Scraping strength measuring instrument

Abstract

The utility model relates to a scraping strength measuring instrument. The instrument comprises a carrying platform; the clamping module is installed on the carrying table and comprises a first driving unit, a second driving unit, a main shaft and a tail shaft, the output end of the first driving unit is connected with the main shaft and used for driving the clamping end of the main shaft to rotate, and the output end of the second driving unit is connected with the tail shaft and used for driving the tail shaft to move; the clamping end of the tail shaft is coaxial with the clamping end of the main shaft and is used for clamping the rotating shaft; the measuring module comprises a third driving unit, a fourth driving unit, a measuring meter and a measuring head, the third driving unit is installed on the carrying table, the output end of the third driving unit is used for providing moving power, the fourth driving unit is installed at the output end of the third driving unit, and the output end of the fourth driving unit is used for providing moving power in the vertical direction; the measuring meter is fixed at the output end of the fourth driving unit; the measuring head is locked and attached to the measuring meter and is connected with a detection part of the measuring meter; the scraping strength measuring instrument is high in measuring accuracy, wide in measuring range and good in reliability.

Description

Technical Field

[0001] This application relates to the field of strength measuring instruments, and in particular to a scraping strength measuring instrument. Background Technology

[0002] With the development of science and technology and the increasing level of industrial processing, rod-shaped shafts are usually coated to adapt to application scenarios with high wear and easy corrosion. The coating condition of the shaft surface has become an important factor affecting the performance of the shaft.

[0003] Currently, the coating condition of shaft surfaces is generally detected by surface scraping, and the coating condition is reflected by measuring the scraping intensity. At present, measuring the scraping intensity of shaft surfaces requires fixing the shaft and obtaining the measurement pressure by rotating the measuring instrument one revolution. This measurement pressure characterizes the coating condition of the shaft surface. However, this scraping intensity measurement method has a small measurement pressure range, large measurement error, a limited range of shaft sizes that can be measured, and is cumbersome, difficult, and unstable, with poor reliability of the measurement structure.

[0004] Therefore, providing a scratch strength measuring instrument with high accuracy, wide measurement range and good reliability is a technical problem that urgently needs to be solved. Utility Model Content

[0005] Therefore, it is necessary to provide a scratch strength measuring instrument to address the above problems. This scratch strength measuring instrument has high measurement accuracy, a wide measurement range, and good reliability.

[0006] This application provides a scratch strength measuring instrument, including:

[0007] Platform;

[0008] A clamping module, installed on the platform, includes a first drive unit, a second drive unit, a main spindle, and a tail spindle. The output end of the first drive unit is connected to the main spindle and is used to drive the clamping end of the main spindle to rotate around a first axis. The output end of the second drive unit is connected to the tail spindle and is used to drive the tail spindle to move along the first axis. The clamping end of the tail spindle is coaxial with the clamping end of the main spindle and is used to clamp the rotating shaft.

[0009] The measurement module includes a third drive unit, a fourth drive unit, a measuring instrument, and a measuring head. The third drive unit is mounted on the platform and its output end is used to provide power for movement along the first axis. The fourth drive unit is mounted on the output end of the third drive unit and its output end is used to provide power for movement in the vertical direction. The measuring instrument is fixed to the output end of the fourth drive unit, and the measuring head is locked onto the measuring instrument and connected to the detection part of the measuring instrument.

[0010] When using the aforementioned scratch strength measuring instrument, the tail shaft is first driven away from the main shaft along the first axis by the output of the second drive unit. The measuring gauge and measuring head are then driven upwards vertically by the output of the fourth drive unit to obtain an installation space suitable for shafts of different sizes and to facilitate installation of the shaft on the scratch strength measuring instrument. The shaft to be tested is then placed between the clamping end of the tail shaft and the clamping end of the main shaft, and the second drive unit is driven in reverse. The output of the second drive unit drives the tail shaft closer to the main shaft along the first axis, so that the clamping ends of the coaxially arranged tail shaft and main shaft clamp the shaft. The shaft is stably clamped, and the subsequent rotation is relatively stable, resulting in high measurement stability and reliability. The fourth drive unit, the output of the third drive unit, moves the measuring gauge and measuring head to the position to be tested on the shaft. The fourth drive unit is then driven in reverse, and its output moves the measuring gauge and measuring head downwards vertically. The measuring head contacts the shaft for surface measurement. By selecting a suitable measuring gauge, the required measurement error is determined, and by selecting a suitable measuring head, the required measurement pressure range is obtained. Then, the clamping end of the main shaft is driven to rotate around the first axis by the output end of the first drive unit. The clamping ends of the rotating shaft and the tail shaft rotate together, so as to realize the measurement of one rotation of the rotating shaft by the measuring head and the measuring instrument. Moreover, the number of rotations of the rotating shaft can be adjusted by the output of the fourth drive unit to obtain a suitable measurement sampling range.

[0011] In one embodiment, the spindle includes:

[0012] A first fixed seat is installed on the platform and has a first stepped hole that penetrates its thickness.

[0013] A first connecting shaft passes through the first stepped hole and is connected to the output end of the first drive unit. The first connecting shaft is rotatably connected to the first stepped hole through a first bearing structure.

[0014] A first fixture is installed at the end of the first connecting shaft away from the first drive unit and forms the clamping end of the spindle.

[0015] In one embodiment, the first fixing seat includes a first seat body and a second seat body. The first seat body is fixed to the platform and has a stepped first through hole. The second seat body is fixed to the first seat body and has a stepped second through hole. The first through hole and the second through hole are arranged opposite each other and form the second stepped hole.

[0016] The first bearing structure includes a first planar bearing and two first angular contact bearings. The two first angular contact bearings are spaced apart in the first through hole and are rotatably connected to the first connecting shaft. The first planar bearing is disposed in the second through hole and is rotatably connected to the first connecting shaft.

[0017] In one embodiment, the tail shaft includes:

[0018] The second fixing base is installed at the output end of the second drive unit and has a second stepped hole;

[0019] The second connecting shaft is rotatably connected to the second stepped hole via a second bearing structure;

[0020] A first elastic element is disposed on the second connecting shaft and configured to drive the second connecting shaft to extend or retract along the first axis;

[0021] The second fixture is mounted on the second connecting shaft and extends out of the second stepped hole to form the clamping end of the tail shaft.

[0022] In one embodiment, the second fixing base includes a first cylinder, a second cylinder, and a cover plate. The first cylinder is fixed to the output end of the second driving unit and has a third through hole. The second cylinder is fixed to the first cylinder and has a stepped fourth through hole. The cover plate is fixed to the second cylinder and has a first groove. The third through hole, the fourth through hole, and the first groove are arranged opposite each other and form the second stepped hole.

[0023] The second bearing structure includes a second planar bearing and two second angular contact bearings. The two second angular contact bearings are spaced apart in the fourth through hole and are rotatably connected to the second connecting shaft. The second planar bearing is disposed in the first groove and is rotatably connected to the second connecting shaft.

[0024] In one embodiment, the second connecting shaft includes a first shaft body, a second shaft body, and a third shaft body, wherein:

[0025] The first shaft is rotatably disposed inside the second cylinder, and a third stepped hole is formed inside it;

[0026] The second shaft is inserted into the third stepped hole, and the end extending out of the third stepped hole is connected to the second fixture;

[0027] The third shaft body is installed at the end of the second stepped hole away from the second fixture and is rotatably connected to the second planar bearing;

[0028] The first elastic element is disposed in the third stepped hole and abuts between the second shaft and the third shaft.

[0029] In one embodiment, the measuring head is connected to the measuring instrument via a first fastening assembly, the first fastening assembly including a pressure head seat and a fastener, wherein:

[0030] The pressure head base includes a first rod and a plurality of clamping plates. The plurality of clamping plates are arranged around one end of the first rod and are spaced apart from each other. The end of the first rod away from the clamping plates is provided with a mounting groove for fixing the measuring head.

[0031] The measuring instrument's detection section is inserted within the space enclosed by the plurality of clamping pieces and is secured by the fasteners;

[0032] The measuring head is installed in the mounting slot.

[0033] In one embodiment, a first external thread is formed on the outer surface of the first rod near the clamping piece, and the fastener is a first nut, which is threadedly engaged with the first external thread.

[0034] In one embodiment, a second external thread is formed on the outer surface of the measuring head, and the mounting groove is a first threaded hole, which is threadedly engaged with the second external thread.

[0035] In one embodiment, the second drive unit, the third drive unit, and the fourth drive unit all include a drive assembly. The drive assembly includes a bracket, a turntable, a lead screw, and a sliding block. The bracket is mounted on the platform or the output end of the third drive unit. The lead screw is rotatably mounted on the bracket. The turntable is connected to the end of the lead screw. The sliding block is threaded onto the lead screw and forms the output end of the second drive unit, the third drive unit, or the fourth drive unit. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the scraping strength measuring instrument provided in one embodiment of this application.

[0037] Figure 2 This is a top view of the scraping strength measuring instrument provided in one embodiment of this application.

[0038] Figure 3 This is a right view of a scratch strength measuring instrument provided in one embodiment of this application.

[0039] Figure 4 This is a schematic diagram of the main shaft in a scraping strength measuring instrument provided in one embodiment of this application.

[0040] Figure 5 This is a cross-sectional view of the spindle in a scraping strength measuring instrument provided in one embodiment of this application.

