CN100383428C - Double thrust disc and double regulating caliper type pneumatic brake device capable of self-regulating braking clearance - Google Patents
Double thrust disc and double regulating caliper type pneumatic brake device capable of self-regulating braking clearance Download PDFInfo
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- CN100383428C CN100383428C CNB200510022535XA CN200510022535A CN100383428C CN 100383428 C CN100383428 C CN 100383428C CN B200510022535X A CNB200510022535X A CN B200510022535XA CN 200510022535 A CN200510022535 A CN 200510022535A CN 100383428 C CN100383428 C CN 100383428C
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Abstract
The present invention relates to a double-thrust disc and double-adjustment caliper type pneumatic brake device with the automatic adjustment of brake clearance. The present invention adopts the technical scheme that the present invention is provided with a brake caliper body and a brake bracket which are in sliding connection through a sliding pair, wherein an inner and an outer brake facings keep a certain distance and are arranged on the lower side of the brake caliper body in a parallel way, and are pressed and leaned against the brake bracket through pressure springs on a fixed pressure plate; a brake air chamber of which the inner cavity is provided with a lever is arranged on the end of the upper side of the brake caliper body, and a tappet is in compression joint with one end of the lever, wherein an automatic clearance adjustment mechanism with the double-thrust disc is arranged in the cavity of the brake caliper body and is connected to a lower cover plate which is in seal connection with the brake caliper body, and a semicircular block is arranged on the other end of the lever, and is hinged with the brake caliper body through a semicircular bearing; a long roller wheel of which the rotation center is different from that of the semicircular block is arranged on the semicircular block and is in compression joint with a cover plate on the automatic clearance adjustment mechanism with the double-thrust disc, and the cover plate is connected to the brake caliper body. The present invention has the advantages of reliable automatic clearance adjustment, stable output of brake force moment, small structural size, convenient replacement of the brake facings, etc.
Description
Technical field
The present invention relates to automotive brake, more particularly, relate to a kind of two caliper type air braking systems of regulating of double-push-disc of brake clearance self-regulated.
Background technique
What generally use on China's truck, passenger vehicle and the trailer at present is drum brake, and its maximum shortcoming is that brake clearance all is to finish by manual adjustment behind the friction disc wear.Automobile running is after a period of time, and brake clearance increases, and braking is weak, and the driver reduces the gap by manual adjustment again.But it is much that the gap will be adjusted, and this just needs the driver that higher technical merit and driving experience are arranged, and will have potential safety hazard as can not in time adjusting.The brake clearance adjustment is the key project in automobile running, maintenance and the reconditioning work, and recent two decades comes, and for the workload that reduces to guarantee to keep in good repair, the brake clearance automatic regulating apparatus is developed rapidly.Drum brake commonly used is had brake clearance and adjusts the corresponding product of function automatically and substitute.In these products, it is by automatic adjustment arm drum brake have been had from conditioning function that part is arranged, but phenomenons such as heating, fading of brake, noise are big will appear in this adjustment arm in use for some time.Automatically it is also very high to adjust the arm requirement on machining accuracy simultaneously, makes its price more much higher than common adjustment arm, and behind the dress braking adjusting arm, the precision of all component of break all needs to improve, and has increased the cost of break so greatly.
On the other hand, because the excessive gaps of drum brake not exclusively is because the wearing and tearing of friction pair cause, some is because the thermal expansion of brake drum causes, adjusts simply as not adding identification ground, may will adjust excessive.Present automatic regulating apparatus can not be transferred greatly owing to turning down, and after the break cooling, break can not thoroughly loosen the phenomenon of will dawdling, even locking phenomenon occurs.
