CN101749344A

CN101749344A - Brake

Info

Publication number: CN101749344A
Application number: CN201010044418A
Authority: CN
Inventors: 王陆林; 王建辉
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2010-01-14
Filing date: 2010-01-14
Publication date: 2010-06-23

Abstract

The invention discloses a brake, comprising a mechanical driving mechanism and a braking rack push-rod mechanism, wherein the mechanical driving mechanism comprises a drive motor, a first driving gear, a driving belt and a second driving gear; and the braking rack push-rod mechanism comprises a first sun wheel driven by the second driving gear, a speed-reduction incremental size mechanism connected with the first sun wheel, a first reducing gear extended out from the speed-reduction incremental size mechanism, a second reducing gear mutually engaged with the first reducing gear and a third reducing gear driven by the second reducing gear. The third reducing gear drives a rack acting on a brake block to move by engagement. The brake adopts the non-thread gears and a rack driving mechanism. When reaction force is larger than forward propulsion, a propulsion unit of the mechanism can realize automatic backtracking, so that brake output is regulated by controlling the size of brake output torque, the non-self-locking function is realized, and the response performance of power conditioning of the brake is improved.

Description

A kind of break

Technical field

The present invention relates to a kind of break, relate in particular to a kind of Brake for vehicle.

Background technique

At present, both at home and abroad most automobile-used braking system also is based on the hydraulic control mechanical pressure and reaches the braking purpose.Novel line control brake system is just at the early-stage, it produces the braking displacement by foot treadle pressure simulation device, and handle by the respective electronic control unit and to obtain exporting braking torque, we can realize that brake signal is by the embedded controller collection and make respective handling by this technology.Wherein the performance of break is most important, and electrical braking generally adopts the motor driving mechanical device to realize braking, can use the direct drive mechanism of heavy-duty motor, and advantage is that control is flexible, and the response time is short, and shortcoming is the big cost height of volume; Can also use low-power machine by the enough big braking moment of increment mechanism output of slowing down in addition.When researching and developing along with the electronics parking system at present, the electric mechanical braking device supporting also occurred, be characterized in adopting self-locking thread, had auto-lock function, can realize the purpose of Parking under the situation about externally cancelling with it.The break of this band self-locking mechanism, want brake off must allow motor reverse, the parking system low to response time requirement allows, but to service brake, realize that the braking of per second 20～50 times is regulated, allow motor just change/reverse switching repeatedly, at first motor does not have the so fast response time, the secondly bad control of precision, the about 0.3mm of brake clearance, use motor commutation to rotate to realize reinforcement/subtract power, the control difficulty is big.

Summary of the invention

The objective of the invention is provides a kind of break in order to overcome defective recited above.

In order to solve technical problem recited above, the present invention takes following technological scheme:

A kind of break is provided, include mechanical transmission mechanism and braking tooth bar transfer bar mechanism, first driving gear that mechanical transmission mechanism includes drive motor, driven by drive motor, second driving gear that drives with the drivign belt of the first driving gear interlock, with the drivign belt interlock; Braking tooth bar transfer bar mechanism includes first sun gear that is driven by second driving gear, with first sun gear deceleration that is connected is installed and increases square mechanism, increase first reduction gear that square mechanism stretches out by deceleration, with the intermeshing reduction gear of first reduction gear, the 3rd reduction gear that is driven by reduction gear moves in the tooth bar of braking brake block by the engagement induced effect.

Deceleration increases square mechanism and further comprises shell with internal tooth and the disk cover with internal tooth, and the containing space that shell and disk cover form is placed in the first order reducing gear and the second machine reducing gear in the containing space.

Further, first order reducing gear further includes first train of reduction gears with first sun gear engagement, and has the first deceleration dish of central gear in relative rotation with the stationary axle of first sun gear; Second level reducing gear further includes second train of reduction gears with central gear engagement, and has the second deceleration dish of first reduction gear in relative rotation with the stationary axle of central gear.The inboard of first train of reduction gears and the engagement of first sun gear, its outside and the engagement of shell internal tooth; The inboard of second train of reduction gears and central gear engagement, the internal tooth engagement of its outside and disk cover.

The break that the present invention proposes, pass through output duty cycle, increase square mechanism by deceleration, thereby the output braking moment reaches the purpose of braking, when needs reduce braking moment, only need reduce to brake output torque, brake block automatic rollback under the effect of the power of brake disc like this, thereby the balance adjustment of realizable force is promptly under the situation that motor does not need to reverse, reach a kind of equilibrium of forces by output braking force and the brake disc reaction that affacts brake block between the power of braking plate, this device can be realized moving forward and backward and not locked situation when skew takes place the both sides equilibrium of forces.

The present invention has replaced the screw propulsion mechanism that can realize auto-lock function that the electronics Parking is used, and adopt non-threaded gear and rack gear, when reaction force during greater than the forward propelling force, the advancing means of this mechanism can be realized counter automatically moving back, regulate braking output by the size of control brake output torque like this, realize non-auto-lock function, improved the response performance of break power adjustment.

Description of drawings

Fig. 1 is the structural representation of break of the present invention.

Fig. 2 increases the appearance assumption diagram of square mechanism for deceleration of the present invention.

Among the figure: 1. drive motor, 2. first driving gear, 3. belt, 4. second driving gear, 5. first sun gear, 6. first train of reduction gears, 7. the first deceleration dish, 8. second train of reduction gears, 9. the second deceleration dish, 10. first reduction gear, 11. second reduction gear, 12. the 3rd reduction gear, 13. tooth bars, 14. brake blocks, 15. are slowed down and are increased square mechanism, 16. shells, 17. disk covers.

