CN209964451U

CN209964451U - Shell cover structure of electronic actuator

Info

Publication number: CN209964451U
Application number: CN201920569936.4U
Authority: CN
Inventors: 傅华盛
Original assignee: Hella Xiamen Electronic Device Co Ltd
Current assignee: Hella Xiamen Electronic Device Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-01-17
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses an electronic actuator's cap structure, the inner of cap has the screw that carries out the fixing to the motor, and this cap corresponds the position of screw is equipped with the screw hole that corresponds, and the cap is equipped with the bleeder vent with external intercommunication in each screw hole bottom. The utility model discloses set up the screw hole on electronic actuator's cap, the screw hole is corresponding with the screw, still set up the bleeder vent with screw hole and outside atmosphere intercommunication on the cap, can reduce inside and outside atmospheric pressure difference through the bleeder vent, the atmospheric pressure that produces can be guaranteed to screw and bleeder vent intercommunication when last cap and cap welding can carry out the pressure release through screw hole and bleeder vent, play and reduce inside and outside atmospheric pressure difference, and can arouse inside external pressure because of the change of temperature when electronic actuator normally works and play a buffering stress effect to the welding face.

Description

Shell cover structure of electronic actuator

Technical Field

The present invention relates to an electronic actuator, and more particularly to a cover structure of an electronic actuator for an automobile.

Background

The conventional electronic actuator for a vehicle generally comprises a driving motor, a gear system or a return spring system, an output shaft system and a position sensing system.

Fig. 1 and 2 are schematic structural views of a conventional electronic actuator. Its existing electronic actuator includes: the motor assembly 10 comprises a motor 101 and a fixing plate 102, wherein the motor 101 and the fixing plate 102 are fixed on the lower casing cover 70 through screws 103. The gear assembly 20 includes a plurality of gear members 201, each gear member 201 is mounted between the upper casing cover 60 and the lower casing cover 70 through a gear rotating shaft 202; the output shaft assembly 30 includes a bearing, a rotating shaft, and a rotating pin; the lower case cover 70 has a plurality of mounting holes for fixing the electronic actuator to the vehicle using bolts; the upper housing cover 60 integrates a wire harness interface for connection to a wire harness.

At present, the upper shell cover 60 and the lower shell cover 70 are welded together by laser, the upper shell cover 60 is a material which can transmit laser, and the lower shell cover 70 is a material which cannot transmit laser, so that the energy of the laser can be gathered on the contact surface between the upper shell cover 60 and the lower shell cover 70, and the plastic of the upper shell cover 60 and the plastic of the lower shell cover 70 are fused and combined together at high temperature to play roles of jointing and sealing. However, when laser welding, a large amount of heat can be generated, the internal air pressure of a sealed product is greatly improved, the overlarge pressure can cause a laser welding surface to be propped open in the solidification process, welding can be completed only by lowering the temperature inside through the pressure maintaining of outside machinery and the like, the welding quality of the product can be guaranteed, and the production period of the product is overlong. Meanwhile, the change of the internal air pressure caused by the change of the temperature in the working period of the product can generate certain stress on the welding surface, so that the service life of the electronic actuator is shortened or the electronic actuator fails.

In order to solve the problem, as shown in fig. 3, the original technical solution is to specially design an air vent 80 on the upper shell cover 60 or the lower shell cover 70, and attach a ventilation layer 90 made of a ventilation material on the surface of the air vent 80, wherein the ventilation material is required to be only permeable to air but not permeable to liquid, such as water. This design is complex and requires complex fabrication processes and additional material costs.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, and provide a can reduce inside and outside air pressure difference's electronic actuator's cap structure, guarantee when last cap and cap welding, the atmospheric pressure of production can carry out the pressure release to reduce inside and outside air pressure difference.

In order to achieve the above purpose, the solution of the present invention is:

the shell cover structure of the electronic actuator is characterized in that screws for fixing a motor are arranged at the inner end of the shell cover, corresponding screw holes are formed in the positions, corresponding to the screws, of the shell cover, and air holes communicated with the outside are formed in the bottom of each screw hole of the shell cover.

Preferably, the diameter of the air holes is less than or equal to 1.5 mm.

Preferably, the perforation length of the air holes is more than or equal to two times of the diameter value of the air holes.

Preferably, a gap is formed between the air hole and the bottom of the screw.

Preferably, the length of a gap between the upper part of the air hole and the bottom surface of the screw is the same as the length of a through hole of the air hole.

Preferably, the screw is a self-tapping screw.

