Sealing assembly with lubricating oil groove

Abstract

The utility model relates to the technical field of hydraulic system sealing, and discloses a sealing assembly with a lubricating oil groove, which comprises a hydraulic oil cylinder and a piston rod which are sleeved, the tail part of the piston rod is fixedly connected with a sealing assembly, the sealing assembly is used for sealing the joint of the hydraulic oil cylinder and the piston rod, and the sealing assembly is a sealing mechanism. The sealing mechanism comprises a sealing rod, and the diameter of the sealing rod is equal to the inner diameter of the hydraulic oil cylinder. According to the sealing assembly with the lubricating oil groove, lubricating oil is injected into the oil storage cavity, and the lubricating oil in the oil storage cavity can seep into the oil drainage groove through the oil drainage hole and is sealed and limited by the inner wall of the hydraulic oil cylinder; the lubricating oil between the oil drainage grooves is smeared on the inner wall of the hydraulic oil cylinder through the movement of the sealing rod, so that the lubricating effect is achieved, high temperature and damage caused by friction are avoided, and the effect of protecting the hydraulic oil cylinder and the piston rod is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic system seals, in particular to a seal component with a lubricating oil groove. Background Art

[0002] Hydraulic systems are widely used in contemporary industrial equipment. Since hydraulic systems are often used in the middle force arm of mechanical equipment, the hydraulic system is used to drive the specified structure to move in a specified direction through the extension and contraction of the hydraulic system.

[0003] Chinese Patent Publication No.: CN 219673286 U discloses "A Sealing Assembly with a Lubricating Oil Groove", which includes a sealing assembly, which is composed of an oil cylinder, an L-shaped sealing ring, and an O-shaped sealing ring. An installation groove is provided on the inner wall of the oil cylinder, and the L-shaped sealing ring and the O-shaped sealing ring are both placed in the installation groove. The O-shaped sealing ring is snapped into the L-shaped groove of the L-shaped sealing ring. A piston rod is provided at the central axis position of the oil cylinder, and the L-shaped sealing ring is sleeved on the outside of the piston rod.

[0004] The L-shaped sealing ring can be used to improve the sealing performance of the sealing component and avoid leakage.

[0005] However, when the hydraulic system is working, there will be a large friction between the hydraulic cylinder and the piston rod due to the telescopic movement of the piston rod. This friction will cause a large amount of heat and wear on the hydraulic cylinder, thereby causing hydraulic oil leakage.

[0006] It can be seen that there is an urgent need for a sealing assembly with a lubricating oil groove, which can improve the lubricity while sealing the connection between the hydraulic cylinder and the piston rod, thereby protecting the hydraulic cylinder and the piston rod. Utility Model Content

[0007] The purpose of the utility model is to provide a sealing assembly with a lubricating oil groove to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: a sealing assembly with a lubricating oil groove, comprising a sleeved hydraulic cylinder and a piston rod, the tail of the piston rod is fixedly connected with a sealing assembly, the sealing assembly seals the connection between the hydraulic cylinder and the piston rod, the sealing assembly is a sealing mechanism, the sealing mechanism comprises a sealing rod, the diameter of the sealing rod is equal to the inner diameter of the hydraulic cylinder, the left axis of the sealing rod is fixedly connected with a connector, an oil storage cavity is provided inside the sealing rod and the connector, an oil filling port is provided at the end of the connector, the oil filling port is connected with the oil storage cavity, the lubricating oil is filled into the interior of the oil storage cavity through the oil filling port, and a sealing plug is provided on the oil filling port to seal the oil filling port;

[0009] An oil drain groove is formed on the outer surface of the sealing rod, and an oil drain hole is formed inside the oil drain groove.

[0010] Preferably, an outer surface of the connecting head is provided with an external thread, and the connecting head is threadedly connected to the end of the piston rod via the external thread.

[0011] Preferably, the oil drain holes are equidistantly distributed in a circumferential manner inside the oil drain groove, and capillary through holes are formed on the oil drain holes.

[0012] Preferably, a switch control mechanism is installed on the right side of the sealing rod, and the switch control mechanism is displaced when pressurized to open and close the oil drain hole.

[0013] Preferably, a limiting groove is provided on the back side of the oil drain hole on the inner wall of the oil storage cavity, and a through hole is provided on the right side axis of the sealing rod.

[0014] Preferably, the switch control mechanism includes a connecting plate, which is located inside the oil storage cavity, and the diameter of the connecting plate is the same as the inner diameter of the oil storage cavity. A sealing strip with the same number and position as the oil drain holes is fixedly connected to the left side of the connecting plate, and the sealing strip overlaps the inner wall of the oil storage cavity to seal the oil drain holes. An open opening is provided on the sealing strip, and the open opening is staggered with the oil storage cavity. A traction rod is fixedly connected to the right axis of the connecting plate, and the traction rod passes through the through hole. An elastic sheet is fixedly connected to the end of the traction rod, and both ends of the elastic sheet are fixed to the right side of the sealing rod.

[0015] Preferably, the sealing strip is located inside the limiting groove to seal the oil drain hole, and the length of the sealing strip is shorter than the length of the limiting groove.

[0016] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0017] First, the utility model pours lubricating oil into the oil storage chamber, and the lubricating oil in the oil storage chamber will seep out to the inside of the oil drain groove through the oil drain hole and be sealed and restricted by the inner wall of the hydraulic cylinder. When the piston rod performs telescopic movement, the lubricating oil between the oil drain grooves will be smeared on the inner wall of the hydraulic cylinder through the movement of the sealing rod, thereby playing a lubricating role to avoid high temperature and damage due to friction, thereby achieving the effect of protecting the hydraulic cylinder and the piston rod.

[0018] Secondly, the utility model drives the sealing strip by setting a connecting plate, and installs a traction rod and an elastic sheet on the right side of the connecting plate. When the elastic sheet is subjected to the pressure of hydraulic oil, it will push the traction rod to move the connecting plate to the left, so that the sealing strip is located at a position that allows the capillary through hole on the opening and the oil drain hole to be misaligned, so that the capillary through hole and the oil drain groove are connected to discharge oil, thereby avoiding waste of lubricating oil and achieving the effect of saving lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the installation structure of the utility model;

[0020] Figure 2 This is a left side view of the sealing assembly structure of the utility model;

[0021] Figure 3 This is a left side view of the sealing assembly structure of the utility model;

[0022] Figure 4 This is a cross-sectional view of the sealing component structure of the utility model;

[0023] Figure 5 This is a cross-sectional view of the sealing mechanism of the utility model;

[0024] Figure 6 This is a schematic diagram of the switch control mechanism structure of the utility model.

[0025] Among them: 1. hydraulic cylinder; 2. piston rod; 3. sealing mechanism; 301. sealing rod; 302. connecting head; 303. oil storage chamber; 304. oil filling port; 305. oil drain groove; 306. oil drain hole; 307. limiting groove; 308. through hole; 4. switch control mechanism; 401. connecting plate; 402. sealing strip; 403. opening; 404. traction rod; 405. elastic sheet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-6 , a sealing assembly with a lubricating oil groove, comprising a sleeved hydraulic cylinder 1 and a piston rod 2, the tail of the piston rod 2 is fixedly connected with a sealing assembly, and the sealing assembly seals the connection between the hydraulic cylinder 1 and the piston rod 2;

[0028] The sealing assembly is a sealing mechanism 3, which includes a sealing rod 301. The diameter of the sealing rod 301 is equal to the inner diameter of the hydraulic cylinder 1, so as to achieve sealing of the hydraulic oil. The left axis of the sealing rod 301 is fixedly connected with a connector 302, which is fixedly connected to the end of the piston rod 2 through the connector 302. An oil storage chamber 303 is provided inside the sealing rod 301 and the connector 302. An oil filling port 304 is provided at the end of the connector 302. The inside of the oil storage chamber 303 can be filled with a large amount of lubricating oil through the oil filling port 304. The oil filling port 304 is connected with the oil storage chamber 303. A large amount of lubricating oil is injected into the inside of the oil storage chamber 303 through the oil filling port 304 to avoid the need for frequent addition, and a sealing plug is provided on the oil filling port 304 to seal the oil filling port 304.

[0029] An oil drain groove 305 is formed on the outer surface of the sealing rod 301 to form a closed oil outlet space, and an oil drain hole 306 is formed inside the oil drain groove 305 to allow the lubricating oil to flow out to lubricate the inner wall of the hydraulic cylinder 1 .

[0030] Through the above technical solution, lubricating oil is poured into the oil storage chamber 303, and the lubricating oil inside the oil storage chamber 303 will seep into the oil drain groove 305 through the oil drain hole 306, and be sealed and restricted by the inner wall of the hydraulic cylinder 1. When the piston rod 2 performs telescopic movement, the lubricating oil between the oil drain grooves 305 will be smeared on the inner wall of the hydraulic cylinder 1 through the movement of the sealing rod 301, thereby playing a lubricating role to avoid high temperature and damage due to friction, thereby achieving the effect of protecting the hydraulic cylinder 1 and the piston rod 2.

[0031] Specifically, an outer surface of the connector 302 is provided with an external thread, and the connector 302 is threadedly connected to the end of the piston rod 2 via the external thread.

[0032] Through the above technical solution, the sealing rod 301 and the piston rod 2 are connected by bolt connection, so that the sealing rod 301 can be easily disassembled and assembled to facilitate maintenance and adding lubricating oil.

[0033] Specifically, the oil drain holes 306 are equidistantly distributed in a circumferential manner inside the oil drain groove 305 , and capillary through holes are formed on the oil drain holes 306 .

[0034] Through the above technical solution, the oil drain holes 306 are evenly distributed inside the oil drain groove 305, so that the oil discharge amount and oil discharge angle of the lubricating oil can be increased to avoid the situation where there are only a small number of oil drain holes 306 and no oil is discharged when the oil drain holes 306 are not perpendicular to the gravity line.

[0035] Specifically, a switch control mechanism 4 is installed on the right side of the sealing rod 301 . When the switch control mechanism 4 is pressed, it is displaced to open and close the oil drain hole 306 .

[0036] Through the above technical solution, the switch control mechanism 4 is provided to control the oil discharge timing of the oil drain hole 306 to reduce the loss of lubricating oil.

[0037] Specifically, a limiting groove 307 is provided on the back of the oil drain hole 306 on the inner wall of the oil storage chamber 303, a through hole 308 is provided on the right axis of the sealing rod 301, and the switch control mechanism 4 includes a connecting plate 401, the connecting plate 401 is located inside the oil storage chamber 303, and the diameter of the connecting plate 401 is the same as the inner diameter of the oil storage chamber 303, and the left side of the connecting plate 401 is fixedly connected with a sealing strip 402 with the same number and position as the oil drain holes 306, and the sealing strip 402 overlaps the inner wall of the oil storage chamber 303 and the oil drain holes 306 For sealing, an open port 403 is provided on the sealing strip 402, and the open port 403 is offset from the oil storage chamber 303. A traction rod 404 is fixedly connected to the right axis of the connecting plate 401, and the traction rod 404 passes through the through hole 308. An elastic sheet 405 is fixedly connected to the end of the traction rod 404, and both ends of the elastic sheet 405 are fixed to the right side of the sealing rod 301. The sealing strip 402 is located inside the limiting groove 307 to seal the oil drain hole 306, and the length of the sealing strip 402 is shorter than the length of the limiting groove 307.

[0038] Through the above technical solution, the purpose of setting the oil drain hole 306 is to limit the sealing strip 402, so as to improve the fit between the sealing strip 402 and the inner wall of the limiting groove 307. The traction rod 404 and the elastic sheet 405 are installed on the right side of the connecting plate 401. When the elastic sheet 405 is subjected to the pressure of the hydraulic oil, it will push the traction rod 404 to move the connecting plate 401 to the left, so that the sealing strip 402 is located at the capillary through hole on the opening 403 and the oil drain hole 306. The capillary through hole and the oil drain groove 305 are connected to discharge oil;

[0039] When the piston rod 2 contracts, the pressure of the hydraulic oil will also decrease. At this time, the elastic sheet 405 rebounds under the action of elasticity, thereby driving the sealing strip 402 to return to the initial position to seal the oil drain hole 306.

[0040] When in use, by pouring lubricating oil into the oil storage chamber 303, the lubricating oil in the oil storage chamber 303 will seep into the oil drain groove 305 through the oil drain hole 306 and be sealed and restricted by the inner wall of the hydraulic cylinder 1. When the piston rod 2 performs telescopic movement, the lubricating oil between the oil drain grooves 305 will be smeared on the inner wall of the hydraulic cylinder 1 through the movement of the sealing rod 301, thereby playing a lubricating role to avoid high temperature and damage due to friction, thereby achieving the effect of protecting the hydraulic cylinder 1 and the piston rod 2.

[0041] The connecting plate 401 is provided to drive the sealing strip 402, and a traction rod 404 and an elastic sheet 405 are installed on the right side of the connecting plate 401 to cooperate with each other. When the elastic sheet 405 is subjected to the pressure of the hydraulic oil, it will push the traction rod 404 to move the connecting plate 401 to the left, so that the sealing strip 402 is located at a position where the capillary through hole on the opening 403 and the oil drain hole 306 are misaligned, so that the capillary through hole and the oil drain groove 305 are connected to discharge oil, thereby avoiding waste of lubricating oil and achieving the effect of saving lubricating oil.

[0042] Although the 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 sealing assembly with a lubricating oil groove, comprising a sleeved hydraulic cylinder (1) and a piston rod (2), wherein the tail of the piston rod (2) is fixedly connected with a sealing assembly, and the sealing assembly seals the connection between the hydraulic cylinder (1) and the piston rod (2), characterized in that: The sealing assembly is a sealing mechanism (3), the sealing mechanism (3) comprising a sealing rod (301), the diameter of the sealing rod (301) being equal to the inner diameter of the hydraulic cylinder (1), the left axis of the sealing rod (301) being fixedly connected to a connector (302), an oil storage chamber (303) being provided inside the sealing rod (301) and the connector (302), an oil filling port (304) being provided at the end of the connector (302), the oil filling port (304) being connected to the oil storage chamber (303), the lubricating oil being filled into the oil storage chamber (303) through the oil filling port (304), and a sealing plug being provided on the oil filling port (304) to seal the oil filling port (304); An oil drain groove (305) is provided on the outer surface of the sealing rod (301), and an oil drain hole (306) is provided inside the oil drain groove (305).

2. A sealing assembly with a lubricating oil groove according to claim 1, characterized in that: The outer surface of the connecting head (302) is provided with an external thread, and the connecting head (302) is threadedly connected to the end of the piston rod (2) via the external thread.

3. A sealing assembly with a lubricating oil groove according to claim 1, characterized in that: The oil drain holes (306) are equidistantly distributed in a circumferential manner inside the oil drain groove (305), and capillary through holes are formed on the oil drain holes (306).

4. A sealing assembly with a lubricating oil groove according to claim 1, characterized in that: A switch control mechanism (4) is installed on the right side of the sealing rod (301). When the switch control mechanism (4) is pressurized, it moves to open and close the oil drain hole (306).

5. A sealing assembly with a lubricating oil groove according to claim 4, characterized in that: A limiting groove (307) is provided on the back side of the oil drain hole (306) on the inner wall of the oil storage cavity (303), and a through hole (308) is provided on the right axis of the sealing rod (301).

6. A sealing assembly with a lubricating oil groove according to claim 5, characterized in that: The switch control mechanism (4) comprises a connecting plate (401), the connecting plate (401) being located inside the oil storage cavity (303), and the diameter of the connecting plate (401) being the same as the inner diameter of the oil storage cavity (303), and the left side of the connecting plate (401) being fixedly connected with sealing strips (402) having the same number and position as the oil drain holes (306), the sealing strips (402) overlapping the inner wall of the oil storage cavity (303) to seal the oil drain holes (306). The sealing strip (402) is provided with an open opening (403), and the open opening (403) is arranged offset from the oil storage chamber (303). The right axis of the connecting plate (401) is fixedly connected to a traction rod (404), and the traction rod (404) passes through the through hole (308). The end of the traction rod (404) is fixedly connected to an elastic sheet (405), and the two ends of the elastic sheet (405) are fixed to the right side of the sealing rod (301).

7. A sealing assembly with a lubricating oil groove according to claim 6, characterized in that: The sealing strip (402) is located inside the limiting groove (307) to seal the oil drain hole (306), and the length of the sealing strip (402) is shorter than the length of the limiting groove (307).

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