CN109372930B - Self-adaptive damping piston and shock absorber - Google Patents

Self-adaptive damping piston and shock absorber Download PDF

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Publication number
CN109372930B
CN109372930B CN201811510021.2A CN201811510021A CN109372930B CN 109372930 B CN109372930 B CN 109372930B CN 201811510021 A CN201811510021 A CN 201811510021A CN 109372930 B CN109372930 B CN 109372930B
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China
Prior art keywords
piston
damping
spiral groove
adaptive damping
lower bottom
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CN201811510021.2A
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CN109372930A (en
Inventor
袁宝
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Shenzhen Wujiang Zhichuang Technology Co ltd
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Shenzhen Wujiang Zhichuang Technology Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3228—Constructional features of connections between pistons and piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/362—Combination of sealing and guide arrangements for piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2222/00—Special physical effects, e.g. nature of damping effects
    • F16F2222/12—Fluid damping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2238/00—Type of springs or dampers
    • F16F2238/04—Damper

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention discloses a self-adaptive damping piston which comprises a piston body, wherein the piston body is a cylinder body comprising a side surface, an upper bottom surface and a lower bottom surface, the upper bottom surface and the lower bottom surface are mutually parallel, the piston body comprises a plurality of piston through holes penetrating through the upper bottom surface and the lower bottom surface, a plurality of piston spiral grooves are formed in the side surface, and two ends of each piston spiral groove are respectively arranged on the upper bottom surface and the lower bottom surface. Therefore, the damping oil can pass through the piston through hole and the piston spiral groove, and the piston spiral groove has the helicity, so that when the damping stroke is compressed quickly, the pressure of the damping oil passing through the piston spiral groove is high, and under the condition that the cross section of the spiral groove is not changed, the pressure of the damping oil passing through the piston spiral groove is increased, and the damping value is high; when the damping compression is slow, the damping value is small because the pressure of the damping oil in the piston spiral groove is small and the resistance of the bent piston spiral groove is reduced. Therefore, the adaptive damping piston and the shock absorber comprising the same of the present invention can automatically adjust the damping value according to the compression force.

Description

Self-adaptive damping piston and shock absorber
Technical Field
The invention relates to the technical field of mechanical spare parts, in particular to a self-adaptive damping piston and a shock absorber.
Background
Adaptive damping pistons are commonly used in shock absorbing, energy absorbing devices, particularly shock absorbers. The self-adaptive damping piston in the prior art is only provided with a through hole, and the flow velocity of oil in the through hole is uniform, so that the damping value cannot be adjusted.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an adaptive damping piston and a shock absorber capable of automatically adjusting a damping value.
Specifically, the present invention proposes the following specific examples:
the utility model provides a self-adaptation damping piston, its includes the piston body, the piston body is the cylinder including side, last bottom surface and bottom surface down, go up the bottom surface and the bottom surface is parallel to each other down, the piston body includes a plurality of running through go up the bottom surface and the piston through-hole of bottom surface down, the side is equipped with a plurality of piston helicla flutes, each the both ends of piston helicla flute are located respectively go up the bottom surface and the bottom surface down.
Further, in the present invention, a plurality of the piston spiral grooves are uniformly distributed on the side surface.
Further, in the invention, an outer edge groove is arranged at the intersection of the upper bottom surface and the side surface, and the outer edge groove is communicated with the piston spiral groove.
Further, in the present invention, the piston through hole has an inverted circular truncated cone shape, and a diameter of a cross section of the piston through hole at an upper bottom surface is larger than a diameter of a cross section of the piston through hole at a lower bottom surface.
Further, in the invention, the section of the piston spiral groove on the side surface is an arc-shaped groove;
the included angle between the tangent line of the middle part of the arc-shaped groove and the upper bottom surface is an acute angle.
Further, in the invention, the piston body is provided with a mounting hole penetrating through the upper bottom surface and the lower bottom surface, and the mounting hole is used for connecting an external piston rod.
Further, in the present invention, the plurality of piston through holes are uniformly distributed on the outer periphery of the mounting hole.
A shock absorber comprising an adaptive damping piston according to any one of claims 1 to 7 mounted on the compression end of a piston rod within a piston cylinder.
Further, in the present invention, the adaptive damping piston is rotatably mounted to the compression end.
Further, in the present invention, the shock absorber further comprises a sealing means for confining said compression end within said piston cylinder;
the sealing device comprises a piston rod gasket, two sealing rings and a locking cup, the piston rod gasket is arranged between the two sealing rings, the piston rod gasket and the two sealing rings are arranged on the piston cylinder through the locking cup, and the compression end is limited in the piston cylinder;
the end part of the piston cylinder, which is far away from the piston rod, is provided with an upper piston cover, and the upper piston cover is also provided with an upper fixed point; the upper fixing point extends out of one side of the piston cylinder.
The self-adaptive damping piston comprises a piston body, wherein the piston body is a cylinder body comprising a side surface, an upper bottom surface and a lower bottom surface, the upper bottom surface and the lower bottom surface are parallel to each other, the piston body comprises a plurality of piston through holes penetrating through the upper bottom surface and the lower bottom surface, the side surface is provided with a plurality of piston spiral grooves, and two ends of each piston spiral groove are respectively arranged on the upper bottom surface and the lower bottom surface. In the invention, the damping oil can pass through the piston through hole and the piston spiral groove, and the piston spiral groove has a curvature, so when the damping compression is fast, the damping oil has a large damping value because the flow speed of the damping oil in the piston spiral groove is fast and the resistance of the damping oil to the curved piston spiral groove is increased; when the damping compression is slow, the damping oil is subjected to the resistance reduction of the bent piston spiral groove due to the slow flow rate of the damping oil in the piston spiral groove, and the damping value is small. Therefore, the adaptive damping piston and the shock absorber comprising the same of the present invention can automatically adjust the damping value according to the compression force.
In summary, the special structure of the present invention has many advantages and practical values, and similar methods are not published or used in the similar products, so that the present invention is innovative, has a practical and useful effect, and has a plurality of enhanced effects compared with the prior art, thereby being more practical and having a wide industrial value.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic perspective view of an embodiment of an adaptive damping piston according to the present invention;
FIG. 2 is a schematic perspective view of an embodiment of an adaptive damping piston according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of the shock absorber of the present invention.
The reference numbers illustrate:
100-a shock absorber;
1-lower fixation point; 2-fisheye bearings; 3-spring bottom support; 4-a spring; 5-sealing device; 51-locking cup; 52-sealing ring; 53-piston rod gasket; 6-a piston rod; 61-compression end; 7-piston cylinder upper cover protective housing;
20-an adaptive damping piston; 8-a piston body; 81-piston through hole; 82-piston helical groove; 83-mounting holes; 84-upper bottom surface; 85-lower bottom surface; 86-side; 87-outer edge grooves;
9-a piston cylinder; 10-a spring adjustment ring; 11-upper fixation point; 12-piston cylinder upper cover.
Detailed Description
Various embodiments of the present invention will be described more fully hereinafter. The invention is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit various embodiments of the invention to the specific embodiments disclosed herein, but on the contrary, the intention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of various embodiments of the invention.
