Vehicle door driving mechanism

Abstract

The utility model discloses a car door driving mechanism which comprises a driving assembly, a transmission assembly, a shell and a car body support, the transmission assembly comprises a lead screw, a driving wheel, a transmission sleeve, a transmission nut and a pin shaft, and the driving wheel is provided with a first transmission block and a first installation groove at intervals; the transmission sleeve is provided with a second transmission block and a second mounting groove at intervals, the driving wheel is connected with the transmission sleeve, the transmission nut is arranged in the transmission sleeve, the transmission sleeve is provided with a first penetrating hole, the transmission nut is provided with an axial threaded hole and is in threaded connection with the lead screw through the threaded hole, and the transmission nut is provided with a radial mounting groove. The pin shaft penetrates through the first penetrating hole to be inserted into the mounting groove, the shell is mounted at the position, close to the hinge, of the automobile door, the automobile body support is mounted on an automobile body, the lead screw is rotatably connected with the automobile body support, and the driving assembly drives the driving wheel to rotate so as to drive the lead screw to linearly move, so that the automobile door is driven to be opened or closed. According to the mechanism, the vehicle door can be kept hovering under the limiting working condition, and high safety is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of car door drive, concretely relates to a car door drive mechanism. BACKGROUND

[0002] In the prior art, the car door is usually opened and closed manually, and the conventional mechanical stopper adopts three-gear stop, the manual operation force varies greatly between gears, and the manual force is relatively abrupt when switching between gears, and the hand feeling is poor. Moreover, the conventional mechanical stopper cannot suspend the car door under extreme conditions such as up, down and side slope, and the car door falls, automatically opens, and the risk of collision / impingement accidents easily occurs. When the car door is opened, the car door may collide with external obstacles, damage the car door or cause other accidents. When the car door is closed, the car door may not be closed in place and be in a half-locked state, and the car door is easy to open during driving, causing accidents and affecting safety; the hands and feet of people are clamped, causing personal accidents.

[0003] Although there are electric car door structures now, most of them adopt pull lock / rack / hinge shaft / parallel shaft type structures, and have the defects of more parts, complex structure, loud noise, high cost and the like, or cannot realize up / down / side slope suspension and the like. In addition, due to the limited space of the car door, most of the existing electric car door structures cannot be installed. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems existing in the prior art, provides a car door drive mechanism, and can effectively keep the car door suspended under extreme conditions such as up, down and side slope, and has high safety.

[0005] In order to solve the above problems, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of vehicle door driving mechanism, including drive assembly, transmission assembly, shell and car body support, the transmission assembly is arranged in shell, it includes screw rod, drive wheel, transmission sleeve, transmission nut, pin shaft, the output end of the drive assembly is connected with the drive wheel, the inner surface of the drive wheel is spaced and provided with a plurality of first transmission blocks, and the first installation groove is between two adjacent first transmission blocks;The outer surface of the transmission sleeve is spaced and provided with a plurality of second transmission blocks, and the second installation groove is between two adjacent second transmission blocks, the connection of drive wheel and transmission sleeve is realized by the cooperation of first installation groove and second transmission block and the cooperation of second installation groove and first transmission block, the transmission nut is spherical, it is arranged in the transmission sleeve, at least one second transmission block of the transmission sleeve is provided with the first perforation along the radial direction of transmission sleeve, the transmission nut is provided with axial thread hole, and is threadedly connected with the screw rod by the thread hole, the transmission nut is provided with radial installation recess, the pin shaft passes through the first perforation and is inserted into the installation recess, the shell is installed on the door, and is located close to the position of door hinge, the car body support is installed on the car body, and the screw rod is rotatably connected with the car body support, the drive assembly drives drive wheel to rotate, to drive transmission sleeve and transmission nut to rotate, to drive the screw rod to move linearly, to drive the door to open or close.

