Cleaning mechanism suitable for corners of photovoltaic module

Abstract

The utility model discloses a cleaning mechanism suitable for corners of a photovoltaic module, which belongs to the technical field of photovoltaic module production and comprises a frame and a cleaning module arranged on the frame. Wherein the cleaning assembly comprises a first action unit, a side face cleaning mechanism and a lower portion cleaning mechanism, the first action unit comprises a mounting base, a first driving element and a driving connecting plate, the mounting base is fixedly arranged on the rack, the first driving element is fixedly arranged on the mounting base, and the output end of the first driving element is fixedly connected with the driving connecting plate; the driving connecting plate comprises a transverse rod and a longitudinal rod which is connected with the end of the transverse rod and is perpendicular to the transverse rod, the lower portion cleaning mechanism is fixedly arranged on the transverse rod, and the side face cleaning mechanism is fixedly arranged on the longitudinal rod. According to the cleaning mechanism disclosed by the utility model, the residual glue at the corner part of the photovoltaic module is automatically cleaned, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component production, in particular to a cleaning mechanism suitable for the corners of photovoltaic components. Background Art

[0002] Photovoltaic modules are devices that can convert solar energy into electrical energy. They are made of front glass, front encapsulation film, photovoltaic cell string, back encapsulation film and backboard, which are stacked in sequence and laminated to obtain a laminate, and frames are installed around the laminate. The corner of the photovoltaic module is a 90-degree angle area formed by the combination of the long frame and the short frame through the mortise and tenon structure. Among them, both the long frame and the short frame have a glue groove. When installing the frame, inject sealant into the glue groove to fix the long and short frames with the sealant.

[0003] During the assembly of the long and short side frames, the encapsulation glue squeezed out when the laminate enters the frame glue groove overflows to the front of the frame corner, which is called residual glue. In the current existing automation technology, there is no technology or machinery that can control the overflow of glue or clean the encapsulation glue at the corner of the component. After the glue is rubbed onto the glass surface through the contact conveyor belt in the later process, it will cause batch glass surface contamination and needs to be cleaned. Therefore, after the framing process is completed, the residual glue at the corner needs to be cleaned to avoid a series of subsequent abnormal problems. Utility Model Content

[0004] In view of the above analysis, an embodiment of the utility model aims to provide a cleaning mechanism suitable for the corners of photovoltaic modules, so as to solve the problem of personnel manually cleaning the overflow of glue at the corners of modules.

[0005] On the one hand, the utility model provides a cleaning mechanism suitable for the corner of a photovoltaic module, comprising a frame and a cleaning assembly;

[0006] The rack includes a photovoltaic component placement platform and a cleaning component fixing frame fixedly arranged on the photovoltaic component placement platform;

[0007] The cleaning component includes a first action unit, a side cleaning mechanism and a lower cleaning mechanism; the first action unit includes a mounting seat, a first driving element and a driving connecting plate, the mounting seat is fixedly arranged on the cleaning component fixing frame, the first driving element is fixedly arranged on the mounting seat, and the output end of the first driving element is fixedly connected to the driving connecting plate; the driving connecting plate includes a cross bar and a longitudinal bar connected to and perpendicular to the end of the cross bar, the lower cleaning mechanism is fixedly arranged on the cross bar, and the side cleaning mechanism is fixedly arranged on the longitudinal bar.

[0008] Furthermore, the side cleaning mechanism includes: a second action unit, a buffer unit and a first fixed unit, the second action unit is fixedly arranged on the longitudinal rod, the output end of the second action unit is fixedly connected to one end of the buffer unit, the other end of the buffer unit is fixedly connected to the first fixed unit, and the first fixed unit is detachably provided with a cleaning part.

[0009] Furthermore, the buffer unit includes an L-shaped vertical plate, a fixed rod, a linear bearing and a spring; one end of the vertical plate extends horizontally and is fixedly arranged at the output end of the second action unit; the other end of the vertical plate extends vertically and is provided with a through hole, and the linear bearing is fixedly arranged in the through hole; the first end of the fixed rod passes through the linear bearing and the through hole, and the threaded section of the second end of the fixed rod is fixedly connected to the first fixed unit; the spring is sleeved on the fixed rod, one end of the spring abuts against the end of the linear bearing, and the other end abuts against the first fixed unit.

[0010] Furthermore, the first fixing unit includes a fixing frame and a fixing plate, the fixing frame is fixedly connected to the buffer unit, the fixing plate is rotatably arranged in the fixing frame, and a groove for fixing the cleaning member is arranged on the fixing plate.

