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, a jacking device and a connecting rod, a skid base is arranged at the bottom; a plurality of layers of product supports are arranged on the stand columns from top to bottom. The driving conversion device is horizontally arranged, the jacking device is vertically arranged, and the driving conversion device and the jacking device are connected together; a sliding table on the jacking device is connected with a connecting rod, and the connecting rod is connected with the first-layer support; the other lifting product supports below the first layer of support are connected with the upper layer of lifting product support through driving ropes and movable pulleys. 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. 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 Technique

[0002] Spraying is a process of covering paint on the surface of parts. Through spraying, the surface of parts can obtain anti-corrosion 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 one or several spraying robots will be set inside. The spraying robots will perform 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 placed on a special conveying device, transferred into the spraying room, automatically sprayed by the spraying robot, then input into the baking 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 spraying operation is carried out by the automatic spraying robot.

[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 column 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 column to facilitate the spray gun of the robot to reach in and perform spraying; this results in only 2-3 layers of part fixing frames being able to be set on the skid column, 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] Moreover, the number of products to be sprayed that can be set on the skid column determines the production efficiency of the entire spraying production line; since the number of parts that can be set on each skid column can only be 2-3 layers, 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 (several hundred meters) is relatively low, resulting in limited height of the brackets that can pass through. Due to the long drying oven tunnel and the need for heating, it consumes a lot 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 component transfer efficiency on the production line is also a key problem to be solved. Summary of the Invention

[0009] The purpose of the present invention 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, so that the spraying robot can reach in and effectively spray the products; after spraying, 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 skid column have a smaller height and facilitating circulation, especially it can pass through the long and low drying oven tunnel.

[0010] To achieve the above-mentioned invention purpose, in the first aspect of the present invention, a lifting skid column is provided, which includes a skid base, a column, a product bracket, a drive conversion device, a jacking device and a connecting rod;

[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 layers of product brackets are provided from top to bottom, including a liftable product bracket that can be controlled to perform lifting movement; there are more than 2 layers of liftable product brackets; the topmost is the first layer bracket, and the one below it is the second layer bracket;

[0013] The drive conversion device is horizontally arranged, and the jacking device is vertically arranged, and the two are connected together;

[0014] The sliding table on the drive conversion device and the sliding table on the jacking device move synchronously;

[0015] The sliding table on the jacking device is connected to the connecting rod, and the connecting rod is connected to the first layer bracket;

[0016] For other liftable product brackets below the first layer bracket, they are connected to the upper layer liftable product bracket through a drive rope and a movable pulley;

[0017] Other lifting product brackets below the first-layer bracket are provided with movable pulleys; one end of the driving rope is fixed on the lifting product bracket of the upper layer, and the other end of the driving rope is fixed on the column; both ends of the driving rope are always higher than the movable pulley.

[0018] As a further improvement of the present utility model, the driving conversion device includes a driving machine frame and a sliding table; the driving machine frame is fixed on the skid base; a sliding table is provided on the driving machine frame, and the sliding table can move relative to the driving bracket;

[0019] The jacking device includes a machine frame and a sliding table; the machine frame is vertically arranged and is connected to the driving machine frame; a sliding table is provided on the machine frame, and the sliding table can move vertically up and down along the machine frame; a connecting rod is installed on the sliding table;

[0020] The sliding table of the driving conversion device is connected to the sliding table of the jacking device through a jacking transmission device.

[0021] Furthermore, a linear guiding mechanism is provided between the sliding table of the driving conversion device and the driving machine frame;

[0022] Similarly, a linear guiding mechanism is provided between the sliding table of the jacking device and the machine frame;

[0023] The linear guiding mechanism includes a slide rail and a slider; the slide rail is arranged on both sides of the driving machine frame or the machine frame; sliders are provided on the slide rail;

[0024] The sliders on both sides are connected to the sliding table.

[0025] Furthermore, a driving wheel is provided outside the sliding table of the driving conversion device, and the driving wheel can rotate freely.

[0026] Furthermore, the jacking transmission device is a steel ball;

[0027] The driving machine frame is connected to the machine frame, and their internal chambers are interconnected to form a horizontal chamber and a vertical chamber, and an arc surface is provided at the connection of the chambers;

[0028] A number of independent steel balls are provided in the interconnected chamber, and the steel balls form a steel ball string;

[0029] The sliding table of the driving conversion device extends into the chamber of the driving machine frame and contacts the horizontal end of the steel ball string;

[0030] The sliding table of the jacking device extends into the chamber of the machine frame and contacts the vertical end of the steel ball string;

[0031] Furthermore, the jacking transmission device is a chain;

[0032] The driving machine frame is connected to the machine frame, and their internal chambers are interconnected to form a horizontal chamber and a vertical chamber, and an arc surface is provided at the connection of the chambers;

[0033] A chain is provided in the through cavity;

[0034] The sliding table of the drive conversion device extends into the cavity of the drive frame and is connected to the horizontal end of the chain;

[0035] The sliding table of the lifting device extends into the cavity of the frame and is connected to the vertical end of the chain.

