CN209600478U - Electric booster braking device with one-way clutch - Google Patents
Electric booster braking device with one-way clutch Download PDFInfo
- Publication number
- CN209600478U CN209600478U CN201920091251.3U CN201920091251U CN209600478U CN 209600478 U CN209600478 U CN 209600478U CN 201920091251 U CN201920091251 U CN 201920091251U CN 209600478 U CN209600478 U CN 209600478U
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- China
- Prior art keywords
- way clutch
- rack gear
- shell
- braking device
- electric booster
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Abstract
The electric booster braking device with one-way clutch of the utility model, including shell, rack gear has been slidably connected in shell, one end of rack gear, which contradicts, push rod, the other end of rack gear is equipped with piston rod, piston rod is equipped with master cylinder far from the side of rack gear, and return spring is equipped between rack gear and master cylinder, and rack gear is equipped with manpower backup brake apparatus far from the side of piston rod；Rotation connection sprocket drive spindle in shell, one-way clutch is coaxially arranged on gear shaft, the inner ring of one-way clutch is arranged on gear shaft, gear shaft is engaged with rack, the outer ring of one-way clutch is equipped with turbine, the centre bore of turbine and the outer ring interference fit joint of one-way clutch, shell are equipped with electric booster braking device.The pedal force input of the reduction driver of driver is reduced when manpower backup braking, so that light to the manipulation of brake pedal, smooth during continuing power-assisted.
Description
Technical field
The utility model relates to automobile brake technical fields, and in particular to the electric booster braking dress with one-way clutch
It sets.
Background technique
Hydraulic braking system for automobile mostly uses greatly vacuum servo at present, and if vacuum booster fails, driver needs very big
Power can just step on brake pedal.
A kind of " the Electro-hydraulic brake system with electrodynamic braking assist function " of Publication No. CN105523028A, is adopted
Vacuum booster in transmission braking system is replaced with electronic power-assisted braking arrangement, electric boosted, active brake and mistake may be implemented
Brake-by-wire needed for effect manpower backup brakes and supports Brake energy recovery.People is carried out under the system motor power-assisted failure state
When dynamic braking, push rod pushes rack gear and master cylinder to generate backup brake pressure when driver's brake pedal, meets and fails
Requirement of shelter.
But the system also needs to overcome turbine and worm secondary and the resistance and inertia force of motor movement when manpower is backed up and braked
Square adds somewhat to the braking of automobile so that master cylinder pressure output is reduced in the case of certain brake pedal force
Distance, so as to influence brake safe.
Publication number CN106740791A discloses a kind of electrical servo brake apparatus of electric car, in pedal shaft position
Servo motor and one-way clutch are installed.When no servo motor is braked, driver can be driven by one-way clutch manpower
Dynamic pedal brake；But when needing servo motor auxiliary braking, servo motor need to overcome pedal rotary resistance, spring-compressed elastic force etc.
Resistance, the above-mentioned drag reduction braking moment of servo motor, is equivalent to the braking distance for increasing automobile, equally reduces vapour
The braking safety of vehicle traveling.
Summary of the invention
For overcome the deficiencies in the prior art, the utility model proposes the electric booster braking device with one-way clutch,
Its pedal force input that driver is reduced when manpower is backed up and braked, so that light to the manipulation of brake pedal during continuing power-assisted
Just, smoothly.
To achieve the goals above, the electric booster braking device with one-way clutch of the utility model, including shell,
Rack gear is slidably connected in shell, one end of rack gear, which contradicts, push rod, and the other end of rack gear is equipped with piston rod, and piston rod is far from tooth
The side of item is equipped with master cylinder, and return spring is equipped between rack gear and master cylinder, and rack gear is equipped with far from the side of piston rod
Manpower backup brake apparatus；Rotation couples sprocket drive spindle in shell, is coaxially arranged with one-way clutch, one-way clutch on gear shaft
The inner ring of device is arranged on gear shaft, and gear shaft is engaged with rack, and the outer ring of one-way clutch is equipped with turbine, the centre bore of turbine
With the outer ring interference fit joint of one-way clutch, shell is equipped with electric booster braking device.
