Brake system test platform

Abstract

The invention provides a brake system test platform. The brake system test platform comprises a rotating shaft and an inertia assembly. The rotating shaft is provided with a mounting hole, and the extension direction of the mounting hole is perpendicular to the axial direction of the rotating shaft. The inertia assembly comprises a first flywheel, a second flywheel and a connecting assembly, the first flywheel and the second flywheel are in the same semicircular plate shape, semicircular through holes in the same shape are formed in the circle center positions of the first flywheel and the second flywheel, and the rotating shaft is sleeved with the first flywheel and the second flywheel through the semicircular through holes. Wherein the first flywheel and the second flywheel are spliced to form a circular plate-shaped structure with a circular through hole, and the connecting assembly penetrates through the mounting hole and is detachably connected with the first flywheel and the second flywheel.

Description

Technical Field

[0001] This disclosure relates to the field of urban rail transit vehicle technology, and in particular to a braking system testing platform. Background Technology

[0002] The braking system of urban rail transit vehicles is a key device for ensuring their safe and efficient operation. Related technologies use a braking system testing platform to simulate data such as braking force and inertial force during vehicle operation to determine whether the braking performance of the system meets standards. One method involves using flywheel rotation to store energy and provide the wheels with an inertial force equivalent to that of the vehicle moving forward. However, the fixed number of flywheels makes it difficult to adjust the provided inertial force. Summary of the Invention

[0003] To address at least one of the aforementioned and other technical problems in the prior art, embodiments of this disclosure provide a braking system test platform, including a rotating shaft and an inertial assembly. The rotating shaft has mounting holes extending perpendicularly to the axial direction of the rotating shaft. The inertial assembly includes a first flywheel, a second flywheel, and a connecting assembly. Both the first and second flywheels are identical semi-circular plates, and both have identical semi-circular through holes at their centers. The first and second flywheels are fitted onto the rotating shaft through these semi-circular through holes. The first and second flywheels are joined to form a circular plate structure with circular through holes. The connecting assembly passes through the mounting holes and is detachably connected to both the first and second flywheels.

[0004] Optionally, the mounting holes are spaced apart along the axial direction of the shaft, all for the purpose of accommodating the installation of inertial components.

[0005] Optionally, the connecting assembly includes a first connecting rod and a second connecting rod. The first connecting rod is located within the mounting hole and extends parallel to the extension direction of the mounting hole. One end of the first connecting rod is fixedly connected to the second flywheel, and a groove is formed on the side wall of the first connecting rod. The second connecting rod includes a body and a shaft. The body extends along a direction perpendicular to the plane normal of the first flywheel and passes through the first flywheel. The shaft extends parallel to the extension direction of the body and passes through the interior of the body. The end of the shaft located within the mounting hole has a mating protrusion that engages with the groove.

[0006] Optionally, the first connecting rod has a slot located at the end of the groove away from the second flywheel. A mating rod that engages with the slot is fixed in place by a protrusion.

[0007] Optionally, the second connecting rod also includes a flange. The flange is fixed to the end of the body that extends from inside the first flywheel and is located away from the mounting hole. The plane normal of the flange is parallel to the extension direction of the body.

[0008] Optionally, the second connecting rod also includes a rotating rod and a damper. The rotating rod is fixed to the end of the shaft that extends from the interior of the body and the flange. The shaft and the body are connected to each other by the damper. Rotating the rotating rod causes the shaft and the mating protrusion to rotate axially around the shaft, and the damper prevents the shaft, the mating protrusion, and the rotating rod from rotating under non-external force.

[0009] Optionally, the second connecting rod also includes a groove and a slider. The groove is formed on the flange, and the cross-sectional shape of the groove is arc-shaped. The slider is fixedly connected to the side of the rotating rod near the flange. When the rotating rod rotates, it drives the slider to slide on the groove.

[0010] Optionally, an indicator is fixedly connected to the side of the rotating rod away from the flange, and the center of the indicator is on the same straight line as the center of the slider. The indicator is used to indicate the position of the slider on the groove.

[0011] Optionally, the connecting assembly also includes a connecting piece and a spring. The connecting piece is fixed to the side wall of the main body located within the mounting hole. The two ends of the spring are fixedly connected to the connecting piece and the first flywheel, respectively, and extend in a direction parallel to the extension direction of the mounting hole.

[0012] Optionally, the braking system test platform also includes a test bench, a braking device, a bracket, a motor, and a wheel. The test bench is horizontally arranged. The braking device is detachably mounted on the top surface of the test bench. The bracket is fixedly mounted on the top surface of the test bench. The motor is fixedly mounted on the top surface of the bracket. A plug with a threaded groove is fixed at the center of the wheel. One axial end of the rotating shaft is connected to the output shaft of the motor, and the other axial end of the rotating shaft is fixedly connected to a mounting block. The mounting block has a slot on the side away from the rotating shaft, and a fastening bolt is threaded onto the mounting block. The plug is inserted into the slot, and the fastening bolt is screwed into the threaded groove to connect the wheel to the rotating shaft.

[0013] According to the braking system testing platform provided in this disclosure, on the one hand, a circular flywheel is formed by splicing a first flywheel and a second flywheel, and a circular through hole is formed at the center of the circular flywheel after splicing through a semi-circular through hole, so that the circular flywheel is sleeved on the rotating shaft. The circular flywheel can store rotational inertia when it rotates with the rotating shaft. In addition, the mounting hole opened on the rotating shaft and the connecting component passing through the mounting hole are combined to achieve a stable connection between the circular flywheel and the rotating shaft. Therefore, the circular flywheel can be driven to rotate synchronously by the rotating shaft, simulating the inertial force when urban rail transit vehicles are running. Furthermore, the circular structure after splicing the first flywheel and the second flywheel helps to avoid the vibration hazards caused by structural disassembly when the circular flywheel rotates, and improves the stability of the rotating shaft and the circular flywheel during the braking system test. On the other hand, by detachably connecting the connecting components to the first and second flywheels respectively, the first and second flywheels can be quickly installed and removed. The number of the first and second flywheels can be adjusted by adjusting the number of mounting holes and connecting components. The installation or removal of a single circular flywheel can be completed by operating the connecting components at a single mounting hole, which improves the convenience of increasing or decreasing the number of circular flywheels. Therefore, the braking system test platform provided by this disclosure facilitates the adjustment of inertial force and helps to solve the problem of inconvenient inertial force adjustment when traditionally setting up an integral flywheel. Attached Figure Description

[0014] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0015] Figure 1 This schematic diagram illustrates the overall structure of a braking system test platform according to an embodiment of the present disclosure;

[0016] Figure 2 A schematic cross-sectional view of a rotating shaft according to an embodiment of the present disclosure is shown;

[0017] Figure 3 This illustration schematically depicts an embodiment according to the present disclosure. Figure 2 Enlarged view of section A;

[0018] Figure 4 A schematic diagram of the structure of the second connecting rod according to an embodiment of the present disclosure is shown.

[0019] Figure 5 A schematic diagram of the connection structure of the wheel body according to an embodiment of the present disclosure is shown.

[0020] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0021] 1-Test stand; 2-Brake device; 3-Bracket; 4-Motor; 5-Shaft; 51-Mounting hole; 6-Inertia assembly; 61-First flywheel; 62-Second flywheel; 63-First connecting rod; 64-Matching lever; 65-Matching protrusion; 66-Body part; 67-Connecting piece; 68-Spring; 69-Shaft; 610-Rotating rod; 611-Flange; 612-Slider; 613-Indicator; 614-Slide groove; 7-Wheel body; 8-Insertion block; 81-Threaded groove; 9-Mounting block; 10-Fasting bolt. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0023] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0024] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0025] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0026] Figure 1 The schematic diagram illustrates the overall structure of a braking system test platform according to an embodiment of the present disclosure. Figure 2 A schematic cross-sectional view of a rotating shaft according to an embodiment of the present disclosure is shown. Figure 3 This illustration schematically depicts an embodiment according to the present disclosure. Figure 2 Enlarged view of part A in the middle.

[0027] like Figures 1-3 As shown, this disclosure provides a braking system test platform, including a rotating shaft 5 and an inertial assembly 6. The rotating shaft 5 has a mounting hole 51, the extension direction of which is perpendicular to the axial direction of the rotating shaft 5. The inertial assembly 6 includes a first flywheel 61, a second flywheel 62, and a connecting assembly. Both the first flywheel 61 and the second flywheel 62 are identical semi-circular plates, and both have identical semi-circular through holes at their centers. The first flywheel 61 and the second flywheel 62 are fitted onto the rotating shaft 5 through the semi-circular through holes. The first flywheel 61 and the second flywheel 62 are joined to form a circular plate structure with circular through holes. The connecting assembly passes through the mounting hole 51 and is detachably connected to the first flywheel 61 and the second flywheel 62 respectively.

[0028] Specifically, the rotating shaft 5 is, but is not limited to, a cylindrical shape. A mounting hole 51 extends through the rotating shaft 5 along its own extension direction. A connecting assembly passes through the mounting hole 51 and connects to a first flywheel 61 and a second flywheel 62 respectively. The first flywheel 61 and the second flywheel 62 are joined together to form a circular flywheel fitted onto the rotating shaft 5. Furthermore, the rotating shaft 5 is driven by the motor 4 to rotate around its own axis, causing the circular flywheel to rotate synchronously. During rotation, the circular flywheel stores rotational inertia based on its own mass and rotational speed. The higher the rotational speed and the greater the mass of the circular flywheel, the greater the stored rotational inertia.

[0029] The diameter of the semi-circular through hole of the first flywheel 61 and the second flywheel 62 is adapted to the diameter of the rotating shaft 5 (gap ≤ 0.2mm), including but not limited to rounding the edge of the semi-circular through hole (e.g., the radius of the rounded corner is 1mm) to reduce stress concentration on the rotating shaft 5 during fitting and rotation.

[0030] In this implementation, on the one hand, a circular flywheel is formed by splicing the first flywheel 61 and the second flywheel 62, and a circular through hole is formed at the center of the circular flywheel after splicing through the semi-circular through hole, so that the circular flywheel is sleeved on the rotating shaft 5. The circular flywheel can store rotational inertia when it rotates with the rotating shaft 5. Furthermore, combined with the mounting hole 51 opened on the rotating shaft 5 and the connecting component passing through the mounting hole 51, a stable connection between the circular flywheel and the rotating shaft 5 is achieved. Therefore, the circular flywheel can be driven to rotate synchronously by the rotating shaft 5, simulating the inertial force when the urban rail transit vehicle is running. Moreover, the circular structure after splicing the first flywheel 61 and the second flywheel 62 helps to avoid the vibration hazards caused by the structural disassembly when the circular flywheel rotates, and improves the stability of the rotating shaft 5 and the circular flywheel during the braking system test. On the other hand, by detachably connecting the connecting components to the first flywheel 61 and the second flywheel 62 respectively, the first flywheel 61 and the second flywheel 62 can be quickly installed and removed. The number of the first flywheel 61 and the second flywheel 62 installed can be adjusted by adjusting the number of mounting holes 51 and the number of connecting components. The installation or removal of a single circular flywheel can be completed by operating the connecting components at a single mounting hole 51, which improves the convenience of increasing or decreasing the number of circular flywheels. Therefore, the braking system test platform provided by this disclosure is convenient for adjusting inertial force and helps to solve the problem of inconvenient inertial force adjustment when setting up an integral flywheel in the past.

[0031] According to the embodiments of this disclosure, the mounting holes 51 are distributed at intervals along the axial direction of the rotating shaft 5, and are all used to accommodate the installation of the inertial assembly 6.

[0032] Specifically, a single mounting hole 51 is used for a single connecting component to pass through and is adapted for the installation of a single first flywheel 61 and a single second flywheel 62. The mounting holes 51 are, but are not limited to, evenly spaced along the axial direction of the rotating shaft 5, and the spacing between two adjacent mounting holes 51 is, but is not limited to, 3-6 times the thickness of the first flywheel 61 or the second flywheel 62 (the dimension of the first flywheel 61 or the second flywheel 62 along the plane normal direction).

[0033] In this embodiment, by providing mounting holes 51 spaced apart along the axial direction of the rotating shaft 5, the number of circular flywheels formed by the first flywheel 61 and the second flywheel 62 mounted on the rotating shaft 5 can be flexibly adjusted, and the distribution position of the circular flywheels on the rotating shaft 5 is also easy to adjust. Furthermore, the spacing between the mounting holes 51 provides operating space for installing or removing the first flywheel 61 and the second flywheel 62, and helps to prevent adjacent circular flywheels from contacting each other during rotation, which is beneficial to improving the stability of the braking system test platform during operation.

[0034] Figure 4 A schematic diagram of the structure of the second connecting rod according to an embodiment of the present disclosure is shown.

[0035] like Figure 4 As shown, the connecting assembly includes a first connecting rod 63 and a second connecting rod. The first connecting rod 63 is located within the mounting hole 51 and extends parallel to the extension direction of the mounting hole 51. One end of the first connecting rod 63 is fixedly connected to the second flywheel 62, and a groove is formed on the side wall of the first connecting rod 63. The second connecting rod includes a body portion 66 and a shaft 69. The body portion 66 extends along a direction perpendicular to the plane normal of the first flywheel 61 and passes through the first flywheel 61. The extension direction of the shaft 69 is parallel to the extension direction of the body portion 66 and passes through the interior of the body portion 66. The end of the shaft 69 located within the mounting hole 51 has a mating protrusion 65 that engages with the groove.

