CN108436763B - A clamping device for clamping a sample during polishing by a polishing machine - Google Patents

Abstract

The application provides a clamping device used for clamping samples when a polishing machine polishes, including an upper base, a lower base, a reciprocating frame, a compression spring support seat, a compression spring support rod, a compression spring, and a compression spring compression rod , sleeve, storage box, compression cover, compression cover guide rod, driving hook and clamping assembly; use the principle of balance between the friction force of the sample and the spring force of the compression spring to control the extrusion of the abrasive paste, when When the friction force is decomposed and greater than the spring force of the compression spring, the lower base slides and finally drives the compression cover to slide down, thereby extruding the abrasive paste; when the friction force is decomposed and is less than the spring force, the compression spring pushes the compression spring to return the pressure rod Finally, it drives the pressing cover to slide upwards, thereby stopping extruding the abrasive paste; such a repeated cycle makes there always be an appropriate amount of abrasive paste on the friction surface between the polishing disc and the sample, thereby realizing effective polishing of the sample during polishing. , Stable and firm clamping, improving the polishing accuracy and polishing quality.

Description

A clamping device for clamping a sample during polishing by a polishing machine

technical field

The invention relates to the technical field of experimental instruments, in particular to a clamping device used for clamping a sample when a polishing machine polishes.

Background technique

With the development of modern precision manufacturing technology and the in-depth study of tribology, the role of surface topography is becoming more and more important and has become the focus of research. And when studying different surface topography, a large number of experiments are needed to demonstrate the role of surface topography under different working conditions.

Polishing machines play a very important role in both actual production and experiments, especially in the experimental stage. When processing new surface textures, the processing surface must first be polished and cleaned.

Traditional laboratory polishing machines have problems such as low processing efficiency, lack of supporting sample clamping devices, processing accuracy and unstable processing quality.

As the demand for polishing machines continues to increase, how to improve their shortcomings has become a crucial issue.

Contents of the invention

The object of the present invention is to provide a clamping device for clamping a sample when a polishing machine is polishing, which can effectively, stably and firmly clamp the sample during polishing, and improve the polishing precision and polishing quality.

In order to solve the above-mentioned technical problems, the technical solution provided by the application is:

A clamping device for clamping a sample during polishing by a polishing machine, comprising an upper base, a lower base, a reciprocating frame, a compression spring support seat, a compression spring support rod, a compression spring, a compression spring compression rod, a sleeve, Material storage box, compression cover, compression cover guide rod, driving hook and clamping assembly for clamping the sample;

The upper surface of the upper base is provided with a plurality of guide distance-limited through holes with a rectangular cross section, and a chute is provided on the lower surface of the upper base;

The upper surface of the lower base is provided with a boss for cooperating with the chute, and the boss is inserted into the chute to form a sliding pair for the lower base to move along the length direction of the chute. Reciprocating linear sliding;

The reciprocating frame is connected with the lower base bolt through the guide distance-limiting bolt passing through the guide distance-limiting through hole, so that the lower base drives the reciprocating frame to move linearly along the length direction of the chute , the length of the guide distance-limiting through hole is greater than the outer diameter of the screw rod of the guide distance-limiting bolt;

The compression spring support seat is arranged on the upper surface of the upper base, one end of the compression spring support rod is fixed in the through hole on the compression spring support seat, and the other end of the compression spring support rod is connected to the The through hole on the compression rod of the compression spring is slidingly connected, and the sleeve is sleeved on the support rod of the compression spring through bolt connection for adjusting the position of the sleeve on the support rod of the compression spring. The compression spring compression rod is connected to the reciprocating frame in transmission so that the reciprocation frame drives the compression spring compression rod to move linearly along the length direction of the chute, and the compression spring is sleeved on the On the compression spring support rod, one end of the compression spring is against the compression spring of the compression spring and the other end of the compression spring is against the sleeve for pushing the compression spring of the compression spring back;

The material storage box is rotatably arranged in the buckle opening on the upper base through a buckle connection, at least two extrusion ports are opened on the lower bottom surface of the material storage box, and the pressing cover is arranged on the In the material storage box, the pressing cover is in sealing and sliding connection with the inner wall of the material storage box;

The bottom end of the driving hook is in transmission connection with the reciprocating frame, the top end of the driving hook is pinned to one end of the pressing cover guide rod, and the other end of the pressing cover guide rod is connected to the pressing cover guide rod. The upper cover surface of the tight cover is pin-connected so that the guide rod of the compression cover drives the compression cover to reciprocate and slide up and down in the storage box, and the top end of the driving hook and the top of the compression cover The vertical linear distance between the planes where the upper cover surface is located is less than the length of the compression cover guide rod;

The clamping component is disposed on the lower surface of the lower base.

Preferably, the clamping assembly includes a left collet, a left bolt, a left collet support seat, a right collet, a right bolt and a right collet support seat;

The left chuck support seat is arranged on the lower surface of the lower base, and the screw rod of the left bolt is penetrated and fixed in the internal threaded hole on the left chuck support seat through threaded connection, and the left chuck It is connected with the free end ball joint of the left bolt;

The right chuck support seat is arranged on the lower surface of the lower base, the screw rod of the right bolt is penetrated and fixed in the internal threaded hole on the right chuck support seat through threaded connection, and the right chuck It is connected with the free end ball joint of the right bolt;

The left bolt and the right bolt are symmetrical to each other so as to clamp the sample by adjusting the distance between the left clamp and the right clamp by screwing the left bolt and/or the right bolt.

Preferably, the axial centerlines of the left bolt and the right bolt are perpendicular to the length direction of the chute;

The lengthwise direction of the guiding and distance-limiting through hole is parallel to the lengthwise direction of the chute.

Preferably, the reciprocating frame is a planar I-shaped structure composed of one longitudinal support rod and two transverse support rods;

The top ends of the guide spacer bolts are connected with the transverse support rods.

Preferably, the compression spring rod is bolted to the longitudinal support rod in the reciprocating frame for adjusting the position of the compression spring rod on the longitudinal support rod.

Preferably, the driving hook is an L-shaped structure composed of a horizontal rod and a vertical rod, and the horizontal rod and/or the vertical rod are telescopic rods to adjust the uppermost position where the compression cover slides upwardly in the storage box. position and the lowest position where the seal slides downward.

Preferably, a handle is provided on the upper surface of the upper base.

The application provides a clamping device for clamping samples when a polishing machine is polishing, including an upper base, a lower base, a reciprocating frame, a compression spring support seat, a compression spring support rod, a compression spring, and a compression spring compression rod , sleeve, material storage box, compression cover, compression cover guide rod, driving hook and clamping assembly; the principle of balance between the friction force of the sample and the spring force of the compression spring is used to control the extrusion of the abrasive paste When the friction force decomposes and is greater than the spring force of the compression spring, the lower base slides, and the sliding of the lower base first drives the reciprocating motion frame to move through a series of transmission connections, and then drives the drive hook to move, and then drives the compression cover guide rod to move, and then drives the pressure The tight cover slides downward in the storage box to squeeze out the grinding paste;

When the friction force is decomposed and less than the spring force, the compression spring pushes the pressure spring compression rod back, and the movement of the pressure spring compression rod first drives the reciprocating motion frame to move through a series of transmission connections, and then drives the drive hook to move, and then drives the compression cover to guide The movement of the rod then drives the compression cover to slide upward in the storage box, thereby stopping the extrusion of the grinding paste;

Such repeated cycles make there always be an appropriate amount of abrasive paste on the friction surface between the polishing disc and the sample during polishing, so that the friction between the polishing disc and the sample is always in the dynamic stable range during polishing, thus finally realizing the The sample is effectively, stably and firmly clamped during polishing, which improves the polishing accuracy and polishing quality.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a clamping device used for clamping a sample when a polishing machine is polished according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a three-dimensional structure from another angle of Fig. 1;

Fig. 3 is a schematic diagram of a three-dimensional structure from another angle of Fig. 1;

FIG. 4 is a schematic perspective view of another perspective of FIG. 1 .

In the figure: 1 upper base, 101 guide distance limiting through hole, 102 chute;

2 lower bases, 201 bosses;

3 reciprocating frame, 301 longitudinal support rod, 302 horizontal support rod, 303 guide bolt;

401 compression spring support seat, 402 compression spring support rod, 403 compression spring, 404 compression spring compression rod, 405 sleeve;

501 storage box, 502 compression cover, 503 compression cover guide rod, 504 driving hook, 505 extrusion port;

6 clamping components, 601 left chuck, 602 left bolt, 603 left chuck support seat, 604 right chuck, 605 right bolt, 606 right chuck support seat;

7 handles.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "central", "axial", "radial", "longitudinal", "transverse", "length", "width", "upper", "lower" , "front", "back", "left", "right", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. Based on the orientation or positional relationship shown in the actual use of the clamping device provided in this application, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, in order to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the invention.

Referring to Figures 1-4, Figure 1 is a schematic perspective view of the three-dimensional structure of a clamping device for clamping a sample during polishing by a polishing machine provided by an embodiment of the present invention; Figure 2 is a schematic perspective view of the three-dimensional structure of another angle of Figure 1 ; FIG. 3 is a schematic diagram of the three-dimensional structure of FIG. 1 at another angle; FIG. 4 is a schematic diagram of the three-dimensional structure of FIG. 1 at another angle.

The application provides a clamping device for clamping a sample when polishing a polishing machine, including an upper base 1, a lower base 2, a reciprocating frame 3, a compression spring support seat 401, a compression spring support rod 402, and a compression spring 403 , compression spring compression rod 404, sleeve 405, material storage box 501, compression cover 502, compression cover guide rod 503, driving hook 504 and clamping assembly for clamping the sample;

The upper surface of the upper base 1 is provided with several guide distance-limiting through holes 101 with a rectangular cross-section, and the lower surface of the upper base 1 is provided with a chute 102;

The upper surface of the lower base 2 is provided with a boss 201 for cooperating with the chute 102, and the boss 201 is inserted into the chute 102 to form a sliding pair for the lower base 2 to move along the chute. The longitudinal direction of the chute 102 reciprocates and linearly slides;

The reciprocating frame 3 is bolted to the lower base 2 through the guide distance-limiting bolt 303 passing through the guide distance-limiting through hole 101, so that the lower base 2 drives the reciprocating frame 3 along the slide. The length direction of the groove 102 moves linearly, and the length of the guide distance-limiting through hole 101 is greater than the outer diameter of the screw rod of the guide distance-limiting bolt 303;

The compression spring support seat 401 is arranged on the upper surface of the upper base 1, and one end of the compression spring support rod 402 is fixed in the through hole on the compression spring support seat 401, and the compression spring support rod 402 The other end is slidingly connected with the through hole on the compression spring rod 404, and the sleeve 405 is sleeved on the compression spring support rod 402 through a bolt connection for adjusting the sleeve 405 in the The position on the compression spring support rod 402, the compression spring compression rod 404 is in transmission connection with the reciprocating frame 3 for the reciprocating motion frame 3 to drive the compression spring compression rod 404 along the chute 102 The length direction of the compression spring 403 is sleeved on the compression spring support rod 402, one end of the compression spring 403 is against the compression spring 404 and the other end of the compression spring 403 is against the compression rod 404. The sleeve 405 is used to push the compression spring pressing rod 404 back;

The material storage box 501 is rotatably arranged in the buckle opening on the upper base 1 through a buckle connection, and at least two extrusion ports 505 are opened on the lower bottom surface of the material storage box 501, and the pressing cover 502 is set in the material storage box 501, and the pressing cover 502 is in sealing and sliding connection with the inner wall surface of the material storage box 501;

The bottom end of the driving hook 504 is in transmission connection with the reciprocating frame 3 , the top end of the driving hook 504 is pinned to one end of the pressing cover guide rod 503 , and the other end of the pressing cover guide rod 503 is pinned. One end is connected with the pin shaft on the upper cover surface of the compression cover 502 so that the compression cover guide rod 503 drives the compression cover 502 to reciprocate and slide up and down in the storage box 501, and the driving hook The vertical linear distance between the top of 504 and the plane where the upper cover surface of the compression cover 502 is located is less than the length of the compression cover guide rod 503;

The clamping assembly 6 is disposed on the lower surface of the lower base 2 .

In one embodiment of the present application, the clamping assembly includes a left chuck 601, a left bolt 602, a left chuck support seat 603, a right chuck 604, a right bolt 605, and a right chuck support seat 606;

The left chuck support seat is arranged on the lower surface of the lower base 2, and the screw rod of the left bolt is penetrated and fixed in the internally threaded hole on the left chuck support seat through threaded connection. The head is connected with the free end ball joint of the left bolt;

The right chuck support seat is arranged on the lower surface of the lower base 2, and the screw rod of the right bolt is penetrated and fixed in the internal threaded hole on the right chuck support seat through threaded connection. The head is connected with the free end ball joint of the right bolt;

The left bolt and the right bolt are symmetrical to each other so as to clamp the sample by adjusting the distance between the left clamp and the right clamp by screwing the left bolt and/or the right bolt.

In one embodiment of the present application, the axial centerlines of the left bolt and the right bolt are perpendicular to the length direction of the chute 102;

The lengthwise direction of the guiding and distance-limiting through hole 101 is parallel to the lengthwise direction of the chute 102 .

In one embodiment of the present application, the reciprocating frame 3 is a planar I-shaped structure composed of a longitudinal support rod 301 and two transverse support rods 302;

The top ends of the guide spacer bolts 303 are connected to the transverse support rods 302 .

In one embodiment of the present application, the compression spring compression rod 404 is bolted to the longitudinal support rod 301 in the reciprocating frame 3 for adjusting the tension of the compression spring compression rod 404 on the longitudinal support rod. The location on the 301.

In one embodiment of the present application, the driving hook 504 is an L-shaped structure composed of horizontal rods and vertical rods, and the horizontal rods and/or vertical rods are telescopic rods to adjust the presence of the compression cover 502. The uppermost position of the upward sealing slide and the lowermost position of the downward sealing slide in the magazine 501 .

In one embodiment of the present application, a handle 7 is provided on the upper surface of the upper base 1 .

In the present application, several guiding distance-limiting through-holes 101 with rectangular cross-sections are opened on the upper surface of the upper base 1, and the reciprocating frame 3 passes through the guiding distance-limiting through-holes 101. 303 is bolted to the lower base 2 for the lower base 2 to drive the reciprocating frame 3 to move linearly along the length direction of the chute 102, and the length of the guide distance-limiting through hole 101 is greater than that of the guide The outer diameter of the screw rod of the distance-limiting bolt 303; the mutual cooperation of the guide distance-limiting through hole 101 and the guide distance-limiting bolt 303 here is used to directly guide the moving direction of the reciprocating frame 3 and limit the size of its moving distance, and indirectly guide the The moving direction of the base 2 and the size of the distance to limit the movement make the reciprocating frame 3 move linearly along the length direction of the chute 102 to avoid swinging left and right.

In the present application, the upper surface of the lower base 2 is provided with a boss 201 for cooperating with the sliding groove 102, and the boss 201 is inserted into the sliding groove 102 to form a sliding pair for the lower base 2. The base 2 slides reciprocally linearly along the length direction of the chute 102; the sliding pair here is used to directly guide the moving direction of the lower base 2 and limit the size of its moving distance, and indirectly guide the moving direction of the reciprocating frame 3 and limit its movement. The size of the moving distance makes the lower base 2 slide linearly along the length direction of the chute 102 to avoid swinging left and right.

In this application, the sleeve 405 is sleeved on the compression spring support rod 402 through bolt connection for adjusting the position of the sleeve 405 on the compression spring support rod 402, by adjusting the sleeve The position of 405 on the compression spring support rod 402 can adjust the initial compression degree of the compression spring 403, and then adjust the initial spring force of the compression spring 403;

The compression spring compression rod 404 is bolted to the longitudinal support rod 301 in the reciprocating frame 3 for adjusting the position of the compression spring compression rod 404 on the longitudinal support rod 301, by adjusting the compression spring The position of the compression rod 404 on the longitudinal support rod 301 can adjust the initial compression degree of the compression spring 403 , and then adjust the initial spring force of the compression spring 403 .

In this application, the principle of balance between the frictional force of the sample and the spring force of the compression spring 403 is used to control the extrusion of the abrasive paste. Although the frictional force of the sample and the spring force of the compression spring 403 are all forces, the unit They are the same, but the force directions of the two are not on a straight line, so the two cannot be directly compared in size, and can only be decomposed by force analysis, and the friction force on the sample is decomposed into the straight line direction where the spring force is located. Directly compare the size with the spring force;

Polishing requires a certain amount of friction, without friction there is no way to polish, so the friction cannot be zero, as long as the friction does not exceed the upper limit, so the initial compression of the compression spring 403 cannot be zero, that is, the initial state of the compression spring 403 Can not be uncompressed free state, the initial spring force of clip spring 403 cannot be zero;

In this application, abrasive paste is necessary during normal polishing. Therefore, the frictional force balanced with the spring force of stage clip 403 in this application should be the frictional force that the sample receives during polishing. When there is abrasive paste, the frictional force Force is the friction force between the abrasive paste on the polishing disc and the sample, and the friction force is the friction force between the polishing disc and the sample when there is no abrasive paste;

The magnitude of the friction force is not constant, it can be large or small, and there are many factors that affect its size. When there is more abrasive paste, the friction force will definitely become smaller. When polishing, the staff needs to use the holding device Press it on the polishing disc. At this time, the staff's hand strength is strong, and the friction force must be large. If the hand strength is weak, the friction force must also be small. It can be seen that the staff's hand pressure (hand strength) affects the above-mentioned friction force. a major factor of

The spring force of the compression spring 403 will only become larger as it is further compressed until it reaches a balance with the frictional force, that is, the spring force of the compression spring 403 is greater than or equal to the initial spring force of the compression spring 403;

In the present application, preferably, the sleeve 405 is provided with a guide distance-limiting rod, and the guide distance-limiting rod is inserted downward into the guide distance-limiting through-hole 101 in the upper base 1, where the guide distance-limiting rod is connected to the guide distance-limiting through-hole 101. The mutual cooperation of the holes 101 is used to directly guide the moving direction of the compression spring rod 404 and limit its moving distance, so that the compression spring rod 404 moves linearly along the length direction of the chute 102 to avoid swinging left and right.

In the present application, the driving hook 504 is an L-shaped structure composed of a horizontal rod and a vertical rod, and the horizontal rod and/or the vertical rod are telescopic rods to adjust the pressing cover 502 upward in the storage box 501 The uppermost position of the sealing slide and the lowermost position of the downward sealing slide;

Preferably, the horizontal bar in the above-mentioned driving hook 504 is divided into two sections, the front section bar and the rear section bar. The front section bar and the back section bar are connected by a hollow tube. Fixed connection, the rear section rod is inserted into the rear end of the hollow tube to realize the fast connection through bolts, and the length of the horizontal bar is adjusted by adjusting the length of the front section rod and/or the rear section rod inserted into the hollow tube.

The use method of the clamping device used for clamping the sample when the polishing machine is polished provided by this application:

When in use, first use the above-mentioned clamping assembly 6 to clamp the sample;

Then adjust the initial degree of compression of stage clip 403;

Then add grinding paste in the material storage box 501, then manually use the compression cover 502 to squeeze the grinding paste to the extrusion port so that the grinding paste is extruded at once but not yet extruded. There is no pressing force but close contact between the surface and the upper liquid level of the grinding paste, and at the same time, the length of the horizontal rod in the driving hook 504 is manually extended or shortened to ensure that the compression at the initial position is performed when the polishing starts. There is no pressing force but close contact between the lower surface of the cover 502 and the upper liquid surface of the grinding paste;

Then start polishing, the staff gradually and slowly contact the clamping device with the polishing disc by hand, the staff increases the hand pressure, and when the friction force on the sample is decomposed and greater than the spring force of the compression spring 403, the lower base 2 slides, and the lower base 2 slides. The sliding of the base 2 first drives the reciprocating frame 3 to move through a series of transmission connections, and then drives the driving hook 504 to move, and then drives the compression cover guide rod 503 to move, and then drives the compression cover 502 to seal and slide downward in the material storage box 501, thereby Squeeze out the abrasive paste;

Seeing that the extruded abrasive paste reaches the actual required amount, the staff reduces their hand pressure, so that the friction force on the sample is decomposed and smaller than the spring force of the compression spring 403 at this time, and the compression spring 403 pushes the compression spring The compression rod 404 returns, and the movement of the pressure spring compression rod 404 first drives the reciprocating motion frame 3 to move through a series of transmission connections, and then drives the driving hook 504 to move, and then drives the compression cover guide rod 503 to move, and then drives the compression cover 502 to move. Slide upwards in the magazine 501 to stop extruding the grinding paste;

When seeing that the previously extruded grinding paste is used up, the staff needs to use a greater hand pressure than the previous time, so that the compression cover 502 is sealed and slides down again in the material storage box 501 to a lower position than the previous time. Position, so that the abrasive paste that caused the upper liquid level to drop after the previous extrusion is extruded again;

If the staff has just contacted the clamping device with the polishing disc by hand and the abrasive paste is squeezed out, it means that the initial spring force of the compression spring 403 is set too small, and the initial compression degree of the compression spring 403 needs to be increased ;

If the staff presses the clamping device on the polishing disc with their hands and applies a hand pressure exceeding the normal reasonable upper limit, but the abrasive paste has not been squeezed out, it means that the initial spring force of the compression spring 403 is set too large, and it needs to be reduced. The initial degree of compression of the small stage clip 403;

In this way, by controlling the hand pressure (hand strength) of the staff, the principle of balance between the frictional force on the sample and the spring force of the compression spring 403 is used to control the timely and appropriate extrusion of the abrasive paste, so that the polishing disc is completely polished during the entire polishing process. There is an appropriate amount of abrasive paste from the beginning to the end, which finally achieves effective, stable and firm clamping of the sample during polishing, improving the polishing accuracy and polishing quality.

Methods and devices that are not described in detail in this application are all prior art and will not be repeated here.

The descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. The clamping device for clamping the sample during polishing of the polishing machine is characterized by comprising an upper base, a lower base, a reciprocating frame, a pressure spring supporting seat, a pressure spring supporting rod, a pressure spring pressing rod, a sleeve, a storage box, a pressing cover guide rod, a driving hook and a clamping assembly for clamping the sample;

a plurality of guide distance limiting through holes with rectangular cross sections are formed in the upper surface of the upper base, and a chute is formed in the lower surface of the upper base;

the upper surface of the lower base is provided with a boss matched with the chute, and the boss is inserted into the chute to form a sliding pair for the lower base to slide linearly in a reciprocating manner along the length direction of the chute;

the reciprocating frame is connected with the lower base through a guide distance limiting bolt penetrating through the guide distance limiting through hole and is used for driving the lower base to move linearly along the length direction of the sliding groove, and the length of the guide distance limiting through hole is larger than the outer diameter of a screw rod of the guide distance limiting bolt;

the compression spring supporting seat is arranged on the upper surface of the upper base, one end of the compression spring supporting rod is fixed in a through hole on the compression spring supporting seat, the other end of the compression spring supporting rod is in sliding connection with the through hole on the compression spring pressing rod, the sleeve is arranged on the compression spring supporting rod through a bolt connecting sleeve for adjusting the position of the sleeve on the compression spring supporting rod, the compression spring pressing rod is in transmission connection with the reciprocating frame for the reciprocating frame to drive the compression spring pressing rod to linearly move along the length direction of the sliding groove, the compression spring is sleeved on the compression spring supporting rod,

one end of the pressure spring abuts against the pressure spring compression rod, and the other end of the pressure spring abuts against the sleeve so as to push the pressure spring compression rod to return;

the storage box is rotatably arranged in a buckling opening on the upper base through buckling connection, at least two extrusion openings are formed in the lower bottom surface of the storage box, the compression cover is arranged in the storage box, and the compression cover is in sealing sliding connection with the inner wall surface of the storage box;

the bottom end of the driving hook is in transmission connection with the reciprocating frame, the top end of the driving hook is in pin shaft connection with one end of the pressing cover guide rod, the other end of the pressing cover guide rod is in pin shaft connection with the upper cover surface of the pressing cover, the pressing cover guide rod is used for driving the pressing cover to reciprocate up and down in the storage box in a sealing manner, and the vertical straight line distance between the top end of the driving hook and the plane of the upper cover surface of the pressing cover is smaller than the length of the pressing cover guide rod;

the clamping component is arranged on the lower surface of the lower base;

the reciprocating frame is of a planar I-shaped structure formed by a longitudinal supporting rod and two transverse supporting rods; the top end of the guide distance-limiting bolt is connected with the transverse supporting rod;

the driving hook is of an L-shaped structure formed by a horizontal rod and a vertical rod, and the horizontal rod and/or the vertical rod is/are a telescopic rod so as to adjust the uppermost position of the pressing cover in the storage box in an upward sealing sliding manner and the lowermost position in a downward sealing sliding manner.

2. The clamping device of claim 1, wherein the clamping assembly comprises a left clamp, a left bolt, a left clamp support, a right clamp, a right bolt, and a right clamp support; the left chuck support seat is arranged on the lower surface of the lower base, a screw rod of the left bolt is fixedly penetrated in an internal threaded hole on the left chuck support seat through threaded connection, and the left chuck is connected with a free end spherical hinge of the left bolt;

the right chuck support seat is arranged on the lower surface of the lower base, a screw rod of the right bolt is fixedly penetrated in an internal threaded hole on the right chuck support seat through threaded connection, and the right chuck is connected with a free end spherical hinge of the right bolt;

the left and right bolts are symmetrical to each other for clamping the sample by adjusting the spacing between the left and right clamps by screwing the left and/or right bolts.

3. The clamping device as claimed in claim 2, wherein the axial center lines of the left and right bolts are perpendicular to the length direction of the chute;

the length direction of the guide distance limiting through hole is parallel to the length direction of the sliding groove.

4. Clamping device according to claim 1, characterized in that the compression spring compression bar is bolted to a longitudinal support bar in the reciprocating frame for adjusting the position of the compression spring compression bar on the longitudinal support bar.

5. The clamping device as recited in claim 1, characterised in that a handle is provided on an upper surface of the upper base.

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