Dual-drive mechanism of electric swing door

Abstract

The utility model discloses an electric swing door dual-drive mechanism which comprises a drive assembly, the output end of the drive assembly drives a vehicle door to be opened and closed through a transmission connecting rod assembly, the electric swing door dual-drive mechanism is characterized in that the drive assembly comprises a mounting plate, motors are symmetrically arranged on the mounting plate, and the output ends of the motors are meshed with gears to achieve power transmission; the two ends of the connecting rod assembly are connected with the driving shaft and the pin shaft respectively, and the connecting line formed when the centers of the driving shaft, the pin shaft and the main shaft are collinear is a dead point reference line; and when the automobile door is completely closed or opened, an included angle of 3-30 degrees is formed between the center connecting line of the limiting shaft and the main shaft and the dead point reference line. The two sets of driving mechanisms are adopted to drive the vehicle door, opening and closing of the vehicle door are achieved, and compared with the mode that a single driving mechanism drives two doors to be opened and closed, the installation and debugging difficulty is lower. The variable reduction ratio is realized by using the connecting rod structure, so that the starting torque of the motor is reduced, the working efficiency is high, the service life is long, and the reliability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic doors, in particular to a double-driving mechanism for an electric swing door. Background Art

[0002] At present, in the field of passenger doors for buses, inward swing doors are widely used due to their simple structure and low cost. According to the number of driving sources, electric double-opening inward swing doors can be divided into single-drive and double-drive types. Single-drive double-opening inward swing door products mostly use a connecting rod structure to realize the opening and closing movement of the left and right door leaves, but this structure also makes the left and right door leaves move synchronously and interrelated, resulting in difficulties in installation and debugging. For example, the two electric double inward swing door drive mechanisms disclosed in the utility model patents with patent numbers CN210067792U and CN213359737U both add additional motion compensation devices to the right connecting rod assembly to achieve the differential movement of the left and right door leaves, but due to the installation of such compensation devices, the external force acting on the right door leaf can be transmitted to the compensation device and drive it to move, resulting in obvious looseness of the right door leaf. The dual-motor double-opening inner swing door products in the prior art can solve the door leaf differential problem very well. For example, the two electric inner swing door drive devices disclosed in the utility model patents CN207583164U and CN216866383U both use motors directly connected to the door shaft. The double-opening door system can adopt a symmetrically arranged drive scheme to achieve independent control and sequential opening and closing of the door leaves. However, for this type of fixed reduction ratio drive mechanism, an excessive reduction ratio will make the size of the components too large, thereby occupying too much space on both sides of the mechanism, while an excessively small reduction ratio will increase the torque borne by the locking bearing device under vibration conditions, thereby reducing the service life and stability of the self-locking motor. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide an electric swing door dual drive mechanism with simple structure and low energy consumption.

[0004] Technical solution: The electric swing door dual-drive mechanism described in the utility model includes a drive assembly, and the output end of the drive assembly drives the opening and closing of the door through a transmission connecting rod assembly. It is characterized in that the drive assembly includes a mounting plate, and the motor is symmetrically arranged on the mounting plate, and the output end of the motor is engaged with the gear to realize the transmission of power; the two ends of the connecting rod assembly are respectively connected to the drive shaft and the pin shaft, and the connecting line when the centers of the drive shaft, the pin shaft and the main shaft are collinear is the dead point reference line; a limit shaft is provided on the gear, and when the door is fully closed or opened, the center connection line of the limit shaft and the main shaft has an angle of 3° to 30° with the dead point reference line.

[0005] Among them, the mounting plate symmetrically mounts the left motor and the right motor through the left motor mounting frame and the right motor mounting frame; the left motor mounting frame is rotatably set on the mounting plate through a rotating shaft, and a limit pin is provided on the mounting plate for limiting the rotation range of the left motor mounting frame, and the limit pin cooperates with the slot hole of the left motor mounting frame to limit its rotation range; it also includes a cylinder assembly fixed to the upper mounting plate through a fixed shaft, and the output end of the cylinder assembly is connected to the left motor mounting frame.

[0006] Wherein, the cylinder assembly is provided with an unlocking spring.