[0007] Preferably, the shell includes an intermediate shell, a tail pipe and a mounting seat, the intermediate shell is provided with a first opening and a second opening on both sides along the axial direction of the screw rod, the tail pipe is connected with the first opening side of the intermediate shell, and the mounting seat is connected with the second opening side of the intermediate shell, the first end of the screw rod is located in the tail pipe, the second end of the screw rod extends to the outside after sequentially passing through the intermediate shell and the mounting seat, and the intermediate shell is further provided with a third opening, and the output end of the drive assembly extends into the internal cavity of the intermediate shell from the third opening.

[0008] Preferably, the worm gear is arranged in the internal cavity of the intermediate shell, and the output end of the drive assembly is provided with a worm, and the worm is engaged with the worm gear.

[0009] Preferably, the vehicle door driving mechanism further includes a positioning assembly, the positioning assembly includes a first positioning bearing, the end of the transmission sleeve is provided with a flange, the first positioning bearing is sleeved on the transmission sleeve, and the inner ring of the first positioning bearing is abutted with the second transmission block and the flange on both sides.

[0010] Preferably, the positioning assembly further comprises a threaded pipe, an outer surface of the threaded pipe is provided with external threads, an inner surface of the second opening of the intermediate housing is further provided with a threaded portion, the threaded portion is provided with internal threads, the threaded pipe is connected with the threaded portion through threads, and the intermediate housing is provided with a first positioning step, an outer ring of the first positioning bearing is clamped on one side of the first positioning step and is pressed by the threaded pipe on the other side.

[0011] Preferably, the positioning assembly further comprises a second positioning bearing, the intermediate housing is internally provided with a second positioning step, one side of the second positioning bearing is clamped on the second positioning step, and the other side is abutted with one end of the second positioning block away from the first positioning bearing.

[0012] Preferably, a first end of the lead screw is provided with a lead screw gasket and a locking nut, the lead screw gasket is sleeved on the lead screw, the locking nut is located outside the lead screw gasket and is used for fixing the lead screw gasket, and a diameter of the lead screw gasket is greater than that of an inner hole of the transmission nut.

[0013] Preferably, a second end of the lead screw is provided with a lead screw adapter, the lead screw adapter is provided with a first connecting hole, the vehicle body support is provided with a second connecting hole, the first connecting hole is aligned with the second connecting hole, and the first connecting hole and the second connecting hole are connected through a pin rivet.

[0014] Preferably, the door driving mechanism further comprises a sealing assembly, the sealing assembly comprises a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring is arranged between a connecting surface of the intermediate housing and the tail pipe, the second sealing ring is arranged between a connecting surface of the intermediate housing and the mounting seat, and the third sealing ring is arranged between a connecting surface of the intermediate housing and the driving motor.

[0015] Preferably, the sealing assembly further comprises a bellows, the bellows is sleeved on the lead screw along an axial direction of the lead screw, a second end of the lead screw is provided with a bellows groove, one end of the bellows is arranged in the bellows groove, and the other end of the bellows is pressed between the mounting seat and the intermediate housing.

[0016] The door driving mechanism in the utility model adopts the transmission mode of the lead screw nut, can effectively realize full-condition door hovering, and even in the limit condition such as up / down / side slope, the door will not appear automatic falling, automatic opening and the like. The cooperation of the mounting groove on the transmission nut and the pin shaft can realize the swing of the lead screw in multiple directions in the process of linear motion, ensure that the rotation axis of the vehicle body support and the rotation axis of the door hinge always remain parallel, realize the adjustment of the lead screw, and avoid the jamming of the door when opening and closing the door.

