Automatic swing arm device for puncture strength tester

Abstract

The utility model relates to impact resistance detection technical field discloses a kind of automatic swing arm devices of puncture strength tester, including release module and reset module, for converting swing arm between initial position and end position.Release block is consistent with the swing arm height located in initial position, for selectively clamping and fixing the swing end of swing arm, first drive unit drives release block and the swing end of swing arm to disconnect, the swing end of swing arm free falls, to convert swing arm from initial position to end position, automatically release swing arm;Transmission wheel and reset rod keep fixed, the driving end of second drive unit can be lengthened or shortened to change the rotating direction of transmission wheel, reset rod end abuts on the swing end of swing arm, drive swing arm to lift to with release block re-clamping, to convert swing arm from end position to initial position, automatically reset swing arm, reduce mechanical wear, improve the security and stability in the use process of puncture strength tester automatic swing arm device.

Description

Technical Field

[0001] This utility model relates to the field of impact resistance testing technology, and in particular to an automatic swing arm device for a puncture strength tester. Background Technology

[0002] Puncture strength is an important indicator for measuring the impact resistance of cardboard. It reflects the cardboard's ability to resist impact and protect the contents of the package, and to some extent, it also demonstrates the cardboard's durability during use.

[0003] Currently, widely used instruments in the industry, such as the PE.01-ED puncture strength tester, are used as physical property testing devices for cardboard. During operation, both the safety switch and release knob need to be pulled simultaneously to release the swing arm for testing. Manually pulling the switch cannot guarantee that the force is aligned with the direction of movement of the safety switch and release knob, often resulting in radial deflection. This can lead to wear and misalignment of the holes in the safety switch and release block, causing the release system to lock. Once locked, the safety switch needs to be disassembled and reset to continue operation, affecting testing efficiency. Furthermore, resetting the swing arm requires manual lifting. Due to the weight of the swing arm and counterweight, this operation inevitably exerts an impact force on the release block, accelerating wear on mechanical components such as the release block and increasing the probability of the release system locking up. Additionally, during operation, the operator must reach into the equipment, posing a significant safety hazard.

[0004] Therefore, there is an urgent need for an automatic swing arm device for a puncture strength tester, which can be used to improve the safety and stability of the equipment during use. Utility Model Content

[0005] The purpose of this invention is to provide an automatic swing arm device for a puncture strength tester, which can automatically release and reset the swing arm, reduce mechanical wear and the probability of locking failure, reduce operational risks, and improve safety and stability during use.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An automatic swing arm device for a puncture strength tester is used to switch the swing arm between an initial position and an end position. When the swing arm is in the initial position, the swing end and the pivot end of the swing arm are at the same horizontal height. When the swing arm is in the end position, the pivot end of the swing arm is directly above the swing end of the swing arm. The automatic swing arm device for the puncture strength tester includes:

[0008] The release module includes a first drive unit, a release block, and a release bracket. The release block is at the same height as the swing arm at the initial position. The release block is slidably mounted on the release bracket in a horizontal direction. The drive end of the first drive unit is connected to one end of the release block, and the other end of the release block is used to selectively fix the swing end of the swing arm. When the drive end of the first drive unit drives the release block to slide away from the swing arm, the swing end of the swing arm disengages from the release block, thereby changing the swing arm from the initial position to the final position.

[0009] A reset module includes a housing, a second drive unit, a transmission wheel, and a reset rod. The transmission wheel is rotatably connected to the housing and fixed to the reset rod. The drive end of the second drive unit is drively connected to the transmission wheel and can extend or shorten to change the rotation direction of the transmission wheel. When the transmission wheel rotates in a preset direction, the end of the reset rod abuts against the swing end of the swing arm, and the reset rod drives the swing end of the swing arm to rise until it engages with the release block, thereby changing the swing arm from the end position to the initial position.

