Swing door driving mechanism with locking keeping function

Abstract

The utility model discloses a swing door driving mechanism with a locking keeping function, which comprises a driving component, and the two sides of the driving component drive a door leaf stand column component to rotate through a connecting rod component and a swing rod which are connected in sequence. The driving assembly comprises a motor, a gear assembly, a brake for controlling the motor, a door controller for controlling the brake to brake or not, and an air cylinder assembly; the motor gear is meshed with the gear assembly to transmit driving force to the connecting rod assembly, a brake is arranged at the tail of the motor, an air cylinder assembly is arranged on the side wall of the motor, a piston rod of the air cylinder assembly is close to an unlocking piece of the brake, and when the piston rod of the air cylinder assembly stretches out, the unlocking piece is triggered, and the brake shields signal unlocking of the door controller. When the vehicle runs normally, the door leaf closing state can be effectively maintained, and the door leaf is prevented from being opened abnormally.

Description

Technical Field

[0001] The utility model relates to an automatic door driving mechanism, in particular to a swing door driving mechanism with a locking and holding function. Background Art

[0002] In the field of passenger doors for buses, inward swing doors have the advantages of simple structure and low cost, and are widely used. At present, the inward swing door structures on the market can be divided into two types: electric and pneumatic. The locking method is mainly active locking, and additional pneumatic components or electrical components are required to achieve door locking. For example, the two electric swing door drive mechanisms disclosed in the utility models with patent numbers CN216866383U and CN210067792U use a self-locking motor as a driving source to achieve full locking during the movement of the door leaf, and use a motor swing scheme to achieve the clutch of the locking motor gear and the main gear to meet the needs of emergency unlocking of the door system. The locking principle of the above locking scheme is simple, but when the vehicle is driving, if there is a cylinder leak or the tension spring fails, the locking motor will be separated from the main gear, so that the door system cannot maintain a locked state and will open abnormally, threatening the personal safety of vehicle passengers. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a safer swing door drive mechanism with a locking and holding function.

[0004] Technical solution: The utility model describes a swing door drive mechanism with a locking and holding function, comprising a drive assembly, wherein the door leaf column assemblies on both sides of the drive assembly are driven to rotate through a connecting rod assembly and a swing rod connected in sequence, wherein the drive assembly comprises a motor, a gear assembly, a brake for controlling the motor, a door controller for controlling whether the brake is applied, and a cylinder assembly; the motor gear is meshed with the gear assembly to transmit driving force to the connecting rod assembly, a brake is provided at the rear of the motor, and a cylinder assembly is provided on the side wall, wherein the piston rod of the cylinder assembly is close to the unlocking plate of the brake, and when the piston rod of the cylinder assembly is extended, the unlocking plate is triggered, and the brake shields the door controller signal to unlock.

[0005] Preferably, a driving pin is symmetrically arranged on the center of the gear assembly body, and the driving pin is connected to the connecting rod assembly.

[0006] Preferably, the dead point reference line is taken as the center line of the connecting rod assembly passing through the rotation center of the gear assembly. When the door leaf is closed, the angle between the line connecting the center of the drive shaft and the rotation center of the gear assembly and the dead point reference line is 3° to 30°.

[0007] Preferably, the drive assembly also includes an upper mounting plate, the motor is fixedly connected to the upper part of the upper mounting plate, the gear assembly is arranged below the upper mounting plate, and is rotatably connected to the upper mounting plate through the main shaft, the gear assembly body is provided with a limiting slot, and the upper mounting plate is provided with a limiting pin extending into the slot.

[0008] Preferably, a sensing pin is provided on the upper surface of the gear assembly, and the upper mounting plate is provided with a switch assembly that cooperates with the sensing pin to detect the closed state of the door leaf.

[0009] Preferably, the cylinder assembly comprises a cylinder, the cylinder has a rod cavity provided with a joint, and an unlocking spring is sleeved on the piston rod.