[0017] In addition, the screw-nut structure has no change in manual operation force between gears, and the manual force is light compared with the mechanical stopper. Moreover, compared with the pull lock / rack / hinge shaft / parallel shaft structure, the screw-nut structure has the advantages of simple structure, few parts, low noise and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structure schematic view of the door driving mechanism in the embodiment 1 of the utility model;

[0019] Figure 2 is the first cross sectional view of the door driving mechanism in the embodiment 1 of the utility model;

[0020] Figure 3 is the second cross sectional view of the door driving mechanism in the embodiment 1 of the utility model;

[0021] Figure 4 is the explosion view of the first kind of implementation mode of the driving wheel, transmission sleeve, transmission nut and pin shaft in the embodiment 1 of the utility model;

[0022] Figure 5 is the explosion view of the second kind of implementation mode of the driving wheel, transmission sleeve, transmission nut and pin shaft in the embodiment 1 of the utility model;

[0023] Figure 6 is the structure schematic view of the first kind of implementation mode of the transmission sleeve in the embodiment 1 of the utility model;

[0024] Figure 7 is the structure schematic view of the second kind of implementation mode of the transmission sleeve in the embodiment 1 of the utility model;

[0025] Figure 8 is Figure 2 the local enlarged view;

[0026] Figure 9 is the three-dimensional structure schematic view of the intermediate shell in the embodiment 1 of the utility model;

[0027] Figure 10 is the connection schematic view of the transmission nut and screw rod in the embodiment 1 of the utility model.

[0028] In the diagram: 100-lead screw, 110-transmission sleeve, 111-second transmission block, 112-second mounting groove, 113-first through hole, 114-flanged edge, 120-transmission nut, 121-threaded hole, 122-mounting groove, 130-pin, 140-drive wheel, 141-first transmission block, 142-first mounting groove, 150-worm gear, 160-body bracket, 170-locking nut, 171-lead screw washer, 180-lead screw adapter, 181-bulb, 1 82-Pin rivet, 200-Intermediate housing, 210-Tail end protector, 220-Mounting base, 230-First opening, 240-Second opening, 250-Third opening, 260-Drive assembly, 300-First positioning bearing, 310-First positioning step, 320-Threaded pipe, 330-Second positioning step, 340-Second positioning bearing, 400-First sealing ring, 410-Second sealing ring, 420-Third sealing ring, 500-Bellwall, 510-Bellwall groove. Detailed Implementation

[0029] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "above" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] This utility model provides a vehicle door drive mechanism, including a drive assembly, a transmission assembly, a housing, and a vehicle body bracket. The transmission assembly is disposed within the housing and includes a lead screw, a drive wheel, a transmission sleeve, a transmission nut, and a pin. The output end of the drive assembly is connected to the drive wheel. The inner surface of the drive wheel is provided with multiple first transmission blocks spaced apart, with a first mounting groove between two adjacent first transmission blocks. The outer surface of the transmission sleeve is provided with multiple second transmission blocks spaced apart, with a second mounting groove between two adjacent second transmission blocks. The connection between the drive wheel and the transmission sleeve is achieved through the cooperation of the first mounting groove with the second transmission blocks and the cooperation of the second mounting groove with the first transmission blocks. The transmission nut is spherical. The transmission sleeve is located inside the transmission sleeve. At least one of the second transmission blocks of the transmission sleeve has a first through hole along the radial direction of the transmission sleeve. The transmission nut has an axial threaded hole and is threadedly connected to the lead screw through the threaded hole. The transmission nut has a radial mounting groove. The pin passes through the first through hole and is inserted into the mounting groove. The housing is mounted on the car door and is located near the car door hinge. The body bracket is mounted on the car body, and the lead screw is rotatably connected to the body bracket. The drive assembly drives the drive wheel to rotate, thereby driving the transmission sleeve and transmission nut to rotate, and then driving the lead screw to make linear motion to drive the car door to open or close.

[0034] Example 1

[0035] like Figures 1-10 As shown, this embodiment discloses a vehicle door drive mechanism, including a drive assembly 260, a transmission assembly, a housing, and a vehicle body bracket 160. The transmission assembly is disposed within the housing and includes a lead screw 100, a drive wheel 140, a transmission sleeve 110, a transmission nut 120, and a pin 130. The drive assembly 260 employs a drive motor, the output end of which is connected to the drive wheel 140 to drive the drive wheel 140 to rotate. In this embodiment, the drive wheel 140 is a worm gear.

