Brake pump and the application on loader thereof
Technical field
The present invention relates to brake pump and the application on loader thereof, belong to loader brake pump technical field.
Background technology
Existing loader parking brake uses centre disk type vehicle stopping braking, and brake disc is fixed on power transmission shaft, mechanical operation, should
Brake gear could can only use after loader comes to a complete stop, if loader uses under steam, easily causes power transmission shaft and car
Bridge damages;If loader quality is excessive or in acclive local parking, easily occurs that parking is malfunctioning, easily has an accident.
It addition, once handbrake mechanism or transmission shaft failure, brake will be malfunctioning;When driving, if air pump, pipeline, gas receiver, braking
Any component failure such as valve, brake will be malfunctioning, easily has an accident.
For drawbacks described above, brake air chamber of pump and brake chamber are improved by the applicant.In order to reduce cost, change
One brake chamber of brake pump after entering is provided with two set pistons of series connection, and brake chamber forms two liquid outlet channels, each go out liquid
Passage controls two braking clamps, though this brake pump compact conformation, once brake chamber shell is damaged, causes the braking of full car to lose
Spirit.Then, applicant improves again, uses an air chamber to control two set pistons in two brake chambers of parallel connection simultaneously, though
So the safety coefficient of brake pump increases, but owing in actual use, the brake-fluid pressure in two brake chambers is inconsistent, causes
In air chamber, there is unbalance stress phenomenon in rubber cup, often breaks down, and reliability is poor.
It addition, two kinds of brake pumps after above-mentioned improvement, being provided with check valve between fluid reservoir and brake chamber, brake-fluid can only
Flowing to brake chamber from fluid reservoir, along with increasing of access times, necessarily make the brake-fluid in brake chamber get more and more, brake is stepped on
Plate displacement is shorter and shorter, if desired, needs the artificial brake-fluid adjusted in brake chamber, makes troubles to use.Store up simultaneously
Flow container uses fixing connection with brake chamber, makes troubles repair demolition.
Summary of the invention
The technical problem to be solved in the present invention: provide braking effect good, use safety, brake pump that reliability is high and
Application on loader.
The technical solution of the present invention is: brake pump, and including brake pump housing, brake pump housing is provided with brake chamber, OK
Car brake chamber and stopping brake chamber, service brake cavity is positioned at the left side in stopping brake chamber, and brake chamber is positioned at a left side for service brake cavity
Side;Described service brake cavity is provided with the 1st rubber cup, the 1st rubber cup service brake cavity is divided into service brake left chamber and
Service brake air storage chamber, service brake air storage chamber is positioned at the right side of service brake left chamber, and service brake air storage chamber is provided with driving
Braking QI KOU;Stopping brake chamber is provided with the 1st piston, and the 1st piston can move left and right in stopping brake chamber, and the 1st piston will stop
Brake chamber is divided into stopping brake air storage chamber and the right chamber of stopping brake, and stopping brake air storage chamber is positioned at a left side for the right chamber of stopping brake
Side, stopping brake air storage chamber is provided with stopping brake QI KOU, is provided with the 1st push rod on the left of the 1st piston, and the right side of the 1st piston is provided with master
Spring, described brake chamber be provided with liquid outlet channel, brake chamber is provided with the 2nd piston, and the left side of the 2nd piston is provided with the 1st back-moving spring,
Being provided with the 2nd push rod on the left of 1st rubber cup, the 2nd push rod is cased with auxiliary spring, and the 2nd push rod can promote the 2nd piston to be moved to the left;
Brake chamber be arranged over out sap cavity, go out sap cavity and communicate with brake chamber, go out sap cavity and be arranged over fluid reservoir, go out sap cavity and be provided with the 1st
Control valve, the 1st control valve controls the inner chamber of fluid reservoir and communicates with going out sap cavity or close.
