Turbocharger executing mechanism and turbocharger

Abstract

The utility model relates to a turbocharger actuating mechanism and a turbocharger. The turbocharger actuating mechanism comprises a pull rod and a plum blossom gasket. Gear-tooth-shaped through holes are formed in the two ends of the pull rod, and the pull rod is rotationally connected to the two pin shafts through the two through holes correspondingly; the two plum blossom gaskets are arranged on the two pin shafts respectively in a sleeving mode, annular grooves are formed in the side faces of the pin shafts, the small-diameter ends of the plum blossom gaskets are clamped in the annular grooves, and the large-diameter ends of the plum blossom gaskets tightly press the pull rod. According to the actuating mechanism of the turbocharger, the circular through hole in the pull rod is improved to be in the shape similar to gear teeth, the contact face of the inner wall of the through hole and the pin shaft is changed into discontinuous linear contact or surface contact from continuous linear contact or surface contact, friction force is reduced by reducing the contact area, and therefore the problem of friction noise is solved; meanwhile, the snap ring is replaced by the plum blossom gasket, the pull rod can be prevented from being disengaged, the position of the pull rod can be limited, axial movement of the pull rod is avoided, and noise is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, in particular to a turbocharger actuator and a turbocharger. Background Art

[0002] A turbocharger is a device that uses the inertial momentum of engine exhaust to propel a turbine, which in turn drives a coaxial impeller to compress air. It boosts engine power by increasing the amount of air intake. As engine speed increases, the exhaust gas velocity increases in tandem with the turbine speed, causing the impeller to compress more air into the cylinders, thereby burning more fuel and increasing engine power.

[0003] The actuator of a turbocharger usually includes an actuator rocker arm, a bypass valve rocker arm and a pull rod. The two ends of the pull rod are respectively connected to the pins on the actuator rocker arm and the bypass valve rocker arm to achieve transmission; however, the actuator of the existing turbocharger is prone to generate loud noise during operation, mainly including the noise generated by the rotational friction between the pin and the two rocker arms, and the noise generated by the axial movement of the pull rod on the pin, which affects the user experience of the engine and the car. Utility Model Content

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem that the actuator of the turbocharger in the prior art is prone to generate large noise during operation, mainly including the noise generated by the rotational friction between the pin shaft and the two rocker arms, and the noise generated by the axial movement of the pull rod on the pin shaft, which affects the user experience of the engine and the car.

[0005] In order to solve the above technical problems, the utility model provides a turbocharger actuator, including an actuator rocker arm and a bypass valve rocker arm, and both rocker arms are provided with a pin shaft, including:

[0006] A pull rod, wherein both ends of the pull rod are provided with a through hole, and the inner wall of the through hole is provided with a plurality of grooves evenly spaced around the circumference thereof, and adjacent grooves form protrusions in the shape of gear teeth, and the two ends of the pull rod are rotatably connected to the two pin shafts through the through holes;

[0007] There are two plum blossom gaskets, and the two plum blossom gaskets are respectively sleeved on the two pin shafts. The sides of the pin shafts are coaxially provided with annular grooves. The small diameter end of the plum blossom gasket is clamped in the annular groove, and the large diameter end of the plum blossom gasket is tightly pressed against the pull rod.

[0008] In one embodiment of the present invention, the top of the protrusion is a plane or an arc surface that matches the outer circumferential surface of the pin shaft.

[0009] In one embodiment of the present invention, the diameter of the circle where the top of the protrusion is located matches the diameter of the pin shaft.

[0010] In one embodiment of the present invention, the tops of the pins are all provided with chamfers.

[0011] In one embodiment of the present invention, the pull rod includes a rod body and connecting parts integrally formed at both ends of the rod body. The connecting parts are circular, and the through hole is coaxially opened on the connecting parts.

[0012] In one embodiment of the present invention, the maximum diameter of the plum blossom gasket is not greater than the diameter of the connecting portion.

[0013] In an embodiment of the present invention, the pull rod and the pin are both made of stainless steel.

[0014] In one embodiment of the present invention, the surface of the pin is covered with a nickel-phosphorus coating or a nitriding coating.

[0015] In an embodiment of the present invention, the plum blossom gasket is made of stainless steel or manganese steel.