[0041] Figure 6 This is a schematic diagram of the tail shaft structure in a scraping strength measuring instrument provided in one embodiment of this application.

[0042] Figure 7 This is a cross-sectional view of the tail shaft in a scraping strength measuring instrument provided in one embodiment of this application.

[0043] Figure 8 This is a schematic diagram of the module consisting of the detection unit, the first fastening component, and the measuring head in a scraping strength measuring instrument provided in one embodiment of this application.

[0044] Figure 9 This is a schematic diagram of the structure of the first fastening component in the scraping strength measuring instrument provided in one embodiment of this application.

[0045] Figure 10 This is a cross-sectional view of the first fastening component in the scratch strength measuring instrument provided in one embodiment of this application.

[0046] Figure label:

[0047] 10. Scraping strength measuring instrument; oo, first axis;

[0048] 100. Platform;

[0049] 200. Clamping module; 210. First drive unit; 211. Control box; 212. Motor; 220. Second drive unit; 221. First bracket; 222. First turntable; 223. First lead screw; 224. First sliding block; 230. Spindle; 231. First fixed seat; 232. First connecting shaft; 233. First fixture; 234. First stepped hole; 235. First base; 2351. First through hole; 236. Second base; 2361. Second through hole; 240. Tail shaft; 241. Second fixed seat; 2411. Second stepped hole; 242. Second connecting shaft; 2421. First shaft body; 2422, Second shaft; 2423, Third shaft; 2424, Third stepped hole; 243, First elastic element; 244, Second fixture; 245, First cylinder; 2451, Third through hole; 246, Second cylinder; 2461, Fourth through hole; 247, Cover plate; 2471, First groove; 248, Connecting plate; 250, First bearing structure; 251, First planar bearing; 252, First angular contact bearing; 260, Second bearing structure; 261, Second planar bearing; 262, Second angular contact bearing;

[0050] 300. Measuring module; 310. Third drive unit; 311. Second support; 312. Second turntable; 313. Second lead screw; 314. Second sliding block; 320. Fourth drive unit; 321. Third support; 322. Third turntable; 323. Third lead screw; 324. Third sliding block; 330. Measuring gauge; 331. Detection unit; 340. Measuring head;

[0051] 400, First fastening assembly; 410, Pressure head seat; 411, First rod body; 4111, Mounting groove; 4112, First external thread; 412, Multiple clamping plates; 420, Fastener;

[0052] 20. Rotating shaft. Detailed Implementation

[0053] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0054] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0055] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0059] The technical solutions provided by the embodiments of this application are described below with reference to the accompanying drawings.

[0060] See Figure 1 , Figure 2 as well as Figure 3 As shown, this application provides a scratch strength measuring instrument 10 for measuring the surface of a rotating shaft 20. The scratch strength measuring instrument 10 includes a stage 100, a clamping module 200, and a measuring module 300. The stage 100 supports the clamping module 200 and the measuring module 300. To ensure the stability of the overall structure during the measurement process, a suction cup is provided at the lower end of the stage 100 to mitigate vibrations during the measurement process, allowing the stage 100 to be stably positioned in the working position.

[0061] In the scratch strength measuring instrument 10, a clamping module 200 is mounted on a stage 100, and the clamping module 200 includes a first drive unit 210, a second drive unit 220, a main spindle 230, and a tail shaft 240. The output end of the first drive unit 210 is connected to the main spindle 230, and the output end of the first drive unit 210 is used to drive the clamping end of the main spindle 230 to rotate around a first axis oo. The output end of the second drive unit 220 is connected to the tail shaft 240, and the output end of the second drive unit 220 is used to drive the tail shaft 240 to move along the first axis oo. The clamping end of the tail shaft 240 is coaxially arranged with the clamping end of the main shaft 230, and the clamping end of the tail shaft 240 is used to clamp the rotating shaft 20. The clamping end of the tail shaft 240 is coaxially arranged with the clamping end of the main shaft 230 and clamps the rotating shaft 20, so that the circumferential runout of the rotating shaft 20 is less than 0.05mm when it rotates one revolution, so that the measurement process of the scraping strength measuring instrument 10 is more reliable. The movement of the second drive unit 220 relative to the main shaft 230 enables the scraping strength measuring instrument 10 to meet the detection of the rotating shaft 20 in the size range of 210mm-410mm. In one example, at least one of the first drive unit 210 and the main shaft 230 is fixed on the stage 100, and the second drive unit 220 is fixed on the stage 100 to facilitate the installation of the clamping module 200 on the stage 100. In another example, the first drive unit 210 includes a control box 211 and a motor 212, which is connected to the control box 211 and rotates the output of the motor 212 a corresponding number of times under the control of the control box 211.

[0062] The measurement module 300 includes a third drive unit 310, a fourth drive unit 320, a measuring dial indicator 330, and a measuring head 340. The third drive unit 310 is mounted on the stage 100, and its output provides power for movement along the first axis oo. The fourth drive unit 320 is mounted on the output of the third drive unit 310, and its output provides power for movement in the vertical direction. The measuring dial indicator 330 is fixed to the output of the fourth drive unit 320. The measuring head 340 is attached to the measuring dial indicator 330 and connected to the detection section 331 of the measuring dial indicator 330, so that the movement of the measuring head 340 is reflected in the detection section 331 and displayed on the dial of the measuring dial indicator 330. In one example, the measuring head 340 can be a diamond measuring structure to ensure the reliability of the measurement process. In another example, the measurement error of the measuring instrument 330 can be 0-5 gf, so that the actual measured value error of the above-mentioned scraping strength measuring instrument 10 is within 0-5 gf, which meets the error requirement.

[0063] When using the aforementioned scratch strength measuring instrument 10, the tail shaft 240 is first driven away from the main shaft 230 along the first axis oo by the output end of the second drive unit 220. The measuring gauge 330 and the measuring head 340 are then driven to move vertically upward by the output end of the fourth drive unit 320 to obtain an installation space suitable for rotating shafts 20 of different sizes, and to facilitate the installation of the rotating shaft 20 on the scratch strength measuring instrument 10. Then, the rotating shaft 20 to be tested is placed between the clamping end of the tail shaft 240 and the clamping end of the main shaft 230, and the second drive unit 220 is driven in the opposite direction. The output end of the second drive unit 220 drives the tail shaft 240 to move closer to the main shaft 230 along the first axis oo, so that the clamping end of the coaxially arranged tail shaft 240 and the clamping end of the main shaft 230 clamp the rotating shaft 20. The rotating shaft 20 is stably clamped, and the subsequent rotation process is relatively stable, resulting in high stability and reliability of the measurement. The output of the third drive unit 310 drives the fourth drive unit 320, the measuring gauge 330, and the measuring head 340 to move to the position to be tested on the rotating shaft 20. The fourth drive unit 320 is then driven in the reverse direction, and its output drives the measuring gauge 330 and the measuring head 340 to move downwards vertically. The measuring head 340 contacts the rotating shaft 20 to perform surface measurement. By selecting a suitable measuring gauge 330, the required measurement error can be determined, and by selecting a suitable measuring head 340, the required measurement pressure range can be obtained. Next, the output of the first drive unit 210 drives the clamping end of the main shaft 230 to rotate around the first axis oo. The clamping ends of the rotating shaft 20 and the tail shaft 240 rotate together, allowing the measuring head 340 and the measuring gauge 330 to measure one revolution of the rotating shaft 20. Furthermore, the output of the fourth drive unit 320 can adjust the number of rotations of the rotating shaft 20 to obtain a suitable measurement sampling range.

[0064] The spindle 230 has various structural forms; one preferred embodiment is described in the following document. Figure 4 as well as Figure 5As shown, the spindle 230 includes a first fixed seat 231, a first connecting shaft 232, and a first fixture 233. The first fixed seat 231 can be fixedly installed on the platform 100 by means of threaded connection, snap-fit ​​connection, welding, etc. The first fixed seat 231 is provided with a first stepped hole 234, which penetrates the thickness of the first fixed seat 231, and the center line of the first stepped hole 234 coincides with the first axis oo. The first connecting shaft 232 passes through the first stepped hole 234 and is connected to the output end of the first drive unit 210 via a coupling, sleeve, or other means. The first connecting shaft 232 is rotatably connected to the first stepped hole 234 via a first bearing structure 250, so that when the output end of the first drive unit 210 rotates, it can drive the first connecting shaft 232 to rotate within the first stepped hole 234. In one example, the first bearing structure 250 is engaged with the first stepped hole 234 to facilitate the installation and positioning of the first connecting shaft 232 within the first stepped hole 234. The first fixture 233 is installed on the end of the first connecting shaft 232 away from the first drive unit 210 via a convex-concave fit, snap-fit ​​connection, threaded connection, or other means, and the first fixture 233 forms the clamping end of the main shaft 230. In one example, the end of the first fixture 233 away from the first connecting shaft 232 has a mounting hole that mates with the rotating shaft 20.

[0065] For ease of assembly of spindle 230, please refer to [link / reference needed]. Figure 4 as well as Figure 5 As shown, the first fixing base 231 includes a first base body 235 and a second base body 236. The first base body 235 is fixed to the platform 100 by bolts, pins, etc., and has a first through hole 2351, which is a stepped structure with a large hole at one end and a small hole at the other end. The second base body 236 is fixed to the first base body 235 by bolts, pins, etc., and has a second through hole 2361, which is also a stepped structure with a large hole at one end and a small hole at the other end. The first through hole 2351 and the second through hole 2361 are arranged opposite each other, and the first through hole 2351 and the second through hole 2361 constitute a second stepped hole 2411. During assembly, the first seat 235 and the second seat 236 can be separated first. After the first bearing structure 250 and the first connecting shaft 232 are set on the first seat 235 and the second seat 236, the first seat 235 and the second seat 236 can be assembled, thus making it easier to assemble the spindle 230.

[0066] The first bearing structure 250 includes a first planar bearing 251 and two first angular contact bearings 252. The two first angular contact bearings 252 are spaced apart within the first through hole 2351 and are rotatably connected to the first connecting shaft 232. The first planar bearing 251 is disposed within the second through hole 2361 and is rotatably connected to the first connecting shaft 232. In the aforementioned main shaft 230, the first planar bearing 251 and the two first angular contact bearings 252 reliably support the first connecting shaft 232 within the first fixed seat 231, ensuring reliable movement of the first connecting shaft 232.

[0067] In one example, the size of the second through hole 2361 is smaller than the large end of the first through hole 2351, so that a first angular contact bearing 252 is engaged with the small end of the stepped first connecting shaft 232 and the first through hole 2351, another first angular contact bearing 252 is engaged between the end faces of the stepped first connecting shaft 232 and the second seat 236, and a first planar bearing 251 is engaged between the small end of the second stepped hole 2411 and the stepped first connecting shaft 232, so as to realize the rotational connection of the first bearing structure 250 and the first connecting shaft 232 within the first fixed seat 231.

[0068] The tail shaft 240 has various structural forms; one preferred embodiment is described in the following document. Figure 6 as well as Figure 7 As shown, the tail shaft 240 includes a second fixed base 241, a second connecting shaft 242, a first elastic element 243, and a second fixture 244. The second fixed base 241 is mounted to the output end of the second drive unit 220 via angle iron, a connecting plate 248, etc. The second fixed base 241 has a second stepped hole 2411, which is coaxially arranged with the first stepped hole 234. The second connecting shaft 242 is rotatably connected to the second stepped hole 2411 via a second bearing structure 260. The first elastic element 243 is disposed on the second connecting shaft 242 and is configured to drive the second connecting shaft 242 to extend and retract along the first axis oo. In one example, the second bearing structure 260 engages with the second stepped hole 2411 to facilitate the installation and positioning of the second connecting shaft 242 within the second stepped hole 2411. The second fixture 244 is mounted on the second connecting shaft 242 by means of a convex-concave fit, a snap-fit ​​connection, or a threaded connection, and the end of the second fixture 244 extending out of the second stepped hole 2411 forms the clamping end of the tail shaft 240. In one example, the end of the second fixture 244 away from the second connecting shaft 242 has a mounting hole that mates with the rotating shaft 20.

[0069] When the scraping strength measuring instrument 10 is used, after the rotating shaft 20 to be tested is placed between the clamping end of the tail shaft 240 and the clamping end of the main shaft 230, the output end of the second drive unit 220 drives the tail shaft 240 to contact the end of the rotating shaft 20, and the output end of the second drive unit 220 continues to drive the tail shaft 240. The second fixed seat 241 has the tendency to drive the second fixture 244 to continue moving towards the main shaft 230. The second connecting shaft 242 moves along the first axis oo towards the interior of the second fixed seat 241, and the first elastic member 243 is compressed so that the rotating shaft 20 is grounded between the first fixture 233 of the main shaft 230 and the second fixture 244 of the tail shaft 240, ensuring the stable clamping of the rotating shaft 20 and ensuring that the installation state of the rotating shaft 20 is relatively stable throughout the testing process. During the rotation process, when the output end of the first drive unit 210 rotates, it can drive the clamping end of the main shaft 230, the rotating shaft 20 and the second connecting shaft 242 to rotate together. The second connecting shaft 242 rotates in the second stepped hole 2411 under the support of the second bearing structure 260, ensuring that the rotating shaft 20 rotates stably.

[0070] For ease of assembly of the tail shaft 240, please refer to [link / reference needed]. Figure 6 as well as Figure 7 As shown, the second fixing base 241 includes a first cylinder 245, a second cylinder 246, and a cover plate 247. The first cylinder 245 is fixed to the output end of the second drive unit 220 by angle iron, and the first cylinder 245 has a third through hole 2451. The third through hole 2451 penetrates the thickness of the first cylinder 245 along the axial direction. The second cylinder 246 is fixed to the first cylinder 245 by means of threaded connection, welding, integral molding, bonding, etc., and the second cylinder 246 has a fourth through hole 2461. The fourth through hole 2461 penetrates the thickness of the first cylinder 245 along the axial direction, and the fourth through hole 2461 has a stepped structure with a large hole at one end and a small hole at the other end. The cover plate 247 is fixed to the second cylinder 246 by bolts, pins, etc., and the cover plate 247 has a first groove 2471, a third through hole 2451, a fourth through hole 2461, and the first groove 2471 arranged opposite each other. The third through hole 2451, the fourth through hole 2461, and the first groove 2471 form a second stepped hole 2411. During assembly, the first cylinder 245, the second cylinder 246, and the cover plate 247 can be separated first. After the second bearing structure 260 and the second connecting shaft 242 are set on the first cylinder 245 and the second cylinder 246, the first cylinder 245, the second cylinder 246, and the cover plate 247 can be assembled, thus making the assembly of the tail shaft 240 relatively convenient.

[0071] The second bearing structure 260 includes a second planar bearing 261 and two second angular contact bearings 262. The two second angular contact bearings 262 are spaced apart within the fourth through hole 2461 and are rotatably connected to the second connecting shaft 242. The second planar bearing 261 is disposed within the first groove 2471 and is rotatably connected to the second connecting shaft 242. In the tail shaft 240, the second planar bearing 261 and the two second angular contact bearings 262 reliably support the second connecting shaft 242 within the second fixed seat 241, ensuring reliable movement of the second connecting shaft 242.

[0072] To further facilitate the assembly of the tail shaft 240, please refer to [link / reference]. Figure 7 As shown, the second connecting shaft 242 includes a first shaft body 2421, a second shaft body 2422, and a third shaft body 2423. The first shaft body 2421 is rotatably disposed within the second cylindrical body 246, and a third stepped hole 2424 is formed inside the first shaft body 2421. The second shaft body 2422 is inserted into the third stepped hole 2424, and the end of the second shaft body 2422 extending out of the third stepped hole 2424 is fixedly connected to the second fixture 244 via a convex-concave fit, threaded connection, or other means. The third shaft body 2423 covers the end of the second stepped hole 2411 away from the second fixture 244, and the third shaft body 2423 is rotatably connected to the second planar bearing 261. A first elastic element 243 is disposed within the third stepped hole 2424, and the first elastic element 243 abuts against the second shaft body 2422 and the third shaft body 2423. In the aforementioned tail shaft 240, the second connecting shaft 242 is divided into a first shaft body 2421, a second shaft body 2422, and a third shaft body 2423 and fitted together to facilitate the connection of the first elastic member 243 and the second connecting shaft 242. During operation, the second fixture 244 drives the second shaft body 2422 to move toward the inside of the second fixed seat 241. The second shaft body 2422 slides inside the first shaft body 2421 and presses the first elastic member 243 relative to the third shaft body 2423 to achieve the contact of the rotating shaft 20.

[0073] In one example, the third through hole 2451 can be a stepped hole, and the outer surface of the second fixture 244 is provided with two baffles spaced apart along its axial direction. One baffle allows the second fixture 244 to slide with the third through hole 2451, and the other baffle allows the second fixture 244 to abut against the small end of the third through hole 2451 when it moves to its limit, so as to ensure the stability of the movement of the second fixture 244.

[0074] In another example, the fourth through hole 2461 can be a stepped hole, the opening size of the first groove 2471 is smaller than the large end of the fourth through hole 2461, the outer surfaces of the first shaft 2421 and the third shaft 2423 are both stepped structures, a second angular contact bearing 262 is engaged with the small end of the first shaft 2421 and the fourth through hole 2461, another second angular contact bearing 262 is engaged between the first connecting shaft 232 and the third shaft 2423 and the cover plate 247, and a second planar bearing 261 is engaged between the third shaft 2423 and the bottom of the groove of the first groove 2471, so as to realize the rotational connection of the second bearing structure 260 and the second connecting shaft 242 within the second fixed seat 241.

[0075] There are various ways to assemble the measuring head 340 and the measuring gauge 330. One preferred embodiment is described in [reference needed]. Figure 3 as well as Figure 8 As shown, the measuring head 340 is connected to the measuring instrument 330 via a first fastening assembly 400. The first fastening assembly 400 includes a pressure head seat 410 and a fastener 420. The pressure head seat 410 includes a first rod 411 and multiple clamping plates 412. In one example, the number of clamping plates 412 can be two, three, four, or more. The outer contour of the clamping plates 412 can match the detection part 331 of the measuring instrument 330 for subsequent clamping and fixing. The multiple clamping plates 412 are arranged around one end of the first rod 411, and adjacent clamping plates 412 are spaced apart. The detection part 331 of the measuring instrument 330 is inserted into the space enclosed by the multiple clamping plates 412, and the detection part 331 is fastened to the multiple clamping plates 412 by the fastener 420 to achieve a convenient and reliable fixed connection between the pressure head seat 410 and the detection part 331. The first rod 411 has a mounting groove 4111 at its end away from the clamping piece 412. This mounting groove 4111 is used to fix the measuring head 340. The measuring head 340 is installed in the mounting groove 4111, so that the pressure head seat 410 and the measuring head 340 can be fixedly connected in a convenient and reliable manner, thereby enabling the assembly of the measuring head 340 and the measuring gauge 330 in a convenient and reliable manner. In one example, the clamping piece 412 can be a metal spring, so that multiple clamping pieces 412 can gather and adhere to the outer surface of the detection part 331 under the action of the fastener 420.

[0076] For easier fastening of clamping piece 412, please refer to... Figure 8 , Figure 9 as well as Figure 10As shown, specifically, a first external thread 4112 is formed on the outer surface of the first rod 411 near the clamping piece 412. The fastener 420 is a first nut, which is threadedly engaged with the first external thread 4112. When the fastener 420 is locked on the outer surface of the first rod 411 near the clamping piece 412, the threaded engagement of the first nut and the first external thread 4112 causes the end of the clamping piece 412 near the first rod 411 to tighten and move toward the interior of the space formed by the multiple clamping pieces 412, so as to fit against the outer surface of the detection part 331. Furthermore, by adjusting the position of the first nut on the first rod 411, the clamping force between the clamping piece 412 and the first rod 411 can be adjusted, which facilitates the control of the fixed connection between the pressure head seat 410 and the detection part 331.

[0077] For easy connection of the pressure head holder 410 and the measuring head 340, please refer to... Figure 8 , Figure 9 as well as Figure 10 As shown, specifically, a second external thread is formed on the outer surface of the measuring head 340, and the mounting groove 4111 is a first threaded hole. The first threaded hole and the second external thread are threadedly engaged. When the measuring head 340 is installed in the mounting groove 4111, the first threaded hole and the second external thread are threadedly engaged so that the measuring head 340 is fixedly connected in the mounting groove 4111, thereby making it easier to fix the measuring head 340.

[0078] The second drive unit 220, the third drive unit 310, and the fourth drive unit 320 can be electrically driven, such as a drive motor combined with a telescopic mechanism. Alternatively, the second drive unit 220, the third drive unit 310, and the fourth drive unit 320 can also be manually adjustable; see the attached document for details. Figure 2 as well as Figure 3 As shown, the second drive unit 220, the third drive unit 310, and the fourth drive unit 320 all include drive components, which include a bracket, a turntable, a lead screw, and a sliding block. The second drive unit 220 has a first bracket 221, a first turntable 222, a first lead screw 223, and a first sliding block 224. The first bracket 221 is mounted on the platform 100. The first lead screw 223 is rotatably mounted on the first bracket 221 and is arranged along the first axis oo. The first turntable 222 is connected to the end of the first lead screw 223. The first sliding block 224 is threadedly connected to the first lead screw 223 and is connected to the tail shaft 240 to form the output end of the second drive unit 220. During operation, the operator manually rotates the first turntable 222 to drive the first lead screw 223 to rotate. The first sliding block 224 slides on the first lead screw 223 and drives the tail shaft 240 to move.

[0079] The third drive unit 310 has a second bracket 311, a second turntable 312, a second lead screw 313, and a second sliding block 314. The second bracket 311 is mounted on the platform 100. The second lead screw 313 is rotatably mounted on the second bracket 311 and is arranged parallel to the first axis oo. The second turntable 312 is connected to the end of the second lead screw 313. The second sliding block 314 is threadedly connected to the second lead screw 313 and is connected to the fourth drive unit 320 to form the output end of the third drive unit 310. During operation, the operator manually rotates the second turntable 312 to drive the second lead screw 313 to rotate. The second sliding block 314 slides on the second lead screw 313 and drives the fourth drive unit 320 to move left and right.

[0080] The fourth drive unit 320 has a third bracket 321, a third turntable 322, a third lead screw 323, and a third sliding block 324. The third bracket 321 is mounted on the second sliding block 314. The third lead screw 323 is rotatably mounted on the third bracket 321 and is arranged in a vertical direction. The third turntable 322 is connected to the end of the third lead screw 323. The third sliding block 324 is threadedly connected to the third lead screw 323 and is connected to the measuring instrument 330 to form the output end of the fourth drive unit 320. During operation, the operator manually rotates the third turntable 322 to drive the third lead screw 323 to rotate. The third sliding block 324 slides on the third lead screw 323 and drives the measuring instrument 330 and the measuring head 340 to move up and down.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A scratch strength measuring instrument, characterized in that, include: Platform; A clamping module, installed on the platform, includes a first drive unit, a second drive unit, a main spindle, and a tail spindle. The output end of the first drive unit is connected to the main spindle and is used to drive the clamping end of the main spindle to rotate around a first axis. The output end of the second drive unit is connected to the tail spindle and is used to drive the tail spindle to move along the first axis. The clamping end of the tail spindle is coaxial with the clamping end of the main spindle and is used to clamp the rotating shaft. The measurement module includes a third drive unit, a fourth drive unit, a measuring instrument, and a measuring head. The third drive unit is mounted on the platform and its output end is used to provide power for movement along the first axis. The fourth drive unit is mounted on the output end of the third drive unit and its output end is used to provide power for movement in the vertical direction. The measuring instrument is fixed to the output end of the fourth drive unit, and the measuring head is locked onto the measuring instrument and connected to the detection part of the measuring instrument.

