CN111827811A

CN111827811A - Linear motion actuator for automobile hidden handle

Info

Publication number: CN111827811A
Application number: CN202010723072.4A
Authority: CN
Inventors: 仇名伟; 贾荣波; 戚汝权
Original assignee: Ningbo Huakai Electronic Technology Co ltd
Current assignee: Ningbo Huakai Electronic Technology Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2020-10-27

Abstract

A linear motion actuator for a hidden handle of an automobile, comprising: the power supply device comprises a shell, a first cavity, a second cavity and a third cavity, wherein the shell is provided with a power connection port and an output port; a drive mechanism disposed in the first chamber; the output screw rod is arranged in the third chamber and can extend out of the shell through the output port; the transmission mechanism at least comprises an input worm, a duplicate gear and an output nut seat which are in transmission connection in sequence, the duplicate gear is obliquely arranged in the second cavity and is provided with a bevel gear part and a transmission worm part which is integrally arranged with the bevel gear part, the output nut seat is sleeved on the output screw, and the output nut seat is provided with an internal thread and an output bevel gear. The transmission mechanism of the actuator adopts a two-stage worm type transmission structure, thereby realizing the direction changing effect on the output force of the motor, namely converting the rotation action of the motor into the linear reciprocating action of the output screw rod, and having stable transmission and low noise.

Description

Linear motion actuator for automobile hidden handle

Technical Field

The invention relates to the application field of electric actuators, in particular to a linear motion actuator for a hidden handle of an automobile.

Background

The conventional automobile outer door handle is basically manual, after a user unlocks a door lock signal, the user holds the handle to open the automobile door under the action of pulling force, the manual handle is connected with the automobile door through a manual elastic mechanical device, and the manual handle needs to be exposed on the surface of the automobile door in order to be pulled open by an operator, so that dust is easily attached to the handle, and the problems of wind resistance and the like during high-speed driving are also solved.

In order to solve the above problems, some manufacturers have introduced a hidden type automobile outer handle. The hidden type automobile outer handle generally has three states, namely an initial hidden state, a pre-unfolding state and a fully unfolding state. When the automobile outer handle is used, the electronic lock is unlocked through a key generally, the automobile computer gives an instruction at the moment, the automobile outer handle is pushed out from a hidden state to a pre-unfolding state through the actuator, then a user can hold and pull the automobile outer handle to enable the automobile outer handle to be switched from the pre-unfolding state to a fully unfolding state, and meanwhile, the mechanical lock is unlocked and the automobile door is opened.

However, in general, the volume of the whole vehicle is unchanged or reduced when the exposed door handle is replaced by the hidden outer handle, and the number of parts is increased, so that an actuator which is compact in rhythm, small in volume, light in weight, reliable and silent in use is urgently needed to smoothly realize the pushing-out and hiding functions of the automobile outer handle.

Disclosure of Invention

In order to overcome the above-mentioned disadvantages of the prior art, the present invention provides a linear actuator for hidden handles of automobiles, which is mainly applied to automobile body systems, especially doors, as a power actuator for driving hidden door handles, and is intended to have the advantages of small size, light weight, reliable operation and silence, and at the same time, effectively prevent dust and rain from invading, and have a longer service life.

The technical scheme for solving the technical problem is as follows: a linear motion actuator for a hidden handle of an automobile, comprising:

the power supply device comprises a shell, a first cavity, a second cavity and a third cavity, wherein the shell is provided with a power connection port and an output port, the interior of the shell is provided with a mounting cavity, the mounting cavity is divided into the first cavity, the second cavity and the third cavity which are mutually communicated, the first cavity is communicated with the power connection port, and the third cavity is communicated with the output port;

a drive mechanism disposed in the first chamber and configured to provide power;

the output screw rod is arranged in the third chamber and can extend out of the shell through the output port so as to linearly reciprocate along the axis direction of the output screw rod and realize power output;

the transmission mechanism at least comprises an input worm, a dual gear and an output nut seat which are in transmission connection with each other from front to back, wherein the input worm is connected with the output end of the driving mechanism, the dual gear is obliquely arranged in the second chamber, the dual gear is provided with a bevel gear part meshed with the input worm and a transmission worm rod part meshed with the output nut seat and integrally arranged with the bevel gear part, the output nut seat is sleeved on the output screw, and the output nut seat is provided with an internal thread in threaded connection with the output screw and an output bevel gear arranged on the outer wall of the output nut seat and meshed with the transmission worm part.

