WO2016039123A1 - 流体圧シリンダ - Google Patents
流体圧シリンダ Download PDFInfo
- Publication number
- WO2016039123A1 WO2016039123A1 PCT/JP2015/073658 JP2015073658W WO2016039123A1 WO 2016039123 A1 WO2016039123 A1 WO 2016039123A1 JP 2015073658 W JP2015073658 W JP 2015073658W WO 2016039123 A1 WO2016039123 A1 WO 2016039123A1
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- WIPO (PCT)
- Prior art keywords
- fluid pressure
- pressure cylinder
- rod
- film
- piston
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1433—End caps
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J7/00—Piston-rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
- F15B2215/305—Constructional details thereof characterised by the use of special materials
Definitions
- the present invention relates to a fluid pressure cylinder that displaces a piston along an axial direction under the action of a working fluid.
- This type of fluid pressure cylinder includes a cylinder body in which a cylinder hole is formed, a piston disposed in the cylinder hole and displaced along the axial direction under the action of a working fluid, a piston rod connected to the piston, And a rod cover provided on the inner wall surface constituting the cylinder hole and formed with a rod insertion hole through which the piston rod is inserted (see, for example, JP-A-2009-68557).
- the rod insertion hole is provided with a cylindrical bush that supports the piston rod so as to be slidable in the axial direction.
- the bush is removed and an aluminum piston rod is used to form an alumite film that slidably contacts the piston rod on the inner wall surface constituting the rod insertion hole.
- adhesive wear between the piston rod and the alumite film occurs, so that the life of the fluid pressure cylinder may be shortened.
- the present invention has been made in consideration of such problems, and can reduce the number of parts, reduce the weight and extend the life, and can be used in an environment in which a copper-based material is not used.
- the object is to provide a cylinder.
- a fluid pressure cylinder includes a cylinder body in which a cylinder hole is formed, and a piston that is disposed in the cylinder hole and is displaced along an axial direction under the action of a working fluid.
- a fluid pressure cylinder comprising: a piston rod connected to the piston; and a rod cover having a rod insertion hole through which the piston rod is inserted, wherein the piston rod and the rod cover are made of aluminum or an aluminum alloy.
- An anodized film or a diamond-like carbon film is formed on at least a part of the inner wall surface of the rod cover constituting the rod insertion hole, and the inner wall surface of the rod cover is formed on the outer wall surface of the piston rod.
- the alumite film When the alumite film is formed on the alumite film, it contacts the anodized film Ear Mondo-like carbon film is formed, characterized in that the sliding contact anodized aluminum film on the diamond-like carbon film when the diamond-like carbon film on the inner wall surface is formed of the rod cover are formed.
- the diamond-like carbon film (anodized film) formed on the outer wall surface of the piston rod slides against the anodized film (diamond-like carbon film) formed on the inner wall surface of the rod cover. Adhesive wear can be suppressed. Thereby, the lifetime of the fluid pressure cylinder can be extended.
- the rod cover and the piston rod are made of aluminum or an aluminum alloy and there is no need to provide a copper bush in the rod insertion hole, the number of parts can be reduced and the weight can be reduced. It can also be used in an environment where no system material is used.
- the anodized film may be formed on the inner wall surface of the rod cover, and the diamond-like carbon film that is in sliding contact with the anodized film may be formed on the outer wall surface of the piston rod.
- the manufacturing cost of the fluid pressure cylinder can be reduced.
- a housing groove for housing a lubricant may be formed on the inner wall surface of the rod cover. According to such a configuration, since the lubricant can be supplied between the alumite film and the diamond-like carbon film, the life of the fluid pressure cylinder can be further extended. In addition, since the housing groove can be formed at the position where the bush is conventionally disposed, it is possible to suppress an increase in the size of the fluid pressure cylinder even when the housing groove is formed.
- the fluid pressure cylinder according to the present invention can reduce the number of parts, reduce the weight and extend the life, and can be used in an environment where a copper-based material is not used.
