CN206171439U

CN206171439U - Auto electric brakies main pump

Info

Publication number: CN206171439U
Application number: CN201621008013.4U
Authority: CN
Inventors: 毕大宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-31
Filing date: 2016-08-31
Publication date: 2017-05-17
Anticipated expiration: 2026-08-31

Abstract

Auto electric brakies main pump, its characterized in that: it comprises with the circuit board and push rod one -tenth the ball subassembly of casing, end cover, hollow inner rotor motor (stator, rotor), inner loop, brushless motor's the two magnetic ring boards of position sensor. Cavity rotor motor during operation drives inner loop formula ball subassembly and rotates, passes the push rod of a root zone circular bead in the middle of the screw rod, and the push rod is by installing the bush support at the screw rod both ends. The screw rod during operation can directly promote the circular bead to be made the push rod move along to promote the work of former car brake master cylinder. It can combine together with current some hydraulic braking systems, has constituteed novel electric liquid braking system. For the consideration of security, remain the structure that the main valve was brakied in the direct manipulation of foot brake pedal, can guarantee to remain certain brake force when electronic main pump became invalid.

Description

Motorcar electric brake main pump

Technical field

This utility model is related to a kind of Automobile Electro-hydraulic Brake System critical piece, and specifically a kind of is the automobile The supporting electrodynamic braking main pump of electro-hydraulic brake system.

Background technology

The brake fluid system for using on various vehicles at present is driven hydraulic pressure main pump, is driven 4 by vacuum booster The hydraulic brake wheel cylinder composition of individual wheel.Its principle is：Mainly promote former car master cylinder work using vacuum booster power-assisted Make, control full car hydraulic brake wheel cylinder braking action.But, due to many shortcomings of vacuum booster, for example：Sealing member grinds Damage causes power-assisted to weaken, the problem that the safety such as big, unfavorable to the automobile crash aspect that takes up space is present, therefore, cannot expire The use demand of sufficient active user.For especially for new-energy automobile, due to without engine driving vacuum pump, having to by peace Fill special electric vacuum pump vacuum is provided and ensure vacuum booster work, therefore so that the complex structure of vehicle, it is manufactured into This is high.To sum up, this traditional structure of vacuum booster is cancelled just into the task of top priority.

Utility model content

The purpose of this utility model is to provide a kind of motorcar electric brake main pump, is the main portion of automobile electro-hydraulic brake system Part.It can completely substitute existing vacuum booster and provide power-assisted for automobile brake, can safely solve existing automobile hydraulic The problem that brakes technology is present.

This utility model for achieving the above object, is achieved through the following technical solutions：It is by housing 4, end cap 16, hollow Inner rotor motor（Stator, rotor）, interior circulation ball-screw component 6, brushless electric machine the double and of magnet ring plate 13 of position sensor Wiring board 14 is constituted and push rod 20 is constituted.Internal-circulation type ball-screw component 6 is driven to rotate when motor with hollow rotor works, screw rod Centre passes through a push rod 20 with shoulder, push rod 20 to be supported by the bushing 27 installed in screw rod two ends.Screw rod can be with when working Pushing directly on shoulder makes the forward movement of push rod 20 promote former car master cylinder 1 to work.The rear end of push rod 20 is stepped on automotive electronics braking Plate is mechanically connected, and when electronic main pump fails, brake pedal can push directly on push rod 20 and push directly on former car master cylinder 1 again Work, makes brake fluid system possess certain brake force to ensure the safety of brakes.

In order to further realize the purpose of this utility model, technical scheme below is additionally used：Described electrodynamic braking master Pump mechanical part is by the position of main pump housing 4 and end cap 16, hollow type inner-rotor brushless motor, ball-screw component 6 and motor Put sensor group into.The former car master cylinder 1 of former car is arranged on main pump pump housing outlet side, and push rod 20 is arranged on hollow screw rod The inside.The push rod 20 is machined with a shoulder, and push rod shoulder can be promoted to move forward during screw action, during screw rod counteragent, push rod Screw rod is followed to return to origin-location under former car master cylinder valve rod spring effect.The opposite side of push rod is also a hemisphere, It is connected in joint with connecting rod 21.The other end of connecting rod is directly connected with brake pedal, can play mechanical braking effect.Increased Connecting rod 21, can swing with brake pedal, solve ± 3 ° that the push rod 20 when brake pedal works is likely to occur and swing by even Extension bar bears, and solves the interference that push rod 20 is likely to occur.The connecting rod 21 being directly connected to brake pedal uses six in input Angle thin nut 23 and the retaining washer 22 installed in screw thread shoulder clamp the small end of dirt-proof boot 19, and its big end is directly installed on end cap 16 Cannelure in and fixed with plastic tape, it is ensured that the normal work of dirt-proof boot 19.Connection fork has the screw thread can be with the thin spiral shell of hexagonal in 24 holes Parent phase is to fastening.It is described that to use hollow inner-rotor brushless motor must be permagnetic synchronous motor.By housing 4, end cap 16, The stator coil and magnet steel hollow rotor of hollow type inner-rotor brushless motor, the ball-screw component 6 of interior circulation and brushless electric machine Position sensor double magnet ring plates and wiring board composition.Hollow type inner-rotor brushless motor is the permanent-magnet synchronous of inner rotor core Motor, the coil of stator is fixed on inside outer ring housing 4, and the rotor 9 of magnet steel is fixed on the outside of nut overcoat 8, nut two ends by Big clutch shaft bearing (5) and second bearing (12) are supported on main pump housing 4 and end cap 16.The clutch shaft bearing (5) is big cone angle Ball bearing, the second bearing (12) is auger angle bearing, can bear larger axial force.

Built with ball-screw component, ball-screw component is mounted in hollow type electricity to described motorcar electric brake main pump In the middle of machine, its nut is fixed in a nut overcoat 8, and end has locking nut 3 and flat key and other structures to be fixed. Nut rotation will be driven during the working rotor.The screw rod of ball-screw component 6 is hollow, and pushing away with shoulder is installed in inside Bar 20, the head of the front end of push rod 20 is a hemisphere, is directly protruding on the ball seat in former car master cylinder respective aperture and promotes master Pump valve bar works, and by the hemisphere of push rod the former car master cylinder valve rod action of former car is pushed directly on, and makes former car master cylinder Work, promotes brake fluid respectively to four brake cylinders, directly plays braking action.

The opposite side of the push rod is also a hemisphere, is connected in joint with connecting rod 21.The other end of connecting rod is straight Connect and be connected with brake pedal, mechanical braking effect can be played.After connecting rod is contacted with hemisphere, will rivet tightly bulb on the outside of it, be formed One joint ball head.The connecting rod 21 being directly connected to brake pedal is in input hexagon thin nut 23 and installed in screw thread platform The retaining washer 22 of shoulder clamps the small end of dirt-proof boot 19, and the interior plastic tape of groove that its big end is directly installed on end cap is fixed, it is ensured that anti- Dirt covers 19 normal works.There is screw thread relative with hexagon thin nut can fasten in 24 holes of connection fork.

The other end of the connecting rod 21 is threadedly coupled and is fixed with hexagon thin nut with fork 23 is connected.Connection pitches 23 With brake pedal mechanical connection.When electronic main pump fails, brake pedal can push directly on push rod 20 and push directly on original again Car master cylinder works, and makes brake fluid system possess certain brake force, and this is to solve automobile electro-hydraulic brake system to solve peace The important measures of full property.Anti-dust seal 17 is housed between the inner side of end cap 16 and push rod 21.

The putting back-end of the present utility model is also hemisphere, is connected in joint with connecting rod.Connecting rod 21 is increased, Can swing with brake pedal, solve ± 3 ° of swings that the push rod 20 when brake pedal works is likely to occur and born by connecting rod, Solve the interference that push rod 20 is likely to occur.

Described is double magnet ring type sensors with the supporting position sensor of brushless electric machine, by double magnet ring plates 13 and wiring board 14 Composition；Can also be the position sensor of other structures, but must be hollow.Because centre is provided with push rod 20, they It is installed in rotor end.ECU measures the exact position residing for coil by the position sensor of motor.And the position passes Sensor is hollow double magnet ring type incremental encoders, and it is installed with hollow type inner-rotor brushless electric drilling match.The encoder Can be 3 pairs of poles, 4 pairs of poles or 5 pairs of poles, match with hollow type brushless electric machine in a word.Double magnet ring plates 13 are and rotor One is installed, wiring board can measure the fine angle signal of rotor to controller, and controller just can be worked with controlled motor.

