CN211413180U

CN211413180U - Split type track hydraulic cylinder that goes up and down

Info

Publication number: CN211413180U
Application number: CN201922058323.7U
Authority: CN
Inventors: 祝翠荣; 何天庆; 柳庆坡; 崔光耀; 董广; 王金朝; 张学伟
Original assignee: Wisdri Engineering and Research Incorporation Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-09-04
Anticipated expiration: 2029-11-26

Abstract

The utility model belongs to the technical field of hydraulic cylinders, in particular to a split type track lifting hydraulic cylinder, which comprises a lower end cover, a cylinder body, a piston, a short piston rod and a guide rod; the bottom of the cylinder body is detachably connected with the lower end cover to form a sealed cavity structure; the piston is positioned in the cylinder body; the bottom end of the short piston rod is positioned in the cylinder body and forms a whole with the piston, and the top end of the short piston rod is positioned outside the cylinder body and is connected with the bottom end of the guide rod through threads; the top end of the guide rod is connected with the lifting track; and the bottom surface of the piston is provided with an opening for inserting a tool to drive the short piston rod to rotate. The utility model discloses be original piston rod split into short piston rod and guide bar, the accessible inserts the instrument and drives the rotatory threaded connection or the separation of short piston rod and guide bar in order to realize short piston rod and guide bar of short piston rod in the trompil on the piston, and easily assembly and disassembly, convenient maintenance have reduced the work load that the track lifting cylinder is sealed of changing, improve productivity.

Description

Split type track hydraulic cylinder that goes up and down

Technical Field

The utility model belongs to the technical field of the pneumatic cylinder, concretely relates to split type track hydraulic cylinder that goes up and down is applicable to the peaceful complete machine of six rolling mills.

Background

Because the roll diameters of the working rolls and the intermediate rolls of the six-roll mill and the finishing machine are changed, the roll bearing blocks need to be separated from the rails by a certain safety distance in a rolling state, and the roll changing rails of the working rolls and the intermediate rolls are generally made to be movable and can be driven by a hydraulic cylinder to lift. Usually, the upper middle roller track lifting cylinder can be arranged at the two ends of the track operation side and the transmission side by adopting a standard hydraulic cylinder; the upper work roll track lift cylinders are typically custom non-standard cylinders arranged in the roll bending block, taking into account the positional arrangement of the work roll drive.

The upper working roll track lifting cylinder arranged in the roll bending block has the advantages that when the hydraulic cylinder is damaged in sealing and leaks oil, the workload of replacing a sealing element is huge, the time consumption is long, and the normal production rhythm can be influenced. The reason for this is that: because the cylinder body of the track lifting cylinder is arranged below the roller bending block, but the piston rod is longer and is connected with the roller changing track of the upper working roller. When the device is disassembled, the space is not enough, the bending roll block needs to be disassembled firstly, and the piston rod of the hydraulic cylinder arranged in the bending roll block can be taken out, the hydraulic cylinder is checked, and corresponding repairing and sealing element replacing work is carried out. Meanwhile, at one end of the transmission side, due to the arrangement of a plurality of devices such as a middle roller shifting frame, a transmission connecting shaft and a machine top platform, personnel cannot conveniently stand when disassembling, lifting points are not easy to arrange, and the bending roller block and the hydraulic cylinder can be disassembled after the relevant devices are disassembled.

Disclosure of Invention

In order to overcome the deficiencies in the prior art, the utility model aims at providing a split type track hydraulic cylinder that goes up and down, easily assembly and disassembly, convenient maintenance have reduced the work load that the change track promotes the jar is sealed, improve productivity.

In order to achieve the purpose, the technical scheme of the utility model is a split type rail lifting hydraulic cylinder, which comprises a lower end cover, a cylinder body, a piston, a short piston rod and a guide rod; the bottom of the cylinder body is detachably connected with the lower end cover to form a sealed cavity structure; the piston is located within the cylinder; the bottom end of the short piston rod is positioned in the cylinder body and forms a whole with the piston, and the top end of the short piston rod is positioned outside the cylinder body and is connected with the bottom end of the guide rod through threads; the top end of the guide rod is connected with the lifting track; and the bottom surface of the piston is provided with an opening for inserting a tool to drive the short piston rod to rotate.

Further, the top end of the short piston rod is provided with a convex part, and the surface of the convex part is provided with an external thread; the bottom end of the guide rod is provided with a concave part, and an internal thread is arranged in the concave part; the top end of the short piston rod is connected with the bottom end of the guide rod through external threads and internal threads in a matched mode.

Furthermore, the bottom end of the convex part is provided with a guiding and positioning boss, and the bottom end of the concave part is provided with a guiding and positioning groove matched with the guiding and positioning boss.

Further, a lower guide sleeve is sleeved on the short piston rod, and the bottom of the lower guide sleeve is connected with the cylinder body; the connection part of the short piston rod and the guide rod is positioned above the lower guide sleeve.

Furthermore, an upper guide sleeve is sleeved on the guide rod, and the connection part of the short piston rod and the guide rod is positioned between the lower guide sleeve and the upper guide sleeve.

Further, the opening is a hexagon socket or a square hole.

Further, the top of guide bar is connected with the upper end cover, upper end cover and promotion track are connected.

Furthermore, the upper portion of lower part end cover is located in the cylinder body, the lower part is located outside the cylinder body, just the edge of lower part end cover lower part with the lateral wall of cylinder body passes through bolted connection, just the lower part end cover all opens the through-hole with the cylinder body, links lower part end cover and cylinder body with the bending block simultaneously through the bolt, and the screw thread setting is on the bending block.

Furthermore, the upper part of the lower end cover is provided with a first annular groove with an opening facing the inner wall of the cylinder body, and a first sealing element is installed in the first annular groove.

Further, the top of the cylinder body is provided with a second annular groove with an opening facing the short piston rod, and a second sealing element is installed in the second annular groove.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a reasonable equipment structural style, with the original whole root piston rod split of track hydraulic cylinder for short piston rod and guide bar two parts, the accessible inserts the instrument and drives the separation that the short piston rod of drive is rotatory in order to realize that the threaded connection of short piston rod and guide bar is in the same place or short piston rod and guide bar in the trompil on the piston bottom surface, easy assembly and disassembly, convenient maintenance, the work load that the track lifting cylinder is sealed is changed in the change track has been reduced, and the labor productivity is improved, the problem of inconvenient dismantlement when the original track hydraulic cylinder that arranges in the bending roll piece is sealed to be changed has been solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a split type rail hydraulic cylinder provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of a split type rail hydraulic cylinder provided in the embodiment of the present invention;

in the figure: 1. the device comprises an upper end cover, 2, an upper guide sleeve, 3, a guide rod, 4, external threads, 5, a guide positioning boss, 6, a short piston rod, 7, a cylinder body, 8, a lower guide sleeve, 9, a lower end cover, 10, a lifting track, 11, an upper middle roller, 12, an upper working roller, 13, a lower working roller, 14 and a lower middle roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1-2, an embodiment of the present invention provides a split rail lifting hydraulic cylinder, which includes a lower end cover 9, a cylinder body 7, a piston, a short piston rod 6 and a guide rod 3; the bottom of the cylinder body 7 is detachably connected with the lower end cover 9 to form a sealed cavity structure; the piston is positioned in the cylinder 7; the bottom end of the short piston rod 6 is positioned in the cylinder body 7 and forms a whole with the piston, and the top end of the short piston rod is positioned outside the cylinder body 7 and is connected with the bottom end of the guide rod 3 through threads; the top end of the guide rod 3 is connected with a lifting track 10; the bottom surface of the piston is provided with an opening for inserting a tool to drive the short piston rod 6 to rotate. The utility model discloses a reasonable equipment structural style, with the original whole root piston rod split of track hydraulic cylinder for short piston rod 6 and guide bar 3 two parts, the accessible inserts the instrument and drives the short piston rod 6 rotatory in order to realize the threaded connection of short piston rod 6 and guide bar 3 or the separation of short piston rod 6 and guide bar 3 together in the trompil on the piston bottom surface, easily assembly and disassembly, convenient maintenance, the work load that the track lifting cylinder is sealed is changed in the change has been reduced, and labor productivity is improved, the problem of inconvenient dismantlement when the original track hydraulic cylinder that arranges in the bending roll piece is sealed to be changed has been solved.

Further, the top end of the short piston rod 6 is provided with a convex part, and the surface of the convex part is provided with an external thread 4; the bottom end of the guide rod 3 is provided with a concave part, and an internal thread is arranged in the concave part; the top end of the short piston rod 6 is connected with the bottom end of the guide rod 3 through the external thread 4 and the internal thread matching, the short piston rod 6 is convenient to operate, the short piston rod 6 is screwed into the guide rod 3 to achieve organic connection of the short piston rod 6 and the guide rod 3, and the short piston rod 6 is also convenient to operate, the short piston rod 6 is screwed out of the guide rod 3 to achieve detachment of the short piston rod 6 and the guide rod 3. Furthermore, the bottom end of the convex part is provided with a guide positioning boss 5, the bottom end of the concave part is provided with a guide positioning groove matched with the guide positioning boss 5, the cross sections of the guide positioning boss 5 and the guide positioning groove are circular, the diameter of the guide positioning boss 5 is larger than that of the part of the convex part screwed into the guide rod 3, and the inner diameter of the guide positioning groove is larger than that of the part of the concave part used for accommodating the short piston rod 6, so that the screwing is controlled to be in place.

Further, a lower guide sleeve 8 is sleeved on the short piston rod 6, and the bottom of the lower guide sleeve 8 is connected with the cylinder body 7; the connection position of the short piston rod 6 and the guide rod 3 is positioned above the lower guide sleeve 8. Furthermore, the guide rod 3 is sleeved with an upper guide sleeve 2, and the connection position of the short piston rod 6 and the guide rod 3 is located between the lower guide sleeve 8 and the upper guide sleeve 2. The connection position of the short piston rod 6 and the guide rod 3 is determined according to the upper and lower available spaces, and is arranged above the lower guide sleeve 8 at the lowest part as much as possible, and the wiping contact between the joint surface of the short piston rod and the guide sleeve is avoided as much as possible.

Optimally, the trompil is hexagon socket or quad slit, and the instrument of being convenient for inserts, makes short piston rod 6 rotatory, realizes that short piston rod 6 and guide bar 3 rotatory twists or unpacks apart.

Further, the top of guide bar 3 is connected with upper portion end cover 1, upper portion end cover 1 adopts the round pin hub connection location with promoting track 10, firstly guarantees to promote track 10 along with track hydraulic cylinder lift synchronous motion, secondly when separating short piston rod 6 and guide bar 3, plays the effect that the guide bar 3 of location prevents rotatoryly, is convenient for tear out short piston rod 6.

Further, the upper part of the lower end cover 9 is positioned in the cylinder 7, the lower part is positioned outside the cylinder 7, and the edge of the lower part of the lower end cover 9 is connected with the side wall of the cylinder 7 through bolts; and the edge of the lower part of the lower end cover 9 and the side wall of the cylinder body 7 are provided with through holes, the lower end cover 9 and the cylinder body 7 are simultaneously connected with the roller bending block through bolts, and threads are arranged on the roller bending block so as to facilitate the disassembly of the lower end cover 9. Furthermore, the upper part of the lower end cover 9 is provided with a first annular groove with an opening facing the inner wall of the cylinder body 7, a first sealing element is installed in the first annular groove, and the upper part of the lower end cover 9 and the inner wall of the cylinder body 7 are sealed through the first sealing element.

Further, the top of the cylinder body 7 is provided with a second annular groove with an opening facing the short piston rod 6, a second sealing element is installed in the second annular groove, and the short piston rod 6 and the inner wall of the top of the cylinder body 7 are sealed through the second sealing element.

Adopt the utility model discloses a sealed process is changed to split type track hydraulic cylinder: firstly, the lower end cover 9 is detached, then an inner hexagonal wrench or other tools are inserted into the opening on the bottom surface of the short piston rod 6, the short piston rod 6 is screwed out from the guide rod 3 through rotation, then the short piston rod 6 and the cylinder body 7 are detached together, the hydraulic cylinder is checked and repaired, the sealing element is replaced, and the like, and the short piston rod is reassembled. The method has the advantages that the required dismounting space is small, the replacement of the sealing element can be realized without dismounting other equipment, the workload is greatly saved, and the working efficiency is improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a split type track hydraulic cylinder that goes up and down which characterized in that: comprises a lower end cover, a cylinder body, a piston, a short piston rod and a guide rod; the bottom of the cylinder body is detachably connected with the lower end cover to form a sealed cavity structure; the piston is located within the cylinder; the bottom end of the short piston rod is positioned in the cylinder body and forms a whole with the piston, and the top end of the short piston rod is positioned outside the cylinder body and is connected with the bottom end of the guide rod through threads; the top end of the guide rod is connected with the lifting track; and the bottom surface of the piston is provided with an opening for inserting a tool to drive the short piston rod to rotate.

2. A split rail lift cylinder as defined in claim 1 wherein: the top end of the short piston rod is provided with a convex part, and the surface of the convex part is provided with an external thread; the bottom end of the guide rod is provided with a concave part, and an internal thread is arranged in the concave part; the top end of the short piston rod is connected with the bottom end of the guide rod through external threads and internal threads in a matched mode.

3. A split rail lift cylinder as defined in claim 2 wherein: the bottom of convex part is equipped with the direction location boss, the bottom of concave part be equipped with direction location boss matched with direction location recess.

4. A split rail lift cylinder as defined in claim 1 wherein: a lower guide sleeve is sleeved on the short piston rod, and the bottom of the lower guide sleeve is connected with the cylinder body; the connection part of the short piston rod and the guide rod is positioned above the lower guide sleeve.

5. The split rail lift cylinder of claim 4, wherein: an upper guide sleeve is sleeved on the guide rod, and the connection part of the short piston rod and the guide rod is positioned between the lower guide sleeve and the upper guide sleeve.

6. A split rail lift cylinder as defined in claim 1 wherein: the open pore is hexagon socket hole or quad slit.

7. A split rail lift cylinder as defined in claim 1 wherein: the top of guide bar is connected with the upper end cover, upper end cover and promotion track are connected.

8. A split rail lift cylinder as defined in claim 1 wherein: the upper portion of lower part end cover is located in the cylinder body, the lower part is located outside the cylinder body, just the edge of lower part end cover lower part with the lateral wall of cylinder body passes through bolted connection, just the lower part end cover all opens the through-hole with the cylinder body, links lower part end cover and cylinder body with the bending block simultaneously through the bolt, and the screw thread setting is on the bending block.

9. A split rail lift cylinder as defined in claim 8 wherein: the upper portion of the lower end cover is provided with a first annular groove with an opening facing the inner wall of the cylinder body, and a first sealing element is installed in the first annular groove.

10. A split rail lift cylinder as defined in claim 1 wherein: the top of cylinder body is equipped with the opening and faces the second annular groove of short piston rod, install the second sealing member in the second annular groove.