WO2010137194A1 - シュー - Google Patents
シュー Download PDFInfo
- Publication number
- WO2010137194A1 WO2010137194A1 PCT/JP2009/070464 JP2009070464W WO2010137194A1 WO 2010137194 A1 WO2010137194 A1 WO 2010137194A1 JP 2009070464 W JP2009070464 W JP 2009070464W WO 2010137194 A1 WO2010137194 A1 WO 2010137194A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shoe
- spherical
- end surface
- surface portion
- outer peripheral
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 36
- 239000010687 lubricating oil Substances 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 abstract description 58
- 239000003507 refrigerant Substances 0.000 abstract description 16
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000011295 pitch Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
- F04B27/0878—Pistons
- F04B27/0886—Piston shoes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/109—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/0276—Lubrication characterised by the compressor type the pump being of the reciprocating piston type, e.g. oscillating, free-piston compressors
Definitions
- the present invention relates to a shoe, and more particularly to an improvement of a shoe used in a swash plate compressor.
- Patent Documents 1 to 4 Conventionally, a hemispherical shoe used for a swash plate compressor is known, and this hemispherical shoe has a spherical portion sliding with a hemispherical concave portion on the piston side, and an end surface portion sliding with the swash plate.
- Patent Documents 1 to 4 In recent years, swash plate compressors for automobiles have been required to reduce costs and cope with new refrigerants, and in particular, swash plate compressors are required to have high efficiency. Therefore, in Patent Documents 1 to 4, the following improvement proposals for shoes are presented.
- Patent Document 1 the surface roughness of the sliding portion and the non-sliding portion in the spherical surface portion of the hemispherical shoe is made different.
- the spherical surface portion is a stepped tapered surface. It has been proposed to do.
- Patent Document 3 it has been proposed that the outer peripheral edge of the hemispherical shoe is largely removed over the entire circumferential direction to make it a cylindrical shape.
- Patent Document 4 the spherical surface of the hemispherical shoe is proposed. It has been proposed to form a helical oil groove in the part.
- JP 2001-153039 A JP 09-280166 A JP-A-10-220347 Japanese Patent Laid-Open No. 11-050959
- the lubricating oil is also circulated in the refrigerant circulating in the circulation circuit so that the lubricating oil is supplied to the sliding portion between the shoe, the piston and the swash plate. It has become. However, in recent years, there is a tendency to reduce the amount of lubricating oil sealed in the refrigerant circulation circuit, so that sliding portions between the shoe, the piston, and the swash plate are subjected to severe lubrication conditions.
- the present invention provides a spherical portion that slides with the hemispherical concave portion of the first movable member, an end surface portion that slides with the flat surface of the second movable member, and the spherical portion and the end surface portion.
- a shoe having a cylindrical part formed in Grooves and / or recesses are provided on the outer peripheral surface of the cylindrical part, and lubricating oil is held in the grooves and / or recesses.
- the lubricant separated from the refrigerant is held in the oil groove or recess of the shoe when the swash plate compressor is not activated. become. For this reason, when the swash plate compressor is started, even if the lubricant is not mixed in the refrigerant, the lubricant held in the oil groove or the recess is a sliding portion of the spherical surface or end surface of the shoe. Will be supplied. Therefore, it is possible to provide a shoe having good lubricity even when the swash plate compressor is started.
- FIG. 1 is a cross-sectional view showing a main part in a swash plate compressor according to an embodiment of the present invention.
- FIG. 2 is a front view of the shoe shown in FIG. 1. Sectional drawing along the axial direction of the location shown by the arrow III in FIG. The schematic diagram which shows the state of the lubricating oil trapped by the flow of the refrigerant
- the front view of the shoe which shows other examples of the present invention.
- the front view of the shoe which shows other examples of the present invention.
- the front view of the shoe which shows other examples of the present invention.
- FIG. 5-FIG. The front view of the shoe which shows other examples of the present invention.
- the front view of the shoe which shows other examples of the present invention. The front view of the shoe which shows other examples of the present invention.
- the front view of the shoe which shows other examples of the present invention. The front view of the shoe which shows other examples of the present invention.
- the front view of the shoe which shows other examples of the present invention. The front view of the shoe which shows other examples of the present invention.
- FIG. 1 shows the internal structure of a swash plate compressor 1.
- the swash plate compressor 1 has a rotating shaft 2 rotatably supported by a housing (not shown). And a swash plate 3 attached to the rotary shaft 2, a plurality of pistons 4 that move forward and backward in a cylinder bore (not shown) of the housing, and the swash plate 3 that are disposed so as to face the inside of each piston 4 and A plurality of shoes 5 are provided.
- the swash plate 3 is fixed obliquely with respect to the rotating shaft 2 or can change the inclination angle of the swash plate 3, and is sandwiched by two shoes 5 for each piston 4. .
- the flat surface of the swash plate 3 that slides with the shoe 5 is coated with a required sprayed layer, a plating layer, a resin coating, or the like.
- the configuration of the swash plate 3 that can be used in the present invention is not limited to the above, and various conventionally known swash plates can be used.
- the piston 4 has a sliding surface 4a formed of a hemispherical recess so as to face each other, and the shoe 5 swings and slides with respect to the sliding surface 4a while The rotation of the plate 3 is converted into the reciprocating movement of the piston 4.
- Such a configuration of the swash plate compressor 1 is conventionally known, and further detailed description thereof is omitted.
- the shoe 5 of this embodiment includes a spherical surface portion 5 ⁇ / b> A that slides with the sliding surface 4 a of the piston 4, an end surface portion 5 ⁇ / b> B that slides with the flat surface of the swash plate 3, A cylindrical cylindrical portion 5C formed between the spherical surface portion 5A and the end surface portion 5B is provided.
- the shoe 5 of the present embodiment can be manufactured using a sintered material, a resin material, or the like in addition to an iron-based, copper-based, or aluminum-based material.
- a relief portion 5D made of a flat surface that does not come into contact with the sliding surface 4a on the piston 4 side is formed at the top of the spherical surface portion 5A.
- the relief portion 5D is formed between the sliding surface 4a and the relief portion 5D.
- Lubricating oil flows into the space.
- the end surface portion 5B is a sliding surface that slides on the swash plate 3, and its central portion has a medium-high shape that bulges to the swash plate 3 side by about several ⁇ m with respect to the outer peripheral portion. .
- a chamfered portion 5E is formed on the outer peripheral edge of the end surface portion 5B.
- the cylindrical part 5C of the shoe 5 has a cylindrical shape with the same outer diameter in the entire axial direction, and the axial dimension of the cylindrical part 5C is twice the axial length of the spherical part 5A. Is set to a degree.
- the outer peripheral surface of the cylindrical portion 5 ⁇ / b> C that is in a columnar shape does not slide with the swash plate 3 and the sliding surface 4 a of the piston 4.
- a plurality of linear oil grooves 5 ⁇ / b> F are formed on the outer peripheral surface of the cylindrical portion 5.
- the oil grooves 5F are inclined at 45 degrees with respect to the axis C of the shoe 5 and are formed on the outer peripheral surface of the cylindrical portion 5C at an equal pitch in the circumferential direction.
- each oil groove 5F reaches the spherical surface portion 5A, and the other end of each oil groove 5F reaches the chamfered portion 5E, that is, the outer peripheral edge of the end surface portion 5B.
- the cross-sectional shape of the oil groove 5F is a horizontally long rectangle having the same depth and a wide width with respect to the depth.
- the width of the oil groove 5F is preferably 0.01 to 2 mm, and the depth of the oil groove 5F is preferably 0.001 to 1 mm.
- the shoe 5 of the present embodiment has a plurality of oil grooves 5F formed on the outer peripheral surface of the cylindrical portion 5C from the end surface portion 5B to the spherical portion 5A.
- the oil groove 5F is formed on the outer peripheral surface of the cylindrical portion 5C by knurling, turning, etching, or the like.
- the lubricating oil retainability is improved as compared with the above-described conventional shoe, and the lubricity is improved.
- the lubricating oil contained in the refrigerant is The oil enters the 5C oil groove 5F, where it is easily captured and separated from the refrigerant. Therefore, when the swash plate compressor 1 is not activated, that is, when the refrigerant in the circulation circuit is not circulated, the lubricating oil separated from the refrigerant is held in each oil groove 5F. .
- the shoe 5 of the present embodiment is formed with the cylindrical portion 5C, and the shoe 5 itself is lighter than the conventional hemispherical shoe. Therefore, by using the shoe 5 of the present embodiment, it is possible to suppress the occurrence of seizure and abnormal noise in the sliding portion between the shoe 5, the swash plate 3 and the sliding surface 4a, and high durability. It is possible to provide a highly efficient swash plate compressor 1.
- FIGS. 5 to 9 show other embodiments to which the present invention is applied, in which the arrangement direction and shape of the oil groove 5F are changed. That is, the shoe 5 shown in FIG. 5 is formed by inclining the oil groove 5F by 45 degrees with respect to the axis C so that the oil groove 5F is inclined in the direction opposite to that of the first embodiment.
- FIG. 6 shows V-shaped oil grooves 5F formed on the outer peripheral surface of the cylindrical portion 5C at equal pitches in the circumferential direction.
- One end of each V-shaped oil groove 5F reaches the spherical surface portion 5A, and the other end of the oil groove 5F reaches the chamfered portion 5E (the outer peripheral edge of the end surface portion 5B).
- FIG. 7 shows a case where linear oil grooves 5F parallel to the axial direction are formed at an equal pitch on the outer peripheral surface of the cylindrical portion 5C.
- One end of each oil groove 5F reaches the spherical portion 5A, and the other end reaches the chamfered portion 5E (the outer peripheral edge of the end surface portion 5B).
- FIG. 8 shows a spiral oil groove 5F formed on the outer peripheral surface of the cylindrical portion 5C.
- One end of the oil groove 5F reaches the spherical surface portion 5A, and the other end reaches the chamfered portion 5E (the outer peripheral edge of the end surface portion 5B).
- the shoe 5 of each embodiment shown in FIGS. 5 to 8 described above is configured so that the spherical surface portion 5A and the end surface portion 5B, which are sliding portions, communicate with each other via the oil groove 5F. That is, the lubricating oil held in the oil groove 5F is supplied to the spherical surface portion 5A and the end surface portion 5B as in the first embodiment shown in FIG. 2 when the shoe 5 moves.
- one end of the oil groove 5F reaches the spherical surface portion 5A and the other end of the oil groove 5F reaches the end surface portion 5B.
- the other end of the groove 5F may not reach the end surface portion 5B. That is, in this case, one end of the oil groove 5F reaches the spherical surface portion 5A.
- the shoe 5 of the embodiment shown in FIG. 9 is formed by forming annular oil grooves 5F in the direction orthogonal to the axis C at an equal pitch on the outer peripheral surface of the cylindrical portion 5C.
- the cross-sectional shape of the oil groove 5F is the same rectangular cross-sectional shape as in the first embodiment.
- the same operation and effect as the first embodiment of FIG. 2 can be obtained.
- FIG. 10A shows a triangular cross section of the oil groove 5F
- FIG. 10B shows a circular cross section of the oil groove 5F
- 10 (c) to 10 (e) show an embodiment in which adjacent oil grooves 5F are arranged as close as possible.
- FIGS. 11 to 12 show still other embodiments of the present invention.
- a large number of recesses 5G are formed on the outer peripheral surface of the cylindrical portion 5C instead of the oil grooves 5F.
- circular concave portions 5G having the same dimensions are formed in a staggered manner on the outer peripheral surface of the cylindrical portion 5C.
- the square recessed part 5G of the same dimension is formed in the outer peripheral surface of the cylindrical part 5C.
- a large number of triangular or elliptical recesses may be formed on the outer peripheral surface of the cylindrical portion 5C.
- FIGS. 13 to 15 show other embodiments of the present invention, and these embodiments are obtained by changing the shape of the cylindrical portion 5C. That is, in FIG. 13, the cylindrical portion 5C of the shoe 5 is formed in a tapered shape in which the spherical portion 5A side is gradually reduced in diameter compared to the end surface portion 5B side. A plurality of oil grooves 5F similar to those of the first embodiment of FIG. 2 are formed on the outer peripheral surface of the tapered cylindrical portion 5C. Further, FIG. 14 shows that the cylindrical portion 5C of the shoe 5 is formed in a tapered shape whose diameter on the end surface portion 5B side is gradually reduced as compared with the spherical surface portion 5A, and the tapered cylindrical portion 5C.
- FIG. 15 shows a drum-shaped cylindrical portion 5C that bulges radially outward so that the central portion in the axial direction has the maximum outer diameter, and a plurality of linear oil grooves are formed on the outer peripheral surface thereof. 5F is formed.
- one end of the oil groove 5F reaches the spherical surface portion 5A and the other end of the oil groove 5F reaches the end surface portion 5B.
- the other end of the groove 5F may not reach the end surface portion 5B. That is, in this case, one end of the oil groove 5F reaches the spherical surface portion 5A.
- FIG. 16 shows another embodiment of the present invention.
- a flange portion 5H is projected from the outer peripheral edge of the end surface portion 5B.
- a linear oil groove 5F is formed on the outer peripheral surface of the cylindrical portion 5C of the shoe 5 in the same manner as in the first embodiment.
- Other configurations are the same as those of the first embodiment.
- the flange portion 5H may be provided on the outer peripheral edge of the end surface portion 5B in the same manner as in FIG.
- a lattice-like oil groove may be provided on the outer peripheral surface of the cylindrical portion 5C, and the oil groove 5F and the recess 5G may be provided as a cylinder You may attach to the outer peripheral surface of 5 C of shape parts.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
近年、自動車用の斜板式コンプレッサに対して低コスト化や新しい冷媒への対応等が求められており、とりわけ斜板式コンプレッサに対して高効率化が要望されている。
そこで、特許文献1~4において、それぞれ次のようなシューの改良案が提示されている。つまり、特許文献1においては、半球状シューの球面部における摺動部と非摺動部の表面粗さを異ならせてあり、また、特許文献2においては、球面部を段付のテーパ面にすることが提案されている。さらに、特許文献3においては、半球状シューの外周縁を円周方向全域にわたって大きく削除し、そこを円柱状とすることが提案されており、さらに、特許文献4においては、半球状シューの球面部にらせん状等の油溝を形成することが提案されている。
そして特に、斜板式コンプレッサの起動時においては、循環回路の冷媒中に潤滑油が混在していない状態となっているので、冷媒が循環回路内を循環されてもシューとピストンおよび斜板の摺動部分に冷媒を介して潤滑油を十分に供給することができない。そのため、従来では、斜板式コンプレッサの起動時にシューとピストンおよび斜板との摺動部分に焼付きが生じやすくなり、それら摺動部分の異常摩耗により異音や騒音が発生するという問題があった。
上記筒状部の外周面に溝及び/又は凹部を設けて、それら溝及び/又は凹部内に潤滑油を保持させるように構成したものである。
上記斜板3は回転軸2に対して斜めに固定されるか、又は斜板3の傾角を変化させることができるようになっており、各ピストン4ごとに2つのシュー5によって挟持されている。シュー5と摺動する斜板3の平坦面には所要の溶射層、めっき層や樹脂コーティングなどのコーティングが施されている。なお、本件発明に用いることのできる斜板3の構成は上記に限定されることはなく、従来公知の種々の斜板を用いることができる。
上記ピストン4には、相互に向き合うように半球状凹部からなる摺動面4aが形成されており、上記シュー5は、この摺動面4aに対して揺動、かつ摺動しながら、上記斜板3の回転をピストン4の往復移動に変換するようになっている。
このような斜板式コンプレッサ1の構成は従来公知であり、これ以上の詳細な説明は省略する。
上記球面部5Aの頂部には上記ピストン4側の摺動面4aと接触しない平坦面からなる逃がし部5Dが形成されており、これにより、摺動面4aと逃がし部5Dとの間に形成される空間内に潤滑油が流入するようになっている。
上記端面部5Bは上記斜板3と摺動する摺動面となっており、その中央部は外周部に対して僅かに数μm程度、斜板3側に膨出した中高形状となっている。これにより、端面部5Bと斜板3との間に潤滑油が引き込まれ易い構成となっている。また、端面部5Bの外周縁には面取り部5Eが形成されている。
油溝5Fは、シュー5の軸心Cに対して45度傾斜させて、かつ、円周方向に等ピッチで筒状部5Cの外周面に形成されている。各油溝5Fの一端は球面部5Aまで到達させてあり、各油溝5Fの他端は面取り部5E、すなわち端面部5Bの外周縁まで到達させている。
また、油溝5Fの断面形状は、図3に示すように、深さが同一であって、深さに対して幅が広い横長の長方形となっている。この油溝5Fの幅は0.01~2mmが好適であり、油溝5Fの深さは0.001~1mmが好適である。
このように、本実施例のシュー5は、筒状部5Cの外周面に端面部5Bから球面部5Aにわたって複数の油溝5Fが形成されている。本実施例においては、上記油溝5Fは、ローレット加工、旋削加工、エッチング加工等で筒状部5Cの外周面に形成するようにしている。
これについて詳細に説明すると、図4に示すように、潤滑油を含んだ冷媒が筒状部5Cの外周面付近を軸方向に流れる際に、該冷媒中に含まれる潤滑油は、筒状部5Cの各油溝5F内に入り込み、そこで捕捉されて冷媒と分離され易くなっている。
そのため、斜板式コンプレッサ1が起動されていない状態、つまり、循環回路内の冷媒が循環されていない状態では、冷媒から分離された潤滑油は各油溝5F内に保持されるようになっている。そして、斜板式コンプレッサ1が起動される際には冷媒中に潤滑油は混在していないが、予めシュー5の各油溝5F内に潤滑油が保持されているので、シュー5の摺動に伴って摺動部分である球面部5Aと端面部5Bへ各油溝5F内から潤滑油が供給されることになる。つまり、斜板式コンプレッサ1の起動時には、複数の油溝5Fに保持された潤滑油が摺動部分である球面部5Aと端面部5Bに供給されるため、潤滑性が良好なシュー5を提供することができる。しかも、本実施例のシュー5は上記筒状部5Cが形成されて、従来の半球状シューと比較するとシュー5自体が軽量化されている。
したがって、本実施例のシュー5を用いることにより、シュー5と斜板3および摺動面4aとの摺動部分における焼付きや異音の発生を抑制することができ、かつ、耐久性が高く、高効率の斜板式コンプレッサ1を提供することが可能となる。
以上説明した図5~図8に示した各実施例のシュー5は、油溝5Fを介して摺動部分である球面部5Aと端面部5Bとが連通するように構成されている。つまり、油溝5Fに保持された潤滑油は、シュー5が移動する際に、図2に示す第1実施例のものと同様に球面部5Aと端面部5Bへ供給される。
なお、図2~図8に示した各実施例のシュー5においては、油溝5Fの一端を球面部5Aに到達させるとともに油溝5Fの他端を端面部5Bに到達させているが、油溝5Fの他端は端面部5Bに到達させなくても良い。つまり、その場合には、油溝5Fの一端が球面部5Aに到達する構成となる。
このような図5~図9に示した各実施例においても、図2の第1実施例と同様の作用・効果を得ることができる。
また、図12おいては、同一寸法の正方形の凹部5Gを筒状部5Cの外周面に形成したものである。なお、円形や正方形の凹部5Gの代わりに、三角形や楕円形の凹部を筒状部5Cの外周面に多数形成してもよい。
このように筒状部5Cの外周面に多数の凹部5Gを形成したシュー5であっても、上述した第1実施例と同様の作用・効果を得ることができる。
すなわち、図13は、シュー5の筒状部5Cを、球面部5A側が端面部5B側に比べて徐々に縮径されるテーパ状に形成したものである。そして、このようなテーパ状とした筒状部5Cの外周面に図2の第1実施例と同様の複数の油溝5Fが形成されている。
また、図14は、シュー5の筒状部5Cを、端面部5B側が球面部5Aに比べて徐々に縮径されるテーパ状に形成したものであり、そのテーパ状となった筒状部5Cの外周面に直線状の油溝5Fが形成されている。
さらに、図15は、軸方向の中央部が最大外径となるように半径方向外方へ膨出する太鼓形の筒状部5Cとなっており、その外周面に複数の直線状の油溝5Fが形成されている。
このような図13~図15に示した各実施例のシュー5であっても、上記第1実施例と同様の作用・効果を得ることができる。なお、図13~図15の実施例においても、油溝5Fの代わりに図11、図12に示した多数の凹部5Gを筒状部5Cの外周面に形成しても良い。
なお、図13~図15に示した各実施例のシュー5においては、油溝5Fの一端を球面部5Aに到達させるとともに油溝5Fの他端を端面部5Bに到達させているが、油溝5Fの他端は端面部5Bに到達させなくても良い。つまり、その場合には、油溝5Fの一端が球面部5Aに到達する構成となる。
なお、上記図2~図9および図11~図15に示す実施例のシュー5においても、図16と同様に端面部5Bの外周縁にフランジ部5Hを突設しても良い。
4a‥摺動面 5‥シュー
5A‥球面部 5B‥端面部
5C‥筒状部 5F‥油溝
5G‥凹部
Claims (10)
- 第1可動部材の半球状凹部と摺動する球面部と、第2可動部材の平坦面と摺動する端面部と、上記球面部と端面部との間に形成される筒状部とを備えたシューにおいて、
上記筒状部の外周面に溝及び/又は凹部を設けて、それら溝及び/又は凹部内に潤滑油を保持させるように構成したことを特徴とするシュー。 - 上記筒状部は、軸方向全域の外径が同一寸法となる円柱状に形成されていることを特徴とする請求項1に記載のシュー。
- 上記筒状部は、球面部側が端面部側よりも小径となるテーパ状となっていることを特徴とする請求項1に記載のシュー。
- 上記筒状部は、端面部側が球面部側よりも小径となるテーパ状となっていることを特徴とする請求項1に記載のシュー。
- 上記筒状部は、その軸方向の中央部が最大外径となるように半径方向外方に膨出した太鼓形となっていることを特徴とする請求項1に記載のシュー。
- 上記端面部の外周縁に半径方向外方に伸びるフランジ部が形成されていることを特徴とする請求項2~請求項5のいずれかに記載のシュー。
- 上記溝は複数設けられており、各溝の一端は上記球面部に到達することを特徴とする請求項1~請求項6のいずれかに記載のシュー。
- 上記溝は複数設けられており、各溝の一端は上記球面部に到達するとともに各溝の他端は上記端面部に到達しており、上記複数の溝を介して球面部と端面部が連通することを特徴とする請求項1~請求項5のいずれかに記載のシュー。
- 上記溝は、直線状、V字状、または格子状であって、筒状部の外周面に等ピッチで設けられていることを特徴とする請求項7又は請求項8に記載のシュー。
- 上記凹部は複数設けられており、各凹部は、円形、正方形、三角形または楕円形のいずれかであることを特徴とする請求項1~請求項6のいずれかに記載のシュー。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/735,670 US9435327B2 (en) | 2009-05-28 | 2009-12-07 | Shoe |
CN200980109934.6A CN102066753B (zh) | 2009-05-28 | 2009-12-07 | 滑靴 |
BRPI0924062-4A BRPI0924062A2 (ja) | 2009-05-28 | 2009-12-07 | Shoe |
EP09843177.8A EP2290239B1 (en) | 2009-05-28 | 2009-12-07 | Shoe |
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JP2009-129223 | 2009-05-28 | ||
JP2009129223A JP5495622B2 (ja) | 2009-05-28 | 2009-05-28 | シュー |
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WO2010137194A1 true WO2010137194A1 (ja) | 2010-12-02 |
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PCT/JP2009/070464 WO2010137194A1 (ja) | 2009-05-28 | 2009-12-07 | シュー |
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US (1) | US9435327B2 (ja) |
EP (1) | EP2290239B1 (ja) |
JP (1) | JP5495622B2 (ja) |
KR (1) | KR101210839B1 (ja) |
CN (1) | CN102066753B (ja) |
BR (1) | BRPI0924062A2 (ja) |
WO (1) | WO2010137194A1 (ja) |
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JP5731991B2 (ja) * | 2012-01-20 | 2015-06-10 | 大豊工業株式会社 | 摺動部材 |
WO2015056315A1 (ja) * | 2013-10-16 | 2015-04-23 | 株式会社小松製作所 | 摺動部品、摺動部品の製造方法および摺動部品の製造装置 |
JP6331043B2 (ja) * | 2016-03-18 | 2018-05-30 | 博 小曽戸 | 油圧機器用ピストン及び油圧機器 |
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Also Published As
Publication number | Publication date |
---|---|
JP5495622B2 (ja) | 2014-05-21 |
KR101210839B1 (ko) | 2012-12-11 |
KR20110036694A (ko) | 2011-04-08 |
JP2010275927A (ja) | 2010-12-09 |
CN102066753B (zh) | 2014-01-08 |
EP2290239A1 (en) | 2011-03-02 |
EP2290239A4 (en) | 2011-07-27 |
US20110107908A1 (en) | 2011-05-12 |
US9435327B2 (en) | 2016-09-06 |
BRPI0924062A2 (ja) | 2018-09-11 |
CN102066753A (zh) | 2011-05-18 |
EP2290239B1 (en) | 2019-08-21 |
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