Driver for automobile door handle

Abstract

The utility model relates to the technical field of automobile door handles, in particular to a driver for an automobile door handle, which comprises a casing, a driving shaft and a driving motor, a speed reduction transmission mechanism is further arranged between the driving shaft and the driving motor, and rotary output of the driving motor is converted into linear motion of the driving shaft through matching of the speed reduction transmission mechanism and the driving shaft. The driving shaft comprises a push rod part, a lead screw part and a sliding rod part, a second-stage turbine is arranged in the middle of the sliding rod part, the axis of the second-stage turbine is of a hollow structure, the second-stage turbine is connected with the middle of the sliding rod part in a sleeving mode, and a rotation limiting assembly is further arranged between the second-stage turbine and the sliding rod part; the second-stage turbine can reduce the machining precision of the driving shaft through the structure that the second-stage turbine is connected with the sliding rod part in a sleeved mode, the machining cost of the driving shaft can be reasonably reduced, the second-stage turbine and the sliding rod part are easy to assemble, and meanwhile high transmission adaptability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile door handles, in particular to a driver for automobile door handles. Background Art

[0002] As society continues to progress, the number of cars in China is increasing, and most families have cars. Car companies are also constantly improving various parts of cars. Traditional car door handles are protruding outside the car door. The existing new energy vehicles use hidden door handles on the doors, and the appearance of the car can be improved and smoothed. The hidden door handle is generally equipped with a driver to push the hidden door handle outward.

[0003] According to the existing Chinese utility model patent with announcement number CN213573478U, a driver for a hidden door handle of an automobile is recorded, and its structure includes a housing and a transmission mechanism, and the transmission mechanism includes a motor and a two-stage worm gear mechanism, wherein a screw is provided at one axial end of the second turbine matched with the second worm, and a push rod is provided at the other end, and a screw nut groove matched with the screw is opened on the inner wall of the housing, and the end of the push rod passes through the housing, and the rotation of the output shaft of the motor is converted into the linear motion of the push rod through the two-stage worm gear mechanism and the screw movement. Specifically, it is disclosed in detail in the specification that the push rod, the screw rod and the second turbine are an integrally formed structure, and the second turbine is specially set to a helical gear shaft structure, so that the second turbine can follow the push rod and the screw rod for linear motion when it is matched with the second worm rod for transmission, and its structure is exquisite and fully and reasonably optimizes the internal structure of the housing.

[0004] However, the push rod, the lead screw and the second turbine are an integrally formed structure, and multiple transmission coordination is required at the middle and tail parts of the same part, including threaded linear transmission and meshing rotary transmission, which requires extremely high processing accuracy, resulting in high production costs and not conducive to large-scale production by enterprises to meet the supply of the new energy vehicle market. Therefore, in view of these current situations, it is urgent to develop a driver for automobile door handles to meet the needs of actual use. Utility Model Content

[0005] The utility model aims to provide a driver for automobile door handles, which is used to solve the defect that a push rod, a screw rod and a second turbine are an integrally formed structure, and multiple transmission cooperations need to be performed simultaneously at the middle and tail parts of the same part, including threaded linear transmission and meshing rotation transmission, which requires extremely high processing accuracy.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A driver for an automobile door handle comprises a shell, a drive shaft and a drive motor. The drive shaft can be located at one side of the shell for linear motion and pass through the outside of one side of the shell. A reduction transmission mechanism is also provided between the drive shaft and the drive motor. The rotational output of the drive motor is converted into linear motion of the drive shaft through the reduction transmission mechanism and the drive shaft. The drive shaft comprises a push rod portion, a screw rod portion and a sliding rod portion. The push rod portion is arranged at one end of the drive shaft, and the push rod portion is used to pass through the outside of one side of the shell. The screw rod portion is arranged at the other end of the drive shaft. The drive shaft is threadedly matched with the inside of the shell through the screw rod portion to provide a linear driving force. The sliding rod portion is arranged in the middle of the drive shaft, and a secondary turbine is provided in the middle of the sliding rod portion. The axis of the secondary turbine is a hollow structure. The secondary turbine is sleeved with the middle of the sliding rod portion. A rotation limit assembly is also provided between the secondary turbine and the sliding rod portion. The secondary turbine can drive the sliding rod portion to rotate synchronously through the rotation limit assembly.

