A hydraulic cylinder with a dust cover

Abstract

The present invention relates to the technical field of hydraulic cylinders, and specifically to a hydraulic cylinder with a dust cover, comprising a hydraulic cylinder body, a piston rod movably connected to the top of the hydraulic cylinder body, a reserved groove being provided at the top of the hydraulic cylinder body, a mounting frame being provided inside the reserved groove, a liquid storage chamber being provided inside the mounting frame, lubricating oil being filled inside the liquid storage chamber, and an oil drain hole being provided on the inner ring surface of the mounting frame; the beneficial effects are as follows: the hydraulic cylinder with a dust cover proposed by the present invention, by providing a flexible dust cover and a collar, and by using a clamping screw rod 2 to firmly fix the collar on the piston rod, when the piston rod is extended, the collar can pull the flexible dust cover to unfold, thereby achieving comprehensive protection of the extended part of the piston rod, and effectively preventing the invasion of dust and impurities.

Description

Technical Field

[0001] The invention relates to the field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a dust cover. Background Art

[0002] In hydraulic transmission systems, hydraulic cylinders are important actuators and are widely used in various mechanical equipment. However, during the use of traditional hydraulic cylinders, the piston rod is easily contaminated by external dust and impurities during the extension and retraction process, which not only affects the normal operation of the hydraulic cylinder, but also shortens its service life. At the same time, the piston rod needs good lubrication during reciprocating motion to reduce wear and friction. The traditional lubrication method is often to apply lubricating oil regularly by hand, which is not only inefficient, but also difficult to ensure the uniformity and continuity of lubrication.

[0003] In order to solve the above problems, some hydraulic cylinders with dustproof and automatic lubrication functions have appeared in the prior art. However, these hydraulic cylinders still have some deficiencies in structural design and functional realization. For example, the dust cover is not fixed firmly enough and is easy to loosen or fall off during the extension and retraction of the piston rod; the storage and supply methods of lubricating oil are not reasonable enough to ensure that the piston rod can be fully lubricated throughout the entire stroke. Summary of the invention

[0004] The object of the present invention is to provide a hydraulic cylinder with a dust cover to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic cylinder with a dust cover, comprising a hydraulic cylinder body, a piston rod movably connected to the top of the hydraulic cylinder body, a reserved groove is provided at the top of the hydraulic cylinder body, a mounting frame is sleeved inside the reserved groove, a liquid storage cavity is provided inside the mounting frame, the liquid storage cavity is filled with lubricating oil, an oil drain hole is provided on the inner ring surface of the mounting frame, the oil drain hole and the liquid storage cavity are connected, a receiving groove is provided on the top surface of the hydraulic cylinder body, a flexible dust cover is fixed inside the receiving groove, a ring is fixed on the top of the flexible dust cover, and the ring is sleeved on the top of the piston rod.

[0006] Preferably, the reserved groove is an annular groove, the mounting frame is an annular plate with an "L"-shaped cross section, a mounting groove is provided on the top surface of the mounting frame, a sealed bearing is fixed inside the mounting groove, and the inner ring of the sealed bearing is sleeved on the piston rod.

[0007] Preferably, a clamping screw rod 1 is screwed onto the outer wall of the mounting frame, the clamping screw rod 1 is located below the receiving groove, a plurality of clamping screw rods 1 are provided, and the plurality of clamping screw rods 1 are arranged and distributed around the outer annular surface of the mounting frame.

[0008] Preferably, the liquid storage chamber is in the form of an annular groove, an oil-absorbing cotton cover is fixed inside the liquid storage chamber, the oil-absorbing cotton cover is in the form of an annular plate with an "L"-shaped cross-section, the oil-absorbing cotton cover is sleeved on the inner annular surface of the liquid storage chamber, an oil-absorbing cotton core is fixed on the inner annular surface of the oil-absorbing cotton cover, and one end of the oil-absorbing cotton core extends into the top inner annular opening of the mounting frame.

[0009] Preferably, a rubber ring is fixed in the inner ring opening at the top of the mounting frame, two rubber rings are provided, the oil-absorbing cotton core is located between the two rubber rings, and the rubber ring is sleeved on the piston rod.

[0010] Preferably, an oil filling port is provided on the top surface of the mounting bracket, the oil filling port is connected to the liquid storage chamber, a threaded seal is inserted into the interior of the oil filling port, the threaded seal is a "T"-shaped circular plate, an internal thread is provided on the surface of the oil filling port, and an external thread is provided on the surface of the threaded seal, and the internal thread and the external thread are matched and connected.

[0011] Preferably, a pick-out groove is provided on the top surface of the screw-on seal head, a plurality of air inlet micropores are provided on the bottom surface of the pick-out groove, a sponge pad is fixed to the bottom surface of the pick-out groove, the sponge pad is an annular plate structure, and the sponge pad covers the plurality of air inlet micropores.

