Hydraulic brake device, travel sensor, and vehicle

Abstract

A hydraulic brake device, a stroke sensor and a vehicle, the hydraulic brake device comprising: a hydraulic valve block (100), a master cylinder housing (200) arranged on one side of the hydraulic valve block (100), a master cylinder part (210) arranged inside the master cylinder housing (200), the master cylinder part (210) comprising a piston (211), a push rod (212) and a magnet assembly (213); a control module (300) arranged on the other side of the hydraulic valve block (100), the control module (300) comprising a control substrate (310) and a connector (320) in electrical connection with the control substrate (310); and a stroke sensor (400) fixed inside the hydraulic valve block (100) and used for detecting the movement of the magnet assembly (213) to determine the movement amount of the piston (211), the stroke sensor (400) being connected with the connector (320) through a through hole in the hydraulic valve block (100). The hydraulic brake device can improve the positioning accuracy of the stroke sensor (400) in the hydraulic valve block (100).

Description

Technical Field

[0001] This application relates to the field of vehicles, and more specifically, to a hydraulic braking device, a stroke sensor, and a vehicle. Background Technology

[0002] A vehicle's braking system is a system that applies a certain braking force to the vehicle's wheels, thereby forcibly braking it to a certain extent. The function of the braking system is to force a moving vehicle to decelerate or even stop it according to the driver's or controller's requirements, or to keep a stopped vehicle stable under various road conditions (e.g., on a slope), or to maintain a stable speed for a vehicle traveling downhill.

[0003] Electro-hydraulic brake (EHB) systems, as a popular braking system, typically include a hydraulic braking device. For hydraulic brakes where the master cylinder housing and hydraulic valve block are separate, the stroke sensor is usually located outside the master cylinder housing and electrically connected to the control module via a through-hole in the hydraulic valve block. However, due to the considerable distance between the master cylinder housing and the control module, the positioning accuracy of the stroke sensor is difficult to guarantee, increasing the complexity of the electrical connection between the stroke sensor and the control module.

[0004] Therefore, improving the positioning accuracy of stroke sensors has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides a hydraulic braking device, a stroke sensor, and a vehicle, which can improve the positioning accuracy of the stroke sensor.

[0006] In a first aspect, a hydraulic braking device is provided, comprising: a hydraulic valve block 100 having a through hole; a master cylinder housing 200 disposed on one side of the hydraulic valve block 100, the master cylinder housing 200 having a master cylinder section 210 inside, the master cylinder section 210 including a piston 211, a push rod 212 and a magnet assembly 213, the piston 211 and the push rod 212 being connected, and the magnet assembly 213 moving with the piston 211; a control module 300 disposed on the other side of the hydraulic valve block 100, the control module 300 including a control base plate 310 and a connector 320 electrically connected to the control base plate 310; and a stroke sensor 400 fixed inside the hydraulic valve block 100 for detecting the movement of the magnet assembly 213 to determine the amount of movement of the piston 211, the stroke sensor 400 being connected to the connector 320 through the through hole in the hydraulic valve block 100.

[0007] According to the solution of this application embodiment, for a hydraulic braking device where the master cylinder housing and the hydraulic valve block are separated, the stroke sensor is fixed inside the hydraulic valve block. This ensures the positioning accuracy of the stroke sensor within the hydraulic valve block, thereby improving the docking accuracy between the stroke sensor and the control module, which is beneficial for achieving docking between the stroke sensor and the control module. Furthermore, the solution of this application embodiment ensures the concentricity of the hole-shaft fit between the stroke sensor and the hydraulic valve block, which helps avoid the stroke sensor bearing assembly stress.

[0008] The control module 300, hydraulic valve block 100 and main cylinder housing 200 constitute a three-layer structure.

[0009] The movement of the magnet assembly 213 with the piston 211 can be understood as the magnet assembly 213 being relatively fixed to the piston 211.

[0010] For example, the magnet assembly 213 may be disposed inside the piston 211 and move with the piston 211.

[0011] Alternatively, the magnet assembly 213 can be separated from the piston 211, as long as the relative positions of the magnet assembly 213 and the piston 211 are fixed.

[0012] The fact that the stroke sensor 400 is fixed inside the hydraulic valve block 100 means that the fixing component of the stroke sensor 400 is located inside the hydraulic valve block 100, rather than that the entire stroke sensor 400 is located inside the hydraulic valve block 100.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the stroke sensor 400 includes: a stroke sensor housing 410, a fixing component 420, a first positioning component 431, and a second positioning component 432 disposed on the stroke sensor housing 410, wherein the fixing component 420, the first positioning component 431, and the second positioning component 432 are used to fix the stroke sensor housing 410 inside the hydraulic valve block 100.

[0014] The stroke sensor 400 is fixed inside the hydraulic valve block 100 by a fixing component and two positioning components.

[0015] It should be understood that the stroke sensor 400 may also include one or more fixing components. Alternatively, the stroke sensor 400 may also include two or more positioning components, and this application embodiment does not limit this.

[0016] It should be understood that the fixing component and the positioning component can be the same or different. That is, if a fixing component can be used to achieve positioning, then the fixing component can also be used as a positioning component.

[0017] According to the solution of the embodiment of this application, the positioning accuracy of the stroke sensor in the hydraulic valve block can be further improved by using a fixing component and two positioning components.

[0018] Furthermore, in the solution of this application embodiment, the stroke sensor can be fixed with only one fixed end. For example, the stroke sensor can be fixed with a single screw, which reduces processing costs and processing time.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the fixed component 420, the first positioning component 431, or the second positioning component 432 satisfies at least one of the following: the distance between the first positioning component 431 and the second positioning component 432 is less than or equal to a second target threshold; the distance between the first positioning component 431 and the fixed component 420 is less than or equal to a third target threshold; or the distance between the second positioning component 432 and the fixed component 420 is less than or equal to a fourth target threshold.

[0020] According to the scheme of the embodiment of this application, the distance between the fixing component and the positioning component is set closer, which can strengthen the close cooperation between the hydraulic valve block and the stroke sensor, improve the positioning accuracy, and facilitate the precise fixing of the stroke sensor and the hydraulic valve block.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the first positioning component 431 includes: a first sealing ring 431 located between a through hole in the stroke sensor housing 410 and the hydraulic valve block 100.

[0022] The first sealing ring 431 can also be used to prevent liquid leakage.

[0023] According to the solution of the embodiment of this application, the positioning accuracy of the stroke sensor is improved. For example, the central axis of the first sealing ring is used as the main positioning reference and the positioning pin is used as the secondary positioning reference. This ensures the concentricity of the hole-shaft fit between the stroke sensor and the hydraulic valve block, so that the first sealing ring can be in a free assembly state, which improves the sealing effect, reduces the risk of liquid leakage, helps prevent liquid from entering the control module, and improves the reliability of the braking device.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the stroke sensor 400 further includes a connection terminal 460 disposed on the stroke sensor housing 410, the connection terminal 460 being connected to the connector 320; the distance between the first positioning component 431 and the connection terminal 460 is less than or equal to the first target threshold.

[0025] For example, the connection terminal 460 can be a metal plug, a spring, or a metal contact.

[0026] According to the scheme of the embodiment of this application, the distance between the first positioning component 431 and the connecting terminal 460 is set to be relatively close, and the positioning accuracy of the stroke sensor near the connecting terminal is relatively high, which can further improve the docking accuracy between the stroke sensor and the control module, that is, it is beneficial to realize the docking of the stroke sensor and the control module.

[0027] In conjunction with the first aspect, in some implementations of the first aspect, the second positioning component 432 includes: a positioning pin 432.

[0028] Accordingly, the hydraulic valve block 100 is provided with a positioning hole that mates with the positioning pin 432.

[0029] The stroke sensor 400 can constrain its own position through the positioning pin 432.

[0030] In conjunction with the first aspect, in some implementations of the first aspect, the stroke sensor 400 further includes a sensing element 440 disposed inside the stroke sensor housing 410, and the sensing element 440 is installed inside the master cylinder housing 200.

[0031] In this embodiment, the stroke sensor is placed inside the hydraulic valve block and the master cylinder housing, and is protected by the hydraulic valve block and the master cylinder housing. Since the hydraulic valve block and the master cylinder housing are usually metal parts, this prevents the stroke sensor from being impacted by foreign objects.

[0032] In conjunction with the first aspect, in some implementations of the first aspect, the stroke sensor 400 further includes a sensing substrate 450 disposed within the stroke sensor housing 410, a sensing element 440 fixed on the sensing substrate 450, the sensing substrate 450 being electrically connected to the sensing element 440, and the sensing substrate 450 being electrically connected to the connection terminal 460.

[0033] The sensing element 440 can transmit the output electrical signal to the control module 300 through the connection terminal 460.

[0034] For example, the sensing substrate 450 is fixed inside the travel sensor housing 410. The sensing element 440 can be fixed to the sensing substrate 450 by soldering and is electrically connected to the sensing substrate 450.

[0035] In conjunction with the first aspect, in some implementations of the first aspect, the travel sensor housing 410 is filled with potting material, and the sensing substrate 450 and the sensing element 440 are covered by the potting material.

[0036] Filling the travel sensor housing 410 with potting material can be done by filling a local area inside the travel sensor housing 410 with potting material, or by filling the entire area inside the travel sensor housing 410 with potting material.

[0037] For example, the potting material can be a resin material.

[0038] In this embodiment, the cured potting material can possess waterproof and dustproof capabilities, as well as abrasion resistance and pressure resistance. This protects the covered sensing element.

[0039] In conjunction with the first aspect, in some implementations of the first aspect, the sensing substrate 450 is perpendicular to the control substrate 310.

[0040] The electrical connection between the sensing substrate 450 and the control module can be a Z-shaped connection or a straight connection. Alternatively, the central axis of the sensing substrate 450 is parallel to the central axis of the sensor housing 410, or the central axis of the sensing substrate 450 is coaxial with the central axis of the sensor housing 410.

[0041] According to the scheme of the embodiment of this application, the central axis of the sensing substrate is parallel or coaxial with the main reference for positioning, which can further reduce the assembly tolerance and thus reduce the assembly stress on the stroke sensor 400.

[0042] In conjunction with the first aspect, some implementations of the first aspect also include a second sealing ring 500 disposed between the hydraulic valve block 100 and the main cylinder housing 200.

[0043] Specifically, a second sealing ring 500 is provided at the connection between the cavity in the hydraulic valve block 100 that houses the stroke sensor 400 and the main cylinder housing.

[0044] According to the solution of this application embodiment, a second sealing ring is provided between the hydraulic valve block and the master cylinder housing, which can achieve partial sealing of the stroke sensor and prevent the liquid leaked between the hydraulic valve block and the master cylinder housing from entering the control module. That is, it prevents the leaked liquid from entering the control module through the cavity of the hydraulic valve block and the through hole of the hydraulic valve block, thereby improving the reliability of the braking device.

[0045] Secondly, a stroke sensor is provided for use in a hydraulic braking device. The hydraulic braking device includes: a hydraulic valve block 100 with a through hole; a master cylinder housing 200 disposed on one side of the hydraulic valve block 100, with a master cylinder section 210 inside the master cylinder housing 200, the master cylinder section 210 including a piston 211, a push rod 212 and a magnet assembly 213, the piston 211 and the push rod 212 being connected, and the magnet assembly 213 moving with the piston 211; a control module 300 disposed on the other side of the hydraulic valve block 100; and a stroke sensor 400 connected to the control module 300 through the through hole in the hydraulic valve block 100. The stroke sensor includes: a stroke sensor housing 410, a fixing component 420, a first positioning component 431 and a second positioning component 432 disposed on the stroke sensor housing 410; the fixing component 420, the first positioning component 431 and the second positioning component 432 are used to fix the stroke sensor housing 410 inside the hydraulic valve block 100 in the hydraulic braking device.

[0046] According to the solution of this application embodiment, for a hydraulic braking device where the master cylinder housing and the hydraulic valve block are separated, the stroke sensor is fixed inside the hydraulic valve block. This ensures the positioning accuracy of the stroke sensor within the hydraulic valve block, thereby improving the docking accuracy between the stroke sensor and the control module, which is beneficial for achieving docking between the stroke sensor and the control module. Furthermore, the solution of this application embodiment ensures the concentricity of the hole-shaft fit between the stroke sensor and the hydraulic valve block, which helps avoid the stroke sensor bearing assembly stress.

[0047] Furthermore, the positioning accuracy of the stroke sensor in the hydraulic valve block can be further improved by using a fixed component and two positioning components.

[0048] Furthermore, in the solution of this application embodiment, the stroke sensor can be fixed with only one fixed end. For example, the stroke sensor can be fixed with a single screw, which reduces processing costs and processing time.

[0049] In conjunction with the second aspect, in some implementations of the second aspect, the first positioning component 431 includes a first sealing ring 431 located between a through hole in the stroke sensor housing 410 and the hydraulic valve block 100.

[0050] In conjunction with the second aspect, some implementations of the second aspect further include: a connection terminal 460 disposed on the stroke sensor housing 410, the connection terminal 460 being connected to the control module 300 in the hydraulic braking device; and the distance between the first positioning component 431 and the connection terminal 460 being less than or equal to the first target threshold.

[0051] In conjunction with the second aspect, in some implementations of the second aspect, the second positioning component 432 includes: a positioning pin 432.

[0052] In conjunction with the second aspect, some implementations of the second aspect also include: a sensing element 440 disposed inside the stroke sensor housing 410, the sensing element 440 being installed inside the master cylinder housing 200 of the hydraulic braking device.

[0053] In conjunction with the second aspect, some implementations of the second aspect further include: a sensing substrate 450 disposed within the travel sensor housing 410, a sensing element 440 fixed on the sensing substrate 450, the sensing substrate 450 being electrically connected to the sensing element 440, and the sensing substrate 450 being electrically connected to the connection terminal 460.

[0054] In conjunction with the second aspect, in some implementations of the second aspect, the travel sensor housing 410 is filled with potting material, and the sensing substrate 450 and the sensing element 440 are covered by the potting material.

[0055] In conjunction with the second aspect, in some implementations of the second aspect, the sensing substrate 450 is perpendicular to the control substrate 310 in the control module 300.

