CN211592537U - Rigid feedback device for servo force of automobile electronic intelligent booster - Google Patents

Abstract

The utility model relates to a rigidity feedback device of servo power of automotive electronics intelligence booster belongs to car braking field. The valve comprises a valve body and a retainer ring, wherein a rigid arm is arranged in the valve body and is supported by a conical spring to keep horizontal and static, the conical spring is arranged on a valve body seat, a main cylinder push rod is guided by the retainer ring, and a main cylinder push rod seat is embedded into a groove of the valve body and is pressed on the rigid arm through an elastic retainer ring. The servo.

Description

Rigid feedback device for servo force of automobile electronic intelligent booster

Technical Field

The utility model relates to a feedback device for car braking field, especially improvement of automotive electronics intelligence booster.

Background

An electronic intelligent booster used in a brake system amplifies an input force applied to a brake pedal by a motor. The operating device for the pressure buildup of a motor vehicle brake master cylinder comprises a front shell and a rear shell which are arranged between the brake master cylinder and a brake pedal, rigid feedback devices of servo force for the pressure buildup of the brake master cylinder, an electric motor, a guide device and a transmission device, and the torsion motion of the electric motor is converted into the translation motion of a piston by the above mechanisms.

When the existing electronic booster works, the input force on the pedal is transmitted to a piston of a brake master cylinder through a valve rod and a valve body part and a rubber feedback disc. As shown in fig. 8, the rubber feedback disc is made of an elastomer material, the valve body component acts on the inner ring of the feedback disc to deform the feedback disc, so that a displacement difference value occurs between the valve body component and the displacement sensor, the sensor sends a detected displacement difference signal to the vehicle electronic control unit, the control unit calculates a torque requirement required to be generated by the motor, and the torque requirement is converted into a servo force by the transmission and the longitudinal transmission device, so that the valve body moves forwards along the axial direction, the servo force acts on the outer ring of the feedback disc until the pressure intensities of the inner ring and the outer ring of the feedback disc are equal and no deformation occurs, the displacement difference value between the displacement sensor and the valve body component is zero, the motor stops rotating to reach a balanced state, and the motor continues to work until the push rod force is input again to. The rubber feedback disc is acted by three forces in the working process, wherein the first acting force is that a person steps on a brake pedal and acts on the inner ring of the rubber feedback disc through the input force of a valve rod; the second acting force is the servo force provided by the source motor and acts on the outer ring of the rubber feedback disc through the valve body; the third acting force is the reaction force transmitted back by the hydraulic brake pipeline through the push rod of the main cylinder.

However, when the electronic booster works, the rubber feedback disc can be subjected to a large acting force, the rubber feedback disc is extremely damaged particularly when high-temperature frequent braking is performed, the service life of the rubber feedback disc is prolonged if the contact part of the rubber feedback disc and the valve body part is seriously damaged, the braking effect of the booster is influenced, and the braking force is reduced. Since the hardness of a rubber material is related to both tensile strength and elasticity, the hardness is proportional to the tensile strength and inversely proportional to the elasticity. The rubber feedback disc not only needs to have good elasticity, but also needs to have high tensile strength, wherein the elasticity is mainly expressed in good feedback characteristics, and the high tensile strength is expressed in high service performance and service life. After long-term use, rubber can be aged, the feedback effect is reduced, and the servo assistance effect is influenced.

Disclosure of Invention

The utility model provides a rigidity feedback device of automobile electron intelligence booster servo force makes it show the response characteristic who improves electronic booster, improves the reliability of system under different operating condition, improves system life.

The utility model adopts the technical proposal that: the bottom of the valve body is used as a first limiting surface, the upper surface of the retainer is used as a second limiting surface and is surrounded by the inner surface of the valve body as a third limiting surface, the first rigid arm and the second rigid arm are positioned and mounted by virtue of the first groove and the second groove of the valve body, and the first fillet position at the bottom of the first groove is used as a yielding structure when the first rigid arm rotates; the second rigid arm is positioned and installed by means of a second groove, a round angle position II at the bottom of the second groove is used as a yielding structure when the second rigid arm rotates, the first rigid arm and the second rigid arm are supported by a conical spring to keep horizontal and static, the conical spring is installed on a valve body seat, a main cylinder push rod is guided by a retainer ring, and a small-diameter end penetrates through a central hole of the main cylinder push rod seat and penetrates through a central hole formed by the first rigid arm and the second rigid arm; the main cylinder push rod seat is embedded into the four grooves of the valve body and is pressed on the first rigid arm and the second rigid arm through elastic check rings, and the elastic check rings are in compression joint with the lower parts of the first jaw, the second jaw, the third jaw and the fourth jaw which are distributed on the valve body at 90 degrees.

