A forklift mast loading and unloading performance test system

Abstract

The application discloses a forklift mast loading and unloading performance test system, which comprises a vertical fixed column, a Z-direction sliding rail arranged at the front end of the fixed column, a Z-direction sliding block matched with the Z-direction sliding rail, a fixed support connected with the Z-direction sliding block and synchronous with the Z-direction sliding block, wherein the Z-direction sliding rail is provided with a first displacement detection mechanism for measuring the Z-direction displacement of the Z-direction sliding block, and the system further comprises an upper computer connected with the first displacement detection mechanism to acquire the Z-direction sliding block motion information according to the Z-direction displacement and motion time of the Z-direction sliding block, wherein the fixed support is used for detachable connection with a goods blocking shelf of a forklift mast. The forklift mast loading and unloading performance test system can improve the test efficiency, safety and test precision of the forklift mast.

Description

Technical Field

[0001] This invention relates to the field of forklift testing technology, and in particular to a forklift mast loading and unloading performance testing system. Background Technology

[0002] The forklift mast is the main load-bearing structure of the forklift's lifting device and the most distinctive feature of a forklift as a special-purpose vehicle. Therefore, testing the forklift mast is an important task for forklift manufacturers. For example, the relevant test parameters can guide users to operate the forklift safely within reasonable data ranges; or the test parameters can serve as guidance parameters for forklift development, directing the R&D team to improve related forklift structures.

[0003] With the development of forklift technology, current forklift testing primarily focuses on parameters such as maximum lifting height, lifting speed, mast tilting speed, load curves, and lifting speed curves. However, current forklift manufacturers generally rely on manual testing methods, such as manually recording data using stopwatches and calculating results. This manual approach is clearly inefficient and prone to errors. Furthermore, forklifts may tip over during load testing, and manual measurement could potentially lead to safety accidents.

[0004] Therefore, how to solve the problem of low efficiency and large error in forklift mast testing has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a forklift mast loading and unloading performance testing system that can improve the testing accuracy of forklift masts, the safety of the testing process, and the testing efficiency.

[0006] To achieve the above objectives, the present invention provides a forklift mast loading and unloading performance testing system, comprising a vertically arranged fixed column, a Z-axis slide rail located at the front end of the fixed column, a Z-axis slider cooperating with the Z-axis slide rail, and a fixed bracket connected to and synchronously raised and lowered with the Z-axis slider. The Z-axis slide rail is provided with a first displacement detection mechanism for measuring the Z-axis displacement of the Z-axis slider. The system also includes a host computer connected to the first displacement detection mechanism to obtain the Z-axis slider motion information based on the Z-axis displacement and movement time of the Z-axis slider. The fixed bracket is detachably connected to the forklift mast's retaining rack.

[0007] Optionally, the Z-axis slider is fixedly connected to a horizontally arranged Y-axis slide rail. The Y-axis slide rail is provided with a Y-axis slider and a second displacement detection mechanism for testing the Y-axis displacement of the Y-axis slider and connecting to the host computer. The fixed bracket is connected to the Z-axis slider through the Y-axis slider and the Y-axis slide rail.

[0008] Optionally, the Z-axis slide rail, the Z-axis slider, the Y-axis slide rail, and the Y-axis slider are all arranged in pairs. An X-axis slide rail is connected between a pair of Y-axis sliders. The X-axis slide rail is provided with an X-axis slider and a third displacement detection mechanism for detecting the X-axis displacement of the X-axis slider and connecting to the host computer. The fixed bracket is fixedly connected to the X-axis slider.

[0009] Optionally, the first displacement detection mechanism, the second displacement detection mechanism, and the third displacement detection mechanism are all magnetic scales, and the magnetic scales and the host computer are connected by a data transmitter signal.

[0010] Optionally, the fixed column includes a steel beam column and a crossbeam welded between adjacent steel beam columns.

[0011] Optionally, the top of the fixed column is provided with a limiting device to limit the Z-axis slider.

[0012] Optionally, it also includes a vibration isolation platform for parking the forklift to be tested, with the fixed column vertically welded to the vibration isolation platform.

[0013] Optionally, it also includes an annular vibration isolation groove formed on the ground around the vibration isolation platform.

