Vehicle braking distance measuring device

Abstract

The utility model provides a device for measuring the braking distance of a vehicle, and aims to solve the technical problem that the conventional braking distance tester is inaccurate in measurement. The measuring device comprises: a first cylinder, a cylinder body of which is arranged on the outside of a vehicle body and a piston rod of which is arranged vertically downward; the mounting frame is arranged at the end of a piston rod of the first cylinder; one end of the bracket is rotationally arranged at one end of the mounting frame, and a spring is arranged between the other end of the bracket and the other end of the mounting frame; the roller is rotationally arranged at one end, provided with the spring, of the bracket; a cylinder body of the second cylinder is communicated with a cylinder body of the first cylinder through a pipeline, and a piston rod is in power connection with a brake pedal of the vehicle; wherein the roller is connected with a counter. The measuring device has the advantage of being capable of accurately measuring the set distance of the vehicle.

Description

Technical Field

[0001] The utility model relates to a vehicle performance testing device, in particular to a vehicle braking distance measuring device. Background Art

[0002] The main principle of the portable braking distance tester is to measure by contacting the grating encoder with the wheel, or fixing the instrument on the vehicle structure and making the grating encoder contact with the ground. The encoder calculates the speed and other parameters and converts them into speed and distance.

[0003] Both of these methods have certain problems in terms of usage and accuracy. The problem with the former is that the wheels have stopped rotating due to the action of the braking system, but the vehicle will continue to move forward for a distance due to inertia, which will cause the measured stopping distance to be too small. The problem with the latter is that the wheels of the grating encoder are against the ground. When the vehicle starts to move, the encoder will rotate along with it, thus affecting the measurement accuracy.

[0004] Measuring vehicle turning distance is an essential task during factory-based inspections of specialized motor vehicles, and it's a crucial indicator that directly impacts vehicle safety. Portable braking distance testers, which utilize a grating encoder in contact with the ground, are commonly used. However, these testers can suffer from inaccuracies when measuring specialized motor vehicles, particularly for forklifts, due to design and operating flaws. Utility Model Content

[0005] Aiming at the technical problem of inaccurate measurement in existing braking distance testers, the utility model provides a vehicle braking distance measuring device, which has the advantage of being able to accurately measure the vehicle's braking distance.

[0006] The technical solution of the utility model is:

[0007] A device for measuring vehicle braking distance, comprising:

[0008] A first cylinder, the cylinder body of which is arranged on the outside of the vehicle body and the piston rod of which is arranged vertically downward;

[0009] A mounting bracket, provided at the end of the piston rod of the first cylinder;

[0010] A bracket, one end of which is rotatably mounted on one end of the mounting frame, and a spring is provided between the other end of the bracket and the other end of the mounting frame;

[0011] A roller rotatably mounted on one end of the bracket having the spring;

[0012] The second cylinder has a cylinder body connected to the cylinder body of the first cylinder through a pipeline, and a piston rod thereof is dynamically connected to the brake pedal of the vehicle;

[0013] Wherein, the roller is connected with a counter.

[0014] Optionally, the mounting bracket is arranged in a horizontal direction, and the end of the bracket provided with the spring is arranged tilted downward.

[0015] Optionally, a connecting groove is provided in the middle of the mounting frame, and one end of the bracket is rotatably disposed on one end of the connecting groove.

[0016] Optionally, a spring is provided on each side of the bracket.

[0017] Optionally, a plurality of first cylinders are arranged parallel to each other on the mounting frame, and all of the first cylinders are connected to the second cylinder.

[0018] Optionally, it also includes:

[0019] A support seat is provided in the vehicle body and is close to the raised end of the brake pedal;

[0020] A movable wheel rotatably disposed at the bottom of the support seat;

[0021] A pull rope, one end of which is fixed to the raised end of the brake pedal and the other end of which is wound around the movable wheel;

[0022] a screw, one end of which is coaxially connected to one end of the movable wheel;

[0023] Wherein, a threaded hole is provided on the piston rod of the second cylinder. The threaded hole is coaxially arranged with the piston rod of the second cylinder, and the threaded hole matches the other end of the screw rod.

[0024] Optionally, the top end of the support seat is located above the brake pedal, and the pull rope is passed around the top end of the support seat.

[0025] Optionally, a guide wheel is provided at the top of the support seat, and the pull rope passes around the guide wheel.

[0026] Optionally, the movable wheel has a hexagonal hole at one end away from the screw rod.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] When the vehicle accelerates to a certain speed and needs to brake, the brake pedal is pressed. At this time, the brake pedal drives the piston rod of the second cylinder to move, and the medium in the cylinder body of the second cylinder is transported to the cylinder body of the first cylinder through the pipeline. At this time, the medium in the first cylinder pushes the piston rod of the first cylinder and drives the mounting frame to move downward, thereby driving the bracket and roller to move downward and make the roller contact with the ground, and then the distance measurement can begin.

