Compensation structure and coating equipment thereof

Abstract

The utility model belongs to the technical field of coating equipment, and particularly relates to a compensation structure and coating equipment thereof, comprising a cross beam, two ends of which are respectively connected with a first connecting structure and a second connecting structure; the first connecting structure is suitable for adjusting the horizontal angle of one side of the cross beam, and the second connecting structure is suitable for adjusting the horizontal angle of the other side of the cross beam and can adapt to the displacement of the cross beam; the first connecting structure and the second connecting structure are connected with the sliding end of the lifting assembly of the cross beam. By arranging a second connecting structure, the sliding end of the lifting assembly drives the second connecting structure to ascend and descend so as to drive the cross beam to ascend and descend; when the angle of the other end of the cross beam changes, the second connecting structure can be matched according to the change of the angle of the cross beam to prevent the cross beam from being damaged due to overlarge inclination angle; the displacement of the cross beam can be compensated through the second connecting structure, and the first connecting structure is matched with the second connecting structure, so that the cross beam can be in a horizontal state and can work stably.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating equipment, and in particular relates to a compensation structure and coating equipment thereof. Background Art

[0002] With the vigorous development of perovskite battery technology, the coating requirements for slit coaters are getting higher and higher, and gradually developing in the direction of high precision and cutting-edge; in related technologies, the crossbeam of the slit coater is driven by a dual-drive Z-axis, and the crossbeam and the dual-drive Z-axis are rigidly directly connected, which has high requirements for the synchronization of the Z-axis on both sides, and it is difficult to ensure the angle between the crossbeam and the horizontal. Once the crossbeam is installed, the angle between the crossbeam and the horizontal cannot be adjusted, which increases the stress of the middle crossbeam and affects the service life of the crossbeam;

[0003] Therefore, it is necessary to provide a compensation structure and coating equipment for solving the problem that the horizontal angle of the crossbeam of the slit coater cannot be adjusted. Utility Model Content

[0004] The utility model aims to provide a compensation structure and coating equipment thereof.

[0005] In order to solve the above technical problems, the utility model provides a compensation structure, including: a beam, whose two ends are respectively connected with a first connecting structure and a second connecting structure; the first connecting structure is suitable for adjusting the horizontal angle of one side of the beam, and the second connecting structure is suitable for adjusting the horizontal angle of the other side of the beam and can adapt to the displacement of the beam; wherein the first connecting structure and the second connecting structure are respectively connected to the sliding end of the lifting assembly of the beam.

[0006] Furthermore, the first connecting structure includes a fixed shaft and a pair of first bearings, and a first through hole is provided at one end of the crossbeam; the outer ring of the first bearing is clamped on the inner wall of the first through hole, and the fixed shaft passes through the first through hole and is fixed to the inner ring of the first bearing; wherein both ends of the fixed shaft are fixed to the sliding end of the lifting assembly.

[0007] Further, the first connection structure includes a first fastening assembly, and the first fastening assembly is suitable for limiting axial movement of the first bearing and the fixed shaft.

[0008] Further, the first fastening assembly includes a first outer sleeve, a first inner sleeve, a pair of first locking nuts, a pair of first spacers and a pair of first glands; the first outer sleeve is clamped on the inner wall of the first through hole, the first inner sleeve is sleeved on the fixed shaft, the two ends of the first outer sleeve respectively abut against the outer ring of the first bearing, and the two ends of the first inner sleeve respectively abut against the inner ring of the first bearing;

[0009] The first locking nut and the first spacer are mirror-imaged on the fixed shaft, and the two ends of the first spacer respectively abut against the inner ring of the first bearing and the first locking nut; the first pressure cover is respectively fixed at the mouth of the first through hole, and the first pressure cover is provided with a first clamping hole, and the outer wall of the first locking nut is clamped in the first clamping hole.

[0010] Furthermore, the second connecting structure includes an eccentric shaft, a pair of second bearings and a pair of third bearings; the middle part of the eccentric shaft is a large diameter end, and the two ends of the eccentric shaft are small diameter ends; the other end of the crossbeam is provided with a second through hole; the outer ring of the second bearing is clamped on the inner wall of the second through hole, and the large diameter end of the eccentric shaft passes through the second through hole and is fixed to the inner ring of the second bearing; the third bearings are respectively arranged in the sliding ends of the lifting assembly, wherein the small diameter end of the eccentric shaft is fixed to the inner ring of the second bearing.

[0011] Further, the second connection structure includes a second fastening assembly, and the second fastening assembly is suitable for limiting the axial movement of the eccentric shaft, the second bearing and the third bearing.

[0012] Further, the second fastening assembly includes a second outer sleeve, a second inner sleeve, a pair of second locking nuts, a pair of second spacers, a pair of third spacers, a pair of second pressure covers and a pair of bearing retaining rings; the second outer sleeve is clamped on the inner wall of the second through hole, the second inner sleeve is sleeved on the fixed shaft, the two ends of the second outer sleeve respectively abut the outer ring of the second bearing, and the two ends of the second inner sleeve respectively abut the inner ring of the second bearing; the second locking nut and the second spacer are mirror-imaged on the large diameter end of the eccentric shaft, and the two ends of the second spacer respectively abut the inner ring of the second bearing and the second locking nut; the second pressure covers are respectively fixed to the mouth of the second through hole, the second pressure covers are provided with second clamping holes, and the outer wall of the second locking nut is clamped in the second clamping hole; the bearing retaining ring and the third spacer are installed in the sliding end of the lifting assembly, and the inner ring of the third bearing is respectively abutted by the bearing retaining ring and the third spacer.

[0013] Furthermore, the sliding end of the lifting assembly is a pair of support seats and two pairs of connecting blocks, the support seats are provided with recesses, and the two ends of the beam are respectively inserted into the recesses; the bottom of the connecting block is provided with a semicircular groove that matches the top of the support seat, and after the connecting block is installed on the support seat, the semicircular groove forms a mounting through hole; the mounting through hole is used to fix the two ends of the fixed shaft and the third bearing, and the bearing retaining ring and the third spacer are respectively installed at the mouths at both ends of the mounting through hole.

[0014] Furthermore, the lifting assembly includes a sliding guide rail and a slider, the sliding guide rail is suitable for being installed on the inner wall of the vertical beam of the gantry, the slider is slidably set on the sliding guide rail, and the support seat is installed on the inner wall of the slider, wherein the slider is suitable for being connected to the output end of the lifting cylinder.

[0015] A coating device comprises any one of the compensation structures described above.

[0016] Beneficial effects of the utility model:

[0017] 1. By setting the first connecting structure, the sliding end of the lifting assembly drives the first connecting structure to rise and fall, thereby driving the beam to rise and fall; when the angle of one end of the beam changes, the first connecting structure can adapt according to the change in the angle of the beam. Compared with the original rigid direct connection between the beam and the sliding end of the lifting assembly, adaptive adjustment of the beam level is achieved to prevent the tilt angle from being too large, which increases the stress of the beam and causes damage or jamming of the beam.

[0018] 2. By setting up a second connecting structure, the sliding end of the lifting assembly drives the second connecting structure to rise and fall, thereby driving the beam to rise and fall; when the angle of the other end of the beam changes, the second connecting structure can adapt according to the change in the angle of the beam to prevent the beam from being stuck or damaged due to excessive inclination, thereby increasing the service life of the beam; the second connecting structure can compensate for the displacement of the beam, and the first connecting structure cooperates with the second connecting structure to enable the beam to be in a horizontal state, thereby ensuring that the beam can work stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the gantry and the crossbeam of the utility model from a front view perspective;

[0021] Figure 2 It is a schematic diagram of the cross-sectional view of the first connection structure and the second connection structure and the crossbeam of the utility model;

[0022] Figure 3 This is a schematic structural diagram of the first connection structure, the second connection structure and the crossbeam of the utility model from a first perspective;

[0023] Figure 4 It is a second perspective structural schematic diagram of the first connecting structure, the second connecting structure and the crossbeam of the utility model.

