Brake type pulley collision system and debugging method

Abstract

The braking type tackle collision system comprises a sliding table, a brake frame, a traction mechanism, a brake frame driving mechanism and a connecting rod mechanism, and the first end of the brake frame is rotatably connected with the sliding table; the traction mechanism comprises a swing arm and a sliding top block, the brake frame driving mechanism comprises a brake gear lever and a brake release gear lever, the brake frame driving mechanism further comprises a rotary disc lock, a driving piece and a rotary disc lock cylinder shaft, and a brake rotating lever and a brake release rotating lever are fixedly arranged at the top end of the rotary disc lock; the connecting rod mechanism comprises an upper connecting rod, a lower connecting rod, a connecting rod connecting shaft and a connecting rod position rotating spring, the first end of the upper connecting rod is rotatably connected with the sliding table, the second end of the upper connecting rod is rotatably connected with the first end of the lower connecting rod through the connecting rod connecting shaft, and the second end of the lower connecting rod is rotatably connected with the swing arm; the first end of the connecting rod position rotation spring is fixedly connected with the sliding table, the second end of the connecting rod position rotation spring is fixedly connected with the connecting rod connecting shaft, and the bottom end of the driving piece abuts against the upper connecting rod.

Description

Technical Field

[0001] The invention relates to the technical field of simulated pre-braking collision test, in particular to a braking pulley collision system and a debugging method. 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 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 simulated collision test methods can no longer meet the current needs of automobile safety performance development. Summary of the invention

[0005] To solve at least one aspect of the above problems, the present invention provides a braking pulley collision system, comprising: a slide, the slide is used to fix and connect the test vehicle body; a brake frame, the first end of the brake frame is rotatably connected to the slide, so that the brake frame rotates between a first position and a second position, the lower surface of the brake frame is against the ground at the first position and leaves the ground at the second position; a traction mechanism, the traction mechanism comprises a swing arm and a sliding top block, the first end of the swing arm is rotatably connected to the slide, the second end of the swing arm is rotatably connected to the sliding top block, and the sliding top block is movably connected to the upper surface of the brake frame; a brake frame driving mechanism, the brake frame driving mechanism comprises a brake lever and a brake release lever, the brake lever and the brake release lever are fixedly arranged on the first side of the slide in sequence, the brake frame driving mechanism also comprises a turntable lock, a driving member and a turntable lock spindle, the top of the turntable lock is fixedly provided with the brake rotating rod and the brake release rotating rod, the bottom end of the turntable lock is fixedly provided with a driving tooth, the top end of the driving member is provided with a A first tooth groove and a second tooth groove are arranged, the driving member is movably arranged under the turntable lock, the turntable lock rotates when the brake rotating rod and the brake release rotating rod are respectively abutted against the brake gear rod and the brake release gear rod, the driving tooth is clamped with the first tooth groove and the second tooth groove in sequence, the driving member moves between the third position and the fourth position, the turntable lock core shaft is rotatably connected to the turntable lock, the turntable lock core shaft is movably connected to the driving member, and the turntable lock core shaft is fixedly connected to the slide; The connecting rod mechanism comprises an upper connecting rod, a lower connecting rod, a connecting rod connecting shaft and a connecting rod position return spring, the first end of the upper connecting rod is rotatably connected to the slide, the second end of the upper connecting rod and the first end of the lower connecting rod are rotatably connected through the connecting rod connecting shaft, the second end of the lower connecting rod is rotatably connected to the swing arm, the first end of the connecting rod position return spring is fixedly connected to the slide, the second end of the connecting rod position return spring is fixedly connected to the connecting rod connecting shaft, and the bottom end of the driving member abuts against the upper connecting rod.

[0006] Preferably, the slide also includes a first cantilever shaft and a second cantilever shaft, one end of the first cantilever shaft and the second cantilever shaft respectively extend from one side of the slide, the first cantilever shaft and the second cantilever shaft are arranged parallel to each other, the first cantilever shaft is used to rotatably connect the swing arm, and the second cantilever shaft is used to rotatably connect the brake frame, the slide also includes a first cantilever shaft support and a second cantilever shaft support, the first cantilever shaft support and the second cantilever shaft support are respectively used for fixed connection of the first cantilever shaft and the second cantilever shaft with the body of the slide.

[0007] Preferably, the brake frame comprises a brake frame body and a brake pad, and the brake pad is fixedly arranged on the lower surface of the brake frame body.

[0008] Preferably, the slider guide rail includes a guide rod and a fixed plate, the fixed plate is vertically arranged on the upper surface of the brake frame, the fixed plate includes a first fixed plate and a second fixed plate parallel to each other, the axial direction of the guide rod is parallel to the upper surface of the brake plate, one end of the guide rod passes through the first fixed plate and is fixedly connected to the second fixed plate, and the sliding top block is movably sleeved on the guide rod.

[0009] Preferably, the top end of the driving member includes two first tooth grooves and two second tooth grooves, and the two first tooth grooves and the two second tooth grooves are arranged at intervals.

[0010] Preferably, the driving member is a cam sleeve rod, the first tooth groove and the second tooth groove are arranged at the top end of the cam sleeve rod, and a cam is arranged at the bottom end of the cam sleeve rod, and the cam abuts against the upper connecting rod.

[0011] Preferably, the slide includes a turntable lock core shaft connecting arm, the turntable lock core shaft is fixedly connected to the turntable lock core shaft connecting arm, the cam sleeve is sleeved with the turntable lock core shaft, a guide rail through hole is opened on the cam sleeve, the guide rail through hole is parallel in the vertical direction, the guide rail through hole is strip-shaped, and the end of the turntable lock core shaft connecting arm passes through one side of the guide rail through hole and passes out from the other side of the guide rail through hole.

[0012] Preferably, the swing arm includes a first swing arm, a second swing arm, and a lower connecting rod fixed shaft, the first swing arm and the second swing arm are arranged in parallel, the top ends of the first swing arm and the second swing arm are rotatably connected to the slide, the bottom ends of the first swing arm and the second swing arm are respectively rotatably connected to the sliding top block, the lower connecting rod fixed shaft is arranged between the first swing arm and the second swing arm, the two ends of the lower connecting rod fixed shaft are respectively fixedly connected to the first swing arm and the second swing arm, and the lower connecting rod is rotatably connected to the lower connecting rod fixed shaft.

[0013] Preferably, a first limit block is provided at the second end of the upper connecting rod, and a second limit block is provided at the first end of the lower connecting rod, and when the upper connecting rod and the lower connecting rod are collinear, the lower surface of the first limit block and the upper surface of the second limit block abut against each other.

[0014] On the other hand, a method for debugging a brake pulley collision system is provided, using a brake pulley device collision system as described in any of the above, wherein the brake pulley device collision system also includes a hydraulic brake mechanism, including: obtaining a target acceleration curve, the target acceleration curve includes a braking acceleration curve and a collision acceleration curve; determining a braking starting point and a braking ending point according to the braking acceleration curve, obtaining a slide disengagement distance, determining a slide disengagement point according to the slide disengagement distance and the braking starting point, the braking starting point is used to set a brake lever, the braking ending point is used to set a brake release lever, and the slide disengagement point is controlled by the brake start point. The moving end point is used to set the slide disengagement mechanism; the collision speed is determined according to the collision acceleration curve, and the input acceleration curve is generated according to the collision speed and the collision acceleration curve; the hydraulic brake mechanism is controlled to perform a test and obtain a test acceleration curve according to the slide mass and the input acceleration curve; the test acceleration curve is compared with the target acceleration curve, and when the difference between the test acceleration curve and the target acceleration curve is less than or equal to a preset threshold, a collision test is performed, and when the difference between the test acceleration curve and the target acceleration curve is greater than the preset threshold, the input acceleration curve is re-determined.

[0015] The braked trolley collision system and debugging method of the embodiment of the present invention have the following beneficial effects: the mechanism can be installed on the slide of the existing braked trolley test equipment to increase the automatic braking function of the slide; a new test method is invented, based on the above invention and the braked trolley test equipment, to perform a composite simulation of the two processes of vehicle pre-braking and collision. First, the test input parameter and new control parameter model are designed and built. During the test, the equipment hardware structure and equipment software parameters are adjusted according to the test input parameters. Then, after multiple tests, the pre-braking and collision acceleration of the slide are made the same as the acceleration of the simulated object (with a certain accuracy), thereby achieving a composite simulation of the vehicle pre-braking and collision process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0017] Figure 1 It shows a schematic structural diagram of a braking pulley collision system according to an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of a brake drive mechanism of a brake-type sled collision system according to an embodiment of the present invention is shown;

[0019] Figure 3 It shows a schematic structural diagram of a brake plate and a sliding top block of a brake type pulley collision system according to an embodiment of the present invention;

[0020] Figure 4 A schematic structural diagram of an upper link and a lower link of a braking pulley collision system according to an embodiment of the present invention is shown;

[0021] Figure 5 A schematic diagram of a brake release structure of a brake-type pulley collision system according to an embodiment of the present invention is shown;

[0022] Figure 6 It shows a schematic diagram of the braking state structure of the braking pulley collision system according to an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of a target acceleration curve of an application scenario of a braking block collision system debugging method according to an embodiment of the present invention is shown.

[0024] Reference numerals:

[0025] 1. Brake frame; 101. Bottom plate; 102. Connecting plate; 2. Sliding top block; 3. Swing arm; 4. Cantilever shaft; 41. First cantilever shaft; 42. Second cantilever shaft; 5. Spring fixing frame; 6. Cantilever shaft support; 7. Turntable lock fixing bolt; 8. Turntable lock; 9. Release brake rotating rod; 10. Turntable lock core shaft connecting arm; 11. Connecting arm support; 12. Upper connecting rod fixed shaft support; 13. Cam sleeve rod; 14. Upper connecting rod fixed shaft; 15. Release brake lever; 16. Upper connecting rod; 17. Cam; 18. Connecting rod position swing spring; 19. Connecting rod connecting shaft; 20. Lower connecting rod; 21. Brake lever; 22. Lower connecting rod fixed shaft; 23. Swing arm connecting shaft; 24. Brake pad; 25. Brake rotating rod; 26. Cam shaft; 27. Turntable lock core shaft; 28. Slider guide rail. DETAILED DESCRIPTION

[0026] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0027] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0028] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, an embodiment of the present disclosure proposes a braking pulley collision system, comprising: a slide, a brake frame 1, a traction mechanism, a brake frame 1 driving mechanism and a connecting rod mechanism, the slide is used to fix the test vehicle body; the first end of the brake frame 1 is rotatably connected to the slide, so that the brake frame 1 rotates between a first position and a second position, the lower surface of the brake frame 1 is against the ground at the first position and leaves the ground at the second position; the traction mechanism comprises a swing arm 3 and a sliding top block 2, the first end of the swing arm 3 is rotatably connected to the slide, the second end of the swing arm 3 is rotatably connected to the sliding top block 2, and the sliding top block 2 is movably connected to the upper surface of the brake frame 1; the brake frame 1 driving mechanism comprises a brake lever 21 and a brake release lever 15, the brake lever 21 and the brake release lever 15 are fixedly arranged on the first side of the slide in sequence, the brake frame 1 driving mechanism also comprises a turntable lock 8, a driving member and a turntable lock core shaft 27, the top of the turntable lock 8 is fixedly provided with a brake rotating rod 25 and a brake release rotating rod 259, the turntable lock 8 A driving tooth is fixedly set at the bottom end, a first tooth groove and a second tooth groove are set at the top end of the driving member, and the driving member is movably set below the turntable lock 8. When the brake rotating rod 25 and the brake release rotating rod 259 abut against the brake gear rod 21 and the brake release gear rod 15 respectively, the turntable lock 8 rotates, the driving tooth is clamped with the first tooth groove and the second tooth groove in sequence, and the driving member moves between the third position and the fourth position. The turntable lock core shaft 27 is rotatably connected to the turntable lock 8, the turntable lock core shaft 27 is movably connected to the driving member, and the turntable lock core shaft 27 is fixed to the slide Connection; the connecting rod mechanism includes an upper connecting rod 16, a lower connecting rod 20, a connecting rod connecting shaft 19 and a connecting rod position return spring 18, the first end of the upper connecting rod 16 is rotatably connected to the slide, the second end of the upper connecting rod 16 and the first end of the lower connecting rod 20 are rotatably connected through the connecting rod connecting shaft 19, the second end of the lower connecting rod 20 is rotatably connected to the swing arm 3, the first end of the connecting rod position return spring 18 is fixedly connected to the slide, the second end of the connecting rod position return spring 18 is fixedly connected to the connecting rod connecting shaft 19, and the bottom end of the driving member abuts against the upper connecting rod 16.

[0029] Specifically, the brake-type pulley collision system includes a traction motor, a traction steel cable, a traction guide rail, a miniature traction trailer, a slide, a slide disengagement mechanism, a hydraulic brake mechanism, and a control unit. The traction motor drives the miniature traction trailer to drag the slide along the traction guide rail through the traction steel cable, and the slide disengagement mechanism is arranged at a preset position of the traction guide rail. The control unit is electrically connected to the traction motor and the hydraulic brake mechanism respectively to control the power of the traction motor and the hydraulic brake mechanism.

[0030] The slide is movably arranged on the traction guide rail, and the brake frame 1 is rotatably connected to the slide so that the brake frame 1 can move with the slide. When the brake frame 1 is at the first position, the bottom surface of the brake frame 1 brakes the slide through friction with the ground. When the brake frame 1 is at the second position, the bottom surface of the brake frame 1 leaves the ground contact to brake the slide.

[0031] The traction mechanism is used to rotatably connect the brake frame 1 and the slide. The traction mechanism can rotatably connect the slide and the sliding top block 2 through the swing arm 3. The sliding top block 2 is movably arranged on the upper surface of the brake frame 1. The moving trajectory of the sliding top block 2 on the upper surface of the brake frame 1 is parallel to the rotation plane of the brake frame 1. The moving trajectory of the sliding top block 2 is parallel to the length direction of the brake frame 1. For example, the sliding track extends from the first end of the brake frame 1 to the second end of the brake frame 1. When the sliding top block 2 slides along the sliding track from near the first end of the brake frame 1 to the second end of the brake frame 1 under the drive of the swing arm 3, the brake frame 1 rotates from the first position to the second position; when the brake frame 1 rotates from the second position to the first position, the sliding top block 2 moves along the sliding track from near the second end of the brake frame 1 to the first end of the brake frame 1 under the drive of the swing arm 3.

[0032] The preset position of the traction guide rail includes a braking starting point and a braking ending point. A braking lever 21 is set at the braking starting point, and a brake release lever 15 is set at the braking ending point. The braking lever 21 and the brake release lever 15 are set vertically to the ground, and the height of the braking lever 21 and the brake release lever 2115 is greater than the setting height of the braking rotating lever 25 and the brake release rotating lever 9, so that the braking rotating lever 25 and the brake release rotating lever 9 can respectively abut against the braking lever 21 and the brake release lever 15 when moving with the slide. When the braking rotating lever 25 abuts against the braking lever 21, the turntable lock 8 rotates under the drive of the braking rotating lever 25, the driving tooth moves from the first tooth groove to the second tooth groove, and the driving member moves from the third position to the fourth position; when the brake release rotating lever 9 abuts against the brake release lever 15, the turntable lock 8 rotates under the drive of the brake release rotating lever 9, the driving tooth moves from the second tooth groove to the first tooth groove, and the driving member moves from the fourth position to the third position. The height difference between the third position and the fourth position in the vertical direction is equal to the depth difference between the first tooth groove and the second tooth groove.

[0033] The connecting rod mechanism is used to realize power transmission between the traction mechanism and the brake drive mechanism. The upper connecting rod 16 and the lower connecting rod 20 are rotatably connected to the connecting rod connecting shaft 19 respectively. The bottom end of the driving member can be movably abutted against the upper connecting rod 16, so that the upper connecting rod 16 rotates under the drive of the driving member, and further pulls the sliding top block 2 to move along the sliding track on the brake pad 24 through the lower connecting rod 20, and resets the upper connecting rod 1616 and the lower connecting rod 20 through the connecting rod position return spring 18.

