阅读说明：本技术 一种自动化喷涂装置及喷涂系统 (Automatic change spraying device and paint finishing ) 是由 梁远标 舒淦 谢杨宇 于 2020-10-29 设计创作，主要内容包括：本发明提供了一种自动化喷涂装置及喷涂系统,该自动化喷涂装置包括提升装置、喷枪组件、扫描装置和控制箱,所述提升装置包括底座和喷涂装置本体,所述喷涂装置本体包括竖向轨道和转动轴,所述竖向轨道滑动连接于所述底座,所述转动轴滑动连接于所述竖向轨道；所述转动轴还可相对所述竖向轨道转动,所述喷枪组件固定连接于所述转动轴,所述提升装置、喷枪组件和扫描装置皆与所述控制箱电性连接；该自动化喷涂装置及喷涂系统可以实现对大型工件及复杂工件的自动化喷涂。(The invention provides an automatic spraying device and a spraying system, wherein the automatic spraying device comprises a lifting device, a spray gun assembly, a scanning device and a control box, the lifting device comprises a base and a spraying device body, the spraying device body comprises a vertical rail and a rotating shaft, the vertical rail is connected to the base in a sliding manner, and the rotating shaft is connected to the vertical rail in a sliding manner; the rotating shaft can also rotate relative to the vertical track, the spray gun assembly is fixedly connected to the rotating shaft, and the lifting device, the spray gun assembly and the scanning device are all electrically connected with the control box; the automatic spraying device and the spraying system can realize automatic spraying of large-sized workpieces and complex workpieces.)

1. An automatic spraying device is characterized by comprising a lifting device, a spray gun assembly, a scanning device and a control box, wherein the lifting device comprises a base and a spraying device body, the spraying device body comprises a vertical rail and a rotating shaft, the vertical rail is connected to the base in a sliding mode, and the rotating shaft is connected to the vertical rail in a sliding mode; the rotating shaft can also rotate relative to the vertical track, the spray gun assembly is fixedly connected to the rotating shaft, and the lifting device, the spray gun assembly and the scanning device are electrically connected with the control box.

2. The automated spray coating device of claim 1,

the scanning device scans a workpiece to obtain scanning data and sends the scanning data to the control box;

the control box obtains position information and spraying information of the base, the vertical track and the rotating shaft according to scanning data, sends the position information to the lifting device and sends the spraying information to the spray gun assembly;

the base, the vertical track and the rotating shaft automatically move according to the position information;

and the spray gun carries out spraying operation on the workpiece according to the spraying information.

3. The automated spray coating device of claim 2 wherein said vertical rail moves said spray coating device body with said workpiece during spraying.

4. The automated spray device of claim 3, wherein the spray gun assembly is closed after a spray process is completed and the spray device body and the spray assembly are automatically repositioned.

5. The automated spray coating device of claim 1 wherein said spray gun assembly comprises a plurality of spray guns arranged in a square along the length of said rotatable shaft.

6. The automated spray coating device of claim 1 wherein said vertical track comprises a primary rail, a secondary rail, a travel mechanism and a first drive mechanism, said primary rail being fixed to said secondary rail, said primary rail and said secondary rail being parallel to each other and spaced apart, and both said primary rail and said secondary rail being movably connected to said travel mechanism; the first driving mechanism is connected with the main rail and used for driving the traveling mechanism to reciprocate along the length direction of the main rail and the secondary rail, an auxiliary guide wheel connected with the traveling mechanism is further arranged between the main rail and the secondary rail, and the auxiliary guide wheel is abutted to the main rail.

7. The automatic spraying device of claim 6, wherein the travelling mechanism comprises a travelling frame and a plurality of travelling wheels, the travelling frame comprises a connecting piece, the connecting piece comprises a first connecting piece and a second connecting piece, a first fixing piece and a second fixing piece are respectively arranged on two sides of the first connecting piece, and the connecting box is fixedly connected with the first connecting piece through the first fixing piece and the second fixing piece.

