Friction lining, friction lining thickness monitoring device, brake and vehicle

Abstract

The utility model discloses a friction liner which comprises a first wear warning surface embedded into the friction liner at a first depth, a plurality of sections of first wear warning lines arranged in at least one direction are arranged on the first wear warning surface, and the plurality of sections of first wear warning lines are sequentially connected, a first current path is formed when current is accessed; the first depth is the distance from the contact surface to the first abrasion warning surface, the contact surface is the surface, making contact with a brake disc, on the friction pad during braking, and the contact surface is parallel to the first abrasion warning surface; according to the friction pad, the abrasion warning lines are arranged in the friction pad, the abrasion state is fed back through the current magnitude of the abrasion warning lines, and meanwhile, the abrasion warning lines are folded back in the height direction and the length direction of the friction pad in a reciprocating mode, so that the abrasion warning lines are evenly distributed in the whole abrasion warning face; the purpose of preventing misjudgment caused by uneven abrasion of the friction liners can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle brake systems, and in particular to a friction lining, a monitoring device, a brake and a vehicle. Background Art

[0002] The life of a vehicle's brake lining usually refers to the remaining wear of the brake lining. At the same time, as users' requirements for a healthy vehicle experience continue to increase, the demand for continuous acquisition of the wear status of the vehicle's brake linings is also increasing. At present, most of the industry monitors the wear status of the friction pads by installing mechanical alarms on the vehicle's brake linings or by adding other sensors. Although the thickness of the brake pads can be actively monitored, the additional installation of optical sensors is expensive, the sensors may also make misjudgments, and have an adverse effect on the spatial layout of the wheel hub. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the present application provides a device for monitoring the thickness of a brake pad, which is used to solve at least one defect in the prior art.

[0004] To achieve the above objectives and other objectives, the present application provides a friction pad, the friction pad comprising:

[0005] A first wear warning surface is formed in the friction pad at a first depth, and a plurality of first wear warning lines are arranged along at least one direction on the first wear warning surface. The plurality of first wear warning lines are connected in sequence and form a first current path when current is connected. The first depth is the distance from the contact surface to the first wear warning surface, and the contact surface is the surface on the friction pad that contacts the brake disc during braking, and the contact surface and the first wear warning surface are parallel to each other.

[0006] In one embodiment of the present invention, the friction pad further comprises:

[0007] A second wear warning surface is formed in the friction pad at a second depth, and a plurality of second wear warning lines are arranged along at least one direction on the second wear warning surface. The plurality of second wear warning lines are connected in sequence and form a second current path when current is connected; the second depth is the distance from the contact surface to the second wear warning surface, the second depth is greater than the first depth, and the first wear warning surface and the second wear warning surface are parallel to each other.

[0008] In an embodiment of the present invention, the first wear warning line and the second wear warning line are resistance wires.

[0009] In an embodiment of the present invention, the plurality of first wear warning lines are reciprocated along the length direction of the friction pad and are arranged in sequence along the height direction of the friction pad.

[0010] In an embodiment of the present invention, the plurality of second wear warning lines are reciprocated along the length direction of the friction pad and are arranged in sequence along the height direction of the friction pad.

[0011] To achieve the above objectives and other objectives, the present application provides a friction pad thickness monitoring device, the monitoring device comprising:

[0012] The friction lining;

[0013] a brake controller, electrically connected to the first wear warning line and the second wear warning line, respectively, and generating first pad wear state information according to the current flowing through the first wear warning line and generating second pad wear state information according to the current flowing through the second wear warning line;

[0014] The prompt module is connected to the brake controller and is used to receive and display the first pad wear status information and / or the second pad wear status information.

[0015] In one embodiment of the present invention, the monitoring device further includes:

[0016] The vehicle-mounted communication module is communicatively connected to the brake controller, and is used for receiving the first pad wear status information and the second pad wear status information sent by the brake controller, and sending the first pad wear status information and the second pad wear status information to a third-party monitoring system.

[0017] In one embodiment of the utility model, the prompt module is connected to the brake controller via a CAN bus or Ethernet; the third-party monitoring system is connected to the brake controller via a CAN bus or Ethernet.

[0018] To achieve the above and other purposes, the present application provides a brake, comprising:

[0019] Brake discs;

[0020] And a first brake pad and a second brake pad are respectively located on both sides of the brake disc, the inner sides of the first brake pad and the second brake pad are both coated with the friction lining, and when the first brake pad and the second brake pad are pressed against the brake disc under the drive of the brake drive device, the friction lining contacts the brake disc.

[0021] To achieve the above objectives and other objectives, the present application provides a vehicle including the brake.

[0022] Beneficial effects of this application:

[0023] A friction pad of the present application comprises: a first wear warning surface formed in the friction pad with a first depth, a plurality of first wear warning lines arranged along at least one direction are arranged on the first wear warning surface, the plurality of first wear warning lines are connected in sequence, and form a first current path when current is connected; the first depth is the distance from the contact surface to the first wear warning surface, the contact surface is the surface on the friction pad that contacts the brake disc during braking, and the contact surface is parallel to the first wear warning surface; in the present application, a wear warning line is arranged in the friction pad, and the wear state is fed back by the current size of the wear warning line. At the same time, the wear warning line is folded back and forth in the height direction and the length direction of the friction lining so that the wear warning line is evenly distributed in the entire wear warning surface, thereby preventing misjudgment caused by uneven wear of the friction lining.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 A schematic diagram of a friction pad according to an embodiment of the present application;

[0027] Figure 2 FIG. 1 is a schematic diagram of a friction pad thickness monitoring device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0030] Although the terms "first", "second", "A", "B", etc. may be used herein to describe various elements, these elements should not be limited by these terms and are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the following technology. The term "and / or" includes a combination of multiple related items or any item in the multiple related items.

[0031] As used herein, unless the context indicates otherwise, the singular form is intended to include the plural form, and it will be understood that the term "comprising" means the presence of stated features, quantities, steps, operations, elements, or combinations thereof, but does not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, components, or combinations thereof.

[0032] Before the detailed description, it is intended to clarify that the division of components in this specification is divided only by the main function of each component. That is, two or more components to be described below can be combined into one component, or can be divided into two or more components according to more detailed functions. In addition to the main function of the component, each component to be described below can also perform some or all of the functions of other components, and some of the main functions of each component can be exclusively performed by other components.

[0033] See also Figure 1 , Figure 1 A friction pad according to an embodiment of the present application includes:

[0034] A first wear warning surface 5 is formed in the friction pad 1 with a first depth, and a plurality of first wear warning lines 7 are arranged along at least one direction on the first wear warning surface 5. The plurality of first wear warning lines 7 are connected in sequence and form a first current path when current is connected. The first depth is the distance from the contact surface to the first wear warning surface 5, and the contact surface is the surface on the friction pad 1 that contacts the brake disc during braking, and the contact surface and the first wear warning surface 5 are parallel to each other.

[0035] In the present application, a wear warning line is set in the friction pad, and the wear status is fed back by the current size of the wear warning line. At the same time, the wear warning line is reciprocated in the height direction and the length direction of the friction pad, so that the wear warning line is evenly distributed in the entire wear warning surface, thereby preventing the misjudgment caused by uneven wear of the friction pad.

[0036] In an embodiment of the present application, the friction pad 1 also includes: a second wear warning surface 6 formed in the friction pad 1 with a second depth, and a plurality of second wear warning lines 2 are arranged along at least one direction on the second wear warning surface 6, and the plurality of second wear warning lines 2 are connected in sequence and form a second current path when the current is connected; the second depth is the distance from the contact surface to the second wear warning surface 6, the second depth is greater than the first depth, and the first wear warning surface 5 and the second wear warning surface 6 are parallel to each other.

[0037] In the embodiment of the present application, the first wear warning line 7 and the second wear warning line 2 are resistance wires.

[0038] In the embodiment of the present application, two layers of resistance wires, namely the first wear warning wire and the second wear warning wire, are pre-buried at a certain depth in the friction pad, and both ends of each layer of resistance wire extend out of the friction pad to form an input terminal 3 and an output terminal 4. When the wear degree of the friction pad is monitored by the brake controller, the first wear warning wire and the second wear warning wire are connected outside the friction pad to form a parallel relationship and merge into a connector, and then connected to the brake controller through the vehicle wiring harness.

[0039] The embedded depth of the resistance wire is recommended based on the experience of traditional friction pad detection. The recommended embedded depth of the first wear warning line is 2.5-3.5mm. The wear of the resistance wire at this point can provide users with an early warning that the friction pad needs to be replaced. The embedded depth of the first wear warning line is 4.5-5.5mm. The wear of the resistance wire at this point needs to warn users that the friction pad must be replaced. There is still about 2mm of thickness between the first wear warning line and the second wear warning line. The wear time of this thickness is enough for users to arrange the replacement time in advance.

[0040] See also Figure 1 , multiple first wear warning lines 7 are folded back and forth along the length of the friction lining 1, and are arranged in sequence along the height direction of the friction lining 1; multiple second wear warning lines 2 are folded back and forth along the length of the friction lining 1, and are arranged in sequence along the height direction of the friction lining 1. It can be understood that by distributing the wear warning lines in the above distribution mode, the wear warning lines cover the wear surface of the entire friction lining as much as possible, which can prevent misjudgment caused by uneven wear.

[0041] Of course, the wear line is not Figure 1In addition to forming a broken line in the distribution manner, the wear warning line can also be distributed in a curve or other ways. As long as other distribution ways that can cover as much as possible the wear surface of the friction pad are within the protection scope of this application, they will not be elaborated here.