[0029] In this technical solution, when the brake pedal is depressed, the roller immediately contacts the ground and begins measuring, resulting in high accuracy. Furthermore, the bracket and mounting frame are pivotally connected, with a spring interposed between them, enabling testing on uneven surfaces without damaging the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0032] Figure 2 It is a structural diagram of the utility model;

[0033] Figure 3 This is a structural diagram of the brake pedal. DETAILED DESCRIPTION

[0034] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0035] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0036] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0037] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] Example

[0039] See also Figure 1 、 Figure 2 and Figure 3 This embodiment discloses a device for measuring vehicle braking distance, including a first cylinder 11, a mounting bracket 12, a support 13, a spring 14, a roller 15, a second cylinder 21, and a counter (not shown). Specifically, the cylinder body of the first cylinder 11 is detachably mounted on the exterior of the vehicle body, and the piston rod of the first cylinder 11 is positioned vertically downward.

[0040] A mounting bracket 12 is fixedly mounted on the end of the piston rod of the first cylinder 11. The mounting bracket 12 is arranged horizontally. One end of the mounting bracket 12 is rotatably connected to one end of a bracket 13, and the other end of the bracket 13 is located below the other end of the mounting bracket 12, so that the bracket 13 is arranged in an inclined shape.

[0041] A spring 14 is provided between one end of the bracket 13 away from the mounting frame 12 and one end of the mounting frame 12 away from the bracket 13 , so that both ends of the spring 14 are fixedly provided at the end of the bracket 13 and the end of the mounting frame 12 respectively.

[0042] Furthermore, a U-shaped member is provided at the end of the bracket 13 away from the mounting frame 12. A roller 15 is disposed within the U-shaped member and is rotatably connected to the U-shaped member. The axis of the roller 15 lies in a horizontal plane. Furthermore, the shaft of the roller 15 is connected to a counter, and the rotation of the roller 15 drives the counter, thereby achieving the purpose of counting.

[0043] The cylinder body of the second cylinder 21 is detachably arranged inside the vehicle body, and the second cylinder 21 is close to the brake pedal 30. The piston rod of the second cylinder 21 is connected to the brake pedal 30 by power, and the piston rod can be driven by stepping on the brake pedal 30.

[0044] During the process of measuring the braking distance of the vehicle, when the vehicle accelerates to a certain speed and needs to brake, the brake pedal 30 is depressed. At this time, the brake pedal 30 drives the piston rod of the second cylinder 21 to move, and the medium in the cylinder body of the second cylinder 21 is transported to the cylinder body of the first cylinder 11 through the pipeline. At this time, the medium in the first cylinder 11 pushes the piston rod of the first cylinder 11 and drives the mounting frame 12 to move downward, thereby driving the bracket 13 and the roller 15 to move downward, and making the roller 15 contact the ground, and the distance measurement can begin.

[0045] In this technical solution, when the brake pedal 30 is depressed, the roller 15 immediately contacts the ground and begins measuring, resulting in high accuracy. Furthermore, the bracket 13 and mounting frame 12 are pivotally connected, with a spring 14 interposed between them. This allows testing on uneven surfaces, preventing damage to the device.

[0046] In one specific embodiment:

[0047] The mounting frame 12 and the headquarters have a connecting groove, and one end of the bracket 13 is rotatably set on one end in the connecting groove, so that both sides of the bracket 13 can be rotatably connected to the bracket 13, thereby improving the stability of the bracket 13.

[0048] In addition, a spring 14 is provided on both sides of the bracket 13 to ensure the stability of the roller 15.

[0049] Preferably, a plurality of first cylinders 11 are provided on the mounting frame 12 in parallel with each other, and all first cylinders 11 are connected to the second cylinder 21. By providing a plurality of first cylinders 11, the stability of the mounting frame 12 can be improved and maintained in a horizontal state.

[0050] In another specific embodiment:

[0051] The measuring device also includes a support base 22, a movable wheel 23, a pull rope 24 and a screw 25. Specifically, the support base 22 can be detachably installed in the vehicle body and is arranged in a vertical direction. The support base 22 is close to the raised end of the brake pedal 30 and there is a gap between it and the brake pedal 30.

[0052] The movable wheel 23 is rotatably disposed at the bottom of the support base 22 , and the axis of the movable wheel 23 is located on a horizontal plane.

