A drug packaging tensile strength testing device

Abstract

The present application discloses a drug packaging tensile strength test device, which belongs to the field of drug packaging testing technology. It mainly includes a base; a lower clamping assembly, an upper clamping assembly, and a speed change assembly. The speed change assembly includes: an upper bottom plate, an electric cylinder, and a jacket is installed at the output end of the electric cylinder; a limit plate, a rotating cylinder, a driving gear, a protrusion, and a driven gear are rotatably installed at the bottom of the limit plate, and the driven gear and the driving gear are meshed and connected; a driven gear, a lower bottom plate, and a shaft sleeve is fixedly installed on the lower bottom plate; a speed change gear, the speed change gear is rotatably installed on the shaft sleeve, and the speed change gear and the driven gear are meshed and connected, and at least two sets of limit rods are installed on the speed change gear. A drug packaging tensile strength test device of the present application, through a speed change device, when it is necessary to simulate the actual situation test on the packaging film, the screw rod is changed in speed, thereby changing the moving speed of the upper clamping assembly, so as to achieve the effect of changing the moving speed of the upper clamp.

Description

Technical Field

[0001] The present application relates to the technical field of drug packaging testing, and in particular to a drug packaging tensile strength testing device. Background Art

[0002] The main function of drug packaging is to protect drugs. During the production, transportation, storage and use of drugs, packaging can effectively prevent drugs from being contaminated, deteriorated or damaged. For example, moisture-proof, light-proof, and anti-oxidation packaging methods can extend the shelf life of drugs and ensure that they still maintain their original quality and efficacy during use. During the transportation of drugs, in order to ensure that the drugs are not affected by the external environment, packaging films are needed to package the drugs.

[0003] Before using the packaging film, it is necessary to conduct a tensile strength test to ensure the performance of the packaging film;

[0004] In the prior art, the two ends of the packaging film are usually clamped by upper and lower clamps, and then the upper clamp is moved upward to tighten the packaging film until the packaging film breaks, and the data at this time will be synchronously displayed on the external data panel. The staff can remove the packaging film and evaluate it based on the data;

[0005] However, on a drug packaging production line, when a packaging film is used to package a drug box, the packaging film is unfolded on the production line and continuously transported by a continuous film supply device, and then multiple groups of drug boxes are sequentially transported onto the packaging film, and folding tracks are provided on both sides of the packaging film, so that during the continuous transportation process, the two sides of the packaging film are gradually folded to cover the drugs on the packaging film. When the packaging film drives the drugs to move to the cutting station, the cutting station cuts the packaging film and simultaneously glues the folded parts thereof to package the drug boxes;

[0006] When cutting the packaging film on the packaging film production line, a sudden tensile force will be generated during cutting. However, in the prior art, the upper clamp is only driven at a constant speed to tighten the packaging film until it breaks. This cannot simulate the sudden increase in tensile force when the packaging film is packaged. This makes the test result relatively simple and may not accurately reflect the tensile strength of the packaging film in actual use.

[0007] Therefore, it is necessary to provide a drug packaging tensile strength testing device to solve the above problems.

[0008] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0009] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a drug packaging tensile strength testing device to achieve the effect of changing the moving speed of the upper clamp.

[0010] The technical solution adopted by the present application to solve its technical problem is: a drug packaging tensile strength testing device, including a base; a lower clamping assembly, the lower clamping assembly is arranged on the base; an upper clamping assembly, the upper clamping assembly is arranged on the base, the upper clamping assembly has a support box suitable for installation, the interior of the support box has a screw rod and a rotating shaft; a speed change assembly, the speed change assembly is arranged on the upper clamping assembly, the speed change assembly includes: an upper bottom plate, the upper bottom plate is installed inside the support box; an electric cylinder, the electric cylinder is installed at the bottom of the upper bottom plate, and the output end of the electric cylinder is installed with a clamping sleeve; a limit plate, the limit plate sliding sleeve is arranged on the rotating shaft On the shaft, a rotating drum is rotatably installed at the bottom of the limit plate, and a keyway is opened inside the rotating drum; a driving gear, the driving gear is sleeved on the rotating drum; a convex block, the convex block is arranged on the rotating shaft, and the convex block is located inside the keyway; a driven gear, the driven gear is sleeved on the lead screw, and the driven gear and the driving gear are meshed and connected; a passive gear, the passive gear is sleeved on the lead screw; a lower bottom plate, the lower bottom plate is installed inside the support box, and a shaft sleeve is fixedly installed on the lower bottom plate; a speed gear, the speed gear is rotatably installed on the shaft sleeve, the speed gear and the passive gear are meshed and connected, and at least two sets of limiting rods are installed on the speed gear.

[0011] Furthermore, the screw rod and the rotating shaft are both rotatably mounted on the upper base plate, and the screw rod and the rotating shaft both penetrate the upper base plate.

[0012] Furthermore, the passive gear is located below the driven gear, the jacket has an opening, and part of the limiting disk is located inside the opening.

[0013] Furthermore, the lower clamping assembly includes a lower base fixedly mounted on the top of the base, a lower mounting plate is mounted on the top of the lower base, a lower fixing plate is mounted on the lower mounting plate, a lower clamping portion is arranged on the lower fixing plate, a lower roller is arranged on one side of the lower clamping portion, and the lower roller is mounted on the lower mounting plate.

[0014] Furthermore, the upper clamping assembly includes a support box installed on the base, a motor is installed on the upper bottom plate, and an output end of the motor is connected to the rotating shaft.

[0015] Furthermore, a slider is threadedly installed on the screw rod, a guide rod is installed on the upper base plate, the slider is slidably set on the guide rod, a connecting plate is installed at one end of the slider, the support box has a notch, an elastic member is arranged at the notch, the elastic member has multiple groups of corrugated folds, and the elastic member is connected to the connecting plate.

[0016] Furthermore, a fixing seat is installed on the connecting plate, an upper base is installed at the bottom of the fixing seat, an upper mounting plate is installed at the bottom of the upper base, an upper fixing plate is installed on the upper mounting plate, an upper roller is installed on the upper fixing plate, and an upper clamping portion is provided on one side of the upper roller.

[0017] Furthermore, a folding assembly is arranged on the lower fixed plate, and the folding assembly includes a mounting seat mounted on the lower fixed plate, a first cylinder is mounted on the mounting seat, a square plate is mounted on the output end of the first cylinder, and a support frame is mounted on the square plate.

[0018] Furthermore, a top plate is installed at one end of the support frame away from the square plate, and rotating blocks are installed at both ends of the top plate. One end of the rotating block is exposed from the top plate, and rotating rods are installed at the ends of the two groups of rotating blocks exposed from the top plate. A splint is installed on the two groups of rotating rods to rotate together, and the splint has a folding surface.

[0019] Furthermore, two groups of second cylinders are hinged on the square plate, and push rods are installed at the output ends of the two groups of second cylinders. One end of the push rod away from the second cylinder is hinged to one side of the clamping plate.

[0020] The beneficial effect of the present application is that a pharmaceutical packaging tensile strength testing device provided by the present application, through a speed changing device, makes it possible to change the speed of the screw rod when it is necessary to simulate the actual situation test on the packaging film, thereby changing the moving speed of the upper clamping assembly, thereby achieving the effect of changing the moving speed of the upper clamp.

[0021] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 This is an overall schematic diagram of a drug packaging tensile strength testing device in this application;

[0024] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0025] Figure 3 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0026] Figure 4 for Figure 1 A partial cross-sectional schematic diagram of the whole from another viewing angle;

[0027] Figure 5 for Figure 4 The enlarged schematic diagram of the center C;

[0028] Figure 6 for Figure 1 The overall cross-sectional schematic diagram from another perspective;

[0029] Figure 7 for Figure 6 The enlarged schematic diagram of point D in the middle;

[0030] Figure 8 for Figure 7 The enlarged schematic diagram of point E in the middle;

[0031] Fig. 9 for Figure 7 Another perspective diagram of the whole of the middle part;

[0032] Fig.10 for Fig. 9 The enlarged schematic diagram of F in the middle;

[0033] Among them, the reference numerals in the figure are:

[0034] 1. Base;

[0035] 2. Upper clamping assembly; 21. Support box; 22. Elastic member; 23. Connecting plate; 24. Fixed seat; 25. Upper mounting plate; 251. Upper base; 26. Upper fixing plate; 27. Upper roller; 28. Upper clamping part; 29. ​​Guide rod; 210. Screw rod; 211. Upper bottom plate; 212. Motor; 213. Driven gear; 214. Rotating shaft; 215. Driving gear; 216. Lower bottom plate; 217. Sliding block;

