Hydraulic brake unit, brake assembly and vehicle

Abstract

The invention relates to a hydraulic brake unit, a brake assembly and a vehicle, the hydraulic brake unit comprises a shell, a brake cylinder piston and a detection assembly, and a signal generator is arranged on the side wall of the brake cylinder piston; according to the hydraulic brake unit, the signal generator is located on the side wall of the brake cylinder piston, the design of an additional connecting structure between the signal generator and the shell can be omitted, the matching error can be reduced, displacement between the brake cylinder piston and the signal generator can be limited, shaking of the signal generator is avoided, and the service life of the hydraulic brake unit is prolonged. Therefore, the uniformity of signals transmitted by the signal generator for multiple times in the reciprocating motion process of the brake cylinder piston is ensured, and the detection precision of the detection assembly is improved. In addition, the signal generator is contained in the brake cylinder piston, so that the spatial layout of the hydraulic brake unit is facilitated.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a hydraulic brake unit, a brake assembly and a vehicle. Background Art

[0002] With the development of automobile electrification and intelligence, more and more automobiles are using wire-controlled brake systems. In hydraulic wire-controlled brake systems, displacement sensors are usually used to collect the displacement signal of the piston in the master cylinder, so as to control the rotation of the brake motor according to the displacement signal of the piston to provide braking force to the brake.

[0003] In the existing technical solutions, an additional connecting piece, such as an L-shaped bracket, is generally provided at the end of the piston rod, and the other end of the bracket is extended into the cylinder body. The displacement generator in the displacement sensor is fixed on the bracket and moves with the sliding of the piston in the cylinder body, and the displacement receiver is fixed on the cylinder body to receive the signal. However, due to the matching clearance between the bracket and the cylinder body and the piston, and the long support arm of the bracket, the bracket is prone to shaking during the movement with the piston, resulting in unreliable signals received by the displacement receiver, large errors, and reduced detection accuracy of the displacement sensor. Summary of the invention

[0004] The embodiments of the present application provide a hydraulic brake unit, a brake assembly and a vehicle to improve the detection accuracy of the displacement sensor, while also optimizing the spatial layout of the brake master cylinder to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a hydraulic brake unit is provided, the hydraulic brake unit comprising:

[0006] A housing provided with a cylinder hole;

[0007] a brake cylinder piston, at least a portion of which is movable within the cylinder bore; and

[0008] A detection component, including a signal generator and a signal detector;

[0009] The signal generator is fixedly arranged on the side wall of the brake cylinder piston, and the signal detector is located on one side of the brake cylinder piston and cooperates with the signal generator to obtain the position information of the brake cylinder piston.

[0010] In some embodiments, the hydraulic brake unit further comprises:

[0011] A connecting piece, fixedly connected to the brake cylinder piston;

[0012] The signal generator is fixedly arranged on the side wall of the brake cylinder piston through a connecting piece.

[0013] In some embodiments, the signal generator and the connector are integrally formed.

[0014] In some embodiments, the connector and the signal generator are an integral casting.

[0015] In some embodiments, at least a portion of the signal generator is located within the connector.

[0016] In some embodiments, the connector includes:

[0017] A connecting portion, fixedly connected to the brake cylinder piston; and

[0018] A mounting portion, arranged on a side of the connecting portion away from the brake cylinder piston and connected to the connecting portion;

[0019] The mounting portion has a mounting groove, or the mounting portion and the connecting portion form a mounting groove, and at least a portion of the signal generator is limited in the mounting groove.

[0020] In some embodiments, the signal generator is disposed around the connecting portion.

[0021] In some embodiments, the mounting portion includes a first sub-portion and a second sub-portion, the first sub-portion and the second sub-portion are spaced apart in the first direction and are both connected to the connecting portion;

[0022] The mounting groove is formed between the first sub-section and the second sub-section, and the signal generator is connected to the first sub-section and / or the second sub-section.

[0023] In some embodiments, the signal generator is further connected to the connection portion.

[0024] In some embodiments, the orthographic projection of the signal generator in the first direction completely falls on the first sub-portion and / or the second sub-portion.

[0025] In some embodiments, the brake cylinder piston has a first position and a second position;

[0026] When the brake cylinder piston moves between the first position and the second position, at least a portion of the signal generator faces the signal detector.

[0027] In some embodiments, the signal generator is a magnetic member; and

[0028] The signal detector is used to detect the magnetic signal of the signal generator to obtain the position information of the brake cylinder piston.

[0029] In some embodiments, at least a portion of the brake cylinder piston is located outside the cylinder bore;

[0030] The signal generator is connected to the part of the brake cylinder piston located outside the cylinder hole.

[0031] In some embodiments, it also includes:

[0032] A cover body is connected to the housing, the cover body has a first cavity, the first cavity is communicated with the cylinder hole, and at least a part of the brake cylinder piston is located in the first cavity;

[0033] Wherein, the signal generator is located in the first cavity.

[0034] In some embodiments, the signal detector is connected to the cover.

[0035] In some embodiments, the cover further has a second cavity, and at least a portion of the signal detector is located in the second cavity.

[0036] In some embodiments, the cover and the signal detector are integrally formed.

[0037] In some embodiments, the hydraulic brake unit includes a connecting piece for mounting the signal generator, the connecting piece being connected to the brake cylinder piston;

[0038] The cover includes:

[0039] The abutment portion, at least a portion of which is arranged opposite to the brake cylinder piston and / or the connecting member in a first direction, so as to limit the movable stroke of the brake cylinder piston.

[0040] In some embodiments, an opening is provided on the abutting portion, the opening is communicated with the first cavity, and the brake cylinder piston and / or the connecting member are arranged opposite to the opening in the first direction;

[0041] Therein, in the first direction, at least part of the orthographic projection of the connecting portion and / or the brake cylinder piston falls on the side wall of the abutment portion.

[0042] In some embodiments, the hydraulic brake unit further comprises:

[0043] The input part, at least part of which extends from the opening into the first cavity and is linked with the brake cylinder piston to drive the brake cylinder piston to move in the cylinder hole.

[0044] In some embodiments, the signal detector is located at one side of the signal generator in the second direction and extends along the first direction.

[0045] In some embodiments, the connecting piece is sleeved on the brake cylinder piston.

[0046] According to a third aspect of the present application, a brake assembly is provided, the brake assembly comprising a hydraulic brake unit.

[0047] According to a fourth aspect of the present application, a vehicle is provided, comprising a braking system.

[0048] The hydraulic brake unit proposed in the embodiment of the present application includes a housing, a brake cylinder piston and a detection assembly, wherein the housing is provided with a cylinder hole; at least a portion of the brake cylinder piston can move in the cylinder hole; the detection assembly includes a signal generator and a signal detector; wherein the signal generator is fixedly arranged on the side wall of the brake cylinder piston, and the signal detector is located on one side of the brake cylinder piston and cooperates with the signal generator to obtain the position information of the brake cylinder piston; compared with the related art that uses connecting rods, brackets and other structures to fix the piston and the sensing element, the signal generator in the hydraulic brake unit proposed in the embodiment of the present application is located on the side wall of the brake cylinder piston, which can omit the design of the additional connection structure between the signal generator and the housing, can reduce the matching error, and is conducive to limiting the displacement between the brake cylinder piston and the signal generator, avoiding the shaking of the signal generator, thereby ensuring the uniformity of the signal generator's multiple emission signals during the reciprocating motion of the brake cylinder piston, and improving the detection accuracy of the detection assembly. In addition, accommodating the signal generator in the brake cylinder piston is also conducive to the spatial layout of the hydraulic brake unit in the present application.

[0049] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0051] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0052] Figure 1 is a schematic diagram of the main structure of a hydraulic brake unit provided in an exemplary embodiment of the present application;

[0053] Figure 2 is a schematic structural diagram of a hydraulic brake unit provided in an exemplary embodiment of the present application;

[0054] Figure 3 is a schematic cross-sectional structural diagram of a hydraulic brake unit provided in an exemplary embodiment of the present application;

[0055] Figure 4 is a partial structural schematic diagram of a hydraulic brake unit provided in an exemplary embodiment of the present application;

[0056] Figure 5 is a partial structural schematic diagram of a hydraulic brake unit provided in an exemplary embodiment of the present application;

[0057] Figure 6 is a partial structural schematic diagram of a hydraulic brake unit provided in an exemplary embodiment of the present application;

[0058] Figure 7 is a schematic structural diagram of a connector provided in an exemplary embodiment of the present application;

[0059] Figure 8 It is a schematic cross-sectional structural diagram of a connector provided in an exemplary embodiment of the present application.

[0060] Description of reference numerals:

[0061] 1. Housing; 2. Cylinder hole; 3. Brake cylinder piston; 31. First subsection; 32. Second subsection; 4. Detection assembly; 41. Signal generator; 42. Signal detector; 421. Detection body; 422. Connector; 5. Connector; 51. Connecting part; 52. Mounting part; 521. First subsection; 522. Second subsection; 6. Mounting groove; 7. Cover; 71. Abutment part; 8. First cavity; 9. Second cavity; 10. Opening; 11. Input part. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0063] The present application proposes a hydraulic brake unit. Figures 1 to 8 These are some embodiments of the present application.

[0064] See also Figures 1 to 3 In some embodiments of the present application, the hydraulic brake unit includes a housing 1 and a brake cylinder piston 3, the housing 1 is provided with a cylinder hole 2; at least a portion of the brake cylinder piston 3 can move in the cylinder hole 2; in this embodiment, when the driver steps on the brake pedal, the brake pedal will transmit force to the brake cylinder piston 3 and drive the brake cylinder piston 3 to move in the cylinder hole 2.

[0065] The housing 1 may be an independent master cylinder structure or a master cylinder structure integrated in a hydraulic block; there is no limitation here.

[0066] In some embodiments of the present application, the detection component 4 includes a signal generator 41 and a signal detector 42; the signal generator 41 is fixedly arranged on the side wall of the brake cylinder piston 3, and the signal detector 42 is located on one side of the brake cylinder piston 3 and cooperates with the signal generator 41 to obtain the position information of the brake cylinder piston 3; in this embodiment, the signal generator 41 can move with the brake cylinder piston 3, and the signal detector 42 cooperates with the signal generator 41, so as to obtain the position information of the brake cylinder piston 3, and then obtain the displacement information of the brake cylinder piston 3.

[0067] In the hydraulic brake unit in the embodiment of the present application, when the driver steps on the brake pedal, the brake pedal will transmit force to the piston and drive the piston to move. The signal generator 41 and the signal detector 42 cooperate to detect the displacement information of the piston, so that the brake motor can be controlled to rotate according to the displacement information of the piston to provide braking force to the brake.

[0068] In the technical solution of the present application, the signal generator 41 is fixedly assembled on the side wall of the brake cylinder piston 3; compared with the related art that uses connecting rods, brackets and other structures to fix the piston and the sensing element, the signal generator 41 in the hydraulic brake unit proposed in the embodiment of the present application is located on the side wall of the brake cylinder piston 3, which can omit the design of the additional connection structure between the signal generator 41 and the housing 1, can reduce the matching error, and is conducive to limiting the displacement between the brake cylinder piston 3 and the signal generator 41, avoiding the shaking of the signal generator 41, thereby ensuring the uniformity of the signal generator 41 transmitting multiple signals during the reciprocating motion of the brake cylinder piston 3, and improving the detection accuracy of the detection component 4. In addition, accommodating the signal generator 41 in the brake cylinder piston 3 is also conducive to the spatial layout of the hydraulic brake unit in the present application.

[0069] Therefore, the reliability of the assembly between the signal generator 41 and the brake cylinder piston 3 can be improved and the risk of the signal generator 41 falling off can be reduced.

[0070] It can be understood that since the signal generator 41 is not easy to fall off the brake cylinder piston 3, it can also avoid the signal generator 41 being able to move relative to the brake cylinder piston 3, thereby improving the synchronization between the displacement synchronization signal of the hydraulic brake unit and the braking depth of the brake system.

[0071] It should be noted that when the signal detector 42 in the embodiment of the present application is fixed on the brake cylinder piston 3, the distance between the signal detector 42 and the brake cylinder piston 3 is closer than the distance between the sensing element and the piston in the related technology. Therefore, the assembly reliability between the signal generator 41 and the brake cylinder piston 3 is better.

[0072] In some embodiments of the present application, the hydraulic brake unit also includes a connecting member 5, which is fixedly connected to the brake cylinder piston 3; wherein the signal generator 41 is fixedly arranged on the side wall of the brake cylinder piston 3 through the connecting member 5; in this embodiment, the form of mutual fixation between the signal generator 41 and the connecting member 5, and the form of mutual fixation between the connecting member 5 and the brake cylinder piston 3 are not limited, and can be screwed, welded, or integrally formed, etc.

[0073] In some embodiments of the present application, the signal generator 41 and the connecting member 5 are integrally formed, so the signal generator 41 and the connecting member 5 will not separate during use, and the connecting member 5 is fixedly connected to the brake cylinder piston 3, so the signal generator 41 is not easy to fall off the brake cylinder piston 3.