[0012] Preferably, a screwing handle is fixed to the bottom surface of the picking groove, the screwing handle is a "cross" shaped plate structure, the screwing handle is located in the inner ring opening of the sponge pad, and the height of the screwing handle is smaller than the height of the picking groove.

[0013] Preferably, the collar is an I-shaped circular ring plate, and a second clamping screw is threadedly connected to the surface of the collar. The second clamping screw passes through the collar and clamps the piston rod.

[0014] Preferably, the receiving groove is an annular groove, and the flexible dust cover is a cylindrical cover.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The hydraulic cylinder with a dust cover proposed by the present invention is provided with a flexible dust cover and a collar, and the collar is firmly fixed on the piston rod by means of a clamping screw. When the piston rod is extended, the collar can pull the flexible dust cover to unfold, thereby achieving comprehensive protection for the extended part of the piston rod and effectively preventing the intrusion of dust and impurities. The liquid storage chamber, oil-absorbing cotton cover, oil-absorbing cotton core and other structures arranged inside the mounting frame can store and continuously supply lubricating oil to the piston rod. When the piston rod is raised or lowered, the rubber ring will evenly apply the lubricating oil adsorbed on the oil-absorbing cotton core to the piston rod, thereby achieving automatic lubrication of the piston rod, reducing wear and friction, and improving the working efficiency and service life of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a top view of the structure of the present invention;

[0019] Figure 3 for Figure 2 Structural cross-section view at AA in the middle;

[0020] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0021] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0022] Figure 6 for Figure 4 A magnified schematic diagram of the structure at C in the middle;

[0023] Figure 7 This is a schematic diagram of the ring structure of the present invention;

[0024] Figure 8 This is a schematic diagram of the mounting frame structure of the present invention;

[0025] Fig. 9 This is a schematic diagram of the screw-connected head structure of the present invention;

[0026] Fig.10 It is a schematic diagram of the structure of the hydraulic cylinder body of the present invention.

[0027] In the figure: hydraulic cylinder body 1, reserved groove 2, mounting frame 3, clamping screw 1 4, mounting groove 5, sealing bearing 6, liquid storage chamber 7, oil drain hole 8, rubber ring 9, oil absorbing cotton cover 10, oil absorbing cotton core 11, oil filling port 12, screw-on head 13, pick-up groove 14, air inlet micropore 15, sponge pad 16, screw handle 17, collar 18, clamping screw 2 19, flexible dust cover 20, storage groove 21. DETAILED DESCRIPTION

[0028] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 10The present invention provides a technical solution: a hydraulic cylinder with a dust cover, comprising a hydraulic cylinder body 1, a piston rod is movably connected to the top of the hydraulic cylinder body 1, a reserved groove 2 is provided at the top of the hydraulic cylinder body 1, a mounting bracket 3 is sleeved inside the reserved groove 2, the reserved groove 2 is an annular groove, the mounting bracket 3 is an annular plate with an "L"-shaped cross section, a mounting groove 5 is provided on the top surface of the mounting bracket 3, a sealing bearing 6 is fixed inside the mounting groove 5, the inner ring of the sealing bearing 6 is sleeved on the piston rod, a clamping screw 4 is screwed on the outer wall of the mounting bracket 3, the clamping screw 4 is located below the receiving groove 21, a plurality of clamping screws 4 are provided, and the plurality of clamping screws 4 are arranged and distributed around the outer ring surface of the mounting bracket 3; the mounting bracket 3 is sleeved in the reserved groove 2, and then the clamping screw 4 is screwed to clamp the side wall of the reserved groove 2, so as to fix the mounting bracket 3 in the reserved groove 2, and the sealing bearing 6 is sleeved on the piston rod.

