Rigidity testing device and method for floating type hydraulic brake caliper

Abstract

The invention discloses a rigidity testing device and testing method for a floating type hydraulic brake caliper, and belongs to the technical field of rigidity testing, the floating type hydraulic brake caliper comprises a caliper body, and the rigidity testing device for the floating type hydraulic brake caliper comprises a mounting bracket configured to be connected with the caliper body, the clamp body can slide relative to the mounting bracket; the detection assembly comprises two displacement sensors, the two displacement sensors are both connected with the installation support, the two displacement sensors are arranged on the two opposite sides of the clamp body respectively and arranged in the sliding direction of the clamp body, and detection heads of the displacement sensors abut against the clamp body; and the transformer is configured to pressurize or depressurize the caliper body, so that the rigidity test accuracy of the caliper body of the floating type hydraulic brake caliper can be improved, and the complexity of test operation can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of stiffness testing, and in particular to a stiffness testing device and a testing method for a floating hydraulic brake caliper. Background Art

[0002] Hydraulic brake calipers play a vital role in the automobile braking system. Their main purpose is to convert the force applied by the driver through the brake pedal into mechanical force, and then slow down or stop the vehicle through the friction between the brake pads and the brake disc. Among them, floating hydraulic brake calipers are widely used in various types of vehicles due to their simple structure, low cost and strong applicability. The stiffness test of the hydraulic brake caliper can ensure its braking performance and guarantee the safety and reliability of the vehicle.

[0003] In the related art, since the floating hydraulic brake caliper floats or slides during the braking process, the stiffness test of the caliper body of the floating hydraulic brake caliper generally has the defects of low test accuracy and complex test operation. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a floating hydraulic brake caliper stiffness test device, which is conducive to improving the accuracy of the stiffness test of the caliper body of the floating hydraulic brake caliper and reducing the complexity of the test operation.

[0005] The invention also provides a testing method.

[0006] According to the first aspect of the present invention, the stiffness testing device of the floating hydraulic brake caliper comprises: a mounting bracket, which is configured to be connected to a caliper body, and the caliper body can slide relative to the mounting bracket; a detection component, which comprises two displacement sensors, and the two displacement sensors are both connected to the mounting bracket. The two displacement sensors are respectively arranged on two sides of the caliper body facing away from each other and arranged along the sliding direction of the caliper body, and the detection head of the displacement sensor is in contact with the caliper body; and a transformer, which is configured to increase or reduce the pressure on the caliper body.

[0007] The stiffness testing device of the floating hydraulic brake caliper according to the embodiment of the present invention has at least the following beneficial effects: the mounting bracket is constructed to be connected to the caliper body of the floating hydraulic brake caliper, and the user can connect the caliper body of the floating hydraulic brake caliper to be tested to the mounting bracket. Based on the braking characteristics of the floating hydraulic brake caliper, the caliper body of the floating hydraulic brake caliper can slide relative to the mounting bracket. The stiffness testing device of the floating hydraulic brake caliper also includes a detection component, which includes two displacement sensors. The two displacement sensors are both connected to the mounting bracket, and the two displacement sensors are respectively arranged on the two sides of the caliper body facing away from each other and arranged along the sliding direction of the caliper body, that is, the caliper body to be tested is placed between the two displacement sensors, and the detection head of the displacement sensor abuts against the caliper body. Under the sliding or deformation of the caliper body, the detection head of the displacement sensor moves accordingly. The transformer is constructed to increase or reduce the pressure on the caliper body. The stiffness testing device of the dynamic hydraulic brake caliper increases the pressure of the caliper body through the transformer, causing the caliper body to slip and deform. The stiffness testing device of the floating hydraulic brake caliper can obtain the sum of the absolute values ​​of the detection values ​​of the two displacement sensors as the first measurement value. After the transformer increases the pressure of the caliper body, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors is obtained as the second measurement value. The difference between the second measurement value and the first measurement value is the deformation of the caliper body. The corresponding data of the deformation of the caliper body and the internal pressure are obtained to realize the stiffness test of the caliper body. The stiffness testing device of the floating hydraulic brake caliper uses the method of opposite detection of two displacement sensors to eliminate the interference of the floating or slipping of the floating hydraulic brake caliper on the stiffness test, which is beneficial to improve the test accuracy of the stiffness testing device of the floating hydraulic brake caliper, and the test is simpler and more convenient, which is beneficial to reduce the complexity of the test operation.

[0008] According to some embodiments of the present invention, the mounting bracket includes a slide rail, and the slide rail is slidably connected to the clamp body.

[0009] The mounting bracket includes a slide rail, which is slidably connected to the caliper body. The slide rail and the caliper body abut against each other to limit the sliding direction of the caliper body, which is beneficial to improving the stability of the caliper body sliding, making the detection value of the displacement sensor more accurate, and is beneficial to improving the test accuracy of the stiffness testing device of the floating hydraulic brake caliper.

[0010] According to some embodiments of the present invention, the stiffness testing device of the floating hydraulic brake caliper further includes a pressure sensor and a shut-off valve, wherein the pressure sensor is used to detect the internal pressure of the caliper body, and the shut-off valve is configured to control the connection and disconnection between the transformer and the caliper body according to the internal pressure of the caliper body.

[0011] Specifically, the stiffness testing device of the floating hydraulic brake caliper also includes a pressure sensor and a stop valve. The pressure sensor is used to detect the internal pressure of the caliper body. The stop valve is configured to control the on-off connection between the transformer and the caliper body according to the internal pressure of the caliper body. By opening or closing the stop valve in conjunction with the reading of the pressure sensor, the internal pressure of the caliper body can be accurately controlled. The deformation of the caliper body obtained by the detection component can be used to obtain corresponding data of the deformation of the caliper body and the internal pressure, so that users can evaluate whether the tested floating hydraulic brake caliper meets the design requirements to ensure the braking performance and safety of the vehicle.

