CN104196929B - Worm and inclined-worm-gear-disc type electronic parking brake - Google Patents
Worm and inclined-worm-gear-disc type electronic parking brake Download PDFInfo
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- CN104196929B CN104196929B CN201410417881.7A CN201410417881A CN104196929B CN 104196929 B CN104196929 B CN 104196929B CN 201410417881 A CN201410417881 A CN 201410417881A CN 104196929 B CN104196929 B CN 104196929B
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Abstract
The invention discloses a worm and inclined-worm-gear-disc type electronic parking brake which comprises an actuating device and a brake caliper assembly. The actuating device comprises a shell fixed to a brake caliper of the brake caliper assembly, and a worm and inclined-worm-gear transmission mechanism is installed in the shell. The symmetrical center line of a worm gear of an inclined worm gear disc is deflected by a certain angle relative to the axis of a worm gear shaft, and the outer end of the worm gear shaft is inserted into the brake caliper. A driving motor is installed on one side of the shell and connected with one end of a worm, an adjustment screw is fixed in a screw hole in the outer side of the shell through a locking nut, the inner end of the adjustment screw abuts against the upper portion of the inner end face of the inclined worm gear disc, and the adjustment screw is used for transmitting reactive force of the transmission mechanism. The worm and inclined-worm-gear-disc type electronic parking brake has the advantages that physical output of a driver can be reduced, a vehicle parking brake system can be simplified, the gap self-regulation function, the speed-reduction and torque-increasing functions, the movement conversion function and the mechanical reverse self-locking function can be achieved, and electric power consumed during long-time parking can be reduced; in addition, the transformation machining cost is low, and the manufacturing-process succession performance and the technological-process succession performance are good.
Description
Technical field
The present invention relates to the actuator in a kind of park braking system for automobile, more precisely, particularly to a kind of snail
Bar oblique worm gear disc type electric parking brake.
Background technology
Conventional truck parking braking system is mainly implemented by the form of parking brake handle grip control machinery drag-line at present
Parking braking is although structure is simple, low cost, but there are many shortcomings, for example, consume driver's muscle power, uphill starting is grasped
Make loaded down with trivial details it is difficult to realize clearance self-regulating, safety is relatively low.With the development of automotive electronic technology, occur in field of automobile control
X-by-wire on Automobile, and then occur in that Automotive By-Wire Control Technology.Electronic brake system epb (electric park
Brake) be Automotive By-Wire Control Technology a class.
Electronic brake system epb is mainly made up of with electronic control unit electric parking brake.Wherein electronics is stayed
Car brake is converted into the translation of brake block the stability of rotation of motor, and increasing of simultaneously can slowing down is turned round and automatically compensated due to length
The brake clearance that phase works and produces, and small volume, compact conformation, are very heavy in whole electronic brake system epb
The ingredient wanted.
Existing electric parking brake generally comprises direct current generator, drive mechanism (is typically turned by reducing gear and motion
Converting mechanism forms), the part such as caliper and brake disc.The solution of reducing gear is more at present, abroad has U.S. sky to close public
The planetary gear reducing mechanism of department, the domestic few teeth difference compound planet gear mechanism having Zhejiang Asia-Pacific electromechanics company limited.Motion
The current species of shifter is less, generally ball-screw, bolt and nut mechanism.