[0010] Preferably, the motor is a reduction motor, and a Hall sensor is provided inside the motor.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. The motor output end is always connected to the driving component. In the case of abnormal locking such as insufficient air pressure or air leakage, the motor can drive the door leaf to remain in a closed state to avoid abnormal opening of the door leaf; 2. A non-self-locking reduction motor is used as the driving source, and an independent locking unit is used to separate the driving function from the locking function, thereby reducing maintenance and repair costs; 3. The locking unit adopts a cylinder air-off unlocking structure, which only maintains the release state during the door opening and closing process, effectively reducing energy consumption, It can also meet the needs of remote unlocking of buses. At the same time, according to the signal of the door controller, the locking unit can maintain the brake lock when it stops at any position during the door opening and closing process, that is, it meets the full locking requirements; 4. The drive assembly is connected to the columns on both sides through a connecting rod, and the connecting rod structure is used to achieve a near dead point, so that both the closed and open positions obtain an equivalent large reduction ratio, while the middle section is maintained at a smaller value, thereby reducing the impact of the door opening and closing starting torque and the vehicle vibration on the locking unit, effectively reducing energy consumption, improving the force of the locking unit, and having high working efficiency, long service life and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the free state of the driving mechanism of the utility model;

[0013] Figure 2 This is a schematic diagram of the door closing and locking state of the driving mechanism of the utility model;

[0014] Figure 3 This is a schematic diagram of the door opening and locking state of the drive mechanism of the utility model;

[0015] Figure 4 This is a schematic diagram of the driving mechanism structure of the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the middle drive assembly of the utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the motor assembly of the utility model;

[0018] Figure 7 This is a schematic diagram of the gear assembly structure of the utility model;

[0019] Figure 8 This is a schematic diagram of the structure of the cylinder assembly of the utility model;

[0020] Fig. 9 This is a schematic diagram of the motor structure of the utility model;

[0021] Fig.10 This is a schematic diagram of the gear assembly structure of the utility model;

[0022] Fig.11 It is a schematic diagram of the dead point reference line, near dead point and angle of the utility model;

[0023] Fig.12 It is a schematic diagram of the reduction ratio of the utility model. DETAILED DESCRIPTION

[0024] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0025] The swing door driving mechanism with locking and holding function is mainly composed of a frame 1, a left mounting frame 2, a right mounting frame 3, a swing rod 4, a middle driving assembly 5, a connecting rod assembly 6, a column 7 and a door controller 8.

[0026] The frame 1 is fixedly connected to the vehicle body through the left and right mounting frames 2 and 3. The two ends of the frame 1 are rotatably connected to the columns 7. The columns 7 are used to connect to the door leaf and drive the door leaf to move. The swing rod 4 is fixedly connected to the columns 7. The two ends of the connecting rod assembly 6 are respectively connected to the swing rod 4 and the middle driving assembly 5 to transmit the driving force to the columns 7 to realize the opening and closing movement of the door leaf.

[0027] The middle driving assembly 5 includes an upper mounting plate 9 , a limit pin 10 , a gear assembly 11 , a motor assembly 12 and a switch assembly 13 .

[0028] The upper mounting plate 9 is mounted in the middle of the frame 1, and its mounting surface is provided with a through shaft hole and a stop pin 10, and the shaft hole is used to install the gear assembly 11. The motor assembly 12 is installed on one side of the shaft hole, and the switch assembly 13 is installed on the other side.

[0029] The gear assembly 11 is installed between the upper mounting plate 9 and the frame 1 through the main shaft 1101. The gear assembly 11 is meshed with the motor assembly 12 to output motor power. The gear assembly 11 is provided with a driving pin 1104 symmetrically on the center, and a limiting notch 1102 on one side. The driving pin 1104 is connected to the connecting rod assembly 6. When the gear assembly 11 rotates, the notch 1102 allows the limiting pin 10 to pass through. The upper surface of the gear assembly 11 is provided with a sensing pin 1103. The sensing pin 1103 rotates with the gear assembly 11, approaches or moves away from the switch assembly 13, indicates the rotation state of the gear assembly 11, and thus indicates the closed state of the door leaf.

[0030] The motor assembly 12 includes a cylinder assembly 14, a motor 15, a mounting seat 16 and a brake 17. The brake 17 is fixedly mounted at the rear of the motor 15 housing, and the brake is controlled by the door controller 8. The motor assembly 12 is fixed to the upper mounting plate 9 through the mounting seat 16, and the motor gear 1501 contacts and meshes with the gear assembly 11.

