CN213933392U - In-situ stretching device for optical in-situ stretching observation system of wood thin slice - Google Patents

In-situ stretching device for optical in-situ stretching observation system of wood thin slice Download PDF

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Publication number
CN213933392U
CN213933392U CN202023010515.XU CN202023010515U CN213933392U CN 213933392 U CN213933392 U CN 213933392U CN 202023010515 U CN202023010515 U CN 202023010515U CN 213933392 U CN213933392 U CN 213933392U
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fine
fine adjustment
stretching
tuning
hole
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林兰英
王东
傅峰
龙克莹
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Research Institute of Wood Industry of Chinese Academy of Forestry
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Research Institute of Wood Industry of Chinese Academy of Forestry
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Abstract

The utility model discloses an in situ stretching device for tensile observation system of thin section of timber optics in situ, include: the stretching table comprises a sliding guide rail and a fine adjustment installation part, and the sliding guide rail and the fine adjustment installation part are respectively arranged at two ends of the stretching table; the fine adjustment assembly is arranged on the fine adjustment mounting part and comprises a direction fine adjustment disc which can rotate by taking the central axis thereof as a shaft; the driving moving carrying assembly is arranged on the sliding guide rail and can reciprocate along the sliding guide rail, one end, close to the fine adjustment assembly, of the driving moving carrying assembly comprises a first clamp and a second clamp, the first clamp is fixedly connected with the driving moving carrying assembly and can reciprocate along with the driving moving carrying assembly, and the second clamp is fixedly connected with the direction fine adjustment disc and can rotate along with the direction fine adjustment disc; the overlooking central lines of the driving moving object carrying assembly and the stretching platform are superposed and vertically intersected with the central axis of the direction fine adjustment disc. The crack initiation and crack propagation rules of the wood sheet material in the stretching process can be recorded in real time.

Description

In-situ stretching device for optical in-situ stretching observation system of wood thin slice
Technical Field
The utility model relates to a timber normal position mechanical properties test field especially relates to an normal position stretching device that is used for tensile observation system of timber thin section optics normal position.
Background
Monitoring of crack initiation and expansion rules in the process of wood fracture is always a focus of attention in the field of research of mechanical properties of wood, and currently, two methods, namely monitoring by an electron microscope and a loading device in a combined in-situ observation method and a digital speckle dry method, are mainly used. The in-situ observation method for the combination of the electron microscope and the loading device is characterized in that an in-situ mechanical test accessory is added on the basis of the electron microscope, and the in-situ mechanical test accessory can simultaneously realize the observation of the damage process and the mechanical property test under the action of wood load.
Because the wood is a biomass material and has poor conductivity, when the electron microscope and the loading device are combined to be monitored by an in-situ observation method, the surface of the sample needs to be sprayed with gold; secondly, due to the small field of view of the electron microscope, the sample is usually prefabricated with certain cracks, and the process of crack propagation is mainly studied. An in-situ stretching device for an optical in-situ stretching observation system of a wood thin slice is developed and arranged below an optical microscope, and the imaging system of the optical microscope can be used for monitoring the crack initiation and crack propagation process of a sample in the damage process in real time.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an in situ stretching device for tensile observation system of timber thin section optics normal position, it can arrange in and observe under the optical microscope, with the help of the crackle emergence position and the crack propagation law of the tensile in-process of optical microscope imaging system real-time recording timber thin slice material, and then the ligneous mechanism of rupture of analysis.
In order to achieve the above object, the utility model provides an in-situ stretching device for an optical in-situ stretching observation system of a wood thin slice, which comprises a stretching table, a fine adjustment assembly and a driving moving object carrying assembly; the stretching table comprises a sliding guide rail and a fine adjustment installation part, and the sliding guide rail and the fine adjustment installation part are respectively arranged at two ends of the stretching table; the fine adjustment assembly is arranged on the fine adjustment mounting part and comprises a direction fine adjustment disc which can rotate by taking the central axis thereof as a shaft; the driving moving carrying assembly is arranged on the sliding guide rail and can reciprocate along the sliding guide rail, one end, close to the fine adjustment assembly, of the driving moving carrying assembly comprises a first clamp and a second clamp, the first clamp is fixedly connected with the driving moving carrying assembly and can reciprocate along with the driving moving carrying assembly, and the second clamp is fixedly connected with the direction fine adjustment disc and can rotate along with the direction fine adjustment disc; wherein the overlooking central lines of the driving moving object carrying assembly and the stretching platform are superposed and vertically intersected with the central axis of the direction fine adjustment disc.
In a preferred embodiment, the fine adjustment assembly further comprises a fine adjustment table fixed on the fine adjustment installation part through a bolt, and the fine adjustment table comprises a fine adjustment round hole, a fine adjustment square hole and a fine adjustment groove; the fine tuning round hole is arranged at one end of the fine tuning platform; the fine adjustment square hole is arranged at the other end of the fine adjustment table; the fine tuning groove is connected between the fine tuning round hole and the fine tuning square hole; the depth of the fine tuning groove is smaller than the depths of the fine tuning round hole and the fine tuning square hole, the overlooking longitudinal center line of the fine tuning square hole is overlapped with the overlooking longitudinal center line of the fine tuning square hole, and the central axis of the fine tuning round hole is vertically intersected with the overlooking longitudinal center line of the fine tuning table.
In a preferred embodiment, the fine adjustment assembly further comprises a fine adjustment copper ring, a fine adjustment handle, a fixing structure, a precise thread pair and a limiting structure; the fine tuning copper ring is arranged in the fine tuning circular hole, and the direction fine tuning disc and the fine tuning copper ring are coaxially arranged on the fine tuning copper ring; one end of the fine adjustment handle is arranged on the fine adjustment copper ring, the other end of the fine adjustment handle penetrates through the fine adjustment groove and then extends into the fine adjustment square hole, and the fine adjustment copper ring, the direction fine adjustment disc and the second clamp can be driven to rotate together by stirring the other end of the fine adjustment handle by taking the central axis of the fine adjustment round hole as a shaft; the fixing structure is arranged at one end of the fine adjustment square hole, the tightening bolt is arranged in the threaded hole at one end of the fine adjustment square hole, the central axis of the tightening bolt is coaxial with the central line of the fine adjustment handle, and the tightening bolt can abut against the other end of the fine adjustment handle along the central line direction of the fine adjustment handle to fix the fine adjustment handle; the precise thread pair is arranged on one side wall of the fine-tuning square hole, and the central axis of the precise thread pair is vertically intersected with the central axis of the fine-tuning handle; the limiting structure is arranged on the other side wall of the fine adjustment square hole, the central axis of the limiting structure is vertically intersected with the central line of the fine adjustment handle, one end of the limiting structure is provided with a spring, and the spring abuts against the other side of the other end of the fine adjustment handle; wherein the adjusting precise thread pair can be abutted against one side of the other end of the fine adjustment handle to enable the fine adjustment handle to slightly deflect against the tension of the spring.
In a preferred embodiment, the stretching stage further includes a bearing mounting hole provided at one end of the slide rail of the stretching stage, and a center line of the bearing mounting hole coincides with a top-view center line of the driving moving object assembly and the stretching stage and perpendicularly intersects with a central axis of the steering fine adjustment dial.
In a preferred embodiment, the driving moving object carrying assembly further comprises a moving table, a driving screw rod, a rolling bearing and a stepping motor; the two sides of the mobile platform are provided with sliding blocks which are arranged in the sliding guide rail, one end of the mobile platform comprises a central screw hole, and the central axis of the central screw hole is superposed with the overlooking central line of the driving mobile object carrying assembly and the stretching platform; one end of the driving screw is arranged in the central screw hole; the rolling bearing is arranged in the bearing mounting hole, and the other end of the driving screw rod penetrates through the rolling bearing and extends out of the bearing mounting hole; the stepping motor is connected with the other end of the driving screw rod; wherein the stepping motor drives the driving screw rod to rotate and drives the moving platform to move along the sliding guide rail.
In a preferred embodiment, the driving moving object assembly further comprises a stress sensor fixedly connected with the other end of the moving table, and the first clamp is fixedly connected with the stress sensor.
In a preferred embodiment, the stretching station further comprises a slide guide arranged along the slide guide.
In a preferred embodiment, the slider has a guide rod sliding hole, the sliding guide rod is inserted into the guide rod sliding hole, and the guide rod sliding hole slides along the sliding guide rod while the slider moves along the sliding guide rail.
In a preferred embodiment, the first clamp and the second clamp are both provided with clamping structures for clamping the tensile sample.
