Test Device and Method for EMB of Commercial Vehicle

Abstract

The present invention belongs to the field of detection technology, and particularly relates to a test device and method for an EMB for commercial vehicles. The present invention provides a test device for an EMB for commercial vehicles, comprising: a support base; a detection assembly, which is arranged on one side of the support base and is used for detecting the temperature of the brake disc; a power-on assembly, including a lifting drive mechanism and a power-on plug connector arranged at its movable end, wherein a liftable connection post 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 connection post; wherein, when the power-on plug connector is inserted into the wiring part of the brake disc, the linkage limiting structure is squeezed by the side wall of the groove of the wiring part and contracts inward; the connection post 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 power-on plug connector, the linkage limiting structure extends outward to abut against the surface of the brake disc and drives the connection post to move downward to maintain the electrical connection. The stability of the electrical connection between the power-on plug connector and the brake disc is improved by the linkage limiting structure.

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 an EMB used in commercial vehicles. Background Art

[0002] In the field of vehicle braking system detection, for an EMB (Electromechanical Brake 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 for power-on heating, 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 coefficient of thermal expansion of the material leads to an imbalance in structural stress, resulting in 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 urgently needs to be solved in this field.

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

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

[0008] In a first aspect, the embodiments of the present disclosure provide a test device for an EMB used in commercial vehicles, including:

[0009] A support base;

[0010] A detection component, which is arranged on one side of the support base and is used to detect the temperature of the brake disc;

[0011] A power-on component, including a lifting drive mechanism and a power-on plug connector arranged at its movable end, and a liftable wiring post is arranged in the power-on plug connector;

[0012] 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 post;

[0013] 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 contracts by the side wall of the groove of the wiring part;

[0014] The terminal post moves upward so that the bottom of the energized plug connector abuts against the wiring part;

[0015] When the brake disc vibrates and causes the displacement of the energized plug connector, the linkage limiting structure extends outward to abut against the surface of the brake disc and drives the terminal post to move downward to maintain electrical connection.

[0016] In an optional embodiment, the linkage limiting structure includes: a clamping plate, which is provided with a limiting opening, and the terminal post is arranged to move up and down in the limiting opening;

[0017] A slope is arranged on the outer wall of the clamping plate;

[0018] 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 inward.

[0019] In an optional embodiment, a guiding groove is arranged on one side of the terminal post away from the slope;

[0020] A guiding surface is arranged on the side wall of the limiting opening corresponding to the guiding groove;

[0021] Wherein, when the clamping plate moves outward, the guiding surface is inserted into the guiding groove to push the terminal post downward to maintain the electrical connection between the terminal post and the wiring part.

[0022] In an optional embodiment, a positioning cavity is arranged in the energized plug connector, and the terminal post is arranged to move up and down in the positioning cavity;

[0023] A positioning ring is sleeved on the outer wall of the terminal post, and the positioning ring is arranged below the guiding groove;

[0024] 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;

[0025] Wherein, the return spring is suitable for pushing the terminal post to move upward.

[0026] In an optional embodiment, the limiting opening is rectangular, the opening width is consistent with the outer diameter of the terminal post, and the opening length is not less than 1.5 times of the outer diameter of the terminal post.

[0027] In an optional 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.

[0028] In an optional embodiment, a limiting groove is arranged on the wire clamping post, and the width of the limiting groove is greater than the outer diameter of the power cord.

[0029] In an alternative embodiment, the detection assembly includes: a fixing plate vertically disposed on one side of the support base;

[0030] a driving cylinder rotatably disposed on the side wall of the fixing plate;

[0031] a detection probe disposed at the end of the piston rod of the driving cylinder,

[0032] wherein 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.

[0033] In an alternative embodiment, an adjusting plate is rotatably disposed on the side wall of the fixing plate, an adjusting column is slidably disposed on the adjusting plate, and the adjusting column is bolted to the fixing plate;

[0034] the driving cylinder is fixed to the side wall of the adjusting plate;

[0035] wherein when the adjusting column is in a loosened state, the adjusting plate drives the driving cylinder to rotate relative to the fixing plate to adjust the contact position between the detection probe and the brake disc.

