Spraying device for surface processing of drive axle

Abstract

The invention provides a spraying device for surface machining of a drive axle, and relates to the technical field of automobile part machining, and the spraying device comprises a main frame, a cross beam type spraying assembly arranged in a crossing mode and two bearing type kidney-shaped side plates. A belt body conveying part driven by a motor is arranged on the main frame, and a transverse fixed rod in a belt body is connected with a bearing mechanism; the bearing mechanism can slide along the edge of the kidney-shaped side plate, comprises a bracket part with a semicircular bracket groove and a side end abutting part, and is used for bearing and centering the two ends of the drive axle. And rotating action units are arranged on the supporting cross beam parts on the two sides of the main frame, and when the bearing mechanisms move to make the end abutting parts make contact with the rotating action units, the driving axles can be driven to rotate in the supporting grooves. The beam type spraying assembly stretches across the belt body and can slide. And after the abutting part is separated from the rotating unit, the spraying assembly automatically returns. Automatic rotation and synchronous tracking spraying of the drive axle in the conveying process are achieved, spraying uniformity and comprehensiveness are guaranteed, and the production automation degree and efficiency are improved.

Description

A spraying device for surface processing of drive axles Technical Field

[0001] This invention relates to the field of automotive component processing technology, and in particular to a spraying device for processing the surface of a drive axle. Background Technology

[0002] As a key component of a vehicle's transmission system, the drive axle's primary function is to transmit engine power to the wheels and bear vehicle loads and complex stresses during driving. The performance and durability of the drive axle directly affect the safety and reliability of the entire vehicle. Surface coating is a crucial step in the drive axle's manufacturing process. Applying a protective coating effectively prevents premature failure due to corrosion and wear, extending its service life.

[0003] Currently, the two main spraying methods widely used in production are manual operation and automated fixed spray guns. In manual operation, the operator holds the spray gun and moves it around a drive axle suspended or fixed to a bracket to spray. This method heavily relies on the operator's experience and skill, and is prone to uneven coating thickness due to arm tremors and inconsistent movement speed. It is also labor-intensive, inefficient, and poses a health risk from paint inhalation. Automated fixed spray guns, on the other hand, involve fixing multiple spray guns at specific positions around the drive axle and spraying according to a preset program. While reducing manpower, the complex shape of the drive axle and numerous obstructed areas mean that fixed spray guns cannot achieve omnidirectional coverage, easily creating blind spots and insufficient local protection. Furthermore, both methods require loading, unloading, and handling of workpieces before and after spraying, disrupting the continuity of the production process and making them unsuitable for the demands of high-efficiency, high-quality modern mass production. Summary of the Invention

[0004] The purpose of this invention is to provide a spraying apparatus for processing the surface of a drive axle, so as to solve the technical problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides a spraying device for surface processing of a drive axle, comprising a main frame, a beam-type spraying assembly, and two supporting oval side plates. A belt conveyor is mounted on the main frame, driven by a motor to achieve cyclic movement of the belt. The two supporting oval side plates are respectively located on both sides of the belt conveyor. Each supporting oval side plate has multiple supporting mechanisms that can cyclically slide around its edge. The supporting mechanisms on the two supporting oval side plates correspond one-to-one and respectively support both ends of the drive axle body. Each supporting mechanism includes a support portion and an end-clamping component. The support portion is slidably mounted on the edge of the supporting oval side plate, and its upper end has a semi-circular groove portion that supports one end of the drive axle body in a rolling contact manner. The support portion is connected to a transverse fixing rod inside the belt body. The end-clamping component is located on the side of the support portion and can move along the width direction of the supporting oval side plate. The mechanism allows for the tightening and loosening of the drive axle body's ends. The main frame has two supporting crossbeams arranged along the length of the belt conveyor component. These crossbeams are located on either side of the belt conveyor component and are equipped with rotating action units. When the outer end of the end-tightening component contacts the rotating action unit and moves along the edge of the supporting oval side plate, the rotating action unit acts on the drive axle body through the end-tightening component, causing the drive axle body to rotate. The beam-type spraying assembly spans the belt conveyor component and is positioned above it. Both ends of the beam-type spraying assembly are slidably connected to the two supporting crossbeams. The beam-type spraying assembly is used to spray paint downwards. When the supporting mechanism moves to the underside of the beam-type spraying assembly, the beam-type spraying assembly moves with the supporting mechanism. When the end-tightening component disengages from the rotating action unit, the beam-type spraying assembly automatically returns to its initial position.

[0006] Based on the above technical solutions, the present invention also provides the following optional technical solutions: In one optional solution: the beam-type spraying assembly includes a spraying gantry and a spraying chamber. The spraying gantry is located on the upper side of the conveyor belt component, and both ends of it are provided with frame legs. The frame legs are slidably connected to the supporting beam on the same side. The frame legs are connected to the end of the rotating action unit connected to the main frame through a return spring. The spraying chamber is located at the upper end of the spraying gantry and is used to store spraying liquid. The lower surface of the spraying gantry is provided with a spraying hood, and the inside of the spraying hood has multiple nozzles evenly distributed along the length direction of the spraying gantry. The nozzles are connected to the spraying chamber and spray the spraying liquid downwards.

[0007] In one alternative: a plurality of circumferentially distributed ball bearings are provided on the inner wall of the semi-circular support portion. The ball bearings are freely rotatable and have pressure sensors on their surfaces. The pressure sensors are electrically connected to the end abutment component via a central controller. At least one movable connecting rod is provided on the side of the support portion facing the belt conveyor component. The movable connecting rod is connected to a transverse fixing rod inside the belt body.

[0008] In one alternative embodiment: an outer frame is provided on the side wall of the support portion away from the conveyor belt component; the end clamping component includes a rotating clamping unit, a lower spraying actuation unit, and an adjusting cylinder; the rotating clamping unit is located on the side of the support portion, and its bottom is slidably connected to the outer frame; the adjusting cylinder is fixed on the side wall of the support portion, and one end of its cylinder is connected to the rotating clamping unit; the rotating clamping unit has a disc-shaped internal structure and is used to clamp the end of the drive axle body; the top of the rotating clamping unit can be connected to a rotating action unit, and during movement, the drive axle body is driven to rotate under the action of the rotating action unit; the lower spraying actuation unit is slidably provided at the bottom of the outer frame, and the lower spraying actuation unit is connected to the bottom of the rotating clamping unit; the outer frame and the rotating clamping unit move synchronously in opposite directions; the lower spraying actuation unit can be connected to the frame support leg and actuate its movement.

[0009] In one alternative embodiment: the rotating clamping unit includes an outer ring frame and a turntable. The center of the outer ring frame and the center of the semi-circular support are on a straight line. A clamping support is fixed to the arc bottom of the outer ring frame. The clamping support is slidably connected to the outer frame and fixedly connected to the end of the adjusting cylinder. The turntable is rotatably disposed inside the outer ring frame. Multiple circumferentially distributed radial grooves are opened on its end face facing the support. A slidable clamping block is inside each radial groove. The end face of the clamping block facing the turntable is inclined. The clamping block is connected to the inner end wall of the radial groove by a clamping spring. The end face of the turntable away from the support has a rotating connection part, which can be connected to the rotating action unit.

[0010] In one alternative embodiment: the rotary connection includes an outer central shaft and an external gear portion mounted on the outer central shaft, the outer central shaft being fixedly connected to the center of the turntable end face; the rotary action unit includes a guide rod frame and a guide rack, the guide rack being located on the side of the supporting oval side plate and arranged along its length, the end of the guide rack having a support arm, the support arm being fixedly connected to the supporting crossbeam portion, the guide rack being located on the upper end face of the guide rod frame, and the length of the guide rack being less than the length of the guide rod frame; when the end face of the guide rack abuts against the end of the drive axle body, the guide rack is on the travel path of the external gear portion and can mesh with it.

[0011] In one alternative: the end of the guide rod frame is further provided with a discharge sensing block, which is located on the travel path of the external gear after the turntable releases the drive axle body; when the external gear passes by the discharge sensing block, the discharge sensing block generates a sensing signal.