In a preferred embodiment, the fine adjustment handle is provided with a handle connecting part, the fine adjustment copper ring is provided with a handle mounting part, the handle connecting part and the handle mounting part are both provided with bolt holes matched in position, the direction fine adjustment disc is provided with threaded holes matched with the bolt holes in position, and the threaded holes are screwed through the bolt holes by using fixing bolts to fix the handle connecting part on the handle mounting part.
Compared with the prior art, the utility model discloses an in situ stretching device for tensile observation system of timber thin section optics in situ has following beneficial effect: this scheme can carry out ascending fine setting to tensile sample through the fine setting subassembly, and the fibre texture that can make tensile sample through microscopical supplementary can be as far as possible unanimous with the direction of tensile force, can reflect tensile actual effect better like this. The device has small volume while realizing in-situ stretching of the wood sample to be tested, can be observed under an optical microscope, and is further favorable for analyzing crack initiation and expansion rules of the wood sample in the stretching process in real time, thereby researching the fracture mechanism of the wood.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of an in-situ stretching apparatus according to an embodiment of the present invention;
fig. 2 is a schematic three-dimensional structure diagram of a stretching station according to an embodiment of the present invention;
fig. 3 is a schematic three-dimensional structure of a fine adjustment assembly according to an embodiment of the present invention;
fig. 4 is a schematic three-dimensional structure of a driven moving carrier assembly according to an embodiment of the present invention;
fig. 5 is a schematic three-dimensional structure of a tensile sample according to an embodiment of the present invention;
fig. 6 is a schematic size diagram of a tensile sample according to an embodiment of the present invention.
Description of the main reference numerals:
10-in-situ stretching device, 101-stretching table, 1011-bearing mounting hole, 1012-sliding guide rod, 1013-sliding guide rail, 1014-fine-tuning mounting part, 102-fine-tuning assembly, 1021-fine-tuning table, 10211-fine-tuning round hole, 10212-fine-tuning groove, 10213-fine-tuning square hole, 1022-fine-tuning copper ring, 1023-direction fine-tuning disc, 1024-fine-tuning handle, 10241-handle connecting part, 10242-abutting adjusting part, 1025-fixing bolt, 1026-precision thread pair, 1027-fixing structure, 1028-spring, 1029-limiting structure, 103-driving moving object carrying assembly, 1031-stepping motor, 1032-rolling bearing, 1033-driving screw rod, 1034-moving table, 10341-sliding block and 1035-stress sensor, 10361-first clamp, 10362-second clamp, 1037-clamping structure, 1038-guide slide, 20-objective, 30-stage, 40-tensile specimen.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1 to 5, an in-situ stretching apparatus 10 for an optical in-situ stretching observation system of a wood thin slice according to a preferred embodiment of the present invention mainly includes a stretching stage 101, a fine adjustment assembly 102, a driving moving object assembly 103, and the like.
Referring to fig. 1 and 2, in some embodiments, the drawing bench 101 mainly includes a bearing mounting hole 1011, a sliding guide 1012, a sliding guide 1013, and a fine adjustment mounting 1014. The stretching table 101 is shaped like a dustpan, and the bottom plate at the opening extends forward a certain distance. Slide rail 1013 and fine adjustment mounting part 1014 are provided at both ends of stretching table 101. The slide rail 1013 is provided inside the vertical sides on both sides of the dustpan structure, and the slide rail 1013 of this embodiment is of a dovetail type. The slide guide 1012 is disposed along the slide rail 1013. The bearing mounting hole 1011 is provided at one end of the slide rail 1013 of the stretching table 101, and a center line of the bearing mounting hole 1011 coincides with a top-view center line of the driving moving carrier assembly 103 and the stretching table 101 and intersects perpendicularly with a central axis line of the steering wheel. Tooling holes or lightening holes (not shown) are also provided in the slide rail 1013 and the fine adjustment mounting part 1014. The drawing table 101 of the present embodiment can be manufactured by metal casting, welding, or the like.
Referring to fig. 1 and 3, in some embodiments, the fine adjustment assembly 102 is bolted to the fine adjustment mount 1014. The fine adjustment assembly 102 mainly includes a fine adjustment platform 1021, a fine adjustment copper ring 1022, a direction fine adjustment disc 1023, a fine adjustment handle 1024, a fixing bolt 1025, a precision thread pair 1026, a fixing structure 1027, a spring 1028, a limit structure 1029, and the like. One end of the fine adjustment handle 1024 is provided with a handle connecting part 10241, and the other end is provided with a butting adjustment part 10242.
In some embodiments, the fine tuning stage 1021 is fixed to the fine tuning mounting part 1014 by bolts, the fine tuning stage 1021 is approximately a rectangular parallelepiped structure, and the fine tuning stage 1021 mainly includes a fine tuning round hole 10211, a fine tuning square hole 10213, and a fine tuning groove 10212. A fine tuning circular hole 10211 is provided at one end of the fine tuning stage 1021. A fine-tuning square hole 10213 is provided at the other end of the fine-tuning stage 1021. Fine adjustment recesses 10212 are connected between fine adjustment round holes 10211 and fine adjustment square holes 10213. The depth of the fine adjustment groove 10212 is smaller than the depths of the fine adjustment round hole 10211 and the fine adjustment square hole 10213, the overlook longitudinal center line of the fine adjustment table 1021 is coincident with the overlook longitudinal center line of the fine adjustment square hole 10213, and the central axis of the fine adjustment round hole 10211 is vertically intersected with the overlook longitudinal center line of the fine adjustment table 1021.
In some embodiments, the fine direction dial 1023 is a stacked structure of two coaxial disks, the diameter of the lower disk being smaller than the diameter of the upper disk. The fine tuning copper ring 1022 is disposed in the fine tuning circular hole 10211, and the outer diameter of the fine tuning copper ring 1022 and the inner diameter of the fine tuning circular hole 10211 are relatively precisely matched, and lubricating oil or grease can be filled between the fine tuning copper ring 1022 and the fine tuning circular hole 10211 to facilitate rotation of the fine tuning copper ring 1022 in the fine tuning circular hole 10211. The lower disc of the direction fine tuning disc 1023 is inserted into the inner hole of the fine tuning copper ring 1022. Fine setting handle 1024 is last to be provided with handle connecting portion 10241, is provided with the handle installation department on the fine setting copper ring 1022, and it is the sunken of a department and the handle installation department 10241 shape matching on the outer circumference of fine setting copper ring 1022, all is provided with the bolt hole (not pictured) of position matching on handle connecting portion 10241 and the handle installation department, is provided with the screw hole (not pictured) that matches with the bolt hole position on the direction fine setting dish 1023, through passing bolt hole spiro union screw hole with fixing bolt 1025 to set firmly handle connecting portion 10241 on the handle installation department. After the handle connecting portion 10241 is connected to the handle mounting portion, the outer diameter of the handle connecting portion 10241 is not larger than the outer diameter of the fine tuning copper ring 1022, that is, the handle connecting portion 10241 does not interfere with the fine tuning copper ring 1022 disposed in the fine tuning circular hole 10211. The center line of the fine adjustment handle 1024 is perpendicular to the central axis of the fine adjustment round hole 10211, the fine adjustment copper ring 1022 and the direction fine adjustment disc 1023.
In some embodiments, the second fixture 10362 is fixedly connected to the upper plate of the direction tuning plate 1023, and the connection manner may be bolt connection, clamping, welding, or direct integral casting, which is not limited in the present invention. Only after connection, it is ensured that the top-view center line of the second clamp 10362 and the top-view center line of the fine adjustment handle 1024 coincide, which is more favorable for stretching stress.
In some embodiments, the fixing structure 1027 is disposed at one end of the fine-tuning square hole 10213, the fixing structure 1027 is substantially a tightening bolt disposed in a threaded hole at one end of the fine-tuning square hole 10213, a central axis of the tightening bolt is coaxial with a central line of the fine-tuning handle 1024, and the tightening bolt can abut against the abutting adjustment portion 10242 at the other end of the fine-tuning handle 1024 along the central line direction of the fine-tuning handle 1024 to fix the fine-tuning handle 1024. A precision screw pair 1026 is provided on a side wall of one side of the fine adjustment square hole 10213, and a central axis of the precision screw pair 1026 perpendicularly intersects with a central axis of the fine adjustment handle 1024. The limiting structure 1029 is arranged on the side wall of the other side of the fine adjustment square hole 10213, the central axis of the limiting structure 1029 is vertically intersected with the central line of the fine adjustment handle 1024, one end of the limiting structure 1029 is provided with a spring 1028, and the spring 1028 abuts against the other side of the abutting adjustment part 10242 at the other end of the fine adjustment handle 1024.
