Testing device and method for EMB for commercial vehicle

Abstract

The invention belongs to the technical field of detection, and particularly relates to a device and method for testing an EMB for a commercial vehicle, and the device comprises a supporting pedestal; the detection assembly is arranged on one side of the supporting base and used for detecting the temperature of the brake disc; the electrifying assembly comprises a lifting driving mechanism and an electrifying connecting plug arranged at the movable end of the lifting driving mechanism, and a liftable binding post is arranged in the electrifying connecting plug; the linkage limiting structure is arranged on the outer wall of the power-on connecting plug in a sliding manner and is in mechanical linkage with the binding post; when the power-on connecting plug is inserted into the brake disc wiring part, the linkage limiting structure is extruded by the side wall of a groove of the wiring part to contract inwards. The binding post moves upwards to enable the bottom of the power-on connecting plug to abut against the wiring part; when the brake disc vibrates to cause displacement of the electrified connecting plug, the linkage limiting structure extends outwards to abut against the surface of the brake disc and drives the binding post to move downwards to maintain electrical connection. And through the linkage limiting structure, the stability of electrical connection between the electrified connecting plug and the brake disc is improved.

Description

Technical Field

[0001] The present invention belongs to the field of detection technology, and particularly relates to a test device for electrical performance, and more particularly to a test device and method for EMB of commercial vehicles. Background Art

[0002] In the field of vehicle braking system detection for EMB (Electromechanical Braking System), the detection of the temperature rise of the brake disc is a core link for evaluating braking performance and safety.

[0003] In the related art, the brake disc is horizontally placed on the test bench, the power-on plug connector is rigidly connected to the wiring part of the brake disc and powered on, and then the temperature rise detection head is close to the brake disc to detect the temperature change of the brake disc in real time.

[0004] During the test of the brake disc heating up by power supply, local high temperature (above 300 °C) will be generated on the brake disc, and significant temperature gradients are formed in the non-contact area due to the influence of air convection. The anisotropy of the coefficient of thermal expansion of the material leads to structural stress imbalance, resulting in the vibration of the brake disc. This vibration has inherent characteristics and forms a positive feedback cycle of "temperature rise → deformation → vibration → increased temperature rise"; and the vibration of the brake disc affects the electrical connection stability with the power-on plug connector.

[0005] Therefore, how to avoid the deterioration of the connection stability between the brake disc and the power-on plug connector due to thermal deformation and vibration of the brake disc is a technical problem that needs to be solved urgently in this field.

[0006] It should be noted that the above information disclosed in this background art part is only used to understand the background art of the concept of this application. Therefore, the above description is not considered as information on the related art. Summary of the Invention

[0007] The embodiments of the present disclosure at least provide a test device and method for EMB of commercial vehicles.

[0008] In a first aspect, the embodiments of the present disclosure provide a test device for EMB of commercial vehicles, including: A support base; A detection component, which is arranged on one side of the support base and is used to detect the temperature of the brake disc; A power-on component, including a lifting drive mechanism and a power-on plug connector arranged at its movable end, and a liftable wiring column is arranged in the power-on plug connector; A linkage limiting structure, which is slidably arranged on the outer wall of the power-on plug connector and is mechanically linked with the wiring column; Wherein, when the power-on plug connector is inserted into the wiring part of the brake disc, the linkage limiting structure is squeezed inward and contracted by the side wall of the groove of the wiring part; The wiring column moves upward to make the bottom of the power-on plug connector abut against the wiring part; When the vibration of the brake disc causes the displacement of the energized plug connector, the linkage limit structure extends outwards to abut against the surface of the brake disc and drives the terminal post to move downwards to maintain electrical connection.

[0009] In an alternative embodiment, the linkage limit structure includes: a clamping plate, in which a limit opening is formed, and the terminal post is arranged to move up and down in the limit opening; A slope is arranged on the outer wall of the clamping plate; Wherein, when the energized plug connector is inserted into the wiring part of the brake disc, the slope abuts against the side wall of the groove of the wiring part, so that the clamping plate slides inwards.

