Driving device based on automobile electric door opening and automobile

Abstract

The invention relates to the technical field of automobiles, in particular to a driving device based on electric door opening of an automobile and the automobile, and the driving device based on electric door opening of the automobile comprises a driving unit, a first driving gear and a second driving gear, the first driving gear is driven to rotate in a preset direction when the driving device is powered on; the transmission unit is connected with the driving unit and the moving unit; the transmission unit comprises a transmission connecting mechanism, and the transmission connecting mechanism is driven to work in a rotating state when the first driving gear works in the rotating state; the movement unit comprises a movement screw rod matched with the transmission connection mechanism, and the movement screw rod is driven to move when the transmission connection mechanism works in a rotating state; wherein the driving unit, the transmission unit and the movement unit are coaxially arranged.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to a driving device based on an automobile electric door opening and an automobile. Background Art

[0002] At present, some cars are provided with door opening devices, which automatically open or close the door of the car through the door opening device. Figure 1 As shown, the existing driving device generally includes a door connecting plate 10 fixedly mounted on the car door body, a motor 11, a first-stage double gear 12 connected to the motor gear 110 of the motor, a second-stage double gear 13, and an output gear 14, the output gear 14 is fixedly connected to a set of screws 16 equipped with a nut 15, and one end of a strut 17 is fixedly connected to the lower end of the nut 15, and the other end of the strut 17 is connected to a strut bracket 18. Its working principle is: during the rotation of the motor, the motor gear 110 drives the first-stage double gear 12, the second-stage double gear 13, and the output gear 14 to transmit, and the output gear 14 drives the screw 16 to rotate. At this time, the nut 15 is displaced along the thread on the screw 16 and drives the strut 17 to move, that is, the strut bracket is displaced to realize the opening or closing of the car door. The disadvantages of this technical solution are: 1. It uses a parallel gear transmission method to transmit driving force. Its motor gear and screw are parallel to each other, which has relatively poor stability and relatively low transmission efficiency after two-stage double gear transmission. 2. It requires high installation precision. The motor gear 110, the first-stage double gear 12, the second-stage double gear 13, and the output gear 14 are all located in the gear cavity formed by the bottom cover 19 and the upper cover 20. Since the four gears need to mesh with each other, that is, the gear cavity needs to be set with three center distances at the same time, its processing method, manufacturing precision, and tolerance requirements are high. For example, if the gear center distance is too small, the gear meshing is relatively difficult. If the gear center distance is too large, the tooth gap increases, which is prone to vibration. 3. The movement of the screw to push the nut is relatively noisy. 4. The structure is relatively complex and occupies a relatively large space, which is not conducive to miniaturization design. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a drive device based on an electric door opening of an automobile and an automobile, aiming to improve the stability and transmission efficiency of the motor driving force transmission, reduce the difficulty of processing the drive device, and reduce noise.

[0004] In one aspect, the present invention provides a driving device for opening an electric door of an automobile, comprising:

[0005] A driving unit, wherein a first driving gear is provided at the end of the driving device, and the first driving gear is driven to rotate in a predetermined direction when the driving device is powered on;

[0006] A transmission unit, connecting the driving unit and the motion unit; the transmission unit includes a transmission connection mechanism, which drives the transmission connection mechanism to rotate when the first driving gear rotates;

[0007] A motion unit, the motion unit comprising a motion screw matched with the transmission connection mechanism, which drives the motion screw to move when the transmission connection mechanism is in a rotating state;

[0008] The driving unit, the transmission unit and the motion unit are coaxially arranged.

[0009] Preferably, in the above-mentioned driving device based on electric door opening of a car, the driving unit includes:

[0010] a brushless stator, wherein the brushless stator forms a driving magnetic field when the driving unit is powered on;

[0011] A brushless rotor is built into the cavity of the brushless stator. One end of the brushless rotor is fixedly connected to the first driving gear for matching the transmission unit. Under the action of the driving magnetic field, the brushless rotor and the first driving gear are driven to rotate along the predetermined direction.

[0012] Preferably, in the above-mentioned driving device based on electric door opening of an automobile, the transmission unit includes:

[0013] a second transmission gear set, the second transmission gear set being meshed and connected with the first driving gear and the transmission fixed ring gear;

[0014] A transmission bracket, wherein the transmission bracket is provided with a transmission gear frame set matching the second transmission gear set and the transmission connection mechanism; wherein the transmission connection mechanism is provided with a thread matching the motion screw;

[0015] When the first driving gear is in a rotating state, the second transmission gear set moves along the transmission fixed gear ring with the first driving gear as the center and drives the transmission connection mechanism to be in a rotating state.