As improvement, going out to be provided with between sap cavity and brake chamber liquid passage and fore-set guide through hole, the 1st control valve includes
1 valve body, the 1st valve body is arranged over guide post, and guide post is cased with sealing gasket, is provided with the 1st control valve spring below the 1st valve body, top
Post guide through hole withstands on the outside of the 1st valve body lower surface equipped with fore-set, the top of fore-set;The centre of the 2nd piston is provided with cannelure,
Cannelure forms the 1st cylinder, and the left end of cannelure forms the 2nd cylinder, and the right-hand member of cannelure forms the 3rd cylinder, the 1st circle
Connected by round platform transition between cylinder and the 2nd cylinder;When the 2nd piston moves from left to right, the bottom of fore-set is successively from the 1st
Cylindrical surface, the surface of round platform, slide into the 2nd cylindrical surface, and fore-set ascends along fore-set guide through hole
Mobile, thus the 1st valve body is knocked over by fore-set, makes the 1st valve body inclined, the inner chamber of fluid reservoir is by going out sap cavity and brake chamber
Communicate;When the 2nd piston moves from right to left, fore-set bottom from the 2nd cylindrical surface, the surface of round platform, slides into the 1st successively
Cylindrical surface, fore-set descends movement along fore-set guide through hole, thus the 1st valve body returns to normally block shape
State, makes the inner chamber of fluid reservoir no longer communicate with going out sap cavity.
As improvement, going out sap cavity and be provided with female thread, the lower section of fluid reservoir is fluid reservoir base plate, and fluid reservoir base plate is provided with the 1st
Through hole, is provided with the 1st bolt in the lower section of the 1st through hole, is arranged above the 2nd bolt at the 1st through hole, and the 1st bolt includes the 1st
Bolt head and the 1st screw rod, the 1st screw rod is provided with external screw thread, and the center of the 1st bolt is provided with through tapped through hole, and the 1st bolt leads to
Crossing the 1st screw rod to be screwed in out on sap cavity, the 1st bolt head is positioned at the top of sap cavity, and fluid reservoir base plate is positioned at the 1st bolt head
Top;2nd bolt includes the 2nd bolt head and the 2nd screw rod, and the 2nd screw rod is provided with external screw thread, and the center of the 2nd bolt is provided with through
The 2nd through hole, the 2nd screw rod is screwed on the tapped through hole of the 1st bolt through the 1st through hole, and the 2nd bolt head is positioned at fluid reservoir base plate
Top, fluid reservoir base plate is fixed by the 1st bolt head and the 2nd bolt head.
The left end of above-mentioned 1st back-moving spring is provided with chassis, and the left end on chassis contacts with the inwall of brake chamber, liquid outlet channel
Being provided with the 2nd control valve, described 2nd control valve includes the 2nd rubber cup, the 2nd rubber cup base and the 2nd control valve spring, the 2nd
Rubber cup is positioned at the left side of the 2nd rubber cup base, and the right-hand member of the 2nd rubber cup base is provided with the 2nd control valve spring, the
2 control valve springs and chassis Elastic Contact;Chassis is provided with liquid-through hole;2nd rubber cup base be circumferentially with the 2nd through hole, the 2nd
The center of rubber cup is provided with the 3rd through hole, and the 2nd through hole and the 3rd through hole mutually stagger.
The right-hand member of above-mentioned brake pump housing is provided with screwed hole, and screwed hole is provided with the adjustment screw of adaptation, adjusts screw permissible
Limit the position that the 1st piston moves right.
The left side of above-mentioned 2nd piston is provided with the 1st blind hole, and the right side of the 2nd piston is provided with the 2nd blind hole, and the 1st cylinder sets
There is liquid passage, crossed liquid passage and the connection of the 1st blind hole;The right-hand member of the 1st back-moving spring is positioned at the 1st blind hole of the 2nd piston, and the 2nd
The left end of push rod is positioned at the 2nd blind hole of the 2nd piston, and the 3rd cylindrical periphery is provided with the sealing cannelure in more than 1 road, close
Envelope cannelure is built with piston packing.
Above-mentioned brake chamber is provided with brake switch;Service brake left chamber is provided with the 1st pneumostome, and the right chamber of stopping brake is provided with
2nd pneumostome.
As improvement, the right side of the 2nd rubber cup base is surrounded with the 1st spring location card article, the 2nd control valve spring
Left end is connected on the 1st spring location card article;The right side on chassis is surrounded with the 2nd spring location card article, a left side for the 1st back-moving spring
End is connected on the 2nd spring location card article;Liquid outlet channel is provided with out liquid bolt, and the right-hand member going out liquid bolt is provided with boss, goes out liquid spiral shell
Bolt is provided with through liquid outlet channel, and the 2nd rubber cup is buckled on the right-hand member outward flange of boss.