[0012] In one alternative embodiment: the frame support legs are provided with protrusions; the lower spraying actuation unit includes a lower movable seat and a lever; the lower movable seat is slidably mounted on the outer frame, and a lower rack is provided on its upper surface; the lever is located at one end of the lower movable seat and points towards the frame support legs; the outer frame is also provided with a transmission shaft located between the abutment support and the lower movable seat; the transmission shaft is rotatable and is provided with a transmission gear; an upper rack is provided on the lower end face of the abutment support, and both the upper and lower racks mesh with the transmission gear.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects: The present invention achieves automatic continuous conveying and precise positioning of the drive axle by setting up a supporting oval side plate, a conveyor belt, and a recirculating sliding support mechanism; utilizing the cooperation of the end-clamping component and the rotating action unit, the drive axle rotates automatically and smoothly during movement; combined with the synchronous following spraying of the beam-type spraying assembly, it ensures that the entire outer surface of the drive axle is uniformly covered with paint without any dead corners. This device has a reasonable structure and a high degree of automation, integrating conveying, rotation, spraying, and paint collection into one unit, effectively improving spraying efficiency and consistency while reducing paint waste, and is particularly suitable for the batch automated spraying production of drive axles. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 is a schematic diagram of the overall structure of the spraying device for surface processing of the drive axle in this invention; Figure 2 is a schematic diagram of the support mechanism from one perspective in one embodiment of this invention; Figure 3 is a schematic diagram of the support mechanism from another perspective in one embodiment of this invention; Figure 4 is a schematic diagram of one structure of the rotating clamping unit in one embodiment of this invention; Figure 5 is a schematic diagram of another structure of the rotating clamping unit in one embodiment of this invention; Figure 6 is a schematic diagram of the beam-type spraying assembly and rotating action unit in one embodiment of this invention.

[0016] Reference numerals: Belt conveyor component 100, supporting oval side plate 200, main frame 300, supporting crossbeam 310, crossbeam spraying assembly 400, spraying gantry 410, spraying chamber 420, spraying hood 430, frame support leg 440, protrusion 450, return spring 460, supporting mechanism 500, support seat 510, semi-circular support groove 520, ball bearing 530, moving connecting rod 540, outer frame 550, rotating clamping unit 560, outer ring frame 561, turntable 562, outer middle Spindle 563, external gear 564, clamping support 565, radial groove 566, clamping block 567, clamping spring 568, upper rack 569, lower spraying actuation unit 570, lower movable seat 571, lower rack 572, lever 573, adjusting cylinder 580, transmission shaft 590, transmission gear 591, rotation action unit 600, guide rod frame 610, guide rack 620, unloading sensor block 630, support arm 640, drive axle body 700, scraper 800, guide groove 810. Detailed Implementation

[0017] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The present invention will be further explained below with reference to specific embodiments.

[0021] In one embodiment, as shown in Figures 1-3, a spraying device for surface processing of a drive axle includes a main frame 300, a beam-type spraying assembly 400, and two supporting oval side plates 200. A belt conveyor 100 is mounted on the main frame 300, driven by a motor to achieve cyclic movement of the belt. The two supporting oval side plates 200 are respectively located on both sides of the belt conveyor 100. Each supporting oval side plate 200 is provided with multiple supporting mechanisms 500 that can cyclically slide around its edge. The supporting mechanisms 500 on the belt 200 correspond one-to-one and support both ends of the drive axle body 700 respectively. Each supporting mechanism 500 includes a support portion 510 and an end abutment component. The support portion 510 is slidably disposed on the edge of the supporting oval side plate 200, and its upper end has a semi-circular support groove portion 520 that supports one end of the drive axle body 700 in a rolling contact manner. The support portion 510 is connected to the transverse fixing rod inside the belt body. The end abutment component is disposed on the side of the support portion 510 and can move along the width direction of the supporting oval side plate 200. The end abutment member is used to press against and release the end of the drive axle body 700. The main frame 300 has two support beams 310 arranged along the length of the belt conveyor 100. The two support beams 310 are located on both sides of the belt conveyor 100 and are provided with a rotation action unit 600. When the outer end of the end abutment member contacts the rotation action unit 600 and moves along the edge of the supporting oval side plate 200, the rotation action unit 600 can act on the drive axle body 700 through the end abutment member, so that the drive axle body 700 rotates. The beam-type spraying assembly 400 spans the belt conveyor 100 and is positioned above the belt conveyor 100. Both ends of the beam-type spraying assembly 400 are slidably connected to two supporting beams 310. The beam-type spraying assembly 400 is used to spray paint downwards. When the supporting mechanism 500 moves to the lower side of the beam-type spraying assembly 400, the beam-type spraying assembly 400 can move with the supporting mechanism 500. When the end abutment component disengages from the rotating action unit 600, the beam-type spraying assembly 400 automatically returns to its initial position.

