END PLAY MEASUREMENT APPARATUS

• US 20160146701A1
• Filed: 06/13/2013
• Published: 05/26/2016
• Est. Priority Date: 06/13/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Hashimoto, Michinori, Maeda, Shinsaku, Terasawa, Hideo
• Granted Patent: US 9,791,349 B2
• Time in Patent Office: Days
• CPC Class Codes: B61C 9/50 in bogies
• CPC Class Codes: F16C 19/364 with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
• CPC Class Codes: F16C 19/52 with devices affected by abnormal or undesired conditions
• CPC Class Codes: F16C 19/547 with two angular contact rolling bearings
• CPC Class Codes: F16C 19/548 in O-arrangement
• CPC Class Codes: F16C 2229/00 Setting preload
• CPC Class Codes: F16C 2326/10 Railway vehicles in general B61
• CPC Class Codes: F16C 2361/61 Toothed gear systems, e.g. support of pinion shafts in general F16H57/02
• CPC Class Codes: F16C 25/06 Ball or roller bearings
• CPC Class Codes: F16H 2057/0221 Axial adjustment
• CPC Class Codes: F16H 57/022 Adjustment of gear shafts or bearings for compensating misalignment of axes of toothed gearings without orbital motion F16H1/26; for compensating misalignment of axes of planetary gears F16H1/48
• CPC Class Codes: G01B 21/16 for measuring distance of clearance between spaced objects
• CPC Class Codes: G01B 5/146 measuring play on bearings
• CPC Class Codes: G01M 13/04 Bearings

Abstract

An end play measurement apparatus is provided that measures end play of a tapered roller bearing of a gear unit. The gear unit supports a large-gear shaft, with which a gear is fitted, via the tapered roller bearing. The end play measurement apparatus includes a power generation unit, which is fixed to the large-gear shaft and generates power to move the gear unit backward and forward in the axial direction, a position change unit, which is interposed between the power generation unit and the gear unit and changes the axial position of the gear unit by using the power of the power generation unit, and a booster mechanism, which has a free end that receives the power of the power generation unit to boost the power.

Claims

1. An end play measurement apparatus that measures end play of a tapered roller bearing of a gear unit that supports a rotation shaft via the tapered roller bearing, the rotation shaft being fitted with a gear, the apparatus comprising:

a power generation unit that is fixed to the rotation shaft and generates power to move the gear unit backward and forward in an axial direction; and

a position change unit that is interposed between the power generation unit and the gear unit and changes an axial position of the gear unit by using the power of the power generation unit,

wherein the position change unit comprises a booster mechanism that is positioned so as to be astride the rotation shaft and is formed into a substantially U-shape having ends that are coupled to the power generation unit and a free end that receives power of the power generation unit to boost the power and transmit the resultant power to the gear unit.

2. (canceled)

3. An end play measurement apparatus that measures end play of a tapered roller bearing of a gear unit that supports a rotation shaft via the tapered roller bearing, the rotation shaft being fitted with a gear, the apparatus comprising:

a power generation unit that is fixed to the rotation shaft and generates power to move the gear unit backward and forward in an axial direction; and

a position change unit that is interposed between the power generation unit and the gear unit and changes an axial position of the gear unit by using the power of the power generation unit,

wherein the position change unit comprises;

a booster mechanism that is positioned so as to be astride the rotation shaft and is formed into a substantially U-shape having ends that are coupled to the power generation unit and a free end that receives power of the power generation unit to boost the power; and

a power transmission mechanism that comprises an annular assembly and a plurality of rods and transmits a force boosted by the booster mechanism to the gear unit, the annular assembly comprising a plurality of members that are arranged such that the rotation shaft is interposed between the members and that are coupled to each other in a circumferential direction, the rods each having an end that is connected to the annular assembly and the other end that is fixed to the gear unit, wherein

the booster mechanism comprises rollers that sandwich the power transmission mechanism in such a manner that the power transmission mechanism is able to rotate in the circumferential direction.

4. (canceled)