Strength detection equipment for packaging box production

Abstract

The invention relates to the technical field of packaging box production, in particular to strength detection equipment for packaging box production, which comprises a base and guide columns symmetrically and fixedly connected to two sides of the base, an electric lifting plate is mounted between the guide columns, a hydraulic cylinder is mounted on the electric lifting plate, and a pressing plate is fixedly connected to the end part of a telescopic rod of the hydraulic cylinder; the device is used for pressing the packaging box from top to bottom to complete strength detection. A belt assembly rotates forwards to drive a packaging box to move rightwards to the position under a pressing plate, then a hydraulic cylinder is started to drive the pressing plate to move downwards to make contact with the packaging box, the pressing plate exerts pressure on the top of the packaging box, strength detection from top to bottom is completed, meanwhile, a stepping motor is started, a side plate I and a side plate II exert pressure on the side edges of the packaging box, and strength detection is completed. In this way, the strength of the top and the side edges of the packaging box can be continuously detected, detection is more comprehensive, and therefore the strength detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging box production, and in particular to a strength detection device for packaging box production. Background Art

[0002] The production process of packaging boxes requires multiple steps to complete the production, and the purpose of packaging boxes is to hold items. In order to ensure the quality of packaging boxes, the strength of the packaging boxes needs to be tested.

[0003] A Chinese patent with announcement number CN220473249U discloses a strength testing device for packaging box production, which relates to the technical field of packaging box production, and includes a fixed frame, a box to be tested is placed at the bottom of the fixed frame, and sliding rods are fixedly provided on both sides of the interior of the fixed frame, and the rod walls of the two sliding rods are slidably provided with a plurality of stacked weight plates, and the weight plates are located on the top of the box to be tested; two fixed plates are symmetrically fixed on the top of the fixed frame, and the side walls of the two fixed plates are plugged with a plurality of evenly distributed pins, and both sides of the plurality of weight plates are provided with sockets that match the pins. Although the above patent can perform strength testing on the packaging box, it can only perform pressure on the top of the packaging box to complete the strength test. Since the packaging box will be subjected to pressure from the side, it is impossible to perform pressure on the side of the packaging box to complete the side strength test, and the test is not comprehensive, which affects the accuracy of the strength test.

[0004] The present invention aims to solve the problems existing in the above-mentioned patents. To this end, a strength testing device for packaging box production is proposed, which can simultaneously apply pressure to the top and sides of the packaging box to complete strength testing, comprehensively test, and improve the accuracy of strength testing. Summary of the invention

[0005] In order to overcome the shortcomings of the above patent that although it can perform strength testing on the packaging box, it can only apply pressure to the top of the packaging box to complete the strength test, and since the packaging box will be subjected to pressure from the sides, it is impossible to apply pressure to the sides of the packaging box to complete the side strength test, resulting in incomplete testing and affecting the accuracy of the strength test, the present invention provides a strength testing device for packaging box production that can simultaneously apply pressure to the top and sides of the packaging box to complete the strength test, which is comprehensive and improves the accuracy of the strength test.

[0006] The present invention is achieved through the following technical solutions:

[0007] A strength testing device for packaging box production, comprising a base and guide columns symmetrically fixed to both sides of the base, an electric lifting plate installed between the guide columns, a hydraulic cylinder installed on the electric lifting plate, a pressing plate fixed to the end of the telescopic rod of the hydraulic cylinder, used to press the packaging box from top to bottom to complete the strength test, and also comprising a conveying assembly, a bidirectional screw, a side plate I, a side plate II, a stepping motor and a supporting assembly, the conveying assembly is installed on the base, used to convey the packaging box to the bottom of the pressing plate, the pressing plate is symmetrically rotatably connected with a bidirectional screw, the threads on the front and rear sides of the bidirectional screw are opposite, and the front and rear sides of the bottom of the pressing plate are symmetrically slidably connected There is a side plate I, which is threadedly connected to the bidirectional screw, and a side plate II is fixedly connected to the bottom of the side plate I. There are protrusions on the side plate II at even intervals. A stepper motor is installed on the top of the pressure plate, and the output shaft of the stepper motor and the bidirectional screw are transmitted through a synchronous belt assembly. When the stepper motor is started, the stepper motor drives the bidirectional screw to rotate through the synchronous belt assembly, and the bidirectional screw drives the side plate I and the side plate II to move and contact with the packaging box, so that the side plate I and the side plate II apply pressure to the side of the packaging box to complete the strength test of the side. The support assembly is installed between the pressure plate and the base, and is used to drive the packaging box to move upward and disengage from the conveying assembly.

[0008] To further explain, the conveying assembly includes a rotating shaft symmetrically connected to the base, a belt assembly is evenly spaced between the rotating shafts, the top of the belt assembly is higher than the top of the base, a driving motor is installed on the base, and the output shaft end of the driving motor is fixedly connected to one of the rotating shaft ends.

[0009] To further explain, the support assembly includes a guide rod fixedly connected to the base, a movable frame slidably mounted on the guide rod and slidably connected to the base, a support plate fixedly connected to the top of the movable frame, used to drive the packaging box to move upward and disengage from the belt assembly, the support plate is located between adjacent belt assemblies, and a trigger assembly is arranged between the movable frame and the pressure plate, used to drive the movable frame to move.

[0010] To further explain, the trigger assembly includes a rack II fixed to the outer side of the movable frame, a spur gear rotatably connected to the base and meshing with the rack II, an elastic telescopic rod fixed to the bottom of the pressure plate, and a rack I meshing with the spur gear fixed to the elastic telescopic rod.

[0011] Further explanation, the strength testing equipment for packaging box production also includes a friction assembly, which includes a fixed plate fixedly connected between the side plates Ⅰ on both sides of the front, a disc rotatably connected to the fixed plate, and friction rods evenly spaced and fixed on the disc for performing friction tests on the packaging box, and a rotating assembly is arranged between the disc and the stepper motor for driving the disc to rotate.

[0012] Further explanation, the rotating assembly includes a vertical plate fixed to the bottom of the pressure plate, a spline sleeve is rotatably connected to the vertical plate, the spline sleeve and the output shaft of the stepper motor are transmitted through a synchronous belt assembly, a spline shaft is slidably connected to the inner side of the spline sleeve, and the end of the spline shaft is fixedly connected to the middle of the disc.

[0013] Further explanation, the strength testing equipment for packaging box production also includes a rotating rod rotatably connected to the base, the rotating rod and one of the rotating shafts are transmitted through a synchronous belt assembly, and a brush roller in contact with the belt assembly is fixedly mounted on the rotating rod for removing impurities attached to the belt assembly.

[0014] As a further explanation, the strength testing device for packaging box production also includes rubber strips fixed to the support plate at even intervals to increase the friction between the packaging box and the support plate.

[0015] The beneficial effects of the present invention are:

[0016] 1. The belt assembly rotates forward to drive the packaging box to move to the right to just below the pressure plate, and then the hydraulic cylinder is started to drive the pressure plate to move downward to contact the packaging box. The pressure plate applies pressure to the top of the packaging box to complete the strength test from top to bottom. At the same time, the stepper motor is started to make side plates I and II apply pressure to the sides of the packaging box to complete the strength test of the sides. In this way, the strength test of the top and sides of the packaging box can be continuously performed, and the test is more comprehensive, thereby improving the accuracy of the strength test.

[0017] 2. Under the action of the support plate, whenever the support plate moves upward, the support plate drives the packaging box to move upward and disengage from the belt assembly, so as to prevent the packaging box from contacting the belt assembly during the strength test and causing the belt assembly to be damaged by force, thereby ensuring the safety of the belt assembly.

[0018] 3. Under the action of the friction rod, whenever the side plate I applies pressure to the side of the packaging box, the friction rod contacts the outer wall of the packaging box, and the friction rod rotates to rub the packaging box. The friction rod performs scratch resistance test on the packaging box. In this way, the scratch resistance of the packaging box can be further tested, thereby further improving the accuracy of the packaging box strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the conveying assembly, rotating shaft and driving motor of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the bidirectional screw rod, side plate I and side plate II of the present invention.

