CN111570132A - Paint spraying system of annular product - Google Patents

Abstract

The invention discloses a paint spraying system for annular products, which belongs to the technical field of surface painting of annular products. A paint spraying system for annular products comprises a feeding area, a first paint spraying table, a turning device, The second paint spraying table, the baking box, and the unloading area, the hanging conveying line is a closed-loop conveying line, and there are several hangers suspended at intervals on the hanging conveying line, and the several hangers are conveyed in sequence along the conveying direction of the hanging conveying line. The table and the second paint spraying table are respectively provided with a paint spraying device. The paint spraying system for annular products of the invention completes a series of actions of loading, painting, surface changing, drying and unloading on a closed-loop hanging conveying line, without the need for manual surface changing and feeding into the baking box, effectively avoiding manual pollution, And greatly improve the efficiency of painting, paint evenly.

Description

A paint spraying system for annular products

technical field

The invention belongs to the technical field of surface painting of annular products, and particularly relates to a painting system for annular products.

Background technique

In modern industry, especially in machinery manufacturing, spray paint is widely used. For various ring-shaped products such as bicycle wheels, traditional spray painting includes manual spraying, robot spraying, and automatic spraying on a rotary table. The uniformity of manual spraying is uncontrollable and the effect is not good. Robotic spraying efficiency is slow and equipment costs are high. The rotary table spraying efficiency is low, and it needs to be manually sent to the baking oven for drying, which is easy to cause the problem of artificial pollution, requires relatively high technical operation of personnel, and is time-consuming and labor-intensive.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a paint spraying system for annular products, which completes a series of actions of loading, painting, surface changing, drying and unloading on a closed-loop hanging conveying line, without the need for manual surface changing and feeding into the oven, Effectively avoid artificial pollution, and greatly improve the efficiency of painting, paint evenly.

For this purpose, the present invention adopts the following technical solutions:

A paint spraying system for annular products provided by the present invention includes a feeding area, a first paint spraying table, a turning device, a second paint spraying table, a baking box, and an unloading area, which are sequentially arranged along the conveying direction of the hanging conveying line. The line is a closed-loop conveyor line. Several hangers are suspended on the suspension conveyor line at intervals. Several hangers are transported in turn along the conveying direction of the hanging conveyor line. The first spray booth and the second spray booth are respectively provided with a paint spraying device.

Preferably, guide devices are provided on the hanging conveying lines at the first and second spray booths.

Preferably, the painting equipment includes a first linear sliding table, a lifting table, and a rotating spray gun assembly, the moving direction of the first linear sliding table is parallel to the conveying direction of the hanging conveying line, and the lifting table is fixed on the first linear sliding table. On the sliding end, the rotating spray gun assembly is fixed on the lifting end of the lifting platform, and the paint spraying end of the rotating spray gun assembly is arranged toward the hanging conveying line.

Preferably, the rotary spray gun assembly includes a second linear sliding table, a first bearing seat, a rotating shaft, a rotating driving member, a first mounting seat, two sets of moving modules, a first adjusting guide rod, a second adjusting guide rod, and a vertical rod , the first adjustment block used to adjust the first adjustment guide rod forward and backward, the second adjustment block used to adjust the second adjustment guide rod left and right, the first spray gun, the second spray gun, and the third spray gun, the second linear slide table The moving direction is perpendicular to the conveying direction of the hanging conveying line, the sliding end of the second linear slide table is fixed with a first bearing seat and a rotating driving member, one end of the rotating shaft is fixed with a first mounting seat, and the other end of the rotating shaft passes through the first bearing seat and the rotating drive member. Bearing seat, the rotating shaft is rotatably matched with the first bearing seat, the rotating shaft is driven by the rotating driving element, the first mounting seat is fixed with two groups of moving modules, and the first adjusting block is arranged on the moving end of one of the moving modules , the first adjustment guide rod passes through the first adjustment block, the first spray gun is adjustable and arranged on the first adjustment guide rod, the second adjustment block is arranged above the first adjustment block, and the second adjustment guide rod passes through the second adjustment guide Block, the second spray gun can be adjusted on the second adjustment guide rod, the vertical rod is fixed on the moving end of another group of moving modules, the third spray gun can be adjusted on the vertical rod, the first spray gun is located between the second spray gun and the Between the third spray gun.

Preferably, the first spray gun, the second spray gun and the third spray gun are all provided with through holes, one end of the first adjustment guide rod and the second adjustment guide rod have a vertical part, and the vertical part of the first adjustment guide rod passes through The vertical part of the second adjusting guide rod passes through the through hole of the second spray gun and is fixed by bolts, and the vertical rod passes through the through hole of the third spray gun and is fixed by bolts.

Preferably, the rotary driving member includes a second mounting seat, a first servo motor, a first synchronizing wheel, and a first timing belt, the first servo motor is fixed on the second mounting seat, and the output shaft and the rotating shaft of the first servo motor are Both are provided with a first synchronous wheel and are connected by a first synchronous belt.

Preferably, the end of the rotating shaft away from the first mounting seat is provided with a rotating joint, the interior of the rotating shaft is hollow and has wire holes on both sides, and the wire holes are arranged close to the first mounting seat.

Preferably, the first linear slide table includes a frame, a linear guide rail, a linear slider, a second servo motor, a reduction box, a second bearing seat, a second synchronizing wheel, a second synchronizing belt, a third bearing seat, and a shaft core. , tensioning wheel, and adjusting plate, a linear guide rail is fixed on the frame, a linear slider is slidably connected to the linear guide rail, and one end of the frame is fixed with a second servo motor, a reduction box and a second bearing seat, the second servo motor It is connected with the reduction box, the output shaft of the reduction box passes through the second bearing seat and is fixed with the second synchronizing wheel, the other end of the frame is provided with an adjustment plate, one side of the adjustment plate is fixed with a third bearing seat, and the end of the shaft core is The tensioning wheel is fixed on the shaft core, and the tensioning wheel and the second synchronous wheel are connected by a second synchronous belt, and the second synchronous belt is connected with the linear slider.

Preferably, limit switches are provided on both the left and right sides of the linear guide rail.

Preferably, protective plates are fixed on both front and rear sides of the lower part of the lifting platform.

The beneficial effects of the present invention are:

1. A series of actions of loading, painting, surface changing, drying and unloading are completed on the closed-loop hanging conveyor line, without manual surface changing and feeding into the oven, which effectively avoids manual pollution and greatly improves the efficiency of painting.

2. Multiple hangers are set at intervals to further improve the painting efficiency and reduce labor costs. Only simple loading and unloading operations are required, and the technical requirements for personnel are low.

3. Through the setting of the first linear slide table, the paint can be sprayed synchronously with the ring-shaped product. The lift table can adjust the height of the rotating spray gun assembly according to the actual needs.

4. It can spray paint from multiple angles on annular products, and adjust the positions of the first spray gun, the second spray gun and the third spray gun according to the needs. It is suitable for spray painting operations of different specifications, with high flexibility and easy operation.

Description of drawings

FIG. 1 is a schematic top view of the structure of the present invention.

FIG. 2 is a schematic three-dimensional structure diagram of the paint spraying equipment of the present invention.

FIG. 3 is a schematic three-dimensional structure diagram of the rotary spray gun assembly of the present invention.

4 is a schematic three-dimensional structure diagram of the second spray gun of the present invention.

FIG. 5 is a schematic cross-sectional view of the rotating shaft of the present invention.

FIG. 6 is an enlarged schematic view of A in FIG. 2 .

FIG. 7 is a schematic front view of the linear slider and the second timing belt of the present invention.

FIG. 8 is an enlarged schematic view of B in FIG. 2 .

FIG. 9 is a schematic view of the front structure of the hanger of the present invention.

The signs in the drawings are: 1-hanging conveyor line, 2-feeding area, 3-first spraying table, 4-turning device, 5-second spraying table, 6-baking box, 7-discharging area, 8-hanging tool, 9-painting equipment, 91-first linear slide table, 911-frame, 912-linear guide rail, 913-linear slider, 914-second servo motor, 915-reduction box, 916-first Second bearing seat, 917-second synchronous wheel, 918-second synchronous belt, 919-third bearing seat, 9110-shaft core, 9111-tensioner, 9112-adjustment plate, 9113-limit switch, 92-lifting Table, 93-Rotary Gun Assembly, 931-Second Linear Slide, 932-First Bearing Block, 933-Rotary Shaft, 934-Rotary Drive, 9341-Second Mounting Base, 9342-First Servo Motor, 9343- 1st synchronizing wheel, 9344-1st synchronizing belt, 935-1st mounting seat, 936-moving module, 937-1st adjusting rod, 938-2nd adjusting rod, 939-vertical rod, 9310-1st Adjustment Block, 9311-Second Adjustment Block, 9312-First Gun, 9313-Second Gun, 9314-Third Gun, 9315-Through Hole, 9316-Vertical, 9317-Rotary Joint, 9318-Line Hole, 10 - Guides, 11 - Guards.

