CN218644372U - Rocker arm and turbocharger with rocker arm - Google Patents
Rocker arm and turbocharger with rocker arm Download PDFInfo
- Publication number
- CN218644372U CN218644372U CN202223185607.0U CN202223185607U CN218644372U CN 218644372 U CN218644372 U CN 218644372U CN 202223185607 U CN202223185607 U CN 202223185607U CN 218644372 U CN218644372 U CN 218644372U
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- hole
- rocker arm
- bushing
- turbocharger
- valve rod
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
A rocker arm and a turbocharger with the rocker arm are provided, and the rocker arm comprises: straight through holes and step through holes are arranged at intervals along the longitudinal direction of the rocker arm; the axis of the through hole and the axis of the step through hole are parallel and are both vertical to the longitudinal direction; the through hole is used for connecting a transmission pin; the step through hole comprises a first hole part and a second hole part communicated with the first hole part, and the aperture of the second hole part is larger than that of the first hole part; the first hole part penetrates through the first side surface and the step surface of the rocker arm; the second hole part penetrates through the step surface and the second side surface of the rocker arm; the second hole part is used for allowing the end part of the valve rod to penetrate through and placing the end part of the bushing, and the bushing is sleeved outside the valve rod; the first hole part is used for the end part of the valve rod to pass through; the end part of the valve rod passes through the second hole part and the first hole part to be connected with the rocker arm; a first gap part is arranged between the longitudinal end surface of the end part of the bushing and the step surface; a second clearance portion is provided between a radially outer surface of the end portion of the bush and a radially inner wall of the second hole portion. The turbocharger includes a volute, a valve stem, a bushing, and a rocker arm.
Description
Technical Field
The utility model belongs to the technical field of turbo charger, concretely relates to rocking arm and have turbo charger of this rocking arm.
Background
The turbocharger technology is an important energy-saving means of the engine, can effectively improve the power of the engine and improve the fuel economy, particularly brings huge comprehensive benefits to people in the aspects of saving fuel, reducing emission and the like, and is one of the important development trends of the automobile engine in China in future. To ensure low speed torque of the engine, the turbine end of the turbocharger usually employs a turbine with small rotational inertia, i.e., a smaller diameter turbine; however, in order to ensure that the turbine does not fail due to overspeed when the engine is running at high speed, a waste gate valve is required at the turbine end to bypass excess exhaust gas, thereby reducing the load on the turbine. As shown in fig. 1 to 3, the conventional turbocharger includes a valve stem 1 and a bush 2, and exhaust gas cannot be completely sealed between the valve stem 1 and the bush 2 because the valve stem 1 and the bush 2 need to transmit motion. However, when the back pressure in the area of the turbocharger bypass valve is high, exhaust gas escapes from the gap between the valve stem 1 and the bush 2, and black smoke is easily sprayed directly onto the parts adjacent to the turbocharger by the high pressure, and causes the parts around the rocker arm 3 to be blackened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's weak point, provide a rocking arm and have turbo charger of this rocking arm.
In order to solve the technical problem, the utility model adopts the following technical scheme: a rocker arm, comprising: straight through holes and step through holes are arranged at intervals along the longitudinal direction of the rocker arm; the axial line of the through hole and the axial line of the step through hole are parallel and are both vertical to the longitudinal direction; the through hole is used for connecting a transmission pin; the step through hole comprises a first hole part and a second hole part communicated with the first hole part, and the diameter of the second hole part is larger than that of the first hole part; the first hole part penetrates through the first side surface and the step surface of the rocker arm; the second hole portion penetrates through the step surface and the second side surface of the rocker arm; the second hole part is used for allowing the end part of the valve rod to penetrate through and placing the end part of a bushing, and the bushing is sleeved outside the valve rod; the first hole portion is for the end portion of the valve rod to pass through; the end portion of the valve rod is connected with the rocker arm through the second hole portion and the first hole portion; a first gap part is arranged between the longitudinal end surface of the end part of the bushing and the step surface; a second clearance portion is provided between a radially outer surface of the end portion of the bushing and a radially inner wall of the second bore portion.
In a specific embodiment, a chamfered portion is provided at a peripheral side edge of the second hole portion remote from the step face.
In one embodiment, the first bore portion is a clearance fit with the valve stem.
In a particular embodiment, the rocker arm is provided in the form of a plate.
In a specific embodiment, the axial cross section of the through hole is circular, the axial cross section of the first hole portion is circular, the axial cross section of the second hole portion is circular, the longitudinal cross section of the valve rod is circular, and the longitudinal cross section of the bushing is circular.