- FIG. 1 is a longitudinal sectional view of a fluid pressure cylinder according to an embodiment of the present invention.
- FIG. 2 is a partially enlarged longitudinal sectional view illustrating the configuration of the fluid pressure cylinder according to the first embodiment.
- FIG. 3 is a partially enlarged longitudinal sectional view showing the configuration of the fluid pressure cylinder according to the second embodiment (the fluid pressure cylinder according to the comparative example 1).
- FIG. 4 is a partially enlarged longitudinal sectional view illustrating the configuration of the fluid pressure cylinder according to the third embodiment.
- FIG. 5 is a partially enlarged longitudinal sectional view showing a configuration of a fluid pressure cylinder according to Comparative Example 2.
- FIG. 6 is a graph showing the minimum operating pressure with respect to the number of piston driving times.
- FIG. 7 is a graph showing the maximum wear depth of the alumite film after the piston has been driven 10 million times.
- a fluid pressure cylinder (sliding device) 10 includes a cylinder body 14 in which a cylinder hole 12 is formed, and the cylinder hole 12 can be displaced along the axial direction.
- the piston 16 is provided, the piston rod 18 connected to the piston 16, and the rod cover 22 provided in the cylinder body 14 and having a rod insertion hole 20 through which the piston rod 18 is inserted.
- the cylinder body 14 can be made of any material, but is integrally formed in a bottomed cylindrical shape with, for example, aluminum or an aluminum alloy. However, the cylinder body 14 may be configured to be mounted so that the opening on one side of the tube member opened at both ends is closed by the end cover.
- 1st port 24 and 2nd port 26 which are connected to a fluid supply source via the channel and channel switching device which are not illustrated in the outside side of cylinder body 14 are opened.
- the first port 24 communicates with the first cylinder chamber 28 formed between the piston 16 and the bottom surface of the cylinder body 14 via the first communication passage 30.
- the second port 26 communicates with a second cylinder chamber 32 formed between the piston 16 and the rod cover 22 via a second communication path 34.
- the piston 16 can be composed of any material, but is composed of, for example, aluminum or an aluminum alloy in a cylindrical shape.
- a piston packing 38 is mounted on the outer peripheral surface of the piston 16 via an annular groove 36.
- a magnet for detecting the position of the piston 16 in the axial direction relative to the cylinder body 14 may be attached to the outer peripheral surface of the piston 16.
- a sensor mounting groove for mounting a magnetic detection sensor for detecting the magnetism of the magnet is formed on the outer surface of the cylinder body 14.
- the piston rod 18 is made of aluminum or aluminum alloy in a cylindrical shape, and one end thereof is connected to the piston 16. Thereby, the piston rod 18 is interlocked with the piston 16.
- a mounting hole 40 for attaching a workpiece or the like is formed on the other end surface of the piston rod 18 that is inserted through the rod insertion hole 20 and exposed to the outside of the cylinder body 14.
- a diamond-like carbon film (hereinafter referred to as a DLC film 42) is formed on the outer peripheral surface (outer wall surface) of the piston rod 18.
- the DLC film 42 is an amorphous hard film made of an allotrope of hydrocarbon or carbon, and is excellent in lubricity, wear resistance, seizure resistance, and the like.
- the DLC film 42 can be formed by an environmentally friendly CVD (Chemical Vapor Deposition) method, a PVD (Physical Vapor Deposition) method, or the like that does not generate waste liquid.
- An intermediate layer may be formed between the base material and the DLC film 42 in order to improve the adhesion between the DLC film 42 and the base material (piston rod 18).
- middle layer can be comprised with the composite layer of a base material and DLC, for example.
- the composition ratio of the metal increases as it approaches the base material, while the composition ratio of DLC decreases, and the composition ratio of the metal decreases as it moves away from the base material, while the composition ratio of DLC decreases. growing.
