A microscopic observation device used in fatigue fracture experiments

Abstract

The present invention relates to the technical field of experimental equipment, and in particular, to a microscopic observation device used in fatigue fracture experiments. It includes a clamp, a mobile platform and a microscopic observation mechanism, wherein the clamp is used to be sleeved on a column, the mobile platform is arranged on the clamp, and the microscopic observation mechanism is arranged on the mobile platform and is used to observe cracks on a test piece. Since the clamp is sleeved on the column, the height of the clamp on the column can be adjusted, and since the mobile platform is arranged on the clamp, when adjusting the height of the clamp on the column, the mobile platform can be driven to move at the same time, and the distance between the mobile platform and the experimental platform can be adjusted. Therefore, by adjusting the height of the clamp on the column, a suitable distance is maintained between the mobile platform and the experimental platform, which can ensure that the microscopic observation mechanism arranged on the mobile platform can observe the test piece on the experimental platform, and prevent the mobile platform from interfering with other mechanisms.

Description

Technical Field

[0001] The invention relates to the technical field of experimental equipment, and in particular to a microscopic observation device applied to fatigue fracture experiments. Background Art

[0002] During the fatigue fracture test of composite materials, the test specimens made of composite materials are placed on the experimental platform. By applying a large load to the test specimen, cracks will appear on the surface of the test specimen. The cracks are observed using a microscopic observation device, and relevant data is obtained and calculated to detect the mechanical properties of the composite material.

[0003] During the above-mentioned experiments, a microscopic observation device is usually placed on an experimental platform, which takes up a large space and is prone to interfere with other experimental devices on the experimental platform, which may cause errors in the observation results of the specimen by the microscopic observation device. Summary of the invention

[0004] The problem solved by the present invention is how to avoid interference between a microscopic observation device and other experimental devices.

[0005] In order to solve the above problems, the present invention provides a microscopic observation device used in fatigue fracture experiments, including a clamp, a mobile platform and a microscopic observation mechanism, the clamp is used to be sleeved on a column, the mobile platform is arranged on the clamp, the microscopic observation mechanism is arranged on the mobile platform, and is used to observe cracks on the test piece.

[0006] Optionally, the mobile platform includes a first mobile mechanism, a second mobile mechanism and a third mobile mechanism, the first mobile mechanism is arranged on the clamp, the first mobile mechanism is vertically arranged, the second mobile mechanism is slidably connected to the first mobile mechanism along the vertical direction, the third mobile mechanism is slidably connected to the second mobile mechanism along the front-to-back direction, and the microscopic observation mechanism is slidably connected to the third mobile mechanism along the left-right direction.

[0007] Optionally, two clamps are provided, and the two clamps are respectively connected to the upper and lower ends of the first moving mechanism.

[0008] Optionally, the clamp includes two collars and a bolt, the opening sides of the two collars are arranged opposite to each other, and the bolt is arranged at the connection between the two collars.

[0009] Optionally, an anti-slip filler is provided between the column and the clamp.

[0010] Optionally, the first moving mechanism includes a first drive motor, a first screw rod and a first connecting member, the first drive motor is arranged on the clamp, and the transmission shaft of the first drive motor is arranged vertically, the end of the first screw rod is connected to the transmission shaft of the first drive motor, and the first connecting member is slidably connected to the first screw rod;

[0011] The second moving mechanism includes a bracket, a second drive motor, a second screw rod and a second connecting member, the bracket is arranged on the first connecting member, the second drive motor is arranged on the bracket, and the transmission shaft of the second drive motor is arranged along the front-to-back direction, the end of the second screw rod is connected to the transmission shaft of the second drive motor, and the second connecting member is slidably connected to the second screw rod; the third moving mechanism is arranged on the second connecting member.

[0012] Optionally, the first moving mechanism also includes an optical axis support, a first optical axis and a first slider, the optical axis support is arranged on the clamp, the first slider is slidably connected to the first optical axis, the first connecting member includes a first connecting block and a second connecting block, the first connecting block is slidably connected to the first screw rod, the first connecting block and the second connecting block are connected and used to clamp the first slider, and the second connecting member is connected to the first connecting block.

