CN110701221A - Two-way synchronous reinforcement type electromechanical brake actuator based on linear motor - Google Patents

Two-way synchronous reinforcement type electromechanical brake actuator based on linear motor Download PDF

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Publication number
CN110701221A
CN110701221A CN201910996685.2A CN201910996685A CN110701221A CN 110701221 A CN110701221 A CN 110701221A CN 201910996685 A CN201910996685 A CN 201910996685A CN 110701221 A CN110701221 A CN 110701221A
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China
Prior art keywords
lever
hole
rotating pin
caliper body
brake caliper
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Granted
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CN201910996685.2A
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CN110701221B (en
Inventor
杨坤
陈玉
王杰
王有镗
董丹秀
刘庆新
刘瑞军
聂孟稳
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Shandong University of Technology
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Shandong University of Technology
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Publication of CN110701221A publication Critical patent/CN110701221A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention provides a bidirectional reinforcement type electromechanical brake actuator based on a linear motor, which is applied to an automobile and belongs to the technical field of automobile braking; the device comprises a motor, an installation base body, a two-stage force increasing mechanism and a lever force increasing mechanism; the brake caliper adopts a split structure; the motor is a linear motor; the rectangular through groove at the top of the first-stage boosting block and the lug at the bottom of the second-stage boosting block form first-stage boosting; the first inclined surface of the second-stage force-increasing block and the second inclined surface of the second-stage force-increasing block are respectively contacted with the first cylindrical roller and the second cylindrical roller to form second-stage force increase; one end of the lever is hinged with one end of the connecting rod, the other end of the connecting rod is hinged with the rotating pin on the front brake caliper body, the first lever push shaft and the second lever push shaft are respectively arranged in the U-shaped groove at the other end of the lever, and the lever shaft penetrates through the lever shaft mounting through hole.

Description

Two-way synchronous reinforcement type electromechanical brake actuator based on linear motor
Technical Field
The invention belongs to the technical field of automobile braking, and particularly relates to a bidirectional synchronous reinforcement type electromechanical brake actuator based on a linear motor.
Background
The brake system is an important component which directly influences the driving safety of the automobile and is a hotspot of research of various automobile companies; as described in "light automobile electromechanical braking and stability control system research" (yangkun. light automobile electromechanical braking and stability control system research [ D ]. vinpocetine university, 2009), electromechanical braking is used as a new braking system, and larger components such as a vacuum booster and a hydraulic pipeline are eliminated, so that the whole automobile chassis is simpler and more flexible in arrangement, has the advantages of high pressure regulation speed and accuracy, and can significantly improve the braking performance of the whole automobile.
Besides the advantage of improving the braking safety of the traditional automobile, the electromechanical braking can also effectively meet the requirements of new energy automobiles and automatic driving automobiles on braking systems; as described in the EMB-based decoupled braking energy recovery system research [ J ] in automotive engineering, 2016,38(8):1072, 1079 ], the electromechanical braking system can meet the requirements of the decoupled braking energy recovery system on the accurate and independent adjustment of the brake pedal feel and the wheel braking force, and can realize the active braking function, so that the research on the electromechanical braking system has important significance for improving the economy of the electric vehicle and promoting the electromotion and intellectualization of the vehicle, and the research on the electromechanical braking system becomes the object of the research on the automobile braking system again.
The electromechanical brake actuator can realize bidirectional synchronous reinforcement, and the linear motor is used as a power source, so that the volume of the electromechanical brake actuator can be effectively reduced, and particularly a compact vehicle with a small brake system installation space is provided.
Disclosure of Invention
The invention provides a bidirectional synchronous reinforcement type electromechanical brake actuator based on a linear motor, which is characterized in that: the double-stage boosting mechanism mainly comprises a motor, a mounting base body, a double-stage boosting mechanism and a lever boosting mechanism.
The motor (1) is a linear motor, and an external thread is arranged on the motor shaft (2).
The mounting base includes an end cap (4), an actuator housing and a bracket.
The actuator shell comprises a force-increasing mechanism shell (6), a rear brake caliper body (14), a first-stage force-increasing block supporting seat (27), a first arc guide rail (42) and a second arc guide rail (43).
The force-increasing mechanism shell (6) is of a cylindrical structure, and a first piston mounting through hole (35) is formed in the inner end face (D2) of the force-increasing mechanism shell.
A square through hole (41) is formed in the upper end face (B2) of the force-increasing mechanism shell, and two planes of the square through hole (41) are parallel to the motor shaft (2); a first lever shaft mounting hole (48) and a second lever shaft mounting hole (49) are respectively formed in two planes parallel to the motor shaft (2) in the square through hole (41); the lever shaft (8) is fixed between the first lever shaft mounting hole (48) and the second lever shaft mounting hole (49), and the lever shaft (8) is parallel to the upper end surface (B2) of the force increasing mechanism shell and the upper end surface of the first-stage force increasing block (24) and is perpendicular to the central axis of the motor shaft (2).
A first cylindrical guide rail support (37) and a second cylindrical guide rail support (50) are fixedly installed on two sides of a first piston installation through hole (35) on the inner end surface (D2) of the force-increasing mechanism shell, a cylindrical guide rail (25) is fixedly installed between the first cylindrical guide rail support (37) and the second cylindrical guide rail support (50), and the cylindrical guide rail (25) is parallel to the lever shaft (8); a first-stage boosting block supporting seat (27) is fixedly arranged at the bottom of the inner side of the boosting mechanism shell (6), and a semicircular guide groove (36) is arranged at the top of the first-stage boosting block supporting seat (27).
The rear brake caliper body (14) is of a bilaterally symmetrical structure, and a second piston mounting through hole (46) is formed in the middle of the rear brake caliper body; a first annular groove (44) and a second annular groove (45) are sequentially arranged on the second piston mounting through hole (46) along the direction from the first friction plate (15) to the force-increasing mechanism shell (6), the first annular groove (44) is used for mounting a dust ring (12), and the second annular groove (45) is used for mounting a sealing ring (11); a first arc guide rail (42) and a second arc guide rail (43) are symmetrically and fixedly arranged on the front end surface (A1) of the rear brake caliper body; the rear end surface (B1) of the rear brake caliper body is fixedly connected with the front end surface (A2) of the force-increasing mechanism shell.
The central axes of the first piston mounting through hole (35) of the force-increasing mechanism shell (6) and the second piston mounting through hole (46) on the rear brake caliper body (14) are overlapped and have the same radius.
The left side and the right side of the outer portion of the rear brake caliper body (14) are symmetrically provided with a first supporting rod (33) and a second supporting rod (40), the first supporting rod (33) is provided with a first supporting rod connecting hole (34), and the second supporting rod (40) is provided with a second supporting rod connecting hole (39).
The double-stage force increasing mechanism comprises a first-stage force increasing block (24), a second-stage force increasing block (26), a piston (13), a first cylindrical roller (23) and a second cylindrical roller (62).
The first-stage force-increasing block (24) is of a square structure, a first threaded hole (28) with the axis vertical to the plane is arranged on the front end surface (A3) of the first-stage force-increasing block, the motor shaft (2) passes through a motor shaft through hole (30) on the end cover (4), the external thread on the motor shaft (2) is matched and connected with the internal thread on the first threaded hole (28), a first lever push shaft (52), a first lever push shaft fixing limiting rod (53), a second lever push shaft (55) and a second lever push shaft fixing limiting rod (56) are respectively arranged on the left side surface and the right side surface which are perpendicular to the front end surface (A3) of the first-stage boosting block, the four sides surfaces are cylindrical structures, the central axes of the first lever push shaft (52), the first lever push shaft fixing limiting rod (53), the second lever push shaft fixing limiting rod (55) and the second lever push shaft fixing limiting rod (56) are overlapped, the radiuses of the first lever push shaft fixing limiting rod (53) and the second lever push shaft fixing limiting rod (56) are equal, and the radiuses of the first lever push shaft (52) and the second lever push shaft (55) are larger; the bottom of the first-stage force-increasing block (24) is provided with a semi-cylindrical semi-circular guide rail (57), the semi-circular guide rail (57) is matched with a semi-circular guide groove (36) on the first-stage force-increasing block supporting seat (27), and the first-stage force-increasing block supporting seat (27) is used for supporting the first-stage force-increasing block (24) and plays a role in motion guiding; the top of the first-stage boosting block (24) is provided with more than 2 rectangular through grooves (54), the bottoms of the rectangular through grooves (54) are parallel to the upper plane and the lower plane of the first-stage boosting block (24), the longitudinal symmetry lines of the grooves are parallel to each other, the symmetry center line in the length direction forms an angle alpha with the motor axis, and the angle alpha is also the included angle between the piston axis A6 and the groove center line B6.
The upper end face and the lower end face of a second-stage boosting block (26) are parallel to each other, each side face is perpendicular to the upper end face and the lower end face of the second-stage boosting block, the lower end face of the second-stage boosting block (26) is provided with lugs (59) which are equal to the rectangular through grooves (54) at the tops of the first-stage boosting blocks (24) in number and correspond to the positions one by one, each lug (59) is embedded into the corresponding rectangular through groove (54) and can move back and forth in the rectangular through groove (54), the left end face (A4) of the second-stage boosting block is provided with a circular through hole (58) with the axis perpendicular to the end face, a cylindrical guide rail (25) penetrates through the circular through hole (58), the second-stage boosting block (26) can move axially along the cylindrical guide rail (25), a first inclined face (B4) of the second-stage boosting block and a second inclined face (C4) of the second-stage boosting block are respectively contacted with a first cylindrical roller (23) and a second cylindrical roller (62), the two are parallel to each other and perpendicular to the upper and lower end faces of the second-stage force-increasing block (26), the two inclined planes and the central line of the motor form an angle beta, and the angle beta is the included angle between the inclined planes B4 and C4 and the axis A6 of the piston.
The main body of the piston (13) is of a circular structure, the section of the main body is rectangular, the front end face (A5) of the piston is used for fixedly connecting a first friction plate (15), and the rear end face (B5) of the piston is fixedly connected with a first cylindrical roller support (21), a second cylindrical roller support (22), a third cylindrical roller support (60) and a fourth cylindrical roller support (61); two ends of the first cylindrical roller (23) are respectively supported between the first cylindrical roller support (21) and the second cylindrical roller support (22) through bearings; two ends of the second cylindrical roller (62) are respectively supported between the third cylindrical roller support (60) and the fourth cylindrical roller support (61) through bearings; the axes of the first cylindrical roller (23) and the second cylindrical roller (62) are parallel to each other, and are both parallel to the rear end face (B5) of the piston.
When the braking force is not 0, the first cylindrical roller (23) is in contact with a first inclined surface (B4) of the second-stage force-increasing block, the second cylindrical roller (62) is in contact with a second inclined surface (C4) of the second-stage force-increasing block, two contact lines are parallel to each other and perpendicular to the central axis of the circular through hole (58) in the whole movement process, and the plane of the two contact lines is perpendicular to the axis of the motor and parallel to the plane opposite to the first inclined surface (B4) of the second-stage force-increasing block and the second inclined surface (C4) of the second-stage force-increasing block.
The lever force-increasing mechanism comprises a lever (7), a lever shaft (8), a lever connecting rod rotating pin (9) and a connecting rod (10).
The lever (7) is provided with three connecting ends which are respectively a connecting rod connecting end (64), a first lever push shaft connecting end (68) and a second lever push shaft connecting end (70), the lever (7) is of a Y-shaped bilateral symmetry structure, the first lever push shaft connecting end (68) and the second lever push shaft connecting end (70) are positioned on two sides of a bilateral symmetry plane and are symmetrical to each other, and the distance between the inner side of the first lever push shaft connecting end (68) and the inner side of the second lever push shaft connecting end (70) is equal to the distance between the outer end face of the first lever push shaft fixed limiting rod (53) and the outer end face of the second lever push shaft fixed limiting rod (56); the connecting rod connecting end (64) is positioned on the left and right symmetrical plane of the lever (7); a first lever connecting rod rotating pin mounting through hole (65) and a lever shaft mounting through hole (66) are sequentially arranged from outside to inside at the end part of the connecting rod connecting end (64); a first lever push shaft installation U-shaped groove (67) is formed in the end part of the first lever push shaft connecting end (68); a second lever push shaft installation U-shaped groove (69) is formed in the end part of the second lever push shaft connecting end (70); the first lever push shaft (52) is arranged in the first lever push shaft installation U-shaped groove (67) and can move back and forth along the first lever push shaft installation U-shaped groove (67), and the second lever push shaft (55) is arranged in the second lever push shaft installation U-shaped groove (69) and can move back and forth along the second lever push shaft installation U-shaped groove (69); the lever shaft (8) penetrates through the lever shaft mounting through hole (66), and the lever (7) rotates around the lever shaft (8).
The connecting rod (10) is provided with four connecting ends, the connecting rod (10) is of a Y-shaped bilateral symmetry structure, the first lever connecting end (73) and the second lever connecting end (76) are located at one end, the first lever connecting end (73) and the second lever connecting end (76) are parallel to each other, a groove (75) is formed between the first lever connecting end and the second lever connecting end, the distance between the inner end faces of the groove (75) is equal to the length of the first lever connecting rod rotating pin mounting through hole (65), the first lever connecting end (73) is provided with a second lever connecting rod rotating pin mounting through hole (74), the second lever connecting end (76) is provided with a third lever connecting rod rotating pin mounting through hole (77), and the central axes of the second lever connecting rod rotating pin mounting through hole (74) and the third lever connecting rod rotating pin mounting; the first front brake caliper body connecting end (72) and the second front brake caliper body connecting end (78) are located on the other side of the connecting rod (10), a first connecting rod rotating pin mounting through hole (71) is formed in the end portion of the first front brake caliper body connecting end (72), and a second connecting rod rotating pin mounting through hole (79) is formed in the end portion of the second front brake caliper body connecting end (78).
The lever connecting rod rotating pin (9) sequentially passes through the second lever connecting rod rotating pin mounting through hole (74), the first lever connecting rod rotating pin mounting through hole (65) and the third lever connecting rod rotating pin mounting through hole (77), so that the lever (7) and the connecting rod (10) are hinged.
The front brake caliper body (18) is in a left-right symmetrical structure; the cross section of the side surface is in an inverted L shape; the front brake caliper body (18) comprises a first front brake caliper body support (16), a second front brake caliper body support (82), a first arc groove (85), a second arc groove (86) and a friction plate support plate (87), wherein the friction plate support plate (87) is positioned at the lower part of the front brake caliper body (18), the middle part of the friction plate support plate is provided with a U-shaped groove, used for fixedly mounting a second friction plate (17), a first arc groove (85) and a second arc groove (86) are arranged at the upper part of the front brake caliper body (18), the first arc groove (85) and the second arc groove (86) are in symmetrical relation relative to the left-right central symmetrical plane of the front brake caliper body (18), a second arc guide rail (43) is arranged in the first arc groove (85), the shape and the size of the second arc guide rail (43) are the same as those of the first arc groove (85), and the second arc guide rail (43) can only freely move back and forth along the first arc groove (85); after installation, the first arc guide rail (42) is arranged in the second arc groove (86), the shape and the size of the first arc guide rail (42) are the same as those of the second arc groove (86), and the first arc guide rail (42) can only freely move back and forth along the second arc groove (86); a first front brake caliper body support (16) and a second front brake caliper body support (82) are fixedly arranged at the top of a front brake caliper body (18), the first front brake caliper body support (16) and the second front brake caliper body support (82) are in symmetrical relation relative to the left-right central symmetrical plane of the front brake caliper body (18), the first front brake caliper body support (16) is fixedly arranged above a second circular arc groove (86), the middle of the first front brake caliper body support is provided with a U-shaped groove, two sides of the U-shaped groove are respectively provided with a first rotating pin mounting hole (80) and a second rotating pin mounting hole (81), and the central axes of the first rotating pin mounting hole (80) and the second rotating pin mounting hole (81) are mutually overlapped; the second front brake caliper body support (82) is fixedly arranged above the first arc groove (85), the middle of the second front brake caliper body support is a U-shaped groove, a third rotating pin mounting hole (83) and a fourth rotating pin mounting hole (84) are formed in the two sides of the U-shaped groove respectively, and the central axes of the third rotating pin mounting hole (83) and the fourth rotating pin mounting hole (84) are overlapped.
A first rotating pin (90) is installed between the first rotating pin installation hole (80) and the second rotating pin installation hole (81) through a first bearing (88) and a second bearing (89), and a first connecting rod rotating pin installation hole (71) on the first front brake caliper body connecting end (72) is connected with the first rotating pin (90) in a matched mode; the second rotating pin (91) is installed between the third rotating pin installation hole (83) and the fourth rotating pin installation hole (84) through a third bearing (92) and a fourth bearing (93), and a second connecting rod rotating pin installation hole (79) on the second front brake caliper body connecting end (78) is in matched connection with the second rotating pin (91).
Compared to conventional braking system solutions: according to the scheme, all functions of traditional braking can be realized through the linear motor and the related transmission system, and active braking can be realized, so that a solution is provided for a traditional vehicle braking system and a decoupling type braking energy recovery and intelligent driving vehicle braking system of a new energy vehicle.
Compared with the existing electromechanical brake actuator: the brake caliper is a brand new mechanism, adopts a brake caliper body with a split structure, a two-stage force increasing mechanism and a lever force increasing mechanism, and is a brand new structural form; under the condition of the same volume, the boosting effect of the scheme is larger, and under the condition of the same braking force, the scheme has smaller volume; in addition, the linear motor is adopted as the brake actuator, the size of the electronic mechanical brake actuator can be effectively reduced, and the problem that the installation space of the compact vehicle electronic mechanical brake system is narrow can be effectively solved.
Drawings
Fig. 1 is an assembly diagram of a bidirectional reinforcement type electromechanical brake actuator based on a linear motor.
Fig. 2 is a right side view of the motor (1).
Fig. 3 is a right side view of the end cap (4).
Fig. 4 is a three-dimensional block diagram of the actuator housing of fig. 1.
Fig. 5 is a cross-sectional view of the actuator housing 1.
Fig. 6 is a cross-sectional view of the actuator housing 2 (separated state).
Fig. 7 is a left side view (a direction) of the actuator housing.
Fig. 8 is a right side view (direction B) of the actuator housing.
FIG. 9 is a cross-sectional view of the actuator housing C-C.
Fig. 10 is a three-dimensional block diagram of the actuator housing of fig. 2.
Fig. 11 is an exploded view of the actuator housing 1.
Fig. 12 is an exploded view of the actuator housing 2.
Fig. 13 is a three-dimensional structure diagram of the first-stage force-increasing block (24) of the two-stage force-increasing mechanism.
Fig. 14 is a front view of the one-stage force block (24) of the two-stage force increasing mechanism.
Fig. 15 is a plan view of the first-stage force-increasing block (24) of the two-stage force-increasing mechanism.
Fig. 16 is a three-dimensional structure diagram of a two-stage force-increasing block (26) of the two-stage force-increasing mechanism.
Fig. 17 is a plan view of the two-stage force increasing block (26) of the two-stage force increasing mechanism.
Fig. 18 is a side view of the two-stage force block (26) of the two-stage force increasing mechanism.
Fig. 19 is a bottom view of the two-stage force increasing block (26) of the two-stage force increasing mechanism.
Fig. 20 is a three-dimensional structural view of the piston (13) of the two-stage force amplification mechanism.
Fig. 21 is a side view of the dual stage force amplifier piston (13).
Fig. 22 is a front view of the dual stage force amplifier piston (13).
Fig. 23 is a force-increasing principle schematic diagram of the two-stage force-increasing mechanism.
Fig. 24 is a three-dimensional structural view of the lever (7) of the lever force amplifier.
Fig. 25 is a three-dimensional structural view of the lever force amplification mechanism link (10).
Fig. 26 is a front view of the lever force amplifier front caliper body (18).
Fig. 27 is a three-dimensional structure diagram of the front caliper body (18) of the lever force amplifier.
FIG. 28 is a cross-sectional view of the front caliper body A-A.
FIG. 29 is a schematic view of the rotation pin installation.
FIG. 30 is a three-dimensional view of an electromechanical brake actuator.
Fig. 31 is a three-dimensional view of the internal structure of the electromechanical brake actuator.
Fig. 32 is an exploded view of the three-dimensional structure of the stent.
FIG. 33 is a three-dimensional structural view of a stent.
Fig. 34 is a front view of the bracket.
Fig. 35 is a top view of the stent.
Fig. 36 is a top view of the bracket mounting.
In the figure: 1. a motor; 2. a motor shaft; 3. a motor fixing bolt; 4. an end cap; 5. an end cover fixing bolt; 6. a force increasing mechanism housing; 7. a lever; 8. a lever shaft; 9. a lever link pivot pin; 10. a connecting rod; 11. a seal ring; 12. a dust ring; 13. a piston; 14. a rear caliper body; 15. a first friction plate; 16. a first front caliper body support; 17. a second friction plate; 18. a front caliper body; 19. a brake caliper body limiting cross rod; 20. a brake disc; 21. a first cylindrical roller support; 22. a second cylindrical roller support; 23. a first cylindrical roller; 24. a first-stage force increasing block; 25. a cylindrical guide rail; 26. a second-stage force increasing block; 27. a first-stage reinforcement block supporting seat; 28. a first threaded hole; 29. a first motor fixing threaded hole; 30. a motor shaft through hole; 31. the second motor fixes the threaded hole; 32. the first end cover is fixed with the threaded hole; 33. a first support bar; 34. a first support rod connection hole; 35. a first piston mounting through-hole; 36. a semicircular guide groove; 37. a first cylindrical guide rail support; 38. the second end cover is fixedly threaded; 39. a second support bar connection hole; 40. a second support bar; 41. a square through hole; 42. a first arc guide rail; 43. a second arc guide rail; 44. a first annular groove; 45. a second annular groove; 46. a second piston mounting through hole; 47. a second cylindrical guide rail mounting hole; 48. a first lever shaft mounting hole; 49. a second lever shaft mounting hole; 50. a second cylindrical guide rail support; 51. a first cylindrical guide rail mounting hole; 52. a first lever push shaft; 53. the first lever push shaft is used for fixing the limiting rod; 54. a rectangular through groove; 55. a second lever push shaft; 56. the second lever push shaft fixes the limiting rod; 57. a semicircular guide rail; 58. a circular through hole; 59. a bump; 60. a third cylindrical roller support; 61. a fourth cylindrical roller support; 62. a second cylindrical roller; 63. a piston central bore; 64. a connecting rod connecting end; 65. the first lever connecting rod rotating pin mounting through hole; 66. the lever shaft is provided with a through hole; 67. the first lever push shaft is provided with a U-shaped groove; 68. the first lever pushes the axle link end; 69. the second lever push shaft is provided with a U-shaped groove; 70. the second lever pushes the axle link end; 71. a first link pivot pin mounting hole; 72. the first front brake caliper body connecting end; 73. a first lever connection end; 74. a second lever connecting rod rotating pin mounting through hole; 75. a groove; 76. a second lever connection end; 77. a third lever connecting rod rotating pin mounting through hole; 78. the second front brake caliper body connecting end; 79. a second connecting rod rotation pin mounting hole; 80. a first rotating pin mounting hole; 81. a second pivot pin mounting hole; 82. a second front caliper body support; 83. a third rotation pin mounting hole; 84. a fourth rotation pin mounting hole; 85. a first arc groove; 86. a second arc groove; 87. a friction plate support plate; 88. a first bearing; 89. a second bearing; 90. a first rotation pin; 91. a second rotation pin; 92. a third bearing; 93. a fourth bearing; 94. a bracket first mounting threaded hole; 95. a first support arm; 96. a second support arm; 97. a second mounting threaded hole of the bracket; 98. the first bracket hub is fixedly threaded; 99. the bracket fixes the cross rod; 100. the second bracket hub is fixed with a threaded hole; 101. a bracket first fixing bolt; 102. and a second fixing bolt of the bracket.
The meaning of each end face and included angle in the figure is as follows:
in FIGS. 4 to 12: a1, the front end surface of the rear brake caliper body; b1, the rear end face of the rear brake caliper body; a2, the front end face of the force-increasing mechanism shell; b2, the upper end face of the force-increasing mechanism shell; c2, the rear end face of the force-increasing mechanism shell; d2, the internal end face of the force increasing mechanism shell.
In fig. 13: a3, front end face of the first-stage force-increasing block.
In FIGS. 16 to 19 and 23: a4, the left end face of the second-stage force-increasing block; b4, a first inclined surface of the second-stage force-increasing block; c4, second inclined surface of the second-stage force-increasing block.
In FIGS. 20 to 21: a5, the front end face of the piston; b5, piston rear end face.
In fig. 23: a6, piston center axis; b6, groove center line; alpha, the included angle between the central axis A6 of the piston and the central line B6 of the groove; beta, inclined planes B4 and C4 form included angles with the central axis A6 of the piston.
In fig. 32: a7, brake caliper body limiting surface; b7, the left end face of the brake caliper body limiting cross rod; c7, the upper end surface of the second bracket arm; d7, the front end face of the second bracket arm; e7, fixing the upper end surface of the cross rod by the first bracket; f7, fixing the upper end face of the cross bar by the second support; g7, the front end face of the first support arm; h7, the upper end face of the first support arm; i7, fixing the front end face of the cross bar by the bracket.
Detailed description of the preferred embodiments
The invention provides a bidirectional synchronous reinforcement type electromechanical brake actuator based on a linear motor, which is further described in detail by referring to the attached drawings and taking examples in order to make the technical scheme and the effect of the invention clearer and clearer; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A bidirectional synchronous force-increasing electromechanical brake actuator based on a linear motor mainly comprises an installation base body, a motor, a two-stage force-increasing mechanism and a lever force-increasing mechanism.
The motor (1) is a linear motor, and an external thread is arranged on the motor shaft (2).
As shown in fig. 1-2, 8 first motor fixing threaded holes (29) are formed in a boss at the end of the motor (1), and the first motor fixing threaded holes (29) play a role in fixing the motor, and the number is not limited to 8.
As shown in fig. 1, the mounting base includes an end cap (4), an actuator housing and a bracket.
As shown in fig. 1 and 3, the end cover (4) is provided with 1 motor shaft through hole (30), 8 second motor fixing threaded holes (31) and 13 first end cover fixing threaded holes (32); the second motor fixing threaded holes (31) correspond to the first motor fixing threaded holes (29) one by one, mainly play a role of fixing the motors, are not limited to 8 in number and can be increased or decreased according to actual installation conditions; the first end cover fixing threaded holes (32) are used for fixing end covers, the number of the first end cover fixing threaded holes is not limited to 13, and the number of the first end cover fixing threaded holes can be increased or decreased according to actual installation conditions.
As shown in fig. 1 and 4-12, the actuator shell comprises a force-increasing mechanism shell (6), a rear brake caliper body (14), a first-stage force-increasing block supporting seat (27), a first arc guide rail (42) and a second arc guide rail (43).
As shown in fig. 4, the force-increasing mechanism housing (6) is a cylindrical structure, and a second end cap fixing threaded hole (38) matched with the first end cap fixing threaded hole (32) is formed in the rear end face (C2) of the force-increasing mechanism housing, and the two are identical in number and correspond in position one to one.
As shown in fig. 4 to 6, the first piston mounting through hole (35) is provided on the inner end surface (D2) of the force increasing mechanism case.
As shown in fig. 1, 4-6 and 9, a square through hole (41) is arranged on the upper end surface (B2) of the force-increasing mechanism shell, and two side surfaces of the square through hole (41) are parallel to the motor shaft (2); as shown in fig. 9, a first lever shaft mounting hole (48) and a second lever shaft mounting hole (49) are provided in two planes parallel to the motor shaft (2) in the square through hole (41); the lever shaft (8) is fixed between the first lever shaft mounting hole (48) and the second lever shaft mounting hole (49), and the lever shaft (8) is parallel to the upper end surface (B2) of the force-increasing mechanism shell and is perpendicular to the central axis of the motor shaft (2).
As shown in fig. 4-5, 8-9 and 12, a first cylindrical guide rail support (37) and a second cylindrical guide rail support (50) are fixedly installed on two sides of a first piston installation through hole (35) on the inner end surface (D2) of the force-increasing mechanism shell, a cylindrical guide rail (25) is fixedly installed between the first cylindrical guide rail support (37) and the second cylindrical guide rail support (50), and the cylindrical guide rail (25) is parallel to the lever shaft (8); a first-stage boosting block supporting seat (27) is fixedly arranged at the bottom of the inner side of the boosting mechanism shell (6), and a semicircular guide groove (36) is arranged at the top of the first-stage boosting block supporting seat (27).
As shown in fig. 7, the rear caliper body (14) has a bilaterally symmetrical structure, and a second piston mounting through hole (46) is provided in the middle.
As shown in fig. 5 to 6, a first annular groove (44) and a second annular groove (45) are sequentially formed in the second piston mounting through hole (46) along the direction from the first friction plate (15) to the force increasing mechanism shell (6), the first annular groove (44) is used for mounting the dust ring (12), and the second annular groove (45) is used for mounting the sealing ring (11).
As shown in fig. 5, 7 and 10-11, a first arc guide rail (42) and a second arc guide rail (43) are symmetrically and fixedly arranged on the front end surface (a1) of the rear caliper body.
As shown in fig. 5-6 and 10, the rear end surface (B1) of the rear caliper body is fixedly connected with the front end surface (a2) of the force-increasing mechanism housing.
As shown in fig. 5, the first piston mounting through hole (35) of the force-increasing mechanism housing (6) and the second piston mounting through hole (46) of the rear caliper body (14) are overlapped in central axis and equal in radius.
As shown in fig. 7 and 10-12, the rear caliper body (14) is symmetrically provided with a first support rod (33) and a second support rod (40) at the left and right sides, the first support rod (33) is provided with a first support rod connection hole (34), and the second support rod (40) is provided with a second support rod connection hole (39).
As shown in FIG. 1, the two-stage force increasing mechanism comprises a first-stage force increasing block (24), a second-stage force increasing block (26), a piston (13), a first cylindrical roller (23) and a second cylindrical roller (62).
As shown in fig. 13-15, the main body of the first-stage force-increasing block (24) is of a cuboid structure, and a first threaded hole (28) with an axis vertical to the plane is arranged on the front end surface (A3) of the first-stage force-increasing block; a first lever push shaft (52), a first lever push shaft fixing limiting rod (53), a second lever push shaft (55) and a second lever push shaft fixing limiting rod (56) are respectively arranged on two side faces perpendicular to the front end face (A3) of the first-stage boosting block, the first lever push shaft fixing limiting rod, the second lever push shaft fixing limiting rod and the second lever push shaft fixing limiting rod are of cylindrical structures, the central axes of the first lever push shaft (52) and the second lever push shaft (55) are coincident, the radiuses of the first lever push shaft fixing limiting rod (53) and the second lever push shaft fixing limiting rod (56) are equal, and the radius of the first lever push shaft (52) is smaller than the radius of the first lever push shaft fixing limiting rod (53); the bottom of the first-stage force-increasing block (24) is provided with a semi-cylindrical semi-circular guide rail (57), the semi-circular guide rail (57) is matched with a semi-circular guide groove (36) on the first-stage force-increasing block supporting seat (27), and the first-stage force-increasing block supporting seat (27) is used for supporting the first-stage force-increasing block (24) and plays a role in motion guiding; the top of the first-stage force-increasing block (24) is provided with more than 2 rectangular through grooves (54), the bottoms of the rectangular through grooves (54) are parallel to the upper plane and the lower plane of the first-stage force-increasing block (24), the longitudinal symmetry lines of the grooves are parallel to each other, the symmetry center line in the length direction forms an angle alpha with the motor axis, and the angle alpha is also the included angle between the piston axis A6 and the groove center line B6, as shown in figure 23.
As shown in figures 1, 3 and 13, the motor shaft (2) passes through a motor shaft through hole (30) on the end cover (4) and is in fit connection with an internal thread on the first threaded hole (28) through an external thread on the motor shaft (2).
As shown in fig. 16-19, the upper and lower end faces of the second-stage force-increasing block (26) are parallel to each other, each side face is perpendicular to the upper and lower end faces, the lower end face of the second-stage force-increasing block (26) is provided with lugs (59) which are equal to the rectangular through grooves (54) at the top of the first-stage force-increasing block (24) in number and correspond to the positions one by one, each lug (59) is embedded into the corresponding rectangular through groove (54) and can move back and forth in the rectangular through groove (54), the left end face (a4) of the second-stage force-increasing block is provided with a circular through hole (58) with the axis perpendicular to the end face, the cylindrical guide rail (25) passes through the circular through hole (58), the second-stage force-increasing block (26) can move axially along the cylindrical guide rail (25), the first inclined face (B4) of the second inclined face (C4) of the second-stage force-increasing block is in contact with the first cylindrical roller (23) and the second cylindrical roller (62), the first inclined face (, the two are parallel to each other, the inclined planes are perpendicular to the upper end face and the lower end face, an angle beta is formed between the inclined planes B4 and C4 and the axis A6 of the piston, and the angle beta is also an included angle between the inclined planes B4 and C4 and the axis A6 of the piston as shown in FIG. 23.
As shown in fig. 20-22, the main body of the piston (13) is a circular ring structure, the cross section of the main body is rectangular, the front end surface (a5) of the piston is used for fixedly connecting a first friction plate (15), and the rear end surface (B5) of the piston is fixedly connected with a first cylindrical roller support (21), a second cylindrical roller support (22), a third cylindrical roller support (60) and a fourth cylindrical roller support (61); two ends of the first cylindrical roller (23) are respectively supported between the first cylindrical roller support (21) and the second cylindrical roller support (22) through bearings; two ends of the second cylindrical roller (62) are respectively supported between the third cylindrical roller support (60) and the fourth cylindrical roller support (61) through bearings; the axes of the first cylindrical roller (23) and the second cylindrical roller (62) are parallel to each other, and are both parallel to the rear end face (B5) of the piston.
When the braking force is not 0, as shown in fig. 23, the first cylindrical roller (23) is always in contact with the first inclined surface (B4) of the second-stage force-increasing block, the second cylindrical roller (62) is always in contact with the second inclined surface (C4) of the second-stage force-increasing block, two contact lines are parallel to each other and are perpendicular to the central axis of the circular through hole (58) in the whole movement process, and the plane of the two contact lines is perpendicular to the axis of the motor and is parallel to the plane opposite to the first inclined surface (B4) of the second-stage force-increasing block and the second inclined surface (C4) of the second-stage force-increasing block.
As shown in fig. 1 and 30-31, the lever force-increasing mechanism comprises a lever (7), a lever shaft (8), a lever connecting rod rotating pin (9) and a connecting rod (10).
As shown in fig. 24, the lever (7) has three connection ends, which are a connection rod connection end (64), a first lever push shaft connection end (68), and a second lever push shaft connection end (70), the lever (7) has a Y-shaped bilateral symmetry structure, the first lever push shaft connection end (68) and the second lever push shaft connection end (70) are located on two sides of the bilateral symmetry plane and are symmetrical to each other, and the distance between the inner side of the first lever push shaft connection end (68) and the inner side of the second lever push shaft connection end (70) is equal to the distance between the outer end face of the first lever push shaft fixing limiting rod (53) and the outer end face of the second lever push shaft fixing limiting rod (56); the connecting rod connecting end (64) is positioned on the left and right symmetrical plane of the lever (7); the connecting rod connecting end (64) is sequentially provided with a first lever connecting rod rotating pin mounting through hole (65) and a lever shaft mounting through hole (66) from outside to inside; a first lever push shaft installation U-shaped groove (67) is formed in the end part of the first lever push shaft connecting end (68); the end part of the connecting end (70) of the second lever push shaft is provided with a U-shaped groove (69) for installing the second lever push shaft.
As shown in fig. 29, the first lever push shaft (52) is disposed in the first lever push shaft mounting U-shaped groove (67) and can move back and forth along the first lever push shaft mounting U-shaped groove (67), and the second lever push shaft (55) is disposed in the second lever push shaft mounting U-shaped groove (69) and can move back and forth along the second lever push shaft mounting U-shaped groove (69);
as shown in figures 1 and 29, the lever shaft (8) passes through the lever shaft mounting through hole (66), and the lever (7) rotates around the lever shaft (8).
As shown in fig. 25, the connecting rod (10) has four connecting ends, the connecting rod (10) is a Y-shaped bilateral symmetry structure, the first lever connecting end (73) and the second lever connecting end (76) are located at one end, the first lever connecting end (73) and the second lever connecting end (76) are parallel to each other, a groove (75) is formed between the first lever connecting end and the second lever connecting end, the distance between the inner end surfaces of the groove (75) is equal to the length of the first lever connecting rod rotating pin mounting through hole (65), the first lever connecting end (73) is provided with the second lever connecting rod rotating pin mounting through hole (74), the second lever connecting end (76) is provided with the third lever connecting rod rotating pin mounting through hole (77), and the central axes of the second lever connecting rod rotating pin mounting through hole (74) and the third lever connecting rod rotating pin mounting through hole; the first front brake caliper body connecting end (72) and the second front brake caliper body connecting end (78) are located on the other side of the connecting rod (10), a first connecting rod rotating pin mounting through hole (71) is formed in the end portion of the first front brake caliper body connecting end (72), and a second connecting rod rotating pin mounting through hole (79) is formed in the end portion of the second front brake caliper body connecting end (78).
As shown in fig. 31, the lever link pivot pin (9) passes through the second lever link pivot pin installation through-hole (74), the first lever link pivot pin installation through-hole (65), and the third lever link pivot pin installation through-hole (77) in this order, thereby accomplishing the hinge connection of the lever (7) and the link (10).
As shown in fig. 26 to 27 and 29, the front caliper body (18) has a bilaterally symmetrical structure.
As can be seen from FIGS. 27-28, the side cross-section is an inverted L-shape.
As can be seen from FIGS. 26 to 29, the front caliper body (18) has a left-right symmetrical structure; the cross section of the side surface is in an inverted L shape; the front brake caliper body (18) comprises a first front brake caliper body support (16), a second front brake caliper body support (82), a first arc groove (85), a second arc groove (86) and a friction plate support plate (87), the friction plate support plate (87) is positioned at the lower part of the front brake caliper body (18), the middle part of the friction plate support plate is provided with a U-shaped groove and is used for fixedly mounting a second friction plate (17), the upper part of the front brake caliper body (18) is provided with the first arc groove (85) and the second arc groove (86), and the first arc groove (85) and the second arc groove (86) are in symmetrical relation relative to the left and right central symmetrical surfaces of the front brake caliper body (18); after installation, the second arc guide rail (43) is arranged in the first arc groove (85), the shape and the size of the second arc guide rail (43) are the same as those of the first arc groove (85), and the second arc guide rail (43) can only freely move back and forth along the first arc groove (85); after installation, the first arc guide rail (42) is arranged in the second arc groove (86), the shape and the size of the first arc guide rail (42) are the same as those of the second arc groove (86), and the first arc guide rail (42) can only freely move back and forth along the second arc groove (86); a first front brake caliper body support (16) and a second front brake caliper body support (82) are fixedly arranged at the top of a front brake caliper body (18), the first front brake caliper body support (16) and the second front brake caliper body support (82) are in symmetrical relation relative to the left-right central symmetrical plane of the front brake caliper body (18), the first front brake caliper body support (16) is fixedly arranged above a second circular arc groove (86), the middle of the first front brake caliper body support is provided with a U-shaped groove, two sides of the U-shaped groove are respectively provided with a first rotating pin mounting hole (80) and a second rotating pin mounting hole (81), and the central axes of the first rotating pin mounting hole (80) and the second rotating pin mounting hole (81) are mutually overlapped; the second front brake caliper body support (82) is fixedly arranged above the first arc groove (85), the middle of the second front brake caliper body support is a U-shaped groove, a third rotating pin mounting hole (83) and a fourth rotating pin mounting hole (84) are formed in the two sides of the U-shaped groove respectively, and the central axes of the third rotating pin mounting hole (83) and the fourth rotating pin mounting hole (84) are overlapped.
As shown in fig. 26 and 29, the first rotating pin (90) is mounted between the first rotating pin mounting hole (80) and the second rotating pin mounting hole (81) through the first bearing (88) and the second bearing (89), and the first link rotating pin mounting hole (71) on the first front caliper body connecting end (72) is in fit connection with the first rotating pin (90); the second rotating pin (91) is installed between the third rotating pin installation hole (83) and the fourth rotating pin installation hole (84) through a third bearing (92) and a fourth bearing (93), and a second connecting rod rotating pin installation hole (79) on the second front brake caliper body connecting end (78) is in matched connection with the second rotating pin (91).
As shown in fig. 32-36, the support is composed of a first support arm (95), a brake caliper body limiting cross rod (19), a second support arm (96) and a support fixing cross rod (99), and the first support arm (95), the brake caliper body limiting cross rod (19) and the second support arm (96) are all of a cuboid structure.
As shown in fig. 32, a bracket first mounting threaded hole (94) is formed in the first bracket arm (95) in the longitudinal direction, and the central axis of the bracket first mounting threaded hole (94) is perpendicular to the front end surface (G7) of the first bracket arm; a second bracket mounting threaded hole (97) is formed in the length direction of the second bracket arm (96), and the central axis of the second bracket mounting threaded hole (97) is perpendicular to the front end face (D7) of the second bracket arm; the first bracket arm (95) is fixedly connected with a brake caliper body limiting surface (A7) of the brake caliper body limiting cross rod (19) through an end surface opposite to the front end surface (G7) of the first bracket arm; the second bracket arm (96) is fixedly connected with a brake caliper body limiting surface (A7) of the brake caliper body limiting cross rod (19) through an end surface opposite to the front end surface (D7) of the second bracket arm; the second bracket arm (96) is positioned on the left end face (B7) side of the brake caliper body limiting cross rod, and the first bracket arm (95) is positioned at one end opposite to the end face (B7); the three components form a U-shaped bracket; the bracket fixing cross rod (99) is of a U-shaped structure, a first bracket hub fixing threaded hole (98) and a second bracket hub fixing threaded hole (100) which are vertical to the front end face (I7) in the central axis are symmetrically arranged on the front end face (I7), and the bracket fixing cross rod can be fixedly connected with a hub through the first bracket hub fixing threaded hole (98), the second bracket hub fixing threaded hole (100) and a bolt; the second bracket arm (96) is fixedly connected with the upper end surface (E7) of the first bracket fixed cross bar through the end surface opposite to the upper end surface (C7) of the second bracket arm; the first bracket arm (95) is fixedly connected with the upper end surface (F7) of the fixed cross bar of the second bracket through the end surface opposite to the upper end surface (H7) of the first bracket arm; the mounting of the rear bracket is shown in fig. 33.
As shown in fig. 7, 30 and 36, the first support rod connecting hole (34) corresponds to the bracket second mounting threaded hole (97) and is fixedly connected with the actuator shell through a bracket second fixing bolt (102); the second support rod connecting hole (39) corresponds to the first mounting threaded hole (94) of the support and is fixedly connected with the actuator shell through a first fixing bolt (101) of the support.
The invention provides a two-way reinforcement type electromechanical brake actuator based on a linear motor, which has the following working principle:
the process of applying the brake and adjusting the magnitude of the braking force is as follows:
when a driver steps on a brake pedal, a motor (1) is electrified, a motor shaft (2) moves forwards, a first-stage boosting block (24) moves forwards correspondingly, under the limiting action of a semicircular guide rail (57) and a semicircular guide groove (36), the first-stage boosting block (24) can only do forward and backward translational motion, a rectangular through groove (54) on the first-stage boosting block (24) pushes a second-stage boosting block (26) to move through a bump (59) on the second-stage boosting block (26), the second-stage boosting block (26) cannot move forwards and backwards but only move leftwards and rightwards under the limiting action of a cylindrical guide rail (25), when the first-stage boosting block (24) moves forwards, the second-stage boosting block (26) can only move rightwards and can only move forwards, a first inclined plane (B4) and a second inclined plane (C4) of the second-stage boosting block both move rightwards and correspondingly push a piston (13) to move through a first cylindrical roller (23) and a second cylindrical roller (62), under the limiting action of the first piston mounting through hole (35) and the second piston mounting through hole (46), the piston (13) can only move forwards, so that the first friction plate (15) is pushed to press against the brake disc (20) to apply braking force to the brake disc.
When the motor shaft (2) moves forwards after the motor (1) is electrified, the first-stage boosting block (24) correspondingly moves forwards, the first lever push shaft (52) and the second lever push shaft (55) correspondingly move forwards, the first lever push shaft (52) moves back and forth in the first lever push shaft installation U-shaped groove (67), the second lever push shaft (55) moves back and forth in the second lever push shaft installation U-shaped groove (69) and correspondingly drives the lever (7) to move, at the moment, the lever (7) can only rotate anticlockwise around the lever shaft (8), the lever (7) drives the second lever connecting rod rotating pin installation through hole (74) and the third lever connecting rod rotating pin installation through hole (77) of the connecting rod (10) to rotate around the lever shaft (8) through the lever connecting rod rotating pin (9), and the second lever connecting rod rotating pin installation through hole (74) and the third lever connecting rod rotating pin installation through hole (77) simultaneously rotate clockwise around the lever connecting rod rotating pin (9), the first connecting rod rotating pin mounting hole (71) and the second connecting rod rotating pin mounting hole (79) of the connecting rod (10) drive the first rotating pin (90) and the second rotating pin (91) to move towards the motor (1) side and simultaneously rotate around the first rotating pin (90) and the second rotating pin (91) respectively; the first rotating pin (90) and the second rotating pin (91) drive the front brake caliper body (18) to move, the first arc guide rail (42) and the second arc guide rail (43) on the front brake caliper body (18) can only move in a translation mode along the first arc groove (85) and the second arc groove (86) under the limiting effect of the second arc groove (86) and the first arc groove (85), and therefore the front brake caliper body (18) can only move in a translation mode towards the side of the brake disc under the driving of the first rotating pin (90) and the second rotating pin (91), so that the second friction plate (17) is driven to press the brake disc (20) to apply braking force to the brake disc.
In the process of applying the brake, a driver can control the magnitude of the output motor force of the motor (1) through the opening degree of the brake pedal, so that the adjustment of the magnitude of the brake force is realized.
The process of reducing braking is as follows:
when the opening of a brake pedal is reduced by a driver, a motor (1) is electrified, a motor shaft (2) moves backwards, a first-stage boosting block (24) moves backwards correspondingly, the first-stage boosting block (24) can only do translational motion under the limiting action of a semicircular guide rail (57) and a semicircular guide groove (36), a rectangular through groove (54) on the first-stage boosting block (24) pulls a second-stage boosting block (26) to move through a bump (59) on the second-stage boosting block (26), the second-stage boosting block (26) cannot move forwards and backwards but only move leftwards and rightwards under the limiting action of a cylindrical guide rail (25), when the first-stage boosting block (24) moves backwards correspondingly, the second-stage boosting block (26) can only move leftwards and forwards, a first inclined plane (B4) and a second inclined plane (C4) of the second-stage boosting block both move leftwards and correspondingly reduce the pressure applied to a piston (13) through a first cylindrical roller (23) and a second cylindrical roller (62), namely, the pressure applied to the brake disc is reduced, and after the pressure applied to the piston (13) by the motor (1) is reduced to 0, under the rotation motion of the brake disc, the first friction plate (15) is separated from the brake disc (20), and the braking pressure applied to the brake disc is reduced to 0.
