Chain lifting device applied to electrophoretic swing of super-long workpiece

Abstract

The application relates to the technical field of industrial product surface treatment, in particular to a chain type lifting device applied to an electrophoresis swing station for super-long workpieces. The chain type lifting device applied to the electrophoresis swing station for super-long workpieces comprises an electrophoresis pool and a swing mechanism. The swing mechanism comprises at least one pair of swing assemblies. Each swing assembly comprises a fixed chain wheel, a lifting chain wheel, a chain and a counterweight. The chain is a pin shaft chain structure, and first and second sealing cavities are formed at the hinged portions of chain links. A one-way valve is arranged at the boundary, and a piston is arranged on the inner chain plate. The first end of the piston is sealed and slidably inserted into the first sealing cavity, and the first sealing cavity is divided into two sub-cavities which are not communicated with each other. The second end of the piston can be sealed and slidably inserted into the second sealing cavity. When the outer chain plate and the inner chain plate rotate relative to each other, the piston can compress the second sealing cavity, and then the lubricating oil can be pressed into the hinged portions of the outer chain plate and the inner chain plate, so that the lubricating effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of industrial product surface treatment technology, and in particular to a chain lifting device for electrophoretic oscillation of ultra-long workpieces. Background Technology

[0002] Electrophoresis, a physical phenomenon based on the directional migration of charged particles in an electric field, operates on the principle that charged particles, when placed in an electric field, are driven by the electric force to move towards the electrode with the opposite polarity of their charge. This principle has demonstrated significant value in industrial production and materials science, particularly in electrophoretic coating processes. Under the influence of an electric field, charged particles within the coating material can precisely migrate and deposit on the workpiece surface, forming a uniform and protective coating that significantly improves the workpiece's corrosion resistance and appearance.

[0003] When performing electrophoretic coating on extra-long workpieces, to ensure coating uniformity and avoid bubble formation, the industry commonly uses a swinging station to suspend the workpieces. The regular swinging motion of the workpiece during electrophoresis optimizes the contact between the coating and the workpiece surface. The key to this process lies in the design of the supporting equipment. For example, the electrophoresis device disclosed in Chinese Patent CN207646311U mainly includes an electrophoresis tank, a bracket for suspending the extra-long workpiece, and support frames extending from both sides of the electrophoresis tank. The bracket's two ends are connected to the support frames on both sides, and at least one side of the support frame has a sliding cantilever. The base of the sliding cantilever is vertically slidably connected to the support frame and driven by a traction mechanism. This traction mechanism consists of a drive motor and a chain connected to the motor's output shaft. The chain pulls the sliding cantilever up and down, causing at least one end of the bracket to undulate, ultimately achieving the swinging motion of the extra-long workpiece.

[0004] However, the aforementioned electrophoresis device revealed significant technical deficiencies in actual operation, primarily concerning the lubrication and maintenance of the chain drive system. During high-frequency reciprocating motion, the contact points between chain links generate substantial frictional resistance, increasing energy consumption and accelerating component wear. Therefore, real-time lubrication is essential to ensure stable system operation. Current lubrication methods, such as dripping or spraying, only allow the lubricant to adhere to the chain surface, failing to penetrate critical friction points like the chain link hinges. This significantly reduces lubrication effectiveness, leaving the friction surfaces in a state of dry or semi-dry friction due to ineffective lubrication, further accelerating component wear.

[0005] More importantly, during frequent operation, the heat generated by friction at the friction points causes the local temperature to rise continuously. Key performance parameters of lubricating oil, such as viscosity and fluidity, are extremely sensitive to temperature changes. Increased temperature leads to a decrease in lubricating oil viscosity and a weakening of its oiliness, significantly reducing its ability to form an effective oil film on the friction surface. It can even cause oxidation and deterioration of the lubricating oil due to high temperatures, resulting in the loss of its lubricating function. This vicious cycle of "insufficient lubrication - increased friction - increased temperature - lubrication failure" not only shortens the chain's lifespan but can also cause interruptions in the electrophoretic coating process due to equipment failure, affecting production efficiency and product quality stability. Summary of the Invention

[0006] Therefore, it is necessary to provide a chain lifting device for electrophoretic swaying of ultra-long workpieces to address the problem of poor production continuity in the current electrophoretic coating process for ultra-long workpieces.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A chain lifting device for electrophoretic swaying of ultra-long workpieces, comprising an electrophoretic pool and a swaying mechanism.

