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WO2015150161A1 - Palier à roulement - Google Patents

Palier à roulement Download PDF

Info

Publication number
WO2015150161A1
WO2015150161A1 PCT/EP2015/056223 EP2015056223W WO2015150161A1 WO 2015150161 A1 WO2015150161 A1 WO 2015150161A1 EP 2015056223 W EP2015056223 W EP 2015056223W WO 2015150161 A1 WO2015150161 A1 WO 2015150161A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
lubricant
rolling bearing
molded part
outer ring
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2015/056223
Other languages
German (de)
English (en)
Inventor
Gunther Elfert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
ThyssenKrupp Rothe Erde Germany GmbH
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Rothe Erde GmbH
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 ThyssenKrupp AG, ThyssenKrupp Rothe Erde GmbH filed Critical ThyssenKrupp AG
Priority to CN201590000412.3U priority Critical patent/CN206668764U/zh
Publication of WO2015150161A1 publication Critical patent/WO2015150161A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6648—Retaining the liquid in or near the bearing in a porous or resinous body, e.g. a cage impregnated with the liquid
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3831—Ball cages with hybrid structure, i.e. with parts made of distinct materials
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/44—Selection of substances
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/31—Wind motors

Definitions

  • the present invention relates to a rolling bearing with a arranged between two rolling elements form part, which provides the rolling elements continuously and in metered form lubricant available.
  • bearings are mounted on shafts or axles.
  • Slewing bearings are u.a. used in offshore wind turbines as blade bearings (pitch bearings) for connecting the respective blade root to the rotor hub.
  • blade bearings pitch bearings
  • Such a blade bearing is used to adapt the blade angle of the rotor blades to the respective wind direction and speed, in order to achieve a maximum energy yield of the wind turbine by a precise positioning of the rotor blades.
  • Common designs for blade bearings are single and double row four point bearings with an outer and inner ring. Wind turbine blade bearings are facing ever greater challenges due to increasingly larger rotors and a trend towards frequent pitching. Lubrication and maintenance are therefore important for the reliable operation and long service life of rolling bearings.
  • Some methods for lubricating the contact surfaces of the rolling elements as well as the outer raceway and the inner raceway of the rolling body track are already known from the prior art, such as an elastic rolling element lubricated with a fluid (DE 43 37 466 A1).
  • the fluid used here is preferably an incompressible liquid lubricating oil, so that the danger exists that the lubricating oil exits from the rolling bearing, which has a negative effect on the operating behavior and the life of the rolling bearing and adversely affects the quality of work.
  • the bearing taught in DE 102 59 003 A1 already has an improvement insofar as a solid lubrication is proposed, wherein a solid lubricant rests on one or more support layers of a base body as a layer and is transferred to the friction with another opposing base body on this (see Fig. 4 in DE 102 59 003 A1).
  • the support layers allow a pressure equalization (cf., in DE 102 59 003 A1), ie, axially or radially directed forces acting inside a rolling bearing are unimpaired on the carrier material of the lubricant transfer.
  • the object of the present invention is achieved by a roller bearing having at least one molded part arranged between two rolling elements, the molded part at least partially enclosing rolling surfaces of two adjacent rolling elements, characterized in that the molded part is designed to deposit a lubricant and / or a lubricant Rolling continuously available to provide.
  • the drive device has the advantage that contact surfaces between the rolling elements and the wall of the rolling body track formed by the inner and outer rings are covered to an adequate extent with a sufficiently viable lubricating film. Because only at a friction of a part of the rolling surface of a rolling element, the deposited in the molding lubricant is discharged to this part of the rolling surface of the rolling body. Characterized that the part facing the mold part of the rolling surface of the rolling element constantly changes, a uniform lubricant film is produced on the rolling surface of a rolling body. This counteracts premature wear caused by rolling friction, for example due to tribo-corrosion, as well as premature fatigue of the material of said components.
  • the molded part has at least one concave pronounced surface with which the molded part partially surrounds the rolling surface of at least one of the two adjacent rolling bodies. Due to the fact that the molded part surrounds a rolling element in a form-fitting manner, first of all a lubricant is made available to a rolling element by the shortest route, whereby the functioning of the rolling bearing is improved. By minimizing the distance between the rolling element and the molded part and thus acting adhesion forces, it is achieved that a thin uniform lubricant film is formed between the rolling element and the molded part, which is also free of disturbing air chambers.
  • the quasi-positive coating of the rolling element by the molded part prevents an arbitrary dispersion of the lubricant within the WälzSystemterrorismbahn. An undesirable lumping of lubricant and an adhesion of excessively free set lubricant to the wall formed by the inner and outer ring of the rolling body is prevented preventively.
  • the roller bearing further comprises a cage with recesses for receiving the rolling elements, wherein the shape of the molded part is so pronounced to be arranged on one or both sides of the cage between two recesses of the cage.
  • the rolling bearing has an outer ring and an inner ring arranged concentrically within the outer ring, wherein between a raceway surface on the outer ring and a raceway surface on Inner ring is formed a rolling body track, wherein the rolling elements are arranged in the WälzSystembahn and wherein the molding extends along a transverse direction to WälzSystemterrorismbahn from the raceway surface on the outer ring to the raceway surface on the inner ring.