Hereinafter, the terms "includes" or "may include" used in various embodiments of the present invention indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "a or/and B" includes any or all combinations of the words listed simultaneously, e.g., may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: in the present invention, unless otherwise explicitly stated or defined, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; there may be communication between the interiors of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, it should be understood by those skilled in the art that the terms indicating an orientation or a positional relationship herein are based on the orientations and the positional relationships shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation and operate, and thus, should not be construed as limiting the present invention.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
As shown in fig. 1-3.
The utility model provides a self-adaptation damping piston 20, its includes piston body 8, piston body 8 is the cylinder including side, last bottom surface 84 and bottom surface 85 down, go up bottom surface 84 and bottom surface 85 is parallel to each other down, piston body 8 includes a plurality of running through go up bottom surface 84 and bottom surface 85's piston through-hole 81 down, the side is equipped with a plurality of piston helical grooves 82, each piston helical groove 82's both ends are located respectively go up bottom surface 84 and bottom surface 85 down.
As described above, the adaptive damping piston 20 may include the piston body 8, and the piston body 8 may have a cylindrical shape, and in particular, may have a cylindrical shape or a regular polygonal shape. The piston body 8 includes an upper bottom surface 84 and a lower bottom surface 85 parallel to each other, and a side surface 86 perpendicular to the upper bottom surface 84 and the lower bottom surface 85.
The same piston through hole 81 passes through the upper bottom surface 84 and the lower bottom surface 85. The piston through hole 81 may be plural. The piston spiral groove 82 is provided on a side surface 86 of the piston body 8, and it should be further described that the piston spiral groove 82 has two end portions provided on the upper bottom surface 84 and the lower bottom surface 85, respectively.
Therefore, the damping oil can flow through the piston through hole 81 and the piston spiral groove 82 of the adaptive damping piston 20, and the section of the piston spiral groove 8 on the side surface 86 is the spiral piston spiral groove 82. Therefore, when the shock absorber 100 or the damper mounted with the adaptive damping piston 20 receives a large external force, the shock absorber compresses fast, and since the pressure of the damping oil passing through the piston spiral groove 82 is strong, the pressure of the damping oil passing through the piston spiral groove 82 is increased and the damping value is large under the condition that the cross section of the piston spiral groove 82 passing through the path is not changed; when the shock absorber 100 or the damper with the adaptive damping piston 20 is subjected to a small external force, the shock absorption compression is slow, and the shock absorption oil is subjected to a small resistance and a small damping value because the pressure of the shock absorption oil in the piston spiral groove 82 is small.
Therefore, the adaptive damping piston 20 of the present embodiment can automatically adjust the damping value according to the value of the external force.
Further, in the present embodiment, a plurality of the piston spiral grooves 82 are uniformly distributed on the side surface 86.
Since there are a plurality of piston helical grooves 82, the plurality of piston helical grooves 82 may be uniformly disposed on the lateral surface 86 of the adaptive damping piston 20 to provide uniform force on the adaptive damping piston 20.
Further, in the present embodiment, an outer edge groove 87 is provided at the intersection of the upper bottom surface 84 and the side surface 86, and the outer edge groove 87 communicates with the piston spiral groove 82.
As described above, the outer edge groove 87 may collect the damping oil near the outer edge of the upper bottom surface 84, and since the outer edge groove 87 communicates with the piston screw groove 82, the damping oil near the outer edge groove 87 may be drained to the piston screw groove 82.
Further, in the present embodiment, the piston through hole 81 has a reverse truncated cone shape, and the diameter of the cross section of the piston through hole 81 at the upper bottom surface 84 is larger than the diameter of the cross section of the piston through hole 81 at the lower bottom surface 85.
As described above, the piston through hole 81 having the reverse truncated cone shape can adjust the resistance of the damping oil when the piston through hole 81 flows, and particularly, when the compression force received by the shock absorber 100 is large, the flow rate of the damping oil increases, and the damping oil passing through the piston through hole 81 receives an increase in resistance from the side wall of the piston through hole 81, increasing the damping value. When the compression force received by the shock absorber 100 is small, the flow rate of the shock-absorbing oil is slow, and the shock-absorbing oil passing through the piston through-hole 81 receives little resistance from the side wall of the piston through-hole 81, thereby reducing the damping value. Thereby further achieving the purpose of automatically adjusting the damping value.
Further, in the present embodiment, the cross section of the piston spiral groove 82 on the side surface 86 is an arc-shaped groove; the tangent line at the middle of the arc-shaped groove forms an acute angle with the upper bottom surface 84.
The above means that the piston spiral groove 82 has an arc-shaped cross section at the side surface 86 in order to provide a greater resistance to the flow of the damping oil in the piston spiral groove 82, and thus the flow of the damping oil in the piston spiral groove 82 can receive the resistance of the arc due to the arc. It will be appreciated that as the damping force increases, the greater the resistance experienced by the damping oil, the greater the damping value of the adaptive damping piston 20. When the damping force decreases, the resistance to the damping oil decreases and the damping value of the adaptive damping piston 20 decreases.
The tangent line at the middle of the arc-shaped groove refers to the tangent line at the midpoint of the side surface 86, which extends toward the upper bottom surface 84, and the tangent line forms an acute angle with the upper bottom surface 84. That is, the connection line of the two ends of the upper bottom surface 84 and the lower bottom surface 85 of the arc-shaped piston spiral groove 82 is not perpendicular to the upper bottom surface 84 and the lower bottom surface 85. Therefore, the damping oil does not flow through or flows through only a small amount of the piston screw groove 82 due to the excessive resistance, so that the resistance of the piston screw groove 82 is within a normal range.
Further, in this embodiment, the piston body 8 is provided with a mounting hole 83 penetrating through the middle portions of the upper bottom surface 84 and the lower bottom surface 85, and the mounting hole 83 is used for connecting the external piston rod 6.
As described above, the adaptive damping piston 20 may be installed in the externally connected piston rod 6. In particular, the adaptive damping piston 20 is provided with a mounting hole 83 mounted in the piston rod 6, so that the adaptive damping piston 20 can be more firmly mounted in the piston rod 6.
Further, in the present embodiment, a plurality of the piston through holes 81 are uniformly distributed on the outer circumference of the mounting hole 83.
As described above, in order to make the flow rate more uniform when the damping oil passes through the piston through-holes 81, the plurality of piston through-holes 81 may be uniformly distributed on the outer circumference of the mounting hole 83. In the present embodiment, the number of the piston through holes 81 may be 6, 7, or 8. The number of piston helical grooves 82 may be 10, or 12, or 13.
Example 2
As shown in fig. 1-3.
Shock absorber 100 comprising an adaptive damping piston 20 according to any of the previous claims, said adaptive damping piston 20 being mounted to the compression end 61 of piston rod 14 within piston cylinder 9.
The above means that the shock absorber 100 of the present embodiment includes the adaptive damping piston 20 of embodiment 1. The adaptive damping piston 20 is installed in the piston rod 6, the piston rod 6 comprises a connecting end exposed out of the piston cylinder 9 and used for connecting the fisheye bearing 2, and the piston rod 6 further comprises a compression end 61 arranged in the piston cylinder 9 and connected with the adaptive damping piston 20 and used for compressing shock absorption oil.
In particular, the adaptive damping piston 20 may comprise a piston body 8, the piston body 8 being cylindrical, in particular, being cylindrical or a regular polygon. The piston body 8 includes an upper bottom surface 84 and a lower bottom surface 85 parallel to each other, and a side surface 86 perpendicular to the upper bottom surface 84 and the lower bottom surface 85.
The same piston through hole 81 passes through the upper bottom surface 84 and the lower bottom surface 85. The piston through hole 81 may be plural. The piston spiral groove 82 is provided on a side surface 86 of the piston body 8, and it should be further described that the piston spiral groove 82 has two end portions provided on the upper bottom surface 84 and the lower bottom surface 85, respectively.
Therefore, the damping oil can flow through the piston through hole 81 and the piston spiral groove 82 of the adaptive damping piston 20, and the cross section of the piston spiral groove 8 on the side surface 86 is the piston spiral groove 82 with curvature. Therefore, when the shock absorber 100 or the damper mounted with the adaptive damping piston 20 receives a large external force, the shock absorber 100 compresses fast, and the damping oil receives a large resistance and a large damping value due to the fast flow rate of the damping oil in the piston spiral groove 82; when the shock absorber 100 or the damper equipped with the adaptive damping piston 20 receives a small external force, the shock absorption compression is slow, and the shock absorption oil receives a small resistance and a small damping value because the flow rate of the shock absorption oil in the piston spiral groove 82 is slow.
Therefore, the adaptive damping piston 20 of the present embodiment can automatically adjust the damping value according to the value of the external force.
Further, in the present embodiment, the adaptive damping piston 20 is rotatably mounted to the compression end 61.
The above description refers to the adaptive damping piston 20 being rotatable relative to the piston rod 6 when the adaptive damping piston 20 is attached to the compression end 61 of the piston rod 6.
Further, the shock absorber 100 of the present embodiment further includes a sealing device 5 for limiting the compression end 61 in the piston cylinder 9;
the sealing device 5 comprises a piston rod gasket 53, two sealing rings 52 and a locking cup 51, wherein the piston rod gasket 53 is arranged between the two sealing rings 52, the piston rod gasket 53 and the two sealing rings 52 are arranged on the piston cylinder 9 through the locking cup 51, and the compression end 61 is limited in the piston cylinder 9;
the end of the piston cylinder 9, which is far away from the piston rod 14, is provided with an upper piston cover 12, and the upper piston cover 12 is further provided with an upper fixing point 11; the upper fixing point 11 extends on one side of the piston cylinder 9.
In order to prevent the damping oil in the piston cylinder 9 from leaking, a sealing device is provided at the end of the piston cylinder 9 where the piston rod 6 is attached. The sealing device comprises a piston rod gasket 53 and two sealing rings 53, wherein the piston rod gasket 53 is arranged between the two sealing rings 52. In particular, the sealing means 5 may be mounted in the end of the piston cylinder 9 or in an inner cavity close to the end.
The other end of the piston cylinder 9 is provided with a piston cylinder upper cover 12, and the end part is provided with a spring adjusting ring 10.
In addition, a lower fixing point 1 is arranged on the fisheye bearing 2 connected with the connecting end of the piston rod 14, and a spring bottom support 3 is arranged at the connecting end of the piston rod 14.
A spring 4 is arranged between the spring adjusting ring 10 and the spring support 3.
Further, an upper fixing point 11 is also arranged on the piston cylinder upper cover 12. The upper fixing point 11 extending outside the piston cylinder 9 means that the upper fixing point 11 is not in the axial direction of the piston cylinder 9, and specifically, the upper fixing point 11 may extend to the side of the piston cylinder 9, that is, be disposed on the side of the piston cylinder 9, as shown in fig. 3. The upper fixing point 11 is arranged on one side of the piston cylinder 9, so that the compression stroke loss caused by damping angle displacement is reduced, and the torque route is more effective. And effectively reduce the shock attenuation overall length, improve structure space utilization and reduce potential mechanism motion interference.
A piston cylinder upper cover protective shell 7 for protecting the piston cylinder upper cover 12 is also arranged on the top of the piston cylinder upper cover 12.
Although terms indicating structures are used more often above, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (8)