[0074] When the signal generator 41 and the connecting member 5 are integrally formed, the signal generator 41 may be embedded in the connecting member 5, or at least part of the generator and the connecting member 5 may be fused together; this is not limited here.

[0075] In some embodiments of the present application, the connector 5 and the signal generator 41 are an integral casting; that is, the connector 5 and the signal generator 41 are integrally cast to ensure the reliability between the connector 5 and the signal generator 41, thereby preventing the signal generator 41 from loosening on the connector 5.

[0076] See also Figures 4 to 6 In some embodiments of the present application, at least a portion of the signal generator 41 is located inside the connector 5; such a configuration enables the contact area between the signal generator 41 and the connector 5 to be larger after the signal generator 41 and the connector 5 are integrally formed, and the larger the contact area between the signal generator 41 and the connector 5, the more secure the fixation between the signal generator 41 and the connector 5.

[0077] In some embodiments of the present application, the connecting member 5 includes a connecting portion 51 and a mounting portion 52, the connecting portion 51 is fixedly connected to the brake cylinder piston 3; the mounting portion 52 is arranged on the side of the connecting portion 51 away from the brake cylinder piston 3 and is connected to the connecting portion 51; wherein, the mounting portion 52 has a mounting groove 6, or the mounting portion 52 and the connecting portion 51 form a mounting groove 6, and at least part of the signal generator 41 is limited in the mounting groove 6; that is, in this embodiment, by forming the mounting groove 6 on the connecting member 5 and making at least part of the signal generator 41 limited in the mounting groove 6, the contact area between the signal generator 41 and the connecting member 5 is increased, thereby improving the fixing firmness between the signal generator 41 and the connecting member 5.

[0078] It is understandable that the mounting groove 6 formed on the mounting portion 52 can be formed independently of the mounting portion 52 , or can be formed by the mounting portion 52 and the connecting portion 51 ; there is no limitation here.

[0079] See also Figure 4 In some embodiments of the present application, the mounting slot 6 is open in the second direction Y, and the entire signal generator 41 is located in the mounting slot 6 .

[0080] See also Figure 5 In some embodiments of the present application, the mounting groove 6 is open in the second direction Y, and part of the signal generator 41 is located in the mounting groove 6 .

[0081] See also Figure 6 In some embodiments of the present application, the mounting slot 6 is open in both the first direction X and the second direction Y, and the entire signal generator 41 is located in the mounting slot 6 .

[0082] Of course, the opening form of the mounting groove 6 on the connecting member 5 and the assembly method between the signal generator 41 and the mounting groove 6 are not limited to the following. Figures 4 to 6 Among them, the technical solutions of providing a mounting groove 6 on the connecting member 5 and limiting at least a portion of the signal generator 41 in the mounting groove 6 should be within the protection scope of the present application.

[0083] In addition, since the mounting portion 52 is located on the side of the connecting portion 51 away from the brake cylinder piston 3 and a mounting groove 6 is provided on the mounting portion 52, such a configuration allows at least a portion of the signal generator 41 to be exposed from the connecting member 5, thereby reducing the number of components blocked between the signal generator 41 and the signal generator 41, thereby ensuring the accuracy of the displacement detection of the brake cylinder piston 3.

[0084] In some embodiments of the present application, the signal generator 41 is arranged around the connecting portion 51; that is, when the connecting member 5 moves along the first direction X, if the connecting member 5 rotates, at least part of the signal generator 41 can always face the signal detector 42 to ensure the accuracy of the displacement detection of the brake cylinder piston 3.

[0085] In some embodiments of the present application, the mounting portion 52 includes a first sub-portion 521 and a second sub-portion 522, and the first sub-portion 521 and the second sub-portion 522 are spaced apart in the first direction X, and a mounting groove 6 is formed between the first sub-portion 521 and the second sub-portion 522, and the signal generator 41 is connected to the first sub-portion 521 and / or the second sub-portion 522; such a configuration enables the first sub-portion 521 and the second sub-portion 522 to protect the signal generator 41 in the first direction X, so that the signal generator 41 will not be directly affected by external forces in the first direction X, thereby reducing the risk of failure of the signal generator 41 during use.

[0086] In some embodiments of the present application, the connecting member 5 moves along with the brake cylinder piston 3 along the first direction X, that is, the first sub-portion 521 and the second sub-portion 522 can protect the signal generator 41 in the moving direction of the connecting member 5 to prevent the signal generator 41 from being damaged due to collision and other problems.

[0087] There is no limitation on the connection method between the signal generator 41 and the mounting portion 52 in the mounting groove 6 .

[0088] In an embodiment of the present application, the signal generator 41 is connected to the first sub-section 521 .

[0089] In another embodiment of the present application, the signal generator 41 is connected to the second sub-section 522 .

[0090] In another embodiment of the present application, the signal generator 41 is connected to both the first sub-section 521 and the second sub-section 522 .

[0091] In some embodiments of the present application, the signal generator 41 is integrally formed with the first sub-portion 521 and the second sub-portion 522 , that is, after the signal generator 41 and the connector 5 are integrally formed, the signal generator 41 and the connector 5 have multiple contact surfaces, thereby ensuring the reliability of fixing the signal generator 41 on the connector 5 .

[0092] It can be understood that the first sub-portion 521 and the second sub-portion 522 have a certain thickness in the first direction X, so as to be able to withstand a certain impact force to protect the signal generator 41 .

[0093] In some embodiments of the present application, the signal generator 41 is also connected to the connecting portion 51; in this embodiment, the first sub-portion 521, the second sub-portion 522 and the connecting portion 51 enclose a mounting groove 6, and the signal generator 41 is connected to the connecting portion 51 to further improve the reliability of fixing the signal generator 41 on the connecting member 5.

[0094] In some embodiments of the present application, the signal generator 41 is also integrally formed with the connecting portion 51; with this arrangement, after the signal generator 41 is connected to the connecting member 5, the contact surface between the signal generator 41 and the connecting member 5 is further increased, thereby ensuring the reliability of the signal generator 41 being fixed on the connecting member 5.

[0095] In some embodiments of the present application, the first sub-portion 521 , the second sub-portion 522 and the connecting portion 51 are integrally formed, so that the connecting member 5 is an independent structure, that is, the strength of the connecting member 5 is higher.

[0096] Since the signal generator 41 is integrally formed with the first sub-portion 521 , the second sub-portion 522 and the connecting portion 51 , the signal generator 41 and the connecting member 5 have multiple contact surfaces, thereby ensuring the reliability of fixing the signal generator 41 on the connecting member 5 .

[0097] In some embodiments of the present application, the orthographic projection of the signal generator 41 in the first direction X completely falls on the first sub-portion 521 and / or the second sub-portion 522. In this way, the structure of the signal generator 41 does not protrude from the connector 5, so as to improve the protective effect of the connector 5 on the signal generator 41 and prevent the signal generator 41 from being damaged during use.

[0098] In some embodiments of the present application, the surface of the signal generator 41 exposed from the connecting member 5 is flush with the outer surface of the connecting member 5, so that the connecting member 5 not only protects the signal generator 41, but also shortens the distance between the signal generator 41 and the signal detector 42 to ensure the accuracy of the displacement detection of the brake cylinder piston 3.

[0099] In some embodiments of the present application, the connecting member 5 has a first position and a second position; wherein, when the connecting member 5 switches between the first position and the second position, at least a portion of the signal generator 41 faces the signal detector 42; it is configured in this way so that when the connecting member 5 moves, at least a portion of the signal generator 41 always faces the signal detector 42, thereby ensuring the accuracy of the hydraulic brake unit's detection of the displacement of the brake cylinder piston 3.

[0100] See also Figures 7 and 8 In some embodiments of the present application, the connecting member 5 is arranged in a ring shape, and the signal generator 41 is arranged on the outer circumferential surface of the connecting member 5 arranged in a ring shape.

[0101] The signal generator 41 is also arranged in a ring shape, so as to ensure that when the connecting member 5 moves along the first direction X, at least a portion of the signal generator 41 is always facing the signal detector 42 .

[0102] In some embodiments of the present application, when the connecting member 5 is in the first position, the pedal is in the initial position and is not stepped on; when the connecting member 5 is in the second position, the pedal is in the extreme position and can no longer be stepped on by the driver.

[0103] In some embodiments of the present application, the signal generator 41 is a magnetic component; the signal detector 42 is used to detect the magnetic signal of the signal generator 41 to obtain the position information of the brake cylinder piston; wherein, since the signal generator 41 is a magnetic component, the signal generator 41 can always emit a magnetic signal during use, and the magnetic signal is generated due to the characteristics of the signal generator 41 itself, so the magnetic signal emitted by the signal generator 41 is not easy to fail, and the magnetic signal emitted by the signal generator 41 will be received and processed by the signal detector 42 to convert the magnetic signal into an electrical signal, thereby determining the size of the braking force that the braking system needs to provide when the driver steps on the pedal.

[0104] The magnetic signal includes magnetic field strength and changes in magnetic field strength.

[0105] In some embodiments of the present application, the signal detector 42 includes a Hall sensor.

[0106] In some embodiments of the present application, at least part of the brake cylinder piston 3 is located outside the cylinder hole 2; wherein, the signal generator 41 is connected to the part of the brake cylinder piston 3 located outside the cylinder hole 2; such arrangement is to avoid the setting of the signal generator 41 interfering with the movement of the brake cylinder piston 3 in the first direction X.

[0107] It should be noted that when the signal generator 41 is connected to the part of the brake cylinder piston 3 located outside the cylinder hole 2, the specific position of the signal generator 41 on the brake cylinder piston 3 is not restricted; it is sufficient to ensure that when the brake cylinder piston 3 moves in the first direction X, the signal generator 41 does not abut and interfere with the housing 1.

[0108] In addition, the signal generator 41 is arranged outside the cylinder hole 2 , which can also ensure the sealing between the brake cylinder piston 3 and the housing 1 and prevent the oil inside the housing 1 from leaking out.

[0109] In some embodiments of the present application, the signal generator 41 is located at an end of the brake cylinder piston 3 away from the housing 1; this configuration is to avoid interference of the signal generator 41 with the movement of the brake cylinder piston 3 in the first direction X.

[0110] In some embodiments of the present application, the hydraulic brake unit also includes a cover body 7, which is connected to the shell 1, and the cover body 7 has a first cavity 8, and at least a portion of the brake cylinder piston 3 is located in the first cavity 8; wherein the signal generator 41 is located in the first cavity 8; that is, in this embodiment, the cover body 7 can provide protection for the portion of the brake cylinder piston 3 located outside the shell 1 and the signal generator 41. At the same time, since the signal generator 41 is directly arranged in the first cavity 8, there is no need to open a separate hole on the cover body 7 for the installation of the signal generator 41, nor is there a need to arrange structures such as connecting rods or brackets in the hydraulic brake unit, thereby optimizing the assembly space in the hydraulic brake unit and reducing the number of components in the hydraulic brake unit.

[0111] In some embodiments of the present application, the signal detector 42 is connected to the cover body 7; this arrangement is because the signal generator 41 is located in the first cavity 8 of the cover body 7. Connecting the signal detector 42 to the cover body 7 can shorten the distance between the signal detector 42 and the signal generator 41, thereby improving the stability and accuracy of the signal detector 42 and the signal generator 41 in detecting the displacement of the brake cylinder piston 3.

[0112] In some embodiments of the present application, the cover body 7 also has a second cavity 9, and at least part of the signal detector 42 is located in the second cavity 9; this configuration is used to further shorten the distance between the signal detector 42 and the signal generator 41, thereby improving the stability and accuracy of the signal detector 42 and the signal generator 41 in detecting the displacement of the brake cylinder piston 3.

[0113] In some embodiments of the present application, the signal detector 42 includes a detection body 421 located in the second cavity 9 and a connector 422 located outside the second cavity 9. The detection body 421 cooperates with the signal generator 41 to detect the displacement information of the brake cylinder piston 3. The connector 422 is connected to the wiring harness in the vehicle to connect to the controller in the vehicle.

[0114] In some embodiments of the present application, the second cavity 9 extends along the first direction X, the detection body 421 extends along the first direction X, and the size of the second cavity 9 in the first direction X is larger than the size of the detection body 421 in the first direction X, so that the second cavity 9 can provide a certain assembly margin for the signal detector 42.

[0115] At the same time, if the signal detector 42 fits tightly against the wall of the second cavity 9, the partial space of the second cavity 9 that is longer than the detection body 421 in the first direction X can avoid the signal detector 42 being difficult to install in the cover 7 due to excessive pressure inside the second cavity 9.

[0116] It can be understood that, compared with disposing the signal detector 42 on the surface of the cover 7 , when disposing the signal detector 42 in the second cavity 9 , the distance between the signal detector 42 and the signal generator 41 is closer.

[0117] In some embodiments of the present application, the signal detector 42 passes through a through hole of the housing 1 and is then assembled into the second cavity 9 .

[0118] In some embodiments of the present application, the cover body 7 and the signal detector 42 are integrally formed; such a configuration enables the signal detector 42 to be assembled on the cover body 7, that is, the distance between the signal detector 42 and the signal generator 41 is shortened, thereby improving the stability and accuracy of the signal detector 42 and the signal generator 41 in detecting the displacement of the brake cylinder piston 3.