[0014] Compared to the aforementioned background technology, the forklift mast loading and unloading performance testing system provided by this invention utilizes a fixed bracket connected to the stop rack of the forklift mast under test. When the forklift mast is lifted or lowered under no-load or load conditions, the fixed bracket follows the stop rack movement. Simultaneously, the fixed bracket drives the Z-axis slider to move. The Z-axis displacement of the slider is measured by a first displacement detection mechanism. The host computer obtains the start and end times of the Z-axis slider movement and can acquire or calculate the motion information of the forklift mast, such as lifting displacement, speed, and acceleration, as well as the descent distance (natural descent amount) after a preset suspension time under no-load or load conditions. It can also output dynamic motion graphics, reproducing the detailed data and graphics of the entire motion. The entire testing process does not require manual on-site measurement; simply connecting the stop rack of the forklift mast to the fixed bracket enables remote control and automatic measurement and calculation of relevant indicators reflecting the performance of the forklift mast, greatly improving the accuracy and safety of the test, while also increasing testing efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is an overall diagram of the forklift mast loading and unloading performance testing system provided by the present invention;

[0017] Figure 2 This is a partial structural diagram of the forklift mast loading and unloading performance testing system provided in an embodiment of the present invention;

[0018] Figure 3 for Figure 2 A diagram from another angle;

[0019] Figure 4 The speed and displacement curves of Z-axis lifting and lowering in the performance test of the forklift mast;

[0020] Figure 5 The curve showing the Z-axis displacement versus time during forklift mast performance testing;

[0021] Figure 6 This is the curve showing the speed change over time in the Z-axis direction during forklift mast performance testing.

[0022] in:

[0023] 1-Vibration isolation platform, 2-Fixed column, 3-X-direction slide rail, 4-Y-direction slide rail, 5-Z-direction slide rail, 6-X-direction slider, 7-Y-direction slider, 8-Z-direction slider, 9-X-direction magnetic scale, 10-Y-direction magnetic scale, 11-Z-direction magnetic scale, 12-Data transmitter, 13-Fixed bracket. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to Figures 1 to 3 , Figure 1 This is an overall diagram of the forklift mast loading and unloading performance testing system provided by the present invention. Figure 2 This is a partial structural diagram of the forklift mast loading and unloading performance testing system provided in an embodiment of the present invention. Figure 3 for Figure 2 A diagram from another angle.

[0027] This application discloses a forklift mast loading and unloading performance testing system to detect motion information such as speed, displacement, acceleration, and hovering descent distance (natural sliding distance) of the forklift mast during lifting and lowering under no-load and loaded conditions. The testing system includes a vertically mounted fixed column 2, with a Z-axis guide rail vertically mounted at the front end of the fixed column 2. A Z-axis slider 8 and a first displacement detection mechanism are installed within the Z-axis guide rail. The Z-axis slider 8 is connected to a fixed bracket 13, and the first displacement detection mechanism is signal-connected to a host computer. During testing, the fixed bracket 13 is connected to the stop rack of the forklift mast to be tested, and then the forklift mast is driven to lift and lower under a set load. The Z-axis slider 8 can then move synchronously with the fixed bracket 13 (i.e., the forklift mast) along the Z-axis guide rail 5. The first displacement detection mechanism measures the lifting and lowering displacement of the Z-axis slider 8, and simultaneously, the host computer can accurately acquire or calculate the motion information such as displacement, speed, and acceleration of the forklift mast based on the start time of the movement and the Z-axis displacement measured by the first displacement detection mechanism.

[0028] To improve testing safety and system stability, the system also includes a vibration isolation platform 1. The fixed columns 2 are vertically installed steel beams, with adjacent beams welded together. The fixed columns 2 are vertically welded to the vibration isolation platform 1. During forklift mast performance testing, the forklift under test moves and stops above the vibration isolation platform 1, allowing the mast's guardrail to be securely connected to the fixed support 13. During testing, the forklift is positioned above the vibration isolation platform 1 and against the fixed columns 2. The limiting protection provided by the fixed columns 2 effectively prevents the forklift from tipping over. The vibration isolation platform serves two purposes: firstly, it works in conjunction with the fixed columns 2 to protect the forklift under test, and secondly, it reduces the impact of external vibrations on testing accuracy. The platform is typically made of steel plate. Furthermore, the forklift mast loading and unloading performance testing system also includes an annular vibration damping groove created on the ground around the vibration isolation platform. This groove isolates the platform from the surrounding environment to a certain extent, reducing the impact of external construction on testing accuracy. The depth of the annular trench is usually no less than 50 cm, and the specific depth can be flexibly set according to the surrounding environment.

[0029] Furthermore, a limiting device is provided at the top of the fixed column 2, which is also the top of the Z-axis slide rail 5, to prevent the Z-axis slider 8 from sliding out of the Z-axis slide rail 5; of course, the length and height of the Z-axis slide rail 5 are usually set to be greater than the maximum lifting height of common forklifts to be tested, to avoid the problem of the Z-axis slide rail 5 slipping off.