[0036] Furthermore, the lifting transmission device is a movable rope and a fixed pulley group;

[0037] One end of the drive rope is connected to the sliding table of the drive conversion device, and the sliding table drives the part of the drive rope located inside the drive frame of the drive conversion device to move outwards;

[0038] The drive frame of the drive conversion device is connected to the frame of the lifting device, and the internal cavities of the two are in through connection. A second fixed pulley is provided at the connection of the cavities. The drive rope passes around the second fixed pulley and enters the frame of the lifting device upwards;

[0039] A third conversion pulley is provided at the top of the frame of the lifting device. The drive rope passes upwards around the third conversion pulley and then downwards, and the end of the drive rope is connected to the sliding table of the lifting device.

[0040] 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;

[0041] Lifting rods are provided on both sides of the first-layer support. The lifting rods are located inside the side columns; the lifting rods can extend upwards beyond the side columns.

[0042] Furthermore, linear guide rails are fixed inside the side columns, and a number of independently slidable sliders are provided on the linear guide rails;

[0043] The sliders are connected to the bottom of the lifting rods of the first-layer support;

[0044] The sliders are connected to both sides of other lifting product supports below the first-layer support.

[0045] Furthermore, the side columns are square tubes; the lifting rods on both sides of the first-layer support are square tubes;

[0046] Guide wheel groups are provided on the square tubes of the lifting rods of the first-layer support. The guide wheel groups match the square tubes of the side columns to form a vertical lifting guiding mechanism;

[0047] Guide wheel group modules are provided on both sides of the second-layer support. The guide wheel group modules are located inside the square tubes of the lifting rods of the first-layer support. Guide wheels are provided on the guide wheel group modules. The guide wheel group modules match the square tubes of the lifting rods to form a vertical lifting guiding mechanism;

[0048] On both sides of the other lifting product brackets below the second-layer bracket, there are guide wheel group modules. The guide wheel group modules are located inside the square tubes of the side columns. There are guide wheels on the guide wheel group modules. The guide wheel group modules match the square tubes of the side columns to form a vertical lifting guide mechanism.

[0049] Furthermore, the movable pulleys arranged inside the other lifting product brackets below the first-layer bracket are located outside both sides of the lifting product brackets;

[0050] The movable pulleys are installed on the sliders or inside the guide wheel group modules.

[0051] Furthermore, a fixed pulley is provided at the top of the side column;

[0052] One end of the weight-reducing rope is connected to the lower part of the lifting rod of the first-layer bracket, and the other end of the weight-reducing rope is connected to the counterweight block. The weight-reducing rope bypasses the fixed pulley downward;

[0053] The counterweight block is located at the lower part of the side column.

[0054] In the second aspect of the present utility model, a spraying production line is provided, which is equipped with a skid conveyor loop;

[0055] There are a spray booth and a baking tunnel on the skid conveyor loop; an automatic spraying robot is provided in the spray booth; a baking tunnel is provided behind the spray booth;

[0056] There are several skid columns transported on the skid conveyor loop; the skid columns are the above-mentioned lifting skid columns;

[0057] In the working area of the automatic spraying robot, a follow-up driving device is provided close to the skid conveyor loop; a corresponding driving conversion device is provided on the skid column;

[0058] When the skid column is transported along with the skid conveyor loop and enters the working area of the automatic spraying robot, the driving conversion device contacts the follow-up driving device, and converts the running driving force of the skid conveyor loop into the rising driving force of the lifting product bracket.

[0059] As a further improvement of the present utility model, the follow-up driving device has a guiding bracket;

[0060] On one side of the guiding bracket close to the skid conveyor loop, there is a guiding surface, including a rising driving surface, a height-keeping surface, and a descending driving surface; the rising driving surface, the height-keeping surface, and the descending driving surface are continuously connected surfaces;

[0061] The rising driving surface and the descending driving surface are inclined planes inclined relative to the skid conveyor loop, and the height-keeping surface is a straight plane parallel to the skid conveyor loop.

[0062] The lifting skid column of the present utility model is driven by a drive conversion device and a jacking device, causing the first-layer bracket to rise, especially exceeding the height of the column; 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, and finally rise synchronously with the first-layer bracket; and the rising heights of the lifting product brackets on each layer are different, decreasing in sequence, thereby increasing the distance between adjacent product brackets.

[0063] The rising process of the lifting product bracket is carried out when the drive conversion device is located on the rising drive surface section of the follow-up drive device.

[0064] When the drive conversion device is located on the height-holding surface section of the follow-up drive device, the drive conversion device is held, the jacking device and the connecting rod are also held, and the drive rope and the like are also held. Furthermore, the height positions of the lifting product brackets on each layer are also held, facilitating the specific product spraying operation by the automatic spraying robot.

