A forklift accelerator pedal angle and stroke testing method and measuring device

Abstract

The invention discloses a method for testing the angle and stroke of a forklift accelerator pedal, comprising the following steps: S1, detecting an initial angle α1 of a forklift accelerator pedal in an initial state, and calculating a horizontal and vertical distance X1, Y1 between a measuring point and a rotation center of the accelerator pedal; S2, stepping on the accelerator pedal, causing the accelerator pedal to rotate around the rotation center by a certain angle, detecting a pedal angle α2 in a current state, and calculating a horizontal and vertical distance X2, Y2 between a measuring point on the accelerator pedal and the rotation center of the accelerator pedal; S3, calculating a stroke variation Z of the accelerator pedal according to the horizontal and vertical distances X1, Y1 between a measuring point and the rotation center of the accelerator pedal in the initial state of the accelerator pedal in S1 and the horizontal and vertical distances X2, Y2 between a measuring point and the rotation center of the accelerator pedal in the current state in S2; the application solves the problems of complex angle and stroke measurement of a forklift accelerator pedal, multiple sensors, poor interchangeability, and incomplete test data.

Description

Technical Field

[0001] The invention relates to a forklift accelerator pedal measuring device, in particular to a forklift accelerator pedal angle and stroke testing method and measuring device. Background Art

[0002] When a forklift is driving, it mainly relies on the accelerator pedal to control the vehicle speed. The accelerator pedal angle and stroke have an important impact on the vehicle's control. Therefore, real-time measurement of the accelerator pedal angle and stroke is of great significance.

[0003] The existing accelerator pedal angle and stroke test device and method are mainly completed by angle sensors, displacement sensors, data processing equipment and related tooling. This method requires the use of angle sensors and displacement sensors, which are costly and complex in structure. In addition, the installation tooling of the angle and displacement sensors varies from vehicle to vehicle, with high space requirements and poor interchangeability, and cannot meet the needs of rapid measurement of the accelerator pedal angle and stroke of existing forklifts. Summary of the invention

[0004] The object of the present invention is to provide a forklift accelerator pedal angle and stroke testing method and measuring device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for testing the angle and stroke of a forklift accelerator pedal, comprising the following steps:

[0007] S1, detecting the initial angle α1 of the accelerator pedal of the forklift in the initial state, and calculating the horizontal and vertical distances X1 and Y1 of a measuring point on the accelerator pedal from the rotation center of the accelerator pedal according to the initial angle α1;

[0008] S2, stepping on the accelerator pedal, the accelerator pedal rotates a certain angle around the rotation center, detecting the pedal angle α2 in the current state, and calculating the horizontal and vertical distances X2 and Y2 of the measuring point on the accelerator pedal from the rotation center of the accelerator pedal according to the current pedal angle α2;

[0009] S3. Calculate the accelerator pedal stroke change Z based on the horizontal and vertical distances X1 and Y1 of the measuring point from the accelerator pedal rotation center in the initial state of the accelerator pedal in S1 and the horizontal and vertical distances X2 and Y2 of the measuring point from the accelerator pedal rotation center in the current state in S2.

[0010] As a further solution of the present invention: a displacement sensor is vertically connected to the rear side of the accelerator pedal, and the displacement sensor is fixedly connected to a measuring point on the accelerator pedal.

[0011] As a further embodiment of the present invention:

[0012] The measurement formula of the pedal initial angle α1 is: α1=arctan[(L1-S1+L2) / L)], and the measurement formula of the pedal angle α2 in the current state is: α2=arctan[(L1-S2+L2) / L)];

[0013] Wherein, L1 is the length of the telescopic rod of the displacement sensor on the accelerator pedal 1, L2 is the distance between the telescopic rod of the displacement sensor and the measuring point, and S1 and S2 are the initial telescopic amount and the current telescopic amount of the telescopic rod of the displacement sensor.

[0014] As a further solution of the present invention: the calculation formulas for the horizontal and vertical distances X1 and Y1 from the measuring point in S1 to the rotation center of the accelerator pedal are:

[0015] X1=cosα1*L=cos{arctan[(L1-S1+L2) / L)]}*L;

[0016] Y1=sinα1*L=sin{arctan[(L1-S1+L2) / L)]}*L.

[0017] As a further solution of the present invention: the calculation formulas for the horizontal and vertical distances X2 and Y2 from the measuring point in S2 to the rotation center of the accelerator pedal are:

[0018] X2=cosα2*L=cos{arctan[(L1-S2+L2) / L]}*L;

[0019] Y2=sinα2*L=sin{arctan[(L1-S2+L2) / L]}*L.

