Brake type pulley test equipment and method for simulating pre-brake crash test
By designing a brake pulley test equipment with automatic braking function in simulated collision test equipment, the problem that existing equipment cannot simulate the continuous compounding process of vehicle pre-braking and collision is solved, and the composite simulation of vehicle pre-braking and collision processes is realized, reducing the test cost and improving the reliability of the equipment.
Patent Information
- Application Number
- CN202411848398.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-03-14
AI Technical Summary
Existing simulated collision test equipment cannot simulate the continuous compounding process of vehicle pre-braking and collision, and cannot meet the current needs of automotive safety performance development.
A brake pulley test equipment that simulates pre-braking collision test is designed, including a sliding table and a guide rail, a brake mechanism is installed on both sides of the sliding table, a brake lever and a release brake lever on the ground, and a composite simulation of the vehicle's pre-braking and collision process is achieved through the automatic braking function.
The composite simulation of the two processes of vehicle pre-braking and collision is realized, which reduces the test cost, improves the reliability of the equipment and the low maintenance cost.
Smart Images
Figure CN119618673A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile safety, and in particular to a braking pulley test device and method for simulating a pre-braking collision test. Background Art
[0002] Automobile safety includes active safety and passive safety. Active safety refers to the ability of the vehicle to actively avoid danger, while passive safety refers to the safety it can provide in an accident. Automobile passive safety technology refers to the protective measures that the car can provide to passengers in the car and pedestrians outside to avoid or reduce injuries after an accident.
[0003] The simulated collision test, also known as the sled test, refers to a test method that uses relevant test equipment to simulate the automobile collision process. It is one of the important means in the development process of automobile passive safety performance. Its advantages are low test cost and short test cycle.
[0004] In recent years, active safety technologies have been increasingly used in automotive products, such as AEB (Automatic Emergency Braking System) and other technologies. The passive collision process of automobiles has been affected by the application of active safety technologies and has undergone many changes. The existing simulation collision test methods can no longer meet the current needs of automobile safety performance development. At present, vehicle product development needs to consider the occupant injuries after vehicle braking and then the collision process. The existing simulation collision test equipment and methods cannot simulate this test condition.
[0005] refer to Figure 1 , Figure 2 The existing brake pulley test equipment mainly includes a traction motor 100, a traction steel cable 200, a traction guide rail 300, a slide 400, a miniature traction trailer 500, a slide disengagement mechanism 600, a hydraulic brake mechanism 700 and related control devices. During the test, the target test vehicle body is fixed on the slide 4, and after the collision test acceleration curve to be simulated is input into the control device, the control device can simulate the collision acceleration of the test vehicle body on the slide 4 and its internal load. The function of the existing brake pulley test equipment is limited to the simulation of the collision process, and it cannot simulate the vehicle pre-braking process, let alone the continuous composite process of pre-braking and collision.
[0006] In view of the above problems, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the invention
[0007] In order to solve at least one aspect of the above technical problems, the present invention provides a braking sled test device and method for simulating a pre-braking collision test, which can realize a composite simulation of the two processes of vehicle pre-braking and collision.
[0008] The technical solution adopted by the present invention is:
[0009] On the one hand, a brake-type sled test device for simulating a pre-brake collision test is provided, comprising a slide and a guide rail, the slide can move along the guide rail, a brake mechanism is respectively installed on both sides of the slide, and a brake lever and a brake release lever are respectively fixed in sequence on the ground on both sides of the guide rail along the forward direction of the slide;
[0010] The brake mechanism comprises a brake frame, a lifting mechanism and a cross-rotating rod; the lifting mechanism is connected to the brake frame, the cross-rotating rod is connected to the lifting mechanism, and the cross-rotating rod is composed of a brake rod and a release rod cross-fixed;
[0011] During the movement of the slide along the guide rail, the brake rod is blocked by the brake lever and then rotates until it does not interfere with the brake lever. The rotation of the brake lever drives the lifting mechanism to drive the brake frame to descend, and the brake pads at the bottom of the brake frame contact the ground, so that the slide is braked and continues to move along the guide rail. The release rod is blocked by the brake release lever and then rotates until it does not interfere with the brake release lever. The rotation of the release rod drives the lifting mechanism to drive the brake frame to rise, so that the slide is released from the brake and continues to move along the guide rail.
[0012] Further, the lifting mechanism includes a turntable lock and a connecting rod structure;
[0013] The turntable lock comprises a turntable, a spindle, a spindle connecting arm, and a roller sleeve rod, one end of the spindle connecting arm is fixedly connected to the slide, and the other end is fixedly connected to the spindle, the turntable is rotatably connected to the spindle, the roller sleeve rod is sleeved on the spindle and can slide up and down along the spindle, the bottom of the turntable has a first special-shaped tooth, the top of the roller sleeve rod has a second special-shaped tooth, and the bottom of the roller sleeve rod is rotatably connected to a roller; the cross rotating rod is fixedly connected to the turntable; when the cross rotating rod drives the turntable to rotate, the roller sleeve rod is made to reciprocate up and down in a straight line through the cooperation of the first special-shaped tooth and the second special-shaped tooth;
[0014] The connecting rod structure includes an upper connecting rod, a lower connecting rod and an upper connecting rod fixed shaft; one end of the upper connecting rod fixed shaft is fixedly connected to the slide, and the other end is hinged to the first end of the upper connecting rod, the second end of the upper connecting rod is hinged to the first end of the lower connecting rod, and the second end of the lower connecting rod is connected to the brake frame; the upper connecting rod is provided with a long groove, and the roller is installed in the long groove and can roll along the long groove.
[0015] Furthermore, the brake frame includes a frame body, a fixed arm, a fixed arm shaft, a guide rod, a slider, a swing arm and a swing arm shaft; the brake pad is installed on the bottom surface of the frame body, and the fixed arm shaft and the swing arm shaft are fixedly connected to the slide; one end of the fixed arm is hinged to the fixed arm shaft, and the other end is fixedly connected to the frame body; one end of the swing arm is hinged to the swing arm shaft, and the other end is hinged to the slider; the guide rod is fixedly connected to the frame body, the slider is slidably connected to the guide rod, and the second end of the lower connecting rod is hinged to the swing arm.
[0016] Furthermore, a spring fixing frame is installed on the swing arm shaft, and two connecting rod position spiral springs are connected to the spring fixing frame. The two connecting rod position spiral springs are respectively connected to the second end of the upper connecting rod and the first end of the lower connecting rod.
[0017] Furthermore, a locking structure is provided at the hinge between the upper link and the lower link, and the locking structure includes an upper link locking block and a lower link locking block, the upper link locking block is fixed to the second end of the upper link, and the lower link locking block is fixed to the first end of the lower link; when the lower link and the upper link are in a straight line position, the upper link locking block and the lower link locking block interfere with each other, so that the upper link cannot continue to rotate clockwise at this position.
[0018] Furthermore, the guide rod is arranged parallel to the ground; the bottom surface of the frame is a plane, and the brake pad is fittedly installed on the bottom surface of the frame; during the lifting and lowering process of the frame, the bottom surface of the frame is always parallel to the ground.
[0019] Furthermore, the rotating axes of the turntable and the core shaft are colinear, the intersection of the cross rotating rod is located on the rotating axis, the four rotating arms of the cross rotating rod are spaced 90° apart in sequence, the two opposite rotating arms of the four rotating arms are braking rods, and the other two opposite arms are release rods.
[0020] On the other hand, a simulated pre-braking collision test method is provided, using the above-mentioned braking sled test equipment, the method comprising the following steps:
[0021] Design three control parameters: pre-brake starting point , pre-brake end point , slide disengagement point ;
[0022] Build a control relationship model between control parameters and test input parameters: the test input parameters include test quality , pre-brake acceleration data , collision acceleration data , build a relationship model between the three control parameters and the test input parameters;
[0023] The test input parameters are input into the control relationship model, and the control relationship model outputs the values of each control parameter. The brake pulley test equipment is adjusted according to the output control parameter values. After the adjustment, the brake pulley test equipment is started to perform a simulated pre-braking collision test.
[0024] Furthermore, the control relationship model between the construction control parameters and the test input parameters specifically includes:
[0025] Build a relationship model between the control parameters and the test input parameters:
[0026]
[0027] The brake pulley test equipment is used to conduct N groups of tests with different test input parameters and control parameters. Each group of tests contains a set of input parameter data and a set of measured parameter data. The number of data groups N ≥ 100. The data of the N groups of tests are analyzed to clarify the function formula. The specific value of .
[0028] Furthermore, the brake pulley test equipment is adjusted according to the output control parameter value:
[0029] According to the pre-brake starting point Set the installation position of the brake lever;
[0030] According to the end point of pre-brake Set the installation position of the brake release lever;
[0031] According to the slide disengagement point Set the installation position of the slide release mechanism.
[0032] Compared with the prior art, the beneficial effects of the present invention are:
[0033] The brake pulley test equipment provided by the present invention is a brake mechanism with a unique design installed on the slide table of the existing brake pulley test equipment, and a fixed brake lever and a release brake lever are provided on the ground, so that the test equipment has an automatic braking function. Based on the brake pulley test equipment of the present invention, a test method is provided, which can realize the composite simulation of the two processes of vehicle pre-braking and collision, with low cost, reliable structure and low cost of equipment maintenance in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0035] Figure 1 The structural schematic diagram of the existing brake pulley test equipment is shown;
[0036] Figure 2 A basic flow chart of the existing simulated collision test method is shown;
[0037] Figure 3 A schematic structural diagram of a brake-type pulley test device according to an embodiment of the present invention is shown;
[0038] Figure 4 A schematic diagram showing the structure of a brake mechanism, a brake lever and a brake release lever according to an embodiment of the present invention;
[0039] Figure 5 A schematic structural diagram of a turntable lock and a cross turnbar according to an embodiment of the present invention is shown;
[0040] Figure 6 A schematic structural diagram of a locking structure according to an embodiment of the present invention is shown;
[0041] Figure 7 A basic flow chart showing a test method according to an embodiment of the present invention. DETAILED DESCRIPTION
[0042] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.
[0043] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, unless otherwise clearly and specifically defined.
[0045] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0047] like Figure 3 , Figure 4As shown, the present invention provides a brake type slide test equipment for simulating a pre-brake collision test, including a slide 400 and a guide rail, the slide 400 can move along the guide rail, a brake mechanism 401 is installed on both sides of the slide 400, and a brake lever 402 and a brake release lever 403 are fixed on the ground on both sides of the guide rail in sequence along the forward direction of the slide 400, that is, the brake lever 402 and the brake release lever 403 are independently fixed on the ground, located on the side of the slide, and parallel to the guide rail direction, and the brake mechanism 401 is connected and fixed on the slide 400. The brake mechanism 401 includes a brake frame, a lifting mechanism and a cross rotating rod; the lifting mechanism is connected to the brake frame, the cross rotating rod is connected to the lifting mechanism, and the cross rotating rod is composed of a brake rod 25 and a release rod 9 fixed in a cross. During the movement of the slide 400 along the guide rail, the brake rod 25 is blocked by the brake lever 402 and then rotates until it does not interfere with the brake lever 402. The rotation of the brake rod 25 drives the lifting mechanism to drive the brake frame to descend, and the brake pad 24 at the bottom of the brake frame contacts the ground, so that the slide 400 continues to move along the guide rail while braking. Afterwards, the release rod 9 is blocked by the brake release lever 403 and then rotates until it does not interfere with the brake release lever 403. The rotation of the release rod 9 drives the lifting mechanism to drive the brake frame to rise, so that the slide 400 continues to move along the guide rail while releasing the brake.
[0048] It can be understood that during the test, the target test vehicle body is fixed on the slide. When the slide is towed by the miniature tractor trailer and moves forward along the guide rail, it will first pass through the brake lever 402, at which time the braking action begins, and then pass through the brake release lever 403, at which time the braking action begins. When the brake pad 24 is in contact with the ground, it means that the braking has begun, and when the brake pad 24 is separated from the ground, it means that the braking has ended. Furthermore, the brake-type trolley test equipment of the present invention can realize a composite simulation of the pre-braking and collision process for the test vehicle body on the slide and its internal load.
