A tube clamp device fine adjustment structure

Abstract

This invention relates to the field of pipe clamp technology and discloses a pipe clamp fine-tuning structure, including a conduit, a fixed seat fixedly installed on the top of the conduit, and a movable seat slidably installed on the conduit. A clamping plate made of bamboo and wood is fixedly installed on the lower end face of the fixed seat, while a movable plate made of bamboo and wood is slidably installed on the upper end face of the movable seat along the axial direction of the conduit. A drive motor for driving the movable plate to move axially is also fixedly installed inside the movable seat. A push rod connected to the drive motor is fixedly connected below the movable plate. This application uses the drive motor to drive the push rod to generate a periodic axial reciprocating lifting motion after the movable plate contacts the object to be clamped and reaches a preset initial clamping force. This allows the bamboo and wood clamping plate and the movable plate to complete most of the creep deformation in the early stage of clamping, thereby eliminating the hidden danger of continuous attenuation of clamping force due to the creep of the bamboo and wood material during long-term use.

Description

Technical Field

[0001] This invention relates to the field of pipe clamp technology, specifically to a pipe clamp fine-tuning structure. Background Technology

[0002] Pipe clamps are widely used clamping and fixing devices in mechanical tooling, woodworking, and pipe installation and fixing. Their ease of operation, clamping stability, and workpiece protection capabilities directly determine work efficiency and processing quality. When using a pipe clamp, rotate its handle or pull the lever, and the movable chuck will press the workpiece to generate a stable clamping force. They are widely used in woodworking mortise and tenon assembly, board gluing, frame fixing, and other scenarios.

[0003] To achieve non-destructive clamping of workpieces (especially wooden ones) and avoid scratching the workpiece surface with hard clamping surfaces, existing pipe clamps typically use soft wood for the clamping surface. However, wood, as a natural organic biomass material, possesses significant viscoelasticity and moisture-expanding-shrinkage properties. During long-term clamping operations, the wood clamping surface undergoes slow microscopic slippage and rearrangement of its internal fiber structure under continuous and constant compressive stress, resulting in irreversible creep deformation. Macroscopically, this manifests as a continuous reduction in the thickness of the clamping surface. The mechanical locking structure at the moving end of the pipe clamp remains fixed in axial position after locking and cannot automatically compensate for the creep deformation of the wood material. This leads to a continuous release of the actual contact stress inside the clamping structure, ultimately causing a significant decrease or even complete loss of clamping force, resulting in clamping failure. In contrast, clamping surfaces made of traditional metal or engineering plastics have minimal creep due to their homogeneous materials, and almost do not exhibit this problem. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a pipe clamp fine-tuning structure that can automatically sense and compensate for creep displacement of wood materials in a passively locked state. This solves the problem that existing wooden clamping surfaces undergo irreversible creep deformation under continuous clamping stress, and the locked mechanical structure cannot automatically compensate for this material thickness reduction, leading to a continuous loss of clamping force.

[0005] (II) Technical Solution To achieve the aforementioned objective of automatically sensing and compensating for creep displacement of wood materials under passive locking conditions, this invention provides the following technical solution: a pipe clamp fine-tuning structure, comprising a conduit, a fixed seat fixedly installed on the top of the conduit, and a movable seat slidably installed on the conduit. A clamping plate made of bamboo or wood is fixedly installed on the lower end face of the fixed seat, while a movable plate made of bamboo or wood is slidably installed on the upper end face of the movable seat along the axial direction of the conduit. A drive motor for driving the movable plate to move axially is also fixedly installed inside the movable seat. A push rod connected to the drive motor is fixedly connected below the movable plate. When the movable plate contacts the object being clamped and reaches a preset clamping force, the drive motor drives the push rod to generate axial periodic lifting and lowering, causing the movable plate to vibrate and accelerate the creep of the movable plate.

[0006] Preferably, an amplification module for amplifying the vibration of the movable plate is further provided between the movable plate and the push rod. The amplification module includes a spring and a receiving plate. The receiving plate is assembled at the bottom of the movable plate, and a shaft hole for installing the spring is machined at the bottom of the receiving plate. The top end of the spring is fixedly connected to the receiving plate. The push rod is coaxially inserted into the shaft hole and slidably connected to the shaft hole. When the push rod performs axial periodic lifting and lowering, it axially compresses the spring and amplifies the vibration amplitude generated by the movable plate during the elastic deformation process of the spring.

[0007] Preferably, the amplification module further includes an airbag to bear the axial pressure of the movable plate. The airbag is pre-filled with a fluid medium and is fixedly installed between the movable plate and the receiving plate. The airbag is compressed when the movable plate comes into contact with the object being clamped, and the axial vibration generated by the push rod on the receiving plate through periodic lifting and lowering is evenly distributed to the movable plate through the airbag.

[0008] Preferably, the internal cavity of the airbag is connected to an indicator with a built-in indicator plate. The outer surface of the indicator plate is provided with at least two sets of scales. The indicator plate can generate corresponding axial displacement with the pressure change inside the airbag. When the push rod drives the movable plate to vibrate, when the displacement range of the indicator plate stabilizes and no longer expands, it indicates that the clamping surface of the movable plate has reached a creep stabilization state.

[0009] Preferably, the indicator is fixedly installed on the side of the movable plate.

[0010] Preferably, the bottom end face of the movable plate is machined with a sliding groove, the receiving plate is slidably assembled in the sliding groove, and one end of the airbag is fixedly connected to the sliding groove, while the other end of the airbag is fixedly connected to the receiving plate.

[0011] Preferably, the fluid medium pre-filled inside the airbag is a gas or a liquid.

[0012] Preferably, the push rod is a lead screw structure, and a drive sleeve for driving its rotation and lifting is coaxially mounted on the push rod. The drive sleeve is installed inside the movable seat and rotatably connected to the movable seat. The drive sleeve is also machined with meshing teeth. A reducer is also fixedly installed inside the movable seat. The output end of the reducer meshes with the meshing teeth for transmission, while the input end of the reducer is connected to the drive motor for transmission.

[0013] Preferably, the movable seat has a sliding hole at the top, the push rod is coaxially and movably installed in the sliding hole, and the movable seat also has a mounting hole machined inside, the drive sleeve is coaxially and rotatably installed on the mounting hole.

[0014] Preferably, a locking piece is fitted between the movable seat and the guide tube, and a battery control module that provides power and control for the drive motor is also fixedly installed inside the movable seat. The battery control module is electrically connected to the drive motor, and a control switch electrically connected to the drive motor and the battery control module is provided on the side of the movable seat.

[0015] Preferably, the reducer has a self-locking function.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a pipe clamp fine-tuning structure, which has the following beneficial effects: 1. This pipe clamp fine-tuning structure, through the drive motor, automatically switches the control mode after the movable plate contacts the object to be clamped and reaches the preset initial clamping force. The drive motor then drives the push rod to generate axial reciprocating periodic lifting and lowering motion, thereby causing the movable plate to produce high-frequency, micro-amplitude axial vibration. This vibration can overcome the static friction between the internal fiber structures of the bamboo and wood material, accelerating fiber slippage and void collapse. This allows the bamboo and wood clamping plate and the movable plate to complete most of the creep deformation in the initial clamping stage. Compared to traditional technologies that rely on the bamboo and wood material to naturally complete creep under static clamping conditions, this significantly shortens the time required for creep stabilization. This eliminates the risk of continuous attenuation of clamping force due to creep of bamboo and wood materials during long-term use, thus preventing such issues from occurring during the clamping stage. Simultaneously, the drive motor can sense its own current changes in real time during vibration. When the bamboo and wood clamping plate and the movable plate experience creep thinning, leading to a decrease in contact stress, the drive motor automatically pushes the vibration center of the push rod slightly towards the object being clamped. This ensures that the movable plate always maintains a tight fit with the object with a preset clamping force, achieving adaptive compensation for creep displacement of the bamboo and wood materials. This ensures the continuous stability of the clamping force during vibration compaction, avoiding vibration-induced air vibration or clamping failure due to creep.

[0017] 2. This pipe clamp fine-tuning structure, by setting an amplification module consisting of a spring and a receiving plate between the movable plate and the push rod, allows the top end of the push rod to slide back and forth in the shaft hole of the receiving plate and repeatedly compress and release the spring axially when the push rod moves axially and periodically. By designing the natural frequency of the spring to match the excitation frequency of the push rod, the spring generates a mechanical resonance phenomenon when subjected to periodic compression, amplifying the vibration amplitude at the push rod end before transmitting it to the movable plate. This significantly enhances the vibration energy transmitted to the bamboo and wood clamp and the movable plate, thereby further accelerating the creep process of the bamboo and wood material and improving the vibration compaction efficiency. Furthermore, during the vibration compaction process, when the bamboo and wood clamp and the movable plate become thinner due to material creep, the spring can adaptively extend by its own elastic potential energy, pushing the movable plate to closely follow the thickness change of the bamboo and wood clamp and the movable plate, passively compensating for the small displacement caused by material creep. It can maintain continuous and effective contact between the bamboo and wood clamp and the movable plate and the clamped object without relying on the active propulsion of the drive motor, simplifying the control logic while improving the overall response speed of the system.

