CN212297415U

CN212297415U - Combined type crankshaft vibration damper

Info

Publication number: CN212297415U
Application number: CN202022937662.5U
Authority: CN
Inventors: 胡光成
Original assignee: Ningbo Deliding Technology Co ltd
Current assignee: Ningbo Deliding Technology Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-01-05
Anticipated expiration: 2030-12-10

Abstract

The utility model provides a combined type crankshaft vibration damper, including wheel hub, band pulley and inertia ring, the border axial of wheel hub is bent and is formed first connecting portion, the border of first connecting portion is radially outwards bent and is formed the second connecting portion, pass through the rubber layer between the terminal surface of band pulley and the second connecting portion and be connected, the inner wall of band pulley is laminated with the outer wall of first connecting portion; the annular mounting groove has been seted up to the lateral wall of band pulley, and inertia ring installs in annular mounting groove with rotating, and the lateral wall circumference equipartition of inertia ring has the knock pin, is equipped with the messenger in the pinhole the knock pin has the elastomeric element of outside trend of motion, and the head of knock pin is the hemisphere and extends to outside the pinhole, the inner wall circumference equipartition of annular mounting groove have with the same arc guide slot of knock pin quantity, the head of knock pin with the contact of arc guide slot. The utility model discloses combined type bent axle shock absorber, compact structure, the damping is effectual and long service life.

Description

Combined type crankshaft vibration damper

Technical Field

The utility model relates to a shock absorber, in particular to combined type bent axle shock absorber.

Background

In order to reduce the torsional vibration of the crankshaft, some engines are provided with a damper device, called a crankshaft damper, at the front end of the crankshaft, so that the torsional vibration energy of the crankshaft is gradually dissipated into friction in the damper, and the amplitude of the vibration is gradually reduced. The crankshaft is a torsional elastic system which has a certain natural vibration frequency. During operation of the engine, the magnitude and direction of the force transmitted to the crankpin via the connecting rod is periodically varied, and the periodically varying force acts on the crankshaft to cause the instantaneous angular velocity of the crank throw to also vary periodically. Due to the large moment of inertia of the flywheel, which is fixed to the crankshaft, its instantaneous angular velocity is substantially considered uniform. Thus, the crank throw will rotate faster than the flywheel and slower than the flywheel, and form torsional oscillation relative to the flywheel, i.e. torsional vibration of the crankshaft, which is aggravated by resonance when the frequency of the exciting force is integral multiple of the natural frequency of the crankshaft. This results in a loss of engine power, increased timing gear or chain wear, and in severe cases even a twisting off of the crankshaft. The strength and reliability of the crankshaft, which is one of the major moving parts in an internal combustion engine, largely determines the reliability of the internal combustion engine. Thus, torsional vibration is an important factor that must be considered in the design of an internal combustion engine. In order to reduce torsional vibration of a crankshaft, a damper is often mounted at the front end of the crankshaft, where the torsional amplitude is the largest, in an automobile engine. The traditional shock absorber is a single-stage torsional shock absorber, and has the main advantages of simple structure, small mass and reliable work, so the shock absorber is widely applied to automobile engines. The main disadvantage is that the damping effect on the torsional vibration of the crankshaft is not strong enough, and the rubber is easily aged due to the temperature rise caused by the heat generated by internal friction.

SUMMERY OF THE UTILITY MODEL

【1】 Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a compact structure, effectual, the long service life's of shock attenuation combined type bent axle shock absorber.

【2】 Technical scheme for solving problems

The utility model provides a combined type crankshaft vibration damper, including wheel hub 1, band pulley 2 and inertia ring 3, the border axial of wheel hub 1 is bent and is formed first connecting portion 11, the border of first connecting portion 11 is bent outwards radially and is formed second connecting portion 12, band pulley 2 is the annular, the terminal surface of band pulley 2 with connect through rubber layer 4 between the second connecting portion 12, the inner wall of band pulley 2 with the outer wall laminating of first connecting portion 11; annular mounting groove has been seted up to the lateral wall of band pulley 2, install inertia ring 3 rotates in the annular mounting groove, the lateral wall circumference equipartition of inertia ring has pinhole 300, the axis of pinhole 300 perpendicular and intersect in the axis of inertia ring 3, sliding fit has knock pin 81 in the pinhole 300, be equipped with the messenger in the pinhole 300 knock pin 81 has the elastomeric element 82 of outside trend of motion, the head of knock pin 81 is the hemisphere and extends to outside the pinhole 300, the inner wall circumference equipartition of annular mounting groove have with the same arc guide slot 200 of knock pin 81 quantity, the head of knock pin 81 with arc guide slot 200 contacts.