[0007] Wherein, the mounting plate is also provided with a left switch assembly for detecting the rotation position of the left motor.

[0008] Among them, the other end of the connecting rod assembly is connected to the rocker arm through a pin shaft, and the other end of the rocker arm is transmission-connected to the column.

[0009] Wherein, the motor is a reduction motor, and a Hall sensor is arranged inside the motor.

[0010] Wherein, the gear is rotatably arranged on the mounting plate through the main shaft.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0012] (1) The utility model uses two sets of driving mechanisms to drive the vehicle doors to open and close the vehicle doors. Compared with a single driving mechanism driving the opening and closing of two doors, the installation and debugging difficulty is lower.

[0013] (2) The utility model drives the connecting rod assembly through the gear to drive the vehicle door. The motor realizes a variable reduction ratio during the driving process. The value first decreases and then increases with the door opening movement. The deceleration ratio is relatively large in the closed and open positions, while the middle section is kept at a smaller value, thereby reducing the impact of the door opening or closing starting torque and the vehicle running vibration on the self-locking motor, improving the motor stress condition, and having high working efficiency, long service life and high reliability.

[0014] (3) The utility model provides a cylinder assembly to drive the motor to rotate, and the unlocking spring is used to realize the driven unlocking, which can effectively avoid the influence of the motor self-locking on the unlocking force, reduce the size of the emergency unlocking force, and has a simple unlocking structure and easy operation, thus meeting the emergency unlocking needs of the occupants. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the driving mechanism of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the drive assembly of the utility model;

[0017] Figure 3It is a structural schematic diagram of the mounting seat of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the left motor mounting bracket of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the cylinder assembly of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the gear of the utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the left motor of the utility model;

[0022] Figure 8 This is a schematic diagram of the dead point reference line, near dead point and angle of the utility model;

[0023] Fig. 9 This is a schematic diagram of a large reduction ratio of the drive assembly of the utility model (near dead point position);

[0024] Fig.10 It is a curve diagram of the change of the speed reduction ratio when the door of the utility model moves;

[0025] Fig.11 This is a curve diagram of the change of the required torque of the pillar when the utility model drives the door to move;

[0026] Fig.12 This is a schematic diagram of the drive mechanism of the utility model (free state);

[0027] Fig.13 This is a schematic diagram of the drive mechanism of the utility model (door closed and locked state);

[0028] Fig.14 This is a schematic diagram of the drive mechanism of the utility model (door open and locked state);

[0029] Fig.15 It is a schematic diagram of the drive mechanism of the utility model (locked state);

[0030] Fig.16 It is a schematic diagram of the driving mechanism of the utility model (unlocked state). DETAILED DESCRIPTION

