CN111627301A - Material mechanics deformation stress presentation device that possesses real-time image transmission - Google Patents
Material mechanics deformation stress presentation device that possesses real-time image transmission Download PDFInfo
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- CN111627301A CN111627301A CN202010625850.6A CN202010625850A CN111627301A CN 111627301 A CN111627301 A CN 111627301A CN 202010625850 A CN202010625850 A CN 202010625850A CN 111627301 A CN111627301 A CN 111627301A
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Abstract
The invention discloses a material mechanics deformation stress demonstration device with real-time image transmission, relates to the technical field of material test demonstration equipment, and solves the problems that the existing demonstration device is single in demonstration capability and single in function, and can not well give consideration to demonstration of four-side extrusion deformation stress and demonstration of center jacking deformation stress. A material mechanics deformation stress demonstration device with real-time image transmission comprises a synchronous frame and a connecting frame, wherein the whole demonstration box is of a square structure, the top end of the demonstration box is tightly covered with a transparent cover plate, two cross brace positioning shafts are symmetrically supported on the bottom sections of the front inner wall and the rear inner wall of the demonstration box, and the two support frames are sleeved on the two cross brace positioning shafts; the demonstration box is welded and fixed between the top end sections of the two supporting leg frames. When the clamping plates are converged to slide to extrude the material, the two supporting frames can be pushed to slide, so that the blocking obstacles on the front clamping plate and the rear clamping plate are avoided, and the normal implementation of mechanical deformation demonstration is ensured.
Description
Technical Field
The invention relates to the technical field of material test demonstration equipment, in particular to a material mechanics deformation stress demonstration device with real-time image transmission.
Background
The material mechanics is an important subject basic course for various specialties of machinery and civil engineering, and is also a relatively abstract course, especially contents of four basic deformation stress parts of stretching or compressing, shearing, twisting and bending, and the material mechanics is difficult to be really understood without adopting a relatively visual description and explanation method. For example, a simple shear deformation of a rod, the deformation characteristics of which may be relatively easy to understand by students, but they feel somewhat inattentive to actually understand the shear stress distribution across the rod. Therefore, the teaching aid for demonstrating basic theoretical knowledge of mechanics by adopting a simple and visual teaching aid is undoubtedly a good teaching means, is vivid and lively, and can improve the learning interest and participation enthusiasm of students. Aiming at the learning needs of students in the process of learning four large deformation stresses through material mechanics, a relevant demonstration teaching aid is developed, a teacher or a student can demonstrate and observe four large basic deformations of a rod piece and stress distribution conditions thereof by hands, participation enthusiasm and learning interest of the students in the course learning process are improved, and the device for demonstrating the material mechanics deformation stresses through real-time image transmission is needed.
For example, patent number CN201710123858.0 discloses a material mechanics deformation stress demonstration teaching aid, belongs to the teaching aid field. The material mechanics deformation stress demonstration teaching aid comprises a teaching aid rod piece, wherein the teaching aid rod piece comprises a first rod piece, a second rod piece and a third rod piece, a shielding disc is fixed on the third rod piece, a first spring fixing piece is fixed on the second rod piece, a circular groove is formed in the first spring fixing piece, a bearing is fixed in the circular groove, a first shaft is fixed on the bearing, a second spring fixing piece is fixed on the third rod piece, a through hole is formed in the second spring fixing piece, the first rod piece is provided with a second shaft, and an adjusting spring is sleeved on the first shaft and the second shaft; a torsion dial is fixed at one end of the second shaft, which penetrates out of the second spring fixing piece; a bending stress demonstration assembly capable of demonstrating bending stress is further arranged between the first rod piece and the second rod piece; and the other end of the second rod piece is provided with a shear stress demonstration assembly capable of demonstrating shear stress. The invention has the advantage of intuitively displaying the basic deformation characteristics of stretching or compressing, shearing, twisting and bending.
The existing demonstration device can only perform center jacking deformation stress demonstration on a test material, the test demonstration capacity is single, the function is single, four-side extrusion deformation stress demonstration and center jacking deformation stress demonstration cannot be well achieved, the two demonstration use states are more in interference structure, and the switching operation of the two use states is complicated and inconvenient.
Disclosure of Invention
The invention aims to provide a material mechanics deformation stress demonstration device with real-time image transmission, and aims to solve the problems that the test demonstration capability provided by the background technology is single, the function is one-sided, and the demonstration of four-side extrusion deformation stress and the demonstration of center top pressure deformation stress cannot be well considered.
In order to achieve the purpose, the invention provides the following technical scheme: a material mechanics deformation stress demonstration device with real-time image transmission comprises a demonstration box, a synchronous frame and a connecting frame, wherein the demonstration box comprises cross-brace positioning shafts and supporting frames, the whole demonstration box is of a square structure, the top end of the demonstration box is tightly covered with a transparent cover plate, two cross-brace positioning shafts are symmetrically supported on the bottom sections of the front inner wall and the rear inner wall of the demonstration box, and the two supporting frames are sleeved on the two cross-brace positioning shafts; the demonstration box is welded and fixed between the top end sections of the two supporting leg frames, and the vertical support is locked at the middle position of the supporting and connecting plate at the bottom of the two supporting leg frames and is provided with an electric cylinder; the electric cylinder comprises a positioning frame, an inserting frame and a tension sensor, wherein the positioning frame is fixedly arranged at the topmost end of a telescopic rod of the electric cylinder in a locking and sleeving manner, the bottom rod section of the position of the positioning frame is connected with the tension sensor in a screwing manner, and the inserting frame is inserted on the middle section of the positioning frame in a sliding and penetrating manner through a spring in a pushing manner; the connecting frame is arranged at the top end of the positioning frame in a sliding manner, and the supporting connecting plate at the bottom of the inserting frame is sleeved on the rod section at the lower side of the tension sensor in a sliding manner; four long-strip clamping plates symmetrically penetrate through and are inserted into the peripheral side walls of the demonstration box; four cameras are symmetrically and tightly locked and installed on the middle sections of the left inner wall and the right inner wall of the demonstration box and are respectively arranged on two sides of the left clamping plate and the right clamping plate; the synchronous frame comprises connecting shafts, two synchronous frames are symmetrically inserted into the bottom plate of the demonstration box in a penetrating mode from front to back, the two synchronous frames are symmetrically welded to the top end of the rod section in the demonstration box, the two connecting shafts are welded to the top end of the rod section, and the pressing frame is installed on the two connecting shafts in a sliding mode.
Preferably, the two supporting frames are installed in a pushing mode through springs, the heights of the two supporting frames and the heights of the middle clamping grooves of the two clamping plates are equal, and the test materials can be jacked at the top ends of the two supporting frames.
Preferably, the connecting frame comprises short insertion rods and sliding shafts, the connecting frame is formed by jointly combining a main body beam plate, two sliding shafts welded at the bottom of the main body beam plate at intervals in a hanging mode and three short insertion rods welded at the top end of the main body beam plate at intervals in a arranging mode, and the connecting frame is connected with the positioning frame in a sliding mode through the two sliding shafts at the bottom.
Preferably, the clamping plate comprises a connecting rod, shaft sleeves, a top frame and a cross positioning frame, the back parts of the front clamping plate and the back clamping plate are respectively welded and supported with one top frame, the back parts of the left clamping plate and the right clamping plate are respectively welded and supported with two shaft sleeves, and the two top frames are slidably inserted in the two shaft sleeves; the four top frames are all rotatably connected with a connecting rod, and the tail ends of the four connecting rods are rotatably hung and connected with a cross-shaped positioning frame.
Preferably, the cardboard still includes the threaded rod, two places around, the top frame and control four shaft sleeves correspond and slide the four sides lateral wall of crossing the demonstration case, and all run through on two places of the top frame about and have screwed a threaded rod, and these two threaded rods are connected with two cardboards through two thread bushings.
Preferably, the pressure frame includes stull axostylus axostyle and thin inserted bar, the pressure frame is for invering the installation, and its top welding has a stull axostylus axostyle, pushes away the cover through the spring on the interlude of this stull axostylus axostyle and slidably installs two thin inserted bars.
Preferably, the center of the bottom of the cross-shaped positioning frame is welded with an inserting ring, the middle short inserting rod is matched with the inserting ring in a sliding insertion manner, an inserting hole is formed in the middle section of the bottom support connecting rod of the two synchronous frames, and the left short inserting rod and the right short inserting rod are matched with the inserting holes in a sliding insertion manner.
