EP0148639A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Lubrication arrangement in change-speed gearing assembly
Assignee: Toyota Motor Corp
•
Filing: 1984-12-27
•
Granted: —
•
Expires: 2004-12-27
Abstract
Abstract A change-speed gearing assembly including upper and lower bearings (13, 14) carried on a partition wall (11 b) of a casing (11) for the assembly respectively for supporting thereon input and counter shafts (21, 22), and a bearing retainer (12) secured in a fluid-tight manner to the outside face of the partition wall to retain both the bearings in place. The input shaft extends outwardly through an annular seal member (15) carried on the upper portion of the bearing retainer coaxially with the upper bearing. The bearing retainer (12) is formed with upper and lower cavities (12d, 12e) and is formed at one side thereof with a vertical groove (12g) which opens at its upper end into a side portion of the upper cavity located above the lower edge of the seal member and at its lower end into the upper portion of the lower cavity to maintain the level of lubricating oil in the upper cavity above the lower edge of the seal member.
Inventors
- 👤 Keiji Takeshita
- 👤 Hideo Hamano
- 👤 Shoichi Ohshima
- 👤 Takaaki C/O Toyota Jidosha Kabushiki K. Suzuki
- 👤 Shuichiro C/O Toyota Jidosha Kabushiki Kaisha Ida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 03:13
CPC Classifications
F; F16; F16N; F16N31/00; F16H; F16H57/00; F16H57/04; F16H57/0467; F16H57/0469; F16H57/0471
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
342 words
A change-speed gearing assembly for a motor vehicle comprising: a casing formed with an upright partition wall; a first bearing carried on the upper portion of said partition wall for rotatably supporting thereon an input shaft of said change-speed gearing assembly, said input shaft being provided thereon with an input gear adjacent the inside face of said partition wall; a second bearing carried on the lower portion of said partition wall for rotatably supporting thereon a countershaft of said change-speed gearing assembly, said countershaft being provided thereon with a counter gear in mesh with said input gear; a bearing retainer secured in a fluid-tight manner to the outside face of said partition wall to retain both said bearings in place, said bearing retainer being formed with upper and lower cavities which cooperate with the respective outside faces of said first and second bearings to form upper and lower lubrication chambers and being further formed with a verical groove which cooperates with the outside face of said partition wall to form a communication passage between said upper and lower lubrication chambers, said bearing retainer having therein an opening coaxial with said first bearing through which said input shaft extends outwardly; and an annular seal member coupled with the opening of said bearing retainer in surrounding relationship with said input shaft to seal said upper lubrication chamber; and in which said partition wall is formed at its upper portion with an axial hole opening at its inner end toward the interior of said casing above said input gear and at its outer end into the upper portion of said upper lubrication chamber; the improvement wherein the bottom portion of said upper lubrication chamber is separated from the upper portion of said lower lubrication chamber, and wherein said vertical groove is arranged at one side of said bearing retainer and'opens at its upper end into a side portion of said upper cavity located above the lower edge of said seal member and at its lower end into the upper portion of said lower lubrication chamber.
Claim 2
Dependent Claim
342 words
A change-speed gearing assembly for a motor vehicle comprising: a casing formed with an upright partition wall; a first bearing carried on the upper portion of said partition wall for rotatably supporting thereon an input shaft of said change-speed gearing assembly, said input shaft being provided thereon with an input gear adjacent the inside face of said partition wall; a second bearing carried on the lower portion of said partition wall for rotatably supporting thereon a countershaft of said change-speed gearing assembly, said countershaft being provided thereon with a counter gear in mesh with said input gear; a bearing retainer secured in a fluid-tight manner to the outside face of said partition wall to retain both said bearings in place, said bearing retainer being formed with upper and lower cavities which cooperate with the respective outside faces of said first and second bearings to form upper and lower lubrication chambers and being further formed with a verical groove which cooperates with the outside face of said partition wall to form a communication passage between said upper and lower lubrication chambers, said bearing retainer having therein an opening coaxial with said first bearing through which said input shaft extends outwardly; and an annular seal member coupled with the opening of said bearing retainer in surrounding relationship with said input shaft to seal said upper lubrication chamber; and in which said partition wall is formed at its upper portion with an axial hole opening at its inner end toward the interior of said casing above said input gear and at its outer end into the upper portion of said upper lubrication chamber; the improvement wherein the bottom portion of said upper lubrication chamber is separated from the upper portion of said lower lubrication chamber, and wherein said vertical groove is arranged at one side of said bearing retainer and'opens at its upper end into a side portion of said upper cavity located above the lower edge of said seal member and at its lower end into the upper portion of said lower lubrication chamber.
Claim 3
Dependent Claim
59 words
A change-speed gearing assembly as claimed in Claim 1, wherein said upper cavity in said bearing retainer is an annular cavity coaxial with said first bearing, and said lower cavity in said bearing retainer is a circular cavity coaxial with said second bearing, the diameter of said upper annular cavity being larger than that of said lower circular cavity.
Claim 4
Dependent Claim
50 words
A change-speed gearing assembly as claimed in Claim 1, wherein said bearing retainer is formed with an inner end face which is fitted to the outside face of said partition wall to separate the bottom portion of said upper lubrication chamber from the upper portion of said lower lubrication chamber.
Claim 5
Dependent Claim
62 words
A change-speed gearing assembly as claimed in Claim 1, wherein said partition wall is formed at its inside face with an oil receiver extends around the lower and side edges of the inner end opening of said axial hole to receive lubricating oil picked up by rotation of said gears and supply it into said upper lubrication chamber through said axial hole.
Claim 6
Dependent Claim
67 words
A change-speed gearing assembly as claimed in Claim 1, wherein said first bearing is in the form of a sealed ball bearing arranged to store an amount of lubricating oil in said upper lubrication chamber, and said second bearing is in the form of a roller bearing arranged to permit a flow of lubricating oil thereacross from said lower lubrication chamber into the interior of said casing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.