[0016] A turbocharger comprises the turbocharger actuator as described in any one of the above.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] The utility model describes a turbocharger actuator and a turbocharger, comprising a pull rod and a plum blossom gasket; through holes are provided at both ends of the pull rod, and a plurality of grooves evenly spaced around the circumference are provided on the inner wall of the through hole, with gear tooth-like protrusions formed between adjacent grooves, and the two ends of the pull rod are rotatably connected to the two pin shafts through the through holes; two plum blossom gaskets are provided, and the two plum blossom gaskets are respectively sleeved on the two pin shafts, and the side surfaces of the pin shafts are coaxially provided with annular grooves, the small-diameter end of the plum blossom gasket is clamped in the annular groove, and the large-diameter end of the plum blossom gasket presses the pull rod tightly. This turbocharger actuator improves the original circular through hole on the pull rod into a shape similar to gear teeth, so that the contact surface between the inner wall of the through hole and the pin shaft is changed from continuous line contact or surface contact to discontinuous line contact or surface contact, thereby reducing friction by reducing the contact area, thereby optimizing the problem of friction noise; at the same time, the retaining ring is replaced with a plum blossom gasket, which can not only prevent the pull rod from falling out, but also limit the position of the pull rod, avoid axial movement of the pull rod, and further reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further explained in detail, wherein

[0020] Figure 1 It is the perspective view of turbocharger actuator of the preferred embodiment of the utility model;

[0021] Figure 2 It is the structure schematic diagram of pull rod and pin shaft assembly together of turbocharger actuator of the preferred embodiment of the utility model;

[0022] Figure 3 It is the structure schematic diagram of plum blossom washer and pin shaft assembly together of turbocharger actuator of the preferred embodiment of the utility model;

[0023] Figure 4 It is the structure schematic diagram of pull rod of turbocharger actuator of the preferred embodiment of the utility model;

[0024] Figure 5 It is the structure schematic diagram of plum blossom washer of turbocharger actuator of the preferred embodiment of the utility model;

[0025] Figure 6 It is the section view of plum blossom washer installation on pin shaft of turbocharger actuator of the preferred embodiment of the utility model.

[0026] Description of the drawings reference sign: 1, pull rod;11, through hole;12, protrusion;13, rod body;14, connecting portion;2, plum blossom washer;3, pin shaft;31, annular groove;32, chamfer;4, actuator rocker arm;5, bypass valve rocker arm. DETAILED DESCRIPTION

[0027] The utility model is further explained in combination with the drawings and specific embodiment, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model. Example one

[0028] Referring to Figures 1-6 The utility model discloses a turbocharger actuator, including actuator rocker arm and bypass valve rocker arm, and the two rocker arms are all provided with pin shaft, including,

[0029] Pull rod 1, both ends of pull rod 1 are all provided with through hole 11, the inner wall of through hole 11 is all provided with a plurality of recesses that are arranged uniformly around its circumference, the recesses between adjacent recesses form the protrusion 12 of gear tooth shape, and both ends of pull rod 1 are rotatably connected to two pin shafts 3 through through hole 11;

[0030] The two star washers 2 are respectively sleeved on the two pin shafts 3, the side surface of the pin shaft 3 is coaxially provided with an annular groove 31, one end of the star washer 2 with a small diameter is clamped in the annular groove 31, and one end of the star washer 2 with a large diameter is tightly pressed against the pull rod 1.

[0031] Specifically, the two ends of the original pull rod 1 are respectively connected with the pin shaft 3 on the actuator rocker arm 4 and the bypass valve rocker arm 5 through the circular through hole, the inner wall of the through hole 11 is in close contact with the side surface of the pin shaft 3, when the pull rod 1 and the pin shaft 3 rotate relatively and the rotating speed is relatively high or the torque is relatively large, the sharp metal friction sound is easily generated between the pin shaft 3 and the inner wall of the through hole 11. The existing method for improving the noise is to smear grease between the pin shaft 3 and the inner wall of the through hole 11 to reduce the friction, but the grease will affect the appearance of the product and needs to be supplemented regularly. The turbocharger actuator of the utility model changes the contact surface between the inner wall of the through hole 11 and the pin shaft 3 from continuous linear contact or surface contact into discontinuous linear contact or surface contact by setting the inner wall of the through hole 11 into the shape of gear teeth, thereby reducing the friction in the way of reducing the contact area, and the problem of friction noise is optimized.

[0032] Specifically, the original turbocharger actuator avoids the pull rod 1 from being loosened from the pin shaft 3 by clamping an E-shaped snap ring on the pin shaft 3, but there is an axial gap between the pull rod 1 and the snap ring, so that the pull rod 1 will axially move and collide during the operation of the actuator, thereby generating noise. The turbocharger actuator of the utility model replaces the E-shaped snap ring with the star washer 2, the star washer 2 not only can prevent the pull rod 1 from being loosened from the pin shaft 3, but also can limit the position of the pull rod 1, so that the pull rod 1 is tightly pressed and the axial movement of the pull rod 1 is limited, thereby reducing the noise.

[0033] The turbocharger actuator of the utility model changes the original circular through hole on the pull rod 1 into the shape of gear teeth, changes the contact surface between the inner wall of the through hole 11 and the pin shaft 3 from continuous linear contact or surface contact into discontinuous linear contact or surface contact, reduces the friction in the way of reducing the contact area, and optimizes the problem of friction noise; meanwhile, the E-shaped snap ring is replaced with the star washer 2, which not only can prevent the pull rod 1 from being loosened, but also can limit the position of the pull rod 1, avoid the axial movement of the pull rod 1, and further reduce the noise.

[0034] Referring to Figs. 1 to 3, Figure 2 and Figure 4 Further, the top of the protrusion 12 is a flat surface or a circular arc surface matched with the outer circular surface of the pin shaft 3.

[0035] Further, the diameter of the circle where the top of the protrusion 12 is located is matched with the diameter of the pin shaft 3.

[0036] Referring to Figure 6 Further, the top of the pin shaft 3 is provided with a large chamfer 32, which facilitates the installation of the star washer 2.

[0037] Further, the pull rod 1 comprises a rod body 13 and a connecting portion 14 integrally formed at both ends of the rod body 13, the connecting portion 14 is circular, and the through hole 11 is coaxially arranged on the connecting portion 14.

[0038] Further, the maximum diameter of the star washer 2 is not greater than the diameter of the connecting portion 14. Specifically, the diameter of the star washer 2 should be slightly smaller than the diameter of the connecting portion 14, so that the star washer 2 and the connecting portion 14 have a large enough contact area, which can better limit the axial direction of the pull rod 1.

[0039] Further, the pull rod 1 and the pin shaft 3 are made of stainless steel, but are not limited to stainless steel.

[0040] Further, the surface of the pin shaft 3 is covered with a nickel-phosphorus coating or a nitriding coating, which can improve the wear resistance and corrosion resistance of the pin shaft 3, and also has a lubricating effect, which can reduce the friction between the pull rod 1 and the pin shaft 3, and further reduce the noise caused by friction.

[0041] Further, the star washer 2 is made of stainless steel or manganese steel. Embodiment two

[0042] The utility model discloses still a kind of turbocharger, including the turbocharger actuating mechanism as embodiment one.

[0043] Apparently, the above embodiment is only for clearly illustrating the example, and is not limited to the implementation mode. For ordinary skilled person in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, it is not necessary and cannot be exhausted to all implementation modes. The obvious changes or variations derived from still be in the protection scope of the utility model creation.

Claims

1. A turbocharger actuator comprising an actuator rocker arm and a bypass valve rocker arm, each of said rocker arms having a pin shaft, characterized in that, The utility model relates to a kind of turbine supercharger actuators, including: Pull rod, both ends of the pull rod are provided with through holes, a plurality of recesses are arranged on the inner wall of the through hole, the recesses are arranged uniformly around the circumference, the gear teeth-shaped protrusions are formed between adjacent recesses, both ends of the pull rod are rotatably connected to two pin shafts through the through holes respectively; Two plum-pudding spacers are provided, the two plum-pudding spacers are sleeved on the two pin shafts respectively, the side surface of the pin shaft is coaxially provided with an annular groove, one end of the plum-pudding spacer with small diameter is clamped in the annular groove, and one end of the plum-pudding spacer with large diameter is tightly pressed against the pull rod.

2. The turbocharger actuator of claim 1, wherein: The top of the protrusion is a flat surface or a circular arc surface matching the outer circular surface of the pin shaft.

3. The turbocharger actuator of claim 1, wherein: The diameter of the circle where the top of the protrusion is located matches the diameter of the pin shaft.

4. The turbocharger actuator of claim 1, wherein: The top of the pin shaft is provided with a chamfer.

5. The turbocharger actuator of claim 1, wherein: The pull rod includes a rod body and a connecting portion integrally formed at both ends of the rod body, the connecting portion is circular, and the through hole is coaxially provided on the connecting portion.

6. The turbocharger actuator of claim 5, wherein: The maximum diameter of the plum-pudding spacer is not greater than the diameter of the connecting portion.

7. The turbocharger actuator of claim 1, wherein: The pull rod and the pin shaft are made of stainless steel.

8. The turbocharger actuator of claim 1, wherein: The surface of the pin shaft is covered with a nickel-phosphorus coating or a nitriding coating.

9. The turbocharger actuator of claim 1, wherein: The plum-pudding spacer is made of stainless steel or manganese steel.

10. A turbocharger characterized by: The utility model relates to a kind of turbine supercharger actuators, including as claimed in any one of claims 1-9.

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