2. The scraping strength measuring instrument according to claim 1, characterized in that, The spindle includes: A first fixed seat is installed on the platform and has a first stepped hole that penetrates its thickness. A first connecting shaft passes through the first stepped hole and is connected to the output end of the first drive unit. The first connecting shaft is rotatably connected to the first stepped hole through a first bearing structure. A first fixture is installed at the end of the first connecting shaft away from the first drive unit and forms the clamping end of the spindle.

3. The scraping strength measuring instrument according to claim 2, characterized in that, The first fixing base includes a first base body and a second base body. The first base body is fixed to the platform and has a stepped first through hole. The second base body is fixed to the first base body and has a stepped second through hole. The first through hole and the second through hole are arranged opposite each other and form the second stepped hole. The first bearing structure includes a first planar bearing and two first angular contact bearings. The two first angular contact bearings are spaced apart in the first through hole and are rotatably connected to the first connecting shaft. The first planar bearing is disposed in the second through hole and is rotatably connected to the first connecting shaft.

4. The scraping strength measuring instrument according to claim 1, characterized in that, The tail shaft includes: The second fixing base is installed at the output end of the second drive unit and has a second stepped hole; The second connecting shaft is rotatably connected to the second stepped hole via a second bearing structure; A first elastic element is disposed on the second connecting shaft and configured to drive the second connecting shaft to extend or retract along the first axis; The second fixture is mounted on the second connecting shaft and extends out of the second stepped hole to form the clamping end of the tail shaft.

5. The scraping strength measuring instrument according to claim 4, characterized in that, The second fixing base includes a first cylinder, a second cylinder, and a cover plate. The first cylinder is fixed to the output end of the second driving unit and has a third through hole. The second cylinder is fixed to the first cylinder and has a stepped fourth through hole. The cover plate is fixed to the second cylinder and has a first groove. The third through hole, the fourth through hole, and the first groove are arranged opposite each other and form the second stepped hole. The second bearing structure includes a second planar bearing and two second angular contact bearings. The two second angular contact bearings are spaced apart in the fourth through hole and are rotatably connected to the second connecting shaft. The second planar bearing is disposed in the first groove and is rotatably connected to the second connecting shaft.

6. The scraping strength measuring instrument according to claim 5, characterized in that, The second connecting shaft includes a first shaft body, a second shaft body, and a third shaft body, wherein: The first shaft is rotatably disposed inside the second cylinder, and a third stepped hole is formed inside it; The second shaft is inserted into the third stepped hole, and the end extending out of the third stepped hole is connected to the second fixture; The third shaft body is installed at the end of the second stepped hole away from the second fixture and is rotatably connected to the second planar bearing; The first elastic element is disposed in the third stepped hole and abuts between the second shaft and the third shaft.

7. The scraping strength measuring instrument according to claim 1, characterized in that, The measuring head is connected to the measuring instrument via a first fastening assembly, the first fastening assembly including a pressure head seat and a fastener, wherein: The pressure head base includes a first rod and a plurality of clamping plates. The plurality of clamping plates are arranged around one end of the first rod and are spaced apart from each other. The end of the first rod away from the clamping plates is provided with a mounting groove for fixing the measuring head. The measuring instrument's detection section is inserted within the space enclosed by the plurality of clamping pieces and is secured by the fasteners; The measuring head is installed in the mounting slot.

8. The scraping strength measuring instrument according to claim 7, characterized in that, The first rod body has a first external thread formed on its outer surface near the clamping piece, and the fastener is a first nut, which is threadedly engaged with the first external thread.

9. The scraping strength measuring instrument according to claim 7, characterized in that, A second external thread is formed on the outer surface of the measuring head, and the mounting groove is a first threaded hole, which is threadedly engaged with the second external thread.

10. The scraping strength measuring instrument according to claim 8, characterized in that, The second drive unit, the third drive unit, and the fourth drive unit all include a drive assembly. The drive assembly includes a bracket, a turntable, a lead screw, and a sliding block. The bracket is mounted on the platform or the output end of the third drive unit. The lead screw is rotatably mounted on the bracket. The turntable is connected to the end of the lead screw. The sliding block is threaded onto the lead screw and forms the output end of the second drive unit, the third drive unit, or the fourth drive unit.

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