Electric driving mechanism of sunshade curtain

Abstract

The utility model relates to an electric driving mechanism of a sunshade curtain, which is used for the sunshade curtain of a motor vehicle and can be controlled to drive the curtain cloth of the sunshade curtain to unfold and fold, the electric driving mechanism comprises a transmission strip and a driving component, and the transmission strip is movably arranged on a casing of the driving component in a penetrating manner. According to the driving assembly, a driving wheel driven by a motor provides pushing force or pulling force for a transmission strip, a driven wheel pivoted to a machine shell and the driving wheel are oppositely arranged on the two opposite sides of the transmission strip, and the driven wheel is located on the other opposite side of the transmission strip to provide auxiliary abutting force. Therefore, the driving force applied to the transmission strip by the driving wheel driven by the motor can effectively and directly act on the transmission strip, and the driven wheel can be matched with the driving wheel to relatively clamp and drive the transmission strip to rotate, so that the transmission strip can be driven more directly and effectively, and the driving performance of the electric driving mechanism for driving the curtain cloth to unfold and fold is improved.

Description

Technical Field

[0001] The utility model relates to a sunshade curtain, in particular to an electric driving mechanism in the sunshade curtain which can drive the curtain cloth to unfold and fold. Background Art

[0002] The electric sunshade currently used for the windows of motor vehicles comprises a curtain reeling shaft group, a curtain, a guide rail mechanism and an electric drive mechanism. The curtain reeling shaft group can be installed on the front side of the window, the curtain is connected to the curtain reeling shaft group so that the curtain can be automatically reeled in by the curtain reeling shaft group, and the curtain can be pulled out from the curtain reeling shaft group and unfolded. The guide rail mechanism is laterally arranged with its guide rail below the window opening of the vehicle window, and has a rocker arm that can move laterally along the guide rail, the upper end of the rocker arm is connected to a movable side plate of the curtain, the electric drive mechanism extends its transmission bar into the guide rail and is connected to the bottom end of the rocker arm, and drives the transmission bar with a motor-driven driving wheel to provide thrust or pulling force to the transmission bar, thereby driving the rocker arm to drive the curtain to unfold or fold.

[0003] The electric drive mechanism in the above-mentioned existing sunshade can use the driving wheel driven by the motor to drive the transmission bar, and the transmission bar provides thrust or pulling force to drive the swing arm to drive the curtain to expand or close. However, in the existing electric drive mechanism, the rotational force of the driving wheel driven by the motor to push against the transmission bar is biased to one side of the transmission bar, making it difficult for the rotational driving force of the driving wheel to effectively act on the transmission bar, and even causing slippage between the driving wheel and the transmission bar, resulting in uneven driving force acting on the transmission bar, and unable to smoothly drive the transmission bar to drive the curtain to expand or close. In order to improve the quality requirements of electric sunshades, it is necessary to further improve the technical problems of the above-mentioned electric drive mechanism. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an electric drive mechanism for a sunshade, which solves the technical problems in the electric drive mechanism of the existing electric sunshade, that is, the rotational force of the active wheel driven by the motor to push against the transmission bar is biased on one side of the transmission bar, and the rotational driving force is difficult to effectively act on the transmission bar, resulting in uneven driving forces acting on the transmission bar, and the transmission bar cannot be driven smoothly to drive the curtain to unfold and close.

[0005] The technical solution proposed by the utility model is: to provide an electric drive mechanism for a sunshade, which is used for a sunshade of a motor vehicle and can controllably drive a curtain of the sunshade to unfold and fold, wherein: the electric drive mechanism includes a transmission bar and a drive assembly, the transmission bar can drive the curtain, the drive assembly includes a housing, a driving wheel, a driven wheel and a motor, wherein the housing provides a transmission bar moving path, the transmission bar can be movably arranged on the transmission bar moving path; the driving wheel and the driven wheel are respectively pivotally arranged on the housing and are located on opposite sides of the transmission bar moving path, and are in frictional contact with the transmission bar arranged on the transmission bar moving path; the motor is arranged on the housing and can provide rotational power to the driving wheel.