[0024] In the figure: 1, beam, 11, first through hole, 12, second through hole, 2, first connecting structure, 21, fixed shaft, 22, first bearing, 23, first fastening assembly, 231, first outer spacer, 232, first inner spacer, 233, first locking nut, 234, first spacer, 235, first gland, 2351, first clamping hole, 3, second connecting structure, 31, eccentric shaft, 32, second bearing, 33, third bearing, 34, second fastening assembly Component, 341, second outer spacer, 342, second inner spacer, 343, second locking nut, 344, second spacer, 345, third spacer, 346, second pressure cover, 3461, second clamping hole, 347, bearing retaining ring, 4, lifting component, 41, support seat, 411, recess, 42, connecting block, 43, mounting through hole, 44, sliding guide rail, 45, slider, 46, lifting cylinder, 5, gantry, 51, coating knife, 52, table. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In some embodiments, Figure 1-4As shown, the utility model provides a compensation structure, including: a beam 1, two ends of which are respectively connected with a first connection structure 2 and a second connection structure 3; the first connection structure 2 is suitable for adjusting the horizontal angle of one side of the beam 1, and the second connection structure 3 is suitable for adjusting the horizontal angle of the other side of the beam 1 and can adapt to the displacement of the beam 1; wherein, the first connection structure 2 and the second connection structure 3 are respectively connected to the sliding end of the lifting component 4 of the beam 1; by setting the first connection structure 2, the sliding end of the lifting component 4 drives the first connection structure 2 to rise and fall, thereby driving the beam 1 to rise and fall; when the angle of one end of the beam 1 changes, the first connection structure 2 can adapt according to the change of the angle of the beam 1, compared with the original beam 1 It is rigidly directly connected to the sliding end of the lifting component 4, which realizes adaptive adjustment of the horizontal level of the beam, prevents the tilt angle from being too large, which increases the stress of the beam 1 and causes damage or jamming of the beam 1, thereby improving the service life of the beam 1; by setting the second connecting structure 3, the sliding end of the lifting component 4 drives the second connecting structure 3 to rise and fall, thereby driving the beam 1 to rise and fall; when the angle of the other end of the beam 1 changes, the second connecting structure 3 can adapt according to the change in the angle of the beam 1, prevents the beam 1 from being jammed or damaged due to excessive tilt angle, thereby improving the service life of the beam 1; the displacement of the beam 1 can be compensated by the second connecting structure 3, and the first connecting structure 2 cooperates with the second connecting structure 3, so that the beam 1 can be in a horizontal state, ensuring that the beam 1 can work stably.

[0027] The first connecting structure 2 includes a fixed shaft 21 and a pair of first bearings 22, and a first through hole 11 is provided at one end of the beam 1; the outer ring of the first bearing 22 is clamped on the inner wall of the first through hole 11, and the fixed shaft 21 passes through the first through hole 11 and is fixed to the inner ring of the first bearing 22; wherein, both ends of the fixed shaft 21 are fixed to the sliding end of the lifting assembly 4; by providing the first bearing 22, the bearing is installed in the first through hole 11, and when there is a difference in the lifting distance between one end of the beam 1 and the other end of the beam 1, one end of the beam 1 can rotate around the fixed shaft 21 to compensate for the angular deviation of one end of the beam 1.

[0028] The first connecting structure 2 includes a first fastening component 23, which is suitable for limiting the axial movement of the first bearing 22 and the fixed shaft 21; by setting the first fastening component 23, the first fastening component 23 can axially fix the first bearing 22 and the fixed shaft 21 to avoid axial shaking of the first bearing 22 and the fixed shaft 21, so that the first bearing 22 and the fixed shaft 21 can work stably.

[0029] The first fastening assembly 23 includes a first outer sleeve 231, a first inner sleeve 232, a pair of first locking nuts 233, a pair of first spacers 234 and a pair of first pressure covers 235; the first outer sleeve 231 is clamped on the inner wall of the first through hole 11, the first inner sleeve 232 is sleeved on the fixed shaft 21, the two ends of the first outer sleeve 231 respectively abut against the outer ring of the first bearing 22, and the two ends of the first inner sleeve respectively abut against the inner ring of the first bearing 22; the first locking nut 233 and the first spacer 234 are mirror-imaged on the fixed shaft 21, and the two ends of the first spacer 234 respectively abut against the inner ring of the first bearing 22 and the first locking nut 233; the first pressure covers 235 are respectively fixed to the mouth of the first through hole 11, and the first pressure covers A first clamping hole 2351 is provided on 235, and the outer wall of the first locking nut 233 is clamped in the first clamping hole 2351; when installing the fixed shaft 21 and the first bearing 22, the first locking nuts 233 at both ends are screwed to squeeze the first spacer 234, and the first spacer presses against the outer side of the inner ring of the first bearing 22, and the two ends of the first outer spacer 231 respectively press against the outer ring of the first bearing 22, and the two ends of the first inner spacer respectively press against the inner ring of the first bearing 22, and the relative axial positions of the two bearings are fixed; the first pressure cover 235 is installed at the mouth of the first through hole 11 of the beam 1, and the first pressure cover 235 can stably support the first locking nut 233, and the inner side of the first pressure cover 235 fits the outer side of the outer ring of the first bearing 22, so as to further limit the first bearing 22.

