CN102501879A - Locomotive tread unit brake with constant braking force - Google Patents
Locomotive tread unit brake with constant braking force Download PDFInfo
- Publication number
- CN102501879A CN102501879A CN2011103384419A CN201110338441A CN102501879A CN 102501879 A CN102501879 A CN 102501879A CN 2011103384419 A CN2011103384419 A CN 2011103384419A CN 201110338441 A CN201110338441 A CN 201110338441A CN 102501879 A CN102501879 A CN 102501879A
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- cam
- brake
- brake cylinder
- magnifying
- piston
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Abstract
The invention discloses a locomotive tread unit brake with constant braking force, comprising a brake shoe force transmission mechanism (9), a brake cylinder (1), a bush (2), a brake piston (3) and a piston leather cup (4) which jointly form a sealed pressure working cavity. The front end of a magnifying cam (5) is hinged with a lower end (6) of the brake piston, the rear end of the magnifying cam (5) is hinged with a hinge point (7) of the brake cylinder, a working curved surface (8) of the magnifying cam (5) is a logarithmic spiral adopting the hinge point (7) of the brake cylinder as the origin of coordinates. Any point on a curve of the logarithmic spiral has a unique pressure angle, and accordingly a unique braking leverage is realized. Accordingly, constant braking force is assuredly outputted by the magnifying cam (5) when the magnifying cam (5) operates at any positions.
Description
Technical field
The present invention relates to the railway locomotive technology, relate in particular to a kind of constant braking power locomotive tread units drg.
Background technology
Locomotive tread units drg is to be the foundation brake rigging that is used for the locomotive wheel tread brake of propulsion source with the pressurized air, is the final device for carrying out said of locomotive brake function, for the safe in operation of locomotive provides safeguard, on various kinds of vehicles, is widely used.Representative type locomotive tread units brake structural is to form the sealing load epitrochoidal chamber jointly by brake cylinder casing, lining, braking piston and piston leather cup, and having pressurized air just to charge into can produce initial braking force on the braking piston.Amplifying cam is the amplifier element of braking force, and its front end is hinged with braking piston lower end, and rear end and brake cylinder casing are hinged.The working curved surface that amplifies cam be one relative its with the eccentric of brake cylinder casing hinge-point, its formal parameter has determined the leverage ratio (both drg was finally exported the braking force and the initial proportionate relationship of braking force) of drg.
When filling the air port and charge into pressurized air, the braking piston moves downward, and promotes to amplify cam and rotates around its hinge-point with brake cylinder casing.The working curved surface that amplifies cam promotes force transmission mechanism drive brake head and stretches out, and brake shoe entrusted by brake shoe and violent the friction taken place in wheel tread applying back, and the generation brake action realizes that locomotive slows down, stops.
The working curved surface that amplifies cam is the eccentric of relative itself and a brake cylinder casing hinge-point.The structures shape of eccentric on its face the angle of obliquity of each point be continually varying, every each is different.And the leverage ratio of drg equals the inverse of angle of obliquity tangent value.This has just caused when the amplification cam is in the different working position, and leverage ratio also changes simultaneously, and braking force is also just inevitable to fluctuate within the specific limits, can't guarantee constant braking force output.
Summary of the invention
The object of the invention overcomes the deficiency of above-mentioned prior art exactly, and a kind of unique leverage ratio that has is provided, guarantee to amplify cam no matter the work of any position all can persevering customization takeoff output novel constant braking power locomotive tread units drg.
The objective of the invention is existing like this: a kind of constant braking power locomotive tread units drg; Comprise brake shoe force transmission mechanism (9) and sealing load epitrochoidal chamber (1); Lining (2), braking piston (3) and piston leather cup (4) are set in sealing load epitrochoidal chamber (1) brake cylinder casing; The front end of the amplification cam (5) of driving brake shoe force transmission mechanism (9) is hinged with braking piston lower end (6); Rear end and brake cylinder casing hinge-point (7) are hinged, and the working curved surface (8) that it is characterized in that amplifying cam (5) is for being the logarithmic spiral of the origin of coordinates with itself and brake cylinder casing hinge-point (7).
Scheme of the present invention; Owing to the working curved surface that original eccentric is amplified cam changes into itself and brake cylinder casing hinge-point is the logarithmic spiral (also being equiangular spiral) of the origin of coordinates; Its arbitrarily any angle of obliquity K all be a definite value; Just mean that also any point on this curve all has unique angle of obliquity, thereby also just have unique leverage ratio that this has just guaranteed to amplify cam no matter in the work of any position constant braking force output can be arranged all.
Description of drawings
Fig. 1 is the constant braking power locomotive tread units drg generalized section of the embodiment of the invention.
Fig. 2 is the amplification cam work curved surface scheme drawing in the embodiment of the invention constant braking power locomotive tread units drg.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to accompanying drawing 1.The constant braking power locomotive tread units drg of this instance is made up of brake shoe force transmission mechanism (9) and sealing load epitrochoidal chamber (1).Lining (2), braking piston (3) and piston leather cup (4) are set in the brake cylinder casing of sealing load epitrochoidal chamber (1).The front end of amplification cam (5) that wherein is used to drive the brake shoe transmission device is hinged with braking piston lower end (6), and rear end and brake cylinder casing hinge-point (7) are hinged.
