Transmission assembly of vehicle door driving mechanism

Abstract

The utility model discloses a transmission assembly of a vehicle door driving mechanism, which comprises a driving wheel, a transmission sleeve, a spherical nut, pin shafts and a screw rod, the driving wheel is connected with the transmission sleeve, the side wall of the transmission sleeve is at least provided with a pair of through holes which are symmetrical along the central axis of the transmission sleeve, the number of the pin shafts is the same as that of the through holes, and the screw rod is connected with the spherical nut. The spherical nut is installed in the transmission sleeve, a through inner hole is formed in the spherical nut, an internal thread is arranged in the inner hole, the spherical nut is in threaded connection with the lead screw through the inner hole, groove holes are further formed in the side wall of the spherical nut, the number of the groove holes is the same as that of the pin shafts, and the pin shafts are arranged in the groove holes. The pin shaft is sequentially inserted into the penetrating hole and the groove hole, the driving wheel rotates so as to drive the transmission sleeve and the spherical nut to rotate, and then the lead screw is driven to do linear motion. According to the transmission assembly, swing of the lead screw nut is achieved, automatic aligning can be achieved, and the precision needed by installation of the vehicle door is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of transmission mechanisms, specifically relating to a transmission component for a car door drive mechanism. Background Technology

[0002] Currently, most car door drive mechanisms on the market are swing structures, which occupy a lot of space. Due to the small interior space of car doors, most car door interiors cannot be equipped with such mechanisms. At the same time, the left and right swinging can easily cause impacts on important components such as sheet metal and glass inside the car door, resulting in damage to the car.

[0003] In addition, there are combinations of drive mechanism + push rod structure on the market that fix the envelope space, but these will increase the cost of components such as push rod, lead screw and nut.

[0004] Secondly, there is another type of parallel drive mechanism on the market, which has a small installation space, but the reducer structure is complex and the cost is high. At the same time, it is noisier and affects the user experience.

[0005] The screw and nut structure, lacking a swing mechanism design, is prone to causing the drive mechanism to jam when the door deviates significantly, preventing the door from opening and closing electrically and thus making it unsuitable for use in door drive mechanisms. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the above-mentioned deficiencies in the prior art by providing a transmission component for a car door drive mechanism. The transmission component of the car door drive mechanism realizes the swing of the lead screw nut and can automatically align itself, thereby reducing the precision required for the installation of the car door.

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A transmission assembly for a car door drive mechanism includes a drive wheel, a transmission sleeve, a spherical nut, a pin, and a lead screw. The inner surface of the drive wheel has a first connecting portion, and the outer surface of the transmission sleeve has a second connecting portion. The second connecting portion cooperates with the first connecting portion to connect the transmission sleeve to the drive wheel. At least one pair of through holes symmetrically arranged along the central axis of the transmission sleeve are provided on the side wall of the transmission sleeve. The number of pins is the same as the number of through holes. The spherical nut is installed inside the transmission sleeve and has a through inner hole with an internal thread. The spherical nut is threaded to the lead screw through the inner hole. The side wall of the spherical nut also has groove holes, the number of which is the same as the number of pins. The pins are inserted into the through holes and the groove holes in sequence. The drive wheel rotates, thereby driving the transmission sleeve and the spherical nut to rotate, which in turn drives the lead screw to move linearly. The drive wheel, the transmission sleeve, and the pins always maintain the same state of motion.

[0009] Preferably, the first connecting part consists of a plurality of first protrusions spaced apart on the inner surface of the drive wheel, with a first groove between two adjacent first protrusions; the second connecting part consists of a plurality of second protrusions spaced apart on the outer surface of the connecting sleeve, with a second groove between two adjacent second protrusions; and the first protrusions are adapted to the second grooves, and the second protrusions are adapted to the first grooves.

[0010] Preferably, the number of the second protrusions is even, and the corresponding two second protrusions are symmetrical along the central axis of the transmission sleeve.

[0011] Preferably, the perforation is formed on the second protrusion.

[0012] Preferably, the two end faces of the inner hole of the spherical nut are flat.

[0013] Preferably, the groove hole is elliptical in shape.

[0014] Preferably, the interior of the transmission sleeve has a ball-and-socket structure, and the size of the openings at both ends is smaller than the size of the spherical nut.

[0015] Preferably, the two inner sides of one opening of the transmission sleeve are planar structures adapted to the two end faces of the inner hole of the spherical nut, and the remaining part is a spherical structure adapted to the spherical surface of the spherical nut.