[0065] When the drive conversion device is located on the descending drive surface section and the drive conversion device leaves the follow-up drive device, the drive conversion device loses the external force. Furthermore, the jacking device and the connecting rod also lose the driving force. Each lifting product bracket is affected by its own gravity and gradually descends, driving the connecting rod to descend for resetting, thereby reducing the height. At the same time, the drive conversion device and the jacking device also perform resetting. Finally, the skid column returns to the conventional transmission state and enters the drying oven tunnel.

[0066] The lifting skid column of the present utility model and its spraying production line fully overcome the height limitation of the column during the transfer process of the conveyor line in the existing production operation, enabling the skid column to be controllably raised within the spraying operation area, increasing the spraying operation space for the parts to be sprayed, facilitating the spraying operation, and being able to lower the height after leaving the spraying operation area, facilitating the transmission, especially entering the drying oven tunnel for curing the painted surface after spraying.

[0067] The lifting skid column of the present utility model and its spraying production line can be realized by simply modifying the existing production line, thereby significantly increasing the number of products conveyed online by the production line, improving production efficiency, and increasing output. Description of the Drawings

[0068] Figure 1 is a schematic diagram of the use state of the lifting skid column of the present utility model;

[0069] Figure 2 is a schematic diagram of the overall structure of the follow-up drive device;

[0070] Figure 3 is a top view of the overall structure of the follow-up drive device;

[0071] Figure 4Schematic diagram of the overall shape of the lifting skid column of the present utility model;

[0072] Figure 5 Schematic diagram of the lifting drive structure of the first layer bracket of the present utility model;

[0073] Figure 6 Schematic diagram of the overall structure of the drive conversion component of the present utility model;

[0074] Figure 7 Schematic diagram of the internal structure of Structure 1 of the drive conversion component of the present utility model;

[0075] Figure 8 Schematic diagram of the internal structure of Structure 2 of the drive conversion component of the present utility model;

[0076] Figure 9 Schematic diagram of the combined state of the first, second, and third layer brackets of the present utility model

[0077] Figure 10 Schematic diagram of the overall structure of the side column component of the present utility model;

[0078] Figure 11 Schematic diagram of the internal structure of the lifting drive of the present utility model;

[0079] Figure 12 Schematic diagram of the internal structure of the lifting drive of the first layer bracket;

[0080] Figure 13 Schematic diagram of the internal structure of the lifting drives of the second and third layer brackets;

[0081] Figure 14 Schematic diagram of the overall structure of the lifting rod assembly of the first layer bracket;

[0082] Figure 15 Schematic diagram of the overall structure of the slider assemblies of the second and third layer brackets;

[0083] Figure 16 Schematic diagram of the structure for installing the liftable product bracket through sliders and slide rails;

[0084] Figure 17 Schematic diagram of the structure where the drive conversion device and the follow-up drive device generate driving force by thrust;

[0085] Figure 18 Schematic diagram of the structure where the drive conversion device and the follow-up drive device generate driving force by tension;

[0086] Figure 19 Drive principle diagram of the first, second, and third layer brackets of the present utility model;

[0087] Figure 20This is the overall structural schematic diagram of the spraying production line of the present utility model. Specific embodiments

[0088] The following further elaborates on the specific embodiments of the present utility model in conjunction with the accompanying drawings.

[0089] The lifting skid column of the present utility model is applied to the spraying production line and can be unfolded particularly in the spraying booth. Specifically, 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 conveyed 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 support of the skid column 2, and increases the distance between adjacent product supports, facilitating the automatic spraying robot 6 to perform specific product spraying operations; when the skid column 2 is conveyed 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 support of the skid column 2 automatically descends under the action of its own gravity, and the skid column 2 returns to the normal transmission state.

[0090] To realize the lifting of the skid column 2, a dedicated follow-up driving device 1 needs to be provided near the skid circulating conveyor line 7 in the working area of the automatic spraying robot 6; the specific structure can be referred to Figure 2 , Figure 3 , the follow-up driving device 1 is fixedly installed by the support 11, so that the height of the guiding support 12 is preferably higher than the conveying surface of the skid circulating conveyor line A; on the side of the guiding support 12 close to the skid circulating conveyor line A, a guiding surface is provided, including a rising driving surface 13, a height maintaining surface 14, and a descending driving surface 15; the rising driving surface 13, the height maintaining surface 14, and the descending driving surface 15 are continuously connected surfaces, and preferably an arc transition is used at the connection; the rising driving surface 13 and the descending driving surface 15 are inclined planes relative to the skid circulating conveyor line A, and the height maintaining surface 14 is a flat straight surface parallel to the skid circulating conveyor line A.

[0091] By setting the rising driving surface 13, the driving conversion device of the skid column 2 contacts it to generate the rising driving force of the product support. Generally, the entering end of the rising driving surface 13 is close to the skid circulating conveyor line 7, and the leaving end of the rising driving surface 13 is far from the skid circulating conveyor line 7.