  • the probability of formation of undesirable air chambers within the rolling element body path can be reduced in a simple manner and at the same time an optimization of the continuous lubricant supply of the contact surfaces which constantly rub inside the rolling element track can be realized.
  • the rolling bearing characterized in that the molded part on its inner ring and / or the outer ring facing surface has at least one wedge-shaped scraping edge, wherein the at least one wedge-shaped scraping edge is adapted to adhere to the inner ring and / or the outer ring Scrape lubricant.
  • the rolling bearing is characterized in that the molded part for transporting the lubricant provided to the rolling elements has channels, which first openings on the inner ring and / or the outer ring facing surface and second openings on the Having the Wälz- bodies facing surface.
  • the rolling bearing is characterized in that provided for the transport of the rolling bodies available Lubricant channels are adapted to allow the transport of the lubricant provided to the rolling bodies in a first direction from the first openings to the second openings and / or in a second direction from the second openings to the first openings.
  • the rolling bearing is characterized in that the molded part consists of a combination of a carrier material and the lubricant, wherein the carrier material is adapted, regardless of a form of aggregate state of the lubricant to bind the lubricant itself and / or at a friction with the respective changing part of rolling surfaces of the rolling elements dosed to provide the lubricant to the rolling elements. Due to the ability of the carrier material to bind the lubricant, contamination of the rolling bearing raceway with superfluous lubricant is advantageously prevented. The likelihood of leakage of the lubricant, particularly a liquid lubricant, such as oil, out of the rolling element raceway is drastically reduced. At the same time, the lubricant is essentially made available only to the rolling elements, so that a once provided to the rolling elements lubricant has a longer life by the needs-based control. This in turn extends the maintenance-free time window of the rolling bearing.
  • the rolling bearing is characterized in that the carrier material has a matrix-like structure, wherein the matrix-like structure is adapted to deposit the lubricant, wherein the lubricant is present in a liquid state of matter, wherein the matrix-like Structure is further adapted to give dosed at a lubricant of the matrix-like structure with the changing part of rolling surfaces of the rolling elements, the lubricant to this respective changing part.
  • the surface of the carrier material for binding the lubricant is advantageously increased, so that the storage capacity of the carrier material for the lubricant is increased. Leakage of lubricant is counteracted even more effective. The likelihood of lubricant leakage from the rolling bearing is even more reduced. The maintenance-free time window of the rolling bearing is increased even more.
  • the rolling bearing is characterized in that the matrix-like structure is further adapted to bind the lubricant at a standstill of the rolling elements.
  • Reversibly bonding lubricant advantageously enhances the effects already described by the increased storage capacity of the carrier material to increase the life of both the lubricant and the rolling bearing at a minimization of maintenance frequency.
  • a rolling bearing in such an embodiment can also be used in a very sensitive external environment of the rolling bearing.
  • the rolling bearing is characterized in that the carrier material is a polymer and / or a polymer graphite.
  • injection molded parts are possible as a carrier material.
  • the rolling bearing characterized in that the polymer consists of polyamide and / or polyoxymethylene and / or polyether retherketone.
  • the carrier has a high strength, rigidity and toughness with good chemical resistance and high wear resistance, low friction, good damping capacity, a pronounced temperature resistance and good sliding properties.
  • the mechanical properties can be further improved, so that, for example, strength and impact resistance can be tailored to the application, while the weight and the manufacturing cost of the substrate can be reduced.
  • the rolling bearing is characterized in that the molded part consists entirely of a solid lubricant.
  • the outer ring and / or the inner ring of the rolling bearing has a closable recess, wherein the rolling bearing is characterized in that the molded part is adapted to be received by the closable recess of the outer ring and / or the inner ring be arranged and arranged therethrough on and / or under the cage between the rolling elements in each case.
  • the moldings may be introduced piece by piece into the rolling element raceway by the conventional 'stuffing plugs' of the rolling element bearings and positioned on and / or under the cage.
  • the rolling bearing is characterized in that the rolling elements are balls and / or cylinders and / or cones.
  • Figure 1 shows a rolling bearing with rolling elements according to the prior art.
  • FIG. 2 shows a section of a cage of the rolling bearing with arranged between two adjacent rolling elements molding according to an exemplary embodiment of the present invention in a perspective view.
  • FIG. 3 shows, in a further embodiment, the installation situation of cage 104, rolling elements 102 and molded part 202a or 202b in a rolling body track 12 with a design of the roller bearing according to the invention as a double four-point bearing 300.
  • FIG. 4 shows a further embodiment of the rolling bearing according to the invention as a multi-row rolling bearing with two parallel arranged rolling element raceways.
  • FIG. 1 shows a rolling bearing 100 is shown in the prior art.
  • a WälzERAckerbahn 1 12 which of an outer ring 106 and an inner ring 108 (not shown here) is formed, there is a freely rotatably arranged cage 104 with recesses 110, in which rolling elements 102 are arranged in a defined distance.
  • FIG. 2 in an exemplary embodiment of the present invention, a section 200 of a cage 104 with two adjacent rolling elements 102, which are placed in the recesses 110, is shown.
  • a molded part 202a is arranged on the cage 104 between two rolling elements 102
  • a shaped part 202 is arranged under the cage 104 between two rolling elements 102.
  • Both mold parts 202a and 202b each have a concave pronounced surface, with which they form-fitting and lip-like enclose the respective rolling elements 102. It is thus possible in an advantageous manner to make the lubricant available to it by the shortest route and in quasi-direct contact with the rolling elements.
  • adhesion forces which cause a uniform lubricant film formed on the rolling elements 102, wherein an undesirable formation of air chambers is simultaneously prevented.
  • the molded part 202a or 202b constantly receives information about whether it should deliver lubricant to the rolling elements 102, should refrain from dispensing lubricant or lubricant back into the Form part 202a or 202b to be bound. Thus, both an excess and a low supply of the rolling elements 102 is prevented with lubricant.
  • the molded part 202a or 202b has a scraping edge 206, which faces the outer ring 106 on the molded part 202a or the inner ring 108 on the molded part 202b, and is adapted to lubricating the outer ring 106 formed wall of the rolling body track 1 12 or adhering to the wall formed by the inner ring 108 of the rolling body track 1 12, scrape at a rotation of the cage 104 and the rolling elements 102 in the rolling body track 1 12.
  • a deposit of excessively deposited lubricant in the rolling body track 1 12 is prevented in an advantageous manner.
  • channels 204 which first openings on the inner ring 108 and / or outer ring 106 facing surface and second openings on the rolling elements 102 facing surface, for example, the excess lubricant from the walls of the rolling body track 1 12 12 are again supplied to the rolling elements or of the molded part 202a or 202b, if it has the ability of a reversible binding of lubricant, be resorbed itself.
  • the molded part 202a or 202b extends in a maximum transverse direction to the running direction of the rolling elements 102 and the WälzEffbahn as space-filling, without interfering with a rolling friction of the rolling elements 102 disturbing.
  • the molded part 202a or 202b again receives feedback as to whether there is an excess or deficiency of supply of inner ring 108 and / or outer ring 106 with lubricant , A need-based lubricant concentration and a uniform lubricant distribution within the rolling body track are thereby achieved in an advantageous manner.
  • the molded part 202a or 202b has a carrier material which receives the lubricant in solid form.
  • the carrier material may be made of a polymer and / or a polymer graphite.
  • the polymer for example, polyamide and / or polyoxymethylene and / or polyetheretherketone can be used.
  • the carrier material can be adapted in its shape to the respective space and has a low wear at high temperature resistance.
  • the carrier material does not absorb axially or radially acting forces, unlike the lubrication concepts disclosed in the prior art using solid lubricants, and thus is not subject to unnecessary pressure exposed.
  • the carrier material thus experiences no undesired deformation, whereby the lubricating ability would be adversely affected.
  • the molded part 202a or 202b is free of a carrier material and is itself completely a solid lubricant.
  • the molded part 202a or 202b is limited only to its lubricating function and does not assume any supporting function.
  • the molded part 202a or 202b has a matrix-like structure which has the ability to deposit a lubricant in a liquid form, for example, oil, dispensed dosed or reversibly resume.
  • a lubricant in a liquid form, for example, oil, dispensed dosed or reversibly resume.
  • the molded part 202a or 202b thus has a self-regulation capability. The lubrication concept disclosed here is thereby effectively supported.
  • FIG. 3 shows, in a further embodiment, the installation situation of the cage 104, the rolling elements 102 and the molded part 202a or 202b in a rolling body track 12 with a design of the roller bearing according to the invention as a double four-point bearing 300. It becomes clear that positioning of the molding 202a or 202b on the cage 104 between the rolling elements 102 no conversion measures or other changes of constructions of conventional rolling bearings is necessary. By using polymer plastics such as polyamide and / or polyoxymethylene and / or polyetheretherketone, shaping of the molded part 202a or 202b adapted to the respective design of the rolling bearing is possible.
  • polymer plastics such as polyamide and / or polyoxymethylene and / or polyetheretherketone
  • the molded part 202a or 202b can be inserted through the conventional Grestopfenbohronne of rolling bearings used today in the WälzEffbahn 112 on or below the cage 104.
  • This has the advantage that previously used bearings are retrofitted with the described molding 202a and 202b respectively.
  • the lubrication concept disclosed here can also be exchanged in previously used rolling bearings as part of a maintenance against the previous lubrication concept. This not only extends the maintenance-free window, but also improves the quality of work and extends the effective life of the bearing.
  • FIG. 4 shows a further embodiment of the roller bearing according to the invention as a multi-layer rolling bearing 400 with two rolling element rolling tracks 1 12 arranged in parallel.
  • Multi-row rolling bearing enhances the positive effects of the improved lubrication concept disclosed herein.
  • the respective number of bearings arranged in parallel should be adapted to the respective requirements of the respective rolling bearing.
  • a use of multi-row rolling bearings and The lubrication concept disclosed here can have a positive synergistic effect for coping with the increased demands. For example, it is envisaged that blade bearings will remain maintenance free after their first installation for the first five years.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne des paliers à roulement comportant des éléments de roulement et une pièce façonnée disposées entre deux éléments de roulement, la pièce façonnée entourant au moins partiellement une partie variable de surfaces de roulement de deux éléments de roulement adjacents en contact glissant constant. La pièce façonnée est adaptée pour déposer un lubrifiant et/ou délivrer un lubrifiant de façon dosée aux éléments de roulement en cas de friction avec leur partie variable respective de surfaces de roulement.
PCT/EP2015/056223 2014-04-01 2015-03-24 Palier à roulement Ceased WO2015150161A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201590000412.3U CN206668764U (zh) 2014-04-01 2015-03-24 滚子轴承

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014104599.8 2014-04-01
DE102014104599.8A DE102014104599B8 (de) 2014-04-01 2014-04-01 Wälzlager

Publications (1)

Publication Number Publication Date
WO2015150161A1 true WO2015150161A1 (fr) 2015-10-08

Family

ID=52706189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/056223 Ceased WO2015150161A1 (fr) 2014-04-01 2015-03-24 Palier à roulement

Country Status (3)

Country Link
CN (1) CN206668764U (fr)
DE (1) DE102014104599B8 (fr)
WO (1) WO2015150161A1 (fr)

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DE202018102121U1 (de) * 2018-04-17 2019-07-19 Liebherr-Components Biberach Gmbh Großwälzlager
DE102018120593A1 (de) * 2018-08-23 2020-02-27 Schaeffler Technologies AG & Co. KG Käfig für Axiallager sowie Klimakompressor mit dem Axiallager
DE102019200645A1 (de) * 2019-01-18 2020-07-23 Aktiebolaget Skf Hochpräzisionsgetriebe
CN116066471B (zh) * 2023-04-06 2023-06-16 索特传动设备有限公司 隔离件、回转支承及作业机械

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US644245A (en) * 1898-08-03 1900-02-27 Charles Fowler Ball-bearing.
US851019A (en) * 1906-07-17 1907-04-23 Johann Michael Model Cage-ring for ball-bearings.
DE2840413A1 (de) * 1977-09-22 1979-03-29 Skf Kugellagerfabriken Gmbh Waelzkoerperkaefig
EP1088173A1 (fr) * 1998-06-15 2001-04-04 SKF Engineering & Research Centre B.V. Systeme de lubrification
EP1225354A1 (fr) * 2001-01-23 2002-07-24 Koyo Seiko Co., Ltd. Composition de lubrifiant polymère solide et palier à roulement garni de lubrifiant polymère
EP1710457A2 (fr) * 2005-04-07 2006-10-11 Schaeffler KG palier à roulement linéaire avec une cage sous forme d'une chaîne muni de poches de graissage
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US10305770B2 (en) 2014-02-05 2019-05-28 Apple Inc. Uniform communication protocols for communication between controllers and accessories
US11283703B2 (en) 2014-02-05 2022-03-22 Apple Inc. Uniform communication protocols for communication between controllers and accessories

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DE102014104599B4 (de) 2018-04-26
DE102014104599A1 (de) 2015-10-01
CN206668764U (zh) 2017-11-24
DE102014104599B8 (de) 2019-01-17

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