[0031] The cylinder assembly 14 includes a cylinder 1401 and a mounting frame. The rear end of the cylinder barrel of the cylinder 1401 is fixedly connected to the mounting frame. The piston rod is connected to the mounting frame through a bracket, and the piston rod can slide forward and backward along the bracket. An unlocking compression spring 1402 is mounted on the piston rod between the bracket and the cylinder barrel. The cylinder assembly 14 is fixedly mounted on the side of the motor 15 housing through the mounting frame. The front end of the piston rod of the cylinder 1401 is close to the unlocking plate 1701 of the brake 17. The two are in virtual contact or have a certain distance. When the piston rod is extended, the brake unlocking plate 1701 can be triggered.

[0032] The rod chamber of the cylinder 1401 is connected to the vehicle's normal air source. When the vehicle is running normally, the rod chamber receives air, the piston rod of the cylinder 1401 retracts, the unlocking compression spring 1402 is compressed to store energy, and the brake 17 is controlled by the door controller 8 to determine whether it is in a braking state. When the air is cut off, the unlocking compression spring 1402 is reset and drives the cylinder 1401 to extend, and the cylinder 1401 pushes the unlocking plate 1701 to put the brake 17 in a mechanical unlocking state, and the motor 15 is unlocked.

[0033] Basic working principle:

[0034] Opening the door:

[0035] 1. Before opening the door: the cylinder 1401 is ventilated, the piston rod retracts, the unlocking compression spring 1402 is compressed to store energy, the brake 17 is in the braking state, and the motor 15 is locked;

[0036] 2. The door controller 8 receives a door opening signal, the brake 17 is powered to cancel the braking state, and the motor 15 is unlocked;

[0037] 3. The motor 15 executes the door opening command, and the motor gear 1501 drives the gear assembly 11 to rotate, and then transmits the driving force to the push swing rod 4 through the connecting rod assembly 6, so that it drives the column 7 to rotate around its own axis to realize the door opening movement;

[0038] 4. When the door leaf is fully opened, the motor 15 stops rotating, the brake 17 is powered off and braked, and the motor 15 is locked.

[0039] close the door:

[0040] 1. The door controller 8 receives a door closing signal, the brake 17 is powered to cancel the braking state, and the motor 15 is unlocked;

[0041] 2. The motor 15 executes the door closing command and drives the gear assembly 11 to rotate in the reverse direction;

[0042] 3. The driving force is transmitted to the push rod 4 through the connecting rod assembly 6, so that it drives the column 7 to rotate around its own axis to achieve the door closing movement.

[0043] 4. When the limit pin 10 approaches the closed stop position, the induction pin 1103 first triggers the switch assembly 13, and the limit pin 10 then contacts the right side of the gear assembly notch 1102, the motor 15 stops rotating, the brake 17 is powered off and braked, and the motor 15 is locked.

[0044] Locking and large reduction ratio:

[0045] 1. The motor 15 is a reduction motor, and the brake 17 can achieve full-range locking. During the door opening and closing process, the brake 17 remains in the released state, and when the door is stopped at the fully closed position or fully opened position, the brake 17 switches to the braking state to achieve locking. At the same time, when the door stops at any position during the door opening and closing process, the brake 17 is braked and locked according to the door controller signal, that is, the full-range locking requirement is met. There are multiple preferred solutions for the brake 17, such as friction type and tooth type clutches, but it is not limited to the above structures.

[0046] 2. If Fig.12 As shown, the center line of the connecting rod assembly 6 is used as the reference line. When the reference line passes through the rotation center of the gear assembly 11, the reference line is the "dead point reference line". When rotating clockwise, the reference line is located above the rotation center of the gear assembly 11, that is, it has not passed the "dead point". A switch assembly 13 is set at the closed position to identify the position, and the limit pin 10 on the right side of the gear assembly notch 1102 is used to limit the final stop position so that it does not pass the dead point but is close to the dead point. At this time, the line connecting the center of the drive shaft 1104 and the rotation center of the gear assembly 11 and the "dead point reference line" have an angle of 3° to 30°. In this way, the force arm of the connecting rod assembly on the side of the gear assembly 11 can be small, while the force arm at the rocker arm 4 can be large to achieve a large reduction ratio for the closed position. The large reduction ratio for the open position is similar to the large reduction ratio for the closed position, and will not be explained here.

