Translation mechanism, motion conversion structure with translation mechanism and brake caliper assembly with translation mechanism

Abstract

The utility model relates to the field of brake calipers, in particular to a translation mechanism, a motion conversion structure with the translation mechanism and a brake caliper assembly with the translation mechanism. Comprising a nut and a base, and the nut and the base are designed in a split mode. Through the split design of the base and the nut, the base serves as a piston structure, the size of the nut can be reduced during subsequent use, the radial size of the cylinder hole is further reduced, meanwhile, the size and the model of the base can be changed according to needs during subsequent use, and therefore the application range of the hydraulic cylinder can be widened to a certain extent.

Description

TECHNICAL FIELD

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

[0002] At present, the mainstream brake scheme of the automobile market is the traditional hydraulic brake system, and with the development of automobile intelligence, it is an irresistible trend to replace the hydraulic brake system with an electronic mechanical brake system (EMB), which has a more simple system structure, is convenient to maintain, replaces the hydraulic pipeline with an electric wire circuit, realizes the transmission from the pedal signal to the actuator through an electronic signal, and has the characteristics of fast response, high efficiency, small size and light weight.

[0003] The EMB system generally drives the ball screw to move through a motor, drives the piston connected with the ball screw to reciprocate, and realizes clamping and releasing.

[0004] However, in the prior art, the piston is usually arranged outside the nut, and the piston is pushed through the linear motion of the nut; although this can realize braking, since the ball screw needs to be designed to have a large outer diameter to resist axial force, arranging the piston outside the nut greatly increases the inner diameter of the cylinder hole of the caliper body and increases the radial size of the caliper body.

[0005] In addition, since the ball screw has a cylindrical shape, the piston also has a cylindrical shape, and the shape of the piston is fixed and not suitable for different types and sizes of friction plates.

[0006] In addition, in CN116136243A and US20200158198A1; the ball screw mechanism realizes many functions and has many phase requirements with surrounding parts, but lacks positioning structures in the assembly process, it is difficult to realize automatic assembly, and batch production cannot be realized.

[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. Utility model content

[0008] The utility model aims at providing a translation mechanism for calipers, which can be suitable for different types of inner brake plates.

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

[0010] A translation mechanism, comprising a nut and a base, wherein the nut and the base are designed in a split type.

[0011] The nut comprises a nut body, the base comprises a base, and a side edge ring seat is arranged on the base.

[0012] The nut is connected with the base through a connecting mechanism;

[0013] The connecting mechanism comprises a sleeve ring groove arranged at the end of the nut body;

[0014] The base is sleeved on the sleeve ring groove of the nut body through the side ring seat.

[0015] The side ring seat is provided with a side limiting groove; the side limiting groove forms a limiting surface on the inner wall of the side ring seat.

[0016] The limiting surface is arranged obliquely.

[0017] The base is provided with a base limiting groove away from the nut.

[0018] The outer side of the nut body is provided with an anti-rotation boss or groove; the base limiting groove corresponds to the anti-rotation boss or groove on the outer side of the nut body.

[0019] The horizontal projection of the base is one of a rectangle, a circle or a polygon.

[0020] A motion conversion structure comprises a lead screw shaft, a ball and a translation mechanism; the ball is arranged between the lead screw shaft and the translation mechanism;

[0021] The motion conversion structure further comprises a return structure; the return structure is arranged on the nut in the lead screw shaft or the translation mechanism.

[0022] The lead screw shaft comprises a shaft body, the shaft body is provided with an avoiding groove; the avoiding groove comprises a lower avoiding groove and an upper avoiding groove arranged on the shaft body, and the lower avoiding groove and the upper avoiding groove are distributed at both ends of the shaft body.

[0023] A positioning structure is arranged between the lead screw shaft and the base; the positioning structure comprises a base zero position boss arranged on the base and a lead screw positioning table arranged at the end of the lead screw shaft, and the outer side surface of the side of the base zero position boss close to the lead screw positioning table is an arc surface.

[0024] A brake caliper assembly comprises a brake caliper, a brake pad and an actuator, the brake caliper comprises a caliper body; at least one set of the motion conversion structure is arranged in the caliper body;

[0025] The motion conversion structure can convert rotary motion into linear motion to make the brake pad move linearly.

[0026] The actuator controls the rotation of the lead screw shaft; the lead screw shaft can drive the translation mechanism to move linearly through the ball.

[0027] 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 cylinder hole is connected with the nut in the motion conversion structure through a limiting mechanism; the limiting mechanism includes a boss or a groove provided on the nut, and a groove or a boss corresponding to the boss or the groove on the nut is provided on the inner wall of the cylinder hole.

[0028] The brake caliper assembly further comprises a bearing mechanism; the bearing mechanism comprises a first bearing arranged on the screw shaft; the first bearing is arranged in the upper avoiding groove or the upper avoiding groove of the screw shaft.

[0029] The upper avoiding groove of the 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; the arc-shaped groove extends from the calibration groove to one side of the lower avoiding groove.

[0030] 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.

[0031] 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; the adjusting piece is movably connected with the end block body and the screw shaft.

[0032] The adjusting piece comprises a middle section and spherical surfaces arranged at both 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 screw shaft.

[0033] The pre-tightening mechanism is arranged between the transmission shaft and the screw shaft; the pre-tightening mechanism comprises a check ring; an annular embedding groove is arranged on the inner wall of the upper avoiding groove of the screw shaft, and the check ring is embedded in the annular embedding groove and is lapped on the transmission shaft.

[0034] The transmission end block is provided with an annular groove; the check ring is lapped on the transmission end block.

[0035] 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 counter-top wave spring; the check ring is lapped on the transmission shaft through the elastic component.

[0036] The pre-tightening mechanism further comprises a gasket; the check ring is connected with the elastic component through the gasket.

[0037] The side surface of the base is connected with the caliper body through a dust cover.

[0038] The transmission shaft and the screw shaft are connected through a spline mechanism.

[0039] The return structure is realized by machining or installing a return device.

[0040] The utility model discloses the advantages in that:

[0041] The utility model discloses a translation mechanism, motion conversion structure with the translation mechanism and brake caliper assembly with the translation mechanism.

[0042] The utility model discloses a base and the split type design of nut, and the base acts as piston structure, can reduce the size of nut in subsequent use, and then reduce the radial size of cylinder hole, and simultaneously, can change the size and model of base according to the need in subsequent use, thereby can improve the application scope of the utility model to a certain extent.

[0043] The utility model discloses motion conversion structure, through the setting of positioning structure, can guarantee the accuracy of motion conversion structure whole installation. DRAWINGS

[0044] The following is a brief description of the contents expressed by each drawing of the utility model specification and the marks in the drawing:

[0045] Figure 1 The utility model discloses brake caliper assembly of example one.

[0046] Figure 2 The utility model discloses the structure schematic view of translation mechanism.

[0047] Figure 3 The utility model discloses the bottom view of base.

[0048] Figure 4 The utility model discloses the top view of base.

[0049] Figure 5 The utility model discloses the section view of base.

[0050] Figure 6 The utility model discloses Figure 5 The utility model discloses the structure schematic view of translation mechanism in example two.

[0051] Figure 7 The utility model discloses the structure schematic view of translation mechanism in example two.

[0052] Figure 8 The utility model discloses brake caliper assembly of example three.

[0053] Figure 9 The utility model discloses the structure schematic view of return structure on screw shaft.

[0054] Figure 10The structure schematic view of the pre-tightening mechanism adopting the stop ring, the gasket and the wave spring is shown in the utility model.

[0055] Figure 11 The structure schematic view of the pre-tightening mechanism adopting the stop ring, the gasket and the wave spring is shown in the utility model.

[0056] Figure 12 The structure schematic view of the pre-tightening mechanism adopting the stop ring, the gasket and the wave spring is shown in the utility model.

[0057] Figure 13 The brake caliper assembly disclosed in the sixth embodiment of the utility model.

[0058] The marks in the above-mentioned drawings are as follows:

[0059] 1, actuator; 2, caliper body; 2-1, cylinder hole, 3, caliper 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, stop ring; 6b, double-layer stop 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, position adjusting sink, 7a1, annular embedding, 7a2, upper avoiding sink; 7a3, lower avoiding sink; 7a4, calibration sink; 7a5, arc-shaped groove; 7a6, lead screw positioning table; 7b, nut; 8, base; 81, base; 82, side edge 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

[0060] The specific embodiments of the utility model are further explained in detail by comparing the drawings and describing the optimal embodiments.

[0061] A translation mechanism, including nut 7b, base 8, the nut 7b and base 8 adopt split design;The utility model discloses through the split design of base 8 and nut 7b, base 8 acts as 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, simultaneously, in subsequent use, the size and model of base 8 can be changed according to the needs, so that the application range of the utility model can be improved to a certain extent.

[0062] The translation mechanism disclosed by the utility model is essentially the translation part in the motion conversion structure 7; the translation mechanism disclosed by the utility model mainly comprises a nut 7b, the nut 7b is the translation part in the screw shaft 7a mechanism, 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.

[0063] In addition, the nut 7b is connected with the base 8 in the utility model, the base 8 is equivalent to a piston structure, under the premise that the screw shaft 7a is driven to rotate by the actuator 1, the base 8 can move linearly along the axial direction, so that the position of the inner brake pad 10 is changed, finally the inner brake pad 10 and the outer brake pad 12 are moved 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.

[0064] In the utility model, the nut 7b and the base 8 adopt a split design; in this way, the nut 7b and the base 8 can be selected according to the corresponding model and size, so that the translation mechanism disclosed by the utility model is applicable to brake pads of different models.

[0065] In addition, the nut 7b is arranged in the cylinder hole 2-1 of the caliper body 2 in the utility model, the nut 7b is connected with the inner brake pad 10 through the base 8, in subsequent use, the movement of the nut 7b can drive the movement of the base 8, and then the movement of the inner brake pad 10 is driven.

[0066] Further, the nut 7b comprises a nut body in the utility model; the nut body is the main structure of the nut 7b, and the base 8 comprises a base 81 in the utility model; a side ring seat 82 is arranged on the base 81; the base 81 is a basic plate structure, the side ring seat 82 is arranged at the periphery of the base 81, and the side ring seat 82 is an annular seat structure; in use, the base 8 is conveniently sleeved on the nut 7b through the side ring seat 82, and then the connection between the nut 7b and the base 8 is realized.

[0067] In addition, the nut 7b and the base 8 are connected through a connecting mechanism in the utility model; the connecting mechanism facilitates the connection between the nut 7b and the base 8; the connecting mode can be interference fit type sleeving, or welding, screwing or other connecting modes.

[0068] 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 ring seat; the utility model forms a stepped platform on the outer side of the nut body through the arrangement of the sleeving ring groove 7b1, which facilitates the mutual positioning of the nut 7b and the base 8 during installation.

[0069] Further, the side edge ring seat 82 is provided with a side limiting groove in the utility model; the side limiting groove forms a positioning surface 8c on the inner wall of the side edge ring seat 82; the side limiting 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 can guarantee the positioning of the base 8 and the nut 7b during installation, but also has certain anti-rotation capacity.

[0070] Further, the positioning surface 8c is inclinedly arranged in the utility model; based on such arrangement, the inner wall of the side edge ring seat 82 has a bevel, and further makes the side edge ring seat 82 surround a groove body with a large upper end opening and a small lower end opening; further, the sleeving installation of the base 8 on the nut 7b is facilitated.

[0071] Further, the base 81 is provided with a base positioning groove 8a on the side away from the nut 7b in the utility model; the base positioning groove 8a can control the position and orientation of the base 81 during subsequent assembly, so that the installation and placement position of the base 8 can be guaranteed.

[0072] The shape, structure and number of the base positioning groove 8a in the utility model can be selected as required, which can mainly cooperate with the positioning member to control the placement position of the base 8, and generally three base positioning grooves 8a can be provided, and the three base positioning grooves 8a are distributed in a triangular shape; of course, other arrangement modes can also be selected.

[0073] A motion conversion structure 7, including a lead screw shaft 7a, a ball and the translation mechanism; the ball is arranged between the lead screw shaft 7a and the translation mechanism region; the motion conversion structure 7 disclosed in the utility model can convert rotary motion into linear motion to make the brake pad connected with the motion conversion structure 7 move linearly; the clamping and releasing operation of the caliper in actual use is realized.

[0074] In the utility model, the lead screw shaft 7a is connected with a transmission shaft 4, the transmission shaft 4 can drive the lead screw shaft 7a to rotate, under the transmission of the ball, the lead screw shaft 7a has a tendency to drive the translation mechanism to rotate, but because the nut 7b is provided with a 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 lead screw shaft 7a, the nut 7b will move linearly along the axial direction of the lead screw shaft 7a, so that the nut 7b drives the base 8, and further realizes the movement of the base 8 connected with the brake pad.

[0075] Meanwhile, the motion conversion structure 7 further comprises a return structure 7a-1; the return structure 7a-1 is mainly used for circulating rolling of the ball bearing, and the return structure 7a-1 is arranged on the screw shaft 7a or the nut 7b in the translation mechanism; based on the arrangement, the ball bearing is circulated on the rolling way of the screw shaft 7a or the nut 7b through the return structure 7a-1.

[0076] When the return structure 7a-1 is arranged on the screw shaft 7a, the return structure 7a-1 is arranged on the outer thread rolling way of the screw shaft 7a ball circulation; the return structure 7a-1 is realized by machining or installing a return device; the axial length of the screw shaft 7a can be smaller than the axial length of the nut 7b through the movement of the return structure 7a-1 on the screw shaft 7a in subsequent use.

[0077] By arranging the return structure 7a-1 on the screw shaft 7a, the axial size of the screw shaft 7a can be smaller than the axial size of the nut 7b, which saves materials on the one hand, and on the other hand, the screw shaft 7a is arranged in parallel with the first bearing 5, the wall thickness size 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 size of the screw shaft 7a is reduced, and the screw shaft 7a can be smaller; thereby the axial size of the caliper assembly is reduced, and the space inside the screw shaft 7a is fully utilized.

[0078] When the return structure 7a-1 is arranged on the nut 7b, the specific structure is not described here.

[0079] Further, the return device is installed on the screw shaft 7a or a return track structure is directly machined in the utility model, and the ball bearing forms a closed loop circulating rolling way through the return structure 7a-1.

[0080] Specifically, the outer thread rolling way of the ball bearing circulation is arranged on the screw shaft in the utility model; the outer thread rolling way is generally designed as a downward rotating rolling way structure; and the return structure is arranged on the screw shaft in the utility model; the return structure can at least realize the connection and communication of adjacent outer thread rolling ways to form a closed loop circulating rolling way; based on the arrangement, the circulating rolling operation of the ball bearing can be realized.

[0081] The return structure and the screw shaft are designed integrally or separately in the utility model; the integral design generally means that the return structure is directly arranged on the screw shaft, for example, an upward thread rolling way is directly arranged on the screw shaft in the following.

[0082] The separate design generally means that an additional return device is arranged on the screw shaft, and the connection and communication of adjacent thread rolling ways are realized through the upward thread rolling way on the return device.

[0083] The two design modes have specific technical effects, the return structure is directly machined on the screw shaft, the integrity of the return structure and the screw shaft can be ensured, subsequent installation procedures are simplified, the return structure machining difficulty is reduced, and the return device machining efficiency is improved.

[0084] Specifically, the return structure includes an upward thread raceway arranged on the screw shaft, and the upward thread raceway is used to connect adjacent two thread raceways.

[0085] The return structure includes an installation groove arranged on the screw shaft, the installation groove is provided with a return device, 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, the return device is essentially a shell structure with a semicircular cross section, the upward thread raceway on the return device has good connection and communication functions, thereby forming a closed loop circulation raceway, and the circulation rolling of the ball in the closed loop circulation raceway is realized.

[0086] In addition, upward and downward in the foregoing are based on the description of the drawings; upward and upward and downward do not have specific limiting meanings.

[0087] Further, the screw shaft 7a includes a shaft body, the shaft body is a main structure of the screw shaft 7a, and the shaft body is provided with an avoiding groove in the utility model.

[0088] Specifically, the avoiding groove includes a lower avoiding groove 7a3 and an upper avoiding groove 7a2 arranged on the shaft body, and the lower avoiding groove 7a3 and the upper avoiding groove 7a2 are distributed at two ends of the shaft body.

[0089] Further, the screw shaft 7a and the base 8 are provided with a positioning structure.

[0090] Specifically, the positioning structure comprises a base zero-position boss 8b arranged on the base 8 and a lead screw positioning table 7a6 arranged at the end of the lead screw shaft 7a, and the base zero-position boss 8b and the lead screw positioning table 7a6 serve as mutual calibration in the utility model, thereby ensuring mutual calibration when the lead screw shaft 7a is installed on the base 8.

[0091] Meanwhile, the outer side surface of the base zero-position boss 8b near the lead screw positioning table 7a6 is arc-shaped in the utility model, which can avoid affecting the normal rotation of the lead screw shaft 7a due to the arrangement of the base zero-position boss 8b and the lead screw positioning table 7a6.

[0092] A brake caliper assembly comprises a brake caliper, a brake pad and an actuator 1, the brake caliper comprises a caliper body 2; at least one set of movement conversion structures 7 are arranged in the caliper body 2; the movement conversion structures 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.

[0093] The utility model discloses a brake caliper assembly mainly is a floating type caliper assembly.

[0094] Specifically, the utility model discloses a brake caliper assembly mainly comprises a brake caliper, a brake pad and an actuator 1, the brake caliper is the main body structure of brake caliper assembly, and the actuator 1 includes input element, controller and transmission shaft 4; the setting of actuator 1 is mainly used for driving the rotation of lead screw shaft 7a, so, in use, as long as actuator 1 can drive the rotation of lead screw shaft 7a, it can be used in the utility model.

[0095] Meanwhile, the brake pad is a brake pad in the utility model, and is generally divided into an inner brake pad 10 and an outer brake pad 12 based on different arrangement positions, and is arranged on the opposite sides of the brake disc 11 respectively, and subsequent clamping and friction of the brake disc 11 by the inner brake pad 10 and the outer brake pad 12 can realize the braking operation of the brake disc 11.

[0096] In addition, the movement conversion structure 7 in the utility model is a planetary ball screw shaft 7a mechanism.

[0097] The motion conversion structure 7 includes a lead screw shaft 7a, a nut 7b and a ball, the nut 7b is sleeved on the lead screw shaft 7a, the ball is 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 ball, 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 translational part.

[0098] Meanwhile, the brake caliper assembly comprises a caliper body 2, the caliper body 2 is a main structure of the brake caliper, generally referring to the structure above the hook claw, and at least one set of motion conversion structures 7 capable of converting rotary motion into linear motion to enable the brake pad to move linearly is arranged in the caliper body 2; based on the above statement, it can be known that the number of the motion conversion structures 7 can be set to achieve the use of brake caliper assemblies of different cylinder bodies, such as a double-cylinder brake caliper assembly.

[0099] In addition, in order to ensure the linearity of the motion of the nut 7b, the cylinder hole 2-1 is required to be connected with the nut 7b in the motion conversion structure 7 through a limiting mechanism in the utility model, and the limiting mechanism is arranged to facilitate the rotation limiting of the nut 7b.

[0100] 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 nut 7b is provided with the boss, 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; in the same way, when the nut 7b is provided with the groove, the boss is arranged on the inner wall of the cylinder hole 2-1, and based on the arrangement, the rotation of the nut 7b in the cylinder hole 2-1 is limited.

[0101] 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, and the cylinder hole 2-1 is equivalent to forming an inner cavity structure in the caliper body 2, thereby facilitating the installation and arrangement of the motion conversion structure 7 in the caliper body 2.

[0102] Further, the brake caliper assembly further comprises a bearing mechanism, the bearing mechanism plays a good supporting and limiting role in the utility model, and is mainly used for bearing the reverse thrust of the brake clamping force in subsequent use.

[0103] Specifically, the bearing mechanism includes a first bearing 5 arranged on the lead screw shaft 7a; 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.

[0104] Further, in the utility model, the upper avoiding sink groove 7a2 of the lead screw shaft 7a is equipped with a position adjusting sink groove 7-1, the position adjusting sink groove 7-1 is mainly used in cooperation with the convex of the end of the transmission shaft 4.

[0105] In addition, in the utility model, the position adjusting sink groove 7-1 includes 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 ladder groove structure is formed through the upper avoiding sink groove 7a2, the calibration sink groove 7a4 and the arc-shaped groove 7a5, and such a structure 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 during use.

[0106] Further, in the utility model, the transmission shaft 4 includes a transmission shaft body 41, the transmission shaft body 41 is equipped with a transmission end block 42; the transmission end block 42 is inserted into the upper 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, facilitating the subsequent use, the transmission shaft 4 and the lead screw shaft 7a have multiple positioning points, better ensuring the contact area of the transmission shaft 4 and the lead screw shaft 7a, thereby better ensuring the stability and accuracy of the connection of the transmission shaft 4 and the lead screw shaft 7a.

[0107] In addition, in the utility model, 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.

[0108] Further, in the utility model, the transmission end block 42 includes 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 position 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, in the utility model, the adjusting piece 44 includes a middle section 441 and spherical surfaces 442 arranged at both ends of the middle section 441; the end block body is also equipped with the position adjusting sink groove 7-1; one end of the adjusting piece 44 is arranged in the position adjusting sink groove 7-1 on the end block body, and the other end is arranged in the position adjusting sink groove 7-1 of the lead screw shaft 7a; based on such a structure, the adjusting piece 44, the end block body and the lead screw shaft 7a form a double spherical surface pair mechanism.

[0109] The adjusting piece 44 has a centering function, and eliminates the influence of the braking tangential force on the transmission shaft 4.

[0110] In the utility model, the transmission end block 44 comprises an end block body and the adjusting piece 44; in the utility model, the end block body and the adjusting piece 44 can be required to be integrated structures according to actual production needs, or can be designed in a split type as mentioned above, and the specific design mode can be selected according to working conditions.

[0111] Further, in the utility model, the pre-tightening mechanism 6 is arranged between the transmission shaft 4 and the lead screw shaft 7a; 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.

[0112] Meanwhile, in the utility model, the pre-tightening mechanism 6 comprises a retaining ring 6a; an annular embedding groove 7a1 is arranged on the inner wall of the upper avoiding sink groove 7a2 on the lead screw shaft 7a, the retaining ring 6a is embedded in the annular embedding groove 7a1 and is lapped on the transmission shaft 4; the retaining ring 6a plays a role of longitudinal limiting and avoids the disengagement between the lead screw shaft 7a and the transmission shaft 4.

[0113] The annular embedding groove 7a1 is arranged on the inner wall of the upper avoiding sink groove 7a2.

[0114] Further, in the utility model, the annular sink groove 43 is arranged on the transmission end block 42; the retaining ring 6a is lapped on the transmission end block 42; the annular sink groove 43 is arranged on the side surface of the transmission end block 42, and the annular sink groove 43 forms a stepped platform on the transmission end block 42, so that the lapping of the retaining ring 6a on the transmission end block 42 is facilitated.

[0115] Meanwhile, the retaining ring 6a can also be a double-layer retaining ring 6b.

[0116] Further, in the utility model, the pre-tightening mechanism 6 further comprises an elastic component; the utility model can provide mounting pre-tightening force for the transmission shaft 4 and the lead screw shaft 7a through the arrangement of the elastic component.

[0117] In addition, in the utility model, the elastic component comprises one or more of a disc spring 6c, a wave spring 6e and a counteracting wave spring 6f; the retaining ring 6a is lapped on the transmission shaft 4 through the elastic component; in the utility model, the disc spring 6c, the wave spring 6e and the counteracting wave spring 6f generate elastic potential energy through the deformation of themselves, so that the transmission shaft 4 and the lead screw shaft 7a have stable mounting pre-tightening force.

[0118] Further, the pre-tightening mechanism 6 further comprises a gasket 6d in the utility model; the check ring 6a is connected with the elastic component through the gasket 6d; the gasket 6d plays a good blocking role, the gasket 6d is generally used in cooperation with the wave spring 6e, the check ring 6a provides positioning, the gasket 6d prevents the wave spring 6e from coming out of the check ring 6a to make the pre-tightening mechanism 6 ineffective, the wave spring 6e is used to provide pre-tightening force, and the manufacturing process of the wave spring 6e is relatively perfect at present, and the size of the pre-tightening force is controllable.

[0119] Further, the base 8 side is connected with the caliper body 2 through the dust cover 9 in the utility model; one end of the dust cover 9 is connected on the caliper body 2, and the other end is connected on the base 8; the sealing property of the brake caliper is guaranteed.

[0120] Further, the transmission shaft 4 is connected with the lead screw shaft 7a through the spline mechanism in the utility model; the setting of the spline mechanism in the utility model facilitates the connection between the transmission shaft 4 and the lead screw shaft 7a, and the rotation of the transmission shaft 4 can stably drive the lead screw shaft 7a to rotate.

[0121] Specifically,

[0122] 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, is used for input torque, reduces the rotating speed, the rotating piece of motion conversion structure 7 is lead screw shaft 7a, the translation piece is nut 7b, nut 7b is fixedly connected with base 8, and the positioning structure is arranged between nut 7b and base 8, which facilitates positioning installation, base 8 directly acts as a piston, and a sealing groove is processed on base 8, a sealing structure needs to be installed to prevent motion conversion structure 7 from contacting the outside, motion conversion structure 7 converts the torque and rotating speed of rotating piece into the linear motion and thrust of translation piece, and directly pushes the brake pad to clamp the brake disc 11.

[0123] In the prior art, the radial dimension of the electronic mechanical brake caliper cylinder hole 2-1 is relatively large, and the reason is that: in the existing EMB scheme, the piston is arranged outside the nut 7b of the ball screw shaft 7a, and the piston occupies a certain radial space, in order to meet the arrangement of the ball screw shaft 7a and the piston, the cylinder hole 2-1 in the caliper body needs to be machined to be very large, a kind of ball screw shaft 7a can only adapt to one kind of piston, and only a single brake pad is applicable; in addition, the ball screw structure does not have a positioning structure, and it is difficult to realize mass production.

[0124] The utility model has the advantages that through the split type connecting structure of the nut 7b of the ball screw shaft 7a and the base 8, the radial dimension of the caliper cylinder hole 2-1 can be reduced, the nut 7b of the ball screw shaft 7a can be adapted to various bases 8 and thus adapted to brake pads of different types and sizes; meanwhile, the base 8 has a positioning structure, which facilitates positioning installation and is suitable for mass production.

[0125] The utility model discloses a nut 7b and base 8 are set to split type connection, one nut 7b can adapt to multiple base 8, and the brake caliper does not need to change, and the base 8 is arranged between the nut 7b and the brake pad, and the matching surface of nut 7b and base 8 has cylindrical surface and locating surface 8c, and the locating surface 8c has a small inclination angle inward, and the cylindrical surface is interference connection, and the locating surface 8c is interference fit at the root between the locating surface 8c, and also can play the anti -rotation effect.

[0126] On this basis, plus welding or riveting, can guarantee the stability of the base 8 and the nut 7b connection, and the base 8 acts as the role of piston.

[0127] In addition, the screw rod end face has the screw rod locating platform 7a6 with the inside of base 8 and each other cooperation, and generally speaking, the nut 7b is installed in the outside of screw rod shaft 7a, and the nut 7b has internal thread or inner raceway, and the screw rod shaft 7a has external thread or outer raceway, and the radial dimension of nut 7b can be considered as the radial dimension of motion conversion structure 7.

[0128] That is, the split type connection of base 8 and nut 7b, the base 8 acts as the piston, and the piston does not occupy the radial space additionally.

[0129] Further, the utility model discloses the outside of nut body is equipped with anti -rotation boss or recess, the base locating groove with anti -rotation boss or recess on the outside of nut body corresponds, and in the utility model, the outside of nut body is equipped with anti -rotation boss or recess and can cooperate boss or recess on the cylinder hole 2-1 and use, guarantee the linearity of motion when using subsequently.

[0130] Meanwhile, the base locating groove with anti -rotation boss or recess on the outside of nut body corresponds in the utility model, and the utility model is based on the above design, and the base locating groove has the fixed design direction, and the anti -rotation boss or recess on the outside of nut body also has the corresponding anti -rotation direction, and the utility model requires that the base locating groove with anti -rotation boss or recess on the outside of nut body corresponds, and in subsequent use, the base locating groove can be limited to the direction, realizes the limitation of nut installation position, reduces the installation interference of adjacent components when installing subsequently.

[0131] On the other hand, the base 8 has at least one base positioning slot 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 slot 8a, which is used for positioning when the motion conversion structure 7 is installed, so 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 slot 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 slot 8a.

[0132] Meanwhile, in the utility model, the base positioning slot 8a and the positioning structure are provided, which play a calibration role; when the position of the base 8 is determined through the base positioning slot 8a, the position limitation of the nut 7b and the lead screw shaft 7a during installation can be realized by cooperating with the positioning structure.

[0133] Further, in the utility model, the horizontal projection of the base is one of a rectangle, a circle or a polygon; in other words, the style of the base can be variable during use of the utility model, and specifically, the base can be designed according to the shape of the brake pad, and the essential purpose is to ensure the contact area between the base and the corresponding brake pad and the stability of the connection between the base and the corresponding brake pad.

[0134] In addition, in the utility model, the return device can be arranged on the lead screw shaft 7a or the nut 7b as required; when the return structure 7a-1 is arranged on the nut 7b, it belongs to a conventional structure, which will not be described here; when the return structure 7a-1 is arranged on the lead screw shaft 7a, the return structure 7a-1 forms a ball closed loop circulation on the lead screw shaft 7a, the transmission shaft 4 is arranged on the lead screw shaft 7a, the transmission shaft 4 and the lead screw shaft 7a are connected through the pre-tightening mechanism 6, the transmission shaft 4 transmits torque and rotational speed to the lead screw shaft 7a, the motion conversion structure 7 converts the torque and rotational speed of the rotating part into linear motion and thrust of the translating part, and directly pushes the brake pad to clamp the brake disc 11.

[0135] In the prior art, the axial size of the lead screw shaft 7a in the electronic mechanical brake caliper is relatively large, and the reason is that: in the existing EMB scheme, the return device 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 size of the lead screw shaft 7a needs to be at least greater than the sum of the axial size of the closed loop ball circulation and the axial size of the linear stroke of the nut 7b, which makes the axial size of the lead screw shaft 7a large.

[0136] 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.

[0137] 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.

[0138] 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 at the same time, 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 of the side close to screw rod positioning table 7a6 of base zero position boss 8b is arc surface, and at the same time, 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.

[0139] At the same time, the circular part of base 8 independently cooperates with dust cover 9 to complete dust prevention and sealing.

[0140] 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.

[0141] 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 in interference connection in the utility model, the base 8 is provided with a side limiting groove, and has a rotation prevention function.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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 of the steel ball cycle 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.

[0147] 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.

[0148] The radial dimensions of the ball screw shaft 7a and the cylinder hole 2-1 can be reduced under the condition that the size of the thrust needle bearing is unchanged, which is more favorable for arrangement on the whole vehicle.

[0149] The pre-tightening mechanism 6 has multiple implementation schemes.

[0150] 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.

[0151] 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.

[0152] Option 3: The pre-tightening mechanism 6 also includes a retaining ring 6a, a flat washer, and a wave spring 6e.

[0153] Option 4: 6a retaining ring and 6f opposing wave spring.

[0154] 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.

[0155] 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.

[0156] Example 1:

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] like Figure 1As shown, the motion conversion structure 7 includes a screw shaft 7a, a nut 7b, and a base 8.

[0163] 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.

[0164] As shown in 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.

[0165] The base 8 can be independently matched with the dust cover 9 to complete sealing and dust prevention.

[0166] The nut 7b is provided with a sleeve ring groove 7b1, and 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.

[0167] The base zero position boss 8b and the screw positioning table 7a6 on the screw shaft 7a are mutually marked.

[0168] 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, and 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.

[0169] 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.

[0170] Embodiment two:

[0171] As shown in Figure 7 This embodiment two is basically the same as the first embodiment, the only difference is that the size of the base 8 of 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.

[0172] Case three:

[0173] 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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] An annular groove 83 is arranged on the outer wall of the base 8 region; the annular groove 83 is arranged, which facilitates the connection and installation between the dust cover 9 and the base 8.

[0179] 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.

[0180] As Figure 8 shown, the ball screw shaft 7a is arranged in the cylinder hole 2-1 of the brake caliper, a transmission shaft 4 is arranged on the screw shaft 7a, and the transmission shaft 4 is connected with the screw shaft 7a through a pre-tightening mechanism 6.

[0181] In addition, in the utility model, the transmission shaft 4 includes a transmission shaft body 41, the transmission shaft body 41 is provided with a transmission end block 42, the transmission end block 42 is inserted into the upper avoiding sink groove 7a2, a spherical protrusion is arranged on the end of the transmission end block 42 away from the transmission shaft body 41, and in subsequent use, the transmission shaft 4 is matched with the arc-shaped groove 7a5 in the adjusting sink groove through the spherical protrusion, a spherical pair is formed, has the aligning function, and the tangential force of braking is eliminated.

[0182] Meanwhile, the pre-tightening mechanism 6 of the transmission shaft 4 in the utility model is single-part elastic check ring 6a, which is arranged in the annular embedding groove 7a1 of the screw shaft 7a, and the rolling needle bearing is arranged on the transmission shaft 4, which converts the sliding friction of the transmission shaft 4 into rolling friction, reduces the loss of friction, and ensures the stable rotation of the transmission shaft 4.

[0183] Case four:

[0184] As shown in the figure, the structure of the brake caliper provided by the embodiment is different from the structure of the brake caliper provided by the third embodiment. Figure 10 In the embodiment, double parts, check ring 6a and disc spring 6c, are used, the check ring 6a is installed in the annular embedding groove 7a1 of the screw shaft 7a, and the disc spring 6c is arranged below the check ring 6a, the pre-tightening mechanism 6 has great stability, and the disc spring 6c will not be detached from the check ring 6a during the shaking of the transmission shaft 4, and the connection of the disc spring 6c has certain reliability.

[0185] Case five:

[0186] As shown in the figure, the structure of the brake caliper provided by the embodiment is different from the structures of the brake calipers provided by the third and fourth embodiments.

[0187] Figures 11-12 In the embodiment, three parts, wave spring 6e, gasket and check ring 6a, are used, the check ring 6a is installed in the annular embedding groove 7a1 of the screw shaft 7a, and the gasket and wave spring 6e are arranged below the check ring 6a in sequence, the check ring 6a provides positioning, the gasket prevents the wave spring 6e from being detached from the check ring 6a to make the pre-tightening mechanism 6 invalid, and the wave spring 6e is used to provide pre-tightening force, and the manufacturing process of the wave spring 6e is relatively perfect, and the size of the pre-tightening force is controllable.

[0188] Figure 11 In the embodiment, the gasket and wave spring 6e are replaced by the opposite wave spring 6f, which can integrate the functions of the two and reduce the number of parts.

[0189] Figure 12 Case six:

[0190] As shown in the figure, the structure of the brake caliper provided by the embodiment is different from the structure of the brake caliper provided by the third embodiment.

[0191] As shown in the figure, the structure of the brake caliper provided by the embodiment is different from the structure of the brake caliper provided by the third embodiment. Figure 13

[0192] ​​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, the adjusting member 44 is composed of two spherical surfaces at two ends and a middle section 441 between the two spherical surfaces, the two spherical surfaces 442 at two ends of the adjusting member 44 are respectively in contact with adjacent counterparts to form a double spherical surface pair mechanism.