[0056] It should be understood that the extensions, limitations, explanations and descriptions of the relevant content in the first aspect above also apply to the same content in the second aspect.

[0057] Thirdly, a drive-by-wire electro-hydraulic braking system is provided, including a hydraulic braking device as described in the first aspect or any possible implementation thereof.

[0058] Fourthly, a vehicle is provided that includes a hydraulic braking device as described in the first aspect or any possible implementation thereof. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the structure of a hydraulic braking device provided in an embodiment of this application;

[0060] Figure 2 This is a schematic diagram of the structure of a stroke sensor provided in an embodiment of this application;

[0061] Figure 3 This is a cross-sectional schematic diagram of a hydraulic braking device provided in an embodiment of this application. Detailed Implementation

[0062] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0063] For hydraulic braking devices where the master cylinder housing and hydraulic valve block are separate, the sensing element of the stroke sensor is located outside the master cylinder housing and electrically connected to the control module via a through-hole in the hydraulic valve block. A sealing ring prevents fluid leakage between the stroke sensor and the hydraulic valve block. Due to design dimensions and assembly tolerances, the positioning accuracy of the stroke sensor within the hydraulic valve block is difficult to guarantee, leading to a series of problems. For example, the positioning accuracy of the stroke sensor within the hydraulic valve block affects the docking accuracy between the stroke sensor and the control module. Poor positioning accuracy increases the difficulty of docking between the stroke sensor and the control module, affecting their electrical connection. Furthermore, the positioning accuracy of the stroke sensor within the hydraulic valve block affects the fit between the hole and shaft of the stroke sensor and the hydraulic valve block. Poor positioning accuracy makes it impossible to guarantee proper concentricity between the hole and shaft, causing the stroke sensor to constantly bear assembly stress.

[0064] This application provides a hydraulic braking device in which a stroke sensor is fixed inside a hydraulic valve block, ensuring the positioning accuracy of the stroke sensor within the hydraulic valve block.

[0065] The solutions in the embodiments of this application are described below with reference to the accompanying drawings.

[0066] Figure 1 This is a three-dimensional structural diagram of a hydraulic braking device provided in an embodiment of this application. Figure 1 The hydraulic braking device shown includes a hydraulic valve block 100, a master cylinder housing 200, a control module 300, and a stroke sensor 400.

[0067] The hydraulic valve block 100 is provided with a through hole.

[0068] In this embodiment, the hydraulic valve block 100 may also be referred to as a hydraulic block, valve block, or hydraulic valve, etc.

[0069] The main cylinder housing 200 is located on one side of the hydraulic valve block 100.

[0070] In other words, the master cylinder housing 200 is separated from the hydraulic valve block 100.

[0071] The main cylinder housing 200 is provided with a main cylinder section 210, which includes a piston 211, a push rod 212 and a magnet assembly 213. The piston 211 and the push rod 212 are connected, and the magnet assembly 213 moves with the piston 211.

[0072] like Figure 1 As shown, the master cylinder section 210 protrudes from the master cylinder housing 200.

[0073] The movement of the magnet assembly 213 with the piston 211 can be understood as the magnet assembly 213 being relatively fixed to the piston 211.

[0074] For example, the magnet assembly 213 may be disposed inside the piston 211 and move with the piston 211.

[0075] Alternatively, the magnet assembly 213 can be separated from the piston 211, as long as the relative positions of the magnet assembly 213 and the piston 211 are fixed.

[0076] The control module 300 is located on the other side of the hydraulic valve block 100.

[0077] In other words, the control module 300, the hydraulic valve block 100, and the main cylinder housing 200 constitute a three-layer structure.

[0078] The control module 300 includes a control board 310 and a connector 320 electrically connected to the control board 310.

[0079] For example, the control module 300 may include an electronic control unit (ECU).

[0080] The stroke sensor 400 is fixed inside the hydraulic valve block 100 and is used to detect the movement of the magnet assembly 213 to determine the amount of movement of the piston 211. The stroke sensor 400 is connected to the connector 320 through a through hole in the hydraulic valve block 100.

[0081] Specifically, the stroke sensor 400 is fixed in the cavity inside the hydraulic valve block 100.

[0082] The magnet assembly 213 moves with the piston 211, causing a change in the magnetic field of the stroke sensor 400. The stroke sensor senses the change and outputs an electrical signal.

[0083] It should be noted that the stroke sensor 400 is fixed inside the hydraulic valve block 100, which means that the fixing component of the stroke sensor 400 is located inside the hydraulic valve block 100, and does not mean that the entire stroke sensor 400 is located inside the hydraulic valve block 100.

[0084] According to the solution of this application embodiment, for a hydraulic braking device where the master cylinder housing and the hydraulic valve block are separated, the stroke sensor is fixed inside the hydraulic valve block. This ensures the positioning accuracy of the stroke sensor within the hydraulic valve block, thereby improving the docking accuracy between the stroke sensor and the control module, which is beneficial for achieving docking between the stroke sensor and the control module. Furthermore, the solution of this application embodiment ensures the concentricity of the hole-shaft fit between the stroke sensor and the hydraulic valve block, which helps avoid the stroke sensor bearing assembly stress.

