Electric control braking system

Abstract

The utility model provides an electric control braking system. A testing device is used for detecting the clamping force of a brake disc clamped by a brake pad. The testing device comprises a detection rod which is fixedly installed on the brake pad, and the axial direction of the detection rod is consistent with the moving direction of the brake pad; the detector is installed on the inner wall of a shell of the EBS braking system, the detector is provided with a pressure detection part, and the position of the pressure detection part corresponds to that of the detection rod; through the detection rod installed on the brake block, the brake block drives the detection rod to move, the clamping force of the EBS braking system is tested by detecting the thrust of the detection rod, the detection cost can be effectively reduced, and when the cross-shaped detection rod is stressed, the deformation of the detection rod is more local, namely, the detection rod is mainly concentrated on a rod piece parallel to the bending force direction, so that the clamping force of the EBS braking system is greatly reduced. Therefore, the overall bending resistance is improved, and the detection precision is improved.

Description

Technical Field

[0001] This application relates to the technical field of vehicle EBS braking system testing devices, and particularly to an electronically controlled braking system. Background Art

[0002] The clamping force test of the EMB braking system is an important measure to ensure braking performance, improve safety and reliability, adapt to different driving modes and road conditions, and meet regulatory and standard requirements. By regularly testing and optimizing the clamping force, the performance and application value of the EMB system can be further improved. However, usually multiple force sensors need to be set up to detect the clamping force, resulting in increased costs. Summary of the Utility Model

[0003] The purpose of this utility model is to solve the above problems and provide an electronically controlled braking system.

[0004] The technical solution of this application is implemented as follows:

[0005] In a first aspect, this application provides an electronically controlled braking system, and the braking system includes a clamping force test device for detecting the clamping force of the brake pads clamping the brake disc.

[0006] The test device includes:

[0007] A detection rod fixedly installed on the brake pads, and the axial direction of the detection rod is consistent with the moving direction of the brake pads;

[0008] A detector installed on the inner wall of the housing of the EBS braking system, and the detector has a pressure detection part, and the position of the pressure detection part corresponds to that of the detection rod;

[0009] In the standby state of the EBS braking system, the distance between the first end of the detection rod and the pressure detection part is X1;

[0010] The distance between the brake pads and the brake disc is X2, where X1 = X2;

[0011] When the EBS braking system is in a braking state, the brake pads contact the brake disc, and the detection rod contacts the pressure detection part;

[0012] The Rockwell hardness range of the detection rod (111) is between 55 and 65.

[0013] The advantages or beneficial effects in the above technical solutions at least include:

[0014] By means of the detection rod installed on the brake pad, the brake pad drives the detection rod to move, and the clamping force of the EBS braking system is tested by detecting the thrust of the detection rod, which can effectively reduce the detection cost. Moreover, when the "cross-shaped" detection rod is stressed, its deformation is often more localized, that is, mainly concentrated on the rod parallel to the direction of the bending force, which helps to improve the overall bending resistance performance and increases the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings illustrate exemplary embodiments of the present application of the embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present application. These drawings are included to provide a further understanding of the present application and are included in this specification and form a part of this specification.

[0016] Figure 1 Shows a schematic position diagram of the test device of the embodiment of the present invention;

[0017] Figure 2 Shows a schematic position diagram of the detection rod of the embodiment of the present invention;

[0018] Figure 3 Shows a schematic position diagram of the detection rod and the guide plate of the embodiment of the present invention;

[0019] Figure 4 Shows a schematic connection diagram of the central processing unit and each sensor of the embodiment of the present invention;

[0020] Reference numerals: 10, EBS braking system; 11, brake pad; 111, detection rod; 112, temperature sensor; 12, brake disc; 13, guide plate; 20, detector; 21, pressure detection part; 30, central processing unit; 40, brake disc rotation speed sensor; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The embodiments of the present application will be described in more detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not used to limit the protection scope of the present application.

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] It should be understood that the term "including" and its variations used herein are open-ended, that is, "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0024] It should be noted that the modification of "one" and "a plurality of" mentioned in this application is illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0025] The names of the messages or information exchanged between multiple devices in the embodiments of this application are only for illustrative purposes and are not used to limit the scope of these messages or information.

[0026] Referring to Figure 1 and Figure 2 , a clamping force testing device for an EBS braking system 10, the braking system includes the clamping force testing device, and the testing device is used to detect the clamping force of the brake pads 11 clamping the brake disc 12;

[0027] The testing device includes:

[0028] A detection rod 111, fixedly installed on the brake pad 11, and the axial direction of the detection rod 111 is consistent with the moving direction of the brake pad 11. When the EBS braking system 10 is started, the brake pad 11 moves and drives the detection rod 111 to move; a detector 20, installed on the inner wall of the housing of the EBS braking system 10, the detector 20 has a pressure detection part 21, and the pressure detection part 21 corresponds to the position of the detection rod 111. When the EBS braking system 10 is started, the brake pad 11 moves and drives the detection rod 111 to move, so that the end of the detection rod 111 touches the pressure detection part 21 and applies pressure;

[0029] Based on the above, when the EBS braking system 10 is in the standby state, the distance between the first end of the detection rod 111 and the pressure detection part 21 is X1; the distance between the brake pad 11 and the brake disc 12 is X2, where X1 = X2; to ensure that when the brake pad 11 contacts the brake disc 12, the detection rod 111 will touch the pressure detection part 21, ensuring the accuracy of pressure detection. Thus, when the EBS braking system 10 is in the braking state, the brake pad 11 contacts the brake disc 12, the detection rod 111 contacts the pressure detection part 21, and the clamping force of the brake pad 11 is detected by the pressure exerted by the detection rod 111 on the pressure detection part 21;

[0030] Furthermore, the test device further includes:

[0031] A central processing unit 30, configured to collect the pressure value feedback by the detector 20 and the information of the rotational speed of the brake disc 12 feedback by the brake disc rotational speed sensor 40, and perform processing; a prompting system, electrically connected to the central processing unit 30; when the central processing unit 30 detects that the rotational speed of the brake disc 12 does not decrease within a predetermined time T after the braking system enters the braking state, it sends a signal to the prompting system, and the prompting system issues a fault prompt according to the signal to determine whether the clamping effect of the EBS braking system 10 meets the qualified standard, and the above-mentioned predetermined time T < 0.3S;

[0032] Based on the above, the test device further includes that the end of the detection rod 111 away from the detector 20 is embedded in the brake pad 11, and a temperature sensor 112 is installed on the part of the detection rod 111 extending into the brake pad 11, and the temperature sensor 112 is used to detect the temperature of the brake pad 11; the above-mentioned central processing unit 30 is further configured to collect the temperature data transmitted back by the temperature sensor 112 and perform processing. At the same time, the detector 20 is installed at the bottom of the detection rod 111, and the detection probe of the detector 20 contacts the inner wall of the brake pad 11, and its direction is towards the middle of the brake pad 11 to ensure the accuracy of temperature detection.

[0033] Based on the above structure, the cross-section of the detection rod 111 is in a "cross" shape, and this shape has extremely high bending stiffness in the direction perpendicular to the detection rod 111. Because when subjected to a bending force, the main deformation will be concentrated on the rod parallel to the direction of the bending force, while the rod perpendicular to the direction of the bending force can provide strong support and limit the development of deformation. In addition, when the "cross" shaped rod is stressed, its deformation is often more localized, that is, mainly concentrated on the rod parallel to the direction of the bending force, which helps to improve the overall bending resistance performance. Moreover, a guiding plate 13 is installed on the inner wall of the housing of the EBS braking system 10, and the detection rod 111 is movably connected to the guiding plate 13, further guiding the moving direction of the detection rod 111. At the same time, during the process of the detection rod 111 applying force to the pressure detection part 21, the detection rod 111 can be further kept in a vertical state to further avoid bending.

[0034] Preferably, the Rockwell hardness of the detection rod 111 ranges between 55 and 65, which can maintain the length of the detection rod 111 during multiple tests, avoid its shrinkage, and at the same time reduce the test error caused by the deformation of the material of the detection rod 111.

[0035] The test method of the present utility model includes the following steps. The test method uses the clamping force test device of the EBS braking system 10 as described above, and the judgment method includes the following steps:

[0036] S1. Let the thrust of the detection rod 111 be F; let the rotational speed of the brake disc 12 be V;

[0037] S2. After starting the braking system, the brake pad 11 approaches the brake disc 12;

[0038] S3. Detect whether V decreases within a predetermined time T after the braking system enters the working state. If yes, go to step S4; otherwise, go to step S6;

[0039] S4. The temperature sensor 112 detects whether a preset temperature difference is formed by the brake pad 11 within the time T. The preset temperature difference is 50 degrees Celsius. If yes, go to step S5; otherwise, go to step S6. The judgment of the temperature is to avoid the situation where the rotational speed of the brake disc 12 decreases during the test not due to the friction between the brake pad 11 and the brake disc 12. Such a situation will lead to an increase in the error of the target clamping force;

[0040] S5. At this time, the detector 20 starts to operate, reads the pressure F of the pressure detection part 21, and determines that the target clamping force is F1, where F1 = F;

[0041] S6. The brake pads 11 of the braking system are further close to the brake disc 12, and it is detected again whether V decreases within a predetermined time T1. If so, return to step S5; otherwise, send a signal to the prompting system, and the prompting system gives a fault prompt according to the signal, so as to facilitate the user to judge whether there is a fault in the braking system.

[0042] The above method is only a kind of information disclosure for facilitating auxiliary understanding, and is a method generated based on existing data comparison, rather than an improvement on the existing method.

[0043] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0044] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present application, rather than limiting the scope of the present application. For those skilled in the art, other changes or modifications can be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present application.

Claims

1. An electric braking system, characterized in that: The braking system includes a clamping force testing device, The testing device is used to detect the clamping force of the brake pad (11) clamping the brake disc (12); The testing device includes: A detection rod (111), fixedly installed on the brake pad (11), and the axial direction of the detection rod (111) is consistent with the moving direction of the brake pad (11); A detector (20), installed on the inner wall of the housing of the EBS braking system (10), and the detector (20) has a pressure detection part (21), and the pressure detection part (21) corresponds to the position of the detection rod (111); In the standby state of the EBS braking system (10), the distance between the first end of the detection rod (111) and the pressure detection part (21) is X1; The distance between the brake pad (11) and the brake disc (12) is X2, where X1 = X2; When the EBS braking system (10) is in the braking state, the brake pad (11) contacts the brake disc (12), and the detection rod (111) contacts the pressure detection part (21); The Rockwell hardness of the detection rod (111) ranges between 55 and 65.

2. The electronically controlled braking system according to claim 1, wherein: The testing device further includes: A central processing unit (30), used to collect the pressure value feedback by the detector (20) and the information of the rotation speed of the brake disc (12) feedback by the brake disc (12) rotation speed sensor, and perform processing; A prompting system, electrically connected to the central processing unit (30); The central processing unit (30) is further used for: when it is detected that after the braking system enters the braking state, if the rotation speed of the brake disc (12) does not decrease within a predetermined time T, sending a signal to the prompting system, and the prompting system issues a fault prompt according to the signal; The predetermined time T < 0.3S.

3. The electro-hydraulic braking system according to claim 2, characterized in that: The end of the detection rod (111) away from the detector (20) is embedded in the brake pad (11); The testing device further includes a temperature sensor (112), and the temperature sensor (112) is installed on the part of the detection rod (111) extending into the brake pad (11), and the temperature sensor (112) is used to detect the temperature of the brake pad (11); The central processing unit (30) is further used for collecting the temperature data transmitted back by the temperature sensor (112) and performing processing.

4. The electric braking system according to claim 3, characterized in that: The cross section of the detection rod (111) is in a cross shape, and a guiding plate (13) is further installed on the inner wall of the housing of the EBS braking system (10), and the detection rod (111) penetrates through the guiding plate (13) and is movably connected to the guiding plate (13).

5. The electro-hydraulic braking system according to claim 4, characterized in that: The detector (20) is installed at the bottom of the detection rod (111), and the detection probe of the detector (20) contacts the inner wall of the brake pad (11).

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