CN201943765U

CN201943765U - Low-vibration energy-conservation distribution cam shaft for motor vehicle engine

Info

Publication number: CN201943765U
Application number: CN201120028497XU
Authority: CN
Inventors: 李云合
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-27
Filing date: 2011-01-27
Publication date: 2011-08-24
Anticipated expiration: 2021-01-27

Abstract

The utility model relates to a distribution cam shaft for an explosive motor of a motor vehicle, in particular to a low-vibration energy-conservation distribution cam shaft for a motor vehicle engine, which is applicable to an engine of a motor vehicle, and overcomes the defects that the vibration and the noise of an air valve are high as the air valve is not stable when being opened and closed due to the variable acceleration rotation of a crank shaft. The low-vibration energy-conservation distribution cam shaft comprises a shaft body, a distribution cam, a power driving wheel and an eccentric disc body, wherein the distribution cam and the power driving wheel are fixed on the shaft body and coaxially rotate with the shaft body; the eccentric disc body is arranged on the shaft body and the surface of the eccentric disc body is vertical to the shaft body; and in the circumference direction of the shaft body, a connection line between the mass center of the eccentric disc body and the shaft body deviates from a connection line between the mass center of the distribution cam and the shaft body. In the low-vibration energy-conservation distribution cam shaft, the elasticity of a valve spring can be adjusted to be more moderate, thereby being beneficial to reducing the oil consumption of the engine, and achieving the effects of saving oil, balancing the impact force on the crank shaft, reducing the vibration of the engine and enhancing output torque and power.

Description

The energy-conservation distribution cam axle of the low vibrations of the motor of Motor Vehicle

Technical field

The utility model relates to a kind of distribution cam axle of explosive motor of Motor Vehicle.

Background technique

As shown in Figure 5 and Figure 6, traditional automotive internal combustion engines relies on the cam 10 on the distribution cam axle, and the far-end that periodically drives valve rocker is opened the valve of cylinder, takes a breath.Meanwhile, the reaction force of valve spring also acts on the valve rocker, and the near-end of valve rocker is tightly abutted on the cam 10 of distribution cam axle.The rotating power of distribution cam axle comes from the bent axle 11 of cylinder of internal combustion engine, and is well-known, and the rotation of bent axle 11 is fluctuating accelerations periodically, the explosion type stroke when this stems from engine cylinder and does work with 12 in piston and the cyclically-varying of suction stroke.The fluctuating acceleration rotation of bent axle 11 has caused the not steady gentle door spring elasticity in the valve switching process to be difficult to regulate appropriateness, and engine consumption is big, noise big, vibrations are big and loss power thereby make.

The model utility content

The purpose of this utility model provides a kind of energy-conservation distribution cam axle of the low vibrations of motor of Motor Vehicle, with the fluctuating acceleration rotation that solves bent axle cause in the valve switching process not steadily and then cause the defective that the valve switch vibrations are big, noise is big.It comprises axis body 1, valve cam 2 and powered drive wheel 4, described valve cam 2 and powered drive wheel 4 are fixed on the axis body 1 and the above two and axis body 1 coaxial rotation, it also comprises eccentric disk body 3, described eccentric disk body 3 be arranged on the axis body 1 and the disc surfaces of eccentric disk body 3 perpendicular to axis body 1, depart from the H of center of mass of valve cam 2 and the line of axis body 1 at the D of center of mass of the above eccentric disk body 3 of circumferencial direction of axis body 1 and the line of axis body 1.

Because eccentric disk body 3 is fixed on the axis body 1, increased the rotary inertia of axis body 1, so the bent axle of steadily fluctuating acceleration rotation is to the impact of axis body 1 with valve cam 2 systems with valve cam 2 systems.Because this impact has alleviated, make valve cam 2 when driving valve rocker, can not produce impact on the one hand, the switching process of valve is steady, vibrations have been reduced, the valve spring elasticity can be regulated more appropriately on the other hand, the time of valve switch is more accurate, helps reducing the oil consumption of motor, reaches oil-saving effect.Because the center of mass of valve cam 2 does not upwards overlap in week with the center of mass of valve cam 2, help unbalance counteracting and the reparation of dynamic balancing, static balancing that cause by the mass eccentricity of valve cam 2 originally, thereby reached the effect that improves engine output torque and power.The utility model can also be offset the vibrations of crank to a certain extent in addition.

