CN203847597U - Hydraulic wet normally-closed brake for drive axle - Google Patents
Hydraulic wet normally-closed brake for drive axle Download PDFInfo
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- CN203847597U CN203847597U CN201420264413.6U CN201420264413U CN203847597U CN 203847597 U CN203847597 U CN 203847597U CN 201420264413 U CN201420264413 U CN 201420264413U CN 203847597 U CN203847597 U CN 203847597U
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- 239000012530 fluid Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 66
- 239000010720 hydraulic oil Substances 0.000 description 12
- 210000000515 tooth Anatomy 0.000 description 8
- 239000000314 lubricant Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
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Abstract
The utility model discloses a hydraulic wet normally-closed brake for a drive axle, and relates to wet brakes with brake block combinations for vehicles. The hydraulic wet normally-closed brake is integrally circular and comprises a support frame, a wet brake block combination and a hydraulic cylinder. The support frame comprises a stop ring, an outer ring and an inner ring, and the hydraulic cylinder comprises a cylinder block, a cylinder cover and a piston; the stop ring, the outer ring, the cylinder cover and the cylinder block are sequentially fixedly integrally connected with one another from front to back; the piston is arranged in a space enclosed by the cylinder cover and the cylinder block, and a plurality of brake springs are arranged between the inner surface of the bottom of the cylinder block and the rear end surface of the piston; an annular piston rod at the front end of the piston extends out of the cylinder cover and is butted to the brake block combination, and an annular inner cavity of the hydraulic cylinder is formed among the inner surface of an upright wall of the cylinder block, the rear end surface of the cylinder cover, the outer peripheral surface of a middle section of the piston and the front surface of an outer flange of the piston in an enclosed and is communicated with a hydraulic mechanism via oil inlet holes in the upright wall of the cylinder block; the brake springs drive the piston to advance, so that the brake block combination can be in a locked state; high-pressure oil is delivered into the inner cavity by the hydraulic mechanism, so that the piston can overcome pressures of the brake springs, and the brake block combination can be in a released state.
Description
Technical field
The utility model relates to a kind of vehicle brake, particularly relates to a kind of vehicle brake that uses the combination of wet braking sheet.
Background technique
The vehicle hydraulic type wet drive axle of existing use wet braking sheet combination is all open in usual with break, wherein a kind of typical structure as shown in Figure 5 and Figure 6: its entirety becomes circular, comprise that the outer shroud 2 of baffle ring 1, ring of ring and bottom have the ring supporting frame that the interior ring 3 of the round broad-mouthed receptacle for holding liquid shape of center hole forms, the wet braking sheet combination 4 of ring, bottom has the cylinder body 5 ' of round broad-mouthed receptacle for holding liquid shape of center hole and the ring oil hydraulic cylinder of the piston 7 ' composition of ring.Wherein, the interior ring 3 of supporting frame is fixedly connected with the wheel hub of vehicle, and the cylinder body 5 ' of oil hydraulic cylinder is fixedly connected with the back axle of vehicle.
Baffle ring 1, the outer shroud 2 of supporting frame are identical with the cylinder body 5 ' external diameter of oil hydraulic cylinder.Baffle ring 1 is near the uniform multiple screws 105 that run through front and rear end of outer circumferential face, and multiple screw rods 11 are respectively through the upper corresponding via hole 507 ' of cylinder body 5 ' wall 501 ', and on outer shroud 2, the via hole 202 of correspondence, is locked in the corresponding screw 105 of baffle ring 1.The baffle ring of supporting frame 1 is fixedly connected sequentially into an entirety with outer shroud 2 from front to back with the cylinder body 5 ' of oil hydraulic cylinder.On the ear end face of baffle ring 1, have circular groove 103 one in each screw 105 inner sides, in this circular groove 103, be provided with the gap between seal ring sealing baffle ring 1 ear end face and outer shroud 2 front-end faces.Outer shroud 2 ear end faces have circular groove 203 one in each via hole 202 inner sides, are provided with the gap between seal ring sealing outer shroud 2 ear end faces and cylinder body 5 ' front-end face in this circular groove 203.
Uniform multiple spline tooths 201 parallel with outer shroud 2 axis on outer shroud 2 endoporus.Interior ring 3 front ends open wide, and its periphery is provided with multiple splines 304 parallel with its axis.Braking plate combination 4 is superimposed and is formed by the braking plate 41 of multi-disc ring and the friction plate 42 of multi-disc ring, between each braking plate 41 and adjacent friction plate 42, has lubricant oil.Wherein, the endoporus of braking plate 41 is greater than the external diameter of interior ring 3, and the external diameter of braking plate 41 is much larger than the external diameter of friction plate 42.The uniform multiple splines 411 of periphery of braking plate 41 engage respectively spline tooth 201 corresponding on outer shroud 2 endoporus.Spline 304 corresponding to ring 3 peripheries in the multiple spline tooths 421 of interior Zhou Junbu of friction plate 42 engage respectively.
