Automatic detection device for plastic bottle caps

Abstract

The invention relates to the field of plastic product quality detection, in particular to a plastic bottle cap automatic detection device which comprises a detection table and an extrusion mechanism, a torque turntable is rotatably arranged on the detection table, a driving rotating shaft capable of rotating and moving up and down is arranged on the upper portion of the detection table through a driving mechanism, and a mounting disc is fixedly mounted on the lower portion of the driving rotating shaft. And the mounting disc and the torque turntable are jointly provided with a detection mechanism for detecting the torque of the bottle cap. According to the invention, the connecting assembly is adopted to enable the extrusion wheel to extrude the bottle body, and a high-pressure state is formed in the bottle body by reducing the internal space of the bottle body, so that the torque test in the bottle under two scenes of high pressure and normal pressure is realized. According to the bottle cap clamping device, the multiple cap clamping rollers are adopted for clamping a bottle cap, the abutting force of the cap clamping rollers on the bottle cap is flexibly adjusted through the driving assembly, the number of free rotation of the cap clamping rollers is changed through the roller locking assembly, and therefore the number of clamping points of the bottle cap is adjusted, and the complex situation when the bottle cap is screwed by a human hand is simulated.

Description

Technical Field

[0001] The present invention relates to the field of quality inspection of plastic products, and specifically to an automatic detection device for plastic bottle caps. Background Art

[0002] The opening and closing performance of plastic bottle caps is an important indicator of the quality of bottle caps. Currently, the performance of the opening and closing of bottle caps is usually detected by measuring the torque required to open and close the bottle caps. Torque detection is a key link in balancing sealing performance, user experience, and production efficiency, directly affecting product safety, compliance, and market reputation.

[0003] Currently, an automatic bottle cap torque tester is mainly used to detect the torque required to open and close the bottle cap. During the detection, the bottle body is fixed at the lower part of the automatic bottle cap torque tester, and the bottle cap is fixed at the upper part of the automatic bottle cap torque tester. By rotating the bottle cap back and forth by the automatic bottle cap torque tester, the bottle cap is driven to open and close repeatedly on the bottle body. At the same time, the torque is detected and recorded by the automatic bottle cap torque tester, and then the recorded torque value is compared with the standard value to determine whether the torque test of the bottle cap is qualified.

[0004] However, the change in the pressure inside the bottle will affect the torque detection result of the bottle cap. When the existing automatic bottle cap torque tester detects the torque of the bottle cap, it cannot adjust the pressure inside the bottle body, so that the test environment cannot cover the two scenarios of high pressure and normal pressure inside the bottle, resulting in a relatively one-sided detection result and the accuracy needs to be improved. In addition, the existing automatic bottle cap torque tester cannot flexibly adjust the clamping force on the bottle cap and the number of clamping points, and cannot simulate the complex situation when the human hand twists the bottle cap, which further makes the detection process deviate from the actual application scenario and will also affect the accuracy of the detection result. Summary of the Invention

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic detection device for plastic bottle caps, including a detection table, a torque turntable is rotatably arranged on the detection table, a driving shaft that can rotate and move up and down is arranged on the upper part of the detection table through a driving mechanism, an installation disc is fixedly installed at the lower part of the driving shaft, a detection mechanism for detecting the torque of the bottle cap is jointly arranged on the installation disc and the torque turntable, and the detection device further includes an extrusion mechanism for extruding the bottle body.

[0006] The detection mechanism includes sliding members arranged at equal intervals along the circumference of the installation disc, the sliding members are slidably connected to the installation disc along the radial direction of the installation disc, the lower part of the sliding members is in a rod-shaped structure, a clamping cap roller is rotatably arranged on the outer side of the rod-shaped structure of the sliding members, a locking roller assembly for locking the rotation angle of the clamping cap roller is arranged on the sliding members, and the detection mechanism further includes a driving component for driving the sliding members to move synchronously.

[0007] The detection mechanism further includes four bottle clamping rollers arranged at equal intervals on the torque turntable through a moving component. One side of the bottle clamping roller is a planar structure, and an adjusting component for clamping a square bottle is arranged on the bottle clamping roller.

[0008] The extrusion mechanism includes a sliding ring member slid up and down between the mounting disc and the middle part of the torque turntable through a centering component. Four wheel frame blocks are arranged at equal intervals along the circumference of the sliding ring member through a connecting component on the sliding ring member. An extrusion wheel is rotatably arranged at one end of the wheel frame block close to the axis of the sliding ring member. Adjacent two wheel frame blocks are hinged through a connecting plate.

[0009] Preferably, the locking roller assembly includes a first stud threadedly connected to the lower part of the sliding member. A connecting locking member that is rotatably arranged on the outer side of the first stud and is slidably connected to the sliding member up and down is provided on the connecting locking member. A locking plug for inserting into the corresponding cap clamping roller is fixedly installed.

[0010] Preferably, the driving component includes a convex rod fixedly installed on the upper part of the sliding member. A linkage disc plate is rotatably arranged on the upper part of the mounting disc. A spiral groove corresponding to the convex rod one by one is arranged at equal intervals along the circumference of the linkage disc plate. The convex rod slides inside the spiral groove at the corresponding position. A first electric push rod is jointly hinged between the linkage disc plate and the driving rotating shaft.

