Vehicle door driving mechanism

Abstract

The invention belongs to the technical field of electric vehicle doors, and provides a vehicle door driving mechanism which comprises a push rod, a shell, a lead screw nut, a lead screw and a motor driving assembly, the push rod is connected with the lead screw nut, the lead screw nut is connected with the lead screw, the motor driving assembly comprises a motor, a motor shaft, a worm gear and a worm, and the motor shaft is connected with the worm. The motor drives the worm to rotate after being electrified and drives the worm gear to rotate simultaneously, the worm gear is connected with the lead screw and drives the lead screw to rotate simultaneously, and meanwhile transmission is transmitted to the lead screw nut and drives the push rod to push and pull. The mechanism has the advantages that the mechanism appearance is enveloped and fixed, and the occupied space in a door is reduced; a push rod structure is adopted, and the arrangement rate is high in different environments; a worm and gear structure is adopted, the number of parts is reduced, noise is lowered, and meanwhile cost is lowered; a special structure is adopted, and abnormal sound is reduced.

Description

Technical Field

[0001] This invention belongs to the field of electric vehicle door technology, specifically relating to a door drive mechanism. Background Technology

[0002] Currently, actuators suffer from drawbacks such as large space occupation, numerous parts, high noise, and high cost. The swing-type door drive mechanism on the market occupies a large space, making it impossible to install inside most car doors. Furthermore, the left-right swinging motion can easily cause impacts to important components such as sheet metal and glass inside the door, affecting functionality. There are also drive mechanism structures on the market with a fixed envelope space, but components such as lead screws and bellows are exposed, occupying a large space, and the bellows are easily broken. Additionally, the large door opening affects the appearance, and the low driving force means it cannot properly drive the door under heavy loads. Another type of drive mechanism on the market is the parallel drive mechanism, which has a small installation space, but the reducer structure is complex, costly, and noisy, affecting the user experience. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a door drive mechanism that is simple in structure, easy to install and arrange, has a large driving force, low noise, and good waterproof performance, in light of the current state of the prior art.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a car door drive mechanism, characterized in that it includes a push rod, a housing, a lead screw nut, a lead screw, and a motor drive assembly. The push rod is connected to the lead screw nut, and the lead screw nut is connected to the lead screw. The motor drive assembly includes a motor, a motor shaft, a worm gear, and a worm. The motor shaft is connected to the worm. When the motor is energized, it drives the worm to rotate and simultaneously drives the worm gear to rotate. The worm gear is connected to the lead screw and simultaneously drives the lead screw to rotate, which in turn transmits the rotation to the lead screw nut and drives the push rod to push and pull.

[0005] In the aforementioned door drive mechanism, the push rod includes a ball socket, a push rod body, and a pin hole. The vehicle body bracket has a pin and is connected to the push rod via the pin. The pin is connected to the pin hole, and the other end of the push rod is provided with a ball socket and connected to a lead screw nut.

[0006] In the aforementioned door drive mechanism, the push rod further includes a limit block, which can block the housing and limit the fully open position when the push rod is pushed.

[0007] In the aforementioned door drive mechanism, the lead screw nut includes a nut portion, a nut bracket, a ball pin, and a guide end. The ball socket of the push rod is connected to the lead screw nut via the ball pin, and the nut is connected to the lead screw via the nut portion.

[0008] In the aforementioned door drive mechanism, the housing has a guide surface, and the lead screw nut is connected to the guide surface of the housing through its guide end, and the lead screw nut slides and rubs against the housing.

[0009] In the aforementioned door drive mechanism, the nut portion has internal threads and is threadedly connected to the external threads of the lead screw.

[0010] In the aforementioned door drive mechanism, the other end of the lead screw is connected to the inner hole of the worm gear. The worm gear has a first bearing and a second bearing at both ends. One end of the worm gear is connected to the first bearing, and the other end is connected to the second bearing. Finally, it is fixed by a locking block.

[0011] In the aforementioned door drive mechanism, the top end of the motor shaft has a motor shaft adjusting block, and the top end of the motor shaft is connected to the motor shaft adjusting block.

[0012] In one of the aforementioned door drive mechanisms, the lead screw nut is provided with a ball pin, which is spherically hinged to the ball socket in the push rod.

[0013] In the aforementioned door drive mechanism, a tail cover is provided on the housing, and a drainage groove is provided in the middle of the tail cover.

[0014] Compared with the prior art, the advantages of this invention are: the mechanism has a fixed outer shape, reducing the space occupied inside the door; the push rod structure has a high arrangement rate in different environments; the worm gear structure reduces the number of parts, reduces noise, and reduces costs; and the special structure reduces abnormal noise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the exterior of the door drive mechanism of this vehicle.

[0016] Figure 2 This is a cross-sectional schematic diagram of the door drive mechanism of this vehicle.

[0017] Figure 3 This is a cross-sectional view of the motor;

[0018] Figure 4 This is a schematic diagram of a lead screw and nut;

[0019] Figure 5 This is a schematic diagram of the push rod. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] In the diagram, the components are: mounting screw 100; body bracket 200; pin 300; push rod 400; ball socket 401; limit block 402; push rod body 403; pin hole 404; mounting base 500; housing 600; guide surface 601; lead screw nut 700; nut part 701; nut bracket 702; ball pin 703; guide end 704; lead screw 800; tail cap 900; first bearing 1000; second bearing 1001; locking block 1003; motor 1004; motor shaft adjusting block 1005; motor shaft 1006; worm gear 1007; and worm wheel 1008.

[0022] like Figure 1 As shown, this door drive mechanism is connected to the door via mounting screws 100 and the body bracket 200 is connected to the body. It mainly includes a push rod 400, a housing 600, a lead screw nut 700, a lead screw 800, and a motor drive assembly. The push rod 400 includes a ball socket 401, a push rod body 403, and a pin hole 404. The lead screw nut 700 includes a nut part 701, a nut bracket 702, a ball pin 703, and a guide end 704. The motor drive assembly includes a motor 1004, a motor shaft 1006, a worm gear 1008, and a worm 1007. This patent mainly abandons the use of planetary gears and intermediate gears, replacing them with fewer parts such as worm gears and worms. It adopts a lead screw 800 and nut structure. The lead screw nut 700 connects to the push rod 400, thereby driving the component to open and close.

[0023] Specifically, such as Figure 2 As shown, the vehicle body bracket 200 is connected to the push rod 400 via a pin 300, wherein the pin 300 is connected to a pin hole 404, and the other end of the push rod 400 is provided with a ball socket 401 and is connected to the lead screw nut 700 via a ball pin 703. The lead screw nut 700 is connected to the housing 600 via its guide end 704, and the end of the housing 600 has a mounting seat 500; as Figure 4 As shown, the lead screw nut 700 is connected to the lead screw 800 through its own nut part 701. The nut part 701 has internal threads that are threaded to connect with the external threads of the lead screw. The other end of the lead screw 800 is connected to the inner hole of the worm gear 1008. One end of the worm gear 1008 is connected to the first bearing 1000, and the other end is connected to the second bearing 1001. Finally, it is fixed by the locking block 1003. Here, the locking block 1003 can be a plate, a snap-fit ​​structure, a riveting structure, a threaded structure, etc., all of which are within the protection range.

[0024] like Figure 3 As shown, the housing 600 has a turbine hole and a motor hole. A motor 1004 is installed in the motor hole, and a motor shaft 1006 is mounted on the motor 1004. A worm gear 1007 is installed outside the motor shaft 1006. The top end of the motor shaft 1006 is connected to a motor shaft adjusting block 1005. Figure 5As shown, the push rod 400 has a ball socket 401, a limiting block 402, a push rod body 403, and a pin hole 404. When the motor 1004 is powered on, it rotates, driving the worm gear 1007 on the motor shaft 1006 to rotate, simultaneously driving the worm wheel 1008 to rotate. The worm wheel 1008 is connected to the lead screw 800, also driving the lead screw 800 to rotate. This worm gear structure reduces the number of parts, lowers noise, and reduces cost. Furthermore, the mechanism's shape is fixed, reducing the space occupied inside the door. The power is transmitted to the lead screw nut 700. Because the lead screw nut 700 has a nut part 701 and an external guide end 704 connected to the guide surface 601 of the housing 600, the lead screw nut 700 can move linearly along the axis of the lead screw 800. The lead screw nut 700 slides against the housing 600. The guide surface 601 can be a two-sided, four-sided, or six-sided structure. The lead screw nut 700 is provided with a ball pin 703, which is spherically hinged to the ball socket 401 in the push rod 400. This gives the push rod 400 a push-pull function, as well as the function of rotating up, down, left, and right, so that it can move adaptively when pushing and pulling. The other end of the push rod 400 is hinged to the body bracket 200 through the pin hole 404. At the same time, the push rod 400 is provided with a limiting block 402 in the middle. The limiting block 402 can block the housing 600 when the push rod 400 is pushed and limit the fully open position. In addition, the housing 600 is provided with a tail cover 900. The tail cover 900 is provided with a drainage groove in the middle. The tail cover 900 can have a bearing hole inside or not, so as to have good waterproof performance.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications to the described specific embodiments or adopt similar methods to replace them, but without departing from the scope defined by the spirit of the invention.

Claims

1. A door drive mechanism, characterized by, Including push rod, shell, screw nut, screw rod and motor drive assembly, push rod and screw nut are connected, screw nut and screw rod are connected, motor drive assembly includes motor, motor shaft, worm and worm gear, motor shaft and worm are connected, motor drives worm to rotate, worm gear is rotated, worm gear and screw rod are connected, screw rod is rotated, screw nut is transmitted to push rod and drives push rod to push and pull.

2. A door drive mechanism according to claim 1, characterized in that The push rod includes a ball socket, a push rod body, and a pin hole. The vehicle body support has a pin shaft and is connected to the push rod through the pin shaft. The pin shaft is connected to the pin hole. The other end of the push rod is provided with a ball socket and is connected to the screw nut.

3. A vehicle door drive mechanism according to claim 2, wherein The push rod also includes a limiting block that can block the shell when the push rod is in the full open position.

4. A vehicle door drive mechanism according to claim 2, wherein The screw nut includes a nut part, a nut support, a ball pin, and a guide end. The ball socket of the push rod is connected to the screw nut through the ball pin. The nut is connected to the screw rod through the nut part.

5. A vehicle door drive mechanism according to claim 4, wherein The shell has a guide surface. The screw nut is connected to the guide surface of the shell through the guide end. The screw nut and the shell slide and rub.

6. A vehicle door drive mechanism according to claim 5, wherein The nut part is internally provided with a thread and is threadedly connected to the external thread of the screw rod.

7. A door drive mechanism according to claim 1, wherein The other end of the screw rod is connected to the inner hole of the worm gear. The worm gear has a first bearing and a second bearing at both ends. One end of the worm gear is connected to the first bearing, and the other end is connected to the second bearing. Finally, the worm gear is fixed through a locking block.

8. A vehicle door drive mechanism according to claim 1, wherein The motor shaft top end has a motor shaft adjusting block. The motor shaft top end is connected to the motor shaft adjusting block.

9. A vehicle door drive mechanism according to claim 4, wherein The screw nut is provided with a ball pin. The ball pin is ball-jointed to the ball socket in the push rod.

10. A vehicle door drive mechanism according to claim 1, wherein The shell is provided with a tail plug. The tail plug is provided with a drainage groove.

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