A piston rod rust prevention mechanism

Abstract

The utility model belongs to the field of piston rod rust prevention, specifically a kind of piston rod rust prevention mechanism, including piston cylinder and the piston rod slidingly connected in piston cylinder inside;The both sides of the bottom end of piston cylinder are provided with A connecting plate, and one A connecting plate bottom is provided with driving motor, and the output of the driving motor is through corresponding A connecting plate and fixedly connected threaded screw rod, and the other A connecting plate top is fixedly connected with limit rod;Through the collaborative structure design of driving motor, threaded screw rod and limit rod, the free lifting adjustment of annular oil box along the axial direction of piston rod is realized, driving motor output torque-threaded screw rod rotation-threaded hole of B connecting plate and screw rod meshing transmission, cooperate with the sliding guide of sliding hole and limit rod, solve the problem that prior art cannot be adjusted covering range according to piston rod telescopic stroke, make oil film covering range can accurately match the actual exposed length of piston rod, avoid long-stroke piston rod rust blind area.

Description

Technical Field

[0001] This utility model relates to the field of piston rod rust prevention, specifically a piston rod rust prevention mechanism. Background Technology

[0002] A piston rod is a connecting component that supports the piston in performing work. It is mainly used in moving actuators such as hydraulic cylinders and pneumatic cylinders. It has characteristics such as high strength, wear resistance, and corrosion resistance. As a shaft-type part, the piston rod is mainly responsible for transmitting power and bearing the alternating stress of reciprocating motion as the connecting component between the piston and the external mechanism. When maintaining the piston rod, it needs to be treated with rust prevention.

[0003] In the prior art, such as in the patent announcement number CN210737475U, a rust prevention mechanism for the piston rod of a hydraulic gate opener is disclosed. It includes a gate and a hydraulic cylinder that drives the gate to open or close. The hydraulic cylinder is equipped with a rust prevention mechanism to prevent the piston rod from rusting. The rust prevention mechanism includes a rack supported on the cylinder body, a gear meshing with the rack, a support guide rail supported on the rack, a lubrication ring fixedly installed below the support guide rail, and a drive motor that drives the gear to rotate. The drive motor is fixedly installed on the support guide rail, the gear is connected to the motor shaft of the drive motor, and the lubrication ring is fitted on the piston rod of the hydraulic cylinder and slides along the piston rod. While the aforementioned patent utilizes a lubricating ring and a rack and pinion transmission mechanism to drive the lubricating ring along the piston rod, allowing the annular brush inside the lubricating ring to coat the outer wall of the piston rod with an oil film to protect the piston rod and prevent premature corrosion caused by long-term exposure to salt spray, thus greatly extending the service life of the hydraulic gate hoist, the relatively long piston rod body prevents the oil film from completely covering the rod surface. Furthermore, during piston rod operation, the rod body reciprocates, and if the device cannot freely adjust the coverage distance according to the piston rod's extension and retraction stroke, it will affect the compression and reciprocating motion of the telescopic rod. Therefore, a piston rod anti-rust mechanism is proposed to address the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, where the piston rod is too long, resulting in the oil film not being able to completely cover the rod surface, and the piston rod reciprocating during operation, if the device cannot freely adjust the coverage distance according to the piston rod's extension and retraction stroke, thus affecting the compression and reciprocating motion of the telescopic rod, this utility model proposes a piston rod anti-rust mechanism.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The piston rod anti-rust mechanism of this utility model includes a piston cylinder and a piston rod slidably connected inside the piston cylinder; A connecting plates are provided on both sides of the bottom end of the piston cylinder, one of the A connecting plates is provided with a drive motor at the bottom, the output end of the drive motor passes through the corresponding A connecting plate and is fixedly connected to a threaded screw, and a limiting rod is fixedly connected to the top of the other A connecting plate; an annular oil box is sleeved on the top of the piston cylinder, and B connecting plates are fixedly connected to both sides of the bottom of the annular oil box, one of the B connecting plates has a threaded hole on its surface that is threaded to the threaded screw, and the other B connecting plate has a sliding hole that is slidably connected to the limiting rod; a through groove adapted to the diameter of the piston cylinder is provided in the middle of the annular oil box, and through holes are symmetrically provided on the inner wall of the through groove. An oil-absorbing rope is inserted into the through hole, a fixing ring is provided inside the through groove, and an oil-brushing ring adapted to the diameter of the piston rod is provided inside the fixing ring. One end of the oil-absorbing rope passes through the inside of the fixing ring and communicates with the oil-brushing ring.

[0006] Preferably, the perforations are arranged symmetrically at the four corners on the inner wall of the through groove, and the number of oil-absorbing ropes is the same as the number of perforations.

[0007] Preferably, the fixing ring is used to position the oil brushing ring and establish an oil guiding channel between the oil absorption rope and the oil brushing ring.

[0008] Preferably, the output end of the drive motor is coaxially and fixedly connected to the threaded screw, and the fixed connection is achieved by the output end passing through the connecting plate A.

[0009] Preferably, the threaded hole is only opened in one of the B connecting plates, the sliding hole is only opened in the other B connecting plate, the threaded screw and the threaded hole form a helical transmission pair, and the limiting rod and the sliding hole form a sliding pair.

[0010] Preferably, the inner diameter of the brush ring is adapted to the outer diameter of the piston rod to achieve sliding contact coating.

[0011] The advantages of this utility model are: 1. This utility model achieves free lifting and lowering adjustment of the annular oil box along the piston rod axis through the coordinated structural design of the drive motor, threaded screw and limiting rod. The torque output of the drive motor - the rotation of the threaded screw - the threaded hole of the B connecting plate meshes with the screw for transmission. With the sliding guide of the sliding hole and the limiting rod, it solves the problem that the existing technology cannot adaptively adjust the coverage range according to the extension and retraction stroke of the piston rod, so that the oil film coverage range can accurately match the actual exposed length of the piston rod and avoid the rust prevention blind spot of the long stroke piston rod. 2. This utility model achieves bidirectional dynamic coating on the piston rod surface by using a structure design that adapts the diameter of the oil brush ring to the piston rod. The inner diameter of the oil brush ring is closely attached to the outer wall of the piston rod. Combined with the lifting and lowering motion of the annular oil box and the extension and retraction motion of the piston rod itself, the oil film is actively scraped during lifting and lowering and passively replenished during piston extension and retraction. This solves the problem of low efficiency in static oiling and allows the anti-rust oil film to self-repair and strengthen with the movement of the piston rod, greatly improving the anti-rust efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the piston cylinder and piston rod structure of this utility model; Figure 3 This is a schematic diagram of the annular oil box structure of this utility model; Figure 4 This is a schematic diagram of the drive motor and screw structure of this utility model.