[0009] The swing mechanism includes at least one pair of swing components, which are symmetrically arranged on both sides of the electric pool. Each swing component includes a fixed sprocket, a lifting sprocket, and a chain. The fixed sprocket is mounted on the electric pool and can rotate around its own axis. The lifting sprocket is mounted on the electric pool and can rotate along its own axis and move up and down in the vertical direction. One end of the chain is fixed to the electric pool, and the other end passes through the lifting sprocket and the fixed sprocket in sequence, and is then fixed with a counterweight, which is suspended in the air. A support frame is provided on the lifting sprocket. The support frame can rotate relative to the lifting sprocket and can move synchronously with the lifting sprocket in the vertical direction, and is configured to support extra-long workpieces.

[0010] The chain is a pin chain structure, and a first sealing cavity and a second sealing cavity are formed at the hinge of the chain links. A one-way valve is provided at the boundary between the first sealing cavity and the second sealing cavity. The opening direction of the one-way valve is from the first sealing cavity to the second sealing cavity. A piston is provided on the inner chain plate. The first end of the piston is sealed and slidably inserted into the first sealing cavity, dividing the first sealing cavity into two non-communicating sub-cavities. The second end of the piston can be sealed and slidably inserted into the second sealing cavity. The second sealing cavity has an open state and a closed state. When it is in the open state, the second sealing cavity is connected to the outside and is configured to receive lubricating oil.

[0011] Furthermore, a filter element is inserted into the second sealed cavity, and the filter element is configured to filter lubricating oil.

[0012] Furthermore, when the second end of the piston is inserted into the second sealing cavity and moves inward to its limit position, it forms a stop engagement with the filter element.

[0013] Furthermore, the position of the first end of the piston within the first sealed chamber can be changed.

[0014] Furthermore, the chain includes multiple outer chain plates, which are spaced apart along the extension direction of the chain. The outer chain plates of the same pair are opposite each other and spaced apart, and each pair is fitted with two pins with an interference fit. Two inner chain plates are rotatably sleeved on two adjacent pins on different outer chain plates, and the two inner chain plates are opposite each other and spaced apart. A sleeve is rotatably sleeved on each pin, and both ends of the sleeve are simultaneously inserted into the two inner chain plates with an interference fit. A roller is rotatably sleeved on each sleeve. A first sealing cavity and a second sealing cavity are formed at the hinge of the outer chain plate and the inner chain plate.

[0015] Furthermore, the counterweight has a block-shaped structure.

[0016] Furthermore, the one-way valve has a magnetic suction structure.

[0017] Furthermore, the check valve has a spring-loaded structure.

[0018] Furthermore, the oscillating mechanism also includes at least one pair of drive components configured to provide a driving force for rotating the fixed sprocket.

[0019] Furthermore, when there are multiple pairs of swing components, adjacent drive components on the same side share a single drive source.

[0020] The beneficial effects of this invention are:

[0021] This invention relates to a chain lifting device for electrophoretic oscillation of ultra-long workpieces. By setting up a first and second sealing chamber, and cooperating with a one-way valve and piston, during the relative rotation of the outer and inner chain plates, the positional change of the piston causes the first and second sealing chambers to exhibit opposite air pressure states: when the second sealing chamber is under positive pressure, lubricating oil can more easily penetrate into key friction points such as the hinges of the inner and outer chain plates, thus ensuring lubrication and extending the chain's service life; when the first sealing chamber is under positive pressure, the one-way valve opens, and the hot air in both the first and second sealing chambers can be discharged to the outside under the push of the piston. This achieves active heat dissipation and reduces the impact of high temperatures on lubricating oil performance, thereby preventing interruptions in the electrophoretic coating process due to equipment failure and ensuring production continuity.

[0022] Furthermore, by setting up a filter element, the lubricating oil can be filtered, and external impurities can be kept out, preventing these impurities from entering the chain and causing increased wear. At the same time, when the first sealing chamber is under positive pressure, the filter element can be backflushed by air, thereby achieving self-cleaning. Attached Figure Description

[0023] Figure 1 A three-dimensional structural schematic diagram of a chain lifting device for electrophoretic swinging of ultra-long workpieces provided in an embodiment of the present invention;

[0024] Figure 2 This is a side view of the chain lifting device for electrophoretic oscillation of ultra-long workpieces provided in an embodiment of the present invention;

[0025] Figure 3 This is a front view structural schematic diagram of a chain lifting device for electrophoretic swinging of ultra-long workpieces provided in an embodiment of the present invention;

[0026] Figure 4 A three-dimensional structural diagram of the chain of the chain lifting device applied to the electrophoretic oscillation of ultra-long workpieces provided in an embodiment of the present invention;

[0027] Figure 5 This is an exploded view of the chain components of a chain lifting device for electrophoretic oscillation of ultra-long workpieces, provided in an embodiment of the present invention.

[0028] Figure 6 A three-dimensional structural diagram of the outer chain plate of the chain in a chain lifting device for electrophoretic oscillation of ultra-long workpieces provided in an embodiment of the present invention;

[0029] Figure 7 A three-dimensional structural diagram of the inner chain plate of the chain in a chain lifting device for electrophoretic oscillation of ultra-long workpieces, provided in an embodiment of the present invention;

[0030] Figure 8 A side view of the chain structure of the chain lifting device for electrophoretic oscillation of ultra-long workpieces provided in an embodiment of the present invention;

[0031] Figure 9 for Figure 8 Sectional view along the AA direction;

[0032] Figure 10 for Figure 9 A magnified schematic diagram of the structure at point Y in the middle;

[0033] Figure 11 for Figure 9 A magnified schematic diagram of the structure at point Z in the middle.

[0034] in:

[0035] 1. Electric swimming pool;

[0036] 2. Swinging mechanism; 21. Swinging assembly; 211. Fixed sprocket; 212. Lifting sprocket; 213. Chain; 2131. Outer chain plate; 21311. Ring groove; 21312. Frustum; 21313. First hinge hole; 21314. Sealing element; 2132. Pin; 2133. Inner chain plate; 21331. Second hinge hole; 21332. Fixed platform; 2134. First sealing cavity; 2135. Second sealing cavity; 2136. One-way valve; 2137. Piston; 2138. Filter element; 2139. Sleeve; 2140. Roller; 214. Counterweight; 215. Support frame; 22. Drive assembly; 221. Drive motor; 222. Commutator; 223. Rotating shaft; 224. Sliding bearing seat;

[0037] 3. The white body of the bus. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They 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, and therefore should not be construed as limiting the invention.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] The following reference Figures 1 to 11The present invention describes a chain lifting device for electrophoretic swaying of ultra-long workpieces, which is particularly suitable for electrophoretic coating of ultra-long workpieces, such as a single piece of steel or the body-in-white of a bus. Of course, it is also suitable for electrophoretic coating of other workpieces.

[0042] Specifically, the chain lifting device used for electrophoretic swaying of ultra-long workpieces is configured to include an electrophoretic pool 1 and a swaying mechanism 2. The electrophoretic pool 1 is a box-like structure with an open top and is filled with electrophoretic fluid during use. The swaying mechanism 2 includes at least one pair of swaying components 21. The same pair of swaying components 21 are symmetrically arranged on the left and right sides of the electrophoretic pool 1 and are used to drive the white body 3 of the same bus to sway. When the swaying mechanism 2 includes multiple pairs of swaying components 21, the multiple pairs of swaying components 21 are arranged at intervals in the front-back direction and can sway multiple white bodies 3 of buses respectively, thereby improving the efficiency of electrophoretic coating.

[0043] Taking the swing mechanism 2 as an example, which includes a pair of swing components 21, symmetrically arranged on the left and right sides of the electric pool 1, each including a fixed sprocket 211, a lifting sprocket 212, and a chain 213. Taking the swing component 21 on the right side as an example, the fixed sprocket 211 is located on the right side wall of the electric pool 1, with its axis extending horizontally in the front-back direction and capable of rotating around its own axis; the lifting sprocket 212 is located on the right side wall of the electric pool 1, with its axis extending horizontally in the front-back direction and located to the left of the fixed sprocket 211. Through its cooperation with the electric pool 1, it can both rotate along its own axis and move up and down in the vertical direction; one end of the chain 213 is fixed to the top of the electric pool 1, then extends vertically downward to the left side of the lifting sprocket 212, then bends into a U-shape, passes around the bottom of the lifting sprocket 212, then extends vertically upward to the left side of the fixed sprocket 211, then bends into an inverted U-shape, and extends from the fixed sprocket 211... The chain 213 passes over the top and extends vertically downwards, with a counterweight 214 fixed at the end. The counterweight 214 is suspended and ensures that the chain 213 is always taut. The chain 213 also forms a transmission connection with the lifting sprocket 212 and the fixed sprocket 211. A support frame 215 is provided on the lifting sprocket 212. The support frame 215 can rotate relative to the lifting sprocket 212 to avoid affecting the normal rotation of the lifting sprocket 212, and can also move synchronously with the lifting sprocket 212 in the vertical direction. A groove is provided at the contact position between the support frame 215 and the white body 3 of the bus. The groove has a V-shaped structure and a rounded bottom. During installation, the roller structure of the white body 3 of the bus is movably inserted into the groove, so that it can be supported by the support frame 215. Optionally, the counterweight 214 can be set as a block structure.

[0044] To enable the lifting sprocket 212 to rotate along its own axis and move vertically, two sliding grooves are provided on the electric pool 1. These grooves are arranged side-by-side with intervals along the front-back direction and both extend vertically. During installation, the two axles of the lifting sprocket 212 are movably inserted into the two sliding grooves. With the cooperation between the axles and the grooves, the lifting sprocket 212 has both rotational and vertical sliding freedom. To enable the support frame 215 to rotate relative to the lifting sprocket 212 and move synchronously with it vertically, the bottom end of the support frame 215 is rotatably sleeved on one of the axles, allowing the support frame 215 and the lifting sprocket 212 to rotate relative to each other. A sliding protrusion is fixedly provided on the support frame 215, which slides into the sliding groove during installation, giving the support frame 215 vertical sliding freedom.

[0045] During the electrophoresis process, the two roller-shaped structures of the bus's body-in-white 3 are first placed in the grooves of the side support brackets 215. Then, two fixed sprockets 211 are driven to rotate reciprocally, with the rotation directions of the two fixed sprockets 211 being opposite. During the rotation of the fixed sprockets 211, the chain 213 and the lifting sprocket 212 drive the lifting sprocket 212 and the support brackets 215 to periodically rise and fall. Because the two fixed sprockets 211 rotate in opposite directions, when one side of the support bracket 215 rises, the other side of the support bracket 215 falls, thus causing the bus's body-in-white 3 to present a state where one side is higher than the other. With the periodic rise and fall of the support brackets 215, the bus's body-in-white 3 ultimately achieves a swaying motion, thereby ensuring coating uniformity, preventing bubble formation, and improving the paint finish.

[0046] However, in the aforementioned process, chain 213 needs to reciprocate at high frequency to achieve the regular swaying of the bus's body-in-white 3. This continuous dynamic operation inevitably generates continuous friction between the chain links of chain 213 and at the contact points between the chain links and the pin 2132: when the chain links rotate around the pin 2132, the relative movement of the contact surfaces creates a combination of sliding and rolling friction, resulting in a significant increase in frictional resistance. This frictional resistance not only consumes additional energy from the drive system, causing energy consumption to rise, but also exacerbates the material wear of the contact surfaces—the contact area between the chain links and the pin 2132 undergoes microscopic deformation and metal fatigue due to repeated stress, and long-term operation will lead to an increase in the clearance, destroying the stability of the chain 213 transmission. Therefore, in order to maintain the normal working condition of chain 213, it is necessary to continuously replenish lubricating oil to form an oil film on the friction surfaces to isolate the contact surfaces and reduce the coefficient of friction.

[0047] Existing lubrication methods have structural defects: dripping or spraying only covers the outer surface of the chain 213, leaving critical friction points such as chain link hinges in a closed or semi-closed state. External lubricating oil struggles to overcome surface tension and structural barriers to penetrate the contact interface. This results in insufficient lubrication of the friction surfaces, preventing the effective formation or maintenance of an oil film and leading to direct metal-to-metal contact, resulting in dry or semi-dry friction. Under these conditions, the coefficient of friction increases significantly, further accelerating the wear rate and causing localized temperature build-up due to the inability to dissipate heat generated by friction through the oil film.

[0048] The rise in temperature creates a vicious cycle that damages the lubrication system: the core performance of lubricating oil depends on its viscosity and oiliness within a specific temperature range. Increased temperature weakens the intermolecular forces of the lubricating oil, significantly reducing its viscosity and lowering the oil film's load-bearing capacity, making it unable to withstand the pressure of the friction surface and prone to rupture. Simultaneously, high temperatures accelerate the oxidation process of the lubricating oil, altering its chemical structure, gradually degrading its oiliness, and continuously diminishing its lubrication efficiency. Degraded lubricating oil not only fails to lubricate, but its oxidation products may also form gum or carbon deposits, adhering to the friction surface and further hindering the penetration of new lubricating oil. This vicious cycle of "insufficient lubrication leading to increased friction, increased friction causing increased temperature, and increased temperature accelerating lubrication failure" continuously shortens the service life of chain 213 and may cause equipment failures such as jamming and breakage due to excessive wear of chain 213. This directly leads to the interruption of the electrophoretic coating process, disrupting production continuity and affecting the stability of the product coating quality—the body-in-white of the bus may experience defects such as uneven coating thickness and residual bubbles due to swaying interruptions, reducing the protective performance and appearance quality of the final product.

