CN220784093U - Abnormal shape cutting machine - Google Patents

Abstract

The utility model belongs to the technical field of sponge cutting machines, in particular to a special-shaped cutting machine which comprises a bottom plate, wherein a first chute is formed in the top wall of the bottom plate; the first sliding groove is rotationally connected with a first screw rod; the screw nut pair on the outer circular wall of the first screw rod is connected with a first sliding block; the top wall of the bottom plate is fixedly connected with a first motor, and the first motor is connected with a first screw rod through a first transmission assembly; the top wall of the first sliding block is fixedly connected with a supporting column; the top wall of the support column is fixedly connected with a support plate; clamping plates are arranged on two sides of the side wall of the supporting plate; the utility model provides a special-shaped cutting machine, which aims to solve the problems that in the prior art, as the application of sponge in daily life is wider and wider, the shape of the sponge is also thousand and strange, the special-shaped cutting machine is required to cut the sponge into various shapes, but the existing special-shaped cutting machine can only cut one finished product at a time, so that the processing efficiency is low and the production requirement cannot be completely met.

Description

Abnormal shape cutting machine

Technical Field

The utility model belongs to the technical field of sponge cutting machines, and particularly relates to a special-shaped cutting machine.

Background

Sponges, which are porous materials with good water absorption, are often used for cleaning impermeable surfaces, especially good at absorbing water and water-based solutions, and have a natural sponge and a synthetic sponge, which are initially made of natural sponge, most often synthetic materials today.

In the prior art, along with the wider and wider application of the sponge in daily life, the shape of the sponge is also thousand and strange, and the sponge is required to be cut into various shapes by using a special-shaped cutting machine, but the existing special-shaped cutting machine can only cut one finished product at a time, so that the processing efficiency is low and the production requirement cannot be completely met.

Disclosure of Invention

In order to make up the deficiency of the prior art, solve the prior art, along with the sponge in daily life being used more and more widely, the shape of the sponge is also the strange and the special-shaped cutting machine is needed to cut the sponge into various shapes, but the existing special-shaped cutting machine only can cut a finished product at a time, so the processing efficiency is not high, and the problem of the production requirement cannot be completely met.

The technical scheme adopted for solving the technical problems is as follows: the special-shaped cutting machine comprises a bottom plate, wherein a first chute is formed in the top wall of the bottom plate; the first sliding groove is rotationally connected with a first screw rod; the screw nut pair on the outer circular wall of the first screw rod is connected with a first sliding block; the top wall of the bottom plate is fixedly connected with a first motor, and the first motor is connected with a first screw rod through a first transmission assembly; the top wall of the first sliding block is fixedly connected with a supporting column; the top wall of the support column is fixedly connected with a support plate; clamping plates are arranged on two sides of the side wall of the supporting plate; the side wall of the supporting plate is rotatably connected with a first rotating handle, and the first rotating handle is connected with the clamping plate through a clamping assembly; the top wall of the bottom plate is provided with a placing plate, the periphery of the bottom wall of the placing plate is fixedly connected with the top wall of the bottom plate through a connecting plate, and the top wall of the placing plate is contacted with the bottom wall of the clamping plate; the side wall of the bottom plate is fixedly connected with an L-shaped plate; the side wall of the L-shaped plate is fixedly connected with a hydraulic push rod; the end part of the hydraulic push rod is fixedly connected with a mounting plate; the two sides of the side wall of the mounting plate are rotatably connected with rotating shafts; the side wall of the mounting plate is fixedly connected with a fixing plate; the top wall of the fixed plate is fixedly connected with a second double-shaft motor, and the second double-shaft motor is connected with the rotating shaft through a second transmission assembly; a turntable is fixedly connected to the end parts of the pair of rotating shafts; the side wall of the turntable is fixedly connected with a first connecting rod; guide rods are fixedly connected to two sides of the bottom wall of the mounting plate; the outer circular wall of the guide rod is connected with a sleeve in a sliding manner; the upper side and the lower side of the outer circular wall of the sleeve are fixedly connected with cross bars; the two sides of the top wall of the placing plate are provided with through grooves which are positioned corresponding to the guide rod; a pair of cross rod side walls are directly fixedly connected with a wire saw; the top wall of the cross rod is fixedly connected with a fixing rod; the side wall of the fixed rod is fixedly connected with a second connecting rod; and a rocker is arranged between the first connecting rod and the second connecting rod, the top end of the rocker is hinged with the first connecting rod, and the bottom end of the rocker is hinged with the outer circular wall of the second connecting rod.

Preferably, the first transmission assembly comprises a first driving sprocket, and the first driving sprocket is fixedly connected with the output end of the first motor; the side wall of the bottom plate is rotationally connected with a rotating rod, and one end of the rotating rod extends into the side wall of the bottom plate and is fixedly connected with the end part of the first screw rod; the end part of the rotating rod is fixedly connected with a first driven sprocket, and the first driven sprocket is connected with a first driving sprocket through a chain belt.

Preferably, the clamping assembly comprises a second chute; a second chute is formed in the side wall of the supporting plate; the inner side wall of the second sliding groove is rotationally connected with a bidirectional threaded rod, and one end of the bidirectional threaded rod extends out of the side wall of the supporting plate and is fixedly connected with the end part of the first rotating handle; the two sides of the outer circular wall of the bidirectional threaded rod are both in threaded connection with a second sliding block, and one side of the second sliding block is fixedly connected with the side wall of the clamping plate.

Preferably, the second transmission assembly includes a second drive sprocket; the rear output end of the second double-shaft motor is fixedly connected with a second driving sprocket; the front output end of the second double-shaft motor extends into the side wall of the mounting plate and is fixedly connected with the end part of the rotating shaft; the other end part of the rotating shaft is fixedly connected with a second driven sprocket, and the second driven sprocket is connected with a second driving sprocket through a chain belt.

Preferably, the top walls of the clamping plates are both rotatably connected with a second rotary handle; the side walls of the clamping plates are provided with lower pressing plates, and the lower pressing plates are connected with the rotating handles through lower pressing assemblies.

Preferably, the pressing component comprises a third chute, and the side walls of the pair of clamping plates are provided with the third chute; the bottom wall of the pair of third sliding grooves is rotationally connected with a second screw rod, and the top end of the second screw rod is fixedly connected with the end part of the second rotating handle; and a second screw rod outer circular wall screw rod nut pair is connected with a third sliding block, and one side of the third sliding block is fixedly connected with the side wall of the lower pressing plate.

The beneficial effects of the utility model are as follows:

1. according to the special-shaped cutting machine, the sponge to be cut is placed on the surface of the placing plate; the sponge is clamped and fixed by rotating the first rotating handle and the second rotating handle through two clamping plates on the side wall of the supporting plate driven by the clamping assembly; the first motor drives the first sliding block to horizontally move through the first transmission assembly, and the first sliding block drives the supporting plate to horizontally move through the supporting column, so that the sponge block is driven to horizontally move; the hydraulic push rod drives the mounting plate to move back and forth, so that the sponge can be subjected to special-shaped cutting; through starting the second motor, the second motor rotates and drives the pivot through second drive assembly and rotate, and the pivot rotates and drives the head rod and rotate, and the head rod rotates and drives the sleeve pipe through the rocker and reciprocate along the guide arm, and the sleeve pipe reciprocates and drives the wire saw through two horizontal poles and reciprocate to cut the sponge, through being equipped with a pair of wire saw, can realize two dysmorphism cuts simultaneously, very big improvement work efficiency.

2. According to the special-shaped cutting machine, the second rotating handle is rotated, and the lower pressing plate is driven to move downwards by the pressing component, so that the sponge is fixed in the vertical direction, and the situation that the sponge shakes due to the up-and-down movement of the wire saw during cutting, so that the cutting position is deviated is avoided.

Drawings

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a second perspective view of the present utility model;

fig. 4 is a schematic structural view of the present utility model.

