CN215882150U - Feeding device - Google Patents

Abstract

The application discloses loading attachment relates to solar photovoltaic technical field. The loading attachment specifically includes: the crystal support, the lining plate and the clamping component; the clamping assembly is connected between the crystal support and the lining plate and provided with a clamping groove; the lining plate is provided with a clamping part on the side opposite to the clamping groove, the shape of the clamping part is matched with the clamping groove, and the clamping part is embedded in the clamping groove. The feeding device of the embodiment of the application reduces the degumming process of the crystal support and the lining plate, reduces the operation intensity of operators, improves the working efficiency and further reduces the production cost of silicon rod cutting.

Description

Feeding device

Technical Field

The application belongs to the technical field of solar photovoltaic, concretely relates to loading attachment.

Background

With the rapid development of the photovoltaic industry, the application range of the solar cell is wider. Monocrystalline silicon is an important component of solar cells, and the production process of the monocrystalline silicon is also important. Generally, after the production of the silicon single crystal rod is completed, the silicon single crystal rod needs to be cut.

In the prior art, before cutting a silicon single crystal rod, an adhesive is required to be adhered and fixed on a lining plate, then the lining plate adhered with the silicon single crystal rod is adhered and fixed on a crystal support, finally the crystal support with the silicon single crystal rod is fixed on a cutting machine of a slicing machine, the silicon single crystal rod is sliced, after the silicon single crystal rod is cut, the lining plate adhered with a silicon wafer and the crystal support are required to be taken down from the slicing machine, and then a degumming procedure is carried out to separate the crystal support from the lining plate.

However, in the above cutting process of the single crystal silicon rod, a complex gluing and degumming process is performed between the lining plate and the crystal support, which not only increases the amount of glue, but also increases the gluing and degumming processes, and the used waste glue needs to be treated, thereby not only increasing the production cost, but also increasing the environmental burden, and the production process is tedious, time-consuming, energy-consuming, labor-consuming, and affects the production efficiency, so that the comprehensive cost is increased.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide a loading attachment, in current single crystal silicon rod cutting process, can save the viscose process between brilliant support and the welt and save glue purchase, can save the gluey process of coming unstuck and saving artifical that brilliant held in the palm, reduce manufacturing cost.

In order to solve the technical problem, the present application is implemented as follows:

the embodiment of the application provides a loading attachment, loading attachment includes: the crystal support, the lining plate and the clamping component; wherein

The clamping assembly is connected between the crystal support and the lining plate and provided with a clamping groove;

the lining plate is provided with a clamping part on the side opposite to the clamping groove, the shape of the clamping part is matched with the clamping groove, and the clamping part is embedded in the clamping groove.

Optionally, the clamping assembly comprises: two clamping pieces which are oppositely arranged;

the two clamping pieces are respectively connected to the crystal support, and the clamping groove is positioned between the two clamping pieces;

the loading attachment still includes: a drive assembly;

the driving assembly is respectively connected with the two clamping pieces and drives the two clamping pieces to approach each other so that the clamping portion is clamped in the clamping groove, or to separate from each other so that the clamping portion is separated from the clamping groove.

Optionally, the clamping groove comprises two grooves and an accommodating groove communicated with the two grooves;

the grooves are arranged between the clamping piece and the crystal support, and the notches of the two grooves are opposite and are respectively arranged at the two sides of the accommodating groove;

the clamping part extends to the groove from the accommodating groove.

Optionally, a clamping protrusion is further arranged on the clamping piece, and the groove is formed between the clamping protrusion and the side face, close to the lining plate, of the crystal support.

Optionally, the clamping member and the crystal support are of an integrally formed structure or detachably connected.

Optionally, the clamping groove includes: at least one of a dovetail groove and a T-shaped groove.

Optionally, a slide rail is arranged on the crystal support, and the slide rail extends along a first direction of the crystal support; the first direction is perpendicular to the length direction of the silicon rod;

the clamping piece is movably arranged on the sliding rail.

Optionally, the driving assembly includes: a driving rod and two sliding blocks;

the two sliding blocks are arranged on the sliding rail in a sliding mode, and each sliding block is connected with one clamping piece;

the driving rod is respectively connected with the two sliding blocks so as to drive the two clamping pieces to be close to or far away from each other through the sliding blocks.

Optionally, the driving rod is provided with a first external thread section and a second external thread section respectively;

a first external thread is arranged on the first external thread section, a second external thread is arranged on the second external thread section, and the thread direction of the first external thread is opposite to that of the second external thread;

the sliding block is provided with an internal thread which can be respectively matched with the first external thread and the second external thread;

the internal thread of one of the sliding blocks is meshed with the first external thread of the first external thread section, and the internal thread of the other sliding block is meshed with the second external thread of the second external thread section.

Optionally, the driving assembly further includes: a drive knob;

the drive knob is rotatably arranged on the crystal support and is fixedly connected with the drive rod.

In the embodiment of the application, the clamping component is connected between the crystal support and the lining plate and is provided with a clamping groove; the lateral surface that welt and centre gripping groove are relative is provided with the clamping part, the shape and the centre gripping groove phase-match of clamping part, and the clamping part inlays and locates the centre gripping inslot, therefore, when being applied to the silicon rod cutting with above-mentioned loading attachment, can inlay the clamping part of welt and locate the centre gripping inslot of centre gripping subassembly, thereby make reliable connection between welt and the brilliant support, just so can effectively avoid the viscose process between brilliant support and the welt, not only reduced the quantity of glue, still reduced manufacturing cost, moreover, after the silicon rod cutting finishes, can also be through deviating from the clamping part by the centre gripping inslot, make brilliant support and welt separation, the brilliant support degumming process of fungible existing usefulness, still can save the manual work, reduce manufacturing cost. The feeding device of the embodiment of the application reduces the degumming process of the crystal support and the lining plate, reduces the operation intensity of operators, improves the working efficiency and further reduces the production cost of silicon rod cutting.

Drawings

FIG. 1 is a schematic structural diagram of a loading device according to an embodiment of the present application;

fig. 2 is a second schematic structural diagram of the feeding device according to the embodiment of the present application;

FIG. 3 is a schematic sectional view taken along the line A-A in FIG. 2;

FIG. 4 is a schematic structural view of a clamping assembly according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another clamping assembly according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a liner according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another liner plate according to the embodiment of the present application.

Description of reference numerals:

10: crystal support; 20: lining plate: 30: a clamping assembly; 40: a drive assembly; 50: a silicon rod; 31: a clamping piece: 32: a clamping groove; 11: a slide rail; 312: a clamping protrusion; 41: a drive rod; 42: a slider; 43: a drive knob; 321: a groove; 322: a containing groove; 21: a clamping portion.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The feeding device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

The feeding device in the embodiment of the application includes but is not limited to be applied to a silicon rod cutting process, and can also be applied to other scenes such as material transferring and the like, and other application scenes are executed by reference.

Referring to fig. 1, a schematic structural diagram of a feeding device according to an embodiment of the present application is shown. Referring to fig. 2, a second schematic structural diagram of the feeding device according to the embodiment of the present application is shown. Referring to fig. 3, a schematic view of the cross-sectional structure along the direction a-a in fig. 2 is shown.

In this application embodiment, loading attachment specifically can include: the crystal support 10, the lining plate 20 and the clamping component 30; the clamping component 30 is connected between the crystal support 10 and the lining plate 20, and the clamping component 30 is provided with a clamping groove 32; the side of the lining plate 10 opposite to the clamping groove 32 is provided with a clamping part 21, the shape of the clamping part 21 is matched with that of the clamping groove 32, and the clamping part 21 is embedded in the clamping groove 32. The feeding device of the embodiment of the application clamps the lining plate 20 through the clamping component 30, the gluing/degumming process of the crystal support 10 and the lining plate 20 can be effectively reduced, the operation intensity of operators is reduced, the work efficiency is improved, and the production cost of silicon rod cutting is further reduced.

In the embodiment of the present application, the clamping assembly 30 may be fixedly disposed on the crystal support 10 and integrally formed with the crystal support 10, that is, the clamping groove 32 may be directly disposed on the crystal support 10, so that the connection strength between the crystal support 10 and the clamping assembly 30 is higher.

In practical application, in the silicon rod cutting process, the silicon rod needs to be bonded on the lining plate 20 through the adhesive at first, in the embodiment of the application, the silicon rod can be bonded on the lining plate 20 and is far away from the side surface of the crystal support 10, then the crystal support 10 is respectively connected with the clamping component 30, and the clamping part 21 is embedded in the clamping groove 32, so that the process of bonding between the lining plate 20 and the crystal support 10 through glue is avoided, the glue amount can be effectively reduced, the pollution to the environment is avoided, and the cost is reduced.

In the embodiment of the application, after the silicon rod 50 is cut, the clamping portion 21 is removed from the clamping groove 32 to release the clamping of the clamping assembly 30 on the lining plate 20, so that the degumming process during the separation of the crystal support 10 and the lining plate 20 in the traditional mode is avoided, and the production efficiency is improved.

In the embodiment of the present application, the clamping assembly 30 at least partially surrounds the periphery of the lining plate 20, so that the clamping assembly 30 can clamp the lining plate 20 more stably. Specifically, the clamping assembly 30 may include: two clamping pieces 31 arranged oppositely; the two clamping pieces 31 are respectively connected to the crystal support 10, and the clamping groove 32 is positioned between the two clamping pieces 31; in order to improve the convenience of the clamping piece 31 for clamping the crystal support, the feeding device may further include: a drive assembly 40; the driving assembly 40 is connected to the two clamping members 31, and the driving assembly 40 drives the two clamping members 31 to approach each other to clamp the clamping portion 21 in the clamping groove 32 or to move away from each other to disengage the clamping portion 21 from the clamping groove 32. In the embodiment of the application, the lining plate 20 is clamped by the clamping pieces 31 which are arranged oppositely, the structure is simple, and the stability is high.

In the embodiment of the present application, the clamping member 31 can be detachably connected to the wafer support 10 by a connecting member such as a bolt.

In the embodiment of the present application, the clamping groove 32 is used for clamping the lining board 20, and the specific clamping groove 32 is usually disposed in a structure matching with the shape of the lining board 20, so as to facilitate better clamping of the lining board 20. In the embodiment of the present application, the shape of the clamping groove 32 may be various, and specifically, the shape may be: cylindrical grooves, dovetail grooves, T-shaped grooves and other shaped grooves, etc. For example, when the lining board 20 has a cylindrical structure, the clamping groove 32 may also have a cylindrical shape, so that when the clamping member 31 clamps the lining board 20, the inner wall of the clamping groove 32 can be firmly attached to the outer wall of the lining board 20, thereby improving the clamping reliability.

In practical application, in order to make the clamping of the clamping member 31 to the lining plate 20 simpler and more reliable, a clamping portion 21 may be provided on a side surface of the lining plate 20 opposite to the clamping groove 32; the clamping part 21 extends into the clamping groove 32, and the shape of the clamping part 21 is matched with that of the clamping groove 32; the clamp 31 is clamped to the clamp 21. Specifically, the outer dimension of the clamping portion 21 may be smaller than the maximum outer dimension of the lining plate 20, so that the production cost of the clamping member 31 may be effectively reduced, and the volume of the feeding device may be reduced.

In the embodiment of the present application, the structure connection manner of the clamping member 31 movably disposed on the crystal support 10 may be various, and in some embodiments, the crystal support 10 may be provided with a sliding rail 11, and the sliding rail 11 extends along the first direction of the crystal support 10; the first direction is vertical to the length direction of the silicon rod; the clamping member 31 is movably disposed on the slide rail 11. It should be noted that, in the embodiment of the present application, the slide rail 11 may also be understood as a slide groove, i.e., a groove-shaped structure. In practical applications, the slide rail 11 is generally disposed along the width direction of the wafer holder 10 and penetrates the width direction of the wafer holder 10. In this application embodiment, can prescribe a limit to the slip orbit of holder 31 through slide rail 11, effectively standardize the slip of holder 31, promote the centre gripping precision of holder 31.

In the embodiment of the present application, the number of the slide rails 11 may be two, and the two slide rails 11 are disposed at intervals along the length direction of the crystal support 10. In practical applications, the clamping members 31 may be slidably disposed on two slide rails 11 at the same time, or each clamping member 31 may be slidably disposed on one slide rail 11. In the embodiment of the application, through the setting of two slide rails, can make the structure of holder 31 more stable, it is higher to the centre gripping reliability of welt.

In the embodiment of the present application, the driving assemblies 40 may correspond to the clamping members 31 one by one, that is, one driving assembly 40 corresponds to each clamping member 31, and in the case that the number of the clamping members 31 is two, the number of the driving assemblies 40 may also be two, specifically, the driving rods and the sliders of each driving assembly 40 are connected to one clamping member 31, so as to implement the movement of a single clamping member 31. In practical application, the driving assemblies 40 are arranged in one-to-one correspondence with the clamping members 31, so that independent driving of each clamping member 31 can be realized, and the movement of the clamping members 31 is more flexible. For example, when the clamping members 31 clamp the lining plate 20, one of the clamping members 31 can be kept fixed, and the other clamping member 31 clamps the lining plate 20 under the driving of the driving assembly 40, so that the operation difficulty of an operator is effectively reduced. Or, in order to enable the lining plate 20 to be centered, the driving assemblies 40 corresponding to the two clamping members 31 can simultaneously drive the clamping members 31, so as to accelerate the clamping efficiency of the clamping members 31 on the lining plate 20, and further improve the feeding efficiency of the feeding device.

In other embodiments of the present application, the driving assembly 40 may further include: a drive lever 41 and two sliders 42; the two sliding blocks 42 are both arranged on the sliding rail 11 in a sliding manner, and each sliding block 42 is connected with one clamping piece 31; the driving rods 41 are respectively connected to the two sliders 42 to move the two holding members 31 toward or away from each other via the two sliders 42. In the embodiment of the application, the two sliders are driven by one driving rod, so that the number of parts is less, the structure is simpler, and the cost is lower.

Specifically, the driving rod 41 is provided with a first external thread section and a second external thread section respectively; the first external thread section is provided with a first external thread, the second external thread section is provided with a second external thread, and the thread direction of the first external thread is opposite to that of the second external thread; the sliding block 42 is provided with an internal thread which can be respectively matched with the first external thread and the second external thread; the internal threads of one of the blocks 42 engage the first external threads of the first external thread section and the internal threads of the other block 42 engage the second external threads of the second external thread section.

In the embodiment of the present application, through threaded connection between the driving rod and the slider, the position accuracy of the two clamping pieces 31 can be controlled more accurately, and then the clamping of the clamping pieces 31 on the lining plate 20 is more reliable. Specifically, two screw thread sections with opposite directions are arranged on one driving rod 41, so that two sliders are controlled by one driving rod to run relatively (close to or away from each other), and the feeding device has the advantages that the number of parts can be effectively reduced, the cost is low, the assembly is simple, and the precision and the reliability are high.

It can be understood that, the embodiment of the present application only provides a specific implementation manner of the threaded connection between the driving rod and the slider, and in practical application, the driving rod can also push the slider to move on the sliding rail 11, so as to achieve the purpose of driving the slider by the driving rod. Specifically, the driving rod can be connected with the lining plate 20 through threads, and can also be connected with the sliding block, so that the driving rod can stretch along the direction of the sliding rail 11 through rotating the driving rod, and the driving rod can drive the sliding block to slide along the sliding rail 11. In the embodiment of the application, through threaded connection between actuating lever and the slider to drive holder 31 and carry out the centre gripping to substrate 20, positioning accuracy is high, simple to operate, and loading attachment's overall security is high.

In practical application, in a way that the sliding rail 11 and the sliding block 42 are matched, the application range of the sliding rail 11 and the sliding block is wide, and the cost is low, so that the structural design of the feeding device is simple, the feeding device is easy to realize, and the cost is low.

It should be noted that, in practical application, the clamping member 31 and the slider may be configured as an integrally formed structure, so as to effectively improve the connection reliability between the clamping member 31 and the slider; or, the clamping piece 31 is provided with a structure matched with the slide rail 11, so that the arrangement of the slide block on the slide rail 11 can be saved, and the cost of the feeding device is further reduced.

