CN111022624B - Structure for inhibiting redundant degree of freedom of floating part of planet row - Google Patents
Structure for inhibiting redundant degree of freedom of floating part of planet row Download PDFInfo
- Publication number
- CN111022624B CN111022624B CN201911315987.5A CN201911315987A CN111022624B CN 111022624 B CN111022624 B CN 111022624B CN 201911315987 A CN201911315987 A CN 201911315987A CN 111022624 B CN111022624 B CN 111022624B
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- China
- Prior art keywords
- gearbox
- gear teeth
- brake drum
- drum
- planet row
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/10—Braking arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention belongs to the field of mechanical transmission, and relates to a novel structure for inhibiting redundant degrees of freedom of a planet row floating part. A plurality of gear teeth on the outer drum of the brake drum A of the gearbox in the structure are processed into circular arcs, the circular arcs and the gear teeth of the friction plate B form clearance fit, and a plurality of gear teeth on two sides of the circular arcs on the outer drum of the brake drum A of the gearbox are milled to form a plurality of corresponding gear teeth according to the inside diameter of the addendum circle of the gear in the brake drum of the gearbox to form a groove; and a cylindrical pair is formed between the friction plate B and the outer drum of the brake drum A of the gearbox in the axial direction. The invention has the advantages of inhibiting redundant freedom degree in the design of the floating gear ring of the planet row, reducing interference sources of unstable factors in the process of combining and separating friction plates, greatly reducing the risk of damage and failure of the friction plates, the floating gear ring of the planet row and even the bearing of the whole planetary gearbox caused by the burn of the friction plates, and improving the reliability of the friction plates, the floating parts of the planet row and even the whole planetary transmission equipment.
Description
Technical Field
The invention belongs to the field of mechanical transmission, and relates to a novel structure for inhibiting redundant degrees of freedom of a planet row floating part.
Background
Because the planetary gearbox is often designed with a floating gear ring, the gear ring is in a full floating state in the meshing process, and no degree of freedom is limited; in the braking process, the engagement between the floating gear ring and the planet gear is unstable, although the planet gear and the sun gear are restrained, the floating of the floating gear ring and the friction plate on the floating gear ring are important sources of a plurality of unstable factors, and because the structural design of the full floating gear ring releases excessive freedom degrees, the friction plate is easy to interfere in other directions of the axial freedom degrees although the axial running is finally realized, so that the combination process of the friction plate is unstable; when the instability is in a bad working condition, the phenomena of burning of the friction plate, crack generation of tooth root and the like are easily caused, so that the collapse of the braking process is caused, and the broken teeth of the friction plate, the broken teeth of the gear teeth and even the damage of the gear teeth on the gear ring are caused. In order to avoid instability of the floating structure and damage and failure of the whole planet row part caused by the instability, a new structure for inhibiting redundant freedom degrees of the planet row floating part is needed to be designed.
Disclosure of Invention
In view of the technical problems, the invention provides a novel structure for inhibiting redundant degrees of freedom of a floating member of a planet row, and the invention adopts the circular arc shape of a formulated drum to restrain the radial degree of freedom of a friction plate steel sheet, so that the friction plate can move only in the axial direction, the disturbance of the friction plate steel sheet outside the axial degree of freedom is reduced, the operation working condition of the friction plate is also improved, the risk of damage and failure of the friction plate and the planet row thereof is greatly reduced, and the reliability of the whole floating gear ring of the planet row and the friction plate thereon is improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a new structure for inhibiting the redundant degree of freedom of a planet row floating part is characterized in that a plurality of gear teeth on an outer drum of a brake drum A of a gearbox are processed into circular arcs, the circular arcs and the gear teeth of a friction plate B form clearance fit, and a plurality of corresponding gear teeth on two sides of the circular arcs on the outer drum of the brake drum A of the gearbox are milled according to the inside diameter of an addendum circle of an internal gear of the brake drum of the gearbox to form a groove; the friction plate B and the outer drum of the gearbox brake drum A form a cylindrical pair in the axial direction, the friction plate B and the outer drum can move mutually along the axial direction and also can rotate around the tooth side clearance direction, and only the rotating space degree is in the tooth side clearance range.
Furthermore, the number of the plurality of gear teeth processed into circular arcs on the outer drum of the gearbox brake drum A is 4-6.
Furthermore, the number of the gear teeth milled on the two sides of the arc on the outer drum of the brake drum A of the gearbox is 2-3.
The invention has the advantages of inhibiting redundant freedom degree in the design of the floating gear ring of the planet row, reducing interference sources of unstable factors in the process of combining and separating friction plates, greatly reducing the risk of damage and failure of the friction plates, the floating gear ring of the planet row and even the bearing of the whole planetary gearbox caused by the burn of the friction plates, and improving the reliability of the friction plates, the floating parts of the planet row and even the whole planetary transmission equipment.
Drawings
Fig. 1 is a schematic structural diagram of a novel structure for inhibiting redundant degrees of freedom of a planet row floating member.