[0022] In this embodiment of the invention, a robotic arm or handling device is used to place the drive axle body 700 onto a pair of support mechanisms 500 located at one end of the support-type oval side plate 200. Both ends of the drive axle body 700 are respectively located inside the semi-circular support groove 520. End-end abutting components abut against the ends of the drive axle body 700 to center it. The belt conveyor 100 starts working and is driven by a motor, causing the belt to move cyclically. A conventional motor is used, and its structure will not be described in detail. The support mechanism 500 follows the belt of the belt conveyor 100 along the edge of the support-type oval side plate 200, thereby moving the drive axle body 700 toward the other end of the belt conveyor 100. When the support mechanism 500 passes the rotating action unit 600, the end-end abutting component contacts the rotating action unit 600, and the end-end abutting component moves relative to the rotating action unit 600. The rotating action unit 600 then... The end-clamping component acts on the drive axle body 700, causing it to rotate. Simultaneously, the beam-type spraying assembly 400 operates and sprays paint onto the downward-facing drive axle body 700. The drive axle body 700 can move synchronously with the supporting mechanism 500 to achieve thorough and comprehensive spraying of the rotating drive axle body 700. When the end-clamping component disengages from the rotating action unit 600, the beam-type spraying assembly 400 automatically returns to its initial state to facilitate spraying the next drive axle body 700. At the same time, the end-clamping component releases the end of the drive axle body 700, and the drive axle body 700 can be operated by a robot or handling device for unloading, achieving automated spraying. Some of the paint sprayed downward by the beam-type spraying assembly 400 is placed on the surface of the belt conveyor 100, which transports it to the end for centralized collection.

[0023] The conveyor belt 100 is provided with a scraper 800 at the unloading end. One end of the scraper 800 abuts against the surface of the belt, and the other end has a guide groove 810. When the belt passes through the scraper 800, the end of the scraper 800 can scrape off the paint liquid attached to the belt and guide it to the guide groove 810 for centralized collection.

[0024] In one embodiment, as shown in Figures 1, 2, 3, and 6, the beam-type spraying assembly 400 includes a spraying gantry 410 and a spraying chamber 420. The spraying gantry 410 is located on the upper side of the conveyor belt 100, and both ends of it are provided with frame legs 440. The frame legs 440 are slidably connected to the supporting beam 310 located on the same side. The frame legs 440 are connected to the end of the rotating action unit 600 connected to the main frame 300 by a return spring 460. The spraying chamber 420 is located on the upper end of the spraying gantry 410 and is used to store spraying liquid. The lower surface of the spraying gantry 410 is provided with a spraying hood 430, and the spraying hood 430 has a plurality of nozzles evenly distributed along the length direction of the spraying gantry 410. The nozzles are connected to the spraying chamber 420 and spray the spraying liquid downward. In this embodiment of the invention, after the end-clamping component moves to the lower side of the spraying gantry 410, it acts on the frame support leg 440 to make it move accordingly. Thus, the spraying gantry 410 and its spraying chamber 420 and spraying hood 430 move accordingly. The nozzle in the spraying hood 430 directs the spraying liquid in the spraying chamber 420 toward the rotating drive axle body 700, thereby achieving full spraying of the surface of the drive axle body 700 and ensuring sufficient spraying. When the end-clamping component disengages from the rotating action unit 600, the end-clamping component disengages from the frame support leg 440. The frame support leg 440 automatically moves back to the initial position under the restoring force of the return spring 460, so as to facilitate spraying of the next drive axle body 700.

[0025] In one embodiment, as shown in Figures 1-5, a plurality of circumferentially distributed ball bearings 530 are provided on the inner wall of the semi-circular support portion 520. The ball bearings 530 are freely rotatable and have pressure sensors on their surfaces. These pressure sensors are electrically connected to the end-clamping component via a central controller. At least one movable connecting rod 540 is provided on the side of the support portion 510 facing the belt conveyor component 100. The movable connecting rod 540 is connected to a transverse fixed rod inside the belt body. In this embodiment, when the end of the drive axle body 700 is placed inside the semi-circular support portion 520, it is supported by the rolling of the plurality of ball bearings 530, allowing the drive axle body 700 to... The ball bearing 530 rotates freely, and the pressure sensor on its surface is subjected to force and generates an electrical signal. The electrical signal is transmitted to the main controller, which controls the end abutment component to work and moves it toward the support portion 510 to abut against the end of the drive axle body 700. The moving link 540 is connected to the end of the transverse fixing rod inside the belt body, so that the support mechanism 500 can move synchronously with the belt of the belt conveying component 100 to realize the transport of the drive axle body 700. The main controller is used to receive electrical signals and control the working state of the end abutment component according to the electrical signals. Its internal free chip and its control process are existing technologies, so they will not be described in detail here.

[0026] In one embodiment, as shown in Figures 1-5, an outer frame 550 is provided on the side wall of the support portion 510 away from the belt conveyor 100. The end abutment component includes a rotating abutment unit 560, a lower spraying actuation unit 570, and an adjusting cylinder 580. The rotating abutment unit 560 is located on the side of the support portion 510, and its bottom is slidably connected to the outer frame 550. The adjusting cylinder 580 is fixed on the side wall of the support portion 510, and one end of its cylinder is connected to the rotating abutment unit 560. The internal structure of unit 60 is a disc-shaped structure used to abut against the end of the drive axle body 700. The top of the rotating abutment unit 560 can be connected to the rotating action unit 600, and during movement, it drives the drive axle body 700 to rotate under the action of the rotating action unit 600. The lower spraying actuation unit 570 is slidably disposed at the bottom of the outer frame 550, and the outer frame 550 is connected to the bottom of the rotating abutment unit 560. The lower spraying actuation unit 570 and the rotating abutment unit 560 move synchronously in opposite directions. It can connect to and move the frame support leg 440; in this embodiment of the invention, when the end of the drive axle body 700 is placed in the semi-circular bracket portion 520, the ball bearing 530 generates an electrical signal and transmits it to the main controller. The main controller sends an adjustment command to the adjusting cylinder 580. The adjusting cylinder 580 drives the rotating pressing unit 560 to move closer to or away from the support portion 510 through extension and retraction, so as to achieve pressing and releasing of the drive axle body 700. The moving rotating pressing unit 560 also acts on the lower spraying actuation unit 570 to make They move synchronously and in opposite directions. When the rotating clamping unit 560 abuts against the end of the drive axle body 700, the end of the lower spraying actuation unit 570 away from the outer frame 550 can connect with the frame support leg 440 and make it follow the movement. When the rotating clamping unit 560 releases the end of the drive axle body 700, the lower spraying actuation unit 570 moves toward the outer frame 550 and disengages from the frame support leg 440, so that the beam-type spraying assembly 400 can return to the initial position under the elastic force of the return spring 460.

[0027] In one embodiment, as shown in Figures 1-5, the rotating clamping unit 560 includes an outer ring frame 561 and a turntable 562. The center of the outer ring frame 561 and the center of the semi-circular support groove 520 are on a straight line. A clamping support 565 is fixed to the arc bottom of the outer ring frame 561. The clamping support 565 is slidably connected to the outer frame body 550 and fixedly connected to the end of the adjusting cylinder 580. The turntable 562 is rotatably disposed inside the outer ring frame 561. Multiple circumferentially distributed radial grooves 566 are opened on its end face facing the support groove 510. A slidable clamping block 567 is disposed inside each radial groove 566. The end face of the clamping block 567 facing the turntable 562 is inclined. The clamping block 567 is connected to the inner end wall of the radial groove 566 by a clamping spring 568. The turntable 562... The end face away from the support portion 510 has a rotating connection portion, which can be connected to the rotating action unit 600. In this embodiment of the invention, when the adjusting cylinder 580 drives the rotating pressing unit 560 to move toward the support portion 510, the end face of the turntable portion 562 gradually abuts against the end of the drive axle body 700, and the inclined surface of the pressing block 567 automatically abuts against the edge of the end of the drive axle body 700. Under the elastic force of the pressing spring 568, the drive axle body 700 is clamped. Thus, when the turntable portion 562 rotates, the drive axle body 700 can rotate accordingly. The rotating connection portion can be docked with the rotating action unit 600. By utilizing its own movement and the action of the rotating action unit 600, it rotates and drives the turntable portion 562 and the drive axle body 700 to rotate.

[0028] In one embodiment, as shown in Figures 1-6, the rotary connection includes an outer central shaft 563 and an external gear 564 mounted on the outer central shaft 563. The outer central shaft 563 is fixedly connected to the center of the end face of the turntable 562. The rotary action unit 600 includes a guide rod frame 610 and a guide rack 620. The guide rack 620 is located on the side of the supporting oval side plate 200 and is arranged along its length. The end of the guide rack 620 has a support arm 640, which is fixedly connected to the supporting crossbeam 310. The guide rack 620 is located on the upper end face of the guide rod frame 610, and the length of the guide rack 620 is less than the length of the guide rod frame 610. When the end face of the guide rack 620 abuts against the end of the drive axle body 700, the guide rack 620 is positioned on the external gear 564. On the travel path, and can mesh with it; in this embodiment of the invention, during spraying, the end face of the guide rack 620 abuts against the end of the drive axle body 700, the support mechanism 500 moves to the rotation action unit 600, the external gear part 564 is in a meshing state with the guide rack 620, since the external gear part 564 moves with the guide rack 620, the external gear part 564 rotates, the outer central shaft 563 and the turntable part 562 both rotate, so that the drive axle body 700 rotates; when the external gear part 564 moves to the end of the guide rack 620 and disengages from it, the adjusting cylinder 580 drives the outer ring frame 561 and the turntable part 562 away from the support part 510, the turntable part 562 releases the end of the drive axle body 700, so that the drive axle body 700 can be gripped and unloaded by the robot.

[0029] In one embodiment, as shown in Figures 1-6, the end of the guide rod frame 610 is further provided with a discharge sensing block 630. The discharge sensing block 630 is located on the travel path of the external gear part 564 after the turntable part 562 releases the drive axle body 700. When the external gear part 564 passes by the discharge sensing block 630, the discharge sensing block 630 generates a sensing signal. In this embodiment of the invention, after the external gear part 564 disengages from the guide rack 620, the adjusting cylinder 580 drives the turntable part 562 away from the end of the drive axle body 700 and disengages from it. The external gear part 564 moves in the width direction of the belt conveyor 100. At this time, the discharge sensing block 630 is on the travel path of the external gear part 564. When the external gear part 564 passes by the discharge sensing block 630, the discharge sensing block 630 generates a sensing signal and transmits it to the main controller. The main controller can control the robot or other equipment to remove the drive axle body 700 to complete the discharge.

[0030] In one embodiment, as shown in Figures 1-6, the frame support leg 440 is provided with a protrusion 450, and the lower spraying actuation unit 570 includes a lower movable seat 571 and a lever 573. The lower movable seat 571 is slidably mounted on the outer frame 550, and its upper surface is provided with a lower rack 572. The lever 573 is located at one end of the lower movable seat 571 and points towards the frame support leg 440. The outer frame 550 is also provided with a transmission shaft 590 located between the abutment support 565 and the lower movable seat 571. The transmission shaft 590 is rotatable and is provided with a transmission gear 591. The lower end face of the abutment support 565 is provided with an upper rack 569, and both the upper rack 569 and the lower rack 572 mesh with the transmission gear 591. In this embodiment of the invention, the adjusting cylinder 580 drives the abutment support by telescoping. 565 moves relative to the support 510 to achieve tightening and loosening of the end of the drive axle body 700. The upper rack 569 moves with the support 565. Under the meshing transmission of the transmission gear 591, the lower movable seat 571 can move synchronously and in opposite directions. The lever 573 moves with the lower movable seat 571. When the turntable 562 abuts against the end of the drive axle body 700, the lever 573 corresponds to the protrusion 450 on the same side and can move the protrusion 450. When the turntable 562 disengages from the end of the drive axle body 700, the lever 573 is misaligned with the protrusion 450. Thus, when the entire support mechanism 500 moves, the beam-type spraying assembly 400 is no longer subjected to thrust and automatically returns to the initial position under the elastic force of the return spring 460.

[0031] The above-described embodiments of the invention provide a spraying device for surface processing of a drive axle, the working principle of which is as follows: the drive axle body 700 is placed on a pair of support mechanisms 500 located at the starting end of the support-type oval side plate 200 by a robot or a handling device, and the two ends of the drive axle 700 fall into the semi-circular support grooves 520 of the support portion 510 respectively.

[0032] The weight of the drive axle 700 acts on the ball bearings 530 within the semi-circular support groove 520. A pressure sensor on the surface of the ball bearings detects a pressure signal and transmits it to the main controller. The main controller then controls the adjusting cylinder 580 to move the rotating clamping unit 560 towards the end of the drive axle 700. The clamping block 567 on the end face of the turntable 562 automatically clamps the end of the drive axle 700 under the action of the inclined surface and the clamping spring 568, achieving automatic centering and circumferential limiting, preparing for subsequent rotation.

[0033] When the motor starts, the conveyor belt 100 moves cyclically. Through the connection between the moving link 540 and the transverse fixing rod inside the belt, the supporting mechanism 500 moves synchronously with the belt, driving the drive axle 700 to move towards the end of the conveyor.

[0034] When the supporting mechanism 500 moves to the area of ​​the rotating action unit 600, the external gear 564 at the top of the rotating abutment unit 560 engages with the guide rack 620 fixed on the guide rod frame 610.

[0035] Since the guide rack 620 is fixed, the moving support mechanism 500 forces the external gear part 564 to rotate, which in turn drives the turntable part 562 and the clamped drive axle body 700 to rotate continuously around its axis via the external central shaft 563.