When the motor shaft (2) moves backwards after the motor (1) is electrified, the first-stage boosting block (24) correspondingly moves backwards, the first lever push shaft (52) and the second lever push shaft (55) correspondingly move backwards, the first lever push shaft (52) moves forwards and backwards in the first lever push shaft installation U-shaped groove (67), the second lever push shaft (55) moves forwards and backwards in the second lever push shaft installation U-shaped groove (69) and correspondingly drives the lever (7) to move, at the moment, the lever (7) can only clockwise rotate around the lever shaft (8), the lever (7) drives the second lever connecting rod rotating pin installation through hole (74) and the third lever connecting rod rotating pin installation through hole (77) of the connecting rod (10) to clockwise rotate around the lever shaft (8) through the lever connecting rod rotating pin (9), and the second lever connecting rod rotating pin installation through hole (74) and the third lever connecting rod rotating pin installation through hole (77) simultaneously rotate around the lever connecting rod rotating pin (9) anticlockwise, the first connecting rod rotating pin mounting hole (71) and the second connecting rod rotating pin mounting hole (79) of the connecting rod (10) drive the first rotating pin (90) and the second rotating pin (91) to move away from the motor (1) side, and simultaneously rotate around the first rotating pin (90) and the second rotating pin (91) respectively; the first rotating pin (90) and the second rotating pin (91) drive the front brake caliper body (18) to move, and the first arc guide rail (42) and the second arc guide rail (43) on the front brake caliper body (18) can only move in a translation mode along the first arc groove (85) and the second arc groove (86) under the limiting action of the second arc groove (86) and the first arc groove (85), so that the front brake caliper body (18) is driven by the first rotating pin (90) and the second rotating pin (91) to move in a translation mode towards the side far away from the brake disc, and the second friction plate (17) is driven to be separated from the brake disc (20); thereby reducing or even deactivating the braking force.

Claims (2)

1. The utility model provides a two-way synchronous reinforcement formula electromechanical brake executor based on linear electric motor which characterized in that: the device mainly comprises a motor, an installation base body, a two-stage force increasing mechanism and a lever force increasing mechanism;
the motor (1) is a linear motor, and an external thread is arranged on a motor shaft (2);
the mounting base body comprises an end cover (4), an actuator shell and a bracket;
the actuator shell comprises a force-increasing mechanism shell (6), a rear brake caliper body (14), a first-stage force-increasing block supporting seat (27), a first arc guide rail (42) and a second arc guide rail (43);
the force-increasing mechanism shell (6) is of a cylindrical structure, and a first piston mounting through hole (35) is formed in the inner end face (D2) of the force-increasing mechanism shell;
a square through hole (41) is formed in the upper end face (B2) of the force-increasing mechanism shell, and two planes of the square through hole (41) are parallel to the motor shaft (2); a first lever shaft mounting hole (48) and a second lever shaft mounting hole (49) are respectively formed in two planes parallel to the motor shaft (2) in the square through hole (41); the lever shaft (8) is fixed between the first lever shaft mounting hole (48) and the second lever shaft mounting hole (49), and the lever shaft (8) is parallel to the upper end surface (B2) of the force increasing mechanism shell and the upper end surface of the first-stage force increasing block (24) and is vertical to the central axis of the motor shaft (2);
a first cylindrical guide rail support (37) and a second cylindrical guide rail support (50) are fixedly installed on two sides of a first piston installation through hole (35) on the inner end surface (D2) of the force-increasing mechanism shell, a cylindrical guide rail (25) is fixedly installed between the first cylindrical guide rail support (37) and the second cylindrical guide rail support (50), and the cylindrical guide rail (25) is parallel to the lever shaft (8); a first-stage boosting block supporting seat (27) is fixedly arranged at the bottom of the inner side of the boosting mechanism shell (6), and a semicircular guide groove (36) is formed in the top of the first-stage boosting block supporting seat (27);
the rear brake caliper body (14) is of a bilaterally symmetrical structure, and a second piston mounting through hole (46) is formed in the middle of the rear brake caliper body; the central axis of the second piston mounting through hole (46) is superposed with the central axis of the first piston mounting through hole (35) and the radiuses of the second piston mounting through hole and the first piston mounting through hole are equal; a first arc guide rail (42) and a second arc guide rail (43) are symmetrically and fixedly arranged on the front end surface (A1) of the rear brake caliper body; the rear end surface (B1) of the rear brake caliper body is fixedly connected with the front end surface (A2) of the force-increasing mechanism shell;
the double-stage force increasing mechanism comprises a first-stage force increasing block (24), a second-stage force increasing block (26), a piston (13), a first cylindrical roller (23) and a second cylindrical roller (62);
the first-stage force-increasing block (24) is of a square structure, a first threaded hole (28) with an axis vertical to the plane is formed in the front end face (A3) of the first-stage force-increasing block, and the motor shaft (2) penetrates through a motor shaft through hole (30) in the end cover (4) and is connected with an internal thread in the first threaded hole (28) in a matched mode through an external thread in the motor shaft (2); a first lever push shaft (52), a first lever push shaft fixing limiting rod (53), a second lever push shaft (55) and a second lever push shaft fixing limiting rod (56) are respectively arranged on the left side surface and the right side surface which are perpendicular to the front end surface (A3) of the first-stage boosting block, the four sides surfaces are cylindrical structures, the central axes of the first lever push shaft (52), the first lever push shaft fixing limiting rod (53), the second lever push shaft fixing limiting rod (55) and the second lever push shaft fixing limiting rod (56) are overlapped, the radiuses of the first lever push shaft fixing limiting rod (53) and the second lever push shaft fixing limiting rod (56) are equal, and the radiuses of the first lever push shaft (52) and the second lever push shaft (55) are larger; the bottom of the first-stage force-increasing block (24) is provided with a semi-cylindrical semi-circular guide rail (57), the semi-circular guide rail (57) is matched with a semi-circular guide groove (36) on the first-stage force-increasing block supporting seat (27), and the first-stage force-increasing block supporting seat (27) is used for supporting the first-stage force-increasing block (24) and plays a role in motion guiding; the top of the first-stage boosting block (24) is provided with more than 2 rectangular through grooves (54), the bottoms of the rectangular through grooves (54) are parallel to the upper and lower planes of the first-stage boosting block (24), and the longitudinal symmetry lines of the grooves are parallel to each other;
the upper end face and the lower end face of the second-stage force-increasing block (26) are parallel to each other, each side face is perpendicular to the upper end face and the lower end face of the second-stage force-increasing block, the lower end face of the second-stage force-increasing block (26) is provided with lugs (59) which are equal to the rectangular through grooves (54) at the tops of the first-stage force-increasing blocks (24) in number and correspond to the positions one by one, each lug (59) is embedded into the corresponding rectangular through groove (54) and can move back and forth in the rectangular through groove (54), the left end face (A4) of the second-stage force-increasing block is provided with a circular through hole (58) with the central axis perpendicular to the end face, the cylindrical guide rail (25) penetrates through the circular through hole (58), the second-stage force-increasing block (26) can move axially along the cylindrical guide rail (25), a first inclined face (B4) of the second inclined face (C4) of the second-stage force-increasing block is respectively contacted with the first cylindrical roller (23) and the, the two are parallel to each other and vertical to the upper and lower end faces of the second-stage boosting block (26);
the main body of the piston (13) is of a circular structure, the section of the main body is rectangular, the front end surface (A5) of the piston is used for fixedly connecting a first friction plate (15), and the rear end surface (B5) of the piston is fixedly connected with a first cylindrical roller support (21), a second cylindrical roller support (22), a third cylindrical roller support (60) and a fourth cylindrical roller support (61); two ends of the first cylindrical roller (23) are respectively supported between the first cylindrical roller support (21) and the second cylindrical roller support (22) through bearings; two ends of the second cylindrical roller (62) are respectively supported between the third cylindrical roller support (60) and the fourth cylindrical roller support (61) through bearings; the central axes of the first cylindrical roller (23) and the second cylindrical roller (62) are parallel to each other and are parallel to the rear end surface (B5) of the piston;
