Rotary positioning device for skid conveying system

Abstract

The invention discloses a rotary positioning device for a skid conveying system. The rotary positioning device comprises a conveying guide rail horizontally arranged in the direction of a production line. A plurality of skid supports which are arranged at intervals are movably arranged on the conveying guide rail, a carrier is rotationally arranged on each skid support, a rotary spraying jig used for containing workpieces is arranged on each carrier, and a butt joint driving mechanism used for driving the carriers to rotate is arranged on one side of the conveying guide rail. The two ends of the conveying guide rail are each provided with a clamping mechanism used for conducting lateral clamping and positioning on the skid support. All the carriers can be sequentially driven to rotate only through one butt joint driving mechanism, and the equipment investment cost is low; dust removal and piece taking and placing can be carried out simultaneously, so that the production efficiency is greatly improved; the whole process is free of manual participation and high in automation degree.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of conveying equipment, in particular to a rotating positioning device for a skid conveying system. BACKGROUND

[0002] The structure of skid as conveying carrier is widely used in logistics conveying line system, among which it is most widely used in welding and coating workshops of automobile production plants, and is mainly applied to various storage, conveying and process line bodies in welding and coating workshops, and has the following characteristics: the same skid conveying carrier can be used to realize step-by-step and continuous conveying modes, and different conveying pitches of the skid can be realized according to different process requirements; the circulation conveying of the skid carrier can be realized in multiple conveying lines; and the empty skid can be stacked and stored, thereby reducing the length and space of the empty skid storage line and saving costs.

[0003] In the coating workshop of automobile production, when dry ice dust removal and electrostatic dust removal are performed on workpieces, in order to realize all-around dust removal of the workpieces, the workpieces need to be rotated. The existing skid conveying system usually rotates the workpieces by driving the jigs and the workpieces thereon to rotate together through a motor; however, since the existing skid conveying system basically adopts step-by-step or continuous conveying mode, a large number of jigs for storing workpieces are arranged along the production line direction, and if a motor is separately arranged at each jig position to drive the jigs to rotate, the equipment investment cost is very high; if all the jigs are driven to rotate together through one motor, a plurality of transmission modules need to be arranged between adjacent jigs, and each time the workpieces are taken out or placed, the machine needs to be stopped, which causes the dust removal operation to be interrupted, and after the workpieces are taken out or placed, the machine can be started again to perform the dust removal operation, which makes the workpiece dust removal and the taking out or placing of the workpieces cannot be performed simultaneously, and the production efficiency is not ideal.

[0004] Therefore, it is necessary to invent a rotating positioning device for a skid conveying system to solve the above problems. SUMMARY

[0005] The present application aims to provide a rotating positioning device for a skid conveying system, which can drive all the carriers to rotate in sequence through only one docking driving mechanism, and the equipment investment cost is low; dust removal and workpiece taking out or placing can be performed simultaneously, thereby greatly improving the production efficiency, to solve the problems of high equipment investment cost and low production efficiency of the existing skid conveying system as described in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A rotary positioning device for a skid conveyor system includes a conveyor rail arranged horizontally along the production line direction; a plurality of skid supports are movably arranged on the conveyor rail, and a carrier is rotatably mounted on each skid support. A rotary spraying fixture for placing workpieces is mounted on the carrier. A docking drive mechanism for driving the carrier to rotate is provided on one side of the conveyor rail, and clamping mechanisms for laterally clamping and positioning the skid supports are provided at both ends of the conveyor rail.

[0008] Preferably, the carrier includes a fixed base, a rotating shaft, and a driven sprocket. The fixed base is mounted on a skid bracket. The bottom end of the rotating shaft is rotatably mounted on the fixed base via a bearing. The driven sprocket is fixedly mounted on the rotating shaft. The rotating spray fixture is connected to the top end of the rotating shaft. The top surface of the driven sprocket is provided with a plurality of circumferentially distributed positioning pins and guide wheels.

