Full-automatic constant pressure lubricating device for chain structure

Abstract

The application relates to the field of constant-pressure lubrication, in particular to a full-automatic constant-pressure lubricating device for a chain structure, which comprises a frame, a driving sprocket and a driven sprocket rotatably arranged on the frame, and a chain arranged outside the driving sprocket and the driven sprocket; a lubricating mechanism for lubricating the connection between the chain and the driven sprocket is arranged on the frame; an oil supply pipe for supplying oil to the lubricating mechanism is also arranged on the frame; the driving sprocket drives the rotating shaft to rotate after rotating, so that the plugging assembly rotates; when the plugging assembly rotates to the baffle, the baffle extrudes the plugging assembly, so that the oil outlet connected with the oil supply channel is opened, the oil outlet can discharge the lubricating oil, the lubricating oil enters the connection between the driven sprocket and the chain, and the purpose of automatically lubricating the connection between the driven sprocket and the chain when the driven sprocket rotates is achieved.

Description

Technical Field

[0001] This invention relates to the field of constant pressure lubrication technology, and more specifically to a fully automatic constant pressure lubrication device for a chain structure. Background Technology

[0002] In modern industry, chain structures are widely used in various mechanical equipment as an important component of transmission and conveying devices. The chain and sprocket, as the core components of the chain structure, directly affect the performance and lifespan of the entire device. However, during long-term operation, friction between the chain and sprocket, as well as between the chain links, leads to wear and heat accumulation. This not only reduces the transmission efficiency of the equipment but may also cause malfunctions or even equipment downtime. Therefore, regular and effective lubrication of chain structures is particularly important.

[0003] Traditional chain lubrication methods often rely on manual application or dripping of grease, which has several drawbacks. First, manual application of grease is not only inefficient but also struggles to ensure even and timely lubrication, especially in high-speed chain structures where manual application is virtually impossible. Second, while dripping lubrication provides continuous lubrication, it's difficult to precisely control the amount and location of the lubricant, often leading to waste and environmental pollution. Furthermore, traditional lubrication methods cannot target the contact points between the chain and sprockets, or between chain links—areas prone to the most friction and wear.

[0004] To address the aforementioned issues, a fully automatic constant-pressure lubrication device for chain structures has been developed, achieving precise lubrication of the contact points between the chain and sprockets, as well as the contact points between the chain links. This device employs a constant-pressure oil supply system, ensuring a continuous and stable supply of lubricating oil to the lubrication points during chain operation, thereby effectively reducing friction and wear and extending the service life of the chain and sprockets. Summary of the Invention

[0005] To address the aforementioned problems, embodiments of the present invention provide a fully automatic constant pressure lubrication device for chain structures, thereby achieving the objective of resolving the problems raised in the background art.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a fully automatic constant pressure lubrication device for a chain structure, comprising a frame, on which a driving sprocket and a driven sprocket are rotatably mounted, and a chain is disposed outside the driving sprocket and the driven sprocket; a lubrication mechanism for lubricating the connection between the chain and the driven sprocket is disposed on the frame; and an oil supply pipe for supplying oil to the lubrication mechanism is also disposed on the frame. The lubrication mechanism includes a rotating shaft rotatably disposed inside the frame, an oil delivery channel opened inside the rotating shaft, an oil outlet opened inside the driven sprocket and connected to the oil delivery channel, a sealing component disposed inside the rotating shaft for controlling the opening and closing of the oil delivery channel, and a baffle disposed on the frame for squeezing the sealing component to move; the driven sprocket is fixedly connected to the rotating shaft. When the driven sprocket drives the shaft to rotate, the opening and closing of the oil delivery channel is controlled by the pressure of the baffle on the sealing component.

[0007] As a further improvement to the above technical solution: The side of the baffle closest to the sealing component is a gradually curved surface. When the sealing component moves to the middle position of the baffle, the sealing component will fully open the oil delivery channel.

[0008] The sealing assembly includes a groove formed inside the rotating shaft and connected to the oil delivery channel, a block slidably disposed inside the groove, a through groove formed inside the block for connecting the oil delivery channel, and a spring disposed on one side of the block; a pulley is rotatably connected to the side of the block that contacts the baffle.

[0009] A sealing ring is provided at the end of the oil delivery channel that connects to the chute; a first conical surface is provided on the block, and a second conical surface is provided inside the chute to cooperate with the first conical surface for sealing.

[0010] The baffle is mounted on the frame via an adjustment assembly; when the shaft stops rotating, the adjustment assembly separates the baffle from the sealing assembly.

