Multi-station automatic paint spraying equipment for forklift support cover

Abstract

The present application relates to the technical field of paint spraying, in particular to a multi-station automatic paint spraying equipment for forklift support cover, which comprises a paint spraying manipulator and a material changing table, the material changing table cooperates with the paint spraying manipulator to change workpieces as the paint spraying objects of the paint spraying manipulator, and further comprises a paint blocking mechanism, the material changing table is provided with the paint blocking mechanism, the surface of the forklift support cover that needs to be sprayed is an A surface, the surface of the forklift support cover that does not need to be sprayed is a B surface, and the paint blocking mechanism is used for preventing paint from adhering to the B surface, the paint blocking mechanism comprises a support installed on the material changing table, the support is provided with a material seat used for loading workpieces, the material seat cooperates with the B surface of the workpieces, and when the workpieces are placed on the material seat, the surface of the material seat is attached to the B surface of the workpieces, and the paint blocking mechanism can prevent paint from adhering to the finish surface of the forklift support cover in the paint spraying process without affecting the processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of paint spraying technology, specifically to a multi-station automatic painting equipment for forklift support covers. Background Technology

[0002] A forklift mount is a structure used to mount a forklift mast onto the front support shaft of the forklift. During manufacturing, for ease of installation, forklift mounts are typically produced in two parts: one part, called the base, is manufactured together with the forklift mast, while the other part, called the cover, is manufactured separately. During installation, the base of the forklift mount on the forklift mast is fitted with the front support shaft of the forklift. Then, the cover is threaded onto the corresponding base to form the forklift mount. During the installation of the cover and base, the front support shaft of the forklift is installed into the forklift mount.

[0003] During forklift operation, the forklift mast needs to have the ability to change its tilt angle. This means that the forklift support will rub against the corresponding support shaft during operation. To reduce wear caused by this friction on the forklift support and support shaft, and to ensure the stability of the forklift mast during rotation, the inner surface of the forklift support and the corresponding surface on the support shaft require a certain level of machining precision, generally Ra1.6. Furthermore, since the forklift support is a metal component exposed to the external environment, to prevent corrosion, the outer surface of the forklift support, i.e., the surface that does not contact the support shaft, is usually painted. The forklift support cover, as part of the forklift support, naturally also requires painting.

[0004] Because forklift support covers have machined surfaces, the existing painting process typically places the machined surface (the mating surface between the forklift support cover and the support shaft) downwards during workpiece placement. This is to prevent paint from adhering to the mating surface and affecting its surface finish through gravity. However, current painting processes usually do not take other protective measures for this mating surface. When the painting robot sprays paint on the surface adjacent to this mating surface of the forklift support cover, the angle between the sprayed paint and the horizontal plane is small, meaning the sprayed paint has a horizontal velocity. Therefore, paint can intrude into the space near the machined surface and potentially adhere to it, affecting its surface finish.

[0005] Admittedly, an easy-to-think solution is to cover the machined surface with a plastic film to avoid the aforementioned problem. However, this would require adding a step before painting the workpiece, affecting processing efficiency. Another solution is to use a jig to directly block the machined surface of the workpiece. However, considering the manufacturing cost of the jig and its limited machining accuracy, there will be a certain gap between the jig and the machined surface of the workpiece. In other words, the fit between the jig and the workpiece is not tight, which may affect the blocking effect of the jig on the machined surface of the workpiece.

[0006] To address this, a multi-station automatic painting equipment for forklift support covers is proposed, which avoids paint adhering to the finished surface of the forklift support cover during the painting process without affecting processing efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-station automatic painting equipment for forklift support covers. Through a paint blocking mechanism, the paint is prevented from adhering to the finished surface of the forklift support cover during the painting process without affecting the processing efficiency, thereby solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A multi-station automatic painting equipment for forklift support covers includes a painting robot, a material changing table, a paint blocking mechanism, and a fixing mechanism. The material changing table cooperates with the painting robot to change the workpiece that the painting robot is spraying. The material changing table is equipped with a paint blocking mechanism. The surface of the forklift support cover that needs to be painted is surface A, and the surface of the forklift support cover that does not need to be painted is surface B. The paint blocking mechanism is used to prevent paint from adhering to surface B and pushes out the fixing mechanism through gas flow, thereby stabilizing the forklift support cover.

[0010] The paint-blocking mechanism includes a support plate, a material seat, spokes, a sleeve, and an air guide rod. The support plate is fixedly connected to the upper end of the bracket, the material seat is supported by the support plate, the spokes are arranged in a ring on the side wall of the sleeve, and the negative pressure adsorption of the forklift support cover is used to achieve stability and accuracy of paint spraying during the operation of the painting robot. The air guide rod is coaxially and rotatably connected to the sleeve, and the rotation of the air guide rod releases the paint-blocking mechanism after the painting is finished.

[0011] The material holder is configured as a "bridge" shaped structure. The upper arc surface of the "bridge" shaped structure fits against the material holder during the placement of the forklift support cover, thus providing the prerequisite for the paint-blocking mechanism to adsorb the forklift support cover under negative pressure. The end of the spoke that contacts the material holder is slidably connected to a suction cup structure that can form negative pressure after the forklift support cover is placed.

[0012] The suction cup structure includes a shell; the shell is fixedly connected to the spokes, thereby providing material support during the adsorption process of the paint blocking mechanism.

[0013] The upper end of the outer shell is slidably connected to an extrusion column, and the extrusion column and the inner wall of the outer shell form a negative pressure cavity to provide negative pressure adsorption of the forklift support cover during the operation of the paint blocking mechanism.

[0014] The outer wall of the negative pressure chamber is provided with a rubber wall that deforms according to the gas pressure, thereby creating a negative pressure inside the paint barrier and stabilizing the forklift support cover during the painting process.

[0015] An air hole is provided at one end where the spokes and sleeve are connected. The air hole is connected to the inside of the air guide rod. Through the air hole on the air guide rod, the negative pressure chamber can be vented and sealed, so that the upper end of the material seat can firmly adhere to the forklift support cover during the painting process.

[0016] The material holder has multiple air chambers inside, which are connected by air channels. The air chambers evenly distribute the gas inside the multiple spokes, thereby improving the stability of the paint blocking mechanism on the forklift support cover during operation.

[0017] The upper end of the support plate is fixedly connected to a fixing mechanism, which includes a limiting block with a flexible upper end. The limiting block extends through the gas released after the forklift support cover is attached to the paint blocking mechanism, thereby achieving limiting and fixing when the forklift support cover is placed into the material seat.

[0018] The lower end of the limiting block is provided with an inclined cut, which is connected to the air passage, thereby ensuring that the gas can stably push the limiting block when the forklift support cover is placed.

[0019] Before introducing this solution, several points need to be explained in advance: First, the material changing platform used in this invention can be a belt conveyor mechanism, such as a material conveyor belt, or a rotary material changing mechanism. The material changing platform used in the following description all adopts a rotary material changing mechanism, that is, the material changing platform drives the support plate to rotate, thereby completing the loading and unloading of workpieces; Second, for the sake of convenience, the equipment of this invention described below adopts a dual-station design, that is, in the equipment of this invention described below, two supports are installed on the same material changing platform, and the painting robot sprays all the workpieces to be painted on the same support in the same painting operation; Third, the support plate can be formed by bending and folding a sheet of material, or it can be directly formed by stamping a sheet of material.

[0020] Based on this scheme, the working process of this invention is as follows: First, the worker places the forklift support cover workpiece to be painted onto the support plate. The upper surface of the support plate and the lower surface of the workpiece, i.e., the finished surface of the forklift support cover, are in close contact with each other, and the workpiece is pressed firmly onto the support plate under its own weight. Thus, the paint during the painting process cannot adhere to the finished surface of the workpiece. At this time, the material plate is pressed down by the forklift support cover. The negative pressure chamber deforms due to the soft structure of the rubber, thereby creating a negative pressure in the negative pressure chamber and forming a uniform air pressure between multiple air chambers and air channels. This allows the forklift support cover to be stably adsorbed onto the material platform. Under the push of the gas, the limiting block of the fixing mechanism rises, and then the air... The body is stabilized, and the limiting block further secures the forklift support cover. Then, the material changing table rotates, transporting the support plate containing the workpiece to the working area of ​​the painting robot. Subsequently, the painting robot starts and performs painting operations on these workpieces until all surfaces requiring painting are coated. Then, by rotating the air guide rod, the air hole overlaps with the air hole of the sleeve, thereby easing the pressure of the gas in the negative pressure chamber. Then, the forklift support cover is released from adsorption. During the painting operation of the painting robot, the painted workpieces are unloaded manually or by an industrial robot. The workpiece to be processed is then placed back on the now empty support plate to prepare for the next painting process.

[0021] In the operation of this invention, paint adhesion is avoided by the fit between the support plate and the finished surface of the workpiece. The support plate itself also serves as a component for placing the workpiece. This means that the installation of the equipment is performed simultaneously with the workpiece loading operation. When the workpiece is loaded, the equipment is also installed. Furthermore, it is simultaneously removed from the workpiece during unloading. Therefore, compared to covering the workpiece with a plastic film, the installation and removal steps of the film covering operation are eliminated, improving processing efficiency. Moreover, the support plate is reusable, saving on equipment operating costs.

[0022] Meanwhile, in this invention, the support plate can indicate the placement position of the workpiece. Since the forklift support cover is usually chamfered around its finished surface to reduce stress concentration and facilitate processing, by bending the support plate around its perimeter to create a corresponding angle, the support plate can limit the workpiece placed on it. In other words, the support plate also becomes a clamp for the workpiece, thereby ensuring the accuracy of the workpiece placement position and helping to guarantee the painting effect.

[0023] It is worth noting that the reason why accurate workpiece placement is beneficial to ensuring the processing effect of spray painting is that the program of the spray painting robot is fixed, and thus the movement trajectory of the spray painting robot is fixed. Therefore, when the workpiece is misplaced, the spray painting robot will continue to perform spray painting operations on a work trajectory that is offset relative to the workpiece, which may result in uneven spraying on the workpiece.

[0024] For this reason, it is meaningful to bend the support plate to match the workpiece at an angle. However, it is important to note that the bending portion of the support plate should not be excessive. This is because the chamfer size around the finished surface of the workpiece is limited. If the bent portion of the support plate extends beyond the chamfer when it mates with the corresponding chamfer on the workpiece, that is, if the bent portion of the support plate extends beyond the chamfer and forms a groove with the side wall of the workpiece, then paint is likely to accumulate in this groove during the painting process. When the workpiece is finished painting, the fit between the support plate and the workpiece is released. At this time, this accumulated paint may flow down the surface of the workpiece, forming paint droplets on the edge of the finished surface of the workpiece, or this accumulated paint may flow down the upper surface of the support plate to the mating surface between the support plate and the workpiece. Both of these situations mean that paint will still adhere to the finished surface of the workpiece during the painting process, which is obviously contrary to the original intention of the invention. Therefore, it is necessary to avoid excessively long bent portions on the support plate. Specifically, the bent portions on the support plate should not extend beyond the chamfer around the machined surface of the forklift support cover.

[0025] However, the extension length of the bent portion on the support plate is limited, which inevitably limits the positioning effect of the support plate on the workpiece. Therefore, during the loading and unloading process on the material changing table, the workpiece may slip off the support plate due to its own inertia. To address this, two limiting blocks that cooperate with the forklift support cover workpiece can be installed on the support plate. The limiting blocks can then cooperate with the bolt holes on the workpiece. More specifically, when the workpiece is placed on the support plate, the two limiting blocks are inserted into the two bolt holes on the workpiece, thereby enhancing the positioning effect and compensating for the shortcomings of the support plate in this aspect.

[0026] Regarding the limiting block, it's important to note that a chamfer should be added to the top edge of the limiting block to reduce the difficulty of fitting the limiting block with the bolt holes on the workpiece. Furthermore, the length of the limiting block should be less than the length of the bolt holes. This design aims to prevent uneven paint spraying on the workpiece surface. More specifically, if the length of the limiting block is greater than the length of the bolt holes, it means that when the workpiece is placed on the support plate, the limiting block has a portion extending beyond the upper surface of the workpiece. This protruding portion may obstruct the paint spraying, affecting the paint application effect. Therefore, the length of the limiting block should be less than the length of the bolt holes.

[0027] In a preferred embodiment of the present invention, a support rod is installed on the bracket, a sleeve is fitted on the support rod, a plurality of spokes are installed on the sleeve, and the support plate is connected to the plurality of spokes.

