CN217318336U

CN217318336U - PVB guillootine

Info

Publication number: CN217318336U
Application number: CN202220279325.8U
Authority: CN
Inventors: 邱国英; 张哲�; 张翼飞; 祖芳楠; 李树旗
Original assignee: Shenzhen Jiasheng Funeng Technology Co ltd
Current assignee: Shenzhen Jiasheng Funeng Technology Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-08-30
Anticipated expiration: 2032-02-11

Abstract

The utility model relates to the technical field of mechanical equipment, in particular to a PVB cutting machine, which comprises a supporting component, wherein the top of the supporting component is rotationally connected with a transverse moving component, one side of the transverse moving component is in transmission connection with a power component, the top of the transverse moving component is fixedly provided with a longitudinal moving component, and the middle part of the longitudinal moving component is in sliding connection with a stamping component; the stamping component comprises a sliding block, the middle of the sliding block is connected with the longitudinal moving component in a sliding mode, the bottom of the sliding block is fixedly connected with a connecting block, the bottom of the connecting block is connected with a stamping seat in a sliding mode, a telescopic portion and a material pushing portion are arranged between the stamping seat and the connecting block, two stamping heads which are arranged in a centrosymmetric mode can be detachably connected to the bottom of the stamping seat, and the stamping heads are of an L-shaped structure. The utility model discloses can reach and replace the manual work to cut into the purpose of L type structure with the PVB material.

Description

PVB guillootine

Technical Field

The utility model relates to the technical field of mechanical equipment, especially, relate to a PVB guillootine.

Background

The photovoltaic panel generally comprises two pieces of toughened glass and a power generation assembly between the two pieces of toughened glass, wherein a sealing material between the two pieces of toughened glass is generally made of PVB material which is totally called polyvinyl butyral, the PVB has excellent transparency, good solubility and good light resistance, water resistance, heat resistance, cold resistance and film forming property, and is widely applied to the field of adhesives, particularly in the production flow of the photovoltaic panel, the whole PVB material is cut into a long strip shape by an operator by using tools such as a steel ruler wall paper knife and the like, is placed between the two pieces of toughened glass, and is melted after high-temperature treatment, the two pieces of toughened glass are bonded together, the four corners of the toughened glass are butted by the strip PVB material, gaps are generated at the four corners of the toughened glass due to the fact that the PVB material is suddenly contracted along the length direction after being heated, and the technical problem that the gaps are generated at the four corners of the toughened glass needs to be cut into L shapes and placed at the four corners of the toughened glass, cutting by manpower is time-consuming and labor-consuming, and therefore a PVB cutting machine is urgently needed to solve the problem.

Disclosure of Invention

The utility model aims at providing a PVB guillootine to solve above-mentioned problem, reach and replace the manual work to cut into the purpose of L type structure with the PVB material.

In order to achieve the above object, the utility model provides a following scheme: a PVB cutting machine comprises a supporting assembly, wherein the top of the supporting assembly is rotatably connected with a transverse moving assembly, one side of the transverse moving assembly is connected with a power assembly in a transmission manner, a longitudinal moving assembly is fixedly installed at the top of the transverse moving assembly, and the middle of the longitudinal moving assembly is connected with a stamping assembly in a sliding manner;

the punching press subassembly includes the slider, the slider middle part with longitudinal movement subassembly sliding connection, slider bottom rigid coupling has the connecting block, connecting block bottom sliding connection has the punching press seat, the punching press seat with be equipped with the pars contractilis between the connecting block and push away material portion, punching press seat bottom can be dismantled and be connected with two punching press heads that centrosymmetry set up, the punching press head is L type structure.

Preferably, the telescopic part comprises two symmetrically arranged cylinders, the top of each cylinder is fixedly connected with the bottom of the connecting block, and the bottom of each cylinder is fixedly connected with the top of the stamping seat.

Preferably, the pushing part comprises a plurality of push rods, the tops of the push rods are fixedly connected with the bottoms of the connecting blocks, the bottoms of the push rods are slidably connected with the stamping seat, the bottom ends of the push rods are located inside the stamping head, and the bottom ends of the push rods do not exceed the bottom ends of the stamping head.

Preferably, the bottom of the connecting block is fixedly connected with at least two third guide rails, the third guide rails are vertically arranged, the tops of the third guide rails are fixedly connected with the connecting block, and the outer walls of the third guide rails are slidably connected with the stamping seat.

Preferably, the supporting component comprises a base, two side edges of the top of the base are respectively fixedly connected with a first side plate and a second side plate, the first side plate and the second side plate are parallel to each other, a base plate is fixedly connected to the middle of the top of the base, and the two side edges of the first side plate and the two side edges of the second side plate are rotatably connected with the transverse moving component.

Preferably, the transverse moving assembly comprises a first lead screw and a second lead screw which are arranged in parallel, two ends of the first lead screw are respectively rotatably connected with the edges of the first side plate and the second side plate, two ends of the second lead screw are respectively rotatably connected with the edges of the first side plate and the second side plate on the other side, a sliding plate is in threaded connection with the middle parts of the first lead screw and the second lead screw together, a longitudinal moving assembly is fixedly mounted at the top of the sliding plate, and the power assembly is in transmission connection with the edges of the first lead screw and the second lead screw on the same side.

Preferably, power component includes the motor, the motor bottom with base top surface rigid coupling, motor output shaft rigid coupling has the pinion, first lead screw one end rigid coupling has first synchronizing wheel, second lead screw one end rigid coupling has the second synchronizing wheel, first synchronizing wheel with the second synchronizing wheel is located the homonymy, first synchronizing wheel with the hold-in range has been cup jointed to the second synchronizing wheel outer wall, the second lead screw is close to motor one end rigid coupling has the gear wheel, the gear wheel with the pinion meshing is connected.

Preferably, the longitudinal moving assembly comprises a first vertical plate and a second vertical plate which are symmetrically arranged, the bottoms of the first vertical plate and the second vertical plate are fixedly connected with the two side edges of the sliding plate, a lead screw motor is fixedly connected to one side, away from the first vertical plate, of the second vertical plate, the lead screw motor penetrates through the middle of the first vertical plate, the shaft end of the lead screw motor is rotatably connected with the middle of the second vertical plate, the lead screw motor is in threaded connection with the middle of the sliding block, the two side edges of the first vertical plate and the two side edges of the second vertical plate are respectively fixedly connected with the end portions of a first guide rail and a second guide rail, the first guide rail and the second guide rail are arranged in parallel, the first guide rail and the second guide rail are located on the two sides of the lead screw motor, and the first guide rail and the second guide rail are slidably connected with the middle of the sliding block.

Preferably, a threaded hole is formed in the middle of the sliding block, the threaded hole is in threaded connection with the lead screw motor, symmetrically-arranged sliding grooves are formed in the middle of the sliding block, the two sliding grooves are located on two sides of the threaded hole, and the two sliding grooves are in sliding connection with the first guide rail and the second guide rail respectively.

The utility model discloses has following technological effect: the support component is used for supporting the transverse moving component, the transverse moving component and the longitudinal moving component are matched with each other to drive the stamping component to move transversely and longitudinally, stamping of different parts of the whole PVB material is achieved, and the power component provides power for the transverse moving component; the punching press subassembly is used for punching press PVB material, the slider is used for being connected with the longitudinal movement subassembly, the pars contractilis can drive punching press seat relative to connecting block up-and-down motion, accomplish the punching press action, it is used for releasing the first outside of punching press with stamping forming's PVB material to push away material portion, the mounting groove has been seted up to punching press seat bottom, the punching press head is installed in the mounting groove, the punching press head is L type structure, can punch out the L type PVB strip that meets the requirements, two punching press heads are centrosymmetric setting, a punching press can form two L type PVB strips, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of another perspective structure of the present invention;

FIG. 3 is a schematic structural view of the stamping assembly of the present invention;

fig. 4 is a bottom view of the punch assembly of the present invention;

FIG. 5 is a schematic view of the structure of the punching seat of the present invention;

FIG. 6 is a schematic view of a stamping head structure according to the present invention;

wherein, 1, a base; 2. a first side plate; 3. a second side plate; 4. a base plate; 5. a motor; 6. a bull gear; 7. a synchronous belt; 8. a first synchronizing wheel; 9. a first lead screw; 10. a second lead screw; 11. a sliding plate; 12. a first vertical plate; 13. a second vertical plate; 14. a screw motor; 15. a first guide rail; 16. a second guide rail; 17. a stamping assembly; 18. a pinion gear; 19. a second synchronizing wheel; 1701. connecting blocks; 1702. a slider; 1703. a chute; 1704. a threaded hole; 1705. a third guide rail; 1706. a push rod; 1707. punching a head; 1708. punching a seat; 1709. mounting grooves; 1710. and a cylinder.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 6, the present embodiment provides a PVB cutting machine, which includes a supporting component, a transverse moving component is rotatably connected to a top of the supporting component, a power component is connected to one side of the transverse moving component in a transmission manner, a longitudinal moving component is fixedly installed on a top of the transverse moving component, and a stamping component 17 is slidably connected to a middle portion of the longitudinal moving component;

the stamping assembly 17 comprises a slider 1702, the middle of the slider 1702 is in sliding connection with the longitudinal moving assembly, the bottom of the slider 1702 is fixedly connected with a connecting block 1701, the bottom of the connecting block 1701 is in sliding connection with a stamping seat 1708, a telescopic part and a pushing part are arranged between the stamping seat 1708 and the connecting block 1701, the bottom of the stamping seat 1708 is detachably connected with two stamping heads 1707 which are arranged in central symmetry, and the stamping heads 1707 are in an L-shaped structure.

The support component is used for supporting the transverse moving component, the transverse moving component and the longitudinal moving component are matched with each other to drive the stamping component 17 to carry out transverse and longitudinal movement, stamping on different parts of the whole PVB material is realized, and the power component provides power for the transverse moving component; punching press subassembly 17 is used for punching press PVB material, slider 1702 is used for being connected with the longitudinal movement subassembly, the pars contractilis can drive punching press seat 1708 and for connecting block 1701 up-and-down motion, accomplish the punching press action, it is used for pushing out punching press first 1707 outside with stamping forming's PVB material to push away material portion, mounting groove 1709 has been seted up to punching press seat 1708 bottom, punching press first 1707 is installed in mounting groove 1709, punching press first 1707 is L type structure, can punch out the L type PVB strip that meets the requirements, two punching press first 1707 are central symmetry and set up, one-step punching press can form two L type PVB strips, and the production efficiency is improved.

Further optimize the scheme, the pars contractilis is including two cylinders 1710 of symmetry setting, cylinder 1710 top and connecting block 1701 bottom rigid coupling, cylinder 1710 bottom and the 1708 top rigid coupling of punching press seat. When cylinder 1710 extends, punching press seat 1708 moves down for connecting block 1701, punching press seat 1708 drives punching press head 1707 and moves down, punching press head 1707 extrudees with whole PVB material, L type PVB strip that meets the requirements is cut out to punching press head 1707, when cylinder 1710 shortens, punching press seat 1708 moves up for connecting block 1701, punching press seat 1708 drives punching press head 1707 and moves up, punching press head 1707 leaves whole PVB material, it pushes down the L type PVB strip of adhesion on punching press head 1707 to push away the material portion simultaneously.

Further optimize the scheme, the material pushing part includes a plurality of push rods 1706, the top of the push rod 1706 is fixedly connected with the bottom of the connecting block 1701, the bottom of the push rod 1706 is slidably connected with the stamping seat 1708, the bottom end of the push rod 1706 is located inside the stamping head 1707, and the bottom end of the push rod 1706 does not exceed the bottom end of the stamping head 1707. The push rod 1706 is still relative to the connecting block 1701, and when the punching seat 1708 drives the punching head 1707 to move upwards, the bottom end of the push rod 1706 pushes down the L-shaped PVB strip adhered to the punching head 1707.

