Hidden electric door handle actuator

Abstract

The hidden electric door handle actuator comprises a shell, a driving motor, a gear transmission component and a transmission rod, the driving motor, the gear transmission component and the transmission rod are installed in the shell, the gear transmission component comprises a first-stage worm, an intermediate gear assembly and a second-stage bevel gear, an output shaft of the driving motor is connected with the first-stage worm, the first-stage worm is meshed with the intermediate gear, and the intermediate gear assembly is meshed with the second-stage bevel gear. The intermediate gear is meshed with the second-stage bevel gear, a channel is formed in the shell, the transmission rod is installed in the channel, the second-stage bevel gear is arranged at one end of the channel, a lead screw extending into the channel is arranged on the second-stage bevel gear, and at least one boss in sliding connection with the channel is arranged on the outer side wall of the sleeve to limit rotation of the transmission rod. The sleeve comprises an internal thread matched with the screw rod in a threaded mode so that the driving motor can drive the transmission rod to do reciprocating rectilinear motion in the channel in the axial direction of the transmission rod through the gear transmission component. The movement stability of the transmission rod is improved, and the service life of the transmission rod is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of automobile door handle actuators, and in particular to a hidden electric door handle actuator. Background Art

[0002] The car door handle actuator is an electrical component that generates power when the car door handle is extended. When assembled and used, it can allow the hidden door handle to slowly pop out from the car body, making the car body simpler and more technological. The car door handle actuator currently on the market works by connecting the motor inside the car door handle actuator to the gear transmission assembly, which drives the transmission rod to extend or retract.

[0003] It can be seen that in the actual working process, the rotation of the motor needs to be converted into the action of the actuator through the transmission of the gear transmission assembly. In the process of gear transmission, the parts will inevitably vibrate, and in the process of converting the rotational motion into linear motion, the transmission rod needs to overcome a certain torque. Under long-term and frequent movements, the installation structure of the transmission rod will produce a certain degree of wear, which will cause the matching clearance of the installation structure to gradually increase, and the shaking of the transmission rod will further increase, which will easily cause the car door handle actuator to operate poorly, making the car door handle unable to be extended or retracted in time. Therefore, how to improve the stability of the operation of the transmission rod and the service life is a problem that technicians in this field urgently need to solve. Utility Model Content

[0004] The present application aims to solve one of the technical problems in the related art to a certain extent. To this end, the present application provides a hidden electric door handle actuator.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a hidden electric door handle actuator, comprising a shell and a driving motor, a gear transmission component and a transmission rod installed in the shell, the gear transmission component comprising a primary worm, an intermediate gear assembly and a secondary bevel gear, the output shaft of the driving motor is connected to the primary worm, the primary worm is meshed with the intermediate gear, the intermediate gear is meshed with the secondary bevel gear, a channel is provided in the shell, the secondary bevel gear is arranged at one end of the channel, the secondary bevel gear is provided with a screw extending into the channel, at least one boss slidably connected to the channel is provided on the outer wall of the transmission rod to limit the rotation of the transmission rod, the sleeve comprises an internal thread matching the screw thread so that the driving motor can drive the transmission rod to make forward or backward linear motion in the channel along its axial direction through the gear transmission component.

[0006] In the present technical solution, the setting of the boss can not only improve the stability of the linear motion of the transmission rod, but also limit the rotation of the transmission rod. Combined with the structure of the internal thread on the sleeve and the screw rod, the rotational motion of the drive motor can be converted into the reciprocating linear motion of the transmission rod. In addition, the thread matching structure makes the movement more reliable.

[0007] The present application is further configured such that the transmission rod includes a sleeve and a push rod connected to the sleeve, an oil-containing bearing supporting the push rod is provided between the transmission rod and the housing, a guide section matching the sleeve is formed in the channel, the inner wall of the guide section fits the outer wall of the sleeve, and bearings are provided at both ends of the gear shaft of the secondary helical gear. Through this configuration, the guidance and support of the transmission rod are increased, the influence of the installation gap or the vibration generated by the transmission on the movement of the transmission rod is reduced, and the stability of the movement of the transmission rod is improved; the bearings at both ends of the secondary helical gear can improve the stability of the helical gear transmission, thereby providing greater thrust.

[0008] The present application is further configured such that a first limit platform and a second limit platform are formed at both ends of the channel, the boss has a first end face and a second end face, the first limit platform can resist the first end face to limit the position of the forward movement of the transmission rod, and the second limit platform can resist the second end face to limit the position of the backward movement of the transmission rod.

[0009] The present application is further configured that the intermediate gear assembly includes an intermediate helical gear meshed with the primary worm and an intermediate worm meshed with the secondary helical gear, and the thread direction of the primary worm, the intermediate helical gear, the intermediate worm, and the secondary helical gear are all right-handed. The right-handed helical design can offset the axial force to a certain extent and increase the service life of the components.

[0010] The present application is further configured that the intermediate gear assembly also includes an intermediate gear shaft, and the intermediate gear shaft is provided with an oil storage tank, and the oil storage tank stores lubricating grease. Through this configuration, during operation, the lubricating grease can reduce friction resistance, improve transmission efficiency and the service life of components.

[0011] The present application is further configured that slideways recessed in the inner side wall of the channel are respectively provided in four directions of the channel, and four bosses are provided on the sleeve, the bosses correspond to the slideways one by one and the bosses are slidably connected in the slideways. Such a structure can well limit the position of the sleeve in multiple directions, reduce the shaking caused by long-term use and wear, and improve the stability of operation.

[0012] The present application is further configured that a first sealing ring is provided between the push rod and the housing and is located outside the oil-containing bearing, thereby improving the sealing performance and preventing external impurities from entering the housing through the matching gap between the transmission rod and the housing and affecting the normal operation of the components.

[0013] The present application is further configured such that the housing includes an upper housing and a lower housing, a guide device is provided between the upper housing and the lower housing, the guide device includes a guide protrusion provided on the upper housing and a guide groove provided on the lower housing, and the upper housing and the lower housing are fixed by laser welding. The guide device can improve the assembly efficiency and assembly accuracy of the housing; laser welding and fixing can improve the overall sealing performance, the welding anchor point is longer, the upper and lower housings are firmly joined, and can withstand a larger axial force of the helical gear.

[0014] The present application is further configured that the primary worm is made of metal material, the intermediate bevel gear and the intermediate worm are made of reinforced plastic, and the secondary bevel gear is made of reinforced nylon, so as to ensure the normal meshing transmission of each transmission component, avoid the bonding phenomenon between the same materials, reduce noise and reduce costs.

[0015] The present application is further configured that washers are provided at both ends of the intermediate gear shaft, and the intermediate gear assembly is arranged at an angle. The arrangement of washers can reduce friction during the operation of components and improve transmission efficiency; the inclined arrangement of the intermediate gear assembly can reduce the volume of the overall structure.

[0016] The present application is further configured that the housing is provided with a connection port for connecting the drive motor to an external accessory, a second sealing ring is provided at the connection port, and a plug-in connected to the drive motor is provided at the connection port. The second sealing ring can improve the waterproof and dustproof performance of the connection port.

[0017] These features and advantages of the present application will be disclosed in detail in the following specific embodiments and drawings. The best embodiments or means of the present application will be described in detail in conjunction with the drawings, but they are not intended to limit the technical solutions of the present application. In addition, there are multiple features, elements, and components that appear in each of the following texts and drawings, and different symbols or numbers are marked for convenience, but they all represent components with the same or similar structures or functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 This is a diagram of the internal structure of one of the embodiments of the present application after removing the lower shell;

[0020] Figure 2 This is a structural diagram of an upper shell of one embodiment of the present application;

[0021] Figure 3 This is a structural diagram of the lower shell of one of the embodiments of the present application;

[0022] Figure 4 This is a transmission connection structure diagram of a driving motor and a gear transmission component of one embodiment of the present application;

[0023] Figure 5 This is a structural diagram of an intermediate gear shaft according to one embodiment of the present application;

[0024] Figure 6 This is a structural diagram of a transmission rod in one embodiment of the present application;

[0025] Figure 7 This is an overall structural diagram of one of the embodiments of the present application.