[0030] The second connecting structure 3 includes an eccentric shaft 31, a pair of second bearings 32 and a pair of third bearings 33; the middle part of the eccentric shaft 31 is a large diameter end, and the two ends of the eccentric shaft 31 are small diameter ends; the other end of the crossbeam 1 is provided with a second through hole 12; the outer ring of the second bearing 32 is clamped on the inner wall of the second through hole 12, and the large diameter end of the eccentric shaft 31 passes through the second through hole 12 and is fixed to the inner ring of the second bearing 32; the third bearings 33 are respectively arranged in the sliding ends of the lifting components 4, wherein the small diameter end of the eccentric shaft 31 is fixed to the inner ring of the second bearing 32; by setting the eccentric shaft 31, the large diameter end of the eccentric shaft 31 is installed in the second through hole In the hole 12, the small diameter end of the eccentric shaft 31 is installed in the sliding end of the lifting assembly 4; when the lifting distances at the two ends of the beam 1 are different, causing the end of the beam 1 to tilt, the end of the beam 1 can preferentially rotate with the large diameter end of the eccentric shaft 31 as the center to compensate for the angular deviation of one end of the beam 1; when the offset at both ends of the beam 1 is too large, the small diameter end of the eccentric shaft 31 rotates in the sliding end of the lifting assembly 4, and through the deviation of the diameters of the small diameter end and the large diameter end, a certain margin can be left for the horizontal displacement of the beam 1, ensuring that the beam 1 can adapt to the displacement deviation of the sliding ends on both sides of the lifting assembly 4 connected to the beam 1, so that the beam 1 can always be in a horizontal state, ensuring the stability of the beam 1.

[0031] The second connecting structure 3 includes a second fastening component 34, which is suitable for limiting the axial movement of the eccentric shaft 31, the second bearing 32 and the third bearing 33; by setting the second fastening component 34, the second fastening component 34 can axially fix the second bearing 32 and the eccentric shaft 31 to avoid axial shaking of the second bearing 32 and the eccentric shaft 31, so that the second bearing 32 and the eccentric shaft 31 can work stably.

[0032] The second fastening assembly 34 includes a second outer sleeve 341, a second inner sleeve 342, a pair of second locking nuts 343, a pair of second spacers 344, a pair of third spacers 345, a pair of second glands 346 and a pair of bearing retaining rings 347; the second outer sleeve 341 is clamped on the inner wall of the second through hole 12, the second inner sleeve 342 is sleeved on the fixed shaft 21, the two ends of the second outer sleeve 341 respectively abut against the outer ring of the second bearing 32, and the two ends of the second inner sleeve respectively abut against the second shaft The inner ring of the second bearing 32; the second locking nut 343 and the second spacer 344 are mirror-imaged on the large diameter end of the eccentric shaft 31, and the two ends of the second spacer 344 respectively abut the inner ring of the second bearing 32 and the second locking nut 343; the second pressure cover 346 is respectively fixed to the mouth of the second through hole 12, and the second pressure cover 346 is provided with a second clamping hole 3461, and the outer wall of the second locking nut 343 is clamped in the second clamping hole 3461; the bearing retaining ring 347 and the The third spacer 345 is installed in the sliding end of the lifting assembly 4, and the inner ring of the third bearing 33 is respectively supported by the bearing retaining ring 347 and the third spacer 345; when installing the eccentric shaft 31, the second bearing 32 and the third bearing 33, the second locking nuts 343 at both ends are screwed to squeeze the second spacer 344, and the second spacer 344 is supported on the outer side of the inner ring of the second bearing 32, and the two ends of the second outer spacer sleeve 341 are respectively supported on the outer ring of the second bearing 32, and the two ends of the second inner spacer sleeve The two ends respectively abut against the inner ring of the second bearing 32, and the relative axial positions of the two second bearings 32 are fixed; the second pressure cover 346 is installed at the mouth of the second through hole 12 of the beam 1, and the second pressure cover 346 can stably support the second locking nut 343, and the inner side of the second pressure cover 346 fits against the outer side of the outer ring of the first bearing 22 to further limit the second bearing 32; by screwing the third locking nut, the two ends of the inner ring of the third bearing 33 can be abutted by the bearing retaining ring 347 and the third spacer 345 to prevent the third bearing 33 from axial shaking.

[0033] The sliding end of the lifting assembly 4 is a pair of support seats 41 and two pairs of connecting blocks 42. The support seat 41 is provided with a recess 411, and the two ends of the crossbeam 1 are respectively inserted into the recess 411; the bottom of the connecting block 42 is provided with a semicircular groove adapted to the top of the support seat 41. After the connecting block 42 is installed on the support seat 41, the semicircular groove forms a mounting through hole 43; the mounting through hole 43 is used to fix the two ends of the fixed shaft 21 and the third bearing 33, and the bearing retaining ring 347 and the third spacer ring 345 are respectively installed at the mouths of the two ends of the mounting through hole 43; when installing the fixed shaft 21, the two ends of the fixed shaft 21 are respectively supported by the semicircular grooves on the top of the support seat 41, and the connecting block 42 is connected to the support seat 41 by bolts, so that the two ends of the fixed shaft 21 are installed in the mounting through hole 43; similarly, the third bearing 33 is installed in the mounting through hole 43 to stably support the small diameter end of the eccentric shaft 31.

[0034] The lifting assembly 4 includes a sliding rail 44 and a slider 45, wherein the sliding rail 44 is suitable for being mounted on the inner wall of the vertical beam of the gantry 5, the slider 45 is slidably arranged on the sliding rail 44, and the support seat 41 is mounted on the inner wall of the slider 45, wherein the slider 45 is suitable for being connected to the output end of the lifting cylinder 46; the slider 45 is driven to slide by the lifting cylinder 46, thereby driving the support seat 41 to slide smoothly;

[0035] In some other embodiments, a coating device includes any of the compensation structures described above; when slit coating is performed on a perovskite solar cell substrate, the cell substrate is placed on a table 52, and a coating knife 51 is installed at the lower part of the beam 1. The lifting cylinder 46 drives the beam 1 to rise and fall, and drives the coating knife 51 to rise and fall, and adjusts to a suitable distance to coat the cell substrate; when there is a height deviation at both ends of the beam 1, the angle and offset at both ends of the beam 1 are automatically adjusted by the first connecting structure 2 and the second connecting structure 3, so that the beam 1 can work stably, thereby improving the working efficiency and service life of the beam 1.

[0036] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A compensation structure, characterized in that: include: A crossbeam (1), two ends of which are respectively connected to a first connection structure (2) and a second connection structure (3); The first connection structure (2) is suitable for adjusting the horizontal angle of one side of the crossbeam (1), and the second connection structure (3) is suitable for adjusting the horizontal angle of the other side of the crossbeam (1) and can adapt to the displacement of the crossbeam (1); wherein: The first connection structure (2) and the second connection structure (3) are respectively connected to the sliding ends of the lifting assembly (4) of the crossbeam (1).

2. A compensation structure as claimed in claim 1, characterized in that: The first connection structure (2) comprises a fixed shaft (21) and a pair of first bearings (22); one end of the crossbeam (1) is provided with a first through hole (11); the outer ring of the first bearing (22) is clamped on the inner wall of the first through hole (11); the fixed shaft (21) passes through the first through hole (11) and is fixed to the inner ring of the first bearing (22); wherein: Both ends of the fixed shaft (21) are fixed to the sliding end of the lifting assembly (4).

3. A compensation structure as claimed in claim 2, characterized in that: The first connection structure (2) comprises a first fastening component (23), wherein the first fastening component (23) is suitable for limiting the axial movement of the first bearing (22) and the fixed shaft (21).

4. A compensation structure as claimed in claim 3, characterized in that: The first fastening assembly (23) comprises a first outer spacer (231), a first inner spacer (232), a pair of first locking nuts (233), a pair of first spacers (234) and a pair of first glands (235); The first outer spacer (231) is clamped on the inner wall of the first through hole (11), the first inner spacer (232) is sleeved on the fixed shaft (21), the two ends of the first outer spacer (231) respectively abut against the outer ring of the first bearing (22), and the two ends of the first inner spacer respectively abut against the inner ring of the first bearing (22); The first locking nut (233) and the first spacer (234) are arranged in a mirror-image manner on the fixed shaft (21), and two ends of the first spacer (234) respectively abut against the inner ring of the first bearing (22) and the first locking nut (233); The first pressure covers (235) are respectively fixed to the mouths of the first through holes (11); a first clamping hole (2351) is provided on the first pressure covers (235); and the outer wall of the first locking nut (233) is clamped in the first clamping hole (2351).

5. A compensation structure as claimed in claim 2, characterized in that: The second connection structure (3) comprises an eccentric shaft (31), a pair of second bearings (32) and a pair of third bearings (33); the middle part of the eccentric shaft (31) is a large diameter end, and the two ends of the eccentric shaft (31) are small diameter ends; the other end of the crossbeam (1) is provided with a second through hole (12); the outer ring of the second bearing (32) is clamped on the inner wall of the second through hole (12), and the large diameter end of the eccentric shaft (31) passes through the second through hole (12) and is fixed to the inner ring of the second bearing (32); the third bearings (33) are respectively arranged in the sliding ends of the lifting components (4), wherein: The small diameter end of the eccentric shaft (31) is fixed to the inner ring of the second bearing (32).

6. A compensation structure as claimed in claim 5, characterized in that: The second connection structure (3) comprises a second fastening assembly (34), wherein the second fastening assembly (34) is suitable for limiting the axial movement of the eccentric shaft (31), the second bearing (32) and the third bearing (33).

7. A compensation structure as claimed in claim 6, characterized in that: The second fastening assembly (34) comprises a second outer spacer (341), a second inner spacer (342), a pair of second locking nuts (343), a pair of second spacers (344), a pair of third spacers (345), a pair of second glands (346) and a pair of bearing retaining rings (347); The second outer spacer (341) is clamped on the inner wall of the second through hole (12), the second inner spacer (342) is sleeved on the fixed shaft (21), the two ends of the second outer spacer (341) respectively abut against the outer ring of the second bearing (32), and the two ends of the second inner spacer respectively abut against the inner ring of the second bearing (32); The second locking nut (343) and the second spacer (344) are mirror-imaged on the large-diameter end of the eccentric shaft (31), and the two ends of the second spacer (344) respectively abut against the inner ring of the second bearing (32) and the second locking nut (343); The second glands (346) are respectively fixed to the mouths of the second through holes (12); a second clamping hole (3461) is provided on the second gland (346); and the outer wall of the second locking nut (343) is clamped in the second clamping hole (3461); The bearing retaining ring (347) and the third spacer ring (345) are installed in the sliding end of the lifting assembly (4), and the inner ring of the third bearing (33) is respectively supported by the bearing retaining ring (347) and the third spacer ring (345).

8. A compensation structure as claimed in claim 7, characterized in that: The sliding end of the lifting assembly (4) is a pair of support seats (41) and two pairs of connection blocks (42); the support seats (41) are provided with recesses (411), and the two ends of the crossbeam (1) are respectively inserted into the recesses (411); The bottom of the connecting block (42) is provided with a semicircular groove adapted to the top of the supporting seat (41); after the connecting block (42) is installed on the supporting seat (41), the semicircular groove forms a mounting through hole (43); the mounting through hole (43) is used to fix the two ends of the fixed shaft (21) and the third bearing (33); the bearing retaining ring (347) and the third spacer ring (345) are respectively installed at the mouths of the two ends of the mounting through hole (43).

9. A compensation structure as claimed in claim 8, characterized in that: The lifting assembly (4) comprises a sliding guide rail (44) and a sliding block (45), wherein the sliding guide rail (44) is suitable for being mounted on the inner wall of a vertical beam of a gantry (5), the sliding block (45) is slidably arranged on the sliding guide rail (44), and the supporting seat (41) is mounted on the inner wall of the sliding block (45), wherein The slider (45) is suitable for being connected to the output end of the lifting cylinder (46).

10. A coating device, characterized in that: The invention comprises the compensation structure as described in any one of claims 1 to 9.

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