[0011] The adjustment assembly includes a guide rail fixedly connected to the frame, a connecting rod rotatably disposed inside the guide rail, a gear one fixedly connected to the end of the connecting rod, a gear two fixedly connected to the rotating shaft and meshing with the gear one, a collar one sleeved outside the connecting rod, a collar two rotatably disposed outside the collar one, a slider slidably disposed inside the guide rail and rotatably disposed outside the collar two, a pawl structure disposed inside the collar one and the collar two, and a resistance structure disposed inside the collar two and the slider. The surface of the connecting rod is provided with a guide groove, and a guide block that works in conjunction with the guide groove is fixedly connected inside the collar.

[0012] The pawl structure includes a ratchet fixedly connected to the inner side of the second collar and a pawl disposed on the outer side of the first collar.

[0013] The resistance structure includes a gear three fixedly connected to the outside of the collar two, and multiple gears four rotatably disposed inside the slider and meshing with the gear three.

[0014] The resistance structure includes a resistance wheel fixedly connected to the outside of the second collar, a wave groove opened on the outside of the resistance wheel, and a movable pin elastically sliding inside the slider via the second spring.

[0015] The oil outlet is located at the tooth groove of the driven sprocket, specifically: the oil outlet is located on both sides of the contact position between the tooth groove of the driven sprocket and the chain.

[0016] The beneficial effects of the embodiments of the present invention are as follows: In actual use, the driven sprocket rotates and drives the shaft to rotate, causing the sealing component to rotate. When the sealing component rotates to the baffle, the baffle squeezes the sealing component, thereby opening the oil supply channel corresponding to the sealing component. This allows the oil outlet connected to the oil supply channel to discharge lubricating oil, which then enters the connection between the driven sprocket and the chain. This achieves the purpose of automatically lubricating the connection between the driven sprocket and the chain when the driven sprocket rotates. In actual use, the baffle can simultaneously squeeze multiple sealing components, allowing multiple oil outlets to discharge lubricating oil. The length of the baffle can be changed to control which oil outlets need to discharge oil, ensuring that only the oil outlets in contact with the chain discharge oil, thus guaranteeing the lubrication effect between the driven sprocket and the chain; while the oil outlets not in contact with the chain will not discharge oil, preventing lubricating oil from dripping and causing contamination after oil is discharged from the oil outlets not in contact with the chain. In actual use, when the driven sprocket stops rotating, the shaft stops rotating. At this time, the baffle separates from the sealing component under the action of the adjusting component, so that the oil delivery channel is completely closed, and the continuous oil output caused by the baffle continuously squeezing the sealing component will prevent the lubricating oil from dripping. The oil outlets are located on both sides of the contact point between the driven sprocket teeth and the chain, avoiding the contact point between the chain and the driven sprocket. This makes the contact area between the driven sprocket and the chain smoother, preventing uneven contact caused by the oil outlets from accelerating wear. At the same time, the oil outlets being located on both sides of the contact point between the driven sprocket teeth and the chain allows the lubricating oil discharged from the outlets to better enter between the chain links, i.e., to provide targeted lubrication and improve the lubrication effect. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram from a first perspective of the present invention; Figure 2 This is a structural schematic diagram from a second perspective of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a cross-sectional schematic diagram of the lubrication mechanism of the present invention; Figure 5 This is a cross-sectional view of the rotating shaft of the present invention; Figure 6 for Figure 5 Enlarged structural diagram at point A; Figure 7This is a schematic diagram of the structure of the adjustment component of the present invention; Figure 8 This is a schematic diagram of the structure of the guide rail of the present invention; Figure 9 This is a schematic diagram of the structure of the slider in this invention; Figure 10 This is a schematic diagram of the structure of the resistance structure of the present invention in one embodiment; Figure 11 This is a schematic diagram of the structure of the resistance structure in Embodiment 2 of the present invention; Figure 12 This is a cross-sectional schematic diagram from a first perspective of the driven sprocket of the present invention; Figure 13 This is a cross-sectional schematic diagram from a second perspective of the driven sprocket of the present invention; Figure 14 This is a schematic diagram of the driven sprocket of the present invention.

[0018] In the diagram: 1. Frame; 2. Drive sprocket; 3. Driven sprocket; 4. Chain; 5. Lubrication mechanism; 6. Oil supply pipe; 7. Adjustment assembly; 8. Guide groove; 9. Guide block; 51. Shaft; 52. Oil delivery channel; 53. Oil outlet; 54. Sealing assembly; 55. Baffle; 541. Slide groove; 542. Block; 543. Through groove; 544. Spring 1; 545. Pulley; 546. Sealing ring; 547. Conical surface 1; 548. Conical surface 2; 71. Guide rail; 72. Connecting rod; 73. Gear 1; 74. Gear 2; 75. Collar 1; 76. Collar 2; 77. Slider; 78. Pawl structure; 79. Resistance structure; 781. Ratchet; 782. Pad; 791. Gear Three; 792. Gear Four; 793. Resistance Wheel; 794. Wave Groove; 795. Spring Two; 796. Movable Pin. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0020] See Figures 1 to 14This invention discloses a fully automatic constant pressure lubrication device for a chain structure, comprising a frame 1, on which a driving sprocket 2 and a driven sprocket 3 are rotatably mounted, and a chain 4 is disposed outside the driving sprocket 2 and the driven sprocket 3; a lubrication mechanism 5 is disposed on the frame 1 for lubricating the connection between the chain 4 and the driven sprocket 3; an oil supply pipe 6 is also disposed on the frame 1 for supplying oil to the lubrication mechanism 5; an oil pump is externally connected to the oil supply pipe 6, and the oil pump pumps lubricating oil into the lubrication mechanism 5; A motor is installed on the frame 1 to drive the drive sprocket 2 to rotate. After the motor starts, it drives the drive sprocket 2 to rotate, which in turn drives the driven sprocket 3 to rotate through the chain 4. As the driven sprocket 3 rotates, the lubrication mechanism 5 introduces lubricating oil into the connection between the chain 4 and the driven sprocket 3. The lubrication mechanism 5 includes a rotating shaft 51 rotatably disposed inside the frame 1, an oil delivery channel 52 opened inside the rotating shaft 51, an oil outlet 53 opened inside the driven sprocket 3 and connected to the oil delivery channel 52, a sealing component 54 disposed inside the rotating shaft 51 for controlling the opening and closing of the oil delivery channel 52, and a baffle 55 disposed on the frame 1 for squeezing and moving the sealing component 54; the driven sprocket 3 is fixedly connected to the rotating shaft 51; and an oil supply pipe 6 is rotatably connected to one end of the rotating shaft 51, so that the oil supply pipe 6 and the oil delivery channel 52 are connected. Multiple oil delivery channels 52 are provided, and multiple oil outlets 53 are connected to the oil delivery channels 52 respectively. Multiple sealing components 54 control the opening and closing of multiple oil delivery channels 52 respectively. When the baffle 55 squeezes the sealing component 54, the sealing component 54 moves, thereby opening the oil delivery channel 52 corresponding to the sealing component 54. When the driven sprocket 3 drives the rotating shaft 51 to rotate, the oil delivery channel 52 is opened and closed by the pressure of the sealing component 54 by the baffle 55. In actual use, the driven sprocket 3 rotates and drives the shaft 51 to rotate, causing the sealing component 54 to rotate. When the sealing component 54 rotates to the baffle 55, the baffle 55 squeezes the sealing component 54, thereby opening the oil supply channel 52 corresponding to the sealing component 54. This allows the oil outlet 53 connected to the oil supply channel 52 to discharge lubricating oil, which then enters the connection between the driven sprocket 3 and the chain 4. This achieves the purpose of automatically lubricating the connection between the driven sprocket 3 and the chain 4 when the driven sprocket 3 rotates. In actual use, the baffle 55 can simultaneously squeeze multiple sealing components 54, so that multiple oil outlets 53 can discharge lubricating oil. The length of the baffle 55 can be changed to control which oil outlets 53 need to discharge oil. Only the oil outlets 53 in contact with the chain 4 can discharge oil, ensuring the lubrication effect between the driven sprocket 3 and the chain 4. The oil outlets 53 that are not in contact with the chain 4 will not discharge oil, so as to avoid the lubricating oil dripping and causing pollution after the oil outlets 53 that are not in contact with the chain 4 discharge oil.