8. The automatic spraying device of claim 6, wherein the traveling mechanism comprises a traveling frame and a plurality of traveling wheels, the traveling frame is sleeved outside the secondary rail and the main rail, the traveling wheels are fixed with the traveling frame, and the traveling wheels are respectively abutted against the secondary rail and the main rail and can roll along the secondary rail and the main rail.

9. The automatic spraying device according to any one of claims 6 to 8, wherein a plurality of reinforcing rods are further arranged between the primary rail and the secondary rail, the reinforcing rods are arranged at intervals along the length direction of the primary rail or the secondary rail, one end of each reinforcing rod is fixedly connected with the primary rail, and the other end of each reinforcing rod is fixedly connected with the secondary rail; the secondary rail comprises a first rail bar and a second rail bar, the first rail bar and the second rail bar are arranged oppositely, and the first rail bar and the second rail bar are fixed with the reinforcing rod.

10. A painting system comprising a workpiece track along which the workpiece is moved and an automated painting apparatus according to any one of claims 1 to 9, the automated painting system being provided on one or both sides of the workpiece track.

Technical Field

The invention belongs to the technical field of spraying, and particularly relates to an automatic spraying device and a spraying system.

Background

The spraying operation is a very important link in the manufacturing industry, the spraying is a technological method of applying uniformly and finely dispersed mist or powder paint on the surface of a workpiece by a spray gun or a disc type atomizer and by means of pressure or centrifugal force, equipment for spraying the workpiece is called as a lifting device, and the lifting device used in industrial production can drive the spray gun to move so as to realize batch spraying operation or flow operation. However, in the existing spraying and coating device, the Z-axis stroke of the reciprocating machine is about 1700mm generally, the X-axis stroke is about 1200mm generally, the reciprocating machine is not matched with an R axis, the reciprocating machine needs to return to the original point first in the application process, the corresponding speed is slow, the stroke is short, only conventional workpieces can be processed, and the spraying efficiency of large workpieces is low. The problem of low powdering rate at positions difficult to spray, such as corner positions, welding positions, etc., cannot be solved.

Disclosure of Invention

In view of the above, the present invention provides a spraying apparatus and a spraying system capable of automatically spraying large and complex workpieces.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

an automatic spraying device comprises a lifting device, a spray gun assembly, a scanning device and a control box, wherein the lifting device comprises a base and a spraying device body, the spraying device body comprises a vertical rail and a rotating shaft, the vertical rail is connected to the base in a sliding mode, and the rotating shaft is connected to the vertical rail in a sliding mode; the rotating shaft can also rotate relative to the vertical track, the spray gun assembly is fixedly connected to the rotating shaft, and the lifting device, the spray gun assembly and the scanning device are electrically connected with the control box.

Preferably, the scanning device scans the workpiece to obtain scanning data and sends the scanning data to the control box;

the control box obtains position information and spraying information of the base, the vertical track and the rotating shaft according to the scanning data, sends the position information to the lifting device and sends the spraying information to the spray gun assembly;

the base, the vertical track and the rotating shaft automatically move according to the position information;

and the spray gun carries out spraying operation on the workpiece according to the spraying information.

Preferably, in the spraying process, the vertical rail drives the spraying device body to move along with the workpiece.

Preferably, after a spraying process is completed, the spray gun assembly is closed, and the spraying device body and the spraying assembly are automatically reset.

Preferably, the spray gun assembly comprises a plurality of spray guns arranged in a square along the length of the rotatable shaft.

Preferably, the vertical rail comprises a main rail, a secondary rail, a traveling mechanism and a first driving mechanism, the main rail is fixed with the secondary rail, the main rail and the secondary rail are parallel to each other and arranged at intervals, and the main rail and the secondary rail are both movably connected with the traveling mechanism; the first driving mechanism is connected with the main rail and used for driving the traveling mechanism to reciprocate along the length direction of the main rail and the secondary rail, an auxiliary guide wheel connected with the traveling mechanism is further arranged between the main rail and the secondary rail, and the auxiliary guide wheel is abutted to the main rail.