[0036] Specifically, the cross-sectional shape of the first connecting rod 63 includes, but is not limited to, a semi-circular shape. The first connecting rod 63 has an arc surface and a rectangular plane extending along its own extension direction. The rectangular plane is closer to the central axis of the mounting hole 51 than the arc surface. A groove is formed on the rectangular plane of the first connecting rod 63. The connection between the first connecting rod 63 and the second flywheel 62 includes, but is not limited to, welding or integral molding. The extension direction of the groove is parallel to the extension direction of the mounting hole 51. The wall shape of the groove extending along its own extension direction includes, but is not limited to, a rectangle or a "U" shape.

[0037] The cross-sectional shape of the shaft 69 matches the shape of the hollow portion of the body 66. The cross-sectional shape of the body 66 includes, but is not limited to, a hollow square, and the cross-sectional shape of the shaft 69 includes, but is not limited to, a solid circle. The diameter of the circular cross-section of the shaft 69 includes, but is not limited to, 0.4-0.7 times the side length of the square outer contour of the body 66. The centerline extending along the body 66 coincides with the centerline of the semi-circular plate structure of the first flywheel 61, and the centerline extending along the shaft 69 coincides with the centerline extending along the body 66. The body 66 and shaft 69 are movable relative to the first flywheel 61 and the second flywheel 62 along their respective extending directions.

[0038] The end face of the shaft 69 located within the mounting hole 51 and the end face of the body 66 located within the mounting hole 51 are on the same plane. The mating protrusion 65 is configured as a block structure that partially adapts to the internal space of the groove. The mating protrusion 65 may include, but is not limited to, being a hexahedral structure, including two opposing end faces and four side faces. One end face of the mating protrusion 65 is flat, and this flat surface faces and is fixedly connected to the end face of the shaft 69 located within the mounting hole 51. The connection method includes, but is not limited to, welding, bolt connection, or integral molding, and the area of ​​this end face of the mating protrusion 65 is larger than the area of ​​the end face of the body 66 located within the mounting hole 51.

[0039] In this embodiment, by partially embedding the protrusion 65 into the groove, and because the body 66 and shaft 69 can move relative to the first flywheel 61 and the second flywheel 62 along their own extending direction, the protrusion 65 can slide on the groove along its extending direction. Specifically, when the body 66 and shaft 69 located within the mounting hole 51 move away from the second flywheel 62 along their own extending direction, the protrusion 65 is driven to slide towards the end of the groove that is close to the first flywheel 61. When the protrusion 65 slides to abut against this end of the groove, further movement of the body 66 and shaft 69 along this moving direction is restricted.

[0040] According to an embodiment of this disclosure, the first connecting rod 63 has a slot located at the end of the groove away from the second flywheel 62. A mating rod 64, which engages with the slot, is fixed to the mating protrusion 65.

[0041] Specifically, the slot is located at the end of the groove in the first connecting rod 63 that is away from the second flywheel 62 (but close to the first flywheel 61). The extension direction of the slot is parallel to the extension direction of the groove. The cross-sectional shape of the slot includes, but is not limited to, a square, a rectangle, or a circle. The mating rod 64 is located within the groove, and its extension direction is parallel to the extension direction of the groove. The cross-sectional shape of the mating rod 64 is consistent with the cross-sectional shape of the slot. Furthermore, one end of the mating rod 64 is fixedly connected to the mating protrusion 65 by, but is not limited to, welding or integral molding.

[0042] In this embodiment, when a portion of the mating protrusion 65 is embedded in the groove, and the mating protrusion 65 slides to abut against the end of the groove that is close to the first flywheel 61, the mating lever 64 is also driven to insert into the slot at this end of the groove along its own extension direction. This further restricts the relative movement of the two abutting surfaces of the mating protrusion 65 and the end of the groove along the direction perpendicular to the normal of the abutting surfaces, under the condition that the movement of the body part 66 and the shaft 69 relative to the second flywheel 62 along its own extension direction is restricted in the mounting hole 51. This helps to avoid the failure of movement restriction on the body part 66 and the shaft 69 caused by the mating protrusion 65 disengaging from the inside of the groove, and is conducive to improving the stability of the abutting state of the mating protrusion 65 and the end of the groove.

[0043] According to an embodiment of this disclosure, the second connecting rod further includes a flange 611. The flange 611 is fixed to one end of the body portion 66 that extends from the interior of the first flywheel 61 and is located away from the mounting hole 51. The normal direction of the plane of the flange 611 is parallel to the extending direction of the body portion 66. The second connecting rod also includes a rotating rod 610 and a damper. The rotating rod 610 is fixed to one end of the shaft 69 that extends from the interior of the body portion 66 and the flange 611. The shaft 69 and the body portion 66 are interconnected by the damper. Rotating the rotating rod 610 causes the shaft 69 and the mating protrusion 65 to rotate axially around the shaft 69, and the damper prevents the shaft 69, the mating protrusion 65, and the rotating rod 610 from rotating under non-external force.