[0018] 3. This pipe clamp fine-tuning structure uses an airbag pre-filled with fluid medium, fixedly installed between the movable plate and the receiving plate. When the axial vibration of the push rod is transmitted through the receiving plate and spring, the airbag utilizes the hydrostatic pressure characteristics of its internal fluid medium to evenly disperse and couple the point-like or localized mechanical vibrations to the entire back of the movable plate. This avoids the problem of insufficient creep in local areas of the bamboo / wood clamp and movable plate due to uneven force distribution, ensuring the consistency and uniformity of the overall creep of the bamboo / wood clamp and movable plate. Simultaneously, the internal cavity of the airbag is connected to an indicator with a built-in indicator plate. During the initial rapid creep of the bamboo / wood clamp and movable plate in the clamping and vibration stages, the pressure inside the airbag changes rapidly in one direction, causing a large range of displacement fluctuations in the indicator plate. As the creep rate gradually slows down, the pressure inside the airbag... The average rate of change of pressure also decreases accordingly. When the bamboo and wood plywood and movable plate reach a creep stabilization state and the thickness no longer decreases, the average pressure inside the airbag tends to be constant, and the reciprocating movement range of the indicator plate no longer drifts unidirectionally and tends to be stable. The operator only needs to observe whether the reciprocating movement range of the indicator plate no longer changes and remains unchanged for more than the preset time to intuitively and accurately determine whether the creep process is complete. This judgment method determines the creep endpoint by sensing whether the average pressure of the airbag continues to change unidirectionally, rather than relying on reading the absolute value of the airbag pressure. Therefore, it is not affected by the specific creep variation of different batches of bamboo and wood materials, has high versatility, and the entire judgment process is entirely achieved by a purely mechanical structure without the need for electronic sensors. The structure is simple, reliable, and inexpensive. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the pipe clamp fine-tuning structure in this invention; Figure 2This is a front view of the pipe clamp fine-tuning structure in this invention; Figure 3 This is a right view of the pipe clamp fine-tuning structure in this invention; Figure 4 This is a left view of the pipe clamp fine-tuning structure in this invention; Figure 5 This is a schematic diagram of the internal structure of the movable seat of the fine-tuning structure of the pipe clamp in this invention; Figure 6 This is a cross-sectional view of the movable plate structure of the fine-tuning structure of the pipe clamp in this invention; Figure 7 This is a schematic diagram of the indicator structure of the pipe clamp fine-tuning structure in this invention; Figure 8 This is a schematic diagram of the movement of the indicator plate structure in the fine-tuning structure of the pipe clamp in this invention; Figure 9 This is a three-dimensional structural diagram of the movable plate of the fine-tuning structure of the pipe clamp in this invention.

[0020] In the diagram: 1. Conduit; 2. Fixed seat; 21. Clamping plate; 3. Movable seat; 31. Reducer; 32. Sliding hole; 33. Mounting hole; 34. Locking plate; 4. Drive motor; 41. Battery control module; 42. Control switch; 5. Movable plate; 51. Sliding groove; 6. Push rod; 61. Drive sleeve; 7. Spring; 8. Support plate; 81. Shaft hole; 9. Airbag; 91. Indicator; 92. Indicator plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1

[0023] Please see Figures 1-5A pipe clamp fine-tuning structure includes a conduit 1, a fixed seat 2 fixedly mounted on the top of the conduit 1, and a movable seat 3 slidably mounted on the conduit 1. The conduit 1 is an axially extending elongated guide. The fixed seat 2 is fixedly mounted on the top of the conduit 1 by welding or fasteners. The movable seat 3 is slidably fitted onto the conduit 1 by a sliding sleeve. The movable seat 3 can be manually adjusted in position along the axial direction of the conduit 1. A clamping plate 21 made of bamboo or wood is fixedly mounted on the lower end face of the fixed seat 2. The clamping plate 21 has a flat structure and is secured by countersunk screws or adhesive. The clamping plate 21 is fixed to the lower end face of the fixed base 2, with its clamping surface facing the movable base 3. A movable plate 5 made of bamboo or wood is slidably mounted on the upper end face of the movable base 3 along the axial direction of the guide tube 1. The movable plate 5 is axially slidably mounted by cooperating with the guide block on the movable base 3 through a guide groove. The movable plate 5 can move up and down along the axial direction of the guide tube 1 on the upper end face of the movable base 3. A drive motor 4, which drives the axial lifting and lowering of the movable plate 5, is also fixedly mounted inside the movable base 3. The drive motor 4 is a stepper motor or a servo motor, and is fixedly mounted on the movable base 3 via a motor mount. Inside the mounting cavity of seat 3, a push rod 6, which is driven by a drive motor 4, is fixedly connected to the lower part of the movable plate 5. The upper end of the push rod 6 is fixedly connected to the lower surface of the movable plate 5 by threads or clips, and the lower end of the push rod 6 is connected to the drive motor 4. When the movable plate 5 contacts the object to be clamped and reaches the preset clamping force, the drive motor 4 drives the push rod 6 to perform axial periodic lifting and lowering, causing the movable plate 5 to vibrate and accelerate the creep of the movable plate 5. The preset clamping force is determined by the current threshold of the drive motor 4. When the current of the drive motor 4 reaches the preset threshold, the clamping force is confirmed. When the pressure between the movable plate 5 and the clamped object reaches the target value, the control mode of the drive motor 4 switches from continuous propulsion to vibration mode. Driven by the drive motor 4, the push rod 6 performs high-frequency reciprocating motion along the axial direction, causing the movable plate 5 to vibrate slightly in the axial direction. This vibration excites the micro-slippage and void compression of the fiber structure within the bamboo and wood material on the movable plate 5. The initial irreversible creep of the bamboo and wood material is rapidly completed during the vibration process, and the thickness of the movable plate 5 tends to stabilize, thus eliminating the potential for clamping force attenuation caused by the creep of the bamboo and wood material itself during long-term clamping. The bamboo and wood materials used in the clamping plate 21 and the movable plate 5 can be any one of bamboo laminated timber, reconstituted bamboo, or bamboo-plastic composite materials. Reconstituted bamboo is preferred, made from bamboo bundles or bamboo fibers through processes such as loosening, drying, resin impregnation, drying, laying, hot-pressing curing, and cutting. The bamboo bundles are randomly interlaced during laying, and after hot-pressing curing, a dense board with uniform mechanical properties is formed. The disordered distribution of its internal fibers effectively avoids splitting along the grain, and it has high density, hardness, and excellent wear resistance. The bamboo and wood surfaces of the plywood 21 and movable board 5 can be sanded or polished and coated with tung oil, raw lacquer or polyurethane varnish for sealing and protection, which slows down the moisture absorption rate and reduces creep rate fluctuations while retaining the friction characteristics of the bamboo and wood surface.

[0024] Please see Figures 1-5The push rod 6 is a lead screw structure, with a trapezoidal or rectangular thread. A drive sleeve 61, which drives its rotation and lifting, is coaxially mounted on the push rod 6. The inner hole of the drive sleeve 61 has an internal thread that mates with the external thread of the push rod 6. The drive sleeve 61 is installed inside the movable seat 3 and rotatably connected to it. The drive sleeve 61 is rotatably connected to the movable seat 3 via a rolling bearing or a sliding bearing. The drive sleeve 61 can rotate freely relative to the movable seat 3 but cannot move axially. The drive sleeve 61 also has meshing teeth machined on its outer circumference. The gear has a spur or helical gear structure, with meshing teeth for meshing with the output end of the reducer 31. The reducer 31 is also fixedly installed inside the movable seat 3. The reducer 31 is a planetary gear reducer 31 or a worm gear reducer 31. The reducer 31 is fixedly installed inside the movable seat 3 by bolts. The output end of the reducer 31 meshes with the meshing teeth for transmission. A gear is installed at the output end of the reducer 31. This gear directly meshes with the meshing teeth on the drive sleeve 61. The input end of the reducer 31 is connected to the drive motor 4 for transmission. The input end of the reducer 31 is connected to the output shaft of the drive motor 4 through a coupling or key. The top of the movable seat 3 has a sliding hole 32. The push rod 6 is coaxially and movably installed in the sliding hole 32. The sliding hole 32 is a through hole that penetrates the top wall of the movable seat 3. The inner diameter of the sliding hole 32 is slightly larger than the outer diameter of the push rod 6. The outer wall of the push rod 6 and the inner wall of the sliding hole 32 are clearance fit. The push rod 6 can slide freely along the axis in the sliding hole 32. The movable seat 3 also has a mounting hole 33. The mounting hole 33 is a stepped hole coaxial with the sliding hole 32. The drive sleeve 61 is coaxially and rotatably installed on the mounting hole 33. The outer wall of the drive sleeve 61 and the inner wall of the mounting hole 33 are fitted by a bearing. The end face of the mounting hole 33 is provided with a bearing seat to axially limit the drive sleeve 61.

