Electric side door opening actuator

Abstract

The utility model discloses an electric side door opening actuator which comprises an actuator shell, a driving motor arranged on the actuator shell, a gear set, a lead screw and a vehicle door connecting support, the driving motor drives the lead screw to rotate through the gear set, the lead screw is connected with the vehicle door connecting support, and the vehicle door connecting support is fixedly connected with a vehicle door; a driving plate is arranged at the front end of the driving motor, a brushless motor driving circuit is arranged on the driving plate, and the brushless motor driving circuit is electrically connected with the driving motor to output electric power, so that the driving motor operates forwards / backwards to drive the lead screw to open, close or limit and suspend the vehicle door. The electric side door opening actuator can electrically open and close a vehicle door, and the vehicle door can be limited and suspended at any angle when being opened; and meanwhile, the functions of manual opening and closing are considered.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an electric side-opening door actuator. Background Technology

[0002] Cars are a common means of transportation in people's daily lives. In recent years, with the vigorous development of new energy vehicles, the level of intelligence of cars has also become higher and higher.

[0003] When using a car, the first thing people do is open / close the car door; however, currently traditional car doors are side doors

[0004] The opening method is mostly manual, which does not meet the needs of intelligent and user-friendly automotive development.

[0005] Currently available automatic car door opening devices can only open and close the door by pushing a lever; if you want the door to remain open, you need to open it manually. Utility Model Content

[0006] The purpose of this utility model is to provide an electric side-opening door actuator that can replace the traditional limit switch, realize the electric opening and closing of the car door, and limit the door to hover at any angle when it is open, while also taking into account the manual opening and closing functions.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an electric side-opening door actuator, including an actuator housing, a drive motor, a gear set, a lead screw, and a door connecting bracket mounted on the actuator housing. The drive motor drives the lead screw to rotate through the gear set. The lead screw is connected to the door connecting bracket, and the door connecting bracket is connected to and fixed to the door. A drive plate is provided at the front end of the drive motor. A brushless motor drive circuit is provided on the drive plate. The brushless motor drive circuit is electrically connected to the drive motor to output power, causing the drive motor to rotate forward / reverse, thereby driving the lead screw to open, close, or limit and stop the door.

[0008] A further feature of this invention is that the gear set includes a drive gear, a first transmission gear, and a second transmission gear located at the front end of a drive motor. The drive gear meshes with the first transmission gear, and the first transmission gear meshes with the second transmission gear.

[0009] A further feature of this invention is that it includes a slider and a push rod, the lead screw is provided with a bearing, the slider is sleeved on the lead screw, and the push rod is connected to the slider.

[0010] A further feature of this invention is that: the upper end of the slider is provided with a threaded hole, the lead screw passes through the threaded hole, the lower end of the slider is provided with a mounting groove, the mounting groove has mounting holes running through it from top to bottom, the bottom of the push rod is inserted into the mounting groove, and the push rod and the slider are connected and fixed by bolts from the mounting holes.

[0011] A further feature of this invention is that shock-absorbing pads are provided at both ends of the shaft of the drive motor.

[0012] A further feature of this invention is that the driving gear, the first transmission gear, and the second transmission gear are all helical gears.

[0013] A further feature of this invention is that it includes a rotating block, the second transmission gear is sleeved on the rotating block, a spherical nut is provided inside the rotating block, and a lead screw is arranged inside the spherical nut for helical transmission.

[0014] A further feature of this invention is that the brushless motor drive circuit includes a drive chip, a three-phase inverter bridge circuit, and a sampling circuit. The drive chip is connected to both the three-phase inverter bridge circuit and the sampling circuit. The three-phase inverter bridge circuit includes an upper bridge arm and a lower bridge arm composed of six MOS transistors. The output pins of the drive chip are connected to the gates of the MOS transistors.

[0015] A further feature of this invention is that the sampling circuit includes sampling resistors Res3, Res2, and Res1, and the driving chip is connected to the two ends of sampling resistors Res3, Res2, and Res1 respectively.