[0044] Specifically, the flange 611 is provided with a connecting groove. The cross-sectional shape of the flange 611 includes, but is not limited to, a circle with an opening, wherein the connecting groove is formed by extending along the plane normal direction of the flange 611 and penetrating the flange 611 through the opening. The cross-sectional shape of the connecting groove is consistent with the cross-sectional shape of the body portion 66, and the end of the body portion 66 that protrudes from the inside of the first flywheel 61 (the end of the body portion 66 that is farther away from the mounting hole 51) is embedded in the connecting groove, wherein the sidewall of the connecting groove faces and is fixedly connected to the sidewall of the body portion 66, and the fixed connection method includes, but is not limited to, welding. In addition, including but not limited to, rounding the edges of the connecting groove to reduce stress concentration on the body portion 66 when it is embedded.

[0045] The extending direction of the rotating rod 610 is perpendicular to the extending direction of the body portion 66. The cross-sectional shape of the rotating rod 610 includes, but is not limited to, a square. The shaft 69 extends along its own extending direction away from the second flywheel 62, passes through the end of the body portion 66 located in the connecting groove of the flange 611, and is fixedly connected to the middle of the side wall of the rotating rod 610, wherein the fixed connection method includes, but is not limited to, welding or bolt connection.

[0046] The damping includes, but is not limited to, a block structure with a circular cross-section, whose extension direction is parallel to the extension direction of the shaft 69. The inner diameter of the damper is the same as the outer diameter of the shaft 69, and the outer diameter of the damper is the same as the inner diameter of the body portion 66. The damper is located in the gap between the shaft 69 and the body portion 66 and is fitted onto the shaft 69. The inner surface of the damper is in contact with the outer surface of the shaft 69, and the outer surface of the damper is in contact with the inner surface of the body portion 66. The damping includes, but is not limited to, the use of nitrile rubber damping.

[0047] In this implementation, firstly, by providing a damping connection between the shaft 69 and the body 66, the shaft 69 and the body 66 can move together relative to the first flywheel 61 and the second flywheel 62 along their own extending directions, and can also rotate relative to each other under the action of external force. Secondly, when the part of the structure of the mating protrusion 65 is embedded in the groove, and the mating protrusion 65 slides on the groove, when the body 66 moves closer to the second flywheel 62 along its own extending direction, the flange 611 abuts against the first flywheel 61, thereby restricting the continued movement of the body 66 in this direction. This helps to prevent the body 66 from coming off the first flywheel 61, and, together with the connection state of the mating protrusion 65 embedded in the groove, promotes the stable splicing of the first flywheel 61 and the second flywheel 62 and their fitting onto the rotating shaft 5. Then, when the mating protrusion 65 abuts against the end of the groove near the first flywheel 61, the driving body 66 and shaft 69 move closer to the second flywheel 62 along their own extending direction. The mating protrusion 65 is driven to slide towards the end of the groove near the second flywheel 62. At the same time, by applying an external force to the rotating rod 610, the rotating rod 610 is driven to rotate axially around the shaft 69. The shaft 69 is driven to rotate synchronously, causing the mating protrusion 65 on the shaft 69 to rotate out of the groove, thus helping to disengage the first flywheel 61 and the second flywheel 62 from the rotating shaft 5. Therefore, this arrangement allows the first flywheel 61 and the second flywheel 62 to be securely connected to the rotating shaft 5 while also being easy to disassemble.

[0048] According to an embodiment of this disclosure, the second connecting rod further includes a groove 614 and a slider 612. The groove 614 is formed on the flange 611, and the cross-sectional shape of the groove 614 is arc-shaped. The slider 612 is fixedly connected to the side of the rotating rod 610 near the flange 611. When the rotating rod 610 rotates, it causes the slider 612 to slide on the groove 614. An indicator 613 is fixedly connected to the side of the rotating rod 610 away from the flange 611, and the center of the indicator 613 is on the same straight line as the center of the slider 612. The indicator 613 is used to indicate the position of the slider 612 on the groove 614.

[0049] Specifically, the slider 612 is a block-shaped structure fixed to the side of the rotating rod 610 near the flange 611, and its size is adapted to the groove 614, sliding synchronously with the rotating rod 610. The slider 612 is not limited to being a cube. The connection method between the slider 612 and the rotating rod 610 includes, but is not limited to, welding or integral molding.

[0050] The groove 614 is an arc-shaped groove formed on the side of the flange 611 facing the rotating rod 610, and its curvature is consistent with the trajectory of the rotating rod 610 driving the slider 612 to rotate. When the slider 612 is at one end of the groove 614, the mating protrusion 65 disengages from the inside of the groove. As the slider 612 slides from one end of the groove 614 to the other end, the mating protrusion 65 rotates synchronously and continuously approaches the groove. When the slider 612 reaches the other end of the groove 614, the mating protrusion 65 rotates into the groove, and the mating locking rod 64 on the mating protrusion 65 faces the locking groove inside the groove. The rotation angle of the mating protrusion 65 is, but is not limited to, 90°, and the length of the groove 614 matches the rotation angle of the mating protrusion 65.

[0051] The centers of the indicator 613, slider 612, and mating lever 64 are all located on the same straight line. The indicator 613 may be, but is not limited to, a strip-shaped structure, with its length direction perpendicular to the collinear direction of the indicator 613, slider 612, and mating lever 64. Furthermore, the connection method between the indicator 613 and the rotating rod 610 may include, but is not limited to, welding, bolting, or integral molding.

[0052] In this embodiment, on the one hand, when the part of the structure of the mating protrusion 65 is embedded in the groove and the mating protrusion 65 slides on the groove, when the shaft 69 moves closer to the second flywheel 62 along its own extension direction, the slider 612 of the rotating rod 610 abuts against the groove 614 on the flange 611, thereby restricting the continued movement of the shaft 69 in this direction, helping to prevent the shaft 69 from coming out of the body part 66, which is beneficial to ensuring the stability of the mating protrusion 65 embedded in the groove, and further strengthening the restrictive effect of the flange 611 on the body part 66. Therefore, it is beneficial to improve the stability of the first flywheel 61 and the second flywheel 62 on the rotating shaft 5. On the other hand, since both the indicator 613 and the slider 612 rotate together with the rotating rod 610, it is easy to see and determine whether the mating protrusion 65 has rotated into or out of the groove. Furthermore, when the mating protrusion 65 is already inside the groove, it helps to determine whether the mating latch 64 set on the mating protrusion 65 has reached the slot position, improving the convenience and reliability of the operation process and helping to reduce the problem of insufficient or excessive rotation angle. At the same time, the slide 614 limits the maximum rotation angle of the rotating rod 610, which helps to prevent damage to the damping due to excessive rotation of the shaft 69. This not only improves the accuracy of operation, but also protects the components, which helps to ensure the service life and test reliability of the braking system test platform.

[0053] According to an embodiment of this disclosure, the connecting assembly further includes a connecting piece 67 and a spring 68. The connecting piece 67 is fixed to the side wall of the body portion 66 located within the mounting hole 51. The two ends of the spring 68 are fixedly connected to the connecting piece 67 and the first flywheel 61, respectively, and its extension direction is parallel to the extension direction of the mounting hole 51.

[0054] Specifically, the connecting piece 67 may include, but is not limited to, being flat, with its plane normal direction parallel to the extension direction of the spring 68. The connecting piece 67 may include, but is not limited to, having one end welded to the side wall of the main body 66. Identical rings are fixed at the positions where the connecting piece 67 and the first flywheel 61 face each other, and both ends of the spring 68 are respectively inserted into and fixed to the rings.

[0055] When the first flywheel 61 and the second flywheel 62 are both sleeved on the rotating shaft 5 and spliced ​​together, the first connecting rod 63 fixed to the second flywheel 62 passes through the mounting hole 51, and the second connecting rod passing through the first flywheel 61 also passes through the mounting hole 51. When the mating protrusion 65 of the second connecting rod abuts against the groove end of the first connecting rod 63 (the end close to the first flywheel 61), the first flywheel 61 and the second flywheel 62, the first flywheel 61 and the rotating shaft 5, and the second flywheel 62 and the rotating shaft 5 are all stably connected. At this time, the spring 68 is in a stretched state, forming a pulling force on the body part 66 in the direction away from the second flywheel 62, increasing the degree of pressure between the mating protrusion 65 and the groove end (the end close to the first flywheel 61).

[0056] In this embodiment, the stretched state of spring 68 provides force for the engagement of the protrusion 65 and the groove, which helps to enhance the fit between the locking rod 64 and the slot, further enhancing the installation stability of the overall structure of the inertial assembly 6 and the rotating shaft 5. Furthermore, by providing spring 68, the connecting assembly can be adapted to situations where the dimensions of the first flywheel 61 and the second flywheel 62 are not fixed, helping to prevent loosening of the assembly between the first flywheel 61 and the second flywheel 62, between the first flywheel 61 and the rotating shaft 5, and between the second flywheel 62 and the rotating shaft 5, thus improving the installation stability of the inertial assembly 6 as it rotates with the rotating shaft 5.

[0057] Figure 5 A schematic diagram of the connection structure of the wheel body according to an embodiment of the present disclosure is shown.

