Patent US3922792A successfully refreshed from Google Patents.
US3922792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gauging apparatus for workpiece with trochoidal cross section
Assignee: Toyoda Koki KK
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Filing: 1974-02-05
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Granted: 1975-12-02
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Expires: 1994-02-05
Abstract
Abstract A gauging apparatus for measuring the bore of a workpiece, such as for example, a rotor housing for a rotary-piston internal combustion engine, includes a planetary driving mechanism which imparts to the workpiece a predetermined orbital motion whereby the configuration of a trochoid is generated upon the bore of the workpiece and the boundary points between the outer and inner envelopes of the trochoid pass through predetermined fixed positions. A sizing device disposed on a portion of the planetary driving mechanism for movement therewith is provided with a pair of measuring feelers which are engaged with the bore of the workpiece at the positions corresponding to the boundary points, so as to detect the dimensions of the bore in response to the relative displacement thereof during a grinding operation, and to obtain the desired trochoidal form.
Inventors
- 👤 Teruyuki Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:01
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/003; G01B3/00; G01B3/16; G01B3/163; G01B5/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
244 words
In an apparatus for machining a trochoidal bore of a workpiece having inner and outer envelopes and supported on a work spindle and a tool supported on a tool spindle being disposed so as to contact said workpiece at a first point of a plurality of predetermined boundary points disposed between said inner and outer envelopes, the improvements comprising: a basic member; a rotating member rotatably mounted within said basic member; said work spindle being rotatably mounted within said rotating member with a predetermined eccentricity with respect thereto for supporting said workpiece in axial alignment with said work spindle; trochoid generating drive means operatively connected with said rotating member and said work spindle for rotating said rotating member and said work spindle about their own axes with a predetermined rotational ratio therebetween and for revolving said work spindle about the axis of said rotating member, whereby a trochoidal motion is imparted to said work spindle and said workpiece supported thereon and draws the inner and outer envelopes of a trochoidal bore upon rotation of said work spindle by said trochoid generating drive means; and sizing means fixedly disposed on said basic member and being provided with feeler means for detecting the dimensions of said trochoidal bore of said workpiece by engaging said feeler means with said bore at at least a second point of said boundary points disposed between said inner and outer envelopes of said trochoidal bore while said workpiece is being rotated.
Claim 2
Dependent Claim
244 words
In an apparatus for machining a trochoidal bore of a workpiece having inner and outer envelopes and supported on a work spindle and a tool supported on a tool spindle being disposed so as to contact said workpiece at a first point of a plurality of predetermined boundary points disposed between said inner and outer envelopes, the improvements comprising: a basic member; a rotating member rotatably mounted within said basic member; said work spindle being rotatably mounted within said rotating member with a predetermined eccentricity with respect thereto for supporting said workpiece in axial alignment with said work spindle; trochoid generating drive means operatively connected with said rotating member and said work spindle for rotating said rotating member and said work spindle about their own axes with a predetermined rotational ratio therebetween and for revolving said work spindle about the axis of said rotating member, whereby a trochoidal motion is imparted to said work spindle and said workpiece supported thereon and draws the inner and outer envelopes of a trochoidal bore upon rotation of said work spindle by said trochoid generating drive means; and sizing means fixedly disposed on said basic member and being provided with feeler means for detecting the dimensions of said trochoidal bore of said workpiece by engaging said feeler means with said bore at at least a second point of said boundary points disposed between said inner and outer envelopes of said trochoidal bore while said workpiece is being rotated.
Claim 3
Dependent Claim
116 words
Apparatus as set forth in claim 1, wherein said trochoid generating drive means comprises; a drive motor fixedly mounted upon said basic member and operatively connected with said rotating member for rotating the same; coupling means operatively connected with said work spindle and rotatably mounted within the lower portion of said basic member and in axial alignment with said rotating member; gear train means rotatably mounted upon said rotating member and connected with said coupling means and said basic member so as to establish a predetermined relationship between the rotational speeds of said rotating member and said work spindle; and oscillating means connected with said rotating member and said basic member for oscillating said basic member.
Claim 4
Dependent Claim
94 words
Apparatus as set forth in claim 2, wherein said oscillating means comprises: first and second gears rotatably mounted upon said basic member and engaged with each other; a gear integrally connected with said rotating member and operatively engaged with said first gear for rotating said second gear at the same rotational speed as said rotating member; and a guide roller rotatably and eccentrically mounted upon said second gear and slidably received within a guiding groove which is provided upon said bed and extends in a direction perpendicular to the axis of said basic member.
Claim 5
Dependent Claim
94 words
Apparatus as set forth in claim 1, wherein said sizing means comprises: a main body slidably mounted upon a guiding member which is secured to said basic member; a pair of measuring levers, each having a measuring feeler disposed thereon, mounted upon said main body and operable for maintaining said measuring feelers in abutting engagement with the bore of said workpiece at said second and another of said boundary points; actuating means provided for operating said measuring levers; and detecting means including a displacemenT detector for detecting the relative displacement of said measuring feelers.
Claim 6
Dependent Claim
49 words
Apparatus as set forth in claim 4, wherein said actuating means comprises: a control cylinder pivotably connected with one of said measuring levers; and a piston rod integrally formed with a piston slidably received within said cylinder and being pivotably connected with the other one of said measuring levers.
Claim 7
Dependent Claim
24 words
Apparatus as set forth in claim 4, wherein said pair of measuring levers are pivotably connected with each other at a common pivot point.
Claim 8
Dependent Claim
49 words
Apparatus as set forth in claim 6, wherein said detecting means comprises: a differential transformer fixedly secured upon one of said measuring levers and having a detecting rod disposed therewithin; and an abutment member adjustably mounted upon the other of said measuring levers and engaged with said detecting rod.
Claim 9
Dependent Claim
44 words
Apparatus as set forth in claim 1, wherein said feeler means are provided with an arcuate contact surface having a predetermined radius of curvature which will compensate for the difference between a required trochoid curve generated upon said bore and a theoretical trochoid curve.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |