A suspended chain workpiece coating system

Abstract

The application discloses a kind of hanging chain type workpiece coating systems, including hanging chain device, spraying device, paint dipping device and at least two baking devices;Hanging chain device includes chain conveying mechanism, two workpiece lifting mechanisms and multiple suspension mechanisms.The hanging chain type workpiece coating system utilizes each suspension mechanism to hang workpiece, and is transported in assembly line by chain conveying mechanism, so that multi-angle stereo sound paint spraying operation can be carried out on workpiece, ensure the comprehensiveness of workpiece coating paint spraying, reduce the workload of manual paint repair in later period, enhance the coating processing quality of workpiece;Utilize paint dipping device can be cooperated with hanging chain device, so as to realize dip coating, compared with the existing carrying trolley and spraying mode has better coating comprehensiveness, ensure the coating quality of workpiece;Utilize spraying device can carry out surface cleaning before workpiece is dipped in paint, ensure the coating quality of workpiece.

Description

Technical Field

[0001] This invention relates to a coating system, and more particularly to a suspended chain workpiece coating system. Background Technology

[0002] Existing workpiece coating systems utilize transport trolleys for continuous workpiece transport and processing. However, during transport, blind spots exist at the bottom of the workpieces placed on the trolley. Therefore, in the continuous coating process, large areas require manual touch-up painting after each step, resulting in low automation and numerous issues with incomplete manual processing and inconsistent quality control. Therefore, it is necessary to design a suspended chain workpiece coating system that transports workpieces via suspension, minimizes connection points, reduces the amount of manual touch-up painting required, and improves the overall coating quality. Summary of the Invention

[0003] Purpose of the invention: To provide a suspended chain workpiece coating system that can transport workpieces by suspension, thereby enhancing the coating quality of the workpieces.

[0004] Technical Solution: The suspended chain workpiece coating system of the present invention includes a suspended chain device, a spraying device, a dipping device, and at least two baking devices; the suspended chain device includes a chain conveying mechanism, two workpiece lifting mechanisms, and multiple suspension mechanisms; each suspension mechanism is suspended and mounted on the chain conveying mechanism at intervals, and is moved by the chain conveying mechanism, and the suspension mechanism is used to suspend the workpiece; the two workpiece lifting mechanisms are respectively set on the loading side and unloading side of the chain conveying mechanism, and are used to lift and raise the workpiece during loading and unloading; the spraying device, the dipping device, and each baking device are distributed along the chain conveying mechanism, and at least one baking device is set between the spraying device and the dipping device, and at least one baking device is set between the dipping device and the unloading side, the baking device bakes the workpiece with hot air, the spraying device washes and cleans the workpiece, and the dipping device dips the workpiece with paint.

[0005] Furthermore, the chain conveying mechanism includes a chain support unit, a conveying chain, a chain drive unit, a chain tensioning unit, and various suspension nodes. Each suspension node is movably mounted on the chain support unit, and the conveying chain is loop-mounted onto each suspension node. The chain drive unit is mounted on the chain support unit and is used to drive the conveying chain to move each suspension node. The chain tensioning unit is mounted on the chain drive unit and is used to press and tension the conveying chain. Each suspension mechanism is suspended on its respective suspension node, and the workpiece is suspended by the hook of the suspension mechanism. Each conical support seat is distributed on the inner wall of the hook. A workpiece support roller is rotatably mounted on the upper limit of the conical support seat.

[0006] Furthermore, the chain drive unit includes a conveyor drive motor, a gearbox, a chain drive gear, and two support side arms; the gearbox is horizontally fixed to the turning point of the chain support unit via the two support side arms; the chain drive gear is rotatably mounted on the lower side of the gearbox via a gear drive shaft; the conveyor drive motor drives the gear drive shaft to rotate via a gear transmission unit inside the gearbox; the chain drive gear meshes with the conveyor chain; and a chain tensioning unit is mounted on the support side arms to press the conveyor chain at the corresponding position onto the chain drive gear.

[0007] Furthermore, the workpiece lifting mechanism includes a lifting and lowering drive unit, two lifting seats, a limiting swing rod, a limiting rotating shaft, and a return spring. Both lifting seats are mounted on the lifting and lowering drive unit, which synchronously drives their lifting and lowering movements. The limiting rotating shaft is movably mounted through the two lifting seats, with a limiting slot on its side at the through-hole position. Two limiting protrusions and a limiting ring are provided on the limiting rotating shaft. The return spring is sleeved on the limiting rotating shaft and elastically supported between the lifting seats and the limiting ring, used to push the limiting rotating shaft axially. The lower end of the limiting swing rod is vertically fixed to the limiting rotating shaft, and after the limiting protrusions enter the limiting slot, the limiting swing rod is in a vertical state, used to prevent the workpieces supported on the two lifting seats from tipping over.

[0008] Furthermore, the spraying device includes a spraying shell, a water supply mechanism, and two spraying mechanisms (front and rear). Each spraying mechanism includes a spacing adjustment unit, a swing drive unit, a main conveyor pipe, and individual spraying main pipes. Spraying inlet and outlet windows are provided on both the left and right sides of the spraying shell, and a chain conveyor mechanism passes through these windows. The main conveyor pipes of the two spraying mechanisms are horizontally installed on the front and rear sides inside the spraying shell via the spacing adjustment unit, which adjusts the spacing between the two main conveyor pipes. The water supply mechanism is connected to both main conveyor pipes. The spraying main pipes are vertically and rotatably mounted on the main conveyor pipes, and a connecting hole is provided on the pipe wall inside the main conveyor pipe. The swing drive unit is installed on the main conveyor pipe to synchronously drive the rotation of each spraying main pipe on the same side. Spray head units for uniform spraying are spaced apart and connected on the main spray pipes.

[0009] Furthermore, the immersion apparatus includes an immersion tank, an inlet guide chute, an outlet guide chute, an inlet guide mechanism, and a paint control mechanism;

[0010] The entry guide chute and exit guide chute are respectively connected to the workpiece entry side and workpiece exit side of the immersion tank, and the openings of the entry guide chute, immersion tank, and exit guide chute all face upwards; the chain conveyor mechanism spans above the entry guide chute, immersion tank, and exit guide chute, and the height of the chain conveyor mechanism gradually decreases above the entry guide chute, remains horizontal above the immersion tank, and gradually increases above the exit guide chute; the entry guide mechanism is installed above the entry guide chute to guide and limit the workpiece, so that the workpiece is stably conveyed into the entry guide chute; the paint control mechanism is installed in the exit guide chute to vibrate and control the paint on the workpiece after it passes through the exit guide chute, so that excess paint on the surface of the workpiece falls back into the exit guide chute and then flows back into the immersion tank.

[0011] Furthermore, the entry guiding mechanism includes two guide brackets; each guide bracket includes a height adjusting tube, an L-shaped support rod, an entry guide rod, two spacing adjusting screws, and two vertical support rods; the two height adjusting tubes of the two guide brackets are both vertically arranged on the impregnation tank and are located on the front and rear sides of the entry guide chute, respectively; one end of the L-shaped support rod is inserted into the height adjusting tube and locked in place by a height locking bolt; the two spacing adjusting screws are both horizontally installed through the horizontal bar of the L-shaped support rod and clamped and locked by two spacing positioning nuts; the two vertical support rods are respectively vertically fixed to the ends of the two spacing adjusting screws, and the entry guide rod is horizontally fixed to the upper end of the two vertical support rods, with a bent guide rod provided at the end of the entry guide rod; the bent guide rods of the two guide brackets are distributed in a figure-eight shape on the entry side of the workpiece.