In the figure: 1. a bottom plate; 2. a first chute; 3. a first screw rod; 4. a first slider; 5. a first motor; 6. a support column; 7. a support plate; 8. a clamping plate; 9. a first rotary handle; 10. placing a plate; 11. an L-shaped plate; 12. a hydraulic push rod; 13. a mounting plate; 14. a rotating shaft; 15. a fixing plate; 16. a second double-shaft motor; 17. a turntable; 18. a first connecting rod; 19. a guide rod; 20. a sleeve; 21. a cross bar; 22. a through groove; 23. wire saw; 24. a fixed rod; 25. a second connecting rod; 26. a rocker; 27. a first drive sprocket; 28. a rotating rod; 29. a first driven sprocket; 30. a second chute; 31. a two-way threaded rod; 32. a second slider; 33. a second drive sprocket; 34. a second driven sprocket; 35. a second rotary handle; 36. a lower pressing plate; 37. a third chute; 38. a second screw rod; 39. and a third slider.

Detailed Description

The utility model is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

As shown in fig. 1 to 4, the special-shaped cutting machine of the utility model comprises a bottom plate 1, wherein a first chute 2 is formed in the top wall of the bottom plate 1; the first sliding groove 2 is rotatably connected with a first screw rod 3; the outer circular wall screw nut pair of the first screw rod 3 is connected with a first sliding block 4; the top wall of the bottom plate 1 is fixedly connected with a first motor 5, and the first motor 5 is connected with a first screw rod 3 through a first transmission assembly; the top wall of the first sliding block 4 is fixedly connected with a supporting column 6; the top wall of the support column 6 is fixedly connected with a support plate 7; clamping plates 8 are arranged on two sides of the side wall of the supporting plate 7; the side wall of the supporting plate 7 is rotatably connected with a first rotating handle 9, and the first rotating handle 9 is connected with the clamping plate 8 through a clamping assembly; the top wall of the bottom plate 1 is provided with a placing plate 10, the periphery of the bottom wall of the placing plate 10 is fixedly connected with the top wall of the bottom plate 1 through a connecting plate, and the top wall of the placing plate 10 is contacted with the bottom wall of the clamping plate 8; the side wall of the bottom plate 1 is fixedly connected with an L-shaped plate 11; the side wall of the L-shaped plate 11 is fixedly connected with a hydraulic push rod 12; the end part of the hydraulic push rod 12 is fixedly connected with a mounting plate 13; the two sides of the side wall of the mounting plate 13 are rotatably connected with a rotating shaft 14; a fixed plate 15 is fixedly connected to the side wall of the mounting plate 13; the top wall of the fixed plate 15 is fixedly connected with a second double-shaft motor 16, and the second double-shaft motor 16 is connected with the rotating shaft 14 through a second transmission assembly; a turntable 17 is fixedly connected to the end parts of the pair of rotating shafts 14; the side wall of the turntable 17 is fixedly connected with a first connecting rod 18; guide rods 19 are fixedly connected to two sides of the bottom wall of the mounting plate 13; the outer circular wall of the guide rod 19 is connected with a sleeve 20 in a sliding manner; the upper side and the lower side of the outer circular wall of the sleeve 20 are fixedly connected with a cross rod 21; the two sides of the top wall of the placing plate 10 are provided with through grooves 22, and the through grooves 22 are positioned corresponding to the guide rods 19; a pair of side walls of the cross bar 21 are directly fixedly connected with a wire saw 23; a fixed rod 24 is fixedly connected to the top wall of the cross rod 21; the side wall of the fixed rod 24 is fixedly connected with a second connecting rod 25; a rocker 26 is arranged between the first connecting rod 18 and the second connecting rod 25, the top end of the rocker 26 is hinged with the first connecting rod 18, and the bottom end of the rocker 26 is hinged with the outer circular wall of the second connecting rod 25; in operation, the sponge to be cut is placed on the surface of the placement plate 10; the first rotating handle 9 is rotated, and the first rotating handle 9 drives the two clamping plates 8 on the side wall of the supporting plate 7 through the clamping assembly to clamp and fix the sponge; the first motor 5 drives the first sliding block 4 to horizontally move through the first transmission component, and the first sliding block 4 drives the supporting plate 7 to horizontally move through the supporting column 6, so that the sponge block is driven to horizontally move; the hydraulic push rod 12 drives the mounting plate 13 to move back and forth, so that the sponge can be subjected to special-shaped cutting; through starting the second motor, the second motor rotates and drives the pivot 14 through second drive assembly and rotate, and pivot 14 rotates and drives head rod 18 and rotate, and head rod 18 rotates and drives sleeve pipe 20 through rocker 26 and reciprocate along guide arm 19, and sleeve pipe 20 reciprocates and drives wire saw 23 through two horizontal poles 21 and reciprocate to cut the sponge, through being equipped with a pair of wire saw 23, can realize two dysmorphism cuts simultaneously, very big improvement work efficiency.

