Five-axis measuring seat mechanism with follow-up balancing function

Abstract

This invention discloses a five-axis measuring base mechanism with follow-up balancing function, belonging to the field of testing technology. It includes a rotating base, with an output shaft rotatably connected to one side of the rotating base. One end of the output shaft extends to the outside of the rotating base and is fixedly connected to a connecting frame. It also includes a probe fixing end, the top of which is fixedly connected to the end of the connecting frame away from the rotating base. In this invention, a second motor drives the output shaft, connecting frame, probe fixing end, and driving gear to rotate, adjusting the operating angle of the test head. Simultaneously, a driven gear drives the connecting base and counterweight to rotate in the opposite direction relative to the driving gear via a hollow shaft. This ensures that the connecting base and counterweight always rotate in the opposite direction to the connecting frame and probe fixing end, thus counteracting the inertial torque generated by the swinging of the connecting frame and probe fixing end in real time. Through the follow-up balancing adjustment of the test head by the connecting base and counterweight, the overall center of mass of the entire motion system always falls on the axis of the output shaft, ensuring the stability of the testing process.

Description

Technical Field

[0001] This invention belongs to the field of testing technology, and in particular relates to a five-axis measuring base mechanism with follow-up balancing function. Background Technology

[0002] In modern manufacturing, precision scientific research experiments, and high-precision metrology and testing, the testing and measurement of various irregular parts and precision components are becoming increasingly frequent. This places stringent demands on the accuracy, stability, adaptability, and ease of operation of testing equipment. Among these, multi-axis testing equipment used for external load testing not only needs to achieve flexible attitude control of the test head in multiple spatial degrees of freedom to complete comprehensive, blind-spot-free testing of complex test parts, but also needs to maintain stable operation of the entire machine during high-speed motion, reciprocating swing, and frequent reversals. This is crucial to prevent test data distortion and poor repeatability caused by mechanical shaking, attitude deviation, and vibration interference, thus providing a true and reliable original basis for product quality judgment, process optimization, and scientific research data analysis. This has become a key technical pain point and core development need in the field of high-end precision testing equipment.

[0003] For example, Chinese patent document (CN121297755A) describes a coordinate measuring machine based on irregular surface measurement. The upper working surface of the worktable is used to support the workpiece to be measured. The measuring mechanism is set on a moving gantry, which moves on the worktable. The measuring mechanism measures the workpiece. The measuring head of the measuring mechanism is set at the front end of the first moving component, and a first airbag pusher is set at the rear end of the first moving component. The inflation and deflation of the first airbag pusher realizes the axial pivoting movement in sync with the front end measuring head. The second moving component is located above the first moving component. The pivoting movement of the first and second moving components drives the movement of the measuring head in the entire spatial direction to form a full-angle scanning measurement of the workpiece by the measuring head.

[0004] However, during the use of this device, when the side head swings back and forth, starts and stops, and reverses, its own eccentric mass will generate significant alternating inertial torque and impact load, which can easily cause the whole machine to vibrate, the shaft system to wobble, and dynamic positioning deviation, leading to impact, shaking, and shaft fatigue. After long-term use, it will cause the test head to drift and the positioning accuracy to decrease, directly affecting the measurement effect of the device. Therefore, improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to address the problem that, in the prior art, the side head component generates significant alternating inertial torque and impact load due to its eccentric mass during reciprocating swing, start-stop, and reversing movements. This leads to test head attitude drift and decreased positioning accuracy after prolonged use, directly affecting the measurement effect of the device. Therefore, this invention proposes a five-axis measuring base mechanism with follow-up balancing function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A five-axis measuring base mechanism with follow-up balancing function includes a rotating base, an output shaft rotatably connected to one side of the interior of the rotating base, one end of the output shaft extending to the outside of the rotating base and fixedly connected to a connecting frame, and further includes: The probe is fixed at one end, with its top end fixedly connected to the end of the connecting frame furthest from the rotating seat. The follow-up balancing assembly includes a hollow shaft rotatably connected inside a rotating base via a support base. A gear unit is provided at one end of the hollow shaft, and a connecting seat is provided between the gear unit and the support base. A counterweight is slidably connected inside the connecting seat, which is used to perform follow-up balancing on the inertial forces of the rotating base and the connecting frame through the connecting seat and the counterweight.

[0007] As a further description of the above technical solution: The gear unit includes: Driven gear, fixedly connected to the outer circumference of hollow shaft; The driving gear is meshed with the driven gear on one side, and the driving gear is fixedly connected to the outer periphery of the output shaft.

[0008] As a further description of the above technical solution: The support base is internally provided with a parallel adjustment assembly, which includes: The rotating shaft is rotatably connected inside the support base, and one end of the rotating shaft extends sequentially to the outside of the support base and the rotating base and is fixedly connected to the handle; The driving pulley is fixedly connected to the outer periphery of the rotating shaft, and the driven pulley is connected to the outer periphery of the driving pulley via a synchronous belt drive. The driven pulley is fixedly connected to a connecting shaft, which is rotatably connected to the support base and the hollow shaft.

[0009] As a further description of the above technical solution: The parallel adjustment component further includes: The first bevel gear is located inside the hollow shaft and is fixedly connected to the outer circumference of the connecting shaft; The second bevel gear is meshed with the bottom side of the first bevel gear, and a lead screw is fixedly connected inside the second bevel gear. The bottom end of the lead screw extends into the connecting seat and is connected to the first lead screw sleeve. The bottom end of the first lead screw sleeve is fixedly connected to the top of the counterweight. The lead screw is rotatably connected to the hollow shaft and the connecting seat.

[0010] As a further description of the above technical solution: The connecting seat is internally provided with a damping component, which includes: A connecting plate is sleeved on the outer periphery of the first lead screw sleeve, and a first cone block is fixedly connected to both sides of the bottom of the connecting plate. The connecting plate is slidably connected inside the connecting seat. The inclined surface of the second cone block is in contact with the inclined surface of the first cone block; The vertical plate is fixedly connected to the side of the second cone block away from the first cone block.

[0011] As a further description of the above technical solution: The damping component also includes: Four first springs are symmetrically installed in pairs on one side of the vertical plate, with the first springs positioned away from the second cone block.

[0012] As a further description of the above technical solution: The damping component also includes: Four movable damping plates are symmetrically installed in pairs on the side of the vertical plate away from the first spring. On the same side, two movable damping plates are provided with fixed damping plates on the side away from the vertical plate. The other side of the fixed damping plates is fixedly connected to the outer wall of the counterweight block.

[0013] As a further description of the above technical solution: Also includes: The mounting bracket is located inside the top side of the rotating seat, and one bottom side of the mounting bracket is fixedly connected to the top of the support seat; The second motor is fixedly connected to one side of the mounting bracket, and one end of the output shaft of the second motor is fixedly connected to the end of the output shaft away from the mounting bracket through a flexible coupling; The fixed seat is rotatably connected to the outer periphery of the top of the rotating seat via a bearing. Top mount, fixedly connected to the top of the mounting base; The first motor is fixedly connected to the bottom of the top seat through a limiting seat, and one end of the output shaft of the first motor is connected to a rotating shaft through a coupling. The rotating shaft is rotatably connected to the outer periphery of the fixed seat, and the bottom of the rotating shaft is fixedly connected to the rotating seat and the top of the mounting bracket.

[0014] As a further description of the above technical solution: The connecting frame is equipped with a separation vibration isolation component, which includes: An annular rubber layer is disposed inside the connecting frame, and the inner circumference of the annular rubber layer is sleeved on the probe fixing end. The annular rubber layer has multiple circular through holes arranged in a circular array inside. A distribution plate is installed inside the connecting frame and is located above the annular rubber layer. One side of the distribution plate is connected to a flow channel through an infusion tube. The flow channel is located inside the connecting frame and the output shaft. A sealing slip ring is connected to the outer periphery of the output shaft through a through hole. The sealing slip ring is sleeved on the outer periphery of the output shaft. A limit box is installed on one side of the sealing slip ring through a connecting tube. The top of the limit box is fixedly connected to the bottom of the horizontal plate. A liquid bladder is installed inside the limiting box, with its top fixedly connected to the bottom of the horizontal plate. One side of the liquid bladder is connected to a connecting pipe, and a sliding plate is fixedly connected to the bottom of the liquid bladder. The sliding plate is slidably connected inside the limiting box, and a second lead screw sleeve is fixedly connected to the bottom of the sliding plate. A reciprocating lead screw is driven and connected to the bottom side of the second lead screw sleeve. The reciprocating lead screw consists of two threaded grooves with the same pitch but opposite directions. The bottom end of the reciprocating lead screw extends to the bottom of the limiting box and is fixedly connected to a third bevel gear. The reciprocating lead screw is rotatably connected inside the limiting box, and a fourth bevel gear is meshed with one side of the third bevel gear. The fourth bevel gear is fixedly connected to the outer periphery of the output shaft.

[0015] As a further description of the above technical solution: The isolation vibration isolation assembly also includes: The bottom of the equalizing disk has multiple pipes arranged in a circular array. The bottom end of each pipe is connected to a cavity, which is located inside the connecting frame. A sealing slider and a piston are slidably sealed on one side of the cavity. A second spring is fixedly connected to the side of the piston away from the sealing slider. A guide rod is fixedly connected to the other side of the second spring. The other end of the guide rod passes through a circular through hole and is provided with a limit hole, which is located on the top side inside the probe fixing end.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, the second motor drives the connecting frame, the probe fixing end, and the driving gear to rotate via the output shaft, adjusting the operating angle of the test head. Simultaneously, the driven gear drives the connecting seat and the counterweight to rotate in the opposite direction relative to the driving gear via the hollow shaft. This ensures that the connecting seat and the counterweight always maintain a counter-rotating motion with the connecting frame and the probe fixing end, thus counteracting the inertial torque generated by the swinging of the connecting frame and the probe fixing end in real time. Through the follow-up balance adjustment of the test head by the connecting seat and the counterweight, the center of mass position of the entire motion system can be dynamically adjusted, ensuring that the overall center of mass of the system always falls precisely on the central axis of the output shaft. This effectively avoids problems such as overall equipment shaking, test head offset, and increased operating noise caused by inertial torque, significantly improving the stability of the testing process and ensuring that the test head always maintains precise positioning during movement, further guaranteeing the stability and accuracy of the test data.

[0017] 2. In this invention, the operator manually operates the handle to drive the rotating shaft and the driving pulley to rotate. The driven pulley drives the first bevel gear, the second bevel gear, and the lead screw to rotate through the connecting shaft. This causes the first lead screw sleeve to move the counterweight away from the output shaft center, achieving continuous adjustment and precise positioning of the counterweight's eccentricity. This allows the product to flexibly match and finely adjust the system's balance force and dynamic compensation amount according to the installation requirements of test heads with different load specifications. This makes the overall balance capability highly adaptable to the load conditions, effectively improving the product's applicability and versatility in various testing scenarios.

[0018] 3. In this invention, the first lead screw sleeve synchronously drives the first conical blocks on both sides to move through the connecting plate, causing the second conical block to drive the vertical plate and the movable damping plate to move towards the fixed damping plate. As the counterweight and connecting plate are continuously adjusted, the damping force of the movable damping plate on the fixed damping plate increases. Through automatic adjustment of the damping force, the centrifugal vibration generated by the counterweight during eccentric rotation can be precisely suppressed, effectively absorbing vibration energy and preventing vibration from being transmitted to core components such as the test head and connecting frame. This prevents problems such as test head offset and test data distortion caused by vibration, while also reducing the wear and tear on the equipment's components and extending the equipment's service life. In addition, this damping adjustment structure can flexibly adapt to different eccentricity adjustment scenarios. No matter what eccentric position the counterweight is in, it can provide appropriate damping force, greatly improving the overall operational stability and testing effect of the equipment. This ensures that the equipment maintains a stable and accurate operating state during long-term, high-frequency testing, meeting the needs of various complex testing scenarios.

[0019] 4. In this invention, the mechanical linkage adaptive adjustment of the probe swing amplitude and the preload of the second spring is realized by synchronously driving the squeezing structure of the liquid bladder through the output shaft: the larger the swing angle, the greater the preload of the second spring and the higher the system stiffness; in conjunction with the main vibration isolation of the annular rubber layer, the device can effectively suppress resonance and lateral sway when swinging at high speed with large amplitude, and maintain good flexible vibration isolation characteristics when moving at low speed with small amplitude. It has rapid dynamic response and high motion synchronization, which significantly improves the running stability and measurement accuracy of the mechanism under different swing speeds and swing amplitudes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the fixed seat and the rotating seat in this invention; Figure 3 This is a three-dimensional structural diagram of the fixed base and rotating base from another perspective in this invention. Figure 4 In this invention Figure 3A magnified schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the overall three-dimensional structure of the follow-up balancing component, the probe fixing end, and the separation vibration isolation component in this invention; Figure 6 This is a partial three-dimensional structural diagram of the follow-up balancing component and the parallel adjustment component in this invention; Figure 7 This is a partial three-dimensional structural diagram of the counterweight, parallel adjustment assembly, and damping assembly in this invention; Figure 8 In this invention Figure 7 A magnified schematic diagram of the structure at point B; Figure 9 This is a partial three-dimensional structural diagram of the vibration isolation component in this invention; Figure 10 This is a schematic diagram of the structure of the separate vibration isolation component and the probe fixing end in this invention; Figure 11 In this invention Figure 10 A magnified structural diagram of point C.

[0021] Legend: 1. Top seat; 2. Fixed seat; 3. First motor; 4. Mounting bracket; 5. Second motor; 6. Output shaft; 7. Follow-up balancing assembly; 701. Driving gear; 702. Driven gear; 703. Hollow shaft; 704. Support seat; 705. Connecting seat; 706. Counterweight; 8. Parallel adjustment assembly; 801. Rotating shaft; 802. Driving pulley; 803. Driven pulley; 804. Connecting shaft; 805. First bevel gear; 806. Second bevel gear; 807. Lead screw; 808. First lead screw sleeve; 809. Rotary handle; 9. Damping assembly; 901. Connecting plate; 902. First cone block; 903. Second cone block; 9 04. Vertical plate; 905. First spring; 906. Movable damping plate; 907. Fixed damping plate; 10. Rotating seat; 11. Connecting frame; 12. Probe fixed end; 13. Separation vibration isolation assembly; 1301. Dividing plate; 1302. Infusion tube; 1303. Sealing slip ring; 1304. Connecting tube; 1305. Limiting box; 1306. Liquid bladder; 1307. Sliding plate; 1308. Second lead screw sleeve; 1309. Reciprocating lead screw; 1310. Third bevel gear; 1311. Fourth bevel gear; 1312. Sealing slider; 1313. Piston; 1314. Second spring; 1315. Guide rod; 1316. Annular rubber layer. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-8 The present invention provides a technical solution: a five-axis measuring base mechanism with follow-up balancing function, including a rotating base 10, an output shaft 6 rotatably connected to one side inside the rotating base 10, one end of the output shaft 6 extending to the outside of the rotating base 10 and fixedly connected to a connecting frame 11, and further including: The top end of the probe fixing end 12 is fixedly connected to the end of the connecting frame 11 away from the rotating seat 10. The bottom of the probe fixing end 12 is provided with an installation component. The probe fixing end 12 is T-shaped. The follow-up balancing component 7 includes a hollow shaft 703 rotatably connected to the inside of the rotating seat 10 via a support base 704. A gear unit is provided at one end of the hollow shaft 703. A connecting seat 705 is provided between the gear unit and the support base 704. A counterweight 706 is slidably connected inside the connecting seat 705. The connecting seat 705 and the counterweight 706 are made of carbon fiber composite material / high-strength aluminum alloy and are used to follow up and balance the inertial forces of the rotating seat 10 and the connecting frame 11 through the connecting seat 705 and the counterweight 706. The gear unit includes: Driven gear 702 is fixedly connected to the outer circumference of hollow shaft 703; The driving gear 701 is meshed with one side of the driven gear 702, and the driving gear 701 is fixedly connected to the outer periphery of the output shaft 6. Also includes: Mounting bracket 4 is located inside the top side of rotating seat 10, and one bottom side of mounting bracket 4 is fixedly connected to the top of support seat 704; The second motor 5 is fixedly connected to one side of the mounting bracket 4, and one end of the output shaft of the second motor 5 is fixedly connected to the end of the output shaft 6 away from the connecting bracket 11 through a flexible coupling. The fixed seat 2 is rotatably connected to the outer periphery of the top of the rotating seat 10 via a bearing; Top seat 1 is fixedly connected to the top of fixed seat 2; The first motor 3 is fixedly connected to the bottom of the top seat 1 through a limiting seat, and one end of the output shaft of the first motor 3 is connected to a rotating shaft through a coupling. The rotating shaft is rotatably connected to the outer periphery of the fixed seat 2, and the bottom of the rotating shaft is fixedly connected to the rotating seat 10 and the top of the mounting bracket 4.

[0024] The specific usage method and working principle are as follows: First, the top of the top seat 1 is rigidly fixed to the external X / Y / Z three-axis motion module by fastening screws to complete the reliable positioning of the whole machine installation benchmark. Then, the external test head is installed on the test head fixing end 12. The installation components set inside the test head fixing end 12 hold, center and prevent loosening of the test head to ensure that the test head does not loosen or move during high-speed movement and posture change. After the clamping is completed, the equipment can be started to enter the test preparation process. The external X / Y / Z three-axis module drives the top seat 1, fixed seat 2, rotating seat 10, connecting frame 11 and probe fixing end 12 to move smoothly in the X, Y and Z spatial directions, accurately moving the test head to the appropriate position on top of the external load. Then, the first motor 3 drives the rotating seat 10, connecting frame 11 and probe fixing end 12 to rotate, realizing the rapid switching and coarse adjustment of the test head's test position and orientation. The second motor 5 drives the output shaft 6, connecting frame 11 and probe fixing end 12 to perform pitch or yaw movements, completing the fine adjustment of the test head's working angle, so that the test head can complete the all-round test requirements of the external load in five-axis directions, ensuring the accuracy of the test data. Based on this, the output shaft 6 drives the driving gear 701 synchronously, causing the driven gear 702 to drive the hollow shaft 703 to rotate in the opposite direction relative to the driving gear 701 inside the support seat 704. Utilizing the linkage effect between the hollow shaft 703 and the connecting seat 705, the power is transmitted to the connecting seat 705, causing the connecting seat 705 to drive the counterweight 706 to rotate synchronously in the opposite direction. This ensures that the connecting seat 705 and the counterweight 706 always maintain the opposite rotation direction to the connecting frame 11 and the probe fixing end 12, thereby offsetting the inertial torque and eccentric torque generated by the connecting frame 11 and the probe fixing end 12 during swinging, reversing, and speed change. Through the follow-up balance adjustment of the test head by the connecting seat 705 and the counterweight 706, the total center of mass of the entire motion system always falls on the axis of the output shaft 6, fundamentally suppressing problems such as equipment vibration, frame shaking, test head positioning drift, and attitude deviation caused by inertial imbalance, and significantly improving the stability and attitude maintenance accuracy of the mechanism under dynamic working conditions. During this process, a weight sensor and an angular displacement encoder are installed on the probe fixing end 12 and the connecting frame 11, respectively. The weight sensor collects and feeds back the actual load weight and load change information of the test head in real time. The angular displacement encoder monitors the swing angle, rotation speed and motion phase in real time, and performs closed-loop calibration on the motion phase of the counterweight 706 to ensure that the counterweight 706 and the test head actuator always maintain a 180-degree phase difference. A center of mass sensor is installed on the counterweight 706 to monitor the center of mass position of the counterweight 706 in real time. All sensor data are connected to the controller to provide reliable data support for the controller's precise control. The driving power of this test head is provided by the external first motor 3 and second motor 5, and is transmitted into the test head through mechanical transmission structures such as the output shaft 6 and gear unit to realize the attitude adjustment and dynamic balance function of the test head, thereby minimizing the self-weight and motion inertia of the test head and improving the detection sensitivity of the device.

[0025] Please see Figure 3 , Figures 5-7 The support base 704 is internally provided with a parallel adjustment assembly 8, which includes: A rotating shaft 801 is rotatably connected inside the support base 704, and one end of the rotating shaft 801 extends sequentially to the outside of the support base 704 and the rotating base 10 and is fixedly connected to a handle 809. A limit unit is provided on the outer periphery of the rotating shaft 801 to limit and fix the position of the rotating shaft 801. A scale is provided on the outer periphery of the rotating shaft 801. The driving pulley 802 is fixedly connected to the outer periphery of the rotating shaft 801, and the driven pulley 803 is connected to the outer periphery of the driving pulley 802 via a synchronous belt drive. The driven pulley 803 is fixedly connected to the inside of the connecting shaft 804, which is rotatably connected to the support base 704 and the hollow shaft 703. The driving pulley 802, the driven pulley 803 and the synchronous drive belt are configured as toothed pulleys and toothed belts. The first bevel gear 805 is disposed inside the hollow shaft 703 and is fixedly connected to the outer periphery of the connecting shaft 804. The second bevel gear 806 is meshed with the bottom side of the first bevel gear 805, and a lead screw 807 is fixedly connected inside the second bevel gear 806. The bottom end of the lead screw 807 extends into the connecting seat 705 and is connected to the first lead screw sleeve 808. The bottom end of the first lead screw sleeve 808 is fixedly connected to the top of the counterweight 706. The lead screw 807 is rotatably connected inside the hollow shaft 703 and the connecting seat 705.

[0026] The specific usage and working principle are as follows: When testing requirements change and different specifications or weights of external test heads need to be replaced, there is no need to manually readjust the counterweight parameters. The external controller executes the test head load-eccentricity automatic matching algorithm to achieve intelligent calculation and precise adjustment of the counterweight position. The controller receives the actual load weight signal of the current test head from 12 weight sensors at the fixed end of the test head in real time, and simultaneously obtains the test head installation eccentricity parameters fed back by the angular displacement encoder. These two types of signals are transmitted to the dynamic balance mechanical model built into the controller. Based on the torque balance equation, with the goal of keeping the system's total center of mass always on the output shaft 6 axis, the controller automatically calculates the optimal eccentricity and target radial displacement required by the counterweight 706 under the current load, and generates high-precision adjustment commands to match the counterweight adjustment amount with the inertia characteristics of the test head. This algorithm achieves rapid matching of test heads of different weights with counterweight compensation torque through the load weight-eccentricity mapping relationship, ensuring that the mechanism remains in an ideal dynamic balance state after the test head is replaced. This significantly improves the adaptability and adjustment accuracy of the equipment in multi-specification and multi-load switching scenarios. In this application, the electronic control system, controller and sensor module are externally arranged to reduce the self-weight of the test head execution end and improve the lightweight movement and response sensitivity of the mechanism. The sensor acquisition, data processing and control output all adopt conventional and mature technologies in this field, so they will not be described in detail. Then, the operator manually operates the handle 809 according to the generated high-precision adjustment command, driving the shaft 801 and the drive pulley 802 to rotate. Utilizing the linkage effect between the drive pulley 802, the synchronous transmission belt, and the driven pulley 803, power is synchronously transmitted to the driven pulley 803, causing the driven pulley 803 to drive the first bevel gear 805 to rotate via the connecting shaft 804. Subsequently, utilizing the linkage effect between the first bevel gear 805 and the second bevel gear 806, power is transmitted to the second bevel gear 806, causing the second bevel gear 805 to rotate. Gear 806 drives lead screw 807 to rotate, causing first lead screw sleeve 808 to move counterweight 706 away from the axis of output shaft 6. This enables continuous adjustment and precise positioning of the eccentricity of counterweight 706, allowing the equipment to flexibly match and finely correct the system balance force and dynamic compensation torque according to the assembly requirements of test heads with different load specifications and inertia characteristics. This ensures that the whole machine can maintain an ideal dynamic balance state under multiple loads and multiple scene switching, effectively improving the applicability, versatility and expandability of the product under complex testing conditions.

[0027] Please see Figure 8 and Figure 9 The connector 705 has a damping component 9 inside, which includes: The connecting plate 901 is sleeved on the outer periphery of the first lead screw sleeve 808, and the first cone block 902 is fixedly connected to both sides of the bottom of the connecting plate 901. The connecting plate 901 is slidably connected inside the connecting seat 705. The inclined surface of the second cone block 903 is in contact with the inclined surface of the first cone block 902; The vertical plate 904 is fixedly connected to the side of the second cone block 903 away from the first cone block 902; Four first springs 905 are symmetrically installed in pairs on one side of the vertical plate 904, and the first springs 905 are located on the side away from the second cone block 903; Four movable damping plates 906 are symmetrically installed in pairs on the side of the vertical plate 904 away from the first spring 905. On the same side, two movable damping plates 906 are provided with fixed damping plates 907 on the side away from the vertical plate 904. The other side of the fixed damping plate 907 is fixedly connected to the outer wall of the counterweight block 706.

[0028] The specific usage method and working principle are as follows: During the eccentricity adjustment of the first lead screw sleeve 808 along the axial direction of the lead screw 807, it will synchronously drive the first cone blocks 902 on both sides to move through the connecting plate 901. At this time, the first cone block 902 will convert the vertical moving force into a lateral compressive force through the second cone block 903, and cause the second cone block 903 to drive the vertical plate 904 and the movable damping plate 906 to move towards the fixed damping plate 907. As the counterweight block 706 and the connecting plate 901 are continuously adjusted, the movable damping plate 906 exerts pressure on the fixed damping plate 907. The greater the damping force, the more adaptively the damping torque between the two increases, thus achieving synchronous automatic adjustment of the damping force as the eccentricity changes. Through automatic adjustment of the damping force, the high-frequency vibration and radial runout caused by the centrifugal force change can be precisely suppressed when the counterweight 706 makes eccentric rotational motion. This effectively blocks the vibration from being transmitted upward along the frame to the test head and the detection execution end, avoiding problems such as positioning drift and signal jitter caused by vibration interference. This ensures the accuracy of the test and the reliability of the data from the source, ensures a smooth and stable test process, and comprehensively improves the overall testing effect and detection reliability of the machine.

[0029] Please see Figure 5 , Figures 9-11 The connecting frame 11 is equipped with a separation vibration isolation component 13, which includes: An annular rubber layer 1316 is disposed inside the connecting frame 11, and the inner circumference of the annular rubber layer 1316 is sleeved on the probe fixing end 12. The annular rubber layer 1316 has multiple circular through holes arranged in a circular array inside. The equalizing plate 1301 is set inside the connecting frame 11 and is located above the annular rubber layer 1316. One side of the equalizing plate 1301 is connected to a flow channel through the infusion tube 1302. The flow channel is located inside the connecting frame 11 and the output shaft 6. The outer periphery of the output shaft 6 is connected to a sealing slip ring 1303 through a through hole. The sealing slip ring 1303 is sleeved on the outer periphery of the output shaft 6. One side of the sealing slip ring 1303 is provided with a limit box 1305 through the connecting tube 1304. The top of the limit box 1305 is fixedly connected to the bottom of the horizontal plate. A liquid bladder 1306 is installed inside the limiting box 1305. The top of the liquid bladder 1306 is fixedly connected to the bottom of the horizontal plate. One side of the liquid bladder 1306 is connected to the connecting pipe 1304. A sliding plate 1307 is fixedly connected to the bottom of the liquid bladder 1306. The sliding plate 1307 is slidably connected inside the limiting box 1305. A second lead screw sleeve 1308 is fixedly connected to the bottom of the sliding plate 1307. A reciprocating lead screw 1309 is driven and connected to the bottom side inside the second lead screw sleeve 1308. The reciprocating lead screw 1309 is composed of two threaded grooves with the same pitch and opposite directions. The bottom end of the reciprocating lead screw 1309 extends to the bottom of the limiting box 1305 and is fixedly connected to a third bevel gear 1310. The reciprocating lead screw 1309 is rotatably connected inside the limiting box 1305. A fourth bevel gear 1311 is meshed and connected to one side of the third bevel gear 1310. The fourth bevel gear 1311 is fixedly connected to the outer periphery of the output shaft 6. The bottom of the equalizing disk 1301 has multiple pipes arranged in a circular array. The bottom end of each pipe is connected to a cavity, which is located inside the connecting frame 11. Inside the cavity, a sealing slider 1312 and a piston 1313 are slidably sealed on one side. A second spring 1314 is fixedly connected to the side of the piston 1313 away from the sealing slider 1312. A guide rod 1315 is fixedly connected to the other side of the second spring 1314. The other end of the guide rod 1315 passes through a circular through hole and is provided with a limit hole, which is located on the top side inside the probe fixing end 12.

[0030] The specific usage method and working principle are as follows: When the output shaft 6 rotates, it will synchronously drive the third bevel gear 1310 and the reciprocating screw 1309 to rotate through the fourth bevel gear 1311. Utilizing the linkage effect between the reciprocating screw 1309 and the second screw sleeve 1308, the power is transmitted to the second screw sleeve 1308, causing the second screw sleeve 1308 to drive the sliding plate 1307 to move upward and squeeze the liquid bladder 1306. The liquid inside the liquid bladder 1306 is transported to the guide channel through the connecting pipe 1304. The liquid inside the guide channel is transported to multiple cavities through the infusion pipe 1302, the equalization plate 1301, and multiple pipes. As the liquid pressure on one side of the cavity increases, the piston 1313 will move towards the second spring 1314, realizing real-time adjustment of the pre-compression amount of the second spring 1314. As the output shaft 6 drives the connecting frame 11 and the probe fixing end 12 to swing higher, the reciprocating screw 1309 exerts a greater squeezing force on the liquid bladder 1306 through the second screw sleeve 1308 and the sliding plate 1307. This pressure increases as the output shaft 6 drives the connecting frame 11 and the probe fixing end 12 to rotate to a certain distance... Figure 1 The highest position, that is, relative Figure 1When the operating angle is rotated 180 degrees, the reciprocating screw 1309 drives the second screw sleeve 1308 to move at its maximum distance. The system hydraulic pressure and the preload of the second spring 1314 reach their peak values ​​simultaneously. Then, the output shaft 6 drives the connecting frame 11 and the probe fixed end 12 to continue rotating. At this time, the reciprocating screw 1309 drives the second screw sleeve 1308 to move in the opposite direction to reset. The pressure of the liquid bladder 1306 gradually decreases, and the piston 1313 and the second spring 1314 rebound and reset synchronously, realizing the periodic adaptive adjustment of hydraulic pressure and spring stiffness with the swing angle. The output shaft 6 synchronously drives the compression structure of the liquid bladder 1306, achieving mechanical linkage and adaptive adjustment between the probe swing amplitude and the preload of the second spring 1314: the larger the swing angle, the greater the preload of the second spring 1314 and the higher the system stiffness; it can automatically reciprocate and reset after rotating through the maximum swing angle. The overall structure is purely mechanically driven, highly synchronized, and responds quickly. It can suppress vibration and resonance during large swing amplitudes and maintain flexible vibration isolation during small swing amplitudes, significantly improving the operational stability and measurement accuracy of the device under different swing speeds and amplitudes. The annular rubber layer 1316 serves as the main vibration damping element, undertaking the functions of axial vibration isolation and high-frequency impact absorption for the connecting frame 11 and the probe fixing end 12. At the same time, it provides basic elastic support, hydraulic sealing and coaxiality compensation, transforming the rigid fixation of the connecting frame 11 and the probe fixing end 12 into flexible fixation, ensuring that the device maintains vibration isolation effect during stiffness adaptive adjustment, avoiding rigid connection, and improving dynamic stability and measurement accuracy.

[0031] 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 equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A five-axis measuring base mechanism with follow-up balancing function, comprising a rotating base (10), characterized in that, An output shaft (6) is rotatably connected to one side of the interior of the rotating seat (10). One end of the output shaft (6) extends to the outside of the rotating seat (10) and is fixedly connected to a connecting bracket (11). The structure also includes: The probe fixing end (12) is fixedly connected to the end of the connecting frame (11) away from the rotating seat (10); The follow-up balancing assembly (7) includes a hollow shaft (703) rotatably connected to the inside of the rotating seat (10) via a support base (704). A gear unit is provided at one end of the hollow shaft (703), and a connecting seat (705) is provided between the gear unit and the support base (704). A counterweight (706) is slidably connected inside the connecting seat (705) for following up and balancing the inertial forces of the rotating seat (10) and the connecting frame (11) through the connecting seat (705) and the counterweight (706).

2. The five-axis measuring base mechanism with follow-up balancing function according to claim 1, characterized in that, The gear unit includes: Driven gear (702) is fixedly connected to the outer circumference of hollow shaft (703); The driving gear (701) is meshed with the driven gear (702) on one side, and the driving gear (701) is fixedly connected to the outer periphery of the output shaft (6).

3. The five-axis measuring base mechanism with follow-up balancing function according to claim 1, characterized in that, The support base (704) is internally provided with a parallel adjustment assembly (8), which includes: A rotating shaft (801) is rotatably connected inside a support base (704), and one end of the rotating shaft (801) extends sequentially to the outside of the support base (704) and the rotating base (10) and is fixedly connected to a handle (809). The driving pulley (802) is fixedly connected to the outer periphery of the rotating shaft (801), and the outer periphery of the driving pulley (802) is connected to the driven pulley (803) via a synchronous belt drive. The driven pulley (803) is fixedly connected to the inside of the driving pulley (803), and the connecting shaft (804) is rotatably connected to the support base (704) and the hollow shaft (703).

4. A five-axis measuring base mechanism with follow-up balancing function according to claim 3, characterized in that, The parallel adjustment component (8) further includes: The first bevel gear (805) is disposed inside the hollow shaft (703) and is fixedly connected to the outer periphery of the connecting shaft (804); The second bevel gear (806) is meshed with the bottom side of the first bevel gear (805), and a lead screw (807) is fixedly connected inside the second bevel gear (806). The bottom end of the lead screw (807) extends into the connecting seat (705) and is connected to the first lead screw sleeve (808). The bottom end of the first lead screw sleeve (808) is fixedly connected to the top of the counterweight (706). The lead screw (807) is rotatably connected inside the hollow shaft (703) and the connecting seat (705).

