Dustproof device for piston rod of hydraulic oil cylinder

Abstract

The utility model discloses a dustproof device of a hydraulic oil cylinder piston rod, and relates to the field of dustproof equipment. Comprising a hydraulic oil cylinder, an oil cylinder base is fixedly installed at the bottom of the hydraulic oil cylinder, a piston rod is installed on the hydraulic oil cylinder, a dustproof mechanism is arranged at the position of the piston rod on the hydraulic oil cylinder and comprises a folding rubber sleeve arranged on the piston rod in a sleeving mode, and an upper positioning base is fixedly installed at the upper end of the folding rubber sleeve; a lower positioning seat is fixedly installed at the lower end of the folding rubber sleeve, a sealing ring is arranged at the bottom of the lower positioning seat, and a sealing mechanism is connected to the upper positioning seat. According to the dustproof device of the hydraulic oil cylinder piston rod, after the dustproof mechanism is arranged on the piston rod in the sleeved mode, the folding rubber sleeve can prevent the piston rod from making contact with the outside, so that a plating layer of the piston rod is prevented from being corroded, the sealing ring and the sealing mechanism can seal the two ends of the folding rubber sleeve, and tiny dust is prevented from entering. And the abrasion of the sealing element is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of dust-proof equipment, and particularly relates to a dust-proof device for a hydraulic cylinder piston rod. Background Technique

[0002] A hydraulic cylinder is an important hydraulic transmission device, and its core function is to convert the pressure energy of a liquid into mechanical energy to achieve linear reciprocating motion. It mainly consists of components such as a cylinder barrel, a piston, a piston rod, and seals, with a simple structure and reliable operation. Its principle is based on Pascal's law, that is, the magnitude of the pressure transmitted by a liquid in a closed container is proportional to the transmitted force. When pressure is applied at the inlet of the hydraulic cylinder, the liquid will push the piston outward to generate a linear force; when pressure is applied at the outlet, the liquid will cause the piston to move inward to generate a force in the opposite direction.

[0003] When the hydraulic cylinder is actually applied, it may work in harsh environments such as easy corrosion, sandy dust, and muddy conditions, which will cause the coating of the exposed cylinder piston rod to corrode and the surface to become rough. During reciprocating motion, it will wear the seals, easily cause oil leakage, and various quality accidents will occur, directly affecting the efficiency or service life of construction machinery products. For this reason, a dust-proof device for a hydraulic cylinder piston rod is proposed. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a dust-proof device for a hydraulic cylinder piston rod, which can effectively solve the problems mentioned in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A dust-proof device for a hydraulic cylinder piston rod, including a hydraulic cylinder, a cylinder base is fixedly installed at the bottom of the hydraulic cylinder, mounting screw holes are opened at the edge of the cylinder base, a piston rod is installed on the hydraulic cylinder, and a dust-proof mechanism is provided at the piston rod of the hydraulic cylinder. The dust-proof mechanism includes a folding rubber sleeve sleeved on the piston rod, an upper positioning seat is fixedly installed at the upper end of the folding rubber sleeve, a lower positioning seat is fixedly installed at the lower end of the folding rubber sleeve, a sealing ring is provided at the bottom of the lower positioning seat, and a sealing mechanism is connected to the upper positioning seat. The sealing mechanism includes an annular sealing seat fixed on the upper positioning seat, and a sealing airbag is arranged inside the annular sealing seat. After inflating the sealing airbag, it will expand.

[0007] Furthermore, an installation through hole is opened on the lower positioning seat, threaded holes are opened on both sides of the upper positioning seat, and fixing screws are arranged in the threaded holes, and the fixing screws will fix the upper positioning seat.

[0008] Furthermore, a screw is provided in the installation through-hole, and the lower positioning seat is fixed at the upper end of the hydraulic cylinder by the screw, so that the lower end of the folding rubber sleeve is connected to the upper end of the hydraulic cylinder.

