Lifting type skid stand column and spraying production line thereof

Abstract

The utility model relates to a lifting type skid stand column and a spraying production line thereof, and the lifting type skid stand column comprises a skid base, a stand column, a product bracket, a driving conversion device and a lifting transmission device, a skid base is arranged at the bottom, and a stand column and a driving conversion device are arranged on the skid base; a plurality of product supports are arranged on the stand columns from top to bottom, and the upper product support is a lifting product support. And the driving conversion device is connected with each lifting product bracket through a lifting transmission device. The spraying production line is provided with a skid circulating conveying line; a plurality of skid stand columns are conveyed on the skid circulating conveying line; the skid stand column is the lifting type skid stand column; a follow-up driving device is arranged in the operation area of the automatic spraying robot and close to the skid circulating conveying line. And a corresponding driving conversion device is arranged on the skid stand column. The skid stand column can be controlled to rise in a spraying operation area, spraying operation can be conveniently carried out, and therefore the number of products conveyed on line on a production line is increased.

Description

Technical Field

[0001] The utility model relates to a skid column applied to a spraying production line, and a spraying production line adopting the skid column. Background Art

[0002] Spraying is a process of covering paint on the surface of parts. Through spraying, the surface of parts can obtain anti-corrosion property and decoration. At present, with the rapid development of automation technology, a large number of spraying robots have emerged. Special spraying rooms will be built on the product production line, and then one or several spraying robots will be set inside. The spraying robots will carry out automatic spraying on the parts; especially in the field of automotive parts production, automatic spraying robots have been widely used.

[0003] On an automatic spraying production line, generally, parts will be erected on a special conveying device, transferred into the spraying room, automatically sprayed by the spraying robot, then input into the drying room for curing and drying, and finally the sprayed part products are obtained.

[0004] Limited by the space at the production site, skid columns are generally erected on the conveying device, and then the columns are divided into three or more layers. One part to be sprayed is placed on each layer, and then the skid columns are transported into the spraying room together, and the automatic spraying robot is used for spraying operations.

[0005] In the actual production process, the automatic spraying robot is generally an industrial manipulator with multiple degrees of freedom, and its lifting height can reach more than 3 meters. In order to facilitate the installation and debugging of the robot in the spraying room, the height is also relatively high; but limited by the stability during the transmission process and the height of each door on the production line, the height of the skid columns on the conveying device is generally set at more than 2 meters. Especially when producing large and complex curved parts, such as automotive bumpers and other products, there needs to be enough space between the part fixing brackets on the skid columns to facilitate the spray gun of the robot to reach in and carry out spraying; this results in only 2-3 layers of part fixing brackets can be set on the skid columns, such as a bumper painting auxiliary jig with the Chinese patent publication number CN203470298U, a double-layer spraying skid with the Chinese patent publication number CN215878437U, a spraying hanger for an automotive front bumper with the Chinese patent publication number CN109395929A, etc.

[0006] The number of products to be sprayed that can be set on the skid column, in turn, determines the production efficiency of the entire spraying production line; since only 2-3 layers of parts can be set on the columns of each skid, and the number of skids that can be accommodated on each production line is fixed, this results in low efficiency when spraying large and complex curved parts.

[0007] The more products can be placed on the same skid column, the higher the production efficiency of the entire production line, and it is more energy-efficient and saves raw materials; however, the height of the drying oven tunnel on the entire spraying line (hundreds of meters) is relatively low, resulting in limited height of the brackets that can pass through it. Due to the long drying oven tunnel and the need for heating, it consumes a large amount of energy, so it is generally designed to be relatively low and narrow, thereby reducing the internal space and saving heating energy consumption.

[0008] How to improve production efficiency is an urgent problem that all current production enterprises need to solve; for automatic spraying production lines, how to improve the turnover efficiency of components on the production line is also a key problem that needs to be solved. Utility Model Content

[0009] The purpose of the present utility model is to provide a lifting skid column and a spraying production line using the lifting skid column. By setting the lifting skid column, the skid column can load more parts products to be sprayed. When the skid column moves to the area to be sprayed, the column automatically rises and unfolds, expanding the distance between adjacent layers of parts products to be sprayed, enabling the spraying robot to reach in and effectively spray the products; after spraying is completed, when the skid column moves out of the area to be sprayed, the column automatically descends and retracts, reducing the distance between adjacent layers of parts products, making the entire height of the skid column smaller and facilitating turnover, especially passing through the long and low drying oven tunnel.

[0010] To achieve the above utility model purpose, in the first aspect of the present utility model, a lifting skid column is provided, which includes a skid base, a column, a product support, a drive conversion device, and a lifting transmission device;

[0011] A skid base is provided at the bottom, and a column and a drive conversion device are provided on the skid base;

[0012] On the column, several product supports are provided from top to bottom; among them, the lowermost one is a fixed product support fixedly connected to the column, and the upper ones are lifting product supports that can be controlled to perform lifting movements;

[0013] There are 2 or 3 layers of lifting product supports;

[0014] The drive conversion device is connected to each lifting product support through a lifting transmission device.

[0015] As a further improvement of the present utility model, the drive conversion device includes a drive frame and a sliding table;

[0016] The drive frame is fixed on the skid base; a sliding table is provided on the drive frame, and the sliding table can move relative to the drive support;

[0017] The first drive rope of the lifting transmission device is connected to the sliding table.