[0022] Figure 4It is a schematic diagram of the three-dimensional structure of the support assembly of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the elastic telescopic rod and the rack II of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the friction assembly of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the disc and the friction rod of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating rod and the brush roller of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the rubber strip of the present invention.

[0028] Among them, the above-mentioned drawings include the following drawing marks: 1. base, 2. guide column, 3. electric lifting plate, 4. hydraulic cylinder, 5. pressure plate, 6. belt assembly, 61. rotating shaft, 62. driving motor, 7. bidirectional screw, 8. side plate I, 9. side plate II, 10. stepping motor, 11. guide rod, 111. movable frame, 112. support plate, 113. spur gear, 114. elastic telescopic rod, 115. rack I, 116. rack II, 12. fixed plate, 121. disc, 1211. friction rod, 122. vertical plate, 123. spline sleeve, 124. spline shaft, 13. rotating rod, 14. brush roller, 15. rubber strip. DETAILED DESCRIPTION

[0029] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0030] Example: A strength testing device for packaging box production, please refer to Figure 1-Figure 5As shown, it includes a base 1 and guide columns 2 symmetrically fixed to the front and rear sides of the base 1, an electric lifting plate 3 is installed between the four guide columns 2, a hydraulic cylinder 4 is installed in the middle of the electric lifting plate 3, and a pressing plate 5 is fixed to the end of the telescopic rod of the hydraulic cylinder 4. When the pressing plate 5 moves downward and contacts the top of the packaging box, the pressing plate 5 can realize the pressure on the packaging box from top to bottom to complete the strength test. It also includes a conveying component, a two-way screw rod 7, a side plate I8, a side plate II9, a stepping motor 10 and a supporting component. The conveying component is installed on the base 1. When the conveying component is in operation, the conveying component can realize the conveying of the packaging box to the bottom of the pressing plate 5 for strength testing. The pressing plate 5 is symmetrically rotatably connected with a two-way screw rod 7, and the threads on the front and rear sides of the two-way screw rod 7 are opposite. The front and rear sides of the bottom of the pressing plate 5 are both symmetrically slidably connected with the side plate I8 The side panels Ⅰ8 on the left and right sides are respectively threadedly connected with the two-way screw rods 7 on the left and right sides. The bottoms of the four side panels Ⅰ8 are fixedly connected with side panels Ⅱ9. The side of the side panels Ⅱ9 on the front and rear sides that are close to each other are evenly spaced with protrusions. A stepper motor 10 is installed on the front side of the top of the pressure plate 5. The output shaft of the stepper motor 10 and the front sides of the two-way screw rods 7 on the left and right sides are driven by a synchronous belt assembly. When the stepper motor 10 is started, the stepper motor 10 drives the two-way screw rod 7 to rotate through the synchronous belt assembly. The two-way screw rod 7 drives the side panels Ⅰ8 and side panels Ⅱ9 to move and contact with the packaging box, so that the side panels Ⅰ8 and side panels Ⅱ9 apply pressure to the side of the packaging box to complete the strength test of the side. The support assembly is installed between the pressure plate 5 and the base 1. When the support assembly is in operation, the support assembly can drive the packaging box to move upward and disengage from the conveying assembly.

[0031] See also Figure 1 and Figure 2 As shown, the conveying assembly includes a belt assembly 6, a rotating shaft 61 and a driving motor 62. The rotating shaft 61 is symmetrically connected to the base 1 for rotation. The belt assembly 6 is evenly spaced between the rotating shafts 61 on the left and right sides. The top of the belt assembly 6 is higher than the top of the base 1. The belt assembly 6 consists of two pulleys and a flat belt, wherein the two pulleys are fixedly mounted on the rotating shafts 61 on the left and right sides, respectively, and the flat belt is wound between the two pulleys. A driving motor 62 is installed on the right rear side of the base 1, and the output shaft end of the driving motor 62 is fixedly connected to the rear end of the right rotating shaft 61.