Preferably, the middle section of the sliding shaft at the bottom side is provided with a front group of jacks and a rear group of jacks, and two vertical insertion rods of the insertion frame slide back and forth and are selectively in insertion fit with the two groups of jacks.
Compared with the prior art, the invention has the beneficial effects that:
1. when the clamping plates are gathered to slide to extrude the material, the two supporting frames can be pushed to slide, so that the blocking obstacle to the front clamping plate and the rear clamping plate is avoided, and the normal implementation of mechanical deformation demonstration is ensured;
2. the pressing frame can be attached to the inner wall of the rear side of the demonstration box in a sliding mode (as shown in fig. 4) along the front and back of the connecting shaft when the demonstration box is not used, the pressing frame is prevented from being fixedly suspended and supported at the center of the demonstration box and being blocked to be abutted to the top end of a test material, the pressing frame is prevented from abutting and limiting the material with four sides extruded and arched and deformed, in addition, the pressing frame can be inserted and positioned in a side edge hiding idle state and a middle abutting and pressing use state through two thin inserting rods, and the pressing frame is prevented from sliding and shifting back and forth;
3. the electric cylinder can transmit power to two synchronous frames or four clamping plates through power transmission of the connecting frame, so that the device has two stress demonstration capabilities, namely four-side extrusion demonstration of the testing material by synchronous gathering and contraction of the four clamping plates and center jacking demonstration of the testing material by the pressing frame;
4. the connecting frame can slide along the positioning frame only by simple forward and backward sliding actions, the inserting matching relation of three short inserting rods is changed, the power switching of two synchronous frames and four clamping plates is completed, and the switching operation of two demonstration use states is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic bottom three-dimensional structure of the present invention;
FIG. 3 is a schematic view of the internal structure of the demonstration box of the present invention;
FIG. 4 is a schematic view of the mounting position of the clamping plate according to the present invention;
FIG. 5 is a schematic view of the installation position of the synchronization frame according to the present invention;
FIG. 6 is a schematic structural view of the sliding-out state of the pressing frame according to the present invention;
FIG. 7 is a schematic three-dimensional structure of a positioning frame according to the present invention;
FIG. 8 is a schematic view of the structure of the connecting frame of the present invention;
FIG. 9 is a bottom view of the connecting frame of the present invention;
FIG. 10 is a schematic view of a press frame structure according to the present invention;
in the figure: 1. a demonstration box; 101. a cross brace positioning shaft; 102. a support frame; 2. a support leg frame; 3. an electric cylinder; 301. a positioning frame; 302. inserting a frame; 303. a tension sensor; 4. a synchronization frame; 401. a connecting shaft; 5. a connecting frame; 501. a short insertion rod; 502. a slide shaft; 6. clamping a plate; 601. a connecting rod; 602. a shaft sleeve; 603. a top frame; 604. a threaded rod; 605. a cross positioning frame; 7. a camera; 8. pressing the frame; 801. a cross-brace shaft lever; 802. thin inserted bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 10, an embodiment of the present invention includes: a material mechanics deformation stress demonstration device with real-time image transmission comprises a demonstration box 1, a synchronous frame 4 and a connecting frame 5, wherein the demonstration box 1 comprises cross-brace positioning shafts 101 and supporting frames 102, the whole demonstration box 1 is of a square structure, the top end of the demonstration box is tightly covered with a transparent cover plate, the bottom sections of the front inner wall and the rear inner wall of the demonstration box 1 are symmetrically supported with the two cross-brace positioning shafts 101, and the two supporting frames 102 are arranged on the two cross-brace positioning shafts 101 in a sliding sleeved mode; the demonstration box 1 is fixedly welded between the top end sections of the two supporting leg frames 2, and the electric cylinder 3 is locked and vertically supported at the middle position of the supporting and connecting plate at the bottoms of the two supporting leg frames 2; the electric cylinder 3 comprises a positioning frame 301, an inserting frame 302 and a tension sensor 303, the topmost end of a telescopic rod of the electric cylinder 3 is