Preferably, the output screw rod sequentially comprises a sliding block section, a threaded section and an output section from front to back, the output section can extend out of the shell through the output port, the threaded section is connected with an internal thread in the output nut seat, a sliding groove is further arranged in the third chamber, the length of the sliding groove is larger than that of the sliding block section, limiting ribs are arranged at the front end and the rear end of the sliding groove, and the sliding block section is arranged in the sliding groove in a sliding mode and forms limiting fit with the limiting ribs.

Preferably, the slider section comprises a square slider body and guide limit blocks convexly arranged on four side walls of the slider body, limit grooves are concavely arranged on the four side walls of the sliding groove, and the guide limit blocks are slidably arranged in the limit grooves.

Preferably, a gear shaft is further obliquely arranged in the second cavity, the duplicate gear is sleeved on the gear shaft, and the central axis of the gear shaft is overlapped with the central axis of the duplicate gear.

Preferably, the driving mechanism is a motor, a metal bushing is sleeved on an output shaft of the motor, the input worm is located between the metal bushing and a main body of the motor, and limiting gaskets are arranged at two ends of the output shaft of the motor.

Preferably, the power distribution device further comprises a sheath, a first O-shaped sealing ring, a second O-shaped sealing ring and a telescopic sealing sleeve, wherein the sheath is sleeved on the power connection port, the first O-shaped sealing ring is sleeved in the sheath, the second O-shaped sealing ring is sleeved on the output screw rod, and the telescopic sealing sleeve is sleeved on the output port.

Preferably, the front end and the rear end of the output nut seat are respectively sleeved with a sliding bearing, and a bearing hole matched with the bearing is formed in the third chamber.

Preferably, the cavity wall of the first cavity is convexly provided with a plurality of first supporting ribs, and the driving mechanism is abutted against the first supporting ribs.

Preferably, a plurality of second support ribs are convexly arranged on the groove wall of the sliding groove, and the sliding block section is abutted to the second support ribs.

Preferably, the housing comprises an upper cover and a lower cover, the upper cover is convexly provided with a positioning buckle, the lower cover is provided with a positioning clamping groove, the positioning buckle is inserted into the positioning clamping groove, and the upper cover and the lower cover are fixed together through laser welding.

The invention has the beneficial effects that:

1. the transmission mechanism of the actuator adopts the matching of the input worm, the duplicate gear and the output nut seat to form a two-stage worm type transmission structure, thereby realizing the direction changing effect on the output force of the motor, namely converting the rotation action of the motor into the linear reciprocating action of the output screw, and having stable transmission and low noise.

2. The dual gears and the gear shafts are obliquely arranged, and are matched with a two-stage worm type transmission mode, so that the transmission is smoother, the integral arrangement of the actuator is more compact, and the design purpose of miniaturization is realized.

3. Two sliding bearings are arranged on the output nut seat, so that the transmission efficiency can be effectively improved, and the actuator has larger driving force.

4. Through the setting of metal bush and spacing gasket, play and support and limiting displacement well to the motor output shaft for the motor operates steadily, and executor output is reliable.

5. The casing adopts upper cover and lower cover laser welding's mode to constitute, simultaneously through the setting of seal assembly such as sheath, first O type sealing washer, second O type sealing washer and flexible seal cover, can improve the waterproof dustproof performance of each port, and then ensures that casing internal environment is not influenced, guarantees that whole operation that can be stable for a long time is used.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an internal assembly schematic of the present invention.

Fig. 3 is an exploded view of the present invention.

Fig. 4 is a top view of the present invention.

Fig. 5 is a sectional view taken along the line a-a in fig. 4.

Fig. 6 is a sectional view taken along line B-B in fig. 4.

Fig. 7 is a schematic structural view of the lower cover.

Fig. 8 is a schematic structural view of the upper cover.

Fig. 9 is a schematic structural view of the duplicate gear.

Fig. 10 is a schematic view of the structure of the output screw.