[0016] A further feature of this invention is that it also includes a sampling resistor Res4, the two ends of which are connected to a sampling chip, and the sampling chip is connected to a driver chip.

[0017] Compared with the prior art, the electric side-opening door actuator of this utility model can electrically open and close the car door, and realize the door opening angle limit and hovering; at the same time, it also has manual opening and closing functions. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the electric side-opening door actuator in Example 1.

[0019] Figure 2 This is a cross-sectional view of the electric side-opening door actuator in Embodiment 1.

[0020] Figure 3 This is an internal assembly diagram of the electric side-opening door actuator in Example 1.

[0021] Figure 4 This is an assembly diagram of the slider, lead screw, and push rod in Example 1.

[0022] Figure 5 This is a block diagram of the brushless motor drive circuit in Example 2.

[0023] Figure 6 This is the schematic diagram of the brushless motor drive circuit in Example 2.

[0024] Figure 7 This is the schematic diagram of the Hall effect conversion circuit in Example 2.

[0025] Figure 8 This is a cross-sectional view of the electric side-opening door actuator in Embodiment 3.

[0026] Figure 9 This is an internal assembly diagram of the electric side-opening door actuator in Example 3.

[0027] Figure 10 This is the lead screw assembly diagram for Example 3.

[0028] In the diagram: 1. Actuator housing; 2. Drive motor; 3. Gear set; 4. Lead screw; 5. Drive plate; 6. Door connecting bracket; 21. Shock-absorbing pad; 31. Drive gear; 32. First transmission gear; 33. Second transmission gear; 41. Slider; 42. Push rod; 43. Bearing; 44. Threaded hole; 45. Mounting slot; 46. Mounting hole; 47. Rotating block; 48. Ball nut; 51. Brushless motor drive circuit; 52. Drive chip; 53. Three-phase inverter bridge circuit; 54. Sampling circuit. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. It should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Example 1

[0031] like Figure 1 , Figure 2As shown, this embodiment discloses an electric side-opening door actuator, including an actuator housing 1, a drive motor 2, a gear set 3, a lead screw 4, and a door connecting bracket 6 mounted on the actuator housing 1; the front end of the door connecting bracket 6 is connected and fixed to the door for pushing or pulling the door, as shown. Figure 3 As shown, the gear set 3 includes a drive gear 31, a first transmission gear 32, and a second transmission gear 33 located at the front end of the drive motor 2. The drive gear 31 meshes with the first transmission gear 32 for transmission, and the first transmission gear 32 meshes with the second transmission gear 33 for transmission. The second transmission gear 33 is sleeved on the lead screw 4, and the lead screw 4 is connected to the door connecting bracket 6. The second transmission gear 33 drives the lead screw 4 to rotate, thereby driving the door connecting bracket 6.

[0032] like Figures 2-4 As shown, the lead screw 4 is equipped with a bearing 43, which causes the lead screw 4 to rotate due to the second transmission gear 33; as Figures 2-4 As shown, a slider 41 is sleeved on the lead screw 4, the end of the push rod 42 is connected to the slider 41, and the front end of the push rod 42 is connected to the door connecting bracket 6; the drive motor 2 drives the first transmission gear 32 and the second transmission gear 33 to drive the lead screw 4 to rotate, and the slider 41 is slid by the rotation of the lead screw 4, thereby causing the push rod 42 to move and drive the door connecting bracket 6.

[0033] like Figure 2 , 4 As shown, the upper end of the slider 41 is provided with a threaded hole 44, and the lead screw 4 passes through the threaded hole 44. The lead screw 4 and the slider 41 are screwed together, which drives the slider 41 to move back and forth. The lower end of the slider 41 is provided with a mounting groove 45, and the mounting groove 45 has mounting holes 46 running through it from top to bottom. The bottom of the push rod 42 is inserted into the mounting groove 45, and the bolt is inserted from the mounting hole 46 to connect and fix the push rod 42 and the slider 41.

[0034] like Figure 3 As shown, the drive gear 31, the first transmission gear 32, and the second transmission gear 33 are all helical gears, which makes the actuator's force transmission less impactful, smoother, and quieter.

