A press-fit testing device based on gear engagement

Abstract

The utility model relates to automatic equipment technical field discloses a kind of compression test device based on gear engagement, first, by using the mode of gear engagement transmission, using the meshing relationship of driving gear and driven gear, the even, stable pressure of measured device is realized, effectively avoid the problems, such as the great physical exertion of tester, low work efficiency and easy to cause occupational disease, caused by traditional manual compression mode due to lack of mechanical power, while ensuring the stability of electrical connection in test process, improve the accuracy of test result and test efficiency.Secondly, the device designs unique locking and unlocking mechanism, by the hooking of clamping piece and buckle piece and the cooperation of jacking post and avoiding groove, the stable connection and convenient separation of upper cover assembly and base are realized, further enhance the reliability of test process, prevent the stable transmission of test signal from interference in test process due to device loosening.In addition, the device is compact in structure and easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and in particular to a pressing test device based on gear meshing. Background Technology

[0002] In the production process of electronic devices, electrical testing of the devices under test is a key step in ensuring the stability, reliability and consistency of product quality. It is of great significance for improving product market competitiveness, reducing after-sales maintenance costs and maintaining corporate brand image.

[0003] Currently, traditional testing equipment typically employs a simple pressing method, manually applying pressure to the device under test (DUT) to achieve a good electrical connection between the device and the testing equipment. However, this traditional manual pressing testing method has revealed several problems that urgently need to be addressed in practical applications:

[0004] 1. During the manual application of pressure, due to the lack of effective mechanical assistance, testers often need to apply considerable force. This long-term, high-intensity physical labor not only easily causes testers to experience fatigue quickly, leading to a significant decrease in work efficiency, but may also cause occupational strain diseases such as muscle strain and joint pain due to the long-term repetitive force exertion, posing a potentially serious threat to the health of testers.

[0005] 2. The lack of a stable fixing mechanism makes it prone to loosening during the test. This loosening will directly interfere with the stable transmission of electrical test signals, thus adversely affecting the accuracy of the test results. In severe cases, it may even lead to a large deviation in the test data, making it impossible to truly reflect the actual electrical performance of the device under test.

[0006] Therefore, improvements to existing technologies are necessary.

[0007] The above information is provided as background information only to aid in understanding this utility model, and does not confirm or acknowledge whether any of the above content can be used as prior art relative to this utility model. Utility Model Content

[0008] This invention provides a pressing test device based on gear meshing to solve the problems existing in the prior art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A pressing test device based on gear meshing includes a base and a top cover assembly; wherein,

[0011] The base is provided with a placement position for placing the device under test, and is also provided with a fastening component;

[0012] The upper cover assembly can be detachably fitted onto the base for pressing down on the device under test located in the placement position for testing;

[0013] The upper cover assembly includes a cover body, a rotating handle, a driving gear, a driven gear, a stud, a lower pressure block, a hook-shaped stop block, a top post, and a hook component;

[0014] The pressing block is disposed on the side facing the base when the cover is closed on the base, and can contact the device under test when the cover is closed on the base;

[0015] The cover is provided with threaded holes;

[0016] The stud passes through the threaded hole and its lower part is connected to the lower pressure block;

[0017] The driven gear is threaded onto the upper part of the stud;

[0018] The driving gear is mounted on the rotating shaft of the rotary handle and meshes with the driven gear for transmission; the pitch circle diameter of the driving gear is smaller than that of the driven gear.

[0019] The hook is provided on the cover and is used to be adapted to engage with the buckle when the cover is closed on the base;

[0020] The hook-shaped annular stop is sleeved on the shaft of the driven gear and can rotate synchronously with the driven gear; a clearance groove is provided on a portion of the side of the hook-shaped annular stop.

[0021] The top post is located between the hook and the side of the hook annular stop;

[0022] When the cover is closed on the base, rotating the rotating handle will sequentially drive the driving gear and the driven gear to rotate, so that the stud can move up and down in the threaded hole, driving the lower pressure block to move up and down to contact or separate from the device under test.

