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US20130031795A1 - Rod End Wear Detection Device - Google Patents

Rod End Wear Detection Device Download PDF

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Publication number
US20130031795A1
US20130031795A1 US13/561,003 US201213561003A US2013031795A1 US 20130031795 A1 US20130031795 A1 US 20130031795A1 US 201213561003 A US201213561003 A US 201213561003A US 2013031795 A1 US2013031795 A1 US 2013031795A1
Authority
US
United States
Prior art keywords
bearing
axial
rod end
radial
wear
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.)
Abandoned
Application number
US13/561,003
Other languages
English (en)
Inventor
Shane Lovett
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US13/561,003 priority Critical patent/US20130031795A1/en
Priority to EP12780294.0A priority patent/EP2739952B1/fr
Priority to PCT/IB2012/055274 priority patent/WO2013018078A2/fr
Priority to US14/236,870 priority patent/US9482270B2/en
Publication of US20130031795A1 publication Critical patent/US20130031795A1/en
Abandoned legal-status Critical Current

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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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
    • F16C17/246—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety related to wear, e.g. sensors for measuring wear
    • 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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04—Connecting-rod bearings; Attachments thereof
    • F16C9/06—Arrangements for adjusting play in bearings, operating either automatically or not
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • 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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04—Connecting-rod bearings; Attachments thereof

Definitions

  • the Rod End Wear Detection Device is a fully portable, light weight apparatus designed for the measurement of bearing wear in two axes, including but not limited to, measurement of rod end bearing wear in both the radial and axial directions.
  • REWDD is capable of taking measurements to one one-thousandths of an inch without the need to reorient or permanently modify the subject bearing.
  • a rod end bearing also known as a heim joint or rose joint, is a mechanical articulating joint. Such joints are used on the ends of control rods, steering links, tie rods, or anywhere a precision articulating joint is required. In certain applications, such as aircraft, the rod end bearings must be monitored for signs of fatigue, wear or damage where failure of the equipment can have catastrophic consequences. Wear-indicating rod ends have been trialed in the past (document USAAMRDL-TR-76-14 Kaman Aerospace Corporation, Old Windsor Road, Bloomfield, Conn. 06002).
  • a measuring pin is permanently trapped in a bushing which is welded in place in the bearing outer race. The pin is restricted from moving outward by a shoulder which contacts the welded bushing and from moving inward by contact with the spherical ball.
  • the inner surface of the pin coincides with the inner surface of the bearing liner.
  • the pin will be worn the same amount as the bearing liner.
  • the top of the pin protrudes above the adjacent outer surface of the rod end bearing.
  • the long axis of the pin coincides with the long axis of the rod end bearing, which is the axis of applied load and greatest wear.
  • the ball is loaded into intimate contact with its spherical seat on the side toward the pin.
  • the protruding portion of the pin is machined off until the pin height above the adjacent surface is equal to or slightly less than the allowable internal clearance.
  • Prior inventions Apparatus for Measuring Wear of Rod End Bearings (U.S. Pat. No. 3,845,735) and Wear Measuring Arrangement for Bearings (U.S. Pat. No. 4,509,364) also describe apparatus for the measurement of bearing wear.
  • none of the aforementioned inventions are capable of providing wear measurement in both the axial and radial directions without permanent modification to the rod end.
  • none of the prior inventions are able to provide accurate wear measurement without the requirement to permanently modify the subject bearing.
  • the disclosed apparatus is light weight, portable and requires no modification to the bearing to provide accurate measurements of wear in two axis.
  • a potential patent classification for REWDD is Class 73 (Measuring and Testing), Subclass 7 (By Abrasion, Milling, Rubbing, or Scuffing).
  • Class 73 includes processes and devices designed for measurement or testing of any kind.
  • Subclass 7 includes those processes and devices designed for wear tests.
  • the Rod End Wear Detection Device is an apparatus designed for the measurement of bearing wear in two axes, including but not limited to, measurement of rod end bearing wear in both the radial and axial directions.
  • the inner element of bearing is placed on an expanding mandrel and the external element clamped to hold the bearing perpendicular to the expanding mandrel, which is then secured to the internal indicator plate such that the relative movement between the fixed and moving elements of the bearing may then be measured.
  • An eccentric cam is utilized to operate the movement of a plate within the devise in either the axial or radial direction.
  • the plate transfers the motion of the bearings free play to an indicator displaying the relative movement between internal and external elements of the bearing.
  • FIG. 1 shows a general view of the invention indicating the following parts—(A) the body, (B) the expanding mandrel, a vee clamp arrangement (C) with protective insert (D), the axial actuator (E), the axial axis lock (F), the indicator (G), the indicator guard (H), the radial axis lock (I) and the radial actuator (J).
  • FIG. 2 shows a general view of the invention from the opposite side and indicates the following parts—(G) indicator, (H) indicator guard, (I) radial axis lock and (J) radial actuator.
  • FIG. 3 shows a general view of the invention with an alternative flat clamp (K) and associated protective insert (L).
  • FIG. 4 shows one view of the indicator plate—(M) the indicator interface, (N) the radial actuator receptacle, and (O) the radial lock receptacle.
  • FIG. 5 shows the opposite side of the indicator plate—(M) the indicator interface, (P) the axial actuator receptacle and (Q) axial lock receptacle.
  • the Rod End Wear Detection Device is an apparatus designed for the measurement of bearing wear in two axes, including but not limited to, measurement of rod end bearing wear in both the radial and axial directions.
  • a rod end bearing is a mechanical articulating joint used where a precision articulating joint is required, such as the ends of control rods, steering links, or tie rods. In certain applications, such as aircraft, the rod end bearings must be monitored for signs of fatigue, wear or damage where failure of the equipment can have catastrophic consequences.
  • the objectives of the invention are (1) the quantifiable detection of wear in a rod end or rolling element bearing, (2) the wear to be detected in a bearing in two orthogonal orientations, (3) the ability to quantifiably detect wear in a bearing in two directions without a requirement to permanently modify the bearing, (4) the ability to quantifiably detect wear in a bearing in two directions without a requirement to reorient the rod end, (5) to allow such quantifiable wear in both the axial and radial direction to be measured using a single indicator and (6) allow the use of the device on any rod end or rolling element bearing.
  • the disclosed apparatus allows measurements of wear in bearings to within one one-thousandth of an inch to be taken in the radial and axial directions.
  • the apparatus When employed for the measurement of rod ends, the apparatus is capable of taking measurements in confined spaces, without the requirement to completely remove the link from its installed position and without the need to reorient the rod end to facilitate both axial and radial measurements.
  • a user may ascertain the serviceability of a rod end by detecting the level of wear in the rod end bearing allowing timely replacement and/or repair.
  • the rod end bearing is placed on an expanding mandrel and the rod end shaft clamped using an appropriate clamping arrangement, including but not limited to a vee clamp or a flat clamp.
  • the jaws of the clamping device are manufactured from engineering grade nylon or other appropriate material to alleviate any potential damage to the component being inspected. This also allows for interchangeability of the jaws providing suitable height adjustment for varying rod end designs and offsets.
  • Clamping the bearing in the foregoing manner causes the bearing to be held perpendicular to the expanding mandrel.
  • the mandrel is then expanded into the bore of the bearing thus locking both the internal and external elements of the bearing.
  • the expanding mandrel is then secured to the internal indicator plate such that the relative movement between the fixed and moving elements of the bearing may then be measured.
  • Individual axis locks may then be released allowing relative motion between the internal and external elements of the bearing in a controlled manner by use of the appropriate actuator.
  • Said actuators consist of an eccentric cam retained within the internal workings of the devise. These cams operate the movement of a plate within the devise in either the axial or radial direction.
  • the plate transfers the motion of the bearings free play to an indicator (or transducer and digital display) displaying the relative movement between internal and external elements of the bearing.
  • the design of the plate is such that both axial and radial motions are transmitted to the indicator by the use of a precision machined angle on the plate and a corresponding contact on the indicator. Thus both axial and radial clearances of the subject bearing are able to be precisely measured without the need of additional indicators.
  • the configuration of the actuators and axis locks may also be adapted to suit specific needs. For example moving the locks and actuators from left to right or radial and axial moved from front to back.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Sliding-Contact Bearings (AREA)
US13/561,003 2011-08-02 2012-07-28 Rod End Wear Detection Device Abandoned US20130031795A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US13/561,003 US20130031795A1 (en) 2011-08-02 2012-07-28 Rod End Wear Detection Device
EP12780294.0A EP2739952B1 (fr) 2011-08-02 2012-10-02 Dispositif de détection d'usure de roulement
PCT/IB2012/055274 WO2013018078A2 (fr) 2011-08-02 2012-10-02 Dispositif de détection d'usure de roulement
US14/236,870 US9482270B2 (en) 2011-08-02 2012-10-02 Bearing wear detection device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161574367P 2011-08-02 2011-08-02
US13/561,003 US20130031795A1 (en) 2011-08-02 2012-07-28 Rod End Wear Detection Device