Further, the rotation angle of the knock pin 81 in the arc-shaped guide groove 200 is greater than or equal to 8 degrees and less than or equal to 25 degrees.

Further, the depth of the arc-shaped guide groove 200 is greater than or equal to 5mm and less than or equal to 10 mm.

Further, a sealing cover 9 is arranged at the open end of the annular mounting groove.

Further, the bottom surface of the annular mounting groove is provided with an annular groove, and a plane bearing 61 which is in contact with the end surface of the inertia ring 3 is arranged in the annular groove; the open end of annular mounting groove is equipped with inertia ring contact and be used for the first jump ring 72 of axial positioning, first jump ring 72 with be equipped with gasket 63 between the inertia ring.

Further, a sliding bearing 62 is arranged between the inertia ring 3 and the inner wall of the annular installation groove.

【3】 Advantageous effects

The utility model discloses combined type bent axle shock absorber sets up the inertia ring, can bear most vibrations, and the inertia ring passes through the knock pin and the band pulley is connected, and when arbitrary one in band pulley or wheel hub accelerates in the twinkling of an eye or stops in the twinkling of an eye, the inertia ring has the spring force on certain buffering time and the knock pin and can have dissolved a part of component, and the shock attenuation buffering is effectual and long service life. The hub and the belt wheel are connected and driven by rubber, so that the defect of rigid connection between the hub and the belt wheel is overcome, and the aim of assisting shock absorption is fulfilled; the utility model discloses combined type bent axle shock absorber, compact structure, the damping is effectual and long service life.

Drawings

FIG. 1 is a schematic structural view of the combined crankshaft damper of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of an inertia ring of the combined crankshaft damper of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

in the figure: 1. the connecting structure comprises a hub, 11, a first connecting part, 12, a second connecting part, 2, a belt wheel, 200, an arc-shaped guide groove, 3, an inertia ring, 300, a pin hole, 4, a rubber layer, 5, a shaft sleeve, 61, a plane bearing, 62, a sliding bearing, 63, a gasket, 72, a first clamping spring, 81, a top pin, 82, an elastic part, 9 and a sealing cover.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the utility model provides a combined type crankshaft damper, including wheel hub 1, band pulley 2 and inertia ring 3, the border axial of wheel hub 1 is bent 90 degrees and is formed first connecting portion 11, the border of first connecting portion 11 is radially outwards bent 90 degrees and is formed second connecting portion 12, form the installation area that is used for installing the band pulley between first connecting portion 11 and the second connecting portion 12; band pulley 2 is the annular, and its cover is established in the installing zone, is equipped with rubber layer 4 between band pulley 2's terminal surface and the second connecting portion, and the both sides on rubber layer bond on wheel hub 1 and band pulley 2 through vulcanizing respectively, are equipped with the belt groove on band pulley 2's outer wall, and the inner wall and the 11 outer wall laminating of first connecting portion of band pulley 2, in this embodiment, are equipped with axle sleeve 5 between band pulley 2 inner wall and the 11 outer walls of second connecting portion, are equipped with the jump ring on first connecting portion 11 for carry out axial positioning to axle sleeve 5.

