CN214007254U - Crankshaft vertical type valve actuating mechanism - Google Patents
Crankshaft vertical type valve actuating mechanism Download PDFInfo
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- CN214007254U CN214007254U CN202022986458.2U CN202022986458U CN214007254U CN 214007254 U CN214007254 U CN 214007254U CN 202022986458 U CN202022986458 U CN 202022986458U CN 214007254 U CN214007254 U CN 214007254U
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- rocker arm
- camshaft
- valve
- crankshaft
- lower rocker
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Abstract
The utility model provides a crankshaft vertical type valve actuating mechanism, which relates to the technical field of valve actuating mechanisms and comprises a valve group, an upper rocker arm group, a lower rocker arm group, a camshaft and a crankshaft; the valve group at least comprises an intake valve and an exhaust valve; the upper rocker arm group at least comprises two upper rocker arms, and one end of each upper rocker arm is respectively connected with each inlet valve and each exhaust valve; the lower rocker arm group at least comprises two lower rocker arms, each lower rocker arm is rotatably connected to the same rotating shaft, one end of each lower rocker arm is connected with the camshaft, the other end of each lower rocker arm is respectively connected with one end of each upper rocker arm, which is far away from each valve, through each air inlet push rod and each air outlet push rod, and the air inlet push rods and the air outlet push rods are positioned on the same side of the rotating shaft; the crankshaft is perpendicular to the axes of the upper rocker arms, and the crankshaft is connected with the camshaft and used for driving the camshaft to rotate. The problem that the adaptability of a crankshaft vertical type valve actuating mechanism in the prior art is poor is solved.
Description
Technical Field
The utility model belongs to the technical field of the valve train technique and specifically relates to a bent axle rectilinear valve train is related to.
Background
The engine valve actuating mechanism is to open and close the inlet and outlet valves of each cylinder at regular time according to the requirements of the working cycle and the ignition sequence in each cylinder of the engine; the crankshaft of the traditional valve actuating mechanism is mostly parallel to the rotating axis of the valve; in order to realize the light weight and miniaturization of the engine, in the prior art, some enterprises design and develop a crankshaft vertical engine, a crankshaft of the engine is vertical to the rotating axis of an air valve, and a lower-arranged cam shaft is adopted to directly push a push rod to realize the pushing of the air valve; however, because the camshaft is arranged below and directly connected with the push rod, the push rod is long in length, so that the rigidity and the strength of the push rod are poor, the camshaft is not suitable for a large-load and high-speed engine, and the adaptability of the valve actuating mechanism is poor.
SUMMERY OF THE UTILITY MODEL
To the not enough that exists among the prior art, the utility model provides a bent axle rectilinear valve mechanism, it has solved the relatively poor problem of bent axle rectilinear valve mechanism adaptability among the prior art.
According to an embodiment of the utility model, a crankshaft vertical type valve actuating mechanism comprises a valve group, an upper rocker arm group, a lower rocker arm group, a camshaft and a crankshaft; the valve group at least comprises an intake valve and an exhaust valve; the upper rocker arm group at least comprises two upper rocker arms, and one end of each upper rocker arm is respectively connected with each intake valve and each exhaust valve; the lower rocker arm group at least comprises two lower rocker arms, each lower rocker arm is rotatably connected to the same rotating shaft, one end of each lower rocker arm is connected with the camshaft, the other end of each lower rocker arm is respectively connected with one end of each upper rocker arm, which is far away from each valve, through each air inlet push rod and each air exhaust push rod, and the air inlet push rods and the air exhaust push rods are positioned on the same side of the rotating shaft; the crankshaft is perpendicular to the axes of the upper rocker arms, and the crankshaft is connected with the camshaft and used for driving the camshaft to rotate.