[0030] A liquid storage chamber 7 is provided inside the mounting frame 3, and lubricating oil is filled inside the liquid storage chamber 7. An oil drain hole 8 is provided on the inner ring surface of the mounting frame 3, and the oil drain hole 8 is communicated with the liquid storage chamber 7. The liquid storage chamber 7 is an annular groove, and an oil-absorbing cotton cover 10 is fixed inside the liquid storage chamber 7. The oil-absorbing cotton cover 10 is a circular ring plate with an "L"-shaped cross section, and the oil-absorbing cotton cover 10 is sleeved on the inner ring surface of the liquid storage chamber 7. An oil-absorbing cotton core 11 is fixed on the inner ring surface of the oil-absorbing cotton cover 10, and one end of the oil-absorbing cotton core 11 extends into the inner ring opening at the top of the mounting frame 3. A rubber ring 9 is fixed in the inner ring opening at the top of the mounting frame 3, and two rubber rings 9 are provided. The oil-absorbing cotton core 11 is located between the two rubber rings 9, and the rubber ring 9 is sleeved on the piston rod; an oil filling port 12 is provided on the top surface of the mounting frame 3, and the oil filling port 1 2 is communicated with the liquid storage chamber 7, a screw-connected sealing head 13 is inserted into the interior of the oil filling port 12, and the screw-connected sealing head 13 is a "T"-shaped circular plate. The surface of the oil filling port 12 is provided with an internal thread, and the surface of the screw-connected sealing head 13 is provided with an external thread, and the internal thread and the external thread are matched and connected; a pick-up groove 14 is provided on the top surface of the screw-connected sealing head 13, and a plurality of air inlet micropores 15 are provided on the bottom surface of the pick-up groove 14, and a sponge pad 16 is fixed to the bottom surface of the pick-up groove 14, and the sponge pad 16 is an annular plate-shaped structure, and the sponge pad 16 covers the plurality of air inlet micropores 15; a screwing handle 17 is fixed to the bottom surface of the pick-up groove 14, and the screwing handle 17 is a "cross"-shaped plate-shaped structure, and the screwing handle 17 is in the inner ring of the sponge pad 16, and the height of the screwing handle 17 is less than the height of the pick-up groove 14.

[0031] After the threaded cap 13 is removed from the oil filling port 12 by manually squeezing the screw handle 17, the lubricating oil is injected into the liquid storage chamber 7, and then the threaded cap 13 is screwed back to seal the oil filling port 12. After the lubricating oil inside the liquid storage chamber 7 penetrates the oil-absorbing cotton cover 10, the oil-absorbing cotton cover 10 absorbs the saturated lubricating oil and penetrates the oil-absorbing cotton core 11. The oil-absorbing cotton core 11 absorbs the saturated lubricating oil and drops it between the mounting frame 3 and the piston rod. When the piston rod is raised and lowered, the rubber ring 9 smears the lubricating oil on the piston rod to prevent the lubricating oil from dripping downwards. The air inlet micropores 15 are used to replenish air into the liquid storage chamber 7.

[0032] A receiving groove 21 is provided on the top surface of the hydraulic cylinder body 1, and a flexible dust cover 20 is fixed inside the receiving groove 21. A collar 18 is fixed to the top of the flexible dust cover 20. The collar 18 is sleeved on the top of the piston rod. The collar 18 is an "I"-shaped circular ring plate. A clamping screw 19 is screwed on the surface of the collar 18. The clamping screw 19 passes through the collar 18 and clamps the piston rod. The receiving groove 21 is an annular groove, and the flexible dust cover 20 is a cylindrical cover. After the collar 18 is sleeved on the piston rod and fixed by the clamping screw 19, when the piston rod is extended, the collar 18 pulls the flexible dust cover 20 to unfold, thereby realizing distributed protection for the extended piston rod.

[0033] The use process of the hydraulic cylinder with dust cover is as follows:

[0034] Ensure that the hydraulic cylinder body 1 and its parts (such as the piston rod, reserved groove 2, mounting bracket 3, etc.) are intact and have no signs of oil leakage or damage. Prepare an appropriate amount of lubricating oil to fill the liquid storage chamber 7 in the mounting bracket 3. Insert the "L"-shaped annular plate of the mounting bracket 3 into the reserved groove 2 of the hydraulic cylinder body 1, and ensure that the shape of the mounting bracket 3 matches the shape of the reserved groove 2. Screw the clamping screw 4 so that it clamps the side wall of the reserved groove 2, thereby firmly fixing the mounting bracket 3 in the reserved groove 2. Confirm that the sealed bearing 6 is correctly sleeved on the piston rod and ensure that it can rotate freely. Pinch the screw handle 17 by hand and screw the threaded seal 13 to remove it from the oil filling port 12. Inject an appropriate amount of lubricating oil into the liquid storage chamber 7 through the opened oil filling port 12. Screw the threaded seal 13 back onto the oil filling port 12 to ensure that it is tightly sealed to prevent lubricating oil leakage. Sleeve the collar 18 on the top of the piston rod, and ensure that the "I"-shaped circular ring plate of the collar 18 fits tightly with the piston rod. Screw the clamping screw 19 so that it passes through the collar 18 and clamps the piston rod, thereby fixing the collar 18 on the piston rod. Fix the bottom end of the flexible dust cover 20 in the storage groove 21 of the hydraulic cylinder body 1, and ensure that the dust cover can be expanded or contracted with the lifting and lowering of the piston rod. According to work requirements, operate the hydraulic cylinder to make the piston rod move up and down. During the lifting and lowering of the piston rod, observe whether the rubber ring 9 evenly applies the lubricating oil to the piston rod to ensure that the piston rod is well lubricated. When the piston rod is extended, observe whether the flexible dust cover 20 is unfolded and tightly fitted on the piston rod to prevent dust and debris from entering the hydraulic cylinder. Regularly check the working status of the hydraulic cylinder and its various parts, including the amount of lubricating oil, the integrity of the dust cover, etc. When it is found that the lubricating oil in the liquid storage chamber 7 is insufficient, replenish the lubricating oil through the oil filling port 12 in time. If the flexible dust cover 20 is found to be damaged or aged, it should be replaced with a new one in time.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with a dust cover, comprising a hydraulic cylinder body (1), the top end of the hydraulic cylinder body (1) being movably connected to a piston rod, characterized in that: The top of the hydraulic cylinder body (1) is provided with a reserved groove (2), the interior of the reserved groove (2) is sleeved with a mounting frame (3), the interior of the mounting frame (3) is provided with a liquid storage chamber (7), the interior of the liquid storage chamber (7) is filled with lubricating oil, the inner ring surface of the mounting frame (3) is provided with an oil drain hole (8), the oil drain hole (8) and the liquid storage chamber (7) are connected, the top surface of the hydraulic cylinder body (1) is provided with a receiving groove (21), the interior of the receiving groove (21) is fixed with a flexible dust cover (20), the top of the flexible dust cover (20) is fixed with a collar (18), and the collar (18) is sleeved on the top of the piston rod.

