An electric actuator for a hidden door handle mechanism for a vehicle

Abstract

An electric actuator for a hidden door handle mechanism for a vehicle, comprising an output gear, a bearing, a shaft seal, a reducer, a DC motor, and an elastic sealing sleeve, wherein the output gear is fixed on the output shaft of the reducer, a cylindrical bearing, a shaft seal, and a cylindrical bearing are sequentially arranged in the inner hole of the output shaft end housing of the reducer, the DC motor is connected to the reducer via the motor output shaft, the elastic sealing sleeve is sleeved on the DC motor and the reducer housing, a wiring harness positioning sleeve is also arranged on the outer circle of the elastic sealing sleeve to fix the wiring harness, and the wiring harness passes through the elastic sealing sleeve to connect and conduct with the DC motor. The electric actuator of the present invention has good sealing and waterproofing effect, simple assembly, high production efficiency, low cost, and is also convenient for disassembly and maintenance.

Description

Technical Field

[0001] The invention relates to an electric actuator of a hidden door handle mechanism for a vehicle. Background Art

[0002] Since there is a possibility of water leakage at both the car side window glass and the hidden door handle, the electric actuator used in the hidden door handle mechanism must have a waterproof function. Otherwise, once water enters, the electric actuator will short-circuit and cause the hidden door handle mechanism to fail.

[0003] The existing waterproof structure of electric actuators is as follows: a housing and an end cover are welded together and then inserted into the motor and the reducer. The wiring harness consisting of the power line and the signal line of the motor is sealed by glue filling at the wiring harness outlet, and the entire circumference of the housing opening end face and the reducer housing are coated with glue. This waterproof structure has the disadvantages of complex production process, low production efficiency and high cost, and is also inconvenient to disassemble and maintain. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an electric actuator for a hidden door handle mechanism for a vehicle in view of the existing technical situation, which is easy to produce and convenient to disassemble.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: an electric actuator of a hidden door handle mechanism for a vehicle, which includes an output gear, a bearing, a shaft seal, a reducer, a DC motor, and an elastic sealing sleeve. The output gear is fixed on the output shaft of the reducer, and a cylindrical bearing, a shaft seal and a cylindrical bearing are sequentially arranged in the inner hole of the output shaft end housing of the reducer. The DC motor is connected to the reducer through the motor output shaft, and the elastic sealing sleeve is sleeved on the DC motor and the reducer housing. A wire harness positioning sleeve is also arranged on the outer circle of the elastic sealing sleeve to fix the wire harness, and the wire harness passes through the elastic sealing sleeve to connect and conduct with the DC motor.

[0006] Better yet, an arc sealing lip is arranged on the inner side of the shaft seal to seal with the output shaft, and a concave arc lip is arranged on the water side. When the water pressure increases, the clamping force of the arc sealing lip on the output shaft can be increased, thereby increasing the waterproof pressure. A convex arc lip is arranged on the water-free side to ensure that the arc sealing lip has sufficient strength. The upper end face and the lower end face are arranged to be positioned with the cylindrical bearings on both sides of the shaft seal, and the outer cylindrical surface is arranged to be sealed with the inner hole of the shell of the planetary gear reducer. Such a structure has better sealing.

[0007] Preferably, a harness hole is arranged on the outer circumferential surface of the closed end of the elastic sealing sleeve and a sealing ring is arranged inside the harness hole. The sealing section of the harness passes through the harness hole and is sealed by the sealing ring, so that the sealing effect is better.

[0008] Preferably, an air tightness detection hole is provided on the end face of the elastic sealing sleeve, and a sealing plug is provided to seal the air tightness detection hole, and an air flow channel is provided on the inner wall of the elastic sealing sleeve to the planetary gear reducer housing, so that the reduction gear can be sealed and detected.

[0009] Preferably, a sealing portion is provided on the wall of the air tightness detection hole, a guiding arc is provided on the end face of the sealing plug, which plays a guiding role when inserted into the air tightness detection hole, and an anti-slip ring is provided to cooperate with the positioning surface of the elastic sealing sleeve to prevent the sealing plug from falling off.

[0010] More specifically, the reducer is a planetary gear reducer, a sun gear is arranged on the motor shaft of the DC motor, and the sun gear is meshed with the planetary gears of the planetary gear reducer.

[0011] Preferably, the reducer includes a shell and a reducer end cover, the shell is fixed to the reducer end cover, and a sound-absorbing and noise-reducing hole is arranged on the end surface of the reducer end cover, so as to reduce the noise of the reducer.

[0012] Preferably, the sound-absorbing and noise-reducing hole mouth and the bottom are respectively provided with an arc-shaped bell mouth and an elliptical countersunk hole surface, so that the sound-absorbing effect is better.

[0013] Preferably, the other end of the planetary gear reducer housing fits with the bottom surface of the reducer end cover, the planetary gear reducer housing is connected and fixed to the reducer end cover, and the reducer end cover is connected and fixed to the end surface of the DC motor, and such a connection has good sealing performance.

[0014] Preferably, the wire harness positioning sleeve is integrated with the elastic sealing sleeve, which can save the need for separate production of the wire harness positioning sleeve parts and also save the need for assembly, thus helping to reduce costs.

[0015] Compared with the prior art, the advantages of the present invention are: a shaft seal is arranged on the output shaft of the planetary gear reducer of the electric actuator for waterproof sealing, and an elastic sealing sleeve is arranged outside the DC motor and the planetary gear reducer to form a seal with the DC motor, the outside of the planetary gear reducer and the wiring harness for waterproofing, and the sealing and waterproofing effect is good, the assembly is simple, the production efficiency is high, the cost is low, and it is also convenient for disassembly and maintenance.

[0016] An air tightness detection hole is also provided on the elastic sealing sleeve and a corresponding sealing plug is provided for sealing, so that the air tightness detection of the electric actuator can be performed and the requirement of sealing the entire electric actuator can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an electric actuator of a hidden door handle mechanism for a vehicle according to an embodiment of the present invention.

[0018] Figure 2It is a schematic diagram of an exploded view of an electric actuator of a hidden door handle mechanism for a vehicle according to an embodiment of the present invention.

[0019] Figure 3 The present invention is a schematic diagram of the structure of an electric actuator of a hidden door handle mechanism for a vehicle according to an embodiment of the present invention.

[0020] Figure 4a , 4b It is a schematic structural diagram of a shaft seal according to an embodiment of the present invention.

[0021] Figure 5a , 5b 5c is a schematic diagram of the structure of the reducer end cover according to an embodiment of the present invention.

[0022] Figure 6a , 6b , 6c, 6d, and 6e are schematic structural diagrams of the elastic sealing sleeve according to an embodiment of the present invention.

[0023] Figure 7 It is a schematic structural diagram of a sealing plug according to an embodiment of the present invention.

[0024] Figure 8 It is a schematic structural diagram of a wiring harness positioning sleeve according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the embodiments of the accompanying drawings.

[0026] like Figure 1-8 As shown, an electric actuator of a hidden door handle mechanism for a vehicle includes a snap ring gasket 10, an output gear 20, an open retaining ring 30, an output gasket 40, a cylindrical bearing 50, a shaft seal 60, a cylindrical bearing 70, a planetary gear reducer 80, a cylindrical pin 90, a reducer end cover 100, a sun gear 110, a bolt 120, a DC motor 130, an elastic sealing sleeve 140, a sealing plug 150, a wiring harness positioning sleeve 160 and a wiring harness 170.

[0027] A cylindrical bearing 50, a shaft seal 60 and a cylindrical bearing 70 are sequentially arranged in the inner hole of the planetary gear reducer housing 802 at the output shaft 801 end of the planetary gear reducer 80. The outer circles of the cylindrical bearings 50 and the cylindrical bearings 70 are fixed in the inner hole of the housing 802. The inner circles slide and rub against the surface of the output shaft 801 and support the output shaft 801. The shaft seal 60 forms a waterproof sealing structure with the output shaft 801 and the housing 802 respectively.

[0028] The housing 802 is also provided with a mounting threaded hole 8021 through which the housing 802 is mounted to a location of use.

[0029] An output gasket 40 is arranged on the output shaft 801 of the planetary gear reducer 80 , and an open retaining ring 30 is arranged in the groove of the output shaft 801 to limit the output shaft 801 .

[0030] An output gear 20 is also provided on the output shaft 801 for outputting torque of the electric actuator, and a retaining ring gasket 10 is provided in another groove of the output shaft 801 for limiting the output gear 20 .

[0031] A sun gear 110 is arranged on the motor shaft 1301 of the DC motor 130, and the sun gear is meshed with the planetary gear of the planetary gear reducer to transmit the torque of the DC motor 130 to the planetary gear reducer 80, and the reducer end cover 100 is connected and fixed to the end face of the DC motor 130 by bolts 120, and the other end of the housing 802 of the planetary gear reducer 80 is fitted with the bottom surface of the reducer end cover 100, and a cylindrical pin 90 is arranged to connect and fix the housing 802 of the planetary gear reducer 80 to the reducer end cover 100.

[0032] An elastic sealing sleeve 140 is arranged outside the connected and fixed DC motor 130 and planetary gear reducer 80 for waterproof sealing. A sealing plug 150 is arranged on the end face of the elastic sealing sleeve 140, and a wiring harness positioning sleeve 160 is arranged on the outer circle to fix the wiring harness 170. The wiring harness 170 passes through the elastic sealing sleeve 140 and is connected and conducted with the DC motor 130.

[0033] Figure 4a is a three-dimensional diagram of the shaft seal 60, Figure 4b As a cross-sectional diagram, an arc sealing lip 601 is arranged on the inner side of the shaft seal 60 to form a waterproof sealing structure with the output shaft 801; a concave arc lip 602 is arranged on the water side to increase the clamping force of the arc sealing lip 601 on the output shaft 801 when the water pressure increases, thereby increasing the waterproof pressure; a convex arc lip 603 is arranged on the water-free side to ensure that the arc sealing lip 601 has sufficient strength; an upper end face 606 and a lower end face 604 are arranged to be positioned with the cylindrical bearings 50 and 70 on both sides of the shaft seal 60; an outer cylindrical surface 605 is arranged to form a waterproof sealing structure with the inner hole of the housing 802 of the planetary gear reducer 80.

[0034] Figure 5a is a three-dimensional diagram of the reducer end cover 100, Figure 5b For its top view, Figure 5c for Figure 5bIn the HH cross-sectional view, a positioning hole 1005 is arranged at the center of the reducer end cover 100 to cooperate with the motor stop 1303 for positioning, so as to ensure the concentricity of the DC motor 130 and the planetary gear reducer 80; a cylindrical pin hole 1004 is arranged on the outer circle, and the planetary gear reducer 80 is connected and fixed thereto by a cylindrical pin 90; a sound-absorbing and noise-reducing hole 1001 is arranged on the end face, and an arc-shaped flare 1002 and an elliptical countersunk surface 1003 are arranged at the mouth and bottom of the sound-absorbing and noise-reducing hole 1001 respectively, so as to play a role in sound absorption and noise reduction.

[0035] Figure 6a is a three-dimensional diagram of the elastic sealing sleeve 140, Figure 6b For its top view, Figure 6c for Figure 6b EE partial cross-section enlarged view, Figure 6d is a schematic structural diagram of the elastic sealing sleeve 140, Figure 6e for Figure 6d FF sectional view, the elastic sealing sleeve 140 is provided with a sealing ring 1401 at the inner hole of the open end, and forms a waterproof sealing structure with the housing 802 of the planetary gear reducer 80, and a guide arc 14012, a fixing groove 1402 and an anti-rotation card 14011 are respectively provided on the outer cylindrical surface, which are used for assembly guidance, axial limit and circumferential limit of the wiring harness positioning sleeve 160, and a wiring harness hole 1407 is provided on the outer cylindrical surface of the closed end, and a sealing ring 1408 is provided inside the wiring harness hole 1407, which is used for the wiring harness 170 to pass through and cooperate with the sealing section 1701 of the wiring harness 170 to form a waterproof sealing structure, see Figure 1 .

[0036] An air tightness detection hole 1403 is set at the closed end, a sealing ring 1408 is set inside the air tightness detection hole 1403, a positioning surface 1404 and an air inlet groove 1406 are set on the end face, and a ventilation groove 1409 is set on the inner hole surface of the elastic sealing sleeve 140. The air inlet pipe and the sealing ring 1401 are tested to form a seal to prevent air leakage. High-pressure gas enters from the air inlet groove 1406 and enters the housing 802 of the planetary gear reducer 80 through the ventilation groove 1409 for air tightness detection. A positioning platform 14010 is also set on the inner side surface of the closed end of the elastic sealing sleeve 140 to perform axial positioning on the DC motor 130.

[0037] like Figure 7 As shown, the end face of the sealing plug 150 is provided with a guiding arc 1501, which is inserted into the air tightness detection hole 1403 of the elastic sealing sleeve 140 to play a guiding role, an anti-slip ring 1502 is provided to cooperate with the positioning surface 1404 of the elastic sealing sleeve 140 to prevent the sealing plug 150 from falling off, and a cylindrical surface 1503 and a sealing ring 1405 of the air tightness detection hole 1403 are provided to form a waterproof sealing structure.

[0038] like Figure 8As shown, the wiring harness positioning sleeve 160 is provided with a mounting hole 1601, which is embedded in the fixing groove 1402 of the elastic sealing sleeve 140 and axially limited, and a positioning surface 1603 is provided, and a positioning hole 1602 is provided to cooperate with the fixing section 1702 of the wiring harness 170, and the fixing section 1702 passes through the positioning hole 1602, and the positioning hole 1602 fixes the wiring harness 170, see Figure 1 .

Claims

1. An electric actuator for a hidden door handle mechanism for a vehicle, characterized in that: It includes an output gear, a bearing, a shaft seal, a reducer, a DC motor, and an elastic sealing sleeve. The output gear is fixed on the output shaft of the reducer. A cylindrical bearing, a shaft seal, and a cylindrical bearing are arranged in sequence in the inner hole of the output shaft end housing of the reducer. The DC motor is connected to the reducer through the motor output shaft. The elastic sealing sleeve is sleeved on the DC motor and the reducer housing. A wiring harness positioning sleeve is also arranged on the outer circle of the elastic sealing sleeve to fix the wiring harness. The wiring harness passes through the elastic sealing sleeve and is connected and conducted with the DC motor. An arc sealing lip is arranged on the inner side of the shaft seal to connect with the output shaft. Sealing, a concave arc lip is set on the water side, a convex arc lip is set on the waterless side, the upper end face and the lower end face are positioned with the cylindrical bearings on both sides of the shaft seal, and the outer cylindrical surface is sealed with the inner hole of the planetary gear reducer housing; a wiring harness hole is set on the outer cylindrical surface of the closed end of the elastic sealing sleeve, and a sealing ring is set on the inner side of the wiring harness hole, and the sealing section of the wiring harness passes through the wiring harness hole and is sealed by the sealing ring; an airtightness detection hole is set on the end face of the elastic sealing sleeve, and a sealing plug is set to seal the airtightness detection hole, and an air flow channel is set on the inner wall of the elastic sealing sleeve to the planetary gear reducer housing.

2. The electric actuator of the hidden door handle mechanism for a vehicle as claimed in claim 1, characterized in that: A sealing portion is arranged on the wall of the air tightness detection hole, a guiding arc is arranged on the end face of the sealing plug, which plays a guiding role when inserted into the air tightness detection hole, and an anti-slip ring is arranged to cooperate with the positioning surface of the elastic sealing sleeve.

3. The electric actuator of the hidden door handle mechanism for a vehicle as claimed in claim 1, characterized in that: The reducer is a planetary gear reducer, a sun gear is arranged on the motor shaft of the DC motor, and the sun gear is meshed with the planetary gears of the planetary gear reducer.

4. The electric actuator of the hidden door handle mechanism for a vehicle as claimed in claim 1, characterized in that: The reducer comprises a shell and a reducer end cover. The shell is fixed to the reducer end cover, and a sound-absorbing and noise-reducing hole is arranged on the end surface of the reducer end cover.

5. The electric actuator of the hidden door handle mechanism for a vehicle as claimed in claim 4, characterized in that: The sound-absorbing and noise-reducing hole mouth and the bottom are respectively provided with an arc-shaped bell mouth and an elliptical countersunk hole surface.

6. The electric actuator of the hidden door handle mechanism for a vehicle as claimed in claim 3, characterized in that: The other end of the planetary gear reducer housing is fitted with the bottom surface of the reducer end cover, the planetary gear reducer housing is connected and fixed to the reducer end cover, and the reducer end cover is connected and fixed to the end surface of the DC motor.

7. The electric actuator of the hidden door handle mechanism for a vehicle as claimed in claim 1, characterized in that: The wire harness positioning sleeve is integrated with the elastic sealing sleeve.

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