CN212562909U

CN212562909U - Automobile door driving mechanism

Info

Publication number: CN212562909U
Application number: CN202020659167.XU
Authority: CN
Inventors: 潘忠利
Original assignee: Wuxi Krapelong Automotive Technology Co ltd
Current assignee: Wuxi Krapelong Automotive Technology Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2021-02-19
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses an automobile door driving mechanism, which comprises a power unit for providing power and an execution unit connected with an automobile door, wherein the power unit is provided with a motor and a gear box which are respectively arranged in the automobile door, and a power output shaft of the motor is connected with a force input part I of the gear box in a positioning way; the execution unit is provided with a screw rod and a screw nut sleeved on the screw rod in a threaded manner, one shaft end of the screw rod is freely arranged in the automobile door, the other shaft end of the screw rod movably penetrates through the rear part of the automobile door and is rotatably connected with the automobile body, the screw nut is also arranged in the automobile door, and the screw nut is also in transmission connection with the output shaft of the gear box through a transmission unit. The automobile door driving mechanism is simple and reasonable in structure, high in operation precision and stability, small in occupied installation space and low in technical requirements on production process and assembly, and the automobile door driving mechanism is easier to install and apply.

Description

Automobile door driving mechanism

Technical Field

The utility model relates to an automobile drive technical field specifically provides a car door actuating mechanism.

Background

Automobile door on the existing market can realize electronic opening and closing, and realize the door actuating mechanism routine adoption following structure of above-mentioned electric switch door function: comprises a motor, a gear box, a transmission gear and a limit arm, wherein the motor and the gear box are both arranged in the door of the automobile, the power output shaft of the motor is connected with the input shaft or the input gear of the gear box in a positioning way, the transmission gear is positioned and sleeved on the output shaft of the gear box, the limiting arm is provided with a strip-shaped arm main body and a rack which is positioned on the arm main body and extends along the length direction of the arm main body, one end of the arm main body in the length direction is freely arranged in the automobile door, the other end of the arm main body in the length direction movably penetrates through the automobile door and is rotatably connected with the automobile body, the rack is also meshed and connected with the transmission gear, namely, the limiting arm can perform reciprocating movement positioning under the synergistic action of the motor, the gear box and the transmission gear so as to realize the door opening or closing action of the automobile door.

Although the vehicle door driving mechanism can realize the electric door opening and closing with time saving, labor saving and high safety, firstly, the vehicle door driving mechanism occupies larger installation space and is not beneficial to the installation of other devices; secondly, the design requirements of the vehicle door driving mechanism on the transmission gear and the limiting arm are high, and if the structure/size matching is not ideal, the stability and accuracy of the limiting arm during moving are not ideal, so that the opening and closing degree of the vehicle door is not ideal, and the use safety performance of the vehicle door is reduced.

In view of this, the present invention is especially provided.

Disclosure of Invention

In order to overcome the defects, the utility model provides a car door actuating mechanism, its simple structure, reasonable, operation precision and stability are high, occupy installation space little, and are low to production technology and the technical requirement of assembling for car door actuating mechanism changes in the installation and uses.

The utility model discloses a solve the technical scheme that its technical problem adopted and be: a car door driving mechanism comprises a power unit for providing power and an execution unit connected with a car door, wherein the power unit is provided with a motor and a gear box which are respectively arranged in the car door, and a power output shaft of the motor is connected with a force input part I of the gear box in a positioning way; the execution unit is provided with a screw rod and a screw nut sleeved on the screw rod in a threaded manner, one shaft end of the screw rod is freely arranged in the automobile door, the other shaft end of the screw rod movably penetrates through the automobile door and is rotatably connected with the automobile body, the screw nut is also arranged in the automobile door, and the screw nut is also in transmission connection with the output shaft of the gear box through a transmission unit.

As a further improvement of the utility model, the motor and the gear box are positioned in the automobile door in a transverse linear arrangement;

the input part I of the gear box adopts an input shaft or an input gear structure; and a connecting piece with connecting and slipping functions is arranged on the output shaft of the gear box.

As a further improvement, the connector has a supply with II location of the income power portion of drive unit connects the spline housing, spline housing tight fit inlay install in the output shaft of gear box, just be in the spline housing with it is equipped with a friction shell fragment to go back the cover between the output shaft.