[0042] Please refer to Figure 2 , in an embodiment of this application, a monitoring device for the thickness of a friction pad is further provided. The monitoring device includes:

[0043] A friction pad, where the friction pad adopts the friction pad as described above Figure 1 shown;

[0044] A brake controller, electrically connected to the first wear warning line and the second wear warning line respectively, generating first pad wear state information according to the current flowing through the first wear warning line and generating second pad wear state information according to the current flowing through the second wear warning line;

[0045] A prompt module, connected to the brake controller, for receiving and displaying the first pad wear state information or / and the second pad wear state information.

[0046] When monitoring the thickness of the friction pad, the brake controller uses the current vehicle voltage or the voltage output to the friction pad set by the controller as a reference. When both layers of resistance wires are intact, a normal current I0 can be obtained. At this time, the brake controller should output a pad wear state signal S0 to the bus, and this pad wear state S0 can represent the wear state of the friction pad. When the friction pad wears to a certain extent and the first layer of resistance wire is worn, it will cause an increase in the resistance in the circuit, and then the current flowing through the first layer of resistance wire will decrease, generating a current I1, and I1 < I0. At this time, the brake controller should output a first warning signal S1 to the bus, and this first warning signal represents the first pad wear state of the friction pad to remind the user that the friction pad needs to be replaced; when the friction pad wears further and the second layer of resistance wire is open-circuited, resulting in a non-conductive circuit, a current I2 is obtained at this time, and I2 = 0A. The second pad wear state of the friction pad is represented by this current I2. At this time, the brake controller determines that the friction pad has worn to the extent that the braking performance cannot be guaranteed, and outputs a pad wear state signal S2 indicating that the friction pad has been completely worn to the bus to remind the user that the friction pad must be replaced immediately.

[0047] It should be noted that the monitoring of the friction pads of the entire vehicle can include 8 friction pads, with two friction pads for each wheel. When the prompt module receives the pad wear status signal S0 sent by the brake controller, it should not display any abnormal information; when the received pad wear status signal is S1, the prompt module should prompt the user that there is a need to replace the friction pads, and mark the position of the friction pads that need to be replaced. It is understandable that the prompt module can display the prompt information in the form of a pop-up window. After the pop-up window disappears, it needs to be displayed for a long time in the form of an identifier with a yellow background at a specific position of the prompt module until the status signal changes from S1 to S0 due to the replacement of the friction pad.

[0048] It should be noted that the brake controller is powered by the vehicle power supply. In the embodiment of the present application, the brake controller is connected to VCC for power supply. The circuit connected to the friction pad is also connected to the ground terminal of the negative electrode of the brake pad.

[0049] In the embodiment of the present application, the brake controller supports current detection of 8 friction pads and supports communication protocols such as CAN bus or Ethernet. Each detection circuit has a current magnitude detection port, and its current detection port can be an output port or an input port. Through the port connected to the abnormal current loop, the brake controller can determine the wear state and location information of the abnormal friction pad.

[0050] When the received pad wear status signal is S2, a pop-up window should be used to remind the user that the friction pad must be replaced immediately to ensure the safety of the braking system, and the position of the friction pad that needs to be replaced should be marked. After the pop-up window disappears, it is necessary to display the pad wear status signal from S2 to S0 in the form of an identifier with a red background at a specific position of the prompt module for a long time until the pad wear status signal changes from S2 to S0 due to the replacement of the friction pad.

[0051] It should be noted that the prompt module table can be any device that can provide vehicle information display, such as a multimedia display, a HUD display, etc.

[0052] It should be noted that the brake controller may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0053] In an embodiment of the present application, the monitoring device further includes:

[0054] The vehicle-mounted communication module is connected to the brake controller for receiving the first pad wear status information and the second pad wear status information sent by the brake controller, and sending the first pad wear status information and the second pad wear status information to a third-party monitoring system.

[0055] When the vehicle-mounted communication module receives the pad wear status signal S0 sent by the brake controller, it can transmit the information that the pad wear status is normal to the third-party monitoring system, that is, the OEM after-sales system.

[0056] When the received pad wear status signal is S1, a risk warning of the user vehicle's brake system should be transmitted to the OEM's after-sales system.

[0057] When the received pad wear status signal is S2, a risk warning of the user vehicle's brake system should be transmitted to the OEM's after-sales system.

[0058] When the OEM after-sales system receives the normal friction pad status information from the vehicle communication module, it should not communicate the brake system status with the user in any way to avoid user tension.

