CN103758723A - Air pump of engineering machinery braking system - Google Patents
Air pump of engineering machinery braking system Download PDFInfo
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- CN103758723A CN103758723A CN201310739560.4A CN201310739560A CN103758723A CN 103758723 A CN103758723 A CN 103758723A CN 201310739560 A CN201310739560 A CN 201310739560A CN 103758723 A CN103758723 A CN 103758723A
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- cylinder
- push rod
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- braking system
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Abstract
The invention discloses an air pump of an engineering machinery braking system. The air pump comprises a cylinder casing, a cylinder piston, a push rod, a connection cover, a valve assembly, a hydraulic piston assembly and a hydraulic cylinder body. The cylinder casing and the connection cover form a cylinder assembly. The hydraulic piston assembly is arranged in the hydraulic cylinder body. The cylinder piston is arranged in an inner cavity of the cylinder assembly, one end of the push rod is connected with the cylinder piston in a fastening mode, and the other end of the push rod penetrates a center hole of the connection cover to be connected with the hydraulic piston assembly. The connection cover and the push rod are sealed through a Y-shaped sealing ring and a dustproof ring. By means of the technical scheme, the sealing mode between the connection cover and the push rod is changed, sealing is conducted through the Y-shaped ring, the guide sleeve and the dustproof ring, the guide sleeve is added to support the push rod, eccentric abrasion of a piston leather ring and the Y-shaped ring is reduced, and product reliability is improved. Connection of the hydraulic piston and the push rod is changed to be cylindrical pin connection, connection reliability is improved, and the service life of products is prolonged.
Description
Technical field
The invention belongs to the technical field of braking system of engineering machinery.Specifically, the present invention relates to a kind of air boost pump of engineering mechanical braking system.
Background technique
As shown in Figure 1, in the prior art, the sealing between air boosting pump connecting cover and push rod that braking system of engineering machinery is used, employing be the combination of central seal circle and O-ring seals, the sealing tooth of central seal circle is easily worn, and causes product leakage of oil; Push rod is connected with back-up ring by hole with hydraulic piston, and back-up ring easily comes off, and causes product failure; The sealing of ram seat assembly forward, during product return, instantaneous pressure oil impact rubber causes it aging, damaged, causes brake failure.
Summary of the invention
The invention provides a kind of air boost pump of engineering mechanical braking system, its objective is the reliability that improves product.
To achieve these goals, the technological scheme that the present invention takes is:
Air boost pump of engineering mechanical braking system of the present invention, comprises cylinder shell, cylinder piston, push rod, connecting cover, valve assembly, hydraulic piston assembly, hydraulic cylinder; Described cylinder shell and connecting cover form cylinder assembly; Described hydraulic piston assembly is located in hydraulic cylinder; Described cylinder piston is located in the inner chamber of cylinder assembly; Described push rod one end and cylinder piston are fastenedly connected, and the other end, through the center hole of described connecting cover, is connected with described hydraulic piston assembly; Between described connecting cover and push rod, adopt y-shaped ring and dust ring sealing.
Between described y-shaped ring and dust ring, be provided with guide sleeve, described guide sleeve is enclosed within on described push rod.
Described hydraulic piston assembly is connected with push rod by straight pin.
It is to be connected by thread belt glue that described push rod is fastenedly connected with cylinder piston.
Between described connecting cover and hydraulic cylinder, adopt O-ring seals sealing.
Described valve assembly is fixed on the bottom surface of hydraulic piston assembly by Steel Cable Baffle Ring.
Between described cylinder piston and connecting cover, establish return spring; Under the effect of described return spring, described push rod is thrown off ram seat and valve assembly sealing surface, makes in hydraulic piston assembly aperture unimpeded, and brake fluid enters oil hydraulic cylinder inner chamber by aperture.
The present invention adopts technique scheme, changes the sealing means between connecting cover and push rod, seals with Y shape circle, guide sleeve, dust ring, increases guide sleeve push rod is supported, and reduces the eccentric wear of gas piston apron and Y shape circle, improves product reliability; By changing liquid piston and being connected of push rod straight pin into, connect, connect the high reliability connecting, thus the working life of improving product.
Accompanying drawing explanation
Below the mark in the each width accompanying drawing of this specification expressed content and figure is briefly described:
Fig. 1 is the structural representation of prior art;
Fig. 2 is structural representation of the present invention.
In figure, be labeled as:
1, cylinder shell, 2, gas piston apron, 3, cylinder piston, 4, return spring, 5, push rod, 6, dust ring, 7, guide sleeve, 8, connecting cover, 9, y-shaped ring, 10, spring, 11, straight pin, 12, valve assembly, 13, hydraulic piston assembly, 14, hydraulic cylinder, 15, Steel Cable Baffle Ring, 16, ram seat, 17, O-ring seals, 18, aperture.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail, to help those skilled in the art to have more complete, accurate and deep understanding to inventive concept of the present invention, technological scheme.
Structure of the present invention as expressed in Fig. 2, is a kind of air boost pump of engineering mechanical braking system, comprises cylinder shell 1, cylinder piston 3, push rod 5, connecting cover 8, valve assembly 12, hydraulic piston assembly 13, hydraulic cylinder 14; Described cylinder shell 1 forms cylinder assembly with connecting cover 8; Described hydraulic piston assembly 13 is located in hydraulic cylinder 14; Described cylinder piston 3 is located in the inner chamber of cylinder assembly; Described push rod 5 one end and cylinder piston 3 are fastenedly connected, and the other end, through the center hole of described connecting cover 8, is connected with described hydraulic piston assembly 13.
Annexation: air boosting pump suction port is connected with air brake valve (original a kind of valve in system) air outlet, and oil outlet is connected with break filler opening.
In order to solve the problem of prior art existence and to overcome its defect, realize the goal of the invention of the reliability that improves product, the technological scheme that the present invention takes is:
As shown in Figure 2, air boost pump of engineering mechanical braking system of the present invention, adopts y-shaped ring 9 and dust ring 6 to seal between described connecting cover 8 and push rod 5.
Between described y-shaped ring 9 and dust ring 6, be provided with guide sleeve 7, described guide sleeve 7 is enclosed within on described push rod 5.
In order to improve the reliability of product, the structure of the product of the present invention to prior art is carried out Transform Type design and update, between connecting cover 8 and push rod 5, adopt y-shaped ring 9, guide sleeve 7, dust ring 6 to seal, increasing guide sleeve 7 supports push rod 5, reduce the eccentric wear of gas piston apron 2 and y-shaped ring 9, improve product reliability.
Guide sleeve 7 in the middle of connecting cover 8 guarantees that push rod 5 moves between two parties, not eccentric wear of gas piston apron 2.Change the direction of rubber seal face, avoid the frontal impact of high pressure oil to caulking gum, thereby improve the working life of product.
Described hydraulic piston assembly 13 is connected with push rod 5 by straight pin 11.Change hydraulic piston and being connected of push rod 5 into straight pin 11 and connect, connect the high reliability connecting.
Block by annular spring 10 at straight pin two ends, and it can not come off from hydraulic piston assembly 13.
It is to be connected by thread belt glue that described push rod 5 is fastenedly connected with cylinder piston 3.Improve the join strength of push rod 5 and cylinder piston 3.
Between described connecting cover 8 and hydraulic cylinder 14, adopt O-ring seals 17 to seal.
Between push rod 5 and connecting cover 8, by dust ring 6 and y-shaped ring 9, guarantee sealing.
Described valve assembly 12 is fixed on the bottom surface of hydraulic piston assembly 13 by Steel Cable Baffle Ring 15.
Between described cylinder piston 3 and connecting cover 8, establish return spring 4; Under the effect of described return spring 4, described push rod 5 is thrown off ram seat 16 and valve assembly 12 sealing surfaces, makes in hydraulic piston assembly 13 aperture 18 unimpeded, and brake fluid enters oil hydraulic cylinder inner chamber by aperture 18.
Under the effect of return spring 4, push rod 5 is thrown off ram seat 16 and valve assembly 12 sealing surfaces, guarantees that diameter in hydraulic piston assembly 13 is that the aperture 18 of Φ 3 is unimpeded, and brake fluid enters oil hydraulic cylinder inner chamber by Φ 3 apertures 18.
