A lifting device and a spraying device

Abstract

The present invention provides a lifting device and a spraying device, comprising a guide rail assembly, an electrical box and a machine base, wherein the guide rail assembly is connected to the machine base, the electrical box is fixed to the guide rail assembly or the machine base, the guide rail assembly comprises a main rail, a secondary rail, a traveling mechanism and a first driving mechanism, the main rail and the secondary rail are parallel to each other and arranged at intervals, the main rail and the secondary rail are both connected to the traveling mechanism, an auxiliary guide wheel connected to the traveling mechanism is also arranged between the main rail and the secondary rail, the auxiliary guide wheel is away from the fixed end and abuts against the main rail; it also comprises one or more spray guns, a workpiece track and a connecting rod, the workpiece track is used to hang or support the workpiece and move it, the lifting devices are respectively located on both sides of the workpiece track, the two ends of the connecting rod are respectively connected to the lifting devices, the spray gun is located between the lifting devices and connected to the connecting rod, and the spray gun faces the inner and outer side walls of the workpiece to be sprayed; the invention has the advantages of reasonable structure and stable and reliable use.

Description

Technical Field

[0001] The invention belongs to the technical field of spraying equipment, and in particular relates to a lifting device and a spraying device. Background Art

[0002] Spraying operation is a very important link in the manufacturing industry. Spraying is a process method that uses a spray gun or a disc atomizer and with the help of pressure or centrifugal force to apply a uniform and fine mist or powder coating to the surface of a workpiece. The equipment for spraying the workpiece is called a lifting device. The lifting device used in industrial production can drive the spray gun to move to achieve batch spraying operations or assembly line operations. However, the lifting device in the prior art affects the spraying effect of the workpiece due to the eccentric load when in use. Specifically, the main reason is that in order to increase the spraying area of ​​the spraying, it is often necessary to form an array of multiple spray guns and fix them on the guide rail assembly, and the spray gun often has a certain length and weight. When multiple spray guns are superimposed, the guide rail assembly, especially the traveling mechanism on the guide rail assembly, will be subjected to a large load or eccentric load, which will aggravate the wear of the traveling mechanism or make it easy to be damaged, for example, aggravate the wear of the bearing shaft and the traveling wheel or make it easy to be damaged; specifically, since one end of the spray gun is fixed on the traveling mechanism and the other end extends away from the traveling mechanism, the spray gun will be affected by gravity and form a downward pulling force, so that the spray gun is equivalent to forming a lever and then the force it receives is applied to the traveling mechanism. In particular, the longer the spray gun is, the more obvious the force acting on the traveling mechanism will be. Therefore, the traveling mechanism is subjected to the pulling force from the spray gun, and the spray gun is often only fixed on one side of the traveling mechanism, thereby forming the above-mentioned eccentric load or eccentric load force applied to the traveling mechanism. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a lifting device and a spraying device with a reasonable structure, stability and reliability.

[0004] In order to solve the above technical problems, the technical solution used in the present invention is:

[0005] A lifting device comprises a guide rail assembly, an electrical box and a machine base, wherein the guide rail assembly is connected to the machine base, the electrical box is fixed to the guide rail assembly or the machine base, the guide rail assembly comprises a main rail, a secondary rail, a traveling mechanism and a first driving mechanism, the main rail is fixed to the secondary rail, the main rail and the secondary rail are parallel to each other and arranged at intervals, the main rail and the secondary rail are both connected to the traveling mechanism, the first driving mechanism is installed on the main rail and is used to drive the traveling mechanism to reciprocate along the length direction of the main rail, the end face of the traveling mechanism away from the secondary rail is a fixed end for connecting a spray gun, and an auxiliary guide wheel connected to the traveling mechanism is also arranged between the main rail and the secondary rail, the auxiliary guide wheel is away from the fixed end and abuts against the main rail.