[0058] like Figure 5As shown, the braking system test platform also includes a test bench 1, a braking device 2, a bracket 3, a motor 4, and a wheel 7. The test bench 1 is horizontally arranged. The braking device 2 is detachably installed on the top surface of the test bench 1. The bracket 3 is fixedly installed on the top surface of the test bench 1. The motor 4 is fixedly installed on the top surface of the bracket 3. A plug 8 is fixed at the center of the wheel 7, and the plug 8 has a threaded groove 81. One axial end of the rotating shaft 5 is connected to the output shaft of the motor 4, and the other axial end of the rotating shaft 5 is fixedly connected to a mounting block 9. The mounting block 9 has a slot on the side away from the rotating shaft 5, and a fastening bolt 10 is threaded onto the mounting block 9. The plug 8 is inserted into the slot, and the fastening bolt 10 is screwed into the threaded groove 81 to achieve the connection between the wheel 7 and the rotating shaft 5.

[0059] Specifically, wheel 7 is used to simulate the running wheels of urban rail transit vehicles, and may be made of cast aluminum, among other things. Braking device 2 may be a hydraulic braking system, including but not limited to components such as brake cylinders, brake calipers, and brake pads. When a braking signal is issued, the piston in the brake cylinder pushes the brake caliper under hydraulic pressure, causing the brake pads to press tightly against the surface of wheel 7, achieving braking through friction. The central axis of shaft 5 is collinear with the central axis of the output shaft of motor 4, and one axial end of shaft 5 is connected to the output shaft of motor 4 via a coupling. Furthermore, the braking system test platform also includes a control component, electrically connected to motor 4 and braking device 2 respectively, used to control the operation of motor 4, adjust the braking force of braking device 2, and control other parameters during the test process.

[0060] Mounting block 9 is, but is not limited to, configured as a hexahedron, including two end faces and four side faces. A fixed connection between mounting block 9 and rotating shaft 5 is achieved by welding one end face of mounting block 9 to the end face of rotating shaft 5. Four fastening bolts 10 are provided on mounting block 9, including but not limited to threaded holes in the center of each of the four side faces of mounting block 9, allowing the four fastening bolts 10 to pass through the four threaded holes respectively. Furthermore, the edges of mounting block 9 are rounded to help reduce adverse effects when mounting block 9 comes into contact with other components.

[0061] The insert 8 is, but is not limited to, a cylindrical structure, with its extension direction parallel to that of the rotating shaft 5. It includes, but is not limited to, welding one end face of the insert 8 to the center of the wheel body 7 to achieve a fixed connection between the insert 8 and the wheel body 7. The extension direction of the slot is parallel to that of the insert 8, and the cross-sectional shape and size of the slot match those of the insert 8. After the insert 8 is inserted into the slot along its own extension direction, the fastening bolts 10, which pass through the mounting block 9, are screwed into the threaded grooves 81 of the insert 8 to achieve a fixed connection between the mounting block 9 and the insert 8, thereby achieving a fixed connection between the wheel body 7 and the rotating shaft 5. The structure, number, and distribution of the threaded grooves 81 on the insert 8 are all matched with the fastening bolts 10 on the mounting block 9.

[0062] In this implementation, firstly, a mounting block 9 is fixed to the rotating shaft 5, and an insert block 8 is fixed to the wheel body 7. When the mounting block 9 and the insert block 8 are connected through a slot and a fastening bolt 10, the wheel body 7 can be securely connected to the rotating shaft 5, enabling the wheel body 7 to rotate synchronously driven by the rotating shaft 5, which facilitates the smooth conduct of braking tests. The installation of the wheel body 7 is simple, helping to improve the overall structural installation efficiency of the braking system testing platform. Secondly, through the connection of the slot and the fastening bolt 10, when the fastening bolt 10 is unscrewed from the threaded groove 81 and the insert block 8 disengages from the slot, the wheel body 7 is separated from the rotating shaft 5. The disassembly process is simple, facilitating the replacement of the wheel body 7. This allows the braking system testing platform to meet the needs of testing wheel bodies 7 of different sizes, and also facilitates timely replacement or repair of the wheel body 7, improving the utilization efficiency of the braking system testing platform and extending its service life. Then, by setting up a braking device 2 and driving a rotating shaft 5 to rotate via a motor 4, which in turn drives the wheel 7 and inertial components 6 to rotate, the braking system test platform can simulate data such as braking force and inertial force during the operation of urban rail transit vehicles. Finally, considering that the number of inertial components 6 can be flexibly increased or decreased, and that the inertial components 6 can be quickly installed and disassembled, the inertial force in the braking system test platform is easy to adjust, improving the efficiency and reliability of the braking performance test platform and accelerating the development of efficient and reliable braking systems.

