CN102079302B - Air booster pump of engineering machinery brake system - Google Patents
Air booster pump of engineering machinery brake system Download PDFInfo
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- CN102079302B CN102079302B CN 201010570317 CN201010570317A CN102079302B CN 102079302 B CN102079302 B CN 102079302B CN 201010570317 CN201010570317 CN 201010570317 CN 201010570317 A CN201010570317 A CN 201010570317A CN 102079302 B CN102079302 B CN 102079302B
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Abstract
The invention discloses an air booster pump of an engineering machinery brake system. The air booster pump comprises an air cylinder and a hydraulic cylinder, wherein an air inlet (1) of the air cylinder is connected with an air outlet of an engine air compressor via an air brake valve, an oil outlet of the hydraulic cylinder is connected with an oil inlet of a brake piston oil cylinder; and an air cylinder piston (4) in the air cylinder is connected with a hydraulic piston (14) in the hydraulic cylinder via an air cylinder piston push rod (9), an air cylinder body (19) on the air cylinder is a cylinder structure with an opening at one end thereof, which derives from stretch forming of steel plates, and the end having the opening is provided with an air cylinder end cover (8). By adopting the technical scheme, the air cylinder body is changed to a steel plate stretching member from a cast aluminum member, the strength of the air cylinder body is increased, the production cycle is shortened, the cost is lowered and the performance is improved, thus the using performance and the service life of the product as well as the reliability of the brake system are enhanced; and the local improvement for an oil feeding valve avoids the direct impact of high pressure oil on rubber members and strengthens the durability of the product.
Description
Technical field
The invention belongs to the technical field of construction machinery and equipment, relate to the brake system in construction machinery and equipment, more particularly, the present invention relates to a kind of air boosting pump of braking system of engineering machinery.
Background technology
In the prior art, the most of pressurized air that adopts engine compressor to produce of the brake system of industrial wheeled equipment is carried out supercharging to synthetic brake fluid, thereby compresses braking frictional plate, reaches braking effect, and air boosting pump is the main device of supercharging.Air boosting pump sub-cylinder and hydraulic total pump two parts, shown in Figure 1 as in this Figure of description.
during braking, the pressurized air that enters from admission port 1 promotes the resistance that cylinder piston 4 overcomes pull back spring 5, by cylinder piston push rod 9, the hydraulic piston 14 of hydraulic total pump is moved to right, air in cylinder is passed through air breather assembly 11 emptyings, braking liquid in total pump housing produces high pressure, enter the piston oil-cylinder of drg, loosen the brake, pressurized air is returned from joint, cylinder piston 4 and hydraulic piston 14 reset under the effect of pull back spring 5, outside air enters cylinder by air breather assembly 11, the braking liquid of drg is in oil pipe flows back to master cylinder, total pump piston resets.Braking liquid returns to lubricating cup.Due to high frequent working condition and the work under bad environment of brake system, a large amount of dusts and moisture enter booster pump by air breather assembly 11 with air, and common air breather assembly of joining 11 is straight-through band filter net type respirator.
As shown in Figure 1, servo-unit cylinder block 19 of the prior art is aluminium castings, and outward appearance is coarse, and casing wall is very thick, the many and poor durability of production process medium sand pore, and the production cycle is long, and assembly space is large.
Summary of the invention
Problem to be solved by this invention is to provide a kind of air boosting pump of braking system of engineering machinery, its objective is in-use performance and the service life of improving air boosting pump, improves the reliability of brake system.
To achieve these goals, the technical scheme taked of the present invention is:
The air boosting pump of braking system of engineering machinery provided by the present invention, comprise cylinder, hydraulic actuating cylinder, the admission port of described cylinder is connected with the air extractor duct of engine air compressor by air brake valve, and the oil outlet of described hydraulic actuating cylinder is connected with the oil inlet of brake plunger oil cylinder; Cylinder piston in described cylinder is connected by the cylinder piston push rod with hydraulic piston in hydraulic actuating cylinder, and the cylinder block on described cylinder is the tube structure of the end opening that is shaped of steel plate stretching, and an end of its opening is established cylinder end piece.
Establish pull back spring between described cylinder piston and cylinder end piece, described pull back spring is the Compress Spring of turriform.
Described hydraulic piston is used back-up ring by the hole and the ram seat assembly that is located in hydraulic piston is connected with the cylinder piston push rod; Establish the repairing hole on the axis of described hydraulic piston; Establish the fuel-return valve assembly on described hydraulic piston.
Described cylinder block is captiveed joint by described cylinder end piece with the hydraulic cylinder of hydraulic actuating cylinder.
Described cylinder piston push rod and cylinder piston are threaded connection, and are provided with the viscose glue articulamentum between thread joint face.
Establish air breather assembly on described cylinder end piece.
Establish air bleed screw on the cylinder cover of oil outlet one end of hydraulic actuating cylinder on described hydraulic cylinder.
Form hermetically-sealed construction by O-ring seals and central seal circle between described cylinder piston push rod and cylinder end piece; Adopt O-ring seals to form hermetically-sealed construction between described cylinder end piece and hydraulic cylinder.
The present invention adopts technique scheme, and cylinder block changes steel plate stretching spare into by aluminum casting, increases the intensity of cylinder block, shorten the production cycle, reduced costs, improved performance, thereby improve in-use performance and the service life of product, improve the reliability of brake system; To the local improvement of oil inlet valve, avoid high pressure oil to the direct impact of Rubber Parts, strengthen durability of product.
Description of drawings
The below is briefly described the expressed content of each width accompanying drawing of this specification sheets and the mark in figure:
Fig. 1 is the described structural representation of this specification sheets background technology part;
Fig. 2 is structural representation of the present invention.
Be labeled as in figure:
1, admission port, 2, hexagonal nut, 3, welded nut, 4, cylinder piston, 5, pull back spring, 6, bar, 7, spring, 8, cylinder end piece, 9, cylinder piston push rod, 10, the central seal circle, 11, air breather assembly, 12, packing ring, 13, fuel-return valve assembly, 14, hydraulic piston, 15, hydraulic cylinder, 16, cylinder cover, 17, air bleed screw, 18, the repairing hole, 19, cylinder block, 20, big envelope, 21, plug screw.
The specific embodiment
The below contrasts accompanying drawing, by the description to embodiment, effect and principle of work, manufacturing process and operation using method etc. to the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, each several part and annexation, each several part, be described in further detail, to help those skilled in the art, inventive concept of the present invention, technical scheme had more complete, accurate and deep understanding.
Structure of the present invention as expressed in Fig. 2, the present invention is a kind of air boosting pump of braking system of engineering machinery, comprise cylinder, hydraulic actuating cylinder, the admission port 1 of described air boosting pump cylinder is connected with the air extractor duct of engine air compressor by air brake valve (existing a kind of valve in system), and the oil outlet of described hydraulic actuating cylinder is connected with the oil inlet of brake plunger oil cylinder; Cylinder piston 4 in described cylinder is connected by cylinder piston push rod 9 with hydraulic piston 14 in hydraulic actuating cylinder.
Admission port 1 is installed by the welded nut 3 on the cylinder body that is welded on the air boosting pump cylinder, and is undertaken fastening by hexagonal nut 2.Be provided with the plug screw 21 in standby hole on the cylinder body of air boosting pump cylinder.
In order to solve the problem that exists at the described present known technology of this specification sheets background technology part and to overcome its defective, realize improving in-use performance and the service life of air boosting pump, improve the goal of the invention of the reliability of brake system, the technical scheme that the present invention takes is:
The air boosting pump of braking system of engineering machinery provided by the present invention, the cylinder block 19 on described cylinder is the tube structure of an end opening of steel plate stretching shaping, an end of its opening is established cylinder end piece 8.
The present invention updates to cylinder block of the prior art, changes steel plate stretching spare into by aluminum casting, increases the intensity of cylinder block, has shortened the production cycle, reduces costs, and improves performance, thereby improves in-use performance and the service life of product.To the local improvement of oil inlet valve, avoid high pressure oil to the direct impact of Rubber Parts, strengthen durability of product.
Establish pull back spring 5 between described cylinder piston 4 and cylinder end piece 8, described pull back spring 5 is Compress Springs of turriform.
Also be provided with bar 6 and spring 7 on cylinder end piece 8, bar 6 and spring 7 are in the air chamber of cylinder, and spring 7 is enclosed within on bar 6, and bar 6 is inwardly stretched out, and after cylinder piston 4 motion certain distances, make bar 6 motions.When bar 6 motion, open the warning light switch that is connected on end cap, warning light is connected, and reminding driver air boosting pump braking liquid is not enough, avoids the generation of accident.Its other end stretches out cylinder end piece 8, is protected by big envelope 20, and plays dustproof effect.
Establish packing ring 12 on cylinder end piece 8 and end face that hydraulic cylinder 15 contacts, its effect is the position of restriction hydraulic piston 14 in hydraulic cylinder 15.