[0028] In this invention, the support plate needs to fit snugly against the machined surface of the workpiece to ensure the desired effect. However, relying solely on the fit between the support plate and the machined surface of the workpiece is clearly insufficient. A compressive force needs to be applied between the two to press the workpiece onto the support plate. In this invention, since the forklift support cover typically weighs 1 kg or more, the workpiece's own weight is sufficient to apply this force.

[0029] On the other hand, to ensure that the pressure is fully applied between the machined surface of the workpiece and the support plate, the workpiece and the support plate should only contact each other at the contact surface; that is, other parts of the workpiece should not contact the support plate. However, as a sheet metal component, the support plate has poor resistance to deformation. During the painting process, the changing table frequently moves and stops, meaning the support plate will be constantly subjected to mechanical vibration. During this process, the support plate will sway back and forth due to its own inertia and elasticity. This swaying will eventually act on the arched foot formed by the curved part of the support plate, easily causing fatigue damage to the arched foot. Therefore, support rods, sleeves, and spokes are installed.

[0030] By setting up support rods, sleeves, and spokes in a structure similar to a bicycle wheel, the support plate is supported by the spokes, limiting the deformation of the support plate. This allows the arched part of the support plate to maintain its original shape, reducing the influence of mechanical vibration and other factors on the shape of the support plate, and improving the reliability and stability of the invention.

[0031] It is worth noting that, to ensure the effectiveness of this solution, at least three spokes should be used. Two spokes provide support at the two arch feet of the arched section of the support plate, reducing deformation at the arch feet and preventing damage due to bending fatigue. The third spoke supports the crown of the arched section of the support plate, thus preventing swaying at the crown. In this way, the deformation of the support plate can be basically limited. Furthermore, the more spokes used, the better it is to maintain the shape of the support plate, that is, the better it is to prevent fatigue damage to the support plate.

[0032] It is worth adding that by using support rods, sleeves, and spokes, the mechanical performance requirements of the support plate are effectively reduced. Therefore, the support plate can sacrifice some structural strength in favor of a lighter weight, meaning it can be manufactured thinner. This implies that the support plate can be manufactured by stamping thin metal sheets, or by injection molding thin plastic sheets. Furthermore, when high precision is not required, existing thin metal sheets can be directly used, and the sheet can be molded to fit the shape of the workpiece's machined surface using a rubber mallet to create the support plate structure. In summary, the manufacturing cost, maintenance cost, and maintenance difficulty of this invention are all reduced.

[0033] Furthermore, the support rod and the sleeve are connected by a pin. This is because, based on the above-described configuration, the support plate is mounted onto the bracket by fitting the sleeve onto the support rod. Therefore, to limit the sliding of the sleeve on the support rod and prevent it from sliding due to centrifugal force during the operation of this invention, the sleeve and support rod are connected by a pin.

[0034] As a preferred embodiment of the present invention, a sponge pad is installed on the top surface of the material platform.

[0035] By setting up a sponge pad, the contact between the workpiece and the support plate is not rigid, thus protecting the machined surface of the forklift support cover workpiece and preventing tiny burrs on the support plate from scratching the machined surface of the workpiece.

[0036] Regarding all the above technical solutions, it is worth mentioning that the support plate used in the device of this invention can be replaced by a support block, achieving the same effect. In this case, the upper surface of the support block mates with the machined surface of the workpiece. Since the support block is a single unit, it has good structural stability and, compared to the support plate, will not change shape due to mechanical vibration or other factors. Therefore, spokes are no longer needed, simplifying the structure. The sleeve can be directly installed on the support block. However, the support block has a large space occupancy, resulting in significant weight. During the movement and stopping of the material changing table, the impact and vibration on the device of this invention due to inertia are substantial, placing higher demands on the mechanical properties of other components and the overall stress on the device. In contrast, the support plate has poor structural stability and is more complex due to the use of spokes. However, the support plate solution has a smaller space occupancy, resulting in a lighter material seat and less inertia. Consequently, the impact on the device due to inertia during the movement and stopping of the material seat with the material changing table is smaller, thus reducing the vibration generated by the device of this invention.

[0037] Additionally, it should be noted that the support plate, being a thin plate, is prone to deformation, which is both a disadvantage and an advantage. Specifically, the reasons for its disadvantage have been explained above and will not be repeated here. However, its advantage lies in the fact that when the workpiece is placed on the support plate, even if there is a gap between the support plate and the machined surface of the workpiece, the support plate can still deform under the action of the workpiece's own weight to ultimately achieve a proper fit with the machined surface of the workpiece.

[0038] Correspondingly, due to its strong overall integrity and high structural resistance to deformation, the support block cannot achieve complete fit with the machined surface of the workpiece using this method. It relies on the manufacturing precision of the support block itself and the compensating effect of other components in the device to achieve complete fit. For example, using the sponge pad mentioned in the aforementioned preferred embodiment, a thicker sponge pad can fill the gap between the upper surface of the support block and the machined surface of the workpiece. For this reason, for the material holder using the support block solution, multiple magnets can be installed on the support block. These magnets tightly attract the forklift support cover workpiece to the support block. Thus, based on the previous technical solution, it can be ensured that the sponge pad is pressed tightly between the machined surface of the workpiece and the upper surface of the support block, which means that the sponge pad's filling effect on the gap between the workpiece and the support block is guaranteed. In addition, the magnets can further ensure that the position of the workpiece does not change during the operation of the device. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a schematic diagram illustrating the cooperation relationship between the support and the material holder in this invention;

[0041] Figure 3 This is an internal schematic diagram showing the fit between the support frame and the material holder;

[0042] Figure 4 This is a schematic diagram of the interior of the material holder;

[0043] Figure 5 This is a schematic diagram of the air cavity;

[0044] Figure 6 This is a schematic diagram of the air guide rod;

[0045] Figure 7 This is a schematic diagram of the paint-blocking mechanism.

[0046] In the diagram: 1. Painting robot; 2. Material changing table; 3. Support frame; 4. Paint blocking mechanism; 41. Support plate; 42. Material seat; 421. Air chamber; 422. Air passage; 43. Spoke; 44. Sleeve; 45. Air guide rod; 451. Air hole; 46. Suction cup structure; 461. Outer shell; 462. Extrusion column; 463. Negative pressure chamber; 464. Rubber wall; 5. Fixing mechanism; 51. Limiting block; 52. Inclined cut. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0048] like Figures 1 to 4 as well as Figure 7 The image illustrates a first specific embodiment of the present invention. In this embodiment, a support plate 41 is selected as the material holder 42, and the support plate 41 is made of 0.2mm aluminum alloy plate.

[0049] A multi-station automatic painting equipment for forklift support covers includes a painting robot 1, a material changing table 2, a paint blocking mechanism 4, and a fixing mechanism 5. The material changing table 2 cooperates with the painting robot 1 to change the workpiece that the painting robot 1 is spraying. The material changing table 2 is equipped with a paint blocking mechanism 4. The surface of the forklift support cover that needs to be painted is surface A, and the surface of the forklift support cover that does not need to be painted is surface B. The paint blocking mechanism 4 is used to prevent paint from adhering to surface B, and the fixing mechanism 5 is pushed out by the gas flow, thereby stabilizing the forklift support cover.

[0050] like Figure 3 and Figure 4As shown, the paint blocking mechanism 4 includes a support plate 41, a material seat 42, spokes 43, a sleeve 44, and an air guide rod 45. The support plate 41 is fixedly connected to the upper end of the bracket 3. The material seat 42 is supported by the support plate 41. The spokes 43 are arranged in a ring on the side wall of the sleeve 44 and are used to adsorb the forklift support cover through negative pressure, thereby achieving stability and accuracy of paint spraying during the operation of the painting robot 1. The air guide rod 45 is coaxially and rotatably connected to the sleeve 44, and the rotation of the air guide rod 45 releases the paint blocking mechanism 4 after the painting is finished.

[0051] As preparations for the installation of this invention, several points need to be explained. First, the equipment of this invention is based on the modification of existing painting equipment. Therefore, the painting robot 1 and the material changing table 2 are pre-installed in the painting booth. The material changing table 2 is a rotary type and has two workstations. In addition, the painting equipment has a matching robot to automatically load and unload workpieces. More specifically, the method of the matching robot to grip the workpiece is to insert the gripper into the two through holes on the forklift support cover and then tighten the gripper to grip the workpiece. Second, five mounting seats for mounting spokes 43 are pre-manufactured on the sleeve 44. Correspondingly, five threaded short rods are pre-fixed on the support plate 41 by adhesive bonding. One end of the spoke 43 is welded with a rod that interacts with the threaded short rod. The fit is as follows: 1. The nut is fitted to the spoke 43; 2. The end of the spoke 43 without the nut is fitted to the corresponding mounting seat on the sleeve 44 with an interference fit; 3. For a single support plate 41, two limiting blocks 51 are pre-attached to the support plate 41 by adhesive bonding; 4. The support rod is a hollow rod with multiple through holes for installing pins, and correspondingly, each sleeve 44 also has through holes for installing pins; 5. The support rod is installed by a support pre-installed on the bracket 3, and to prevent the support rod from sliding along its own axial direction, two end caps are welded to the bracket 3 at the corresponding support of the support rod; 6. The arched part of the support plate 41 has an upwardly bent portion to match the chamfer around the finished surface of the forklift support cover workpiece.

[0052] like Figure 1As shown, when installing this invention, two brackets 3 are symmetrically installed on the top of the material changing platform 2 by welding. Then, a sleeve 44, a support plate 41, and five spokes 43 are taken out. For one of the two brackets 3, the ends of the five spokes 43 with welded nuts are screwed into the corresponding threaded short rods on the support plate 41. Then, the ends of the five spokes 43 without welded nuts are inserted into the five mounting seats on the sleeve 44. This completes the connection between the support plate 41 and the sleeve 44. Subsequently, a 1.5mm thick sponge pad is fixed to the upper surface of the arched part of the support plate 41 by adhesive bonding to obtain an assembly. Another assembly is assembled in the same way, that is, a total of two assemblies are assembled.

[0053] Then, take out an assembled component, put the sleeve 44 on it onto the support rod, and connect the sleeve 44 to the support rod with a pin. Thus, the sleeve 44 cannot slide along the support rod. The other component is installed onto the support rod in the same way. Finally, place the support rod on the corresponding support on the bracket 3. At this point, all structures on a single bracket 3 are installed.

[0054] Subsequently, another bracket 3 is installed using the above installation method to finally obtain the device of the present invention.

[0055] When the present invention is in operation, two forklift support cover workpieces are placed on two support plates 41 respectively. At this time, two limiting blocks 51 on the support plate 41 are inserted into two mounting holes on the workpiece for mounting bolts, and the top of the limiting block 51 is still located in the mounting hole. The support plate 41 is in contact with the finished surface of the workpiece, and the sponge pad is deformed by pressure. At the same time, the upward bending part of the arched part of the support plate 41 is in contact with the chamfer around the finished surface of the workpiece. In addition, the two ends of the support plate 41 abut against the bracket 3. With the help of the support rod and pins, the support plate 41 is well fixed. Therefore, the workpiece has a good positioning effect, that is, the workpiece has a definite position. Then, the material changing table 2 is started, and the material changing table 2 is rotated 18. The workpiece is rotated and moved to the working area of ​​the painting robot 1. Then, the painting robot 1 sprays paint on the workpiece in its working area. At the same time, the loading robot places two other workpieces to be painted onto two support plates 41 on another bracket 3. After the painting robot 1 completes a painting process, the material changing table 2 is started. The material changing table 2 rotates 180°, which is equivalent to exchanging the positions of the two workpieces that have been painted with the two workpieces to be painted. Then, the workpieces to be painted enter the working area of ​​the painting robot 1 to continue processing, while the workpieces that have been painted are automatically unloaded by the matching robot. This completes a work process.

[0056] The material seat 42 is configured as a "bridge" shaped plate, which allows the bottom surface of the forklift support cover to fit against the material seat 42 after the forklift support cover is placed.

[0057] The spoke 43 is slidably connected to a suction cup structure 46 that can form a negative pressure after the forklift support cover is placed. The suction cup structure 46 includes a housing 461. The housing 461 is fixedly connected to the spoke 43, thereby providing support for the material seat 42 during the adsorption process of the paint blocking mechanism 4.

[0058] The upper end of the outer shell 461 is slidably connected to an extrusion column 462, and the extrusion column 462 and the inner wall of the outer shell 461 form a negative pressure cavity 463 for providing negative pressure adsorption of the forklift support cover during the operation of the paint blocking mechanism 4.

[0059] The outer wall of the negative pressure chamber 463 is provided with a rubber wall 464 that deforms according to the gas pressure, thereby creating a negative pressure inside the paint barrier and stabilizing the forklift support cover during the painting process.

[0060] like Figure 6 As shown, an air hole 451 is provided at one end where the spoke 43 and the sleeve 44 are connected. The air hole 451 is connected to the inside of the air guide rod 45. Through the air hole 451 provided on the air guide rod 45, the negative pressure chamber 463 can be depressurized and sealed, so that the upper end of the material seat 42 can tightly adhere to the forklift support cover when the painting work is carried out.

[0061] like Figure 5 As shown, the material seat 42 has multiple air chambers 421 inside, which are connected by air channels 422. The air chambers 421 are used to evenly distribute the gas inside the multiple spokes 43, thereby improving the stability of the paint blocking mechanism 4 on the forklift support cover during operation.

[0062] The upper end of the support plate 41 is fixedly connected to a fixing mechanism 5. The fixing mechanism 5 includes a limiting block 51 with a flexible material at the upper end. The limiting block 51 extends through the gas released after the forklift support cover is attached to the paint blocking mechanism 4, thereby achieving limiting and fixing when the forklift support cover is placed into the material seat 42.

[0063] The lower end of the limiting block 51 is provided with an inclined cut 52, which is connected to the air passage 422, thereby ensuring that the gas can stably push the limiting block 51 when the forklift support cover is placed.

[0064] During the operation of the equipment of the present invention, the support plate 41 is structurally stable and does not deform. After the forklift support cover workpiece is sprayed, there is no paint adhering on its finely machined surface, and the remaining sprayed parts have a uniform and glossy paint layer.

[0065] In this embodiment, to reduce the weight of the support block and thus minimize the impact and vibration experienced by the equipment during use, the support block is made of plastic. The support block and sleeve 44 are connected by adhesive bonding. Multiple grooves for mounting magnets are pre-fabricated on the support block, and multiple magnets are installed in these grooves using interference fits. Regarding the selection of the sponge pad, considering its role in filling the gap between the machined surface of the workpiece and the upper surface of the support block, the thickness of the sponge pad is chosen to be 2.5 mm.

[0066] During operation, the support block, as a single structural component, provides structural stability. Furthermore, under the magnetic force of multiple magnets and the weight of the workpiece itself, the sponge pad is compressed to a thickness of 1mm, completely filling the gap between the machined surface of the workpiece and the upper surface of the support block. After the forklift support cover workpiece undergoes spraying, no paint adheres to the machined surface, and the remaining sprayed areas exhibit a uniform and glossy paint layer.

[0067] The working process of this invention is as follows: First, the worker places the forklift support cover workpiece to be painted onto the support plate 41. The upper surface of the support plate 41 and the lower surface of the workpiece, i.e., the finished surface of the forklift support cover, are in close contact with each other, and the workpiece is pressed firmly onto the support plate 41 under its own weight. Thus, the paint during the painting process cannot adhere to the finished surface of the workpiece. At this time, the material plate is pressed down by the forklift support cover. The negative pressure chamber 463 deforms due to the soft structure of the rubber, thereby creating a negative pressure in the negative pressure chamber 463. A uniform air pressure is formed between the multiple air chambers 421 and the air passages 422, which in turn causes the forklift support cover to be stably adsorbed onto the material platform. Under the push of the gas, the limiting block 51 of the fixing mechanism 5 rises, and then the gas is stabilized. The limiting block 51 further secures the forklift support cover; then, the changing table 2 rotates, rotating and transporting the support plate 41 containing the workpiece to the working area of ​​the painting robot 1. Subsequently, the painting robot 1 starts and performs painting operations on these workpieces until all surfaces that need to be painted are painted. Then, by rotating the air guide rod 45, the air hole 451 overlaps with the air hole 451 of the sleeve 44, thereby allowing the gas in the negative pressure chamber 463 to be depressurized. Then, the forklift support cover is released from adsorption. During the painting operation of the painting robot 1, the painted workpieces are unloaded by manual labor or industrial robots, and the workpieces to be processed are placed back on the now empty support plate 41 to prepare for the next painting process.

[0068] Even though the present invention has been described with reference to specific exemplary embodiments, many different alternatives and modifications will become apparent to those skilled in the art. It should also be noted that the circuit layout and identification / detection methods within the device of the present invention can be omitted, and can be interchanged or arranged in various ways, while the structure of the device still enables it to perform the functionality of the present invention.

Claims

1. A multi-station automatic painting equipment for forklift support covers, comprising: A painting robot (1) and a changing table (2); the changing table (2) cooperates with the painting robot (1) to change the workpiece that is the object to be painted by the painting robot (1); characterized in that: it also includes a paint blocking mechanism (4) and a fixing mechanism (5). The changing table (2) is provided with a paint blocking mechanism (4). The surface on the outside of the forklift support cover that needs to be painted is surface A, and the surface on the forklift support cover that does not need to be painted is surface B. The paint blocking mechanism (4) prevents the paint from adhering to surface B by adsorbing the forklift support cover by negative pressure, and pushes out the fixing mechanism (5) by the gas flow during the negative pressure generation process, thereby stabilizing the forklift support cover; The paint blocking mechanism (4) includes a support plate (41), a material seat (42), spokes (43), a sleeve (44), and an air guide rod (45). The support plate (41) is fixedly connected to the upper end of the bracket (3). The material seat (42) is supported by the support plate (41). The spokes (43) are arranged in a ring on the side wall of the sleeve (44). The air guide rod (45) is coaxially and rotates with the sleeve (44). The rotation of the air guide rod (45) opens and closes the air hole (451), thereby releasing the negative pressure state of the paint blocking mechanism (4) after the painting is finished. The material seat (42) is configured as a "bridge" shaped structure. The upper arc surface of the "bridge" shaped structure is in contact with the material seat (42) during the placement of the bottom surface of the structural forklift support cover, thereby providing the prerequisite for the negative pressure adsorption of the paint blocking mechanism (4) on the forklift support cover. The spoke (43) is slidably connected to a suction cup structure (46) that can form a negative pressure after the forklift support cover is placed. Thus, a negative pressure cavity is formed by gravity after the forklift support cover is placed. The suction cup structure (46) includes a shell (461). The shell (461) is fixedly connected to the spoke (43), so that the spoke (43) can provide support for the material seat (42) during the adsorption process of the paint blocking mechanism (4). The upper end of the outer shell (461) is slidably connected to an extrusion column (462), and the extrusion column (462) and the inner wall of the outer shell (461) form a negative pressure cavity (463) for providing negative pressure adsorption of the forklift support cover during the operation of the paint blocking mechanism (4), so that the forklift support cover can be stably adsorbed by negative pressure and achieve the paint blocking effect during the painting process.

2. The multi-station automatic painting equipment for forklift support covers according to claim 1, characterized in that: The outer wall of the negative pressure chamber (463) is provided with a rubber wall (464) that deforms according to the gas pressure, thereby creating a negative pressure inside the paint barrier and adsorbing and stabilizing the forklift support cover during the painting process.

3. The multi-station automatic painting equipment for forklift support covers according to claim 2, characterized in that: A vent (451) is provided at one end where the spoke (43) and sleeve (44) are connected. The vent (451) is connected to the inside of the air guide rod (45). Through the vent (451) provided on the air guide rod (45), the negative pressure chamber (463) can be vented and sealed, so that the upper end of the material seat (42) can tightly adhere to the forklift support cover when painting is being carried out.

4. The multi-station automatic painting equipment for forklift support covers according to claim 1, characterized in that: The material seat (42) is provided with multiple air chambers (421) inside. The multiple air chambers (421) are connected by air channels (422). The air chambers (421) are used to evenly distribute the gas inside the multiple spokes (43), thereby improving the stability of the paint blocking mechanism (4) on the forklift support cover during operation.

5. The multi-station automatic painting equipment for forklift support covers according to claim 1, characterized in that: The upper end of the support plate (41) is fixedly connected to a fixing mechanism (5). The fixing mechanism (5) includes a limiting block (51) and an inclined cut (52). The limiting block (51) extends through the gas released after the forklift support cover is attached to the paint blocking mechanism (4), thereby achieving limiting and fixing when the forklift support cover is placed into the material seat (42).

6. The multi-station automatic painting equipment for forklift support covers according to claim 5, characterized in that: The lower end of the limiting block (51) is provided with an inclined cut (52), and the air passage (422) leads to the inclined cut (52) to ensure that the gas can stably push the limiting block (51) when the forklift support cover is placed.

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