Hydraulic cylinder and edger press device

Abstract

The utility model relates to oil cylinder technical field provides a hydraulic cylinder and vertical roll rolling mill side pressure device, including cylinder body, with first side and second side who set up opposite along self axial direction, the part of cylinder body is close to first side is used for with frame to set up connection, piston, piston's first end is movably arranged in cylinder body, piston's second end stretches out cylinder body's first side, connecting ring, the sleeve and is fixed on the outer peripheral wall of cylinder body close to first side, connecting ring has the connecting hole who sets up through, the axis of connecting hole is parallel with the axis of cylinder body, and cylinder body is fixedly connected with frame through connecting hole. Through the technical scheme provided by the utility model, the stroke of the piston is improved while the installation efficiency of the cylinder and the frame is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and more specifically, to a hydraulic cylinder and a side pressing device for a vertical roll mill. Background Technology

[0002] AWC (Automatic Width Control) hydraulic cylinders are the main actuators of the side pressing device in vertical rolling mills, and their installation stability directly affects the width quality of the product. Currently, most AWC hydraulic cylinders adopt an external mounting scheme, meaning the cylinder barrel is bolted to the frame.

[0003] However, existing cylinders do not adopt a standard cylindrical design with a regular structure, but instead present an irregular outline. In order to meet the control requirements of oil inlet and outlet, an oil port needs to be pre-set in the middle of the cylinder body. This oil port structure further increases the complexity of the cylinder structure, thereby increasing the difficulty of assembling the cylinder and the frame and prolonging the assembly time. At the same time, due to the position of the oil port, the cylinder and the frame are assembled in the middle of the cylinder, while the piston extension direction is consistent with the cylinder axis direction. This will cause the piston to not extend fully, thereby compressing the effective range of piston movement, and sometimes failing to meet the usage requirements of the device. Utility Model Content

[0004] The problem this invention solves is how to increase the piston stroke while improving the installation efficiency of the cylinder and frame.

[0005] To solve the above problems, this utility model provides a hydraulic cylinder and a side pressing device for a vertical roll mill.

[0006] In a first aspect, this utility model provides a hydraulic cylinder, comprising: a cylinder body having a first side and a second side arranged opposite to each other along its own axial direction, the portion of the cylinder body near the first side being used for through-connection to a frame; a piston, the first end of the piston being movably disposed within the cylinder body, the second end of the piston extending out of the first side of the cylinder body and being drivenly connected to an external component; and a connecting ring, sleeved and fixed on the outer peripheral wall of the cylinder body near the first side, the connecting ring having a through-hole, the axis of the connecting hole being parallel to the axis of the cylinder body, the cylinder body being fixedly connected to the frame through the connecting hole.

[0007] The beneficial effects of this hydraulic cylinder are: By setting the above structure, a closed chamber for the reciprocating motion of the piston is formed inside the cylinder, providing space for the conversion of hydraulic energy into mechanical energy. The first end of the piston moves axially within the cylinder, completing the hydraulic cycle of oil suction and pressure through cooperation with the cylinder chamber. The second end extends to the first side of the cylinder, corresponding precisely to the end of the cylinder that passes through the frame. At the same time, the connecting ring is sleeved and fixed on the outer peripheral wall of the cylinder near the first side, transforming the direct connection between the cylinder and the frame into an indirect connection between the cylinder and the frame through the connecting ring. This not only solves the problem of direct connection between the cylinder and the frame due to the difficulty of the cylinder's own structure, but also enables accuracy during the installation process through the connecting hole, thereby improving the installation efficiency of the cylinder and the frame.

[0008] Meanwhile, the connecting ring is positioned close to the first side of the cylinder body, and the second end of the piston extends to the first side of the cylinder body. This allows the second end of the piston to move fully outside the cylinder body, while making the best use of the axial length of the cylinder body, thereby significantly increasing the effective stroke of the piston and enhancing the adjustment range of the hydraulic cylinder.