[0016] Preferably, the above-mentioned driving device based on the electric door opening of an automobile further includes a stopping device, which is sleeved on the transmission connection mechanism.

[0017] Preferably, the above-mentioned driving device based on electric door opening of an automobile further includes a first motor housing, which forms a cavity for accommodating the driving unit, the transmission unit and the motion unit, and the transmission fixed ring gear is fixedly connected to the end of the first motor housing.

[0018] Preferably, the above-mentioned driving device based on electric door opening of an automobile further includes a second motor housing, and the second motor housing accommodates the stopping device.

[0019] Preferably, in the above-mentioned driving device based on electric door opening of an automobile, one end of the motion screw is provided with a ball bearing for connecting to a driving crank, and the other end of the driving crank is connected to an actuator.

[0020] Preferably, the above-mentioned driving device based on electric door opening of an automobile further includes a limiting housing connected to the first motor housing, and the limiting housing is connected to the first motor housing and the second motor housing.

[0021] Preferably, in the above-mentioned driving device based on electric door opening of an automobile, a limit baffle is provided at the other end of the moving screw, and the diameter of the limit baffle matches the limit housing.

[0022] On the other hand, the present invention further provides an automobile, which includes a driving device based on electric door opening of an automobile as described above, wherein the moving screw of the driving device is connected to the vehicle door through a connecting device.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention adopts planetary gears to transmit driving force, and its first driving gear, moving screw and transmission connection mechanism are on the same axis, which ensures the stability of the moving screw during rotation and has relatively high transmission efficiency; secondly, the technical solution adopted by the present invention only needs to ensure that the first driving gear, moving screw and transmission connection mechanism are coaxial, and its installation difficulty is relatively low and the processing precision requirements are low; the movement of the moving screw is driven by a nut, and its noise is relatively small, the structure is relatively simple, and the space occupied is relatively small, which is conducive to miniaturized design. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a driving device in the prior art;

[0026] Figure 2 A schematic diagram of an exploded structure of a driving device for electric door opening of an automobile provided by an embodiment of the present invention;

[0027] Figure 3 A schematic structural diagram of a driving device for electric door opening of an automobile provided by an embodiment of the present invention;

[0028] Figure 4 A schematic structural diagram of a transmission unit in a driving device for electric door opening of an automobile provided by an embodiment of the present invention;

[0029] Figure 5 A cross-sectional view of a driving device for electric door opening of an automobile provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0031] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation, the shape, quantity and proportion of each component in actual implementation can be changed at will, and the component layout may also be more complicated.

[0032] Example 1

[0033] like Figure 2-5 As shown, the present invention provides a driving device based on an electric door opening of an automobile, which includes:

[0034] The driving unit 21 is provided with a first driving gear 210 at the end of the driving device, which drives the first driving gear 210 to rotate in a predetermined direction when the driving device is powered on; specifically, a driving magnetic field is formed when the driving device is powered on, and the driving magnetic field drives the first driving gear 210 to rotate in a predetermined direction. Schematically, the predetermined direction can be clockwise or counterclockwise. The rotation direction of the first driving gear 210 can be determined by the direction of the driving current, and the rotation direction of the first driving gear 210 can be changed by changing the direction of the driving current. In addition, the rotation speed of the first driving gear 210 can be adjusted by adjusting the magnitude of the driving current (which can also be understood as the power-on current) to change the strength of the driving magnetic field.

[0035] The transmission unit 22 connects the drive unit 21 and the motion unit; the transmission unit 22 includes a transmission connection mechanism 220, which drives the transmission connection mechanism 220 to work in a rotational state when the first drive gear 210 works in a rotational state; schematically, the rotation direction of the transmission connection mechanism 220 can be clockwise or counterclockwise, and its rotation direction can be determined by the direction of the driving magnetic field. It should be noted that the rotation direction of the transmission unit 22 can be the same direction as the rotation direction of the drive unit 21, or it can be opposite to the rotation direction of the drive unit 21 (that is, the rotation direction of the transmission unit 22 is opposite to the rotation direction of the drive unit 21). Those skilled in the art can realize this according to the existing technology, and no specific limitation is made here. The linkage between the drive unit 21 and the transmission unit 22 is intended to realize the transmission of driving force. This embodiment takes the same rotation direction of the transmission unit 22 and the drive unit 21 as an example.