- the hardness of the DLC film 42 increases as the distance from the base material increases toward the outer surface side. Specifically, the Vickers hardness in the vicinity of the base material of the DLC film 42 is set to 900 Hv or less, and the Vickers hardness of the outermost surface is set to 1300 Hv or more. Thereby, peeling from the base material of the DLC film 42 is suppressed more suitably. Moreover, the surface roughness of the DLC film 42 is set to 1.6 Rz or less. Thereby, abrasion of the rod packing 52 described later can be suitably suppressed.
- the DLC film 42 is colored with a color (for example, black) different from the color (metal color) of aluminum or aluminum alloy. In this case, it can be easily recognized that the DLC film 42 is peeled and the underlying aluminum or aluminum alloy is exposed. Therefore, it is possible to take appropriate measures before the equipment is stopped due to the life of the fluid pressure cylinder 10.
- the film thickness of the DLC film 42 is preferably set to 0.1 ⁇ m or more and 5.0 ⁇ m or less, more preferably 0.3 ⁇ m or more and 4.0 ⁇ m or less, and more preferably 1.0 ⁇ m or more and 4.0 ⁇ m or less. If the film thickness of the DLC film 42 is smaller than 0.1 ⁇ m, there is a concern that the DLC film 42 may be peeled off prematurely due to wear. Because it invites.
- the rod cover 22 is formed in an annular shape from aluminum or an aluminum alloy, and supports the piston rod 18 in a state of being provided on the wall surface forming the cylinder hole 12. Further, the rod cover 22 is prevented from coming off from the cylinder hole 12 by a ring-shaped retaining ring 46 attached to a wall surface constituting the cylinder hole 12 via an annular groove 44.
- a gasket 50 is mounted on the outer peripheral surface of the rod cover 22 via an annular groove 48.
- the inner circumferential surface (inner wall surface) of the rod cover 22 has an annular groove 54 in which a rod packing 52 made of a resin material such as urethane rubber is mounted, and a grease storage groove (grease) in which grease (lubricant) is stored. 56) is formed.
- the grease containing groove 56 is located on the side of the retaining ring 46 (on the side opposite to the piston 16) from the annular groove 54.
- An anodized film 58 that slides on the DLC film 42 is formed on at least a part of the inner peripheral surface of the rod cover 22.
- the anodized film 58 is preferably a hard anodized film described in JIS8603. In this case, the wear resistance of the alumite film 58 can be further improved. However, the anodized film 58 may not be the hard anodized film.
- the dimension along the axial direction of the grease containing groove 56 is 1/5 or more and 4/5 or less of the sliding surface length dimension (the length dimension along the axial direction of the anodized film 58 slidably contacting the DLC film 42). Is set to Thereby, grease can be efficiently supplied between the DLC film 42 and the alumite film 58 while appropriately suppressing the pressure acting on the alumite film 58 from the piston rod 18.
- the fluid pressure cylinder 10 is basically configured as described above, and the operation and effects thereof will be described next. As shown in FIG. 1, the state where the piston 16 is located on the bottom surface side of the cylinder body 14 will be described as an initial position.
- the piston 16 is moved to the cylinder by the action of the working fluid flowing into the second cylinder chamber 32.
- the fluid that is displaced to the bottom surface side of the main body 14 and is present in the first cylinder chamber 28 is discharged into the atmosphere through the first port 24.
- the piston 16 contacts the bottom surface of the cylinder body 14, the displacement of the piston 16 toward the bottom surface of the cylinder body 14 is stopped.
- the grease accommodated in the grease accommodating groove 56 is formed on the outer peripheral surface of the piston rod 18.
- the DLC film 42 slides on the anodized film 58 in a state where the DLC film 42 is supplied between the anodized film 58 and the anodized film 58 formed on the inner peripheral surface of the rod cover 22.
- the DLC film 42 has chemical stability and self-lubricating properties that prevent adhesion with aluminum or anodized. Therefore, the piston rod 18 is displaced in a state where sliding wear and adhesive wear are suppressed. Thereby, the lifetime of the fluid pressure cylinder 10 can be extended.
- piston rod 18 and the rod cover 22 are made of aluminum or an aluminum alloy and there is no need to provide a copper bush in the rod insertion hole 20, the number of parts can be reduced and the weight can be reduced. In addition, it can be used in an environment where no copper-based material is used.
- the manufacturing cost of the fluid pressure cylinder 10 can be reduced. Furthermore, since the grease containing groove 56 for containing the grease is formed on the inner peripheral surface of the rod cover 22, the grease is supplied between the DLC film 42 and the alumite film 58 to slide the rod cover 22. Can be suppressed. Thereby, the lifetime of the fluid pressure cylinder 10 can be further extended.
- the grease accommodation groove 56 may be deleted (see FIG. 3), or the grease accommodation groove 56 may be formed closer to the piston 16 than the rod packing 52 (see FIG. 4).
- the alumite film 58 may be formed on the outer peripheral surface of the piston rod 18, and the DLC film 42 that is in sliding contact with the alumite film 58 may be formed on the inner peripheral surface of the rod cover 22. Even in these cases, the same effects as the above-described configuration are obtained.
- Example 1 A fluid pressure cylinder 10a according to Example 1 shown in FIG. 2 was produced.
- the fluid pressure cylinder 10a is configured similarly to the fluid pressure cylinder 10 described above.
- the piston rod 18 is made of an aluminum alloy (A2017: JIS standard), and the DLC film 42 is formed on the outer peripheral surface of the piston rod 18 with a film thickness of 1 ⁇ m to 2 ⁇ m.
- the rod cover 22 was made of an aluminum alloy (A6061-T6: JIS standard), and an alumite film (hard anodized film) 58 was formed on the inner peripheral surface of the rod cover 22 with a film thickness of 15 ⁇ m.
- the length dimension along the axial direction of the rod cover 22 according to the first embodiment was defined as La.
- the diameter of the piston rod 18 was 16 mm, and the stroke of the piston 16 was 50 mm.
- Example 2 A fluid pressure cylinder 10b according to Example 2 shown in FIG. 3 was produced. That is, the fluid pressure cylinder 10b according to Example 2 was manufactured in the same manner as Example 1 except that the grease accommodating groove 56 was omitted.
- Example 3 A fluid pressure cylinder 10c according to Example 3 shown in FIG. 4 was produced.
- the constituent materials of the piston rod 18 and the rod cover 22, the film thicknesses of the DLC film 42 and the alumite film 58, the diameter of the piston rod 18 and the stroke of the piston 16 are the same as in the first embodiment. Set to.
- the length dimension along the axial direction of the rod cover 22 according to Example 3 was set to Lb longer than La.
- a grease containing groove 56 is formed on the piston 16 side with respect to the rod packing 52.
- Comparative Example 1 Comparative Example 1 was performed in the same manner as in Example 2 except that the piston rod 18 was made of carbon steel (S45C: JIS standard) and the hard chrome film 102 was formed on the outer peripheral surface of the piston rod 18 to a thickness of 8 ⁇ m. A fluid pressure cylinder 100a according to the above was manufactured (see FIG. 3).
- Comparative Example 2 A fluid pressure cylinder 100b according to Comparative Example 2 shown in FIG. 5 was produced.
- a bushing groove 106 in which a bush 104 made of lead bronze is disposed is formed instead of the grease accommodating groove 56 according to the third embodiment.
- the piston rod 18 and the hard chrome coating 102 were the same as those in Comparative Example 1, and the others were produced in the same manner as in Example 3.
- the weight of the fluid pressure cylinder 100a according to Comparative Example 1 was 320 g, whereas the weight of the fluid pressure cylinder 10a according to Example 1 was 230 g. That is, by configuring the piston rod 18 with an aluminum alloy, the fluid pressure cylinder 10a can be reduced in weight by about 28% of the weight of the fluid pressure cylinder 100a.
- the weight of the fluid pressure cylinder 100b according to Comparative Example 2 was 350 g, whereas the weight of the fluid pressure cylinder 10c according to Example 3 was 260 g.
- the piston rod 18 is made of an aluminum alloy and the lead bronze bush 104 is eliminated, whereby the fluid pressure cylinder 10c can be reduced by about 25% of its weight relative to the fluid pressure cylinder 100b. did it.
- the fluid pressure cylinder 10c according to the third embodiment forms the grease accommodation groove 56 at the position where the bush 104 is disposed in the fluid pressure cylinder 100b according to the comparative example 2, such a grease accommodation groove is provided. Even if 56 is formed, the fluid pressure cylinder 10c does not increase in size.
- the DLC film 42 is formed on the outer peripheral surface of the piston rod 18 and the alumite film 58 is formed on the inner peripheral surface of the rod cover 22, so that the minimum operating pressure can be achieved even when the number of piston driving times reaches 10 million times. Was kept relatively low, and the life could be extended. Further, when the grease containing groove 56 is provided on the inner peripheral surface of the rod cover 22, the minimum operating pressure after the piston 16 is driven 10 million times is lower than when the grease containing groove 56 is not provided. The service life could be further extended.
- the maximum wear depth of the fluid pressure cylinder 10a according to the first embodiment is about 1 / th of the maximum wear depth of the alumite film 58 of the fluid pressure cylinder 100a according to the first comparative example.
- the life of the fluid pressure cylinder 10a can be further extended.
- the fluid pressure cylinder according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.
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Abstract
Description
以下に本発明の実施例を挙げて本発明をさらに具体的に説明する。なお、以下の実施例に示される材質、構成、膜厚等は、本発明の趣旨を逸脱しない限り適宜変更することができる。従って、本発明の技術的範囲は以下に示す具体例により限定的に解釈されるべきものではない。
図2に示す実施例1に係る流体圧シリンダ10aを作製した。この流体圧シリンダ10aは、上述した流体圧シリンダ10と同様に構成されている。具体的には、ピストンロッド18をアルミニウム合金(A2017:JIS規格)で構成し、ピストンロッド18の外周面にDLC皮膜42を1μm~2μmの膜厚で成膜した。また、ロッドカバー22をアルミニウム合金(A6061-T6:JIS規格)で構成し、ロッドカバー22の内周面にアルマイト皮膜(硬質アルマイト皮膜)58を15μmの膜厚で成膜した。この実施例1に係るロッドカバー22の軸線方向に沿った長さ寸法をLaとした。なお、ピストンロッド18の直径を16mmとし、ピストン16のストロークを50mmとした。
図3に示す実施例2に係る流体圧シリンダ10bを作製した。すなわち、この実施例2に係る流体圧シリンダ10bは、グリース収容溝56を削除したこと以外は、実施例1と同様に作製した。
図4に示す実施例3に係る流体圧シリンダ10cを作製した。この実施例3に係る流体圧シリンダ10cでは、ピストンロッド18及びロッドカバー22の構成材料、DLC皮膜42及びアルマイト皮膜58の膜厚、ピストンロッド18の直径及びピストン16のストロークを実施例1と同様に設定した。また、この実施例3に係るロッドカバー22の軸線方向に沿った長さ寸法をLaよりも長いLbとした。また、ロッドパッキン52よりもピストン16側にグリース収容溝56が形成されている。
ピストンロッド18を炭素鋼(S45C:JIS規格)で構成し、ピストンロッド18の外周面に硬質クロム皮膜102を8μmの膜厚で成膜した以外は、実施例2と同様にして、比較例1に係る流体圧シリンダ100aを作製した(図3参照)。
図5に示す比較例2に係る流体圧シリンダ100bを作製した。この比較例2に係る流体圧シリンダ100bでは、実施例3に係るグリース収容溝56に代えて鉛青銅製のブッシュ104が配設されるブッシュ配設溝106を形成した。また、ピストンロッド18及び硬質クロム皮膜102を比較例1と同じものとし、それ以外は、実施例3と同様に作製した。
(重量測定)
実施例1、実施例3、比較例1、及び比較例2に係る流体圧シリンダ10a、10c、100a、100bの重量を測定した。
実施例1、実施例2、及び比較例1の流体圧シリンダ10a、10b、100aにおいて、ピストン駆動回数に対する最低作動圧力を測定した。また、ピストン16を1000万回駆動した後における実施例1、実施例2、及び比較例1のアルマイト皮膜58の最大摩耗深さを株式会社東京精密製の真円度測定機(ACCRETECH RONDCOM60A)を用いて測定した。なお、測定条件は、真円度評価:最大内接円中心法(MIC)、フィルタ種別:2RC、測定方法:半自動測定、測定速度:5mm/s、姿勢:垂直とした。
重量測定結果を下記表2に示し、寿命測定結果を図6及び図7に示す。
Claims (4)
- シリンダ孔(32)が形成されたシリンダ本体(14)と、
前記シリンダ孔(32)に配設されて作動流体の作用下に軸線方向に沿って変位するピストン(16)と、
前記ピストン(16)に連結されたピストンロッド(18)と、
前記ピストンロッド(18)が挿通するロッド挿通孔(20)が形成されたロッドカバー(22)と、を備えた流体圧シリンダ(10、10a~10c)において、
前記ピストンロッド(18)及び前記ロッドカバー(22)は、アルミニウム又はアルミニウム合金で構成され、
前記ロッド挿通孔(20)を構成する前記ロッドカバー(22)の内壁面の少なくとも一部には、アルマイト皮膜(58)又はダイヤモンドライクカーボン皮膜(42)が形成され、
前記ピストンロッド(18)の外壁面には、前記ロッドカバー(22)の前記内壁面に前記アルマイト皮膜(58)が形成されている場合に当該アルマイト皮膜(58)に摺接するダイヤモンドライクカーボン皮膜(42)が形成され、前記ロッドカバー(22)の前記内壁面に前記ダイヤモンドライクカーボン皮膜(42)が形成されている場合に当該ダイヤモンドライクカーボン皮膜(42)に摺接するアルマイト皮膜(58)が形成されている、ことを特徴とする流体圧シリンダ(10、10a~10c)。 - 請求項1記載の流体圧シリンダ(10、10a~10c)において、
前記ロッドカバー(22)の前記内壁面には前記アルマイト皮膜(58)が形成され、
前記ピストンロッド(18)の外壁面には、前記アルマイト皮膜(58)に摺接する前記ダイヤモンドライクカーボン皮膜(42)が形成されている、ことを特徴とする流体圧シリンダ(10、10a~10c)。 - 請求項1記載の流体圧シリンダ(10、10a、10c)において、
前記ロッドカバー(22)の前記内壁面には、潤滑剤が収容される収容溝(56)が形成されていることを特徴とする流体圧シリンダ(10、10a、10c)。 - 請求項2記載の流体圧シリンダ(10、10a、10c)において、
前記ロッドカバー(22)の前記内壁面には、潤滑剤が収容される収容溝(56)が形成されていることを特徴とする流体圧シリンダ(10、10a、10c)。
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RU2017107872A RU2668300C2 (ru) | 2014-09-12 | 2015-08-24 | Гидравлический цилиндр |
MX2017002857A MX2017002857A (es) | 2014-09-12 | 2015-08-24 | Cilindro hidraulico. |
US15/509,651 US10480546B2 (en) | 2014-09-12 | 2015-08-24 | Hydraulic cylinder |
BR112017004751-9A BR112017004751B1 (pt) | 2014-09-12 | 2015-08-24 | Cilindro de pressão de fluido |
EP15840283.4A EP3193025B1 (en) | 2014-09-12 | 2015-08-24 | Hydraulic cylinder |
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WO2018018149A1 (en) * | 2016-07-29 | 2018-02-01 | Industries Mailhot Inc. | A cylinder piston rod and method of fabrication thereof |
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US10480546B2 (en) | 2019-11-19 |
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