[0012] Furthermore, the paint control mechanism includes a brace drive motor, a vibrator, a swing drive rod, a rotating sleeve, and a support base mechanism; the support base mechanism is fixedly installed on the bottom of the groove away from the guide chute; a swing support seat is provided on the support base mechanism, and a swing support shaft is horizontally rotatably installed on the swing support seat; the lower end of the swing drive rod is vertically fixed to the middle of the swing support shaft, and the rotating sleeve is rotatably installed on the swing drive rod; the brace drive motor is installed on the support base mechanism and drives the swing support shaft to rotate through a swing worm gear mechanism; the vibrator is fixedly installed on the support base mechanism.

[0013] Furthermore, the baking device includes a baking shell, a hot air blower, two strip-shaped air boxes, an air supply mechanism, a return air mechanism, a side distance adjustment mechanism, and an air outlet size adjustment mechanism. A baking inlet / outlet window is provided on both the left and right sides of the baking shell, and the chain conveyor mechanism passes through the two baking inlet / outlet windows. The two strip-shaped air boxes are installed on the front and rear sides inside the baking shell via the side distance adjustment mechanism, which adjusts the distance between the two strip-shaped air boxes. Air outlet windows are provided on the opposite sides of the two strip-shaped air boxes for blowing baking hot air onto the conveyed workpiece. The air supply mechanism is installed on the inner top of the baking shell for supplying baking hot air to the two strip-shaped air boxes. The air outlet size adjustment mechanism adjusts the size of the air outlet windows of the two strip-shaped air boxes. The return air mechanism is installed on the inner bottom of the baking shell and is connected to the air inlet of the hot air blower via a return air duct. The air outlet of the hot air blower is connected to the air supply mechanism.

[0014] Furthermore, the air outlet size adjustment mechanism includes two upper wind deflectors, two lower wind deflectors, and two suspension adjustment units. Snap-on strips are vertically installed on both sides of the air outlet window. The two upper wind deflectors are inserted downwards from the upper side of the two strip-shaped air boxes into the upper part of the snap-on grooves of the left and right snap-on strips, and the two lower wind deflectors are inserted upwards from the lower side of the two strip-shaped air boxes into the lower part of the snap-on grooves of the left and right snap-on strips.

[0015] The suspension adjustment unit includes two suspension support shafts, four columnar gears, two synchronizing gears, a synchronizing chain, four suspension rods, four adjusting racks, and four adjusting seats. The two suspension support shafts are longitudinally rotatably mounted on the upper part of the baking shell, with one end of the suspension support shaft extending beyond the baking shell and equipped with an adjusting worm gear mechanism for rotational adjustment at the extended end. The four columnar gears are coaxially fixedly mounted on the two suspension support shafts in pairs. The adjusting seats have vertically penetrating suspension rod through holes and longitudinally penetrating columnar gear through holes. The suspension rods are perforated, and the through holes are connected to the through holes of the spur gears. Four adjusting seats are fitted onto four spur gears through their respective spur gear through holes. Four adjusting racks are vertically fixed to the upper ends of the four suspension rods, and the four adjusting racks, together with the corresponding four suspension rods, are vertically inserted into the four suspension rod through holes of the four adjusting seats. The four adjusting racks mesh with the spur gears at their corresponding positions. Two synchronizing gears are coaxially fixed on the two suspension support shafts, and a synchronizing chain surrounds the two synchronizing gears to achieve synchronous transmission.

[0016] The lower ends of the four suspension rods of one suspension adjustment unit are fixed in pairs to the lower wind deflector on the corresponding side, and the lower ends of the four suspension rods of the other suspension adjustment unit are fixed in pairs to the upper wind deflector on the corresponding side; the axial positions of the synchronous gears of the two suspension adjustment units on the suspension support shaft are staggered, and the installation positions of the suspension support shafts of the two suspension adjustment units are staggered.

[0017] Compared with existing technologies, the advantages of this invention are as follows: By using various suspension mechanisms to suspend workpieces and conveying them in a continuous flow via a chain conveyor, multi-angle stereoscopic painting operations can be performed on the workpieces, ensuring comprehensive painting coverage, reducing the workload of manual touch-ups, and enhancing the painting quality. The workpiece lifting mechanism allows workers to easily load or unload heavy workpieces from the suspension mechanism, reducing worker workload and improving efficiency. The dip-painting device works in conjunction with the suspension chain device to achieve dip-painting, providing better comprehensive painting coverage and ensuring workpiece painting quality compared to existing transport carts and spraying methods. The spraying device cleans the workpiece surface before dip-painting, ensuring painting quality. The baking device bakes the workpiece surface, evaporating sprayed moisture and curing the dip-painted paint, ensuring reliable continuous painting operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the system layout of the present invention;

[0019] Figure 2 This is a schematic diagram of the suspension chain device of the present invention;

[0020] Figure 3 This is a schematic diagram of the chain drive mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the workpiece lifting mechanism of the present invention;

[0022] Figure 5 This is a cross-sectional view of the workpiece lifting mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the suspension node and suspension mechanism of the present invention;

[0024] Figure 7 This is a schematic cross-sectional view of the spray device of the present invention;

[0025] Figure 8 This is a longitudinal sectional view of the spray device of the present invention;

[0026] Figure 9 This is a schematic diagram of the water tank supply mechanism of the present invention;

[0027] Figure 10 This is a schematic diagram of the spray branch mechanism of the present invention;

[0028] Figure 11 This is a schematic diagram of the coating impregnation apparatus of the present invention;

[0029] Figure 12 This is a partial structural diagram of the coating impregnation apparatus of the present invention;

[0030] Figure 13 This is a longitudinal sectional view of the coating impregnation apparatus of the present invention;

[0031] Figure 14 This is a schematic diagram of the paint control mechanism installation structure of the present invention;

[0032] Figure 15 This is a schematic diagram of the baking apparatus of the present invention;

[0033] Figure 16 This is a longitudinal sectional view of the baking apparatus of the present invention.

[0034] Figure 17 This is a schematic diagram of the air outlet mechanism of the present invention;

[0035] Figure 18 This is a schematic diagram of the hook structure of the present invention;

[0036] Figure 19 This is a schematic diagram of the hook roller limiting structure of the present invention. Detailed Implementation

[0037] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0038] Example 1:

[0039] like Figure 1-19 As shown, the suspended chain workpiece coating system disclosed in this invention includes: a suspended chain device 1, a spraying device 2, a dipping device 3, and at least two baking devices 4; the suspended chain device 1 includes a chain conveying mechanism, two workpiece lifting mechanisms, and multiple suspension mechanisms; each suspension mechanism is suspended and mounted on the chain conveying mechanism at intervals, and the chain conveying mechanism transports each suspension mechanism to move, and the suspension mechanism is used to suspend the workpiece 100; the two workpiece lifting mechanisms are respectively set on the loading side and unloading side of the chain conveying mechanism, and are used to lift and raise the workpiece 100 when loading and unloading; the spraying device 2, the dipping device 3, and each baking device 4 are distributed along the chain conveying mechanism, and at least one baking device 4 is set between the spraying device 2 and the dipping device 3, and at least one baking device 4 is set between the dipping device 3 and the unloading side, the baking device 4 bakes the workpiece 100 with hot air, the spraying device 2 washes and cleans the workpiece 100, and the dipping device 3 dips the workpiece 100 in paint.

[0040] The system utilizes various suspension mechanisms to suspend workpieces 100 and a chain conveyor for continuous transport, enabling multi-angle stereoscopic painting of workpieces 100. This ensures comprehensive painting coverage, reduces manual touch-up work, and enhances the painting quality. A workpiece lifting mechanism supports the workpieces 100, facilitating the loading and unloading of heavier workpieces, reducing worker workload and increasing efficiency. The dipping device 3, in conjunction with the suspension chain device 1, enables dipping painting, offering better coverage and quality assurance compared to existing transport carts and spraying methods. A spraying device 2 cleans the surface of workpieces 100 before dipping, ensuring painting quality. A baking device 4 bakes the surface of workpieces 100, evaporating sprayed moisture and curing the dipped paint, ensuring reliable continuous painting operation.

