CN104196922A - Worm gear, worm, ball and wedge-disc type electronic parking brake - Google Patents
Worm gear, worm, ball and wedge-disc type electronic parking brake Download PDFInfo
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- CN104196922A CN104196922A CN201410417523.6A CN201410417523A CN104196922A CN 104196922 A CN104196922 A CN 104196922A CN 201410417523 A CN201410417523 A CN 201410417523A CN 104196922 A CN104196922 A CN 104196922A
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Abstract
The invention discloses a worm gear, worm, ball and wedge-disc type electronic parking brake which comprises an actuating device and a brake caliper assembly. The brake caliper assembly comprises a push rod assembly and a piston assembly which are arranged in a cavity of a brake caliper. The push rod assembly comprises a wedge disc, balls, a push rod shaft, a self-regulation screw, a pressure spring and a spring limiting sleeve. The push rod shaft extends out of the cavity and is connected with a transmission mechanism of the actuating device. The multiple balls are evenly distributed between the push rod shaft and the wedge disc in a clamped mode and used for generating axial push force. The self-regulation screw is connected with the self-regulation screw of the piston assembly in a threaded mode. The actuating device comprises a shell, the transmission mechanism and a driving motor. The worm gear, worm, ball and wedge-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 conveniently 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, or rather, the present invention be more particularly directed to a kind of Worm gear ball wedge disc type electric parking brake.
Background technique
Conventional truck parking braking system is mainly implemented parking braking by the form of parking brake handle grip control machinery drag-line at present, although simple in structure, cost is low, but exist many shortcomings, for example consume driver's muscle power, uphill starting complex operation, be difficult to realize clearance self-regulating, Security is lower.Along with the development of automotive electronic technology, there is X-by-wire on Automobile in field of automobile control, and then occurred Automotive By-Wire Control Technology.Electronic brake system EPB (Electric Park Brake) is a class of Automotive By-Wire Control Technology.
Electronic brake system EPB is mainly made up of electric parking brake and electronic control unit.Wherein electric parking brake the stability of rotation of motor be converted into the translation of brake slipper, the brake clearance that increasing is turned round, auto-compensation produces due to long-term work can slow down simultaneously, and volume is little, compact structure, it is very important constituent element in whole electronic brake system EPB.
Existing electric parking brake generally comprises the parts such as direct current generator, reducing gear, movement conversion mechanism, braking brake pad and brake disc.The solution of movement conversion mechanism is less at present, mainly contains ball screw, bolt and nut mechanism etc.
Summary of the invention
The object of this invention is to provide a kind of Worm gear ball wedge disc type electric parking brake, this break is convenient to realize clearance self-regulating, slow down increase turn round, motion conversion function and mechanical reverse auto-lock function, further goal of the invention is to reduce driver's physical output, simplify park braking system for automobile, power consumption can reduce long-time parking time, and transformation processing cost is low, and manufacture process and technological process inheritance are good.
For achieving the above object, the present invention adopts following technological scheme:
A kind of Worm gear ball wedge disc type electric parking brake, comprises actuation gear and brake caliper assy, and described brake caliper assy comprises push-rod assembly and the piston assembly in the cavity that is located at braking clamp body;
Described push-rod assembly comprises the wedge dish, ball, push rod shaft, self-regulated screw rod, pressure spring and the spring stop collar that are located at successively in described cavity;
Described spring stop collar is enclosed within the outside of described pressure spring, self-regulated screw rod, push rod shaft and wedge dish and is stuck in described cavity endoporus bottom by interior jump ring, for realizing the spacing of push-rod assembly;
Described push rod shaft is that multidiameter shaft shape and miner diameter end are passed by described cavity and be connected with the driving mechanism of actuation gear, for transmitting torque; Described ball is multiple and to be uniformly clamped between push rod shaft and wedge dish, produces end thrust when making push rod shaft rotation brake; The miner diameter end of described self-regulated screw rod is passed and is connected with the self-regulated nut thread of described piston assembly by spring stop collar bottom, for transferring axial thrust and realize clearance self-regulating;
Described actuation gear comprises:
Housing, is fixed on described braking clamp body away from brake slipper one end;
Driving mechanism, it is Worm and worm-wheel gearing and is arranged in housing, drives described push rod shaft rotation for transmitting torque;
Drive motor, is arranged on housing one side by a motor cover for seat, and is connected with worm screw one end of driving mechanism, moves for drive transmission device.
As further preferred, described self-regulated screw rod is multidiameter shaft shape, and its one end, large footpath, near described push rod shaft, is set with copper backing on the spindle nose of one end, large footpath of self-regulated screw rod, copper backing is clamped between self-regulated screw rod and push rod shaft, to reduce the spin friction resistance of self-regulated screw rod to push rod shaft.
As further preferred, described wedge dish is annular slice and the endoporus that is fixed on described cavity bottom, on its corresponding ball one side end face, be along the circumferential direction evenly equipped with multiple scalloped recess, and the degree of depth of scalloped recess while braking along push rod shaft relative sense of rotation shoal gradually; Uniform hemispherical dimples along the circumferential direction on the shaft shoulder of the corresponding wedge dish of push rod shaft one side, pit and described scalloped recess are corresponding and equate with ball quantity one by one, and described ball lays respectively between corresponding pit and scalloped recess, for generation of end thrust.
As further preferred, described spring stop collar is the cup-shaped that bottom is provided with through hole, its endoporus and outer wall are stepped, be arranged with along its axial arranged rectangle gap at spring stop collar middle part, on the outer wall of one end, large footpath of self-regulated screw rod, be arranged with the rectangular boss snapping in respectively in rectangle gap, with the circular-rotation of restriction self-regulated screw rod, thereby guarantee to realize clearance self-regulating.
As further preferred, described driving mechanism comprises intermeshing worm gear and worm screw, described worm gear is to be made up of worm-wheel shaft and worm gear dish, and its worm-wheel shaft one end is arranged on described housing the inner by bearing, and the other end is arranged on corresponding housing one end on braking clamp body by bearing; Described worm gear dish is fan-shaped, and central angle corresponding to its worm-gear tooth part is 90 degree.
As further preferably, described push rod shaft and described worm-wheel shaft are coaxially pegged graft by spline, push rod shaft can be realized guaranteeing transmitting torque when and move axially.
As further preferably, described drive motor is DC servo motor and is fixed in motor cover for seat by a supporting disk, and worm screw one end that drive motor output shaft inserts driving mechanism also connects by key.
As further preferred, described housing and braking clamp body are affixed by multiple connecting bolts, on the opposing end surface between housing and braking clamp body, be respectively equipped with the circular orientation boss and the positioning groove that cooperatively interact, to guarantee the connection coaxiality of housing and braking clamp body.
As further preferred, braking rotation extreme position at the corresponding driving mechanism worm gear of described inner walls one side dish is provided with a position limit pin, to guarantee in the time that drive motor parking moment reaches maximum value, limit the maximum angle of swing of worm gear, avoid occurring causing the phenomenon of transmission failure to occur when brake slipper excessive abrasion rear worm wheel worm screw departs from engagement.
As further preferred, described piston assembly comprises the piston being slidably matched with cavity, described inside brake piece is close in piston exterior edge face, between piston and described cavity, be provided with dust-proof cover and piston packing, in the shoulder hole of piston, be fitted with self-regulated nut, on self-regulated nut, be set with successively thrust ball bearing, two colored shape sheets that structure is identical, waveform elastic sheet and self-regulated nut back-up ring, described self-regulated nut, thrust ball bearing, flower shape sheet and waveform elastic sheet are stuck in piston by self-regulated nut back-up ring, to eliminate brake noise, avoid colliding between self-regulated nut and piston.
As further preferred, described braking clamp body is symmetrically fixed with two guide fingers by clamping bolt, and pegs graft by guide finger and brake-caliper support; Described two brake slipper are stuck on brake-caliper support by stopper spring respectively and are positioned at brake disc both sides.
As further preferably, in passing the bottom outlet of push rod shaft, described cavity correspondence is provided with successively the supporting sleeve and the O RunddichtringO that are enclosed within push rod shaft, to realize support and the sealing to push rod shaft.
The invention has the beneficial effects as follows:
1, Worm gear ball wedge disc type electric parking brake of the present invention makes parking brake handle grip replaced, simplified further with respect to conventional truck parking braking system control gear, save cab space, the physical output while having reduced driver's parking.
2,, owing to adopting Worm and worm-wheel gearing, its compact structure of comparing with the electric parking brake of other types, stable drive, bearing capacity be strong, realize alternating axis transmission reduces break axial dimension; Adopt ball wedge disc mechanism to rotatablely move and be converted into straight line motion, structure is simplified greatly, can eliminate brake noise, realize clearance self-regulating simultaneously.
3. owing to adopting Worm and worm-wheel gearing, therefore can realize reverse self-locking, therefore power consumption when long-time parking can be reduced.
4, Worm gear ball wedge disc type electric parking brake of the present invention is on the disk brake assembly with parking and braking mechanism, to add new structure to improve design in tradition, compare with the electric parking brake of other types, its transformation processing cost is low, and manufacture process and technological process inheritance are good.
Brief description of the drawings
Fig. 1 is shape assumption diagram of the present invention.
Fig. 2 is structure sectional view of the present invention.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the structural representation of wedge dish of the present invention.
Fig. 5 is the B-B sectional view of Fig. 4.
Fig. 6 is the C-C sectional view of Fig. 4.
Fig. 7 is the structural representation of push rod shaft of the present invention.
Fig. 8 is decomposing type axonometric projection graph of the present invention.
In figure: 1, brake-caliper support, 2, outer brake slipper, 3, braking clamp body, 301, connecting body, 302, cavity, 303, positioning groove, 4, folding protecting cover, 5, guide finger, 6, clamping bolt, 7, housing, 701, positioning boss, 8, motor cover for seat, 9, connecting bolt, 10, worm screw, 11, worm gear, 1101, worm-wheel shaft, 1102, worm gear dish, 12, bearing, 13, supporting sleeve, 14, O RunddichtringO, 15, wedge dish, 1501, scalloped recess, 16, positioning screwn, 17, ball, 18, push rod shaft, 1801, pit, 19, interior jump ring, 20, copper backing, 21, pressure spring, 22, spring stop collar, 2201, rectangle gap, 23, piston packing, 24, dust-proof cover, 25, brake disc, 26, limiting stopper, 27, inside brake piece, 28, piston, 29, self-regulated nut, 30, thrust ball bearing, 31, flower shape sheet, 32, self-regulated nut back-up ring, 33, waveform elastic sheet, 34, self-regulated screw rod, 35, drive motor, 36, supporting disk, 37, bearing cap, 38, bearing, 39, position limit pin, 40, damping ring, 41, piston assembly, 42, push-rod assembly.
Embodiment
As shown in Figure 1, Figure 2 with shown in Fig. 8, Worm gear ball wedge disc type electric parking brake of the present invention, comprise actuation gear and brake caliper assy, described brake caliper assy comprises brake-caliper support 1, braking clamp body 3, inside brake piece 27, outer brake slipper 2, push-rod assembly 42 and piston assembly 41.
Described braking clamp body 3 is by a connecting body 301 and an integral structure that cavity 302 forms, connecting body 301 both sides of braking clamp body 3 upper ends are symmetrically fixed with two guide fingers 5 by clamping bolt 6, and insert respectively in jack corresponding to two of 1 upper ends of brake-caliper support and for being slidably matched by guide finger 5, braking clamp body 3 can be slid axially along guide finger 5 on brake-caliper support 1; Guide finger 5 roots respectively fixed cover be provided with folding protecting cover 4, folding protecting cover 4 is clamped between the major part nut of guide finger 5 and the jack end face of brake-caliper support 1.Described inside and outside two brake slipper are stuck on brake-caliper support 1 by stopper spring respectively and are positioned at brake disc 25 both sides, brake slipper can be moved axially but play up and down.On the connecting body 301 of described braking clamp body 3, corresponding outer brake slipper 2 one end are arranged with the claw of two one, two claws and the outer side contacts of outer brake slipper 2.
As shown in Fig. 2, Fig. 4-Fig. 6, described push-rod assembly 42 and piston assembly 41 are located in the cavity 302 of braking clamp body 3 successively, and described push-rod assembly 42 comprises the wedge dish 15, multiple ball 17, push rod shaft 18, self-regulated screw rod 34, pressure spring 21 and the spring stop collar 22 that are located at successively in described cavity 302.Described wedge dish 15 is annular slice and the endoporus bottom that is fixed on described cavity 302 by a positioning screwn 16, on its corresponding ball 17 1 side end faces, be along the circumferential direction evenly equipped with multiple scalloped recess 1501, and the degree of depth of scalloped recess 1501 while braking along push rod shaft 18 relative sense of rotation shoal gradually.As nonrestrictive preferred, in the present embodiment, scalloped recess 1501 is three, and the corresponding central angle of each scalloped recess 1501 is 50 degree.
As shown in Figure 2 and Figure 7, described push rod shaft 18 is for multidiameter shaft shape and miner diameter end are passed by cavity 302 bottoms of Xie Pan 15 centers and braking clamp body 3 and be connected with the driving mechanism of actuation gear, for transmitting torque.Uniform hemispherical dimples 1801 along the circumferential direction on the shaft shoulder of corresponding wedge dish 15 1 sides of push rod shaft 18, pit 1801 and described scalloped recess 1501 are corresponding and equate with ball 17 quantity one by one, described ball 17 lays respectively between corresponding pit 1801 and scalloped recess 1501, for generation of end thrust.In passing the bottom outlet of push rod shaft 18, described cavity 302 correspondences are provided with successively the supporting sleeve 13 and the O RunddichtringO 14 that are enclosed within push rod shaft 18, to realize support and the sealing to push rod shaft 18.
Described self-regulated screw rod 34 is multidiameter shaft shape, and its one end, large footpath, near described push rod shaft 18, is set with copper backing 20 on the spindle nose of one end, large footpath of self-regulated screw rod 34, and copper backing 20 is clamped between self-regulated screw rod 34 and push rod shaft 18; To reduce the spin friction resistance of self-regulated screw rod 34 to push rod shaft 18.The miner diameter end of self-regulated screw rod 34 is passed by spring stop collar 22 bottoms and is threaded with the self-regulated nut 29 of described piston assembly 41, for transferring axial thrust and realize clearance self-regulating.
Described spring stop collar 22 is provided with the cup-shaped components of through hole for bottom, its endoporus and outer wall are stepped, spring stop collar 22 be enclosed within described pressure spring 21, self-regulated screw rod 34 bigger diameter end, copper backing 20, push rod shaft 18 and wedge dish 15 outside and be stuck in the endoporus bottom of described cavity 302 by interior jump ring 19, for realizing the axial limiting of push-rod assembly 42, can restraining spring stop collar 22 moving axially to piston assembly 41 directions by interior jump ring 19.Be positioned at its endoporus ladder place is arranged with along its axial arranged rectangle gap 2201 at spring stop collar 22 middle parts, on the outer wall of one end, large footpath of self-regulated screw rod 34, be arranged with the rectangular boss snapping in respectively in rectangle gap 2201, with the circular-rotation of restriction self-regulated screw rod 34, thereby guarantee to realize clearance self-regulating.
Described piston assembly 41 comprises the piston 28 being slidably matched with cavity 302 inwalls, described inside brake piece 27 is close in piston 28 exterior edge faces, between piston 28 and described cavity 302, be provided with dust-proof cover 24 and piston packing 23, dust-proof cover 24 and piston packing 23 are stuck in and are positioned at the annular groove of cavity 302 inwalls near its inner port place, and dust-proof cover 24 is positioned at the outside of piston packing 23, described piston packing 23 is enclosed within on piston 28 outer walls by interference fit, to help rear reset of piston 28 brakings, in the shoulder hole of piston 28, be fitted with self-regulated nut 29, self-regulated nut 29 outer walls are the cylindrical section external diameter that stepped cylindrical body and the annular boss diameter that is positioned at middle part are greater than its both sides, on self-regulated nut 29, be positioned at the wherein annular boss outside of portion and be set with successively thrust ball bearing 30, two colored shape sheets 31, waveform elastic sheet 33 and self-regulated nut back-up ring 32, described thrust ball bearing 30 outer rings are sealed by adjacent colored shape sheet 31, described waveform elastic sheet 33 is clipped between two colored shape sheets 31, described self-regulated nut 29, thrust ball bearing 30, flower shape sheet 31 and waveform elastic sheet 33 are stuck in the shoulder hole of piston 28 by self-regulated nut back-up ring 32, to eliminate brake noise, avoid collision between self-regulated nut 29 and piston 28.
The annular boss of self-regulated nut 29 and piston 28 endoporus ladder cards along between be processed with the conical surface cooperatively interacting, to guarantee that the axial motion of self-regulated nut 29 is passed to piston 28.On the annular boss shaft shoulder of self-regulated nut 29, be along the circumferential direction evenly equipped with six through holes, so that brake fluid when service brake flows.The endoporus of described self-regulated nut 29 is stepped through hole, its small diameter one end is tapped hole and is threaded with self-regulated screw rod 34, its one end, large footpath is unthreaded hole and is installed with a limiting stopper 26 by interference fit, with the distance that moves axially of restriction self-regulated screw rod 34, prevent that self-regulated screw rod 34 tops are to the interior hole end surface of piston 28.Described colored shape sheet 31 is an along the circumferential direction uniform annular flake that processes six grooves, thereby can play the power that the self-regulated nut back-up ring 32 that is stuck in piston 28 inside grooves is subject to and pass to waveform elastic sheet 33 and self-regulated nut 29, while not hindering service brake again, hydraulic oil flows.Described waveform elastic sheet 33 is an annular flake and stamps out a circle circular arc projection, can produce axial deformation.
As shown in Figure 1-Figure 3, described actuation gear comprises by multiple connecting bolts 9 and is fixed on the housing 7 away from brake slipper one end on described braking clamp body 3, described housing 7 is integrative-structures that the hollow box body uncovered by one side and the Special-shaped flange that is located at the uncovered side of casing form, on the opposing end surface between Special-shaped flange and the braking clamp body 3 of housing 7, be respectively equipped with the circular orientation boss 701 and the positioning groove 303 that cooperatively interact, to guarantee the connection coaxiality of housing 7 and braking clamp body 3.In housing 7, driving mechanism is installed, drives described push rod shaft 18 to rotate for transmitting torque.
Described driving mechanism is Worm and worm-wheel gearing and comprises intermeshing worm gear 11 and worm screw 10, and its velocity ratio is between 15 to 30 according to the different spans of vehicle, and wherein worm screw 10 is arranged on the interior bottom of described housing 7 by the bearing 38 at its two ends; Described worm gear 11 is the integral structures that are made up of worm-wheel shaft 1101 and worm gear dish 1102, its worm-wheel shaft 1101 one end are arranged on described housing 7 the inners by bearing 12, the other end is arranged on corresponding housing 7 one end on described braking clamp body 3 by bearing 12, and described push rod shaft 18 is coaxially pegged graft by spline with described worm-wheel shaft 1101.Because the brake clearance of brake slipper and brake disc 25 is less, worm gear 11 conventionally rotation is no more than 90 degree, therefore be weight reduction, it is fan-shaped that described worm gear dish 1102 is processed as, and central angle corresponding to worm-gear tooth part is 90 degree.
On housing 7, the installation inlet side of corresponding worm screw 10 is connected with a bearing cap 37 and motor cover for seat 8 in turn by bolt, drive motor 35 is installed in motor cover for seat 8, drive motor 35 output shaft end housings 7 are regular hexagon, and coordinate with the regular hexagon endoporus at motor cover for seat 8 middle parts, with limit drive motor 35 radially and circular movement.Described drive motor 35 is DC servo motor and is fixed by screws on a supporting disk 36, the ladder card of described supporting disk 36 by its outer rim is along being stuck in the port of motor cover for seat 8 and fixing by screw with motor cover for seat 8, drive motor 35 output shafts insert in worm screw 10 outer end center holes and connect by key, move for drive transmission device.Between motor cover for seat 8 the inners and drive motor 35, be provided with damping ring 40, to protect drive motor 35, alleviate vibration.
Braking rotation extreme position at the corresponding worm gear dish 1102 of described housing 7 inwall one side is fixed with a position limit pin 39 by interference fit, to guarantee in the time that drive motor 35 parking moments reach maximum value, limit the maximum angle of swing of worm gear 11, avoid occurring causing the phenomenon of transmission failure to occur when brake slipper excessive abrasion rear worm wheel worm screw departs from engagement.
The working principle of Worm gear ball wedge disc type electric parking brake of the present invention is as follows:
When parking braking, drive motor 35 forwards, drive worm screw 10 to rotate, slow down to increase by Worm and worm-wheel gearing and turn round rear drive worm-wheel shaft 1101 and rotate, worm-wheel shaft 1101 passes to push rod shaft 18 by spline drived by rotation, because wedge dish 15 end faces have scalloped recess 1501, and when the degree of depth of scalloped recess 1501 is braked along push rod shaft 18, relative sense of rotation shoals gradually, when push rod shaft 18 is rotated, under the effect of ball 17, produce and move axially, to move axially by copper backing 20 and pass to self-regulated screw rod 34 simultaneously, self-regulated screw rod 34 is moved axially, when compression pressure spring 21, promote the self-regulated nut 29 being threaded with it, self-regulated nut 29 contacts all the time with the piston 28 endoporus conical surfaces, piston 28 is produced to be moved axially, thereby promote inside brake piece 27 and press to brake disc 25 1 sides, and braking clamp body 3 can move relative to brake-caliper support 1 along guide finger 5, the opposite force meanwhile acting on braking clamp body 3 by ball 17 and wedge dish 15 moves braking clamp body 3, drive the outer brake slipper 2 mobile opposite side that presses to brake disc 25 in the other direction, until two brake slipper clamp brake disc 25, produce friction torque, make wheel braking.
When releasing brake power, drive motor 35 reverses, drive push rod shaft 18 to reverse by Worm and worm-wheel gearing, ball 17 is got back to the initial position of scalloped recess 1501, self-regulated screw rod 34 and push rod shaft 18 produce axial reverse movement under the effect of pressure spring 21 restoring forces, and drive self-regulated nut 29 to reset, the piston packing 23 that is enclosed within piston 28 outsides in process due to generation braking force is out of shape, rubber seal need to be recovered distortion and also drive piston 28 to reset, make to recover between brake slipper and brake disc 25 certain brake clearance, thereby releasing brake power, in braking force releasing course, due to pressure spring 21, waveform elastic sheet 33, flower shape sheet 31 acts on, make the piston 28 endoporus conical surfaces and self-regulated nut 29 outer conical surface, self-regulated screw rod 34 and copper backing 20 and push rod shaft 18 end face close contacts, guarantee does not produce impact while again implementing parking braking.
Implement service brake under brake clearance is greater than the situation of setting value time, piston 28 moves to left under hydraulic pressure, after the gap between flower shape sheet 31 and thrust ball bearing 30 disappears, the suffered hydraulic thrust of piston 28 is just by self-regulated nut back-up ring 32, waveform elastic sheet 33, flower shape sheet 31 and thrust ball bearing 30 act on self-regulated nut 29 flanges, because self-regulated screw rod 34 is subject to spring stop collar 22, push rod shaft 18 and pressure spring 21 limit, can not rotate and can not move, so this end thrust just forces self-regulated nut 29 to rotate, and till moving to the disappearance of break excessive gaps with piston 28 with respect to self-regulated screw rod 34, now waveform elastic sheet 33 is out of shape.Remove hydraulic pressure back piston seal ring 23 and make piston 28 return to brake clearance to equal the position of setting value, waveform elastic sheet 33 one end restore to the original state because suffered piston 28 thrusts disappear, the axial position that 29, self-regulated nut reaches while remaining on braking is motionless, thereby ensure that the gap between colored shape sheet 31 and thrust ball bearing 30 is setting value, realized clearance self-regulating.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification and mode of execution, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (10)
1. a Worm gear ball wedge disc type electric parking brake, comprises actuation gear and brake caliper assy, and described brake caliper assy comprises push-rod assembly and the piston assembly in the cavity that is located at braking clamp body, it is characterized in that:
Described push-rod assembly comprises the wedge dish, ball, push rod shaft, self-regulated screw rod, pressure spring and the spring stop collar that are located at successively in described cavity;
Described spring stop collar is enclosed within the outside of described pressure spring, self-regulated screw rod, push rod shaft and wedge dish and is stuck in described cavity endoporus bottom by interior jump ring, for realizing the spacing of push-rod assembly;
Described push rod shaft is that multidiameter shaft shape and miner diameter end are passed by described cavity and be connected with the driving mechanism of actuation gear, for transmitting torque; Described ball is multiple and to be uniformly clamped between push rod shaft and wedge dish, produces end thrust when making push rod shaft rotation brake; The miner diameter end of described self-regulated screw rod is passed and is connected with the self-regulated nut thread of described piston assembly by spring stop collar bottom, for transferring axial thrust and realize clearance self-regulating;
Described actuation gear comprises:
Housing, is fixed on described braking clamp body away from brake slipper one end;
Driving mechanism, it is Worm and worm-wheel gearing and is arranged in housing, drives described push rod shaft rotation for transmitting torque;
Drive motor, is arranged on housing one side by a motor cover for seat, and is connected with worm screw one end of driving mechanism, moves for drive transmission device.
2. Worm gear ball wedge disc type electric parking brake according to claim 1, it is characterized in that: described self-regulated screw rod is multidiameter shaft shape, its one end, large footpath is near described push rod shaft, on the spindle nose of one end, large footpath of self-regulated screw rod, be set with copper backing, copper backing is clamped between self-regulated screw rod and push rod shaft, to reduce the spin friction resistance of self-regulated screw rod to push rod shaft.
3. Worm gear ball wedge disc type electric parking brake according to claim 1, it is characterized in that: described wedge dish is annular slice and the endoporus that is fixed on described cavity bottom, on its corresponding ball one side end face, be along the circumferential direction evenly equipped with multiple scalloped recess, and the degree of depth of scalloped recess while braking along push rod shaft relative sense of rotation shoal gradually; Uniform hemispherical dimples along the circumferential direction on the shaft shoulder of the corresponding wedge dish of push rod shaft one side, pit and described scalloped recess are corresponding and equate with ball quantity one by one, and described ball lays respectively between corresponding pit and scalloped recess, for generation of end thrust.
4. according to the Worm gear ball wedge disc type electric parking brake described in claim 2 or 3, it is characterized in that: described spring stop collar is the cup-shaped that bottom is provided with through hole, its endoporus and outer wall are stepped, be arranged with along its axial arranged rectangle gap at spring stop collar middle part, on the outer wall of one end, large footpath of self-regulated screw rod, be arranged with the rectangular boss snapping in respectively in rectangle gap, with the circular-rotation of restriction self-regulated screw rod, thereby guarantee to realize clearance self-regulating.
5. Worm gear ball wedge disc type electric parking brake according to claim 1, it is characterized in that: described driving mechanism comprises intermeshing worm gear and worm screw, described worm gear is to be made up of worm-wheel shaft and worm gear dish, its worm-wheel shaft one end is arranged on described housing the inner by bearing, and the other end is arranged on corresponding housing one end on braking clamp body by bearing; Described worm gear dish is fan-shaped, and central angle corresponding to its worm-gear tooth part is 90 degree.
6. Worm gear ball wedge disc type electric parking brake according to claim 5, is characterized in that: described push rod shaft and described worm-wheel shaft are coaxially pegged graft by spline.
7. Worm gear ball wedge disc type electric parking brake according to claim 1 or 5, it is characterized in that: described drive motor is DC servo motor and is fixed in motor cover for seat by a supporting disk, worm screw one end that drive motor output shaft inserts driving mechanism also connects by key.
8. Worm gear ball wedge disc type electric parking brake according to claim 1, it is characterized in that: described housing and braking clamp body are affixed by multiple connecting bolts, on the opposing end surface between housing and braking clamp body, be respectively equipped with the circular orientation boss and the positioning groove that cooperatively interact, to guarantee the connection coaxiality of housing and braking clamp body.
9. Worm gear ball wedge disc type electric parking brake according to claim 1 or 5, it is characterized in that: the braking rotation extreme position at the corresponding driving mechanism worm gear of described inner walls one side dish is provided with a position limit pin, to guarantee in the time that drive motor parking moment reaches maximum value, limit the maximum angle of swing of worm gear, avoid occurring causing the phenomenon of transmission failure to occur when brake slipper excessive abrasion rear worm wheel worm screw departs from engagement.
10. according to the Worm gear ball wedge disc type electric parking brake described in claim 1-3 any one claim, it is characterized in that: described piston assembly comprises the piston being slidably matched with cavity, described inside brake piece is close in piston exterior edge face, between piston and described cavity, be provided with dust-proof cover and piston packing, in the shoulder hole of piston, be fitted with self-regulated nut, on self-regulated nut, be set with successively thrust ball bearing, two colored shape sheets that structure is identical, waveform elastic sheet and self-regulated nut back-up ring, described self-regulated nut, thrust ball bearing, flower shape sheet and waveform elastic sheet are stuck in piston by self-regulated nut back-up ring, to eliminate brake noise, avoid colliding between self-regulated nut and piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417523.6A CN104196922A (en) | 2014-08-20 | 2014-08-20 | Worm gear, worm, ball and wedge-disc type electronic parking brake |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417523.6A CN104196922A (en) | 2014-08-20 | 2014-08-20 | Worm gear, worm, ball and wedge-disc type electronic parking brake |
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| CN104196922A true CN104196922A (en) | 2014-12-10 |
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|---|---|---|---|
| CN201410417523.6A Pending CN104196922A (en) | 2014-08-20 | 2014-08-20 | Worm gear, worm, ball and wedge-disc type electronic parking brake |
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| CN106314407A (en) * | 2016-06-06 | 2017-01-11 | 浙江万安科技股份有限公司 | Clamp type electronic parking speed reduction structure |
| CN107420460A (en) * | 2017-09-13 | 2017-12-01 | 浙江师范大学 | A kind of electric mechanical brake-by-wire device |
| CN108591309A (en) * | 2018-05-11 | 2018-09-28 | 重庆动霸科技有限公司 | Motor tricycle mechanical disc brake caliper |
| CN108825686A (en) * | 2018-08-31 | 2018-11-16 | 万向钱潮（上海）汽车系统有限公司 | A kind of electromechanical brake |
| CN108839646A (en) * | 2018-07-31 | 2018-11-20 | 浙江亚太机电股份有限公司 | New E PB parking structure |
| CN109282018A (en) * | 2018-11-30 | 2019-01-29 | 江苏沃得农业机械配件制造有限公司 | A kind of combined type wheel bridge gearbox |
| CN109404442A (en) * | 2018-12-17 | 2019-03-01 | 隆中控股集团股份有限公司 | A kind of double sealing structure of disk brake |
| CN109424670A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN109849886A (en) * | 2019-03-01 | 2019-06-07 | 泰牛汽车技术(苏州)有限公司 | The integrated form EPB driving device of parking braking |
| CN112512882A (en) * | 2018-09-26 | 2021-03-16 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Electric wheel brake actuator with improved end position detection |
| CN112594304A (en) * | 2020-12-08 | 2021-04-02 | 万向钱潮（上海）汽车系统有限公司 | Disc brake |
| CN113280062A (en) * | 2021-05-28 | 2021-08-20 | 长安大学 | Self-locking brake of operating mechanism |
| CN113374807A (en) * | 2021-07-29 | 2021-09-10 | 山东力得汽车科技股份有限公司 | Air pressure disc brake |
| CN113401099A (en) * | 2021-06-03 | 2021-09-17 | 浙江力邦合信智能制动系统股份有限公司 | Brake actuator for service brake and parking brake |
| CN114810867A (en) * | 2022-04-24 | 2022-07-29 | 上海应用技术大学 | Disc brake for car that heat dissipation is high-efficient and have shock-absorbing function |
| CN116929851A (en) * | 2023-08-11 | 2023-10-24 | 富兰克科技(广东)有限公司 | Lubricating oil production sampling device |
| WO2024046073A1 (en) * | 2022-08-30 | 2024-03-07 | 芜湖伯特利汽车安全系统股份有限公司 | Brake caliper |
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| CN106314407A (en) * | 2016-06-06 | 2017-01-11 | 浙江万安科技股份有限公司 | Clamp type electronic parking speed reduction structure |
| CN109424670A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN107420460B (en) * | 2017-09-13 | 2023-04-07 | 浙江师范大学 | Electronic mechanical brake-by-wire |
| CN107420460A (en) * | 2017-09-13 | 2017-12-01 | 浙江师范大学 | A kind of electric mechanical brake-by-wire device |
| CN108591309A (en) * | 2018-05-11 | 2018-09-28 | 重庆动霸科技有限公司 | Motor tricycle mechanical disc brake caliper |
| CN108591309B (en) * | 2018-05-11 | 2024-08-16 | 重庆动霸科技有限公司 | Mechanical disc brake caliper for motor tricycle |
| CN108839646A (en) * | 2018-07-31 | 2018-11-20 | 浙江亚太机电股份有限公司 | New E PB parking structure |
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| US12084015B2 (en) | 2018-09-26 | 2024-09-10 | Continental Teves Ag & Co Ohg | Electrical wheel brake actuator with improved end position recognition |
| CN112512882A (en) * | 2018-09-26 | 2021-03-16 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Electric wheel brake actuator with improved end position detection |
| CN109282018A (en) * | 2018-11-30 | 2019-01-29 | 江苏沃得农业机械配件制造有限公司 | A kind of combined type wheel bridge gearbox |
| CN109404442B (en) * | 2018-12-17 | 2023-08-29 | 隆中控股集团股份有限公司 | Double-sealing structure of disc brake |
| CN109404442A (en) * | 2018-12-17 | 2019-03-01 | 隆中控股集团股份有限公司 | A kind of double sealing structure of disk brake |
| CN109849886A (en) * | 2019-03-01 | 2019-06-07 | 泰牛汽车技术(苏州)有限公司 | The integrated form EPB driving device of parking braking |
| CN112594304A (en) * | 2020-12-08 | 2021-04-02 | 万向钱潮（上海）汽车系统有限公司 | Disc brake |
| CN113280062A (en) * | 2021-05-28 | 2021-08-20 | 长安大学 | Self-locking brake of operating mechanism |
| CN113401099A (en) * | 2021-06-03 | 2021-09-17 | 浙江力邦合信智能制动系统股份有限公司 | Brake actuator for service brake and parking brake |
| CN113374807A (en) * | 2021-07-29 | 2021-09-10 | 山东力得汽车科技股份有限公司 | Air pressure disc brake |
| CN114810867A (en) * | 2022-04-24 | 2022-07-29 | 上海应用技术大学 | Disc brake for car that heat dissipation is high-efficient and have shock-absorbing function |
| WO2024046073A1 (en) * | 2022-08-30 | 2024-03-07 | 芜湖伯特利汽车安全系统股份有限公司 | Brake caliper |
| CN116929851A (en) * | 2023-08-11 | 2023-10-24 | 富兰克科技(广东)有限公司 | Lubricating oil production sampling device |
| CN116929851B (en) * | 2023-08-11 | 2024-04-02 | 富兰克科技(广东)有限公司 | Lubricating oil production sampling device |
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