Above-mentioned stopping brake QI KOU connects with the parking brake valve air gate of parking brake valve, the parking brake valve air inlet of parking brake valve and gas storage
The gas receiver gas outlet connection of cylinder;The Foot braking valve air inlet of Foot braking valve connects with gas receiver gas outlet, pedal brake
The Foot braking valve QI KOU of valve connects with service brake QI KOU;Liquid outlet channel connects with braking clamp.
Loader, described loader is respectively the 1st brake equipped with above-mentioned 2 brake pumps and 4 braking clamps, 2 brake pumps
Pump and the 2nd brake pump;Described 4 braking clamps are respectively the 1st braking clamp, the 2nd braking clamp, the 3rd braking clamp and the 4th braking clamp, and the 1st
Stopping brake QI KOU that brake pump is provided with and the stopping brake QI KOU that the 2nd brake pump is provided with all with the parking brake valve air gate of parking brake valve
Connection, the parking brake valve air inlet of parking brake valve connects with the gas receiver gas outlet of gas receiver;The Foot braking valve of Foot braking valve enters
QI KOU connects with gas receiver gas outlet, the service brake gas that the Foot braking valve QI KOU of Foot braking valve is provided with the 1st brake pump
The service brake QI KOU that mouth is provided with the 2nd brake pump connects;Liquid outlet channel that 1st brake pump is provided with and the 2nd braking clamp, the 4th stop
Car pincers connection, liquid outlet channel and the 1st braking clamp, the 3rd braking clamp that the 2nd brake pump is provided with connect.
The solution have the advantages that: loader uses the brake pump of two set independences of the present invention, and often set brake pump is responsible for control
Making two braking clamps, even if a set of brake pump breaks down, the most another set of brake pump controls another two braking clamp, it is ensured that load
The use safety of machine.It addition, one independent air chamber of the present invention controls an independent brake chamber, the 1st rubber cup center is only with one
Individual 2nd push rod connects, and the 1st rubber cup will not be made unbalance stress phenomenon occur, and therefore, reliability of the present invention is high, and safety is good.
It addition, the present invention is provided with the 1st control valve between fluid reservoir and brake chamber, the 1st control valve can control brake-fluid at fluid reservoir
And can not have make the brake-fluid in brake chamber get more and more phenomenon with two-way flow between brake chamber, easy to use.Simultaneously
Fluid reservoir is with bolts with brake chamber, and repair demolition is convenient.Loader two set brake pumps share a set of Foot braking valve,
Parking brake valve, compact conformation, easy to use.
When loader parking, operate parking brake valve of the present invention, make to be positioned at the gases at high pressure pressure release of stopping brake air storage chamber, profit
With the elastic reset of main spring, promoting the 1st piston to be moved to the left, make the 1st push rod promote the 1st rubber cup, the 1st rubber cup is same
Time drive the 2nd push rod to be moved to the left, the 2nd push rod promotes the 2nd piston to be moved to the left, thus the brake-fluid pressure of the 2nd piston left end
Increase, and then make the braking clamp of connection brake.When loader is driven a vehicle, operate parking brake valve of the present invention, make stopping brake air storage chamber
Keeping connecting with gas receiver, the gases at high pressure in gas receiver promote main spring to move right, and the 1st rubber cup is at the bullet of auxiliary spring
Property promote under, drive the 2nd push rod to move right, thus the brake-fluid pressure of the 2nd piston left end reduce, and then make the brake of connection
Pincers release braking.It follows that use spring energy-storage braking and existing parking braking machine when loader brake pump of the present invention stops
There is essential distinction in tool braking, it addition, present invention brake is by the brake disc on braking clamp brake hub rather than by stopping
Brake disc braking on car clamp brake power transmission shaft, good braking effect, use safety, even if loader quality is excessive or is having slope
The local parking of degree, does not haves the malfunctioning situation of parking yet, is not susceptible to accident, uses reliable.Service brake of the present invention and stopping
Car braking is all to be braked by a set of braking clamp, simplifies structure, low cost.
When loader driving conditions needing a little stop and brake, operate Foot braking valve of the present invention, make service brake store up
Air chamber keeps connecting with gas receiver, and the gases at high pressure in gas receiver promote the 1st rubber cup to be moved to the left, and the 1st rubber cup is same
Time drive the 2nd push rod to be moved to the left, thus the brake-fluid pressure of the 2nd piston left end increases, and then makes the braking clamp of connection brake.
When loader driving conditions being not required to main points and stopping and brake, operate Foot braking valve of the present invention, in making service brake air storage chamber
Gas venting, gas pressure in service brake air storage chamber reduces, the 1st rubber cup under the resiliency urged of auxiliary spring, band
Dynamic 2nd push rod moves right, thus the brake-fluid pressure of the 2nd piston left end reduces, and then makes the braking clamp of connection release braking.
When loader is driven a vehicle, operate parking brake valve of the present invention, make stopping brake air storage chamber keep connecting with gas receiver.
Therefore, the present invention had both possessed brake function in the traveling of air boosting pump, but also had parking function, meanwhile,
When any component failure such as air pump, pipeline, gas receiver, brake valves, existing brake pump all will lose brake function.And this
Even if bright above-mentioned part fails, also automatically can be moved to the left under the effect that the machinery of main spring recovers, thus, make braking clamp move
Make, make loader self-actuating brake, improve the traffic safety of loader.Structure based on the present invention, equipped with brake pump of the present invention
Loader, when parking, can stop in certain gradient for a long time, it is not necessary to driver's long-term pedal brake pedal, saves
The driving intensity of driver, time saving and energy saving, and also safety is high, and braking effect is more longlasting stable.
The present invention will not make the brake-fluid in two independent fluid reservoirs mutually alter liquid, improves braking effect and the valency of use
Value.It addition, liquid outlet channel of the present invention is provided with control valve, it is therefore an objective to control the turnover of brake-fluid, when needing brake, high pressure brake-fluid
Flow to braking clamp;When need not brake, brake-fluid flows back to brake chamber, until sealing liquid outlet channel and brake chamber.
Accompanying drawing explanation
1, Fig. 1 is brake pump front view of the present invention.
2, Fig. 2 is brake pump top view of the present invention.
3, Fig. 3 is brake pump left view of the present invention.
4, Fig. 4 is brake pump partial sectional view of the present invention.
5, Fig. 5 is that the A-A of Fig. 1 is to sectional view.
6, Fig. 6 is that brake pump the 1st control valve of the present invention is going out the structural representation of sap cavity.
7, Fig. 7 is that the present invention brakes and pumps out sap cavity structural representation.
8, Fig. 8 is the present invention the 1st control valve front view.
9, Fig. 9 is the present invention the 1st control valve top view.
10, Figure 10 is that the B-B of Fig. 9 is to sectional view.
11, Figure 11 is liquid storage tank structure schematic diagram of the present invention.
12, Figure 12 is fluid reservoir of the present invention and the 1st bolt, the 2nd bolt combine schematic diagram.
13, Figure 13 is brake chamber structural representation of the present invention.
14, Figure 14 is the present invention the 2nd control valve structural representation.
15, Figure 15 is that the present invention the 2nd rubber cup, the 2nd rubber cup base combine front view.
16, Figure 16 is that the present invention the 2nd rubber cup, the 2nd rubber cup base combine right view.
17, Figure 17 is that the present invention the 2nd rubber cup, the 2nd rubber cup base combine rearview.
18, Figure 18 is that the C-C of Figure 17 is to sectional view.
19, Figure 19 is chassis of the present invention front view.
20, Figure 20 is chassis of the present invention right view.
21, Figure 21 is chassis of the present invention rearview.
22, Figure 22 is that the D-D of Figure 21 is to sectional view.
23, Figure 23 is that the present invention goes out liquid bolt front view.
24, Figure 24 is that the present invention goes out liquid bolt left view.
25, Figure 25 is that the E-E of Figure 24 is to sectional view.
26, Figure 26 is that the present invention goes out liquid bolt right view.
27, Figure 27 is the present invention the 2nd piston front view.
28, Figure 28 is that the F-F of Figure 27 is to sectional view.
29, Figure 29 is the present invention the 2nd piston left view.
30, Figure 30 is the present invention the 2nd piston right view.
31, Figure 31 is two brake pump pipeline connection diagrams of loader of the present invention.
