CN216881125U

CN216881125U - Saw blade straightening machine

Info

Publication number: CN216881125U
Application number: CN202220250469.0U
Authority: CN
Inventors: 吴迪; 李登峰; 吴滨
Original assignee: Yichang Disen Machinery Co ltd
Current assignee: Yichang Disen Machinery Co ltd
Priority date: 2022-02-07
Filing date: 2022-02-07
Publication date: 2022-07-05
Anticipated expiration: 2032-02-07

Abstract

The utility model provides a saw blade straightening machine which comprises a rack, wherein the rack comprises a supporting frame, an object supporting table and a fixed seat are arranged on the supporting frame, a workbench is arranged on the object supporting table and used for fixing a workpiece, a strengthening unit is arranged on the fixed seat and comprises a machine body, the machine body is connected with the fixed seat in a sliding mode, the upper portion of the machine body is connected with a swinging head through a hydraulic cylinder, and the swinging head is used for straightening and strengthening the workpiece. The automatic detection and strengthening method greatly improves the production efficiency of the saw blade, ensures the production quality of the saw blade, reduces the labor intensity of workers, is more favorable for batch processing and manufacturing, and has good economic benefit in actual production.

Description

Saw blade straightening machine

Technical Field

The utility model relates to the field of patents, in particular to a saw blade straightening machine.

Background

A circular saw blade is a commonly used cutting tool, which needs to be subjected to heat treatment several times when being manufactured to achieve good hot hardness, wear resistance and high temperature resistance, but inevitably has problems of non-uniform internal stress or deviation of tension from a desired value during the heat treatment. The traditional mode is that only one piece of sheet can be processed by manually hammering, the labor intensity is high, the technical requirement on personnel is high, and the overall phase rate is low.

Chinese patent document CN 202387804U describes a circular saw blade radial and tangential combined stress rolling processing device, but this structure mainly processes the circular saw surface by rolling, and there is no detection system to perform fine stress uniform distribution to the saw blade, there is a defect in the use process, so it needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a saw blade straightening machine, which solves the problems that a circular saw blade is uneven in stress distribution in the production process, the straightening strengthening process is complex, manual treatment is needed, the labor intensity is high, and the efficiency is low.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the saw blade straightening machine comprises a machine frame and is characterized in that the machine frame comprises a supporting frame, an object supporting table and a fixing seat are arranged on the supporting frame, a workbench is arranged on the object supporting table and used for fixing a workpiece, a strengthening unit is arranged on the fixing seat and located right in front of the strengthening unit, the strengthening unit comprises a machine body, the machine body is in sliding connection with the fixing seat, the upper portion of the machine body is connected with a swing head through a swing cylinder, and the swing head is used for correcting and strengthening the workpiece.

In the preferred scheme, a rotary power assembly and a hydraulic power assembly are arranged in the support frame, and the rotary power assembly and the hydraulic power assembly are respectively used for providing power for the workbench and the strengthening unit.

In the preferred scheme, the workbench is arranged in the middle of the object supporting table, the laser detection system and the tension detection system are symmetrically arranged on two sides of the object supporting table, and the distance between the laser detection system and the tension detection system is larger and larger along the direction far away from the workbench.

In the preferred scheme, a blank rod seat and a finished product supporting plate are further arranged on two sides of the object supporting table, the blank rod seat and the finished product supporting plate are respectively located on the outer sides of the laser detection system and the tension detection system, and magnetic force slicing mechanisms for slicing are arranged on two sides of the blank rod seat.

In an optimized scheme, a hydraulic cylinder is arranged in the swing head, a first dotting seat is arranged at the bottom of the hydraulic cylinder, a second dotting seat is arranged at the upper part of the lathe bed, and the second dotting seat and the first dotting seat are arranged in a right-to-right mode.

In a preferred scheme, the first dotting seat is connected with the second dotting seat through a synchronous connecting rod.

In the preferred scheme, a main shaft is arranged in the workbench, a fixing head is arranged at the top of the main shaft, and the main shaft is connected with the rotary power assembly through a synchronous belt.

In a preferred embodiment, a step is provided between the object support platform and the fixing base.

In the preferred scheme, a beam support is arranged on the fixed seat, a beam assembly is arranged on the upper portion of the beam support, and an upper piece manipulator and a lower piece manipulator are arranged on the beam assembly.

In the preferred scheme, the crossbeam support includes two vertical braces that set up relatively, and the upper portion of vertical brace is equipped with the kink, and two kinks pass through the crossbeam assembly and connect.

The utility model has the beneficial effects that: through set up the workstation in the frame and reinforce the unit, can carry out the hammering with the saw bit surface on the workstation and reinforce, the workstation can be according to laser detecting system 13 and tension detecting system's detection data, the position direct rotation that needs the saw bit to process is beaten between the seat to the first of strengthening the unit and the seat is beaten to the second, accomplish the beating on saw bit surface with the help of the swing jar and reinforce, piece feeding manipulator cooperation piece discharging manipulator is moved the blank pole seat and is circulated to the finished product layer board after the processing on the workstation, the detection and the correction of whole automatic completion saw bit, high accuracy, high effects, and need not artificial intervention, the production efficiency of saw bit has been improved by a wide margin.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

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

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is an overall view of the adaptive auxiliary fixing mechanism of the present invention;

FIG. 4 is a schematic top view of FIG. 3;

FIG. 5 is a schematic front view of FIG. 3;

FIG. 6 is the first exploded view of FIG. 3;

FIG. 7 is the second state of the exploded view of FIG. 3;

FIG. 8 is state three of the exploded view of FIG. 3;

FIG. 9 is a schematic view of the holder of the present invention;

FIG. 10 is a schematic view of the adjuster of the present invention;

FIG. 11 is a schematic view of a slide bar construction of the present invention;

fig. 12 is an enlarged schematic view at a of fig. 8.

In the figure: a frame 1; a support frame 101; an object support table 102; a fixed seat 103; a step 104; a blank stem base 105; a finished pallet 106; a work table 2; a main shaft 201; a fixed head 202; a beam support 3; a vertical support 301; a bent portion 302; a beam assembly 4; a loading manipulator 5; a wafer discharging manipulator 6; a reinforcement unit 7; a bed 701; a guide rail 702; a second dotting station 703; a swing head 704; a first dotting station 705; a hydraulic cylinder 706; a swing cylinder 707; an adjustment handle 708; a first chute 709; a first threaded hole 710; a lock block 711; a synchronization link 712; a rotary power assembly 8; a hydraulic power assembly 9; a feeding system 10; a workpiece 11; a magnetic force slicing mechanism 12; a laser detection system 13; a tension detection system 14; an adaptive auxiliary fixing mechanism 15; a grip block 1501; a clamp plate 1502; a mounting groove 1503; a clamping plate 1504; a slider 1505; a drive plate 1506; a limiting plate 1507; a screw 1508; a slide bar 1509; a first spring 1510; a plate body 1511; a third spring 1512; a second chute 1513; a first straight groove 1514; a second threaded hole 1515; a sled 1516; a support plate 1517; a groove 1518; a second straight groove 1519; a second yield slot 1530; a reset rod 1520; a second spring 1521; a cylindrical head 1522; a first ear plate 1523; a first yielding slot 1524; a mounting straight plate 1525; an arc contact plate 1526; a third ear panel 1527; a fourth ear panel 1528; a nut 1529; a plate body 1530; a fourth spring 1531; a circular arc portion 1532; a locking pin 16; a telescopic cylinder 17; a top bar 1701; a mount 1702; an arc-shaped slot 1703; a through hole 1704; an adjustment member 18; a first support ring 1801; a second support ring 1802; a second ear plate 1803.

Detailed Description

Example 1

As shown in fig. 1-2, a saw blade straightening machine includes a frame 1, and is characterized in that the frame 1 includes a support frame 101, an object supporting table 102 and a fixing base 103 are provided on the support frame 101, a worktable 2 is provided on the object supporting table 102, the worktable 2 is used for fixing a workpiece 11, a strengthening unit 7 is provided on the fixing base 103, the worktable 2 is located right in front of the strengthening unit 7, the strengthening unit 7 includes a bed 701, the bed 701 is slidably connected with the fixing base 103, an upper portion of the bed 701 is connected with a swing head 704 through a swing cylinder 707, and the swing head 704 is used for strengthening and correcting the workpiece 11. The rear part of the lathe bed 701 is driven by the feeding system 10, so that the supporting table 102 is matched with the fixed table 103, meanwhile, the strengthening unit 7 is over against the workbench 2, the workpiece 11 is uniformly stressed during hammering, the whole strengthening effect is better, for workpieces 11 with different diameters, the position of the lathe bed 701 relative to the fixed seat 103 can be adjusted according to the hammering area, hammering is accurate and convenient, and the swinging head 704 is used for applying precise force to the part needing to be corrected under the action of the swinging cylinder 707.

In a preferable scheme, a rotary power assembly 8 and a hydraulic power assembly 9 are arranged in the support frame 101, and the rotary power assembly 8 and the hydraulic power assembly 9 are respectively used for providing power for the workbench 2 and the strengthening unit 7. From this structure to make whole convenient to use, be provided with angle encoder on workstation 2, can rotate the design position under rotary power assembly 8's drive, whole quick accuracy, hydraulic power assembly 9 then can provide stable holding down force for swing head 704.

In a preferred scheme, the workbench 2 is arranged in the middle of the object support platform 102, the laser detection system 13 and the tension detection system 14 are symmetrically arranged on two sides of the object support platform 102, and the distance between the laser detection system 13 and the tension detection system 14 is gradually increased along the direction away from the workbench 2. With the structure, the workbench 2 drives the workpiece 11 to rotate along the uniform circumferential direction, the relative position deviation and the distribution range of the tension of the surface of the saw blade can be detected by the laser detection system 13 and the tension detection system 14, the position of the strength unit 7 is set as a relative zero position during the initial calibration, for areas that do not comply, the angle encoder, which is now located in the table 2, records the angle value at this time, after the workpiece 11 completes the detection of a whole circle, the workpiece is sequentially rotated to the position right below the strengthening unit 7 according to the angle value which does not meet the requirement, then the position of the lathe bed 701 is adjusted, after the correction of all the unqualified points is completed by hammering the swinging head 704, the laser detection system 13 and the tension detection system 14 can perform repeated detection on the relative position deviation of the surface of the saw blade and the distribution range of the tension until all the areas pass the production specification requirements.

In a preferred scheme, a blank rod seat 105 and a finished product supporting plate 106 are further disposed on two sides of the object supporting platform 102, the blank rod seat 105 and the finished product supporting plate 106 are respectively located on the outer sides of the laser detection system 13 and the tension detection system 14, and magnetic force slicing mechanisms 12 for slicing are disposed on two sides of the blank rod seat 105. From this structure to make can be with the help of the manipulator in proper order with the work piece 11 on the blank pole seat 105 remove the workstation 2 on accomplish the detection correct with the reinforcement back, shift to the finished product layer board 106 on, guaranteed whole flow moving high efficiency, and avoided the loaded down with trivial details of debugging, can both carry out quick production to the supplied materials of different specifications and batch.

In a preferred scheme, a hydraulic cylinder 706 is arranged in the swing head 704, a first dotting seat 705 is arranged at the bottom of the hydraulic cylinder 706, a second dotting seat 703 is arranged at the upper part of the bed 701, and the second dotting seat 703 is opposite to the first dotting seat 705. One end of the hydraulic cylinder 706 is provided with an adjusting handle 708, the adjusting handle 708 is in threaded connection with the swinging head 704, and the hydraulic cylinder 706 is slidably arranged on the inner side of the swinging head 704, so that the structure is adopted, the position of the hydraulic cylinder 706 is adjusted by changing the position of the adjusting handle 708, the distance between the first dotting seat 705 and the second dotting seat 703 is changed, the hammering strength and effect are adjusted, and the saw blade production device can be suitable for saw blades with different thicknesses.

In a preferred embodiment, the first dotting seat 705 is connected to the second dotting seat 703 through a synchronization link 712. The first dotting seat 705 is provided with a rotary cylinder, and the second dotting seat 703 is rotatably arranged on the bed 701, so that the structure is that the synchronous connecting rod 712 can control the first dotting seat 705 and the second dotting seat 703 to synchronously turn by the operation of the rotary cylinder, thereby applying different strengthening patterns to the workpiece 11.

In a preferred scheme, a main shaft 201 is arranged in the workbench 2, a fixed head 202 is arranged at the top of the main shaft 201, and the main shaft 201 is connected with the rotary power assembly 8 through a synchronous belt. The lower part of fixed head 202 is provided with taut cylinder, and from this structure to make after work piece 11 has been placed, can be with firm the fixing on fixed head 202 of work piece 11 through taut cylinder, thereby guaranteed the stability of detection data, and for strengthening provide the basis, avoided the atress uneven to lead to the work piece to strengthen inaccurate.

Preferably, a step 104 is provided between the object support platform 102 and the fixing base 103. Therefore, the structure enables the whole space utilization rate to be higher, and debugging and detection production are facilitated.

In a preferable scheme, a beam support 3 is arranged on the fixed seat 103, a beam assembly 4 is arranged on the upper portion of the beam support 3, and an upper wafer manipulator 5 and a lower wafer manipulator 6 are arranged on the beam assembly 4. From this structure to make and adopt the whole rigidity of planer-type structure good, bearing capacity is strong, and last piece manipulator 5 and lower piece manipulator 6 are used for respectively moving work piece 11 on the blank pole seat 105 to finished product layer board 106, and automated production overall stability is high, and it is more convenient to control, and efficiency also has the abundant guarantee.

In a preferred scheme, the beam support 3 includes two vertical supports 301 disposed oppositely, a bent portion 302 is disposed at an upper portion of each vertical support 301, and the two bent portions 302 are connected by the beam assembly 4. With the structure, the whole installation and detachment are convenient, the whole rigidity is good, the bent part 302 provides a support foundation for the beam assembly 4, and the utilization rate of the whole space is higher.

Example 2

As shown in fig. 3 to 12, different from embodiment 1, the bed 701 is detachably provided with the adaptive auxiliary fixing mechanism 15, and the adaptive auxiliary fixing mechanism 15 is used for clamping the workpieces 11 with different diameters and thicknesses, so that it is ensured that when the workpiece 11 is strengthened by the strengthening unit 7, the whole workpiece 11 is more stable, the strengthening effect is better, and it is avoided that the bottom of the extending portion is not fully supported, so that the strengthening is caused by vibration, the whole quality is unstable, and the effect is poor.

In the preferable scheme, two sides of the bed 701 are respectively provided with a first chute 709, the first chute 709 is internally provided with a plurality of first threaded holes 710, a locking block 711 is slidably arranged in the first chute 709, and the locking block 711 is connected with the bed 701 through a locking 16;

the self-adaptive auxiliary fixing mechanism 15 comprises a clamping seat 1501, a clamping plate 1502 is arranged on the clamping seat 1501 in a sliding mode, the bottom of the clamping seat 1501 is connected with a sliding block 1505 through a driving plate 1506, the sliding block 1505 is arranged in a first sliding groove 709 in a sliding mode, a telescopic cylinder 17 is connected to one side, away from a locking block 711, of the sliding block 1505, the telescopic cylinder 17 is connected with a machine tool body 701 through a mounting seat 1702, a screw 1508 is arranged on the mounting seat 1702, the screw 1508 is arranged in parallel with the telescopic cylinder 17, the screw 1508 is connected with the telescopic cylinder 17 through an adjusting piece 18, and the adjusting piece 18 is connected with the clamping plate 1502 through a first spring 1510. With the structure, the top rod 1701 of the telescopic cylinder 17 can push the sliding block 1505 to move in the first sliding groove 709, the sliding block 1505 pulls the driving plate 1506 to drive the clamping seat 1501 to move towards the workpiece, because the position of the adjusting piece 18 is relatively fixed, the first spring 1510 is stretched, one end of the first spring 1510 is fixed on one side of the clamping plate 1502 close to the workpiece 11, the first spring 1510 provides a downward force to the front end of the clamping plate 1502, the clamping plate 1502 presses downwards, the upper surface of the workpiece 11 is limited and supported, the workpiece 11 is limited in the vertical direction by matching with the second dotting seat 703, vibration or vibration is prevented from being generated when the swinging head 704 works, and poor strengthening effect is avoided.

In a preferred embodiment, the driving plate 1506 is connected to the clamping plate 1502 through a limiting plate 1507. Be provided with first groove 1524 of stepping down on the drive plate 1506, be equipped with installation straight board 1525 on the splint 1502, installation straight board 1525 passes through the bottom that the staple 16 fixed at centre gripping seat 1501, structure from this to make limiting plate 1507 give splint 1502 restriction, prevent its off tracking unstability, whole removal is more smooth and easy simultaneously.

In an optimal scheme, a plurality of through holes 1704 are formed in the bottom of the mounting seat 1702, screws 16 are arranged in the through holes 1704 in a penetrating manner, an arc-shaped groove 1703 is formed in one side of the mounting seat 1702, which is opposite to the telescopic cylinder 17, a small end of a screw 1508 is arranged in the arc-shaped groove 1703 in a penetrating manner, the diameter of the large end of the screw 1508 is larger than the width of the arc-shaped groove 1703, the small end of the screw is connected with the mounting seat 1702 through a locking 16, the adjusting member 18 comprises a first support ring 1801, a second support ring 1802 and a second lug plate 1803 which are arranged from bottom to top, the first support ring 1801 is sleeved on the outer side of the telescopic cylinder 17, the inner diameter of the first support ring 1801 is matched with the outer diameter of the telescopic cylinder 17, the screw 1508 is arranged in the second support ring 1802 in a penetrating manner, the first spring 1510 is connected with the second lug plate 1803, and the screw 1508 locks the adjusting member 18 through symmetrically arranged nuts 1529. By the aid of the mechanism, the adjusting piece 18 can be rapidly moved by changing the position of the nut 1529, so that the pretightening force of the first spring 1510 is changed, the whole use is more convenient, and the adjustment is more efficient.

In a preferable scheme, the clamping seat 1501 includes a sliding plate 1516, a second sliding groove 1513 is disposed at the bottom of the sliding plate 1516, the width of the second sliding groove 1513 matches with the width of the machine tool body 701, two supporting plates 1517 are disposed opposite to each other on one side of the sliding plate 1516, a groove 1518 is disposed on the inner side of the supporting plate 1517, a second straight groove 1519 is disposed in the groove 1518, the second straight groove 1519 is disposed on the supporting plate 1517 in a penetrating manner, the clamping plate 1502 includes a plate body 1511, two first ear plates 1523 are disposed opposite to the outer side of the plate 1511, one side of the first spring 1510 is fixed on the first ear plate 1523, a second abdicating groove 1530 is symmetrically disposed on one side of the plate 1511, a cylinder head 1522 is disposed in the second abdicating groove 1530, the cylinder head 2 is slidably disposed in the groove 1518, the cylinder head 1522 is hinged to the second straight groove 1519 through a lock pin 16, the bottom of the plate 1511 is connected to a return round rod 1520 through a plurality of second springs 1521, the two sides of the sliding plate 1516 are respectively, and a second threaded hole 1525 is connected to the drive plate 1506 through a lock pin 16, the lower part of the plate body 1511 is also provided with an arc contact plate 1526. From this structure, so that splint 1502 can reciprocate in recess 1518, circular arc contact plate 1526 direct contact work piece 11, circular arc contact plate 1526 adopts rubber material, can increase area of contact when the atress, holistic centre gripping is effectual, can be under the tensile force state of receiving first spring 1510 simultaneously, at the rotation of second straight flute 1519, the round bar 1520 that resets this moment receives the extrusion, tightly support and lean on the surface at slide 1516, when ejector pin 1701 drives slider 1505 and leaves work piece 11, splint 1502 resumes to initial position under the effect of second spring 1521, the high-efficient accuracy of whole motion. Because the thickness of the cutting insert particles on the outer side of the saw blade is generally larger than that of the saw blade matrix, the clamping plate 1502 is pressed downwards, so that the influence on the cutting insert can be completely avoided, the whole safety and high efficiency are realized, and the quality of the saw blade is ensured.

In a preferable scheme, a mounting groove 1503 and a first straight groove 1514 are arranged on the sliding plate 1516, the mounting groove 1503 is communicated with the first straight groove 1514, a clamping plate 1504 is slidably arranged in the mounting groove 1503, a sliding rod 1509 is arranged in the first straight groove 1514, fourth ear plates 1528 are respectively arranged on two sides of the sliding rod 1509, and the fourth ear plates 1528 are respectively connected with the sliding plate 1516 and the driving plate 1506 through a third spring 1512 and a fourth spring 1531. The bottom of the clamping plate 1504 is provided with a circular arc portion 1532, the driving plate 1506 is provided with a third ear plate 1527, a fourth spring 1531 is fixed on the third ear plate 1527, the third spring 1512 is connected with a sliding plate 1516 through a locking pin 16, and the structure is such that when the slider 1505 is close to the workpiece 11, the fourth spring 1531 is pulled to drive the sliding rod 1509 to move in the first straight groove 1514, so that the sliding rod 1509 pushes the clamping plate 1504 to slide out of the mounting groove 1503, the clamping plate 1504 clamps the workpiece 11 from the lower part, the clamping plate 1504 clamps from the lower part to avoid influence on the insert, after the strengthening is completed, the slider 1505 returns to the initial position under the action of the push rod 1701, at the moment, the third spring 1512 pulls the sliding rod 1509 to reset, and at the moment, the clamping plate 1504 falls back into the mounting groove 1503.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. The utility model provides a saw blade levelling machine, includes frame (1), characterized by: frame (1) includes support frame (101), be equipped with article supporting bench (102) and fixing base (103) on support frame (101), be equipped with workstation (2) on article supporting bench (102), workstation (2) are used for fixed work piece (11), be equipped with on fixing base (103) and strengthen unit (7), workstation (2) are located the dead ahead of strengthening unit (7), strengthen unit (7) including lathe bed (701), lathe bed (701) and fixing base (103) sliding connection, lathe bed (701) upper portion is connected through swing cylinder (707) and swing head (704), swing head (704) are used for correcting the reinforcement to work piece (11).

2. The saw blade corrector of claim 1, wherein: be equipped with rotary power assembly (8) and hydraulic power assembly (9) in support frame (101), rotary power assembly (8) and hydraulic power assembly (9) are used for providing power to workstation (2) and intensive unit (7) respectively.

3. The saw blade corrector of claim 1, wherein: the workbench (2) is arranged in the middle of the object supporting platform (102), the laser detection system (13) and the tension detection system (14) are symmetrically arranged on two sides of the object supporting platform (102), and the distance between the laser detection system (13) and the tension detection system (14) is gradually increased along the direction far away from the workbench (2).

4. The saw blade corrector of claim 3, wherein: a blank rod seat (105) and a finished product supporting plate (106) are further arranged on the two sides of the object supporting platform (102), the blank rod seat (105) and the finished product supporting plate (106) are respectively located on the outer sides of the laser detection system (13) and the tension detection system (14), and magnetic force slicing mechanisms (12) for slicing are arranged on the two sides of the blank rod seat (105).

5. The saw blade corrector of claim 1, wherein: a hydraulic cylinder (706) is arranged in the swing head (704), a first dotting seat (705) is arranged at the bottom of the hydraulic cylinder (706), a second dotting seat (703) is arranged at the upper part of the lathe bed (701), and the second dotting seat (703) and the first dotting seat (705) are arranged in a right-to-right mode.

6. The saw blade corrector of claim 5, wherein: the first dotting seat (705) is connected with the second dotting seat (703) through a synchronous connecting rod (712).

7. The saw blade corrector of claim 2, wherein: a main shaft (201) is arranged in the workbench (2), a fixing head (202) is arranged at the top of the main shaft (201), and the main shaft (201) is connected with the rotary power assembly (8) through a synchronous belt.

8. The saw blade corrector of claim 1, wherein: a step (104) is arranged between the object supporting platform (102) and the fixed seat (103).

9. The saw blade corrector of claim 1, wherein: the automatic wafer feeding device is characterized in that a beam support (3) is arranged on the fixing seat (103), a beam assembly (4) is arranged on the upper portion of the beam support (3), and an upper wafer manipulator (5) and a lower wafer manipulator (6) are arranged on the beam assembly (4).

10. The saw blade corrector of claim 9, wherein: the beam support (3) comprises two vertical supports (301) which are oppositely arranged, a bending part (302) is arranged on the upper part of each vertical support (301), and the two bending parts (302) are connected through a beam assembly (4).