fixedly locked, sleeved and fixed with the positioning frame 301, the bottom rod section of the position where the positioning frame 301 is located is connected with the tension sensor 303 in a screwing mode, and the inserting frame 302 is slidably inserted and arranged on the middle section of the positioning frame 301 through a spring pushing device; the connecting frame 5 is installed at the top end of the positioning frame 301 in a sliding manner, and a supporting connecting plate at the bottom of the inserting frame 302 slides on a rod section at the lower side of the tension sensor 303 in a sleeved manner; four long-strip clamping plates 6 symmetrically penetrate through and are inserted into the peripheral side walls of the demonstration box 1; four cameras 7 are symmetrically and tightly locked and installed on the middle sections of the left inner wall and the right inner wall of the demonstration box 1, and the four cameras 7 are respectively arranged on two sides of the left clamping plate 6 and the right clamping plate 6; the synchronous frame 4 comprises a connecting shaft 401, two synchronous frames 4 are symmetrically inserted in a penetrating manner from front to back on a bottom plate of the demonstration box 1, the two synchronous frames 4 are symmetrically welded at the top ends of rod sections in the demonstration box 1, the two connecting shafts 401 are symmetrically welded at the top ends of the rod sections, and the pressing frame 8 is installed on the two connecting shafts 401 in a sliding manner; the clamping plate 6 comprises a connecting rod 601, shaft sleeves 602, top frames 603 and a cross positioning frame 605, the back parts of the front and rear clamping plates 6 are respectively welded and supported with one top frame 603, the back parts of the left and right clamping plates 6 are respectively welded and supported with two shaft sleeves 602, and the two top frames 603 are slidably inserted in the two shaft sleeves 602; the four top frames 603 are rotatably connected with one connecting rod 601, the tail ends of the four connecting rods 601 are rotatably hung with one cross positioning frame 605, the four clamping plates 6, the four connecting rods 601, the four top frames 603 and the cross positioning frame 605 form a four-connecting-rod gathering slider mechanism together, the electric cylinder 3 of the mechanism can pull down to drive the four clamping plates 6 to gather and contract synchronously to extrude a test material in four directions, and four-side extrusion deformation stress demonstration is implemented; the pressing frame 8 comprises a cross-brace shaft lever 801 and thin insertion rods 802, the pressing frame 8 is installed in an inverted mode, the top end of the pressing frame is welded with the cross-brace shaft lever 801, the middle section of the cross-brace shaft lever 801 is provided with the two thin insertion rods 802 in a sliding mode through a spring jacking sleeve, and the two synchronous frames 4 can drive the pressing frame 8 to perform center jacking on a test material to perform center jacking stress deformation demonstration.
The specific brand of the tension sensor 303: the best precious type: SBT674-10N SBT674-20N
Further, the two supporting frames 102 are installed by pushing through springs, the two supporting frames 102 are as high as the middle clamping grooves of the two clamping plates 6, the test material can be pushed to the top ends of the two supporting frames 102, and the two supporting frames 102 can support and place the test material.
Further, the link 5 includes short inserted bar 501 and slide shaft 502, the link 5 is formed by the main part beam slab, two slide shafts 502 that the interval hangs and welds in main part beam slab bottom to and three short inserted bars 501 that interval arrangement welded on main part beam slab top make up jointly, and link 5 slides with locating frame 301 through two slide shafts 502 in bottom and is connected, only needs simple back and forth to push away the smooth action and just can make the link 5 slide along locating frame 301, changes the grafting cooperation relation of three short inserted bars 501, accomplishes the power switching to two synchronous frames 4 and four cardboard 6, makes the switching operation of two kinds of demonstration user states convenient.
Further, cardboard 6 still includes threaded rod 604, two places around and the top frame 603 and control four places axle sleeve 602 and correspond and slide the four sides lateral wall of crossing demonstration case 1, and control and all run through on two places top frame 603 and twist soon and have a threaded rod 604, and these two threaded rods 604 are connected with two cardboard 6 through two thread bushings, can adjust the distance of stretching out of two cardboard 6 about through threaded rod 604, make four cardboard 6 can the different test material of clamping location length, use comparatively extensively.