[0036] like Figure 4 As shown, further, the inner surface of the drive wheel 140 is provided with a plurality of first transmission blocks 141 spaced apart, and a first mounting groove 142 is formed between two adjacent first transmission blocks 141. The outer surface of the transmission sleeve 110 is provided with a plurality of second transmission blocks 111 spaced apart, and a second mounting groove 112 is formed between two adjacent second transmission blocks 111. The connection between the drive wheel 140 and the transmission sleeve 110 is achieved through the cooperation of the first mounting groove 142 with the second mounting block and the cooperation of the second mounting groove 112 with the first mounting block (the first transmission block 141 is inserted into the corresponding second mounting groove 112, and the second transmission block 111 is inserted into the corresponding first mounting groove 142).

[0037] The transmission nut 120 is spherical and is located inside the transmission sleeve 110. The interior of the transmission sleeve 110 is spherical and recessed. At least one second mounting block of the transmission sleeve 110 has a first through hole 113 along the radial direction of the transmission sleeve 110.

[0038] like Figure 4 As shown, in this embodiment, the transmission sleeve 110 is provided with two first through holes 113, which are disposed on two second transmission blocks 111 symmetrical about their central axes. The transmission nut 120 is provided with an axially penetrating threaded hole 121, and is threadedly connected to the lead screw 100 through the threaded hole 121. The transmission nut 120 is provided with two radial mounting grooves 122, which are symmetrically disposed on the side wall of the transmission nut 120, and the axes of the two mounting grooves 122 are perpendicular to the axis of the threaded hole 121.

[0039] like Figure 10 As shown, there are two corresponding pins 130. The two pins 130 pass through the two first through holes 113 respectively and are inserted into the mounting grooves 122 on both sides of the transmission nut 120.

[0040] like Figure 1 , 2 As shown, the housing is installed on the car door and located near the door hinge. The body bracket 160 is installed on the car body, and the lead screw 100 is rotatably connected to the body bracket 160. The drive assembly 260 drives the drive wheel 140 to rotate, thereby driving the transmission sleeve 110 and the transmission nut 120 to rotate, which in turn drives the lead screw 100 to make linear motion, so as to drive the car door to open or close.

[0041] like Figure 2 As shown, the drive assembly 260 drives the worm wheel to rotate through the worm 150, thereby driving the transmission sleeve 110 and the transmission nut 120 to rotate. Since the transmission nut 120 is threadedly connected to the lead screw 100, it drives the lead screw 100 to make linear motion.

[0042] When the car door is opened, the drive assembly 260 drives the lead screw 100 to move linearly to the right, thereby increasing the length of the lead screw 100 between the housing and the body bracket 160, thus pushing the car door outward. Since the car door rotates around its hinge with the body, during the opening process, the lead screw 100 and the body bracket 160 will rotate around their connection point.

[0043] The traditional screw nut structure cannot swing, and due to the installation deviation between the door and the door driving mechanism, the rotation axis of the rotation point of the screw rod 100 and the vehicle body support 160 cannot keep parallel with the axis of the door hinge, thereby causing the door to be stuck during opening and closing, and further unable to normally open and close the door.