[0085] For example, the magnet assembly 213 may include a permanent magnet and a housing. That is, the stroke sensor 400 can determine the amount of movement of the piston 211 by detecting the movement of the permanent magnet.

[0086] Furthermore, such as Figure 1 As shown, the master cylinder section 210 may also include a spring 214. The magnet assembly 213 is in close cooperation with the spring 214 and the piston 211. The piston 211 is provided with a stroke limit feature, and under the action of the push rod force and the spring force, the piston 211 can reciprocate within the master cylinder housing.

[0087] It should be noted that the components in the main cylinder section and the positional relationship between the components in the embodiments of this application are only examples. In actual applications, the main cylinder section 210 may include more or fewer components, and the positional relationship between the components can also be set as needed. Other types of main cylinder sections in the prior art can also be applied to the solutions of the embodiments of this application. The embodiments of this application do not limit the specific structure of the main cylinder section.

[0088] Optionally, a second sealing ring 500 is provided between the hydraulic valve block 100 and the main cylinder housing 200.

[0089] Specifically, a second sealing ring 500 is provided at the connection between the cavity in the hydraulic valve block 100 that houses the stroke sensor 400 and the main cylinder housing.

[0090] A second sealing ring is provided between the hydraulic valve block 100 and the master cylinder housing 200 to achieve partial sealing of the stroke sensor, preventing leaked liquid between the hydraulic valve block and the master cylinder housing from entering the control module. In other words, it prevents leaked liquid from entering the control module through the cavity of the hydraulic valve block and the through hole of the hydraulic valve block, thereby improving the reliability of the braking device.

[0091] It should be noted that there is an overall seal between the control module and the hydraulic valve block, which protects all the electronic components inside the control module.

[0092] Figure 2 A schematic diagram of a travel sensor provided in an embodiment of this application is shown. It should be understood that... Figure 2 This is merely an example of a travel sensor in the embodiments of this application, and does not limit the structure of the travel sensor in the embodiments of this application.

[0093] like Figure 2 As shown, the stroke sensor 400 includes a stroke sensor housing 410, a fixing component 420, a first positioning component 431, and a second positioning component 432 disposed on the stroke sensor housing 410. The fixing component 420, the first positioning component 431, and the second positioning component 432 are used to fix the stroke sensor housing 410 inside the hydraulic valve block 100.

[0094] In other words, the stroke sensor 400 is fixed inside the hydraulic valve block 100 by a fixing component and two positioning components.

[0095] It should be understood that the stroke sensor 400 may also include one or more fixing components. Alternatively, the stroke sensor 400 may also include two or more positioning components, and this application embodiment does not limit this.

[0096] It should be understood that the fixing component and the positioning component can be the same or different. That is, if a fixing component can be used to achieve positioning, then the fixing component can also be used as a positioning component.

[0097] For example, the fixing component 420 can be fixed by screws. For instance, as... Figure 1 or Figure 2 As shown, the fixing component 420 may include a threaded hole, and correspondingly, the hydraulic valve block 100 has a threaded hole that mates with this threaded hole, and the two are fixed together by screws 600. In other words, the stroke sensor 400 can be fixed to the hydraulic valve block 100 by screws. It should be understood that... Figure 1 and Figure 2 The example provided only uses screw fixing and does not limit the fixing method in the embodiments of this application.

[0098] Alternatively, the fixing component 420 can be fixed by interference fit. For example, the fixing component 420 may include a positioning hole, and a positioning shaft that mates with the positioning hole is provided inside the hydraulic valve block 100. The fixing method between the positioning hole and the positioning shaft is interference fit. In other words, the stroke sensor 400 can be fixed inside the hydraulic valve block 100 by interference fit. In this case, the fixing component 420 can be used to position the stroke sensor 400, that is, the fixing component 420 can also be used as a positioning component.

[0099] Alternatively, the fixing component 420 can be fixed by press-fitting. In other words, the stroke sensor 400 can be fixed to the hydraulic valve block 100 by press-fitting.

[0100] Optionally, the second positioning component 432 may include a positioning pin 432. Accordingly, the hydraulic valve block 100 is provided with a positioning hole that mates with the positioning pin 432, so that the stroke sensor 400 can constrain its own position through the positioning pin 432.

[0101] Optionally, the first positioning component 431 includes an area on the stroke sensor housing 410 that has an interference fit with the through hole of the hydraulic valve block 100. In other words, there is an interference fit between the stroke sensor housing 410 and the through hole of the hydraulic valve block 100. The positioning method of the first positioning component 431 can be interference fit positioning.