Working principle of the present invention and dynamic position relation:
During braking, to suction port air inlet, air pressure from air brake valve air outlet enters into cylinder assembly inner chamber by suction port, promotion push rod, piston assembly move forward, push rod 5 heads on ram seat 16 and seals valve assembly sealing surface and hydraulic piston Φ 3 apertures, oil inlet valve seals the repairing hole in hydraulic piston assembly, at hydraulic cylinder inner chamber, forms high pressure oil, produces pressure.
During brake off, air pressure discharges, and under the effect of return spring 14, the aperture 18 of Φ 3 repairings opens wide, and brake fluid returns to lubricating cup by Φ 3 apertures.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technological scheme carry out; or without improving, design of the present invention and technological scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (7)
1. an air boost pump of engineering mechanical braking system, comprises cylinder shell (1), cylinder piston (3), push rod (5), connecting cover (8), valve assembly (12), hydraulic piston assembly (13), hydraulic cylinder (14); Described cylinder shell (1) forms cylinder assembly with connecting cover (8); Described hydraulic piston assembly (13) is located in hydraulic cylinder (14); Described cylinder piston (3) is located in the inner chamber of cylinder assembly; Described push rod (5) one end and cylinder piston (3) are fastenedly connected, and the other end, through the center hole of described connecting cover (8), is connected with described hydraulic piston assembly (13); It is characterized in that: between described connecting cover (8) and push rod (5), adopt y-shaped ring (9) and dust ring (6) sealing.
2. according to air boost pump of engineering mechanical braking system claimed in claim 1, it is characterized in that: between described y-shaped ring (9) and dust ring (6), be provided with guide sleeve (7), described guide sleeve (7) is enclosed within on described push rod (5).
3. according to air boost pump of engineering mechanical braking system claimed in claim 1, it is characterized in that: described hydraulic piston assembly (13) is connected with push rod (5) by straight pin (11).
4. according to air boost pump of engineering mechanical braking system claimed in claim 1, it is characterized in that: it is to be connected by thread belt glue that described push rod (5) is fastenedly connected with cylinder piston (3).
5. according to air boost pump of engineering mechanical braking system claimed in claim 1, it is characterized in that: between described connecting cover (8) and hydraulic cylinder (14), adopt O-ring seals (17) sealing.
6. according to air boost pump of engineering mechanical braking system claimed in claim 1, it is characterized in that: described valve assembly (12) is fixed on the bottom surface of hydraulic piston assembly (13) by Steel Cable Baffle Ring (15).
7. according to air boost pump of engineering mechanical braking system claimed in claim 1, it is characterized in that: between described cylinder piston (3) and connecting cover (8), establish return spring (4); Under the effect of described return spring (4), described push rod (5) is thrown off ram seat (16) and valve assembly (12) sealing surface, make the middle aperture (18) of hydraulic piston assembly (13) unimpeded, brake fluid enters oil hydraulic cylinder inner chamber by aperture (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739560.4A CN103758723A (en) | 2013-12-27 | 2013-12-27 | Air pump of engineering machinery braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739560.4A CN103758723A (en) | 2013-12-27 | 2013-12-27 | Air pump of engineering machinery braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103758723A true CN103758723A (en) | 2014-04-30 |
Family