[0011] Preferably, the moving component includes moving blocks arranged at equal intervals along the circumference of the torque turntable inside it. A swing block is rotatably arranged inside the moving block. An adjusting insertion rod is connected inside the swing block. The upper part of the adjusting insertion rod is slidably connected to the corresponding bottle clamping roller up and down. On the torque turntable, third studs threadedly connected to the corresponding moving blocks are rotatably arranged at equal intervals along the circumference. Adjacent two third studs are connected and driven by a bevel gear connection method.

[0012] Preferably, the lower part of the swing block is a semi-circular arc structure. An incomplete gear in a semi-circular ring shape is fixedly installed on the lower part of the swing block. A rack meshing with the incomplete gear is slidably connected inside the moving block. A driven plate is fixedly installed on one side of the rack close to the axis of the torque turntable. The upper side of the driven plate is located between the upper side of the torque turntable and the lower side of the bottle clamping roller.

[0013] Preferably, four limiting support plates are fixedly installed at equal intervals along the circumference on the outer side of the middle part of the adjusting insertion rod. A cross groove for inserting the limiting support plates is arranged on the swing block.

[0014] Preferably, the adjusting component includes two symmetrically arranged extending abutting plates slidably arranged on the planar structure of the bottle clamping roller. A triangular plate is slid up and down in the middle of the planar structure of the bottle clamping roller. The two inclined surfaces of the triangular plate are respectively slidably connected to the two corresponding extending abutting plates.

[0015] Preferably, a second stud is rotatably connected inside the bottle clamping roller. The second stud is threadedly connected to the adjusting insertion rod at the corresponding position, and the triangular plate is fixedly connected to the adjusting insertion rod at the corresponding position.

[0016] Preferably, the centering assembly includes a linkage ring member rotatably arranged outside the mounting disc. Two guide columns slidably connected to the linkage ring member up and down are fixedly installed outside the torque turntable through a support plate. The sliding ring members are slidably connected to the middle of the guide columns up and down together. A synchronous connecting plate is rotatably arranged in the middle of the right side of the sliding ring member. Both ends of the synchronous connecting plate are respectively hinged to the support plate of the torque turntable and the linkage ring member through hinge plates.

[0017] Preferably, the connecting assembly includes a rotating ring plate rotatably arranged on the sliding ring member. The wheel frame block is slidably connected to the rotating ring plate along the radial direction of the rotating ring plate. An actuating motor that drives the rotating ring plate to rotate by means of gear transmission is fixedly installed at the rear of the sliding ring member. A second electric push rod is arranged between the rotating ring plate and one of the wheel frame blocks.

[0018] The beneficial effects of the present invention are as follows: First, the present invention uses a connecting assembly to extrude the bottle body by the extrusion wheel, and forms a high-pressure state inside the bottle body by reducing the internal space of the bottle body, so as to realize the torque test under two scenarios of high pressure and normal pressure inside the bottle, improving the comprehensiveness of the detection results.

[0019] Second, the present invention uses a connecting plate to hinge two adjacent wheel frame blocks, so that two adjacent wheel frame blocks move alternately and two opposite wheel frame blocks move symmetrically, so that the wheel frame blocks can drive the extrusion wheel to extrude the square bottle body in two directions. Moreover, the connecting assembly can also drive the extrusion wheel to perform circumferential circumferential extrusion on the cylindrical bottle body by rotating the wheel frame blocks. Therefore, through multi-directional extrusion tests, the complex mechanical environment of the bottle cap during transportation, storage and use can be more realistically simulated, further improving the comprehensiveness of the detection results.

[0020] Third, the present invention uses a plurality of bottle cap clamping rollers to clamp the bottle cap, flexibly adjusts the abutting force of the bottle cap clamping rollers on the bottle cap through the driving assembly, and changes the number of freely rotating bottle cap clamping rollers through the locking roller assembly, so as to adjust the number of clamping points on the bottle cap, thus simulating the complex situation when the human hand twists the bottle cap, making the detection process more in line with the actual application scenario, and further improving the comprehensiveness of the detection results.

[0021] Fourth, the present invention uses a moving assembly to drive the bottle clamping roller to stably clamp the bottle body, and pre-inclines the bottle clamping roller, so that when the bottle body is deformed by extrusion, the inclined bottle clamping roller compensates for the deformation amount at the bottom of the bottle body, making the clamping of the bottle body by the bottle clamping roller more stable. Moreover, through the centering assembly, the extrusion wheel can automatically extrude the middle part of the bottle body, further increasing the stability of clamping the bottle body and ensuring the accuracy of torque detection.

[0022] 5. When the clamping bottle roller of the present invention clamps a square bottle by using the adjusting assembly, the abutting area against the square bottle can be increased, further preventing the square bottle from rotating relative to the torque turntable, thereby increasing the clamping stability of the clamping bottle roller to the square bottle and improving the overall applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the structures of the torque turntable, the moving assembly, the clamping bottle roller and the adjusting assembly in the present invention.

[0026] Figure 3 It is a partial cross-sectional view of the moving assembly, the clamping bottle roller and the adjusting assembly in the present invention.

[0027] Figure 4 It is a separated cross-sectional view of the swing block, the adjusting insertion rod, the clamping bottle roller and the adjusting assembly in the present invention.

[0028] Figure 5 It is a partial cross-sectional view of the driving rotating shaft, the mounting disc, the sliding member, the clamping cover roller, the driving assembly and the locking roller assembly in the present invention.

[0029] Figure 6 It is a schematic diagram of the structures of the driving rotating shaft, the mounting disc and the driving assembly in the present invention.

[0030] Figure 7 It is a schematic diagram of the structures of the torque turntable and the extrusion mechanism in the present invention.

[0031] Figure 8 It is a state change diagram of the extrusion wheel squeezing the bottle body from left and right to front and back in the present invention.

[0032] In the figure: 1, detection table; 2, torque turntable; 3, driving mechanism; 4, driving rotating shaft; 5, mounting disc; 6, detection mechanism; 7, extrusion mechanism; 61, sliding member; 62, clamping cover roller; 63, locking roller assembly; 64, driving assembly; 65, moving assembly; 66, bottle clamping roller; 67, adjusting assembly; 71, centering assembly; 72, sliding ring member; 73, connecting assembly; 74, wheel frame block; 75, extrusion wheel; 76, connecting plate; 631, first stud; 632, connecting locking member; 633, locking plug post; 641, protruding rod; 642, linkage disc plate; 643, spiral groove; 644, first electric push rod; 651, moving block; 652, swinging block; 653, adjusting plug rod; 654, third stud; 671, extending abutting plate; 672, triangular plate; 673, second stud; 711, linkage ring member; 712, guiding column; 713, synchronous connecting plate; 714, hinged plate; 731, rotating ring plate; 732, actuating motor; 733, second electric push rod; 6521, incomplete gear; 6522, rack; 6523, driven plate; 6531, limiting support plate; 6532, cross groove. Detailed implementation mode

[0033] The embodiments of the present invention will be described in detail below. The following described embodiments are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention. For those not specified in the embodiments in terms of specific technologies or conditions, they shall be carried out according to the technologies or conditions described in the literature in the field or according to the product instructions.

[0034] Refer to Figure 1 and Figure 5 , an automatic plastic bottle cap detection device, including a detection table 1 and an extrusion mechanism 7 for extruding the bottle body. A torque turntable 2 is rotatably arranged on the detection table 1. A driving rotating shaft 4 that can rotate and move up and down is arranged on the upper part of the detection table 1 through a driving mechanism 3. The lower part of the driving rotating shaft 4 is fixedly installed with a mounting disc 5. A detection mechanism 6 for torque detection of the bottle cap is jointly arranged on the mounting disc 5 and the torque turntable 2. The detection device also includes an extrusion mechanism 7 for extruding the bottle body.

[0035] When it is necessary to detect a plastic bottle cap, first place the bottle body on the detection table 1, and clamp and fix the bottle body and the bottle cap through the detection mechanism 6, so that the bottle body and the torque turntable 2 are locked into a whole, and the bottle cap and the mounting disc 5 are locked into a whole.

[0036] Then, according to the detection requirements, the bottle body is extruded by the extrusion mechanism 7, so that the pressure inside the bottle body increases and the bottle body deforms. Then, the driving mechanism 3 rotates the driving shaft 4, so that the driving shaft 4 twists the bottle cap through the detection mechanism 6. At the same time, the torque received by the bottle body is detected by the torque turntable 2. Then, according to the detection requirements, the number of clamping points and the clamping force on the bottle cap are changed through the detection mechanism 6, and then the bottle cap is twisted and detected again.

[0037] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The detection mechanism 6 includes a moving component 65. The moving component 65 includes four moving blocks 651 arranged equidistantly along the circumferential direction of the torque turntable 2 inside it. Inside the moving block 651, a swing block 652 is rotatably arranged through a torsion spring rod. Inside the swing block 652, an adjusting insertion rod 653 is connected. The upper part of the adjusting insertion rod 653 is slidably connected with a bottle clamping roller 66. One side of the bottle clamping roller 66 is a flat structure. Four limiting support plates 6531 are fixedly installed on the outer side of the middle part of the adjusting insertion rod 653 at equal intervals along its circumferential direction. A cross slot 6532 for the limiting support plates 6531 to insert is opened on the swing block 652.

[0038] When it is necessary to clamp and fix the bottle body on the torque turntable 2, the operator places the bottle body on the upper side of the middle part of the torque turntable 2, and then adjusts the orientation of the flat structure of the bottle clamping roller 66 according to the shape of the bottle. When the bottle is a cylindrical structure, the cylindrical surface of the bottle clamping roller 66 faces the axis position of the torque turntable 2, so as to clamp the cylindrical bottle body through the cylindrical surface of the bottle clamping roller 66.