[0010] In an alternative embodiment, a guiding groove is formed on one side of the terminal post away from the slope; A guiding surface is arranged on the side wall of the limit opening corresponding to the guiding groove; Wherein, when the clamping plate moves outwards, the guiding surface is inserted into the guiding groove to push the terminal post to move downwards to maintain the electrical connection between the terminal post and the wiring part.

[0011] In an alternative embodiment, a positioning cavity is formed in the energized plug connector, and the terminal post is arranged to move up and down in the positioning cavity; A positioning ring is sleeved on the outer wall of the terminal post, and the positioning ring is arranged below the guiding groove; A return spring is sleeved on the outer wall of the terminal post, and two ends of the return spring respectively abut against the positioning ring and the side wall of the positioning cavity; Wherein, the return spring is adapted to push the terminal post to move upwards.

[0012] In an alternative embodiment, the limit opening is rectangular, the opening width is the same as the outer diameter of the terminal post, and the opening length is not less than 1.5 times the outer diameter of the terminal post.

[0013] In an alternative embodiment, two wire clamping posts are symmetrically arranged at the upper end of the clamping plate, and the power cord connecting the terminal post and the main power supply is wound around the outer wall of the wire clamping post.

[0014] In an alternative embodiment, a limit groove is formed on the wire clamping post, and the width of the limit groove is greater than the outer diameter of the power cord.

[0015] In an alternative embodiment, the detection assembly includes: a fixing plate, which is vertically arranged on one side of the support base; A driving cylinder, which is rotatably arranged on the side wall of the fixing plate; A detection probe, which is arranged at the end of the piston rod of the driving cylinder, The driving cylinder is adapted to drive the detection probe to move towards the support base, so that the detection probe abuts against the brake disc.

[0016] In an alternative embodiment, an adjusting plate is rotatably provided on the side wall of the fixed plate, an adjusting column is slidably provided on the adjusting plate, and the adjusting column is bolted to the fixed plate; The driving cylinder is fixed on the side wall of the adjusting plate; Wherein, when the adjusting column is in a loosened state, the adjusting plate drives the driving cylinder to rotate relative to the fixed plate to adjust the contact position between the detection probe and the brake disc.

[0017] In an alternative embodiment, a support base; it is horizontally arranged for supporting the brake disc; A power-on plug connector is arranged on the support base in a lifting manner, A positioning cavity is formed in the power-on plug connector, a wiring column is arranged in the positioning cavity in a lifting manner, and the lower end of the wiring column is suitable for protruding from the power-on plug connector; A linkage limiting structure includes: a clamping plate, a limiting opening is formed therein, and the wiring column is arranged in the limiting opening in a lifting manner; A guiding groove is formed on the outer wall of the wiring column; A guiding surface is arranged on the side wall of the limiting opening corresponding to the guiding groove; Wherein, when the power-on plug connector is inserted into the wiring part of the brake disc, the clamping plate is squeezed inward and contracted by the side wall of the groove of the wiring part; The wiring column moves upward to make the bottom of the power-on plug connector abut against the wiring part; When the brake disc vibrates and causes the displacement of the power-on plug connector, the clamping plate extends outward to abut against the surface of the brake disc and drives the wiring column to move downward to maintain electrical connection.

[0018] In an alternative embodiment, a positioning ring is sleeved on the outer wall of the wiring column, and the positioning ring is arranged below the guiding groove; A return spring is sleeved on the outer wall of the wiring column, and the two ends of the return spring respectively abut against the positioning ring and the side wall of the positioning cavity; Wherein, the return spring is suitable for pushing the wiring column to move upward.