[0011] Furthermore, the fixing frame includes an upper plate, a lower plate and a side plate; the side plate is fixedly connected to the buffer unit; two arc grooves are respectively provided on the upper plate and the lower plate, and a threaded hole is provided at the center position of each arc groove; the fixing plate can rotate around the axis of the threaded hole.

[0012] Furthermore, a rectangular opening portion recessed inward from a side edge is provided on one side of the fixing sheet, a groove is provided between the opening portion and the other side edge, and the groove is parallel to the edge of the opening portion.

[0013] Furthermore, the second action unit includes a second driving element, a slider and a slide rail; the cleaning component fixed frame is provided with a supporting column and a supporting beam; the slide rail is fixedly arranged on the upper surface of the supporting beam, the slider is sleeved on the slide rail, and the second driving element is fixedly arranged on the slider.

[0014] Furthermore, the lower cleaning mechanism includes a mounting plate, a third action unit and a cleaning plate, the mounting plate is fixedly arranged on the cross bar, the third action unit is fixedly arranged on the mounting plate, and the cleaning plate is fixedly arranged on the output end of the third action unit.

[0015] Furthermore, the third action unit includes a third driving element, a rack, a gear, a rocker arm and a connecting rod; the third driving element is fixedly arranged on the mounting plate; the output end of the third driving element is fixedly connected to the rack; one end of the connecting rod is fixedly arranged on the mounting plate, and the other end is provided with the gear through a rotating shaft; the gear is meshed with the rack and the gear is fixedly connected to the rocker arm.

[0016] Furthermore, the longitudinal rods are provided in two numbers and are respectively connected to one end of the cross rod; the first driving element is fixedly connected to the middle part of the cross rod; and the lower cleaning mechanism and the side cleaning mechanism are both provided in two numbers.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] By synchronously driving the side cleaning mechanism and the lower cleaning mechanism arranged at the corners of the photovoltaic component frame to move back and forth through the first action unit in the cleaning component, the residual glue at the corners of the photovoltaic component frame can be automatically cleaned, saving labor and improving production efficiency.

[0019] Since two lower cleaning mechanisms and two side cleaning mechanisms are provided, the residual glue at the two corners of the photovoltaic module frame can be cleaned at the same time, further improving the efficiency.

[0020] Since the buffer unit is provided, the impact between the side cleaning mechanism and the photovoltaic component is reduced, thereby avoiding damage.

[0021] Since the fixing piece is rotatable, the angle of the cleaning piece can be adjusted automatically under the pressure of the photovoltaic module during cleaning to enhance the cleaning effect.

[0022] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0024] Figure 1 A three-dimensional perspective view of a specific embodiment of the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of a cleaning assembly in an embodiment;

[0026] Figure 3 A three-dimensional perspective view of a side cleaning mechanism of the cleaning mechanism applicable to the corner of a photovoltaic module of the utility model;

[0027] Figure 4 for Figure 3 An exploded schematic diagram of the side cleaning mechanism in FIG.

[0028] Figure 5 for Figure 3 A top view of the side cleaning mechanism in FIG.

[0029] Figure 6 for Figure 2 A partial enlarged view of the structure in the circle;

[0030] Figure 7 A three-dimensional perspective view of the lower cleaning mechanism of the cleaning mechanism applicable to the corner of a photovoltaic module of the utility model;

[0031] Figure 8 A three-dimensional perspective view of the lower cleaning mechanism of the cleaning mechanism for the corner of a photovoltaic module of the present invention from another direction;

[0032] Fig. 9 It is a three-dimensional perspective view of the mounting seat of the first action unit in the utility model.

[0033] Reference numerals:

[0034] 100-frame; 110-photovoltaic module placement table; 120-cleaning module fixing frame; 121-supporting column; 122-supporting beam; 123-slider; 124-slide rail;

[0035] 200-cleaning assembly; 210-side cleaning mechanism; 211-first fixing unit; 212-buffering unit; 213-second action unit; 214-fixing frame; 215-fixing plate; 2151-opening; 2152-groove; 216-fixing rod; 2161-linear bearing; 217-spring; 218-vertical plate; 219-second driving element; 220-lower cleaning mechanism; 221-mounting plate; 222-third action unit; 223-cleaning plate; 224-third driving element; 225-rack; 226-gear; 227-swing rod; 228-connecting rod; 230-first action unit; 231-first driving element; 232-driving connecting plate; 233-mounting seat;

[0036] 300-Photovoltaic panels. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0038] It should be noted that in all the drawings, hidden structures are represented by dotted lines.