Described motorcar electric main pump must be used cooperatively in electro-hydraulic brake system with electronic brake pedal, braking it is big Little and fast slow signal is provided by electronic brake pedal.These signals pass to controller and control forever after controller process The electric current of magnetic-synchro motor, so as to push control rod promotes the master cylinder work of former car.

The structure of described motorcar electric brake main pump Central Plains car master cylinder 1 and the hydraulic pressure of original brake fluid system Master cylinder is the same.

The utility model has the advantage of：What this utility model was recorded is a kind of new automobile electrodynamic braking Structure of RCP, It is to employ motor pushing mechanical actuating mechanism completely（Bolt and nut mechanism）The new automobile electrodynamic braking main pump of work.It New electro-hydraulic brake system can be constituted in combination with existing section hydraulic brakes.The new automobile electro-hydraulic Brakes is by controller（ECU）, electronic brake pedal, electrodynamic braking main pump, the brake cylinder of 4 former cars and hydraulic tube Road, wire harness composition.For the consideration of safety, we remain the structure of the direct brake activation main valve of foot brake pedal, can be with Ensure to retain certain brake force when electronic main pump fails.This utility model also has simple structure, cheap for manufacturing cost, fortune The advantages of row is stable, security performance is high.

The characteristics of this utility model, also resides in：

First, this utility model by housing 4, end cap 16, hollow type inner-rotor brushless motor, interior circulation ball-screw component 6th, the position sensor composition and push rod 20 of brushless electric machine is constituted.Employ hollow inner-rotor brushless motor and built-in ball Lead screw assembly constitutes the electro-mechanical parts of motorcar electric main pump.Internal-circulation type rolling is driven when hollow type inner-rotor brushless motor works Ballscrew component 6 is rotated, and a push rod 20 with shoulder is passed through in the middle of screw rod.Screw rod can push directly on shoulder and make to push away when working Bar 20 is moved forward, and promotes former car master cylinder work；The rear end of push rod 20 is mechanically connected with brake pedal, when the failure of electronic main pump When, brake pedal can push directly on push rod 20 and push directly on former car master cylinder work again, make Automotive electronic hydraulic braking system Blanket insurance has certain brake force to ensure the safety of brakes.The other end of push rod 20 be connected fork 24 threaded connection and It is relatively fixed with hexagon thin nut.Screw rod two ends inside supports push rod 20 equipped with two bushings.Connection pitches 24 Pedal machines connection.

2nd, this utility model uses the permagnetic synchronous motor that hollow type inner-rotor brushless motor is inner rotor core. By housing 4, end cap 16, hollow type inner-rotor brushless motor by magnet steel 9 rotor, coil stator and brushless electric machine position sensing Double magnet ring plates 13 of device and wiring board 14 are constituted.The coil of its stator is fixed on inside outer ring housing 4, and the rotor of magnet steel is fixed on The outside of nut overcoat 8.Nut rotation will be driven during the working rotor.The coil of hollow type inner-rotor brushless motor stator is fixed on Inside outer ring housing 4, the rotor of magnet steel is fixed on the outside of nut overcoat 8, and the two ends of nut overcoat 8 are by auger corner-kick bearing 5 and 12 It is supported on main pump housing 4 and end cap 16.