The endoporus 101 of baffle ring 1 is three grades of pre-large post-small shoulder holes.The wheel hub that the front portion of this endoporus 101 and middle part are mounting vehicle provides steps down; The rear portion of this endoporus 101 can allow that interior ring 3 therefrom comes in and goes out.The inward flange 102 at baffle ring 1 endoporus 101 rear portions stops braking plate combination 4.In the time that braking plate combination 4 is subject to the compressing of axial force, each braking plate 41 produces friction with adjacent friction plate 42, hinders mutual rotation, even can embrace tightly together.In the time that braking plate combination 4 is not subject to axial force compressing, each braking plate 41 does not rub with adjacent friction plate 42, can freely relatively rotate.
In oil hydraulic cylinder, the opening of cylinder body 5 ', front, has together large annular groove 506 ' on the front-end face of cylinder body 5 ' wall 501 '; On the diapire of large annular groove 506 ', have multiple oil inlet holes 508 ' that extend through cylinder body 5 ' ear end face.Piston 7 is arranged in the large annular groove 506 ' of cylinder body 5 ', and the piston rod 702 ' of piston 7 ' front end annular stretches out and withstands braking plate and combine 4 rear sides from large annular groove 506 '.The outer circumference face of piston 7 ' outer circumferential face and cylinder body 5 ' large annular groove 506 ' matches, large annular groove 506 ' the inside circumference face of the inner peripheral surface of piston 7 ' and cylinder body 5 ' matches, between the large annular groove 506 ' bottom surface of cylinder body 5 ' and the rear surface of piston 7 ', cross an annular oil hydraulic cylinder inner chamber 9 ', this oil hydraulic cylinder inner chamber 9 ' each oil inlet hole 508 ' on the large annular groove 506 ' diapire of cylinder body 5 ' is communicated with outside hydraulic mechanism.
When outside hydraulic mechanism is failure to actuate, while not sending into the hydraulic oil of high pressure by oil inlet hole to oil hydraulic cylinder inner chamber 9 ', the volume of oil hydraulic cylinder inner chamber 9 ' is very little, the annular piston bar 702 ' of piston 7 ' can not combine braking plate 4 inward flanges 102 that press to supporting frame baffle ring 1, lubricant oil between all friction plates 42 and adjacent braking plate 41 works, all friction plates 42 do not work to adjacent braking plate 41, braking plate combination 4 is in releasing state, and interior ring 3 can freely rotate relative to baffle ring 1 and outer shroud 2.
When outside hydraulic mechanism action, while sending into the hydraulic oil of high pressure by oil inlet hole to oil hydraulic cylinder inner chamber 9 ', piston 7 ' is to moving away from the direction of cylinder body 5 ' bottom 502 ', and the volume of oil hydraulic cylinder inner chamber 9 ' increases.The annular piston bar 702 ' of piston 7 ' front end presses to braking plate combination 4 inward flange 102 of supporting frame baffle ring 1, all friction plates 42 are tightly clamped by adjacent braking plate 41 respectively, braking plate combination 4 is in locking state, and interior ring 3 cannot rotate relative to baffle ring 1 and outer shroud 2.Otherwise when outside hydraulic mechanism stops to the hydraulic oil of oil hydraulic cylinder inner chamber 9 ' conveying high-pressure, braking plate combination 4 enters releasing state again.
But the vehicle hydraulic type wet drive axle break open in usual of this use wet braking sheet combination, have following shortcoming: 1, storing cycle is on the slope time, outside hydraulic mechanism stops to the hydraulic oil of oil hydraulic cylinder inner chamber 9 ' conveying high-pressure, braking plate combination 4 is in releasing state, this vehicle brake is inoperative, and other braking mechanism need to be set in addition.2, once outside hydraulic mechanism break down, can not be to the hydraulic oil of oil hydraulic cylinder inner chamber 9 ' conveying high-pressure, braking plate combination 4 enters releasing state, this vehicle brake is inoperative, vehicle lose safety guarantee.In various complex-terrains, move the harsh requirement to Security so use the vehicle hydraulic type wet drive axle open in usual break of wet braking sheet combination to be not suitable with the heavy engineering vehicles such as large-scale folder wood car, large-tonnage forklift truck.
Model utility content
The utility model aims to provide and a kind ofly meets heavy engineering vehicle and in various complex-terrains, move the fluid power type wet drive axle normally closed brake that the harshness of Security is required.
