Lifting device and coating apparatus

Abstract

The application discloses a lifting device and a coating equipment, and relates to the technical field of coating. The lifting device comprises mounting seats, a cross beam, lifting mechanisms and an adjusting mechanism. The two mounting seats are arranged at intervals along a first direction and are respectively used for connecting air floating plates of the coating equipment. The cross beam is arranged between the two mounting seats and is used for mounting a coating assembly. The two lifting mechanisms are connected with the two mounting seats in one-to-one correspondence, and the two lifting mechanisms are respectively connected with two ends of the cross beam. Each lifting mechanism comprises a first lifting assembly and at least two guide assemblies connected with the first lifting assembly. The at least two guide assemblies are arranged at intervals along a second direction. The guide assemblies are movably connected with the mounting seats along a third direction. The first lifting assembly is used for driving the at least two guide assemblies and the cross beam to move along the third direction. The third direction is a vertical direction. The adjusting mechanism comprises an adjusting beam and an adjusting piece. The adjusting beam is adjustably connected with the mounting seat through the adjusting piece. The adjusting piece is used for applying a tension force or a pushing force along the first direction to the mounting seat.

Description

Technical Field

[0001] This application relates to the field of coating technology, and more particularly to a lifting device and coating equipment. Background Technology

[0002] Air flotation coating equipment forms a thin air cushion by blowing high-pressure gas to the bottom of the equipment, allowing the carrier or worktable to slide in a state of almost no friction. The non-contact movement method improves the stability of the movement and ensures that there is no contact friction resistance in the overall motion mechanism during coating, achieving the high-precision motion requirements to ensure coating quality.

[0003] In related technologies, the lifting device of air flotation coating equipment usually includes two spaced-apart lifting components. The two lifting components drive the coating assembly to move up and down to adjust the gap between the coating head and the workpiece to be coated. The structure of the lifting components makes it difficult to ensure the verticality of the lifting components. The center of gravity of the lifting components is offset relative to the center of the air flotation plate, which affects the lifting of the coating assembly and causes the air flotation plate to tilt and jam, thus affecting the reliable operation of the coating equipment. Summary of the Invention

[0004] This application provides a lifting device and a coating equipment to solve the problem that the verticality of the lifting mechanism of the coating equipment is difficult to guarantee, which leads to the tilting and jamming of the air flotation plate.

[0005] In a first aspect, this application provides a lifting device for connecting to a moving device of a coating equipment. The lifting device includes: a mounting base, two mounting bases spaced apart along a first direction and respectively used to connect the air flotation plate of the moving device; a crossbeam disposed between the two mounting bases and used to mount a coating assembly; lifting mechanisms, two lifting mechanisms correspondingly connected to the two mounting bases, and the two lifting mechanisms respectively connected to both ends of the crossbeam; each lifting mechanism includes a first lifting component and at least two guide components connected to the first lifting component, the at least two guide components of each lifting mechanism being spaced apart along a second direction, the guide components being movably connected to the mounting base along a third direction, the first lifting component being used to drive the at least two guide components and the crossbeam to move along the third direction; wherein the first direction, the second direction, and the third direction are mutually perpendicular, and the third direction is a vertical direction; and an adjustment mechanism including an adjustment beam and an adjustment member, the adjustment beam being adjustablely connected to the mounting base through the adjustment member, the adjustment member being used to apply a tension force or a pushing force along the first direction to the mounting base.

[0006] In one implementation, the first lifting assembly includes a first driving member, a lead screw connected to the first driving member, and a nut screwed to the lead screw. The nut is used to connect to the guide assembly. The at least two guide assemblies of each lifting mechanism are connected to the crossbeam through at least one connecting seat. The first driving member is used to drive the lead screw to rotate relative to the nut so as to drive the at least two guide assemblies and the at least one connecting seat to move along the third direction.

[0007] In one implementation, the mounting base includes a top plate, a bottom plate, and two first side plates. The two ends of the first side plates are connected to the top plate and the bottom plate, respectively. The two first side plates are spaced apart along a second direction. Each first side plate is provided with a slide rail, the extension direction of which is parallel to the third direction. The guide assembly includes a connecting shaft and a slider. One end of the connecting shaft is connected to the nut, and the other end of the connecting shaft is slidably connected to the slide rail via the slider. The connecting base is movably connected to the connecting shaft.

[0008] In one implementation, the connecting seat includes two first connecting portions and a second connecting portion connected to the two first connecting portions. The two first connecting portions are spaced apart along the second direction. The two first connecting portions are connected one-to-one with the connecting shafts of the two guide components. The second connecting portion is used to connect with the crossbeam.

[0009] In one implementation, the first connecting part is movably connected to the connecting shaft via a self-aligning assembly. The self-aligning assembly includes a rolling bearing and an eccentric sleeve. The rolling bearing is sleeved on the connecting shaft, and the eccentric sleeve is sleeved on the rolling bearing. The eccentric sleeve is movably embedded in the first connecting part.

[0010] In one implementation, the mounting base includes a second side plate, which is disposed on one side of the mounting base facing the crossbeam along the first direction. The second side plate is connected to the two first side plates, the top plate, and the bottom plate. The second side plate has an opening for the crossbeam to pass through.

[0011] In one implementation, the lifting mechanism further includes a second lifting component, which is connected to the crossbeam via a connecting block. The connecting block is located on the side of the connecting seat away from the bottom of the mounting seat along the third direction. The second lifting component is used to move synchronously with the first lifting component to drive the crossbeam to move along the third direction.

[0012] In one implementation, the lifting mechanism includes at least two second lifting components, which are spaced apart along the second direction, and the first lifting component is located between the at least two second lifting components.

[0013] In one implementation, the second lifting assembly includes a second driving member and a telescopic rod that is throttle-connected to the second driving member. The telescopic rod is used to connect to the connecting block, and the second driving member is used to drive the telescopic rod to move along the third direction.

[0014] In one implementation, a mounting plate is fixedly connected to one end of the adjusting beam near the mounting base. The adjusting member includes a tensioning member and a pushing member. The tensioning member is adjustablely disposed on the mounting plate, and one end of the tensioning member is adjustablely connected to the mounting base. The tensioning member is used to apply a tensioning force to the mounting base toward the center plane of the two lifting mechanisms. The pushing member is adjustablely disposed on the mounting plate, and one end of the pushing member abuts against the mounting base. The pushing member is used to apply a pushing force to the mounting base away from the center plane of the two lifting mechanisms.

[0015] In one implementation, at least two of the tensioning members are located on opposite sides of the pushing member, or at least two of the pushing members are located on opposite sides of the tensioning member.

[0016] In one implementation, the adjusting beam has a first connecting plate on the side facing the mounting base, and the first connecting plate is located on the side of the mounting plate facing the mounting base. The first connecting plate has a first connecting hole. The mounting base has a second connecting plate, and the second connecting plate is located on the side of the mounting plate facing the mounting base. The second connecting plate has a second connecting hole. Fasteners pass through the first connecting hole and the second connecting hole to fix the adjusting beam to the mounting base.

[0017] Secondly, this application provides a coating device, including a base, a moving device, a coating assembly, and a lifting device. The base includes a base platform and a guide rail and an adsorption platform disposed on the base platform. The moving device is disposed on the guide rail and includes an air flotation structure. Two air flotation units of the air flotation structure are spaced apart along a first direction, and the two air flotation units move along a second direction. The lifting device is connected to the two air flotation units one-to-one via two mounting seats. The lifting device includes two lifting mechanisms and a crossbeam connected to the two lifting mechanisms. The two lifting mechanisms are used to drive the crossbeam to move along a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular. The coating assembly is mounted on the crossbeam and includes a coating head and a liquid supply module. The liquid supply module is used to supply coating liquid to the coating head, and the coating head is used to coat the workpiece with the coating liquid.

[0018] The lifting device and coating equipment provided in this application apply a tensioning or pushing force along a first direction to the mounting base through the adjusting component of the adjusting mechanism to ensure the perpendicularity of the mounting base and the lifting mechanism. After the mounting base is adjusted to the correct position, the adjusting beam connects to the mounting base to ensure the stability of the perpendicularity of the two lifting mechanisms. The cross structure formed by the first lifting component and at least two guide components of the lifting mechanism ensures that the center of gravity of the lifting mechanism is aligned with the center of the air flotation plate, avoiding tilting or jamming of the air flotation plate, ensuring the stability of the air flotation gap between the air flotation plate and the guide rail, and thus ensuring coating quality. In addition, it is beneficial to the smoothness and stability of the beam lifting. Coating equipment with the above-mentioned lifting device can improve the coating quality and coating efficiency of the coating equipment. The first lifting component and the second lifting component share the load of the beam, which is beneficial to the smoothness of the beam lifting. The self-aligning component includes a rolling bearing sleeved on the connecting shaft and an eccentric sleeve sleeved on the rolling bearing. The rotation of the outer ring of the rolling bearing and the eccentric sleeve adjusts the slight imbalance during the lifting process, ensuring the perpendicularity of the lead screw, and the adjustment method is flexible. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the coating equipment provided in the embodiments of this application; Figure 2 This is a schematic diagram of the lifting device provided in the embodiments of this application; Figure 3 This is one of the structural schematic diagrams of the lifting mechanism and mounting base provided in the embodiments of this application; Figure 4 This is a second schematic diagram of the lifting mechanism and mounting base provided in the embodiments of this application; Figure 5 This is one of the partial schematic diagrams of the lifting device provided in the embodiments of this application; Figure 6 This is an internal schematic diagram of the mounting base and lifting mechanism provided in the embodiments of this application; Figure 7 This is a partial sectional view of the mounting base and lifting mechanism provided in the embodiments of this application; Figure 8 This is a second partial schematic diagram of the lifting device provided in the embodiments of this application.