[0009] Preferably, the rotary spraying fixture includes a base plate, a support shaft, and a material frame. The base plate is fixed to the top surface of the driven sprocket, the support shaft is erected on the base plate, and the material frame is connected to the top of the support shaft.

[0010] Preferably, the docking drive mechanism includes a square tube frame, a moving platform, a translation drive assembly, and a sprocket drive assembly. The square tube frame is arranged outside the conveying guide rail. The moving platform is movably arranged at the top of the square tube frame. The translation drive assembly is arranged on the square tube frame and is used to drive the moving platform to move toward the carrier. The sprocket drive assembly is installed at one end of the moving platform.

[0011] Preferably, the translation drive assembly includes at least two linear guide rails and a first cylinder. The two linear guide rails are arranged in parallel on the square tube frame. The bottom of the moving stage is provided with a first slider that is movably sleeved on the two linear guide rails. The piston rod of the first cylinder is connected to the moving stage.

[0012] Preferably, the sprocket drive assembly includes a synchronous motor, a first synchronous pulley, a transmission base, a first transmission shaft, a second transmission shaft, a second synchronous pulley, and a transmission component. The synchronous motor and the transmission base are both horizontally mounted on the top surface of the moving platform. The first synchronous pulley is mounted on the output shaft of the synchronous motor. The first and second transmission shafts are both rotatably mounted on the transmission base and are perpendicular to each other. The first and second transmission shafts are connected by a worm gear structure. One end of the first transmission shaft extends horizontally outside the transmission base and the second synchronous pulley is mounted on its extended end. A conveyor belt is wound around the first and second synchronous pulleys. One end of the second transmission shaft extends vertically below the transmission base and the transmission component is connected to its extended end.

[0013] Preferably, the transmission component includes a turntable and pins. The extension end of the second transmission shaft is connected to two turntables. A plurality of pins are circumferentially mounted between the two turntables. A plurality of pins are arranged on the edge of the turntables. A tooth groove is formed between two adjacent pins to mesh with the teeth of the driven sprocket.

[0014] Preferably, the clamping mechanism includes a guide slide assembly arranged on one outer side of the conveying guide rail and a side pressure assembly arranged on the other outer side of the conveying guide rail. The guide slide assembly includes a first support frame, a third angle iron and a limiting guide rail. One end of the first support frame extends toward the outer periphery of the driven sprocket. The third angle iron is connected to the extended end of the first support frame. The limiting guide rail is mounted on the third angle iron and fits against the outer wheel surface of the guide wheel.

[0015] Preferably, the guide slide assembly includes a first bolt, a profile plate, and a spring. The shank of the first bolt is connected to the third angle iron by at least one nut. The profile plate has a hollow inner cavity along its axial direction. The side wall of the profile plate has a clamping hole for the shank of the first bolt to pass through. The head of the first bolt is in contact with the inner cavity wall. The spring is sleeved on the shank of the first bolt. One end of the spring abuts against the third angle iron, and the other end presses against the side wall of the profile plate. The limiting guide rail is installed on the profile plate.

[0016] Preferably, the side pressure assembly includes a second support frame, a second slider, a second cylinder, and a pressure rail. One end of the second support frame extends toward the outer periphery of the driven sprocket. The second slider is movably mounted on the second support frame. The piston rod of the second cylinder is connected to the second slider. The pressure rail is mounted on the second slider.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: During the dust removal process of the workpiece, since the docking drive mechanism only rotates the carrier that has reached its position, the workpiece picking and placing on the skid brackets at the loading and unloading ends of the conveying guide rail are not affected, and dust removal and workpiece picking and placing can be carried out simultaneously, thereby greatly improving production efficiency; no manual intervention is required throughout the process, and the degree of automation is high; there is no need to set up multiple sets of motors and transmission modules, and all carriers can be driven to rotate sequentially by a single docking drive mechanism, resulting in low equipment investment costs; and at the loading and unloading ends of the conveying guide rail, the clamping mechanism can press the carrier tightly to keep the carrier and the rotating spray jig stable and stationary, thereby improving the accuracy of workpiece picking and placing. Attached Figure Description

