Universal paint spraying line for brake drum and brake disc

Abstract

The utility model discloses a universal paint spraying line for a brake drum and a brake disc, relates to the technical field of paint spraying production lines, and solves the problem of insufficient space utilization rate of a paint spraying line in the prior art. The paint spraying device comprises a paint spraying chamber, an inlet and an outlet of the paint spraying chamber are connected with a workpiece feeding conveying belt and a workpiece discharging conveying belt respectively, the workpiece discharging conveying belt is connected with a lower-layer inlet of a double-layer drying system, an elevator is arranged on the double-layer drying system, and an upper-layer outlet of the double-layer drying system is connected with a transfer conveying belt. And the transfer conveying belt is matched with the cooling system. The double-layer drying system connected with the part discharging conveying belt is arranged, the drying function is achieved, the double-layer drying system is matched with the elevator, the drying space can be fully utilized, the occupied space of parts in the drying process is reduced, and the space utilization rate is increased; and the workpiece cooling function can be achieved, and the space utilization rate is further increased in cooperation with arrangement of the transfer conveying belt.

Description

Technical Field

[0001] This utility model relates to the technical field of paint spraying production lines, and in particular to a universal paint spraying line for brake drums and brake discs. Background Technology

[0002] In the production of brake drums and brake discs, the painting process is a crucial step, directly impacting product quality, performance, and production efficiency. Traditional painting production lines suffer from numerous shortcomings, severely hindering production development and product quality improvement. In the drying stage, existing post-painting drying methods are inefficient, resulting in slow paint drying and extended production cycles. Furthermore, the lack of uniform and stable heating methods leads to uneven coating drying, frequently resulting in incomplete or over-drying, which not only affects production efficiency but also reduces product yield. Regarding energy utilization, traditional painting production lines generally suffer from significant energy waste. For example, some drying equipment has low thermal efficiency, resulting in substantial waste of heat energy, increasing production costs, and contradicting the modern industrial trend of energy conservation and emission reduction. In addition, the utilization of production space is not entirely rational; many production lines are not designed with space considerations in mind, resulting in large floor areas without a corresponding increase in production efficiency, a problem particularly pronounced in space-constrained production environments. In terms of operational precision and efficiency, traditional manual operation or simple equipment is inaccurate and slow in operations such as lifting workpieces, which cannot meet the needs of continuous high-intensity production and seriously limits the expansion of production scale and the improvement of production efficiency.

[0003] For example, Chinese invention patent CN105642475A discloses a wheel hub cleaning and painting combined production line, which includes independent cleaning lines and painting lines. The cleaning lines and painting lines partially overlap, staggered vertically at the overlap, and share a drying oven outside the overlap. Compared with existing painting production lines, this invention saves a drying oven, reduces procurement costs, lowers production costs, reduces heat loss, and saves energy. At the same time, this invention occupies a smaller area, saving land resources in today's increasingly scarce land resources.

[0004] This invention allows the cleaning line and the painting line to share a single drying oven, which improves space utilization to some extent. However, for a single painting line, it does not achieve the goal of reducing the area occupied.

[0005] In summary, existing brake drum and brake disc painting production lines have many shortcomings in terms of drying efficiency, coating quality, energy utilization, space utilization, operational precision, maintenance convenience, and versatility. There is an urgent need for a new, efficient, and multifunctional painting production line to solve these problems. Utility Model Content

[0006] To address the shortcomings in the aforementioned background technology, this utility model proposes a universal painting line for brake drums and brake discs, which solves the problem of insufficient space utilization in existing painting lines.

[0007] The technical solution of this utility model is implemented as follows: a universal painting line for brake drums and brake discs includes a painting chamber, the inlet and outlet of which are respectively connected to an upper conveyor belt and an exit conveyor belt. The exit conveyor belt is connected to the lower inlet of a double-layer drying system. The double-layer drying system is equipped with an elevator, and the upper outlet of the double-layer drying system is connected to a transfer conveyor belt, which is coordinated with a cooling system.

[0008] Preferably, the double-layer drying system includes a support frame with an upper plate chain and a lower plate chain arranged in parallel on the support frame. One end of the support frame is connected to a hoist. An insulation layer is provided outside the support frame and the hoist. The upper outlet and the lower inlet are located at the other end of the support frame and correspond to the upper plate chain and the lower plate chain, respectively.

[0009] Preferably, the hoist includes a frame, on which an upper support structure and a lower support structure are provided, corresponding to an upper plate chain and a lower plate chain, respectively; a hoisting frame is provided on the frame, and the hoisting frame is connected to a hoisting cylinder provided on the frame, the hoisting cylinder can drive the hoisting frame to move vertically; a linear assembly is provided at the bottom of the frame, and a moving cylinder is provided vertically at the moving end of the linear assembly, and a support plate is provided at the telescopic end of the moving cylinder.

[0010] Preferably, the upper supporting structure includes several rollers mounted on the frame, each roller having a sprocket I at its end, and adjacent sprockets I being connected by chain drive; the frame is provided with a push cylinder, which is horizontally positioned.

[0011] Preferably, the lower supporting structure includes a pair of half-shafts I arranged on both sides of the frame, each half-shaft I having a sprocket II at its end, and adjacent sprockets II being connected by chain drive; the lifting frame has a pair of half-shafts II, with gaps between the half-shafts I and II on both sides, the gaps being used to allow the pallet to move. The frame is equipped with sensors.

[0012] Preferably, the cooling system includes a cooling support, a cooling conveyor belt is provided on the cooling support, and a plurality of cooling fans are arranged sequentially on the cooling support along the conveying direction of the cooling conveyor belt.

[0013] Preferably, the upper conveyor belt, the lower conveyor belt, the upper plate chain, the lower plate chain, and the cooling conveyor belt are all plate chain conveyor belts.

[0014] Preferably, the cooling conveyor belt is inclined, and the transfer conveyor belt is a curved plate chain conveyor. A handling robot is installed at both the end of the cooling system and the front end of the loading conveyor belt.

[0015] The beneficial effects of this utility model are as follows: By setting up an upper conveyor belt and an lower conveyor belt, materials can be fed into and discharged from the painting chamber, realizing the painting process of the workpieces. A double-layer drying system connected to the lower conveyor belt achieves the drying function. The double-layer drying system, in conjunction with the elevator, fully utilizes the drying space, reduces the space occupied by drying process components, and improves space utilization. Simultaneously, a transfer conveyor belt, in conjunction with a cooling system, achieves the cooling function of the workpieces, further improving space utilization. Furthermore, the double-layer drying system can efficiently utilize heat energy, reduce energy waste, and improve drying efficiency. This painting line has high drying efficiency, a reasonable layout, high space utilization, and a reliable production line structure. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the paint spraying line of this utility model;

[0018] Figure 2 This is a schematic diagram of the double-layer drying system of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the elevator and the workpiece of this utility model;

[0020] Figure 4 This is a schematic diagram of the hoist structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the cooling system structure of this utility model;

[0022] Figure 6 This is a schematic diagram of an optional chain plate structure of the present invention;

[0023] In the diagram: 1: Spray booth; 2: Upper conveyor belt; 3: Outgoing conveyor belt; 4: Double-layer drying system; 5: Transfer conveyor belt; 6: Cooling system; 7: Elevator; 41: Support frame; 42: Upper plate chain; 43: Lower plate chain; 45: Insulation layer; 71: Frame; 72: Upper support structure; 73: Lower support structure; 74: Lifting frame; 75: Lifting cylinder; 76: Linear assembly; 77: Moving cylinder; 78: Pallet; 721: Roller; 722: Sprocket I; 79: Push cylinder; 731: Half shaft I; 732: Sprocket II; 741: Half shaft II; 733: Sensor; 61: Cooling support frame; 62: Cooling conveyor belt; 63: Cooling fan; 8: Handling robot. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 As shown in Embodiment 1, a universal painting line for brake drums and brake discs includes a painting chamber 1. The inlet and outlet of the painting chamber 1 are connected to an upper conveyor belt 2 and an exit conveyor belt 3, respectively, so that materials are fed into and discharged from the painting chamber using the upper and exit conveyor belts. The painting chamber is used to perform the painting process on the workpieces. The exit conveyor belt 3 is connected to the lower inlet of a double-layer drying system 4 to achieve the drying function. In this embodiment, the upper outlet and lower inlet of the double-layer drying system are located at the same end. A hoist 7 is provided at the other end of the double-layer drying system 4. When the workpiece is transported to the other end, the hoist lifts the workpiece, thereby making full use of the drying space, reducing the space occupied by the drying process components, and improving the space utilization rate. The upper outlet of the double-layer drying system 4 is connected to a transfer conveyor belt 5, and the transfer conveyor belt 5 cooperates with a cooling system 6 to achieve the cooling function of the workpieces. The layout of the transfer conveyor belt makes the line structure more reasonable and further improves the space utilization rate.

[0026] As a further specific implementation, both the end of the cooling system 6 and the front end of the loading conveyor belt 2 are equipped with handling robots 8, which realize automatic loading and unloading and improve automation capabilities. In order to improve the space utilization in the horizontal direction, in this embodiment, the transfer conveyor belt 5 is a turning plate chain conveyor, making the layout of the entire production line more reasonable.

[0027] In this embodiment, the following process is used for painting:

[0028] 1: First, the handling robot 8 picks up the workpiece from the material placement area, rotates and moves it to the upper conveyor belt 2;

[0029] 2. Set the working frequency of the upper conveyor belt 2;

[0030] 3. A position sensor is installed on the upper conveyor belt 2. The position sensor can be a conventional photoelectric sensor. After sensing that the workpiece is placed on the chain plate of the upper conveyor belt 2, the upper conveyor belt 2 starts to run, moving the workpiece to the spray booth 1 to start spraying.

[0031] 4. After painting, place the workpiece on the output conveyor belt 3. The output conveyor belt 3 will transport the workpiece to the lower inlet of the double-layer drying system 4, allowing the workpiece to enter the double-layer drying system 4.

[0032] 5. Set the conveying frequency and drying temperature of the double-layer drying system 4. Set the temperature to 70-90℃ to dry the painted surface of the workpiece. The double-layer drying system 4 can efficiently utilize heat energy, reduce energy waste, and improve drying efficiency.

[0033] 6. When the workpiece is moved from the double-layer drying system 4 to the other end, the elevator moves the workpiece from the lower layer to the upper layer for re-drying;

[0034] 7. When the workpiece finishes drying, it is output from the upper outlet and enters the transfer conveyor belt 5. The transfer conveyor belt 5 makes a 180° turn to transport the workpiece and it enters the cooling system 6.

[0035] 8. The cooling system 6 cools the workpiece and transports it to the bottom.

[0036] 9. When the workpiece reaches the bottom, the robot picks it up from the cooling system 6, rotates and moves it to the material placement area, completing the task. This painting line boasts high drying efficiency, high space utilization, and a reliable production line structure.

[0037] Example 2: A universal painting line for brake drums and brake discs, such as... Figure 2As shown, based on Embodiment 1, the double-layer drying system 4 includes a support 41, on which an upper plate chain 42 and a lower plate chain 43 are arranged in parallel. One end of the support 41 is connected to the elevator 7. An insulation layer 45 is provided on the outside of the support 41 and the elevator 7, thereby forming a box-shaped insulation structure on the support and the elevator using the insulation layer 45. The upper outlet and the lower inlet are located at the other end of the support 41 and correspond to the upper plate chain 42 and the lower plate chain 43, respectively. The insulation layer has openings corresponding to the upper plate chain and the lower plate chain, which are the upper outlet and the lower inlet, respectively. In addition, a hot air blower is installed at the bottom of the support frame in this embodiment. The hot air blower is connected to the inside of the insulation layer through a pipe, so that it can generate hot air when it is working and introduce the hot air into the double-layer drying system. A temperature sensor is installed on the internal support frame. Both the temperature sensor and the hot air blower are connected to the controller. When the temperature sensor detects that the temperature signal has reached the set value, it feeds back to the controller, which controls the hot air blower to stop working, thereby monitoring the system's operating status, maintaining the temperature range, and avoiding energy waste. Under the effect of the insulation layer, the temperature dissipates slowly, which can continuously dry the paint on the surface of the workpiece. Furthermore, the air outlet of the hot air blower is connected to the internal space formed by the insulation layer from the bottom through a pipe, and the air inlet of the hot air blower is connected to the internal space formed by the insulation layer from the top through a pipe. This makes full use of the principle of heat rising, so that the temperature inside the double-layer drying system 4 is more uniform, heat loss is less, and energy is saved.

[0038] In this embodiment, as an optional specific implementation, the upper conveyor belt 2, the exit conveyor belt 3, the upper plate chain 42, and the lower plate chain 43 are all plate chain conveyor belts. Using plate chain conveyor belts to transport workpieces reduces the adhesion problem between the painted workpieces and the plate chain. The small contact area between the plate chain conveyor belt and the workpiece allows for better drying of the painted workpieces in the drying system. Simultaneously, the plate chain conveyor belt in the double-layer drying system 4 facilitates hot air circulation between the upper and lower layers, ensuring unobstructed airflow. Furthermore, the plate chain conveyor belt has a robust structure, making it less prone to deformation due to external vibration or impact, thus providing better stability during transportation. Additionally, the chain and plates of the plate chain conveyor belt can be replaced individually, simplifying maintenance and reducing costs. Moreover, the plate chain conveyor belt provides a stable conveying surface, reducing the risk of material jamming during transport and subsequent contact between workpieces. In addition, as an optional implementation, conventional tensioners are provided on the plate chain conveyor belt to tension the chain plates of the plate chain conveyor belt, preventing the chain plates of the plate chain conveyor belt from loosening under long-term working wear; and preventing the workpiece from running slowly in the double-layer drying system due to insufficient tension of the plate chain conveyor belt.

[0039] As a further specific implementation method, such as Figure 3 , 4As shown, the hoist 7 includes a frame 71, on which an upper receiving structure 72 and a lower receiving structure 73 are provided, corresponding to the upper plate chain 42 and the lower plate chain 43, respectively. The lower receiving structure receives the workpiece conveyed from the lower plate chain, and the upper receiving structure returns the workpiece to the upper plate chain. Additionally, a lifting frame 74 is provided on the frame 71, which is vehicularly connected to a lifting cylinder 75 mounted on the frame 71. The lifting cylinder 75 can drive the lifting frame 74 to move vertically. A linear assembly 76 is provided at the bottom of the frame 71, and a moving cylinder 77 is vertically mounted at the moving end of the linear assembly 76. A support plate 78 is provided at the telescopic end of the moving cylinder 77.

[0040] Specifically, in this embodiment, the upper supporting structure 72 includes several rollers 721 mounted on the frame 71. The rollers 721 are optionally rotatably connected to the frame, and their rotation provides a moving support base for the workpiece. Each roller 721 has a sprocket I 722 at its end, and adjacent sprockets I 722 are connected by chain drive. The frame 71 is equipped with a pushing cylinder 79, which is horizontally positioned. In this embodiment, the sprocket I is connected to the upper chain plate via a chain drive, enabling the upper chain plate and rollers to drive synchronously, thus achieving transmission.

