Gear case

• US 4,470,324 A
• Filed: 10/19/1981
• Issued: 09/11/1984
• Est. Priority Date: 10/19/1981
• Status: Expired due to Term

• Current Assignee: Carol Ann; Winona, Mn. Mackay, Helen Lou Winona, Mn. Kurtz
• Original Assignee: Carol A. Mackay, Helen L. Kurtz
• Inventors: Renk, Richard J., Boller, George E.
• Primary Examiner(s): Dorner, Kenneth
• Assistant Examiner(s): McKenzie, Frank
• Application Number:
  US06/312,534
• Time in Patent Office: 1,058 Days
• Field of Search: 74/467, 74/606 R, 74/609, 277/67, 277/152, 277/153, 277/184, 277/53, 384/103, 384/403
• US Class Current: 74/606.00R
• CPC Class Codes: F16H 57/0423 Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes means for guiding lubricant into an axial channel of a shaft F16H57/0426; lubrication by injection, injection nozzles or tubes therefore F16H57/0456
• CPC Class Codes: Y10T 74/19991 Lubrication
• CPC Class Codes: Y10T 74/2186 Gear casings

Abstract

A lubricant retaining device for use with a gear case having a pair of matable sections with a shaft receiving opening therein. The lubricant retaining device extends inwardly to the interior of said case to reduce lubricant flow through the shaft receiving opening.

Claims

1. A lubricant retaining device for a gear case having a series of sides adapted to contain a lubricant and a gear which gives off a lubricant spray pattern while moving, and wherein said case has an opening in a side thereof with a shaft area extending into proximity to said opening so as to be in association with said gear, and wherein said case has a holding means, said device comprising,

locating means carried by said device for engagement with said holding means for aligning said device with respect to said opening in said gear case, and

collecting means extending from said device adapted to project inwardly and generally arcuately to the inside of said gear case to gather lubricant within said case and restrict its flow through said opening, said means being positioned to extend in the path of said lubricant spray pattern toward said shaft area,

said collecting means being deflectable toward a side of said case and between said gear and said case as said case is slid past said gear and wherein said collecting means has resilient memory characteristics which cause it to return to its original free position after it passes said gear.

2. A lubricant retaining device as claimed in claim 1 wherein said slot of said holding means is formed by a channel which extends substantially along said opening and opens toward said shaft area, and said locating means of said device has a leg which is adapted to nest in said channel.

3. A lubricant retaining device as claimed in claim 2 wherein said channel holding means is defined on one side by an inner wall, and said device has an outer leg and an inner leg which between them define a groove which faces radially away from said shaft with said legs being adapted to straddle said inner wall of said channel.

4. A lubricant retaining device as claimed in claim 3 wherein said collecting means extends inwardly from a point adjacent an inner leg of said device.

5. A lubricant retaining device as claimed in claim 3 wherein means are provided on said device which bridge between said outer leg and said inner leg and cooperate with said gear case to prevent rotation of said device when said shaft area and gear rotate.

6. A lubricant retaining device as claimed in claim 1 wherein said gear is spaced from a side of said gear case to provide operating clearance therebetween and wherein said collecting means is relatively thinner than the operating clearance between a side of said gear case and said gear.

7. A lubricant retaining device as claimed in claim 1 wherein said collecting means includes a number of individual leaves.

8. A lubricant retaining device as claimed in claim 7 wherein adjacent leaves are in overlapping relation with respect to one another.

9. A lubricant retaining device as claimed in claim 8 wherein said leaves overlap one another in shingle-like fashion and may deflect relative to one another.

10. A lubricant retaining device as claimed in claim 1 wherein said device includes a base, an outer leg connected to said base and adapted to extend into said holding means carried by said gear case, an inner leg connected to said base and adapted to extend generally to the inside of said case, and wherein said collecting means is connected to said inner leg and projects inwardly toward said gear.

11. A lubricant retaining device as claimed in claim 1 wherein a lip extends radially inwardly from said device toward said shaft area.