[0036] 3. Lower clamping assembly; 31. Lower fixing plate; 32. Lower roller; 33. Lower mounting plate; 34. Lower base; 35. Lower clamping part; 351. Hydraulic cylinder;

[0037] 4. Folding assembly; 41. Mounting seat; 42. First cylinder; 43. Square plate; 44. Second cylinder; 45. Push rod; 46. Clamp; 461. Folding surface; 47. Top plate; 48. Support frame; 49. Rotating block;

[0038] 5. Speed ​​change assembly; 51. Limit rod; 52. Speed ​​change gear; 53. Bushing; 54. Passive gear; 55. Electric cylinder; 56. Jacket; 57. Limit plate; 58. Rotating drum; 59. Bump. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0041] Embodiment 1: This embodiment specifically describes the basic structure and working principle of the drug packaging tensile strength testing device, specifically:

[0042] like Figure 1-Figure 2 As shown, the present application provides a drug packaging tensile strength testing device, comprising a base 1, on which a lower clamping assembly 3 is provided, and the lower clamping assembly 3 is used to clamp a packaging film;

[0043] The lower clamping assembly 3 includes a lower base 34 fixedly mounted on the top of the base 1, a lower mounting plate 33 fixedly mounted on the lower base 34, and a lower clamping portion 35 fixedly mounted on the lower mounting plate 33;

[0044] The lower clamping part 35 may be a clamping mechanism driven by a hydraulic cylinder 351, such as Figure 2 As shown, a clamping seat is fixedly mounted on the lower mounting plate 33, a hydraulic cylinder 351 is fixedly mounted on one side of the clamping seat, and a clamping plate 46 is fixedly mounted on the output end of the hydraulic cylinder 351, so that the clamping plate 46 can move under the drive of the hydraulic cylinder 351;

[0045] At the same time, a groove is provided on the clamping seat, and the clamping plate 46 is slidably arranged inside the groove, and a certain gap is left between the side of the clamping plate 46 away from the hydraulic cylinder 351 and the groove. For the convenience of description, the gap is defined as a placement area. When clamping, one end of the packaging film is placed in the placement area, and driven by the hydraulic cylinder 351, the clamping plate 46 can approach the groove to clamp one end of the packaging film.

[0046] A lower roller 32 is provided on one side of the lower clamping portion 35, and the lower roller 32 is mounted on a lower mounting plate 33, so that the remaining portion of the packaging film can pass through the lower surface of the lower roller 32 and be guided out, and then the guided portion can be placed in subsequent equipment;

[0047] An upper clamping assembly 2 is provided on the base 1, and the upper clamping assembly 2 is used to clamp the packaging film;

[0048] like Figure 4 and Figure 6-Figure 8As shown, the upper clamping assembly 2 includes a support box 21 fixedly mounted on the base 1, the support box 21 is formed by splicing a plurality of sets of steel plates, and an upper base plate 211 is fixedly mounted at the lower part of the support box 21, a motor 212 is fixedly mounted on the upper base plate 211, a rotating shaft 214 is fixedly mounted on the output end of the motor 212, a driving gear 215 is fixedly sleeved on the rotating shaft 214, and a screw rod 210 is rotatably mounted on the upper base plate 211, the bottom of the screw rod 210 is exposed from the upper base plate 211, and a driven gear 213 is fixedly sleeved on the bottom of the screw rod 210, and the driven gear 213 is meshingly connected with the driving gear 215;

[0049] Then, driven by the motor 212, the driving gear 215 is driven to rotate, thereby driving the driven gear 213 to rotate, and synchronously driving the screw rod 210 to rotate;

[0050] Continue to refer Figure 6 A slider 217 is threadedly mounted on the screw rod 210, and a guide rod 29 is fixedly mounted on the upper base plate 211. The slider 217 is slidably mounted on the guide rod 29, so that when the screw rod 210 rotates, the slider 217 is driven to move up and down along the axis direction of the guide rod 29, and the moving direction is fixed under the restriction of the guide rod 29;

[0051] like Figure 2 and Figure 4 As shown, a connecting plate 23 is fixedly installed at one end of the slider 217, and a fixing seat 24 is fixedly installed on the connecting plate 23, an upper base 251 is fixedly installed at the bottom of the fixing seat 24, and an upper mounting plate 25 is fixedly installed at the bottom of the upper base 251, and an upper fixing plate 26 is installed on the upper mounting plate 25, and then when the slider 217 moves, the fixing seat 24 is driven to move through the connecting plate 23, thereby driving the upper base 251 and the upper mounting plate 25 to move, and synchronously driving the upper fixing plate 26 to move;

[0052] An upper roller 27 is mounted on the upper fixed plate 26, and an upper clamping portion 28 is disposed on one side of the upper roller 27. The structure and principle of the upper clamping portion 28 are the same as those of the lower clamping portion, and the specific structure and principle are not described in detail here, so as to clamp the other end of the packaging film, so that the packaging film guided out by the lower clamping assembly 3 can pass through the upper surface of the upper roller 27 and enter the placement area of ​​the upper clamping assembly 2. At this time, the hydraulic cylinder 351 of the upper clamping assembly 2 is started to clamp the other end of the packaging film.

[0053] It should be noted that the upper clamping portion 28 is located below one side of the upper roller 27, so that the height of the upper clamping portion 28 is lower than the upper roller 27, so that the packaging film can be attached to the upper surface of the upper roller 27 when passing through the upper surface of the upper roller 27;

[0054] It should be noted that the support box 21 has a notch suitable for the connection plate 23 to move, and an elastic member 22 is provided at the notch. The elastic member 22 has multiple groups of corrugated folds so that the elastic member 22 can be contracted or expanded, and the elastic member 22 is connected to one side of the connection plate 23, and when the connection plate 23 moves, the elastic member 22 is driven to move, so that it is expanded or contracted, and when the upper clamping portion 28 breaks the packaging film, the impact force generated is buffered;

[0055] To sum up, when testing the packaging film, one end of the packaging film is clamped by the lower clamping assembly 3, and the remaining part of the packaging film is passed through the lower surface of the lower roller 32, and then the other end of the packaging film is passed through the upper surface of the upper roller 27 and clamped by the upper clamping assembly 2, and then the motor 212 is started, and the screw rod 210 is driven to rotate through the cooperation of the driving gear 215 and the driven gear 213, thereby driving the slider 217 to move upward, and driving the fixed seat 24 to move through the connecting plate 23, thereby driving the upper base 251 and the upper mounting plate 25 to move, and synchronously driving the upper fixed plate 26 to move, so as to drive the upper clamping part 28 to move, so as to tighten the packaging film until it breaks, and the data at this time will be synchronously displayed on the external data panel, and then the staff can take out the broken packaging film.

[0056] Embodiment 2:

[0057] On the packaging production line of medicines, when the packaging film is used to pack the medicine box, the packaging film is unfolded on the production line and continuously transported by a continuous film supply device, and then multiple groups of medicine boxes are sequentially transported onto the packaging film, and folding tracks are provided on both sides of the packaging film, so that the packaging film is gradually folded on both sides during the continuous transportation process to cover the medicine on the packaging film. When the packaging film drives the medicine to move to the cutting station, the cutting station cuts the packaging film and simultaneously glues the folded part thereof to pack the medicine box;

[0058] When the packaging film is in a folded state, the contact area between the packaging film and the continuous film supply device is reduced, which leads to stress concentration or uneven tension at the folded part of the packaging film, and the folded part of the film may be more easily damaged;

[0059] Although the above embodiment can realize the tensile strength test of the packaging film, the test effect is relatively simple and cannot simulate the packaging film being in a folded state for testing;

[0060] In order to solve this problem, a folding assembly 4 is provided on the lower clamping assembly 3, and the folding assembly 4 is used to fold the side edge of the packaging film;

[0061] like Figure 3-Figure 5As shown, the hemming assembly 4 includes a mounting seat 41 fixedly mounted on the lower fixing plate 31, a first cylinder 42 is fixedly mounted on the mounting seat 41, a square plate 43 is fixedly mounted on the output end of the first cylinder 42, and a support frame 48 is fixedly mounted on the square plate 43, so that the square plate 43 is driven to extend or retract under the drive of the first cylinder 42, and the support frame 48 is driven to extend or retract synchronously;

[0062] The support frame 48 is welded by multiple sets of steel frames, and a top plate 47 is fixedly installed at one end of the support frame 48 away from the square plate 43. Rotating blocks 49 are fixedly installed at both ends of the top plate 47, and one end of the rotating block 49 is exposed from the top plate 47. Rotating rods (not shown in the figure) are fixedly installed at the ends of the two sets of rotating blocks 49 exposed from the top plate 47.

[0063] A clamping plate 46 is installed between the two groups of rotating rods for common rotation. The clamping plate 46 has a folding surface 461, which is flush with the plane of the top plate 47. Two groups of second cylinders 44 are hinged on the square plate 43. Push rods 45 are fixedly installed on the output ends of the two groups of second cylinders 44. One end of the push rod 45 away from the second cylinder 44 is hinged to one side of the clamping plate 46. Then, driven by the second cylinder 44, the clamping plate 46 is driven to rotate along the axis direction of the rotating rod, so that the folding surface 461 of the clamping plate 46 gradually approaches the top plate 47.

[0064] To sum up, when it is necessary to fold the packaging film, after the upper clamping assembly 2 tightens the packaging film, the upper clamping assembly 2 stops, and the first cylinder 42 is started to drive the square plate 43 to extend, thereby driving the support frame 48 to extend, and then driving the top plate 47 to extend until the top plate 47 abuts against one side of the packaging film. At this time, the folding surface 461 of the clamping plate 46 abuts against the outer side of the packaging film, and the second cylinder 44 is started. The second cylinder 44 extends, thereby driving the top plate 47 to be placed and rotated along the axis of the rotating rod, so that the long side direction of the clamping plate 46 gradually becomes perpendicular to the top plate 47, so as to fold the side edge of the packaging film. At this time, the contact area between the packaging film and the lower roller 32 becomes smaller, and then the upper clamping assembly 2 is started again to continuously stretch the packaging film until it breaks, and the data is synchronously displayed on the external data panel, and then the staff can take out the broken packaging film;

[0065] It should be noted that the folding assembly 4 can be set into two groups (not shown in the figure), thereby supporting the outer edges of both sides of the packaging film and folding the outer edges of both sides, so as to further simulate the actual situation as a better solution of this embodiment.

[0066] Embodiment three:

[0067] On a packaging film production line, when the packaging film is cut, a sudden tensile force will be generated during cutting. Although the above embodiment can realize the folding operation of the packaging film to make it in a folded state for testing, it cannot simulate the situation that the tensile force suddenly increases due to cutting the packaging film when the packaging film is packaged. This makes the test effect relatively simple and may not accurately reflect the tensile strength of the packaging film in actual use.

[0068] In order to solve this problem, in this embodiment, the driving gear 215 fixedly sleeved on the rotating shaft 214 is changed to a sliding arrangement, and a speed change assembly 5 is provided on the upper clamping assembly 2, and the speed change assembly 5 is used to change the rotation speed of the screw rod 210, specifically:

[0069] like Figure 7-Figure 10 As shown, the speed change assembly 5 includes an electric cylinder 55 fixedly mounted on the bottom of the upper base plate 211, a jacket 56 is fixedly mounted on the output end of the electric cylinder 55, the jacket 56 has an opening, and a limit plate 57 is arranged inside the opening, the limit plate 57 is slidably arranged on the rotating shaft 214, and a rotating drum 58 is rotatably mounted on the bottom of the limit plate 57, and the rotating drum 58 is connected to the driving gear 215;

[0070] So that under the drive of the electric cylinder 55, the jacket 56 and the cylinder limit plate 57 drive the rotating cylinder 58 to move along the axis of the rotating shaft 214, and under the drive of the rotating shaft 214, the driving gear 215 is synchronously driven to move;

[0071] Meanwhile, a protrusion 59 is provided on the rotating shaft 214, and a keyway (not shown in the figure) adapted to the protrusion 59 is provided inside the rotating drum 58, so that when the rotating shaft 214 rotates, the rotating drum 58 is driven to rotate by the cooperation of the protrusion 59 and the keyway, thereby driving the driving gear 215 to rotate, so as to ensure the normal operation of the driving gear 215;

[0072] It should be noted that one end of the protrusion 59 is close to the speed change gear 52, so that when the driving gear 215 moves downward, the rotating drum 58 can continue to rotate to synchronously drive the driving gear 215 to rotate;