Further, manpower backup brake apparatus includes pedal, and annular groove is provided on pedal, is provided with bolt on push rod,
Bolt is interspersed in annular groove, and push rod is opposite to be slidably arranged on shell, and taper spring is equipped between push rod and shell, is divided in shell
It is not provided with pedal displacement sensor and rack displacement sensor.
Further, electric booster braking device includes the motor for being fixed by screws in hull outside, motor coaxle connection
It is connected to worm screw, worm screw engages with the outer ring of turbine.
Further, be provided with the shaft shoulder on gear shaft, one-way clutch is arranged between the shaft shoulder and first bearing, the shaft shoulder and
Spacer is equipped between first bearing, spacer and the shaft shoulder are contradicted respectively in the two sides of one-way clutch.
Further, first bearing and second bearing are provided in shell, first bearing and second bearing are set in tooth
The outside of wheel shaft, first bearing and second bearing are respectively sleeved at the two sides of gear shaft.
Further, ball-and-socket is provided on rack gear, the end of push rod is provided with bulb, bulb and ball-and-socket clearance fit.
Further, the cross sectional shape of taper spring is isosceles trapezoid.
Further, the side of rack gear towards piston rod couples with piston rod thread, and thread connection has compression on piston rod
Nut, the outer sheath of piston rod are equipped with STATEMENT OF FEDERALLY SPONSORED, and in the housing, clamp nut is supported with STATEMENT OF FEDERALLY SPONSORED for the setting of the opposite sliding of STATEMENT OF FEDERALLY SPONSORED
Touching cooperation.
Further, one-way clutch and gear shaft interference fit joint.
Further, rack gear includes bar portion and teeth portion, and the cross sectional shape of bar portion is arch.
The utility model has the advantages that manpower backup brake apparatus drives piston rod directly to brake to master cylinder when manpower backup braking,
Rack gear is during sliding since the effect of one-way clutch is without driving the rotation of electric power power-assisted braking arrangement；Electric power power-assisted system
When dynamic device rotation, due to the one-way of one-way clutch, electric power power-assisted braking arrangement band carry-over bar acts on master cylinder, by
It is mutually contradicted in push rod and rack gear and avoids electric power power assisting device and drive pedal rotation, to reach the safety for increasing braking
The effect of property.
Detailed description of the invention
With reference to the accompanying drawing the utility model is made further to describe and illustrate.
Fig. 1 is the structural schematic diagram of the present embodiment entirety；
Fig. 2 is the cross-sectional view in Fig. 1 at E-E '；
Fig. 3 is the enlarged drawing in Fig. 1 at A.
Appended drawing reference: 1, shell；2, rack gear；21, bar portion；22, teeth portion；3, push rod；4, piston rod；5, master cylinder；6,
Return spring；7, manpower backup brake apparatus；71, pedal；72, annular groove；73, bolt；74, taper spring；75, pedal displacement passes
Sensor；76, rack displacement sensor；8, gear shaft；9, one-way clutch；10, electric booster braking device；101, motor；
102, worm screw；11, first bearing；12, second bearing；13, the shaft shoulder；14, spacer；15, ball-and-socket；16, bulb；17, clamp nut；
18, STATEMENT OF FEDERALLY SPONSORED；19, turbine.
Specific embodiment
Below in conjunction with attached drawing, by the description to preferred embodiments of the present invention, more clearly and completely explain
State the technical solution of the utility model.
Embodiment: as shown in Figure 1, the electric booster braking device with one-way clutch, is used for motorcar electric brake field,
Its effect has at 2 points, first, driver when manpower is backed up and braked, reduces the excess loss that the brake force of driver generates；Its
Two, when electric booster braking, reduce the excess loss that electric boosted brake force generates.
As shown in Figure 1, the electric booster braking device with one-way clutch includes shell 1, it has been slidably connected in shell 1
Rack gear 2, rack gear 2 include bowed bar portion 21 and the teeth portion 22 coupled with bar portion 21, and bar portion 21 is slided in shell 1, identical
Under volume, bowed bar portion 21 reduces the contact area of rack gear 2 Yu shell 1, reduces the resistance to sliding of rack gear 2.Rack gear 2
Left end is equipped with push rod 3, push rod 3 and 2 clearance fit of rack gear, is provided with ball-and-socket 15 on rack gear 2, the side of push rod 3 towards rack gear 2 is set
It is equipped with bulb 16, the left side of push rod 3 is equipped with manpower backup brake apparatus 7, and the right side thread connection of rack gear 2 has piston rod 4, piston
The right side of bar 4 is equipped with master cylinder 5.The manpower backup brake apparatus 7 includes pedal 71, and pedal 71 is rotatably connected on automobile,
It is provided with annular groove 72 on the surface of pedal 71, bolt 73 is provided on push rod 3, bolt 73 is interspersed in annular groove 72.Driver's
Pedal force passes to push rod 3 by pedal 71, and pedal force is acted on master cylinder 5 by piston rod 4 by rack gear 2 by push rod 3
On, master cylinder 5, which generates brake force, makes automobile brake.Pedal displacement sensor 75 and rack displacement are respectively arranged in shell 1
Sensor 76, according to the displacement of the displacement of pedal displacement sensor 75 and rack displacement sensor 76 as master cylinder 5
The input quantity of movement avoids master cylinder 5 from generating malfunction.
As depicted in figs. 1 and 2, rotation connection sprocket drive spindle 8, gear shaft 8 are located at the downside of rack gear 2, gear shaft in shell 1
8 engage with rack gear 2 and mutually link.The both ends of gear shaft 8 are in shell 1, and the both ends of gear shaft 8 are arranged with respectively
One bearing 11 and second bearing 12, first bearing 11 and second bearing 12 and the inner wall of shell 1 are fixed, first bearing 11 and second
Bearing 12 can reduce the frictional force of the rotation of gear shaft 8, be coaxially provided with turbine 19, turbine 19 and gear in the outside of gear shaft 8
Axis 8 links, and is equipped with electric booster braking device 10 in the outside of shell 1, which includes motor 101, electricity
Machine 101 uses servo motor 101, and motor 101 is fixed by screws on the outside of shell 1, coaxial in the shaft of motor 101
It is provided with worm screw 102, worm screw 102 engages with turbine 19 and linked.Electric booster braking device 10 in electric power power brake,
Motor 101 is rotated by turbine 19 and worm screw 102 with movable gear shaft 8, and gear shaft 8 drives piston rod 4 to make to brake by rack gear 2
Master cylinder 5 generates brake force.Due to not coupling between rack gear 2 and push rod 3, when motor 101 is moved to right with carry-over bar 2, pedal 71
And the resistance of push rod 3 will not influence the torque of motor 101, thus braking of the electric booster braking device 10 to master cylinder 5
Power will not be influenced by pedal 71 and push rod 3, ensure that the braking safety of electric booster braking device 10.
As depicted in figs. 1 and 2, when electric booster braking device 10 fails, driver can deposit the pedal force of pedal 71
The case where acting electric booster braking device 10 by rack gear 2, the brake drag of driver will be increased in this way, extended
Braking distance and reduce braking safety.In order to avoid this situation, therefore one-way clutch is coaxially arranged on gear shaft 8
9, the inner ring of one-way clutch 9 is connected on gear shaft 8 by way of interference fit, and the centre bore of aforementioned turbine 19 passed through
The mode of cooperation of being full of couples with the outer ring of one-way clutch 9, and the purpose of interference fit is, avoids that connection is arranged on gear shaft 8
Structure reduces the additional rotary resistance of gear shaft 8 come the case where coupling one-way clutch 9 and turbine 19 respectively.
As depicted in figs. 1 and 2, when 7 independent brake of manpower backup brake apparatus, the pedal force of driver makes 8 turns of gear shaft
Dynamic, gear shaft 8 drives the inner ring of one-way clutch 9 relative to outer ring rotating, and electric booster braking device 10 is not with gear shaft 8
It rotates and acts, therefore when manpower backup braking independent brake, electric booster braking device 10 will not influence the practical system of vehicle
Dynamic distance；When electric booster braking, due to the one-way of one-way clutch 9, motor 101 drives one-way clutch by worm screw 102
The outer ring rotating of device 9, the outer ring of one-way clutch 9 drive the inner ring linkage of one-way clutch 9, and the inner ring of one-way clutch 9 is logical
Crossing gear shaft 8 drives master cylinder 5 to brake, and cooperates since rack gear 2 and push rod 3 contradict, the movement of rack gear 2 not will drive push rod 3 with
And pedal 71 links, push rod 3 and pedal 71 will not influence the brake force of electric booster braking device 10.It is set on gear shaft 8
It is equipped with the shaft shoulder 13, one-way clutch 9 is arranged between the shaft shoulder 13 and first bearing 11, sets between the shaft shoulder 13 and first bearing 11
There is spacer 14, spacer 14 and the shaft shoulder 13 are contradicted respectively in the two sides of one-way clutch 9, position of the spacer 14 to one-way clutch 9
It compresses and one-way clutch 9 is limited.
As shown in figures 1 and 3, it is required to reset after manpower backup braking or after electric booster braking, therefore in push rod 3
Be equipped with taper spring 74 between the outer wall of shell 1, the cross sectional shape of taper spring 74 is isosceles trapezoid, taper spring 74 it is small
The peripheral wall of circle face and push rod 3 contradicts, and the great circle face of taper spring 74 and the outer wall of shell 1 contradict, and the stress of taper spring 74 becomes
Changing is in non-linear growth, i.e., when 74 decrement equivalent of taper spring changes, the pedal force of driver is in non-linear growth.In addition,
Return spring 6 is equipped between the outer wall of push rod 3 and master cylinder 5, return spring 6 is set in the outside of push rod 3, in rack gear
2 are equipped with STATEMENT OF FEDERALLY SPONSORED 18 towards the side of master cylinder 5, and STATEMENT OF FEDERALLY SPONSORED 18 is set in the outside of piston rod 4, on the peripheral wall of piston rod 4
Thread connection has clamp nut 17, and clamp nut 17 is contradicted and compressed with piston rod 4, one end of return spring 6 and STATEMENT OF FEDERALLY SPONSORED 18
It contradicts, the other end of return spring 6 contradicts on the outer surface of master cylinder 5, and return spring 6 and taper spring 74 are used
Automatically reseting after manpower backup braking or after electric booster braking.
Above-mentioned specific embodiment is only described preferred embodiments of the present invention, and not practical to this
Novel protection scope is defined.Under the premise of not departing from the utility model design conception and scope, this field
Those of ordinary skill is according to verbal description provided by the utility model, attached drawing to made by the technical solution of the utility model
Various modifications, substitution and improvement should belong to the protection category of the utility model.The protection scope of the utility model is wanted by right
Ask determining.
Claims (10)
1. the electric booster braking device with one-way clutch, including shell (1), which is characterized in that sliding in the shell (1)
Connection has rack gear (2), and one end of the rack gear (2), which contradicts, to be had push rod (3), and the other end of the rack gear (2) is equipped with piston rod
(4), the piston rod (4) is equipped with master cylinder (5) far from the side of rack gear (2), the rack gear (2) and master cylinder (5) it
Between be equipped with return spring (6), the rack gear (2) far from piston rod (4) side be equipped with manpower backup brake apparatus (7)；It is described
Rotation couples sprocket drive spindle (8) in shell (1), is coaxially arranged with one-way clutch (9) on the gear shaft (8), described unidirectional
The inner ring of clutch (9) is arranged on gear shaft (8), and the gear shaft (8) is engaged with rack gear (2), the one-way clutch (9)
Outer ring be equipped with turbine (19), the outer ring interference fit joint of the centre bore of the turbine (19) and one-way clutch (9), the shell
(1) electric booster braking device (10) are equipped with.
