CN201914237U - Air booster pump of engineering machinery brake system - Google Patents
Air booster pump of engineering machinery brake system Download PDFInfo
- Publication number
- CN201914237U CN201914237U CN201020639181XU CN201020639181U CN201914237U CN 201914237 U CN201914237 U CN 201914237U CN 201020639181X U CN201020639181X U CN 201020639181XU CN 201020639181 U CN201020639181 U CN 201020639181U CN 201914237 U CN201914237 U CN 201914237U
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- booster pump
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Abstract
The utility model discloses an air booster pump of an engineering machinery brake system, which comprises an air cylinder and a hydraulic cylinder. An air inlet of the air cylinder is connected with an air outlet of an engine air compressor through a pneumatic brake valve, an oil outlet of the hydraulic cylinder is connected with an oil inlet of a brake piston cylinder, a cylinder piston (4) in the air cylinder is connected with a hydraulic piston (14) in the hydraulic cylinder through an air cylinder piston push rod (9), a body (19) of the air cylinder is in a tube structure with one open end and formed by stretching a steel plate, and a cylinder end cover (8) is arranged at the open end of the air cylinder. By adopting the technical scheme, the body of the air cylinder is made of a steel plate stretched part instead of an aluminum casting, so that strength of the body of the air cylinder is enhanced, production cycle is shortened, cost is reduced and performance is improved. Therefore, utilization performance of the air booster pump is improved, service life thereof is prolonged, and reliability of a brake system is enhanced. By partially modifying an oil inlet valve, direct impact of high-pressure oil to a rubber part is avoided and product durability is enhanced.
Description
Technical field
The utility model belongs to the technical field of construction machinery and equipment, relates to the brake system in the construction machinery and equipment, and more particularly, the utility model relates to a kind of air booster pump of construction machinery and equipment brake system.
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 the air booster pump then is the main device of supercharging.Air booster pump sub-cylinder and hydraulic total pump two parts, shown in Figure 1 as in this Figure of description.
Glancing impact, 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 hydraulic piston 14 of hydraulic total pump is moved to right, air in the 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, and the braking liquid of drg is in oil pipe flows back to master cylinder, and total pump piston resets.Braking liquid returns lubricating cup.Because the high frequent working condition and the work under bad environment of brake system, a large amount of dusts and moisture pass through air breather assembly 11 with the air admission booster pump, 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 big.
The utility model content
Problem to be solved in the utility model provides a kind of air booster pump of construction machinery and equipment brake system, its objective is the in-use performance and the service life of improving the air booster pump, improves the reliability of brake system.
To achieve these goals, the technical scheme taked of the utility model is:
The air booster pump of construction machinery and equipment brake system provided by the utility model, comprise cylinder, hydraulic actuating cylinder, the admission port of described cylinder links to each other by the air extractor duct of air brake valve with the engine air press, and the oil outlet of described hydraulic actuating cylinder is connected with the oil inlet of brake plunger oil cylinder; Cylinder piston in the described cylinder is connected by the cylinder piston push rod with hydraulic piston in the hydraulic actuating cylinder, and the cylinder block on the described cylinder is the tube structure of an end opening of steel plate stretch forming, 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 compression spring of turriform.
Described hydraulic piston is connected with the cylinder piston push rod with back-up ring and the ram seat assembly that is located in the hydraulic piston by the hole; Establish the repairing hole on the axis of described hydraulic piston; Establish the fuel-return valve assembly on the 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 be by being threaded, and be provided with the adhesive-bonded joint layer between thread joint face.
Establish air breather assembly on the described cylinder end piece.
Establish air bleed screw on the cylinder cover of oil outlet one end of hydraulic actuating cylinder on the described hydraulic cylinder.
Form hermetically-sealed construction by O-ring seals and central seal circle between described cylinder piston push rod and the cylinder end piece; Adopt O-ring seals to form hermetically-sealed construction between described cylinder end piece and the hydraulic cylinder.
The utility model adopts technique scheme, and cylinder block changes the steel plate tensioning member into by aluminum casting, increases the intensity of cylinder block, shortened the production cycle, cost-cutting improves performance, thereby improve the in-use performance and the service life of product, improve the reliability of brake system; To the local improvement of oil-feed valve, avoid the direct impact of high pressure oil to Rubber Parts, strengthen durability of product.
Description of drawings
Below expressed content of each width of cloth accompanying drawing of this specification sheets and the mark among the figure are made brief description:
Fig. 1 is the described structural representation of this specification sheets background technology part;
Fig. 2 is a structural representation of the present utility model.
Be labeled as among the 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
Contrast accompanying drawing below, by description to embodiment, to effect and principle of work, the manufacturing process of the mutual alignment between the shape of the specific embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and manipulate method etc., be described in further detail, inventive concept of the present utility model, technical scheme had more complete, accurate and deep understanding to help those skilled in the art.
The of the present utility model structure expressed as Fig. 2, the utility model is a kind of air booster pump of construction machinery and equipment brake system, comprise cylinder, hydraulic actuating cylinder, the admission port 1 of described air booster pump cylinder links to each other with the air extractor duct of engine air press by air brake valve (existing a kind of valve in the 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 the described cylinder is connected by cylinder piston push rod 9 with hydraulic piston 14 in the hydraulic actuating cylinder.
Admission port 1 is installed by the welded nut on the cylinder body that is welded on air booster pump cylinder 3, and is undertaken fastening by hexagonal nut 2.On the cylinder body of air booster pump cylinder, be provided with the plug screw 21 in standby hole.
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 the in-use performance and the service life of air booster pump, improve the goal of the invention of the reliability of brake system, the technical scheme that the utility model is taked is:
The air booster pump of construction machinery and equipment brake system provided by the utility model, the cylinder block 19 on the described cylinder is the tube structure of an end opening of steel plate stretch forming, an end of its opening is established cylinder end piece 8.
The utility model updates to cylinder block of the prior art, changes the steel plate tensioning member into by aluminum casting, increases the intensity of cylinder block, has shortened the production cycle, and cost-cutting improves performance, thereby improves the in-use performance and the service life of product.To the local improvement of oil-feed valve, avoid the direct impact of high pressure oil to 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 compression 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 the bar 6, and bar 6 is inwardly stretched out, and behind cylinder piston 4 motion certain distances, make bar 6 motions.When bar 6 motions, open the warning light switch that is connected on the end cap, warning light is connected, and reminds chaufeur air booster pump braking liquid deficiency, 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 is thrown off ram seat assembly and hydraulic piston bottom surface, guarantees φ 3 apertures in the hydraulic piston, and promptly 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 utility model:
Glancing impact, 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, seal in repairing hole 18 in the inlet valve goalkeeper 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, when air pressure discharges, under the effect of pull back spring 5, repairing hole 18 is opened wide, and braking liquid returns lubricating cup by repairing hole 18.
Cylinder piston push rod 9 described in the utility model and cylinder piston 4 be by being threaded, and be provided with the adhesive-bonded joint layer between thread joint face.
Establish air breather assembly 11 on the cylinder end piece 8 described in the utility model.
Establish air bleed screw 17 on the cylinder cover 16 of oil outlet one end of hydraulic actuating cylinder on the hydraulic cylinder 15 described in the utility model.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 described in the utility model and the cylinder end piece 8, guarantee sealing; Adopt O-ring seals to form hermetically-sealed construction between described cylinder end piece 8 and the hydraulic cylinder 15, guarantee sealing.
The utlity model has following characteristics:
1. the product assembly shortens, and dwindles assembly space, has reduced cost.
2. to the local improvement of oil-feed valve, avoid the direct impact of high pressure oil, strengthen durability of product Rubber Parts.
