CN211082438U

CN211082438U - Hydraulic oil cylinder

Info

Publication number: CN211082438U
Application number: CN201920284033.1U
Authority: CN
Inventors: 张晓琴; 李新涛; 堵林峰
Original assignee: Changzhou Qiaotelai Heavy Hydraulic Cylinders Co ltd
Current assignee: Changzhou Qiaotelai Heavy Hydraulic Cylinders Co ltd
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2020-07-24
Anticipated expiration: 2029-03-06

Abstract

The utility model relates to a hydraulic cylinder has cylinder body, cylinder bottom, cylinder cap, piston rod, sliding sleeve, and the cylinder body is equipped with the cermet coating, and the cylinder bottom extends there is the bulge, is connected with discharge valve, is equipped with steckel and Y type circle between piston and the cermet coating, and Y type circle symmetry is located steckel's both sides, terminal surface are connected with fastening screw and cushion washer about the piston, are equipped with O type circle between sliding sleeve and the cylinder body, are equipped with the glede circle between sliding sleeve and the piston rod, are equipped with the dust ring between cylinder cap and the piston rod. The utility model discloses it is sealed effectual to set up steckel, Y type circle, glade circle, O type circle etc. is applicable to long-time high pressure function, establishes discharge valve and promotes hydraulic cylinder's job stabilization nature, reduces the use that inside vibrations influence the internals, sets up the rigid impact that the buffering packing ring can prevent the hydro-cylinder and to cause the damage to cylinder body inside, sets up the cermet coating, reduces the wearing and tearing of cylinder body inner wall, increase of service life.

Description

Hydraulic oil cylinder

Technical Field

The utility model relates to a hydro-cylinder technical field especially relates to a hydraulic cylinder.

Background

The hydraulic oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion. The reciprocating motion device has simple structure and reliable work, can avoid a speed reducer when the reciprocating motion is realized, has no transmission clearance, and moves stably, thereby being widely applied to hydraulic systems of various machines. In some hydraulic processing machines, hydraulic rams are the primary actuators, and the reliability of their operation and their useful life are critically dependent on the quality of the sealing system. Traditional hydraulic cylinder leakproofness is relatively poor, is not suitable for and uses under the high pressure, uses moreover for a long time afterwards, along with sealed effect's reduction and pressure, the cylinder body is inside can receive the wearing and tearing of different degrees, and whole hydraulic cylinder's life is not long, and maintenance cycle is short.

Disclosure of Invention

The utility model aims at overcoming prior art's defect, providing one kind and being applicable to and using under high-speed high pressure, sealing performance is good, inner structure is stable, long service life's hydraulic cylinder.

Realize the utility model discloses the technical scheme of purpose is: a hydraulic cylinder is provided with a cylinder body, a cylinder bottom, a cylinder cover, a piston rod and a sliding sleeve, wherein the cylinder bottom and the cylinder cover are respectively connected to the left end and the right end of the cylinder body; the inner wall of the cylinder body is provided with a metal ceramic coating, a protruding part extends from the bottom of the cylinder to one side of the piston, the diameter of the outer surface of the protruding part is the same as that of the inner wall of the cylinder body, a first groove is formed in the middle of the protruding part in the direction opposite to the piston, an exhaust valve is connected to the bottom of the cylinder, a Stent seal and a Y-shaped ring are arranged between the piston and the metal ceramic coating, the Y-shaped ring is symmetrically arranged on two sides of the Stent seal, the left end face of the piston is connected with a first fastening screw and a first buffer gasket which have the same diameter of the outer surface, the right end face of the piston is connected with a second fastening screw and a second buffer gasket which have the same diameter of the outer surface, an O-shaped ring is arranged between the sliding sleeve and the cylinder body, a Glare ring is arranged between the sliding sleeve and the piston rod, a second groove is arranged on the left side of the sliding, the diameter of the second groove is the same as the diameter of the outer surface of the second fastening screw and the diameter of the outer surface of the second buffer gasket, and a dustproof ring is arranged between the cylinder cover and the piston rod.

In the above technical solution, the diameter ratio of the first groove to the second groove is 5: 7.

the metal ceramic coating in the technical scheme is a chromium oxide ceramic coating, and the thickness of the chromium oxide ceramic coating is 0.2-0.25 mm.

According to the technical scheme, the transverse length of the first groove is larger than the sum of the transverse lengths of the first fastening screw and the first buffer washer.

According to the technical scheme, the transverse length of the second groove is larger than the sum of the transverse lengths of the second fastening screw and the second buffer washer.

According to the technical scheme, the cylinder bottom and the cylinder cover are made of No. 35 steel, and the cylinder body, the piston and the piston rod are made of No. 45 steel.

According to the technical scheme, the cylinder bottom is connected with a first oil port, and the opening direction of the first oil port is opposite to that of the exhaust valve.

According to the technical scheme, the sliding sleeve is connected with the second oil port.

After the technical scheme is adopted, the utility model discloses following positive effect has: the utility model discloses it is sealed effectual to set up steckel, Y type circle, glade circle, O type circle etc. is applicable to long-time high pressure function, establishes discharge valve and promotes hydraulic cylinder's job stabilization nature, reduces the use that inside vibrations influence the internals, sets up the rigid impact that the buffering packing ring can prevent the hydro-cylinder and to cause the damage to cylinder body inside, sets up the cermet coating, reduces the wearing and tearing of cylinder body inner wall, increase of service life.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the utility model has a cylinder body 1, a cylinder bottom 2, a cylinder cover 3, a piston 4, a piston rod 5 and a sliding sleeve 6, wherein the cylinder bottom 2 and the cylinder cover 3 are respectively connected to the left and right ends of the cylinder body 1, the sliding sleeve is connected between the cylinder cover and the cylinder body, the piston 4 is connected to one end of the piston rod 5 and is slidably connected to the inner wall of the cylinder body 1, and the other end of the piston rod 5 is slidably connected to the sliding sleeve 6 and extends out of the cylinder cover 3; the inner wall of the cylinder body 1 is provided with a metal ceramic coating 11, one surface of the cylinder bottom 2 facing the piston 4 extends to form a protruding part 21, the diameter of the outer surface of the protruding part 21 is the same as that of the inner wall of the cylinder body 1, the middle of the protruding part 21 is provided with a first groove 21 facing away from the piston, the cylinder bottom 2 is connected with an exhaust valve 23, a Stent seal 41 and Y-shaped rings 42 are arranged between the piston 4 and the metal ceramic coating 11, the Y-shaped rings 42 are symmetrically arranged at two sides of the Stent seal 41, the left end surface of the piston 4 is connected with a first fastening screw 43 and a first buffer washer 44 which have the same diameter of the outer surface, the right end surface of the piston 4 is connected with a second fastening screw 45 and a second buffer washer 46 which have the same diameter of the outer surface, an O-shaped ring 61 is arranged between the sliding sleeve 6 and the cylinder body 1, and a Glare ring, the left side of sliding sleeve 6 is equipped with second recess 63, the diameter of first recess 21 with the surface diameter of first fastening screw 43 and first cushion ring 44 is the same, the diameter of second recess 63 with the surface diameter of second fastening screw 45 and second cushion ring 46 is the same, cylinder cap 3 with be equipped with dust ring 31 between the piston rod 5.

This technical scheme does the utility model discloses a core technical scheme has cylinder body 1, cylinder bottom 2, cylinder cap 3, piston 4, piston rod 5, sliding sleeve 6, cylinder bottom 2 and cylinder cap 3 connect respectively in both ends about cylinder body 1, cylinder bottom 2 connect in the left end of cylinder body 1. The cylinder cover 3 connect with the right of cylinder body 1, the cylinder cover with be connected with the sliding sleeve between the cylinder body, the surface diameter of sliding sleeve with the surface diameter of cylinder cover is the same. The shaft center of the piston 4 is fixedly connected with one end of the left side of the piston rod 5 and is slidingly and internally connected with the inner wall of the cylinder body 1, and one end of the right side of the piston rod 5 is slidingly connected with the shaft center of the sliding sleeve 6 and extends out of the shaft center of the cylinder cover 3 rightwards; the inner wall of the cylinder body 1 is provided with a metal ceramic coating 11, the metal ceramic coating 11 on the inner wall of the cylinder body 1 plays roles of abrasion resistance and corrosion resistance, friction and abrasion between the piston 4 and the inner wall of the cylinder body 1 can be effectively prevented, the metal ceramic coating 11 can be selected from aluminum oxide, zirconium oxide, chromium oxide and composite ceramic coatings, and the metal ceramic coating 11 can be selected from metal ceramic coatings sold in the market for thermal spraying. One side of the cylinder bottom 2 facing the piston 4 extends to form a protruding portion 21, the diameter of the outer surface of the protruding portion 21 is the same as that of the inner wall of the cylinder body 1, the protruding portion 21 is convenient to be in interference fit with the inside of the cylinder body 1, and a first groove 21 is formed in the middle of the protruding portion 21 in the direction back to the piston. The cylinder bottom 2 is connected with an exhaust valve 23, because if air remains in the cylinder body 1, the air has compressibility and hysteresis expansibility, which can cause flutter and crawling of the hydraulic cylinder and the whole hydraulic system during working, and can cause damage to the inside of the cylinder body 1 in severe cases, and the exhaust valve 23 can improve the stability of the hydraulic system. A Stent seal 41 and a Y-shaped ring 42 are arranged between the piston 4 and the metal ceramic coating 11, and the Stent seal 41 has low friction resistance and no creeping phenomenon; the dynamic and static sealing effects are quite good; no viscosity phenomenon; the performance is good when the lubricant is lubricated or not lubricated; the groove structure is simple; high pressure resistance and strong working condition adaptability; the Y-ring 42 is made of teflon. The Y-rings 42 are symmetrically disposed on both sides of the steckel seal 41 to provide sufficient sealing effect on both sides of the piston. The left end face of the piston 4 is connected with a first fastening screw 43 and a first buffer washer 44 which have the same outer surface diameter, the right end face of the piston 4 is connected with a second fastening screw 45 and a second buffer washer 46 which have the same outer surface diameter, an O-shaped ring 61 is arranged between the sliding sleeve 6 and the cylinder body 1, and the O-shaped ring 61 is made of fluororubber. The GREEN ring 62 is arranged between the sliding sleeve 6 and the piston rod 5, and the GREEN ring 62 is low in friction force, free of creeping, small in starting force and resistant to high pressure. The left side of the sliding sleeve 6 is provided with a second groove 63, the diameter of the first groove 21 is the same as the diameter of the outer surfaces of the first fastening screw 43 and the first buffer washer 44, and the diameter of the second groove 63 is the same as the diameter of the outer surfaces of the second fastening screw 45 and the second buffer washer 46. A dustproof ring 31 is arranged between the cylinder cover 3 and the piston rod 5, so that dust and the like in the air are prevented from entering the cylinder body 1 to influence the service life of the hydraulic oil cylinder.

Further, the diameter ratio of the first groove 21 to the second groove 63 is 5: 7.

furthermore, the metal ceramic coating 11 is a chromium oxide ceramic coating, the thickness of the chromium oxide ceramic coating is 0.2-0.25mm, the stability of the chromium oxide ceramic coating is high, the spraying process performance is good, and the surface roughness is small.

The first groove 21 has a lateral length greater than the sum of the lateral lengths of the first fastening screw 43 and the first cushion washer 44, providing a sufficient cushion space.

The second groove 63 has a lateral length greater than the sum of the lateral lengths of the second fastening screw 45 and the second cushion washer 46, providing a sufficient cushion space.

The cylinder bottom 2 and the cylinder cover 3 are made of No. 35 steel, the cylinder body 1, the piston 4 and the piston rod 5 are made of No. 45 steel, and the No. 35 steel and the No. 45 steel are common hydraulic cylinder manufacturing materials.

The cylinder bottom 2 is connected with a first oil port 24, the opening direction of the first oil port 24 is opposite to that of the exhaust valve 23, the air density is low, the exhaust valve 23 is arranged upwards, and the first oil port 24 is arranged downwards.

The sliding sleeve 6 is connected with a second oil port 64, and the second oil port 64 is arranged upwards.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A hydraulic cylinder is provided with a cylinder body (1), a cylinder bottom (2), a cylinder cover (3), a piston (4), a piston rod (5) and a sliding sleeve (6), wherein the cylinder bottom (2) and the cylinder cover (3) are respectively connected to the left end and the right end of the cylinder body (1), the sliding sleeve (6) is connected between the cylinder cover (3) and the cylinder body (1), the piston (4) is connected to one end of the piston rod (5) and is slidably and internally connected to the inner wall of the cylinder body (1), and the other end of the piston rod (5) is slidably connected to the sliding sleeve (6) and extends out of the cylinder cover (3); the method is characterized in that: the inner wall of cylinder body (1) is equipped with cermet coating (11), cylinder bottom (2) have protrusion (21) towards the one side extension of piston (4), the surface diameter of protrusion (21) with the inner wall diameter of cylinder body (1) is the same, the middle of protrusion (21) is equipped with first recess (22) to the direction of piston dorsad, cylinder bottom (2) are connected with discharge valve (23), piston (4) with be equipped with steckel seal (41) and Y type circle (42) between cermet coating (11), Y type circle (42) symmetry is located the both sides of steckel seal (41), the left end face of piston (4) is connected with first fastening screw (43) and first cushion ring (44) that surface diameter is the same, the right-hand member face of piston (4) is connected with second fastening screw (45) and second cushion ring (46) that surface diameter is the same, sliding sleeve (6) with be equipped with O type circle (61) between cylinder body (1), sliding sleeve (6) with be equipped with gley circle (62) between piston rod (5), the left side of sliding sleeve (6) is equipped with second recess (63), the diameter of first recess (22) with the surface diameter of first fastening screw (43) and first cushion ring (44) is the same, the diameter of second recess (63) with the surface diameter of second fastening screw (45) and second cushion ring (46) is the same, cylinder cap (3) with be equipped with dust ring (31) between piston rod (5).

2. A hydraulic cylinder as claimed in claim 1, characterized by: the diameter ratio of the first groove (22) to the second groove (63) is 5: 7.

3. a hydraulic cylinder as claimed in claim 1, characterized by: the metal ceramic coating (11) is a chromium oxide ceramic coating, and the thickness of the chromium oxide ceramic coating is 0.2-0.25 mm.

4. A hydraulic cylinder as claimed in claim 1, characterized by: the first groove (22) has a lateral length greater than the sum of the lateral lengths of the first fastening screw (43) and the first cushion washer (44).

5. A hydraulic cylinder as claimed in claim 1, characterized by: the second groove (63) has a lateral length greater than the sum of the lateral lengths of the second fastening screw (45) and the second cushion washer (46).

6. A hydraulic cylinder as claimed in claim 1, characterized by: the cylinder bottom (2) and the cylinder cover (3) are made of No. 35 steel, and the cylinder body (1), the piston (4) and the piston rod (5) are made of No. 45 steel.

7. A hydraulic cylinder as claimed in claim 1, characterized by: the cylinder bottom (2) is connected with a first oil port (24), and the opening directions of the first oil port (24) and the exhaust valve (23) are opposite.

8. A hydraulic cylinder as claimed in claim 1, characterized by: the sliding sleeve (6) is connected with a second oil port (64).