CN221818997U - Ceramic cup apparatus for producing - Google Patents

Abstract

The utility model relates to the technical field of ceramic cup production devices, and belongs to a ceramic cup production device, which comprises: the support table is rotatably provided with a turntable, a plurality of molds are arranged on the turntable, a first sliding plate is arranged in the molds in a sliding manner, and blanks are placed on the first sliding plate; a feeding mechanism is arranged on the supporting table and is matched with the die in a feeding manner; a stamping structure is arranged on the supporting table and is used for stamping and forming the blank in the die; a drying component is arranged on the supporting table; the support table is provided with a driving mechanism, the bottom end of the first sliding plate is fixedly provided with a first sliding rod, and the first sliding rod penetrates through the support table to be in transmission fit with the driving mechanism; the driving mechanism is connected with the stamping mechanism through a linkage assembly. When the stamping mechanism moves to stamp the cup, the stamping mechanism drives the driving mechanism to move upwards relative to the first sliding plate in the die through the linkage assembly, so that the cup formed by the stamping mechanism is demoulded, the cost is saved, and the production efficiency is further improved.

Description

Ceramic cup production device

Technical Field

The utility model belongs to the technical field of ceramic cup production devices and relates to a ceramic cup production device.

Background Art

"Ceramics" are made of clay into a shape. They are made of clay or other inorganic non-metallic raw materials, and are processed by molding, sintering and other processes. They are plate-shaped or block-shaped ceramic products used to decorate and protect the walls and floors of buildings. After drying, they are heated to a certain degree to harden them and no longer dissolve in water. The main components of ceramic cups are kaolin, clay, porcelain stone, porcelain clay, colorants, blue and white materials, lime glaze, lime alkali glaze, etc. The molding is achieved by rotating and pressing the molding head to squeeze the blank with the mold.

The prior art is that the patent application document CN216578420U discloses a molding device for ceramic cup production, including a base plate, a fixed seat is provided on the top of the base plate, a molding barrel and a cleaning barrel are fixedly connected to the top of the fixed seat in sequence, the molding barrel is rotatably connected to a rotating seat inside, a slider is symmetrically slidably connected to the top of the rotating seat, a clamping block is fixedly connected to the top of the slider, a mold is provided on the top of the rotating seat, a transmission shaft is rotatably connected to the cleaning barrel inside, a cleaning rod is fixedly connected to one end of the transmission shaft, and a cleaning brush is equidistantly provided on one side of the cleaning rod; the problem with this device is that after the blank is extruded and molded by the mold, manual demolding or a separate power source is required for demolding, and since the molded product is not easy to be removed from the mold, it is time-consuming and labor-intensive, which increases labor and time costs, increases the difficulty of production, and reduces production efficiency.

The prior art is a ceramic cup production equipment disclosed in the patent application document of CN217943691U, including a support frame, a first motor is arranged at the bottom of the support frame, a driving gear is installed at the output end of the first motor, a first rotating shaft is arranged on the surface of the support frame, a driven gear and a rotating plate are fixedly installed on the surface of the first rotating shaft, a lower mold is arranged on the surface of the rotating plate, a telescopic device is arranged at the bottom of the rotating plate, a push plate is fixedly connected to one end of the telescopic device, and a material box is arranged on the surface of the support frame. The raw material enters the material box through the feed port on the surface of the material box, and the raw material is introduced into the lower mold through the material guide pipe, so as to automatically guide the material inside the lower mold, and the telescopic device is arranged at the bottom of the lower mold, and the device demoulds the ceramic cup through the telescopic device. The problem in the device is that the molding and demoulding of the ceramic cup are realized respectively by two power sources, and there is a telescopic device under each mold for demoulding, which is costly.

In order to solve the above problems, the utility model proposes a ceramic cup production device.

Utility Model Content

In order to solve the problems existing in the background technology, the utility model proposes a ceramic cup production device.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a ceramic cup production device, comprising: a support table, a turntable is rotatably arranged on the support table, a plurality of molds are installed on the turntable, a first slide is slidably arranged in the mold, and the blank is placed on the first slide; a feeding mechanism is arranged on the support table, and the feeding mechanism cooperates with the mold to convey the material; a stamping structure is installed on the support table, and the stamping structure stamps the blank in the mold; a drying component is arranged on the support table; a driving mechanism is arranged on the support table, a first slide bar is fixedly arranged at the bottom end of the first slide bar, and the first slide bar passes through the support table and cooperates with the driving mechanism for transmission; the driving mechanism and the stamping mechanism are connected through a linkage component.

Furthermore, the stamping mechanism is a pressing block, a first slider is slidably installed on the support platform, the pressing block is fixedly arranged at the bottom end of the first slider, and the pressing block is adapted to the mold; the linkage component is arranged on the first slider, and the first slider is transmitted and matched with the driving mechanism through the linkage component.

Furthermore, the driving mechanism includes a rotating rod, which is rotatably arranged at the bottom and abuts against the first sliding rod; a fixed frame is fixedly arranged at the bottom end of the support platform, and a second slide plate is slidably arranged in the fixed frame, and the second slide plate is connected to the fixed frame through a second spring; the second slide plate cooperates with the rotating rod; the second slide plate is transmitted and cooperated with the first sliding block through a linkage assembly.

Furthermore, the linkage assembly is a push rod, which is fixedly arranged on the first sliding block, and passes through the support platform to abut against the second sliding block.

Furthermore, a first gear is rotatably arranged on the support platform, a gear ring is fixedly arranged on the outer circumferential surface of the turntable, and the first gear is meshed with the gear ring; a third motor is fixedly installed on the bottom end of the support platform, and the output end of the third motor is coaxially fixedly connected with the first gear.

Furthermore, the drying component includes a drying rod, a second supporting frame is fixedly arranged on the upper end of the supporting platform, a second slider is slidably installed on the second supporting frame, the drying rod is fixedly arranged on the second slider, and the drying rod is adapted to the mold.

Furthermore, the feeding mechanism includes a material storage box, which is fixedly installed on the support platform. The material storage box is fixedly connected to a discharge pipe, and one end of the discharge pipe is located above the mold.

Furthermore, the driving mechanism includes a second slide rod, a first fixed plate and a second fixed plate are fixedly arranged at the bottom end of the support platform, a second slide rod is slidably connected between the first fixed plate and the second fixed plate, a fixed block is fixedly arranged on the second slide rod, and the fixed block is abutted and cooperated with the first slide rod; the second slide rod is transmitted and cooperated with the stamping mechanism through a linkage assembly.

Furthermore, the linkage assembly includes a first rack, a second gear, and a second rack. The second rack is fixedly arranged at the bottom end of the first sliding block. A second through hole is opened on the support platform, and the second rack corresponds to the second through hole; the second gear is rotatably arranged on the first fixed plate, and the second gear is meshed with the second rack; the first rack is fixedly arranged on the second sliding rod, and the first rack is meshed with the second gear.

Compared with the prior art, the utility model has the following beneficial effects: the mold is continuously fed by the feeding mechanism; the first gear is meshed with the gear ring to make the turntable rotate with the mold, and when it rotates to the corresponding position, the blank in the mold is stamped and formed by the stamping mechanism; when the stamping mechanism moves to stamp it, the stamping mechanism drives the driving mechanism to drive the first slide plate in the mold opposite to it to move upward through the linkage component, and the molded and dried cup is demolded, which saves costs and improves work efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of Example 1 of the present utility model;

FIG2 is a cross-sectional view of the internal structure of Example 1 of the present utility model;

Fig. 3 is an enlarged view of point A in Fig. 2 of the present utility model;

FIG4 is an enlarged view of point B in FIG2 of the present utility model;

FIG5 is a bottom view of Example 1 of the present utility model;

FIG6 is a cross-sectional view of the structure of Example 1 of the present utility model;

FIG7 is a schematic diagram of the overall structure of Example 2 of the present utility model;

FIG8 is a cross-sectional view of the structure of Example 2 of the present utility model.

In the figure: 1, support platform; 2, first support frame; 3, second support frame; 4, third support frame; 5, first motor; 6, second motor; 7, first slide block; 8, material storage box; 9, discharge pipe; 10, mold; 11, fixed ring; 12, gear ring; 13, first gear; 14, turntable; 15, pressing block; 16, screw rod; 17, support leg; 18, push rod; 19, first slide rod; 20, rotating rod; 21, fixed frame; 22, fixed shaft; 23 , the first spring; 24, the first slide; 25, the second spring; 26, the fixed seat; 27, the second slide; 28, the drying rod; 29, the third motor; 30, the first through hole; 31, the first fixed plate; 32, the rotating shaft; 33, the first rack; 34, the first slide groove; 35, the second slide rod; 36, the second gear; 37, the second through hole; 38, the second rack; 39, the second fixed plate; 40, the second slide groove; 41, the second slider; 42, the fixed block.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Example 1

As shown in Fig. 1 to Fig. 6, the technical solution adopted by the utility model is as follows: A ceramic cup production device includes a support table 1. A plurality of support legs 17 are fixedly welded to the bottom end of the support table 1, and the support legs 17 play a supporting role for the whole. A circular through hole is opened on the support table 1, and a turntable 14 is rotatably installed in the circular through hole. Four molds 10 are fixedly arranged on the turntable 14. The four molds 10 are distributed in a circular array.

A third support frame 4 is fixedly arranged on the support platform 1, and a stamping mechanism is arranged on the third support frame 4. The stamping mechanism stamps the blank in the mold 10. A driving mechanism is arranged at the bottom of the support platform 1, and a first slide plate 24 is slidably arranged in each mold 10. A first slide bar 19 is fixedly arranged at the bottom of the first slide plate 24, and the first slide bar 19 passes through the support platform 1 and extends to the bottom of the support platform 1 to cooperate with the driving mechanism in transmission, so that the first slide plate 24 moves up and demolds the molded cup. The first slide bar 19 is slidably connected to the support platform 1. The driving mechanism cooperates with the stamping mechanism in transmission through a linkage component.

The first slide bar 19 is composed of a vertical bar and a circular disc. The vertical bar is fixedly arranged at the bottom end of the first slide plate 24, and the vertical bar extends through the support platform 1 to the bottom of the support platform 1 and is fixedly connected to the circular disc. The part of the vertical bar below the support platform 1 is sleeved with a first spring 23. One end of the first spring 23 is fixedly connected to the circular disc, and the other end of the first spring 23 is fixedly connected to the bottom surface of the rotating disk 14. The first spring 23 is arranged to facilitate the first slide bar 19 to return to its original position.

A first support frame 2 is welded to one side of the upper end of the support platform 1. A feeding mechanism is provided on the first support frame 2, and the feeding mechanism cooperates with the mold 10 to convey the material. The feeding mechanism includes a storage box 8. The storage box 8 is fixedly mounted on the upper end of the first support frame 2. A feed port is provided at the upper end of the storage box 8. A discharge pipe 9 is fixedly connected to the side of the storage box 8 facing the mold 10, and the other end of the discharge pipe 9 is located directly above the mold 10, so as to facilitate the conveying of the blank to the mold 10.

The punching mechanism includes a pressing block 15. A first groove is provided in the second support frame 3, and the notch of the first groove faces the mold 10. A first slider 7 is provided in the first groove for limited sliding. The pressing block 15 is fixedly provided at the bottom end of the first slider 7. The pressing block 15 is adapted to the mold 10.

The driving mechanism includes a rotating rod 20. As shown in FIG6 , two fixed seats 26 are symmetrically fixedly arranged at the bottom end of the support table 1. A fixed shaft 22 is fixedly connected between the two fixed seats 26. The axis of the fixed shaft 22 is horizontally arranged front and back. The rotating rod 20 is rotatably arranged on the fixed shaft 22. The rotating rod 20 and the fixed shaft 22 are connected by a torsion spring. The rotating rod 20 is abutted and matched with the first sliding rod 19. The rotating rod 20 is directly below the pressing block 15, and the rotating rod 20 is horizontally arranged left and right. The length of the rotating rod 20 is greater than the distance between the two relative molds 10.

Two fixing frames 21 are symmetrically fixed on one side of the pressing block 15 at the bottom of the support platform 1. The fixing frames 21 are hollow inside. A second slide plate 27 is slidably connected between the two fixing frames 21. The second slide plate 27 is located below the third support frame 4. The second slide plate 27 is connected to the fixing frame 21 through a second spring 25. The second slide plate 27 is in abutment with one end of the rotating rod 20 close to the third support frame 4. The second slide plate 27 is in transmission cooperation with the stamping mechanism through a linkage assembly.