[0039] When the bottle is a square structure, the operator manually pulls up the adjusting insertion rod 653, so that the limiting support plates 6531 on the adjusting insertion rod 653 completely move above the swing block 652. Then, the operator manually rotates the adjusting insertion rod 653 by half a turn, so that the adjusting insertion rod 653 drives the bottle clamping roller 66 to rotate synchronously, so that one side of the flat structure of the bottle clamping roller 66 faces the axis position of the torque turntable 2, and further makes the flat structure of the bottle clamping roller 66 abut and clamp the flat side of the square bottle.

[0040] Then, the operator moves the adjusting insertion rod 653 downward, so that the limiting support plates 6531 on the adjusting insertion rod 653 are inserted into the cross slot 6532 inside the swing block 652 again, so as to connect the adjusting insertion rod 653 and the swing block 652 into a whole, and prevent the adjusting insertion rod 653 from rotating without external force.

[0041] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, an adjusting component 67 adapted to clamp a square bottle is provided on the bottle clamping roller 66. The adjusting component 67 includes two symmetrically arranged extending abutting plates 671 slidably disposed on the planar structure of the bottle clamping roller 66. A triangular plate 672 is slidably disposed up and down in the middle of the planar structure of the bottle clamping roller 66. The two inclined surfaces of the triangular plate 672 are respectively slidably connected to the two extending abutting plates 671 at corresponding positions. A second screw 673 is rotatably connected inside the bottle clamping roller 66. The second screw 673 is threadedly connected to the adjusting insertion rod 653 at the corresponding position. The triangular plate 672 is fixedly connected to the adjusting insertion rod 653 at the corresponding position.

[0042] When it is necessary to clamp a square bottle, the operator manually rotates the second screw 673, so that the second screw 673 drives the bottle clamping roller 66 to move upward relative to the adjusting insertion rod 653. The bottle clamping roller 66 drives the two extending abutting plates 671 thereon to move upward relative to the triangular plate 672 synchronously, so that the triangular plate 672 pushes the two extending abutting plates 671 away from each other, and further enables the two extending abutting plates 671 to expand the clamping and abutting range of the bottle clamping roller 66 on the square bottle, increasing the clamping stability of the square bottle. It should be noted that the center of gravity of the overall structure of the bottle clamping roller 66 and the adjusting component 67 is distributed on the axis of the adjusting insertion rod 653, and the swing blocks 652 are symmetrically distributed about the axis of the adjusting insertion rod 653. Such a setting is to keep the overall structure of the bottle clamping roller 66 and the adjusting component 67 in a basically vertical state before squeezing the bottle body.

[0043] Refer to Figure 2 、 Figure 3 and Figure 4 , three-way screws 654 threadedly connected to the corresponding moving blocks 651 are rotatably arranged at equal intervals along the circumference of the torque turntable 2. Two adjacent three-way screws 654 are connected and driven by bevel gears. The lower part of the swing block 652 has a semi-circular arc structure. An incomplete gear 6521 in the shape of a semi-circular ring is fixedly installed on the lower part of the swing block 652. A rack 6522 meshing with the incomplete gear 6521 is slidably connected inside the moving block 651. A driven plate 6523 is fixedly installed on one side of the rack 6522 close to the axis of the torque turntable 2. The upper side of the driven plate 6523 is located between the upper side of the torque turntable 2 and the lower side of the bottle clamping roller 66.

[0044] After the direction of the bottle clamping roller 66 is adjusted, the operator manually rotates one of the three-way screws 654. The three-way screw 654 drives the adjacent three-way screw 654 to rotate synchronously through the connection of bevel gears, so that all the three-way screws 654 rotate synchronously. Then the three-way screws 654 drive the four moving blocks 651 to move synchronously towards the axis direction of the torque turntable 2. The moving blocks 651 drive the driven plate 6523 to move synchronously through the racks 6522. At the same time, the moving blocks 651 drive the bottle clamping roller 66 to move synchronously through the swing blocks 652.

[0045] Then, the driven plate 6523 first abuts against the bottle body before the bottle clamping roller 66, and then the third stud 654 continues to rotate, so that the reaction force of the bottle body on the driven plate 6523 pushes the driven plate 6523 in a direction away from the axis of the torque turntable 2. The driven plate 6523 drives the incomplete gear 6521 to rotate through the rack 6522, and the incomplete gear 6521 drives the upper part of the bottle clamping roller 66 to tilt towards the axis of the torque turntable 2 through the swing block 652, so that the bottle clamping roller 66 abuts against the bottle body in a pre-tilted posture, thereby being able to adapt to the deformed bottle body and ensuring the stability of clamping.

[0046] It should be noted that, as Figure 2 、 Figure 3 shown, a stop rod for blocking the swing block 652 is provided on one side of the moving block 651 close to the axis of the torque turntable 2. Through the stop rod, it can be prevented that the swing block 652 drives the bottle clamping roller 66 to swing to the horizontal state in the initial state, thereby ensuring that the bottle clamping roller 66 can abut against the bottle body.

[0047] Referring to Figure 1 、 Figure 5 and Figure 6 , the detection mechanism 6 further includes sliding members 61 arranged at equal intervals along the circumferential direction of the mounting disc 5. The sliding members 61 are slidably connected to the mounting disc 5 along its radial direction. The lower part of the sliding member 61 is in a rod-shaped structure, and a lid clamping roller 62 is rotatably arranged on the outer side of the rod-shaped structure of the sliding member 61.