[0049] like Figure 4 , Figure 5As shown, in a specific embodiment, the lifting mechanism includes a turntable lock and a connecting rod structure. The turntable lock includes a turntable 8, a spindle 27, a spindle connecting arm 10 and a roller sleeve rod 13. One end of the spindle connecting arm 10 is fixedly connected to the slide 400 through a connecting arm support 11, and the other end of the spindle connecting arm 10 is fixedly connected to the spindle 27. The turntable 8 is rotatably connected to the spindle 27. The roller sleeve rod 13 is sleeved on the spindle 27 and can slide up and down along the spindle 27. The bottom of the turntable 8 has a first special-shaped tooth 81, the top of the roller sleeve rod 13 has a second special-shaped tooth 131, and the bottom of the roller sleeve rod 13 is rotatably connected to the roller 17 through the roller shaft 26. The cross rotating rod is fixedly connected to the turntable 8. When the cross rotating rod drives the turntable 8 to rotate, the roller sleeve rod 13 is reciprocated up and down by the cooperation of the first special-shaped tooth 81 and the second special-shaped tooth 131. The connecting rod structure includes an upper connecting rod 16, a lower connecting rod 20 and an upper connecting rod fixed shaft 14. One end of the upper connecting rod fixed shaft 14 is fixedly connected to the slide 400 through the upper connecting rod fixed shaft support 12, the other end of the upper connecting rod fixed shaft 14 is hinged to the first end of the upper connecting rod 16, the second end of the upper connecting rod 16 is hinged to the first end of the lower connecting rod 20 through the connecting rod connecting shaft 19, and the second end of the lower connecting rod 20 is connected to the brake frame. The upper connecting rod 16 has a long groove, and the roller 17 is installed in the long groove and can roll along the long groove.
[0050] It should be noted that when the brake rod 25 is blocked by the brake lever 402 and then rotates, the cross-rotating rod drives the turntable 8 to rotate, and the first special-shaped tooth 81 at the bottom of the turntable 8 and the second special-shaped tooth 131 at the top of the roller sleeve rod 13 engage and rotate. Due to the special tooth structure, the roller sleeve rod 13 moves downward along the core shaft 27, and the roller 17 moves in the long groove and acts on the upper connecting rod 16. The upper connecting rod 16 rotates counterclockwise around the upper connecting rod fixed shaft 14, thereby driving the lower connecting rod 20 to rotate, and the lower connecting rod 20 drives the brake frame to descend. When the release rod 9 is blocked by the brake release lever 403 and then rotates, the cross-rotating rod drives the turntable 8 to rotate. Due to the special tooth structure, the roller sleeve rod 13 moves upward along the core shaft 27, and the lower connecting rod 20 drives the brake frame to rise.
[0051] In a preferred embodiment, the mandrel 27 is vertically arranged, the rotating axes of the rotating disk 8 and the mandrel 27 are colinear, the intersection of the cross rotating rod is located on the rotating axis, the four rotating arms of the cross rotating rod are sequentially spaced 90° apart, the two opposite arms of the four rotating arms are both brake rods 25, and the other two opposite arms are both release rods 9. The rotating disk 8 is rotatably connected to the mandrel 27 through the fixing pin 7. A connecting hole is radially provided on the mandrel 27, one end of the mandrel connecting arm 10 passes through the connecting hole and is fixed to the mandrel 27, a through hole is provided on the roller sleeve rod 13, the mandrel connecting arm 10 passes through the through hole, and the mandrel connecting arm 10 moves in the through hole during the upward and downward movement of the roller sleeve rod 13.
[0052] The brake frame includes a frame body 1, a fixed arm 15, a fixed arm shaft, a guide rod 21, a slider 2, a swing arm 3 and a swing arm shaft 4. The brake pad 24 is installed on the bottom surface of the frame body 1, the fixed arm shaft is fixedly connected to the slide 400, and the swing arm shaft 4 is fixedly connected to the slide 400 through the swing arm support 6. One end of the fixed arm 15 is hinged to the fixed arm shaft, and the other end of the fixed arm 15 is fixedly connected to the frame body 1. The slider 2 is provided with a lower connecting rod fixed shaft 22 and a swing arm connecting shaft 23. One end of the swing arm 3 is hinged to the swing arm shaft 4, and the other end of the swing arm 3 is hinged to the swing arm connecting shaft 23. The guide rod 21 is fixedly connected to the frame body 1, the slider 2 is slidably connected to the guide rod 21, and the second end of the lower connecting rod 20 is hinged to the lower connecting rod fixed shaft 22.
[0053] It should be noted that the roller sleeve rod 13 moves up and down along the core shaft 27, the roller 17 acts on the upper connecting rod 16, the connecting rod structure drives the swing arm 3 to swing, and the slider 2 acts on the frame 1 while sliding along the guide rod 21, thereby driving the frame 1 to swing up or swing down. Preferably, the guide rod 21 is arranged parallel to the ground, the bottom surface of the frame 1 is a plane and is arranged parallel to the ground, the brake pad 24 is fitted on the bottom surface of the frame 1, and during the swinging and lifting process of the frame 1, the bottom surface of the frame 1 is always parallel to the ground.