[0049] Based on this, in the chain lifting device for electrophoretic oscillation of ultra-long workpieces provided in the embodiments of the present invention, the chain 213 is configured as a pin chain structure, and includes multiple outer chain plates 2131 and multiple inner chain plates 2133. The multiple outer chain plates 2131 and multiple inner chain plates 2133 are arranged alternately along the extension direction of the chain 213. The outer chain plates 2131 of the same pair are arranged opposite each other and spaced apart in the front-back direction. Two annular grooves 21311 are symmetrically opened on the inner sidewall of each outer chain plate 2131. A frustum 21312 is formed at the center of each annular groove 21311. A first hinge hole 21313 is coaxially opened on each frustum 21312. A pin 2132 is interference-fitted into the first hinge hole 21313. During installation, the two ends of the same pin 2132 are respectively interference-fitted into the same pair of outer chain plates. The inner chain plates 2133 are arranged opposite each other and spaced apart in the front-to-back direction, and are all located inside the outer chain plates 2131. Two second hinge holes 21331 are symmetrically opened on the inner sidewall of each inner chain plate 2133. When the inner chain plate 2133 is installed, the two second hinge holes 21331 on it are respectively rotated and sleeved on two adjacent pins 2132 on different outer chain plates 2131. A sleeve 2139 is rotated and sleeved on each pin 2132. The two ends of the sleeve 2139 are respectively interference-fitted into the two second hinge holes 21331 on the same pair of inner chain plates 2133. A roller 2140 is rotated and sleeved on each sleeve 2139. The roller 2140 and the fixed sprocket 211 and the lifting sprocket 212 form a transmission cooperation.

[0050] The outer wall of the inner chain plate 2133 forms an annular installation space between the annular groove 21311, the frustum 21312, and the outer chain plate 2131. A sealing element 21314 is provided in this installation space. The sealing element 21314 is an arc-shaped strip structure, coaxially arranged with the annular groove 21311, and spaced apart from the frustum 21312. The sealing element 21314 is fixedly connected to the outer chain plate 2131. One end of the sealing element 21314 is bent inward and seals against the circumferential side wall of the frustum 21312. A one-way valve 2136 is also provided in this installation space. The one-way valve 2136 is located near the middle of the sealing element 21314 and divides the installation space into two sub-spaces. The sub-space closer to the bend of the sealing element 21314 is the first sealing cavity 2134, and the sub-space further away from the bend of the sealing element 21314 is the first sealing cavity 2134. The space between the two is a second sealing cavity 2135. The opening direction of the one-way valve 2136 is from the first sealing cavity 2134 to the second sealing cavity 2135. A fixing platform 21332 is also provided in this installation space. The fixing platform 21332 and the one-way valve 2136 are arranged approximately opposite each other and fixed on the outer wall of the inner chain plate 2133. A piston 2137 is provided on the fixing platform 21332. The piston 2137 has a semi-arc-shaped structure and is coaxially arranged with the second hinge hole 21331. One end of the piston 2137 passes through the bend of the closure member 21314 and is slidably inserted into the first sealing cavity 2134, dividing the first sealing cavity 2134 into two non-communicating sub-cavities. The other end of the piston 2137 can be slidably inserted into the second sealing cavity 2135. The second sealing cavity 2135 has an open state and a closed state, such as... Figure 10 As shown, when in the open state, the second sealing cavity 2135 is connected to the outside and is configured to receive lubricating oil, such as... Figure 11 As shown, when in the closed state, the second sealing chamber 2135 is isolated from the outside. Optionally, the one-way valve 2136 can be configured as a magnetic type.

[0051] Initially, the outer link plate 2131 and the inner link plate 2133 are located on the same vertical line; as Figure 11 As shown, at this time, the second sealing cavity 2135 is in a closed state and is isolated from the outside.