[0018] Figure 1 This is a top view of the rotary positioning device for the skid conveying system of the present invention;

[0019] Figure 2 This is a front view of the rotary positioning device for the skid conveying system of the present invention at the docking drive mechanism;

[0020] Figure 3For the present invention Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a perspective view of the docking drive mechanism of the present invention;

[0022] Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 This is a front view of the docking drive mechanism of the present invention;

[0024] Figure 7 This is a top view of the docking drive mechanism of the present invention;

[0025] Figure 8 This is a front view of the rotary positioning device for the skid conveying system of the present invention at the clamping mechanism;

[0026] Figure 9 For the present invention Figure 8 Enlarged view of point C in the middle;

[0027] Figure 10 For the present invention Figure 8 Enlarged view of point D in the middle.

[0028] In the diagram: 1. Conveying guide rail; 2. Skid bracket; 3. Carrier; 31. Fixed base; 32. Rotating shaft; 33. Driven sprocket; 34. Positioning pin; 35. Guide wheel; 4. Rotary spraying fixture; 41. Seat plate; 411. Positioning hole; 412. Center hole; 42. Support shaft; 421. Insertion hole; 43. Material frame; 5. Docking drive mechanism; 51. Square tube frame; 52. Moving table; 53. Translation drive assembly; 531. Linear guide rail; 532. First cylinder; 533. First slider; 534. Positioning angle iron one; 535. Anti-collision rubber block; 536. Positioning angle iron two; 54. Sprocket drive assembly 541. Synchronous motor; 542. Synchronous pulley one; 543. Transmission seat; 544. Transmission shaft one; 545. Transmission shaft two; 546. Synchronous pulley two; 547. Transmission component; 5471. Turntable; 5472. Pin; 5473. Tooth groove; 6. Guide slide assembly; 61. First support frame; 62. Third angle iron; 63. Limiting guide rail; 631. Relief groove; 632. Slot; 64. First bolt; 65. Profile plate; 651. Inner cavity; 652. Slot protrusion; 66. Spring; 7. Side pressure assembly; 71. Second support frame; 72. Second slider; 73. Second cylinder; 74. Pressure rail. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a plurality of" means two or more, unless otherwise explicitly specified. In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Please see Figures 1-10A rotary positioning device for a skid conveyor system includes a conveyor rail 1 arranged horizontally along the production line direction; a plurality of skid supports 2 are movably arranged at intervals on the conveyor rail 1, and the skid supports 2 adopt a step-type conveying method. A carrier 3 is rotatably mounted on each skid support 2, and a rotating spray jig 4 for placing workpieces is mounted on the carrier 3. A docking drive mechanism 5 for driving the carrier 3 to rotate is provided on one side of the conveyor rail 1, and clamping mechanisms for laterally clamping and positioning the skid supports 2 are respectively provided at both ends of the conveyor rail 1. In this embodiment, there are two conveyor rails 1, laid parallel to each other on the production line, with the two ends of the conveyor rail 1 being the loading end and the unloading end, respectively; a drive motor and rollers arranged on the conveyor rail 1 are installed at the bottom of each skid support 2, and the drive motor drives the rollers to move along the conveyor rail 1 so that the skid support 2 conveys workpieces along the production line.

