CN107128295B - A kind of brake-by-wire device based on direct current generator power-assisted - Google Patents
A kind of brake-by-wire device based on direct current generator power-assisted Download PDFInfo
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- CN107128295B CN107128295B CN201710494798.3A CN201710494798A CN107128295B CN 107128295 B CN107128295 B CN 107128295B CN 201710494798 A CN201710494798 A CN 201710494798A CN 107128295 B CN107128295 B CN 107128295B
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- rod
- valve
- mounting bracket
- pedal
- master cylinder
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a kind of brake-by-wire devices based on direct current generator power-assisted, in the apparatus, ball screw assembly, is mounted on case inside rear by bearing, valve block, which slides axially, to be connected in the shell of ball screw assembly, front end, valve body is installed in clutch pedal mounting bracket in valve block front end face, and clutch pedal mounting bracket slides axially and is connected in valve body, pedal-rod sequentially passes through roller screw screw rod from rear to preceding in an axial direction, valve block, clutch pedal mounting bracket and valve body, locking plate is by pedal-rod together with clutch pedal mounting bracket clamping locking, valve rod assembly is connected to the rear end of pedal-rod, it is axially connecting in the front end of pedal-rod to brake cylinder component, direct current generator is mounted below hull outside, pinion gear is mounted on motor output shaft, gear wheel is mounted on the outside of ball-screw nut, gear wheel is engaged with pinion gear.For the present invention by brake device structure reasonably optimizing, keeping its small, integrated level is high, can effectively save braking system volume shared in arrangement.
Description
Technical field
The invention belongs to brake system of car technical fields.More specifically to a kind of based on direct current generator power-assisted
Brake-by-wire device.
Background technology
The braking system generally use vacuum booster unit of orthodox car, the disadvantage is that volume is larger, complicated, integrated
It spends that relatively low, part is complex and big to engine degree of dependence, vacuum servo system has been eliminated on current most of automobiles
The use of system.It is rapidly developed with the totality of current automobile industry, people propose the integration of automobile and lightweight very high
Requirement, the demand of the brake device for car of high integration also gradually increases.Performance is stablized in order to meet correlative technology field
And the pursuit of the high braking system of integrated level is needed with research and development, people have gradually started the research to line control brake system and spy
Rope.
Having studied ripe line control brake system at present mainly has " mechanical line control brake system " and " fluid pressure type line traffic control
Braking system ".Fluid pressure type line control brake system generally use motor booster type structure, is controlled by electronic control unit ECU
Motor, to realize the fast braking under conventional operating mode and failure damped condition.And now motor booster type fluid pressure type line traffic control
General its brake apparatus parts of braking system itself are more, and arrangement gets up more to disperse, so current brake apparatus is deposited
Larger in volume, integrated level is relatively low, arranges that occupied area is larger on automobile chassis, is unfavorable for emerging ev industry to height
Many defects such as the requirement of integrated level.
Invention content
Defect in the presence of for the above-mentioned prior art, the present invention provides a kind of line traffic controls based on direct current generator power-assisted
Brake apparatus, to reduce the volume of brake apparatus, improve integrated level.In conjunction with Figure of description, technical scheme is as follows：
A kind of brake-by-wire device based on direct current generator power-assisted, by valve rod assembly, shell, ball screw assembly, valve block
16, pedal-rod 17, valve body 18, clutch pedal mounting bracket 19, locking plate 20, braking cylinder component, direct current generator 31, pinion gear 36 and gear wheel 39
Composition；
The ball screw assembly, that roller screw screw rod 5 and ball-screw nut 6 form is mounted on by bearing in shell
Side rear, the valve block 16, which slides axially, to be connected in the shell of ball screw assembly, front end, valve body 18 and clutch pedal mounting bracket 19
It is installed in 16 front end face of valve block, and clutch pedal mounting bracket 19 slides axially and is connected in valve body 18；The pedal-rod 17
In an axial direction roller screw screw rod 5, valve block 16, clutch pedal mounting bracket 19 and valve body 18, and pedal-rod 17 are sequentially passed through from rear to preceding
After clutch pedal mounting bracket 19, locking plate 20 is radially by pedal-rod 17 together with the clamping locking of clutch pedal mounting bracket 19；
The valve rod assembly is axially connecting in the rear end of the pedal-rod 17, the braking cylinder component it is axially connecting
The front end of the pedal-rod 17, driver input successively through valve rod assembly, pedal-rod 17, checking cylinder group the displacement of brake pedal
Part is finally-transmitted to master cylinder 26；
The direct current generator 31 is mounted below hull outside, and motor output shaft 33 pierces into case inside, the pinion gear
36 are mounted on motor output shaft 33, and the gear wheel 39 is mounted on the outside of ball-screw nut 6, and gear wheel 39 and small tooth
36 engagement of wheel, the rotary motion of motor output shaft 33 are transferred to ball-screw nut 6 through pinion gear 36, gear wheel 39, roll successively
The 5 tandem movement of the rotation driving roller screw of screw nut 6 screw rod.
The valve rod assembly is made of u shaped connector 1, valve rod 2, rubber sleeve 3 and valve rod return spring 4, the front end of valve rod 2 with
17 rear end sphere-contact connection of pedal-rod, rear end and the u shaped connector 1 of valve rod 2 are connected, and valve rod return spring 4 is sleeved on valve rod 2
Front end outer side, rubber sleeve 3 are coated on the outside of valve rod return spring 4.