Optionally, the driving assembly 40 may further include: a drive knob 43; the driving knob 43 is rotatably disposed on the wafer holder 10, and the driving knob 43 is fixedly connected to the driving rod 41 to drive the driving rod to rotate.

In the embodiment of the present application, in order to enable the user to better control the clamping member 31 through the driving rod 41 to clamp the lining board 20, a driving knob 43 may be further provided to be connected to the driving rod, so that the driving rod can be more easily controlled to rotate by a human hand.

In the embodiment of the present application, the driving knob 43 may be rotatably connected to the crystal holder 10 by a screw thread.

Referring to fig. 4, a schematic view of an installation structure of a clamping assembly according to an embodiment of the present application is shown. Referring to fig. 5, a schematic view of an installation structure of another clamping assembly according to the embodiment of the present application is shown.

In the embodiment of the present application, in order to make the clamping member 31 clamp the lining plate 20 more tightly, the clamping groove 32 may specifically include two grooves 321, and an accommodating groove 322 communicating the two grooves 321; the grooves 321 are disposed between the clamping member 31 and the wafer holder 10, and the notches of the two grooves 321 are opposite and disposed on two sides of the accommodating groove 322, respectively. In practical applications, when the clamping member 31 clamps the lining board 20, the clamping portion 21 of the lining board 20 extends into the groove 321, so that the clamping member 31 can clamp the lining board 20 more stably.

In the embodiment of the present application, the groove 321 is disposed between the clamping member 31 and the crystal support 10, specifically, the clamping member 31 may be provided with a clamping protrusion 312, and the groove 321 is formed between the clamping protrusion 312 and the side surface of the crystal support 10 close to the lining plate 20. That is, the holding projection 312 is provided on the holding member 31, so that the groove 321 is formed on the holding projection 312 and the side surface of the wafer holder 10 close to the backing plate 20, and the structure is simpler. In practical applications, the shape of the groove 321 may be various, such as a triangular groove, a V-shaped groove, a U-shaped groove, etc.

In the embodiment of the present application, the clamping portion 21 of the liner 20 extends into the clamping groove 32 so as to be clamped by the clamping member 31, that is, the clamping portion 21 is generally disposed in a structure complementary to the clamping groove 32.

Referring to fig. 6, a schematic structural diagram of a liner plate of an embodiment of the present application is shown. Referring to fig. 7, a schematic structural view of another liner of the embodiments of the present application is shown.

In the embodiment of the application, can also set up on the clamping part 21 with recess 321 shape assorted bellying, when the grip 31 centre gripping welt 20, the bellying stretches into recess 321, under the action of silicon rod gravity, can understand to hang for the bellying and locate in recess 321 to can make the grip 31 more firm to the centre gripping of welt 20, the reliability is higher.

In the embodiment of the present application, the liner plate 20 includes, but is not limited to, a resin liner plate 20 and a glass liner plate 20, and those skilled in the art can set the liner plate according to circumstances, which is not limited in the embodiment of the present application.

Optionally, in the embodiment of the present application, in order to make the connection between the wafer holder 10 and the backing plate 20 more stable and reliable, the number of the clamping assemblies 30 may be multiple. I.e. sets of gripping assemblies 30 are provided along the length of the backing plate 20, or it is understood that pairs of gripping members 31 are provided along the length of the backing plate 20. Specifically, the number of the clamping assemblies 30 may be 2 to 4, and may be determined according to the length of the backing plate 20.

It is understood that, when the number of the clamping assemblies 30 is increased, the number of the clamping portions 21 on the backing plate 20 equal to the number of the clamping assemblies 30 is also increased because the clamping portions 21 on the backing plate 20 are arranged in one-to-one correspondence with the clamping assemblies 30.

In the embodiment of the present application, in order to simplify the processing of the crystal support 10 and the clamping member 31, the crystal support 10 structure with the guide rail can be directly and integrally formed in the processing process of the crystal support 10, and the clamping member 31 has a connecting portion matched with the guide rail, so that the connection between the clamping member 31 and the crystal support 10 can be saved, the guide rail and the sliding block are reduced, and the cost of the feeding mechanism is reduced.

To sum up, loading attachment described in this application embodiment includes following advantage at least:

in the embodiment of the application, the clamping component is connected between the crystal support and the lining plate and is provided with a clamping groove; the lateral surface that welt and centre gripping groove are relative is provided with the clamping part, the shape and the centre gripping groove phase-match of clamping part, and the clamping part inlays and locates the centre gripping inslot, therefore, when being applied to the silicon rod cutting with above-mentioned loading attachment, can inlay the clamping part of welt and locate the centre gripping inslot of centre gripping subassembly, thereby make reliable connection between welt and the brilliant support, just so can effectively avoid the viscose process between brilliant support and the welt, not only reduced the quantity of glue, still reduced manufacturing cost, moreover, after the silicon rod cutting finishes, can also be through deviating from the clamping part by the centre gripping inslot, make brilliant support and welt separation, the brilliant support degumming process of fungible existing usefulness, still can save the manual work, reduce manufacturing cost. The feeding device of the embodiment of the application reduces the degumming process of the crystal support and the lining plate, reduces the operation intensity of operators, improves the working efficiency and further reduces the production cost of silicon rod cutting.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A loading device, characterized in that, loading device includes: the crystal support, the lining plate and the clamping component; wherein

The clamping assembly is connected between the crystal support and the lining plate and provided with a clamping groove;

the lining plate is provided with a clamping part on the side opposite to the clamping groove, the shape of the clamping part is matched with the clamping groove, and the clamping part is embedded in the clamping groove.

2. A loading device as claimed in claim 1, wherein said clamping assembly comprises: the two clamping pieces are oppositely arranged and are respectively connected to the crystal support;

the clamping groove is positioned between the two clamping pieces;

the loading attachment still includes: a drive assembly;

the driving assembly is respectively connected with the two clamping pieces and drives the two clamping pieces to approach each other so that the clamping portion is clamped in the clamping groove, or to separate from each other so that the clamping portion is separated from the clamping groove.

3. The feeding device as claimed in claim 2, wherein the holding groove comprises two grooves and a containing groove communicating the two grooves;

the grooves are arranged between the clamping piece and the crystal support, and the notches of the two grooves are opposite and are respectively arranged at the two sides of the accommodating groove;

the clamping part extends to the groove from the accommodating groove.

4. The feeding device according to claim 3, wherein a clamping protrusion is further arranged on the clamping member, and the groove is formed between the clamping protrusion and the side surface of the crystal support close to the lining plate.

5. The loading device as claimed in claim 2, wherein the clamping member and the wafer support are integrally formed or detachably connected.

6. A loading device according to claim 1, wherein said gripping groove comprises: at least one of a dovetail groove and a T-shaped groove.

7. The feeding device according to claim 2, wherein a slide rail is arranged on the crystal support and along the crystal supportA first directionExtending; the first direction is perpendicular to the length direction of the silicon rod;

the clamping piece is movably arranged on the sliding rail.

8. A loading device as claimed in claim 7, wherein said drive assembly comprises: a driving rod and two sliding blocks;

the two sliding blocks are arranged on the sliding rail in a sliding mode, and each sliding block is connected with one clamping piece;

the driving rod is respectively connected with the two sliding blocks so as to drive the two clamping pieces to be close to or far away from each other through the sliding blocks.

9. The loading device according to claim 8, wherein the driving rod is provided with a first external thread section and a second external thread section respectively;

a first external thread is arranged on the first external thread section, a second external thread is arranged on the second external thread section, and the thread direction of the first external thread is opposite to that of the second external thread;

the sliding block is provided with an internal thread which can be respectively matched with the first external thread and the second external thread;

the internal thread of one of the sliding blocks is meshed with the first external thread of the first external thread section, and the internal thread of the other sliding block is meshed with the second external thread of the second external thread section.

10. A loading device as claimed in claim 8, wherein said drive assembly further comprises: a drive knob;

the drive knob is rotatably arranged on the crystal support and is fixedly connected with the drive rod.

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