CN209370332U - Front axle assembly equipped with normally closed type wet brake - Google Patents

Abstract

The utility model discloses a kind of front axle assemblies equipped with normally closed type wet brake, including front axle, two are rotatably arranged on the knuckle at front axle both ends, for installing the wheel hub of front-wheel, the normally closed type wet brake being mounted on knuckle, two track rod levers being separately positioned on two knuckles, it connects the track rod assembly of two track rod levers and is disposed therein the drag link arm on a knuckle for connecting with diverter, wheel hub is provided with external splines close to one end of front axle, wheel hub is rotatably arranged on knuckle by inner bearing and outer bearing, the beneficial effects of the utility model are: the utility model passes through the improvement of the shape to sealing ring in the prior art and corresponding baffle is arranged, solve in the prior art wet brake since sealing ring twists, rolling, the problems such as inordinate wear, makes At permeability, oil leak technological deficiency, the service life of the utility model had both been improved, caused by turn avoiding due to permeability, oil leak the problems such as environmental pollution.

Description

Front axle assembly equipped with normally closed type wet brake

Technical field

The utility model relates to a kind of front axle assemblies equipped with normally closed type wet brake.

Background technique

Requirement of the country to the safety and reliability of Mine haul vehicle and off-highway engineering machinery is higher and higher, related Laws and regulations also gradually perfect, and require also increasingly to improve to the safety and reliability of complete machine braking system, traditional disc type system Dynamic device or drum brake have not been suitable for Mine haul vehicle and the requirement of part engineering machinery, because depositing under mine environment In dust, haulage vehicle will lead to safety accident if generating spark at work；Wet brake system is an envelope in work The system closed will not generate spark, and the braking braking system of the front axle assy of Mine haul vehicle is all made of wet type so far Brake；But existing wet brake system is largely staying with explosion-proof performance open in usual, that complete machine needs increase additional Vehicle brake；It is equivalent to additional increase manufacturing cost.Normally closed type wet brake also has small part application, existing wet braking The sealing of device is sealed using O-ring seals, is reversed, is rolled or the problems such as inordinate wear frequent occurrence when moving under high pressure, Therefore there are the failures that the bad permeability frequent occurrence of sealing performance, oil leak etc. influence vehicle normal use.

Summary of the invention

The purpose of the utility model is to provide a kind of front axle assemblies equipped with normally closed type wet brake, solve the prior art Middle automobile front axle as the problems such as brake sealing ring twists, roll, inordinate wear caused by permeability, oil leak technology lack It falls into.

To solve the above problems, technical solution adopted in the utility model is: one kind being equipped with normally closed type wet brake Front axle assembly, including front axle, two be rotatably arranged on respectively the knuckle at front axle both ends, the wheel hub for installing front-wheel, peace Normally closed type wet brake on knuckle, two be separately positioned on two knuckles track rod levers, connection The track rod assembly of two track rod levers and it is disposed therein turn on a knuckle for connect with diverter To vertical pulling lever arm, the wheel hub is provided with external splines close to one end of front axle, and the wheel hub passes through inner bearing and outer bearing It is rotatably arranged on knuckle, the normally closed type wet brake includes brake inner end cap, brake casing, outside brake End cap, brake plunger, more springs, friction plate and brake(-holder) block, the brake inner end cap and brake outer end cap difference Be detachably arranged in the both ends of brake casing, the quantity of the brake(-holder) block than friction plate quantity more than one, and institute The brake(-holder) block stated is arranged alternately with friction plate, the outer round surface of the brake(-holder) block be provided with for in arrester shell body in The external tooth that spline matches, the bore area of the friction plate are provided with the internal tooth for matching with the spline on wheel hub, The brake plunger is arranged in one end of close brake inner end cap in arrester shell body and can be in arrester shell body Move along the axial direction of brake casing for squeezing brake(-holder) block, the both ends point of the spring be against brake inner end cap and On brake plunger, the spring is in compressive state and brake flexible with the movement of brake plunger, described The direction of the outer round surface of piston towards brake casing extends to form first annular protrusion, the interior table of the brake casing The direction for facing toward brake plunger extends to form the second annular protrusion, the first annular protrusion, the second annular protrusion, system Toroidal cavity is formed between actuator piston and brake casing, be provided on the brake casing communicated with toroidal cavity into Oilhole, brake fluid pressure oil from fuel feed hole enter toroidal cavity to push brake plunger to move in arrester shell body, described First annular protrusion is provided with first annular slot, setting in the first annular slot on the face for fitting with brake casing Having section is the first sealing ring of T shape, and first sealing ring includes the first sealing unit that section is rectangle and section is An annular first flap is respectively arranged in the two sides of second sealing unit in second sealing unit of arc, described It is provided with the second annular groove on the surface that second annular protrusion is used to fit with brake plunger, is set in second annular groove It is equipped with the second sealing ring that section is T shape, second sealing ring includes the third sealing unit and section that section is rectangle Two sides for the 4th sealing unit of arc, the 4th sealing unit are each provided with an annular second flap.This reality With in novel the first sealing ring and the second sealing ring be T shape, there are oil resistant, baffle resistant to high temperature in two sides, in hydraulic oil Pressure effect, since baffle side is planar structure, it is ensured that uniform force in a circumferential direction；Then because of baffle uniform force Sealing ring stress in two baffles is also uniformly, then to deform small, sealing structure when sealing ring is mobile and consolidate, and because be Plane stress, the O-ring seals used than the prior art can bear bigger pressure, avoid O-ring seals under high pressure When mobile the problems such as recurrent torsion, rolling, inordinate wear caused by permeability, oil leak and other issues, both improved this The service life of utility model, caused by turn avoiding due to permeability, oil leak the problems such as environmental pollution.

