Double-cylinder EMB brake caliper

Abstract

The invention discloses a double-cylinder EMB brake caliper, and belongs to the field of brake calipers. The motor mainly comprises a housing, one end of the housing is fixedly connected with a front end cover, one end of the front end cover is fixedly connected with a rear end cover, a motor and a speed reducer which are fixedly connected with the front end cover are arranged between the front end cover and the rear end cover, and a one-way clutch assembly rotationally connected with the front end cover is arranged between the front end cover and the housing. Synchronous jacking mechanisms rotationally connected with the front end cover are arranged on the two sides of the one-way clutch assembly. A hydraulic system is omitted for a complete brake-by-wire product, the piston is directly controlled by the motor to clamp the brake disc, rapid and intelligent response of the product is achieved, and market requirements in the future are met.

Description

Technical Field

[0001] The present invention belongs to the field of brake calipers, and in particular relates to a dual-cylinder EMB brake caliper. Background Art

[0002] Traditional brake calipers use a master cylinder to pressurize the fluid, sending the pressurized fluid to the wheel-side caliper, which pushes the caliper piston to clamp the brake disc and achieve braking. Traditional hydraulic brake calipers have complex braking systems, a large number of components, and long system response times. With the increasing popularity of autonomous driving, brake calipers with faster response times and greater ease of intelligent and refined control are required. Traditional hydraulic brake calipers are clearly unable to meet these requirements. This application proposes a solution to the aforementioned technical problems. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing technology and provide a dual-cylinder EMB brake caliper. Its fully wire-controlled braking product eliminates the hydraulic system and directly controls the piston to clamp the brake disc through the motor, thereby achieving rapid and intelligent product response and meeting future market needs.

[0004] The dual-cylinder EMB brake caliper includes a cover, one end of the cover is fixedly connected to a front cover, one end of the front cover is fixedly connected to a rear cover, a motor and a reducer fixedly connected to the front cover are provided between the front cover and the rear cover, a one-way clutch assembly rotatably connected to the front cover is provided between the front cover and the cover, and synchronous lifting mechanisms rotatably connected to the front cover are provided on both sides of the one-way clutch assembly; The synchronous lifting mechanism includes a rotating shaft rotatably connected to the front end cover, the front end of the rotating shaft is fixedly connected to the driven gear, the protective plate and the prism one in sequence, the outer side of the prism one is slidably connected to a threaded column, one end of the threaded column is fixedly connected to a push piston, the outer side of the threaded column is threadedly connected to an adjusting screw sleeve, and plane bearings are installed on both axial sides of the adjusting screw sleeve, one of the plane bearings is against the protective plate, and the other plane bearing is against the inside of the cover shell; The one-way clutch assembly includes a prism 2 fixedly connected to the reducer, one end of the prism 2 is fixedly connected to a driving gear, a shaft is rotatably connected in the middle of the driving gear, one end of the shaft is abutted against the inside of the cover, and a clutch sleeve is rotatably connected to the outside of the shaft. The clutch sleeve is provided with a plane bearing 2 fixedly connected to the shaft near one end of the cover, one end of the plane bearing 2 is abutted against the clutch sleeve, and the other end is abutted against the cover.

[0005] Preferably, two through grooves are provided on the outer surface of the clutch sleeve, and the through grooves on both sides are symmetrical about the clutch sleeve, one side of the through groove is opened toward the plane bearing 2, and one side of the inner part of the through groove is fixedly connected to a limiting column 1, and a spring 1 is fixedly connected to the outer side of the limiting column 1, and one end of the spring 1 is fixedly connected to the limiting column, and the limiting column is slidably connected to the through groove, and the clutch sleeve is provided with four groups of arc grooves facing the driving gear, one side of the arc groove is fixedly connected to the limiting column 2, and the other side is a quarter-circular arc groove, the outer side of the limiting column 2 is fixedly connected to the spring 2, and one end of the spring 2 is fixedly connected to a slider, one side of the slider is against the driving gear, and the slider is slidably connected to the arc groove, and a quarter-circular arc groove is provided on one side of the arc groove, and four groups of arc grooves are provided on the surface of the driving gear close to the clutch sleeve, and steel balls are installed between the arc grooves, the slider and the arc grooves.

[0006] Preferably, the long end of the limiting column abuts against the inside of the curved groove, and the curved grooves in the two sets of synchronous jacking mechanisms are symmetrical about the one-way clutch assembly axis.

[0007] Preferably, mounting grooves are fixedly connected on both sides of the adjusting screw sleeve, and the plane bearing is placed in the mounting grooves. A curved groove is provided on the side surface of the adjusting screw sleeve, and the curved groove extends from one end of the adjusting screw sleeve to the other end of the adjusting screw sleeve.

[0008] Preferably, the driving gear is meshingly connected with the driven gear.

[0009] Preferably, the protruding end of the motor is meshed and connected to a synchronous belt, and the synchronous belt is meshed and connected to the protruding end of the reducer.

[0010] Preferably, guide pins are installed on both sides of one end of the cover shell, one end of the guide pin is fixedly connected to a guide pin bolt, the guide pin bolt is fixedly connected to the cover shell, a guide pin protection cover is provided on the outside of the connection between the guide pin bolt and the guide pin, a caliper bracket is installed on the outside of the guide pin, an outer friction plate and an inner friction plate are movably installed on the caliper bracket, and one side of the inner friction plate is against the push piston.

[0011] Preferably, the side of the push piston in contact with the inner friction plate is provided with a pattern for increasing friction.

[0012] Preferably, a prism hole cooperating with the prism is provided inside the threaded column.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention innovatively changes the original hydraulic braking method to a motor-driven one-way clutch assembly and a synchronous lifting mechanism to squeeze the friction plate against the brake disc to reduce the speed by friction. The power provided by the motor first passes through the reducer to convert high speed and low torque into low speed and high torque, and then is transmitted to the one-way clutch assembly, and then from the one-way clutch assembly to the synchronous lifting mechanism, pushing the friction plate to squeeze the brake disc for braking.

[0014] 2. The two pistons of the present invention achieve clearance compensation through the one-way clutch assembly, thereby ensuring that the clearance with the friction plate is consistent with the wear and deformation of the friction plate, and no uneven wear occurs.

[0015] 3. When the slider of the one-way clutch assembly rotates along the direction of the spring, the torque does not effectively compress the spring, but the steel ball rotates the arc groove and the arc groove as a whole to transmit the rotational torque, thereby driving the adjusting screw sleeves on both sides to rotate through the two limit columns installed on the clutch sleeve to supplement the braking clearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the external structure of the present invention; Figure 2 It is a cross-sectional view of the internal structure of the present invention; Figure 3 This is an exploded view of the structure of the driving part of the present invention; Figure 4 Schematic diagram of the structure of the driving part of the present invention; Figure 5 It is a structural exploded diagram of the synchronous jacking mechanism of the present invention; Figure 6 It is a structural diagram of the adjusting screw sleeve; Figure 7 This is the structural exploded diagram of the one-way clutch assembly; Figure 8 It is a structural diagram of the clutch sleeve.

[0017] In the figure, 1. motor; 2. synchronous belt; 3. reducer; 4. front end cover; 5. synchronous lifting mechanism; 501. rotating shaft; 502. driven gear; 503. protective plate; 504. prism 1; 505. plane bearing 1; 506. adjusting screw sleeve; 5061. curved groove; 5062. mounting groove; 507. threaded column; 508. push piston; 509. prism hole; 6. one-way clutch assembly; 601. plane bearing 2; 602. clutch sleeve; 6021. through groove; 6022. limit column 1; 6023. limit column 2; 6024. arc groove; 603, limit column; 604, spring 1; 605, slider; 606, spring 2; 607, drive gear; 6071, arc groove; 6072, steel ball; 608, prism 2; 609, shaft; 7, rear end cover; 8, cover; 9, outer friction plate; 10, caliper bracket; 11, inner friction plate; 12, guide pin bolt; 13, guide pin protective cover; 14, guide pin. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings: The directional terms used in the detailed description are intended solely to facilitate understanding of the technical solutions described herein by those skilled in the art based on the visual orientation shown in the accompanying drawings. Unless otherwise specified or limited, the terms "dispose," "install," and "connect" are to be interpreted broadly, and those skilled in the art will understand their specific meanings within the present invention based on the specific circumstances.

[0019] like Figures 1 to 8 As shown, a dual-cylinder EMB brake caliper includes a housing 8, which secures most of the components within it. One end of the housing 8 is fixedly connected to a front end cover 4, which in turn is fixedly connected to a rear end cover 7. A motor 1 and a reducer 3, both fixedly connected to the front end cover 4, are located between the front and rear ends of the housing 7. The motor 1 provides power for braking, and the reducer 3 converts high speed into high torque. A one-way clutch assembly 6, rotatably connected to the front end cover 4, is located between the front end cover 4 and the housing 8. Synchronous lifting mechanisms 5, both rotatably connected to the front end cover 4, are located on either side of the one-way clutch assembly 6. The synchronous lifting mechanism 5 includes a rotating shaft 501 rotatably connected to the front end cover 4, the front end of the rotating shaft 501 is fixedly connected to the driven gear 502, the protective plate 503 and the prism 1 504 in sequence, the outer side of the prism 1 504 is slidably connected to a threaded column 507, one end of the threaded column 507 is fixedly connected to a push piston 508, the outer side of the threaded column 507 is threadedly connected to an adjusting screw sleeve 506, and the adjusting screw sleeve 506 is installed with plane bearings 1 505 on both axial sides, one of the plane bearings 1 505 is against the protective plate 503, and the other plane bearing 1 505 is against the inside of the cover shell 8; like Figures 7 and 8As shown, the one-way clutch assembly 6 includes a second prism 608 fixedly connected to the reducer 3. One end of the second prism 608 is fixedly connected to the drive gear 607. A shaft 609 is rotatably connected to the middle of the drive gear 607. One end of the shaft 609 abuts against the interior of the housing 8. The outer side of the shaft 609 is rotatably connected to the clutch sleeve 602. The end of the clutch sleeve 602 near the housing 8 is provided with a second flat bearing 601 fixedly connected to the shaft 609. One end of the second flat bearing 601 abuts against the clutch sleeve 602, and the other end abuts against the housing 8. The drive gear 607 is in meshing transmission connection with the driven gear 502. The drive gear 607 provides power to the driven gear 502, which drives the piston 508 forward.

[0020] like Figure 5 As shown, two through slots 6021 are provided on the outer surface of the clutch sleeve 602, and the through slots 6021 on both sides are symmetrical about the clutch sleeve 602. One side of the through slot 6021 is opened toward the plane bearing 2 601. One side of the inner part of the through slot 6021 is fixedly connected to a limiting post 1 6022, and a spring 1 604 is fixedly connected to the outer side of the limiting post 1 6022. One end of the spring 1 604 is fixedly connected to the limiting post 603. The limiting post 603 is slidably connected to the through slot 6021, and the end of the limiting post 603 that contacts the through slot 6021 is rectangular to prevent rotation. The clutch sleeve 602 has four sets of arc grooves 6024 on the end facing the drive gear 607. One side of the arc grooves 6024 is fixedly connected to the second limit post 6023, and the other side is a quarter-circular arc groove. The outer side of the second limit post 6023 is fixedly connected to the second spring 606. One end of the second spring 606 is fixedly connected to the slider 605. One side of the slider 605 abuts against the drive gear 607. The slider 605 is slidably connected to the arc groove 6024. One side of the arc groove 6024 has a quarter-circular arc groove. The surface of the drive gear 607 near the clutch sleeve 602 has four sets of arc grooves 6071. Steel balls 6072 are installed between the arc grooves 6071, the slider 605, and the arc grooves 6024. The arc grooves 6071, the slider 605, and the arc grooves 6024 cooperate to enclose the steel balls 6072. The curved grooves 5061 in the two sets of synchronous lifting mechanisms 5 are symmetrical about the one-way clutch assembly 6. The reason for this arrangement is that when the driving gear 607 rotates in one direction, the driven gears 502 on both sides rotate in the same direction. When the driven gears 502 rotate in the same direction, the curved grooves 5061 need to be symmetrical about the one-way clutch assembly 6 in order to enable the push piston 508 to move forward synchronously.

