Motion conversion structure and brake caliper assembly with same

Abstract

The utility model relates to the field of brake calipers, in particular to a motion conversion structure and a brake caliper assembly with the motion conversion structure, which comprise a lead screw shaft, a ball and a translation mechanism, the balls are arranged in an area between the lead screw shaft and the translation mechanism; the motion conversion structure further comprises a return structure; the reversing structure is arranged on the lead screw shaft; the reversing structure is arranged on the lead screw shaft, so that the axial size of the lead screw shaft can be smaller than that of the nut, the first bearing is arranged on one side of the lead screw shaft, the radial space of the first bearing is increased, the axial size of the first bearing can be reduced, and therefore the axial size of the caliper assembly is reduced, and the service life of the caliper assembly is prolonged. And the internal space of the motion conversion structure is fully utilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of brake caliper, specifically to a motion conversion structure and brake caliper assembly with the motion conversion structure. BACKGROUND

[0002] At present, the mainstream brake scheme of the automobile market is the traditional hydraulic brake system, with the development of automobile intelligentization, it is the general trend that the electronic mechanical brake system (EMB) replaces the hydraulic brake system, it has a more simple system structure, is convenient for maintenance, replaces the hydraulic pipeline with the electric wire circuit, realizes the transmission from the pedal signal to the actuator through the electronic signal, has the characteristics such as fast response, high efficiency, small volume, light weight.

[0003] The common linear element of the EMB motion conversion structure is the ball screw, which can convert the torque and rotational speed input by the motor into the linear motion of the piston to realize the caliper brake.

[0004] Since the threads of the ball screw nut and the screw are one-way non-closed spiral curves, the ball cannot circulate on the raceway, so a return device needs to be installed, which can provide a closed channel for the ball to circulate on the raceway of the nut and the screw, allowing the ball to circulate on a channel. In a word, the ball screw mechanism is the key to the EMB motion conversion, and the return device is the key to the operation of the ball screw mechanism.

[0005] The return device of the ball screw has multiple forms, and the function is to connect the two ends of the ball circulation to form a closed loop.

[0006] At present, the common structure of the ball screw used by the EMB system is that the return device is arranged on the nut, for example, the content disclosed in patent 202222303249.2 - a brake caliper. The traditional structure nut is a translation piece, the screw is a rotating piece, and the movement cycle of the ball is an internal cycle. Although this arrangement can achieve closed loop circulation of the ball, since the nut will move linearly, in order to prevent the ball from falling off, the length of the screw is at least greater than the sum of the linear stroke of the nut and the length of the ball closed loop raceway. In this way, the size of the screw will be larger.

[0007] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing caliper assembly. INVENTION CONTENTS

[0008] The utility model aims at providing a caliper assembly motion conversion structure which can reduce the axial size of the screw shaft.

[0009] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0010] A motion conversion structure, comprising a screw shaft, a ball, and a translation mechanism; the ball is arranged in the region between the screw shaft and the translation mechanism;

[0011] The motion conversion structure further comprises a return structure; the return structure is arranged on the screw shaft.

[0012] The screw shaft is provided with an external thread raceway for ball circulation; the screw shaft is provided with a return structure; the return structure can at least realize the connection of adjacent external thread raceways to form a closed loop circulation raceway; the return structure is designed integrally or separately with the screw shaft.

[0013] The return structure comprises an upward thread raceway arranged on the screw shaft, which is used to connect adjacent two thread raceways.

[0014] The return structure comprises a mounting groove arranged on the screw shaft, and a return device arranged in the mounting groove; the return device is provided with an upward thread raceway; the upward thread raceway on the return device is used to connect adjacent two thread raceways.

[0015] The screw shaft comprises a shaft body, and the shaft body is provided with an avoidance groove; the avoidance groove comprises a lower avoidance groove and an upper avoidance groove arranged on the shaft body, and the lower avoidance groove and the upper avoidance groove are distributed at both ends of the shaft body.

[0016] The translation mechanism comprises a nut and a base; the nut is connected with a brake piece through the base.

[0017] A positioning structure is arranged between the screw shaft and the base; the positioning structure comprises a base zero position boss arranged on the base and a screw positioning table arranged at the end of the screw shaft; the outer side surface of the side close to the screw positioning table of the base zero position boss is an arc surface.

[0018] The nut and the base in the translation mechanism are designed in a separate manner.

[0019] A brake caliper assembly, comprising a brake caliper, a brake piece, and an actuator, characterized in that the brake caliper comprises a caliper body; at least one set of the motion conversion structure is arranged in the caliper body.

[0020] The motion conversion structure can convert rotary motion into linear motion to make the brake piece move linearly.

[0021] The actuator controls the rotation of the screw shaft; the screw shaft can drive the translation mechanism to move linearly through the ball.

[0022] The caliper body is provided with a cylinder hole; the motion conversion structure is inserted into the cylinder hole; the actuator controls the operation of the motion conversion structure through a transmission shaft; the transmission shaft comprises a transmission shaft body, and the transmission shaft body is provided with a transmission end block; the transmission end block is inserted into the upper avoiding groove.

[0023] The upper avoiding groove of the lead screw shaft is provided with a position adjusting groove, and the position adjusting groove comprises a calibration groove and an arc-shaped groove; the calibration groove extends from the upper avoiding groove to one side of the lower avoiding groove; and the arc-shaped groove extends from the calibration groove to one side of the lower avoiding groove.

[0024] The transmission end block comprises an end block body, and the end block body is provided with an adjusting piece; one end of the adjusting piece is inserted into the end block body, and the other end is inserted into the position adjusting groove; and the adjusting piece is movably connected with the end block body and the lead screw shaft.

[0025] The adjusting piece comprises a middle section and spherical surfaces arranged at two ends of the middle section; the end block body is also provided with a position adjusting groove; one end of the adjusting piece is arranged in the position adjusting groove of the end block body, and the other end is arranged in the position adjusting groove of the lead screw shaft.

[0026] The pre-tightening mechanism comprises a stop ring; an annular embedding groove is arranged on the inner wall of the upper avoiding groove of the lead screw shaft, and the stop ring is embedded in the annular embedding groove and is lapped on the transmission shaft.

[0027] The transmission end block is provided with an annular groove; and the stop ring is lapped on the transmission end block.

[0028] The pre-tightening mechanism further comprises an elastic component; the elastic component comprises one or more of a disc spring, a wave spring and a top-pushing wave spring; and the stop ring is lapped on the transmission shaft through the elastic component.

[0029] The pre-tightening mechanism further comprises a gasket; and the stop ring is connected with the elastic component through the gasket.

[0030] The utility model discloses the advantages are:

[0031] The utility model discloses a motion conversion structure and brake caliper assembly with the motion conversion structure.

[0032] The utility model discloses a motion conversion structure and brake caliper assembly with the motion conversion structure.

[0033] The utility model discloses a brake caliper assembly, and the return structure is arranged on the screw shaft, which can reduce the axial dimension of the brake caliper assembly, and the stability of the connection between the transmission shaft and the screw shaft can be ensured through the setting of the pre-tightening mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0034] The following is a brief description of the contents expressed by each drawing of the utility model specification and the marks in the drawings:

[0035] Figure 1 The utility model discloses a brake caliper assembly.

[0036] Figure 2 The utility model discloses a structure schematic view of the translation mechanism.

[0037] Figure 3 The utility model discloses a bottom view.

[0038] Figure 4 The utility model discloses a top view of the bottom.

[0039] Figure 5 The utility model discloses a sectional view of the bottom.

[0040] Figure 6 The utility model discloses a structure schematic view when the return structure is arranged on the screw shaft. Figure 5

[0041] Figure 7 The utility model discloses a structure schematic view of the translation mechanism in the second embodiment.

[0042] Figure 8 The utility model discloses a brake caliper assembly.

[0043] Figure 9 The utility model discloses a structure schematic view when the return structure is arranged on the screw shaft.

[0044] Figure 10 The utility model discloses a structure schematic view when the return structure is arranged on the screw shaft.

[0045] Figure 11 The utility model discloses a structure schematic view when the return structure is arranged on the screw shaft.

[0046] Figure 12 The utility model discloses a structure schematic view when the return structure is arranged on the screw shaft.

[0047] Figure 13 The utility model discloses a brake caliper assembly.

[0048] The marks in the above drawings are:

[0049] ​1, executor; 2, caliper body; 2-1, cylinder hole, 3, caliper body bushing; 4, transmission shaft; 4a, torque transmission shaft; 4b, flange sleeve; 41, transmission shaft body, 42, transmission end block, 43, annular sink; 44, adjusting piece; 441, middle section; 442, spherical surface; 5, first bearing; 6, pre-tightening mechanism; 6a, check ring; 6b, double-layer check ring; 6c, disc spring; 6d, gasket; 6e, wave spring; 6f, counteracting wave spring; 7, motion conversion structure; 7a, lead screw shaft; 7a-1, return mechanism, 7-1, adjusting sink, 7a1, annular insert, 7a2, upper avoidance sink; 7a3, lower avoidance sink; 7a4, calibration sink; 7a5, arc-shaped groove; 7a6, lead screw positioning table; 7b, nut; 8, base; 81, base; 82, side ring seat, 8a, base positioning groove, 8b, base zero position boss; 8c, positioning surface, 9, dust cover; 10, inner friction plate; 11, brake disc; 12, outer brake pad. DETAILED DESCRIPTION

[0050] The specific embodiments of the utility model are further described in detail below by describing the optimal embodiment with reference to the drawings.

[0051] A motion conversion structure, including lead screw shaft, ball, translation mechanism;The ball is arranged between the lead screw shaft and the translation mechanism region;The motion conversion structure further includes return structure;The return structure is arranged on the lead screw shaft;The utility model discloses through the return structure is arranged on the lead screw shaft, so that the axial dimension of the lead screw shaft can be less than the axial dimension of the nut, the first bearing is arranged on one side of the lead screw shaft, the radial space of the first bearing will increase, and the axial dimension can be reduced, thereby reducing the axial dimension of the caliper assembly, and the space inside the motion conversion structure is fully utilized.

[0052] The return structure 7a-1 in the utility model is mainly used for the circulating rolling of the ball, and the return structure 7a-1 is arranged on the lead screw shaft 7a in the utility model;Based on such setting, the steel ball realizes the circulation on the thread rolling way of the lead screw shaft 7a through the return structure 7a-1.

[0053] When the return structure 7a-1 is arranged on the lead screw shaft 7a, the return structure 7a-1 is arranged on the outer thread rolling way of the steel ball circulation of the lead screw shaft 7a;The return structure 7a-1 is realized by machining or installing the return device;The utility model moves the return structure 7a-1 on the lead screw shaft 7a, and the axial length of the lead screw shaft 7a can be less than the axial length of the nut 7b in subsequent use.

[0054] By arranging the reversing structure 7a-1 on the screw shaft 7a, the axial dimension of the screw shaft 7a can be smaller than the axial dimension of the nut 7b, on the one hand, material is saved, on the other hand, the screw shaft 7a is arranged in parallel with the first bearing 5, the wall thickness dimension of the screw shaft 7a is saved in the radial direction, the radial arrangement space of the first bearing 5 is larger, the first bearing 5 can be larger and can bear larger load; or the size of the first bearing 5 is not changed, the radial dimension of the screw shaft 7a is reduced, and the screw shaft 7a can be smaller; thereby the axial dimension of the caliper assembly is reduced, and the space inside the screw shaft 7a is fully utilized.

[0055] Further, in the utility model, the reversing device is installed on the screw shaft 7a or the reversing track structure is directly machined, and the ball passes through the reversing structure 7a-1 to form a closed loop circulating raceway.

[0056] Specifically, in the utility model, the screw shaft is provided with an external thread raceway for ball circulation; the external thread raceway 7a01 is generally designed as a downward rotating raceway structure; and the screw shaft is provided with a reversing structure in the utility model; the reversing structure can at least realize the connection of adjacent external thread raceways 7a01 to form a closed loop circulating raceway; based on the arrangement, the circulating rolling operation of the ball can be realized.

[0057] And the reversing structure and the screw shaft are designed integrally or separately in the utility model; the integral design generally means that the reversing structure is directly arranged on the screw shaft, for example, an upward thread raceway 7a-11 is directly arranged on the screw shaft below.

[0058] The separate design generally means that an additional reversing device is arranged on the screw shaft, and the connection and communication of adjacent thread raceways are realized through the upward thread raceway 7a-11 on the reversing device.

[0059] The two design modes have specific technical effects respectively, the reversing structure is directly machined on the screw shaft, the integrity of the reversing structure and the screw shaft can be ensured, and the subsequent installation process is simplified, and the reversing device is arranged afterwards, the machining difficulty of the reversing structure can be reduced, and the machining efficiency of the reversing device is improved.

[0060] Specifically, in the utility model, the reversing structure comprises an upward thread raceway 7a-11 arranged on the screw shaft, and the upward thread raceway 7a-11 is used for connecting adjacent two thread raceways 7a01; the corresponding upward thread raceway 7a-11 is machined on the screw shaft in the utility model; thereby the connection and communication between adjacent thread raceways can be realized, so that the two thread raceways and the upward thread raceway 7a-11 form a closed loop circulating raceway; thereby the circulating rolling of the ball is realized.

[0061] The return structure includes a mounting groove arranged on the screw shaft, a return device is arranged in the mounting groove, and an upward threaded raceway 7a-11 is arranged in the return device; the upward threaded raceway 7a-11 on the return device is used for connecting adjacent two threaded raceways; the return device is essentially a shell structure with a semicircular cross section, and the upward threaded raceway 7a-11 plays a good connecting and communicating role, so that a closed loop circulating raceway is formed; subsequent use is facilitated, and the circulation rolling of the ball in the closed loop circulating raceway is realized.

[0062] In addition, upward and downward in the above are expressions based on the drawings; upward and upward and downward do not have specific limiting meanings.

[0063] Further, in the utility model, the translation mechanism mainly includes nut 7b, base 8, nut 7b adopts split type design with base 8, the utility model discloses a split type design of base 8 and nut 7b, and base 8 acts as a piston structure, in subsequent use, the size of nut 7b can be reduced, and then the radial dimension of cylinder hole 2-1 is reduced, and simultaneously, in subsequent use, the size and model of base 8 can be changed according to needs, so that the application range of the utility model can be improved to a certain extent.

[0064] The translation mechanism disclosed by the utility model is essentially the translation part in the motion conversion structure 7, and the translation mechanism disclosed by the utility model mainly includes nut 7b, and the nut 7b is the translation part in the screw shaft 7a mechanism, when in use, the rotation of the screw shaft 7a drives the nut 7b to move through the ball, and then the position of the inner brake pad 10 can be changed in subsequent use.

[0065] In addition, in the utility model, the nut 7b is connected with the base 8, the base 8 is equivalent to a piston structure, under the premise that the actuator 1 drives the screw shaft 7a to rotate, the base 8 can move linearly along the axial direction, so that the position of the inner brake pad 10 can be changed, and finally the inner brake pad 10 and the outer brake pad 12 move linearly relative to the brake disc 11 in the direction parallel to the axial direction of the brake disc 11, so as to clamp or release the brake disc 11.

[0066] In the utility model, the nut 7b and the base 8 adopt split type design; the setting makes the nut 7b and the base 8 can select corresponding model and size according to needs, so that the translation mechanism disclosed by the utility model is applicable to brake pads of different models.

[0067] In addition, in the utility model, the nut 7b is arranged in the cylinder hole 2-1 of the caliper body 2, and the nut 7b is connected with the inner brake pad 10 through the base 8, in subsequent use, the movement of the base 8 can be driven through the movement of the nut 7b, and then the movement of the inner brake pad 10 is driven.

[0068] Further, in the utility model, the nut 7b comprises a nut body; the nut body is the main structure of the nut 7b, and in the utility model, the base 8 comprises a base 81; the base 81 is provided with a side edge ring seat 82; the base 81 is a base plate structure, and the side edge ring seat 82 is arranged at the periphery of the base 81; the side edge ring seat 82 is an annular seat structure; when in use, the base 8 is conveniently sleeved on the nut 7b through the side edge ring seat 82, thereby realizing the connection between the nut 7b and the base 8.

[0069] In addition, in the utility model, the nut 7b and the base 8 are connected through a connecting mechanism; the connecting mechanism is arranged in the utility model, which facilitates the connection between the nut 7b and the base 8; the connecting mode can be the sleeving of interference fit, or welding, screwing or other connecting modes.

[0070] In the utility model, the connecting mechanism comprises a sleeving ring groove 7b1 arranged at the end of the nut body; the base 8 is sleeved on the sleeving ring groove 7b1 of the nut body through the side surface ring seat; the utility model is provided with the sleeving ring groove 7b1, so that a stepped platform is formed on the outer side of the nut body, facilitating the mutual positioning of the nut 7b and the base 8 during installation.

[0071] Further, in the utility model, the side edge ring seat 82 is provided with a side positioning groove; the side positioning groove forms a positioning surface 8c on the inner wall of the side edge ring seat 82; the side positioning groove forms a plane on the inner wall of the side edge ring seat 82, that is, the above-mentioned positioning surface 8c; the existence of the positioning surface 8c not only ensures the positioning of the base 8 and the nut 7b during installation, but also has certain anti-rotation capability.

[0072] Further, in the utility model, the positioning surface 8c is arranged obliquely; based on such arrangement, the inner wall of the side edge ring seat 82 has an inclined surface, thereby making the side edge ring seat 82 form a groove body with a large upper opening and a small lower opening; thereby facilitating the sleeving and installation of the base 8 on the nut 7b.

[0073] Further, in the utility model, the base 81 is provided with a base positioning groove 8a on the side away from the nut 7b; the base positioning groove 8a can control the position and orientation of the base 81 during subsequent assembly, so as to ensure the installation and placement position of the base 8.

[0074] In the utility model, the shape, structure and number of the base positioning groove 8a can be selected as required; mainly, the base positioning groove 8a can control the placement position of the base 8 in cooperation with the positioning member; generally, three base positioning grooves 8a can be arranged, and the three base positioning grooves 8a are distributed in a triangular shape; of course, other arrangement modes can also be selected.

[0075] The utility model discloses a motion conversion structure 7, including screw rod axle 7a, ball and the translation mechanism, the ball is arranged in the area between screw rod axle 7a and translation mechanism, the utility model discloses a motion conversion structure 7 can convert rotary motion into linear motion to make the brake pad of motion conversion structure 7 linear motion, realize the clamping of caliper and release operation in actual use.

[0076] In the utility model, the screw rod axle 7a is connected with the transmission shaft 4, the transmission shaft 4 can drive the screw rod axle 7a to rotate, under the transmission of the ball, the screw rod axle 7a has the tendency of driving the translation mechanism to rotate, but because the nut 7b is provided with the limiting mechanism on the inner wall of the cylinder hole 2-1, the nut 7b cannot rotate, and under the action of the rotating force applied by the screw rod axle 7a, the nut 7b will move linearly along the axial direction of the screw rod axle 7a, thereby realizing the driving of the nut 7b to the base 8, and further realizing the movement of the brake pad connected to the base 8.

[0077] Further, in the utility model, the screw rod axle 7a includes a shaft body, and the shaft body is a main structure of the screw rod axle 7a, and the shaft body is provided with an avoiding sink groove.

[0078] Specifically, in the utility model, the avoiding sink groove includes a lower avoiding sink groove 7a3 and an upper avoiding sink groove 7a2 arranged on the shaft body, and the lower avoiding sink groove 7a3 and the upper avoiding sink groove 7a2 are arranged at two ends of the shaft body.

[0079] Further, in the utility model, the screw rod axle 7a is provided with a positioning structure between the screw rod axle 7a and the base 8.

[0080] Specifically, in the utility model, the positioning structure includes a base zero position boss 8b arranged on the base 8 and a screw rod positioning table 7a6 arranged at an end of the screw rod axle 7a.

[0081] Meanwhile, in the utility model, the outer side surface of the base zero position boss 8b close to the side of the screw rod positioning table 7a6 is an arc surface. Such arrangement can avoid the normal rotation of the screw rod axle 7a affected by the arrangement of the base zero position boss 8b and the screw rod positioning table 7a6.

[0082] A brake caliper assembly, comprising a brake caliper, a brake pad and an actuator 1, the brake caliper comprises a caliper body 2; at least one set of the motion conversion structure 7 is arranged in the caliper body 2; the motion conversion structure 7 can convert rotary motion into linear motion to make the brake pad move linearly; the actuator 1 controls the rotation of the lead screw shaft 7a; the lead screw shaft 7a can drive the translation mechanism to move linearly through the ball.

[0083] The utility model discloses a brake caliper assembly mainly is a floating type caliper assembly.

[0084] Specifically, the utility model discloses a brake caliper assembly mainly includes brake caliper, brake pad and actuator 1, brake caliper is the main body structure of brake caliper assembly, and actuator 1 includes input element, controller and transmission shaft 4;The setting of actuator 1 is mainly used to drive the rotation of lead screw shaft 7a;Therefore, in use, as long as actuator 1 can drive the rotation of lead screw shaft 7a, it can be used in the utility model.

[0085] Meanwhile, the brake pad in the utility model is a brake pad, which is generally divided into an inner brake pad 10 and an outer brake pad 12 based on different arrangement positions, and is arranged on opposite sides of the brake disc 11 respectively, and subsequent clamping and friction of the inner brake pad 10 and the outer brake pad 12 on the brake disc 11 realizes the braking operation of the brake disc 11.

[0086] In addition, the motion conversion structure 7 in the utility model is a planetary ball screw shaft 7a mechanism.

[0087] In the utility model, the motion conversion structure 7 comprises a lead screw shaft 7a, a nut 7b and balls, the nut 7b is sleeved on the lead screw shaft 7a, and the balls are arranged between the nut 7b and the lead screw shaft 7a; the actuator 1 controls the rotation of the lead screw shaft 7a; the lead screw shaft 7a can drive the nut 7b to move linearly through the balls; the actuator 1 is connected to the lead screw shaft 7a through the transmission shaft 4, and the lead screw shaft 7a rotates under the driving of the transmission shaft 4; at this time, the lead screw shaft 7a is a rotating part, and the nut 7b is a translating part.

[0088] Meanwhile, the brake caliper in the utility model comprises a caliper body 2; the caliper body 2 is the main body structure of the brake caliper, and generally refers to the structure above the hook claw; at least one set of the motion conversion structure 7 capable of converting rotary motion into linear motion to make the brake pad move linearly is arranged in the caliper body 2; based on the statement, it can be known that the utility model can realize the use of brake caliper assemblies of different cylinder bodies, such as a double-cylinder brake caliper assembly, by arranging different numbers of motion conversion structures 7.

[0089] In addition, in order to ensure the linearity of the nut 7b movement, the cylinder hole 2-1 is connected with the nut 7b in the motion conversion structure 7 through the limiting mechanism in the utility model; the limiting mechanism is arranged, and the rotation of the nut 7b is limited.

[0090] Meanwhile, the limiting mechanism comprises a boss or a groove arranged on the nut 7b, and a groove or a boss corresponding to the boss or the groove on the nut 7b is arranged on the inner wall of the cylinder hole 2-1; based on the above, when the boss is arranged on the nut 7b, the groove is arranged on the inner wall of the cylinder hole 2-1, and the nut 7b is inserted into the groove through the boss; similarly, when the groove is arranged on the nut 7b, the boss is arranged on the inner wall of the cylinder hole 2-1; based on the arrangement, the rotation of the nut 7b in the cylinder hole 2-1 is limited.

[0091] Further, the caliper body 2 is provided with the cylinder hole 2-1 in the utility model; the motion conversion structure 7 is inserted into the cylinder hole 2-1; the actuator 1 controls the operation of the motion conversion structure 7 through the transmission shaft 4; the cylinder hole 2-1 is arranged, which is equivalent to forming an inner cavity structure in the caliper body 2, so that the motion conversion structure 7 is arranged in the caliper body 2.

[0092] Further, the brake caliper assembly further comprises a bearing mechanism in the utility model; the bearing mechanism plays a good supporting and limiting role, and is mainly used for bearing the reverse thrust of the brake clamping force in subsequent use.

[0093] Specifically, the bearing mechanism comprises a first bearing 5 arranged on the lead screw shaft 7a in the utility model; the first bearing 5 can be a thrust needle bearing; in actual arrangement, the first bearing 5 is arranged in the upper avoiding sink groove 7a2 at the end of the lead screw shaft 7a.

[0094] Further, the upper avoiding sink groove 7a2 of the lead screw shaft 7a is provided with a position adjusting sink groove 7-1; the position adjusting sink groove 7-1 is mainly used in cooperation with the protrusion at the end of the transmission shaft 4.

[0095] In addition, the position adjusting sink groove 7-1 comprises a calibration sink groove 7a4 and an arc-shaped groove 7a5; the calibration sink groove 7a4 extends from the upper avoiding sink groove 7a2 to one side of the lower avoiding sink groove 7a3; the arc-shaped groove 7a5 extends from the calibration sink groove 7a4 to one side of the lower avoiding sink groove 7a3; a stepped groove structure is formed through the upper avoiding sink groove 7a2, the calibration sink groove 7a4 and the arc-shaped groove 7a5; the arrangement can not only ensure the installation and positioning of the transmission shaft 4 on the lead screw shaft 7a, but also avoid the large deflection of the lead screw shaft 7a in use.

[0096] Further, the transmission shaft 4 comprises a transmission shaft body 41, and the transmission shaft body 41 is provided with a transmission end block 42; the transmission end block 42 is inserted into the avoiding sink groove 7a2; the transmission shaft body 41 is the main structure of the transmission shaft 4, and the transmission end block 42 is a convex block structure, so that the transmission shaft 4 has a convex, and the transmission shaft 4 and the lead screw shaft 7a have multiple positioning points during subsequent use, the area of the transmission shaft 4 and the lead screw shaft 7a is better guaranteed, and therefore the stability and accuracy of the connection between the transmission shaft 4 and the lead screw shaft 7a are better guaranteed.

[0097] In addition, the outer diameter of the end block body is greater than the outer diameter of the transmission shaft body 41; so that the end block body and the transmission shaft body 41 form an inverted T-shaped structure.

[0098] Further, the transmission end block 42 comprises an end block body, the end block body is the main structure of the transmission end block 42, and an adjusting piece 44 is arranged on the end block body; one end of the adjusting piece 44 is inserted into the end block body, and the other end is inserted into the adjusting sink groove 7-1; the adjusting piece 44 is movably connected with the end block body and the lead screw shaft 7a; the adjusting piece 44 is inserted into the end block body and the lead screw shaft 7a; meanwhile, the adjusting piece 44 comprises a middle section 441 and spherical surfaces 442 arranged at two ends of the middle section 441; the end block body is also provided with the adjusting sink groove 7-1; one end of the adjusting piece 44 is arranged in the adjusting sink groove 7-1 of the end block body, and the other end is arranged in the adjusting sink groove 7-1 of the lead screw shaft 7a; based on the above arrangement, the adjusting piece 44, the end block body and the lead screw shaft 7a form a double spherical pair mechanism.

[0099] The adjusting piece 44 has a centering function, and eliminates the influence of the braking tangential force on the transmission shaft 4.

[0100] In the utility model, the transmission end block 44 comprises an end block body and an adjusting piece 44; in the utility model, the end block body and the adjusting piece 44 can be an integral structure according to actual production needs, or can be a split type design as described above, and the specific design mode can be selected according to the working condition.

[0101] Further, the transmission shaft 4 and the lead screw shaft 7a are provided with a pre-tightening mechanism 6; the utility model can better guarantee the stability of the connection between the transmission shaft 4 and the lead screw shaft 7a through the arrangement of the pre-tightening mechanism 6.

[0102] Meanwhile, the pre-tightening mechanism 6 includes a check ring 6a; an annular embedding groove 7a1 is arranged on the inner wall of the upper avoiding sunken groove 7a2 on the screw rod shaft 7a, the check ring 6a is embedded in the annular embedding groove 7a1, and is lapped on the transmission shaft 4; the check ring 6a plays a role of longitudinal limiting, and avoids disengagement between the screw rod shaft 7a and the transmission shaft 4.

[0103] The annular embedding groove 7a1 is arranged on the inner wall of the upper avoiding sunken groove 7a2.

[0104] Further, the utility model discloses transmission end block 42 is equipped with annular sunken groove 43, check ring 6a is lapped on transmission end block 42, annular sunken groove 43 is arranged on transmission end block 42 side, and annular sunken groove 43 forms the ladder station on transmission end block 42, and the lapping of check ring 6a on transmission end block 42 is convenient.

[0105] Meanwhile check ring 6a still can select double -deck check ring 6b.

[0106] Further, the utility model discloses pre-tightening mechanism 6 still includes elastic component, and the utility model discloses can provide installation pre-tightening force for transmission shaft 4 and screw rod shaft 7a through the setting of elastic component.

[0107] In addition, the elastic component includes one or more of a disc spring 6c, a wave spring 6e, and a counteracting wave spring 6f; the check ring 6a is lapped on the transmission shaft 4 through the elastic component; the disc spring 6c, the wave spring 6e, and the counteracting wave spring 6f generate elastic potential energy by themselves to generate stable installation pre-tightening force between the transmission shaft 4 and the screw rod shaft 7a.

[0108] Further, the utility model discloses pre-tightening mechanism 6 still includes gasket 6d; check ring 6a is connected with elastic component through gasket 6d; gasket 6d plays good blocking effect, and gasket 6d is generally used in cooperation with wave spring 6e, check ring 6a provides positioning, gasket 6d prevents wave spring 6e from coming out of check ring 6a to make pre-tightening mechanism 6 fail, wave spring 6e is used to provide pre-tightening force, and the manufacturing technology of wave spring 6e is relatively perfect at present, and the size of pre-tightening force is controllable.

[0109] Further, the utility model discloses that the side of base 8 is connected with calliper body 2 through dust cover 9; one end of dust cover 9 is connected on calliper body 2, and the other end is connected on base 8; guarantee the sealing property of brake calliper.

[0110] Further, the utility model discloses transmission shaft 4 and screw rod shaft 7a are connected through spline mechanism, and the setting of spline mechanism in the utility model makes the connection between transmission shaft 4 and screw rod shaft 7a convenient, and the rotation of transmission shaft 4 can stably drive screw rod shaft 7a to rotate.

[0111] Specifically:

[0112] The utility model discloses a brake caliper assembly mainly includes actuator 1, brake caliper, motion conversion structure 7, actuator 1 includes motor and gear set for input torque, reduce the rotating speed, the rotating part of motion conversion structure 7 is lead screw shaft 7a, and the translation part is nut 7b, and nut 7b is fixedly connected with base 8, and the positioning structure is equipped between nut 7b and base 8, and convenient positioning installation, and base 8 directly acts as piston, and simultaneously the sealing groove is processed on base 8, and need to install sealing structure, prevent motion conversion structure 7 and external contact, motion conversion structure 7 converts the torque and rotating speed of rotating part into the linear motion and thrust of translation part, and directly promotes the brake pad clamping brake disc 11.

[0113] In prior art, the radial dimension of electronic mechanical brake caliper cylinder hole 2-1 is relatively large, and the reason is that: the existing EMB scheme piston is arranged outside the nut 7b of ball screw shaft 7a, and the piston occupies a certain radial space, in order to meet the arrangement of ball screw shaft 7a and piston, the cylinder hole 2-1 in caliper body needs to be machined very large, a ball screw shaft 7a can only adapt to a piston, and only suitable for single brake pad, in addition, the ball screw structure does not have positioning structure, and it is difficult to realize mass automatic production.

[0114] The utility model has the advantages that through the split type connecting structure of ball screw shaft 7a nut 7b and base 8, the radial dimension of caliper cylinder hole 2-1 can be reduced, ball screw shaft 7a nut 7b can be adapted to multiple bases 8 and then adapt to brake pads of different types and sizes, and the base 8 has positioning structure, convenient for positioning installation, and suitable for mass production.

[0115] In the utility model, the nut 7b and the base 8 are connected in a split type, one nut 7b can be adapted to multiple bases 8, the brake caliper does not need to be changed, the base 8 is arranged between the nut 7b and the brake pad, the matching surface of the nut 7b and the base 8 has a cylindrical surface and a positioning surface 8c, the positioning surface 8c has a small inward inclination, the cylindrical surface is connected in interference, the positioning surface 8c is connected in interference at the bottom position due to the inclination, so that the interference connection of the cylindrical surface is not affected, the nut 7b is conveniently installed at the beginning, and the positioning surface 8c is connected in interference at the root, and can also prevent rotation.

[0116] On this basis, welding or riveting can be added to ensure the stability of the connection between the base 8 and the nut 7b, and the base 8 acts as a piston.

[0117] Furthermore, the screw rod end face has a screw rod positioning table 7a6 matched with the inner side of the base 8, and generally, the nut 7b is installed on the outer side of the screw rod shaft 7a, the nut 7b has an inner thread or an inner raceway, the screw rod shaft 7a has an outer thread or an outer raceway, and the radial dimension of the nut 7b can be considered as the radial dimension of the motion conversion structure 7.

[0118] That is, the base 8 is connected with the nut 7b in a split type, and the base 8 acts as a piston without occupying additional radial space.

[0119] On the other hand, the base 8 has at least one base positioning groove 8a corresponding to the base zero position boss 8b, which is used for positioning when the base 8 is installed; the anti-rotation boss or groove provided on the outer wall of the nut 7b corresponds to the base positioning groove 8a, which is used for positioning when the motion conversion structure 7 is installed, so as to ensure that the boss or groove provided on the outer wall of the nut 7b can be aligned with the boss or groove on the cylinder hole 2-1; the base positioning groove 8a corresponds to the shape of the base 8, and when the contact part of the base 8 has a phase requirement with the brake pad, the base 8 body can be positioned through the base positioning groove 8a.

[0120] Meanwhile, in the utility model, the base positioning groove 8a and the positioning structure are arranged, which play a calibration role, and when the position of the base 8 is determined through the base positioning groove 8a, the position limitation of the nut 7b and the screw rod shaft 7a during installation can be realized by cooperating with the positioning structure.

[0121] In addition, in the utility model, the reverser can be arranged on the screw rod shaft 7a or the nut 7b as needed, when the reverser structure 7a-1 can be arranged on the nut 7b, it belongs to a conventional structure, which will not be repeated here, when the reverser structure 7a-1 can be arranged on the screw rod shaft 7a, the reverser structure 7a-1 is arranged on the screw rod shaft 7a to form a ball closed loop circulation, the transmission shaft 4 is arranged on the screw rod shaft 7a, the transmission shaft 4 and the screw rod shaft 7a are connected through the pre-tightening mechanism 6, the transmission shaft 4 transmits torque and rotating speed to the screw rod shaft 7a, the motion conversion structure 7 converts the torque and rotating speed of the rotating part into the linear motion and thrust of the translating part, and directly pushes the brake pad to clamp the brake disc 11.

[0122] In the prior art, the axial dimension of the screw rod shaft 7a in the electronic mechanical brake caliper is relatively large, and the reason is that: in the existing EMB scheme, the reverser of the ball screw shaft 7a is arranged on the nut 7b, since the nut 7b is a translating part, it needs to perform linear motion to realize caliper braking or release, in order to prevent the ball from falling off during the linear motion of the nut 7b, the axial dimension of the screw rod shaft 7a needs to be at least greater than the sum of the axial dimension of the closed loop ball circulation and the axial dimension of the linear stroke of the nut 7b, which makes the axial dimension of the screw rod shaft 7a large.

[0123] The utility model discloses a advantage lies in through the return structure 7a-1 is arranged on the screw rod axle 7a, directly adds the return structure 7a-1 or directly arranges the return device on the screw rod axle 7a outside screw thread machine, such that the axial dimension of screw rod axle 7a only needs to satisfy the axial dimension of closed circuit ball circulation, is the nut 7b as the translational part, and screw rod axle 7a is the rotary part, so no matter how the nut 7b moves, the ball will not fall off.

[0124] In the utility model, directly arrange the return device on the screw rod axle 7a, or directly process the return structure 7a-1 through the machine, arrange the transmission shaft 4 on the screw rod axle 7a, and the both are connected through the pre-tightening mechanism 6, and the transmission shaft 4 is arranged with the spline, ball and other parts that do not heat or heat little, and the transmission shaft 4 is coupled with the screw rod axle 7a, and the transmission shaft 4 transmits torque and rotational speed to the screw rod axle 7a, and the transmission shaft 4 is arranged with transmission heating parts, since the axial dimension of screw rod axle 7a is small, so the arrangement of the part will be more than the radial dimension of the wall thickness of screw rod axle 7a, facilitating the arrangement of the part.

[0125] In the utility model motion conversion structure 7, at least including rotary part and translational part, executor 1 includes motor and speed reduction and torque increasing mechanism, the translational part includes nut 7b and base 8, nut 7b is fixedly connected with base 8, and nut 7b and base 8 can select the connecting mode as required, and simultaneously, the positioning structure is arranged between base 8 and screw rod axle 7a in the utility model, the positioning structure includes base zero position boss 8b arranged on base 8 and screw rod positioning table 7a6 arranged at the end of screw rod axle 7a, the outer side surface of the side close to screw rod positioning table 7a6 of base zero position boss 8b is arc surface, simultaneously, the positioning structure and base positioning groove 8a in the utility model have angle relationship with part features on screw rod axle 7a and / or nut 7b, and the position calibration of screw rod axle 7a and nut 7b during installation is realized through the calibration of angle.

[0126] Meanwhile, the base 8 at least contains a circular portion, and the circular portion of the base 8 is independently matched with the dust cover 9 to complete dust prevention and sealing.

[0127] The base 8 can also include a contact portion, which is the base 81 structure described above. In the utility model, the base 81 in the base 8 is attached to the inner brake pad 10. The outer contour of the base 81 can be circular, oval, square, or consistent with the shape of the inner brake pad 10.

[0128] A plurality of base positioning grooves 8a are arranged on the base 81 of the base 8, which correspond to the shape of the base 8, and when the base 81 of the base 8 has a phase requirement, the base positioning groove 8a can be used to position the installation position of the base 8; meanwhile, the base 8 and the nut 7b are connected in interference in the utility model, the base 8 is provided with a side limiting groove, and has a rotation prevention function.

[0129] In subsequent use, the base positioning groove 8a is arranged, which plays a good position limiting role, the base positioning groove 8a and the side limiting groove are mutually calibrated, are used for positioning when the base 8 is installed, and ensure that the side ring seat 82 is installed in alignment on the nut 7b.

[0130] The utility model discloses a nut 7b and the split type design of base 8 can reduce the radial dimension of the caliper body cylinder hole 2-1, and be favorable to the reduction of the overall size of the caliper, the shape and size of the base 8 are changeable, and can be adapted to different types and sizes of friction plates.

[0131] The utility model discloses the mutual cooperation of base positioning groove 8a and positioning structure makes the connection of base 8 and nut 7b, the installation of screw shaft 7a on caliper body 2 all have same positioning structure, and easy to realize batch production.

[0132] The utility model discloses a nut 7b can be adapted to a plurality of bases 8 and then be adapted to different types and sizes of friction plates, and meanwhile, the base 8 has a positioning structure, and is easy to produce in batches.

[0133] In the utility model, the return structure 7a-1 is arranged at different positions, when the return structure 7a-1 is arranged on the screw shaft 7a, the return structure 7a-1 is arranged on the external thread raceway 7a01 of the steel ball circulation of the screw shaft 7a, the steel ball circulates on the raceway of the screw shaft 7a through the return structure 7a-1, the length of the screw shaft 7a is less than the length of the nut 7b, the first bearing 5 and the screw shaft are coaxially arranged, and the first bearing 5 is arranged above the screw shaft 7a, the transmission shaft 4 is connected with the screw shaft 7a through the spline, the transmission shaft 4 is arranged on the screw shaft 7a, a pre-tightening mechanism 6 is arranged between the transmission shaft 4 and the screw shaft 7a, and the pre-tightening mechanism 6 fixes the transmission shaft 4 and the screw shaft 7a together.

[0134] The return device is arranged on the screw shaft 7a, the axial dimension of the screw shaft 7a can be less than the axial dimension of the nut 7b, the planar needle bearing is arranged on one side of the screw shaft 7a, the radial space of the planar needle bearing can be increased, the axial dimension can be reduced, so that the axial dimension of the caliper assembly is reduced, and the space inside the ball screw shaft 7a is fully utilized.

[0135] The radial dimensions of the ball screw shaft 7a and the cylinder hole 2-1 can be reduced without changing the size of the thrust needle bearing, which is more conducive to the arrangement on the whole vehicle.

[0136] The pre-tightening mechanism 6 has multiple implementation schemes.

[0137] Option 1: The pre-tightening mechanism 6 may include an elastic retaining ring 6a, which has the function of retaining ring 6a and can also generate axial pre-tightening force.

[0138] Option 2: The pre-tensioning mechanism 6 also includes a disc spring 6c and a retaining ring 6a. The retaining ring 6a is installed in the annular groove 7a1 inside the lead screw shaft 7a, and the disc spring 6c is installed between the retaining ring 6a and the transmission shaft 4.

[0139] Option 3: The pre-tightening mechanism 6 also includes a retaining ring 6a, a flat washer, and a wave spring 6e.

[0140] Option 4: 6a retaining ring and 6f opposing wave spring.

[0141] When installing Schemes 3 and 4: the retaining ring 6a is installed in the annular groove 7a1 of the lead screw shaft 7a, and a flat washer and a wave spring 6e are arranged below it in sequence, or a counter-current wave spring 6f is arranged directly under the retaining ring 6a.

[0142] In addition, a caliper bushing 3 is provided at the connection between the drive shaft 4 and the brake caliper, which provides good installation protection.

[0143] Example 1:

[0144] like Figures 1 to 6 As shown, the brake caliper of this embodiment includes an actuator 1, a brake caliper, a brake pad, a brake disc 11, a dust cover 9, and a motion conversion structure 7: a drive shaft 4, a first bearing 5, an elastic retaining ring 6a, a lead screw 7a, a nut 7b, and a base 8.

[0145] The actuator 1 includes at least a motor and a speed reduction and torque amplification mechanism. The motor inputs torque, and the speed reduction and torque amplification mechanism is used to reduce the speed and increase the torque, inputting the torque to the rotating lead screw shaft 7a, which drives the lead screw shaft 7a to rotate.

[0146] In this embodiment, the base 8 has three base positioning slots 8a and the positioning surface 8c has a small outward tilt angle, which makes it convenient for the base 8 to be installed on the nut 7b. At the same time, the base zero-position boss 8b can be used to terminate the relative movement between the nut 7b and the lead screw.

[0147] The brake caliper assembly is a floating caliper structure. The brake caliper includes a caliper body 2. The caliper body 2 is provided with a cylinder bore 2-1. That is, the brake caliper assembly disclosed in this utility model has a cylinder bore 2-1 and a claw structure. The brake pad and brake disc 11 are installed in sequence in the claw structure.

[0148] The structure of the brake caliper and the motor and gear set in actuator 1 is as is known to those skilled in the art and will not be described in detail here.

[0149] likeFigure 1 As shown, the motion conversion structure 7 includes a screw shaft 7a, a nut 7b, and a base 8.

[0150] The screw shaft 7a is connected with the transmission shaft 4. In this embodiment, the rotating member is the screw shaft 7a, the translating member is the nut 7b, the inner wall of the translating member is provided with an inner spiral raceway matched with the outer spiral raceway of the rotating member, the outer wall of the translating member is provided with an anti-rotation boss or groove matched with the brake caliper cylinder hole 2-1, the end face of the translating mechanism is in contact with the inner brake pad 10, the transmission shaft 4 is installed on the screw shaft 7a, pre-tightened by the pre-tightening mechanism 6, and the needle roller bearing is arranged above the elastic retainer 6a.

[0151] As shown in the figure, Figures 2 to 5 The base 8 is provided with a base positioning groove 8a, a base zero position boss 8b, and a positioning face 8c.

[0152] The base 8 can be independently matched with the dust cover 9 to complete sealing and dust prevention.

[0153] The nut 7b is provided with a sleeve ring groove 7b1, the base 8 is sleeved on the nut 7b through the side ring seat 82, and the side positioning groove plays a good marking role, facilitating the mutual positioning of the base 8 and the nut 7b during installation.

[0154] The base zero position boss 8b and the screw positioning table 7a6 on the screw shaft 7a are mutually marked.

[0155] The positioning face 8c on the base 8 can prevent the base 8 from rotating relative to the nut 7b, and the positioning face 8c has a small outward inclination. The cooperation between the base 8 and the nut 7b is from clearance fit to interference fit, which on the one hand increases the reliability of the connection, and on the other hand the clearance fit in the initial stage facilitates the positioning of the base 8.

[0156] This embodiment is easy to install the nut 7b and the base 8, and install the nut 7b and the brake caliper cylinder hole 2-1, because it has a unique positioning structure: the base positioning groove 8a on the base 8 corresponds to the zero position boss, the base positioning groove 8a on the base 8 corresponds to the positioning face 8c, and the base positioning groove 8a corresponds to the anti-rotation boss of the nut 7b and the brake caliper cylinder hole 2-1. A series of positioning corresponding relationships facilitate positioning and installation, and are easy to realize mass production.

[0157] Embodiment two:

[0158] As shown in the figure, Figure 7 This embodiment two is basically the same as the first embodiment, the only difference is that the size of the base 8 in this embodiment is larger, which can adapt to larger brake pads. The shape of the base 8 can be regular square or circular, or irregular arc or consistent with the shape of the brake pad. Thanks to the split structure of the nut 7b and the base 8, one nut 7b can adapt to multiple bases 8 and thus adapt to different brake pads.

[0159] Case three:

[0160] As Figure 8 shown, the brake caliper at least includes an actuator 1, a brake caliper, a motion conversion structure 7, wherein: the actuator 1 at least includes a motor and a gear set, the actuator 1 is a mature technology, and details are not repeated here.

[0161] The motion conversion structure 7 is a ball screw shaft 7a, which at least includes a rotating part and a translating part, the rotating part is the screw shaft 7a, and the translating part is the nut 7b, the nut 7b is annular with openings at both ends, the cross section of the screw shaft 7a is H-shaped, the axial length of the screw shaft 7a is much smaller than the axial length of the nut 7b, which can reduce the material and the arrangement space of the screw shaft 7a in the nut 7b, facilitate the arrangement of the remaining parts, the nut 7b has an internal thread, the screw shaft 7a has an external thread, and the screw shaft 7a and the nut 7b have balls therebetween.

[0162] As Figure 9 shown, the screw shaft 7a is provided with a return device or a return track structure is directly machined, and the balls form a closed loop circulating track through the return structure 7a-1.

[0163] The outer wall of the nut 7b is provided with a boss, and the brake caliper cylinder hole 2-1 has a groove matched with the boss, which is used to prevent the nut 7b from rotating and ensure the linear motion of the nut 7b.

[0164] In addition, the nut 7b and the base 8 can adopt an integrated structure, or can be designed as a split structure, and the specific selection can be made according to the needs.

[0165] An annular groove 83 is arranged on the outer wall of the base 8 region, and the annular groove 83 is arranged to facilitate the connection and installation between the dust cover 9 and the base 8.

[0166] The brake caliper assembly is a floating caliper structure, has a cylinder hole 2-1 and a hook structure, and the hook structure is sequentially provided with an inner brake pad 10, a brake disc 11 and an outer brake pad 12.

[0167] As Figure 8 shown, the ball screw shaft 7a is arranged in the cylinder hole 2-1 of the brake caliper, the transmission shaft 4 is arranged on the screw shaft 7a, and the transmission shaft 4 is connected with the screw shaft 7a through the pre-tightening mechanism 6.

[0168] In addition, in this utility model, the transmission shaft 4 includes a transmission shaft body 41, on which a transmission end block 42 is provided; the transmission end block 42 is inserted into the upper relief groove 7a2; a spherical protrusion is provided at the end of the transmission end block 42 away from the transmission shaft body 41; in subsequent use, the transmission shaft 4 cooperates with the arc groove 7a5 in the adjustment groove through the spherical protrusion to form a spherical pair, which has a self-aligning function and eliminates braking tangential force.

[0169] Meanwhile, the pre-tightening mechanism 6 of this utility model uses a single-part elastic retaining ring 6a. The elastic retaining ring 6a is arranged in the annular groove 7a1 of the lead screw shaft 7a. A needle roller bearing is arranged on the transmission shaft 4. The needle roller bearing converts the sliding friction of the transmission shaft 4 into rolling friction, reducing friction loss and ensuring the smooth rotation of the transmission shaft 4.

[0170] Implementation Case 4:

[0171] like Figure 10 As shown, the difference between the structure of the brake caliper provided in this embodiment and the structure of the brake caliper provided in Embodiment 3 is that the preload mechanism 6 of the drive shaft 4 in this embodiment is different.

[0172] In this implementation, two parts are used: a retaining ring 6a and a disc spring 6c. The retaining ring 6a is installed in the annular groove 7a1 of the lead screw shaft 7a, and the disc spring 6c is arranged below the retaining ring 6a. This preload mechanism 6 has great stability. Since the transmission shaft 4 has a certain amount of movement, the disc spring 6c will not come out from under the retaining ring 6a during the shaking of the transmission shaft 4. At the same time, the connection of the disc spring 6c has a certain degree of reliability.

[0173] Implementation Case 5:

[0174] like Figures 11-12 As shown, the difference between the brake caliper structure provided in this embodiment and the brake caliper structures provided in embodiments three and four is that the preload mechanism 6 of the drive shaft 4 in this embodiment is different.

[0175] Figure 11 The system uses three parts: a wave spring 6e, a washer, and a retaining ring 6a. The retaining ring 6a is installed in the annular groove 7a1 of the lead screw shaft 7a. The washer and wave spring 6e are arranged in sequence below it. The retaining ring 6a provides positioning, the washer prevents the wave spring 6e from falling out of the retaining ring 6a and causing the preload mechanism 6 to fail, and the wave spring 6e is used to provide preload force. At present, the manufacturing process of the wave spring 6e is relatively perfect, and the magnitude of the preload force can be controlled.

[0176] Figure 12 In this design, the gasket and wave spring 6e are replaced with a counter-current wave spring 6f, which integrates the functions of both into one unit and reduces the number of parts.

[0177] Implementation Case Six:

[0178] likeFigure 13 The brake caliper provided by the embodiment is different from the brake caliper provided by the third embodiment in structure.

[0179] The transmission shaft 4 is divided into two parts, a torque transmission shaft 4a and a flange sleeve 4b, and an adjusting member 44 is arranged between the transmission shaft 4 and the screw shaft 7a.

[0180] The adjusting member 44 has a centering function, which eliminates the influence of the braking tangential force on the transmission shaft 4.

[0181] 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 motion conversion structure, characterized by, The screw shaft (7a) includes a ball circulation outer thread raceway (7a01); the screw shaft (7a) is provided with a return structure (7a-1); the return structure (7a-1) can at least realize that adjacent outer thread raceways (7a01) are connected to form a closed loop circulation raceway; the return structure (7a-1) is designed integrally or separately with the screw shaft (7a). The return structure (7a-1) includes an upward thread raceway (7a-11) arranged on the screw shaft (7a), and the upward thread raceway (7a-11) is used to connect adjacent two thread raceways.

2. A motion conversion structure according to claim 1, wherein The return structure (7a-1) includes a mounting groove arranged on the screw shaft (7a), a return device arranged in the mounting groove, and an upward thread raceway (7a-11) arranged in the return device; the upward thread raceway (7a-11) on the return device is used to connect adjacent two thread raceways.

3. A motion conversion structure according to claim 2, wherein The screw shaft (7a) includes a shaft body, and the shaft body is provided with an avoiding sink groove; the avoiding sink groove includes a lower avoiding sink groove (7a3) and an upper avoiding sink groove (7a2) arranged on the shaft body, and the lower avoiding sink groove (7a3) and the upper avoiding sink groove (7a2) are distributed at two ends of the shaft body.

4. A motion conversion structure according to claim 2, wherein The translation mechanism includes a nut (7b) and a base (8); the nut (7b) is connected with the brake pad through the base (8); 5. A motion conversion structure according to any one of claims 1 or 2, wherein The screw shaft (7a) and the base (8) are provided with a positioning structure; the positioning structure includes a base zero position boss (8b) arranged on the base (8) and a screw positioning table (7a6) arranged at an end of the screw shaft (7a), and an outer side surface of the base zero position boss (8b) close to the screw positioning table (7a6) is an arc surface.

6. A motion conversion structure according to any one of claims 1 or 2, wherein The nut (7b) and the base (8) in the translation mechanism are designed in a split type. The brake caliper includes a caliper body (2); the caliper body (2) is provided with at least one set of the motion conversion structure as claimed in any one of claims 1-4; 7. A motion conversion structure according to any one of claims 1 or 2, wherein The motion conversion structure can convert rotary motion into linear motion to make the brake pad move linearly; the actuator controls the rotation of the screw shaft (7a); the screw shaft (7a) can drive the translation mechanism to move linearly through the balls.

8. A brake caliper assembly comprising a brake caliper, a brake pad, and an actuator, characterized in that, The caliper body (2) is provided with a cylinder hole (2-1); the motion conversion structure is inserted into the cylinder hole (2-1); the actuator controls the operation of the motion conversion structure through a transmission shaft (4); the transmission shaft (4) includes a transmission shaft (4) body, and the transmission shaft (4) body is provided with a transmission end block (42); the transmission end block (42) is inserted into the upper avoiding sink groove (7a2). ​ 9. A brake caliper assembly according to claim 8, wherein, ​ 10. A brake caliper assembly according to claim 8, wherein, The upper avoiding groove (7a2) of the screw shaft (7a) is provided with a position adjusting groove (7-1), the position adjusting groove (7-1) comprises a calibration groove (7a4) and an arc-shaped groove (7a5), the calibration groove (7a4) extends from the upper avoiding groove (7a2) to one side of the lower avoiding groove (7a3), and the arc-shaped groove extends from the calibration groove (7a4) to one side of the lower avoiding groove (7a3).

11. A brake caliper assembly according to claim 9, wherein, The transmission end block (42) comprises an end block body, and an adjusting piece (44) is arranged on the end block body; one end of the adjusting piece (44) is inserted into the end block body, and the other end is inserted into the position adjusting groove (7-1); the adjusting piece (44) is movably connected with the end block body and the screw shaft (7a). The adjusting piece (44) comprises a middle section and spherical surfaces arranged at two ends of the middle section; the end block body is also provided with the position adjusting groove (7-1); one end of the adjusting piece (44) is arranged in the position adjusting groove (7-1) on the end block body, and the other end is arranged in the position adjusting groove (7-1) of the screw shaft (7a).

12. A brake caliper assembly according to claim 9, wherein, The transmission shaft (4) and the screw shaft (7a) are provided with a pre-tightening mechanism (6); the pre-tightening mechanism (6) comprises a stop ring (6a); an annular embedding groove (7a1) is arranged on the inner wall of the upper avoiding groove (7a2) of the screw shaft (7a), and the stop ring (6a) is embedded in the annular embedding groove (7a1) and is lapped on the transmission shaft (4).

13. A brake caliper assembly according to claim 12, wherein, The transmission end block (42) is provided with an annular groove (43); the stop ring (6a) is lapped on the transmission end block (42).

14. A brake caliper assembly according to claim 12, wherein, The pre-tightening mechanism (6) further comprises an elastic component; the elastic component comprises one or more of a disc spring (6c), a wave spring (6e) and a jacking wave spring (6f); the stop ring (6a) is lapped on the transmission shaft (4) through the elastic component.

15. A brake caliper assembly according to claim 12, wherein, The pre-tightening mechanism (6) further comprises a gasket (6d); the stop ring (6a) is connected with the elastic component through the gasket (6d).

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