[0036] In an alternative embodiment, the support base is horizontally disposed for supporting the brake disc;

[0037] a power-on plug connector is vertically disposed on the support base,

[0038] a positioning cavity is formed in the power-on plug connector, a wiring column is vertically disposed in the positioning cavity, and the lower end of the wiring column is adapted to protrude from the power-on plug connector;

[0039] a linkage limiting structure includes: a clamping plate having a limiting opening formed therein, and the wiring column is vertically disposed in the limiting opening;

[0040] a guiding groove is formed on the outer wall of the wiring column;

[0041] a guiding surface is disposed on the side wall of the limiting opening corresponding to the guiding groove;

[0042] wherein when the power-on plug connector is inserted into the wiring portion of the brake disc, the clamping plate is squeezed inwardly by the side wall of the groove of the wiring portion and contracts;

[0043] the wiring column moves upward to make the bottom of the power-on plug connector abut against the wiring portion;

[0044] when the brake disc vibrates and causes displacement of the power-on plug connector, the clamping plate extends outwardly to abut against the surface of the brake disc and drives the wiring column to move downward to maintain electrical connection.

[0045] In an alternative embodiment, a positioning ring is sleeved on the outer wall of the wiring column, and the positioning ring is disposed below the guiding groove;

[0046] A reset spring is sleeved on the outer wall of the terminal post, and two ends of the reset spring are respectively abutted against the positioning ring and the side wall of the positioning cavity;

[0047] Wherein, the reset spring is adapted to push the terminal post to move upward.

[0048] In a second aspect, an embodiment of the present disclosure further provides a test method for an EMB for commercial vehicles, and the detection method includes:

[0049] After the brake disc is placed on the support base, the lifting drive mechanism drives the energized plug to move towards the wiring part of the brake disc;

[0050] When the energized plug is inserted into the wiring part of the brake disc, the linkage limit structure is squeezed by the side wall of the groove of the wiring part and contracts inward;

[0051] The upward movement of the terminal post makes the bottom of the energized plug abut against the wiring part;

[0052] When the vibration of the brake disc causes the displacement of the energized plug, the linkage limit structure extends outwards to abut against the surface of the brake disc, and drives the terminal post to move downward to maintain electrical connection.

[0053] The beneficial effects of the present invention are that the present invention provides a test device and method for an EMB for commercial vehicles. Through the cooperation of the energized plug and the linkage limit structure, when the energized plug abuts against the wiring part of the brake disc, the linkage limit structure slides inward, and the terminal post contracts inward synchronously, so that the energized plug fits with the wiring part; and when the vibration of the brake disc causes the displacement of the energized plug, the linkage limit structure extends outwards to abut against the surface of the brake disc, and drives the terminal post to move downward to maintain electrical connection, improving the stability of the electrical connection between the energized plug and the brake disc.

[0054] Other features and advantages of the present invention will be described in the following description of the specification, and part of them will become obvious from the description of 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 description and the drawings.

[0055] To make the above objectives, features and advantages of the present invention more obvious and understandable, specific preferred embodiments are hereby given, and in conjunction with the accompanying drawings, the following detailed description is provided. Description of the Drawings

[0056] In order 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 technical solutions. Obviously, the following drawings 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.

[0057] Figure 1 Stereogram of the test device for EMB of commercial vehicle provided by the embodiment of the present disclosure;

[0058] Figure 2 Stereogram of the energizing component provided by the embodiment of the present disclosure;

[0059] Figure 3 Stereogram of the linkage limiting structure and the energizing plug provided by the embodiment of the present disclosure;

[0060] Figure 4 Stereogram of the clamping plate and the terminal provided by the embodiment of the present disclosure;

[0061] Figure 5 Schematic diagram of the contact state between the clamping plate and the side wall of the groove of the wiring part of the brake disc provided by the embodiment of the present disclosure;

[0062] Figure 6 Schematic diagram of the contact state between the clamping plate and the surface of the brake disc provided by the embodiment of the present disclosure;

[0063] Figure 7 Stereogram of the detection component provided by the embodiment of the present disclosure.