Further optimize the scheme, the bottom rigid coupling of connecting block 1701 has two at least third guide rails 1705, and third guide rail 1705 vertical setting, third guide rail 1705 top and connecting block 1701 rigid coupling, third guide rail 1705 outer wall and the punching press seat 1708 sliding connection. The third guide rail 1705 plays a role in guiding, so that the stamping seat 1708 can slide up and down, and the stamping seat 1708 is prevented from being inclined in the up-and-down sliding process.

Further optimize the scheme, the supporting component includes base 1, and 1 top both sides limit portion of base rigid coupling respectively has first curb plate 2 and second curb plate 3, and first curb plate 2 and second curb plate 3 are parallel to each other, and the rigid coupling has backing plate 4 in the middle of the 1 top of base, and

first curb plate

2 and 3 both sides limit portions of second curb plate rotate with the lateral shifting subassembly and are connected. The first side plate 2 and the second side plate 3 play a main supporting role, and the whole piece of PVB material is placed above the backing plate 4.

Further optimize the scheme, the lateral shifting subassembly includes two parallel arrangement's first lead screw 9 and second lead screw 10, first lead screw 9 both ends rotate with

first curb plate

2 and 3 limit portions of second curb plate respectively and are connected, second lead screw 10 both ends rotate with

first curb plate

2 and 3 opposite side limit portions of second curb plate respectively and are connected, the common threaded connection in first lead screw 9 and second lead screw 10 middle part has sliding plate 11, 11 top fixed mounting of sliding plate has the longitudinal movement subassembly, first lead screw 9 and 10 homonymy limit portion transmissions of second lead screw are connected with power component. The first lead screw 9 and the second lead screw 10 are driven by the power assembly to rotate, and the sliding plate 11 is driven by the first lead screw 9 and the second lead screw 10 to transversely move.

Further optimize the scheme, power component includes motor 5, motor 5 bottom and 1 top surface rigid coupling of base, motor 5 output shaft rigid coupling has pinion 18, first lead screw 9 one end rigid coupling has first synchronizing wheel 8, second lead screw 10 one end rigid coupling has second synchronizing wheel 19, first synchronizing wheel 8 and second synchronizing wheel 19 are located the homonymy, first synchronizing wheel 8 and 19 outer walls of second synchronizing wheel cup joint hold-in range 7, second lead screw 10 is close to motor 5 one end rigid coupling and has gear wheel 6, gear wheel 6 is connected with pinion 18 meshing. The rotation of the motor 5 drives the pinion 18 to rotate, the pinion 18 drives the gearwheel 6 to rotate, the gearwheel 6 simultaneously drives the second lead screw 10 and the second synchronizing wheel 19 to rotate, the second synchronizing wheel 19 drives the first synchronizing wheel 8 to rotate through the synchronous belt 7, the first synchronizing wheel 8 drives the first lead screw 9 to rotate, and the first lead screw 9 and the second lead screw 10 keep linked to drive the sliding plate 11 to move together.

Further optimize the scheme, the longitudinal movement assembly includes first vertical plate 12 and second vertical plate 13 that the symmetry set up, first vertical plate 12 and second vertical plate 13 bottom and the lateral part rigid coupling in both sides of sliding plate 11, second vertical plate 13 keeps away from first vertical plate 12 one side rigid coupling has lead screw motor 14, lead screw motor 14 passes first vertical plate 12 middle part, lead screw motor 14 axle head and second vertical plate 13 middle part rotate and are connected, lead screw motor 14 and slider 1702 middle part threaded connection, first vertical plate 12 and second vertical plate 13 both sides lateral part rigid coupling respectively have the tip of first guide rail 15 and second guide rail 16, first guide rail 15 and second guide rail 16 parallel arrangement each other, first guide rail 15 and second guide rail 16 are located lead screw motor 14 both sides, first guide rail 15 and second guide rail 16 and slider 1702 middle part sliding connection.