In addition, drum brake is because its reasons in structure, when also existing braking noise big, clamor and be and brake heating and heat fade phenomenon, these phenomenons reflect still be to give prominence on city bus, also be one of reason that causes many traffic accidents.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, design and a kind ofly have the unidirectional reliable self-regulated in gap and intensity, rigidity all better and can export the double-push-disc pair adjusting caliper type air braking systems of a kind of brake clearance self-regulated of bigger braking moment.It is achieved through the following technical solutions:
One braking clamp body and brake holder are arranged, both are slidingly connected by sliding pair, brake chamber places the upside of braking clamp body, tappet on it stretches into braking clamp body inner chamber upside and is crimped on lever one end that places the braking clamp body inner chamber, pressing plate is connected on the braking clamp body, the parallel downside that places braking clamp body of the alternate certain distance of inside and outside brake lining, and be pressed against on the brake holder, wherein by the stage clip on the stationary platen
Inner chamber at described braking clamp body is equipped with the double-push-disc clearance self-regulating mechanism, and this mechanism is connected on the lower cover plate that is tightly connected with braking clamp body,
The other end of described lever is provided with the semicircle piece, and this semicircle piece is hinged by semicircle bearing and braking clamp body, is provided with the long wheel with its different centers of rotation on described semicircle piece, and this long wheel is crimped on the described double-push-disc clearance self-regulating mechanism,
Upside at the pairing braking clamp body of described double-push-disc clearance self-regulating mechanism is provided with the upper cover plate that is tightly connected with braking clamp body, and it is built-in with sensor.
Described double-push-disc clearance self-regulating mechanism comprises push-plate, screw rod, driving shaft, driven shaft, five tooth links, five gears, pressure seat, return spring, unilateral bearing, adjust cover and sprocket driving pair, described screw rod is screwed in the symmetrical both sides of pressure seat, the screw rod lower end does not circumferentially have constraint, axially there is constraint ground to be connected with push-plate, push-plate is pressed against the outside of described inside brake liner, the screw rod inboard is provided with teeth groove, five tooth links and five gears are connected on driving shaft and the driven shaft and peg graft, be engaged in the described teeth groove of screw rod inboard, it is hinged by unilateral bearing and five tooth link one-way rotation to adjust cover, and the sprocket driving auxiliary driving connects driving shaft and driven shaft.
The week that is center of rotation with described semicircle piece on described lever upwards is provided with two turning gears.
Establish on the external circumferential of described adjustment cover and rotation slot is arranged, described turning gear is engaged in this rotation slot.
The sensing of described sensor on it rotated end by being connected with driven shaft is coaxial with the nylon driving component that is connected the driven shaft upper end.
Described pressing plate upside is plugged in the corresponding groove on the braking clamp body, and its downside is provided with concave arc, and a straight pin embeds in this concave arc, and its two ends are crimped on pressing plate on the braking clamp body by cotter pin.
The invention has the beneficial effects as follows: 1) by the assembling unilateral bearing, regulating mechanism can only rotate to a direction, and normal condition can not reverse, and the intensity and the rigidity of mechanism are better simultaneously, make clearance self-regulating more reliable; 2) two push-plates act on the brake lining simultaneously, and braking moment output is steady, and size is linear with air pressure, and braking ability is more stable, make braking steadily; 3) break of the identical braking moment of same output is compared and is had littler physical dimension; 4) brake-lining change is convenient, and only the cotter pin that need pull down stationary platen one side is just conveniently replaced; 5) expand along diametric(al) in the brake disc back that is heated, less to the influence of Braking efficiency and brake clearance, is easier to realize that the gap adjusts automatically; 7) radiating condition is good, does not have friction and helps the gesture effect, and the friction plate temperature raises little, and less to the influence of friction factor, Braking efficiency is more stable, is not easy to take place heat fade, and working life is longer; 8) less after friction surface makes moist, soaks to the Braking efficiency influence, and after twice braking, can recover normal; 9) adopt rotary angle transmitter can accurately reflect the abrasion condition of two braking liners, and can guarantee the timely replacing of brake lining.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is that the A of Fig. 1 is to view
