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CN-224229203-U - Dynamic waterproof structure of LPP actuator

CN224229203UCN 224229203 UCN224229203 UCN 224229203UCN-224229203-U

Abstract

The utility model discloses a dynamic waterproof structure of an LPP actuator, which comprises a shell, a driving motor and a lifting shaft, wherein the driving motor and the lifting shaft are arranged in the shell, a locking piece is connected on an output shaft of the driving motor in a transmission way, the lifting shaft is in a freely lifting movable state and a locking state locked in the shell, the driving motor drives the locking piece to move towards a direction close to or far away from the lifting shaft, so that the lifting shaft is switched between the movable state and the locking state, a watertight cavity for accommodating the lifting shaft is arranged in the shell, the lifting movement of the lifting shaft drives the volume of the watertight cavity to correspondingly change in the movable state, and a vent is arranged in the watertight cavity and is covered with a waterproof and breathable film.

Inventors

  • Huang Senrong
  • JIA RONGBO

Assignees

  • 宁波华楷电子科技有限公司

Dates

Publication Date
20260512
Application Date
20260306

Claims (10)

  1. 1. The utility model provides a LPP executor developments waterproof construction, includes casing (1), and set up driving motor (2) and lift axle (3) in casing (1), wherein on the output shaft transmission of driving motor (2) is connected with locking piece (4), lift axle (3) have the active condition of freely going up and down, and lock in the locked condition of casing (1), driving motor (2) drive locking piece (4) towards being close to or keep away from the direction displacement of lift axle (3), make lift axle (3) are in active condition and the switch between the locked condition, be provided with in casing (1) and hold watertight chamber (5) of lift axle (3) under the active condition, the lift motion of lift axle (3) drives watertight chamber (5) volume takes place corresponding change, watertight chamber (5) are provided with air vent (51), air vent (51) seal has waterproof ventilated membrane (52).
  2. 2. The dynamic waterproof structure of the LPP actuator of claim 1, wherein the air vent (51) is formed by a plurality of air vents (511) distributed in a circumferential array, and the waterproof air-permeable membrane (52) is covered on the end surface where the air vents (511) are located.
  3. 3. The dynamic waterproof structure of the LPP actuator, as set forth in claim 1, is characterized in that the housing (1) is provided with a lifting opening (11) for the lifting shaft (3) to extend out, and a sealing member (6) in sealing connection with the lifting shaft (3) is circumferentially arranged on the lifting opening (11).
  4. 4. The dynamic waterproof structure of the LPP actuator of claim 3, wherein the lifting opening (11) is provided with a sealing groove (111) for accommodating the sealing element (6), the sealing groove (111) is close to the groove wall of the lifting shaft (3) to form a step part (112), and part of the sealing element (6) is arranged on the step part (112) and is in sealing abutting connection with the lifting shaft (3).
  5. 5. A dynamic waterproof structure for an LPP actuator according to claim 3, wherein said housing (1) is provided with a sealing port (12) corresponding to the position of said locking member (4), said sealing member (6) extends in the direction of said sealing port (12) and covers said sealing port (12), said sealing port (12) having an open state and a closed state with respect to said sealing member (6).
  6. 6. The dynamic waterproof structure of the LPP actuator of claim 5, wherein the locking piece (4) is provided with a positioning block (41) extending out of the sealing opening (12), the sealing piece (6) is provided with a positioning groove (61) for accommodating the positioning block (41), and the positioning groove (61) restricts a displacement path of the locking piece (4) in a direction perpendicular to a transmission direction.
  7. 7. The dynamic waterproof structure of the LPP actuator of claim 1, wherein a clamping seat (7) is arranged at one end, close to the locking piece (4), of the lifting shaft (3), a clamping tooth (42) extending towards the clamping seat (7) is arranged on the locking piece (4), a clamping groove (71) corresponding to the clamping tooth (42) in position is formed in the clamping seat (7), and the clamping groove (71) is clamped with the clamping tooth (42).
  8. 8. The dynamic waterproof structure of the LPP actuator of claim 7, wherein one end of the clamping seat (7) extends into the lifting shaft (3) and forms a matching part (72), a first limit groove (721) is formed in the periphery of the matching part (72), a limit block (722) is arranged on the first limit groove (721), a second limit groove (31) for accommodating the limit block (722) is formed in the inner wall of the lifting shaft (3), and the limit block (722) is arranged in the second limit groove (31) and abuts against the first limit groove (721) so that the clamping seat (7) is fixedly connected with the lifting shaft (3).
  9. 9. The dynamic waterproof structure of the LPP actuator, as set forth in claim 7, characterized in that the housing (1) is formed with a first fixed shaft (13) extending toward the inside thereof, the first fixed shaft (13) is inserted into the clamping seat (7), a first elastic member (131) abutted to the clamping seat (7) is sleeved on the first fixed shaft (13), a second fixed shaft (14) is fixedly connected on the first fixed shaft (13), a hollow cavity (15) for accommodating the second fixed shaft (14) is formed in the lifting shaft (3), a second elastic member (141) is arranged in the hollow cavity (15), and the second elastic member (141) is sleeved on the second fixed shaft (14) and abuts against the lifting shaft (3).
  10. 10. The dynamic waterproof structure of the LPP actuator, which is disclosed in claim 1, is characterized in that a micro switch (8) is arranged in the shell (1), a clamping strip (32) is fixedly arranged on the lifting shaft (3), when the lifting shaft (3) is pressed down by the outside to move, the clamping strip (32) is locked on the micro switch (8), and when the lifting shaft (3) is pressed up by the outside to move, the clamping strip (32) is released from the micro switch (8).