when the braking force is not 0, the first cylindrical roller (23) is in contact with a first inclined surface (B4) of the second-stage force-increasing block, the second cylindrical roller (62) is in contact with a second inclined surface (C4) of the second-stage force-increasing block, two contact lines are parallel to each other and are perpendicular to the central axis of the circular through hole (58) in the whole movement process, and the plane of the two contact lines is perpendicular to the axis of the motor and is parallel to the plane opposite to the first inclined surface (B4) of the second-stage force-increasing block and the second inclined surface (C4) of the second-stage force-increasing block;
the lever force-increasing mechanism comprises a lever (7), a lever shaft (8), a lever connecting rod rotating pin (9) and a connecting rod (10);
the lever (7) is provided with three connecting ends which are respectively a connecting rod connecting end (64), a first lever push shaft connecting end (68) and a second lever push shaft connecting end (70), the lever (7) is of a Y-shaped bilateral symmetry structure, the first lever push shaft connecting end (68) and the second lever push shaft connecting end (70) are positioned on two sides of a bilateral symmetry plane and are mutually symmetrical, and the distance between the inner side of the first lever push shaft connecting end (68) and the inner side of the second lever push shaft connecting end (70) is equal to the distance between the outer end face of the first lever push shaft fixing limiting rod (53) and the outer end face of the second lever push shaft fixing limiting rod (56); the connecting rod connecting end (64) is positioned on the left and right symmetrical plane of the lever (7); a first lever connecting rod rotating pin mounting through hole (65) and a lever shaft mounting through hole (66) are sequentially arranged from outside to inside at the end part of the connecting rod connecting end (64); a first lever push shaft installation U-shaped groove (67) is formed in the end part of the first lever push shaft connecting end (68); a second lever push shaft installation U-shaped groove (69) is formed in the end part of the second lever push shaft connecting end (70); the first lever push shaft (52) is arranged in the first lever push shaft installation U-shaped groove (67) and can move back and forth along the first lever push shaft installation U-shaped groove (67), and the second lever push shaft (55) is arranged in the second lever push shaft installation U-shaped groove (69) and can move back and forth along the second lever push shaft installation U-shaped groove (69); the lever shaft (8) penetrates through the lever shaft mounting through hole (66), and the lever (7) can rotate around the lever shaft (8);
the connecting rod (10) is provided with four connecting ends, the connecting rod (10) is of a Y-shaped bilateral symmetry structure, the first lever connecting end (73) and the second lever connecting end (76) are located at one end, the first lever connecting end (73) and the second lever connecting end (76) are parallel to each other, a groove (75) is formed between the first lever connecting end and the second lever connecting end, the inner end faces of the groove (75) are parallel to each other, the distance between the two inner end faces is equal to the length of the first lever connecting rod rotating pin mounting through hole (65), the first lever connecting end (73) is provided with a second lever connecting rod rotating pin mounting through hole (74), the second lever connecting end (76) is provided with a third lever connecting rod rotating pin mounting through hole (77), and the central axes of the second lever connecting rod rotating pin mounting through hole (74) and the third lever connecting rod rotating; the first front brake caliper body connecting end (72) and the second front brake caliper body connecting end (78) are positioned at the other end of the connecting rod (10), a first connecting rod rotating pin mounting through hole (71) is formed in the end portion of the first front brake caliper body connecting end (72), and a second connecting rod rotating pin mounting through hole (79) is formed in the end portion of the second front brake caliper body connecting end (78);
the lever connecting rod rotating pin (9) sequentially passes through the second lever connecting rod rotating pin mounting through hole (74), the first lever connecting rod rotating pin mounting through hole (65) and the third lever connecting rod rotating pin mounting through hole (77), so that the lever (7) and the connecting rod (10) are hinged;
the front brake caliper body (18) is in a left-right symmetrical structure; the cross section of the side surface is in an inverted L shape; the front brake caliper body (18) comprises a first front brake caliper body support (16), a second front brake caliper body support (82), a first arc groove (85), a second arc groove (86) and a friction plate support plate (87), the friction plate support plate (87) is positioned at the lower part of the front brake caliper body (18), the middle part of the friction plate support plate is provided with a U-shaped groove and is used for fixedly mounting a second friction plate (17), the upper part of the front brake caliper body (18) is provided with the first arc groove (85) and the second arc groove (86), and the first arc groove (85) and the second arc groove (86) are in symmetrical relation relative to the left and right central symmetrical surfaces of the front brake caliper body (18); after installation, the second arc guide rail (43) is arranged in the first arc groove (85), the shape and the size of the second arc guide rail (43) are the same as those of the first arc groove (85), and the second arc guide rail (43) can only freely move back and forth along the first arc groove (85); the first arc guide rail (42) is arranged in the second arc groove (86), the shape and the size of the first arc guide rail (42) are the same as those of the second arc groove (86), and the first arc guide rail (42) can only freely move back and forth along the second arc groove (86); a first front brake caliper body support (16) and a second front brake caliper body support (82) are fixedly arranged at the top of a front brake caliper body (18), the first front brake caliper body support (16) and the second front brake caliper body support (82) are in symmetrical relation relative to the left-right central symmetrical plane of the front brake caliper body (18), the first front brake caliper body support (16) is fixedly arranged above a second circular arc groove (86), the middle of the first front brake caliper body support is provided with a U-shaped groove, two sides of the U-shaped groove are respectively provided with a first rotating pin mounting hole (80) and a second rotating pin mounting hole (81), and the central axes of the first rotating pin mounting hole (80) and the second rotating pin mounting hole (81) are mutually overlapped; the second front brake caliper body support (82) is fixedly arranged above the first arc groove (85), the middle of the second front brake caliper body support is a U-shaped groove, a third rotating pin mounting hole (83) and a fourth rotating pin mounting hole (84) are respectively formed in two sides of the U-shaped groove, and the central axes of the third rotating pin mounting hole (83) and the fourth rotating pin mounting hole (84) are overlapped;
a first rotating pin (90) is installed between the first rotating pin installation hole (80) and the second rotating pin installation hole (81) through a first bearing (88) and a second bearing (89), and a first connecting rod rotating pin installation hole (71) on the first front brake caliper body connecting end (72) is connected with the first rotating pin (90) in a matched mode; the second rotating pin (91) is installed between the third rotating pin installation hole (83) and the fourth rotating pin installation hole (84) through a third bearing (92) and a fourth bearing (93), and a second connecting rod rotating pin installation hole (79) on the second front brake caliper body connecting end (78) is in matched connection with the second rotating pin (91).
2. The linear motor based bi-directional synchronous reinforcement type electromechanical brake actuator as claimed in claim 1, wherein: and a first annular groove (44) and a second annular groove (45) are sequentially arranged on the second piston mounting through hole (46) along the direction from the first friction plate (15) to the force-increasing mechanism shell (6), the first annular groove (44) is used for mounting a dust ring (12), and the second annular groove (45) is used for mounting a sealing ring (11).
CN201910996685.2A 2019-10-19 2019-10-19 Two-way synchronous reinforcement type electromechanical brake actuator based on linear motor Active CN110701221B (en)

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Publication number Priority date Publication date Assignee Title
CN113790228A (en) * 2021-09-13 2021-12-14 山东理工大学 Bidirectional reinforcement type electromechanical brake actuator based on bilateral eccentric wheels
CN113790230A (en) * 2021-09-13 2021-12-14 山东理工大学 Bidirectional reinforcement type electromechanical brake actuator based on linear motor and bilateral eccentric wheels

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CN102906445A (en) * 2010-06-14 2013-01-30 品驰布本泽尔有限责任公司 Adjustment apparatus for a self-energizing braking device, and self-energizing braking device

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JPH10281191A (en) * 1997-04-11 1998-10-20 Toyota Motor Corp Motor-driven type disk brake
CN2474424Y (en) * 2001-03-29 2002-01-30 内蒙古北方重型汽车股份有限公司 Sliding pin type floating brake caliper
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Publication number Priority date Publication date Assignee Title
CN113790228A (en) * 2021-09-13 2021-12-14 山东理工大学 Bidirectional reinforcement type electromechanical brake actuator based on bilateral eccentric wheels
CN113790230A (en) * 2021-09-13 2021-12-14 山东理工大学 Bidirectional reinforcement type electromechanical brake actuator based on linear motor and bilateral eccentric wheels

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