[0031] like Figures 1 to 16As shown, the utility model mainly includes a frame 1, a left mounting frame 2, a right mounting frame 3, a swing rod 4, a middle drive assembly 5, a connecting rod assembly 6, a column 7 and a pin 8. Among them, the middle drive assembly 5 includes an upper mounting plate 51, a left motor mounting frame 52, a right motor mounting frame 53, a left motor 54, a right motor 55, a cylinder assembly 56, a left switch assembly 57, a right switch assembly 58, and a gear assembly 59. The frame 1 is fixedly connected to the vehicle body through the left and right mounting frames 2 and 3, the middle drive assembly 5 is fixedly mounted on the frame 1, the swing rod 4 is fixedly connected to the column 7, and the middle drive 5 is connected to the swing rod 4 through the connecting rod assembly 6 to transmit the driving force. The middle drive assembly 5 is a left-right symmetrical structure, and the connection relationship between the left and right components is the same. The connection relationship is described below by taking the left assembly as an example. The gear assembly 59 is respectively connected to the upper mounting plate 51 and the frame 1 through the main shaft 5903. The left motor mounting frame 52 is fixed on the upper mounting plate 51 and can rotate around the axis of the rotating shaft 5101. When the left motor mounting frame 52 rotates and swings, the range of motion is limited by the limited position pin 5102 and the slot 5201. The left motor 54 is mounted on the left motor mounting frame 52 and can swing synchronously with it. The cylinder assembly 56 is fixed to the upper mounting plate 51 through the fixed shaft 5103, and the front end of the cylinder assembly 56 is connected to the left motor mounting frame 52. When the air is turned on and off, the cylinder assembly 56 can rotate around the fixed shaft 5103 and can push the left motor mounting frame 52 to swing, thereby realizing the engagement and disengagement of the left motor gear 5401 and the gear assembly 59. When the air is ventilated, the cylinder assembly 56 retracts and pulls the left motor mounting frame 52 to rotate counterclockwise. When the swing limit pin 5102 contacts the left side of the slot 5201, the movement stops. At this time, the left motor gear 5401 is engaged with the gear assembly 59, and the unlocking compression spring 5601 is compressed to store energy. When the air is cut off, the unlocking compression spring 5601 is reset, the cylinder assembly 56 extends, and pushes the left motor mounting frame 52 to rotate clockwise. When the swing limit pin 5102 contacts the right side of the slot 5201 and limits, the movement stops, and the left motor gear 5401 is separated from the gear assembly 59. It should be further explained that in this embodiment, the connecting rod assembly 6 is a two-force rod structure, and its axial force is along the connecting rod axis direction. When the middle gear is used as a power source to drive the column to rotate, the reduction ratio is the ratio of the force arm from the center to the connecting rod axis, and when the column generates an active rotation trend, the reduction ratio is the inverse ratio of the force arm. In the fully closed and open positions of the door, the connecting rod axis and the center of the middle gear are close to collinear. At this time, the force arm at the middle driving gear is much smaller than the force arm at the column, thereby obtaining a larger reduction ratio, thereby amplifying the motor drive torque. On the contrary, when the column generates a door opening tendency torque in the closed position, a smaller reduction ratio can be obtained, thereby reducing the locking bearing capacity at the gear.

[0032] As the door opens, the reduction ratio first decreases and then increases. The reduction ratios at fully closed and fully open positions are relatively large, while the middle section remains at a smaller value. The reduction ratio variation curve is basically consistent with the torque curve required for column door opening and closing, thereby avoiding high torque in the door opening and closing startup section, thereby reducing motor power and door system power consumption.

[0033] In the fully closed state, when the column generates a door-opening torque, the driving force will force the self-locking motor gear to rotate in the opposite direction, and the larger reduction ratio can reduce the locking bearing capacity at the gear, that is, reduce the impact of the door-opening torque on the self-locking motor, improve the motor's force condition, and increase its service life and locking stability.

[0034] Workflow:

[0035] Take the middle-driven left-side component as an example for door opening: the cylinder assembly 56 is ventilated and retracted, pulling the left motor mounting bracket 52 to rotate around the rotating shaft 5101 until the swing limit pin 5102 contacts the left side of the slot 5201 and stops. At this time, the motor gear 5401 and the gear assembly 59 are engaged; when the cylinder assembly 56 is ventilated and retracted, the unlocked compression spring 5601 is compressed to store energy; the left motor 54 executes the door opening command, and the motor gear 5401 drives the gear assembly 59 to rotate, and then transmits the driving force to the rocker arm 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.

[0036] Taking the middle drive left component as an example for closing the door: the left motor 54 executes the door closing command and drives the gear assembly 59 to rotate in the opposite direction; the driving force is transmitted to the rocker arm 4 through the connecting rod assembly 6, so that it drives the column 7 to rotate around its own axis to realize the door closing movement; when the limit shaft 5902 approaches the closed stop position, the left switch assembly 57 is triggered first, and then after contacting the limit part, the motor stops rotating and completes locking.