[0021] like Figure 6Shown, adjusting screw sleeve 506 both sides are fixedly connected with mounting groove 5062, and plane bearing 1 505 is placed in mounting groove 5062, and plane bearing 1 505 is played a protective effect, and when adjusting screw sleeve 506 rotates, friction can be reduced, and practical life is increased.Adjusting screw sleeve 506 side surfaces offer curved groove 5061, and curved groove 5061 is opened to the other end of adjusting screw sleeve 506 from one end of adjusting screw sleeve 506, and limiting column 603 long ends and curved groove 5061 insides are counteracted.Motor 1 extended end meshing transmission is connected with synchronous belt 2, and synchronous belt 2 is connected with the extended end meshing transmission of speed reducer 3, and the effect of using synchronous belt 2 is that the rotating speed that motor 1 transmits is passed to in the process of speed reducer 3, avoids causing and can not transmit in time because of common belt slippage. Guide pins 14 are mounted on either side of one end of the housing 8. Guide pin bolts 12 are fixedly connected to one end of the guide pins 14. Guide pin bolts 12 are fixedly connected to the housing 8. A guide pin protection cover 13 is located outside the connection between guide pin bolts 12 and guide pin 14. A caliper bracket 10 is mounted outside the guide pin 14. An outer friction plate 9 and an inner friction plate 11 are movably mounted on the caliper bracket 10. One side of the inner friction plate 11 abuts against the push piston 508. The side of the push piston 508 that contacts the inner friction plate 11 is patterned to increase friction. A prism hole 509 is located within the threaded column 507, which mates with the prism 1 504, allowing the threaded column 507 to rotate synchronously.

[0022] Those skilled in the art can use existing technologies they know, such as installing corresponding mechanical limit switches or photoelectric sensors to limit the specified positions of each actuator during the following action process; in order to achieve automated operation, the present invention can use numerical control technology or PLC to control the action of each actuator.

[0023] Working process: When the car brakes, the car outputs an electrical signal to drive the motor 1 to rotate. The rotation of the motor 1 drives the reducer 3 to rotate through the synchronous belt 2. The reducer 3 converts the high speed and low torque output by the motor into high torque and low speed, and outputs it to the one-way clutch assembly 6. The driving gear 607 in the one-way clutch assembly 6 rotates, driving the driven gear 502 in the synchronous lifting mechanism 5 to rotate. When the driven gear 502 rotates, it drives the threaded column 507 and the pushing piston 508 in front of the threaded column 507 to rotate, and the adjusting screw sleeve 506 located on the outside of the pushing piston 508 rotates, and the side of the adjusting screw sleeve 506 is adjusted. The curved groove 5061 is pushed by the limiting column 603 in the one-way clutch assembly 6, pushing the piston 508 toward the inner friction plate 11, so that the inner friction plate 11 and the outer friction plate 9 squeeze the brake disc to decelerate. When the deceleration is completed, the driving motor 1 reverses, driving the piston 508 to move backward. When the brake disc rotates, the inner friction plate 11 and the outer friction plate 9 are displaced to both sides by centrifugal force. The retaining springs on the inner friction plate 11 and the outer friction plate 9 are supported and fixed by the caliper bracket 10, so that the inner friction plate 11 and the outer friction plate 9 are away from the brake disc. This part is an existing mature structure and will not be described in detail.

[0024] One-way clutch assembly 6 working principle: Figure 7 When the driving gear 607 shown rotates in the direction of the slider 605 and the second spring 606, and the torque does not effectively compress the second spring 606, the steel ball 6072 rotates the driving gear 607 and the clutch sleeve 602 as a whole to transmit the rotational force. When the resistance is too large, the steel ball squeezes the second spring 606 to rotate the steel ball, and the rotational force of the driving gear 607 cannot be transmitted to the clutch sleeve 602, so that the upper part of the one-way clutch assembly 6 moves (the clutch sleeve 602 part) and the lower part is stationary (the driving gear 607 part); when the driving gear 607 moves in the opposite direction of the stretching direction of the second spring 606, since the steel ball is at the end ball position of the clutch sleeve 602, the driving gear 607 is also at the end ball position of the channel, so that the steel ball can rotate freely, so that the return of the driving gear 607 will not drive the clutch sleeve 602 to return.

[0025] Finally, although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A dual-cylinder EMB brake caliper, comprising a housing (8), characterized in that: One end of the cover (8) is fixedly connected to a front end cover (4), and one end of the front end cover (4) is fixedly connected to a rear end cover (7). A motor (1) and a reducer (3) fixedly connected to the front end cover (4) are provided between the front end cover (4) and the rear end cover (7). A one-way clutch assembly (6) rotatably connected to the front end cover (4) is provided between the front end cover (4) and the cover (8). Synchronous lifting mechanisms (5) rotatably connected to the front end cover (4) are provided on both sides of the one-way clutch assembly (6). The synchronous lifting mechanism (5) includes a rotating shaft (501) rotatably connected to the front end cover (4), the front end of the rotating shaft (501) is fixedly connected to a driven gear (502), a protective plate (503) and a prism (504) in sequence, the outer side of the prism (504) is slidably connected to a threaded column (507), one end of the threaded column (507) is fixedly connected to a push piston (508), the outer side of the threaded column (507) is threadedly connected to an adjusting screw sleeve (506), and plane bearings (505) are installed on both axial sides of the adjusting screw sleeve (506), one of the plane bearings (505) is against the protective plate (503), and the other plane bearing (505) is against the inside of the cover (8); The one-way clutch assembly (6) includes a second prism (608) fixedly connected to the reducer (3), one end of the second prism (608) is fixedly connected to a driving gear (607), the middle of the driving gear (607) is rotatably connected to a shaft (609), one end of the shaft (609) is against the inside of the cover (8), the outer side of the shaft (609) is rotatably connected to a clutch sleeve (602), and the clutch sleeve (602) is provided with a second plane bearing (601) fixedly connected to the shaft (609) at one end close to the cover (8), one end of the second plane bearing (601) is against the clutch sleeve (602), and the other end is against the cover (8).