[0048] Referring to Figure 1 、 Figure 5 and Figure 6 , a lock roller assembly 63 for locking the rotation angle of the lid clamping roller 62 is arranged on the sliding member 61. The lock roller assembly 63 includes a first stud 631 threadedly connected to the lower part of the sliding member 61. A connection locking member 632 that is rotatably arranged on the outer side of the first stud 631 and is slidably connected to the sliding member 61 up and down is provided on the connection locking member 632, and a locking plug 633 for inserting into the corresponding lid clamping roller 62 is fixedly installed on the connection locking member 632.

[0049] When it is necessary to lock the bottle cap and the mounting disc 5 into a whole, the operator manually rotates the first stud 631 in advance according to the detection requirements, and rotates the corresponding number and position of the first studs 631 according to the number and position of the bottle cap clamping points required during detection. The first stud 631 drives the connection locking member 632 thereon to move upward relative to the lid clamping roller 62, so that the locking plug 633 on the connection locking member 632 is inserted into the corresponding lid clamping roller 62, and further the connection locking member 632 is simultaneously slidably connected to the lid clamping roller 62 and the sliding member 61 up and down, so as to lock the rotation angle of the lid clamping roller 62. In the case where the lid clamping roller 62 is detachably installed relative to the sliding member 61, when it is necessary to increase the number of bottle cap clamping points, the number of lid clamping rollers 62 is increased.

[0050] When the rotation angle of the clamping cover roller 62 is locked, the mounting disc 5 can apply static friction to the bottle cap through the clamping cover roller 62 with the locked rotation angle, and the freely rotating clamping cover roller 62 applies rolling friction to the bottle cap. Thus, by changing the number of clamping cover rollers 62 with the locked rotation angle (i.e., the rotation angle), the number of static friction clamping points for the bottle cap can be changed, and by selecting the position of the clamping cover roller 62 with the locked rotation angle, the position of the clamping points for the bottle cap can be changed.

[0051] Refer to Figure 1 、 Figure 5 and Figure 6 and

[0052] After the rotation angle of the clamping cover roller 62 is locked, the driving mechanism 3 is used to move the driving shaft 4 downward. The driving shaft 4 drives the mounting disc 5 to move downward to the position of the bottle cap, so that the mounting disc 5 drives the clamping cover roller 62 to move downward around the bottle cap, and at this time the mounting disc 5 does not contact the bottle cap. Then, according to the requirement of detecting the clamping force, the extending section of the first electric push rod 644 is extended, so that the first electric push rod 644 drives the linkage disc plate 642 to rotate relative to the driving shaft 4. The linkage disc plate 642 makes the convex rod 641 move along the radial direction of the mounting disc 5 through the spiral groove 643 thereon, so that the convex rod 641 drives the clamping cover roller 62 to move and clamp on the outer side surface of the bottle cap through the sliding member 61.

[0053] Refer to Figure 1 、 Figure 5 、 Figure 7 and Figure 8 and

[0054] When the installation disc 5 moves downward to the position of the bottle cap, the installation disc 5 drives the linkage ring part 711 to move downward synchronously. The linkage ring part 711 pushes the synchronous connecting plate 713 to rotate through the upper hinge plate 714. The synchronous connecting plate 713 simultaneously pushes the torque turntable 2 through the lower hinge plate 714. Since the torque turntable 2 cannot move, the synchronous connecting plate 713 will drive the sliding ring part 72 to slide downward to the middle position between the installation disc 5 and the torque turntable 2, so that the sliding ring part 72 is located at the middle position of the bottle body, which is convenient for extruding the easily deformable area in the middle of the bottle body, avoiding the extrusion point being located near the bottle cap of the bottle body and affecting the clamping and locking stability between the bottle body and the bottle cap. It should be noted that Figure 1 Although only the hinge plate 714 and the synchronous connecting plate 713 on one side are shown in the figure, according to requirements, the synchronous connecting plate 713 can be symmetrically arranged on the left and right to improve the structural stability.

[0055] Refer to Figure 7 and Figure 8 As shown in the figure, a connecting component 73 is arranged on the sliding ring part 72. The connecting component 73 includes a rotating ring plate 731 rotatably arranged on the sliding ring part 72. Four wheel frame blocks 74 sliding radially along the rotating ring plate 731 are arranged at equal intervals along the circumferential direction of the rotating ring plate 731. An extrusion wheel 75 is rotatably arranged at one end of the wheel frame block 74 close to the axis of the sliding ring part 72. Adjacent two wheel frame blocks 74 are hinged through a connecting plate 76.

[0056] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 and Figure 8 As shown in the figure, an actuating motor 732 is fixedly installed at the rear of the sliding ring part 72. The actuating motor 732 drives the rotating ring plate 731 to rotate through a gear transmission method. A second electric push rod 733 is arranged between the rotating ring plate 731 and one of the wheel frame blocks 74.