[0037] The locking and closing of the door with a large reduction ratio takes the left side component of the middle drive as an example: the left motor 54 is a reduction motor, and the self-locking characteristics of the motor reducer can be used to achieve full locking. The connecting rod assembly 6 is connected to the gear assembly 59 through the drive shaft 5901, and the connecting rod assembly 6 is connected to the rocker 4 through the pin 8. The center line of the drive shaft 5901 and the pin 8 is the axis of the connecting rod assembly. When the center of the main shaft 5903 coincides with the axis of the connecting rod assembly, the drive shaft 5901 is at the dead point position, and the axis of the connecting rod assembly is the dead point reference line. When the center of the main shaft 5903 is below the axis of the connecting rod assembly, it is not past the "dead point". A left switch assembly 57 and a limit part are set in the closed position, and the left switch assembly 57 is used to identify the closed position. The limit part is used to limit the final stopping position of the limit shaft 5902 on the gear assembly 59, so that it does not pass the dead point but is close to the dead point. In this way, the lever arm of the connecting rod assembly on the gear assembly 59 side can be small, while the lever arm at the rocker arm 4 can be large. Generally, the ratio can be more than 8 times, thereby realizing a large reduction ratio in the closed position.

[0038] Emergency unlocking and closing state, taking the left side component of the middle drive as an example:

[0039] When the air is cut off, the unlocking compression spring 5601 releases energy, and the cylinder assembly 56 extends, pushing the left motor mounting bracket 52 to rotate around the rotating shaft 5101; when the left motor mounting bracket 52 rotates, the motor gear 5401 and the gear assembly 59 begin to disengage, and stop after the swing limit pin 5102 contacts the right side of the slot 5201, realizing emergency unlocking of the door, and the door can be opened manually afterwards.

[0040] Take the left side component of the middle drive as an example for intelligent anti-pinch:

[0041] The upper mounting plate 51 is provided with a left switch assembly 57. When the door is close to the fully closed state, the limit shaft 5902 on the gear assembly 59 will trigger the switch assembly 57. The left motor 54 is a reduction motor with a Hall sensor inside. The Hall sensor can detect the number of motor rotations and the speed, and transmit it to the door controller in real time, so as to determine the movement position and state of the door leaf. If an obstacle is encountered when opening or closing the door, the current and speed of the left motor 54 will change. 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. An electric swing door dual drive mechanism, comprising a drive assembly (5), wherein the output end of the drive assembly (5) drives the door to open and close through a transmission connecting rod assembly (6), characterized in that: The driving assembly (5) comprises a mounting plate (51), on which a motor is symmetrically arranged, and the output end of the motor meshes with a gear (59) to realize power transmission; the two ends of the connecting rod assembly (6) are respectively connected to a driving shaft (5901) and a pin shaft (8), and the connecting line when the centers of the driving shaft (5901), the pin shaft (8) and the main shaft (5903) are collinear is the dead point reference line; the gear (59) is provided with a limit shaft (5902), and when the door is completely closed or opened, the center connecting line of the limit shaft (5902) and the main shaft (5903) is at an angle of 3° to 30° with the dead point reference line.

2. The electric swing door dual drive mechanism according to claim 1, characterized in that: The mounting plate (51) is symmetrically mounted with a left motor (54) and a right motor (55) via a left motor mounting frame (52) and a right motor mounting frame (53); the left motor mounting frame (52) is rotatably mounted on the mounting plate (51) via a rotating shaft (5101); a limit pin (5102) for limiting the rotation range of the left motor mounting frame (52) is provided on the mounting plate (51); the limit pin (5102) cooperates with a slot (5201) of the left motor mounting frame (52) to limit the rotation range; and the mounting plate (51) also includes a cylinder assembly (56) fixed to the upper mounting plate (51) via a fixed shaft (5103); an output end of the cylinder assembly (56) is connected to the left motor mounting frame (52).

3. The electric swing door dual drive mechanism according to claim 2, characterized in that: The cylinder assembly (56) is provided with an unlocking spring (5601).

4. The electric swing door dual drive mechanism according to claim 1, characterized in that: The mounting plate (51) is also provided with a left switch assembly (57) for detecting the rotation position of the left motor (54).

5. The electric swing door dual drive mechanism according to claim 1, characterized in that: The other end of the connecting rod assembly (6) is connected to the swing rod (4) via a pin shaft (8), and the other end of the swing rod (4) is drivingly connected to the column (7).

6. The electric swing door dual drive mechanism according to claim 1, characterized in that: The motor is a reduction motor, and a Hall sensor is arranged inside the motor.

7. The electric swing door dual drive mechanism according to claim 1, characterized in that: The gear (59) is rotatably mounted on the mounting plate (51) via a main shaft (5903).

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