[0039] Example 1

[0040] A specific embodiment of the cleaning mechanism of the utility model is suitable for the corner of a photovoltaic module, as shown in FIG. Figure 1 As shown, the cleaning device comprises a frame 100 and a cleaning assembly 200 .

[0041] The rack 100 includes a photovoltaic component placement platform 110 and a cleaning component fixing frame 120. The photovoltaic component placement platform 110 has four legs and two horizontal plates arranged on the top of the legs and fixed by the legs, and the photovoltaic component 300 is placed above the two horizontal plates, and the two ends of the photovoltaic component 300 extend a distance outside the two horizontal plates.

[0042] The cleaning component fixing frame 120 is a cubic frame structure, including 12 rods respectively located at the edges of the cube. The height of the upper frame of the cleaning component fixing frame 120 is higher than the photovoltaic component 300, and the lower frame is located below the two horizontal plates, and the upper surface of the lower frame is in contact with the bottom surface of the two horizontal plates and is fixedly set on the bottom surface of the two horizontal plates. Through such an arrangement, when the photovoltaic component 300 is placed on the photovoltaic component placement table 110, it is completely located within the cubic frame structure of the cleaning component fixing frame 120.

[0043] The cleaning assembly 200 is fixedly disposed on the cleaning assembly fixing frame 120 , and can reciprocate relative to the cleaning assembly fixing frame 120 to clean the corners of the photovoltaic assembly 300 .

[0044] See also Figure 2 The cleaning assembly 200 includes a side cleaning mechanism 210, a bottom cleaning mechanism 220 and a first action unit 230. The first action unit 230 can drive the side cleaning mechanism 210 and the bottom cleaning mechanism 220 to reciprocate relative to the photovoltaic assembly 300.

[0045] The first action unit 230 includes a first driving element 231 , which can be a cylinder, a hydraulic cylinder, or a linear driving unit such as an electric telescopic rod. The first driving element 231 is fixedly mounted on the cleaning component fixing frame 120 via a mounting seat 233 .

[0046] See also Fig. 9The mounting base 233 is an L-shaped plate, one end of which is provided with two mounting holes, and the other end of which is provided with two mounting lugs. Figure 2 The mounting seat 233 is arranged on the cleaning component fixing frame 120 through the two mounting holes, the first driving element 231 is fixedly arranged on the mounting seat 233 through two mounting lugs, and the output shaft of the first driving element 231 extends toward the inside of the cleaning component fixing frame 120.

[0047] See also Figure 2 The output shaft end of the first driving element 231 is fixedly connected to a driving connecting plate 232. The driving connecting plate 232 includes a crossbar and two longitudinal bars extending from both ends of the crossbar in the same direction, the two longitudinal bars are perpendicular to the crossbar, and the two longitudinal bars and the crossbar form a concave shape.

[0048] The output shaft end of the first driving element 231 is fixedly connected to the middle of the crossbar of the driving connecting plate 232, and can drive the driving connecting plate 232 to reciprocate as a whole.

[0049] See also Figure 2 , the side cleaning mechanism 210 and the lower cleaning mechanism 220 are both fixedly arranged on the driving connecting plate 232. Among them, the side cleaning mechanism 210 is arranged on the longitudinal rod of the driving connecting plate 232, and the lower cleaning mechanism 220 is arranged on the crossbar of the driving connecting plate 232. A long slot fixing hole is arranged on the longitudinal rod, and the side cleaning mechanism 210 is fixedly arranged on the longitudinal rod of the driving connecting plate 232 through the fixing element and the long slot fixing hole, so as to facilitate the adjustment of the front and rear positions of the side cleaning mechanism 210 fixed on the driving connecting plate 232, and facilitate the cleaning of the corresponding corner positions of photovoltaic modules of different lengths. After installation, the side cleaning mechanism 210 is fixed relative to the driving connecting plate 232. A long slot is arranged on the mounting plate 221 of the lower cleaning mechanism 220. Through the fixing element and the long slot, the lower cleaning mechanism 220 is fixedly arranged on the crossbar of the driving connecting plate 232, and the overall upper and lower heights of the lower cleaning mechanism 220 can be conveniently adjusted.

[0050] A preferred solution is that there are two side cleaning mechanisms 210 and two bottom cleaning mechanisms 220, which are symmetrically arranged on the driving connecting plate 232, so that the two corners of the photovoltaic module can be cleaned at the same time.

[0051] See also Figure 3-Figure 5 The side cleaning mechanism 210 includes a first fixing unit 211 , a buffer unit 212 and a second action unit 213 .

[0052] See also Figure 2 , Figure 3 as well as Figure 6 The second action unit 213 includes a second driving element 219 , a slider 123 and a slide rail 124 .

[0053] A support column 121 and a support beam 122 are provided near the corner of the cleaning component fixed frame 120. The support column 121 extends upward from the lower frame of the cleaning component fixed frame 120. The support beam 122 extends from the side of the cleaning component fixed frame 120 toward the support column 121 in a horizontal plane and is connected to the support column 121 to support the side cleaning mechanism 210. The slide rail 124 is fixedly arranged on the upper surface of the support beam 122, and the slider 123 is sleeved on the slide rail 124 and can slide back and forth along the slide rail 124. The second driving element 219 is fixedly arranged on the slider 123.

[0054] The second driving element 219 can be a cylinder, a hydraulic cylinder, or a linear driving unit such as an electric telescopic rod. Figure 2 as well as Figure 6 The second driving element 219 is fixedly connected to the longitudinal rod of the driving connecting plate 232 and can be driven by the first driving element 231 , so that the second driving element 219 slides back and forth along the slide rail 124 through the slider 123 .

[0055] See also Figure 3-Figure 5 , a buffer unit 212 is fixedly arranged at the output end of the second driving element 219. The buffer unit 212 includes an L-shaped vertical plate 218, a fixed rod 216, a linear bearing 2161 and a spring 217. One end of the vertical plate 218 extends horizontally and is fixedly arranged at the output end of the second driving element 219; the other end extends vertically, and a through hole is arranged on its plate surface, the bottom of the linear bearing 2161 is fixed to one side of the vertical plate 218, and the sleeve part of the linear bearing 2161 passes through the through hole. Threaded sections are arranged at both ends of the fixed rod 216, and the first end of the fixed rod 216 extends from the bottom of the linear bearing 2161 and cooperates with a limit nut (not shown in the figure). The threaded section at the second end of the fixed rod 216 is fixedly connected to the first fixed unit 211. A spring 217 is sleeved on the fixed rod 216, and one end of the spring 217 abuts against the sleeve part of the linear bearing 2161, and the other end abuts against the first fixed unit 211. When the first fixing unit 211 is subjected to pressure, the fixing rod 216 may move relative to the through hole of the vertical plate 218 toward the vertical plate 218 .

[0056] Furthermore, there are four groups of fixed rods 216, linear bearings 2161, and springs 217, which are evenly distributed in the vertical extension of the vertical plate 218. Specifically, four linear bearings 2161 are fixed in the vertical extension of the vertical plate 218; the four fixed rods 216 move forward and backward in the four linear bearings 2161 respectively, one end of the fixed rod 216 is threaded and fixed with a limit nut, and the other end is threaded and fixed to the fixing frame 214 of the first fixing unit 211. The spring 217 is sleeved on the fixed rod 216, and when the fixing frame 214 contacts the photovoltaic module and generates pressure, the fixed rod 216 is compressed back along the linear bearing 2161, and at the same time, the spring 217 is stressed to achieve buffering.

[0057] See also Figure 3-Figure 5 The first fixing unit 211 is used to clamp and fix the scouring pad, and includes a fixing frame 214 and a fixing plate 215. The fixing frame 214 includes an upper plate, a lower plate and a side plate, which together constitute a concave member. Four threaded holes are provided on the side plate for connecting and fixing with the threaded section of the second end of the fixing rod 216. There are two arc grooves on the upper plate and the lower plate respectively, and a threaded hole is provided at the center position of each arc groove. The arc groove and the threaded hole are both used for fixed connection with the fixing plate 215.

[0058] The fixing sheet 215 is a sheet-like element, which is a rectangular sheet as a whole, and a rectangular opening 2151 is provided on one side thereof, which is recessed inward from the side edge, and a groove 2152 is provided between the opening 2151 and the other side edge, and the groove 2152 is parallel to the edge of the opening 2151. After the scouring pad is wrapped around the fixing sheet 215, it passes through the groove and is fixed to the fixing sheet 215 by the pressing plate and screws.

[0059] The top edge and the bottom edge of the fixing plate 215 are each provided with two threaded holes, and the distance between the two threaded holes is equal to the radius of the arc groove on the fixing frame 214. When installing the fixing plate 215, the fixing plate 215 is vertically placed between the upper plate and the lower plate of the fixing frame 214, so that the opening 2151 faces the direction away from the side plate of the fixing frame 214, and the threaded holes are respectively aligned with the arc groove or the threaded holes at the center of the arc groove, and then screws or bolts are inserted downward or upward from the threaded holes or the arc groove into the threaded holes at the top edge or bottom edge of the fixing plate 215 and tightened. In this way, the fixing plate 215 can rotate around the axis of the threaded hole at the center of the arc groove.

[0060] Two horizontally extending threaded holes are provided on the fixing plate 215. The scouring pad is wrapped around the surface of the fixing plate 215, and the excess part passes through the long groove of the fixing plate 215. The end overlaps with the starting end and is directly fixed to the two threaded holes on the fixing plate 215 by the pressing plate and screws.

[0061] When working, the output end of the second driving element 219 extends outward, driving the first fixing unit 211 to approach the photovoltaic module, and finally abuts against the side of the frame of the photovoltaic module. The first driving element 231 drives the side cleaning mechanism 210 to move back and forth relative to the photovoltaic module, and the scouring pad cleans the side of the frame.

[0062] Figure 7-Figure 8 The utility model shows a lower cleaning mechanism 220 suitable for cleaning the corner of a photovoltaic module, comprising a mounting plate 221, a third action unit 222 and a cleaning plate 223. The mounting plate 221 is an L-shaped plate, the first end of which extends in the vertical direction, and is provided with two parallel long grooves extending in the vertical direction, and is fixed to the crossbar of the driving connecting plate 232 by a connecting device such as bolts, see Figure 2 By such arrangement, the overall vertical height of the lower cleaning mechanism 220 can be conveniently adjusted.

[0063] See also Figure 7 , Figure 8 The second end of the mounting plate 221 extends in the horizontal direction and is connected to the bottom of the first end. A third action unit 222 is arranged on the upper surface of the second end of the mounting plate 221 .

[0064] The third action unit 222 includes a third driving element 224, a rack 225, a gear 226, a swing rod 227 and a connecting rod 228. The third driving element 224 can be a cylinder, a hydraulic cylinder, or a linear driving unit such as an electric telescopic rod, which is fixedly arranged on the upper surface of the second end of the mounting plate 221. The output end of the third driving element 224 is fixedly connected to the rack 225, and can drive the rack 225 to move back and forth. One end of the connecting rod 228 is fixedly arranged on the mounting plate 221, and a gear 226 is arranged on the other end through a rotating shaft, and the gear 226 can rotate around the rotating shaft relative to the connecting rod 228. The gear 226 is meshed with the rack 225 and can be driven to rotate by the rack 226. The gear 226 is fixedly connected to the swing rod 227, so that the swing rod 227 can be driven to swing.

[0065] The cleaning plate 223 is fixedly arranged on the side of the free end of the swing rod 227, and its end protrudes a distance from the end of the swing rod 227. The cleaning plate 223 is preferably a silicone plate. When the swing rod 227 swings, the cleaning plate 223 scrapes the bottom surface of the photovoltaic module to complete the cleaning work.

[0066] Furthermore, in order to clean the four corners of the photovoltaic assembly at the same time to improve efficiency, the cleaning mechanism may include two cleaning assemblies 200 , which are arranged on both sides of the cleaning assembly fixing frame 120 in a mirror-symmetrical manner.

[0067] When a cleaning mechanism for the corner of a photovoltaic module is used to clean the photovoltaic module, the working process is as follows: when the photovoltaic module flows into place, it is in a state where the back side faces upward, and a universal fixing device or a limiting device can be used to limit and fix it, such as a fixed clamp or a limiting pin, to prevent it from moving during the cleaning process. Then, the first driving element 231 extends and the second driving element 219 extends, so that the side cleaning mechanism 210 abuts against the side of the frame of the photovoltaic module, and at the same time, the third driving element 224 reciprocates, so that the lower cleaning mechanism 220 cleans the lower surface of the corner of the photovoltaic module frame. After the cleaning is completed, the first driving element 231 retracts, the side cleaning mechanism 210 performs side cleaning, and the photovoltaic module flows out.

[0068] The utility model is a cleaning mechanism suitable for the corners of photovoltaic modules, which can automatically clean the residual glue at the corners of the frame, saving labor and improving production efficiency. At the same time, mechanical operation can avoid the risk of human injuries and bumps that may occur during manual operation, and the risk of human hand scratches caused by the sharp corners of the frame.

[0069] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A cleaning mechanism suitable for the corners of photovoltaic modules, characterized in that: Includes rack and cleaning assembly; The rack includes a photovoltaic component placement platform and a cleaning component fixing frame fixedly arranged on the photovoltaic component placement platform; The cleaning component includes a first action unit, a side cleaning mechanism and a lower cleaning mechanism; the first action unit includes a mounting seat, a first driving element and a driving connecting plate, the mounting seat is fixedly arranged on the cleaning component fixing frame, the first driving element is fixedly arranged on the mounting seat, and the output end of the first driving element is fixedly connected to the driving connecting plate; the driving connecting plate includes a cross bar and a longitudinal bar connected to and perpendicular to the end of the cross bar, the lower cleaning mechanism is fixedly arranged on the cross bar, and the side cleaning mechanism is fixedly arranged on the longitudinal bar.

2. A cleaning mechanism for the corners of photovoltaic modules according to claim 1, characterized in that: The side cleaning mechanism includes: a second action unit, a buffer unit and a first fixed unit, the second action unit is fixedly arranged on the longitudinal rod, the output end of the second action unit is fixedly connected to one end of the buffer unit, the other end of the buffer unit is fixedly connected to the first fixed unit, and the first fixed unit is detachably provided with a cleaning piece.

3. A cleaning mechanism for the corners of photovoltaic modules according to claim 2, characterized in that: The buffer unit includes an L-shaped vertical plate, a fixed rod, a linear bearing and a spring; one end of the vertical plate extends horizontally and is fixedly arranged at the output end of the second action unit; the other end of the vertical plate extends vertically and is provided with a through hole, and the linear bearing is fixedly arranged in the through hole; the first end of the fixed rod passes through the linear bearing and the through hole, and the threaded section of the second end of the fixed rod is fixedly connected to the first fixed unit; the spring is sleeved on the fixed rod, one end of the spring abuts against the end of the linear bearing, and the other end abuts against the first fixed unit.

4. A cleaning mechanism for the corners of photovoltaic modules according to claim 2, characterized in that: The first fixing unit comprises a fixing frame and a fixing sheet, the fixing frame is fixedly connected to the buffer unit, the fixing sheet is rotatably arranged in the fixing frame, and a groove for fixing the cleaning member is arranged on the fixing sheet.

5. A cleaning mechanism for the corners of photovoltaic modules according to claim 4, characterized in that: The fixing frame includes an upper plate, a lower plate and a side plate; the side plate is fixedly connected to the buffer unit; two arc grooves are respectively provided on the upper plate and the lower plate, and a threaded hole is provided at the center position of each arc groove; the fixing plate can rotate around the axis of the threaded hole.

6. A cleaning mechanism for the corners of photovoltaic modules according to claim 5, characterized in that: A rectangular opening portion recessed inward from a side edge is provided on one side of the fixing sheet, a groove is provided between the opening portion and the other side edge, and the groove is parallel to the edge of the opening portion.

7. A cleaning mechanism for the corner of a photovoltaic module according to any one of claims 2 to 6, characterized in that: The second action unit includes a second driving element, a slider and a slide rail; the cleaning component fixed frame is provided with a supporting column and a supporting beam; the slide rail is fixedly arranged on the upper surface of the supporting beam, the slider is sleeved on the slide rail, and the second driving element is fixedly arranged on the slider.

8. A cleaning mechanism for photovoltaic module corners according to claim 1, characterized in that: The lower cleaning mechanism comprises a mounting plate, a third action unit and a cleaning plate, wherein the mounting plate is fixedly arranged on the cross bar, the third action unit is fixedly arranged on the mounting plate, and the cleaning plate is fixedly arranged on the output end of the third action unit.

9. A cleaning mechanism for the corners of photovoltaic modules according to claim 8, characterized in that: The third action unit includes a third driving element, a rack, a gear, a rocker arm and a connecting rod; the third driving element is fixedly arranged on the mounting plate; the output end of the third driving element is fixedly connected to the rack; one end of the connecting rod is fixedly arranged on the mounting plate, and the other end is provided with the gear through a rotating shaft; the gear is meshed with the rack and the gear is fixedly connected to the rocker arm.

10. A cleaning mechanism for the corners of photovoltaic modules according to claim 1, characterized in that: The longitudinal rods are provided in two numbers and are respectively connected to one end of the cross rod; the first driving element is fixedly connected to the middle part of the cross rod; the lower cleaning mechanism and the side cleaning mechanism are both provided in two numbers.

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