The technical solution of the utility model is: fluid power type wet drive axle normally closed brake, its entirety becomes circular, comprise that the outer shroud of baffle ring, ring of ring and bottom have the ring supporting frame that the interior ring of the round broad-mouthed receptacle for holding liquid shape of center hole forms, the combination of wet braking sheet and the ring oil hydraulic cylinder of ring; Braking plate combination is arranged between the outer shroud and interior ring of supporting frame, in braking plate combination, the endoporus of ownership moving plate periphery and outer shroud forms spline joint in axial sliding, and braking plate combines the endoporus of all friction plates and the periphery of interior ring forms spline joint in axial sliding; Baffle ring is in the past in the face of braking plate combination is done spacing; It is characterized in that: this oil hydraulic cylinder has bottom to have the cylinder body of the round broad-mouthed receptacle for holding liquid shape of center hole, the cylinder cap of ring, piston and multiple brake spring of ring; The baffle ring of supporting frame is from front to back fixedly connected sequentially into an entirety with the cylinder cap of oil hydraulic cylinder with cylinder body with outer shroud; Piston is arranged in the space that cylinder cap and cylinder body surround, and between the internal surface of cylinder base and the ear end face of piston, each brake spring is set; The piston rod of piston nose annular stretches out and withstands braking plate and combine rear side from the endoporus of cylinder cap, piston middle part matches with the endoporus of cylinder cap, the rear flange of piston rear end evagination and the wall internal surface of cylinder body match, between wall internal surface, cylinder cap ear end face, the stage casing outer circumferential face of piston and the front surface of piston outward flange of cylinder body, cross an annular oil hydraulic cylinder inner chamber, the oil inlet hole of this inner chamber on cylinder body wall is communicated with outside hydraulic mechanism.
This fluid power type wet drive axle is with in normally closed brake, and the interior ring of supporting frame is fixedly connected with the wheel hub of vehicle, and the cylinder body of oil hydraulic cylinder is fixedly connected with the back axle of vehicle.In the inner chamber of this normally closed brake by annular in the cylinder body of oil hydraulic cylinder, multiple brake springs and the oil inlet hole on cylinder body wall are set, this inner chamber is communicated with outside hydraulic mechanism; Make piston forward that braking plate is combined to top with each brake spring and in normally closed locking state, guarantee that the wheel hub of vehicle can not rotate relative to back axle to baffle ring; While only having external hydraulic mechanism to send into high pressure oil to oil hydraulic cylinder inner chamber, piston overcomes backward the pressure of brake spring and braking plate is combined in releasing state, and the wheel hub of vehicle can freely rotate relative to back axle.Solved storing cycle on the slope time, hydraulic mechanism stops to the hydraulic oil of oil hydraulic cylinder inner chamber conveying high-pressure, and braking plate combines the problem inoperative, other braking mechanism need to be set in addition.Once outside hydraulic mechanism breaks down, can not be to the hydraulic oil of oil hydraulic cylinder inner chamber conveying high-pressure, braking plate combination enters locking state automatically, and this vehicle brake works, and vehicle stop travels, and traffic safety obtains practical guarantee.
Implement in structure preferred: the ear end face of described cylinder cap encircles platform after extending back one; Described cylinder body front end opens wide, and the wall of cylinder body is enclosed within the rear ring platform periphery of cylinder cap, and withstands on the ear end face of cylinder cap; The internal surface of cylinder body wall becomes cooperation with the periphery of encircling platform after cylinder cap; Piston is arranged in the space that cylinder cap and cylinder base surround; The annular piston bar that piston nose portion extends forward inner side stretches out forward from the endoporus of cylinder cap, and pushes up on the ear end face of braking plate combination in interior ring outside; The periphery in piston stage casing becomes cooperation with inner hole of cylinder cover; The outward flange that piston rear end portion extends outward, the outer circumferential face of this outward flange becomes cooperation with the wall internal surface of cylinder body; After on the wall internal surface of cylinder body, cylinder cap, between ring platform ear end face, the stage casing outer circumferential face of piston and the front surface of piston outward flange, cross an annular oil hydraulic cylinder inner chamber; Inside the ear end face of described piston, uniform multiple darker blind holes, install the brake spring described in each blind hole, the internal surface of cylinder base described in the brake spring contact described in each.
Adopt above-mentioned structural type to form oil hydraulic cylinder inner chamber, can make the inner side of piston have the uniform multiple darker blind holes in larger space, longer brake spring is installed, thereby can be used the brake spring that elastic force is stronger, increase the coupling mechanism force of the locking state of braking plate combination.
And then: the outer circumferential face in described piston stage casing has the first annular groove and lay the first seal ring in this first annular groove; The outer circumferential face of described piston outward flange has the second annular groove and lay the second seal ring in this second annular groove; On the outer circumferential face of the rear ring platform of described cylinder cap, have together rear annular groove and in this rear annular groove, lay the 3rd seal ring; Between the stage casing periphery of described piston and the endoporus of described cylinder cap, sealed by the first seal ring; Between the wall internal surface of the outward flange of described piston and described cylinder body, sealed by the second seal ring; The outer circumferential face of the rear ring platform of described cylinder cap and described cylinder body wall internal surface are sealed by the 3rd seal ring.
