Camshaft phase actuator with good sealing performance

Abstract

The actuator comprises a driving wheel, a stator, a rotor and a rear cover, the driving wheel comprises a rim and a spoke disc arranged in the rim, a wheel cavity is formed between the rear disc face of the spoke disc and the rim, the stator is arranged in the wheel cavity, the stator comprises a circular ring body and a plurality of bosses arranged on the inner circumferential wall of the circular ring body, and the rotor is arranged in the circular ring body. The plurality of bosses are divided into a plurality of oil cavities, the rotor comprises a cylinder and a plurality of blades arranged on the peripheral wall of the cylinder, the cylinder is rotationally arranged in the circular cavity, and the plurality of blades are rotationally arranged in the plurality of oil cavities respectively; the rear cover covers the rear end of the circular ring body, and the rear cover and the stator are locked and fixed on the spoke disc through screws, so that the spoke disc and the rear cover respectively seal the front and rear openings of all the oil cavities; the front end face of the circular ring body is provided with a first sealing ring used for bridging a connecting gap between the circular ring body and the spoke disc, and the rear end face of the circular ring body is provided with a second sealing ring used for bridging a connecting gap between the circular ring body and the rear cover. The sealing structure is good in sealing performance.

Description

Technical Field

[0001] The utility model relates to a camshaft phase controller, in particular to a sealing structure of a camshaft phase controller. Background Art

[0002] The camshaft phase controller is an important component in the variable valve timing device. Common camshaft phase controllers rely on the tightness of the connections of related components to prevent high-pressure oil leakage, and the sealing is difficult to guarantee. Utility Model Content

[0003] The utility model aims to provide a camshaft phase controller with better sealing performance.

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

[0005] A camshaft phase actuator with good sealing performance comprises a driving wheel, a stator, a rotor and a rear cover, wherein the driving wheel comprises a wheel rim and a spoke disc arranged inside the wheel rim, a wheel cavity is formed between the rear disc surface of the spoke disc and the wheel rim, the stator is arranged in the wheel cavity, the stator comprises a circular ring body and a plurality of bosses integrally formed and arranged on the inner peripheral wall of the circular ring body, the plurality of bosses are surrounded by a circular cavity at the center of the circular ring body and the inner peripheral wall of the circular ring body is divided into a plurality of oil cavities, the rotor comprises a cylindrical body and a plurality of blades integrally formed and arranged on the outer peripheral wall of the cylindrical body, the cylindrical body is rotatably arranged in the circular cavity, and the plurality of blades are arranged on the inner peripheral wall of the cylindrical body. The ring body is rotatably arranged in a plurality of oil chambers respectively; the rear cover is covered on the rear end of the ring body and is fixed to the spoke disk together with the stator by screws, so that the spoke disk and the rear cover respectively close the front and rear openings of all the oil chambers; the front end surface of the ring body is provided with a first sealing ring for bridging the connection gap between it and the spoke disk, and the rear end surface of the ring body is provided with a second sealing ring for bridging the connection gap between it and the rear cover, and the first sealing ring and the second sealing ring are partially exposed and respectively pre-embedded and fixed in corresponding embedding grooves on the ring body, so as to be installed in the driving wheel together with the stator.

[0006] As a preferred solution, the camshaft phase actuator further comprises a cover for enclosing the stator and the cover plate, and a front opening of the cover is inserted into the wheel cavity.

[0007] As a preferred solution, an outer folding ring is provided on the outer periphery of the front opening of the cover, and an open retaining spring is sleeved on the cover behind the outer folding ring. The open retaining spring is clamped and fixed in a groove provided on the peripheral wall of the wheel cavity to press the outer folding ring tightly and fix it to the rear disk surface of the spoke disk, thereby fixing the cover in the drive wheel.

[0008] As a preferred solution, the inner rear portion of the cover is tightly fitted with the rear cover in the circumferential direction, and the front end of the cover is provided with a third sealing ring for bridging the connection gap between the cover and the spoke disk.

