Gear actuator for electronic throttle valve

Abstract

The utility model discloses a gear execution mechanism of electronic throttle valve, include: motor, casing and gear drive assembly, motor and gear drive assembly all set up in casing, and the valve piece assembly body module is detachably connected with casing through bolt, and the output end of gear drive assembly is connected with motor, and the valve piece of valve piece assembly body module is driven connection through valve rod and gear drive assembly. Through the application of the utility model, a kind of gear execution mechanism of electronic throttle valve is presented, which cancels the redundant bidirectional spring return mechanism and the limping position structure in traditional electronic throttle valve, and combines single-path position signal chip to replace high-cost bidirectional position sensor. It is not only beneficial to reduce the hardware procurement, mold development and production management cost of electronic throttle valve body, but also can still meet the air intake adjustment demand under the full working condition of engine under the premise of simplifying structure, adapt to the design trend of lightweight and high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electronic throttle technology, and in particular to a gear actuator for an electronic throttle. Background Technology

[0002] The electronic throttle body is a core component of the intake system of a range-extender engine. It regulates the intake air volume by driving the valve plate opening, thereby controlling the engine's operating conditions. In existing technologies, electronic throttle bodies generally employ a two-way spring return mechanism with a limp-position feature, combined with a DC motor and a two-way position sensor to achieve valve plate actuation and position sensing.

[0003] However, the original intention of the above structural design was to meet the safety redundancy requirements of traditional fuel engines under complex operating conditions. When applied to range-extended engines, it has a significant "over-design" problem: On the one hand, the working scenarios of range-extended engines are relatively simple, and the safety redundancy functions of limp position and bidirectional spring return mechanism cannot play a practical role, but increase the number of parts and assembly complexity; on the other hand, the high cost of bidirectional position sensors further increases the overall cost of range-extended engine systems, and the redundant structural design does not bring about an improvement in operating condition adaptability, which does not meet the design requirements of lightweight and low cost of range-extended engines. Utility Model Content

[0004] In view of this, in order to solve the above problems, the purpose of this utility model is to provide a gear actuator for an electronic throttle valve, comprising: a motor, a housing, and a gear transmission assembly. The motor and the gear transmission assembly are both disposed inside the housing. An external valve plate assembly module is detachably connected to the housing by bolts. The gear transmission assembly is connected to the output end of the motor. The valve plate of the valve plate assembly module is connected to the gear transmission assembly via a valve stem.

[0005] In another preferred embodiment, the housing includes a top cover and a base, both of which are detachably connected to the valve plate assembly module by bolts. A receiving cavity is formed between the top cover and the base, and the motor and the gear transmission assembly are both disposed within the receiving cavity.

[0006] In another preferred embodiment, the gear transmission assembly includes a first gear, a second gear, and a third gear that mesh sequentially, the first gear being sleeved around the output shaft of the motor, and the third gear being sleeved around the valve stem.

[0007] In another preferred embodiment, the gear transmission assembly includes a worm, a worm wheel, an intermediate tooth, and an output tooth. The output shaft of the motor is connected to the worm, the worm meshes with the worm wheel, the worm wheel meshes with the output tooth through the intermediate tooth, and the output tooth is connected to the valve stem via a spline drive.

[0008] In another preferred embodiment, it further includes: a bushing, the third gear being sleeved outside the bushing, one end of the valve stem passing through the upper cover and extending into the bushing, the valve stem being connected to the third gear through the bushing.

[0009] In another preferred embodiment, the system further includes a PCB board disposed on the side of the motor near the base and connected to the motor, and a single-channel position signal chip disposed on the PCB board and connected to the motor.

[0010] In another preferred embodiment, the motor is provided with an encoder.

[0011] In another preferred embodiment, the upper cover has a connection hole, a sealing ring is provided in the connection hole, one end of the valve stem passes through the connection hole and extends into the receiving cavity, and the outer wall of the valve stem abuts against the sealing ring.

