Phase actuator with good reliability

Abstract

The utility model relates to a phase actuator with good reliability, which comprises a stator, a rotor rotationally arranged in the stator and a driving wheel fixedly arranged at one end of the stator and used for sealing the rotor, and a reset torsion spring used for driving the unlocked rotor to rotate towards a reset direction is arranged between the stator and the rotor. The inner end of the reset torsion spring is arranged in a first torsion spring cavity formed in the corresponding end face of the cylinder, the outer end of the reset torsion spring is arranged in a second torsion spring cavity formed in the inner cover face of the stator, the cavity bottom of the first torsion spring cavity is provided with an inner supporting face formed by three first bosses, and the cavity bottom of the second torsion spring cavity is provided with an outer supporting face formed by three second bosses. And the inner supporting surface and the outer supporting surface are matched with each other, so that the central axis of the reset torsion spring coincides with the central axis of the rotor. According to the utility model, the reliability of products is improved.

Description

Technical Field

[0001] The utility model relates to a structural improvement of a VVT phase actuator. Background Art

[0002] In the traditional VVT phase controller with a reset torsion spring, the two ends of the reset torsion spring are simply fixed on the stator and the rotor respectively, resulting in the misalignment between the central axis of the reset torsion spring and the central axis of the rotor. During operation, the reset torsion spring is prone to radial displacement, causing the rotor to also rotate and deviate, making it easy for the rotor and the stator and other adjacent components to be damaged due to severe friction, affecting the reliability of the product. Utility Model Content

[0003] The utility model aims to improve the above-mentioned defects of the existing phase actuator.

[0004] The utility model adopts the following technical solutions:

[0005] A phase actuator with good reliability comprises a stator, a rotor and a driving wheel. The stator is a circular cover body and its inner peripheral wall is provided with a plurality of compartments. The rotor comprises a cylinder and a plurality of blades provided on the outer peripheral wall of the cylinder. The cylinder is rotatably provided in the stator. The plurality of blades are rotatably provided in different compartments in a one-to-one correspondence. The driving wheel is sealed at the cover end of the stator and is fixedly connected to the stator. The plurality of blades separate a plurality of oil chambers on the outer periphery of the cylinder. Each oil chamber is connected with a line for introducing high-pressure oil into the oil chamber to drive the rotor. A power oil hole for rotating in the locking direction and a power oil groove for introducing high-pressure oil into the oil cavity to drive the rotor to rotate in the reset direction; a pin hole is axially arranged on any blade, an elastic locking pin is arranged in the pin hole, and a locking hole matching with the elastic locking pin is arranged on the inner surface of the driving wheel; a reset torsion spring for assisting in driving the unlocked rotor to rotate in the reset direction is arranged between the stator and the rotor, the reset torsion spring is arranged in the first torsion spring cavity arranged on the corresponding end surface of the cylinder and is partially exposed, and the inner end of the reset torsion spring is sleeved on the The torsion spring column is arranged at the bottom of the first torsion spring cavity, and its inner end is clamped in the first clamping groove radially arranged on the torsion spring column, and its outer end is arranged in the second torsion spring cavity arranged on the inner cover surface of the stator, and its outer end is clamped in the second clamping groove radially arranged on the side wall of the second torsion spring cavity; the outer diameter of the reset torsion spring is smaller than the inner diameter of the first torsion spring cavity, and there is a gap between its periphery and the first torsion spring cavity; the cavity bottom of the first torsion spring cavity is provided with three first bosses for supporting the inner end of the reset torsion spring, and the three first bosses are evenly arranged around the periphery of the torsion spring column and There are differences in axial height between each other, so that the surfaces of the three first bosses are all in contact with the inner end ring of the return torsion spring in the natural state; three second bosses for supporting the outer end of the return torsion spring are arranged at the bottom of the second torsion spring cavity, and the three second bosses are evenly arranged around the second center through hole and there are differences in axial height between each other, so that the surfaces of the three second bosses are all in contact with the outer end ring of the return torsion spring in the natural state, thereby making the central axis of the return torsion spring coincide with the central axis of the rotor.

