CN201058603Y - Loader hydraulic wet braking system - Google Patents
Loader hydraulic wet braking system Download PDFInfo
- Publication number
- CN201058603Y CN201058603Y CNU200720080013XU CN200720080013U CN201058603Y CN 201058603 Y CN201058603 Y CN 201058603Y CN U200720080013X U CNU200720080013X U CN U200720080013XU CN 200720080013 U CN200720080013 U CN 200720080013U CN 201058603 Y CN201058603 Y CN 201058603Y
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- Prior art keywords
- oil
- valve
- brake
- hydraulic pressure
- loader
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- 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
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- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims description 13
- 230000004913 activation Effects 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 210000002105 tongue Anatomy 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 52
- 230000009471 action Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model relates to a hydraulic pressure wet type brake system for loader, which comprises a main pipe, pressure oil can be extracted from hydraulic pressure steering system for loader, a pedal brake valve is arranged at the main pipe, four branch pipes that are connected with the main pipe are respectively communicated with four piston type cylinders on front and rear axles, four brake mechanism are controlled by piston movement, and wheel rim reducer shell is arranged on the axle body by bearing, the brake mechanism is as follows: the brake shell is connected fixedly with the wheel rim reducer shell, the cylinder is arranged on inner wall of the brake shell via oil seal, a reset spring is arranged on the piston in the cylinder, a driven plate and a driving plate are alternately arranged on travel position of the inner piston in the brake shell a rotary gap is provided between the driven plate and the driving plate. The utility model has the advantages of stable brake performance, reliance, safety, and reasonable brake function.
Description
Technical field
The utility model relates to the brake of motor-driven vehicle device, especially the loader fluid brake.
Background technology
Existing loader generally adopts pneumatic braking system, utilizes compressed air, drives the disc type braking mechanism, realizes braking.In actual the use, find that this pneumatic braking system exists some problems and shortcoming: 1, braking effect is poor.On the one hand because aerobraking power is big inadequately; On the other hand, rely on the interlock braking of two brake parts of disk type brake mechanism, under the big situation of loader load, braking effect is relatively poor; 2, deceleration and stopping performance instability is a power owing to adopt pressurized air, and under the situation of air pump inflate quantity fluctuation, compressed-air actuated pressure is non-constant, thereby, be difficult to form stable deceleration and stopping performance; The disk type brake parts are big to component wear in frequent braking, and easily produce high temperature and cause brake part short service life, the fault rate height.
At the problems referred to above, the inventor has developed " loader hydraulic brake system " (ZL200520036461.0).It utilizes the hydraulic oil of loader itself to be propulsion source, during drag, by pressure oil piston is moved, piston makes as a plurality of driven discs and the rotating plate of brake facing and fits mutually, utilize the friction force between the brake facing, prevent drive shaft turns, realize brake operation.The effect that reached finally that the braking quality sense is stable, braking effect is reliable, brake part prolongs service life.But also there is the problem that structure is complicated, maturation is owed in design in technique scheme.
The utility model content
This later-model purpose provide a kind of improve structure, the better loader hydraulic pressure of braking effect wet brake system.
This later-model purpose is realized by following design: a kind of loader hydraulic pressure wet brake system, comprise the house steward who draws pressure oil from the loader hydrostatic steering system, be installed in the pedal brake valve on the house steward, article four, branched pipe respectively with loader before, four ram cylinders on the back axle are communicated with, four braking mechanisms by above-mentioned piston motion control, and through the wheel reduction gear housing of bearing installation on pontic, braking mechanism is: braking housing and described wheel reduction gear housing connect firmly, oil cylinder is installed in the braking inner walls through oil sealing, be positioned at in-oil cylinder piston and be provided with retracing spring, in the braking housing, alternately be provided with driven disc and rotating plate on the travel position of piston one by one, driven disc is connected with pontic through its upper spline, uniform a plurality of block tongues are fastened in the draw-in groove of braking on the housing on the rotating plate, and between driven disc and the rotating plate running clearance are arranged.