In the figure: a, a gear box brake drum, B, friction plates (steel sheets), 1, 2-3 corresponding gear teeth are milled according to the inside diameter of the addendum circle of a gear in the brake drum, 2-circular arcs processed according to the diameter of the excircle of the friction plate (steel sheet) form clearance fit with the excircle of the friction plate (steel sheet), the degree of the circular arcs is determined according to actual conditions, and the number of teeth of the friction plates (steel sheets) is approximately 4-6 (determined according to the actual size of the friction plate).
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in FIG. 1, the invention provides a new structure for inhibiting the redundant degree of freedom of a planet row floating member, a plurality of gear teeth on an outer drum of a brake drum A of a gearbox are processed into an arc 2, the arc is in clearance fit with the gear teeth of a friction plate (steel sheet) B, and a plurality of gear teeth on two sides of the arc on the outer drum of the brake drum A of the gearbox are milled with a plurality of corresponding gear teeth according to the inside diameter of an addendum circle of an inner gear of the brake drum of the gearbox to form a groove; the friction plate (steel sheet) B and the outer drum of the gearbox brake drum A form a cylindrical pair in the axial direction (namely the normal of the paper surface), the friction plate (steel sheet) B and the outer drum can move mutually along the axial direction, and can rotate around the axial direction (namely the tooth side clearance direction), and only the rotating space degree is in the tooth side clearance range. But the freedom degree of the friction plate (steel sheet) B in other two directions vertical to the axial direction is restrained, thereby greatly improving the working condition of the friction plate in the braking process, greatly reducing the unstable factors causing the damage of the floating gear ring and the friction plate in the braking process, and improving the reliability of the floating gear ring and the friction plate in the braking process.
The invention has the advantages of inhibiting redundant freedom degree in the design of the floating gear ring of the planet row, reducing interference sources of unstable factors in the process of combining and separating friction plates, greatly reducing the risk of damage and failure of the friction plates, the floating gear ring of the planet row and even the bearing of the whole planetary gearbox caused by the burn of the friction plates, and improving the reliability of the friction plates, the floating parts of the planet row and even the whole planetary transmission equipment.
Claims (3)
1. A structure for restraining redundant freedom degree of a planet row floating part is characterized in that a plurality of gear teeth on an outer drum of a brake drum A of a gearbox are processed into circular arcs, the circular arcs and the gear teeth of a friction plate B form clearance fit, and a plurality of gear teeth on two sides of the circular arcs on the outer drum of the brake drum A of the gearbox are milled to form a plurality of corresponding gear teeth according to the inside diameter of an addendum circle of an internal gear of the brake drum of the gearbox to form a groove; the friction plate B and the outer drum of the gearbox brake drum A form a cylindrical pair in the axial direction, the friction plate B and the outer drum can move mutually along the axial direction and also can rotate around the tooth side clearance direction, and only the rotating space degree is in the tooth side clearance range.
2. The structure for suppressing the redundant degree of freedom of the planetary row floating member as set forth in claim 1, wherein the number of the plurality of gear teeth formed in the circular arc on the outer drum of the transmission brake drum a is 4 to 6.
3. The structure for suppressing the redundant degrees of freedom of the floating members of the planetary row as set forth in claim 1 or 2, wherein the number of the gear teeth milled on both sides of the arc of the section on the outer drum of the transmission brake drum a is 2-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911315987.5A CN111022624B (en) | 2019-12-19 | 2019-12-19 | Structure for inhibiting redundant degree of freedom of floating part of planet row |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911315987.5A CN111022624B (en) | 2019-12-19 | 2019-12-19 | Structure for inhibiting redundant degree of freedom of floating part of planet row |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111022624A CN111022624A (en) | 2020-04-17 |
| CN111022624B true CN111022624B (en) | 2021-03-19 |
Family
ID=70209687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911315987.5A Active CN111022624B (en) | 2019-12-19 | 2019-12-19 | Structure for inhibiting redundant degree of freedom of floating part of planet row |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111022624B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB405957A (en) * | 1932-05-05 | 1934-02-05 | Andrew Gordon Wilson | Improvements in or relating to variable speed gearing |
| DE1480298A1 (en) * | 1964-11-17 | 1969-07-10 | Teves Gmbh Alfred | Friction brake for motor vehicles, especially tracked vehicles |
| JPS58207533A (en) * | 1982-12-25 | 1983-12-03 | Aisin Seiki Co Ltd | Hydraulic operation type frictional engagement apparatus |
| US5560455A (en) * | 1995-08-16 | 1996-10-01 | Northrop Grumman Corporation | Brakes rotors/drums and brake pads particularly adapted for aircraft/truck/train/ and other heavy duty applications |
| CN202040249U (en) * | 2011-04-28 | 2011-11-16 | 杭州萧山红旗摩擦材料有限公司 | Paper-based friction plate for hydraulic motor |
| US9169884B2 (en) * | 2012-01-23 | 2015-10-27 | Caterpillar Inc. | Wet brake assembly |
| CN205533918U (en) * | 2016-04-19 | 2016-08-31 | 厦门厦工机械股份有限公司 | Improvement structure of friction disc group |
-
2019
- 2019-12-19 CN CN201911315987.5A patent/CN111022624B/en active Active
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| Publication number | Publication date |
|---|---|
| CN111022624A (en) | 2020-04-17 |
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