12. A lubricant retaining device as claimed in claim 1 wherein said device includes a least a pair of sections and each section extends only a partial distance adjacent said opening in said gear case.

13. A lubricant retaining device as claimed in claim 12 wherein each of said sections extends approximately 180°

.

14. A lubricant retaining device as claimed in claim 1 wherein means are provided to aid in holding said collecting means toward a side of said case before said case is installed over said gear.

15. A device as claimed in claim 1 wherein said locating means has an arcuately extending base and said base has a spacer projection which overlies a portion of the shaft area.

16. A lubricant retaining device for a gear case having a series of sides adapted to contain a lubricant and a gear which gives off a lubricant spray pattern while moving, and wherein said case has an opening in a side thereof with a shaft area extending into proximity to said opening so as to be in association with said gear, and wherein said case has a holding means, said device comprising,

locating means carried by said device for engagement with said holding means for aligning said device with respect to said opening in said gear case, and

collecting means extending from said device adapted to project inwardly and generally arcuately to the inside of said gear case to gather lubricant within said case and restrict its flow through said opening, said means being positioned to extend in the path of said lubricant spray pattern toward said shaft area,

said collecting means having an axially extending wall overhanging and somewhat facing said shaft area and the axis of rotation of said shaft, and wherein said wall tapers radially outwardly to a larger diameter in the nature of a truncated cone as it projects inwardly from a point adjacent a side of said case.

17. A lubricant retaining device for a gear case having a series of sides adapted to contain a lubricant, said case including matable members having edges which abut one another along a split-line to provide an enclosure, said case members having a complimentary pair of side walls with aligned oppositely facing recesses along adjacent edges which form a shaft surface receiving opening when said sections are assembled together, said case being adapted to enclose a gear which gives off a lubricant spray pattern when rotating, and wherein said gear in said case has a rim with a tooth area along the periphery thereof and an arm relatively thinner than said rim extending radially inwardly from said rim to provide an undercut area under said tooth area, and wherein a shaft surface extends through said opening and is rotatable in conjunction with said gear with a spray pattern from said gear being directed toward said shaft surface, said device comprising,

collecting means adapted to extend inwardly from a point adjacent a side of said case and in overhanging relation wih respect to at least a portion of said shaft surface as the latter extends through said opening to the interior of said case, said collecting means being positioned between said shaft surface and said gear tooth area so as to extend in the path of said lubricant spray pattern from said gear toward shaft surface,

said collecting means being deflectable toward a side wall of said case so as to slide between said rim and said side wall as said case and device are moved past said gear and then return to its free position when said case is in its operating position, and

means carried by said device for locating said collecting means relative to said case.

18. A lubricant retaining device as claimed in claim 17 wherein a pair of devices are mounted in a matable member of said gear case with one device adjacent each side of said case and spreader means are provided to hold opposed ends of said devices against their respective sides.

19. A device for a gear case having a series of sides adapted to contain a lubricant, said case having an opening in a side thereof through which a shaft is adapted to extend, said shaft being associated with a gear and a wheel mounted on an axle and having its axis of rotation disposed generally horizontally with said axle, said device including,

collecting means including a web which is adapted to extend in a generally circumferential direction in generally overhanging relation to said shaft and to be spaced from said shaft to allow movement of said shaft relative to said web,

said web extending in an axial direction toward the inside of said gear case and toward said gear and having an underside which faces toward said axis of rotation and said shaft as it extends inwardly toward the inside of said case and away from a side of said gear case,

said web including a pair of ends to enable said device to be inserted in overhanging relation with respect to said shaft without removing said gear or said wheel from said axle, and

locating means secured to said web for attaching said web to said gear case in proximity to said opening in said gear case and generally spaced away from said shaft, said means including a groove defined between spaced apart leg members and shaped to receive and nest with a complimentary portion carried by a gear case side to locate said device relative to said case.