CN213899587U

CN213899587U - Kinematics component of turbocharger

Info

Publication number: CN213899587U
Application number: CN202022580919.6U
Authority: CN
Inventors: 赵宗立; 刘瑞颜; 曹文跃
Original assignee: Boma Technology Shanghai Co ltd
Current assignee: Boma Technology Shanghai Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-06
Anticipated expiration: 2030-11-10

Abstract

The utility model discloses a kinematic assembly of a turbocharger, which is arranged on a kinematic joint of the turbocharger to reduce the axial clearance of the kinematic joint, is convenient to manufacture and assemble, has compact structure, and is firm and durable; the turbocharger comprises a kinematic joint formed by a connecting rod, an actuating rod and a connecting pin, wherein the kinematic joint comprises a C-shaped retaining ring, and the C-shaped retaining ring is sleeved on the connecting pin and is positioned in an axial gap between an end cap of the connecting pin and the end part of the connecting rod; wherein, C shape retaining ring includes the retaining ring body, and a plurality of support archs are located to the back of retaining ring body, and the retaining ring body middle part is located with the arc assembly surface of connecting pin, is equipped with the opening that is connected to the arc assembly surface on the retaining ring body.

Description

Kinematics component of turbocharger

Technical Field

The utility model relates to a turbo charger technical field, concretely relates to install kinematics joint in order to reduce kinematics joint axial gap's kinematics subassembly at turbo charger's kinematics.

Background

A turbocharger is actually an air compressor that increases the intake air amount by compressing air; the turbocharger comprises a compressor assembly and a turbine assembly; the compressor assembly comprises a compressor shell and a pressure wheel arranged in the compressor shell, and the turbine assembly comprises a turbine shell and a turbine arranged in the turbine shell, an electric actuator, a connecting rod, an actuating rod, a connecting pin and a turbine assembly; one end of the connecting rod is connected with one end of one executing rod through the connecting pin (forming a first kinematic joint), the other end of one executing rod is connected with the electric actuator, the other end of the connecting rod is connected with one end of the other executing rod through the connecting pin (forming a second kinematic joint), the other end of the other executing rod is connected with the turbine assembly, the actuator drives the turbine assembly through the kinematic joint, and therefore the turbine is adjusted through a waste gate or a variable turbine, and the speed of the exhaust turbocharger is controlled.

However, since the turbocharger is liable to generate noise and vibration at the kinematic joint during operation, a damper is required to be provided at the kinematic joint to prevent the noise and vibration.

Prior patent US2015377119a1 discloses a spring clip that is mounted on a kinematic joint of a turbocharger. The spring clamp comprises two spring rings connected via a bracket, which can be clamped on the connecting pin in the axial direction, thereby fixing the connecting rod on the connecting pin while eliminating axial play of the joint.

Prior patent US9234455B2 discloses a U-shaped resilient member for use on a kinematic joint of a turbocharger, which resilient member is provided with various projections to reduce wear due to axial clearance.

Prior patent US4886408A discloses an arcuate C-ring clip with rounded ends to reduce wear on the abutment surfaces that can provide a preload to the joint and thus eliminate play of the joint, while also acting as a snap ring to secure the components of the joint.

Prior patent EP3034832B1 discloses a C-ring clip that is a combination of a disc spring and a retainer and thus allows reducing play in the kinematic joint of a turbocharger while fixing/fastening the components of the joint.

The above prior patents have the following disadvantages:

the shape, manufacturing process and assembly of the spring clip disclosed in US2015377119a1 are relatively complex; it requires bending and stamping of the spring element to produce the final spring clip; at the same time, during assembly, the spring clip needs to be installed from both sides, one of which is most likely on the side facing downwards of the worker performing the assembly;

the U-shaped resilient member disclosed in US9234455B2 also requires a relatively complicated assembly process, since it requires insertion of a pin to one side of the spring member, while it requires attachment of the other side of the spring member to the other side of the pin of the joint.

Although a C-ring clamp using a simple arch is disclosed in US4886408A, the contact surface (in fact the wire) is relatively small and may still cause some wear over the life of the turbocharger.

It is disclosed in EP3034832B1 to alleviate the disadvantages present in US4886408A by increasing the contact surface of the C-ring clip. However, this design is only useful when there is a large offset between the receiving recess on the link pin and the contact surface on the link; in some cases, a more compact design may be advantageous.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a kinematic assembly which is arranged on the kinematic joint of the turbocharger and used for reducing the axial clearance of the kinematic joint, which is convenient to manufacture and assemble and can reduce the clearance of the joint; meanwhile, the structure is compact, firm and durable.