Fig. 3 is the structural representation of double-push-disc clearance self-regulating mechanism
Fig. 4 is lever and semicircle bearing and adjusts the linkage structure of cover and the schematic representation of relative position
Fig. 5 is a M partial enlarged drawing among Fig. 2
Fig. 6 is the schematic representation of stage clip crimping brake lining
1 is brake chamber among the figure, the 2nd, and braking clamp body, the 3rd, brake holder, the 4th, double-push-disc clearance self-regulating mechanism, the 5th, brake disc, the 6th, lever, the 7th, inside brake liner, the 8th, outer inside brake liner, the 9th, upper cover plate, the 10th, stage clip, the 11st, pressing plate, the 12nd, straight pin, the 13rd, cotter pin, the 14th, guide pin bushing, the 15th, screw, the 16th, needle bearing, the 18th, sprocket driving pair, the 17th, pressure seat, the 19th, screw rod, the 20th, screw rod dust arrester, the 21st, push-plate, the 22nd, driving shaft, the 23rd, pad, the 24th, awl spring, the 25th, adjust cover, the 26th, unilateral bearing, the 27th, return spring, 28 is five tooth links, the 29th, and driven shaft, the 30th, driven sprocket, 31 is five gears, the 32nd, and chain, the 33rd, drive sprocket, the 34th, lower cover plate, the 35th, tappet, 36 semicircle bearing holes, 37 half slots, the 40th, sensor, the 41st, nylon driving component, the 42nd, long wheel, the 43rd, fixed support, 44 semicircle pieces, 45 turning gears, 46 rotation slots, the 47th, R groove, the 48th, concave arc, 49 screw boss, the 50th, tapped blind hole.
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Contrast Fig. 1, Fig. 2, braking clamp body 2 places on the brake holder 3, and braking clamp body 2 is provided with guide hole, connects guide pin bushing 14 by screw 15 on the brake holder 3, and braking clamp body 2 moves brake holder 3 by the mobile phase on guide pin bushing 14 of guide hole on it, sees also Fig. 2.Brake chamber 1 places the upside of braking clamp body 2, tappet 35 on it stretches into the end that braking clamp body inner chamber upside is crimped on lever 6, the other end of lever 6 is provided with semicircle piece 44, see also Fig. 4, this semicircle piece rolls and is connected the inner ring of needle bearing 16, and needle bearing 16 is installed on the semicircle bearing saddle bore of braking clamp body 2.Lever 6 is provided with R groove 47, and long wheel 42 is housed in it, and fixed support 43 is riveted on the lever and does not drop out with limit for length's roller, and long wheel 42 is not same center of rotation with semicircle piece 44.Pressure seat 17 in the double-push-disc brake clearance self-adjustment structure is provided with half slot 37, and long wheel 42 rolls with half slot 37 and contacts.Lever 6 one sides are two turning gears 45 that upwards being provided with in week of center of rotation is erietiform with semicircle piece 44, are provided with rotation slot 46 on the external circumferential of adjusting cover 25, and turning gear 45 just in time is installed in the rotation slot 46 of adjusting cover 25.Lever 6 has certain play along the erietiform turning gear 45 of needle bearing 16 rotating levers 6 one ends at the groove of the adjustment cover 25 of double-push-disc brake clearance self-adjustment structure 4, when guaranteeing that friction pair does not have wearing and tearing, braking process lever assembly 6 does not drive adjusts cover 25 rotations, when if friction pair has wearing and tearing, braking process lever assembly 6 will be stirred and adjust cover 25 rotations.
Be provided with the upper cover plate 9 that is tightly connected with braking clamp body in the upside of double-push-disc clearance self-regulating mechanism 4 pairing braking clamp bodies, it is built-in with sensor 40.Sensor 40 in the present embodiment is existing a kind of angle transducers, the sensing which is provided with is rotated the hole that end is a band internal tooth, be plugged in this hole with the coaxial nylon driving component 41 that is connected in driven shaft 29 upper ends on the double-push-disc clearance self-regulating mechanism 4, driven shaft 29 drives to internal tooth in the sensor 40 above-mentioned holes by nylon driving component 41, thereby drive driving mechanism motion in the sensor 40, see also Fig. 2 or Fig. 5.
The parallel downside that places braking clamp body 2 of the alternate certain distance of inside and outside brake lining (7,8), and be pressed against in the groove of brake holder one side by the stage clip 10 that is fixed on the pressing plate 11, it is limited between braking clamp body 2 and the brake holder 3, can not radial-play, see also Fig. 6.
Inner chamber at braking clamp body 2 is equipped with a double-push-disc clearance self-regulating mechanism, and this mechanism is connected on the lower cover plate that is tightly connected with braking clamp body, sees also Fig. 3.It comprises push-plate 21, screw rod 19, driving shaft 22, driven shaft 29, five tooth links 28, five gears 31, pressure seat 17, return spring 41, unilateral bearing 26, adjusts cover 25 and sprocket driving pair 18.Screw rod 19 is screwed in the symmetrical both sides of pressure seat 17, the lower end of screw rod 19 is provided with a screw boss 49, push-plate 21 centers are provided with a tapped blind hole 50, spin out the thread section of tapped blind hole 50 of screw boss 49, screw boss 49 has retrained moving axially of screw rod 19 relative push-plates 21 on it, and the polished rod part of its upside can freely be rotated in tapped blind hole.Screw rod 19 neither comes off with push-plate 21 like this, and screw rod 19 can rotate in push-plate 21 again flexibly.Push-plate 21 is pressed against the outside of inside brake liner 7, and screw rod 19 inboards are provided with five axial teeth groove, and this teeth groove is corresponding with the tooth of five tooth links 28 and five gears 31.Five tooth links 28 and five gears 31 are connected on driving shaft 22 and the driven shaft 29, and five teeth on it are pegged graft, are engaged in the inboard above-mentioned teeth groove of screw rod.Adjusting 28 of cover 25 and five tooth links is connected by unilateral bearing 26, adjust the outer ring interference fit of cover 25 and unilateral bearing 26, the inner ring of unilateral bearing 26 is enclosed within on the five tooth links 28, and five tooth links 28 can only rotate to counter clockwise direction, but irreversible.The lower end fixed cover of return spring 27 is on the boss of lower cover plate 34, and its upper end is sunk in the blind hole of pressure seat 17.
The upside of pressing plate 11 is plugged in the corresponding groove on the braking clamp body, and its downside is provided with concave arc, and a straight pin 12 embeds in these concave arcs, and its two ends are crimped on pressing plate 11 on the braking inlay 2 by cotter pin 13.This structure is convenient to the replacing of brake lining, only need pull down cotter pin 13, takes away straight pin 12, packing ring and pressing plate 11, just can change brake lining.
During braking, pressurized air feeds brake chamber 1, the effect of pressure is outwards constantly stretched out its tappet 35, thereby promoting lever 6 rotates in needle bearing, because long wheel 42 is eccentric in the center of rotation at lever semicircle shape position 44, make it the half slot on the double-push-disc brake clearance self-adjustment structure 4 is formed certain pressure, promote inside brake liner 7 by the double-push-disc on the double-push-disc brake clearance self-adjustment structure 4 21 and move, eliminate the gap between inside brake liner 7 and the brake disc 5 to brake disc 5.Brake disc 5 is fixed, lever assembly 6 is rotated further, and the reaction force on the braking clamp body 2 makes oppositely moving of unsteady braking clamp body 2 inside brake lining 7 motions, outer brake lining 8 is also pushed against on the brake disc 5, eliminate the gap of 5 of outer brake lining 8 and brake discs.Two braking liners form a pincerlike clamping force to the brake disc 5 that rotates, and wheel is produced a braking force, make automobile brake.In braking process, two push-plates act on the brake lining simultaneously, braking moment output steadily, and size and air pressure are linear, make braking more steady.