[0032] Please see Figure 1 During dust removal operations, the clamping mechanism located at the loading end of the conveying guide rail 1 clamps the carrier 3 on the skid bracket 2, so that the external robot arm can stably place the workpiece onto the rotary spray jig 4. After the workpiece is placed, several skid brackets 2 move forward sequentially along the axial direction of the conveying guide rail 1. When each skid bracket 2 reaches the position of the docking drive mechanism 5, the docking drive mechanism 5 will complete the transmission docking with the carrier 3 on the skid bracket 2 and drive the carrier 3 to rotate, so that the external dry ice / electrostatic dust removal device can perform all-round uniform dust removal on the workpiece on the rotary spray jig 4. After the dust removal is completed, the docking drive mechanism 5 disconnects from the carrier 3, and the skid bracket 2 continues to move along the axial direction of the conveying guide rail 1. The carrier 3 moves forward to the unloading end of the conveyor rail 1 so that it is clamped in the preset position by the clamping mechanism. After the carrier 3 is stable, the workpiece can be quickly and accurately removed from the rotating spray jig 4. During the dust removal process of the workpiece, since the docking drive mechanism 5 only rotates the carrier 3 that has reached its position, the workpiece picking and placing process on the skid bracket 2 at the loading and unloading ends of the conveyor rail 1 is not affected. That is, dust removal and workpiece picking and placing can be carried out at the same time, which greatly improves production efficiency. No manual intervention is required throughout the process, and the degree of automation is high. There is no need to set up multiple sets of motors and transmission modules. All carriers 3 can be driven to rotate sequentially by a single docking drive mechanism 5, resulting in low equipment investment costs.

[0033] The docking drive mechanism 5 and the clamping mechanism are equipped with photoelectric sensors for detecting the position of the skid bracket 2 and intercepting cylinders for stopping the skid bracket 2.

[0034] Please see Figures 2-3The carrier 3 includes a fixed base 31, a rotating shaft 32, and a driven sprocket 33. The fixed base 31 is mounted on the skid bracket 2. The bottom end of the rotating shaft 32 is rotatably mounted on the fixed base 31 via a bearing. The driven sprocket 33 is fixedly sleeved on the rotating shaft 32. The rotating spray fixture 4 is connected to the top end of the rotating shaft 32. The outer circumferential surface of the rotating shaft 32 has a protruding shaft protrusion for supporting the driven sprocket 33. The top surface of the driven sprocket 33 is provided with a plurality of circumferentially distributed positioning pins 34 and guide wheels 35. The guide wheels 35 are located on the outer circumferential side of the positioning pins 34. In this embodiment, the positioning pins 34 are used to position and fix the rotating spray fixture 4 to prevent the rotating spray fixture 4 from shifting during rotation. The guide wheels 35 are used to guide the driven sprocket 33 to rotate and be clamped by the clamping mechanism.

[0035] Please see Figures 2-3 The rotary spraying fixture 4 includes a base plate 41, a support shaft 42, and a material frame 43. The base plate 41 is fixed to the top surface of the driven sprocket 33, the support shaft 42 is erected on the base plate 41, and the material frame 43 is connected to the top of the support shaft 42. In this embodiment, the material frame 43 is annular, and its bottom end is connected to the support shaft 42 through several horizontally arranged connecting rods.

[0036] Please see Figure 3 The base plate 41 has several circumferentially distributed positioning holes 411 for the positioning pin 34 to pass through upwards. The bottom surface of the support shaft 42 has an insertion hole 421 along its axial direction. The center hole 412 through the top and bottom surfaces of the base plate 41 is provided in the middle of the base plate 41. The top end of the rotating shaft 32 passes through the center hole 412 and the insertion hole 421 and is inserted into the bottom end of the support shaft 42. By setting the insertion hole 421 and the center hole 412, the support shaft 42 and the rotating shaft 32 can be quickly connected, which facilitates disassembly and replacement of different specifications of rotary spray jigs 4 and improves versatility. The cooperation between the positioning hole 411 and the positioning pin 34 can realize the quick positioning of the base plate 41 and the driven sprocket 33, which also helps to quickly disassemble and assemble the rotary spray jig 4.

[0037] Please see Figures 4-7 The docking drive mechanism 5 includes a square tube frame 51, a moving platform 52, a translation drive assembly 53, and a sprocket drive assembly 54. The square tube frame 51 is arranged outside the conveying guide rail 1. The moving platform 52 is movably mounted on the top of the square tube frame 51. The translation drive assembly 53 is arranged on the square tube frame 51 and is used to drive the moving platform 52 to move towards the carrier 3. The sprocket drive assembly 54 is mounted on one end of the moving platform 52. In this embodiment, the moving direction of the moving platform 52 is perpendicular to the moving direction of the skid bracket 2. When the moving platform 52 moves close to the carrier 3, the sprocket drive assembly 54 docks with the driven sprocket 33 of the carrier 3, thereby driving the driven sprocket 33 to rotate, so as to realize the rotation of the rotating spray jig 4, which facilitates all-round dust removal of the workpiece.

[0038] Please see Figure 4 The translation drive assembly 53 includes at least two linear guide rails 531 and a first cylinder 532. The two linear guide rails 531 are arranged parallel to each other on the square tube frame 51. The bottom of the moving platform 52 is provided with a first slider 533 movably sleeved on the two linear guide rails 531. The piston rod of the first cylinder 532 is connected to the moving platform 52 and is used to drive the moving platform 52 to move toward the carrier 3. The top of the square tube frame 51 is connected to an upwardly extending mounting plate. The end of the first cylinder 532 away from the moving platform 52 is hinged to the mounting plate. The top surface of the moving platform 52 is fixed with an adjusting plate connected to the piston rod of the first cylinder 532.

[0039] Please see Figure 6 In this embodiment, a downwardly extending positioning angle iron 534 is fixed to the bottom surface of the moving platform 52, and an anti-collision rubber block 535 is sleeved on the outer circumference of the linear guide rail 531 to restrict the forward movement of the positioning angle iron 534. The anti-collision rubber block 535 serves to position the moving platform 52 so that the sprocket drive assembly 54 on the moving platform 52 can accurately align with the driven sprocket 33 of the carrier 3, and can also buffer impacts. In this embodiment, a second positioning angle iron 536 is also provided on the square tube frame 51 located below the linear guide rail 531. The second positioning angle iron 536 is used to position the first slider 533, so as to cooperate with the second positioning angle iron 536 to position the moving platform 52 more accurately.

[0040] Please see Figure 4 as well as Figures 6-7 The sprocket drive assembly 54 includes a synchronous motor 541, a first synchronous pulley 542, a transmission base 543, a first transmission shaft 544, a second transmission shaft 545, a second synchronous pulley 546, and a transmission component 547. The synchronous motor 541 and the transmission base 543 are both horizontally mounted on the top surface of the moving platform 52. The first synchronous pulley 542 is mounted on the output shaft of the synchronous motor 541. The first transmission shaft 544 and the second transmission shaft 545 are both rotatably mounted on the transmission base 543 and are perpendicular to each other. The first transmission shaft 544 and the second transmission shaft 545 are connected by a worm gear structure. In this embodiment, the worm gear structure adopts existing mature technology, and its structure will not be described in detail here. One end of the drive shaft 544 extends horizontally to the outside of the drive seat 543 and the timing pulley 546 is mounted on its extended end. The timing pulley 546 and the timing pulley 542 are wound with a conveyor belt. One end of the drive shaft 545 extends vertically to the bottom of the drive seat 543 and the transmission component 547 is connected to its extended end.

[0041] Please see Figure 3 as well as Figure 5The transmission component 547 includes a turntable 5471 and pins 5472. The extension end of the transmission shaft 545 is connected to two turntables 5471. A plurality of pins 5472 are circumferentially mounted between the two turntables 5471. A plurality of pins 5472 are arranged on the edge of the turntables 5471. A tooth groove 5473 is formed between two adjacent pins 5472 to mesh with the teeth of the driven sprocket 33. Both turntables 5471 are provided with circumferentially distributed through holes. Each pin 5472 has a threaded end that passes through the through hole at both ends, and a welding nut is connected to the threaded end. When the pin 5472 is fitted on the turntable 5471, the pin 5472 is first positioned by the welding nut, and then the pin 5472 and the welding nut are welded to the turntable 5471 to make the connection between the pin 5472 and the turntable 5471 more stable, thereby improving the smoothness of the transmission between the pin 5472 and the driven sprocket 33.