The braking cylinder component is by master cylinder push rod seat 22, master cylinder push rod 24, damping rubber block 23, main cylinder piston-rod 25, system
Dynamic master cylinder 26 and master cylinder push rod return spring 27 form, and master cylinder push rod seat 22 is mounted on 18 front end of valve body, and damping rubber block 23 is pacified
Between 22 bottom of master cylinder push rod seat and pedal-rod 17, before 24 one end of master cylinder push rod is connected in master cylinder push rod seat 22 in an axial direction
End, 24 other end of master cylinder push rod and the blind via bottom of 25 rear end face of main cylinder piston-rod connect, master cylinder push rod return spring 27
It is sleeved on 22 outside of master cylinder push rod seat, 27 one end of master cylinder push rod return spring acts against on the front end face of valve body 18, other end top
It leans against on shell inner face, the master cylinder 26 is fixed on by ring flange on the outside of housing forward end.
The shell is made of back casing 12 and procapsid 28, by being located at pair between the back casing 12 and procapsid 28
Two positioning pins 35 of Angle Position realize butt junction location, and part is bolted and is assembled together, to ensure two housings in work
Relative position remains unchanged in work；
Two translots are provided with to parallel and symmetrical on the inner surface of procapsid 28 along the longitudinal direction, the sliding of valve block 16 connects
It is connected in the translot.
It is opened there are one through-hole at the center of valve block 16, the valve block 16 is mounted on the front side of ball-screw screw rod 5, valve
Housing 16, which is coordinated by the through-hole at its center with the boss of 5 front end of ball-screw screw rod, to be installed；
Through-hole both sides at 16 center of valve block are symmetrically opened up there are two trapezoidal slot hole, the left side in 19 end face of clutch pedal mounting bracket
Right both sides, are arranged with two trapezoidal side plates, and two trapezoidal side plates of the clutch pedal mounting bracket 19 are vertically inserted in corresponding trapezoidal length
In hole；
It is further opened with two arc short-bore on the outside of two trapezoidal slot holes of the valve block 16, the two of the valve body 18
A arc otic placode is vertically mounted in corresponding arc short-bore；
In the end positions of valve block 16, two rectangular shaped sliders are arranged with, the rectangular shaped slider is slidably connected at front housing
In the translot opened up in body 28, valve block 16 is made to be slid back and forth along translot in procapsid 28.
It opens there are one centre bore, the left and right sides in 19 end face of clutch pedal mounting bracket, and hangs down at the center of the clutch pedal mounting bracket 19
Directly in 19 end face of clutch pedal mounting bracket, two trapezoidal side plates are arranged with, the trapezoidal slot hole of the trapezoidal side plate and valve block 16 coordinates
Installation；
It on each trapezoidal side plate, symmetrically opens there are two L-type lockhole, the L-type lockhole is back-to-back symmetrical above and below to be set
It sets, the L-type lockhole is matched with locking plate 20, and after pedal-rod 17 is installed in the centre bore of clutch pedal mounting bracket 19, locking plate 20 is pacified
It is inserted into L-type lockhole, pedal-rod 17 is radially locked in clutch pedal mounting bracket 19；
Two rectangular shaped sliders are also arranged in the upper and lower side of clutch pedal mounting bracket 19, the rectangular shaped slider is slidably connected at valve body
In the translot opened up in 18, clutch pedal mounting bracket 19 is made to be slid back and forth along translot in valve body 18.
It is equipped with a round boss in the front end of valve body 18, interstitial hole, the round boss are provided at the center of round boss
For being connected with the master cylinder push rod seat 22 of front side, the interstitial hole is for installing pedal-rod 17；The rear end of the valve body 18
If there are two symmetrical arc otic placode, two arc otic placodes of the valve body 18 are vertically fixedly mounted on two arcs of valve block 16
In shape short-bore；
Two translots are provided with to parallel and symmetrical on the inner surface of valve body 18 along the longitudinal direction, the sliding of clutch pedal mounting bracket 19 connects
It is connected in the translot.
Compared with prior art, the beneficial effects of the present invention are：
1. it is of the present invention it is a kind of based on the brake-by-wire device of direct current generator power-assisted by existing brake apparatus into
Row Rational structure optimizes, and by the parts Integrated Optimal Design such as master cylinder, braking motor, deceleration device, pedal-rod, makes its body
Product is smaller, and integrated level is higher, can effectively save braking system volume shared in arrangement, facilitate arrangement.
2. it is of the present invention it is a kind of based on the brake-by-wire device of direct current generator power-assisted in braking system direct current generator
When failure, brake master cylinder piston bar is pushed directly on by pedal-rod, realize master cylinder displacement input, failure stability compared with
It is good, travel safety can be effectively improved.
3. a kind of brake-by-wire device based on direct current generator power-assisted of the present invention can be applied not only to motor and help
Dynamic braking system, also can be applicable to line control brake system, can realize that a variety of braking modes, application prospect are relatively broad.
Description of the drawings
Fig. 1 is the entirety sectional view of the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 2 is the A-A sectional views of the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 3 is the directions the B view of the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 4 is the directions the C view of the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 5 is outside drawing after the assembly of the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 6 a are the front view of valve body in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 6 b are the side view of valve body in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 6 c are the vertical view of valve body in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 7 a are the front view of valve block in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 7 b are the side view of valve block in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 7 c are the vertical view of valve block in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 8 a are the front view of clutch pedal mounting bracket in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 8 b are the side view of clutch pedal mounting bracket in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 8 c are the vertical view of clutch pedal mounting bracket in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 9 a are the front view of locking plate in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 9 b are the side view of locking plate in the brake-by-wire device of the present invention based on direct current generator power-assisted；
Fig. 9 c are the vertical view of locking plate in the brake-by-wire device of the present invention based on direct current generator power-assisted；
In figure：
1.U type joints, 2. valve rods, 3. rubber sleeves, 4. valve rod return bullets
Spring,
5. ball-screw screw rod, 6. ball-screw nuts, 7.M6 screws, 8. bearing (ball) covers,
9. sealing ring, 10. ball-screw balls, 11. first angular contact ball bearings, 12. back casings,
13.M6 nuts, 14. spring washers, 15.M6 bolts, 16. valve blocks,
17. pedal-rod, 18. valve bodies, 19. clutch pedal mounting brackets, 20. locking plates,
21. spring base, 22. master cylinder push rod seats, 23. damping rubber blocks, 24. master cylinder push rods,
25. main cylinder piston-rod, 26. master cylinders, 27. master cylinder push rod return springs, 28. procapsids,
29. motor flange disk, 30.M6 hexagon socket head cap screws, 31. direct current generators, 32. second angular contacts
Ball bearing,
33. motor output shaft, 34. second sleeves, 35. positioning pins, 36. pinion gears,
37.M4 nuts, 38. flat keys, 39. gear wheels, 40. first sleeves.
Specific implementation mode
The technical solution for the present invention is further explained, in conjunction with Figure of description, specific implementation mode of the invention is such as
Under：
As shown in Figure 1, the present invention provides a kind of brake-by-wire device based on direct current generator power-assisted, the brake-by-wire
Device is mounted between brake pedal and master cylinder, mainly by u shaped connector 1, valve rod 2, valve rod return spring 4, roller screw
Screw rod 5, ball-screw nut 6, back casing 12, valve block 16, pedal-rod 17, valve body 18, clutch pedal mounting bracket 19, locking plate 20, master cylinder
Ram seat 22, damping rubber block 23, master cylinder push rod 24, main cylinder piston-rod 25, master cylinder 26, master cylinder push rod return spring 27,
Procapsid 28, direct current generator 31, pinion gear 36 and gear wheel 39 form.
As shown in Figure 1 and Figure 5, pass through two positioning pins positioned at diagonal position between the back casing 12 and procapsid 28
35 realize butt junction location, and the connector by being made of M6 bolts, M6 nuts 13 and spring washer 14 is assembled together, to protect
Relative position remains unchanged card two housings at work, and the two forms a main cavity, other critical pieces of the present apparatus are pacified
In the main cavity.
As shown in Fig. 2, the u shaped connector 1 is a u-bracket, the opening of u shaped connector 1 is installed outwardly, in u shaped connector 1
Mounting hole is provided on side plate, u shaped connector 1 is hinged by the brake pedal of mounting hole and automobile, to obtain the position of brake pedal
Move input；The internal thread hole of M10 is provided on the bottom plate of u shaped connector 1, in mating connection with the external screw thread of 2 rear end of valve rod.
The rear end of the valve rod 2 is machined with the external screw thread of M10, and externally threaded tooth form and screw pitch with 1 bottom of u shaped connector
Internal thread it is identical, connected by screw-thread fit between the internal thread of 1 bottom plate of rear end end external screw thread and u shaped connector of valve rod 2；Valve
The front end of bar 2 is bulb, and the bulb matches installation with the blind hole that 17 rear end of pedal-rod opens up；The stage casing of valve rod 2 is equipped with axis
Shoulder.
The roller screw screw rod 5 is tubulose, the internal diameter of roller screw screw rod 5 and the back segment axis outer diameter of pedal-rod 17
Identical, roller screw screw rod 5 is sleeved on the back segment axis of pedal-rod 17, and the ball-screw nut 6 is that front end is equipped with outer
Sleeve-shaped, ball-screw nut 6 are sleeved on the outside of roller screw screw rod 5；The inner circumferential surface and ball of ball-screw nut 6
Spiral helicine arc groove is machined on the external peripheral surface of leading screw screw rod 5, the two is combined together to form spiral rolling track, described
Ball-screw ball 10 is equipped in spiral rolling track；The ball-screw nut 6, ball-screw screw rod 5 and ball-screw ball 10
Ball guide screw nat is formed, effect is the straight line that the rotary motion of ball-screw nut 6 is converted to ball-screw screw rod 5
It is mobile.Outer end face positioned at 6 front end of ball-screw nut is in contact with the end face of 16 rear end of valve block.
