Mechanical detection equipment for tensile strength of mask

Abstract

The utility model discloses mechanical detection equipment for tensile strength of a mask, which comprises a base and a driving mechanism, and a fixed seat is arranged on the left side of the upper end of the base; the driving mechanism comprises a rack plate, a mounting seat, a cross rod, a gear and a connecting seat, the rack plate is arranged in a mounting groove formed in the middle of the front end of the fixing seat, the mounting seat is slidably connected to the middle of the outer surface of the rack plate, the cross rod is rotatably connected to the front side in the mounting seat, and the gear is arranged in the middle of the outer arc surface of the cross rod and is in meshed connection with the rack plate; a connecting seat is arranged at the front end of the mounting seat, a dynamometer is arranged at the front end of the connecting seat, and a probe is arranged in the middle of the lower end of the dynamometer, the mechanical detection equipment for the tensile strength of the mask can apply tensile force to the mask belt through the dynamometer, so that the action of pulling the mask belt is simulated, and the tensile force is uniform and constant; and the reliability of the test result is further improved.

Description

Technical Field

[0001] This utility model relates to the technical field of mask testing equipment, specifically a mechanical testing device for the tensile strength of masks. Background Technology

[0002] Face masks are a common type of personal protective equipment, primarily used to block airborne particles, droplets, viruses, bacteria, etc., protecting respiratory health. Mechanical testing equipment for the tensile strength of face masks is an instrument specifically designed to evaluate the tensile performance of face masks. Its main function is to test the strength, toughness, and elasticity of the mask material under stress by simulating tensile conditions in actual use. This ensures that the mask will not break or deform under tensile force during use, thus guaranteeing the safety and reliability of the mask. The existing technology is authorized by publication number CN 212206897. U's patent discloses a device for testing the tensile deformation strength of nylon ribbons, including a base with two wire clamps on it. A pull cylinder is placed on the base, and the wire clamps are mounted on the telescopic rod of the pull cylinder. A lifting cylinder is placed between the wire clamps, and a lifting block is mounted on the lifting cylinder. Although this device can apply tension to the mask straps through the cylinder during use, the cylinder's power comes from compressed air, and the air pressure may be affected by factors such as air source pressure, pipeline leakage, and valve response, resulting in unstable output force. In the tensile strength test of masks, if the tension of the drive component is unstable, a certain error will occur, which will ultimately affect the reliability of the test results. Therefore, we propose a mechanical testing device for the tensile strength of masks. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a mechanical testing device for the tensile strength of masks. It can apply a tensile force to the mask straps through a force measuring instrument, thereby simulating the action of pulling the mask straps. This tensile force is uniform and constant, which solves the problem of test error caused by unstable cylinder output force, and further improves the reliability of test results. It can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a mechanical testing device for the tensile strength of face masks, including a base, a fixed seat provided on the left side of the upper end of the base, and a driving mechanism;

[0005] Drive mechanism: It includes a rack plate, a mounting base, a crossbar, a gear, and a connecting seat. The rack plate is set in a mounting groove opened in the middle of the front end of the fixed base. The mounting base is slidably connected to the middle of the outer surface of the rack plate. The crossbar is rotatably connected to the front side inside the mounting base. The gear is set in the middle of the outer arc surface of the crossbar. The gear meshes with the rack plate. The connecting seat is set at the front end of the mounting base. The force gauge is set at the front end of the connecting seat. The probe is set in the middle of the lower end of the force gauge. The force gauge can apply a pulling force to the mask strap, thereby simulating the action of pulling the mask strap. This pulling force is uniform and constant, which solves the problem of test error caused by unstable cylinder output force and further improves the reliability of test results.

[0006] Furthermore, it also includes a PLC controller, which is located at the top of the base. The input terminal of the PLC controller is electrically connected to an external power supply, and the force gauge is bidirectionally electrically connected to the PLC controller, enabling it to regulate the electrical components inside the equipment.

[0007] Furthermore, the drive mechanism also includes a worm gear and a worm. The worm gear is located on the right side of the outer arc surface of the crossbar, and the worm is rotatably connected to the right side of the front wall of the mounting base. The worm gear and the worm are meshed together, and the crossbar can drive the gear to rotate.

[0008] Furthermore, the drive mechanism also includes a servo motor, which is located on the right side of the rear wall of the mounting base. The front end of the servo motor's output shaft is fixedly connected to the rear end of the worm gear, and the input end of the servo motor is electrically connected to the output end of the PLC controller, enabling the worm gear to rotate through the worm.

[0009] Furthermore, the driving mechanism also includes guide slides, which are respectively disposed on the front and rear sides inside the mounting groove. The four guide slides are slidably connected to the corresponding sliding holes at the lower end of the mounting base, playing a guiding role and further improving the stability of the mounting base during movement.