[0102] Optionally, the first positioning component 431 includes a first sealing ring 431 disposed on the stroke sensor housing 410. The first sealing ring 431 is located between the stroke sensor housing 410 and the through hole in the hydraulic valve block 100.

[0103] The first sealing ring 431 can also be used to prevent liquid leakage.

[0104] It should be understood that the first sealing ring 431 is optional.

[0105] For example, if the second sealing ring 500 is present, the first sealing ring 431 may not be required.

[0106] Alternatively, if the first sealing ring 431 is present, the second sealing ring 500 may not be required.

[0107] For example, if the first sealing ring 431 is present and the stroke sensor 400 has dustproof and waterproof capabilities, the second sealing ring 500 may not be provided between the hydraulic valve block 100 and the master cylinder housing 200.

[0108] Furthermore, the distance between the first positioning group / 431 and the second positioning component 432 can be less than or equal to the second target threshold.

[0109] For example, the distance between the first sealing ring 431 and the locating pin 432 can be less than or equal to 2 cm.

[0110] Furthermore, the distance between the first positioning component 431 and the fixing component 420 can be less than or equal to the third target threshold.

[0111] Alternatively, the distance between the second positioning component 432 and the fixing component 420 may be less than or equal to the fourth target threshold.

[0112] This strengthens the close cooperation between the hydraulic valve block and the stroke sensor, improving positioning accuracy.

[0113] In this way, the positioning accuracy of the stroke sensor in the hydraulic valve block can be further improved by using a fixing component and two positioning components. The fixing component and the positioning component are usually located close to each other, which is conducive to achieving precise fixation of the stroke sensor and the hydraulic valve block.

[0114] Furthermore, in the solution of this application embodiment, the stroke sensor can be fixed with only one fixed end. For example, the stroke sensor can be fixed with a single screw, which reduces processing costs and processing time.

[0115] Furthermore, the solution in this application improves the positioning accuracy of the stroke sensor. For example, by using the central axis of the first sealing ring as the primary positioning reference and the positioning pin as the secondary positioning reference, the concentricity of the hole-shaft fit between the stroke sensor and the hydraulic valve block is ensured, allowing the first sealing ring to be in a free assembly state, improving the sealing effect, reducing the risk of liquid leakage, helping to prevent liquid from entering the control module, and improving the reliability of the braking device.

[0116] Optionally, the stroke sensor 400 further includes a connection terminal 460 disposed on the stroke sensor housing 410. The connection terminal 460 is connected to the connector 320 of the control module 300. The distance between the first positioning component 431 and the connection terminal 460 is less than or equal to a first target threshold.

[0117] For example, the distance between the first sealing ring 431 and the connecting terminal 460 is less than or equal to the first target threshold.

[0118] In this way, the positioning accuracy of the stroke sensor near the connection terminal is relatively high, which can further improve the docking accuracy between the stroke sensor and the control module, thus facilitating the docking of the stroke sensor and the control module.

[0119] For example, the connection between the connection terminal 460 and the travel sensor housing 410 can be made by injection molding or by mechanical fixing.

[0120] For example, such as Figure 1 or Figure 2 As shown, the connecting terminal 460 can be a metal connector. That is, the electrical connection between the connecting terminal 460 and the connector 320 is achieved through a metal connector. It should be understood that... Figure 1 or Figure 2 The connection terminal 460 in the example is merely an example and does not constitute a limitation on the embodiments of this application.

[0121] Alternatively, the connecting terminal 460 can be a spring. That is, the electrical connection between the connecting terminal 460 and the connector 320 is achieved through spring contact.

[0122] Alternatively, the connection terminal 460 can be a metal contact. That is, the electrical connection between the connection terminal 460 and the connector 320 is achieved through metal contact.

[0123] It should be understood that the connecting terminal 460 can also take other forms, and this application embodiment does not limit this, as long as the connecting terminal 460 and the connector 320 can achieve an electrical connection.

[0124] Optionally, the stroke sensor 400 also includes a sensing element 440 disposed inside the stroke sensor housing 410. The sensing element 440 is mounted inside the master cylinder housing 200.

[0125] Optionally, the stroke sensor 400 further includes a sensing substrate 450 disposed within the stroke sensor housing 410, and a sensing element 440 fixed on the sensing substrate 450. The sensing substrate 450 is electrically connected to the sensing element 440, and the sensing substrate 450 is electrically connected to the connection terminal 460.

[0126] The sensing element 440 can transmit the output electrical signal to the control module 300 through the connection terminal 460.

[0127] For example, such as Figure 2 As shown, the sensing substrate 450 is fixed inside the travel sensor housing 410. The sensing element 440 can be fixed to the sensing substrate 450 by soldering and is electrically connected to the sensing substrate 450.

[0128] Figure 3 A partial cross-sectional schematic diagram of the hydraulic braking device is shown. It should be understood that... Figure 3 Can be used as Figure 1 A partial cross-sectional schematic diagram of the hydraulic braking device shown.

[0129] The sensing element 440 is disposed inside the master cylinder housing 200 and close to the magnet assembly 213. The sensing element 440 can determine the amount of piston movement by detecting the movement of the magnet assembly. Specifically, when the magnet assembly 213 moves, the magnetic field at the sensing element 440 changes. The sensing element 440 can determine the amount of piston movement based on the change in the magnetic field and output a corresponding electrical signal. Positioning the sensing element 440 near the magnet assembly 213, minimizing the distance between them (i.e., the air gap), can further improve the signal accuracy of the stroke sensor 400.

[0130] In this embodiment, the stroke sensor is placed inside the hydraulic valve block and the master cylinder housing, and is protected by the hydraulic valve block and the master cylinder housing. Since the hydraulic valve block and the master cylinder housing are usually metal parts, this prevents the stroke sensor from being impacted by foreign objects.

[0131] Optionally, the stroke sensor 400 can be a Hall sensor or other types of sensors. In other words, the sensing element 440 can be a Hall element or other types of sensing elements, which is not limited in this application.

[0132] like Figure 2 As shown, when the sensing substrate 450 is fixed inside the travel sensor housing 410, the sensing substrate and the sensing element can be sealed, that is, the travel sensor is partially sealed to protect the sensing element.

[0133] Optionally, the travel sensor housing 410 is filled with potting material, and the sensing substrate 450 and sensing element 440 are covered by the potting material.

[0134] For example, the cured potting material can possess waterproof and dustproof properties, as well as abrasion resistance and compressive strength. This protects the covered sensing element. For instance, the potting material can be a resin material.

[0135] Filling the travel sensor housing 410 with potting material can be done by filling a local area inside the travel sensor housing 410 with potting material, or by filling the entire area inside the travel sensor housing 410 with potting material.

[0136] It should be understood that potting material is optional, and the sensing element can also be exposed. Alternatively, the sensing element can be protected in other ways, such as by providing a cover plate to protect it.

[0137] Optionally, the sensing substrate 450 is perpendicular to the control substrate 310.

[0138] In other words, the electrical connection between the sensing substrate 450 and the control module can be a Z-shaped connection or a straight connection. Alternatively, the central axis of the sensing substrate 450 is parallel to the central axis of the sensor housing 410, or the central axis of the sensing substrate 450 is coaxial with the central axis of the sensor housing 410. In this way, having the central axis of the sensing substrate parallel to or coaxial with the main positioning reference can further reduce assembly tolerances, thereby reducing the assembly stress on the stroke sensor 400.

[0139] This application also provides a drive-by-wire electro-hydraulic braking system, which includes the aforementioned hydraulic braking device. This hydraulic braking device is connected to a braking actuator in the drive-by-wire electro-hydraulic braking system and is used to generate braking hydraulic pressure based on the amount of movement of the braking actuator.

[0140] It should be understood that the aforementioned drive-by-wire electro-hydraulic braking system can be applied in vehicles, and the aforementioned braking actuator can be the vehicle's foot pedal; this application does not limit this application. When applied in a vehicle, the hydraulic braking device is connected to the vehicle's foot pedal and is used to generate braking hydraulic pressure based on the amount of foot pedal movement to control the vehicle's stable driving.

[0141] This application also provides a vehicle that includes the aforementioned hydraulic braking device or the aforementioned drive-by-wire hydraulic braking system. It should be understood that the vehicle can be an electric vehicle, such as a pure electric vehicle, a range-extended electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, or a new energy vehicle, etc., and this application does not specifically limit it in this regard.

[0142] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0143] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0144] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0145] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0146] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0147] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0148] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0149] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0150] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hydraulic braking device, characterized in that, include: A hydraulic valve block (100) is provided with a through hole; A main cylinder housing (200) is disposed on one side of the hydraulic valve block (100). A main cylinder section (210) is disposed inside the main cylinder housing (200). The main cylinder section (210) includes a piston (211), a push rod (212), and a magnet assembly (213). The piston (211) and the push rod (212) are connected. The magnet assembly (213) moves with the piston (211). A control module (300) is disposed on the other side of the hydraulic valve block (100). The control module (300) includes a control board (310) and a connector (320) electrically connected to the control board (310). A stroke sensor (400) is fixed inside the hydraulic valve block (100) to detect the movement of the magnet assembly (213) to determine the amount of movement of the piston (211). The stroke sensor (400) is connected to the connector (320) through a through hole in the hydraulic valve block (100). The stroke sensor (400) includes: a stroke sensor housing (410) and a first positioning component (431) disposed in the stroke sensor housing (410). The first positioning component (431) includes an area on the stroke sensor housing (410) that has an interference fit with a through hole of the hydraulic valve block (100). The first positioning component (431) is used to fix the stroke sensor housing (410) inside the hydraulic valve block (100).