[0073] A passive gear 54 is fixedly sleeved at the bottom of the screw rod 210, and the passive gear 54 is located below the driven gear 213. A lower bottom plate 216 is provided below the upper bottom plate 211, and the lower bottom plate 216 is fixedly connected to the support box 21, and a shaft sleeve 53 is fixedly installed on the lower bottom plate 216, and the shaft sleeve 53 is located below the rotating shaft 214 and aligned with its axis. A speed change gear 52 is rotatably installed on the shaft sleeve 53, and the speed change gear 52 is meshed and connected with the passive gear 54, and a plurality of limit rods 51 are fixedly installed on the top of the speed change gear 52;

[0074] When the driving gear 215 drives the screw rod 210 to rotate through the driven gear 213, the driven gear 54 is synchronously driven to rotate, thereby driving the speed change gear 52 to rotate on the shaft sleeve 53. In the initial state, the driving gear 215 and the driven gear 213 are meshed, and the driving gear 215 serves as a power source;

[0075] It should be noted that the size of the driven gear 213 is larger than the driving gear 215. When the driving gear 215 is meshed with the driven gear 213, the transmission ratio is small at this time. For the convenience of description, it is defined as a small transmission ratio. The size of the speed change gear 52 is larger than the driving gear 215, and the size of the driven gear 54 is the same as that of the driven gear 54. At this time, the transmission ratio between the speed change gear 52 and the driven gear 54 is large. For the convenience of description, it is defined as a large transmission ratio.

[0076] When speed change is required, the electric cylinder 55 drives the jacket 56 to move downward, thereby driving the limit plate 57 to move downward, driving the drum 58 to move downward, and synchronously driving the driving gear 215 to move downward. When the driving gear 215 is separated from the driven gear 213, the driven gear 213 stops rotating and drives the screw rod 210 to stop rotating, thereby causing the driven gear 54 and the speed change gear 52 to stop rotating. At this time, the driving gear 215 continues to move downward;

[0077] It should be noted that the motor 212 always drives the rotating shaft 214 to rotate at a low speed, and then when the driving gear 215 is separated from the driven gear 213, the driving gear 215 can still rotate at a low speed, so that it can adapt to the position of the limiting rod 51 for engagement, that is, multiple groups of limiting rods 51 are inserted between the teeth of the driving gear 215, thereby limiting the driving gear 215, avoiding mechanical interference caused by the uncertainty of the positions of the multiple groups of limiting rods 51;

[0078] At this time, the driving gear 215 drives the speed gear 52 to rotate through the limiting rod 51. At this time, the speed gear 52 serves as a power source, and the small transmission ratio becomes a large transmission ratio, so that the screw rod 210 accelerates the transmission, so that the moving speed of the slider 217 on the screw rod 210 is accelerated, thereby driving the upper clamping assembly 2 to quickly tighten the packaging film;

[0079] To sum up, when changing speed, the electric cylinder 55 is started to drive the jacket 56 to move downward, and the driving gear 215 is driven to move downward through the rotating cylinder 58 until the multiple groups of limit rods 51 on the speed change gear 52 are inserted between the teeth of the driving gear 215. At this time, the driving gear 215 drives the speed change gear 52 to rotate through the limit rods 51, thereby driving the passive gear 54 to rotate. At this time, the small transmission ratio becomes a large transmission ratio, and the rotation speed of the screw rod 210 increases, thereby driving the slider 217 to move quickly on the screw rod 210, so that the upper clamping assembly 2 moves quickly upward. At this time, the packaging film is tightened from uniform speed to rapid speed to simulate the situation where the packaging film is suddenly stressed.

[0080] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drug packaging tensile strength testing device, characterized in that: include: Base (1); A lower clamping assembly (3), wherein the lower clamping assembly (3) is arranged on the base (1); An upper clamping assembly (2), the upper clamping assembly (2) being arranged on the base (1), the upper clamping assembly (2) having a support box (21) suitable for installation, the support box (21) having a screw rod (210) and a rotating shaft (214) inside; A speed change assembly (5), the speed change assembly (5) being arranged on the upper clamping assembly (2), the speed change assembly (5) comprising: An upper base plate (211), the upper base plate (211) being installed inside the support box (21); An electric cylinder (55), the electric cylinder (55) being mounted on the bottom of the upper base plate (211), and a jacket (56) being mounted on the output end of the electric cylinder (55); a limiting plate (57), the limiting plate (57) being slidably sleeved on the rotating shaft (214), a rotating cylinder (58) being rotatably mounted on the bottom of the limiting plate (57), and a key groove being provided inside the rotating cylinder (58); A driving gear (215), wherein the driving gear (215) is sleeved on the rotating drum (58); A convex block (59), the convex block (59) being arranged on the rotating shaft (214), and the convex block (59) being located inside the key slot; A driven gear (213), wherein the driven gear (213) is sleeved on the screw rod (210), and the driven gear (213) is meshingly connected with the driving gear (215); A passive gear (54), wherein the passive gear (54) is sleeved on the lead screw (210); A lower bottom plate (216), the lower bottom plate (216) being installed inside the support box (21), and a shaft sleeve (53) being fixedly installed on the lower bottom plate (216); A speed change gear (52), the speed change gear (52) being rotatably mounted on the shaft sleeve (53), the speed change gear (52) being meshingly connected with the driven gear (54), and at least two sets of limiting rods (51) being mounted on the speed change gear (52); The lower clamping assembly (3) comprises a lower base (34) fixedly mounted on the top of the base (1), a lower mounting plate (33) being mounted on the top of the lower base (34), and a lower fixing plate (31) being mounted on the lower mounting plate (33); The lower fixed plate (31) is provided with a folding assembly (4), the folding assembly (4) comprising a mounting seat (41) mounted on the lower fixed plate (31), a first cylinder (42) being mounted on the mounting seat (41), a square plate (43) being mounted at the output end of the first cylinder (42), and a support frame (48) being mounted on the square plate (43); A top plate (47) is mounted on one end of the support frame (48) away from the square plate (43), rotating blocks (49) are mounted on both ends of the top plate (47), one end of the rotating block (49) is exposed from the top plate (47), rotating rods are mounted on the ends of the two groups of rotating blocks (49) exposed from the top plate (47), and clamping plates (46) are mounted on the two groups of rotating rods for common rotation, and the clamping plates (46) have a folding surface (461); Two groups of second cylinders (44) are hingedly connected to the square plate (43), and push rods (45) are installed at the output ends of the two groups of second cylinders (44), and one end of the push rod (45) away from the second cylinder (44) is hingedly connected to one side of the clamping plate (46); Then, driven by the second cylinder (44), the clamping plate (46) is driven to rotate along the axis direction of the rotating rod, so that the folding surface (461) of the clamping plate (46) gradually approaches the top plate (47).

2. A drug packaging tensile strength testing device according to claim 1, characterized in that: The screw rod (210) and the rotating shaft (214) are both rotatably mounted on the upper base plate (211), and the screw rod (210) and the rotating shaft (214) both penetrate the upper base plate (211).

3. A drug packaging tensile strength testing device according to claim 1, characterized in that: The passive gear (54) is located below the driven gear (213), the jacket (56) has an opening, and a portion of the limiting plate (57) is located inside the opening.

4. A drug packaging tensile strength testing device according to claim 1, characterized in that: A lower clamping portion (35) is provided on the lower fixing plate (31), a lower roller (32) is provided on one side of the lower clamping portion (35), and the lower roller (32) is mounted on the lower mounting plate (33).

5. The drug packaging tensile strength testing device according to claim 1, characterized in that: The upper clamping assembly (2) comprises a support box (21) mounted on the base (1), a motor (212) is mounted on the upper bottom plate (211), and an output end of the motor (212) is connected to the rotating shaft (214).

6. A drug packaging tensile strength testing device according to claim 5, characterized in that: A slider (217) is threadedly mounted on the screw rod (210), a guide rod (29) is mounted on the upper base plate (211), the slider (217) is slidably mounted on the guide rod (29), a connecting plate (23) is mounted on one end of the slider (217), the support box (21) has a notch, an elastic member (22) is disposed at the notch, the elastic member (22) has a plurality of groups of corrugated folds, and the elastic member (22) is connected to the connecting plate (23).

7. A drug packaging tensile strength testing device according to claim 6, characterized in that: A fixing seat (24) is mounted on the connecting plate (23); an upper base (251) is mounted on the bottom of the fixing seat (24); an upper mounting plate (25) is mounted on the bottom of the upper base (251); an upper fixing plate (26) is mounted on the upper mounting plate (25); an upper roller (27) is mounted on the upper fixing plate (26); and an upper clamping portion (28) is provided on one side of the upper roller (27).

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