Under the effect of pull back spring 5, cylinder piston push rod 9 guarantees φ 3 apertures in hydraulic piston with ram seat assembly and hydraulic piston bottom surface disengagement, and namely repairing hole 18 is unimpeded, and braking liquid enters the inner chamber of hydraulic cylinder 15 by φ 3 apertures.
Principle of work of the present invention:
During braking, cross admission port 1 from the Pneumatic pipe cleaner of air brake valve air extractor duct and enter into the cylinder assembly inner chamber, promotion cylinder piston 4 assemblies move forward cylinder piston push rod 9 and head on the ram seat assembly, oil inlet valve seals the repairing hole 18 in hydraulic piston 14 apron assemblies, the pressure of the hydraulic oil in hydraulic cylinder 15 raises, and forms high pressure oil at the hydraulic cylinder inner chamber.When brake off, air pressure discharged, under the effect of pull back spring 5, repairing hole 18 was opened wide, and braking liquid returns to lubricating cup by repairing hole 18.
Cylinder piston push rod 9 of the present invention is threaded connection with cylinder piston 4, and is provided with the viscose glue articulamentum between thread joint face.
Establish air breather assembly 11 on cylinder end piece 8 of the present invention.
Establish air bleed screw 17 on the cylinder cover 16 of oil outlet one end of hydraulic actuating cylinder on hydraulic cylinder 15 of the present invention.Residual air in the hydraulic actuating cylinder inner chamber is discharged by air bleed screw 17.
Form hermetically-sealed construction by O-ring seals (specification is 17 * 2.65) and central seal circle 10 between cylinder piston push rod 9 of the present invention and cylinder end piece 8, guarantee sealing; Adopt O-ring seals to form hermetically-sealed construction between described cylinder end piece 8 and hydraulic cylinder 15, guarantee sealing.
The present invention has following characteristics:
1. the product assembly shortens, and dwindles assembly space, has reduced cost.
2. to the local improvement of oil inlet valve, avoid high pressure oil to the direct impact of Rubber Parts, strengthen durability of product.
3. cylinder block changes steel plate stretching spare into by aluminum casting, increases the intensity of cylinder block, shortens the production cycle, reduces costs, and improves performance, thereby improves in-use performance and the service life of product.
The above is exemplarily described the present invention by reference to the accompanying drawings; 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 technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (1)
1. the air boosting pump of a braking system of engineering machinery, comprise cylinder, hydraulic actuating cylinder, the admission port of described cylinder (1) is connected with the air extractor duct of engine air compressor by air brake valve, and the oil outlet of described hydraulic actuating cylinder is connected with the oil inlet of brake plunger oil cylinder; Cylinder piston in described cylinder (4) is connected by cylinder piston push rod (9) with hydraulic piston (14) in hydraulic actuating cylinder;
Admission port (1) is installed by the welded nut on the cylinder body that is welded on the air boosting pump cylinder (3), and is undertaken fastening by hexagonal nut (2); Be provided with the plug screw (21) in standby hole on the cylinder body of air boosting pump cylinder;
It is characterized in that:
Cylinder block on described cylinder (19) is the tube structure of an end opening of steel plate stretching shaping, and an end of its opening is established cylinder end piece (8);
Establish pull back spring (5) between described cylinder piston (4) and cylinder end piece (8), described pull back spring (5) is the Compress Spring of turriform;
Also be provided with bar (6) and spring (7) on cylinder end piece (8), bar (6) and spring (7) are in the air chamber of cylinder, and spring (7) is enclosed within on bar (6), and bar (6) is inwardly stretched out, after cylinder piston (4) motion certain distance, make bar (6) motion; When bar (6) moves, open the warning light switch that is connected on end cap, warning light is connected, and reminding driver air boosting pump braking liquid is not enough, avoids the generation of accident; Its other end stretches out cylinder end piece (8), is protected by big envelope (20), and plays dustproof effect;
Described hydraulic piston (14) is used back-up ring by the hole and is located at the interior ram seat assembly of hydraulic piston (14) and is connected with cylinder piston push rod (9); Establish repairing hole (18) on the axis of described hydraulic piston (14); Establish fuel-return valve assembly (13) on described hydraulic piston (14);