Compared with the prior art, the utility model discloses following beneficial effect has: because the crankshaft is perpendicular to the axes of the upper rocker arms, the camshaft is arranged below and the push rod is adopted to drive the opening and closing of the valve, the arrangement of parts is convenient, and the light weight and the miniaturization of the power machine are convenient to realize; one end of the lower rocker arm group is connected with the cam shaft, the other end of the lower rocker arm group is connected with the upper rocker arm group through the air inlet push rod and the air exhaust push rod, the air inlet push rod and the air exhaust push rod are arranged on the same side of the rotating shaft, the cam shaft drives the lower rocker arm group to rotate as required, so that the air inlet push rod and the air exhaust push rod move upwards, and the air inlet push rod and the air exhaust push rod drive the air valve to rotate around the upper rocker arm group to open the air valve; therefore, by adopting the scheme, the lower rocker arm set is additionally arranged between the upper rocker arm set and the camshaft, so that the length of the push rod is shortened, the quality of the push rod is reduced, and the push rod is more suitable for engines with large load, high speed and high reliability.
Furthermore, each lower rocker arm is L-shaped, the vertex of each lower rocker arm is rotatably connected to the rotating shaft, and the intersection of the two sides of each lower rocker arm is in arc transition.
Furthermore, a reinforcing part is fixedly arranged at one end, facing the camshaft, of each lower rocker arm, and a bending part is arranged at one side, away from the camshaft, of each reinforcing part.
Furthermore, the camshaft is provided with at least one air inlet convex hull and one air outlet convex hull, one side of each reinforcing part facing the camshaft is a convex arc-shaped transition surface, and each arc-shaped transition surface is respectively opposite to each air inlet convex hull and each air outlet convex hull.
Furthermore, a hemispherical bracket is fixedly arranged at one end of each lower rocker arm, which is far away from the camshaft, and one end of each air inlet push rod and one end of each exhaust push rod are spherical and are respectively embedded into each bracket.
Furthermore, a sleeve is fixedly arranged at the vertex of each lower rocker arm, each sleeve is sleeved on the rotating shaft, and one end of each adjacent sleeve opposite to the other end of each sleeve is in contact with the corresponding sleeve.
The crankshaft and the camshaft are respectively sleeved and fixed with a third gear and a fourth gear, the third gear is meshed with the first gear, and the fourth gear is meshed with the second gear.
Further, the intermediate shaft is a balance shaft.
Drawings
Fig. 1 is a first perspective view of an embodiment of the present invention;
FIG. 2 is a second perspective view of the embodiment of the present invention;
fig. 3 is a partially enlarged view of a portion a of fig. 1.
In the above drawings: 1. an intake valve; 2. an exhaust valve; 3. an upper rocker arm; 4. a lower rocker arm; 401. a reinforcing portion; 402. a bending section; 403. a bracket; 404. a sleeve; 5. a rotating shaft; 6. a camshaft; 601. an air inlet convex hull; 602. an exhaust convex hull; 7. an air inlet push rod; 8. an exhaust push rod; 9. an intermediate shaft; 10. a first gear; 11. a second gear; 12. a fourth gear.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a crankshaft vertical type valve actuating mechanism, which includes a valve group, an upper rocker arm group, a lower rocker arm group, a camshaft 6 and a crankshaft; the valve group at least comprises an inlet valve 1 and an exhaust valve 2; the upper rocker arm group at least comprises two upper rocker arms 3, and one end of each upper rocker arm 3 is respectively connected with each intake valve 1 and each exhaust valve 2; the lower rocker arm group at least comprises two lower rocker arms 4, each lower rocker arm 4 is rotatably connected to the same rotating shaft 5, one end of each lower rocker arm 4 is connected with the cam shaft 6, the other end of each lower rocker arm 4 is respectively connected with one end of each upper rocker arm 3 deviating from each valve through each air inlet push rod 7 and each air exhaust push rod 8, and the air inlet push rods 7 and the air exhaust push rods 8 are positioned on the same side of the rotating shaft 5; the crankshaft (not shown in the figure) is perpendicular to the axis of each upper rocker arm 3, and the crankshaft is connected with the camshaft 6 and is used for driving the camshaft 6 to rotate; in the practical use process, the air inlet valve 1 and the exhaust valve 2 can be respectively assembled on a cylinder cover of an engine, the rotating shaft 5 is assembled on a cylinder body, and the two ends of the lower camshaft 6 and the balance shaft are respectively supported on a crankcase; the specific structures and connection modes of the cylinder body, the cylinder cover, the upper rocker arm group and the valve group are conventional technical means in the field, and are not described again here.
Because the crankshaft is perpendicular to the axes of the upper rocker arms 3, the camshaft 6 is arranged below and the push rod is adopted to drive the opening and closing of the valve, the arrangement of parts is convenient, and the light weight and the miniaturization of the engine are convenient to realize; one end of the lower rocker arm group is connected with the cam shaft 6, the other end of the lower rocker arm group is connected with the upper rocker arm group through the air inlet push rod 7 and the air exhaust push rod 8, the air inlet push rod 7 and the air exhaust push rod 8 are arranged on the same side of the rotating shaft 5, the cam shaft 6 drives the lower rocker arm group to rotate as required, so that the air inlet push rod 7 and the air exhaust push rod 8 move upwards, and the air inlet push rod 7 and the air exhaust push rod 8 drive the air valve to rotate around the upper rocker arm group to open the air valve; therefore, by adopting the scheme, the lower rocker arm set is additionally arranged between the upper rocker arm set and the camshaft 6, so that the length of the push rod is shortened, the quality of the push rod is reduced, and the push rod is more suitable for engines with large load, high speed and high reliability.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a crankshaft vertical type valve actuating mechanism, each of the lower rocker arms 4 is L-shaped, and the vertex thereof is rotatably connected to the rotating shaft 5, and the intersection of two edges of each of the lower rocker arms 4 is in arc transition; by adopting the scheme, the lower rocker arm 4 is simple and convenient to manufacture in structure and high in strength.
As shown in fig. 1 and fig. 3, in order to further enhance the strength of the lower rocker arm 4, a reinforcing portion 401 is fixedly disposed on one end of each lower rocker arm 4 facing the camshaft 6, the reinforcing portion 401 is block-shaped, the axial width of the reinforcing portion 401 along the camshaft 6 is greater than the axial width of the lower rocker arm 4, and a bending portion 402 is disposed on one side of each reinforcing portion 401 away from the camshaft 6; when the lower rocker arm 4 bears the impact load of the camshaft 6, the reinforcing part 401 and the bent part 402 reinforce the lower rocker arm 4, and the impact resistance of the lower rocker arm 4 is improved.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a crankshaft vertical type valve actuating mechanism, wherein at least one air inlet convex hull 601 and one air outlet convex hull 602 are arranged on the camshaft 6, one side of each of the reinforcing portions 401 facing the camshaft 6 is a convex arc transition surface, and each of the arc transition surfaces respectively faces each of the air inlet convex hull 601 and the air outlet convex hull 602; adopt above-mentioned scheme, can adjust the linearity of the convex closure 601 and the convex closure 602 of exhausting according to the operating mode of difference alone, when the convex closure contacts with rib 401 and drives down rocking arm 4 and rotate, arc transition surface makes the transition of convex closure and lower rocking arm 4 more steady, alleviates the impact and the rocking of device.
As shown in fig. 2 and fig. 3, an embodiment of the present invention provides a crankshaft vertical type valve actuating mechanism, a hemispherical bracket 403 is fixedly disposed at one end of each lower rocker arm 4 departing from the camshaft 6, and one end of each intake push rod 7 and one end of each exhaust push rod 8 are both spherical and are respectively embedded in each bracket 403; by adopting the scheme, the rotation of the lower rocker arm 4 is convenient to realize, so that the push rod is pushed to move upwards, and one end of the push rod can rotate in the bracket 403.
As shown in fig. 1 and fig. 3, an embodiment of the present invention provides a crankshaft vertical type valve actuating mechanism, a sleeve 404 is fixedly disposed at a vertex of each lower rocker arm 4, each sleeve 404 is sleeved on the rotating shaft 5, and opposite ends of two adjacent sleeves 404 are in contact; by adopting the scheme, the lower rocker arm 4 is rotatably connected with the rotating shaft 5, and because the two adjacent opposite ends of the sleeve 404 are in contact, the lower rocker arm 4 can be conveniently positioned.
As shown in fig. 1 and 2, an embodiment of the present invention provides a crankshaft vertical type valve actuating mechanism, further including an intermediate shaft 9, an axis of the intermediate shaft 9 is parallel to the crankshaft and the camshaft 6, two ends of the intermediate shaft 9 are respectively sleeved and fixed with a first gear 10 and a second gear 11, the crankshaft and the camshaft 6 are respectively sleeved and fixed with a third gear (not shown in the drawings) and a fourth gear 12, the third gear is engaged with the first gear 10, the fourth gear 12 is engaged with the second gear 11, a transmission ratio of the first gear 10 to the third gear is 1:1, and a transmission ratio of the second gear 11 to the fourth gear 12 is 1: 2; by adopting the scheme, the gear transmission of the crankshaft and the camshaft 6 is realized through the intermediate shaft 9, the transmission is reliable, the structure is compact, and the rotation directions of the crankshaft and the camshaft 6 are the same.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a crankshaft vertical type valve actuating mechanism, wherein the intermediate shaft 9 is a balance shaft; the balance shaft is used as the intermediate shaft 9, so that the structure of the engine is more compact, and the space utilization rate is higher.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (8)
1. The utility model provides a bent axle rectilinear valve actuating mechanism which characterized in that: comprises a valve group, an upper rocker arm group, a lower rocker arm group, a camshaft (6) and a crankshaft;
the valve group at least comprises an inlet valve (1) and an exhaust valve (2);
the upper rocker arm group at least comprises two upper rocker arms (3), and one end of each upper rocker arm (3) is respectively connected with each intake valve (1) and each exhaust valve (2);
the lower rocker arm group at least comprises two lower rocker arms (4), each lower rocker arm (4) is rotatably connected to the same rotating shaft (5), one end of each lower rocker arm (4) is connected with the cam shaft (6), the other end of each lower rocker arm is respectively connected with one end of each upper rocker arm (3) deviating from each valve through each air inlet push rod (7) and each exhaust push rod (8), and the air inlet push rods (7) and the exhaust push rods (8) are positioned on the same side of the rotating shaft (5);
the crankshaft is perpendicular to the axis of each upper rocker arm (3), and the crankshaft is connected with the camshaft (6) and used for driving the camshaft (6) to rotate.
2. A crankshaft vertical valve train according to claim 1 wherein: each lower rocker arm (4) is L-shaped, the vertex of each lower rocker arm is rotatably connected to the rotating shaft (5), and the intersection of two edges of each lower rocker arm (4) is in arc transition.
3. A crankshaft vertical valve train according to claim 1 or 2 wherein: one end, facing the camshaft (6), of each lower rocker arm (4) is fixedly provided with a reinforcing part (401), and one side, facing away from the camshaft (6), of each reinforcing part (401) is provided with a bending part (402).
4. A crankshaft vertical valve train according to claim 3 wherein: the camshaft (6) is at least provided with an air inlet convex hull (601) and an air outlet convex hull (602), one side of each reinforcing part (401) facing the camshaft (6) is a convex arc transition surface, and each arc transition surface is respectively opposite to each air inlet convex hull (601) and each air outlet convex hull (602).
5. A crankshaft vertical valve train according to claim 3 wherein: hemispherical brackets (403) are fixedly arranged at one end of each lower rocker arm (4) departing from the camshaft (6), and one ends of each air inlet push rod (7) and each exhaust push rod (8) are spherical and are respectively embedded into the brackets (403).
6. A crankshaft vertical valve train according to claim 2 wherein: sleeves (404) are fixedly arranged at the top points of the lower rocker arms (4), the sleeves (404) are sleeved on the rotating shaft (5), and the opposite ends of every two adjacent sleeves (404) are in contact.
7. A crankshaft vertical valve train according to claim 1 wherein: the crankshaft and the camshaft are respectively sleeved with a third gear and a fourth gear (12), the third gear is meshed with the first gear (10), and the fourth gear (12) is meshed with the second gear (11).
8. A valve train according to claim 7, wherein the intermediate shaft (9) is a balance shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022986458.2U CN214007254U (en) | 2020-12-14 | 2020-12-14 | Crankshaft vertical type valve actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022986458.2U CN214007254U (en) | 2020-12-14 | 2020-12-14 | Crankshaft vertical type valve actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214007254U true CN214007254U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022986458.2U Active CN214007254U (en) | 2020-12-14 | 2020-12-14 | Crankshaft vertical type valve actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214007254U (en) |
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- 2020-12-14 CN CN202022986458.2U patent/CN214007254U/en active Active
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