Electronic vvt phase actuator

Abstract

The utility model discloses an electronic VVT phase executor. The utility model relates to the related product field of engine electromagnetic valve, the electronic VVT phase executor integrates four big function modules of drive, execution, sensing and limit, adopts direct current motor cooperation gear transmission system drive rotating arm axle rotation, and the assembly connection strength and assembly accuracy are ensured through laser welding technology. The shell design sensor installation positioning groove promotes position detection accuracy, and sets up stay wire fixed structure and realizes external linkage control. Innovatively adopt differentiation bearing layout, and the sliding bearing is close to the sector gear side, and the needle bearing is placed in the far end, and the stress distribution is optimized. Set up maximum and minimum limit support, and the rotating arm angular displacement range is accurately controlled. Experiments show that, the structure is stable in operation, and the response is sensitive, is applicable to the working condition that needs accurate flow regulation, and has good engineering application prospect.

Description

Technical Field

[0001] This utility model relates to the field of engine solenoid valve related products, and more specifically to an electronic VVT phase actuator. Background Technology

[0002] Automotive VVT ​​(Variable Valve Timing) technology, under specific engine operating conditions, adjusts the intake and exhaust volume and changes the valve overlap angle by controlling the advance and retardation of the intake valve opening angle. This, combined with the opening and closing of solenoid valves connected to different intake and exhaust ports, increases intake volume and efficiency, better organizes intake swirl, and regulates cylinder combustion pressure and residual exhaust gas volume to achieve optimal engine power, torque, emissions, and fuel economy. The exhaust VVT control solenoid valve is responsible for distributing engine oil according to engine operating conditions.

[0003] Electronic positioner valve actuators are used to change the exhaust phase of an engine. Traditional engines, with their fixed camshaft design adapted to common operating conditions, cannot meet the demands of full-speed operation and ensure efficient exhaust gas discharge.

[0004] Current engines use electronic positioner actuators to dynamically adjust the valve timing, achieving exhaust optimization across the entire speed range, which is one of the core technologies for improving overall engine performance. Utility Model Content

[0005] The purpose of this utility model is to provide an electronic VVT phase actuator in order to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: This invention provides an electronic VVT phase actuator.

[0007] Includes: a drive assembly comprising a DC motor, a motor gear fixedly connected to the motor output shaft, and an intermediate gear and a sector gear rotatably mounted on the housing.

[0008] Furthermore, the intermediate gear simultaneously meshes with the motor gear and the sector gear.

[0009] Specifically, the execution components include the swing arm shaft, the swing arm, and the pin.

[0010] Furthermore, the swing arm shaft is supported on the housing by needle roller bearings and sliding bearings, and the sector gear is fixed to the end of the swing arm shaft by laser welding.

[0011] Specifically, the position feedback component includes a position sensor that is fixed to the housing by a clamp.

[0012] Furthermore, the housing is provided with a sensor mounting and positioning groove that mates with the sensor positioning post.

[0013] Specifically, the torque compensation component includes a torsion spring fitted onto the sector gear, with its legs respectively abutting the sector gear and the limiting legs of the housing.

[0014] Specifically, the sliding bearing is arranged on the side of the swing arm shaft closer to the sector gear, and the needle roller bearing is arranged on the side away from the sector gear, forming a differentiated support layout.

[0015] Specifically, the DC motor of the drive assembly is directly fixed to the side wall of the housing with two self-tapping screws, without the need for additional threaded inserts.

[0016] Specifically, the pin of the actuator component and the rotating arm are laser welded to form an integrated rotating arm pin assembly, which is then fixed to the rotating arm shaft by laser welding.

[0017] Specifically, the housing integrates a pull cord fixing structure, which includes a pull pin hole and a pin groove, and transmits the displacement of the pull cord through the rigid connection of the pin.

[0018] Specifically, the housing is provided with a maximum limit support and a minimum limit support on the rotation path of the swing arm shaft to limit the angular displacement range of the swing arm.

[0019] The beneficial effects of this utility model are as follows: (1) The housing of this utility model is provided with a positioning groove for installing the sensor, which cooperates with the sensor positioning post to facilitate the installation of the sensor; the housing is provided with a structure for installing and fixing the pull rope for fixing the pull rope, and the design structure is compact.

[0020] (2) The screws for fixing the motor on the housing of this utility model are two self-tapping screws. The screw mounting holes in the housing reduce the thread tapping process, improve the housing processing efficiency, and facilitate installation.

[0021] (3) This utility model is equipped with a maximum rotation limit support and a minimum rotation limit support. It can accurately provide the rotation limit required by the electronic positioner valve actuator.

[0022] (4) The sector gear and the shaft of this utility model are connected by laser welding, the rotating arm and the shaft are connected by laser welding, and the pin and the rotating arm are connected by laser welding, which solves the problem of consistent installation and positioning. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the gear transmission system of this utility model; Figure 5 This is a schematic diagram of the swing arm pin assembly.