Above-mentioned pedal brake valve arrangement is: two oil outlets that valve body is provided with oil inlet and is communicated with the ram cylinder of back axle and propons respectively, and one of them oil outlet and oil inlet are positioned at same vertical height, another oil outlet is positioned at the below of this oil outlet, the spool that when moving down oil inlet is communicated with two oil outlets is arranged in the valve body, stretcher is hinged on the valve body, and pull back spring is arranged between spool and the valve body base plate; Two oil outlets of brake activation valve are communicated with cylinder ports on back axle, the propons through two pipelines respectively.
This later-model principle of work is to utilize pressure oil that the pressure oil of the hydraulic efficiency pressure system of loader itself particularly draws from steering swivel system as propulsion source, drives braking mechanism action realization braking brake.This braking mechanism adopts rotating plate and driven disc as brake facing, relies on the friction force between the brake facing to realize braking.Working process is as follows: step on stretcher, brake activation valve is opened, two oil outlets of pressure oil from the valve body flow out, when spool is descending, the position last oil outlet than the position under oil outlet fuel-displaced in advance, be that pressure oil acts on the piston in the back axle upper cylinder earlier, after act on piston in the propons upper cylinder, net result is that the trailing wheel on the back axle is braked prior to front-wheel on the propons, like this, brake action is more reliable, safer, more reasonable.Pressure oil enters oil cylinder through oil inlet, the promotion piston moves, the piston compressing is positioned at first driven disc of fwd, make between driven disc and the rotating plate and fit tightly, owing to driven disc is a static element to spend strong form to be fixed on the pontic, and rotating plate is connected with wheel reduction gear housing (installation tire) in a plurality of block tongues (as 12) mode, can move axially and the semiaxis rotation, therefore, rely on the friction force between the brake facing and finally make the wheel reduction gear housing, that is to say trailing wheel and front-wheel are stopped operating, produce brake action.
Compared with prior art, this novelly has following characteristics and an advantage:
1, braking quality is stable, and braking effect is reliable, and brake action is more reasonable
Because adopt the pressure oil of the hydraulic efficiency pressure system of loader self to adopt hydraulic braking, the braking force that pressure oil provides is enough big, as 1.5Mpa, therefore, deceleration and stopping performance is stable, and braking effect is reliable; Simultaneously, owing to adopt a plurality of driven discs and rotating plate as brake part, active area each other is big, and the friction force of generation is very big, has strengthened the drag performance.Because loader is a four wheel drive, during brake, breaking force acts on trailing wheel earlier, and then remakes to be used for front-wheel, like this, compares front and rear wheel brake mode simultaneously, and the effect of this drag is safer, more reasonable.
2, reduce the maintenance cost, reduce the brake machinery fault rate.
Brake control power comes from the friction force between rotating plate and the driven disc, thereby, as the wearing and tearing of the rotating plate of brake part and driven disc seldom; Secondly, the wearing and tearing in the use between rotating plate and driven disc only cause the minimizing of rotating plate and driven disc thickness, and its rubbing effect face still remains unchanged, therefore, and the longer service life of brake part.Compare with existing aerodynamic brake mechanism, this novel maintenance work that reduces braking mechanism has reduced use cost.
3, designs simplification, it is more reasonable to design.
Oil cylinder is mounted on the braking housing through oil sealing, and oil cylinder is between braking housing and pontic, and like this, designs simplification is convenient to oil cylinder and is installed, and has cancelled original brake tooth, makes structure more reasonable.
Description of drawings
Fig. 1 is the structural representation of this new type hydraulic system;
Fig. 2 is the constructional drawing of stop mechanism shown in Figure 1;
Fig. 3 Fig. 4 is respectively the front view of driven disc shown in Figure 2 and rotating plate;
Fig. 5 is the scheme drawing of decorative pattern shape groove on the rotating plate shown in Figure 4;
Fig. 6 is the constructional drawing of by pass valve shown in Figure 1;
Fig. 7 is the constructional drawing of check valve shown in Figure 1 and accumulator;
Fig. 8 is the constructional drawing of brake activation valve shown in Figure 1.