The ball-screw nut 6 is fitted in the boss shell of the rear side of back casing 12, and ball-screw nut 6 passes through the
The rear side of one angular contact ball bearing 11 and back casing 12 is connected, and there are one bearing (ball) covers in the installation of the rear end of back casing 12
8, the ring flange of the bearing (ball) cover 8 is fixedly mounted on by six M6 screws 7 on the rear end face of back casing 12, the bearing end
The front end of lid 8 acts against on the outer ring of the first angular contact ball bearing 11, and sealing ring is also equipped in the inside of bearing (ball) cover 8, with
Prevent external dust from entering in back casing 12.
The valve rod return spring 4 is volute spring, the self-return for making valve rod 2；4 rear side of valve rod return spring
Cone end is fixedly connected in the front end face of the 2 stage casing shaft shoulder of valve rod, and the cone bottom end of 4 front side of valve rod return spring is against ball wire
In the back end surface of thick stick nut 6；In addition, also coating a rubber sleeve 3, the rubber in the outside of valve rod return spring 4 and valve rod 2
Gum cover 3 is used to prevent extraneous dust from entering in valve rod 2 and its front end bindiny mechanism.
The gear wheel 39 is mounted on the front side of ball-screw nut 6 by flat key 38, and the front end face of gear wheel 39 abuts against
On the outer rear end face of ball-screw nut 6, between the rear end face of gear wheel 39 and the inner ring of the first angular contact ball bearing 11
There are one the first sleeves 40 for suit, and then realize the axial limiting to gear wheel 39.The gear wheel 39 and ball-screw nut 6
Flat key connects, and enables gear wheel 39 that ball-screw nut 6 to be driven to be rotated, to realize the transmission of power.
As shown in Fig. 2, valve block 16 is mounted in procapsid 28, before the rear end face of valve block 16 acts against back casing 12
It holds on outer, realizes limit.As shown in Figure 1, Figure 2 and shown in Fig. 7a-7c, the valve block 16 is ellipse；In valve block 16
The heart is opened there are one through-hole, and the valve block 16 is mounted on the front side of ball-screw screw rod 5, the through-hole that valve block 16 passes through its center
Coordinate with the boss of 5 front end of ball-screw screw rod and install, the outer front end face of ball-screw nut 6 just acts against valve block 16
Rear end face on；Through-hole both sides at 16 center of valve block, are symmetrical with the short axle of oval valve block 16, open up vertically there are two
Trapezoidal slot hole, clutch pedal mounting bracket 19 are installed on the front side of valve block 16, as shown by figures 8 a-8 c, there are two the clutch pedal mounting bracket 19 is set
Two side plates of trapezoidal side plate, the clutch pedal mounting bracket 19 are vertically mounted in two trapezoidal slot holes of valve block 16；In the valve
Two arc short-bore are further opened on the outside of two trapezoidal slot holes of housing 16, valve body 18 is also installed on the front side of valve block 16,
And valve body 18 is placed on the outside of clutch pedal mounting bracket 19, as shown in fig. 6a-6c, is set there are two symmetrical arc in the tail end of valve body 18
Two arc otic placodes of otic placode, the valve body 18 are vertically mounted in two arc short-bore of valve block 16, and the valve body 18
The arc short-bore of arc otic placode and valve block 16 be interference fit；It is right along the long axis direction both ends of the valve block 16 of ellipse
Title is set is provided with to parallel and symmetrical two translots, valve body along the longitudinal direction there are two rectangular shaped slider on 28 inner surface of procapsid
The rectangular shaped slider of 16 ends of seat is slidably connected in the translot of procapsid 28, before making valve block 16 in procapsid 28 along translot
After slide.
As depicted in figs. 1 and 2, clutch pedal mounting bracket 19 is located at the front side of valve block 16, and is fixedly mounted on valve block 16, and
The clutch pedal mounting bracket 19 is located at the inside of valve body 18.As shown in Figure 1, Figure 2 and shown in Fig. 8 a-8c, the end face of clutch pedal mounting bracket 19 is in up and down
The symmetrical arc of convex, left and right are in symmetrical line shape；The end face center of the clutch pedal mounting bracket 19 is opened there are one centre bore, in this
Heart hole is for installing pedal-rod 17；The left and right sides in 19 end face of clutch pedal mounting bracket, and perpendicular to 19 end face of clutch pedal mounting bracket, symmetrically set
There are two trapezoidal side plate, the trapezoidal slot hole cooperation of the trapezoidal side plate and valve block 16 inserts；Two are equipped on clutch pedal mounting bracket 19
A trapezoidal side plate is symmetrically opened there are two L-type lockhole, the L-type lockhole is back-to-back symmetrical above and below on each trapezoidal side plate
Setting, i.e., outwardly, the L-type lockhole on the trapezoidal side plate in 19 both sides of clutch pedal mounting bracket symmetrically opens up the L-type notch of L-type lockhole, the L
Type lockhole is matched with locking plate 20, and the size of L-type lockhole is slightly larger than the sectional dimension of locking plate 20, and pedal-rod 17 is installed to pedal branch
After in the centre bore of seat 19, locking plate 20 is assigned in L-type lockhole, and across the trapezoidal side plate in side, pedal-rod 17, other side ladder
Shape side plate, realization lock pedal-rod 17 in clutch pedal mounting bracket 19, and clutch pedal mounting bracket 19 is made to be moved synchronously with pedal-rod 17；In pedal
The upper and lower side of 19 end face of bearing is also arranged with two rectangular shaped sliders, parallel and right along the longitudinal direction on the inner surface of valve body 18
It is provided with two translots with claiming, the rectangular shaped slider on 19 end face of clutch pedal mounting bracket is slidably connected in the translot of valve body 18, makes pedal branch
Seat 19 slides back and forth in valve body 18 along translot.
