the door can be achieved with just one button command. Furthermore, the door opening and closing actuator is also connected to a signal receiving module, which is used to feed back the execution result signal to the control module through the signal receiving module; The door opening and closing mechanism includes an electronic door lock, an electronic positioning lock, and an electronic hinge; The electronic door lock is installed on the cab door. When it contacts the bolt installed on the door frame, it closes and locks the cab door relative to the door frame, and can feed back a door lock open signal or a door lock closed signal to the control module. The electronic positioning lock is located on the left rear side of the cab. When it contacts the bolt on the cab door, it locks the cab door when it is open and can send a signal that the positioning lock is open or locked to the control module. The electronic hinge is installed on the cab door to drive the rotation of the cab door and can feed back the forward rotation signal or the reverse rotation signal of the hinge to the control module. When the control module receives the door opening command, it controls the electronic door lock to unlock. After receiving the door lock open signal, it controls the electronic hinge to rotate forward, driving the cab door to open. When the door is fully open, the electronic positioning lock contacts the bolt set on the door, the electronic positioning lock locks and sends a positioning lock locked signal to the control module. After receiving the positioning lock locked signal, the control module controls the electric hinge to stop rotating. When the control module receives a door closing command, it controls the electronic hinge to rotate in the opposite direction. After receiving a signal that the hinge is rotating in the opposite direction, it controls the pressure regulating valve to open. When the door is fully closed, the electric door lock contacts the bolt set on the door frame, the electronic door lock locks and sends a door lock signal to the control module. After receiving the door lock signal, the control module controls the electric hinge to stop rotating and controls the pressure regulating valve to close.

[0016] The above settings achieve the following effects: when the driver needs to close the door in the driver's cab, a single command can automatically activate the positioning lock, start the door's automatic rotation, open the pressure regulating valve, lock the door after it closes, stop the door's automatic rotation, and close the pressure regulating valve.

[0017] Furthermore, the automatic opening and closing device for the driver's cab door also includes a distance measuring sensor connected to the signal receiving module, used to detect the distance between the left side of the driver's cab and the obstacle; When the control module receives the door opening command, the electronic door lock opens and sends a signal indicating that the door is open back to the signal receiving module. At the same time, the distance sensor feeds back the distance from the left side of the driver's cab to the obstacle to the signal receiving module. The signal receiving module sends the door lock open signal and the distance from the left side of the driver's cab to the control module, which then controls the electric hinge to rotate in the positive direction. If the distance from the left side of the driver's cab to the obstacle is greater than the preset distance L, the door opening angle reaches the preset angle α1, the door bolt contacts the positioning lock and is locked by the electronic positioning lock. After the electronic positioning lock is locked, it will feed back the positioning lock locked signal to the signal receiving module. The signal receiving module sends the positioning lock locked signal to the control module, and the control module controls the electric hinge to stop rotating. If the distance from the left side of the driver's cab to the obstacle is less than or equal to the preset distance L, the control module controls the electronic hinge to open the door to the preset angle α2 and then controls the electronic hinge to stop rotating in the forward direction.

[0018] Furthermore, the preset angle α1 is greater than the preset angle α2.

[0019] Furthermore, when the control module receives the door closing command, the control module obtains the distance from the left side of the driver's cab to the obstacle from the ranging sensor through the signal receiving module; When the distance from the left side of the driver's cab to an obstacle is greater than L, the control module controls the electronic positioning lock to open. At the same time, the electronic positioning lock sends a signal indicating that the positioning lock is open to the signal receiving module, which then sends the signal receiving module back to the control module. The control module controls the electric hinge to rotate in the opposite direction; after the electric hinge starts to rotate, it feeds back the reverse rotation signal to the signal receiving module. The signal receiving module sends the signal that the electric hinge has been opened and is rotating in the opposite direction to the control module, and the control module controls the pressure regulating valve to open. When the door is fully closed, the electronic door lock contacts and locks against the bolt on the door frame. After locking, the electronic door lock sends a locked signal back to the signal receiving module. The signal receiving module then sends the locked signal to the control module, which controls the electric hinge to stop rotating and simultaneously controls the pressure regulating valve to close.

