CN209700628U - A kind of brake booster - Google Patents
A kind of brake booster Download PDFInfo
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- CN209700628U CN209700628U CN201920422702.7U CN201920422702U CN209700628U CN 209700628 U CN209700628 U CN 209700628U CN 201920422702 U CN201920422702 U CN 201920422702U CN 209700628 U CN209700628 U CN 209700628U
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- master cylinder
- screw rod
- brake pedal
- piston
- connector
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Abstract
The utility model provides a kind of brake booster, including master cylinder, brake pedal, load device, electric driver, back-up device and brake pedal motion detection apparatus, the brake pedal is sequentially connected by back-up device and master cylinder piston, the brake pedal is by overcoming the power of load device to be moved, it is characterized in that, there are gaps between the electric driver and master cylinder piston, be not powered on or off-position under, the brake pedal pushes directly on master cylinder piston movement by back-up device, since the idle stroke of brake pedal input lever is not present, ensure the deceleration that can achieve legal requirement within the scope of the low power of pedal travel simulator, under energized state, the electric driver work pushes master cylinder piston mobile after eliminating gap, the idle stroke of brake pedal input lever is caused to be opened, in normal brake application, it can It is to be established using this section of idle stroke hydraulic, retrogradation braking is carried out to use the motor of vehicle.
Description
Technical field
The utility model relates to brake of battery truck field, in particular to a kind of brake booster.
Background technique
With the continuous development of new-energy automobile, the demand to VMT Vehicle-Miles of Travel is extended is increasing, therefore, extends row
Sail mileage a key factor be slow down during energy regenerating, braking system should be able to using motor rather than friction system
It moves to be braked.
Braking system is the basis of vehicle safety, it is therefore desirable to implement multiple backup mechanisms.One of backup mechanism is
Mechanical device, driver can be braked by purely mechanic mode.This causes brake pressure to generate and brake pedal movement
Coupling, this requirement with energy regenerating is on the contrary, the requirement of energy regenerating is should to apply the braking torque of motor rather than make
Dynamic pressure.
In the prior art, CN107672577A discloses a kind of Electric booster structure, wherein the push rod of brake pedal
Separation is formed between the mandril connecting with master cylinder, but have the disadvantage that the case where being not powered on or powering off
Under, driver will also overcome the spring force of simulation pedal sense other than overcoming required pressure, therefore simulate pedal sense
Spring characteristic limit decoupling gap.In addition, having used the master cylinder of small diameter to reduce piston force, this makes tightly
Braking system reaction is slow under anxious brake condition.Finally, in case of a system failure, since decoupling gap increases pedal row
Journey, this may interfere with driver, cause pedal thrust insufficient.
CN106004826A discloses a kind of master cylinder arrangement, push rod of the master cylinder arrangement in master cylinder mandril and brake pedal
Between have Separation, by remove simulation pedal sense spring so that driver do not have to overcome additional spring force, still
Compared with legacy system, it is excessive that the shortcomings that utility model, is that pedal sense changes.
CN207631211U discloses a kind of line control brake system, wherein in the case where energy regenerating, brake pedal
Pressure by solenoid valve realize decoupling generate, will not influence vehicle safety in thrashing.It can be with by solenoid valve
It is switched between non-decoupling and decoupling according to system mode.However, the quantity of required component makes the structure very expensive
And complicated, a possibility that increasing failure.
Utility model content
In view of the deficiencies of the prior art, the purpose of this utility model is to provide a kind of adjustable decoupling-structure of band and for reality
The brake booster of existing energy regenerating.
To achieve the above object, the utility model provides a kind of brake booster, including master cylinder, brake pedal, load
Device, electric driver, back-up device and brake pedal motion detection apparatus, the brake pedal pass through back-up device and master
The cylinder piston transmission connection, the brake pedal is by overcoming the power of load device to be moved, which is characterized in that the electric drive
There are gap between device and master cylinder piston, be not powered on or off-position under, the brake pedal is directly pushed away by back-up device
Dynamic master cylinder piston is mobile, and under energized state, the electric driver work pushes master cylinder piston mobile after eliminating gap.
The electric driver includes motor, gear set, nut and screw rod, and the nut is connect with screw rod screw rod, described
Motor is rotated by gear set drive nut, can be in axial sliding connection between the nut and gear set, and the gap is present in
Between screw rod and master cylinder piston.
The back-up device includes solid connector, and the master cylinder piston is sequentially connected by solid connector and nut,
Opposite between the screw rod and solid connector to be slidably connected, the gap is present between screw rod and master cylinder piston, is not powered on
Or under off-position, the screw rod is pushed by the input lever of brake pedal, and the screw rod drives nut to move forward, the nut
Push master cylinder piston by solid connector, under energized state, the motor driven nut rotation, screw rod moves forward eliminate between
Gap.
The back-up device includes length-adjustable connecting rod, and the connecting rod is connect with screw rod, and the gap is present in
Between connecting rod and master cylinder piston, the connecting rod is connected by self-locking transmission mechanism with additional motor, and the connecting rod is by volume
Outer motor driven self-locking transmission mechanism adjusts its length.
The self-locking transmission mechanism includes the combination of self-locking screw rod and gear or the combination of self-locking screw rod and self-locking worm gear,
Or the combination of hydraulic fluid and hydraulic pump.
The back-up device includes solid ratchet connector, and the solid ratchet connector rear end passes through elastic component and input
Bar connection, the solid ratchet connector front end head on master cylinder piston, and the solid ratchet connector sliding is set to pitch,
The gap is present between solid ratchet connector front end and screw front end, and the solid ratchet connector and screw rod are by removable
Dynamic ratchet lock pin locking, the mobile ratchet lock pin are mobile by electric linear actuator driven.
The electric linear actuator is the combination of linear motor or electromagnetic coil or lead screw and motor.
The load device includes that brake pedal connector, mobile load component, slinky spring and hard spring, the braking are stepped on
Plate connector and input lever are sequentially connected, and the slinky spring is set between brake pedal and mobile load component, the hard spring
Between mobile load component and shell.
The detection device includes for detecting the mobile position sensor of input lever.
The detection device includes the sensing element for detecting brake pedal movement.
The utility model provides a gap between electric driver and master cylinder piston, while being ensured by back-up device
Brake pedal input lever is connected with master cylinder piston, without the idle stroke of brake pedal input lever, compared with prior art,
The utility model has the advantage that
One, in the case where being not powered on or powering off, the braking distance that driver steps on corresponds to the deceleration under same distance,
It can not focus on to avoid driver because of failure；
Two, in the case where being not powered on or powering off, driver only needs to overcome the power of the slinky spring of simulation pedal sense, in this way
Master cylinder diameter can be increased in design to obtain better performance；
Three, in order to realize brake-by-wire function, mechanically decoupled gap is only opened in system energization and fault-free；
Four, the unlatching in mechanically decoupled gap is completed by booster motor and relevant transmission parts, is not necessarily to other component, from
And reduce costs, reduce complexity.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is one structural schematic diagram of the utility model embodiment；
Fig. 3 is two structural schematic diagram of the utility model embodiment；
Fig. 4 is three structural schematic diagram of the utility model embodiment.
In figure, 10 master cylinders, 13 shells, 20 brake pedals, 30 load devices, 31 mobile load components, 32 hard springs, 33 is soft
Spring, 50 electric drivers, 51 motors, 52 gear sets, 55 nuts, 56 screw rods, 57 input levers, 58 brake pedal connectors, 60
Back-up device, 61 solid connectors, 62 return springs, 63 connecting rods, 64 self-locking transmission mechanisms, 65 additional motors, 66 mobile spine
Wheel lock pin, 67 electric linear actuators, 68 elastic components, 69 solid ratchet connectors, 70 detection devices, 71 position sensors, 72
Sensing element, 80 gaps.
Specific embodiment
As shown in Figure 1, a kind of brake booster, including master cylinder 10, brake pedal 20, load device 30, electric driver
50, back-up device 60 and brake pedal motion detection apparatus 70, the brake pedal 20 pass through back-up device 60 and master cylinder 10
Piston drive connection, the brake pedal 20 by overcoming the power of load device 30 to be moved, the electric driver 50 with
There are gap 80 between 10 piston of master cylinder, be not powered on or off-position under, the brake pedal 20 is direct by back-up device 60
Push 10 piston of master cylinder mobile, under energized state, gap 10 piston of promotion master cylinder after 80s is eliminated in the work of electric driver 50
It is mobile.
As shown in Fig. 2, embodiment one: master cylinder 10 has first piston 11 and second piston 12, and electric driver 50 includes
Motor 51, the gear set 52 connecting with motor drive, nut 55 and screw rod 56, the nut 55 are connect with 56 screw rod of screw rod, institute
It states motor 51 and drives nut 55 to rotate by gear set 52, can be in axial sliding connection between the nut 55 and gear set 52,
That is can be connected by spline between gear set 52 and nut 55.
The back-up device 60 is solid connector 61, the first piston 11 of the master cylinder 10 by solid connector 61 with
Nut 55 is sequentially connected, and opposite between the screw rod 56 and solid connector 61 to be slidably connected, the gap 80 is present in screw rod
Between 56 and the first piston 11 of master cylinder, the nut 55 keeps certain by the first piston 11 of return spring 62 and master cylinder
Distance.
In the present embodiment, the load device 30 includes brake pedal connector 58, mobile load component 31, slinky spring
33 and hard spring 32, the input lever 57 of the screw rod 56 and brake pedal be directly connected to, the input lever 57 passes through brake pedal
Connector 58 is connect with brake pedal 20, and the slinky spring 33 is set between brake pedal 20 and mobile load component 31, described
Hard spring 32 is set between mobile load component 31 and shell 13, and the mobile load component movement is limited by shell, together
When limit input lever movement.With the movement of mobile load component, hard spring is compressed.
In the present embodiment, the detection device 70 includes for detecting the mobile position sensor 71 of input lever 57, institute
Position sensor 71 is stated on shell 13.The detection device 70 further includes the sensing element for detecting the movement of brake pedal 20
Part 72, the sensing element 72 are set in input lever 57.
Working principle: under energized state, motor rotation driven gear group rotation, gear set drive nut rotation, screw rod to
Preceding movement pushes master cylinder piston mobile to slowly eliminate in gap, and the idle stroke of brake pedal input lever is opened；It is not powered on or breaks
Under electricity condition, the idle stroke of brake pedal input lever is eliminated, and brake pedal input lever pushes directly on nut and screw rod together forward
It is mobile, and then solid connector is driven to move forward, it is final to push master cylinder piston mobile.
Be not powered on or off-position under, it is mobile that the brake pedal by back-up device pushes directly on master cylinder piston, due to
The idle stroke of brake pedal input lever is not present, it is ensured that can achieve law within the scope of the low power of pedal travel simulator and wants
The deceleration asked；Under energized state, the electric driver work pushes master cylinder piston mobile after eliminating gap, and braking is caused to be stepped on
The idle stroke of plate input lever is opened, and in normal brake application, it is hydraulic to avoid establishing to can use this section of idle stroke, to use
The motor of vehicle carries out retrogradation braking.Once the idle stroke of brake pedal input lever is opened, by being connected to brake pedal
The spring of input lever provides pedal sense appropriate.
By the opening of the idle stroke of brake pedal input lever, mechanical mechanism is decoupled, which ensure that generated braking
The size of pressure is not limited by brake pedal position, so as to form line control brake system.
As shown in figure 3, embodiment two is the same as example 1, the difference is that back-up device 60 is length-adjustable connecting rod
63, the gap 80 is present between connecting rod 63 and the first piston 11 of master cylinder, and the connecting rod 63 is connect with screw rod 56, institute
It states connecting rod 63 to connect by self-locking transmission mechanism 64 and additional motor 65, the connecting rod 63 is driven self-locking by additional motor 65
Transmission mechanism 64 adjusts its length.In the present embodiment, the self-locking transmission mechanism 64 can be using self-locking screw rod and gear
Combination or the combination of self-locking screw rod and self-locking worm gear or the combination of hydraulic fluid and hydraulic pump.
Working principle: in the case where being not powered on or powering off, the length longest of connecting rod, so that connecting rod directly heads on master
The first piston of cylinder, input lever forward movement will push screw rod, nut moves forward, and then the first piston of master cylinder is pushed to move
It is dynamic；In the case where energization, connecting rod shorten to it is most short, screw rod moved forward under the driving of the motor of electric driver drive connect
Extension bar is mobile to the first piston of master cylinder until eliminating the gap.
As shown in figure 4, embodiment three is the same as example 1, the difference is that back-up device 60 is solid ratchet connector
69, solid 69 rear end of ratchet connector is connect by elastic component 68 with input lever 57, before the solid ratchet connector 69
End heads on the first piston 11 of master cylinder, and the solid sliding of ratchet connector 69 is set to 56 center of screw rod, and the gap 80 exists
Between solid 69 front end of ratchet connector and 56 front end of screw rod, that is, before being present in the first piston 11 and screw rod 56 of master cylinder
Between end, the solid ratchet connector 69 and screw rod 56 are locked by removable ratchet lock pin 66, the mobile ratchet lock pin 66
It is driven and is moved by electric linear actuator 67, the mobile ratchet lock pin 66 is arranged on screw rod 56, together with screw rod 56
Movement.In the present embodiment, the electric linear actuator 67 can be using line motor or electromagnetic coil or lead screw and electricity
The combination of machine.
Working principle: in the case where being not powered on or powering off, mobile ratchet lock pin locks solid ratchet connector and screw rod,
It connect input lever directly with the first piston of master cylinder by screw rod, input lever moves forward the first piston for pushing directly on master cylinder
It is mobile；In the case where energization, the mobile ratchet lock pin of electric linear actuator driven leaves solid ratchet connector and screw rod, so that
Screw rod can opposing solid ratchet connector sliding, screw rod is moved forward under the driving of the motor of electric driver until elimination
The gap.
Claims (10)
1. a kind of brake booster, including it is master cylinder (10), brake pedal (20), load device (30), electric driver (50), standby
Part device (60) and brake pedal motion detection apparatus (70), the brake pedal (20) pass through back-up device (60) and master cylinder
(10) piston drive connects, and the brake pedal (20) is by overcoming the power of load device (30) to be moved, which is characterized in that
There are gap (80) between the electric driver (50) and master cylinder (10) piston, be not powered on or off-position under, the braking
Pedal (20) pushes directly on master cylinder (10) piston by back-up device (60) and moves, under energized state, the electric driver
(50) work eliminates gap (80) and pushes the movement of master cylinder (10) piston afterwards.
2. a kind of brake booster according to claim 1, which is characterized in that the electric driver (50) includes motor
(51), gear set (52), nut (55) and screw rod (56), the nut (55) connect with screw rod (56) screw rod, the motor
(51) nut (55) rotation is driven by gear set (52), it can the company of sliding axially between the nut (55) and gear set (52)
It connects, the gap (80) is present between screw rod (56) and master cylinder (10) piston.
3. a kind of brake booster according to claim 2, which is characterized in that the back-up device (60) includes solid company
Fitting (61), master cylinder (10) piston are sequentially connected by solid connector (61) and nut (55), the screw rod (56) with
Opposite between solid connector (61) to be slidably connected, the gap (80) is present between screw rod (56) and master cylinder (10) piston,
Be not powered on or off-position under, the screw rod (56) by brake pedal (20) input lever (57) push, screw rod (56) band
Dynamic nut (55) move forward, and the nut (55) pushes master cylinder (10) piston by solid connector (61), under energized state,
Motor (51) driving nut (55) rotation, screw rod (56), which moves forward, eliminates gap (80).
4. a kind of brake booster according to claim 2, which is characterized in that the back-up device (60) includes that length can
The connecting rod (63) of tune, the connecting rod (63) connect with screw rod (56), and the gap (80) is present in connecting rod (63) and master
Between cylinder (10) piston, the connecting rod (63) is connected by self-locking transmission mechanism (64) and additional motor (65), the connection
Bar (63) adjusts its length by additional motor (65) driving self-locking transmission mechanism (64).
5. a kind of brake booster according to claim 4, which is characterized in that the self-locking transmission mechanism (64) includes certainly
Lock the combination of screw rod and gear or the combination of self-locking screw rod and self-locking worm gear or the combination of hydraulic fluid and hydraulic pump.
6. a kind of brake booster according to claim 2, which is characterized in that the back-up device (60) includes solid spine
It takes turns connector (69), solid ratchet connector (69) rear end is connect by elastic component (68) with input lever (57), the reality
Heart ratchet connector (69) front end heads on master cylinder (10) piston, and solid ratchet connector (69) sliding is set in screw rod (56)
The heart, the gap (80) are present between solid ratchet connector (69) front end and screw rod (56) front end, and the solid ratchet connects
Fitting (69) and screw rod (56) are locked by removable ratchet lock pin (66), and the mobile ratchet lock pin (66) is held by electric linear
Row device (67) driving movement.
7. a kind of brake booster according to claim 6, which is characterized in that the electric linear actuator (67) is straight line
The combination of motor or electromagnetic coil or lead screw and motor.
8. a kind of brake booster according to claim 1, which is characterized in that the load device (30) includes that braking is stepped on
Plate connector (58), mobile load component (31), slinky spring (33) and hard spring (32), the brake pedal connector (58) and
Input lever (57) transmission connection, the slinky spring (33) is set between brake pedal (20) and mobile load component (31), described
Hard spring (32) is set between mobile load component (31) and shell (13).
9. a kind of brake booster according to claim 1, which is characterized in that the detection device (70) includes for examining
Survey input lever (57) mobile position sensor (71).
10. a kind of brake booster according to claim 1, which is characterized in that the detection device (70) includes being used for
Detect the sensing element (72) of brake pedal (20) movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920422702.7U CN209700628U (en) | 2019-03-31 | 2019-03-31 | A kind of brake booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920422702.7U CN209700628U (en) | 2019-03-31 | 2019-03-31 | A kind of brake booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209700628U true CN209700628U (en) | 2019-11-29 |
Family
ID=68646252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920422702.7U Active CN209700628U (en) | 2019-03-31 | 2019-03-31 | A kind of brake booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209700628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109878475A (en) * | 2019-03-31 | 2019-06-14 | 浙江力邦合信智能制动系统股份有限公司 | A kind of brake booster |
-
2019
- 2019-03-31 CN CN201920422702.7U patent/CN209700628U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109878475A (en) * | 2019-03-31 | 2019-06-14 | 浙江力邦合信智能制动系统股份有限公司 | A kind of brake booster |
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