[0032] See also Figure 4 and Figure 5As shown, the support assembly includes a guide rod 11, a movable frame 111, a support plate 112 and a trigger assembly. The guide rod 11 is fixedly connected to the rear side of the middle of the base 1. The movable frame 111 is slidably mounted on the guide rod 11. The movable frame 111 is slidably connected to the base 1. The two tops of the movable frame 111 are fixedly connected to support plates 112. The support plates 112 are located between adjacent belt assemblies 6. When the support plates 112 move upward, the support plates 112 can drive the packaging box to move upward and disengage from the belt assembly 6. A trigger assembly is arranged between the movable frame 111 and the pressure plate 5. When the trigger assembly is operated, the trigger assembly can drive the movable frame 111 to move up and down. The trigger assembly includes a spur gear 113, an elastic telescopic rod 114, a rack I 115 and a rack II 116. The outer rear side of the movable frame 111 is fixedly connected to the rack II 116. The rear side of the middle part of the base 1 is rotatably connected to the spur gear 113, and the spur gear 113 is meshed with the rack II 116. The rear side of the bottom of the pressure plate 5 is fixedly connected to the elastic telescopic rod 114. The elastic telescopic rod 114 is composed of a sleeve, a sliding rod and a spring, wherein the sleeve is fixedly connected to the rear side of the bottom of the pressure plate 5, the sliding rod is slidably connected to the inner side of the sleeve, the spring is connected between the inner side of the sleeve and the top of the sliding rod, and the lower part of the front side of the elastic telescopic rod 114 is fixedly connected to the rack I 115, and the rack I 115 is meshed with the spur gear 113.

