An electric fork truck load testing device

Abstract

The present application relates to the technical field of new energy vehicle production and processing test, and discloses a load testing device for electric fork truck, which can restore the actual stress state of the fork, improve the test accuracy, realize automatic transfer and continuous test of the fork, and adapt to efficient industrial test requirements. The device comprises a frame structure composed of a bottom plate, a first vertical plate, a second vertical plate and a top plate. The first vertical plate is provided with a positioning hole, and a plurality of rotating rollers are arranged in the hole to form a low-friction rolling surface. A support assembly is arranged on the bottom plate corresponding to the extension direction of the positioning hole, and the support surface is flush with the rolling surface. The second vertical plate is connected with a feedback assembly through a driving assembly, and can realize positioning, unlocking and pushing out of the front end of the fork. A fixing assembly is arranged on the top plate corresponding to the upper side of the support assembly, and can clamp the tail end of the fork in cooperation with the support assembly. The top plate is also provided with a downward pressing test assembly, which can press the preset part of the fork. During the test, the feedback assembly moves downward to avoid interference, and the downward pressing reaches the front end of the fork and the feedback assembly. The system records the load value.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle production, processing and testing technology, and more specifically, to an electric forklift load testing device. Background Technology

[0002] With the automation upgrades in logistics warehousing, manufacturing, and other fields, electric forklifts, due to their advantages such as environmental friendliness, low noise, and high energy efficiency, have gradually replaced traditional internal combustion forklifts, becoming the core equipment for cargo handling and stacking operations. In the production and testing of electric forklifts, the forks, as the core component directly bearing heavy loads, have a load-bearing capacity that directly affects the safety and reliability of the electric forklift's operation. Therefore, accurate load testing of the forks is a crucial process for ensuring product quality.

[0003] Currently, existing load testing devices for electric forklifts in the industry generally employ relatively simple testing structures and methods. Specifically, the fork to be tested is placed directly on a platform, fixed at both ends by a fixing mechanism, and then pressure is applied to the middle area of ​​the fork through a pressure-applying mechanism. This simulates the load-bearing state of the fork in actual operation and tests its load limit and resistance to deformation. However, this traditional testing device and method has many obvious drawbacks and cannot meet the requirements for high-precision and high-efficiency testing. In actual use, the fork is fixed at one end and suspended at the other. Traditional testing devices, by fixing both ends of the fork and applying test force from the middle, restrict the normal deformation trend of the fork during the stress process. This results in stress not being within the preset test area, making the obtained load value unable to reflect the actual load-bearing capacity of the fork. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art, and thus to propose an electric forklift load testing device.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An electric forklift load testing device includes a base plate. A top plate is supported above the base plate by two symmetrically arranged vertical plates (first and second). The first vertical plate has positioning holes for inserting electric forklift forks. Multiple freely rotatable rollers are installed parallel to each other inside the positioning holes, with their top surfaces flush and forming a rolling surface adapted to the bottom surface of the forks. A support assembly is installed on the base plate corresponding to the extension direction of the positioning holes, with the support surface of the support assembly and the rolling surface at the same horizontal plane. A feedback assembly is connected to the second vertical plate via a drive assembly. The feedback component can be moved horizontally to a preset receiving position to receive and fix the front end of the fork, or moved back to a preset unloading position. A fixing component is installed on the top plate directly above the support component. When the feedback component moves back to the unloading position, the fixing component cooperates with the support component to fix the tail end of the fork. Then the feedback component moves down away from the front end of the fork to create clearance space. A downward pressure test component that cooperates with the feedback component is also installed on the top plate. When the front end of the fork contacts the feedback component, the load value borne by the fork at this time is recorded to complete a single load test.

[0007] Furthermore, in the above solution, the feedback component, the fixing component, and the pressure test component are all reset after a single load test, and the drive component once again drives the feedback component to move to the receiving position to push out the forks.

[0008] Furthermore, the above solution includes a support base with a groove on its upper surface. A first electromagnetic plate is installed in the groove. The first electromagnetic plate is energized after the feedback component moves back to the feeding position to fix the tail end of the fork. A support roller is also installed in the groove. The support roller is located on one side of the pressure test component, and its surface is flush with the upper surface of the first electromagnetic plate to form a support surface for supporting the fork.

[0009] Furthermore, the above solution includes two insert plates that are movably inserted into both sides of the support base. The insert plates are fixed in position by positioning bolts connected to the top surface of the support base via vertical threads. The inner end of the insert plate extends into the groove and is rotatably connected to multiple auxiliary rollers along the upper and lower sides of the insert plate. A rolling limiting channel is formed between the left and right sets of auxiliary rollers and is located above the support surface.

[0010] Furthermore, the above solution includes two sets of fixed seats symmetrically arranged on the bottom plate and the top plate, respectively. Each set of fixed seats includes two symmetrically arranged fixed seats, and a slide rail and a lead screw are installed between the two fixed seats. A movable plate for installing a feedback component is fitted on the upper and lower slide rails and the lead screw. A first gear is installed at one end of the lead screw, and the first gear meshes with a second gear. The second gear is connected to a rotating shaft, and both rotating shafts are connected to a dual-shaft reducer set on the second vertical plate.

[0011] Furthermore, the above solution includes a mounting bracket on a movable plate, on which a first telescopic cylinder is vertically mounted. A first pressure sensor is mounted on the first telescopic cylinder via a stabilizing base. A second electromagnetic plate is mounted on the first pressure sensor. The second electromagnetic plate is energized at the receiving position and de-energized at the discharging position. The mounting bracket is also connected to a limit seat via multiple sets of mounted horizontal springs, and the outer surface of the limit seat is arc-shaped.

[0012] Furthermore, the above-mentioned solution includes a second telescopic cylinder vertically mounted on the top plate. The second telescopic cylinder is equipped with a second pressure sensor via a support. A stop is mounted on the bottom of the second pressure sensor, and the bottom surface of the stop is flat.

[0013] Furthermore, the above solution includes a third telescopic cylinder vertically mounted on the top plate. The third telescopic cylinder is connected to a housing. A third pressure sensor and vertical springs are installed around the third pressure sensor on the top surface inside the housing. The bottom ends of the vertical springs are connected to a slide block. The slide block is vertically slidably mounted inside the housing, and a slide rod is installed at its bottom. The bottom end of the slide rod passes through the housing and extends to the bottom of the housing, where it is connected to a pressure seat for applying pressure to the forks. The bottom surface of the pressure seat is curved.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention simulates the state of a fork in actual operation, where one end is fixed and the other end is suspended. A fixing component and a support component work together to clamp the fork tail end, corresponding to the fixed end of the fork and forklift body in actual operation. During the testing phase, the fork front end is not subject to forced constraint; the feedback component only acts during the positioning and resetting phases. Furthermore, during the downward pressure test, the feedback component moves downward to create clearance space, completely avoiding interference with fork deformation. When the downward pressure test component applies pressure until the fork front end contacts the clearance-state feedback component, the recorded load value accurately matches the actual load-bearing conditions of the fork, effectively solving the stress offset problem of traditional tests and significantly improving the authenticity and reliability of the test data. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram showing the installation position of the rotating roller;

[0018] Figure 3 A schematic diagram of the supporting components;

[0019] Figure 4 This is a schematic diagram showing the installation position of the auxiliary roller;

[0020] Figure 5 This is a schematic diagram of the drive component.