[0013] Optionally, the second moving mechanism further includes a second optical axis and a second slider, the second optical axis is arranged on the bracket, the second slider is slidably connected to the second optical axis, the second connecting member is provided with a slot, and the second slider is arranged in the slot.

[0014] Optionally, the third moving mechanism includes a third drive motor, a third screw rod, a third connecting member and a guide rail, the guide rail is arranged in the left-right direction, the microscopic observation mechanism is arranged at one end of the guide rail, and the third drive motor is arranged at the other end of the guide rail, the transmission shaft of the third drive motor is arranged in the left-right direction, the end of the third screw rod is connected to the transmission shaft of the third drive motor, the third connecting member is connected to the second connecting member, and the third connecting member is slidably connected to the third screw rod.

[0015] Optionally, the microscopic observation device for fatigue fracture experiment further includes a control box, and the control box is communicatively connected with the first drive motor, the second drive motor and the third drive motor.

[0016] The technical effect of the present invention is as follows: the clamp is sleeved on the column, and the height of the clamp on the column can be adjusted. Since the mobile platform is arranged on the clamp, when adjusting the height of the clamp on the column, the mobile platform can be driven to move at the same time, and the distance between the mobile platform and the experimental platform can be adjusted. Therefore, by adjusting the height of the clamp on the column, the mobile platform and the experimental platform are kept at a suitable distance, which can ensure that the microscopic observation mechanism arranged on the mobile platform can observe the specimen on the experimental platform, and prevent the mobile platform from interfering with other mechanisms. At the same time, since the column is arranged on the foundation, the stability is strong, thereby ensuring the stability of the clamp sleeved on the column and the mobile platform arranged on the clamp, and then ensuring the stability of the microscopic observation mechanism arranged on the mobile platform, preventing the microscopic observation mechanism from being displaced due to disturbance, and avoiding affecting the observation data. In addition, the clamp is arranged on the column, and the angle of the microscopic observation mechanism can be adjusted by rotating the clamp, so as to facilitate the rapid alignment of the field of view of the microscopic observation mechanism with the specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a microscopic observation device applied to fatigue fracture experiment according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of a clamp according to an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of a first connecting member according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of a connecting plate according to an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the internal structure of a control box according to an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the external structure of the control box according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 1. Clamp; 11. Ring; 21. First moving mechanism; 211. First driving motor; 212. First screw rod; 213. First connecting piece; 214. First optical axis support; 215. First optical axis; 22. Second moving mechanism; 221. Bracket; 222. Second driving motor; 223. Second screw rod; 224. Second connecting piece; 2241. Slot; 225. Second optical axis support; 226. Second optical axis; 23. Third moving mechanism; 231. Third driving motor; 232. The third screw rod; 233, guide rail; 234, connecting plate; 2341, first connecting area; 2342, second connecting area; 2343, third connecting area; 235, third slider; 3, microscopic observation mechanism; 4, control box; 41, power supply; 42, single-chip microcomputer; 43, motor drive board; 441, up button; 442, down button; 443, forward button; 444, backward button; 445, right button; 446, left button; 45, speed adjustment knob; 46, power indicator light. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In this article, an XYZ coordinate axis is set, where the positive direction of the X axis represents the front, the reverse direction of the X axis represents the back, the positive direction of the Y axis represents the left, the reverse direction of the Y axis represents the right, the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom.

[0027] In order to solve the above technical problems, Figure 1 As shown, an embodiment of the present invention discloses a microscopic observation device used for fatigue fracture experiments, including a clamp 1, a mobile platform and a microscopic observation mechanism 3. The clamp 1 is used to be sleeved on a column, the mobile platform is arranged on the clamp 1, and the microscopic observation mechanism 3 is arranged on the mobile platform and is used to observe cracks on a test piece.

[0028] The columns are vertically arranged on the foundation to support the experimental platform, and some of the columns pass through the experimental platform and are located above the experimental platform. The test piece is arranged on the experimental platform, and the clamp 1 is arranged on the column located above the experimental platform. The microscopic observation mechanism 3 includes a microscope and a camera, the camera is connected to the eyepiece of the microscope, and the objective lens of the microscope is used to align the test piece. The clamp 1 and the column can be connected by interference fit.

