Commercial vehicle cab underbody coating spraying hoist and overhead skid conveying system

Abstract

The present application relates to commercial vehicle painting technology field, disclose commercial vehicle cab bottom paint spraying spreader and overhead skid conveying system, including skid transmission support device, cab support hoist arm frame and full vehicle type cab bottom support arm group; two cab support hoist arm frames are respectively left-right symmetrical fixed on the Y direction left and right side walls of skid transmission support device; two groups of full vehicle type cab bottom support arm groups are respectively left-right symmetrical horizontal fixed on the lower inner side wall of two cab support hoist arm frames, and each group of full vehicle type cab bottom support arm group is arranged on the X direction front, middle and rear of the cab support hoist arm frame in position; overhead skid conveying system, including roller bed with roller, vertical lifting mechanism and Y direction translation mechanism, also including commercial vehicle cab bottom paint spraying spreader; the structure of the present application can meet the hoisting requirement of all long and short commercial vehicle models cab when painting on the bottom, and can work with inverted skid together.

Description

Technical Field

[0001] This invention relates to the field of commercial vehicle coating technology, and more particularly to a lifting device and overhead skid conveying system for spraying paint onto the undercarriage of commercial vehicles. Background Technology

[0002] In recent years, with the continuous upgrading and changes of commercial vehicle models, the number of models put into the same production line has also increased. This makes it difficult for the original lifting equipment to meet the lifting needs of the cabs of many commercial vehicle models. If different lifting equipment is made according to different models, firstly, it will increase the cost of equipment design, procurement, installation, commissioning and maintenance; secondly, changing different lifting equipment according to different models during the production process will reduce the production cycle of the workshop; and thirdly, there is no space on site to store lifting equipment.

[0003] Therefore, there is an urgent need to develop a universal lifting tool for commercial vehicle cabs to meet the needs of undercarriage paint spraying and lifting for various commercial vehicle models. Summary of the Invention

[0004] To solve the above problems, the present invention provides a lifting device and an overhead skid conveying system for spraying paint on the undercarriage of commercial vehicles. This structure can meet the lifting requirements of all types of commercial vehicles, both long and short, for spraying paint on the undercarriage, and can also work in conjunction with PVC inverted skids.

[0005] This invention proposes a lifting device for spraying paint on the underside of a commercial vehicle cab, including a skid transmission support device, a cab support boom frame, and a cab underside support bracket assembly for all vehicle models.

[0006] Two cab support boom frames are symmetrically fixed to the left and right side walls of the skid drive support device in the Y direction (Y direction is the length direction of the air roller, X direction is the width direction of the air roller, and Z direction is the height direction of the air roller). The skid drive support device is rolledly connected to the upper surface of the vertically lifting roller. When the vertically lifting roller rises to the same plane as the fixed position roller in the air, the left and right sets of X-direction rollers of the vertically lifting roller and the fixed position roller rotate synchronously in the same direction. The skid drive support device can be transferred from the vertically lifting roller to the fixed position roller and continue to be transferred forward to the painting station to stop.

[0007] Two sets of full-model cab under-floor support brackets are symmetrically fixed horizontally to the lower inner walls of the two cab support boom frames. Each set of full-model cab under-floor support brackets is positioned at the front-middle-rear part of the aligned cab support boom frame. The cab support boom frame and the full-model cab under-floor support brackets, which are fixedly connected to the skid transmission support device, can lift a commercial vehicle cab of a certain model in the X and Y directions and move it forward to the painting station. The full-model cab under-floor support brackets can lift one side of the cab under-floor in the X direction at two or three points for both long and short commercial vehicle models. They can also be positioned in the Y direction for different widths of the long and short commercial vehicle cabs to prevent inertial displacement of the cab in the X or Y directions during the lifting process and avoid overturning and falling damage caused by improper cab positioning during the lifting process.

[0008] Each set of the all-model cab under-cabin support brackets includes a cab door lower skirt bracket, a cab side panel middle lower end bracket, and a cab side panel rear lower end bracket. The cab door lower skirt bracket is horizontally and vertically mounted on the inner side wall of the lower front portion of the corresponding cab support boom frame. The cab side panel middle lower end bracket is horizontally fixed to the rear middle portion of the lower end face of the corresponding cab support boom frame. The cab side panel rear lower end bracket is horizontally and vertically mounted on the inner side wall of the lower rear portion of the corresponding cab support boom frame. The cab door lower skirt bracket can correspondingly contact the lower skirt on one side of the cab of all commercial vehicle models, and the cab side panel middle lower end bracket can correspondingly contact one side of the cab of all commercial vehicle models. The lower middle section of the side panel, the lower side skirt support arm of the cab door, and the lower middle section of the cab side panel can all be used to lift the cab of short commercial vehicles. The four points of support provided by the lower side skirt support arm of the cab door on both sides of the spreader and the lower middle section of the cab side panel can ensure that the cab of short commercial vehicles is lifted stably with its center of gravity suspended in the air. The lower rear section of the cab side panel can be connected to the lower rear section of the side panel on one side of the cab of long commercial vehicles. The six points of support provided by the lower side skirt support arm of the cab door on both sides of the spreader, the lower middle section of the cab side panel, and the lower rear section of the cab side panel can ensure that the cab of long commercial vehicles is lifted stably with its center of gravity suspended in the air.

[0009] The vertical height of the upper surface of the lower end support arm in the middle of the cab side panel of each group of all-model cab under-floor support arm assemblies is higher than the vertical height of the upper surface of the lower end support arm of the cab door skirt. Furthermore, the vertical height of the upper surface of the upper end support arm in the rear of the cab side panel of each group of all-model cab under-floor support arm assemblies is lower than the vertical height of the upper surface of the lower end support arm in the middle of the cab side panel but higher than the vertical height of the upper surface of the lower end support arm of the cab door skirt. The lower end of all commercial vehicle cabs is not flat; the lower end of the middle of the cab side panel is a concave arc curve. The vertical position of the lower end support arm in the middle of the cab side panel is set higher than the vertical position of the lower end support arm of the cab door skirt. The lower end support arms in the middle of the cab side panel and the lower end support arms of the cab door skirt restrict the X-direction displacement of the cab in the X-direction. Simultaneously, the lower end support arms in the middle of the cab side panel and the lower end support arms of the cab door skirt restrict the X-direction displacement of the cab in the X-direction. The lower support arm in the middle of the cab and the lower skirt support arm of the cab door stabilize the cab's center of gravity in the Z-direction, preventing the cab from tipping over. The horizontal distance between the inner end of the lower skirt support arm of the cab door and the vertical plane of the cab support boom frame in each group of cab floor support support arms for all models is greater than the horizontal distance between the inner end of the lower support arm in the middle of the cab side wall and the vertical plane of the cab support boom frame. Furthermore, the horizontal distance between the inner end of the lower support arm in the middle of the cab side wall and the vertical plane of the cab support boom frame is greater than the horizontal distance between the inner end of the lower support arm at the rear of the cab side wall and the vertical plane of the cab support boom frame. The difference in horizontal distances among these three types is designed to correspond to the width of the cab in the Y-direction for all models of commercial vehicles. The pads set on the support arms restrict the displacement of the cab in the Y-direction for all models of cabs, preventing the cab from tipping over to the left or right.