[0006] As a further improvement to the lifting device, the walking mechanism includes a walking frame and a plurality of walking wheels. The walking frame is mounted outside the auxiliary rail and the main rail, the walking wheels are fixed to the walking frame, and the walking wheels are respectively in contact with the auxiliary rail and the main rail and can roll along the auxiliary rail and the main rail.

[0007] As a further improvement to the lifting device, a plurality of auxiliary guide wheels are provided, wherein the auxiliary guide wheels are connected at both ends of the walking frame in the length direction and / or the auxiliary guide wheels are respectively located at both sides of the walking frame, and the wheel surfaces of the auxiliary guide wheels abut against the two ends of the guide rail in the width direction.

[0008] As a further improvement to the lifting device, a plurality of reinforcing rods are arranged between the main rail and the auxiliary rail. The reinforcing rods are arranged at intervals along the length direction of the main rail or the auxiliary rail. One end of the reinforcing rod is fixedly connected to the main rail, and the other end is fixedly connected to the auxiliary rail.

[0009] As a further improvement of the lifting device, the first driving mechanism includes a first driving motor, a first driving wheel, a driven wheel, and a first transmission belt. The first driving wheel and the driven wheel are respectively rotatably connected to the two ends of the main rail. The first driving motor is fixed to the main rail and is transmission-connected to the first driving wheel. The first transmission belt is transmission-connected to the first driving wheel and the driven wheel. The walking frame is fixed to the first transmission belt.

[0010] As a further improvement to the lifting device, the main rail is arranged in a hollow tubular shape, and one side of the first transmission belt passes through the main rail.

[0011] As a further improvement to the lifting device, the auxiliary rail includes a first rail and a second rail, the first rail and the second rail are arranged opposite to each other, and both the first rail and the second rail are fixed to the reinforcing rod.

[0012] As a further improvement to the lifting device, the base includes a chassis, a slide and a second driving mechanism, the slide is slidably connected to the chassis, the second driving mechanism is connected to the slide, and the second driving mechanism is used to drive the slide to move horizontally on the chassis; the second driving mechanism includes a second driving motor, a second driving wheel, a pressure wheel and a second transmission belt, the second driving motor is fixed to the slide, the second driving wheel is connected to the second driving motor, the two ends of the second transmission belt are respectively fixed to the two ends of the chassis, and the transmission belt is transmission-connected to the second driving wheel, two pressure wheels are provided, and the pressure wheels are respectively located on both sides of the second driving wheel and press the second transmission belt onto the second driving wheel.

[0013] A spraying device comprises a lifting device and a spray gun, wherein the lifting device is the lifting device as described above, the spray gun is connected to a traveling mechanism of the lifting device, and the lifting device is used to drive the spray gun to reciprocate.

[0014] As a further improvement to the spraying device, it further comprises an extension arm, one end of which is fixedly connected to the walking mechanism, and the spray gun is fixedly connected to the extension arm;

[0015] The extension direction of the extension arm is perpendicular to the movement direction of the walking mechanism, and the spray gun sprays along the extension direction of the extension arm; or,

[0016] The extension direction of the extension arm is perpendicular to the movement direction of the walking mechanism, and a plurality of spray guns are fixed on each extension arm, and the spraying direction of the spray guns is perpendicular to the extension direction of the extension arm; or,

[0017] The extension arm comprises a first extension arm and a second extension arm, the extension direction of the first extension arm is perpendicular to the movement direction of the walking mechanism, the second extension arm is fixed on the first extension arm, the extension direction of the second extension arm is parallel to the walking direction of the walking mechanism, the spray gun is fixed on the second extension arm, and the spraying direction of the spray gun forms an angle with the extension direction of the second extension arm; or,

[0018] The extension arm includes a first extension arm, a second extension arm and a third extension arm. The extension direction of the first extension arm is perpendicular to the movement direction of the walking mechanism. The second extension arm is fixed on the first extension arm. The extension direction of the second extension arm is parallel to the walking direction of the walking mechanism. The third extension arm forms an angle with the second extension arm. The spray gun is fixed on the third extension arm. The spraying direction of the spray gun forms an angle with the third extension arm.

[0019] The beneficial effects of the present invention are mainly reflected in: since an auxiliary guide wheel connected to the traveling mechanism is added between the main rail and the auxiliary rail, that is, the auxiliary guide wheel and the traveling wheel in the traveling mechanism bear the force together; specifically, when the traveling mechanism is subjected to the force from the spray gun assembly or the eccentric load pulling force, a part of it will be shared by the auxiliary guide wheel, so that the traveling mechanism and the main rail and the auxiliary rail cooperate with each other and improve the bearing capacity or the ability to resist eccentric load as a whole, and at the same time reduce the aggravated wear of the traveling mechanism caused by the eccentric load force; therefore, the lifting device and the spraying device can operate more stably and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of a lifting device in the present invention;

[0022] Figure 2 It is an incomplete exploded schematic diagram of a lifting device in the present invention;

[0023] Figure 3 It is an incomplete exploded schematic diagram of a guide rail device in a lifting device of the present invention;

[0024] Figure 4 It is a partial enlarged view of a walking mechanism of a lifting device in the present invention;

[0025] Figure 5 It is a partial enlarged view of a base of a lifting device in the present invention;

[0026] Figure 6 It is an exploded view of an electrical box of a lifting device in the present invention;

[0027] Figure 7 It is a structural schematic diagram of a machine base of a lifting device in the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention. In the present embodiment, it should be understood that the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, in the present specific embodiment, if the connection or fixing method between the components is not particularly specified, the connection or fixing method may be bolt fixing, welding fixing, pin fixing, etc. commonly used in the prior art, and therefore, it will not be described in detail in the present embodiment.

[0029] like Figure 1-7As shown, this embodiment provides a lifting device, including a guide rail assembly 1, an electrical box 2 and a machine base 3, the guide rail assembly 1 and the machine base 3 are perpendicular to each other and fixedly connected, the electrical box 2 is fixed to the guide rail assembly 1 or the machine base 3, and the electrical box 2 in this embodiment is fixed on the guide rail assembly 1; wherein, the guide rail assembly 1 includes a main rail 4, an auxiliary rail 5, a traveling mechanism 6 and a first driving mechanism 7, the auxiliary rail 5 is fixed to the main rail 4, and the auxiliary rail 5 and the main rail 4 are parallel to each other and far away from each other, the end surface of the traveling mechanism 6 away from the auxiliary rail 5 is a fixed end for installing and connecting a spray gun, the traveling mechanism 6 is connected to the main rail 4 and the auxiliary rail 5, the first driving mechanism 7 is fixed to the main rail 4 or the auxiliary phase and is used to drive the traveling mechanism 6 to reciprocate along the length direction of the main rail 4 and the auxiliary rail 5, and the electrical box 2 is a pull-out type electrical box 2. The travel mechanism 6 includes a travel frame 8 and a plurality of travel wheels 9. The travel frame 8 is hollow and sleeved outside the auxiliary rail 5 and the main rail 4. The travel wheels 9 are fixed to the travel frame 8 by bolts, and the travel wheels 9 are respectively in contact with the auxiliary rail 5 and the main rail 4 and can roll along the length direction of the auxiliary rail 5 and the main rail 4. In this embodiment, there are 16 travel wheels, and the travel wheels 9 are respectively arranged at the upper and lower ends of the travel frame 8 in groups of four and four and are respectively located on both sides of the main rail 4 and the auxiliary rail 5 in groups of two, wherein the two travel wheels 9 in each group that are in contact with the auxiliary rail 5 are at an angle of 90 degrees to each other. The mutual cooperation between the main rail 4 and the auxiliary rail 5 improves the overall rigidity, reduces the amount of flexible deformation of the main rail 4 caused by the load on the travel mechanism 6, and thus reduces the distance deviation of the spray gun installed on the travel mechanism 6 relative to the workpiece during reciprocating motion. A plurality of auxiliary guide wheels 10 are also provided between the main rail 4 and the auxiliary 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. In this embodiment, four auxiliary guide wheels 10 are provided, and the auxiliary guide wheels 10 are located at the upper and lower ends of the walking frame 8 in pairs and abut against both sides of the main rail in pairs, that is, the wheel surfaces of the auxiliary guide wheels 10 abut against the two ends in the width direction of the main rail. The auxiliary guide wheels 10 cooperate with the straight wheels 9 and cooperate with the walking frame 8 to form an embrace between the main rail 4 and the auxiliary rail 5, so as to disperse or reduce the force exerted on the walking wheel mechanism 6 due to the load, or in other words, the part of the walking wheel 9 abutting against the main rail 4 cooperates with the auxiliary guide wheels 10 to hold or clamp on the main rail 4, so that the force of the lifting device when loaded is mainly borne by the main rail 4, while also reducing the radial tension exerted on the auxiliary rail 5 due to the load.

[0030] like Figure 2-3As shown, in a preferred embodiment, a plurality of reinforcing rods 11 are further provided between the main rail 4 and the auxiliary rail 5, and the reinforcing rods 11 are arranged at intervals along the length direction of the main rail 4 or the auxiliary rail 5, one end of the reinforcing rod 11 is fixedly connected to the main rail 4, and the other end is fixedly connected to the auxiliary rail 5, and the reinforcing rod 11 in this embodiment is arranged in a T shape; the reinforcing rod 11 is fixedly connected to the main rail 4 and the auxiliary rail 5, thereby further enhancing the rigidity of the main rail 4 or the auxiliary rail 5 as a whole, and at the same time, the reinforcing rod 11 can further reduce the radial tension exerted on the auxiliary rail 5 due to the load; for example, in this example, a load (spray gun assembly) is connected to the side of the main rail 4 relative to the electrical box 2, then during the use of the lifting device, the auxiliary rail 5 will be subjected to a radial tension that pulls it toward the main rail, and at this time, the reinforcing rod 11 can eliminate or reduce the radial tension exerted on the auxiliary rail 5, thereby further improving the rigidity of the main rail 4 and the auxiliary rail 5 as a whole.

[0031] like Figure 2-3 As shown, in a preferred embodiment, the auxiliary rail 5 includes a first rail 12 and a second rail 13, the first rail 12 and the second rail 13 are arranged opposite to each other, and the first rail 12 and the second rail 13 are both fixed to the reinforcing rod 11. The first rail 12 is L-shaped, and the second rail 13 has the same structure as the first rail 12. Since the auxiliary rail 5 composed of the first rail 12 and the second rail 13 arranged in an L-shape can improve the ability of the auxiliary rail 5 to resist bending deformation. In a preferred embodiment, the lifting device also includes a protective shell 31, which is wrapped and fixed on the main rail 4 and the auxiliary rail 5. The protective shell 31 can reduce or prevent foreign matter and dust from entering the guide rail assembly, thereby affecting the reliable and stable operation of the lifting device.

[0032] like Figure 1 , Figure 6 As shown, in a preferred embodiment, the electrical box 2 includes a box body 15 with an opening 14 on one side, an equipment mounting base 16, a slide groove 17 and a cover plate 18. The slide groove 17 is fixed in the box body 15 by bolts. One end of the equipment mounting base 16 is slidably connected to the slide groove 17, and the other end is fixedly connected to the cover plate 18. The equipment mounting base 16 can be extended or retracted relative to the box body 15, and the cover plate 18 covers the opening 14 when the equipment mounting base 16 is retracted. When the lifting device needs maintenance or repair, the cover plate 18 can be pulled to move the equipment mounting base 16 relative to the slide groove 17 and place it outside the box body 15; the equipment installed on the equipment mounting base can be completely exposed to the box body 15, making it easier to maintain or repair.

