A spraying device for automobile interior decoration parts

Abstract

The invention relates to the technical field of spraying processing of automobile interior decoration parts, and discloses a spraying device for automobile interior decoration parts, comprising a spraying room, a loading station, a spraying station, a feeding tray, a placing table and a driving structure. A spray head and a moving structure for controlling the movement of the spray head are arranged in the spraying room, the moving structure comprises a screw rod and a guide block, the spray head is arranged on the guide block, the driving structure comprises a driven shaft, a driving shaft plugged with the driven shaft and a motor for driving the driving shaft to rotate, a switching structure is arranged between the screw rod, the driving shaft and the driven shaft, the switching structure comprises a locking block telescopically arranged on the driving shaft, a control structure for controlling the extension and retraction of the locking block, and a transmission structure which can simultaneously drive the spray head to spray liquid and the screw rod to rotate when the locking block retracts, or can simultaneously control the spray head to stop spraying liquid and the screw rod to stop rotating when the locking block extends outward, the spraying device can control the transmission of the workpiece and the movement and spraying of the spray head by only one motor, thereby increasing the linkage.

Description

Technical Field

[0001] The invention relates to the technical field of spraying processing of automobile interior decoration parts, and in particular to a spraying device for automobile interior decoration parts. Background Art

[0002] When processing automobile interior parts, a protective layer can be directly formed by spraying paint on the surface, or a protective layer can be pasted after spraying glue on the surface. The above method can not only extend the service life of automobile interior parts, but also improve their aesthetics and make them match the overall decoration of the car.

[0003] A Chinese patent with application number CN202111117710.9 discloses a spraying device for an automobile interior storage box, comprising a spraying robot, the spraying robot having a spraying end, and the parts to be sprayed can rotate on a rotating plate with its end to the bottom of the spraying end of the spraying robot; it also comprises a frame, a rotating plate and a rotating drive mechanism, the rotating drive mechanism is arranged on the frame to drive the rotating plate to rotate; and a placing table, which is arranged on the upper side of the end of the rotating plate and for placing the parts to be sprayed, and also comprises a spraying room, the spraying room having a spraying space and an opening, the spraying robot is fixed in the spraying space, and the end of the rotating plate can rotate into the spraying space through the opening.

[0004] In this scheme, after the workpiece to be sprayed (workpiece) is placed on the placement table, the rotary drive mechanism drives the rotating plate (feeding tray) to rotate the placement table with the workpiece to be sprayed from the outside of the spraying space to the bottom of the spraying end (spray head), and then the spraying robot controls the movement of the spraying end to spray the workpiece to be sprayed. However, in the above scheme, the transmission of the workpiece and the movement of the spray head are controlled by different drive components, and the linkage is poor, which leaves room for improvement. Summary of the invention

[0005] The present invention aims to provide a spraying device for automobile interior decoration parts in view of the disadvantages in the prior art that the transmission of the workpiece and the movement of the spray head are respectively controlled by different driving components, the linkage is poor and there is room for improvement.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] A spraying device for automobile interior parts, comprising a spraying room with an opening on the side, a loading station arranged outside the spraying room, a spraying station arranged in the spraying room, and a conveying structure for conveying workpieces from the loading station to the spraying station, the conveying structure comprising a feeding tray rotatably arranged on the spraying room, a placing table for storing workpieces arranged on the feeding tray, and a driving structure for driving the feeding tray to rotate, a spray head is reciprocatingly arranged above the spraying station in the spraying room and sprays the workpieces on the spraying station when moving, and the movement of the spray head is controlled by the moving structure;

[0008] The moving structure includes a screw rod rotatably arranged in the spray room and a guide block which is threadably matched with the screw rod and linearly slidably matched with the guide of the spray room, and the spray head is arranged on the guide block;

[0009] The driving structure includes a driven shaft fixed concentrically with the feeding tray and rotatably connected to the spray booth, a driving shaft plugged into an end of the driven shaft away from the feeding tray, and a motor driving the driving shaft to rotate;

[0010] The switching structure is arranged between the screw, the driving shaft and the driven shaft. When the placement table is transferred to the spraying station, the driving shaft and the screw are driven to rotate at the same time and the driven shaft is controlled to be stationary. After the spraying is completed and before the placement table is rotated to the spraying station again, the driving shaft and the driven shaft are driven to rotate at the same time and the screw is controlled to be stationary.

[0011] With the above scheme, after the workpiece is placed on the placement table located on the loading station, the motor drives the driving shaft to rotate. At this time, the switching structure drives the driven shaft and the driving shaft to rotate synchronously, driving the feeding tray to rotate the placement table with the workpiece to the spraying station. During the above process, the screw does not rotate, so the nozzle does not move. After the workpiece is located on the spraying station, the switching structure switches to the driving shaft and the screw to rotate simultaneously, and the driven shaft does not rotate. Therefore, the driven shaft and the feeding tray no longer rotate. The screw rotation drives the nozzle to move to spray the workpiece on the spraying station, and the screw can be controlled by the motor to continuously change the direction of the driving shaft to achieve the reversal of the screw. The nozzle reciprocates to spray the workpiece multiple times to ensure the spraying quality. After multiple reciprocating movements, the nozzle returns to the initial position to complete the spraying. The switching structure drives the driven shaft and the driving shaft to rotate synchronously, and the screw stops rotating at the same time, that is, the nozzle stops moving. The feeding tray and the driven shaft rotate synchronously with the driving shaft to rotate the sprayed workpiece from the spraying station to the loading station for unloading. The transmission of the workpiece and the movement of the nozzle can be controlled by one motor, which increases the linkage.

[0012] Preferably, the switching structure includes a locking block elastically and telescopically arranged on the outer ring wall of the driving shaft, which is plugged into the driven shaft when partially extended and disengaged from the driven shaft after retracting. A control structure is arranged between the locking block and the spray room, which controls the retraction of the locking block when the placement table is transferred to the spraying station and drives the locking block to partially extend after spraying is completed. A transmission structure is arranged between the driving shaft and the nozzle, which drives the nozzle to spray liquid and drives the screw to rotate at the same time when the locking block retracts to the maximum stroke, or controls the nozzle to stop spraying liquid and stop rotating at the same time when the locking block extends outward.

[0013] With the above scheme, when the feed tray rotates to the placement table at the spraying station, the control structure controls the locking block to retract to disengage from the driven shaft, and the driven shaft and the feed tray no longer rotate. At the same time, after the locking block retracts to the maximum stroke, the transmission structure can be controlled to drive the nozzle to spray liquid, and at the same time, the screw rod is driven to rotate to drive the nozzle to move and spray the workpiece on the spraying station. After the nozzle moves back and forth several times, it returns to the initial position to complete the spraying. The control structure drives the locking block to extend outward, controls the transmission structure to drive the nozzle to stop spraying liquid, and drives the screw rod to stop rotating, that is, the nozzle stops spraying liquid and stops moving. After the motor drives the drive shaft to rotate until the locking block and the driven shaft are plugged and matched, the feed tray and the driven shaft rotate synchronously with the drive shaft to rotate the sprayed workpiece from the spraying station to the loading station for unloading, and after loading again at the loading station, the placement table with the workpiece is rotated to the spraying station. The transmission of the workpiece and the movement and spraying of the nozzle can be controlled by one motor, further increasing the linkage.

[0014] Preferably, the control structure includes a limiting structure arranged in the spraying room, which limits the rotation of the feed tray when the placement table is rotated to the spraying station and releases the limit on the feed tray after spraying is completed; the locking block is provided with an extrusion inclined surface for driving the locking block to retract when the driven shaft is stationary and the driving shaft rotates; the driving shaft is provided with an adsorption structure for driving the locking block to further retract to the maximum stroke and limit the position after the locking block retracts and releases the limit on the locking block after spraying is completed; a second spring is provided between the driving shaft and the locking block for driving the locking block to partially extend when the adsorption structure releases the limit on the locking block.

[0015] By adopting the above scheme, in order to ensure the smooth rotation of the driven shaft and the feed tray, the rotation resistance of the driven shaft is generally small. Therefore, when the driving shaft drives the driven shaft and the feed tray to rotate to the spraying station and the locking block retracts and disengages from the driven shaft, the driven shaft will still rotate due to inertia, resulting in deviation of the workpiece position, which increases the defective rate of spraying. Therefore, a limiting structure is set. When the workpiece rotates to the spraying station, the limiting structure first limits the rotation of the feed tray. At this time, the driven shaft does not rotate but the driving shaft is still rotating. Therefore, the extrusion bevel and the extrusion sliding of the driven shaft cooperate to drive the locking block to retract and disengage from the driven shaft, and further retract and limit under the action of the adsorption structure, to ensure that the locking block will not extend outward during the subsequent motor driving the screw to rotate forward and reverse for multiple spraying processes. When spraying is completed, the limiting structure releases the rotation limit on the feed tray, and the adsorption structure releases the limit on the locking block. The locking block extends outward under the action of the second spring, and after the driving shaft rotates to a suitable position, the locking block is plugged into the driven shaft again to achieve simultaneous rotation of the driving shaft and the feed tray.

[0016] Preferably, the limiting structure includes a positioning plate protruding from the bottom of the feed tray below the placing table, a positioning plate that is raised and lowered at the spraying station in the spraying room and can be rotated when rising, which abuts against a limiting plate to limit the rotation of the feed tray and releases the limiting of the positioning plate when descending, and a lifting structure that controls the lifting and lowering of the limiting plate.

[0017] By adopting the above scheme, before the workpiece rotates to the spraying station, the lifting structure controls the limit plate to rise, and after the positioning plate rotates with the feeding tray until it abuts against the limit plate, the positioning plate and the feeding tray no longer rotate, and the workpiece is located on the spraying station; when the spraying is completed, the lifting structure controls the limit plate to descend, and the resistance from the limit plate on the positioning plate disappears, and the feeding tray can continue to rotate to move the workpiece away from the spraying station.

[0018] Preferably, the lifting structure includes a first electromagnet arranged in the spray room for controlling the limit plate to descend when energized, and a first spring arranged between the spray room and the limit plate for driving the limit plate to rise when the first electromagnet loses power. A first sensor component electrically connected to the first electromagnet is arranged in the spray room and drives the first electromagnet to lose power when sensing a workpiece passing through it, and a second sensor component electrically connected to the first electromagnet drives the first electromagnet to be energized when sensing that the guide block touches it to reach the target number of times to complete spraying.

[0019] With the above solution, before the workpiece rotates to the spraying station, the first sensor component senses the workpiece passing by, drives the first electromagnet to lose power, and the limit plate rises under the action of the first spring. When the nozzle moves back and forth for spraying, the second sensor component will continuously touch the guide block. When the second sensor component senses that the guide block touches it to reach the target number of times to complete the spraying, the first electromagnet is energized, and the limit plate descends under the magnetic attraction of the first electromagnet, releasing the limit on the positioning plate, and at the same time squeezes the first spring to drive it to deform and generate a reset elastic force.