Detailed ways

The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

Contents not described in detail in this specification belong to the prior art known to those skilled in the art. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention. The invention and simplified description do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

As shown in FIGS. 1 to 9 , a paint spraying system for annular products provided in this embodiment includes a feeding area 2 , a first paint spraying table 3 , a turning device 4 , a first paint spraying table 3 , a turning device 4 , a feeding area 2 , a first paint spraying table 3 , a second The second paint spraying table 5, the baking box 6, and the unloading area 7, the hanging conveying line 1 is a closed-loop conveying line, and there is a certain distance between the baking box 6 and the unloading area 7, so that the baked annular product can be It is cooled during the conveying process. Several hangers 8 are suspended at equal intervals on the hanging conveying line 1, and the several hangings 8 are conveyed in turn along the conveying direction of the hanging conveying line 1. The first spraying table 3 and the second spraying table 5 are respectively set corresponding There is a painting equipment 9. It is circulated and conveyed on the hanging conveying line 1 through the hanger 8 and enters each work area, which greatly improves the painting efficiency. In the loading area 2, the annular product is loaded into the hanger 8, and is transported to the first painting table 3 through the hanging conveying line 1. When the annular product enters the area of the first painting table 3, the painting equipment 9 on the front side of the first painting table 3 The spraying end follows the conveying direction of the annular product and synchronously sprays paint on one side of the annular product. After the painting operation is completed, the painting end of the painting equipment 9 is reset. When the annular product enters the area of the second painting station 5, the painting end of the painting equipment 9 on the front side of the second painting station 5 follows the conveying direction of the annular product and synchronously paints the other side of the annular product. , after the painting operation is completed, the painting end of the painting equipment 9 is reset, so that the completed annular product is double-sided painting, and then the annular product is transported to the baking oven 6 for baking, and dried at a preset temperature for a period of time without manual turning and heating. The ring-shaped product is sent to the baking box 6 to avoid artificial pollution. The ring-shaped product after baking in the baking box 6 is sent to the unloading area 7 for unloading, and the ring-shaped product is unloaded and put into the carriage. The hanger 8 completes a Circulating and setting up multiple hangers 8 at intervals can greatly improve the efficiency of painting and reduce labor costs. Only simple loading and unloading operations are required, and the requirements for personnel and technical operations are low.

Further, a guide device 10 is provided on the hanging conveying line 1 at the first paint spraying station 3 and the second paint spraying station 5, and the guide device 10 is guided to ensure effective painting and painting uniformity.

Further, the painting equipment 9 includes a first linear sliding table 91, a lifting table 92, and a rotating spray gun assembly 93. The moving direction of the first linear sliding table 91 is parallel to the conveying direction of the hanging conveying line 1, and the lifting table 92 is fixed on the On the sliding end of the first linear slide table 91 , the rotating spray gun assembly 93 is fixed on the lifting end of the lifting platform 92 , and the paint spraying end of the rotating spray gun assembly 93 is disposed toward the hanging conveying line 1 . Through the setting of the first linear slide table 91, the synchronous painting following the annular product is realized. The lift table 92 can adjust the height of the rotating spray gun assembly according to actual needs. Rotary painting is carried out by rotating the spray gun to achieve uniform painting of annular products and greatly improve the painting efficiency. The sliding speed of the first linear sliding table 91 is consistent with the conveying speed of the hanging conveying line 1 and can be preset and regulated by the PLC controller.

Further, the rotary spray gun assembly 93 includes a second linear sliding table 931, a first bearing seat 932, a rotating shaft 933, a rotating driving member 934, a first mounting seat 935, two sets of moving modules 936, a first adjusting guide rod 937, The second adjusting guide rod 938, the vertical rod 939, the first adjusting block 9310 for adjusting the first adjusting guide rod 937 back and forth, the second adjusting block 9311 for adjusting the second adjusting guide rod 938 left and right, the first spray gun 9312, In the second spray gun 9313 and the third spray gun 9314, the movement direction of the second linear slide table 931 is perpendicular to the conveying direction of the hanging conveying line 1. In this embodiment, the movement direction of the second linear slide table 931 is forward and backward movement. The sliding end of the sliding table 931 is fixed with the first bearing seat 932 and the rotation driving member 934, the rear end of the rotating shaft 933 is fixed with the first mounting seat 935, the front end of the rotating shaft 933 passes through the first bearing seat 932, and the rotating shaft 933 is connected to the first bearing seat 932. The first bearing seat 932 is rotatably matched, the rotating shaft 933 is driven by the rotary driving member 934, two sets of moving modules 936 are fixed on the first mounting seat 935, and are driven by a stepping motor, and the first adjusting block 9310 is arranged on the right side thereof. On the moving end of the moving module 936, the first adjustment guide rod 937 passes through the first adjustment block 9310, the first spray gun 9312 can be adjusted and arranged on the first adjustment guide rod 937, and the second adjustment block 9311 is arranged on the first adjustment block 9311. Above the block 9310, the second adjustment guide rod 938 passes through the second adjustment block 9311, the second spray gun 9313 can be adjusted on the second adjustment guide rod 938, and the vertical rod 939 is fixed on the left side of the moving module 936. At the end, the third spray gun 9314 is adjustable and arranged on the vertical rod 939, and the first spray gun 9312 is located between the second spray gun 9313 and the third spray gun 9314. The distance between the first mounting seat 935 and its upper structure and the annular product is adjusted through the second linear sliding table 931 . The rotating shaft 933 is driven to rotate by the rotating driving member 934, thereby driving the first mounting seat 935 and its upper structure to rotate, so as to realize the rotating painting operation. The first spray gun 9312 and the second spray gun 9313 are moved left and right by the moving module 936 on the right side to adjust the positions of the first spray gun 9312 and the second spray gun 9313, and the third spray gun 9314 is driven by the moving module 936 on the left side Move left and right to adjust the position of the third spray gun 9314. Through the cooperation of the first adjustment guide rod 937 and the first adjustment block 9310, the front and rear positions of the first spray gun 9312 can be fine-tuned, and through the cooperation of the second adjustment guide rod 938 and the second adjustment block 9311, the left and right of the second spray gun 9313 Position, the setting of the vertical rod 939 enables the third spray gun 9314 to be adjusted up and down, and is fixed by bolts after adjustment. In this way, multi-angle spray painting can be performed on annular products, and it is suitable for spray painting operations of different specifications, with high flexibility and easy operation.

Specifically, the first spray gun 9312, the second spray gun 9313 and the third spray gun 9314 are all provided with through holes 9315, and one end of the first adjustment guide rod 937 and the second adjustment guide rod 938 has a vertical portion 9316, the first adjustment guide rod 9316. The vertical part 9316 of the guide rod 937 passes through the through hole 9315 of the first spray gun 9312 and is fixed by bolts, and the vertical part 9316 of the second adjustment guide rod 938 passes through the through hole 9315 of the second spray gun 9313 and is fixed by bolts. The rod 939 is passed through the through hole 9315 of the third spray gun 9314 and fixed by bolts. The vertical portion 9316 is provided for installing the first spray gun 9312 and the second spray gun 9313, and also for adjusting the heights of the first spray gun 9312 and the second spray gun 9313, which are fixed by bolts after adjustment.

Further, the rotary drive member 934 includes a second mounting seat 9341, a first servo motor 9342, a first synchronizing wheel 9343, and a first timing belt 9344. The first servo motor 9342 is fixed on the second mounting seat 9341, and the first servo motor The output shaft of the 9342 and the rotating shaft 933 are both provided with a first synchronous wheel 9343 and are connected by a first synchronous belt 9344. The rotation of the first servo motor 9342 drives the first synchronization wheel 9343 on the output shaft of the first servo motor 9342 to rotate, and the first synchronization belt 9344 drives the first synchronization wheel 9343 on the rotating shaft 933 to rotate synchronously, thereby driving the rotating shaft 933 Rotate to achieve a rotating action.