[0044] As shown in Figure 10 The transmission nut 120 is threadedly connected to the screw rod 100 through the threaded hole 121, and the upper and lower sides thereof are provided with oval-shaped mounting grooves 122. When the transmission nut 120 rotates, it will drive the screw rod 100 to move linearly along the axis direction of the threaded hole 121. Due to the structural design of the pin shaft 130 and the mounting groove 122, when the screw rod 100 moves linearly, the screw rod 100 and the transmission nut 120 can synchronously rotate in two directions, the first direction is to rotate a certain angle with the central axis of the pin shaft 130 as the center (swing in the horizontal plane), and the other direction is to rotate along the length direction of the mounting groove 122 (swing in the vertical plane), that is, the pin shaft 130 moves from one side of the mounting groove 122 to the other side. Such a structural design enables the screw rod 100 to swing a certain angle, while the external pin shaft 130, the transmission sleeve 110 and the driving wheel 140 do not swing, thereby playing a role of aligning the screw rod 100, so that the screw rod 100 swings with the opening and closing of the door. When there is a certain installation deviation between the door and the door driving mechanism, the installation deviation can be eliminated by the swing of the screw rod, so as to keep the rotation axis of the rotation point of the screw rod 100 and the vehicle body support 160 parallel with the axis of the door hinge, thereby ensuring that the door can be smoothly opened and closed. Such a structure is conducive to reducing the installation precision requirements of the door driving mechanism, the door and the vehicle body. When there is a certain installation deviation, the door can also be smoothly opened and closed.

[0045] In addition, the pin shaft 130 also has the function of transmitting torque, so that the driving wheel 140 can drive the transmission nut 120 to rotate.

[0046] As shown in Figure 9 The housing includes an intermediate housing 200, a tail protective tube 210 and a mounting seat 220. The first and second openings 230 and 240 are respectively arranged on the two sides of the intermediate housing 200 along the axial direction of the screw rod 100, the tail protective tube 210 is connected to the first opening 230 side of the intermediate housing 200, the mounting seat 220 is connected to the second opening 240 side of the intermediate housing 200, the first end of the screw rod 100 is located in the tail protective tube 210, the second end of the screw rod 100 extends to the outside after sequentially passing through the intermediate housing 200 and the mounting seat 220, and the intermediate housing 200 is further provided with a third opening 250. The third opening 250 is located on the side wall of the intermediate housing 200, and the output end of the driving motor extends into the internal cavity of the intermediate housing 200 from the third opening 250.

[0047] As Figure 3 shown, the worm gear is arranged in the inner cavity of the intermediate housing 200, the output end of the driving motor is provided with the worm 150, and the worm 150 is engaged with the worm gear.

[0048] As Figure 2 , 4 , 8 shown, the door driving mechanism further comprises a positioning assembly, the positioning assembly comprises a first positioning bearing 300, the end of the transmission sleeve 110 is provided with a flange 114, the first positioning bearing 300 is sleeved on the transmission sleeve 110, and the two sides of the inner ring of the first positioning bearing 300 are respectively abutted with the second transmission block 111 and the flange 114, so as to be limited between the second transmission block 111 and the flange 114.

[0049] As Figure 8 shown, further, the positioning assembly further comprises a threaded pipe 320, the outer surface of the threaded pipe 320 is provided with external threads, the inner surface of the second opening 240 of the intermediate housing 200 is further provided with a threaded portion, the threaded portion is provided with internal threads, the threaded pipe 320 is connected with the threaded portion through threads, and the intermediate housing 200 is provided with a first positioning step 310, one side of the outer ring of the first positioning bearing 300 is clamped on the first positioning step 310, and the other side is pressed by the threaded pipe 320, that is, the first positioning bearing 300 is limited by the first positioning step 310 and the threaded pipe 320, so as to fix the first positioning bearing 300 in the intermediate housing 200, and then limit the positioning sleeve through the first positioning bearing 300.

[0050] As Figure 8 shown, the positioning assembly further comprises a second positioning bearing 340, the second positioning bearing 340 is located on one side of the intermediate housing 200 close to the tail pipe 210, the intermediate housing 200 is provided with a second positioning step 330, one side of the second positioning bearing 340 is clamped on the second positioning step 330, and the other side is abutted with one end of the second positioning block away from the first positioning bearing 300, that is, the second positioning bearing 340 is limited by the second positioning step 330 and the second positioning block, so as to play an auxiliary positioning role on the transmission sleeve 110.