[0033] like Figure 3-5As shown, in a preferred embodiment, the main rail 4 is arranged in a hollow tubular shape, and the hollow tubular main rail 4 helps to reduce the overall weight of the lifting device. The first driving mechanism 7 includes a first driving motor 19, a first driving wheel 20, a driven wheel 21, and a first transmission belt 22. The first driving wheel 20 and the driven wheel 21 are respectively rotatably connected to the two ends of the main rail 4. The first driving motor 19 is fixed to the main rail 4 by bolts, and the driving shaft of the first driving motor 19 is transmission-connected to the first driving wheel 20. The first transmission belt 22 is transmission-connected to the first driving wheel 20 and the driven wheel 21, and one side of the first transmission belt 22 passes through the main rail 4. The walking frame is fixed to the first transmission belt 22, and one side of the first transmission belt 22 passes through the main rail 4, which helps to reduce the volume of the guide rail assembly. When the first driving motor 19 drives the first transmission belt 22 to move through the first driving wheel 20 and the driven wheel 21, the movement of the first transmission belt 22 can drive the walking frame 8 to move along the main rail 4 and the auxiliary rail 5.

[0034] like Figure 3 As shown, in a preferred embodiment, a tensioning device is also provided on the main rail 4, which includes a tensioning support 23 and an adjusting rod 24. The tensioning support 23 is fixed to the main rail 4 by bolts. One end of the adjusting rod 24 is connected to the tensioning support 23, and the other end is rotatably connected to the driven wheel 21. The rod is used to adjust the distance of the driven wheel 21 relative to the driving wheel. In this embodiment, two adjusting rods 24 are provided, which are respectively located on both sides of the driven wheel 21 and connected to both ends of its rotating shaft. The other end of the adjusting rod 24 is connected to the tensioning support 23, for example, by screwing a nut. After the lifting device is used for a period of time, the first transmission belt 22 becomes loose, and the driven wheel 21 is pulled away from the first driving wheel 20 by adjusting the nut that cooperates with the adjusting rod 24, and then the first transmission belt 22 is re-tensioned, thereby avoiding the phenomenon that the first transmission belt 22 is prone to slipping or jumping teeth after being loose, thereby affecting the reliable or stable use of the lifting device.

[0035] like Figure 7As shown, in a preferred embodiment, the base 3 includes a chassis 25, a slide 26 and a second driving mechanism, the slide 26 is slidably connected to the chassis 25, the second driving mechanism is connected to the slide 26, and the second driving mechanism is used to drive the slide 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 pressure wheel 29 and a second transmission belt 30, the second driving motor 27 is fixed to the slide 26 by bolts, the second driving wheel 28 is connected to the driving shaft of the second driving motor 27, the two ends of the second transmission belt 30 are respectively fixed to the two ends of the chassis 25, and the transmission belt is connected to the second driving wheel 28 in a transmission manner, two pressure wheels 29 are provided and are respectively located on both sides of the second driving wheel 28 and the second transmission belt 30 is pressed against the second driving wheel 28, and the pressure wheel 29 is fixedly connected to the slide 26. Thus, the lifting device can drive, for example, a spray gun to move in the vertical direction, and can also move in the horizontal direction. In this embodiment, the second transmission belt 30 and the first transmission belt 22 are both synchronous belts. Of course, a transmission chain can also be used.

[0036] This embodiment also provides a spraying device, including a lifting device and a spray gun, wherein the lifting device is the lifting device as described above, the spray gun is connected to the traveling mechanism of the lifting device, and the lifting device is used to drive the spray gun to reciprocate, thereby driving the spray gun to spray the workpiece. In a preferred embodiment, it also includes an extension arm, one end of the extension arm is fixedly connected to the traveling mechanism, the spray gun is fixedly connected to the extension arm, and the spray gun sprays along the extension direction of the extension arm; the extension direction of the extension arm is perpendicular to the movement direction of the traveling mechanism, wherein the extension direction of the extension arm is within a certain angle range relative to the traveling mechanism, for example, the extension arm is inclined 10-20 degrees relative to the traveling mechanism, and the extension direction of the extension arm can be considered to be perpendicular to the movement direction of the traveling mechanism, and each extension arm is fixed with multiple spray guns, and the spraying direction of the spray gun is perpendicular to the extension direction of the extension arm; in this embodiment, the spraying device can be used to spray the top wall or bottom wall of the workpiece.

