CN207208043U - A kind of brake booster with backstop function - Google Patents
A kind of brake booster with backstop function Download PDFInfo
- Publication number
- CN207208043U CN207208043U CN201721295545.5U CN201721295545U CN207208043U CN 207208043 U CN207208043 U CN 207208043U CN 201721295545 U CN201721295545 U CN 201721295545U CN 207208043 U CN207208043 U CN 207208043U
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- CN
- China
- Prior art keywords
- screw rod
- nut
- brake
- baffle plate
- stop block
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of brake booster with backstop function, including the push rod for being braked pedal-driven and moving axially forward, for exporting the power-assisted output precision of brake boost, drive the motor of power-assisted output precision and the master cylinder of output brake force, it is characterized in that, the power-assisted output precision includes the screw rod and nut of threaded connection, the push rod is passed through from pitch and is connected with screw drive, the nut is connected by transmission component and motor, the nut front end face is provided with the stop block of protrusion, the screw front end is provided with the baffle plate corresponding with stop block, when vehicle carries out brake boost, motor driven nut rotation, screw rod moves forward, master cylinder is driven to export brake force；When abandoning braking, push rod loses the thrust of brake pedal, screw rod to retract it is dynamic drive baffle plate to retract, until baffle plate encounters stop block, prevent nut rotation, ensure that screw rod will not retract the position that oversteps the extreme limit, and improve security.
Description
Technical field
A kind of brake booster is the utility model is related to, more particularly to a kind of brake booster with backstop function.
Background technology
In the prior art, the operation of vehicle generally requires power assisting device, for example, vehicle is by compressed air, hydraulic oil etc.
The relevant apparatus of booster operating and controlling vehicle, light purpose is used to reach.The development of Hyundai Motor brake is originating from original
Machine control unit, the control for brake of most original is that one group of simple mechanical device of pilot control applies to brake and made
Firmly, vehicle weight is smaller at that time, and speed ratio is relatively low, and mechanical braking has been able to the needs for meeting automobile brake, but with
The increase of automobile own wt, power assisting device is more and more important for brake, and braking is installed in limited space
Booster, it is necessary to the volume of brake booster is controlled, still, brake booster of the prior art, especially in power-assisted output group
The design structure of part part is complicated, and transmission efficiency is low, and easily occurs do not have protection device when screw rod return back to extreme position,
So as to cause product failure.
Utility model content
The purpose of this utility model is to provide a kind of compact-sized, transmission efficiency and has rollback backstop function
Brake booster.
In order to solve above-mentioned purpose, the technical solution adopted in the utility model is：A kind of braking with backstop function helps
Power device, including be braked pedal-driven and move axially forward push rod, the power-assisted output precision for exporting brake boost,
Drive the motor of power-assisted output precision and the master cylinder of output brake force, it is characterised in that the power-assisted output precision includes
The screw rod and nut of threaded connection, the push rod are passed through from pitch and are connected with screw drive, and the nut passes through transmission
Component is connected with motor, and the nut front end face is provided with the stop block of protrusion, and the screw front end is provided with and stop block phase
Corresponding baffle plate, the nut rotation drives screw rod to move forward and backward, described to stop when the screw rod is retracted to extreme position backward
Baffle plate contacts with stop block prevents nut from being rotated further.
The baffle plate both ends are connected with guide pillar, and the guide pillar be arranged in parallel with screw rod so that drive of the baffle plate in screw rod
It can be moved forward or rearward under dynamic along guide pillar, improve the stability of baffle plate.
The nut is connected with stop block by spline so that stop block can be driven to rotate while nut rotation.
The screw rod is provided with the rotation preventing device for preventing that screw rod from rotating so that screw rod can only move forward or backward along screw thread
It is dynamic, rotation can not be carried out, prevents screw rod from rotation occurs and causes transmission failure.
The beneficial effects of the utility model are：When vehicle carries out brake boost, motor driven nut rotation, nut rotation band
Dynamic screw rod moves forward, and drives master cylinder to export brake force；When abandoning braking, push rod loses the thrust of brake pedal, screw rod
To retracting, dynamic drive baffle plate retracts, until baffle plate encounters stop block, prevents nut rotation, screw rod stops rollback, ensures spiral shell
Bar will not retract the position that oversteps the extreme limit, and improve security.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is the utility model section view.