[0019] In a second aspect, the embodiments of the present disclosure further provide a test method for an EMB for commercial vehicles, and the detection method includes: After the brake disc is placed on the support base, the lifting drive mechanism drives the power-on plug connector to move towards the wiring part of the brake disc; When the power-on plug connector is inserted into the wiring part of the brake disc, the linkage limiting structure is squeezed inward and contracted by the side wall of the groove of the wiring part; The wiring column moves upward to make the bottom of the power-on plug connector abut against the wiring part; When the brake disc vibrates and causes the displacement of the power-on plug connector, the linkage limiting structure extends outward to abut against the surface of the brake disc and drives the wiring column to move downward to maintain electrical connection.

[0020] The beneficial effects of the present invention are as follows. The present invention provides a test device and method for an EMB of a commercial vehicle. Through the cooperation of an energized plug and a linkage limiting structure, when the energized plug abuts against the wiring part of the brake disc, the linkage limiting structure slides inward, and the wiring column contracts inward synchronously, so that the energized plug fits with the wiring part. When the brake disc vibrates and causes the displacement of the energized plug, the linkage limiting structure extends outward to abut against the surface of the brake disc and drives the wiring column to move downward to maintain electrical connection, improving the stability of the electrical connection between the energized plug and the brake disc.

[0021] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0022] To make the above objectives, features, and advantages of the present invention more obvious and understandable, specific preferred embodiments are hereby cited and, in conjunction with the accompanying drawings, are described in detail as follows. Description of the Drawings

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 A three-dimensional view of the test device for an EMB of a commercial vehicle provided by an embodiment of the present disclosure; Figure 2 A three-dimensional view of the energizing assembly provided by an embodiment of the present disclosure; Figure 3 A three-dimensional view of the linkage limiting structure and the energized plug provided by an embodiment of the present disclosure; Figure 4 A three-dimensional view of the clamping plate and the wiring column provided by an embodiment of the present disclosure; Figure 5 A schematic diagram of the state where the clamping plate abuts against the side wall of the groove of the wiring part of the brake disc provided by an embodiment of the present disclosure; Figure 6 A schematic diagram of the state where the clamping plate abuts against the surface of the brake disc provided by an embodiment of the present disclosure; Figure 7 A three-dimensional view of the detection assembly provided by an embodiment of the present disclosure. In the figure: 1. Support base; 2. Detection Component; 21. Fixed Plate; 22. Driving Cylinder; 23. Detection Probe; 24. Adjusting Plate; 25. Adjusting Column; 3. Power-on Component; 30. Lifting Driving Mechanism; 31. Power-on Plug Connector; 32. Terminal; 33. Guide Groove; 34. Positioning Cavity; 35. Positioning Ring; 36. Return Spring; 4. Linkage Limiting Structure; 40. Clamping Plate; 41. Limiting Opening; 42. Inclined Plane; 43. Guiding Surface; 44. Wire Clamping Post; 45. Limiting Groove; 5. Brake Disc; 50. Wiring Portion. Specific Embodiment

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0026] In this document, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, to effectively describe the technical content, the thickness of the components may be exaggerated or reduced.

[0027] In this document, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0028] The terms used herein are only for describing specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless clearly stated otherwise in the context. The terms "comprising", "including", and "having" are inclusive and thus specify the presence of the specified features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as the order of execution. Additional or alternative steps may be employed.

[0029] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific feature, structure, or characteristic after the phrase can be included in at least one embodiment of the present disclosure. Thus, a specific feature, structure, or characteristic can be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0030] It has been found through research that in the related art, the brake disc is horizontally placed on the detection table, the power-on plug is rigidly connected to the wiring part of the brake disc and powered on, and then the temperature rise detection head is brought close to the brake disc to detect the temperature change of the brake disc in real time.

[0031] During the power-on heating test of the brake disc, local high temperatures (above 300 °C) will be generated on the brake disc, and significant temperature gradients will be formed in the non-contact area due to air convection. The anisotropy of the material's coefficient of thermal expansion leads to an imbalance in structural stress, causing the brake disc to vibrate. This vibration has inherent characteristics, forming a positive feedback cycle of "temperature rise → deformation → vibration → increased temperature rise"; and the vibration of the brake disc affects the electrical connection stability with the power-on plug.