Publications (1)

Publication Number Publication Date
US20130031795A1 true US20130031795A1 (en) 2013-02-07

Family

ID=47626013

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/561,003 Abandoned US20130031795A1 (en) 2011-08-02 2012-07-28 Rod End Wear Detection Device
US14/236,870 Expired - Fee Related US9482270B2 (en) 2011-08-02 2012-10-02 Bearing wear detection device

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/236,870 Expired - Fee Related US9482270B2 (en) 2011-08-02 2012-10-02 Bearing wear detection device

Country Status (3)

Country Link
US (2) US20130031795A1 (fr)
EP (1) EP2739952B1 (fr)
WO (1) WO2013018078A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140190394A1 (en) * 2011-08-02 2014-07-10 Shane Lovett Bearing wear detection device
US20160371768A1 (en) * 2015-06-17 2016-12-22 Facebook, Inc. Configuring a Virtual Store Based on Information Associated with a User by an Online System
US10338335B2 (en) 2016-11-16 2019-07-02 Corning Research & Development Corporation Mid-span clamp for aerial fiber optical cable system
CN112403998A (zh) * 2020-11-02 2021-02-26 安徽天富泵阀有限公司 一种机械制造系统用轴承磨损程度检测维护装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103674713A (zh) * 2013-12-17 2014-03-26 江苏希西维轴承有限公司 一种检测杆端轴承焊接强度的装置
GB2562489B (en) * 2017-05-16 2022-06-22 Skf Aerospace France Method of determining wear in a bearing surface
CN113758711B (zh) * 2021-11-09 2022-05-13 苏州开密科智能装备科技有限公司 一种设备运行用的轴承振动检测设备

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897116A (en) * 1971-10-07 1975-07-29 Crane Co Bearing wear detector
US3845735A (en) 1973-06-22 1974-11-05 Kaman Aerospace Corp Apparatus for measuring wear of rod end bearings
US4063786A (en) * 1976-12-09 1977-12-20 Westinghouse Electric Corporation Self-lubricating auxiliary bearing with a main bearing failure indicator
US4576499A (en) * 1981-04-06 1986-03-18 O & S Manufacturing Company Ball and socket joints with wear indicator
DE8210726U1 (de) 1982-04-16 1982-08-12 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Verschleißmeßvorrichtung für Lager
US4749299A (en) * 1987-05-26 1988-06-07 Dana Corporation Unitary compression member and wear indicator for a ball joint
US5198763A (en) * 1990-02-20 1993-03-30 Nikkiso Co., Ltd. Apparatus for monitoring the axial and radial wear on a bearing of a rotary shaft
JPH0545235U (ja) * 1991-11-14 1993-06-18 株式会社ユニシアジエツクス 軸受の異常検出装置
WO2000055477A1 (fr) * 1999-03-16 2000-09-21 Senior Roy F Jr Dispositif et procede permettant de detecter la surchauffe des paliers dans les systemes de turbopompes
US6617731B1 (en) * 2002-06-05 2003-09-09 Buffalo Pumps, Inc. Rotary pump with bearing wear indicator
US8230718B2 (en) 2007-12-21 2012-07-31 Walin Tool, LLC Apparatus and method for detecting wear in rotor pitch link bearings
US20130031795A1 (en) * 2011-08-02 2013-02-07 Shane Lovett Rod End Wear Detection Device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140190394A1 (en) * 2011-08-02 2014-07-10 Shane Lovett Bearing wear detection device
US9482270B2 (en) * 2011-08-02 2016-11-01 Shane Lovett Bearing wear detection device
US20160371768A1 (en) * 2015-06-17 2016-12-22 Facebook, Inc. Configuring a Virtual Store Based on Information Associated with a User by an Online System
US10338335B2 (en) 2016-11-16 2019-07-02 Corning Research & Development Corporation Mid-span clamp for aerial fiber optical cable system
CN112403998A (zh) * 2020-11-02 2021-02-26 安徽天富泵阀有限公司 一种机械制造系统用轴承磨损程度检测维护装置

Also Published As

Publication number Publication date
EP2739952A2 (fr) 2014-06-11
US9482270B2 (en) 2016-11-01
WO2013018078A3 (fr) 2013-04-11
US20140190394A1 (en) 2014-07-10
WO2013018078A2 (fr) 2013-02-07
EP2739952B1 (fr) 2015-11-18

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STCB Information on status: application discontinuation

Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION