Mechanical and electrical integrated calipers with return structure

Abstract

The mechanical and electrical integrated calipers with the return structure comprise a thrust screw rod, a thrust threaded sleeve, a piston and a brake pad, the thrust screw rod and the thrust threaded sleeve are installed in one end of the piston after being installed in the thrust threaded sleeve in a threaded fit mode, and the other end of the piston is connected with the brake pad. A mounting cavity used for mounting the thrust screw rod and the thrust thread sleeve is formed in one end of the piston, a locking piece is arranged in the mounting cavity, and the locking piece is matched with the inner wall of the mounting cavity to form force locking on the thrust thread sleeve and limit relative rotation of the thrust thread sleeve and the thrust screw rod. After braking of an automobile is finished, the piston can return, the brake pad is separated from the brake disc in time, dragging torque is reduced, energy consumption is saved, and noise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile brake, specifically relates to a mechatronic caliper with return structure. BACKGROUND

[0002] In the mechatronic caliper, the output of the motor is reduced by the speed reduction mechanism, and the thrust screw sleeve is driven to move axially by the helical rotation of the thrust screw, the axial movement of the thrust screw sleeve pushes out the piston, the piston pushed out pushes the brake pad to clamp the brake disc, and then the parking of the automobile is realized.

[0003] However, at present, when the brake is released, the brake pad still adheres to the brake disc, resulting in an increase in drag torque, noise, brake pad wear and reduced service life. UTILITY MODEL CONTENTS

[0004] The utility model discloses a mechatronic caliper with return structure can be provided after the automobile ends brake, so that the piston can return to position, let the brake pad can separate from the brake disc in time, reduce the drag torque, save energy consumption, reduce the generation of noise.

[0005] To solve the above technical problems, the utility model adopts the following scheme:

[0006] A mechatronic caliper with return structure, comprising a thrust screw, a thrust screw sleeve, a piston and a brake pad, the thrust screw is installed into the thrust screw sleeve through thread cooperation and is installed to the inside of one end of the piston, the other end of the piston is connected with the brake pad, the inside of one end of the piston is equipped with an installation cavity for installing the thrust screw and the thrust screw sleeve, a locking piece is arranged in the installation cavity, and the locking piece is matched with the inner wall of the installation cavity to form force locking on the thrust screw sleeve and limit the relative rotation of the thrust screw sleeve and the thrust screw.

[0007] In the scheme, the thrust screw is the main driving component of the caliper, rotates to generate thrust under the driving action of the motor, the thrust screw and the thrust screw sleeve are threadedly matched, the rotation of the thrust screw drives the axial movement of the thrust screw sleeve, and then the piston and the brake pad are pushed to be close to the brake disc, the brake pad clamps the brake disc to realize the brake effect.

[0008] The piston connects the thrust screw sleeve and the brake pad, converts the thrust transmitted by the thrust screw sleeve into the pressure of the brake pad, realizes the clamping of the brake disc, the brake pad contacts the brake disc, and generates the brake force through friction. The installation cavity is arranged in the inside of one end of the piston and is used for accommodating the thrust screw and the thrust screw sleeve and providing enough space for the work of the locking piece.

[0009] The locking piece is installed in the installation cavity and cooperates with the inner wall of the installation cavity to form force locking to the thrust nut, the locking mode not only ensures the integrity of the thrust nut and the piston, but also limits the relative rotation between the thrust nut and the piston, so that the thrust nut and the piston are combined into a whole and move together, when the brake is released, the thrust screw reverses, the thrust nut has a reverse axial movement tendency, and the thrust nut and the piston constitute integral movement under the action of force locking, and then the thrust nut drives the piston to move axially away from the brake disc, so that the brake pad is separated from the brake disc, and the piston is reset, so that the piston can be reset after the automobile ends braking, the brake pad cannot be attached to the brake disc, the drag torque is reduced, the energy required for vehicle driving is smaller, energy is saved, noise is not easy to produce, the wear degree of the brake pad is reduced, and the service life is prolonged.

[0010] Optionally, an annular groove matched with the locking piece is arranged on the inner wall of the installation cavity, and the locking piece is installed in the annular groove.

[0011] Optionally, the locking piece is a clasp spring, the inner side of the clasp spring is attached to the side wall of the thrust nut, and the friction force between the clasp spring, the inner wall of the installation cavity and the thrust nut forms force locking to the thrust nut.

[0012] Optionally, the inner end side wall of the installation cavity is a conical surface, and one end of the thrust nut, which faces the brake pad, is matched with the conical surface.

[0013] Optionally, the piston further comprises a movable cavity for the front end of the thrust screw to move, and the movable cavity is located between the installation cavity and the brake pad.

[0014] Optionally, the diameter of the movable cavity is greater than the outer diameter of the thrust screw.

[0015] Optionally, the piston is made of stainless steel.

[0016] Optionally, the thrust nut constitutes a whole structure with the piston in the state that the locking piece and the side wall of the installation cavity cooperate to form force locking.

[0017] The utility model discloses have the beneficial effect:

[0018] 1. In the utility model, when releasing the brake, the thrust screw reverses, the thrust nut has a reverse axial movement tendency, and the thrust nut and the piston constitute integral movement under the action of force locking, and then the thrust nut drives the piston to move axially away from the brake disc, so that the brake pad is separated from the brake disc, and the piston is reset, so that the piston can be reset after the automobile ends braking, the brake pad cannot be attached to the brake disc, the drag torque is reduced, the energy required for vehicle driving is smaller, energy is saved, noise is not easy to produce, the wear degree of the brake pad is reduced, and the service life is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the piston.

[0021] Figure numerals: 1-caliper, 2-piston, 3-thrust screw, 4-thrust screw sleeve, 5-locking piece, 6-movable chamber, 7-conical surface, 8-installation chamber, 9-annular groove, 10-brake pad, 11-brake disc. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0025] Example

[0026] A mechatronic caliper with a return structure includes a thrust screw 3, a thrust screw sleeve 4, a piston 2 and a brake pad 10. The thrust screw 3 is installed into the thrust screw sleeve 4 through threaded engagement and then installed inside one end of the piston 2. The other end of the piston 2 is connected to the brake pad 10. An installation cavity 8 for installing the thrust screw 3 and the thrust screw sleeve 4 is provided inside one end of the piston 2. A locking piece 5 is provided in the installation cavity 8. The locking piece 5 cooperates with the inner wall of the installation cavity 8 to force lock the thrust screw sleeve 4 and limit the relative rotation of the thrust screw sleeve 4 and the thrust screw 3.

[0027] In this embodiment, as shown in Figure 1 and Figure 2 , the thrust screw 3 is the main driving component of the caliper 1, which rotates to generate thrust under the driving action of the motor, the thrust screw 3 is in threaded cooperation with the thrust nut 4, the rotation of the thrust screw 3 drives the axial movement of the thrust nut 4, and in turn pushes the piston 2 and the brake pad 10 to approach the brake disc 11, the brake pad 10 clamps the brake disc 11 to achieve the braking effect. The piston 2 connects the thrust nut 4 and the brake pad 10, converts the thrust transmitted by the thrust nut 4 into the pressure of the brake pad 10, realizes the clamping of the brake disc 11, and the brake pad 10 contacts the brake disc 11 to generate braking force through friction. The installation cavity 8 is arranged inside one end of the piston 2, which is used to accommodate the thrust screw 3 and the thrust nut 4, and provides enough space for the locking piece 5 to work.

[0028] The locking piece 5 is installed in the installation cavity 8 and cooperates with the inner wall of the installation cavity 8 to form force locking for the thrust nut 4. This locking mode not only ensures the integrity of the thrust nut 4 and the piston 2, but also limits the relative rotation between the thrust nut 4 and the piston 2. In this way, the thrust nut 4 and the piston 2 are combined into a whole and move together. When the brake is released, the thrust screw 3 is reversed, the thrust nut 4 has a tendency to move axially in the opposite direction, and the thrust nut 4 and the piston 2 move as a whole under the action of force locking, and then the thrust nut 4 drives the piston 2 to move axially away from the brake disc 11, so that the brake pad 10 is separated from the brake disc 11, and the piston 2 is reset. In this way, after the car ends braking, the brake pad 10 will not be attached to the brake disc 11, the drag torque is reduced, the energy required for vehicle travel is reduced, energy is saved, noise is not easy to produce, the wear degree of the brake pad 10 is reduced, and the service life is prolonged.

[0029] Further, an annular groove 9 adapted to the locking piece 5 is arranged on the inner wall of the installation cavity 8, and the locking piece 5 is installed in the annular groove 9. The locking piece 5 cooperates with the inner wall of the installation cavity 8 to form force locking for the thrust nut 4.

[0030] Further, the locking piece 5 is a snap spring, the inner side of the snap spring is attached to the side wall of the thrust nut 4, and the friction between the snap spring, the inner wall of the installation cavity 8 and the thrust nut 4 forms force locking for the thrust nut 4.

[0031] Specifically, an annular groove 9 is arranged on the inner wall of the installation cavity 8, which is matched with the locking piece 5. The annular groove 9 provides a precise installation position for the locking piece 5, ensuring that the locking piece 5 can be stably fixed in the installation cavity 8 and form an effective force locking with the thrust nut 4. The locking piece 5 adopts the form of a circlip, which is an annular part with elasticity. When the circlip is installed in the annular groove 9, the elastic force of the circlip tightly holds the thrust nut 4 on the inner side, thereby forming a stable locking structure. The friction force between the circlip, the inner wall of the installation cavity 8 and the thrust nut 4 constitutes a force locking mechanism. The elastic force of the circlip generates sufficient friction force between the circlip and the thrust nut 4, which is sufficient to resist the relative rotation between the thrust nut 4 and the thrust screw 3 when the thrust screw 3 rotates.