[0020] Preferably, the adsorption structure includes a second electromagnet which is energized and arranged in the driving shaft and drives the locking block to continue to retract to the maximum stroke and limit the position when the locking block retracts. When the second electromagnet loses power, the adsorption limit on the locking block is released. The second electromagnet is electrically connected to the first sensor component and the second sensor component. When the workpiece passes through the first sensor component, the second electromagnet is energized; when the second sensor component senses that the guide block has reached the target number of times to complete spraying, the second electromagnet loses power.

[0021] With the above solution, before the workpiece rotates to the spraying station, the first sensor component senses the passage of the workpiece and drives the second electromagnet to be energized. However, at this time, due to the long distance between the second electromagnet and the locking block, the magnetic force of the second electromagnet is not enough to drive the locking block to retract, so the locking block is still plugged with the driven shaft to drive the driving shaft and the driven shaft to rotate at the same time. Until the workpiece rotates to the spraying station, the driven shaft stops rotating and the driving shaft is still rotating, the locking block is driven by the extrusion ramp to retract and disengage from the driven shaft. The retraction of the locking block shortens the distance between the second electromagnet and the locking block, so that the magnetic force of the second electromagnet can drive the locking block to retract further until it fits with the second electromagnet. This is the maximum retraction stroke of the locking block, and the second spring is squeezed and deformed to generate a reset elastic force. When the nozzle moves back and forth for spraying, the second sensing component senses that the guide block touches it to reach the target number of times to complete the spraying, causing the second electromagnet to lose power. The locking block extends outward under the action of the second spring and disengages from the second electromagnet, and continues to extend outward during the rotation of the drive shaft until it is plugged into the driven shaft.

[0022] Preferably, the transmission structure includes a rotating shaft arranged on the spray room and rotating simultaneously with the driving shaft and having one end coaxially plugged with the screw, a connecting structure arranged between the rotating shaft and the screw so that the two rotate simultaneously or the rotating shaft rotates relative to the screw, a control pump connected to the nozzle and capable of controlling its liquid spraying, and a touch switch arranged in the driving shaft and connected to the control pump and the connecting structure; when the locking block retracts to its maximum stroke, it touches the touch switch to drive the control pump to control the nozzle to spray liquid and drive the rotating shaft and the screw to rotate simultaneously; when the locking block extends outward, it disengages from the touch switch to drive the control pump to control the nozzle to stop spraying liquid and drive the rotating shaft to rotate relative to the screw.

[0023] With the above solution, the rotating shaft and the driving shaft always rotate together. When the locking block retracts to the maximum stroke, it touches the touch switch. After the touch switch is touched, the control pump is driven to pump the liquid to the nozzle for spraying, and at the same time, the connection structure is controlled to drive the rotating shaft and the screw rod to rotate simultaneously; when the locking block extends outward, the locking block is disengaged from the touch switch. After the touch switch and the locking block are no longer in contact, the control pump is driven to stop pumping liquid, that is, the nozzle is controlled to stop spraying liquid, and at the same time, the connection structure is controlled to drive the rotating shaft and the screw rod to disengage, that is, the screw rod is stationary and the rotating shaft rotates relative to the screw rod.

[0024] Preferably, the connecting structure includes a non-circular plug-in block which is partially telescopically arranged at the end of the screw rod along its own axial direction, a slot which is recessed at the end of the rotating shaft and is adapted to the plug-in block, and a third electromagnet which is arranged at the bottom of the slot and is electrically connected to the touch switch and drives the plug-in block to be partially extended and inserted into the slot when energized, and a tension spring is arranged between the screw rod and the plug-in block, which drives the plug-in block to retract and disengage from the slot when the third electromagnet loses power.

[0025] With the above solution, the locking block retracts to the maximum stroke and touches the touch switch. After the touch switch is touched, the third electromagnet is driven to be energized to generate magnetic force. The plug block has a tendency to be inserted into the slot under the magnetic attraction of the third electromagnet. Since the plug block and the slot are not circular, the shaft needs to be rotated until the slot and the plug block are fully adapted and aligned, and then the plug block can be inserted into the slot. The non-circular setting allows the shaft to drive the lead screw to rotate through the plug block. At this time, the tension spring is stretched and deformed to generate a reset elastic force. After the locking block extends outward and disengages from the touch switch, the touch switch drives the third electromagnet to lose power, and the plug block retracts to disengage from the slot under the action of the tension spring, and the lead screw no longer rotates with the shaft.

[0026] Preferably, a gear set is provided between the rotating shaft and the driving shaft to enable both to rotate simultaneously, and the gear set includes a driving gear concentrically fixed on the driving shaft, a driven gear concentrically fixed on the rotating shaft, and a gear transmission assembly rotatably arranged in the spray room and respectively meshing with the driving gear and the driven gear to realize simultaneous rotation of the driving shaft and the rotating shaft.

[0027] By adopting the above scheme, the driving shaft and the driving gear rotate synchronously, the driving gear drives the driven gear to rotate through the gear transmission assembly, and the driven gear and the rotating shaft rotate synchronously, thereby ensuring that the rotating shaft and the driving shaft always rotate together, and the rotating shaft also reverses when the driving shaft reverses rotation.

[0028] Preferably, the spray room is provided with a liquid storage barrel connected to the spray head through a control pump, and a stirring structure is provided in the liquid storage barrel. The stirring structure includes a rotatable stirring shaft and stirring blades arranged on the stirring shaft, and a transmission gear meshing with the driving gear is concentrically fixed on the stirring shaft.

[0029] With the above solution, the paint or glue sprayed on the car interior parts is generally a liquid formed by mixing multiple components. There is a risk of stratification after long-term static. Therefore, it is necessary to stir the liquid in the liquid storage barrel through a stirring structure before spraying to make it uniform and reduce the defective rate. The common way is to set a driving component to drive the stirring structure to stir, but the common setting method will lead to an increase in driving components and reduce the linkage, which does not conform to the original concept of increasing linkage of this solution. Therefore, the rotation of the stirring structure is also controlled by the motor, that is, the transmission of the workpiece, the movement and spraying of the nozzle, and the stirring of the liquid in the liquid storage barrel can be controlled by one motor to increase the linkage.

[0030] The transmission gear and the stirring shaft rotate synchronously. The rotation of the driving gear drives the stirring shaft to rotate through the transmission gear, driving the stirring blades to rotate for stirring. The continuous reversal of the driving shaft can also drive the stirring shaft to continuously reverse its rotation, further increasing the uniformity of stirring.

[0031] The present invention has significant technical effects due to the adoption of the above technical scheme: it only needs to turn on the motor to drive the driving shaft to rotate, thereby driving the stirring shaft and the rotating shaft to rotate at the same time. At this time, under the connection of the locking block, the feeding plate also starts to rotate, and the first sensing component senses the passage of the workpiece and drives the first electromagnet to lose power and the second electromagnet to be energized. The feeding plate rotates to transfer the workpiece to the spraying station and stops rotating under the action of the limit plate. The driving shaft continues to rotate and drives the locking block to retract through the extrusion ramp, and retracts under the magnetic attraction of the first electromagnet and is limited to the maximum stroke. At this time, the touch switch touches the locking block to drive the third electromagnet to be energized and control the pump to start pumping liquid. The third electromagnet drives the non-circular plug-in block to be connected with the slot to realize the simultaneous rotation of the rotating shaft and the screw rod, thereby driving the liquid spraying nozzle to move. After the second sensing component senses that the guide block has touched it to reach the target number of times to complete the spraying, it drives the first electromagnet to be energized and the second electromagnet to be de-energized, the limit plate retracts to release the limit, the locking block extends and disengages from the touch switch and then plugs into the driven shaft, and after the third electromagnet loses power, the plug retracts and disengages from the slot and the nozzle stops spraying liquid, and the drive shaft rotates to drive the feed tray to rotate and transfer the workpiece to the loading station for unloading. The transmission of the workpiece, the movement and spraying of the nozzle, and the stirring of the liquid in the liquid storage barrel can be controlled by one motor, which increases the linkage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of a spraying device for automobile interior decoration parts in an embodiment;

[0033] Figure 2 It is a front view of a spraying device for automobile interior parts in an embodiment when a placing table is rotated to a spraying station and a locking block is not retracted;

[0034] Figure 3 yes Figure 2 Sectional view at AA in the figure;

[0035] Figure 4 yes Figure 3 The enlarged view of point C in the figure;

[0036] Figure 5 yes Figure 3 The enlarged view of point D in the figure;

[0037] Figure 6 is a half-section schematic diagram of a spray head during spraying in a spraying device for an automobile interior decoration part in an embodiment;

[0038] Figure 7 yes Figure 6 The enlarged view of point E in the figure;

[0039] Figure 8 yes Figure 6 The enlarged view of F in the figure;

[0040] Fig. 9is a half-section schematic diagram of a spraying device for an automobile interior decoration part in an embodiment when spraying is completed;

[0041] Fig.10 yes Figure 2 The cross-sectional view at BB in FIG.

[0042] Fig.11 yes Fig.10 The enlarged view of G in the figure;

[0043] Fig.12 It is a partial enlarged view of a locking block in a spraying device for automobile interior parts in an embodiment when it is retracted and limited to the maximum stroke;

[0044] Fig.13 It is a partial enlarged view of a spraying device for an automobile interior decoration part in an embodiment when the second electromagnet releases the adsorption of the locking block and the locking block is not plugged into the locking groove;

[0045] Fig.14 is a top view of a spraying device for automobile interior decoration parts in an embodiment;

[0046] Fig.15 yes Fig.14 The cross-sectional view at HH in FIG.

[0047] Fig.16 is a disassembled diagram of a spraying device for an automobile interior decoration part in an embodiment;

[0048] Fig.17 yes Fig.16 The enlarged view at position I in FIG.

[0049] Fig.18 yes Fig.16 Enlarged view of point J in FIG.

[0050] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Spraying room; 2. Feeding tray; 3. Placing table; 4. Workpiece; 5. Spray head; 6. Screw rod; 7. Guide block; 8. Guide groove; 9. Second sensing component; 10. Liquid storage barrel; 11. Suction tube; 12. Control pump; 13. Driven shaft; 14. Driving shaft; 15. Motor; 16. Telescopic slot; 17. Locking block; 1701, Extrusion ramp; 18. Locking groove; 19. Second electromagnet; 20; Second spring; 21. Touch switch ; 22. lifting slot; 23. limit plate; 24. first electromagnet; 25. first spring; 26. positioning plate; 27. first sensing component; 28. rotating shaft; 29. ​​groove; 30. sliding slot; 31. plug-in block; 32. tension spring; 33. slot; 34. third electromagnet; 35. gear set; 3501. driving gear; 3502. gear transmission assembly; 3503. driven gear; 36. stirring shaft; 37. stirring blade; 38. transmission gear; 39. fixing block; 40. circular groove. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0052] A spraying device for automobile interior parts, referring to Figures 1 to 18 , including a spray booth 1 with a side opening, a spray station is arranged in the spray booth 1, a loading station is arranged outside the spray booth 1, a driven shaft 13 is rotatably arranged in the spray booth 1, a feeding tray 2 is concentrically fixed on the upper end surface of the driven shaft 13 located in the spray booth 1, and a placing table 3 is fixed on the upper end surface of the feeding tray 2 for placing a workpiece 4. The feeding tray 2 can rotate to transfer the workpiece 4 to be sprayed from the loading station to the spray station in the spray booth 1, and transfer the workpiece 4 after spraying from the spray station to the loading station outside the spray booth 1.

[0053] A spray head 5 is arranged above the spraying station in the spraying room 1. The spray head 5 can reciprocate along the depth direction of the spraying room 1 to spray the workpiece 4 on the spraying station. The movement of the spray head 5 is controlled by a moving structure. The moving structure includes a screw rod 6 that is rotatably arranged above the spraying station in the spraying room 1. The axial direction of the screw rod 6 is the same as the moving direction of the spray head 5. It also includes a guide block 7 that is threadedly matched with the screw rod 6. The spraying room 1 is concavely provided with a guide groove 8 for the guide block 7 to be inserted and move linearly along the depth direction of the spraying room 1. The spray head 5 is fixedly arranged at the bottom of the guide block 7. Sensor devices are respectively arranged on the two side walls of the guide groove 8 along the depth direction of the spraying room 1. A control module connected with the sensor device is arranged in the spraying room. When the guide block 7 moves to fit with any side wall, it is the maximum moving stroke of the guide block 7 and the spray head 5 in this direction. At this time, the signal is transmitted to the control module through the sensor device to control the reversal of the screw rod 6. In this embodiment, both sensors are contact sensors, and the two sensors and control module are prior art, which are not shown in the figure and will not be described here. When the guide block 7 and the guide groove 8 are in contact with the side wall away from the opening of the spray booth 1, the nozzle 5 is in the initial position.

[0054] A liquid storage barrel 10 storing liquid to be sprayed is fixedly arranged in the spray room 1. One end of a liquid suction pipe 11 is connected to the spray head 5 and the other end is inserted below the liquid surface in the liquid storage barrel 10. A control pump 12 is arranged on the liquid suction pipe 11. When the control pump 12 is turned on, the liquid in the liquid storage barrel 10 is pumped to the spray head 5 through the liquid suction pipe 11 for spraying. When the control pump 12 is turned off, the spray head 5 stops spraying liquid.

[0055] A stirring shaft 36 is vertically rotatably arranged in the liquid storage barrel 10, and stirring blades 37 are arranged on the outer ring wall of the stirring shaft 36 in the liquid storage barrel 10. In this embodiment, four stirring blades 37 are evenly spaced around the stirring shaft 36 axially. One end of the stirring shaft 36 is located in the liquid storage barrel 10, and the other end is located below the spraying room 1 after passing through the liquid storage barrel 10 and the spraying room 1. The stirring shaft 36 is rotatably connected to the spraying room 1 and is sealed and rotatably connected to the liquid storage barrel 10. In this embodiment, a fixed block 39 is fixedly arranged on the ground below the spraying room 1, and the end of the stirring shaft 36 located below the spraying room 1 is rotatably connected to the fixed block 39 to ensure the stability of the rotation of the stirring shaft 36.

[0056] A motor 15 is also fixed on the ground below the spray booth 1, and a driving shaft 14 is fixedly arranged on the output shaft of the motor 15. A circular groove 40 is concentrically recessed upward at one end of the driven shaft 13 away from the feeding tray 2, and one end of the driving shaft 14 away from the motor 15 is concentrically inserted into the circular groove 40. That is, the driven shaft 13 and the driving shaft 14 are concentrically plugged and the driving shaft 14 can rotate relative to the driven shaft 13.

[0057] A driving gear 3501 is coaxially fixedly disposed on the driving shaft 14 , and a transmission gear 38 is coaxially fixedly disposed on the stirring shaft 36 . The driving gear 3501 and the transmission gear 38 are meshed, and when the motor 15 drives the driving shaft 14 to rotate, the stirring shaft 36 also rotates simultaneously.

[0058] The outer ring wall of the driving shaft 14 in the circular groove 40 is recessed with a telescopic groove 16, and the inner ring wall of the circular groove 40 is recessed with a locking groove 18. A locking block 17 is telescopically arranged in the telescopic groove 16. When the locking block 17 is partially extended, it can be plugged into the locking groove 18 so that the driven shaft 13 and the driving shaft 14 can rotate at the same time. After the locking block 17 is retracted, it is disengaged from the locking groove 18 so that the driving shaft 14 can rotate relative to the driven shaft 13. The extension and retraction of the locking block 17 is controlled by the control structure. When the placement table 3 is transferred to the spraying station, the control structure controls the locking block 17 to retract and limit it in the telescopic groove 16. A transmission structure is arranged between the driving shaft 14 and the spray head 5. When the locking block 17 is retracted to the maximum stroke, the transmission structure drives the spray head 5 to spray liquid and drives the screw 6 to rotate at the same time, that is, the spray head 5 sprays liquid and moves at the same time to achieve spraying of the workpiece 4. After the workpiece 4 is sprayed, the control structure drives the locking block 17 to partially extend and re-engage with the locking groove 18. After the locking block 17 extends outward, the transmission structure controls the nozzle 5 to stop spraying liquid and controls the screw 6 to stop rotating.

[0059] The control structure includes a limiting structure provided in the spray room 1 to limit the feed tray 2 from continuing to rotate when the placement table 3 rotates to the spray station. After the limiting structure limits the feed tray 2 from rotating, the driven shaft 13 no longer rotates, but the driving shaft 14 is still rotating. Therefore, an extrusion slope 1701 is provided on the locking block 17. When the driving shaft 14 rotates relative to the driven shaft 13, the extrusion slope 1701 and the locking groove 18 are extruded and slidably matched to drive the locking block 17 to retract into the telescopic groove 16 and disengage from the locking groove 18. An adsorption structure is provided in the telescopic groove 16 to drive the locking block 17 to further retract to the maximum stroke after the locking block 17 retracts. The adsorption structure limits the locking block 17 to the maximum stroke, so that the locking block 17 is completely located in the telescopic groove 16 without contacting the driven shaft 13, thereby avoiding the rotation of the driven shaft 13 caused by the forward or reverse rotation of the driving shaft 14 in the subsequent spraying process, thereby avoiding the position deviation of the workpiece 4. When spraying is completed, the limiting structure releases the limit on the feed tray 2, and the adsorption structure releases the adsorption limit on the locking block 17. A second spring 20 is provided between the telescopic slot 16 and the locking block 17, and its two ends are respectively fixedly connected to the two and drive the locking block 17 partially to extend out of the telescopic slot 16 under normal conditions. That is, when the adsorption structure releases the limit on the locking block 17, the second spring 20 drives the locking block 17 to extend outward. Since the telescopic slot 16 and the locking block 17 are not necessarily facing each other at this time, the locking block 17 first moves outward to contact the inner ring wall of the circular groove 40. During the rotation of the driving shaft 14 relative to the driven shaft 13, when it rotates until the telescopic slot 16 and the locking block 17 are facing each other, the locking block 17 continues to extend out and re-engages with the locking slot 18.

[0060] The limiting structure includes a positioning plate 26 protruding from the bottom of the feeding tray 2 below the placing table 3, a lifting groove 22 is recessed at the spraying station in the spraying room 1, a limiting plate 23 is lifted and lowered in the lifting groove 22, a first electromagnet 24 for controlling the limiting plate 23 to descend when powered is provided at the bottom of the lifting groove 22, and a first spring 25 is provided between the lifting groove 22 and the limiting plate 23 with two ends respectively fixedly connected to the two and driving the limiting plate 23 to rise when the first electromagnet 24 loses power.

[0061] The adsorption structure includes a second electromagnet 19 which is set at the bottom of the telescopic slot 16 and drives the locking block 17 to continue to retract to the maximum stroke and limit the position when the locking block 17 retracts into the telescopic slot 16. When the second electromagnet 19 loses power, the adsorption limit on the locking block 17 is released.

[0062] A first sensor component 27 is provided in the spray room 1 in the circumferential direction of the feed tray 2, and a second sensor component 9 is fixedly provided on the side wall of the guide groove 8 away from the opening of the spray room 1. After the first sensor component 27 senses the passage of the workpiece 4, it drives the first electromagnet 24 to lose power and drives the second electromagnet 19 to be energized; when the nozzle 5 moves back and forth for spraying, the second sensor component 9 senses that the guide block 7 touches it to reach the target number of times to complete the spraying, and then the first electromagnet 24 is energized and the second electromagnet 19 is de-energized. In this embodiment, the nozzle 5 moves from the initial position to the opening near the spray room 1 to the maximum movement stroke and then moves to the initial position again after reversing, which is a spraying process. In this embodiment, the first sensor component 27 is a laser sensor and the second sensor component 9 is a contact sensor.

[0063] The transmission structure includes a rotating shaft 28 rotatably arranged on the side wall of the spray booth 1 away from the opening thereof, a driven gear 3503 is coaxially fixedly arranged on the rotating shaft 28, and a gear transmission assembly 3502 is arranged in the spray booth 1, which is respectively meshed with the driving gear 3501 and the driven gear 3503 to realize the simultaneous rotation of the driving shaft 14 and the rotating shaft 28. The gear transmission assembly 3502 is formed by meshing a plurality of gears, and is used for reversing and transmission, which is a prior art and will not be described in detail here.

[0064] The rotating shaft 28 is concentrically arranged with the screw rod 6. The end of the screw rod 6 close to the rotating shaft 28 is concavely provided with a circular groove 29 for the end of the rotating shaft 28 to be concentrically inserted. One end of the rotating shaft 28 is inserted into the groove 29 and can rotate relative to the groove 29. A non-circular sliding groove 30 is concavely arranged at the bottom of the groove 29 along its own axial direction. A non-circular plug-in block 31 adapted to the sliding groove 30 is telescopically arranged in the sliding groove 30. A non-circular slot 33 adapted to the plug-in block 31 is concavely arranged on the end of the rotating shaft 28 inserted into the groove 29. A third electromagnet 34 is arranged at the bottom of the slot 33 to drive the plug-in block 31 to be inserted into the slot 33 when powered. A tension spring 32 is arranged between the sliding groove 30 and the plug-in block 31, and the two ends are respectively fixedly connected to the two and drive the plug-in block 31 to retract and disengage from the slot 33 when the third electromagnet 34 loses power. A touch switch 21 is provided at the bottom of the telescopic slot 16. When the touch switch 21 is touched by the locking block 17, the third electromagnet 34 is energized and the control pump 12 is driven to turn on. When the locking block 17 is separated from the touch switch 21, the third electromagnet 34 is de-energized and the control pump 12 is driven to turn off.

[0065] The two sensor devices, the first sensor component 27, the second sensor component 9, the touch switch 21, the first electromagnet 24, the second electromagnet 19, the third electromagnet 34, the control pump 12 and the motor 15 are all connected to the control module, and the setting of the control module and the signal connection and control procedures between the control module and the above components are all existing technologies and will not be elaborated here.