[0018] Further, a driving wheel is provided outside the sliding table, and the driving wheel can rotate freely.

[0019] Further, a linear sliding component is provided between the sliding table and the driving machine frame;

[0020] Sliding rails are respectively provided on both sides of the driving machine frame, sliders are provided on the sliding rails, and the sliders on both sides are connected to the sliding table.

[0021] Further, a fixed pulley group is provided, and the first driving rope bypasses the fixed pulley group.

[0022] As a further improvement of the present utility model, the driving conversion device directly drives the lifting product support located at the top layer through the driving rope; the lifting product support at the top layer is the first layer support, and the first layer support is installed at the top of the column;

[0023] A fixed pulley or a fixed pulley group is provided at the top of the column to deflect the driving rope;

[0024] A lifting rod is provided at the bottom of the first layer support, and the lifting rod extends downward;

[0025] The end of the driving rope is connected to the lifting rod.

[0026] Further, the driving conversion device is located in the middle, and the driving conversion device outputs the first driving rope;

[0027] The end of the first driving rope is simultaneously connected to 2 second driving ropes;

[0028] A number of fixed pulleys are provided at the top of the column;

[0029] The 2 second driving ropes are respectively deflected through the fixed pulleys, are pulled from the middle to both sides, and are deflected downward in the side columns on both sides, and are finally fixed in the middle or lower part of the lifting rod.

[0030] Further, the driving conversion device outputs the first driving rope; the first driving rope is divided into 2 strands, is deflected through the fixed pulleys, and is respectively input into the side columns; the first driving rope is connected to the second driving rope;

[0031] A fixed pulley is provided at the top of the column; after the second driving rope is deflected around the fixed pulley, it is connected to the middle or lower part of the lifting rod.

[0032] Particularly, a counterweight block is provided on the driving rope between the driving conversion device and the first layer support.

[0033] As a further improvement of the present utility model, the other lifting product supports below the first layer support are connected to the upper layer lifting product support through the driving rope and the movable pulley;

[0034] Other lifting product supports below the first-layer support are provided with movable pulleys; one end of the driving rope is fixed to the lifting product support on the upper layer, and the other end of the driving rope is fixed to the column; both ends of the driving rope are always higher than the movable pulley.

[0035] Furthermore, side columns are provided on the left and right sides of the skid base, and the side columns are hollow columns; the driving rope and the movable pulley for driving other lifting product supports below the first-layer support are located inside the side columns.

[0036] Furthermore, a middle column is provided in the middle of the skid base, and the middle column is a hollow column; the driving rope and the movable pulley for driving other lifting product supports below the first-layer support are located inside the middle column;

[0037] A shielding tube is provided below the middle of the first-layer support, and the shielding tube is nested inside the middle column;

[0038] The driving rope connecting the second-layer support and the first-layer support is located inside the shielding tube.

[0039] As a further improvement of the present utility model, side columns are provided on the left and right sides of the skid base, and a vertical lifting guiding mechanism is provided between the side columns and each lifting product support;

[0040] Lifting rods are provided on both sides of the first-layer support, and the lifting rods are located inside the side columns.

[0041] Furthermore, linear guide rails are fixed inside the side columns, and a number of slidable sliders that can be independent of each other are provided on the linear guide rails;

[0042] The sliders are connected to the bottom of the lifting rods of the first-layer support;

[0043] The sliders are connected to both sides of other lifting product supports below the first-layer support.

[0044] In the second aspect of the present utility model, a spraying production line is provided, which is provided with a skid circulation conveyor line;

[0045] A spray booth and a baking tunnel are provided on the skid circulation conveyor line; an automatic spraying robot is provided in the spray booth; a baking tunnel is provided behind the spray booth;

[0046] A number of skid columns are conveyed on the skid circulation conveyor line; the skid columns are the above-mentioned lifting skid columns;

[0047] In the working area of the automatic spraying robot, a follow-up driving device is provided near the skid circulation conveyor line; a corresponding driving conversion device is provided on the skid column;

[0048] As the skid column is conveyed along the skid loop conveyor line and enters the working area of the automatic spraying robot, the driving conversion device comes into contact with the follow-up driving device, converting the running driving force of the skid loop conveyor line into the upward driving force for lifting the product support.

[0049] As a further improvement of the present utility model, the follow-up driving device has a guiding support;

[0050] On one side of the guiding support close to the skid loop conveyor line, there is a guiding surface, including an upward driving surface, a height maintaining surface, and a downward driving surface; the upward driving surface, the height maintaining surface, and the downward driving surface are continuously connected surfaces;

[0051] The upward driving surface and the downward driving surface are inclined planes inclined relative to the skid loop conveyor line, and the height maintaining surface is a straight plane parallel to the skid loop conveyor line.

[0052] The liftable skid column of the present utility model is driven by the driving conversion device, and through the steering, connection, and driving of each driving rope and pulley, the liftable product support can be lifted. In particular, the first layer support can exceed the height of the fixed support or column, and the distance between adjacent product supports is increased.

[0053] The lifting process of the liftable product support is carried out when the driving conversion device is located in the upward driving surface section of the follow-up driving device.

[0054] When the driving conversion device is located in the height maintaining surface section of the follow-up driving device, the driving conversion device is held, the position of the driving rope is also held, and thus the height positions of each liftable product support are also held, facilitating the specific product spraying operation of the automatic spraying robot.

[0055] When the driving conversion device is located in the downward driving surface section and when the driving conversion device leaves the follow-up driving device, the driving conversion device gradually recovers, the driving rope loses the driving force, and each liftable product support gradually descends under the action of its own gravity, driving the driving rope to reset, thereby reducing the height, and finally the skid column returns to the normal transmission state and enters the drying oven tunnel.

[0056] The liftable skid column of the present utility model and its spraying production line fully overcome the height limitation of the column during the transfer process in the existing production operation, enabling the skid column to be controllably lifted in the spraying operation area, increasing the spraying operation space for the parts to be sprayed, facilitating the spraying operation, and being able to reduce the height after leaving the spraying operation area, facilitating the transmission, especially entering the drying oven tunnel for curing the painted surface after spraying.

[0057] The lifting skid column of the present utility model and its spraying production line can be achieved by simple transformation of the existing production line, thereby significantly increasing the number of products conveyed online on the production line, improving production efficiency, and increasing output. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a schematic view of the use state of the lifting skid column of the present utility model;

[0059] Figure 2 is a schematic view of the overall structure of the follow-up drive device;

[0060] Figure 3 is a top view of the overall structure of the follow-up drive device;

[0061] Figure 4 is a schematic view of the overall structure of the lifting skid column of the present utility model Figure 1 (contracted state);

[0062] Figure 5 is a schematic view of the overall structure of the lifting skid column of the present utility model Figure 2 (unfolding process state);

[0063] Figure 6 is a schematic view of the overall structure of the lifting skid column of the present utility model Figure 3 (fully raised state);

[0064] Figure 7 is a schematic view of the overall structure of the drive conversion device;

[0065] Figure 8 is a schematic view of the internal structure of the drive conversion device;

[0066] Figure 9 is a schematic view of the lifting drive structure of the first layer of the bracket Figure 1 ;

[0067] Figure 10 is a schematic view of the lifting drive structure of the first layer of the bracket Figure 2 ;

[0068] Figure 11 is a schematic view of the lifting drive structure of the first layer of the bracket Figure 3 ;

[0069] Figure 12 is a schematic view of the combined state of the first, second, and third layers of the bracket;

[0070] Figure 13 is a schematic view of the lifting drive structure of the second and third layers of the bracket Figure 1 ;

[0071] Figure 14Schematic diagram of the lifting drive structure for the second and third layer brackets Figure 2 ;

[0072] Figure 15 Schematic diagram of the lifting drive principle for the lifting skid column of the present utility model;

[0073] Figure 16 Overall external shape schematic diagram of the lifting skid column with double-sided counterweights;

[0074] Figure 17 Overall structure schematic diagram of the lifting skid column with double-sided counterweights;

[0075] Figure 18 Schematic diagram of the guide rail structure of the lifting skid column with double-sided counterweights;

[0076] Figure 19 Schematic diagram of the structure where the driving conversion device and the follow-up driving device generate driving force from thrust;

[0077] Figure 20 Schematic diagram of the structure where the driving conversion device and the follow-up driving device generate driving force from tension;

[0078] Figure 21 Overall structure schematic diagram of the spraying production line of the present utility model. Detailed implementation manners

[0079] The following further elaborates in detail on the specific implementation manners of the present utility model in conjunction with the accompanying drawings.

[0080] The lifting skid column of the present utility model is applied to a spraying production line and can be deployed particularly in a spraying booth. For details, reference can be made to Figure 1 , in the working area of the automatic spraying robot 6, a follow-up driving device 1 is provided near the skid circulating conveyor line 7; a corresponding driving conversion device is provided on the skid column 2; when the skid column 2 is transported along with the skid circulating conveyor line 7 and enters the working area of the automatic spraying robot 6, the driving conversion device on the skid column 2 contacts the follow-up driving device 1, converts the running driving force of the skid circulating conveyor line 7 into the lifting driving force of the skid column 2, raises the liftable product brackets on the skid column 2, and increases the spacing between adjacent product brackets, facilitating the automatic spraying robot 6 to perform specific product spraying operations; when the skid column 2 is transported along with the skid circulating conveyor line 7 and leaves the working area of the automatic spraying robot 6, the driving conversion device is disengaged from the follow-up driving device 1, and the liftable product brackets on the skid column 2 automatically descend under the action of their own gravity, and the skid column 2 resumes its normal transmission state.

[0081] To achieve the lifting of the skid column 2, in the working area of the automatic spraying robot 6, near the skid loop conveyor line 7, a special follow-up drive device 1 needs to be set up; for the specific structure, reference can be made to Figure 2 and Figure 3 . The follow-up drive device 1 is installed and fixed by the bracket 11, so that the height of the guiding bracket 12 is preferably higher than the conveying surface of the skid loop conveyor line A; on the side of the guiding bracket 12 close to the skid loop conveyor line A, there is a guiding surface, including a rising drive surface 13, a height-keeping surface 14, and a descending drive surface 15; the rising drive surface 13, the height-keeping surface 14, and the descending drive surface 15 are continuously connected surfaces, and preferably an arc transition is used at the connection; the rising drive surface 13 and the descending drive surface 15 are inclined planes relative to the skid loop conveyor line A, and the height-keeping surface 14 is a straight plane parallel to the skid loop conveyor line A.

[0082] By setting the rising drive surface 13, the drive conversion device of the skid column 2 contacts it, generating an upward driving force for the product bracket. Generally, the entry end of the rising drive surface 13 is close to the skid loop conveyor line 7, and the departure end of the rising drive surface 13 is far from the skid loop conveyor line 7.

[0083] By setting the height-keeping surface 14, the drive conversion device of the skid column 2 contacts it, keeping the product bracket in the raised state; generally, the height-keeping surface 14 remains straight and is far from the skid loop conveyor line 7.

[0084] By setting the descending drive surface 15, the drive conversion device of the skid column 2 contacts it, supporting the product bracket to slowly descend under the action of its own gravity. Generally, the entry end of the descending drive surface 15 is far from the skid loop conveyor line 7, and the departure end of the descending drive surface 15 is close to the skid loop conveyor line 7, so that the drive conversion device returns to the normal state.

[0085] In the above situation, the drive conversion device of the skid column 2, in the normal state, keeps close to the conveying edge of the skid loop conveyor line 7 without forming a protrusion to avoid affecting the conveying; when the skid column 2 rises, the drive conversion device of the skid column 2 is far from (inside or outside) the conveying edge of the skid loop conveyor line 7.

[0086] The lifting skid column 2 of the present utility model has the overall structure as Figure 4 and Figure 5 and Figure 6As shown, different states of the lifting skid column 2 are presented; for the lifting skid column 2 of the present utility model, a skid base 21 is provided at the bottom for cooperation with the skid circulating conveyor line A to achieve transfer and conveyance. A column is provided on the skid base 21, including an intermediate column 22 and two side columns 23, a total of three columns; of course, it may also be provided with only one column, or two side columns 23; the column mainly plays a role in supporting the product bracket. Preferably, a cross beam 212 is provided on the top of the column to connect the columns together, providing top support and at the same time being used for installing and fixing other components.

[0087] Several product brackets are provided on the column from top to bottom; preferably, among them, the lowermost one is a fixed product bracket fixedly connected to the column, and the upper ones are lifting product brackets that can be controlled to perform lifting movements; in this embodiment, four layers of product brackets are provided, which are the first layer bracket 24, the second layer bracket 25, the third layer bracket 26, and the fixed bracket 27 from top to bottom.

[0088] A drive conversion device 28 is also provided on the skid base 21. The drive conversion device 28 is used to combine with the follow-up drive device 1 to generate the driving force for the lifting product brackets (the first layer bracket 24, the second layer bracket 25, the third layer bracket 26).

[0089] The specific structure of the drive conversion device 28, such as Figure 7 、 Figure 8As shown in the figure, it includes a driving frame 281, a sliding table 282, a driving wheel 283, a slide rail 284, a slider 285, a first conversion pulley 286, and a second conversion pulley 287; the driving frame 281 is fixed on the skid base 21 to play a supporting role; a sliding table 282 is provided on the driving frame 281, and a driving wheel 283 is provided outside the sliding table 282. The driving wheel 283 is used to contact the guiding surface of the follow-up driving device 1, and then move along the guiding surface to generate a driving force to drive the sliding table 282 to move; the sliding table 282 preferably moves in a straight line. To ensure the reliable stability of the movement, a linear sliding component is provided between the sliding table 282 and the driving frame 281, that is, slide rails 284 are respectively provided on both sides of the driving frame 281, and sliders 285 are provided on the slide rails 284. The sliders 285 on both sides are connected to the sliding table 282, so that the sliding table 282 moves in a straight line under the limitation of the slide rails 284 and the sliders 285; a first driving rope 291 is connected to the sliding table 282. The first driving rope 291 bypasses the first conversion pulley 286 from the sliding table 282. The first conversion pulley 286 is located outside the driving frame 281 (away from the column). In this embodiment, the driving wheel 283 on the sliding table 282 is driven by the guiding surface (rising driving surface 13) of the follow-up driving device 1 and moves backward (away from the follow-up driving device 1 and approaching the column), driving the fixed end of the first driving rope 291 to move backward, and then turning around the first conversion pulley 286, so that the first driving rope 291 generates a forward movement; the first driving rope 291 continues to bypass the second conversion pulley 287. The second conversion pulley 287 is located below the column and close to the column, so that the first driving rope 291 generates a downward movement, that is, generates a downward pulling force.

[0090] The driving conversion device 28 directly drives the first-layer bracket 24 through the first driving rope 291; the first-layer bracket 24 is installed on the top of the columns (the middle column 22 and the side column 23) and needs to be lifted above the columns; therefore, a fixed pulley or a fixed pulley group is provided on the top of the columns to deflect the first driving rope 291; lifting rods are provided in the middle or on both sides of the first-layer bracket 24. The lifting rods extend downward, preferably located inside the columns, and the bottom of the lifting rods is connected to the end of the first driving rope 291; the driving conversion device 28 drives the first driving rope 291 to move downward. After the first driving rope 291 is deflected by the fixed pulley on the top of the column, it drives the lifting rod to move upward, and finally drives the first-layer bracket 24 to rise.

[0091] Specifically, as shown in Figure 9 、 Figure 10 、 Figure 11As shown in the figure, lifting rods 242 are provided on both sides of the first-layer support 24, and the lifting rods 242 are located inside the side columns 23. Further, a linear guide rail 231 is also fixed inside the side columns 23. A linear slider 232 is installed at the bottom of the lifting rod 242, and the linear slider 232 is installed on the linear guide rail 231, so that the first-layer support 24 and the lifting rod 242 can achieve reliable linear lifting motion under the cooperation of the linear guide rail 231 and the linear slider 232. To improve the stability of the lifting rod 242, preferably, more than 2 linear sliders 232 are provided at the bottom of each side of the lifting rod 242; or, a guide wheel is provided between the top of the lifting rod 242 and the side column 23, finally avoiding unstable situations such as tilting after the lifting rod 242 drives the first-layer support 24 to rise.

[0092] Inside the cross beam 212 at the top of the column 22, several fixed pulleys 241 are provided, and the fixed pulleys 241 form a fixed pulley group. The fixed pulleys 241 are located on both sides, and preferably 2 fixed pulleys 241 are provided on each side, respectively close to the middle column 22 and the side column 23. The end of the first driving rope 291 is simultaneously connected to 2 second driving ropes 293. The 2 second driving ropes 293 are respectively deflected by the fixed pulleys 241, are pulled from the middle to both sides, and are deflected downward inside the side columns 23 on both sides, and are finally fixed to the middle or lower part of the lifting rod 242. The first driving rope 291 drives the lifting rods 242 on both sides of the first-layer support 24 simultaneously through the 2 second driving ropes 293, driving the first-layer support 24 to rise and fall.

[0093] Further, preferably, a counterweight 292 is provided between the first driving rope 291 and the second driving rope 293. The counterweight 292 is relatively heavy and can generate a large downward gravity, thereby offsetting a part of the force generated by each layer of support and accessories on the second driving rope 293, and finally reducing the driving force that the driving conversion device 28 needs to output to the first driving rope 291.

[0094] The first-layer support 24 drives the second-layer support 25 to rise through the driving rope and the movable pulley, and the second-layer support 25 drives the third-layer support 26 to rise through the driving rope and the movable pulley. The driving rope and the movable pulley can be located inside the middle column 22 in the middle or inside the side columns 23 on both sides.

[0095] Specifically, as shown in Figure 12 、 Figure 13 、 Figure 14 the figure, the above-mentioned driving rope and the movable pulley are located in the middle, especially inside the middle column 22.

[0096] The lifting drive of the second-layer support 25 is specifically as follows. A first movable pulley 251 is provided in the middle of the second-layer support 25. One end of the third drive rope 294 is fixed to the first-layer support 24. The third drive rope 294 bypasses the first movable pulley 251 downward, and then the other end of the third drive rope 294 is fixed to the middle column 22 or the cross beam 212 at the top. Both ends of the third drive rope 294 are always higher than the first movable pulley 251. When the first-layer support 24 rises, it drives one end of the third drive rope 294 to rise, and the other end of the third drive rope 294 is fixed, so it drives the first movable pulley 251 to rise synchronously. Further, the first movable pulley 251 drives the second-layer support 25 to rise.

[0097] The lifting drive of the third-layer support 26 is specifically as follows. A second movable pulley 261 is provided in the middle of the third-layer support 26. One end of the fourth drive rope 295 is fixed to the second-layer support 25 (preferably, it can be fixed to the bottom of the bracket of the first movable pulley 251). The fourth drive rope 295 bypasses the second movable pulley 261 downward, and then the other end of the fourth drive rope 295 is fixed to the middle column 22 or the cross beam 212. Both ends of the fourth drive rope 295 are always higher than the second movable pulley 261. When the second-layer support 25 rises, it drives one end of the fourth drive rope 295 to rise, and the other end of the fourth drive rope 295 is fixed, so it drives the second movable pulley 261 to rise synchronously. Further, the second movable pulley 261 drives the third-layer support 26 to rise.

[0098] Preferably, all the above drive ropes, fixed pulleys, and movable pulleys are located inside the columns or cross beams for shielding, so as to prevent the drive ropes and pulleys from being contaminated by sprayed paint, powder, etc. during the use of the lifting skid column 2 of the present invention. Further, since the first-layer support 24 will rise beyond the columns and cross beams, in order to effectively shield the third drive rope 294, a shielding pipe 243 is provided below the middle of the first-layer support 24. The connecting part of the third drive rope 294 and the first-layer support 24 is located inside the shielding pipe 243, and the bottom of the shielding pipe 243 is located inside the middle column 22.

[0099] Sliders 233 and 234 are respectively provided between the left and right sides of the second-layer support 25 and the third-layer support 26 and the linear guide rail 231 to form a linear sliding guide.

[0100] The sliders 232, 233, and 234 share a linear guide rail 231.

[0101] Since the height of the second-layer support 25 after rising is similar to the original height of the first-layer support 24, a long strip through hole 2421 is provided on the connecting lifting rod 242 for both sides of the second-layer support 25 to pass through the connecting lifting rod 242 to connect the slider 233.