Further, the rotary shaft 933 is provided with a rotary joint 9317 for air intake, paint feeding, electricity feeding, etc. away from the front end, the rotary shaft 933 is hollow inside and has wire holes 9318 on both sides, and the wire holes 9318 are set close to the first mounting seat 935, The hole 9318 facilitates the passage of air pipes, oil pipes, control wires, etc. This design avoids the entanglement of air pipes, paint pipes, control wires, etc.

Further, the first linear slide table 91 includes a frame 911, a linear guide rail 912, a linear slider 913, a second servo motor 914, a reduction box 915, a second bearing seat 916, a second synchronous wheel 917, and a second synchronous belt 918, the third bearing seat 919, the shaft core 9110, the tensioning wheel 9111, and the adjusting plate 9112, a linear guide 912 is fixed on the frame 911, and a linear slider 913 is slidably connected to the linear guide 912. A right end of the frame 911 A second servo motor 914, a reduction box 915 and a second bearing seat 916 are fixed. The second servo motor 914 is connected to the reduction box 915. The output shaft of the reduction box 915 passes through the second bearing seat 916 and is fixed with a second synchronizing wheel 917. , the left end of the frame 911 is provided with an adjusting plate 9112, the right side of the adjusting plate 9112 is fixed with a third bearing seat 919, the end of the shaft core 9110 is set in the third bearing seat 919, and the tensioning pulley 9111 is fixed on the shaft core 9110 Above, the tensioning pulley 9111 and the second synchronizing pulley 917 are connected by a second timing belt 918, the second timing belt 918 is connected with the linear slider 913, and the tensioning pulley 9111 is of a nested type. Through the forward and reverse rotation of the second servo motor 914, the second synchronizing wheel 917 is driven to rotate forward and reverse, so that the second synchronous belt moves, and then drives the linear slider 913 to slide left and right on the linear guide 912 to realize the follow and reset of the paint spraying end. By adjusting the adjusting plate 9112, the position of the tensioning wheel 9111 can be adjusted, thereby adjusting the tightness. Specifically, both the adjustment plate 9112 and the frame 911 are provided with adjustment holes, which are fixed by bolts after adjustment.

Further, limit switches 9113 are provided on the left and right sides of the linear guide rail 912 , and the setting of the limit switches 9113 can prevent the machine from colliding and damage the accessories of the machine, thereby ensuring safety.

Further, the front and rear sides of the lower part of the lifting platform 92 are fixed with protective plates 11 , and the arrangement of the protective plates 11 further improves the safety.

The control method of the present invention is automatically controlled by a PLC controller. According to different types of workpieces, the preset data is stored in the PLC controller, and the parameters of workpieces of different specifications can be automatically transferred to realize automatic painting. The control circuit can be realized by simple programming by those skilled in the art, which belongs to the common knowledge in the art, and the present invention is mainly used to protect the mechanical device, so the present invention will not explain the control method and circuit connection in detail.

The present invention achieves the combination technology of the painting equipment 9 and the hanging conveying line 1 following the painting automatically. A continuous loop system is formed by the closed-loop hanging conveying line 1, hanger 8, painting equipment 9, etc., so as to realize all processes such as feeding, automatic turning of workpieces, painting, drying, discharging and returning, etc. The automation procedure is high, the process is simple, and the Good performance. Thereby, the production efficiency is greatly improved, the cost is reduced, the energy consumption is saved, and the labor intensity is reduced.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand; The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A paint spraying system for annular products, characterized in that:

the device comprises a feeding area, a first paint spraying table, a turnover device, a second paint spraying table, a baking box and a discharging area which are sequentially arranged along the conveying direction of a suspension conveying line;

the hanging conveying line is a closed-loop conveying line, a plurality of hangers are hung on the hanging conveying line at intervals, and the hangers are conveyed in sequence along the conveying direction of the hanging conveying line;

and the first paint spraying table and the second paint spraying table are respectively and correspondingly provided with a paint spraying device.

2. Paint spraying system for annular products according to claim 1, characterized in that:

and the suspension conveying line at the first paint spraying table and the second paint spraying table is provided with a guide device.

3. Paint spraying system for annular products according to claim 1, characterized in that:

the paint spraying equipment comprises a first linear sliding table, a lifting table and a rotary spray gun assembly;

the moving direction of the first linear sliding table is parallel to the conveying direction of the suspension conveying line;

the lifting table is fixed on the sliding end of the first linear sliding table;

the rotary spray gun assembly is fixed to the lifting end of the lifting platform, and the paint spraying end of the rotary spray gun assembly faces the suspension conveying line.