Embodiment
Referring to the drawings, a kind of brake booster with backstop function, including fixed seat 8, be braked pedal-driven and edge
Push rod 1 moved axially forward, the power-assisted output precision for exporting brake boost, drive the motor of power-assisted output precision and defeated
Go out the master cylinder of brake force, the power-assisted output precision includes the screw rod 2 and nut 3 of threaded connection, and the push rod 1 is from screw rod
2 centers pass through and are connected with screw rod 2, while push rod 1 moves axially forward screw rod 2 can be driven to move together, described
Nut 3 is connected by transmission component and motor, and in the present embodiment, the transmission component includes travelling gear 4 and centre
Gear 9, the idler gear 9 are connected with the spline of nut 3, and the travelling gear 4 is connected with the flat key of idler gear 9, electric motor starting,
While driving nut 3 counterclockwise by travelling gear 4 and idler gear 9 or rotate clockwise, screw rod 2 then along screw thread to
It is preceding or be moved rearwards, what the position that nut 3 rotates was fixed, being merely able to rotation can not be moved forward or rearward.
The idler gear 9 is arranged in fixed seat 8 by spring bearing 10 so that idler gear, which rotates, can drive spiral shell
Mother rotates.
The front end face of nut 3 is provided with the stop block 5 of protrusion, and the stop block can follow nut to turn in situ together
Dynamic, the front end of screw rod 2 is provided with the baffle plate 6 corresponding with stop block, and the baffle plate can follow screw rod to move forward and backward,
In the present embodiment, the both ends of baffle plate 6 are connected with a guide pillar 7 respectively, and two guide pillars 7 be arranged in parallel with screw rod 2, institute
State guide pillar to be fixed in fixed seat, what the baffle plate 6 can more be stablized along guide pillar 7 follows screw rod 2 movable, prevents
Baffle plate swings.The stop block 5 is located at the rear side of baffle plate 6, meeting remote stop block 5 when the baffle plate 6 moves forward,
When screw rod 2 retracts to extreme position backward, the baffle plate 6 is contacted with stop block 5, and baffle plate 6 is blocked with nut rotation
Stop block 5, prevent nut 3 be rotated further, that is, prevent screw rod 2 retract it is excessive.
The nut 3 is connected with stop block 5 by spline so that stop block can follow nut to rotate in situ together.
The screw rod is provided with the rotation preventing device for preventing that screw rod from rotating（It is not drawn into figure）, the rotation preventing device can wale spiral shell
Bar so that screw rod can only be moved forward or rearward along screw thread, can not be carried out rotation, be prevented rotation from causing transmission failure.
Operation principle：Brake pedal applies the thrust moved forward to push rod 1, and push rod 1 moves forward, displacement transducer inspection
Push rod movement is surveyed, mobile signal is then passed into ECU, ECU controlled motors start, and motor driving travelling gear 4 rotates, and passes
Moving gear 4 drives nut 3 to rotate, and screw rod 2 moves forward along screw thread, and the final brake piston for promoting master cylinder, braking is lived
Plug, which moves forward, carries out a series of decelerations, braking maneuver；During keeping braking, motor stops motor pinion rotation,
So that motor gear is lived surely, the elastic force due to back-moving spring is prevented so that screw rod, which is fallen back, causes brake fade；When abandoning braking, push away
Bar 1 loses the thrust of brake pedal, and back-moving spring drives screw rod 2 to reset, and brake piston also and then resets, and is return back in screw rod 2
During extreme position, stop block 5 can contact with baffle plate 6, so as to ensure to retract not over extreme position.
Claims (4)
1. a kind of brake booster with backstop function, including be braked pedal-driven and move axially forward push rod,
For exporting the power-assisted output precision of brake boost, the motor of driving power-assisted output precision and the master cylinder for exporting brake force,
Characterized in that, the power-assisted output precision include threaded connection screw rod and nut, the push rod passed through from pitch and
It is connected with screw drive, the nut is connected by transmission component and motor, and the nut front end face is provided with stopping for protrusion
Block, the screw front end are provided with the baffle plate corresponding with stop block, and the nut rotation drives screw rod to move forward and backward, described
When screw rod is retracted to extreme position backward, the baffle plate contacts with stop block prevents nut from being rotated further.
A kind of 2. brake booster with backstop function according to claim 1, it is characterised in that the baffle plate two
End is connected with guide pillar, and the guide pillar be arranged in parallel with screw rod.
3. a kind of brake booster with backstop function according to claim 1, it is characterised in that the nut is with stopping
Block is connected by spline.
4. a kind of brake booster with backstop function according to claim 1, it is characterised in that set on the screw rod
There is the rotation preventing device for preventing that screw rod from rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721295545.5U CN207208043U (en) | 2017-10-10 | 2017-10-10 | A kind of brake booster with backstop function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721295545.5U CN207208043U (en) | 2017-10-10 | 2017-10-10 | A kind of brake booster with backstop function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207208043U true CN207208043U (en) | 2018-04-10 |
Family
ID=61820586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721295545.5U Active CN207208043U (en) | 2017-10-10 | 2017-10-10 | A kind of brake booster with backstop function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207208043U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2017
- 2017-10-10 CN CN201721295545.5U patent/CN207208043U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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