[0041] Furthermore, the chain conveying mechanism includes a chain support unit, a conveying chain 104, a chain drive unit, a chain tensioning unit, and various suspension nodes; each suspension node is movably mounted on the chain support unit, and the conveying chain 104 is loop-mounted on each suspension node; the chain drive unit is mounted on the chain support unit and is used to drive the conveying chain 104 to drag each suspension node to move; the chain tensioning unit is mounted on the chain drive unit and is used to press and tension the conveying chain 104; each suspension mechanism is suspended on each suspension node, and the workpiece 100 is suspended by the hook 130 of the suspension mechanism; each conical support seat 131 is distributed on the inner wall of the hook of the hook 130; a workpiece support roller 149 is rotatably mounted on the conical support seat 131, for example, the workpiece support roller 149 can only rotate half a turn. The chain tensioning unit ensures that the conveyor chain 104 is pressed and tensioned onto the chain drive gear 110 of the chain drive unit, preventing the chain drive gear 110 from skipping teeth during drive. The various suspension nodes enable the suspension installation of the conveyor chain 104, ensuring stable movement of the conveyor chain 104 along the I-shaped support track 101 of the chain support unit. The workpiece support rollers 149 provide rolling support for the workpiece 100, allowing it to move slightly as it descends into the immersion tank 301 and rises out of the immersion tank 301, enabling the paint to spread and cover the entire surface of the workpiece 100, ensuring comprehensive coating. By limiting the rotation range of the workpiece support rollers 149, the workpiece 100 is prevented from swaying excessively during movement, maintaining a certain level of suspension stability.

[0042] Furthermore, the chain support unit includes an I-shaped support rail 101 and various L-shaped support columns 102; the I-shaped support rail 101 is arranged in a closed loop, and each L-shaped support column 102 has a mounting base plate 103 at its lower end, with the cantilevered ends of each L-shaped support column 102 fixed to the upper side of the I-shaped support rail 101. The L-shaped support columns 102 allow for suspended installation from the top of the I-shaped support rail 101, thus not affecting the normal movement and transportation of the various suspension nodes suspended by the I-shaped support rail 101; the I-shaped support rail 101 facilitates stable mounting of the suspension nodes and allows for easy turning and bending at the chain drive unit installation position, as well as downward bending into and upward bending out of the impregnation device 3.

[0043] Furthermore, the suspension node includes two rectangular roller plates 120, eight support rollers 121, a U-shaped support plate 122, and a suspension plate 123; the two rectangular roller plates 120 are arranged parallel to each other on the upper side of the U-shaped support plate 122, and the eight support rollers 121 are rotatably installed at the four apex corners of the opposite inner sides of the two rectangular roller plates 120; the two rectangular roller plates 120 are clamped on both sides of the I-shaped support rail 101, and the eight support rollers 121 are respectively supported on the upper and lower side grooves of the side grooves of the I-shaped support rail 101; the suspension plate 123 is vertically fixed at the bottom of the U-shaped support plate 122; the suspension plate 123 is installed on the conveyor chain 104 by a pressing member 124. Eight support rollers 121 can be used to stably snap two rectangular roller plates 120 onto the two sides of the I-shaped support rail 101, enabling stable movement of the suspension node; the U-shaped support plate 122 can stably install the two rectangular roller plates 120 and facilitate the installation of the suspension plate 123.

[0044] Furthermore, the suspension mechanism includes an upper U-shaped seat 125, a lower U-shaped seat 126, a suspension connecting plate 127, an I-shaped insert seat 128, a U-shaped buckle head 129, and a hook 130. The upper U-shaped seat 125 is hinged to the suspension node, specifically hinged to the lower end of the suspension plate 123. The lower U-shaped seat 126 is hinged to the upper end of the suspension connecting plate 127. The upper U-shaped seat 125 and the lower U-shaped seat 126 are rotatably installed. The lower end of the suspension connecting plate 127 is fixed to the upper side of the I-shaped insert seat 128. The U-shaped buckle head 129 is slidably snapped onto the I-shaped insert seat 128, and a positioning bolt is threaded onto the U-shaped buckle head 129. The hook 130 extends into the locking hole on the I-shaped insert 128; the upper end of the hook 130 is fixed to the U-shaped buckle head 129, and each conical support seat 131 is distributed on the inner wall of the hook 130; a workpiece support roller 149 is rotatably mounted on the conical support seat 131 in an upper limit manner. Specifically, a roller groove is provided on the conical support seat 131, and a limiting circular groove 151 is provided on both opposite sides of the roller groove; the workpiece support roller 149 rotates between the limiting circular grooves 151 on both sides via the roller shaft 150; a shaft limiting block 152 is provided on the roller shaft 150, and two rotating limiting protrusions 153 are provided in the limiting circular groove 151 to limit the rotation range of the shaft limiting block 152. The workpiece support rollers 149, which are rotatably mounted on each conical support base 131, can effectively reduce the contact area between the hook of the hook 130 and the workpiece 100, allowing the surface of the workpiece 100 to be fully immersed in paint. The workpiece support rollers 149, which are designed for limited rotation, can move slightly during the process of the workpiece 100 entering and exiting the paint immersion tank 301, so that the surface of the workpiece 100 can be completely covered with paint, and there is no problem of local unpainted areas caused by pressing. The installation and cooperation of the I-shaped insert base 128, the U-shaped buckle head 129 and the positioning bolts can realize the overall quick replacement of the hook 130, thereby meeting the hanging requirements of workpieces 100 of different sizes and models.

[0045] Furthermore, the chain drive unit includes a conveyor drive motor 106, a gearbox 105, a chain drive gear 110, and two support side arms 107. The gearbox 105 is horizontally fixed to the bend of the I-shaped support rail 101 of the chain support unit via the two support side arms 107. The chain drive gear 110 is rotatably mounted on the lower side of the gearbox 105 via a gear drive shaft. The conveyor drive motor 106 drives the gear drive shaft to rotate via a gear transmission unit inside the gearbox 105. The chain drive gear 110 meshes with the conveyor chain 104. A chain tensioning unit is mounted on the support side arms 107 to press the conveyor chain 104 at the corresponding position onto the chain drive gear 110. The chain drive gear 110 reliably drives the conveyor chain 104, and the chain tensioning unit further enhances the reliability of the drive.

[0046] Furthermore, the gear transmission unit includes a large gear 118 and a small gear 119. The large gear 119 is coaxially mounted on the upper end of the gear drive shaft, and the small gear 119 is fixed to the end of the output shaft of the conveyor drive motor 106. The large gear 118 and the small gear 119 mesh and transmit power. By utilizing the meshing transmission between the large gear 118 and the small gear 119, the conveyor drive motor 106 can be driven by speed reduction.

[0047] Furthermore, the chain tensioning unit includes two tensioning components, each including a tensioning pulley 109, a tensioning shaft 108, a tension adjusting screw 113, a tensioning spring 116, a tensioning seat 111, and two locking nuts 117. A strip-shaped adjusting hole 112 is provided on the suspended end of the support arm 107. The tensioning seat 111 is slidably mounted on the strip-shaped adjusting hole 112, and the upper end of the tensioning shaft 108 is fixed to the tensioning seat 111. The tensioning pulley 109 is rotatably mounted on the lower end of the tensioning shaft 108, and the tensioning pulley 109 presses the conveyor chain 104 against the chain. The drive gear 110 meshes with the tensioning gear; a tensioning support seat 114 is provided on the support arm 107; one end of the tensioning adjusting screw 113 is fixed on the tensioning seat 111, and the other end movably passes through the tensioning support seat 114; two locking nuts 117 are simultaneously screwed onto the through end of the tensioning adjusting screw 113; a tensioning spring 116 is sleeved on the tensioning adjusting screw 113, and one end is supported on the tensioning support seat 114; an annular washer 115 is provided on the tensioning adjusting screw 113, and the annular washer 115 is located between the tensioning spring 116 and the locking nut 117. The tension spring 116 can elastically pull the tension adjusting screw 113, thereby keeping the tension pulley 109 in a tensioned state; the tension seat 111 is slidably installed on the strip-shaped adjusting hole 112, which can enhance the stability of the tension pulley 109; the tension strength of the tension spring 116 can be adjusted by using two locking nuts 117.

[0048] Furthermore, the workpiece lifting mechanism includes a lifting and lowering drive unit, two lifting seats 136, a limiting swing rod 140, a limiting rotating shaft 137, and a return spring 139; both lifting seats 136 are mounted on the lifting and lowering drive unit, which synchronously drives the two lifting seats 136 to move up and down; the limiting rotating shaft 137 is movably mounted through the two lifting seats 136, and a limiting slot 142 is provided on the side at the through position; two limiting protrusions 141 and a return spring 139 are provided on the limiting rotating shaft 137. A limiting ring 138 and a reset spring 139 are sleeved on the limiting rotating shaft 137 and elastically supported between the support seat 136 and the limiting ring 138. The spring is used to push the limiting rotating shaft 137 to move axially, so that the limiting protrusion 141 enters the limiting groove 142 at the corresponding position. The lower end of the limiting rocker arm 140 is vertically fixed on the limiting rotating shaft 137. After the limiting protrusion 141 enters the limiting groove 142, the limiting rocker arm 140 is in a vertical state, which is used to tilt and prevent the workpieces 100 supported on the two support seats 136 from tipping over. The reset spring 139 can elastically push the limiting shaft 137 to move axially, so that after the limiting rocker arm 140 swings to the vertical position, it can promptly push the limiting protrusion 141 into the limiting slot 142, and enhance the reliability of the vertical position of the limiting rocker arm 140. The rotatably mounted limiting shaft 137 can first tilt the limiting rocker arm 140 when the workpiece 100 is placed on the two support seats 136, thus forming an inclined guiding effect, so that the workpiece 100 can be dragged along the tilted limiting rocker arm 140 to the two support seats 136 under manual action. Rotating the limiting shaft 137 makes the limiting rocker arm 140 vertical, which can protect the workpiece 100 from tipping over during the lifting and lowering process.

[0049] Furthermore, the lifting and lowering drive unit includes a control box 133, a lifting housing 132, a lifting drive motor 144, and two lifting lead screws 135. The control box 133 is located on the top of the lifting housing 132, and contains a lifting controller and a lifting drive circuit. An up button and a down button, electrically connected to the lifting controller, are located on the top of the control box 133. The two lifting lead screws 135 are vertically rotatably mounted inside the lifting housing 132, and lifting transmission gears 146 are fixed to the upper ends of both lead screws 135. The lifting drive motor 144 is fixedly mounted inside the lifting housing 132 via a motor mounting bracket 147, and a gear meshing with both lifting transmission gears 146 is mounted on its output shaft. The lifting drive gear 145; two rectangular lifting windows 134 are provided on the vertical side of the lifting housing 132; each of the two lifting seats 136 has a snap-fit ​​groove 143 in the middle, and is slidably installed on the corresponding rectangular lifting window 134 through the snap-fit ​​groove 143; two lifting screws 135 are respectively threaded through and installed on the two lifting seats 136; two guide rails 148 are vertically provided inside the lifting housing 132, and the inner ends of the two lifting seats 136 are respectively slidably snapped onto the two guide rails 148; the lifting controller controls the forward and reverse rotation of the lifting drive motor 144 through the lifting drive circuit; the up button and the down button are used to send up and down control trigger commands to the lifting controller. The two lifting screws 135 rotate synchronously, which can drive the two lifting seats 136 to lift and lower in a synchronous manner; the sliding engagement between the snap-fit ​​groove 143 and the rectangular lifting window 134 can enhance the stability of the lifting and lowering motion of the lifting seats 136; the sliding engagement between the guide rail 148 and the inner end of the lifting seat 136 can further enhance the stability of the lifting and lowering motion of the lifting seat 136.

[0050] Furthermore, the spray device 2 includes a spray housing 201, a water supply mechanism, and two spray mechanisms (front and rear). Each spray mechanism includes a spacing adjustment unit, a swing drive unit, a main conveyor pipe 209, and various main spray pipes 221. Spray inlet / outlet windows 202 are provided on both the left and right sides of the spray housing 201, and a chain conveyor mechanism passes through these windows. The main conveyor pipes 209 of the two spray mechanisms are horizontally installed on the front and rear sides inside the spray housing 201 via the spacing adjustment unit, and the spacing is adjusted accordingly. The unit adjusts the distance between the two conveying main pipes 209; the water supply mechanism is connected to the two conveying main pipes 209 respectively; the spraying main pipe 221 is vertically and rotatably mounted on the conveying main pipe 209, and a rotary seal is set at the through position, and a connecting hole is provided on the pipe wall of the spraying main pipe 221 inside the conveying main pipe 209; the swing drive unit is mounted on the conveying main pipe 209 to synchronously drive the rotation of each spraying main pipe 221 on the same side; each spray head unit for uniform spraying is arranged in a spaced manner on the spraying main pipe 221. The distance adjustment unit can adjust the distance between the two conveying main pipes 209, thereby adjusting according to the size and model of the workpiece 100, ensuring that each spray head unit can be close to the workpiece 100 for spraying, and ensuring the spray cleaning effect; the swing drive unit drives the spraying main pipe 221 to rotate, which can realize multi-angle spraying of the workpiece 100, further enhancing the spray cleaning effect.

[0051] Furthermore, the spray head unit includes a spray branch pipe 225, a spray head pipe 226, and various nozzles 227. The spray branch pipe 225 is connected to the main spray pipe 221, and the spray head pipe 226 is vertically connected to the spray branch pipe 225. The nozzles 227 are distributed and arranged on the spray head pipe 226. By distributing the nozzles 227 on the spray head pipe 226, a larger spray width is obtained, achieving large-area uniform spraying of the workpiece 100 surface.

[0052] Furthermore, the spacing adjustment unit includes two spacing adjustment components, each comprising a side support tube 206, a spacing adjustment screw 207, and a spacing adjustment seat 205. The spacing adjustment seats 205 of the two spacing adjustment components are respectively fixed to both ends of the conveying main tube 209. The side support tube 206 is fixed to the inner wall of the spray housing 201 via a mounting flange 204. One end of the spacing adjustment screw 207 is threaded into the side support tube 206, and the other end is rotatably mounted on the spacing adjustment seat 205. A square block 208 is fixedly provided on the spacing adjustment screw 207 to facilitate its rotation. The spacing adjustment screw 207 can be used to adjust the spacing between the spacing adjustment seat 205 and the side support tube 206, thereby adjusting the position of the conveying main tube 209 and achieving the spacing between the opposing spray main tubes 221 on both the front and rear sides, thus adjusting the spacing between the nozzles 227 and the workpiece 100.