Preferably, running gear includes walking frame and a plurality of walking wheel, the walking frame includes the connection piece, the connection piece includes first connecting piece and second connecting piece, the both sides of first connecting piece are equipped with first stationary blade and second stationary blade respectively, the connecting box through first stationary blade and second stationary blade with even first connecting piece fixed connection.

Preferably, running gear includes walking frame and a plurality of walking wheel, walking frame cover is located outside vice rail, the main rail, the walking wheel with the walking frame is fixed mutually, just the walking wheel respectively with vice rail and main rail looks butt and can follow vice rail and main rail roll.

Preferably, a plurality of reinforcing rods are further arranged between the primary rail and the secondary rail, the reinforcing rods are arranged at intervals along the length direction of the primary rail or the secondary rail, one end of each reinforcing rod is fixedly connected with the primary rail, and the other end of each reinforcing rod is fixedly connected with the secondary rail; the secondary rail comprises a first rail bar and a second rail bar, the first rail bar and the second rail bar are arranged oppositely, and the first rail bar and the second rail bar are fixed with the reinforcing rod.

The invention also provides a spraying system which comprises a workpiece track and the automatic spraying device of any one of the above parts, wherein the workpiece moves along the workpiece track, and the automatic spraying system is arranged on one side or two sides of the workpiece track.

The spraying device is provided with the base, the vertical shaft and the rotating shaft, the spraying component is fixed on the rotating shaft, and during spraying, the spraying component can move along with a workpiece, can adjust the spraying height and angle of the spraying component according to the size and position of the workpiece, can read the large workpiece for spraying, and can also spray special positions of complex workpieces, such as welding seams, corners and the like.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic view of the overall structure of an automated coating apparatus according to a preferred embodiment of the present invention;

FIG. 2 is a partially exploded schematic view of a lifting device according to a preferred embodiment of the present invention;

FIG. 3 is a partially exploded schematic view of the vertical rail of the preferred embodiment of the present invention;

FIG. 4 is an enlarged partial view of the slide assembly of the preferred embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of the base of the preferred embodiment of the present invention;

FIG. 6 is an exploded view of the control box of the preferred embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a base in accordance with a preferred embodiment of the present invention;

FIG. 8 is an enlarged view of the tensioner of the preferred embodiment of the present invention;

fig. 9 is a flow chart of the operation of the spray coating device of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the illustrated embodiments are not intended to limit the present invention, and in the present embodiments, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention; in addition, in the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a welding fixing manner, a pin fixing manner, or the like, which is commonly used in the prior art, and therefore, detailed description thereof is omitted in this embodiment.

As shown in fig. 1 to 9, the present embodiment provides an automatic spraying device, which includes a lifting device, a spray gun assembly 100, a scanning device and a control box 2, wherein the lifting device includes a base 3 and a spraying device body, and the spraying device body includes a vertical rail 1 and a rotating shaft 61. Vertical track 1 sliding connection makes spray gun subassembly 100 can slide along base 3 on the base 3, and in the spraying process, this spray gun subassembly 100 can move along with the work piece, and in the spraying process, the work piece need not stop, and spraying efficiency is higher. Rotating shaft 61 sliding connection is in vertical track 1, and the spraying in-process, spraying assembly can reciprocate along vertical track 1, and the spraying scope is bigger. The rotating shaft 61 can also rotate relative to the vertical track 1, the spray gun assembly 100 is fixedly connected to the rotating shaft 61, and the rotating shaft 61 can change the spraying direction of the spraying assembly, so that the spraying device can spray workpieces with complex shapes, and the spraying work can be completed at one time after the spraying device, and other spray guns do not need to be arranged, so that the equipment is saved. The lifting device, the spray gun assembly 100 and the scanning device are electrically connected with the control box 2, and the control box 2 controls the lifting device and the spray gun assembly 100 to move according to the information acquired by the scanning device and the internal programming, so that automatic spraying is realized.

In a preferred embodiment, the spraying process comprises the steps of:

1) the scanning device scans the workpiece to obtain scan data including the size and shape of the workpiece, and transmits the scan data to the control box 2. Specifically, the scanning device is an infrared scanning device or a laser scanning device.

2) The control box 2 obtains the position information and the spraying information of the base 3, the vertical rail 1 and the rotating shaft 61 according to the scanning data, and sends the position information to the lifting device, and the lifting device adjusts the position of the spray gun assembly 100 according to the position information, such as the position relative to the base 3, the position relative to the vertical rail 1 and the rotating angle of the rotating shaft 61. And sending the spraying information to the spray gun assembly 100, and adjusting the spraying amount and the spraying time of the spray gun by the spray gun assembly 100 according to the spraying information.

3) The base 3, the vertical rail 1 and the rotation shaft 61 are automatically moved according to the position information, thereby adjusting the position of the spray gun assembly 100.

4) And the spray gun carries out spraying operation on the workpiece according to the spraying information.

In the preferred embodiment, the vertical rail 1 drives the spraying device body to move along with the workpiece in the spraying process. The accompanying meaning is that the spraying device and the workpiece move simultaneously and in the same direction, and the moving speed may be the same or different. Further, the moving speed of the spraying device is the same as the moving speed of the workpiece.

In the preferred embodiment, after a spray process is completed, the spray gun assembly 100 is shut off and the spray device body and spray assembly are automatically reset.

The spraying process comprises the following specific steps:

1) the scanning device and the controller monitor the appearance characteristics of the workpiece, promote the operation of the device and perform independent thread management of fault alarm respectively, and ensure the efficient operation of a control system;

2) the method comprises the following steps of firstly, acquiring and monitoring appearance characteristics of a workpiece, operating a lifting device and simultaneously operating a fault alarm, unlocking non-execution mechanism communication when the lifting device operates to a standby point, waiting for the workpiece to enter, and monitoring appearance characteristic data of the workpiece and characteristic data of the workpiece in real time to perform queue sequencing;

3) analyzing the acquired workpiece characteristics, acquiring numerical values of the corner positions and the bordering positions of the workpiece based on the reference origin of the workpiece, and converting the successively-appearing position coordinate information into operation angle data of a Y axis, a Z axis and an R axis for queue sorting storage;

4) after a workpiece arrives, starting the spray gun assembly 100 to perform spraying operation, triggering and extracting operation angle data of a Y axis, a Z axis and an R axis to perform queue sequencing data, locking a communication channel of a non-execution mechanism, avoiding the occupation of the communication channel, and simultaneously recording the current position information of each axis;

5) judging whether the machining is finished, if so, closing the spray gun assembly 100 to return to a standby position and unlocking a communication channel to wait for the entering of the next workpiece, otherwise, sending new position information to drive the spraying operation of the Y axis, the Z axis and the R axis;

6) and monitoring fault information in real time, processing fault content in time, and stopping the reciprocating engine and spraying operation for major faults.

In the preferred embodiment, the spray gun assembly 100 includes a plurality of spray guns arranged in a square along the length of the rotating shaft 61.

In a preferred embodiment, the vertical track 1 comprises a main track 4, a secondary track 5, a traveling mechanism 6 and a first driving mechanism, wherein the main track 4 is fixed with the secondary track 5, the main track 4 and the secondary track 5 are parallel to each other and are arranged at intervals, and the main track 4 and the secondary track 5 are movably connected with the traveling mechanism 6; the first driving mechanism is connected with the main rail 4 and used for driving the traveling mechanism 6 to reciprocate along the length directions of the main rail 4 and the auxiliary rail 5, an auxiliary guide wheel connected with the traveling mechanism 6 is further arranged between the main rail 4 and the auxiliary rail 5, and the auxiliary guide wheel is abutted to the main rail 4.

In a preferred embodiment, the walking mechanism 6 comprises a walking frame 8 and a plurality of walking wheels 9, the walking frame 8 comprises a connecting piece, the connecting piece comprises a first connecting piece and a second connecting piece, a first fixing piece and a second fixing piece are respectively arranged on two sides of the first connecting piece, and the connecting box is fixedly connected with the first connecting piece through the first fixing piece and the second fixing piece.