[0102] Meanwhile, long strip through holes 235 and 236 are respectively formed in the side columns 23 of the 23 provinces, for both sides of the second layer bracket 25 to pass through the side columns 23 to connect the sliding blocks 233, and for both sides of the third layer bracket 26 to pass through the side columns 23 to connect the sliding blocks 234.

[0103] As Figure 15 shown, it is the schematic diagram of the lifting product bracket of the lifting skid column 2 of the present utility model being driven to rise.

[0104] Action ①, the drive conversion device 28 pulls the first drive rope 291 and the counterweight 292, with a displacement of L1;

[0105] Action ②, the first drive rope 291 simultaneously pulls 2 second drive ropes 293, generating a displacement of L2;

[0106] Action ③, the second drive rope 293 is redirected by the fixed pulley 241 near the middle column 22 and moves horizontally, generating a displacement of L3;

[0107] Action ④, the second drive rope 293 is redirected by the fixed pulley 241 near the side column 23 and connects to the lifting rod 242, pulling upward, generating a displacement of L4;

[0108] Action ⑤, the first layer bracket 24 is driven to rise, generating an upward displacement of H5;

[0109] Action ⑥, while the first layer bracket 24 rises, it pulls the third drive rope 294, causing the third drive rope 294 to generate a displacement of L6;

[0110] Action ⑦, the third drive rope 294 drives the second layer bracket 25 to rise through the first movable pulley 251, generating an upward displacement of H7;

[0111] Action ⑧, while the second layer bracket 25 rises, it pulls the fourth drive rope 295, causing the fourth drive rope 295 to generate a displacement of L8;

[0112] Action ⑨, the fourth drive rope 295 drives the third layer bracket 26 to rise through the second movable pulley 261, generating an upward displacement of H9.

[0113] In the above actions ①, ②, ③, ④, ⑤, and ⑥, fixed pulleys are used, or direct fixed connections are made, so L1 = L2 = L3 = L4 = H5 = L6.

[0114] In the above action ⑦, a movable pulley is used, so H7 = 0.5 × L6.

[0115] In the above action ⑧, a direct fixed connection is made, so L8 = H7.

[0116] In the above-mentioned operation ⑨, a movable pulley is used, so H9 = 0.5 × L8.

[0117] In summary, the rising height of the first-layer bracket 24 (the absolute height relative to the skid base 21) is H5 = L1;

[0118] The rising height of the second-layer bracket 25 (the absolute height relative to the skid base 21) is H7 = 0.5 × H5;

[0119] The rising height of the third-layer bracket 26 (the absolute height relative to the skid base 21) is H9 = 0.5 × H7 = 0.25 × H5.

[0120] Furthermore, the height increase of the first-layer bracket 24 relative to the second-layer bracket 25 is Δh1 = H5 - H7 = 0.5 × H5;

[0121] The height increase of the second-layer bracket 25 relative to the third-layer bracket 26 is Δh2 = H7 - H9 = 0.5 × H7 = 0.25 × H5;

[0122] The height increase of the third-layer bracket 26 relative to the fixed bracket 27 (skid base 21) is Δh3 = H9 = 0.5 × H7 = 0.25 × H5.

[0123] In practical applications, limited by factors such as the installation and fixing position of the driving rope and the dead zone, the rising height of each lifting product bracket will be lower than the theoretical value; especially considering the accumulation of the dead zone, the height increase Δh3 of the third-layer bracket 26 relative to the fixed bracket 27 will be slightly less than the height increase Δh2 of the second-layer bracket 25 relative to the third-layer bracket 26.

[0124] The lifting skid column 2 of the present utility model is driven by a driving conversion device 28. Through the steering, connection, and driving of each driving rope and pulley, the lifting product bracket can be lifted, especially enabling the first-layer bracket 24 to exceed the height of the fixed bracket or column, and the distance between adjacent product brackets is increased.

[0125] The rising process of the lifting product bracket is carried out when the driving conversion device 28 is located on the rising driving surface 13 section of the follow-up driving device 1.

[0126] When the driving conversion device 28 is located on the height holding surface 14 section of the follow-up driving device 1, the driving conversion device 28 is held, the position of the driving rope is also held, and thus the height positions of each lifting product bracket are also held, facilitating the specific product spraying operation by the automatic spraying robot C.

[0127] When the drive conversion device 28 is located on the descending drive surface 15 section and the drive conversion device 28 leaves the follow-up drive device 1, the drive conversion device 28 gradually recovers, the drive rope loses the driving force, and each lifting product bracket gradually descends under the action of its own gravity, driving the drive rope to reset.

[0128] As Figure 16 、 Figure 17 、 Figure 18 shown, a schematic diagram of another structural form of the lifting skid column 2 of the present utility model is given. Side columns 23 are respectively provided on both sides of the skid base 21, and there is no middle column 22 in the middle; all drive ropes and movable pulleys are installed in the side columns 23; the tops of the two side columns 23 are connected together by a cross beam 212.

[0129] The drive rope mechanisms of each lifting product bracket are provided with two sets, which are respectively located in the side columns 23 on both sides; and there is only one drive conversion device 28, which is installed in the middle of the skid base 21; the first drive rope 291 is divided into two strands, and after being turned by the third conversion pulley 288 and the fourth conversion pulley 289, it is respectively input into the side columns 23.