[0054] like Figure 4 , Figure 6 As shown, a spring fixing frame 5 is installed on the swing arm shaft 4, and two connecting rod position spiral springs 18 are connected to the spring fixing frame 5, and the two connecting rod position spiral springs 18 are respectively connected to the second end of the upper connecting rod 16 and the first end of the lower connecting rod 20. After the roller sleeve rod 13 is lowered, when the rotation of the rod 9 is released, the roller sleeve rod 13 rises under the action of the rod position spiral spring 18, and the first special-shaped tooth 81 and the second special-shaped tooth 131 always remain in meshing. A locking structure is provided at the hinge of the upper connecting rod 16 and the lower connecting rod 20, and the locking structure includes an upper connecting rod locking block 161 and a lower connecting rod locking block 201, the upper connecting rod locking block 161 is fixed to the second end of the upper connecting rod 16, and the lower connecting rod locking block 201 is fixed to the first end of the lower connecting rod 20. When the lower connecting rod 20 and the upper connecting rod 20 are in a straight line, the upper connecting rod locking block 161 and the lower connecting rod locking block 201 interfere with each other, so that the upper connecting rod cannot continue to rotate clockwise at this position, that is, the second end of the upper connecting rod 16 can only descend but not ascend at this position. In addition, under the tension of the connecting rod position spiral spring 18, the upper and lower connecting rod axes can be locked when they are in a straight line, and the turntable 8 will be locked at a rotation interval of 90°.
[0055] like Figure 7 As shown, in this embodiment, based on the above-mentioned brake sled test equipment, the implementation scheme of the simulated pre-braking collision test method of the present invention is as follows:
[0056] 1. Design control parameters.
[0057] Design three control parameters: Braking starting point , brake end point , slide disengagement point (braking end point) , as the input quantity for the test equipment operation, where the braking starting point Will determine the installation position of the equipment component brake lever, the braking end point The installation position of the brake release lever will determine the slide disengagement point (braking end point) This will determine the installation location of the slide release mechanism.
[0058] 2. Build a control relationship model between control parameters and test input quantities.
[0059] The input parameters for the simulated pre-brake collision test include: test quality , pre-brake acceleration data , collision acceleration data , first build the relationship model between the above three control parameters and the test input parameters:
[0060]
[0061] Carry out N groups of sliding table tests with different input parameters and control parameters. Each group of tests contains a group of input parameter data and a group of measured parameter data. The number of data groups N ≥ 100. By analyzing the N groups of input parameter data and measured parameter data, the function formula is clarified. The specific value of the group.
[0062]
[0063] 3. During the test, the test input parameters are given to the control parameter model, and the model will directly give the control parameter values, thereby adjusting the brake equipment structure.
[0064] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. The structures and connection modes of the components in the present invention can be changed, and any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims
1. A braking sled test device for simulating a pre-braking collision test, comprising a slide and a guide rail, wherein the slide can move along the guide rail, and wherein: A brake mechanism is installed on both sides of the slide, and a brake lever and a brake release lever are fixed in sequence on the ground on both sides of the guide rail along the forward direction of the slide. The brake mechanism comprises a brake frame, a lifting mechanism and a cross-rotating rod; the lifting mechanism is connected to the brake frame, the cross-rotating rod is connected to the lifting mechanism, and the cross-rotating rod is composed of a brake rod and a release rod cross-fixed; During the movement of the slide along the guide rail, the brake rod is blocked by the brake lever and then rotates until it does not interfere with the brake lever. The rotation of the brake lever drives the lifting mechanism to drive the brake frame to descend, and the brake pads at the bottom of the brake frame contact the ground, so that the slide is braked and continues to move along the guide rail. The release rod is blocked by the brake release lever and then rotates until it does not interfere with the brake release lever. The rotation of the release rod drives the lifting mechanism to drive the brake frame to rise, so that the slide is released from the brake and continues to move along the guide rail.
