High-precision non-covering local spraying device for zinc-aluminum coating brake disc

Abstract

The invention relates to the technical field of automatic manufacturing, in particular to a zinc-aluminum coating brake disc high-precision uncovered local spraying device which comprises an annular ground rail and a plurality of trolley units, and the trolley units move along the ground rail and sequentially pass through a feeding section, a spraying section and an unloading section. The trolley unit carries the rotating vertical shaft and the jig, and the jig supports the brake disc through three plate bodies to ensure that the brake disc stably rotates during spraying. Different from the prior art, due to the design of the jig, the upper slope surface of the plate body can partially penetrate into the center hole of the brake disc, and the brake disc is horizontally placed. In addition, a friction wheel at the lower end of the rotating vertical shaft and a first guide plate and a second guide plate above the rotating vertical shaft provide accurate support for spraying. On the upstream of the unloading section, the jig angle adjusting section ensures that the angle of the jig is consistent through a guide groove and a barrier strip, accurate grabbing of a mechanical arm is facilitated, and paint surface damage is avoided. By means of the design, manual operation is reduced, the automation degree is improved, the cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automated manufacturing, in particular to a high-precision uncovered local spraying device for a zinc-aluminum coated brake disc. Background Art

[0002] Brake discs, also known as brake discs, are key components in the automotive braking system. After the brake disc machining process is completed, it is an important process to spray the surface with anti-rust coating. This step is crucial to prevent the brake disc from rusting, extend its service life, and ensure the normal operation of the braking system.

[0003] After the processing of the brake disc is completed, the surface of the brake disc needs to be sprayed with anti-rust paint. Since paint spraying is a polluting operation, water paint spraying is a more environmentally friendly spraying material and spraying form. At present, the brake discs of high-end models are often sprayed with zinc-aluminum water paint coating on the surface of the brake disc for rust prevention. According to actual vehicle surveys, the high-hardness particles in the zinc-aluminum water paint coating on the braking surface of the brake disc will be embedded in the brake pad with braking. When the vehicle brakes, the high-hardness particles in the brake pad will scratch the braking surface, causing brake screams during braking, affecting vehicle safety. Based on the above, when spraying the zinc-aluminum coating on the brake disc, avoid spraying on the braking surface. The current solution for ultra-precision spraying is: manual loading + sticking masking tooling + automatic spraying + manual positioning and tearing off the masking tooling + automatic unloading. But it is undoubtedly inefficient and the quality is unstable.

[0004] At present, there are some mature spraying production lines that can realize the automatic spraying treatment of brake discs. For example, publication number CN207086194U discloses a track-type brake disc spraying line, which improves the efficiency and quality of spraying through automated equipment. In this production line, the induction device on the cylinder is used to detect whether the brake disc workpiece has reached the spraying position. Once the induction device detects that the workpiece is in place, it will notify the cylinder to start, and then drive the tensioning wheel to tighten the connecting belt. Subsequently, the magnetic ring induction device on the cylinder will notify the drive motor to drive the expansion sleeve pulley to rotate, thereby driving the connecting belt to move. In this process, a jig is arranged above the trolley device, and the brake disc workpiece to be sprayed can be installed on the jig. A jig passive wheel is also arranged on the jig. When the passive pulley is in close contact with the jig passive wheel on the trolley device, the movement of the connecting belt can drive the jig passive wheel on the trolley device to rotate, thereby rotating the brake disc to be sprayed on the jig. In this way, a brake disc spray gun can be installed on the clamping seat to spray the rotating brake disc below.

[0005] However, there are some limitations in the prior art. After spraying is completed, the driving force of the jig will disappear, causing the jig to gradually stop rotating, but the angle of the jig after stopping is random. In order to achieve continuous production, the sprayed brake disc needs to be removed before the paint surface dries. Since the brake disc is coated with paint on all surfaces except the braking surface, it can only be removed without damaging the paint surface by reaching into the center hole of the brake disc. Although the manual removal of the brake disc is not affected by the randomness of the jig angle, this method is inefficient.