[0026] in,

[0027] 1. Shell; 11. Upper shell; 12. Lower shell; 13. Guide protrusion; 14. Guide groove;

[0028] 2. Drive motor;

[0029] 31. First-stage worm; 32. Intermediate helical gear; 33. Intermediate worm; 34. Second-stage helical gear; 35. Intermediate gear shaft; 36. Oil storage tank; 37. Screw; 38. Bearing;

[0030] 4. Transmission rod; 41. Sleeve; 42. Push rod; 43. Boss; 44. Internal thread;

[0031] 5. channel; 51. slideway; 52. guide section; 53. first limit platform; 54. second limit platform;

[0032] 6. Oil-containing bearing; 7. First sealing ring; 8. Connector. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments based on the embodiments are intended to be used to explain the present application and cannot be understood as limiting the present application.

[0034] References to "one embodiment" or "an example" or "an example" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment disclosed in the present application. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0035] One embodiment of the present application provides a hidden electric door handle actuator, see attached Figure 1 , Figure 6 , Figure 7, including a shell 1 and a driving motor 2 installed in the shell 1, a gear transmission component and a transmission rod 4. When in use, the output end of the transmission rod 4 is connected to the door handle. The gear transmission component includes a primary worm 31, an intermediate gear assembly and a secondary bevel gear 34. The output shaft of the driving motor 2 is connected to the primary worm 31, the primary worm 31 is meshed with the intermediate gear, and the intermediate gear is meshed with the secondary bevel gear 34. The transmission rod 4 includes a sleeve 41 and a push rod 42 connected to the sleeve 41. A channel 5 is provided in the shell 1. The transmission rod 4 is installed in the channel 5. At least one boss slidably connected to the channel 5 is provided on the outer wall of the sleeve 41 to limit the rotation of the transmission rod 4. The secondary bevel gear 34 is arranged at one end of the channel 5. The secondary bevel gear 34 is provided with a screw rod 37 extending into the channel 5. The sleeve 41 includes an internal thread 44 threadedly matched with the screw rod 37 so that the driving motor 2 can drive the transmission rod 4 to perform reciprocating linear motion in the channel 5 along its axial direction through the gear transmission component.

[0036] The secondary bevel gear 34 and the screw rod 37 in this embodiment are an integrated structure, which are integrally mounted in the housing 1. Under the drive of the drive motor 2 and the intermediate gear assembly, they rotate in the housing 1 but cannot slide. The push rod 42 and the sleeve 41 are an integrated structure, which are integrally mounted in the housing 1. The sleeve 41 is connected to the channel 5 through a boss, so that the sleeve 41 and the transmission rod 4 can only move linearly along the channel 5 under the action of the boss 43 but cannot rotate. In addition, the internal thread 44 on the sleeve 41 is threadedly matched with the external thread of the screw rod 37. In this way, with the structure of the boss 43, the rotation of the secondary bevel gear 34 can drive the sleeve 41 and the transmission rod 4 to move linearly through the screw rod 37.

[0037] It can be seen that in the cooperative transmission structure of the screw 37 and the sleeve 41, the rotation of the screw 37 causes the sleeve 41 and the transmission rod 4 to have a tendency to rotate, but the cooperation between the boss 43 and the channel 5 limits their rotation. Such a structure can not only limit the rotation of the transmission rod 4, but also reduce the shaking of the transmission rod 4 during movement, making the installation and movement of the transmission rod 4 and the sleeve 41 more stable.

[0038] Of course, in order to ensure better stability, in actual design, refer to Figure 2 , Figure 3, slideways 51 recessed in the inner sidewall of the channel 5 can be respectively provided in the four directions of the channel 5, and four bosses 43 corresponding to the slideways 51 are provided on the sleeve 41, and the bosses 43 are slidably connected in the slideways 51. In this way, the mutual cooperation between the bosses 43 and the slideways 51 can well limit the position of the sleeve 41 in multiple directions, thereby improving the stability of operation. In addition, the design of multiple bosses 43 can also reduce the wear between the side wall of the boss 43 and the side wall of the slideway 51 of the transmission rod 4 under the rotation trend of a single boss 43. When the wear of one boss 43 is too large, the other bosses 43 can also play a good limiting effect, and the transmission rod 4 will not shake due to the excessive wear of one boss 43, which can greatly improve the overall service life. In the actual process, the wear of multiple bosses is in a process of alternating wear (caused by the different fitting tolerances caused by the different sizes of the boss 43 and its corresponding slide 51 during the processing process). For example, the four bosses are numbered as A boss, B boss, C boss, and D boss. First, the side wall of the A boss fits with the side wall of its corresponding slide 51. During operation, the A boss is worn first. When the A boss is worn to a certain extent, the side wall of the B boss fits with the side wall of its corresponding slide 51, and the B boss is worn. At this time, the A boss is not worn, and so on. Only when all four bosses 43 are worn to a certain extent will the transmission rod 4 fail to move.

[0039] In order to further improve the stability of the operation of the transmission rod 4, an oil-containing bearing 6 supporting the transmission rod 4 is provided between the transmission rod 4 and the housing 1 in one embodiment of the present application. The oil-containing bearing 6 in this embodiment provides a support point for the transmission rod 4, and compared with the prior art, the transmission rod 4 is guided and supported, which reduces the impact of the installation gap or transmission vibration on the movement of the transmission rod 4, and improves the stability of the movement of the transmission rod 4. In addition, bearings 38 are provided at both ends of the gear shaft of the secondary bevel gear 34, so that the bearings 38 at both ends of the secondary bevel gear 34 can improve the stability of the bevel gear transmission, thereby providing greater thrust. Of course, the improved stability of the secondary bevel gear 34 can also reduce the shaking of the transmission rod 4 during transmission.

[0040] See attached Figure 4 The intermediate gear assembly of one embodiment of the present application includes an intermediate bevel gear 32 meshing with the primary worm 31 and an intermediate worm 33 meshing with the secondary bevel gear 34. The gear directions of the primary worm 31, the intermediate bevel gear 32, the intermediate worm 33, and the secondary bevel gear 34 are all right-handed. After force analysis, it is found that the right-handed helical structure of multiple transmission parts can offset the load force from the axial direction to a certain extent, so as to avoid the axial load borne by the teeth of the parts during the transmission process, reduce the fracture and failure of the gear teeth, and improve the service life of the parts.

[0041] To improve transmission efficiency, see Figure 5 The intermediate gear assembly of one embodiment of the present application further includes an intermediate gear shaft 35, on which an oil storage tank 36 is provided, and lubricating grease is stored in the oil storage tank 36. During operation, the lubricating grease reduces friction resistance, improves transmission efficiency and the service life of components.

[0042] The present application provides a first sealing ring 7 located on the outside of the oil-containing bearing 6 between the transmission rod 4 and the housing 1. During operation, since the transmission rod 4 needs to be frequently extended and retracted, impurities may adhere to its surface during the retraction process and enter the interior of the housing 1 along with the transmission rod 4. In addition, dust in the air and the like may also enter the interior of the housing 1 through the fitting gap between the transmission rod 4 and the housing 1, thereby affecting the normal operation of various components inside the housing 1. The provision of the first sealing ring 7 can improve the sealing of the overall structure and prevent impurities and dust from entering the interior of the housing 1 through the fitting gap between the transmission rod 4 and the housing 1. In actual settings, the number of first sealing rings 7 can be set as multiple as needed, and multiple first sealing rings 7 are distributed at intervals along the axial direction of the transmission rod 4, so that a multi-level / multi-layered sealing effect can be achieved. The specific first sealing ring 7 can select an O-type sealing ring, a YX-type sealing ring, or a YA-type sealing ring, etc.

[0043] See also Figure 2 , Figure 3 The shell 1 of one embodiment of the present application includes an upper shell 11 and a lower shell 12. This embodiment provides a split shell 1 structure. In actual production, the upper shell 11 and the lower shell 12 can be manufactured separately through molds, which can improve production efficiency.

[0044] Of course, the split structure of the shell 1 inevitably needs to take assembly issues into consideration. In order to facilitate the assembly of the split shell 1 structure, one embodiment of the present application sets a guide device between the upper shell 11 and the lower shell 12. The guide device includes a guide protrusion 13 set on the upper shell 11 and a guide groove 14 set on the lower shell 12. During assembly, the guide protrusion 13 of the upper shell 11 is embedded in the guide groove 14. It can be seen that the guide device in this embodiment not only plays a guiding role, but also helps to install and position the upper shell 11 and the lower shell 12, improve the accuracy of assembly, and thus improve the assembly efficiency. Combined with the accompanying drawings, it can be seen that the matching structure of the guide protrusion 13 and the guide groove 14 in this embodiment is also similar to the structure of the sealing ring, so that the guide device can also play a certain sealing effect. The guide protrusion 13 and the guide groove 14 in the present application are arranged in a circle in the circumferential direction of the upper shell 11 and the lower shell 12, which improves the sealing of the assembly of the upper shell 11 and the lower shell 12 in the circumferential direction, and ensures a good working environment inside the shell 1.

[0045] In other optional embodiments, the guide device may also be provided in other forms, for example, a structure in which a positioning stop and a positioning pin cooperate with each other is provided on the upper shell 11 and the lower shell 12 respectively.

[0046] For the split housing 1 structure, during assembly, the connection between the upper housing 11 and the lower housing 12 can be fixed by laser welding. During welding, full-circle welding can be used, so that the welding anchor point is longer, which can improve the overall sealing performance, make the upper housing 11 and the lower housing 12 body 1 firmly connected, and can withstand a large axial force of the helical gear. Of course, segmented welding can also be used for fixing. In this case, welding points can be added at the parts of the upper housing 11 and the lower housing 12 that are subjected to greater force (such as the installation part of the intermediate gear assembly) to achieve a better connection effect.

[0047] In other optional embodiments, the assembly connection of the upper shell 11 and the lower shell 12 can also be achieved by threaded connection. For example, connecting holes or connecting columns for threaded connection are respectively provided on the upper shell 11 and the lower shell 12, so that the connection between the upper shell 11 and the lower shell 12 is achieved by bolts passing through the connecting holes or connecting columns.

[0048] In one embodiment of the utility model, the primary worm 31 is made of metal material, the intermediate bevel gear 32 and the intermediate worm 33 are made of reinforced plastic, and the secondary bevel gear 34 is made of reinforced nylon; of course, the intermediate bevel gear 32 and the intermediate worm 33 can also be made of reinforced nylon, and the secondary bevel gear 34 is made of reinforced plastic, and of course other materials can be selected specifically. The intermediate bevel gear 32, the intermediate worm 33, and the secondary bevel gear 34 are made of non-metallic materials, which can not only reduce weight and cost, but also reduce noise during the transmission process. In addition, the gears or worms that mesh with each other are made of different materials, which can avoid the bonding phenomenon that may occur when the same materials mesh.

[0049] During specific assembly, the present application provides gaskets at both ends of the intermediate gear shaft 35. The provision of the gaskets can reduce friction during the operation of the components and improve transmission efficiency. Figure 1 In the present application, the intermediate gear assembly is arranged at an angle, and the inclined arrangement of the intermediate gear assembly can reduce the volume of the actuator.

[0050] In actual use, since a Hall magnetic ring is provided at one end of the output shaft of the driving motor 2 away from the primary worm 31, a PCB board is electrically connected to one side of the driving motor 2, and a Hall sensing module is provided at the position of the PCB board corresponding to the magnetic ring, when the direction of the current of the motor changes, the rotation direction of the output shaft of the motor changes, thereby changing the rotation direction of the input worm, so that the transmission rod 4 can achieve forward or backward linear motion in the channel 5. In order to facilitate the connection between the driving motor 2 and external accessories, such as a power supply, a wiring port is provided on the housing 1, and a second sealing ring is provided at the wiring port. The second sealing ring can improve the waterproof and dustproof performance of the wiring port to avoid affecting the operation of the driving motor 2 and the electronic components in the housing 1.

[0051] The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present application will be included in the scope of the claims.

Claims

1. A concealed electric door handle actuator, comprising a housing (1), a driving motor (2) installed in the housing (1), a gear transmission component and a transmission rod (4), wherein the gear transmission component comprises a primary worm (31), an intermediate gear assembly and a secondary helical gear (34), wherein the output shaft of the driving motor (2) is connected to the primary worm (31), the primary worm (31) is meshed with the intermediate gear, and the intermediate gear is meshed with the secondary helical gear (34), and wherein: A channel (5) is provided in the housing (1), a secondary bevel gear (34) is arranged at one end of the channel (5), a screw rod (37) is provided on the secondary bevel gear (34) and extends into the channel (5), at least one boss (43) is provided on the outer wall of the transmission rod (4) and is slidably connected to the channel (5) to limit the rotation of the transmission rod (4), and the transmission rod (4) includes an internal thread (44) that is threadably matched with the screw rod (37), so that the drive motor (2) can drive the transmission rod (4) to perform forward or backward linear motion in the channel (5) along its axial direction through the gear transmission component.

2. The hidden electric door handle actuator according to claim 1, characterized in that: The transmission rod (4) comprises a sleeve (41) and a push rod (42) connected to the sleeve (41); the internal thread (44) is arranged in the sleeve (41); an oil-containing bearing (6) supporting the push rod (42) is arranged between the push rod (42) and the housing (1); a guide section (52) cooperating with the sleeve (41) is formed in the channel (5); the inner side wall of the guide section (52) and the outer side wall of the sleeve (41) are in contact with each other; and bearings (38) are respectively arranged at both ends of the gear shaft of the secondary bevel gear (34).

3. The hidden electric door handle actuator according to claim 1, characterized in that: A first limiting platform (53) and a second limiting platform (54) are formed at both ends of the channel (5); the boss (43) has a first end face and a second end face; the first limiting platform (53) can abut the first end face to limit the position of the transmission rod (4) in forward movement; and the second limiting platform (54) can abut the second end face to limit the position of the transmission rod (4) in backward movement.

4. The hidden electric door handle actuator according to claim 1, characterized in that: The intermediate gear assembly comprises an intermediate bevel gear (32) meshing with the primary worm (31) and an intermediate worm (33) meshing with the secondary bevel gear (34); the primary worm (31), the intermediate bevel gear (32), the intermediate worm (33) and the secondary bevel gear (34) all have right-hand helical rotation directions.

5. The hidden electric door handle actuator according to claim 1 or 4, characterized in that: The intermediate gear assembly further comprises an intermediate gear shaft (35), and an oil storage tank (36) is provided on the intermediate gear shaft (35), wherein lubricating grease is stored in the oil storage tank (36).

6. The hidden electric door handle actuator according to claim 1, characterized in that: Slideways (51) recessed in the side walls of the channel (5) are respectively provided in four directions of the channel (5), and four bosses are provided on the sleeve (41), the bosses correspond to the slideways (51) one by one, and the bosses are slidably connected in the slideways (51).

7. The hidden electric door handle actuator according to claim 2, characterized in that: A first sealing ring (7) located outside the oil-containing bearing (6) is provided between the push rod (42) and the housing (1).

8. The hidden electric door handle actuator according to claim 1, characterized in that: The housing (1) comprises an upper shell (11) and a lower shell (12); a guide device is provided between the upper shell (11) and the lower shell (12); the guide device comprises a guide protrusion (13) provided on the upper shell (11) and a guide groove (14) provided on the lower shell (12); the upper shell (11) and the lower shell (12) are fixed by laser welding.

9. The hidden electric door handle actuator according to claim 5, characterized in that: The primary worm (31) is made of metal material, the intermediate bevel gear (32) and the intermediate worm (33) are made of reinforced plastic, the secondary bevel gear (34) is made of reinforced nylon, gaskets are provided at both ends of the intermediate gear shaft (35), and the intermediate gear assembly is arranged obliquely.

10. The hidden electric door handle actuator according to claim 1, characterized in that: The housing (1) is provided with a connection port for connecting the drive motor (2) to an external accessory, a second sealing ring is provided at the connection port, and a connector (8) connected to the drive motor (2) is provided at the connection port.

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