[0020] As a further solution of the present invention: the calculation formula of the travel change Z of the accelerator pedal 1 in S3 is Z=(X 2 +Y 2 ) 1 / 2 , where X=X1-X2; Y=Y1-Y2.

[0021] A forklift accelerator pedal angle and stroke measuring device comprises an accelerator pedal, a displacement sensor is fixedly connected to the rear end of the accelerator pedal, the displacement sensor is vertically connected to the accelerator pedal, a horizontal plate is provided at one end of the displacement sensor away from the accelerator pedal, and the displacement sensor is horizontally slidably connected to the horizontal plate.

[0022] As a further solution of the present invention: a support plate is fixedly connected to the accelerator pedal, one end of the support plate is fixedly connected to the accelerator pedal through a first fixing plate and a second fixing plate, and one end of the support plate close to the displacement sensor is provided with a third fixing plate and a fourth fixing plate for fixing the displacement sensor.

[0023] As a further solution of the present invention: the displacement sensor is connected to a data acquisition and processing system.

[0024] As a further solution of the present invention: a bottom plate is fixedly connected below the horizontal flat plate.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. This application sets a displacement sensor, collects data from the displacement sensor, and uses corresponding technical formulas to obtain the parameters of the accelerator pedal, thereby solving the current problems of complex angle and stroke measurement of the accelerator pedal of a forklift, multiple sensors, poor interchangeability, and incomplete test data.

[0027] 2. This application provides more comprehensive data for the study of forklift handling characteristics through accurate and comprehensive measurement of accelerator pedal angle and stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the accelerator pedal and test fixture structure of this embodiment;

[0029] Figure 2 This is a schematic diagram of the accelerator pedal detection position in this embodiment.

[0030] In the figure: 1-accelerator pedal, 2-first fixed plate, 3-second fixed plate, 4-third fixed plate, 5-fourth fixed plate, 6-displacement sensor, 7-horizontal plate, 8-bottom plate, 9-data acquisition and processing system. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-2 , a forklift accelerator pedal angle and stroke testing method, comprising the following steps:

[0033] S1, a displacement sensor 6 is vertically connected to the rear side of the accelerator pedal 1, and the displacement sensor 6 is fixedly connected to the measuring point on the accelerator pedal 1 to detect the initial angle α1 of the forklift accelerator pedal 1 in the initial state, and the horizontal and vertical distances X1 and Y1 of a measuring point on the accelerator pedal 1 from the rotation center of the accelerator pedal are calculated according to the initial angle α1 of the pedal; the measurement formula of the initial angle α1 of the pedal is: α1 = arctan [(L1-S1+L2) / L)], and the measurement formula of the pedal angle α2 in the current state is: α2 = arctan [(L1-S2+L2) / L)]; wherein L1 is the length of the telescopic rod of the displacement sensor 6 on the accelerator pedal 1, L2 is the distance between the telescopic rod of the displacement sensor 6 and the measuring point, and S1 and S2 are the initial telescopic amount and the current telescopic amount of the telescopic rod of the displacement sensor 6;

[0034] The calculation formulas for the horizontal and vertical distances X1 and Y1 from the measuring point in S1 to the rotation center of the accelerator pedal are:

[0035] X1=cosα1*L=cos{arctan[(L1-S1+L2) / L)]}*L;

[0036] Y1=sinα1*L=sin{arctan[(L1-S1+L2) / L)]}*L.

[0037] S2, stepping on the accelerator pedal 1, the accelerator pedal 1 rotates a certain angle around the rotation center, detecting the pedal angle α2 in the current state, and calculating the horizontal and vertical distances X2 and Y2 between the measuring point on the accelerator pedal 1 and the rotation center of the accelerator pedal according to the current pedal angle α2;

[0038] The calculation formulas for the horizontal and vertical distances X2 and Y2 from the measuring point in S2 to the rotation center of the accelerator pedal are:

[0039] X2=cosα2*L=cos{arctan[(L1-S2+L2) / L]}*L;

[0040] Y2=sinα2*L=sin{arctan[(L1-S2+L2) / L]}*L

[0041] S3, calculate the stroke change Z of the accelerator pedal 1 according to the horizontal and vertical distances X1, Y1 of the measuring point from the accelerator pedal rotation center in the initial state of the accelerator pedal in S1 and the horizontal and vertical distances X2, Y2 of the measuring point from the accelerator pedal rotation center in the current state in S2; the calculation formula of the stroke change Z of the accelerator pedal 1 in S3 is Z=(X 2 +Y 2 ) 1 / 2 , where X=X1-X2; Y=Y1-Y2.

[0042] Example 1

[0043] A support plate is fixedly connected to the accelerator pedal 1, one end of the support plate is fixedly connected to the accelerator pedal 1 through a first fixed plate 2 and a second fixed plate 3, and an end of the support plate close to the displacement sensor 6 is provided with a third fixed plate 4 and a fourth fixed plate 5 for fixing the displacement sensor 6. Data acquisition and processing is realized through a data acquisition and processing system 9.

[0044] The first fixing plate 2 and the second fixing plate 3 are fastened by bolts to clamp the accelerator pedal 1, wherein the horizontal end of the first fixing plate 2 is kept horizontal after being clamped with the upper surface of the accelerator pedal 1; the third fixing plate 4 and the fourth fixing plate 5 are fastened by bolts to clamp the displacement sensor 6, and the third fixing plate 4 and the fourth fixing plate 5 are fixed to the support plate by bolts, and after the displacement sensor 6 is clamped, its fixed end is kept vertical to the horizontal end of the support plate. The telescopic end of the external telescopic rod of the displacement sensor 6 is in contact with the horizontal flat plate 7, and the displacement sensor 6 has a certain amount of compression on the horizontal flat plate 7. The bottom plate 8 is connected and fastened with the horizontal smooth flat plate 7 by bolts. The bottom plate 8 is placed on the bottom plate of the forklift, and the bottom plate 8 is fixed to the bottom plate of the forklift by a strong magnet. The upper surface of the horizontal smooth flat plate 7 and the rotation center of the accelerator pedal 1 are kept on the same horizontal plane.

[0045] See also Figure 2 , relevant dimension positions when the accelerator pedal is in the initial position.

[0046] When the accelerator pedal 1 is in the initial position, the displacement sensor 6 is fixed by the accelerator pedal 1 test fixture. After installation, the displacement sensor 6 needs to be perpendicular to the surface of the accelerator pedal 1. The telescopic end of the displacement sensor 6 is fixed on the horizontal plate 7 to ensure that the telescopic end of the displacement sensor 6 can move freely on the horizontal plate 7. At this time, the displacement sensor 6 is compressed, and the compressed displacement S1 is input into the data acquisition and processing system 9. Then, the angle α1 of the accelerator pedal in the initial state is calculated by the known length L1 of the external telescopic rod of the displacement sensor 6, the distance L2 from the fixture fixing point to the external telescopic rod of the displacement sensor 6, and the distance L from the fixing point of the displacement sensor 6 to the rotation center of the accelerator pedal 1: α1 = arctan [(L1-S1+L2) / L];

[0047] The position of the measuring point in the initial state of the accelerator pedal 1 is calculated using the relevant trigonometric formula:

[0048] The horizontal distance X1 between the measuring point and the rotation center of the accelerator pedal 1 is:

[0049] X1=cosα1*L=cos{arctan[(L1-S1+L2) / L]}*L;

[0050] The vertical distance Y1 between the measuring point and the rotation center of the accelerator pedal 1 is:

[0051] Y1=sinα1*L=sin{arctan[(L1-S1+L2) / L]}*L.

[0052] When the accelerator pedal 1 is depressed, the compression amount S1 of the displacement sensor 6 will change continuously. When the compression amount of the displacement sensor 6 becomes S2, the angle of the accelerator pedal 1 can be calculated in real time according to the formula: α2=arctan[(L1-S2+L2) / L].

[0053] When the accelerator pedal 1 is pressed, the stroke change of the measuring point includes both horizontal displacement and vertical displacement as well as composite displacement. When the compression amount of the displacement sensor 6 becomes S2;

[0054] The horizontal distance X2 between the measuring point and the rotation center of the accelerator pedal 1 is:

[0055] X2=cosα2*L=cos{arctan[(L1-S2+L2) / L]}*L;

[0056] The vertical distance Y2 between the measuring point and the rotation center of the accelerator pedal 1 is:

[0057] Y2=sinα2*L=sin{arctan[(L1-S2+L2) / L]}*L;

[0058] In summary, the accelerator pedal 1 is at the measuring point:

[0059] Its stroke change in the horizontal direction is X: X = X1-X2;

[0060] Its travel change in the vertical direction Y: Y = Y1-Y2;

[0061] The total synthetic stroke change is Z: Z = (X 2 +Y 2 ) 1 / 2 .

[0062] The displacement sensor 6 is an external linear displacement sensor. The external telescopic rod can automatically reset after compression. It is not compressed in the normal state. The compression amount is used to analyze the angle and stroke of the accelerator pedal.