[0009] As a preferred solution, the third sealing ring is partially exposed forward and pre-sleeved and fixed on the front side of the outer folding ring so as to be installed into the driving wheel together with the cover.

[0010] The utility model provides sealing rings between the stator and the driving wheel, between the stator and the rear cover, and provides a cover that fits tightly with the rear cover on the periphery of the stator and the rear cover, and also provides a sealing ring between the cover and the driving wheel, so that a double-layer sealing structure is provided for each oil cavity provided in the stator, thereby improving the sealing performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an external view of the overall structure of an embodiment of the utility model at a certain angle;

[0012] Figure 2 Another external view of the overall structure of the embodiment of the utility model;

[0013] Figure 3 A radial cross-sectional view of the overall structure of an embodiment of the utility model;

[0014] Figure 4 This is an axial cross-sectional view of the overall structure of an embodiment of the utility model;

[0015] Figure 5 An exploded view of the overall structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The present invention is described below in conjunction with the accompanying drawings and specific embodiments.

[0017] like Figure 1-5 As shown, a camshaft phase actuator with good sealing performance includes a driving wheel 1, a stator 2, a rotor 3, a rear cover 4, a cover 5 and an open retaining spring 6.

[0018] The driving wheel 1 comprises a rim 1.1 with external teeth and a spoke 1.2 which is integrally formed and sealed inside the rim 1.1, and a wheel cavity 1.3 is formed between the rear disc surface of the spoke 1.2 and the rim 1.1.

[0019] The stator 2 is centrally arranged in the wheel cavity 1.3. The stator 2 includes a circular ring body 2.1 and five bosses 2.2 integrally formed and arranged on the inner wall of the circular ring body 2.1. The five bosses 2.2 enclose a circular cavity 2.3 in the center of the circular ring body 2.1 and separate the inner wall of the circular ring body 2.1 into five oil cavities 2.4.

[0020] The rotor 3 is arranged in the stator 2, and the rotor 3 includes a cylinder 3.1 with a central axis hole and five blades 3.2 integrally formed and annularly arranged on the outer peripheral wall of the cylinder 3.1. The cylinder 3.1 is rotatably arranged in the circular cavity 2.3, and the five blades 3.2 are rotatably arranged in five oil chambers 2.4 respectively. The cylinder 3.1 on both sides of each blade 3.2 is provided with a first oil hole and a second oil hole for introducing high-pressure oil into the oil chamber 2.4 where the blade 3.2 is located, so as to drive the blade 3.2 to rotate to the circumferential ends of the oil chamber 2.4 where the blade 3.2 is located, so that the blade 3.2 is in the locked position and the unlocked position.

[0021] The rear cover 4 covers the rear end of the annular body 2.1 and is fixed to the spoke 1.2 together with the stator 2 by a plurality of screws 7, so that the spoke 1.2 and the rear cover 4 respectively close the front and rear openings of the five oil chambers 1.3.

[0022] The front plate surface of the rear cover 4 is provided with a locking hole, and correspondingly, a pin hole is radially provided on a blade 3.2, and a locking pin 8 is elastically provided in the pin hole, which can be partially pushed into the locking hole when the blade 3.2 rotates to the locking position. The locking hole is connected to a third oil hole for introducing high-pressure oil into the hole to drive the locking pin 8 to unlock. The third oil hole is provided on the cylinder 3.1 and is connected to the locking hole 1 through the oil guide groove provided on the front plate surface of the rear cover 4.

[0023] The cover 5 surrounds the stator 2 and the cover plate 4 and its front opening is inserted into the wheel cavity 1.3. An outer folding ring 5.1 is provided on the periphery of the front opening of the cover 5. An open retaining spring 6 is sleeved on the periphery of the cover 5 from the rear of the outer folding ring 5.1 and is fixed in the retaining groove 1.4 provided on the peripheral wall of the wheel cavity 1.3, so as to press and fix the outer folding ring 5.1 to the rear disk surface of the spoke disk 1.2, thereby fixing the cover 5 in the driving wheel 1.