Description of drawings

Fig. 1 is a structural representation of the present utility model, Fig. 2 is the side view of Fig. 1, Fig. 3 is mode of execution seven and eight a structural representation, Fig. 4 is mode of execution nine and ten a structural representation, Fig. 5 is a structural representation of prior art, and bent axle 11 is given cam 10 transmission of power by a pair of gear drive; Fig. 6 is another structural representation of prior art, and this structure is the structural representation of overhead valve cam shaft type chainlet motorcycle engine distribution drive part, and wherein minor sprocket 17 passes to hinge wheel 16 to the rotating power on the bent axle 11 by chain 15.

Embodiment

Embodiment one: specify present embodiment below in conjunction with Fig. 1 and Fig. 2.Present embodiment comprises axis body 1, valve cam 2 and powered drive wheel 4, described valve cam 2 and powered drive wheel 4 are fixed on the axis body 1 and the above two and axis body 1 coaxial rotation, it also comprises eccentric disk body 3, described eccentric disk body 3 be arranged on the axis body 1 and the disc surfaces of eccentric disk body 3 perpendicular to axis body 1, depart from the H of center of mass of valve cam 2 and the line of axis body 1 at the D of center of mass of the above eccentric disk body 3 of circumferencial direction of axis body 1 and the line of axis body 1.Powered drive wheel 4 imports the power on the I. C. engine crankshaft into.

Embodiment two: specify present embodiment below in conjunction with Fig. 1 and Fig. 2.The difference of present embodiment and mode of execution one is that described eccentric disk body 3 is fixed on the end face of powered drive wheel 4.The eccentric disk body 3 of present embodiment is arranged on axis body 1 in this way, has both reached compact structure, makes eccentric disk body 3 obtain secure fixation again.

Embodiment three: specify present embodiment below in conjunction with Fig. 1.The difference of present embodiment and mode of execution two is that it comprises that also 3, two eccentric disk bodies 3 of another eccentric disk body are separately fixed on the two ends end face of powered drive wheel 4.

Embodiment four: specify present embodiment below in conjunction with Fig. 2.The difference of present embodiment and mode of execution two is: eccentric disk body 3 is for semicircle, and semicircular profile is along the circular contour distribution of powered drive wheel 4 end faces.Such benefit is that eccentrically mounted weight piece 3 barycenter are evenly distributed, and realizes static balancing easily.

Embodiment five: specify present embodiment below in conjunction with Fig. 2.The difference of present embodiment and mode of execution three is: the surface area of eccentric disk body 3 be powered drive wheel 4 end face surface long-pending 1/2nd.

Embodiment six: present embodiment and mode of execution two, three, four or fives' difference is: eccentric disk body 3 riveted joints or welding, bolt are connected on the end face of powered drive wheel 4.Such benefit is simple in structure and has realized secure fixation.

Embodiment seven: specify present embodiment below in conjunction with Fig. 3.The difference of present embodiment and mode of execution two to five is: at the D of center of mass of the above eccentric disk body 3 of circumferencial direction of axis body 1 and the line OD of axis body 1, and the angle β between the line OH of the H of center of mass of valve cam 2 and axis body 1 at 60 degree between 120 degree.This kind mode is suitable for the motorcycle of underlying valve cam shaft type internal-combustion engine shown in Figure 5.

Embodiment eight: specify present embodiment below in conjunction with Fig. 3.The difference of present embodiment and mode of execution seven is: at the D of center of mass of the above eccentric disk body 3 of circumferencial direction of axis body 1 and the line OD of axis body 1, and the angle β between the line OH of the H of center of mass of valve cam 2 and axis body 1 is 90 degree.This angle is a preferred forms.

Embodiment nine: specify present embodiment below in conjunction with Fig. 4.The difference of present embodiment and mode of execution two to five is: described valve cam is two, be respectively a valve cam 2-1 and No. two valve cam 2-2, the line OE of valve cam 2-1 center of mass and axis body 1, and the angle α between the line OF of No. two valve cam 2-2 center of mass and axis body 1 is 90 degree, and the D of center of mass of eccentric disk body 3 is between the reverse extending line OY of the reverse extending line OX of line OE and line OF.This kind mode is suitable for overhead valve cam shaft type motorcycle engine.This motorcycle engine also is the chainlet motor, and gas distribution system is that two valve cams drive two valve rockers respectively, and powered drive wheel 4 is sprocket wheels, transmits the power of bent axle to axis body 1.