[0064] In the figure:

[0065] 1. Support base;

[0066] 2. Detection component; 21. Fixed plate; 22. Driving cylinder; 23. Detection probe; 24. Adjusting plate; 25. Adjusting column;

[0067] 3. Energizing component; 30. Lifting driving mechanism; 31. Energizing plug; 32. Terminal; 33. Guide groove; 34. Positioning cavity; 35. Positioning ring; 36. Return spring;

[0068] 4. Linkage limiting structure; 40. Clamping plate; 41. Limiting port; 42. Inclined surface; 43. Guide surface; 44. Wire clamping column; 45. Limiting groove;

[0069] 5. Brake disc; 50. Wiring part. Detailed implementation manners

[0070] For the purpose of making 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. Obviously, 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 making creative efforts shall fall within the scope of protection of the present invention.

[0071] In this document, when it is mentioned that a first component is located on a second component, this may mean that the first component can be directly formed on the second component, or a third component can be interposed between the first component and the second component. Additionally, in the drawings, for the purpose of effectively describing the technical content, the thickness of components may be exaggerated or reduced.

[0072] In this document, example 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.

[0073] 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 it is 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 preclude 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 an order of performance. Additional or alternative steps may be employed.

[0074] 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 following the phrase may be included in at least one embodiment of the present disclosure. Thus, a specific feature, structure, or characteristic may 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, the terms "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 the terms "example," "exemplary," etc., is intended to present concepts in a concrete manner.

[0075] 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.

[0076] During the test of the brake disc heating up when powered on, local high temperatures (above 300 °C) will be generated on the brake disc, and significant temperature gradients will be formed in the non-contact areas due to the influence of 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 loop of "temperature rise → deformation → vibration → increased temperature rise"; and the vibration of the brake disc affects the electrical connection stability with the powered plug connector.

[0077] Therefore, how to avoid the deterioration of the connection stability with the powered plug connector caused by the vibration of the brake disc is a technical problem that urgently needs to be solved in this field.

[0078] Regarding the defects of the above solutions and the reasons for their occurrence, they are all the results obtained by the inventors after practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed in this disclosure by the present disclosure should both be the contributions made by the inventors during the process of this disclosure.

[0079] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0080] The following will, with reference to the 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.

[0081] 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 suitable for supporting 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 suitable for detecting the temperature rise condition of the brake disc in real time; a power-on component 3, including a lifting drive mechanism 30 and a power-on plug 31 arranged at its movable end, and a liftable terminal 32 is arranged in the power-on plug 31; a linkage limit structure 4, which is slidably arranged on the outer wall of the power-on plug 31 and is mechanically linked with the terminal 32; wherein, 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 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; and 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 electrical connection, improving the stability of the electrical connection between the power-on plug 31 and the brake disc.

[0082] Reference appendix Figure 4 As shown, the linkage limit structure 4 includes: a clamping plate 40, in which a limit opening 41 is formed, and the terminal 32 is arranged to lift in the limit opening 41; the clamping plate 40 is suitable for moving 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. Among them, 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, and the bottom wall of the power-on plug 31 fits 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).

[0083] Continue to refer to appendix Figure 4, a guide groove 33 is formed on one side of the terminal 32 away from the inclined surface 42; a guide surface 43 is provided on the side wall of the limit opening 41 corresponding to the guide groove 33; wherein, when the clamping plate 40 moves outward, refer to the attached Figure 6 , in the figure, f represents the outward movement of the clamping plate 40. The guide surface 43 is inserted into the guide groove 33 to push the terminal 32 downward 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 guide surface 43 is inserted into the guide groove 33 so that the lower end of the terminal 32 protrudes from the power-on plug 31.

[0084] 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 guide groove 33; a return spring 36 is sleeved on the outer wall of the terminal 32, and both ends of the return spring 36 are abutted against the positioning ring 35 and the side wall of the positioning cavity 34 respectively; wherein, the return spring 36 is adapted to push the terminal 32 upward. Figure 5 , f1 represents the inward extrusion force received by the clamping plate 40, and f2 represents the upward thrust received by the terminal 32.

[0085] Continue to refer to the attached Figure 4 , the limit 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 limit groove 45 is formed on the wire clamping column 44, and the width of the opening of the limit groove 45 is greater than the outer diameter of the power cord.

[0086] When the clamping plate 40 moves left and right, it will cause the power cord to become loose. The setting of the wire clamping column 44 can keep the power cord in a tightened state, avoiding the situation of the power cord becoming loose due to the frequent horizontal left and right movement of the clamping plate 40.