After the structure of the oil adding device is adopted, the utility model discloses set up the screw hole on electronic actuator's cap, the screw hole is corresponding with the screw, the shell is covered still to set up the bleeder vent with screw hole and outside atmosphere intercommunication, can reduce inside and outside atmospheric pressure difference through the bleeder vent, the atmospheric pressure that produces can be guaranteed to screw and bleeder vent intercommunication can carry out the pressure release through screw hole and bleeder vent when last cap and cap welding, play and reduce inside and outside atmospheric pressure difference, and can arouse inside external pressure because of the change of temperature when electronic actuator normally works and play a buffering stress effect to the welding face. The utility model discloses a cap setting can reduce the outside atmospheric pressure difference in the electronic actuator behind the screw hole assembly self tapping screw of atmosphere intercommunication, has guaranteed waterproof dirt-proof requirement simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of a conventional electronic actuator.

Fig. 2 is a partial structural schematic diagram of a conventional electronic actuator.

Fig. 3 is a schematic structural view of a conventional electronic actuator with air vents.

Fig. 4 is a schematic view of the structure of the lower casing of the electronic actuator of the present invention.

Fig. 5 is a schematic sectional view of the lower case cover of the electronic actuator of the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

The utility model discloses a component parts of electronic actuator preferred embodiment are the same with the component parts of current structure, refer to fig. 1, and electronic actuator includes motor element 10, gear assembly 20, output shaft assembly 30, sensor circuit board 40, anti EMC circuit board 50, goes up cap 60 and lower cap 70, and gear assembly 20 sets up in lower cap 70, goes up cap 60 fixed sensor circuit board 40 and anti EMC circuit board 50, and output shaft assembly 30 passes through upper cap 60 tight fit on gear assembly 20.

As shown in fig. 4 and 5, the key point of the present invention is that the inner end of the lower housing cover 70 is fixed to the motor 101 by a fixing plate 102 and fixed by two screws 103, so as to prevent the motor 101 from vibrating and falling off. The lower case cover 70 is provided with two screw holes 71 at positions corresponding to the screws, as shown in fig. 4, the lower case cover 70 is provided with air holes 72 at the bottoms of the screw holes 71 to communicate with the outside, and a gap 73 is formed between the air holes 72 and the bottoms of the screws 103.

As shown in FIG. 5, the diameter of the air hole 72

It must be small enough and less than 1.5mm for optimum effect.

The length L1 of the perforation of the air hole 72 must be enough, and L1 is larger than the diameter

Number two timesThe best effect is achieved.

The length L2 of the gap 73 between the upper side of the air hole 72 and the bottom surface of the screw 103 is the same as the length L1 of the through hole of the air hole, which has the best effect.

The two screws 103 are self-tapping screws and can fix the motor 101 and the fixing piece 102.

The utility model discloses set up two screw holes 71 on electronic actuator's lower casing 70, two screw holes 71 are corresponding with the self tapping screw 103 of fixed motor 101 and stationary blade 102, still set up the bleeder vent 72 with screw hole 71 and outside atmosphere intercommunication on the lower casing 70, can reduce inside and outside atmospheric pressure difference through bleeder vent 72, there is clearance 73 between bleeder vent 72 and the screw hole 71 and can guarantee that the atmospheric pressure that produces can carry out the pressure release through this screw hole 71 and bleeder vent 72 when upper casing cover 60 and lower casing 70 weld, play and reduce inside and outside atmospheric pressure difference, and can arouse the effect that inside external pressure plays a buffering stress to the welding face because of the change of temperature when electronic actuator normally works. The utility model discloses a lower casing cover 70 sets up behind the screw hole 71 assembly self tapping screw 103 with the atmosphere intercommunication, can reduce the inside and outside atmospheric pressure difference of electronic actuator, has guaranteed waterproof dirt-proof requirement simultaneously.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.

Claims

1. A shell cover structure of an electronic actuator is characterized in that: the inner of the shell cover is provided with a screw for fixing the motor, the position of the shell cover corresponding to the screw is provided with a corresponding screw hole, and the bottom of each screw hole of the shell cover is provided with a vent hole communicated with the outside.

2. A cover structure for an electronic actuator according to claim 1, wherein: the diameter of the air holes is less than or equal to 1.5 mm.

3. A cover structure of an electronic actuator according to claim 1 or 2, wherein: the perforation length of the air holes is more than or equal to two times of the diameter value of the air holes.

4. A cover structure for an electronic actuator according to claim 1, wherein: and a gap is formed between the air hole and the bottom of the screw.

5. A cover structure for an electronic actuator according to claim 4, wherein: the length of a gap between the upper part of the air hole and the bottom surface of the screw is the same as the length of a through hole of the air hole.

6. A cover structure for an electronic actuator according to claim 1, wherein: the screw is a self-tapping screw.