Plastic package toughness strength detection device

Abstract

The invention discloses a plastic package toughness strength detection device, and relates to the field of plastic product production detection, a longitudinal slide rail is fixed on a base, a frame body is slidably assembled on the longitudinal slide rail, a liftable limiting mechanism is arranged on one side of the frame body, and a height-adjustable fixing mechanism is fixed below the limiting mechanism; a detection mechanism controlled by a driving mechanism is arranged at the bottom of the frame body; the longitudinal sliding rail comprises an electric sliding block which is in sliding connection; the driving mechanism comprises a first motor which is in transmission connection with a spline shaft; the limiting mechanism comprises a hydraulic oil cylinder, and a supporting block is fixed to an oil cylinder push rod of the hydraulic oil cylinder. The fixing mechanism comprises an annular hoop frame; the detection mechanism comprises a second motor, the second motor is in transmission connection with a sun gear, the sun gear is rotationally connected with a planet gear, the planet gear is rotationally connected with a lead screw seat through a worm, a lead screw nut is fixed to a ball screw of the lead screw seat, and a detection head is fixed to the lead screw nut. Compared with the prior art, the system has the advantages of comprehensive detection functions and high adaptability.

Description

Technical Field

[0001] This invention relates to the field of plastic product manufacturing and testing, specifically to a device for testing the toughness and strength of plastic packaging. Background Technology

[0002] In the plastic packaging industry, the toughness and strength of plastic packaging is one of the key indicators for measuring its quality. Good toughness and strength ensure that plastic packaging can effectively resist external forces such as squeezing and impact during transportation, storage, and use, preventing packaging breakage and thus protecting the contents from damage. Therefore, accurate toughness and strength testing of plastic packaging is crucial.

[0003] Currently, there are some plastic packaging toughness strength testing devices on the market, but these existing technologies and devices have many shortcomings: (1) Single testing function: Most existing testing devices can only perform single-direction testing, such as longitudinal tensile testing or transverse compression testing. In actual use scenarios, plastic packaging is often subjected to both longitudinal and transverse forces at the same time. Single-direction testing cannot comprehensively and truthfully reflect the toughness strength of plastic packaging in actual applications, and it is difficult to meet the needs of comprehensive evaluation of plastic packaging quality. (2) Poor adaptability: Different types and specifications of plastic packaging have differences in size, shape and material characteristics. Existing testing devices are difficult to flexibly adjust according to the characteristics of different plastic packaging. For example, they cannot adjust the fixed height according to the length of the plastic packaging, and cannot select the appropriate testing force and testing head type according to the thickness of the side wall, resulting in poor versatility of the testing devices and inability to meet diverse testing needs. Summary of the Invention

[0004] The purpose of this invention is to provide a plastic packaging toughness and strength testing device to solve the problems of limited testing functions and poor adaptability in the existing technology, and to achieve comprehensive, accurate and efficient toughness and strength testing of plastic packaging.

[0005] Specifically, the technical solution provided by this invention is: a plastic packaging toughness and strength testing device, comprising: The base has a vertical slide rail fixed on it, and a frame is slidably mounted on the vertical slide rail. A height-adjustable limit mechanism is provided on one side of the frame, and a height-adjustable fixing mechanism is fixed below the limit mechanism. A detection mechanism controlled by a drive mechanism is provided at the bottom of the frame. The longitudinal slide rail includes a slidably connected electric slider, which is connected to the frame via a first support arm. The drive mechanism includes a first motor, which is driven by a splined shaft, and the bottom end of the splined shaft is interference-fitted with a detection mechanism. The limiting mechanism includes a hydraulic cylinder, a support block is fixed on the cylinder push rod of the hydraulic cylinder, and a first clamping bracket and a second clamping bracket are connected to both sides of the support block by a linear connecting rod and a ring connecting rod, respectively. The fixing mechanism includes an annular hoop, which is mounted on the side of the longitudinal slide rail via a second support arm. The annular hoop is adapted to the first clamping hoop and the second clamping hoop. The testing mechanism includes a second motor, which is connected to a sun gear. The sun gear is connected to planetary gears, which are connected to a lead screw seat via a worm gear. A lead screw nut is fixed on the ball screw of the lead screw seat, and a testing head is fixed on the lead screw nut.

[0006] Preferably, the frame also includes a motor bracket, on which a first motor with its motor shaft facing downwards is fixed. A first pulley is mounted on the motor shaft of the first motor. The first pulley is rotatably connected to a second pulley on one side via a transmission belt. The second pulley is interference-fitted onto a splined shaft. Below the second pulley is a coaxially connected ball spline, which is rotatably connected to the splined shaft.

[0007] Preferably, a bearing seat is also provided on one side of the motor bracket, and the splined shaft is rotatably connected to the bearing seat.

[0008] Preferably, the detection mechanism further includes a cylindrical housing, inside which is a fixed-axis sun gear, and a plurality of fixed-axis planet gears are rotatably connected to the side of the sun gear, and a planet carrier is rotatably connected to the outer side of the planet gears.

[0009] Preferably, each planetary gear is interference-fitted onto a longitudinally positioned first drive shaft, and a worm gear is coaxially connected above the planetary gear. The worm gear is also interference-fitted onto the first drive shaft, and a worm is rotatably connected to one side of the worm gear. The worm is rotatably connected to a lead screw seat.

[0010] Preferably, the lead screw nut is fixed to the end of the ball screw, and the lead screw nut is provided with a pin hole, at which a detachable detection head is assembled by a positioning pin.

[0011] Preferably, the detection head includes a spherical, rectangular, conical, or cylindrical structure. The detection head is connected to a pin bracket via a third support arm, and the detection head is fixed to the pin hole of the lead screw nut via the pin bracket with a positioning pin.

[0012] Preferably, the bottom of the cylindrical housing is provided with a recessed motor mounting position, on which a second motor is fixed. The motor shaft end of the second motor is press-fitted with a second conical tooth. One side of the second conical tooth is rotatably connected to a first conical tooth. The first conical tooth is press-fitted to the end of a longitudinally placed second transmission shaft. The other end of the second transmission shaft is press-fitted with a sun gear.

[0013] Preferably, the bottom of the linear connecting rod is connected to a first clamping bracket via a first column, and the bottom of the annular connecting rod is connected to a second clamping bracket via a second column; the hydraulic cylinder is fixed to the side of the frame, and the annular connecting rod is arranged around the frame; the bottom of the first clamping bracket and the second clamping bracket are provided with annular grooves, and the top of the annular bracket is provided with annular protrusions that are adapted to the annular grooves.

[0014] Preferably, the longitudinal slide rail has multiple first threaded holes at equal intervals from top to bottom on its side, the annular hoop has second threaded holes on its side, and the second support arm has protruding threaded posts at both ends. The second support arm is connected to the annular hoop and the longitudinal slide rail respectively through the threaded posts. The first clamping hoop has a notch on its side, which is used for the second support arm to pass through.

[0015] Compared with the prior art, the advantages of this invention are: (1) Comprehensive detection function: Through the coordinated work of the driving mechanism and the detection mechanism, the detection device of this invention can simultaneously perform longitudinal and transverse toughness tests on plastic packaging, which more comprehensively and realistically reflects the toughness and strength of plastic packaging in actual applications, solves the problem of single detection function in the prior art, and provides a reliable basis for the comprehensive evaluation of plastic packaging quality. (2) Strong adaptability: The position of the ring hoop can be changed by adjusting the fixed height of the second arm on the longitudinal slide rail according to the length of different plastic packaging; it can also select the appropriate extension distance and appropriate detection head type according to the thickness characteristics of the side wall. This flexible adjustment method enables the detection device to adapt to different types and specifications of plastic packaging and meet diverse detection needs. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram showing the connection between the drive mechanism and the frame of the present invention.

[0019] Figure 3 This is a diagram showing the cylindrical shell and internal components of the testing mechanism of this invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of the detection mechanism of the present invention.

[0021] Figure 5 These are schematic diagrams illustrating the structures of different types of detection heads of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of enlarged region A of the present invention.

[0023] Figure 7 This is a schematic diagram of the bottom structure of the cylindrical shell of the detection mechanism of the present invention.

[0024] Figure 8 This is a schematic diagram of the limiting mechanism of the present invention.

[0025] Figure 9 This is a schematic diagram showing the connection between the fixing mechanism and the longitudinal slide rail of the present invention.

[0026] Figure 10 This is a schematic diagram showing the connection between the limiting mechanism and the fixing mechanism of the present invention.

[0027] As shown in the figure: 1. Base, 2. Control panel, 3. Vertical slide rail, 301. Electric slider, 302. First threaded hole, 303. First support arm, 4. Frame, 401. Motor bracket, 402. Shaft seat, 5. Drive mechanism, 501. First motor, 502. First pulley, 503. Transmission belt, 504. Second pulley, 505. Splined shaft, 506. Ball spline, 6. Limiting mechanism, 601. Hydraulic cylinder, 602. Support block, 603. Linear connecting rod, 604. First column, 605. Annular connecting rod, 606. Second column, 607. First clamping bracket, 608. Second clamping bracket, 609. Notch, 610. Annular groove 7. Fixing mechanism; 701. Second support arm; 702. Threaded column; 703. Annular hoop; 704. Second threaded hole; 705. Annular convex strip; 8. Detection mechanism; 801. Cylindrical housing; 802. Planetary carrier; 803. Planetary gear; 804. Sun gear; 805. Worm gear; 806. First drive shaft; 807. Worm; 808. Screw seat; 809. Ball screw; 810. Screw nut; 811. Pin hole; 812. Detection head; 813. Third support arm; 814. Pin connector; 815. Positioning pin; 816. Second drive shaft; 817. First conical tooth; 818. Second conical tooth; 819. Second motor; 820. Motor mounting position. Detailed Implementation

[0028] Example 1 This embodiment provides a device for testing the toughness and strength of plastic packaging, specifically a detailed implementation method regarding the composition and structural features of its components.

[0029] like Figure 1 As shown, the base 1 serves as the basic support structure for the entire testing device, providing a stable mounting platform for other components. A longitudinal slide rail 3 is fixed on the base 1, providing a track for the longitudinal movement of the frame 4. The control panel 2 is used to operate various actions of the testing device, such as the movement of the electric slider 301, the operation of the hydraulic cylinder 601, and the forward and reverse rotation of the first motor 501 and the second motor 819, achieving precise control of the testing process.

[0030] like Figure 1 and Figure 9 As shown, the longitudinal slide rail 3 includes a slidingly connected electric slider 301 and a slide rail body with multiple first threaded holes 302 evenly spaced from top to bottom. The electric slider 301 is connected to the frame 4 through the first support arm 303, providing the frame 4 with the power and track for longitudinal movement. The first threaded holes 302 are used to connect with the second support arm 701 to adjust the height of the annular hoop 703.

[0031] like Figure 1 and Figure 2 As shown, the frame 4 serves as the mounting carrier for the drive mechanism 5, the limiting mechanism 6, and the detection mechanism 8. It includes a motor bracket 401 and a shaft seat 402. The motor bracket 401 is used to fix the first motor 501, and the shaft seat 402 provides rotational support for the spline shaft 505.

[0032] like Figure 2 As shown, the drive mechanism 5 includes a first motor 501, a first pulley 502 mounted on the motor shaft of the first motor 501, and a second pulley 504 rotatably connected to one side of the first pulley 502 via a transmission belt 503. The second pulley 504 is interference-fitted onto a splined shaft 505, and a ball spline 506 coaxially connected below the second pulley 504. The splined shaft 505 is rotatably connected to a shaft seat 402. When the first motor 501 is working, it drives the splined shaft 505 to rotate via belt drive. Under the action of the ball spline 506, the splined shaft 505 is rotated to extend and retract, thereby driving the detection mechanism 8 to move longitudinally.