Embodiment

See also Fig. 1 and Fig. 2, as shown in the figure, a kind of break includes mechanical transmission mechanism and braking tooth bar transfer bar mechanism, first driving gear 2 that mechanical transmission mechanism includes drive motor 1, driven by drive motor 1, second driving gear 4 that drives with the drivign belt 3 of first driving gear, 2 interlocks, with drivign belt 3 interlocks; Braking tooth bar transfer bar mechanism further includes first sun gear 5 that is driven by second driving gear 4, with first sun gear 5 deceleration that is connected is installed and increases square mechanism 15, increase first reduction gear 10 that square mechanism 15 stretches out by deceleration, with first reduction gear, 10 intermeshing second reduction gear 11, the 3rd reduction gear 12 that is driven by second reduction gear 11 moves in the tooth bar 13 of braking brake block 14 by the engagement induced effect; Deceleration increases square mechanism 15 and further comprises shell 16 with internal tooth and the disk cover 17 with internal tooth, and the containing space that shell 16 and disk cover 17 form is placed in first order reducing gear and second level reducing gear in the containing space; First order reducing gear further includes first train of reduction gears 6 with the engagement of first sun gear 5, and has the first deceleration dish 7 of central gear in relative rotation with the stationary axle of first sun gear 5; The inboard of first train of reduction gears 6 and 5 engagements of first sun gear, its outside and the engagement of shell 16 internal tooths; Central gear is positioned at the central position of the first deceleration dish 7, and itself and first train of reduction gears 6 lay respectively at the both sides of the first deceleration dish 7; Second level reducing gear further includes second train of reduction gears 8 with central gear engagement, and has the second deceleration dish 9 of first reduction gear 10 in relative rotation with the stationary axle of central gear; The inboard of second train of reduction gears 8 and central gear engagement, the internal tooth engagement of its outside and disk cover 17.

The working principle of break of the present invention is as follows:

Drive motor drives first driving gear and rotates when high speed rotating, first driving gear drives second driving gear by belt and rotates, and forms elementary reducing gear; Second driving gear drives first sun gear and rotates, first sun gear puts in to slow down and increases in the shell of square mechanism, and increase the inner mesh of in-house first train of reduction gears of square with deceleration, the outside of first train of reduction gears and the engagement of the internal tooth of shell, when first sun gear drives the rotation of first train of reduction gears by its gear engagement, its stationary axle and the first deceleration dish relatively rotate, and form first order reducing gear; Driving the central gear that is positioned at the first deceleration disk center when the first deceleration dish rotates rotates; The inboard of second train of reduction gears and central gear engagement, the internal tooth engagement of its outside and disk cover; When the center gear drove the rotation of second train of reduction gears by engagement, its stationary axle and the second deceleration dish relatively rotated, and form second level reducing gear; The second deceleration dish dish drives first reduction gear and rotates when rotating, first reduction gear drives second reduction gear by its gear engagement and rotates, form third level reducing gear, second reduction gear drives the 3rd reduction gear and rotates, the 3rd reduction gear drives the tooth bar migration in braking brake block by its gear engagement, finally reach to the braking brake block boost pressure, the clamping force that generation is used to brake, passed through therebetween to slow down and increased square mechanism, thereby the purpose that the braking moment of brake request reaches braking is satisfied in output, when needs reduce braking moment, only need reduce to brake output torque, brake block automatic rollback under the effect of the power of brake disc like this, thereby the balance adjustment of realizable force is promptly under the situation that motor does not need to reverse, reach a kind of equilibrium of forces by output braking force and the brake disc reaction that affacts brake block between the power of braking plate, this device can be realized moving forward and backward and not locked situation when skew takes place the both sides equilibrium of forces.Like this, avoided the time lag that motor commutation brings and commutated repeatedly, improved the response time that braking moment output is regulated, satisfied the time performance requirement that ABS regulates the consume of motor.

Claims

1. break, it is characterized in that: comprise mechanical transmission mechanism and braking tooth bar transfer bar mechanism, first driving gear (2) that described mechanical transmission mechanism includes drive motor (1), driven by drive motor (1), second driving gear (4) that drives with the drivign belt (3) of first driving gear (2) interlock, with drivign belt (3) interlock; Described braking tooth bar transfer bar mechanism further includes first sun gear (5) that is driven by second driving gear (4), with first sun gear (5) deceleration that is connected is installed and increases square mechanism (15), increase first reduction gear (10) that square mechanism (15) stretches out by deceleration, with intermeshing second reduction gear of first reduction gear (10) (11), the 3rd reduction gear (12) that is driven by second reduction gear (11) moves by the tooth bar (13) of engagement induced effect in braking brake block (14).

2. break as claimed in claim 1, it is characterized in that: described deceleration increases square mechanism (15) and further comprises shell (16) with internal tooth and the disk cover (17) with internal tooth, the containing space that shell (16) and disk cover (17) form is placed in the first order reducing gear and the second machine reducing gear in the containing space.

3. break as claimed in claim 2, it is characterized in that: described first order reducing gear further includes first train of reduction gears (6) with first sun gear (5) engagement, and has the first deceleration dish (7) of central gear in relative rotation with the stationary axle of first sun gear (5); Described second level reducing gear further includes second train of reduction gears (8) with central gear engagement, and has the second deceleration dish (9) of first reduction gear (10) in relative rotation with the stationary axle of central gear.

4. break as claimed in claim 3 is characterized in that: the inboard of described first train of reduction gears (6) and first sun gear (5) engagement, its outside and the engagement of shell (16) internal tooth; The inboard of described second train of reduction gears (8) and central gear engagement, the internal tooth engagement of its outside and disk cover (17).