[0020] When the distance from the left side of the driver's cab to an obstacle is ≤L, the control module outputs an alarm message to indicate that the distance is too close and the vehicle's parking position needs to be adjusted.

[0021] Thirdly, the present invention provides an automatic opening and closing control method for a cab door, based on the automatic opening and closing device for a cab door described in the second aspect, comprising the following steps: The door opening or closing command is obtained through the signal receiving module; According to the door opening command or door closing command, control the door opening and closing actuator to open or close the vehicle door; When the door opening and closing actuator closes the cab door, the control pressure valve opens, connecting the air pressure inside the cab with the outside atmosphere, thereby adjusting the pressure inside the cab.

[0022] Furthermore, the door opening and closing actuator includes an electronic door lock, an electronic positioning lock, and an electronic hinge; The method for controlling the door opening / closing actuator to open or close the vehicle door according to the door opening command or door closing command includes: When a door opening command is received, the electronic door lock is unlocked; after receiving a signal that the door lock has been opened, the electronic hinge is rotated in the forward direction. Upon receiving a signal that the positioning lock has engaged, the electric hinge is controlled to stop rotating. When a door closing command is received, the electronic hinge is controlled to rotate in the opposite direction; Upon receiving a signal that the door lock is engaged, the system controls the electric hinge to stop rotating and closes the pressure regulating valve.

[0023] Furthermore, the method for controlling the door opening / closing actuator to open or close the vehicle door according to the door opening command or door closing command includes: Obtain the distance from the left side of the driver's cab to the obstacle; When a door opening command is received, the electric hinge is controlled to rotate in the forward direction. If the distance from the left side of the driver's cab to the obstacle is greater than the preset distance L, the electronic positioning lock is controlled to lock. After receiving the locking signal, the electric hinge is controlled to stop rotating. If the distance from the left side of the driver's cab to the obstacle is less than or equal to the preset distance L, the electric hinge is controlled to stop rotating in the forward direction when the door opening angle reaches the preset angle α2.

[0024] When a door closing command is received, if the distance from the left side of the driver's cab to the obstacle is greater than L, the electronic positioning lock is opened. After receiving a signal that the positioning lock is open, the electric hinge is rotated in the opposite direction. After receiving a signal that the hinge is rotated in the opposite direction, the pressure regulating valve is opened. After receiving a signal that the door lock is locked, the electric hinge is stopped rotating, and the pressure regulating valve is closed. If the distance from the left side of the driver's cab to the obstacle is less than or equal to L, the control module outputs an alarm message to indicate that the distance is too close and the vehicle parking position needs to be adjusted.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: (1) The present invention can realize one-button automatic opening or closing of the cab door lock, eliminating the need to manually pull the door lock handle; (2) The present invention can realize one-button automatic opening or closing of the cab positioning lock, eliminating the need to manually pull the positioning lock handle; (3) The present invention can realize the automatic rotation of the cab door, eliminating the need for manual pushing or pulling of the door; (4) The present invention can realize the linkage opening and closing of the cab pressure regulating valve when the door is closed, automatically adjust the pressure inside the cab, and make the cab door easier to close; Attached Figure Description

[0026] Figure 1 Diagram showing the information transmission between automatic opening and closing of the driver's cab door and the linkage control of indoor pressure. Figure 2 Logic diagram for automatic opening of the driver's cab door; Figure 3 Logic diagram for automatic door closing and indoor pressure linkage control of the driver's cab. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0028] This embodiment provides a driver's cab pressure regulating device for opening and closing the driver's cab door. The driver's cab pressure regulating device includes a pressure control valve for connecting or closing the air pressure inside the driver's cab with the outside atmosphere. The pressure control valve is used to open when the cab door is closed, connecting the air pressure inside the cab with the outside atmosphere, thereby reducing the air pressure inside the cab.

[0029] The device in this embodiment is specifically designed to solve the problem of opening and closing the driver's cab door. As the sealing of the cab improves, the increased pressure inside the cab when closing the door makes it difficult to close, requiring force to close or opening the window before closing the door. The cab pressure regulating device of this invention can realize the linkage opening and closing of the cab pressure control valve when the door is closed, automatically adjusting the pressure inside the cab, making it easier to close the cab door.