Referring to accompanying drawing 2.The working curved surface (8) that amplifies cam (5) is to be the logarithmic spiral (also being equiangular spiral) of the origin of coordinates with itself and brake cylinder casing hinge-point (7).
During work, pressurized air charges into from filling air port (10), and braking piston (3) moves downward, and promote to amplify cam (5) and rotates around its hinge-point (7) with brake cylinder casing.The working curved surface that amplifies cam (5) promotes force transmission mechanism drive brake shoe and stretches out, and fits with wheel tread.Because amplifying the working curved surface of cam and be with itself and brake cylinder casing hinge-point (7) is the logarithmic spiral of the origin of coordinates, has isogonality, both logarithmic spiral all equated with all angle of cut ψ that cross the ray of limit.Because of logarithmic spiral has above-mentioned characteristic, so the angle of cut ψ of the given logarithmic spiral of any parameter and the ray of crossing limit is a determined value.And on the logarithmic spiral arbitrarily the angle of obliquity K of any be the complementary angle (both K+ ψ=90 °) of angle of cut ψ, so on the logarithmic spiral arbitrarily the angle of obliquity K of any be a definite value equally.Any point on this curve all has unique angle of obliquity like this, thereby also just has unique leverage ratio.This has just guaranteed to amplify cam no matter in the work of any position constant braking force output can be arranged all.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (1)
1. constant braking power locomotive tread units drg; Comprise brake shoe force transmission mechanism (9) and sealing load epitrochoidal chamber (1); Lining (2), braking piston (3) and piston leather cup (4) are set in sealing load epitrochoidal chamber (1) brake cylinder casing; The front end of the amplification cam (5) of driving brake shoe force transmission mechanism (9) is hinged with braking piston lower end (6); Rear end and brake cylinder casing hinge-point (7) are hinged, and the working curved surface (8) that it is characterized in that amplifying cam (5) is for being the logarithmic spiral of the origin of coordinates with itself and brake cylinder casing hinge-point (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103384419A CN102501879A (en) | 2011-10-31 | 2011-10-31 | Locomotive tread unit brake with constant braking force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103384419A CN102501879A (en) | 2011-10-31 | 2011-10-31 | Locomotive tread unit brake with constant braking force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102501879A true CN102501879A (en) | 2012-06-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103384419A Pending CN102501879A (en) | 2011-10-31 | 2011-10-31 | Locomotive tread unit brake with constant braking force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102501879A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112472A (en) * | 2013-01-29 | 2013-05-22 | 常州庞丰机电科技有限公司 | Hydraulic pressure braking clamp device |
| CN109532927A (en) * | 2019-01-04 | 2019-03-29 | 西南交通大学 | A kind of novel track Flat car brake device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0081467A1 (en) * | 1981-11-26 | 1983-06-15 | SAB WABCO S.p.A. | Brake unit operated by fluid under pressure, particularly for the wheels of railway vehicles |
| EP0392752A1 (en) * | 1989-04-11 | 1990-10-17 | Westinghouse Brake And Signal Holdings Limited | Vehicle brake actuator |
| CN2531372Y (en) * | 2002-02-09 | 2003-01-15 | 苏州试验仪器总厂 | Mechanical braking mechanism of impact testing table |
| CN2709966Y (en) * | 2004-07-01 | 2005-07-13 | 苏州东菱振动试验仪器有限公司 | Table braking device of impact test equipment |
| CN102072128A (en) * | 2009-11-23 | 2011-05-25 | 罗伯特·博世有限公司 | Eccentric wheel for driving hydraulic piston pump |
-
2011
- 2011-10-31 CN CN2011103384419A patent/CN102501879A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0081467A1 (en) * | 1981-11-26 | 1983-06-15 | SAB WABCO S.p.A. | Brake unit operated by fluid under pressure, particularly for the wheels of railway vehicles |
| EP0392752A1 (en) * | 1989-04-11 | 1990-10-17 | Westinghouse Brake And Signal Holdings Limited | Vehicle brake actuator |
| CN2531372Y (en) * | 2002-02-09 | 2003-01-15 | 苏州试验仪器总厂 | Mechanical braking mechanism of impact testing table |
| CN2709966Y (en) * | 2004-07-01 | 2005-07-13 | 苏州东菱振动试验仪器有限公司 | Table braking device of impact test equipment |
| CN102072128A (en) * | 2009-11-23 | 2011-05-25 | 罗伯特·博世有限公司 | Eccentric wheel for driving hydraulic piston pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112472A (en) * | 2013-01-29 | 2013-05-22 | 常州庞丰机电科技有限公司 | Hydraulic pressure braking clamp device |
| CN103112472B (en) * | 2013-01-29 | 2015-06-10 | 常州庞丰机电科技有限公司 | Hydraulic pressure braking clamp device |
| CN109532927A (en) * | 2019-01-04 | 2019-03-29 | 西南交通大学 | A kind of novel track Flat car brake device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Guoming Inventor after: Wang Zhuomin Inventor after: Wang Xudong Inventor after: Yang Huaijun Inventor after: Gao Feng Inventor before: Wang Guoming Inventor before: Wang Zhuomin Inventor before: Wang Xudong Inventor before: Yang Huaijun Inventor before: Gao Feng |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120620 |