A drop impact test bench

Abstract

The present invention discloses a drop-type impact test bench, comprising a frame, an impact platform, a drop platform, a release mechanism and a lifting mechanism. The bottom end of the frame is fixedly mounted on a base, the impact platform is located at the center of the base, the drop platform corresponds to the impact platform up and down, and both ends of the drop platform are located in the first guide rail (i.e., the drop platform guide rail) on the frame, and the component to be tested is fixed on the drop platform; the end of the lifting mechanism is connected with a release mechanism, and in the initial state, the release mechanism is used to fix and connect the drop platform; during the impact process, the release mechanism is used to release the drop platform; and the control center is used to control the working states of the lifting mechanism and the release mechanism. The drop-type impact test bench is specially designed for forklift electrical components, and can accurately obtain dynamic mechanical parameters such as impact acceleration and strain from the test, thereby clearly reflecting the impact resistance of the forklift electrical components and assessing the reliability of its functions and the integrity of its structure.

Description

Technical Field

[0001] The invention relates to the technical field of drop-type mechanical impact equipment, in particular to a drop-type impact test bench. Background Art

[0002] At present, common impact test benches are aimed at products with larger structural dimensions and heavier mass. For products with small structure and light weight such as forklift electrical components, general test benches cannot effectively detect their impact mechanical properties.

[0003] With the vigorous development of the logistics industry, forklifts are used more and more widely. It is inevitable that the electrical components of forklifts are subjected to impact and vibration during use. Its impact resistance is also an important indicator of the reliability of the forklift as a whole. It also becomes an important factor to be considered in the design process. Therefore, it is necessary to design a device that can be used to detect the impact resistance of the electrical components of the forklift. Summary of the invention

[0004] The purpose of the present invention is to provide a drop-type impact test bench to solve the problems existing in the above-mentioned prior art. It is a test equipment specially used to provide mechanical impact testing for forklift electrical components. It is simple to operate and is used to simulate the impact effects that forklift electrical components may be subjected to during transportation or use, analyze their ability to withstand external impact environments, and can accurately reflect their impact mechanical properties.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a drop-type impact test bench, comprising a frame, an impact platform, a drop platform, a release mechanism and a lifting mechanism, wherein the bottom end of the frame is fixedly mounted on a base, the impact platform is located at the center of the base, the drop platform corresponds to the impact platform up and down, and both ends of the drop platform are located in a first guide rail on the frame, and a component to be tested is fixed on the drop platform; the end of the lifting mechanism is connected to the release mechanism, and in an initial state, the release mechanism is used to fix and connect the drop platform; during the impact process, the release mechanism is used to release the drop platform; a control center is used to control the working states of the lifting mechanism and the release mechanism.

[0006] Preferably, the base is made of steel plate, and the mass of the base accounts for eighty-five percent of the mass of the entire test bench.

[0007] Preferably, the impact platform is rigidly connected and fixed to the base.

[0008] Preferably, the drop platform is provided with threaded holes for fixing the component to be detected.

[0009] Preferably, the release mechanism is an electromagnetic releaser.

[0010] Preferably, the lifting mechanism includes a motor, a bobbin, a traction rope and a fixed pulley group. The motor is transmission-connected to the input end of the bobbin through a belt. One end of the traction rope is wound around the bobbin, and the other end passes through the fixed pulley group installed on the top of the frame and is connected to the release mechanism.

[0011] Preferably, it also includes a tray mechanism, which includes a tray and a photosensor, the tray is installed on the frame through a fixed axis, and both ends of the fixed axis are located in second guide rails on both sides of the frame and can move up and down along the second guide rails; the tray can rotate around the fixed axis, the photosensor is used to detect whether there are parts passing, and the photosensor is linked to the control center signal.

[0012] Preferably, the second guide rail is located outside the first guide rail, and in the vertical direction, the second guide rail is located outside the edge of the drop platform.

[0013] Preferably, a ruler is provided on the frame.

[0014] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0015] The drop impact test bench in the present invention is specially designed for forklift electrical components and can accurately obtain dynamic mechanical parameters such as impact acceleration and strain from the test, thereby clearly reflecting the impact resistance of the forklift electrical components and assessing the reliability of its functions and the integrity of its structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the test bench impact;

[0018] Figure 2 It is a basic structural diagram of the drop impact test bench;

[0019] Figure 3 The structure of the rack;

[0020] Among them, 1. drop platform guide rail; 2. impact platform; 3. base; 4. electromagnetic releaser; 5. tray guide rail; 6. lifting mechanism; 7. remote control device; 8. ruler; 9. photosensitive sensor; 10. tray; 11. drop platform. DETAILED DESCRIPTION

[0021] 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.

[0022] The purpose of the present invention is to provide a drop-type impact test bench to solve the problems existing in the above-mentioned prior art. It is a test equipment specially used to provide mechanical impact testing for forklift electrical components. It is simple to operate and is used to simulate the impact effects that forklift electrical components may be subjected to during transportation or use, analyze their ability to withstand external impact environments, and can accurately reflect their impact mechanical properties.