[0030] Preferably, the pressure regulating device in the cab also includes an active exhaust fan, which is installed in a pipe connecting the air pressure inside the cab to the outside atmosphere. This fan is used to actively exhaust air from the cab when the door is closed, creating a negative pressure environment inside the cab. This makes it easier and more convenient to close the cab door, requiring less force to close it securely. Furthermore, when automatic control is performed, the closing force required for the electric hinges is lower, which helps to improve the level of automation and the automatic closing effect.

[0031] Example 2: This embodiment provides an automatic opening and closing device for the cab door, which can realize the automatic opening or closing of the cab door, eliminating the need to manually pull the door lock handle; in conjunction with the pressure control valve to regulate the pressure in the cab, the opening and closing of the cab door can be made smoother, and prevent the door opening and closing actuator from being unable to completely lock the door when automatically closing due to excessive air pressure in the cab.

[0032] Specifically, door opening and closing mechanisms include electronic door locks, electronic positioning locks, and electric hinges.

[0033] Specifically, both the door lock and the positioning lock are electronic locks, the door hinges are electric hinges that can rotate in both directions, and the pressure regulating valve is an electrically controlled valve. The rotation of the electric hinges and the opening and closing of the cab pressure regulating valve are controlled by the opening or closing signals of the door lock and the positioning lock, thereby achieving automatic opening and closing of the cab door and linkage control of the pressure regulating valve.

[0034] Overall, such as Figure 1 As shown, this device includes an electronically controlled door lock system and an electronically controlled positioning lock system capable of automatic opening and locking; a distance sensor capable of detecting the distance between the left side of the cab and an obstacle; an electric door hinge capable of automatic rotation and stopping; an electric pressure regulating valve capable of automatic opening and closing; an indoor door opening / closing button; an outdoor door opening / closing button; a signal receiving module capable of receiving signals; and a programmable control module for controlling each actuator. like Figure 2As shown, when the driver needs to open the door from inside the cab, they press the one-button door opening command. The signal receiving module receives the one-button door opening signal and forwards it to the control module. The control module then controls the electronic door lock in the cab to open. After the electronic door lock opens, it sends a signal indicating that the door is open back to the signal receiving module. At the same time, the distance sensor sends the distance data from the left side of the cab to the obstacle back to the signal receiving module. The signal receiving module sends the door lock opening information and distance information to the control module, which then controls the electric hinge to rotate in the forward direction. When the distance from the left side of the cab to the obstacle is greater than L, the door opening angle is controlled to approach α1, at which point the door bolt contacts the positioning lock on the left rear side of the cab and is locked by the electronic positioning lock. After the electronic positioning lock is locked, it sends a signal indicating that the positioning lock is locked back to the signal receiving module. The signal receiving module then sends the positioning lock locking information to the control module, which then controls the electric hinge to stop rotating. When the distance from the left side of the cab to the obstacle is less than or equal to L, the door opening angle is controlled to approach α2, at which point the forward rotation of the hinge stops. The door is then closed after the driver gets out of the vehicle.

[0035] like Figure 2 As shown, when the driver needs to open the door from outside the cab, they press the one-button door opening command. The signal receiving module receives the one-button door opening signal and forwards it to the control module. The control module then controls the electronic door lock in the cab to open. After the electronic door lock is opened, it sends a signal indicating that the door is open back to the signal receiving module. At the same time, the distance sensor sends the distance data between the left side of the cab and the obstacle back to the signal receiving module. The signal receiving module sends the door lock opening information and distance information to the control module, which then controls the electric hinge to rotate in the forward direction. When the distance between the left side of the cab and the obstacle is greater than L, the door opening angle is controlled to approach α1, at which point the door bolt contacts the positioning lock on the left rear side of the cab and is locked by the electronic positioning lock. After the electronic positioning lock is locked, it sends a signal indicating that the positioning lock is locked back to the signal receiving module. The signal receiving module then sends the positioning lock locking information to the control module, which then controls the electric hinge to stop rotating. When the distance between the left side of the cab and the obstacle is less than or equal to L, the door opening angle is controlled to approach α2, at which point the forward rotation of the hinge stops. After the driver gets into the vehicle, the door is then closed.