A turbocharger, comprising: the scroll, the valve rod, the bushing and the rocker arm; the straight-through hole of the rocker arm is connected with a transmission pin; the first end part of the valve rod is connected with the rocker arm through the second hole part and the first hole part; the bushing is sleeved outside the valve rod; a first end portion of the bush is placed in the second hole portion, and a first clearance portion is provided between a longitudinal end face of the first end portion of the bush and the step face; a second clearance portion is provided between a radially outer surface of the first end portion of the bushing and a radially inner wall of the first hole portion; a second end of the liner is connected to the volute; the second end of the valve stem passes through the bushing to connect with a valve body in the volute.
In a specific embodiment, a flange portion is circumferentially provided on a radially outer surface of the first end portion of the bushing at a position close to the rocker arm.
In one embodiment, the ramp surface of the flange portion from a first side position adjacent the rocker arm to a second side position adjacent the volute is sloped to increase and decrease.
In a particular embodiment, the peripheral side edge of the first end of the bushing is provided with a further chamfer.
In a particular embodiment, the valve body includes a bypass valve.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a be provided with the step through-hole on the rocking arm, can be arranged in changing the radial surface of valve rod and the radial internal surface clearance of bush the direction of air current to increase the route of air current, reduced air pressure, thereby can prevent effectively that the air current from spouting the possibility with the adjacent part of turbo charger, prevent that the part around the rocking arm from being smoked black.
2. The utility model discloses a have chamfer portion on the second hole portion of rocking arm, place and fix the sealing washer when can be convenient for follow-up turbo charger leak hunting before serving to prevent that the sealing washer from drawing the damage.
3. The utility model discloses a turbo charger can change the direction of air current in the radial surface of valve rod and the radial internal surface clearance of bush to increase the route of air current, reduced air pressure, thereby can prevent effectively that the air current from spouting the possibility with the adjacent part of turbo charger.
4. The utility model discloses a circumference is provided with flange portion on turbocharger's the bush, can be convenient for guide and fix the sealing washer, and then the turbocharger of being convenient for is out of order before serving.
5. The utility model discloses a slope that domatic on turbocharger's flange portion reduces after being rised gradually again gradually, can be convenient for guide and fix the sealing washer to prevent to draw and damage the sealing washer, can increase the aesthetic property of flange portion simultaneously.
6. The utility model discloses a be provided with another chamfer portion on turbocharger's the first end of bush, can prevent that the first end of bush and the internal surface and the step face of second hole portion from producing and interfering, the security is good.
7. The utility model discloses a rocking arm and turbo charger, simple structure, convenient to use, market prospect is wide.
Drawings
FIG. 1 shows a schematic structural diagram of a particular embodiment of a turbocharger in the prior art;
FIG. 2 is a schematic block diagram illustrating one embodiment of the flow direction of a turbocharger in the prior art;
FIG. 3 illustrates a schematic structural view of one particular embodiment of a prior art rocker arm;
figure 4 shows a schematic structural view of a particular embodiment of the rocker arm of the present invention;
FIG. 5 shows a schematic structural diagram of one embodiment of a turbocharger of the present invention;
fig. 6 shows a schematic structural diagram of an embodiment of the present invention in a turbocharger.
Wherein, 1-valve stem; 2-a bushing; 21-a flange portion; 211-slope surface; 22-another chamfered portion; 3-a rocker arm; 31-straight through holes; 32-step through hole; 321-a first hole portion; 322-a second aperture portion; 323-step surface; 324-chamfered portion; 4-a drive pin; 5-a first gap portion; 6-a second gap portion; 7-volute.
Detailed Description
The invention will be further described with reference to the following examples, which are illustrated in the accompanying drawings.
Directional phrases used in this disclosure, such as "inner," "outer," "longitudinal," "transverse," and the like, refer only to the attached figures. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way intended to be limiting.
As shown in fig. 4 to 6, the rocker arm of the present invention is used for a turbocharger. The rocker arm 3 includes: the straight through holes 31 and the step through holes 32 are arranged at intervals along the longitudinal direction of the rocker arm 3, so that the structure is simple, and the use is convenient.
The axis of the through hole 31 and the axis of the stepped through hole 32 are parallel and perpendicular to the longitudinal direction of the rocker arm 3. The through-going bore 31 is used for connecting the driving pin 4.
The stepped through-hole 32 includes a first hole portion 321 and a second hole portion 322 communicating with the first hole portion 321. The second hole portion 322 has a larger diameter than the first hole portion 321. The first hole 321 longitudinally penetrates the first side surface of the rocker arm 3 and the step surface 323. The second bore portion 322 extends longitudinally through the step surface 323 and the second side surface of the rocker arm 3.