[0033] First, set the pressure of the hydraulic cylinder 4, start the electric lifting plate 3 to drive the hydraulic cylinder 4 to move up and down, the hydraulic cylinder 4 drives the pressure plate 5 to move up and down, when the pressure plate 5 moves up and down to a suitable height for applying pressure to the packaging box, close the electric lifting plate 3, and then start the drive motor 62 to rotate forward intermittently, the drive motor 62 drives the rotating shaft 61 to rotate forward intermittently, the rotating shaft 61 drives the belt assembly 6 to rotate forward intermittently, and then the packaging box can be placed on the belt assembly 6 from the left side through the machine, and the belt assembly 6 rotates forward to drive the packaging box to move to the right for transportation. Whenever the belt assembly 6 stops rotating forward, the machine places the packaging box on the belt assembly 6, so that the spacing between the packaging boxes on the belt assembly 6 is consistent, and when the packaging box moves to the right to be directly below the pressure plate 5, the belt assembly 6 stops rotating. The packing box is moved to the right, and then the hydraulic cylinder 4 is started. The telescopic rod of the hydraulic cylinder 4 is extended to drive the pressure plate 5 to move downward, and the pressure plate 5 drives the side plate I8 to move downward, and the side plate I8 drives the side plate II9 to move downward. The pressure plate 5 also drives the elastic telescopic rod 114 to move downward, and the elastic telescopic rod 114 moves downward to drive the rack I115 to move downward, and the rack I115 moves downward to drive the spur gear 113 to rotate forward, and the spur gear 113 rotates forward to drive the rack II116 to move upward, and the rack II116 moves upward to drive the movable frame 111 to move upward, and the movable frame 111 drives the support plate 112 to move upward, and the support plate 112 moves upward to contact with the bottom of the packing box, and the support plate 112 drives the packing box to move upward and disengage from the belt assembly 6 to prevent the packing box from being forced During the strength detection process, the belt assembly 6 contacts with the belt assembly 6, causing the belt assembly 6 to be damaged by force, thereby ensuring the safety of the belt assembly 6. When the elastic telescopic rod 114 moves downward and contacts the inner side of the base 1, the base 1 limits the elastic telescopic rod 114, and the elastic telescopic rod 114 causes the rack I 115 to stop moving downward, and the support plate 112 also stops moving upward. The pressing plate 5 continues to move downward to compress the elastic telescopic rod 114. When the pressing plate 5 moves downward and contacts the top of the packaging box, the pressing plate 5 moves downward to apply pressure to the top of the packaging box for strength detection, thus completing the pressure from top to bottom. At the same time, the stepper motor 10 is started, and the stepper motor 10 rotates and drives the bidirectional screw rod 7 to rotate forward through the synchronous belt assembly. The bidirectional screw rod 7 rotates forward to drive the front and rear sides. The side panels Ⅰ8 move toward each other, and the side panels Ⅰ8 on the front and rear sides move toward each other and contact the side edge of the packaging box, and the side panels Ⅰ8 apply pressure to the side edge of the packaging box to perform strength testing. At the same time, the side panels Ⅰ8 drive the side panels Ⅱ9 on the front and rear sides to move toward each other, and the side panels Ⅱ9 on the front and rear sides move toward each other and contact the packaging box. Due to the raised setting of the side panels Ⅱ9, the side panels Ⅱ9 apply pressure to the packaging box in a small area to complete the strength testing. In this way, the side panels Ⅰ8 and Ⅱ9 can complete the strength testing of the large and small areas of the side edge of the packaging box, thereby improving the accuracy of the strength testing of the side edge of the packaging box. When the side panels Ⅰ8, Ⅱ9 and the pressure plate 5 complete the strength testing of the packaging box, the stepper motor 10 is started to reverse.The stepper motor 10 drives the bidirectional screw rod 7 to reverse through the synchronous belt assembly, and the bidirectional screw rod 7 drives the side plates Ⅰ8 on the front and rear sides to move and reset in the directions away from each other. The side plates Ⅰ8 are reset and drive the side plates Ⅱ9 on the front and rear sides to move and reset in the directions away from each other. Then the hydraulic cylinder 4 is started to drive the pressure plate 5 to move and reset upward. The pressure plate 5 is reset and disengaged from the packaging box. The pressure plate 5 is reset and drives the elastic telescopic rod 114 to move upward and reset. The elastic telescopic rod 114 drives the rack Ⅰ115 to move upward and reset. The rack Ⅰ115 drives the movable frame 111 to move downward and reset through the spur gear 113 and the rack Ⅱ116. The movable frame 111 drives the support plate 112 to move downward and reset. The support plate 112 drives the packaging box to move downward and reset. The packaging box is reset and contacts the belt assembly 6. The belt assembly 6 continues to rotate forward to drive the tested packaging box to move to the right for transportation, and moves the next packaging box to the right to just below the pressure plate 5. This is repeated, and the strength of the top and sides of the packaging box can be continuously tested, and the test is more comprehensive, thereby improving the accuracy of the strength test. When all the packaging boxes have been tested for strength, the drive motor 62 is turned off, the belt assembly 6 stops rotating, and the operator can check the packaging boxes after testing. If the packaging boxes are deformed or damaged, it means that the strength of the packaging boxes is unqualified, otherwise it is qualified.

[0034] See also Figure 6 and Figure 7 As shown, the strength testing equipment for packaging box production also includes a friction assembly installed between the stepper motor 10 and the side plate Ⅰ8, the friction assembly includes a fixed plate 12, a disc 121, a friction rod 1211 and a rotating assembly, the fixed plate 12 is fixedly connected between the sides of the left and right side plates Ⅰ8 close to each other, the middle of the fixed plate 12 is rotatably penetrated by the disc 121, and the rear side of the disc 121 is evenly spaced and fixedly connected with friction rods 1211. When the friction rod 1211 rotates, the friction rod 1211 can realize a friction test on the packaging box to complete the scratch resistance of the packaging box. It is detected that a rotating component is arranged between the disc 121 and the stepper motor 10. When the rotating component is in operation, the rotating component can drive the disc 121 to rotate; the rotating component includes a vertical plate 122, a spline sleeve 123 and a spline shaft 124. The vertical plate 122 is fixedly connected to the front side of the bottom of the pressure plate 5. The spline sleeve 123 is rotatably connected to the lower part of the vertical plate 122. The outer front side of the spline sleeve 123 and the output shaft of the stepper motor 10 are driven by a synchronous belt assembly. The spline shaft 124 is slidably connected to the inner side of the spline sleeve 123. The rear end of the spline shaft 124 is fixedly connected to the middle part of the front side of the disc 121.