[0087] Refer to the attached Figure 7, the detection component 2 includes: a fixing plate 21 vertically arranged on one side of the support base 1; a driving cylinder 22 rotatably arranged on the side wall of the fixing plate 21; a detection probe 23 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 fixing 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 fixing 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 fixing 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.

[0088] 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, a limiting port 41 is opened therein, 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 and contracted inward 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 brake disc vibrates and 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.

[0089] At least one embodiment provides a test method for a commercial vehicle EMB, and the test method includes:

[0090] 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 and contracted inward 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 brake disc vibrates and 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.

[0091] 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 can be understood according to specific situations.

[0092] 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. It 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 of the present invention. In addition, terms such as "first", "second", and other numerical terms used herein do not imply an order or sequence unless explicitly 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.

[0093] 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 the present invention. The technical scope of the present 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 an EMB of a commercial vehicle, characterized in that, Comprising: A support base (1); A detection component (2) which is arranged on one side of the support base (1) for detecting the temperature of the brake disc; An energization component (3) including a lifting drive mechanism (30) and an energization plug (31) provided at its movable end, and a liftable terminal (32) is provided in the energization plug (31); A linkage limiting structure (4) which is slidably arranged on the outer wall of the energization plug (31) and is mechanically linked with the terminal (32); Wherein, when the energization plug (31) is inserted into the brake disc wiring part (50), the linkage limiting 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 energization plug (31) abut against the wiring part (50); When the brake disc vibrates and causes displacement of the energization plug (31), the linkage limiting structure (4) extends outward to abut against the surface of the brake disc and drives the terminal (32) to move downward to maintain electrical connection; The linkage limiting structure (4) includes: a clamping plate (40) with a limiting opening (41) formed therein, and the terminal (32) is arranged to move up and down in the limiting opening (41); A slope (42) is arranged on the outer wall of the clamping plate (40); Wherein, when the energization plug (31) is inserted into the brake disc wiring part (50), the slope (42) abuts against the groove side wall of the wiring part (50) to make the clamping plate (40) slide inward; A guiding groove (33) is formed on one side of the terminal (32) away from the slope (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 outward, the guiding surface (43) is inserted into the guiding groove (33) to push the terminal (32) to move downward to maintain the electrical connection between the terminal (32) and the wiring part (50).

2. The test device for EMB of commercial vehicle according to claim 1, characterized in that A positioning cavity (34) is formed in the energization 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 the two ends of the return spring (36) respectively abut 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 upward.

3. The test device for EMB of commercial vehicle according to claim 1, characterized in that 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).

4. The test device for EMB of commercial vehicle according to claim 1, characterized in that 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 columns (44).

5. The test device for EMB of commercial vehicle according to claim 4, characterized in that A limiting groove (45) is formed in the wire clamping post (44), and the width of the opening of the limiting groove (45) is greater than the outer diameter of the power cord.

6. The test device for the EMB of a commercial vehicle according to claim 1, wherein the detection assembly (2) includes: a fixing plate (21) vertically arranged on one side of the support base (1); a driving cylinder (22) rotatably arranged on the side wall of the fixing plate (21); a detection probe (23) 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.

7. The test device for the EMB of a commercial vehicle according to claim 6, wherein an adjusting plate (24) is rotatably arranged on the side wall of the fixing plate (21), an adjusting column (25) is slidably arranged on the adjusting plate (24), and the adjusting column (25) is bolt-fixed to the fixing plate (21); the driving cylinder (22) is fixed on the side wall of the adjusting plate (24); wherein when the adjusting column (25) is in a loosened state, the adjusting plate (24) drives the driving cylinder (22) to rotate relative to the fixing plate (21) to adjust the contact position between the detection probe (23) and the brake disc.

8. A test method for an EMB used in a commercial vehicle, characterized in that, Using the test device for the EMB of a commercial vehicle according to any one of claims 1-7, 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 (31) to move towards the brake disc wiring part (50); When the power-on plug (31) is inserted into the brake disc wiring part (50), the linkage limiting structure (4) is squeezed by the side wall of the groove of the wiring part (50) and contracts inward; the wiring post (32) moves upward so that the bottom of the power-on plug (31) abuts against the wiring part (50); When the displacement of the power-on plug (31) is caused by the vibration of the brake disc, the linkage limiting structure (4) extends outwards to abut against the surface of the brake disc and drives the wiring post (32) to move downward to maintain the electrical connection.

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