CN201703371U - Automatic variable-pressure brake valve - Google Patents
Automatic variable-pressure brake valve Download PDFInfo
- Publication number
- CN201703371U CN201703371U CN2010202277783U CN201020227778U CN201703371U CN 201703371 U CN201703371 U CN 201703371U CN 2010202277783 U CN2010202277783 U CN 2010202277783U CN 201020227778 U CN201020227778 U CN 201020227778U CN 201703371 U CN201703371 U CN 201703371U
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- brake
- gas
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model discloses an automatic variable-pressure brake valve, which structurally comprises a lower valve body and a valve cover, wherein an instruction gas opening is arranged on the valve cover, a brake gas inlet opening, a brake gas outlet opening and an exhaust opening are arranged on the valve body, a sealing valve is arranged among the brake gas inlet opening, the brake gas outlet opening and the exhaust opening, a first resetting spring is sheathed and arranged on a valve post of the sealing valve, a large piston and a small piston are sequentially arranged in an inner cavity of the valve cover from top to bottom, the valve body is provided with a large piston position limiting table, a lower extending post for controlling the opening and the closing of the sealing valve is arranged on the small piston, and the first reset spring is sheathed on the lower extending post body. The utility model ensures that in-time efficient brake force can be provided during the braking, the secondary pressure boosting can be carried out, and the durability of the brake force can be ensured. Thereby, the brake safety can be greatly improved.
Description
Technical field
The utility model relates to vehicle, mechanical general-duty valve switch device, specifically a kind of automatic transformation brake activation valve.
Background technology
Brake activation valve in the past all is to adopt single-piston, floating-caliper brake to brake, and there is following defective in the single-piston, floating-caliper brake braking: on the one hand, if when the recoil area of the area of thrust surface of piston and piston equates, its braking force deficiency.On the other hand, if the area of thrust surface of piston during greater than its recoil area, it is too fast air pressure output to have occurred, has caused the fearful phenomenon of having only half foot brake.
The utility model content
The purpose of this utility model will provide a kind of automatic transformation brake activation valve exactly, gently step on during brake soft, heavily step on stronger, to satisfy the needs of vehicle brake device.
The utility model is achieved in that this automatic transformation brake activation valve comprises valve body and valve gap down, on valve gap, have instruction gas gas port, on valve body, have braking gas admission port, braking gas air extractor duct and exhausr port, between described braking gas admission port, braking gas air extractor duct, the exhausr port sealed valve is set, on the valve rod of sealed valve, is set with first pull back spring; Big piston and valve piston are installed in the valve gap inner chamber of and instruction gas gas port fluid communication from top to bottom successively, described valve body is shaped on the big piston limit dais, be shaped on the following post of stretching that the described sealed valve of control opens and closes on the described valve piston, stretch under described and be with second pull back spring on the cylinder.
The utility model is equipped with big piston and valve piston from top to bottom successively in the valve gap inner chamber, both made the recoil area of the area of thrust surface of piston greater than it, thereby guarantees that sufficient braking force is arranged, and brakes successively because of two pistons again, can realize secondary booster.Thereby effectively overcome in the prior art or braking force is not enough or the problem of half foot brake, having guaranteed can provide braking force timely and effectively when drag, can guarantee the persistence and the incremental of braking force again.Thereby improve braking safety greatly.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
Shown in Figure 1, this is the transformation brake activation valve automatically, comprise valve body 6 and valve gap 2 down, on valve gap, have instruction gas gas port 1, on valve body, have braking gas admission port 7, braking gas air extractor duct 8 and exhausr port 13, in the cavity between described braking gas admission port 7, braking gas air extractor duct 8, the exhausr port 13 sealed valve 9 is set, described sealed valve 9 is to be provided with jump ring 12 in this cavity lower end, is being provided with the Sealing shield ring 11 that is used to cut off passage between braking gas air extractor duct 8 and the exhausr port 13 above this jump ring 12.The valve rod body end face of sealed valve 9 is provided with the seal ring that cuts off passage between braking gas admission port 7, the braking gas air extractor duct 8.On the valve rod body, be set with first pull back spring 10.Big piston 3 and valve piston 5 are installed in the valve gap inner chamber of and instruction gas gas port 1 fluid communication from top to bottom successively, between big piston 3 and valve gap inner chamber, O-ring seal 4 are installed.Described valve piston 5 is installed in the inner chamber of big piston 3, is provided with the sealing pad between the two-piston wall body.Be provided with seal ring between described valve piston and following valve body 6 internal chamber walls.On described valve body, be shaped on big piston limit dais 15.Be shaped on the following post of stretching that the described sealed valve of control 9 opens and closes on the described valve piston 5, stretch under described and be with second pull back spring 14 on the cylinder.Under this, stretch and offer hollow cavity on the post, to reduce the weight of this valve piston.