The linkage component is a push rod 18. There are two push rods 18, and the two push rods 18 are fixedly arranged on both sides of the bottom end of the first slider 7. The third support frame 4 and the support platform 1 are both provided with a first through hole 30. The first through hole 30 on the third support frame 4 corresponds to the first through hole 30 on the support platform 1. The push rod 18 extends through the first through hole 30 to the bottom of the support platform 1. The push rod 18 abuts against the second slide plate 27. The second slide plate 27 abuts against the rotating rod 20 to rotate the rotating rod 20.

A second support frame 3 is welded on the support platform 1, and a drying component is arranged on the second support frame 3, and the drying component dries the cups after stamping. The drying component includes a drying rod 28. A second groove is provided on the second support frame 3, and a second slider 41 is slidably arranged in the second groove, and the drying rod 28 is fixedly arranged at the bottom end of the second slider 41. The drying rod 28 is adapted to the mold 10. The drying rod 28 includes a shell and a heating wire, and the heating wire is installed inside the shell, and the shell is fixedly installed on the second slider 41, and a plurality of heat conduction holes are evenly arranged on the shell. The drying rod 28 is used to dry the cups after stamping.

Screw rods 16 are rotatably arranged in the first groove and the second groove, and the axis of the screw rods 16 is arranged vertically. One of the screw rods 16 is threadedly connected to the first slider 7, and the other screw rod 16 is threadedly connected to the second slider 41. The first motor 5 is fixedly installed on the third support frame 4, and the output end of the first motor 5 passes through the third support frame 4 and is coaxially fixedly connected to the screw rod 16 in the first groove. The second motor 6 is fixedly installed on the second support frame 3, and the output end of the second motor 6 passes through the second support frame 3 and is coaxially fixedly connected to the screw rod 16 in the second groove.

A first gear 13 is rotatably mounted on the support platform 1. A fixed ring 11 is fixedly mounted on the turntable 14. A toothed ring 12 is fixedly sleeved on the outer circumference of the fixed ring 11. The first gear 13 is meshed with the toothed ring 12 so that the toothed ring 12 rotates with the turntable 14. A third motor 29 is fixedly mounted on the bottom end of the support platform 1. The output end of the third motor 29 passes through the support platform 1 and is coaxially fixedly connected to the first gear 13.

In summary, in the initial state, one of the molds 10 is directly below the end of the discharge pipe 9 away from the storage box 8, one of the molds 10 is directly below the pressing block 15, and one of the molds 10 is directly below the drying rod 28. The rotating rod 20 is in a horizontal state. The top rod 18 is in the first groove.

The blank is conveyed into the storage box 8 through the feed port. The blank in the storage box 8 enters the mold 10 below through the discharge pipe 9. The third motor 29 is started, and the third motor 29 rotates the first gear 13, and the first gear 13 rotates the gear ring 12, and the gear ring 12 rotates the turntable 14 through the fixed ring 11, and the turntable 14 rotates with the mold 10, and the turntable 14 rotates 90 degrees, so that the mold 10 filled with blanks rotates to the right below the pressing block 15. The third motor 29 stops. At this time, the pressing block 15 is coaxial with the mold 10 below the pressing block 15. The feeding mechanism continues to feed the mold 10 below the feeding mechanism.

The second motor 6 and the first motor 5 are started at the same time. The first motor 5 rotates the screw rod 16 in the first groove, and the screw rod 16 moves the first slider 7 downward, and the first slider 7 moves downward with the pressing block 15 and the ejector rod 18. The pressing block 15 moves downward and contacts the blank in the mold 10 directly below the pressing block 15, and punches the blank in the mold 10.

The second motor 6 rotates the screw rod 16 in the second groove, and the screw rod 16 moves the second slider 41 downward, and the second slider 41 moves downward with the drying rod 28, and the drying rod 28 contacts the cups directly below the drying rod 28, and the second motor 6 stops. The drying rod 28 dries the cups after stamping.