[0035] like Figure 2 , 3 As shown, the drive motor 2 has shock-absorbing pads 21 at both ends of its shaft. The shock-absorbing pads 21 reduce / eliminate the axial force of the motor, prevent the gears from moving left and right due to the axial force of the motor and the resulting abnormal noise, and make the actuator run more smoothly and with lower noise.

[0036] Example 2

[0037] like Figure 3As shown, the front end of the drive motor 2 is provided with a drive board 5. In this embodiment, the drive motor 2 is a brushless motor, which is a motor that does not require carbon brushes. The rotation of the motor is controlled by electronic commutation and digital control is used to make the speed and torque more precise. The drive board 5 is provided with a brushless motor drive circuit 51. The brushless motor drive circuit 51 is electrically connected to the drive motor 2 to output power to make the drive motor 2 run in forward / reverse direction and precisely control the number of rotations of the drive motor 2, so that the car door can be opened and closed electrically, and the door can be stopped at any angle when it is open.

[0038] like Figure 5 As shown, the brushless motor drive circuit 51 includes a drive chip 52, a three-phase inverter bridge circuit 53, and a sampling circuit 54. The drive chip 52 is connected to both the three-phase inverter bridge circuit 53 and the sampling circuit 54. The output terminal of the three-phase inverter bridge circuit 53 is connected to the brushless motor for outputting drive power. Figure 6 As shown, the three-phase inverter bridge circuit 53 consists of six MOSFETs forming the upper and lower bridge arms, which invert DC power into AC power and output it to the brushless motor. The output pins of the driver chip 52 are connected to the gates of the MOSFETs, and output high levels PHA_GHA, PHB_GHB, PHC_GHC or low levels PHA_GLA, PHB_GLB, PHC_GLC to control the MOSFETs to conduct, converting the DC input voltage into a controllable three-phase AC output voltage, so that the motor rotates in the forward or reverse direction.

[0039] Each MOSFET in the three-phase inverter bridge circuit 53 is connected in parallel with a first resistor and a first capacitor, which are connected in series to smooth the current in the brushless motor drive circuit 51, resulting in smooth actuator operation. Figure 6 As shown, the MOSFET is connected in parallel with a first resistor R184 and a first capacitor C123, and the first resistor R184 and the first capacitor C123 are connected in series. The other MOSFETs are configured in the same way.

[0040] like Figure 6 As shown, sampling circuit 54 is connected to the lower arm of three-phase inverter bridge circuit 53. It collects the current of each arm through sampling resistors Res3, Res2, and Res1. The two ends of sampling resistors Res3, Res2, and Res1 are connected to driver chip 52. The voltage values ​​on both sides of sampling resistors Res3, Res2, and Res1 are sent to driver chip 52. Driver chip 52 calculates the current of each arm and completes the current sampling of each arm. Sampling resistor Res4 is connected to the grounding point of the lower arm of three-phase inverter bridge circuit 53. The two ends of sampling resistor Res4 are connected to sampling chip. Sampling resistor Res4 samples the bus signal of three-phase inverter bridge circuit 53. Sampling chip is electrically connected to driver chip 52 and amplifies the bus signal and sends it to driver chip 52.

[0041] like Figure 1 ,7 As shown, a Hall sensor is installed inside the drive motor 2. The Hall sensor locates the rotor position, and the Hall conversion circuit converts the signal into a digital signal for output, enabling the system to accurately locate the rotation angle of the drive motor 2.

[0042] The brushless motor drive circuit 51 can accurately control the speed, angle, torque, etc. of the drive motor 2, and accurately control the actuator stroke through the gear set and lead screw, so that the actuator drives the door to open and stops at any angle.