[0009] Optionally, the connecting ring is provided with a first keyway on the side near the outer peripheral wall of the cylinder body, and a second keyway corresponding to the first keyway is provided on the outer peripheral wall of the cylinder body. The first keyway and the second keyway extend along the axial direction of the cylinder body and together form a first groove. The hydraulic cylinder also includes a first limiting key, which is disposed in the first groove to limit the rotation of the connecting ring relative to the cylinder body.

[0010] Optionally, the connecting ring includes a first ring body and a second ring body that are symmetrically arranged and detachably connected. The first ring body and the second ring body are arc-shaped structures, and the first ring body and / or the second ring body are provided with the first keyway.

[0011] Optionally, there are multiple first keyways and multiple second keyways, and the multiple first keyways and multiple second keyways are arranged at intervals along the circumference of the connecting ring, and the first keyways and the second keyways are configured in a one-to-one correspondence.

[0012] Optionally, the connecting ring is provided with a plurality of connecting holes, which are evenly spaced along the circumferential direction of the connecting ring.

[0013] Optionally, the hydraulic cylinder further includes: a cylinder head, fixedly connected to the second end of the piston; a connecting member, sleeved and fixed to the outer peripheral wall of the cylinder head; and a guide rod, one end of which is connected to the connecting member and the other end of which is connected to the frame, the guide rod being used to guide the movement of the cylinder head.

[0014] Optionally, two guide rods are provided, and the two guide rods are arranged symmetrically along the radial direction of the cylinder head.

[0015] Optionally, the connector includes a first connecting structure and a second connecting structure that are detachably connected, wherein the first connecting structure is arc-shaped and the second connecting structure is used to connect with the guide rod.

[0016] Optionally, the connector is provided with a third keyway on the side of the outer peripheral wall of the cylinder head, and a fourth keyway corresponding to the third keyway is provided on the outer peripheral wall of the cylinder head. The third keyway and the fourth keyway extend along the axial direction of the cylinder body and together form a second groove. The hydraulic cylinder also includes a second limiting key, which is disposed in the second groove to limit the rotation of the connector relative to the cylinder head.

[0017] Secondly, this utility model provides a side pressing device for a vertical roll mill, including the aforementioned hydraulic cylinder.

[0018] The advantages of the vertical roll mill side pressing device in this embodiment compared to the prior art are the same as those of the hydraulic cylinder described above, and will not be repeated here. Attached Figure Description

[0019] Figure 1 A cross-sectional schematic diagram of a hydraulic cylinder provided for an embodiment of this utility model; Figure 2 A schematic diagram of the structure of the hydraulic cylinder provided in the embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures: Cylinder block 10, first side 11, second side 12 Rack 20 Piston 30 Connecting ring 40, connecting hole 41, first ring body 42, second ring body 43, First limit key 50 Cylinder head 60 Connector 70, first connecting structure 71, second connecting structure 72 Guide rod 80 Second limit key 90 Axial direction X, radial direction Y. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0022] In the accompanying drawings, the X-axis represents the axial direction; the Y-axis represents the radial direction. It should be noted that the aforementioned representations of the X and Y axes are merely for ease of description and simplification of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0023] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0024] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0025] like Figure 1 and Figure 2 As shown, in a first aspect, the present invention provides a hydraulic cylinder, comprising: a cylinder body 10 having a first side 11 and a second side 12 arranged opposite to each other along its own axial direction, the portion of the cylinder body 10 near the first side 11 being used for through connection with a frame 20; a piston 30, the first end of the piston 30 being movably disposed within the cylinder body 10, the second end of the piston 30 extending out of the first side 11 of the cylinder body 10 and being drivenly connected to an external component; and a connecting ring 40, sleeved and fixed on the outer peripheral wall of the cylinder body 10 near the first side 11, the connecting ring 40 having a through connecting hole 41, the axis of the connecting hole 41 being parallel to the axis of the cylinder body 10, and the cylinder body 10 being fixedly connected to the frame 20 through the connecting hole 41.