Form arranges three seal rings according to this configuration, is guaranteeing under the prerequisite of oil hydraulic cylinder bore seal, can simplify the processing of seal ring mounting groove and the assembling of oil hydraulic cylinder, reduces production costs.
Particularly: the ear end face of described cylinder body has a blind hole that stretches into its wall, on the internal surface of cylinder body wall, have one radially via hole be communicated with the front end of this blind hole, the oil inlet hole that this via hole and blind hole composition are described.
The structure of this oil inlet hole can connect outside hydraulic mechanism from the ear end face of cylinder body, avoids linkage structure to be exposed in the poor and Vehicle Driving Cycle of compactedness that cylinder body periphery brings and is subject to the danger that foreign matter destroys.
The utility model fluid power type wet drive axle is used in 48.5 tons of unloaded deadweights with normally closed brake according to the mode shown in Fig. 4, in the large-tonnage forklift truck of fully loaded useful load 40 tons (88.5 tons of gross weights), its parking brake system, actual measurement parking on ramp braking ability is as following table:
From above testing result, its parking on ramp braking ability is far above the requirement in NBS defined 20% ramp.
The break open in usual of existing use wet braking sheet combination is used in 48.5 tons of unloaded deadweights according to the mode shown in Fig. 4, in the large-tonnage forklift truck of fully loaded useful load 40 tons (88.5 tons of gross weights), its parking brake system, actual measurement parking on ramp braking ability is as following table:
| Sequence number | Test item | The ramp gradient | Testing result |
| 1 | Unloaded | 20％ | There is landslide phenomenon |
| 2 | Fully loaded | 20％ | There is landslide phenomenon |
Visible, to compare with break open in usual with the fluid power type wet drive axle of existing use wet braking sheet combination, the utility model fluid power type wet drive axle can be realized larger braking moment with normally closed brake, has higher Security.When the utility model fluid power type wet drive axle has solved large-tonnage forklift truck stopping brake with normally closed brake, brake hypodynamic problem; While better having solved driving, the problem of emergency braking.The utility model fluid power type wet drive axle is placed in and can adapts to the heavy engineering vehicles such as large-scale folder wood car, large-tonnage forklift truck completely after wheel reductor and move the harsh requirement to Security at various complex-terrains with normally closed brake.
Brief description of the drawings
Fig. 1 is an embodiment's of the utility model fluid power type wet drive axle normally closed brake cross-sectional view.
Fig. 2 is the partial enlarged drawing of A portion in Fig. 1.
Fig. 3 is the partial enlarged drawing of B portion in Fig. 1.
Fig. 4 is Fig. 1 embodiment's application structure schematic diagram.
Fig. 5 is the cross-sectional view of the fluid power type wet drive axle break open in usual of existing use wet braking sheet combination.
Fig. 6 is the partial enlarged drawing of A ' portion in Fig. 5.
Embodiment
An embodiment's of normally closed brake cross-section structure for the utility model fluid power type wet drive axle, as shown in Figure 1, its entirety becomes circular, it comprises that the outer shroud 2 of baffle ring 1, ring of ring and bottom have the ring supporting frame that the interior ring 3 of the round broad-mouthed receptacle for holding liquid shape of center hole forms, the wet braking sheet combination 4 of ring, bottom has the cylinder body 5 of the round broad-mouthed receptacle for holding liquid shape of center hole, the cylinder cap 6 of ring, the piston 7 of ring and the ring oil hydraulic cylinder that multiple brake spring 8 forms.
The baffle ring 1 of supporting frame is from front to back fixedly connected sequentially into an entirety with the cylinder cap 6 of oil hydraulic cylinder with cylinder body 5 with outer shroud 2.Braking plate combination 4 is arranged between the outer shroud 2 and interior ring 3 of supporting frame, in braking plate combination 4, the endoporus of ownership moving plate 41 peripheries and outer shroud 2 forms spline joint in axial sliding, and braking plate combines the endoporus of 4 all friction plates 42 and the periphery of interior ring 3 forms spline joint in axial sliding.Baffle ring 1 is in the past in the face of braking plate combination 4 is done spacing.
In oil hydraulic cylinder, piston 7 is arranged in the space that cylinder cap 6 and cylinder body 5 surround, the piston rod 702 of piston 7 front end annulars stretches out and withstands braking plate and combine 4 rear sides from the endoporus of cylinder cap 6, the endoporus of piston 7 middle parts and cylinder cap 6 matches, the rear flange 705 of piston 7 rear end evaginations matches with wall 501 internal surfaces of cylinder body 5, at wall 501 internal surfaces of cylinder body 5, cylinder cap 6 ear end faces, between the front surface of the stage casing outer circumferential face of piston 7 and piston 7 outward flanges 705, cross an annular oil hydraulic cylinder inner chamber 9, the oil inlet hole of this oil hydraulic cylinder inner chamber 9 on cylinder body 5 walls 501 is communicated with outside hydraulic mechanism.