[0037] In another embodiment, the extension arm includes a first extension arm and a second extension arm, wherein the extension direction of the first extension arm is perpendicular to the movement direction of the walking mechanism, the second extension arm is fixed on the first extension arm, the extension direction of the second extension arm is parallel to the walking direction of the walking mechanism, and when the extension direction of the second extension arm has a certain inclination angle with the walking direction of the walking mechanism, such as 10-20 degrees, it can be considered that the extension direction of the second extension arm is parallel to the walking direction of the walking mechanism; the spray gun is fixed on the second extension arm, and the spraying direction of the spray gun is at an angle to the extension direction of the second extension arm; in this embodiment, the spraying device can spray the outer wall or inner wall of the workpiece.

[0038] In another embodiment, the extension arm includes a first extension arm, a second extension arm and a third extension arm, the extension direction of the first extension arm is perpendicular to the movement direction of the walking mechanism, the second extension arm is fixed on the first extension arm, the extension direction of the second extension arm is parallel to the walking direction of the walking mechanism, the third extension arm is at an angle with the second extension arm, such as a 90-degree angle, the spray gun is arranged and fixed along the length direction of the third extension arm, and the spraying direction of the spray gun is at an angle with the third extension arm, such as a 90-degree angle; in this embodiment, the spraying device can spray the bottom wall inside the workpiece, specifically, when spraying the box workpiece with a top opening, the second extension arm acts as a hanging arm to send the third extension arm to the bottom wall of the box workpiece, at this time, the third extension arm is arranged relative to the width direction of the box workpiece, and the multiple spray guns fixed on the third extension arm can form a spray coverage in the width direction of the bottom arm of the box workpiece, and when the box workpiece moves relative to its length direction or the spraying device moves relative to the length direction of the box workpiece, the bottom wall of the box workpiece can be sprayed in length and width.

[0039] The beneficial effects of the present invention are mainly reflected in: since an auxiliary guide wheel connected to the traveling mechanism is added between the main rail and the auxiliary rail, that is, the auxiliary guide wheel and the traveling wheel in the traveling mechanism bear the force together; specifically, when the traveling mechanism is subjected to the force from the spray gun assembly or the eccentric load pulling force, a part of it will be shared by the auxiliary guide wheel, so that the traveling mechanism and the main rail and the auxiliary rail cooperate with each other and improve the bearing capacity or the ability to resist eccentric load as a whole, and at the same time reduce the aggravated wear of the traveling mechanism caused by the eccentric load force; therefore, the lifting device and the spraying device can operate more stably and reliably.

[0040] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A lifting device, comprising a guide rail assembly, an electrical box and a machine base, wherein the guide rail assembly is connected to the machine base, and the electrical box is fixed to the guide rail assembly or the machine base, characterized in that: The guide rail assembly includes a main rail, an auxiliary rail, a traveling mechanism and a first driving mechanism, wherein the main rail is fixed to the auxiliary rail, the main rail and the auxiliary rail are parallel to each other and are arranged at intervals, the main rail and the auxiliary rail are both connected to the traveling mechanism, the first driving mechanism is installed on the main rail and is used to drive the traveling mechanism to reciprocate along the length direction of the main rail, the end surface of the traveling mechanism away from the auxiliary rail is a fixed end for connecting a spray gun, and an auxiliary guide wheel connected to the traveling mechanism is also arranged between the main rail and the auxiliary rail, the auxiliary guide wheel is away from the fixed end and abuts against the main rail; The walking mechanism comprises a walking frame and a plurality of walking wheels, wherein the walking frame is sleeved outside the auxiliary rail and the main rail, the walking wheels are fixed to the walking frame, and the walking wheels are respectively in contact with the auxiliary rail and the main rail and can roll along the auxiliary rail and the main rail; The auxiliary guide wheels are provided in plurality, the auxiliary guide wheels are connected at both ends of the traveling frame in the length direction and the auxiliary guide wheels are respectively located at both sides of the traveling frame, and the wheel surfaces of the auxiliary guide wheels abut against both ends of the main rail in the width direction; A plurality of reinforcing rods are further arranged between the main rail and the auxiliary rail, and the reinforcing rods are arranged at intervals along the length direction of the main rail or the auxiliary rail, one end of the reinforcing rod is fixedly connected to the main rail, and the other end is fixedly connected to the auxiliary rail; the main rail is arranged in a hollow tubular shape; The auxiliary rail includes a first rail and a second rail. The first rail is arranged opposite to the second rail, and both the first rail and the second rail are fixed to the reinforcing rod.

2. The lifting device according to claim 1, characterized in that: The first driving mechanism includes a first driving motor, a first driving wheel, a driven wheel, and a first transmission belt. The first driving wheel and the driven wheel are rotatably connected to the two ends of the main rail respectively. The first driving motor is fixed to the main rail and is drivingly connected to the first driving wheel. The first transmission belt is drivingly connected to the first driving wheel and the driven wheel. The walking frame is fixed to the first transmission belt.

3. The lifting device according to claim 2, characterized in that: One side of the first transmission belt passes through the main rail.

4. The lifting device according to claim 1, characterized in that: The machine base includes a chassis, a slide and a second driving mechanism, the slide is slidably connected to the chassis, the second driving mechanism is connected to the slide, and the second driving mechanism is used to drive the slide to move horizontally on the chassis; the second driving mechanism includes a second driving motor, a second driving wheel, a pressure wheel and a second transmission belt, the second driving motor is fixed to the slide, the second driving wheel is connected to the second driving motor, the two ends of the second transmission belt are respectively fixed to the two ends of the chassis, and the transmission belt is transmission-connected to the second driving wheel, two pressure wheels are provided, and the pressure wheels are respectively located on both sides of the second driving wheel and press the second transmission belt onto the second driving wheel.

5. A spraying device, comprising a lifting device and a spray gun, characterized in that: The lifting device is the lifting device described in any one of claims 1 to 4, the spray gun is connected to a traveling mechanism of the lifting device, and the lifting device is used to drive the spray gun to reciprocate.

6. The spraying device according to claim 5, characterized in that: It also includes an extension arm, one end of which is fixedly connected to the walking mechanism, and the spray gun is fixedly connected to the extension arm; The extension direction of the extension arm is perpendicular to the movement direction of the walking mechanism, and the spray gun sprays along the extension direction of the extension arm; or, The extension direction of the extension arm is perpendicular to the movement direction of the walking mechanism, and a plurality of spray guns are fixed on each extension arm, and the spraying direction of the spray guns is perpendicular to the extension direction of the extension arm; or, The extension arm comprises a first extension arm and a second extension arm, the extension direction of the first extension arm is perpendicular to the movement direction of the walking mechanism, the second extension arm is fixed on the first extension arm, the extension direction of the second extension arm is parallel to the walking direction of the walking mechanism, the spray gun is fixed on the second extension arm, and the spraying direction of the spray gun forms an angle with the extension direction of the second extension arm; or, The extension arm includes a first extension arm, a second extension arm and a third extension arm. The extension direction of the first extension arm is perpendicular to the movement direction of the walking mechanism. The second extension arm is fixed on the first extension arm. The extension direction of the second extension arm is parallel to the walking direction of the walking mechanism. The third extension arm forms an angle with the second extension arm. The spray gun is fixed on the third extension arm. The spraying direction of the spray gun forms an angle with the third extension arm.

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