3rd, the screw rod of the ball-screw component 6 that this utility model is adopted is hollow, and pushing away with shoulder is installed in inside Bar 20, the head of the front end of push rod 20 is a hemisphere, is directly protruding on the ball seat in the respective aperture of hydraulic brake master 1 and promotes master Pump valve bar works, and by the hemisphere of push rod the braking main valve valve rod action of former car is pushed directly on, and makes the work of hydraulic brake master 1 Make, promote brake fluid respectively to 4 brake cylinders, directly play braking action.To ensure the normal work of dust cover 19, it is provided with solid The retaining washer 22 of the thread head of push rod 20 is scheduled on, it clamps dust cover small end and ensures the normal work of dust cover with hexagon thin nut 23 Make.Connection fork 24 is relative with hexagon thin nut 23 to tighten fixed position, can link with brake pedal.The other end of push rod 20 and company Connect the threaded connection of fork 24 and be relatively fixed with hexagon thin nut.What connection fork 23 was directly connected with the hole on brake pedal.Work as electricity When dynamic main pump fails, electronic brake pedal can push directly on push rod 20 and push directly on former car master cylinder 1 and work again, make the system Dynamic system possesses certain brake force.

4th, putting back-end of the present utility model is also hemisphere, is connected in joint with connecting rod.Connecting rod 21 is increased, Can swing with brake pedal, solve ± 3 ° of swings that the push rod 20 when brake pedal works is likely to occur and born by connecting rod, Solve the interference that push rod 20 is likely to occur.The other end of connecting rod is directly connected with brake pedal, can play mechanical braking effect. After connecting rod is contacted with hemisphere, will rivet tightly bulb on the outside of it, form a joint ball head.The company being directly connected to brake pedal Extension bar 21 clamps the small end of dirt-proof boot 19 in input hexagon thin nut 23 and installed in the retaining washer 22 of screw thread shoulder, and it is prevented The big end of dirt set 19 is directly installed on the interior plastic tape of groove of end cap and fixes, it is ensured that the normal work of dirt-proof boot 19.24 holes of connection fork Inside there is screw thread relative with hexagon thin nut can fasten.

5th, the ball-screw component that this utility model is adopted must be inner circulation structure, and otherwise size is too big, be difficult cloth Put.It is mounted in the middle of hollow type motor, its nut is fixed in a nut overcoat 5, and there are locking nut 7 and flat key in end 7 are fixed.

6th, the motor position sensor supporting with brushless electric machine that this utility model is adopted is double magnet ring type position sensings Device, is made up of double magnet ring plates 13 and wiring board 14；Can also be the position sensor of other structures, but must be it is hollow, Because centre is provided with push rod 20, they are installed in rotor end.ECU measures coil by the position sensor of motor Residing exact position.And the position sensor is hollow double magnet ring type incremental encoders, it be with hollow type internal rotor without The supporting installation of brush motor.Double magnet ring plates 13 are to install one with rotor, and wiring board can measure the fine angle letter of rotor Number controller is given, controller just can work with controlled motor.

7th, the structure that this utility model is adopted is rotation by being controlled the brushless electric machine by ECU, the rotation of brushless electric machine Drive push rod 20 to move, promote former car master cylinder axial movement, make the work of the former car master cylinder.Due to the electro-hydraulic brake System is furnished with brake pedal, and the pedal is equipped with angular transducer.When driver steps on the brake pedal, controller according to The braking maneuver of brake pedal, the change of angle of sampling out sensor angles, the size for analyzing brake force, the speed of braking, gives Go out to supply the size of current of brushless electric machine, change the output speed and moment of torsion of motor.The rotor for making the motor drives nut rotation So as to realize different brake requests.Controller 11 can be directly installed on electrodynamic braking main pump side, or independent peace Dress, it is connected with electrodynamic braking main pump wire.

8th, the brushless electric machine that this utility model is adopted must be permagnetic synchronous motor.Because its output waveform is sinusoidal Ripple, makes controller（ECU）It is easy to the work of precise control master cylinder.

Description of the drawings

Fig. 1 is the structural representation of motorcar electric main pump described in the utility model；Fig. 2 is that this utility model structure is adopted Double magnet ring position sensor structure charts, scheme the main view and sectional view of double magnet ring plates that a and b is position sensor, figure c and d positions The wiring board section view of sensor and front view.

Description of the drawings：The 1 former fixing bolt of car master cylinder 2, nut, the housing 5 of 3 locking nut of spring washer 4 The controller 12 of 10 stator of clutch shaft bearing 6 ball-screw component, 7 flat key, 8 nut overcoat, 9 hollow rotor 11 The fixing bolt of wiring board 15, nut, the spring pad of double position sensors of magnet ring plate 14 of the position sensor of two bearing 13 21 connecting rod of circle composition 16 end cap, 17 anti-dust seal, 18 stud, 19 dust cover, 20 push rod 22 fixes pad Enclose the bushing of 26 locating slot of connection 25 shoulder of fork of 23 hexagon thin nut 24 27.