[0035] When the stepper motor 10 is started, the stepper motor 10 drives the spline sleeve 123 to rotate through the synchronous belt assembly, the rotation of the spline sleeve 123 drives the spline shaft 124 to rotate, the rotation of the spline shaft 124 drives the disc 121 to rotate, the disc 121 drives the friction rod 1211 to rotate, and then the side plates Ⅰ8 on the front and rear sides move toward each other to contact the packaging box to apply pressure, the front side plate Ⅰ8 drives the disc 121 to move backward through the fixed plate 12, the disc 121 drives the friction rod 1211 to move backward and contact the packaging box, the friction rod 1211 rotates on the packaging box The friction rod 1211 performs anti-scratch test on the packaging box. When the side plates Ⅰ8 on the front and rear sides move away from each other and reset, the front side plate Ⅰ8 resets and drives the disc 121 to move forward and reset through the fixed plate 12, and the disc 121 drives the friction rod 1211 to move forward and reset, and the friction rod 1211 resets and disengages from the packaging box, and the stepper motor 10 is turned off, and the stepper motor 10 stops driving the spline sleeve 123 to rotate, the spline sleeve 123 stops driving the disc 121 to rotate through the spline shaft 124, and the disc 121 stops driving the friction rod 1211 to rotate. In this way, the anti-scratch property of the packaging box can be further tested, thereby further improving the accuracy of the strength of the packaging box.

[0036] See also Figure 8 As shown, the strength testing equipment for packaging box production also includes a rotating rod 13 and a brush roller 14. The rotating rod 13 is rotatably connected to the lower right side of the base 1. The front side of the rotating rod 13 and the front side of the right rotating shaft 61 are driven by a synchronous belt assembly. The brush roller 14 is fixedly mounted on the middle part of the rotating rod 13. The brush roller 14 is in contact with the belt assembly 6. When the brush roller 14 rotates, the brush roller 14 can remove impurities attached to the belt assembly 6.

[0037] See also Fig. 9 As shown, the strength testing device for packaging box production also includes a rubber strip 15. Three rubber strips 15 are evenly spaced and fixed to the tops of the front and rear support plates 112. The rubber strips 15 can increase the friction between the rubber strips 15 and the packaging box.

[0038] When the driving motor 62 starts to rotate forward, the right rotating shaft 61 rotates forward and drives the rotating rod 13 to rotate forward through the synchronous belt assembly, and the rotating rod 13 rotates forward and drives the brush roller 14 to rotate forward, and the brush roller 14 rotates forward to remove impurities attached to the belt assembly 6. When the driving motor 62 is turned off, the right rotating shaft 61 stops driving the rotating rod 13 to rotate forward, and the rotating rod 13 stops driving the brush roller 14 to rotate forward. In this way, the impurities attached to the belt assembly 6 can be prevented from being corroded and affecting the use, thereby ensuring the service life of the belt assembly 6.

[0039] When the support plate 112 moves upward, the support plate 112 drives the rubber strip 15 to move upward, and the rubber strip 15 moves upward and contacts the packaging box. The support plate 112 drives the packaging box to move upward through the rubber strip 15 and disengages from the belt assembly 6. The rubber strip 15 increases the friction between the rubber strip 15 and the packaging box, so that the packaging box can be more firmly placed on the support plate 112.