[0036] like Figure 3As shown, when the driver needs to close the door from inside the cab, they press the one-button door-closing command. Simultaneously, the distance sensor sends the distance data from the left side of the cab to the obstacle to the signal receiving module. The signal receiving module forwards the one-button door-closing information and distance information to the control module. The control module controls the electronic positioning lock. When the distance from the left side of the cab to the obstacle is greater than L, the electronic positioning lock opens and sends a signal indicating that the positioning lock is open back to the signal receiving module. The signal receiving module then sends the information to the control module, which controls the electric hinge to rotate in the opposite direction. After the electric hinge starts rotating, it sends a signal back to the signal receiving module, which then sends the information indicating that the electric hinge is open and rotating in the opposite direction back to the control module. The control module then opens the pressure regulating valve. When the door closes, the door lock contacts and locks against the bolt on the door frame. After the electronic door lock locks, it sends a signal back to the signal receiving module, which then sends the information indicating that the door lock is locked back to the control module. The control module then stops the electric hinge from rotating and closes the pressure regulating valve. When the distance from the left side of the cab to the obstacle is less than or equal to L, the system will issue an alarm indicating that the distance is too close and the vehicle's parking position needs to be adjusted.

[0037] like Figure 3 As shown, when the driver needs to close the door from outside the cab, they press the one-button door-closing command. Simultaneously, the distance sensor sends the distance data from the left side of the cab to the obstacle to the signal receiving module. The signal receiving module forwards the one-button door-closing information and distance information to the control module. The control module controls the electronic positioning lock. When the distance from the left side of the cab to the obstacle is greater than L, the electronic positioning lock opens and sends an open signal back to the signal receiving module. The signal receiving module then sends the open information to the control module, which controls the electric hinge to rotate in the opposite direction. After the electric hinge starts rotating, it sends a signal back to the signal receiving module, which then sends the open and reverse-rotation information back to the control module. The control module then opens the pressure regulating valve. When the door closes, the door lock contacts and locks against the bolt on the door frame. After the electronic door lock locks, it sends a signal back to the signal receiving module, which then sends the locked information back to the control module. The control module stops the electric hinge from rotating and simultaneously closes the pressure regulating valve. When the distance from the left side of the cab to the obstacle is less than or equal to L, the system will issue an alarm indicating that the distance is too close and the vehicle's parking position needs to be adjusted. Example

[0038] This embodiment provides an automatic opening and closing control method for the cab door, based on the automatic opening and closing device for the cab door described in Embodiment 2, such as... Figure 2-3 As shown, it includes the following steps: The door opening or closing command is obtained through the signal receiving module; According to the door opening command or door closing command, control the door opening and closing actuator to open or close the vehicle door; When the door opening and closing actuator closes the cab door, the control pressure valve opens, connecting the air pressure inside the cab with the outside atmosphere, thereby adjusting the pressure inside the cab.

[0039] The method for controlling the door opening / closing actuator to open or close the vehicle door according to the door opening command or door closing command includes: When a door opening command is received, the electronic door lock is unlocked; after receiving a signal that the door lock has been opened, the electronic hinge is rotated in the forward direction. Upon receiving a signal that the positioning lock has engaged, the electric hinge is controlled to stop rotating. When a door closing command is received, the electronic hinge is controlled to rotate in the opposite direction; Upon receiving a signal that the door lock is engaged, the system controls the electric hinge to stop rotating and closes the pressure regulating valve.

[0040] Obtain the distance from the left side of the driver's cab to the obstacle; When a door opening command is received, the electric hinge is controlled to rotate in the forward direction. If the distance from the left side of the driver's cab to the obstacle is greater than the preset distance L, the electronic positioning lock is controlled to lock. After receiving the locking signal, the electric hinge is controlled to stop rotating. If the distance from the left side of the driver's cab to the obstacle is less than or equal to the preset distance L, the electric hinge is controlled to stop rotating in the forward direction when the door opening angle reaches the preset angle α2.

