Brake caliper assembly, brake system with brake caliper assembly and vehicle

Abstract

The utility model relates to the field of brake calipers, in particular to a brake caliper assembly, a brake system with the brake caliper assembly and a vehicle, the brake caliper assembly comprises a brake caliper, a brake pad and an actuator, and the brake caliper comprises a caliper body; the caliper body is internally provided with at least one planetary roller lead screw mechanism capable of converting rotary motion into linear motion so as to enable the brake pad to do linear motion. The planetary roller lead screw mechanism comprises a lead screw shaft, a nut and a roller; the pin roller is connected to the lead screw shaft in a sleeved mode, and the nut is connected to the pin roller in a sleeved mode. The actuator controls the nut to rotate; the nut can drive the lead screw shaft to do linear motion through the pin roller. A traditional ball screw mechanism is replaced by the planetary roller screw mechanism, the axial rigidity of a motion conversion mechanism in a traditional brake caliper assembly can be increased, the axial load bearing capacity of the traditional brake caliper assembly can be increased, in addition, traditional balls are replaced by the rollers, and the problems that a ball raceway is prone to abrasion and large in abrasion loss can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of brake caliper, specifically is a brake caliper assembly and the brake system and vehicle with the brake caliper assembly. BACKGROUND

[0002] At present, EMB electronic brake caliper is directly arranged at the wheel end, replaces the original hydraulic brake system, uses the wire circuit to replace the hydraulic pipeline, realizes the transmission from the pedal signal to the actuator through the electronic signal, has the characteristics such as corresponding fast, high efficiency, small volume, light quality.

[0003] The motion conversion mechanism is an important part of the EMB system, which converts rotary motion into linear motion to push the piston to brake.

[0004] In the prior art, the motion conversion mechanism is a common linear transmission element ball screw, which is composed of a ball screw with balls and a nut, although it has the characteristics of simple structure and mature processing technology, but the transmission precision is not high, and if high torque and high load need to be borne, a larger volume is needed, which cannot meet the requirements of some high-speed heavy-load application occasions; in addition, the balls on the ball screw guide rail are easy to wear, and its maintenance is difficult, which is not conducive to the stability and economy of long-term use.

[0005] For example, the content disclosed in patent 202211223473.9 - a kind of actuator and electromechanical brake caliper.

[0006] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing brake caliper assembly. INVENTION CONTENTS

[0007] The utility model aims at providing a brake caliper assembly with high transmission efficiency and precision, and suitable for high-speed heavy load.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A brake caliper assembly, comprising a brake caliper, a brake pad and an actuator, the brake caliper comprising a caliper body; at least one set of planetary roller screw mechanism capable of converting rotary motion into linear motion to make the brake pad move linearly is arranged in the caliper body;

[0010] The planetary roller screw mechanism comprises a screw shaft, a nut and a roller;

[0011] The roller is sleeved on the screw shaft, and the nut is sleeved on the roller;

[0012] The actuator controls the rotation of the nut; the nut can drive the screw shaft to move linearly through the roller.

[0013] The caliper body is provided with a cylinder hole; the planetary roller screw mechanism is inserted into the cylinder hole; the screw shaft in the planetary roller screw mechanism is arranged in the cylinder hole and extends to the brake pad or / and the actuator.

[0014] The planetary roller screw mechanism further comprises an anti-rotation component, the anti-rotation component comprises an anti-rotation element connected to the screw shaft; the anti-rotation element can limit the rotation of the screw shaft; the anti-rotation element is connected to the actuator or the caliper body and connected to the screw shaft.

[0015] The screw shaft comprises a shaft body, the shaft body is provided with an anti-rotation groove, and the anti-rotation element is inserted into the anti-rotation groove.

[0016] The actuator is connected to the nut through a torque transmission element; the torque transmission element can drive the nut to rotate.

[0017] The nut comprises a nut body; the nut body is provided with a connecting ring groove, the connecting ring groove is arranged at one end of the nut body close to the brake pad; the torque input element in the torque transmission element is arranged in the connecting ring groove.

[0018] The screw shaft is provided with a base at one end close to the brake pad; the screw shaft and the base are connected in a fixed or detachable manner; the relative position of the screw shaft and the base is fixed during work.

[0019] The caliper body is provided with a lower opening; the lower opening is communicated with the cylinder hole; the planetary roller screw mechanism passes through the lower opening and is connected to the brake pad; the caliper body is further provided with a lateral opening, and the torque transmission element passes through the lateral opening and is connected to the nut.

[0020] The lower opening is provided with a positioning ring plate, and the positioning ring plate is sleeved on the planetary roller screw mechanism.

[0021] The brake caliper assembly further comprises a bearing mechanism arranged in the cylinder hole; the bearing mechanism comprises a thrust bearing arranged on the nut.

[0022] The thrust bearing comprises a first thrust bearing and a second thrust bearing; the first thrust bearing and the second thrust bearing are distributed at two ends of the nut, the first thrust bearing is arranged at one end of the nut away from the brake pad, and the second thrust bearing is arranged between the torque input element and the positioning ring plate.

[0023] The bearing mechanism further comprises a radial bearing; the side surface of the nut is fitted with the inside of the cylinder hole through the radial bearing.

[0024] The brake caliper assembly further comprises an identification unit arranged in the cylinder hole; the identification unit comprises a pressure identification unit arranged in the cylinder hole; the pressure identification unit is arranged between the planetary roller screw mechanism and the inner wall of the cylinder hole.

[0025] The planetary roller screw mechanism is one of a differential planetary roller screw mechanism, a standard planetary roller screw mechanism, a reverse planetary roller screw mechanism or a circulating planetary roller screw mechanism.

[0026] A brake system comprising the brake caliper assembly.

[0027] A vehicle comprising the brake system.

[0028] The brake caliper assembly has the advantages that:

[0029] The utility model discloses a brake caliper assembly, brake system and vehicle with the brake caliper assembly.

[0030] The utility model discloses a planetary roller screw mechanism replaces traditional ball screw mechanism, can increase the axial rigidity of the motion conversion mechanism in traditional brake caliper assembly, increases the axial load bearing capacity of traditional brake caliper assembly, in addition, the roller replaces traditional ball, can avoid the ball screw ball and raceway contact as point contact, and the ball raceway is easy to wear, and the wear amount is big, and the service life is relatively shorter.

[0031] In other words, the utility model replaces ball with roller, increases the transmission efficiency and precision of motion conversion mechanism, and is wear -resisting, long in service life, and is suitable for high -speed heavy -duty linear application place.

[0032] In addition, the utility model discloses a rotating piece with nut, and the screw shaft is a translation piece, because the screw shaft can pass through the caliper body and enter the actuator when arranging, so that the space inside the controller can be fully utilized, thereby the axial space can be utilized in parallel, and the axial dimension of the caliper assembly can be shortened.

[0033] In addition, the utility model can increase the effective stroke of the piston due to the relative increase of the screw shaft, so that the thicker friction plate can be adapted, the application range of the utility model is improved, the service life of the friction plate in the brake caliper assembly is increased, and the part replacement cost of the user is reduced.

[0034] In addition, in the utility model, the translation piece is the screw shaft, and the diameter of the screw shaft is small, so that the diameter of the thrust bearing and the diameter of the cylinder hole can be reduced, thereby the radial dimension of the caliper assembly is reduced, and the arrangement on the whole vehicle is more beneficial. BRIEF DESCRIPTION OF DRAWINGS

[0035] The contents expressed by each drawing of the utility model specification and the marks in the drawing are briefly described as follows:

[0036] Figure 1 It is the structure schematic view of the utility model embodiment one.

[0037] Figure 2 It is the structure schematic view of the utility model embodiment two.

[0038] Figure 3 It is the structure schematic view when the pressure identification unit is equipped in the utility model embodiment one.

[0039] Figure 4 It is the structure schematic view when the pressure identification unit is equipped in the utility model embodiment two.

[0040] The mark in above-mentioned drawing is all:

[0041] 1, controller;1-1, controller housing, 2, input element;3, torque transmission element;4, caliper body;4-1, cylinder hole, 5, anti-rotation element;6, first thrust bearing;7, radial bearing;8, planetary roller screw mechanism;8a, screw shaft;8a1, anti-rotation groove, 8b, roller;8c nut;9, torque input element;10, lower opening, 11, second thrust bearing;12, positioning ring plate;13, sealing cover;14, inner brake pad;15, brake disc;16, outer brake pad;17, pressure identification unit, 18 lateral opening. Specific implementation

[0042] The specific implementation of the utility model is further explained in detail by the description of the optimal embodiment with reference to the drawings.

[0043] A kind of brake caliper assembly, including brake caliper, brake pad and executor, the brake caliper includes caliper body 4;At least one set of planetary roller screw mechanism 8 that can convert rotary motion into linear motion to make brake pad linear motion is equipped in the caliper body 4;The planetary roller screw mechanism 8 includes screw shaft 8a, nut 8c and roller 8b;The roller 8b is sleeved on screw shaft 8a, and the nut 8c is sleeved on roller 8b;Executor controls the rotation of nut 8c;The nut 8c can drive screw shaft 8a linear motion by roller 8b;The utility model replaces traditional ball screw mechanism by planetary roller screw mechanism 8, can increase the axial rigidity of motion conversion mechanism in traditional brake caliper assembly, increase the axial load carrying capacity of traditional brake caliper assembly, in addition, roller 8b replaces traditional ball, can avoid ball screw ball and raceway contact as point contact, ball raceway is easy to wear, wear amount is large, and the service life is relatively short.

[0044] In other words, the utility model discloses a replace the ball with the roller 8b, increase the transmission efficiency and precision of motion conversion mechanism, wear -resisting, long service life simultaneously, be applicable to high -speed heavy load linear application place.

[0045] The utility model discloses a brake caliper assembly mainly is a floating type caliper assembly.

[0046] The utility model discloses a replace the traditional ball screw mechanism with the planetary roller screw mechanism 8, can increase the load of the longitudinal bearing of brake caliper assembly, and can prolong the service life of brake caliper.

[0047] Specifically, the utility model discloses a brake caliper assembly mainly includes brake caliper, brake pad and actuator, and the brake caliper is the main body structure of brake caliper assembly, and the actuator includes input element 2, controller 1 and torque transmission element 3, torque transmission element 3 includes torque input element 9, torque input element 9 can be a gear structure, for example input gear, of course can be other input parts, and the rotation of nut 8c can be used in the utility model.

[0048] Meanwhile, the brake pad is the friction plate in the utility model, and is generally divided into inner brake pad 14 and outer brake pad 16 based on different arrangement positions, and is arranged on the opposite sides of brake disc 15 respectively, and the subsequent clamping and friction of inner brake pad 14 and outer brake pad 16 to brake disc 15 realizes the brake operation of brake disc 15.

[0049] In addition, the planetary roller screw mechanism 8 in the utility model is the motion rotation mechanism in the traditional brake caliper assembly.

[0050] The planetary roller screw mechanism 8 in the utility model includes screw shaft 8a, nut 8c and roller 8b, the roller 8b is sleeved on the screw shaft 8a, the nut 8c is sleeved on the roller 8b, the actuator controls the rotation of nut 8c, the nut 8c can drive the screw shaft 8a to move linearly through the roller 8b, the torque input element 9 is connected on the nut 8c, and the nut 8c rotates under the driving of the torque input element 9, at this time, the nut 8c is a rotating part, and the screw shaft 8a is a translating part.

[0051] Meanwhile, the brake caliper includes caliper body 4 in the utility model, and the caliper body 4 is the main body structure of brake caliper, and is generally referred to as the structure above the claw, at least one set of planetary roller screw mechanism 8 that can convert rotary motion into linear motion to make brake pad move linearly is arranged in the caliper body 4, based on the statement, it can be known that the utility model can realize the use of brake caliper assembly of different cylinder bodies, such as double-cylinder brake caliper assembly, through the different arrangement quantity of planetary ball screw mechanism.

[0052] In addition, in order to ensure the linearity of the movement of the screw shaft 8a, the planetary roller screw mechanism 8 further comprises an anti-rotation component in the utility model.

[0053] The anti-rotation component comprises an anti-rotation element 5 connected to the screw shaft 8a, and the anti-rotation element 5 can limit the rotation of the screw shaft 8a. The screw shaft 8a comprises a shaft body, and an anti-rotation groove 8a1 is arranged on the shaft body. The anti-rotation element 5 is inserted into the anti-rotation groove 8a1.

[0054] Meanwhile, the anti-rotation element 5 is connected to the actuator or the caliper body 4 and connected to the screw shaft 8a.

[0055] Different technical solutions are formed based on different connection and arrangement of the anti-rotation element 5.

[0056] The anti-rotation element 5 can be directly connected to the caliper body 4 in the utility model.

[0057] Based on such a connection mode, the anti-rotation element 5 can be directly connected to the caliper body 4, which facilitates the pre-installation and positioning of the operation conversion mechanism and better ensures the accuracy of the assembly position of the operation conversion mechanism.

[0058] The anti-rotation element 5 can be connected to the actuator, which is connected to the controller 1 in the actuator.

[0059] Further, the caliper body 4 is provided with a cylinder hole 4-1.

[0060] In the utility model, the planetary roller screw mechanism 8 is inserted in the cylinder hole 4-1; The screw shaft 8a in the planetary roller screw mechanism 8 is arranged in the cylinder hole 4-1 and extends to the brake piece or / and actuator; Based on such arrangement, the arrangement mode and size of the screw shaft 8a can be selected as required; When subsequently arranged, the screw shaft can pass through the caliper body 4 and enter the actuator, so that the space inside the controller 1 can be fully utilized, thereby the axial space can be utilized in parallel, and the axial size of the caliper assembly can be shortened.

[0061] In addition, when subsequently used, the size of the screw shaft 8a can be conveniently changed, for example, the diameter of the screw shaft 8a is reduced, the diameter of the thrust bearing and the diameter of the cylinder hole 4-1 can be reduced, so that the radial size of the caliper assembly is reduced, and the arrangement on the whole vehicle is more convenient.

[0062] Further, in the utility model, the actuator is connected with the nut 8c through the torque transmission element 3; The torque transmission element 3 can drive the nut 8c to rotate; The torque transmission element 3 further comprises a torque input element 9, which can be a gear structure, for example, an input gear, and of course can also be other input elements, and the essence is that the torque input element 9 can drive the nut 8c to rotate and can be used in the utility model; The utility model is convenient for the connection between the actuator and the nut 8c through the arrangement of the torque transmission element 3.

[0063] Meanwhile, in the utility model, the nut 8c comprises a nut 8c body; The nut 8c body is provided with a connecting ring groove, and the connecting ring groove is arranged at one end of the nut 8c body close to the brake piece; The torque input element 9 in the torque transmission element 3 is arranged in the connecting ring groove; In the utility model, the nut 8c body is the main structure of the nut 8c, and the connecting ring groove is arranged on the outside of the nut 8c body, which forms a ring-shaped stepped platform, the utility model can not only reduce the overall quality of the nut 8c through the arrangement of the connecting ring groove, but also facilitate the axial limiting ability between the torque input element 9 and the nut 8c through the arrangement of the stepped platform, so that the torque input element 9 is prevented from moving axially on the nut 8c; Meanwhile, the arrangement and placement of the torque input element 9 are facilitated, and the transverse space occupied by the torque input element 9 is reduced.

[0064] Meanwhile, in the utility model, the torque input element 9 can be an input gear structure with internal teeth, and driving teeth are arranged on the outside of the nut 8c, the driving teeth on the nut 8c are meshed with the internal teeth on the input gear, so that the connection between the nut 8c and the torque input element 9 is realized.

[0065] Of course, a more simple connection mode is that the torque input element 9 is fixedly connected with the nut 8c, and the fixed connection mode is selected as required.

[0066] Further, in the utility model, the screw rod shaft 8a is equipped with the base 19 near one end of the brake piece, the base 19 is used as the function of a piston, and is combined with the inner brake piece 14 subsequently, is pushed by the screw rod shaft 8a, realizes the extrusion of the inner brake piece 14, and further cooperates with the outer brake piece 16 to clamp the brake disc 15.

[0067] Meanwhile, in the utility model, the screw rod shaft 8a is connected with the base 19 using fixed or detachable connection mode, the screw rod shaft 8a of the utility model can be connected with the base 19 using fixed connection mode, and the setting can guarantee the connection strength of the connection of the screw rod shaft 8a and the base 19.

[0068] And using detachable connection mode can facilitate the assembly of the brake caliper assembly during subsequent use, and the mutual replacement between the screw rod shaft 8a and the base 19 can be carried out according to the needs during subsequent use, so that the application range of the utility model is improved, and the screw rod shaft 8a and the base 19 can be connected through fixing screws or bolts in the utility model, and of course can be connected using clamping and other modes.

[0069] Further, in the utility model, the caliper body 4 is equipped with a lower opening 10, the lower opening 10 is communicated with the cylinder hole 4-1, the setting of the lower opening 10 facilitates the connection of the screw rod shaft 8a and the inner brake piece 14 by passing through the caliper body 4 during subsequent use, the planetary roller screw mechanism 8 of the utility model is connected with the brake piece by passing through the lower opening 10, specifically, the screw rod shaft 8a in the planetary roller screw mechanism 8 is connected with the base 19 by passing through the lower opening 10, and then the base 19 is connected with the inner brake piece 14.

[0070] Meanwhile, in the utility model, the caliper body 4 is also equipped with a lateral opening 18, the torque transmission element 3 is connected with the nut 8c by passing through the lateral opening 18, the lateral opening 18 plays a side communication role, and facilitates the connection of the torque transmission element 3 and the nut 8c in the cylinder hole 4-1 through the lateral opening 18 during subsequent use.

[0071] Further, in the utility model, the lower opening 10 is equipped with a positioning ring plate 12, and the positioning ring plate 12 is sleeved on the planetary roller screw mechanism 8, the positioning ring plate 12 is embedded in the lower opening 10, and is equivalent to being connected in the lower opening 10, the setting of the positioning ring plate 12 can support the planetary roller screw mechanism 8, and guarantee the stability of the arrangement of the planetary roller screw mechanism 8 in the cylinder hole 4-1.

[0072] Meanwhile, in the utility model, the positioning ring plate 12 can also play a good supporting and limiting role subsequently, and guarantee the stability of the position of the second thrust bearing 11.

[0073] Further, the brake caliper assembly in the utility model further includes bearing mechanism arranged in the cylinder hole 4-1; the arrangement of the bearing mechanism can not only ensure the stability of the arrangement of the planetary roller screw mechanism 8 in the caliper body 4, but also can reduce the friction between the planetary roller screw mechanism 8 and the inside of the cylinder hole 4-1.

[0074] The bearing mechanism in the utility model includes the thrust bearing arranged on the nut 8c; the thrust bearing mainly bears the reverse thrust of the subsequent clamping force.

[0075] The thrust bearing in the utility model includes the first thrust bearing 6 and the second thrust bearing 11; the first thrust bearing 6 and the second thrust bearing 11 are distributed at both ends of the nut 8c, the first thrust bearing 6 is arranged at the end of the nut 8c away from the brake pad, and the second thrust bearing 11 is arranged between the torque input element 9 and the positioning ring plate 12; in the utility model, the first thrust bearing 6 is the first thrust bearing 6, which is mainly arranged at the end of the nut 8c close to the controller 1 and is mainly used for bearing the reverse thrust of the brake clamping force in subsequent use; and the friction between the nut 8c and the force sensor in the subsequent use can be reduced; in the utility model, the first thrust bearing 6 can be a thrust needle bearing or a ball bearing.

[0076] Meanwhile, the second thrust bearing 11 is arranged on the side of the nut 8c close to the brake pad, the second thrust bearing 11 plays a supporting role, facilitates the support limiting of the torque input element 2, and ensures the stability of the arrangement of the nut 8c in the cylinder hole 4-1.

[0077] And the bearing mechanism in the utility model further includes the radial bearing 7; the side of the nut 8c is attached to the inside of the cylinder hole 4-1 through the radial bearing 7; the radial bearing 7 is arranged between the nut 8c and the cylinder hole 4-1; in this way, the sliding friction caused by the direct attachment of the nut 8c to the inner wall of the cylinder hole 4-1 can be avoided, the sliding friction between the nut 8c and the inner wall of the cylinder hole 4-1 can be changed into rolling friction through the arrangement of the radial bearing 7, and the friction force suffered by the nut 8c during rotation is reduced.

[0078] Meanwhile, the radial bearing 7 in the utility model is a sliding bearing, a needle bearing or a ball bearing.

[0079] Further, the brake caliper assembly in the utility model further includes an identification unit arranged in the cylinder hole 4-1; the identification unit includes a pressure identification unit 17 arranged in the cylinder hole 4-1; the pressure identification unit 17 is arranged at the position between the planetary roller screw mechanism 8 and the inner wall of the cylinder hole 4-1; through the arrangement of the pressure identification unit 17, the operating personnel can conveniently identify the reverse thrust of the clamping force during wheel braking; in the utility model, the pressure identification unit 17 can be a force sensor.

[0080] Further, the planetary roller screw mechanism 8 in the utility model is one of differential planetary roller screw mechanism 8, standard planetary roller screw mechanism 8, reverse planetary roller screw mechanism 8 or circulating planetary roller screw mechanism 8; when being selected specifically, it can be selected according to requirements.

[0081] As shown in the figure, the utility model provides a kind of brake caliper assembly, including brake caliper, brake pad and executor, it is characterized in that, the brake caliper includes caliper body 4;At least one set of planetary roller screw mechanism 8 that can convert rotary motion into linear motion to make brake pad linear motion is provided in the caliper body 4.

[0082] Brake pad is provided with two, two brake pads are oppositely arranged inner brake pad 14 and outer brake pad 16, brake disc 15 is located between inner brake pad 14 and outer brake pad 16, in the braking process, inner brake pad 14 and outer brake pad 16 cooperate to be used for clamping brake disc 15.

[0083] As shown in the figure, the utility model executor is connected with planetary roller screw mechanism 8 and is used to generate the power for making planetary roller screw mechanism 8 run, and the executor can be arranged at the outside or inside of brake caliper.

[0084] In the utility model, the executor includes input element 2, controller 1 and torque transmission element 3;The input element 2 and controller 1 of executor are as known to those skilled in the art, and specific structure will not be stated here.

[0085] The torque transmission element 3 of the utility model is mainly used for the transmission of rotary kinetic energy, and the input element 2 is generally a motor, which is connected with planetary roller screw mechanism 8 through torque transmission element 3.

[0086] Torque transmission element 3 includes torque input element 9, and the torque input element 9 is a gear transmission mechanism, which can be an input gear, and the gear transmission mechanism is used to transmit the power generated by the motor to planetary roller screw mechanism 8, so that planetary roller screw mechanism 8 runs, and finally makes the brake pad move linearly along the direction parallel to the axial direction of brake disc 15, to clamp or release brake disc 15.

[0087] In the utility model, the planetary roller screw mechanism 8 is a circulating planetary roller screw mechanism 8 or a non-circulating planetary roller screw mechanism 8, and the non-circulating planetary roller screw mechanism 8 is a screw rod input type planetary roller 8b screw mechanism, a nut 8c input type planetary roller 8b screw mechanism or a PWG type differential planetary roller screw mechanism 8, etc.

[0088] The lead of the planetary roller screw mechanism 8 is less than or equal to 5mm, preferably less than or equal to 3mm, the same number of rotation circles of the actuator, the linear motion distance of the base 19 is shorter, according to the law of conservation of energy, a greater thrust force is generated, and the requirement of the braking force can be better met.

[0089] The planetary roller screw mechanism 8 is similar to the ball screw structure, and there is little difference in efficiency between the planetary roller screw mechanism 8 and the ball screw, but according to the calculation of the Hertz pressure law, the carrying capacity of the planetary roller screw mechanism 8 is 3 times that of the ball screw, and the service life is 15 times that of the ball screw, so that the carrying and service life requirements of the EMB are greatly met.

[0090] In order to guarantee the transmission precision of the planetary roller screw mechanism 8, the brake caliper assembly further comprises a sealing cover 13 arranged on the brake caliper.

[0091] A brake system comprises the brake caliper assembly.

[0092] A vehicle comprises the brake system.

[0093] Specifically,

[0094] The utility model discloses a brake caliper assembly, at least including brake caliper, brake pad and actuator, speed reduction and torque increasing mechanism and planetary roller screw mechanism 8.

[0095] In the utility model, the actuator includes controller 1, and the planetary roller screw mechanism 8 at least contains rotating part and translation part, the controller 1 is arranged at the same side of input element 2 and planetary roller screw mechanism 8, the planetary roller 8b screw is arranged in the cylinder hole 4 of brake caliper 1, the nut 8c is rotating part, and the screw shaft 8a is translation part, one end of screw rod axle cooperates with inner brake block, the other end can be arranged caliper body 4 or passes through caliper body 4 and enters the controller housing 1 of controller 1, and simultaneously, anti -rotation element 5 is set up on caliper body 4 or controller housing 1 and cooperates with screw shaft 8a, and the rotation of screw shaft 8a is limited.

[0096] In the utility model, one end of the screw shaft 8a can partially pass through or completely penetrate the first thrust bearing 6 and / or force sensor, and / or caliper body 4 head, and / or controller housing 1, and the length of the screw shaft 8a can be designed to be different lengths according to requirements, so as to adapt to different thicknesses of the friction plate or brake disc 15.

[0097] In the utility model, the passive element of the last stage transmission pair of torque transmission element 3 is torque input element 9, and the inner hole of the torque input element 9 is fixedly connected with the outer wall of the nut 8c.

[0098] One end of the nut 8c is provided with a first thrust bearing 6 for bearing the reverse thrust of the clamping force, and the first thrust bearing 6 is a thrust needle bearing or a ball bearing.

[0099] One side of the torque input element 9, the nut 8c and the cylinder hole 4-1 are provided with a radial bearing 7, and the radial bearing 7 is a sliding bearing, a needle bearing or a ball bearing.

[0100] The other side of the torque input element 9 is provided with a second thrust bearing 11, and the second thrust bearing 11 is a thrust needle bearing or a ball bearing.

[0101] In the utility model, the second thrust bearing 11 and the brake caliper are fixed through the positioning ring plate 12, the positioning ring plate 12 and the brake caliper are connected in interference, and the inner hole of the positioning ring plate 12 and the outer wall of the nut 8c are matched in clearance.

[0102] The first thrust bearing 6 is provided with a force sensor away from the inner brake pad 14.

[0103] When the anti-rotation element 5 is connected to the caliper body 4, the lead screw shaft 8a has a spline hole in the utility model, the caliper body 4 has a through hole, and the anti-rotation element 5 is arranged in the through hole; the head of the anti-rotation element 5 has a spline matched with the spline hole of the lead screw shaft 8a; the anti-rotation element 5 and the through hole are interference fit.

[0104] When the anti-rotation element 5 is arranged on the controller housing 1-1, the lead screw shaft 8a is required to extend to the inside of the controller housing 1-1 through the through hole on the caliper body 4.

[0105] In the utility model, the sealing cover 13 is arranged between the base 19 and the brake caliper.

[0106] In the utility model, the caliper body 4 has two cavities, one of which is the above-mentioned cylinder hole 4-1, and the cavity is used for placing the planetary roller lead screw mechanism 8, and the other cavity is used for placing the input element 2 and other components, and the two cavities are connected in communication through the lateral opening 18, and the speed increasing mechanism is arranged at the lateral opening 18.

[0107] In the utility model, the planetary roller 8b lead screw can be differential type, standard type, reverse type or circulating type; the lead screw shaft 8a and the torque input element 9 are coaxially arranged, and the torque input element 9 can be a belt wheel, a worm wheel or a gear.

[0108] The utility model discloses a planetary roller screw mechanism 8 is used, and the subsequent drive nut 8c is advanced, and the brake piece is pushed by screw rod axle 8a, and the screw rod axle 8a can be made small in diameter, and passes through the thrust needle bearing, the caliper body 4, even ECU and circuit board, and the screw rod can pass through the caliper body 4 and enter the controller 1, so this can make full use of the space inside the controller 1, thereby parallelly using axial space, can shorten the axial dimension of the caliper assembly, the length of screw rod axle can be designed into different lengths according to the demand, thereby adapting the friction plate or brake disc 15 of different thickness, and the diameter of screw rod axle 8a is small, can reduce the diameter of thrust needle bearing and cylinder hole 4-1, thereby reducing the radial dimension of the caliper assembly, more favorable to arranging on the whole vehicle.

[0109] The utility model discloses a brake caliper assembly, main structure includes actuator, brake caliper, motion conversion mechanism, actuator includes input element 2, controller 1 and torque transmission element 3, the last stage gear pair's passive gear of torque transmission element 3, namely input gear, is fixed in the rotation piece outside of motion conversion mechanism, and this motion conversion mechanism is planetary roller screw mechanism 8, and its rotation piece is nut 8c, and the translation piece is screw rod axle 8a, and screw rod axle one end surface at least passes through nut 8c and the last stage gear pair's passive gear of gear mechanism, and screw rod axle is prevented from rotating through the anti -rotation screw, guarantees its linear motion, and motion conversion mechanism converts the torque and rotation speed of rotation piece into the linear motion and thrust of translation piece, and directly promotes the brake piece clamping brake disc 15.

