Automatic control system for strengthening test of electric pallet truck

Abstract

The utility model discloses an electric pallet truck reinforcement test automation control system, which relates to the technical field of industrial vehicle test and comprises a direction fixer fixed on a moving wheel of an electric pallet truck. An external controller and a complete machine controller, the external controller is connected to the complete machine controller through CAN communication, and the complete machine controller is electrically connected with a driving system of the electric pallet truck; and the wireless grating module comprises four groups of wireless gratings and grating signal receiving equipment, and the grating signal receiving equipment is electrically connected with an external controller. The testing efficiency can be remarkably improved, and the requirement of batch testing is met. The system circularly sends an instruction sequence through an external controller to control the electric pallet truck to carry out predetermined advancing, descending, lifting and retreating operations without manual intervention, so that the randomness of manual operation is eliminated, and the consistency of a test process and the comparability of a test result are improved.

Description

Technical Field

[0001] This utility model relates to the field of industrial vehicle testing technology, specifically to an automated control system for enhanced testing of electric pallet trucks. Background Technology

[0002] Intensive testing accelerates the wear and tear process of vehicle parts by simulating extreme working conditions (such as overload and high-frequency operation), thereby quickly identifying potential weaknesses in the design, such as insufficient structural strength, unreasonable matching of the transmission system, and failure of hydraulic component seals.

[0003] Currently, the reinforcement testing of electric pallet trucks mainly relies on manual operation, which has significant limitations: on the one hand, manual operation not only leads to low testing efficiency and makes it difficult to meet the needs of batch testing; on the other hand, the randomness of manual operation results in poor consistency of the testing process, reducing the comparability of test results between different batches and even within the same batch. Furthermore, traditional testing systems lack data acquisition mechanisms, making it impossible to monitor key parameters during the testing process, resulting in significant deviations between test results and actual working conditions, and making it difficult to quickly trace and analyze faults that occur during the test. These problems severely restrict the scientific rigor and accuracy of reinforcement testing of electric pallet trucks. Therefore, we propose an automated control system for reinforcement testing of electric pallet trucks. Utility Model Content

[0004] The purpose of this invention is to address the problem that the reinforcement testing of electric pallet trucks mainly relies on manual operation. Manual operation not only leads to low testing efficiency and difficulty in meeting the needs of batch testing, but also results in poor consistency of the testing process due to the randomness of manual operation, and reduces the comparability of test results between different batches or even within the same batch. This invention provides an automated control system for reinforcement testing of electric pallet trucks.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] An automated control system for enhanced testing of electric pallet trucks, including

[0007] A directional fixing device, which is fixed to the moving wheels of the electric pallet truck;

[0008] An external controller and a main controller are provided. The external controller is connected to the main controller via CAN communication. The main controller is electrically connected to the drive system of the electric pallet truck.

[0009] The wireless grating module includes four sets of wireless gratings and grating signal receiving devices. Each set of wireless gratings has two gratings, and the two gratings form the boundary of the test site. The four sets of wireless gratings enclose the pallet truck's operating area. The grating signal receiving devices are all installed on the electric pallet truck and are electrically connected to an external controller.

[0010] Furthermore, the direction fixer includes a fixer body, which is fixedly installed on the electric pallet truck by fastening bolts, and the outer end of the fixer body is bent downwards. A limiting protrusion is fixedly connected to the center of the bottom of the bent end of the fixer body, and a limiting notch is opened at the center of the upper end of the wheel frame of the electric pallet truck's moving wheel, and the limiting protrusion is inserted into the limiting notch.

[0011] Furthermore, the main body of the retainer and the limiting protrusion are integrally stamped and formed, and the main body of the retainer and the limiting protrusion are made of Q235 low carbon steel.

[0012] Furthermore, the external controller is equipped with an instruction sending unit, which cyclically sends instruction sequences with adjustable cycle time. The specific instructions include forward, downward, ascent, and backward operations.

[0013] Furthermore, the external controller is provided with a counting storage unit. The counting storage unit performs one count after the instruction sending unit finishes sending one instruction cycle, and stores the cumulative count N in the external controller.

[0014] Furthermore, the automated control system for the enhanced testing of electric pallet trucks also includes a grating audible and visual alarm device, which is installed in the testing personnel's work area and is wirelessly connected to an external controller.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model can significantly improve testing efficiency and meet the needs of batch testing. The system controls the electric pallet cart to perform predetermined forward, downward, lifting, and backward operations by sending a sequence of instructions in a loop through an external controller, without the need for manual intervention. This eliminates the randomness of manual operation and improves the consistency of the test process and the comparability of test results.