Specific embodiment

Motorcar electric brake main pump described in the utility model, includes as shown in Figure 1 housing 4.Install former in the front end of housing 4 Car master cylinder 1, the rear mounting end lid 16 of housing 4.Existing motor with hollow rotor is installed in housing 4, possesses hollow rotor The motor of structure can be applicable in the main pump.Motor with hollow rotor is provided with the position of the detection anglec of rotation of hollow rotor 9 and passes Sensor, precisely to monitor the rotation situation of hollow rotor 9, and passes to control device by signal, by control device precise control The actual rotation status of idle running sub-motor.The position sensor is usually all kinds of existing encoders, hollow monitoring The rotational angle of rotor 9 is defined.Nut overcoat 8 is installed, one end of nut overcoat 8 leads in the hollow rotor 9 of motor with hollow rotor Cross that clutch shaft bearing 5 is connected with housing 4 and the other end of nut overcoat 8 is connected by second bearing 12 with end cap 16, nut overcoat 8 Can rotate relative to housing 4 with hollow rotor 9.Ball-screw component 6 is installed in nut overcoat 8.The nut of ball-screw component 6 with Nut overcoat 8 connects, and is generally connected the nut of ball-screw component 6 with nut overcoat 8 using flat key 7, enables nut overcoat 8 Drive the nut synchronous axial system of ball-screw component 6.The screw rod of ball-screw component 6 is provided with inner chamber, and interior intracavity is installed one and set There is the push rod 20 of shoulder 25, shoulder 25 coordinates with the front end of screw rod, screw rod can promote push rod 20 to move forward by shoulder 25, and And push rod 20 also can the screw rod of counter ball lead screw assembly 6 independently move forward, the front end of push rod 20 and former car master cylinder 1 are matched somebody with somebody Close to drive the action of former car master cylinder 1.The rear end of push rod 20 is stretched out outside end cap 16, can be mechanically connected with brake pedal, with same When also retains the function of the direct brake activation main valve of brake pedal.As shown in figure 1, the outfan rhabodoids head of push rod 20 adds Work is directly protruding on the ball seat in the former respective aperture of car master cylinder 1 into a hemisphere, promotes valve rod work, so as to drive fast Speed is stable.Motor with hollow rotor is also referred to as hollow shaft motor.The housing 4 and end cap 16 can be made into one, and its difficulty of processing is larger.

When installing and using, the rear end of push rod 20 and brake pedal are mechanically connected, by the pipeline of former car master cylinder 1 by existing The pipeline of some water brakes and the four of automobile brake cylinder UNICOMs, it is ensured that can drive four after the action of former car master cylinder 1 Brake cylinder action is realizing brake.In addition, setting angle sensor is monitoring the angle of brake pedal at brake pedal Degree change and pace of change.

During skidding, control motor with hollow rotor is rotated, and hollow rotor 9 drives push rod 20 by ball-screw component 6 To reach, push rod 20 pushes directly on master cylinder 1 and works, and master cylinder 1 controls existing wheel cylinder action and realizes brake.Brake knot Shu Hou, control motor with hollow rotor reversion resets, and moves after the screw rod of ball-screw component 6, now in master cylinder contained spring In the presence of master cylinder valve rod drive push rod 20 return to original position.The control principle of motor is：By position sensor Determine the exact position of rotor, be controlled so as to pass through rotations of the ECU to motor.ECU（Electronic Control Unit）For electronic control unit.The ingenious part of the motorcar electric brake main pump is：Ball-screw component 6 can be promoted Bar 20 moves ahead, and motor reversal can drive and moved after push rod 20 again, and when the main pump fails, user still can normally trample braking and step on Plate, and only push directly on push rod by manpower and promote former car master cylinder 1 to work, make brake fluid system possess a certain size system Power, prevents unexpected generation, ensures the safety of running car.