4. Painting system of annular products according to claim 3, characterized in that:

the rotary spray gun assembly comprises a second linear sliding table, a first bearing seat, a rotating shaft, a rotary driving piece, a first mounting seat, two groups of moving modules, a first adjusting guide rod, a second adjusting guide rod, a vertical rod, a first adjusting block for adjusting the first adjusting guide rod forwards and backwards, a second adjusting block for adjusting the second adjusting guide rod leftwards and rightwards, a first spray gun, a second spray gun and a third spray gun;

the motion direction of the second linear sliding table is perpendicular to the conveying direction of the suspension conveying line;

a first bearing seat and a rotary driving piece are fixed at the sliding end of the second linear sliding table;

a first mounting seat is fixed at one end of the rotating shaft, the other end of the rotating shaft penetrates through the first bearing seat, the rotating shaft is in running fit with the first bearing seat, and the rotating shaft is driven by the rotary driving piece;

two groups of moving modules are fixed on the first mounting seat;

the first adjusting block is arranged at the moving end of one group of the moving modules, the first adjusting guide rod penetrates through the first adjusting block, and the first spray gun is adjustably arranged on the first adjusting guide rod;

the second adjusting block is arranged above the first adjusting block, the second adjusting guide rod penetrates through the second adjusting block, and the second spray gun is adjustably arranged on the second adjusting guide rod;

the vertical rod is fixed on the moving end of the other group of the moving modules, and the third spray gun is arranged on the vertical rod in an adjustable manner;

the first lance is located between the second lance and the third lance.

5. Paint spraying system for annular products according to claim 4, characterized in that:

the first spray gun, the second spray gun and the third spray gun are all provided with through holes;

one end of each of the first adjusting guide rod and the second adjusting guide rod is provided with a vertical part, the vertical part of the first adjusting guide rod penetrates through the through hole of the first spray gun and is fixed through a bolt, and the vertical part of the second adjusting guide rod penetrates through the through hole of the second spray gun and is fixed through a bolt;

the vertical rod penetrates through the through hole of the third spray gun and is fixed through a bolt.

6. Paint spraying system for annular products according to claim 4, characterized in that:

the rotary driving piece comprises a second mounting seat, a first servo motor, a first synchronous wheel and a first synchronous belt;

the first servo motor is fixed on the second mounting seat, and an output shaft and a rotating shaft of the first servo motor are both provided with a first synchronous wheel and are in transmission connection through a first synchronous belt.

7. Paint spraying system for annular products according to claim 4, characterized in that:

a rotary joint is arranged at one end of the rotary shaft, which is far away from the first mounting seat;

the rotating shaft is hollow inside, wire holes are formed in two sides of the rotating shaft, and the wire holes are close to the first mounting seat.

8. Painting system of annular products according to claim 3, characterized in that:

the first linear sliding table comprises a rack, a linear guide rail, a linear sliding block, a second servo motor, a reduction gearbox, a second bearing seat, a second synchronous wheel, a second synchronous belt, a third bearing seat, a shaft core, a tension wheel and an adjusting plate;

a linear guide rail is fixed on the rack, and a linear sliding block is connected on the linear guide rail in a sliding manner;

a second servo motor, a reduction gearbox and a second bearing seat are fixed at one end of the rack, the second servo motor is connected with the reduction gearbox, and an output shaft of the reduction gearbox penetrates through the second bearing seat and is fixed with a second synchronizing wheel;

an adjusting plate is arranged at the other end of the rack, a third bearing seat is fixed on one side of the adjusting plate, the end part of the shaft core is arranged in the third bearing seat, the tensioning wheel is fixed on the shaft core, and the tensioning wheel and the second synchronous wheel are in transmission connection through a second synchronous belt;

and the second synchronous belt is connected with the linear sliding block.

9. Paint spraying system for annular products according to claim 8, characterized in that:

and the left side and the right side of the linear guide rail are both provided with limit switches.

10. Paint spraying system for annular products according to claim 8, characterized in that:

and the front side and the rear side of the lower part of the lifting platform are both fixed with protective plates.

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