[0034] In some embodiments, the slide also includes a first cantilever shaft 41 and a second cantilever shaft 42, one end of the first cantilever shaft 41 and the second cantilever shaft 42 respectively extend from one side of the slide, the first cantilever shaft 41 and the second cantilever shaft 42 are arranged parallel to each other, the first cantilever shaft 41 is used to rotatably connect the swing arm 3, and the second cantilever shaft 42 is used to rotatably connect the brake frame 1, the slide also includes a first cantilever shaft 41 support and a second cantilever shaft 42 support, the first cantilever shaft 41 support and the second cantilever shaft 42 support are respectively used for fixed connection of the first cantilever shaft 41 and the second cantilever shaft 42 with the body of the slide.

[0035] Specifically, Figure 1 As shown, the slide includes a first cantilever shaft 41 and a second cantilever shaft 42, the first cantilever shaft 41 and the second cantilever shaft 42 are respectively fixedly connected to the body of the slide, the first cantilever shaft 41 and the second cantilever shaft 42 are arranged parallel to each other, and the first cantilever shaft 41 and the second cantilever shaft 42 are perpendicular to the traction track, and one end of the first cantilever shaft 41 and the second cantilever shaft 42 extends from one side of the body of the slide. The brake frame 1 includes a bottom plate 101 and a connecting plate 102, the bottom plate 101 is parallel to the ground, the connecting plate 102 forms an obtuse angle with the bottom plate 101, the bottom end of the connecting plate 102 is fixedly connected to the first end of the bottom plate 101, and the top end of the connecting plate 102 is rotatably connected to the body of the slide through the first cantilever shaft 41. For example, the top end of the connecting plate 102 is sleeved on the outer wall of the first cantilever shaft 41, and the connecting plate 102 can rotate relative to the first cantilever shaft 41. The second cantilever shaft 42 is used to rotatably connect the body of the slide and the swing arm 3, and the top end of the swing arm 3 is rotatably sleeved on the second cantilever shaft 42, so that the swing arm 3 can rotate relative to the second cantilever shaft 42. The first end of the connecting rod position spiral spring 18 is fixedly sleeved with the first cantilever shaft 41, and the second end of the connecting rod position spiral spring 18 is fixedly connected to the connecting rod connecting shaft 19.

[0036] The first cantilever shaft 41 support includes a sleeve and a fastener. The sleeve is provided with a plurality of fastening holes. The fastening holes cooperate with the fasteners to fix the body of the slide. The sleeve is fixedly sleeved with the first cantilever shaft 41 to achieve a fixed connection between the first cantilever shaft 41 and the body of the slide. The second cantilever shaft 42 support adopts the same structure as the first cantilever shaft 41 support to achieve a fixed connection between the second cantilever shaft 42 and the body of the slide. The upper end of the connecting rod position spiral spring 18 also includes a spring fixing frame 5, which is used to fix the first cantilever shaft 41 and the connecting rod position spiral spring 18.

[0037] In some embodiments, the brake frame 1 includes a brake frame body and a brake pad 24 , and the brake pad 24 is fixedly disposed on the lower surface of the brake frame body.

[0038] Specifically, the brake frame body includes a bottom plate 101 and a connecting plate 102, and the brake pad 24 is arranged on the lower surface of the bottom plate 101, and the brake pad 24 is detachably connected to the bottom plate 101. For example, the brake pad 24 is fixedly bonded to the lower surface of the bottom plate 101, or the brake pad 24 is fixed to the lower surface of the bottom plate 101 by a fastening screw. In some embodiments, the brake pad 24 is composed of a plurality of slices, and the plurality of slices are sequentially arranged and covered on the lower surface of the bottom plate 101, and the plurality of slices are respectively fixedly connected to the lower surface of the bottom plate 101.

[0039] In some embodiments, the slider guide 28 includes a guide rod and a fixed plate, the fixed plate is vertically arranged on the upper surface of the brake frame 1, the fixed plate includes a first fixed plate and a second fixed plate parallel to each other, the axial direction of the guide rod is parallel to the upper surface of the brake plate, one end of the guide rod passes through the first fixed plate and is fixedly connected to the second fixed plate, and the sliding top block 2 is movably sleeved on the guide rod.

[0040] Specifically, Figure 1 As shown, the fixed plate adopts a flat plate structure, the fixed plate and the bottom plate 101 are perpendicular to each other, and the guide rod adopts a cylindrical rod. In some embodiments, the guide rod includes a first guide rod and a second guide rod parallel to each other. The guide rod is fixedly connected to the bottom plate 101 of the brake frame 1 through the first fixed plate and the second fixed plate. The length direction of the guide rod is parallel to the length direction of the brake plate, and the length direction of the brake plate is the connection direction of the first end and the second end of the brake plate. The sliding top block 2 is provided with a guide rod through hole, and the extension direction of the guide rod through hole is parallel to the length direction of the guide rod. In another real-time example, the slider guide rail 28 is a convex rib fixedly set on the upper surface of the bottom plate 101 of the brake frame 1, and the bottom of the sliding top block 2 is provided with a groove corresponding to the convex rib, and the groove is engaged with the convex rib, so that the sliding top block 2 can move back and forth along the convex rib.

[0041] In some embodiments, the top end of the driving member includes two first tooth grooves and two second tooth grooves, and the two first tooth grooves and the two second tooth grooves are arranged at intervals.

[0042] Specifically, Figure 1 As shown, the upper end of the driving member is a cylindrical structure, and the top of the cylindrical structure is provided with a first tooth groove and a second tooth groove, and the openings of the first tooth groove and the second tooth groove correspond to a quarter of the circumference of the cylindrical structure respectively. The top of the turntable lock 8 includes two braking rotating rods 25 and two brake releasing rotating rods 9, and the two braking rotating rods 25 and the two brake releasing rotating rods 9 are alternately arranged, and the two braking rotating rods 25 and the two brake releasing rotating rods 9 are respectively arranged at the connection of the first tooth groove and the second tooth groove.