[0051] In the embodiment, the first positioning bearing 300 and the second positioning bearing 340 limit the positioning sleeve to a fixed position in the intermediate housing 200, and the positioning sleeve can only rotate with the driving wheel 140, but cannot move linearly. And the two ends of the worm gear are respectively abutted with the first positioning bearing 300 and the second positioning bearing 340.

[0052] In the embodiment, the first through hole 113 and the number of the pin shaft 130 are two, two through holes are respectively arranged on two second transmission blocks 111 which are symmetrical along the central axis of the transmission sleeve 110, and two installation grooves 122 are arranged on the upper part of the transmission nut 120 inside the transmission sleeve 110, the two installation grooves 122 are respectively aligned with the two first through holes 113, the pin shaft 130 is inserted from the first through hole 113 outside the transmission sleeve 110, the head end is inserted into the installation groove 122 of the transmission nut 120, the tail end is flush with the outer surface of the second transmission block 111, and the inner surface of the first installation groove 142 of the driving wheel 140 is abutted, the driving wheel 140 is pressed tightly, so that the pin shaft 130 cannot move along the diameter direction of the driving wheel 140.

[0053] As shown in Figure 4 , the two end faces of the threaded hole 121 of the transmission nut 120 are flat, the other parts of the outer surface of the transmission nut 120 are spherical, the shape of the installation groove 122 is oval, and the width of the installation groove 122 is matched with the diameter of the pin shaft 130, so that the pin shaft 130 can be clamped in the installation groove 122, and the lower end of the pin shaft 130 does not contact the lead screw 100.

[0054] As shown in Figure 4 , the inside of the transmission sleeve 110 is spherical, the openings on both sides of the transmission sleeve 110 are inwardly tapered structures, and the diameter of the opening is smaller than the maximum diameter of the transmission nut 120, so that the transmission nut 120 is always located inside the transmission sleeve 110 and cannot be taken out of the transmission sleeve 110.

[0055] As shown in Figure 5 , as another embodiment, the two side faces of the opening on one side of the transmission sleeve 110 are flat structures matched with the two end faces of the threaded hole 121 of the transmission nut 120, and the other parts are spherical structures matched with the spherical surface of the transmission nut 120. When the transmission nut 120 is rotated to a certain angle, the shape of the opening of the transmission sleeve 110 is matched with the shape of the transmission thread, so that the transmission nut 120 is put into the transmission sleeve 110 from the opening of the transmission sleeve 110, and then the transmission nut 120 is rotated to the position where the installation groove 122 is aligned with the first through hole 113 on the transmission sleeve 110, and then the pin shaft 130 is inserted. At this time, the transmission nut 120 cannot fall out of the opening of the transmission sleeve 110.

[0056] As shown in Figure 2 , the diameters of the first end and the second end of the lead screw 100 are smaller than the diameter of the middle segment of the lead screw 100, so that the two ends form a stepped structure.

[0057] The first end of the lead screw 100 is provided with a lead screw washer 171 and a locking nut 170. The lead screw washer 171 is sleeved on the first end of the lead screw 100, and the locking nut 170 is located outside the lead screw washer 171 and is used to fix the lead screw washer 171. The diameter of the lead screw washer 171 is greater than the diameter of the inner hole of the transmission nut 120. When the lead screw 100 moves to the right to the position where the lead screw washer 171 contacts the threaded hole 121 of the transmission nut 120, the lead screw 100 reaches the maximum movement distance, and the door is in the limit opening position because the lead screw washer 171 cannot pass through the threaded hole 121.

[0058] Further, the second end of the lead screw 100 is provided with a lead screw adapter 180. One end of the lead screw adapter 180 is threadedly connected with the second end of the lead screw 100, and the other end is provided with a first connecting hole. The vehicle body support 160 is provided with a second connecting hole. The first connecting hole is aligned with the second connecting hole and is connected through a pin rivet 182. When the door is opened or closed, the lead screw 100 and the vehicle body support 160 rotate around the pin rivet 182 as the rotation center.

[0059] Further, the first connecting hole is further provided with a bushing 181.