[0040] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A strength testing device for packaging box production, comprising a base (1) and guide columns (2) symmetrically fixed to both sides of the base (1), an electric lifting plate (3) is installed between the guide columns (2), a hydraulic cylinder (4) is installed on the electric lifting plate (3), and a pressing plate (5) is fixed to the end of the telescopic rod of the hydraulic cylinder (4), which is used to apply pressure to the packaging box from top to bottom to complete the strength test, characterized in that: The invention also comprises a conveying assembly, a bidirectional screw rod (7), a side plate I (8), a side plate II (9), a stepping motor (10) and a supporting assembly. The conveying assembly is mounted on the base (1) and is used to convey the packaging box to the bottom of the pressing plate (5). The pressing plate (5) is symmetrically and rotatably connected with a bidirectional screw rod (7). The threads on the front and rear sides of the bidirectional screw rod (7) are opposite. The front and rear sides of the bottom of the pressing plate (5) are symmetrically and slidably connected with the side plate I (8). The side plate I (8) is threadedly connected to the bidirectional screw rod (7). The bottom of the side plate I (8) is fixedly connected with the side plate II (9). The side plate II (9) is evenly spaced with protrusions. The pressing plate ( 5) A stepper motor (10) is installed on the top, and the output shaft of the stepper motor (10) and the bidirectional screw rod (7) are driven by a synchronous belt assembly. When the stepper motor (10) is started, the stepper motor (10) drives the bidirectional screw rod (7) to rotate through the synchronous belt assembly, and the bidirectional screw rod (7) drives the side plate I (8) and the side plate II (9) to move and contact with the packaging box, so that the side plate I (8) and the side plate II (9) apply pressure to the side of the packaging box to complete the strength test of the side. The support assembly is installed between the pressure plate (5) and the base (1), and is used to drive the packaging box to move upward and disengage from the conveying assembly.

2. A strength testing device for packaging box production as claimed in claim 1, characterized in that: The conveying assembly comprises a rotating shaft (61) symmetrically connected to a base (1), belt assemblies (6) are evenly spaced and connected between the rotating shafts (61), the top of the belt assembly (6) is higher than the top of the base (1), a driving motor (62) is mounted on the base (1), and the end of the output shaft of the driving motor (62) is fixedly connected to the end of one of the rotating shafts (61).

3. A strength testing device for packaging box production as claimed in claim 2, characterized in that: The support assembly comprises a guide rod (11) fixedly connected to the base (1); a movable frame (111) slidably mounted on the guide rod (11) and slidably connected to the base (1); a support plate (112) fixedly connected to the top of the movable frame (111) and used for driving the packaging box to move upward and disengage from the belt assembly (6); the support plate (112) is located between adjacent belt assemblies (6); and a trigger assembly is provided between the movable frame (111) and the pressure plate (5) and used for driving the movable frame (111) to move.

4. A strength testing device for packaging box production as claimed in claim 3, characterized in that: The trigger assembly comprises a rack II (116) fixedly connected to the outer side of the movable frame (111); a spur gear (113) meshing with the rack II (116) is rotatably connected to the base (1); an elastic telescopic rod (114) is fixedly connected to the bottom of the pressure plate (5); and a rack I (115) meshing with the spur gear (113) is fixedly connected to the elastic telescopic rod (114).

5. A strength testing device for packaging box production as claimed in claim 4, characterized in that: The strength testing device for packaging box production also includes a friction component, which includes a fixed plate (12) fixedly connected between the side plates Ⅰ (8) on both sides of the front, a disc (121) rotatably connected to the fixed plate (12), and friction rods (1211) fixedly connected to the disc (121) at even intervals for performing friction testing on the packaging box, and a rotating component is arranged between the disc (121) and the stepping motor (10) for driving the disc (121) to rotate.

6. A strength testing device for packaging box production as claimed in claim 5, characterized in that: The rotating assembly comprises a vertical plate (122) fixedly connected to the bottom of the pressure plate (5), a spline sleeve (123) rotatably connected to the vertical plate (122), the spline sleeve (123) and the output shaft of the stepper motor (10) are driven by a synchronous belt assembly, a spline shaft (124) is slidably connected to the inner side of the spline sleeve (123), and the end of the spline shaft (124) is fixedly connected to the middle of the disc (121).

7. A strength testing device for packaging box production as claimed in claim 6, characterized in that: The strength testing device for packaging box production also includes a rotating rod (13) rotatably connected to the base (1), the rotating rod (13) and one of the rotating shafts (61) are driven by a synchronous belt assembly, and a brush roller (14) in contact with the belt assembly (6) is fixedly mounted on the rotating rod (13) for removing impurities attached to the belt assembly (6).

8. A strength testing device for packaging box production as claimed in claim 7, characterized in that: The strength testing device for packaging box production also includes rubber strips (15) fixed to the support plate (112) at even intervals, which are used to increase the friction between the rubber strips and the packaging box.

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