[0043] In some embodiments, the driving member is a cam sleeve rod 13 , the top end of the cam sleeve rod 13 is provided with a first tooth groove and a second tooth groove, the bottom end of the cam sleeve rod 13 is provided with a cam 17 , and the cam 17 abuts against the upper connecting rod 16 .

[0044] Specifically, Figure 1 As shown, the turntable lock 8 cooperates with the turntable lock core shaft 27 so that the turntable lock 8 is rotatably connected to the turntable lock core shaft 27. The upper part of the cam sleeve 13 is a sleeve structure. The top end of the sleeve is open. The first tooth groove and the second tooth groove are provided on the wall at the top end of the sleeve. The depth direction of the first tooth groove and the second tooth groove is parallel to the axis of the sleeve. A guide rod is fixedly provided at the bottom end of the sleeve. The top end of the guide rod is fixedly connected to the sleeve. A cam 17 is provided at the bottom end of the guide rod. The guide rod is parallel to the axis of the sleeve. The cam 17 can roll along the length direction of the upper connecting rod 16.

[0045] In some embodiments, the slide includes a turntable lock core shaft connecting arm 10, the turntable lock core shaft 27 is fixedly connected to the turntable lock core shaft connecting arm 10, the cam sleeve 13 is sleeved with the turntable lock core shaft 27, a guide rail through hole is opened on the cam sleeve 13, the guide rail through hole is parallel in the vertical direction, and the guide rail through hole is strip-shaped. The end of the turntable lock core shaft connecting arm 10 passes through one side of the guide rail through hole and passes out from the other side of the guide rail through hole.

[0046] Specifically, Figure 1As shown, a rotary lock spindle connecting arm 10 is fixedly arranged on the slide, and the rotary lock spindle connecting arm 10 is arranged between the first cantilever shaft 41 and the second cantilever shaft 42, and the rotary lock spindle connecting arm 10 is arranged parallel to the first cantilever shaft 41 and the second cantilever shaft 42. A guide rail through hole is opened on the sleeve structure of the cam sleeve 13, and the first end of the rotary lock spindle connecting arm 10 is fixedly connected to the body of the slide through the connecting arm support 11, and the second end of the rotary lock spindle connecting arm 10 extends from the guide rail through hole into the sleeve structure of the cam sleeve 13, and is fixedly connected to the rotary lock spindle 27 sleeved on the sleeve structure of the cam sleeve 13. The sleeve structure of the cam sleeve 13 is sleeved with the rotary lock spindle connecting arm 10 through the guide rail through hole, so that the cam sleeve 13 moves between the third position and the fourth position. In some embodiments, the guide rail through hole includes an identical first guide rail through hole and a second guide rail through hole, the first guide rail through hole and the second guide rail through hole are symmetrical about the axis of the cam sleeve 13, the connecting line of the first guide rail through hole and the second guide rail through hole is colinear with the axis of the turntable lock core shaft connecting arm 10, the second end of the turntable lock core shaft connecting arm 10 passes through the first guide rail through hole, the turntable lock core shaft 27 and the second guide rail through hole in sequence, the turntable lock core shaft connecting arm 10 is fixedly connected to the turntable lock core shaft 27, and the turntable lock core shaft connecting arm 10 is movably socketed with the first guide rail through hole and the second guide rail through hole, respectively.

[0047] In some embodiments, the swing arm 3 includes a first swing arm, a second swing arm, and a lower connecting rod fixed shaft 22. The first swing arm and the second swing arm are arranged in parallel. The top ends of the first swing arm and the second swing arm are rotatably connected to the slide, and the bottom ends of the first swing arm and the second swing arm are rotatably connected to the sliding top block 2 respectively. The lower connecting rod fixed shaft 22 is arranged between the first swing arm and the second swing arm, and the two ends of the lower connecting rod fixed shaft 22 are respectively fixedly connected to the first swing arm and the second swing arm, and the lower connecting rod 20 is rotatably connected to the lower connecting rod fixed shaft.

[0048] Specifically, Figure 1 As shown, the first swing rod and the second swing rod adopt the same structure, and the top ends of the first swing rod and the second swing rod are respectively sleeved with the first cantilever shaft 41, so that the first swing rod and the second swing rod rotate around the first cantilever shaft 41. In some embodiments, the top end of the sliding top block 2 is provided with a rotation shaft, and the rotation shaft is parallel to the first cantilever shaft 41. The bottom ends of the first swing rod and the second swing rod are sleeved with the rotation shaft to realize the rotatable connection of the sliding top block 2 relative to the swing arm 3. The two ends of the lower connecting rod fixed shaft 22 are respectively fixedly connected to the first swing rod and the second swing rod, and the lower connecting rod fixed shaft 22 is parallel to the first cantilever shaft 41 and the rotation shaft of the sliding top block 2. The lower connecting rod fixed shaft is arranged between the first cantilever shaft 41 and the rotation shaft of the sliding top block 2. The bottom end of the lower connecting rod 20 is sleeved with the lower connecting rod fixed shaft 22, so that the lower connecting rod 20 can rotate relative to the lower connecting rod fixed shaft 22.

[0049] In another embodiment, the swing arm 3 adopts a single swing rod structure, the top end of the single swing rod is rotatably sleeved with the first cantilever shaft 41, and the bottom end of the single swing rod is rotatably sleeved with the top rotation shaft of the sliding top block 2. A lower connecting rod fixed shaft 22 is fixedly arranged in the middle of the single swing rod, and the bottom end of the lower connecting rod 20 is rotatably sleeved with the lower connecting rod fixed shaft 22.

[0050] In some embodiments, a first limit block is provided at the second end of the upper connecting rod 16, and a second limit block is provided at the first end of the lower connecting rod 20. When the upper connecting rod 16 and the lower connecting rod 20 are collinear, the lower surface of the first limit block and the upper surface of the second limit block abut against each other.

[0051] Specifically, Figure 1 As shown, the slide also includes an upper connecting rod 14, a first end of the upper connecting rod 14 is fixedly connected to the slide body through an upper connecting rod support 12, a second end of the upper connecting rod 14 extends from one side of the slide body, the upper connecting rod 14 is parallel to the first cantilever shaft 41, and the upper connecting rod 14 is arranged between the second cantilever shaft 42 and the turntable lock core shaft connecting arm 10.

[0052] The upper connecting rod 16 adopts a double-rod structure arranged in parallel, with the inner rod and the outer rod fixedly connected, the inner rod being arranged between the outer rod and the body of the slide, the top ends of the inner rod and the outer rod being rotatably sleeved with the upper connecting rod 14, and the bottom ends of the inner rod and the outer rod being rotatably sleeved with the connecting rod connecting shaft 19, the first limit block being fixedly connected between the inner rod and the outer rod, the lower surface of the first limit block being rectangular, the lower surface of the first limit block being parallel to the length direction of the upper connecting rod 16, the bottom end of the first limit block being tangent to the connecting rod connecting shaft 19, when the lower surface of the first limit block and the upper surface of the second limit block abut against each other, the first limit block is located between the connecting rod connecting shaft 19 and the upper connecting rod 14, and the lower surface of the first limit block and the upper surface of the second limit block are coplanar with the axis of the connecting rod connecting shaft 19. The second limit block is arranged at the top end of the lower connecting rod 20 . When the upper connecting rod 16 and the lower connecting rod 20 are in the same line, the second limit block is located between the connecting rod connecting shaft 19 and the upper connecting rod 14 .

[0053] Example 1

[0054] The brake lever 21 or (release the brake lever 15) drives the turntable lock 8 to rotate: when the slide is towed by the miniature tractor trailer and moves forward along the traction guide rail, it will first pass the brake lever 21. At this time, the brake rotating rod 2525 is moved by the brake lever 21, and the brake rotating rod 25 drives the turntable lock 8 to rotate. The rotation of the turntable lock 8 causes the upper connecting rod 16 to rotate back and forth. The lower end of the turntable lock 8 has special driving teeth, which cooperate with the first groove and the second groove structure at the upper end of the cam sleeve rod 13. At the same time, combined with the axial force of the cam 17, the cam sleeve rod 13 will reciprocate up and down, and the turntable lock 8 will be locked at the rotation interval of 90°. Based on the above transmission mechanism, when the brake rotating rod 25 is moved by the brake lever 21, the cam sleeve rod 13 will move up and down, thereby driving the upper connecting rod 16 to rotate back and forth.

[0055] The slide is connected to the traction trailer, and the controller is used to control the traction trailer to move along the guide rail. The brake lever 21 and the brake release lever 14 are arranged on one side of the guide rail. The brake mechanism is fixedly connected to the slide, the brake frame 1 is rotatably connected to the slide, the brake frame 1 is fixedly connected to the slide through the cantilever shaft support 6, the swing arm 3 is rotatably connected to the cantilever shaft 4, and when the swing arm 3 rotates, it drives the sliding top block 2 to move, and the sliding top block 2 is slidably connected to the slider guide rail 28 of the brake frame 1.

[0056] The brake lever 21 drives the turntable lock 8 to rotate. When the slide is towed by the towing trailer and moves forward along the towing guide rail, the brake lever 21 passes through the brake lever 21, and the brake rotating lever 25 of the brake mechanism is moved by the brake lever 21, and the brake rotating lever 25 drives the turntable lock 8 to rotate.

[0057] The rotational movement of the turntable lock 8 causes the upper connecting rod 16 to rotate back and forth. The lower end of the turntable lock 8 has a driving tooth structure, which cooperates with the groove structure at the upper end of the cam sleeve rod 13. At the same time, the axial force of the structural cam 17 causes the cam sleeve rod 13 to reciprocate up and down, so that the turntable lock 8 will be locked at the rotation interval of 90°.

[0058] The reciprocating motion of the upper connecting rod 16 causes the brake frame 1 to rise from the ground (such as Figure 5 as shown) and falling (as Figure 6 As shown in the figure, the rotation of the upper connecting rod 16 is transmitted through the connecting rod connecting shaft 19, the lower connecting rod 20 and the lower connecting rod fixed shaft 22, so that the swing arm 3 rotates. The swing arm 3 rotates and drives the sliding top block 2 to move. Since the sliding top block 2 is slidably connected to the sliding guide rail of the brake frame 1, it drives the brake frame 1 to rotate upward, realizing the contact and separation of the brake pad 24 with the ground. Based on the above principle, when the brake pad 24 contacts the ground, it means that the braking starts, and when the brake pad 24 separates from the ground, it means that the braking ends.