Content of the invention
It is an object of the invention to provide a kind of oblique worm gear disc type electric parking brake of worm screw, between this brake is capable of
Gap self-regulated, increasing torsion of slowing down, motion translation function and the reverse auto-lock function of machinery, further goal of the invention is to reduce driver's body
Power consumes, and simplifies park braking system for automobile, can reduce power consumption during long-time parking, and it is low to transform processing cost,
Manufacture process and technological process inheritance are good.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of oblique worm gear disc type electric parking brake of worm screw, including actuating device and brake caliper assy, described actuates dress
Put including:
Housing, is fixed on the braking clamp body of brake caliper assy away from brake block one end；
Drive mechanism, is arranged in housing and is used for promoting brake caliper assy action；
Worm screw, is arranged on housing by the bearing block at its two ends, and worm screw main body is located in housing；
Tiltedly worm gear, is made up of worm-wheel shaft and oblique worm gear disk, and oblique worm gear disk is located in housing and bottom and worm engaging, oblique snail
The worm wheel symmetrical centrage of wheel disc deflects certain angle α with respect to the axis of worm-wheel shaft, for real under the support of adjusting screw
The now axial movement of oblique worm gear；Worm-wheel shaft outer end is inserted in the braking clamp body of brake caliper assy, for transmitting powered system
It is located at the brake block action on the right side of brake disc in dynamic pincers assembly；
Motor, is arranged on housing side by a motor cover for seat, and is connected with worm screw one end, for driving transmission
Mechanism action；
Described adjusting screw is screwed in hull outside one screw and is fixed by lock-nut, and adjusting screw the inner leans institute
State the inner face top of oblique worm gear disk, for transmitting the counteracting force of drive mechanism, thus brake caliper assy is promoted by housing
Braking clamp body and be located at brake disc on the left of brake block move.
As further preferred, between the worm wheel symmetrical centrage of described oblique worm gear disk and worm-wheel shaft axis deflection angle
α is 5-10 degree.
As further preferred, described motor is DC servo motor and is fixed on motor by a setting-up piece
In cover for seat, driving motor output shaft insertion worm screw one end is simultaneously passed through bonded.
As further preferred, on the housing two positioning sleeves, described housing are symmetrically installed with by interference fit
Positioned by positioning sleeve with described braking clamp body and affixed by running through the attachment bolt of positioning sleeve.
As further preferred, described brake caliper assy includes braking clamp body, brake-caliper support, two brake block, pistons
And clearance self-regulating mechanism, described braking clamp body is symmetrically fixed with two guide fingers by fastening bolt, and passes through guide finger and system
The support grafting of dynamic pincers；Described two brake block are stuck on brake-caliper support by retaining spring respectively and are located at brake disc both sides；
Described piston and clearance self-regulating mechanism are located in the cavity portion of braking clamp body, and the braking of homonymy is close in described piston outer face
Block, piston is connected with the cavity portion inner end of braking clamp body by clearance self-regulating mechanism, the insertion braking of described worm-wheel shaft outer end
The cavity portion of caliper is interior and passes sequentially through clearance self-regulating mechanism and piston promotion brake block realization braking.
As further preferred, it is provided with one in the cavity portion inwall of described braking clamp body and work is enclosed within by interference fit
Piston packing on wall beyond the Great Wall, resets with after auxiliary piston braking.
As further preferred, described clearance self-regulating mechanism includes the self-regulated nut assembly being threaded connection and self-regulated spiral shell
Bar assembly.
As further preferred, described self-regulated nut assembly includes self-regulated nut, is set with thrust on self-regulated nut successively
Ball bearing, two structure identical flower-shape pieces, waveform elastic piece and self-regulated nut back-up ring, described self-regulated nut assembly passes through self-regulated
Nut back-up ring is stuck in piston.
As further preferred, described self-regulated screw arbor assembly includes self-regulated screw rod, and self-regulated screw rod one end screws in self-regulated nut
Interior, it is respectively installed with compression spring, spring shield and copper backing in the self-regulated screw rod other end, described spring shield is enclosed within compression spring
Outside is simultaneously stuck in the cavity portion inner end of described braking clamp body by circlip, and described worm-wheel shaft outer end is inserted into described system
In the cavity portion of moving caliper and self-regulated screw rod is leaned by copper backing.
As further preferred, it is sequentially provided with the cavity portion external port of described braking clamp body and is enclosed within worm-wheel shaft
O type sealing ring, spacer and bellows, described bellows outer end protrudes from the cavity portion external port of braking clamp body simultaneously
Contact with oblique worm gear side surface.
The invention has the beneficial effects as follows:
1st, the oblique worm gear disc type electric parking brake of worm screw of the present invention makes parking brake handle grip be substituted, relatively
Further simplified in conventional truck parking braking system control device, save cab space, reduce driver
Physical demandss during parking.
2nd, because using worm screw oblique worm gear engagement transmission mechanism, therefore compact conformation, gear ratio is big, and can be simultaneously real
Now slow down to increase and turn round function and motion translation function, the rotation of worm gear will be converted to the translation of worm-wheel shaft, stable drive is reliable.
3rd, due to the reverse self-locking of machinery using worm screw oblique worm gear engagement transmission mechanism, therefore can be realized, therefore can reduce
Power consumption during long-time parking.
4th, because the present invention is Curve guide impeller on the basis of original disk brake assembly with parking and braking mechanism,
Therefore there is clearance self-regulating function, and it is low to transform processing cost, manufacture process and technological process inheritance are good.
Brief description
Fig. 1 is the structure sectional view of the present invention.
Fig. 2 is the a-a partial sectional view of Fig. 1.
Fig. 3 is the breakdown axonometric projection graph actuating device and brake caliper assy position relationship of the present invention.
Fig. 4 is the breakdown axonometric projection graph actuating apparatus structure composition of the present invention.
Fig. 5 is the breakdown axonometric projection graph of the oblique Worm wheel transmission mechanism of worm screw of the present invention.
Fig. 6 is the breakdown axonometric projection graph of the brake caliper assy of the present invention.
In figure: braking clamp body 1, caliper part 101, cavity portion 102, brake block 2, brake disc 3, piston dust cover 4, live
Plug 5, piston packing 6, self-regulated nut 7, thrust ball bearing 8, flower-shape piece 9, waveform elastic piece 10, self-regulated nut back-up ring 11, from
Adjust screw rod 12, big disk 1201, spring shield 13, notch 1301, compression spring 14, copper backing 15, o type sealing ring 16, rubber is prevented
Dust hood 17, oblique worm gear 18, oblique worm gear disk 1801, worm-wheel shaft 1802, housing 19, lock-nut 20, adjusting screw 21, spacer 22,
Worm screw 23, circlip 24, bearing block 25, bearing sealed ring 26, bearing 27, motor cover for seat 28, motor 29, anti-vibration sleeve
30, setting-up piece 31, brake caliper assy 32, actuate device 33, positioning sleeve 34, attachment bolt 35, guide finger 36, brake-caliper support
37, screw 38, bolt 39, retaining spring 40, fastening bolt 41.
Specific embodiment
As Figure 1-Figure 5, a kind of worm screw oblique worm gear disc type electric parking brake involved in the present invention, including actuating
Device 33 and brake caliper assy 32.The described device 33 that actuates includes a housing 19, is provided with for promoting system in housing 19
The drive mechanism of dynamic pincers assembly 32 action, is provided with motor 29 in housing 19 side, is provided with adjusting screw 21 on housing 19.
Described housing 19 is to be made up of with the Special-shaped flange being located at the uncovered side of casing a uncovered hollow box body of one side
Integrative-structure, housing 19 is fixed on away from brake block 2 one end on the braking clamp body 1 of brake caliper assy 32, in described housing 19
Special-shaped flange on two positioning sleeves 34 are symmetrically installed with by interference fit, described housing 19 is passed through with described braking clamp body 1
Positioning sleeve 34 positions and affixed by running through the attachment bolt 35 of positioning sleeve 34.Described drive mechanism includes a worm screw 23 and tiltedly
Worm gear 18, bearing block 25 is passed through at described worm screw 23 two ends respectively and bearing 27 is installed through bottom in housing 19, and worm screw 23 is main
Body is located in housing 19, and bearing block 25 inserts and pass through the front and rear sides that bolt 39 is fixed on housing 19 respectively, in 23 liang of worm screw
It is respectively installed with bearing sealed ring 26 outside the bearing 27 that end is located in bearing block 25.Described oblique worm gear 18 is by being connected as a single entity
Worm-wheel shaft 1802 and oblique worm gear disk 1801 are constituted, and oblique worm gear disk 1801 is located in housing 19 and bottom is engaged with worm screw 23, oblique snail
The worm wheel symmetrical centrage of wheel disc 1801 deflects certain angle α with respect to the axis of worm-wheel shaft 1802, preferably, described oblique snail
Deflection angle α between the worm wheel symmetrical centrage of wheel disc 1801 and worm-wheel shaft 1802 axis is 5-10 degree.In oblique worm gear disk
1801 outer ends are provided with the cylindrical boss of an one, and the outer face of cylindrical boss is vertical plane.Tiltedly worm gear disk 1801
With the profile of tooth of worm screw 23 all using evolvent type structure, and the normal module of oblique worm gear disk 1801 and worm screw 23 and normal pressure
Angle is equal, and the lead angle of worm screw 23 is equal with the helical angle of oblique worm gear disk 1801, the rotation direction of worm screw 23 and oblique worm gear disk 1801
Rotation direction is identical, and the transverse module of worm screw 23 is equal with the transverse module of oblique worm gear disk 1801.Additionally due to oblique worm gear disk 1801
There is differential seat angle with the rotation axiss of its worm-wheel shaft 1802 in worm wheel symmetrical centrage, therefore worm screw 23 centrage is not in oblique worm gear disk
1801 along along the middle separated time in facewidth direction.
Described motor 29 passes through a motor cover for seat 28 and is bolted on the bearing block 25 of housing 19 side, and
Coaxially connected with worm screw 23 one end, described motor 29 is DC servo motor and passes through a setting-up piece 31 and screw 38
It is fixed in motor cover for seat 28, motor 29 output shaft insertion worm screw 23 one end center in the hole is simultaneously passed through bonded, for driving
Dynamic drive mechanism action.It is provided with anti-vibration sleeve 30 between motor cover for seat 28 the inner and motor 29, to protect motor.
Described adjusting screw 21 screws in housing 19 outer upper one screw and fixing by lock-nut 20, in housing 19
It is provided with a counter sink, adjusting screw 21 is located at countersunk head in the hole and inner spherical for semicircle, its rotation at the corresponding described screw in outside
Enter in housing 19 and lean the inner face top of described oblique worm gear disk 1801, by lock-nut 20 scalable adjusting screw 21
Axially mounted position, for transmitting the counteracting force of drive mechanism, thus promote the braking of brake caliper assy 32 by housing 19
Caliper 1 and the brake block 2 being located on the left of brake disc 3 are mobile.
As shown in Fig. 1, Fig. 3 and Fig. 6, described brake caliper assy 32 is the commonly used floating caliper disc system of existing car
Dynamic device, it can double as parking brake actuator while as service brake actuator.Described brake caliper assy 32 wraps
Include braking clamp body 1,37, two brake block 2 of brake-caliper support, piston 5 and clearance self-regulating mechanism.Wherein brake-caliper support 37 passes through
Bolt pass through its lower end both sides two bolts hole be fixed on the knuckle of wheel steering system, described braking clamp body 1 be by
One caliper part 101 and the integral structure of cavity portion 102 composition, 101 liang of the caliper part of braking clamp body 1 upper end
Side is symmetrically fixed with two guide fingers 36 by fastening bolt 41, and inserts brake-caliper support 37 upper end respectively by guide finger 36
In two corresponding jacks and for being slidably matched, so that braking clamp body 1 can be slid axially along guide finger 36.Described two brake block
2 are stuck on brake-caliper support 37 by retaining spring 40 respectively and are located at brake disc 3 both sides, so that brake block 2 can be moved axially
But can not play up and down, in the caliper part 101 of described braking clamp body 1, corresponding brake block 2 one end is provided with the trapezoidal of one
Boss is simultaneously attached to outside the brake block 2 in brake disc 3 left side by trapezoid boss.Described piston 5 and clearance self-regulating mechanism set
In the cavity portion 102 of braking clamp body 1, the brake block 2 of homonymy is close in described piston 5 outer face, and piston 5 passes through clearance self-regulating
Mechanism is connected with cavity portion 102 inner end of braking clamp body 1, and the cavity of braking clamp body 1 is inserted in described worm-wheel shaft 1802 outer end
Part 102 is interior and passes sequentially through clearance self-regulating mechanism and piston 5 promotion brake block 2 realization braking.
As shown in figure 1, cavity portion 102 inwall in described braking clamp body 1 is provided with two annulars at its inner port
Groove, is respectively provided with piston packing 6 and piston dust cover 4 in described two annular grooves, and described piston packing 6 passes through
Interference fit is enclosed within piston 5 outer wall, to help reset after piston 5 braking.Described piston dust cover 4 make for elastomeric material and
Positioned at piston packing 6 outside and be stuck in piston 5 outer end.
As shown in figures 1 to 6, described clearance self-regulating mechanism includes the self-regulated nut assembly being threaded connection and self-regulated spiral shell
Bar assembly.Described self-regulated nut assembly includes a self-regulated nut 7, and self-regulated nut 7 outer wall is stepped cylinder body and is located at
The annular boss in portion with diameter greater than the cylindrical section external diameter of its both sides, on the annular boss shaft shoulder of self-regulated nut 7 along the circumferential direction
It is evenly equipped with six through holes, in order to brake fluid flowing during service brake.The annular boss being located therein on self-regulated nut 7
Outside is set with 8, two structure identical flower-shape pieces 9 of thrust ball bearing, waveform elastic piece 10 and self-regulated nut back-up ring 11, institute successively
State waveform elastic piece 10 to be clipped between two flower-shape pieces 9, described self-regulated nut assembly is stuck in piston 5 by self-regulated nut back-up ring 11
Ladder in the hole, the annular boss of self-regulated nut 7 and piston 5 endoporus ladder card along between be machined with the circular cone cooperating
Face, to guarantee for the axially-movable of self-regulated nut 7 to pass to piston 5.
Described flower-shape piece 9 is an annular flake along the circumferential direction uniformly processing six grooves, thus can play
The power that the self-regulated nut back-up ring 11 being stuck in piston 5 inside groove is subject to passes to waveform elastic piece 10 and self-regulated nut 7, and does not hinder
The flowing of hydraulic oil during service brake.Described waveform elastic piece 10 is an annular flake and stamps out a circle circular arc projection, energy
Enough produce axial deformation.
Described self-regulated screw arbor assembly includes self-regulated screw rod 12, and self-regulated screw rod 12 one end is machined with external screw thread and screws in self-regulated spiral shell
In female 7, it is respectively installed with compression spring 14, spring shield 13 and copper backing 15, described spring shield 13 in self-regulated screw rod 12 other end
For cup tubular the outside that is enclosed within compression spring 14, cup edge one end of spring shield 13 is stuck in described caliper by circlip 24
Cavity portion 102 inner end of body 1, is provided with the big disk 1201 of one, described great circle in the other end of described self-regulated screw rod 12
Disk 1201 insertion spring shield 13 is interior and snaps in the cup edge one being symmetrically arranged at spring shield 13 by the boss being symmetrically arranged in its outer rim
In notch 1301 on the barrel of end, the length of described notch 1301 is more than the thickness of described boss, and described compression spring 14 is stuck in
Between the cup bottom of spring shield 13 and described big disk 1201.Described copper backing 15 is enclosed within the center of described self-regulated screw rod 12 other end
On spindle nose, described worm-wheel shaft 1802 outer end is passed by housing 19 in the cavity portion 102 be inserted into described braking clamp body 1 and passes through
Copper backing 15 leans self-regulated screw rod 12, for transmitting the brake block 2 being located at brake disc 3 right side in powered brake caliper assy 32
Action.
As shown in figure 1, being sequentially provided with for being enclosed within worm-wheel shaft in cavity portion 102 external port of described braking clamp body 1
O type sealing ring 16 on 1802, spacer 22 and bellows 17, described bellows 17 outer end protrudes from braking clamp body 1
Cavity portion 102 external port and the cylindrical boss end contact with oblique worm gear disk 1801, described worm-wheel shaft 1802 outer end according to
Secondary act against on copper backing 15 through after bellows 17, spacer 22 and o type sealing ring 16.
During non-parking braking, the tooth mesh regional of worm screw 23 and oblique worm gear disk 1801 is in worm screw 23 centrage right-hand member.Parking
During braking, motor 29 drives worm screw 23 to rotate, and worm screw 23 is by passing to torque tiltedly with oblique engaging of worm gear disk 1801
Worm gear disk 1801, due to the inclination of oblique worm gear disk 1801 symmetrical center line, therefore oblique worm gear disk 1801 is around its worm-wheel shaft 1802
While axis rotation, under the contact of adjusting screw 21 is spacing, oblique worm gear disk 1801 will move axially to the left.Tiltedly worm gear disk
1801 and the mesh regional of worm screw 23 be also moved to the left along worm-wheel shaft 1802 line direction, and remain engaged transmission.And then tiltedly
Worm gear disk 1801 promotes copper backing 15, self-regulated screw rod 12, self-regulated nut 7 and piston 5 to be moved to the left by worm-wheel shaft 1802 successively,
The final brake block 2 promoting brake disc 3 right side moves to left near brake disc 3；Simultaneously as in the worm wheel symmetrical of oblique worm gear disk 1801
Heart line deflects certain angle with respect to the axis of worm-wheel shaft 1802, therefore rotates in oblique worm gear disk 1801 and passes through adjusting screw simultaneously
21 promotion braking clamp bodies 1 move right, and are driven on the left of brake disc 3 by the trapezoid boss in described caliper part 101
Brake block 2 move to right near brake disc 3, thus producing brake force.
When releasing braking, motor 29 reversion drives worm screw 23 to rotate backward, in the same manner oblique worm gear disk 1801 and worm screw 23
Mesh regional moves right, and the worm-wheel shaft 1802 of oblique worm gear 18 no longer promotes clearance self-regulating mechanism, and then in compression spring 14
Make clearance self-regulating mechanism move to right reset under effect, in self-regulated nut 7 return, buffering can be played by waveform elastic piece 10 and subtract
Bestir oneself use, thus reducing noise；The deformation in braking of piston packing 6 on piston 5, now just restores to the original state, makes work
Fill in 5 returns, brake caliper assy 32 releases braking, and the brake block 2 positioned at brake disc 3 both sides is respectively in the presence of retaining spring 40
Reset.Because general Disk Brake gap is about 0.2mm, so the worm wheel symmetrical centrage in oblique worm gear disk 1801
Just can ensure that when oblique worm gear disk 1801 rotates less than 120 degree within differing 10 degree with the axis of its worm-wheel shaft 1802, tiltedly
The axial displacement of worm gear disk 1801 just can meet brake request.
If brake block 2 abrasion produces a small amount of excessive gaps during using, during braking, piston 5 is by opposing pistons sealing ring
6 sliding to the left one segment distance, because self-regulated nut assembly and piston 5 pass through to be connected and can not separate, so now certainly
Adjust nut 7 can rotate against reach identical distance with self-regulated screw rod 12 by screw thread in the presence of thrust ball bearing 8, thus
Realize the adjust automatically of brake clearance.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in description and embodiment
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Realize other modification, therefore under the general concept being limited without departing substantially from claim and equivalency range, the present invention does not limit
In specific details with shown here as the legend with description.
Claims (10)
1. a kind of oblique worm gear disc type electric parking brake of worm screw, including actuating device and brake caliper assy, is characterized in that: described
Actuate device to include:
Housing, is fixed on the braking clamp body of brake caliper assy away from brake block one end；
Drive mechanism, is arranged in housing and is used for promoting brake caliper assy action；
Worm screw, is arranged on housing by the bearing block at its two ends, and worm screw main body is located in housing；
Tiltedly worm gear, is made up of worm-wheel shaft and oblique worm gear disk, and oblique worm gear disk is located in housing and bottom and worm engaging, oblique worm gear disk
Worm wheel symmetrical centrage deflect certain angle α with respect to the axis of worm-wheel shaft, for realizing tiltedly under the support of adjusting screw
The axial movement of worm gear；Worm-wheel shaft outer end is inserted in the braking clamp body of brake caliper assy, for transmitting powered caliper
It is located at the brake block action on the right side of brake disc in assembly；
Motor, is arranged on housing side by a motor cover for seat, and is connected with worm screw one end, for drive transmission device
Action；
Described adjusting screw is screwed in hull outside one screw and is fixed by lock-nut, and adjusting screw the inner leans described oblique
The inner face top of worm gear disk, for transmitting the counteracting force of drive mechanism, thus promote the system of brake caliper assy by housing
Moving caliper and the brake block being located on the left of brake disc move.
2. the oblique worm gear disc type electric parking brake of worm screw according to claim 1, is characterized in that: described oblique worm gear disk
Deflection angle α between worm wheel symmetrical centrage and worm-wheel shaft axis is 5-10 degree.
3. the oblique worm gear disc type electric parking brake of worm screw according to claim 1 and 2, is characterized in that: described drives electricity
Machine is DC servo motor and is fixed in motor cover for seat by a setting-up piece, driving motor output shaft inserts worm screw one end
And by bonded.
4. the oblique worm gear disc type electric parking brake of worm screw according to claim 1, is characterized in that: lead on the housing
Cross interference fit and be symmetrically installed with two positioning sleeves, described housing is positioned by positioning sleeve with described braking clamp body and passes through to run through
The attachment bolt of positioning sleeve is affixed.
5. the oblique worm gear of the worm screw according to claim 1 or 4 disc type electric parking brake, is characterized in that: described caliper
Assembly includes described braking clamp body, brake-caliper support, two brake block, piston and clearance self-regulating mechanism, and described braking clamp body leads to
Cross fastening bolt and be symmetrically fixed with two guide fingers, and by guide finger and brake-caliper support grafting；Described two brake block divide
It is not stuck on brake-caliper support by retaining spring and be located at brake disc both sides；Described piston and clearance self-regulating mechanism are located at braking
In the cavity portion of caliper, the brake block of homonymy is close in described piston outer face, and piston passes through clearance self-regulating mechanism and caliper
The cavity portion inner end of body connects, and described worm-wheel shaft outer end is inserted in the cavity portion of braking clamp body and passed sequentially through gap certainly
Regulating mechanism and piston promote brake block to realize braking.
6. the oblique worm gear disc type electric parking brake of worm screw according to claim 5, is characterized in that: in described braking clamp body
Cavity portion inwall be provided with a piston packing being enclosed within piston outer wall by interference fit, with auxiliary piston braking after
Reset.
7. the oblique worm gear disc type electric parking brake of worm screw according to claim 6, is characterized in that: described clearance self-regulating machine
Structure includes the self-regulated nut assembly being threaded connection and self-regulated screw arbor assembly.
8. the oblique worm gear disc type electric parking brake of worm screw according to claim 7, is characterized in that: described self-regulated nut group
Part includes self-regulated nut, is set with thrust ball bearing, two structure identical flower-shape pieces, waveform elastic pieces on self-regulated nut successively
With self-regulated nut back-up ring, described self-regulated nut assembly is stuck in piston by self-regulated nut back-up ring.
9. the oblique worm gear of the worm screw according to claim 7 or 8 disc type electric parking brake, is characterized in that: described self-regulated spiral shell
Bar assembly includes self-regulated screw rod, and self-regulated screw rod one end screws in self-regulated nut, is respectively installed with pressure in the self-regulated screw rod other end
Spring, spring shield and copper backing, described spring shield is enclosed within the outside of compression spring and is stuck in described caliper by circlip
The cavity portion inner end of body, described worm-wheel shaft outer end is inserted in the cavity portion of described braking clamp body and passes through copper backing top
By self-regulated screw rod.
10. the oblique worm gear of the worm screw according to claim 1 or 6 disc type electric parking brake, is characterized in that: in described braking
It is sequentially provided with o type sealing ring, spacer and the bellows being enclosed within worm-wheel shaft, described rubber in the cavity portion external port of caliper
Glue dust cover outer end is protruded from the cavity portion external port of braking clamp body and is contacted with oblique worm gear side surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417881.7A CN104196929B (en) | 2014-08-20 | 2014-08-20 | Worm and inclined-worm-gear-disc type electronic parking brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417881.7A CN104196929B (en) | 2014-08-20 | 2014-08-20 | Worm and inclined-worm-gear-disc type electronic parking brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196929A CN104196929A (en) | 2014-12-10 |
| CN104196929B true CN104196929B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410417881.7A Active CN104196929B (en) | 2014-08-20 | 2014-08-20 | Worm and inclined-worm-gear-disc type electronic parking brake |
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| CN (1) | CN104196929B (en) |
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| US4040307A (en) * | 1975-05-15 | 1977-08-09 | U.S. Philips Corporation | Worm gear transmission |
| US6213256B1 (en) * | 1996-12-05 | 2001-04-10 | Robert Bosch Gmbh | Electromechanical wheel brake system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104196929A (en) | 2014-12-10 |
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