Embodiment ten: specify present embodiment below in conjunction with Fig. 4.The difference of present embodiment and mode of execution nine is: the D of center of mass of eccentric disk body 3 is in the neutral position of the reverse extending line OY of the reverse extending line OX of line OE and line OF.This position is a preferred forms.This position makes whole cam shaft system static balancing the best.

Claims

1. the motor of Motor Vehicle hangs down the energy-conservation distribution cam axle of vibrations, it comprises axis body (1), valve cam (2) and powered drive wheel (4), described valve cam (2) and powered drive wheel (4) are fixed on axis body (1) and go up and the above two and the coaxial rotation of axis body (1), it is characterized in that it also comprises eccentric disk body (3), described eccentric disk body (3) be arranged on that axis body (1) is gone up and the disc surfaces of eccentric disk body (3) perpendicular to axis body (1), depart from the center of mass (H) of valve cam (2) and the line of axis body (1) at the line of the center of mass (D) of the above eccentric disk body (3) of circumferencial direction of axis body (1) and axis body (1).

2. the energy-conservation distribution cam axle of the low vibrations of the motor of Motor Vehicle according to claim 1 is characterized in that described eccentric disk body (3) is fixed on the end face of powered drive wheel (4).

3. the energy-conservation distribution cam axle of the low vibrations of the motor of Motor Vehicle according to claim 2 is characterized in that it also comprises another eccentric disk body (3), and two eccentric disk bodies (3) are separately fixed on the two ends end face of powered drive wheel (4).

4. the energy-conservation distribution cam axle of the low vibrations of the motor of Motor Vehicle according to claim 2 is characterized in that eccentric disk body (3) for semicircle, and semicircular profile is along the circular contour distribution of powered drive wheel (4) end face.

5. the energy-conservation distribution cam axle of the low vibrations of the motor of Motor Vehicle according to claim 4, the surface area that it is characterized in that eccentric disk body (3) be powered drive wheel (4) end face surface long-pending 1/2nd.

6. according to the energy-conservation distribution cam axle of the low vibrations of motor of claim 2,3,4 or 5 described Motor Vehicle, it is characterized in that (3) riveted joint of eccentric disk body or welding, bolt are connected on the end face of powered drive wheel (4).

7. the motor according to claim 2,3,4 or 5 described Motor Vehicle hangs down the energy-conservation distribution cam axle of vibrations, it is characterized in that at the center of mass (D) of the above eccentric disk body (3) of circumferencial direction of axis body (1) and the line (OD) of axis body (1), and the angle (β) between the line (OH) of the center of mass (H) of valve cam (2) and axis body (1) is between 60 degree are spent to 120.

8. the motor of Motor Vehicle according to claim 7 hangs down the energy-conservation distribution cam axle of vibrations, it is characterized in that at the center of mass (D) of the above eccentric disk body (3) of circumferencial direction of axis body (1) and the line (OD) of axis body (1), and the angle (β) between the line (OH) of the center of mass (H) of valve cam (2) and axis body (1) is 90 to spend.

9. according to claim 2,3, the energy-conservation distribution cam axle of the low vibrations of the motor of 4 or 5 described Motor Vehicle, it is characterized in that described valve cam is two, be respectively a valve cam (2-1) and No. two valve cams (2-2), the line (OE) of valve cam (2-1) center of mass and axis body (1), and the angle (α) between the line (OF) of No. two valve cam (2-2) center of mass and axis body (1) is 90 degree, and the center of mass (D) of eccentric disk body (3) is between the reverse extending line (OY) of the reverse extending line (OX) of line (OE) and line (OF).

10. the energy-conservation distribution cam axle of the low vibrations of the motor of Motor Vehicle according to claim 9, the center of mass (D) that it is characterized in that eccentric disk body (3) is in the neutral position of the reverse extending line (OY) of the reverse extending line (OX) of line (OE) and line (OF).