[0042] Please see Figures 1-3 To achieve the rotation of the rotary spray jig 4, the first cylinder 532 drives the sprocket drive assembly 54 on the moving table 52 to move toward the carrier 3 until the tooth groove 5473 between the pins 5472 meshes with the teeth of the driven sprocket 33; then the synchronous motor 541 starts, driving the synchronous pulley 546 and the drive shaft 544 to rotate through the first synchronous pulley 542, so that the first drive shaft 544 synchronously drives the second drive shaft 545 and the turntable 5471 to rotate. Under the drive of the turntable 5471, the pins 5472 drive the driven sprocket 33 to rotate around its axis; under the drive of the driven sprocket 33, the rotary spray jig 4 achieves rotation, so that the workpieces on its material frame 43 are uniformly dusted.

[0043] It is understood that the rotary positioning device for the skid conveying system of the present invention can also be used in application scenarios such as spraying.

[0044] Please see Figures 8-10 The clamping mechanism includes a guide slide assembly 6 arranged on one outer side of the conveying guide rail 1 and a side pressure assembly 7 arranged on the other outer side of the conveying guide rail 1. The guide slide assembly 6 includes a first support frame 61, a third angle iron 62 and a limiting guide rail 63. One end of the first support frame 61 extends toward the outer periphery of the driven sprocket 33. The third angle iron 62 is connected to the extended end of the first support frame 61. The limiting guide rail 63 is mounted on the third angle iron 62 and fits against the outer wheel surface of the guide wheel 35, thereby positioning and guiding the guide wheel 35 to roll.

[0045] Please see Figure 9The guide slide assembly 6 includes a first bolt 64, a profile plate 65, and a spring 66. The shank of the first bolt 64 is connected to the third angle iron 62 by at least one nut. The profile plate 65 has a hollow inner cavity 651 formed along its axial direction. The side wall of the profile plate 65 has a clamping hole for the shank of the first bolt 64 to pass through. The head of the first bolt 64 is attached to the wall of the inner cavity 651. The spring 66 is sleeved on the shank of the first bolt 64. One end of the spring 66 abuts against the third angle iron 62, and the other end presses against the side wall of the profile plate 65. The limiting guide rail 63 is installed on the profile plate 65. In this embodiment, the spring 66 plays a buffering role to prevent the limiting guide rail 63 from jamming the guide wheel 35.

[0046] The mold plate 65 has a pair of opposing locking protrusions 652 at the end away from the first bolt 64. The side wall of the limiting guide rail 63 has a relief groove 631. The top and bottom walls of the relief groove 631 are respectively provided with slots 632 for the locking protrusions 652 to be engaged. Through the cooperation of the locking protrusions 652 and the slots 632, the limiting guide rail 63 can be stably installed on the mold plate 65 and is not easy to fall off.

[0047] Please see Figure 10 The side-pressure assembly 7 includes a second support frame 71, a second slider 72, a second cylinder 73, and a pressure rail 74. The second support frame 71 is disposed opposite to the first support frame 61, with one end of the second support frame 71 extending towards the outer periphery of the driven sprocket 33. The second slider 72 is movably disposed on the second support frame 71. The piston rod of the second cylinder 73 is connected to the second slider 72, and the pressure rail 74 is mounted on the second slider 72. In this embodiment, L-shaped connecting plates are connected to both ends of the slider, one of which is connected to the piston rod of the cylinder, and the other is connected to the pressure rail 74.

[0048] Please see Figure 8 The limiting guide rail 63 and the pressure rail 74 form a material conveying channel for the skid bracket 2 to pass through. When the carrier 3 and the rotary spray jig 4 on the skid bracket 2 arrive in the material conveying channel, the second cylinder 73 drives the second slider 72 and the pressure rail 74 to move toward the guide wheel 35 until the pressure rail 74 presses against the guide wheel 35 to stop the guide wheel 35 and the driven sprocket 33, so that the driven sprocket 33 and the rotary spray jig 4 on it stop rotating. This prevents the rotary spray jig 4 from rotating during the part picking process, which would cause the workpiece to be unable to be accurately placed in the preset position of the rotary spray jig 4. This ensures that the workpiece is picked up and placed more accurately, without the need for frequent positioning or manual assistance. This also helps to improve the workpiece picking and placing efficiency.

