Commercial vehicle electronic mechanical brake clamping force test tool

Abstract

The utility model provides a commercial vehicle electronic mechanical brake clamping force test tool, the test tool comprises a tool body, a test assembly and a sample adaptation assembly, the tool body is provided with a bottom plate and a pair of side plates, a pair of high-precision force sensors of the test assembly are respectively installed on the inner sides of the side plates, and the sample adaptation assembly is installed on the bottom plate. A pair of sample adapting blocks of the sample adapting assembly are movably arranged between two side plates through guide sliding rails and are provided with a first surface and a second surface which are opposite to each other, and the first surface is an inwards-concave cambered surface matched with the arc-shaped outline of the brake shoe to form surface contact so as to completely bear the radial expansion force; the second surface is a plane and is used for end face contact of the force sensor to ensure accurate transmission of force along the measuring axis. According to the utility model, through an optimized force transmission path, the problem of measurement deviation caused by an arc-shaped contact surface is solved, and the accuracy, the stability and the efficiency of a clamping force test are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of brake testing devices, specifically to a tooling for testing the clamping force of electromechanical brakes for commercial vehicles. Background Technology

[0002] Electromechanical Braking (CEMB) for commercial vehicles is a braking system based on electrical signal transmission. It uses sensors to perceive external environmental information, replacing traditional mechanical connections. It offers advantages such as high control precision, fast response speed, compact structure, and light weight, making it suitable for advanced intelligent driving systems with stringent requirements for vehicle handling and active safety. As the automotive industry progresses towards advanced driver assistance systems, the reliability of CEMB, as a key component in the upgrade of chassis systems to drive-by-wire mechanisms, is of paramount importance.

[0003] During the design, development, and factory verification of the CEMB brake system, braking clamping force is one of the core performance indicators, directly affecting braking performance and driving safety. Traditional testing procedures typically involve mounting the brake pads in a test fixture, driving the pads to open so they contact a force sensor and transmit clamping force, thereby reading test data. However, because the CEMB brake pads have a protruding arc-shaped surface, while the contact surface used to transmit clamping force in traditional test fixtures is flat, the two cannot achieve complete contact. This results in uneven force transmission to the force sensor, causing significant deviations in the test data and affecting the accuracy and reliability of the evaluation results.

[0004] Therefore, existing test fixtures, due to mismatched contact shapes, cannot accurately reflect the clamping force performance of CEMB under actual working conditions. There is an urgent need for a test fixture that can adapt to curved contact surfaces, ensure the integrity of the force transmission path, and provide stable, accurate, and reliable test data. Summary of the Invention

[0005] The purpose of this utility model is to provide a clamping force testing fixture for commercial vehicle electromechanical brakes. Through systematic structural design, it not only accurately solves the measurement problem caused by the arc-shaped contact surface, but also achieves comprehensive optimization in terms of testing efficiency, ease of operation and equipment reliability, significantly improving the level and efficiency of product development and quality verification of commercial vehicle electromechanical brakes.

[0006] To achieve the above objectives, the present invention proposes the following technical solution:

[0007] A fixture for testing the clamping force of an electromechanical brake in a commercial vehicle includes:

[0008] The tooling body includes a base plate and a pair of side plates disposed opposite to each other at both ends of the base plate;

[0009] The test assembly includes a pair of force sensors, which are respectively fixedly mounted on the opposite inner surfaces of the pair of side plates, and the measurement axes of the two force sensors are collinear.

[0010] The sample adapter assembly includes a pair of sample adapter blocks and a guide mechanism for guiding the movement of the sample adapter blocks;

[0011] A pair of sample adapter blocks are slidably disposed between a pair of side plates via the guide mechanism, and are respectively disposed opposite to a pair of force sensors;

[0012] Each of the sample adapter blocks has a first surface and a second surface facing away from each other. The first surface is constructed as a concave arc surface for fitting with the arc-shaped outer contour of the brake shoe, and is used to completely bear the radial tension of the brake shoe. The second surface is constructed as a force-transmitting plane for contacting the sensing end face of the force sensor.

[0013] The guiding direction of the guiding mechanism is parallel to the measuring axis of the force sensor, which is used to constrain the sample adapter block to slide only along the direction of the measuring axis, so that the radial tension is converted into an axial thrust transmitted to the force sensor along the measuring axis.

[0014] As a preferred technical solution of this utility model, the guiding mechanism includes at least two guide rails;

[0015] The fixed end of the guide rail is fixed to the inner surface of the side plate, and its guide end extends horizontally and is parallel to the measuring axis of the force sensor.

[0016] The sample adapter block has a strip groove that matches the guide end of the guide rail. The length direction of the strip groove is parallel to the measurement axis of the force sensor, so that the sliding of the guide end of the guide rail in the strip groove is restricted in the direction of the measurement axis.

[0017] As a preferred embodiment of the present invention, the tooling body further includes at least one connecting rod, which is connected between the upper and / or lower ends of the pair of side plates.

[0018] As a preferred technical solution of this utility model, it also includes a sliding component;

[0019] The sliding assembly includes a sliding guide rail disposed on the base plate and a sample positioning seat slidably connected to the sliding guide rail;

[0020] The sample positioning seat is used to mount the brake to be tested and can move in a direction perpendicular to the measurement axis of the force sensor.

[0021] In a preferred embodiment of this invention, the sliding guide rail is a linear guide rail pair, and the bottom end of the sample positioning seat is connected to the linear guide rail pair via a slider.

[0022] As a preferred embodiment of this utility model, the top of the sample positioning seat is provided with a mounting bracket for mounting and fixing the brake to be tested.

[0023] As can be seen from the above technical solutions, the present invention provides a clamping force testing fixture for electromechanical brakes in commercial vehicles, which has the following advantages compared with the prior art:

[0024] 1. This invention achieves precise conversion of the force transmission path, fundamentally improving testing accuracy. Through the synergistic effect of a specially designed sample adapter block and guide rail, this invention completes two key optimizations of the force transmission interface and strict motion constraints. First, its concave arc-shaped test surface forms a highly fitted surface contact with the arc-shaped outer contour of the brake shoe, completely, vertically, and without damage, converting the radial expansion force of the shoe opening into a horizontal thrust acting on the adapter block. Second, this horizontal thrust propels the sample adapter block along a precisely arranged guide rail. The guide direction of the rail is strictly parallel to the measurement axis of the force sensor, thus forcing the sample adapter block to slide only along this measurement axis. This guiding constraint completely eliminates any lateral offset or rotation that may occur during the thrust transmission process. Finally, the precision-machined force transmission surface forms an ideal planar contact with the sensing end face of the force sensor, ensuring that the horizontal thrust is transmitted to the sensor's sensing core strictly along the measurement axis of the force sensor without deviation. The combination of the sample adapter block, guide rail, and force sensor forms a closed, high-fidelity force transmission chain from force application and guidance to measurement. This effectively eliminates stress concentration, force flow distortion, and lateral force interference caused by contact mismatch, ensuring that the measured value truly reflects the tension of the shoe under test, thus providing a reliable data basis for accurately characterizing the clamping force.

[0025] 2. The modular and guided design enhances the versatility, stability, and ease of operation of the testing fixture. The sample adapter block features a split design, allowing for quick replacement to accommodate the curved contours of different brake shoe models, achieving multi-purpose functionality and significantly improving the applicability and efficiency of the testing fixture. Simultaneously, the precision guide rail provides strict linear guidance constraints for the movement of the sample adapter block, ensuring consistency in force transmission direction during each test and preventing deflection or jamming during force application, thus guaranteeing the stability and repeatability of the testing process. Combined with the independent sliding guide rail and sample positioning seat at the bottom, rapid and accurate positioning and clamping of test samples are achieved, simplifying the operation process.

[0026] 3. The fixture body, through the base plate, side plates and reinforcing connecting rods, forms a stable frame structure that can effectively resist the huge horizontal thrust generated when the brake shoes open, preventing the fixture itself from deforming or vibrating during testing. It provides a reliable installation benchmark and a stable working environment for the high-precision force sensor, ensuring data consistency and equipment durability for long-term, large-scale testing tasks from a hardware perspective.

[0027] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other.

[0028] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description, taken in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0029] The accompanying drawings are not drawn to scale according to a true reference numeral. In the drawings, each identical or nearly identical component shown in the various figures can be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the test fixture according to an embodiment of the present invention.

[0031] The meanings of the reference numerals in the figure are as follows:

[0032] 1. Base plate; 2. Side plate; 3. Connecting rod; 4. Force sensor; 5. Sample adapter block; 6. Guide rail; 7. Test sample; 8. Sliding guide rail; 9. Sample positioning seat. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0034] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] To address the issue that existing testing fixtures are incompatible with test samples, making it difficult to accurately reflect the clamping force performance of CEMB under actual working conditions, this invention proposes a testing fixture that can adapt to curved contact surfaces, ensures an intact force transmission path, and provides stable, accurate, and reliable testing data.

[0036] It should be specifically noted that, in the context of this utility model, the clamping force of the commercial vehicle electromechanical brake specifically refers to the radial normal pressure exerted by the brake shoes on the rigid support surface (simulating the inner wall of the brake drum) in contact with the brake shoes when the drive mechanism (e.g., the motor drive unit) of the drum brake opens, in order to generate a braking effect. As can be seen from the working principle of the drum brake, this clamping force directly originates from the expansion force generated when the drive mechanism pushes the brake shoes outward, i.e., "shoe tension." When the drum brake assembly operates independently (not installed in the vehicle), this tension manifests as the radial pressure exerted by the brake shoes on its external constraint (e.g., the concave arc surface of the sample adapter block 5 of the test fixture described in this utility model). Therefore, in the static pressure state simulated by this test fixture, where the brake shoes are initially in contact with the brake drum and have not yet slipped relative to it, the shoe tension is numerically and physically equivalent to the initial clamping force provided by the drum brake. The testing fixture of this invention accurately characterizes the clamping force performance of the drum brake by directly measuring the shoe tension through a high-fidelity force transmission path.

[0037] The measurement objective of the test fixture in this embodiment of the invention is not to simulate a complete actual braking condition, but to accurately measure the shoe tension generated by the initial and crucial action of the drive mechanism causing the shoe to open. Since this shoe tension is the direct cause of the radial pressure exerted by the shoe on the brake drum, and is the mechanical root and quantifiable benchmark for all braking performance of the drum brake, the clamping force performance of the drum brake can be accurately characterized and calibrated by precisely measuring the shoe tension. This causal relationship is specifically manifested in that shoe tension is the direct cause and measurement basis of the clamping force.

[0038] Therefore, the clamping force test in this embodiment of the invention aims to specify its final evaluation object and engineering goal, while the measurement of hoof tension described in the specific implementation is a concrete and operable physical quantity measured to achieve this goal. In this solution, the two constitute a relationship between goal and means, result and causality. This expression conforms to the conventional understanding of those skilled in the art and industry practice. By measuring controllable hoof tension to reliably evaluate the final clamping force, the effectiveness and engineering practicality of the test are ensured.

[0039] This utility model provides a testing fixture for clamping force of electromechanical brakes in commercial vehicles, comprising a testing component, a sample fitting component, a fixture body, and a sliding component. The components are combined to form a testing fixture that can adapt to arc-shaped contact surfaces, ensure the integrity of the force transmission path, and provide stable, accurate, and reliable testing data.

[0040] The fixture body includes a base plate 1 and a pair of side plates 2. The base plate 1 has a rectangular structure with mutually perpendicular length and width directions. For ease of description, the two ends in the length direction of the base plate 1 are referred to as the first end and the second end, and the two ends in the width direction are referred to as the third end and the fourth end. The line connecting the center of the first end and the center of the second end of the base plate 1 is parallel to the measurement axis of the force sensor 4, and is denoted as the first path. The line connecting the center of the third end and the center of the fourth end of the base plate 1 is the movement path for loading and unloading the test sample 7, and is denoted as the second path. The first path and the second path are perpendicular to each other. A pair of identical side plates 2 are symmetrically arranged at the first and second ends of the base plate 1, and the side plates 2 are perpendicularly connected to the base plate 1, specifically by welding or screws. A test area is reserved between the two side plates 2 for installing the sample adapter block 5, and space is reserved for the test sample 7 to move along the second path.

[0041] Furthermore, the test sample of this utility model is a brake with shoe-shaped pads, such as a drum brake. During the test of this brake, the two side plates 2 on the base plate 1 will be subjected to a large thrust generated when the shoe-shaped pads open. Therefore, in order to ensure the overall structural stability of the tooling body, the side plates 2 that are relatively arranged in the length direction of the base plate 1 are reinforced. Figure 1As shown, at least one connecting rod 3 is connected between the upper and / or lower ends of the two side plates 2. The connecting rod 3 strengthens the overall frame structure and prevents the frame structure from deforming during the test.

[0042] like Figure 1 As shown, the test assembly includes two high-precision force sensors 4 and their mounting bases. Each force sensor 4 is mounted on the inner surface of a side plate 2 via the mounting base, and the measuring axes of the two force sensors 4 are collinear. The direction of this measuring axis is the main transmission direction of the clamping force being measured during the test.

[0043] The sample adapter assembly includes a pair of sample adapter blocks 5 and several guide rails 6. Each sample adapter block 5 is a rectangular block structure made of high-strength aluminum alloy or tool steel, and has a first surface and a second surface facing away from each other. Each sample adapter block 5 is slidably connected to the inner surface of a side plate 2 by at least two guide rails 6, so that the two sample adapter blocks 5 are symmetrically arranged between the two side plates 2.

[0044] Specifically, the first surface of each sample adapter block 5 is constructed as a concave arc surface that matches the arc-shaped outer contour of the test sample 7, i.e., the brake shoe, and is defined as the test surface. The axis of symmetry of the concave arc surface coincides with the measurement axis of the force sensor 4, ensuring that the radial force transmitted from the brake shoe to the sample adapter block 5 is completely converted into axial thrust in the direction of the measurement axis, avoiding the influence of lateral force or torque on measurement accuracy. The radius of curvature of the concave arc surface of the sample adapter block 5 matches the radius of curvature of the outer contour of the brake shoe under test, with an allowable tolerance of ±0.5mm, to ensure the integrity of the surface contact. This design allows the test surface of the sample adapter block 5 to form a highly fitted surface contact with the arc-shaped outer surface of the brake shoe during testing. This contact method ensures that the radial force generated when the hoof plates open can be uniformly and vertically transmitted to the sample adapter block 5, effectively avoiding the stress concentration and skewed force transmission path caused by point contact or line contact due to mismatch of contact surfaces in the prior art, thus ensuring the accuracy and consistency of the initial force state from the source.

[0045] The second surface of the sample adapter block 5 is a precision-machined force-transmitting plane, defined as the force-transmitting surface. This force-transmitting plane is perpendicular to the axis of symmetry of the concave arc surface, with a flatness error not exceeding 0.02 mm, ensuring parallel contact with the end face of the force sensor 4. The force sensor 4 is positioned on the inner surface of the side plate 2 directly opposite the force-transmitting surface, allowing direct parallel contact between this surface and the sensing end face of the force sensor 4. This plane-to-plane contact ensures that the force transmitted from the sample adapter block 5 to the force sensor 4 is transmitted strictly along its measurement axis. This design eliminates lateral forces or bending moments that may arise due to non-parallel or curved contact surfaces, preventing these non-test force direction interference components from causing measurement errors or even damaging the high-precision force sensor 4, thereby significantly improving the accuracy and reliability of the clamping force test data.

[0046] Since the clamping force to be measured in this invention is essentially a radial pressure distributed along the normal direction of the shoe's arc-shaped surface, traditional planar load-bearing structures cannot achieve complete and vertical force transmission. Therefore, this invention creatively employs a sample adapter block 5 with a concave arc surface, which, through a surface contact form that perfectly matches the shoe's contour, ensures that all radial force components are received and integrated without omission. Then, through the constraint of the guide rail 6 and the docking with the planar force transmission surface, it is finally transformed into a single axial force that can be accurately measured by a high-precision force sensor 4. This fundamentally solves the measurement distortion problem caused by mismatched contact forms and achieves high-fidelity measurement of the core output parameters of the drum brake.

[0047] Among them, such as Figure 1As shown, each sample adapter block 5 is slidably connected to the side plate 2 via at least two guide rails 6. Specifically, the sample adapter block 5, which has an overall rectangular block structure, has a test surface for direct contact with the brake shoe and a force transmission surface for direct contact with the force sensor 4, as well as a third and fourth surface that are parallel to each other. The third and fourth surfaces intersect the second surface perpendicularly. Both the third and fourth surfaces are provided with linearly arranged strip grooves for connecting the guide rails 6. The length direction of the strip grooves is strictly parallel to the measurement axis of the force sensor 4, and the width direction of the strip grooves has a circular or square cross-section to accommodate cylindrical linear guide posts or rectangular linear guides. Self-lubricating bushings or linear bearings can be embedded in the strip grooves to reduce sliding friction and improve guiding accuracy. Each guide rail 6 is preferably a T-shaped structure, including a fixed end for mounting and a guide end for linear guidance. The guide end is preferably a cylindrical linear guide post or a rectangular linear guide, which is perpendicularly connected to the fixed end to form a T-shaped structure. The fixed end of the guide rail 6 is fixedly installed on the inner surface of the side plate 2 by fasteners (such as screws, bolts, etc.), and the guide end and the fixed end are connected by welding or integral molding to ensure that the guide end will not twist in any direction with the fixed end as the fulcrum. This ensures that the guide end can only extend in a straight line after installation, and that the axis of the guide end is parallel to the measuring axis of the force sensor 4, and is precisely inserted into the strip groove to form a sliding pair. Furthermore, the guide end is hardened to have a smooth surface, ensuring smooth and unobstructed sliding contact with the strip groove. The contact between the guide rail 6 and the strip groove itself provides radial constraint to prevent the sample adapter block 5 from disengaging; the two parallel guide rails 6 together form a high-precision linear motion reference. When the shoe pushes the sample adapter block 5, this sliding pair structure forces it to move only along a straight path parallel to the measurement axis of the force sensor 4, completely eliminating the possibility of lateral offset, warping or rotation, thereby ensuring the uniqueness, straightness and high repeatability of the force transmission path from the shoe to the force sensor 4, effectively avoiding measurement deviation or mechanism jamming caused by motion inaccuracy.

[0048] The sliding assembly includes a sliding guide rail 8 and a sample positioning seat 9. The sliding guide rail 8 is disposed on the base plate 1 between the two sample adapter blocks 5 and extends along the second path to realize displacement changes along the second path. The bottom end of the sample positioning seat 9 is slidably connected to the sliding guide rail 8 by a sliding component such as a slider, and its top end is provided with a holder for mounting the test sample 9.

[0049] In some preferred embodiments of this utility model, the sliding guide rail 8 can be a standard linear guide rail pair, such as a guide rail base detachably fixed to the base plate 1 by bolts, and at least one matching slider. The bottom end of the sample positioning seat 9 is provided with a mounting base plate, which is fixedly connected to the upper surface of the slider by fastening bolts, thereby forming a stable moving assembly with the sliding guide rail 8. The top end of the sample positioning seat 9 is provided with a holder for mounting and positioning the test sample 7. Through this sliding assembly, the operator can easily push or pull the sample positioning seat 9 along the sliding guide rail 8, achieving precise entry, exit, and positioning of the test sample 7 within the test area of ​​the test fixture.

[0050] It should be noted that the connection method between the sliding guide rail 8 and the sample positioning seat 9 of this utility model is not limited to the above-mentioned linear guide rail pair and slider cooperation. Those skilled in the art will understand that any existing structure capable of achieving linear guidance and positioning, such as dovetail groove guide rails, linear bearings and optical shaft cooperation, etc., can be applied here. The focus of protection of this utility model is to solve the problem of accurate measurement of the clamping force of the arc-shaped shoe through the coordinated cooperation of the test component, the sample adapter block 5, and the tooling body. The main function of the sliding component is to provide convenience for loading and moving the test sample; its specific guiding structure should not constitute a limitation on the scope of protection of this utility model.

[0051] The working principle of this utility model is as follows:

[0052] Preparation stage: Push the two sample adapter blocks 5 along the guide rail 6 towards the side plate 2, so that they are far apart, leaving operating space for installing the test sample 7. Then, push the sample positioning seat 9 with the brake to be tested installed into the test area between the two sample adapter blocks 5 along the sliding guide rail 8.

[0053] Alignment and bonding stage: The sample adapter blocks 5 on both sides are pushed towards each other, so that their test surfaces are tightly bonded to the arc-shaped outer surface of the brake shoe. At this time, the sample adapter block 5 is positioned under the constraint of the guide rail 6, and its force transmission surface remains parallel to the sensing end face of the force sensor 4 with a slight gap.

[0054] Force transmission and measurement stage: The hoof of test sample 7 slowly opens. Since the arc-shaped surface of the hoof is completely in contact with the test surface of the sample adapter block 5, the radial expansion force generated by the opening of the hoof is efficiently and losslessly converted into a horizontal thrust acting on the sample adapter block 5. This horizontal thrust pushes the sample adapter block 5 to move linearly along the guide rail 6 until its force-transmitting surface is in complete contact with and compacted against the sensing end face of the force sensor 4. Subsequently, the thrust is precisely and axially transmitted to the force sensor through this planar contact pair, and its value is accurately measured by the sensor.

[0055] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A commercial vehicle electromechanical brake clamp force test fixture, characterized by, The utility model relates to a kind of brake caliper testing device, including: Tool body, including bottom plate (1) and the pair of side plate (2) oppositely arranged in the both ends of the bottom plate (1); Test assembly, including a pair of force sensors (4), a pair of the force sensor (4) is respectively fixedly installed on the opposite inner side surface of a pair of the side plate (2), and the measurement axis of two the force sensor (4) is collinear; Sample adapter assembly, including a pair of sample adapter blocks (5) and guiding mechanism for guiding the movement of the sample adapter block (5); A pair of the sample adapter block (5) is slidably arranged between a pair of the side plate (2) by the guiding mechanism, and is respectively arranged corresponding to a pair of the force sensor (4); Wherein, each sample adapter block (5) has a first surface and a second surface facing away from each other, the first surface is configured as a concave arc surface for fitting with the arc-shaped outer contour of the brake caliper shoe, for complete receiving brake caliper shoe radial tension;The second surface is configured as a force transmission plane for contacting the sensing end surface of the force sensor (4); The guiding direction of the guiding mechanism is parallel to the measurement axis of the force sensor (4), for restricting the sample adapter block (5) to be able to slide only in the direction of the measurement axis, so that the radial tension is converted into axial thrust along the measurement axis to the force sensor (4).

2. The commercial vehicle electro-mechanical brake clamp force test fixture of claim 1, wherein, The guiding mechanism includes at least two guiding rails (6); The fixed end of the guiding rail (6) is fixed to the inner side surface of the side plate (2), and the guiding end extends horizontally and is parallel to the measurement axis of the force sensor (4); A strip-shaped sliding groove is formed on the sample adapter block (5) and matched with the guiding end of the guiding rail (6), the length direction of the strip-shaped sliding groove is parallel to the measurement axis of the force sensor (4), so that the sliding of the guiding end of the guiding rail (6) in the strip-shaped sliding groove is limited in the direction of the measurement axis.

3. The commercial vehicle electro-mechanical brake clamp force test fixture of claim 1, wherein, The tool body further includes at least one connecting rod (3), and the connecting rod (3) is connected between the upper end and / or lower end of a pair of the side plate (2).

4. The commercial vehicle electro-mechanical brake clamp force test fixture of claim 1, wherein, It also includes a sliding assembly; The sliding assembly includes a sliding guide rail (8) arranged on the bottom plate (1) and a sample positioning seat (9) slidably connected to the sliding guide rail (8); The sample positioning seat (9) is used for installing the brake to be tested, and can move in a direction perpendicular to the measurement axis of the force sensor (4).

5. The commercial vehicle electromechanical brake clamp force test fixture of claim 4, wherein, The sliding guide rail (8) is a linear guide pair, and the bottom end of the sample positioning seat (9) is connected to the linear guide pair through a sliding block.

6. The commercial vehicle electromechanical brake clamp force test fixture of claim 5, wherein, The top end of the sample positioning seat (9) is provided with a clamping seat for mounting and fixing the brake to be tested.

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