The second hole portion 322 is used for allowing the end of the valve rod 1 to pass through and placing the end of the bushing 2, and the bushing 2 is sleeved outside the valve rod 1. The first hole portion 321 is for passing an end of the valve stem 1 therethrough. The end of the valve stem 1 is connected to the swing arm 3 through the second hole portion 322 and the first hole portion 321. A first clearance portion 5 is provided between the longitudinal end surface of the end portion of the bush 2 and the step surface 323. A second clearance portion 6 is provided between a radially outer surface of an end portion of the bush 2 and a radially inner wall of the second hole portion 322.
When the valve rod is used, the first end of the valve rod 1 penetrates through the second hole portion 322 and the first hole portion 321 to be connected with the rocker arm 3, the bushing 2 is sleeved outside the valve rod 1, the first end of the bushing 2 is placed in the second hole portion 322, the direction of airflow in a gap between the radial outer surface of the valve rod 1 and the radial inner surface of the bushing 2 can be changed by utilizing the first gap portion 5 and the second gap portion 6, the airflow path can be increased, the airflow pressure is reduced, the possibility that airflow is sprayed to parts adjacent to a turbocharger after the back pressure of the turbocharger bypass valve area is increased can be effectively prevented, and the parts around the rocker arm 3 are prevented from being blackened.
In a specific embodiment, as shown In fig. 4, a chamfered portion 324 is provided at the peripheral edge of the second hole portion 322 away from the stepped surface 323, so as to facilitate placing and fixing of the seal ring during BIS (Before Service) leak detection of the subsequent turbocharger and prevent the seal ring from being scratched. As an example, the sealing ring comprises an O-shaped sealing ring, so that the structure is simple and the use is convenient.
In one embodiment, as shown in fig. 5 and 6, the first hole 321 is in clearance fit with the valve stem 1, so that the valve stem 1 can pass through the first hole 321 and be connected with the rocker arm 3.
In a specific embodiment, as shown in fig. 4 to 6, the rocker arm 3 is provided in a plate shape, and has a simple structure and is convenient to use.
In a specific embodiment, as shown in fig. 4 to 6, the axial section of the through hole 31 is circular, the axial section of the first hole portion 321 is circular, the axial section of the second hole portion 322 is circular, the longitudinal section of the valve stem 1 is circular, and the longitudinal section of the bushing 2 is circular, so that the structure is simple and the use is convenient.
In a particular embodiment, the gas stream comprises an exhaust gas stream.
On the basis of the above embodiments, as shown in fig. 4 to 6, the turbocharger of the present invention includes: a volute 7, a valve rod 1, a bushing 2 and the rocker arm. The through hole 31 of the rocker arm 3 is connected with the driving pin 4. The first end of the valve stem 1 is connected to the rocker arm 3 through the second hole portion 322 and the first hole portion 321. The bush 2 is sleeved outside the valve rod 1. The first end of the bush 2 is placed in the second hole portion 322 with a first clearance portion 5 provided between the longitudinal end surface of the first end of the bush 2 and the step surface. A second clearance portion 6 is provided between a radially outer surface of the first end portion of the bush 2 and a radially inner wall of the first hole portion 321. The second end of the liner 2 is connected to the volute 7. The second end of the valve stem 1 is connected to the valve body in the volute 7 through the bushing 2. When the valve is used, the first gap part 5 and the second gap part 6 can change the direction of airflow in the gap between the radial outer surface of the valve rod 1 and the radial inner surface of the bushing 2, increase the path of the airflow and reduce the pressure of the airflow, so that the possibility that the airflow is sprayed to parts adjacent to a turbocharger after the backpressure of the bypass valve area of the turbocharger is increased can be effectively prevented, and parts around the rocker arm 3 are prevented from being blackened.
In a specific embodiment, as shown in fig. 5 and 6, a flange portion 21 is circumferentially provided on the radially outer surface of the first end portion of the bushing 2 at a position close to the rocker arm 3, so as to facilitate guiding and fixing of the sealing ring, and further facilitate leakage detection before subsequent service of the turbocharger.
In one embodiment, as shown in fig. 5 and 6, the slope 211 of the flange 21 from the first side near the rocker arm 3 to the second side near the scroll 7 gradually increases and then gradually decreases, so as to facilitate guiding and fixing the sealing ring, prevent the sealing ring from being scratched, and improve the aesthetic appearance of the flange 21.
In a specific embodiment, as shown in fig. 5 and 6, another chamfered portion 22 is provided at the circumferential edge of the first end portion of the bush 2, so that the first end portion of the bush 2 can be prevented from interfering with the inner surface of the second hole portion 322 and the stepped surface 323, and the safety is high.
In one particular embodiment, the valve body includes a bypass valve that facilitates bypassing excess exhaust gas within the turbocharger.
The utility model discloses during the use, place the first end of bush 2 in second hole portion 322, utilize second hole portion 322 and step 323 and first clearance portion 5 and second clearance portion 6 can change the direction of air current in the radial surface clearance of the radial surface of valve rod 1 and bush 2, and increase the route of air current, the air pressure has been reduced, thereby can prevent effectively that the air current spouts the possibility of the adjacent part with turbo charger behind the regional backpressure increase of turbo charger bypass valve, prevent that the part around 3 rocking arm from being smoked black.
The scope of the present invention is not limited to the above-described embodiments, and it is obvious that those skilled in the art can make various modifications and variations to the present invention without departing from the scope and spirit of the present invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A turbocharger rocker arm, comprising: straight-through holes (31) and step through holes (32) which are arranged at intervals along the longitudinal direction of the rocker arm (3);
the axis of the through hole (31) and the axis of the stepped through hole (32) are parallel and are both perpendicular to the longitudinal direction; the through hole (31) is used for connecting a driving pin (4);
the stepped through-hole (32) includes a first hole portion (321) and a second hole portion (322) communicating with the first hole portion (321), the second hole portion (322) having a larger hole diameter than the first hole portion (321); the first hole (321) penetrates through a first side surface of the rocker arm (3) and a step surface (323); the second hole portion (322) penetrates through the step surface (323) and the second side surface of the rocker arm (3);
the second hole part (322) is used for allowing the end part of the valve rod (1) to penetrate through and placing the end part of the bushing (2), and the bushing (2) is sleeved outside the valve rod (1); the first hole portion (321) is used for the end of the valve rod (1) to pass through; the end portion of the valve rod (1) is connected with the rocker arm (3) through the second hole portion (322) and the first hole portion (321); a first gap part (5) is arranged between the longitudinal end surface of the end part of the bushing (2) and the step surface (323); a second clearance portion (6) is provided between a radially outer surface of the end portion of the bush (2) and a radially inner wall of the second hole portion (322).
2. The rocker arm of a turbocharger according to claim 1, wherein a chamfered portion (324) is provided at a peripheral side edge of the second bore portion (322) remote from the step surface (323).
3. The turbocharger rocker arm according to claim 1, wherein the first bore portion (321) is a clearance fit with the valve stem (1).
4. The turbocharger rocker arm according to claim 1, characterized in that the rocker arm (3) is provided in the shape of a plate.
5. The turbocharger rocker arm according to claim 1, wherein the through hole (31) has a circular axial cross-section, the first bore portion (321) has a circular axial cross-section, the second bore portion (322) has a circular axial cross-section, the valve stem (1) has a circular longitudinal cross-section, and the bushing (2) has an annular longitudinal cross-section.
6. A turbocharger, characterized in that it comprises: -a volute (7), a valve stem (1), a bushing (2) and a rocker arm according to any one of claims 1 to 5; the straight-through hole (31) of the rocker arm (3) is connected with a transmission pin (4); the first end part of the valve rod (1) passes through the second hole part (322) and the first hole part (321) and is connected with the rocker arm (3); the bushing (2) is sleeved outside the valve rod (1); a first end of the bush (2) is placed in the second hole portion (322) and a first gap portion (5) is provided between a longitudinal end surface of the first end of the bush (2) and the step surface (323); a second clearance portion (6) is arranged between the radial outer surface of the first end portion of the bushing (2) and the radial inner wall of the first hole portion (321); the second end of the liner (2) is connected with the volute (7); the second end of the valve rod (1) penetrates through the bushing (2) to be connected with the valve body in the volute (7).
7. The turbocharger according to claim 6, wherein a flange portion (21) is circumferentially provided on a radially outer surface of the first end portion of the bushing (2) at a position close to the rocker arm (3).
8. The turbocharger according to claim 7, wherein the slope surface (211) of the flange portion (21) increases gradually and then decreases gradually from a first side position of the flange portion close to the rocker arm to a second side position of the flange portion close to the volute.
9. A turbocharger according to claim 6, wherein a further chamfer (22) is provided at a peripheral side edge of the first end of the bushing (2).
10. The turbocharger of claim 6, wherein the valve body comprises a bypass valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223185607.0U CN218644372U (en) | 2022-11-29 | 2022-11-29 | Rocker arm and turbocharger with rocker arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223185607.0U CN218644372U (en) | 2022-11-29 | 2022-11-29 | Rocker arm and turbocharger with rocker arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218644372U true CN218644372U (en) | 2023-03-17 |
Family
ID=85499266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223185607.0U Active CN218644372U (en) | 2022-11-29 | 2022-11-29 | Rocker arm and turbocharger with rocker arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218644372U (en) |
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2022
- 2022-11-29 CN CN202223185607.0U patent/CN218644372U/en active Active
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