The utility model discloses a kinematics component of a turbocharger, the turbocharger comprises a kinematics joint composed of a connecting rod, an actuating rod and a connecting pin, the kinematics component comprises a C-shaped retaining ring, the C-shaped retaining ring is sleeved on the connecting pin and is positioned in an axial gap between an end cap of the connecting pin and the end part of the connecting rod; that is, the end cap of the connecting pin is provided with an annular groove in which the fitting surface of the C-shaped retainer ring is disposed, thereby forming a gap between the C-shaped body and the end of the connecting rod;

the C-shaped check ring comprises a check ring body, a plurality of supporting protrusions are arranged on the back of the check ring body towards the end part of the connecting rod, at least two arc-shaped assembling surfaces connected to the annular groove of the end cap located on the connecting pin are arranged on the check ring body, and an opening of the C-shaped check ring is formed between the two arc-shaped assembling surfaces.

As a further improvement, the back of the retainer ring body is provided with at least two supporting protrusions and the two supporting protrusions are located on the two sides of the opening of the C-shaped retainer ring, and the bottoms of the two supporting protrusions are in the same plane.

As a further improvement of the utility model, the number of the supporting protrusions is three, and the spherical protrusions or the plane protrusions of the supporting protrusions are convex.

As a further improvement of the utility model, the spherical bulge or the plane bulge is formed by the downward stamping of the top surface of the retainer ring body.

As a further improvement of the utility model, the height of the supporting protrusion is smaller than the axial gap.

As a further improvement of the utility model, the height of the supporting protrusion is 0.4-0.6 times of the axial gap.

As a further improvement, the assembly surface is in clearance fit with the outer wall of the annular groove of the connecting pin, the opening is an open structure which is contracted from outside to inside, and the inner small caliber of the opening is smaller than the outer diameter of the connecting pin.

As a further improvement, the inner side of the retainer ring body is corresponding to the opening position is provided with a limiting protrusion pointing to the opening direction.

As a further improvement of the utility model, the end part of the limiting bulge and the assembling surface are positioned in the same cambered surface.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a kinematics that the C shape retaining ring was installed at turbo charger connects in order to reduce kinematics and connect the axle clearance, and conveniently makes and assemble compact structure, sturdy and durable.

Drawings

Fig. 1 is a schematic structural diagram of a turbocharger according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of the disclosed kinematic joint of one embodiment of FIG. 1;

FIG. 3 is a schematic view of the C-shaped retainer ring of FIG. 2; wherein, a is a front view and b is a back view;

FIG. 4 is a partial schematic view of the disclosed kinematic joint of another embodiment of FIG. 1;

FIG. 5 is a schematic view of the C-shaped retainer ring of FIG. 4; wherein, a is a front view and b is a back view;

fig. 6 is a cross-sectional view of fig. 2 or 4.

In the figure:

1. a compressor housing; 2. a turbine housing; 3. an electric actuator; 4. a connecting rod; 5. an actuating lever; 6. a connecting pin;

10. a C-shaped retainer ring; 11. a retainer ring body; 12. a support boss; 13. a limiting bulge; 14. an opening; 15. and (7) assembling surfaces.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1, the utility model provides a kinematics subassembly of turbocharger, turbocharger includes compressor housing 1, turbine housing 2, electric actuator 3, connecting rod 4, actuating lever 5 and connecting pin 6, the kinematics that connecting rod 4, actuating lever 5 and connecting pin 6 constitute connects, connecting rod 4 and actuating lever 5 pass through connecting pin 6 to be connected promptly, be formed with the axial clearance after connecting the both ends end cap of back connecting rod 4, actuating lever 5 and connecting pin 6, this axial clearance is the key problem place that causes kinematics to connect noise and vibration. In order to solve the problems, the kinematics component adopted by the utility model comprises a C-shaped retainer ring 10, the C-shaped retainer ring 10 is sleeved on the connecting pin 6 and is positioned in the axial gap between the end cap of the connecting pin 6 and the end part of the connecting rod 4; as shown in fig. 6, the end cap of the connecting pin is provided with an annular groove in which the fitting surface of the C-shaped retainer ring is disposed, thereby forming a gap between the C-shaped body and the end of the connecting rod.