[0021] As a further explanation of this application: The side of the baffle 55 closest to the sealing component 54 is a gradually curved surface. When the sealing component 54 moves to the middle position of the baffle 55, the sealing component 54 will fully open the oil delivery channel 52. In actual use, the sealing component 54 rotates with the rotation of the shaft 51, causing relative movement between the sealing component 54 and the baffle 55. Specifically, as the sealing component 54 rotates, it enters the baffle 55 from one end, and the baffle 55 compresses the sealing component 54. At this time, the sealing component 54 slightly opens the corresponding oil delivery channel 52, allowing a small amount of lubricating oil to be discharged from the oil outlet 53. As the sealing component 54 continues to rotate, the degree of compression by the baffle 55 on the sealing component 54 increases, which gradually increases the opening degree of the oil delivery channel 52, and thus gradually increases the oil output from the oil outlet 53. As the sealing assembly 54 continues to rotate, when the sealing assembly 54 rotates to the middle position of the baffle 55, the sealing assembly 54 is compressed to the limit position by the baffle 55, that is, the oil delivery channel 52 is fully opened, and the oil output of the oil outlet 53 reaches the maximum. As the sealing assembly 54 continues to rotate, the pressure exerted by the baffle 55 on the sealing assembly 54 gradually decreases, thereby gradually reducing the opening degree of the oil delivery channel 52, i.e., the oil output from the oil outlet 53 gradually decreases; when the sealing assembly 54 separates from the other end of the baffle 55, the oil delivery channel 52 closes. The oil output of the oil outlet 53 is adjusted by the baffle 55, so that when a link of the chain 4 first contacts the driven sprocket 3, the oil outlet 53 outputs a small amount of oil. As the link of the chain 4 moves on the driven sprocket 3, the oil output of the oil outlet 53 gradually increases. When the link of the chain 4 moves to the middle position of the driven sprocket 3, the oil output of the oil outlet 53 reaches its maximum. The purpose is to prevent the oil output of the oil outlet 53 from being small when the link of the chain 4 first contacts the driven sprocket 3, so as to prevent the lubricating oil from dripping and causing contamination due to excessive oil output. When the link of the chain 4 moves to the middle position of the driven sprocket 3, the oil output reaches its maximum. Even if the lubricating oil drips from this position, the dripping lubricating oil will move along the chain 4 to prevent the dripping lubricating oil from causing contamination.

[0022] As a further explanation of this application: The sealing assembly 54 includes a groove 541 opened inside the rotating shaft 51 and connected to the oil delivery channel 52, a block 542 slidably disposed inside the groove 541, a through groove 543 opened inside the block 542 for connecting the oil delivery channel 52, and a spring 544 disposed on one side of the block 542. When the block 542 contacts the baffle 55, the baffle 55 squeezes the block 542, thereby pressing the block 542 into the interior of the chute 541, so that the through groove 543 connects to the oil delivery channel 52, and the oil delivery channel 52 can then perform oil delivery operations; as the block 542 is gradually pressed into the chute 541, the overlapping area of ​​the through groove 543 and the oil delivery channel 52 gradually increases, thus the oil delivery volume of the oil delivery channel 52 gradually increases; A pulley 545 is rotatably connected to the side of the block 542 that contacts the baffle 55, so that the block 542 contacts the baffle 55 through the pulley 545, thereby reducing the frictional force of the block 542 on the baffle 55. The gradual curvature of the baffle 55 allows the block 542 to slowly extend from the groove 541. When the block 542 separates from the baffle 55, it is just fully extended from the groove 541, which allows the spring 544 to be slowly compressed and released. This avoids the block 542 from violently colliding inside the groove 541 due to the rapid release of the spring force of the spring 544, which would affect the service life of the sealing component 54.

[0023] As a further explanation of this application: A sealing ring 546 is provided at the end of the oil delivery channel 52 that connects to the slide groove 541; a cone surface 547 is provided on the block 542, and a cone surface 548 is provided inside the slide groove 541 to cooperate with the cone surface 547 for sealing. The sealing performance is improved by using sealing ring 546, and the sealing performance is further improved by forming a conical seal using conical surface 547 and conical surface 548.

[0024] As a further explanation of this application: The baffle 55 is set on the frame 1 by the adjusting component 7; when the rotating shaft 51 stops rotating, the adjusting component 7 separates the baffle 55 from the sealing component 54; in actual use, when the driven sprocket 3 stops rotating, the rotating shaft 51 stops rotating. At this time, the baffle 55 separates from the sealing component 54 under the action of the adjusting component 7, so that the oil delivery channel 52 is completely closed, and the continuous oil output caused by the baffle 55 continuously squeezing the sealing component 54 is prevented from causing the lubricating oil to drip.

[0025] As a further explanation of this application: The adjustment assembly 7 includes a guide rail 71 fixedly connected to the frame 1, a connecting rod 72 rotatably disposed inside the guide rail 71, a gear 73 fixedly connected to the end of the connecting rod 72, a gear 74 fixedly connected to the rotating shaft 51 and meshing with the gear 73, a collar 75 sleeved outside the connecting rod 72, a collar 76 rotatably disposed outside the collar 75, a slider 77 slidably disposed inside the guide rail 71 and rotatably disposed outside the collar 76, a pawl structure 78 disposed inside the collar 75 and the collar 76, and a resistance structure 79 disposed inside the collar 76 and the slider 77; the slider 77 is fixedly connected to the baffle 55. The surface of the connecting rod 72 is provided with a guide groove 8, and the inside of the collar 75 is fixedly connected with a guide block 9 that cooperates with the guide groove 8; When the rotating shaft 51 rotates, it drives the gear 73 to rotate through the gear 2 74, thereby causing the connecting rod 72 to rotate. After the connecting rod 72 rotates, it drives the slider 77 to slide to the end of the connecting rod 72 close to the sealing component 54 through the cooperation of the guide groove 8 and the guide block 9, so that the baffle 55 and the sealing component 54 can come into contact. When the rotating shaft 51 stops rotating, the sealing component 54 pushes the baffle 55 to move, so that the baffle 55 can no longer squeeze the sealing component 54, thus achieving the purpose of stopping the lubrication oil discharge work simultaneously when the driven sprocket 3 stops rotating. In actual use, the driven sprocket 3 rotates, driving the shaft 51 to rotate, which in turn drives the gear 74 to rotate. This, in turn, drives the connecting rod 72 to rotate via the gear 73. When the connecting rod 72 rotates, it pushes the collar 75 to move through the cooperation of the guide groove 8 and the guide block 9. At this time, the collar 75 and the collar 76 are prevented from rotating relative to each other through the cooperation of the pawl structure 78. This allows the collar 76 to move. At this time, due to the influence of the resistance structure 79, the collar 76 and the slider 77 do not rotate relative to each other. Finally, the slider 77 is moved to the end of the connecting rod 72 that is close to the sealing component 54. When the slider 77 moves to one end of the connecting rod 72, the connecting rod 72 continues to rotate. Through the cooperation of the guide groove 8 and the guide block 9, the connecting rod 72 provides rotational force to the first collar 75. When the rotational force is greater than the resistance of the resistance structure 79, relative rotation occurs between the second collar 76 and the slider 77. At this time, the slider 77 can be stabilized to one end of the connecting rod 72 near the sealing component 54, so that the baffle 55 and the sealing component 54 come into contact. When the driven sprocket 3 stops rotating, the connecting rod 72 also stops rotating. At this time, the connecting rod 72 cannot provide rotational force to the collar 75 through the cooperation of the guide groove 8 and the guide block 9. Affected by the squeezing force between the sealing component 54 and the baffle 55, the collar 75 and the collar 76 can rotate in opposite directions, which can make the slider 77 slide. At this time, the baffle 55 and the sealing component 54 separate. That is, when the driven sprocket 3 stops rotating, the baffle 55 and the sealing component 54 separate synchronously, so that the lubrication oil output stops synchronously.

[0026] As a further explanation of this application: The pawl structure 78 includes a ratchet 781 fixedly connected to the inner side of the second collar 76 and a pawl 782 disposed on the outer side of the first collar 75. Through the cooperation of the ratchet 781 and the pawl 782, the first collar 75 and the second collar 76 can only rotate relative to each other in one direction.

[0027] As an example of the resistance structure in this application: The resistance structure 79 includes a gear 3 791 fixedly connected to the outside of the collar 2 76 and multiple gears 4 792 rotatably disposed inside the slider 77 and meshing with the gear 3 791. When the collar 2 76 rotates, it needs to overcome the rotational resistance when the gear 3 791 drives the gears 4 792 to rotate. That is, the rotational resistance between the gear 3 791 and the gears 4 792 provides resistance to the rotation of the collar 2 76 and the slider 77.

[0028] As a second embodiment of the resistance structure of this application: The resistance structure 79 includes a resistance wheel 793 fixedly connected to the outside of the second collar 76, a wave groove 794 opened on the outside of the resistance wheel 793, and a movable pin 796 elastically slidably disposed inside the slider 77 via a second spring 795. When the second collar 76 rotates, it drives the resistance wheel 793 to rotate, thereby squeezing the movable pin 796 through the wave groove 794, so that the second spring 795 is compressed. That is, when the second collar 76 rotates, it needs to overcome the friction between the resistance wheel 793 and the movable pin 796, and at the same time, it also needs to overcome the elastic force of the second spring 795.