5. A five-axis measuring base mechanism with follow-up balancing function according to claim 4, characterized in that, The connecting seat (705) is provided with a damping component (9), the damping component (9) includes: A connecting plate (901) is sleeved on the outer periphery of the first lead screw sleeve (808), and a first cone block (902) is fixedly connected to both sides of the bottom of the connecting plate (901). The connecting plate (901) is slidably connected inside the connecting seat (705). The inclined surface of the second cone (903) is in contact with the inclined surface of the first cone (902); The vertical plate (904) is fixedly connected to the side of the second cone block (903) away from the first cone block (902).

6. A five-axis measuring base mechanism with follow-up balancing function according to claim 5, characterized in that, The damping component (9) also includes: Four first springs (905) are symmetrically installed in pairs on one side of the vertical plate (904), and the first springs (905) are located on the side away from the second cone block (903).

7. A five-axis measuring base mechanism with follow-up balancing function according to claim 6, characterized in that, The damping component (9) also includes: Four movable damping plates (906) are symmetrically installed in pairs on the side of the vertical plate (904) away from the first spring (905), and fixed damping plates (907) are provided on the side of the two movable damping plates (906) away from the vertical plate (904) on the same side. The other side of the fixed damping plate (907) is fixedly connected to the outer wall of the counterweight block (706).

8. A five-axis measuring base mechanism with follow-up balancing function according to claim 1, characterized in that, Also includes: Mounting bracket (4) is set inside the top side of rotating seat (10), and the bottom side of mounting bracket (4) is fixedly connected to the top of support seat (704); The second motor (5) is fixedly connected to one side of the mounting bracket (4), and one end of the output shaft of the second motor (5) is fixedly connected to the end of the output shaft (6) away from the connecting bracket (11) through a flexible coupling; The fixed seat (2) is rotatably connected to the outer periphery of the top of the rotating seat (10) via a bearing; Top seat (1) is fixedly connected to the top of fixed seat (2); The first motor (3) is fixedly connected to the bottom of the top seat (1) through the limiting seat, and one end of the output shaft of the first motor (3) is connected to the rotating shaft through the coupling. The rotating shaft is rotatably connected to the outer periphery of the fixed seat (2). The bottom of the rotating shaft is fixedly connected to the rotating seat (10) and the top of the mounting bracket (4). A horizontal plate is fixedly connected to one side of the top of the rotating seat (10).

9. A five-axis measuring base mechanism with follow-up balancing function according to claim 8, characterized in that, The connecting frame (11) is provided with a separation vibration isolation component (13), which includes: An annular rubber layer (1316) is disposed inside the connecting frame (11), and the inner circumference of the annular rubber layer (1316) is sleeved on the probe fixing end (12). The annular rubber layer (1316) has multiple circular through holes arranged in a circular array inside. A distribution plate (1301) is set inside the connecting frame (11) and is located above the annular rubber layer (1316). One side of the distribution plate (1301) is connected to a flow channel through an infusion tube (1302). The flow channel is located inside the connecting frame (11) and the output shaft (6). The outer periphery of the output shaft (6) is connected to a sealing slip ring (1303) through a through hole. The sealing slip ring (1303) is sleeved on the outer periphery of the output shaft (6). One side of the sealing slip ring (1303) is provided with a limit box (1305) through a connecting tube (1304). The top of the limit box (1305) is fixedly connected to the bottom of the horizontal plate. A liquid bladder (1306) is disposed inside a limiting box (1305), and the top of the liquid bladder (1306) is fixedly connected to the bottom of a horizontal plate. One side of the liquid bladder (1306) is connected to a connecting pipe (1304). A sliding plate (1307) is fixedly connected to the bottom of the liquid bladder (1306). The sliding plate (1307) is slidably connected inside the limiting box (1305). A second lead screw sleeve (1308) is fixedly connected to the bottom of the sliding plate (1307). The bottom side of the second lead screw sleeve (1308) is connected to a transmission. There is a reciprocating screw (1309), which is composed of two threaded grooves with the same pitch and opposite directions. The bottom end of the reciprocating screw (1309) extends to the bottom of the limit box (1305) and is fixedly connected to a third bevel gear (1310). The reciprocating screw (1309) is rotatably connected inside the limit box (1305). A fourth bevel gear (1311) is meshed on one side of the third bevel gear (1310). The fourth bevel gear (1311) is fixedly connected to the outer periphery of the output shaft (6).

10. A five-axis measuring base mechanism with follow-up balancing function according to claim 9, characterized in that, The isolation vibration isolation assembly (13) also includes: The bottom of the equal distribution disk (1301) has multiple pipes arranged in a circular array. The bottom end of each pipe is connected to a cavity. The cavity is located inside the connecting frame (11). A sealing slider (1312) and a piston (1313) are slidably sealed on one side of the cavity. A second spring (1314) is fixedly connected to the side of the piston (1313) away from the sealing slider (1312). A guide rod (1315) is fixedly connected to the other side of the second spring (1314). The other end of the guide rod (1315) passes through a circular through hole and is provided with a limit hole. The limit hole is located on the top side inside the probe fixing end (12).

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