The motor with hollow rotor is hollow internal rotor permanent-magnetic synchronous motor, and its hollow rotor 9 is made up of magnet steel, stator 10 are provided with coil.Specifically, hollow internal rotor permanent-magnetic synchronous motor is hollow type inner-rotor brushless motor, and it is internal rotor The permagnetic synchronous motor of structure, stator coil is fixed on inside outer ring housing 4, and the rotor of magnet steel is fixed on the outside of nut overcoat 8.

The position sensor is made up of the double magnet ring plates 13 of position sensor and position sensor wiring board 14, position sensing The double magnet ring plates 13 of device are installed on one with hollow rotor 9, and position sensor wiring board 14 is installed on one with end cap 16, and position passes The double magnet ring plates 13 of sensor and position sensor wiring board 14 are hollow structures, and the rear end of push rod 20 is through the double magnetic of position sensor The middle part of ring flat-plate 13 and position sensor wiring board 14.

The position sensor is hollow double magnet ring type incremental encoders, and the double magnet ring plates 13 of position sensor are that increment is compiled Double magnet ring plates of code device, position sensor wiring board 14 is the wiring board of incremental encoder.Specifically, with the electric drilling match Position sensor use incremental encoder structure, double magnet ring type structures.It is made up of double magnet ring plates, wiring board；Also may be used To be other position sensor structures, they are integrally fixed with rotor, are believed with the rotation for obtaining hollow rotor 9 Breath.

The controller 11 of control motor with hollow rotor rotation is installed, controller also may be used according to consumers' opinions on the housing 4 With separately installed.

The rear end of the push rod 20 is connected by connector with brake pedal.

The connector is connected and composed by connecting rod 21 and connection fork 24, and the front end of connecting rod 21 is cut with scissors with the rear end of push rod 20 Connect, the rear end of connecting rod 21 connects with fork 24 is connected.The rear end of connecting rod 21 is connected by connection fork 24 with brake pedal.Increase Connecting rod 21, connecting rod 21 has been added to swing with brake pedal, ± 3 ° of pendulum that push rod 20 is likely to occur when brake pedal works It is dynamic to be born by connecting rod, solve the interference problem that push rod 20 is likely to occur, put forward the comfortableness of brake pedal, brake more and When.

As shown in figure 1, the connecting rod 21 and push rod 20 are hinged by spherical joint.Specifically, the rear end of push rod 20 Hemisphere is processed into, connecting rod 21 is provided with ball-and-socket, and the hemisphere of push rod 20 is connected with the ball-and-socket of connecting rod 21, connecting rod ball-and-socket Leading section rivets tightly hemisphere, makes close-connected joint.

Dust cover 19 is installed in the periphery of the connecting rod 21, and retaining washer 22 and hexagon thin nut are installed in connecting rod 21 23, retaining washer 22 and hexagon thin nut 23 clamp one end of dust cover 19, and dust cover 19 is connected with end cap 16.Such as Fig. 1 It is shown, it is to ensure the normal work of dust cover 19 specifically, it is provided with the retaining washer for being fixed on the rear threads end of push rod 20 22, it clamps dust cover small end and ensures dust cover normal work with hexagon thin nut 23.Connection fork 24 and the phase of hexagon thin nut 23 To tightening fixed position, dust cover 19 can be made to link with brake pedal.

The nut screw connection of locating slot 26, locating slot 26 and ball-screw component 6 is provided with the nut overcoat 8, outside nut 8 female threads connection locking nut 3 is covered, locking nut 3 is spacing for the nut of ball-screw component 6, i.e., ball-screw component 6 is peace It is mounted in the middle of hollow rotor 9, its nut is fixed in nut overcoat 8, is fixed by locking nut 3 and flat key 7.

Controller can be directly installed on electrodynamic braking main pump side, or independently installed, with electrodynamic braking master Pump wire connects.Can ensure that connecting wire is most short installed in electrodynamic braking main pump side, independently installed electrodynamic braking main pump Connecting wire is longer.Controller is to acquire the angular transducer angle signal on automobile electronic brake pedal, needed for analyzing The size and speed speed of brake force, supplies induced current, it is ensured that braking effect to brushless electric machine as required.