[0049] The working principle of the rotary positioning device for the skid conveying system of the present invention is as follows: When the skid support 2 is at the loading end of the conveying guide rail 1, the second cylinder 73 drives the pressure rail 74 to press the guide wheel 35 of the carrier 3, so that the entire carrier 3 and the rotary spraying fixture 4 are stable and stationary; after the workpiece is placed on the material frame 43 of the rotary spraying fixture 4, the pressure rail 74 releases the guide wheel 35, and the skid support 2 moves forward along the conveying guide rail 1 (e.g., ...). Figure 1 (Arrow direction); such as Figures 1-2 When the skid bracket 2 reaches the docking drive mechanism 5 position, the first cylinder 532 drives the moving platform 52 to move toward the carrier 3 until the tooth groove 5473 between adjacent pins 5472 engages with the teeth of the driven sprocket 33; see reference Figure 3 as well as Figure 6 Synchronous motor 541 drives synchronous pulley 546 and drive shaft 544 to rotate via synchronous pulley 542. Drive shaft 544 synchronously drives drive shaft 545 and turntable 5471 to rotate. Driven by turntable 5471, pin 5472 drives driven sprocket 33 to rotate around its axis, realizing the rotation of carrier 3 and the rotating spray jig 4 on it, so that the workpiece on the material frame 43 of the rotating spray jig 4 is uniformly dusted or sprayed. After dusting or spraying is completed, synchronous motor 541 stops driving, and first cylinder 532 drives moving table 52 away from carrier 3, so that pin 5472 disengages from driven sprocket 33. Then, skid bracket 2 continues to move forward along conveyor rail 1 to the clamping mechanism located at the unloading end of conveyor rail 1. Please refer to Figure 1 as well as Figure 8 The second cylinder 73 drives the pressure rail 74 to press the guide wheel 35 of the carrier 3, so that the entire carrier 3 and the rotary spray jig 4 are stable and stationary. After the carrier 3 is stable, the workpiece can be removed from the rotary spray jig 4.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary positioning device for a skid conveyor system, comprising a conveyor guide rail (1) arranged horizontally along the production line direction; characterized in that: The conveying guide rail (1) is movably provided with a number of spaced-apart skid brackets (2), and each skid bracket (2) is rotatably provided with a carrier (3). The carrier (3) is provided with a rotating spraying fixture (4) for placing the workpiece. A docking drive mechanism (5) for driving the carrier (3) to rotate is provided on one side of the conveying guide rail (1). Clamping mechanisms for laterally clamping and positioning the skid brackets (2) are provided at both ends of the conveying guide rail (1).

2. The rotary positioning device for the skid conveying system according to claim 1, characterized in that: The carrier (3) includes a fixed base (31), a rotating shaft (32), and a driven sprocket (33). The fixed base (31) is mounted on the skid bracket (2). The bottom end of the rotating shaft (32) is rotatably mounted on the fixed base (31) via a bearing. The driven sprocket (33) is fixedly mounted on the rotating shaft (32). The rotating spray jig (4) is connected to the top end of the rotating shaft (32). The top surface of the driven sprocket (33) is provided with several circumferentially distributed positioning pins (34) and guide wheels (35).

3. The rotary positioning device for the skid conveying system according to claim 2, characterized in that: The rotary spraying fixture (4) includes a base plate (41), a support shaft (42), and a material frame (43). The base plate (41) is fixed on the top surface of the driven sprocket (33), the support shaft (42) is erected on the base plate (41), and the material frame (43) is connected to the top of the support shaft (42).

4. The rotary positioning device for the skid conveying system according to claim 2, characterized in that: The docking drive mechanism (5) includes a square tube frame (51), a moving platform (52), a translation drive assembly (53), and a sprocket drive assembly (54). The square tube frame (51) is arranged outside the conveying guide rail (1). The moving platform (52) is movably arranged at the top of the square tube frame (51). The translation drive assembly (53) is arranged on the square tube frame (51) and is used to drive the moving platform (52) to move toward the carrier (3). The sprocket drive assembly (54) is installed at one end of the moving platform (52).