[0016] The transmission component of the door drive mechanism in this invention utilizes a recessed hole in the nut into which a pin is inserted. Firstly, the pin transmits torque. The rotation of the drive wheel causes the transmission sleeve and the spherical nut to rotate together, thereby pushing the lead screw in linear motion. Furthermore, the spherical nut and the lead screw can oscillate in two directions along the axis of the pin and the length of the recessed hole. Since the drive wheel and the pin remain stationary while the lead screw and spherical nut oscillate, this design effectively aligns the pin. This structural design enables the lead screw to oscillate. Even if there are certain precision deviations during the installation of the door drive mechanism, the oscillation of the lead screw can eliminate these deviations, preventing jamming when the door opens and closes. Moreover, the structure of the lead screw and spherical nut reduces space requirements, making it suitable for applications in confined spaces such as car doors. Attached Figure Description

[0017] Figure 1 This is an exploded view of the transmission component of the door drive mechanism in Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the lead screw, ball nut, and pin in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the spherical nut in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the transmission sleeve in Embodiment 1 of this utility model;

[0021] Figure 5 This is a schematic diagram of the transmission sleeve in Embodiment 2 of this utility model;

[0022] Figure 6 This is a schematic diagram of the installation of the lead screw nut in Embodiment 2 of this utility model.

[0023] In the diagram: 100-drive wheel, 110-first protrusion, 120-first groove, 200-transmission sleeve, 210-second protrusion, 220-second groove, 230-through hole, 300-pin, 400-spherical nut, 410-inner hole, 420-groove hole, 500-lead screw. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] This utility model provides a transmission component for a car door drive mechanism, including a drive wheel, a transmission sleeve, a spherical nut, a pin, and a lead screw. The inner surface of the drive wheel has a first connecting portion, and the outer surface of the transmission sleeve has a second connecting portion. The second connecting portion cooperates with the first connecting portion to connect the transmission sleeve to the drive wheel. The side wall of the transmission sleeve has at least one pair of through holes symmetrically arranged along the central axis of the transmission sleeve. The number of pins is the same as the number of through holes. The spherical nut is installed inside the transmission sleeve and has a through inner hole with an internal thread. The spherical nut is threaded to the lead screw through the inner hole. The side wall of the spherical nut also has groove holes, the number of which is the same as the number of pins. The pins are inserted into the through holes and the groove holes in sequence. The drive wheel rotates, thereby driving the transmission sleeve and the spherical nut to rotate, which in turn drives the lead screw to move linearly. The drive wheel, the transmission sleeve, and the pins always maintain the same state of motion.

[0029] Example 1

[0030] like Figure 1-4 As shown, this embodiment discloses a transmission assembly for a car door drive mechanism, including a drive wheel 100, a transmission sleeve 200, a ball nut 400, a pin 300, and a lead screw 500. The inner surface of the drive wheel 100 is provided with a first connecting portion, and the outer surface of the transmission sleeve 200 is provided with a second connecting portion. The second connecting portion cooperates with the first connecting portion to connect the transmission sleeve 200 to the drive wheel 100. At least one pair of through holes 230 symmetrically arranged along the central axis of the transmission sleeve 200 are provided on the side wall of the transmission sleeve 200. The number of pins 300 is the same as the number of through holes 230.

[0031] Furthermore, a spherical nut 400 is installed inside the transmission sleeve 200. The spherical nut 400 has a through inner hole 410 with internal threads. The drive wheel 100, the transmission sleeve 200, and the inner hole 410 of the spherical nut 400 are on the same central axis. The lead screw 500 has external threads, and the spherical nut 400 is threadedly connected to the lead screw 500 through the inner hole 410. The side wall of the spherical nut 400 (the spherical surface perpendicular to the end face of the inner hole 410) also has recessed holes 420. The number of recessed holes 420 is the same as the number of pins 300. The pins 300 are inserted into the through hole 230 and the recessed holes 420 in sequence. The drive wheel 100 rotates, thereby driving the transmission sleeve 200 and the spherical nut 400 to rotate, which in turn drives the lead screw 500 to move linearly. The lead screw 500 moves forward or backward to open or close the car door.

[0032] In this embodiment, the drive wheel 100, the transmission sleeve 200, and the pin 300 always maintain the same state of motion. Since the drive wheel is fixed to the drive assembly, the transmission sleeve is connected to the drive wheel via a first connecting part and a second connecting part, and the pin passes through a through hole on the transmission sleeve and is inserted into a groove hole on the spherical nut. Therefore, when the lead screw swings, it will cause the spherical nut to swing, while the transmission sleeve and pin are limited and will not swing with the lead screw.