The rigidity feedback device of servo force has the symmetry characteristic, through two symmetrical constant head tank restriction rigidity arm one and two radial and rotational degrees of freedom of rigidity arm of valve body upper groove one and recess for arrange to have the symmetry characteristic, the effect of power has the symmetry equally.

Recess one, recess two of valve body all have T type recess characteristic, perpendicular to longitudinal section M1, and recess one and recess two all about longitudinal section M1 bilateral symmetry, two recess one simultaneously and recess two about longitudinal section M3 symmetry, coincide with the boss one and the boss two phase of rigidity arm one and rigidity arm two respectively, and bottom fillet position one and fillet position two provide the space of stepping down for the rigidity arm is rotatory simultaneously.

First space, the second of stepping down of master cylinder push rod seat space, the third space and the fourth space of stepping down use longitudinal axis K to become 90 degrees angles and evenly arrange as the center, the purpose is for four jack catchs on the assembly process smoothly through the valve body and design the space of stepping down and lighten weight, the central hole position is that master cylinder push rod path end passes through the headspace and lightens weight.

Big footpath end of conical spring support rigid arm one and rigid arm two, lower extreme path end is located on the spring holder, the spring holder is located on the retaining ring, last retaining ring is impressed the ring channel inner wall of valve body seat, keep conical spring, spring holder and retaining ring and valve body seat to move together and support the rigid arm return.

The utility model has the advantages of novel structure provides the rigidity feedback device of servo force, can install on existing intelligent electronic booster, can show the response characteristic who improves electronic booster, improves the reliability of system under different operating condition, improves system life.

Drawings

Fig. 1 is a three-dimensional cross-sectional view of the present invention in a resting state;

fig. 2 is a two-dimensional cross-sectional view of the working state of the present invention;

FIG. 3 is a longitudinal installation cross-sectional view of the assembly of the present invention;

FIG. 4 is a perspective view of the master cylinder push rod base of the present invention;

fig. 5 is a three-dimensional view of a first rigid arm and a second rigid arm of the present invention;

fig. 6 is a longitudinal sectional view of the valve body of the present invention;

FIG. 7 is a three-dimensional view of the valve body, the main cylinder push rod seat and the retainer ring of the present invention during the assembly process;

FIG. 8 is a force diagram of a rubber reaction disk.

Detailed Description

The bottom of the valve body 1 is used as a first limiting surface, the upper surface of the retainer 9 is used as a second limiting surface, the upper surface of the retainer and the inner surface of the valve body 1 are used as third limiting surfaces to enclose, the rigid arm I5 and the rigid arm II 6 are positioned and installed through the groove I1 a and the groove II 1b of the valve body 1, and the fillet position I1 c at the bottom of the groove I1 a is used as a yielding structure when the rigid arm I5 rotates; the second rigid arm 6 is positioned and installed by means of the second groove 1b, a fillet position two 1d at the bottom of the second groove 1b serves as a yielding structure when the second rigid arm 6 rotates, the first rigid arm 5 and the second rigid arm 6 are supported and kept horizontally static by the conical spring 2, the conical spring 2 is installed on the valve body seat 4, the main cylinder push rod 10 is guided by the retainer ring 9, and the small-diameter end 10a penetrates through a central hole 7c of the main cylinder push rod seat 7 and penetrates through a central hole e formed by the first rigid arm 5 and the second rigid arm 6 in a surrounding mode; the main cylinder push rod seat 7 is embedded into four grooves of the valve body 1 and is pressed on the first rigid arm 5 and the second rigid arm 6 through elastic check rings 8, and the elastic check rings 8 are in compression joint with the lower parts of the first jaw 1e, the second jaw 1f, the third jaw 1g and the fourth jaw 1h which are distributed on the valve body 1 at 90 degrees so as to prevent the main cylinder push rod seat 7 from moving;

the rigid feedback device of the servo force has a symmetrical characteristic, and the radial and rotational freedom degrees of the first rigid arm 5 and the second rigid arm 6 are limited by two symmetrical positioning grooves of the first groove 1a and the second groove 1b on the valve body 1, so that the arrangement has a symmetrical characteristic, and the action of the force has symmetry;

the first groove 1a and the second groove 1b of the valve body 1 are both provided with T-shaped groove characteristics and are perpendicular to the longitudinal section M1, the first groove 1a and the second groove 1b are both symmetrical about the longitudinal section M1, the first groove 1a and the second groove 1b are symmetrical about the longitudinal section M3 and are respectively matched with the first boss 5a and the second boss 6a of the first rigid arm 5 and the second rigid arm 6, and meanwhile, the first fillet position 1c and the second fillet position 1d at the bottom provide yielding space for rotation of the rigid arms;

the first abdicating space 7b, the second abdicating space 7c, the third abdicating space 7d and the fourth abdicating space 7f of the main cylinder push rod seat 7 are uniformly arranged at an angle of 90 degrees by taking a longitudinal axis K as a center, aiming at designing abdicating spaces and reducing weight by smoothly passing through four claws on the valve body 1 in the assembling process, and the central hole position 7c is used for reducing weight by passing through a reserved space by a small-diameter end 10a of a main cylinder push rod;

the large-diameter end of the conical spring 2 supports the first rigid arm 5 and the second rigid arm 6, the small-diameter end of the lower end of the conical spring is located on the spring seat 11, the spring seat 11 is located on the check ring 3, and finally the check ring 3 is pressed into the inner wall of the annular groove 4b of the valve body seat 4 to keep the conical spring 2, the spring seat 11 and the check ring 3 and the valve body seat 4 to move together to support the rigid arms to return.

The following describes the present invention with reference to the accompanying drawings and working principle.

Referring to fig. 1, the device is mainly used as a bearing element by a valve body 1, a first rigid arm 5 and a second rigid arm 6 are respectively arranged in a first groove 1a and a second groove 1b of the valve body 1 and are longitudinally supported by a valve body seat 4, a retainer ring 3, a spring seat 11 and a conical spring 2, the cylindrical end of the valve body seat 4 is in interference fit with the retainer ring 3 through a central hole of the valve body 1, and a flexible retainer ring 8 is pressed below a boss of the valve body 1 to press a main cylinder push rod seat 7, the first rigid arm 5 and the second rigid arm 6 on the conical spring 2 to limit the axial freedom degree.

When the valve body seat 4 is forced to move forwards, the servo force provided by the motor is transmitted to the valve body 1 through the speed change mechanism and the supporting device 13, and acts on a point 5b of the rigid arm and the direction is upward, the rigid arm 5 is reversely pressed by the master cylinder push rod seat 7 relative to the valve body 1 under the reaction force of master cylinder hydraulic pressure, the acting point is a point a, the rigid arm is inclined towards the valve body seat 4 and is in contact with the valve body seat 4, at the moment, the acting length from an input acting point c to the supporting point a is L2, the acting length from the servo acting point b to the supporting point a is L1, the boosting ratio is L2/L1, and meanwhile, the rigid arm two 6 at the symmetrical position exerts the same action and acts on a point 6b of the rigid arm and the direction is upward; when the moment generated by the servo force is smaller than the moment generated by the input force on the valve body seat 4, the motor continuously provides the servo force feedback device to stop acting, and when the moment generated by the servo force is larger than the moment generated by the valve body seat 4, the valve body seat 4 is pushed back to the initial position of the relative displacement sensor, and the motor stops rotating; when the pedal input force is withdrawn, the valve body seat 4 is disengaged from the first rigid arm 5 and the second rigid arm 6 under the action of the conical spring, and the feedback device is not in use.

See fig. 3, the utility model discloses install the central point at assembly 1 and put, can move along the central axis K, the front end is compressed tightly the location by return spring 12, and the rear end is installed on strutting arrangement 13.

Referring to fig. 4, a first position 7b, a second position 7d, a third position 7e and a fourth position 7f of the main cylinder push rod seat 7 are uniformly arranged at an angle of 90 degrees relative to a longitudinal central axis K, the 4 positions are arc-shaped to prevent interference with a jaw 1e, a jaw 1f, a jaw 1g and a jaw 1h on the inner wall of the valve body 1 during assembly, and a first boss 7-1, a second boss 7-2, a third boss 7-3 and a fourth boss 7-4 are embedded into a first groove 1a, a second groove 1b, a third groove 1j and a fourth groove 1K of the valve body 1.

Referring to fig. 5, the first rigid arm 5 and the second rigid arm 6 are symmetrically arranged around the central axis K and about the section M4, E1 and E2 are used as output force ends of a lever to counteract input force of the valve body seat 4, the first rigid arm 5 and the second rigid arm 6 are symmetrically arranged on two sides of the longitudinal section M2, a middle cylindrical hole E is hollowed out to be used for the contact between the master cylinder push rod 10 and the valve body seat 4, and the master cylinder push rod 10 needs to penetrate through the central hole E during working.

Referring to fig. 6, in the figure, a first groove 1a and a second groove 1b of a valve body 1 are symmetrically arranged at an angle of 180 degrees with respect to a longitudinal central axis K, the first groove 1a and the second groove 1b are perpendicular to a longitudinal section M1, the first groove 1a and the second groove 1b are both symmetrical with respect to two sides of the longitudinal section M1, the first groove 1a and the second groove 1b are also symmetrical with respect to a longitudinal section M3, the lower planes of the first groove 1a and the second groove 1b are lower than the lower planes of a third groove 1j and a fourth groove 1K, the difference in height is the thickness of a first rigid arm 5, two ends of a main cylinder push rod seat 7 after the first rigid arm 5 and the second rigid arm 6 are installed are stably seated on the first rigid arm 5 and the second rigid arm 6, the other two ends are stably installed in the groove of the valve body 1, a first groove fillet bottom surface 1c and a second fillet 1d are anti-interference design for the rotation action of the first rigid arm 5 and the second rigid arm 6, a, and the jaws are arranged on both sides of the longitudinal section M3.

Referring to fig. 7, in the drawing, a push rod seat 7 of a main cylinder is pressed through an elastic retainer ring 8, and the elastic retainer ring 8 is pressed under a first clamping jaw 1e, a second clamping jaw 1f, a third clamping jaw 1g and a fourth clamping jaw 1h on the inner wall of a valve body 1 in an interference mode.

Principle of operation

When the automobile is braked, the pedal input force pushes the valve rod at a certain speed to drive the valve body seat 4 to move forwards, the valve body seat 4 moves forwards to cause the displacement sensor arranged on the valve body 1 to detect the moving distance of the valve body seat 4, and a signal is transmitted to the motor controller to enable the motor to be started to generate servo force. The servo force acts on the b point of the first rigid arm 5 through the valve body 1, the first rigid arm 5 is pressed in the opposite direction of the valve body 1 by the reaction force of the hydraulic pressure of the master cylinder on the master cylinder push rod seat 7, the first rigid arm 5 inclines towards the valve body seat 4 with the a point as a supporting point and contacts with the valve body seat 4, the c point is an input force acting point on the valve body seat 4 as shown in fig. 2, and the second rigid arm 6 plays the same role. When the moment generated by the servo force is smaller than the moment generated by the valve body seat 4, the main cylinder push rod seat 7 is always pushed to drive the main cylinder push rod 10 to move forwards, the acting length of the force arm L1 acted by the servo force is unchanged along with the continuous increase of the servo force, the acting length of the input force is unchanged, the acting length L2 acted by the input force is unchanged, when the servo force is gradually increased until the acting length is larger than the moment generated by the input force on the valve body seat 4, the valve body seat 4 is pushed back to the initial position of the relative displacement sensor under the combined action of the first rigid arm 5 and the second rigid arm 6, the motor stops rotating, a balanced state is achieved, and the servo force. With the increase of the input force again, the valve body seat continues to move forwards to generate displacement difference, the motor rotates to increase the servo force, and the static pressure maintaining state is broken, so that the booster generates a follow-up phenomenon under the repeated action, and a driver can directly feel the automobile braking strength and good pedal feeling.