During the braking return, releasing of brake, pressurized air in the brake chamber 1 is emitted, return spring in the brake chamber 1 drives the tappet return, removed active force to lever assembly 6, lever assembly 6 guarantees to keep the necessary gap of normal rotation between two braking liners and the brake disc 5 because wobbler action has also been removed the active force of double-push-disc brake clearance self-adjustment structure 4, and double-push-disc brake clearance self-adjustment structure 4 returns to the braking front position under the effect of return spring 41.
When brake lining 7,8 and brake disc 5 nothing wearing and tearing, brake chamber 1 compressed air gives lever 6 with active force, cause lever 6 to promote pressure seat 17, pressure seat 17 drives whole double-push-disc brake clearance self-adjustment structure 4 and advances, promote inside brake liner 7 by push-plate 21 and press to brake disc 5, produce braking.In this process, the master and slave moving axis 22,29 in the regulating mechanism 4 drives screw rod 19 and rotates, and can not be driven because the angle of this rotation, is adjusted cover 25 less than the folded angle of rotation slot on the lever 16, and screw rod 19 breaks away from engagement relatively.
When brake lining 7,8 and brake disc 5 have wearing clearance, want brake lining and push down brake disc 5, special-purpose lever assembly 6 will more originally have bigger braking distance, two turning gears 45 on the lever 6 drive adjusts cover 25 rotations, adjust cover 25 and drive driving shaft 22 rotations by unilateral bearing 26, driving shaft 22 drives multiple thread screw 19 rotations by five tooth driving components 28 of coaxial connection, this rotation be transferred to driven shaft 29 by the sprocket driving pair of forming by drive sprocket 33, driven sprocket 30 and chain 32 18 and the screw rod 19 that is attached thereto on, make it to rotate together.Because 17 of pressure are fixed on braking clamp body 2 and can not rotate, the multiple thread screw 19 that spins thereon moves vertically with pressure seat 17 relative pressure seats 17, drives push-plate 21 and further presses to brake lining, guarantees that brake lining pushes down brake disc 5 to produce braking.During releasing of brake, special-purpose lever assembly 6 and double-push-disc brake clearance self-adjustment structure 4 returns, simultaneously special-purpose lever 6 drive adjusts cover 25 revolutions, because the effect of unilateral bearing 26, five toe joints connect part 28 and do not rotate, and cause master and slave moving axis 22,29 not rotate.Like this, because the wearing clearance of multiple thread screw 19 relative pressure seats 17 have moved the length compensation risen from vertically brake lining and brake disc 5 is realized automatic adjustment thus.In adjustment, regulating mechanism only rotates to a direction, and normal condition can not reverse, thereby guarantees that clearance self-regulating is more reliable.When brake pad wear during to the thickness limit that allows, sensor to driver's signal that gives the alarm, reminds the driver in time to change brake lining by circuit, has guaranteed traveling security.
The design feature of apparatus of the present invention makes it have littler structure in the situation of the identical braking moment of output Size, friction facing are heated rear along the diametric(al) expansion, and be littler to the impact of brake efficiency and brake clearance, Be easier to realize that the gap adjusts automatically. Simultaneously, radiating condition is good, does not have friction and helps gesture effect, friction facing temperature Degree raises little, and littler to the impact of coefficient of friction, brake efficiency is more stable, is not easy to take place heat fading, Service life is longer. In addition, littler to the brake efficiency impact after friction surface makes moist, soaks, and through one Can recover normal after twice braking.