[0036] The motion unit includes a motion screw 23 that matches the transmission connection mechanism 220, and drives the motion screw 23 to move when the transmission connection mechanism 220 is in a rotating state; schematically, the transmission unit 22 rotates in a clockwise direction under the action of the driving magnetic field, and during the clockwise rotation, the distal end of the motion screw 23 moves toward the direction close to the driving unit 21; the transmission unit 22 rotates in a counterclockwise direction under the action of the driving magnetic field, and during the counterclockwise rotation, drives the distal end of the motion screw 23 to move toward the direction away from the driving unit 21. In actual application, the transmission unit 22 can also be controlled to drive the distal end of the motion screw 23 to move in the direction away from the driving unit 21 during the clockwise rotation, and drive the distal end of the motion screw 23 to move in the direction close to the driving unit 21 during the counterclockwise rotation. The movement direction of the motion screw 23 is determined according to actual conditions and is not specifically limited here.

[0037] The driving unit 21 , the transmission unit 22 , and the motion unit are coaxially arranged, that is, the central axis of the driving unit 21 , the central axis of the transmission unit 22 , and the central axis of the motion unit are on the same horizontal line.

[0038] The aforementioned drive device for an electric vehicle door opening, taking the example of a drive device that rotates clockwise to drive the distal end of the motion screw 23 away from the drive unit 21 or the transmission unit 22, operates as follows: When the drive device is powered on and generating a driving current, the drive unit 21, under the stimulation of the electrical energy, generates a driving magnetic field that causes the first drive gear 210 to rotate clockwise. This driving magnetic field acts on the first drive gear 210, causing the first drive gear 210 to rotate under the influence of the driving magnetic field. This rotation drives the transmission connection of the transmission unit 22, which in turn drives the distal end of the motion screw 23 away from the drive unit 21 or the transmission unit 22. By changing the direction of the driving current, the transmission unit 22 can control the motion screw 23 to move toward the drive unit 21 or the transmission unit 22. Because the motion screw 23, the transmission unit 22, and the drive unit 21 are coaxially arranged, the stability of the motion screw 23 during rotation is ensured, while also reducing energy loss during rotation, further reducing production costs. Moreover, the structure is relatively simple and the assembly process is less difficult.

[0039] As a further preferred embodiment, the above-mentioned driving device based on electric door opening of an automobile, wherein the driving unit 21 includes:

[0040] A brushless stator 222, which forms a driving magnetic field when the driving unit 21 is powered on;

[0041] The brushless rotor 221 is internally mounted within the cavity of the brushless stator 222. One end of the brushless rotor 221 is fixedly connected to the first drive gear 210 of the transmission unit 22. The driving magnetic field drives the brushless rotor 221 and the first drive gear 210 to rotate in the predetermined direction. The first drive gear 210 and the brushless rotor 221 have interconnecting cavities to accommodate the motion screw 23, which reciprocates within the cavity.

[0042] As a further preferred embodiment, the above-mentioned driving device based on electric door opening of an automobile, wherein the transmission unit 22 includes:

[0043] A second transmission gear set, the second transmission gear set is meshed and connected with the first driving gear 210 and the transmission fixed gear ring 223; further, the second transmission gear set may include two second transmission gears, or three second transmission gears, or four second transmission gears. Schematically, when the second transmission gear set is formed by three second transmission gears, the three second transmission gears are respectively a second transmission first gear 2211, a second transmission second gear 2212, and a second transmission third gear 2213;

[0044] The transmission bracket is provided with a transmission gear frame assembly matching the second transmission gear set and the transmission connection mechanism 220; wherein the transmission gear frame assembly is arranged toward the drive unit 21; schematically, when the second transmission gear set includes three second transmission gears, the transmission gear frame assembly also includes three transmission gear frames, namely a first transmission gear frame 2221 matching the second transmission first gear 2211, a second transmission gear frame 2222 matching the second transmission second gear 2212, and a third transmission gear frame matching the second transmission third gear 2213. The second transmission first gear 2211 is rigidly connected to the first transmission gear frame 2221, and similarly, the second transmission second gear 2212 is rigidly connected to the second transmission gear frame 2222, and the second transmission third gear 2213 is rigidly connected to the third transmission gear frame. The second transmission first gear 2211, the second transmission second gear 2212, and the second transmission third gear 2213 are all meshedly connected to the first drive gear 210 and the transmission fixed ring gear 223. When the first driving gear 210 is in a rotating state, the second transmission gear set moves along the transmission fixed gear ring 223 with the first driving gear 210 as the center and drives the transmission connection mechanism 220 to rotate.

[0045] Furthermore, the transmission connection mechanism 220 is provided with a thread matching the motion screw 23. Alternatively, the transmission connection mechanism 220 includes a groove in which a nut matching the motion screw 23 is fixedly disposed. In actual use, the setting is based on specific circumstances and is not specifically limited here.

[0046] Schematically, the second transmission first gear 2211, the second transmission second gear 2212, and the second transmission third gear 2213 can form a planetary gear structure in combination with the first drive gear 210. Schematically, the first drive gear 210 is used as the sun gear, the second transmission first gear 2211 forms the first planetary gear, the second transmission second gear 2212 forms the second planetary gear, and the second transmission third gear 2213 forms the third planetary gear. The first planetary gear, the second planetary gear, and the third planetary gear are meshed with the sun gear and rotate in the transmission fixed gear ring 223, and the first planetary gear, the second planetary gear, and the third planetary gear rotate around the sun gear.

[0047] The operating principle of the transmission unit 22 is as follows: when the sun gear (i.e., the first drive gear 210) is rotating, the sun gear drives the first, second, and third planetary gears to rotate about the sun gear due to the positional limitation of the transmission fixed ring gear 223. Since the second transmission first gear 2211 is rigidly connected to the first transmission gear frame 2221, the second transmission second gear 2212 is rigidly connected to the second transmission gear frame 2222, and the second transmission third gear 2213 is rigidly connected to the third transmission gear frame, the first planetary gear drives the first transmission gear frame, the second planetary gear drives the second transmission gear frame, and the third planetary gear drives the third transmission gear frame to rotate. The transmission frame rotates about the sun gear axis, and the transmission connection mechanism 220 also rotates accordingly. During the rotation of the transmission connection mechanism 220, the driving screw 23 is displaced.

[0048] It should be noted that since the rotation speed of the first drive gear 210 is relatively fast, if this speed directly acts on the moving screw 23, the displacement speed of the moving screw 23 is relatively high. For this reason, this application uses the first planetary gear, the second planetary gear, and the third planetary gear for speed reduction processing to make the moving screw 23 match the target speed, where the target speed can be set according to actual conditions and is not limited here.

[0049] As a further preferred embodiment, the aforementioned drive device for an electric automobile door opening further includes a stopper 225 that is sleeved onto the transmission connection mechanism 220. The stopper 225 axially limits the transmission connection mechanism 220, thereby limiting its movement to the axial direction. Furthermore, the stopper 225 can be formed by a roller bearing and a retaining spring.

[0050] As a further preferred embodiment, the aforementioned drive device for electric door opening of an automobile further includes a first motor housing 224. The first motor housing 224 forms a cavity for accommodating the drive unit 21, the transmission unit 22, and the motion unit. The transmission fixed ring gear 223 is fixedly connected to the end of the first motor housing 224. The first motor housing 224 encases the drive unit 21, the transmission unit 22, and the motion unit, ensuring that the drive unit 21, the transmission unit 22, and the motion unit are coaxial, which also facilitates product design and installation.

[0051] As a further preferred embodiment, the aforementioned drive device for an electric vehicle door opening further includes a second motor housing 227, which houses the stopper 225. The end of the motion screw 23 is provided with a ball bearing 2290 for connecting to a drive crank 2291. The other end of the drive crank 2291 is connected to an external actuator. The actuator is used to connect to the vehicle door. The second motor housing 227 and the first motor housing 224 are interconnected.

[0052] As a further preferred embodiment, the aforementioned drive device for an electric vehicle door opening further includes a limit housing 226 connected to the first motor housing 224, and the limit housing 226 penetrates the first motor housing 224 and the second motor housing 227. A limit plate 228 is provided at the other end of the motion screw 23, the diameter of which matches that of the limit housing 226. The interaction between the limit housing 226 and the limit plate 228 ensures smooth transmission and positional accuracy of the motion screw 23.

[0053] When the distal end of the motion screw 23 is at the maximum distance away from the drive unit 21, the motion screw 23 is in the through cavity formed by the first motor housing 224, the second motor housing 227, and the limit housing 226. When the distal end of the motion screw 23 is at the minimum distance close to the drive unit 21, the motion screw 23 extends out of the through cavity formed by the first motor housing 224, the second motor housing 227, and the limit housing 226, and the distal end of the motion screw 23 is adjacent to the transmission fixed gear ring 223.

[0054] The present invention adopts planetary gears to transmit driving force, and its motor gear and motion screw 23 are on the same axis, which ensures the stability of the motion screw 23 during rotation, and the transmission efficiency is relatively high; secondly, the technical solution adopted by the present invention only needs to ensure that the first drive gear 210, the motion screw 23, and the transmission connection mechanism 220 are coaxial, and its installation difficulty is relatively low and the processing accuracy requirements are low; the movement of the motion screw 23 is driven by a nut, and its noise is relatively small, the structure is relatively simple, and the space occupied is relatively small, which is conducive to miniaturization design.

[0055] Example 2

[0056] An automobile comprises any one of the driving devices for electric automobile door opening described in the first embodiment, wherein the automobile door is connected to the proximal end of the motion screw. Schematically, the automobile door can be understood as an actuator.

[0057] List a specific implementation method

[0058] The above-mentioned automobile takes the example of clockwise rotation driving the tail end of the motion screw to move away from the drive unit or the transmission unit. Its working principle is specifically as follows: when the drive device is connected to electric energy to obtain driving current, the drive unit generates a driving magnetic field that rotates the first drive gear clockwise under the excitation of electric energy. The driving magnetic field acts on the first drive gear, and the first drive gear rotates under the action of the driving magnetic field, and during the rotation, it drives the transmission connection device of the transmission unit to rotate, and during the rotation of the transmission connection device, it drives the distal end of the motion screw to move away from the drive unit or the transmission unit. In this case, the car door can be closed. Conversely, by changing the direction of the driving current, the transmission unit can be controlled to drive the distal end of the motion screw to move toward the drive unit or the transmission unit, and at this time, the car door can be opened.

[0059] Although the present invention has been disclosed above with reference to preferred embodiments, the embodiments are merely examples for the purpose of illustration and are not intended to limit the present invention. Those skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present invention. The scope of protection claimed by the present invention shall be subject to the claims.

Claims

1. A driving device based on an electric door opening of an automobile, characterized in that: include: A driving unit, wherein a first driving gear is provided at the end of the driving device, and the first driving gear is driven to rotate in a predetermined direction when the driving device is powered on; A transmission unit, connecting the driving unit and the motion unit; the transmission unit includes a transmission connection mechanism, which drives the transmission connection mechanism to rotate when the first driving gear rotates; A motion unit, the motion unit comprising a motion screw matched with the transmission connection mechanism, which drives the motion screw to move when the transmission connection mechanism is in a rotating state; The driving unit, the transmission unit and the motion unit are coaxially arranged.

2. The driving device for electric door opening of a car according to claim 1, characterized in that: The driving unit includes: a brushless stator, wherein the brushless stator forms a driving magnetic field when the driving unit is powered on; A brushless rotor is built into the cavity of the brushless stator. One end of the brushless rotor is fixedly connected to the first driving gear for matching the transmission unit. Under the action of the driving magnetic field, the brushless rotor and the first driving gear are driven to rotate along the predetermined direction.

3. The driving device for electric door opening of a car according to claim 1, characterized in that: The transmission unit comprises: a second transmission gear set, the second transmission gear set being meshed and connected with the first driving gear and the transmission fixed ring gear; A transmission bracket, wherein the transmission bracket is provided with a transmission gear frame set matching the second transmission gear set and the transmission connection mechanism; wherein the transmission connection mechanism is provided with a thread matching the motion screw; When the first driving gear is in a rotating state, the second transmission gear set moves along the transmission fixed gear ring with the first driving gear as the center and drives the transmission connection mechanism to be in a rotating state.

4. The driving device for electric door opening of a car according to claim 1, characterized in that: It also includes a stopping device, which is sleeved on the transmission connection mechanism.

5. The driving device for electric door opening of a car according to claim 3, characterized in that: It also includes a first motor housing, which forms a cavity for accommodating the drive unit, the transmission unit and the motion unit, and the transmission fixed gear ring is fixedly connected to the end of the first motor housing.

6. The driving device for electric door opening of a car according to claim 5, characterized in that: Also included is a second motor housing that houses the stop device.

7. The driving device for electric door opening of a car according to claim 1, characterized in that: One end of the motion screw is provided with a ball bearing for connecting to a driving crank, and the other end of the driving crank is connected to an actuator.

8. The driving device for electric door opening of a car according to claim 1, characterized in that: It also includes a limiting shell connected to the first motor shell, and the limiting shell is connected to the first motor shell and the second motor shell.

9. The driving device for electric door opening of a car according to claim 1, characterized in that: The other end of the moving screw is provided with a limit baffle, and the diameter of the limit baffle matches the limit housing.

10. An automobile, characterized in that: A driving device based on an electric door opening of an automobile as described in any one of claims 1 to 9, wherein the moving screw of the driving device is connected to the vehicle door through a connecting device.

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