Fig. 11 is a schematic view of the structure of the output nut seat.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 11, a linear actuator for a hidden handle of a vehicle includes:

the power supply device comprises a shell 1, a first cavity 4, a second cavity 5 and a third cavity 6, wherein the shell 1 is provided with a power connection port 2 and an output port 3, the interior of the shell 1 is provided with a mounting cavity, the mounting cavity is divided into the first cavity 4, the second cavity 5 and the third cavity 6 which are mutually communicated, the first cavity 4 is communicated with the power connection port 2, and the third cavity 6 is communicated with the output port 3;

a drive mechanism provided in the first chamber 4 and for providing power;

an output screw 8 arranged in the third chamber 6, wherein the output screw 8 can extend out of the shell 1 through the output port 3 so as to linearly reciprocate along the axis direction of the output screw and realize power output;

the transmission mechanism at least comprises an input worm 9, a dual gear 10 and an output nut seat 11 which are in transmission connection with each other from front to back, wherein the input worm 9 is connected with the output end of the driving mechanism, the dual gear 10 is obliquely arranged in the second chamber 5, the dual gear 10 is provided with a helical gear part 12 meshed with the input worm 9 and a transmission worm rod part 13 meshed with the output nut seat 11 and integrally arranged with the helical gear part 12, the output nut seat 11 is sleeved on the output screw 8, and the output nut seat 11 is provided with an internal thread 14 in threaded connection with the output screw 8 and an output helical gear 15 arranged on the outer wall of the output nut seat 11 and meshed with the transmission worm rod part 13.

Preferably, the inclination angle between the duplicate gear 10 and the housing 1 is 155 to 165 degrees, and the angle is controlled within the numerical range, so that a stable transmission effect can be ensured, and related components can be more compactly arranged.

The embodiment provides a structure of a preferable output screw 8, which integrates the functions of power input and output, guiding and limiting, and the like, and the specific structure is as follows: the output screw 8 sequentially comprises a sliding block section 16, a threaded section 17 and an output section 18 from front to back, the output section 18 can extend out of the shell 1 through the output port 3, the threaded section 17 is connected with an internal thread 14 in the output nut seat 11, a sliding groove 19 is further arranged in the third chamber 6, the length of the sliding groove 19 is larger than that of the sliding block section 16, limiting ribs 20 are arranged at the front end and the rear end of the sliding groove 19, and the sliding block section 16 is arranged in the sliding groove 19 in a sliding mode and forms limiting fit with the limiting ribs 20. When the screw rod type sliding block is used, the sliding block section 16 plays a role in guiding limit, the threaded section 17 plays a role in power input, the output section 18 plays a role in power output, and the front and rear limiting ribs 20 are arranged to limit the front and rear sliding distance of the sliding block section 16, namely, the whole output screw rod 8 is effectively limited in the front and rear direction.

In order to achieve better guiding and limiting effects, the slider section 16 includes a square slider body 21 and guiding limiting blocks 22 convexly arranged on four side walls of the slider body 21, limiting grooves 23 are concavely arranged on the four side walls of the sliding groove 19, and the guiding limiting blocks 22 are slidably arranged in the limiting grooves 23. Approximately, namely, the cross sections of the sliding block section 16 and the sliding groove 19 are both cross-shaped, so that the person can achieve good limiting effect in four directions, namely, up, down, left and right.

In this embodiment, a gear shaft 24 is further obliquely arranged in the second chamber 5, the duplicate gear 10 is sleeved on the gear shaft 24, and a central axis of the gear shaft 24 coincides with a central axis of the duplicate gear 10. By adopting the structural arrangement of the embodiment, the dual gear 10 and the gear shaft 24 are both arranged in a coaxial inclined manner, so that the clearance between related parts can be reduced, the local volume is smaller, and the layout is more compact. Preferably, the gear shaft 24 is made of a metal material, so that the gear shaft has higher strength and meets the operation requirement of the dual gear 10 under complex working conditions.

Preferably, the driving mechanism is a motor 7, and the motor 7 is a product with mature technology, can convert electric energy into mechanical energy, and is widely applied to various large scenes.