[0110] The utility model discloses an advantage lies in through with planetary roller screw mechanism 8 replaces ball screw, increases the bearing capacity and transmission precision of brake caliper, satisfies the requirement of long -term use, and the axial dimension of screw rod axle is changeable, has the arrangement of multiple anti -rotation structure.

[0111] In the utility model, use planetary roller 8b screw, its function and ball screw mechanism are same, all are the linear motion of rotation motion conversion, and the difference lies in that the load element of planetary roller 8b screw is screw roller 8b, is line contact, and the load transmission element of ball screw is ball, is point contact, and use screw roller 8b to replace ball to make load through numerous contact points release rapidly, thereby let planetary roller 8b screw can have higher anti -load and impact capacity, and general load can reach 3 times of ball screw of same specification, and the life of planetary roller 8b screw is 15 times of ball screw, greatly increases the durability.

[0112] The utility model discloses, screw shaft 8a diameter is small, reduce the friction torque of the needle roller bearing arranged on screw shaft 8a, increase the ball screw life, force sensor contact area is small, can increase the precision of force sensor, can reduce the radial dimension of brake caliper cavity simultaneously, the end face of its at least passes through the passive gear of last stage gear pair of nut 8c and gear mechanism, and anti -rotation element 5 can be installed on brake caliper or install on controller 1.

[0113] The following will be described in conjunction with specific implementation cases:

[0114] Implementation case one:

[0115] As Figure 1 Shown, brake caliper at least includes executor, brake caliper, motion conversion mechanism, wherein: executor, at least including controller 1, input element 2, torque transmission element 3, the passive gear of last stage gear pair of torque transmission element 3 is input gear;Executor is the existing mature technology, hereinafter will not be repeated.

[0116] Motion conversion mechanism, for planetary roller 8b screw, at least including rotating part and translation part, rotating part is nut 8c, translation part is screw shaft 8a, transmission part is thread roller 8b, nut 8c is annular, both ends are open, screw shaft 8a and base 19 cross section presents T shape, nut 8c has internal thread, screw shaft 8a has external thread, screw shaft 8a and nut 8c between having roller 8b, screw shaft 8a end has with anti -rotation screw cooperation anti -rotation groove 8a1, this anti -rotation groove 8a1 guarantees that screw shaft 8a can carry out linear motion, screw and base 19 are fixed through screw, input gear inner ring and nut 8c outer ring are interference connection, input gear and nut 8c synchronous rotation.

[0117] Brake caliper, with cavity and hook claw, cavity and hook claw between sequentially set inner brake piece 14, brake disc 15 and outer brake piece 16, simultaneously, brake caliper includes caliper body 4, and caliper body 4 is equipped with cylinder hole 4-1, and cylinder hole 4-1 is arranged with planetary roller screw mechanism 8, and cylinder hole 4-1 has lower opening 10 and lateral opening 18.

[0118] The opening direction of lower opening 10 is towards inner brake piece 14, and screw shaft 8a passes through lower opening 10 and directly adheres to inner brake piece 14, and the side of cavity close to lower opening 10 has lateral opening 18, and torque transmission element 3 passes through lateral opening 18.

[0119] The lower opening 10 of cavity is installed with positioning ring plate 12, and the connection mode is interference fit, which is used for fixing planetary roller 8b screw, bearing and other elements.

[0120] The end face of brake caliper away from hook claw has an opening, which is used for arranging anti -rotation element 5, and the anti -rotation element 5 can be anti -rotation screw.

[0121] A bearing mechanism is arranged between the outer side of the nut 8c and the inner wall of the cylinder hole 4-1 of the brake caliper, which can be a needle bearing or a deep groove ball bearing or other radial bearing 7; the radial bearing 7 converts the sliding friction between the nut 8c and the cavity into rolling friction, ensuring that the nut 8c can rotate smoothly, and the end of the nut 8c away from the hook is provided between the top of the cylinder hole 4-1 of the brake caliper and the first thrust bearing 6, which is a thrust needle bearing, arranged between the planetary roller screw mechanism 8 and the inner wall of the cylinder hole 4-1 of the brake caliper. The thrust needle bearing is an axial support bearing for bearing the axial load of the motion conversion mechanism, while converting the sliding friction between the nut 8c and the force sensor into rolling friction, ensuring that the nut 8c can rotate smoothly.

[0122] The input gear is provided with a second thrust bearing 11 on the side close to the inner brake pad 14, which is a thrust needle bearing, one side of which cooperates with the end face of the input gear, and the other side cooperates with the end face of the positioning ring plate 12.

[0123] The screw shaft 8a of the planetary roller 8b screw passes through the first thrust needle bearing and does not contact the inner wall of the brake caliper cavity, and the base 19 is provided with a sealing groove, and a sealing cover 13 is installed between the brake caliper and the base 19 to ensure the sealing of the brake caliper.

[0124] The anti-rotation screw is fixed on the brake caliper and cooperates with the spline of the inner hole of the screw shaft 8a, so that it only performs linear motion and does not perform rotational motion.