[0029] As a further explanation of this application: The oil outlet 53 is located at the tooth groove of the driven sprocket 3, specifically: the oil outlet 53 is located on both sides of the contact position between the tooth groove of the driven sprocket 3 and the chain 4 (e.g., Figure 14 As shown), this avoids the contact point between the chain 4 and the driven sprocket 3, making the contact area between the driven sprocket 3 and the chain 4 smoother. This prevents accelerated wear caused by an uneven contact point due to the oil outlet 53. Simultaneously, the oil outlet 53 is located on both sides of the contact point between the driven sprocket 3 tooth groove and the chain 4, allowing the lubricating oil discharged from the oil outlet 53 to better enter the spaces between the chain links in the chain 4 (e.g., ...). Figure 13As shown in the figure, targeted lubrication is performed to improve the lubrication effect.

[0030] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Furthermore, it should be noted that, in the description of this invention, 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 according to the specific circumstances.

[0032] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0033] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A fully automatic constant pressure lubrication device for a chain structure, characterized in that, The device includes a frame on which a drive sprocket and a driven sprocket are rotatably mounted. A chain is mounted on the outside of the drive sprocket and the driven sprocket. The frame is provided with a lubrication mechanism for lubricating the connection between the chain and the driven sprocket. The frame is also provided with an oil supply pipe for supplying oil to the lubrication mechanism. The lubrication mechanism includes a rotating shaft rotatably disposed inside the frame, an oil delivery channel opened inside the rotating shaft, an oil outlet opened inside the driven sprocket and connected to the oil delivery channel, a sealing component disposed inside the rotating shaft for controlling the opening and closing of the oil delivery channel, and a baffle disposed on the frame for squeezing the sealing component to move. The driven sprocket is fixedly connected to the rotating shaft. When the driven sprocket drives the shaft to rotate, the opening and closing of the oil delivery channel is controlled by the pressure of the baffle on the sealing component; The sealing assembly includes a groove formed inside the rotating shaft and connected to the oil delivery channel, a block slidably disposed inside the groove, a through groove formed inside the block for connecting the oil delivery channel, and a spring disposed on one side of the block. A pulley is rotatably connected to the side of the block that contacts the baffle. The baffle is mounted on the frame via an adjustment assembly. When the rotating shaft stops rotating, the adjustment assembly separates the baffle from the sealing assembly. The adjustment assembly includes a guide rail fixedly connected to the frame, a connecting rod rotatably disposed inside the guide rail, a gear one fixedly connected to the end of the connecting rod, a gear two fixedly connected to the rotating shaft and meshing with the gear one, a collar one sleeved outside the connecting rod, a collar two rotatably disposed outside the collar one, a slider slidably disposed inside the guide rail and rotatably disposed outside the collar two, a pawl structure disposed inside the collar one and the collar two, and a resistance structure disposed inside the collar two and the slider. The surface of the connecting rod is provided with a guide groove, and a guide block that works in conjunction with the guide groove is fixedly connected inside the collar.

2. The fully automatic constant pressure lubrication device for chain structures according to claim 1, characterized in that, The side of the baffle closest to the sealing component is a gradually curved surface. When the sealing component moves to the middle position of the baffle, the sealing component will fully open the oil delivery channel.

3. The fully automatic constant pressure lubrication device for chain structures according to claim 1, characterized in that, A sealing ring is provided at the end of the oil delivery channel that connects to the chute; a first conical surface is provided on the block, and a second conical surface is provided inside the chute to cooperate with the first conical surface for sealing.

4. The fully automatic constant pressure lubrication device for chain structures according to claim 1, characterized in that, The pawl structure includes a ratchet fixedly connected to the inner side of the second collar and a pawl disposed on the outer side of the first collar.

5. The fully automatic constant pressure lubrication device for chain structures according to claim 1, characterized in that, The resistance structure includes a gear three fixedly connected to the outside of the collar two, and multiple gears four rotatably disposed inside the slider and meshing with the gear three.

6. The fully automatic constant pressure lubrication device for chain structures according to claim 1, characterized in that, The resistance structure includes a resistance wheel fixedly connected to the outside of the second collar, a wave groove opened on the outside of the resistance wheel, and a movable pin elastically sliding inside the slider via the second spring.

7. The fully automatic constant pressure lubrication device for chain structures according to claim 1, characterized in that, The oil outlet is located at the tooth groove of the driven sprocket, specifically: the oil outlet is located on both sides of the contact position between the tooth groove of the driven sprocket and the chain.

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