[0021] Figure 6 This is a structural diagram of the fixed component;

[0022] Figure 7 This is a schematic diagram of the structure of the pressure test component;

[0023] The components include: 1. Base plate; 11. First vertical plate; 111. Positioning hole; 12. Second vertical plate; 13. Top plate; 14. Rotating roller; 2. Support assembly; 21. Support base; 211. Groove; 22. First electromagnetic plate; 23. Support roller; 24. Insert plate; 25. Positioning bolt; 26. Auxiliary roller; 3. Drive assembly; 31. Fixed base; 32. Slide rail; 33. Lead screw; 34. Moving plate; 35. First gear; 36. Second gear; 37. Rotating shaft; 38. Dual-shaft reducer. 4. Feedback component; 41. Mounting bracket; 42. First telescopic cylinder; 43. Stabilizing seat; 44. First pressure sensor; 45. Second electromagnetic plate; 46. Horizontal spring; 47. Limiting seat; 5. Fixing component; 51. Second telescopic cylinder; 52. Support; 53. Second pressure sensor; 54. Abutment; 6. Downward pressure test component; 61. Third telescopic cylinder; 62. Housing; 63. Third pressure sensor; 64. Vertical spring; 65. Slide; 66. Slide rod; 67. Pressure seat. 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 a part of the embodiments of the present invention, and not all of them. 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. The present invention will be further described with reference to the accompanying drawings and embodiments:

[0025] An electric forklift load testing device, as shown in the attached document. Figure 1 and attached Figure 2 As shown, the system includes a base plate 1. A top plate 13 is supported above the base plate 1 by a symmetrically arranged first vertical plate 11 and a second vertical plate 12, forming a stable frame structure that provides an installation and working reference for each functional component. Positioning holes 111 for inserting electric forklift forks are provided on the first vertical plate 11. Multiple freely rotatable rotating rollers 14 are installed parallel to each other inside the positioning holes 111. The top surfaces of the multiple rotating rollers 14 are flush and together form a rolling surface adapted to the bottom surface of the forks, thereby reducing frictional resistance when the forks are inserted or moved, ensuring that the forks can smoothly and steadily move in and out along the direction of the positioning holes 111.

[0026] Among them, a support component 2 is installed on the base plate 1 in the direction of extension of the positioning hole 111. The support surface of the support component 2 and the rolling surface are kept at the same horizontal plane with no height difference, so as to ensure that the forks can be placed stably on the support component 2 after they are removed from the rolling surface, and to avoid the forks shaking or shifting due to sudden height changes.

[0027] The second vertical plate 12 is connected to a feedback component 4 via a drive component 3. The drive component 3 and the feedback component 4 work together to position and unlock the fork tip. The drive component 3 can drive the feedback component 4 to move horizontally. When the feedback component 4 moves to the preset receiving position, it can receive the fork tip and fix it to prevent the fork from shifting in subsequent operations. When it is necessary to release the fixation, the drive component 3 drives the feedback component 4 back to the preset unloading position. At this time, the feedback component 4 disengages from the fork tip, releasing the constraint on the fork tip. At the same time, the load test position of the fork is determined.

[0028] Among them, a fixing component 5 is installed on the top plate 13 directly above the support component 2. When the feedback component 4 moves back to the material release position (releasing the fixing of the front end of the fork), the fixing component 5 is activated, forming a coordinated action with the support component 2 below to clamp and fix the tail end of the fork placed on the support component 2. After the tail end of the fork is completely fixed, the feedback component 4 moves down away from the front end of the fork to form a clearance space, so as to avoid interference between the feedback component 4 and the front end of the fork during subsequent load testing, which would affect the test accuracy.

[0029] In addition, a downward pressure test component 6 is installed on the top plate 13 so that the downward pressure test component 6 will contact the preset test part of the fork until the front end of the fork comes into contact with the feedback component 4 (which is in the avoidance position at this time and only serves as the force feedback reference). When the fork and the feedback component 4 are detected to form a stable contact state, the test system will automatically record the load value borne by the fork at this time and complete the single load test. Afterwards, the feedback component 4, the fixing component 5 and the downward pressure test component 6 are all reset after the single load test is completed. The drive component 3 drives the feedback component 4 to move to the receiving position again and pushes out the fork.

