Screw rod detection device
Through innovative design of the clamping and detection mechanisms, the problems of clamping error, measurement instability, and limited detection flexibility in lead screw detection have been solved, achieving high-precision, stable, and flexible multi-parameter detection, and improving the comprehensiveness and efficiency of detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YIWU CHANGXIN TRANSMISSION EQUIP MFG CO LTD
- Filing Date
- 2026-01-23
- Publication Date
- 2026-04-28
AI Technical Summary
Existing lead screw testing equipment suffers from problems such as measurement errors introduced by the clamping method, unstable measurement pressure, and limited testing flexibility, making it difficult to achieve high-precision, stable, and flexible multi-parameter testing.
The design combines clamping and fixing mechanisms to form a high-precision, low-resistance dual-support rotary system. The clamping blocks are pneumatically driven to achieve synchronous radial opening and closing, while the auxiliary turntable provides axial support. The detection mechanism uses a screw drive and spring buffer system, combined with an electric slide rail and grating ruler to achieve constant force contact scanning and arbitrary point detection.
It achieves high precision, stability and flexibility in lead screw testing, reduces measurement errors, improves the comprehensiveness and efficiency of testing, and enables targeted testing of local wear or machining errors.
Smart Images
Figure CN121932884A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of lead screw testing technology, specifically referring to a lead screw testing device. Background Technology
[0002] As a core transmission component that converts rotary motion into linear motion, the precision of the lead screw (especially its pitch precision) directly affects the positioning accuracy and motion smoothness of high-precision equipment such as CNC machine tools, precision instruments, and robots. Therefore, conducting comprehensive testing of key parameters such as pitch error, cumulative length error, and operating temperature rise of the lead screw before shipment is a necessary step to ensure product quality. Currently, the testing methods of dedicated lead screw testing equipment have the following technical challenges: 1. Clamping method introduces measurement errors: Some existing automated testing equipment typically uses a method of clamping and driving at one end and pressing at the other end or supporting with a simple V-block to fix the lead screw. Traditional fixing methods (such as pressing at one end) will generate axial stress inside the lead screw, causing the lead screw to undergo slight axial movement or bending deformation during rotation. This deformation will be collected by the measurement system, thus contaminating the final accurate measurement data.
[0003] 2. Unstable measurement pressure: Some equipment uses rigid measuring probes or gauges, which cannot adapt to the radial runout of the lead screw and manufacturing tolerances. The measurement pressure fluctuates greatly, and excessive pressure may even exacerbate lead screw deformation, making it impossible to guarantee constant measurement conditions. Consequently, the repeatability and reliability of the measurement data are low.
[0004] 3. Limited testing flexibility: Traditional equipment often relies on the end of the lead screw or a specific reference point as the measurement starting point, making it difficult to perform targeted testing at any position. For lead screws with local wear or machining errors, it is easy to miss detections, and it is impossible to achieve simultaneous acquisition and comprehensive evaluation of multiple parameters such as pitch, length, and temperature rise. Summary of the Invention
[0005] To address the problems of measurement errors, unstable measurement pressure, and limited detection flexibility caused by the aforementioned clamping methods, this invention provides a lead screw detection device.
[0006] To achieve the above functions, the technical solution adopted by the present invention is as follows: a lead screw detection device, including a detection cabinet, a control host is provided on the detection cabinet, a drive component is provided inside the control host, and a clamping mechanism driven to rotate by the drive component is connected to the control host. The clamping mechanism is used to clamp one end of the lead screw and drive the lead screw to rotate. The testing cabinet is fixed with a support column, which is equipped with a horizontal adjustment mechanism and a pneumatic control component. The horizontal adjustment mechanism is connected to a support testing block, and an electric slide rail with a grating ruler is symmetrically fixed on the support testing block. A sliding plate one and a sliding plate two are slidably arranged on the electric slide rail. A testing mechanism is provided on the sliding plate one, and a fixing mechanism is provided on the sliding plate two.
[0007] Furthermore, the clamping mechanism includes a support plate with a support cylinder fixed to its side; A telescopic cylinder is fixed to the center of the side of the support plate, and its piston end moves through the support cylinder. A sleeve is fixed in the center of the support cylinder and surrounds the piston end of the telescopic cylinder; Clamping blocks, three sets are evenly arranged, and connected to the piston end of the telescopic cylinder through evenly arranged hinge blocks; Auxiliary turntable one is fixed at the end of the sleeve; The support cylinder is provided with slots evenly spaced, and the clamping block is slidably and detachably connected to the support cylinder through the slots. The clamping block is arc-shaped, and its clamping part has evenly spaced threaded parts on its inner wall.
[0008] Furthermore, the sleeve is evenly provided with slots, one end of the hinge block passes through the slot and is hinged to the piston end of the telescopic cylinder, and the other end is hinged to the inner wall of the clamping block. The hinge is fixed by screws.
[0009] Furthermore, the drive assembly includes a detection motor embedded in the control host, whose output shaft rotates through the control host and is fixedly connected to the support plate.
[0010] Furthermore, the detection mechanism includes a column fixed on a sliding plate, and a groove is provided on its side; The support plate is fixed to the top of the column, and a power distribution block is fixed to its side; The screw is rotatably mounted between the support plate and the sliding plate. A rotary motor is fixed to a support plate, and its output shaft passes through the support plate and is connected to the top of the screw. The sleeve block is threadedly connected to the screw rod and is fixedly connected to an auxiliary slider that slides in the groove; The support block is fixed to the side of the sleeve block; The support rod is movable through the support block and is limited by the top ring; The connecting block is fixed to the bottom end of the support rod; The spring is fixed at one end to the bottom of the support block and at the other end to the top of the connecting block; The detection block is plugged into the connecting block; An L-shaped block is fixed on the support block, and a temperature sensor is fixed through the L-shaped block.
[0011] Furthermore, the top of the detection block is connected to a plug-in block with a fixing hole. The detection block is plugged into the connecting block through the plug-in block and fixed by screws that thread through the opening and fixing hole on the connecting block in sequence. The detection block is a one-third circle threaded ring gauge with threaded grooves inside.
[0012] Furthermore, the fixing mechanism includes an inverted L-shaped plate, which is fixed on the sliding plate two; The reciprocating cylinder is fixed to the inverted L-shaped plate; Two sets of fixed clamping blocks are symmetrically arranged, one set located on the top and one on the bottom. The upper set of fixed clamping blocks is fixed to the piston rod of the reciprocating cylinder, and the lower set of fixed clamping blocks is fixed to the sliding plate. The limiting rod has one end that passes through the inverted L-shaped plate and the other end that is fixed to a set of fixing blocks located above it. The top block is fixed to the inverted L-shaped plate, and an auxiliary turntable two, which is coaxial with the auxiliary turntable one, is rotatably mounted on its side.
[0013] Furthermore, the fixed clamping block has a triangular groove inside, and a through groove communicating with the triangular groove is also provided on the fixed clamping block. Multiple sets of rollers are rotatably provided at the connection between the through groove and the triangular groove. The lead screw is clamped and fixed in the triangular groove, and its outer wall is set to fit the outer wall of the roller. The end is fixedly contacted by the auxiliary turntable.
[0014] Furthermore, the leveling mechanism includes air detectors, with three sets evenly installed between the support column and the support detection block; The leveling instrument is fixed on the supporting testing block.
[0015] Furthermore, a horizontal groove is provided on the top of the testing cabinet, and the supporting testing block is moved through the horizontal groove; The testing cabinet is equipped with a power distribution component; The testing cabinet is symmetrically hinged with cabinet doors. The top of the testing cabinet is equipped with a tank chain for placing and protecting the cables. One end of the tank chain is fixed to the testing cabinet, and the other end is connected to the power distribution block fixed on the support plate through the cables inserted inside it. The bottom of the control unit has a guide rail groove for the electric guide rail to pass through; the front side has a cable groove for the cable to pass through.
[0016] Compared with the prior art, the present invention achieves the following beneficial effects by adopting the above structure: 1. Through the coordinated design of the clamping and fixing mechanisms, a high-precision, low-resistance "dual-support rotation system" is formed. The three sets of arc-shaped clamping blocks in the clamping mechanism achieve synchronous radial opening and closing via pneumatic drive. The inner threaded portion tightly engages with the lead screw surface, ensuring stable transmission of driving torque and adapting to lead screws of different diameters. Auxiliary turntable one is coaxially arranged with auxiliary turntable two of the fixing mechanism, forming axial support. Combined with the roller structure within the triangular groove of the fixing block, the sliding friction during lead screw rotation is converted into rolling friction, significantly reducing rotational resistance and surface wear. The combination of rigid clamping at the driving end and elastic constraint at the fixing end not only eliminates radial movement and axial offset during lead screw rotation but also ensures the consistency of the rotation axis through symmetrically distributed clamping forces, providing a stable benchmark for high-precision testing.
[0017] 2. The detection mechanism achieves synergistic effects between constant force contact scanning measurement and precise detection at any point, ensuring the stability of detection accuracy while overcoming the spatial limitations of traditional detection methods. The detection mechanism employs a screw-driven lifting module with a spring buffer system, ensuring that the detection block of the one-third circle thread ring gauge maintains a constant pressure and adaptive contact with the rotating screw thread surface, effectively preventing wear and data jumps caused by rigid contact. The plug-in detection block design supports quick replacement and flexibly adapts to the detection needs of different screw specifications.
[0018] 3. Through the coordinated setup of an electric slide rail, sliding plate one, sliding plate two, a detection mechanism, and a fixing mechanism, the electric slide rail with an integrated grating ruler allows sliding plate one to drive the detection mechanism to move freely along the lead screw axis. Sliding plate two can be adapted to lead screws of different lengths by adjusting the position of the fixing mechanism. Operators can precisely position the detection block at any position on the lead screw as the starting point according to the detection requirements, without relying on the end of the lead screw or a specific reference point. Furthermore, multiple inspections can be performed on different sections of the same set of lead screw components. For lead screws with localized wear or machining errors, the detection starting point can be directly set at the suspected abnormal position. The host control drives the detection mechanism to inspect along that area. Combined with the coordinated operation of the rotary motor and the detection motor, real-time data on the pitch, length, and temperature rise of that section is collected, enabling targeted, precise localized inspection. This combination not only reduces redundant data generated by the overall inspection but also quickly pinpoints the defect location of the lead screw, significantly improving the flexibility, comprehensiveness, and efficiency of the inspection. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of a lead screw detection device proposed in this invention; Figure 2 This is a partial structural diagram of a lead screw detection device proposed in this invention. Figure 1 ; Figure 3This is a partial structural diagram of a lead screw detection device proposed in this invention. Figure 2 ; Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 This is a partial structural diagram of a lead screw detection device proposed in this invention. Figure 3 ; Figure 6 for Figure 5 Enlarged view of section B in the middle.
[0020] Figure 7 This is a schematic diagram of the overall structure of the control host and clamping mechanism proposed in this invention; Figure 8 This is a schematic diagram of the overall structure of the drive assembly and clamping mechanism proposed in this invention. Figure 9 for Figure 8 The sectional view in the image.
[0021] The components include: 1. Inspection cabinet; 11. Support column; 12. Pneumatic control assembly; 13. Support inspection block; 14. Electric slide rail; 15. Sliding plate one; 16. Sliding plate two; 17. Horizontal adjustment mechanism; 171. Air detector; 172. Horizontal detector; 18. Power distribution assembly; 19. Cabinet door; 2. Control host; 21. Drive assembly; 211. Inspection motor; 22. Clamping mechanism; 221. Support plate; 222. Support cylinder; 223. Telescopic cylinder; 224. Sleeve; 2241. Slot; 225. Clamping block; 226. Auxiliary turntable one; 227. Slot; 228. Threaded part; 229. Hinge block; 23. Guide rail through groove; 24. Cable through groove; 3. Inspection mechanism; 31. Column; 311. Support plate; 312. Power distribution block; 32. Screw; 33. Rotary motor. 34. Sleeve block; 341. Auxiliary slider; 35. Support block; 351. L-shaped block; 352. Connecting block; 36. Support rod; 361. Top ring; 37. Spring; 38. Detection block; 381. Threaded groove; 382. Insertion block; 39. Temperature sensor; 4. Fixing mechanism; 41. Inverted L-shaped plate; 42. Reciprocating cylinder; 43. Fixing clamp; 431. Triangular groove; 432. Through groove; 433. Roller; 44. Limiting rod; 45. Top block; 46. Auxiliary turntable two; 5. Tank chain; 51. Cable; 6. Lead screw component. Detailed Implementation
[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The invention will be further described in detail below with reference to the accompanying drawings.
[0025] like Figure 1-9 As shown, the present invention provides a lead screw testing device, including a testing cabinet 1, a control host 2 on the testing cabinet 1, a drive assembly 21 inside the control host 2, and a clamping mechanism 22 driven to rotate by the drive assembly 21 connected to the control host 2. The clamping mechanism 22 is used to clamp one end of the lead screw 6 and drive the lead screw 6 to rotate. A support column 11 is fixed inside the testing cabinet 1, and a horizontal adjustment mechanism 17 and a pneumatic control assembly 12 are provided on the support column 11. The horizontal adjustment mechanism 17 is connected to a support testing block 13, and the support testing block 13 is equipped with... An electric slide rail 14 with a grating ruler is symmetrically fixed. A horizontal adjustment mechanism 17 is used to adjust the levelness of the support detection block 13. A pneumatic control assembly 12 is used to control the operation of each pneumatic component. A sliding plate 15 and a sliding plate 16 are slidably mounted on the electric slide rail 14. A detection mechanism 3 is mounted on the sliding plate 15, and a fixing mechanism 4 is mounted on the sliding plate 16. The fixing mechanism 4 is used to fix the other end of the lead screw 6. The detection mechanism 3 is used to detect the length and pitch of the lead screw 6, which is fixed and rotated between the clamping mechanism 22 and the fixing mechanism 4. The top of the testing cabinet 1 has a horizontal groove, through which the moving testing block 13 is supported; the testing cabinet 1 is equipped with a power distribution component 172 level detector 18, which is used to power the device; the testing cabinet 1 is symmetrically hinged with cabinet doors 19 to protect the internal components of the testing cabinet 1; the top of the testing cabinet 1 is equipped with a tank chain 5 for placing and protecting the cable 51, one end of the tank chain 5 is fixed to the testing cabinet 1, and the other end is connected to the power distribution block 312 fixed on the support plate 311 through the cable 51 inserted inside it; the bottom of the control host 2 has a guide rail groove 23 for the electric guide rail to pass through; the front side has a cable groove 24 for the cable to pass through, making the device layout more reasonable and facilitating component connection and cable arrangement.
[0026] like Figure 1-3 As shown in Figure 7-9, the clamping mechanism 22 includes a support plate 221 with a support cylinder 222 fixed to its side; a telescopic cylinder 223 fixed to the center of the side of the support plate 221, with its piston end moving through the support cylinder 222; a sleeve 224 fixed to the center of the support cylinder 222 and surrounding the piston end of the telescopic cylinder 223; three sets of clamping blocks 225 evenly arranged and connected to the piston end of the telescopic cylinder 223 by evenly arranged hinge blocks 229; an auxiliary turntable 226 fixed to the end of the sleeve 224; and the support cylinder 222. The support cylinder 222 has slots 227 evenly spaced on its upper part. Clamping blocks 225 are slidably and detachably connected to the support cylinder 222 via the slots 227. The clamping blocks 225 are arc-shaped, and their inner walls are evenly provided with threads 228. When the piston end of the telescopic cylinder 223 extends or retracts, the hinge block 229 drives the three sets of arc-shaped clamping blocks 225 to slide along the slots 227 of the support cylinder 222, thereby clamping or releasing the lead screw 6. The threads 228 on the inner walls of the clamping blocks 225 enhance the friction with the lead screw 6. The auxiliary turntable 226 assists the lead screw. 6. Stable rotation; three sets of symmetrical clamping blocks 225 can accommodate lead screw components 6 of different diameters, providing stable clamping and convenient loading and unloading; the threaded part 228 improves clamping reliability and prevents slippage of the lead screw component 6 during rotation; the auxiliary turntable 226 reduces end friction of the lead screw component 6 during rotation, ensuring smooth rotation and improving detection stability; a set of evenly distributed hinge blocks 229 converts the motion into synchronous radial opening and closing motion of the three clamping blocks 225, forming a highly efficient pneumatic three-jaw chuck; the threaded teeth on the inner wall of the clamping blocks 225 can effectively engage the lead screw. The surface provides a large transmission friction force to prevent slippage during high-speed rotation; the auxiliary turntable at the front end is used as a thrust bearing to bear the axial force of the lead screw and provide it with smooth rotational support, ensuring smooth rotation and reducing end face friction loss; the sleeve 224 is evenly provided with slots 2241, one end of the hinge block 229 passes through the slot 2241 and is hinged to the piston end of the telescopic cylinder 223, and the other end is hinged to the inner wall of the clamping block 225. The hinge is fixed by screws, which can be removed for easy replacement of the clamping block 225; The drive assembly 21 includes a detection motor 211 embedded in the control host 2. Its output shaft rotates through the control host 2 and is fixedly connected to the support plate 221. When the detection motor 211 is running, it directly drives the support plate 221 and the connected clamping mechanism 22 to rotate, thereby driving the lead screw 6 to rotate. It can accurately control the rotation speed of the lead screw 6, provide stable detection conditions for the detection mechanism 3, facilitate automated control, and improve detection efficiency.
[0027] like Figure 1-6 As shown, the detection mechanism 3 includes a column 31 fixed to a sliding plate 15, with a groove on its side; a support plate 311 fixed to the top of the column 31, with a power distribution block 312 fixed to its side; a screw 32 rotatably disposed between the support plate 311 and the sliding plate 15; a rotary motor 33 fixed to the support plate 311, with its output shaft passing through the support plate 311 and connected to the top of the screw 32; a sleeve block 34 threadedly connected to the screw 32, and fixedly connected to an auxiliary slider 341 sliding in the groove; a support block 35 fixed to the side of the sleeve block 34; a support rod 36 movable through the support block 35 and limited by a top ring 361; and a connecting block 352. Fixed to the bottom of the support rod 36; spring 37, one end fixed to the bottom of the support block 35, the other end fixed to the top of the connecting block 352; detection block 38, inserted into the connecting block 352; L-shaped block 351 fixed on the support block 35, temperature sensor 39 fixed through the L-shaped block 351, used to detect the transmission friction temperature of the lead screw 6. The temperature sensor 39 is close to the lead screw 6 to detect the friction temperature of the lead screw 6 during transmission, monitor the temperature change in real time, and promptly grasp the temperature of the lead screw 6 caused by friction, so as to avoid the temperature from being too high and affecting the performance of the lead screw 6 and the detection results, thus ensuring the reliability of the detection data and preventing the device from being damaged due to overheating. The top of the detection block 38 is connected to a plug-in block 382 with a fixing hole. The detection block 38 is plugged into the connecting block 352 through the plug-in block 382 and fixed by screws that thread through the opening and fixing hole in the connecting block 352 in sequence. The detection block 38 is a one-third circle threaded ring gauge with threaded grooves 381 inside. The rotary motor 33 drives the screw 32 to rotate, causing the sleeve block 34 to move up and down along the screw 32. The sleeve block 34 is held in place by the auxiliary slider 341 sliding in the groove of the column 31. Stable; the support block 35 moves with the sleeve block 34, and the support rod 36, under the action of the spring 37, makes the inner wall of the detection block 38 fit against the lead screw 6; the detection block 38 is a one-third circle threaded ring gauge, which is threadedly engaged with the rotating lead screw 6 to realize pitch detection. The screw 32 drives the detection block 38 to rise and fall smoothly, and the elasticity of the spring 37 ensures that the detection block 38 and the lead screw 6 are in close contact, improving the detection accuracy; the plug-in detection block 38 is easy to replace and can be adapted to lead screws of different specifications, increasing the versatility of the device.
[0028] like Figure 1-3As shown in Figure 5, the fixing mechanism 4 includes an inverted L-shaped plate 41 fixed to the sliding plate 16; a reciprocating cylinder 42 fixed to the inverted L-shaped plate 41; two sets of fixing blocks 43 symmetrically arranged, with the upper set of fixing blocks 43 fixed to the piston rod of the reciprocating cylinder 42 and the lower set of fixing blocks 43 fixed to the sliding plate 16; a limiting rod 44, one end of which passes through the inverted L-shaped plate 41 and the other end of which is fixed to the upper set of fixing blocks 43; a top block 45 fixed to the inverted L-shaped plate 41, with an auxiliary turntable 46 rotatably mounted on its side, coaxial with the auxiliary turntable 226; and the reciprocating cylinder 42. The upper fixed clamping block 43 is driven to move up and down, cooperating with the lower fixed clamping block 43 to clamp the other end of the lead screw 6; the limiting rod 44 ensures that the upper fixed clamping block 43 moves smoothly; the auxiliary turntable 2 46 and the auxiliary turntable 1 226 are coaxial, together forming the rotational support at both ends of the lead screw, ensuring the coaxiality of the entire shaft system, and bearing possible axial force to prevent the workpiece from moving; the upper and lower symmetrical fixed clamping blocks 43 can firmly clamp the lead screw 6 and adapt to lead screws 6 of different diameters; the auxiliary turntable 2 46 reduces the friction at the end of the lead screw 6, ensuring smooth rotation, and cooperates with the clamping mechanism 22 to make the force at both ends of the lead screw 6 balanced, improving the detection stability; The fixed clamping block 43 has a triangular groove 431 inside, and a through groove 432 communicating with the triangular groove 431 is also provided on the fixed clamping block 43. Multiple sets of rollers 433 are rotatably arranged at the connection between the through groove 432 and the triangular groove 431. The lead screw 6 is clamped and fixed in the triangular groove 431, and its outer wall is set to fit the outer wall of the roller 433. When the lead screw 6 rotates, the roller 433 rotates with it, reducing frictional resistance and allowing the lead screw to be firmly constrained in the radial direction while rotating freely in the axial direction. The end is fixedly contacted with the auxiliary turntable 46. The design of the triangular groove 431 enhances the clamping stability of the lead screw 6. The rolling friction of the roller 433 replaces the sliding friction, reducing the wear on the surface of the lead screw 6, while reducing rotational resistance, making the lead screw 6 rotate more smoothly and improving the detection accuracy.
[0029] like Figure 2 and 5 As shown, the leveling mechanism 17 includes three sets of air detectors 171, evenly installed between the support column 11 and the support detection block 13; and a level detector, fixed on the support detection block 13, which detects the level status of the support detection block 13 and displays the levelness in real time, facilitating leveling adjustments. The combination of multiple sets of air detectors 171 and the level detector enables accurate detection of the levelness of the support detection block 13. By adjusting, the detection benchmark level is ensured, avoiding the impact of level deviation on detection accuracy and providing a foundation for high-precision detection.
[0030] In practical use I. Preparations before testing 1. Leveling: Observe the level indicator fixed on the support detection block 13; if the level indicator is not level, adjust the height of the three evenly distributed air detectors 171 until the support detection block 13 is completely level. 2. Installation and replacement of detection block 38: If it is necessary to replace the detection block 38 on the detection mechanism 3, loosen the screws that fix the connecting block 352 and the plug block 382; remove the current detection block 38, select a new detection block 38 that matches the thread specification of the lead screw to be tested; insert the plug block 382 of the new detection block 38 into the slot of the connecting block 352, align it with the fixing hole, and tighten it again with screws; 3. Adjust the range of clamping block 225: If the diameter of the lead screw to be measured does not match the range of clamping block 225 of the current clamping mechanism 22, it can be disassembled and replaced. Unscrew the screws at both ends of the hinge block 229, slide the old clamping block 225 out of the slot 227 of the support cylinder 222, replace it with a new clamping block 225 that fits, and then tighten the screws again.
[0031] II. Clamping the workpiece 1. Moving and fixing mechanism 4: Operated on the control host 2, controlling the electric slide rail 14 to move, so that the fixing mechanism 4 on the sliding plate 16 moves away from the clamping mechanism 22, leaving enough clamping space; 2. Place and clamp the lead screw: Place one end of the lead screw to be tested into the open three jaws of the clamping mechanism 22, and place the other end freely in the V-groove of the lower fixed clamping block 43 of the fixing mechanism 4; control the telescopic cylinder 223 to drive the three clamping blocks 225 to retract synchronously and firmly clamp the driving end of the lead screw; control the reciprocating cylinder 42 to drive the upper fixed clamping block 43 to descend and cooperate with the lower fixed clamping block 43 to clamp the other end of the lead screw between the rollers 433 in the V-groove. The end face of the lead screw should be against the end face of the auxiliary turntable 46. Then fix the sliding plate 16 on the electric slide rail 14.
[0032] 3. Arbitrarily select the starting position of the lead screw component 6 for detection: Move the detection mechanism 3 to the arbitrarily selected starting position of the lead screw component 6 via the electric slide rail 14, start the rotary motor 33 and the detection motor 211, drive the screw 32 to rotate and the lead screw component 6 to rotate. The rotation of the screw 32 causes the detection block 38 to descend to contact and tightly engage with the threaded surface of the rotating lead screw component, and maintain elastic contact under the constant force provided by the spring 37.
[0033] III. Perform testing 1. Set the detection parameters: Set the detection parameters on the control host 2, such as the theoretical detection length, detection speed, and detection stroke of the lead screw; 2. Start the test: Click the "Start Test" button on the control host 2. The device will operate automatically according to a preset program: the detection motor 211 starts, driving the lead screw to rotate at a set speed through the clamping mechanism 22; the motor of the electric slide rail 14 starts, actively and uniformly driving the sliding plate 15 and the entire detection mechanism 3 on it to move from the set starting point to the ending point along the lead screw axis. During this process, the grating ruler records the actual position information (length) of the detection mechanism 3 in real time with high precision and transmits it to the control host 2; the detection block 38 (maintains engagement with the rotating lead screw thread under the constant force of the spring 37); the measurement system calculates the pitch error by analyzing the precise moving distance of the detection mechanism 3 and the number of rotations of the lead screw; the temperature sensor 39 synchronously monitors and records the temperature rise change of the lead screw transmission pair; the control host 2 thereby detects the transmission friction temperature, actual detection length, detection pitch, detection speed and other parameters of the lead screw 6, and judges whether the error of the lead screw 6 at this end is within the qualified range; this device can detect different positions of the same group of lead screws 6 multiple times to compare and judge whether the lead screw 6 is qualified.
[0034] IV. Completion of Inspection and Unloading 1. Inspection complete: All machinery stops moving; 2. Viewing and Analyzing Results: The control host 2 automatically generates a test report, displaying parameters such as transmission friction temperature, actual test length, test pitch, and test speed, as well as data such as length error, pitch error curve, and temperature curve. Operators can directly view the report on the screen or export it for further analysis.
[0035] 3. Unload the workpiece: Control the detection mechanism 3 to rise and return to a safe height; control the reciprocating cylinder 42 to release the upper fixed clamping block 43 at the fixed end; control the telescopic cylinder 223 to release the clamping mechanism 22 at the drive end; remove the lead screw that has completed the detection from the device.
[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A lead screw testing device, comprising a testing cabinet (1) and a control host (2), characterized in that: The testing cabinet (1) is fixed with a support column (11). The support column (11) is equipped with a horizontal adjustment mechanism (17) and a pneumatic control component (12). The horizontal adjustment mechanism (17) is connected to a support testing block (13). The support testing block (13) is symmetrically fixed with an electric slide rail (14). The electric slide rail (14) is slidably equipped with a sliding plate one (15) and a sliding plate two (16). The sliding plate one (15) is equipped with a testing mechanism (3), and the sliding plate two (16) is equipped with a fixing mechanism (4). The control host (2) is equipped with a drive component (21), and the control host (2) is connected to a clamping mechanism (22) that is driven to rotate by the drive component (21).
2. The lead screw detection device according to claim 1, characterized in that: The detection mechanism (3) includes a column (31) fixed on a sliding plate (15), and a sliding groove is provided on its side; The support plate (311) is fixed to the top of the column (31), and a power distribution block (312) is fixed to its side. The screw (32) is rotatably disposed between the support plate (311) and the sliding plate (15); A rotary motor (33) is fixed on a support plate (311), and its output shaft passes through the support plate (311) and is connected to the top of the screw (32); The sleeve (34) is threadedly connected to the screw (32) and is fixedly connected to the auxiliary slider (341) that slides in the groove. Support block (35) is fixed to the side of sleeve block (34); The support rod (36) is movable through the support block (35) and limited by the top ring (361); Connecting block (352) is fixed to the bottom end of support rod (36); The spring (37) is fixed at one end to the bottom of the support block (35) and at the other end to the top of the connecting block (352); The detection block (38) is plugged into the connecting block (352).
3. The lead screw detection device according to claim 2, characterized in that: An L-shaped block (351) is fixed on the support block (35), and a temperature sensor (39) is fixed through the L-shaped block (351).
4. The lead screw detection device according to claim 2, characterized in that: The top of the detection block (38) is connected to a plug-in block (382) with a fixing hole. The detection block (38) is plugged into the connecting block (352) through the plug-in block (382) and fixed by screws that thread through the opening and fixing hole on the connecting block (352) in sequence. The detection block (38) is a one-third circle threaded ring gauge with threaded grooves (381) inside.
5. The lead screw detection device according to claim 1, characterized in that: The fixing mechanism (4) includes an inverted L-shaped plate (41) fixed on the sliding plate (16); A reciprocating cylinder (42) is fixed on an inverted L-shaped plate (41); Two sets of fixed clamping blocks (43) are symmetrically arranged, one set of fixed clamping blocks (43) located above is fixed to the piston rod of the reciprocating cylinder (42), and the other set of fixed clamping blocks (43) located below is fixed to the sliding plate (16). The limiting rod (44) passes through the inverted L-shaped plate (41) at one end and is fixed to a set of fixing blocks (43) located above it at the other end; The top block (45) is fixed on the inverted L-shaped plate (41), and the auxiliary turntable (46) with the same axis as the auxiliary turntable (226) is rotatably mounted on its side.
6. The lead screw detection device according to claim 5, characterized in that: The fixed clamp (43) has a triangular groove (431) inside, and a through groove (432) communicating with the triangular groove (431) is also provided on the fixed clamp (43). Multiple sets of rollers (433) are rotatably provided at the connection between the through groove (432) and the triangular groove (431). The lead screw (6) is clamped and fixed in the triangular groove (431), and its outer wall is set to fit the outer wall of the roller (433). The end is fixed to contact the auxiliary turntable (46).
7. The lead screw detection device according to claim 1, characterized in that: The clamping mechanism (22) includes a support plate (221) with a support cylinder (222) fixed on its side. Telescopic cylinder (223) is fixed to the center of the side of support plate (221), and its piston end moves through the support cylinder (222); A sleeve (224) is fixed in the center of the support cylinder (222) and is arranged around the piston end of the telescopic cylinder (223); Clamping blocks (225) are evenly arranged in three sets and connected to the piston end of telescopic cylinder (223) through evenly arranged hinge blocks (229); Auxiliary turntable 1 (226) is fixed to the end of sleeve (224); The support cylinder (222) is provided with slots (227) evenly. The clamping block (225) is slidably and detachably connected to the support cylinder (222) through the slots (227). The clamping block (225) is arc-shaped, and its clamping part is provided with threaded parts (228) evenly on the inner wall.
8. The lead screw detection device according to claim 7, characterized in that: The sleeve (224) is evenly provided with slots (2241). One end of the hinge block (229) passes through the slot (2241) and is hinged to the piston end of the telescopic cylinder (223). The other end is hinged to the inner wall of the clamping block (225). The hinge is fixed by screws.
9. The lead screw detection device according to claim 1, characterized in that: The drive assembly (21) includes a detection motor (211) embedded in the control host (2), whose output shaft rotates through the control host (2) and is fixedly connected to the support plate (221).
10. A lead screw detection device according to claim 1, characterized in that: The top of the testing cabinet (1) is provided with a horizontal groove, and the supporting testing block (13) is moved through the horizontal groove; The testing cabinet (1) is equipped with a power distribution assembly (172 level detector; 18); The testing cabinet (1) is symmetrically hinged with cabinet doors (19); The top of the testing cabinet (1) is provided with a tank chain (5) for placing and protecting the cable (51). One end of the tank chain (5) is fixed on the testing cabinet (1), and the other end is connected to the power distribution block (312) fixed on the support plate (311) through the cable (51) inserted inside it.