[0052] During use, the fixed sprocket 211 is in Figure 9Taking the synchronous clockwise movement of chain 213 as an example, during the movement of chain 213, the outer chain plate 2131 and the inner chain plate 2133 rotate relative to each other at pin 2132. During this relative rotation, with the outer chain plate 2131 as a reference, the inner chain plate 2133 first rotates clockwise around pin 2132, synchronously driving piston 2137 to rotate clockwise. During the rotation of piston 2137, on the one hand, the second sealing cavity 2135 switches from a closed state to an open state, and the opening between piston 2137 and sealing member 21314 gradually increases. On the other hand, one end of piston 2137 continuously penetrates into the first sealing cavity 2134. This movement compresses the sub-cavity space between the end of piston 2137 and one-way valve 2136. The air in this sub-cavity is compressed due to the reduced volume, and the air pressure gradually increases. Since the opening direction of the one-way valve 2136 is limited to the direction from the first sealing cavity 2134 to the second sealing cavity 2135, and its sealing performance in the closed state depends on the magnetic attraction force between the valve core and the valve body, when the air pressure in the first sealing cavity 2134 rises to a certain level, the air pressure difference between the end of the piston 2137 and the one-way valve 2136 will break through the magnetic attraction threshold of the one-way valve 2136, pushing the valve core to separate from the valve body, and the one-way valve 2136 will open accordingly, so that the sub-cavity of the first sealing cavity 2134 and the second sealing cavity 2135 form a communication channel.

[0053] As the piston 2137 continues to penetrate deeper into the first sealing chamber 2134, the compressed hot air in the sub-chamber rushes into the second sealing chamber 2135 through the one-way valve 2136, further pushing the air in the second sealing chamber 2135 to be discharged to the outside. This process reduces the ambient temperature inside the chain 213 by actively discharging the high-temperature air generated by the friction parts during operation, thereby reducing the adverse effects of high temperature on the lubricating oil—preventing the lubricating oil from abnormally decreasing viscosity, losing its oily components, or oxidizing and deteriorating due to continuous high temperature, and ensuring the lubricating oil's ability to form an effective oil film on the friction surface.

[0054] Thus, the active heat dissipation mechanism driven by mechanical motion breaks the vicious cycle of "friction heat generation - heat accumulation - lubrication failure" in traditional lubrication systems, maintains a stable lubrication state at key friction points of chain 213, reduces excessive wear of components caused by insufficient lubrication, thereby reducing the risk of equipment failure and ensuring the continuous operation of electrophoretic coating process.

[0055] During the operation of chain 213, when the opening between piston 2137 and sealing member 21314 is open, lubricating oil can enter the second sealing chamber 2135 through the opening. When the opening is opened to its maximum extent, as the fixed sprocket 211 continues to rotate, the inner chain plate 2133 rotates counterclockwise around the pin 2132, synchronously driving piston 2137 to rotate counterclockwise.

[0056] During this rotation, the relative positions of piston 2137 and sealing member 21314 change: First, the opening between them gradually narrows until it closes, causing the second sealing cavity 2135 to switch from an open state to a closed state, forming a relatively sealed space. Subsequently, one end of piston 2137 continues to be inserted into the second sealing cavity 2135, causing the volume of the second sealing cavity 2135 to be compressed and continuously reduced, and the internal air pressure to increase significantly due to the limited space. Since the opening direction of the one-way valve 2136 is limited to from the first sealing cavity 2134 to the second sealing cavity 2135, the high pressure inside the second sealing cavity 2135 cannot push the one-way valve 2136 to open, ensuring that the pressure inside the second sealing cavity 2135 will not leak out.

[0057] Under the influence of the high pressure differential, the lubricating oil in the second sealing cavity 2135 gains a directional driving force: the lubricating oil flows along the side wall of the frustum 21312 towards the gap between its end face and the outer wall of the inner chain plate 2133, forming a lubricating layer in this area; it then continues to penetrate inward, reaching the hinge joints between the outer chain plate 2131 and the pin 2132, and between the inner chain plate 2133 and the pin 2132. This process breaks through the limitation of traditional lubrication methods where the lubricating oil only stays on the surface of the chain 213. By using the cavity pressure, the lubricating oil is precisely pushed to the key friction parts, ensuring that an effective oil film can be formed on the friction surface, fundamentally improving the lubrication effect.

[0058] Simultaneously, the other end of piston 2137 is gradually pulled out from the first sealing cavity 2134, expanding the volume of the sub-cavity between this end and the one-way valve 2136, thus reducing the internal pressure. Under the pressure difference, outside air enters this sub-cavity through the gap to replenish the air supply. This action introduces cold outside air, assisting chain 213 in heat dissipation through air circulation, and also reserves space for hot air to be expelled during the next compression of piston 2137, ensuring the continuity of the heat dissipation mechanism. This maintains chain 213 operating in a stable temperature environment, further extending its service life.

[0059] When the fixed sprocket 211 is Figure 9 When the chain 213 moves counterclockwise synchronously from the perspective of the viewpoint, the working principle is the same as described above, and will not be repeated here.