In some embodiments, one end of the fine adjustment handle 1024 is disposed on the fine adjustment copper ring 1022 through the handle connector 10241, and the abutting adjustment portion 10242 of the other end extends into the fine adjustment square hole 10213 after passing through the fine adjustment groove 10212. Wherein, the adjusting precision screw pair 1026 can abut against one side of the abutting adjusting portion 10242 at the other end of the fine adjustment handle 1024 to enable the fine adjustment handle 1024 to slightly deflect against the tension of the spring 1028, and meanwhile, the fine adjustment handle 1024 can drive the fine adjustment copper ring 1022, the direction fine adjustment disc 1023 and the second clamp 10362 to slightly rotate together by taking the central axis of the fine adjustment round hole 10211 as an axis, so that the direction of the tensile sample can be finely adjusted.
Referring to fig. 1 and 4, in some embodiments, the driving moving carrier assembly 103 mainly includes a stepping motor 1031, a rolling bearing 1032, a driving screw 1033, a moving table 1034, a stress sensor 1035, a first clamp 10361, a second clamp 10362, a clamping structure 1037, and the like. The movable table 1034 has sliders 10341 on both sides, and the sliders 10341 are disposed in the slide rail 1013. The slider 10341 has a guide bar sliding hole 1038, the sliding guide bar 1012 passes through the guide bar sliding hole 1038, and the guide bar sliding hole 1038 slides along the sliding guide bar 1012 while the slider 10341 moves along the sliding guide rail 1013. One end of the movable stage 1034 includes a central screw hole (not shown) whose central axis coincides with the top central line of the movable carrier assembly 103 and the stretching stage 101. One end of the drive screw 1033 is disposed within the central threaded bore. The rolling bearing 1032 is disposed in the bearing mounting hole 1011, and the other end of the drive screw 1033 passes through the rolling bearing 1032 and extends out of the bearing mounting hole 1011. The stepping motor 1031 is connected to the other end of the drive screw 1033. The stress sensor 1035 is fixedly connected to the other end of the mobile station 1034, and the first clamp 10361 is fixedly connected to the stress sensor 1035. The stepping motor 1031 drives the driving screw 1033 to rotate, and simultaneously drives the moving table 1034 to move along the sliding guide 1013 and drives the first clamp 10361 to move along the top center line of the driving moving object-carrying assembly 103.
Referring to fig. 1, 5 and 6, in some embodiments, a clamping structure 1037 is disposed on each of the first clamp 10361 and the second clamp 10362, and the clamping structure 1037 is used for clamping the tensile sample 40. The tensile sample 40 of the present embodiment is similar to a "dog bone" structure, but the present invention is not limited thereto.
In some embodiments, the use method of the in-situ stretching device for the optical in-situ stretching observation system for the wood thin section of the present invention is as follows:
first, the in-situ drawing apparatus 10 is placed on the stage 30 of the optical microscope, and the objective lens 20 of the optical microscope is placed above between the first and second holders 10361 and 10362.
Then, the tensile sample 40 was attached to the first jig 10361 and the second jig 10362, the objective lens 20 of the optical microscope was adjusted to 4-fold, and the fiber direction of the neck portion of the tensile sample 40 was observed.
The fine screw pair 1026 is adjusted repeatedly to make the fine screw pair 1026 abut against or loosen one side of the tail end of the fine adjustment handle 1024, so that one side of the tail end of the fine adjustment handle 1024 slightly deflects to two sides against the tension of the spring 1028 of the limiting structure 1029 or depending on the tension of the spring 1028, and meanwhile, whether the fiber at the neck of the tensile sample 40 is parallel to the horizontal line (tensile stress direction) on the optical microscope or not is observed in the objective lens 20 until the fiber is adjusted to be parallel to the horizontal line as much as possible, and then the fixing structure 1027 is locked to make the fine adjustment handle 1024 in a stable state.