Upper master is provided with for the side with preceding axis connection on the knuckle as a further improvement of the utility model, Mounting hole and lower stub mounting hole are sold, the both ends of the front axle are respectively provided with a stub connecting hole, the upper stub installation Hole and lower stub mounting hole coaxial line, the interior setting of the upper stub mounting hole, stub connecting hole and lower stub mounting hole are useful It being connected in connection front axle with the stub of knuckle, one end of the drag link arm is fixedly connected with the top of knuckle, One end of track rod lever is fixedly connected with the lower part of knuckle, and the other end and track rod assembly are rotatablely connected.This reality Installation and removal with novel middle knuckle and front axle are more convenient, conducive to the replacement and maintenance of the utility model.

It as a further improvement of the utility model, further include outer bearing stopping device, the outer bearing stopping device Including locking nut and floor clip, the locking nut is threadedly coupled with knuckle, and the floor clip, which is set in, to be turned To on section, the locking nut resists the inner ring of outer bearing by floor clip.The utility model is arranged outer bearing retaining and fills It sets, position of the outer bearing on knuckle is fixed, prevents outer bearing from moving on knuckle.

Fixed pin holes are radially provided on the knuckle as a further improvement of the utility model, it is described Split pin is set in fixed lock-joint, and the split pin and floor clip are located at the two sides of locking nut.The utility model Split pin is set, prevents locking nut from loosening.

One end on wheel hub described in as a further improvement of the utility model, far from front axle is removably arranged useful In outer bearing stopping device is sealed in the wheel hub cover in wheel hub, tapped through hole, the screw thread are provided on the wheel hub cover The oil fill plug being threadedly engaged with it is provided in through-hole.Wheel hub cover is arranged in the utility model, protects the axis being mounted in wheel hub It holds, lubricating oil can be added into wheel hub by tapped through hole.

Multiple be used for along the circumferential direction is provided on the brake plunger as a further improvement of the utility model, Place the spring mounting hole of spring, the spring is arranged in spring mounting hole, the both ends of spring respectively with spring mounting hole Bottom and brake inner end cap abut against.The utility model opens up spring mounting hole, facilitates the installation of spring and the positioning of spring.

It is identical as spring mounting hole to be equipped with quantity for the brake plunger as a further improvement of the utility model, And the coaxial oil-through hole with spring mounting hole, the oil-through hole run through the both ends of brake plunger, and described excessively oily The diameter in hole is less than the diameter of spring mounting hole, radially opens up on the end face that brake plunger is used to fit with brake(-holder) block One end of the deep gouge for having quantity equal with oil-through hole, the deep gouge is communicated with oil-through hole, and the other end is through brake plunger Outer end face.The utility model can reduce resistance to sliding between brake piston and brake(-holder) block, keep cavity inner temperature distribution more equal The even normal work to guarantee normally closed type wet brake.

Further including as a further improvement of the utility model, can across brake inner end cap and the brake casing Vent valve seat of the installation of disassembly for communicating with toroidal cavity is provided with breather valve in the vent valve seat.When to annular In cavity when filling brake fluid pressure oil, breather valve, which is vented outwards to hydraulic oil from exhaust valve, to flow out, and tightens exhaust valve, guarantees annular Without air in cavity.

The vent valve seat includes fixed section and construction section as a further improvement of the utility model, and described is logical The first venthole through fixed section and construction section is provided in air valve seat, first venthole includes the first venthole unit With the second venthole unit, the diameter of the first venthole unit less than the second venthole unit diameter, described For communicating with toroidal cavity, the breather valve is mounted in the second venthole unit and leads to second one venthole unit Stomata unit is threadedly coupled, and the breather valve is located at the sealed end that one end in the second venthole unit is taper, described The diameter of sealed end bottom is greater than the diameter positioned at the first venthole unit, is provided with the along its axis direction on the breather valve Two ventholes are radially provided with third venthole, the both ends difference of the third venthole on breather valve at sealed end For being connected to the second venthole unit and the second venthole, the sealed end is bonded for real with the first venthole unit end The sealing of existing vent valve seat.The utility model passes through the conical surface and the first venthole unit matching of sealed end, to play open and close And vent valve seat.

As the further improvement of the utility model, losing heart through its two sides is provided in the brake inner end cap Hole, breather plug is provided in the bleeder port, and the breather plug includes ventilation plug body, breather plug ball, breather plug spring With ventilation cock cap, discouraged through-hole is provided in the ventilation plug body along its length, the discouraged through-hole includes first The diameter of bleeder port unit and the second bleeder port unit, the first bleeder port unit is greater than the straight of the second bleeder port unit The diameter of diameter, the breather plug ball is greater than diameter of the diameter less than the first bleeder port unit of the second bleeder port unit, described Breather plug ball be located in the first bleeder port unit, the breather plug spring is located in the first bleeder port unit and its both ends It is respectively held against breather plug ball and ventilation cock cap, is radially provided in the ventilation plug body and is communicated with the first bleeder port unit Exhaust hole, the ventilation plug body far from ventilation cock cap one end be threadedly coupled with bleeder port.The utility model setting Breather plug can keep air pressure in the utility model in the normal range.

In conclusion the beneficial effects of the utility model are: the utility model passes through to sealing ring in the prior art Simultaneously corresponding baffle is arranged in the improvement of shape, solve in the prior art wet brake due to sealing ring twists, roll, The technological deficiency of permeability, oil leak caused by the problems such as inordinate wear had both improved the service life of the utility model, had in turn avoided Due to caused by permeability, oil leak the problems such as environmental pollution.

Detailed description of the invention

Fig. 1 is the main view of the utility model.

Fig. 2 is the top view of the utility model.

Fig. 3 is the structural schematic diagram for reflecting normally closed type wet brake in the utility model.

Fig. 4 is the partial schematic diagram for reflecting the first sealing ring in the application.

Fig. 5 is the partial schematic diagram for reflecting the second sealing ring in the application.

Fig. 6 is the structural schematic diagram for reflecting brake plunger in the utility model.

Fig. 7 is the structural schematic diagram for reflecting brake(-holder) block in the utility model.

Fig. 8 is the structural schematic diagram for reflecting friction plate in the utility model.

Fig. 9 is the stereogram exploded view that front axle is connect with knuckle in reflection the utility model.

Wherein: 101, brake inner end cap；102, brake casing；103, brake outer end cap；104, brake plunger； 105, spring；106, friction plate；107, brake(-holder) block；108, external tooth；109, internal tooth；110, first annular protrusion；111, the second ring Shape protrusion；112, toroidal cavity；113, fuel feed hole；114, first annular slot；115, the first sealing ring；116, first flap； 117, the second annular groove；118, the second sealing ring；181, third sealing unit；182, the 4th sealing unit；119, second flap； 120, spring mounting hole；121, oil-through hole；122, deep gouge；123, vent valve seat；124, breather valve；125, the first venthole list Member；126, the second venthole unit；127, sealed end；128, the second venthole；129, third venthole；130, fixed section； 131, construction section；132, seal washer；133, seal washer；134, the first O-ring seals；135, outer end cap protrusion；136, Two O-ring seals；137, oil filler point；138, plug screw；140, the first installation through-hole；141, the second installation through-hole；142, the 4th peace Fill through-hole；143, friction plate installation through-hole；144, brake(-holder) block installation through-hole；145, oiling through-hole；146, oilhole；147, the first peace Fill hole；148, first through hole；149, bleeder port；150 breather plugs；501, ventilation plug body；502, breather plug ball；503, breather plug Spring；504, ventilation cock cap；505, the first bleeder port unit；506, the second bleeder port unit；507, exhaust hole；151, first Sealing unit；152, the second sealing unit；153, knuckle；154, wheel hub；155, track rod lever；156, track rod Assembly；157, drag link arm；158, inner bearing；159, outer bearing；160, upper stub mounting hole；161, lower stub installation Hole；162, stub connecting hole；163, locking nut；164, floor clip；165, split pin；166, wheel hub cover；167, screw thread is logical Hole；168, oil fill plug；169, combination oil seal；170, front axle；171, first level through-hole；172, the second horizontal through hole；173, Stub；174, the first steering arm mounting portion；175, upper hexagon slotted nut；176, the second steering arm mounting portion；177, lower hexagonal Slotted nut；178, rod assembly mounting hole；179, rod assembly mounting rod；180, hexagon slotted nut；183, fixation hole is sold； 184, lock pin；185, hex nut.

Specific embodiment

Specific embodiment of the present utility model is described further with reference to the accompanying drawing.

Front axle assembly equipped with normally closed type wet brake as Figure 1-Figure 8, including 170, two, front axle turn respectively The dynamic knuckle 153 that 170 both ends of front axle are set, the wheel hub 154 for installing front-wheel, be mounted on it is normally closed on knuckle 153 Rotating vane type brake, two track rod levers 155 being separately positioned on two knuckles 153 connect two horizontal drawings of steering The track rod assembly 156 of lever arm 155 and the steering being disposed therein on a knuckle 153 for connecting with diverter are straight Tie rod arm 157, the wheel hub 154 are provided with external splines close to one end of front axle 170, and the wheel hub 154 passes through inner bearing 158 and outer bearing 159 be rotatably arranged on knuckle 153, the normally closed type wet brake includes brake inner end cap 101, brake casing 102, brake outer end cap 103, brake plunger 104, more springs 105, friction plate 106 and brake(-holder) block 107, the brake inner end cap 101 and brake outer end cap 103 are detachably arranged in the two of brake casing 102 respectively It holds, is provided with the first installation through-hole 140 through its both ends along its axis direction in the brake inner end cap 101, it is described The second installation through-hole 141 is provided with along its axis direction on brake outer end cap 103, along its axis side on the brake casing To third installation through-hole (not shown) is provided with, the 4th is provided with along its axis direction on the brake plunger 104 and is installed Through-hole 142 is provided with friction plate installation through-hole 143 on the friction plate 106, brake(-holder) block installation through-hole is provided on brake(-holder) block 107 144, the outer diameter of the brake(-holder) block 107 is greater than the outer diameter of friction plate 106, and the internal diameter of the brake(-holder) block 107 is greater than friction plate 106 outer diameter, the inner surface of the friction plate 106 are provided with the internal tooth 109 for matching with the spline on automotive hub, The outer round surface of the brake(-holder) block 107 is provided with the external tooth 108 for matching with the internal spline in brake casing 102, Internal spline is arranged close to one end of brake outer end cap 103 in third installation through-hole inner surface described in the utility model, described Brake(-holder) block 107 quantity than friction plate 106 quantity more than one, and the brake(-holder) block 107 replaces with friction plate 106 and sets It sets, the brake plunger 104 is arranged in brake casing 102 close to one end of brake inner end cap 101 and can be Axial direction in brake casing 102 along brake casing 102 is moved for squeezing brake(-holder) block 107, and the utility model is preferred The quantity of brake(-holder) block 107 be four, the quantity of friction plate 106 is three, and the two sides of each friction plate 106 are provided with one Brake(-holder) block 107, the brake plunger 104 are mounted in third installation through-hole, when in use, the application are mounted on automobile On axle housing, automobile axle housing passes through the first installation through-hole 140, the 4th installation through-hole 142, brake(-holder) block installation through-hole 144, friction plate peace Through-hole 143 and the second installation through-hole 141 are filled, the side of automotive hub is protruded into the application from the second installation through-hole and its end Spline matched with the internal tooth 109 on friction plate 106, the internal diameter of brake(-holder) block 107 is greater than the major diameter of automotive hub upper spline, because In automobile normal running, the friction plate 106 and automotive hub are rotated synchronously for this, and the brake(-holder) block 107 due to Brake casing 102 is connected by external splines, therefore brake(-holder) block 107 is static relative to brake casing 102, works as automobile brake When, 107 extrusion friction piece 106 of brake(-holder) block prevents friction plate 106 from rotating, and friction plate 106 and brake(-holder) block 107 are opposing stationary at this time, And friction plate 106 prevents automotive hub from rotating, and automobile is made finally to stop.

The specific structure for realizing that front axle 170 is connect with knuckle 153 in the utility model is: in the knuckle 153 On side for being connect with front axle 170 be provided with upper protrusion and lower convexity, formed and used between the upper protrusion and lower convexity Between installation the wearing of front axle 170, upper stub mounting hole 160 and lower stub are offered respectively in the upper protrusion and lower convexity A stub connecting hole 162, upper 160 He of stub mounting hole is respectively arranged in mounting hole 161, the both ends of the front axle 170 Lower 161 coaxial line of stub mounting hole, the end of the front axle 170 is located between upper protrusion and lower convexity, and stub connects Hole 162, upper stub mounting hole 160 and lower stub mounting hole 161 are coaxial, the upper stub mounting hole 160, stub connecting hole 162 and lower stub mounting hole 161 connected using stub 173, close to stub connecting hole 162 on front axle described in the utility model And the side far from knuckle 153 is provided with the pin fixation hole 183 through its front and rear sides, and the stub 173 is cylinder Pin, side wall are radially provided with lock pin link slot, and the inner wall of the lock pin link slot is equipped with the first lozenges, in the utility model Lock pin 184 is provided in pin fixation hole 183,184 outer peripheral surface of lock pin is equipped with the second lozenges, second lozenges It is matched with the first lozenges to fix stub 173, the head of lock pin 184 described in the utility model is provided with and its screw thread The hex nut 185 of connection, one end of the drag link arm 157 are mounted on the top of knuckle 153, specific implementation knot Structure is: the utility model is provided with first level through-hole 171 in the upper one end far from normally closed type wet brake of upper protrusion, described Drag link arm 157 is in U-shape, and one end is the first steering arm mounting portion 174, and the first steering arm mounting portion 174 is worn It is provided with the upper hexagon slotted nut 175 being threadedly engaged with it after crossing first level through-hole 171, and is installed in the first steering arm The fixed upper hexagon slotted nut 175 of split pin (not shown), one end installation of track rod lever 155 are set in portion 174 On lower convexity, concrete implementation structure is: in the present invention far from normally closed type wet brake on the lower convexity Side be provided with the second horizontal through hole 172, one end of the track rod lever 155 is the second steering arm mounting portion 176, institute The the second steering arm mounting portion 176 stated is provided with the lower hexagonal fluting spiral shell being threadedly engaged with it after passing through the second horizontal through hole 172 Mother 177, and split pin is set with hexagon slotted nut 177 under fixation on the second steering arm mounting portion 176, the steering is horizontal Position lever arm 155 is provided with the total mounting hole 178 of pull rod, the track rod assembly 156 far from one end of the second horizontal through hole 172 End be provided with perpendicular rod assembly mounting rod 179, it is total that the rod assembly mounting rod 179 is upward through pull rod It is provided at mounting hole 178 and on the top of rod assembly mounting rod 179 hexagon slotted nut 180 being threadedly coupled with it, The upper end of rod assembly mounting rod 179 is provided with split pin to prevent hexagon slotted nut 180 from rotating, the other end and steering are horizontal Rod assembly 156 is rotatablely connected, and the utility model is preferably opened on upper stub mounting hole 160 and lower stub mounting hole 161 There is fixation hole (not shown), in the pin for connecting upper stub mounting hole 160, stub connecting hole 162 and lower stub mounting hole 161 On be provided with threaded hole (not shown) corresponding with fixation hole, the utility model use across fixation hole and on pin Pin and upper stub mounting hole 160 and lower stub mounting hole 161 are fixed together by the bolt that threaded hole is threadedly engaged, and described is upper It is not relatively rotated between stub mounting hole 160 and lower stub mounting hole 161 and pin.

The utility model is provided with outer bearing stopping device, and the outer bearing stopping device includes 163 He of locking nut Floor clip 164, the locking nut 163 are threadedly coupled with knuckle 153, and the floor clip 164 is set in steering On section 153, the locking nut 163 resists the inner ring of outer bearing 159 by floor clip 164, on the knuckle 153 It is radially provided with fixed pin holes (not shown), split pin 165, the split pin are set in the fixed pin holes 165 are located at the two sides of locking nut 163 with floor clip 164.

The one end of the utility model on the wheel hub 154 far from front axle 170 is removably provided with for by outer shaft The wheel hub cover 166 that stopping device is sealed in wheel hub 154 is held, tapped through hole 167 is provided on the wheel hub cover 166, it is described The oil fill plug 168 being threadedly engaged with it is provided in tapped through hole 167.Knuckle 153 in the utility model includes connection Flange, the brake inner end cap is detachably arranged on connecting flange by bolt, in connecting flange far from front axle Side is provided with installation axle, and the installation axle includes the first installation axle unit, the second installation axle unit, third installation axle unit With the 4th installation axle unit, the first installation axle unit, third installation axle unit and the 4th installation axle unit are cylinder One end of shape, the described first installation axle unit is fixed with connecting flange, and the diameter of the first installation axle unit is greater than the The diameter of three installation axle units, described second installs the in a circular table shape of axle unit, and the both ends point of the second installation axle unit Not Lian Jie the first installation axle unit and third axle unit is installed, one end of the described 4th installation axle unit and third this dress axis list Member is fixedly connected far from one end of the second installation axle unit, and is provided with screw thread, this reality on the 4th installation axle unit Axle unit, third installation axle are installed with connecting flange preferred in novel, upper protrusion, lower convexity, the first installation axle unit, second Unit and the molding manufacture of the 4th installation axle cell body, the inner bearing and outer bearing are tapered roller bearing, described Internal bearing sleeve is located on the first installation axle unit inner ring and connection method with the first installation axle unit interference fit and inner bearing End ring is provided between orchid, the outer ring of the inner bearing and wheel hub are interference fitted, and the outer bearing sleeve is located at third It installs on axle unit and is interference fitted with third installation axle unit, the outer ring of the outer bearing and wheel hub are interference fitted, institute The wheel hub stated passes through the second installation through-hole close to one end of front axle, and brake(-holder) block installation through-hole and friction plate installation through-hole protrude into the 4th In installation through-hole.

The both ends of spring 105 described in the utility model point are against brake inner end cap 101 and brake plunger 104 On, the spring 105 is in compressive state and stretches with the movement of brake plunger 104, due in the utility model 105 normal condition of spring be in compression shape at therefore it pushes brake(-holder) block 107, the utility model in normal shape always under In on-position, when car starts, brake plunger 104 is mobile towards the direction of brake inner end cap 101, the utility model On-position is released, the utility model is preferably along the circumferential direction uniformly provided on the brake plunger 104 multiple For placing the spring mounting hole 120 of spring 105, the spring 105 is arranged in spring mounting hole 120, and the two of spring 105 End is abutted against with the bottom of spring mounting hole 120 and brake inner end cap 101 respectively, and the spring 105 in the utility model is preferred Using Rectangular Section Spring.It is identical as spring mounting hole 120 that brake plunger 104 described in the utility model is equipped with quantity And the oil-through hole 121 coaxial with spring mounting hole 120, the oil-through hole 121 run through the both ends of brake plunger 104, i.e., One of oil-through hole 121 in the utility model constitutes the second level for running through 104 both ends of brake plunger with spring mounting hole 120 Stepped hole, and the diameter of the oil-through hole 121 is less than the diameter of spring mounting hole 120, in spring mounting hole 120 and excessively oily Hole 121 communicates place, forms the shoulder in two stage steps hole, one end of the spring 105 resists the shoulder, in brake plunger 104 are used for the deep gouge 122 equal with oil-through hole 121 with quantity is radially offered on the end face that brake(-holder) block 107 fits, described One end of deep gouge 122 communicated with oil-through hole 121, the other end runs through the outer end face of brake plunger 104.

Brake plunger 104 described in the utility model close to one end of brake inner end cap outer surface towards braking The direction of device shell 102 extends to form first annular raised 110, and the inner surface at 102 middle part of brake casing is towards system The direction of actuator piston 104 extends to form the second annular protrusion 111, described first annular raised 110, the second annular protrusion 111, toroidal cavity 112 is formed between brake plunger 104 and brake casing 102, is provided on the brake casing 102 The fuel feed hole 113 communicated with toroidal cavity 112, brake fluid pressure oil pass in and out toroidal cavity 112 from fuel feed hole 113 to push brake Piston 104 moves in brake casing 102, and described first annular raised 110 with brake casing 102 for fitting It is provided with first annular slot 114 on face, the first sealing ring 115 that section is T shape, institute are provided in the first annular slot 114 The first sealing ring 115 stated includes the first sealing unit 151 that section is rectangle and the second sealing unit that section is arc 152, first sealing unit 151 is made with the integrated molding of the second sealing unit 152, in second sealing unit 152 two sides are respectively arranged an annular first flap 16, the maximum width of second sealing unit 152 and two first The sum of thickness of baffle 116 is equal with the width of the first sealing unit 151 and is used for and first slightly larger than brake casing 102 Annular protrusion 111 matches the internal diameter at place, second sealing unit 152 maximum gauge radial along brake casing 102 Equal along the radial thickness of brake casing 102 with first flap 116, first sealing unit 151 is far from the second sealing The surface of unit 152 is used to fit with the slot bottom of first annular slot 114, and first sealing unit 151 is along arrester shell The axial width of body 102 is equal with the width of first annular slot 114, and second annular protrusion 111 is used for living with brake Plug is provided with the second annular groove 117 on 104 surface that fits, and that section is T shape is provided in second annular groove 117 Two sealing rings 118, second sealing ring 118 is the third sealing unit 181 of rectangle including section and section is arc 4th sealing unit 182, the two sides of the 4th sealing unit 182 are each provided with an annular second flap 119.This reality Similar to the structure of the first sealing ring 115 with the second sealing ring 118 in novel, difference is that the second sealing unit 152 is arranged On the outer surface of the first sealing unit 151, and the 4th sealing unit 182 is arranged on the inner surface of third sealing unit 181. Fuel feed hole 113 described in the utility model is in brake casing 102, and the center line of the fuel feed hole 113 and braking The centerline parallel of device piston 104 is provided with a note corresponding with fuel feed hole 113 in the brake inner end cap 101 Oil hole 145 is used to inject brake fluid pressure oil into the utility model, and the oiling through-hole 145 communicates simultaneously with fuel feed hole 113 And the two coaxial line, one is radially provided on the brake casing 102 for being connected to fuel feed hole 113 and annular transluminal 112 oilhole 146, the brake fluid pressure oil in the utility model is injected from oiling through-hole 145, via fuel feed hole 113 and oilhole 146 Brake fluid into annular transluminal 112, to push brake plunger 104 to move in brake casing 102, in the utility model Pressure oil enters toroidal cavity 112, pushes brake plunger 104 mobile towards the direction of brake inner end cap 101, at this time spring 105 are further compressed, pressure releases of the brake piston to brake(-holder) block 107, pressure between brake(-holder) block 107 and friction plate 106 Corresponding to release, automotive hub can rotate, and realize brake release, when brake fluid pressure oil is flowed out from toroidal cavity 112, spring 105 elongations, the direction for pushing brake plunger 104 towards brake(-holder) block 107 is mobile and squeezes brake(-holder) block 107, and brake(-holder) block 107 is to rubbing Pad 106 generates extruding, prevents automotive hub from rotating, realizes the braking of automobile.

The utility model is provided through brake inner end cap 101 and the brake casing 102 is removably installed Vent valve seat 123 for communicating with toroidal cavity 112, breather valve 124 is provided in the vent valve seat 123, this is practical Novel middle vent valve seat 123 and the specific structure of breather valve 124 are: the vent valve seat 123 includes fixed section 130 and installation Section 131, is provided with the first venthole through fixed section 130 and construction section 131 in the vent valve seat 123, and described first Venthole includes the first venthole unit 125 and the second venthole unit 126, the diameter of the first venthole unit 125 Less than the diameter of the second venthole unit 126, the first venthole unit 125 is described for communicating with toroidal cavity 112 Breather valve 124 be mounted in the second venthole unit 126 and be threadedly coupled with the second venthole unit 126, specifically pacifying It is provided with external screw thread in dress section 131, internal screw thread, the outer spiral shell on the construction section 131 are set in the second venthole unit 126 Line matches with the internal screw thread in the second venthole unit 126 and breather valve 124 is detachably arranged in vent valve seat 123, The breather valve 124 is located at the sealed end 127 that one end in the second venthole unit 126 is taper and in breather valve 124 Be arranged sealed end 127 one end be provided with one section of diameter be slightly less than setting external screw thread at diameter smooth section, the smooth section it is straight Diameter is equal with the diameter of 117 bottom of sealed end, and the diameter of 127 bottom of sealed end, which is greater than, is located at the first venthole unit 125 diameter is provided with the second venthole 128 along its axis direction on the breather valve 124, close to sealing on breather valve 124 It holds and is radially provided with third venthole 129 in the smooth section at 127, the both ends of the third venthole 129 are respectively used to connect Logical second venthole unit 126 and the second venthole 128, the sealed end 127 are bonded with 125 end of the first venthole unit For realizing the sealing of vent valve seat 123, the utility model is by turning breather valve 124, and adjustment breather valve 124 is in the second ventilation Position in hole unit 126, when the end of the conical surface and the first venthole unit 125 of the sealed end of breather valve 124 fits closely When, the first venthole unit 125 is blocked, prevents brake fluid pressure oil from flowing out from breather valve 124, is kept in toroidal cavity 112 Oil pressure.The utility model is provided with the first mounting hole 147 along its axial direction on the brake casing 102, in brake casing On be radially provided with first through hole 148 for being connected to toroidal cavity 112 and the first mounting hole 147, first installation Internal screw thread is set in hole 147, is provided with external screw thread on the fixed section 130, external screw thread on the fixed section 130 and the Internal screw thread in one mounting hole 147 matches, the installation of realization vent valve seat 123 and brake casing 102, in the utility model First mounting hole 147 is blind hole, and the depth of first mounting hole 147 is greater than the length of fixed section 130, Gu When determining the length of section 130 to be mounted on the fixed section 130 in first mounting hole 147, not stopping first through hole 148 is Foundation.The outer diameter of fixed section 130 described in the utility model is less than the outer diameter of construction section 131, covers on the fixed section 130 Equipped with seal washer 132, the two sides of the seal washer 132 abut end and the brake casing 102 of construction section 131 respectively End face, to enhance the leakproofness of vent valve seat 123 Yu brake casing 102.

In the utility model is provided on the face that the brake inner end cap 101 is used to connect with brake casing 102 End cap annular groove 133 is provided with the first O-ring seals 134 in the inner end cap annular groove 133.The brake outer end The direction of side towards brake casing 102 on lid 103 for connecting with brake casing 102 is provided with the outer end cap of annular Protrusion 135, the diameter of the outer end cap protrusion 135 is less than the diameter of brake outer end cap 103 and the outer end cap is convex The outer diameter for playing 135 is slightly less than third installation through-hole close to the diameter of 103 one end of brake outer end cap, in brake outer end cap 103 When being mounted on brake casing 102, the outer end cap protrusion 135 is protruded into third installation through-hole, the arrester shell One end that body 102 is connected with brake outer end cap 103 is provided with chamfering, the outer end cap protrusion 135, brake outer end cap 103 and brake casing 102 on chamfering between Formation cross-section be triangle triangular cavity, in the triangular cavity It is provided with the second O-ring seals 136.

Oil filler point 137, the oil filler point 137 and arrester shell are radially provided on the brake casing 102 Third installation through-hole on body 102 is used to install brake(-holder) block 107 and the position of friction plate 106 communicates, in the oil filler point 137 It is provided with the plug screw 138 being threadedly coupled with it, lubricating oil can be added into the application by opening bolt 138, existed to the application The bearing installed on automotive hub when use is lubricated.