[0092] By setting the height maintaining surface 14, the driving conversion device of the skid column 2 contacts it to keep the product support in the raised state; generally, the height maintaining surface 14 remains straight and is far from the skid circulating conveyor line 7.

[0093] By setting the descending drive surface 15, the drive conversion device of the skid column 2 comes into contact with it, supporting the product bracket to slowly descend under the action of its own gravity. Generally speaking, the entry end of the descending drive surface 15 is far from the skid circulating conveyor line 7, and the departure end of the descending drive surface 15 is close to the skid circulating conveyor line 7, so that the drive conversion device returns to its normal state.

[0094] In the above situation, the drive conversion device of the skid column 2, in its normal state, remains close to the conveying edge of the skid circulating 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 moves away from (inside or outside) the conveying edge of the skid circulating conveyor line 7.

[0095] The key point of the present utility model is to conduct a specific structural design on the lifting skid column 2, such as Figure 4 As shown, side columns 23 are respectively provided on both sides of the skid base 21; the first-layer bracket 24 is connected to the drive conversion device 28 through a connecting rod 32 and a jacking device 31 for direct jacking drive; while the second-layer bracket 25 and the third-layer bracket 26 are driven and connected by a drive rope and a movable pulley structure, and the drive element is installed inside the side column 23.

[0096] As Figure 5 shown, the overall structural schematic diagram of the lifting drive of the first-layer bracket 24 is given; a jacking device 31 is vertically provided behind the drive conversion device 28, so as to directly convert the force generated by the contact between the dynamic conversion device 28 and the follow-up drive device 1 into a vertical force and output it to the connecting rod 32, making the connecting rod 32 move vertically upward to directly jack up the first-layer bracket 24; both sides of the first-layer bracket 24 are installed inside the side column 23 through lifting rods 242 for guiding and supporting; the lifting rods 242 can extend upward beyond the side column 23, so that the first-layer bracket 24 can rise above the side column 23.

[0097] The drive conversion device 28 and the jacking device 31 are combined together to form the drive conversion assembly of the present utility model, as Figure 6 、 Figure 7 、 Figure 8 shown; the drive conversion device 28 is horizontally arranged, the jacking device 31 is vertically arranged, and the two are connected together.

[0098] Among them, the drive conversion device 28 includes a drive frame 281, a sliding table 282, a drive wheel 283, a slide rail 284, and a slider 285; the drive wheel 283 comes into contact with the rising drive surface 13 of the follow-up drive device 1 to generate a backward movement.

[0099] The external structure of the lifting device 31 is basically the same as that of the drive conversion device 28, including a frame 311, a sliding table 312, slide rails 314, and sliders 315; the frame 311 is vertically arranged and preferably connected to the drive frame 281; a sliding table 312 is provided on the frame 311, and the sliding table 312 can move vertically up and down along the frame 311; to improve the reliability of the vertical up and down movement of the sliding table 312, slide rails 314 are also provided on both sides of the frame 311, the slide rails 314 are vertically arranged, and sliders 315 are installed on the slide rails 314; the sliders 315 on both sides are connected to the sliding table 312; a connecting rod 32 is installed on the sliding table 312.

[0100] As Figure 7 shown, between the drive conversion device 28 and the lifting device 31, the driving force is transmitted through steel balls 316; the drive frame 281 is connected to the frame 311, and their internal chambers are in communication with each other, forming a horizontal chamber and a vertical chamber, and an arc surface 313 is provided at the connection of the chambers; several independent steel balls 316 are provided in the communicating chambers, and the steel balls 316 form a string of steel balls; the sliding table 282 extends into the chamber of the drive frame 281 and contacts the horizontal end of the string of steel balls; the sliding table 312 extends into the chamber of the frame 311 and contacts the vertical end of the string of steel balls. The driving wheel 283 is pushed by the rising driving surface 13 of the follow-up driving device 1, driving the sliding table 282 to move, and the sliding table 282 moves horizontally inward, thereby pushing the string of steel balls to move. The string of steel balls is in rigid contact and can smoothly pass through the arc surface 313, reaching the vertical chamber from the horizontal chamber, thereby pushing the sliding table 312 upward, and finally driving the connecting rod 32 to drive the first-layer bracket 24 upward.

[0101] In addition to the steel balls 316, the sliding table 282 and the sliding table 312 can also be connected by a chain. The links of the chain are also rigid bodies, but can also smoothly pass through the arc surface 313 to convert the horizontal thrust into a vertical thrust.

[0102] As Figure 8As shown in the figure, between the drive conversion device 28 and the jacking device 31, the driving force is transmitted through the drive rope 317 (or drive chain); inside the drive conversion device 28, there are a first conversion pulley 286 and a second conversion pulley 287. The first conversion pulley 286 is located at the front, and the second conversion pulley 287 is located at the rear. The horizontal inward movement of the sliding table 282 is converted into the downward movement of the drive rope 317; and inside the top of the frame 311, there is a third conversion pulley 318. After the drive rope 317 is turned by the second conversion pulley 287, it bypasses the third conversion pulley 318 upward, so that the movement direction turns upward. The end of the drive rope 317 is connected to the sliding table 312. Through the turning of the drive rope 317 by the first conversion pulley 286, the second conversion pulley 287, and the third conversion pulley 318, the horizontal inward movement of the sliding table 282 is converted into the vertical upward movement of the sliding table 312, and finally the drive connecting rod 32 drives the first-layer bracket 24 to move upward.

[0103] For the lifting skid column 2 of the present utility model, the upward driving mechanism for the first-layer bracket 24 is concentrated in the jacking device 31, and finally the driving force is transmitted upward through the connecting rod 32, making the equipment more compact. Moreover, the jacking device 31 and the drive conversion device 28 can be used as independent components and produced separately, and thus the connection with the first-layer bracket 24 is more convenient.

[0104] To directly drive the first-layer bracket 24 to rise, a large gravity needs to be overcome. Therefore, generally, a counterweight structure needs to be set up to offset the downward gravity generated on the first-layer bracket 24, thereby reducing the upward jacking force that the jacking device 31 needs to apply.

[0105] A counterweight block 292 is arranged inside the square tube of the side column 23; as Figure 11 、 Figure 12 shown, a fixed pulley 244 is installed at the top of the side column 23; one end of the weight reduction rope 296 is connected to the lower part of the lifting rod 242, the other end of the weight reduction rope 296 is connected to the counterweight block 292, and the weight reduction rope 296 bypasses the fixed pulley 244 downward. The counterweight block 292 always generates a downward gravity, and through the fixed pulley 244, an upward pulling force is applied to the lifting rod 242 to offset part of the gravity of the first-layer bracket 24.

[0106] The second-layer bracket 25 and the third-layer bracket 26 are driven by a drive rope and a movable pulley structure and are installed inside the side column 23. As Figure 9 、 Figure 10 、 Figure 11 、 Figure 13 、 Figure 14 、 Figure 15As shown, the inner wall of the side column 23 is used for guiding; the side column 23 is a square tube, and the lifting rods 242 on both sides of the first-layer bracket 24 are also square tubes. A guide wheel set 245 is provided at the bottom of the lifting rod 242. The guide wheel set 245 matches the inner wall of the side column 23, so that the lifting rod 242 can be guided by the guide wheel set 245 in the side column 23 to realize stable lifting movement and drive the first-layer bracket 24 to lift; while the second-layer bracket 25 and the third-layer bracket 26 adopt the guide wheel set module 255 / 265, as Figure 15 shown, a square tube is used as the bracket 2551, and a number of guide wheels 2552 are provided on the bracket 2551. The guide wheels 2552 form a guide wheel set; among them, the guide wheel set module 255 is installed in the square tube of the lifting rod 242, so the guide wheel set formed by the guide wheels 2552 abuts against the four sides of the inner wall of the square tube of the lifting rod 242 to form a vertical movement guiding support; and the guide wheel set module 265 is installed in the square tube of the side column 23, so the guide wheel set formed by the guide wheels 2552 abuts against the four sides of the inner wall of the square tube of the side column 23 to form a vertical movement guiding support.

[0107] The bracket 2551 is provided with a connecting block 2553 inward for connecting with the second-layer bracket 25 or the third-layer bracket 26. Long strip through holes are correspondingly provided on the inner side wall of the lifting rod 242 and the inner side wall of the side column 23. For example, the inner side wall of the lifting rod 242 is provided with a through hole 2421 for the connecting block 2553 to pass through.

[0108] The inside of the bracket 2551 is a cavity for the driving rope to pass through; a movable pulley 251 / 261 is also provided inside the bracket 2551.

[0109] As Figure 13 shown, one end of the third driving rope 294 is fixed on the lifting rod 242, the other end of the third driving rope 294 is fixed on the side column 23, and the third driving rope 294 bypasses the movable pulley 251 inside the guide wheel set module 255 downward; the connecting block 2553 on the guide wheel set module 255 passes through the through hole and is connected to the second-layer bracket 25; when the first-layer bracket 24 moves upward, the movable pulley 251 is driven through the third driving rope 294, and then the guide wheel set module 255 and the second-layer bracket 25 are driven to move upward together.

[0110] One end of the fourth driving rope 295 is fixed on the guide wheel set module 255, the other end of the fourth driving rope 295 is fixed on the side column 23, and the fourth driving rope 295 bypasses the movable pulley 261 inside the guide wheel set module 265 downward; the connecting block 2553 on the guide wheel set module 265 passes through the through hole and is connected to the third-layer bracket 26; when the guide wheel set module 255 and the second-layer bracket 25 move upward together, the movable pulley 261 is driven through the fourth driving rope 295, and then the guide wheel set module 265 and the third-layer bracket 26 are driven to move upward together.