[0060] In a further embodiment, to reduce the wear of impurities on the friction parts of the chain 213 from the source and thus extend the service life of the chain 213, a filter element 2138 is added in the second sealing cavity 2135. The filter element 2138 can be a plate-shaped structure and is fixedly installed with the outer chain plate 2131, with the plate surface perpendicular to the inner sidewall of the outer chain plate 2131. The installation position of the filter element 2138 is close to the end of the sealing member 21314, and its plate surface is distributed with fine filter holes to form a physical barrier.

[0061] When lubricating oil enters the second sealing chamber 2135 through the opening between piston 2137 and seal 21314, it must first flow through the filter holes of filter element 2138. The filter holes intercept solid particles, debris, and other impurities mixed in the lubricating oil, preventing these impurities from penetrating to critical friction points such as chain link hinges. If impurities enter the friction surface, they will cause abrasive wear during relative motion, exacerbating surface damage to the chain links and pins 2132. The filter element 2138 blocks this wear path at its source. Simultaneously, the filter element 2138 also prevents dust, fibers, and other impurities from the external environment from entering the second sealing chamber 2135 through the opening, maintaining the cleanliness of the chamber.

[0062] More importantly, the filter element 2138 has a self-cleaning function, the principle of which is linked to the air pressure change in the first sealing chamber 2134. When the first sealing chamber 2134 is under positive pressure, the compressed air in the chamber rushes into the second sealing chamber 2135 through the one-way valve 2136. At this time, the high-speed airflow will create a reverse impact (i.e., backflushing) on ​​the filter pores of the filter element 2138. This backflushing action can blow away the impurities trapped in the filter pores from the filter element 2138, preventing the filter pores from becoming clogged due to long-term use, and ensuring that the flow of lubricating oil is not affected.

[0063] Therefore, this integrated filtration and self-cleaning function not only ensures the stability of lubrication effect by purifying the lubricating oil, but also reduces chain 213 failures caused by untimely maintenance by avoiding wear from impurities and clogging of filter holes. This extends the service life of chain 213 while reducing equipment maintenance costs and downtime risks.

[0064] In a further embodiment, to reduce the accumulation of lubricating oil on the outside of the filter element 2138 and ensure that the lubricating oil can enter the first sealing cavity 2134 as much as possible to lubricate the components of the chain 213, the end of the piston 2137 is inserted into the second sealing cavity 2135 and moves to the limit position to form a stop engagement with the filter element 2138. This allows the piston 2137 to deliver the lubricating oil on the outside of the filter element 2138 into the first sealing cavity 2134 through the filter holes as much as possible, thereby improving the utilization rate of the lubricating oil.

[0065] In other embodiments, to improve applicability and change the relative position of the piston 2137 within the first sealing cavity 2134 and the second sealing cavity 2135, a mounting hole is machined on the outer wall of the fixed platform 21332, and a pin is inserted into the mounting hole, passing through the piston 2137. When it is necessary to change the relative position of the piston 2137 within the first sealing cavity 2134 and the second sealing cavity 2135, the pin is first removed, and then the piston 2137 can be rotated circumferentially, simultaneously causing the piston 2137 to be inserted inward or pulled outward from the first sealing cavity 2134. This changes the relative position of the piston 2137 within the first sealing cavity 2134 and the second sealing cavity 2135, thereby changing the compression degree of the sub-cavity of the first sealing cavity 2134 near the one-way valve 2136, changing the air flow rate, and ensuring heat exchange efficiency. It also changes the compression degree of the second sealing cavity 2135, changing the pressure of the lubricating oil within it, and ensuring lubrication effect.

[0066] In other embodiments, to facilitate the rotation of the fixed sprocket 211, the rocking mechanism 2 further includes at least one pair of drive components 22, which are configured to provide a driving force for the rotation of the fixed sprocket 211.

[0067] Specifically, taking the swing mechanism 2 as an example, which includes a pair of swing components 21, the number of drive components 22 is set to two, and they are symmetrically arranged on the left and right sides of the electric pool 1. Each of them includes a drive motor 221, a commutator 222, a rotating shaft 223 and two sliding bearing seats 224. Taking the drive assembly 22 located on the right as an example, two sliding bearing seats 224 are respectively set on the front and rear sides of the fixed sprocket 211. When the fixed sprocket 211 is installed, its two wheel shafts are respectively rotated and inserted into the two sliding bearing seats 224. The rotating shaft 223 extends horizontally in the front-rear direction and is coaxial with and fixedly connected to one of the wheel shafts of the fixed sprocket 211. The drive motor 221 is set on the right side wall of the electric pool 1, and the motor shaft is set vertically upward. A commutator 222 is set on the motor shaft of the drive motor 221. The commutator 222 can be composed of two meshing bevel gears, and one bevel gear is fixedly sleeved on the motor shaft of the drive motor 221, and the other bevel gear is fixedly sleeved on the rotating shaft 223, so that the fixed sprocket 211 can be driven to rotate by the drive motor 221.

