CN111541337A

CN111541337A - Air pressure compensation electronic actuator

Info

Publication number: CN111541337A
Application number: CN202010439956.7A
Authority: CN
Inventors: 周韧; 程家鑫; 马俊杰; 陈小栋
Original assignee: Fenghong Haili Auto Technology Kunshan Co ltd
Current assignee: Fenghong Haili Auto Technology Kunshan Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-08-14

Abstract

The invention discloses an air pressure compensation electronic actuator, which comprises: a housing comprising a first shell, a first end cap, and a second end cap; the first end cover and the second end cover are respectively arranged on two sides of the first shell; a first accommodating cavity and a second accommodating cavity are formed in the first shell, and the first accommodating cavity is communicated with the second accommodating cavity through a first through hole; the first end cover is provided with a second through hole and a third through hole; the motor is arranged in the first accommodating cavity, a transmission shaft of the motor extends into the second accommodating cavity through the first through hole, and the second end cover is matched with the first shell to fix the motor in the first shell; and the gear assembly is arranged in the second accommodating cavity and comprises a first gear, a second gear, a third gear, a fourth gear, a fifth gear and a sixth gear. It is small in size, light in weight and applicable to an electronic actuator of a variable geometry turbocharger. It is small in size, light in weight and capable of performing air pressure compensation.

Description

Air pressure compensation electronic actuator

Technical Field

The invention relates to the field of electronic actuators, in particular to an air pressure compensation electronic actuator.

Background

The conventional turbocharger with an electronic actuator controls the intake pressure by adjusting the opening amount of the waste gate valve, which requires a high torque for the electronic actuator.

In order to meet corresponding requirements, the size, weight, power consumption and the like of the traditional electronic actuator are relatively high.

Compared with the conventional turbocharger, the variable geometry turbocharger adjusts the output of the turbocharger by changing the inflow angle and speed of the turbine intake air, so that the response time and acceleration capability of the engine at low rotation speed are improved.

Disclosure of Invention

In order to overcome the defects in the prior art, embodiments of the present invention provide an air pressure compensation electronic actuator, which is small in size, light in weight, and capable of performing air pressure compensation.

In order to achieve the above object, an embodiment of the present application discloses an air pressure compensation electronic actuator, including:

a housing comprising a first shell, a first end cap, and a second end cap; the first end cover and the second end cover are respectively arranged on two sides of the first shell; a first accommodating cavity and a second accommodating cavity are formed in the first shell, and the first accommodating cavity is communicated with the second accommodating cavity through a first through hole; the first end cover is provided with a second through hole and a third through hole;

the motor is arranged in the first accommodating cavity, a transmission shaft of the motor extends into the second accommodating cavity through the first through hole, and the second end cover is matched with the first shell to fix the motor in the first shell;

a gear assembly disposed within the second receiving cavity, the gear assembly including a first gear, a second gear, a third gear, a fourth gear, a fifth gear, and a sixth gear; the first gear is in transmission connection with a transmission shaft of the motor, the first gear is meshed with the second gear, the second gear and the third gear are coaxially arranged through a first rotating shaft, the third gear is meshed with the fourth gear, the fourth gear and the fifth gear are coaxially arranged through a second rotating shaft, and the fifth gear is meshed with the sixth gear; the sixth gear is in transmission connection with an output shaft; the output shaft penetrates through the first end cover through the second through hole.

Preferably, the wall surface of the first through hole is provided with a plurality of third bumps which are uniformly arranged, and the third bumps are used for fixing the motor.

Preferably, the sixth gear is a sector gear.

Preferably, an airtight bearing is arranged on the output shaft, the output shaft is connected with the first end cover through the airtight bearing, the airtight bearing is arranged on the first end cover in an interference pressing mode, and the output shaft is in clearance fit with the airtight bearing.

Preferably, one end of the motor abuts against the inner wall between the first accommodating cavity and the second accommodating cavity, the other end of the motor abuts against the second end cover, and a supporting plate and a damping elastic sheet are sequentially arranged between the second end cover and the motor.

Preferably, be equipped with a plurality of installation department on the first casing, be equipped with a plurality of mounting hole on the installation department, be equipped with the bolt sleeve in the mounting hole.