[0030] In its specific implementation, this invention is based on a stable frame consisting of a base plate 1, a first vertical plate 11, a second vertical plate 12, and a top plate 13. A rotating roller 14 inside the positioning hole 111 reduces friction to facilitate fork movement. A support component 2, flush with the rolling surface, ensures stable fork placement. A drive component 3 drives a feedback component 4 to position and unlock the fork tip. A fixing component 5, in conjunction with the support component 2, clamps the fork tail. A pressure test component 6 applies pressure to the feedback component 4, which is in a resistive state at the fork tip. The system records the load value to complete the test. Finally, all components reset, and the feedback component 4 pushes the fork ejection device. The rotating roller 14 and support component 2 are designed to ensure smooth fork movement. The feedback component 4 and fixing component 5 work together to achieve precise positioning and fixation, avoiding test interference and ensuring test accuracy. Furthermore, the fork is automatically ejected after the test, facilitating continuous operation. In use, the fork is inserted through the positioning hole 111 and placed on the support component 2. The feedback component 4 is moved to the receiving position to fix the front end of the fork. Then, the feedback component 4 is moved back to the discharging position. The fixing component 5 starts to clamp the tail end of the fork. The feedback component 4 moves down to avoid it. The pressure test component 6 starts to apply pressure until it comes into contact with the feedback component 4 after it has moved down to avoid it. The system records the load value borne by the fork at this time. After the test is completed, the drive component 3 drives the feedback component 4 to move back to the receiving position. Through the pushing action of the feedback component 4 on the front end of the fork, the fork that has completed the test is pushed out of the device along the support component 2 and the rolling surface so that the operator can take away the fork or put in a new fork to be tested and enter the next test cycle.

[0031] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 3 As shown, the support assembly 2 includes a support base 21. A groove 211 is provided on the upper surface of the support base 21. A first electromagnetic plate 22 is installed in the groove 211. The first electromagnetic plate 22 is energized after the feedback assembly 4 moves back to the feeding position to fix the tail end of the fork. A support roller 23 is also installed in the groove 211. The support roller 23 is located on one side of the pressure test assembly 6, and its surface is flush with the upper surface of the first electromagnetic plate 22 to form a support surface for supporting the fork.

[0032] In this design, the support base 21 serves as the basic load-bearing component. The groove 211 on its surface provides installation space for the first electromagnetic plate 22 and the support roller 23, while also providing lateral constraint on the fork tail. When the feedback component 4 moves back to the feeding position (i.e., after the fork front constraint is released and the test position is determined), the first electromagnetic plate 22 is energized to generate magnetism, using electromagnetic attraction to firmly fix the fork tail in the groove 211 area of ​​the support base 21, preventing the fork tail from shifting during subsequent pressing tests. When the pressing test component 6 applies a vertical load to the fork, the rolling contact of the support roller 23 can significantly reduce friction loss between the two, protecting the appearance and structural integrity of the fork under test, which is especially suitable for batch continuous testing scenarios.

[0033] In order to provide lateral guidance when the forks are inserted into the support assembly 2, and to prevent the forks from shifting and failing to be accurately placed in the center of the support surface, the following is provided: Figure 4 As shown, two insert plates 24 are movably inserted into both sides of the support base 21, and the insert plates 24 are fixed in position by positioning bolts 25 connected to the top surface of the support base 21 through vertical threads. The inner end of the insert plate 24 extends into the groove 211 and multiple auxiliary rollers 26 are rotatably connected along the upper and lower surfaces of the insert plate 24. A rolling limiting channel is formed between the left and right sets of auxiliary rollers 26 and is located above the support surface.