The locking clamping structure 1037 compresses two ends of the tensile sample 40, and the tensile force is preloaded to the tensile sample 40 by driving the stepping motor 1031, wherein the preloading force is less than 1N;
opening the fixing device in the fine adjustment assembly 102 again, slightly rotating the direction fine adjustment disc in the fine adjustment assembly 102 by adjusting the fine adjustment handle 1024 of the fine adjustment screw pair 1026, adjusting the first clamp 10361, the second clamp 10362 and the direction of the tensile sample 40, further enabling the fiber direction of the neck straight line section of the tensile sample 40 to be parallel to the horizontal line (tensile stress direction) of the ocular lens, and locking the fixing device;
adjusting the size of an objective lens 20 of the optical microscope and the position of a workbench 30 surface of the optical microscope, selecting and focusing an interested area of the tensile sample 40, turning on an imaging system of the optical microscope, and setting video resolution and frequency;
and meanwhile, the step motor 1031 driving the movable carrying component 103 is opened to continuously load the stretching force and the imaging system, detect the wood damage process and record and take pictures at any time.
And (4) supplementary notes: the stretching speed of the in-situ stretching can be adjusted within the range of 0.030mm/min to 1mm/min, the maximum load capacity is 500N, and the maximum measuring range is 10 mm. The thickness range of the tensile sample is less than 60 μm, and the thickness is determined according to the wood cell diameter and the light transmission requirement of an optical microscope. The width of the neck straight line segment is less than 5mm, and the width can be determined according to the annual ring width of wood and the like. The tensile specimen may be stained with crocus and other biological dyes to improve the identification of wood tissue.
In some embodiments, one example of which is a result of imaging (not shown), it can be seen that when the tensile specimen 40 is longitudinally stretched, the initial failure site/crack is initiated within the ray structure, the crack propagates longitudinally along the early and late wood boundaries, and the whole wood fracture is jagged.
To sum up, the utility model discloses an in situ stretching device for tensile observation system of thin section of timber optics in situ has following advantage: this scheme can carry out ascending fine setting to tensile sample through the fine setting subassembly, and the fibre texture that can make tensile sample through microscopical supplementary can be as far as possible unanimous with the direction of tensile force, can reflect tensile actual effect better like this. The device has small volume while realizing in-situ stretching of the wood sample to be tested, can be observed under an optical microscope, and is further favorable for analyzing crack initiation and expansion rules of the wood sample in the stretching process in real time, thereby researching the fracture mechanism of the wood.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (10)

1. An in-situ stretching device for an optical in-situ stretching observation system of a wood thin slice, which is characterized by comprising:
the stretching table comprises a sliding guide rail and a fine adjustment installation part, and the sliding guide rail and the fine adjustment installation part are respectively arranged at two ends of the stretching table;
the fine adjustment assembly is arranged on the fine adjustment mounting part and comprises a direction fine adjustment disc which can rotate by taking the central axis thereof as an axis; and
the driving moving carrying assembly is arranged on the sliding guide rail and can reciprocate along the sliding guide rail, one end, close to the fine adjustment assembly, of the driving moving carrying assembly comprises a first clamp and a second clamp, the first clamp is fixedly connected with the driving moving carrying assembly and can reciprocate along with the driving moving carrying assembly, and the second clamp is fixedly connected with the direction fine adjustment disc and can rotate along with the direction fine adjustment disc;
wherein the top view central line of the driving moving object carrying assembly and the stretching platform are superposed and vertically intersected with the central axis of the direction fine adjustment disc.
2. The in-situ tension apparatus for an optical in-situ tension observing system of wood thin slices as claimed in claim 1, wherein the fine tuning assembly further comprises a fine tuning stage fixed on the fine tuning installation part by bolts, the fine tuning stage comprising:
the fine adjustment round hole is arranged at one end of the fine adjustment table;
a fine-tuning square hole arranged at the other end of the fine-tuning table; and
the fine tuning groove is connected between the fine tuning round hole and the fine tuning square hole;
the depth of the fine adjustment groove is smaller than the depth of the fine adjustment round hole and the depth of the fine adjustment square hole, the overlook longitudinal center line of the fine adjustment square hole is overlapped with the overlook longitudinal center line of the fine adjustment square hole, and the central axis of the fine adjustment round hole is vertically intersected with the overlook longitudinal center line of the fine adjustment square hole.