5. The rotary positioning device for the skid conveying system according to claim 4, characterized in that: The translation drive assembly (53) includes at least two linear guide rails (531) and a first cylinder (532). The two linear guide rails (531) are arranged in parallel on the square tube frame (51). The bottom of the moving stage (52) is provided with a first slider (533) that is movably sleeved on the two linear guide rails (531). The piston rod of the first cylinder (532) is connected to the moving stage (52).

6. The rotary positioning device for a skid conveying system according to claim 5, characterized in that: The sprocket drive assembly (54) includes a synchronous motor (541), a first synchronous pulley (542), a transmission base (543), a first transmission shaft (544), a second transmission shaft (545), a second synchronous pulley (546), and a transmission component (547). The synchronous motor (541) and the transmission base (543) are both horizontally mounted on the top surface of the moving platform (52). The first synchronous pulley (542) is mounted on the output shaft of the synchronous motor (541). The first transmission shaft (544) and the second transmission shaft (545) are both rotatably mounted on the transmission base. (543) and perpendicular to each other, the first drive shaft (544) and the second drive shaft (545) are connected by a worm gear structure; one end of the first drive shaft (544) extends horizontally to the outside of the drive seat (543) and the second synchronous pulley (546) is installed at its extended end; the second synchronous pulley (546) and the first synchronous pulley (542) are wound with a conveyor belt; one end of the second drive shaft (545) extends vertically to the bottom of the drive seat (543) and the transmission component (547) is connected at its extended end.

7. The rotary positioning device for a skid conveying system according to claim 6, characterized in that: The transmission component (547) includes a turntable (5471) and pins (5472). The extension end of the transmission shaft (545) is connected to two turntables (5471). A plurality of pins (5472) are circumferentially mounted between the two turntables (5471). A plurality of pins (5472) are arranged on the edge of the turntable (5471). A tooth groove (5472) is formed between two adjacent pins (5472) to mesh with the teeth of the driven sprocket (33).

8. The rotary positioning device for a skid conveyor system according to any one of claims 2-7, characterized in that: The clamping mechanism includes a guide slide assembly (6) arranged on one outer side of the conveying guide rail (1) and a side pressure assembly (7) arranged on the other outer side of the conveying guide rail (1). The guide slide assembly (6) includes a first support frame (61), a third angle iron (62) and a limiting guide rail (63). One end of the first support frame (61) extends toward the outer periphery of the driven sprocket (33). The third angle iron (62) is connected to the extended end of the first support frame (61). The limiting guide rail (63) is mounted on the third angle iron (62) and fits against the outer wheel surface of the guide wheel (35).

9. The rotary positioning device for a skid conveying system according to claim 8, characterized in that: The guide slide assembly (6) includes a first bolt (64), a profile plate (65), and a spring (66). The shank of the first bolt (64) is connected to the third angle iron (62) by at least one nut. The profile plate (65) has a hollow inner cavity (651) formed along its axial direction. The side wall of the profile plate (65) has a clamping hole for the shank of the first bolt (64) to pass through. The head of the first bolt (64) is attached to the wall of the inner cavity (651). The spring (66) is sleeved on the shank of the first bolt (64). One end of the spring (66) abuts against the third angle iron (62), and the other end presses against the side wall of the profile plate (65). The limiting guide rail (63) is installed on the profile plate (65).

10. The rotary positioning device for a skid conveying system according to claim 8, characterized in that: The side pressure assembly (7) includes a second support frame (71), a second slider (72), a second cylinder (73), and a pressure rail (74). One end of the second support frame (71) extends toward the outer periphery of the driven sprocket (33). The second slider (72) is movably mounted on the second support frame (71). The piston rod of the second cylinder (73) is connected to the second slider (72). The pressure rail (74) is mounted on the second slider (72).

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