[0032] Therefore, how to avoid the deterioration of the connection stability with the power-on plug caused by the vibration of the brake disc is a technical problem that urgently needs to be solved in the art.

[0033] Regarding the defects of the above solutions and the reasons for their occurrence, they are all the results obtained by the inventors through practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed in this disclosure by the present disclosure should all be the contributions made by the inventors during the process of this disclosure.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0036] As Figures 1 to 7As shown, at least one embodiment provides a test device for an EMB of a commercial vehicle, including: a support base 1, which is fixed on a workbench and is adapted to support a brake disc; a detection component 2, which is arranged on one side of the support base 1 and is used for detecting the temperature of the brake disc. The detection component 2 is arranged on the side of the support base 1 away from the power-on component 3, and the detection component 2 is adapted to detect the temperature rise condition of the brake disc in real time. The power-on component 3 includes a lifting drive mechanism 30 and a power-on plug 31 arranged at its movable end. A liftable terminal 32 is arranged in the power-on plug 31. A linkage limit structure 4 is slidably arranged on the outer wall of the power-on plug 31 and is mechanically linked with the terminal 32. When the power-on plug 31 is inserted into the wiring part 50 of the brake disc, the linkage limit structure 4 is squeezed by the groove side wall of the wiring part 50 and contracts inward. The terminal 32 moves upward to make the bottom of the power-on plug 31 abut against the wiring part 50. When the brake disc vibrates and causes the displacement of the power-on plug 31, the linkage limit structure 4 extends outward to abut against the surface of the brake disc and drives the terminal 32 to move downward to maintain the electrical connection. Through the cooperation of the power-on plug 31 and the linkage limit structure 4, when the power-on plug 31 abuts against the wiring part 50 of the brake disc, the linkage limit structure 4 slides inward, and the terminal 32 contracts inward synchronously, so that the power-on plug 31 fits with the wiring part 50. When the brake disc vibrates and causes the displacement of the power-on plug 31, the linkage limit structure 4 extends outward to abut against the surface of the brake disc and drives the terminal 32 to move downward to maintain the electrical connection, improving the stability of the electrical connection between the power-on plug 31 and the brake disc.

[0037] Refer to the attached Figure 4 , the linkage limit structure 4 includes: a clamping plate 40, in which a limit port 41 is opened, and the terminal 32 is arranged to lift in the limit port 41. The clamping plate 40 is adapted to move horizontally relative to the power-on plug 31. Preferably, there are two clamping plates 40, and the two clamping plates 40 are symmetrically arranged on both sides of the outer wall of the power-on plug 31. A slope 42 is arranged on the outer wall of the clamping plate 40. The arrangement of the slope 42 guides the clamping plate 40 to contract and slide inward when the power-on plug 31 is inserted into the groove of the wiring part 50. When the power-on plug 31 is inserted into the wiring part 50 of the brake disc, the slope 42 abuts against the groove side wall of the wiring part 50 to make the clamping plate 40 slide inward. After the clamping plate 40 slides inward, the guiding surface 43 of the clamping plate 40 disengages from the guiding groove 33. At this time, the terminal 32 moves upward under the elastic force of the return spring 36, so that the terminal 32 contracts into the power-on plug 31, making the bottom wall of the power-on plug 31 fit with the groove of the wiring part 50. In this embodiment, the brake disc is an important component in an electro-mechanical braking system (EMB).

[0038] Continue to refer to the attached Figure 4, a guiding groove 33 is formed on one side of the terminal 32 away from the inclined surface 42; a guiding surface 43 is arranged on the side wall of the limiting opening 41 corresponding to the guiding groove 33; wherein, when the clamping plate 40 moves outwards, refer to the attached Figure 6 , in the figure, f represents the outward movement of the clamping plate 40. The guiding surface 43 is inserted into the guiding groove 33 to push the terminal 32 to move downwards, so as to maintain the electrical connection between the terminal 32 and the wiring part 50. When the clamping plate 40 does not contact the groove of the wiring part 50 of the brake disc, the guiding surface 43 is inserted into the guiding groove 33, so that the lower end of the terminal 32 protrudes from the power-on plug 31.

[0039] Refer to the attached Figure 5 , a positioning cavity 34 is formed in the power-on plug 31, and the terminal 32 is arranged to move up and down in the positioning cavity 34; a positioning ring 35 is sleeved on the outer wall of the terminal 32, and the positioning ring 35 is arranged below the guiding groove 33; a return spring 36 is sleeved on the outer wall of the terminal 32, and two ends of the return spring 36 are respectively abutted against the positioning ring 35 and the side wall of the positioning cavity 34; wherein, the return spring 36 is adapted to push the terminal 32 to move upwards. Figure 5 , in the figure, f1 represents the extrusion force for the inward movement of the clamping plate 40, and f2 represents the upward thrust received by the terminal 32.

[0040] Continue to refer to the attached Figure 4 , the limiting opening 41 is rectangular, its opening width is the same as the outer diameter of the terminal 32, and the opening length is not less than 1.5 times the outer diameter of the terminal 32, so that the clamping plate 40 can move horizontally left and right relative to the terminal 32. Two wire clamping columns 44 are symmetrically arranged at the upper end of the clamping plate 40, and the power cord connecting the terminal 32 and the main power supply is wound around the outer wall of the wire clamping column 44. A limiting groove 45 is formed on the wire clamping column 44, and the width of the opening of the limiting groove 45 is greater than the outer diameter of the power cord.

[0041] When the clamping plate 40 moves left and right, the power cord will become loose. The arrangement of the wire clamping column 44 can keep the power cord in a tightened state, avoiding the situation that the power cord becomes loose due to the frequent horizontal left and right movement of the clamping plate 40.

[0042] Refer to the attached Figure 7, the detection component 2 includes: a fixed plate 21 which is vertically arranged on one side of the support base 1; a driving cylinder 22 which is rotatably arranged on the side wall of the fixed plate 21; a detection probe 23 which is arranged at the end of the piston rod of the driving cylinder 22, and the driving cylinder 22 is adapted to drive the detection probe 23 to move towards the support base 1 so that the detection probe 23 abuts against the brake disc. A regulating plate 24 is rotatably arranged on the side wall of the fixed plate 21, and a regulating column 25 is slidably arranged on the regulating plate 24, and the regulating column 25 is bolt-fixed to the fixed plate 21; the driving cylinder 22 is fixed on the side wall of the regulating plate 24; wherein, when the regulating column 25 is in a loosened state, the regulating plate 24 drives the driving cylinder 22 to rotate relative to the fixed plate 21 to adjust the contact position between the detection probe 23 and the brake disc. The detection probe 23 is a thermal resistance probe, which can quickly reflect the real-time temperature of the brake disc.

[0043] At least one embodiment provides a test device for a commercial vehicle EMB, including: a support base 1 which is horizontally arranged for supporting the brake disc; a power-on plug connector 31 which is arranged on the support base 1 in a lifting manner, a positioning cavity 34 is opened in the power-on plug connector 31, a wiring column 32 is arranged in the positioning cavity 34 in a lifting manner, and the lower end of the wiring column 32 is adapted to protrude from the power-on plug connector 31; a linkage limiting structure 4, including: a clamping plate 40 in which a limiting port 41 is opened, and the wiring column 32 is arranged in the limiting port 41 in a lifting manner; a guiding groove 33 is opened on the outer wall of the wiring column 32; a guiding surface 43 is arranged on the side wall of the limiting port 41 corresponding to the guiding groove 33; wherein, when the power-on plug connector 31 is inserted into the wiring part 50 of the brake disc, the clamping plate 40 is squeezed inward and contracted by the side wall of the groove of the wiring part 50; the wiring column 32 moves upward to make the bottom of the power-on plug connector 31 abut against the wiring part 50; when the vibration of the brake disc causes the displacement of the power-on plug connector 31, the clamping plate 40 extends outward to abut against the surface of the brake disc and drives the wiring column 32 to move downward to maintain the electrical connection.