[0111] As shown Figure 16 in the figure, the liftable product support can also be installed in the side column 23 through sliders and slide rails; a long slide rail 231 is vertically fixed in the side column 23, and several independently sliding sliders are installed on it; the lifting rod 242 is connected to the slide rail 231 through the first slider 232. The first slider 232 is located at the bottom of the lifting rod 242, and the top of the lifting rod 242 is connected to the first-layer support 24; a long through hole 2421 is formed inside the lifting rod 242. A second slider 233 is provided above the first slider 232. The second slider 233 is exposed at the through hole 2421 and is connected to the second-layer support 25; a third slider 234 is provided at the lower part of the slide rail 231, and the third slider 234 is connected to the third-layer support 26.

[0112] Moving pulleys are provided on the second slider 233 and the third slider 234. The moving pulley 261 connected to the third-layer support 26 is shown in the figure; a driving rope is wound around the moving pulley. One end of the driving rope is connected to the side column 23, and the other end of the driving rope is connected to the slider or support of the upper-layer support. That is, the fourth driving rope 295 is shown in the figure. One end of the fourth driving rope 295 is connected to the side column 23, and the other end of the fourth driving rope 295 is connected to the second slider 233; correspondingly, one end of the third driving rope 294 is connected to the side column 23, and the other end of the third driving rope 294 is connected to the upper part of the lifting rod 242.

[0113] In the above embodiment, the driving rope and moving pulley structure adopted by the second-layer support 25 and the third-layer support 26 can be arranged on one side or on both sides (driving on both sides simultaneously).

[0114] 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 driving force, pulling the first driving rope 291, and finally realizing the rising of the first-layer support 24, as Figure 17 shown in the figure.

[0115] Actually, the guiding surface of the follow-up driving device 1 can also be set in the reverse direction, as Figure 18 shown in the figure, that is, the height maintaining surface 14 faces away from the sled 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 to directly generate and transmit driving force, pulling the first driving rope 291, and finally realizing the rising of the first-layer support 24.

[0116] The above-mentioned follower drive device 1 and drive conversion device 28 are both horizontally arranged, converting the horizontal force into a vertical driving force to drive the first-layer bracket 24 to rise. In fact, the follower drive device 1 and drive conversion device 28 can also be vertically arranged to make contact and directly generate a driving force in the vertical direction.

[0117] As Figure 19 shown, it is the schematic diagram of the lifting of the lifting product bracket of the lifting skid column 2 of the present invention driven by the drive.

[0118] Action ①, the drive conversion device 28 generates a displacement L1;

[0119] Action ②, the drive conversion device 28 acts on the jacking device 31 to make it generate a displacement L2 in the height direction;

[0120] Action ③, the jacking device 31 drives the connecting rod 32 to generate a displacement L3 in the height direction;

[0121] Action ④, the first-layer bracket 24 is driven to rise, generating an upward displacement H4;

[0122] Action ⑤, while the first-layer bracket 24 rises, it pulls the third drive rope 294, causing the third drive rope 294 to generate a displacement L5;

[0123] Action ⑥, the third drive rope 294 drives the second-layer bracket 25 to rise through the first movable pulley 251, generating an upward displacement H6;

[0124] Action ⑦, while the second-layer bracket 25 rises, it pulls the fourth drive rope 295, causing the fourth drive rope 295 to generate a displacement L7;

[0125] Action ⑧, the fourth drive rope 295 drives the third-layer bracket 26 to rise through the second movable pulley 261, generating an upward displacement H8.

[0126] In the above actions ①, ②, ③, ④, and ⑤, they are all directly fixedly connected, so L1 = L2 = L3 = H4 = L5.

[0127] In the above action ⑥, a movable pulley is used, so H6 = 0.5 × L5.

[0128] In the above action ⑦, it is directly fixedly connected, so L7 = H6.

[0129] In the above action ⑧, a movable pulley is used, so H8 = 0.5 × L7.

[0130] To sum up, the rising height of the first-layer bracket 24 (the absolute height relative to the skid base 21) is H4 = L1;

[0131] The lifting height of the second-layer bracket 25 (the absolute height relative to the skid base 21) is H6 = 0.5×H4;

[0132] The lifting height of the third-layer bracket 26 (the absolute height relative to the skid base 21) is H8 = 0.5×H6 = 0.25×H4.

[0133] Furthermore, the height increase of the first-layer bracket 24 relative to the second-layer bracket 25 is Δh1 = H4 - H6 = 0.5×H4;

[0134] The height increase of the second-layer bracket 25 relative to the third-layer bracket 26 is Δh2 = H6 - H8 = 0.5×H6 = 0.25×H4;

[0135] The height increase of the third-layer bracket 26 relative to the fixed bracket 27 (skid base 21) is Δh3 = H8 = 0.5×H6 = 0.25×H4.

[0136] In practical applications, limited by factors such as the installation and fixing position of the driving rope and the dead zone, the lifting height of each lifting product bracket will be lower than the theoretical value; especially considering the accumulation of dead zones, 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.

[0137] The lifting skid column 2 of the present utility model is driven by a driving conversion device 28 and a jacking device 31, so that the first-layer bracket 24 exceeds the height of the column; and the following lifting brackets are connected by a driving rope and a movable pulley structure, and rise synchronously with the first-layer bracket 24, but the rising heights are not the same, so the distance between adjacent product brackets is increased.

[0138] 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.

[0139] When the driving conversion device 28 is located on the height maintaining 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 further the height positions of the lifting product brackets are also held, which is convenient for the automatic spraying robot C to carry out specific product spraying operations.

[0140] When the driving conversion device 28 is located on the descending driving surface 15 section and the driving conversion device 28 leaves the follow-up driving device 1, the driving conversion device 28 gradually recovers, the driving rope loses the driving force, and each lifting product bracket is affected by its own gravity and gradually descends, driving the driving rope to reset.

[0141] The present utility model also relates to a spraying production line using the above-mentioned lifting skid column, such as Figure 20As shown in the figure, it includes a skid loop conveyor line 7, on which there is a spray booth 5 and a baking tunnel 4; immediately behind the spray booth 5 is a long and narrow baking tunnel 4; for the specific structure inside the spray booth 5, refer to Figure 1 ;

[0142] There is 1 or more automatic spraying robots 6 inside the spray booth 5;

[0143] There are several skid columns 2 being conveyed on the skid loop conveyor line 7;

[0144] There are several layers of product brackets on the skid columns 2; on each layer of product brackets, there are parts to be sprayed;

[0145] The skid columns 2 are the above-mentioned lifting skid columns;

[0146] In the working area of the automatic spraying robot 6, a follow-up driving device 1 is provided close to the skid loop conveyor line 7; corresponding driving conversion devices are provided on the skid columns 2;

[0147] The skid columns 2 are conveyed along with the skid loop conveyor line 7. When the skid columns 2 enter the spray booth 5 and approach the automatic spraying robot 6, the upper product brackets of the skid columns 2 rise, and the distance between adjacent product brackets increases, so that the spraying operation space for the parts to be sprayed is enlarged, forming the skid columns 2` in the raised state;

[0148] After the parts are sprayed, when the skid columns 2 leave the automatic spraying robot 6 and leave the spray booth 5, the upper product brackets of the skid columns 2 descend, and the distance between adjacent product brackets shrinks. The skid columns 2 return to the normal transmission state and carry the sprayed parts into the baking tunnel 4 for paint curing.

[0149] The preferred embodiments of the present utility model have been specifically described above, but the present utility model 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 utility model, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A lifting sled column, characterized in that: It includes a skid base, a column, a product support, a drive conversion device, a lifting device and a connecting rod; A sled base is provided at the bottom, and a column and a drive conversion device are provided on the sled base; On the column, there are several layers of product supports from top to bottom, including a lifting product support arranged on the top that can be controlled to move up and down; the lifting product support is provided with more than 2 layers; the topmost is the first layer support, and the lower part is the second layer support; The drive conversion device is arranged horizontally, and the lifting device is arranged vertically, and the two are connected together; The sliding table on the driving conversion device and the sliding table on the lifting device move synchronously; The sliding platform on the jacking device is connected to the connecting rod, and the connecting rod is connected to the first-layer support; Other lifting product supports below the first layer of supports are connected to the lifting product supports of the upper layer through driving ropes and movable pulleys; A movable pulley is arranged on other lifting product brackets under the first-layer bracket; one end of a driving rope is fixed on the lifting product bracket of the upper layer, and the other end of the driving rope is fixed on the column; both ends of the driving rope are always higher than the movable pulley.

2. The lifting 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 sled base; the drive frame is provided with a sliding table, and the sliding table can move relative to the drive bracket; The lifting device includes a frame and a sliding table; The frame is arranged vertically, and the frame is connected with the driving frame; a sliding platform is arranged on the frame, and the sliding platform can move vertically up and down along the frame; a connecting rod is installed on the sliding platform; The sliding platform of the driving conversion device is connected with the sliding platform of the lifting device through a lifting transmission device.

3. The lifting skid column according to claim 2, characterized in that: A linear guide mechanism is provided between the sliding table of the drive conversion device and the drive frame; A linear guide mechanism is also provided between the sliding platform of the jacking device and the frame; The linear guide mechanism includes a slide rail and a slider; the slide rail is arranged on both sides of the drive frame or the frame; the slider is arranged on the slide rail; The slide blocks on both sides are connected with the sliding table.