[0023] The drop-type impact test bench of the present invention comprises a frame, an impact platform, a drop platform, a release mechanism and a lifting mechanism. The bottom end of the frame is fixedly mounted on a base, the impact platform is located at the center of the base, the drop platform corresponds to the impact platform up and down, and both ends of the drop platform are located in a first guide rail (i.e., the drop platform guide rail) on the frame, and a component to be tested is fixed on the drop platform; a release mechanism is connected to the end of the lifting mechanism, and in an initial state, the release mechanism is used to fix and connect the drop platform; during the impact process, the release mechanism is used to release the drop platform; a control center is used to control the working states of the lifting mechanism and the release mechanism.

[0024] After fixing the forklift electrical components on the drop platform, raise them to the specified height, and then the release mechanism releases the drop platform freely. The test piece then falls freely along the guide rail and collides with the impact platform at the bottom. The test piece is subjected to an instantaneous impact force and generates an upward impact acceleration, and the impact is completed.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-3 As shown, this embodiment provides a drop-type impact test bench, including a frame, an impact platform 2, a drop platform 11, a release mechanism and a lifting mechanism 6, the bottom end of the frame is fixedly mounted on the base 3, the impact platform 2 is located at the center of the base 3, the drop platform 11 corresponds to the impact platform 2 up and down, and both ends of the drop platform 11 are located in the first guide rail (i.e., the drop platform guide rail 1) on the frame, and the component to be tested is fixed on the drop platform 11; the end of the lifting mechanism 6 is connected to the release mechanism, and in the initial state, the release mechanism is used to fix and connect the drop platform 11; during the impact process, the release mechanism is used to release the drop platform 11; the control center is used to control the working state of the lifting mechanism 6 and the release mechanism.

[0027] In order to ensure the stability of the entire test bench, the base 3 in this embodiment is made of steel plate, which has a good isolation effect on external vibrations, and the mass of the base 3 accounts for 85% of the mass of the entire test bench, thereby ensuring the stability of the entire test bench.

[0028] In this embodiment, the impact platform 2 is rigidly connected and fixed to the base 3. The drop platform 11 is provided with threaded holes for fixing the components to be tested, and various forklift electrical components are fixed to the drop platform 11 through the threaded holes and bolts.

[0029] Furthermore, the release mechanism in this embodiment is an electromagnetic releaser 4. After a release signal is given, the electromagnetic releaser 4 is powered off, and then the specimen falls freely.

[0030] In order to avoid test errors caused by secondary impacts, the drop-type impact test bench of this embodiment also includes a tray 10 mechanism, which includes a tray 10 and a photosensitive sensor 9. The tray 10 is installed on the frame through a fixed axis, and the two ends of the fixed axis are located in the second guide rails (i.e., the tray guide rails 5) on both sides of the frame and can move up and down along the second guide rails; the tray 10 can rotate around the fixed axis, and the photosensitive sensor 9 is used to detect whether there are parts passing, and the photosensitive sensor 9 is linked to the control center signal. The second guide rail is located on the outside of the first guide rail, and in the vertical direction, the second guide rail is located on the outside of the edge of the drop platform 11, which will not affect the free fall of the drop platform 11 (the guide rail can be made of HT200 or HT300 steel, which has the advantages of good wear resistance, low friction coefficient and small internal stress deformation during use).

[0031] After a release signal is given, the electromagnetic releaser 4 is powered off, and the specimen falls freely. At the same time, under this release signal, the tray 10 will be folded upward (without affecting the normal free fall of the drop platform 11), thereby realizing the free fall of the specimen; a photosensor 9 is installed under the tray 10 to control the opening and folding of the tray 10; when the specimen passes the photosensor 9 for the first time, the tray 10 is in an upward folded state, and when the specimen bounces to a certain height after impact, the specimen passes the photosensor 9 for the second time. At this time, the photosensor 9 feeds back the sensing information to the control center, and the control center electrically drives the tray 10 to rotate relative to the fixed axis, so that the tray 10 is in a horizontal state to support the specimen.

[0032] In this embodiment, the lifting mechanism 6 includes a motor, a bobbin, a traction rope and a fixed pulley block. The motor is connected to the input end of the bobbin through a belt. One end of the traction rope is wound around the bobbin, and the other end is connected to the release mechanism after passing through the fixed pulley block installed on the top of the frame. The drop-type impact test bench is also provided with a remote control device 7, which can control the motor to drive the bobbin to rotate, thereby realizing the operation of collecting and releasing the rope, so that the lifting mechanism 6 drives the electromagnetic releaser 4 to rise and fall. After the free fall of the drop platform 11 is realized, the lifting mechanism 6 drives the electromagnetic releaser 4 to descend, and the electromagnetic releaser 4 is energized to attract the drop platform 11, and then the lifting mechanism 6 drives the electromagnetic releaser 4 and then drives the drop platform 11 to rise to the initial height.

[0033] In order to facilitate the setting and adjustment of the height of the drop platform 11 and the tray 10 mechanism, a ruler 8 is provided on the frame in this embodiment, and the height of the drop platform 11 and the tray 10 mechanism can be aligned according to the corresponding height value on the ruler 8.

[0034] The working principle of the drop impact test bench in the present invention is as follows:

[0035] During the test, the forklift electrical components are fixed flat on the drop platform 11. After power is turned on, the electromagnetic releaser 4 absorbs the drop platform 11 and makes it stationary at the specified height. At the same time, the pallet 10 is adjusted to a suitable height (the two ends of the fixed axis are fixed to the frame through the fixing parts), and the initial state of the pallet 10 is upwardly retracted. After the electromagnetic releaser 4 is turned off, the drop platform 11 falls freely along the guide rail and then hits the impact platform 2. After the impact is completed, when the drop platform 11 rebounds to the height of the pallet 10, the sensor senses for the second time, and the pallet 10 changes from the retracted state to the open state, thereby catching the drop platform 11 to prevent it from hitting the impact table surface again after rebounding and causing measurement errors. When the drop platform 11 is stable on the pallet 10, the remote control device 7 is used to lower the lifting mechanism 6 to the position of the pallet 10, and the electromagnetic releaser 4 is powered on to absorb the drop platform 11, so that the lifting mechanism 6 drives the electromagnetic releaser 4 and the drop platform 11 to rise to the initial height. At this point, an impact test is completed.

[0036] The technical indicators that this drop impact test bench can achieve are:

[0037] Maximum impact height: 1.5m

[0038] Maximum test sample size: 180mm×180mm.

[0039] In order to accurately reflect the mechanical characteristics of the impact of forklift electrical components, it is first necessary to be able to simulate the actual falling scene, that is, to be able to realize the free fall of forklift electrical components at a specified height in any posture, and secondly to reduce the test error as much as possible. Therefore, the drop impact test bench of the present invention is designed with double-column guidance, which can realize the falling of edges, faces and corners, and the falling height can be freely selected. The drop release adopts electromagnetic control, which can make the test object fall freely instantly, and perform drop impact tests on its edges, corners and faces; at the same time, a tray 10 is provided, which can make the test object be caught after the first impact rebound, avoiding test errors caused by secondary impact.

[0040] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0041] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A drop impact test bench, characterized in that: It includes a frame, an impact platform, a drop platform, a release mechanism and a lifting mechanism, the bottom end of the frame is fixedly mounted on a base, the impact platform is located at the center of the base, the drop platform corresponds to the impact platform up and down, and the two ends of the drop platform are located in the first guide rail on the frame, and the component to be detected is fixed on the drop platform; the end of the lifting mechanism is connected to the release mechanism, in the initial state, the release mechanism is used to fix and connect the drop platform; during the impact process, the release mechanism is used to release the drop platform; the control center is used to control the working state of the lifting mechanism and the release mechanism; It also includes a tray mechanism, which includes a tray and a photosensitive sensor. The tray is installed on the frame through a fixed shaft, and both ends of the fixed shaft are located in second guide rails on both sides of the frame and can move up and down along the second guide rails; the tray can rotate around the fixed shaft, and the photosensitive sensor is used to detect whether a component passes, and the photosensitive sensor is linked to a control center signal; After a release signal is given, the electromagnetic releaser is powered off, and the part to be detected falls freely. At the same time, under the release signal, the tray will be folded upward; the photosensitive sensor is installed under the tray; when the part to be detected passes the photosensitive sensor for the first time, the tray is in an upward folded state, and when the part to be detected bounces after impact, the part to be detected passes the photosensitive sensor for the second time. At this time, the photosensitive sensor feeds back sensing information to the control center, and the control center electrically drives the tray to rotate relative to the fixed axis, so that the tray is in a horizontal state to support the part to be detected.

2. The drop impact test bench according to claim 1, characterized in that: The base is made of steel plate, and the mass of the base accounts for eighty-five percent of the mass of the entire test bench.

3. The drop impact test bench according to claim 1, characterized in that: The impact platform is rigidly connected and fixed to the base.

4. The drop impact test bench according to claim 1, characterized in that: The drop platform is provided with threaded holes for fixing the components to be detected.

5. The drop impact test bench according to claim 1, characterized in that: The release mechanism is an electromagnetic releaser.

6. The drop impact test bench according to claim 1, characterized in that: The lifting mechanism includes a motor, a bobbin, a traction rope and a fixed pulley block. The motor is connected to the input end of the bobbin through a belt. One end of the traction rope is wound around the bobbin, and the other end passes through the fixed pulley block installed on the top of the frame and is connected to the release mechanism.

7. The drop impact test bench according to claim 1, characterized in that: The second guide rail is located outside the first guide rail, and in the vertical direction, the second guide rail is located outside the edge of the drop platform.

8. The drop impact test bench according to claim 1, characterized in that: A ruler is arranged on the frame.

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