[0041] Additionally, the lower supporting structure 73 includes a pair of half-shafts I 731 arranged on both sides of the frame 71. The half-shafts I 731 are optionally rotatably connected to the frame, providing a movable support base through rotation. Each half-shaft I 731 has a sprocket II 732 at its end, and adjacent sprockets II 732 are connected via chain drive. The lifting frame 74 has a pair of half-shafts II 741, which are optionally rotatably connected to the lifting frame. Gaps are left between the two opposing half-shafts I 731 and II 741 on both sides to allow the pallet 78 to move. In this embodiment, the sprockets II are connected to the lower chain plate via a chain drive, enabling the lower chain plate and half-shafts II to rotate synchronously.

[0042] In this embodiment, after the workpiece is conveyed by the lower plate chain 43 to the half-shaft I 731 of the lower receiving structure 73, the moving cylinder 77 is in a retracted state. The linear assembly 76 drives the moving cylinder 77 and the support plate 78 to move to the gap between the two half-shafts I 731. The moving cylinder 77 extends, pushing the support plate 78 upward and lifting the workpiece. Then the linear assembly 76 moves, moving the workpiece to the position corresponding to the half-shaft II 741. The moving cylinder 77 retracts, and the support plate 78 lowers, moving the workpiece onto the half-shaft II 741. Subsequently, the lifting cylinder 75 retracts, lifting the lifting frame 74 until the half-shaft II 741 corresponds to the roller 721 of the upper receiving structure. Then the pushing cylinder 79 extends, pushing the extension end of the pushing cylinder 79 to move the workpiece onto the roller 721. Driven by a chain, the sprocket I 722 on roller 721 moves the workpiece onto the upper plate chain 42, thereby lifting and shifting the workpiece. The upper plate chain then continues to transport the workpiece back and forth for further drying. In this embodiment, the elevator can quickly and continuously transfer products from the lower to the upper layer, reducing waiting and handling time and thus improving overall production efficiency.

[0043] As a further optional implementation, a sensor 733 is provided on the frame 71. In this embodiment, the sensor 733 may be a photoelectric sensor. After the workpiece moves into place, the photoelectric sensor is triggered, thereby monitoring the position of the workpiece in real time and knowing the operating status of the system. Specifically, in this embodiment, a sensor is provided on the frame at the location of the lower supporting structure 73. When the workpiece is conveyed to the half-shaft I by the lower chain plate, the photoelectric sensor is triggered, thereby stopping the rotation of the lower chain plate and the half-shaft I simultaneously.

[0044] In this embodiment, the double-layer design enables more efficient heating without increasing the production line floor space, while also utilizing heat energy more efficiently and reducing energy waste. Furthermore, the double-layer heating method provides uniform heat, accelerating the drying of the workpiece surface coating, improving production efficiency, saving space, and extending drying time to enhance the drying degree of the paint, even in space-constrained environments.

[0045] In addition, in this embodiment, the insulation layer 45 is provided with hooks. After the chain plates, bearings and other components of the plate chain conveyor belt are damaged, the insulation layer can be easily disassembled by lifting using the hooks for maintenance, thereby improving maintenance efficiency and reducing downtime.

[0046] Example 3: A universal painting line for brake drums and brake discs, such as... Figure 5As shown, based on Embodiment 2, the cooling system 6 includes a cooling support 61, a cooling conveyor belt 62 mounted on the cooling support 61, and a plurality of cooling fans 63 sequentially mounted on the cooling support 61 along the conveying direction of the cooling conveyor belt. In this embodiment, the cooling conveyor belt 62 is a plate chain conveyor belt, and the cooling conveyor belt 62 is inclined at a 5° angle to meet the requirements for vertical conveying height variation. During operation, the cooling fans start blowing air to cool the workpiece; when the workpiece reaches the bottom, it is cooled to room temperature for easy packaging. Figure 6 As shown, the chain plates of the chain conveyor belt in the above embodiment are vertical plates with ventilation gaps, allowing hot air to be blown onto the product through the gaps between the chain plates, achieving rapid drying and cooling. In this embodiment, since the upper outlet of the double-layer drying system is at a higher horizontal level, and the workpieces need to be packaged, coded, and labeled after cooling, the height of subsequent workstations is lower. Therefore, it is necessary to lower the height of the product. In this embodiment, the cooling conveyor belt 62 is designed in an inclined form, reducing one step of moving the workpiece from the upper layer to the lower layer, reducing intermediate steps, saving the need for a lifting mechanism, and reducing costs.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A universal paint spraying line for brake drums and brake discs, comprising a paint spraying chamber (1), characterized in that: The inlet and outlet of the spray booth (1) are connected to the upper conveyor belt (2) and the lower conveyor belt (3) respectively. The lower conveyor belt (3) is connected to the lower inlet of the double-layer drying system (4). The double-layer drying system (4) is equipped with an elevator (7). The upper outlet of the double-layer drying system (4) is connected to the transfer conveyor belt (5) and is coordinated with the cooling system (6) through the transfer conveyor belt (5).

2. The universal painting line for brake drums and brake discs according to claim 1, characterized in that: The double-layer drying system (4) includes a support (41), on which an upper plate chain (42) and a lower plate chain (43) are arranged in parallel. One end of the support (41) is connected to the elevator (7). An insulation layer (45) is provided outside the support (41) and the elevator (7). The upper outlet and the lower inlet are located at the other end of the support (41) and correspond to the upper plate chain (42) and the lower plate chain (43) respectively.

3. The universal painting line for brake drums and brake discs according to claim 2, characterized in that: The hoist (7) includes a frame (71), on which an upper support structure (72) and a lower support structure (73) are provided, which are respectively corresponding to the upper plate chain (42) and the lower plate chain (43); a lifting frame (74) is provided on the frame (71), and the lifting frame (74) is connected to a lifting cylinder (75) provided on the frame (71), which can drive the lifting frame (74) to move vertically; a linear assembly (76) is provided at the bottom of the frame (71), and a moving cylinder (77) is provided vertically at the moving end of the linear assembly (76), and a support plate (78) is provided at the telescopic end of the moving cylinder (77).

4. The universal painting line for brake drums and brake discs according to claim 3, characterized in that: The upper support structure (72) includes several rollers (721) on the frame (71), and each roller (721) is provided with a sprocket I (722) at its end. Adjacent sprockets I (722) are connected by chain drive. The frame (71) is provided with a push cylinder (79), which is horizontally arranged.

5. The universal painting line for brake drums and brake discs according to claim 4, characterized in that: The lower supporting structure (73) includes a pair of half shafts I (731) arranged on both sides of the frame (71), and each half shaft I (731) is provided with a sprocket II (732) at its end. The adjacent sprockets II (732) are connected by chain drive. The lifting frame (74) is provided with a pair of half shafts II (741), and there is a gap between the half shafts I (731) and the half shafts II (741) on both sides. The gap is used to allow the pallet (78) to move.

6. The universal painting line for brake drums and brake discs according to claim 5, characterized in that: The frame (71) is equipped with a sensor (733).

7. The universal painting line for brake drums and brake discs according to claim 6, characterized in that: The cooling system (6) includes a cooling bracket (61), a cooling conveyor belt (62) is provided on the cooling bracket (61), and a number of cooling fans (63) are arranged sequentially on the cooling bracket (61) along the conveying direction of the cooling conveyor belt (62).

8. The universal painting line for brake drums and brake discs according to claim 7, characterized in that: The upper conveyor belt (2), the lower conveyor belt (3), the upper plate chain (42), the lower plate chain (43), and the cooling conveyor belt (62) are all plate chain conveyor belts.

9. The universal painting line for brake drums and brake discs according to claim 8, characterized in that: The cooling conveyor belt (62) is inclined, and the transfer conveyor belt (5) is a turning plate chain conveyor.

10. The universal painting line for brake drums and brake discs according to any one of claims 1 to 9, characterized in that: The cooling system (6) is equipped with a handling robot (8) at the end and the upper part conveyor belt (2) at the front end.

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