[0066] When preparing to spray the workpiece 4, the placement table 3 is located on the loading station, and the workpiece 4 is placed on the placement table 3. At this time, the locking block 17 is plugged into the locking groove 18. The motor 15 is turned on by the control module, and the motor 15 drives the driving shaft 14 to rotate in the forward direction. The forward rotation of the driving shaft 14 drives the stirring shaft 36 to rotate to stir the liquid in the liquid storage barrel 10, drives the rotating shaft 28 to rotate, and also drives the driven shaft 13 and the feeding tray 2 to rotate in the forward direction, and transfers the placement table 3 with the workpiece 4 from the loading station to the spraying station. In this process, when the first sensor component 27 detects that the workpiece 4 passes by, it transmits a signal to the control module. The control module controls the first electromagnet 24 to lose power and controls the second electromagnet 19 to be energized. The limit plate 23 is driven by the first spring 25 to rise partially and extend out of the lifting groove 22. When the feed tray 2 rotates to transfer the workpiece 4 to the spraying station, the positioning plate 26 below the workpiece 4 abuts against the limiting plate 23 to limit the rotation of the positioning plate 26, thereby limiting the rotation of the feed tray 2 and the driven shaft 13. However, at this time, the driving shaft 14 is still rotating in the forward direction, so the locking block 17 is driven to retract by squeezing the inclined surface 1701 until it is disengaged from the locking groove 18 to complete the unlocking between the driving shaft 14 and the driven shaft 13. The retraction of the locking block 17 shortens the distance between it and the second electromagnet 19. Under the magnetic attraction of the second electromagnet 19, the locking block 17 further retracts to the maximum stroke position where it fits with the second electromagnet 19 and is limited there.

[0067] When the locking block 17 retracts to the maximum stroke, it touches the touch switch 21. The touch switch 21 transmits a signal to the control module. The control module controls the third electromagnet 34 to be energized and drives the control pump 12 to start. The plug block 31 partially extends out of the sliding groove 30 under the magnetic attraction of the third electromagnet 34 and is inserted into the slot 33. Since the rotating shaft 28 and the driving shaft 14 rotate at the same time, the driving shaft 14 rotates forward to drive the screw rod 6 to rotate forward to drive the nozzle 5 to move from the initial position to the opening of the spray room 1. The nozzle 5 sprays liquid while moving to achieve spraying of the workpiece 4 on the spraying station. The nozzle 5 moves to the side wall where the guide block 7 and the guide groove 8 are close to the opening of the spray room 1, and the sensor device on the side wall transmits a signal to the control module. The control module controls the motor 15 to reverse, and the drive shaft 14 rotates in the opposite direction to drive the screw 6 to rotate in the opposite direction to drive the nozzle 5 from the opening of the spray room 1 to the initial position. The nozzle 5 moves to the side wall where the guide block 7 and the initial position are close to the initial position, and the sensor device on the side wall transmits a signal to the control module. The control module controls the motor 15 to reverse, and the drive shaft 14 rotates forward. At this time, the guide block 7 touches the second sensor component 9 once, that is, one spraying is completed, and the second sensor component 9 transmits a signal to the control module for recording. In this embodiment, the target number of completed spraying is set to once, that is, the workpiece 4 is sprayed at this time.

[0068] After the control module determines that the workpiece 4 has completed spraying, the control module controls the first electromagnet 24 to be energized and the second electromagnet 19 to be de-energized. The locking block 17 is driven by the second spring 20 to extend outward and disengage from the touch switch 21. The touch switch 21 transmits a signal to the control module. The control module controls the third electromagnet 34 to be de-energized and drives the control pump 12 to be closed. The nozzle 5 stops spraying liquid. The plug block 31 retracts to be disengaged from the slot 33 under the action of the tension spring 32. The screw 6 stops rotating and the nozzle 5 remains stationary at the initial position. At the same time, the limit plate 23 retracts and is limited in the lifting slot 22 under the magnetic attraction of the first electromagnet 24. The resistance on the positioning plate 26 disappears. When the drive shaft 14 rotates forward until the telescopic slot 16 and the locking slot 18 are facing each other, the locking block 17 is reinserted into the locking slot 18. The drive shaft 14 rotates forward, driving the driven shaft 13 and the feeding tray 2 to rotate forward to transfer the workpiece 4 from the spraying station to the loading station. When the operator sees the workpiece 4 being transferred from the spray booth 1 to the loading station, the operator can turn off the motor 15 through the control module and then perform unloading and loading.

