Jack self-lubricating structure
By installing an oil tank and a retainer inside the jack, the friction between the piston rod and the inner wall of the cylinder is reduced by using a lubricating oil film, thus solving the jack wear problem and extending its service life.
Patent Information
- Application Number
- CN202520612174.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-02
AI Technical Summary
The sliding friction between the jack piston rod and the inner wall of the cylinder leads to increased wear and affects its service life.
An oil tank and a mounting bracket are installed inside the jack body. The lubricating oil in the oil tank forms a lubricating oil film, reducing the friction between the piston rod and the inner wall of the cylinder. A guide rod and sealing sleeve structure are used to prevent the lubricating oil from flowing out.
It effectively reduces wear between the piston rod and the inner wall of the cylinder, extending the service life of the jack.
Smart Images
Figure CN223936134U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of jack technology, specifically to a self-lubricating structure for a jack. Background Technology
[0002] A jack, also known as a lifting device, is a small, lightweight lifting device that uses a rigid lifting component as its working device to lift heavy objects within its stroke via a top support or bottom claw. During the vertical movement of the jack's piston rod within the cylinder cavity, friction occurs between the piston rod and the inner wall of the cylinder. Because this friction is sliding friction, it can easily lead to accelerated wear and leakage problems during long-term use, thus affecting the lifting and lowering of the piston rod and impacting the overall service life. Utility Model Content
[0003] To address the problems in the existing technology, this utility model provides a self-lubricating structure for a jack.
[0004] The technical solution adopted by this utility model to solve its technical problem is a self-lubricating jack structure, including a jack body, a piston rod inside the jack body, a retainer and an oil tank on both sides of the piston rod, a locking bolt on both sides of the jack body, two first threaded holes adapted to the locking bolts on each of the two retainers, external threads at the bottom of each of the two oil tanks, second threaded holes adapted to the external threads at the bottom of each of the two retainers, a protective cap threaded to the top of each of the two oil tanks, an oil storage chamber inside each of the two retainers, the second threaded holes communicating with the oil storage chamber, multiple oil outlet holes on the side wall of each retainer near the piston rod, and an oil drain hole at the bottom of each of the two oil tanks.
[0005] By adopting the above technical solution, the protective cover is unscrewed, a certain amount of lubricating oil is added to the oil drum, the protective cover is tightened, and the oil drum is installed on the mounting bracket. When the jack body is in use, the lubricating oil enters the oil storage chamber through the oil drain hole, and the lubricating oil in the oil storage chamber is discharged to the piston rod through the oil outlet hole, forming a lubricating oil film on the outer circumference of the piston rod. This reduces the wear caused by friction between the piston rod and the inner wall of the cylinder when the piston rod is raised and lowered, thereby extending the overall service life and facilitating long-term use.
[0006] Specifically, each of the two oil drums is equipped with a guide rod, each of the two guide rods is fixed with a conical sealing sleeve, each of the two guide rods has a vertical rod fixed to its top, each of the two vertical rods is fitted with a spring, each of the two oil drums has a stop block fixed inside, and each of the two stop blocks has a through hole that matches the vertical rod.
[0007] By adopting the above technical solution, before the oil drum is removed from the mounting bracket, the bottom end of the guide rod abuts against the inner wall of the mounting bracket, and the oil drain hole at the bottom of the oil drum is not blocked by the sealing sleeve. The lubricating oil in the oil drum can flow out smoothly. When it is necessary to remove the oil drum for refueling, the oil drum can be removed from the mounting bracket by rotating the oil drum. At this time, the bottom end of the guide rod no longer abuts against the inner wall of the mounting bracket, the spring pushes the guide rod down, and the sealing sleeve blocks the oil drain hole at the bottom of the oil drum to prevent lubricating oil from flowing out through the oil drain hole when refueling the oil drum or during the transfer of the oil drum. After injecting lubricating oil into the oil drum, the oil drum is installed on the mounting bracket, the bottom end of the guide rod abuts against the inner wall of the mounting bracket, the sealing sleeve moves up, and the blockage of the oil drain hole is released.
[0008] Specifically, both of the card holders are fitted with protective pads.
[0009] By adopting the above technical solution, the protective pad can protect the jack body.
[0010] Specifically, both oil drums have observation ports on their side walls, and both observation ports are fitted with glass.
[0011] By adopting the above technical solution, the remaining amount of lubricating oil in the oil drum can be easily observed through the observation port and glass.
[0012] Specifically, a first sealing ring is fixed to the bottom of each of the two oil drums, and a second sealing ring is fixed to the bottom of each of the two protective covers.
[0013] By adopting the above technical solution, the setting of the first sealing ring improves the sealing performance between the oil drum and the card holder, and the setting of the second sealing ring improves the sealing performance between the protective cover and the oil drum.
[0014] Specifically, the outer walls of both oil drums are integrally formed with multiple anti-slip protrusions, and the outer walls of both protective covers are provided with multiple anti-slip grooves.
