Single-glass photovoltaic panel back plate removing device

Abstract

The invention discloses a device for removing a back plate of a single-glass photovoltaic panel. The device comprises a bottom plate; the pressing plate is arranged above the bottom plate; the bottoms of the two side supporting plates are fixedly arranged at the two ends of the pressing plate; the top plate is arranged above the side supporting plates in a supporting manner; the two ends of the spiral cutter shaft are rotatably supported at the bottom of the top plate respectively; the two adjusting screws are arranged at the two ends of the top plate respectively, and one end of each adjusting screw penetrates through the top plate and then makes contact with the top of the corresponding side supporting plate; one ends of the four guide shafts penetrate through the top plate and are in threaded connection with the two sides of the tops of the two side supporting plates respectively; four supporting columns; the four springs are correspondingly arranged at the upper parts of the supporting columns respectively; and the driving mechanism is arranged on the top plate. The photovoltaic panel is cut through the spiral cutter shaft, and the photovoltaic panel is automatically pressed in the cutting process.

Description

Technical Field

[0001] The present invention relates to a device for removing the backplane of a single-glass photovoltaic panel, belonging to the technical field of photovoltaic panel recycling equipment. Background Art

[0002] In the process of recycling waste photovoltaic panels, the removal mechanism is one of the key components. It needs to efficiently and safely remove the backplane for subsequent material separation and purification. There are still many deficiencies in the removal technologies currently used in the field of photovoltaic panel recycling: the backplane removal is incomplete, resulting in problems such as low purity of recycled materials and equipment wear; overly aggressive removal will cause damage to the photovoltaic panel. By reasonably designing the removal mechanism to achieve precise and appropriate backplane peeling, not only can the recycling purity of subsequent materials be significantly improved, but it also plays a certain role in environmental protection. Summary of the Invention

[0003] The present invention designs and develops a device for removing the backplane of a single-glass photovoltaic panel, which cuts the photovoltaic panel through a spiral cutter shaft and automatically compresses the photovoltaic panel during the cutting process.

[0004] Another object of the present invention: to be able to adjust the distance between the pressing plate and the spiral cutter shaft.

[0005] The technical solution provided by the present invention is as follows:

[0006] A device for removing the backplane of a single-glass photovoltaic panel, comprising:

[0007] A bottom plate;

[0008] A pressing plate, which is supported above the bottom plate, and a cutting groove is longitudinally formed on the pressing plate;

[0009] Two side support plates, the bottoms of which are fixedly arranged at both ends of the pressing plate;

[0010] A top plate, which is supported above the side support plates;

[0011] A spiral cutter shaft, the two ends of which are respectively rotatably supported at the bottom of the top plate;

[0012] Two adjusting screws, which are respectively arranged at both ends of the top plate, and one end of each adjusting screw passes through the top plate and abuts against the top of the side support plate;

[0013] Four guide shafts, one end of each of which passes through the top plate and is respectively threadedly connected to both sides of the top of the two side support plates;

[0014] Four support columns, one end of each of which passes through the four corners of the top plate and is fixedly arranged on the bottom plate;

[0015] Four springs, which are respectively arranged at the upper part of the strut, and one end of each spring abuts against the top plate;

[0016] A driving mechanism, which is arranged on the top plate; one end of the spiral cutter shaft passes through the side support plate and is connected to the output end of the driving mechanism.

[0017] Preferably, it further includes:

[0018] A dust-proof cover, which is arranged between the top plate and the pressing plate, and the bottom of the dust-proof cover is fixed to the pressing plate;

[0019] At least two chip suction cylinders, one end of each of which passes through the top plate and is communicated with the dust-proof cover.

[0020] Preferably, it further includes:

[0021] Two pedestal bearings, which are fixedly arranged on the top plate, and both ends of the spiral cutter shaft are correspondingly arranged on the pedestal bearings.

[0022] Preferably, it further includes:

[0023] Four adjusting rod fixing seats, which are respectively fixedly arranged on the top plate and are located on both sides of the top plate;

[0024] Four adjusting rods, one end of each of which is correspondingly and fixedly arranged in the adjusting rod fixing seat;

[0025] A motor seat, the four corners of which pass through and are arranged on the adjusting rods;

[0026] Four groups of opposed nuts, which are respectively correspondingly arranged on the four adjusting rods;

[0027] Wherein, each group of opposed nuts consists of two and is respectively located at the top and bottom of the motor seat for positioning the motor seat.

[0028] Preferably, the driving mechanism includes:

[0029] A rotary motor, which is fixedly arranged on the motor seat;

[0030] A first synchronous belt pulley, which is connected to the output end of the rotary motor;

[0031] A second synchronous belt pulley, which is arranged at one end of the spiral cutter shaft and is located outside the side support plate;

[0032] A synchronous belt, which is correspondingly arranged on the first synchronous belt pulley and the second synchronous belt pulley.

[0033] Preferably, it further includes:

[0034] Four pillar fixing seats, which are respectively and fixedly arranged at the four corners of the bottom plate,

[0035] Four first bushings, one end of which passes through and is arranged on the top plate;

[0036] Four fixing rings, which are arranged on the pillars and used to fix the first bushings;

[0037] Four first flat washers, which are arranged on the first bushings;

[0038] Wherein, one end of the pillar passes through the flat washer, the first bushing, and the fixing ring in sequence and is arranged in the pillar fixing seat;

[0039] Four upper adjusting plates, which are arranged at the other end of the pillars;

[0040] Four first cylindrical screws, one end of which passes through the top of the upper adjusting plate and is threadedly connected to the pillar;

[0041] One end of the spring abuts against the first flat washer, and the other end abuts against the bottom of the upper adjusting plate. The up and down movement of the upper adjusting plate is adjusted by the first adjusting screw to adjust the elastic force of the spring.

[0042] Preferably, it further includes:

[0043] A second bushing, which is arranged on the top plate;

[0044] A second flat washer, which is arranged on the second bushing;

[0045] One end of the guide shaft passes through the second bushing and the second flat washer in sequence and is embedded in the guide shaft threaded hole of the side support plate. An adjusting block is arranged at the other end of the guide shaft;

[0046] A second cylindrical screw, one end of which passes through the adjusting block and is threadedly connected to the other end of the guide shaft.

[0047] Preferably, both sides of the cutting groove have an inclined angle for cooperating with the spiral cutter shaft; A plurality of empty grooves are also arranged along the transverse direction on both sides of the cutting groove.

[0048] Preferably, both the first bushing and the second bushing are thrust type oil-free bushings, and both the first flat washer and the second flat washer are chamfered flat washers.

[0049] Preferably, the adjusting screw is an internal hexagonal screw with a cylindrical head, and a hexagonal nut is matched and arranged thereon.

[0050] Advantages of the present invention: The single-glass photovoltaic backplane removal machine device provided by the present invention includes a rotating motor fixing device, a floating pressing device, a pressing plate - cutter shaft spacing adjustment device, a backplane removal device, a dust cover, and a chip suction port. The tension of the synchronous belt is achieved by adjusting the opposing nuts on the rotating motor fixing device. The floating pressing device uses a spring to achieve the up and down floating of the backplane removal device, thereby realizing the automatic pressing of the photovoltaic panel. This pressing method can not only automatically adjust the pressing force, achieve the automatic pressing of the photovoltaic panel, but also adapt to photovoltaic modules of different thicknesses, make the pressing force uniform, avoid damaging the photovoltaic panel, and the spring pressing force is stable, capable of providing a continuous clamping force to ensure the stability of the backplane during the removal process.

[0051] The pressing plate - cutter shaft spacing adjustment device uses the cooperation of pushing down the screw and pulling up the adjusting block to avoid the limitation of single-direction adjustment. At the same time, it realizes the adjustment of the spacing between the pressing plate and the spiral cutter shaft, and controls the milling amount of the backplane of the waste photovoltaic panel by the rotating cutter shaft. Moreover, due to the existence of the threaded fit between the screw and the adjusting block, the moving amount can be precisely controlled, thereby achieving high-precision backplane removal. The backplane of the waste photovoltaic panel is milled by rotating the spiral cutter shaft, and the backplane is completely broken and then removed by suction. The chip suction port on the upper part of the dust cover can suck out impurities such as chips and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic structural diagram of the single-glass photovoltaic panel backplane removal device described in the present invention.

[0053] Figure 2 It is an exploded view of the single-glass photovoltaic panel backplane removal device described in the present invention.

[0054] Figure 3 It is a schematic structural diagram of the rotating motor fixing mechanism of the single-glass photovoltaic panel backplane removal device described in the present invention.

[0055] Figure 4 It is a schematic structural diagram of the floating pressing mechanism of the single-glass photovoltaic panel backplane removal device described in the present invention.

[0056] Figure 5 It is a schematic structural diagram of the pressing plate - cutter shaft spacing adjustment device of the single-glass photovoltaic panel backplane removal device described in the present invention.

[0057] Figure 6 It is a schematic structural diagram of the backplane removal mechanism of the single-glass photovoltaic panel backplane removal device described in the present invention.

[0058] Figure 7 It is a schematic structural diagram of the pressing plate of the single-glass photovoltaic panel backplane removal device described in the present invention.

[0059] Figure 8This is a schematic cross-sectional view of the backplane removing mechanism of the single-glass photovoltaic panel backplane removing device according to the present invention.

[0060] Figure 9 This is a schematic cross-sectional view of some components in the rotating pressing plate - cutter shaft spacing adjusting mechanism according to the present invention.

[0061] Figure 10 This is a schematic structural view of some components in the floating pressing mechanism of the single-glass photovoltaic panel backplane removing device according to the present invention. Detailed implementation manners

[0062] The following further elaborates the present invention in conjunction with the accompanying drawings so that those skilled in the art can implement it with reference to the text of the specification.

[0063] As Figures 1-10 shown, the present invention provides a single-glass photovoltaic panel backplane removing device, including a rotating motor fixing mechanism 1, a rotating motor 11, a first synchronous pulley 12, a motor base 13, an adjusting rod fixing seat 14, an opposing nut 15, an adjusting rod 16, a floating pressing mechanism 2, an upper adjusting plate 21, a spring 22, a chamfered flat washer 23, a first bushing 24, a fixing ring 25, a pillar fixing seat 26, a pillar 27, a pressing plate - cutter shaft spacing adjusting mechanism 3, an adjusting screw 31, a hexagon nut 32, an adjusting block 33, a guide shaft 34, a flat washer 35, a second bushing 36, a backplane removing mechanism 4, a second synchronous pulley 41, a bottom plate 42, a side support plate 43, a pressing plate 44, a spiral cutter shaft 45, a top plate 46, a pedestal bearing 47, a dust cover 5, and a chip suction port 6.

[0064] As Figures 1-2 shown, the rotating motor fixing mechanism 1 is located at the uppermost part of the entire removing device and is fixedly connected to the motor base 13 by bolts. The floating pressing mechanism 2 uses a spring 22 to automatically press the photovoltaic panel; the pressing plate - cutter shaft spacing adjusting device 3 uses the cooperation of an adjusting screw 31 and an adjusting block 33 to adjust the position of the pressing plate 44. The backplane removing device 4 is the operating component of the entire removing mechanism. After the floating pressing device 2 presses the photovoltaic panel and the pressing plate - cutter shaft spacing adjusting device 3 adjusts the distance between the pressing plate 44 and the spiral cutter shaft 45, the backplane is removed by milling using the rotation of the spiral cutter shaft 45. The dust cover 5 surrounds the spiral cutter shaft 45, and there is a chip suction port 6 at the upper part, which can not only prevent the entry of dust and impurities and protect key components such as the spiral cutter shaft 45, but also prevent dust pollution generated during the process of the spiral cutter shaft 45 cutting the backplane of the waste photovoltaic panel.

[0065] As Figure 6As shown in the figure, the backplane removing mechanism 4 includes: a second synchronous pulley 41, a bottom plate 42, side support plates 43, a pressing plate 44, a spiral cutter shaft 45, a top plate 46, and a pedestal bearing 47. The bottom plate 42 is placed at a predetermined working position. The pressing plate 44 is arranged above the bottom plate 42, and the pressing plate 44 is arranged at the bottom of the dust-proof cover 5 and fixed with bolts. The bottoms of the two side support plates 43 are respectively and fixedly arranged at both ends of the pressing plate 44. The top plate 46 is located above the side support plates 43. The two pedestal bearings 47 are respectively and fixedly arranged at both bottom ends of the top plate 46. Both ends of the spiral cutter shaft 45 are respectively installed on the pedestal bearings 47. The top plate 46 suspends the side support plates 43 and the pressing plate 44 through a guide shaft 34, so as to form an accommodating space between the pressing plate 44 and the bottom plate 42 for placing a photovoltaic panel. At the same time, on the pressing plate 44, a cutting groove is longitudinally formed, and both sides of the cutting groove have an inclined angle for cooperating with the spiral cutter shaft 45 to cut the photovoltaic panel. On both sides of the cutting groove, a plurality of equally spaced empty grooves are also transversely arranged, serving as chip outlets for the photovoltaic backplane after being cut into pieces.

[0066] As Figure 5 shown in the figure, the pressing plate-cutter shaft spacing adjusting mechanism 3 includes: adjusting screws 31, hex nuts 32, adjusting blocks 33, guide shafts 34, flat washers 35, second bushings 36, and second setscrews 37. In the present invention, as a preference, the adjusting screws 31 are internal hexagon socket head cap screws, and the number of adjusting screws is two. The number of adjusting blocks 33, guide shafts 34, flat washers 35, second bushings 36, and second setscrews 37 is four. The two adjusting screws 31 are respectively arranged at both ends of the top plate 46. The adjusting screws 31 pass through the corresponding holes of the top plate 46 and press against the side support plates 43. At the same time, the adjusting screws 31 are tightened on the top plate 46 through the hex nuts 32, so as to ensure that the adjusting screws 31 firmly press against the side support plates 43. By adjusting the depth change of the screw rods of the adjusting screws 31 screwed into the top plate 46, the side support plates 43 are pushed to move downward, and thus the downward movement of the pressing plate 44 is realized; As [[ID=⑥]] Figure 9 [[ID=⑦]]shown in the figure, the guide shafts 34 have external threads. One end of the four guide shafts 34 passes through the top plate 46 and is respectively threadedly and fixedly connected to both sides of the side support plates 43. The guide shafts 34 are sequentially assembled from top to bottom with: second setscrews 37, adjusting blocks 33, flat washers 35, second bushings 36, and second cylinder bolts 37. There is a gap between the adjusting blocks 33 and the guide shafts 34, and the guide shafts can move up and down along the adjusting blocks 33. On the upper part of the guide shafts 34, guide shaft threaded holes are formed. At the same time, on the adjusting blocks 33, light holes coaxial with the guide shaft threaded holes are formed. The second setscrews 37 pass through the adjusting blocks 33 and are matingly connected to the guide shaft threaded holes. The upward movement of the guide shafts 34 is realized by rotating the second setscrews 37. During work, rotate the second setscrews 37 so that their heads press against the adjusting blocks to lift the guide shafts 34 up. The guide shafts 34 drive the side support plates 43 to move upward, and thus the upward movement of the pressing plate 44 is realized. [[ID=⑧]]

[0067] As shown Figure 4 in the figure, the floating pressing device 2 includes: an upper adjusting plate 21, a spring 22, a chamfered flat washer 23, a first bushing 24, a fixing ring 25, a strut fixing seat 26, a strut 27, and a first round head screw 28. In the present invention, as a preference, the number of the spring 22, the chamfered flat washer 23, the first bushing 24, the fixing ring 25, the strut fixing seat 26, the strut 27, and the first round head screw 28 is four. The four strut fixing seats 26 are fixed at the four corners of the bottom plate 42 by bolts. One end of the strut 27 is fixedly arranged in the strut fixing seat 26. The strut 26 is successively assembled with: the fixing ring 25, the first bushing 24, the chamfered flat washer 23, the spring 22, the upper adjusting plate 21, and the second round head screw 28 from one end to the other end. Among them, the first bushing 24 is arranged on the top plate 46. The other end of the strut 26 passes through the first bushing 24 and is arranged above the top plate 46. The bottom of the first bushing 24 is fixed by the fixing ring 25. The spring 22 is arranged outside the strut 27. The upper adjusting plate 21 is integrally cylindrical and has an opening at one end facing the strut 26. The other end of the strut 26 is arranged in the opening of the upper adjusting plate 21. One end of the first round head screw 28 passes through the upper adjusting plate 21 and is threadedly connected to the other end of the strut 26. One end of the spring 22 abuts against the chamfered flat washer 23, and the other end abuts against the bottom of the upper adjusting plate 21. By rotating the first round head screw 28, the upper adjusting plate 21 moves up and down. When the upper adjusting plate 21 moves downward, it can compress the spring, and the spring force of the spring 22 is adjusted according to the requirements during processing, so that the waste photovoltaic panel reaches the required pressing degree. Therefore, when the waste photovoltaic panel enters the device, the pressure can act on the photovoltaic panel evenly through the spring 22.