[0059] like Figure 4As shown, the upper connecting rod 6 and the lower connecting rod 20 can realize unidirectional reverse rotation of the upper connecting rod 6 through the first limit block and the second limit block. In addition, under the tension of the connecting rod position return spring 18, the first limit block and the second limit block abut against each other to lock the axes of the upper connecting rod 6 and the lower connecting rod 20 in a straight position.

[0060] On the other hand, a braking pulley collision system debugging method is provided, using any of the above braking pulley equipment collision systems, the braking pulley equipment collision system also includes a hydraulic brake mechanism, including:

[0061] A target acceleration curve is obtained, where the target acceleration curve includes a braking acceleration curve and a collision acceleration curve.

[0062] Specifically, Figure 7 As shown, the known conditions of the test are: the coordinate x in the X direction of the center line of the traction track at the collision point of the test slide c , mass of test slide m in , acceleration-time curve of the simulated object (vehicle): a tar (t), assuming that the collision starts at t = 0 and the pre-braking ends at t o The same time as the collision start time, that is, t o =0, where t b ~t o is the pre-braking stage curve, t o ~t end is the collision phase curve.

[0063] Determine the braking starting point and braking ending point according to the braking acceleration curve, obtain the slide disengagement distance, and determine the slide disengagement point according to the slide disengagement distance and the braking starting point. The braking starting point is used to set the brake lever, the braking ending point is used to set the brake release lever, and the slide disengagement point and braking ending point are used to set the slide disengagement mechanism.

[0064] Specifically, the brake pad material of the brake mechanism (this parameter will determine the magnitude of the pre-brake acceleration). The brake pad material model is determined according to a tar (t) at t b ~t o Segment size A b , select the friction plate of suitable material model.

[0065] Pre-force acceleration (deceleration) speed A b The relationship between the friction coefficient μ of the brake pad and the ground is as follows:

[0066] F=m×A b ,

[0067] A bis the pre-braking acceleration (input), where F is the sliding friction force F,

[0068] F=μ×Fn,

[0069] Fn=G,

[0070] G is the weight of the slide itself,

[0071] G = m × g,

[0072] m is the mass of the test slide (input);

[0073] Therefore: m×A b =μ×Fn=μ×m×g;

[0074] Therefore: A b =μ×g,

[0075] That is, the pre-brake acceleration is mainly determined by the friction coefficient μ of the friction plate relative to the ground, so the pre-brake acceleration A can be determined by selecting friction plates of different materials. b For example, the pre-braking of a vehicle through AEB has an acceleration magnitude (absolute value) ranging from 0.6g to 1g.

[0076] Braking starting point x b The coordinate of the brake lever installation position projected on the X direction of the traction track centerline. Braking end point x o It is the coordinate of the installation position of the brake release lever projected on the X direction of the center line of the traction track.

[0077] Braking starting point x b The calculation formula is as follows:

[0078]

[0079] Get the distance B between the slide disengagement point and the brake end point in the X direction, the slide disengagement point x t is the coordinate of the installation position of the slide disengagement mechanism in the X direction of the traction track centerline. Specifically, the calculation formula of the slide disengagement point is: t =x b –B.

[0080] The collision speed is determined according to the collision acceleration curve, and the input acceleration curve is generated according to the collision speed and the collision acceleration curve.

[0081] Specifically, calculate the speed V0 required for simulating a collision,

[0082]

[0083] Using the existing slide function, according to V0 and t o ~tend Curve a is the collision stage tar (t) Draw the first acceleration curve a input to the device in (t).a in (t) is used to control the input acceleration-time of the hydraulic brake mechanism. The existing brake-type simulated collision equipment can use the curve to allow the test slide to simulate the acceleration (deceleration) movement of the vehicle during the collision stage.

[0084] The hydraulic brake mechanism is controlled to perform a test test and obtain a test acceleration curve according to the slide mass and the input acceleration curve; the test acceleration curve is compared with the target acceleration curve, and when the difference between the test acceleration curve and the target acceleration curve is less than or equal to a preset threshold, a collision test is performed; when the difference between the test acceleration curve and the target acceleration curve is greater than the preset threshold, the input acceleration curve is re-determined.

[0085] Specifically, the input acceleration curve is input to the brake pulley equipment control unit, and the test experiment is started, and the actual test acceleration curve a of the slide is collected by the acceleration sensor. out (t). When the difference between the test acceleration curve and the target acceleration curve is less than or equal to the preset threshold, the test acceleration curve is judged to be qualified, and the pre-brake-collision test is started. When the difference between the test acceleration curve and the target acceleration curve is greater than the preset threshold, the test acceleration curve is judged to be unqualified, and the input acceleration curve is regenerated and the test is repeated until the difference between the test acceleration curve and the target acceleration curve is less than or equal to the preset threshold.

[0086] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.