[0033] like Figure 8 As shown, the limiting mechanism 6 includes a hydraulic cylinder 601, which is fixed to the side of the frame 4. A support block 602 is fixed on the cylinder push rod. The two sides of the support block 602 are respectively connected to a first clamping bracket 607 and a second clamping bracket 608 via a linear connecting rod 603 and an annular connecting rod 604. The bottom of the linear connecting rod 603 is connected to the first clamping bracket 607 via a first column 604, and the bottom of the annular connecting rod 604 is connected to the second clamping bracket 608 via a second column 606. Arranged around the frame 4, the first clamping bracket 607 and the second clamping bracket 608 are provided with annular grooves 610 at their bottoms. The first clamping bracket 607 is provided with a notch 609 on its side for the second support arm 701 to pass through. When the hydraulic cylinder 601 is working, the cylinder push rod pushes down and drives the first clamping bracket 607 and the second clamping bracket 608 to press down synchronously, so that the annular groove 610 fits against the annular protrusion 705 of the annular bracket 703 and is pressed tightly, thereby realizing the limiting and fixing of the plastic packaging on the annular bracket 703.

[0034] like Figure 9 and Figure 10As shown, the fixing mechanism 7 includes an annular hoop 703, which is mounted on the side of the longitudinal slide rail 3 via a second support arm 701. The second support arm 701 has protruding threaded posts 702 at both ends, and the annular hoop 703 has a second threaded hole 704 on its side. The second support arm 701 is connected to the annular hoop 703 and the longitudinal slide rail 3 via the threaded posts 702. The top of the annular hoop 703 has an annular protrusion 705 that matches the annular groove 610 at the bottom of the first clamping hoop 607 and the second clamping hoop 608, which is used to fix the edge of the bag opening of the plastic packaging. The position of the annular hoop 703 can be changed by adjusting the fixing height of the second support arm 701 on the longitudinal slide rail 3 to accommodate plastic packaging of different lengths.

[0035] like Figures 3 to 7 As shown, the detection mechanism 8 includes a cylindrical housing 801, within which a fixed-axis sun gear 804 is housed. Multiple fixed-axis planetary gears 803 are rotatably connected to the side of the sun gear 804. A planet carrier 802 is rotatably connected to the outer side of each planetary gear 803. Each planetary gear 803 is interference-fitted onto a longitudinally positioned first transmission shaft 806. A worm gear 805 is coaxially connected above each planetary gear 803, also interference-fitted onto the first transmission shaft 806. A worm wheel 805 is rotatably connected to one side of the worm gear 805. A worm gear 807 is rotatably connected to a lead screw seat 808. A lead screw nut 810 is fixed on a ball screw 809 of the lead screw seat 808. The lead screw nut 810 has a pin hole 811. A detachable detection head 812 is assembled at the pin hole 811 via a positioning pin 815. The detection head 812 includes spherical, rectangular, conical, and cylindrical structures. The detection head 812 is connected to a pin connector 814 via a third support arm 813. The detection head 812 is connected to the lead screw nut via the pin connector 814 with the positioning pin 815. The pin hole 811 of 810 is fixed. The bottom of the cylindrical housing 801 is provided with a recessed motor mounting position 820. A second motor 819 is fixed on the motor mounting position 820. The motor shaft end of the second motor 819 is interference-fitted with a second bevel gear 818. A first bevel gear 817 is rotatably connected to one side of the second bevel gear 818. The first bevel gear 817 is interference-fitted to the end of a longitudinally placed second transmission shaft 816. The other end of the second transmission shaft 816 is interference-fitted with a sun gear 804. The second motor 819... During operation, the bevel gear transmission drives the second transmission shaft 816 to rotate, which in turn drives the sun gear 804 to rotate, causing the planet gear 803 to rotate and drive the worm gear 805 to rotate. The worm 807 transmits the driving force to the lead screw seat 808, causing the ball screw 809 to move linearly to extend or retract, thereby pushing or retracting the detection head 812 outward, realizing the lateral compression, impact, or resistance of the side wall of the plastic packaging. In conjunction with the rotation and lifting of the spline shaft 505, the longitudinal and lateral toughness tests of the plastic packaging are realized simultaneously.

[0036] Example 2 This embodiment provides a device for testing the toughness and strength of plastic packaging. Specifically, it describes the specific implementation method and functional principle of the device.

[0037] like Figures 1 to 10 As shown, the fixed height of the second support arm 701 on the longitudinal slide rail 3 is adjusted according to the length of the plastic package to be inspected. The second support arm 701 has protruding threaded posts 702 at both ends, and the annular clamp 703 has second threaded holes 704 on its side. The threaded posts 702 of the second support arm 701 are screwed into the first threaded holes 302 and the second threaded holes 704 of the annular clamp 703 at appropriate heights on the longitudinal slide rail 3, thereby changing the position of the annular clamp 703 to accommodate plastic packages of different lengths. With the plastic package opening upwards, it is pulled out through the central gap of the annular clamp 703, and the edge of the opening is laid flat on the annular protrusion 705 of the annular clamp 703. The annular protrusion 705 provides stable support for the edge of the plastic package opening, preventing the opening from slipping during inspection. The electric slider 301 is adjusted downwards along the longitudinal slide rail 3 by the control panel 2, bringing the frame 4 and its mounting limiting mechanism 6 and inspection mechanism 8 closer to the plastic package. The limiting mechanism 6 includes a hydraulic cylinder 601, which is fixed to the side of the frame 4. A support block 602 is fixed on the cylinder push rod. The two sides of the support block 602 are connected to a first clamping bracket 607 and a second clamping bracket 608 via a linear connecting rod 603 and an annular connecting rod 604, respectively. The bottom of the linear connecting rod 603 is connected to the first clamping bracket 607 via a first column 604, and the bottom of the annular connecting rod 604 is connected to the second clamping bracket 608 via a second column 606. The annular connecting rod 604 is arranged around the frame 4. The side of the first clamping bracket 607 is provided with a notch 609 for the second support arm 701 to pass through.

[0038] Then, the clamping operation is performed. The hydraulic cylinder 601 is operated via the control panel 2, causing its push rod to extend downwards, moving the support block 602 downwards. The support block 602, through the linear connecting rod 603 and the annular connecting rod 604, pulls the first clamping bracket 607 and the second clamping bracket 608 downwards simultaneously. The bottom of the first clamping bracket 607 and the second clamping bracket 608 is provided with annular grooves 610. During the downward pressing process, the annular grooves 610 conform to the annular protrusions 705 of the annular bracket 703, thus achieving the limiting and fixing of the plastic packaging on the annular bracket 703, ensuring that the plastic packaging will not shift during the inspection process.

[0039] Next, the longitudinal movement of the detection mechanism 8 is controlled by the control panel 2, which operates and rotates the first motor 501 in the forward direction. A first pulley 502 is mounted on the motor shaft of the first motor 501. The first pulley 502 is rotatably connected to a second pulley 504 on one side via a transmission belt 503. The second pulley 504 is interference-fitted onto a splined shaft 505. A coaxially connected ball spline 506 is located below the second pulley 504. The splined shaft 505 is rotatably connected to a shaft seat 402. When the first motor 501 operates, the motor shaft drives the first pulley 502 to rotate. The first pulley 502, via the transmission belt 503, drives the second pulley 504 to rotate, and the splined shaft 505, integral with the second pulley 504, rotates accordingly. Under the action of the ball spline 506, the splined shaft 505 rotates downwards and extends, driving the cylindrical housing 801 of the detection mechanism 8 into the bag from the top opening of the plastic packaging until it reaches the bottom of the bag. Upon reaching the bottom of the bag, the staff controls the first motor 501 to flip via the control panel 2. The spline shaft 505 rotates upward and retracts under the action of the ball spline 506, realizing the rotation and return of the cylindrical shell 801. This enables the longitudinal lifting and lowering of the testing mechanism 8 inside the plastic packaging, preparing for the subsequent toughness test.

[0040] Next, the detection mechanism 8 is controlled to perform lateral detection. While the drive mechanism 5 moves the detection mechanism 8 longitudinally, the operator controls the second motor 819 to operate and rotate forward via the control panel 2. The bottom of the cylindrical housing 801 has a recessed motor mounting position 820. The second motor 819 is fixed on the motor mounting position 820. The motor shaft of the second motor 819 is press-fitted with a second conical tooth 818. One side of the second conical tooth 818 is rotatably connected to a first conical tooth 817. The first conical tooth 817 is press-fitted to the end of a longitudinally placed second transmission shaft 816. The other end of the second transmission shaft 816 is press-fitted with a sun gear 804. When the second motor 819 operates, the rotational connection between the second conical tooth 818 and the first conical tooth 817 drives the second transmission shaft 816 to rotate, and the sun gear 804 on the second transmission shaft 816 rotates accordingly. A fixed-axis sun gear 804 is housed within a cylindrical housing 801. Multiple fixed-axis planetary gears 803 are rotatably connected to the side of the sun gear 804, and a planet carrier 802 is rotatably connected to the outer side of each planetary gear 803. Each planetary gear 803 is interference-fitted onto a longitudinally positioned first drive shaft 806. A worm gear 805 is coaxially connected above each planetary gear 803, and is also interference-fitted onto the first drive shaft 806. A worm 807 is rotatably connected to one side of the worm gear 805, and the worm 807 is rotatably connected to a lead screw seat 808. The rotation of the planetary gears 803 meshing with the sun gear 804 drives the worm gear 805 above them to rotate, and the worm 807, rotatably connected to the worm gear 805, transmits positive driving force to the lead screw seat 808. The lead screw seat 808 adopts the structure of a lead screw jack. When its ball screw 809 receives a positive driving force, it extends outward in a linear motion, thus pushing the detection head 812, pinned to the end of the screw, outward. The detection head 812 includes spherical, rectangular, conical, and cylindrical structures. The detection head 812 is connected to a pin-connecting frame 814 via a third support arm 813. The detection head 812 is fixed to the pin hole 811 of the lead screw nut 810 via the pin-connecting frame 814 with a positioning pin 815. After the detection head 812 is pushed outward, it serves to laterally compress, impact, or press against the side wall of the plastic packaging.

[0041] The cylindrical housing 801, which includes the detection head 812, rotates and rises with the spline shaft 505, simultaneously performing longitudinal and transverse toughness tests on the plastic packaging. During this process, the reciprocating lifting and lowering can be repeated multiple times. Operators can adjust the rotation of the second motor 819 via the control panel 2 according to the sidewall thickness characteristics of different plastic packages, thereby selecting the appropriate extension distance of the detection head 812 to meet the testing needs of different products.

[0042] After completing the above testing process, the operation of the first motor 501 and the second motor 819 is stopped sequentially via the control panel 2. The cylinder push rod of the hydraulic cylinder 601 is then retracted upwards, causing the first clamping bracket 607 and the second clamping bracket 608 to loosen their pressure on the plastic packaging. Then, the electric slider 301 is moved upwards, moving the frame 4 and the testing mechanism 8 away from the plastic packaging. Finally, the tested plastic packaging is removed, and relevant data from the testing process is recorded, such as the extension distance of the testing head 812, the number of cycles, and the deformation of the plastic packaging, in order to evaluate and analyze the toughness and strength of the plastic packaging.

[0043] In summary, through the detailed workflow and working principle described above, this plastic packaging toughness and strength testing device can comprehensively and accurately test the toughness and strength of plastic packaging, meeting the diverse testing needs of different types and specifications of plastic packaging. Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for testing the toughness and strength of plastic packaging, characterized in that... include: The base (1) is fixed with a longitudinal slide rail (3), and a frame (4) is slidably mounted on the longitudinal slide rail (3). A lifting limit mechanism (6) is provided on one side of the frame (4), and a height-adjustable fixing mechanism (7) is fixed below the limit mechanism (6). A detection mechanism (8) controlled by a drive mechanism (5) is provided at the bottom of the frame (4). The longitudinal slide rail (3) includes a slidingly connected electric slider (301), which is connected to the frame (4) via a first support arm (303). The drive mechanism (5) includes a first motor (501), which is connected to a splined shaft (505). The bottom end of the splined shaft (505) is interference-fitted with a detection mechanism (8). The limiting mechanism (6) includes a hydraulic cylinder (601), and a support block (602) is fixed on the cylinder push rod of the hydraulic cylinder (601). The first clamping bracket (607) and the second clamping bracket (608) are connected to both sides of the support block (602) through a linear connecting rod (603) and an annular connecting rod (605). The fixing mechanism (7) includes an annular hoop (703), which is mounted on the side of the longitudinal slide rail (3) via a second support arm (701). The annular hoop (703) is adapted to the first clamping hoop (607) and the second clamping hoop (608). The testing mechanism (8) includes a second motor (819), which is connected to a sun gear (804). The sun gear (804) is rotatably connected to a planet gear (803). The planet gear (803) is rotatably connected to a lead screw seat (808) via a worm gear (807). A lead screw nut (810) is fixed on the ball screw (809) of the lead screw seat (808). A testing head (812) is fixed on the lead screw nut (810).