[0014] In the diagram: 1. Piston cylinder; 2. Piston rod; 3. A connecting plate; 4. Drive motor; 5. Threaded screw; 6. Limiting rod; 7. Annular oil box; 8. B connecting plate; 9. Fixing ring; 10. Oil brush ring; 11. Oil suction rope. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0016] Please see Figures 1-4As shown, a piston rod anti-rust mechanism includes a piston cylinder 1 and a piston rod 2 slidably connected inside the piston cylinder 1; A connecting plates 3 are provided on both sides of the bottom end of the piston cylinder 1, one of the A connecting plates 3 is provided with a drive motor 4 at its bottom, the output end of the drive motor 4 passes through the corresponding A connecting plate 3 and is fixedly connected to a threaded screw 5, and the top of the other A connecting plate 3 is fixedly connected to a limiting rod 6; an annular oil box 7 is sleeved on the top of the piston cylinder 1, and B connecting plates 8 are fixedly connected on both sides of the bottom of the annular oil box 7, one of the B connecting plates 8 has a threaded hole on its surface that is threaded to the threaded screw 5, and the other B connecting plate 8 has a sliding hole on its surface that is slidably connected to the limiting rod 6; a through groove adapted to the diameter of the piston cylinder 1 is provided in the middle of the annular oil box 7, and through holes are symmetrically provided on the inner wall of the through groove, into which an oil-absorbing rope 11 is inserted; a fixing ring 9 is provided inside the through groove, and an oil-brushing ring 10 adapted to the diameter of the piston rod 2 is provided inside the fixing ring 9, and one end of the oil-absorbing rope 11 passes through the inside of the fixing ring 9 and communicates with the oil-brushing ring 10; During operation, piston rod 2 is slidably connected inside piston cylinder 1, and A connecting plates 3 are fixed on both sides of the bottom end of piston cylinder 1. A drive motor 4 is installed at the bottom of one of the A connecting plates 3, and the output end of the drive motor 4 passes through the A connecting plate 3 and is coaxially fixed with a threaded screw 5; a limiting rod 6 is vertically fixed at the top of the other A connecting plate 3. An annular oil box 7 is sleeved on the top of piston cylinder 1, and B connecting plates 8 are fixed on both sides of its bottom. One B connecting plate 8 has a threaded hole and forms a helical engagement with the threaded screw 5, while the other B connecting plate 8 has a sliding hole and sleeves on the surface of the limiting rod 6 to achieve sliding guidance. A through groove matching the diameter of piston cylinder 1 is opened in the middle of the annular oil box 7, and through holes are symmetrically opened on the inner wall of the groove to insert oil suction ropes 11. The central groove has a built-in fixing ring 9, inside which is embedded an oil brushing ring 10 that matches the outer diameter of the piston rod 2. One end of the oil suction rope 11 passes through the fixing ring 9 and connects to the oil brushing ring 10. The drive motor 4 drives the threaded screw 5 to rotate, which drives the annular oil box 7 to rise and fall along the limiting rod 6, so that the oil brushing ring 10 covers any exposed section of the piston rod 2, solving the problem of incomplete rust prevention coverage of long stroke rods. At the same time, the oil brushing ring 10 is passively replenished with oil when the piston rod 2 extends and retracts, improving the dynamic rust prevention efficiency.

[0017] Furthermore, the perforations are arranged symmetrically at the four corners on the inner wall of the through groove, and the number of oil-absorbing ropes 11 is the same as the number of perforations. During operation, the through holes are symmetrically arranged at the four corners on the inner wall of the through groove. Four oil suction ropes 11 are inserted into the through holes accordingly. The symmetrically distributed oil suction ropes 11 at the four corners ensure that the lubricating oil is evenly guided from the annular oil box 7 to the oil brush ring 10, eliminating dead corners in oil film coating.

[0018] Furthermore, the fixing ring 9 is used to position the brushing ring 10 and establish an oil guiding channel between the oil-absorbing rope 11 and the brushing ring 10; During operation, the fixing ring 9 presses and fixes the position of the brushing ring 10. An oil guide channel is opened inside to connect the oil suction rope 11 with the oil storage chamber of the brushing ring 10. The fixing ring 9 maintains the centering of the brushing ring 10 through mechanical positioning, and at the same time establishes an oil guide channel to ensure the continuous oil supply of the oil suction rope 11 and avoid oil circuit interruption.

[0019] Furthermore, the output end of the drive motor 4 is coaxially and fixedly connected to the threaded screw 5, and the fixed connection is achieved by the output end passing through the A connecting plate 3; During operation, the output shaft of the drive motor 4 passes vertically through the connecting plate A 3 and is rigidly connected to the end of the threaded screw 5 through a coupling. The coaxial fixed connection eliminates transmission eccentricity, ensuring that the threaded screw 5 rotates smoothly and there is no jamming during the lifting process.

[0020] Furthermore, the threaded hole is only opened on one of the B connecting plates 8, the sliding hole is only opened on the other B connecting plate 8, the threaded screw 5 and the threaded hole form a helical transmission pair, and the limiting rod 6 and the sliding hole form a sliding pair; During operation, the two B connecting plates 8 have a clear division of labor: only one side of the B connecting plate 8 has a threaded hole to engage the threaded screw 5, and the other side of the B connecting plate 8 has a sliding hole to connect the limiting rod 6. The division of labor between the threaded hole and the sliding hole constitutes a composite guiding mechanism of the helical transmission pair and the sliding pair, which suppresses the swaying of the annular oil box 7 when it is raised and lowered, and keeps the oil brush ring 10 and the piston rod 2 axially aligned.