In a further optimized scheme, a threaded hole 1704 is formed in the middle of the slider 1702, the threaded hole 1704 is in threaded connection with the screw motor 14, symmetrically arranged sliding grooves 1703 are formed in the middle of the slider 1702, the two sliding grooves 1703 are located on two sides of the threaded hole 1704, and the two sliding grooves 1703 are respectively in sliding connection with the first guide rail 15 and the second guide rail 16. The sliding block 1702 can longitudinally slide along the first guide rail 15 and the second guide rail 16 through the two sliding slots 1703, the sliding block 1702 is pushed to longitudinally move through the threaded hole 1704 in the rotation process of the screw rod motor 14, and the first vertical plate 12 and the second vertical plate 13 play a role in supporting the screw rod motor 14 and the first guide rail 15 and the second guide rail 16.

The motor 5, the lead screw motor 14 and the air cylinder 1710 are electrically connected with a controller, and the controller can be a PLC controller.

The working process of the embodiment is as follows: the whole PVB material is placed on the backing plate 4, the controller controls the motor 5 and the screw rod motor 14 to operate, the rotation of the motor 5 drives the pinion 18 to rotate, the pinion 18 drives the gearwheel 6 to rotate, the gearwheel 6 simultaneously drives the second screw rod 10 and the second synchronous wheel 19 to rotate, the second synchronous wheel 19 drives the first synchronous wheel 8 to rotate through the synchronous belt 7, the first synchronous wheel 8 drives the first screw rod 9 to rotate, the first screw rod 9 and the second screw rod 10 are linked, and the sliding plate 11 is jointly driven to move to the side close to the second side plate 3; the screw rod motor 14 rotates to drive the sliding block 1702 to move to a side close to the second vertical plate 13, and at this time, the stamping assembly 17 is located at an initial position; the controller controls the cylinder 1710 to extend, the stamping seat 1708 moves downwards relative to the connecting block 1701, the stamping seat 1708 drives the stamping head 1707 to move downwards, the stamping head 1707 is extruded with the whole PVB material, and the stamping head 1707 cuts an L-shaped PVB strip meeting the requirement; the controller controls the cylinder 1710 to shorten, the stamping seat 1708 moves upwards relative to the connecting block 1701, the stamping seat 1708 drives the stamping head 1707 to move upwards, the stamping head 1707 leaves the whole PVB material, and meanwhile the push rod 1706 pushes down the L-shaped PVB strips adhered to the stamping head 1707; the controller controls the motor 5 and the screw motor 14 to operate, so that the punching assembly 17 moves to the next position to be cut, and the steps are repeated in a circulating mode until the whole PVB material is cut.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a PVB guillootine which characterized in that: the stamping device comprises a supporting component, wherein the top of the supporting component is rotationally connected with a transverse moving component, one side of the transverse moving component is in transmission connection with a power component, the top of the transverse moving component is fixedly provided with a longitudinal moving component, and the middle part of the longitudinal moving component is in sliding connection with a stamping component (17);

the stamping assembly (17) comprises a slider (1702), the middle of the slider (1702) is connected with the longitudinal moving assembly in a sliding mode, a connecting block (1701) is fixedly connected to the bottom of the slider (1702), a stamping seat (1708) is connected to the bottom of the connecting block (1701) in a sliding mode, a telescopic part and a material pushing part are arranged between the stamping seat (1708) and the connecting block (1701), two stamping heads (1707) which are arranged in a centrosymmetric mode are detachably connected to the bottom of the stamping seat (1708), and the stamping heads (1707) are of an L-shaped structure.

2. The PVB cutting machine according to claim 1, wherein: the telescopic part comprises two cylinders (1710) which are symmetrically arranged, the top of each cylinder (1710) is fixedly connected with the bottom of the connecting block (1701), and the bottom of each cylinder (1710) is fixedly connected with the top of the stamping seat (1708).

3. The PVB cutting machine according to claim 1, wherein: the pushing part comprises a plurality of push rods (1706), the top of each push rod (1706) is fixedly connected with the bottom of the connecting block (1701), the bottom of each push rod (1706) is slidably connected with the corresponding stamping seat (1708), the bottom end of each push rod (1706) is located inside the corresponding stamping head (1707), and the bottom end of each push rod (1706) does not exceed the bottom end of the corresponding stamping head (1707).

4. The PVB cutting machine according to claim 1, wherein: at least two third guide rails (1705) are fixedly connected to the bottom of the connecting block (1701), the third guide rails (1705) are vertically arranged, the top of each third guide rail (1705) is fixedly connected with the connecting block (1701), and the outer wall of each third guide rail (1705) is slidably connected with the stamping seat (1708).

5. The PVB cutting machine according to claim 1, wherein: the supporting component comprises a base (1), wherein two side edges of the top of the base (1) are respectively fixedly connected with a first side plate (2) and a second side plate (3), the first side plate (2) and the second side plate (3) are parallel to each other, a base plate (4) is fixedly connected in the middle of the top of the base (1), and the two side edges of the first side plate (2) and the second side plate (3) are rotatably connected with the transverse moving component.

6. The PVB guillootine of claim 5, characterized in that: the transverse moving assembly comprises a first lead screw (9) and a second lead screw (10) which are arranged in parallel, the two ends of the first lead screw (9) are respectively connected with the edge parts of the first side plate (2) and the second side plate (3) in a rotating mode, the two ends of the second lead screw (10) are respectively connected with the edge parts of the first side plate (2) and the other side of the second side plate (3) in a rotating mode, the middle parts of the first lead screw (9) and the second lead screw (10) are jointly in threaded connection with a sliding plate (11), a longitudinal moving assembly is fixedly mounted at the top of the sliding plate (11), and the first lead screw (9) and the second lead screw (10) are in transmission connection with the same side edge part of the power assembly.

7. The PVB guillootine of claim 6, characterized in that: the power component comprises a motor (5), the bottom of the motor (5) is fixedly connected with the top surface of the base (1), a pinion (18) is fixedly connected with an output shaft of the motor (5), a first synchronous wheel (8) is fixedly connected with one end of a first lead screw (9), a second synchronous wheel (19) is fixedly connected with one end of a second lead screw (10), the first synchronous wheel (8) is fixedly connected with the second synchronous wheel (19), the second synchronous wheel (19) is located on the same side, the first synchronous wheel (8) is fixedly connected with the outer wall of the second synchronous wheel (19) in a sleeved mode, a synchronous belt (7) is arranged on the outer wall of the second synchronous wheel (19), the second lead screw (10) is close to the gear wheel (6) which is fixedly connected with one end of the motor (5), and the gear wheel (6) is meshed with the pinion (18).

8. The PVB guillootine of claim 6, characterized in that: the longitudinal moving assembly comprises a first vertical plate (12) and a second vertical plate (13) which are symmetrically arranged, the bottoms of the first vertical plate (12) and the second vertical plate (13) are fixedly connected with the side parts of two sides of the sliding plate (11), one side, far away from the first vertical plate (12), of the second vertical plate (13) is fixedly connected with a screw rod motor (14), the screw rod motor (14) penetrates through the middle part of the first vertical plate (12), the shaft end of the screw rod motor (14) is rotatably connected with the middle part of the second vertical plate (13), the screw rod motor (14) is in threaded connection with the middle part of the sliding block (1702), the side parts of two sides of the first vertical plate (12) and the second vertical plate (13) are respectively fixedly connected with the end parts of a first guide rail (15) and a second guide rail (16), the first guide rail (15) and the second guide rail (16) are arranged in parallel, and the first guide rail (15) and the second guide rail (16) are positioned on two sides of the screw rod motor (14), the first guide rail (15) and the second guide rail (16) are connected with the middle part of the sliding block (1702) in a sliding mode.

9. The PVB cutting machine according to claim 8, wherein: the middle of the sliding block (1702) is provided with a threaded hole (1704), the threaded hole (1704) is in threaded connection with the screw rod motor (14), the middle of the sliding block (1702) is provided with symmetrically arranged sliding grooves (1703), the two sliding grooves (1703) are located on two sides of the threaded hole (1704), and the two sliding grooves (1703) are respectively in sliding connection with the first guide rail (15) and the second guide rail (16).