Described cylinder block (19) is captiveed joint by described cylinder end piece (8) with the hydraulic cylinder (15) of hydraulic actuating cylinder;
Described cylinder piston push rod (9) is threaded connection with cylinder piston (4), and is provided with the viscose glue articulamentum between thread joint face;
Establish air breather assembly (11) on described cylinder end piece (8);
Establish air bleed screw (17) on the cylinder cover (16) of oil outlet one end of the upper hydraulic actuating cylinder of described hydraulic cylinder (15);
Form hermetically-sealed construction by O-ring seals and central seal circle (10) between described cylinder piston push rod (9) and cylinder end piece (8); Adopt O-ring seals to form hermetically-sealed construction between described cylinder end piece (8) and hydraulic cylinder (15);
The method of work of described air boosting pump is:
During braking, cross admission port (1) from the Pneumatic pipe cleaner of air brake valve air extractor duct and enter into the cylinder assembly inner chamber, promoting cylinder piston (4) assembly moves forward, cylinder piston push rod (9) heads on the ram seat assembly, oil inlet valve seals the repairing hole (18) in hydraulic piston (14) apron assembly, the pressure of the hydraulic oil in hydraulic cylinder (15) raises, and forms high pressure oil at the hydraulic cylinder inner chamber;
When brake off, when air pressure discharges, under the effect of pull back spring (5), repairing hole (18) is opened wide, and braking liquid returns to lubricating cup by repairing hole (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010570317 CN102079302B (en) | 2010-12-02 | 2010-12-02 | Air booster pump of engineering machinery brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010570317 CN102079302B (en) | 2010-12-02 | 2010-12-02 | Air booster pump of engineering machinery brake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102079302A CN102079302A (en) | 2011-06-01 |
| CN102079302B true CN102079302B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010570317 Active CN102079302B (en) | 2010-12-02 | 2010-12-02 | Air booster pump of engineering machinery brake system |
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| CN (1) | CN102079302B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424042A (en) * | 2011-09-28 | 2012-04-25 | 芜湖市安芜汽车制动元件有限公司 | Air booster pump structure |
| CN102431537A (en) * | 2011-12-19 | 2012-05-02 | 芜湖盛力制动有限责任公司 | Air boost pump of engineering mechanical braking system |
| CN106618751A (en) * | 2016-11-23 | 2017-05-10 | 广州佳林医疗科技有限公司 | Automatic orthopedic flusher |
| CN111075684B (en) * | 2019-12-30 | 2023-09-12 | 湖北双剑鼓风机股份有限公司 | Hydraulic drive's air compressor machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0236723A2 (en) * | 1986-03-03 | 1987-09-16 | AlliedSignal Inc. | Seal means for a master cylinder |
| CN1654251A (en) * | 2005-03-13 | 2005-08-17 | 陈光华 | Manufacturing method of automobile hydraulic brake master cylinder |
| CN201009880Y (en) * | 2007-03-15 | 2008-01-23 | 芜湖盛力制动有限责任公司 | Air enforcing pump |
| CN201228619Y (en) * | 2008-06-14 | 2009-04-29 | 芜湖盛力制动有限责任公司 | Air enforcing pump |
| CN201914237U (en) * | 2010-12-02 | 2011-08-03 | 芜湖盛力制动有限责任公司 | Air booster pump of engineering machinery brake system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56116550A (en) * | 1980-02-18 | 1981-09-12 | Nissan Motor Co Ltd | Master cylinder |
-
2010
- 2010-12-02 CN CN 201010570317 patent/CN102079302B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0236723A2 (en) * | 1986-03-03 | 1987-09-16 | AlliedSignal Inc. | Seal means for a master cylinder |
| CN1654251A (en) * | 2005-03-13 | 2005-08-17 | 陈光华 | Manufacturing method of automobile hydraulic brake master cylinder |
| CN201009880Y (en) * | 2007-03-15 | 2008-01-23 | 芜湖盛力制动有限责任公司 | Air enforcing pump |
| CN201228619Y (en) * | 2008-06-14 | 2009-04-29 | 芜湖盛力制动有限责任公司 | Air enforcing pump |
| CN201914237U (en) * | 2010-12-02 | 2011-08-03 | 芜湖盛力制动有限责任公司 | Air booster pump of engineering machinery brake system |
Non-Patent Citations (1)
| Title |
|---|
| JP昭56-116550A 1981.09.12 |
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| CN102079302A (en) | 2011-06-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: WUHU SHENGLI TECHNOLOGY CO., LTD Free format text: FORMER NAME: SHENGLI BRAKE CO., LTD., WUHU |
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| CP03 | Change of name, title or address |
Address after: 241003 No. 17 West Mountain Road, hi tech Industrial Development Zone, Anhui, Wuhu Patentee after: Wuhu Shengli Technology Shares Co., Ltd. Address before: 241003 No. 8, Jinshan Road, hi tech Industrial Development Zone, Yijiang District, Anhui, Wuhu Patentee before: Shengli Brake Co., Ltd., Wuhu |
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