US4742725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for applying pre-load to bevel gear device
Assignee: Toyota Motor Corp
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Filing: 1986-07-31
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Granted: 1988-05-10
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Expires: 2006-07-31
Abstract
Abstract In a bevel gear device, wherein bevel gears are provided which are fixed to forward ends of shafts crossing each other, respectively, and in mesh with each other, and a turning force applied to one of the shafts is imparted to the other, at least either one of the shafts is made movable in the axial direction thereof, and a pre-load is applied to the movable shaft in the advancing direction, in which the bevel gears are in mesh with each other, by use of a first force. As a consequence, fluctuations of the backlash are reliably absorbed, necessity of the backlash adjustment is eliminated, and an excessively high pre-load can be prevented from being generated. Furthermore, another pre-load is applied to the movable shaft in the direction reverse to the first force, by use of a second force weaker than the first force. As a consequence, a tooth surface force applied to the bevel gears can be reduced.
Inventors
- 👤 Junichi Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:31
CPC Classifications
B; B62; B62D; B62D1/00; B62D1/02; B62D1/16; B62D1/20; B62D3/00; B62D3/02; F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/14; F16H57/00; F16H57/12; F16H57/02; F16H57/021; F16H57/022; F16H2057/0221; F16H55/00; F16H55/02; F16H55/17; F16H55/18; F16H55/20; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19628; Y10T74/19642; Y10T74/1966; Y10T74/19665
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
A mechanism for applying a pre-load to a bevel gear device, wherein bevel gears are provided which are fixed to forward ends of shafts crossing each other, respectively, and in mesh with each other, and a turning force applied to one of said shafts is imparted to the other, characterized in that: at least either one of said shafts is made movable in the axial direction thereof; and first spring means for applying a first pre-load to said movable shaft in an advancing direction, in which said bevel gears are in mesh with each other, with a first force to bias said movable shaft in the advancing direction and second spring means for applying a second pre-load to said movable shaft in the direction opposite to said first force with a second force weaker than said first force to reduce a tooth surface force between said bevel gears caused by said first force.
Claim 2
Dependent Claim
153 words
A mechanism for applying a pre-load to a bevel gear device, wherein bevel gears are provided which are fixed to forward ends of shafts crossing each other, respectively, and in mesh with each other, and a turning force applied to one of said shafts is imparted to the other, characterized in that: at least either one of said shafts is made movable in the axial direction thereof; and first spring means for applying a first pre-load to said movable shaft in an advancing direction, in which said bevel gears are in mesh with each other, with a first force to bias said movable shaft in the advancing direction and second spring means for applying a second pre-load to said movable shaft in the direction opposite to said first force with a second force weaker than said first force to reduce a tooth surface force between said bevel gears caused by said first force.
Claim 3
Dependent Claim
25 words
A mechanism for applying a pre-load to a bevel gear device as set forth in claim 1, wherein said movable shaft is an output shaft.
Claim 4
Dependent Claim
48 words
A mechanism for applying a pre-load to a bevel gear device as set forth in claim 1, wherein stopper means adjustable in its position is further provided for controlling a value of the axial movement of said movable shaft only to the value of fluctuations of the backlash.
Claim 5
Dependent Claim
60 words
A mechanism for applying a pre-load to a bevel gear device as set forth in claim 1, wherein said first spring means is a compression coil spring for appling said first pre-load to said movable shaft in the advancing direction through an angular bearing and a retainer, which are held on said movable shaft, for rotatably supporting said movable shaft.
Claim 6
Dependent Claim
49 words
A mechanism for applying a pre-load to a bevel gear device as set forth in claim 4, wherein said angular bearing is made movable relative to a gear housing including an outer race in the axial direction thereof and said retainer is made movable relative to said movable shaft.
Claim 7
Dependent Claim
37 words
A mechanism for applying a pre-load to a bevel gear device as set forth in claim 1, wherein said second spring means is a compression coil spring provided on the forward end face of the bevel gear.
Claim 8
Dependent Claim
51 words
A mechanism for applying a pre-load to a bevel gear device as set forth in claim 1, wherein said first spring means is a compression coil spring confined between a retainer held by an angular bearing for rotatably supporting said movable shaft and a spring holder held by said movable shaft.
Claim 9
Dependent Claim
28 words
A mechanism for applying a pre-load to a bevel gear device as set forth in claim 7, wherein an inner race of said angular bearing is made movable.
Claim 10
Dependent Claim
148 words
A mechanism for applying a pre-load to a bevel gear device, wherein bevel gears are provided which are fixed to ends of shafts crossing each other, respectively, and in mesh with each other, and in which a turning force applied to one of said shafts is imparted to the other, characterized in that: at least one of said shafts is axially movable; and first spring means for applying a first pre-load to said movable shaft in an advancing direction, in which said bevel gears are in mesh with each other, with a first force to bias said movable shaft in the advancing direction and second spring means for applying a second pre-load to said movable shaft in a direction opposite to said first force with a second force weaker than said first force to reduce a tooth surface force between said bevel gears caused by said first force.
Claim 11
Dependent Claim
148 words
A mechanism for applying a pre-load to a bevel gear device, wherein bevel gears are provided which are fixed to ends of shafts crossing each other, respectively, and in mesh with each other, and in which a turning force applied to one of said shafts is imparted to the other, characterized in that: at least one of said shafts is axially movable; and first spring means for applying a first pre-load to said movable shaft in an advancing direction, in which said bevel gears are in mesh with each other, with a first force to bias said movable shaft in the advancing direction and second spring means for applying a second pre-load to said movable shaft in a direction opposite to said first force with a second force weaker than said first force to reduce a tooth surface force between said bevel gears caused by said first force.
Claim 12
Dependent Claim
106 words
A mechanism for applying a pre-load to a bevel gear device, comprising: first and second shafts, one of which is axially movable, wherein bevel gears are fixed to ends of said shafts in mesh with each other in which a turning force applied to one of said shafts is imparted to the other; first spring means for applying a first force to said movable shaft in an axial direction toward said bevel gear of said second shaft; and second spring means for applying a second force to said movable shaft in a direction opposite said first force, said second force being weaker than said first force.
Claim 13
Dependent Claim
106 words
A mechanism for applying a pre-load to a bevel gear device, comprising: first and second shafts, one of which is axially movable, wherein bevel gears are fixed to ends of said shafts in mesh with each other in which a turning force applied to one of said shafts is imparted to the other; first spring means for applying a first force to said movable shaft in an axial direction toward said bevel gear of said second shaft; and second spring means for applying a second force to said movable shaft in a direction opposite said first force, said second force being weaker than said first force.
Claim 14
Dependent Claim
141 words
A mechanism for applying a pre-load to a bevel gear device comprising: first and second shafts, one of which is axially movable, wherein bevel gears are fixed to ends of said shafts in mesh with each other in which a turning force applied to one of said shafts is imparted to the other; first spring means disposed about said movable shaft and spaced from the end of said movable shaft on which the bevel gear is fixed, for applying a first force to said movable shaft in an axial direction toward said bevel gear of said second shaft; and second spring means adjacent the end of said movable shaft on which the bevel gear is fixed, for applying a second force to said movable shaft in a direction opposite said first force, said second force being weaker than said first force.
Claim 15
Dependent Claim
141 words
A mechanism for applying a pre-load to a bevel gear device comprising: first and second shafts, one of which is axially movable, wherein bevel gears are fixed to ends of said shafts in mesh with each other in which a turning force applied to one of said shafts is imparted to the other; first spring means disposed about said movable shaft and spaced from the end of said movable shaft on which the bevel gear is fixed, for applying a first force to said movable shaft in an axial direction toward said bevel gear of said second shaft; and second spring means adjacent the end of said movable shaft on which the bevel gear is fixed, for applying a second force to said movable shaft in a direction opposite said first force, said second force being weaker than said first force.
Claim 16
Dependent Claim
149 words
A mechanism for applying a pre-load to a bevel gear device, comprising: first and second shafts, one of which is axially movable, wherein bevel gears are fixed to ends of said shafts in mesh with each other in which a turning force applied to one of said shafts is imparted to the other; an angular bearing disposed about said movable shaft and spaced from the end of said movable shaft on which the bevel gear is fixed; first spring means adjacent to said angular bearing for applying a first force to said movable shaft in an axial direction toward said bevel gear of said second shaft; and second spring means adjacent the end of said movable shaft on which the bevel gear is fixed for applying a second force to said movable shaft in a direction opposite said first force, said second force being weaker than said first force.
Claim 17
Dependent Claim
149 words
A mechanism for applying a pre-load to a bevel gear device, comprising: first and second shafts, one of which is axially movable, wherein bevel gears are fixed to ends of said shafts in mesh with each other in which a turning force applied to one of said shafts is imparted to the other; an angular bearing disposed about said movable shaft and spaced from the end of said movable shaft on which the bevel gear is fixed; first spring means adjacent to said angular bearing for applying a first force to said movable shaft in an axial direction toward said bevel gear of said second shaft; and second spring means adjacent the end of said movable shaft on which the bevel gear is fixed for applying a second force to said movable shaft in a direction opposite said first force, said second force being weaker than said first force.
References Cited (Backward Citations)
FR787272A
Cited
FR1159505A
Cited
US2984121A
Cited
US3252348A
Cited
US3333481A
Cited
US3608644A
Cited
DE2213284A1
Cited
US4282765A
Cited
US4406174A
Cited
JPS58125760A
Cited
JPS58160873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |