A kind of light bus machinery halting mechanism brake caliper assy
Technical field
The utility model belongs to field of automobile, particularly a kind of light bus machinery halting mechanism brake caliper assy.
Background technique
Abroad, through development in decades, the technology of producing gas (liquid) press disc type break comparative maturity at present, has formed series product.For example: the annual output such as Bosch (Bosch) company, Wabco break manufacturing company, company of ArvinMeritor is all more than 20-50 ten thousand.In Europe, the United States, Deng developed country, be equipped in using disk type braker as standard piece on multi-level car, passenger vehicle, light card, medium-sized, heavy-duty car.Domestic light card hydraulic pressure four-wheel disk type braker is still blank at present, and what have the release of minority vehicle only is drum brake system after shroud, and after within 2009, Zhengzhou daily output Kai Pusida NT400 releases shroud, drum brake configures.Light passenger train's four-wheel disk type braker has minority vehicle only and releases disk type braker, and 2008 in the new from generation to generation all-cis release four-wheel disk type braker configuration of Jiangling automobile Ford.Along with the raising to light card and light passenger train's automobile brake perfrmance with realize lightweight, more and more adopt disk type braker.Disk type braker is not only easy to realize gap and automatically adjusts, and improves braking reliability, also, than the weight of the drum brake adopting on market light 20%, effectively reduces deadweight.Along with light card and the consumption of light passenger train's automobile market do not stop upgrading, absorb light card leading in the world and light passenger train's automotive engineering, the development trend of car is day by day distinct.The active safeties such as four-wheel disc type brake are equipped with to be arranged and will become the mark of high-end light truck and light passenger train's automobile, and domestic light card and light passenger train's automobile integrate with trend comprehensively quick and the light card in the world and light passenger train's automobile.On Vehicles Collected from Market, be that light passenger train is the most advanced as the Europe of representative take Nanjing IVDEO and all-cis new generation of Jiangling, and then become mark post vehicle.
In recent years, domestic light card and light passenger train's automobile market growth momentum are swift and violent.Particularly transport routes constantly improve and after national fee adjusts, development a new generation is efficient, lightweight, the light card of top grade comfortable, low-carbon (LC) have become the new trend that Chinese light card developed in recent years at home.The intelligent safety systems such as external light card and light passenger train's automobile brand configure in braking system that four-wheel dish is stopped, ABS and EBD have all upgraded to standard configuration.Domestic Qing Ka producer is owing to being subject to the restriction of the factor such as technology and manufacture cost, most ofly adopts traditional drum brake.Light card four-wheel hydraulic brake is blank on market at home, has the very large market space.
In the rear integrated parking brake caliper assembly of existing hydraulic brake structure, because the coaxality of piston and threaded guide rod and adjustment swivel nut is bad, the seizure of piston that is easy to cause.And existing hydraulic brake also exists in the time discharging parking power piston return easily stuck, friction plate and brake disc drag, and drag and not only make the friction plate life-span reduce, and oil consumption is increased, once occur that stuck that just makes whole braking ability inefficacy.
Model utility content
Technical problem to be solved in the utility model is, a kind of light light bus machinery halting mechanism brake caliper assy is provided, can overcome existing deficiency in prior art, prevent seizure of piston, and can solve break piston return defect that easily stuck and friction plate and brake disc drag in the time discharging parking power, braking effect and the riding stability of raising automobile.
The utility model is to realize like this, a kind of light bus machinery halting mechanism brake caliper assy, comprise rear braking clamp body, outside friction disc, inner attrition piece, main sliding axle, secondary sliding axle, sliding axle bolt and mounting bracket, main sliding axle, secondary sliding axle, inner attrition piece, outside friction disc are arranged on rear mounting bracket, and rear braking clamp body connects with described mounting bracket by main sliding axle, secondary sliding axle and sliding axle bolt; In rear braking clamp body, be also provided with piston, piston nose and inner attrition piece laminating; In rear braking clamp body, be also provided with steel ball sleeve, steel ball sleeve screw rod, steel ball, steel ball fixing frame, the front end of steel ball sleeve screw rod is provided with swinging mounting, steel ball fixing frame is arranged between the ear end face and steel ball sleeve of steel ball sleeve screw rod, steel ball is arranged in steel ball fixing frame, be provided with adjustment swivel nut and the threaded guide rod of mutual square flute profile screw-thread fit at piston rear end, threaded guide rod is fixed in piston, adjusts swivel nut and steel ball sleeve and is connected; Adjust on swivel nut and be socketed with spring, spring one end is provided with spring socket sleeve, and its other end is provided with spring socket sleeve packing ring, and spring socket sleeve packing ring is arranged on steel ball sleeve end face; Be provided with spring socket sleeve back-up ring at brake calipers inwall, spring socket sleeve back-up ring can block spring socket sleeve.
Further, be provided with piston dust cover and rectangular seal in rear braking clamp body, piston dust cover is near piston nose portion.
Further, on steel ball sleeve screw rod, be socketed with location cover for seat, positioning seat is set between steel ball sleeve screw rod and rear braking clamp body inwall, and location cover for seat is connected with rear braking clamp body bottom by straight pin, between location cover for seat and steel ball sleeve screw rod, is also provided with anti-attrition pad.
Further, between steel ball sleeve screw rod and rear brake calipers inwall, be also provided with O RunddichtringO and copper sheathing, O RunddichtringO and copper sheathing are along the axial setting of steel ball sleeve screw rod, and O RunddichtringO is near location cover for seat.
Further, be also provided with apron on steel ball sleeve screw rod, apron is arranged between rear braking clamp body and swinging mounting.
Further, on rear braking clamp body, be also provided with fixed support, between fixed support and swinging mounting, connect by torsion spring, fixed support is fixed on rear braking clamp body by hexagon socket head cap screw, and swinging mounting is bolted to the end of steel ball sleeve screw rod by swinging mounting.
Further, between rear braking clamp body and mounting bracket, be provided with support reed I and support reed II.
Further, on rear braking clamp body, be provided with and stop up and bleed screw, stop up the filler opening place that is arranged on rear braking clamp body, on bleed screw, be provided with bleed screw dust cap.
Further, main sliding axle and secondary sliding axle are bolted on rear braking clamp body by sliding axle, and sliding axle dust-proof cover after being socketed with respectively on main sliding axle and secondary sliding axle is socketed with rubber sleeve on secondary sliding axle.
Further, the material of rear braking clamp body is ZL111.
Compared with prior art, the utility model adopts this mechanism well to avoid and adjusting the bad seizure of piston causing of swivel nut coaxality because of internal piston threaded guide rod.Because increased spring socket sleeve packing ring in spring one end, make in the time discharging parking power again, that piston return is difficult for is stuck, drag, and has good reliability and Security.
Accompanying drawing explanation
Fig. 1 is that the master of the utility model one preferred embodiment looks generalized section;
Fig. 2 is that schematic diagram is looked on a left side of Fig. 1;
Fig. 3 is the schematic top plan view of Fig. 1.
Embodiment
In order to make technical problem to be solved in the utility model, technological scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Please refer to shown in Fig. 1 to Fig. 3, the preferred embodiment of a kind of light bus machinery of the utility model halting mechanism brake caliper assy, comprises rear braking clamp body 1, outside friction disc 2, inner attrition piece 3, main sliding axle 34, secondary sliding axle 35, support reed I 26, support reed II 27, sliding axle bolt 24 and mounting bracket 25.Main sliding axle 34, secondary sliding axle 35, inner attrition piece 3, outside friction disc 2, support reed I 26, support reed II 27 are arranged on mounting bracket 25, and rear braking clamp body 1 connects with mounting bracket 25 by main sliding axle 34, secondary sliding axle 35 and sliding axle bolt 24.
The material of rear braking clamp body 1 is ZL111, and a kind of cast aluminium alloy meets national energy-saving and environmental requirement.
In rear braking clamp body 1, be provided with piston 4, piston 4 front ends and inner attrition piece 3 are fitted.In rear braking clamp body 1, be also provided with steel ball sleeve 12, steel ball sleeve screw rod 15, steel ball 13, steel ball fixing frame 14, the front end of steel ball sleeve screw rod 15 is provided with swinging mounting 29, steel ball fixing frame 14 is arranged between the ear end face and steel ball sleeve 12 of steel ball sleeve screw rod 15, and steel ball 13 is arranged in steel ball fixing frame 14.
Piston 4 rear ends are provided with the adjustment swivel nut 11 and threaded guide rod 38 of mutual square flute profile screw-thread fit, and threaded guide rod 38 is fixed in piston 4, adjust swivel nut 11 and are connected with steel ball sleeve 12.Adjust on swivel nut 11 and be socketed with spring 8, spring 8 one end are provided with spring socket sleeve 7, and its other end is provided with spring socket sleeve packing ring 10, and spring socket sleeve packing ring 10 is arranged on steel ball sleeve 12 end faces.Be provided with spring socket sleeve back-up ring 9 at rear braking clamp body 1 inwall, spring socket sleeve back-up ring 9 can block spring socket sleeve 7.Owing to having increased spring socket sleeve packing ring 10 in spring 8 one end, make in the time discharging parking power, that piston 4 returns are difficult for is stuck, brake disc is difficult for dragging with friction plate, the stability of raising the present embodiment.
In rear braking clamp body, 1 is provided with piston dust cover 5 and rectangular seal 6, and piston dust cover 5 is near piston 4 front ends.On steel ball sleeve screw rod 15, be socketed with location cover for seat 17, location cover for seat 17 is arranged between steel ball sleeve screw rod 15 and rear braking clamp body 1 inwall, location cover for seat is connected with rear braking clamp body 1 bottom by straight pin 18, between location cover for seat 17 and steel ball sleeve screw rod 15, is also provided with anti-attrition pad 16.Between steel ball sleeve screw rod 15 and rear braking clamp body 1 inwall, be also provided with O RunddichtringO 19 and copper sheathing 20, O RunddichtringO 19 and copper sheathing 20 are along the axial setting of steel ball sleeve screw rod 15, and O RunddichtringO 19 is near location cover for seat 17.On steel ball sleeve screw rod 15, be also provided with apron 21, apron 21 is arranged between rear braking clamp body 1 and swinging mounting 29.
On rear braking clamp body 1, be also provided with fixed support 28, between fixed support 28 and swinging mounting 29, connect by torsion spring 23, fixed support 28 is fixed on rear braking clamp body 1 by hexagon socket head cap screw 33, and swinging mounting 29 is fixed on the end of steel ball sleeve screw rod 15 by swinging mounting bolt 24.Between rear braking clamp body 1 and mounting bracket 25, be provided with support reed I26 and support reed II27.
On rear braking clamp body 1, be provided with obstruction 30 and bleed screw 31, obstruction 30 is arranged on the filler opening place of rear braking clamp body 1, is provided with bleed screw dust cap 32 on bleed screw 31.Main sliding axle 34 and secondary sliding axle 35 are fixed on rear braking clamp body 1 by sliding axle bolt 24, and sliding axle dust-proof cover 37 after being socketed with respectively on main sliding axle 34 and secondary sliding axle 35 is socketed with rubber sleeve 36 on secondary sliding axle 35.
In the time of needs service brake, step on foot treadle, promote vacuum booster push rod and drive brake master cylinder action, make hydraulic pressure in brake master cylinder increase, hydraulic pressure is delivered in the rear braking clamp body 1 of the present embodiment and promotes piston 4 and moves by Brake hose, piston 4 promotes inner attrition piece 3, with outside friction disc 2 actings in conjunction, brake disc (not shown) is clamped, produce braking force, make the braking force of output steadily, reliably.After service brake is removed, the hydraulic coupling in rear braking clamp body 1 disappears, and the restoring force of rectangular seal 6 takes piston 4 to toward pusher, makes piston 4 returns.
In the time of parking braking, handle pulls the hand brake, pull swinging mounting 29, drive steel ball sleeve screw rod 15 to rotate, three steel balls 13 are enclosed within steel ball fixing frame 14, steadily rise along steel ball sleeve 12 is consistent with steel ball sleeve screw rod 15 inner track, make adjust the gap of swivel nut 11 eliminations and threaded guide rod 38 and make threaded guide rod 38 promote piston 4, piston 4 promotes inner attrition piece 3, with outside friction disc 2 actings in conjunction, brake disc is clamped, produce braking force, parking ouput force is more reliable.After releasing is hand braking, swinging mounting 29 rotates backward and gets back to initial position under the back stretch effect of torsion spring 23, steel ball sleeve screw rod 15 and the steel ball 13 in steel ball sleeve 12 are declined, thereby make to adjust swivel nut 11 returns, and piston 4 return under the effect of rectangular seal 6 restoring forces.
In sum, the utility model by installing a set of mechanical halting mechanism additional in the rear braking clamp body of rear brake caliper assy, make rear brake caliper assy possess service brake, parking braking and three kinds of functions of emergency brake simultaneously, thereby reduce the volume of break, to adapt to the limited space of automobile chassis; And it is simple in structure, easy for installation.Simultaneously, realize the automatic adjustment in service brake, parking braking and parking braking gap, and wheel can locking while discharging parking power, stability and the conformity of braking effect are guaranteed, have good reliability and Security, each wheel can uniformity ground gradual braking under any speed of a motor vehicle to guarantee automobile.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.