[0060] As shown in Figure 2 , 3 , 8, optionally, the door driving mechanism further comprises a sealing assembly. The sealing assembly comprises a first sealing ring 400, a second sealing ring 410, and a third sealing ring 420. The first sealing ring 400 is arranged between the connecting surface of the intermediate housing 200 and the tail pipe 210. The second sealing ring 410 is arranged between the connecting surface of the intermediate housing 200 and the mounting seat 220. The third sealing ring 420 is arranged between the connecting surface of the intermediate housing 200 and the driving motor. The sealing assembly is used to increase the sealing performance of the door driving mechanism.

[0061] As shown in Figure 2 , 8 , further, the sealing assembly further comprises a bellows 500. The bellows 500 is sleeved on the lead screw 100 along the axial direction of the lead screw 100. The second end of the lead screw 100 is provided with a bellows groove 510. One end of the bellows 500 is installed in the bellows groove 510, and the other end is pressed between the mounting seat 220 and the intermediate housing 200, so as to further increase the sealing performance of the door driving mechanism.

[0062] The driving mechanism of the vehicle door adopts the transmission mode of the screw rod and the nut, can effectively realize the full working condition vehicle door hovering, even in the limit working condition of up / down / side slope, the vehicle door will not appear the conditions of automatic falling, automatic opening and the like. The cooperation of the mounting groove 122 on the transmission nut 120 and the pin shaft 130 can realize the swing of the screw rod 100 in multiple directions in the process of linear motion, ensure that the rotation axis of the vehicle body support 160 and the rotation axis of the vehicle door hinge always keep parallel, realize the alignment of the screw rod 100, avoid the vehicle door to appear the stuck in the opening and closing of the door. In addition, compared with the mechanical type limiter of the transmission, the screw rod and the nut structure does not have the manual operation force change in the gear interval switching, the manual force is light. And, compared with the pull lock / rack / hinge shaft / parallel shaft type structure and the like, the screw rod and the nut structure has the advantages of simple structure, few parts, small noise and low cost.

[0063] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the utility model, and the utility model is not limited to this. For ordinary skilled persons in the art, various modifications and improvements can be made without departing from the spirit and essence of the utility model, and these modifications and improvements are also regarded as the protection scope of the utility model.

Claims

1. A door drive mechanism, characterized by, The drive assembly (260), the transmission assembly, the shell and the vehicle body support (160), The transmission assembly is arranged in the shell and comprises a lead screw (100), a drive wheel (140), a transmission sleeve (110), a transmission nut (120) and a pin shaft (130), The output end of the drive assembly (260) is connected with the drive wheel (140), the inner surface of the drive wheel (140) is provided with a plurality of first transmission blocks (141) at intervals, and the first transmission blocks (141) are first installation grooves (142) between adjacent two first transmission blocks (141); the outer surface of the transmission sleeve (110) is provided with a plurality of second transmission blocks (111) at intervals, and the second transmission blocks (111) are second installation grooves (112) between adjacent two second transmission blocks (111), the connection between the drive wheel (140) and the transmission sleeve (110) is realized through the cooperation of the first installation grooves (142) and the second transmission blocks (111) and the cooperation of the second installation grooves (112) and the first transmission blocks (141), and the transmission nut (120) is spherical and arranged inside the transmission sleeve (110), At least one of the second transmission blocks (111) of the transmission sleeve (110) is provided with a first perforation (113) along the radial direction of the transmission sleeve (110), the transmission nut (120) is provided with an axial threaded hole (121), and the lead screw (100) is threadedly connected with the threaded hole (121), the transmission nut (120) is provided with a radial installation groove (122), the pin shaft (130) passes through the first perforation (113) and is inserted into the installation groove (122), The shell is mounted on the vehicle door and located close to the vehicle door hinge, the vehicle body support (160) is mounted on the vehicle body, and the lead screw (100) is rotatably connected with the vehicle body support (160), the drive assembly (260) drives the drive wheel (140) to rotate, thereby driving the transmission sleeve (110) and the transmission nut (120) to rotate, and further driving the lead screw (100) to move linearly, so as to drive the vehicle door to open or close.