As shown in fig. 2 and 3, the C-shaped retainer ring 10 of the present invention includes a retainer ring body 11, wherein the top (top surface) and the bottom (bottom surface) of the retainer ring body 11 are arranged in parallel; the back of the retainer ring body 11 is provided with at least three supporting bulges 12, the preferred number of the supporting bulges 12 is three, and the three supporting bulges 12 are annularly and uniformly distributed on the retainer ring body 11, namely are respectively arranged at the two ends and the middle part of the retainer ring body 11, wherein the two supporting bulges are positioned at the two sides of the opening of the C-shaped retainer ring, one supporting bulge is positioned at the middle position of the bottom of the C-shaped retainer ring, and the three supporting bulges are annularly and uniformly distributed at the bottom of the C-shaped surface of the retainer ring body 11; the three supporting bulges 12 are spherical bulges, and the bottoms of the spherical bulges are positioned in the same horizontal plane; further, the spherical projection is punched downward from the top surface of the retainer body 11 as shown by a, b in fig. 3.

In order to avoid excessive forces during the assembly process, the height of the support projection is smaller than the axial gap; preferably, the height of the supporting protrusion is 0.4-0.6 times of the axial gap.

The retainer ring body of the utility model is provided with at least two arc-shaped assembling surfaces which are connected to the annular groove of the end cap of the connecting pin, and an opening 14 of the C-shaped retainer ring is formed between the two arc-shaped assembling surfaces; the assembling surface 15 is in clearance fit with the outer wall of the connecting pin 6, the opening 14 is of an opening structure which is contracted from outside to inside, and the small caliber of the inner side of the opening 14 is not larger than the outer diameter of the connecting pin 6; furthermore, a limiting bulge 13 is arranged at the position, corresponding to the opening 14, on the inner side of the retainer ring body 11, and the pointing direction or the middle part of the retainer ring body 11 is on the same plane; preferably, the end of the limiting protrusion 13 is in the same arc with the assembling surface 15, so as to prevent the retainer body 11 from separating from the arc assembling surface 15.

In the assembly process of a turbocharger, an actuator rod or link driven by some type of actuator (typically an electric actuator) is connected to a mounted connecting pin, which in turn is connected to a link that rotates an axle to drive a variable geometry turbine or wastegate valve. After the kinematic components are loosely connected, the C-ring clamp is inserted into an axial gap provided, for example, on one end of the pin to secure the coupling rod to the connecting pin.

Example 2:

as shown in fig. 4 and 5, the C-shaped retainer ring 10 of the present invention differs from embodiment 1 in that the supporting protrusions 12 are planar protrusions, preferably two supporting protrusions having arc-shaped contact surfaces and one supporting protrusion having an axially symmetrical shape like a parabola, which enlarges the protruding contact surfaces of the clip in such a manner that the protrusions extend over the entire width of the C-shaped clip; the planar protrusions are punched downward from the top surface of the retainer body 11 as shown by a, b in fig. 5.

The utility model has the advantages that:

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A kinematic assembly of a turbocharger, the turbocharger comprising a kinematic joint constituted by a connecting rod, an actuating rod and a connecting pin, characterized in that the kinematic assembly comprises a C-shaped retaining ring, the C-shaped retaining ring being fitted on the connecting pin and being located in an axial gap between an end cap of the connecting pin and an end of the connecting rod; that is, the end cap of the connecting pin is provided with an annular groove in which the fitting surface of the C-shaped retainer ring is disposed, thereby forming a gap between the C-shaped body and the end of the connecting rod;

2. The kinematic assembly of claim 1, wherein the back of the retainer body is provided with at least two support protrusions and the two support protrusions are located on both sides of the opening of the C-shaped retainer, and the bottoms of the two support protrusions are in the same plane.

3. A kinematic assembly according to claim 2, characterized in that the number of said supporting protrusions is three, spherical or planar.

4. A kinematic assembly according to claim 3, in which the spherical or planar protrusions are punched downwards from the top face of the collar body.

5. A kinematic assembly according to claim 1, characterized in that the height of the support projections is smaller than the axial clearance.

6. A kinematic assembly according to claim 5, characterized in that the height of the support protrusions is between 0.4 and 0.6 times the axial clearance.

7. The kinematic assembly according to claim 1, wherein the fitting surface is in clearance fit with an outer wall of the annular groove of the connecting pin, the opening is of an open structure that is contracted from outside to inside, and an inner minor diameter of the opening is smaller than an outer diameter of the connecting pin.

8. The kinematic assembly according to claim 1, wherein a limiting protrusion pointing in the direction of the opening is provided on the inner side of the retainer body at a position corresponding to the opening.

9. The kinematic assembly of claim 8, wherein the ends of the stop projections lie in the same arc as the mounting surface.