[0025] Reference numerals: 1-Housing, 2-Swing arm shaft, 3-Swing arm, 4-Pin, 5-Position sensor, 6-DC motor, 7-Magnetic core assembly, 8-Sector gear assembly, 9-Torsion spring, 10-Intermediate shaft, 11-Intermediate gear, 12-Elastic washer, 13-Bushing, 14-Clamp, 15-Self-tapping screw, 16-Clip ring, 17-Needle roller bearing, 18-Sliding bearing, 19-Motor gear, 20-Position sensor mounting slot, 21-Pull wire fixing structure, 22-Swing arm pin assembly, 23-Pull pin hole, 24-Pin slot, 25-Maximum limit support structure, 26-Minimum limit support structure. Detailed Implementation

[0026] To make the technical problems, technical solutions, and technical effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Example 1 like Figure 1-5 As shown, an electronic VVT phase actuator includes a housing 1, a rotating arm shaft 2 for driving the rotating arm 3 to rotate, and a pin 4 mounted on the rotating arm. The rotating arm shaft 2 is fixed inside the housing 1 by a needle roller bearing 17 and a sliding bearing 18. The needle roller bearing 17 is located on the side of the rotating arm shaft 2 away from the sector gear 8, and the sliding bearing 18 is located on the side of the rotating arm shaft 2 closer to the sector gear 8. The position sensor 5 is fixed to the housing 1 by a clamp 14. The housing 1 also includes a DC motor 6, a motor gear 19, an intermediate gear 11, a sector gear 8, and a torsion spring 9. The DC motor 6 is installed on one side of the housing 1, the motor gear 19 is installed on the output shaft of the DC motor 6, the intermediate gear 11 is rotatably installed on the housing 1, and the intermediate gear 11 meshes with the motor gear 19. The sector gear 8 is fixed to the end of the rotating arm shaft 2 by laser welding and meshes with the intermediate gear 11. The torsion spring 9 is fitted on the sector gear 8, and the two legs of the torsion spring 9 are fixed on the limiting legs of the sector gear 8. At the same time, the two legs of the torsion spring 9 are stuck on both sides of the limiting legs of the housing 1.

[0030] The motor 6 is mounted on the housing 1 using two self-tapping screws 15.

[0031] The housing 1 is designed with a mounting and positioning groove 20 for mounting and fixing sensors; the housing 1 is provided with a structure 21 for mounting and fixing pull ropes, and this structure is designed with a pull pin hole 23 and a pin groove 24 for the pin to be rigidly connected to realize the operation of the position valve actuator.

[0032] The housing 1 is designed with a maximum limit support structure 25 and a minimum limit support structure 26.

[0033] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An electronic VVT phase actuator, characterized in that, include: The drive assembly includes a DC motor (6), a motor gear (19) fixedly connected to the motor output shaft, an intermediate gear (11) rotatably mounted on the housing (1), and a sector gear (8), wherein the intermediate gear (11) simultaneously meshes with the motor gear (19) and the sector gear (8); the actuation assembly includes a rotating arm shaft (2), a rotating arm (3), and a pin (4), wherein the rotating arm shaft (2) is supported on the housing (1) by a needle roller bearing (17) and a sliding bearing (18), and the sector gear (8) is fixed to the end of the rotating arm shaft (2) by laser welding; the position feedback assembly includes a position sensor (5) fixed to the housing (1) by a clamp (14), wherein the housing (1) is provided with a sensor mounting positioning groove (20) that cooperates with the sensor positioning post; the torque compensation assembly includes a torsion spring (9) fitted on the sector gear (8), wherein its support feet are respectively attached to the sector gear (8) and the limiting support feet of the housing (1).

2. The electronic VVT phase actuator according to claim 1, characterized in that, The sliding bearing (18) is arranged on the side of the swivel shaft (2) close to the sector gear (8), and the needle roller bearing (17) is arranged on the side away from the sector gear (8), forming a differentiated support layout.

3. An electronic VVT phase actuator according to claim 1, characterized in that, The DC motor (6) of the drive assembly is directly fixed to the side wall of the housing (1) by two self-tapping screws (15), without the need for additional threaded inserts.

4. An electronic VVT phase actuator according to claim 1, characterized in that, The pin (4) of the actuator and the rotating arm (3) are laser welded to form an integrated rotating arm pin assembly (22), which is then fixed to the rotating arm shaft (2) by laser welding.

5. An electronic VVT phase actuator according to claim 1, characterized in that, The housing (1) integrates a pull wire fixing structure (21), which includes a pull pin hole (23) and a pin groove (24), and transmits the displacement of the pull wire rope through the rigid connection of the pin (4).

6. An electronic VVT phase actuator according to claim 1, characterized in that, The housing (1) is provided with a maximum limit support (25) and a minimum limit support (26) on the rotation path of the rotating arm shaft (2) to limit the angular displacement range of the rotating arm (3).

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