[0012] The present invention, by adopting the above-mentioned technical solution, has the following positive effects compared with the prior art: By applying the present invention, a gear actuator for an electronic throttle valve is proposed. It eliminates the redundant bidirectional spring return mechanism and limp position structure in the traditional electronic throttle valve, and uses a low-torque, low-cost motor with a gear transmission structure with a large gear ratio to amplify the torque. Combined with a single-channel position signal chip to replace the high-cost bidirectional position sensor, it not only helps to reduce the hardware procurement, mold development and production management costs of the electronic throttle valve body, but also accurately meets the intake volume adjustment requirements of the range-extended engine under all operating conditions while simplifying the structure, thus adapting to its lightweight and high-efficiency design trend. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the gear actuator of an electronic throttle valve according to the present invention;

[0014] Figure 2 This is a schematic diagram of another embodiment of the gear actuator of an electronic throttle valve according to the present invention.

[0015] In the attached image:

[0016] 1. Motor; 2. Top cover; 3. Base; 4. First gear; 5. Second gear; 6. Third gear; 7. Worm; 8. Worm wheel; 9. Intermediate gear; 10. Output gear; 11. Bushing; 12. PCB board; 13. Sealing ring. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0020] like Figure 1-2 As shown, a gear actuator for an electronic throttle valve according to a preferred embodiment includes: a motor 1, a housing, and a gear transmission assembly. The motor 1 and the gear transmission assembly are both disposed within the housing. An external valve plate assembly module is detachably connected to the housing by bolts. The gear transmission assembly is connected to the output end of the motor 1. The valve plate of the valve plate assembly module is connected to the gear transmission assembly via a valve stem.

[0021] Furthermore, in a preferred embodiment, the housing includes: an upper cover 2 and a base 3, both of which are detachably connected to the valve plate assembly module by bolts, and a receiving cavity is formed between the upper cover 2 and the base 3, and the gear transmission assembly of the motor 1 is disposed in the receiving cavity.

[0022] Furthermore, as a preferred embodiment, the gear transmission assembly includes a first gear 4, a second gear 5, and a third gear 6 that mesh sequentially. The first gear 4 is sleeved around the output shaft of the motor 1, and the third gear 6 is sleeved around the valve stem.

[0023] In another embodiment of this utility model, the gear transmission assembly includes: a worm 7, a worm wheel 8, an intermediate tooth 9, and an output tooth 10. The output shaft of the motor 1 is connected to the worm 7, the worm 7 meshes with the worm wheel 8, the worm wheel 8 meshes with the output tooth 10 through the intermediate tooth 9, and the output tooth 10 is connected to the valve stem via a spline drive. Further, the output shaft of the motor 1 can drive the worm 7 to rotate. The worm 7 meshes with the worm wheel 8, and the large reduction ratio characteristic of the worm wheel structure can amplify the torque of the first gear. The worm wheel 8 transmits power to the output tooth 10 through the intermediate tooth 9, and the output tooth 10 is connected to the valve stem via a spline, further transmitting torque to the valve stem to drive the valve plate to rotate and adjust the opening. Because the worm wheel structure has a self-locking characteristic, it can keep the valve plate stable at any opening position, eliminating the need for an additional spring return mechanism.

[0024] Furthermore, in a preferred embodiment, it further includes: a bushing 11, with the third gear 6 sleeved outside the bushing 11, one end of the valve stem passing through the upper cover 2 and extending into the bushing 11, and the valve stem connected to the third gear 6 via the bushing 11. Furthermore, the bushing 11 serves as a connecting medium between the third gear 6 and the valve stem, preventing direct contact between the valve stem and the third gear 6 and causing wear, while also ensuring coaxiality during transmission and improving transmission accuracy.

[0025] Furthermore, in a preferred embodiment, the bushing 11 has a positioning hole, and the valve stem has a threaded hole that is directly opposite the positioning hole. Positioning screws are installed in both the positioning hole and the threaded hole, and these screws are threaded into the threaded holes. Furthermore, by providing the threaded holes and positioning screws, the valve stem can be securely fixed within the bushing 11 to prevent the third gear 6 from moving axially along the valve stem during transmission. The threaded holes and positioning screws also facilitate the adaptation of the same specification of third gear 6 to valve plate assembly modules of different diameters.