[0010] The vertical height difference h1 between the upper end face of the lower end support arm in the middle of the cab side wall and the upper end face of the lower skirt support arm of the cab door is 175mm-185mm, and the vertical height difference h2 between the upper end face of the lower end support arm in the middle of the cab side wall and the upper end face of the lower end support arm at the rear of the cab side wall is 105mm-115mm.

[0011] The cab door lower skirt support arm and the cab side lower rear support arm of each group of cab under-floor support arms for all vehicle models have the same structure. The cab door lower skirt support arm includes a rectangular tube, a boom frame connecting plate, a cab under-floor support reinforcing plate, a boom frame connecting plate reinforcing rib, a support block plate, and a rubber support block. The boom frame connecting plate is vertically arranged, and one end of the horizontally arranged rectangular tube is welded and fixed to the lower part of the inner side wall of the boom frame connecting plate. The cab under-floor support reinforcing plate is welded and fixed to the upper end face of the other end of the rectangular tube. The boom frame connecting plate reinforcing rib is vertically welded and fixed to the two end faces of the rectangular tube and the boom frame connecting plate at the fixed position. The boom frame connecting plate is screwed onto the inner side wall of the lower front part of the cab support boom frame. The rubber support block is screwed and fixed to the middle of the upper surface of the support block plate. The support block plate is matched and screwed and fixed to the cab under-floor support reinforcing plate by bolts. Each set of the full-model cab under-cabin support bracket assembly includes a square tube, a central connecting plate of the boom frame, a central support reinforcement plate of the cab under-cabin, a pair of reinforcing ribs of the central connecting plate of the boom frame, a central support block plate, and a central rubber support block. The reinforcing ribs of the central connecting plate of the boom frame are symmetrically fixed to the front and rear end faces of the outer end of the square tube horizontally arranged in the Y direction. The central connecting plate of the boom frame is horizontally arranged, and its lower end face is fixed to the upper end of the reinforcing ribs of the central connecting plate of the boom frame. The lower end face of the central support reinforcement plate of the cab under-cabin is welded and fixed to the upper end face of the inner end of the square tube. The central connecting plate of the boom frame is horizontally fixed to the middle and rear part of the lower end face of the aligned cab support boom frame. The central rubber support block is screwed and fixed to the middle part of the upper end face of the central support block plate. The central support block plate is bolted and screwed to the central support reinforcement plate of the cab under-cabin.

[0012] The rubber support block of the lower side skirt support arm of the cab door has two inverted trapezoidal grooves in the X-direction along its length. The inner inverted trapezoidal groove can contact the lower side skirt limiter of the short commercial vehicle cab door on the same side, limiting the Y-direction displacement of the short commercial vehicle cab at that position. The outer inverted trapezoidal groove can contact the lower side skirt limiter of the long commercial vehicle cab door on the same side, limiting the Y-direction displacement of the long commercial vehicle cab at that position. The rubber support block of the lower rear support arm of the cab side panel has an inverted trapezoidal groove in the X-direction along its length at the middle of its upper surface. This inverted trapezoidal groove can... The side panel of the long commercial vehicle cab on the same side can contact the lower rear limit of the side panel, thus limiting the Y-direction displacement of the long commercial vehicle cab at that position. The upper end of the middle rubber support block of the lower support arm in the middle of the cab side panel has two inverted trapezoidal grooves in the X-direction of the side panel along its length. The inner inverted trapezoidal groove in the X-direction of the side panel can contact the lower rear limit of the side panel of the short commercial vehicle cab on the same side, thus limiting the Y-direction displacement of the short commercial vehicle cab at that position. The outer inverted trapezoidal groove in the X-direction of the side panel can contact the lower rear limit of the side panel of the long commercial vehicle cab on the same side, thus limiting the Y-direction displacement of the long commercial vehicle cab at that position.

[0013] Each of the aforementioned cab-supporting boom frames includes a front boom, a rear boom, an upper horizontal connecting rod, and a lower horizontal connecting rod. The front boom and rear boom are arranged in parallel front to rear. The horizontal short arms of the front boom and the horizontal short arms of the rear boom are correspondingly fixed to the same side end face of the skid transmission support device. The two ends of the upper horizontal connecting rod and the two ends of the lower horizontal connecting rod are respectively fixed to the upper and lower parts of the opposite side walls of the vertical long arms of the front boom and the vertical long arms of the rear boom. The boom frame connecting plate is fixed to the lower end of the inner side wall of the vertical long arm of the front boom. The middle connecting plate of the boom frame is horizontally fixed to the middle and rear part of the lower end face of the lower horizontal connecting rod. The outer end of the lower rear support arm of the cab side wall is fixed to the lower end of the inner side wall of the vertical long arm of the rear boom. The front boom and the rear boom have the same structure. The front boom includes an L-shaped support square tube, a side end connecting plate of the skid transmission support device, a first reinforcing plate, a second reinforcing plate, a third reinforcing plate, and a fourth reinforcing plate. The lower part of the outer side of the side end connecting plate of the skid transmission support device is horizontally aligned with the L-shaped support square tube. The short boom end is fixedly connected, and the inner side of the side connecting plate of the skid transmission support device is fixedly connected to the outer side of the aligned skid transmission support device. The first reinforcing plate is vertically set and welded and fixed to the two end faces of the side connecting plate of the skid transmission support device and the L-shaped support square tube connection position respectively. The second reinforcing plate is fixed to the upper part of the aligned side wall of the vertical long arm of the L-shaped support square tube corresponding to the position of the upper horizontal connecting rod. The third reinforcing plate is fixed to the lower part of the aligned side wall of the vertical long arm of the L-shaped support square tube corresponding to the lower horizontal connecting rod. The fourth reinforcing plate is fixed to the inner side wall of the lower end of the vertical long arm of the L-shaped support square tube. The fourth reinforcing plate is matched and screwed to the boom frame connecting plate. The lower horizontal connecting rod includes a square tube body, a front boom connecting plate, a rear boom connecting plate and a horizontal reinforcing plate. The front boom connecting plate and the rear boom connecting plate are fixed to the front and rear end faces of the square tube body in the length direction respectively. The horizontal reinforcing plate is fixed to the middle and rear part of the lower end face of the square tube body. The middle connecting plate of the boom frame is matched and screwed to the horizontal reinforcing plate.

[0014] The skid transmission support device includes a pair of rolling connecting rods for the bed rollers, six right-angle support arms, a horizontal support frame for the H-shaped lifting device, and four support device reinforcing plates. The six right-angle support arms are symmetrically divided into two groups. The ends of the three right-angle support arms in each group are evenly fixed to the upper end face of one rolling connecting rod for the bed rollers along its length. The lower ends of the vertical arms of the three right-angle support arms in each group are respectively vertically fixed to the upper end face of the intersection of the three Y-direction horizontal arms and the two X-direction horizontal arms of the horizontal support frame for the H-shaped lifting device. The two support device reinforcing plates are respectively fixed to the lower ends of the outer walls of the front and rear right-angle support arms on the same side. The two support device reinforcing plates on the same side are aligned with the horizontal short arms of the front and rear lifting arms. The end screws are fixed. The design of the six right-angle support arms in the left and right groups is to avoid the side end of the vertically lifting roller bed, so that the lower end face of the roller bed roller connecting rod can match the two sets of roller groups set on the left and right sides of the upper end face of the roller bed. The setting of the connection structure of the six right-angle support arms and the horizontal support frame of the H-shaped spreader allows the two cab support boom frames connected to it to be vertically lifted and suspended and moved back and forth at their lower ends. The four support device reinforcing plates contact and are screwed to the side end connecting plates of the skid transmission support devices of the two front booms and the two rear booms to enhance the connection strength between the front booms and the rear booms and the side ends of the skid transmission support devices.

[0015] Each of the right-angle support arms has a fixedly connected intersecting end support reinforcing rib at its right-angle inner end, the lower end of the vertical arm of the right-angle support arm where it intersects with the three Y-direction horizontal arms of the horizontal support frame of the H-shaped lifting device, and the lower end of the vertical arm of the right-angle support arm where it intersects with the two X-direction horizontal arms of the horizontal support frame of the H-shaped lifting device, in order to enhance the bending strength between the tubes at each right-angle intersection of the skid transmission support device.

[0016] The overhead skid conveyor system includes a roller bed with wheels, a vertical lifting mechanism, and a Y-axis translation mechanism installed above the factory building. It also includes at least one lifting device for spraying paint onto the undercarriage of a commercial vehicle. The roller bed consists of two rows of fixed-position X-axis translation roller beds suspended from the factory building via a steel structure, two Z-axis lifting roller beds, and two Y-axis translation roller beds. Two vertical lifting mechanisms are fixed to the ground at the X-forward and rear-end positions of the right-hand row of fixed-position X-axis translation roller beds. The two Z-axis lifting roller beds are respectively aligned and connected to the two vertical lifting mechanisms. The vertical lifting mechanisms can raise the Z-axis lifting roller beds to the same horizontal plane as the right-hand row of fixed-position X-axis translation roller beds. The two Y-axis translation mechanisms... The equipment is hoisted onto the factory roof at the front and rear ends of two vertical lifting mechanisms. Two Y-axis translation rollers are respectively aligned and connected below the two Y-axis translation mechanisms. Each Y-axis translation roller is on the same horizontal plane as two fixed X-axis translation rollers before and after Y-axis translation. The upper end of each of the lifting devices for spraying paint on the underside of the commercial vehicle cab has a pair of roller connecting rods that can slidably contact the roller groups on the upper surfaces of the two fixed X-axis translation rollers, the roller groups on the upper surfaces of the two Z-axis lifting rollers, and the roller groups on the upper surfaces of the two Y-axis translation rollers. First, the vertical lifting mechanism at the rear of the X-axis drives the aligned Z-axis lifting rollers to lower one of the lifting devices for spraying paint on the underside of the commercial vehicle cab to near the ground. The cab with the primer coating is transferred from the ground roller bed to directly below the vertical lifting mechanism at the X-axis rear end. This vertical lifting mechanism drives the Z-axis lifting roller bed, which is connected to the alignment, to continuously rise along a lifting device for spraying the coating on the underside of the commercial vehicle cab. Two sets of the full-model cab underside support arms, corresponding to the long and short cabs respectively, contact and support the cab at the corresponding positions on the lower end, causing the cab to move smoothly vertically upwards until the Z-axis lifting roller bed and a row of fixed-position X-axis translating roller beds on the same side are at the same horizontal plane and stop rising. At this point, the roller groups of the Z-axis lifting roller bed and the roller groups of the fixed-position X-axis translating roller beds on the same side begin to rotate synchronously under control. The upper end of the lifting device for spraying the coating on the underside of the commercial vehicle cab is subjected to the rolling friction of the roller groups. The Z-axis lifting roller bed is completely moved to a fixed position on the X-axis translation roller bed until the lifting device for spraying paint on the underside of the commercial vehicle cab is transferred to the spraying area. All roller assemblies stop rotating. After the underside paint spraying is completed, the roller assemblies of the fixed-position X-axis translation roller bed on the right side and the roller assemblies of the Z-axis lifting roller bed at the same horizontal plane at its front rotate synchronously, moving the painted cab to the position of the front vertical lifting mechanism. All roller assemblies stop rotating, and the front vertical lifting mechanism drives the aligned Z-axis lifting roller bed, in conjunction with the lifting device for spraying paint on the underside of the commercial vehicle cab, to descend to near the ground. The painted commercial vehicle cab is then placed on the aligned ground transfer roller bed below and transported away. Then…The front vertical lifting mechanism drives the Z-axis lifting roller bed, which is connected to the alignment, to reset the unloaded lifting device for spraying paint on the underside of the commercial vehicle cab. The roller group of the front Z-axis lifting roller bed rotates synchronously with the roller group of the Y-axis translation roller bed that is connected to the front horizontal surface, completely translating the unloaded lifting device for spraying paint on the underside of the commercial vehicle cab onto the front Y-axis translation roller bed. All roller groups stop rotating. The front Y-axis translation mechanism drives the Y-axis translation, translating the unloaded lifting device for spraying paint on the underside of the commercial vehicle cab onto the front of the left-hand fixed-position X-axis translation roller bed. At the same time, the rear Y-axis translation mechanism drives the rear Y-axis translation roller bed to perform a Y-axis translation to the rear of the left-hand fixed-position X-axis translation roller bed. The front Z-axis lifting roller bed... The roller assembly of the bed, the roller assembly of the fixed-position X-axis translation roller on the left, and the roller assembly of the rear Y-axis translation roller rotate in opposite directions, completely transferring the unloaded commercial vehicle cab underside paint spraying splice onto the rear Y-axis translation roller. All roller assemblies stop rotating in opposite directions, and the rear Y-axis translation mechanism drives the rear Y-axis translation roller to reset, moving the unloaded commercial vehicle cab underside paint spraying splice to the initial position of the rear Y-axis translation mechanism, completing one commercial vehicle cab underside paint spraying operation. Alternatively, two to four commercial vehicle cab underside paint spraying splices can be slidably connected to the overhead skid conveyor system to significantly shorten the waiting time for unloaded splices and improve the efficiency of commercial vehicle cab underside paint spraying operations.

[0017] Beneficial effects

[0018] This invention can meet the lifting requirements of the cab of all commercial vehicle models, both long and short, when applying paint to the undercarriage, and can also work in conjunction with PVC inverted skids. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the lifting device of the present invention.

[0020] Figure 2 This is a side view of the lifting device of the present invention.

[0021] Figure 3 This is a front view schematic diagram of the lifting device of the present invention.

[0022] Figure 4 This is a top view schematic diagram of the lifting device of the present invention.

[0023] Figure 5 This is a front view structural schematic diagram of the skid transmission support device of the present invention.

[0024] Figure 6 This is a top view of the horizontal connecting rod structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the overall structure of the front boom of the present invention.

[0026] Figure 8 This is a schematic diagram of a partial structure of the lower skirt support arm of the driver's cab door in this invention. Figure 1 .

[0027] Figure 9 This is a schematic diagram of a partial structure of the lower end support arm in the middle of the driver's cab side panel of the present invention. Figure 1 .

[0028] Figure 10 This is a schematic diagram of a partial structure of the lower skirt support arm of the driver's cab door in this invention. Figure 2 .

[0029] Figure 11 This is a schematic diagram of a partial structure of the lower end support arm in the middle of the driver's cab side panel of the present invention. Figure 2 .

[0030] Figure 12 This is a top view schematic diagram of the overhead skid conveyor system of the present invention.

[0031] Figure 13 yes Figure 12 A magnified schematic diagram of the structure from a partial side view.

[0032] Figure 14 yes Figure 12 A magnified schematic diagram of the structure from a partial rear view.

[0033] In the picture:

[0034] 1. Skid-driven transmission support device; 11. Roller connecting rod of rolling bed roller; 12. Right-angle support arm; 13. H-shaped horizontal support frame of lifting device; 14. Support device reinforcing plate; 15. Intersection end support reinforcing rib;

[0035] 2. Cab support boom frame; 21. Front boom; 211. L-shaped support square tube; 212. Side end connecting plate of skid transmission support device; 213. First reinforcing plate; 214. Second reinforcing plate; 215. Third reinforcing plate; 216. Fourth reinforcing plate; 22. Rear boom; 23. Upper horizontal connecting rod; 24. Lower horizontal connecting rod; 241. Square tube body; 242. Front boom connecting plate; 243. Rear boom connecting plate; 244. Horizontal reinforcing plate;

[0036] 3. All-model cab underbody support bracket assembly; 31. Cab door lower skirt bracket; 311. Rectangular tube; 312. Boom frame connecting plate; 313. Cab underbody support reinforcement plate; 314. Boom frame connecting plate reinforcement rib; 315. Support block plate; 316. Rubber support block; 317. Door lower skirt X-direction inverted trapezoidal groove; 32. Cab side panel lower middle bracket; 321. Square tube; 322. Boom frame middle connecting plate; 323. Cab underbody middle support reinforcement plate; 324. Boom frame middle connecting plate reinforcement rib; 325. Middle bracket support plate; 326. Middle rubber support block; 327. Side panel middle X-direction inverted trapezoidal groove; 33. Cab side panel rear lower bracket; 331. Rubber support block; 332. Side panel rear X-direction inverted trapezoidal groove;

[0037] 4. Rolling bed; 41. Fixed position X-axis translational rolling bed; 42. Z-axis lifting rolling bed; 43. Y-axis translational rolling bed;

[0038] 5. Vertical lifting mechanism;

[0039] 6. Y-axis translation mechanism;

[0040] 7. Spraying area. Detailed Implementation

[0041] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0044] Example 1

[0045] See Figures 1-14 As shown, the lifting device for spraying paint on the underside of a commercial vehicle cab includes a skid transmission support device 1, a cab support boom frame 2, and a full-model cab underside support bracket assembly 3;

[0046] The two cab support boom frames 2 are symmetrically fixed to the left and right side walls of the skid transmission support device 1 in the Y direction;

[0047] Two sets of full-model cab under-floor support brackets 3 are symmetrically fixed horizontally to the lower inner sidewalls of the two cab support boom frames 2, and each set of full-model cab under-floor support brackets 3 is located at the X-front, middle and rear part of the aligned cab support boom frame 2.

[0048] Each set of the full-vehicle cab under-floor support bracket group 3 includes a cab door lower skirt bracket 31, a cab side wall middle lower end bracket 32, and a cab side wall rear lower end bracket 33; the cab door lower skirt bracket 31 is horizontally and vertically arranged on the inner side wall of the lower front part of the aligned cab support boom frame 2, the cab side wall middle lower end bracket 32 ​​is horizontally fixed to the middle and rear part of the lower end face of the aligned cab support boom frame 2, and the cab side wall rear lower end bracket 33 is horizontally and vertically arranged on the inner side wall of the lower rear part of the aligned cab support boom frame 2.