[0063] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A braking system testing platform, characterized in that, include: The rotating shaft (5) is provided with a mounting hole (51), the extension direction of which is perpendicular to the axial direction of the rotating shaft (5); The inertial assembly (6) includes a first flywheel (61), a second flywheel (62), and a connecting assembly. The first flywheel (61) and the second flywheel (62) are both semi-circular plates with the same shape. The first flywheel (61) and the second flywheel (62) are both provided with semi-circular through holes of the same shape at the center position. The first flywheel (61) and the second flywheel (62) are both sleeved on the rotating shaft (5) through the semi-circular through holes. The first flywheel (61) and the second flywheel (62) are spliced ​​together to form a circular plate structure with a circular through hole. The connecting component passes through the mounting hole (51) and is detachably connected to the first flywheel (61) and the second flywheel (62) respectively.

2. The braking system testing platform according to claim 1, characterized in that, The mounting holes (51) are distributed at intervals along the axial direction of the rotating shaft (5), and are all used to accommodate the installation of the inertial component (6).

3. The braking system test platform according to claim 1, characterized in that, The connection component includes: The first connecting rod (63) is located inside the mounting hole (51) and extends in a direction parallel to the extension direction of the mounting hole (51). One end of the first connecting rod (63) is fixedly connected to the second flywheel (62), and a groove is provided on the side wall of the first connecting rod (63). The second connecting rod includes a body (66) and a shaft (69). The body (66) extends along a plane normal direction perpendicular to the first flywheel (61) and passes through the first flywheel (61). The shaft (69) extends in a direction parallel to the extension direction of the body (66) and passes through the interior of the body (66). The shaft (69) has a mating protrusion (65) at one end located in the mounting hole (51) that engages with the groove.

4. The braking system testing platform according to claim 3, characterized in that, The first connecting rod (63) has a slot, which is located at the end of the groove away from the second flywheel (62); The mating protrusion (65) is fixed with a mating rod (64) that engages with the slot.

5. The braking system test platform according to claim 3, characterized in that, The second connecting rod also includes: A flange (611) is fixed to one end of the body part (66) that protrudes from the inside of the first flywheel (61) and is away from the mounting hole (51). The plane normal direction of the flange (611) is parallel to the extension direction of the body part (66).

6. The braking system testing platform according to claim 5, characterized in that, The second connecting rod also includes: A rotating rod (610) is fixed to one end of the shaft (69) that protrudes from the interior of the body (66) and the flange (611); Damping, the shaft (69) and the body (66) are interconnected by the damping; The shaft (69) and the mating protrusion (65) are driven to rotate together around the shaft (69) by rotating the rotating rod (610), and the damping can prevent the shaft (69), the mating protrusion (65) and the rotating rod (610) from rotating under the action of no external force.

7. The braking system testing platform according to claim 6, characterized in that, The second connecting rod also includes: A groove (614) is formed on the flange (611), and the cross-sectional shape of the groove (614) is arc-shaped; The slider (612) is fixedly connected to the side of the rotating rod (610) near the flange (611); When the rotating rod (610) rotates, it drives the slider (612) to slide on the groove (614).

8. The braking system test platform according to claim 7, characterized in that, An indicator (613) is fixedly connected to the side of the rotating rod (610) away from the flange (611), and the center of the indicator (613) and the center of the slider (612) are on the same straight line. The indicator (613) is used to indicate the position of the slider (612) on the groove (614).

9. The braking system test platform according to claim 3, characterized in that, The connection component also includes: The connecting piece (67) is fixed to the side wall of the main body (66) located inside the mounting hole (51); The spring (68) is fixedly connected at both ends to the connecting piece (67) and the first flywheel (61) respectively, and its extension direction is parallel to the extension direction of the mounting hole (51).

10. The braking system testing platform according to claim 1, characterized in that, Also includes: Test bench (1), horizontally arranged; Braking device (2) is detachably installed on the top surface of the test bench (1); The bracket (3) is fixedly installed on the top surface of the test bench (1); The motor (4) is fixedly installed on the top surface of the bracket (3); The wheel body (7) has a plug (8) fixed at its center, and the plug (8) has a threaded groove (81). One end of the rotating shaft (5) is connected to the output shaft of the motor (4) in the axial direction. The other end of the rotating shaft (5) is fixedly connected to a mounting block (9). A slot is provided on the side of the mounting block (9) away from the rotating shaft (5). A fastening bolt (10) is threaded on the mounting block (9). The insert (8) is inserted into the slot and the fastening bolt (10) is screwed into the threaded groove (81) to realize the connection between the wheel body (7) and the rotating shaft (5).

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