4. The lifting skid column according to claim 2, characterized in that: The sliding platform of the drive conversion device is provided with a driving wheel outwardly, and the driving wheel can rotate freely.

5. The lifting skid column according to claim 2, characterized in that: The lifting transmission device is a steel ball; The drive frame is connected to the frame, and the internal chambers of the two are connected to form a horizontal chamber and a vertical chamber, and a curved surface is provided at the connection of the chambers; A plurality of mutually independent steel balls are arranged in the through chamber, and the steel balls form a steel ball string; The sliding table of the drive conversion device extends into the chamber of the drive frame and contacts the horizontal end of the steel ball string; The sliding table of the lifting device extends into the chamber of the frame and contacts the vertical end of the steel ball string.

6. The lifting skid column according to claim 2, characterized in that: The lifting transmission device is a moving rope and a fixed pulley set; The sliding platform of the drive conversion device is connected to one end of the drive rope, and the sliding platform drives the part of the drive rope located in the drive frame of the drive conversion device to move outward; The driving frame of the drive conversion device is connected to the frame of the jacking device, and the internal chambers of the two are connected. A second fixed pulley is provided at the connection of the chambers. The driving rope passes through the second fixed pulley and enters the frame of the jacking device upward. A third conversion pulley is arranged on the top of the frame of the jacking device, and a driving rope goes around the third conversion pulley upwards and goes downwards, and the end of the driving rope is connected with the sliding platform of the jacking device.

7. The lifting skid column according to claim 1, characterized in that: Side columns are provided on the left and right sides of the sled base, and vertical lifting guide mechanisms are provided between the side columns and each lifting product bracket; Lifting rods are arranged on both sides of the first-layer bracket, and the lifting rods are located inside the side columns; the lifting rods can exceed the side columns upwards.

8. The lifting skid column according to claim 7, characterized in that: A linear guide is fixed inside the side column, and a plurality of slide blocks which can slide independently of each other are arranged on the linear guide; The sliding block is connected to the bottom of the lifting rod of the first-layer bracket; The slide block is connected to both sides of other lifting product brackets below the first layer bracket.

9. The lifting skid column according to claim 7, characterized in that: The side columns are square tubes; the lifting rods on both sides of the first-layer bracket are square tubes; A guide wheel set is provided on the square tube of the lifting rod of the first-layer bracket, and the guide wheel set matches the square tube of the side column to form a vertical lifting guide mechanism; Guide wheel modules are provided on both sides of the second-layer bracket, and the guide wheel modules are located in the square tube of the lifting rod of the first-layer bracket. Guide wheels are provided on the guide wheel modules, and the guide wheel modules match the square tube of the lifting rod to form a vertical lifting guide mechanism; Guide wheel modules are provided on both sides of other lifting product brackets under the second-layer bracket. The guide wheel modules are located in the square tubes of the side columns. Guide wheels are provided on the guide wheel modules. The guide wheel modules match the square tubes of the side columns to form a vertical lifting guide mechanism.

10. The lifting skid column according to claim 8 or 9, characterized in that: The movable pulleys arranged in other lifting product brackets below the first-layer bracket are located outside the two sides of the lifting product bracket; The movable pulley is installed on the slider or in the guide wheel module.

11. The lifting skid column according to claim 7, characterized in that: A fixed pulley is provided on the top of the side column; One end of the weight-reducing rope is connected to the lower part of the lifting rod of the first-layer support, and the other end of the weight-reducing rope is connected to the counterweight block, and the weight-reducing rope is passed downward around the fixed pulley; The counterweight is located at the lower part of the side column.

12. Spraying production line, characterized in that, Equipped with a skid circulation conveyor line; There are spray booths and drying tunnels on the sled circulation conveyor line; there is an automatic spraying robot in the spray booth; there is a drying tunnel behind the spray booth; A plurality of slide columns are transported on the slide circulation conveyor line; the slide columns are lifting slide columns as described in any one of claims 1 to 11; In the working area of ​​the automatic spraying robot, a follow-up drive device is provided near the sled circulation conveyor line; a corresponding drive conversion device is provided on the sled column; When the sled column is transported along the sled circulation conveyor line and enters the working area of ​​the automatic spraying robot, the drive conversion device contacts the follow-up drive device to convert the operating driving force of the sled circulation conveyor line into the rising driving force of the lifting product bracket.

13. The spraying production line according to claim 12, characterized in that: The follow-up drive device has a guide bracket; A guide surface is provided on the side of the guide bracket close to the sled circulation conveyor line, including an ascending driving surface, a height-keeping surface, and a descending driving surface; the ascending driving surface, the height-keeping surface, and the descending driving surface are continuously connected surfaces; The ascending driving surface and the descending driving surface are inclined surfaces inclined relative to the sliding sled circulating conveying line, and the height maintaining surface is a flat surface parallel to the sliding sled circulating conveying line.

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