[0030] In a further specific embodiment of the present invention, the forklift mast loading and unloading performance test further includes a horizontally arranged Y-axis slide rail 4. The Y-axis slide rail 4 is fixedly connected to or integrally formed with the Z-axis slider 8, so that the Y-axis slide rail 4 can move up and down together with the Z-axis slider 8. A Y-axis slider 7 is provided inside the Y-axis slide rail 4. In this state, the Y-axis slider 7 is fixedly connected to the fixed bracket 13, that is, the Z-axis slider 8 is connected to the fixed bracket 13 through the Y-axis slide rail 4 and the Y-axis slider 7. At the same time, the Y-axis slide rail 4 is provided with a second displacement detection mechanism for detecting the Y-axis displacement of the Y-axis slider 7. The purpose of the Y-axis slide rail 4, Y-axis slider 7, and second displacement detection mechanism is as follows: During the lifting and lowering process of the forklift mast under no-load or load conditions, a certain amount of forward or backward tilting is inevitable, or a direct mast tilting test may be performed. At this time, the movement trajectory of the fixed bracket 13, which is used to connect with the forklift mast's retaining rack, is no longer a simple lifting and lowering motion, but is actually an arc. The Y-axis slide rail 4, Y-axis slider 7, and second displacement detection mechanism not only meet the movement requirements of the fixed bracket 13, but also facilitate the measurement of the Y-axis displacement of the fixed bracket 13. This allows the host computer to obtain parameters such as the forward and backward deformation (deflection), forward and backward tilting angle, forward and backward tilting speed, and acceleration of the forklift mast during the lifting and lowering process based on the Y-axis displacement, Z-axis displacement, and function calculations, thereby improving the test accuracy of the forklift mast tilting test.

[0031] Based on the above embodiments, the forklift mast loading and unloading performance testing system provided by the present invention further includes an X-axis slide rail 3, an X-axis slider 6 disposed on the X-axis slide rail 3, and a third displacement detection mechanism, which is connected to the host computer via signal. Specifically, the Z-axis slide rail 5 is parallel to each other on the steel beam columns on both sides of the front end of the fixed column 2. Z-axis sliders 8 are correspondingly disposed within the Z-axis slide rail 5. A pair of Y-axis slide rails 4, each correspondingly fixed to one of the Z-axis sliders 8, are parallel to each other. The two ends of the X-axis slide rail 3 are fixedly connected to or integrally formed with a pair of Y-axis sliders 7. The Y-axis sliders 7 at both ends of the X-axis slide rail 3 are slidably connected within the Y-axis slide rail 4. The fixed bracket 13 is fixedly connected to the X-axis slider 6 slidably connected to the X-axis slide rail 3. The X-axis slide rail 3, X-axis slider 6, and third displacement detection mechanism, in conjunction with the first and second displacement detection mechanisms, can be used to detect whether the left and right deformation caused by the mast roller clearance is within the specified range when the forklift mast is eccentrically loaded (the load is biased to the left or right relative to the forklift mast).

[0032] In the above embodiments, the first, second, and third displacement detection mechanisms all employ magnetic scales. The magnetic scales read the displacement in the corresponding direction via data transmitters 12 fixed to the corresponding sliders and transmit this data to the host computer for processing and calculation. Specifically, the first displacement detection mechanism includes a Z-axis magnetic scale 11, with a Z-axis slider 8 connected to the corresponding data transmitter 12 for reading Z-axis displacement; the second displacement detection mechanism includes a Y-axis magnetic scale 10, with a Y-axis slider 7 connected to the corresponding data transmitter 12 for reading Y-axis displacement; and the third displacement detection mechanism includes an X-axis magnetic scale 9, with an X-axis slider 6 connected to the corresponding data transmitter 12 for reading X-axis displacement. All data transmitters 12 are signal-connected to the host computer. It should be noted that this signal connection includes, but is not limited to, signal cable connections and wireless connections such as Bluetooth.

[0033] The specific testing steps are as follows:

[0034] 1. Drive the forklift to be tested to the front of the forklift mast loading and unloading performance test device above the vibration isolation platform 1, and ensure that the test mast is under the testable steel beam column.

[0035] 2. Secure the test specimen to the test stand using the fixed bracket 13 and the X-axis slider 6, ensuring the test specimen is in the testing state (e.g., the gantry is in a vertical platform state).

[0036] 3. Through the upper computer position, clear the data of its X-axis magnetic scale 9, Y-axis magnetic scale 10, and Z-axis magnetic scale 11 to zero.

[0037] 4. Start the forklift and move the mast upwards. Record relevant data during the upward movement. Alternatively, tilt the mast forward and backward to test the mast's tilt angle, displacement, velocity, and acceleration data.

[0038] 5. The host computer outputs corresponding test parameters. During the actual calculation process, the host computer determines the start and end of each movement (the working principle of the magnetic scale is essentially magnetoelectric conversion; the host computer can determine the movement state and movement time of the corresponding slider based on the corresponding current signal), calculates the displacement, maximum speed, average speed, maximum tilt angle, and other indicators for each movement, and can further calculate the acceleration and other indicators for each movement. Finally, it outputs a dynamic graph of the movement, reproducing the detailed data and graphics of the entire movement, providing detailed data for the use of the forklift mast and further scientific research.