[0032] Further, the inner end side wall of the installation cavity 8 is a tapered surface 7, and one end of the thrust nut 4 towards the brake pad 10 is matched with the tapered surface 7.

[0033] Specifically, the design of the tapered surface 7 makes it easier for the thrust nut 4 to find the correct position during installation, playing a guiding role. When the thrust nut 4 is pushed into the installation cavity 8, the tapered surface 7 gradually guides the thrust nut 4 to the correct installation depth, ensuring the correct fit between the thrust nut 4 and the piston 2 and other components. The matching of the tapered surface 7 and the thrust nut 4 increases the contact area between them. When the locking piece 5 (such as a circlip) is installed in the annular groove 9 and tightly holds the thrust nut 4, the design of the tapered surface 7 enables the locking force to be more effectively transmitted to the thrust nut 4, thereby enhancing the locking effect. Since there may be certain tolerances in the manufacturing process, the design of the tapered surface 7 can compensate for these tolerances to some extent, ensuring the close fit between the thrust nut 4 and the installation cavity 8.

[0034] Further, the piston 2 is further provided with a movable cavity 6 for the front end of the thrust screw 3 to move, and the movable cavity 6 is located between the installation cavity 8 and the brake pad 10. The movable cavity 6 is connected with the installation cavity 8, which facilitates the passage of the thrust screw 3.

[0035] Further, the diameter of the movable cavity 6 is greater than the outer diameter of the thrust screw 3.

[0036] Further, the piston 2 is made of stainless steel.

[0037] Further, the thrust nut 4 forms an integral structure with the piston 2 in the state that the locking piece 5 is matched with the side wall of the installation cavity 8 to form a force locking.

[0038] Specifically, the thrust nut 4 is compressed under the cooperation of the locking member 5 and the conical surface 7 of the mounting cavity 8, force locking is realized on the thrust screw 3, the thrust nut 4 and the piston 2 form an integral whole, when the automobile is released from braking, the piston 2 can be reset only when the thrust screw 3 is reversed, and then the brake pad 10 is separated from the brake disc 11.

[0039] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. According to the technical essence of the present application, any simple modification, equivalent replacement and improvement of the above embodiment, etc. still belong to the protection scope of the technical scheme of the present application within the spirit and principles of the present application.

Claims

1. A mechatronic caliper with a return structure, comprising a thrust screw (3), a thrust screw sleeve (4), a piston (2) and a brake pad (10), wherein the thrust screw (3) is threadably fitted into the thrust screw sleeve (4) and then installed inside one end of the piston (2), and the other end of the piston (2) is connected to the brake pad (10), characterized in that: An installation cavity (8) for installing the thrust screw (3) and the thrust screw sleeve (4) is provided inside one end of the piston (2). A locking member (5) is provided in the installation cavity (8). The locking member (5) cooperates with the inner wall of the installation cavity (8) to force-lock the thrust screw sleeve (4) and limit the relative rotation of the thrust screw sleeve (4) and the thrust screw (3).

2. The mechatronic caliper with a return structure according to claim 1, characterized in that: An annular groove (9) adapted to the locking member (5) is provided on the inner wall of the installation cavity (8), and the locking member (5) is installed in the annular groove (9). The locking member (5) cooperates with the inner wall of the installation cavity (8) to form a force lock on the thrust screw sleeve (4).

3. The mechatronic caliper with a return structure according to claim 2, characterized in that: The locking member (5) is a retaining spring, the inner side of which is in contact with the side wall of the thrust screw sleeve (4), and the friction between the retaining spring, the inner wall of the mounting cavity (8) and the thrust screw sleeve (4) forms a force lock on the thrust screw sleeve (4).

4. The mechatronic caliper with a return structure according to claim 3, characterized in that: The inner end side wall of the installation cavity (8) is a conical surface (7), and the end of the thrust screw sleeve (4) facing the brake pad (10) is adapted to the conical surface (7).

5. The mechatronic caliper with a return structure according to claim 1, characterized in that: A movable chamber (6) for the front end of the thrust screw (3) to move is further provided in the piston (2), and the movable chamber (6) is located between the mounting chamber (8) and the brake pad (10).

6. The mechatronic caliper with a return structure according to claim 5, characterized in that: The diameter of the movable cavity (6) is larger than the outer diameter of the thrust screw (3).

7. The mechatronic caliper with a return structure according to claim 1, characterized in that: The piston (2) is made of stainless steel.

8. The mechatronic caliper with a return structure according to claim 1, characterized in that: The thrust screw sleeve (4) forms an integral structure with the piston (2) when the locking member (5) cooperates with the side wall of the mounting cavity (8) to form a force-locked state.

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