[0010] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the second drive unit includes a bidirectional cylinder and a rack. The drive end of the bidirectional cylinder is connected to the rack, the transmission wheel is a gear, and the rack meshes with the gear for transmission.

[0011] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the second drive unit further includes two positioning bearings. The two positioning bearings are disposed on the side of the rack away from the gear, and the two positioning bearings are spaced apart along the movement direction parallel to the drive end of the bidirectional cylinder. The positioning bearings slide against the rack.

[0012] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the second drive unit also includes a two-position three-way reversing valve, which is connected to the bidirectional cylinder and is used to change the airflow direction input to the bidirectional cylinder so that the drive end of the bidirectional cylinder extends or shortens.

[0013] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the second drive unit also includes a silencer, which is configured as a bottle-shaped plastic container and is filled with fiber clumps. The silencer is used to receive the airflow output from the bidirectional cylinder.

[0014] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the reset module further includes a metal fixing component. The second drive unit and the transmission wheel are both located inside the housing, and the metal fixing component and the reset rod are both located outside the housing. One end of the metal fixing component passes through the housing and is fixedly connected to the transmission wheel. The metal fixing component can detachably fix the reset rod.

[0015] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the metal fixing component includes a through-joint, a clamp, a first adjusting member, and a second adjusting member. The through-joint is connected to the transmission wheel, and the through-joint and the clamp are movably connected through the first adjusting member. The first adjusting member can adjust the distance between the through-joint and the clamp along the rotation axis of the transmission wheel.

[0016] The clamping member includes two valves, which are movably connected by the second adjusting member. The second adjusting member can adjust the distance between the two valves so that the two valves clamp the reset rod.

[0017] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the tail end of the reset rod is set as an arc segment.

[0018] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the first driving unit includes a one-way cylinder, a metal component and an elastic element. The one-way cylinder is fixed to the release bracket. The driving end of the one-way cylinder is arranged parallel to the release block and is connected to the metal component. The end of the release block away from the swing arm passes through the release bracket and is provided with a limiting part. The elastic element is sleeved on the outside of the release block, and the two ends of the elastic element abut against the limiting part and the release bracket, respectively.

[0019] As an optional technical solution for the automatic swing arm device of the puncture strength tester, the first drive unit further includes a foot valve, which is connected to the one-way cylinder and is used to input airflow into the one-way cylinder to move the drive end of the one-way cylinder.

[0020] The beneficial effects of this utility model are:

[0021] The automatic swing arm device for a puncture strength tester provided by this utility model includes a release module and a reset module. The rotating shaft end of the swing arm is rotatably mounted, while the swinging end of the swing arm can swing freely. This automatic swing arm device for a puncture strength tester is used to switch the swing arm between an initial position and an end position. When the swing arm is in the initial position, the swinging end of the swing arm and the rotating shaft end are at the same horizontal height, the swing arm is in a horizontal state, and the swinging end of the swing arm accumulates a certain potential energy. When the swing arm switches from the initial position to the end position, the swinging end of the swing arm falls freely and impacts the cardboard to be tested. When the swing arm is in the end position, the rotating shaft end of the swing arm is directly above the swinging end of the swing arm, and the swinging end of the swing arm maintains a natural hanging state under the action of gravity.

[0022] The release module includes a first drive unit, a release block, and a release bracket. The release block is at the same height as the swing arm in its initial position and slides horizontally on the release bracket. The drive end of the first drive unit is connected to one end of the release block, and the other end of the release block is used to selectively fix the swing end of the swing arm. When the swing arm is in its initial position, the swing end of the swing arm is fixed in a preset position by engaging with the release block. When the drive end of the first drive unit drives the release block to slide away from the swing arm, the swing end of the swing arm disengages from the release block, and the swing end of the swing arm falls freely, thus changing the swing arm from its initial position to its final position. By adding the release module, the swing arm can be automatically released, avoiding the problem of the release system locking due to misalignment or wear of the hole components caused by radial deflection during manual pulling. This saves physical effort and prevents operators from reaching their hands into the equipment, reducing operational risks and improving safety.