[0024] In order to prevent the high-pressure oil in the five oil chambers 1.3 from leaking along the connection gaps between the annular body 2.1 and the spoke 1.2 and between the annular body 2.1 and the rear cover 4, the present embodiment provides a two-layer sealing structure for the five oil chambers 1.3. The first layer of the sealing structure is as follows: the front end surface of the annular body 2.1 is provided with a first sealing ring 9 for bridging the connection gap between it and the spoke 1.2, and the rear end surface of the annular body 2.1 is provided with a second sealing ring 10 for bridging the connection gap between it and the rear cover 4. The first sealing ring 9 and the second sealing ring 10 are provided. The sealing rings 10 are partially exposed and pre-embedded and fixed in the corresponding embedding grooves 2.11 on the annular body 2.1, so that they can be installed into the driving wheel 1 together with the stator 2; the second layer of sealing structure is: the inner rear part of the cover 5 and the rear cover 4 are tightly fitted circumferentially, and the front end of the cover 5 is provided with a third sealing ring 11 for bridging the connection gap between it and the spoke 1.2. The third sealing ring 11 is partially exposed and pre-sleeved and fixed on the front side of the outer folding ring 5.1, so that it can be installed into the driving wheel 1 together with the cover 5.

Claims

1. A camshaft phase actuator with good sealing performance, comprising a driving wheel, a stator, a rotor and a rear cover, the driving wheel comprising a wheel rim and a spoke disc arranged inside the wheel rim, a wheel cavity is formed between the rear disc surface of the spoke disc and the wheel rim, the stator is arranged in the wheel cavity, the stator comprises a ring body and a plurality of bosses integrally formed and arranged on the inner peripheral wall of the ring body, the plurality of bosses enclose a circular cavity in the center of the ring body and separate into a plurality of oil cavities on the inner peripheral wall of the ring body, the rotor comprises a cylinder and a plurality of blades integrally formed and arranged on the outer peripheral wall of the cylinder, the cylinder is rotatably arranged in the circular cavity, and the plurality of blades are rotatably arranged in the plurality of oil cavities respectively; the rear cover is covered on the rear end of the ring body, and is fixed to the spoke disc by screws together with the stator, so that the front and rear openings of all the oil cavities are respectively closed by the spoke disc and the rear cover; it is characterized in that: The front end face of the annular body is provided with a first sealing ring for bridging the connection gap between it and the spoke disk, and the rear end face of the annular body is provided with a second sealing ring for bridging the connection gap between it and the rear cover. The first sealing ring and the second sealing ring are partially exposed and pre-embedded and fixed in corresponding grooves on the annular body, so as to be installed in the drive wheel together with the stator.

2. A camshaft phase actuator with good sealing performance according to claim 1, characterized in that: The utility model also comprises a cover for enclosing the stator and the cover plate, and the front opening of the cover is inserted into the wheel cavity.

3. A camshaft phase actuator with good sealing performance according to claim 2, characterized in that: An outer folding ring is provided on the periphery of the front opening of the cover, and an open retaining spring is sleeved on the cover behind the outer folding ring. The open retaining spring is clamped and fixed in a groove provided on the peripheral wall of the wheel cavity to press the outer folding ring tightly and fix it to the rear disk surface of the spoke disk, thereby fixing the cover in the driving wheel.

4. A camshaft phase actuator with good sealing performance according to claim 3, characterized in that: The inner rear part of the cover is tightly fitted with the rear cover in the circumferential direction, and the front end of the cover is provided with a third sealing ring for bridging the connection gap between the cover and the spoke disk.

5. A camshaft phase actuator with good sealing performance according to claim 4, characterized in that: The third sealing ring is partially exposed forward and pre-sleeved and fixed on the front side of the outer folding ring so as to be installed into the driving wheel together with the cover.

Images