Preferably, a plurality of first bumps are uniformly arranged on the periphery of a third through hole of the first end cover, a second bump is further arranged on the third through hole, the second bump is connected with each first bump, and the first bumps are not in contact with the third through hole; and a breathable film is arranged in the third through hole on the first end cover.

Preferably, the air pressure compensation electronic actuator further comprises a connecting plate, a fourth through hole is formed in the connecting plate, and the connecting plate is sleeved on the output shaft exposed out of the first end cover through the fourth through hole.

Preferably, the air pressure compensation electronic actuator further comprises a plug assembly, the plug assembly comprises a plug outer shell and a plug pin, the plug is surgically arranged on the first shell, the plug pin is arranged in the second accommodating cavity, and the plug assembly is electrically connected with the motor.

Preferably, the second gear has an outer diameter larger than an outer diameter of the fourth gear, and the third gear has an outer diameter larger than an outer diameter of the fifth gear.

The invention has the following beneficial effects: the gear is arranged in a laminated mode, the installation parts are arranged on two sides of the shell, the installation parts on the two sides are in the structural range of the shell, and meanwhile, the motor with a smaller size is used, so that the size of the electronic actuator is finally reduced, and the weight of the electronic actuator is further reduced; the breathable film is breathable and impermeable and is used for air pressure compensation of high and low temperature changes. In addition, the third through hole is shielded by the first lug and the second lug when the automobile is seen from the shell or the end cover, the breathable film is directly flapped by splash of the wheels in the running process of the automobile due to invisible third through holes in appearance, and the breathable holes cannot be seen when the automobile is seen from the vertical position of the appearance in the breathable structure, so that the breathable film is prevented from being broken by people by mistake.

In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an air pressure compensation electronic actuator according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first end cap and a connecting plate of an air pressure compensation electronic actuator according to an embodiment of the invention;

FIG. 3 is a schematic diagram of the gear assembly and pins of the pneumatic compensation electronic actuator according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first housing of an air pressure compensating electronic actuator in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first accommodating cavity and a first through hole of a first housing of the air pressure compensation electronic actuator according to the embodiment of the invention;

FIG. 6 is a schematic diagram of the configuration of the motor and the second end cap of the first housing of the air pressure compensating electronic actuator in an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a third through-hole in the first end cap of the air pressure compensating electronic actuator in accordance with an embodiment of the present invention;

FIG. 8 is an exploded view of a pressure compensated electronic actuator in accordance with an embodiment of the present invention;

reference numerals of the above figures:

1. a first housing; 11. a first accommodating chamber; 12. a first through hole; 13. a third bump; 14. a second accommodating chamber; 15. an installation part; 16. mounting holes; 17. a bolt bushing;

2. a first end cap; 21. a second through hole; 22. a third through hole; 23. a first bump; 24. a second bump; 25. a gas permeable membrane;

3. a second end cap; 31. a support plate; 32. a shock absorbing spring plate;

4. a motor; 41. a drive shaft;

5. a gear assembly; 51. a first gear; 52. a second gear; 53. a third gear; 54. a fourth gear; 55. a fifth gear; 56. a sixth gear; 57. a first rotating shaft; 58. a second rotating shaft; 59. an output shaft;

6. a connecting plate; 61. a fourth via hole;

7. a plug housing; 71. inserting a pin;

8. a magnet; 81. sensor with a sensor element

9. And an airtight bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

In order to achieve the above purpose, the present invention discloses an electronic actuator, which is applied to a variable geometry turbocharger and can meet the torque output requirement of the variable geometry turbocharger.

Referring to fig. 8, in the present embodiment, the air pressure compensation electronic actuator includes a housing, a motor 4 and a gear assembly 5.

Further, referring to fig. 1, the housing includes a first casing 1, a first end cap 2 and a second end cap 3, the first end cap 2 is disposed at an upper end of the first casing 1, and the second end cap 3 is disposed at a lower end of the first casing 1.

It will be appreciated that in this embodiment, the first and

second end caps

2 and 3 are laser welded to the first housing 1, making the housing overall stronger.

Further, referring to fig. 2, a second through hole 21 and a third through hole 22 are disposed on the first end cap 2, the second through hole 21 is used for accommodating the output shaft 59, and a first bump 23 and a second bump 24 are disposed on the third through hole 22.