[0049] The vertical height of the upper surface of the lower end support arm 32 at the center of the cab side panel of each group of the full-vehicle cab under-floor support arm 3 is higher than the vertical height of the upper surface of the lower end support arm 31 at the cab door skirt side panel of each group of the full-vehicle cab under-floor support arm 3; and the vertical height of the upper surface of the upper end support arm 33 at the rear of the cab side panel of each group of the full-vehicle cab under-floor support arm 3 is lower than the vertical height of the upper surface of the upper end support arm 32 at the center of the cab side panel of each group of the full-vehicle cab under-floor support arm 3 is higher than the vertical height of the upper surface of the lower end support arm 31 at the cab door skirt side panel of each group of the full-vehicle cab under-floor support arm 3; The horizontal distance between the inner end of the cab door lower skirt support arm 31 of the cab undercarriage support arm assembly 3 and the vertical plane where the cab support boom frame 2 is located is greater than the horizontal distance between the inner end of the lower middle support arm 32 of the cab side panel and the vertical plane where the cab support boom frame 2 is located. Furthermore, the horizontal distance between the inner end of the lower middle support arm 32 of the cab side panel and the vertical plane where the cab support boom frame 2 is located is greater than the horizontal distance between the inner end of the lower rear support arm 33 of the cab side panel and the vertical plane where the cab support boom frame 2 is located.

[0050] The vertical height difference h1 between the upper end face of the lower end support arm 32 in the middle of the cab side wall and the upper end face of the lower skirt support arm 31 of the cab door is 180mm, and the vertical height difference h2 between the upper end face of the lower end support arm 32 in the middle of the cab side wall and the upper end face of the lower end support arm 33 at the rear of the cab side wall is 110mm.

[0051] The cab door lower skirt support arm 31 and the cab side panel rear lower support arm 33 of each of the full-model cab under-floor support arm groups 3 have the same structure. The cab door lower skirt support arm 31 includes a rectangular tube 311, a boom frame connecting plate 312, a cab under-floor support reinforcing plate 313, a boom frame connecting plate reinforcing rib 314, a support block 315, and a rubber support block 316. The boom frame connecting plate 312 is vertically arranged, and one end of the horizontally arranged rectangular tube 311 is welded and fixed to the boom frame connecting plate 312. The lower part of the inner sidewall of 12, the cab floor support reinforcement plate 313 is welded and fixed to the upper end face of the other end of the rectangular tube 311, the boom frame connecting plate reinforcement rib 314 is vertically welded and fixed to the two end faces of the rectangular tube 311 and the boom frame connecting plate 312 at the fixed position, the boom frame connecting plate 312 is screwed onto the inner sidewall of the lower front part of the cab support boom frame 2, the rubber support block 316 is screwed and fixed to the middle of the upper end face of the support plate 315, and the support plate 315 is matched with the cab floor support reinforcement plate 313 by bolts. Screw-fitted; each set of the full-model cab under-floor support arm group 3 includes a square tube 321, a middle connecting plate 322 of the boom frame, a middle support reinforcement plate 323 of the cab under-floor, a pair of middle connecting plate reinforcement ribs 324 of the boom frame, a middle support block support plate 325, and a middle rubber support block 326; the pair of middle connecting plate reinforcement ribs 324 of the boom frame are symmetrically fixed to the front and rear end faces of the outer end of the square tube 321, which is horizontally arranged in the Y direction; the middle connecting plate 322 of the boom frame... The horizontally mounted structure has its lower end fixed to the upper end of the reinforcing rib 324 of the connecting plate in the middle of a pair of boom frames. The lower end of the middle support reinforcing plate 323 of the cab floor is welded and fixed to the upper end of the inner end of the square tube 321. The middle connecting plate 322 of the boom frame is horizontally fixed to the middle and rear part of the lower end of the aligned cab support boom frame 2. The middle rubber support block 326 is screwed and fixed to the middle part of the upper end of the middle support plate 325. The middle support plate 325 is bolted and screwed to the middle support reinforcing plate 323 of the cab floor.

[0052] The upper end face of the rubber support block 316 of the lower side skirt support arm 31 of the cab door is provided with two inverted trapezoidal grooves 317 in the X direction of the lower side skirt. The upper end face of the rubber support block 331 of the lower rear side support arm 33 of the cab is provided with one inverted trapezoidal groove 332 in the X direction of the rear side. The upper end face of the rubber support block 326 of the lower middle side support arm 32 of the cab is provided with two inverted trapezoidal grooves 327 in the X direction of the middle side.

[0053] Each of the aforementioned cab support boom frames 2 includes a front boom 21, a rear boom 22, an upper horizontal connecting rod 23, and a lower horizontal connecting rod 24. The front boom 21 and the rear boom 22 are arranged in parallel front to rear. The horizontal short arms of the front boom 21 and the horizontal short arms of the rear boom 22 are respectively fixed to the same side end face of the skid transmission support device 1. The two ends of the upper horizontal connecting rod 23 and the two ends of the lower horizontal connecting rod 24 are respectively fixedly connected to the upper and lower parts of the opposite side walls of the vertical long arms of the front boom 21 and the rear boom 22. The boom frame connecting plate 312 is fixed to the lower end of the inner side wall of the vertical long arm of the front boom 21. The middle connecting plate 322 of the boom frame is horizontally fixed to the lower end face of the lower horizontal connecting rod 24 at the middle and rear part. The outer end of the lower end support arm 33 at the rear of the cab side wall is fixed to the lower end of the inner side wall of the rear boom 22 vertically. The front boom 21 and the rear boom 22 have the same structure. The front boom 21 includes an L-shaped support square tube 211, a side end connecting plate 212 of the skid transmission support device, a first reinforcing plate 213, a second reinforcing plate 214, a third reinforcing plate 215, and a fourth reinforcing plate 216. The lower part of the outer side of the side end connecting plate 212 of the skid transmission support device is connected to the horizontal short arm end of the L-shaped support square tube 211. A fixed connection is established, with the inner side of the side-end connecting plate 212 of the skid transmission support device fixedly connected to the outer side of the aligned skid transmission support device 1. A first reinforcing plate 213 is vertically positioned and welded to the two end faces of the connection points of the side-end connecting plate 212 and the L-shaped support square tube 211, respectively. A second reinforcing plate 214 is fixed to the upper part of the aligned side wall of the vertical long arm of the L-shaped support square tube 211, corresponding to the position of the upper horizontal connecting rod 23. A third reinforcing plate 215 is fixed to the lower part of the aligned side wall of the vertical long arm of the L-shaped support square tube 211, corresponding to the lower horizontal connecting rod 24. A fourth reinforcing plate... Plate 216 is fixed to the inner side wall of the lower end of the vertical long arm of L-shaped support square tube 211. The fourth reinforcing plate 216 is matched and screwed to the boom frame connecting plate 312. The lower horizontal connecting rod 24 includes a square tube body 241, a front boom connecting plate 242, a rear boom connecting plate 243, and a horizontal reinforcing plate 244. The front boom connecting plate 242 and the rear boom connecting plate 243 are respectively fixed to the front and rear ends of the square tube body 241 in the length direction. The horizontal reinforcing plate 244 is fixed to the middle and rear part of the lower end face of the square tube body 241. The middle connecting plate 322 of the boom frame is matched and screwed to the horizontal reinforcing plate 244.

[0054] The skid transmission support device 1 includes a pair of roller connecting rods 11, six right-angle support arms 12, a horizontal support frame 13 of a Z-shaped lifting device, and four support device reinforcing plates 14. The six right-angle support arms 12 are symmetrically divided into two groups. The ends of the horizontal arms of the three right-angle support arms 12 in each group are evenly fixed to the upper end face of one roller connecting rod 11 along its length. The lower ends of the vertical arms of the three right-angle support arms 12 in each group are respectively vertically fixed to the upper end face of the intersection of the three Y-direction horizontal arms and the two X-direction horizontal arms of the horizontal support frame 13 of the Z-shaped lifting device. The two support device reinforcing plates 14 are respectively fixed to the lower ends of the outer walls of the front and rear right-angle support arms 12 on the same side. The two support device reinforcing plates 14 on the same side are screwed and fixed to the ends of the horizontal short arms of the front lifting arm 21 and the rear lifting arm 22.

[0055] Each of the right-angle support arms 12 has a fixedly connected intersection end support reinforcing rib 15 at the right-angle inner end, the intersection end of the lower end of the vertical arm of the right-angle support arm 12 with the three Y-direction horizontal arms of the horizontal support frame 13 of the H-shaped lifting device, and the intersection end of the lower end of the vertical arm of the right-angle support arm 12 with the two X-direction horizontal arms of the horizontal support frame 13 of the H-shaped lifting device.

[0056] Example 2

[0057] See Figures 1-14 As shown, the overhead skid conveyor system includes a roller bed 4 with rollers, a vertical lifting mechanism 5, and a Y-axis translation mechanism 6 installed above the factory building. It also includes at least one lifting device for spraying paint onto the undercarriage of a commercial vehicle. The roller bed 4 includes two rows of fixed-position X-axis translation roller beds 41 suspended from the top of the factory building via a steel structure, two Z-axis lifting roller beds 42, and two Y-axis translation roller beds 43. The two vertical lifting mechanisms 5 are fixedly installed on the ground at the X-forward rear end position of the right-hand row of fixed-position X-axis translation roller beds 41. The two Z-axis lifting roller beds 42 are respectively aligned and connected to the two vertical lifting mechanisms 5, and the vertical lifting mechanisms 5 can drive the Z-axis lifting roller beds 42 to rise. The two Y-axis translation mechanisms 6 are respectively suspended on the factory roof at the front and rear ends of the two vertical lifting mechanisms 5, and are respectively aligned and connected below the two Y-axis translation mechanisms 6. Each Y-axis translation roller 43 is on the same horizontal plane as the two fixed X-axis translation rollers 41 before and after Y-axis translation. The pair of roller roller connecting rods 11 at the upper end of the lifting device for spraying paint on the underside of the commercial vehicle cab can slide and contact the roller group on the upper end of the two fixed X-axis translation rollers 41, the roller group on the upper end of the two Z-axis lifting rollers 42, and the roller group on the upper end of the two Y-axis translation rollers 43.

[0058] Working principle

[0059] First, the vertical lifting mechanism 5 at the rear of the X-axis drives the Z-axis lifting roller bed 42, which is connected to the ground, to lower a lifting device for spraying paint on the undercarriage of a commercial vehicle cab to near the ground. The cab to be painted is then transferred from the ground roller bed to directly below the vertical lifting mechanism 5 at the rear of the X-axis. The vertical lifting mechanism 5 drives the Z-axis lifting roller bed 42, which is connected to the ground, to continuously rise along with the lifting device for spraying paint on the undercarriage of a commercial vehicle cab. The two sets of full-model cab undercarriage support arms 3, corresponding to the long and short cabs, respectively contact and support the cab at the corresponding positions at the lower end of the cab, and drive the cab to move steadily vertically upward until the Z-axis lifting roller bed 42 and a row of fixed X-axis translation roller beds 41 on the same side are on the same horizontal plane and stop rising. At this time, the... The roller assembly of the Z-axis lifting roller bed 42 and the roller assembly of the fixed-position X-axis translation roller bed 41 on the same side are controlled and start rotating synchronously. The upper end of the lifting device for spraying paint on the underside of the commercial vehicle cab is completely translated from the Z-axis lifting roller bed 42 to the fixed-position X-axis translation roller bed 41 by the rolling friction of the roller assembly. This continues until the lifting device for spraying paint on the underside of the commercial vehicle cab is conveyed to the spraying area 7. At this point, all roller assemblies stop rotating. After the paint spraying operation on the underside of the cab is completed, the roller assembly of the fixed-position X-axis translation roller bed 41 on the right side and the roller assembly of the Z-axis lifting roller bed 42 located on the same horizontal plane at its front end rotate synchronously, translating the sprayed cab to the position of the front vertical lifting mechanism 5. The rotation of all roller assemblies stops, and the front vertical lifting mechanism 5... The Z-axis lifting roller bed 42, which is connected to the alignment point, lowers the lifting device for spraying paint on the underside of the commercial vehicle cab to near the ground. The painted commercial vehicle cab is placed on the ground transfer roller bed below for transport. Then, the vertical lifting mechanism 5 at the front end drives the Z-axis lifting roller bed 42, which is connected to the alignment point, to reset the lifting device for spraying paint on the underside of the commercial vehicle cab under the no-load condition. The roller group of the Z-axis lifting roller bed 42 at the front end rotates synchronously with the roller group of the Y-axis translation roller bed 43, which is connected to the same horizontal surface at the front end. The no-load lifting device for spraying paint on the underside of the commercial vehicle cab is completely translated onto the Y-axis translation roller bed 43 at the front end. All roller groups stop rotating. The Y-axis translation mechanism 6 at the front end drives the Y-axis translation, transferring the no-load commercial vehicle cab under-load paint... The coating spraying hanger is moved horizontally to the front end of the left-hand fixed-position X-axis translation roller 41. Simultaneously, the rear-end Y-axis translation mechanism 6 drives the rear-end Y-axis translation roller 43 to move in the Y direction to the rear end of the left-hand fixed-position X-axis translation roller 41. The roller groups of the front-end Z-axis lifting roller 42, the left-hand fixed-position X-axis translation roller 41, and the rear-end Y-axis translation roller 43 rotate in opposite directions, completely transferring the unloaded commercial vehicle cab undercarriage coating spraying hanger onto the rear-end Y-axis translation roller 43. All roller groups stop rotating in opposite directions, and the rear-end Y-axis translation mechanism 6 drives the rear-end Y-axis translation roller 43 to reset, moving the unloaded commercial vehicle cab undercarriage coating spraying hanger to the initial position of the rear-end Y-axis translation mechanism 6.This system completes one coating application on the underside of a commercial vehicle cab. Of course, the overhead skid conveyor system can simultaneously connect two to four lifting devices for coating commercial vehicle cab undersides, significantly reducing the waiting time for unloaded devices and improving the efficiency of commercial vehicle cab underside coating operations.