[0012] The testing method according to the second aspect of the present invention is applied to a stiffness testing device of a floating hydraulic brake caliper as described in any one of the first aspects, and the testing method comprises:

[0013] Connect the clamp body and the displacement sensor to the mounting bracket;

[0014] Control the transformer to increase the pressure on the clamp body and record the detection value of the displacement sensor;

[0015] The deformation of the caliper body is calculated according to the detected value, and corresponding data of the deformation and the internal pressure of the caliper body are obtained.

[0016] The testing method according to the embodiment of the present invention has at least the following beneficial effects: the testing method connects the caliper body of the floating hydraulic brake caliper to be tested to the mounting bracket. Based on the braking characteristics of the floating hydraulic brake caliper, the caliper body of the floating hydraulic brake caliper can slide relative to the mounting bracket. The transformer is connected to the caliper body, and the internal pressure of the caliper body is increased or decreased through the transformer effect. The testing method connects two displacement sensors to the mounting bracket, so that the two displacement sensors are respectively arranged on the two sides of the caliper body facing away from each other and arranged along the sliding direction of the caliper body, that is, the caliper body to be tested is placed between the two displacement sensors, and the detection head of the displacement sensor is in contact with the caliper body. Under the sliding or deformation of the caliper body, the detection head of the displacement sensor As it moves, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors is obtained as the first measurement value. This test method can control the transformer to increase the pressure on the caliper body, causing the caliper body to slip and deform, and then obtain the sum of the absolute values ​​of the detection values ​​of the two displacement sensors as the second measurement value. The difference between the second measurement value and the first measurement value is the deformation of the caliper body, so as to obtain the corresponding data of the deformation of the caliper body and the internal pressure, so as to realize the stiffness test of the caliper body. This test method uses the method of opposite detection by two displacement sensors to eliminate the interference of the floating or slipping of the floating hydraulic brake caliper on the stiffness test, which is beneficial to improve the test accuracy of the test method, and the test is simpler and more convenient, which is beneficial to reduce the complexity of the test operation.

[0017] According to some embodiments of the present invention, calculating the deformation of the clamp body according to the detection value includes:

[0018] Acquire first detection values ​​of two displacement sensors, and add absolute values ​​of the two first detection values ​​as a first measurement value;

[0019] After the control transformer increases the pressure on the clamp body, the second detection values ​​of the two displacement sensors are obtained, and the absolute values ​​of the two second detection values ​​are added together as the second measurement value;

[0020] The difference between the second measured value and the first measured value is calculated as the deformation amount.

[0021] When calculating the deformation of the caliper body according to the detection value, the test method adds the absolute values ​​of the two first detection values ​​as the first measurement value. After the control transformer increases the pressure on the caliper body, the sum of the absolute values ​​of the second detection values ​​of the two displacement sensors is obtained as the second measurement value. The difference between the second measurement value and the first measurement value before the pressure increase is the deformation of the caliper body, so as to obtain the corresponding data of the deformation of the caliper body and the internal pressure, so as to realize the stiffness test of the caliper body. The test method eliminates the interference of the slip amount of the floating hydraulic brake caliper on the stiffness test by the way of opposite detection of two displacement sensors, which is beneficial to improve the test accuracy of the stiffness test device of the floating hydraulic brake caliper, and the test is simpler and more convenient, which is beneficial to reduce the complexity of the test operation.

[0022] According to some embodiments of the present invention, controlling a transformer to increase voltage on a clamp body includes:

[0023] Controlling the transformer to increase the pressure of the clamp body at a first pressure increasing speed, so that the clamp body is increased in pressure to a first pressure value, and after the pressure value is maintained at the first pressure value for a first preset time, the displacement sensor is adjusted to zero;

[0024] The control transformer increases the pressure of the clamp body at a second pressurization speed, increases the pressure of the clamp body to a second pressure value, and maintains the second pressure value for a second preset time, then relieves the pressure of the clamp body, the second pressurization speed is greater than the first pressurization speed, the second pressure value is greater than the first pressure value, and the second preset time is less than the first preset time.

[0025] Specifically, when controlling the transformer to pressurize the caliper body, the test method can first control the transformer to pressurize the caliper body at a first pressurization speed, so that the caliper body is pressurized to a first pressure value and maintained at the first preset time, thereby simulating a working scenario in which the floating hydraulic brake caliper has been installed on a vehicle, rather than in an initial installation or factory state, zeroing the displacement sensor, and then controlling the transformer to pressurize the caliper body at a second pressurization speed, so that the caliper body is pressurized to a second pressure value and maintained at the second pressure value for a second preset time, and depressurizing the caliper body, wherein the second pressurization speed is greater than the first pressurization speed, the second pressure value is greater than the first pressure value, and the second preset time is less than the first preset time, thereby simulating the working process of the floating hydraulic brake caliper when the driver steps on the accelerator pedal, and after the transformer pressurizes again, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors is the deformation of the caliper body after pressurization, so that the user can intuitively observe or record the corresponding data of the deformation of the caliper body and the internal pressure, thereby evaluating the stiffness of the floating hydraulic brake caliper to ensure the braking performance and safety of the vehicle.

[0026] According to some embodiments of the present invention, controlling the transformer to pressurize the clamp body at a first pressurization speed, pressurizing the clamp body to a first pressure value, and maintaining the first pressure value for a first preset time, and then zeroing the displacement sensor includes:

[0027] The control transformer increases the pressure of the clamp body at a pressurizing speed of 1 MPa / s, so that the pressure of the clamp body is increased to 2 MPa, and after maintaining at 2 MPa for 60 seconds, the displacement sensor is adjusted to zero.

[0028] Specifically, the test method controls the transformer to pressurize the caliper body at a first pressurizing speed of 1 MPa / s, so that the caliper body is pressurized to a first pressure value of 2 MPa, and maintained at 2 MPa for 60 seconds, and then the displacement sensor is zeroed. The test method controls the first pressurizing speed, the first pressure value and the first preset time to accurately simulate the working scenario in which the floating hydraulic brake caliper has been assembled on the vehicle, rather than the initial installation or factory state, so that the two brake pads of the caliper body are in a braking state after slipping. After zeroing the displacement sensor, the transformer pressurizes the caliper body again, and the sum of the absolute values ​​of the detection values ​​of the two displacement sensors is the deformation of the caliper body after pressurization, so that the user can intuitively observe or record the corresponding data of the deformation of the caliper body and the internal pressure, thereby evaluating the stiffness of the floating hydraulic brake caliper to ensure the braking performance and safety of the vehicle.

[0029] According to some embodiments of the present invention, controlling the transformer to pressurize the clamp body at a second pressurization speed, pressurizing the clamp body to a second pressure value, and maintaining the second pressure value for a second preset time, and then relieving the pressure of the clamp body, comprises:

[0030] The control transformer increases the pressure of the clamp body at a pressurizing speed of 4MPa / s, so that the pressure of the clamp body is increased to 16MPa, and after maintaining at 16MPa for 1s, the pressure of the clamp body is relieved.

[0031] Specifically, the test method controls the transformer to pressurize the caliper body at a second pressurization speed of 4MPa / s, so that the caliper body is pressurized to a second pressure value of 16MPa, and after maintaining it at 16MPa for 1s, the caliper body is depressurized, thereby simulating the working process of the floating hydraulic brake caliper when the driver steps on the accelerator pedal. At this time, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors is the deformation of the caliper body after pressurization, so that the user can intuitively observe or record the corresponding data of the deformation of the caliper body and the internal pressure, thereby evaluating the stiffness of the floating hydraulic brake caliper to ensure the braking performance and safety of the vehicle.

[0032] According to some embodiments of the present invention, the testing method further includes:

[0033] Construct a relationship curve between the sum of the absolute values ​​of the detection values ​​of the two displacement sensors and the internal pressure;

[0034] Output the relationship curve to the user.

[0035] Specifically, after the caliper body is pressurized to a first pressure value, the test method places the two brake pads of the caliper body in a braking state after slipping, maintains the pressure of the caliper body and performs zeroing on the displacement sensor. After the transformer pressurizes the caliper body, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors is the deformation of the caliper body. The test method constructs a relationship curve between the sum of the absolute values ​​of the detection values ​​of the two displacement sensors and the internal pressure of the caliper body, and outputs the relationship curve to the user, so that the user can intuitively observe the relationship between the deformation of the caliper body and the internal pressure, thereby making an accurate evaluation of the stiffness of the floating hydraulic brake caliper, which is beneficial to improving the accuracy of the test method for the stiffness test of the floating hydraulic brake caliper and ensuring the braking performance and safety of the vehicle.

[0036] According to some embodiments of the present invention, the floating hydraulic brake caliper further includes a piston slidably connected to the caliper body; the caliper body and the displacement sensor are both connected to the mounting bracket, including:

[0037] The moving direction of the detection head is controlled to be parallel or coaxial with the axis of the piston, and the detection head is abutted against the flat part of the pliers body.

[0038] Taking into account that the deformation of the caliper body is the largest at the piston and has a significant impact on the braking performance, when installing the displacement sensor, this test method can make the moving direction of the detection head of the displacement sensor parallel or coaxial with the axis of the piston, so as to detect the maximum deformation of the caliper body after pressurization, thereby improving the accuracy of the stiffness test of the caliper body, and the detection head of the displacement sensor is abutted against the flat part of the caliper body to ensure that the movement of the detection head is more stable and the fluctuation amplitude is small, thereby improving the accuracy of the stiffness test of the caliper body.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0041] Figure 1 It is a structural schematic diagram of a stiffness testing device for a floating hydraulic brake caliper according to an embodiment of the present invention;

[0042] Figure 2 A structural schematic diagram of a floating hydraulic brake caliper stiffness testing device according to an embodiment of the present invention performing displacement detection on a floating hydraulic brake caliper;

[0043] Figure 3 A flow chart of a testing method according to an embodiment of the present invention;

[0044] Figure 4 A flow chart of the arrangement of position sensors and transformer boosting of a test method according to an embodiment of the present invention;

[0045] Figure 5 A flow chart of a transformer voltage increase at a first voltage increase speed and a second voltage increase speed according to a testing method of an embodiment of the present invention;

[0046] Figure 6 A flow chart of calculating the deformation of a pliers body according to a test method of an embodiment of the present invention;

[0047] Figure 7 The flowchart is a flow chart of an output relationship curve of a test method according to an embodiment of the present invention.

[0048] Figure Number:

[0049] 100, clamp body;

[0050] 200, mounting bracket;

[0051] 300, displacement sensor;

[0052] 400, transformer;

[0053] 500, pressure sensor;

[0054] 610, first stop valve; 620, second stop valve;

[0055] 710, first pipeline; 720, second pipeline. DETAILED DESCRIPTION

[0056] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0057] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0058] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0059] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0060] The floating hydraulic brake caliper includes a caliper body 100, a brake pad and a piston slidingly connected to the caliper body 100. When the driver steps on the brake pedal, the auxiliary hydraulic pump pushes the piston to move, so that the inner brake pad first contacts the brake disc. As the brake fluid continues to be filled, the contact force between the inner brake pad and the brake disc continues to increase. The generated reaction force will pull the caliper body 100 to move along the guide pin, so that the outer brake pad also contacts the brake disc and is clamped. The floating braking method of the floating hydraulic brake caliper can ensure full contact between the brake pad and the brake disc, thereby improving the braking efficiency. However, it also hinders the stiffness test of the caliper body 100. Affected by the slippage or floating of the caliper body 100, traditional testing devices or testing methods are difficult to accurately measure the deformation of the caliper body 100, and the accuracy of the stiffness test of the caliper body 100 is low.

[0061] The stiffness characteristic of the floating hydraulic brake caliper is that the caliper body 100 deforms as the internal pressure increases. The stiffness test of the floating hydraulic brake caliper is of great significance for ensuring vehicle braking performance, improving vehicle safety, and supporting design and manufacturing improvements.

[0062] Traditional testing devices or testing methods for floating hydraulic brake calipers generally have the following defects:

[0063] (1) Insufficient measurement accuracy: Traditional testing devices or methods may not be able to accurately measure the stiffness of the clamp body 100, resulting in inaccurate data and affecting design and optimization.

[0064] (2) Complex measurement methods: Traditional testing devices or methods are too complicated, requiring a lot of time and human resources, and the testing process is cumbersome.

[0065] (3) Inability to monitor in real time: Traditional testing devices or methods are generally unable to monitor the changes in the stiffness of the clamp body 100 in real time, and can only provide static data, which cannot reflect the actual situation under dynamic conditions.

[0066] (4) High equipment cost: Traditional testing devices or methods are expensive, which increases project costs, especially in the R&D and testing stages.

[0067] (5) Difficulty in data analysis: The data generated by traditional testing devices or methods are not easy to analyze and interpret, which increases the workload of engineers.

[0068] In view of the above-mentioned defects, a floating hydraulic brake caliper stiffness testing device provided in an embodiment of the present invention is beneficial to improving the accuracy of the stiffness test of the caliper body 100 of the floating hydraulic brake caliper and reducing the complexity of the test operation.

[0069] Reference Figure 1 to Figure 2 As shown, a stiffness testing device for a floating hydraulic brake caliper according to an embodiment of the present invention includes: a mounting bracket 200 , a detection component and a transformer 400 .

[0070] Reference Figure 1 to Figure 2 As shown, the mounting bracket 200 is constructed to be connected to the caliper body 100. The user can connect the caliper body 100 of the floating hydraulic brake caliper to be tested to the mounting bracket 200. Based on the braking characteristics of the floating hydraulic brake caliper, the caliper body 100 of the floating hydraulic brake caliper can slide relative to the mounting bracket 200.

[0071] Reference Figure 1 to Figure 2As shown, the detection component includes two displacement sensors 300, both of which are connected to the mounting bracket 200, and the two displacement sensors 300 are respectively arranged on the two sides of the pliers body 100 facing away from each other and arranged along the sliding direction of the pliers body 100, and the detection head of the displacement sensor 300 abuts against the pliers body 100, that is, the pliers body 100 to be tested is placed between the two displacement sensors 300, and the detection head of the displacement sensor 300 abuts against the pliers body 100, and under the sliding or deformation of the pliers body 100, the detection head of the displacement sensor 300 moves accordingly.

[0072] Reference Figure 1 to Figure 2 As shown, the transformer 400 is configured to increase or reduce the pressure of the caliper body 100. The floating hydraulic brake caliper stiffness testing device increases the pressure of the caliper body 100 through the transformer 400, so that the caliper body 100 slips and deforms. The transformer 400 can be any type of pump body, which supplies oil to the caliper body 100 to increase the pressure of the caliper body 100.

[0073] Reference Figure 1 to Figure 2 As shown, the stiffness testing device of the floating hydraulic brake caliper can obtain the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 as the first measurement value. After the transformer 400 pressurizes the caliper body 100, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 is obtained as the second measurement value. The difference between the second measurement value and the first measurement value is the deformation of the caliper body 100, so as to obtain the corresponding data of the deformation of the caliper body 100 and the internal pressure, so as to realize the stiffness test of the caliper body 100. The stiffness testing device of the floating hydraulic brake caliper eliminates the interference of the slip amount of the floating hydraulic brake caliper on the stiffness test by the way of opposite detection of the two displacement sensors 300, which is beneficial to improve the test accuracy of the stiffness testing device of the floating hydraulic brake caliper, and the test is simpler and more convenient, which is beneficial to reduce the complexity of the test operation.

[0074] Reference Figure 1 to Figure 2 As shown, compared with the traditional testing device, the floating hydraulic brake caliper stiffness testing device provided by the embodiment of the present invention has the following advantages:

[0075] (1) Improving measurement accuracy: Through the improved test device, the influence caused by the slippage or floating of the caliper body 100 of the floating hydraulic brake caliper can be reduced or eliminated, providing more accurate stiffness data and ensuring the accuracy of design and optimization.

[0076] (2) Simplified measurement process: The stiffness testing device of the floating hydraulic brake caliper can detect the deformation of the caliper body 100 by only two displacement sensors 300, which can simplify the testing process, reduce the required time and human resources, and improve efficiency.

[0077] (3) Realize real-time monitoring: The stiffness testing device of the floating hydraulic brake caliper can obtain the deformation of the caliper body 100 in real time through the detection value of the displacement sensor 300, and can obtain the stiffness data of the caliper body 100 under dynamic working conditions, providing a more comprehensive performance evaluation.

[0078] (4) Reduce equipment cost: The stiffness testing device of the floating hydraulic brake caliper has a simple structure and low cost, which can reduce the overall project cost and improve economic benefits.

[0079] (5) Improved data analysis: The deformation obtained by the displacement sensor 300 is easier to analyze and interpret, which can reduce the workload of engineers and improve work efficiency.

[0080] Reference Figure 1 As shown, it can be understood that the mounting bracket 200 includes a slide rail, which is slidably connected to the caliper body 100. The slide rail and the caliper body 100 abut against each other to limit the sliding direction of the caliper body 100, which is beneficial to improve the sliding stability of the caliper body 100, making the detection value of the displacement sensor 300 more accurate, and is beneficial to improving the test accuracy of the stiffness testing device of the floating hydraulic brake caliper.

[0081] It is understandable that the stiffness testing device of the floating hydraulic brake caliper also includes a first pipeline 710, a second pipeline 720, a pressure sensor 500 and a stop valve, the stop valve includes a first stop valve 610 and a second stop valve 620, the transformer 400 is connected to the caliper body 100 through the first pipeline 710, the first pipeline 710 is connected to the second pipeline 720, the second pipeline 720 is connected to the pressure sensor 500, the first stop valve 610 is arranged at the first pipeline 710 to control the on-off of the first pipeline 710, the second stop valve 620 is arranged at the second pipeline 720, and the second stop valve 620 is used to control the on-off of the second pipeline 720.

[0082] The pressure sensor 500 is used to detect the internal pressure of the caliper body 100, and the stop valve is configured to control the connection and disconnection of the transformer 400 and the caliper body 100 according to the internal pressure of the caliper body 100. The stiffness testing device of the floating hydraulic brake caliper can accurately detect and control the internal pressure of the caliper body 100 by opening or closing the stop valve in conjunction with the reading of the pressure sensor 500, and obtain the deformation of the caliper body 100 obtained by the detection component, thereby obtaining the corresponding data of the deformation of the caliper body 100 and the internal pressure, so that the user can evaluate whether the tested floating hydraulic brake caliper meets the design requirements to ensure the braking performance and safety of the vehicle.

[0083] It is understandable that the displacement sensor 300 includes a pointer, a meter head and a detection head. The detection head and the meter head can slide relative to each other. The meter head is fixedly connected to the mounting bracket. When the detection head shrinks relative to the meter head, the detection head can drive the pointer to rotate, and the pointer points to the scale of the meter head to indicate the detection value of the position.

[0084] It should be noted that the structure of the displacement sensor 300 belongs to conventional technical means in the art and will not be described in detail here. The floating hydraulic brake caliper stiffness test device can use a displacement sensor 300 with a data recording function to automatically record the detection value to feedback the actual situation of the caliper body 100 under dynamic conditions.

[0085] The mounting bracket 200 includes a disc body, and the caliper body 100 includes two brake discs arranged inside and outside. The disc body is configured to be clamped by two brake pads of the caliper body 100. The setting of the disc body can simulate the brake disc in an actual vehicle to improve the accuracy of the stiffness test of the floating hydraulic brake caliper.

[0086] Reference Figures 3 to 7 As shown, a testing method according to an embodiment of the present invention is applied to the stiffness testing device of the floating hydraulic brake caliper shown in any of the above embodiments; the testing method comprises the following steps:

[0087] Step S100, connecting the clamp body and the displacement sensor to the mounting bracket;

[0088] Step S200, controlling the transformer 400 to increase the pressure of the clamp body 100, and recording the detection value of the displacement sensor 300;

[0089] Step S300 , calculating the deformation amount of the pliers body 100 according to the detection value, and obtaining corresponding data of the deformation amount and the internal pressure of the pliers body 100 .

[0090] Reference Figure 1 and Figure 3 As shown, in step S100, the test method connects the caliper body 100 of the floating hydraulic brake caliper to be tested to the mounting bracket 200. Based on the braking characteristics of the floating hydraulic brake caliper, the caliper body 100 of the floating hydraulic brake caliper can slide relative to the mounting bracket 200, and the transformer 400 is connected to the caliper body 100 to increase or decrease the internal pressure of the caliper body 100 through the transformer effect of the transformer 400.

[0091] Reference Figure 1 and Figure 3As shown, the test method connects two displacement sensors 300 to the mounting bracket 200, so that the two displacement sensors 300 are respectively arranged on the two sides of the caliper body 100 facing away from each other and arranged along the sliding direction of the caliper body 100, that is, the caliper body 100 to be tested is placed between the two displacement sensors 300, and the detection head of the displacement sensor 300 is in contact with the caliper body 100. Under the sliding or deformation of the caliper body 100, the detection head of the displacement sensor 300 moves accordingly.

[0092] Reference Figure 1 and Figure 3 As shown, in step S200, the transformer 400 can increase or decrease the pressure of the caliper body 100 to simulate the working process of the floating hydraulic brake caliper in an actual vehicle, and record the detection value of the displacement sensor 300 to calculate the deformation of the caliper body 100 according to the detection value.

[0093] Reference Figure 1 and Figure 3 As shown, in step S300, the test method obtains the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 as the first measurement value. The test method can control the transformer 400 to increase the pressure on the caliper body 100, so that the caliper body 100 slips and deforms, and obtains the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 as the second measurement value. The difference between the second measurement value and the first measurement value is the deformation of the caliper body 100, so as to obtain the corresponding data of the deformation of the caliper body 100 and the internal pressure, so as to realize the stiffness test of the caliper body 100. The test method eliminates the interference of the slippage of the floating hydraulic brake caliper on the stiffness test by the opposite detection of the two displacement sensors 300, which is beneficial to improve the test accuracy of the stiffness test device of the floating hydraulic brake caliper, and the test is simpler and more convenient, which is beneficial to reduce the complexity of the test operation.

[0094] Reference Figure 1 and Figure 3 As shown, compared with the traditional testing method, the testing method provided by the embodiment of the present invention has the following advantages:

[0095] (1) Improving measurement accuracy: Through the improved test method, the influence caused by the slippage or floating of the caliper body 100 of the floating hydraulic brake caliper can be reduced or eliminated, providing more accurate stiffness data and ensuring the accuracy of design and optimization.

[0096] (2) Simplifying the measurement process: This test method can detect the deformation of the pliers body 100 by using only two displacement sensors 300, which can simplify the test process, reduce the required time and human resources, and improve efficiency.

[0097] (3) Realize real-time monitoring: This test method can obtain the deformation of the caliper body 100 in real time through the detection value of the displacement sensor 300, and can obtain the stiffness data of the caliper body 100 under dynamic working conditions, providing a more comprehensive performance evaluation.

[0098] (4) Reduce equipment costs: This test method has a low cost, which can reduce the overall project cost and improve economic benefits.

[0099] (5) Improved data analysis: The deformation obtained by the displacement sensor 300 is easier to analyze and interpret, which can reduce the workload of engineers and improve work efficiency.

[0100] Reference Figure 1 and Figure 4 As shown, it can be understood that in step S100, the test method connects the caliper body 100 and the displacement sensor 300 to the mounting bracket 200, and includes the following steps:

[0101] Step S110 , controlling the moving direction of the detection head to be parallel or coaxial with the axis of the piston, and making the detection head of the displacement sensor 300 abut against the flat part of the caliper body 100 .

[0102] Reference Figure 1 and Figure 4 As shown, considering that the deformation of the caliper body 100 is the largest at the piston and has a significant impact on the braking performance, when installing the displacement sensor 300, the test method can make the moving direction of the displacement sensor 300 parallel or coaxial with the axis of the piston, so as to detect the maximum deformation of the caliper body 100 after pressurization, thereby improving the accuracy of the stiffness test of the caliper body 100, and the detection head of the displacement sensor 300 is abutted against the flat part of the caliper body 100 to avoid the uneven parts of the casting surface of the caliper body 100 to ensure that the movement of the detection head is more stable and the fluctuation amplitude is small, thereby improving the accuracy of the stiffness test of the caliper body 100.

[0103] It should be understood that in some other embodiments, if the floating hydraulic brake caliper has multiple pistons, connecting the caliper body 100 and the displacement sensor 300 to the mounting bracket 200 includes the following steps:

[0104] Step S120 , controlling the moving direction of the detection head to be parallel or coaxial with the symmetry line of the plurality of piston axes, and making the detection head abut against the flat part of the caliper body 100 .

[0105] Taking into account that the deformation of the caliper body 100 at the piston is the largest and has a significant impact on the braking performance, when installing the displacement sensor 300, the test method can make the moving direction of the displacement sensor 300 parallel or coaxial with the symmetry axis of multiple piston axes, so as to detect the maximum deformation of the caliper body 100 after pressurization, thereby improving the accuracy of the stiffness test of the caliper body 100, and the detection head of the displacement sensor 300 is abutted against the flat part of the caliper body 100 to ensure that the movement of the detection head is more stable and the fluctuation amplitude is small, thereby improving the accuracy of the stiffness test of the caliper body 100.

[0106] It should be understood that in some other embodiments, if the deformation of the floating hydraulic brake caliper at the piston axis is difficult to measure, the test method can control the detection head of the displacement sensor 300 to abut against other representative positions of the caliper body 100 and explain it in the test report.

[0107] Reference Figure 1 and Figure 4 As shown, it can be understood that, in this embodiment, the test method, in step S200, controls the transformer 400 to increase the pressure of the clamp body 100, including the following steps:

[0108] Step S210, controlling the transformer 400 to pressurize the clamp body 100 at a first pressurization speed, so that the clamp body 100 is pressurized to a first pressure value, and after maintaining the first pressure value for a first preset time, the displacement sensor 300 is adjusted to zero;

[0109] Step S220, controlling the transformer 400 to pressurize the clamp body 100 at a second pressurization speed, pressurizing the clamp body 100 to a second pressure value, and maintaining the second pressure value for a second preset time, then depressurizing the clamp body 100, the second pressurization speed is greater than the first pressurization speed, the second pressure value is greater than the first pressure value, and the second preset time is less than the first preset time.

[0110] Reference Figure 1 and Figure 4 As shown, specifically, when controlling the transformer 400 to pressurize the caliper body 100, the test method can first control the transformer 400 to pressurize the caliper body 100 at a first pressurization speed, so that the caliper body 100 is pressurized to a first pressure value, and maintained at the first pressure value after a first preset time, thereby simulating a working scenario in which the floating hydraulic brake caliper has been assembled on a vehicle, rather than an initial installation or factory state, so that the two brake pads of the caliper body 100 are in a braking state after slipping, the displacement sensor 300 is zeroed, and then the transformer 400 is controlled to pressurize the caliper body 100 at a second pressurization speed, so that the caliper body 100 is pressurized to a second pressure value, and maintained at the second pressure value after a second preset time, and then the caliper body 100 is depressurized.

[0111] Among them, the second pressurization speed is greater than the first pressurization speed, the second pressure value is greater than the first pressure value, and the second preset time is less than the first preset time, thereby simulating the working process of the floating hydraulic brake caliper when the driver steps on the accelerator pedal. At this time, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 is the deformation of the caliper body 100 after pressurization, so that the user can intuitively observe or record the corresponding data of the deformation of the caliper body 100 and the internal pressure, thereby evaluating the stiffness of the floating hydraulic brake caliper to ensure the braking performance and safety of the vehicle.

[0112] Reference Figure 1 and Figure 5 As shown, it can be understood that the test method, in step S210, controls the transformer 400 to pressurize the clamp body 100 at a first pressurization speed, pressurizes the clamp body 100 to a first pressure value, and maintains the first pressure value for a first preset time, and then adjusts the displacement sensor 300 to zero, including the following steps:

[0113] Step S211 , controlling the transformer 400 to increase the pressure of the clamp body 100 at a pressurizing speed of 1 MPa / s, so that the pressure of the clamp body 100 is increased to 2 MPa, and maintained at 2 MPa for 60 seconds, and then the displacement sensor 300 is adjusted to zero.

[0114] Reference Figure 1 and Figure 5 As shown, specifically, the test method controls the transformer 400 to pressurize the caliper body 100 at a first pressurizing speed of 1 MPa / s, so that the caliper body 100 is pressurized to a first pressure value of 2 MPa, and maintained at 2 MPa for 60 seconds, and then the displacement sensor 300 is zeroed. The test method controls the first pressurizing speed, the first pressure value and the first preset time to accurately simulate the working scene of the floating hydraulic brake caliper that has been assembled on the vehicle, rather than the initial installation or factory state, so that the two brake pads of the caliper body 100 slide and abut against the disc body, and the displacement sensor 300 is zeroed. After the transformer 400 pressurizes the caliper body 100 again, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 is the deformation of the caliper body 100 after pressurization, so that the user can intuitively observe or record the corresponding data of the deformation of the caliper body 100 and the internal pressure, thereby evaluating the stiffness of the floating hydraulic brake caliper to ensure the braking performance and safety of the vehicle.

[0115] Reference Figure 1 and Figure 5As shown, the test method can make the brake pad of the caliper body 100 abut against the disc body by setting the first pressurizing speed, the first pressure value and the first holding time. At this time, the caliper body 100 has completed the sliding. After the displacement sensor 300 is adjusted to zero, the interference caused by the sliding of the caliper body 100 on the detection value of the displacement sensor 300 can be eliminated. Subsequently, the transformer 400 pressurizes the caliper body 100, and the caliper body 100 has a tendency to expand and deform. The sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 is the deformation of the caliper body 100, so that the user can intuitively observe or evaluate the stiffness of the floating hydraulic brake caliper, thereby improving the accuracy of the stiffness test of the floating hydraulic brake caliper.

[0116] Reference Figure 1 and Figure 5 As shown, it can be understood that, in step S220, the test method controls the transformer 400 to pressurize the clamp body 100 at a second pressurization speed, pressurizes the clamp body 100 to a second pressure value, and maintains the second pressure value for a second preset time, and then releases the pressure of the clamp body 100, including the following steps:

[0117] Step S221 , controlling the transformer 400 to increase the pressure of the clamp body 100 at a pressurizing speed of 4 MPa / s, so that the pressure of the clamp body 100 is increased to 16 MPa, and maintained at 16 MPa for 1 second, and then the pressure of the clamp body 100 is relieved.

[0118] Reference Figure 1 and Figure 5 As shown, specifically, the test method controls the transformer 400 to pressurize the caliper body 100 at a second pressurization speed of 4 MPa / s, so that the caliper body 100 is pressurized to a second pressure value of 16 MPa, and maintained at 16 MPa for 1 second, and then the caliper body 100 is depressurized, thereby simulating the working process of the floating hydraulic brake caliper when the driver steps on the accelerator pedal. At this time, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 is the deformation of the caliper body 100 after pressurization, so that the user can intuitively observe or record the corresponding data of the deformation of the caliper body 100 and the internal pressure, thereby evaluating the stiffness of the floating hydraulic brake caliper to ensure the braking performance and safety of the vehicle.

[0119] Reference Figure 1 and Figure 6 As shown, it is understandable that the test method in step S300 further includes the following steps:

[0120] Step S310, obtaining first detection values ​​of two displacement sensors 300, and adding the absolute values ​​of the two first detection values ​​as a first measurement value;

[0121] Step S320, after the transformer 400 is controlled to increase the pressure on the clamp body 100, the second detection values ​​of the two displacement sensors 300 are obtained, and the absolute values ​​of the two second detection values ​​are added together as a second measurement value;

[0122] Step S330, calculating the difference between the second measurement value and the first measurement value as the deformation amount.

[0123] Reference Figure 1 and Figure 6 As shown, when the test method calculates the deformation of the caliper body 100 according to the detection value, the absolute values ​​of the two first detection values ​​are added as the first measurement value. After the control transformer 400 pressurizes the caliper body 100, the absolute values ​​of the two second detection values ​​are added as the second measurement value. The difference between the second measurement value and the first measurement value is the deformation of the caliper body 100, so as to obtain the corresponding data of the deformation of the caliper body 100 and the internal pressure, so as to realize the stiffness test of the caliper body 100. The test method eliminates the interference of the slip amount of the floating hydraulic brake caliper on the stiffness test by the way of two displacement sensors 300 for opposite detection, which is beneficial to improve the test accuracy of the stiffness test device of the floating hydraulic brake caliper, and the test is simpler and more convenient, which is beneficial to reduce the complexity of the test operation.

[0124] Reference Figure 1 and Figure 7 As shown, it can be understood that the test method further includes the following steps:

[0125] Step S400, constructing a relationship curve between the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 and the internal pressure;

[0126] Step S500: outputting the relationship curve to the user.

[0127] Reference Figure 1 and Figure 7 As shown, specifically, since the test method maintains the pressure of the clamp body 100 and performs zeroing processing on the displacement sensor 300 after pressurizing the clamp body 100 to the first pressure value, when the transformer 400 pressurizes the clamp body 100, the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 is the deformation of the clamp body 100.

[0128] The test method constructs a relationship curve between the sum of the absolute values ​​of the detection values ​​of the two displacement sensors 300 and the internal pressure of the caliper body 100, and outputs the relationship curve to the user, so that the user can intuitively observe the relationship between the deformation of the caliper body 100 and the internal pressure, thereby making an accurate evaluation of the stiffness of the floating hydraulic brake caliper, which is beneficial to improving the accuracy of the test method for the stiffness test of the floating hydraulic brake caliper and ensuring the braking performance and safety of the vehicle.

[0129] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A stiffness testing device for a floating hydraulic brake caliper, the floating hydraulic brake caliper comprising a caliper body, characterized in that: The stiffness testing device of the floating hydraulic brake caliper comprises: A mounting bracket, configured to be connected to the caliper body, wherein the caliper body can slide relative to the mounting bracket; A detection assembly, comprising two displacement sensors, both of which are connected to the mounting bracket, and are respectively arranged on two opposite sides of the caliper body and arranged along the sliding direction of the caliper body, and the detection heads of the displacement sensors are in contact with the caliper body; The transformer is configured to increase or reduce the pressure of the clamp body.

2. The floating hydraulic brake caliper stiffness testing device according to claim 1, characterized in that: The mounting bracket comprises a slide rail, and the slide rail is slidably connected to the clamp body.

3. The floating hydraulic brake caliper stiffness testing device according to claim 1, characterized in that: The stiffness testing device of the floating hydraulic brake caliper further comprises a pressure sensor and a shut-off valve. The pressure sensor is used to detect the internal pressure of the caliper body. The shut-off valve is configured to control the connection and disconnection between the transformer and the caliper body according to the internal pressure of the caliper body.

4. A test method, characterized in that: The stiffness testing device for a floating hydraulic brake caliper according to any one of claims 1 to 3, wherein the testing method comprises: Connecting the clamp body and the displacement sensor to the mounting bracket; Controlling the transformer to increase the pressure on the clamp body, and recording the detection value of the displacement sensor; The deformation amount of the caliper body is calculated according to the detection value, and corresponding data of the deformation amount and the internal pressure of the caliper body are obtained.

5. The testing method according to claim 4, characterized in that: The step of calculating the deformation of the clamp body according to the detection value comprises: Acquire first detection values ​​of the two displacement sensors, and add absolute values ​​of the two first detection values ​​as a first measurement value; After controlling the transformer to increase the pressure of the clamp body, obtaining the second detection values ​​of the two displacement sensors, and adding the absolute values ​​of the two second detection values ​​as the second measurement value; The difference between the second measured value and the first measured value is calculated as the deformation amount.

6. The testing method according to claim 4, characterized in that: The step of controlling the transformer to increase the pressure of the clamp body comprises: Controlling the transformer to pressurize the clamp body at a first pressurizing speed, so that the clamp body is pressurized to a first pressure value, and maintaining the first pressure value for a first preset time, and then adjusting the displacement sensor to zero; The transformer is controlled to pressurize the clamp body at a second pressurization speed, so that the clamp body is pressurized to a second pressure value, and maintained at the second pressure value after a second preset time, and then the clamp body is depressurized, the second pressurization speed is greater than the first pressurization speed, the second pressure value is greater than the first pressure value, and the second preset time is less than the first preset time.

7. The testing method according to claim 6, characterized in that: The step of controlling the transformer to pressurize the clamp body at a first pressurization speed so that the clamp body is pressurized to a first pressure value and maintained at the first pressure value for a first preset time, and then adjusting the displacement sensor to zero, comprises: The transformer is controlled to increase the pressure of the clamp body at a pressurizing speed of 1 MPa / s, so that the pressure of the clamp body is increased to 2 MPa, and after maintaining at 2 MPa for 60 seconds, the displacement sensor is adjusted to zero.

8. The testing method according to claim 6, characterized in that: The step of controlling the transformer to pressurize the clamp body at a second pressurization speed, pressurizing the clamp body to a second pressure value, and maintaining the second pressure value for a second preset time, and then relieving the pressure of the clamp body comprises: The transformer is controlled to increase the pressure of the clamp body at a pressurizing speed of 4 MPa / s, so that the pressure of the clamp body is increased to 16 MPa, and after maintaining at 16 MPa for 1 second, the pressure of the clamp body is relieved.

9. The testing method according to claim 6, characterized in that: The testing method further comprises: Constructing a relationship curve between the sum of the absolute values ​​of the detection values ​​of the two displacement sensors and the internal pressure; The relationship curve is output to a user.

10. The testing method according to claim 4, characterized in that: The floating hydraulic brake caliper also includes a piston slidably connected to the caliper body; the caliper body and the displacement sensor are connected to the mounting bracket, including: The moving direction of the detection head is controlled to be parallel or coaxial with the axis of the piston, and the detection head is brought into contact with the flat part of the caliper body.

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