[0119] In some embodiments of the present application, the hydraulic brake unit includes a connecting member 5 for installing a signal generator 41, and the connecting member 5 is connected to the brake cylinder piston 3; the cover body 7 includes an abutment portion 71, and at least a portion of the abutment portion 71 is arranged relative to the brake cylinder piston 3 and / or the connecting member 5 in the first direction X to limit the moving stroke of the brake cylinder piston 3, that is, when the brake cylinder piston 3 moves in the first direction X along a direction away from the housing 1, after the brake cylinder piston 3 moves a certain stroke, the connecting member 5 and at least one of the brake cylinder piston 3 will abut against the abutment portion 71 to limit the moving stroke of the brake cylinder piston 3.

[0120] In some embodiments of the present application, an opening 10 is provided on the abutting portion 71, the opening 10 is connected to the first cavity 8, and the brake cylinder piston 3 and / or the connecting member 5 are arranged relative to the opening 10 in the first direction X; wherein, in the first direction X, at least part of the positive projection of the connecting portion 51 and / or the brake cylinder piston 3 falls on the side wall of the abutting portion 71; wherein the opening 10 enables the input portion 11 to be inserted into the first cavity 8 and to be linked with the automatic cylinder piston to drive the brake cylinder piston 3 to move in the housing 1, and at the same time, at least one of the connecting member 5 and the brake cylinder piston 3 will abut against the cavity wall of the first cavity 8 to limit the moving stroke of the brake cylinder piston 3.

[0121] In some embodiments of the present application, the connecting member 5 is located at one end of the brake cylinder piston 3 away from the housing 1 and is arranged in a ring shape, and the connecting member 5 is sleeved on the brake cylinder piston 3; wherein, the size of the connecting member 5 is larger than the size of the opening 10, so that the connecting member 5 cannot leave the first cavity 8 from the opening 10, and thus the size setting of the connecting member 5 can limit the moving stroke of the brake cylinder piston 3.

[0122] In some embodiments of the present application, the hydraulic brake unit also includes an input part 11, at least a portion of the input part 11 extends from the opening 10 into the first cavity 8 and is linked with the brake cylinder piston 3 to drive the brake cylinder piston 3 to move in the cylinder hole 2; wherein, the input part 11 is connected to the brake pedal, so that when the driver steps on the brake pedal, the force can be transmitted to the brake cylinder piston 3 and drive the brake cylinder piston 3 to move, and the displacement information of the brake cylinder piston 3 is detected by the signal generator 41 and the signal detector 42, so that the brake motor can be controlled to rotate according to the displacement information of the brake cylinder piston 3 to provide braking force to the brake.

[0123] In some embodiments of the present application, the brake cylinder piston 3 includes a first sub-segment 31 and a second sub-segment 32 connected to each other in a first direction X, and a cross-section of the first sub-segment 31 is smaller than a cross-section of the second sub-segment 32, thereby forming a sinker between the first sub-segment 31 and the second sub-segment 32; wherein, the connecting member 5 is sleeved on the first sub-segment 31, and the sinker can limit the movement of the connecting member 5 relative to the brake cylinder piston 3 in the first direction X.

[0124] In some embodiments of the present application, the connecting member 5 is riveted onto the brake cylinder piston 3 .

[0125] In some embodiments of the present application, the signal detector 42 is located on one side of the signal generator 41 in the second direction Y and extends along the first direction X; such a configuration ensures that the moving stroke of the signal generator 41 is always within the detection range of the signal detector 42, thereby ensuring that the signal generator 41 and the signal detector 42 can cooperate to detect the displacement information of the brake cylinder piston 3.

[0126] The present application also proposes a brake assembly, including a hydraulic brake unit. The hydraulic brake unit is as described above. Since the brake assembly adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0127] The present application also proposes a vehicle, including a brake assembly. The brake assembly is as described above. Since the vehicle adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0128] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0129] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0130] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0131] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0132] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A hydraulic brake unit, characterized in that: include: A housing provided with a cylinder hole; a brake cylinder piston, at least a portion of which is movable within the cylinder bore; and A detection component, including a signal generator and a signal detector; Wherein, the signal generator is fixedly arranged on the side wall of the brake cylinder piston, and the signal detector is located on one side of the brake cylinder piston and cooperates with the signal generator to obtain the position information of the brake cylinder piston.