As shown in Fig. 2, valve body 18 is located at the front side of valve block 16, and it is fixedly mounted on valve block 16, and 18 sets of valve body
It is placed in the outside of clutch pedal mounting bracket 19, and there are certain distances between the front end face of valve body 18 and the front end face of clutch pedal mounting bracket 19.Such as
Shown in Fig. 1, Fig. 2 and Fig. 6 a-6c, valve body 18 is ellipse；A round boss is equipped on front side of the end face of valve body 18, round convex
The center of platform is provided with interstitial hole, and the round boss is used to be connected with the master cylinder push rod seat 22 of front side, and the interstitial hole is used
In installation pedal-rod 17；The tail end of the valve body 18 is set there are two symmetrical arc otic placode, two arc ears of the valve body 18
Plate is vertically mounted in two arc short-bore of valve block 16, and the arc otic placode of the valve body 18 and the arc of valve block 16 are short
Hole is interference fit, realizes the fixed installation of valve body 18 and valve block 16；It is parallel along the longitudinal direction on the inner surface of valve body 18
And two translots are symmetrically provided with, clutch pedal mounting bracket 19 slides back and forth along sliding slot.
The round boss of 18 front side of valve body matches installation with the circular groove of 22 rear end of master cylinder push rod seat, and round convex
There are spaces between platform and circular groove, and damping rubber block 23, the appearance of the damping rubber block 23 are filled in the space
Face with round boss and circular groove joint.
It is mutually installed between above-mentioned valve block 16, clutch pedal mounting bracket 19 and valve body 18 and in the presence of being nested with relationship, therefore valve block 16,
The appearance profile of clutch pedal mounting bracket 19 and valve body 18 is mutually matched.
As shown in Fig. 2, pedal-rod 17 is a multi-diameter shaft, the back segment of pedal-rod 17 is mounted on the ball-screw screw rod of sleeve-shaped
It in 5, and is opened there are one blind hole on the rear end face of pedal-rod 17, the blind hole matches installation with the bulb of 2 front end of valve rod；It steps on
The stage casing of plate stem 17 is mounted in clutch pedal mounting bracket 19, and has one section of axle journal, the axle journal and pedal in the rear side vehicle of pedal-rod 17
L-type lockhole and locking plate 20 on 19 trapezoidal side plate of bearing match, and realization locks 17 stage casing of pedal-rod, and then realize and step on
It is locked between board support 19 and pedal-rod 17；The leading portion of pedal-rod 17 is mounted in 18 round boss of valve body, the pedal-rod 17
Front end face and the rear end face of damping rubber block 23 between there are the gaps of 2-3mm；The leading portion of the pedal-rod 17, stage casing and after
It is changeover portion between section.
As shown in Fig. 2, master cylinder push rod seat 22 is mounted on the round boss of 18 leading portion of valve body, the master cylinder push rod seat 22
Leading portion is shaft-like, and back segment is circular groove, and circular groove is matched with the round boss of 18 leading portion of valve body, along the master cylinder push rod
The axial direction of 22 leading portion axis of seat opens the tapped blind hole there are one M6, in mating connection with master cylinder push rod 24.In master cylinder push rod seat
22 outside is equipped with master cylinder push rod return spring 27, and the master cylinder push rod return spring 27 is mounted on master cylinder by spring base 21
On the back segment of ram seat 22, spring base 21 is used to support master cylinder push rod return spring 27, to ensure its normally flexible work, master cylinder
The rear end of push rod return spring 27 acts against in the front end face of valve body 18, before the front end of master cylinder push rod return spring 27 acts against
On the inner side end of shell 28.The back segment outer surface of master cylinder push rod 24 is machined with the external screw thread of M6, with 22 leading portion of master cylinder push rod seat
Axis coaxial threaded connects；The front end of master cylinder push rod 24 is hemisphere planar, the rear end face of the main cylinder piston-rod 25 in master cylinder 26
There are one blind holes for upper processing, and 24 front end hemisphere face of master cylinder push rod is in contact with 25 rear end blind hole bottom surface of main cylinder piston-rod, to lead
Cylinder push rod 24 can transmit displacement input to master cylinder 26.
As shown in Fig. 2, being machined with a through-hole on the front end face of procapsid 28, the through-hole is for the back segment with master cylinder 26
Cooperation installation, the front end face of procapsid 28 are connected with the rear end ring flange of master cylinder 26 by six outer-hexagonal bolts, with
Ensure that the position of master cylinder 26 is fixed；In the lower outside of the procapsid 28, be close to procapsid 28 bottom surface and
There are one the motor groove of major diameter, the size of the motor groove and the appearance and size phases of direct current generator 31 for side processing
Match, to ensure that direct current generator 31 can be placed in the groove, when total system works, the position of direct current generator 31 is fixed；Direct current
The motor flange disk 29 of motor 31 is connected with procapsid 28 by six hexagon socket head cap screws, to ensure the position of direct current generator 31
It is fixed.
As shown in Figure 1, there are one floors for processing below the rear side of the bottom of procapsid 28 and back casing 12, to ensure
The support strength of procapsid 28 and back casing 12.
Pacify as shown in Figure 1, the leading portion of the motor output shaft 33 of direct current generator 31 is supported by the second angular contact ball bearing 32
On the side of procapsid 28, motor output shaft 33 passes through the junction of procapsid 28 and back casing 12, stretches into back casing 12
Interior, the effect of the second angular contact ball bearing 32 is to ensure that motor output shaft 33 can be freely rotated；In motor output shaft 33
By flat key installation there are one pinion gear 36 in section, pinion gear 36 engages connection with the gear wheel 39, motor output shaft 33
Back segment outer surface is machined with external screw thread, and nut 37 is threadedly coupled with the back segment of motor output shaft 33, and then realizes to pinion gear 36
The axial limiting of rear end, there are one second sleeve 34, second sleeves 34 1 for suit on the motor output shaft 33 of 36 front end of pinion gear
End acts against on the front end face of pinion gear 36, and 34 other end of second sleeve acts against the end face of 32 inner ring of the second angular contact ball bearing
On, and then realize the axial limiting to 36 front end of pinion gear.
The modulus and pressure angle all same of the pinion gear 36 and the gear wheel 39, the rotation of pinion gear 36 and gear wheel 39
To on the contrary, the number of teeth of pinion gear 36 is less than the number of teeth of gear wheel 39, and pinion gear 36 is parallel with the axis of gear wheel 39, with guarantor
Demonstrate,prove the normal meshing state of two gears.
The operation principle and the course of work of brake-by-wire device of the present invention based on direct current generator power-assisted are as follows：
1. braking system course of normal operation：
When braking system works normally, there are two power transmission lines, first is：Position of the driver to brake pedal
It moves input to be input in this brake apparatus via the u shaped connector 1 being connected with brake pedal, u shaped connector 1 pushes valve rod 2 into line position
It moves, 2 compression valve rod return spring 4 of valve rod simultaneously pushes pedal-rod 17 to carry out displacement, and pedal-rod 17 overcomes pedal-rod 17 slow with rubber
After rushing the gap between block 23, damping rubber block 23 is pushed to be moved, damping rubber block 23 pushes master cylinder push rod seat 22 to carry out
Displacement, master cylinder push rod seat 22 push main cylinder piston-rod 25 to carry out displacement, final realization pair by coupled master cylinder push rod 24
The driver pedal displacement of master cylinder 26 inputs；Article 2 is：At the same time direct current generator 31 is started to work, defeated by motor
Power is transferred in pinion gear 36 by shaft 33, and pinion gear 36 drives the gear wheel 39 engaged to be rotated, gear wheel 39
Ball-screw nut 6 is driven to be rotated, ball-screw nut 6 is acted on by the transmission of ball-screw ball 6, is rotated fortune
Turn is changed to the straight-line displacement input of ball-screw screw rod 5, and ball-screw screw rod 5 pushes valve block 16 sliding in procapsid 28
It moves, valve block 16 pushes valve body 18 to carry out displacement, and valve body 18 pushes return spring seat 21 to carry out displacement, and return spring seat 21 compresses
Master cylinder push rod return spring 27 simultaneously pushes master cylinder push rod seat 22 to carry out displacement, and master cylinder push rod seat 22 is pushed away by coupled master cylinder
Bar 24 pushes main cylinder piston-rod 25 to move, and realization follows displacement to input the motor power-assisted of master cylinder 26.
By above-mentioned two power transmission lines, master cylinder 26 obtains driver pedal displacement input and motor power-assisted
It follows displacement to input, realizes that the total displacement to master cylinder 26 inputs, wherein motor power-assisted, which follows displacement to input main function, is
Driver pedal displacement is followed to input, to save driver in braking process due to stepping on body spent by brake pedal
Power is determined the laborsaving degree of driver by the working condition of direct current generator 31.
2. emergency braking process when braking system motor failure：
When braking system motor failure, direct current generator 31 is stopped, if driver steps on brake pedal, this system at this time
Dynamic device is operated in emergency braking process status.Driver is to the displacement of brake pedal input via being connected with brake pedal
U shaped connector 1 is input in this brake apparatus, and u shaped connector 1 pushes valve rod 2 to carry out displacement, and 2 compression valve rod return spring 4 of valve rod is simultaneously
Pedal-rod 17 is pushed to carry out displacement, due to the locking effect of locking plate 20 at the stage casing axle journal of pedal-rod 17, locking plate 20 is with pedal
Bar 17 carry out displacement, locking plate 20 due to being inserted in the L-type lockhole of clutch pedal mounting bracket 19, locking plate 20 can push clutch pedal mounting bracket 19 simultaneously into
Line position is moved, and clutch pedal mounting bracket 19 is in the valve body 18 along the translot of valve body 18 into line slip, 19 end face of clutch pedal mounting bracket and 18 end of valve body
Master cylinder realizes all processes for building pressure completely during the distance between face can ensure emergency braking, not will produce movement
Interference after pedal-rod 17 overcomes the gap between pedal-rod 17 and damping rubber block 23, pushes damping rubber block 23 to carry out displacement,
Damping rubber block 23 pushes master cylinder push rod seat 22 to carry out displacement, and master cylinder push rod seat 22 is pushed by coupled master cylinder push rod 24
Main cylinder piston-rod 25 carries out displacement, realizes that the driver pedal displacement to master cylinder 26 inputs.During emergency braking, system
Whole displacements input of dynamic master cylinder 26 is stepped on brake pedal by driver and is realized, to ensure travel safety.