Detailed description of the invention
Describe in detail with embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 7, brake pump of the present invention, including brake pump housing, in brake pump housing, it is provided with brake chamber, OK
Car brake chamber and stopping brake chamber, in the present embodiment, be provided with brake chamber in brake chamber housing 52.Service brake cavity is positioned at parking
The left side of brake chamber, brake chamber is positioned at the left side of service brake cavity;Described service brake cavity is provided with the 1st rubber cup 5, the 1st rubber
Service brake cavity is divided into service brake left chamber 33 and service brake air storage chamber 2 by rubber bowl 5, and service brake air storage chamber 2 is positioned at
The right side of service brake left chamber 33, service brake air storage chamber 2 is provided with service brake QI KOU 31;Stopping brake chamber is provided with the 1st and lives
Plug the 27, the 1st piston 27 can move left and right in stopping brake chamber, and the 1st piston 27 excircle is provided with sealing ring 26, the 1st piston 27
Stopping brake chamber is divided into stopping brake air storage chamber 1 and the right chamber of stopping brake 32, and stopping brake air storage chamber 1 is positioned at stopping brake
The left side of right chamber 32, stopping brake air storage chamber 1 is provided with on the left of stopping brake QI KOU the 30, the 1st piston 27 and is provided with the 1st push rod 4, the
The right side of 1 piston 27 is provided with main spring 3, described brake chamber be provided with liquid outlet channel 6, brake chamber is provided with the 2nd piston 57, and the 2nd lives
The left side of plug 57 is provided with the 1st back-moving spring 66, is provided with the 2nd push rod 64 on the left of the 1st rubber cup 5, and the 2nd push rod 64 is cased with auxiliary spring
74, the 2nd push rod 64 can promote the 2nd piston 57 to be moved to the left, and is fixed with push rod chassis on the left of the present embodiment the 1st rubber cup 5
8, the left side on push rod chassis 8 is fixed with the 2nd push rod 64;Brake chamber be arranged over out sap cavity 101, go out sap cavity 101 and brake chamber
Communicating, go out sap cavity 101 and be arranged over fluid reservoir 50, go out sap cavity 101 and be provided with the 1st control valve, the 1st control valve controls fluid reservoir 50
Inner chamber communicates with going out sap cavity 101 or closes.The right-hand member of brake pump housing is provided with screwed hole, and screwed hole is provided with the adjustment screw of adaptation
11, adjust screw 11 and can limit the position that the 1st piston 27 moves right.Brake chamber be provided with brake switch 55;Service brake
Left chamber 33 is provided with the 1st pneumostome 16, and the right chamber of stopping brake 32 is provided with the 2nd pneumostome 15.1st pneumostome 16 and big gas phase
Logical, it is simple to the movement in service brake cavity of the 1st rubber cup 5, the 2nd pneumostome 15 communicates with air, it is simple to the 1st piston 27 exists
The movement of stopping brake intracavity.
As shown in Fig. 6 to Figure 12, go out to be provided with between sap cavity 101 and brake chamber liquid passage 102 and fore-set guide through hole
103, the 1st control valve includes the 1st valve body 106, and the 1st valve body 106 is arranged over guide post 110, and the present embodiment guide post 110 is cone
Shape bar.Guide post 110 is cased with sealing gasket 107, is provided with the 1st control valve spring 87, fore-set guide through hole 103 below the 1st valve body 106
Equipped with fore-set 108, the top of fore-set 108 withstands on the outside of the 1st valve body 106 lower surface.The present embodiment is below the 1st valve body 106
The upper end of spring fixed column the 109, the 1st control valve spring 87 being provided with one is set with and is fixed on spring fixed column 109, fore-set
The top of 108 withstands on the off-centered outside of spring fixed column 109 lower surface.
As shown in Figure 27 and Figure 29, the centre of the 2nd piston 57 is provided with cannelure, and cannelure forms the 1st cylinder 93, annular
The left end of groove forms the 2nd cylinder 112, and the right-hand member of cannelure forms the 3rd cylinder 118, the 1st cylinder the 93 and the 2nd cylinder
Connected by round platform 111 transition between 112;When the 2nd piston 57 moves from left to right, the bottom of fore-set 108 is successively from the 1st cylinder
The surface of body 93, the surface of round platform 111, slide into the surface of the 2nd cylinder 112, fore-set 108 along fore-set guide through hole 103 by
Lower moves to eminence, thus the 1st valve body 106 is knocked over by fore-set 108, makes the 1st valve body 106 inclined, fluid reservoir 50
Inner chamber communicates with brake chamber by going out sap cavity 101;When the 2nd piston 57 moves from right to left, fore-set 108 bottom is successively from the 2nd
The surface of cylinder 112, the surface of round platform 111, slide into the surface of the 1st cylinder 93, and fore-set 108 is along fore-set guide through hole
103 descend movement, thus the 1st valve body 106 returns to normal sealed condition, make the inner chamber of fluid reservoir 50 and go out sap cavity
101 no longer communicate.