[0130] A counterweight 292 is connected to the top of the first drive rope 291 located in the side column 23, and counterweights 292 are respectively provided in the side columns 23 on both sides. A second drive rope 293 is connected above the counterweight 292.

[0131] A fixed pulley 241 is provided at the top of the side column 23. After the second drive rope 293 is turned around the fixed pulley 241, it is connected to the middle part of the lifting rod 242.

[0132] A linear guide rail 231 is fixed in the side column 23, and slidable blocks 232, 233, and 234 are provided on the linear guide rail 231; among them, the slidable block 232 is located in the middle and is connected to the bottom of the lifting rod 242, and the top of the lifting rod 242 is connected to both sides of the first layer bracket 24; the slidable block 233 is located above and passes through the long strip through hole 2421 and is connected to both sides of the second layer bracket 25; the slidable block 234 is located below and is connected to both sides of the third layer bracket 26.

[0133] Preferably, the first movable pulley 251 is installed together with the slidable block 233. The third drive rope 294 passes around the first movable pulley 251. One end of the third drive rope 294 is connected to the top of the lifting rod 242 or both sides of the first layer bracket 24, and the other end of the third drive rope 294 is connected to the top of the linear guide rail 231 or the side column 23.

[0134] As Figure 18As shown, the second movable pulley 261 is installed together with the slider 234. The fourth driving rope 295 passes around the second movable pulley 261. One end of the fourth driving rope 295 passes through the slider 232 and is connected to the slider 233, and the other end of the fourth driving rope 295 is connected to the top or the side column 23 of the linear guide 231.

[0135] For the above-mentioned double-sided weighted lifting skid column 2, its lifting principle is the same as that of the aforementioned lifting skid column 2, only the installation positions of the driving ropes and pulleys are slightly different.

[0136] In the above embodiment, the driving conversion device 28 abuts against the guiding surface of the follow-up driving device 1 through the sliding table 282 and the driving wheel 283, especially against the rising driving surface 13, so that the sliding table 282 and the driving wheel 283 move backward to generate and transmit the driving force, pulling the first driving rope 291, and finally realizing the rising of the first layer of bracket 24, as Figure 19 shown.

[0137] Actually, the guiding surface of the follow-up driving device 1 can also be set in the reverse direction, as Figure 20 shown, that is, the height maintaining surface 14 faces away from the skid circulating conveyor line A (close to the automatic spraying robot C in the legend) outward, and then the driving wheel 283 of the driving conversion device 28 is hooked on the guiding surface of the follow-up driving device 1, especially moving along the rising driving surface 13, so that the sliding table 282 and the driving wheel 283 move forward, directly generating and transmitting the driving force, pulling the first driving rope 291, and finally realizing the rising of the first layer of bracket 24.

[0138] The above-mentioned follow-up driving device 1 and the driving conversion device 28 are both horizontally arranged, converting the horizontal force into a vertical driving force to drive the first layer of bracket 24 to rise; in fact, the follow-up driving device 1 and the driving conversion device 28 can also be vertically arranged to make contact and directly generate a driving force in the vertical direction.

[0139] The present invention also relates to a spraying production line applying the above-mentioned lifting skid column, as Figure 21 shown, including a skid circulating conveyor line 7, on which there are a spray booth 5 and a baking tunnel 4; a long and narrow baking tunnel 4 is arranged behind the spray booth 5; for the specific structure inside the spray booth 5, refer to Figure 1 ;

[0140] There is 1 or more than 1 automatic spraying robot 6 inside the spray booth 5;

[0141] There are several skid columns 2 conveyed on the skid circulating conveyor line 7;

[0142] There are several layers of product brackets on the skid column 2; there are parts to be sprayed on each layer of product bracket;

[0143] The skid column 2 is the above-mentioned lifting skid column;

[0144] In the working area of the automatic spraying robot 6, a follow-up driving device 1 is provided near the skid circulating conveyor line 7; a corresponding driving conversion device is provided on the skid column 2;

[0145] The skid column 2 is conveyed along with the skid circulating conveyor line 7. When the skid column 2 enters the spray booth 5 and approaches the automatic spraying robot 6, the upper product support of the skid column 2 rises, and the distance between adjacent product supports increases, so that the spraying operation space of the parts to be sprayed is increased, forming the skid column 2` in the raised state;

[0146] After the parts are sprayed, when the skid column 2 leaves the automatic spraying robot 6 and leaves the spray booth 5, the upper product support of the skid column 2 descends, and the distance between adjacent product supports decreases. The skid column 2 resumes the conventional transmission state and enters the baking tunnel 4 with the sprayed parts for paint curing.

[0147] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. Lifting sled column, characterized in that, It includes a skid base, a column, a product bracket, a drive conversion device, and a lifting transmission device; There is a skid base at the bottom, and a column and a drive conversion device are provided on the skid base; On the column, several product brackets are provided from top to bottom; among them, the lowermost one is a fixed product bracket fixedly connected to the column, and the upper ones are lifting product brackets that can be controlled to perform lifting movements; The lifting product brackets are provided with 2 or 3 layers; The drive conversion device is connected to each lifting product bracket through a lifting transmission device.