Referring to Fig. 1 and Fig. 2: baffle ring 1, the outer shroud 2 of supporting frame are identical with cylinder body 5, cylinder cap 6 external diameters of oil hydraulic cylinder.The baffle ring 1 of supporting frame is near the uniform multiple screws 105 that run through front and rear end of outer circumferential face, and corresponding these screws 105 of outer shroud 2 are respectively equipped with corresponding via hole 202, and corresponding these screws 105 of cylinder cap 6 are respectively equipped with corresponding via hole 603.On the wall 501 of cylinder body 5, each screw 105 of corresponding baffle ring 1 is respectively equipped with the via hole 506 running through accordingly.The screw rod 11 of multiple annular distribution passes respectively corresponding via hole 506 on cylinder body 5 walls 501, the via hole 603 of correspondence on cylinder cap 6, and on outer shroud 2, the via hole 202 of correspondence, is locked in the corresponding screw 105 of baffle ring 1.The baffle ring of supporting frame 1 is from front to back fixedly connected sequentially into an entirety with the cylinder cap 6 of oil hydraulic cylinder with cylinder body 5 with outer shroud 2.On the ear end face of baffle ring 1, have circular groove 103 one in each screw 105 inner sides, in this circular groove 103, be provided with the gap between seal ring sealing baffle ring 1 ear end face and outer shroud 2 front-end faces.Outer shroud 2 ear end faces have circular groove 203 one in each via hole 202 inner sides, are provided with the gap between seal ring sealing outer shroud 2 ear end faces and cylinder cap 6 front-end faces in this circular groove 203.
Uniform multiple spline tooths 201 parallel with outer shroud 2 axis on outer shroud 2 endoporus.The thickness of outer shroud 2 is slightly larger than the thickness of braking plate combination 4.Interior ring 3 front ends open wide, and its thickness is slightly larger than the thickness of outer shroud 2, and its periphery is provided with multiple splines 304 parallel with its axis.Braking plate combination 4 is superimposed and is formed by the braking plate 41 of multi-disc ring and the friction plate 42 of multi-disc ring, between each braking plate 41 and adjacent friction plate 42, has lubricant oil.Wherein, the endoporus of braking plate 41 is greater than the external diameter of interior ring 3, and the external diameter of braking plate 41 is much larger than the external diameter of friction plate 42.The uniform multiple splines 411 of periphery of braking plate 41 engage respectively spline tooth 201 corresponding on outer shroud 2 endoporus.Spline 304 corresponding to ring 3 peripheries in the multiple spline tooths 421 of interior Zhou Junbu of friction plate 42 engage respectively.
The endoporus 101 of the baffle ring 1 of supporting frame front side is three grades of pre-large post-small shoulder holes.The wheel hub that the front portion of this endoporus 101 and middle part are mounting vehicle provides steps down; The rear portion of this endoporus 101 can allow that interior ring 3 therefrom comes in and goes out.The inward flange 102 at baffle ring 1 endoporus 101 rear portions stops braking plate combination 4.In the time that braking plate combination 4 is subject to the compressing of axial force, each braking plate 41 produces friction with adjacent friction plate 42, hinders mutual rotation, even can embrace tightly together.In the time that braking plate combination 4 is not subject to axial force compressing, each braking plate 41 does not rub with adjacent friction plate 42, can freely relatively rotate.
The structure of oil hydraulic cylinder, refers to Fig. 1 and Fig. 3: the ear end face of cylinder cap 6 encircles platform 601 after the inner side of each via hole 603 extends back one.On the outer circumferential face of this rear ring platform 601, have together rear annular groove 602 and lay a seal ring 609 in this rear annular groove 602.Cylinder body 5 front ends open wide, and the wall 501 of cylinder body 5 is enclosed within rear ring platform 601 peripheries of cylinder cap 6, and withstands on the ear end face of cylinder cap 6.The internal surface of cylinder body 5 walls 501 becomes cooperation with the periphery of the rear ring platform 601 of cylinder cap 6.Piston 7 is arranged in the space 503 that cylinder cap 6 and cylinder body 5 bottoms 502 surround, and the endoporus 701 of piston 7 is straight hole; The annular piston bar 702 that extend forward piston 7 front end inner sides stretches out forward from the endoporus 603 of cylinder cap 6, and pushes up in interior ring 3 outsides on the ear end face of braking plate combination 4.