[0006] As a preferred embodiment, the rotor is provided with a first central through hole, the stator is provided with a second central through hole directly connected to the first central through hole, the driving wheel is provided with a wheel center hole directly connected to the first central through hole, the apertures of the second central through hole and the wheel center hole are both larger than the aperture of the first central through hole, and the second central through hole is located at the center of the bottom of the second torsion spring cavity.

[0007] As a preferred solution, a plurality of second bosses are evenly arranged around the second central through hole.

[0008] As a preferred solution, all power oil holes are arranged inside the cylinder, the oil inlets are arranged on the end surface of the cylinder close to the driving wheel, and the oil outlets are arranged on the side walls of the cylinder and are respectively connected to their corresponding oil chambers.

[0009] As a preferred solution, the oil inlets of all the power oil holes are evenly arranged around the first central through hole and exposed in the wheel center hole.

[0010] As a preferred solution, all the power oil grooves are radially arranged on the inner surface of the driving wheel around the wheel center hole and the inner ends are connected to the wheel center hole.

[0011] As a preferred solution, the inner surface of the driving wheel is also provided with an unlocking oil groove for introducing high-pressure oil into the locking hole to drive the elastic locking pin to withdraw from the locking hole, and the unlocking oil groove is connected to a power oil groove.

[0012] The utility model has three first bosses arranged on the rotor and three second bosses arranged on the stator. The first bosses and the second bosses cooperate with each other to make the central axis of the restoring torsion spring coincide with the central axis of the rotor, thereby improving the restoring force linearity of the restoring torsion spring, reducing the radial deflection angle of the restoring torsion spring during the torsion process, and further reducing the system friction, which is beneficial to improving the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an external view of the overall structure of an embodiment of the utility model;

[0014] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the utility model;

[0015] Figure 3 This is one of the overall structural explosion diagrams of the embodiment of the utility model;

[0016] Figure 4 This is the second exploded view of the overall structure of the embodiment of the utility model;

[0017] Figure 5 This is a schematic diagram of the stator structure of an embodiment of the utility model;

[0018] Figure 6 This is a schematic diagram of the rotor structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figure 1-6 :

[0021] A phase actuator with good reliability comprises a stator 1, a rotor 2 and a driving wheel 3. The stator 1 is a circular cover body and its inner side wall is integrally formed with four partitions 1.1, and the four partitions 1.1 are divided into four compartments 1.2. The rotor 2 comprises a cylinder 2.1 with a first central through hole 2.11 and an integrally formed ring arranged on the outer peripheral wall of the cylinder 2.1 with four blades 2.2. The cylinder 2.1 is rotatably arranged at the center of the stator 1, and the four blades 2.2 are rotatably arranged in different compartments 1.2 in a one-to-one correspondence. The driving wheel 3 is arranged at the cover end of the stator 1 and is fixedly connected to the stator as a whole by four screws 4 to enclose the rotor 2 inside the stator 1. The outer peripheral wall of the driving wheel 3 is provided with gear teeth.

[0022] The stator 1 is provided with a second central through hole 1.3 which is directly connected to the first central through hole 2.11, and the driving wheel 3 is provided with a wheel center hole 3.1 which is directly connected to the first central through hole 2.11. The apertures of the second central through hole 1.3 and the wheel center hole 3.1 are both larger than the aperture of the first central through hole 2.11.

[0023] A pin hole is axially arranged on any blade 2.2, an elastic locking pin 5 is arranged in the pin hole, and a locking hole 3.2 matched with the elastic locking pin 5 is arranged on the inner surface of the driving wheel 3.

[0024] The inner surface of the driving wheel 3 is also provided with an unlocking oil groove 3.3 connecting the locking hole 3.2 and the wheel center hole 3.1. The unlocking oil groove 3.3 can introduce high-pressure oil into the locking hole 3.2 to drive the elastic locking pin 5 to exit the locking hole 3.2.