[0047] Emergency unlocking: 1. The air is cut off, the unlocking compression spring 1402 releases energy, the piston rod of the cylinder 1401 extends, and the unlocking plate 1701 is pushed to put the brake 17 in a mechanical unlocking state, and the motor 15 is unlocked;

[0048] 3. Push the door manually and open the door leaf to complete emergency unlocking.

[0049] Unexpected door opening: The door system is accidentally unlocked due to a system or component failure. At this time, the door controller 8 does not recognize the emergency unlocking and door opening signals, but the switch component 13 accidentally loses the signal due to the door leaf movement, and then it can be determined that the door system is in an abnormal unlocking state. The door controller 8 controls the motor 15 to rotate and keep the door leaf locked to ensure the safety of passengers.

[0050] Intelligent anti-pinch: A switch assembly 13 is provided on the upper mounting plate 9 . When the door is close to the fully closed state, the induction pin 1103 on the gear assembly 11 will trigger the switch assembly 13 .

[0051] The motor 15 is a reduction motor, and a Hall sensor is provided inside. The Hall sensor can detect the number of rotations and the speed of the motor, and transmit them to the door controller in real time, thereby determining the movement position and state of the door leaf.

[0052] If an obstacle is encountered when opening or closing the door, the current and speed of the motor 15 will change, and the door controller will make a judgment based on the motor speed, current signal, switch signal and door leaf position, thereby realizing the intelligent anti-pinch function.

Claims

1. A swing door driving mechanism with a locking and holding function, comprising a driving assembly (5), wherein the two sides of the driving assembly (5) drive the door leaf column assembly to rotate through a connecting rod assembly (6) and a swing rod (4) connected in sequence, and characterized in that: The driving assembly (5) comprises a motor (15), a gear assembly (11), a brake (17) for controlling the motor (15), a door controller (8) for controlling whether the brake is applied or not, and a cylinder assembly (14); the gear of the motor (15) meshes with the gear assembly (11) to transmit driving force to the connecting rod assembly; a brake (17) is provided at the rear of the motor (15); a cylinder assembly (14) is provided on the side wall; a piston rod of the cylinder assembly (14) is close to an unlocking plate (1701) of the brake (17); when the piston rod of the cylinder assembly (14) extends, the unlocking plate (1701) is triggered, and the brake (17) shields a signal of the door controller (8) to unlock.

2. The swing door driving mechanism with locking and holding function according to claim 1, characterized in that: The gear assembly (11) has a driving pin (1104) symmetrically arranged at the center of the main body, and the driving pin (1104) is connected to the connecting rod assembly (6).

3. The swing door driving mechanism with locking and holding function according to claim 2, characterized in that: The dead point reference line is taken as the center line of the connecting rod assembly (6) passing through the rotation center of the gear assembly (11). When the door leaf is closed, the angle between the line connecting the center of the driving pin (1104) and the rotation center of the gear assembly (11) and the dead point reference line is 3° to 30°.

4. The swing door driving mechanism with locking and holding function according to claim 1, characterized in that: The driving assembly also includes an upper mounting plate (9), the motor (15) is fixedly connected to the upper portion of the upper mounting plate (9), the gear assembly (11) is arranged below the upper mounting plate (9), and is rotationally connected to the upper mounting plate (9) via a main shaft (1101), the gear assembly (11) body is provided with a limiting notch (1102), and the upper mounting plate (9) is provided with a limiting pin (10) extending into the notch (1102).

5. The swing door driving mechanism with locking and holding function according to claim 4, characterized in that: The upper surface of the gear assembly (11) is provided with a sensing pin (1103), and the upper mounting plate (9) is provided with a switch assembly (13) that cooperates with the sensing pin (1103) to detect the closed state of the door leaf.

6. The swing door driving mechanism with locking and holding function according to claim 1, characterized in that: The cylinder assembly (14) comprises a cylinder (1401), wherein the cylinder (1401) has a rod cavity provided with a joint, and an unlocking spring (1402) is sleeved on the piston rod.

7. The swing door driving mechanism with locking and holding function according to claim 1, characterized in that: The motor (15) is a reduction motor, and a Hall sensor is provided inside the motor (15).

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