In a preferred embodiment, the traveling mechanism 6 comprises a traveling frame 8 and a plurality of traveling wheels 9, the traveling frame 8 is sleeved outside the secondary rail 5 and the main rail 4, the traveling wheels 9 are fixed with the traveling frame 8, and the traveling wheels 9 are respectively abutted against the secondary rail 5 and the main rail 4 and can roll along the secondary rail 5 and the main rail 4.

In a preferred embodiment, a plurality of reinforcing rods 11 are further arranged between the primary rail 4 and the secondary rail 5, the reinforcing rods 11 are arranged at intervals along the length direction of the primary rail 4 or the secondary rail 5, one end of each reinforcing rod 11 is fixedly connected with the primary rail 4, and the other end of each reinforcing rod 11 is fixedly connected with the secondary rail 5.

In the preferred embodiment, the secondary rail 5 includes a first rail 12 and a second rail 13, the first rail 12 being disposed opposite the second rail 13, and both the first rail 12 and the second rail 13 being secured to the stiffener 11.

Set up base 3, vertical axis and axis of rotation 61, the spraying subassembly is fixed on axis of rotation 61, and during the spraying, the spraying subassembly can move along with the work piece, also can read large-scale work piece and carry out the spraying according to the height and the angle that the size and the position adjustment spraying subassembly of work piece sprayed, also can carry out the spraying to the special position of complicated work piece, like the spraying of positions such as welding seam, turning.

In a preferred embodiment, the vertical rail 1 and the base 3 are perpendicular to each other and fixedly connected, the control box 2 is fixed with the vertical rail 1 or the base 3, and the control box 2 in this embodiment is fixed on the vertical rail 1; vertical track 1 includes main rail 4, accessory rail 5, running gear 6 and first actuating mechanism 7, and main rail 4 is fixed mutually with accessory rail 5, and main rail 4 is parallel to each other and the interval sets up with accessory rail 5, and main rail 4 and accessory rail 5 all with running gear 6 swing joint, and first actuating mechanism 7 is connected with main rail 4 and is used for driving running gear 6 along the length direction reciprocating motion of main rail 4, accessory rail 5. The end face, far away from the secondary rail 5, of the travelling mechanism 6 is a fixed end used for being connected with a spray gun, an auxiliary guide wheel 10 connected with the travelling mechanism 6 is further arranged between the main rail 4 and the secondary rail 5, and the auxiliary guide wheel 10 is far away from the fixed end and is abutted to the main rail 4. Specifically, an auxiliary guide wheel 10 connected with the traveling mechanism 6 is additionally arranged between the main rail 4 and the auxiliary rail 5, so that the auxiliary guide wheel 10 and a traveling wheel 9 in the traveling mechanism 6 bear force together; when the acting force or the offset load force from the spray gun assembly on the travelling mechanism 6 is partially shared by the auxiliary guide wheel 10, the travelling mechanism 6 can integrally improve the offset load resistance, and the influence on the stable and reliable use of the lifting device caused by the accelerated abrasion or damage of the travelling wheel 9 due to stress is reduced; the walking wheels in this embodiment are provided with 16 walking wheels, four walking wheels 9 are respectively arranged at the upper end and the lower end of the walking frame 8, two walking wheels are respectively arranged at the two sides of the main rail 4 and the auxiliary rail 5, wherein each group of two walking wheels 9 abutting against the auxiliary rail 5 respectively form an included angle of 90 degrees. The mutual matching of the main rail 4 and the auxiliary rail 5 improves the overall rigidity, reduces the flexible deformation of the main rail 4 caused by the load on the travelling mechanism 6, and further reduces the distance deviation of a muzzle relative to a workpiece when a spray gun mounted on the travelling mechanism 6 reciprocates. A plurality of auxiliary guide wheels 10 are further provided between the main rail 4 and the subsidiary rail 5, the auxiliary guide wheels 10 are located on both sides of the main rail 4 and abut against the main rail 4, and the auxiliary guide wheels 10 are fixed to the walking frame 8, four auxiliary guide wheels 10 are provided in this embodiment, and the auxiliary device guide wheels 10 are located on both upper and lower ends of the walking frame 8 two by two and abut against both sides of the main rail; the auxiliary guide wheel 10 can disperse or reduce the force applied to the walking wheel 9 by the load, or the part of the walking wheel 9 abutting against the main rail 4 is mutually matched with the auxiliary guide wheel 10 to be held or clamped on the main rail 4, so that the force applied to the lifting device during loading is mainly borne by the main rail 4, and the radial tension applied to the auxiliary rail 5 by the load is also reduced.

In the preferred embodiment, a rotating power mechanism is fixed on the traveling mechanism 6, the rotating shaft 61 is connected with the rotating power mechanism, the rotating power mechanism drives the rotating shaft to rotate, the spray gun assembly is fixed on the rotating shaft, and the rotating shaft rotates to drive the spray gun assembly to rotate, so that the spraying direction of the spray gun assembly is changed.

As shown in fig. 2 and 8, the main rail 4 is further provided with a tensioning device, which includes a tensioning support 23 and an adjusting pull rod 24, the tensioning support 23 is fixed to the main rail 4 by bolts, one end of the adjusting pull rod 24 is connected to the tensioning support 23, the other end is rotatably connected to the driven wheel 21, and the pull rod is used for adjusting the distance between the driven wheel 21 and the driving wheel. The two adjusting rods 24 are disposed on both sides of the driven wheel 21 and connected to both ends of the rotating shaft thereof, and the other end of the adjusting rod 24 is connected to the tension support 23, for example, by screwing with nuts. After the lifting device is used for a period of time, the first driving belt 22 is loosened, the nut matched with the adjusting pull rod 24 is adjusted to further pull the driven wheel 21 to be away from the first driving wheel 20, and then the first driving belt 22 is tensioned again, so that the phenomenon that slipping or tooth jumping easily occurs after the first driving belt 22 is loosened is avoided, and the reliable or stable use of the lifting device is further influenced.

As shown in fig. 2-3, in a preferred embodiment, a plurality of reinforcing rods 11 are further disposed between the primary rail 4 and the secondary rail 5, the reinforcing rods 11 are arranged at intervals along the length direction of the primary rail 4 or the secondary rail 5, one end of each reinforcing rod 11 is fixedly connected with the primary rail 4, and the other end of each reinforcing rod 11 is fixedly connected with the secondary rail 5, and the reinforcing rods 11 in this embodiment are disposed in a T shape; the reinforcing rod 11 is fixedly connected with the main rail 4 and the auxiliary rail 5, so that the rigidity of the main rail 4 or the auxiliary rail 5 as a whole can be further enhanced, and meanwhile, the reinforcing rod 11 can further reduce the radial tension on the auxiliary rail 5 caused by load; for example, in the present example, a load (lance assembly) is attached to the primary rail 4 on the side opposite the control box 2, and the secondary rail 5 is subjected to a radial tension which pulls it towards the primary rail during use of the lifting device, the reinforcing rods 11 then eliminating or reducing this radial tension to which the secondary rail 5 is subjected, thereby further increasing the rigidity of the primary rail 4 and the secondary rail 5 as a whole.

As shown in fig. 2-3, in the preferred embodiment, the secondary rail 5 includes a first rail 12 and a second rail 13, the first rail 12 being disposed opposite the second rail 13, and both the first rail 12 and the second rail 13 being secured to the stiffener 11. The first rail 12 is L-shaped, the second rail 13 has the same structure as the first rail 12, and the bend deformation resistance of the secondary rail 5 can be improved due to the secondary rail 5 consisting of the L-shaped first rail 12 and the L-shaped second rail 13. In a preferred embodiment, the lifting device further comprises a protective shell 31, the protective shell 31 is wrapped and fixed on the primary rail 4 and the secondary rail 5, and the protective shell 31 can reduce or prevent foreign matters and dust from entering the lifting device, so that the reliable and stable operation of the lifting device is affected.