The specific embodiment
Fig. 1 illustrates, and pressure oil is from the oil circuit house steward of steering pump to steering swivel system, and branch draws through threeway, draws 1/3～1/4 bore that arm is about house steward.Pressure oil is at first through being installed in the by pass valve 1 on the house steward 5 in turn, through in four branched pipes flow into four stop mechanisms on propons 7 and the back axle 8 (on the forward and backward bridge each two) again behind check valve 2, accumulator 3, the pedal brake valve 4, produces brake action again.The return opening of above-mentioned by pass valve and brake activation valve all is communicated with hydraulic reservoir 6 by the road.
Referring to Fig. 2, wheel reduction gear housing 19 is installed on the pontic 10 through bearing 17 (taper bearing), and transmission shaft 9 (being semiaxis) connects firmly with the wheel reduction gear housing, drives its rotation, and wheel rim screw 18 is used to install and fix tire and uses.Braking mechanism is: braking housing 16 connects firmly with wheel reduction gear housing 19, oil cylinder 11 is installed in braking housing 16 inwalls through oil sealing 13 and through screw retention, the piston 12 that is positioned at oil cylinder 11 is provided with retracing spring 14, retracing spring is between piston and cover plate 15, in the braking housing, alternately be provided with driven disc 20 and rotating plate 21 on the travel position of piston one by one, driven disc is connected with pontic 10 through its upper spline, uniform a plurality of block tongue 21b are fastened in the draw-in groove of braking on the housing 16 on the rotating plate, the shape of draw-in groove is similar to block tongue, the two bearing fit.Running clearance is all arranged between driven disc and the rotating plate.The direction that arrow indicated pressure oil enters oil cylinder among Fig. 2.Oil cylinder 11 is between pontic 10 and braking housing 16.Uniform on circumference as 12 retracing springs 14.Referring to Fig. 3 Fig. 4, the surface of rotating plate 21 is provided with decorative pattern shape groove 21a.The surface of steel plate of rotating plate 21 has had the copper composite bed of wear-resisting effect, and promptly copper sheet is set in surface of steel plate.Rotating plate 21 is 4, and driven disc 20 is 5, and the block tongue on the rotating plate can be 12.Running clearance between rotating plate and the driven disc is between the 30-50 silk.Groove on the rotating plate (referring to Fig. 5) is used for increasing friction and storage lubricating oil, is used for radiating and cooling.
Fig. 8 illustrates, the structure of pedal brake valve is: two oil outlet 4e, 4f that valve body 4b is provided with oil inlet (left side arrow illustrates the oil-feed direction) and is communicated with the ram cylinder of back axle 8 and propons 7 respectively, and oil outlet 4e and oil inlet are positioned at same vertical height, oil outlet 4f is positioned at the below of oil outlet 4e, when moving down, the spool 4c that oil inlet is communicated with two oil outlets is arranged in the valve body 4b, stretcher 4a is hinged on the valve body, and pull back spring 4d is arranged between spool 4c and the valve body base plate; 5b, 5a are communicated with oil cylinder on back axle 8, the propons 7 by the road respectively for brake activation valve two oil outlet 4e, 4f.
Fig. 7 illustrates, and check valve 2 and accumulator 3 are installed on the house steward 5 in turn, and accumulator 3 structures are: piston 3b places in the housing 3a, spring 3c is arranged between piston and the housing top board, housing bottom is provided with the oil-feed tube coupling, and case top has deflation hole 3d, and deflation hole 3d is provided with check (non-return) valve.The oil outlet of check valve 2 is provided with screw pipe coupling, and this tube coupling is screwed on the accumulator 3 housing bottom oil-feed tube couplings, i.e. the conjuncted setting of check valve and accumulator.One-way valve structures is: spool 2a is positioned at valve body 2c, and spring 2b is arranged on the spool and the body of rod (right side among Fig. 7), and spring makes the spool shutoff in tapered opening.
Fig. 6 illustrates, and check valve 2 fronts also are equipped with by pass valve 1 on the house steward 5: valve body is provided with oil-feed, oil discharge passage and drainback passage, by the sliding valve core 1a shutoff of spring 1b effect on the joint of oil inlet passage and drainback passage.Nut 1c is screwed on the valve body, and spring 1b is arranged between nut 1c and the sliding valve core 1a.Return opening 1d is arranged on the valve body.The return opening 4g of the drainback passage of by pass valve 1 and brake activation valve 4 bottoms all is communicated with hydraulic reservoir 6.
Claims (10)
1. loader hydraulic pressure wet brake system, comprise the house steward (5) who draws pressure oil from the loader hydrostatic steering system, be installed in the pedal brake valve on the house steward, article four, branched pipe respectively with loader before, back axle (7,8) four ram cylinders (11) on are communicated with, four braking mechanisms by above-mentioned piston motion control, and be installed in wheel reduction gear housing (19) on the pontic (10) through bearing (17), it is characterized in that: described braking mechanism is: braking housing (16) connects firmly with described wheel reduction gear housing (19), oil cylinder (11) is installed in braking housing (16) inwall through oil sealing (13), the piston (12) that is positioned at oil cylinder (11) is provided with retracing spring (14), in the braking housing, alternately be provided with driven disc (20) and rotating plate (21) on the travel position of piston one by one, driven disc is connected with pontic (10) through its upper spline, uniform a plurality of block tongues (21b) are fastened in the draw-in groove of braking on the housing (16) on the rotating plate, and between driven disc and the rotating plate running clearance are arranged.
2. loader hydraulic pressure wet brake system according to claim 1, it is characterized in that: the structure of described pedal brake valve is: two oil outlet (4e that valve body (4b) is provided with oil inlet and is communicated with the ram cylinder of back axle (8) and propons (7) respectively, 4f), and oil outlet (4e) is positioned at same vertical height with oil inlet, oil outlet (4f) is positioned at the below of oil outlet (4e), the spool (4c) that when moving down oil inlet is communicated with two oil outlets is arranged in the valve body (4b), stretcher (4a) is hinged on the valve body, and pull back spring (4d) is arranged between spool (4c) and the valve body base plate; Two oil outlets of brake activation valve (4e, 4f) respectively by the road (5b, 5a) be communicated with oil cylinder on back axle (8), the propons (7).
3. loader hydraulic pressure wet brake system as claimed in claim 1 or 2, it is characterized in that: the surface of described rotating plate (21) is provided with decorative pattern shape groove (21a).
4. as loader hydraulic pressure wet brake system as described in the claim 3, it is characterized in that: the surface of steel plate of described rotating plate (21) has had the copper composite bed of wear-resisting effect.
5. as loader hydraulic pressure wet brake system as described in the claim 4, it is characterized in that: described rotating plate (21) is 4, and driven disc (20) is 5, and the block tongue on the rotating plate is 12.
6. as loader hydraulic pressure wet brake system as described in the claim 5, it is characterized in that: check valve (2) and accumulator (3) are installed on the described house steward (5) in turn, accumulator (3) structure is: piston (3b) places in the housing (3a), spring (3c) is arranged between piston and the housing top board, housing bottom is provided with the oil-feed tube coupling, case top has deflation hole (3d), and deflation hole (3d) is provided with check (non-return) valve.
7. as loader hydraulic pressure wet brake system as described in the claim 6, it is characterized in that: the oil outlet of described check valve (2) is provided with screw pipe coupling, and this tube coupling is screwed on accumulator (3) the housing bottom oil-feed tube coupling.
8. as loader hydraulic pressure wet brake system as described in the claim 7, it is characterized in that: described house steward (5) goes up check valve (2) front by pass valve (1) also is installed: valve body is provided with oil-feed, oil discharge passage and drainback passage, by sliding valve core (1a) shutoff of spring (1b) effect on the change meeting point of oil inlet passage and drainback passage.
9. as loader hydraulic pressure wet brake system as described in the claim 8, it is characterized in that: valve body (4b) bottom of described brake activation valve (4) has return opening (4g).
10. as loader hydraulic pressure wet brake system as described in the claim 9, it is characterized in that: also have hydraulic reservoir (6); The return opening (4g) of the drainback passage of described by pass valve (1) and brake activation valve (4) all is communicated with hydraulic reservoir (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720080013XU CN201058603Y (en) | 2007-06-22 | 2007-06-22 | Loader hydraulic wet braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720080013XU CN201058603Y (en) | 2007-06-22 | 2007-06-22 | Loader hydraulic wet braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201058603Y true CN201058603Y (en) | 2008-05-14 |
Family
ID=39407060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720080013XU Expired - Fee Related CN201058603Y (en) | 2007-06-22 | 2007-06-22 | Loader hydraulic wet braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201058603Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874233A (en) * | 2012-10-08 | 2013-01-16 | 广西柳工机械股份有限公司 | Wheel-side oil seal temperature reducing device for loader driving axle |
| CN102975579A (en) * | 2011-09-06 | 2013-03-20 | 日立建机株式会社 | Travel drive device for dump truck |
| CN103557247A (en) * | 2013-11-13 | 2014-02-05 | 株洲市九洲传动机械设备有限公司 | Normally open type built-in brake structure of speed reducer |
| CN103883645A (en) * | 2014-04-13 | 2014-06-25 | 福建亚南电机有限公司 | Disengaging spring friction reducing system device of full electric vehicle connection axle two-gear speed changing box |
| CN105313854A (en) * | 2014-08-01 | 2016-02-10 | 绩溪县徽洋车桥有限责任公司 | Hydraulic steering wet brake front axle |
| CN105650147A (en) * | 2015-02-04 | 2016-06-08 | 湖北康晨安宝矿业设备有限责任公司 | Hydraulic brake device |
| CN107806482A (en) * | 2017-11-20 | 2018-03-16 | 清华大学苏州汽车研究院（相城） | A kind of drawing sheet brake system for eliminating mechanical hysteresis |
| CN108730375A (en) * | 2018-05-31 | 2018-11-02 | 盛瑞传动股份有限公司 | Brake and speed changer |
| CN113757273A (en) * | 2021-08-20 | 2021-12-07 | 北京工业大学 | Multi-piece friction-hydraulic composite brake support bridge |
-
2007
- 2007-06-22 CN CNU200720080013XU patent/CN201058603Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975579A (en) * | 2011-09-06 | 2013-03-20 | 日立建机株式会社 | Travel drive device for dump truck |
| CN102975579B (en) * | 2011-09-06 | 2016-04-27 | 日立建机株式会社 | The running driving device of tip car |
| CN102874233A (en) * | 2012-10-08 | 2013-01-16 | 广西柳工机械股份有限公司 | Wheel-side oil seal temperature reducing device for loader driving axle |
| CN103557247A (en) * | 2013-11-13 | 2014-02-05 | 株洲市九洲传动机械设备有限公司 | Normally open type built-in brake structure of speed reducer |
| CN103883645B (en) * | 2014-04-13 | 2016-09-14 | 福建亚南电机有限公司 | A kind of two grades of change speed gear box cut spring antifriction system and devices of the through vehicle bridge of pure electric vehicle |
| CN103883645A (en) * | 2014-04-13 | 2014-06-25 | 福建亚南电机有限公司 | Disengaging spring friction reducing system device of full electric vehicle connection axle two-gear speed changing box |
| CN105313854B (en) * | 2014-08-01 | 2018-05-15 | 绩溪县徽洋车桥有限责任公司 | Bridge before a kind of fluid-link steering wet braking |
| CN105313854A (en) * | 2014-08-01 | 2016-02-10 | 绩溪县徽洋车桥有限责任公司 | Hydraulic steering wet brake front axle |
| CN105650147A (en) * | 2015-02-04 | 2016-06-08 | 湖北康晨安宝矿业设备有限责任公司 | Hydraulic brake device |
| CN107806482A (en) * | 2017-11-20 | 2018-03-16 | 清华大学苏州汽车研究院（相城） | A kind of drawing sheet brake system for eliminating mechanical hysteresis |
| CN107806482B (en) * | 2017-11-20 | 2024-04-02 | 清华大学苏州汽车研究院（相城） | Stretching type sheet brake system capable of eliminating mechanical hysteresis |
| CN108730375A (en) * | 2018-05-31 | 2018-11-02 | 盛瑞传动股份有限公司 | Brake and speed changer |
| CN113757273A (en) * | 2021-08-20 | 2021-12-07 | 北京工业大学 | Multi-piece friction-hydraulic composite brake support bridge |
| CN113757273B (en) * | 2021-08-20 | 2022-06-21 | 北京工业大学 | Multi-piece friction-hydraulic composite braking support bridge |
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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: 20080514 |