ID=50526017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310739560.4A Pending CN103758723A (en) | 2013-12-27 | 2013-12-27 | Air pump of engineering machinery braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103758723A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104176033A (en) * | 2014-09-05 | 2014-12-03 | 芜湖盛力科技股份有限公司 | Engineering machinery and commercial vehicle relay air pressurizer |
| CN104214254A (en) * | 2014-08-28 | 2014-12-17 | 南车眉山车辆有限公司 | Brake cylinder piston assembly for railway vehicle |
| CN104386049A (en) * | 2014-12-20 | 2015-03-04 | 芜湖盛力科技股份有限公司 | Air-assisted hydraulic brake air assistor for engineering machinery |
| CN104477157A (en) * | 2014-12-20 | 2015-04-01 | 芜湖盛力科技股份有限公司 | Air-assisted hydraulic air booster pump for magnetically levitated train |
| CN104867782A (en) * | 2015-05-27 | 2015-08-26 | 张春荣 | Novel permanent magnetism operating mechanism |
| CN105697765A (en) * | 2014-12-11 | 2016-06-22 | 现代岱摩斯股份有限公司 | Auxiliary transmission piston assembly of multi-range manual transmission and assembling method thereof |
| CN107972652A (en) * | 2017-12-25 | 2018-05-01 | 芜湖盛力科技股份有限公司 | A kind of braking system of engineering machinery air boosting pump internal respiration structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141295A (en) * | 1988-05-09 | 1992-08-25 | Alfred Teves Gmbh | Brake power booster with diaphragm position sensing devices |
| US6386648B1 (en) * | 2000-10-27 | 2002-05-14 | Robert Bosch Corporation | Master cylinder and brake booster for a brake system |
| CN201228619Y (en) * | 2008-06-14 | 2009-04-29 | 芜湖盛力制动有限责任公司 | Air enforcing pump |
| CN201486791U (en) * | 2009-05-11 | 2010-05-26 | 芜湖盛力制动有限责任公司 | Air booster pump for vehicle braking |
| CN102852753A (en) * | 2012-09-21 | 2013-01-02 | 淮南矿业(集团)有限责任公司 | Hydraulic grouting pump |
| CN202674315U (en) * | 2012-06-11 | 2013-01-16 | 杭州纽创工业设计有限公司 | Cylinder cover sealing mechanism for hydraulic oil cylinder |
| CN203702477U (en) * | 2013-12-27 | 2014-07-09 | 芜湖盛力科技股份有限公司 | Air booster pump of engineering mechanical braking system |
-
2013
- 2013-12-27 CN CN201310739560.4A patent/CN103758723A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141295A (en) * | 1988-05-09 | 1992-08-25 | Alfred Teves Gmbh | Brake power booster with diaphragm position sensing devices |
| US6386648B1 (en) * | 2000-10-27 | 2002-05-14 | Robert Bosch Corporation | Master cylinder and brake booster for a brake system |
| CN201228619Y (en) * | 2008-06-14 | 2009-04-29 | 芜湖盛力制动有限责任公司 | Air enforcing pump |
| CN201486791U (en) * | 2009-05-11 | 2010-05-26 | 芜湖盛力制动有限责任公司 | Air booster pump for vehicle braking |
| CN202674315U (en) * | 2012-06-11 | 2013-01-16 | 杭州纽创工业设计有限公司 | Cylinder cover sealing mechanism for hydraulic oil cylinder |
| CN102852753A (en) * | 2012-09-21 | 2013-01-02 | 淮南矿业(集团)有限责任公司 | Hydraulic grouting pump |
| CN203702477U (en) * | 2013-12-27 | 2014-07-09 | 芜湖盛力科技股份有限公司 | Air booster pump of engineering mechanical braking system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214254A (en) * | 2014-08-28 | 2014-12-17 | 南车眉山车辆有限公司 | Brake cylinder piston assembly for railway vehicle |
| CN104176033A (en) * | 2014-09-05 | 2014-12-03 | 芜湖盛力科技股份有限公司 | Engineering machinery and commercial vehicle relay air pressurizer |
| CN105697765A (en) * | 2014-12-11 | 2016-06-22 | 现代岱摩斯股份有限公司 | Auxiliary transmission piston assembly of multi-range manual transmission and assembling method thereof |
| CN104386049A (en) * | 2014-12-20 | 2015-03-04 | 芜湖盛力科技股份有限公司 | Air-assisted hydraulic brake air assistor for engineering machinery |
| CN104477157A (en) * | 2014-12-20 | 2015-04-01 | 芜湖盛力科技股份有限公司 | Air-assisted hydraulic air booster pump for magnetically levitated train |
| CN104867782A (en) * | 2015-05-27 | 2015-08-26 | 张春荣 | Novel permanent magnetism operating mechanism |
| CN107972652A (en) * | 2017-12-25 | 2018-05-01 | 芜湖盛力科技股份有限公司 | A kind of braking system of engineering machinery air boosting pump internal respiration structure |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140430 |