The assembling process comprises the following steps: as shown in figure 1, a valve body 1 is used as a base, one ends of a first rigid arm 5 and a second rigid arm 6 are located in a groove of the valve body 1, the other ends of the first rigid arm and the second rigid arm are supported by a conical spring 2, the lower end (small diameter end) of the conical spring 2 is located on a spring seat 11, the spring seat 11 is supported and suspended in the valve body 1 by a check ring 3 and is not in contact with the lower surface of the valve body 1, the check ring 3 is in interference fit with a valve body seat 4 and is pressed into an annular groove processed by the valve body seat, and the valve body seat 4 moves up and down together with the check ring 3, the spring seat. The upper surface of the rigid arm is pressed and mounted through a main cylinder push rod seat 7, the main cylinder push rod seat 7 is finally pressed and mounted through an elastic retainer ring 8, and the elastic retainer ring 8 is fixed by means of 4 bosses on the valve body 1.

Compare with car electronic booster rubber feedback dish device in the past, the utility model discloses can improve the reliability and the life of system.

Claims (5)

1. A rigid feedback device for servo force of an automobile electronic intelligent booster is characterized in that the bottom of a valve body is used as a first limiting surface, the upper surface of a retainer is used as a second limiting surface and is surrounded with the inner surface of the valve body as a third limiting surface, a first rigid arm and a second rigid arm are positioned and installed by means of a first groove and a second groove of the valve body, and a first fillet position at the bottom of the first groove is used as a yielding structure when the first rigid arm rotates; the second rigid arm is positioned and installed by means of a second groove, a round angle position II at the bottom of the second groove is used as a yielding structure when the second rigid arm rotates, the first rigid arm and the second rigid arm are supported by a conical spring to keep horizontal and static, the conical spring is installed on a valve body seat, a main cylinder push rod is guided by a retainer ring, and a small-diameter end penetrates through a central hole of the main cylinder push rod seat and penetrates through a central hole formed by the first rigid arm and the second rigid arm; the main cylinder push rod seat is embedded into the four grooves of the valve body and is pressed on the first rigid arm and the second rigid arm through elastic check rings, and the elastic check rings are in compression joint with the lower parts of the first jaw, the second jaw, the third jaw and the fourth jaw which are distributed on the valve body at 90 degrees.

2. The rigid feedback device for the servo force of the automobile electronic intelligent booster as claimed in claim 1, wherein: the first rigid arm and the second rigid arm are limited in radial and rotational freedom by the first groove and the second groove on the valve body, so that the arrangement has a symmetrical characteristic, and the action of force also has symmetry.

3. The rigid feedback device for the servo force of the automobile electronic intelligent booster as claimed in claim 2, wherein: the first groove and the second groove of the valve body are both provided with T-shaped groove characteristics and are perpendicular to the longitudinal section M1, the first groove and the second groove are symmetrical around the longitudinal section M1, the first groove and the second groove are symmetrical around the longitudinal section M3 and are matched with the first boss and the second boss of the first rigid arm and the second rigid arm respectively, and meanwhile, the first bottom fillet position and the second fillet position provide a yielding space for rotation of the first rigid arm.

4. The rigid feedback device for the servo force of the automobile electronic intelligent booster as claimed in claim 1, wherein: the first space of stepping down, the second space of stepping down, the third space of stepping down and the fourth space of stepping down of master cylinder push rod seat use longitudinal axis K to become 90 degrees angles and evenly arrange as the center, the purpose is for the assembly process smoothly through four jack catchs on the valve body and the structure space of stepping down and lighten weight, the central hole position is that master cylinder push rod path end is through the headspace and lighten weight.

5. The rigid feedback device for the servo force of the automobile electronic intelligent booster as claimed in claim 1, wherein: the large-diameter end of the conical spring supports the first rigid arm and the second rigid arm, the small-diameter end of the lower end of the conical spring is located on the spring seat, the spring seat is located on the retaining ring, and finally the retaining ring is pressed into the inner wall of the annular groove of the valve body seat to keep the conical spring, the spring seat and the retaining ring and the valve body seat to move together to support the first rigid arm to return.

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