[0025] Four blades 2.2 separate four oil chambers 2.3 on the outer circumference of the cylinder 2.1. One circumferential end of each oil chamber 2.3 is connected to a power oil hole 2.4 for introducing high-pressure oil into the oil chamber 2.3 to drive the rotor 2 to rotate in the locking direction. All power oil holes 2.4 are arranged inside the cylinder 2.1 and the oil inlets are arranged on the end surface of the cylinder 2.1 at the end close to the driving wheel 3, and the oil outlets are arranged on the side walls of the cylinder 2.1 and are respectively connected to the corresponding oil chambers 2.3. The oil inlets of all power oil holes 2.4 are evenly arranged around the first central through hole 2.1 and exposed in the wheel center hole 3.1.

[0026] The inner cover surface of the driving wheel 3 is provided with four power oil grooves 3.4 which are respectively connected with the four oil chambers 2.3 and are used to introduce high-pressure oil into the four oil chambers 2.3 to drive the rotor 2 to rotate in the reset direction. The four power oil grooves 3.4 are radially arranged around the wheel center hole 3.1 and the inner ends are all connected with the wheel center hole 3.1. The unlocking oil groove 3.2 is connected with one power oil groove 3.4.

[0027] A reset torsion spring 6 for assisting in driving the unlocked rotor 2 to rotate in the reset direction is also provided between the stator 1 and the rotor 2. The reset torsion spring 6 is provided in a first torsion spring cavity 2.5 provided on the corresponding end face of the cylinder 2.1 and is partially exposed, so that its inner end supports the rotor 2 and its outer end supports the stator 1. The inner end of the reset torsion spring 6 is sleeved and fixed on the torsion spring column 2.6 provided on the bottom of the first torsion spring cavity 2.5, and its inner end is clamped and fixed in a first clamping groove 2.61 radially provided on the torsion spring column 2.6. The outer end of the reset torsion spring 6 is provided in a second torsion spring cavity 1.4 provided on the inner cover surface of the stator 1, and its outer end is clamped in a second clamping groove 1.5 radially provided on the side wall of the second torsion spring cavity 1.4. The second center through hole 1.3 is located at the center of the bottom of the second torsion spring cavity 1.4.

[0028] The outer diameter of the reset torsion spring 6 is smaller than the inner diameter of the first torsion spring cavity 2.5 and a gap is left between its periphery and the first torsion spring cavity 2.5; the bottom of the first torsion spring cavity 2.5 is provided with three first bosses 2.7 for supporting the inner end of the reset torsion spring 6, and the three first bosses 2.7 are evenly arranged around the periphery of the torsion spring column 2.6 and have a difference in axial height between each other, so that the table surfaces of the three first bosses 2.7 are all in contact with the inner end ring of the reset torsion spring 6 in the natural state; the bottom of the second torsion spring cavity 1.4 is provided with three second bosses 1.6 for supporting the outer end of the reset torsion spring 6, and the three second bosses 1.6 are evenly arranged around the second center through hole 1.4 and have a difference in axial height between each other, so that the table surfaces of the three second bosses 1.6 are all in contact with the outer end ring of the reset torsion spring 6 in the natural state, thereby making the central axis of the reset torsion spring coincide with the central axis of the rotor. The purpose of this design is to improve the linearity of the restoring force (force-torsion angle) of the reset torsion spring 6, reduce the radial deflection angle of the reset torsion spring 6 during torsion, and further reduce the friction between the reset torsion spring 6 and the stator 1 and the rotor 2, and the friction between the rotor 2 and the stator 1 and the drive wheel 3, so as to improve the reliability of the product. It should be pointed out that the number of the first boss 2.7 and the second boss 1.6 is not limited to three, and the first boss 2.7 can even be designed as a continuous and inclined inner support surface, and the second boss 1.6 can be designed as a continuous and inclined outer support surface. As long as two support surfaces are respectively provided on the stator 1 and the rotor 2 to fit the inner and outer end rings of the reset torsion spring 6 in a natural state, similar designs to reduce the friction of the system fall within the protection scope of the present utility model.

[0029] It should also be pointed out that the number of blades 2.2 on the rotor 2 is not limited to four, and is generally set to three to five blades 2.2 according to the diameter of the cylinder 2.1. Accordingly, the number of supporting structures such as the compartment 1.2 on the stator 1, the oil chamber 2.3 and the power oil hole 2.4 on the rotor 2 must be consistent with the number of blades 2.2.