[0017] 2. This utility model also features data acquisition and monitoring capabilities, enabling real-time recording of key parameters during the test, such as running time and number of cycles, facilitating subsequent data analysis and fault tracing. When the electric pallet truck exceeds the predetermined area, the wireless grating module can quickly detect and trigger an alarm, ensuring the safety of the testing process. Attached Figure Description

[0018] Figure 1This is a site layout diagram for this utility model;

[0019] Figure 2 This is a layout diagram of the onboard equipment of this utility model;

[0020] Figure 3 This is the electrical schematic diagram of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the directional fixer of this utility model.

[0022] Reference numerals: A1, A2, Direction fixing device; C1: External controller; C2, Whole machine controller; G1, G2, G3, G4, Grating group; X1, Grating signal receiving device; S1, Grating sound and light alarm device; 11, Fixing device body; 12, Fastening bolt; 13, Limiting protrusion; 14, Limiting notch; Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] Please see Figures 1-4 This utility model provides an automated control system for the reinforcement testing of electric pallet trucks, including...

[0025] Directional fixing devices A1 and A2 are fixed to the moving wheels of the electric pallet truck.

[0026] An external controller C1 and a main controller C2 are provided. The external controller C1 is connected to the main controller C2 via CAN communication. The main controller C2 is electrically connected to the drive system of the electric pallet truck.

[0027] The wireless grating module includes four sets of wireless gratings G1, G2, G3, and G4, and a grating signal receiving device X1. Each set of wireless gratings G1, G2, G3, and G4 has two units, with the two wireless gratings facing each other to form the boundary of the test site. The four sets of wireless gratings G1, G2, G3, and G4 enclose the pallet truck's operating area. The grating signal receiving devices X1 are all installed on the electric pallet truck, and the grating signal receiving devices X1 are electrically connected to an external controller C1.

[0028] In this embodiment, preferably, the direction fixers A1 and A2 include a fixer body 11, which is fixedly installed on the electric pallet truck by fastening bolts 12. The outer end of the fixer body 11 is bent downwards, and a limiting protrusion 13 is fixedly connected to the bottom center of the bent end of the fixer body 11. A limiting notch 14 is opened at the center of the upper end of the wheel frame of the electric pallet truck's moving wheel, and the limiting protrusion 13 is inserted into the limiting notch.

[0029] In this embodiment, preferably, the retainer body 11 and the limiting protrusion 13 are integrally stamped and formed, and the retainer body 11 and the limiting protrusion 13 are made of Q235 low carbon steel.

[0030] In this embodiment, preferably, the external controller C1 is provided with an instruction sending unit, which cyclically sends instruction sequences with adjustable cycle time. The specific instructions include forward, downward, rising, and backward operations.

[0031] In this embodiment, preferably, the external controller C1 is provided with a counting storage unit. The counting storage unit performs one count after the instruction sending unit finishes sending one instruction cycle, and stores the cumulative count N in the external controller C1.

[0032] In this embodiment, preferably, the automated control system for the electric pallet truck reinforcement test further includes a grating audible and visual alarm device S1, which is installed in the test personnel's work area and is wirelessly connected to an external controller C1.

[0033] By installing direction fixers A1 and A2 onto the moving wheels of the electric pallet truck, the truck's travel direction is fixed to generally moving forward or backward in a straight line. Direction fixers A1 and A2 are simple and convenient to install, greatly saving space required for testing.

[0034] An external controller C1 is connected to an electric pallet truck controller C2, and a grating signal receiving device X1 is connected to the external controller C1. The external controller C1 is a programmable controller (PLC) that can send CAN data via programming. The forward, backward, lifting, and lowering movements of the electric pallet truck are also controlled by the handle sending corresponding CAN data to the controller C2. Upon receiving the CAN data, the controller C2 performs the corresponding actions. Different CAN signals correspond to different running directions and speeds. This invention programs the external controller C1 to send instructions to C2 cyclically, setting the time for each forward, backward, lifting, and lowering cycle. By storing and calculating the number of cycles and the time, the requirements for intensive testing are met. Specifically, in actual testing, the external controller C1 can be programmed to send a cyclic instruction sequence of forward t1 seconds - lowering t2 seconds - lifting t3 seconds - backward t4 seconds to the pallet truck controller C2. After each instruction cycle, a count is performed, and the accumulated count N is stored in the external controller C1. Then "2*N*single cycle time" is the duration of the enhanced test.

[0035] Even with a steering stabilizer installed, the vehicle may still gradually veer off course during operation due to ground conditions, mechanical errors, and other factors, preventing it from traveling entirely in a straight line. To improve the safety of the entire system and prevent damage to property caused by the automatically moving test vehicle veering off course, this invention incorporates a wireless light grating system to ensure the test vehicle operates within a fixed area. The area enclosed by four sets of wireless light gratings that transmit and receive infrared light forms the operating area for the electric pallet truck. After the wireless light gratings are powered on, if the emitted light is blocked by an object, the signal transmitting device on the grating set will send a boundary crossing signal (wireless signal) to the light grating signal receiving device X1 and the light grating audible and visual alarm device S1. Upon receiving the boundary crossing signal, the light grating signal receiving device X1 sends a signal to the external controller C1. Upon receiving the signal, the external controller C1 stops the program, and the test electric pallet truck stops moving. The pallet truck must be powered on again before it can continue operating. Upon receiving the boundary crossing signal, the light grating audible and visual alarm device S1 will issue an audible and visual alarm to remind the test personnel that the vehicle has veered off course and needs to be straightened before it can continue operating.

[0036] By adopting the automated control system for enhanced testing of electric pallet trucks according to this invention, testing efficiency can be significantly improved, meeting the needs of batch testing. The system controls the electric pallet truck to perform predetermined forward, downward, lifting, and backward operations by sending a sequence of commands cyclically through an external controller, without the need for manual intervention. This eliminates the randomness of manual operation and improves the consistency of the testing process and the comparability of test results.

[0037] Furthermore, this system also features data acquisition and monitoring capabilities, enabling real-time recording of key parameters during the testing process, such as running time and number of cycles, facilitating subsequent data analysis and fault tracing. When the electric pallet truck travels outside the predetermined area, the wireless light grating module can quickly detect this and trigger an alarm, ensuring the safety of the testing process. This not only improves testing efficiency and consistency but also enhances the safety and data traceability of the testing process, providing strong support for the performance evaluation and optimized design of the electric pallet truck.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automated control system for enhanced testing of electric pallet trucks, characterized in that, include Directional fixing devices (A1, A2) are fixed to the moving wheels of the electric pallet truck; An external controller (C1) and a main controller (C2) are provided. The external controller (C1) is connected to the main controller (C2) via CAN communication. The main controller (C2) is electrically connected to the drive system of the electric pallet truck. The wireless grating module includes four sets of wireless gratings (G1, G2, G3, G4) and a grating signal receiving device (X1). Each set of wireless gratings (G1, G2, G3, G4) has two units, and the two wireless gratings form the boundary of the test site. The four sets of wireless gratings (G1, G2, G3, G4) enclose the pallet truck's operating area. The grating signal receiving devices (X1) are all installed on the electric pallet truck and are electrically connected to an external controller (C1).

2. The automated control system for the enhanced testing of an electric pallet truck according to claim 1, characterized in that: The direction fixer (A1, A2) includes a fixer body (11), which is fixedly installed on the electric pallet truck by fastening bolts (12). The outer end of the fixer body (11) is bent downwards. A limiting protrusion (13) is fixedly connected to the bottom center of the bent end of the fixer body (11). A limiting notch (14) is opened at the center of the upper end of the wheel frame of the electric pallet truck. The limiting protrusion (13) is inserted into the limiting notch.

3. The automated control system for the enhanced testing of an electric pallet truck according to claim 2, characterized in that: The fixture body (11) and the limiting protrusion (13) are integrally stamped and formed, and the fixture body (11) and the limiting protrusion (13) are made of Q235 low carbon steel.

4. The automated control system for the enhanced testing of an electric pallet truck according to claim 1, characterized in that: The external controller (C1) is equipped with an instruction sending unit, which cyclically sends instruction sequences with adjustable cycle time. The specific instructions include forward, descent, ascent, and backward operations.

5. The automated control system for the enhanced testing of an electric pallet truck according to claim 4, characterized in that: The external controller (C1) is equipped with a counting storage unit. The counting storage unit performs one count after the instruction sending unit finishes sending one instruction cycle, and stores the cumulative count N in the external controller (C1).

6. The automated control system for the enhanced testing of an electric pallet truck according to claim 1, characterized in that: It also includes a grating sound and light alarm device (S1), which is installed in the test personnel's work area and is wirelessly connected to an external controller (C1).

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