[0041] When a door closing command is received, if the distance from the left side of the driver's cab to the obstacle is greater than L, the electronic positioning lock is opened. After receiving a signal that the positioning lock is open, the electric hinge is rotated in the opposite direction. After receiving a signal that the hinge is rotated in the opposite direction, the pressure regulating valve is opened. After receiving a signal that the door lock is locked, the electric hinge is stopped rotating, and the pressure regulating valve is closed. If the distance from the left side of the driver's cab to the obstacle is less than or equal to L, the control module outputs an alarm message to indicate that the distance is too close and the vehicle parking position needs to be adjusted.

[0042] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0043] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0044] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0045] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic opening and closing device for a driver's cab door, characterized in that, It includes an instruction input module, a signal receiving module, a control module, a door opening and closing actuator, and a pressure control valve; The instruction input module is connected to the signal receiving module, the signal receiving module is connected to the control module, and the control module is connected to the door opening and closing actuator and the pressure control valve respectively. The instruction input module is used to input an open door instruction or a close door instruction to the control module through the signal receiving module; The control module is used to control the door opening and closing actuator to open or close the car door according to the door opening command or door closing command; The pressure control valve is connected to the control module and is used to connect or close the air pressure in the driver's cab to the outside atmosphere. When the door opening and closing actuator closes the cab door, the control module controls the pressure control valve to open, connecting the air pressure inside the cab with the outside atmosphere, thereby reducing the air pressure inside the cab. The door opening and closing actuator is also connected to a signal receiving module, which is used to feed back the execution result signal to the control module through the signal receiving module; The door opening and closing mechanism includes an electronic door lock, an electronic positioning lock, and an electronic hinge; The electronic door lock is installed on the cab door. When it contacts the bolt installed on the door frame, it closes and locks the cab door relative to the door frame, and can feed back a door lock open signal or a door lock closed signal to the control module. The electronic positioning lock is located on the left rear side of the cab. When it contacts the bolt on the cab door, it locks the cab door when it is open and can send a signal that the positioning lock is open or locked to the control module. The electronic hinge is installed on the cab door to drive the rotation of the cab door and can feed back the forward rotation signal or the reverse rotation signal of the hinge to the control module. When the control module receives the door opening command, it controls the electronic door lock to unlock. After receiving the door lock open signal, it controls the electronic hinge to rotate forward, driving the cab door to open. When the door is fully open, the electronic positioning lock contacts the bolt set on the door, the electronic positioning lock locks and sends a positioning lock locked signal to the control module. After receiving the positioning lock locked signal, the control module controls the electric hinge to stop rotating. When the control module receives a door closing command, it controls the electronic hinge to rotate in the opposite direction. After receiving a signal that the hinge is rotating in the opposite direction, it controls the pressure regulating valve to open. When the door is fully closed, the electric door lock contacts the bolt set on the door frame, the electronic door lock locks and sends a door lock signal to the control module. After receiving the door lock signal, the control module controls the electric hinge to stop rotating and controls the pressure regulating valve to close.

2. The automatic opening and closing device for the driver's cab door according to claim 1, characterized in that, The instruction input module includes: The interior door opening button is located in the driver's cab and can send an opening command to the signal receiving module in response to a pressing action; The outdoor door opening button is located outside the driver's side and can send an opening command to the signal receiving module in response to a pressing action; The interior door closing button is located in the driver's cab and can send a door closing command to the signal receiving module in response to a pressing action; The outdoor door closing button is located outside the driver's side and can send a door closing command to the signal receiving module in response to a pressing action.

3. The automatic opening and closing device for the driver's cab door according to claim 1, characterized in that, The automatic opening and closing device for the driver's cab door also includes a distance sensor connected to the signal receiving module, used to detect the distance between the left side of the driver's cab and the obstacle. When the control module receives the door opening command, the electronic door lock opens and sends a signal indicating that the door is open back to the signal receiving module. At the same time, the distance sensor feeds back the distance from the left side of the driver's cab to the obstacle to the signal receiving module. The signal receiving module sends the door lock open signal and the distance from the left side of the driver's cab to the control module, which then controls the electric hinge to rotate in the positive direction. If the distance from the left side of the driver's cab to the obstacle is greater than the preset distance L, when the door opening angle reaches the preset angle α1, the door bolt contacts the positioning lock and is locked by the electronic positioning lock. After the electronic positioning lock is locked, it will send the positioning lock locked signal back to the signal receiving module. The signal receiving module will send the positioning lock locked signal to the control module, and the control module will control the electric hinge to stop rotating. If the distance from the left side of the driver's cab to the obstacle is less than or equal to the preset distance L, the control module controls the electronic hinge to open the door to the preset angle α2 and then controls the electronic hinge to stop rotating in the forward direction.