Further, the welding of the bottom center department of cross locating rack 605 has an insert ring, middle short inserted bar 501 and this insert ring slip grafting cooperation, and seted up a jack on the interlude of the 4 bottom vaulting poles of two synchronous frames, control two short inserted bar 501 and these two jacks slip grafting cooperation, power transmission through link 5, electronic jar 3 can give two synchronous frames 4 or four cardboard 6 with power transmission, make the device have two kinds of stress demonstration ability, four sides extrusion demonstration that shrink was gone on to the test material is gathered together in step to four sides extrusion demonstration and the central roof pressure demonstration that the pressure frame 8 goes on to the test material of the device of contracting, a ware is dual-purpose, the function of device has been expanded, the compatibility of device demonstration use has been promoted, application range is wide, the practicality preferred.
Further, a front group of jacks and a rear group of jacks are formed in the middle section of the sliding shaft 502 at the bottom side, two vertical insertion rods of the insertion frame 302 slide back and forth and are selectively inserted and matched with the two groups of jacks, and the insertion frame 302 can insert and position the connecting frame 5 in a use state of top insertion connection with the two synchronous frames 4 or in a use state of top insertion connection with the connecting frame 5.
The working principle is as follows: when in use, the test material can be jacked at the top ends of the two support frames 102;
center push down test: firstly, two thin insertion rods 802 are pulled out, then the pressing frame 8 is placed on the middle section of the two connecting shafts 401 in a sliding mode, the two thin insertion rods 802 are loosened to insert and position the pressing frame 8 back (as shown in fig. 6), then the inserting frame 302 is pulled down, the connecting frame 5 is slid forwards to enable the middle short insertion rod 501 to be matched with an insertion ring at the bottom of the connecting frame 5 in a sliding and inserting mode, power transmission of the electric cylinder 3 and the pressing frame 8 is completed, then a top cover of the demonstration box 1 is closed, the electric cylinder 3 is started, the pressing frame 8 is pulled down under contraction of the electric cylinder 3 to conduct center jacking deformation demonstration on a test material, the four cameras 7 can shoot all deformation processes and display the deformation processes through a screen, and the deformation stress can be tested by the tension sensor 303;
four-side pressurization test: first-selected lower extraction and insertion frame 302, with linking frame 5 back slip make about two short inserted bars 501 with synchronous frame 4 bottom in the middle of the two jacks sliding plug-in cooperation of department, accomplish the power transmission of four cardboard 6 and electronic jar 3, close the top cap that will demonstrate case 1 and start electronic jar 3 after that, gather together slider mechanism through four connecting rods that four connecting rod 601 and four top frame 603 and cross locating rack 605 constitute jointly, electronic jar 3 can pull down drive four cardboard 6 and gather together the shrink in step and carry out the quadriversal extrusion to the test material, implement four sides extrusion deformation stress demonstration.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a material mechanics deformation stress presentation device that possesses real-time image transmission which characterized in that: the demonstration box comprises a demonstration box (1), a synchronous frame (4) and a connecting frame (5), wherein the demonstration box (1) comprises a cross-brace positioning shaft (101) and a supporting frame (102), the demonstration box (1) is integrally of a square structure, a transparent cover plate is tightly covered at the top end of the demonstration box, two cross-brace positioning shafts (101) are symmetrically supported on the bottom sections of the front inner wall and the rear inner wall of the demonstration box (1), and the two supporting frames (102) are slidably sleeved on the two cross-brace positioning shafts (101); the demonstration box (1) is welded and fixed between the top end sections of the two supporting leg frames (2), and the electric cylinder (3) is locked and vertically supported at the middle position of the supporting and connecting plate at the bottoms of the two supporting leg frames (2); the electric cylinder (3) comprises a positioning frame (301), an inserting frame (302) and a tension sensor (303), the topmost end of a telescopic rod of the electric cylinder (3) is fixedly locked, sleeved and fixed with the positioning frame (301), the bottom rod section of the position of the positioning frame (301) is connected with the tension sensor (303) in a screwing mode, and the inserting frame (302) is inserted into the middle section of the positioning frame (301) in a sliding mode through a spring jacking and inserting mode; the connecting frame (5) is installed at the top end of the positioning frame (301) in a sliding and inserting mode, and a supporting connecting plate at the bottom of the inserting frame (302) is sleeved on a rod section at the lower side position of the tension sensor (303) in a sliding and inserting mode; four long-strip clamping plates (6) symmetrically penetrate through and are inserted into the side walls on the periphery of the demonstration box (1); four cameras (7) are symmetrically and tightly locked and installed on the middle sections of the left inner wall and the right inner wall of the demonstration box (1), and the four cameras (7) are respectively arranged on two sides of the left clamping plate (6) and the right clamping plate (6); synchronous frame (4) are including connecting axle (401), it has two synchronous frames (4) to be the front and back symmetry on the bottom plate of demonstration case (1) and run through the cartridge, and the top symmetry welding that this two synchronous frames (4) are located demonstration case (1) inside pole section has two connecting axles (401), and presses frame (8) to install on this two connecting axles (401) with the sliding sleeve.
2. The device for demonstrating mechanical deformation stress of material with real-time image transmission according to claim 1, wherein: the two supporting frames (102) are installed in a pushing mode through springs, the heights of the two supporting frames (102) and the heights of the middle clamping grooves of the two clamping plates (6) are equal, and the test materials can be placed at the top ends of the two supporting frames (102) in a propping mode.
3. The device for demonstrating mechanical deformation stress of material with real-time image transmission according to claim 1, wherein: the connecting frame (5) comprises short insertion rods (501) and sliding shafts (502), the connecting frame (5) is formed by combining main body beam plates, the sliding shafts (502) at two positions of the bottom of the main body beam plates are welded at intervals in a hanging mode, and three short insertion rods (501) welded to the top ends of the main body beam plates at intervals are combined together, and the connecting frame (5) is connected with the positioning frame (301) in a sliding mode through the sliding shafts (502) at two positions of the bottom.
4. The demonstration apparatus of mechanical deformation stress with real-time image transmission of claim 1, wherein: the clamping plate (6) comprises a connecting rod (601), shaft sleeves (602), top frames (603) and a cross positioning frame (605), wherein the back parts of the front clamping plate (6) and the back parts of the rear clamping plate (6) are respectively welded and supported with one top frame (603), the back parts of the left clamping plate (6) and the right clamping plate (6) are respectively welded and supported with two shaft sleeves (602), and the two top frames (603) are slidably inserted into the two shaft sleeves (602); the top frames (603) at four positions are rotatably connected with a connecting rod (601), and the tail ends of the connecting rods (601) at four positions are rotatably hung with a cross positioning frame (605).
5. The device for demonstrating mechanical deformation stress of material with real-time image transmission according to claim 1, wherein: cardboard (6) still include threaded rod (604), two places around, top frame (603) and control four places axle sleeve (602) and correspond and slide the four sides lateral wall of crossing demonstration case (1), and all run through on two places of top frame (603) and revolve and twist about and have a threaded rod (604), and these two threaded rod (604) are connected with two cardboard (6) through two threaded sleeve.
6. The device for demonstrating mechanical deformation stress of material with real-time image transmission according to claim 1, wherein: the pressing frame (8) comprises a cross-support shaft lever (801) and thin insertion rods (802), the pressing frame (8) is installed in an inverted mode, the top end of the pressing frame is welded with the cross-support shaft lever (801), and the middle section of the cross-support shaft lever (801) is provided with the thin insertion rods (802) in two positions in a sliding mode through a spring ejection sleeve.
7. The device for demonstrating mechanical deformation stress of material with real-time image transmission according to claim 4, wherein: the bottom center of the cross positioning frame (605) is welded with an insert ring, the middle short insert rod (501) is matched with the insert ring in a sliding insertion mode, an insertion hole is formed in the middle section of the bottom support connecting rod of the two synchronous frames (4), and the left short insert rod (501) and the right short insert rod (501) are matched with the insertion holes in a sliding insertion mode.
8. The device for demonstrating mechanical deformation stress of material with real-time image transmission according to claim 3, wherein: a front group of jacks and a rear group of jacks are formed in the middle section of the sliding shaft (502) at the bottom side, and two vertical insertion rods of the insertion frame (302) slide back and forth to be selectively inserted and matched with the two groups of jacks.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113305186A (en) * | 2021-07-29 | 2021-08-27 | 南通瓯海电气设备有限公司 | Omnibearing bending CNC equipment for nonferrous metal or alloy |
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| CN111627301B (en) | 2021-11-12 |
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