2. The apparatus according to claim 1, characterized in that, The stroke sensor (400) further includes a fixing component (420) and a second positioning component (432) disposed on the stroke sensor housing (410), the fixing component (420) and the second positioning component (432) being used to fix the stroke sensor housing (410) inside the hydraulic valve block (100).

3. The apparatus according to claim 2, characterized in that, The first positioning component (431) includes: A first sealing ring is located between the through hole in the stroke sensor housing (410) and the hydraulic valve block (100).

4. The apparatus according to claim 2, characterized in that, The stroke sensor (400) further includes a connection terminal (460) disposed on the stroke sensor housing (410), and the connection terminal (460) is connected to the connector (320); The distance between the first positioning component (431) and the connection terminal (460) is less than or equal to the first target threshold.

5. The apparatus according to any one of claims 2 to 4, characterized in that, The second positioning component (432) includes: a positioning pin (432).

6. The apparatus according to any one of claims 2 to 4, characterized in that, The stroke sensor (400) also includes a sensing element (440) disposed inside the stroke sensor housing (410), and the sensing element (440) is installed inside the master cylinder housing (200).

7. The apparatus according to claim 6, characterized in that, The stroke sensor (400) further includes a sensing substrate (450) disposed within the stroke sensor housing (410), the sensing element (440) is fixed on the sensing substrate (450), the sensing substrate (450) is electrically connected to the sensing element (440), and the sensing substrate (450) is electrically connected to the connection terminal (460) on the stroke sensor (400).

8. The apparatus according to claim 7, characterized in that, The travel sensor housing (410) is filled with potting material, and the sensing substrate (450) and the sensing element (440) are covered by the potting material.

9. The apparatus according to claim 7, characterized in that, The sensing substrate (450) is perpendicular to the control substrate (310).

10. The apparatus according to any one of claims 1 to 4, characterized in that, It also includes a second sealing ring (500) disposed between the hydraulic valve block (100) and the master cylinder housing (200).

11. A stroke sensor, characterized in that, An application is made in a hydraulic braking device, the hydraulic braking device comprising: a hydraulic valve block (100) having a through hole; a master cylinder housing (200) disposed on one side of the hydraulic valve block (100), the master cylinder housing (200) having a master cylinder section (210) inside, the master cylinder section (210) including a piston (211), a push rod (212) and a magnet assembly (213), the piston (211) and the push rod (212) being connected, the magnet assembly (213) moving with the piston (211); a control module (300) disposed on the other side of the hydraulic valve block (100); and a stroke sensor (400) connected to the control module (300) through the through hole in the hydraulic valve block (100). The stroke sensor (400) includes: Stroke sensor housing (410). The fixed component (420), the first positioning component (431), and the second positioning component (432) are disposed on the travel sensor housing (410). The fixing component (420), the first positioning component (431), and the second positioning component (432) are used to fix the stroke sensor housing (410) inside the hydraulic valve block (100) in the hydraulic braking device. The first positioning component (431) includes an area on the stroke sensor housing (410) that has an interference fit with the through hole of the hydraulic valve block (100).

12. The stroke sensor according to claim 11, characterized in that, The first positioning component (431) includes: A first sealing ring is located between the through hole in the stroke sensor housing (410) and the hydraulic valve block (100).

13. The stroke sensor according to claim 11, characterized in that, Also includes: A connection terminal (460) is provided on the travel sensor housing (410), and the connection terminal (460) is connected to the control module (300) in the hydraulic braking device; The distance between the first positioning component (431) and the connection terminal (460) is less than or equal to the first target threshold.

14. The stroke sensor according to any one of claims 11 to 13, characterized in that, The second positioning component (432) includes: a positioning pin (432).

15. The stroke sensor according to any one of claims 11 to 13, characterized in that, Also includes: The sensing element (440) is disposed inside the stroke sensor housing (410), and the sensing element (440) is installed inside the master cylinder housing (200) of the hydraulic braking device.

16. The stroke sensor according to claim 15, characterized in that, Also includes: The sensing substrate (450) is disposed inside the travel sensor housing (410), the sensing element (440) is fixed on the sensing substrate (450), the sensing substrate (450) is electrically connected to the sensing element (440), and the sensing substrate (450) is electrically connected to the connection terminal (460) on the travel sensor (400).

17. The stroke sensor according to claim 16, characterized in that, The travel sensor housing (410) is filled with potting material, and the sensing substrate (450) and the sensing element (440) are covered by the potting material.

18. The stroke sensor according to claim 16, characterized in that, The sensing substrate (450) is perpendicular to the control substrate (310) in the control module (300).

19. A drive-by-wire electro-hydraulic braking system, characterized in that, Includes the hydraulic braking device as described in any one of claims 1 to 10.

20. A vehicle, characterized in that, Includes the hydraulic braking device as described in any one of claims 1 to 10.

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