[0043] Example 3

[0044] like Figure 8 As shown, another embodiment discloses an electric side-opening door actuator, including an actuator housing 1, a drive motor 2 mounted on the actuator housing 1, a gear set 3, a lead screw 4, and a door connecting bracket 6; the gear set 3 includes a drive gear 31, a first transmission gear 32, and a second transmission gear 33 located at the front end of the drive motor 2. The drive gear 31 meshes with the first transmission gear 32 for transmission, and the first transmission gear 32 meshes with the second transmission gear 33 for transmission. The second transmission gear 33 is sleeved on the lead screw 4, and the lead screw 4 is connected to the door connecting bracket 6. The second transmission gear 33 drives the lead screw 4 to reciprocate left and right, thereby driving the door connecting bracket 6.

[0045] like Figure 9 As shown, the second transmission gear 33 is sleeved on the rotating block 47, and a spherical nut 48 is provided inside the rotating block 47. The lead screw 4 is installed inside the spherical nut 48 for helical transmission.

[0046] like Figure 10 As shown, a sealing cover is provided at the front end of the lead screw 4.

[0047] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An electric side-opening door actuator, characterized in that: The device includes an actuator housing (1), a drive motor (2) mounted on the actuator housing (1), a gear set (3), a lead screw (4), and a door connecting bracket (6). The drive motor (2) drives the lead screw (4) to rotate through the gear set (3). The lead screw (4) is connected to the door connecting bracket (6), and the door connecting bracket (6) is connected to and fixed the door. The front end of the drive motor (2) is provided with a drive plate (5). The drive plate (5) is provided with a brushless motor drive circuit (51). The brushless motor drive circuit (51) is electrically connected to the drive motor (2) and outputs power to make the drive motor (2) rotate forward / reverse to drive the lead screw (4) to open, close, or limit and stop the door.

2. The electric side-opening door actuator according to claim 1, characterized in that: The gear set (3) includes a drive gear (31), a first transmission gear (32) and a second transmission gear (33) provided at the front end of the drive motor (2). The drive gear (31) meshes with the first transmission gear (32) for transmission, and the first transmission gear (32) meshes with the second transmission gear (33) for transmission.

3. The electric side-opening door actuator according to claim 2, characterized in that: It also includes a slider (41) and a push rod (42), the lead screw (4) is provided with a bearing (43), the slider (41) is sleeved on the lead screw (4), and the push rod (42) is connected to the slider (41).

4. The electric side-opening door actuator according to claim 3, characterized in that: The upper end of the slider (41) is provided with a threaded hole (44), the lead screw (4) passes through the threaded hole (44), the lower end of the slider (41) is provided with a mounting groove (45), the mounting groove (45) has mounting holes (46) running through it from top to bottom, the bottom of the push rod (42) is inserted into the mounting groove (45), and the push rod (42) and the slider (41) are connected and fixed by bolts from the mounting holes (46).

5. The electric side-opening door actuator according to claim 1, characterized in that: The drive motor (2) has shock-absorbing pads (21) at both ends of its shaft.

6. The electric side-opening door actuator according to claim 2, characterized in that: The drive gear (31), the first transmission gear (32), and the second transmission gear (33) are all helical gears.

7. An electric side-opening door actuator according to claim 2, characterized in that: It also includes a rotating block (47), the second transmission gear (33) is sleeved on the rotating block (47), a ball nut (48) is provided inside the rotating block (47), and the lead screw (4) is set inside the ball nut (48) for helical transmission.

8. An electric side-opening door actuator according to claim 1, characterized in that: The brushless motor drive circuit (51) includes a drive chip (52), a three-phase inverter bridge circuit (53), and a sampling circuit (54). The drive chip (52) is connected to the three-phase inverter bridge circuit (53) and the sampling circuit (54) respectively. The three-phase inverter bridge circuit (53) includes an upper bridge arm and a lower bridge arm composed of 6 MOS transistors. The output pins of the drive chip (52) are connected to the gates of the MOS transistors respectively.

9. An electric side-opening door actuator according to claim 8, characterized in that: The sampling circuit (54) includes sampling resistors Res3, Res2 and Res1, and the driving chip (52) is connected to the two ends of sampling resistors Res3, Res2 and Res1 respectively.

10. An electric side-opening door actuator according to claim 9, characterized in that: It also includes a sampling resistor Res4, which is connected to a sampling chip, and the sampling chip is connected to the driver chip (52).

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