[0020] Key reference numerals: 1-Lifting device; 11-Mounting base; 111-Base plate; 112-Top plate; 113-First side plate; 114-Second side plate; 1141-Opening; 115-Third side plate; 116-Second connecting plate; 117-Slide rail; 12-Lifting mechanism; 121-First lifting assembly; 1211-First driving component; 1212-Screw rod; 1213-Nut; 122-Guide assembly; 1221-Connecting shaft; 1222-Connecting plate body; 1223-Slider; 123-Connecting base; 1231-First connecting part; 12311-First hole; 12312-Second hole; 1232-Second connecting part ; 124-Self-aligning assembly; 1241-Rolling bearing; 1242-Eccentric sleeve; 1243-Limiting plate; 125-Second lifting assembly; 1251-Telescopic rod; 126-Connecting block; 1261-Third connecting part; 1262-Fourth connecting part; 13-Crossbeam; 14-Adjusting mechanism; 141-Adjusting beam; 142-Adjusting component; 1421-Tightening component; 1422-Pushing component; 143-Mounting plate; 144-First connecting plate; 1441-First connecting hole; 2-Coating assembly; 21-Coating head; 3-Moving device; 31-Air flotation plate; 4-Base; 41-Base platform; 42-Guide rail; 43-Adsorption platform. Detailed Implementation

[0021] The embodiments of this application are described below with reference to the accompanying drawings.

[0022] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0023] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should be understood that the terms "first," "second," etc., used in this application are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0025] In the description of this application, the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Coating equipment includes air-float coating equipment. Air-float coating equipment uses high-pressure gas blown to the bottom of the equipment to form a thin air cushion, allowing the carrier or worktable to slide with almost no friction. This non-contact movement greatly improves the smoothness of the movement. Air-float coating equipment typically includes a moving device, a lifting device, and a coating assembly. The moving device includes an air-float plate movably connected to a guide rail. The lifting device is fixed to the air-float plate, and the coating assembly is mounted on the crossbeam of the lifting device. The air-float plate moves in the front-back direction, driving the lifting device and coating assembly in the same direction. The lifting device drives the coating assembly vertically. The coating operation is completed through the reciprocating motion of the air-float plate in the front-back direction and the lifting motion of the lifting device in the vertical direction. In related technologies, the lifting device of coating equipment usually includes two spaced-apart lifting mechanisms. These two lifting mechanisms drive the coating assembly in vertical movement. However, in these technologies, it is difficult to ensure the verticality of the two lifting mechanisms. When the lifting mechanisms tilt, the air-float plate may tilt or jam, affecting its movement and the coating operation.

[0028] Figure 1 This is a schematic diagram of the coating equipment provided in the embodiments of this application. Figure 2 This is a schematic diagram of the lifting device provided in the embodiments of this application. Figure 1 and Figure 2 In the diagram, the X direction is the first direction, the Y direction is the second direction, and the Z direction is the third direction.

[0029] Combination Figure 1 and Figure 2This application provides a lifting device 1, which is used on a coating equipment. By reasonably designing the structure of the lifting mechanism 12 and by the auxiliary cooperation of the adjusting mechanism 14, the verticality of the lifting device 1 is ensured, the problem of tilting or jamming of the air flotation plate 31 is avoided, and the reliable operation of the air flotation plate 31 is guaranteed.

[0030] The lifting device 1 provided in this embodiment is used to connect with the moving device 3 of the coating equipment. The lifting device 1 includes a mounting base 11, a crossbeam 13, a lifting mechanism 12, and an adjusting mechanism 14. Two mounting bases 11 are spaced apart along a first direction and are respectively used to connect the air flotation plate 31 of the moving device 3. The crossbeam 13 is located between the two mounting bases 11 and is used to install the coating assembly 2. Two lifting mechanisms 12 are connected to the two mounting bases 11 one-to-one and are respectively connected to both ends of the crossbeam 13. Each lifting mechanism 12 includes a first lifting component 121 and at least two guide components 122 connected to the first lifting component 121. The at least two guide components 122 of each lifting mechanism 12 are spaced apart along a second direction. The guide components 122 are movably connected to the mounting base 11 along a third direction. The first lifting component 121 is used to drive the at least two guide components 122 and the crossbeam 13 to move along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other, and the third direction is a vertical direction. The adjustment mechanism 14 includes an adjustment beam 141 and an adjustment member 142. The adjustment beam 141 is adjustablely connected to the mounting base 11 via the adjustment member 142. The adjustment member 142 is used to apply a tension force or a pushing force to the mounting base 11 in a first direction.

[0031] like Figure 1 As shown, the moving device 3 of the coating equipment includes air flotation plates 31, with two air flotation plates 31 spaced apart and movably mounted on two guide rails 42. It is understood that there is a suitable air flotation gap between the air flotation plates 31 and the guide rails 42. The two mounting seats 11 of the lifting device 1 are connected one-to-one with the two air flotation plates 31 of the moving device 3. The two mounting seats 11 are spaced apart along a first direction, and the distance between the two mounting seats 11 is set according to actual needs, such as the length of the workpiece to be coated. The air flotation plates 31 are used to move along a second direction, the first direction being consistent with the left-right direction of the coating equipment, and the second direction being consistent with the front-back direction of the coating equipment.

[0032] Figure 3 This is one of the structural schematic diagrams of the lifting mechanism and mounting base provided in the embodiments of this application. Figure 4 This is the second structural schematic diagram of the lifting mechanism and mounting base provided in the embodiments of this application. Figure 5 This is one of the partial schematic diagrams of the lifting device provided in the embodiments of this application. Figure 6 This is an internal schematic diagram of the mounting base and lifting mechanism provided in the embodiments of this application. Figure 5 The center shows the lifting mechanism inside the mounting base; the outer side panel is not shown. Figure 6 The center shows the lifting mechanism inside the mounting base; the outer side panel is not shown.

[0033] In some embodiments, such as Figure 3 and Figure 4 As shown, the mounting base 11 is a roughly square frame structure. It can be formed by splicing together a top plate 112, a bottom plate 111, and multiple side plates. The mounting base 11, formed by the top plate 112, bottom plate 111, and multiple side plates, has good structural strength. An internal cavity is formed within the mounting base 11, where a portion of the lifting mechanism 12 can be located, providing some protection for the lifting mechanism 12. The bottom plate 111 of the mounting base 11 can be connected to the air flotation plate 31 via screws.

[0034] Combination Figure 2 and Figure 5 Two lifting mechanisms 12 are connected to two mounting bases 11 in a one-to-one correspondence. A crossbeam 13 includes one end and another end along its length. One lifting mechanism 12 is connected to one end of the crossbeam 13, and the other lifting mechanism 12 is connected to the other end of the crossbeam 13. A coating assembly 2 is mounted on the crossbeam 13. The coating assembly 2 includes a coating head 21 and a liquid supply module for supplying coating liquid to the coating head 21. The two lifting mechanisms 12 have roughly the same structure.

[0035] Combination Figure 2 , Figure 5 and Figure 6 The lifting mechanism 12 includes a first lifting component 121 and at least two guide components 122 connected to the first lifting component 121. The at least two guide components 122 are spaced apart along a second direction. The first lifting component 121 is used to drive the at least two guide components 122 and the crossbeam 13 to move up and down along a third direction, which is the vertical direction. The guide components 122 and the mounting base 11 can be movably connected through a slide rail or slider structure, and the guide components 122 move along the third direction on the mounting base 11.

[0036] In some embodiments, such as Figure 6As shown, the first lifting assembly 121 may include a lead screw, which includes a lead rod 1212 and a nut 1213 that is pulsatorically connected to the lead rod 1212. The extension direction of the lead rod 1212 is consistent with the third direction, and the lead rod is approximately located in the central area of ​​the top surface of the air flotation plate 31. There may be two guide assemblies 122, which are spaced apart along the second direction. The two guide assemblies 122 are connected to the two ends of the nut 1213 in the second direction, respectively. The guide assemblies 122 have a suitable length along the second direction. One end of the guide assembly 122 is fixedly connected to the nut 1213, and the other end is movably connected to the mounting base 11. Thus, the lead rod and the two guide assemblies 122 form a cross structure. The center of gravity of the first lifting assembly 121 and the two guide assemblies 122 is approximately located above the center of the air flotation plate 31, effectively avoiding problems such as tilting or jamming of the air flotation plate 31 caused by the misalignment of the center of gravity of the lifting mechanism 12 with the center of the air flotation plate 31. The two guide components 122 can be connected to the ends of the crossbeam 13 via connecting seats 123. Specifically, one end of the connecting seat 123 is connected to the guide component 122, and the other end is connected to the crossbeam 13, thus connecting the lifting mechanism 12 to the crossbeam 13. Nuts 1213 drive the two guide components 122 and the crossbeam 13 to move in a third direction. This allows the four guide components 122 of the two lifting mechanisms 12 to share the load on the crossbeam 13, which is beneficial for the smoothness and stability of the lifting of the crossbeam 13.

[0037] The number of guide components 122 is set according to actual needs. For example, each lifting mechanism 12 may include four guide components 122. One end of the nut 1213 is movably connected to the mounting base 11 through two guide components 122, and the two guide components 122 are spaced apart along a first direction. The other end of the nut 1213 is movably connected to the mounting base 11 through two guide components 122, and the two guide components 122 are spaced apart along the first direction. In the second direction, two guide components 122 are located on one side of the lead screw, and the other two guide components 122 are located on the other side of the lead screw, ensuring that the center of gravity of the first lifting assembly 121 and the four guide components 122 is approximately above the center of the air flotation plate 31. For ease of description, the number of guide components 122 in each lifting mechanism 12 is described below as two.