Description

Dynamic waterproof structure of LPP actuator Technical Field The utility model relates to the technical field of linear actuators, in particular to a dynamic waterproof structure of an LPP actuator. Background With the development of the intellectualization and the electrodynamic performance of automobiles, various electronic actuators, such as linear actuators (LPP actuators) for systems such as automatic tail gates, electric sunroofs, charging flaps, active air intake grilles, etc., are increasingly used in vehicles. These actuators are usually installed on the outside of a vehicle or in a wading area, and the working environment is complex and variable, which makes extremely high demands on waterproof and dustproof properties. At present, a common waterproof actuator mostly adopts a static sealing mode, for example, a sealing ring is arranged at a joint of a shell, an oil seal or an O-shaped ring is adopted at an axial extension part, however, when the lifting shaft of the actuator extends outwards, the volume of an internal watertight cavity of the actuator is instantaneously increased, so that the air pressure in the cavity is instantaneously lower than the atmospheric pressure of the external environment, negative pressure is formed, and under the action of the negative pressure, the traditional static sealing structure actively sucks external liquid (water, oil mist and the like) into the actuator through a tiny gap or a sealing lip, so that waterproof failure is caused. Disclosure of utility model The utility model aims to provide a dynamic waterproof structure of an LPP actuator, which not only can realize the driving and locking of a lifting shaft, but also can fundamentally eliminate the instantaneous internal and external pressure difference generated when the lifting shaft moves dynamically, thereby blocking the path of water sucked and realizing reliable dynamic waterproof. The technical aim of the utility model is achieved through the following technical scheme that the dynamic waterproof structure of the LPP actuator comprises a shell, a driving motor and a lifting shaft, wherein the driving motor and the lifting shaft are arranged in the shell, a locking piece is connected to an output shaft of the driving motor in a transmission mode, the lifting shaft is in a freely lifting movable state and locked in the locking state of the shell, the driving motor drives the locking piece to displace towards a direction approaching to or far away from the lifting shaft, so that the lifting shaft is switched between the movable state and the locking state, a watertight cavity for accommodating the lifting shaft is arranged in the shell, the lifting movement of the lifting shaft drives the volume of the watertight cavity to correspondingly change in the movable state, an air vent is arranged in the watertight cavity, and the air vent is covered with a waterproof and breathable film. By adopting the technical scheme, when the lifting shaft moves, the volume of the watertight cavity changes, external air can smoothly enter and exit through the waterproof breathable film, negative pressure or positive pressure resistance is avoided, smooth movement is ensured, and the waterproof breathable film can effectively prevent liquid water, dust and the like from entering the inside of the shell, so that long-term reliable protection is realized under dynamic working conditions. The utility model is further provided that the vent is formed by a plurality of vent holes distributed in a circumferential array, and the waterproof breathable film is covered on the end face where the vent holes are located. Through adopting above-mentioned technical scheme, increased the effective area of breathing freely of waterproof ventilated membrane, make the inside and outside air pressure of cavity reach balance more fast, the array overall arrangement also helps the air current to evenly pass through, avoids stress concentration, prolongs the life of waterproof ventilated membrane, has taken into account simultaneously that the structure is pleasing to the eye and protection efficiency. The utility model is further characterized in that the shell is provided with a lifting opening for the lifting shaft to extend out, and a sealing piece in sealing connection with the lifting shaft is circumferentially arranged on the lifting opening. By adopting the technical scheme, the key movement gap of the lifting shaft extending out of the shell is effectively closed, external liquid and pollutants are directly prevented from penetrating into the shell along the surface of the lifting shaft, and the sealing reliability of the integral structure is enhanced. The lifting shaft is further provided with a sealing groove for accommodating the sealing element, a step part is formed on the sealing groove close to the groove wall of the lifting shaft, and part of the sealing element is arranged on the step part and is in sealing abutting connection