Patent US2564738A successfully refreshed from Google Patents.
US4546233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Robot arm having bearing support
Assignee: Mitsubishi Electric Corp
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Filing: 1984-01-26
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Granted: 1985-10-08
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Expires: 2004-01-26
Abstract
Abstract A robot includes a generally cylindrical stationary table adapted to be fixed on a floor, and has an outer peripheral surface formed with a circumferential gear. A rotary table is supported rotatably about the outer peripheral surface of the stationary table. A motor for rotating the rotary table is provided on the rotary table, and is connected to a motor gear meshing with the circumferential gear on the stationary table. An upper arm is supported tiltably on the rotary table, and has an upper end on which a front arm is supported. The front arm carries at its free end a working member, such as a welding torch. Another motor is provided on the upper arm for tilting it. A tension spring is disposed in the stationary table and has one end connected to the lower end of the upper arm, and another end connected to the stationary table at a point thereof about which the rotary table is rotatable. The tension spring serves to reduce the load on the motor which tilts the upper arm.
Inventors
- 👤 Hirotoshi Yasuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
B; B25; B25J; B25J9/00; B25J9/02; B25J9/04; B25J9/046; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/287; B25J19/00; B25J19/0008; B25J19/0016
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
A robot comprising: a generally cylindrical stationary table adapted to be fixed on a floor, and having an outer peripheral surface formed with a circumferential gear; a rotary table supported rotatably about said outer peripheral surface of said stationary table; a first motor fixed on said rotary table and having an output shaft operably connected to a motor gear, said motor gear meshing with said circumferential gear to thereby rotate said rotary table about said stationary table when said first motor is energized; a front arm carrying a working member at its free end; an upper arm supported tiltably on said rotary table, and having an upper end on which the other end of said front arm is supported; a second motor provided on said upper arm for tilting said upper arm; and a tension spring having one end connected to the lower end of said upper arm, and the other end connected to said stationary table at a bearing point about which said rotary table is rotatable.
Claim 2
Dependent Claim
168 words
A robot comprising: a generally cylindrical stationary table adapted to be fixed on a floor, and having an outer peripheral surface formed with a circumferential gear; a rotary table supported rotatably about said outer peripheral surface of said stationary table; a first motor fixed on said rotary table and having an output shaft operably connected to a motor gear, said motor gear meshing with said circumferential gear to thereby rotate said rotary table about said stationary table when said first motor is energized; a front arm carrying a working member at its free end; an upper arm supported tiltably on said rotary table, and having an upper end on which the other end of said front arm is supported; a second motor provided on said upper arm for tilting said upper arm; and a tension spring having one end connected to the lower end of said upper arm, and the other end connected to said stationary table at a bearing point about which said rotary table is rotatable.
Claim 3
Dependent Claim
28 words
A robot as set forth in claim 1, wherein said second motor is mounted at the point at which said upper arm is supported on said rotary table.
Claim 4
Dependent Claim
42 words
A robot as set forth in claim 2, wherein said lower end of said upper arm has a first spring support to which a first spring is attached, said one end of said spring being threadedly connected to said first spring support.
Claim 5
Dependent Claim
24 words
A robot as set forth in claim 3, wherein said other end of said spring is tiltable and rotatably coupled to said stationary table.
Claim 6
Dependent Claim
35 words
A robot as set forth in claim 3, wherein said bearing point of said stationary table comprises a spherically concave surface in which a second spring support having a spherically convex surface is rotatably fitted.
Claim 7
Dependent Claim
23 words
A robot as set forth in claim 5, wherein said other end of said spring is threadedly connected to said second spring support.
Claim 8
Dependent Claim
28 words
A robot as set forth in claim 6, wherein each of said first and second spring supports is provided with a pin for securing said spring in position.
Claim 9
Dependent Claim
22 words
A robot as set forth in claim 1, further comprising bearing means on said stationary table for rotatably supporting said rotary table.
Claim 10
Dependent Claim
22 words
A robot as set forth in claim 8, wherein a speed reducer is provided between said first motor and said motor gear.
Claim 11
Dependent Claim
16 words
A robot as set forth in claim 9, wherein said working member is a welding torch.
References Cited (Backward Citations)
US3840128A
Cited
GB1393349A
Cited
US4024961A
Cited
GB1485318A
Cited
DE2848385A1
Cited
US4378959A
Cited
SU854708A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |