CN109869434B

CN109869434B - Universal piston rod

Info

Publication number: CN109869434B
Application number: CN201910218379.6A
Authority: CN
Inventors: 徐超
Original assignee: Shandong Taijin Machinery Equipment Co ltd
Current assignee: Shandong Taijin Mechanical Equipment Co ltd
Priority date: 2019-02-13
Filing date: 2019-03-21
Publication date: 2021-05-04
Anticipated expiration: 2039-03-21
Also published as: CN109869434A

Abstract

The invention discloses a universal piston rod, which comprises: the adjusting device comprises a main rod, wherein a through hole which is through up and down is arranged at the axis position of the main rod, the upper part of the through hole is an adjusting section, the lower part of the through hole is a threaded section, the adjusting section consists of 3 square cavities which are mutually different by 120 degrees, the width of the section of each square cavity is smaller than the diameter of the threaded section, the length of the section is larger than the diameter of the threaded section, meanwhile, every two jacking screw holes corresponding to the square cavities are arranged on the side wall of the adjusting section, and jacking screws are screwed in the jacking screw holes; the upper part of the upper connecting rod is a cylindrical piston connector, and the lower part of the upper connecting rod is an insertion section which is matched with the square cavity so that the section of the insertion section is rectangular; the upper part of the lower connecting rod is screwed in the threaded section; and the heights of the 3 square cavities are different. The invention has the advantages that: the universality is stronger.

Description

Universal piston rod

Technical Field

The invention relates to the technical field of motor vehicle accessories, in particular to a universal piston rod.

Background

The piston rod is one of the most important parts in a shock absorber. Generally, the length of the piston rod is fixed, so that only one piston rod can be used for one type of shock absorber. Thus, the piston rod is single in use and cannot meet the current trend of low stock and increased versatility of components.

Disclosure of Invention

The invention aims to provide a universal piston rod which has the characteristic of high universality.

The technical scheme adopted by the invention is as follows: a universal piston rod, the universal piston rod comprising:

the adjusting device comprises a main rod, wherein a through hole which is through up and down is arranged at the axis position of the main rod, the upper part of the through hole is an adjusting section, the lower part of the through hole is a threaded section, the adjusting section consists of 3 square cavities which are mutually different by 120 degrees, the width of the section of each square cavity is smaller than the diameter of the threaded section, the length of the section is larger than the diameter of the threaded section, meanwhile, every two jacking screw holes corresponding to the square cavities are arranged on the side wall of the adjusting section, and jacking screws are screwed in the jacking screw holes;

the upper part of the upper connecting rod is a cylindrical piston connector, and the lower part of the upper connecting rod is an insertion section which is matched with the square cavity so that the section of the insertion section is rectangular;

the upper part of the lower connecting rod is screwed in the threaded section; and

the heights of the 3 square cavities are different.

The lateral wall of the joint part of the adjusting section and the thread section is provided with compression screw holes, the axial leads of the compression screw holes correspond to the bottoms of the square cavities in pairs, compression screws are screwed in the compression screw holes, and the inner ends of the compression screws are conical.

The main rod, the upper connecting rod and the lower connecting rod are made of the same materials, and the materials comprise the following components in percentage: si: 7.5-8.5%, Fe: 0.5 to 1.0%, Cu: 3.0 to 4.0%, Mn: 0.3-0.5%, Mg: 0.03 to 0.1%, Ni: 0.3 to 0.5%, Zn: 0.3 to 0.5%, Sn: 0.1-0.35%, La: 0.05-0.08%, Sc: 0.03 percent, and the balance of Al.

Compared with the prior art, the invention has the advantages that: the universality is stronger. The upper connecting rod of the universal piston rod can be inserted into different square cavities, so that the universal piston rod has different insertion depths. Meanwhile, the lower connecting rod can adjust the depth of the screw thread in the thread section, and finally the effect of combining stepless adjustment and multi-stage adjustment is achieved, so that the total length of the piston rod can be adjusted in a large range and accurately as required, and the use is convenient. And the lower end of the upper connecting rod can be tightly propped against the bottom of the corresponding square cavity, so that the stability of the piston rod structure is ensured. In addition, through reasonably configuring the components of the main rod, the upper connecting rod and the lower connecting rod which are easy to be lost, particularly through adding a small amount of rare earth elements, crystal grains are refined and uniform, and the hardness, the toughness and the surface wear resistance of the product are further improved.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a top view of a boom of the present invention;

FIGS. 2, 3 and 4 are views A-A, B-B, C-C, respectively, of FIG. 1 (with the upper link shown in FIG. 2);

fig. 5 is a schematic plan view of the structure of the through hole of the present invention.

In the figure:

10. the main rod 11, the adjusting section 111, the square cavity 112, the jacking screw hole 113, the jacking screw 12, the thread section 13, the compression screw hole 14 and the compression screw;

20. an upper connecting rod 21, a piston connector 22 and an insertion section;

30. a lower connecting rod.

Detailed Description

Examples, see fig. 1-4: a universal piston rod comprising: main rod 10, upper link 20, lower link 30, etc. Wherein, the upper end of the upper connecting rod 20 is used for connecting the piston, and the lower end of the lower connecting rod 30 is used for connecting the support nut.

Specifically, the method comprises the following steps:

the axis of the main rod 10 is provided with a through hole which is through up and down. The upper part of the through hole is provided with an adjusting section 11, and the lower part of the through hole is provided with a threaded section 12. That is, the lower end of the adjustment section 11 and the upper end of the threaded section 12 are in communication. The adjusting section 11 is formed by 3 square cavities 111 differing from each other by 120 °. The square cavity 111 refers to a square cylindrical cavity with a rectangular cross section. Referring to fig. 5, the adjusting section 11 is formed by 3 square cavities 111 with a phase difference of 120 °, which means that the center positions of the 3 square cavities 111 are preferably overlapped, and the phase difference between the adjacent square cavities 111 is 120 °. The width of the cross section of the square cavity 111 is smaller than the diameter of the threaded section 12, and the length of the cross section is larger than the diameter of the threaded section 12. The 3 square cavities 111 differ in height. Meanwhile, the side wall of the adjusting section 11 is provided with two tightening screw holes 112 corresponding to the square cavity 111, and tightening screws 113 are screwed in the tightening screw holes 112. Namely, at least 3 jacking screw holes 112 are provided, and the inner ends of the jacking screws 113 can enter the corresponding square cavities 111 after being screwed.

The upper connecting rod 20 has a cylindrical piston connector 21 at its upper part and an insertion section 22 at its lower part, which fits into the square cavity 111 and has a rectangular cross section. That is, the lower portion of the upper link 20 can be inserted into the square cavity 111 from the top to the bottom.

The upper portion of the lower link 30 is threaded into the threaded section 12. That is, the upper portion of the lower link 30 has an external thread.

Thus, the upper link 20 can be inserted into different square cavities 111, thereby having different insertion depths. Meanwhile, the lower connecting rod 30 can adjust the depth of the screw connection in the threaded section 12, and finally the effect of combining stepless adjustment and multi-stage adjustment is achieved, so that the total length of the piston rod can be adjusted as required. And the lower end of the upper connecting rod 20 can be tightly pressed against the bottom of the corresponding square cavity 111, so that the stability of the piston rod structure is ensured.

Optimizing:

the side wall of the joint part of the adjusting section 11 and the corresponding thread section 12 is provided with a pressing screw hole 13, and the axial lead of the pressing screw hole 13 corresponds to the bottom of the square cavity 111 in pairs. More precisely, the axial lines of the pressing screw holes 13 correspond two by two through the plane of the bottom of the corresponding square cavity 111. A compression screw 14 is screwed in the compression screw hole 13, and the inner end of the compression screw 14 is conical. Thus, when the upper link 20 is taken out from the corresponding square cavity 111 for a certain period of time, it is highly likely that it is difficult to take out. At this time, only by tightening the corresponding pressing screw 14, the inner end of the pressing screw 14 is pressed against the bottom of the upper link 20, so that the upper link 20 can be taken out. I.e. to facilitate readjustment.

And (4) continuing optimization:

the main rod 10, the upper connecting rod 20 and the lower connecting rod 30 are made of the same materials, and the materials are as follows by percentage: si: 7.5-8.5%, Fe: 0.5 to 1.0%, Cu: 3.0 to 4.0%, Mn: 0.3-0.5%, Mg: 0.03 to 0.1%, Ni: 0.3 to 0.5%, Zn: 0.3 to 0.5%, Sn: 0.1-0.35%, La: 0.05-0.08%, Sc: 0.03 percent, and the balance of Al. For example, the material components are: si: 7.5%, Fe: 0.5%, Cu: 3.0%, Mn: 0.3%, Mg: 0.03%, Ni: 0.3%, Zn: 0.3%, Sn: 0.1%, La: 0.05%, Sc: 0.03 percent, and the balance of Al; alternatively, the material components are: si: 8%, Fe: 0.8%, Cu: 3.5%, Mn: 0.4%, Mg: 0.06%, Ni: 0.4%, Zn: 0.4%, Sn: 0.2%, La: 0.06%, Sc: 0.03 percent, and the balance of Al; alternatively, the material components are: si: 8.5%, Fe: 1.0%, Cu: 4.0%, Mn: 0.5%, Mg: 0.1%, Ni: 0.5%, Zn0.5%, Sn: 0.35%, La: 0.08%, Sc: 0.03 percent, and the balance of Al. Through metallographic test, by adding a very small amount of rare earth elements, the length of silicon crystal can be between 56.55um and 99.25um, and the silicon crystal is relatively dense, so that the mechanical properties of the main rod 10, the upper connecting rod 20 and the lower connecting rod 30 are improved, and the wear resistance is greatly improved. Meanwhile, compared with the common aluminum-magnesium alloy, the main rod 10, the upper connecting rod 20 and the lower connecting rod 30 have low Si content, the film thickness is easy to form when the product is oxidized, and no yellowing phenomenon is found on the surface of the product after the oxidation. And, the aluminum content is relatively high, and the hardness after oxidation is high. Therefore, compared with the common aluminum-magnesium alloy product, the service life of the product can be prolonged by at least 60%, and no special requirement is required on the preparation method.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. General type piston rod, its characterized in that: the universal piston rod includes:

the adjusting device comprises a main rod (10), wherein an upper through hole and a lower through hole are formed in the axis position of the main rod (10), the upper part of the through hole is an adjusting section (11), the lower part of the through hole is a threaded section (12), the adjusting section (11) is composed of 3 square cavities (111) with a mutual difference of 120 degrees, the width of the section of each square cavity (111) is smaller than the diameter of the threaded section (12), the length of the section of each square cavity is larger than the diameter of the threaded section (12), meanwhile, jacking screw holes (112) corresponding to the square cavities (111) in pairs are formed in the side wall of the adjusting section (11), and jacking screws (113) are screwed in the jacking screw holes (112);

the upper part of the upper connecting rod (20) is a cylindrical piston connector (21), and the lower part of the upper connecting rod (20) is an insertion section (22) which is matched with the square cavity (111) and has a rectangular cross section;

the upper part of the lower connecting rod (30) is screwed in the threaded section (12); and

the heights of the 3 square cavities (111) are different.

2. The universal piston rod according to claim 1, wherein: the lateral wall of the joint part of the adjusting section (11) and the threaded section (12) is provided with pressing screw holes (13), the axial lead of each pressing screw hole (13) corresponds to the bottom of the square cavity (111) in pairs, pressing screws (14) are screwed in the pressing screw holes (13), and the inner ends of the pressing screws (14) are conical.

3. The universal piston rod according to claim 1, wherein: the main rod (10), the upper connecting rod (20) and the lower connecting rod (30) are the same in material components, and the material components are as follows by percentage: si: 7.5-8.5%, Fe: 0.5 to 1.0%, Cu: 3.0 to 4.0%, Mn: 0.3-0.5%, Mg: 0.03 to 0.1%, Ni: 0.3 to 0.5%, Zn: 0.3 to 0.5%, Sn: 0.1-0.35%, La: 0.05-0.08%, Sc: 0.03 percent, and the balance of Al.