[0125] Implementation case two:

[0126] As shown in Figure 2 , the structure of the brake caliper provided in the embodiment is different from that of the brake caliper provided in embodiment one in that the size of the screw shaft 8a in the planetary roller screw mechanism 8 in the embodiment is different, and the arrangement of the anti-rotation element 5 is different.

[0127] The screw shaft 8a passes through the caliper body 4 of the brake caliper and enters the inside of the controller 1, and the anti-rotation screw is arranged on the controller housing 1-1 and cooperates with the spline groove of the inner hole of the screw shaft 8a to prevent rotation. The axial size of the anti-rotation screw is larger than that in implementation case one, which prevents it from coming out of the inner hole of the screw shaft 8a and causing the anti-rotation structure to fail.

[0128] Implementation case three:

[0129] As shown in Figure 3 , the structure of the brake caliper provided in the embodiment is different from that of the brake caliper provided in embodiment one in that the brake caliper in the embodiment is provided with a force sensor, and the force sensor is arranged between the first thrust bearing 6 and the inner wall of the brake caliper.

[0130] The arrangement with the force sensor can monitor the value of the caliper clamping force in real time, and can conveniently realize the control of the caliper.

[0131] Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, and various non-essential improvements using the method concept and technical scheme of the utility model are within the protection scope of the utility model.

Claims

1. A brake caliper assembly comprising a brake caliper, a brake pad and an actuator, characterized in that, The brake caliper comprises a caliper body; at least one planetary roller screw mechanism is arranged in the caliper body, which can convert the rotary motion into linear motion to drive the brake pad to move linearly; The planetary roller screw mechanism comprises a screw shaft, a nut and a roller; The roller is sleeved on the screw shaft, and the nut is sleeved on the roller; The planetary roller screw mechanism further comprises an anti-rotation component, the anti-rotation component comprises an anti-rotation element connected to the screw shaft; the anti-rotation element can limit the rotation of the screw shaft; the anti-rotation element is connected to the actuator or the caliper body and connected to the screw shaft; The actuator controls the rotation of the nut; the nut can drive the screw shaft to move linearly through the roller.

2. A brake caliper assembly according to claim 1, wherein, The caliper body is provided with a cylinder hole; the planetary roller screw mechanism is inserted into the cylinder hole; the screw shaft in the planetary roller screw mechanism is arranged in the cylinder hole and extends to the brake pad and / or the actuator.

3. A brake caliper assembly according to any one of claims 1-2, characterized in that, The screw shaft comprises a shaft body, and the shaft body is provided with an anti-rotation groove; the anti-rotation element is inserted into the anti-rotation groove.

4. A brake caliper assembly according to claim 1, wherein, The actuator is connected to the nut through a torque transmission element; the torque transmission element can drive the nut to rotate.

5. A brake caliper assembly according to claim 4, wherein, The nut comprises a nut body; the nut body is provided with a connecting ring groove; the connecting ring groove is arranged at one end of the nut body close to the brake pad; the torque input element in the torque transmission element is arranged in the connecting ring groove.

6. A brake caliper assembly according to claim 1, wherein, The screw shaft is provided with a base at one end close to the brake pad; the screw shaft and the base are connected in a fixed or detachable manner; The relative position of the screw shaft and the base is fixed during work.

7. A brake caliper assembly according to claim 4, wherein The caliper body is provided with a lower opening; the lower opening is communicated with the cylinder hole; the planetary roller screw mechanism passes through the lower opening and is connected to the brake pad; the caliper body is further provided with a lateral opening; the torque transmission element passes through the lateral opening and is connected to the nut.

8. A brake caliper assembly according to claim 7, wherein, The lower opening is provided with a positioning ring plate; the positioning ring plate is sleeved on the planetary roller screw mechanism.

9. A brake caliper assembly according to claim 1 wherein, The brake caliper assembly further comprises a bearing mechanism arranged in the cylinder hole; the bearing mechanism comprises a thrust bearing arranged on the nut.

10. A brake caliper assembly according to claim 9, wherein, The thrust bearing comprises a first thrust bearing and a second thrust bearing; the first thrust bearing and the second thrust bearing are distributed at both ends of the nut; the first thrust bearing is arranged at one end of the nut away from the brake pad; the second thrust bearing is arranged between the torque input element and the positioning ring plate; The bearing mechanism further comprises a radial bearing; the side surface of the nut is fitted with the inner part of the cylinder hole through the radial bearing.

11. A brake caliper assembly according to claim 1, wherein, The brake caliper assembly further comprises an identification unit arranged in the cylinder hole; the identification unit comprises a pressure identification unit arranged in the cylinder hole; the pressure identification unit is arranged between the planetary roller screw mechanism and the inner wall of the cylinder hole.

12. A brake caliper assembly according to claim 1, wherein, The planetary roller screw mechanism is one of a differential planetary roller screw mechanism, a standard planetary roller screw mechanism, a reverse planetary roller screw mechanism or a circulating planetary roller screw mechanism.

13. A brake system characterized by, The brake caliper assembly comprises any one of claims 1-12.

14. A vehicle characterized by comprising: The brake system comprises claim 13.

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