Claims

1. A braking pulley collision system, characterized in that: include: A slide table, the slide table is used for fixedly connecting the test vehicle body; A brake frame, wherein a first end of the brake frame is rotatably connected to the slide, so that the brake frame rotates between a first position and a second position, and a lower surface of the brake frame abuts against the ground at the first position and leaves the ground at the second position; A traction mechanism, the traction mechanism comprising a swing arm and a sliding top block, the first end of the swing arm is rotatably connected to the slide, the second end of the swing arm is rotatably connected to the sliding top block, and the sliding top block is movably connected to the upper surface of the brake frame; The brake frame driving mechanism comprises a brake lever and a brake release lever, wherein the brake lever and the brake release lever are fixedly arranged on the first side of the slide in sequence, and the brake frame driving mechanism also comprises a turntable lock, a driving member and a turntable lock core shaft, the brake rotating rod and the brake release rotating rod are fixedly arranged on the top end of the turntable lock, and a driving tooth is fixedly arranged on the bottom end of the turntable lock, and a first tooth groove and a second tooth groove are arranged on the top end of the driving member, and the driving member is movably arranged below the turntable lock, and the turntable lock rotates when the brake rotating rod and the brake release rotating rod respectively abut against the brake lever and the brake release lever, and the driving tooth is clamped with the first tooth groove and the second tooth groove in sequence, and the driving member moves between a third position and a fourth position, and the turntable lock core shaft is rotatably connected to the turntable lock, and the turntable lock core shaft is movably connected to the driving member, and the turntable lock core shaft is fixedly connected to the slide; A connecting rod mechanism, the connecting rod mechanism includes an upper connecting rod, a lower connecting rod, a connecting rod connecting shaft and a connecting rod position return spring, the first end of the upper connecting rod is rotatably connected to the slide, the second end of the upper connecting rod and the first end of the lower connecting rod are rotatably connected through the connecting rod connecting shaft, the second end of the lower connecting rod is rotatably connected to the swing arm, the first end of the connecting rod position return spring is fixedly connected to the slide, the second end of the connecting rod position return spring is fixedly connected to the connecting rod connecting shaft, and the bottom end of the driving member abuts against the upper connecting rod.

2. The system according to claim 1, characterized in that The slide also includes a first cantilever shaft and a second cantilever shaft, one end of the first cantilever shaft and the second cantilever shaft respectively extend from one side of the slide, the first cantilever shaft and the second cantilever shaft are arranged parallel to each other, the first cantilever shaft is used to rotatably connect the swing arm, and the second cantilever shaft is used to rotatably connect the brake frame, the slide also includes a first cantilever shaft support and a second cantilever shaft support, the first cantilever shaft support and the second cantilever shaft support are respectively used to fix the first cantilever shaft and the second cantilever shaft to the body of the slide.

3. The system according to claim 1, characterized in that The brake frame comprises a brake frame body and a brake pad, and the brake pad is fixedly arranged on the lower surface of the brake frame body.

4. The system according to claim 3, characterized in that The slider guide rail includes a guide rod and a fixed plate, the fixed plate is vertically arranged on the upper surface of the brake frame, the fixed plate includes a first fixed plate and a second fixed plate parallel to each other, the axial direction of the guide rod is parallel to the upper surface of the brake plate, one end of the guide rod passes through the first fixed plate and is fixedly connected to the second fixed plate, and the sliding top block is movably sleeved on the guide rod.

5. The system according to claim 1, characterized in that The top end of the driving member includes two first tooth grooves and two second tooth grooves, and the two first tooth grooves and the two second tooth grooves are arranged at intervals.

6. The system according to claim 5, characterized in that The driving member is a cam sleeve rod, the top end of the cam sleeve rod is provided with the first tooth groove and the second tooth groove, the bottom end of the cam sleeve rod is provided with a cam, and the cam abuts against the upper connecting rod.

7. The system according to claim 6, characterized in that The slide includes a turntable lock core shaft connecting arm, the turntable lock core shaft is fixedly connected to the turntable lock core shaft connecting arm, the cam sleeve is sleeved with the turntable lock core shaft, a guide rail through hole is opened on the cam sleeve, the guide rail through hole is parallel in the vertical direction, and the guide rail through hole is strip-shaped, and the end of the turntable lock core shaft connecting arm passes through one side of the guide rail through hole and passes out from the other side of the guide rail through hole.

8. The system according to claim 7, characterized in that The swing arm includes a first swing arm, a second swing arm, and a lower connecting rod fixed shaft. The first swing arm and the second swing arm are arranged in parallel. The top ends of the first swing arm and the second swing arm are rotatably connected to the slide table. The bottom ends of the first swing arm and the second swing arm are rotatably connected to the sliding top block respectively. The lower connecting rod fixed shaft is arranged between the first swing arm and the second swing arm. The two ends of the lower connecting rod fixed shaft are fixedly connected to the first swing arm and the second swing arm respectively. The lower connecting rod is rotatably connected to the lower connecting rod fixed shaft.

9. The system according to claim 8, characterized in that The second end of the upper connecting rod is provided with a first limit block, and the first end of the lower connecting rod is provided with a second limit block. When the upper connecting rod and the lower connecting rod are collinear, the lower surface of the first limit block and the upper surface of the second limit block abut against each other.

10. A method for debugging a brake-type pulley collision system, using the brake-type pulley collision system according to any one of claims 1 to 9, wherein the brake-type pulley collision system further comprises a hydraulic brake mechanism, characterized in that: include: Acquiring a target acceleration curve, wherein the target acceleration curve includes a braking acceleration curve and a collision acceleration curve; Determine the braking start point and the braking end point according to the braking acceleration curve, obtain the slide disengagement distance, determine the slide disengagement point according to the slide disengagement distance and the braking start point, the braking start point is used to set the brake lever, the braking end point is used to set the brake release lever, and the slide disengagement point and braking end point are used to set the slide disengagement mechanism; determining a collision speed according to the collision acceleration curve, and generating an input acceleration curve according to the collision speed and the collision acceleration curve; Controlling the hydraulic brake mechanism to perform a test according to the mass of the slide and the input acceleration curve and obtaining a test acceleration curve; The test acceleration curve is compared with the target acceleration curve. When the difference between the test acceleration curve and the target acceleration curve is less than or equal to a preset threshold, a collision test is performed. When the difference between the test acceleration curve and the target acceleration curve is greater than the preset threshold, the input acceleration curve is re-determined.

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