[0021] Furthermore, the inner diameter of the brush ring 10 is adapted to the outer diameter of the piston rod 2 to achieve sliding contact coating; During operation, the inner wall of the oil brush ring 10 and the outer wall of the piston rod 2 maintain a clearance fit. The contact surface is pre-filled with an oil storage fiber layer. The oil brush ring 10 with a suitable diameter achieves sliding scraping under the micro-gap. The oil storage fiber layer absorbs lubricating oil to form a uniform oil film, reducing friction loss.

[0022] Working principle: After the drive motor 4 starts, it drives the threaded screw 5 to rotate. Through the meshing transmission between the threaded hole and the threaded screw 5 and the sliding guide along the limit rod 6, the annular oil box 7 is driven to move up and down along the piston rod 2 axially. The lubricating oil in the annular oil box 7 is continuously transported to the brushing ring 10 through the oil guide channel of the fixed ring 9 via the oil suction ropes 11 distributed symmetrically at the four corners. During the lifting process, the brushing ring 10 actively scrapes the oil film by using the matching inner diameter with the piston rod 2. At the same time, when the piston rod 2 moves back and forth, the brushing ring 10 is passively replenished with oil, so as to achieve dynamic anti-rust coverage throughout the stroke.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A piston rod anti-rust mechanism, characterized in that: It includes a piston cylinder (1) and a piston rod (2) slidably connected inside the piston cylinder (1); A connecting plates (3) are provided on both sides of the bottom end of the piston cylinder (1), and a drive motor (4) is provided at the bottom of one of the A connecting plates (3). The output end of the drive motor (4) passes through the corresponding A connecting plate (3) and is fixedly connected to a threaded screw (5). A limiting rod (6) is fixedly connected to the top of the other A connecting plate (3). The piston cylinder (1) is fitted with an annular oil box (7) at the top. The bottom sides of the annular oil box (7) are fixedly connected to B connecting plates (8). One of the B connecting plates (8) has a threaded hole on its surface that is threaded to the threaded screw (5), and the other B connecting plate (8) has a sliding hole on its surface that is slidably engaged with the limiting rod (6). The annular oil box (7) has a central groove in the middle that is adapted to the diameter of the piston cylinder (1). The inner wall of the central groove has symmetrical through holes. An oil-absorbing rope (11) is inserted into the through holes. A fixing ring (9) is set inside the central groove. An oil-brushing ring (10) adapted to the diameter of the piston rod (2) is set inside the fixing ring (9). One end of the oil-absorbing rope (11) passes through the inside of the fixing ring (9) and communicates with the oil-brushing ring (10).

2. The piston rod anti-rust mechanism according to claim 1, characterized in that: The perforations are arranged symmetrically at the four corners on the inner wall of the through groove, and the number of oil-absorbing ropes (11) is the same as the number of perforations.

3. The piston rod anti-rust mechanism according to claim 1, characterized in that: The fixing ring (9) is used to position the oil brushing ring (10) and establish an oil guiding channel between the oil absorption rope (11) and the oil brushing ring (10).

4. The piston rod anti-rust mechanism according to claim 1, characterized in that: The output end of the drive motor (4) is coaxially and fixedly connected to the threaded screw (5), and the output end passes through the A connecting plate (3) to achieve this fixed connection.

5. The piston rod anti-rust mechanism according to claim 1, characterized in that: The threaded hole is only opened on one of the B connecting plates (8), the sliding hole is only opened on the other B connecting plate (8), the threaded screw (5) and the threaded hole form a helical transmission pair, and the limiting rod (6) and the sliding hole form a sliding pair.

6. The piston rod anti-rust mechanism according to claim 1, characterized in that: The inner diameter of the brush ring (10) is adapted to the outer diameter of the piston rod (2) to achieve sliding contact coating.

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