[0068] In a further embodiment, to simplify the device and save energy, when there are multiple pairs of swing components 21, adjacent drive components 22 located on the same side share a single drive source.

[0069] Specifically, taking the example of two pairs of swing components 21, there are two rotating shafts 223, which are coaxial and fixedly connected to one of the axles of the two fixed sprockets 211 respectively; the commutator 222 can be composed of three bevel gears, one of which is fixedly sleeved on the motor shaft of the drive motor 221, and the other two bevel gears are fixedly sleeved on the two rotating shafts 223 respectively, so that the two fixed sprockets 211 can be driven to rotate by the drive motor 221.

[0070] In other embodiments, the one-way valve 2136 may also be configured as a spring-loaded structure.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A chain hoist device applied to electrophoretic swing of an ultra-long workpiece, characterized in that, The chain lifting device applied to electrophoresis swing of an ultra-long workpiece comprises an electrophoresis tank and a swing mechanism. The swing mechanism comprises at least one pair of swing assemblies, and the swing assemblies in the same pair are symmetrically arranged on two sides of the electrophoresis tank. Each swing assembly comprises a fixed sprocket, a lifting sprocket and a chain. The fixed sprocket is arranged on the electrophoresis tank and can rotate about its own axis. The lifting sprocket is arranged on the electrophoresis tank and can rotate about its own axis and can also be lifted in the vertical direction. One end of the chain is fixed on the electrophoresis tank, and the other end is sequentially transmitted around the lifting sprocket, the fixed sprocket and then fixed with a counterweight, which is suspended. A supporting bracket is arranged on the lifting sprocket. The supporting bracket can rotate relative to the lifting sprocket and can also move synchronously with the lifting sprocket in the vertical direction, and is configured to support the ultra-long workpiece. The chain is a pin shaft chain structure, and first and second sealing cavities are formed at the hinge joints of the chain links. A one-way valve is arranged at the boundary between the first and second sealing cavities. The opening direction of the one-way valve is from the first sealing cavity to the second sealing cavity. A piston is arranged on the inner link plate. The first end of the piston is sealingly and slidingly inserted into the first sealing cavity, and the first sealing cavity is divided into two sub-cavities that are not connected to each other. The second end of the piston can be sealingly and slidingly inserted into the second sealing cavity. The second sealing cavity has an open state and a closed state. When in the open state, the second sealing cavity is connected to the outside, and is configured to receive lubricating oil.

2. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 1, characterized in that, A filter is inserted into the second sealing cavity, and the filter is configured to filter the lubricating oil.

3. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 2, characterized in that, When the second end of the piston is inserted into the second sealing cavity and moves inward to the limit position, the filter forms a stop cooperation.

4. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 1, characterized in that, The position of the first end of the piston in the first sealing cavity can be changed.

5. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 1, characterized in that, The chain comprises a plurality of pairs of outer link plates. The pairs of outer link plates are arranged at intervals along the extension direction of the chain. The outer link plates in the same pair are opposite and arranged at intervals, and two pin shafts are interference-fitted therebetween. Two inner link plates are rotatably sleeved on the two pin shafts adjacent to each other on different outer link plates. The two inner link plates are opposite and arranged at intervals. A sleeve is rotatably sleeved on each pin shaft, and the two ends of the sleeve are simultaneously interference-fitted into the two inner link plates. A roller is rotatably sleeved on each sleeve. The first and second sealing cavities are formed at the hinge joints of the outer link plates and the inner link plates.

6. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 1, characterized in that, The counterweight has a block structure.

7. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 1, characterized in that, The one-way valve has a magnetic structure.

8. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 1, characterized in that, The one-way valve has a spring structure.

9. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 1, characterized in that, The swing mechanism further comprises at least one pair of driving assemblies, which are configured to provide driving force for the rotation of the fixed sprocket.

10. The chain hoist device for electrophoretic swinging of an ultra-long workpiece according to claim 9, characterized in that, When the number of swing assemblies is multiple pairs, the driving assemblies located on the same side and adjacent to each other share one driving source.

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