4. The automatic opening and closing device for the driver's cab door according to claim 3, characterized in that, The preset angle α1 is greater than the preset angle α2.

5. The automatic opening and closing device for the driver's cab door according to claim 3, characterized in that, When the control module receives the door closing command, the control module obtains the distance from the left side of the driver's cab to the obstacle from the distance sensor through the signal receiving module; When the distance from the left side of the driver's cab to an obstacle is greater than L, the control module controls the electronic positioning lock to open. At the same time, the electronic positioning lock sends a signal indicating that the positioning lock is open to the signal receiving module, which then sends the signal receiving module back to the control module. The control module controls the electric hinge to rotate in the opposite direction; after the electric hinge starts to rotate, it feeds back the reverse rotation signal to the signal receiving module. The signal receiving module sends the signal that the electric hinge has been opened and is rotating in the opposite direction to the control module, and the control module controls the pressure regulating valve to open. When the door is fully closed, the electronic door lock contacts and locks against the bolt on the door frame. After locking, the electronic door lock sends a locked signal back to the signal receiving module. The signal receiving module then sends the locked signal to the control module, which controls the electric hinge to stop rotating and simultaneously controls the pressure regulating valve to close. When the distance from the left side of the driver's cab to an obstacle is ≤L, the control module outputs an alarm message to indicate that the distance is too close and the vehicle's parking position needs to be adjusted.

6. A method for automatically opening and closing a cab door, based on the automatic opening and closing device for a cab door as described in claim 1, comprising the following steps: The door opening or closing command is obtained through the signal receiving module; According to the door opening command or door closing command, control the door opening and closing actuator to open or close the vehicle door; When the door opening and closing actuator closes the cab door, the control pressure valve opens, connecting the air pressure inside the cab with the outside atmosphere, thereby adjusting the pressure inside the cab.

7. The automatic opening and closing control method for the driver's cab door according to claim 6, characterized in that, The door opening and closing mechanism includes an electronic door lock, an electronic positioning lock, and an electronic hinge; The method for controlling the door opening / closing actuator to open or close the vehicle door according to the door opening command or door closing command includes: When a door opening command is received, the electronic door lock is unlocked; after receiving a signal that the door lock has been opened, the electronic hinge is rotated in the forward direction. Upon receiving a signal that the positioning lock has engaged, the electric hinge is controlled to stop rotating. When a door closing command is received, the electronic hinge is controlled to rotate in the opposite direction; Upon receiving a signal that the door lock is engaged, the system controls the electric hinge to stop rotating and closes the pressure regulating valve.

8. The automatic opening and closing control method for the driver's cab door according to claim 7, characterized in that, The method for controlling the door opening / closing actuator to open or close the vehicle door according to the door opening command or door closing command includes: Obtain the distance from the left side of the driver's cab to the obstacle; When a door opening command is received, the electric hinge is controlled to rotate in the positive direction. If the distance from the left side of the driver's cab to the obstacle is greater than the preset distance L, the electronic positioning lock is controlled to lock. After receiving the locking signal, the electric hinge is controlled to stop rotating. If the distance from the left side of the driver's cab to the obstacle is less than or equal to the preset distance L, the electric hinge is controlled to stop rotating in the positive direction when the door opening angle reaches the preset angle α2. When a door closing command is received, if the distance from the left side of the driver's cab to the obstacle is greater than L, the electronic positioning lock is opened. After receiving a signal that the positioning lock is open, the electric hinge is rotated in the opposite direction. After receiving a signal that the hinge is rotated in the opposite direction, the pressure regulating valve is opened. After receiving a signal that the door lock is locked, the electric hinge is stopped rotating, and the pressure regulating valve is closed. If the distance from the left side of the driver's cab to the obstacle is less than or equal to L, the control module outputs an alarm message to indicate that the distance is too close and the vehicle parking position needs to be adjusted.

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