[0029] In this embodiment, when the mobile platform is directly set on the experimental platform, or the distance between the mobile platform and the experimental platform is small, it is easy to interfere with other experimental mechanisms on the experimental platform; and when the distance between the mobile platform and the experimental platform is large, the limit observation mechanism set on the mobile platform is difficult to observe the test piece set on the experimental platform. Since the clamp 1 is set on the column, the height of the clamp 1 on the column can be adjusted. Since the mobile platform is set on the clamp 1, when adjusting the height of the clamp 1 on the column, the mobile platform can be driven to move at the same time, and the distance between the mobile platform and the experimental platform can be adjusted.

[0030] In summary, since the clamp 1 is sleeved on the column, the height of the clamp 1 on the column can be adjusted. Since the mobile platform is arranged on the clamp 1, when adjusting the height of the clamp 1 on the column, the mobile platform can be driven to move at the same time, and the distance between the mobile platform and the experimental platform can be adjusted. Therefore, by adjusting the height of the clamp 1 on the column, the mobile platform and the experimental platform are kept at a suitable distance, which can ensure that the microscopic observation mechanism 3 arranged on the mobile platform can observe the specimen on the experimental platform, and prevent the mobile platform from interfering with other mechanisms. At the same time, since the column is arranged on the foundation, the stability is strong, thereby ensuring the stability of the clamp 1 sleeved on the column and the mobile platform arranged on the clamp 1, and then ensuring the stability of the microscopic observation mechanism 3 arranged on the mobile platform, preventing the microscopic observation mechanism 3 from being displaced due to disturbance, and avoiding affecting the observation data. In addition, the clamp 1 is arranged on the column, and the angle of the microscopic observation mechanism 3 can be adjusted by rotating the clamp 1, so as to facilitate the rapid alignment of the field of view of the microscopic observation mechanism 3 with the specimen.

[0031] Alternatively, if Figure 1 As shown, the mobile platform includes a first mobile mechanism 21, a second mobile mechanism 22 and a third mobile mechanism 23. The first mobile mechanism 21 is arranged on the clamp 1, and the first mobile mechanism 21 is vertically arranged. The second mobile mechanism 22 is slidably connected to the first mobile mechanism 21 along the vertical direction, and the third mobile mechanism 23 is slidably connected to the second mobile mechanism 22 along the front-to-back direction. The microscopic observation mechanism 3 is slidably connected to the third mobile mechanism 23 along the left-right direction.

[0032] The test piece is arranged on the right side of the microscopic observation mechanism 3 .

[0033] In this embodiment, the first moving mechanism 21 is arranged vertically, and when the second moving mechanism 22 slides relative to the first moving mechanism 21, the second moving mechanism 22 moves in the vertical direction. Since the third moving mechanism 23 is arranged on the second moving mechanism 22 and the microscopic observation mechanism 3 is arranged on the third moving mechanism 23, when the second moving mechanism 22 moves in the vertical direction, the third moving mechanism 23 and the microscopic observation mechanism 3 can be driven to move in the vertical direction. Similarly, the second moving mechanism 22 is arranged in the front-to-back direction, and when the third moving mechanism 23 slides relative to the second moving mechanism 22, the third moving mechanism 23 moves in the front-to-back direction. Since the microscopic observation mechanism 3 is arranged on the third moving mechanism 23, the third moving mechanism 23 moves in the front-to-back direction, and can drive the microscopic observation mechanism 3 to move in the front-to-back direction. During the movement of the microscopic observation mechanism 3 in the vertical direction and in the front-to-back direction, the field of view of the microscopic observation mechanism 3 can be accurately aligned to a specific position on the specimen, so as to facilitate the observation of the specimen.

[0034] At the same time, the third moving mechanism 23 is arranged in the left-right direction, and when the microscopic observation mechanism 3 slides relative to the third moving mechanism 23, the microscopic observation mechanism 3 moves in the left-right direction. During the movement of the microscopic observation mechanism 3 in the front-back direction, the linear distance between the microscopic observation mechanism 3 and the specimen can be adjusted to ensure the clarity of the field of view of the microscopic observation mechanism 3.

[0035] Alternatively, if Figure 1 As shown, two clamps 1 are provided, and the two clamps 1 are respectively connected to the upper and lower ends of the first moving mechanism 21 .

[0036] Wherein, two clamps 1 are both sleeved on the pillars.

[0037] Since the second moving mechanism 22 is arranged on the first moving mechanism 21, the third moving mechanism 23 is arranged on the second moving mechanism 22, and the microscopic observation mechanism 3 is arranged on the third moving mechanism 23, the first moving mechanism 21 simultaneously carries the second moving mechanism 22, the third moving mechanism 23 and the microscopic observation mechanism 3. When only one clamp 1 is arranged, the first moving mechanism 21 is a cantilever structure, and the second moving mechanism 22, the third moving mechanism 23 and the microscopic observation mechanism 3 are arranged on the first moving mechanism 21, which easily generates an eccentric load on the first moving mechanism 21, causing the first moving mechanism 21 to deform, and the second moving mechanism 22, the third moving mechanism 23 and the microscopic observation mechanism 3 to have unstable structures, which affects the accuracy of the observation data of the microscopic observation mechanism 3.

[0038] In this embodiment, two clamps 1 are arranged on the column, and the upper and lower ends of the first moving mechanism 21 are respectively connected to one of the clamps 1, so that the upper and lower ends of the first moving mechanism 21 can be assembled on the column at the same time. Therefore, by arranging two clamps 1 on the column and connecting the upper and lower ends of the first moving mechanism 21 to one of the clamps 1, the rigidity of the first moving mechanism 21 can be improved, and the second moving mechanism 22, the third moving mechanism 23 and the microscopic observation mechanism 3 are arranged on the first moving mechanism 21, so that it is difficult for the first moving mechanism 21 to deform, thereby ensuring the structural stability of the second moving mechanism 22, the third moving mechanism 23 and the microscopic observation mechanism 3, and further ensuring the accuracy of the observation data of the microscopic observation mechanism 3.

[0039] Preferably, the clamp 1 is made of nylon material.

[0040] In this embodiment, since the clamp 1 needs to bear the entire weight of the mobile platform, when the strength of the clamp 1 is relatively low, it is easy to break, thereby destroying the stability of the mobile platform, and further destroying the stability of the microscopic observation mechanism 3, and affecting the accuracy of the observation data of the microscopic observation mechanism 3. The clamp 1 is made of nylon material, and the strength of the clamp 1 is relatively high. Even if it bears the entire weight of the mobile platform, it is difficult to break, thereby ensuring the stability of the mobile platform, and further ensuring the stability of the microscopic observation mechanism 3 and the accuracy of the observation data of the microscopic observation mechanism 3.

[0041] Alternatively, if Figure 2 As shown, the clamp 1 includes two collars 11 and bolts. The opening sides of the two collars 11 are arranged opposite to each other, and the bolts are arranged at the connection between the two collars 11.

[0042] The collar 11 is provided with a threaded hole for the bolt to pass through. When the two collars 11 are arranged opposite to each other, the threaded holes on the two collars 11 are coaxially distributed, and the bolt passes through the two threaded holes in sequence and is fastened with a nut at the other end. At the same time, the two collars 11 are both arranged in a semicircular ring shape. In addition, a spring washer is also arranged on the bolt, and the spring washer is located between the nut and the collar 11.

[0043] In this embodiment, two collars 11 are arranged on the column opposite to each other, and bolts are passed through the threaded holes to connect the two collars 11. When observing the specimen during the experiment, the bolts are tightened to increase the friction between the collar 11 and the column, prevent the collar 11 from sliding on the column, improve the stability of the clamp 1, and further improve the stability of the microscopic observation mechanism 3. When adjusting the height of the clamp 1 on the column, the bolts are loosened to reduce the friction between the collar 11 and the column, facilitate the sliding of the collar 11 on the column, and the height of the clamp 1 on the column can be adjusted more easily.

[0044] Optionally, an anti-slip filler is suitable for being arranged between the column and the clamp 1 .

[0045] Among them, anti-slip fillers include fillers with relatively rough surfaces such as paper tape and electrical tape.

[0046] In this embodiment, since the contact surface between the column and the clamp 1 is relatively smooth, the friction coefficient is small, and the friction force is small, the clamp 1 may slide when it is mounted on the column, affecting the stability of the mobile platform. Before mounting the clamp 1, rough fillers such as paper tape and electrical tape are set on the column in advance. Afterwards, when mounting the clamp 1, the clamp 1 is mounted on the area on the column where rough fillers such as paper tape and electrical tape are set. The friction coefficient between the clamp 1 and the rough fillers such as paper tape and electrical tape is large, and the friction force is also large, which can prevent the clamp 1 from sliding on the column, and facilitate ensuring the stability of the mobile platform.

[0047] Alternatively, if Figure 1 As shown, the first moving mechanism 21 includes a first drive motor 211, a first screw rod 212 and a first connecting member 213. The first drive motor 211 is arranged on the clamp 1, and the transmission shaft of the first drive motor 211 is arranged vertically. The end of the first screw rod 212 is connected to the transmission shaft of the first drive motor 211, and the first connecting member 213 is slidably connected to the first screw rod 212;

[0048] The second moving mechanism 22 includes a bracket 221, a second drive motor 222, a second screw rod 223 and a second connecting member 224. The bracket 221 is arranged on the first connecting member 213, the second drive motor 222 is arranged on the frame, and the transmission shaft of the second drive motor 222 is arranged along the front-to-back direction, the end of the second screw rod 223 is connected to the transmission shaft of the second drive motor 222, and the second connecting member 224 is slidably connected to the second screw rod 223; the third moving mechanism 23 is arranged on the second connecting member 224.

[0049] The first connecting member 213 is provided with a first screw nut, which is threadedly connected to the first screw 212, and the first screw 212 is vertically arranged. The second connecting member 224 is provided with a second screw nut, which is threadedly connected to the second screw 223, and the second screw 223 is horizontally arranged along the front-rear direction.

[0050] In this embodiment, the first drive motor 211 is started to drive the first screw rod 212 to rotate. Since the first screw rod nut is threadedly connected to the first screw rod 212, the first screw rod nut moves along the extension direction of the first screw rod 212 during the rotation of the first screw rod 212; since the first screw rod 212 is vertically arranged, the first screw rod nut moves in the vertical direction; since the first screw rod nut is arranged in the first connecting member 213, the first connecting member 213 can be driven to move in the vertical direction during the movement of the first screw rod nut; at the same time, since the bracket 221 is arranged on the first connecting member 213, the bracket 221 can be driven to move in the vertical direction during the movement of the first connecting member 213.

[0051] The second driving motor 222 is started, driving the second screw rod 223 to rotate. Since the second screw rod nut is threadedly connected to the second screw rod 223, during the rotation of the second screw rod 223, the second screw rod nut moves along the extension direction of the second screw rod 223; since the second screw rod 223 is arranged along the front-to-back direction, the second screw rod nut moves along the front-to-back direction; since the second screw rod nut is arranged in the second connecting member 224, the second connecting member 224 can be driven to move in the front-to-back direction during the movement of the second screw rod nut; at the same time, since the third moving mechanism 23 is arranged on the second connecting member 224, the second connecting member 224 can be driven to move in the front-to-back direction during the movement of the third moving mechanism 23.

[0052] In summary, the first driving motor 211 is started, driving the first connecting member 213 to move in the vertical direction. Since it is arranged on the first connecting member 213, it can drive the bracket 221 to move in the vertical direction; since the second connecting member 224 is arranged on the bracket 221, it can drive the second connecting member 224 to move in the vertical direction; since the third moving mechanism 23 is arranged on the second connecting member 224, it can drive the third moving mechanism 23 to move in the vertical direction; since the microscopic observation mechanism 3 is arranged on the third moving mechanism 23, it can drive the microscopic observation mechanism 3 to move in the vertical direction.

[0053] The second driving motor 222 is started, driving the second connecting member 224 to move in the front-to-back direction. Since the third moving mechanism 23 is arranged on the second connecting member 224, the third moving mechanism 23 can be driven to move in the front-to-back direction. Since the microscopic observation mechanism 3 is arranged on the third moving mechanism 23, the microscopic observation mechanism 3 can be driven to move in the front-to-back direction.