2. A braking sled test equipment for simulating a pre-braking collision test as claimed in claim 1, characterized in that: The lifting mechanism includes a turntable lock and a connecting rod structure; The turntable lock comprises a turntable, a spindle, a spindle connecting arm, and a roller sleeve rod, one end of the spindle connecting arm is fixedly connected to the slide, and the other end is fixedly connected to the spindle, the turntable is rotatably connected to the spindle, the roller sleeve rod is sleeved on the spindle and can slide up and down along the spindle, the bottom of the turntable has a first special-shaped tooth, the top of the roller sleeve rod has a second special-shaped tooth, and the bottom of the roller sleeve rod is rotatably connected to a roller; the cross rotating rod is fixedly connected to the turntable; when the cross rotating rod drives the turntable to rotate, the roller sleeve rod is made to reciprocate up and down in a straight line through the cooperation of the first special-shaped tooth and the second special-shaped tooth; The connecting rod structure includes an upper connecting rod, a lower connecting rod and an upper connecting rod fixed shaft; one end of the upper connecting rod fixed shaft is fixedly connected to the slide, and the other end is hinged to the first end of the upper connecting rod, the second end of the upper connecting rod is hinged to the first end of the lower connecting rod, and the second end of the lower connecting rod is connected to the brake frame; the upper connecting rod is provided with a long groove, and the roller is installed in the long groove and can roll along the long groove.
3. A braking sled test equipment for simulating a pre-braking collision test as claimed in claim 2, characterized in that: The brake frame includes a frame body, a fixed arm, a fixed arm shaft, a guide rod, a slider, a swing arm and a swing arm shaft; the brake pad is installed on the bottom surface of the frame body, and the fixed arm shaft and the swing arm shaft are fixedly connected to the slide; one end of the fixed arm is hinged to the fixed arm shaft, and the other end is fixedly connected to the frame body; one end of the swing arm is hinged to the swing arm shaft, and the other end is hinged to the slider; the guide rod is fixedly connected to the frame body, the slider is slidably connected to the guide rod, and the second end of the lower connecting rod is hinged to the swing arm.
4. A braking sled test equipment for simulating a pre-braking collision test as claimed in claim 3, characterized in that: A spring fixing frame is installed on the swing arm shaft, and two connecting rod position spiral springs are connected to the spring fixing frame. The two connecting rod position spiral springs are respectively connected to the second end of the upper connecting rod and the first end of the lower connecting rod.
5. A braking sled test equipment for simulating a pre-braking collision test as claimed in claim 4, characterized in that: A locking structure is provided at the hinge of the upper link and the lower link, and the locking structure includes an upper link locking block and a lower link locking block, the upper link locking block is fixed to the second end of the upper link, and the lower link locking block is fixed to the first end of the lower link; when the lower link and the upper link are in a straight line position, the upper link locking block and the lower link locking block interfere with each other, so that the upper link cannot continue to rotate clockwise at this position.
6. A braking sled test device for simulating a pre-braking collision test as claimed in claim 3, characterized in that: The guide rod is arranged parallel to the ground; the bottom surface of the frame is a plane, and the brake pad is fitted and installed on the bottom surface of the frame; during the lifting process of the frame, the bottom surface of the frame is always parallel to the ground.
7. A braking sled test device for simulating a pre-braking collision test as claimed in claim 3, characterized in that: The rotating axes of the turntable and the core shaft are colinear, the intersection of the cross rotating rod is located on the rotating axis, the four rotating arms of the cross rotating rod are sequentially spaced 90° apart, the two opposite rotating arms of the four rotating arms are both braking rods, and the other two opposite arms are both release rods.
8. A simulated pre-braking collision test method, characterized in that: Using the brake pulley test equipment according to any one of claims 1 to 7, the method comprises the following steps: Design three control parameters: pre-brake starting point , pre-brake end point , slide disengagement point ; Build a control relationship model between control parameters and test input parameters: the test input parameters include test quality , pre-brake acceleration data , collision acceleration data , build a relationship model between the three control parameters and the test input parameters; The test input parameters are input into the control relationship model, and the control relationship model outputs the values of each control parameter. The brake pulley test equipment is adjusted according to the output control parameter values. After the adjustment, the brake pulley test equipment is started to perform a simulated pre-braking collision test.
9. A simulated pre-braking collision test method as claimed in claim 8, characterized in that: The control relationship model between the construction control parameters and the test input parameters specifically includes: Build a relationship model between the control parameters and the test input parameters: The brake pulley test equipment is used to conduct N groups of tests with different test input parameters and control parameters. Each group of tests contains a set of input parameter data and a set of measured parameter data. The number of data groups N ≥ 100. The data of the N groups of tests are analyzed to clarify the function formula. The specific value of .
10. A simulated pre-braking collision test method as claimed in claim 9, characterized in that: The brake pulley test equipment is adjusted according to the output control parameter value: According to the pre-brake starting point Set the installation position of the brake lever; According to the end point of pre-brake Set the installation position of the brake release lever; According to the slide disengagement point Set the installation position of the slide release mechanism.