Principle of work of the present utility model is: when instruction gas gas port 1 comes gas, it is descending that big piston 3 promotes valve piston 5 beginnings, big piston 3 stops descending when going downwards to the position of limit dais 15, this moment, the following capital of stretching of valve piston 5 was opened sealed valve 9, braking gas admission port 7 and braking gas air extractor duct 8 are communicated, realize drag.At this moment, the gap of the sealed valve 9 that valve piston 5 is opened is less, and braking gas admission port 7 gives braking gas air extractor duct 8 air demands less, thereby brakes soft this moment.Along with the air feed air pressure of instruction gas gas port 1 constantly increases, it is descending that valve piston 5 is pressing sealed valve 9 to continue, and sealed valve 9 is fully opened, and brakes gas admission port 7 this moment and give braking gas air extractor duct 8 air demands bigger, forms secondary booster, make heavily step on stronger.
When instruction gas gas port 1 no gas, the rebounded thrust of the air pressure and second pull back spring 14 of valve piston 5, promote big piston 3 return together, the return of valve piston 5 has been thrown off sealed valve 9, sealed valve 9 is return under the promotion of pull back spring 10, and the return of sealed valve 9 has sealed up communicating of braking gas admission port 7 and braking gas air extractor duct 8, and brake gas air extractor duct 8 and communicate with exhausr port 13 this moment, waste gas is discharged from exhausr port 13, the brake off brake.
Claims (2)
1. automatic transformation brake activation valve, comprise valve body (6) and valve gap (2) down, on valve gap, have instruction gas gas port (1), on valve body, have braking gas admission port (7), braking gas air extractor duct (8) and exhausr port (13), it is characterized in that between described braking gas admission port, braking gas air extractor duct, the exhausr port (13) sealed valve (9) being set, on the valve rod of sealed valve (9), be set with first pull back spring (10); Big piston (3) and valve piston (5) are installed in the valve gap inner chamber of and instruction gas gas port fluid communication from top to bottom successively, described valve body is shaped on big piston limit dais (15), be shaped on the following post of stretching that the described sealed valve of control (9) opens and closes on the described valve piston (5), stretch under described and be with second pull back spring (14) on the cylinder.
2. automatic transformation brake activation valve according to claim 1 is characterized in that described valve piston (5) is installed in the inner chamber of big piston (3), is provided with the sealing pad between the two-piston wall body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202277783U CN201703371U (en) | 2010-06-18 | 2010-06-18 | Automatic variable-pressure brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202277783U CN201703371U (en) | 2010-06-18 | 2010-06-18 | Automatic variable-pressure brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201703371U true CN201703371U (en) | 2011-01-12 |
Family
ID=43440523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202277783U Expired - Fee Related CN201703371U (en) | 2010-06-18 | 2010-06-18 | Automatic variable-pressure brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201703371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738330A (en) * | 2013-12-24 | 2014-04-23 | 日照市北业制动泵有限公司 | Air brake valve for automobile brake system |
| CN104192136A (en) * | 2014-09-22 | 2014-12-10 | 昌通科技有限公司 | 140-type relay valve |
-
2010
- 2010-06-18 CN CN2010202277783U patent/CN201703371U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738330A (en) * | 2013-12-24 | 2014-04-23 | 日照市北业制动泵有限公司 | Air brake valve for automobile brake system |
| CN104192136A (en) * | 2014-09-22 | 2014-12-10 | 昌通科技有限公司 | 140-type relay valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104583590B (en) | Forced air drive-type piston back-and-forth movement type oil pressure pump | |
| CN204110020U (en) | Differential type relay valve | |
| CN202250869U (en) | Gas circuit control system of screw compressor | |
| CN105545858B (en) | A kind of special Pneumatic valve of pneumohydraulic pressure-cylinder and pneumohydraulic pressure-cylinder | |
| CN201703371U (en) | Automatic variable-pressure brake valve | |
| CN204110021U (en) | A kind of rapid release valve assembly | |
| CN202251536U (en) | Clutch aided power separated pump for vehicle | |
| CN103912697A (en) | Air suction valve of subway air source system | |
| CN208845462U (en) | Cylinder energy conserving system | |
| CN202580081U (en) | Pressure regulating automatic gate valve | |
| CN202914865U (en) | Rapid air evacuation valve for pneumatic control system | |
| CN102383946B (en) | Exhaust braking device, engine system and automobile | |
| CN201982674U (en) | Pneumatic piston type on/off valve | |
| CN203082092U (en) | Internal breath type spring brake air chamber | |
| CN203797053U (en) | Air suction valve assembly for subway air source system | |
| CN204110022U (en) | A kind of rapid release valve | |
| CN201694184U (en) | Automatic voltage-transformation temperature-control brake valve | |
| CN209414289U (en) | Monoblock type pressure regulation reversal valve | |
| CN207485757U (en) | A kind of pneumohydraulic pressure-cylinder | |
| CN203257768U (en) | Mass flow bladder type energy accumulator | |
| CN102678951A (en) | Automatic pressure regulating type gate valve | |
| CN110641436A (en) | Hydraulic brake master cylinder for agricultural machinery | |
| CN201155573Y (en) | Inner pressure type self locking hoisting jack release valve | |
| CN209510951U (en) | Clutch booster with collecting cover | |
| CN2603261Y (en) | Power-saving stop-valve/check-valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20130618 |