[0034] During the process, based on the width of the fork to be tested, the insertion depth of the insert plates 24 on both sides of the support base 21 is first adjusted. When the inner end of the insert plate 24 extends into the groove 211 and the distance between the left and right sets of insert plates 24 matches the width of the fork, the positioning bolts 25 connected to the top surface of the support base 21 via vertical threads are tightened to fix the position of the insert plates 24. Since multiple auxiliary rollers 26 are rotatably connected to the upper and lower surfaces of the insert plates 24, the auxiliary rollers 26 of the left and right sets of insert plates 24 together form a rolling limiting channel located above the support surface. When the fork is inserted through the positioning hole 111 and moves towards the support assembly 2, the two sides of the fork will contact the auxiliary rollers 26 in the rolling limiting channel. The auxiliary rollers 26 rotate with the movement of the fork, which not only provides lateral limiting for the fork to prevent it from shifting to the left or right, but also guides the fork to move accurately along the channel to the center of the support surface, ensuring accurate positioning during fork testing.

[0035] For the above scheme, please refer to the appendix for details. Figure 1 As shown, the drive assembly 3 includes two sets of fixed seats 31 symmetrically arranged on the base plate 1 and the top plate 13 respectively. Each set of fixed seats 31 includes two symmetrically arranged fixed seats 31, and a slide rail 32 and a lead screw 33 are installed between the two fixed seats 31. A movable plate 34 for installing the feedback assembly 4 is fitted on the upper and lower slide rails 32 and the lead screw 33. A first gear 35 is installed at one end of the lead screw 33. The first gear 35 meshes with a second gear 36. The second gear 36 is connected to a rotating shaft 37. Both rotating shafts 37 are connected to a dual-shaft reducer 38 arranged on the second vertical plate 12 so that the dual-shaft reducer 38 operates and drives the movable plate 34 to move horizontally.

[0036] In this design, when the feedback component 4 needs to be moved, the dual-shaft reducer 38 starts, and its two output ends synchronously drive the two rotating shafts 37 to rotate. The rotating shafts 37 drive the second gear 36 to rotate, and the second gear 36 drives the first gear 35 to rotate through meshing transmission, which in turn drives the lead screw 33 to rotate. Since the moving plate 34 and the lead screw 33 are threaded together and simultaneously slide together with the slide rail 32, the rotational motion of the lead screw 33 is converted into the horizontal linear motion of the moving plate 34 along the slide rail 32, which ultimately drives the feedback component 4 installed on the moving plate 34 to achieve precise translation (to the receiving position to fix the front end of the fork, or to the unloading position to release the constraint). In this process, the arrangement of the moving plate 34 forms a rigid connection with the upper and lower slide rails 32 and the lead screw 33, which is equivalent to adding a longitudinal support to the frame, enhancing the longitudinal stability of the frame and improving the service life of the device.

[0037] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 5 As shown, the feedback component 4 includes a mounting bracket 41 mounted on the movable plate 34. A first telescopic cylinder 42 is vertically mounted on the mounting bracket 41. The first telescopic cylinder 42 is mounted with a first pressure sensor 44 for receiving material from the front end of the fork after it has been bent under pressure via a stabilizing seat 43. The first pressure sensor 44 is equipped with a second electromagnetic plate 45 for adsorbing the front end of the fork. The second electromagnetic plate 45 is energized at the receiving position and de-energized at the discharging position. The mounting bracket 41 is also connected to a limiting seat 47 for limiting the contact of the front end of the fork via multiple sets of mounted horizontal springs 46. The outer surface of the limiting seat 47 is arc-shaped, so that the elastic limiting seat 47 will not obstruct the fork and affect the test accuracy during the bending process.

[0038] In this design, the first telescopic cylinder 42 can drive the first pressure sensor 44, which is mounted on the stabilizing seat 43, to move up and down. The second electromagnetic plate 45 can attract the front end of the fork to achieve positioning and fixation. During the downward pressure test, the first pressure sensor 44 receives the force generated by the bending of the front end of the fork and feeds it back to the testing system, so that the testing system records the current test value. It can accurately detect the force and ensure the accuracy of the test data. The mounting bracket 41 is connected to the limiting seat 47 by multiple sets of horizontal springs 46. It can limit the contact of the front end of the fork when loading the fork. During the test, due to the elasticity and arc design of the horizontal springs 46, it can avoid obstruction during the bending process of the fork downward pressure, ensuring that the front end of the fork is pressed down during the suspension test. It can both assist in limiting the position and not affect the bending of the fork, thus ensuring the test accuracy.