[0006] If a robot is used for picking up, the angle of all jigs at the unloading position must be consistent, otherwise the robot needs to be equipped with an expensive visual judgment system to identify and adapt to different angles. Therefore, it is necessary to develop a new spraying production line to ensure that the jigs have a consistent angle at the unloading position, so as to adapt to the robot to realize an automated, efficient and paint-free brake disc spraying production line. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides a high-precision uncovered local spraying device for zinc-aluminum coated brake discs. The production line can ensure that all jigs have a consistent angle at the unloading position after spraying, without the need for an additional visual judgment system, thereby reducing costs and improving production efficiency. To this end, the technical solution adopted by the present invention is: A high-precision uncovered local spraying device for a zinc-aluminum coated brake disc comprises an annular ground rail, a plurality of trolley units are arranged at intervals to rotate repeatedly along the annular ground rail, the brake disc is placed on the trolley unit at the feeding section of the annular ground rail, is driven to rotate and be sprayed at the spraying section of the annular ground rail, and is removed from the trolley unit at the unloading section of the annular ground rail. Different from the prior art, the trolley unit comprises a rotating vertical shaft, a fixture is fixed at the upper end of the rotating vertical shaft, and the fixture comprises A seat body is plugged and fixed to the upper end of the rotating vertical shaft, and the seat body is fixed with 3 plates arranged in a circumferential circle along the rotating vertical shaft, each of the plates has an upslope surface with an upper end having a smaller distance from the axis of the rotating vertical shaft and a lower end having a larger distance from the axis of the rotating vertical shaft, and the 3 plates are partially inserted into the central hole of the brake disc so that the brake disc is placed horizontally thereon; a friction wheel is fixedly arranged at the lower section of the rotating vertical shaft, and a flat guide plate 1 and a guide plate 2 are fixedly arranged on the rotating vertical shaft above the friction wheel, and the guide plates are alternately connected. The long direction of the first guide plate is parallel to the plate surface direction of one of the plate bodies, and the second guide plate is orthogonal to the long direction of the first guide plate; a jig angle adjustment section is arranged upstream of the unloading section, and a guide groove whose length direction is consistent with the travel direction of the trolley unit is fixedly arranged on the frame of the annular ground rail where the jig angle adjustment section is located, and the guide groove is located below the second guide plate, and the guide groove allows the rotation vertical axis of the trolley unit to pass through, and the first guide plate is located within the range of the side walls of the guide groove in the vertical direction, and the width of the first guide plate is slightly smaller than the width of the guide groove; a baffle is fixedly arranged upstream of the guide groove, and the length direction of the baffle is consistent with the length direction of the guide groove, and the second guide plate is located within the range of the vertical surface of the baffle in the vertical direction, and the distance from the vertical surface of the baffle to the surface where the multiple rotation vertical axis axes located in the jig angle adjustment section are located is less than the length of the second guide plate; the three expansion claws of the finger cylinder at the lower end of the manipulator can respectively enter the center hole of the brake disc and between the two of the three plates.

[0008] Furthermore, a plurality of stepped surfaces are provided on the upslope surfaces of the three plates, which are suitable for adapting to the brake discs of different models.

[0009] Furthermore, strong magnets are embedded on the three plates or the three plates themselves are magnets to strengthen the fixation of the brake disc.

[0010] Furthermore, the fixture also includes an inverted bowl, the bowl edge of which is located below the upslope surfaces of the three plates and is used to collect residual materials splashed during the spraying process to prevent these residual materials from contaminating the friction wheel.

[0011] Furthermore, the free ends of the guide plate 1 and the guide plate 2 are in a semicircular arc shape.

[0012] Furthermore, the trolley unit further includes a chassis, a cylinder is fixedly provided at the center of the chassis, and the length of the cylinder is at least one quarter of the length of the rotating vertical axis to ensure sufficient support and stability; deep groove ball bearings are respectively installed at the upper and lower ends of the cylinder, and the lower section of the rotating vertical axis is located inside the cylinder and is rotatably supported by these two deep groove ball bearings; a thrust bearing is also installed at the center of the chassis, and the lower end of the rotating vertical axis is rotatably supported by the thrust bearing to achieve precise rotational motion.

[0013] Furthermore, the trolley unit further includes a running wheel installed at each corner of the lower surface of the chassis with an axially horizontal direction on the outer side, and a positioning wheel installed at each corner of the upper surface of the chassis with an axially vertical direction on the inner side; the annular ground rail includes two tracks one supporting the two running wheels on one side, two tracks two supporting the two positioning wheels on one side, a connecting vertical plate fixedly connected to the track one and the track two, an auxiliary positioning plate fixedly connected to the inner side of the track one, and three axially vertical lower guide sleeves are installed on the auxiliary positioning plate along the traveling direction of the trolley unit; an axially vertical upper guide sleeve is installed on the chassis corresponding to the lower guide sleeve in the middle; and also includes a precise rotation auxiliary unit, and the precise rotation auxiliary unit includes a plurality of fixedly arranged at the spraying section. On the frame of the annular ground rail, there is a lifting cylinder with a spacing equal to that of the trolley unit, and the cylinder rod of the lifting cylinder is fixedly connected to the lifting plate; the lifting plate is fixed with 6 guide rods corresponding to the lower guide sleeve, among which the middle guide rod on both sides is longer and the free end is gradually tapered so that it can extend into the upper guide sleeve when the other guide rods pass through the lower guide sleeve and abut against the lower surface of the chassis. At this time, the upper surface of the chassis abuts against the lower surface of the second track, and the chassis is positioned in the vertical direction. The middle guide rod is inserted into the lower guide sleeve and the upper guide sleeve at the same time, and the chassis is positioned in two horizontal directions. The chassis is firmly positioned, and the rotating vertical axis mounted thereon can achieve more precise rotational movement.