[0053] Furthermore, the oscillating drive unit includes an oscillating drive motor 213, an oscillating drive rack 211, and various oscillating drive gears 212; each oscillating drive gear 212 is fixedly installed on the lower end of each spray main pipe 221; each rack mounting seat 210 is fixedly provided on the side of the conveying main pipe 209, and a T-shaped snap-fit ​​groove is provided on the side of the rack mounting seat 210; the oscillating drive rack 211 is laterally slidably installed on the T-shaped snap-fit ​​groove of each rack mounting seat 210, and the oscillating drive rack 211 is simultaneously mounted on each oscillating drive gear 212; the oscillating drive motor 213 is fixedly installed on the side of the conveying main pipe 209, and an oscillating drive gear 214 that meshes with one oscillating drive gear 212 is installed on the output shaft end of the oscillating drive motor 213. The simultaneous meshing of the swing drive rack 211 with each swing drive gear 212 enables the synchronous rotation drive of each spray pipe 221; the T-shaped snap-fit ​​groove enables the lateral stable sliding installation of the swing drive rack 211.

[0054] Furthermore, the water supply mechanism includes a water storage tank 228, a water supply pump 234, a return water pump 235, a water collection tank 203, a connecting pipe 216, two fixed pipes 217, and two telescopic sleeves 215. The water collection tank 203 is installed on the inner bottom of the spray housing 201 and is connected to the water storage tank 228 through the return water pump 235 and the return water pipe. A one-way valve is installed on the return water pipe to prevent water in the water storage tank 228 from flowing back into the water collection tank 203. In the spray system, two fixed pipes 217 are respectively installed through the front and rear side walls of the spray housing 201, and two telescopic sleeves 215 are respectively slidably and sealingly fitted onto the fixed pipes 217. The two fixed pipes 217 are respectively connected to the main conveying pipes 209 of the two spray mechanisms. Both fixed pipes 217 are connected to the connecting pipe 216. The water pump 234 is located inside the water storage tank 228, and the outlet of the water pump 234 is connected to the connecting pipe 216. By utilizing the water collection tank 203, the return water pump 235, the return water pipe, and the one-way water valve, the spray system can be recycled and reused. By utilizing the cooperation between the fixed pipes 217 and the telescopic sleeves 215, a telescopic water supply connection can be achieved when the spacing of the main conveying pipes 209 is adjusted.

[0055] Furthermore, an electric heating tube 231 extending downwards is installed on the cover plate 229 at the top of the water storage tank 228 for heating the water in the water storage tank 228, and a junction box for the electric heating tube 231 is provided on the cover plate 229; screen slots 232 are vertically provided on the inner walls of the front and rear sides of the water storage tank 228, and spray water filter screens 233 are inserted into the two screen slots 232, and the spray water filter screens 233 are isolated between the water supply pump 234 and the return water pump 235; a water replenishment connection pipe 230 is provided at the top of the water storage tank 228. The electric heating element 231 can heat the spray water, thereby achieving hot water spraying of the workpiece 100, which can thoroughly clean the grease on the surface of the workpiece 100; the spray water filter screen 233 can filter the recovered spray water, thereby ensuring cleanliness when spraying again; the water replenishment connection pipe 230 can facilitate the replenishment of spray water; the screen slot 232 can facilitate the insertion and installation of the spray water filter screen 233, thereby achieving quick replacement and maintenance of the spray water filter screen 233.

[0056] Furthermore, a sliding sleeve 220 is movably mounted on the main spray pipe 221. A stabilizing rod 219 is provided on the outer wall of the sliding sleeve 220, and a stabilizing sleeve 218 is telescopically fitted onto the stabilizing rod 219. The end of the stabilizing sleeve 218 is mounted on the inner wall of the spray housing 201 via a mounting flange. By using the sliding sleeve 220, the stabilizing rod 219, and the stabilizing sleeve 218, the rotational stability of the main spray pipe 221 can be enhanced.

[0057] Furthermore, a spray adjusting rod 222 is inserted into the upper end of the spray main pipe 221, and a waterproof plug is provided on the inserted end of the spray adjusting rod 222 for adjusting the water level in the spray main pipe 221; an adjusting positioning strip 223 is installed on the upper end of the spray adjusting rod 222, and the adjusting positioning strip 223 is bent downward and parallel to the spray main pipe 221; a positioning strip hole is vertically provided on the adjusting positioning strip 223, and a positioning bolt 224 that passes through the positioning strip hole is threaded into the upper end of the spray main pipe 221 for locking the height of the adjusting positioning strip 223. By using the waterproof plug at the insertion end of the spray adjustment rod 222, the water level in the spray main pipe 221 can be adjusted, thereby adjusting the use of several sets of spray head units at the bottom to participate in the spraying according to the size and model of the workpiece 100, avoiding unnecessary spraying water; by using the cooperation of the positioning bolt 224 and the adjusting positioning strip 223, the insertion depth of the spray adjustment rod 222 can be positioned.

[0058] Furthermore, the impregnation device 3 includes an impregnation tank 301, an entry guide chute 306, an exit guide chute 302, an entry guide mechanism, and a paint control mechanism; the entry guide chute 306 and the exit guide chute 302 are respectively connected to the workpiece entry side and the workpiece exit side of the impregnation tank 301, and the openings of the entry guide chute 306, the impregnation tank 301, and the exit guide chute 302 all face upwards; a chain conveyor mechanism spans above the entry guide chute 306, the impregnation tank 301, and the exit guide chute 302, and the chain conveyor mechanism is positioned above the entry guide chute 306. The height gradually decreases above the immersion tank 301, remains horizontal, and gradually increases above the exit guide chute 302. An entry guide mechanism is installed above the entry guide chute 306 to guide and limit the workpiece 100, ensuring its stable transport into the immersion guide chute 306. A paint control mechanism is installed in the exit guide chute 302 to vibrate and control the paint flow of the workpiece 100 after it passes through the exit guide chute 302, causing excess paint on the surface of the workpiece 100 to fall back into the exit guide chute 302 and then flow back into the immersion tank 301. The entry guide mechanism guides and limits the workpiece 100, ensuring its stable transport into the entry guide chute 306; the paint control mechanism vibrates and controls the paint flow of the workpiece 100 after it passes through the exit guide chute 302, causing excess paint on the surface of the workpiece 100 to fall back into the exit guide chute 302 and then flow back into the immersion tank 301 for recycling.

[0059] Furthermore, the entry guide mechanism includes two guide brackets; each guide bracket includes a height adjustment tube 307, an L-shaped support rod 309, an entry guide rod 313, two spacing adjustment screws 311, and two vertical support rods 312; the two height adjustment tubes 307 of the two guide brackets are both vertically arranged on the paint immersion tank 301, and are located on the front and rear sides of the entry guide inclined groove 306 respectively; one end of the L-shaped support rod 309 is inserted into the height adjustment tube 307 and locked and positioned by a height locking bolt 308; Two spacing adjustment screws 311 are horizontally installed on the horizontal bar of the L-shaped bracket rod 309 and clamped and locked by two spacing positioning nuts 310; two vertical support rods 312 are respectively vertically fixed to the ends of the two spacing adjustment screws 311, and the guide rod 313 is horizontally fixed to the upper end of the two vertical support rods 312, and a bent guide rod 330 is provided at the end of the guide rod 313; the bent guide rods 330 of the two guide brackets are distributed in a figure-eight shape on the entry side of the workpiece 100. By using the height adjustment tube 307 and the height locking bolt 308, the height of the L-shaped support rod 309 can be adjusted, thereby allowing the height of the guide rod 313 to be adjusted according to the height of the workpiece 100. By using the two spacing adjustment screws 311 and the two spacing positioning nuts 310, the spacing between the two guide rods 313 can be adjusted according to the size of the workpiece 100. The two bent guide rods 330 distributed in a figure-eight shape can guide the workpiece 100 when it enters.

[0060] Furthermore, the paint control mechanism includes a diagonal brace drive motor 321, a vibrator 318, a swing drive rod 327, a rotating sleeve 328, and a support base mechanism. The support base mechanism is fixedly installed on the bottom of the groove away from the guide sloping groove 302. A swing support seat 320 is provided on the support base mechanism, and a swing support shaft 325 is horizontally rotatably installed on the swing support seat 320. The lower end of the swing drive rod 327 is vertically fixed to the middle of the swing support shaft 325. The rotating sleeve 328 is rotatably installed on the swing drive rod 327, and a wear-resistant sleeve 329 is sleeved on the outside of the rotating sleeve 328. The diagonal brace drive motor 321 is installed on the support base mechanism and drives the swing support shaft 325 to rotate through a swing worm gear mechanism. The vibrator 318 is fixedly installed on the support base mechanism. In use, a position sensor can be installed to detect whether the workpiece 100 is in position, and after it is in position, the diagonal brace drive motor 321 and the vibrator 318 are started to work, so that the wear-resistant sleeve 329 pushes the workpiece 100 to tilt. The rotating sleeve 328 is rotatably mounted on the swing drive rod 327, so that the movement of the workpiece 100 is not affected when it is tilted by the swing. The swing drive rod 327 can realize swing support, thereby tilting and pushing the workpiece 100. Combined with the vibration of the vibrator 318, the excess paint on the workpiece 100 is continuously shaken off into the guide groove 302 during the change of tilt angle, realizing the recycling and reuse of excess paint and preventing excess paint from dripping along the way. The support base mechanism can realize stable support on the inclined slope.

[0061] Furthermore, a lower support plate 303 is provided on the outer bottom of the guide groove 302 and below the support base mechanism. A lower support column 304 is provided on the lower side of the lower support plate 303, and the lower end of the lower support column 304 is fixed to the support base plate 305. The lower support plate 303, the lower support column 304, and the support base plate 305 can achieve bottom support and ensure the stability of the upper support base mechanism during installation.

[0062] Furthermore, the support base mechanism includes an inclined seat 314, four tensioning screws 316, four pressing springs 324, a lower support plate 315, and an upper support plate 317. The inclined seat 314 is fixedly installed on the bottom of the groove away from the guide groove 302, and the lower support plate 315 is horizontally fixed on the inclined seat 314. A rubber support pad 319 is provided on the lower support plate 315, and the upper support plate 317 presses on the rubber support pad 319. The lower ends of the four tensioning screws 316 are respectively vertically fixed at the four top corners of the lower support plate 315, and the upper ends vertically penetrate the upper support plate 317. The four pressing springs 324 are respectively sleeved on the upper ends of the four tensioning screws 316, and two fastening nuts 323 are threadedly installed on the upper ends of the four tensioning screws 316. The pressing springs 324 are clamped between the upper support plate 317 and the fastening nuts 323. By using the coordinated installation of four tensioning screws 316, rubber support pads 319, four pressing springs 324, and various fastening nuts 323, elastic installation can be achieved between the upper support plate 317 and the lower support plate 315, thereby driving the swing drive rod 327 to achieve small-amplitude vibration when the vibrator 318 is working.

[0063] Furthermore, the oscillating worm gear mechanism includes an oscillating drive worm gear 326 and an oscillating drive worm 322. The oscillating drive worm 322 is driven to rotate by a diagonal brace drive motor. The oscillating drive worm gear 326 is fixedly mounted on the end of the oscillating support shaft 325, and the oscillating drive worm gear 326 meshes with the oscillating drive worm 322 for transmission. The oscillating worm gear mechanism enables the rotation and positioning of the oscillating support shaft 325.

[0064] Furthermore, the baking device 4 includes a baking shell 401, a hot air blower 402, two strip-shaped air boxes 406, an air supply mechanism, a return air mechanism, a side distance adjustment mechanism, and an air outlet size adjustment mechanism; a baking inlet / outlet window 414 is provided on both the left and right sides of the baking shell 401, and the chain conveyor mechanism passes through the two baking inlet / outlet windows 414; the two strip-shaped air boxes 406 are installed on the front and rear sides inside the baking shell 401 through the side distance adjustment mechanism, and the distance between the two strip-shaped air boxes 406 is adjusted by the side distance adjustment mechanism. The two strip-shaped air boxes 406 are equipped with air outlet windows on opposite sides to blow baking hot air onto the conveyed workpiece 100. An air supply mechanism is installed on the inner top of the baking shell 401 to supply baking hot air to the two strip-shaped air boxes 406. An air outlet size adjustment mechanism is used to adjust the size of the air outlet windows of the two strip-shaped air boxes 406. A return air mechanism is installed on the inner bottom of the baking shell 401 and connected to the air inlet of the hot air blower 402 via a return air duct 415. The air outlet of the hot air blower 402 is connected to the air supply mechanism. The side distance adjustment mechanism allows for adjustment of the distance between the two strip-shaped air boxes 406 and the workpiece 100, ensuring the air outlet windows are close enough to workpieces 100 of various sizes for baking. The air outlet size adjustment mechanism allows for adjustment of the air outlet surface size at the air outlet windows to meet the baking needs of workpieces 100 of different sizes and reduce unnecessary hot air loss.

[0065] Furthermore, the air outlet size adjustment mechanism includes two upper wind deflectors 430, two lower wind deflectors 416, and two suspension adjustment units. Snap-on strips 417 are vertically installed on both sides of the air outlet window. The two upper wind deflectors 430 are inserted downwards from the upper side of the two strip-shaped air boxes 406 into the upper part of the snap-on grooves of the left and right snap-on strips 417, and the two lower wind deflectors 416 are inserted upwards from the lower side of the two strip-shaped air boxes 406 into the lower part of the snap-on grooves of the left and right snap-on strips 417. The suspension adjustment unit includes two suspension support shafts 424. The oven features four columnar gears 426, two synchronizing gears 421, a synchronizing chain 422, four suspension rods 419, four adjusting racks 420, and four adjusting seats 423. Two suspension support shafts 424 are longitudinally rotatably mounted on the upper part of the baking shell 401, with one end of the suspension support shaft 424 extending beyond the baking shell 401 and equipped with an adjusting worm gear mechanism for rotational adjustment at the extended end. The four columnar gears 426 are coaxially fixedly mounted on the two suspension support shafts 424 in pairs. Vertical through holes for the suspension rods are provided on the adjusting seats 423. A longitudinally penetrating cylindrical gear through hole 425 is provided, and the rod through hole communicates with the interior of the cylindrical gear through hole 425; four adjusting seats 423 are fitted onto four cylindrical gears 426 through their respective cylindrical gear through holes 425; four adjusting racks 420 are respectively vertically fixed to the upper ends of four suspension rods 419, and the four adjusting racks 420 together with the corresponding four suspension rods 419 are respectively vertically inserted into the four rod through holes of the four adjusting seats 423; the four adjusting racks 420 mesh with the cylindrical gears 426 at their corresponding positions; two synchronizing gears 421 respectively mesh with... The suspension adjustment unit is fixedly mounted on two suspension support shafts 424, and the synchronous chain 422 is wrapped around the two synchronous gears 421 to achieve synchronous transmission. The lower ends of the four suspension rods 419 of one suspension adjustment unit are fixed to the lower wind deflector 416 on the corresponding side in pairs, and the lower ends of the four suspension rods 419 of the other suspension adjustment unit are fixed to the upper wind deflector 430 on the corresponding side in pairs. The axial positions of the synchronous gears 421 of the two suspension adjustment units on the suspension support shafts 424 are staggered, and the installation positions of the suspension support shafts 424 of the two suspension adjustment units are staggered. The synchronous chain 422 drives the two synchronous gears 421 synchronously, thereby achieving synchronous rotation of the two suspension support shafts 424, which in turn achieves synchronous lifting and lowering of the four suspension rods 419, ensuring the smooth lifting and lowering of the two upper wind deflectors 430 or the two lower wind deflectors 416. The snap-fit ​​strip 417 enables the stable insertion of the upper wind deflector 430 or the lower wind deflector 416. The cooperation of the column gear 426, suspension rods 419, adjusting rack 420 and adjusting seat 423 facilitates the spacing adjustment of the two adjusting seats 423 with the two strip-shaped air boxes 406, and also enables the adjustment of the lifting and lowering height of the suspension rods 419.

[0066] Furthermore, the adjusting worm gear mechanism includes an adjusting worm gear 427, an adjusting worm 429, and a pitch adjusting handle 428. The adjusting worm gear 427 is fixedly installed on the extended end of the suspension support shaft 424, and the adjusting worm 429 is rotatably installed on the outer wall of the baking shell 401, with the adjusting worm gear 427 meshing with the adjusting worm 429. The pitch adjusting handle 428 is fixedly installed on the end of the adjusting worm 429. The adjusting worm gear mechanism enables the rotation and positioning of the suspension support shaft 424.

[0067] Furthermore, the side distance adjustment mechanism includes two side adjustment units, each including two L-shaped support frames 407, two support slide rails 409, two support rails 408, a side adjustment screw 410, and a side adjustment handle 411. The vertical supports of the two L-shaped support frames 407 are fixed to the vertical side of the baking shell 401. The two support rails 408 are respectively longitudinally fixed on the longitudinal rods of the two L-shaped support frames 407, and the two support slide rails 409 are respectively slidably installed on the two support rails 408. The strip-shaped air box 406 is laterally fixed on the two support slide rails 409 on the corresponding side, and an adjustment drive seat 418 is provided on the bottom of the strip-shaped air box 406. The side adjustment screw 410 is threadedly screwed onto the adjustment drive seat 418, and the side adjustment screw 410 extends through and out of the baking shell 401. The side adjustment handle 411 is fixed to the extended end of the side adjustment screw 410. By utilizing the sliding engagement between the support slide rail 409 and the support track 408, the strip bellows 406 can be smoothly slidably installed; by utilizing the engagement between the side adjusting screw 410 and the adjusting drive seat 418, the strip bellows 406 can be slidably driven.

[0068] Furthermore, the air supply mechanism includes a main air supply pipe 403, two branch air supply pipes 404, and two connecting air supply pipes 405. The main air supply pipe 403 is longitudinally positioned on the inner top of the baking shell 401, and the air outlet of the hot air blower 402 is connected to the middle of the main air supply pipe 403. The two branch air supply pipes 404 are movably inserted into both ends of the main air supply pipe 403. The upper ends of the two connecting air supply pipes 405 are connected to the outer ends of the two branch air supply pipes 404, and the lower ends of the two connecting air supply pipes 405 are connected to the tops of the two strip-shaped air boxes 406. The insertion and cooperation of the main air supply pipe 403 and the two branch air supply pipes 404 facilitates linkage with the two strip-shaped air boxes 406 during spacing adjustment.

[0069] Furthermore, the return air mechanism includes a return air box 412 and an air filter 413; the return air box 412 is fixedly installed on the bottom of the baking shell 401, and a top return air vent is provided on the top of the return air box 412; the air filter 413 is detachably installed on the top return air vent; the return air duct 415 is connected to the return air box 412. The air filter 413 can enhance the cleanliness of the circulating hot air.

[0070] The suspended chain workpiece coating system disclosed in this invention is equipped with a corresponding control cabinet during installation and use. This control cabinet coordinates and controls the operation of the suspended chain device 1, spraying device 2, impregnation device 3, and various baking devices 4. The control cabinet typically includes a main controller and a memory, keypad, display screen, and drive circuits for various motors in each device that are electrically connected to the main controller. Thus, the main controller drives and controls each motor to achieve continuous operation of the system. The hardware components and software configuration of the control cabinet can be combined using existing technologies and are not the innovation of this invention.

[0071] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A suspended chain workpiece coating system, characterized in that: The system includes a suspension chain device (1), a spraying device (2), a coating device (3), and at least two baking devices (4). The suspension chain device (1) includes a chain conveyor mechanism, two workpiece lifting mechanisms, and multiple suspension mechanisms. Each suspension mechanism is installed intermittently on the chain conveyor mechanism and is moved by the chain conveyor mechanism. The suspension mechanisms are used to suspend workpieces (100). The two workpiece lifting mechanisms are respectively set on the loading side and the unloading side of the chain conveyor mechanism and are used to lift workpieces (100) during loading and unloading. Lifting and lifting; the spraying device (2), the dipping device (3) and each baking device (4) are all distributed along the chain conveyor mechanism, and at least one baking device (4) is set between the spraying device (2) and the dipping device (3), and at least one baking device (4) is set between the dipping device (3) and the unloading side. The baking device (4) bakes the workpiece (100) with hot air, the spraying device (2) washes and cleans the workpiece (100), and the dipping device (3) dips the workpiece (100) in paint. The immersion coating device (3) includes an immersion tank (301), an entry guide chute (306), an exit guide chute (302), an entry guide mechanism, and a paint control mechanism; the entry guide chute (306) and the exit guide chute (302) are respectively connected to the workpiece entry side and the workpiece exit side of the immersion tank (301), and the openings of the entry guide chute (306), the immersion tank (301), and the exit guide chute (302) all face upwards; a chain conveyor mechanism spans above the entry guide chute (306), the immersion tank (301), and the exit guide chute (302), and the chain conveyor mechanism is on the entry guide chute (306) The height of the workpiece gradually decreases, remains horizontal above the immersion tank (301), and gradually increases above the exit guide chute (302); the entry guide mechanism is installed above the entry guide chute (306) to guide and limit the workpiece (100), so that the workpiece (100) is stably transported into the entry guide chute (306); the paint control mechanism is installed in the exit guide chute (302) to vibrate and control the paint on the workpiece (100) after it passes through the exit guide chute (302), so that the excess paint on the surface of the workpiece (100) falls back into the exit guide chute (302) and then flows back into the immersion tank (301); The paint control mechanism includes a brace drive motor (321), a vibrator (318), a swing drive rod (327), a rotating sleeve (328), and a support base mechanism. The support base mechanism is fixedly installed on the bottom of the groove away from the guide sloping groove (302). A swing support seat (320) is provided on the support base mechanism, and a swing support shaft (325) is horizontally and rotatably installed on the swing support seat (320). The lower end of the swing drive rod (327) is vertically fixed to the middle of the swing support shaft (325), and the rotating sleeve (328) is rotatably installed on the swing drive rod (327). The brace drive motor (321) is installed on the support base mechanism and drives the swing support shaft (325) to rotate through the swing worm gear mechanism. The vibrator (318) is fixedly installed on the support base mechanism.

2. The suspended chain workpiece coating system according to claim 1, characterized in that: The chain conveyor mechanism includes a chain support unit, a conveyor chain (104), a chain drive unit, a chain tensioning unit, and various suspension nodes; each suspension node is movably installed on the chain support unit, and the conveyor chain (104) is loop-mounted on each suspension node; the chain drive unit is installed on the chain support unit and is used to drive the conveyor chain (104) to drag each suspension node to move; the chain tensioning unit is installed on the chain drive unit and is used to press and tension the conveyor chain (104); each suspension mechanism is suspended on each suspension node, and the workpiece (100) is suspended by the hook (130) of the suspension mechanism; each conical support seat (131) is distributed on the inner wall of the hook (130); a workpiece support roller (149) is rotatably installed on the upper limit of the conical support seat (131).

