KR101726712B1 - Shock absorber piston rod for car - Google Patents

Shock absorber piston rod for car Download PDF

Info

Publication number
KR101726712B1
KR101726712B1 KR1020150097392A KR20150097392A KR101726712B1 KR 101726712 B1 KR101726712 B1 KR 101726712B1 KR 1020150097392 A KR1020150097392 A KR 1020150097392A KR 20150097392 A KR20150097392 A KR 20150097392A KR 101726712 B1 KR101726712 B1 KR 101726712B1
Authority
KR
South Korea
Prior art keywords
hollow shaft
tapered
head
nut
bolt
Prior art date
Application number
KR1020150097392A
Other languages
Korean (ko)
Other versions
KR20170006571A (en
Inventor
김인호
Original Assignee
(주)보림
(주) 보림테크
주식회사 보림파워텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)보림, (주) 보림테크, 주식회사 보림파워텍 filed Critical (주)보림
Priority to KR1020150097392A priority Critical patent/KR101726712B1/en
Publication of KR20170006571A publication Critical patent/KR20170006571A/en
Application granted granted Critical
Publication of KR101726712B1 publication Critical patent/KR101726712B1/en

Links

Images

Classifications

    • 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
    • F16F9/3221—Constructional features of 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
    • F16F9/3228—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
    • F16F2226/00—Manufacturing; Treatments
    • F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
    • F16F2226/045—Press-fitting

Abstract

According to an aspect of the present invention, there is provided a method of manufacturing a piston rod for an automobile shock absorber, comprising the steps of: preparing a hollow shaft (10) having a tapered nut portion (11) Preparing a head (20) having a tapered bolt (21) formed on an outer circumferential surface thereof so as to be assembled to a tapered nut portion (11) of the hollow shaft (10); And screwing the head (20) to the hollow shaft (10).

Description

[0001] The present invention relates to a piston rod for a shock absorber,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a shock absorber for absorbing vibrations and impact energy installed on an axle and a vehicle body of a motor vehicle, and more particularly, to a piston rod for an automobile shock absorber.

Generally, the suspension system of an automobile connects the axle and the vehicle body to prevent damage to the vehicle body and the cargo by controlling the vibration or shock received from the road surface to be transmitted directly to the vehicle body, thereby increasing the ride quality. A chassis spring for relieving the impact from the road surface, and a shock absorber for enhancing ride comfort by controlling free vibration of the chassis spring.

The shock absorber is connected to the axle and the body of the vehicle. The shock absorber absorbs the vibration and impact energy that the axle receives from the road surface when the vehicle is running. The shock absorber is a vibration and damping device that increases ride comfort. And a filler such as gas and oil is filled to the outside of the piston valve so as to increase the damping force.

Recently, improvement of fuel efficiency and efficiency have been emphasized in automobile technology development. To achieve this, weight reduction of automobile and automobile parts is required, and in recent years, weight reduction of piston rod constituting a shock absorber is required. The plans are being reviewed.

1 and 2, a conventional automobile shock absorber generally comprises a cylinder 100 in which a filler such as gas and oil is accommodated, a cylinder 100 mounted thereon, a piston valve coupled to the cylinder 100, A piston rod 200 to be operated and a holder 300 attached to the lower end of the cylinder 100 and coupled to the axle or the vehicle body of the automobile.

Korean Patent Laid-Open No. 10-2002-0015446 (a piston rod of a shock absorber) has been proposed as a representative prior art for reducing the weight of a piston rod of a conventional shock absorber for an automobile.

The prior art described above can be used to prevent leakage of oil by completely sealing the hollow portion of the inside by making the both ends of the hollow portion solid or solidified by welding using an iron core having excellent swingability, It is effective to prevent cracking or breakage in the wedging process. However, when the solidified members are welded to both ends of the body, the centers do not coincide with each other, and subsequent machining operations are required. There is a problem of deterioration.

That is, when the solidified member is welded to the both ends of the body formed by penetrating the hollow portion in the axial direction, it is difficult to match the center of the body through which the hollow portion penetrates and the center of the solidified member to each other, Since it is necessary to precisely process the welding portion, not only the workability and the productivity are significantly lowered but also the manufacturing cost is increased and the efficiency is deteriorated.

Korean Patent No. 10-0391419. Korean Patent No. 10-0455211. Korean Patent No. 10-0798141. Korean Patent No. 10-0792189.

The present invention provides a piston rod for an automobile shock absorber which is difficult to match the center of the piston rod conventionally, requires a subsequent machining process, and significantly reduces workability and productivity while increasing manufacturing costs.

Another object of the present invention is to provide a piston rod for an automobile shock absorber that maximizes the weight of the piston rod to improve the fuel efficiency of the automobile and improve workability and productivity.

According to an embodiment of the present invention, a hollow shaft 10 having a predetermined length and having a tapered nut 11 formed on the inner circumferential surfaces at both ends thereof;
And a head (20) having a tapered bolt (21) formed on its outer periphery so as to be screwed to the tapered nut part (11) of the hollow shaft (10)
The head 20 is screwed to the hollow shaft 10 and then the outer circumferential portion of the hollow shaft 10 at which the taper nut portion 11 and the tapered bolt portion 21 are located is subjected to plastic deformation Respectively,
The hollow shaft 10 is hollowed with a predetermined diameter therein, while the tapered nut portion 11 is formed on the inner peripheral surface of the hollow at both ends. The tapered nut portion 11 is formed in an inner side The inner diameter is tapered so as to be smaller,
The tapered bolt portion 21 of the head 20 is machined to have a diameter corresponding to the tapered nut portion 11 and is formed on one side of the shaft portion with a diameter smaller than the diameter of the tapered bolt portion 21 22 is extended and a chucking portion 23 is formed on the outer side of the shaft portion 22,
The inclination of the tapered nut portion 11 and the tapered bolt portion 21 is in the range of 1 to 2.5 degrees with respect to the center line,
The inner diameter of the nut portion 11 of the hollow shaft 10 and the outer diameter of the bolt portion 21 of the head 10 are machined to the same size and then the nut portion 11 of the hollow shaft 10 is heated to a high temperature In a state in which the inner diameter of the nut portion 11 is expanded and a portion where the bolt portion 21 of the head 10 is cooled to a low temperature to shrink the outer diameter of the bolt portion 21 of the head 10, The bolt portion 21 of the nut 20 is fastened to the nut portion 11,
And the joint between the hollow shaft 10 and the head 20 is welded with a laser.

delete

delete

delete

delete

According to the embodiment of the present invention, it is possible to increase the fuel consumption efficiency of the automobile by reducing the weight of the piston rod as much as possible without affecting the function and durability of the piston rod.

According to the embodiment of the present invention, the hollow shaft and the head are combined with the taper nut portion and the bolt portion, respectively, so that the coupling force between the hollow shaft and the head is excellent and a subsequent machining step is unnecessary, thereby improving workability and productivity .

Further, the hollow shaft and the head are screw-engaged, and then the outer peripheral portion of the hollow shaft at which the nut portion and the bolt portion are located is pressed and deformed by the press so that the coupling force is further increased by plastic deformation of the nut portion and the bolt portion, have.

1 is a perspective view showing a shock absorber for a vehicle according to a conventional example.
2 is a perspective view illustrating a piston rod for a shock absorber according to a conventional example.
3 is a sectional view of a piston rod for a vehicle shock absorber according to an embodiment of the present invention.
4 is a cross-sectional view of a hollow shaft according to an embodiment of the present invention.
5 is a front view showing a head according to an embodiment of the present invention.
6 is a cross-sectional view showing grooves formed at the outer circumferential periphery of the hollow shaft according to the embodiment of the present invention.
7 is a front view showing a welded portion of a piston rod for a vehicle shock absorber according to an embodiment of the present invention.
8 is a cross-sectional view of a main part showing an assembling process according to an embodiment of the present invention.
9 is a cross-sectional view of a main portion showing a mounting state of a hollow shaft and a head according to an embodiment of the present invention.
10 is a cross-sectional view showing a main portion showing a welding step in a method of manufacturing a piston rod for an automobile shock absorber according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

A piston rod for a vehicle shock absorber according to an embodiment of the present invention will now be described in detail with reference to the drawings.

3, the piston rod for an automobile shock absorber according to the embodiment of the present invention includes a hollow shaft 10 and a head 20. As shown in Fig.

The hollow shaft 10 has a predetermined length and has a hollow of a predetermined diameter therein, and a tapered nut portion 11 is formed on the inner peripheral surface of the hollow at both sides.