[0068] In the present invention, as a preference, both the first round head screw 37 and the second round head screw 28 are hexagon socket head cap screws.

[0069] In the present invention, as a preference, both the first bushing 24 and the second bushing 36 are thrust type oil-free bushings.

[0070] The rotating motor fixing mechanism 1 is arranged on the top plate and includes: a rotating motor 11, a first synchronous pulley 12, a motor base 13, an adjusting rod fixing base 14, a top nut 15, and an adjusting rod 16. On the top plate 46, four adjusting rod fixing bases 14 are fixed by bolts. There are eight top nuts 15, two in each group, which are respectively arranged at the top and bottom of the motor base 13. The motor base 13 is fastened to the adjustment 16, and then the rotating motor 11 is fastened to the motor base 13, thereby completing the fixation of the rotating motor 11. The output shaft of the rotary motor 11 is connected to the first synchronous pulley 12. A through slot is provided in the side support plate 42. One end of the spiral cutter shaft 45 passes through the through slot and is connected to the second synchronous pulley 41. The second synchronous pulley 41 rotates synchronously with the spiral cutter shaft via a flat key. The first synchronous pulley 12 is connected to the second synchronous pulley 41 via a synchronous belt, transmitting power to the spiral cutter shaft. The rotary motor 11 drives the spiral cutter shaft 45 to rotate via a belt drive, allowing the spiral cutter shaft to accurately mill the backplate during rotation, thereby removing the backplate. At the same time, the synchronous belt can be tensioned by adjusting the top nut 15 on the rotary motor fixture 1.

[0071] Working Principle: Before the device operates, the distance between the bottom of the pressure plate 44 and the bottom of the spiral cutter shaft 45 is manually adjusted according to the thickness of the waste photovoltaic panel. This involves rotating the adjustment screw 31 in the pressure plate-cutter shaft spacing adjustment mechanism 3 to push the supported side support plate 43 downward, thereby moving the pressure plate 44 downward. When the side support plate 43 is raised, the adjustment screw 31 is first loosened to press against the side support plate 43 so that there is no restraint above the side support plate. Then, the second cylindrical screw 37 in the pressure plate-cutter shaft spacing adjustment mechanism 3 is rotated to move the guide shaft 34 upward, driving the side support plate 43 upward and moving the pressure plate 44 upward. By adjusting the adjustment screw 31 and the second cylindrical screw 37, the distance between the pressure plate 44 and the spiral cutter shaft 45 is changed, allowing for precise removal of the backing plate. When the waste photovoltaic panels enter the backboard removal mechanism 4, the floating clamping mechanism 2 automatically clamps the waste photovoltaic panels. By rotating the first screw 28 and adjusting the upper adjustment plate 21 to provide a stable spring force, the automatic clamping of the waste photovoltaic panels is ensured. Furthermore, by evenly distributing the springs 22, the clamping force is evenly applied to the waste photovoltaic panels. The rotary motor 11 is activated, driving the spiral cutter shaft 45 to rotate. During this rotation, the backboard is precisely cut, thereby removing the backboard. Finally, during the milling process of the cutter shaft 45, the chip suction port 6 on the upper portion of the dust cover 5 sucks out debris, dust, and other impurities generated during the cutting process, completing the entire backboard removal process.

[0072] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples described herein.

Claims

1. A single-glass photovoltaic panel backplane removal device, characterized in that, Comprising: Bottom plate; Pressing plate, which is supported above the bottom plate, and a cutting groove is longitudinally formed on the pressing plate; Two side support plates, the bottoms of which are fixedly arranged at both ends of the pressing plate; Top plate, which is supported above the side support plates; Spiral cutter shaft, the two ends of which are respectively rotatably supported at the bottom of the top plate; Two adjusting screws, which are respectively arranged at both ends of the top plate, and one end of the adjusting screw passes through the top plate and abuts against the top of the side support plate; Four guide shafts, one end of which passes through the top plate and is respectively threadedly connected to both sides of the top of the two side support plates; Four support columns, one end of each of which passes through the four corners of the top plate and is fixedly arranged on the bottom plate; Four springs, which are respectively arranged corresponding to the upper parts of the support columns, and one end of the spring abuts against the top plate; Driving mechanism, which is arranged on the top plate; one end of the spiral cutter shaft passes through the side support plate and is connected to the output end of the driving mechanism.

2. The single-glass photovoltaic panel backplane removing device according to claim 1, wherein Further comprising: Dust-proof cover, which is arranged between the top plate and the pressing plate, and the bottom of the dust-proof cover is fixed to the pressing plate; At least two chip suction cylinders, one end of each of which passes through the top plate and is communicated with the dust-proof cover.

3. The single-glass PV panel backplane removing device according to claim 2, wherein, Further comprising: Two pedestal bearings, which are fixedly arranged on the top plate, and the two ends of the spiral cutter shaft are correspondingly arranged on the pedestal bearings.

4. The single-glass photovoltaic panel backplane removal device according to claim 3, wherein, Further comprising: Four adjusting rod fixing seats, which are respectively fixedly arranged on the top plate and are located on both sides of the top plate; Four adjusting rods, one end of each of which is correspondingly and fixedly arranged in the adjusting rod fixing seat; Motor seat, the four corners of which pass through and are arranged on the adjusting rods; Four groups of opposed nuts, which are respectively correspondingly arranged on the four adjusting rods; Wherein, each group of opposed nuts has two, and is respectively located at the top and bottom of the motor seat for positioning the motor seat.

5. The single-glass photovoltaic panel backplane removal device according to claim 4, wherein, The driving mechanism includes: Rotary motor, which is fixedly arranged on the motor seat; First synchronous pulley, which connects the output end of the rotary motor; Second synchronous pulley, which is arranged at one end of the spiral cutter shaft and is located outside the side support plate; Synchronous belt, which is correspondingly arranged on the first synchronous pulley and the second synchronous pulley.

6. The single-glass photovoltaic panel backplane removal device according to claim 5, wherein, Further comprising: Four support column fixing seats, which are respectively fixedly arranged at the four corners of the bottom plate, Four first bushings, one end of each of which passes through and is arranged on the top plate; Four fixing rings, which are arranged on the support columns for fixing the first bushings; Four first flat washers, which are arranged on the first bushings; Wherein, one end of the support column passes through the flat washer, the first bushing and the fixing ring in sequence and is arranged in the support column fixing seat; Four upper adjusting plates, which are arranged at the other end of the support column; Four first cylindrical screws, one end of each of which passes through the top of the upper adjusting plate and is threadedly connected to the support column; One end of the spring abuts against the first flat washer, and the other end abuts against the bottom of the upper adjusting plate. The up and down movement of the upper adjusting plate is adjusted by the first adjusting screw to adjust the elastic force of the spring.

7. The single-glass photovoltaic panel backplane removing device according to claim 6, wherein Further comprising: Second bushing, which is arranged on the top plate; Second flat washer, which is arranged on the second bushing; One end of the guide shaft sequentially passes through the second bushing and the second flat washer and is then embedded in the guide shaft threaded hole of the side support plate, and an adjustment block is provided at the other end of the guide shaft; A second cylindrical screw, one end of which passes through the adjustment block and is threadedly connected to the other end of the guide shaft.

8. The single-glass photovoltaic panel backplane removing device according to claim 7, characterized in that, Both sides of the cutting groove have an inclined angle for cooperating with the spiral cutter shaft; a plurality of empty grooves are further arranged along the transverse direction on both sides of the cutting groove.

9. The single-glass photovoltaic panel backplane removing device according to claim 8, characterized in that, Both the first bushing and the second bushing are thrust-type oil-free bushings, and both the first flat washer and the second flat washer are chamfered flat washers.

10. The single-glass photovoltaic panel backplane removing device according to claim 9, wherein, The adjusting screw is an internal hexagonal screw with a cylindrical head, and a hexagonal nut is matched and arranged thereon.

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