[0036] While the rotating clamping unit 560 moves toward the end of the drive axle 700 to clamp, the lower spraying actuation unit 570 moves synchronously in the opposite direction through the meshing transmission of the upper rack 569, the transmission gear 591 and the lower rack 572. Its lever 573 extends out and engages with the protrusion 450 on the frame leg 440 of the beam-type spraying assembly 400.

[0037] When the support mechanism 500 moves, the lever 573 pushes the protrusion 450, causing the entire beam-type spraying assembly 400, including the spraying gantry 410, the spraying chamber 420, and the spraying hood 430, to move synchronously with the support mechanism 500.

[0038] During the simultaneous movement and rotation, the paint in the spraying chamber 420 is continuously sprayed downwards through multiple nozzles at the bottom of the spraying hood 430, evenly covering the entire outer surface of the rotating drive axle 700, ensuring no dead corners in the spraying process.

[0039] When the support mechanism 500 moves to the end of the guide rack 620, the external gear 564 disengages from it, and the drive axle 700 stops rotating. At the same time, the beam-type spraying assembly 400 has reached the end of its stroke.

[0040] After the external gear 564 disengages, the adjusting cylinder 580 reverses its action, pulling the rotating clamping unit 560 away from the end of the drive axle 700, and the clamping block 567 releases its grip on the drive axle 700.

[0041] When the rotating clamping unit 560 retracts, the lower spraying actuation unit 570 is retracted via the transmission mechanism, and the lever 573 disengages from the protrusion 450 of the frame support leg 440. Under the tension of the return spring 460, the beam-type spraying assembly 400 automatically slides back to its initial position, ready to spray the next drive axle 700.

[0042] The external gear 564 passes the unloading sensor block 630 in the return path and generates a sensing signal that is transmitted to the main controller. The main controller controls the robot or handling device to remove the painted drive axle 700 from the support mechanism 500, thus completing the unloading.

[0043] Some of the paint that is not attached to the drive axle 700 falls onto the surface of the belt conveyor 100, moves with the belt to the end, is scraped off by the scraper 800, and is collected by the guide chute 810, reducing waste and pollution.

[0044] In summary, this invention achieves automatic conveying of the drive axle 700 through the linkage of the support mechanism 500 and the conveyor belt 100. The rotation unit 600, in conjunction with the end-clamping component, forces the drive axle 700 to rotate within the spraying area. Combined with the synchronous following movement of the beam-type spraying assembly 400, efficient, uniform, and automated spraying of the drive axle 700's outer surface is achieved. Throughout the entire process, loading, clamping, rotation, spraying, releasing, resetting, and unloading are all completed automatically, significantly improving spraying efficiency and quality.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spraying device for surface processing of a drive axle, comprising a main frame, a beam-type spraying assembly, and two supporting oval side plates; a belt conveyor is mounted on the main frame, the belt conveyor being driven by a motor to achieve cyclic movement of the belt; the two supporting oval side plates are respectively disposed on both sides of the belt conveyor, characterized in that... Each supporting oval side plate is equipped with multiple supporting mechanisms that can slide cyclically around its edge. The supporting mechanisms on two supporting oval side plates correspond one-to-one and support both ends of the drive axle body respectively. Each supporting mechanism includes a support portion and an end abutment component. The support portion is slidably disposed on the edge of the supporting oval side plate, and its upper end has a semi-circular groove portion that supports one end of the drive axle body in a rolling contact manner. The support portion is connected to a transverse fixing rod inside the belt body. The end abutment component is disposed on the side of the support portion and can move along the width direction of the supporting oval side plate to abut and release the end of the drive axle body. The main frame has two supporting crossbeams disposed along the length direction of the belt conveyor component. The two supporting crossbeams are respectively positioned... Rotation units are provided on both sides of the conveyor belt. When the outer end of the end-clamping component contacts the rotation unit and moves along the edge of the supporting oval side plate, the rotation unit can act on the drive axle body through the end-clamping component, causing the drive axle body to rotate. The beam-type spraying assembly is set across the conveyor belt and is located on the upper side of the conveyor belt. The two ends of the beam-type spraying assembly are slidably connected to two supporting beams respectively. The beam-type spraying assembly is used to spray paint downward. When the supporting mechanism moves to the lower side of the beam-type spraying assembly, the beam-type spraying assembly can move with the supporting mechanism. When the end-clamping component disengages from the rotation unit, the beam-type spraying assembly automatically returns to the initial position.

2. The spraying device for surface processing of a drive axle according to claim 1, characterized in that, The beam-type spraying assembly includes a spraying gantry and a spraying chamber. The spraying gantry is located on the upper side of the conveyor belt, and both ends are provided with frame legs. The frame legs are slidably connected to the supporting beam on the same side. The frame legs are connected to the end of the main frame of the rotating action unit through a return spring. The spraying chamber is located at the upper end of the spraying gantry and is used to store the spraying liquid. The lower surface of the spraying gantry is provided with a spraying hood, and the inside of the spraying hood has multiple nozzles evenly distributed along the length of the spraying gantry. The nozzles are connected to the spraying chamber and spray the spraying liquid downwards.

3. The spraying device for surface processing of a drive axle according to claim 1, characterized in that, The inner wall of the semi-circular support is provided with a plurality of circumferentially distributed ball bearings, which can rotate freely and have pressure sensors on their surfaces. The pressure sensors are electrically connected to the end abutment components through a central controller. The side of the support facing the belt conveyor is provided with at least one movable connecting rod, which is connected to the transverse fixed rod inside the belt.

4. The spraying device for surface processing of a drive axle according to claim 2, characterized in that, An outer frame is provided on the side wall of the support portion away from the conveyor belt. The end clamping component includes a rotating clamping unit, a lower spraying actuation unit, and an adjusting cylinder. The rotating clamping unit is located on the side of the support portion, and its bottom is slidably connected to the outer frame. The adjusting cylinder is fixed on the side wall of the support portion, and one end of its cylinder is connected to the rotating clamping unit. The rotating clamping unit has a disc-shaped internal structure and is used to clamp the end of the drive axle body. The top of the rotating clamping unit can be connected to the rotating action unit, and when moving, it drives the drive axle body to rotate under the action of the rotating action unit. The lower spraying actuation unit is slidably provided at the bottom of the outer frame. The outer frame is connected to the bottom of the rotating clamping unit. The lower spraying actuation unit and the rotating clamping unit move synchronously in opposite directions. The lower spraying actuation unit can be connected to the frame support leg and actuate its movement.

5. The spraying apparatus for surface processing of a drive axle according to claim 4, characterized in that, The rotating clamping unit includes an outer ring frame and a turntable. The center of the outer ring frame and the center of the semi-circular support are on a straight line. A clamping support is fixed to the arc bottom of the outer ring frame. The clamping support is slidably connected to the outer frame and fixedly connected to the end of the adjusting cylinder. The turntable is rotatably located inside the outer ring frame. Multiple circumferentially distributed radial grooves are opened on its end face facing the support. A slidable clamping block is inside each radial groove. The end face of the clamping block facing the turntable is inclined. The clamping block is connected to the inner end wall of the radial groove by a clamping spring. The end face of the turntable away from the support has a rotating connection part, which can be connected to the rotating action unit.

6. The spraying apparatus for surface processing of a drive axle according to claim 5, characterized in that, The rotating connection part includes an outer central shaft and an external gear part mounted on the outer central shaft. The outer central shaft is fixedly connected to the center of the end face of the turntable part. The rotating action unit includes a guide rod frame and a guide rack. The guide rack is located on the side of the supporting oval side plate and is arranged along its length. The end of the guide rack has a support arm, which is fixedly connected to the supporting crossbeam part. The guide rack is located on the upper end face of the guide rod frame, and the length of the guide rack is less than the length of the guide rod frame. When the end face of the guide rack abuts against the end of the drive axle body, the guide rack is on the travel path of the external gear part and can mesh with it.

7. The spraying apparatus for surface processing of a drive axle according to claim 6, characterized in that, The end of the guide rod frame is also provided with a material unloading sensor block, which is located on the travel path of the external gear part after the turntable part releases the drive axle body; when the external gear part passes by the material unloading sensor block, the material unloading sensor block generates a sensing signal.

8. The spraying apparatus for surface processing of a drive axle according to claim 5, characterized in that, The frame support legs are provided with protrusions, and the lower spraying actuation unit includes a lower movable seat and a lever; the lower movable seat is slidably mounted on the outer frame, and a lower rack is provided on its upper surface; the lever is located at one end of the lower movable seat and points towards the frame support leg; the outer frame is also provided with a transmission shaft located between the abutment support and the lower movable seat, the transmission shaft is rotatable, and a transmission gear is provided on it; an upper rack is provided on the lower end face of the abutment support, and both the upper and lower racks mesh with the transmission gear.

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