2. The hydraulic brake unit according to claim 1, characterized in that: The hydraulic brake unit also includes: A connecting piece, fixedly connected to the brake cylinder piston; Wherein, the signal generator is fixedly arranged on the side wall of the brake cylinder piston through the connecting piece.

3. The hydraulic brake unit according to claim 2, characterized in that: The signal generator and the connecting piece are integrally formed.

4. The hydraulic brake unit according to claim 3, characterized in that: The connecting piece and the signal generator are an integral casting.

5. The hydraulic brake unit according to claim 2, characterized in that: At least a portion of the signal generator is located within the connecting member.

6. The hydraulic brake unit according to claim 5, characterized in that: The connecting piece comprises: A connecting portion, fixedly connected to the brake cylinder piston; and A mounting portion, disposed on a side of the connecting portion away from the brake cylinder piston and connected to the connecting portion; Wherein, the mounting portion has a mounting groove, or the mounting portion and the connecting portion form a mounting groove; At least a portion of the signal generator is limited in the mounting groove.

7. The hydraulic brake unit according to claim 6, characterized in that: The signal generator is arranged around the connecting portion.

8. The hydraulic brake unit according to claim 6, characterized in that: The mounting portion includes a first sub-portion and a second sub-portion, wherein the first sub-portion and the second sub-portion are spaced apart in a first direction and are both connected to the connecting portion; Wherein, the mounting groove is formed between the first sub-section and the second sub-section, and the signal generator is connected to the first sub-section and / or the second sub-section.

9. The hydraulic brake unit according to claim 8, characterized in that: The signal generator is also connected to the connecting portion.

10. The hydraulic brake unit according to claim 8, characterized in that: The orthographic projection of the signal generator in the first direction completely falls on the first sub-portion and / or the second sub-portion.

11. The hydraulic brake unit according to any one of claims 1 to 10, characterized in that: The brake cylinder piston has a first position and a second position; Wherein, when the brake cylinder piston moves between the first position and the second position, at least a portion of the signal generator faces the signal detector.

12. The hydraulic brake unit according to any one of claims 1 to 10, characterized in that: The signal generator is a magnetic component; and The signal detector is used to detect the magnetic signal of the signal generator to obtain the position information of the brake cylinder piston.

13. The hydraulic brake unit according to any one of claims 1 to 10, characterized in that: At least a portion of the brake cylinder piston is located outside the cylinder bore; Wherein, the signal generator is connected to the portion of the brake cylinder piston located outside the cylinder hole.

14. The hydraulic brake unit according to claim 13, characterized in that: Also includes: A cover body connected to the housing, the cover body having a first cavity, the first cavity being in communication with the cylinder hole, and at least a portion of the brake cylinder piston being located in the first cavity; Wherein, the signal generator is located in the first cavity.

15. The hydraulic brake unit according to claim 14, characterized in that: The signal detector is connected to the cover body.

16. The hydraulic brake unit according to claim 15, characterized in that: The cover body also has a second cavity, and at least a portion of the signal detector is located in the second cavity.

17. The hydraulic brake unit according to claim 15, characterized in that: The cover body and the signal detector are integrally formed.

18. The hydraulic brake unit according to claim 14, characterized in that: The hydraulic brake unit comprises a connecting piece for mounting the signal generator, the connecting piece being connected to the brake cylinder piston; The cover body comprises: An abutment portion, at least a portion of which is arranged opposite to the brake cylinder piston and / or the connecting member in a first direction to limit the movable stroke of the brake cylinder piston.

19. The hydraulic brake unit according to claim 18, characterized in that: The abutting portion is provided with an opening, the opening is communicated with the first cavity, and the brake cylinder piston and / or the connecting member are arranged opposite to the opening in the first direction; Wherein, in the first direction, at least a portion of the orthographic projection of the connecting member and / or the brake cylinder piston falls on the side wall of the abutment portion.

20. The hydraulic brake unit according to claim 19, characterized in that: The hydraulic brake unit also includes: An input part, at least a portion of which extends from the opening into the first cavity and is linked with the brake cylinder piston to drive the brake cylinder piston to move in the cylinder hole.

21. The hydraulic brake unit according to any one of claims 1 to 10, characterized in that: The signal detector is located at one side of the signal generator in the second direction and extends along the first direction.

22. The hydraulic brake unit according to any one of claims 2 to 10, characterized in that: The connecting piece is sleeved on the brake cylinder piston.

23. A brake assembly, characterized in that: Comprising a hydraulic brake unit as claimed in any one of claims 1 to 22.

24. A vehicle, characterized in that: Comprising the brake assembly of claim 23.

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