2. The vehicle door drive mechanism of claim 1, wherein, The shell comprises an intermediate shell (200), a tail pipe (210) and a mounting seat (220), The first end of the lead screw (100) is located in the tail pipe (210), and the second end of the lead screw (100) extends to the outside after sequentially passing through the intermediate shell (200) and the mounting seat (220), The intermediate shell (200) is further provided with a third opening (250), and the output end of the drive assembly (260) extends into the internal cavity of the intermediate shell (200) from the third opening (250).

3. The vehicle door drive mechanism of claim 2, wherein, The driving wheel (140) is arranged in the internal cavity of the intermediate shell (200), and a worm (150) is arranged on the output end of the driving assembly (260), and the worm (150) is engaged with the driving wheel (140).

4. The vehicle door drive mechanism of claim 3, wherein, Further comprising a positioning assembly, the positioning assembly comprises a first positioning bearing (300), an end of the transmission sleeve (110) is provided with a flange (114), the first positioning bearing (300) is sleeved on the transmission sleeve (110), and the two sides of the inner ring of the first positioning bearing (300) are respectively abutted with the second transmission block (111) and the flange (114).

5. The vehicle door drive mechanism of claim 4, wherein, The positioning assembly further comprises a threaded pipe (320), the outer surface of the threaded pipe (320) is provided with external threads, The inner surface of the second opening (240) of the intermediate shell (200) is further provided with a threaded portion, the threaded portion is provided with internal threads, the threaded pipe (320) is connected with the threaded portion through threads, And the intermediate shell (200) is provided with a first positioning step (310), one side of the outer ring of the first positioning bearing (300) is clamped on the first positioning step (310), and the other side is pressed by the threaded pipe (320).

6. The vehicle door drive mechanism of claim 5, wherein, The positioning assembly further comprises a second positioning bearing (340), The intermediate shell (200) is provided with a second positioning step (330), one side of the second positioning bearing (340) is clamped on the second positioning step (330), and the other side is abutted with one end of the second transmission block (111) away from the first positioning bearing (300).

7. The vehicle door drive mechanism of claim 2, wherein, The first end of the lead screw (100) is provided with a lead screw gasket (171) and a locking nut (170), the lead screw gasket (171) is sleeved on the lead screw (100), and the locking nut (170) is located outside the lead screw gasket (171) and is used for fixing the lead screw gasket (171), The diameter of the lead screw gasket (171) is greater than the diameter of the inner hole of the transmission nut (120).

8. The vehicle door drive mechanism of claim 2, wherein, The second end of the lead screw (100) is provided with a lead screw adapter (180), the lead screw adapter (180) is provided with a first connecting hole, the vehicle body support (160) is provided with a second connecting hole, the first connecting hole is aligned with the second connecting hole, and the first connecting hole is connected through a pin shaft rivet (182).

9. The vehicle door drive mechanism of claim 2, wherein, Further comprising a sealing assembly, the sealing assembly comprises a first sealing ring (400), a second sealing ring (410) and a third sealing ring (420), the first sealing ring (400) is arranged between the connecting surface of the intermediate shell (200) and the tail protection pipe (210), the second sealing ring (410) is arranged between the connecting surface of the intermediate shell (200) and the mounting seat (220), and the third sealing ring (420) is arranged between the connecting surface of the intermediate shell (200) and the driving assembly (260).

10. The vehicle door drive mechanism of claim 9, wherein, The sealing assembly further comprises a bellows (500) sleeved on the lead screw (100) along the axial direction of the lead screw (100), and a second end of the lead screw (100) is provided with a bellows groove (510), one end of the bellows (500) is installed in the bellows groove (510), and the other end is pressed between the mounting seat (220) and the intermediate housing (200).

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