During the process of the first slider 7 moving downward with the push rod 18, the push rod 18 first moves downward through the first through hole 30. When the pressing block 15 moves to the top surface of the mold 10, the push rod 18 moves down to the second slide plate 27 and contacts the second slide plate 27, causing the second slide plate 27 to move downward, and the second spring 25 is compressed. The second slide plate 27 abuts against the rotating rod 20, causing the end of the rotating rod 20 away from the pressing block 15 to rotate upward, until the rotating rod 20 abuts against the first slide bar 19, causing the first slide bar 19 to move upward with the first slide bar 24. The first slide bar 19 moves upward, and the first spring 23 is compressed. The first slide plate 24 drives the cup that has been stamped and dried to move out of the mold 10.

After the blank in the mold 10 below the stamping mechanism is formed, the cup in the mold 10 opposite to the mold 10 below the stamping mechanism is demoulded. The first motor 5 is reversed, and the first motor 5 moves the first slider 7 with the pressing block 15 and the push rod 18 upward through the screw rod 16, and returns to the initial state, and the first motor 5 stops. The push rod 18 is separated from the second slide plate 27, and the second slide plate 27 returns to the initial state under the action of the second spring 25. The second slide plate 27 is separated from the rotating rod 20, and the rotating rod 20 returns to the initial state under the action of the torsion spring.

Example 2

As shown in Fig. 7-Fig. 8, a ceramic cup production device is described here only in terms of the differences from Embodiment 1, and the other identical parts are not described in detail here. The difference between this embodiment and Embodiment 1 is that the driving mechanism for moving the first slide plate 24 up and down is different.

As shown in FIG8 , the driving mechanism includes a second slide bar 35. A first fixed plate 31 and a second fixed plate 39 are fixedly provided at the bottom end of the support platform 1, and the first fixed plate 31 and the second fixed plate 39 are symmetrically arranged. A second slide bar 35 is slidably connected between the first fixed plate 31 and the second fixed plate 39. A first slide groove 34 is provided on the first fixed plate 31, and a second slide groove 40 is provided on the second fixed plate 39. The first slide groove 34 and the second slide groove 40 are both arranged vertically. One end of the second slide bar 35 is slidably matched with the first slide groove 34, and the other end of the second slide bar 35 is slidably matched with the second slide groove 40. A fixed block 42 is fixedly provided on one side of the second slide bar 35, and the fixed block 42 is located below the mold 10 arranged opposite to the mold 10 below the pressing block 15, and the fixed block 42 is abutted and matched with the first slide bar 19. The second slide bar 35 is transmission-matched with the stamping mechanism through a linkage assembly.

The linkage assembly includes a first rack 33, a second gear 36, and a second rack 38. A rotating shaft 32 is rotatably provided on the first fixed plate 31, and the second gear 36 is fixedly sleeved on the rotating shaft 32. The second rack 38 is fixedly provided at the bottom end of the first slider 7. The second gear 36 is meshed with the second rack 38. A second through hole 37 is provided on the third support frame 4 and the support platform 1, and the second through hole 37 on the third support frame 4 corresponds to the second through hole 37 on the support platform 1, so that the second rack 38 passes through the support platform 1 and meshes with the second gear 36. The first rack 33 is fixedly provided on the second slide rod 35, and the first rack 33 is meshed with the second gear 36. The first rack 33 and the second rack 38 are respectively provided on both sides of the second gear 36.

In summary, in the initial state, the second rack 38 and the second gear 36 are in a disengaged state.

When the first slider 7 moves downward with the pressing block 15, it also moves with the second rack 38. The second rack 38 passes through the second through hole 37 and meshes with the second gear 36 to rotate the second gear 36. The second gear 36 moves the first rack 33 upward. The first rack 33 moves the fixed block 42 upward through the second slide bar 35. The fixed block 42 abuts against the first slide bar 19 to move the first slide bar 19 upward. The first slide bar 19 moves the first slide plate 24 upward. The first slide plate 24 moves the stamped cup upward, so that the formed and dried cup moves up and down, thereby achieving the demoulding effect.

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A ceramic cup manufacturing apparatus, comprising: the support table (1), the rotary table (14) is rotatably arranged on the support table (1), a plurality of dies (10) are arranged on the rotary table (14), a first sliding plate (24) is arranged in the dies (10) in a sliding manner, and blanks are placed on the first sliding plate (24); a feeding mechanism is arranged on the supporting table (1) and matched with the conveying material of the die (10); a stamping structure is arranged on the supporting table (1) and is used for stamping and forming blanks in the die (10); a drying component is arranged on the supporting table (1); a driving mechanism is arranged on the supporting table (1), a first sliding rod (19) is fixedly arranged at the bottom end of the first sliding plate (24), and the first sliding rod (19) penetrates through the supporting table (1) to be matched with the driving mechanism in a transmission way; the driving mechanism is connected with the stamping mechanism through a linkage assembly.

2. A ceramic cup manufacturing apparatus as defined in claim 1, wherein: the stamping mechanism is a pressing block (15), a first sliding block (7) is slidably arranged on the supporting table (1), the pressing block (15) is fixedly arranged at the bottom end of the first sliding block (7), and the pressing block (15) is matched with the die (10); the linkage assembly is arranged on the first sliding block (7), and the first sliding block (7) is in transmission fit with the driving mechanism through the linkage assembly.

3. A ceramic cup manufacturing apparatus as defined in claim 2, wherein: the driving mechanism comprises a rotating rod (20), the rotating rod (20) is rotatably arranged below the supporting table (1), and the rotating rod (20) is in abutting fit with the first sliding rod (19); the bottom end of the supporting table (1) is fixedly provided with a fixing frame (21), a second sliding plate (27) is arranged in the fixing frame (21) in a sliding mode, and the second sliding plate (27) is connected with the fixing frame (21) through a second spring (25); the second sliding plate (27) is matched with the rotating rod (20); the second sliding plate (27) is in transmission fit with the first sliding block (7) through a linkage assembly.

4. A ceramic cup manufacturing apparatus as defined in claim 3, wherein: the linkage assembly is a push rod (18), the push rod (18) is fixedly arranged on the first sliding block (7), and the push rod (18) passes through the supporting table (1) to be in butt fit with the second sliding plate (27).

5. A ceramic cup manufacturing apparatus as defined in claim 1, wherein: a first gear (13) is rotatably arranged on the supporting table (1), a toothed ring (12) is fixedly arranged on the outer circumferential surface of the turntable (14), and the first gear (13) is meshed and matched with the toothed ring (12); the bottom end of the supporting table (1) is fixedly provided with a third motor (29), and the output end of the third motor (29) is fixedly connected with the first gear (13) in a coaxial way.

6. A ceramic cup manufacturing apparatus as defined in claim 1, wherein: the drying assembly comprises a drying rod (28), a second supporting frame (3) is fixedly arranged at the upper end of the supporting table (1), a second sliding block (41) is slidably arranged on the second supporting frame (3), the drying rod (28) is fixedly arranged on the second sliding block (41), and the drying rod (28) is matched with the die (10).

7. A ceramic cup manufacturing apparatus as defined in claim 1, wherein: the feeding mechanism comprises a storage box (8), the storage box (8) is fixedly arranged on the supporting table (1), a discharging pipe (9) is fixedly communicated with the storage box (8), and one end of the discharging pipe (9) is positioned above the die (10).

8. A ceramic cup manufacturing apparatus as defined in claim 2, wherein: the driving mechanism comprises a second slide bar (35), a first fixing plate (31) and a second fixing plate (39) are fixedly arranged at the bottom end of the supporting table (1), the second slide bar (35) is connected between the first fixing plate (31) and the second fixing plate (39) in a sliding manner, a fixing block (42) is fixedly arranged on the second slide bar (35), and the fixing block (42) is in butt fit with the first slide bar (19); the second slide bar (35) is in transmission fit with the stamping mechanism through a linkage assembly.

9. A ceramic cup manufacturing apparatus as defined in claim 8, wherein: the linkage assembly comprises a first rack (33), a second gear (36) and a second rack (38), the second rack (38) is fixedly arranged at the bottom end of the first sliding block (7), a second through hole (37) is formed in the supporting table (1), and the second rack (38) corresponds to the second through hole (37); the second gear (36) is rotatably arranged on the first fixed plate (31), and the second gear (36) is meshed with the second rack (38); the first rack (33) is fixedly arranged on the second slide bar (35), and the first rack (33) is meshed with the second gear (36).