[0033] like Figure 1 As shown, the first connecting part consists of multiple spaced first protrusions 110 disposed on the inner surface of the drive wheel 100, with a first groove 120 between two adjacent first protrusions 110; the second connecting part consists of multiple spaced second protrusions 210 disposed on the outer surface of the connecting sleeve, with a second groove 220 between two adjacent second protrusions 210; and the first protrusions 110 and the second grooves 220 are adapted to each other, and the second protrusions 210 and the first grooves 120 are adapted to each other. When the second protrusions 210 of the transmission sleeve 200 are inserted into the first grooves 120, and the first protrusions 110 are also inserted into the second grooves 220, the connection between the transmission sleeve 200 and the drive wheel 100 is completed, so that the drive wheel 100 can transmit torque to the transmission sleeve 200, thereby driving the transmission sleeve 200 to rotate.

[0034] Furthermore, the number of second protrusions 210 is even, and the corresponding two second protrusions 210 are symmetrical along the central axis of the transmission sleeve 200, and the through hole 230 is formed on the second protrusion 210.

[0035] In this embodiment, there are four second protrusions 210, two through holes 230, and two pins 300. The two through holes 230 are respectively arranged on two second protrusions 210 symmetrically along the central axis of the transmission sleeve 200. The ball nut 400 located inside the transmission sleeve 200 is provided with two groove holes 420. The two groove holes 420 are respectively aligned with the two through holes 230. The pin 300 is inserted from the through hole 230 outside the transmission sleeve 200. Its head end is inserted into the groove hole 420 of the ball nut 400, and its tail end is flush with the outer surface of the second protrusion 210, thereby abutting against the inner surface of the first groove 120 of the drive wheel 100. The drive wheel 100 presses the pin 300 tightly, so that the pin 300 will not move along the diameter direction of the drive wheel 100.

[0036] like Figure 3 As shown, the two end faces of the inner hole 410 of the spherical nut 400 are flat, and the other parts of the outer surface of the spherical nut 400 are spherical. The groove hole 420 is elliptical in shape, and the width of the groove hole 420 is adapted to the diameter of the pin 300, so that the pin 300 can be locked in the groove hole 420, and the lower end of the pin 300 does not contact the lead screw 500.

[0037] In this embodiment, the interior of the transmission sleeve 200 is a spherical cavity structure, that is, a spherical hollow structure, and the size of the openings at both ends of the transmission sleeve 200 is smaller than the size of the spherical nut 400.

[0038] like Figure 4 , 5 As shown, both openings on the transmission sleeve 200 are inwardly contracted structures, and the diameter of their openings is smaller than the maximum diameter of the ball nut 400, so that the ball nut 400 is always located inside the transmission sleeve 200 and will not come out of the transmission sleeve 200.

[0039] like Figure 2 As shown, in this embodiment, the spherical nut 400 is threadedly connected to the lead screw 500 through the inner hole 410. The rotation of the drive wheel 100 drives the transmission sleeve 200 and the spherical nut 400 to rotate, thereby driving the lead screw 500 to make linear motion. Furthermore, due to the cooperation between the groove hole 420 on the spherical nut 400 and the pin 300, the lead screw 500 and the spherical nut 400 can rotate and swing together along the central axis of the pin 300. Figure 2 The screw 500 and ball nut 400 can also oscillate along the length of the groove hole 420, i.e. Figure 2 The screw 500 rotates in the vertical plane, with the rotation angle being such that the sidewall of the groove hole 420 moves along the length direction from one side of the sidewall to the other side of the sidewall, where it contacts the pin 300. Therefore, the design of the pin 300 successfully enables the swinging of the lead screw 500. When there is a misalignment between the door drive mechanism and the door installation, the swinging of the lead screw can eliminate this misalignment.

[0040] In this embodiment, the transmission component of the door drive mechanism has a recessed hole 420 on the nut, and the pin 300 is inserted into the recessed hole 420. First, the pin 300 can transmit torque. The rotation of the drive wheel 100 can drive the transmission sleeve 200 and the ball nut 400 to rotate together, thereby pushing the lead screw 500 to move linearly. The ball nut 400 and the lead screw 500 can swing in two directions along the axis of the pin 300 and the length direction of the recessed hole 420. Since the drive wheel 100 and the pin 300 do not swing when the lead screw 500 and the ball nut 400 swing, the pin 300 is self-aligned. The above structural design realizes the swing of the lead screw. When there is a certain precision deviation when the door is installed, the swing of the lead screw can also eliminate this deviation, avoid jamming when the door is opened and closed, reduce the precision of the door mounting hole, and reduce the space occupied by the structure of the lead screw 500 and the ball nut 400, which is beneficial for application in places with limited space such as car doors.