[0010] Furthermore, it also includes a fixing plate, which is set at the lower end of the probe. Mounting plates are set on the front side of the upper end of the base and the middle of the lower end of the fixing plate. The left end of the mounting plate on the right side is respectively provided with a clamping plate, which can clamp and fix the mask.

[0011] Furthermore, it also includes an electric push rod, which is located at the left end of the mounting plate on the right side. The left end of the telescopic end of the electric push rod is fixedly connected to a clamping plate. The input end of the electric push rod is electrically connected to the output end of the PLC controller, which can drive the clamping plate to move.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This mechanical testing equipment for the tensile strength of face masks has the following advantages:

[0013] The device can apply tension to the mask straps using a force gauge, thus simulating the action of pulling the mask straps. This tension is uniform and constant, unaffected by external air pressure fluctuations, solving the problem of test errors caused by unstable cylinder output force and further improving the reliability of test results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the right side of this utility model;

[0016] Figure 3 This is a schematic diagram of the upper sectional structure of this utility model;

[0017] Figure 4 This is an enlarged structural diagram of point A in this utility model.

[0018] In the diagram: 1. Base, 2. PLC controller, 3. Fixing seat, 4. Force gauge, 5. Fixing plate, 6. Drive mechanism, 61. Rack plate, 62. Mounting seat, 63. Crossbar, 64. Gear, 65. Worm gear, 66. Worm, 67. Servo motor, 68. Guide slide column, 69. Connecting seat, 7. Mounting plate, 8. Electric push rod, 9. Clamping plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This embodiment provides a technical solution: a mechanical testing device for the tensile strength of a mask, including a base 1, a fixed seat 3 on the left side of the upper end of the base 1, and a driving mechanism 6;

[0021] Drive mechanism 6 includes a rack plate 61, a mounting base 62, a crossbar 63, a gear 64, and a connecting seat 69. The rack plate 61 is disposed in a mounting groove opened in the middle of the front end of the fixed base 3. The mounting base 62 is slidably connected to the middle of the outer surface of the rack plate 61. The crossbar 63 is rotatably connected to the front side inside the mounting base 62. The gear 64 is disposed in the middle of the outer arc surface of the crossbar 63 and meshes with the rack plate 61. The connecting seat 69 is disposed at the front end of the mounting base 62. The force gauge 4 is disposed at the front end of the connecting seat 69. The probe is disposed in the middle of the lower end of the force gauge 4. Drive mechanism 6 also includes a worm gear 65 and a worm 66. The worm gear 65 is disposed on the right side of the outer arc surface of the crossbar 63. The worm 66 is rotatably connected to the right side of the front wall of the mounting base 62. The drive mechanism 6 also includes a servo motor 67, which is located on the right side of the rear wall of the mounting base 62. The front end of the output shaft of the servo motor 67 is fixedly connected to the rear end of the worm gear 66. The input end of the servo motor 67 is electrically connected to the output end of the PLC controller 2. The drive mechanism 6 also includes guide slides 68, which are respectively located on the front and rear sides inside the mounting groove. The four guide slides 68 are slidably connected to the corresponding sliding holes at the lower end of the mounting base 62. The force gauge 4 can apply a pulling force to the mask strap, thereby simulating the action of pulling the mask strap. This pulling force is uniform and constant, which solves the problem of test error caused by unstable cylinder output force and further improves the reliability of the test results.

[0022] It also includes a PLC controller 2, which is located on the upper part of the base 1. The input terminal of the PLC controller 2 is electrically connected to an external power supply. The force gauge 4 is bidirectionally electrically connected to the PLC controller 2, which can regulate the electrical components inside the equipment.

[0023] The device also includes a fixing plate 5, which is located at the lower end of the probe. Mounting plates 7 are provided on the front side of the upper end of the base 1 and the middle of the lower end of the fixing plate 5. The left end of the mounting plate 7 on the right side is provided with a clamping plate 9. The driving component drives the clamping plate 9 on the lower side to move to the left, thereby fixing the lower end of the mask. Then the operator unfolds the mask so that the upper end of the mask is located between the mounting plate 7 and the clamping plate 9 on the upper side. Then the driving component drives the clamping plate 9 on the upper side to move to the left, thereby fixing the upper side of the mask.

[0024] The device includes an electric push rod 8, which is located on the left end of the mounting plate 7 on the right side. The left end of the telescopic end of the electric push rod 8 is fixedly connected to a clamping plate 9. The input ends of the electric push rod 7 are electrically connected to the output ends of the PLC controller 2. Under the control of the PLC controller 2, the lower electric push rod 8 starts to operate, and its telescopic end extends, thereby moving the lower clamping plate 9 to the left, thus fixing the lower end of the mask. Then, the operator unfolds the mask, placing the upper end between the upper mounting plate 7 and the clamping plate 9. Then, under the control of the PLC controller 2, the upper electric push rod 8 starts to operate, and its telescopic end extends, thereby moving the upper clamping plate 9 to the left, thus fixing the upper part of the mask.

[0025] The working principle of the mechanical testing equipment for the tensile strength of masks provided by this utility model is as follows: During the use of the mechanical testing equipment for the tensile strength of masks, the lower end of the mask to be tested is first placed between the lower mounting plate 7 and the clamping plate 9. Then, under the control of the PLC controller 2, the lower electric push rod 8 starts to operate, and its telescopic end extends, thereby driving the lower clamping plate 9 to move to the left, thus fixing the lower end of the mask. Then, the operator unfolds the mask so that the upper end of the mask is located between the upper mounting plate 7 and the clamping plate 9. Then, under the control of the PLC controller 2, the upper electric push rod 8 starts to operate, and its telescopic end extends, thereby driving the upper clamping plate 9 to move to the left, thus fixing the upper part of the mask. At this time, under the control of the PLC controller 2… Servo motor 67 starts running, and its output shaft drives worm gear 66 to rotate. During rotation, worm gear 66 drives worm wheel 65 to rotate through meshing connection. Worm wheel 65 drives gear 64 to rotate through crossbar 63. Gear 64 drives mounting base 62 to move upward along guide slide column 68 through meshing connection with rack plate 61. During the movement of mounting base 62, force gauge 4 moves upward through connecting seat 69, thereby causing force gauge 4 to stretch the mask through mounting plate 7 and clamping plate 9 on the upper side. During this process, force gauge 4 detects the tensile force applied to the mask through probe. Force gauge 4 can transmit the detected data to PLC controller 2 in real time. When the mask breaks, the operator can evaluate the tensile strength of the mask based on the data provided by force gauge 4.

[0026] It is worth noting that the PLC controller 2 disclosed in the above embodiments can be an S7-300, the force gauge 4 can be an SF2-500N, the servo motor 67 can be an ECMA-C20604RS, and the electric actuator 8 can be a YRJ0905. The PLC controller 2 controls the operation of the force gauge 4, the servo motor 67, and the electric actuator 8 using methods commonly used in the prior art.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mechanical testing device for the tensile strength of face masks, comprising a base (1), wherein a fixing seat (3) is provided on the left side of the upper end of the base (1), characterized in that: It also includes a drive mechanism (6); Drive mechanism (6): It includes rack plate (61), mounting base (62), cross bar (63), gear (64) and connecting base (69). The rack plate (61) is set in the mounting groove opened in the middle of the front end of the fixed base (3). The mounting base (62) is slidably connected to the middle of the outer surface of the rack plate (61). The cross bar (63) is rotatably connected to the front side inside the mounting base (62). The gear (64) is set in the middle of the outer arc surface of the cross bar (63). The gear (64) meshes with the rack plate (61). The connecting base (69) is set at the front end of the mounting base (62). The force measuring instrument (4) is set at the front end of the connecting base (69). The probe is set in the middle of the lower end of the force measuring instrument (4).

2. The mechanical testing equipment for the tensile strength of face masks according to claim 1, characterized in that: It also includes a PLC controller (2), which is located on the upper end of the base (1). The input terminal of the PLC controller (2) is electrically connected to an external power supply, and the force gauge (4) is electrically connected to the PLC controller (2) in both directions.

3. The mechanical testing equipment for the tensile strength of face masks according to claim 2, characterized in that: The drive mechanism (6) further includes a worm wheel (65) and a worm (66). The worm wheel (65) is located on the right side of the outer arc surface of the crossbar (63). The worm (66) is rotatably connected to the right side of the front wall of the mounting base (62). The worm wheel (65) and the worm (66) are meshed together.

4. The mechanical testing equipment for the tensile strength of face masks according to claim 3, characterized in that: The drive mechanism (6) also includes a servo motor (67), which is located on the right side of the rear wall of the mounting base (62). The front end of the output shaft of the servo motor (67) is fixedly connected to the rear end of the worm gear (66), and the input end of the servo motor (67) is electrically connected to the output end of the PLC controller (2).

5. The mechanical testing equipment for the tensile strength of face masks according to claim 1, characterized in that: The drive mechanism (6) also includes guide slides (68), which are respectively disposed on the front and rear sides inside the mounting groove. The four guide slides (68) are slidably connected to the sliding holes corresponding to the lower end of the mounting base (62).

6. The mechanical testing equipment for the tensile strength of face masks according to claim 2, characterized in that: It also includes a fixing plate (5), which is located at the lower end of the probe. Mounting plates (7) are provided on the front side of the upper end of the base (1) and the middle part of the lower end of the fixing plate (5). A clamping plate (9) is provided on the left end of the mounting plate (7) on the right side.

7. The mechanical testing equipment for the tensile strength of face masks according to claim 6, characterized in that: It also includes an electric push rod (8), which is located at the left end of the mounting plate (7) on the right side. The left end of the telescopic end of the electric push rod (8) is fixedly connected to a clamp (9). The input end of the electric push rod (8) is electrically connected to the output end of the PLC controller (2).

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