[0038] In some embodiments, the first lifting assembly 121 includes a synchronous belt lifting mechanism, which includes a synchronous belt and a synchronous belt mounting plate. The synchronous belt rotation enables the synchronous belt mounting plate to move up and down in a third direction. There can be two guide assemblies 122, spaced apart along a second direction. The two guide assemblies 122 are mounted on the synchronous belt mounting plate and can be connected to the end of the crossbeam 13 via a connecting seat 123, thereby connecting the lifting mechanism 12 to the crossbeam 13. The synchronous belt lifting mechanism and the two guide assemblies 122 form a cross-shaped structure. The center of gravity of the first lifting assembly 121 and the two guide assemblies 122 is approximately above the center of the air flotation plate 31, effectively preventing tilting or jamming of the air flotation plate 31 due to the misalignment between the center of gravity of the lifting mechanism 12 and the center of the air flotation plate 31. The synchronous belt drives the two guide assemblies 122 and the crossbeam 13 to move along a third direction, thereby distributing the load of the crossbeam 13 through the four guide assemblies 122 of the two lifting mechanisms 12, which is beneficial to the smoothness and stability of the lifting of the crossbeam 13.

[0039] In some embodiments, the first lifting assembly 121 includes a lifting mechanism 12 capable of lifting and lowering along a third direction, such as an electric push rod, a cylinder, or a hydraulic cylinder. In some embodiments, the first lifting assembly 121 includes a gear and rack lifting mechanism, a sprocket and chain lifting mechanism, etc.

[0040] like Figure 2 As shown, the adjustment mechanism 14 includes an adjustment beam 141 and an adjustment element 142. The length of the adjustment beam 141 is adapted to the distance between the two mounting seats 11. The adjustment beam 141 can be formed by splicing multiple plate-like bodies. The adjustment beam 141 and the mounting seat 11 can be connected by screws. After the mounting seat 11 is adjusted to the correct position by the adjustment element 142, the adjustment beam 141 and the mounting seat 11 are fixedly connected. For example, the adjustment beam 141 is provided with a first connecting hole, and the mounting seat 11 is provided with a second connecting hole. The first connecting hole can be an elongated hole, and the second connecting hole can be a round hole. After the mounting seat 11 is adjusted to the correct position, bolts and nuts are installed at the first and second connecting holes to connect the adjustment beam 141 and the mounting seat 11.

[0041] In some embodiments, the adjusting member 142 can be installed at the bottom of the adjusting beam 141. The adjusting member 142 includes a set screw and a tensioning bolt, the number of which is set according to actual needs. The axial direction of the set screw is consistent with the first direction. One end of the set screw is screwed to the adjusting beam 141, and the other end of the set screw abuts against the mounting base 11. By tightening the set screw, a pushing force along the first direction is applied to the mounting base 11, and the direction of the pushing force is towards the outside of the mounting base 11. The axial direction of the tensioning bolt is consistent with the first direction. One end of the tensioning bolt is screwed to the adjusting beam 141, and the other end of the tensioning bolt is screwed to the mounting base 11. By tightening the tensioning bolt, a tensioning force along the first direction is applied to the mounting base 11. Mounting seat 11 is tilted outwards. By adjusting the tension bolt, a tension force along the first direction is applied to mounting seat 11. After mounting seat 11 is adjusted to the correct position, the verticality of lifting mechanism 12 is ensured to meet the requirements. Mounting seat 11 is tilted inwards. By adjusting the set screw, a pushing force along the first direction is applied to mounting seat 11. After mounting seat 11 is adjusted to the correct position, the verticality of lifting mechanism 12 is ensured to meet the lifting requirements.

[0042] In some embodiments, the adjusting member 142 includes a telescopic rod, the two ends of which are respectively connected to two mounting seats 11. By shortening or increasing the length of the telescopic rod, a tension force or pushing force along the first direction is applied to the mounting seats 11. After the mounting seats 11 are adjusted to the correct position, the verticality of the lifting mechanism 12 is ensured to meet the lifting requirements.

[0043] In this embodiment, the adjusting member 142 of the adjusting mechanism 14 applies a tensioning force or pushing force along the first direction to the mounting base 11 to ensure the verticality of the mounting base 11 and the lifting mechanism 12. After the mounting base 11 is adjusted to the position, the adjusting beam 141 is connected to the mounting base 11 to ensure the stability of the verticality of the two lifting mechanisms 12. The cross structure formed by the first lifting component 121 and at least two guide components 122 of the lifting mechanism 12 ensures that the center of gravity of the lifting mechanism 12 is consistent with the center of the air flotation plate 31, avoiding the problem of tilting or jamming of the air flotation plate 31, ensuring the stability of the air flotation gap between the air flotation plate 31 and the guide rail 42, thereby ensuring the coating quality. In addition, it is beneficial to the smoothness and stability of the lifting of the crossbeam 13.

[0044] In some embodiments, the first lifting assembly 121 includes a first driving member 1211, a lead screw 1212 pulsatorically connected to the first driving member 1211, and a nut 1213 screwed to the lead screw 1212. The nut 1213 is used to connect to the guide assembly 122. At least two guide assemblies 122 of each lifting mechanism 12 are connected to the crossbeam 13 through at least one connecting seat 123. The first driving member 1211 is used to drive the lead screw 1212 to rotate relative to the nut 1213 to drive at least two guide assemblies 122 and at least one connecting seat 123 to move in a third direction.

[0045] In some embodiments, combined with Figure 5 and Figure 6 The first lifting assembly 121 includes a first driving component 1211, a lead screw 1212, and a nut 1213. The first driving component 1211 includes a motor, which can be mounted on the top of the mounting base 11. One end of the lead screw 1212 is connected to the motor shaft, and the other end is connected to the base plate 111 of the mounting base 11. The axial direction of the lead screw 1212 is consistent with the third direction. The nut 1213 is screwed to the lead screw 1212. The motor drives the lead screw 1212 to rotate, thereby realizing the lifting movement of the nut 1213 along the third direction. The lead screw transmission mechanism composed of the first driving component 1211, the lead screw 1212, and the nut 1213 has smooth transmission, low vibration, and a compact structure, occupying little space.

[0046] In some embodiments, combined with Figure 5 and Figure 6 The lifting mechanism 12 includes two guide components 122, which are connected to the crossbeam 13 via a connecting seat 123. The connecting seat 123 can be a generally U-shaped plate, including two spaced-apart first connecting portions 1231 and a second connecting portion 1232 connected to the two first connecting portions 1231. Each guide component 122 may include a connecting shaft 1221, one end of which is fixedly connected to a nut 1213, and the other end is slidably connected to the mounting base 11 via a slider structure. The two first connecting portions 1231 of the connecting seat 123 are spaced apart along a second direction. The first connecting portions 1231 are sleeved on the connecting shaft 1221, and the second connecting portions 1232 are connected to the crossbeam 13 by screws. Thus, the two guide components 122 are connected to the crossbeam 13 via a connecting seat 123.

[0047] In some embodiments, the lifting mechanism 12 includes two guide components 122, which are connected to the crossbeam 13 via two connecting seats 123. The connecting seat 123 can be a generally L-shaped plate, including a first connecting portion 1231 and a connecting plate connected to the first connecting portion 1231, the connecting plate being perpendicular to the first connecting portion 1231. Each guide component 122 may include a connecting shaft 1221, one end of which is fixedly connected to a nut 1213, and the other end of which is slidably connected to the mounting base 11 via a slider structure. The first connecting portion 1231 is sleeved on the connecting shaft 1221, and the connecting plate is connected to the crossbeam 13 by screws. The two guide components 122 are connected to the crossbeam 13 in the same way, thus the two guide components 122 are connected to the crossbeam 13 via two connecting seats 123.

[0048] The first driving component 1211 drives the lead screw 1212 to rotate, causing the nut 1213 to move up and down in the third direction. The nut 1213 drives at least two guide components 122 and at least one connecting seat 123 to move in the third direction, thereby realizing the up and down movement of the crossbeam 13 in the third direction.

[0049] In this embodiment, the rotation of the lead screw 1212 causes the nut 1213 to move up and down along the axial direction of the lead screw 1212. The nut 1213 drives at least two guide components 122 and at least one connecting seat 123 to move in a third direction to achieve smooth lifting and lowering of the crossbeam 13. In addition, the lead screw 1212 and the nut 1213 occupy little space, which is conducive to improving the structural compactness of the lifting mechanism 12.

[0050] In some embodiments, combined with Figure 5 and Figure 6 The mounting base 11 includes a top plate 112, a bottom plate 111, and two first side plates 113. The two ends of the first side plates 113 are connected to the top plate 112 and the bottom plate 111, respectively. The two first side plates 113 are spaced apart along a second direction. The first side plates 113 are provided with slide rails 117. The extension direction of the slide rails 117 is parallel to a third direction. The guide assembly 122 includes a connecting shaft 1221 and a slider 1223. One end of the connecting shaft 1221 is connected to a nut 1213. The other end of the connecting shaft 1221 is slidably connected to the slide rail 117 through the slider 1223. The connecting base 123 is movably connected to the connecting shaft 1221.

[0051] In some embodiments, such as Figure 3 and Figure 4 As shown, the mounting base 11 can be a frame structure formed by splicing multiple plates. The mounting base 11 includes a top plate 112, a bottom plate 111 and two first side plates 113. The two first side plates 113 are spaced apart along a second direction, and the top plate 112 and the bottom plate 111 are spaced apart along a third direction. One end of the two first side plates 113 is connected to the top plate 112, and the other end of the two first side plates 113 is connected to the bottom plate 111.

[0052] In some embodiments, combined with Figure 5 and Figure 6The guide assembly 122 includes a connecting shaft 1221, a slider 1223, and a connecting plate 1222. One end of the connecting shaft 1221 is fixedly connected to a nut 1213, and the other end of the connecting shaft 1221 is fixedly connected to the connecting plate 1222. A clearance opening is provided on the first side plate 113, through which the other end of the connecting shaft 1221 passes, providing space for the lifting and lowering of the guide assembly 122. A slide rail 117 is mounted on the outer wall of the first side plate 113, and the slider 1223 is mounted on the connecting plate 1222. The number of sliders 1223 is set according to actual needs. In some embodiments, two slide rails 117 are spaced apart along a first direction on the outer wall of the first side plate 113, and two sets of sliders are slidably connected to the two slide rails 117 in a one-to-one correspondence. Each set of sliders includes one, two, or more sliders 1223, thereby enabling the other end of the connecting shaft 1221 to be slidably connected to the mounting base 11 through the slide rail and slider structure.