[0026] Furthermore, as a preferred embodiment, it also includes: a PCB board 12, which is disposed on the side of the motor 1 near the base 3 and connected to the motor 1. A single-channel position signal chip is disposed on the PCB board 12 and connected to the motor 1. Furthermore, the single-channel position signal chip on the PCB board 12 can detect the rotation angle of the motor 1 in real time, and after conversion, the rotation angle of the valve stem can be obtained, thereby accurately identifying the opening degree of the valve plate.

[0027] In another embodiment of this utility model, an encoder is provided inside the motor 1. Further, the encoder is used to detect the rotation angle of the motor 1, which, after conversion, yields the rotation angle of the valve stem, thereby accurately identifying the opening degree of the valve plate. The encoder can feed back relevant signals to the engine control system to complete closed-loop regulation.

[0028] Furthermore, in a preferred embodiment, the upper cover 2 has a connection hole, and a sealing ring 13 is disposed in the connection hole. One end of the valve stem passes through the connection hole and extends into the receiving cavity, with the outer wall of the valve stem abutting against the sealing ring 13. Furthermore, the sealing ring 13 is used to prevent lubricating oil leakage from the receiving cavity, while also blocking external dust and moisture from entering the receiving cavity, thereby protecting the normal operation of the gear transmission assembly and the motor 1.

[0029] The working principle of this utility model is as follows: After the motor 1 is powered on, it outputs power, and its output shaft can drive the first gear 4 to rotate. The first gear 4 meshes with the second gear 5 and transmits power to the second gear 5. The second gear 5 then meshes with the third gear 6. Through the large gear ratio of the multi-stage gears, the output torque of the motor 1 can be amplified to a target torque sufficient to drive the valve plate. The third gear 6 drives the valve stem to rotate through the bushing 11. The valve stem is connected to the valve plate. By driving the valve plate to rotate through the valve stem, the valve plate opening can be adjusted, thereby controlling the intake volume of the range extender engine.

[0030] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear actuator for an electronic throttle valve, characterized in that, include: The system includes a motor, a housing, and a gear transmission assembly. The motor and the gear transmission assembly are both housed within the housing. An external valve plate assembly module is detachably connected to the housing via bolts. The gear transmission assembly is connected to the output end of the motor. The valve plate of the valve plate assembly module is connected to the gear transmission assembly via a valve stem.

2. The gear actuator for the electronic throttle valve according to claim 1, characterized in that, The housing includes an upper cover and a base, both of which are detachably connected to the valve plate assembly module by bolts. A receiving cavity is formed between the upper cover and the base, and the motor and the gear transmission assembly are both disposed within the receiving cavity.

3. The gear actuator for the electronic throttle valve according to claim 2, characterized in that, The gear transmission assembly includes a first gear, a second gear, and a third gear that mesh in sequence. The first gear is sleeved around the output shaft of the motor, and the third gear is sleeved around the valve stem.

4. The gear actuator for an electronic throttle valve according to claim 2, characterized in that, The gear transmission assembly includes a worm, a worm wheel, an intermediate tooth, and an output tooth. The output shaft of the motor is connected to the worm, the worm meshes with the worm wheel, the worm wheel meshes with the output tooth through the intermediate tooth, and the output tooth is connected to the valve stem via a spline drive.

5. The gear actuator for an electronic throttle valve according to claim 3, characterized in that, Also includes: A bushing is provided, the third gear is sleeved on the outside of the bushing, one end of the valve stem passes through the upper cover and extends into the bushing, and the valve stem is connected to the third gear through the bushing.

6. The gear actuator for the electronic throttle valve according to claim 3, characterized in that, Also includes: A PCB board is disposed on the side of the motor near the base and connected to the motor. A single-channel position signal chip is disposed on the PCB board and connected to the motor.

7. The gear actuator for an electronic throttle valve according to claim 1, characterized in that, An encoder is installed inside the motor.

8. The gear actuator for an electronic throttle valve according to claim 2, characterized in that, The upper cover has a connection hole, and a sealing ring is provided in the connection hole. One end of the valve stem passes through the connection hole and extends into the receiving cavity, and the outer wall of the valve stem abuts against the sealing ring.

Images