2. A hydraulic cylinder with a dust cover according to claim 1, characterized in that: The reserved groove (2) is an annular groove, the mounting frame (3) is an annular plate with an L-shaped cross section, a mounting groove (5) is provided on the top surface of the mounting frame (3), a sealing bearing (6) is fixed inside the mounting groove (5), and the inner ring of the sealing bearing (6) is sleeved on the piston rod.

3. The hydraulic cylinder with a dust cover according to claim 1, characterized in that: The outer wall of the mounting frame (3) is screwed with a clamping screw rod (4), the clamping screw rod (4) is located below the receiving groove (21), a plurality of clamping screw rods (4) are provided, and the plurality of clamping screw rods (4) are arranged and distributed around the outer ring surface of the mounting frame (3).

4. The hydraulic cylinder with a dust cover according to claim 1, characterized in that: The liquid storage chamber (7) is in the form of an annular groove. An oil-absorbing cotton cover (10) is fixed inside the liquid storage chamber (7). The oil-absorbing cotton cover (10) is in the form of an annular plate with an "L"-shaped cross section. The oil-absorbing cotton cover (10) is sleeved on the inner annular surface of the liquid storage chamber (7). An oil-absorbing cotton core (11) is fixed on the inner annular surface of the oil-absorbing cotton cover (10). One end of the oil-absorbing cotton core (11) extends into the inner annular opening at the top of the mounting frame (3).

5. A hydraulic cylinder with a dust cover according to claim 4, characterized in that: A rubber ring (9) is fixed in the inner ring opening at the top of the mounting frame (3), two rubber rings (9) are provided, the oil-absorbing cotton core (11) is located between the two rubber rings (9), and the rubber ring (9) is sleeved on the piston rod.

6. The hydraulic cylinder with a dust cover according to claim 1, characterized in that: The top surface of the mounting frame (3) is provided with an oil filling port (12), the oil filling port (12) is communicated with the liquid storage chamber (7), a screw-connected sealing head (13) is inserted into the interior of the oil filling port (12), the screw-connected sealing head (13) is a "T"-shaped circular plate, the surface of the oil filling port (12) is provided with an internal thread, the surface of the screw-connected sealing head (13) is provided with an external thread, and the internal thread and the external thread are matched and connected.

7. A hydraulic cylinder with a dust cover according to claim 6, characterized in that: The top surface of the screw-connected sealing head (13) is provided with a pick-out groove (14), the bottom surface of the pick-out groove (14) is provided with a plurality of air intake micropores (15), a sponge pad (16) is fixed to the bottom surface of the pick-out groove (14), the sponge pad (16) is in an annular plate structure, and the sponge pad (16) covers the plurality of air intake micropores (15).

8. The hydraulic cylinder with a dust cover according to claim 7, characterized in that: A screwing handle (17) is fixed to the bottom surface of the picking groove (14); the screwing handle (17) is a "cross"-shaped plate-like structure; the screwing handle (17) is located in the inner ring opening of the sponge pad (16); and the height of the screwing handle (17) is less than the height of the picking groove (14).

9. The hydraulic cylinder with a dust cover according to claim 1, characterized in that: The sleeve ring (18) is an I-shaped circular ring plate, and a second clamping screw rod (19) is screwed on the surface of the sleeve ring (18). The second clamping screw rod (19) penetrates the sleeve ring (18) and clamps the piston rod.

10. The hydraulic cylinder with a dust cover according to claim 1, characterized in that: The receiving groove (21) is an annular groove, and the flexible dust cover (20) is a cylindrical cover.

Images