[0060] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A lifting device for spraying paint onto the underside of a commercial vehicle cab, characterized in that: It includes a skid drive support device (1), a cab support boom frame (2), and a cab undercarriage support bracket assembly (3) for all models. The two cab support boom frames (2) are symmetrically fixed to the left and right side walls of the skid transmission support device (1) in the Y direction; Two sets of full-model cab under-floor support brackets (3) are symmetrically fixed horizontally to the lower inner sidewalls of the two cab support boom frames (2), and each set of full-model cab under-floor support brackets (3) is located at the X-front middle and rear part of the aligned cab support boom frame (2).

2. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 1, characterized in that: Each of the full-model cab undercarriage support arm groups (3) includes a cab door lower skirt support arm (31), a cab side wall middle lower end support arm (32), and a cab side wall rear lower end support arm (33); the cab door lower skirt support arm (31) is horizontally and vertically set on the inner side wall of the lower front part of the cab support boom frame (2) in alignment; the cab side wall middle lower end support arm (32) is horizontally fixed to the middle and rear part of the lower end face of the cab support boom frame (2) in alignment; and the cab side wall rear lower end support arm (33) is horizontally and vertically set on the inner side wall of the lower rear part of the cab support boom frame (2).

3. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 2, characterized in that: The vertical height of the upper end face of the lower end support arm (32) in the middle of the cab side wall of each group of the full-vehicle cab under-floor support arm assembly (3) is higher than the vertical height of the upper end face of the lower side skirt support arm (31) of the cab door to the ground. Furthermore, the vertical height of the upper end face of the lower end support arm (33) in the rear of the cab side wall of each group of the full-vehicle cab under-floor support arm assembly (3) is lower than the vertical height of the upper end face of the lower end support arm (32) in the middle of the cab side wall to the ground, but higher than the vertical height of the upper end face of the lower side skirt support arm (31) of the cab door to the ground. The horizontal distance between the inner end of the cab door lower skirt support arm (31) of the cab-type cab undercarriage support arm assembly (3) and the vertical plane where the cab support boom frame (2) is located is greater than the horizontal distance between the inner end of the lower end support arm (32) in the middle of the cab side wall and the vertical plane where the cab support boom frame (2) is located. Furthermore, the horizontal distance between the inner end of the lower end support arm (32) in the middle of the cab side wall and the vertical plane where the cab support boom frame (2) is located is greater than the horizontal distance between the inner end of the lower end support arm (33) in the rear of the cab side wall and the vertical plane where the cab support boom frame (2) is located.

4. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 3, characterized in that: The vertical height difference h1 between the upper end face of the lower end support arm (32) in the middle of the cab side wall and the upper end face of the lower skirt support arm (31) of the cab door is 175mm-185mm, and the vertical height difference h2 between the upper end face of the lower end support arm (32) in the middle of the cab side wall and the upper end face of the lower end support arm (33) at the rear of the cab side wall is 105mm-115mm.

5. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 4, characterized in that: The cab door lower skirt support arm (31) and the cab side panel rear lower support arm (33) of each of the full-model cab under-cab support arm groups (3) have the same structure. The cab door lower skirt support arm (31) includes a rectangular tube (311), a boom frame connecting plate (312), a cab under-cab support reinforcing plate (313), a boom frame connecting plate reinforcing rib (314), a support block support plate (315), and a rubber support block (316). The boom frame connecting plate (312) is vertically arranged, and one end of the horizontally arranged rectangular tube (311) is welded and fixed to the boom frame connecting plate. The lower part of the inner wall of the connecting plate (312), the cab under-support reinforcing plate (313) is welded and fixed to the upper end face of the other end of the rectangular tube (311), the boom frame connecting plate reinforcing rib (314) is vertically welded and fixed to the two ends of the rectangular tube (311) and the boom frame connecting plate (312) at the fixed position, the boom frame connecting plate (312) is screwed onto the inner wall of the lower front part of the cab support boom frame (2), the rubber support block (316) is screwed and fixed to the middle of the upper end face of the support plate (315), and the support plate (315) is bolted to the cab under-support reinforcing plate (315). 313) Matching and screwing fixed; the lower end support arm (32) of the middle part of the cab side wall of each group of the full-model cab under support arm group (3) includes a square tube (321), a middle connecting plate (322) of the boom frame, a middle support reinforcement plate (323) of the cab under body, a pair of middle connecting plate reinforcement ribs (324) of the boom frame, a middle support block support plate (325) and a middle rubber support block 326; a pair of middle connecting plate reinforcement ribs (324) of the boom frame are symmetrically fixed to the front and rear end faces of the outer end of the square tube (321) set horizontally in the Y direction, and the middle connecting plate of the boom frame (322) is set horizontally, and its lower end face is fixed to the upper end of the middle connecting plate reinforcing rib (324) of a pair of boom frames. The lower end face of the middle support reinforcing plate (323) of the cab floor is welded and fixed to the upper end face of the inner end of the square tube (321). The middle connecting plate (322) of the boom frame is horizontally fixed to the middle and rear part of the lower end face of the aligned cab support boom frame (2). The middle rubber support block 326 is screwed and fixed to the middle part of the upper end face of the middle support plate (325). The middle support plate (325) is matched and screwed and fixed to the middle support reinforcing plate (323) of the cab floor by bolts.

6. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 5, characterized in that: The upper end face of the rubber support block (316) of the lower skirt support arm (31) of the cab door is provided with two inverted trapezoidal grooves (317) in the X direction of the lower skirt support arm (33) of the cab side wall. The upper end face of the rubber support block (331) of the lower end support arm (33) of the cab side wall is provided with one inverted trapezoidal groove (332) in the X direction of the rear of the side wall. The upper end face of the middle rubber support block (326) of the lower end support arm (32) of the middle of the cab side wall is provided with two inverted trapezoidal grooves (327) in the X direction of the middle of the side wall.

7. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 6, characterized in that: Each of the aforementioned cab support boom frames (2) includes a front boom (21), a rear boom (22), an upper horizontal connecting rod (23), and a lower horizontal connecting rod (24); the front boom (21) and the rear boom (22) are arranged in parallel front to back, the horizontal short arm of the front boom (21) and the horizontal short arm of the rear boom (22) are respectively fixed to the same side end face of the skid transmission support device (1), the two ends of the upper horizontal connecting rod (23) and the two ends of the lower horizontal connecting rod (24) are respectively fixed to the upper and lower parts of the opposite side walls of the vertical long arm of the front boom (21) and the vertical long arm of the rear boom (22), and the boom frame connecting plate (312) is fixed to the inner side wall of the vertical long arm of the front boom (21). At the lower end, the middle connecting plate (322) of the boom frame is horizontally fixed to the lower rear part of the lower end face of the lower horizontal connecting rod (24), and the outer end of the lower end support arm (33) of the rear side wall of the cab is fixed to the lower end of the inner side wall of the rear boom (22) perpendicular to the long arm; the front boom (21) and the rear boom (22) have the same structure. The front boom (21) includes an L-shaped support square tube (211), a side end connecting plate (212) of the skid transmission support device, a first reinforcing plate (213), a second reinforcing plate (214), a third reinforcing plate (215) and a fourth reinforcing plate (216). The lower part of the outer side of the side end connecting plate (212) of the skid transmission support device is connected to the L-shaped support square tube (211) by water. The flat short arm end is fixedly connected, and the inner side of the side end connecting plate (212) of the skid transmission support device is fixedly connected to the outer side of the aligned skid transmission support device (1). The first reinforcing plate (213) is vertically arranged and welded to the two end faces of the connection positions of the side end connecting plate (212) of the skid transmission support device and the L-shaped support square tube (211). The second reinforcing plate (214) is fixed to the upper part of the vertical long arm alignment side wall of the L-shaped support square tube (211) corresponding to the position of the upper horizontal connecting rod (23). The third reinforcing plate (215) is fixed to the lower part of the vertical long arm alignment side wall of the L-shaped support square tube (211) corresponding to the lower horizontal connecting rod (24). The fourth reinforcing plate (215) is fixed to the lower part of the vertical long arm alignment side wall of the L-shaped support square tube (211). 16) The fourth reinforcing plate (216) is fixed to the inner side wall of the lower end of the vertical long arm of the L-shaped support square tube (211), and is matched and screwed to the boom frame connecting plate (312); the lower horizontal connecting rod (24) includes a square tube body (241), a front boom connecting plate (242), a rear boom connecting plate (243) and a horizontal reinforcing plate (244). The front boom connecting plate (242) and the rear boom connecting plate (243) are respectively fixed to the front and rear ends of the square tube body (241) in the length direction. The horizontal reinforcing plate (244) is fixed to the middle and rear part of the lower end face of the square tube body (241). The middle connecting plate (322) of the boom frame is matched and screwed to the horizontal reinforcing plate (244).

8. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 7, characterized in that: The skid transmission support device (1) includes a pair of roller connecting rods (11), six right-angle support arms (12), a horizontal support frame (13) of a shaped lifting device, and four support device reinforcing plates (14). The six right-angle support arms (12) are symmetrically divided into two groups. The ends of the horizontal arms of the three right-angle support arms (12) in each group are evenly fixed to the upper end face of one roller connecting rod (11) along the length direction. The lower ends of the vertical arms of the three right-angle support arms (12) in each group are respectively vertically fixed to the upper end face of the intersection of the three Y-direction horizontal arms and the two X-direction horizontal arms of the horizontal support frame (13) of the shaped lifting device. The two support device reinforcing plates (14) are respectively fixed to the lower ends of the outer walls of the front and rear right-angle support arms (12) on the same side. The two support device reinforcing plates (14) on the same side are screwed and fixed to the ends of the horizontal short arms of the front lifting arm (21) and the rear lifting arm (22) in alignment.

9. The lifting device for spraying paint on the underside of a commercial vehicle cab according to claim 8, characterized in that: The right-angle inner end of each right-angle support arm (12), the lower end of the vertical arm of the right-angle support arm (12) at the intersection of the three Y-direction horizontal arms of the horizontal support frame (13) of the H-shaped lifting device, and the lower end of the vertical arm of the right-angle support arm (12) at the intersection of the two X-direction horizontal arms of the horizontal support frame (13) of the H-shaped lifting device are all fixedly connected with intersection end support reinforcing ribs (15).

10. An overhead skid conveyor system, characterized in that: The system includes a roller bed (4) with rollers installed above the factory building, a vertical lifting mechanism (5), and a Y-axis translation mechanism (6). It also includes a lifting device for spraying paint on the undercarriage of a commercial vehicle as described in any one of claims 1-9. The roller bed (4) with rollers includes two rows of fixed-position X-axis translation roller beds (41) arranged in parallel in the Y-axis direction, two Z-axis lifting roller beds (42), and two Y-axis translation roller beds (43) suspended from the top of the factory building by a steel structure. The two vertical lifting mechanisms (5) are fixedly installed on the ground at the X-front and rear end positions of the fixed-position X-axis translation roller bed (41) on the right side. The two Z-axis lifting roller beds (42) are respectively aligned and connected to the two vertical lifting mechanisms (5). The vertical lifting mechanism (5) can drive the Z-axis lifting roller beds (42) to rise. The two Y-axis translation mechanisms (6) are respectively suspended on the factory roof at the front and rear ends of the two vertical lifting mechanisms (5) at the same horizontal plane as the fixed X-axis translation roller (41) on the right. The two Y-axis translation rollers (43) are respectively aligned and connected below the two Y-axis translation mechanisms (6). Each Y-axis translation roller (43) is on the same horizontal plane as the two fixed X-axis translation rollers (41) before and after the Y-axis translation. The pair of roller roller connecting rods (11) at the upper end of the lifting device for spraying the paint on the underside of the commercial vehicle cab can slide and contact the roller group on the upper end of the two fixed X-axis translation rollers (41), the roller group on the upper end of the two Z-axis lifting rollers (42), and the roller group on the upper end of the two Y-axis translation rollers (43).

Images