3. The suspended chain workpiece coating system according to claim 2, characterized in that: The chain drive unit includes a conveyor drive motor (106), a gearbox (105), a chain drive gear (110), and two support side arms (107). The gearbox (105) is horizontally fixed at the turning point of the chain support unit via the two support side arms (107). The chain drive gear (110) is rotatably mounted on the lower side of the gearbox (105) via a gear drive shaft. The conveyor drive motor (106) drives the gear drive shaft to rotate via a gear transmission unit inside the gearbox (105). The chain drive gear (110) meshes with the conveyor chain (104). The chain tensioning unit is mounted on the support side arms (107) and is used to press the conveyor chain (104) at the corresponding position onto the chain drive gear (110).

4. The suspended chain workpiece coating system according to claim 1, characterized in that: The workpiece lifting mechanism includes a lifting and lowering drive unit, two lifting seats (136), a limiting swing rod (140), a limiting rotating shaft (137), and a reset spring (139). The two lifting seats (136) are both mounted on the lifting and lowering drive unit, which synchronously drives the two lifting seats (136) to move up and down. The limiting rotating shaft (137) is movably mounted through the two lifting seats (136), and a limiting slot (142) is provided on the side of the through position. Two limiting protrusions are provided on the limiting rotating shaft (137). (141) and a limiting ring (138); a reset spring (139) is sleeved on the limiting shaft (137) and elastically supported between the support seat (136) and the limiting ring (138), used to push the limiting shaft (137) to move axially; the lower end of the limiting rocker arm (140) is vertically fixed on the limiting shaft (137), and after the limiting protrusion (141) enters the limiting slot (142), the limiting rocker arm (140) is in a vertical state, used to tilt and block the workpiece (100) supported on the two support seats (136).

5. The suspended chain workpiece coating system according to claim 1, characterized in that: The spray device (2) includes a spray housing (201), a water supply mechanism, and two spray mechanisms at the front and rear. The spray mechanism includes a spacing adjustment unit, a swing drive unit, a conveying main pipe (209), and various spray main pipes (221). Spray inlet and outlet windows (202) are provided on both the left and right sides of the spray housing (201), and the chain conveying mechanism passes through the spray inlet and outlet windows (202) on the left and right sides of the spray housing (201). The conveying main pipes (209) of the two spray mechanisms are installed laterally on the front and rear sides inside the spray housing (201) through the spacing adjustment unit. The spacing between the two conveying main pipes (209) is adjusted by the spacing adjustment unit; the water supply mechanism is connected to the two conveying main pipes (209) respectively; the spraying main pipe (221) is vertically and rotatably installed on the conveying main pipe (209), and a connecting hole is provided on the pipe wall of the spraying main pipe (221) inside the conveying main pipe (209); the swing drive unit is installed on the conveying main pipe (209) to synchronously drive the rotation of each spraying main pipe (221) on the same side; each spray head unit for uniform spraying is provided in a spaced manner on the spraying main pipe (221).

6. The suspended chain workpiece coating system according to claim 1, characterized in that: The guide mechanism includes two guide brackets; each guide bracket includes a height adjustment tube (307), an L-shaped support rod (309), an entry guide rod (313), two spacing adjustment screws (311), and two vertical support rods (312); the two height adjustment tubes (307) of the two guide brackets are both vertically arranged on the paint immersion tank (301), and are located on the front and rear sides of the entry guide inclined groove (306), respectively; one end of the L-shaped support rod (309) is inserted into the height adjustment tube (307) and locked and positioned by a height locking bolt (308); the two... The spacing adjustment screws (311) are all horizontally installed on the horizontal bar of the L-shaped bracket rod (309) and clamped and locked by two spacing positioning nuts (310); two vertical support rods (312) are respectively vertically fixed on the ends of the two spacing adjustment screws (311), and the guide rod (313) is horizontally fixed on the upper end of the two vertical support rods (312), and a bent guide rod (330) is provided on the end of the guide rod (313); the bent guide rods (330) of the two guide brackets are distributed in a figure-eight shape on the entry side of the workpiece (100).

7. The suspended chain workpiece coating system according to claim 1, characterized in that: The baking device (4) includes a baking shell (401), a hot air blower (402), two strip-shaped air boxes (406), an air supply mechanism, a return air mechanism, a side distance adjustment mechanism, and an air outlet size adjustment mechanism; a baking inlet / outlet window (414) is provided on both the left and right sides of the baking shell (401), and the chain conveyor mechanism passes through the baking shell (401) through the two baking inlet / outlet windows (414); the two strip-shaped air boxes (406) are installed on the front and rear sides inside the baking shell (401) through the side distance adjustment mechanism, and the distance between the two strip-shaped air boxes (406) is adjusted by the side distance adjustment mechanism. Air outlet windows are provided on the opposite sides of the two strip-shaped air boxes (406) for blowing baking hot air onto the conveyed workpiece (100); the air supply mechanism is installed on the inner top of the baking shell (401) for supplying baking hot air to the two strip-shaped air boxes (406); the air outlet size adjustment mechanism is used to adjust the size of the air outlet windows of the two strip-shaped air boxes (406); the return air mechanism is installed on the inner bottom of the baking shell (401) and is connected to the air inlet of the hot air blower (402) through the return air duct (415); the air outlet of the hot air blower (402) is connected to the air supply mechanism.

8. The suspended chain workpiece coating system according to claim 7, characterized in that: The air outlet size adjustment mechanism includes two upper wind deflectors (430), two lower wind deflectors (416), and two suspension adjustment units. Snap-on strips (417) are vertically installed on both sides of the air outlet window. The two upper wind deflectors (430) are inserted downwards from the upper side of the two strip-shaped air boxes (406) into the upper part of the snap-on grooves of the left and right snap-on strips (417). The two lower wind deflectors (416) are inserted upwards from the lower side of the two strip-shaped air boxes (406) into the lower part of the snap-on grooves of the left and right snap-on strips (417). The suspension adjustment unit includes two suspension support shafts (424), four columnar gears (426), two synchronous gears (421), a synchronous chain (422), four suspension rods (419), four adjusting racks (420), and four adjusting seats (423). The two suspension support shafts (424) are longitudinally rotatably mounted on the upper part of the baking shell (401), and the end of one suspension support shaft (424) extends out of the baking shell (401), and an adjusting worm gear mechanism for rotational adjustment is provided on the extended end; the four columnar gears (426) are coaxially fixedly mounted on the two suspension support shafts (424) in pairs; the adjusting seats (423) are provided with vertically penetrating suspension rod through holes and longitudinally penetrating columnar gear through holes (426, 427, 428, 429, 420, 421, 422, 423, 419, 420, 421, 422, 423, 424, 426, 427, 428, 429, 421, 42 ...9, 421, 422, 421, 422, 423, 421, 422, 423, 424, 426, 427, 428, 429, 421, 422, 421, 422, 421, 422, 421, 422, 421, 422, 421, 422, 421, 4 5), and the through hole of the suspension rod is connected to the through hole of the spur gear (425); the four adjusting seats (423) are sleeved on the four spur gears (426) through their respective through holes of the spur gears (425); the four adjusting racks (420) are respectively vertically fixed on the upper ends of the four suspension rods (419), and the four adjusting racks (420) together with the corresponding four suspension rods (419) are respectively vertically inserted into the four suspension rod through holes of the four adjusting seats (423); the four adjusting racks (420) mesh with the spur gears (426) at the corresponding positions; the two synchronous gears (421) are respectively coaxially fixed on the two suspension support shafts (424), and the synchronous chain (422) surrounds the two synchronous gears (421) to achieve synchronous transmission; The lower ends of the four suspension rods (419) of one suspension adjustment unit are fixed to the lower wind deflector (416) on the corresponding side in pairs, and the lower ends of the four suspension rods (419) of the other suspension adjustment unit are fixed to the upper wind deflector (430) on the corresponding side in pairs; the axial positions of the synchronous gears (421) of the two suspension adjustment units on the suspension support shaft (424) are staggered, and the installation positions of the suspension support shaft (424) of the two suspension adjustment units are staggered.

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