[0039] The host computer can be a computer; for example, it processes data through computer operations and outputs information such as data to a display. Figures 4 to 6The forklift mast motion information is shown. The host computer's processing can be described as follows (taking the Z-axis as an example): The host computer can directly read the number x of the N and S poles of the magnetic scale during the forklift mast's motion via data transmitter 12; record the time data t when the magnetic scale is at any N or S pole position during the forklift mast's motion; based on the distance d marked by any level of the built-in magnetic scale, obtain the current mast's motion speed v using the formula v = dx / t; obtain the current mast's height h using the formula h = dx; and obtain the current mast's acceleration a using the formula a = (x2d / t2 - x1d / t1) / (t2 - t1). In the above formulas, subscript 1 represents the initial state, and subscript 2 represents the final state or any intermediate state.

[0040] The forklift mast loading and unloading performance testing system provided in this invention can safely and conveniently test the performance of forklift masts. During testing, simply connect the fixed bracket 13 to the stop rack of the forklift mast to be tested. The system automatically detects the corresponding performance using a host computer, displacement detection mechanism, and data transmitter 12. When the forklift mast is unloaded or under load, lifting, tilting forward / backward, or laterally loaded, the fixed bracket moves with the stop rack. Simultaneously, the fixed bracket drives the Z-axis slider, Y-axis slider, and X-axis slider to move. Measurements are taken by the first, second, and third displacement detection mechanisms. The host computer can then acquire or calculate the motion information of the forklift mast, such as lifting displacement, speed, and acceleration; tilting displacement, speed, and acceleration; left / right and forward / backward deformation of the mast; and the descent distance (natural descent) after a preset suspension time under unloaded or loaded conditions. The system can also output dynamic motion graphics, reproducing the detailed data and graphics of the entire motion. No manual measurement is required, significantly improving detection accuracy, safety, and efficiency.

[0041] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0042] The forklift mast loading and unloading performance testing system provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A forklift mast loading and unloading performance testing system, characterized in that, The system includes a vertically mounted fixed column, a Z-axis slide rail located at the front end of the fixed column, a Z-axis slider that cooperates with the Z-axis slide rail, a fixed bracket that is connected to and moves synchronously with the Z-axis slider, the Z-axis slide rail being provided with a first displacement detection mechanism for measuring the Z-axis displacement of the Z-axis slider, and a host computer connected to the first displacement detection mechanism to obtain the Z-axis slider motion information based on the Z-axis displacement and movement time of the Z-axis slider, wherein the fixed bracket is detachably connected to the forklift mast's retaining rack. The Z-axis slider is fixedly connected to a horizontally arranged Y-axis slide rail. The Y-axis slide rail is equipped with a Y-axis slider and a second displacement detection mechanism for testing the Y-axis displacement of the Y-axis slider and connecting to the host computer. The fixed bracket is connected to the Z-axis slider through the Y-axis slider and the Y-axis slide rail. The Z-axis slide rail, the Z-axis slider, the Y-axis slide rail, and the Y-axis slider are all arranged in pairs. An X-axis slide rail is connected between a pair of Y-axis sliders. The X-axis slide rail is equipped with an X-axis slider and a third displacement detection mechanism for detecting the X-axis displacement of the X-axis slider and connecting to the host computer. The fixed bracket is fixedly connected to the X-axis slider. The first displacement detection mechanism, the second displacement detection mechanism, and the third displacement detection mechanism are all magnetic scales, and the magnetic scales and the host computer are connected by a data transmitter signal. The second displacement detection machine measures the Y-direction displacement of the fixed bracket, which is used to enable the host computer to obtain the front and rear deformation, front and rear tilt angle, front and rear tilt speed, and acceleration parameters of the forklift mast during the lifting process based on the Y-direction displacement, Z-direction displacement, and function calculation. The third displacement detection machine works in conjunction with the first and second displacement detection mechanisms to detect the left and right deformation caused by the eccentric loading of the forklift mast or the clearance between the mast rollers.

2. The forklift mast loading and unloading performance testing system according to claim 1, characterized in that, The fixed column includes a steel beam column and a crossbeam welded between adjacent steel beam columns.

3. The forklift mast loading and unloading performance testing system according to claim 2, characterized in that, The top of the fixed column is provided with a limiting device to limit the Z-axis slider.

4. The forklift mast loading and unloading performance testing system according to claim 1, characterized in that, It also includes a vibration isolation platform for parking the forklift to be tested, with the fixed column vertically welded to the vibration isolation platform.

5. The forklift mast loading and unloading performance testing system according to claim 4, characterized in that, It also includes annular vibration isolation trenches opened on the ground around the vibration isolation platform.

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