603 one-tenth moving cooperations of the periphery in piston 7 stage casings and cylinder cap 6 endoporus.The outer circumferential face in piston 7 stage casings has the first annular groove 704 and in this first annular groove 704, lays the first seal ring 708.The outward flange 705 that piston 7 rearward end extend outward, the outer circumferential face of outward flange 705 becomes cooperation with wall 501 internal surfaces of cylinder body 5.The outer circumferential face of piston 7 outward flanges 705 has the second annular groove 706 and in this second annular groove 706, lays the second seal ring 709.Between the stage casing periphery of piston 7 and the endoporus 603 of cylinder cap 6, sealed by the first seal ring 708.Between wall 501 internal surfaces of the outward flange 705 of piston 7 and cylinder body 5, sealed by the second seal ring 709; The outer circumferential face of the rear ring platform 601 of cylinder cap 6 and the sealed circle 609 of cylinder body 5 wall 501 internal surface seal.Thereby between ring platform 601 ear end faces, the stage casing outer circumferential face of piston 7 and the front surface of piston 7 outward flanges 705, cross an annular oil hydraulic cylinder inner chamber 9 after on wall 501 internal surfaces of cylinder body 5, cylinder cap 6.
The ear end face of cylinder body 5 has at least one blind hole 508 that stretches into its wall 501, and internal thread is established at each blind hole 508 rear portions, to connect the corresponding high-pressure oil pipe of external hydraulic mechanism.On the internal surface of cylinder body 5 walls 501, corresponding each blind hole 508 has a radially via hole 509, and this via hole 509 is communicated with the front end of this blind hole 508.These a few via holes 509 form oil inlet hole with blind hole 508; The oil inlet hole of oil hydraulic cylinder inner chamber 9 on cylinder body 5 walls 501 is communicated with outside hydraulic mechanism.
The internal surface of cylinder body 5 bottoms 502 is near uniform six the shallow nests 507 of wall 501 place's annular.Upper corresponding these six the shallow nests 507 in ear end face inner side of piston 7, correspondingly uniform six darker blind holes 707, install a brake spring 8 in each blind hole 707.Six shallow nests 507 of cylinder body 5 bottoms 502 withstand respectively brake spring 8 corresponding on piston 7.
When outside hydraulic mechanism is failure to actuate, while not sending into the hydraulic oil of high pressure by oil inlet hole to oil hydraulic cylinder inner chamber 9, each brake spring 8 pushes away piston 7 forward, the volume of oil hydraulic cylinder inner chamber 9 is very little, the annular piston bar 702 of piston 7 presses to braking plate combination 4 inward flange 102 of supporting frame baffle ring 1, all friction plates 42 are tightly clamped by adjacent braking plate 41 respectively, and braking plate combination 4 is in locking state, and interior ring 3 can not rotate relative to baffle ring 1 and outer shroud 2.
When outside hydraulic mechanism action, while sending into the hydraulic oil of high pressure by oil inlet hole to oil hydraulic cylinder inner chamber 9, piston 7 moves to the bottom 502 of cylinder body 5, and the volume of oil hydraulic cylinder inner chamber 9 increases.Each brake spring 8 is compressed; The annular piston bar 702 releasing brake sheets combinations 4 of piston 7 front ends, all friction plates 42 work with the lubricant oil between adjacent braking plate 41, braking plate combination 4 disengaging locking states, interior ring 3 can freely rotate relative to baffle ring 1 and outer shroud 2.Otherwise when outside hydraulic mechanism stops to the hydraulic oil of oil hydraulic cylinder inner chamber 9 conveying high-pressures, each brake spring 6 pushes away piston 7 forward again, braking plate combination 4 enters locking state again.
The one application of the present embodiment on vehicle hydraulic type wet drive axle, as shown in Figure 4: axle housing 10 is fixed on vehicle, the axle sleeve 1001 on axle housing 10 right sides is fixedly connected with axle housing 10.Under the driving of main driving assembly that semiaxis 1002 in axle sleeve 1001 can be on vehicle drive axle, rotate.Axle sleeve 1001 passes from the axle sleeve hole 504 of normally closed brake 30 (the present embodiment) cylinder body 5 bottom 502 central authorities, multiple bolts 1003 through the corresponding mounting hole 505 of cylinder body 5 bottom 502 this axle sleeve hole 504 periphery, are fixedly connected with cylinder body 5 respectively with the outward flange dish of axle sleeve 1001.The rear side end axle sleeve 1001 of axle sleeve 1001 is connected by spline with the joint 90071 of ring gear 9007 rear sides of wheel reductor 90 through the endoporus 701 of piston 7, axle sleeve via hole 305, the endoporus 101 of baffle ring 1 and the endoporus of wheel hub 20 of interior ring 3 bottom 302 central authorities.Wheel hub 20 is installed in rotation on axle sleeve 1001 by the cone bearing 2001 of rear side (right side in Fig. 4) and the cone bearing 2005 in front side (left side in Fig. 4).The mounting ring platform of wheel hub 20 rear sides is inserted in the interior concave space 301 of interior ring 3, and several screws 2002, through interior ring 3 bottom 302 axle sleeve via hole 305 periphery the corresponding mounting hole 303, are fixedly connected with interior ring 3 with the mounting ring platform of wheel hub 20.