3. The in-situ stretching apparatus for an optical in-situ stretching observation system of wood thin slices as claimed in claim 2, wherein the fine-tuning assembly further comprises:
a fine tuning copper ring arranged in the fine tuning circular hole, wherein the direction fine tuning disc and the fine tuning copper ring are coaxially arranged on the fine tuning copper ring;
one end of the fine adjustment handle is arranged on the fine adjustment copper ring, the other end of the fine adjustment handle penetrates through the fine adjustment groove and then extends into the fine adjustment square hole, and the fine adjustment handle is stirred to drive the fine adjustment copper ring, the direction fine adjustment disc and the second clamp to rotate together by taking the central axis of the fine adjustment round hole as a shaft;
the fixing structure is arranged at one end of the fine-adjustment square hole, the fixing structure is arranged on a tightening bolt in a threaded hole at one end of the fine-adjustment square hole, the central axis of the tightening bolt is coaxial with the central line of the fine-adjustment handle, and the tightening bolt can abut against the other end of the fine-adjustment handle along the central line direction of the fine-adjustment handle to fix the fine-adjustment handle;
the precise thread pair is arranged on one side wall of the fine-tuning square hole, and the central axis of the precise thread pair is vertically intersected with the central line of the fine-tuning handle; and
the limiting structure is arranged on the other side wall of the fine adjustment square hole, the central axis of the limiting structure is vertically intersected with the central line of the fine adjustment handle, one end of the limiting structure is provided with a spring, and the spring abuts against the other side of the other end of the fine adjustment handle;
the adjusting precise thread pair can abut against one side of the other end of the fine adjustment handle, so that the fine adjustment handle is slightly deflected against the tension of the spring.
4. The in-situ stretching apparatus for an optical in-situ stretching observation system of wood thin slices as claimed in claim 1, wherein the stretching stage further comprises a bearing installation hole disposed at one end of the sliding guide of the stretching stage, and a center line of the bearing installation hole coincides with a top-view center line of the driving moving object assembly and the stretching stage and perpendicularly intersects with a central axis of the direction fine tuning disk.
5. The in-situ stretching apparatus for an optical in-situ stretching observation system of wood thin slices as claimed in claim 4, wherein the driving moving carrier assembly further comprises:
the two sides of the moving platform are provided with sliding blocks, the sliding blocks are arranged in the sliding guide rails, one end of the moving platform comprises a central screw hole, and the central axis of the central screw hole is superposed with the overlooking central line of the driving moving object carrying assembly and the stretching platform;
a drive screw having one end disposed within the central screw bore;
the rolling bearing is arranged in the bearing mounting hole, and the other end of the driving screw rod penetrates through the rolling bearing and extends out of the bearing mounting hole; and
the stepping motor is connected with the other end of the driving screw rod;
the stepping motor drives the driving screw to rotate and drives the moving platform to move along the sliding guide rail.
6. The in-situ tension apparatus for optical in-situ tension observing system of wood thin slice according to claim 5, wherein the driving moving object assembly further comprises a stress sensor fixedly connected with the other end of the moving stage, and the first clamp is fixedly connected with the stress sensor.
7. The in-situ stretching apparatus for an optical in-situ stretching observation system of wood thin slices as claimed in claim 5, wherein the stretching stage further comprises a slide guide disposed along the slide guide.
8. The in-situ stretching device for the optical in-situ stretching observation system of the wood thin slice as claimed in claim 7, wherein the sliding block is provided with a guide rod sliding hole, the sliding guide rod is inserted into the guide rod sliding hole, and the guide rod sliding hole slides along the sliding guide rod while the sliding block moves along the sliding guide rail.
9. The in-situ stretching device for the optical in-situ stretching observation system of the wood thin slice as claimed in claim 1, wherein the first clamp and the second clamp are both provided with clamping structures for clamping the stretching sample.
10. The in-situ stretching device for the optical in-situ stretching observation system of the wood thin section as claimed in claim 3, wherein the fine-tuning handle is provided with a handle connecting portion, the fine-tuning copper ring is provided with a handle mounting portion, the handle connecting portion and the handle mounting portion are both provided with bolt holes matching in position, the direction fine-tuning disc is provided with a threaded hole matching in position with the bolt hole, and the threaded hole is screwed and locked by penetrating the bolt hole through a fixing bolt so as to fix the handle connecting portion on the handle mounting portion.
CN202023010515.XU 2020-12-15 2020-12-15 In-situ stretching device for optical in-situ stretching observation system of wood thin slice Active CN213933392U (en)

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