The utility model is provided with the bleeder port for communicating with third installation through-hole in the brake inner end cap 101 149, breather plug 150 is installed in bleeder port, the breather plug 150 includes ventilation plug body 501, breather plug ball 502, leads to Vent plug spring 503 and ventilation cock cap 504, the both ends of the ventilation plug body 501 are provided with external screw thread, the breather plug Discouraged through-hole is provided on ontology 501 along its length, the discouraged through-hole is 505 He of the first bleeder port unit by communicating The diameter in the two stage steps hole that the second bleeder port unit 506 is constituted, the first bleeder port unit 505 is greater than the second bleeder port The diameter of unit 506, the discouraged plug ball 502 preferably use steel ball, and the diameter of the steel ball is greater than the second bleeder port Less than the diameter of the first bleeder port unit 505, the steel ball is placed in the first bleeder port unit 505 diameter of unit 506, The section of the ventilation cock cap 504 is U-shaped, and the ventilation plug body 501 outwardly protrudes shape far from one end of bleeder port 49 At stop collar, 504 sets of the described ventilation cock cap on ventilation ontology 501 and in the opening punching press inwardly of ventilation cock cap 504, Make outer diameter of 504 opening width of cock cap less than stop collar of ventilating at punching press, cock cap 504 of ventilating at this time can rotate on ventilation ontology It cannot be fallen from ventilation cock cap with moving, the breather plug spring 503 is mounted in the first bleeder port unit 505, and And the both ends of the breather plug spring 505 head on steel ball and ventilation cock cap 504 respectively, the utility model is in the breather plug The exhaust hole 507 communicated with the first bleeder port unit 505, the exhaust hole 507 are radially provided on ontology 501 Setting with ventilation cock cap 504 for matching in plug body 501 of ventilating between steel ball and ventilation cock cap 504, in the application The diameter at externally threaded position is greater than the diameter opened up at exhaust hole 507, and the ventilation plug body 501 is far from ventilation cock cap 504 one end is threadedly coupled with bleeder port 149, and after temperature increases in the application, air pressure increases, and gas can pass through bleeder port 149 push steel ball to squeeze breather plug spring 503, move to and the second bleeder port when steel ball squeezes breather plug spring 503 to steel ball When 506 end of unit does not contact, gas can be discharged out of exhaust hole 507, reduce the air pressure in the utility model, when this is practical When air pressure in novel restores, breather plug spring 503 restores to the original state, i.e., steel ball is pushed to by the elongation of breather plug spring 503 blocks Second bleeder port unit 506 can keep air pressure in the utility model in the normal range at this time.The utility model is described One end in the second installation through-hole 141 on brake outer end cap 103 far from brake casing 102 is provided with combination oil seal 169, For enhancing the leakproofness between the utility model and automotive hub, combination oil seal 169 itself in the utility model and its with The mounting means of brake outer end cap 103 is the prior art, the improvement of non-the utility model, therefore to its specific structure And the installation with brake outer end cap 103, the utility model are not described in detail.

It is provided with fixed hole in brake inner end cap 101 and brake outer end cap 103 in the utility model, it is described The both ends of brake casing 102 are provided with fixing screwed hole, and the brake inner end cap 101 and brake outer end cap 103 are logical Cross the both ends that bolt is detachably arranged in brake casing 102 respectively.The utility model is in the brake inner end cap 101 On be along the circumferential direction provided with multiple threaded hole (not shown)s for being detachably arranged on automobile axle housing, this reality With it is novel when in use, brake inner end cap 101 is detachably arranged in automobile axle housing by the bolt being threadedly engaged with threaded hole On, to realize the utility model integral installation on automobile axle housing.

Not doing the part illustrated in above instructions is the prior art, or has both been able to achieve by the prior art. And specific implementation case described in the utility model is only the preferable case study on implementation of the utility model, is not used to limit The scope of the utility model.Equivalent changes and modifications made by i.e. all contents according to present utility model application the scope of the patents, It all should be used as the technology scope of the utility model.

Claims (10)

1. a kind of front axle assembly equipped with normally closed type wet brake, it is characterised in that: turn respectively including front axle (170), two It is dynamic to be arranged in the knuckle (153) at front axle (170) both ends, the wheel hub (154) for installing front-wheel, be mounted on knuckle (153) On normally closed type wet brake, two be separately positioned on two knuckles (153) track rod levers (155), connection The track rod assembly (156) of two track rod levers (155) and be disposed therein on a knuckle (153) for The drag link arm (157) of diverter connection, the wheel hub (154) are provided with external splines close to the one end of front axle (170), The wheel hub (154) is rotatably arranged on knuckle (153) by inner bearing (158) and outer bearing (159), and described is normally closed Rotating vane type brake includes brake inner end cap (101), brake casing (102), brake outer end cap (103), brake work Fill in (104), more springs (105), friction plate (106) and brake(-holder) block (107), the brake inner end cap (101) and braking Device outer end cap (103) is detachably arranged in the both ends of brake casing (102), the quantity of the brake(-holder) block (107) respectively It is one more than the quantity of friction plate (106), and the brake(-holder) block (107) is arranged alternately with friction plate (106), the system The outer round surface of movable plate (107) is provided with the external tooth (108) for matching with the internal spline in brake casing (102), institute The bore area for the friction plate (106) stated is provided with the internal tooth (109) for matching with the spline on wheel hub (154), described Brake plunger (104) be arranged in brake casing (102) close to brake inner end cap (101) one end and can make It is mobile for squeezing brake(-holder) block (107), the spring along the axial direction of brake casing (102) in dynamic device shell (102) (105) both ends point are against in brake inner end cap (101) and brake plunger (104), and the spring (105) is in compression State and flexible with the movement of brake plunger (104), the outer round surface of the brake plunger (104) is towards braking The direction of device shell (102) extends to form first annular raised (110), the inner surface of the brake casing (102) towards The direction of brake plunger (104) extends to form the second annular protrusion (111), first annular raised (110), the second ring Toroidal cavity (112) are formed between shape protrusion (111), brake plunger (104) and brake casing (102), the braking The fuel feed hole (113) communicated with toroidal cavity (112) is provided on device shell (102), brake fluid pressure oil enters from fuel feed hole (113) Toroidal cavity (112) is to push brake plunger (104) to move in brake casing (102), the first annular protrusion (110) it is provided with first annular slot (114) on the face for fitting with brake casing (102), the first annular slot (114) the first sealing ring (115) that section is T shape is provided in, first sealing ring (115) includes that section is rectangle First sealing unit (151) and section are the second sealing unit (152) of arc, in second sealing unit (152) An annular first flap (116) is respectively arranged in two sides, and second annular protrusion (111) is used for and brake plunger (104) it is provided on the surface to fit the second annular groove (117), it is T shape that section is provided in second annular groove (117) The second sealing ring (118), second sealing ring (118) include section be rectangle third sealing unit (1181) and section Face is the 4th sealing unit (182) of arc, and the two sides of the 4th sealing unit (182) are each provided with one annular the Two baffles (119).