[0193] The adjusting member 44 has a aligning function, which eliminates the influence of the braking tangential force on the transmission shaft 4, the pre-tightening mechanism 6 of the transmission shaft 4 and the screw shaft 7a is a disc spring 6c, the disc spring 6c is arranged in the annular embedding groove 7a1 of the screw shaft 7a to pre-tighten the transmission shaft 4, the flange sleeve is arranged on the transmission shaft 4, and a needle bearing is further arranged on the flange sleeve.

[0194] Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, and various non-substantial improvements made by adopting the method concept and technical scheme of the utility model are within the protection scope of the utility model.

Claims

1. A translation mechanism characterized by, The nut and the base are designed in a split type.

2. The translation mechanism according to claim 1, wherein, The nut comprises a nut body; the base comprises a base seat; and the base seat is provided with a side edge ring seat. The nut and the base are connected through a connecting mechanism. The connecting mechanism comprises a sleeve joint ring groove arranged at the end of the nut body. The base is sleeved on the sleeve joint ring groove of the nut body through the side edge ring seat.

3. A translation mechanism according to claim 2, wherein, The side edge ring seat is provided with a side limiting groove; and the side limiting groove forms a limiting surface on the inner wall of the side edge ring seat.

4. A translation mechanism according to claim 3, wherein, The limiting surface is arranged in an inclined manner.

5. A translation mechanism according to claim 2, wherein, The base seat is provided with a base seat limiting groove on the side away from the nut.

6. A translation mechanism according to claim 5, wherein, The outer side of the nut body is provided with an anti-rotation boss or groove; and the base seat limiting groove corresponds to the anti-rotation boss or groove on the outer side of the nut body.

7. A translation mechanism according to claim 1, wherein, The horizontal projection of the base is one of a rectangle, a circle or a polygon.

8. A motion conversion structure, characterized by, The mechanism comprises a screw shaft, balls and the translation mechanism according to any one of claims 1-5; the balls are arranged in the region between the screw shaft and the translation mechanism. The motion conversion structure further comprises a return structure; and the return structure is arranged on the nut in the screw shaft or the translation mechanism.

9. A motion conversion structure according to claim 8, wherein The screw shaft comprises a shaft body; the shaft body is provided with an avoiding sink; the avoiding sink comprises a lower avoiding sink and an upper avoiding sink arranged on the shaft body; and the lower avoiding sink and the upper avoiding sink are distributed at the two ends of the shaft body.

10. A motion conversion structure according to any one of claims 8 or 9, wherein, The screw shaft and the base are provided with a limiting structure; the limiting structure comprises a base zero position boss arranged on the base and a screw limiting table arranged at the end of the screw shaft; and the outer side of the side close to the screw limiting table of the base zero position boss is an arc surface.

11. A brake caliper assembly comprising a brake caliper, a brake pad and an actuator, characterized in that, The brake caliper comprises a caliper body; and the caliper body is provided with at least one set of the motion conversion structure according to any one of claims 8-10. The motion conversion structure can convert the rotary motion into linear motion to make the brake pad move linearly; the actuator controls the rotation of the screw shaft; and the screw shaft can drive the translation mechanism to move linearly through the balls.

12. A brake caliper assembly according to claim 11, wherein, The upper avoiding sink of the screw shaft is provided with a position adjusting sink; the position adjusting sink comprises a calibration sink and an arc groove; the calibration sink extends from the upper avoiding sink to the side of the lower avoiding sink; and the arc groove extends from the calibration sink to the side of the lower avoiding sink. 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 cylinder hole is connected with the nut in the motion conversion structure through a limiting mechanism; the limiting mechanism comprises a boss or a groove arranged on the nut; and the inner wall of the cylinder hole is provided with a groove or a boss corresponding to the boss or the groove on the nut. The transmission shaft comprises a transmission shaft body; and the transmission shaft body is provided with a transmission end block; and the transmission end block is inserted into the upper avoiding sink.

13. A brake caliper assembly according to claim 12, wherein, The transmission end block comprises an end block body; 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 sink; and the adjusting piece is movably connected with the end block body and the screw shaft. The transmission end block comprises an end block body; 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 sink; and the adjusting piece is movably connected with the end block body and the screw shaft.

14. A brake caliper assembly according to claim 13, wherein, The adjusting member comprises an intermediate section and spherical surfaces arranged at both ends of the intermediate section; the end block body is also provided with a position adjusting groove; one end of the adjusting member is arranged in the position adjusting groove on the end block body, and the other end is arranged in the position adjusting groove of the screw shaft.

15. A brake caliper assembly according to claim 12, wherein, The pre-tightening mechanism is arranged between the transmission shaft and the screw shaft; the pre-tightening mechanism comprises a check ring; an annular embedding groove is arranged on the inner wall of the upper avoiding groove on the screw shaft, and the check ring is embedded in the annular embedding groove and overlapped on the transmission shaft.

16. A brake caliper assembly according to claim 15, wherein, The transmission end block is provided with an annular groove; the check ring is overlapped on the transmission end block.

17. A brake caliper assembly according to claim 15, wherein, 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 push spring; the check ring is overlapped on the transmission shaft through the elastic component.

18. A brake caliper assembly according to claim 17, wherein, The pre-tightening mechanism further comprises a gasket; the check ring is connected with the elastic component through the gasket.

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