2. the electric booster braking device according to claim 1 with one-way clutch, which is characterized in that the manpower is standby
Part brake apparatus (7) includes pedal (71), is provided with annular groove (72), is provided on the push rod (3) slotting on the pedal (71)
It sells (73), the bolt (73) is interspersed in annular groove (72), and the push rod (3) is opposite to be slidably arranged on shell (1), described to push away
Taper spring (74) are equipped between bar (3) and shell (1), are respectively arranged with pedal displacement sensor (75) in the shell (1)
With rack displacement sensor (76).
3. the electric booster braking device according to claim 2 with one-way clutch, which is characterized in that described electronic to help
Power-absorption unit (10) includes the motor (101) being fixed by screws on the outside of shell (1), and the motor (101) coaxially couples
Have worm screw (102), the worm screw (102) is engaged with the outer ring of turbine (19).
4. the electric booster braking device according to claim 3 with one-way clutch, which is characterized in that the shell
(1) first bearing (11) and second bearing (12) are provided in, the first bearing (11) and second bearing (12) are set in
The outside of gear shaft (8), the first bearing (11) and second bearing (12) are respectively sleeved at the two sides of gear shaft (8).
5. the electric booster braking device according to claim 4 with one-way clutch, which is characterized in that the gear shaft
(8) it is provided on the shaft shoulder (13), the one-way clutch (9) is arranged between the shaft shoulder (13) and first bearing (11), the axis
Spacer (14) are equipped between shoulder (13) and first bearing (11), the spacer (14) and the shaft shoulder (13) are contradicted respectively in one-way clutch
The two sides of device (9).
6. the electric booster braking device according to claim 2 with one-way clutch, which is characterized in that the rack gear
(2) it is provided on ball-and-socket (15), the end of the push rod (3) is provided with bulb (16), between the bulb (16) and ball-and-socket (15)
Gap cooperation.
7. the electric booster braking device according to claim 2 with one-way clutch, which is characterized in that the circular cone bullet
The cross sectional shape of spring (74) is isosceles trapezoid.
8. the electric booster braking device according to claim 1 with one-way clutch, which is characterized in that the rack gear
(2) towards the side of piston rod (4) and piston rod (4) thread connection, thread connection has clamp nut on the piston rod (4)
(17), the outer sheath of the piston rod (4) is equipped with STATEMENT OF FEDERALLY SPONSORED (18), and the setting of the opposite sliding of the STATEMENT OF FEDERALLY SPONSORED (18) is in shell
(1) in, the clamp nut (17) and STATEMENT OF FEDERALLY SPONSORED (18) contradict and cooperate.
9. the electric booster braking device according to claim 1 with one-way clutch, which is characterized in that it is described unidirectionally from
Clutch (9) and gear shaft (8) interference fit joint.
10. the electric booster braking device according to claim 1 with one-way clutch, which is characterized in that the rack gear
It (2) include bar portion (21) and teeth portion (22), the cross sectional shape of the bar portion (21) is arch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920091251.3U CN209600478U (en) | 2019-01-21 | 2019-01-21 | Electric booster braking device with one-way clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920091251.3U CN209600478U (en) | 2019-01-21 | 2019-01-21 | Electric booster braking device with one-way clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209600478U true CN209600478U (en) | 2019-11-08 |
Family
ID=68399868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920091251.3U Active CN209600478U (en) | 2019-01-21 | 2019-01-21 | Electric booster braking device with one-way clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209600478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109720325A (en) * | 2019-01-21 | 2019-05-07 | 南京经纬达汽车科技有限公司 | Electric booster braking device with one-way clutch |
-
2019
- 2019-01-21 CN CN201920091251.3U patent/CN209600478U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109720325A (en) * | 2019-01-21 | 2019-05-07 | 南京经纬达汽车科技有限公司 | Electric booster braking device with one-way clutch |
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