Plane segmented automatic conveying chain device

Abstract

The utility model relates to a plane segmentation automatic conveying chain device which comprises two conveying chains arranged in parallel, a driving device is arranged between the two conveying chains, one ends of the two conveying chains are respectively provided with a driven main device connected with the driving device, and the other ends of the two conveying chains are respectively provided with a driven locking device. The two conveying chains are respectively provided with a driven main bending entering mechanism, a driven secondary bending entering mechanism and a multifunctional pushing handle in sequence. In the implementation process, complete synchronization of the two conveying chains can be achieved, accidents caused by inconsistent conveying rhythms can be avoided, meanwhile, the conveying chains in the technology can be suitable for thin plates of different thicknesses, specifications and sizes, the application range is wide, the conveying chains are stable in the overall conveying process, and the overall service life of the device is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ship body structure conveying system, in particular to a plane section automatic conveying chain device, especially to the plane section automatic conveying chain device in ship body structure. BACKGROUND

[0002] In prior art, according to the ship body structure characteristics, shipyard production conditions and construction process requirements, the ship body is reasonably divided into several ship body structure sections forming independent assembly units. According to the shape, it can be divided into plane section, curved section and three-dimensional section.

[0003] The line body span of plane section welding forming is extremely large, and long-distance conveying chain device is inevitably used, so the performance of conveying chain device is also extremely high.

[0004] In the traditional plane section conveying chain, two production lines and two sets of driving devices are generally equipped, but the hidden trouble brought at the same time is that the single production conveying chain controlled by two sets of driving devices cannot realize one-to-one correspondence in the same time period, the conveying beat and driving displacement cannot be completely synchronized, and the fault is extremely easy to occur, the maintenance and construction cost are extremely high.

[0005] Therefore, there is an urgent need for an improved plane section automatic conveying chain device in the market, so that two conveying chains can be completely synchronized. SUMMARY

[0006] The utility model discloses a kind of plane section automatic conveying chain devices, and the structure is improved, two conveying chains are completely synchronized, with high safety factor, while maintenance is convenient, it is suitable for the conveying of multiple profiles, and the scope of application is wide.

[0007] In order to achieve the above object, the technical scheme of the utility model is: a plane section automatic conveying chain device, characterized by: the plane section automatic conveying chain device includes two parallel conveying chains, a driving device is provided between the two conveying chains, one end of the two conveying chains is respectively provided with a driven main device connected with the driving device, and the other end of the two conveying chains is respectively provided with a driven locking device;A driven main bending entry mechanism, a driven secondary bending entry mechanism and a multifunctional pusher are sequentially provided on the two conveying chains.

[0008] Preferably, the driving device includes a driving main seat, a reduction gear and a three-phase asynchronous driving motor are provided on the driving main seat, a drum gear coupling is provided between the reduction gear and the three-phase asynchronous driving motor, flange couplings are respectively provided on both sides of the three-phase asynchronous driving motor;A reduction gear mounting mechanism is provided between the reduction gear and the driving main seat, reinforcing plate ribs are provided on four edges of the driving main seat, and two protruding adjustment blocks are provided at one end of the driving main seat.

[0009] Further, the driven main device comprises a driven support base, four stud vertical bearing seat assemblies are arranged on the driven support base, a transmission shaft is arranged on the four stud vertical bearing seat assemblies, an 8-toothed chain wheel is arranged on one end of the transmission shaft, and a cover plate is arranged on one end of the 8-toothed chain wheel and used for limiting.

[0010] Further, the four stud vertical bearing seat assemblies comprise four stud vertical bearing seats, a self-aligning roller bearing is arranged in each four stud vertical bearing seat, a standard positioning ring is arranged on the side of the self-aligning roller bearing and used for axial limiting, and a locking sleeve is arranged on the outside of the self-aligning roller bearing and used for radial limiting.

[0011] Further, the driven locking device comprises a support main base, a connecting bottom plate is arranged on the support main base, two support frames are arranged side by side on the connecting bottom plate, a driven chain wheel is arranged between the two support frames, a locking flange is arranged at one end of each of the two support frames, an adjusting bolt is arranged on one side of the locking flange, the locking flange and the adjusting bolt are connected through a locking nut, and a driving ring is arranged on the adjusting bolt.

[0012] Further, the support frame is linked by a top connecting plate, a vertical left side support frame and a vertical right side support frame, two auxiliary slide rails are arranged in each support frame, one auxiliary slide rail is connected with the connecting bottom plate, and the other auxiliary slide rail is connected with the top connecting plate; a special sleeve is connected with the driven chain wheel, and a high-strength cover plate is arranged on one side of the special sleeve and used for limiting axial movement.

[0013] Further, the driven main bending entering mechanism comprises a horizontal channel steel and a vertical channel steel which is vertically linked with the horizontal channel steel, a fixing plate and a plurality of adjusting foot structures are connected with the horizontal channel steel, each adjusting foot structure comprises an adjusting bolt, and symmetrically arranged welding feet are connected with the two sides of the adjusting bolt; the horizontal channel steel comprises two horizontal channel steels, one end of the two horizontal channel steels is arranged in parallel, and an included angle is arranged between the other two horizontal channel steels, and the degree of the included angle is 15-40 degrees.

[0014] Further, the multi-function pushing handle comprises side edges, a bottom edge and a long straight blocking edge, the included angle between the long straight blocking edge and a horizontal plane is 75-85 degrees, and the bottom edge is provided with two positioning clamping holes.

[0015] Compared with the prior art, the technical scheme of the utility model not only has the improvement of the overall technical scheme, but also has the improvement of many details, and specifically has the following beneficial effects:

[0016] 1. The improved scheme of the utility model discloses a plane segmented automatic conveying chain device, including two parallelly arranged conveying chains, being equipped with driving device between two conveying chains, one end of two conveying chains is equipped with driven main device connected with driving device respectively, the other end of two conveying chains is equipped with driven locking device respectively, two conveying chains are equipped with driven main curved entering mechanism, driven secondary curved entering mechanism and multifunctional pusher in proper order respectively, so that two conveying chains can transport completely synchronously, conveying chain can be applicable to thin plate of different thickness, specification and size, artificial cost and maintenance cost are reduced greatly.

[0017] 2. The technical scheme of the utility model discloses a driven main device, including driven support seat, being equipped with four stud vertical bearing seat total body on driven support seat, being equipped with transmission shaft on four stud vertical bearing seat total body, being equipped with 8-toothed sprocket on one end of transmission shaft, being equipped with cover plate for limiting on one end of 8-toothed sprocket, driven part here is improved and structure is handled, so that overall strength is enhanced while structure is more simple and convenient, cost is reduced, and equipment performance is greatly improved simultaneously.

[0018] 3. The structure of the utility model, four stud vertical bearing seat total body includes four stud vertical bearing seat, four stud vertical bearing seat is equipped with self-aligning roller bearing in, the side of self-aligning roller bearing is equipped with standard positioning ring for axial limiting, the outside of self-aligning roller bearing is equipped with locking sleeve for radial limiting, so that the device runs more stably, guarantees the safety of use, improves the service life of the device.

[0019] 4. The utility model discloses simple structure, reasonable in layout, convenient to use, high stability, conveying accuracy and precision are greatly improved, and the scope is wider, and it is convenient to promote and use. SHEET

[0020] Figure 1 It is structural schematic drawing of an embodiment of the utility model.

[0021] Figure 2 It is structural schematic drawing of the driving device of an embodiment of the utility model.

[0022] Figure 3 It is structural schematic drawing of driven main device of still another embodiment of the utility model.

[0023] Figure 4 It is structural schematic drawing of four stud vertical bearing seat total body of still another embodiment of the utility model.

[0024] Figure 5 It is structural schematic drawing of driven locking device of the utility model.

[0025] Figure 6 It is structural schematic drawing of driven main curved entering mechanism of the utility model.

[0026] Figure 7 It is the structural schematic view of the multifunctional push hand of the utility model.

[0027] Reference signs:

[0028] 1 drive device, 2 driven main device, 3 driven locking device, 4 driven main bending entry mechanism, 5 driven secondary bending entry mechanism, 6 multifunctional push hand, 7 conveying chain;

[0029] 2-1 side edge, 2-2 bottom edge, 2-3 long straight blocking edge, 2-4 positioning clamping hole;

[0030] 3-1 drive main seat, 3-2 speed reducer mounting mechanism, 3-3 adjusting block, 3-4 flange coupling, 3-5 three-phase asynchronous drive motor, 3-6 drum gear coupling, speed reducer 3-7;

[0031] 5-1 driven support seat, 5-2 four stud vertical bearing seat, 5-3 transmission shaft, 5-4 8-toothed chain wheel, 5-5 cover plate;

[0032] 6-1 four stud vertical bearing seat, 6-2 self-aligning roller bearing, 6-3 positioning ring, 6-4 locking sleeve;

[0033] 8-1 support main seat, 8-2 connecting bottom plate, 8-3 vertical support bracket left, 8-4 locking flange, 8-5 locking nut, 8-6 adjusting bolt, 8-7 drive ring, 8-8 driven chain wheel, 8-9 special spacer sleeve, 8-10 top connecting plate, 8-11 auxiliary slide rail, 8-12 vertical support bracket right, 8-13 high-strength cover plate;

[0034] 9-1 longitudinal channel steel, 9-2 transverse channel steel, fixing plate 9-3, 9-4 adjusting bolt, 9-5 welding ground foot. DETAILED DESCRIPTION

[0035] The technical scheme of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0036] The utility model provides a kind of plane segmented automatic conveying chain device, referring to specifically Figure 1The difference between the prior art and the plane segment automatic conveying chain device is that two conveying chains are arranged in parallel, driving devices are arranged between the two conveying chains, driving main devices are arranged at one end of the two conveying chains and connected with the driving devices, and driving locking devices are arranged at the other end of the two conveying chains; and driving main bending entering mechanisms, driving secondary bending entering mechanisms and multifunctional pushers are sequentially arranged on the two conveying chains.

[0037] In the implementation, the device can realize complete synchronization of the two conveying chains, avoid accidents caused by inconsistent conveying beats, and be suitable for thin plates with different thicknesses, specifications and sizes, so that the device has wide application range and stable conveying chain in the whole conveying process, and the service life of the device is prolonged.

[0038] Embodiment 1

[0039] In the implementation, the plane segment automatic conveying chain device includes two conveying chains arranged in parallel, driving devices are arranged between the two conveying chains, driving main devices are arranged at one end of the two conveying chains and connected with the driving devices, and driving locking devices are arranged at the other end of the two conveying chains; and driving main bending entering mechanisms, driving secondary bending entering mechanisms and multifunctional pushers are sequentially arranged on the two conveying chains. The driving device 1 is welded and fixed with the embedded part of the pit; the driving main device 2 is connected with the embedded part of the pit after the horizontal and height directions are adjusted after installation based on the calibration of the driving device 1; the driving locking device 3 is welded and fixed with the embedded part of the pit; the driving main bending entering mechanism 4 and the driving secondary bending entering mechanism 5 are welded with the embedded part of the ground through matched welding feet; and the multifunctional pusher 6 is fixed on the driving chain through buckling.

[0040] Specifically, the driving device includes a driving main seat, a speed reducer and a three-phase asynchronous driving motor are arranged on the driving main seat, a drum-shaped tooth coupling is arranged between the speed reducer and the three-phase asynchronous driving motor, flange couplings are arranged on the two sides of the three-phase asynchronous driving motor; a speed reducer mounting mechanism is arranged between the speed reducer and the driving main seat, reinforcing plate ribs are arranged on the four edges of the driving main seat, and two protruding adjusting blocks are arranged at one end of the driving main seat. The driving main device includes a driving support seat, a four-screw column vertical bearing seat assembly is arranged on the driving support seat, a transmission shaft is arranged on the four-screw column vertical bearing seat assembly, an 8-tooth chain wheel is arranged at one end of the transmission shaft, and a cover plate is arranged at one end of the 8-tooth chain wheel to limit the position.

[0041] Further, the four-screw column vertical bearing seat assembly includes a four-screw column vertical bearing seat, a self-aligning roller bearing is arranged in the four-screw column vertical bearing seat, a positioning ring is arranged on the side of the self-aligning roller bearing to limit the axial position, and a locking sleeve is arranged on the outside of the self-aligning roller bearing to limit the radial position.

[0042] The driven locking device comprises a support main seat, a connecting bottom plate arranged on the support main seat, two support frames arranged side by side on the connecting bottom plate, a driven sprocket arranged between the two support frames, a locking flange arranged at one end of each of the two support frames, an adjusting bolt arranged at one side of the locking flange, a locking nut arranged between the locking flange and the adjusting bolt, and a driving ring arranged on the adjusting bolt. The support frame is linked by a top connecting plate, a vertical left side support bracket and a vertical right side support bracket. Two auxiliary sliding rails are arranged in each support frame. One of the two auxiliary sliding rails is connected with the connecting bottom plate, and the other is connected with the top connecting plate. The driven sprocket is connected with a special spacer. The special spacer is provided with a high-strength cover plate for limiting axial movement.

[0043] The driven main curved entering mechanism comprises a transverse channel steel and a longitudinal channel steel vertically linked with the transverse channel steel. The transverse channel steel is connected with a fixing plate and a plurality of groups of adjusting foot structures. Each adjusting foot structure comprises an adjusting bolt. Symmetrically arranged welding feet are connected to the two sides of the adjusting bolt. The transverse steel channel has two roots. The two transverse steel channels are arranged in parallel at one end. An included angle is arranged between the two transverse steel channels at the other end. The included angle is 15-40 degrees.

[0044] The multi-function pusher comprises a side edge 2-1, a bottom edge 2-2 and a long straight blocking edge 2-3. The angle between the long straight blocking edge and the horizontal plane is 75-85 degrees. The bottom edge is provided with two positioning clamping holes 2-4.

[0045] Embodiment 2

[0046] In this embodiment, the planar segmented automatic conveying chain device comprises two parallel conveying chains. A driving device is arranged between the two conveying chains. A driven main device is arranged at one end of each of the two conveying chains and connected with the driving device. A driven locking device is arranged at the other end of each of the two conveying chains. A driven main curved entering mechanism, a driven secondary curved entering mechanism and a multi-function pusher are sequentially arranged on the two conveying chains. The driving device 1 is welded and fixed with the embedded part of the pit. The driven main device 2 is connected with the embedded part of the pit after the driving device 1 is installed, adjusted horizontally and in the height direction. The driven locking device 3 is welded and fixed with the embedded part of the pit. The driven main curved entering mechanism 4 and the driven secondary curved entering mechanism 5 are welded with the embedded part of the ground through welding feet. The multi-function pusher 6 is fixed on the driving chain through buckling.

[0047] The driving device 1 comprises a driving main seat 3-1, a speed reducer mounting mechanism 3-2, an adjusting block 3-3, a flange coupling 3-4, a three-phase asynchronous driving motor 3-5, a drum-shaped tooth coupling 3-6 and a speed reducer 3-7. The driving main seat has six reinforcing rib plates on four sides. One is to improve the strength and stability of the whole main seat, and the other is to provide a force point for adjusting the whole mechanism by the adjusting block to ensure safety and efficiency during debugging.

[0048] As Figure 2 The speed reducer mounting mechanism 3-2 is made of hollow square steel with a size of 6x100x100mm as a support main body, and 15mm steel plates are welded on the upper and lower parts, and is connected with the driving main seat 3-1 through bolts; the adjusting block 3-3 is composed of a support block main body, a high-strength nut and a high-strength bolt, and when the whole is adjusted, the high-strength bolt is used to limit and adjust the whole driving device 1, and after the specific position is determined, the high-strength nut is locked and the driving device 1 is welded into the pit; the flange coupling 3-4 is connected with the three-phase asynchronous driving motor 3-5 through a key; the three-phase asynchronous driving motor 3-5 is connected with the speed reducer 3-7 through a drum gear coupling 3-6 and a high-strength key.

[0049] As Figure 3 It is a structural schematic view of the driven main device 2, mainly including a driven support seat 5-1, a four-screw column vertical bearing seat assembly 5-2, a transmission shaft 5-3, an 8-toothed sprocket 5-4 and a cover plate 5-5. The driven support seat 5-1 is a hollow main seat spliced by 18mm thick steel plates, which not only ensures the bearing capacity but also reduces the weight of the main body, and two reinforcing bottom plates are welded when the bearing seat is installed; the four-screw column vertical bearing seat assembly 5-2 is fixed on the driven support seat 5-1 through bolts; the transmission shaft 5-3 is connected with the four-screw column vertical bearing seat assembly 5-2 through a key and is fastened by a locking sleeve inside the four-screw column vertical bearing seat assembly 5-2; the 8-toothed sprocket 5-4 is connected with the transmission shaft 5-3 through a high-strength key and is limited in the horizontal direction by the cover plate 5-5. The 8-toothed sprocket 5-4 is designed as a hollow protrusion at both ends, which not only enhances the original strength of the 8-toothed sprocket and ensures the stability of the sprocket itself during high-speed operation, but also increases the fastening force between the 8-toothed sprocket and the transmission shaft 5-3, so as to ensure that the transmission shaft 5-3 can minimize the loss of energy consumption when transmitting the acting force.

[0050] As Figure 4 It is a sectional view of the four-screw column vertical bearing seat assembly 5-2, including a four-screw column vertical bearing seat 6-1, a self-aligning roller bearing 6-2, a positioning ring 6-3 and a locking sleeve 6-4. The four-screw column vertical bearing seat 6-1 is made of 45# steel quenching and tempering, which has excellent strength and durability; the self-aligning roller bearing 6-2 is installed inside the four-screw column vertical bearing seat 6-1 and is limited in the axial direction by the positioning ring 6-3; the locking sleeve 6-4 limits the radial direction of the self-aligning roller bearing 6-2, which ensures the stability of the four-screw column vertical bearing seat 6-1 during high-speed operation.

[0051] As Figure 5The driven locking device 3 is shown in the schematic diagram of the mechanism, including the support main seat 8-1, the connecting bottom plate 8-2, the vertical support bracket left 8-3, the locking flange 8-4, the locking nut 8-5, the adjusting bolt 8-6, the driving ring 8-7, the driven sprocket 8-8, the special spacer 8-9, the top connecting plate 8-10, the auxiliary slide rail 8-11, the vertical support bracket right 8-12 and the end face high-strength cover plate 8-13. The support main seat 8-1 is welded by 16mm plate material, and 12 triangular reinforcing ribs are welded around to ensure the rigidity; the connecting bottom plate 8-2 is connected with the support main seat 8-1 by bolts; the vertical support bracket left 8-3 and the vertical support bracket right 8-12 are fixed on the connecting bottom plate 8-2 by bolts; the locking flange 8-4 is connected with the vertical support bracket left 8-3 by bolts, which increases the locking force and plays a guiding role; the locking nut 8-5 is connected with the adjusting bolt 8-6 through its own thread; the adjusting bolt 8-6 is connected with the vertical support bracket left 8-3, the locking flange 8-4, the locking nut 8-5 and the driving ring 8-7 respectively, and the position of the bearing seat is adjusted by rotating the thread, so as to adjust the position of the tensioner, so that the chain runs more smoothly and smoothly; the driven sprocket 8-8 and the special spacer 8-9 are connected with the bearing seat through a high-strength connecting shaft, and the axial movement is limited by the high-strength cover plate 8-13; the top connecting plate 8-10 is connected with the vertical support bracket left 8-3 and the vertical support bracket right 8-12 respectively by bolts; the two upper and lower auxiliary slide rails 8-11 are connected with the connecting bottom plate 8-2 and the top connecting plate 8-10 respectively, which plays a guiding and limiting role for the bearing seat.

[0052] As shown in Figure 6 The driven main bending entry mechanism 4 is shown in the schematic diagram of the mechanism, which includes a transverse channel steel 9-2 and a longitudinal channel steel 9-1 vertically connected with the transverse channel steel, the transverse channel steel is connected with a fixed plate 9-3 and a plurality of adjusting foot structures, each adjusting foot structure includes an adjusting bolt 9-4, and the two sides of the adjusting bolt are respectively connected with symmetrically arranged matching welding feet 9-5; the transverse steel groove has two roots, one end of the two transverse steel grooves is arranged in parallel, and an included angle is arranged between the other two transverse steel grooves, and the degree of the included angle is 15-40 degrees.

[0053] The connecting fixed plate 9-3 is spliced at the connecting position of the two transverse channel steels 9-2, which plays a fixing role and ensures the horizontal degree and straightness; the adjusting bolt 9-4 is convenient to adjust during installation; the transverse channel steel 9-2 is made into a curved arc shape when the chain enters the sprocket, which can facilitate the perfect meshing of the chain with the sprocket without interference, so that the chain does not rub and jam during high-speed movement, and ensures the orderly work of the conveying chain. The driven secondary bending entry mechanism 5 and the driven main bending entry mechanism 4 are similar in mechanism.

[0054] As shown in Figure 7The mechanism schematic view of the multifunctional pusher 6 is shown, the multifunctional pusher 6 is quenched and blackened by 45# steel, two hole positions at the bottom and the conveying chain of the chain match and are locked, can follow the movement of the chain when the chain moves, thereby play the role of transporting the sheet, the long straight flange of the multifunctional pusher 6 is made into 83° bevel, through simulation analysis can know this design can effectively convert the force generated by the chain into thrust to a greater extent and reduce the force loss in the process, at the same time, the center is equidistantly hollowed out, not only can make the pusher more easily release the internal stress when making, ensure the accuracy of each size, but also can reduce the weight of the pusher, ensure the maximum force transmission.

[0055] The above is the further detailed description of the utility model in combination with the specific preferred embodiment, and cannot be determined that the specific implementation of the utility model is limited to the above description. For ordinary skilled person in the art to which the utility model belongs, on the premise of not departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. A planar segmental automatic conveying chain device, characterized by: The automatic conveying chain device comprises two parallel conveying chains, a driving device arranged between the two conveying chains, a driven main device arranged at one end of each conveying chain and connected with the driving device, and a driven locking device arranged at the other end of each conveying chain.

2. A flat section automatic conveying chain device according to claim 1, characterized in that: The driving device comprises a driving main seat, a speed reducer and a three-phase asynchronous driving motor arranged on the driving main seat, a drum-shaped tooth coupling arranged between the speed reducer and the three-phase asynchronous driving motor, and flange couplings arranged on both sides of the three-phase asynchronous driving motor.

3. A flat section automatic conveying chain device according to claim 1, characterized in that: The driven main device comprises a driven support seat, a four-screw-column vertical bearing seat assembly arranged on the driven support seat, a transmission shaft arranged on the four-screw-column vertical bearing seat assembly, an 8-toothed chain wheel arranged at one end of the transmission shaft, and a cover plate arranged at one end of the 8-toothed chain wheel.

4. A flat section automatic conveying chain device according to claim 3, characterized in that: The four-screw-column vertical bearing seat assembly comprises a four-screw-column vertical bearing seat, a self-aligning roller bearing arranged in the four-screw-column vertical bearing seat, a positioning ring arranged on the side of the self-aligning roller bearing to limit the axial direction, and a locking sleeve arranged on the outside of the self-aligning roller bearing to limit the radial direction.

5. A flat section automatic conveying chain device according to claim 1, characterized in that: The driven locking device comprises a support main seat, a connecting bottom plate arranged on the support main seat, two support frames arranged side by side on the connecting bottom plate, a driven chain wheel arranged between the two support frames, a locking flange arranged at one end of each support frame, an adjusting bolt arranged on one side of the locking flange, and a driving ring connected between the locking flange and the adjusting bolt.

6. A flat section automatic conveying chain device according to claim 5, characterized in that: The support frame is linked by a top connecting plate, a vertical left side support bracket and a vertical right side support bracket, and two auxiliary slide rails are arranged in each support frame, one of which is connected with the connecting bottom plate and the other of which is connected with the top connecting plate.

7. A flat section automatic conveying chain device according to claim 1, characterized in that: The driven main curved entering mechanism comprises a horizontal channel steel and a vertical channel steel linked perpendicularly with the horizontal channel steel, a fixed plate and a plurality of adjusting foot structures connected with the horizontal channel steel, each adjusting foot structure comprising an adjusting bolt, and symmetrically arranged welding feet connected with both sides of the adjusting bolt.

8. A flat section automatic conveying chain device according to claim 1, characterized in that: The multi-function pusher comprises a side edge, a bottom edge and a long straight blocking edge, the angle between the long straight blocking edge and the horizontal plane is 75-85 degrees, and the bottom edge is provided with two positioning clamping holes.

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