[0015] By adopting the above technical solution, the anti-slip protrusions facilitate the gripping and disassembly of the oil drum, and the anti-slip texture facilitates the screwing on of the protective cap.
[0016] The beneficial effects of this utility model are:
[0017] (1) The self-lubricating structure of the jack described in this utility model is as follows: unscrew the protective cover, add a certain amount of lubricating oil to the oil drum, tighten the protective cover, install the oil drum on the mounting base, and when the jack body is in use, the lubricating oil enters the oil storage chamber through the oil drain hole, and the lubricating oil in the oil storage chamber is discharged to the piston rod through the oil outlet hole, forming a lubricating oil film on the outer circumference of the piston rod, so as to reduce the wear caused by friction between the piston rod and the inner wall of the cylinder when the piston rod is raised and lowered, thereby extending the overall service life and being beneficial for long-term use.
[0018] (2) The self-lubricating structure of the jack described in this utility model, before the oil drum is removed from the mounting base, the bottom end of the guide rod abuts against the inner wall of the mounting base, and the oil drain hole at the bottom of the oil drum is not blocked by the sealing sleeve, so the lubricating oil in the oil drum can flow out smoothly. When the oil drum needs to be removed for refueling, the oil drum can be removed from the mounting base by rotating the oil drum. At this time, the bottom end of the guide rod no longer abuts against the inner wall of the mounting base, the spring pushes the guide rod down, and the sealing sleeve blocks the oil drain hole at the bottom of the oil drum to prevent the lubricating oil from flowing out through the oil drain hole when refueling the oil drum or during the transfer of the oil drum. After injecting lubricating oil into the oil drum, the oil drum is installed on the mounting base, the bottom end of the guide rod abuts against the inner wall of the mounting base, the sealing sleeve moves up, and the blockage of the oil drain hole is released. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the card holder structure of this utility model;
[0022] Figure 3 This is a cross-sectional view of the combination of the card holder and the oil drum of this utility model.
[0023] In the diagram: 1. Jack body; 2. Jack seat; 3. Oil drum; 30. First sealing ring; 4. Protective cover; 40. Second sealing ring; 5. Piston rod; 6. Locking bolt; 7. Glass; 8. Protective pad; 9. Guide rod; 10. Sealing sleeve; 11. Stop block; 12. Vertical rod; 13. Spring. Detailed Implementation
[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0025] To facilitate lubrication of the piston rod 5, as one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3As shown, the self-lubricating structure of the jack according to this utility model includes a jack body 1, a piston rod 5 inside the jack body 1 (the specific principle of which will not be elaborated here), a retaining seat 2 and an oil tank 3 on both sides of the piston rod 5, a locking bolt 6 on both sides of the jack body 1, two first screw holes adapted to the locking bolts 6 on each of the two retaining seats 2, external threads at the bottom of each of the two oil tanks 3, second screw holes adapted to the external threads at the bottom of each of the two retaining seats 2, a protective cap 4 threaded to the top of each of the two oil tanks 3, an oil storage chamber inside each of the two retaining seats 2, the second screw holes communicating with the oil storage chamber, multiple oil outlet holes on the sidewalls of each of the two retaining seats 2 near the piston rod 5, and an oil drain hole at the bottom of each of the two oil tanks 3.
[0026] When in use, unscrew the protective cap 4, add a certain amount of lubricating oil to the oil drum 3, tighten the protective cap 4, and install the oil drum 3 on the mounting base 2. When the jack body 1 is in use, the lubricating oil enters the oil storage chamber through the drain hole, and the lubricating oil in the oil storage chamber is discharged to the piston rod 5 through the oil outlet hole, forming a lubricating oil film on the outer circumference of the piston rod 5 to reduce the wear caused by friction between the piston rod 5 and the inner wall of the cylinder when the piston rod 5 is raised and lowered, thereby extending the overall service life and facilitating long-term use.
[0027] To prevent accidental leakage of lubricating oil from oil drum 3, for example, such as Figure 3 As shown, each of the two oil drums 3 is provided with a guide rod 9, and each of the two guide rods 9 is fixed with a conical sealing sleeve 10 by adhesive. Each of the two guide rods 9 is welded and fixed with a vertical rod 12, and each of the two vertical rods 12 is fitted with a spring 13. Each of the two oil drums 3 is welded and fixed with a stop block 11, and each of the two stop blocks 11 is provided with a through hole that matches the vertical rod 12.
[0028] Before removing the oil drum 3 from the mounting base 2, the bottom end of the guide rod 9 abuts against the inner wall of the mounting base 2, the spring 13 is in a compressed state, and the oil drain hole at the bottom of the oil drum 3 is not blocked by the sealing sleeve 10. The lubricating oil in the oil drum 3 can flow smoothly into the oil storage chamber. When it is necessary to remove the oil drum 3 for refueling, the oil drum 3 can be removed from the mounting base 2 by rotating the oil drum 3. At this time, the bottom end of the guide rod 9 no longer abuts against the inner wall of the mounting base 2, the spring 13 pushes the guide rod 9 down, and the sealing sleeve 10 blocks the oil drain hole at the bottom of the oil drum 3 to prevent the lubricating oil from flowing out through the oil drain hole when refueling the oil drum 3 or during the transfer of the oil drum 3. After injecting lubricating oil into the oil drum 3, the oil drum 3 is installed on the mounting base 2, the bottom end of the guide rod 9 abuts against the inner wall of the mounting base 2, the sealing sleeve 10 moves up, and the blockage of the oil drain hole is released.