[0059] When receiving a brake system risk pre-warning (a pop-up window reminding you that the brake pads need to be replaced and marking the brake pads position; after the pop-up window disappears, the warning information needs to be displayed in yellow for a long time) or a brake system risk warning (a pop-up window reminding you that the brake pads must be replaced immediately and marking the brake pads position; after the pop-up window disappears, the warning information needs to be displayed in red for a long time) transmitted by the on-board communication module, you should proactively communicate with the user, explain the source of the risk, and provide technical support.

[0060] It should be noted that the vehicle-mounted communication module may be a TBOX.

[0061] In an embodiment of the present application, the prompt module is connected to the brake controller via a CAN bus or Ethernet; the third-party monitoring system is connected to the brake controller via a CAN bus or Ethernet.

[0062] This application covers the entire process from friction pad wear detection to after-sales technical support: from the brake controller determining friction pad wear, to proactively reminding the user that the brake pad needs to be replaced, to submitting to after-sales, and proactively providing technical support to users through after-sales.

[0063] In an embodiment of the present application, a brake is further provided, the brake comprising:

[0064] Brake discs;

[0065] And the first brake pad and the second brake pad are respectively located on both sides of the brake disc, and the inner sides of the first brake pad and the second brake pad are both provided with friction linings, and when the first brake pad and the second brake pad are pressed against the brake disc under the driving of the brake driving device, the friction linings contact the brake disc. Among them, the friction linings are as described above. Figure 1 Friction lining shown.

[0066] In an embodiment of the present application, a vehicle is also provided, comprising the brake of the aforementioned embodiment.

[0067] It can be understood by those skilled in the art that the relevant modules involved in the present invention and the functions they implement can be implemented by carrying conventional computer software programs or relevant protocols in the prior art on the improved hardware and the devices, components or systems it constitutes, and it is not an improvement on the computer software programs or relevant protocols in the prior art. For example, the improved computer hardware system can still implement the specific functions of the hardware system by loading the existing software operating system. Therefore, it can be understood that the innovation of the present invention lies in the connection and combination relationship of the hardware modules / units in the prior art, rather than just the improvement of the specific structure of the hardware modules / units and the software or protocols installed in the hardware modules to realize the relevant functions.

[0068] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A friction lining, characterized in that: The friction lining comprises: A first wear warning surface is formed in the friction lining at a first depth, and a plurality of first wear warning lines are arranged along at least one direction on the first wear warning surface. The plurality of first wear warning lines are connected in sequence and form a first current path when current is connected. The first depth is the distance from the contact surface to the first wear warning surface, and the contact surface is the surface on the friction lining that contacts the brake disc during braking, and the contact surface and the first wear warning surface are parallel to each other.

2. The friction lining according to claim 1, characterized in that The friction lining also includes: A second wear warning surface is formed in the friction lining with a second depth, and a plurality of second wear warning lines are arranged along at least one direction on the second wear warning surface. The plurality of second wear warning lines are connected in sequence and form a second current path when current is connected; the second depth is the distance from the contact surface to the second wear warning surface, the second depth is greater than the first depth, and the first wear warning surface and the second wear warning surface are parallel to each other.

3. The friction lining according to claim 2, characterized in that The first wear warning line and the second wear warning line are resistance wires.

4. The friction lining according to claim 1, characterized in that The plurality of first wear warning lines are reciprocated along the length direction of the friction lining and are arranged in sequence along the height direction of the friction lining.

5. The friction lining according to claim 2, characterized in that The plurality of second wear warning lines are reciprocated along the length direction of the friction lining and are arranged in sequence along the height direction of the friction lining.

6. A friction lining thickness monitoring device, characterized in that: The monitoring device comprises: The friction lining according to claim 5; a brake controller, electrically connected to the first wear warning line and the second wear warning line, respectively, and generating first pad wear state information according to the current flowing through the first wear warning line and generating second pad wear state information according to the current flowing through the second wear warning line; The prompt module is connected to the brake controller and is used to receive and display the first pad wear status information and / or the second pad wear status information.

7. The friction lining thickness monitoring device according to claim 6, characterized in that: The monitoring device also includes: The vehicle-mounted communication module is communicatively connected to the brake controller, and is used for receiving the first pad wear status information and the second pad wear status information sent by the brake controller, and sending the first pad wear status information and the second pad wear status information to a third-party monitoring system.

8. The friction lining thickness monitoring device according to claim 7, characterized in that: The prompt module is connected to the brake controller via a CAN bus or Ethernet; the third-party monitoring system is connected to the brake controller via a CAN bus or Ethernet.

9. A brake, characterized in that: The brake comprises: Brake discs; And a first brake pad and a second brake pad are respectively located on both sides of the brake disc, the inner sides of the first brake pad and the second brake pad are coated with the friction lining as described in any one of claims 1 to 5, and when the first brake pad and the second brake pad are pressed against the brake disc under the drive of a brake drive device, the friction lining is in contact with the brake disc.

10. A vehicle, characterized in that: Comprising a brake as claimed in claim 9.

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