The first transmission assembly comprises a first driving sprocket 27, and the output end of the first motor 5 is fixedly connected with the first driving sprocket 27; the side wall of the bottom plate 1 is rotatably connected with a rotating rod 28, and one end of the rotating rod 28 extends into the side wall of the bottom plate 1 and is fixedly connected with the end part of the first screw rod 3; the end part of the rotating rod 28 is fixedly connected with a first driven sprocket 29, and the first driven sprocket 29 is connected with a first driving sprocket 27 through a chain belt; when the rotary rod driving device works, the first driving sprocket 27 at the output end of the rotary rod driving device is driven to rotate through rotation of the first motor 5, the first driven sprocket 29 is driven to rotate through rotation of the first driving sprocket 27, the rotary rod 28 is driven to rotate through rotation of the first driven sprocket 29, and the first screw rod 3 is driven to rotate through rotation of the rotary rod 28.

The clamping assembly includes a second runner 30; a second chute 30 is formed in the side wall of the supporting plate 7; the inner side wall of the second chute 30 is rotatably connected with a bidirectional threaded rod 31, and one end of the bidirectional threaded rod 31 extends out of the side wall of the supporting plate 7 and is fixedly connected with the end part of the first rotating handle 9; two sides of the outer circular wall of the bidirectional threaded rod 31 are in threaded connection with a second sliding block 32, and one side of the second sliding block 32 is fixedly connected with the side wall of the clamping plate 8; during operation, by rotating the first rotating handle 9, the first rotating handle 9 rotates to drive the bidirectional threaded rod 31 to rotate, and the bidirectional threaded rod 31 rotates to enable the two first sliding blocks 4 to move in opposite directions.

The second drive assembly includes a second drive sprocket 33; a second driving sprocket 33 is fixedly connected to the rear output end of the second double-shaft motor 16; the front output end of the second double-shaft motor 16 extends into the side wall of the mounting plate 13 and is fixedly connected with the end part of the rotating shaft 14; the other end part of the rotating shaft 14 is fixedly connected with a second driven sprocket 34, and the second driven sprocket 34 is connected with a second driving sprocket 33 through a chain belt; when the rotary table is in operation, the rotary shaft 14 at the front output end of the rotary table is driven to rotate by the rotation of the second double-shaft motor 16, the rotary shaft 14 rotates to drive the rotary table 17 to rotate, meanwhile, the second driving chain wheel 33 at the rear output end of the rotary table is driven to rotate by the rotation of the second double-shaft motor 16, the second driven chain wheel 34 is driven to rotate by the rotation of the second driving chain wheel 33 through a chain belt, the other rotary shaft 14 is driven to rotate by the rotation of the second driven chain wheel 34, and the other rotary table 17 is driven to rotate by the rotation of the rotary shaft 14.

A second rotating handle 35 is rotatably connected to the top wall of the pair of clamping plates 8; the side walls of the clamping plates 8 are provided with lower pressing plates 36, and the lower pressing plates 36 are connected with the rotating handles through a lower pressing assembly; during operation, through rotatory second pivoted handle 35, second pivoted handle 35 drives holding down plate 36 through pushing down the subassembly and moves down to carry out vertical direction's fixed to the sponge, avoid when cutting because wire saw 23 reciprocates and lead to the sponge to rock and then make the circumstances of cutting position skew.

The pressing component comprises a third chute 37, and the side walls of the pair of clamping plates 8 are provided with the third chute 37; the bottom walls of the pair of third sliding grooves 37 are rotatably connected with a second screw rod 38, and the top ends of the second screw rod 38 are fixedly connected with the end parts of the second rotary handles 35; the screw-nut pair on the outer circular wall of the second screw rod 38 is connected with a third sliding block 39, and one side of the third sliding block 39 is fixedly connected with the side wall of the lower pressing plate 36; in operation, by rotating the second rotating handle 35, the second rotating handle 35 rotates to drive the second screw rod 38 to rotate, and the second screw rod 38 rotates to enable the third sliding block 39 to move along the third sliding groove 37.

The working principle is that the sponge to be cut is placed on the surface of the placing plate 10; by rotating the first rotating handle 9, the first rotating handle 9 rotates to drive the bidirectional threaded rod 31 to rotate, and the bidirectional threaded rod 31 rotates to enable the two first sliding blocks 4 to move in opposite directions, so that the sponge is clamped and fixed; the first driving sprocket 27 at the output end of the motor is driven to rotate through the rotation of the first motor 5, the first driven sprocket 29 is driven to rotate through a chain through the rotation of the first driving sprocket 27, the rotating rod 28 is driven to rotate through the rotation of the first driven sprocket 29, the rotating rod 28 is driven to rotate through the rotation of the rotating rod 28, the first screw rod 3 is driven to rotate, the first screw rod 3 rotates to enable the first sliding block 4 to horizontally move, the supporting plate 7 is driven to horizontally move through the supporting column 6 by the first sliding block 4, and therefore the sponge block is driven to horizontally move; the hydraulic push rod 12 drives the mounting plate 13 to move back and forth, so that the sponge can be subjected to special-shaped cutting; the rotation of the second double-shaft motor 16 drives the rotation shaft 14 at the front output end of the rotary shaft 14 to rotate, the rotary shaft 14 rotates to drive the rotary disc 17 to rotate, meanwhile, the second double-shaft motor 16 rotates to drive the second driving sprocket 33 at the rear output end of the rotary shaft, the second driving sprocket 33 rotates to drive the second driven sprocket 34 to rotate through a chain belt, the second driven sprocket 34 rotates to drive the other rotary shaft 14 to rotate, the rotation shaft 14 rotates to drive the other rotary disc 17 to rotate, and the rotary disc 17 rotates to drive the first connecting rod 18 to rotate; the first connecting rod 18 rotates to drive the sleeve 20 to move up and down along the guide rod 19 through the rocker 26, the sleeve 20 moves up and down to drive the wire saw 23 to move up and down through the two cross rods 21, so that the sponge is cut, and two special-shaped cuts can be simultaneously realized through the arrangement of the pair of wire saws 23, so that the working efficiency is greatly improved; by rotating the second rotating handle 35, the second rotating handle 35 rotates to drive the second screw rod 38 to rotate, and the second screw rod 38 rotates to enable the third sliding block 39 to move along the third sliding groove 37; thereby carry out the fixed of vertical direction to the sponge, avoid when cutting because wire saw 23 reciprocates and lead to the sponge to rock and then make the circumstances of cutting position skew.

The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The special-shaped cutting machine is characterized by comprising a bottom plate (1), wherein a first chute (2) is formed in the top wall of the bottom plate (1); the first sliding groove (2) is rotationally connected with a first screw rod (3); the outer circular wall screw nut pair of the first screw rod (3) is connected with a first sliding block (4); the top wall of the bottom plate (1) is fixedly connected with a first motor (5), and the first motor (5) is connected with a first screw rod (3) through a first transmission assembly; the top wall of the first sliding block (4) is fixedly connected with a supporting column (6); a supporting plate (7) is fixedly connected to the top wall of the supporting column (6); clamping plates (8) are arranged on two sides of the side wall of the supporting plate (7); the side wall of the supporting plate (7) is rotatably connected with a first rotating handle (9), and the first rotating handle (9) is connected with the clamping plate (8) through a clamping assembly; the top wall of the bottom plate (1) is provided with a placing plate (10), the periphery of the bottom wall of the placing plate (10) is fixedly connected with the top wall of the bottom plate (1) through a connecting plate, and the top wall of the placing plate (10) is contacted with the bottom wall of the clamping plate (8); the side wall of the bottom plate (1) is fixedly connected with an L-shaped plate (11); the side wall of the L-shaped plate (11) is fixedly connected with a hydraulic push rod (12); the end part of the hydraulic push rod (12) is fixedly connected with a mounting plate (13); the two sides of the side wall of the mounting plate (13) are rotatably connected with rotating shafts (14); a fixed plate (15) is fixedly connected to the side wall of the mounting plate (13); the top wall of the fixed plate (15) is fixedly connected with a second double-shaft motor (16), and the second double-shaft motor (16) is connected with the rotating shaft (14) through a second transmission assembly; a turntable (17) is fixedly connected to the end parts of the pair of rotating shafts (14); a first connecting rod (18) is fixedly connected to the side wall of the turntable (17); guide rods (19) are fixedly connected to two sides of the bottom wall of the mounting plate (13); the outer circular wall of the guide rod (19) is connected with a sleeve (20) in a sliding manner; the upper side and the lower side of the outer circular wall of the sleeve (20) are fixedly connected with cross bars (21); the two sides of the top wall of the placing plate (10) are provided with through grooves (22), and the through grooves (22) are positioned corresponding to the guide rods (19); the side walls of the pair of cross bars (21) are directly fixedly connected with a wire saw (23); a fixed rod (24) is fixedly connected to the top wall of the cross rod (21); the side wall of the fixed rod (24) is fixedly connected with a second connecting rod (25); a rocker (26) is arranged between the first connecting rod (18) and the second connecting rod (25), the top end of the rocker (26) is hinged with the first connecting rod (18), and the bottom end of the rocker (26) is hinged with the outer circular wall of the second connecting rod (25).

2. The special-shaped cutting machine according to claim 1, wherein the first transmission assembly comprises a first driving sprocket (27), and the output end of the first motor (5) is fixedly connected with the first driving sprocket (27); the side wall of the bottom plate (1) is rotationally connected with a rotating rod (28), and one end of the rotating rod (28) extends into the side wall of the bottom plate (1) to be fixedly connected with the end part of the first screw rod (3); the end part of the rotating rod (28) is fixedly connected with a first driven sprocket (29), and the first driven sprocket (29) is connected with a first driving sprocket (27) through a chain belt.

3. A profile cutting machine according to claim 2, wherein the clamping assembly comprises a second chute (30); a second chute (30) is formed in the side wall of the supporting plate (7); the inner side wall of the second sliding groove (30) is rotationally connected with a bidirectional threaded rod (31), and one end of the bidirectional threaded rod (31) extends out of the side wall of the supporting plate (7) to be fixedly connected with the end part of the first rotating handle (9); two sides of the outer circular wall of the bidirectional threaded rod (31) are connected with second sliding blocks (32) in a threaded mode, and one side of each second sliding block (32) is fixedly connected with the side wall of the clamping plate (8).

4. A profile cutter according to claim 3, wherein the second transmission assembly comprises a second drive sprocket (33); the rear output end of the second double-shaft motor (16) is fixedly connected with a second driving sprocket (33); the front output end of the second double-shaft motor (16) extends into the side wall of the mounting plate (13) and is fixedly connected with the end part of the rotating shaft (14); the other end part of the rotating shaft (14) is fixedly connected with a second driven sprocket (34), and the second driven sprocket (34) is connected with a second driving sprocket (33) through a chain belt.

5. A profile cutting machine according to claim 4, wherein the top walls of a pair of said clamping plates (8) are each rotatably connected to a second rotary handle (35); the side walls of the clamping plates (8) are provided with lower pressing plates (36), and the lower pressing plates (36) are connected with the rotating handles through lower pressing assemblies.

6. A profile cutting machine according to claim 5, wherein the hold-down assembly comprises a third runner (37), the third runners (37) being provided on the side walls of a pair of clamping plates (8); the bottom walls of the pair of third sliding grooves (37) are rotatably connected with a second screw rod (38), and the top ends of the second screw rods (38) are fixedly connected with the end parts of the second rotary handles (35); the second screw rod (38) is connected with a third sliding block (39) through an outer circular wall screw rod nut pair, and one side of the third sliding block (39) is fixedly connected with the side wall of the lower pressing plate (36).