2. the front axle assembly according to claim 1 equipped with normally closed type wet brake, it is characterised in that: the steering Side on section (153) for connecting with front axle (170) is provided with upper stub mounting hole (160) and lower stub mounting hole (161), institute The both ends for the front axle (170) stated respectively are provided with a stub connecting hole (162), the upper stub mounting hole (160) and lower stub Mounting hole (161) coaxial line, the upper stub mounting hole (160), stub connecting hole (162) and lower stub mounting hole (161) Inside it is provided with stub (173) connection for connecting front axle (170) and knuckle (153), the drag link arm (157) One end be fixedly connected with the top of knuckle (153), the lower part of one end of track rod lever (155) and knuckle (153) It is fixedly connected, the other end and track rod assembly (156) are rotatablely connected.

3. the front axle assembly according to claim 2 equipped with normally closed type wet brake, it is characterised in that: further include outer shaft Stopping device is held, the outer bearing stopping device includes locking nut (163) and floor clip (164), the locking screw Female (163) are threadedly coupled with knuckle (153), and the floor clip (164) is set on knuckle (153), the lock Tight nut (163) resists the inner ring of outer bearing (159) by floor clip (164).

4. the front axle assembly according to claim 3 equipped with normally closed type wet brake, it is characterised in that: the steering It is radially provided with fixed pin holes on section (153), split pin (165) are set in the fixation lock-joint, the split pin (165) two sides of locking nut (163) are located at floor clip (164).

5. the front axle assembly according to claim 4 equipped with normally closed type wet brake, it is characterised in that: the wheel hub (154) one end on far from front axle (170) is removably provided with for outer bearing stopping device to be sealed in wheel hub (154) Wheel hub cover (166), be provided with tapped through hole (167) on the wheel hub cover (166), setting in the tapped through hole (167) There is the oil fill plug (168) being threadedly engaged with it.

6. the front axle assembly according to claim 5 equipped with normally closed type wet brake, it is characterised in that: in the system It is along the circumferential direction provided on actuator piston (104) multiple for placing the spring mounting hole (120) of spring (105), the bullet Spring (105) setting in the spring mounting hole (120), the both ends of spring (105) respectively with the bottom of spring mounting hole (120) and braking Device inner end cap (101) abuts against.

7. the front axle assembly according to claim 6 equipped with normally closed type wet brake, it is characterised in that: the braking Device piston (4) is equipped with quantity oil-through hole identical as spring mounting hole (120) and coaxial with spring mounting hole (120) (121), the oil-through hole (121) runs through the both ends of brake plunger (104), and the diameter of the oil-through hole (121) Less than the diameter of spring mounting hole (120), the edge on the end face that brake plunger (104) are used to fit with brake(-holder) block (107) Radial direction offers the quantity deep gouge equal with oil-through hole (121) (122), one end and oil-through hole (121) of the deep gouge (122) It communicates, the other end runs through the outer end face of brake plunger (104).

8. the front axle assembly according to claim 5 equipped with normally closed type wet brake, it is characterised in that: further include across Brake inner end cap (101) and the brake casing (102) removably installation for being communicated with toroidal cavity (112) Vent valve seat (123) is provided with breather valve (124) in the vent valve seat (123).

9. the front axle assembly according to claim 8 equipped with normally closed type wet brake, it is characterised in that: the ventilation Valve seat (123) includes fixed section (130) and construction section (131), and the vent valve seat is provided on (123) through fixed section (130) and the first venthole of construction section (131), first venthole include the first venthole unit (125) and second Venthole unit (126), the diameter of the first venthole unit (125) less than the second venthole unit (126) diameter, For the first venthole unit (125) for communicating with toroidal cavity (112), the breather valve (124) is mounted on second It is threadedly coupled in venthole unit (126) and with the second venthole unit (126), the breather valve (124) is located at second One end in venthole unit (126) is the sealed end (127) of taper, and the diameter of the sealed end (127) bottom is greater than position In being provided with the second venthole along its axis direction on the diameter of the first venthole unit (125), the breather valve (124) (128), it is radially provided with third venthole (129) at sealed end (127) on breather valve (124), the third ventilation The both ends in hole (129) are respectively used to the second venthole unit (126) of connection and the second venthole (128), the sealed end (127) it is bonded with first venthole unit (125) end for realizing the sealing of vent valve seat (123).

10. according to the described in any item front axle assemblies equipped with normally closed type wet brake of claim 5 to 9, it is characterised in that: It is provided with the bleeder port (149) through its two sides in the brake inner end cap, is provided with ventilation in the bleeder port (149) Fill in (150), the breather plug (150) include ventilation plug body (501), breather plug ball (502), breather plug spring (503) and It ventilates cock cap (504), is provided with discouraged through-hole, the discouraged through-hole along its length in the ventilation plug body (501) Including the first bleeder port unit (505) and the second bleeder port unit (506), the diameter of the first bleeder port unit (505) Greater than the diameter of the second bleeder port unit (506), the diameter of the breather plug ball is greater than the straight of the second bleeder port unit (506) Less than the diameter of the first bleeder port unit (505), the breather plug ball (502) is located in the first bleeder port unit (505) diameter, The breather plug spring (503) is located in the first bleeder port unit (505) and its both ends is respectively held against breather plug ball (502) With ventilation cock cap (504), radially it is provided in the ventilation plug body (501) and is communicated with the first bleeder port unit (505) Exhaust hole (507), the ventilation plug body (501) far from ventilation cock cap (504) one end and bleeder port (149) screw thread Connection.