[0044] At least one embodiment provides a test method for a commercial vehicle EMB, and the test method includes: After the brake disc is placed on the support base 1, the lifting drive mechanism 30 drives the power-on plug connector 31 to move towards the wiring part 50 of the brake disc; when the power-on plug connector 31 is inserted into the wiring part 50 of the brake disc, the linkage limiting structure 4 is squeezed inward and contracted by the side wall of the groove of the wiring part 50; the wiring column 32 moves upward to make the bottom of the power-on plug connector 31 abut against the wiring part 50; when the vibration of the brake disc causes the displacement of the power-on plug connector 31, the linkage limiting structure 4 extends outward to abut against the surface of the brake disc and drives the wiring column 32 to move downward to maintain the electrical connection.

[0045] In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present 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 thus should not be construed as a limitation to the present invention. In addition, terms such as "first", "second" and other numerical terms used herein do not imply an order or sequence unless clearly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above may be referred to as the second element, component, region, layer or section.

[0047] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A test device for EMB for commercial vehicles, characterized in that: include: A support base (1); A detection component (2), which is arranged on one side of the support base (1) and is used to detect the temperature of the brake disc; A power supply component (3) comprising a lifting drive mechanism (30) and a power supply plug connector (31) provided at a movable end thereof, wherein a lifting and lowering terminal post (32) is provided in the power supply plug connector (31); A linkage limiting structure (4) which is slidably disposed on the outer wall of the power plug connector (31) and is mechanically linked to the terminal post (32); When the energized plug connector (31) is inserted into the brake disc wiring portion (50), the linkage limiting structure (4) is squeezed by the side wall of the groove of the wiring portion (50) and contracts inwardly; The terminal post (32) moves upward so that the bottom of the power plug connector (31) abuts against the terminal connection portion (50); When the brake disc vibrates and causes the energized plug connector (31) to move, the linkage limit structure (4) extends outward to abut against the surface of the brake disc and drives the terminal post (32) to move downward to maintain the electrical connection.

2. The test device for the EMB for commercial vehicles according to claim 1, characterized in that: The linkage limiting structure (4) comprises: a clamping plate (40) having a limiting opening (41) formed therein, and the terminal post (32) is arranged in a lifting manner in the limiting opening (41); The outer wall of the clamping plate (40) is provided with an inclined surface (42); When the power plug connector (31) is inserted into the brake disc connection portion (50), the inclined surface (42) abuts against the side wall of the groove of the connection portion (50), so that the clamping plate (40) slides inward.

3. The test device for the EMB for commercial vehicles according to claim 2, characterized in that: A guide groove (33) is formed on a side of the terminal post (32) away from the inclined surface (42); A guide surface (43) is provided on the side wall of the limiting opening (41) corresponding to the guide groove (33); When the clamping plate (40) moves outward, the guide surface (43) is inserted into the guide groove (33) to push the terminal post (32) to move downward, thereby maintaining the electrical connection between the terminal post (32) and the terminal portion (50).

4. The test device for the EMB for commercial vehicles according to claim 3, characterized in that: The power plug connector (31) has a positioning cavity (34) formed therein, and the terminal post (32) is arranged in a lifting manner in the positioning cavity (34); A positioning ring (35) is sleeved on the outer wall of the terminal post (32), and the positioning ring (35) is arranged below the guide groove (33); A return spring (36) is sleeved on the outer wall of the terminal post (32), and two ends of the return spring (36) are respectively in contact with the positioning ring (35) and the side wall of the positioning cavity (34); The return spring (36) is suitable for pushing the terminal (32) to move upward.

5. The test device for the EMB for commercial vehicles according to claim 2, characterized in that: The limiting opening (41) is rectangular, its opening width is consistent with the outer diameter of the terminal (32), and its opening length is not less than 1.5 times the outer diameter of the terminal (32).

6. The test device for the EMB for commercial vehicles according to claim 2, characterized in that: Two clamping posts (44) are symmetrically arranged on the upper end of the clamping plate (40), and a power line connecting the terminal post (32) and the main power source is wound around the outer wall of the clamping post (44).

7. The test device for the EMB for commercial vehicles according to claim 6, characterized in that: The wire clamping column (44) is provided with a limiting groove (45), and the groove width of the limiting groove (45) is greater than the outer diameter of the power cord.

8. The test device for the EMB for commercial vehicles according to claim 1, characterized in that: The detection assembly (2) comprises: a fixing plate (21) vertically arranged on one side of the supporting base (1); A driving cylinder (22) rotatably mounted on a side wall of the fixed plate (21); A detection probe (23) is arranged at the end of the piston rod of the driving cylinder (22). The driving cylinder (22) is suitable for driving the detection probe (23) to move in the direction of the support base (1), so that the detection probe (23) abuts against the brake disc.

9. The test device for the EMB for commercial vehicles according to claim 8, characterized in that: An adjusting plate (24) is rotatably provided on the side wall of the fixing plate (21), an adjusting column (25) is slidably provided on the adjusting plate (24), and the adjusting column (25) is fixed to the fixing plate (21) by bolts; The driving cylinder (22) is fixed to the side wall of the adjustment plate (24); When the adjustment column (25) is in a loosened state, the adjustment plate (24) drives the driving cylinder (22) to rotate relative to the fixed plate (21) to adjust the contact position between the detection probe (23) and the brake disc.

10. A test device for EMB for commercial vehicles, characterized in that: include: A support base (1); It is set horizontally to support the brake disc; The power plug connector (31) is arranged on the support base (1) in a lifting manner. A positioning cavity (34) is provided in the power plug connector (31), a terminal post (32) is provided in the positioning cavity (34) for lifting, and the lower end of the terminal post (32) is suitable for protruding out of the power plug connector (31); The linkage limiting structure (4) comprises: a clamping plate (40) having a limiting opening (41) formed therein, and a terminal post (32) being arranged in a lifting manner in the limiting opening (41); The outer wall of the terminal post (32) is provided with a guide groove (33); A guide surface (43) is provided on the side wall of the limiting opening (41) corresponding to the guide groove (33); When the energized plug connector (31) is inserted into the brake disc connection portion (50), the clamping plate (40) is squeezed by the side wall of the groove of the connection portion (50) and contracts inwardly; The terminal post (32) moves upward so that the bottom of the power plug connector (31) abuts against the terminal connection portion (50); When the brake disc vibrates and causes the energized plug connector (31) to move, the clamping plate (40) extends outward to abut against the surface of the brake disc and drives the terminal post (32) to move downward to maintain the electrical connection.

11. The test device for the EMB for commercial vehicles according to claim 10, characterized in that: A positioning ring (35) is sleeved on the outer wall of the terminal post (32), and the positioning ring (35) is arranged below the guide groove (33); A return spring (36) is sleeved on the outer wall of the terminal post (32), and two ends of the return spring (36) are respectively in contact with the positioning ring (35) and the side wall of the positioning cavity (34); The return spring (36) is suitable for pushing the terminal (32) to move upward.

12. A method for testing EMB for commercial vehicles, characterized in that: Using the test device for the EMB for commercial vehicles according to any one of claims 1 to 9, the test method comprises: After the brake disc is placed on the support base (1), the lifting drive mechanism (30) drives the power plug connector (31) to move toward the brake disc wiring portion (50); When the energized plug connector (31) is inserted into the brake disc wiring portion (50), the linkage limiting structure (4) is squeezed by the side wall of the groove of the wiring portion (50) and contracts inwardly; The terminal post (32) moves upward so that the bottom of the power plug connector (31) abuts against the terminal connection portion (50); When the brake disc vibrates and causes the energized plug connector (31) to move, the linkage limit structure (4) extends outward to abut against the surface of the brake disc and drives the terminal post (32) to move downward to maintain the electrical connection.

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