[0009] Furthermore, the fixing screw is installed on the upper positioning seat through a threaded hole, the upper positioning seat is fixed on the piston rod by the fixing screw, the lower end of the folding rubber sleeve is fixed at the upper end of the hydraulic cylinder through the lower positioning seat, and the upper end of the folding rubber sleeve is fixed at the upper end of the piston rod through the upper positioning seat, so that the upper end of the folding rubber sleeve is connected to the upper end of the piston rod.

[0010] Furthermore, the sealing mechanism further includes an exhaust port and an inflation port fixed on the sealing airbag. A one-way valve is provided in the inflation port, a sealing end cover is provided at the end of the exhaust port, a positioning groove is formed in the annular sealing seat, and component through-holes are formed on both sides of the annular sealing seat. The exhaust port and the inflation port are located in the component through-holes.

[0011] Furthermore, a sealing glue is coated on the bottom of the annular sealing seat, and the annular sealing seat is fixed on the upper positioning seat by the sealing glue.

[0012] Furthermore, the sealing airbag is installed in the annular sealing seat through the positioning groove, the exhaust port and the inflation port extend out of the annular sealing seat through the component through-holes on both sides, the one-way valve only allows gas to enter the sealing airbag through the inflation port, and the one-way valve can prevent the gas in the sealing airbag from flowing back.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. By the combined use of the upper positioning seat and the lower positioning seat, the folding rubber sleeve can be sleeved on the piston rod. When the piston rod extends, the folding rubber sleeve will unfold, and when the piston rod retracts, the folding rubber sleeve will contract together, so that the folding rubber sleeve is always sleeved on the piston rod, which can prevent the piston rod from contacting the outside world, and further prevent the coating of the piston rod from being corroded.

[0015] 2. The sealing ring will be pressed tightly between the lower positioning seat and the hydraulic cylinder to seal the lower end of the folding rubber sleeve. Secondly, the sealing airbag can be inflated through the inflation port. After inflating the sealing airbag, it will expand, and the expanded sealing airbag will fill the gap between the annular sealing seat and the piston rod to seal the upper end of the folding rubber sleeve, thereby preventing fine dust from entering and further reducing the wear of the sealing parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the utility model;

[0017] Figure 2 is the basic structural schematic diagram of the utility model;

[0018] Figure 3 Schematic diagram of the dust-proof mechanism of the present utility model;

[0019] Figure 4 Schematic diagram of the sealing mechanism of the present utility model.

[0020] In the figure: 1, piston rod; 2, hydraulic cylinder; 3, cylinder base; 4, mounting screw hole; 5, dust-proof mechanism; 501, folding rubber sleeve; 502, fixing screw; 503, upper positioning seat; 504, threaded hole; 505, lower positioning seat; 506, mounting through hole; 507, sealing ring; 6, sealing mechanism; 601, positioning groove; 602, annular sealing seat; 603, sealing end cover; 604, exhaust port; 605, sealing airbag; 606, inflation port; 607, one-way valve; 608, component through hole. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] As Figure 1 Figure 2 As shown, a dust-proof device for a piston rod of a hydraulic cylinder includes a hydraulic cylinder 2, a cylinder base 3 is fixedly installed at the bottom of the hydraulic cylinder 2, mounting screw holes 4 are opened at the edge of the cylinder base 3, a piston rod 1 is installed on the hydraulic cylinder 2, a dust-proof mechanism 5 is provided at the piston rod 1 on the hydraulic cylinder 2, the dust-proof mechanism 5 includes a folding rubber sleeve 501 sleeved on the piston rod 1, an upper positioning seat 503 is fixedly installed at the upper end of the folding rubber sleeve 501, a lower positioning seat 505 is fixedly installed at the lower end of the folding rubber sleeve 501, a sealing ring 507 is provided at the bottom of the lower positioning seat 505, a sealing mechanism 6 is connected to the upper positioning seat 503, the sealing mechanism 6 includes an annular sealing seat 602 fixed on the upper positioning seat 503, a sealing airbag 605 is arranged in the annular sealing seat 602. During use, the dust-proof mechanism 5 can be sleeved on the piston rod 1. After the dust-proof mechanism 5 is sleeved on the piston rod 1, the folding rubber sleeve 501 can prevent the piston rod 1 from contacting the outside world, thereby preventing the coating of the piston rod 1 from being corroded. Secondly, the sealing ring 507 and the sealing mechanism 6 can seal both ends of the folding rubber sleeve 501 to prevent fine dust from entering, further reducing the wear of the sealing parts and extending the service life of the hydraulic cylinder 2.

[0023] As Figure 3As shown in the figure, the dust-proof mechanism 5 includes a folding rubber sleeve 501 sleeved on the piston rod 1. The upper end of the folding rubber sleeve 501 is fixedly installed with an upper positioning seat 503, and the lower end of the folding rubber sleeve 501 is fixedly installed with a lower positioning seat 505. A sealing ring 507 is provided at the bottom of the lower positioning seat 505. An installation through hole 506 is opened on the lower positioning seat 505, and threaded holes 504 are opened on both sides of the upper positioning seat 503. Fixing screws 502 are provided in the threaded holes 504.

[0024] Specifically, by the combined use of the upper positioning seat 503 and the lower positioning seat 505, the folding rubber sleeve 501 can be sleeved on the piston rod 1. When the piston rod 1 extends, the folding rubber sleeve 501 will expand, and when the piston rod 1 retracts, the folding rubber sleeve 501 will contract together, so that the folding rubber sleeve 501 is always sleeved on the piston rod 1, which can prevent the piston rod 1 from contacting the outside world, thereby preventing the coating of the piston rod 1 from being corroded.

[0025] As Figure 4 shown in the figure, the sealing mechanism 6 includes an annular sealing seat 602 fixed to the upper positioning seat 503. A sealing airbag 605 is provided in the annular sealing seat 602. The sealing mechanism 6 further includes an exhaust port 604 and an inflation port 606 fixed to the sealing airbag 605. A one-way valve 607 is provided in the inflation port 606. A sealing end cap 603 is provided at the end of the exhaust port 604. A positioning groove 601 is opened in the annular sealing seat 602, and component through holes 608 are opened on both sides of the annular sealing seat 602.

[0026] Specifically, after the lower positioning seat 505 is fixed, the sealing ring 507 is pressed tightly between the lower positioning seat 505 and the hydraulic cylinder 2 to seal the lower end of the folding rubber sleeve 501. Secondly, the sealing airbag 605 can be inflated through the inflation port 606. After being inflated into the sealing airbag 605, it will expand. After the sealing airbag 605 expands, it will fill the gap between the annular sealing seat 602 and the piston rod 1 to seal the upper end of the folding rubber sleeve 501, thereby preventing fine dust from entering and further reducing the wear of the sealing parts.

[0027] It should be noted that the present utility model is a dust-proof device for a hydraulic cylinder piston rod. During actual use, the folding rubber sleeve 501 is sleeved on the piston rod 1. After the folding rubber sleeve 501 is sleeved on the piston rod 1, the upper positioning seat 503 and the lower positioning seat 505 are fixed. Since the upper positioning seat 503 is fixed on the piston rod 1 by the fixing screw 502, the upper end of the folding rubber sleeve 501 is fixed at the upper end of the piston rod 1 through the upper positioning seat 503, and the lower end of the folding rubber sleeve 501 is fixed at the upper end of the hydraulic cylinder 2 through the lower positioning seat 505. Therefore, after the upper positioning seat 503 and the lower positioning seat 505 are fixed, the folding rubber sleeve 501 can be fixed outside the piston rod 1. When the piston rod 1 extends, the folding rubber sleeve 501 will unfold, and when the piston rod 1 retracts, the folding rubber sleeve 501 will contract together, so that the folding rubber sleeve 501 is always sleeved on the piston rod 1, preventing the piston rod 1 from contacting the outside world and reducing the corrosion of the coating on the piston rod 1. Secondly, air is inflated into the sealing airbag 605 through the air inlet 606. Since the sealing airbag 605 is installed in the annular sealing seat 602 through the positioning groove 601, the exhaust port 604 and the air inlet 606 extend out of the annular sealing seat 602 through the component through holes 608 on both sides. The one-way valve 607 only allows gas to enter the sealing airbag 605 through the air inlet 606. Therefore, after the air is inflated into the sealing airbag 605, it will expand. After the sealing airbag 605 expands, it will fill the gap between the annular sealing seat 602 and the piston rod 1, sealing the upper end of the folding rubber sleeve 501 and further reducing the wear of the sealing member. At the same time, the user can unscrew the sealing end cover 603. After the sealing end cover 603 is unscrewed, the gas in the sealing airbag 605 will be discharged, facilitating the user to remove the entire sealing mechanism 6.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used 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 perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A dust prevention device for a hydraulic cylinder piston rod, comprising a hydraulic cylinder (2), a cylinder base (3) fixedly mounted at the bottom of the hydraulic cylinder (2), a mounting screw hole (4) being provided at the edge of the cylinder base (3), a piston rod (1) being mounted on the hydraulic cylinder (2), characterized in that: A dustproof mechanism (5) is provided at the piston rod (1) on the hydraulic cylinder (2), and the dustproof mechanism (5) comprises a folding rubber sleeve (501) sleeved on the piston rod (1), an upper positioning seat (503) is fixedly mounted on the upper end of the folding rubber sleeve (501), a lower positioning seat (505) is fixedly mounted on the lower end of the folding rubber sleeve (501), a sealing ring (507) is provided at the bottom of the lower positioning seat (505), and a sealing mechanism (6) is connected to the upper positioning seat (503), and the sealing mechanism (6) comprises an annular sealing seat (602) fixed on the upper positioning seat (503), and a sealing airbag (605) is provided in the annular sealing seat (602).

2. The dust prevention device for a hydraulic cylinder piston rod according to claim 1, characterized in that: The lower positioning seat (505) is provided with a mounting through hole (506), and threaded holes (504) are provided on both sides of the upper positioning seat (503), and fixing screws (502) are provided in the threaded holes (504).

3. The dust prevention device for the hydraulic cylinder piston rod according to claim 2, characterized in that: The mounting through hole (506) is provided with a screw, and the lower positioning seat (505) is fixed to the upper end of the hydraulic cylinder (2) by means of the screw.

4. The dust prevention device for the hydraulic cylinder piston rod according to claim 3, characterized in that: The fixing screw (502) is installed on the upper positioning seat (503) through the threaded hole (504); the upper positioning seat (503) is fixed to the piston rod (1) through the fixing screw (502); the upper end of the folding rubber sleeve (501) is fixed to the upper end of the piston rod (1) through the upper positioning seat (503); and the lower end of the folding rubber sleeve (501) is fixed to the upper end of the hydraulic cylinder (2) through the lower positioning seat (505).

5. The dust prevention device for the hydraulic cylinder piston rod according to claim 4, characterized in that: The sealing mechanism (6) further comprises an exhaust port (604) and an inflation port (606) fixed on the sealing airbag (605); a one-way valve (607) is provided in the inflation port (606); a sealing end cover (603) is provided at the end of the exhaust port (604); a positioning groove (601) is provided in the annular sealing seat (602); and component through holes (608) are provided on both sides of the annular sealing seat (602).

6. The dust prevention device for the hydraulic cylinder piston rod according to claim 5, characterized in that: The bottom of the annular sealing seat (602) is coated with sealant, and the annular sealing seat (602) is fixed on the upper positioning seat (503) by the sealant.

7. The dust prevention device for the hydraulic cylinder piston rod according to claim 6, characterized in that: The sealing airbag (605) is installed in the annular sealing seat (602) through the positioning groove (601), the exhaust port (604) and the inflation port (606) extend out of the annular sealing seat (602) through the component through holes (608) on both sides, and the one-way valve (607) only allows gas to enter the sealing airbag (605) through the inflation port (606).

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