[0053] One end of the pull rope 24 is mounted on the movable wheel 23, and the other end of the pull rope 24 is wound around the movable wheel 23 for multiple turns before passing over the top of the support base 22. The other end of the pull rope 24 is detachably mounted on the brake pedal 30. The pull rope 24 is in a stretched state between the brake pedal 30 and the movable wheel 23.

[0054] One end of the screw rod 25 is coaxially connected to one end of the movable wheel 23. A threaded hole is provided in the piston rod of the second cylinder 21. The axis of the threaded hole is colinear with the axis of the piston rod of the second cylinder 21, and the screw rod 25 is matched in the threaded hole.

[0055] In this embodiment, while waiting for the vehicle braking distance to be tested, the brake pedal 30 is in a tilted state, the pull rope 24 is wound around the movable wheel 23 for multiple turns, the piston rod of the second cylinder 21 is in an extended state, and most of the screw rod 25 is located in the threaded hole.

[0056] When the test starts, the brake pedal 30 is stepped on, and the raised end of the brake pedal 30 moves downward, pulling the pull rope 24, so that the pull rope 24 drives the movable wheel 23 to rotate, thereby driving the screw 25 to rotate. Through the thread matching relationship between the screw 25 and the piston rod of the second cylinder 21, the piston rod of the second cylinder 21 is driven to move into its cylinder body, so that the medium in the cylinder body of the second cylinder 21 enters the cylinder body of the first cylinder 11 along the pipeline.

[0057] Preferably, the top of the support base 22 is located above the brake pedal 30, and the pull cord 24 passes around the top of the support base 22. A guide wheel 26 is also provided at the top of the support base 22, and the pull cord 24 passes around the guide wheel 26. Designing the support base 22 to be higher than the highest point of the brake pedal 30 maximizes the length of the pull cord 24 when the brake pedal 30 drives the end of the pull cord 24 downward. The provision of the guide wheel 26 reduces the wear rate of the pull cord 24.

[0058] In addition, the end of the movable wheel 23 away from the screw rod 25 has a hexagonal hole. After the test is completed, the pull rope 24 can be wound around the movable wheel 23 again through the hexagonal hole.

[0059] In this embodiment, there is another advantage: after the brake pedal 30 is depressed, if an emergency situation arises and the brake pedal 30 needs to be released, the pull rope 24 is flexible and therefore will not hinder the rebound of the brake pedal 30 .

[0060] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A device for measuring vehicle braking distance, characterized in that: include: A first cylinder, the cylinder body of which is arranged on the outside of the vehicle body and the piston rod of which is arranged vertically downward; A mounting bracket, provided at the end of the piston rod of the first cylinder; A bracket, one end of which is rotatably mounted on one end of the mounting frame, and a spring is provided between the other end of the bracket and the other end of the mounting frame; A roller rotatably mounted on one end of the bracket having the spring; The second cylinder has a cylinder body connected to the cylinder body of the first cylinder through a pipeline, and a piston rod thereof is dynamically connected to the brake pedal of the vehicle; Wherein, the roller is connected with a counter.

2. The vehicle braking distance measuring device according to claim 1, characterized in that: The mounting frame is arranged in a horizontal direction, and one end of the bracket provided with the spring is arranged tilted downward.

3. The vehicle braking distance measuring device according to claim 1, characterized in that: A connecting groove is provided in the middle of the mounting frame, and one end of the bracket is rotatably arranged on one end of the connecting groove.

4. The vehicle braking distance measuring device according to claim 3, characterized in that: A spring is respectively provided on both sides of the bracket.

5. The vehicle braking distance measuring device according to claim 4, characterized in that: A plurality of first cylinders are arranged on the mounting frame in parallel with each other, and all of the first cylinders are connected to the second cylinder.

6. The vehicle braking distance measuring device according to claim 1, characterized in that: Also includes: A support seat is provided in the vehicle body and is close to the raised end of the brake pedal; A movable wheel rotatably disposed at the bottom of the support seat; A pull rope, one end of which is fixed to the raised end of the brake pedal and the other end of which is wound around the movable wheel; a screw, one end of which is coaxially connected to one end of the movable wheel; Wherein, a threaded hole is provided on the piston rod of the second cylinder. The threaded hole is coaxially arranged with the piston rod of the second cylinder, and the threaded hole matches the other end of the screw rod.

7. The vehicle braking distance measuring device according to claim 6, characterized in that: The top end of the support seat is located above the brake pedal, and the pull rope is passed around the top end of the support seat.

8. The vehicle braking distance measuring device according to claim 7, characterized in that: A guide wheel is provided at the top of the support seat, and the pull rope passes around the guide wheel.

9. The vehicle braking distance measuring device according to claim 6, characterized in that: The movable wheel has an inner hexagonal hole at one end away from the screw rod.

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