[0006] In the electric drive mechanism of the sunshade as described above, the electric drive mechanism further includes a transmission gear set, which includes a first transmission gear and a second transmission gear. The first transmission gear is coaxially connected to the driving wheel, and the second transmission gear is coaxially connected to the driven wheel and meshes with the first transmission gear. The motor can drive the driving wheel to rotate and synchronously drive the driven wheel through the transmission gear set.

[0007] In the electric drive mechanism of the sunshade as described above, the electric drive mechanism further includes a torque storage unit, which is connected to the driven wheel and can provide auxiliary force for forward or reverse rotation of the driven wheel and provide auxiliary thrust or pulling force to the transmission bar.

[0008] In the electric drive mechanism of the sunshade as described above, the torque storage unit includes a base, a connecting rod and a torsion spring. The base is arranged on the housing and has a accommodating chamber. The connecting rod is pivotally arranged in the accommodating chamber of the base, and the connecting rod is coaxially connected to the driven wheel. The torsion spring is arranged in the accommodating chamber of the base and connected between the base and the connecting rod. The pre-stored torsional elastic force of the torsion spring acts on the driven wheel.

[0009] In the electric drive mechanism of the sunshade as described above, the electric drive mechanism further includes an auxiliary torque supply component, which includes an auxiliary drive wheel and a torque energy storage unit. The auxiliary drive wheel is pivotally disposed on the housing and is located on the same side of the moving path of the transmission bar as the driven wheel. The auxiliary drive wheel is in friction contact with the transmission bar. The torque energy storage unit is connected to the auxiliary drive wheel. The torque energy storage unit can provide rotational force to the auxiliary drive wheel and provide auxiliary thrust or pulling force to the transmission bar through the auxiliary drive wheel.

[0010] In the electric drive mechanism of the sunshade as described above, the torsion energy storage unit includes a seat, an axle and a torsion spring. The seat is arranged on the casing and has a accommodating space. The seat is coaxially connected to the auxiliary drive wheel and can rotate together. The axle is pivotally arranged in the accommodating space of the seat, and the axle is fixed to the casing. The torsion spring is arranged in the accommodating space of the seat and connected between the seat and the axle. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsion elastic force, and provide auxiliary thrust or pulling force to the transmission bar through the auxiliary drive wheel.

[0011] In the electric drive mechanism of the sunshade as described above, the torsion energy storage unit includes a seat, an axis and a torsion spring. The seat is fixed on the casing and has a accommodating space. The axis is pivotally mounted in the accommodating space of the seat, and the axis is coaxially connected to the auxiliary drive wheel and can rotate together. The torsion spring is arranged in the accommodating space of the seat and connected between the seat and the axis. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsion elastic force, thereby providing auxiliary thrust or pulling force to the transmission bar through the auxiliary drive wheel.

[0012] In the electric drive mechanism of the sunshade as described above, a groove matching the transmission bar is formed in the casing, the transmission bar can be movably arranged in the groove, and the groove serves as the moving path of the transmission bar. The casing forms a driving wheel chamber and a driven wheel chamber connected to the groove on opposite sides of the groove, and the driving wheel and the driven wheel are pivotally arranged in the driving wheel chamber and the driven wheel chamber respectively.

[0013] The beneficial effect that can be achieved by the utility model is that when the electric drive mechanism is applied to the window sunshade of a motor vehicle, on the basis of the motor-driven driving wheel providing thrust or pulling force to the transmission bar, the driven wheel pivotally mounted on the housing is arranged on opposite sides of the transmission bar relative to the driving wheel, and the driven wheel is located on the other side of the transmission bar to provide auxiliary abutment force, so that the driving force applied by the motor-driven driving wheel to the transmission bar can effectively and directly act on the transmission bar, and the driven wheel can cooperate with the driving wheel to relatively clamp and drive the transmission bar to rotate, so that the transmission bar can be driven more directly and effectively, and the force acting on the transmission bar is maintained in a balanced state, thereby improving the driving performance of the electric drive mechanism to drive the curtain to unfold and retract.

[0014] In the electric drive mechanism of the sunshade of the utility model, a transmission gear set is further used to connect the driving wheel and the driven wheel. When the motor drives the driving wheel to rotate, the driven wheel is synchronously driven by the transmission gear set, so that the driven wheel obtains part of the driving force of the motor and can act on the transmission bar, providing a stable driving force for the transmission bar.

[0015] In the electric drive mechanism of the sunshade of the utility model, a torque storage unit can be further used to connect the driven wheel, and the torque stored in the torque storage unit can provide auxiliary force for forward or reverse rotation through the driven wheel, thereby providing auxiliary thrust or pulling force to the transmission bar. When the driving wheel driven by the motor drives the transmission bar, the torque storage unit provides auxiliary force to the transmission bar through the driven wheel, which helps drive the transmission bar and reduces the load of the motor, so that the current value of the motor driving the driving wheel tends to be balanced, thereby extending the service life of the motor.

[0016] In the electric drive mechanism of the sunshade of the utility model, an auxiliary torque supply component can be further arranged on the casing, and the auxiliary torque supply component includes an auxiliary drive wheel and a torque energy storage unit connected to the auxiliary drive wheel. The auxiliary drive wheel and the driven wheel are located on the same side of the moving path of the transmission bar, and the auxiliary drive wheel is in frictional contact with the transmission bar. The torque stored in the torque energy storage unit can provide rotational force to the auxiliary drive wheel, and provide auxiliary thrust or pulling force to the transmission bar through the auxiliary drive wheel, which is helpful for driving the transmission bar and reduces the load of the motor, so that the current value of the motor driving the driving wheel tends to be balanced, thereby extending the service life of the motor.

[0017] In the electric drive mechanism of the sunshade of the present invention, it further utilizes a groove formed in the casing to match the transmission bar, and a driving wheel chamber and a driven wheel chamber connected to the groove are respectively formed on opposite sides of the groove. The transmission bar can be movably arranged in the groove, and the groove serves as the moving path of the transmission bar. The driving wheel and the driven wheel are respectively pivotally arranged in the driving wheel chamber and the driven wheel chamber and relatively clamp the transmission bar. While the driving wheel driven by the motor is combined with the driven wheel to relatively clamp the drive transmission bar, the linear guidance and limiting of the transmission bar by the casing are assisted by the groove of the casing, thereby improving the stability of the drive assembly in driving the transmission bar to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view of the first embodiment of the electric drive mechanism of the utility model applied to an electric sunshade curtain, with the curtain in a folded state.

[0019] Figure 2 It is a plan view of the first embodiment of the electric drive mechanism of the utility model applied to an electric sunshade curtain, with the curtain in an unfolded state.

[0020] Figure 3 yes Figure 1 and Figure 2 A three-dimensional schematic diagram of a first embodiment of the electric drive mechanism is shown.

[0021] Figure 4 yes Figure 3A partial exploded schematic diagram of a first embodiment of the electric drive mechanism is shown.

[0022] Figure 5 It is a three-dimensional schematic diagram of the second embodiment of the electric drive mechanism of the utility model.

[0023] Figure 6 yes Figure 5 A partial exploded schematic diagram of a second embodiment of the electric drive mechanism is shown.

[0024] Figure 7 It is a three-dimensional schematic diagram of a third embodiment of the electric drive mechanism of the utility model.

[0025] Figure 8 yes Figure 7 A partially exploded schematic diagram of a third embodiment of the electric drive mechanism is shown.

[0026] Fig. 9 It is a three-dimensional schematic diagram of a fourth embodiment of the electric drive mechanism of the utility model.

[0027] Fig.10 yes Fig. 9 A partial exploded schematic diagram of a fourth embodiment of the electric drive mechanism is shown.

[0028] Fig.11 It is a three-dimensional schematic diagram of the fifth embodiment of the electric drive mechanism of the utility model.

[0029] Fig.12 yes Fig.11 A partially exploded schematic diagram of a fifth embodiment of the electric drive mechanism is shown.

[0030] Description of reference numerals:

[0031] 1: Fabric take-up shaft assembly

[0032] 2: Curtain fabric

[0033] 3: Curtain edge panel

[0034] 4: Guiding mechanism

[0035] 4A: Guide rail

[0036] 4B: Rocker arm

[0037] 10: Electric drive mechanism

[0038] 11: Transmission bar

[0039] 12: Drive components

[0040] 120: Chassis

[0041] 1201: Groove

[0042] 1202: Driving wheel room

[0043] 1203: driven wheel chamber

[0044] 121: Driving wheel

[0045] 122: driven wheel

[0046] 123: Motor

[0047] 13: Transmission gear set

[0048] 131: First transmission gear

[0049] 132: Second transmission gear

[0050] 14: Torque storage unit

[0051] 141: Base

[0052] 1410: Accommodation Room

[0053] 142: Connecting rod

[0054] 143: Torsion spring

[0055] 15: Auxiliary torque supply component

[0056] 151: Auxiliary drive wheel

[0057] 152: Torque energy storage unit

[0058] 1521:Base body

[0059] 1522: Accommodation space

[0060] 1523: Shaft

[0061] 1524:Torsion spring. DETAILED DESCRIPTION

[0062] The following is a detailed description of the technical means used by the present invention to achieve the intended purpose of the present invention with reference to the accompanying drawings and embodiments of the present invention.

[0063] like Figure 1 and Figure 2As shown, the electric drive mechanism 10 of the utility model is used in an electric sunshade at the window of a motor vehicle. Basically, the electric sunshade includes a curtain reeling shaft group 1, a curtain 2 and an electric drive mechanism 10. The curtain reeling shaft group 1 can be installed on one side of the window. One side of the curtain 2 is connected to the curtain reeling shaft group 1, so that the curtain can be automatically reeled by the curtain reeling shaft group 1, and the curtain can be pulled out from the curtain reeling shaft group 1 and unfolded. The other side of the curtain 2 extending out of the curtain reeling shaft group 1 has a curtain side plate 3. The electric drive mechanism 10 is installed in the motor vehicle, and the electric drive mechanism 10 can controllably drive the curtain side plate 3 to move, so that the curtain 2 can be unfolded and folded.

[0064] by Figure 1 and Figure 2 Taking the electric sunshade embodiment shown as an example, the electric drive mechanism 10 is combined with the guide mechanism 4 to connect the curtain side plate 3. The guide mechanism 4 includes a guide rail 4A and a rocker arm 4B. The guide rail 4A is horizontally arranged below the window of the vehicle window. The upper end of the rocker arm 4B is pivotally connected to the curtain side plate 3. The lower end of the rocker arm 4B has a slider, which is located in the guide rail 4A and can move along the guide rail 4A. The electric drive mechanism 10 extends into the guide rail 4A to connect the slider at the bottom of the rocker arm 4B, and the electric drive mechanism 10 can controllably drive the slider to move along the guide rail 4A, and drive the curtain 2 to be pulled out of the curtain rewinding shaft group 1 or to be retracted into the curtain rewinding shaft group 1 through the rocker arm 4B on the slider. The guide mechanism 4 is an existing product, and its specific structure is not repeated. The above is an embodiment in which the electric drive mechanism 10 is connected and can drive the curtain 2 to be unfolded and retracted, but it is not limited to this.

[0065] like Figure 3 , Figure 5 , Figure 7 , Fig. 9 and Fig.11 As shown in the figures, multiple embodiments of the electric drive mechanism 10 of the sunshade of the utility model are disclosed. As can be seen from the figures, the electric drive mechanism 10 includes a transmission bar 11 and a drive assembly 12. The following describes various embodiments of the electric drive mechanism 10 of the utility model.

[0066] like Figure 3 and Figure 4 In the first embodiment shown, the transmission bar 11 is a flexible long strip component that can bend and restore. One end of the transmission bar 11 is connected to the slider at the bottom end of the rocker arm 4B to drive the slider to move along the guide rail 4A, thereby driving the curtain side plate 3 to move, so that the curtain 2 can be unfolded and folded.

[0067] like Figure 3 and Figure 4As shown, the driving assembly 12 includes a housing 120, a driving wheel 121, a driven wheel 122 and a motor 123.

[0068] like Figure 3 and Figure 4 As shown, the housing 120 provides a transmission bar moving path 1200, and the transmission bar 11 is disposed in the transmission bar moving path 1200 and can move. In this embodiment, a groove 1201 is formed in the housing 120, and the diameter of the groove 1201 matches the diameter of the transmission bar 11. The transmission bar 11 is disposed in the groove 1201 and can move in the groove 1201, and the groove 1201 serves as the transmission bar moving path. Figure 3 and Figure 4 In the illustrated embodiment, the housing 120 forms a driving wheel chamber 1202 and a driven wheel chamber 1203 communicating with the channel 1201 at opposite sides of the channel 1201 .

[0069] like Figure 3 and Figure 4 As shown, the driving wheel 121 and the driven wheel 122 are respectively pivotally disposed on opposite sides of the transmission bar moving path 1200 of the housing 120 and are in frictional contact with the transmission bar 11 disposed on the transmission bar moving path 1200 , so that the driving wheel 121 and the driven wheel 122 can clamp and drive the transmission bar 11 .

[0070] In this embodiment, the driving wheel 121 and the driven wheel 122 are respectively pivoted on opposite sides of the channel 1201 and are in frictional contact with the transmission bar 11 disposed in the channel 1201. The driving wheel 121 and the driven wheel 122 are both gear-shaped. The driving wheel 121 and the driven wheel 122 are respectively pivoted in the driving wheel chamber 1202 and the driven wheel chamber 1203 and extend into the channel 1201 to tightly abut against and relatively clamp the transmission bar 11.

[0071] like Figure 3 and Figure 4 As shown, the motor 123 is installed in the housing 120 and is directly or indirectly connected to the driving wheel 121 to provide rotational power to the driving wheel 121. When the motor 123 is indirectly connected to the driving wheel 121, the motor 123 and the driving wheel 121 can be connected and transmitted through a gear train transmission component such as a combination of a worm gear and a worm, a gear set, etc. The connection method and transmission method between the motor 123 and the driving wheel 121 belong to the prior art and will not be repeated here.

[0072] By the aforementioned Figure 3 and Figure 4In the embodiment shown, when the electric drive mechanism 10 is controlled to drive the transmission bar 11 to drive the curtain edge plate 3, the driving wheel 121 driven by the motor 123 cooperates with the driven wheel 122 to relatively clamp the transmission bar 11, and while the driving wheel 121 provides thrust or pulling force on one side of the transmission bar 11, the driven wheel 122 provides auxiliary abutting force on the other side of the transmission bar 11, ensuring that the rotational force output by the driving wheel 121 can directly and effectively act on the transmission bar 11, so that the transmission bar 11 can be driven smoothly, and the curtain 2 can be smoothly driven to unfold and close.

[0073] like Figure 5 and Figure 6 The second embodiment shown in the figure further adds a transmission gear set 13 on the basis of the composition structure of the aforementioned first embodiment. The transmission gear set 13 includes a first transmission gear 131 and a second transmission gear 132. The first transmission gear 131 is coaxially connected to the driving wheel 121, and the second transmission gear 132 is coaxially connected to the driven wheel 122 and meshes with the first transmission gear 131. Whereby, when the motor 123 drives the driving wheel 121 to rotate, the driven wheel 122 is synchronously driven through the transmission gear set 13, so that the driving wheel 121 and the driven wheel 122 can clamp and drive the transmission bar 11.

[0074] like Figure 7 and Figure 8 The third embodiment shown in the figure, based on the composition structure of the aforementioned first embodiment, further adds a torque storage unit 14, and the torque storage unit 14 is connected to the driven wheel 122. The torque storage unit 14 can provide auxiliary force for forward or reverse rotation of the driven wheel 122, so as to provide auxiliary thrust or pulling force to the transmission bar 11, so as to provide appropriate torque when the curtain 2 of the sunshade is unfolded or folded, so that the current value of the motor 123 driving the driving wheel 121 tends to be balanced, thereby extending the service life of the motor 123.

[0075] At Figure 7 and Figure 8In the third embodiment shown, the torque storage unit 14 includes a base 141, a connecting rod 142, and a torsion spring 143. The base 141 is disposed on the housing 120 and has a receiving chamber 1410. The connecting rod 142 is pivotally disposed in the receiving chamber 1410 of the base 141, and the connecting rod 142 is coaxially connected with the driven wheel 122, or the connecting rod 142 and the spindle of the driven wheel 122 are integrally formed. The torsion spring 143 is disposed in the receiving chamber 1410 of the base 141 and connected between the base 141 and the connecting rod 142. The torsion spring 143 acts on the driven wheel 122 through the torsion elastic force stored in the torsion spring 143, and provides auxiliary thrust or pulling force when the driven wheel 122 drives the transmission bar 11. The base 141 may be formed integrally with the housing 120 , or the base 141 may be an independent component and fixed to the housing 120 by bonding or fixing.

[0076] like Fig. 9 and Fig.10 The fourth embodiment shown in the figure is based on the composition structure of the aforementioned first embodiment, and further adds an auxiliary torque supply component 15, the auxiliary torque supply component 15 includes an auxiliary drive wheel 151 and a torque energy storage unit 152, the auxiliary drive wheel 151 is pivoted on the housing 120 and is located on the same side of the transmission bar moving path 1200 as the driven wheel 122, the auxiliary drive wheel 151 is in friction contact with the transmission bar 11 located on the transmission bar moving path 1200, and the torque energy storage unit 152 is provided. 2 is connected to the auxiliary driving wheel 151, and the torque energy storage unit 152 can provide forward or reverse rotational force to the auxiliary driving wheel 151, and provide auxiliary thrust or pulling force to the transmission bar 11 through the auxiliary driving wheel 151, thereby, when the curtain 2 of the sunshade is unfolded or folded, the driving wheel 121 and the driven wheel 122 that relatively clamp the driving transmission bar 11 provide appropriate auxiliary rotational force, so that the current value of the motor 123 driving the driving wheel 121 tends to be balanced, thereby extending the service life of the motor 123.

[0077] At Fig. 9 and Fig.10In the fourth embodiment shown, the torque energy storage unit 152 includes a seat 1521, a shaft 1523 and a torsion spring 1524. The seat 1521 is located on the housing 120 and has a receiving space 1522. The shaft 1523 is pivotally disposed in the receiving space 1522 of the seat 1521. The seat 1521 is coaxially connected to the auxiliary driving wheel 151, and the shaft 1523 is fixed to the housing 120. The seat body 1521 and the auxiliary driving wheel 151 rotate together. The torsion spring 1524 is disposed in the accommodating space 1522 of the seat body 1521 and connected between the seat body 1521 and the shaft 1523. The auxiliary driving wheel 151 is driven to rotate through the seat body 1521 or the shaft 1523 by the torsion elastic force pre-stored in the torsion spring 1524, so that the auxiliary driving wheel 151 can provide auxiliary thrust or pulling force to the transmission bar 11.

[0078] In addition, the torque energy storage unit 152 can also be changed into the base body 1521 fixed on the housing 120, wherein the base body 1521 can be formed integrally with the housing 120, or the base body 1521 is an independent component and is fixed on the housing 120 by bonding or fixing structure, the shaft 1523 is pivoted in the accommodating space 1522 of the base body 1521, and the shaft 1523 and the auxiliary driving wheel 151 are coaxially connected or formed integrally, so that the shaft 1523 and the auxiliary driving wheel 151 rotate together.

[0079] like Fig.11 and Fig.12 The fifth embodiment shown is based on the composition structure of the second embodiment including the transmission gear set 13, and further adds an auxiliary torque supply component 15. The composition structure of the auxiliary torque supply component 15 and the connection relationship between the auxiliary torque supply component 15 and the transmission bar 11 are the same as those of the aforementioned fourth embodiment, that is, the auxiliary torque supply component 15 also includes an auxiliary driving wheel 151 and the torque energy storage unit 152 connected to the auxiliary driving wheel 151. The auxiliary driving wheel 151 is in friction contact with the transmission bar 11 arranged in the groove 1201. The torque energy storage unit 152 provides forward or reverse rotational force to the auxiliary driving wheel 151, and provides auxiliary thrust or pulling force to the transmission bar 11 through the auxiliary driving wheel 151. The specific structural description of the auxiliary driving wheel 151 and the torque energy storage unit 152 is as mentioned above and will not be repeated here.

[0080] The above description is only an embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in the form of embodiments, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical contents of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An electric drive mechanism for a sunshade, which is used for a sunshade of a motor vehicle and can controllably drive a curtain of the sunshade to unfold and fold, and is characterized by: The electric drive mechanism includes a transmission bar and a drive assembly, the transmission bar can drive the curtain, the drive assembly includes a housing, a driving wheel, a driven wheel and a motor, wherein: The housing provides a transmission bar moving path, and the transmission bar is movably arranged on the transmission bar moving path; The driving wheel and the driven wheel are respectively pivotally mounted on the housing and located at opposite sides of the transmission bar moving path, and are in frictional contact with the transmission bar located on the transmission bar moving path; The motor is arranged on the housing and can provide rotational power to the driving wheel.

2. The electric drive mechanism of the sunshade according to claim 1, characterized in that: The electric drive mechanism further includes a transmission gear set, which includes a first transmission gear and a second transmission gear. The first transmission gear is coaxially connected to the driving wheel, and the second transmission gear is coaxially connected to the driven wheel and meshes with the first transmission gear. The motor can drive the driving wheel to rotate and synchronously drive the driven wheel through the transmission gear set.

3. The electric drive mechanism of the sunshade according to claim 1, characterized in that: The electric drive mechanism further comprises a torque storage unit, which is connected to the driven wheel and can provide auxiliary force for forward or reverse rotation of the driven wheel and provide auxiliary thrust or pulling force to the transmission bar.

4. The electric drive mechanism of the sunshade according to claim 3, characterized in that: The torque storage unit includes a base, a connecting rod and a torsion spring. The base is arranged on the housing and has a accommodating chamber. The connecting rod is pivotally arranged in the accommodating chamber of the base, and the connecting rod is coaxially connected to the driven wheel. The torsion spring is arranged in the accommodating chamber of the base and connected between the base and the connecting rod. The pre-stored torsional elastic force of the torsion spring acts on the driven wheel.

5. The electric drive mechanism of the sunshade according to claim 1 or 2, characterized in that: The electric drive mechanism further includes an auxiliary torque supply component, which includes an auxiliary drive wheel and a torque energy storage unit. The auxiliary drive wheel is pivotally arranged on the housing and is located on the same side of the moving path of the transmission bar as the driven wheel. The auxiliary drive wheel is in friction contact with the transmission bar. The torque energy storage unit is connected to the auxiliary drive wheel. The torque energy storage unit can provide rotational force to the auxiliary drive wheel and provide auxiliary thrust or pulling force to the transmission bar through the auxiliary drive wheel.

6. The electric drive mechanism for the sunshade according to claim 5, characterized in that: The torsion energy storage unit includes a seat, an axle and a torsion spring. The seat is arranged on the casing and has a accommodating space. The seat is coaxially connected to the auxiliary drive wheel and can rotate together. The axle is pivotally arranged in the accommodating space of the seat and is fixed to the casing. The torsion spring is arranged in the accommodating space of the seat and connected between the seat and the axle. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsion elastic force, thereby providing auxiliary thrust or pulling force to the transmission bar through the auxiliary drive wheel.

7. The electric drive mechanism for sunshade according to claim 5, characterized in that: The torsion energy storage unit includes a seat, an axle and a torsion spring. The seat is fixed on the housing and has a accommodating space. The axle is pivoted in the accommodating space of the seat, and the axle is coaxially connected with the auxiliary drive wheel and can rotate together. The torsion spring is arranged in the accommodating space of the seat and connected between the seat and the axle. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsion elastic force, thereby providing auxiliary thrust or pulling force to the transmission bar through the auxiliary drive wheel.

8. The electric drive mechanism of the sunshade according to any one of claims 1 to 4, characterized in that: A groove matching the transmission bar is formed in the housing, and the transmission bar can be movably arranged in the groove, and the groove serves as the moving path of the transmission bar. The housing forms a driving wheel chamber and a driven wheel chamber connected to the groove on opposite sides of the groove, and the driving wheel and the driven wheel are pivotally arranged in the driving wheel chamber and the driven wheel chamber respectively.

9. The electric drive mechanism for sunshade according to claim 6, characterized in that: A groove matching the transmission bar is formed in the housing, and the transmission bar can be movably arranged in the groove, and the groove serves as the moving path of the transmission bar. The housing forms a driving wheel chamber and a driven wheel chamber connected to the groove on opposite sides of the groove, and the driving wheel and the driven wheel are pivotally arranged in the driving wheel chamber and the driven wheel chamber respectively.

10. The electric drive mechanism for sunshade according to claim 7, characterized in that: A groove matching the transmission bar is formed in the housing, and the transmission bar can be movably arranged in the groove, and the groove serves as the moving path of the transmission bar. The housing forms a driving wheel chamber and a driven wheel chamber connected to the groove on opposite sides of the groove, and the driving wheel and the driven wheel are pivotally arranged in the driving wheel chamber and the driven wheel chamber respectively.

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