[0041] In addition, the transmission method of lead screw 500 and nut has fewer parts, less noise, and lower cost. The swingable design reduces installation accuracy and accommodates problems such as misalignment of hinge axes caused by tolerance issues in door and body sheet metal mounting holes. It also solves the jamming problem that may occur with the traditional lead screw 500 and nut transmission method.

[0042] Example 2

[0043] The difference between this embodiment and Embodiment 1 lies in the structure of the transmission sleeve 200; all other aspects are the same and will not be repeated here.

[0044] like Figure 5 , 6 As shown, in this embodiment, the two sides of the opening on one side of the transmission sleeve 200 are planar structures adapted to the two end faces of the inner hole 410 of the spherical nut 400, and the remaining part is a spherical structure adapted to the spherical surface of the spherical nut 400. That is to say, when the spherical nut 400 is rotated to a specific angle, the shape of the opening on that side of the transmission sleeve 200 exactly matches the shape of the spherical nut 400, thereby installing the spherical nut 400 inside the transmission sleeve 200. Then, when the spherical nut 400 is rotated to the position where the groove hole 420 is aligned with the through hole 230 on the transmission sleeve 200, the spherical nut 400 will not fall out of the opening of the transmission sleeve 200.

[0045] The structure in this embodiment allows the transmission sleeve 200 and the ball nut 400 to be manufactured separately and then assembled, which reduces the manufacturing difficulty. In embodiment 1, the ball nut 400 needs to be manufactured directly inside the transmission sleeve 200, which is more difficult to manufacture.

[0046] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A transmission assembly for a vehicle door drive mechanism, characterized in that, Includes a drive wheel (100), a transmission sleeve (200), a ball nut (400), a pin (300), and a lead screw (500). The inner surface of the drive wheel (100) is provided with a first connecting portion, and the outer surface of the transmission sleeve (200) is provided with a second connecting portion. The second connecting portion cooperates with the first connecting portion to connect the transmission sleeve (200) to the drive wheel (100). The transmission sleeve (200) has at least one pair of through holes (230) symmetrically arranged along the central axis of the transmission sleeve (200) on its side wall, and the number of pins (300) is the same as the number of through holes (230). The spherical nut (400) is installed inside the transmission sleeve (200). The spherical nut (400) has a through inner hole (410) with an internal thread. The spherical nut (400) is threaded to the lead screw (500) through the inner hole (410). The side wall of the spherical nut (400) also has recessed holes (420), the number of which is the same as the number of pins (300). The pin (300) is inserted into the through hole (230) and the groove hole (420) in sequence. The drive wheel (100) rotates, thereby driving the transmission sleeve (200) and the ball nut (400) to rotate, which in turn drives the lead screw (500) to make linear motion. The drive wheel (100), the transmission sleeve (200), and the pin (300) always maintain the same motion state.

2. The transmission assembly of the door drive mechanism according to claim 1, characterized in that, The first connecting part consists of a plurality of first protrusions (110) spaced apart on the inner surface of the drive wheel (100), and a first groove (120) is formed between two adjacent first protrusions (110); The second connecting part consists of a plurality of second protrusions (210) spaced apart on the outer surface of the connecting sleeve, and a second groove (220) is formed between two adjacent second protrusions (210); Furthermore, the first protrusion (110) is adapted to the second groove (220), and the second protrusion (210) is adapted to the first groove (120).

3. The transmission assembly of the door drive mechanism according to claim 2, characterized in that, The number of the second protrusions (210) is even, and the corresponding two second protrusions (210) are symmetrical along the central axis of the transmission sleeve (200).

4. The transmission assembly of the door drive mechanism according to claim 3, characterized in that, The perforation (230) is formed on the second protrusion (210).

5. The transmission assembly of the door drive mechanism according to claim 4, characterized in that, The two ends of the inner hole (410) of the spherical nut (400) are flat.

6. The transmission assembly of the door drive mechanism according to claim 5, characterized in that, The groove hole (420) is elliptical in shape.

7. The transmission assembly of the door drive mechanism according to claim 5, characterized in that, The transmission sleeve (200) has a ball-and-socket structure inside, and the size of the openings at both ends is smaller than the size of the spherical nut (400).

8. The transmission assembly of the door drive mechanism according to claim 5, characterized in that, The two inner sides of the opening on one side of the transmission sleeve (200) are planar structures that are adapted to the two end faces of the inner hole (410) of the spherical nut (400), and the remaining part is a spherical structure that is adapted to the spherical surface of the spherical nut (400).

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