[0025] Please see Figures 1-5A locking plate 34 is installed between the movable seat 3 and the guide tube 1. The locking plate 34 is an eccentric cam handle or a wedge-type locking block. The locking plate 34 is hinged to the movable seat 3. When the locking plate 34 is moved, the locking plate 34 presses against the outer wall of the guide tube 1, and uses friction to lock the movable seat 3 in a certain position on the guide tube 1. A battery control module 41 that provides power and control for the drive motor 4 is also fixedly installed inside the movable seat 3. The battery control module 41 includes a rechargeable lithium battery pack and a control circuit board. The control circuit board integrates a motor drive chip and a microcontroller. The battery control module 41 is fixedly installed in the battery compartment inside the movable seat 3. The battery control module 41 is electrically connected to the drive motor 4 through a wire. A control switch 42 that is electrically connected to the drive motor 4 and the battery control module 41 is provided on the side of the movable seat 3. The control switch 42 is a push-button or touch switch. The control switch 42 is used to start and stop the drive motor 4 and switch the vibration mode. The reducer 31 has a self-locking function. When the reducer 31 adopts a worm gear reducer 31, it achieves self-locking by utilizing the worm lead angle being less than the equivalent friction angle. When the drive motor 4 stops rotating, the self-locking of the reducer 31 and the thread self-locking of the push rod 6 lead screw structure together form a double self-locking, preventing the movable plate 5 from retracting due to reaction force after clamping.

[0026] Please see Figures 1-5 An amplification module for amplifying the vibration of the movable plate 5 is also provided between the movable plate 5 and the push rod 6. The amplification module includes a spring 7 and a receiving plate 8. The receiving plate 8 is assembled at the bottom of the movable plate 5 and has a disc-shaped or rectangular plate structure. The upper surface of the receiving plate 8 is in contact with the lower surface of the movable plate 5, and the bottom of the receiving plate 8 is machined with a shaft hole 81 for installing the spring 7. The shaft hole 81 is a blind hole, and the axis of the shaft hole 81 coincides with the axis of the push rod 6. The top of the spring 7 is fixedly connected to the receiving plate 8. The top of the spring 7 is fixed to the top of the shaft hole 81 by welding, snap ring, or pressure plate. The push rod 6 is coaxially inserted into the shaft hole 81 and slidably connected to the shaft hole 81. The top of the push rod 6 is round. The column segment and the inner wall of the shaft hole 81 are clearance fit. The top of the push rod 6 can slide axially within the shaft hole 81. When the push rod 6 performs axial periodic lifting and lowering, it axially compresses the spring 7 and amplifies the vibration amplitude generated by the movable plate 5 during the elastic deformation process. When the top of the push rod 6 moves upward, it compresses the spring 7 and stores elastic force. When the push rod 6 moves downward, the spring 7 releases elastic force to push the receiving plate 8 and the movable plate 5 upward. By matching the natural frequency of the spring 7 with the vibration frequency of the push rod 6, the spring 7 generates mechanical resonance. The vibration amplitude at the end of the receiving plate 8 is greater than the amplitude at the top of the push rod 6, thereby amplifying the vibration energy transmitted to the movable plate 5.

[0027] Please see Figures 1-5The core of this application lies in utilizing mechanical vibration to actively accelerate the initial creep of bamboo and wood materials, thereby solving the problem of clamping force attenuation during long-term clamping. In use, the movable seat 3 is first slid along the guide tube 1 to the position corresponding to the object being clamped. The locking piece 34 completes the initial locking between the movable seat 3 and the guide tube 1. The control switch 42 is then activated to start the equipment. The battery control module 41 supplies power to the drive motor 4. The torque output by the drive motor 4 is reduced and amplified by the reducer 31, and then drives the drive sleeve 61, coaxially mounted on the push rod 6, to rotate through meshing teeth. This, in turn, drives the push rod 6, a lead screw structure, to move axially up and down along the sliding hole 32 of the movable seat 3. During the upward movement of the push rod 6, it pushes the movable plate 5 upward axially until the movable plate 5 and the bamboo and wood clamping plate 21 on the lower end face of the fixed seat 2 together clamp the object and reach the preset clamping force. Once the movable plate 5 contacts the object and reaches the preset initial clamping force, the control mode of the drive motor 4 switches. It no longer performs continuous constant displacement propulsion, but instead drives the push rod 6 to produce a periodic axial reciprocating up and down motion. This axial periodic lifting and lowering is directly transmitted to the movable plate 5 via the push rod 6, causing the movable plate 5 to generate high-frequency, micro-amplitude axial vibration. Under continuous micro-vibration excitation, the static friction between the internal fiber structures of the bamboo and wood material on the movable plate 5 is overcome, and the fiber slippage and void collapse processes are accelerated. This allows the bamboo and wood plywood 21 and the movable plate 5 to quickly complete most of the creep deformation in the initial clamping stage, thereby achieving a relatively stable material size in a very short time. This effectively prevents the continuous attenuation of clamping force due to the material's own creep during subsequent long-term use. If the bamboo and wood plywood 21 and the movable plate 5 creep during vibration, and the thickness continues to shrink, the contact stress between the bamboo and wood plywood 21 and the movable plate 5 and the clamped object decreases. The drive motor 4 senses the change in contact stress in real time. For example, by detecting the decrease in motor current, it is determined that the bamboo and wood plywood 21 and the movable plate 5 have creeped. Then, while maintaining vibration, the drive motor 4 will slightly advance the vibration center of the push rod 6 towards the clamped object, causing the movable plate 5 to press the clamped object again and restore the preset contact stress. As creep continues, this process cycles continuously. The drive motor 4 constantly fine-tunes the position of the vibration center, ensuring that the movable plate 5 always maintains a preset clamping force to tightly adhere to the object being clamped, until the bamboo and wood clamping plate 21 and the movable plate 5 stop creeping and the contact stress no longer decreases. At this point, the drive motor 4 stops vibrating, performs a final end-tightening, and then the power is cut off and the plate is locked.

[0028] Please see Figures 1-5During clamping, creep occurs simultaneously on both the bamboo and wood clamping plate 21 and the movable plate 5. Since the object being clamped is held between the movable plate 5 and the clamping plate 21 at the lower end of the fixed base 2, when the movable plate 5 applies an upward clamping force under the action of the drive motor 4 and the push rod 6, the upper surface of the object being clamped also exerts a counterforce of the same magnitude on the clamping plate 21 at the lower end of the fixed base 2. Therefore, the clamping plate 21 at the lower end of the fixed base 2, as a clamping surface also made of bamboo and wood, will also undergo slow microscopic slippage and rearrangement of its internal fiber structure under continuous compressive stress, producing irreversible creep deformation similar to that of the movable plate 5. This manifests as a continuous reduction in the thickness of the clamping plate 21 at the lower end of the fixed base 2. The total creep of the entire clamping system is the sum of the creep of the movable plate 5 and the creep of the clamping plate 21 at the lower end of the fixed base 2. The creep deformation of the bamboo and wood materials on both sides will jointly lead to a decrease in the clamping force. In this application, the decrease in contact stress detected by the drive motor 4 during vibration is actually the combined effect of the creep superposition of the movable plate 5 and the lower clamping plate 21 of the fixed seat 2. When the drive motor 4 pushes the vibration center of the push rod 6 toward the object being clamped through the adaptive following and tightening function, the amount of displacement compensated also covers the sum of the creep thinning of the bamboo and wood materials on both sides. This ensures that the clamping system composed of the movable plate 5 and the lower clamping plate 21 of the fixed seat 2 can maintain a constant preset clamping force and will not cause clamping failure due to the creep of bamboo and wood materials on one or both sides.

[0029] Please see Figure 5 as well as Figure 6 To further enhance the vibration effect and compensate for creep displacement, an amplification module is installed between the movable plate 5 and the push rod 6. This amplification module includes a spring 7 and a receiving plate 8. When the push rod 6 performs axial periodic lifting and lowering, its top end slides back and forth within the shaft hole 81 of the receiving plate 8, axially compressing and releasing the spring 7 repeatedly. By designing the natural frequency of the spring 7 to match or be close to the excitation frequency of the push rod 6, the spring 7 will generate a mechanical resonance phenomenon when subjected to periodic compression, amplifying the vibration amplitude at its end several times before transmitting it to the movable plate 5. This significantly enhances the vibration energy transmitted to the bamboo and wood plywood 21 and the movable plate 5, accelerating the creep process. Simultaneously, during the vibration compaction process, if the bamboo and wood plywood 21 and the movable plate 5 experience creep thinning, the spring 7 will adaptively elongate using its own elastic potential energy, pushing the movable plate 5 to closely follow the thickness changes of the bamboo and wood plywood 21 and the movable plate 5, passively compensating for the small displacement caused by material creep, and ensuring continuous and effective contact between the bamboo and wood plywood 21 and the movable plate 5 and the clamped object during vibration.

[0030] Example 2

[0031] Please see Figures 6-9The amplification module also includes an airbag 9 that bears the axial pressure of the movable plate 5. The airbag 9 is an annular or bladder-shaped elastic seal. The airbag 9 is pre-filled with a fluid medium. The airbag 9 is fixedly installed between the movable plate 5 and the receiving plate 8. The airbag 9 is compressed when the movable plate 5 comes into contact with the object being clamped. The upper and lower end faces of the airbag 9 are fixed to the lower surface of the movable plate 5 and the upper surface of the receiving plate 8 by adhesive or vulcanization, respectively. The axial vibration generated by the push rod 6 on the receiving plate 8 through periodic lifting and lowering is evenly distributed to the movable plate 5 through the airbag 9. The fluid medium inside the airbag 9 converts the local point pressure transmitted by the receiving plate 8 into a uniform surface pressure acting on the back of the movable plate 5 according to the hydrostatic pressure principle, so that the vibration energy is evenly distributed. The internal cavity of the airbag 9 is connected to an indicator 91 with a built-in indicator plate 92. The indicator 91 is connected to the internal cavity of the airbag 9 via a thin conduit 1. The outer shell of the indicator 91 is transparent or has a window structure. The outer surface of the indicator 91 is provided with at least two sets of scales. The indicator plate 92 can generate corresponding axial displacement according to the pressure change inside the airbag 9. One side of the indicator plate 92 bears the internal pressure of the airbag 9, and the other side bears atmospheric pressure or the force of the spring 7. Under the action of pressure difference, it moves axially. During the process of the push rod 6 driving the movable plate 5 to vibrate, when the displacement range of the indicator plate 92 stabilizes and no longer expands, it indicates that the clamping surface of the movable plate 5 has reached the creep stabilization state. At this time, the average pressure inside the airbag 9 no longer changes unidirectionally, and the indicator plate 92 only swings back and forth around a fixed range. The operator can judge that the creep is complete by this. The indicator 91 is fixedly installed on the side of the movable plate 5. The indicator 91 is fixed to the side wall of the movable plate 5 by bracket, clip, or adhesive, so as to facilitate the operator's observation. The bottom surface of the movable plate 5 is machined with a sliding groove 51, which is a rectangular annular groove or a circular recess. The receiving plate 8 is slidably assembled in the sliding groove 51, and the edge of the receiving plate 8 is clearance-fitted with the inner sidewall of the sliding groove 51. The receiving plate 8 can slide slightly axially within the sliding groove 51. One end of the airbag 9 is fixedly connected to the sliding groove 51, and one end of the airbag 9 is glued to the top surface inside the sliding groove 51. The other end of the airbag 9 is fixedly connected to the receiving plate 8, and the other end of the airbag 9 is glued to the upper surface of the receiving plate 8. The fluid medium pre-filled inside the airbag 9 is either gas or liquid. When gas is used, the airbag 9 has greater compressibility; when liquid is used, the pressure transmission is more direct.

[0032] Please see Figures 6-9Based on Embodiment 1, to optimize the vibration transmission quality and intuitively determine the creep state, the amplification module also includes an airbag 9 and an indicator 91 with a built-in indicator plate 92. The airbag 9 is fixedly installed between the movable plate 5 and the receiving plate 8, and its interior is pre-filled with a fluid medium such as gas or liquid. When the axial vibration of the push rod 6 is transmitted through the receiving plate 8 and the spring 7, the airbag 9, as a hydrostatic pressure transmission layer, evenly disperses and couples the point-like or local mechanical vibrations to the entire back of the movable plate 5, avoiding the problem of insufficient creep in the bamboo and wood plywood 21 and the movable plate 5 due to uneven force. Furthermore, the indicator function of the airbag 9 can also solve the problem of difficulty in determining the endpoint caused by the difference in creep characteristics of different batches of bamboo and wood materials. In the initial stage of clamping and vibration, the bamboo and wood plywood 21 and the movable plate 5 creep rapidly, and the internal pressure of the airbag 9 drops rapidly due to continuous compression. The indicator plate 92 in the indicator 91, which is connected to the internal cavity of the airbag 9, will generate a large range of displacement fluctuations when creep occurs. As the creep process progresses, the deformation rate of the bamboo and wood plywood 21 and the movable plate 5 gradually slows down, and the average rate of change of the internal pressure of the airbag 9 also decreases. When the bamboo and wood plywood 21 and the movable plate 5 reach a creep stabilization state, their thickness no longer decreases, and the average pressure inside the airbag 9 tends to be constant. However, due to the continuous axial cyclic rise and fall of the push rod 6, the internal pressure of the airbag 9 will still fluctuate within a stable range. At this time, the reciprocating movement range of the indicator 92 in the indicator 91 connected to the airbag 9 no longer drifts unidirectionally and tends to stabilize. The operator only needs to observe that the reciprocating movement range of the indicator 92 no longer changes and remains unchanged for more than a preset time to determine that the bamboo and wood plywood 21 and the movable plate 5 have completed the creep acceleration process. This method of determining whether the creep is complete is based on sensing whether the average pressure of the airbag 9 continues to change unidirectionally. It is not affected by the creep variation of the specific bamboo and wood materials and has high versatility. After the judgment is completed, the drive motor 4 stops vibrating and performs a final tightening operation before power is cut off and locked, thus completing the entire clamping process.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipe clamp fine-tuning structure, comprising a conduit (1) and a fixed seat (2) fixedly mounted on the top of the conduit (1) and a movable seat (3) slidably mounted on the conduit (1), characterized in that: A clamping plate (21) made of bamboo and wood is fixedly installed on the lower end face of the fixed seat (2), while a movable plate (5) made of bamboo and wood is slidably installed on the upper end face of the movable seat (3) along the axial direction of the guide tube (1). A drive motor (4) for driving the movable plate (5) to move axially is also fixedly installed inside the movable seat (3). A push rod (6) connected to the drive motor (4) is fixedly connected below the movable plate (5). When the movable plate (5) contacts the object to be clamped and reaches the preset clamping force, the drive motor (4) drives the push rod (6) to generate axial periodic lifting and lowering, causing the movable plate (5) to vibrate and accelerate the creep of the movable plate (5).

2. The pipe clamp fine-tuning structure according to claim 1, characterized in that: An amplification module for amplifying the vibration of the movable plate (5) is also provided between the movable plate (5) and the push rod (6). The amplification module includes a spring (7) and a receiving plate (8). The receiving plate (8) is assembled at the bottom of the movable plate (5), and the bottom of the receiving plate (8) is machined with a shaft hole (81) for installing the spring (7). The top of the spring (7) is fixedly connected to the receiving plate (8). The push rod (6) is coaxially inserted into the shaft hole (81) and slidably connected to the shaft hole (81). When the push rod (6) generates axial periodic lifting and lowering, it axially compresses the spring (7) and amplifies the vibration amplitude generated by the movable plate (5) during the elastic deformation process.

3. The pipe clamp fine-tuning structure according to claim 2, characterized in that: The amplification module also includes an airbag (9) that bears the axial pressure of the movable plate (5). The airbag (9) is pre-filled with a fluid medium. The airbag (9) is fixedly installed between the movable plate (5) and the receiving plate (8). The airbag (9) is compressed when the movable plate (5) comes into contact with the object being clamped. The axial vibration generated by the push rod (6) on the receiving plate (8) through periodic lifting and lowering is evenly distributed to the movable plate (5) through the airbag (9).

4. The pipe clamp fine-tuning structure according to claim 3, characterized in that: The internal cavity of the airbag (9) is connected to an indicator (91) with a built-in indicator (92). The outer surface of the indicator (91) is provided with at least two sets of scales. The indicator (92) can generate a corresponding axial displacement as the pressure inside the airbag (9) changes.

5. The pipe clamp fine-tuning structure according to claim 4, characterized in that: The indicator (91) is fixedly installed on the side of the movable plate (5).

6. The pipe clamp fine-tuning structure according to claim 3, characterized in that: The bottom surface of the movable plate (5) is machined with a sliding groove (51), the receiving plate (8) is slidably assembled in the sliding groove (51), and one end of the airbag (9) is fixedly connected to the sliding groove (51), and the other end of the airbag (9) is fixedly connected to the receiving plate (8).

7. The pipe clamp fine-tuning structure according to claim 1, characterized in that: The push rod (6) is a lead screw structure, and a drive sleeve (61) for driving its rotation and lifting is coaxially mounted on the push rod (6). The drive sleeve (61) is installed inside the movable seat (3) and rotatably connected to the movable seat (3). The drive sleeve (61) is also machined with meshing teeth. A reducer (31) is also fixedly installed inside the movable seat (3). The output end of the reducer (31) meshes with the meshing teeth for transmission, while the input end of the reducer (31) is connected to the drive motor (4) for transmission.

8. The pipe clamp fine-tuning structure according to claim 1, characterized in that: A locking piece (34) is fitted between the movable seat (3) and the conduit (1). A battery control module (41) that provides power and control to the drive motor (4) is also fixedly installed inside the movable seat (3). The battery control module (41) is electrically connected to the drive motor (4), and a control switch (42) that is electrically connected to the drive motor (4) and the battery control module (41) is provided on the side of the movable seat (3).

9. The pipe clamp fine-tuning structure according to claim 7, characterized in that: The reducer (31) has a self-locking function.

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