As a further improvement of the utility model, the transmission unit has a transmission shaft, two belt pulleys and a synchronous belt, wherein, the transmission shaft is promptly the portion of exerting oneself II of transmission unit, the transmission shaft is transverse arrangement, just an axle end location of transmission shaft peg graft in the spline housing, two the belt pulley is arranged along vertical interval, and cup joint respectively in another axle end of transmission shaft with on the screw-nut, and two the belt pulley still passes through the synchronous belt transmission is connected.

As a further improvement of the present invention, two belt pulleys are respectively defined as a first belt pulley and a second belt pulley, wherein the first belt pulley is positioned and sleeved on the other shaft end of the transmission shaft, the second belt pulley is sleeved outside the screw nut and can drive the screw nut to rotate, and the screw nut and the screw together can slightly swing relative to the second belt pulley;

in addition, the structure that the second belt pulley is sleeved outside the screw rod nut and can drive the screw rod nut to rotate, and the screw rod nut and the screw rod can slightly swing relative to the second belt pulley is as follows: the lead screw nut is provided with a nut main body in a spherical ring shape, internal threads matched with the lead screw are formed on the inner surface of the nut main body, and two clamping grooves extending along the spherical surface meridian of the nut main body are symmetrically arranged on the outer surface of the nut main body; the second belt pulley has two half cylinders that can dock and form a cylinder cover barrel structure, two respectively integrated into one piece have one along its circumference extending's semi-circular cingulum on the surface of half cylinder, and two semi-circular cingulum can also dock form one with synchronous belt looks drive fit's closed cingulum ring, two be formed with two calorie of posts on the internal surface of half cylinder relatively, and two the joint that the card post corresponds respectively in two in the draw-in groove.

As a further improvement, the utility model discloses a two the semicircular tooth area is formed respectively in two the middle part position department of semi-cylinder external surface, two the card post is formed respectively in two the middle part position department of semi-cylinder internal surface.

As a further improvement of the utility model, the screw rod is transversely arranged, and a hemispherical protection head is positioned and connected on one shaft end of the screw rod;

the inner surfaces of two shaft ends of the two semi-cylinders are inclined planes formed by extending in an outward inclined mode, the two inclined planes located on the same shaft side are in butt joint to form an inclined ring surface, and the inclined ring surface faces one shaft end of the screw rod and can be used for stopping and limiting the protective head.

As a further improvement, the utility model realizes that the structure of being connected is worn to establish behind the car door and with car body rotation by the activity of another axle head of lead screw is: be equipped with coupling assembling, coupling assembling have a location connect in the erection support on the automobile body, a location connect in round pin axle and a activity on the erection support cup joint in the epaxial cover that rotates of round pin, just rotate the cover still with another axle head fixed connection of lead screw.

As a further improvement of the utility model, still be equipped with one and be used for acceping the local first shell of lead screw and one are used for acceping the drive unit with screw-nut's second shell, first shell with the equal fixed mounting of second shell is on car door inner wall, just the second shell still respectively with first shell reaches the casing location of gear box is connected.

As a further improvement of the present invention, the first housing and the second housing are alternatively fixed to the inner wall of the door through a metal bracket.

The utility model has the advantages that: 1) compared with the prior art, car door actuating mechanism is when can realizing car door electric switch function, has still emphatically carried out following improvement: the integral structure of the vehicle door driving mechanism is simplified, and the method comprises the following steps: a screw rod linear die assembly is adopted as an execution unit, and a synchronous belt pulley assembly is adopted as a transmission unit; the improvement not only ensures the stability and the accuracy of the operation of the vehicle door driving mechanism, but also greatly reduces the technical requirements of the vehicle door driving mechanism on the production process and the assembly, so that the vehicle door driving mechanism is easy to produce, install and apply integrally; secondly, the installation layout mode of the vehicle door driving mechanism is optimized, such as: the motor and the gear box are designed to be transversely and linearly arranged, and the screw rod is designed to be transversely arranged; the improvement can effectively reduce the overall installation space of the vehicle door driving mechanism and is beneficial to the installation of other devices. 2) The output shaft of the gear box is provided with a connecting piece with connecting and slipping functions, so that the damage to the teeth inside the gear box is not easily caused, and the protection effect on the gear box is well improved. 3) The nut main body is designed into a spherical ring shape, namely the spherical ring is similar to a universal joint structure, so that the screw rod can slightly swing relative to the automobile door, the bad conditions such as blocking, blocking and the like can not occur in the door opening process, and the door opening and closing operation is facilitated. 4) Through be connected with one on the one end of lead screw location and be hemispherical protection head, and form on the second belt pulley can be right the protection head carries out the spacing slope anchor ring of backstop, and when the door was opened the open position like this, the slope anchor ring can be right the protection head carries out the backstop spacing, just can effectively prevent to warp the damage phenomenon because of door or panel beating that the artificial violence continues to extrapolate the door and cause, plays fine door and crosses the open guard action.

Drawings

Fig. 1 is a schematic perspective view of the driving mechanism of the vehicle door according to the present invention;

FIG. 2 is a schematic cross-sectional view of the door actuating mechanism of the vehicle shown in FIG. 1;

FIG. 3 is a schematic view of a partial structure of the driving mechanism of the vehicle door according to the present invention;

FIG. 4 is a cross-sectional schematic view of the vehicle door drive mechanism of FIG. 3;

FIG. 5 is an enlarged view of the portion A shown in FIG. 4;

FIG. 6 is an enlarged view of the portion B shown in FIG. 4;

FIG. 7 is a schematic view of an assembly structure of the actuator unit and a pulley of the present invention when assembled together;

fig. 8 is a schematic structural view of the actuating unit of the present invention assembled with half of the pulley.

The following description is made with reference to the accompanying drawings:

1-a power unit; 10, a motor; 11-a gearbox; 2-an execution unit; 20-a screw rod; 21-a feed screw nut; 210 — a nut body; 211-card slot; 3-a transmission unit; 30-a transmission shaft; 31-a belt pulley; 310-a half cylinder; 311-semicircular toothed belt; 312-clamping column; 313-inclined plane; 32-a timing belt; 4-a coupling member; 40-spline housing; 41-friction spring plate; 5-protecting the head; 60, mounting a support; 61-pin shaft; 62, rotating the sleeve; 71-a first housing; 72 — a second housing; and 8, a metal bracket.

Detailed Description

Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

It should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relation or adjustment of the size should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the function and the achievable purpose of the present invention. The terms "first", "second", "I" and "II" used herein are for convenience of description and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the structures can be changed or adjusted without substantial technical changes.

Example 1:

please refer to fig. 1 to fig. 6, which are a schematic diagram of a three-dimensional structure, a schematic diagram of a sectional structure, a schematic diagram of a partial sectional structure, and a schematic diagram of a partial enlarged structure of the vehicle door driving mechanism according to the present invention.

The utility model discloses an automobile door driving mechanism comprises a power unit 1 for providing power and an execution unit 2 connected with an automobile door, wherein the power unit 1 is provided with a motor 10 and a gear box 11 which are respectively arranged in the automobile door, and a power output shaft of the motor 10 is connected with a force input part I of the gear box 11 in a positioning way; the execution unit 2 is provided with a screw rod 20 and a screw nut 21 sleeved on the screw rod 20 in a threaded manner, one shaft end of the screw rod 20 is freely arranged in an automobile door, the other shaft end of the screw rod 20 movably penetrates through the automobile door and is rotationally connected with an automobile body, the screw nut 21 is also arranged in the automobile door, and the screw nut 21 is also in transmission connection with a force output shaft of the gear box 11 through a transmission unit 3; namely, the screw rod can perform reciprocating movement positioning along the self axial direction under the cooperative driving of the power unit and the transmission unit so as to realize the door opening or closing action of the automobile door.

In the present embodiment, it is preferable that the motor 10 and the gear box 11 are disposed in a lateral linear arrangement inside the door of the vehicle, which is described as follows: in order to facilitate the visual clarity of all parts shown in the attached drawings, the automobile door driving mechanism is integrally and vertically arranged in the attached drawings, and the arrangement mode is opposite to the actual installation and layout mode;

the input part I of the gear box 11 adopts an input shaft or an input gear structure, namely when the input part I of the gear box adopts the input shaft, the input shaft of the gear box is connected with the power output shaft of the motor in a positioning way through a coupler; when the input part I of the gear box adopts an input gear, the input gear of the gear box is fixedly sleeved on the power output shaft of the motor; the output shaft of the gear box 11 is provided with a connecting piece 4 with connecting and slipping functions.