As is illustrated by figs. 11 and 12, going out sap cavity 101 and be provided with female thread, the lower section of fluid reservoir 50 is fluid reservoir base plate 114, storage
Flow container base plate 114 is provided with the 1st through hole 115, is provided with the 1st bolt in the lower section of the 1st through hole 115, above the 1st through hole 115
Being provided with the 2nd bolt, the 1st bolt includes the 1st bolt head the 105 and the 1st screw rod 117, and the 1st screw rod 117 is provided with external screw thread, the 1st
The center of bolt is provided with through tapped through hole the 113, the 1st bolt and is screwed in out on sap cavity 101 by the 1st screw rod 117, the 1st bolt
Head 105 is positioned at the top of sap cavity 101, and fluid reservoir base plate 114 is positioned at the top of the 1st bolt head 105;2nd bolt includes
2nd bolt head the 104 and the 2nd screw rod 116, the 2nd screw rod 116 is provided with external screw thread, and the center of the 2nd bolt is provided with through the 2nd and leads to
Hole 118, the 2nd screw rod 116 is screwed on the tapped through hole 113 of the 1st bolt through the 1st through hole 115, and the 2nd bolt head 104 is positioned at storage
The top of flow container base plate 114, fluid reservoir base plate 114 is fixed by the 1st bolt head the 105 and the 2nd bolt head 104.
As shown in Figure 13 to Figure 26, the left end of the 1st back-moving spring 66 is provided with chassis 68, the left end on chassis 68 and brake chamber
Inwall contacts, and liquid outlet channel 6 is provided with the 2nd control valve, and described 2nd control valve includes the 2nd rubber cup the 80, the 2nd rubber cup
Base the 78 and the 2nd control valve spring 70, the 2nd rubber cup 80 is positioned at the left side of the 2nd rubber cup base 78, the 2nd rubber peel
The right-hand member of bowl base 78 is provided with the 2nd control valve spring 70, the 2nd control valve spring 70 and chassis 68 Elastic Contact;Chassis 68 is provided with
Liquid-through hole 94;2nd rubber cup base 78 be circumferentially with the 2nd through hole 82, the center of the 2nd rubber cup 80 is provided with the 3rd through hole
81, the 2nd through hole 82 mutually staggers with the 3rd through hole 81.
The right side of the 2nd rubber cup base 78 is surrounded with the 1st spring location card article 83, a left side for the 2nd control valve spring 70
End is connected on the 1st spring location card article 83;The right side on chassis 68 is surrounded with the 2nd spring location card article 92, the 1st back-moving spring
The left end of 66 is connected on the 2nd spring location card article 92;Liquid outlet channel 6 is provided with female thread, liquid outlet channel 6 by its be provided with interior
Screw thread is screwed with out liquid bolt 72, and the right-hand member going out liquid bolt 72 is provided with boss 98, goes out liquid bolt 72 and is provided with through liquid outlet channel 76,
2nd rubber cup 80 is buckled on the right-hand member outward flange of boss 98.
As shown in Figure 27 to Figure 30, the left side of the 2nd piston 57 is provided with the 1st blind hole 91, and the right side of the 2nd piston 57 is provided with
2nd blind hole 92, the 1st cylinder 93 was provided with liquid passage 90, crosses liquid passage 90 and connects with the 1st blind hole 91;1st back-moving spring 66
Right side be positioned at the 1st blind hole 91 of the 2nd piston 57, the left side of the 2nd push rod 64 is positioned at the 2nd blind hole 92 of the 2nd piston 57,
The periphery of 3 cylinders 118 is provided with the sealing cannelure in more than 1 road, seals cannelure built with piston packing, the present embodiment
The periphery of the 3rd cylinder 118 is provided with two piston packings, is the 1st piston packing the 60, the 2nd piston packing 61 respectively.