1. A self-adaptive damping piston is characterized by comprising a piston body, wherein the piston body is a cylinder body comprising a side surface, an upper bottom surface and a lower bottom surface, the upper bottom surface and the lower bottom surface are parallel to each other, the piston body comprises a plurality of piston through holes penetrating through the upper bottom surface and the lower bottom surface, the side surface is provided with a plurality of piston spiral grooves, and two ends of each piston spiral groove are respectively arranged on the upper bottom surface and the lower bottom surface;
an outer edge groove is formed at the intersection of the upper bottom surface and the side surface and communicated with the piston spiral groove;
the section of the piston spiral groove on the side surface is an arc-shaped groove; the included angle between the tangent line of the middle part of the arc-shaped groove and the upper bottom surface is an acute angle.
2. The adaptive damping piston of claim 1 wherein a plurality of said piston helical grooves are uniformly distributed in said side surface.
3. The adaptive damping piston of claim 1, wherein the piston through bore is of a rounded frustum shape, and a diameter of a cross section of the piston through bore at an upper bottom surface is greater than a diameter of a cross section of the piston through bore at a lower bottom surface.
4. The adaptive damping piston of claim 1, wherein the piston body defines mounting holes extending through the upper and lower bottom surfaces for connection to an external piston rod.
5. The adaptive damping piston of claim 4, wherein the plurality of piston through holes are evenly distributed around the periphery of the mounting hole.
6. Shock absorber, characterized in that it comprises an adaptive damping piston according to any of claims 1-5, which is mounted on the compression end of the piston rod in the piston cylinder.
7. The shock absorber according to claim 6, wherein said adaptive damping piston is rotatably mounted to said compression end.
8. The shock absorber according to claim 6, further comprising a sealing means confining said compression end within said piston cylinder;
the sealing device comprises a piston rod gasket, two sealing rings and a locking cup, the piston rod gasket is arranged between the two sealing rings, the piston rod gasket and the two sealing rings are arranged on the piston cylinder through the locking cup, and the compression end is limited in the piston cylinder;
the end part of the piston cylinder, which is far away from the piston rod, is provided with an upper piston cover, and the upper piston cover is also provided with an upper fixed point; the upper fixing point extends out of one side of the piston cylinder.
CN201811510021.2A 2018-12-11 2018-12-11 Self-adaptive damping piston and shock absorber Active CN109372930B (en)

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Application Number Priority Date Filing Date Title
CN201811510021.2A CN109372930B (en) 2018-12-11 2018-12-11 Self-adaptive damping piston and shock absorber

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Application Number Priority Date Filing Date Title
CN201811510021.2A CN109372930B (en) 2018-12-11 2018-12-11 Self-adaptive damping piston and shock absorber

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CN109372930A CN109372930A (en) 2019-02-22
CN109372930B true CN109372930B (en) 2020-07-14

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CN113153953B (en) * 2021-04-22 2022-09-02 安徽工程大学 Novel shock absorber
CN113883211B (en) * 2021-09-08 2023-04-07 桂林电子科技大学 Hydraulic damping device for truck suspension
CN115217887B (en) * 2022-05-18 2024-06-04 长沙市伊尔特流体技术有限公司 Hydraulic damper

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