Further preferably, the coupling member 4 has a spline housing 40 (internal spline housing structure) for positioning and connecting with the input portion ii of the transmission unit 3, the spline housing 40 is tightly fitted and embedded in the output shaft of the gear box 11, and a friction elastic sheet 41 is further sleeved between the spline housing 40 and the output shaft, which can be specifically shown in fig. 5: an installation groove which extends along the axial direction of the output shaft of the gear box 11 and is opened on one axial end face of the output shaft is arranged on the output shaft of the gear box 11, the spline housing 40 is embedded in the installation groove in a tight fit mode, and the friction elastic sheet 41 is correspondingly sleeved between the installation groove and the spline housing 40. In addition, the principle that the coupling member 4 realizes the coupling and slipping functions is as follows: static friction force exists among the output shaft of the gear box 11, the friction elastic sheet 41 and the spline housing 40, and the static friction force among the output shaft, the friction elastic sheet 41 and the spline housing can be adjusted by adjusting the interference amount of the friction elastic sheet 41; when the gearbox is in normal operation, the power output by the motor can drive the friction elastic sheet 41 and the spline housing 40 to rotate forwards or backwards through the output shaft of the gearbox 11, and when the gearbox is in manual operation, namely the transmission unit 3 drives the output shaft to move backwards, the power output by the transmission unit 3 can drive the output shaft to rotate forwards or backwards through the spline housing 40 and the friction elastic sheet 41, but if the sliding friction force (namely resistance force) between the spline housing 40 and the friction elastic sheet 41 is greater than a set value of static friction force, the spline housing 40 can slip and idle, so that the teeth inside the gearbox are not easily damaged.

In this embodiment, preferably, the transmission unit 3 has a transmission shaft 30, two belt pulleys 31 and a synchronous belt 32, where the transmission shaft 30 is the input portion ii of the transmission unit 3, the transmission shaft 30 is transversely disposed, an axial end of the transmission shaft 30 is positioned and inserted into the spline housing 40, the two belt pulleys 31 are vertically disposed at intervals and respectively sleeved on the other axial end of the transmission shaft 30 and the lead screw nut 21, and the two belt pulleys 31 are further in transmission connection through the synchronous belt 32. In addition, the transmission can be realized by directly adopting a gear set in addition to the synchronous pulley set, which belongs to the conventional technical means well known by the technical personnel in the field, and therefore, the detailed description is not provided herein.

Preferably, the two belt pulleys 31 are respectively defined as a first belt pulley and a second belt pulley, wherein the first belt pulley is positioned and sleeved at the other shaft end of the transmission shaft 30, the second belt pulley is sleeved outside the lead screw nut 21 and can drive the lead screw nut 21 to rotate, and the lead screw nut 21 and the lead screw 20 together can slightly swing relative to the second belt pulley;

in addition, the structure that the second belt pulley is sleeved outside the feed screw nut 21 and can drive the feed screw nut 21 to rotate, and the feed screw nut 21 and the feed screw 20 can slightly swing relative to the second belt pulley is as follows: as shown in fig. 6 and 8, the feed screw nut 21 has a nut body 210 in a spherical ring shape, an internal thread matched with the feed screw 20 is formed on the inner surface of the nut body 210, and two clamping grooves 211 extending along the meridian of the spherical surface of the nut body 210 are symmetrically arranged on the outer surface of the nut body 210; the second belt pulley has two half cylinders 310 that can dock and form a cylinder sleeve barrel structure, and it is shown in fig. 6 to 8, two to see in detail after the half cylinder docks, the supplementary fixed of cementing, two integrated into one piece has a semicircular toothed belt 311 along its circumference extension on the surface of half cylinder 310 respectively, and two semicircular toothed belt 311 can also dock form one with synchronous belt 32 looks drive fit's closed toothed belt ring, two be formed with two card posts 312 on the internal surface of half cylinder 310 relatively, and two the joint that card post 312 corresponds respectively is in two in the draw-in groove 211. In addition, by means of the second belt pulley and the screw nut structure, the following effects are achieved: firstly, the second belt pulley is designed into a split structure, and can be conveniently assembled with the screw rod nut; secondly, the nut body is designed into a spherical ring shape, namely the nut body is similar to a universal joint structure, so that the screw rod can slightly swing relative to the automobile door, and the bad conditions such as blocking, blocking and the like can not occur in the door opening process.

Further preferably, two semicircular toothed belts 311 are respectively formed at the middle positions of the outer surfaces of the two half cylinders 310, and two locking posts 312 are respectively formed at the middle positions of the inner surfaces of the two half cylinders 310.

In this embodiment, preferably, the screw rod 20 is arranged along the transverse direction, and a hemispherical protection head 5 is positioned and connected to an axial end of the screw rod 20, as shown in fig. 2 to 4, and fig. 7 and 8;

the inner surfaces of the two axial ends of the two half cylinders 310 are inclined surfaces 313 formed by extending and inclining outwards, as shown in fig. 2, 4 and 6, the two inclined surfaces 313 located on the same axial side are butted to form an inclined ring surface, and the inclined ring surface facing one axial end of the screw rod 20 can stop and limit the protection head 5; when the car door is opened to the full-open position, the inclined ring surface can stop and limit the protective head, so that the phenomenon that the car door or a metal plate is deformed and damaged due to the fact that the car door is continuously pushed outwards by artificial violence is prevented, and a good car door over-opening protection effect is achieved.

In this embodiment, preferably, the structure that the other shaft end of the screw rod 20 movably penetrates through the rear of the vehicle door and is rotatably connected with the vehicle body is as follows: be equipped with coupling assembling, coupling assembling have a location connect in erection support 60 on the automobile body, a location connect in round pin axle 61 and a activity on the erection support 60 cup joint in the epaxial cover 62 that rotates of round pin 61, just rotate the cover 62 still with another axle head fixed connection of lead screw 20.

In this embodiment, it is preferable that a first housing 71 for accommodating a part of the lead screw 20 and a second housing 72 for accommodating the transmission unit 3 and the lead screw nut 21 are further provided, as shown in fig. 1 and fig. 2, the first housing 71 and the second housing 72 are both made of an aluminum alloy material and are fixedly mounted on an inner wall of a door of an automobile, and the second housing 72 is further connected to the first housing 71 and a housing of the gear box 11 in a positioning manner.

Further preferably, either the first casing 71 or the second casing 72 is fixedly attached to the inner wall of the door of the vehicle through a metal bracket 8. In addition, according to the internal space condition of the vehicle door, the number of the metal brackets can be one or more; the metal bracket and the first shell or the second shell can be fixedly arranged in a rivet connection mode or a bolt connection mode; the relative angle between the metal bracket and the first shell or the second shell can be adjusted, such as: may be relatively parallel to each other or may be angled. In a word, the structure of the metal bracket, the installation mode between the metal bracket and the first shell or the second shell and the like are adjusted, so that the automobile door driving mechanism can be integrally and better adapted to the inner spaces of doors of different automobile types.

To sum up, car door actuating mechanism simple structure, reasonable, operation precision and stability are high, occupy installation space little, low to production technology and the technical requirement on the assembly for car door actuating mechanism changes in the installation and uses.

The above description is only a preferred embodiment of the present invention, but not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as within the protection scope of the present invention.

Claims

1. An automobile door driving mechanism is characterized in that: the power unit (1) is provided with a motor (10) and a gear box (11) which are respectively arranged in the automobile door, and a power output shaft of the motor (10) is connected with a force input part I of the gear box (11) in a positioning way; the execution unit (2) is provided with a screw rod (20) and a screw nut (21) sleeved on the screw rod (20), one shaft end of the screw rod (20) is freely arranged in the automobile door, the other shaft end of the screw rod (20) movably penetrates through the automobile door and is connected with the automobile body in a rotating mode, the screw nut (21) is also arranged in the automobile door, and the screw nut (21) is connected with the output shaft of the gear box (11) through a transmission unit (3) in a transmission mode.

2. The vehicle door drive mechanism according to claim 1, characterized in that: the motor (10) and the gear box (11) are transversely and linearly arranged and positioned and are arranged in the automobile door;

the input part I of the gear box (11) adopts an input shaft or an input gear structure; and a connecting piece (4) with connecting and slipping functions is arranged on the output shaft of the gear box (11).