As shown in figure 31, during use, stopping brake QI KOU 30 connects with the parking brake valve air gate 34 of parking brake valve 12, parking brake valve
The parking brake valve air inlet 35 of 12 connects with the gas receiver gas outlet 36 of gas receiver 14;The Foot braking valve air inlet of Foot braking valve 13
Mouth 37 connects with gas receiver gas outlet 36, and the Foot braking valve QI KOU 38 of Foot braking valve 13 connects with service brake QI KOU 31;
Liquid outlet channel 6 connects with braking clamp.
Embodiment of the present invention loader is respectively the 1st equipped with 2 described brake pumps and 4 braking clamps, 2 described brake pumps
Brake pump the 120 and the 2nd brake pump 130;Described loader is equipped with 4 braking clamps, the respectively the 1st braking clamp the 17, the 2nd braking clamp
18, the 3rd braking clamp the 42 and the 4th braking clamp 43, stopping brake QI KOU the 30 and the 2nd brake pump 130 that the 1st brake pump 120 is provided with sets
Some stopping brake QI KOU 30 all connect with the parking brake valve air gate 34 of parking brake valve 12, the parking brake valve air inlet of parking brake valve 12 35 with
The gas receiver gas outlet 36 of gas receiver 14 connects;Foot braking valve air inlet 37 and the gas receiver gas outlet 36 of Foot braking valve 13
Connection, the service brake QI KOU 31 and the 2nd that the Foot braking valve QI KOU 38 of Foot braking valve 13 and the 1st brake pump 120 are provided with is stopped
The service brake QI KOU 31 that car pump 130 is provided with connects;Liquid outlet channel the 6 and the 2nd braking clamp the 18, the 4th that 1st brake pump 120 is provided with
Braking clamp 43 connects, and the liquid outlet channel 6 that the 2nd brake pump 130 is provided with connects with the 1st braking clamp the 17, the 3rd braking clamp 42.
The present embodiment stopping brake QI KOU 30 is connected with the parking brake valve air gate 34 of parking brake valve 12 by the 1st pipeline 10, hands
The parking brake valve air inlet 35 of valve 12 stopped is connected with the gas receiver gas outlet 36 of gas receiver 14 by the 2nd pipeline the 25, the 3rd pipeline 24;
The Foot braking valve air inlet 37 of Foot braking valve 13 is connected with gas receiver gas outlet 36 by the 3rd pipeline 24, Foot braking valve
The pedal brake valve air gate 38 of 13 is connected with service brake QI KOU 31 by the 4th pipeline 9.When loader is driven a vehicle, operation is originally
Invention parking brake valve, makes stopping brake air storage chamber keep connecting with gas receiver.
Gases at high pressure (gases at high pressure are produced by air pump) in gas receiver 14 are managed by the 3rd pipeline 24, threeway the 95, the 2nd
Road 25, parking brake valve the 12, the 1st pipeline 10 enter the stopping brake air storage chamber 1 of the 1st brake pump the 120 and the 2nd brake pump 130, gas receiver
Interior gases at high pressure promote main spring to move right by the 1st piston 27, and the 1st rubber cup is in the resiliency urged of auxiliary spring 74
Under, drive the 2nd push rod 64 to move right;2nd piston 57 moves right under the resiliency urged of the 1st back-moving spring 66, the 2nd piston
On the left of in the of 57, brake-fluid pressure reduces, and then makes the braking clamp of connection release braking, makes braking clamp be in off position.Work as loading
When machine stops, operate parking brake valve of the present invention, make to be positioned at the gases at high pressure pressure release of stopping brake air storage chamber, utilize the elasticity of main spring
Reset, promote the 1st piston to be moved to the left, make the 1st push rod promote the 1st rubber cup, the 1st rubber cup to drive the 2nd push rod to the left
Mobile, the 2nd push rod promotes the 2nd piston to be moved to the left, so that on the left of the 2nd piston, brake-fluid pressure increases in brake chamber, and then
The braking clamp making connection is braked, and makes braking clamp in running order.
Gases at high pressure (gases at high pressure are produced by air pump) in gas receiver 14 are by the 3rd pipeline 24, threeway 95, foot-operated system
Dynamic valve the 13, the 2nd pipeline 9 enters the service brake air storage chamber 2 of the 1st loader brake pump the 120 and the 2nd loader brake pump 130.
The unspecified content of the present invention is prior art, and those skilled in the art can be from the present embodiment and existing
Technology obtains and inspires, and carries out deformation and obtains other embodiments.Therefore, protection scope of the present invention should be according to the guarantor of claim
The scope of protecting determines.