3. cylinder block changes the steel plate tensioning member into by aluminum casting, increases the intensity of cylinder block, shortens the production cycle, and cost-cutting improves performance, thereby improves the in-use performance and the service life of product.
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; or design of the present utility model and technical scheme are directly applied to other occasion without improving, all within protection domain of the present utility model.
Claims (8)
1. the air booster pump of a construction machinery and equipment brake system, comprise cylinder, hydraulic actuating cylinder, the admission port of described cylinder (1) links to each other by the air extractor duct of air brake valve with the engine air press, and the oil outlet of described hydraulic actuating cylinder is connected with the oil inlet of brake plunger oil cylinder; Cylinder piston in the described cylinder (4) is connected by cylinder piston push rod (9) with hydraulic piston (14) in the hydraulic actuating cylinder, it is characterized in that: the cylinder block on the described cylinder (19) is the tube structure of an end opening of steel plate stretch forming, and an end of its opening is established cylinder end piece (8).
2. according to the air booster pump of the described construction machinery and equipment brake system of claim 1, it is characterized in that: establish pull back spring (5) between described cylinder piston (4) and cylinder end piece (8), described pull back spring (5) is the compression spring of turriform.
3. according to the air booster pump of claim 1 or 2 described construction machinery and equipment brake system, it is characterized in that: described hydraulic piston (14) is connected with cylinder piston push rod (9) with back-up ring and the ram seat assembly that is located in the hydraulic piston (14) by the hole; Establish repairing hole (18) on the axis of described hydraulic piston (14); Establish fuel-return valve assembly (13) on the described hydraulic piston (14).
4. according to the air booster pump of claim 1 or 2 described construction machinery and equipment brake system, it is characterized in that: described cylinder block (19) is captiveed joint by described cylinder end piece (8) with the hydraulic cylinder (15) of hydraulic actuating cylinder.
5. according to the air booster pump of claim 1 or 2 described construction machinery and equipment brake system, it is characterized in that: described cylinder piston push rod (9) and cylinder piston (4) be by being threaded, and be provided with the adhesive-bonded joint layer between thread joint face.
6. according to the air booster pump of claim 1 or 2 described construction machinery and equipment brake system, it is characterized in that: establish air breather assembly (11) on the described cylinder end piece (8).
7. according to the air booster pump of the described construction machinery and equipment brake system of claim 4, it is characterized in that: establish air bleed screw (17) on the cylinder cover (16) of oil outlet one end of the last hydraulic actuating cylinder of described hydraulic cylinder (15).
8. according to the air booster pump of the described construction machinery and equipment brake system of claim 4, it is characterized in that: form hermetically-sealed construction by O-ring seals and central seal circle (10) between described cylinder piston push rod (9) and the cylinder end piece (8); Adopt O-ring seals to form hermetically-sealed construction between described cylinder end piece (8) and the hydraulic cylinder (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020639181XU CN201914237U (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 |
|---|---|---|---|
| CN201020639181XU CN201914237U (en) | 2010-12-02 | 2010-12-02 | Air booster pump of engineering machinery brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201914237U true CN201914237U (en) | 2011-08-03 |
Family
ID=44414047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020639181XU Expired - Fee Related CN201914237U (en) | 2010-12-02 | 2010-12-02 | Air booster pump of engineering machinery brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201914237U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079302A (en) * | 2010-12-02 | 2011-06-01 | 芜湖盛力制动有限责任公司 | Air booster pump of engineering machinery brake system |
| 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 |
-
2010
- 2010-12-02 CN CN201020639181XU patent/CN201914237U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079302A (en) * | 2010-12-02 | 2011-06-01 | 芜湖盛力制动有限责任公司 | Air booster pump of engineering machinery brake system |
| CN102079302B (en) * | 2010-12-02 | 2013-06-12 | 芜湖盛力制动有限责任公司 | Air booster pump of engineering machinery brake system |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
|
| 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 |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20141202 |
|
| EXPY | Termination of patent right or utility model |