[0008] In the above description, as a further solution, the rotation limit assembly includes a spline hole and a limit rib. The limit rib is a long strip structure. The spline hole is opened at the axis center of the secondary turbine. When the secondary turbine is sleeved with the sliding rod, the limit rib can cooperate with the spline hole for limiting.

[0009] In the above description, as a further solution, a plurality of limiting ribs are provided, and the limiting ribs are distributed on the surface of the sliding rod in a circular array structure, and the limiting ribs and the sliding rod are an integrally formed structure.

[0010] In the above description, as a further solution, a first stroke cavity is opened on the inner wall of the shell, and a threaded rib cooperating with the screw rod part is provided inside the first stroke cavity. The drive shaft is threadedly matched with the threaded rib of the first stroke cavity through the screw rod part to provide a linear driving force. A second stroke cavity is opened on the inner wall of the shell, and one end of the second stroke cavity passes through one side of the shell, and the push rod part is movably embedded in the second stroke cavity, and the first stroke cavity and the second stroke cavity are located on the same axis.

[0011] In the above description, as a further solution, the reduction transmission mechanism includes a primary worm, a primary turbine and a secondary worm. The primary worm is arranged on the output shaft of the driving motor, one end of the secondary worm is fixedly connected to the axial direction of the primary turbine, the primary turbine is meshed with the primary worm, and the secondary worm is meshed with the secondary turbine.

[0012] In the above description, as a further solution, a limiting cavity matching the second-stage turbine is provided on the inner wall of the shell, and the second-stage turbine is rotatably arranged inside the limiting cavity.

[0013] In the above description, as a further solution, a rotating cavity is provided on the inner wall of the shell, the secondary worm is rotatably arranged inside the rotating cavity, and the rotating cavity and the limiting cavity are mutually conductive structures.

[0014] In the above description, as a further solution, the secondary worm and the primary turbine are an integrally formed structure.

[0015] In the above description, as a further solution, a matching motor installation cavity is also provided inside the shell, and the driving motor is embedded and fixed in the motor installation cavity. A rotating cavity is opened on the side of the motor installation cavity close to the primary worm gear, and the rotating cavity and the motor installation cavity are mutually connected. The primary worm gear extends into the rotating cavity for rotation.

[0016] In the above description, as a further solution, a sealing groove is provided at the end of the second stroke chamber away from the first stroke chamber. The sealing groove is an annular structure. A sealing ring is provided inside the sealing groove. The sealing ring is an annular structure. The outer edge of the sealing ring is embedded and fixed inside the sealing groove, and the middle part of the sealing ring can be sleeved on the push rod part of the drive shaft.

[0017] The beneficial effects produced by the utility model are as follows:

[0018] The present application discloses a driver for a car door handle, wherein a driving shaft comprises a push rod portion, a screw rod portion and a sliding rod portion, and the middle portion of the secondary turbine and the sliding rod portion is a sleeve-connected slidable structure. When the screw rod portion and the housing perform a threaded linear motion, the secondary turbine can maintain a motion trajectory unchanged on a straight line through the sleeve-connected structure with the sliding rod portion, and the secondary turbine can drive the sliding rod portion to rotate synchronously through a rotation limit assembly, thereby continuously providing a continuous rotation output for the screw rod portion, and a structure in which the two do not interfere with each other in motion can be formed;

[0019] At the same time, the second-stage turbine can reduce the processing accuracy of the drive shaft through the structure of sleeve connection with the sliding rod portion, which can reasonably reduce the processing cost of the drive shaft. The assembly between the two is simple and has high transmission adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view structural diagram of a driver for a car door handle according to the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a driver for a car door handle according to the utility model;

[0022] Figure 3 This is a schematic structural diagram of a housing in a driver for a car door handle according to the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of a driver for a car door handle according to the utility model;

[0024] In the figure: 1-driving shaft, 11-push rod part, 12-screw rod part, 13-sliding rod part, 131-limiting rib, 2-housing, 21-first stroke chamber, 211-threaded rib, 22-limiting chamber, 23-second stroke chamber, 24-sealing groove, 25-rotating chamber, 26-motor mounting chamber, 27-rotating chamber, 3-driving motor, 4-first-stage worm, 51-first-stage turbine, 52-second-stage worm, 6-second-stage turbine, 61-spline hole, 7-sealing ring. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0026] See also Figure 1-4 The specific implementation of a driver for a car door handle includes a housing 2, a drive shaft 1 and a drive motor 3. The drive shaft 1 can be located at one side of the housing 2 for linear motion and penetrate to the outside of one side of the housing 2. A reduction transmission mechanism is also provided between the drive shaft 1 and the drive motor 3. The rotation output of the drive motor 3 is converted into the linear motion of the drive shaft 1 through the reduction transmission mechanism and the drive shaft 1. The drive shaft 1 includes a push rod portion 11, a screw rod portion 12 and a sliding rod portion 13. The push rod portion 11 is provided at one end of the drive shaft 1. The push rod portion 11 is used to push the push rod portion 11 to penetrate the housing 2. To the outside of one side of the shell 2, the screw rod portion 12 is arranged at the other end of the driving shaft 1, and the driving shaft 1 is threadedly matched with the inside of the shell 2 through the screw rod portion 12 to provide a linear driving force. The sliding rod portion 13 is arranged in the middle of the driving shaft 1, and a secondary turbine 6 is provided in the middle of the sliding rod portion 13. The axis of the secondary turbine 6 is a hollow structure, and the secondary turbine 6 is sleeved with the middle of the sliding rod portion 13. A rotation limit assembly is also provided between the secondary turbine 6 and the sliding rod portion 13, and the secondary turbine 6 can drive the sliding rod portion 13 to rotate synchronously through the rotation limit assembly.

[0027] Specifically, Figure 2 As shown, the rotation limiting assembly includes a spline hole 61 and a limiting rib 131. The limiting rib 131 is a long strip structure. The spline hole 61 is opened at the axis center of the secondary turbine 6. When the secondary turbine 6 is sleeved with the sliding rod 13, the limiting rib 131 can cooperate with the spline hole 61 for limiting.

[0028] The middle part of the secondary turbine 6 and the sliding rod 13 is a slidable structure that is sleeved. When the screw rod 12 and the housing 2 perform threaded linear motion, the secondary turbine 6 can maintain the motion trajectory unchanged in a straight line through the structure that is sleeved with the sliding rod 13. At the same time, the secondary turbine 6 can drive the sliding rod 13 to rotate synchronously through the rotation limit assembly, and can continuously provide continuous rotation output for the screw rod 12, and a structure in which the two movements do not interfere with each other can be formed.

[0029] Specifically in a further scheme, such as Figure 2 As shown, there are four limiting ribs 131, which are arranged on the surface of the sliding rod 13 in a circumferential array structure, and the limiting ribs 131 and the sliding rod 13 are an integrally formed structure. By arranging a plurality of limiting ribs 131 in a circumferential array structure on the surface of the sliding rod 13, a larger contact area can be obtained with the spline hole 61 of the secondary turbine 6, so that the secondary turbine 6 outputs more power fulcrums to the sliding rod 13, and the rotational output force of the secondary turbine 6 is fully transmitted to the middle of the sliding rod 13.

[0030] Specifically, Figure 2 and Figure 3 As shown, a first stroke cavity 21 is provided on the inner wall of the shell 2, and a threaded rib 211 cooperating with the screw rod portion 12 is provided inside the first stroke cavity 21. The drive shaft 1 is threadedly matched with the threaded rib 211 of the first stroke cavity 21 through the screw rod portion 12 to provide a linear driving force. A second stroke cavity 23 is provided on the inner wall of the shell 2, and one end of the second stroke cavity 23 passes through one side of the shell 2. The push rod portion 11 is movably embedded in the second stroke cavity 23, and the first stroke cavity 21 and the second stroke cavity 23 are located on the same axis.

[0031] When the rotational output force of the secondary turbine 6 is transmitted to the middle part of the sliding rod part 13, the screw rod part 12 can rotate synchronously with the sliding rod part 13. At the same time, the screw rod part 12 is threadedly matched with the threaded rib 211 of the first stroke chamber 21 to move linearly along the axis of the first stroke chamber 21. This is the key structure for driving the push rod part 11 to move linearly along the axis of the second stroke chamber 23.

[0032] Specifically, Figure 2 and Figure 4 As shown, the reduction transmission mechanism includes a primary worm 4, a primary turbine 51 and a secondary worm 52. The primary worm 4 is arranged on the output shaft of the driving motor 3, one end of the secondary worm 52 is fixedly connected to the axial direction of the primary turbine 51, and the secondary worm 52 and the primary turbine 51 are an integrally formed structure. The primary turbine 51 is meshed with the primary worm 4 for transmission, and the secondary worm 52 is meshed with the secondary turbine 6 for transmission.

[0033] Specifically, Figure 3 and Figure 4As shown, a limiting cavity 22 matching the secondary turbine 6 is provided on the inner wall of the shell 2, and the secondary turbine 6 is rotatably arranged inside the limiting cavity 22. A rotating cavity 25 is provided on the inner wall of the shell 2, and the secondary worm 52 is rotatably arranged inside the rotating cavity 25, and the rotating cavity 25 and the limiting cavity 22 are mutually conductive structures. A matching motor mounting cavity 26 is also provided inside the shell 2, and the driving motor 3 is embedded and fixed in the motor mounting cavity 26. A rotating cavity 27 is provided on the side of the motor mounting cavity 26 close to the primary worm 4, and the rotating cavity 27 and the motor mounting cavity 26 are mutually conductive structures, and the primary worm 4 extends to the inside of the rotating cavity 27 for rotation.

[0034] A sealing groove 24 is provided at the end of the second stroke chamber 23 away from the first stroke chamber 21. The sealing groove 24 is an annular structure. A sealing ring 7 is provided inside the sealing groove 24. The sealing ring 7 is an annular structure. The outer edge of the sealing ring 7 is embedded and fixed inside the sealing groove 24, and the middle part of the sealing ring 7 can be sleeved on the push rod part 11 of the drive shaft 1.

[0035] A sealing ring 7 is provided in the sealing groove 24 opened at the end of the second stroke chamber 23, and the middle part of the sealing ring 7 is sleeved on the push rod part 11 of the drive shaft 1. When the car is wading or in rainy days, a dry environment can be maintained inside the driver for the car door handle, thereby isolating moisture, waterproofing and preventing erosion.

[0036] A working process of a driver for an automobile door handle: a driving motor 3 drives a primary worm 4 located in a rotating chamber 27 to rotate, and at the same time, the primary worm 4 is meshed with a primary turbine 51 for transmission, and synchronously, a secondary worm 52 rotates along the axial direction of the primary turbine 51, and the secondary worm 52 is meshed with a secondary turbine 6 for transmission, and the secondary turbine 6 is located in a limiting chamber 22 for rotation, and the secondary turbine 6 can be limited by the spline hole 61 through an internal spline hole 61 and a limiting rib 131, thereby driving a sliding rod 13 to rotate, and when the rotational output force of the secondary turbine 6 is transmitted to the middle part of the sliding rod 13, the screw rod 12 can rotate synchronously with the sliding rod 13, and at the same time, the sliding rod 13 is threadedly matched with the threaded rib 211 of the first stroke chamber 21 to move linearly along the axis of the first stroke chamber 21, so that the push rod 11 of the drive shaft 1 can be pushed outward to control the opening and closing of the automobile door handle.

[0037] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A driver for a car door handle, comprising a housing, a drive shaft and a drive motor, wherein the drive shaft can be located on one side of the housing for linear motion and penetrates to the outside of one side of the housing, and a reduction transmission mechanism is provided between the drive shaft and the drive motor, and the rotation output of the drive motor is converted into the linear motion of the drive shaft through the reduction transmission mechanism and the drive shaft, characterized in that: The driving shaft comprises a push rod portion, a screw rod portion and a sliding rod portion, wherein the push rod portion is arranged at one end of the driving shaft and is used to penetrate to the outside of one side of the housing, and the screw rod portion is arranged at the other end of the driving shaft, and the driving shaft is threadedly matched with the inside of the housing through the screw rod portion to provide a linear driving force; The sliding rod is arranged in the middle part of the driving shaft, and a secondary turbine is provided in the middle part of the sliding rod. The axis of the secondary turbine is a hollow structure. The secondary turbine is sleeved with the middle part of the sliding rod. A rotation limit assembly is also provided between the secondary turbine and the sliding rod. The secondary turbine can drive the sliding rod to rotate synchronously through the rotation limit assembly.

2. The driver for a vehicle door handle according to claim 1, characterized in that: The rotation limiting assembly includes a spline hole and a limiting rib. The limiting rib is a long strip structure. The spline hole is arranged at the axis center of the secondary turbine. When the secondary turbine is sleeved with the sliding rod, the limiting rib can cooperate with the spline hole for limiting.

3. The driver for a vehicle door handle according to claim 2, characterized in that: There are a plurality of limiting ribs, which are distributed on the surface of the sliding rod in a circular array structure, and the limiting ribs and the sliding rod are an integrally formed structure.

4. The driver for a vehicle door handle according to claim 1, characterized in that: A first stroke cavity is formed on the inner wall of the housing, a threaded rib matching with the screw rod is formed inside the first stroke cavity, and the drive shaft is threadedly matched with the threaded rib of the first stroke cavity through the screw rod to provide a linear driving force; A second stroke cavity is provided on the inner wall of the shell, one end of the second stroke cavity passes through one side of the shell, the push rod part is movably embedded in the second stroke cavity, and the first stroke cavity and the second stroke cavity are located on the same axis.

5. The driver for a vehicle door handle according to any one of claims 1 to 4, characterized in that: The reduction transmission mechanism includes a primary worm, a primary turbine and a secondary worm. The primary worm is arranged on the output shaft of the driving motor. One end of the secondary worm is fixedly connected to the axial direction of the primary turbine. The primary turbine is meshed with the primary worm for transmission, and the secondary worm is meshed with the secondary turbine for transmission.

6. The driver for a vehicle door handle according to claim 5, characterized in that: A limiting cavity matching the secondary turbine is provided on the inner wall of the shell, and the secondary turbine is rotatably arranged inside the limiting cavity.

7. The driver for a vehicle door handle according to claim 6, characterized in that: A rotating cavity is arranged on the inner wall of the shell, the secondary worm is rotatably arranged inside the rotating cavity, and the rotating cavity and the limiting cavity are mutually conductive structures.

8. The driver for a vehicle door handle according to claim 5, characterized in that: The secondary worm and the primary turbine are an integrally formed structure.

9. The driver for a vehicle door handle according to claim 5, characterized in that: The shell is also provided with a matching motor installation cavity inside, and the driving motor is embedded and fixed in the motor installation cavity. A rotating cavity is opened on the side of the motor installation cavity close to the primary worm gear. The rotating cavity and the motor installation cavity are mutually connected. The primary worm gear extends into the rotating cavity for rotation.

10. The driver for a vehicle door handle according to claim 4, characterized in that: A sealing groove is provided at the end of the second stroke chamber away from the first stroke chamber. The sealing groove is an annular structure. A sealing ring is provided inside the sealing groove. The sealing ring is an annular structure. The outer edge of the sealing ring is embedded and fixed inside the sealing groove, and the middle part of the sealing ring can be sleeved on the push rod part of the drive shaft.

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