[0057] When the clamping roller 62 clamps on the outer side of the bottle cap, the telescopic section of the second electric push rod 733 extends to drive the corresponding wheel frame block 74 to move towards the axis direction of the rotating ring plate 731. The wheel frame block 74 connected to the second electric push rod 733 drives the extrusion wheel 75 on it to extrude the middle part of the bottle body. At the same time, the wheel frame block 74 connected to the second electric push rod 733 pushes the adjacent two wheel frame blocks 74 to synchronously move away from the axis of the rotating ring plate 731 through the connecting plate 76 on it, and makes a wheel frame block 74 opposite to the wheel frame block 74 connected to the second electric push rod 733 drive the extrusion wheel 75 on it to also extrude the middle part of the bottle body, thereby performing symmetrical extrusion on the bottle body in two opposite directions.

[0058] The bottle body is squeezed and deformed, causing the pressure inside the bottle to increase. Subsequently, the driving mechanism 3 rotates to drive the rotating shaft 4, and the rotating shaft 4 twists the bottle cap through the cap clamping roller 62. The torque applied to the bottle cap is transmitted to the torque turntable 2 through the bottle body and the bottle clamping roller 66, so as to detect and record the torque applied to the bottle cap through the torque turntable 2.

[0059] When the torque detected by the torque turntable 2 suddenly decreases, if the bottle cap is successfully opened, that is, there is no slipping phenomenon between the cap clamping roller 62 and the bottle cap. If the bottle cap is not successfully opened, that is, there is a slipping phenomenon between the cap clamping roller 62 and the bottle cap. Subsequently, increase the clamping force or the number of clamping points, and twist the bottle cap again until the bottle cap is successfully opened. The anti-slip performance of the bottle cap is detected by the clamping force and the number of clamping points acting on the bottle cap when the bottle cap is successfully opened, and the torque applied to the bottle cap when it is opened is detected by recording the maximum torque received by the bottle body when the bottle cap is successfully opened under the condition that the inside of the bottle body is in a high-pressure state.

[0060] It should be noted that the purpose of increasing the clamping force or the number of clamping points is to prevent relative slipping between the bottle body and the bottle clamping roller 66 so that the bottle body can rotate relative to the torque turntable 2 and ensure the successful opening of the bottle cap. The specific process is as follows: Increase the clamping force: The operator manually rotates one of the third studs 654, and the third stud 654 drives the adjacent third stud 654 to rotate synchronously through the bevel gear connection, so that all the third studs 654 rotate synchronously. Thus, the third stud 654 drives the four moving blocks 651 to move synchronously towards the axis direction of the torque turntable 2, and further makes the bottle clamping roller 66 move closer to the bottle body, increasing the clamping force of the bottle clamping roller 66 on the position of the side of the bottle body near the bottom (it can be clearly seen from Figure 1 ), increasing the clamping force will increase the normal pressure between the bottle body and the bottle clamping roller 66. According to the friction formula F (friction)= μ × F (normal pressure), the friction force increases accordingly. A greater friction force can resist the torque generated when twisting the bottle cap and prevent the bottle body from slipping; the friction formula is common knowledge. The above method of increasing the clamping force is applicable to both square bottle bodies and cylindrical bottle bodies, and the amount of increase in the clamping force can be adjusted during the detection process until it reaches an appropriate size; it is well known that detection is not a single process, but a process involving repeated operations, dynamic adjustment, real-time feedback, analysis, and optimization.

[0061] For a cylindrical bottle body, the clamping force of the bottle clamping roller 66 can be increased at the same time, so that a small and appropriate concave deformation occurs in the part of the bottle body within the clamping range of the bottle clamping roller 66. After the concave deformation of the bottle body occurs, the contact surface between the bottle clamping roller 66 and the bottle body changes from a tangent clamping surface to a concave clamping arc surface, and the clamping contact area increases significantly. A larger contact area can distribute more clamping force, thereby increasing the overall friction force. A local high-pressure area is formed at the concave deformation, further enhancing the friction force. The increase in the clamping force will cause two situations for an object with deformation ability, namely deformation / non-deformation, which is common knowledge. At the same time, from Figure 1 it can be clearly known that the height difference between the height of the bottle clamping roller 66 and the height of the bottle body is very large. The clamping range of the bottle clamping roller 66 is only at the position near the bottom on the side of the bottle body. The small and appropriate concave deformation caused by it is also only concentrated at the position near the bottom on the side of the bottle body. Other positions on the side of the bottle body will not deform because they are not directly affected by the clamping force of the bottle clamping roller 66, so it will not affect the subsequent detection operation under the extrusion of the extrusion wheel 75.

[0062] Increase the number of clamping points: When it is ensured that there is no relative slipping between the bottle body and the bottle clamping roller 66 and the bottle cap is not successfully opened, the number of bottle cap clamping rollers 62 is correspondingly increased to increase the number of clamping points of the bottle cap, thereby increasing the clamping force of the bottle cap. The process of increasing the bottle cap clamping roller 62 has been clearly described above and will not be elaborated here.

[0063] When the bottle body is square, the telescopic section of the second electric push rod 733 is retracted, so that the two extrusion wheels 75 that originally extruded the bottle body are far away from the bottle body, and at the same time, the two extrusion wheels 75 that were originally far away from the bottle body are extruded on the bottle body, so that the square bottle body is subjected to transposition extrusion, that is, the force application position and force application direction of the square bottle body are changed, and the detection operation under the action of forces in different directions and different positions is realized; when the bottle body is cylindrical, the execution motor 732 is started to drive the rotating ring plate 731 to rotate, and the rotating ring plate 731 drives the two extrusion wheels 75 that originally extruded the bottle body to rotate, so as to perform transposition extrusion. Similarly, it is to change the force application position and force application direction of the bottle body, and then twist the bottle cap again to detect the bottle cap opening torque when the bottle body is at different deformation positions.

[0064] It should be noted that as Figure 7 shown, the difference in the number of teeth of the gears installed on the execution motor 732 and the number of teeth of the gears installed on the rotating ring plate 731 is relatively large. The purpose of this setting is: drive the rotating ring plate 731 to rotate by the way of a small gear driving a large gear. According to the conversion formula between the gear tooth number ratio and the transmission ratio of the gear transmission system, the high-speed rotation of the small gear can be converted into the low-speed rotation of the rotating ring plate 731, and then easily drive the extrusion wheel 75 to roll on the bottle body with a large torque.

[0065] Subsequently, the telescopic section of the second electric push rod 733 is restored to its initial state so that the bottle body is not squeezed. Then, the operator assists the bottle body to return to its original state manually, so that the inside of the bottle body returns to normal pressure. After that, the bottle cap is twisted again to detect the opening torque of the bottle cap under the normal pressure state of the bottle body.

[0066] It should be noted that in this embodiment, without placing the bottle body and the bottle cap, the mounting disc 5 is directly rotated, so that the mounting disc 5 transmits torque to the torque turntable 2 through the frictional force on the linkage ring 711, thereby detecting the no-load torque data generated by the present invention without the bottle body. Subsequently, the detection reading of the torque of the torque turntable 2 by the detection table 1 is reset to zero. When detecting the bottle cap torque subsequently, the finally obtained data is subtracted by the no-load torque data to avoid additional errors.

[0067] When the present invention detects the bottle cap, the following steps are specifically carried out: First step, the operator places the bottle body on the upper side of the middle part of the torque turntable 2, and then adjusts the orientation of the plane structure of the bottle clamping roller 66 according to the shape of the bottle. The operator manually rotates the third screw 654 to drive the bottle clamping roller 66 to abut against the bottle body in a pre-tilted posture.

[0068] Second step, the operator manually rotates the first screw 631 in advance according to the detection requirements, so that the connection locking member 632 locks the rotation angles of the corresponding number and corresponding positions of the cap clamping rollers 62. The mounting disc 5 is moved downward to the position of the bottle cap through the driving mechanism 3, and the extending section of the first electric push rod 644 is extended, so that the cap clamping rollers 62 clamp the outer side surface of the bottle cap with the required clamping force for detection.

[0069] Third step, the telescopic section of the second electric push rod 733 is extended to drive the two relatively arranged pressing wheels 75 to press the middle part of the bottle body. Then, the driving mechanism 3 rotates the driving shaft 4, so that the cap clamping rollers 62 twist the bottle cap, and the torque received by the bottle cap is detected and recorded through the torque turntable 2.

[0070] Fourth step, when the torque detected by the torque turntable 2 suddenly decreases, observe whether the bottle cap can be opened smoothly to detect the anti-slip performance of the bottle cap. When the bottle cap is opened smoothly, by recording the maximum torque received by the bottle body when the bottle cap is opened smoothly, the torque received when the bottle cap is opened under the high-pressure state inside the bottle body is detected.

[0071] Fifth step, when the bottle body is square, the telescopic section of the second electric push rod 733 is retracted. When the bottle body is cylindrical, the actuating motor 732 is started to drive the pressing wheel 75 to rotate around the bottle body for displacement pressing. Then, the bottle cap is twisted again to detect the opening torque of the bottle cap at different deformation positions of the bottle body.

[0072] Sixth step, restore the telescopic section of the second electric push rod 733 to the initial state, so that the bottle body is not squeezed and the inside of the bottle body returns to the normal pressure state. Then twist the bottle cap again to detect the opening torque of the bottle cap under the normal pressure state of the bottle body.

[0073] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and still be covered by the protection scope of the present invention.

Claims

1. An automatic testing device for plastic bottle caps, comprising a testing platform, a torque turntable is rotatably arranged on the testing platform, and a driving shaft capable of rotating and moving up and down is arranged on the upper part of the testing platform through a driving mechanism, characterized in that: A mounting disc is fixedly mounted on the lower part of the driving shaft, and a detection mechanism for performing torque detection on the bottle cap is disposed on the mounting disc and the torque rotating disc; The detection mechanism comprises a sliding member arranged on the mounting disc at equal intervals along the circumference thereof, a cap clamping roller is rotatably arranged on the sliding member, a locking roller assembly for locking the rotation angle of the cap clamping roller is arranged on the sliding member, and the locking roller assembly changes the number of static frictions of the cap clamping roller on the bottle cap by changing the number of freely rotating cap clamping rollers, thereby changing the number of clamping points on the bottle cap; The detection mechanism also includes a driving assembly for driving the sliding member to move synchronously, and the detection mechanism also includes four bottle clamping rollers arranged on the torque turntable at equal intervals through the moving assembly; The extrusion mechanism is used for extruding the bottle body; the extrusion mechanism includes a sliding ring which is slidably arranged in the middle between the mounting disc and the torque turntable through a centering component, and four wheel frame blocks are arranged on the sliding ring at equal intervals along the circumference of the sliding ring through a connecting component. An extrusion wheel is rotatably arranged at one end of the wheel frame block close to the axis of the sliding ring, and two adjacent wheel frame blocks are hinged by a connecting plate. The internal space of the bottle body is reduced by squeezing the bottle body with the extrusion wheel, thereby increasing the internal pressure of the bottle body.

2. The automatic detection device for plastic bottle caps according to claim 1, characterized in that: The locking roller assembly includes a No. 1 stud threadedly connected to the lower part of the sliding member, a connecting locking member rotatably arranged on the outer side of the No. 1 stud and connected to the sliding member for sliding up and down, and a locking plug for inserting into the corresponding clamping cover roller is fixedly installed on the connecting locking member.

3. The automatic detection device for plastic bottle caps according to claim 1, characterized in that: The driving assembly includes a raised rod fixedly mounted on the upper part of the sliding member, the sliding member is slidably connected to the mounting disc along the radial direction, a linkage disc plate is rotatably arranged on the upper part of the mounting disc, and vortex grooves corresponding to the raised rods are opened at equal intervals along the circumference of the linkage disc plate, the raised rod slides inside the vortex grooves at corresponding positions, and a No. 1 electric push rod is hingedly connected between the linkage disc plate and the driving shaft.

4. The automatic detection device for plastic bottle caps according to claim 1, characterized in that: The moving assembly includes moving blocks arranged at equal intervals along the circumference of the torque turntable, a swing block is rotatably arranged inside the moving block, an adjusting rod is connected inside the swing block, the upper part of the adjusting rod is slidably connected to the bottle clamping roller at the corresponding position up and down, and the torque turntable is rotatably arranged at equal intervals along the circumference thereof, and No. 3 studs threadedly connected to the moving blocks at the corresponding positions are arranged, and two adjacent No. 3 studs are connected to each other for transmission by means of bevel gear connection.

5. The automatic detection device for plastic bottle caps according to claim 4, characterized in that: The lower part of the swing block is in a semicircular arc structure, and an incomplete gear in a semicircular ring shape is fixedly installed on the lower part of the swing block. A rack meshing with the incomplete gear is slidably connected inside the moving block, and a driven plate is fixedly installed on one side of the rack close to the axis of the torque turntable, and the upper side of the driven plate is located between the upper side of the torque turntable and the lower side of the bottle clamping roller.

6. The automatic detection device for plastic bottle caps according to claim 4, characterized in that: Four limiting support plates are fixedly installed at equal intervals along the circumference of the outer side of the middle part of the adjusting plug rod, and a cross groove for inserting the limiting support plates is opened on the swing block.

7. The automatic detection device for plastic bottle caps according to claim 4, characterized in that: The bottle clamping roller is provided with an adjustment component adapted to clamping square bottles. One side of the bottle clamping roller is a planar structure. The adjustment component includes two symmetrically arranged extended abutment plates slidably arranged on the plane structure of the bottle clamping roller. A triangular plate is slidably arranged up and down in the middle of the plane structure of the bottle clamping roller. The two inclined surfaces of the triangular plate are slidably connected to the two extended abutment plates at corresponding positions respectively.

8. The automatic detection device for plastic bottle caps according to claim 7, characterized in that: A No. 2 stud is rotatably connected inside the bottle clamping roller, the No. 2 stud is threadedly connected to an adjusting plug rod at a corresponding position, and the triangular plate is fixedly connected to the adjusting plug rod at a corresponding position.

9. The automatic detection device for plastic bottle caps according to claim 1, characterized in that: The centering component includes a linkage ring rotatably arranged on the outside of the mounting disc, and two guide columns connected to the linkage ring for upward and downward sliding are fixedly installed on the outside of the torque turntable through a support plate, and the sliding rings are connected to the middle of the guide columns for upward and downward sliding together, and a synchronous connecting plate is rotatably arranged on the middle of the right side of the sliding ring, and the two ends of the synchronous connecting plate are respectively hinged to the support plate and the linkage ring of the torque turntable through hinge plates.

10. The automatic detection device for plastic bottle caps according to claim 1, characterized in that: The connecting assembly includes a rotating ring plate rotatably arranged on a sliding ring, a wheel frame block is slidingly connected to the rotating ring plate along the radial direction of the rotating ring plate, an actuator motor is fixedly installed at the rear of the sliding ring to drive the rotating ring plate to rotate through gear transmission, and a No. 2 electric push rod is arranged between the rotating ring plate and one of the wheel frame blocks.

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