2. The dual-cylinder EMB brake caliper according to claim 1, characterized in that: Two through grooves (6021) are provided on the outer surface of the clutch sleeve (602), and the through grooves (6021) on both sides are symmetrical with respect to the clutch sleeve (602). One side of the through groove (6021) is opened toward the plane bearing 2 (601), and one side of the inner part of the through groove (6021) is fixedly connected to the limiting column 1 (6022), and the outer side of the limiting column 1 (6022) is fixedly connected to the spring 1 (604), and one end of the spring 1 (604) is fixedly connected to the limiting column (603), and the limiting column (603) is slidably connected to the through groove (6021). Four groups of arc grooves (6024) are provided on one end of the clutch sleeve (602) facing the driving gear (607), and one side of the inner part of the arc groove (6024) is fixedly connected to the limiting column (603). The second limiting column (6023) is connected to the second limiting column, and the other side is a quarter-circular arc groove. The outer side of the second limiting column (6023) is fixedly connected to the second spring (606). One end of the second spring (606) is fixedly connected to the slider (605). One side of the slider (605) is against the driving gear (607). The slider (605) is slidably connected to the arc groove (6024). One side of the arc groove (6024) is provided with a quarter-circular arc groove. Four groups of arc grooves (6071) are provided on the surface of the side of the driving gear (607) close to the clutch sleeve (602). Steel balls (6072) are installed between the arc grooves (6071), the slider (605) and the arc groove (6024).

3. The dual-cylinder EMB brake caliper according to claim 2, characterized in that: The long end of the limiting column (603) abuts against the inside of the curved groove (5061), and the curved grooves (5061) in the two sets of synchronous lifting mechanisms (5) are symmetrical about the axis of the one-way clutch assembly (6).

4. The dual-cylinder EMB brake caliper according to claim 1, characterized in that: Mounting grooves (5062) are fixedly connected on both sides of the adjusting screw sleeve (506). The plane bearing (505) is placed in the mounting groove (5062). A curved groove (5061) is provided on the side surface of the adjusting screw sleeve (506). The curved groove (5061) is opened from one end of the adjusting screw sleeve (506) to the other end of the adjusting screw sleeve (506).

5. The dual-cylinder EMB brake caliper according to claim 1, characterized in that: The driving gear (607) is meshed and connected to the driven gear (502).

6. The dual-cylinder EMB brake caliper according to claim 1, characterized in that: The extended end of the motor (1) is meshed and connected to a synchronous belt (2), and the synchronous belt (2) is meshed and connected to the extended end of the reducer (3).

7. The dual-cylinder EMB brake caliper according to claim 1, characterized in that: Guide pins (14) are installed on both sides of one end of the cover (8), and one end of the guide pin (14) is fixedly connected to a guide pin bolt (12). The guide pin bolt (12) is fixedly connected to the cover (8), and a guide pin protection cover (13) is provided on the outside of the connection between the guide pin bolt (12) and the guide pin (14). A caliper bracket (10) is installed on the outside of the guide pin (14), and an outer friction plate (9) and an inner friction plate (11) are movably installed on the caliper bracket (10), and one side of the inner friction plate (11) is against the push piston (508).

8. The dual-cylinder EMB brake caliper according to claim 7, characterized in that: The side of the push piston (508) that contacts the inner friction plate (11) is provided with a pattern for increasing friction.

9. The dual-cylinder EMB brake caliper according to claim 1, characterized in that: The threaded column (507) is provided with a prism hole (509) inside thereof to cooperate with the prism 1 (504).

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