CN201802789U - Totally closed multi-disc wet brake device - Google Patents

Totally closed multi-disc wet brake device Download PDF

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Publication number
CN201802789U
CN201802789U CN2010205324837U CN201020532483U CN201802789U CN 201802789 U CN201802789 U CN 201802789U CN 2010205324837 U CN2010205324837 U CN 2010205324837U CN 201020532483 U CN201020532483 U CN 201020532483U CN 201802789 U CN201802789 U CN 201802789U
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CN
China
Prior art keywords
hydraulic
spring
brake
valve
piston
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
Application number
CN2010205324837U
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Chinese (zh)
Inventor
高梦熊
赵金元
万信群
刘惠龙
王兴勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SINOSTEEL HENGYANG MACHINERY CO Ltd
Original Assignee
SINOSTEEL HENGYANG MACHINERY CO Ltd
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Priority to CN2010205324837U priority Critical patent/CN201802789U/en
Application granted granted Critical
Publication of CN201802789U publication Critical patent/CN201802789U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a totally closed multi-disc wet brake device, which comprises a hydraulic control system and a brake. The brake includes a shell cylinder, a single piston and a friction sheet, wherein the single piston is positioned in the shell cylinder while one end of the single piston acts on the friction sheet, the other end of the single piston is provided with a spring hole for mounting an assistant brake spring, and a braking hydraulic chamber and a release hydraulic chamber are formed between the single piston and the inner wall of the shell cylinder. The hydraulic control system includes a hydraulic reversing valve and a reverse brake valve, wherein the release hydraulic chamber is connected with an outlet of the reverse brake valve and a pilot hole of the hydraulic reversing valve, and the braking hydraulic chamber is communicated with one hole of the hydraulic reversing valve. The totally closed multi-disc wet brake device overcomes shortages in the prior art, and has the advantages of fine safety and reliability, simple structure, low price, energy conservation, long service life and the like.

Description

Enclosed multi-disc wet type braking device
Technical field
The utility model relates to a kind of enclosed multi-disc wet type braking device.
Background technique
At present, enclosed multi-disc wet type braking device is used very extensive, particularly on underground trackless mining equipment, it mainly is made up of a hydraulic control system and a break, then includes movable friction plate, static friction sheet, piston, pressure spring and exterior cylinder in the break.In when running, this device mainly be by the control hydraulic control system to break inner carrier oil pocket fuel feeding or draining, promote piston and compress or unclamp dynamic and static friction plate, thus realization vehicle braked or travel.
According to the application of force difference of piston to dynamic and static friction plate, this braking device mainly is divided into hydraulic braking, spring unclamps or two kinds of forms of spring braking, hydraulic unlock, wherein: mostly the former is to adopt the piston of big annular, the inwall of its piston and exterior cylinder forms single hydraulic pressure cavity, single hydraulic pressure cavity is communicated to the oil circuit of hydraulic control system, piston action is in dynamic and static friction plate, and pressure spring is installed in the exterior cylinder and is supporting piston.During braking, depress brake petal, pressurization and further compression pressure spring in the piston cavity, thereby the thrust that piston produces compresses movable friction plate and static friction sheet and produces frictional force, when lifting brake petal, and release in the piston cavity, pressure spring recovers distortion, piston is compressed spring and pushes back, and movable friction plate is separated with the static friction sheet, removes the braking to wheel.In order to guarantee safety, the hydraulic control system that this form adopts must be designed to propons and the independently two separately hydraulic brake circuits of back axle; Also must dispose the parking brake and the control corresponding mechanism of spring braking, hydraulic unlock in addition, complex structure can't be realized braking to vehicle when hydraulic system breaks down, bring hidden danger to driving; The latter then comprises movable friction plate, static friction sheet, exterior cylinder, piston, pressure spring and push-plate, and push-plate acts on dynamic and static friction plate, and pressure spring heads on push-plate, and piston and exterior cylinder form single chamber delivery piston, and single chamber delivery piston is connecting push-plate.During use, depress brake petal, make single chamber release of piston, pressure spring promotes push-plate compresses movable friction plate and static friction sheet, thereby generation frictional force makes vehicle deceleration or braking, when pressurize in piston list chamber, single chamber delivery piston promotes push-plate makes movable friction plate separate with the static friction sheet, removes the braking to wheel.Though there are not the problems referred to above in this kind break, if its power system and hydraulic braking sytem break down, after vehicle was braked, if want moving vehicle, vehicle must dispose the pump that manually declutches.But along with the use of break, piston packing constantly weares and teares, thereby oily amount of leakage is increased, when oil leakage quantity to a certain degree, it is very difficult that the hand oil pump release brake becomes, even lost efficacy.Along with dynamic and static friction plate uses for a long time, the attenuation gradually of its thickness, the compressed length of spring reduces, thereby the active force that acts between the dynamic and static friction plate is reduced, braking moment reduces, brake performance descends, and in order to guarantee the unlikely vehicle safety that jeopardizes of brake performance decline, break must dispose wear indicator.Because it adopts spring braking, not only braking is not steady, spring often is subjected to the effect of alternating stress, easily produce fatigue ruption, and the spring force that needs is very big, number of springs is also many, generally more than 16, performance, precision and workmanship requirement to spring are all very high, thereby complex structure, cost an arm and a leg.
At above-mentioned two kinds of existing problems of braking device, publication number is that the Chinese utility model patent of CN2366609Y has been introduced a kind of braking device that comprises a service brake piston and a parking braking piston.Wherein service brake piston and parking braking piston are two big pistons, they are installed in the two ends of friction plate respectively, be all the oil-feed of single chamber, one end of pressure spring is supporting the parking braking piston, this braking device adopts two kinds of modes of braking, adopt hydraulic braking during service brake, when breaking down, hydraulic system adopts braking in the pressing spring, guarantee vehicle driving and Parking safety, during driving, advance pressure oil in the oil pocket of parking braking piston and reach rating value, pressure spring is pushed back, make pressure spring be in most compressed state; When depressing pedal, pressurization in the service brake piston oil pocket, thereby this piston produces thrust makes movable friction plate and static friction sheet compress generation frictional force, form friction torque and make wheel braking, when lifting brake petal, release in the service brake piston oil pocket, this piston returns, movable friction plate separates with the static friction sheet, releasing is to wheel braking, when hydraulic system fault did not have pressure or stops, the oil pocket internal pressure oil of parking braking piston was laid down, and produced frictional force thereby the thrust of pressure spring compresses movable friction plate and static friction sheet.Owing to take the form of this double-piston braking, cause this braking device volume ratio bigger; And service brake piston and parking braking piston respectively have an independently hydraulic control system, adopt different oil circuit control respectively, complex structure.Because double-action break stopping brake adopts spring force, hydraulic braking is adopted in service brake, two kinds of energy is independent action separately, for vehicle is fully braked, spring is had relatively high expectations, and the hydraulic pressure that requires is big, energy consumption is bigger, owing to lack auxiliary braking, when power or hydraulic system break down, there is certain security risk.
The model utility content
The purpose of this utility model is to provide a kind of good braking effect, enclosed multi-disc wet type braking device safe and reliable, simple in structure.
This enclosed multi-disc wet type braking device that the utility model provides, comprise a hydraulic control system and a break, described break comprises exterior cylinder, single piston, friction plate, single piston is arranged in exterior cylinder and an end acts on friction plate, described single piston the other end has spring eye and is used to install the power brake spring, and should the list piston and the inwall of exterior cylinder between form two hydraulic chamber, one is the brake fluid pressure chamber, another is the hydraulic chamber that declutches, described hydraulic control system comprises pilot operated directional control valve and plugging valve, the hydraulic chamber that declutches links to each other with the outlet of plugging valve and the pilot hole of pilot operated directional control valve, and the brake fluid pressure chamber communicates with the position, a hole of pilot operated directional control valve.
Described pilot operated directional control valve adopts two-position three way leading type pilot operated directional control valve.
Total 4-6 of spring eye is distributed on the same circumference.
Contain accumulator and hand oil pump in the described hydraulic control system.
Described power brake spring adopts the rectangle spring.
The utility model braking device is owing to be provided with two independently hydraulic chamber, and be provided with the power brake spring, therefore when braking, not only there is hydraulic power to also have spring powered to brake, the two has formed makes a concerted effort, good braking effect is under normal circumstances arranged on the one hand, can make the corresponding minimizing of hydraulic power on the other hand, guaranteeing the hydraulic system good sealing property, thereby improve working life of system and energy-conservation.Under improper situation, one of them is out of joint such as hydraulic system or power system, and this device still can play the auxiliary braking effect, can effectively prevent the generation of burst accident.Therefore the safety and reliability of the utility model braking device are very good, and volume is little, and price is lower, and is applied widely, simple in structure.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
As can be seen from Figure 1, the utility model comprises break and hydraulic control system two-part, wherein break comprises exterior cylinder 1, single piston 2, friction plate 3, power brake spring 5, exterior cylinder 1 comprises the left cap 11 that connects successively, middle shell 12, right cap 13, in left cap 11, be provided with annular groove 14, the right-hand member of middle shell 12 has through hole 15, single piston 2 adopts big annular piston, its left end is inserted in the annular groove 14 of left cap, the through hole 15 that right-hand member passes middle shell 12 acts on the friction plate 3, and and the inwall of left cap 11 and middle shell 12 between form a hydraulic pressure cavity, on single piston 2, be provided with the outer shoulder 21 of annular, take on 21 outward this hydraulic pressure cavity is divided into two independent cavity---the brake fluid pressure chamber 6 and the hydraulic chamber 7 that declutches.Being uniformly distributed along the circumference at single piston 2 left ends has 4-6 spring eyes 4, corresponding power brake springs 5 that are equipped with in each spring eye 4, and power brake spring 5 is selected the rectangle spring for use.
Friction plate 3 comprises some movable friction plates 31 and some static friction sheets 32, they are installed in the right cap 13, static friction sheet 32 is meshed with right cap 13 internal splines by external splines, movable friction plate 31 is meshed with the external splines of wheel hub by internal spline, make and to do relative moving between each movable friction plate 31 and each static friction sheet 32, unclamp each other or compress, when unclamping, vehicle can be exercised; When compressing, vehicle is braked.
It can also be seen that from Fig. 1, hydraulic control system of the present utility model comprises above-mentioned break and filter 81, oil hydraulic pump 82, liquid-filling valve 83, pilot operated directional control valve 84, plugging valve 85, accumulator 87 and hand oil pump, wherein pilot operated directional control valve 84 adopts two-position three way leading type pilot operated directional control valve, the filler opening of filter 81 is connected in the fuel tank, the filler opening of oil hydraulic pump 82 and oil outlet are connected to the oil outlet of filter 81 and the filler opening of liquid-filling valve 83 respectively, on the oil outlet of the P1 mouth of hydraulicchange-over valve 84 and the parallel connection of the P2 mouth of plugging valve 85 difference and series connection liquid-filling valve 83, the D mouth of pilot operated directional control valve 84 is communicated with brake fluid pressure chamber 6, the hydraulic chamber 7 that declutches is communicated with the C mouth of plugging valve 85 and the pilot hole K1 of pilot operated directional control valve 84, accumulator 87 is located on the branch's oil circuit that is connected with the oil outlet of liquid-filling valve 83 with hand oil pump, can make hydraulic system still preserve certain pressure when power system or hydraulic system break down.
In order to make the safety in controlled system of the utility model or loop, between oil hydraulic pump 82 and liquid-filling valve 83, be provided with a branch's oil circuit that is connected with relief valve 86.
For the utility model is crossed when low to giving the alarm at retardation pressure, between liquid-filling valve 83 and pilot operated directional control valve 84 and plugging valve 85, be provided with a branch's oil circuit that is connected with pressure relay 88.
The utility model is when being used for driving cycle, behind the vehicle launch, when the brake valve pedal is not depressed, pressure oil enters into liquid-filling valve 83 through oil hydraulic pump 82, the hydraulic oil of liquid-filling valve 83 flow to the P2 mouth of plugging valve 85 again, flow to the hydraulic chamber 7 that declutches of break from the C mouth of plugging valve 85, meanwhile, the part of the high pressure oil of the C mouth output of plugging valve 85 enters into the control mouth K1 of hydraulicchange-over valve 84, make spool be in shown position, part oil enters the hydraulic chamber 7 that declutches, and promotes single piston left lateral; Hydraulic oil in the brake fluid pressure chamber 6 flows back to fuel tank through the position, a left side of hydraulicchange-over valve 84 D mouth simultaneously, and movable friction plate 31 and static friction sheet 32 are unclamped, and break declutches, but the vehicle cruising.
When the utility model is used for damped condition, depress brake pedal, the spool of plugging valve 85 moves to F, the hydraulic chamber's 7 interior hydraulic oil that declutch flow back to fuel tank through plugging valve 85 the next C mouths, simultaneously the control mouth K1 of hydraulicchange-over valve 84 also flows back to fuel tank to the hydraulic oil on the oil circuit of plugging valve 85, the spool of hydraulicchange-over valve 84 moves to left under the spring force effect, the right position of hydraulicchange-over valve 84 is inserted, pressure oil enters the D mouth of the right position of this selector valve through the P1 of hydraulicchange-over valve 84 mouth, flow to again in the brake fluid pressure chamber 6, hydraulic coupling promotes single piston 2 right laterals, and power brake spring 5 recovers distortion and also promotes single piston right lateral, the braking of making a concerted effort under spring force and hydraulic coupling acting in conjunction, movable friction plate 31 is combined with static friction sheet 32, produce friction torque, vehicle slows down rapidly or stops, good braking effect.
When the utility model was used for the decompression operating mode, when oil hydraulic pump or hydraulic control system break down, but the accumulator 87 of hydraulic control system was still preserved certain pressure, the same damped condition of its braking principle.As do not have pressure or pressure is very low, and 2 in then single piston produces braking under the effect of power brake spring 5, because acting force of the spring is by the design of auxiliary brake braking force, but therefore still safety brake.
When the utility model is used for the Parking operating mode, depress foot brake valve pedal, and utilize the tight mechanism of plugging block of valve locking pedal at depressing position, the lower end that plugging valve 85 remains is inserted, and the pressure oils that break declutches in the hydraulic chamber 7 flow back to fuel tank through the C mouth of plugging valve 85 right positions all the time, and 2 in single piston is under the effect of power brake spring 5, produce braking, vehicle remains vehicle stop state, if discharge locking mechanism, then vehicle could recover normal state.
When the utility model is used to pull operating mode, when oil hydraulic pump 82 or hydraulic control system break down, vehicle is braked the scene of being parked in, in order to drag vehicle between maintenance or to drag the scene away from, can utilize accumulator 87 oil pressure of hydraulic control system to open parking brake, if the accumulator oil pressure is not enough, can be by hand oil pump toward declutch feeding pressure oil in the hydraulic chamber 7 of break, because the power brake number of springs is few, the power that declutches is also little, declutches easily, after pressure oil makes it to declutch, vehicle just can be dragged, and also can utilize quick release coupling, and external power source declutches brake valve.

Claims (5)

1. enclosed multi-disc wet type braking device, comprise a hydraulic control system and a break, described break comprises exterior cylinder (1), single piston (2), friction plate (3), single piston (2) is arranged in exterior cylinder (1) and an end acts on friction plate (3), it is characterized in that described single piston the other end has spring eye (4) and is used to install power brake spring (5), and should the list piston and the inwall of exterior cylinder between form two hydraulic chamber, one is brake fluid pressure chamber (6), another is the hydraulic chamber (7) that declutches, described hydraulic control system comprises pilot operated directional control valve (84) and plugging valve (85), the hydraulic chamber (7) that declutches links to each other with the outlet (C) of plugging valve and the pilot hole (K1) of pilot operated directional control valve (84), and brake fluid pressure chamber (6) communicates with the position, a hole (D) of pilot operated directional control valve.
2. enclosed multi-disc wet type braking device according to claim 1 is characterized in that described pilot operated directional control valve (84) adopts two-position three way leading type pilot operated directional control valve.
3. enclosed multi-disc wet type braking device according to claim 1 and 2 is characterized in that total 4-6 of spring eye (4), is distributed on the same circumference.
4. enclosed multi-disc wet type braking device according to claim 1 and 2 is characterized in that containing in the described hydraulic control system accumulator (87) and hand oil pump.
5. enclosed multi-disc wet type braking device according to claim 3 is characterized in that described power brake spring (5) adopts the rectangle spring.
CN2010205324837U 2010-09-17 2010-09-17 Totally closed multi-disc wet brake device Expired - Fee Related CN201802789U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205324837U CN201802789U (en) 2010-09-17 2010-09-17 Totally closed multi-disc wet brake device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205324837U CN201802789U (en) 2010-09-17 2010-09-17 Totally closed multi-disc wet brake device

Publications (1)

Publication Number Publication Date
CN201802789U true CN201802789U (en) 2011-04-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010205324837U Expired - Fee Related CN201802789U (en) 2010-09-17 2010-09-17 Totally closed multi-disc wet brake device

Country Status (1)

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CN (1) CN201802789U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101922524A (en) * 2010-09-17 2010-12-22 中钢集团衡阳重机有限公司 Enclosed multi-disc wet type braking device
CN106458186A (en) * 2014-06-17 2017-02-22 罗伯特·博世有限公司 Electronically slip-controllable vehicle brake system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101922524A (en) * 2010-09-17 2010-12-22 中钢集团衡阳重机有限公司 Enclosed multi-disc wet type braking device
CN106458186A (en) * 2014-06-17 2017-02-22 罗伯特·博世有限公司 Electronically slip-controllable vehicle brake system
CN106458186B (en) * 2014-06-17 2020-05-12 罗伯特·博世有限公司 Vehicle braking system with electronic anti-skid control function

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110420

Termination date: 20150917

EXPY Termination of patent right or utility model