[0023] When the hook-shaped annular stop and the driven gear rotate synchronously, the clearance groove rotates away from the top post, so that one end of the top post abuts against the side of the hook-shaped annular stop and is blocked and reset to spring back, while the other end abuts against the hook, thereby locking the hook and the fastener in the engagement state; or, the clearance groove rotates closer to the top post, so that the top post is located in the clearance groove, one end of the top post is released from obstruction and resets to spring back, while the other end is not abutting against the hook, thereby unlocking the hook and the fastener in the engagement state.

[0024] Furthermore, in the gear meshing-based pressing test device, the upper cover assembly also includes a status pointer;

[0025] The status pointer passes through the cover and is fixed to the driven gear, and can rotate synchronously with the driven gear;

[0026] The cover is provided with status indicator text that can be used in conjunction with the status pointer.

[0027] Furthermore, in the gear meshing-based pressing test device, the cover is provided with a handle.

[0028] Furthermore, in the gear meshing-based pressing test device, the thread on the stud is a rectangular thread.

[0029] Furthermore, in the gear meshing-based pressing test device, the lower pressing block is a heat dissipation block;

[0030] The pressure block can dissipate heat from the device under test when it comes into contact with the device under test.

[0031] Furthermore, in the gear meshing-based pressing test device, a heat-conducting layer is attached to the surface of the lower pressing block that contacts the device under test.

[0032] Furthermore, in the gear meshing-based pressing test device, the interior of the lower pressing block is hollow, and at least two sides of the lower pressing block are provided with a plurality of heat dissipation fins, the gaps between the heat dissipation fins communicating with the interior of the lower pressing block.

[0033] Furthermore, in the gear meshing-based pressing test device, a guide hole is provided on the side of the cover facing the base when the cover is closed onto the base;

[0034] The base is provided with a guide pin that can cooperate with the guide hole.

[0035] Furthermore, in the gear meshing-based pressing test device, the guide pin includes a positioning section and a guide section;

[0036] The positioning section is disposed on the base and is used to cooperate with the guide hole to achieve precise positioning of the cover;

[0037] The guide section has a conical structure and is connected to the positioning section; the diameter of the guide section gradually decreases from near the base to away from the base, and is used to guide the guide hole to smoothly align with the positioning section when the cover is close to the base.

[0038] Furthermore, in the gear-meshing-based pressing test device, the formula for the torque of the rotating handle is:

[0039] ;

[0040] The formula for the force required to drive the stud downward is:

[0041] ;

[0042] The transmission ratio between the driving gear and the driven gear is:

[0043] ;

[0044] The formula for the force required to drive the drive gear is:

[0045] ;

[0046] According to the lever principle, the formula for the force applied to the rotating handle is:

[0047] ;

[0048] Where T is the torque of the rotating handle; d1 is the diameter of the stud, in mm; F1 is the downward force, in N; d2 is the pitch diameter of the stud, in mm; Φ is the thread helix angle; ρ v ρ is the equivalent friction angle of the thread. v= arctan μ v μ v D is the equivalent friction coefficient of the thread; μ is the friction coefficient between the nut and the supporting surface of the connected part; w d0 is the major diameter of the nut support surface; d0 is the diameter of the threaded hole; K is the tightening torque coefficient; F2 is the force required to drive the stud downward; L1 is the radius of the rotary handle; d2 is the pitch circle diameter of the driving gear; d3 is the pitch circle diameter of the driven gear; i is the transmission ratio between the driving gear and the driven gear; F3 is the force required to drive the driving gear; F4 is the force applied to the rotary handle.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] This utility model provides a gear-based pressing test device. First, by employing gear meshing transmission, the meshing relationship between the driving gear and the driven gear achieves uniform and stable pressing of the device under test. This effectively avoids the problems of high physical exertion, low work efficiency, and occupational injury associated with traditional manual pressing methods due to the lack of mechanical assistance. Simultaneously, it ensures the stability of electrical connections during testing, improving the accuracy and efficiency of test results. Second, the device features a unique locking and unlocking mechanism. Through the engagement of hooks and latches, and the cooperation of the top post and the clearance groove, a stable connection and convenient separation of the upper cover assembly and the base are achieved, further enhancing the reliability of the testing process and preventing interference with the stable transmission of test signals due to device loosening. Furthermore, the device is compact in structure and easy to operate.

[0051] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is one of the three-dimensional structural schematic diagrams of a pressing test device (covering) based on gear meshing provided in this utility model embodiment;

[0054] Figure 2 This is the second three-dimensional structural schematic diagram of a pressing test device (covering) based on gear meshing provided in this utility model embodiment;

[0055] Figure 3 This is a three-dimensional structural diagram of the base provided in an embodiment of the present utility model;

[0056] Figure 4 This is a three-dimensional structural schematic diagram of a pressing test device based on gear meshing (uncovered and with the cover transparent) provided by an embodiment of this utility model;

[0057] Figure 5 This is a side view structural schematic diagram of a pressing test device (with the cover closed and the cover transparent) based on gear meshing provided in an embodiment of this utility model;

[0058] Figure 6 This is a force analysis diagram of a pressing test device based on gear meshing provided in an embodiment of this utility model.

[0059] Figure label:

[0060] 1. Base, 2. Top cover assembly, 3. Placement position, 4. Buckle, 5. Handle, 6. Guide pin;

[0061] Cover 21, rotating handle 22, driving gear 23, driven gear 24, stud 25, pressing block 26, hook ring block 27, top post 28, hook piece 29, status pointer 210, status indicator text 211, heat dissipation fins 212, clearance groove 213. Detailed Implementation

[0062] 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.

[0063] Please refer to Figure 1-5 This utility model provides a pressing test device based on gear meshing, including a base 1 and an upper cover assembly 2;

[0064] The base 1 serves as the fundamental support for the entire device, and it is meticulously designed with a placement position 3 specifically for placing the device under test. The dimensions, shape, and other parameters of this placement position 3 have been precisely designed to ensure that the device under test can be stably and accurately accommodated. Additionally, the base 1 is equipped with a locking component 4, which plays a crucial role in the connection and fixation of the device.

[0065] The upper cover assembly 2 is detachably fitted onto the base 1. Its main function is to apply downward pressure to the device under test located at the placement position 3, thereby enabling electrical testing of the device under test. The upper cover assembly 2 has a relatively complex and intricate structure, specifically including a cover body 21, a rotating handle 22, a driving gear 23, a driven gear 24, a stud 25, a lower pressure block 26, a hook-shaped stop block 27, a top post 28, and a hook component 29.

[0066] The pressure block 26 is cleverly positioned on the side of the cover 21 facing the base 1 when the cover 21 is closed. After the cover 21 is closed, the pressure block 26 can make contact with the device under test, thereby applying the required pressure to the device under test. The cover 21 is provided with a threaded hole, the specification of which is adapted to the stud 25, providing a stable connection basis for the subsequent transmission structure. The stud 25 passes through this threaded hole, and its lower part is firmly connected to the pressure block 26, so that the up and down movement of the stud 25 can directly drive the pressure block 26 to perform the corresponding movement. The driven gear 24 is installed on the upper part of the stud 25 by a threaded connection. This connection method ensures a tight fit and stable transmission between the driven gear 24 and the stud 25. The driving gear 23 is installed on the rotating shaft of the rotary handle 22 and meshes with the driven gear 24 for transmission. It is worth noting that the pitch circle diameter of the driving gear 23 is smaller than that of the driven gear 24. This design difference allows the lever effect to be achieved by utilizing the torque amplification effect in gear transmission, thereby saving the force required and enabling more precise control of the movement of the pressure block 26.

[0067] The hook 29 is mounted on the cover 21. Its function is to precisely engage with the latch 4 on the base 1 when the cover 21 is closed, thereby ensuring a stable connection between the upper cover assembly 2 and the base 1. The hook annular stop 27 is sleeved on the shaft of the driven gear 24 and can rotate synchronously with the driven gear 24. A clearance groove 213 is provided on the side of the hook annular stop 27. The design of this clearance groove 213 provides a key structural basis for subsequent locking and unlocking operations. The top post 28 is located between the hook 29 and the side of the hook annular stop 27. Its position has been precisely calculated and laid out to ensure that the corresponding function can be accurately achieved during the operation of the device.

[0068] When the cover 21 is closed on the base 1, the operator rotates the handle 22. The rotation of the handle 22 will sequentially drive the drive gear 23 and the driven gear 24 to rotate. Due to the threaded connection between the stud 25 and the driven gear 24, the stud 25 will move up and down in the threaded hole under the transmission of the driven gear 24, thereby driving the lower pressure block 26 to move up and down, ultimately achieving contact or separation with the device under test, and completing the pressing operation of the device under test.

[0069] During the synchronous rotation of the hook-and-loop stop 27 and the driven gear 24, two different states occur. When the clearance groove 213 rotates to a position away from the top post 28, one end of the top post 28 abuts against the side of the hook-and-loop stop 27, thus being blocked and unable to return to its original position, while the other end abuts against the hook piece 29. This abutting state locks the hook piece 29 and the fastener 4 in the engagement state, ensuring a stable connection between the upper cover assembly 2 and the base 1. Conversely, when the clearance groove 213 rotates to a position close to the top post 28, the top post 28 is located within the clearance groove 213. At this time, one end of the top post 28 is released from obstruction and returns to its original position, while the other end no longer abuts against the hook piece 29, thereby unlocking the engagement state of the hook piece 29 and the fastener 4, allowing the upper cover assembly 2 to be easily separated from the base 1.

[0070] In this embodiment, the pressing test device has several significant advantages. First, by employing an advanced gear meshing transmission method, the precise meshing relationship between the driving gear 23 and the driven gear 24 is fully utilized to achieve uniform and stable pressing of the device under test. This transmission method effectively avoids many drawbacks of traditional manual pressing methods, such as excessive physical exertion and low work efficiency due to the lack of mechanical assistance, and the risk of occupational strain diseases caused by long-term repetitive force exertion. Simultaneously, the stable pressing pressure ensures the reliability of electrical connections during testing, significantly improving the accuracy and efficiency of test results. Second, the device features a unique and ingenious locking and unlocking mechanism. Through the precise engagement of the hook 29 and the buckle 4, and the clever cooperation between the top post 28 and the clearance groove 213, a stable connection and convenient separation between the upper cover assembly 2 and the base 1 are achieved. This design further enhances the reliability of the testing process, effectively preventing interference with the stable transmission of test signals due to device loosening during testing, and ensuring the authenticity and accuracy of the test data. In addition, the device has a compact overall structure and a reasonable layout between its various components, which not only saves space but also makes it easy to operate and use, greatly improving the convenience and efficiency of testing.

[0071] In one embodiment of this example, the cover assembly 2 further includes a status pointer 210 for indicating a test state (i.e., a closed state) and a non-test state (i.e., a closed state);

[0072] The status pointer 210 is ingeniously designed; it passes through a specially reserved hole on the cover 21 and is securely fixed to the driven gear 24. Due to this fixed connection, the status pointer 210 can rotate in perfect synchronization with the driven gear 24. When the driven gear 24 rotates during transmission, the status pointer 210 rotates accordingly at the same angle and in the same direction, thus accurately reflecting the current state of the device.

[0073] To enable operators to intuitively and conveniently identify the device's status, the cover 21 is carefully equipped with status indicator text 211 that closely corresponds to the status pointer 210. These status indicator texts 211 are meticulously arranged and designed, their positions corresponding to the rotation trajectory of the status pointer 210. When the status pointer 210 rotates to a specific position, it will point to the corresponding status indicator text 211. Operators can quickly and accurately determine whether the device is currently in a testing or non-testing state simply by observing the text pointed to by the status pointer 210.

[0074] For example, when the cover 21 is closed on the base 1 for testing, the driven gear 24 will rotate at a certain angle under the transmission action, causing the status pointer 210 to rotate synchronously and point to the text area indicating "test status"; when the cover 21 is separated from the base 1 and the device is in a non-test state, the status pointer 210 will rotate to point to the text area indicating "non-test status". This intuitive status indication method greatly improves the efficiency of operators in judging the status of the device, reduces operational errors caused by misjudgment of status, and further improves the accuracy and reliability of the entire testing process.

[0075] In one embodiment of this invention, a handle 5 is provided on the cover 21.

[0076] The handle 5 is made of materials that prioritize sturdiness and durability, typically employing materials with sufficient strength and toughness to ensure it is not easily damaged during frequent use. Its ergonomic design and specially treated surface provide excellent anti-slip properties, ensuring a comfortable and secure grip and effectively preventing accidental slippage.

[0077] The installation position of the handle 5 on the cover 21 has been repeatedly considered and optimized. It is located in an area of ​​the cover 21 that is easy for the operator to grip, which will not affect the normal operation of other components of the device, and facilitates the operator's operation when it is necessary to open or move the upper cover assembly 2. When the operator needs to open the upper cover assembly 2 to install, debug or inspect the device under test, he / she can simply hold the handle 5 and apply appropriate force to lift the upper cover assembly 2 smoothly and separate it from the base 1. Similarly, after completing the relevant operations, the handle 5 can be used to accurately close the upper cover assembly 2 onto the base 1, ensuring that the hook 29 and the fastener 4 can accurately engage and achieve a stable connection of the device.

[0078] The handle 5 not only provides operators with a convenient way to operate, greatly improving the ease and efficiency of operation, but also enhances the practicality and user-friendliness of the entire device. In testing scenarios that require frequent opening and closing of the top cover assembly 2, the presence of the handle 5 can significantly reduce the workload of operators, making the testing process smoother and more efficient.

[0079] In one specific embodiment of this invention, the thread on the stud 25 was carefully designed and selected, and a rectangular thread was adopted. Rectangular threads possess a series of unique and excellent characteristics, playing a crucial role in the compression testing device.

[0080] Structurally, rectangular threads have a rectangular tooth profile with a tooth angle of 0°. Compared to other types of threads, such as triangular threads, rectangular threads have higher root strength and can withstand greater axial and radial forces. This structural characteristic makes the stud 25 more stable and reliable in transmitting power and bearing loads, less prone to thread damage or deformation, thus ensuring the stability and durability of the device during long-term use.

[0081] In terms of transmission performance, rectangular threads offer extremely high transmission efficiency. Due to the characteristics of their tooth profile, frictional losses are minimal during the engagement of the stud 25 with the threaded hole, enabling more effective conversion of rotary motion into linear motion. When the rotating handle 22 drives the driving gear 23 and driven gear 24 to rotate, thereby driving the stud 25 to rotate, the rectangular thread ensures that the stud 25 moves smoothly and efficiently up and down within the threaded hole. This smooth movement characteristic allows the pressure block 26 to apply pressure to the device under test at a uniform speed and force, avoiding test errors caused by uneven pressure and effectively improving the accuracy and reliability of the test results.

[0082] More importantly, the rectangular thread possesses excellent mechanical self-locking performance. In the compression testing device, after the stud 25 drives the lower pressure block 26 to apply pressure to the device under test and reach the required test state, the special structure of the rectangular thread enables the stud 25 to automatically lock in its current position, preventing accidental movement of the stud 25 due to external forces or device vibration. This mechanical self-locking function ensures that the lower pressure block 26 can maintain a stable downward pressure at all times, providing a constant and reliable testing environment for the device under test, further enhancing the stability and reliability of the testing process.

[0083] In summary, the rectangular thread design on the stud 25 not only ensures smooth operation during the pressing process and improves the accuracy and reliability of the test, but also guarantees the stability of the pressing pressure during the test through the mechanical self-locking function, providing strong support for the excellent performance of the entire pressing test device.

[0084] In one specific embodiment of this example, the lower pressure block 26 is designed as a heat dissipation block with heat dissipation function, and this innovative design plays an important role in the pressing test process.

[0085] When the pressure testing device is in operation, the lower pressure block 26 descends with the rotation of the stud 25 and comes into close contact with the device under test (DUT). The lower pressure block 26 utilizes its heat dissipation characteristics to provide real-time heat dissipation for the DUT. In many electronic DUT testing scenarios, the device generates a large amount of heat when powered on or subjected to pressure testing. If this heat cannot be dissipated in time, it will accumulate inside the device, causing a sharp rise in temperature. Excessive temperature not only affects the device's performance parameters and causes deviations in test results, but may also cause permanent damage to the device, affecting its lifespan. The lower pressure block 26, acting as a heat sink, can effectively conduct the heat generated by the DUT away from the device in a timely manner, effectively controlling the device's temperature and ensuring that the test is conducted in a suitable temperature environment, thereby improving the accuracy and reliability of the test results.

[0086] To further improve the heat dissipation of the pressure block 26, a thermally conductive layer is attached to the surface of the pressure block 26 that contacts the device under test (DUT). The thermally conductive layer is typically made of a material with high thermal conductivity, such as thermally conductive silicone pads or thermally conductive graphite sheets. These materials have excellent thermal conductivity, enabling them to quickly conduct heat generated on the contact surface between the pressure block 26 and the DUT to the interior of the pressure block 26. The presence of the thermally conductive layer not only increases the heat conduction area but also reduces contact thermal resistance, allowing heat to be transferred more efficiently from the DUT to the pressure block 26, thereby accelerating the heat dissipation process. Simultaneously, the thermally conductive layer also possesses a certain degree of elasticity and flexibility, allowing it to adapt to minor unevenness on the surface of the DUT, ensuring a tight fit between the pressure block 26 and the DUT, further improving heat conduction efficiency.

[0087] In addition to the aforementioned heat dissipation measures, the pressure block 26 can also employ an innovative structure with an internal hollow interior and heat dissipation fins 212 on its sides. The hollow design of the pressure block 26 creates a relatively independent heat dissipation space. When the heat from the device under test (DUT) is conducted to the interior of the pressure block 26 through the thermally conductive layer, hot air flow is generated within the hollow space. The numerous heat dissipation fins 212 on at least two sides of the pressure block 26 further increase the heat dissipation area. The gaps between the heat dissipation fins 212 connect to the interior of the pressure block 26, allowing the hot air within the hollow space to exchange with the outside air through convection. During testing, as the hot air rises and cold air from the outside replenishes, an effective heat dissipation cycle is formed, accelerating heat dissipation. This design, combining heat dissipation fins and a hollow structure, significantly improves the heat dissipation efficiency of the pressure block 26, enabling faster and more effective dissipation of the heat generated by the DUT to the surrounding environment, providing a stable low-temperature testing environment for the DUT.

[0088] In summary, the pressure block 26, through the design of the heat sink, the application of the thermal conductive layer, and the innovative use of heat sink fins and hollow structure, forms a multi-layer heat dissipation system that can efficiently dissipate heat from the device under test during the pressing test, ensuring the smooth progress of the test and the accuracy of the test results.

[0089] In one specific embodiment presented in this example, when the cover 21 is in the state of being closed on the base 1, a guide hole is carefully provided on the surface of the cover 21 facing the base 1. The position of the guide hole is precisely designed, and its size and shape are also strictly considered to ensure that it can be precisely matched with the corresponding subsequent components.

[0090] Meanwhile, a guide pin 6 is provided on the base 1 at the guide hole position corresponding to the cover 21, which can perfectly match the guide hole. The guide pin 6 is installed in a precise position on the base 1, and its height and angle have been repeatedly adjusted to ensure that it can play its expected role during the closing process of the cover 21.

[0091] Specifically, the guide pin 6 employs a unique design structure, consisting of a positioning section and a guide section. The positioning section is securely mounted on the base 1, and its shape and size are adapted to the guide hole on the cover 21. During the process of the cover 21 closing onto the base 1, the positioning section accurately inserts into the guide hole. Through the tight fit between the two, precise positioning of the cover 21 in both the horizontal and vertical directions is achieved. This precise positioning mechanism ensures the accurate relative position between the cover 21 and the base 1, avoiding problems such as incomplete sealing and component collisions caused by positional deviations, thus providing a strong guarantee for the stable operation of the entire device.

[0092] The guide section has a conical structure and is closely connected to the positioning section, forming an organic whole. The diameter of the guide section exhibits a distinct variation, gradually decreasing from the end closest to the base 1 to the end furthest from it. This gradually narrowing conical structure plays a crucial guiding role as the cover 21 approaches the base 1. As the cover 21 gradually descends and approaches the base 1, due to the change in the guide section's diameter, even if the cover 21 deviates to some extent during its descent, the guide section can gradually guide the guide hole to the correct position through its conical surface, ensuring smooth alignment between the guide hole and the positioning section. This guiding mechanism greatly improves the accuracy and smoothness of the cover 21's closing, reduces operational difficulties and time wastage caused by poor closing, and improves the overall efficiency and reliability of the device.

[0093] In summary, through the ingenious cooperation between the guide hole on the cover 21 and the guide pin 6 on the base 1, as well as the unique design of the positioning section and the guide section in the guide pin 6, the cover 21 is accurately positioned and smoothly connected during the closing process, laying a solid foundation for the normal operation and stable performance of the entire device.

[0094] Please refer to Figure 6 In one embodiment of this invention, the formula for the torque of the rotating handle 22 is:

[0095] ;

[0096] The formula for the force required to drive the stud 25 downward is:

[0097] ;

[0098] The transmission ratio between the driving gear 23 and the driven gear 24 is:

[0099] ;

[0100] The formula for the force required to drive the drive gear 23 is:

[0101] ;

[0102] According to the lever principle, the formula for the force applied to the rotating handle 22 is:

[0103] ;

[0104] Where T is the torque of the rotating handle 22; d1 is the diameter of the stud 25 in mm; F1 is the downward force in N; d2 is the mean diameter of the stud 25 in mm; Φ is the thread helix angle; ρ v ρ is the equivalent friction angle of the thread. v= arctan μ v μ v D is the equivalent friction coefficient of the thread; μ is the friction coefficient between the nut and the supporting surface of the connected part; w d0 is the major diameter of the nut support surface; d2 is the diameter of the threaded hole; K is the tightening torque coefficient; F2 is the force required to drive the stud 25 downward; L1 is the radius of the rotating handle 22; d2 is the pitch circle diameter of the driving gear 23; d3 is the pitch circle diameter of the driven gear 24; i is the transmission ratio between the driving gear 23 and the driven gear 24; F3 is the force required to drive the driving gear 23; F4 is the force applied to the rotating handle 22.

[0105] For example, taking K=0.15, d=36, and since F1=3000N, substituting into the above formula, we get T=16200N·mm;

[0106] The force required to drive the stud 25 downward is: F2 = T / 60mm = 270N;

[0107] If the gear transmission ratio is i=d2 / d3=1 / 3, then the force required to drive the driving gear 23 is F3=1 / 3F2=90N;

[0108] According to the lever principle, F3*1 / 2d3=F4*L1, then the force applied to the rotating handle 22 is F4=90*0.5*40 / 50=36N.

[0109] This device utilizes the principle of gear meshing and speed reduction to reduce force, and uses the stud 25 of the rectangular thread to press down. With the help of the lever principle, the output torque is maximized through transmission. It effectively saves the size of the force-applying device and assembly space, and achieves a large downward force output in a small size, thereby improving the operator's work efficiency.

[0110] Although this utility model uses terms such as "base" and "cover" frequently, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0111] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this utility model, this should not limit the scope of patent protection of this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this utility model and utilizing the content described in the text and drawings of this utility model, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this utility model.

Claims

1. A pressing test device based on gear meshing, characterized in that, Includes a base (1) and a top cover assembly (2); wherein, The base (1) is provided with a placement position (3) for placing the device under test, and is provided with a fastener (4). The upper cover assembly (2) is detachably fitted onto the base (1) for pressing down on the device under test located in the placement position (3) for testing; The upper cover assembly (2) includes a cover body (21), a rotating handle (22), a driving gear (23), a driven gear (24), a stud (25), a lower pressing block (26), a hook-shaped stop block (27), a top post (28), and a hook component (29). The pressing block (26) is disposed on the side facing the base (1) when the cover (21) is closed on the base (1), and can contact the device under test when the cover (21) is closed on the base (1); The cover (21) is provided with threaded holes; The stud (25) passes through the threaded hole and its lower part is connected to the lower pressure block (26); The driven gear (24) is threaded onto the upper part of the stud (25); The driving gear (23) is mounted on the rotating shaft of the rotating handle (22) and meshes with the driven gear (24) for transmission; the pitch circle diameter of the driving gear (23) is smaller than the pitch circle diameter of the driven gear (24); The hook (29) is disposed on the cover (21) and is used to be adapted to hook with the buckle (4) when the cover (21) is closed on the base (1); The hook-shaped annular stop (27) is sleeved on the shaft of the driven gear (24) and can rotate synchronously with the driven gear (24); a clearance groove (213) is provided on a part of the side of the hook-shaped annular stop (27). The top post (28) is located between the hook (29) and the side of the hook annular stop (27); When the cover (21) is closed on the base (1), when the rotating handle (22) is rotated, the driving gear (23) and the driven gear (24) are driven to rotate in sequence, so that the stud (25) can move up and down in the threaded hole, driving the lower pressure block (26) to move up and down, so as to contact or separate from the device under test; When the hook ring block (27) and the driven gear (24) rotate synchronously, the clearance groove (213) rotates away from the top post (28), so that one end of the top post (28) abuts against the side of the hook ring block (27) and is blocked and reset to spring back, while the other end abuts against the hook member (29), thereby locking the hook member (29) and the buckle member (4) in the engagement state; or, the clearance groove (213) rotates to be close to the top post (28), so that the top post (28) is located in the clearance groove (213), one end of the top post (28) is released from the block and resets to spring back, while the other end is not abutting against the hook member (29), thereby unlocking the hook member (29) and the buckle member (4) in the engagement state.

2. The compression testing device based on gear meshing according to claim 1, characterized in that, The upper cover assembly (2) also includes a status pointer (210); The status pointer (210) passes through the cover (21) and is fixed to the driven gear (24), and can rotate synchronously with the driven gear (24); The cover (21) is provided with status indicator text (211) that can cooperate with the status pointer (210).

3. The compression testing device based on gear meshing according to claim 1, characterized in that, The cover (21) is provided with a handle (5).

4. The compression testing device based on gear meshing according to claim 1, characterized in that, The thread on the stud (25) is a rectangular thread.

5. The compression testing device based on gear meshing according to claim 1, characterized in that, The pressure block (26) is a heat dissipation block; The pressure block (26) can dissipate heat from the device under test when it comes into contact with the device under test.

6. The compression testing device based on gear meshing according to claim 5, characterized in that, A thermally conductive layer is attached to the surface of the pressure block (26) that contacts the device under test.

7. The gear meshing-based compression testing device according to claim 5 or 6, characterized in that, The interior of the pressure block (26) is hollow, and at least two sides of the pressure block (26) are provided with a plurality of heat dissipation fins (212), and the gap between the heat dissipation fins (212) communicates with the interior of the pressure block (26).

8. The compression testing device based on gear meshing according to claim 1, characterized in that, When the cover (21) is closed onto the base (1), a guide hole is provided on the side facing the base (1); The base (1) is provided with a guide pin (6) that can cooperate with the guide hole.

9. The compression testing device based on gear meshing according to claim 8, characterized in that, The guide pin (6) includes a positioning section and a guide section; The positioning section is disposed on the base (1) and is used to cooperate with the guide hole to achieve precise positioning of the cover (21); The guide section is a conical structure and is connected to the positioning section; the diameter of the guide section gradually decreases from near the base (1) to away from the base (1), and is used to guide the guide hole to smoothly connect with the positioning section when the cover (21) is close to the base (1).

10. The compression testing device based on gear meshing according to claim 1, characterized in that, The formula for the torque of the rotating handle (22) is: ； The formula for the force required to drive the stud (25) downward is: ； The transmission ratio between the driving gear (23) and the driven gear (24) is: ; The formula for the force required to drive the drive gear (23) is: ； According to the lever principle, the formula for the force applied to the rotating handle (22) is: ； Where T is the torque of the rotating handle (22); d1 is the diameter of the stud (25) in mm; F1 is the downward force in N; d2 is the mean diameter of the stud (25) in mm; Φ is the thread helix angle; ρ v ρ is the equivalent friction angle of the thread. v= arctan μ v μ v D is the equivalent friction coefficient of the thread; μ is the friction coefficient between the nut and the supporting surface of the connected part; w d0 is the major diameter of the nut support surface; d0 is the diameter of the threaded hole; K is the tightening torque coefficient; F2 is the force required to drive the stud (25) down; L1 is the radius of the rotary handle (22); d2 is the pitch circle diameter of the driving gear (23); d3 is the pitch circle diameter of the driven gear (24); i is the transmission ratio between the driving gear (23) and the driven gear (24); F3 is the force required to drive the driving gear (23); F4 is the force applied to the rotary handle (22).

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