The technical solution of the utility model is not restricted in the range of embodiment described in the utility model.This practicality is new The technology contents of the not detailed description of type are known technology.

Claims

1. motorcar electric brake main pump, it is characterised in that：Including housing (4), former car master cylinder is installed in the front end of housing (4) (1) motor with hollow rotor is installed, motor with hollow rotor is provided with detection in, the rear mounting end lid (16) of housing (4), housing (4) The position sensor of hollow rotor (9) anglec of rotation, installs nut overcoat (8), spiral shell in the hollow rotor (9) of motor with hollow rotor The two ends of female overcoat (8) are connected respectively by clutch shaft bearing (5) and second bearing (12) with housing (4) and end cap (16), nut Overcoat (8) can rotate with hollow rotor (9) relative to housing (4), and ball-screw component (6), ball wire are installed in nut overcoat (8) The nut of thick stick component (6) is connected with nut overcoat (8), and the screw rod of ball-screw component (6) is provided with inner chamber, and interior intracavity installs one The push rod (20) of shoulder (25) is provided with, shoulder (25) coordinates with the front end of screw rod, and screw rod can promote push rod by shoulder (25) (20) move forward, the front end of push rod (20) coordinates to drive the action of former car master cylinder (1) with former car master cylinder (1), pushes away End cap (16) is stretched out outward in the rear end of bar (20), and screw rod two ends inside supports push rod (20) equipped with two bushings.

2. motorcar electric brake main pump according to claim 1, it is characterised in that：The motor with hollow rotor is hollow Internal rotor permanent-magnetic synchronous motor, its hollow rotor (9) is made up of magnet steel, and stator (10) is made up of coil.

3. motorcar electric brake main pump according to claim 1, it is characterised in that：The position sensor is by position sensing Double magnet ring plates (13) of device and wiring board (14) composition of position sensor, double magnet rings plate (13) of position sensor and hollow rotor (9) one is installed on, position sensor wiring board (14) is installed on one, double magnet rings plate (13) of position sensor with end cap (16) Be hollow structure with position sensor wiring board (14), the rear end of push rod (20) through double magnet rings plate (13) of position sensor and The middle part of position sensor wiring board (14)；Ball-screw component must be inner circulation structure, and it is mounted in hollow type motor Middle.

4. motorcar electric brake main pump according to claim 3, it is characterised in that：The position sensor is hollow double Magnet ring type incremental encoder, double magnet ring plate (13) of position sensor is double magnet ring plates of incremental encoder, position sensor circuit Plate (14) is the wiring board of incremental encoder.

5. motorcar electric brake main pump according to claim 1, it is characterised in that：Install in control on the housing (4) The controller (11) of idle running sub-motor work, or according to actual installation needs, controller can also be separately installed.

6. motorcar electric brake main pump according to claim 1, it is characterised in that：The rear end of the push rod (20) is by connecting Fitting is connected with brake pedal.

7. motorcar electric brake main pump according to claim 6, it is characterised in that：The connector by connecting rod (21) and Connection fork (24) is connected and composed, and front end and the rear end of push rod (20) of connecting rod (21) are hinged, the rear end of connecting rod (21) and company Connect fork (24) connection.

8. motorcar electric brake main pump according to claim 7, it is characterised in that：The connecting rod (21) and push rod (20) It is hinged by spherical joint.

9. motorcar electric brake main pump according to claim 7, it is characterised in that：Install the periphery of the connecting rod (21) Dust cover (19), installs retaining washer (22) and hexagon thin nut (23) in connecting rod (21), retaining washer (22) and hexagonal are thin One end of nut (23) clamping dust cover (19), dust cover (19) is connected with end cap (16).

10. motorcar electric brake main pump according to claim 1, it is characterised in that：It is provided with fixed in the nut overcoat (8) Position groove (26), locating slot (26) is engaged with the locating slot on the nut of ball-screw component (6), has one special to put down during installation Key (7) is mounted in the location hole on nut overcoat (8) location hole and nut；Nut overcoat (8) female thread installation locking nut (3), locking nut (3) for ball-screw component (6) nut axial limiting.