An annular mounting groove is formed in the side wall of the belt pulley 2 and is formed in the side, facing away from the second connecting portion 12, of the belt pulley, the annular mounting groove is coaxial with the belt pulley, the inertia ring 3 is rotatably mounted in the annular mounting groove, specifically, an annular groove is formed in the bottom surface (end surface) of the annular mounting groove, the annular groove is coaxial with the annular mounting groove, a plane bearing 61 in contact with the end surface of the inertia ring 3 is arranged in the annular groove, meanwhile, a first clamp spring 72 in contact with the inertia ring and used for axial positioning is arranged at the open end of the annular mounting groove, and a gasket 63 is arranged between the first clamp spring 72 and the inertia ring and used for axial; the gasket is made of copper, a plurality of grooves are formed in the gasket, and graphite is filled in the grooves to achieve a lubricating effect; a sliding bearing 62 is arranged between the inner wall of the inertia ring 3 and the inner wall of the annular mounting groove and is used for realizing the rotation of the inertia ring and radial positioning, and a second snap spring which is contacted with the end part of the sliding bearing 62 and is used for realizing axial positioning is arranged on the inner wall of the annular mounting groove; a gap is arranged between the outer wall of the inertia ring 3 and the side wall of the annular mounting groove, the gap is 5-10mm, pin holes 300 are uniformly distributed on the side wall of the inertia ring in the circumferential direction, in the embodiment, six pin holes 300 are arranged, the axis of each pin hole 300 is vertical and intersected with the axis of the inertia ring 3, a jacking pin 81 is slidably arranged in each pin hole 300, an elastic part 82 is arranged in each pin hole 300, the elastic part 82 enables the jacking pin 81 to have an outward movement trend, in the embodiment, the elastic part is a spring, the head of each jacking pin 81 is hemispherical and extends out of each pin hole 300, the arc guide grooves 200 with the same number as that of the jacking pins 81 are uniformly distributed on the inner wall of the annular mounting groove in the circumferential direction, and the heads of the jacking pins 81 are contacted with the arc guide; the rotation angle of the ejector pin 81 in the arc-shaped guide groove 200 is more than or equal to 8 degrees and less than or equal to 25 degrees, namely, under the rotation angle, the ejector pin 81 does not depart from the arc-shaped guide groove 200, the depth of the arc-shaped guide groove 200 is more than or equal to 5mm and less than or equal to 10mm, in order to avoid the entry of impurities, a sealing cover 9 is arranged at the open end of the annular mounting groove, and the entry of dust, water and the like to influence internal components is avoided.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A combined type crankshaft vibration damper is characterized in that: the wheel comprises a hub (1), a belt wheel (2) and an inertia ring (3), wherein the edge of the hub (1) is axially bent to form a first connecting part (11), the edge of the first connecting part (11) is radially bent outwards to form a second connecting part (12), the belt wheel (2) is annular, the end surface of the belt wheel (2) is connected with the second connecting part (12) through a rubber layer (4), and the inner wall of the belt wheel (2) is attached to the outer wall of the first connecting part (11); annular mounting groove has been seted up to the lateral wall of band pulley (2), install inertia ring (3) rotatoryly in the annular mounting groove, the lateral wall circumference equipartition of inertia ring has pinhole (300), the axis of pinhole (300) is perpendicular and intersect in the axis of inertia ring (3), pinhole (300) internal slipping is furnished with knock pin (81), be equipped with in pinhole (300) and make knock pin (81) have outside moving trend's elastomeric element (82), the head of knock pin (81) is the hemisphere and extends to outside pinhole (300), the inner wall circumference equipartition of annular mounting groove have with the same arc guide slot (200) of knock pin (81) quantity, the head of knock pin (81) with arc guide slot (200) contact.

2. The compound crankshaft damper as in claim 1, wherein: the rotation angle of the ejector pin (81) in the arc-shaped guide groove (200) is more than or equal to 8 degrees and less than or equal to 25 degrees.

3. The compound crankshaft damper as in claim 2, wherein: the depth of the arc-shaped guide groove (200) is more than or equal to 5mm and less than or equal to 10 mm.

4. The compound crankshaft damper as in claim 1, wherein: and a sealing cover (9) is arranged at the open end of the annular mounting groove.

5. The compound crankshaft damper as in claim 1, wherein: an annular groove is formed in the bottom surface of the annular mounting groove, and a plane bearing (61) in contact with the end face of the inertia ring (3) is arranged in the annular groove; the open end of annular mounting groove is equipped with inertia ring contact and be used for axial positioning's first jump ring (72), first jump ring (72) with be equipped with gasket (63) between the inertia ring.

6. The compound crankshaft damper as in claim 1, wherein: and a sliding bearing (62) is arranged between the inertia ring (3) and the inner wall of the annular mounting groove.