However, the motor 7 inevitably shakes during use, and if the motor is not processed, various abnormal sounds may occur to the whole actuator, which seriously affects normal use. In order to solve the above-mentioned defects, in particular, a metal bush 26 is sleeved on the output shaft 25 of the motor 7, the input worm 9 is located between the metal bush 26 and the main body of the motor 7, and both ends of the output shaft 25 of the motor 7 are provided with a limit gasket 27. Through the setting of spacing gasket 27, carry out effectively spacingly to the output shaft 25 both ends of motor 7, through the setting of metal bush 26, provide sufficient support to motor 7 output shaft 25, and then make whole motor 7 must operate more steadily, executor output is more reliable and more stable, and the holistic volume of noise that significantly reduces.

Furthermore, a plurality of first supporting ribs 28 are convexly arranged on the cavity wall of the first cavity 4, and the motor 7 is abutted against the first supporting ribs 28. The first support ribs 28 are preferably arranged in a staggered manner. Through the arrangement of the first support rib 28, firstly, the contact area between the motor 7 and the shell 1 can be reduced, so that the vibration caused by the operation of the motor 7 is reduced to be transmitted to the whole shell 1 as much as possible; secondly, the stress is more uniform due to the transverse and longitudinal staggering, and a better supporting effect is achieved.

In this embodiment, the power distribution device further includes a sheath 29, a first O-ring 30, a second O-ring 31 and a telescopic gland 32, the sheath 29 is sleeved on the power connection port 2, the first O-ring 30 is sleeved in the sheath 29, the second O-ring 31 is sleeved on the output screw 8, and the telescopic gland 32 is sleeved on the output port 3. Through the setting of seal fittings such as sheath 29, first O type sealing washer 30, second O type sealing washer 31 and flexible seal cover 32, can improve the waterproof dustproof performance of each port, and then ensure that the internal environment of casing 1 is not influenced, guarantee that whole operation that can be stable for a long time is used.

Preferably, sliding bearings 33 are sleeved at the front end and the rear end of the output nut seat 11, and a bearing hole 34 matched with the bearing is formed in the third chamber 6. Through the sliding bearing 33 arranged on the output nut seat 11, the friction force and energy loss generated in the operation process can be reduced, so that the transmission efficiency is improved, the actuator has larger push-out force, meanwhile, the abrasion of accessories can be reduced, and the service life is prolonged. Because the output nut seat 11 and the duplicate gear 10 are in a unique matching mode, namely the rotating direction of the output nut seat and the duplicate gear needs to be changed in the transmission process, the output nut seat and the duplicate gear can receive the acting force compounded in a plurality of directions, and the arrangement of the bearing hole 34 can play a good limiting role on the sliding bearing 33, prevent the sliding bearing from being separated from a station due to the stress, and ensure the stable operation of related parts.

In order to provide a certain supporting function for the sliding block, a plurality of second supporting ribs 35 are convexly arranged on the groove wall of the sliding groove 19, and the sliding block section 16 is abutted against the second supporting ribs 35. In practical use, the second support rib 35 and the first support rib 28 function similarly, so that the contact area between the slider section 16 and the casing 1 can be reduced, and the transmission of the jitter caused by the operation of the slider section 16 to the whole casing 1 can be reduced as much as possible.

The embodiment provides a preferred structure of the housing 1, so as to be convenient for installation and use, and specifically comprises: the shell 1 comprises an upper cover 36 and a lower cover 37, wherein a positioning buckle 38 is convexly arranged on the upper cover 36, a positioning clamping groove 39 is arranged on the lower cover 37, the positioning buckle 38 is inserted into the positioning clamping groove 39, and the upper cover 36 and the lower cover 37 are fixed together through laser welding. Through the cooperation of location buckle 38 and positioning slot 39, can play prepositioning and the effect of preinstallation to upper cover 36 and lower cover 37, rethread laser welding is fixed upper cover 36 with lower cover 37 to can assemble housing 1 that has good dustproof and waterproof performance. Preferably, the edge of the lower cover 37 is further provided with a circle of positioning ribs 40, and the edge of the upper cover 36 is provided with positioning grooves 41 matched with the positioning ribs 40.

The working principle of the invention is as follows: and the electric connection port 2 of the actuator is connected with the whole vehicle wiring harness of the vehicle, so that the motor 7 is electrified and controlled.