[0023] The reset module includes a housing, a second drive unit, a transmission wheel, and a reset rod. A metal fixing bracket is located on the outer bottom of the housing. The housing is connected to the base of the puncture strength tester via the metal fixing bracket and bolts, ensuring a stable connection and preventing shaking during use. The transmission wheel is rotatably connected to the housing while remaining fixed to the reset rod. The drive end of the second drive unit is connected to the transmission wheel, and its extension or retraction can change the rotation direction of the transmission wheel. When the transmission wheel rotates in a preset direction, the end of the reset rod abuts against the swing end of the swing arm, driving the swing arm to rotate. The reset rod also lifts the swing end of the swing arm to re-engage with the release block, thus returning the swing arm from its final position to its initial position. By adding a reset module, the automatic reset of the swing arm is achieved, reducing the impact on the release block when the swing arm is manually raised and returned to its original position. This prevents misalignment with the release module, effectively reducing wear on other mechanical parts in the equipment caused by manual reset and avoiding safety hazards. It also improves the safety and stability of the automatic swing arm device of the puncture strength tester during use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the reset module of the automatic swing arm device of the puncture strength tester provided in a specific embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the linkage structure between the bidirectional cylinder and the reset rod of the automatic swing arm device of the puncture strength tester provided in a specific embodiment of this utility model.

[0026] Figure 3 This is a diagram showing the internal structure of the reset module of the automatic swing arm device of the puncture strength tester provided in a specific embodiment of this utility model.

[0027] Figure 4 This is a schematic diagram of the assembly structure of the transmission wheel and metal fixing component of the automatic swing arm device of the puncture strength tester provided in a specific embodiment of this utility model.

[0028] Figure 5 This is a structural schematic diagram of the automatic swing arm device (outer shell not shown) of the puncture strength tester with the swing arm in the initial position, provided in a specific embodiment of this utility model.

[0029] Figure 6 This is a structural schematic diagram of the automatic swing arm device (outer shell not shown) of the puncture strength tester with the swing arm in the end position, provided in a specific embodiment of this utility model.

[0030] In the picture:

[0031] 100. Release module; 111. One-way cylinder; 112. Metal component; 120. Release block; 130. Release bracket;

[0032] 200. Reset module; 210. Housing; 221. Two-way cylinder; 222. Rack; 223. Positioning bearing; 224. Two-position three-way directional valve; 225. Muffler; 230. Drive wheel; 240. Reset rod; 241. Arc-shaped section; 250. Metal fixing assembly; 251. Connector; 252. Hoop connector; 253. First adjusting component; 254. Second adjusting component;

[0033] 900, swing arm; 901, pivot end; 902, swing end. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] like Figures 1 to 6 As shown, this utility model discloses an automatic swing arm device for a puncture strength tester. The pivot end 901 of the swing arm 900 is rotatably mounted, while the swing end 902 of the swing arm 900 can swing freely. This automatic swing arm device for a puncture strength tester includes two independent operating systems: a release module 100 and a reset module 200, used to switch the swing arm 900 between an initial position and an end position.

[0039] When the swing arm 900 is in the initial position, the swing end 902 and the pivot end 901 of the swing arm 900 are at the same horizontal height, the swing arm 900 is in a horizontal state, and the swing end 902 of the swing arm 900 accumulates a certain potential energy; when the swing arm 900 changes from the initial position to the end position, the swing end 902 of the swing arm 900 falls freely and will impact the cardboard to be tested; when the swing arm 900 is in the end position, the pivot end 901 of the swing arm 900 is directly above the swing end 902 of the swing arm 900, and the swing end 902 of the swing arm 900 remains in a natural hanging state under the action of gravity.

[0040] Specifically, the release module 100 includes a first drive unit, a release block 120, and a release bracket 130. The release block 120 is at the same height as the swing arm 900 in its initial position. The release block 120 is slidably mounted on the release bracket 130 in a horizontal direction. The drive end of the first drive unit is connected to one end of the release block 120, and the other end of the release block 120 is used to selectively fix the swing end 902 of the swing arm 900. When the swing arm 900 is in its initial position, the swing end 902 of the swing arm 900 is fixed in a preset position by engaging with the release block 120. When the drive end of the first drive unit drives the release block 120 to slide away from the swing arm 900, the swing end 902 of the swing arm 900 disengages from the release block 120, and the swing end 902 of the swing arm 900 falls freely, thereby changing the swing arm 900 from its initial position to its final position. By adding a release module 100, the swing arm 900 can be released automatically, avoiding the problem of the release system locking up due to misalignment or wear of the hole parts caused by radial deflection during manual pulling operation.

[0041] In this embodiment, the first driving unit includes a one-way cylinder 111, a metal component 112, and an elastic element. The one-way cylinder 111 is generally a single-acting micro cylinder. By connecting compressed air, it drives the piston rod to move horizontally outward in one direction. Using pneumatic release can reduce the physical exertion of the operator and improve work efficiency. The one-way cylinder 111 is fixed at a suitable position on the release bracket 130, so that the one-way cylinder 111 has a horizontal stroke direction, with the piston rod of the one-way cylinder 111 serving as the driving end of the one-way cylinder 111. The piston rod of the one-way cylinder 111 and the release block 120 are arranged parallel to each other and are both connected to the metal component 112. The metal component 112 is a hollow rectangular frame. The end of the piston rod of the one-way cylinder 111 is connected to the release block 120 using positioning screws and nuts. The movement of the piston rod of the one-way cylinder 111 drives the release block 120 to move horizontally in sync. For example, the metal component 112 may be a sheet of stainless steel with holes to extend service life and reduce assembly volume.

[0042] Optionally, the first drive unit also includes a foot valve, which is connected to the one-way cylinder 111 and is used to input airflow into the one-way cylinder 111 to make the drive end of the one-way cylinder 111 move. The foot valve controls the movement state of the one-way cylinder 111, thereby controlling the release of the swing arm 900.

[0043] Furthermore, the end of the release block 120 away from the swing arm 900 passes through the release bracket 130 and is provided with a limiting part. The elastic element is sleeved on the outside of the release block 120, and the two ends of the elastic element abut against the limiting part and the release bracket 130 respectively. In practical use, the automatic swing arm device of the puncture strength tester is activated by pressing the foot pedal valve, which connects the one-way cylinder 111 to compressed air. The piston rod of the one-way cylinder 111 moves horizontally, causing the release block 120 to move horizontally as well. At this point, the release block 120 disengages from the swing arm 900, and the swing arm 900 is released. Then, the foot pedal valve can be released, and no compressed air is connected to the one-way cylinder 111. The piston rod of the one-way cylinder 111 is in a free state, the elastic element returns to its original deformation, and the release block 120 and the piston rod of the one-way cylinder 111 are reset. The operator does not need to manually pull the switch. The resettable structure of the one-way cylinder 111 and the elastic element replaces the ordinary switch, preventing accidental operation. It saves physical strength and avoids the operator from putting their hands into the equipment where their view is obstructed, reducing operational risks and improving safety.