[0063] The selected data acquisition and processing system 9 can acquire both voltage output type analog quantities and current output type analog quantities, and can calculate angles and displacement strokes using relevant formulas.

[0064] The selected horizontal plate 7 needs to have a smooth and lubricated surface and be height-adjustable to ensure that it is level with the rotation center of the accelerator pedal 1 .

[0065] The selected accelerator pedal 1 test fixture can adapt to accelerator pedals of different thicknesses and can ensure that the displacement sensor 6 can be perpendicular to the surface of the accelerator pedal after installation.

[0066] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0067] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for testing the angle and stroke of a forklift accelerator pedal, characterized in that: The invention comprises an accelerator pedal (1), a displacement sensor (6) being fixedly connected to the rear end of the accelerator pedal (1), the displacement sensor (6) being vertically connected to the accelerator pedal (1), a horizontal plate (7) being provided at one end of the displacement sensor (6) away from the accelerator pedal (1), the displacement sensor (6) being horizontally slidably connected to the horizontal plate (7), and the displacement sensor (6) being fixedly connected to a measuring point on the accelerator pedal (1); The test method includes the following steps: S1, detecting an initial angle α1 of the accelerator pedal (1) of the forklift in an initial state, and calculating a horizontal and vertical distance X1, Y1 from a measuring point on the accelerator pedal (1) to a rotation center of the accelerator pedal according to the initial angle α1; S2, stepping on the accelerator pedal (1), the accelerator pedal (1) rotates a certain angle around the rotation center, detecting the pedal angle α2 in the current state, and calculating the horizontal and vertical distances X2 and Y2 between the measuring point on the accelerator pedal (1) and the rotation center of the accelerator pedal according to the current pedal angle α2; S3, calculating the stroke change Z of the accelerator pedal 1 according to the horizontal and vertical distances X1, Y1 of the measuring point from the accelerator pedal rotation center in the initial state of the accelerator pedal in S1 and the horizontal and vertical distances X2, Y2 of the measuring point from the accelerator pedal rotation center in the current state in S2; The measurement formula of the pedal initial angle α1 is: α1=arctan[(L1-S1+ L2) / L)], and the measurement formula of the pedal angle α2 in the current state is: α2=arctan[(L1-S2+ L2) / L)]; Wherein, L is the distance from the measuring point of the accelerator pedal to the rotation axis of the accelerator pedal along the length direction of the accelerator pedal, L1 is the length of the telescopic rod of the displacement sensor 6 on the accelerator pedal 1, L2 is the distance from the telescopic rod of the displacement sensor (6) to the measuring point, and S1 and S2 are the initial telescopic amount and current telescopic amount of the telescopic rod of the displacement sensor (6).

2. A forklift accelerator pedal angle and stroke testing method according to claim 1, characterized in that: The calculation formulas for the horizontal and vertical distances X1 and Y1 from the measuring point in S1 to the rotation center of the accelerator pedal are: X1= cosα1*L=cos{arctan[(L1-S1+ L2) / L)]}*L; Y1= sinα1*L=sin{arctan[(L1-S1+ L2) / L)]}*L.

3. A forklift accelerator pedal angle and stroke testing method according to claim 1, characterized in that: The calculation formulas for the horizontal and vertical distances X2 and Y2 from the measuring point in S2 to the rotation center of the accelerator pedal are: X2= cosα2*L=cos{arctan[(L1-S2+ L2) / L]}*L; Y2= sinα2*L=sin{arctan[(L1-S2+ L2) / L]}*L.

4. A forklift accelerator pedal angle and stroke testing method according to claim 1, characterized in that: The calculation formula of the travel change Z of the accelerator pedal (1) in S3 is Z=(X 2 +Y 2 ) 1 / 2 , where X=X1-X2; Y=Y1-Y2.

5. A forklift accelerator pedal angle and stroke testing method according to claim 1, wherein a support plate is fixedly connected to the accelerator pedal (1), one end of the support plate is fixedly connected to the accelerator pedal (1) through a first fixing plate (2) and a second fixing plate (3), and one end of the support plate close to the displacement sensor (6) is provided with a third fixing plate (4) and a fourth fixing plate (5) for fixedly connecting the displacement sensor (6).

6. A forklift accelerator pedal angle and stroke testing method according to claim 1, characterized in that: The displacement sensor (6) is connected to a data acquisition and processing system (9).

7. A forklift accelerator pedal angle and stroke testing method according to claim 1, characterized in that: A bottom plate (8) is fixedly connected below the horizontal flat plate (7).

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