As shown in fig. 1 and 6, in a preferred embodiment, the control box 2 includes a box body 15 having an opening 14 on one side, an equipment mounting seat 16, a sliding groove 17 and a cover plate 18, the sliding groove 17 is fixed in the box body 15 by bolts, one end of the equipment mounting seat 16 is slidably connected with the sliding groove 17, and the other end is fixedly connected with the cover plate 18, the equipment mounting seat 16 can extend or retract relative to the box body 15, the cover plate 18 covers the opening 14 when the equipment mounting seat 16 retracts, and when the lifting device needs maintenance or repair, the equipment mounting seat 16 can be moved relative to the sliding groove 17 and placed outside the box body 15 by pulling the cover plate 18; it is possible to make the equipment mounted on the equipment mounting seat completely exposed to the cabinet 15 for easier maintenance or repair.

As shown in fig. 3-5, in a preferred embodiment, the main rail 4 is a hollow tubular arrangement, and the hollow tubular main rail 4 helps to reduce the overall weight of the lifting device. The first driving mechanism 7 comprises a first driving motor 19, a first driving wheel 20, a driven wheel 21 and a first driving belt 22, the first driving wheel 20 and the driven wheel 21 are respectively connected to two ends of the main rail 4 in a rotating mode, the first driving motor 19 is fixed to the main rail 4 through bolts, a driving shaft of the first driving motor 19 is in transmission connection with the first driving wheel 20, the first driving belt 22 is in transmission connection with the first driving wheel 20 and the driven wheel 21, one side of the first driving belt 22 penetrates through the main rail 4, the walking frame is fixed to the first driving belt 22, and one side of the first driving belt 22 penetrates through the main rail 4 to reduce the size of the lifting device. When the first driving motor 19 drives the first driving belt 22 to move through the first driving pulley 20 and the driven pulley 21, the movement of the first driving belt 22 drives the walking frame 8 to move along the main rail 4 and the auxiliary rail 5.

As shown in fig. 7, in the preferred embodiment, the base 3 comprises a chassis 25, a slide carriage 26 and a second driving mechanism, the slide carriage 26 is slidably connected with the chassis 25, the second driving mechanism is connected with the slide carriage 26, and the second driving mechanism is used for driving the slide carriage 26 to move horizontally on the chassis 25. Specifically, the second driving mechanism includes a second driving motor 27, a second driving wheel 28, a pressing wheel 29 and a second transmission belt 30, the second driving motor 27 is fixed to the slide seat 26 through bolts, the second driving wheel 28 is connected to a driving shaft of the second driving motor 27, two ends of the second transmission belt 30 are respectively fixed to two ends of the chassis 25, the transmission belt is in transmission connection with the second driving wheel 28, the pressing wheel 29 is provided with two parts, the two parts are respectively located on two sides of the second driving wheel 28, the second transmission belt 30 is pressed onto the second driving wheel 28, and the pressing wheel 29 is fixedly connected to the slide seat 26. So that the lifting device can drive, for example, the spray gun to move in the vertical direction and also in the horizontal direction. In this embodiment, the second belt 30 and the first belt 22 are synchronous belts, but a chain may be used.

The invention also provides a spraying system which comprises a workpiece track and the automatic spraying device, wherein the workpiece moves along the workpiece track, and the automatic spraying system is arranged on one side or two sides of the workpiece track. When large workpieces are sprayed, the automatic spraying system is arranged on two sides, so that the spraying efficiency can be improved. Specifically, the workpiece rail is a chain type suspension rail or a rail for supporting the workpiece.

The main rail, the auxiliary rail and the auxiliary guide wheel which is arranged between the main rail and the auxiliary rail and connected with the walking mechanism are respectively arranged, namely, the auxiliary guide wheel and the walking wheel in the walking mechanism bear force together; specifically, when the acting force or the unbalance loading force from the spray gun assembly on the travelling mechanism is partially shared by the auxiliary guide wheel, the travelling mechanism can integrally improve the bearing capacity or the unbalance loading resistance capacity, the failure rate of the lifting force loading device in use is reduced, and the stability and the reliability of the lifting force loading device in use are improved.

The above-mentioned embodiments only express the specific embodiments of the invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.