Claims (5)
1. two caliper type air braking systems of regulating of the double-push-disc of brake clearance self-regulated, one braking clamp body and brake holder are arranged, both are slidingly connected by sliding pair, brake chamber places the upside of braking clamp body, tappet on it stretches into braking clamp body inner chamber upside and is crimped on lever one end that places the braking clamp body inner chamber, the other end of lever is provided with the semicircle piece, this semicircle piece is hinged by semicircle bearing and braking clamp body, inner chamber at braking clamp body is equipped with clearance self-regulating mechanism, described semicircle piece is provided with the long wheel with its different centers of rotation, this long wheel is crimped on the described clearance self-regulating mechanism, upside at the pairing braking clamp body of described clearance self-regulating mechanism is provided with the upper cover plate that is tightly connected with braking clamp body, it is built-in with sensor, pressing plate is connected on the braking clamp body, in, the parallel downside that places braking clamp body of the alternate certain distance of outer brake lining, and be pressed against on the brake holder by the stage clip on the stationary platen, it is characterized in that described clearance self-regulating mechanism is the double-push-disc clearance self-regulating mechanism, this mechanism is connected on the lower cover plate that is tightly connected with braking clamp body, it comprises push-plate, screw rod, driving shaft, driven shaft, five tooth links, five gears, pressure seat, return spring, unilateral bearing, adjust cover and sprocket driving pair, described screw rod is screwed in the symmetrical both sides of pressure seat, the screw rod lower end connects push-plate, push-plate is pressed against the outside of described inside brake liner, the screw rod inboard is provided with teeth groove, five tooth links and five gears are connected on the axle of driving shaft and driven shaft, and peg graft, be engaged in the described teeth groove of screw rod inboard, it is hinged by unilateral bearing and five tooth link one-way rotation to adjust cover, and the sprocket driving auxiliary driving connects driving shaft and driven shaft.
2. the two caliper type air braking systems of regulating of the double-push-disc of brake clearance self-regulated according to claim 1, it is characterized in that on described lever the center of circle with described semicircle shape structure be center of rotation week upwards be provided with two turning gears.
3. the two caliper type air braking systems of regulating of the double-push-disc of brake clearance self-regulated according to claim 2 is characterized in that being provided with rotation slot on the external circumferential of described adjustment cover, and described turning gear is engaged in this rotation slot.
4. the two caliper type air braking systems of regulating of the double-push-disc of brake clearance self-regulated according to claim 1 is characterized in that the sensing of described sensor on it rotate end by being connected with driven shaft is coaxial with the nylon driving component that is connected the driven shaft upper end.
5. the two caliper type air braking systems of regulating of the double-push-disc of brake clearance self-regulated according to claim 1, it is characterized in that described pressing plate upside is plugged in the corresponding groove on the braking clamp body, its downside is provided with concave arc, one straight pin embeds in this concave arc, and its two ends are crimped on pressing plate on the braking clamp body by cotter pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510022535XA CN100383428C (en) | 2005-12-22 | 2005-12-22 | Double thrust disc and double regulating caliper type pneumatic brake device capable of self-regulating braking clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510022535XA CN100383428C (en) | 2005-12-22 | 2005-12-22 | Double thrust disc and double regulating caliper type pneumatic brake device capable of self-regulating braking clearance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1789753A CN1789753A (en) | 2006-06-21 |
| CN100383428C true CN100383428C (en) | 2008-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510022535XA Expired - Fee Related CN100383428C (en) | 2005-12-22 | 2005-12-22 | Double thrust disc and double regulating caliper type pneumatic brake device capable of self-regulating braking clearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100383428C (en) |
Families Citing this family (6)
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| CN105276040A (en) * | 2014-05-29 | 2016-01-27 | 枣庄泰德机械有限公司 | Chain transmission type high-grade passenger car brake clearance driven adjustment mechanism and manufacturing method thereof |
| DE102017101028A1 (en) * | 2017-01-19 | 2018-07-19 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Brake caliper unit |
| CN107542817A (en) * | 2017-08-30 | 2018-01-05 | 隆中控股集团有限公司 | A kind of electric brake |
| EP3564550A1 (en) * | 2018-04-30 | 2019-11-06 | Meritor Heavy Vehicle Braking Systems (UK) Limited | A disc brake assembly |
| JP7444756B2 (en) * | 2020-10-28 | 2024-03-06 | ナブテスコ株式会社 | brake caliper device |
| CN113565898A (en) * | 2021-07-29 | 2021-10-29 | 山东力得汽车科技股份有限公司 | Lightweight air pressure disc brake |
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| CN1789753A (en) | 2006-06-21 |
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