[0069] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A spraying device for automobile interior parts, comprising a spraying room (1) with an opening on the side, a loading station arranged outside the spraying room (1), a spraying station arranged inside the spraying room (1), and a conveying structure for conveying a workpiece (4) from the loading station to the spraying station, the conveying structure comprising a feeding tray (2) rotatably arranged on the spraying room (1), a placement table (3) arranged on the feeding tray (2) for storing the workpiece (4), and a driving structure for driving the feeding tray (2) to rotate, a spray head (5) is arranged above the spraying station in the spraying room (1) for reciprocating movement and spraying the workpiece (4) on the spraying station during movement, the movement of the spray head (5) being controlled by the moving structure, characterized in that: The movable structure comprises a screw rod (6) rotatably arranged in the spraying room (1) and a guide block (7) threadably matched with the screw rod (6) and linearly slidably matched with the guide of the spraying room (1), and the spray head (5) is arranged on the guide block (7); The driving structure comprises a driven shaft (13) fixed concentrically with the feeding tray (2) and rotatably connected to the spray booth (1), a driving shaft (14) plugged into an end of the driven shaft (13) away from the feeding tray (2), and a motor (15) for driving the driving shaft (14) to rotate; The switching structure is arranged between the screw (6), the drive shaft (14) and the driven shaft (13); when the placement table (3) is transferred to the spraying station, the drive shaft (14) and the screw (6) are driven to rotate simultaneously and the driven shaft (13) is controlled to be stationary; when the spraying is completed and before the placement table (3) is rotated to the spraying station again, the drive shaft (14) and the driven shaft (13) are driven to rotate simultaneously and the screw (6) is controlled to be stationary; The switching structure comprises a locking block (17) which is elastically and telescopically arranged on the outer ring wall of the driving shaft (14) and is plugged into the driven shaft (13) when partially extended and is disengaged from the driven shaft (13) after retracting; a control structure is arranged between the locking block (17) and the spraying room (1) to control the locking block (17) to retract when the placement table (3) is transferred to the spraying station and to drive the locking block (17) to partially extend after the spraying is completed; and a transmission structure is arranged between the driving shaft (14) and the spray head (5) to drive the spray head (5) to spray liquid and drive the screw rod (6) to rotate when the locking block (17) retracts to the maximum stroke, or to control the spray head (5) to stop spraying liquid and control the screw rod (6) to stop rotating when the locking block (17) extends outward; The control structure comprises a limiting structure arranged in the spraying room (1) and limiting the rotation of the feeding plate (2) when the placement table (3) rotates to the spraying station and releasing the limit on the feeding plate (2) after spraying is completed; the locking block (17) is provided with an extrusion inclined surface (1701) for driving the locking block (17) to retract when the driven shaft (13) is stationary and the driving shaft (14) rotates; the driving shaft (14) is provided with an adsorption structure for driving the locking block (17) to further retract to the maximum stroke and limit the position after the locking block (17) retracts and releasing the limit on the locking block (17) after spraying is completed; and a second spring (20) is arranged between the driving shaft (14) and the locking block (17) for driving the locking block (17) to partially extend when the adsorption structure releases the limit on the locking block (17); The limiting structure comprises a positioning plate (26) protruding from the bottom of the feeding tray (2) below the placing table (3), a positioning plate (26) which is arranged to be rotatable when ascending and abuts against a limiting plate (23) which limits the rotation of the feeding tray (2) and releases the limiting of the positioning plate (26) when descending, and a lifting structure for controlling the lifting of the limiting plate (23); The lifting structure comprises a first electromagnet (24) arranged in the spraying room (1) and controlling the limit plate (23) to descend when energized, and a first spring (25) arranged between the spraying room (1) and the limit plate (23) and driving the limit plate (23) to ascend when the first electromagnet (24) loses power. A first sensor component (27) electrically connected to the first electromagnet (24) and driving the first electromagnet (24) to lose power when sensing that a workpiece (4) passes through it, and a second sensor component (9) electrically connected to the first electromagnet (24) and driving the first electromagnet (24) to energize when sensing that a guide block (7) touches it to reach a target number of times of spraying completion are arranged in the spraying room (1); The adsorption structure comprises a second electromagnet (19) which is energized and arranged in the driving shaft (14) and drives the locking block (17) to continue to retract to the maximum stroke and limit the position when the locking block (17) retracts; when the second electromagnet (19) loses power, the adsorption limit of the locking block (17) is released; the energization or de-energization of the second electromagnet (19) is controlled by the first sensor component (27) and the second sensor component (9); when the workpiece (4) passes through the first sensor component (27), the second electromagnet (19) is energized; when the second sensor component (9) senses that the guide block (7) has reached the target number of times of spraying, the second electromagnet (19) loses power; The transmission structure comprises a rotating shaft (28) arranged on the spray room (1) and rotating simultaneously with the driving shaft (14) and having one end coaxially plugged with the screw (6), a connecting structure arranged between the rotating shaft (28) and the screw (6) so that the two rotate simultaneously or the rotating shaft (28) rotates relative to the screw (6), a control pump (12) connected to the spray head (5) and capable of controlling the spraying of liquid, and a touch switch (21) arranged in the driving shaft (14) and connected to the control pump (12) and the connecting structure; when the locking block (17) retracts to the maximum stroke, it contacts the touch switch (21) to drive the control pump (12) to control the spray head (5) to spray liquid and drives the rotating shaft (28) and the screw (6) to rotate simultaneously; when the locking block (17) extends outward, it disengages from the touch switch (21) to drive the control pump (12) to control the spray head (5) to stop spraying liquid and drives the rotating shaft (28) to rotate relative to the screw (6); The connection structure comprises a non-circular plug-in block (31) which is partially telescopically arranged at the end of the screw rod (6) along its own axial direction, a slot (33) which is recessed at the end of the rotating shaft (28) and is adapted to the plug-in block (31), and a third electromagnet (34) which is arranged at the bottom of the slot (33) and is electrically connected to the touch switch (21) and drives the plug-in block (31) to partially extend and insert into the slot (33) when energized, and a tension spring (32) is arranged between the screw rod (6) and the plug-in block (31) which drives the plug-in block (31) to retract and disengage from the slot (33) when the third electromagnet (34) loses power.

2. The spraying device for automobile interior decoration parts according to claim 1, characterized in that: A gear set (35) is arranged between the rotating shaft (28) and the driving shaft (14) to enable the two to rotate simultaneously. The gear set (35) includes a driving gear (3501) fixedly arranged concentrically on the driving shaft (14), a driven gear (3503) fixedly arranged concentrically on the rotating shaft (28), and a gear transmission assembly (3502) rotatably arranged in the spray booth (1) and respectively meshing with the driving gear (3501) and the driven gear (3503) to achieve simultaneous rotation of the driving shaft (14) and the rotating shaft (28).

3. A spraying device for automobile interior parts according to claim 2, characterized in that: The spray booth (1) is provided with a liquid storage barrel (10) which is connected to the spray head (5) via a control pump (12). A stirring structure is provided in the liquid storage barrel (10). The stirring structure comprises a rotatably arranged stirring shaft (36) and stirring blades (37) arranged on the stirring shaft (36). A transmission gear (38) which meshes with a driving gear (3501) is coaxially fixedly arranged on the stirring shaft (36).

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