Further, referring to fig. 7, the first bumps 23 are uniformly disposed along the periphery of the third through hole 22, the second bumps 24 are disposed above the third through hole 22, the second bumps 24 are connected to each of the first bumps 23, and the third through hole 22 is welded with a breathable film 25.

In this embodiment, the number of the first bumps 23 is 6.

It will be appreciated that the membrane 25 is permeable to air and water and is used for pressure compensation for high and low temperature changes. In addition, the third through hole 22 is shielded by the first bump 23 and the second bump 24 when viewed from the outside of the shell or the end cover, the third through hole 22 cannot be seen in appearance, and water splash splashed by wheels in the running process of the automobile is prevented from directly beating the breathable film 25.

In addition, the vent holes can not be seen at the vertical position of the appearance of the vent structure, thereby avoiding the product from being punctured by a needle by people by mistake to break the vent film 25

Further, referring to fig. 3, the gear assembly 5 includes a first gear 51 in transmission connection with the transmission shaft 41 of the motor 4, a second gear 52 engaged with the first gear 51, a third gear 53 coaxially connected with the second gear 52 through a first rotating shaft 57, a fourth gear 54 engaged with the third gear 53, a fifth gear 55 connected with the fourth gear 54 through a second rotating shaft 58, and a sixth gear 56 engaged with the fifth gear 55, wherein an output shaft 59 is in transmission link with the sixth gear 56, and the output shaft 59 is used for outputting torque.

It will be appreciated that by stacking the gears of the gear assembly 5, the electronic actuator is reduced in size in the transverse direction (in practice, the electronic actuator is positioned transversely as shown in fig. 1), further reducing the weight of the electronic actuator.

It is understood that in the present embodiment, the outer diameter dimension of the second gear 52 is larger than the outer diameter dimension of the fourth gear 54, and the outer diameter dimension of the third gear 53 is larger than the outer diameter dimension of the fifth gear 55. The sixth gear 56 is a sector gear, and the end surface of the sixth gear 56 contacting the first end cap 2 is recessed inwardly to form a groove portion for receiving a part of the length of the output shaft 59.

It is understood that, in the present embodiment, the first gear 51 is press-fitted onto the transmission shaft 41 of the motor 4 by interference fit, and the first gear 51 is manufactured by powder metallurgy.

Further, referring to fig. 8, the output shaft 59 is disposed through the first end cap 2 via a second through hole 21, and an airtight bearing 9 is disposed between the output shaft 59 and the second through hole 21.

It will be appreciated that in this embodiment, the airtight bearing 9 is press-fitted onto the first end cap 2 with interference, and the output shaft 59 is clearance-fitted to the airtight bearing 9.

Further, referring to fig. 4, a second accommodating cavity 14 is formed at the upper end of the first casing 1, the second accommodating cavity 14 is used for accommodating the gear assembly 5, two limiting holes are formed in the second accommodating cavity 14, and one ends of the first rotating shaft 57 and the second rotating shaft 58 are respectively arranged in the limiting holes in an interference manner.

Be equipped with installation department 15 on the first casing 1, be equipped with mounting hole 16 on the installation department 15, be equipped with the bolt sleeve 17 that is used for additional strengthening in the mounting hole 16.

The first housing 1 is further provided with a pin 71 shell for accommodating the pin 71.

Further, referring to fig. 5, a first accommodating cavity 11 is further disposed on the first housing 1, the first accommodating cavity 11 is connected to a second accommodating cavity 14 through a first through hole 12, a plurality of third bumps 13 are disposed on an inner wall surface of the first through hole 12, and the third bumps 13 are used for clamping the transmission shaft 41 of the motor 4.

Further, referring to fig. 6, the motor 4 is disposed in the first accommodating cavity 11, and the transmission shaft 41 of the motor 4 enters the second accommodating cavity 14 through the first through hole 12.

Further, referring to fig. 8, the second end cap 3 covers the lower portion of the first housing 1, and the second end cap 3 covers the motor 4 in the second accommodating cavity 14.

Further, referring to fig. 6, a supporting plate 31 and a shock absorbing elastic sheet 32 are disposed between the motor 4 and the second end cap 3, and the supporting plate 31 cooperates with the shock absorbing elastic sheet 32 and the third bump 13 to fix and limit the motor 4.

It is understood that, in the present embodiment, the motor 4 is a dc brush motor 4.