[0053] In some embodiments, such as Figure 6 As shown, the connecting seat 123 includes a first connecting part 1231 and a second connecting part 1232 connected to the first connecting part 1231. An eccentric sleeve is fitted on the connecting shaft 1221, and the eccentric sleeve is rotatably connected to the connecting shaft 1221. The first connecting part 1231 is provided with a mounting hole that penetrates the first connecting part 1231, and the eccentric sleeve is movably installed in the mounting hole of the first connecting part 1231. The nut 1213 drives the guide assembly 122 to rise and fall, and the slider 1223 slides along the extension direction of the slide rail 117 to ensure the smooth rise and fall of the crossbeam 13. During the rising and falling process, the lead screw 1212 bears lateral force due to the load of the crossbeam 13. Due to factors such as the deformation of the crossbeam 13 under stress, the lead screw 1212 and the nut 1213 may bear excessive lateral force, which will affect the verticality of the lead screw. Due to the presence of the eccentric sleeve, during the rising and falling process, the eccentric sleeve can rotate around the connecting shaft 1221 to adjust the force state of the lead screw and ensure the verticality of the lead screw 1212.

[0054] In this embodiment, one end of the connecting shaft 1221 is connected to the nut 1213, and the other end of the connecting shaft 1221 is connected to the connecting plate 1222. Multiple sliders 1223 on the connecting plate 1222 are slidably connected to the slide rail 117 on the mounting base 11. The connecting shaft 1221 ensures the connection strength between the guide assembly 122, the nut 1213, and the mounting base 11. The guide assembly 122 and the mounting base 11 are slidably connected through the slide rail and slider structure to ensure the smooth lifting and lowering of the crossbeam 13, while maintaining a compact structure. The connecting base 123 is movably connected to the connecting shaft 1221 to achieve micro-adjustment during the lifting and lowering process, ensuring the verticality of the lead screw 1212.

[0055] In some embodiments, such as Figure 6As shown, the connecting seat 123 includes two first connecting parts 1231 and a second connecting part 1232 connected to the two first connecting parts 1231. The two first connecting parts 1231 are spaced apart along the second direction. The two first connecting parts 1231 are connected one-to-one with the connecting shafts 1221 of the two guide components 122. The second connecting part 1232 is used to connect with the crossbeam 13.

[0056] In some embodiments, the first connecting portion 1231 and the second connecting portion 1232 can both be plate-shaped, and the first connecting portion 1231 and the second connecting portion 1232 can be integrally formed. The two first connecting portions 1231 are spaced apart along a second direction, and the opposite ends of the second connecting portions 1232 are respectively connected to the two first connecting portions 1231, forming a U-shaped connecting seat 123. The first connecting portion 1231 is provided with a mounting hole, through which the connecting shaft 1221 passes. An eccentric sleeve is fitted onto the connecting shaft 1221, and the eccentric sleeve is movably installed in the mounting hole of the first connecting portion 1231. The connecting shaft 1221 is movably connected to the connecting seat 123 through the eccentric sleeve.

[0057] In some embodiments, the second connecting portion 1232 is provided with connecting holes, which can be through holes. The end of the crossbeam 13 is also provided with connecting holes, which can be threaded holes. The number of connecting holes on the second connecting portion 1232 and the number of connecting holes at the end of the crossbeam 13 are equal. For example, four connecting holes are spaced apart on the second connecting portion 1232 and four connecting holes are spaced apart at the end of the crossbeam 13. Screws are screwed into the connecting holes of the second connecting portion 1232 and the connecting holes at the end of the crossbeam 13 to connect the second connecting portion 1232 and the crossbeam 13.

[0058] In this embodiment, the two guide components 122 are connected one-to-one with the two first connecting parts 1231 of the connecting seat 123, and the second connecting part 1232 is connected to the crossbeam 13. This facilitates the connecting seat 123 to evenly transmit the force of the two guide components 122 to the crossbeam 13, avoids the crossbeam 13 from tilting due to uneven force, and ensures the smooth lifting and lowering of the crossbeam 13 and its stability in a fixed position during the coating operation.

[0059] Figure 7 This is a partial sectional view of the mounting base and lifting mechanism provided in the embodiments of this application.

[0060] In some embodiments, combined with Figure 6 and Figure 7The first connecting part 1231 is movably connected to the connecting shaft 1221 through the self-aligning assembly 124. The self-aligning assembly 124 includes a rolling bearing 1241 and an eccentric sleeve 1242. The rolling bearing 1241 is sleeved on the connecting shaft 1221, and the eccentric sleeve 1242 is sleeved on the rolling bearing 1241. The eccentric sleeve 1242 is movably embedded in the first connecting part 1231.

[0061] The self-aligning assembly 124 includes a rolling bearing 1241 and an eccentric sleeve 1242. The inner ring of the rolling bearing 1241 is fixedly connected to the connecting shaft 1221, and the outer ring of the rolling bearing 1241 is fixedly connected to the eccentric sleeve 1242. The eccentric sleeve 1242 is movably mounted on the first connecting part 1231. The rotation of the outer ring of the rolling bearing 1241 relative to the inner ring drives the eccentric sleeve 1242 to rotate. The rolling bearing 1241 can be a needle roller bearing.

[0062] In some embodiments, such as Figure 7 As shown, the first connecting part 1231 is provided with a mounting hole. The mounting hole penetrates the first connecting part 1231 along its thickness direction. The mounting hole includes a first hole 12311 and a second hole 12312 arranged sequentially along its axial direction. The diameter of the first hole 12311 is smaller than the diameter of the second hole 12312. The arrangement of the first hole 12311 and the second hole 12312 makes the mounting hole a stepped hole. The connection between the first hole 12311 and the second hole 12312 forms a stepped surface.

[0063] The diameter of the first section of the connecting shaft 1221 is adapted to the diameter of the first hole 12311, and the diameter of the first section of the connecting shaft 1221 is slightly smaller than the diameter of the first hole 12311. A rolling bearing 1241 and an eccentric sleeve 1242 are installed at the second hole 12312. The rolling bearing 1241 is sleeved on the second section of the connecting shaft 1221, and the eccentric sleeve 1242 is sleeved on the rolling bearing 1241. The inner ring of the rolling bearing 1241 is fixedly connected to the connecting shaft 1221, and the outer ring of the rolling bearing 1241 is fixedly connected to the eccentric sleeve 1242. There is a suitable gap between the outer circumferential surface of the eccentric sleeve 1242 and the wall surface of the second hole 12312, thereby achieving a movable connection between the eccentric sleeve 1242 and the first connecting part 1231. The eccentric sleeve 1242 can rotate with the outer ring of the rolling bearing 1241 in the second hole 12312 to adjust the force distribution of the connecting seat 123 and the lead screw, and avoid the lead screw 1212 and nut 1213 bearing large lateral forces due to deformation of the crossbeam 13, etc., and ensure the verticality of the lead screw 1212.

[0064] In some embodiments, such as Figure 7As shown, the self-aligning assembly 124 also includes a limiting plate 1243. The limiting plate 1243 has a through hole with a diameter slightly larger than the diameter of the connecting shaft 1221. The limiting plate 1243 also has a connecting hole located at its edge. The first connecting portion 1231 has a connecting hole extending along its thickness direction from one surface of the first connecting portion 1231 towards the opposite surface. The connecting hole can be a threaded hole. The limiting plate 1243 and the first connecting portion 1231 can be connected by fasteners, including screws. The connecting shaft 1221 passes through the through hole in the limiting plate 1243, and the limiting plate 1243 abuts against one surface of the first connecting portion 1231. Screws are screwed into the connecting holes of the limiting plate 1243 and the first connecting portion 1231, thus connecting the limiting plate 1243 and the first connecting portion 1231. The axial movement of the rolling bearing 1241 and the eccentric sleeve 1242 is restricted by the limiting plate 1243.

[0065] In some embodiments, the self-aligning assembly 124 may further include an inner bearing washer and an outer bearing washer. The outer diameter of the inner bearing washer is smaller than the inner diameter of the outer bearing washer, and the outer diameter of the outer bearing washer is adapted to the diameter of the second hole 12312. The inner bearing washer is fitted onto the connecting shaft 1221 and abuts against the end face of the inner ring of the rolling bearing 1241. The outer bearing washer is fitted onto the connecting shaft 1221 and abuts against the end face of the outer ring of the rolling bearing 1241 and the end face of the eccentric sleeve 1242. The inner bearing washer restricts axial movement of the inner ring of the rolling bearing 1241. The outer bearing washer restricts axial movement of the outer ring of the rolling bearing 1241 and the eccentric sleeve 1242, ensuring the stability of the rotation of the outer ring of the rolling bearing 1241 and the eccentric sleeve 1242. In addition, the inner and outer ring gaskets of the bearing are also used to compensate for assembly tolerances and ensure that the rolling bearing 1241 and the eccentric sleeve 1242 are installed in place.

[0066] In some embodiments, the self-aligning assembly 124 further includes a bearing inner ring friction shim. The inner diameter of the bearing inner ring friction shim is adapted to the diameter of the connecting shaft 1221, and the outer diameter of the bearing inner ring friction shim is slightly smaller than the inner diameter of the bearing outer ring shim. The thickness of the bearing inner ring shim and the total thickness of the bearing inner ring friction shim are equal to or nearly equal to the thickness of the bearing outer ring shim. The bearing inner ring shim and the bearing inner ring friction shim are arranged sequentially along the axial direction of the connecting shaft 1221. The surface of the limiting plate 1243 facing the first connecting portion 1231 abuts against the end faces of the bearing inner ring friction shim and the bearing outer ring shim. The bearing inner ring friction shim can reduce end face wear, prevent the inner ring end face of the rolling bearing 1241 from being damaged, and finely adjust the axial clearance.

[0067] Nut 1213 drives the two guide components 122 and the connecting seat 123 to rise and fall vertically. The crossbeam 13 rises and falls vertically along with the connecting seat 123. During this vertical movement, the crossbeam 13 may bend and deform. This deformation causes the lead screw 1212 to bear a large lateral force, leading to a tendency for the lead screw 1212 to tilt towards the side of the crossbeam 13, affecting its verticality. To prevent the lead screw 1212 from bearing excessive lateral force and ensure its verticality, the outer ring of the rolling bearing 1241 and the eccentric sleeve 1242 rotate at an appropriate angle relative to the inner ring of the bearing during the vertical movement of the two guide components 122 and the connecting seat 123 driven by nut 1213 are adjusted.

[0068] In this embodiment, the rolling bearing 1241 is sleeved on the connecting shaft 1221, and the eccentric sleeve 1242 is sleeved on the rolling bearing 1241. The outer ring of the rolling bearing 1241 and the eccentric sleeve 1242 are rotatably installed in the mounting hole of the connecting seat 123. By rotating the outer ring of the rolling bearing 1241 and the eccentric sleeve 1242, the slight imbalance during the lifting process is adjusted, the position of the connecting shaft 1221 and the nut 1213 is corrected, and the verticality of the lead screw 1212 is ensured. The adjustment method is flexible. In addition, the rolling bearing 1241 and the eccentric sleeve 1242 occupy little space, which is conducive to the compactness of the structure.

[0069] In some embodiments, combined with Figure 2 and Figure 4 The mounting base 11 includes a second side plate 114, which is located on the side of the mounting base 11 facing the crossbeam 13 in the first direction. The second side plate 114 is connected to two first side plates 113, a top plate 112 and a bottom plate 111. The second side plate 114 has an opening 1141 for the crossbeam 13 to pass through.

[0070] In some embodiments, such as Figure 3 and Figure 4 As shown, the mounting base 11 includes a top plate 112, a bottom plate 111, two first side plates 113, and a second side plate 114. The two first side plates 113 are spaced apart along a second direction. The second side plate 114 is connected to the top plate 112, the bottom plate 111, and the two first side plates 113. The second side plate 114 is located inside the mounting base 11, that is, the second side plate 114 faces the crossbeam 13 along a first direction. The second side plate 114 helps to enhance the structural strength of the mounting base 11. It is understood that the second side plate 114 is provided with an opening 1141, which can be rectangular in shape, and the size of the opening 1141 is adapted to the size of the crossbeam 13. The end of the crossbeam 13 passes through the opening 1141 on the second side plate 114 and is connected to the connecting seat 123.

[0071] In some embodiments, such as Figure 3As shown, the mounting base 11 also includes a third side plate 115. The third side plate 115 and the second side plate 114 are spaced apart along a first direction. The top plate 112, the bottom plate 111, the two first side plates 113, the second side plate 114, and the third side plate 115 are spliced ​​together to form the mounting base 11. The third side plate 115 helps to further enhance the structural strength of the mounting base 11. A perforated hole can be provided on the third side plate 115. The shape and size of the perforated hole are not specifically limited; the shape of the perforated hole can be rectangular, circular, elliptical, etc. The perforated hole can reduce weight. In addition, through the perforated hole, part of the structure of the lifting mechanism 12 inside the mounting base 11 can be observed, and the operation of the lifting mechanism 12 can be understood. The perforated hole also facilitates the installation and disassembly of the lifting mechanism 12.

[0072] In this embodiment, by providing a second side plate 114, the structural strength of the mounting base 11 is enhanced, and the opening 1141 on the second side plate 114 provides installation space and movement space for the crossbeam 13.

[0073] In some embodiments, combined with Figure 5 and Figure 6 The lifting mechanism 12 also includes a second lifting component 125, which is connected to the crossbeam 13 via a connecting block 126. The connecting block 126 is located on the side of the connecting seat 123 away from the bottom of the mounting seat 11 in a third direction. The second lifting component 125 is used to move synchronously with the first lifting component 121 to drive the crossbeam 13 to move in a third direction.

[0074] In some embodiments, the second lifting assembly 125 includes a reciprocating mechanism such as a cylinder, hydraulic cylinder, or electric push rod. The motor of the first lifting assembly 121 is mounted on the top plate 112 of the mounting base 11, and the lead screw of the first lifting assembly 121 extends through the top plate 112 into the receiving cavity of the mounting base 11. The fixed end of the second lifting assembly 125 is fixed to the top plate 112 of the mounting base 11, and the movable end of the second lifting assembly 125 extends through the top plate 112 into the receiving cavity of the mounting base 11. The movable end of the second lifting assembly 125 is connected to the crossbeam 13 via a connecting block 126. The number of second lifting assemblies 125 is set according to actual needs; the number of second lifting assemblies 125 can be one, two, or more.

[0075] In some embodiments, the number of second lifting components 125 is one, and one second lifting component 125 is installed at the center line of the crossbeam 13.

[0076] In some embodiments, each lifting mechanism 12 has two second lifting components 125, which are spaced apart along a second direction and located on opposite sides of the first lifting component 121. The movable end of the second lifting component 125 moves up and down along a third direction. The connecting block 126 is located above the connecting seat 123 in the third direction. The connecting block 126 is placed approximately horizontally, with one end connected to the movable end and the other end connected to the crossbeam 13. By utilizing the space above the connecting seat 123 within the mounting base 11 to house the movable end of the second lifting component 125 and the connecting block 126, no additional installation space is required, which is beneficial to the compactness of the overall structure of the lifting mechanism 12. The movable end of the second lifting component 125 and the connecting block 126 are located in the receiving cavity of the mounting base 11, which provides a certain degree of protection for the second lifting component 125.

[0077] The nut 1213 of the first lifting assembly 121 drives the two guide assemblies 122 and the connecting seat 123 to move up and down along the lead screw 1212. The movable end of the second lifting assembly 125 drives the connecting block 126 to move up and down in a third direction. Both the connecting seat 123 and the connecting block 126 are connected to the crossbeam 13, and the up and down movement of the connecting block 126 and the connecting seat 123 in the third direction is synchronized. The synchronized movement of the first lifting assembly 121 and the second lifting assembly 125 drives the crossbeam 13 to move up and down in a third direction. The combined use of the first lifting assembly 121 and the second lifting assembly 125 can avoid excessive force on a single lifting assembly, which is conducive to the smooth up and down movement of the crossbeam 13. In addition, it helps to extend the service life of the first lifting assembly 121 and the second lifting assembly 125.

[0078] In this embodiment, the first lifting component 121 is connected to the crossbeam 13 via the connecting seat 123, and the second lifting component 125 is connected to the crossbeam 13 via the connecting block 126. The first lifting component 121 and the second lifting component 125 drive the crossbeam 13 to rise and fall along a third direction via the connecting seat 123 and the connecting block 126, respectively. The first lifting component 121 and the second lifting component 125 share the load of the crossbeam 13, which is beneficial to the smoothness of the lifting of the crossbeam 13. In addition, it is beneficial to extend the service life of the first lifting component 121 and the second lifting component 125. The connecting block 126 and the connecting seat 123 are spaced apart along a third direction, which is beneficial to the compactness of the overall structure of the lifting mechanism 12.

[0079] In some embodiments, the lifting mechanism 12 includes at least two second lifting components 125, which are spaced apart along a second direction, and a first lifting component 121 is located between the at least two second lifting components 125.

[0080] In some embodiments, combined with Figure 5 and Figure 6The lifting mechanism 12 includes two second lifting components 125 and a connecting block 126. The two second lifting components 125 are spaced apart along a second direction. The connecting block 126 can be a generally U-shaped plate. The connecting block 126 includes two third connecting portions 1261 and a fourth connecting portion 1262 connected to the two third connecting portions 1261. The two third connecting portions 1261 are spaced apart along the second direction. The third connecting portions 1261 are used to connect to the movable ends of the second lifting components 125, and the fourth connecting portions 1262 are used to connect to the crossbeam 13. The third connecting portions 1261 and the fourth connecting portions 1262 can both be plate-shaped and can be integrally formed.

[0081] For example, the third connecting part 1261 is provided with a connecting hole that penetrates through the third connecting part 1261. The axial direction of the connecting hole is consistent with the third direction. The movable ends of the two second lifting components 125 are connected to the connecting holes on the two third connecting parts 1261 one by one. The fourth connecting part 1262 is provided with a connecting hole that is consistent with the first direction. Screws are screwed into the connecting holes of the fourth connecting part 1262 and the connecting holes at the end of the crossbeam 13 to realize the connection between the fourth connecting part 1262 and the crossbeam 13.

[0082] The first lifting assembly 121 drives the nut 1213 to rise and fall along the lead screw 1212, and the two second lifting assemblies 125 drive the connecting block 126 to rise and fall in a third direction. The nut 1213 drives the crossbeam 13 to rise and fall through the connecting seat 123, and the two second lifting assemblies 125 drive the crossbeam 13 to rise and fall through the connecting block 126. The two second lifting assemblies 125 are symmetrically arranged about the first lifting assembly 121, which is conducive to the overall force balance of the crossbeam 13. Multiple lifting assemblies share the load of the crossbeam 13. By reducing the load on each lifting assembly, the smoothness of the lifting of the crossbeam 13 is improved.

[0083] In this embodiment, the first lifting component 121 and at least two second lifting components 125 are used in combination, which helps to reduce the load on each lifting component. The first lifting component 121 is located between at least two second lifting components 125, which helps to balance the driving force of the lifting mechanism 12, and further improves the smoothness of the lifting of the crossbeam 13.

[0084] In some embodiments, combined with Figure 5 and Figure 6 The second lifting assembly 125 includes a second driving member and a telescopic rod 1251 that is pulsatorically connected to the second driving member. The telescopic rod 1251 is used to connect to the connecting block 126, and the second driving member is used to drive the telescopic rod 1251 to move in a third direction.

[0085] In some embodiments, the second lifting assembly 125 includes a second drive member, a cylinder, and a telescopic rod 1251. The telescopic rod 1251 is movably disposed in the cylinder. The second drive member drives the telescopic rod 1251 to extend or retract relative to the cylinder. The direction of movement of the telescopic rod 1251 is consistent with a third direction. The second drive member includes an air passage through which air is introduced into the rod-side or rodless-side chamber of the cylinder, causing the telescopic rod 1251 to extend or retract.

[0086] In some embodiments, the second lifting assembly 125 includes a second driving member, a cylinder, and a telescopic rod 1251. The telescopic rod 1251 is movably disposed in the cylinder. The second driving member drives the telescopic rod 1251 to extend or retract relative to the cylinder. The direction of movement of the telescopic rod 1251 is consistent with a third direction. The second driving member includes an oil passage through which oil is supplied to the rod-side or rodless-side chamber of the cylinder, causing the telescopic rod 1251 to extend or retract.

[0087] In some embodiments, the second lifting assembly 125 may include an electric push rod, and the second driving member includes a motor, which drives the telescopic rod 1251 to move up and down in a third direction.

[0088] Taking the second lifting assembly 125 as an example, the cylinder body is mounted on the top plate 112 of the mounting base 11. The telescopic rod 1251 passes through the top plate 112 and extends into the receiving cavity of the mounting base 11. The end of the telescopic rod 1251 is provided with external threads. The end of the telescopic rod 1251 away from the cylinder body passes through the connecting hole on the third connecting part 1261 of the connecting block 126, and a nut is screwed on the external thread, thereby realizing the connection between the telescopic rod 1251 and the connecting block 126. The telescopic rod 1251 occupies little space. The two cylinders drive the crossbeam 13 to rise and fall through the two telescopic rods 1251, reducing the load acting on the first lifting assembly 121 and effectively reducing the resistance when the nut 1213 moves along the lead screw 1212.

[0089] In this embodiment, the telescopic rod 1251 of the second lifting assembly 125 is connected to the connecting block 126. The telescopic rod 1251 drives the connecting block 126 to rise and fall. The telescopic rod 1251 occupies little space, which is beneficial to the compactness of the lifting mechanism 12 structure. The second lifting assembly 125 and the first lifting assembly 121 move synchronously to drive the crossbeam 13 to rise and fall, which reduces the resistance of the nut 1213 when it moves along the screw 1212, which is beneficial to the stability and smoothness of the rise and fall of the crossbeam 13.

[0090] Figure 8 This is a second partial schematic diagram of the lifting device provided in the embodiments of this application.

[0091] In some embodiments, combined with Figure 2 and Figure 8An adjusting beam 141 is fixedly connected to a mounting plate 143 at one end near the mounting base 11. The adjusting member 142 includes a tensioning member 1421 and a pushing member 1422. The tensioning member 1421 is adjustablely disposed on the mounting plate 143, and one end of the tensioning member 1421 is adjustablely connected to the mounting base 11. The tensioning member 1421 applies a tensioning force to the mounting base 11 toward the center plane of the two lifting mechanisms 12. The pushing member 1422 is adjustablely disposed on the mounting plate 143, and one end of the pushing member 1422 abuts against the mounting base 11. The pushing member 1422 applies a pushing force to the mounting base 11 away from the center plane of the two lifting mechanisms 12.

[0092] In some embodiments, such as Figure 8 As shown, an mounting plate 143 is installed on the bottom surface of the adjusting beam 141. The mounting plate 143 is close to the mounting base 11. The mounting plate 143 can be roughly L-shaped. The mounting plate 143 includes a first mounting part and a second mounting part that are connected to each other. The first mounting part can be connected to the adjusting beam 141 by welding, screwing or other means. The second mounting part is used to install the adjusting component 142.

[0093] In some embodiments, such as Figure 8 As shown, the adjusting member 142 includes a tensioning member 1421 and a pushing member 1422. The tensioning member 1421 is used to apply a tensioning force to the mounting base 11 in a first direction, the direction of which is toward the center plane of the two lifting mechanisms 12. The pushing member 1422 is used to apply a pushing force to the mounting base 11 in a first direction, the direction of which is away from the center plane of the two lifting mechanisms 12.

[0094] The number of tensioning components 1421 and pushing components 1422 is set according to actual needs. The number of tensioning components 1421 can be one, two, or more. The number of pushing components 1422 can be one, two, or more.

[0095] In some embodiments, the tensioning member 1421 includes a tensioning bolt and a nut. One end of the tensioning bolt is screwed to the second mounting portion of the mounting plate 143, and the other end is screwed to the mounting base 11, thus connecting the mounting plate 143, the tensioning member 1421, and the mounting base 11. When the mounting base 11 is tilted outward, the tensioning bolt is tightened so that it moves toward the center plane of the two lifting mechanisms 12 until the verticality of the mounting base 11 meets the requirements. Tightening the tensioning bolt is then stopped, and a nut is screwed onto one end of the tensioning bolt. It is understood that while adjusting the tensioning bolt, the pusher 1422 is finely adjusted so that it abuts against the mounting base 11.

[0096] In some embodiments, the pusher 1422 includes a set screw, one end of which is screwed to the second mounting portion of the mounting plate 143, and the other end of which is screwed to the mounting base 11. With the mounting base 11 tilted inwards, the set screw is tightened to move it away from the center plane of the two lifting mechanisms 12 until the verticality of the mounting base 11 meets the requirements. It is understood that the tensioner 1421 is adjusted simultaneously with the set screw.

[0097] The tensioning member 1421 and the pushing member 1422 are independently configured. When the mounting base 11 is tilted inwards or outwards, adjustment of the mounting base 11 can be achieved by screwing on the tensioning member 1421 and the pushing member 1422, making operation convenient. Both ends of the adjusting beam 141 are equipped with tensioning members 1421 and pushing members 1422, allowing for individual adjustment of each mounting base 11 and improving adjustment flexibility. The tensioning member 1421 and the pushing member 1422 are installed below the adjusting beam 141, making full use of the space between the adjusting beam 141 and the crossbeam 13 without requiring additional installation space.

[0098] In some embodiments, the adjusting member 142 includes a tensioning member 1421 and a pushing member 1422, which are spaced apart along a second direction. Tightening the tensioning member 1421 applies a tensioning force toward the center plane of the two lifting mechanisms 12 to the mounting base 11, and tightening the pushing member 1422 applies a pushing force away from the center plane of the two lifting mechanisms 12 to the mounting base 11. The tensioning member 1421 and the pushing member 1422 ensure the perpendicularity of the mounting base 11 and the lifting mechanism 12.

[0099] The verticality of the mounting base 11 and the lifting mechanism 12 is ensured by adjusting the tensioning member 1421 and the pushing member 1422, thereby ensuring the stability of the air float gap between the air float plate 31 and the guide rail 42 and ensuring the smooth movement of the air float plate 31.

[0100] In this embodiment, the mounting plate 143 is fixed to the side of the adjusting beam 141 facing the mounting base 11. One end of the tensioning member 1421 is screwed to the mounting plate 143, and the other end of the tensioning member 1421 is screwed to the mounting base 11. By screwing the tensioning member 1421, a tensioning force is applied to the mounting base 11 toward the center plane of the two lifting mechanisms 12. One end of the pushing member 1422 is screwed to the mounting plate 143, and the other end of the pushing member 1422 is screwed to the mounting base 11. By screwing the pushing member 1422, a pushing force is applied to the mounting base 11 away from the center plane of the two lifting mechanisms 12. The tensioning member 1421 and the pushing member 1422 are set relatively independently, which is beneficial to the convenience and flexibility of adjustment.

[0101] In some embodiments, at least two tensioning members 1421 are located on opposite sides of the pushing member 1422, or at least two pushing members 1422 are located on opposite sides of the tensioning member 1421.

[0102] In some embodiments, such as Figure 8 As shown, the adjusting member 142 includes two tensioning members 1421 and one pushing member 1422. The two tensioning members 1421 are spaced apart along a second direction on opposite sides of the pushing member 1422. Applying tension to the mounting base 11 through the two tensioning members 1421 and applying a pushing force to the mounting base 11 through the pushing member 1422 helps to balance the force on the mounting base 11. The spaced arrangement of the two tensioning members 1421 and the pushing member 1422 along the second direction avoids occupying the lifting space of the crossbeam 13. It is understood that the two tensioning members 1421 can also be spaced apart along a third direction on opposite sides of the pushing member 1422, or they can be diagonally distributed on opposite sides of the pushing member 1422.

[0103] In some embodiments, the adjusting member 142 includes a tensioning member 1421 and two pushing members 1422, with the two pushing members 1422 spaced apart along a second direction on opposite sides of the tensioning member 1421. Applying a tensioning force to the mounting base 11 through the tensioning member 1421 and a pushing force to the mounting base 11 through the two pushing members 1422 facilitates balanced force distribution on the mounting base 11. The spaced arrangement of the tensioning member 1421 and the two pushing members 1422 along the second direction avoids obstructing the lifting space of the crossbeam 13. It is understood that the two pushing members 1422 may also be spaced apart along a third direction on opposite sides of the tensioning member 1421, or they may be diagonally distributed on opposite sides of the tensioning member 1421.

[0104] In this embodiment, by reasonably setting the number of tensioning members 1421 and pushing members 1422 and the arrangement of tensioning members 1421 and pushing members 1422, it is beneficial to balance the force on the mounting base 11, ensure the verticality of the mounting base 11 and the lifting mechanism 12, and ensure the stability of the air-float gap between the air-float plate 31 and the guide rail 42.

[0105] In some embodiments, such as Figure 8 As shown, the adjusting beam 141 has a first connecting plate 144 on the side facing the mounting base 11, and the first connecting plate 144 is located on the side of the mounting plate 143 facing the mounting base 11. The first connecting plate 144 has a first connecting hole 1441. The mounting base 11 has a second connecting plate 116, which is located on the side of the mounting plate 143 facing the mounting base 11. The second connecting plate 116 has a second connecting hole. Fasteners pass through the first connecting hole 1441 and the second connecting hole to fix the adjusting beam 141 to the mounting base 11.

[0106] In some embodiments, such as Figure 8 As shown, the first connecting plate 144 is fixed to the bottom surface of the adjusting beam 141, and the first connecting plate 144 is close to the end of the adjusting beam 141. The first connecting plate 144 and the mounting plate 143 are arranged at intervals along the first direction on the bottom surface of the adjusting beam 141, and there is a suitable distance between the first connecting plate 144 and the mounting plate 143. The bottom surface of the first connecting plate 144 is used to fit against the top surface of the top plate 112 of the mounting base 11. The length of the first connecting plate 144 in the second direction is greater than the length of the crossbeam 13 in the second direction, so that a portion of the first connecting plate 144 is exposed from the side of the crossbeam 13. The first connecting plate 144 is provided with a first connecting hole 1441. The number of first connecting holes 1441 is set according to actual needs. For example, four first connecting holes 1441 are spaced apart on the first connecting plate 144. The first connecting hole 1441 can be an elongated hole.

[0107] In some embodiments, such as Figure 8 As shown, the mounting base 11 includes a second connecting plate 116, which can be fixed to the side of the top plate 112 by welding. The top surface of the second connecting plate 116 is flush with the top surface of the top plate 112, and the second connecting plate 116 is used to fit against the first connecting plate 144. The second connecting plate 116 can also be formed by extending the top plate 112 along the first direction toward the crossbeam 13. The second connecting plate 116 has second connecting holes, the number of which is equal to the number of first connecting holes 1441. The second connecting holes can be circular holes.

[0108] In some embodiments, one end of the tensioning member 1421 is screwed to the second mounting portion of the mounting plate 143, and the other end of the tensioning member 1421 is screwed to the second connecting plate 116. One end of the pushing member 1422 is screwed to the second mounting portion of the mounting plate 143, and the other end of the pushing member 1422 abuts against the surface of the second connecting plate 116 facing the second mounting portion.

[0109] Fasteners may include bolts and nuts. After the mounting base 11 is adjusted into position by the tensioner 1421 and the pusher 1422, the bolts are passed through the first connecting hole 1441 of the first connecting plate 144 and the second connecting hole of the second connecting plate 116, and the nuts are tightened to achieve a fixed connection between the adjusting beam 141 and the mounting base 11, ensuring the stability of the verticality of the mounting base 11. The adjusting beam 141 and the mounting base 11 are fixedly connected by the first connecting plate 144, the second connecting plate 116 and the fasteners. In addition, the connection position of the adjusting beam 141 and the mounting base 11 is adjustable, which facilitates flexible adjustment of the fixed connection position of the adjusting beam 141 and the mounting base 11.

[0110] In some embodiments, such as Figure 8As shown, a reinforcing plate is provided on the bottom surface of the second connecting plate 116, and the number of reinforcing plates is set according to actual needs. The reinforcing plate can be roughly triangular in shape, with one surface of the reinforcing plate connected to the bottom surface of the second connecting plate 116 and the other surface of the reinforcing plate connected to the first side plate 113. Multiple reinforcing plates help to enhance the structural strength of the second connecting plate 116 and prevent the second connecting plate 116 from deforming due to long-term tension and pushing forces, which would affect the adjustment of the tensioning member 1421 and the pushing member 1422.

[0111] In this embodiment, the adjusting beam 141 and the mounting base 11 are fixedly connected by the first connecting plate 144, the second connecting plate 116 and fasteners to ensure that the mounting base 11 maintains the stability of verticality. The first connecting hole 1441 on the first connecting plate 144 and the second connecting hole on the second connecting plate 116 facilitate the flexible adjustment of the connection position between the adjusting beam 141 and the mounting base 11.

[0112] like Figure 1 As shown, the coating equipment provided in this embodiment includes a base 4, a moving device 3, a lifting device 1, and a coating assembly 2. The base 4 includes a base platform 41 and a guide rail 42 and an adsorption platform 43 disposed on the base platform 41. The lifting device 1 is as described above. The moving device 3 is disposed on the guide rail 42 and includes an air flotation structure. Two air flotation units of the air flotation structure are spaced apart along a first direction, and the two air flotation units move along a second direction. The lifting device 1 is connected to the two air flotation units one-to-one via two mounting seats 11. The lifting device 1 includes two lifting mechanisms 12 and a crossbeam 13 connected to the two lifting mechanisms 12. The two lifting mechanisms 12 are used to drive the crossbeam 13 to move along a third direction, where the first direction, the second direction, and the third direction are mutually perpendicular. The coating assembly 2 is mounted on the crossbeam 13. The coating assembly 2 includes a coating head 21 and a liquid supply module. The liquid supply module is used to supply coating liquid to the coating head 21, and the coating head 21 is used to coat the workpiece with the coating liquid.

[0113] In some embodiments, the base 4 is made of marble. The base 4 includes a base platform 41, an adsorption platform 43, and guide rails 42, all of which can be made of marble. The adsorption platform 43 has multiple adsorption holes and is used to adsorb the workpiece to be coated, including substrates for battery fabrication. The adsorption holes are connected to an external vacuum pump to create a negative pressure, thereby adsorbing the workpiece. Two guide rails 42 are spaced apart along a first direction. The cross-sectional shape of the guide rails 42 can be T-shaped, and the extension direction of the guide rails 42 is a second direction. The first direction is consistent with the left-right direction of the coating equipment, and the second direction is consistent with the front-back direction of the coating equipment.

[0114] In some embodiments, the air flotation structure includes two air flotation units, which are spaced apart along a first direction. Each air flotation unit includes an air bearing with an air flotation gap between it and the guide rail 42. A translation drive mechanism is used to drive the air bearing to move along the extension direction of the guide rail 42.

[0115] In some embodiments, the air flotation structure includes two air flotation units, each air flotation unit including one or more air flotation plates 31. When there are multiple air flotation plates 31 in each air flotation unit, the multiple air flotation plates 31 are arranged sequentially along a second direction. An air flotation gap exists between the air flotation plate 31 and the guide rail 42, and a translation drive mechanism is used to drive the air flotation plate 31 of each air flotation unit to move along the extension direction of the guide rail 42. The air flotation structure will be described below using the air flotation plate 31 as an example; each air flotation unit includes one air flotation plate 31.

[0116] The mobile device 3 includes two air-floating plates 31 and a translation drive mechanism. The two air-floating plates 31 are connected to two guide rails 42 in a one-to-one correspondence. There is an air-floating gap between the air-floating plates 31 and the guide rails 42. The translation drive mechanism is used to drive the two air-floating plates 31 to move along the extension direction of the guide rails 42, that is, the translation drive mechanism is used to drive the two air-floating plates 31 to move along the second direction.

[0117] The lifting device 1 includes two mounting seats 11, two lifting mechanisms 12, a crossbeam 13, and an adjusting mechanism 14. The two mounting seats 11 are connected to two air flotation plates 31 in a one-to-one manner, and the base plate 111 of the mounting seat 11 can be connected to the air flotation plate 31 by screwing. The two lifting mechanisms 12 are connected to the two mounting seats 11 in a one-to-one manner. The lifting mechanism 12 includes a first lifting component 121 and at least two guide components 122 connected to the first lifting component 121. The first lifting component 121 and at least two guide components 122 form a cross structure. The center of gravity of the first lifting component 121 and at least two guide components 122 is approximately located above the center of the air flotation plate 31, effectively avoiding problems such as tilting or jamming of the air flotation plate 31 caused by the center of gravity of the lifting mechanism 12 not being consistent with the center of the air flotation plate 31. The guide assembly 122 can be connected to the end of the crossbeam 13 via the connecting seat 123. That is, one end of the connecting seat 123 is connected to the guide assembly 122, and the other end of the connecting seat 123 is connected to the crossbeam 13, thereby realizing the connection between the lifting mechanism 12 and the crossbeam 13. By having multiple guide assemblies 122 of the two lifting mechanisms 12 share the load of the crossbeam 13, it is beneficial to the smoothness and stability of the lifting of the crossbeam 13.

[0118] The coating assembly 2 is installed on the crossbeam 13. The coating assembly 2 includes a coating head 21 and a liquid supply module. The liquid supply module supplies coating liquid to the coating head 21. The air flotation plate 31 moves in the second direction to coat the workpiece with the coating liquid.

[0119] In some embodiments, the adjustment mechanism 14 includes an adjustment beam 141, a tensioning member 1421, and a pushing member 1422. The tensioning member 1421 and the pushing member 1422 are independently arranged. When the mounting seat 11 is tilted inward or outward, the mounting seat 11 can be adjusted by turning the tensioning member 1421 and the pushing member 1422 to ensure the verticality of the mounting seat 11 and the lifting mechanism 12. Both ends of the adjustment beam 141 are provided with tensioning members 1421 and pushing members 1422, enabling individual adjustment of each mounting seat 11 and improving adjustment flexibility.

[0120] In some embodiments, the coating equipment further includes a cleaning device for cleaning the coating head 21. The cleaning device is connected to a cleaning fluid supply device, which supplies cleaning fluid to the cleaning device. The cleaning device includes two sets of cleaning components arranged opposite each other. Each set of cleaning components includes a cleaning nozzle and an air outlet nozzle, with the air outlet nozzle located on both sides of the cleaning nozzle. Each set of cleaning components is driven by a servo motor via a belt. A gap is provided between the two sets of cleaning components to accommodate the die lip, facilitating the cleaning of the coating head 21. A cleaning tank is provided below the two sets of cleaning components, and waste liquid is discharged through a pipe at the bottom of the waste liquid tank after cleaning.

[0121] The coating equipment with the above-mentioned lifting device 1 applies a tensioning force or a pushing force along the first direction to the mounting base 11 through the tensioning member 1421 and the pushing member 1422 of the adjusting mechanism 14 to ensure the verticality of the mounting base 11 and the lifting mechanism 12. After the mounting base 11 is adjusted into place, the adjusting beam 141 is connected to the mounting base 11 to ensure the stability of the verticality of the two lifting mechanisms 12. The cross structure formed by the first lifting component 121 and at least two guide components 122 of the lifting mechanism 12 ensures that the center of gravity of the lifting mechanism 12 is consistent with the center of the air flotation plate 31, effectively avoiding the problem of tilting or jamming of the air flotation plate 31, ensuring the stability of the air flotation gap between the air flotation plate 31 and the guide rail 42, thereby ensuring the coating quality. In addition, it is beneficial to the smoothness and stability of the lifting of the crossbeam 13.

[0122] In some embodiments, the coating equipment further includes a control device, which includes a position detection module and a controller. The lifting mechanism 12, the moving device 3, and the position detection module are all communicatively connected to the controller. The position detection module includes a first position detection unit and a second position detection unit. The first position detection unit is used to detect the position of the coating head 21 relative to the workpiece to be coated in a second direction, and the second detection unit is used to detect the position of the coating head 21 relative to the workpiece to be coated in a third direction. The position of the coating head 21 in the second direction includes a starting position and an ending position, and the position of the coating head 21 in the third direction includes a first height position and a second height position. The controller is used to receive the position signal from the position detection module and control the lifting action of the lifting mechanism 12 and the horizontal movement of the air flotation plate 31. The first position detection unit and the second position detection unit include, but are not limited to, photoelectric sensors, Hall sensors, limit switches, etc.

[0123] The first position detection unit detects that the coating head 21 is in the starting position. The controller controls the lifting mechanism 12 to move according to the position signal from the first position detection unit. The first lifting component 121 and the second lifting component 125 drive the crossbeam 13 to move up and down along a third direction until the second position detection unit detects that the coating head 21 is at the first height position. At this point, the gap between the coating head 21 and the workpiece to be coated meets the coating requirements, and the controller controls the lifting mechanism 12 to stop moving. Then, the controller controls the translation drive mechanism to drive the air flotation plate 31 to move along a second direction. The first position detection unit detects that the coating head 21 has moved to the termination position, indicating that one coating operation is complete, and the controller controls the translation drive mechanism to stop moving. Then the controller controls the first lifting component 121 and the second lifting component 125 to drive the crossbeam 13 to rise and fall along the third direction until the second position detection unit detects that the coating head 21 is at the second height position. At this time, the gap between the coating head 21 and the workpiece to be coated is large, which meets the return requirement of the coating head 21. The controller controls the lifting mechanism 12 to stop moving. At the same time, the controller controls the translation drive mechanism to drive the air float 31 to move along the second direction to the starting position, thus completing one coating operation cycle.

[0124] The position detection module and controller ensure the intelligent operation of the coating equipment, reduce manual intervention, and help improve coating quality and efficiency.

[0125] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A lifting device (1), said lifting device (1) being connected to a moving device (3) of a coating equipment, characterized in that, The lifting device (1) includes: Mounting base (11), two mounting bases (11) are spaced apart along the first direction and are respectively used to connect the air flotation plate (31) of the mobile device (3). A crossbeam (13) is disposed between the two mounting bases (11) and is used to mount the coating assembly (2). Lifting mechanism (12), two lifting mechanisms (12) are connected one-to-one with two mounting seats (11), and the two lifting mechanisms (12) are respectively connected to both ends of the crossbeam (13); each lifting mechanism (12) includes a first lifting component (121) and at least two guide components (122) connected to the first lifting component (121), the at least two guide components (122) of each lifting mechanism (12) are spaced apart along a second direction, the guide components (122) are movably connected to the mounting seat (11) along a third direction, the first lifting component (121) is used to drive the at least two guide components (122) and the crossbeam (13) to move along a third direction; wherein, the first direction, the second direction and the third direction are perpendicular to each other, and the third direction is a vertical direction; The adjustment mechanism (14) includes an adjustment beam (141) and an adjustment member (142). The adjustment beam (141) is adjustablely connected to the mounting base (11) via the adjustment member (142). The adjustment member (142) is used to apply a tension force or a pushing force to the mounting base (11) in the first direction.

2. The lifting device (1) according to claim 1, characterized in that, The first lifting assembly (121) includes a first driving member (1211), a lead screw (1212) that is drivenly connected to the first driving member (1211), and a nut (1213) that is screwed to the lead screw (1212). The nut (1213) is used to connect with the guide assembly (122). The at least two guide assemblies (122) of each lifting mechanism (12) are connected to the crossbeam (13) through at least one connecting seat (123). The first driving member (1211) is used to drive the lead screw (1212) to rotate relative to the nut (1213) so as to drive the at least two guide assemblies (122) and the at least one connecting seat (123) to move along the third direction.

3. The lifting device (1) according to claim 2, characterized in that, The mounting base (11) includes a top plate (112), a bottom plate (111), and two first side plates (113). The two ends of the first side plates (113) are respectively connected to the top plate (112) and the bottom plate (111). The two first side plates (113) are spaced apart along the second direction. The first side plates (113) are provided with slide rails (117). The extension direction of the slide rails (117) is parallel to the third direction. The guide assembly (122) includes a connecting shaft (1221) and a slider (1223). One end of the connecting shaft (1221) is connected to the nut (1213). The other end of the connecting shaft (1221) is slidably connected to the slide rail (117) through the slider (1223). The connecting base (123) is movably connected to the connecting shaft (1221).

4. The lifting device (1) according to claim 3, characterized in that, The connecting seat (123) includes two first connecting parts (1231) and a second connecting part (1232) connected to the two first connecting parts (1231). The two first connecting parts (1231) are spaced apart along the second direction. The two first connecting parts (1231) are connected one-to-one with the connecting shafts (1221) of the two guide components (122). The second connecting part (1232) is used to connect with the crossbeam (13).

5. The lifting device (1) according to claim 4, characterized in that, The first connecting part (1231) is movably connected to the connecting shaft (1221) through a self-aligning assembly (124). The self-aligning assembly (124) includes a rolling bearing (1241) and an eccentric sleeve (1242). The rolling bearing (1241) is sleeved on the connecting shaft (1221), and the eccentric sleeve (1242) is sleeved on the rolling bearing (1241). The eccentric sleeve (1242) is movably embedded in the first connecting part (1231).

6. The lifting device (1) according to claim 3, characterized in that, The mounting base (11) includes a second side plate (114), which is located on one side of the mounting base (11) facing the crossbeam (13) along the first direction. The second side plate (114) is connected to the two first side plates (113), the top plate (112), and the bottom plate (111). The second side plate (114) has an opening (1141) for the crossbeam (13) to pass through.

7. The lifting device (1) according to any one of claims 2-6, characterized in that, The lifting mechanism (12) further includes a second lifting component (125), which is connected to the crossbeam (13) via a connecting block (126). The connecting block (126) is located on the side of the connecting seat (123) away from the bottom of the mounting seat (11) along the third direction. The second lifting component (125) is used to move synchronously with the first lifting component (121) to drive the crossbeam (13) to move along the third direction.

8. The lifting device (1) according to claim 7, characterized in that, The lifting mechanism (12) includes at least two second lifting components (125), which are spaced apart along the second direction, and the first lifting component (121) is located between the at least two second lifting components (125).

9. The lifting device (1) according to claim 7, characterized in that, The second lifting assembly (125) includes a second driving member and a telescopic rod (1251) that is pulsatorically connected to the second driving member. The telescopic rod (1251) is used to connect to the connecting block (126), and the second driving member is used to drive the telescopic rod (1251) to move along the third direction.

10. The lifting device (1) according to any one of claims 1-6, 8 and 9, characterized in that, The adjusting beam (141) is fixedly connected to a mounting plate (143) at one end near the mounting base (11). The adjusting member (142) includes a tensioning member (1421) and a pushing member (1422). The tensioning member (1421) is adjustablely disposed on the mounting plate (143), and one end of the tensioning member (1421) is adjustablely connected to the mounting base (11). The tensioning member (1421) is used to apply a tensioning force to the mounting base (11) toward the center plane of the two lifting mechanisms (12). The pushing member (1422) is adjustablely disposed on the mounting plate (143), and one end of the pushing member (1422) abuts against the mounting base (11). The pushing member (1422) is used to apply a pushing force to the mounting base (11) away from the center plane of the two lifting mechanisms (12).

11. The lifting device (1) according to claim 10, characterized in that, At least two of the tensioning members (1421) are located on opposite sides of the pushing member (1422), or at least two of the pushing members (1422) are located on opposite sides of the tensioning member (1421).

12. The lifting device (1) according to claim 10, characterized in that, The adjusting beam (141) has a first connecting plate (144) on the side facing the mounting base (11), and the first connecting plate (144) is located on the side of the mounting plate (143) facing the mounting base (11). The first connecting plate (144) has a first connecting hole (1441). The mounting base (11) has a second connecting plate (116), which is located on the side of the mounting plate (143) facing the mounting base (11). The second connecting plate (116) has a second connecting hole. Fasteners pass through the first connecting hole (1441) and the second connecting hole to fix the adjusting beam (141) to the mounting base (11).

13. A coating apparatus, characterized in that, include: The base (4) includes a base platform (41) and a guide rail (42) and an adsorption platform (43) disposed on the base platform (41). The moving device (3) is located on the guide rail (42). The moving device (3) includes an air flotation structure. Two air flotation units of the air flotation structure are spaced apart along a first direction, and the two air flotation units move along a second direction. The lifting device (1) as described in any one of claims 1-12 is connected to the two air flotation units one-to-one via two mounting bases (11). The lifting device (1) includes two lifting mechanisms (12) and a crossbeam (13) connected to the two lifting mechanisms (12). The two lifting mechanisms (12) are used to drive the crossbeam (13) to move along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The coating assembly (2) is mounted on the crossbeam (13). The coating assembly (2) includes a coating head (21) and a liquid supply module. The liquid supply module is used to supply coating liquid to the coating head (21). The coating head (21) is used to coat the workpiece with the coating liquid.

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