[0029] To protect the jack body 1, for example, such as Figure 2 As shown, protective pads 8 are fixed inside both card holders 2 by adhesive.
[0030] To facilitate observation of the oil level in oil drum 3, for example, as shown... Figure 1 As shown, both oil drums 3 have observation ports on their side walls, and both observation ports have glass 7 inside. The glass 7 is connected to the oil drums 3 by adhesive.
[0031] To improve sealing, for example, such as Figure 3 As shown, the bottom ends of the two oil drums 3 are each fixed with a first sealing ring 30 by adhesive, and the bottom ends of the two protective covers 4 are each fixed with a second sealing ring 40 by adhesive.
[0032] To facilitate the disassembly and assembly of the oil drum 3 and the protective cover 4, for example, as shown below. Figure 1 As shown, the outer walls of both oil drums 3 are integrally formed with multiple anti-slip protrusions, and the outer walls of both protective covers 4 are provided with multiple anti-slip patterns.
[0033] When using this utility model, before the oil drum 3 is removed from the card seat 2, the bottom end of the guide rod 9 abuts against the inner wall of the card seat 2, the spring 13 is in a compressed state, the oil drain hole at the bottom of the oil drum 3 is not blocked by the sealing sleeve 10, the lubricating oil in the oil drum 3 can flow smoothly into the oil storage chamber, and the lubricating oil in the oil storage chamber is discharged to the piston rod 5 through the oil outlet hole, forming a lubricating oil film on the outer periphery of the piston rod 5, so as to reduce the wear caused by friction between the piston rod 5 and the inner wall of the cylinder when the piston rod 5 rises and falls, thereby extending the overall service life and being beneficial for long-term use;
[0034] When it is necessary to remove the oil drum 3 for refueling, simply rotate the oil drum 3 to remove it from the mounting bracket 2. At this time, the bottom end of the guide rod 9 will no longer be in contact with the inner wall of the mounting bracket 2. The spring 13 will push the guide rod 9 downward, and the sealing sleeve 10 will block the oil drain hole at the bottom of the oil drum 3 to prevent lubricating oil from flowing out through the oil drain hole when refueling the oil drum 3 or during the transfer of the oil drum 3. After injecting lubricating oil into the oil drum 3, install the oil drum 3 on the mounting bracket 2. The bottom end of the guide rod 9 will be in contact with the inner wall of the mounting bracket 2, and the sealing sleeve 10 will move upward to release the blockage of the oil drain hole.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents. Contents not described in detail in this utility model are considered prior art known to those skilled in the art.
Claims
1. A self-lubricating structure for a jack, characterized in that, The jack includes a jack body (1), a piston rod (5) inside the jack body (1), a jack seat (2) and an oil drum (3) on both sides of the piston rod (5), a locking bolt (6) on both sides of the jack body (1), two first screw holes adapted to the locking bolts (6) on each of the two jack seats (2), external threads on the bottom of each of the two oil drums (3), second screw holes adapted to the external threads on the bottom of each of the two jack seats (2), a protective cover (4) threaded to the top of each of the two oil drums (3), an oil storage chamber inside each of the two jack seats (2), the second screw holes communicating with the oil storage chamber, multiple oil outlet holes on the side walls of each of the two jack seats (2) near the piston rod (5), and an oil drain hole at the bottom of each of the two oil drums (3).
2. The self-lubricating jack structure according to claim 1, characterized in that, Both oil drums (3) are equipped with guide rods (9), and both guide rods (9) are fixed with conical sealing sleeves (10). Both guide rods (9) are fixed with vertical rods (12) at their top ends. Both vertical rods (12) are fitted with springs (13). Both oil drums (3) are fixed with stop blocks (11), and both stop blocks (11) are provided with through holes that are adapted to the vertical rods (12).
3. The self-lubricating structure for a jack according to claim 1, characterized in that, Protective pads (8) are fixed inside both of the card holders (2).
4. The self-lubricating structure for a jack according to claim 1, characterized in that, Both oil drums (3) have observation ports on their side walls, and both observation ports are equipped with glass (7).
5. The self-lubricating structure for a jack according to claim 1, characterized in that, The bottom ends of the two oil drums (3) are each fixed with a first sealing ring (30), and the bottom ends of the two protective covers (4) are each fixed with a second sealing ring (40).
6. The self-lubricating structure for a jack according to claim 1, characterized in that, The outer walls of both oil drums (3) are integrally formed with multiple anti-slip protrusions, and the outer walls of both protective covers (4) are provided with multiple anti-slip patterns.