Further, referring to fig. 2, a fourth through hole 61 is formed in the connecting plate 6, the connecting plate 6 is sleeved on a section of the output shaft 59 extending out of the first end cover 2, and the connecting plate 6 is sleeved on the output shaft 59 through the fourth through hole 61.

In the present embodiment, the connecting plate 6 is connected to the output shaft 59 by laser welding, and the connecting plate 6 is formed by stainless steel stamping.

Further, referring to fig. 8, the electronic actuator further includes a magnet 8, the magnet 8 is coaxially disposed with the sixth gear 56 through the output shaft 59, and the magnet 8 is disposed below the sixth gear 56, so that on one hand, the position control precision can be improved, and on the other hand, the internal structure arrangement can be more compact.

In the embodiment, the sixth gear 56 is integrally injection-molded with the output shaft 59 and the magnet 8, wherein the sixth gear 56 and the output shaft 59 are injection-molded in a spline form, and the magnet 8 is made of a high-performance neodymium-iron-boron material and has high-temperature resistance.

Further, referring to fig. 8, the electronic actuator further includes a sensor 81 mounted and fixed on the first housing 1 and located below the magnet 8.

In this embodiment, the sensor 81 is fixed on the first housing 1 by glue, the sensor 81 is a position sensor 81, the position sensor 81 is preferably a 3D hall effect sensor 81, and the sensor 81 has an EMC module inside, which can meet the requirements of electromagnetic compatibility and precise position control, and can provide error diagnosis information.

Further, referring to fig. 8, the electronic actuator further includes a plug assembly, which includes a plug housing 7 and pins 71.

It can be understood that, in the present embodiment, the plug housing 7 is integrally formed on the first housing 1 by injection molding, the pins 71 are disposed on the housing, and one end of the pins 71 is disposed in the plug housing 7, and the other end is disposed in the second accommodating cavity 14, and the end is electrically connected to the motor 4 and the position sensor 81 through a wire harness.

In this embodiment, the wiring harness and the pins 71 are both injection-molded on the first housing 1, which effectively prevents the pins 71 from falling off.

In this embodiment, the electronic actuator further includes a controller, the plug is electrically connected to the controller, and the controller can control the electronic actuator to operate through the plug.

The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An air pressure compensated electronic actuator, comprising:

2. The air pressure compensation electronic actuator according to claim 1, wherein the wall surface of the first through hole is provided with a plurality of uniformly arranged third protrusions, and the third protrusions are used for fixing the motor.

3. The air pressure compensating electronic actuator of claim 1, wherein the sixth gear is a sector gear.

4. The air pressure compensation electronic actuator of claim 1, wherein the output shaft is provided with an airtight bearing, the output shaft is connected with the first end cover through the airtight bearing, the airtight bearing is press-fitted on the first end cover in an interference manner, and the output shaft is in clearance fit with the airtight bearing.

5. The air pressure compensation electronic actuator according to claim 1, wherein one end of the motor abuts against an inner wall between the first accommodating chamber and the second accommodating chamber, the other end of the motor abuts against the second end cap, and a support plate and a shock absorption elastic sheet are sequentially arranged between the second end cap and the motor.

6. The air pressure compensating electronic actuator of claim 1, wherein the first housing defines a plurality of mounting portions, the mounting portions defining a plurality of mounting holes, the mounting holes defining bolt sleeves.

7. The air pressure compensation electronic actuator according to claim 1, wherein a plurality of first bumps are uniformly arranged on the periphery of the third through hole of the first end cap, a second bump is arranged on the third through hole, the second bump is connected with each first bump, and the first bumps are not in contact with the third through hole; and a breathable film is arranged in the third through hole on the first end cover.

8. The air pressure compensation electronic actuator of claim 1, further comprising a connecting plate, wherein a fourth through hole is formed in the connecting plate, and the connecting plate is sleeved on the output shaft exposed out of the first end cover through the fourth through hole.

9. The air pressure compensated electronic actuator of claim 1, further comprising a plug assembly including a plug housing and a pin, the plug being surgically disposed on the first housing, the pin being disposed within the second receiving cavity, the plug assembly being electrically connectable to the motor.

10. The air pressure compensating electronic actuator of claim 1, wherein the second gear has an outer diameter dimension that is greater than an outer diameter dimension of the fourth gear, and the third gear has an outer diameter dimension that is greater than an outer diameter dimension of the fifth gear.