The motor 7 is started and the motor 7 rotates forwards, the output shaft 25 of the motor 7 drives the input worm 9 to rotate forwards synchronously, then the input worm 9 drives the whole duplex gear 10 to rotate forwards by taking the gear shaft 24 as a rotation center through the matching with the helical gear part 12 on the duplex gear 10, then the worm part 13 on the duplex gear 10 is driven to be matched with the output helical gear 15 on the output nut seat 11 to drive the output nut seat 11 to rotate forwards, finally the output screw 8 is driven to rotate forwards and is linearly pushed out from the output port 3 through the matching of the internal thread 14 of the output nut seat 11 and the output screw 8, and the movement stroke of the output screw 8 is limited through the matching of the sliding block section 16 and the limiting rib 20.

Similarly, the motor 7 is driven and the motor 7 is rotated reversely, the output shaft 25 of the motor 7 drives the input worm 9 to rotate reversely synchronously, then the input worm 9 drives the whole dual gear 10 to rotate reversely by taking the gear shaft 24 as a rotation center through the matching with the helical gear part 12 on the dual gear 10, then the transmission worm part 13 on the dual gear 10 is matched with the output helical gear 15 on the output nut seat 11 to drive the output nut seat 11 to rotate reversely, and finally the output screw 8 is driven to rotate reversely and retract linearly from the output port 3 through the matching of the internal thread 14 of the output nut seat 11 and the output screw 8.

The various principle methods adopted are all based on the prior art. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.

Claims

1. A linear actuator for a hidden handle of a vehicle, comprising:

2. The linear motion actuator for a hidden handle of an automobile of claim 1, wherein: the output screw rod comprises a sliding block section, a threaded section and an output section in sequence from the front to the back, the output section can extend out of the shell through the output port, the threaded section is connected with an internal thread in the output nut seat, a sliding groove is further arranged in the third chamber, the length of the sliding groove is larger than that of the sliding block section, limiting ribs are arranged at the front end and the back end of the sliding groove, and the sliding block section is arranged in the sliding groove in a sliding mode and forms limiting fit with the limiting ribs.

3. The linear motion actuator for a hidden handle of an automobile of claim 2, wherein: the slider section includes the slider body of square and protruding direction stopper of establishing on four lateral walls of slider body, all concave spacing grooves that are equipped with on four lateral walls of spout, the direction stopper establish in the spacing groove cunning.

4. The linear motion actuator for a hidden handle of an automobile of claim 2, wherein: the second cavity is also obliquely provided with a gear shaft, the duplicate gear is sleeved on the gear shaft, and the central axis of the gear shaft is coincided with the central axis of the duplicate gear.

5. The linear motion actuator for a hidden handle of an automobile of claim 1, wherein: the driving mechanism is a motor, a metal bushing is sleeved on an output shaft of the motor, the input worm is positioned between the metal bushing and a main body of the motor, and limiting gaskets are arranged at two ends of the output shaft of the motor.

6. The linear motion actuator for a hidden handle of an automobile of claim 1, wherein: the power distribution box is characterized by further comprising a sheath, a first O-shaped sealing ring, a second O-shaped sealing ring and a telescopic sealing sleeve, wherein the sheath is sleeved on the power connection port, the first O-shaped sealing ring is sleeved in the sheath, the second O-shaped sealing ring is sleeved on the output screw rod, and the telescopic sealing sleeve is sleeved on the output port.

7. The linear motion actuator for a hidden handle of an automobile of claim 1, wherein: the front end and the rear end of the output nut seat are respectively sleeved with a sliding bearing, and a bearing hole matched with the bearing is formed in the third chamber.

8. The linear motion actuator for a hidden handle of an automobile of claim 1, wherein: the cavity wall of the first cavity is convexly provided with a plurality of first supporting ribs, and the driving mechanism is abutted to the first supporting ribs.

9. The linear motion actuator for a hidden handle of an automobile of claim 2, wherein: and a plurality of second supporting ribs are convexly arranged on the groove wall of the sliding groove, and the sliding block section is abutted with the second supporting ribs.

10. The linear actuator for a hidden handle in a vehicle according to any one of claims 1 to 9, wherein: the shell comprises an upper cover and a lower cover, wherein a positioning buckle is convexly arranged on the upper cover, a positioning clamping groove is formed in the lower cover, the positioning buckle is inserted into the positioning clamping groove, and the upper cover and the lower cover are fixed together through laser welding.