The front end of semiaxis 1002 stretches out from the front end of axle sleeve 1001, and the sun gear 9006 of mounting wheel side reducer 90.In wheel reductor 90, the flange plate of planetary wheel carrier 9001 rear sides docks with the flange plate of wheel hub 20 leading portions, and is fixedly connected with by multiple rim bolts 2004.In wheel reductor 90, the front fixed tray of flower basket rack 9002 is fixed on planetary wheel carrier 9001 front ends, and the rear fixed tray 90021 of flower basket rack 9002 stretches in the inner space of ring gear 9007.Multiple planet wheel shafts 9004 are installed between the front fixed tray of flower basket rack 9002 and rear fixed tray 90021, on each planet wheel shaft 9004, be rotatably mounted a planet wheel 9006, when this planet wheel 9006 engages with sun gear 9005, be meshed in the internal tooth of ring gear 9007.
At ordinary times, vehicle is in vehicle stop state, and the semiaxis 1002 on axle housing 10 right sides is motionless, and wheel reductor 90 and wheel hub 20 are in static.The hydraulic mechanism of vehicle is failure to actuate, and in normally closed brake 30, each brake spring 8 pushes away piston 7 forward, braking plate combination 4 is pressed to the baffle ring 1 of supporting frame, makes braking plate combination 4 in locking state, and interior ring 3 can not rotate relative to baffle ring 1 and outer shroud 2.Normally closed brake 30 does not allow wheel hub 20 to rotate relative to axle sleeve 1001.
When vehicle launch, the hydraulic mechanism of vehicle moves, and sends into the hydraulic oil of high pressure by the oil inlet hole of normally closed brake 30 to oil hydraulic cylinder inner chamber 9, and piston 7 moves to the bottom 502 of cylinder body 5, and the volume of oil hydraulic cylinder inner chamber 9 increases.Each brake spring 8 is compressed; The annular piston bar 702 releasing brake sheets combinations 4 of piston 7 front ends, all friction plates 42 work with the lubricant oil between adjacent braking plate 41, braking plate combination 4 disengaging locking states, interior ring 3 can freely rotate relative to baffle ring 1 and outer shroud 2.Normally closed brake 30 allows wheel hub 20 to rotate relative to axle sleeve 1001.
In the time that vehicle main driving assembly drives the semiaxis 1002 on axle housing 10 right sides to rotate, the sun gear 9005 of semiaxis 1002 front ends makes each planet wheel 9006 planet wheel shaft 9004 rotations of self relatively thereupon on flower basket rack 9002.When each planet wheel 9006 rotation, owing to engaging with the internal tooth of fixed ring gear 9007, will promote the relative sun gear 9005 of flower basket rack 9002 and make the revolution motion slowing down, flower basket rack 9002 promotes planetary wheel carrier 9001 and rotates relative to axle sleeve 1001 with wheel hub 20.Vehicle enters travelling state.
When vehicle brake, the hydraulic mechanism of vehicle stops to the hydraulic oil of oil hydraulic cylinder inner chamber 9 conveying high-pressures of normally closed brake 30, and each brake spring 6 pushes away piston 7 forward, and braking plate combination 4 enters locking state, stop wheel hub 20 to rotate relative to axle sleeve 1001, vehicle is forced to slow down and even stops travelling.
Due in vehicle drive system, after normally closed brake 30 is placed in wheel reductor 90, can realize larger braking moment, the rotation of wheel hub 20 is had to larger braking effect.
The above, be only the utility model preferred embodiment, do not limit with this scope that the utility model is implemented, and the equivalence of doing according to the technical solution of the utility model and description changes and modifies, and all should belong to the scope that the utility model is contained.
Claims (4)
1. fluid power type wet drive axle normally closed brake, its entirety becomes circular, comprise that the outer shroud of baffle ring, ring of ring and bottom have the ring supporting frame that the interior ring of the round broad-mouthed receptacle for holding liquid shape of center hole forms, the combination of wet braking sheet and the ring oil hydraulic cylinder of ring; Braking plate combination is arranged between the outer shroud and interior ring of supporting frame, in braking plate combination, the endoporus of ownership moving plate periphery and outer shroud forms spline joint in axial sliding, and braking plate combines the endoporus of all friction plates and the periphery of interior ring forms spline joint in axial sliding; Baffle ring is in the past in the face of braking plate combination is done spacing; It is characterized in that: this oil hydraulic cylinder has bottom to have the cylinder body of the round broad-mouthed receptacle for holding liquid shape of center hole, the cylinder cap of ring, piston and multiple brake spring of ring; The baffle ring of supporting frame is from front to back fixedly connected sequentially into an entirety with the cylinder cap of oil hydraulic cylinder with cylinder body with outer shroud; Piston is arranged in the space that cylinder cap and cylinder body surround, and between the internal surface of cylinder base and the ear end face of piston, each brake spring is set; The piston rod of piston nose annular stretches out and withstands braking plate and combine rear side from the endoporus of cylinder cap, piston middle part matches with the endoporus of cylinder cap, the rear flange of piston rear end evagination and the wall internal surface of cylinder body match, between wall internal surface, cylinder cap ear end face, the stage casing outer circumferential face of piston and the front surface of piston outward flange of cylinder body, cross an annular oil hydraulic cylinder inner chamber, the oil inlet hole of this inner chamber on cylinder body wall is communicated with outside hydraulic mechanism.