Claims (7)
1. a kind of brake-by-wire device based on direct current generator power-assisted, it is characterised in that：
By valve rod assembly, shell, ball screw assembly, valve block (16), pedal-rod (17), valve body (18), clutch pedal mounting bracket (19), lock
Piece (20), braking cylinder component, direct current generator (31), pinion gear (36) and gear wheel (39) composition；
The ball screw assembly, of roller screw screw rod (5) and ball-screw nut (6) composition is mounted on by bearing in shell
Side rear, the valve block (16), which slides axially, to be connected in the shell of ball screw assembly, front end, valve body (18) and pedal branch
Seat (19) is installed in valve block (16) front end face, and clutch pedal mounting bracket (19) slides axially and is connected in valve body (18)；
The pedal-rod (17) in an axial direction from it is rear to preceding sequentially pass through roller screw screw rod (5), valve block (16), clutch pedal mounting bracket (19) with
And valve body (18), and pedal-rod (17), after clutch pedal mounting bracket (19), locking plate (20) is radially by pedal-rod (17) and pedal branch
Seat (19) clamping locking is together；
The axially connecting rear end in the pedal-rod (17) of the valve rod assembly, the braking cylinder component are axially connecting in institute
The front end of pedal-rod (17) is stated, driver inputs successively through valve rod assembly, pedal-rod (17), checking cylinder the displacement of brake pedal
Component is finally-transmitted to master cylinder (26)；
The direct current generator (31) is mounted below hull outside, and motor output shaft (33) pierces into case inside, the pinion gear
(36) it is mounted on motor output shaft (33), the gear wheel (39) is mounted on the outside of ball-screw nut (6), and gear wheel
(39) it is engaged with pinion gear (36), the rotary motion of motor output shaft (33) is transmitted successively through pinion gear (36), gear wheel (39)
To ball-screw nut (6), ball-screw nut (6) rotation driving roller screw screw rod (5) tandem movement.
2. a kind of brake-by-wire device based on direct current generator power-assisted as described in claim 1, it is characterised in that：
The valve rod assembly is made of u shaped connector (1), valve rod (2), rubber sleeve (3) and valve rod return spring (4), valve rod (2)
Front end is connect with pedal-rod (17) rear end sphere-contact, and rear end and the u shaped connector (1) of valve rod (2) are connected, valve rod return spring
(4) it is sleeved on the front end outer side of valve rod (2), rubber sleeve (3) is coated on the outside of valve rod return spring (4).
3. a kind of brake-by-wire device based on direct current generator power-assisted as described in claim 1, it is characterised in that：
The braking cylinder component is by master cylinder push rod seat (22), master cylinder push rod (24), damping rubber block (23), main cylinder piston-rod
(25), master cylinder (26) and master cylinder push rod return spring (27) composition, master cylinder push rod seat (22) are mounted on valve body (18) front end,
Damping rubber block (23) is mounted between master cylinder push rod seat (22) bottom and pedal-rod (17), and master cylinder push rod (24) one end is in an axial direction
It is connected in master cylinder push rod seat (22) front end, master cylinder push rod (24) other end and the blind via bottom of main cylinder piston-rod (25) rear end face connect
Connection is touched, master cylinder push rod return spring (27) is sleeved on the outside of master cylinder push rod seat (22), master cylinder push rod return spring (27) one end
On the front end face for acting against valve body (18), the other end acts against on shell inner face, and the master cylinder (26) passes through ring flange
It is fixed on the outside of housing forward end.
4. a kind of brake-by-wire device based on direct current generator power-assisted as described in claim 1, it is characterised in that：
The shell is made of back casing (12) and procapsid (28), passes through position between the back casing (12) and procapsid (28)
Butt junction location is realized in two positioning pins (35) of diagonal position, and part is bolted and is assembled together, to ensure two shells
Relative position remains unchanged body at work；
Two translots are provided with to parallel and symmetrical on the inner surface of procapsid (28) along the longitudinal direction, valve block (16) sliding connects
It is connected in the translot.
5. a kind of brake-by-wire device based on direct current generator power-assisted as described in claim 1, it is characterised in that：
It is opened there are one through-hole at the center of valve block (16), the valve block (16) is mounted on the front side of ball-screw screw rod (5),
Valve block (16), which is coordinated by the through-hole at its center with the boss of ball-screw screw rod (5) front end, to be installed；
Through-hole both sides at valve block (16) center are symmetrically opened up there are two trapezoidal slot hole, the left side in clutch pedal mounting bracket (19) end face
Right both sides, are arranged with two trapezoidal side plates, and it is trapezoidal that two trapezoidal side plates of the clutch pedal mounting bracket (19) are vertically inserted in correspondence
In slot hole；
It is further opened with two arc short-bore on the outside of two trapezoidal slot holes of the valve block (16), the two of the valve body (18)
A arc otic placode is vertically mounted in corresponding arc short-bore；
End positions in valve block (16), are arranged with two rectangular shaped sliders, and the rectangular shaped slider is slidably connected at procapsid
(28) in the translot opened up in, valve block (16) is made to be slid back and forth along translot in procapsid (28).
6. a kind of brake-by-wire device based on direct current generator power-assisted as claimed in claim 5, it is characterised in that：
It opens there are one centre bore, the left and right sides in clutch pedal mounting bracket (19) end face, and hangs down at the center of the clutch pedal mounting bracket (19)
Directly in clutch pedal mounting bracket (19) end face, it is arranged with two trapezoidal side plates, the trapezoidal slot hole of the trapezoidal side plate and valve block (16)
Cooperation installation；
On each trapezoidal side plate, symmetrically open there are two L-type lockhole, the back-to-back setting symmetrical above and below of L-type lockhole, institute
It states L-type lockhole to match with locking plate (20), after pedal-rod (17) is installed in the centre bore of clutch pedal mounting bracket (19), by locking plate (20)
It assigns in L-type lockhole, pedal-rod (17) is radially locked in clutch pedal mounting bracket (19)；
Two rectangular shaped sliders are also arranged in the upper and lower side of clutch pedal mounting bracket (19), the rectangular shaped slider is slidably connected at valve body
(18) in the translot opened up in, clutch pedal mounting bracket (19) is made to be slid back and forth along translot in valve body (18).
7. a kind of brake-by-wire device based on direct current generator power-assisted as described in claim 5 or 6, it is characterised in that：
It is equipped with a round boss in the front end of valve body (18), is provided with interstitial hole at the center of round boss, the round boss is used
It is connected in the master cylinder push rod seat (22) of front side, the interstitial hole is for installing pedal-rod (17)；The valve body (18)
Rear end is set there are two symmetrical arc otic placode, and two arc otic placodes of the valve body (18) are vertically fixedly mounted on valve block (16)
Two arc short-bore in；
Two translots are provided with to parallel and symmetrical on the inner surface of valve body (18) along the longitudinal direction, clutch pedal mounting bracket (19) sliding connects
It is connected in the translot.
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| CN201710494798.3A CN107128295B (en) | 2017-06-26 | 2017-06-26 | A kind of brake-by-wire device based on direct current generator power-assisted |
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| CN201710494798.3A CN107128295B (en) | 2017-06-26 | 2017-06-26 | A kind of brake-by-wire device based on direct current generator power-assisted |
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| CN107128295B true CN107128295B (en) | 2018-09-28 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107128295B (en) * | 2017-06-26 | 2018-09-28 | 吉林大学 | A kind of brake-by-wire device based on direct current generator power-assisted |
| CN107757587A (en) * | 2017-10-10 | 2018-03-06 | 浙江力邦合信智能制动系统股份有限公司 | A kind of brake booster with backstop function |
| CN108105355A (en) * | 2017-12-20 | 2018-06-01 | 长安大学 | It is a kind of being capable of the ball-screw actuator that stretches of two level |
| CN108189824A (en) * | 2018-02-08 | 2018-06-22 | 吉林大学 | A kind of mixing line control brake system of front-wheel EHB trailing wheels EMB |
| CN109910856A (en) * | 2019-04-03 | 2019-06-21 | 吉林大学 | A kind of miniature electric passenger car electric-machine directly-driven brake-by-wire device and its brake control method |
| CN110686030B (en) * | 2019-10-19 | 2020-12-01 | 山东理工大学 | One-way two-stage boosting type electromechanical brake actuator based on linear motor |
| CN111301370A (en) * | 2019-12-13 | 2020-06-19 | 天津英创汇智汽车技术有限公司 | Electronic brake booster for automobile |
| CN111731255A (en) * | 2020-08-04 | 2020-10-02 | 吉林大学 | Motor power-assisted braking system with braking force calibration function and control method thereof |
| CN113071467B (en) * | 2021-05-12 | 2024-04-12 | 浙江大学台州研究院 | Decoupling type electric power-assisted braking device |
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| EP1598252A1 (en) * | 2004-05-17 | 2005-11-23 | Lucas Automotive GmbH | Electromechanic brake booster |
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| CN107128295A (en) * | 2017-06-26 | 2017-09-05 | 吉林大学 | A kind of brake-by-wire device based on direct current generator power-assisted |
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| JP2014046853A (en) * | 2012-08-31 | 2014-03-17 | Hitachi Automotive Systems Ltd | Electric booster |
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|---|---|---|---|---|
| EP1598252A1 (en) * | 2004-05-17 | 2005-11-23 | Lucas Automotive GmbH | Electromechanic brake booster |
| CN102205838A (en) * | 2010-11-04 | 2011-10-05 | 上海华普汽车有限公司 | Electric booster brake device for vehicle |
| CN106240552A (en) * | 2016-08-16 | 2016-12-21 | 上海汇众汽车制造有限公司 | Electric booster braking system |
| CN107128295A (en) * | 2017-06-26 | 2017-09-05 | 吉林大学 | A kind of brake-by-wire device based on direct current generator power-assisted |
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