[0039] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 6As shown, the fixing component 5 includes a second telescopic cylinder 51 vertically mounted on the top plate 13. The second telescopic cylinder 51 is equipped with a second pressure sensor 53 via a support 51. A stop 54 is mounted on the bottom of the second pressure sensor 53. The bottom surface of the stop 54 is a plane.

[0040] In this design, the second telescopic cylinder 51 can drive the second pressure sensor 53 and the bottom abutment 54, which are mounted on the support 51, to move up and down. When the feedback component 4 moves back to the feeding position, the second telescopic cylinder 51 drives the abutment 54 to move down, so that the abutment 54 and the groove 211 of the support component 2 can be precisely matched and cooperate with the support component 2 to clamp the fork tail end. At the same time, the second pressure sensor 53 can detect the pressure during the clamping process, ensuring that the timing and force of clamping the fork tail end are controllable. The second pressure sensor 53 monitors the clamping pressure in real time to avoid over-clamping and damaging the fork. It can work with the support component 2 to stabilize the fork, providing a stable benchmark for subsequent downward pressure tests and improving test reliability.

[0041] For the above scheme, please refer to the appendix for details. Figure 1 and attached Figure 7 As shown, the pressure test assembly 6 includes a third telescopic cylinder 61 vertically mounted on the top plate 13. The third telescopic cylinder 61 is connected to a housing 62. A third pressure sensor 63 and vertical springs 64 are mounted around the third pressure sensor 63 on the top surface inside the housing 62. The bottom ends of the vertical springs 64 are connected to a slide block 65. The slide block 65 is vertically slidably mounted inside the housing 62 and has a slide rod 66 mounted at its bottom. The bottom end of the slide rod 66 passes through the housing 62 and extends to the bottom of the housing 62 and is connected to a pressure seat 67 for applying pressure to the forks. The bottom surface of the pressure seat 67 is an arc surface.