[0044] Specifically, the reset module 200 includes a housing 210, a second drive unit, a transmission wheel 230, and a reset rod 240. A metal fixing bracket is provided on the outer bottom of the housing 210. The housing 210 is connected to the base of the puncture strength tester via the metal fixing bracket and bolts, ensuring a stable connection between the housing 210 and the base of the puncture strength tester, preventing shaking during use. The transmission wheel 230 is rotatably connected to the housing 210, and simultaneously fixed to the reset rod 240. The drive end of the second drive unit is drively connected to the transmission wheel 230, and the drive end of the second drive unit can extend or retract to change the rotation direction of the transmission wheel 230. When the transmission wheel 230 rotates in a preset direction, the end of the reset rod 240 abuts against the swing end 902 of the swing arm 900, driving the swing arm 900 to rotate. The reset rod 240 can also lift the swing end 902 of the swing arm 900 to re-engage with the release block 120, thereby changing the swing arm 900 from its end position to its initial position. By adding a reset module 200, the automatic reset of the swing arm 900 is achieved, reducing the impact on the release block 120 when the swing arm 900 is manually raised and returned to its original position. Therefore, there will be no misalignment with the release module 100, which can effectively reduce the wear of other mechanical parts in the equipment caused by manual reset and avoid safety hazards. The safety and stability of the automatic swing arm device of the puncture strength tester are comprehensively improved during use.

[0045] In this embodiment, the second drive unit includes a bidirectional cylinder 221 and a rack 222. The bidirectional cylinder 221 is firmly fixed to the inner bottom of the housing 210 with bolts to ensure stability during operation and to ensure that the piston rod of the bidirectional cylinder 221 moves perpendicular to the base of the puncture strength tester. The piston rod of the bidirectional cylinder 221, as the drive end of the bidirectional cylinder 221, is welded firmly to the rack 222 to ensure that the rack 222 can move in a stable linear motion as the piston rod of the bidirectional cylinder 221 extends and retracts. The transmission wheel 230 is a gear, and one side of the rack 222 meshes with the gear to transmit power, converting the linear motion of the bidirectional cylinder 221 into the rotational motion of the reset rod 240. The gear is mounted inside the housing 210 through a fixed bearing to ensure that the gear can rotate freely. By connecting compressed air, power is provided to drive the rotation of the reset rod 240. Pneumatic reset can reduce the physical exertion of operators and improve work efficiency. At the same time, the reset module 200 has a simple and compact structure, stable operation, and is easy to maintain.

[0046] Optionally, the second drive unit also includes two positioning bearings 223. After determining the position of the rack 222, the two positioning bearings 223 are set on the side of the rack 222 away from the gear. The two positioning bearings 223 are spaced apart next to the rack 222 along the direction of movement parallel to the drive end of the bidirectional cylinder 221, and the positioning bearings 223 are kept in sliding contact with the rack 222. The positions of the two positioning bearings 223 are symmetrically and equidistantly distributed along the center of the gear and the vertical line of the rack 222, which can ensure that the rack 222 does not move or wobble when it meshes with the gear. This is used to fix the movement path of the rack 222 and ensure good meshing between the rack 222 and the gear.

[0047] Furthermore, the second drive unit and the transmission wheel 230 are both located inside the housing 210, which can protect the second drive unit from external interference and has the effect of dust prevention and extending the service life of the structure. The reset module 200 also includes a metal fixing component 250. The metal fixing component 250 and the reset rod 240 are both located outside the housing 210. One end of the metal fixing component 250 passes through the housing 210 and is fixedly connected to the transmission wheel 230. The gear is fixedly connected to the reset rod 240 through the metal fixing component 250, and the metal fixing component 250 can detachably fix the reset rod 240.

[0048] For example, the length and position of the reset rod 240 need to be adjusted by the metal fixing assembly 250 according to the reset requirements of the swing arm 900 to ensure that the reset rod 240 can effectively lift the swing arm 900. The metal fixing assembly 250 includes a through member 251, a clamping member 252, a first adjusting member 253, and a second adjusting member 254. The through member 251 is connected to the transmission wheel 230, and the through member 251 and the clamping member 252 are movably connected by the first adjusting member 253. The first adjusting member 253 can adjust the distance between the through member 251 and the clamping member 252 along the rotation axis of the transmission wheel 230, that is, adjust the fixed position of the reset rod 240 in the axial direction of the transmission wheel 230. Specifically, the clamping member 252 includes two flaps, which are movably connected by a second adjusting member 254. The second adjusting member 254 can adjust the distance between the two flaps so that the two flaps selectively clamp the reset rod 240. By setting the second adjusting member 254, the metal fixing assembly 250 can be equipped with reset rods 240 of different specifications, and the clamping position of the reset rod 240 can be changed. The effective working length of the reset rod 240 can be freely adjusted, thereby improving the applicability of the automatic swing arm device of the puncture strength tester.

[0049] Understandably, the end of the reset rod 240 that contacts the swing arm 900 is set as an arc-shaped segment 241, which can more stably abut against the swing end 902 of the swing arm 900 and drive the swing arm 900 to rotate and lift until the reset is completed and returns to the initial position.

[0050] In this embodiment, the second drive unit also includes a two-position three-way reversing valve 224. The two-position three-way reversing valve 224 is connected to the bidirectional cylinder 221 via an air pipe to ensure smooth airflow. It is used to change the airflow direction into the bidirectional cylinder 221, causing the drive end of the bidirectional cylinder 221 to extend or shorten. This allows control of the reset rod 240 to rotate clockwise or counterclockwise to reset the swing arm 900, making operation more convenient. The two-position three-way reversing valve 224 is installed in a position convenient for manual operation. By manually controlling the intake and exhaust of the bidirectional cylinder 221, the extension and retraction of the piston rod of the bidirectional cylinder 221 can be achieved. Furthermore, by adjusting and controlling the air pressure in the air passage, the movement speed of the piston rod of the bidirectional cylinder 221 can be controlled, thereby controlling the rotation speed of the reset rod 240.

[0051] In practical use, firstly, operate the two-position three-way directional valve 224 to allow air to enter from the lower part and exhaust from the upper part of the bidirectional cylinder 221, pushing the piston rod of the bidirectional cylinder 221 upward, causing the rack 222 to move vertically upward. The rack 222 drives the gear to rotate, thereby causing the reset rod 240 to rotate counterclockwise to the end position of the swing arm 900, away from the release module 100. At this time, the position of the reset rod 240 does not affect the movement of the swing arm 900. When the swing arm 900 changes from the initial position to the end position, it means that the single impact test is over. Operate the two-position three-way directional valve 224 again to allow air to enter from the upper part and exhaust from the lower part of the bidirectional cylinder 221, causing the piston rod of the bidirectional cylinder 221 to retract, causing the rack 222 to move vertically downward. The rack 222 drives the gear to rotate in the opposite direction, thereby causing the reset rod 240 to rotate clockwise, causing the swing arm 900 to return to the initial position where it engages with the release block 120, completing the reset of the swing arm 900.

[0052] Optionally, the second drive unit also includes a muffler 225, which is configured as a bottle-shaped plastic container with an open top, and the interior of the muffler 225 is filled with fiber clumps. The muffler 225 is used to receive compressed air output from the bidirectional cylinder 221, thereby achieving a noise reduction effect and reducing the noise when the airflow is discharged.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A poking strength tester automatic swing arm device, characterized in that, The automatic swing arm device of the puncture strength tester includes: A device for switching the swing arm (900) between an initial position and an end position. When the swing arm (900) is in the initial position, the swing end (902) and the pivot end (901) of the swing arm (900) are at the same horizontal height. When the swing arm (900) is in the end position, the pivot end (901) of the swing arm (900) is directly above the swing end (902) of the swing arm (900). A release module (100) includes a first drive unit, a release block (120), and a release bracket (130). The release block (120) is at the same height as the swing arm (900) located in the initial position. The release block (120) is slidably disposed on the release bracket (130) in the horizontal direction. The drive end of the first drive unit is connected to one end of the release block (120), and the other end of the release block (120) is used to selectively fix the swing end (902) of the swing arm (900). When the drive end of the first drive unit drives the release block (120) to slide away from the swing arm (900), the swing end (902) of the swing arm (900) is disengaged from the release block (120) to switch the swing arm (900) from the initial position to the final position. A reset module (200) includes a housing (210), a second drive unit, a transmission wheel (230), and a reset rod (240). The transmission wheel (230) is rotatably connected to the housing (210) and fixed to the reset rod (240). The drive end of the second drive unit is connected to the transmission wheel (230) and can extend or shorten to change the rotation direction of the transmission wheel (230). When the transmission wheel (230) rotates in a preset direction, the end of the reset rod (240) abuts against the swing end (902) of the swing arm (900), and the reset rod (240) drives the swing end (902) of the swing arm (900) to rise to engage with the release block (120) to switch the swing arm (900) from the end position to the initial position.

2. The automatic swing arm apparatus for a poke strength tester of claim 1, wherein, The second drive unit includes a bidirectional cylinder (221) and a rack (222). The drive end of the bidirectional cylinder (221) is connected to the rack (222). The transmission wheel (230) is a gear, and the rack (222) meshes with the gear for transmission.

3. The automatic swing arm apparatus for a poke strength tester of claim 2, wherein, The second drive unit also includes two positioning bearings (223), which are disposed on the side of the rack (222) away from the gear, and are spaced apart along the movement direction parallel to the drive end of the bidirectional cylinder (221). The positioning bearings (223) slide against the rack (222).

4. The automatic swing arm apparatus for a poke strength tester of claim 2, wherein, The second drive unit also includes a two-position three-way reversing valve (224), which is connected to the bidirectional cylinder (221) and is used to change the airflow direction input to the bidirectional cylinder (221) so that the drive end of the bidirectional cylinder (221) extends or shortens.

5. The automatic swing arm apparatus for a poke strength tester of claim 2, wherein, The second drive unit also includes a muffler (225), which is configured as a bottle-shaped plastic container and is filled with fiber clumps. The muffler (225) is used to receive the airflow output from the bidirectional cylinder (221).

6. The poke strength tester automatic swing arm apparatus of claim 1 wherein, The reset module (200) further includes a metal fixing component (250). The second drive unit and the transmission wheel (230) are both located inside the housing (210), and the metal fixing component (250) and the reset rod (240) are both located outside the housing (210). One end of the metal fixing component (250) passes through the housing (210) and is fixedly connected to the transmission wheel (230). The metal fixing component (250) detachably fixes the reset rod (240).

7. The automatic swing arm apparatus for a poke strength tester of claim 6, wherein, The metal fixing assembly (250) includes a through-joint (251), a clamping member (252), a first adjusting member (253), and a second adjusting member (254). The through-joint (251) is connected to the transmission wheel (230). The through-joint (251) and the clamping member (252) are movably connected through the first adjusting member (253). The first adjusting member (253) can adjust the distance between the through-joint (251) and the clamping member (252) along the rotation axis of the transmission wheel (230). The clamping member (252) includes two valves, which are movably connected by the second adjusting member (254). The second adjusting member (254) can adjust the distance between the two valves so that the two valves clamp the reset rod (240).

8. The automatic swing arm device for the puncture strength tester according to claim 1, characterized in that, The tail end of the reset rod (240) is configured as an arc segment (241).

9. The automatic swing arm apparatus for a poke strength tester of any of claims 1-8, wherein, The first drive unit includes a one-way cylinder (111), a metal component (112), and an elastic element. The one-way cylinder (111) is fixed to the release bracket (130). The drive end of the one-way cylinder (111) is arranged parallel to the release block (120) and is connected to the metal component (112). The end of the release block (120) away from the swing arm (900) passes through the release bracket (130) and is provided with a limiting part. The elastic element is sleeved on the outside of the release block (120), and the two ends of the elastic element abut against the limiting part and the release bracket (130) respectively.

10. The automatic swing arm device for the puncture strength tester according to claim 9, characterized in that, The first drive unit also includes a foot valve, which is connected to the one-way cylinder (111) and is used to input airflow into the one-way cylinder (111) to move the drive end of the one-way cylinder (111).

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