[0014] Furthermore, the travel wheels and positioning wheels are both ball bearings.

[0015] Furthermore, a photoelectric switch is fixedly arranged on the upper surface of the track 2, and a baffle is fixedly arranged on the chassis. When the baffle passes through the photoelectric switch, the photoelectric switch transmits a signal to the control unit, and the control unit controls the trolley unit to stop moving.

[0016] Furthermore, the annular ground rail also includes a driving device, which is used to drive the trolley unit to rotate repeatedly along the annular ground rail. The driving device is electrically connected to the control unit, and the control unit controls the start and stop of the driving device according to the signal of the photoelectric switch.

[0017] Compared with the prior art, the present invention ensures that the jig has a consistent angle at the unloading position, so that the manipulator can accurately grasp and place the brake disc, thereby avoiding scratches on the paint surface caused by inconsistent jig angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0020] Figure 3 It is a structural schematic diagram of the trolley unit of the present invention.

[0021] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0022] Figure 5 This is a schematic diagram of the structure of the trolley unit of the present invention after the brake disc is loaded.

[0023] Figure 6 for Figure 4 Center section view.

[0024] Figure 7 The present invention is a schematic structural diagram of a trolley unit equipped with a bowl.

[0025] Figure 8 for Figure 7 A partial enlarged view of point C in the middle.

[0026] Fig. 9 This is a schematic diagram of the structure when the robot grabs the brake disc.

[0027] Fig.10 Schematic diagram of the state change process when the rotating vertical axis is guided to rotate Figure 1 .

[0028] Fig.11 Schematic diagram of the state change process when the rotating vertical axis is guided to rotate Figure 2 .

[0029] Fig.12 Schematic diagram of the state change process when the rotating vertical axis is guided to rotate Figure 3 .

[0030] Fig.13 It is a structural schematic diagram of another viewing angle of the present invention.

[0031] Fig.14 for Fig.13 A partial enlarged view of point D in the middle.

[0032] Fig.15It is a schematic diagram of the structure of the trolley unit and the precise rotation auxiliary unit of the present invention.

[0033] Fig.16 for Fig.15 A partial enlarged view of point E in the middle.

[0034] Fig.17 for Fig.15 Cross-sectional view at FF. DETAILED DESCRIPTION

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] As shown in the accompanying drawings, a high-precision uncovered local spraying device for zinc-aluminum coated brake discs includes an annular ground rail 100, and a plurality of trolley units 200 are arranged at intervals to rotate repeatedly along the annular ground rail 100. The brake disc 300 is placed on the trolley unit 200 in the loading section 101 of the annular ground rail 100, is driven to rotate and be sprayed in the spraying section 102 of the annular ground rail 100, and is removed from the trolley unit 200 in the unloading section 103 of the annular ground rail 100. The trolley unit 200 includes a rotating vertical shaft 201, and a fixture 202 is fixed at the upper end of the rotating vertical shaft 201. The fixture 202 includes a A seat body 2022 is inserted and fixed at the upper end of the rotating vertical shaft 201, and the seat body 2022 is fixedly connected with three plates 2021 arranged in a circumferential array along the rotating vertical shaft 201. Each of the plates 2021 has an upslope surface 2023 with an upper end having a smaller distance from the axis of the rotating vertical shaft 201 and a lower end having a larger distance from the axis of the rotating vertical shaft 201. The three plates 2021 partially penetrate the central hole of the brake disc 300 so that the brake disc 300 is placed horizontally thereon; a friction wheel 203 is fixedly arranged at the lower section of the rotating vertical shaft 201, and a flat plate-shaped and alternate guide plate 1 204 and a guide plate 205 are fixedly connected to the rotating vertical shaft 201 above the friction wheel 203. The long direction of the guide plate 1 204 is parallel to the plate surface direction of one of the plate bodies 2021, and the guide plate 205 is orthogonal to the long direction of the guide plate 1 204; a jig angle adjustment section 104 is arranged upstream of the unloading section 103, and a guide groove 401 whose length direction is consistent with the travel direction of the trolley unit 200 is fixed on the frame of the annular ground rail 100 where the jig angle adjustment section 104 is located, and the guide groove 401 is located below the guide plate 205, and the guide groove 401 allows the rotation vertical axis 201 of the trolley unit 200 to pass through, and the guide plate 1 204 is located in the range of the side walls of the guide groove 401 on both sides in the vertical direction and the width of the guide plate 1 204 is slightly smaller than the width of the guide groove 401; a baffle 402 is fixedly arranged upstream of the guide groove 401, and the length direction of the baffle 402 is consistent with the length direction of the guide groove 401; the guide plate 205 is located within the vertical range of the baffle 402 in the vertical direction, and the distance from the vertical surface of the baffle 402 to the surface where the axis of the multiple rotating vertical axes 201 located in the fixture angle adjustment section 104 is located is less than the length of the guide plate 205; the three expansion claws of the finger cylinder at the lower end of the manipulator 600 can respectively enter the center hole of the brake disc 300 and between the three plates 2021.

[0039] The working process or working principle of the present invention can be briefly described as follows: Loading process: The brake disc 300 is placed on the trolley unit 200 in the loading section 101 of the circular ground rail 100. Each trolley unit 200 includes a rotating vertical shaft 201, and a fixture 202 is fixed on its upper end. The fixture 202 consists of a seat body 2022 and three plates 2021, and the plates 2021 are arranged in a circumferential array along the rotating vertical shaft 201. The plate 2021 is designed as an upslope surface 2023 with the upper end close to the axis and the lower end far from the axis, so as to partially penetrate the center hole of the brake disc 300 and support the brake disc 300.

[0040] Spraying process: the trolley unit 200 moves along the circular ground track 100 to the spraying section 102, where the brake disc 300 is driven to rotate and spray. The friction wheel 203 is fixed to the lower section of the rotating vertical shaft 201, and the friction wheel 203 interacts with the driving system to drive the rotating vertical shaft 201 and the brake disc 300 thereon to rotate.

[0041] Jig angle adjustment: After spraying is completed, the trolley unit 200 moves to the upstream of the unloading section 103, the jig angle adjustment section 104. Here, the guide groove 401, the baffle 402, the guide plate 1 204 and the guide plate 2 205 cooperate with each other to adjust the angle of the jig 202, ensuring that the angle of the jig is consistent when it reaches the unloading section 103, so that the robot 600 can remove the sprayed brake disc 300.

[0042] Unloading process: The three expansion claws of the finger cylinder at the lower end of the manipulator 600 extend into the center hole of the brake disc 300 and between the plate body 2021 to grab and unload the sprayed brake disc 300.

[0043] Through the above process, the present invention realizes the automation of brake disc spraying, improves production efficiency, ensures spraying quality, and avoids damaging the paint surface of the brake disc during unloading. The precise adjustment of the fixture angle ensures that the manipulator can smoothly perform grasping and unloading operations without the need for an additional visual judgment system, reducing costs and improving operational reliability.

[0044] The following three situations describe the process of fixture angle adjustment in detail: ①. If Fig.10 As shown, when the rotating vertical shaft 201 is about to enter the guide groove 401, the guide plate 205 is located on the opposite side of the baffle 402, which means that the free end of the guide plate 204 is facing away from the guide groove 401, so the rotating vertical shaft 201 can enter smoothly. After entering, the free end of the guide plate 204 touches the upper side or the lower side of the guide groove 401. Since the width of the guide plate 204 is slightly smaller than the width of the guide groove 401, when the guide plate 204 completely enters the guide groove 401, the plate surface direction of one of the plate bodies 2021 of the fixture 202 is basically consistent with the direction of the guide groove 401.

[0045] ②. If Fig.11 As shown, when the rotating vertical shaft 201 is about to enter the guide groove 401, the free end of the guide plate 205 is located below the same side of the baffle 402 and the angle between the guide plate 205 and the baffle 402 is an acute angle, and the free end of the guide plate 1 204 first touches the end of the guide groove 401, driving the rotating vertical shaft 201 to rotate counterclockwise, so that the guide plate 205 gradually moves away from the baffle 402, and finally as in situation ①, after the rotating vertical shaft 201 enters the guide groove 401, the free end of the guide plate 1 204 touches the lower side of the guide groove 401. Since the width of the guide plate 1 204 is slightly smaller than the width of the guide groove 401, when the guide plate 1 204 completely enters the guide groove 401, the plate surface direction of one of the plate bodies 2021 of the fixture 202 is basically consistent with the direction of the guide groove 401.

[0046] ③. If Fig.12 As shown, when the rotating vertical shaft 201 is about to enter the guide groove 401, the free end of the guide plate 205 is located above the same side of the baffle 402 and the angle between the guide plate 205 and the baffle 402 is a right angle or an obtuse angle. The free end of the guide plate 205 first touches the end of the baffle 402, driving the rotating vertical shaft 201 to rotate clockwise, gradually making the free end of the guide plate 1 204 touch the upper end of the guide groove 401, driving the rotating vertical shaft 201 to continue to rotate clockwise, and finally as in situation ①, after the rotating vertical shaft 201 enters the guide groove 401, the free end of the guide plate 1 204 touches the upper side of the guide groove 401. Since the width of the guide plate 1 204 is slightly smaller than the width of the guide groove 401, when the guide plate 1 204 completely enters the guide groove 401, the plate surface direction of one of the plate bodies 2021 of the fixture 202 is basically consistent with the direction of the guide groove 401.

[0047] In all cases, the adjustment process of the jig 202 is achieved through the interaction between the guide plate and the guide groove and the stop bar. This process ensures that the jig 202 has a consistent angle in the unloading section 103, so that the robot 600 can accurately grasp and unload the sprayed brake disc 300 without damaging its paint surface. This design improves the automation level and operational reliability of the spraying production line while reducing costs.

[0048] In this embodiment, a plurality of stepped planes 2024 are provided on the upslope surface 2023 of the three plates 2021, which are suitable for adapting to the brake discs 300 of different models. By providing a plurality of stepped planes 2024 on the upslope surface 2023, the jig 2022 can adapt to the brake discs 300 of different diameters and thicknesses, thereby improving the versatility of the jig and the flexibility of the production line. Different models of brake discs 300 require different jig positions or angles. The design of the stepped plane 2024 allows the jig 202 to be quickly adjusted to adapt to different models of brake discs, reducing the time required to replace the jig or adjust the production line. The stepped plane 2024 provides three positioning points to ensure the precise positioning of the brake disc 300 during the spraying process, which is essential for ensuring the spraying quality and preventing uneven coating. By adapting the same jig 202 to handle different models of brake discs 300, the need to manufacture and store jigs separately for each model is reduced, thereby reducing material consumption and inventory costs. Since the jig 202 can be adapted to various types of brake discs 300, the production line can process different types of brake discs without stopping, without the need to frequently replace the jig, thereby improving production efficiency.

[0049] In another preferred embodiment, strong magnets are embedded on the three plates 2021 or the three plates 2021 themselves are magnets to strengthen the fixation of the brake disc 300. By using strong magnets or magnetic materials, a strong attraction can be provided to ensure that the brake disc 300 will not shift or vibrate during high-speed rotation or spraying. The magnetic fixation method allows the brake disc 300 to be quickly and easily placed and removed from the fixture 202, improving the efficiency and ease of operation of the production line. Ensuring the stability of the brake disc 300 during the spraying process helps to improve the uniformity and quality of the spraying and reduce the risk of coating defects. The magnetic fixation method reduces the need for complex clamping devices, thereby reducing the cost and maintenance costs of the equipment.

[0050] In another preferred embodiment, the jig 202 further comprises a bowl 2025, the bowl edge of which is located below the upslope surface 2023 of the three plates 2021, and is used to collect the splashed residue during the spraying process to prevent the residue from contaminating the friction wheel 203. The bowl 2025 effectively collects the splashed residue during the spraying process to prevent the residue from falling onto the friction wheel 203, thereby preventing the friction wheel 203 from slipping due to contamination. By centrally collecting the residue, the need to clean the production line is reduced, making the maintenance and cleaning of the equipment easier and more efficient. Protecting the friction wheel 203 from the erosion of the residue helps to extend the service life of the friction wheel 203 and other related components. Reducing dust and pollutants in the spraying area provides a cleaner and safer working environment for operators. The collected residue can be recycled and reused, reducing resource waste, which is of environmental significance.

[0051] In this embodiment, the free ends of the guide plate 1 204 and the guide plate 2 205 are in a semicircular arc shape. The semicircular arc-shaped free ends provide a smooth transition, reduce the resistance of the rotating vertical shaft 201 when entering the guide groove 401, and make the entire adjustment process smoother. The semicircular arc shape reduces the friction when contacting with the guide groove 401 or other components, thereby reducing the wear rate and extending the service life of the guide plate and the guide groove. It avoids the sharp edges that may be caused by traditional right-angle edges, reducing the risk of injury to operators during maintenance or operation. The semicircular arc design helps to distribute the force more evenly, reduce stress concentration, and improve the structural strength of the components. In the process of the rotating vertical shaft 201 entering the guide groove 401, the semicircular arc shape can reduce the noise generated by impact, making the operating environment quieter.

[0052] In this embodiment, the trolley unit 200 further includes a chassis 206, and a cylinder 207 is fixedly provided at the center of the chassis 206. The length of the cylinder 207 is at least one quarter of the length of the rotating vertical axis 201 to ensure sufficient support and stability; deep groove ball bearings 208 are respectively installed at the upper and lower ends of the cylinder 207, and the lower section of the rotating vertical axis 201 is located inside the cylinder 207 and is rotatably supported by these two deep groove ball bearings 208; a thrust bearing 209 is also installed at the center of the chassis 206, and the lower end of the rotating vertical axis 201 is rotatably supported by the thrust bearing 209 to achieve precise rotational motion. The trolley unit 200 further includes a running wheel 210 installed at each corner of the lower surface of the chassis 206 with a horizontal axis outside, and a positioning wheel 211 installed at each corner of the upper surface of the chassis 206 with a vertical axis inside; the annular ground rail 100 includes two tracks 105 supporting two running wheels 210 on one side, two tracks 106 supporting two positioning wheels 211 on one side, a connecting vertical plate 107 fixedly connected to the track 105 and the track 2 106, an auxiliary positioning plate 108 fixedly connected to the inner side of the track 105, and three axially vertical lower guide sleeves 109 are installed on the auxiliary positioning plate 108 along the traveling direction of the trolley unit 200; an axially vertical upper guide sleeve 212 is installed on the chassis 206 corresponding to the middle lower guide sleeve 109; and also includes a precise rotation auxiliary unit 500, the precise rotation auxiliary unit 500 includes a plurality of fixedly arranged on the spraying section 102 A lifting cylinder 501 is provided on the frame of the annular ground rail 100 with a spacing equal to that of the trolley unit 200, and the cylinder rod of the lifting cylinder 501 is fixedly connected to a lifting plate 502; the lifting plate 502 is fixedly provided with 6 guide rods 503 corresponding to the lower guide sleeve 109, wherein the guide rod 503 in the middle of the two sides is longer and the free end is gradually tapered so as to be able to extend into the upper guide sleeve 212 when the other guide rods 503 pass through the lower guide sleeve 109 and abut against the lower surface of the chassis 206. At this time, the upper surface of the chassis 206 abuts against the lower surface of the track 2 106, and the chassis 206 is positioned in the vertical direction, and the guide rod 503 in the middle is inserted into the lower guide sleeve 109 and the upper guide sleeve 212 at the same time, and the chassis 206 is positioned in two horizontal directions, and the chassis 206 is firmly positioned, so that the rotating vertical axis 201 mounted thereon can achieve more precise rotational motion. The travel wheel 210 and the positioning wheel 211 are both ball bearings. In this embodiment, the design of the trolley unit 200 includes multiple key components, aiming to improve the stability, accuracy and automation of the entire brake disc spraying production line. The following are the main features and advantages of this design: 1. Enhanced stability and support: The length of the cylinder 207 at the center of the chassis 206 is at least one quarter of the length of the rotating vertical shaft 201, providing sufficient support and stability to ensure that the rotating vertical shaft 201 remains stable during the spraying process.

[0053] 2. Rotation support: Deep groove ball bearings 208 are installed at the upper and lower ends of the cylinder 207. The lower section of the rotating vertical shaft 201 is rotationally supported by these two bearings, which reduces friction and ensures smooth rotation of the rotating vertical shaft 201.

[0054] 3. Precise rotational movement: The thrust bearing 209 is installed at the center of the chassis 206 to provide rotational support for the lower end of the rotating vertical shaft 201, further ensuring the precise rotational movement of the rotating vertical shaft 201.

[0055] 4. Travel and positioning mechanism: Travel wheels 210 are installed on the lower surface of the chassis 206, and positioning wheels 211 are installed on the upper surface. These wheels enable the trolley unit 200 to move smoothly along the circular ground track 100 and maintain the correct position.

[0056] 5. Double track design: The annular ground track 100 includes a track 1 105 and a track 2 106, which respectively support the running wheels 210 and the positioning wheels 211, ensuring the stable operation of the trolley unit 200 on the track.

[0057] 6. Auxiliary positioning: The design of the auxiliary positioning plate 108 and the lower guide sleeve 109, as well as the use of the upper guide sleeve 212, provide accurate positioning for the trolley unit 200, ensuring the precise alignment and stability of the rotating vertical axis 201.

[0058] 7. Precision rotation auxiliary unit: The precision rotation auxiliary unit 500, including a lifting cylinder 501 and a lifting plate 502, and a guide rod 503, further enhances the positioning accuracy of the trolley unit 200 and ensures the precise rotation of the rotating vertical axis 201.

[0059] 8. Use of ball bearings: Both the traveling wheel 210 and the positioning wheel 211 are ball bearings, which reduces friction and improves the flexibility and efficiency of the trolley unit 200 moving along the annular ground track 100 .

[0060] This design improves the automation level and spraying quality of the spraying production line by combining precise mechanical structure and automatic control, while reducing maintenance costs and operational complexity. By ensuring the precise rotation and positioning of the rotating vertical axis 201, this design helps to improve the uniformity and consistency of spraying, thereby improving the quality of the final product.

[0061] In another preferred embodiment, a photoelectric switch 110 is fixed on the upper surface of the track 2 106, and a baffle 213 is fixed on the chassis 206. When the baffle 213 passes through the photoelectric switch 110, the photoelectric switch 110 transmits a signal to the control unit, and the control unit controls the trolley unit 200 to stop moving. The circular ground track 100 also includes a driving device, which is used to drive the trolley unit 200 to rotate repeatedly along the circular ground track 100. The driving device is electrically connected to the control unit, and the control unit controls the start and stop of the driving device according to the signal of the photoelectric switch 110. This design allows precise control of the stop position of the trolley unit 200, thereby improving the automation degree and operation accuracy of the production line. Automated control reduces manual intervention and improves production efficiency and safety.

[0062] The error of human operation is reduced through automated control, ensuring the consistency and quality of the spraying process. The combination of the photoelectric switch 110 and the baffle 213 provides a reliable detection mechanism to ensure that the trolley unit 200 stops at the correct position. The control mechanism can be easily integrated into the existing production line control system without large-scale modification of existing equipment. The maintenance of the photoelectric switch 110 and the baffle 213 is simple, reducing the maintenance cost of long-term operation. The design can adjust the stop position according to different production needs, improving the flexibility and adaptability of the production line.

[0063] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

[0064] The matters not described in detail in the present invention are the prior art or common knowledge in the field.

Claims

1. A high-precision uncovered local spraying device for a zinc-aluminum coated brake disc, comprising an annular ground rail (100), a plurality of trolley units (200) arranged at intervals to rotate repeatedly along the annular ground rail (100), a brake disc (300) being placed on the trolley unit (200) at a loading section (101) of the annular ground rail (100), being driven to rotate and be sprayed at a spraying section (102) of the annular ground rail (100), and being removed from the trolley unit (200) at an unloading section (103) of the annular ground rail (100), characterized in that: The trolley unit (200) comprises a rotating vertical shaft (201), a fixture (202) is fixedly arranged at the upper end of the rotating vertical shaft (201), the fixture (202) comprises a seat body (2022) plugged and fixed to the upper end of the rotating vertical shaft (201), the seat body (2022) is fixedly connected to three plates (2021) arranged in a circumferential array along the circumference of the rotating vertical shaft (201), each of the plates (2021) has an upslope surface (2023) with an upper end having a smaller distance from the axis of the rotating vertical shaft (201) and a lower end having a larger distance from the axis of the rotating vertical shaft (201), and the three plates (2021) are arranged The brake disc (300) is inserted into the central hole of the brake disc (300) so that the brake disc (300) is placed horizontally thereon; a friction wheel (203) is fixedly arranged at the lower section of the rotating vertical axis (201); a flat plate-shaped and alternate guide plate 1 (204) and a guide plate 2 (205) are fixedly connected to the rotating vertical axis (201) above the friction wheel (203); the long direction of the guide plate 1 (204) is parallel to the plate surface direction of one of the plate bodies (221); the guide plate 2 (205) is orthogonal to the long direction of the guide plate 1 (204); a jig angle adjustment section (104) is arranged upstream of the unloading section (103); A guide groove (401) is fixedly arranged on the frame of the annular ground rail (100) where the jig angle adjustment section (104) is located, and its length direction is consistent with the travel direction of the trolley unit (200). The guide groove (401) is located below the second guide plate (205). The guide groove (401) allows the rotation vertical axis (201) of the trolley unit (200) to pass through. The first guide plate (204) is located within the range of the side walls of the guide groove (401) in the vertical direction, and the width of the first guide plate (204) is slightly smaller than the width of the guide groove (401); at the top of the guide groove (401), the guide plate (204) is provided with a plurality of guide grooves (401) and a plurality of guide grooves (401) extending from the guide plate (204) to the guide plate (201). A retaining bar (402) is fixedly arranged, the length direction of the retaining bar (402) is consistent with the length direction of the guide groove (401), the second guide plate (205) is located within the vertical range of the retaining bar (402) in the vertical direction, and the distance from the vertical surface of the retaining bar (402) to the surface where the axes of the multiple rotating vertical axes (201) located in the fixture angle adjustment section (104) are located is less than the length of the second guide plate (205); the three expansion claws of the finger cylinder at the lower end of the manipulator (600) can respectively enter the central hole of the brake disc (300) and between the three plates (2021).

2. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 1, characterized in that: A plurality of stepped planes (224) are provided on the upslope surfaces (223) of the three plates (221), which are suitable for adapting to brake discs (300) of different models.

3. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 1, characterized in that: Strong magnets are embedded in the three plates (2021) or the three plates (2021) themselves are magnets to strengthen the fixation of the brake disc (300).

4. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 1, characterized in that: The jig (202) further comprises a bowl (2025), the bowl edge of which is located below the upslope surfaces (223) of the three plates (2021) and is used to collect residual materials splashed during the spraying process to prevent the residual materials from contaminating the friction wheel (203).

5. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 1, characterized in that: The free ends of the guide plate 1 (204) and the guide plate 2 (205) are in a semicircular arc shape.

6. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 1, characterized in that: The trolley unit (200) further comprises a chassis (206), a cylinder (207) being fixedly provided at the center of the chassis (206), the length of the cylinder (207) being at least one quarter of the length of the rotating vertical shaft (201) to ensure sufficient support and stability; deep groove ball bearings (208) are respectively installed at the upper and lower ends of the cylinder (207), the lower section of the rotating vertical shaft (201) is located inside the cylinder (207) and is rotationally supported by the two deep groove ball bearings (208); a thrust bearing (209) is also installed at the center of the chassis (206), the lower end of the rotating vertical shaft (201) is rotationally supported by the thrust bearing (209) to achieve precise rotational motion.

7. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 6, characterized in that: The trolley unit (200) further comprises a running wheel (210) mounted on the outer side of each corner of the lower surface of the chassis (206) with its axis in the horizontal direction, and a positioning wheel (211) mounted on the inner side of each corner of the upper surface of the chassis (206) with its axis in the vertical direction; the annular ground rail (100) comprises two tracks (105) supporting the two running wheels (210) on one side, two tracks (106) supporting the two positioning wheels (211) on one side, and the track (105) and the track (106) are fixedly connected. 6), the inner side of the track 1 (105) is fixedly connected to an auxiliary positioning plate (108), and three axially vertical lower guide sleeves (109) are installed on the auxiliary positioning plate (108) along the travel direction of the trolley unit (200); an axially vertical upper guide sleeve (212) is installed on the chassis (206) corresponding to the middle lower guide sleeve (109); and also includes a precise rotation auxiliary unit (500), the precise rotation auxiliary unit (500) including a plurality of fixedly arranged on the spraying section (10 2) on the frame of the annular ground rail (100) and having a spacing equal to that of the trolley unit (200), the cylinder rod of the lifting cylinder (501) being fixedly connected to the lifting plate (502); the lifting plate (502) being fixedly provided with 6 guide rods (503) corresponding to the lower guide sleeve (109), wherein the guide rod (503) in the middle of the two sides is longer and has a gradually tapered free end suitable for passing through the lower guide sleeve (109) and abutting against the chassis (206) when the other guide rods (503) pass through the lower guide sleeve (109). ) lower surface, it can extend into the upper guide sleeve (212), at which time the upper surface of the chassis (206) abuts against the lower surface of the track 2 (106), the chassis (206) is positioned in the vertical direction, the middle guide rod (503) is inserted into the lower guide sleeve (109) and the upper guide sleeve (212) at the same time, the chassis (206) is positioned in two horizontal directions, the chassis (206) is firmly positioned, and the rotating vertical axis (201) mounted thereon can achieve more precise rotational movement.

8. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 7, characterized in that: The traveling wheel (210) and the positioning wheel (211) are both ball bearings.

9. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 7, characterized in that: A photoelectric switch (110) is fixedly mounted on the upper surface of the second track (106), and a baffle (213) is fixedly mounted on the chassis (206); when the baffle (213) passes the photoelectric switch (110), the photoelectric switch (110) transmits a signal to a control unit, and the control unit controls the trolley unit (200) to stop moving.

10. A high-precision uncovered local spraying device for zinc-aluminum coated brake discs according to claim 9, characterized in that: The annular ground rail (100) further comprises a driving device, the driving device being used to drive the trolley unit (200) to rotate repeatedly along the annular ground rail (100), the driving device being electrically connected to the control unit, and the control unit controlling the start and stop of the driving device according to a signal from the photoelectric switch (110).

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