2. fluid power type wet drive axle normally closed brake according to claim 1, is characterized in that: the ear end face of described cylinder cap encircles platform after extending back one; Described cylinder body front end opens wide, and the wall of cylinder body is enclosed within the rear ring platform periphery of cylinder cap, and withstands on the ear end face of cylinder cap; The internal surface of cylinder body wall becomes cooperation with the periphery of encircling platform after cylinder cap; Piston is arranged in the space that cylinder cap and cylinder base surround; The annular piston bar that piston nose portion extends forward inner side stretches out forward from the endoporus of cylinder cap, and pushes up on the ear end face of braking plate combination in interior ring outside; The periphery in piston stage casing becomes cooperation with inner hole of cylinder cover; The outward flange that piston rear end portion extends outward, the outer circumferential face of this outward flange becomes cooperation with the wall internal surface of cylinder body; After on the wall internal surface of cylinder body, cylinder cap, between ring platform ear end face, the stage casing outer circumferential face of piston and the front surface of piston outward flange, cross an annular oil hydraulic cylinder inner chamber; Inside the ear end face of described piston, uniform multiple darker blind holes, install the brake spring described in each blind hole, the internal surface of cylinder base described in the brake spring contact described in each.
3. fluid power type wet drive axle normally closed brake according to claim 2, is characterized in that: the outer circumferential face in described piston stage casing has the first annular groove and lay the first seal ring in this first annular groove; The outer circumferential face of described piston outward flange has the second annular groove and lay the second seal ring in this second annular groove; On the outer circumferential face of the rear ring platform of described cylinder cap, have together rear annular groove and in this rear annular groove, lay the 3rd seal ring; Between the stage casing periphery of described piston and the endoporus of described cylinder cap, sealed by the first seal ring; Between the wall internal surface of the outward flange of described piston and described cylinder body, sealed by the second seal ring; The outer circumferential face of the rear ring platform of described cylinder cap and described cylinder body wall internal surface are sealed by the 3rd seal ring.
4. according to the fluid power type wet drive axle normally closed brake described in claim 1 or 2 or 3, it is characterized in that: the ear end face of described cylinder body has a blind hole that stretches into its wall, on the internal surface of cylinder body wall, have one radially via hole be communicated with the front end of this blind hole, the oil inlet hole that this via hole and blind hole composition are described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420264413.6U CN203847597U (en) | 2014-05-22 | 2014-05-22 | Hydraulic wet normally-closed brake for drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420264413.6U CN203847597U (en) | 2014-05-22 | 2014-05-22 | Hydraulic wet normally-closed brake for drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847597U true CN203847597U (en) | 2014-09-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420264413.6U Expired - Fee Related CN203847597U (en) | 2014-05-22 | 2014-05-22 | Hydraulic wet normally-closed brake for drive axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847597U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728313A (en) * | 2015-03-31 | 2015-06-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Braking device for vehicle |
| CN105299108A (en) * | 2015-11-27 | 2016-02-03 | 重庆清平机械有限责任公司 | Wet normally-closed brake of speed reducer |
| CN110594320B (en) * | 2019-08-15 | 2021-05-11 | 襄阳彼勒液压机械有限公司 | Wet brake with parking brake |
-
2014
- 2014-05-22 CN CN201420264413.6U patent/CN203847597U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728313A (en) * | 2015-03-31 | 2015-06-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Braking device for vehicle |
| CN104728313B (en) * | 2015-03-31 | 2017-04-05 | 南车戚墅堰机车车辆工艺研究所有限公司 | A kind of automobile-used brake unit |
| CN105299108A (en) * | 2015-11-27 | 2016-02-03 | 重庆清平机械有限责任公司 | Wet normally-closed brake of speed reducer |
| CN105299108B (en) * | 2015-11-27 | 2017-09-12 | 重庆清平机械有限责任公司 | A kind of decelerator wet type normally engaged brake |
| CN110594320B (en) * | 2019-08-15 | 2021-05-11 | 襄阳彼勒液压机械有限公司 | Wet brake with parking brake |
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