Claims

1. A phase actuator with good reliability, comprising a stator, a rotor and a driving wheel, wherein the stator is a circular cover body and a plurality of compartments are arranged around the inner circumference of the stator, the rotor comprises a cylinder and a plurality of blades arranged around the outer circumference of the cylinder, the cylinder is rotatably arranged in the stator, the plurality of blades are rotatably arranged in different compartments in a one-to-one correspondence, the driving wheel is sealed at the cover end of the stator and is fixedly connected to the stator; the plurality of blades separate a plurality of oil chambers on the outer circumference of the cylinder, each of the oil chambers is connected to a power oil hole for introducing high-pressure oil into the oil chamber to drive the rotor to rotate in a locking direction and a power oil hole for introducing high-pressure oil into the oil chamber to drive the rotor to rotate in a reset direction A pin hole is axially arranged on any blade, an elastic locking pin is arranged in the pin hole, and a locking hole matching with the elastic locking pin is arranged on the inner surface of the driving wheel; a reset torsion spring for assisting in driving the unlocked rotor to rotate in the reset direction is arranged between the stator and the rotor, the reset torsion spring is arranged in the first torsion spring cavity arranged on the corresponding end surface of the cylinder and is partially exposed, the inner end of the reset torsion spring is sleeved on the torsion spring column arranged on the bottom of the first torsion spring cavity, and the inner end head thereof is clamped in the first clamping groove radially arranged on the torsion spring column, the outer end is arranged in the second torsion spring cavity arranged on the inner cover surface of the stator, and the outer end head thereof is clamped in the second clamping groove radially arranged on the side wall of the second torsion spring cavity; characterized in that: The outer diameter of the reset torsion spring is smaller than the inner diameter of the first torsion spring cavity and there is a gap between its periphery and the first torsion spring cavity; the bottom of the first torsion spring cavity is provided with three first bosses for supporting the inner end of the reset torsion spring, and the three first bosses are evenly arranged around the periphery of the torsion spring column and there is a difference in axial height between each other, so that the table surfaces of the three first bosses are all in contact with the inner end circle of the reset torsion spring in a natural state; the bottom of the second torsion spring cavity is provided with three second bosses for supporting the outer end of the reset torsion spring, and the three second bosses are evenly arranged around the second center through hole and there is a difference in axial height between each other, so that the table surfaces of the three second bosses are all in contact with the outer end circle of the reset torsion spring in a natural state, thereby making the central axis of the reset torsion spring coincide with the central axis of the rotor.

2. The phase actuator with good reliability according to claim 1, characterized in that: The rotor is provided with a first central through hole, the stator is provided with a second central through hole directly connected to the first central through hole, the driving wheel is provided with a wheel center hole directly connected to the first central through hole, the apertures of the second central through hole and the wheel center hole are both larger than the aperture of the first central through hole, and the second central through hole is located at the center of the bottom of the second torsion spring cavity.

3. The phase actuator with good reliability according to claim 2, characterized in that: A plurality of second bosses are evenly arranged around the second central through hole.

4. The phase actuator with good reliability according to claim 1, characterized in that: All the power oil holes are arranged inside the cylinder, and the oil inlets are arranged on the end surface of the cylinder close to the driving wheel, and the oil outlets are arranged on the side wall of the cylinder and are connected to their corresponding oil chambers.

5. The phase actuator with good reliability according to claim 4, characterized in that: The oil inlets of all the power oil holes are evenly arranged around the first central through hole and exposed in the wheel center hole.

6. The phase actuator with good reliability according to claim 4, characterized in that: All the power oil grooves are radially arranged on the inner surface of the driving wheel around the wheel center hole, and the inner ends are connected to the wheel center hole.

7. The phase actuator with good reliability according to claim 1, characterized in that: The inner surface of the driving wheel is also provided with an unlocking oil groove for introducing high-pressure oil into the locking hole to drive the elastic locking pin to withdraw from the locking hole, and the unlocking oil groove is connected to a power oil groove.

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