2. The lift skid column according to claim 1, characterized in that, The drive conversion device includes a drive frame and a sliding table; The drive frame is fixed on the skid base; a sliding table is provided on the drive frame, and the sliding table can move relative to the drive bracket; A first drive rope of the lifting transmission device is connected to the sliding table.

3. The lifting skid column according to claim 2, wherein, A drive wheel is provided outward on the sliding table, and the drive wheel can rotate freely.

4. The lift skid column according to claim 2, wherein, A linear sliding component is provided between the sliding table and the drive frame; Sliding rails are respectively provided on both sides of the drive frame, sliders are provided on the sliding rails, and the sliders on both sides are connected to the sliding table.

5. The lifting skid column according to claim 2, wherein, A fixed pulley group is provided, and the first drive rope bypasses the fixed pulley group.

6. The liftable skid column according to claim 1, characterized in that, The drive conversion device directly drives the lifting product bracket at the top layer through the drive rope; the lifting product bracket at the top layer is the first layer bracket, and the first layer bracket is installed at the top of the column; A fixed pulley or a fixed pulley group is provided at the top of the column to deflect the drive rope; A lifting rod is provided at the bottom of the first layer bracket, and the lifting rod extends downward; The end of the drive rope is connected to the lifting rod.

7. The lift skid column according to claim 6, characterized in that, The drive conversion device is located in the middle, and the drive conversion device outputs the first drive rope; The end of the first drive rope is simultaneously connected to 2 second drive ropes; Several fixed pulleys are provided at the top of the column; The 2 second drive ropes are respectively deflected by the fixed pulleys, are pulled from the middle to both sides, and are deflected downward in the side columns on both sides, and finally fixed to the middle or lower part of the lifting rod.

8. The lifting skid column according to claim 6, characterized in that, The drive conversion device outputs the first drive rope; the first drive rope is divided into 2 strands, is deflected by the fixed pulleys, and is respectively input into the side columns; the first drive rope is connected to the second drive rope; A fixed pulley is provided at the top of the column; after the second drive rope is deflected by winding around the fixed pulley, it is connected to the middle or lower part of the lifting rod.

9. The liftable skid column according to any one of claims 6-8, characterized in that, A counterweight block is provided on the drive rope between the drive conversion device and the first layer bracket.

10. The liftable skid column according to claim 1, wherein The other lifting product brackets below the first layer bracket are connected to the upper layer lifting product bracket through a drive rope and a movable pulley; Movable pulleys are provided in the other lifting product brackets below the first layer bracket; one end of the drive rope is fixed to the upper layer lifting product bracket, and the other end of the drive rope is fixed to the column; both ends of the drive rope are always higher than the movable pulley.

11. The lifting skid column according to claim 10, characterized in that, Side columns are provided on the left and right sides of the skid base, and the side columns are hollow columns; the drive ropes and movable pulleys for driving the other lifting product brackets below the first layer bracket are located in the side columns.

12. The lift sled column according to claim 10, characterized in that, An intermediate column is provided in the middle of the skid base, and the intermediate column is a hollow column; the drive ropes and movable pulleys for driving the other lifting product brackets below the first layer bracket are located in the intermediate column; A shielding tube is provided below the middle of the first layer bracket, and the shielding tube is nested in the intermediate column; The drive rope connecting the second layer bracket and the first layer bracket is located in the shielding tube.

13. The lift skid column according to claim 1, wherein Side columns are provided on the left and right sides of the skid base, and a vertical lifting guide mechanism is provided between the side columns and each lifting product support. Lifting rods are provided on both sides of the first-layer support, and the lifting rods are located inside the side columns.

14. The lift skid column according to claim 13, characterized in that, Linear guides are fixed inside the side columns, and a number of sliders that can slide independently of each other are provided on the linear guides. The sliders are connected to the bottoms of the lifting rods of the first-layer support. The sliders are connected to both sides of other lifting product supports below the first-layer support.

15. Spray production line, characterized in that, A skid circulating conveyor line is provided. A spray booth and a drying oven tunnel are provided on the skid circulating conveyor line; an automatic spraying robot is provided in the spray booth; a drying oven tunnel is provided behind the spray booth. A number of skid columns are conveyed on the skid circulating conveyor line; the skid columns are the lifting skid columns described in any one of claims 1-14. In the working area of the automatic spraying robot, a follow-up drive device is provided close to the skid circulating conveyor line; a corresponding drive conversion device is provided on the skid column. When the skid column is conveyed by the skid circulating conveyor line and enters the working area of the automatic spraying robot, the drive conversion device contacts the follow-up drive device, and converts the running driving force of the skid circulating conveyor line into the rising driving force of the lifting product support.

16. The spraying production line according to claim 15, characterized in that, The follow-up drive device has a guide bracket. On the side of the guide bracket close to the skid circulating conveyor line, a guide surface is provided, including a rising drive surface, a height-keeping surface, and a descending drive surface; the rising drive surface, the height-keeping surface, and the descending drive surface are continuously connected surfaces. The rising drive surface and the descending drive surface are inclined planes inclined relative to the skid circulating conveyor line, and the height-keeping surface is a straight plane parallel to the skid circulating conveyor line.

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