3. The vehicle door drive mechanism according to claim 2, characterized in that: the connecting piece (4) is provided with a spline sleeve (40) for positioning and connecting with the force input part II of the transmission unit (3), the spline sleeve (40) is embedded in the force output shaft of the gear box (11) in a tight fit mode, and a friction elastic sheet (41) is further sleeved between the spline sleeve (40) and the force output shaft.

4. The vehicle door drive mechanism according to claim 3, characterized in that: the transmission unit (3) is provided with a transmission shaft (30), two belt pulleys (31) and a synchronous belt (32), wherein the transmission shaft (30) is the input part II of the transmission unit (3), the transmission shaft (30) is transversely arranged, one shaft end of the transmission shaft (30) is positioned and inserted into the spline housing (40), the two belt pulleys (31) are vertically arranged at intervals and are respectively sleeved on the other shaft end of the transmission shaft (30) and the screw rod nut (21), and the two belt pulleys (31) are further in transmission connection through the synchronous belt (32).

5. The automobile door drive mechanism according to claim 4, characterized in that: the two belt pulleys (31) are respectively defined as a first belt pulley and a second belt pulley, wherein the first belt pulley is positioned and sleeved on the other shaft end of the transmission shaft (30), the second belt pulley is sleeved outside the screw rod nut (21) and can drive the screw rod nut (21) to rotate, and the screw rod nut (21) and the screw rod (20) can slightly swing relative to the second belt pulley;

in addition, the structure that the second belt pulley is sleeved outside the screw rod nut (21) and can drive the screw rod nut (21) to rotate, and the screw rod nut (21) and the screw rod (20) can slightly swing relative to the second belt pulley is as follows: the lead screw nut (21) is provided with a nut main body (210) in a spherical ring shape, internal threads matched with the lead screw (20) are formed on the inner surface of the nut main body (210), and two clamping grooves (211) extending along the spherical surface meridian of the nut main body (210) are symmetrically arranged on the outer surface of the nut main body (210); the second belt pulley has two half cylinder (310) that can dock and form a cylinder cover barrel structure, two on the surface of half cylinder (310) respectively integrated into one piece have one along its circumference extend semi-circular cingulum (311), and two semi-circular cingulum (311) can also dock form one with synchronous belt (32) looks drive fit's closed cingulum ring, two be formed with two calorie of post (312) on the internal surface of half cylinder (310) relatively, and two the joint that calorie of post (312) corresponds respectively in two in draw-in groove (211).

6. The vehicle door drive mechanism according to claim 5, characterized in that: the two semicircular toothed belts (311) are respectively formed in the middle positions of the outer surfaces of the two half cylinders (310), and the two clamping columns (312) are respectively formed in the middle positions of the inner surfaces of the two half cylinders (310).

7. The vehicle door drive mechanism according to claim 5, characterized in that: the screw rod (20) is transversely arranged, and a hemispherical protection head (5) is positioned and connected to one axial end of the screw rod (20);

the inner surfaces of two shaft ends of the two semi-cylinders (310) are inclined surfaces (313) formed by extending in an outward inclined mode, the two inclined surfaces (313) located on the same shaft side are in butt joint to form an inclined ring surface, and the inclined ring surface facing one shaft end of the screw rod (20) can limit the stop of the protection head (5).

8. The vehicle door drive mechanism according to claim 1, characterized in that: the other shaft end of the screw rod (20) movably penetrates through the rear part of the automobile door and is rotatably connected with the automobile body: be equipped with coupling assembling, coupling assembling have a location connect in erection support (60) on the automobile body, a location connect in round pin axle (61) and a activity on erection support (60) cup joint in rotate cover (62) on round pin axle (61), just rotate cover (62) still with another axle head fixed connection of lead screw (20).

9. The vehicle door drive mechanism according to claim 1, characterized in that: the automobile door lock is characterized by further comprising a first shell (71) used for containing a local part of the screw rod (20) and a second shell (72) used for containing the transmission unit (3) and the screw rod nut (21), wherein the first shell (71) and the second shell (72) are fixedly arranged on the inner wall of an automobile door, and the second shell (72) is further connected with the first shell (71) and a shell of the gear box (11) in a positioning mode.

10. The vehicle door drive mechanism according to claim 9, characterized in that: the first shell (71) and the second shell (72) are selected to be fixedly arranged on the inner wall of the automobile door through a metal bracket (8).