[0054] Alternatively, if Figure 1 and Figure 3As shown, the first moving mechanism 21 also includes a first optical axis support 214, a first optical axis 215 and a first slider, the first optical axis support 214 is arranged on the clamp 1, the first slider is slidably connected to the first optical axis 215, the first connecting member 213 includes a first connecting block 2131 and a second connecting block 2132, the first connecting block 2131 and the second connecting block 2132 are connected, the first connecting block 2131 is slidably connected to the first screw rod 212, the first connecting block 2131 and the second connecting block 2132 are connected, and are used to clamp the first slider.

[0055] There are two first optical axis supports 214, which are respectively arranged on the two clamps 1 in a one-to-one correspondence, and the two ends of the first optical axis 215 are respectively connected to the two first optical axis supports 214, and the first optical axis 215 is arranged vertically. The first slider is located between the first connecting block 2131 and the second connecting block 2132, and the first connecting block 2131 and the second connecting block 2132 are connected by bolts.

[0056] In this embodiment, a first optical axis 215 is provided, and the first connecting member 213 can be guided during the movement of the first connecting member 213 in the vertical direction. Since the first connecting member 213 needs to bear the weight of the second moving mechanism 22 and the third moving mechanism 23 at the same time, the torque is relatively large, and the first connecting member 213 is provided with a first connecting block 2131 and a second connecting block 2132, and the first connecting block 2131 and the second connecting block 2132 are connected by bolts. Since the first slider is provided on the first connecting block 2131 and the second connecting block 2132, tightening the bolts can increase the clamping force of the first connecting block 2131 and the second connecting block 2132 on the first slider, and prevent the first slider and the first connecting member 213 from separating, thereby improving the stability of the structure of the first moving mechanism 21. At the same time, loosening the bolts can reduce the clamping force of the first connecting block 2131 and the second connecting block 2132 on the first slider, and the first slider and the first connecting member 213 can be separated more easily.

[0057] Alternatively, if Figure 1 As shown, the second moving mechanism 22 also includes a second optical axis support 225, a second optical axis 226 and a second slider. The second optical axis support 225 is arranged on the frame, the second optical axis 226 is arranged on the second optical axis support 225, the second slider is slidably connected to the second optical axis 226, and a slot 2241 is opened on the second connecting member 224, and the second slider is arranged in the slot 2241.

[0058] There are two second optical axis supports 225 , and the two second optical axis supports 225 are located at the front and rear ends of the frame. The two ends of the second optical axis 226 are respectively connected to the two second optical axis supports 225 , and the second optical axis 226 is arranged along the front and rear direction.

[0059] In this embodiment, a second optical axis 226 is provided, and during the movement of the second connecting member 224 in the front-back direction, the second optical axis 226 can guide the second connecting member 224. Since the third moving mechanism 23 is provided on the second connecting member 224, a load is mainly applied to the second connecting member 224 in the radial direction of the second optical axis 226, and the relative movement trend between the second connecting member 224 and the second slider in the radial direction of the second optical axis 226 is relatively large. The slot 2241 is opened in the axial direction of the second optical axis 226, and the second slider is provided in the slot 2241, that is, the second slider and the second connecting member 224 can only move in the axial direction of the second optical axis 226, and at the same time, the relative movement trend between the second connecting member 224 and the second slider in the axial direction of the second optical axis 226 is relatively small. Therefore, the second slider is not easy to separate from the second connecting member 224, which ensures the stability of the structure between the second slider and the second connecting member 224, thereby improving the stability of the structure of the second moving mechanism 22.

[0060] Alternatively, if Figure 1 As shown, the third moving mechanism 23 includes a third driving motor 231, a third screw rod 232, a third connecting member 233 and a guide rail 234. The guide rail 234 is arranged along the left-right direction, the microscopic observation mechanism 3 is arranged at one end of the guide rail 234, and the third driving motor 231 is arranged at the other end of the guide rail 234. The transmission shaft of the third driving motor 231 is arranged along the left-right direction, the end of the third screw rod 232 is connected to the transmission shaft of the third driving motor 231, the third connecting member 233 is connected to the second connecting member 224, and the third connecting member 233 is slidably connected to the third screw rod 232.

[0061] In this embodiment, the third drive motor 231 is started, and relative sliding occurs between the third screw rod 232 and the third connecting member 233, driving the guide rail 234 to move, thereby driving the microscopic observation mechanism 3 set at the right end of the guide rail 234 to move in the left and right direction. Since the specimen is set at the right end of the microscopic observation mechanism 3, when the microscopic observation mechanism 3 moves in the left and right direction, the distance between the microscopic observation mechanism 3 and the specimen can be adjusted, thereby achieving the adjustment of the field of view of the microscopic observation mechanism 3. At the same time, the microscopic observation mechanism 3 is set at the end of the guide rail 234, which can prevent the guide rail 234 from blocking the field of view of the microscopic observation mechanism 3. In addition, it can also prevent the right end of the guide rail 234 from being set close to the specimen for a long time, and prevent the guide rail 234 from interfering with other mechanisms on the experimental platform.

[0062] Preferably, if Figure 1 and Figure 4As shown, the third connecting member 233 includes a connecting plate 235 and a third slider 236. The connecting plate 235 is provided with a first connecting area 2351 and a second connecting area 2352. The connection between the connecting plate 235 and the second connecting member 224 is located in the first connecting area 2351, and the third slider 236 is located in the second connecting area 2352.

[0063] The third connecting member 233 further includes a third screw nut, which is disposed on the connecting plate 235 and is threadedly connected to the third screw 232. At the same time, a third connecting area 2353 is also disposed on the connecting plate 235, the first connecting area 2351 is located on both sides of the connecting plate 235, the second connecting area 2352 and the third connecting area 2353 are both located in the middle of the connecting plate 235, and the third screw nut is located in the third connecting area 2353.

[0064] In this embodiment, the first connection area 2351, the second connection area 2352 and the third connection area 2353 are arranged on the connection plate 235, the third slider 236 is arranged in the second connection area 2352, and the third screw nut is arranged in the third connection area 2353, and the connection between the third slider 236 and the connection plate 235 is arranged in the first connection area 2351. In this way, the third slider 236, the third screw nut and the connection plate 235 can be reasonably arranged, which is convenient for quickly assembling the third slider 236, the third screw nut, the connection plate 235 and the third connector 233.

[0065] Alternatively, if Figure 4-6 As shown, the microscopic observation device used for fatigue fracture experiment also includes a control box 4, and the control box 4 is communicatively connected with the first drive motor 211, the second drive motor 222 and the third drive motor 231.

[0066] Among them, the control box 4 is provided with a power supply 41, a single-chip computer 42, and a motor drive board 43, and the control box 4 is provided with an up button 441, a down button 442, a forward button 443, a backward button 444, a right button 445, a left button 446, a speed adjustment knob 45 and a power indicator light 46.

[0067] In this embodiment, the up button 441 and the down button 442 are both electrically connected to the first drive motor 211, and are used to control the first drive motor 211 to rotate forward or reverse to adjust the height of the microscopic observation mechanism 3; the forward button 443 and the backward button 444 are both electrically connected to the second drive motor 222, and are used to control the second drive motor 222 to rotate forward or reverse to adjust the position of the microscopic observation mechanism 3 along the front direction; the right button 445 and the left button 446 are both electrically connected to the third drive motor 231, and are used to control the third drive motor 231 to rotate forward or reverse to adjust the position of the microscopic observation mechanism 3 along the left and right directions; the speed adjustment knob 45 is electrically connected to the first drive motor 211, the second drive motor 222 and the third drive motor 231 at the same time, and is used to control the rotation speeds of the first drive motor 211, the second drive motor 222 and the third drive motor 231.

[0068] Preferably, the microscopic observation mechanism 3 further includes a fill light, which is arranged on the third moving mechanism 23 .

[0069] The fill light is arranged on the guide rail 234 .

[0070] In this embodiment, a fill light is arranged on the guide rail 234 to compensate for the lighting environment during the observation process of the microscopic observation mechanism 3 .

[0071] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A microscopic observation device used in fatigue fracture experiments, characterized in that: The invention comprises a clamp (1), a mobile platform and a microscopic observation mechanism (3), wherein the clamp (1) is used to be sleeved on a column, the mobile platform is arranged on the clamp (1), and an anti-slip filler is suitable for being arranged between the column and the clamp (1); the microscopic observation mechanism is arranged on the mobile platform and is used to observe cracks on a test piece; the mobile platform comprises a first mobile mechanism (21), a second mobile mechanism (22) and a third mobile mechanism (23), the first mobile mechanism (21) is arranged on the clamp (1), the first mobile mechanism (21) is arranged vertically, and the second mobile mechanism (22) is slidably connected to the first mobile mechanism (21) along a vertical direction. , the third moving mechanism (23) is slidably connected to the second moving mechanism (22) in the front-to-back direction, and the microscopic observation mechanism (3) is slidably connected to the third moving mechanism (23) in the left-to-right direction; the first moving mechanism (21) comprises a first drive motor (211), a first screw rod (212) and a first connecting member (213), the first drive motor (211) is arranged on the clamp (1), and the transmission shaft of the first drive motor (211) is vertically arranged, the end of the first screw rod (212) is connected to the transmission shaft of the first drive motor (211), and the first connecting member (213) is slidably connected to the first screw rod (212); The second moving mechanism (22) comprises a bracket (221), a second drive motor (222), a second screw rod (223) and a second connecting member (224); the bracket (221) is arranged on the first connecting member (213); the second drive motor (222) is arranged on the bracket (221); the transmission shaft of the second drive motor (222) is arranged along the front-rear direction; the end of the second screw rod (223) is connected to the transmission shaft of the second drive motor (222); and the second connecting member (224) is slidably connected to the second screw rod (223); and the third moving mechanism (23) is arranged on the second connecting member (224).

2. The microscopic observation device for fatigue fracture experiment according to claim 1, characterized in that: Two clamps (1) are provided, and the two clamps (1) are respectively connected to the upper and lower ends of the first moving mechanism (21).

3. The microscopic observation device for fatigue fracture experiment according to claim 1, characterized in that: The clamp (1) comprises two collars (11) and a bolt, the opening sides of the two collars (11) are arranged opposite to each other, and the bolt is arranged at the connection between the two collars (11).

4. The microscopic observation device for fatigue fracture experiment according to claim 1, characterized in that: The first moving mechanism (21) further comprises a first optical axis support (214), a first optical axis (215) and a first sliding block, wherein the first optical axis support (214) is arranged on the clamp (1), the first sliding block is slidably connected to the first optical axis (215), the first connecting member (213) comprises a first connecting block (2131) and a second connecting block (2132), the first connecting block (2131) is slidably connected to the first screw rod (212), the first connecting block (2131) and the second connecting block (2132) are connected and are used to clamp the first sliding block.

5. The microscopic observation device for fatigue fracture experiment according to claim 1, characterized in that: The second moving mechanism (22) further comprises a second optical axis support (225), a second optical axis (226) and a second slider, wherein the second optical axis support (225) is arranged on the bracket (221), the second optical axis (226) is arranged on the second optical axis support (225), the second slider is slidably connected to the second optical axis (226), a slot (2241) is provided on the second connecting member (224), and the second slider is arranged in the slot (2241).

6. The microscopic observation device for fatigue fracture experiment according to claim 1, characterized in that: The third moving mechanism (23) comprises a third driving motor (231), a third screw rod (232), a third connecting member (233) and a guide rail (234); the guide rail (234) is arranged in the left-right direction; the microscopic observation mechanism (3) is arranged at one end of the guide rail (234); and the third driving motor (231) is arranged at the other end of the guide rail (234); the transmission shaft of the third driving motor (231) is arranged in the left-right direction; the end of the third screw rod (232) is connected to the transmission shaft of the third driving motor (231); the third connecting member (233) is connected to the second connecting member (224); and the third connecting member (233) is slidably connected to the third screw rod (232).

7. The microscopic observation device for fatigue fracture experiment according to claim 6, characterized in that: It also includes a control box (4), wherein the control box (4) is communicatively connected to the first drive motor (211), the second drive motor (222), and the third drive motor (231).

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