Here, the predetermined length of the hollow shaft 10 can be variously changed according to the kind of the vehicle and the piston rod installed in the shock absorber, so that the standardized length is determined by the judgment of a person skilled in the art. Therefore, a detailed explanation is omitted.

The hollow shaft 10 is preferably made of a steel pipe, that is, a cylindrical pipe or a cylindrical bar made of stainless steel having excellent durability and corrosion resistance.

4, the tapered nut portions 11 formed on the inner circumferential surfaces on both side ends of the hollow shaft 10 are tapered so that the inner diameter gradually decreases inward from the end of the end of the hollow shaft 10, The inclination of the nut portion 11 is preferably in the range of 1 to 2.5 degrees with respect to the center line, and it is also possible to work with a plurality of double-row threads.

Here, if the inclination of the taper nut portion 11 is less than 1 [deg.], The inclination of the taper nut portion 11 is insignificant so that the coupling force between the hollow shaft 10 and the head 20 can be weakened by an external impact, The length of the nut portion 11 and the bolt portion 21 may be excessively shortened so that the coupling force between the hollow shaft 10 and the head 20 may be weakened. As shown in FIG.

On the other hand, in the hollow shaft 10, as shown in Fig. 6, the grooves H1 and H2 are opposed to the outer circumferential portion of the position where the taper nut portion 11 and the bolt portion 21 of the head 20 are engaged Respectively. The grooves H1 and H2 are grooves formed by pressurization of the press during the plastic deformation process. When the entire outer circumferential edge portion is pressed by a press, the grooves H1 and H2 become a part of the groove- When the part of the part is pressed by the press, it has a form formed opposite to each other.

The head 20 has a function of sealing the hollow shaft 10 as one component constituting the piston rod and a function of being attached to the piston valve and the axle or the body of the automobile. The head 20 is configured to be screwed to the tapered nut portions 11 formed on both side ends of the hollow shaft 10, respectively.

5, each of the pair of heads 20 has a tapered bolt portion 21 threadedly engaged with the tapered nut portion 11 of the hollow shaft 10 at its outer periphery, A shaft portion 22 extending outward is formed.

 Here, the tapered bolt portion 21 is tapered in the same manner as the tapered nut portion 11, and the tapered inclination is the same as that of the tapered nut portion 11. The taper bolt portion 21 of the head 20 has a diameter corresponding to the tapered nut portion 11 formed on the hollow shaft 10 and is smaller in diameter in the opposite direction on one side where the shaft portion 22 is located It is processed with taper.

The inner diameter of the nut portion 11 of the hollow shaft 10 and the outer diameter of the bolt portion 21 of the head 10 are the same.

The shaft portion 22 formed on at least one of the pair of heads 20 may be formed with a bolt threaded portion on the outer circumferential surface thereof and may be provided with at least one of a pair of heads 20 coupled with a piston valve, The shaft portion 22 formed at one side can be configured so that the chucking portion 23 is formed on the outer side and can be fastened to the nut portion 11 by rotating the taper bolt portion 21 using a tool.

3, the first region A of the head 20, in which the taper bolt portion 21 is formed, is in contact with the tapered nut portion 11 in a state where the hollow shaft 10 and the head 20 are engaged with each other. The first side A1 of the first region A is located inside the hollow shaft 10 and the first side A of the first region A is located in the hollow of the hollow shaft 10 in which the first region A is formed, And the second side surface A2 is exposed to the outside of the hollow shaft 10. Here, the second side surface A2 is coplanar with the side surface of the hollow shaft 10, and the shaft portion 22 is formed in the central region.

3 and 6, the piston rod for a vehicle shock absorber according to the embodiment of the present invention has a welding portion A21 formed on the second side surface A2. The welding portion is formed along the abutment of the hollow shaft 10 and the head 20 at the second side surface A2 and is formed by welding by welding equipment.

The welding portion A21 has substantially the same shape as the outer periphery of the tapered bolt portion 21 and is formed by integrating the hollow shaft 10 and the head 20 to form a space formed by the hollow shaft 10 and the head 20. [ And the coupling force between the hollow shaft 10 and the head 20 is further increased.

Hereinafter, an example of a method of manufacturing a piston rod for a vehicle shock absorber according to an embodiment of the present invention will be described with reference to the accompanying drawings in order to facilitate understanding of the piston rod for an automobile shock absorber according to an embodiment of the present invention. do.

First, the raw material, that is, the hollow shaft material is cut to a set length corresponding to the length of the piston rod, and then a hollow having a predetermined diameter is formed therein. Here, the method of forming the hollow may be formed by any method conventionally used, such as a drawing process. It is preferable that the hollow shaft material is a steel pipe pipe, that is, a cylindrical pipe or a cylindrical barrel made of stainless steel having excellent durability and corrosion resistance.

When a hollow having a predetermined diameter is formed in the hollow shaft material, a hollow shaft 10 as shown in FIG. 4 is manufactured by forming the tapered nut portion 11 by machining the inner circumferential surface of the hollow at both ends in the hollow shaft material.

When the production of the hollow shaft 10 is completed, a pair of heads 20, which are respectively screwed to both side ends of the hollow shaft 10, are manufactured. At this time, each head 20 is made to have a function of sealing the hollow shaft 10, and a function of being attached to the axle or the body of the automobile.

To this end, the outer periphery of the cylindrical head material is machined to form the taper bolt portion 21. At this time, the taper bolt portion 21 is machined so as to be screwed to the taper nut portion 11. That is, the taper bolt portion 21 of the head 20 is machined to have a diameter corresponding to the tapered nut portion 11 formed on the hollow shaft 10, and the diameter of the tapered bolt portion 21 in the opposite direction It is tapered to become smaller and smaller.

Next, when the taper bolt portion 21 is formed, the shaft portion 22 is extended outward from the side surface of the taper bolt portion 21 to manufacture the head 20 as shown in Fig.

In another embodiment of the present invention, a bolt threaded portion may be formed on the outer periphery of the shaft portion 22 to couple the piston valve to the shaft portion 22 or to be coupled to the axle or the vehicle body of the vehicle. The chucking portion 23 can be formed and the bolt portion 21 can be rotated using a tool to be fastened to the tapered nut portion 11. [

When the hollow shaft 10 and the head 20 are completed, the taper bolt portion 21 of the head 20 is advanced toward the taper nut portion 11 side of the hollow shaft 10 as shown in Fig. 8 , The tapered bolt portion 21 is screwed to the tapered nut portion 11 as shown in Fig.

When the taper bolt portion 21 of the head 20 is assembled with the taper nut portion 11 of the hollow shaft 10 as described above, the compression load applied to the head 20 due to the taper inclination is increased, The center of the hollow shaft 10 and the head 20 can be easily assembled and assembled.

A method of manufacturing a piston rod for a vehicle shock absorber according to an embodiment of the present invention includes the steps of forming a taper nut portion 11 of a hollow shaft 10 and a taper nut portion 21 of a tapered bolt portion 21 of a head 20 11 and the outer diameter of the tapered bolt portion 21 are formed to have the same size.

Accordingly, the tapered nut portion 11 and the tapered bolt portion 21 are screwed to each other through the screw tightening method. The screwing through the tightening method further enhances the coupling force between the hollow shaft 10 and the head 20.

One method is to heat the portion of the tapered nut portion 11 of the hollow shaft 10 to a high temperature to expand the inner diameter of the tapered nut portion 11, The tapered bolt portion 21 of the hollow shaft 10 is forcedly engaged with the tapered nut portion 11 and hot assembled to further increase the coupling force between the hollow shaft 10 and the head 20. [

Another method is to cool the taper bolt portion 21 of the head 20 by cooling the taper bolt portion 21 of the head 20 to reduce the tapered bolt portion 21 11, the coupling strength between the hollow shaft 10 and the head 20 can be further increased.

Another method is to heat the portion of the tapered nut portion 11 of the hollow shaft 10 to a high temperature to expand the inner diameter of the tapered nut portion 11 and to cool the tapered bolt portion 21 portion of the head 20 The taper bolt portion 21 of the head 20 is securely fastened to the taper nut portion 11 by assembling the hollow shaft 10 and the head 20 in a state in which the taper bolt portion 21 is reduced in outer diameter, Thereby further increasing the bonding force.

6, the nut portion 11 of the hollow shaft 10 and the bolt portion 21 of the head 20 are fixed to each other by the tapered bolt portion 21 and the tapered nut portion 11, The outer circumferential peripheral portion of the hollow shaft 10 on which the hollow shaft 10 is located is pressed by a press to perform plastic deformation.

The outer circumferential edge portion of the hollow shaft 10 is pressed by the press to perform the plastic deformation so that the pressing force of the press is transmitted to the nut portion 11 and the bolt portion 21 fastened to each other, Plastic deformation is generated in the bolt portion 21, thereby maximizing the fastening force.

On the other hand, as described above, the plastic deformation step may press the entire circumference of the outer periphery of the hollow shaft 10 where the nut portion 11 and the bolt portion 21 are located, It is most preferable to press a part of the outer circumferential edge portion of the hollow shaft 10 at this time because a part of the range is in the range of It will be apparent that various modifications may be made to those skilled in the art by determining the extent to which the clamping force can be maximized.

Finally, in the method of manufacturing a piston rod for an automobile shock absorber according to an embodiment of the present invention, when the plastic deformation step is completed, as shown in FIG. 10, the joint of the hollow shaft 10 and the head 20 Thereby forming the welded portion A21.

Since the welding surface is composed of the nut portion 11 and the bolt portion 21, it is obvious that friction welding is inevitable, and electron beam welding or laser welding is performed so that chip generation can be minimized Most preferred.

The contact surface of the head 20 and the hollow shaft 10 is conventionally welded to the hollow shaft (not shown) as the operator is able to weld for forming the welded portion A21 with the welding equipment facing the second side surface A2. 10). ≪ / RTI >

That is, in the case of welding the head 20 and the hollow shaft 10 from the side as in the conventional case, a post-process for removing the welding by-products (ex: beads) Thereby preventing the problem of leakage of oil due to damage of the O-ring for preventing oil leakage due to welding by-products.

However, since the present invention has a structure in which the head 20 and the hollow shaft 10 can be welded on the upper and lower surfaces of the piston rod, that is, the second side surface A2, there is a situation where the oil- Do not. Further, in manufacturing the piston rod, a post-processing process for removing the welding by-products after welding of the head 20 and the hollow shaft 10 is not required. Accordingly, the present invention realizes the effect of increasing workability and productivity since there is little need for such a subsequent machining step.

Further, the present invention can realize the effect of reducing the manufacturing cost since the coupling force between the hollow shaft 10 and the head 20 is excellent and the post-processing is almost not required.

The embodiments of the present invention described above are not only implemented by the apparatus and method but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, The embodiments can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

10: hollow shaft 11: taper nut part
20: head 21: tapered bolt part
22: shaft portion 23: chucking portion
100: cylinder 200: piston rod
300: holder A: first region
A1: First aspect A2: Second aspect
A21:

Claims (5)

A hollow shaft (10) having a predetermined length and having a tapered nut (11) formed on the inner peripheral surface at both ends thereof;
And a head (20) having a tapered bolt (21) formed on its outer periphery so as to be screwed to the tapered nut part (11) of the hollow shaft (10)
The head 20 is screwed to the hollow shaft 10 and then the outer circumferential portion of the hollow shaft 10 at which the taper nut portion 11 and the tapered bolt portion 21 are located is subjected to plastic deformation Respectively,
The hollow shaft 10 is hollowed with a predetermined diameter therein, while the tapered nut portion 11 is formed on the inner peripheral surface of the hollow at both ends. The tapered nut portion 11 is formed in an inner side The inner diameter is tapered so as to be smaller,
The tapered bolt portion 21 of the head 20 is machined to have a diameter corresponding to the tapered nut portion 11 and is formed on one side of the shaft portion with a diameter smaller than the diameter of the tapered bolt portion 21 22 is extended and a chucking portion 23 is formed on the outer side of the shaft portion 22,
The inclination of the tapered nut portion 11 and the tapered bolt portion 21 is in the range of 1 to 2.5 degrees with respect to the center line,
The inner diameter of the nut portion 11 of the hollow shaft 10 and the outer diameter of the bolt portion 21 of the head 10 are machined to the same size and then the nut portion 11 of the hollow shaft 10 is heated to a high temperature In a state in which the inner diameter of the nut portion 11 is expanded and a portion where the bolt portion 21 of the head 10 is cooled to a low temperature to shrink the outer diameter of the bolt portion 21 of the head 10, The bolt portion 21 of the nut 20 is fastened to the nut portion 11,
Wherein a joint portion between the hollow shaft (10) and the head (20) is welded with a laser. delete delete delete delete
KR1020150097392A 2015-07-08 2015-07-08 Shock absorber piston rod for car KR101726712B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150097392A KR101726712B1 (en) 2015-07-08 2015-07-08 Shock absorber piston rod for car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150097392A KR101726712B1 (en) 2015-07-08 2015-07-08 Shock absorber piston rod for car

Publications (2)

Publication Number Publication Date
KR20170006571A KR20170006571A (en) 2017-01-18
KR101726712B1 true KR101726712B1 (en) 2017-04-13

Family

ID=57992214

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150097392A KR101726712B1 (en) 2015-07-08 2015-07-08 Shock absorber piston rod for car

Country Status (1)

Country Link
KR (1) KR101726712B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111113006B (en) * 2020-01-17 2021-05-18 宁波力品格自动化科技有限公司 Hollow rod assembly pre-assembly equipment of controllable gas spring

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008055483A (en) * 2006-08-31 2008-03-13 Hitachi Ltd Butt joining method, mechanical clinching device and method of manufacturing joining rod and cylinder device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848798C1 (en) * 1998-10-23 2000-06-21 Mannesmann Sachs Ag Piston-cylinder unit comprises work cylinder in which piston connected to connecting rod moved axially and fixture components of which at least one is screwed into threaded hole in connecting rod
KR100391419B1 (en) 2000-10-06 2003-07-16 현대자동차주식회사 Shock absorber for vehicles
KR100455211B1 (en) 2000-12-27 2004-11-08 주식회사 만도 Oil seal use in a shock absorber
US6837344B2 (en) * 2001-02-12 2005-01-04 Delphi Technologies, Inc. Piston and rod assembly for air-actuated variable damping
KR100798141B1 (en) 2002-01-16 2008-01-28 주식회사 만도 Gas filling method for shock absorber and shock absorber of use it
KR100792189B1 (en) 2006-03-03 2008-01-07 주식회사 카스 A shock absorber
KR20080081485A (en) * 2007-03-05 2008-09-10 주식회사 만도 Piston rod for shock absorber

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008055483A (en) * 2006-08-31 2008-03-13 Hitachi Ltd Butt joining method, mechanical clinching device and method of manufacturing joining rod and cylinder device

Also Published As

Publication number Publication date
KR20170006571A (en) 2017-01-18

Similar Documents

Publication Publication Date Title
US9328749B2 (en) Bracket-less clamping assembly
JP5472856B2 (en) Rudder stock
US20190152283A1 (en) Ball joint and manufacturing method thereof
US20030160372A1 (en) Fixing element with multifunctional fixing component
JP2010241420A6 (en) Rudder stock
US20120024647A1 (en) Cylinder apparatus, method for manufacturing the same, and shock absorber
KR101726712B1 (en) Shock absorber piston rod for car
JPH0155699B2 (en)
CN107414674A (en) Inner hole of workpiece swelling fixture
JP5873737B2 (en) Manufacturing method of rod
EP3395661A1 (en) Rear cushion device
KR20170006567A (en) Shock absorber piston rod for car
JP4577345B2 (en) Knuckle and knuckle manufacturing method
KR20170006569A (en) Shock absorber piston rod for car
US10914355B2 (en) Bushings for damping vibrations in a vehicle
KR20170006564A (en) Manufacturing methods of shock absorber piston rod for car
KR100297236B1 (en) Joint structure for reaction rod
KR20170006578A (en) Shock absorber piston rod for car
KR20170006575A (en) Shock absorber piston rod for car
KR101617163B1 (en) Bumper beam unit for vehicle
US10875572B2 (en) Steering or track rod having an integral connecting pipe
CN104100672B (en) Supporting arrangement for the shock absorber of motor vehicle
US20070283561A1 (en) Method of manufacturing a modular damper
CN115539566A (en) Radial variable stiffness adjusting method and device of spherical hinge for suspension vibration reduction
RU2494906C2 (en) Steering rack body with transverse tapers

Legal Events

Date Code Title Description
A201 Request for examination
A302 Request for accelerated examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant