Gravity center measuring device suitable for different types of packaging boxes

Abstract

The invention relates to a gravity center measuring device suitable for different types of packaging boxes, and belongs to the technical field of gravity center measuring. The problems that in the prior art, a gravity center measuring device can only measure the gravity center of a packaging box of a fixed model, the gravity center position of a multi-dimensional space cannot be determined, the measuring precision is insufficient, and the use requirement of the responsible working condition cannot be met are solved. The device comprises a front supporting clamping ring, a rear supporting clamping ring and a movable guide rail, wherein the front supporting clamping ring and the rear supporting clamping ring are movably arranged on the movable guide rail; the two ends of the packaging box are clamped in the front supporting clamping ring and the rear supporting clamping ring respectively. The front supporting clamping ring and the rear supporting clamping ring rotate, gravity center measurement can be conducted in a multi-dimensional space, then dynamic measurement of gravity center changes of the packaging box in a vertical plane is achieved, and measurement authenticity and engineering applicability under complex working conditions are improved.

Description

Technical Field

[0001] This invention relates to the field of center of gravity measurement technology, and in particular to a center of gravity measurement device suitable for different types of packaging boxes. Background Technology

[0002] The center of gravity of packaging boxes for aviation equipment has a significant impact on the dynamic performance of the boxes. High precision is required for weight and center of gravity position. During the production and delivery of packaging boxes, it is often necessary to measure and adjust the center of gravity to meet performance requirements.

[0003] Existing packaging box measuring devices generally use customized center of gravity measuring devices, which lack versatility and result in wasted resources. Furthermore, existing center of gravity measuring devices can only measure the center of the packaging box in one dimension, and cannot accurately determine the center of gravity position of the packaging box in multi-dimensional space, making it difficult to meet the accuracy requirements under complex working conditions.

[0004] To be applicable to the measurement of weight and center of gravity of various types of packaging boxes, and to be versatile, with a simple structure, flexible support position selection, and advantages of high efficiency, high precision, and versatility, a universal device and method for weighing and determining the center of gravity of various types of packaging boxes is proposed.

[0005] Therefore, how to provide a center of gravity measuring device that can be applied to different types of packaging boxes is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] Based on the above analysis, the present invention aims to provide a center of gravity measuring device applicable to different types of packaging boxes, in order to solve one of the problems in the prior art where the center of gravity measuring device can only measure the center of gravity of a fixed model of packaging box, cannot determine the center of gravity position in multi-dimensional space, has insufficient measurement accuracy, and cannot meet the usage requirements of complex working conditions.

[0007] The present invention provides a center of gravity measuring device suitable for different types of packaging boxes, including a front support retaining ring, a rear support retaining ring and a moving guide rail, wherein the front support retaining ring and the rear support retaining ring are movably mounted on the moving guide rail;

[0008] The two ends of the packaging box are respectively secured in the front support ring and the rear support ring.

[0009] Furthermore, the center of gravity measuring device also includes a front support and a rear support.

[0010] Furthermore, both the front support and the rear support are equipped with weighing devices.

[0011] Furthermore, the front support seat is used to support the front support retaining ring.

[0012] Furthermore, the front support retaining ring is rotatably mounted on the front support seat.

[0013] Furthermore, the rear support seat is used to support the rear support retaining ring.

[0014] Furthermore, the rear support retaining ring is rotatably mounted on the rear support seat.

[0015] Furthermore, the front support retaining ring is provided with a plurality of first pressing members.

[0016] Furthermore, the rear support retaining ring is provided with multiple second pressing members.

[0017] Furthermore, multiple first pressing members press against the front end of the packaging box, and multiple second pressing members press against the rear end of the packaging box.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] (1) The center of gravity measuring device of the present invention is applicable to different types of packaging boxes. By movably setting the front support ring and the rear support ring on the moving guide rail, the distance between the two rings can be flexibly adjusted according to the length of the packaging box, adapting to different types of packaging boxes in the length range of 1000 to 10000 mm, and realizing flexible selection of support position; at the same time, the two ends of the packaging box are locked in the two rings, ensuring the basic stability of the clamping, providing a premise for the accuracy of center of gravity measurement, effectively solving the problem of poor universality of traditional customized devices, and improving the utilization rate of equipment.

[0020] (2) The center of gravity measuring device applicable to different types of packaging boxes described in this invention also includes a front support seat and a rear support seat equipped with a weight weighing device. By collecting the support reaction force data of the front and rear ends of the packaging box in real time, and combining the precise distance between the two support points, the center of gravity position of the packaging box in the horizontal dimension can be calculated using the principle of static equilibrium. Furthermore, by giving the front support ring and the rear support ring rotational freedom, and cooperating with the first top pressing member and the second top pressing member to limit the end of the packaging box, the multi-dimensional force state in actual transportation can be simulated under inclined working conditions, thereby realizing the dynamic measurement of the change of the center of gravity of the packaging box in the vertical plane, significantly improving the measurement authenticity and engineering applicability under complex working conditions.

[0021] (3) The center of gravity measuring device for different types of packaging boxes described in this invention adds a front support seat and a rear support seat to the front support clasp, rear support clasp and moving guide rail, forming a stable load-bearing structure of guide rail-support seat-clasp, which greatly improves the load-bearing capacity of the device and can be adapted to packaging boxes with a weight range of 50kg to 2000kg; at the same time, it provides a stable installation carrier for subsequent integration of weighing equipment and realization of clasp rotation, reduces measurement errors caused by weak support structure, and strengthens the structural reliability of the device.

[0022] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0023] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0024] Figure 1 This is a schematic diagram of the center of gravity measuring device applicable to different types of packaging boxes as described in Example 1;

[0025] Figure 2 This is one of the structural schematic diagrams of the center of gravity measuring device applicable to different types of packaging boxes described in Example 2;

[0026] Figure 3 This is a schematic diagram of the adjustment assembly and reset component in Example 2;

[0027] Figure 4 This is the second schematic diagram of the center of gravity measuring device applicable to different types of packaging boxes in Example 2;

[0028] Figure 5 This is a schematic diagram of the shaft and universal joint in Example 2.

[0029] Figure label:

[0030] 1-Front support retaining ring, 11-First pressing component, 111-First connecting plate, 112-First spreading arm, 12-First inner ring, 13-First intermediate ring, 14-First outer ring;

[0031] 2-Rear support retaining ring, 21-Second top pressing component, 211-Second connecting plate, 212-Second spreading arm, 22-Second inner ring, 23-Second intermediate ring, 24-Second outer ring;

[0032] 3-Moving guide rail;

[0033] 4-Front support;

[0034] 5-Rear support seat;

[0035] 6-Rotating frame, 61-Rotating groove;

[0036] 7-Adjustment assembly, 71-Fixed column, 72-Adjustment rack, 73-Fixed component, 731-Rotating shaft, 732-Bracket, 733-Locking block, 7331-U-shaped connector, 7332-Locking end, 734-Drive device, 735-Universal joint;

[0037] 8-Reset assembly, 81-Reset bracket, 82-Reset gear, 83-Reset snap ring. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0039] Example 1

[0040] This is to address one of the problems in existing technologies where center of gravity measuring devices can only measure the center of gravity of fixed-model packaging boxes, cannot determine the center of gravity position in multi-dimensional space, have insufficient measurement accuracy, and cannot meet the usage requirements of complex working conditions.

[0041] This invention provides a center of gravity measuring device suitable for different types of packaging boxes, such as... Figure 1 As shown, it includes a front support retaining ring 1, a rear support retaining ring 2, and a moving guide rail 3. The front support retaining ring 1 and the rear support retaining ring 2 are movably mounted on the moving guide rail 3.

[0042] The two ends of the packaging box are respectively secured in the front support ring 1 and the rear support ring 2.

[0043] In this embodiment, the front support ring 1 and the rear support ring 2 are movably mounted on the moving guide rail 3. The distance between the two rings can be flexibly adjusted according to the length of the packaging box, adapting to different types of packaging boxes with a length range of 1000 to 10000 mm, and realizing flexible selection of the support position. At the same time, the two ends of the packaging box are locked in the two rings, ensuring the basic stability of the clamping, providing a prerequisite for the accuracy of the center of gravity measurement, effectively solving the problem of poor versatility of traditional customized devices, and improving the utilization rate of the equipment.

[0044] Furthermore, the center of gravity measuring device also includes a front support base 4 and a rear support base 5. The addition of the front support shackle 1, the rear support shackle 2, and the moving guide rail 3 creates a stable load-bearing structure of guide rail-support base-shackle, significantly improving the device's load-bearing capacity and making it suitable for packaging boxes weighing from 50kg to 2000kg. Simultaneously, it provides a stable mounting platform for subsequent integration of weighing equipment and the realization of shackle rotation, reducing measurement errors caused by weak support structures and enhancing the structural reliability of the device.

[0045] Furthermore, both the front support 4 and the rear support 5 are equipped with weighing devices. The built-in weighing devices in the front and rear support 4 and 5 allow for direct acquisition of the load-bearing weight data at both ends of the packaging box, eliminating the need for additional external weighing devices. This simplifies the measurement process and improves the efficiency of center of gravity determination. Moreover, the weighing devices are integrated within the support bases, ensuring a direct weight transfer path, reducing external interference, and guaranteeing the accuracy of the weight data. This provides reliable basic data for subsequent center of gravity calculations, meeting the high measurement accuracy requirements of aviation equipment packaging boxes.

[0046] Furthermore, the front support base 4 is used to support the front support retaining ring 1. The supporting role of the front support base 4 on the front support retaining ring 1 is clearly defined, ensuring that the force on the front support retaining ring 1 is evenly transmitted to the moving guide rail 3 through the support base, reducing the probability of deformation or displacement of the retaining ring due to suspended installation; at the same time, it ensures stable contact between the front support retaining ring 1 and the weighing equipment, ensuring the continuity and accuracy of weight data acquisition, and providing structural protection for stable clamping and accurate weighing of the front end of the packaging box.

[0047] Furthermore, the front support retaining ring 1 is rotatably mounted on the front support base 4. The rotatable mounting of the front support retaining ring 1 on the front support base 4 allows for angle adjustment of the front end of the packaging box. Combined with the rotation of the rear support retaining ring 2, it enables the overall flipping of the packaging box (e.g., 180° flip), overcoming the limitations of single-angle measurement. By changing the angle, the center of gravity data within the packaging box's cross-section can be completed, eliminating errors caused by clamping eccentricity, ultimately achieving accurate measurement of the three-dimensional center of gravity. This is particularly suitable for irregularly shaped packaging boxes, improving the device's adaptability to various types of packaging boxes and its measurement accuracy.

[0048] Furthermore, the rear support base 5 is used to support the rear support retaining ring 2. The supporting role of the rear support base 5 on the rear support retaining ring 2 is clearly defined, forming a symmetrical load-bearing structure with the front support base 4. This ensures that the weight of the packaging box is evenly distributed across the two support points, reducing the probability of device tilting or measurement data distortion caused by excessive force on one side. Simultaneously, it provides a stable foundation for the rotation of the rear support retaining ring 2 and the installation of the weighing equipment, ensuring the overall force balance of the device and improving the support stability for long, heavy packaging boxes.

[0049] Furthermore, the rear support clasp 2 is rotatably mounted on the rear support base 5. The rotatable mounting of the rear support clasp 2 on the rear support base 5 works in conjunction with the rotation function of the front support clasp 1 to achieve synchronous overall flipping of the packaging box, reducing the probability of loosening of the clamping or displacement of the packaging box due to the fixation of a single-sided clasp during the flipping process. The clamping stability is strong during the flipping process, and the error can be calibrated through multiple weighing data from different angles, further improving the accuracy and consistency of three-dimensional center of gravity measurement, adapting to the precise measurement needs of various types of packaging boxes, including irregularly shaped and conformal surfaces.

[0050] Furthermore, the front support retaining ring 1 is provided with multiple first pressing members 11. The multiple first pressing members 11 on the front support retaining ring 1 allow for multi-point pressing to adapt to packaging boxes with different cross-sectional shapes (such as circular, irregular, and conformal surfaces) and cross-sectional diameters ranging from 400 to 1500 mm. Multi-point pressing enhances the clamping stability of the front end of the packaging box, reduces the probability of slippage or displacement during measurement or flipping, and eliminates the need for custom retaining rings for specific packaging boxes, improving the device's versatility for various types of packaging boxes and reducing clamping difficulty.

[0051] Furthermore, the rear support clasp 2 is provided with multiple second pressing members 21. The multiple second pressing members 21 on the rear support clasp 2, together with the first pressing member 11 of the front support clasp 1, form a multi-point clamping structure that echoes each other, allowing both ends of the packaging box to be securely fixed through multi-point pressing. This reduces the probability of packaging box deformation or center of gravity shift caused by uneven force at a single fixing point, while further broadening the adaptability of the device to packaging boxes of different cross-sectional sizes and shapes, and enhancing the versatility and stability of clamping various types of packaging boxes.

[0052] Furthermore, multiple first pressing members 11 press against the front end of the packaging box, and multiple second pressing members 21 press against the rear end of the packaging box. By pressing the front end of the packaging box with the first pressing members 11 and the rear end of the packaging box with the second pressing members 21, precise positioning of both ends of the packaging box is achieved, ensuring that the axis of the packaging box roughly coincides with the center of the two retaining rings, reducing measurement errors caused by clamping eccentricity. The multi-point pressing method allows for flexible adjustment of the pressing force according to the actual size and shape of the packaging box, ensuring the firmness of the clamping while adapting to the fixing requirements of both ends of different types of packaging boxes, thus taking into account measurement accuracy, versatility, and protection of the packaging box.

[0053] The center of gravity measuring device for different types of packaging boxes described in this embodiment solves one of the problems of poor versatility, insufficient accuracy, difficult clamping, and narrow applicability of traditional packaging box center of gravity measuring devices. It achieves the technical effects of universal applicability, accurate measurement, stability, reliability, and high efficiency. By adjusting the span of the front and rear support rings 2 through the moving guide rail 3, and adapting multiple sets of top pressing parts to different conformal surfaces and cross-sectional diameters of 400-1500mm, combined with the flexible adjustment capability of the adjusting screw, it can be compatible with various packaging boxes (including regular cylindrical, irregular, and conformal surfaces) within the weight range of 50kg-2000kg. No special equipment needs to be customized, solving the problem of resource waste in traditional customized devices and greatly improving equipment utilization. The rotatable design of the front and rear support rings 2, combined with the 180° flip function, breaks through the limitation of single-angle measurement, completes the three-dimensional center of gravity coordinate data, and reduces the force deviation caused by clamping eccentricity, sensor error, and irregular shape, ensuring that the measurement accuracy meets the high dynamic performance requirements of aviation equipment packaging boxes. The integration of guide rail-support base-ring-top pressing parts The structure forms a stable load-bearing system. The symmetrical support base design at the front and rear ensures even weight distribution, reducing the probability of device tilting or packaging box displacement. Multiple sets of top-pressing components provide multi-point top-pressing fixation at both ends of the packaging box, ensuring clamping firmness while allowing adjustment of the top-pressing pressure to prevent damage to the packaging box. It is suitable for clamping large-sized and heavy-weight packaging boxes, reducing the probability of slippage and deformation during measurement or flipping, balancing safety and adaptability. The overall structure of the device is simple, with clear functions for each component and smooth coordination. Operations such as support ring movement, packaging box clamping, and angle flipping are convenient, requiring no complex debugging procedures and no additional external weighing or fixing equipment. This simplifies the measurement process, improves the efficiency of center of gravity determination, and reduces equipment maintenance costs, making it suitable for high-efficiency operation scenarios such as production and factory testing.

[0054] Example 2

[0055] To further address the issues of the predetermined rotation angle of the front support retaining ring 1 and the rear support retaining ring 2, as well as the stability and accuracy of the rotation angle of the front support retaining ring 1.

[0056] This embodiment is based on embodiment 1, such as... Figure 4As shown, it also includes a rotating frame 6, a drive shaft, and a motor. The rotating frame 6 is mounted on the front support base 4 and the rear support base 4. The rotating frame 6 has a rotating groove 61. The front support retaining ring 1 and the rear support retaining ring 2 are respectively embedded in the rotating groove 61 and can rotate around the drive shaft. The motor is connected to the drive shaft for transmission. The rotation angle is set by the control module to achieve precise fixed-angle flipping. The inner wall of the rotating groove 61 is equipped with a friction-reducing bearing to reduce rotational resistance and ensure smooth rotation. An angle encoder is configured at both ends of the drive shaft to provide real-time feedback on the rotational position. It works with the brake to lock the position in place and prevent angle deviation caused by vibration. This ensures the stability and repeatability of the angle of the front support retaining ring 1 during the measurement process and further improves the accuracy of the three-dimensional center of gravity data acquisition. The drive shaft engages with the outer wall of the front support ring 1 and the outer wall of the rear support ring 2. The drive shaft drives the front support ring 1 to rotate and the drive shaft drives the rear support ring 2 to rotate. When measuring the center of gravity, the front and rear support rings 2 can be rotated synchronously to a preset angle to ensure that the packaging box is subjected to balanced force during the flipping process. After measuring the predetermined rotation angle, the center of gravity of the packaging box is measured.

[0057] To address the issues of adaptability of the front support ring 1 and rear support ring 2 to different types of packaging boxes and improve the adjustment flexibility of the front support ring 1 and rear support ring 2, this embodiment, based on embodiment 1, also includes an adjustment assembly 7. The adjustment assembly 7 is used to dynamically adjust the pressure and position of the first pressing member 11 and the second pressing member 21 according to the actual size of the packaging box, so that the first pressing member 11 and the second pressing member 21 fit the contour of the end face of the packaging box and apply uniform pressure, thereby achieving the effect of fixing the front and rear ends of packaging boxes of different sizes.

[0058] like Figure 2 As shown, the front support retaining ring 1 further includes a first inner ring 12, a first intermediate ring 13 and a first outer ring 14. The first inner ring 12 has a first through hole and the intermediate ring has a second through hole. The outer wall of the first outer ring 14 is provided with a gear ring that meshes with the drive shaft. The motor drives the drive shaft to rotate, and the drive shaft drives the gear ring to rotate, thereby realizing the rotation of the front support retaining ring 1 by a predetermined angle.

[0059] Furthermore, each of the rear support retaining rings 2 includes a second inner ring 22, a second intermediate ring 23, and a second outer ring 24. The second inner ring 22 has a third through hole, and the second intermediate ring 23 has a fourth through hole. The outer wall of the second outer ring 24 is provided with a gear ring that meshes with the drive shaft. The motor drives the drive shaft to rotate, and the drive shaft drives the gear ring to rotate, thereby realizing the rotation of the rear support retaining ring 2 by a predetermined angle.

[0060] The adjusting assembly 7 includes a fixed post 71, an adjusting rack 72, and a fixing component 73. The fixed post 71 is disposed on the inner wall of the outer ring and includes a hollow structure with one open end. One end of the adjusting rack 72 is disposed in the fixed post 71, and a connecting gear is provided at the open end of the fixed post 71, which meshes with the adjusting rack 72. The other end of the adjusting rack 72 passes through the first through hole and the second through hole (and / or the third through hole and the fourth through hole). The first pressing member 11 or the second pressing member 21 is provided. At the other end of the adjusting rack 72, the first pressing member 11 includes a first connecting plate 111 and a first spreading arm 112, and the second pressing member 21 includes a second connecting plate 211 and a second spreading arm 212. One end of the first connecting plate 111 (second connecting plate 211) is fixedly connected to the adjusting rack 72, and the first spreading arm 112 (second spreading arm 212) is disposed at the other end of the first connecting plate 111 (second connecting plate 211). The first spreading arm 112 (second spreading arm 212) is connected to the first connecting plate 72. A connecting plate 111 (second connecting plate 211) is set at an angle; there are multiple adjusting parts, with multiple first spreading arms 112 evenly distributed along the circumference of the first inner ring 12, the first intermediate ring 13 and / or the first outer ring 14, and multiple second spreading arms 212 evenly distributed along the circumference of the second inner ring 22, the second intermediate ring 23 and / or the second outer ring 24. The multiple first spreading arms 112 (second spreading arms 212) are set in a trumpet shape to move the packaging box to the front support ring 1 and the rear support ring 2. When the packaging box contacts the first opening arm 112 (second opening arm 212) and pushes it to open in all directions, the adjusting rack 72 slides through the first through hole and the second through hole and in the fixed post 71, and the connecting gear rotates accordingly to adjust the opening range of the first opening arm 112 (second opening arm 212). When the packaging box is fully inserted, the first opening arm 112 (second opening arm 212) retracts under the action of the adjusting rack 72 and fits tightly against the contour of the end face of the packaging box, so as to achieve adaptive positioning and uniform pressure.

[0061] Once the packaging box is fully inserted between the front support ring 1 and the rear support ring 2, how can the opening range of the first pressing member 11 or the second pressing member 21 be locked to ensure that the packaging box remains stably clamped during subsequent flipping or measurement? Figure 3 and Figure 5As shown, in this embodiment, the sliding position of the adjusting rack 72 is locked by the fixing component 73, so that the adjusting rack 72 cannot move, thereby fixing the opening range of the first pressing member 11 or the second pressing member 21. The fixing component 73 includes multiple rotating shafts 731, multiple brackets 732, multiple locking blocks 733, and a driving device 734. The brackets 732 are disposed on the end face of the intermediate ring, and the multiple brackets 732 are evenly distributed along the circumference of the intermediate ring. The brackets 732 are disposed opposite to the adjusting rack 72. The rotating shafts 731 are rotatably disposed on the brackets 732, and the multiple rotating shafts 731 form a polygonal structure with an opening. The driving device 734 is disposed at one end of the opening of the multiple rotating shafts 731. Two adjacent rotating shafts are connected to the driving device 734. The shaft 731 is connected by a universal joint 735. The drive device 734 is set on the shaft 731 at the opening position. The drive device 734 drives the first shaft 731 to rotate. The first shaft 731 drives the remaining shafts 731 to rotate synchronously through the universal joint 735. This causes multiple locking blocks 733 to rotate with the shaft 731 and engage in the toothed grooves on the side of the adjusting rack 72, thereby achieving one-way locking of the adjusting rack 72. When the packaging box is fully in place, the drive device 734 is activated. The locking blocks 733 are quickly embedded in the corresponding positions of the adjusting rack 72 under the drive of the shaft 731, preventing the adjusting rack 72 from sliding. This locks the opening range of the first pressing member 11 or the second pressing member 21, ensuring that the packaging box is stably clamped.

[0062] Furthermore, the locking block 733 includes a U-shaped connector 7331 and a locking end 7332. One end of the U-shaped connector 7331 is mounted on the rotating shaft 731, and the other end of the U-shaped connector 7331 is fixedly connected to the locking end 7332. The locking end 7332 has a serrated mechanism that engages with the surface of the adjusting rack 72 on the side facing the adjusting rack 72. The locking end 7332 is made of an elastic material, which can produce slight deformation when the locking block 733 is embedded in the tooth groove to enhance the tightness of the engagement and prevent loosening due to vibration. After the serrated mechanism of the locking end 7332 is fully engaged with the tooth groove on the surface of the adjusting rack 72, it achieves self-locking by relying on the preload generated by the elastic deformation. Even if the equipment is subjected to external impact or vibration during operation, it can maintain a stable locked state. At the same time, the elastic characteristics of the locking end 7332 can compensate for machining errors and assembly gaps, ensuring that the force is uniform when multiple locking blocks 733 move synchronously, further improving the clamping reliability. After the center of gravity of the packaging box is measured, the drive device 734 reverses its operation, causing the rotating shaft 731 to rotate in the opposite direction, so that the locking block 733 disengages from the groove of the adjusting rack 72 and releases the lock on the adjusting rack 72.

[0063] Furthermore, after the packaging box completes the center of gravity test, how to solve the problem of rapid reset of the adjusting rack 72 to adapt to the continuous testing requirements of packaging boxes of different sizes? In this embodiment, a reset component 8 is further included. The reset component 8 is disposed between the inner ring and the middle ring. The reset component 8 includes a reset bracket 81, a reset gear 82 and a reset snap ring 83. The reset bracket 81 is fixed on the outer wall of the middle ring. The reset gear 82 is rotatably disposed on the reset bracket 81. The reset gear 82 meshes with the teeth of the adjusting rack 72. One end of the reset snap ring 83 is connected to the reset bracket 81 and the other end is connected to the reset gear 82. When the packaging box is installed to the front support retaining ring 1 or the rear support retaining ring 2, the packaging box pushes the adjusting rack 72 to move outward. The adjusting rack 72 drives the reset gear 82 to rotate, causing the reset retaining spring 83 to twist and store energy. When the packaging box is removed, the fixing component 73 releases its lock on the adjusting rack 72, and the elastic potential energy stored in the reset retaining spring 83 is released, driving the reset gear 82 to rotate in the opposite direction, which in turn drives the adjusting rack 72 to slide inward and quickly retract to the initial position. This reset process does not require an additional power source and relies on mechanical energy storage to achieve automatic reset, which is responsive and reliable.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A center of gravity measuring device suitable for different types of packaging boxes, characterized in that, It includes a front support retaining ring (1), a rear support retaining ring (2), and a moving guide rail (3), wherein the front support retaining ring (1) and the rear support retaining ring (2) are movably mounted on the moving guide rail (3); The two ends of the packaging box are respectively secured in the front support ring (1) and the rear support ring (2).

2. The center of gravity measuring device applicable to different types of packaging boxes according to claim 1, characterized in that, The center of gravity measuring device also includes a front support (4) and a rear support (5).

3. The center of gravity measuring device applicable to different types of packaging boxes according to claim 2, characterized in that, Both the front support (4) and the rear support (5) are equipped with weighing devices.

4. The center of gravity measuring device applicable to different types of packaging boxes according to claim 2, characterized in that, The front support seat (4) is used to support the front support retaining ring (1).

5. The center of gravity measuring device applicable to different types of packaging boxes according to claim 4, characterized in that, The front support retaining ring (1) is rotatably mounted on the front support seat (4).

6. The center of gravity measuring device applicable to different types of packaging boxes according to claim 2, characterized in that, The rear support seat (5) is used to support the rear support retaining ring (2).

7. The center of gravity measuring device applicable to different types of packaging boxes according to claim 6, characterized in that, The rear support retaining ring (2) is rotatably mounted on the rear support seat (5).

8. The center of gravity measuring device applicable to different types of packaging boxes according to claim 1, characterized in that, The front support clasp (1) is provided with a plurality of first pressing members (11).

9. The center of gravity measuring device applicable to different types of packaging boxes according to claim 8, characterized in that, The rear support ring (2) is provided with a plurality of second pressing members (21).

10. The center of gravity measuring device for different types of packaging boxes according to claim 9, characterized in that, Multiple first pressing members (11) press against the front end of the packaging box, and multiple second pressing members (21) press against the rear end of the packaging box.

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