2. The plastic packaging toughness and strength testing device according to claim 1, characterized in that: The frame (4) also includes a motor bracket (401), on which a first motor (501) with its motor shaft facing downwards is fixed. A first pulley (502) is mounted on the motor shaft of the first motor (501). The first pulley (502) is rotatably connected to a second pulley (504) on one side via a transmission belt (503). The second pulley (504) is interference-fitted onto a spline shaft (505). A ball spline (506) is coaxially connected below the second pulley (504). The ball spline (506) is rotatably connected to the spline shaft (505).

3. The plastic packaging toughness and strength testing device according to claim 2, characterized in that: The motor bracket (401) is also provided with a bearing seat (402) on one side, and the splined shaft (505) is rotatably connected to the bearing seat (402).

4. The plastic packaging toughness and strength testing device according to claim 1, characterized in that: The detection mechanism (8) also includes a cylindrical housing (801), a fixed-axis sun gear (804) is provided inside the cylindrical housing (801), a plurality of fixed-axis planet gears (803) are rotatably connected to the side of the sun gear (804), and a planet carrier (802) is rotatably connected to the outside of the planet gears (803).

5. The plastic packaging toughness and strength testing device according to claim 4, characterized in that: Each of the planetary gears (803) is interference-fitted onto a longitudinally positioned first drive shaft (806). A worm gear (805) is coaxially connected above the planetary gear (803). The worm gear (805) is also interference-fitted onto the first drive shaft (806). A worm (807) is rotatably connected to one side of the worm gear (805). The worm (807) is rotatably connected to a lead screw seat (808).

6. The plastic packaging toughness and strength testing device according to claim 1, characterized in that: The lead screw nut (810) is fixed to the end of the ball screw (809). The lead screw nut (810) is provided with a pin hole (811). A detachable detection head (812) is assembled at the pin hole (811) by a positioning pin (815).

7. The plastic packaging toughness and strength testing device according to claim 6, characterized in that: The detection head (812) includes spherical, rectangular, conical, and cylindrical structures. The detection head (812) is connected to a pin bracket (814) via a third arm (813). The detection head (812) is fixed to the pin hole (811) of the lead screw nut (810) via the pin bracket (814) with a positioning pin (815).

8. The plastic packaging toughness and strength testing device according to claim 4, characterized in that: The bottom of the cylindrical housing (801) is provided with a recessed motor mounting position (820). A second motor (819) is fixed on the motor mounting position (820). The motor shaft end of the second motor (819) is press-fitted with a second conical tooth (818). A first conical tooth (817) is rotatably connected to one side of the second conical tooth (818). The first conical tooth (817) is press-fitted to the end of a longitudinally placed second transmission shaft (816). The other end of the second transmission shaft (816) is press-fitted with a sun gear (804).

9. The plastic packaging toughness and strength testing device according to claim 1, characterized in that: The bottom of the linear connecting rod (603) is connected to the first clamping bracket (607) via the first column (604), and the bottom of the annular connecting rod (605) is connected to the second clamping bracket (608) via the second column (606); the hydraulic cylinder (601) is fixed to the side of the frame (4), and the annular connecting rod (605) is arranged around the frame (4); the bottom of the first clamping bracket (607) and the second clamping bracket (608) is provided with annular grooves (610), and the top of the annular bracket (703) is provided with annular protrusions (705) that are adapted to the annular grooves (610).

10. A plastic packaging toughness and strength testing device according to claim 1, characterized in that: The longitudinal slide rail (3) has multiple first threaded holes (302) evenly spaced from top to bottom on its side. The annular hoop (703) has second threaded holes (704) on its side. The second support arm (701) has protruding threaded posts (702) at both ends. The second support arm (701) is connected to the annular hoop (703) and the longitudinal slide rail (3) respectively through the threaded posts (702). The first clamping hoop (607) has a notch (609) on its side. The notch (609) is used to pass through the second support arm (701).

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