A brake disc hole spraying mechanism

Abstract

The application belongs to the technical field of brake disc processing, and particularly relates to a brake disc hole spraying mechanism, which comprises a rack, a conveying mechanism and a spraying assembly. The spraying assembly comprises linear guides, a mounting plate, a motor fixing seat, a motor, a main gear, spray pipes, a secondary gear and a bearing seat. The fixed ends of the two linear guides are fixedly connected with the top plate of the rack. The top of the mounting plate is fixedly provided with a U-shaped motor fixing seat. The motor is installed on the motor fixing seat. The downward output shaft of the motor is connected with the main gear located at the central position of the mounting plate. A plurality of bearing seats are fixedly arranged on the mounting plate around the edge of the main gear. The spray pipes are installed in the bearing seats. The bottom ends of the spray pipes extend below the mounting plate. The secondary gears meshed with the main gear are fixedly arranged on each spray pipe. The main gear is driven to rotate by the motor, and the plurality of secondary gears and the spray pipes are synchronously rotated, so that the inner wall of the brake disc hole is uniformly sprayed. The structure is compact, and the spraying efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of brake disc processing technology, and in particular to a brake disc bore spraying mechanism. Background Technology

[0002] As a key component of the automotive braking system, the surface quality and corrosion resistance of brake discs directly affect braking safety and service life. During brake disc manufacturing, a coating process is typically applied to the surface and inner walls of the bores to form a protective layer, improving the brake disc's corrosion and wear resistance. However, the internal space of the bores (such as center holes and cooling vents) on brake discs is limited, making it difficult for traditional spraying methods to evenly coat the surface. This can lead to uneven coating, missed areas, or coating buildup, negatively impacting the overall quality of the brake disc.

[0003] In existing technologies, some spraying equipment uses manual handheld spray guns to spray the inside of brake disc holes, which is not only inefficient but also results in inconsistent spraying quality heavily influenced by the operator's skill level. While some automated spraying equipment can automate the spraying of the brake disc surface, there is still a lack of effective solutions for spraying the inner walls of the holes. For example, Chinese patent CN105709983A discloses an automatic coating device for automotive brake discs, which uses a transport robot to place the brake discs on a turntable for spraying. However, this device mainly sprays the outer surface of the brake disc and struggles to effectively cover the inner wall area of ​​the holes. Furthermore, some existing spraying devices struggle to achieve synchronous operation of multiple spraying components during the spraying process, and spraying efficiency needs further improvement.

[0004] Therefore, there is an urgent need to provide a mechanism that can efficiently and uniformly spray the inner wall of the brake disc bore to solve the above-mentioned problems in the prior art. Summary of the Invention

[0005] Based on the technical problems existing in the prior art, the present invention proposes a spraying mechanism for the inside of brake disc holes.

[0006] This invention proposes a brake disc bore spraying mechanism, comprising a frame, a conveying mechanism, and a spraying assembly. The spraying assembly is mounted on the top plate of the frame. The conveying line of the conveying mechanism passes below the spraying assembly. The spraying assembly includes linear guides, a mounting plate, a motor mounting base, a motor, a main gear, a spray nozzle, a secondary gear, and bearing seats. The fixed ends of the two linear guides are respectively fixedly connected to the top plate of the frame, and their moving ends are respectively fixedly connected to the mounting plate below. A U-shaped motor mounting base is fixedly mounted on the top of the mounting plate, and the motor is mounted on the motor mounting base. The downward-facing output shaft of the motor is connected to the main gear located at the center of the mounting plate. Around the edge of the main gear, multiple bearing seats are fixedly mounted on the mounting plate. The spray nozzle is installed inside the bearing seats, and the bottom end of the spray nozzle extends below the mounting plate. Each spray nozzle is respectively fixedly fitted with a secondary gear that meshes with the main gear.

[0007] Preferably, the conveying mechanism is a belt conveyor or a roller conveyor, used to convey the brake disc to the spraying station below the spraying assembly.

[0008] Preferably, the bottom of the mounting plate is fixed with a plurality of positioning sleeves arranged in a ring array, and the nozzle passes through the corresponding positioning sleeve.

[0009] Preferably, the top of the nozzle is provided with a feed pipe, and one side of the bottom outer wall is provided with a plurality of nozzles evenly distributed vertically.

[0010] Preferably, the system further includes a controller electrically connected to the motor and the conveying mechanism, used to control the start and stop of the conveying mechanism and the rotation of the motor.

[0011] Preferably, the system further includes a position sensor, which is mounted on the frame and located at the spraying station below the spraying assembly. The position sensor is electrically connected to the controller and is used to detect whether the brake disc has reached the spraying station.

[0012] Preferably, the system further includes a flow regulating valve disposed on the nozzle, the flow regulating valve being electrically connected to the controller for adjusting the spraying flow rate of the nozzle.

[0013] Preferably, the motor is a servo motor, and the controller is electrically connected to the motor via a servo driver to control the motor's speed and rotation angle.

[0014] Preferably, the device also includes a control panel electrically connected to the controller. The control panel has a start button, a stop button, and a parameter setting interface for operators to control the operation of the equipment and set spraying parameters.

[0015] Preferably, the controller is a programmable logic controller (PLC), which has a pre-set spraying control program for controlling the conveying mechanism to pause after conveying the brake disc to the spraying station, controlling the linear guide rail to lower the mounting plate to the spraying position, controlling the motor to drive the spray nozzle to rotate for spraying, and controlling the linear guide rail to raise the mounting plate to reset after spraying.

[0016] Compared with the prior art, the present invention provides a brake disc bore spraying mechanism, which has the following beneficial effects: 1. By setting a motor to drive the main gear to rotate, the main gear drives multiple auxiliary gears meshing with it to rotate synchronously, which in turn drives multiple nozzles to rotate synchronously, realizing simultaneous spraying of multiple holes on the brake disc, greatly improving spraying efficiency.

[0017] 2. By setting a linear guide rail to drive the mounting plate to rise and fall, the spray nozzle can be accurately inserted into the hole of the brake disc for spraying. After spraying is completed, it automatically rises and retracts, with precise movements and a high degree of automation.

[0018] 3. By setting up a controller that is electrically connected to the conveying mechanism and motor, automatic coordinated control of conveying and spraying is realized, improving the automation level and production efficiency of the equipment; by setting up a position sensor to detect whether the brake disc has reached the spraying station, the spraying action is precisely triggered, avoiding dry spraying or missed spraying; by setting up a flow regulating valve to adjust the spraying flow of the spray pipe, the paint supply can be flexibly adjusted according to the spraying requirements of different brake disc models, improving the versatility of the equipment and the spraying quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation structure between the spray assembly and the frame of the present invention; Figure 3 This is a top view of the spraying assembly of the present invention; Figure 4 This is a bottom view of the spraying assembly structure of the present invention; Figure 5 This is a schematic diagram of the nozzle structure of the present invention.

[0020] In the diagram: 1. Frame; 2. Conveying mechanism; 3. Spraying assembly; 31. Linear guide rail; 32. Mounting plate; 321. Positioning sleeve; 33. Motor mounting base; 34. Motor; 35. Main gear; 36. Spray pipe; 361. Nozzle; 362. Feed pipe; 37. Secondary gear; 38. Bearing housing. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Reference Figures 1-5 A brake disc in-hole spraying mechanism includes a frame 1, a conveying mechanism 2, and a spraying assembly 3. The frame 1 provides support for the entire mechanism and has a top plate for mounting the spraying assembly 3. The conveying mechanism 2 is located in the middle of the frame 1, and its conveying path passes under the spraying assembly 3 to sequentially transport brake discs to be sprayed to the spraying station. The spraying assembly 3 is mounted on the top plate of the frame 1 and is used to perform in-hole spraying operations on the brake discs transported below it.

[0024] Specifically, the spraying assembly 3 includes linear guide rails 31, mounting plate 32, motor mounting base 33, motor 34, main gear 35, spray nozzle 36, auxiliary gear 37, and bearing housing 38. The fixed ends of the two linear guide rails 31 are fixedly connected to the top plate of the frame 1, and their moving ends are fixedly connected to the mounting plate 32 below. The linear guide rails 31 are vertically arranged, and their moving ends can move up and down vertically, thereby driving the mounting plate 32 to rise and fall. The mounting plate 32 is a horizontally arranged plate structure, with a U-shaped motor mounting base 33 fixed to its top. The motor 34 is mounted on the motor mounting base 33, and the output shaft of the motor 34 extends vertically downwards and connects to the main gear 35 located at the center of the mounting plate 32. The main gear 35 is horizontally arranged, and its center is fixedly connected to the output shaft of the motor 34, allowing it to rotate around a vertical axis under the drive of the motor 34.

[0025] Multiple bearing seats 38 are fixed to the mounting plate 32 around the edge of the main gear 35. The number of bearing seats 38 corresponds to the number of holes on the brake disc that need to be sprayed; for example, when the brake disc has four holes that need to be sprayed, four bearing seats 38 can be provided. A spray nozzle 36 is installed inside the bearing seat 38. The spray nozzle 36 is vertically positioned, with its bottom end extending below the mounting plate 32. A secondary gear 37 is fixedly fitted onto each spray nozzle 36, and the secondary gear 37 meshes with the main gear 35. When the motor 34 drives the main gear 35 to rotate, the main gear 35 drives the multiple secondary gears 37 meshing with it to rotate synchronously, thereby causing each spray nozzle 36 to rotate around its own axis within the bearing seat 38.

[0026] Furthermore, the conveying mechanism 2 is either a belt conveyor or a roller conveyor, used to transport the brake disc to the spraying station below the spraying assembly 3. The belt conveyor carries and transports the brake disc via a belt, while the roller conveyor carries and transports the brake disc via multiple parallel rollers; both methods can achieve smooth transport of the brake disc. The conveying direction of the conveying mechanism 2 is perpendicular to the arrangement direction of the spraying assembly 3. When the brake disc moves with the conveying mechanism 2 to directly below the spraying assembly 3, it reaches the spraying station.

[0027] Furthermore, multiple positioning sleeves 321 arranged in a ring array are fixed to the bottom of the mounting plate 32, through which the nozzle 36 passes. The positioning sleeve 321 is a cylindrical structure with an inner diameter that matches the outer diameter of the nozzle 36, serving to guide and radially position the nozzle 36. During the rotation and lifting of the nozzle 36, the positioning sleeve 321 effectively restricts the radial sway of the nozzle 36, ensuring that the nozzle 36 remains vertical, thereby improving spraying accuracy. Simultaneously, the multiple positioning sleeves 321 are arranged in a ring array, their positions corresponding one-to-one with the positions of the holes on the brake disc, ensuring that each nozzle 36 can accurately extend into its corresponding hole.

[0028] Furthermore, the nozzle 36 is a hollow tubular structure with a feed pipe 362 at its top for connecting to an external paint supply system to deliver paint into the nozzle 36. Multiple nozzles 361, evenly distributed vertically, are located on one side of the bottom outer wall of the nozzle 36. The nozzles 361 communicate with the interior of the nozzle 36, and paint is ejected from the nozzles 361 under pressure. The multiple nozzles 361 are evenly distributed along the axial direction of the nozzle 36, allowing the nozzle 36 to spray paint onto the inner wall of the brake disc hole from different heights after it is inserted, achieving comprehensive axial coverage of the inner wall. In addition, since the nozzles 361 are only located on one side of the bottom outer wall of the nozzle 36, when the nozzle 36 rotates, the spray direction of the nozzles 361 rotates circumferentially, thereby evenly spraying paint onto the entire circumference of the inner wall of the hole.

[0029] Furthermore, the spraying mechanism within the brake disc bore also includes a controller, which is electrically connected to the motor 34 and the conveying mechanism 2, and is used to control the start and stop of the conveying mechanism 2 and the rotation of the motor 34. The controller is the core control unit of this invention, and it coordinates the timing of the actions of the conveying mechanism 2 and the spraying assembly 3 according to preset control logic to achieve automated spraying operations.

[0030] Furthermore, the brake disc in-hole spraying mechanism also includes a position sensor. The position sensor is mounted on the frame 1 and located at the spraying station below the spraying assembly 3. The position sensor is electrically connected to the controller and is used to detect whether the brake disc has reached the spraying station. The position sensor can be a photoelectric sensor, proximity sensor, or laser sensor, etc. When the brake disc moves to the spraying station with the conveyor mechanism 2, the position sensor detects the brake disc's arrival signal and sends this signal to the controller. After receiving the arrival signal, the controller issues a control command to stop the conveyor mechanism 2 and simultaneously start the spraying assembly 3 to perform the spraying operation. The position sensor ensures precise triggering of the spraying action, avoiding problems such as dry spraying or missed spraying caused by the brake disc not being in position.

[0031] Furthermore, the brake disc bore spraying mechanism also includes a flow regulating valve mounted on the spray nozzle 36. This valve is electrically connected to the controller and is used to regulate the spraying flow rate of the spray nozzle 36. The flow regulating valve is installed on the feed pipe 362 of the spray nozzle 36, and the flow rate of paint entering the spray nozzle 36 is controlled by adjusting the valve opening. The controller can automatically adjust the opening of the flow regulating valve according to preset spraying parameters or different brake disc models to achieve spraying operations with different flow requirements. For example, for brake disc bores with larger diameters, the spraying flow rate can be appropriately increased; for brake disc bores with smaller diameters, the spraying flow rate can be reduced to avoid excessive paint accumulation or waste.

[0032] Furthermore, motor 34 is a servo motor, and the controller is electrically connected to motor 34 via a servo driver to control the speed and rotation angle of motor 34. Servo motors are characterized by fast response speed and high control precision, enabling precise control of the rotation speed and rotation angle of the main gear 35. During the spraying process, the controller sends pulse signals to motor 34 via the servo driver, controlling motor 34 to rotate at the set speed, thereby driving the nozzle 36 to rotate at an appropriate speed. By adjusting the speed of motor 34, the spray coverage density of nozzle 361 in the circumferential direction on the inner wall of the orifice can be controlled. The faster the speed, the larger the circumferential angle swept by nozzle 361 per unit time, resulting in more uniform spray coverage.

[0033] Furthermore, the spraying mechanism within the brake disc bore also includes a control panel electrically connected to the controller. The control panel features a start button, a stop button, and a parameter setting interface for operators to control equipment operation and set spraying parameters. The control panel can be located on the side of the frame 1 or independently near the operating station. Operators control the start and stop of the equipment using the start and stop buttons, and can set process parameters such as spraying time, motor speed, and spraying flow rate through the parameter setting interface. The parameter setting interface can be a touchscreen or a button-type input interface, which communicates with the controller to transmit the parameter values ​​input by the operator to the controller, which then executes the spraying control according to the set parameters.

[0034] Furthermore, the controller is a programmable logic controller (PLC), which has a pre-set spraying control program. This program controls the conveyor mechanism 2 to pause after transporting the brake disc to the spraying station, controls the linear guide rail 31 to lower the mounting plate 32 to the spraying position, controls the motor 34 to drive the spray nozzle 36 to rotate for spraying, and controls the linear guide rail 31 to raise the mounting plate 32 to its original position after spraying is complete. The programmable logic controller has advantages such as high reliability, strong anti-interference capability, and flexible programming, making it suitable for industrial environments.

[0035] Working principle: Before starting work, the operator sets the spraying parameters through the control panel, including the speed of motor 34, spraying duration, and lifting stroke of mounting plate 32. Then, the start button is pressed, and the equipment starts to run automatically.

[0036] First, the conveyor mechanism 2 starts, transporting the brake disc to be painted forward along the conveying direction. When the brake disc is transported directly below the painting assembly 3, the position sensor mounted on the frame 1 detects that the brake disc is in position and sends a positioning signal to the controller. Upon receiving the signal, the controller immediately stops the conveyor mechanism 2, keeping the brake disc stationary at the painting position.

[0037] Next, the controller controls the linear guide rail 31 to move, and its moving end drives the mounting plate 32 to move downwards in the vertical direction. As the mounting plate 32 descends, the spray nozzle 36 fixed on the mounting plate 32 moves downwards accordingly, and the bottom end of the spray nozzle 36 gradually extends into the corresponding hole on the brake disc. When the mounting plate 32 descends to the preset spraying position, that is, when the nozzle 361 at the bottom end of the spray nozzle 36 is fully inserted into the hole and reaches the predetermined depth, the controller controls the linear guide rail 31 to stop descending.

[0038] Then, the controller starts the motor 34, which drives the main gear 35 to rotate. The main gear 35 drives multiple auxiliary gears 37 meshing with it to rotate synchronously, and the auxiliary gears 37 drive the nozzle 36 to rotate around its own axis within the bearing housing 38. At the same time, the external paint supply system feeds paint into the nozzle 36 through the feed pipe 362. Under pressure, the paint is sprayed out from the nozzle 361 at the bottom of the nozzle 36 and onto the inner wall of the brake disc hole. As the nozzle 36 continues to rotate, the spray direction of the nozzle 361 constantly changes, thereby uniformly spraying the paint onto the entire circumferential surface of the hole's inner wall. Furthermore, because multiple nozzles 361 are evenly distributed along the axial direction of the nozzle 36, different height positions on the inner wall of the hole can be covered by the paint, achieving comprehensive and uniform spraying of the inner wall of the hole.

[0039] During the spraying process, the controller adjusts the spraying flow rate in real time through the flow regulating valve to ensure that the paint supply meets the process requirements. At the same time, the controller precisely controls the speed of motor 34 through a servo driver, so that the spray nozzle 36 rotates at a set speed to ensure the consistency of spraying quality.

[0040] When the spraying duration reaches the preset value, the controller stops the motor 34 from rotating and simultaneously stops the paint supply system. Then, the controller controls the linear guide 31 to reverse its direction, causing its moving end to drive the mounting plate 32 upwards vertically, and the spray nozzle 36 to retract from the brake disc hole and return to its initial position. Finally, the controller restarts the conveyor mechanism 2, sending the completed brake disc out of the spraying station and simultaneously conveying the next brake disc to be sprayed to the spraying station, beginning the next work cycle.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A brake disc bore spraying mechanism, comprising a frame (1), a conveying mechanism (2), and a spraying assembly (3), characterized in that, The spraying assembly (3) is mounted on the top plate of the frame (1). The conveying line of the conveying mechanism (2) passes under the spraying assembly (3). The spraying assembly (3) includes a linear guide rail (31), a mounting plate (32), a motor mounting base (33), a motor (34), a main gear (35), a spray pipe (36), a secondary gear (37), and a bearing seat (38). The fixed ends of the two linear guide rails (31) are respectively fixedly connected to the top plate of the frame (1), and their moving ends are respectively fixedly connected to the mounting plate (32) below. A U-shaped motor is fixed on the top of the mounting plate (32). The motor (34) is mounted on the motor mounting base (33). The downward-facing output shaft of the motor (34) is connected to the main gear (35) located at the center of the mounting plate (32). Around the edge of the main gear (35), a plurality of bearing seats (38) are fixed on the mounting plate (32). The nozzle (36) is installed in the bearing seat (38). The bottom end of the nozzle (36) extends to the bottom of the mounting plate (32). Each nozzle (36) is respectively fixedly fitted with a secondary gear (37) that meshes with the main gear (35).

2. The brake disc bore spraying mechanism according to claim 1, characterized in that, The conveying mechanism (2) is a belt conveyor or a roller conveyor, used to convey the brake disc to the spraying station below the spraying assembly (3).

3. The brake disc bore spraying mechanism according to claim 1, characterized in that, The mounting plate (32) has multiple positioning sleeves (321) arranged in a ring array fixed at its bottom, and the nozzle (36) passes through the corresponding positioning sleeve (321).

4. The brake disc bore spraying mechanism according to claim 1, characterized in that, The nozzle (36) has a feed pipe (362) at the top and multiple nozzles (361) evenly distributed vertically on one side of its bottom outer wall.

5. The brake disc bore spraying mechanism according to claim 1, characterized in that, It also includes a controller, which is electrically connected to the motor (34) and the conveying mechanism (2) for controlling the start and stop of the conveying mechanism (2) and the rotation of the motor (34).

6. The brake disc bore spraying mechanism according to claim 5, characterized in that, It also includes a position sensor, which is installed on the frame (1) and located at the spraying station below the spraying assembly (3). The position sensor is electrically connected to the controller and is used to detect whether the brake disc has reached the spraying station.

7. A brake disc bore spraying mechanism according to claim 5, characterized in that, It also includes a flow regulating valve disposed on the nozzle (36), the flow regulating valve being electrically connected to the controller for adjusting the spraying flow rate of the nozzle (36).

8. A brake disc bore spraying mechanism according to claim 5, characterized in that, The motor (34) is a servo motor. The controller is electrically connected to the motor (34) through a servo driver and is used to control the speed and rotation angle of the motor (34).

9. A brake disc bore spraying mechanism according to claim 5, characterized in that, It also includes a control panel electrically connected to the controller, the control panel having a start button, a stop button and a parameter setting interface, for operators to control the operation of the equipment and set spraying parameters.

10. A brake disc bore spraying mechanism according to claim 5, characterized in that, The controller is a programmable logic controller. The controller has a pre-set spraying control program, which is used to control the conveying mechanism (2) to stop after conveying the brake disc to the spraying station, control the linear guide rail (31) to drive the mounting plate (32) to descend to the spraying position, control the motor (34) to drive the spray pipe (36) to rotate for spraying, and control the linear guide rail (31) to drive the mounting plate (32) to rise and reset after spraying is completed.

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