[0042] In the design, during testing, the third telescopic cylinder 61 drives the outer shell 62 downwards, and the pressure seat 67 first contacts the preset test position of the fork. As the third telescopic cylinder 61 continues to apply pressure, the pressure seat 67 is pushed upwards by the reaction force of the fork, and the slide rod 66 is pushed upwards by the slide 65. The slide 65 compresses the surrounding vertical springs 64. The elastic force generated by the deformation of the vertical springs 64 is gradually transmitted to the third pressure sensor 63 on the top surface inside the outer shell 62. The third sensor collects pressure data in real time. When the front end of the fork bends and touches the feedback component 4, the test system receives the signal from the third sensor and records the load value, completing the pressure test. After the test, the third telescopic cylinder 61 returns, the vertical springs 64 release elastic potential energy, and push the slide 65, slide rod 66 and pressure seat 67 downwards to reset, waiting for the next test. The overall structure takes into account both pressure stability and test accuracy, meeting the core requirements of fork load testing.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric forklift load testing device, comprising a base plate (1), wherein a top plate (13) is connected and supported above the base plate (1) by a first vertical plate (11) and a second vertical plate (12) arranged symmetrically, characterized in that: The first vertical plate (11) has a positioning hole (111) for inserting electric forklift forks. Multiple freely rotating rollers (14) are installed in parallel at intervals inside the positioning hole (111). The top surfaces of the multiple rotating rollers (14) are flush and together form a rolling surface that is adapted to the bottom surface of the fork. A support component (2) is installed on the base plate (1) in the direction of the extension of the positioning hole (111). The support surface of the support component (2) and the rolling surface are kept on the same horizontal plane. The second vertical plate (12) is connected to a feedback component (4) via a drive component (3), so that the feedback component (4) can move to a preset receiving position and receive and fix the front end of the fork, or move back to a preset discharging position; A fixing component (5) is installed on the top plate (13) directly above the support component (2). When the feedback component (4) moves back to the feeding position, the fixing component (5) cooperates with the support component (2) and fixes the tail end of the fork. Then the feedback component (4) moves down away from the front end of the fork to form a clearance space. The top plate (13) is also equipped with a pressure test component (6) that works in conjunction with the feedback component (4). When the front end of the fork comes into contact with the feedback component (4), the load value borne by the fork is recorded to complete a single load test. The support assembly (2) includes a support base (21), and a groove (211) is provided on the upper surface of the support base (21). A first electromagnetic plate (22) is installed in the groove (211). The first electromagnetic plate (22) is energized after the feedback assembly (4) moves back to the material feeding position to fix the tail end of the fork. A support roller (23) is also installed in the groove (211). The support roller (23) is located on one side of the pressure test assembly (6), and its surface is flush with the upper surface of the first electromagnetic plate (22) to form a support surface for supporting the placement of the fork. The drive assembly (3) includes two sets of fixed seats (31) symmetrically arranged on the bottom plate (1) and the top plate (13). Each set of fixed seats (31) includes two symmetrically arranged fixed seats (31), and a slide rail (32) and a lead screw (33) are installed between the two fixed seats (31). A movable plate (34) for installing the feedback assembly (4) is fitted on the upper and lower slide rails (32) and the lead screw (33). A first gear (35) is installed at one end of the lead screw (33), and the first gear (35) meshes with a second gear (36). The second gear (36) is connected to a rotating shaft (37). Both rotating shafts (37) are connected to a dual-shaft reducer (38) set on the second vertical plate (12). The feedback component (4) includes a mounting bracket (41) set on the movable plate (34). A first telescopic cylinder (42) is vertically mounted on the mounting bracket (41). A first pressure sensor (44) is mounted on the first telescopic cylinder (42) through a stabilizing seat (43). A second electromagnetic plate (45) is provided on the first pressure sensor (44). The second electromagnetic plate (45) is energized at the receiving position and de-energized at the discharging position. A limit seat (47) is also connected to the mounting bracket (41) through multiple sets of installed horizontal springs (46), and the outer surface of the limit seat (47) is an arc surface.

2. The electric forklift load testing device according to claim 1, characterized in that: The feedback component (4), the fixing component (5) and the pressure test component (6) are all reset after a single load test. The drive component (3) then drives the feedback component (4) to move to the receiving position and push out the forks.

3. The electric forklift load testing device according to claim 2, characterized in that: Two insert plates (24) are movably inserted on both sides of the support base (21), and the insert plates (24) are fixed in position by positioning bolts (25) connected to the top surface of the support base (21) by vertical threads. The inner end of the insert plate (24) extends into the groove (211) and multiple auxiliary rollers (26) are rotatably connected along the upper and lower surfaces of the insert plate (24). A rolling limiting channel is formed between the two sets of auxiliary rollers (26) and is located above the support surface.

4. The electric forklift load testing device according to claim 3, characterized in that: The fixing component (5) includes a second telescopic cylinder (51) vertically mounted on the top plate (13). The second telescopic cylinder (51) is equipped with a second pressure sensor (53) via a support (52). A stop (54) is mounted on the bottom of the second pressure sensor (53). The bottom surface of the stop (54) is a plane.

5. The electric forklift load testing device according to claim 4, characterized in that: The pressure test assembly (6) includes a third telescopic cylinder (61) vertically mounted on the top plate (13). The third telescopic cylinder (61) is connected to a housing (62). A third pressure sensor (63) and vertical springs (64) are installed on the top surface inside the housing (62). The bottom ends of the vertical springs (64) are connected to a slide block (65). The slide block (65) is vertically slidably mounted inside the housing (62) and a slide rod (66) is installed at its bottom. The bottom end of the slide rod (66) passes through the housing (62) and extends to the bottom of the housing (62) and is connected to a pressure seat (67) for applying pressure to the forks. The bottom surface of the pressure seat (67) is an arc surface.

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