[0026] In this embodiment, by setting the above structure, a closed chamber for the reciprocating motion of the piston 30 is formed inside the cylinder 10, providing space for the conversion of hydraulic energy into mechanical energy. The first end of the piston 30 moves axially within the cylinder 10, completing the hydraulic cycle of oil suction and pressure through cooperation with the chamber of the cylinder 10. The second end extends to the first side 11 of the cylinder 10, which corresponds exactly to the end of the cylinder 10 that passes through the frame 20. At the same time, the connecting ring 40 is sleeved and fixed on the outer peripheral wall of the cylinder 10 near the first side 11, transforming the direct connection between the cylinder 10 and the frame 20 into an indirect connection between the cylinder 10 and the frame 20 through the connecting ring 40. This not only solves the problem that the cylinder 10 is difficult to directly connect to the frame 20 due to its own structure, but also enables accuracy during the installation process through the connecting hole 41, thereby improving the installation efficiency of the cylinder and the frame 20.

[0027] Meanwhile, the connecting ring 40 is positioned close to the first side 11 of the cylinder body 10, and the second end of the piston 30 extends to the first side 11 of the cylinder body 10. The connection position between the frame 20 and the cylinder body 10 is close to the first side 11 of the cylinder body 10, so that the first side of the cylinder body 10 has sufficient space for the piston 30 to extend and retract. This allows the second end of the piston 30 to move fully outside the cylinder body 10, while making full use of the axial length of the cylinder body 10, thereby significantly increasing the effective stroke of the piston 30 and enhancing the adjustment range of the hydraulic cylinder.

[0028] Optionally, the connecting ring 40 is provided with a first keyway on the side near the outer peripheral wall of the cylinder body 10, and a second keyway corresponding to the first keyway is provided on the outer peripheral wall of the cylinder body 10. The first keyway and the second keyway extend along the axial direction of the cylinder body 10 and together form a first groove. The hydraulic cylinder also includes a first limiting key 50, which is disposed in the first groove to limit the rotation of the connecting ring 40 relative to the cylinder body 10.

[0029] By setting the above structure, the first keyway and the second keyway extend axially and together form the first groove, providing installation space for the first limiting key 50. When the first limiting key 50 is embedded in the first groove, it forms a circumferential limit through its cooperation with the groove, thereby limiting the rotational displacement of the connecting ring 40 to ensure the stability of the connection between the two.

[0030] Meanwhile, the mating structure of the keyway and the limit key is not easily damaged by long-term vibration or load. When the limit key is worn, it can be disassembled and replaced separately without disassembling the cylinder 10 or the connecting ring 40. This makes the maintenance process simple and convenient, and greatly reduces the time and economic cost of equipment operation and maintenance.

[0031] Optionally, the connecting ring 40 includes a first ring body 42 and a second ring body 43 that are symmetrically arranged and detachably connected. The first ring body 42 and the second ring body 43 have an arc-shaped structure, and the first ring body 42 and / or the second ring body 43 are provided with a first keyway.

[0032] By setting the above structure, since the cylinder body 10 needs to be connected to the frame 20, and other structures may be integrated on the outer peripheral wall near the first side 11, the integrated connecting ring 40 needs to be sleeved along the axial direction of the cylinder body 10. This is easily affected by the length of the cylinder body 10 or the structure of the frame 20, making the assembly extremely difficult. However, the split first ring 42 and second ring 43 can be directly fastened from the radial sides of the cylinder body 10 without axial insertion. Even if the cylinder body 10 has partially penetrated the frame 20 or has a protruding structure on the outer periphery, it can still be quickly sleeved and fixed. This significantly reduces the assembly difficulty of the connecting ring 40 and the cylinder body 10, thereby shortening the assembly time.

[0033] Furthermore, the machining difficulty of the arc-shaped parts is relatively low, which not only reduces the machining difficulty of the parts, but also reduces the production cost. In addition, when the connecting ring 40 is worn, the damaged first ring 42 or second ring 43 can be replaced individually simply by loosening the connecting fasteners of the first ring body 42 and the second ring body 43, which greatly reduces the replacement cost.

[0034] Optionally, there are multiple first keyways and multiple second keyways, and the multiple first keyways and multiple second keyways are arranged at intervals along the circumference of the connecting ring 40, and the first keyways and the second keyways are set in a one-to-one correspondence.

[0035] By setting the above structure, multiple sets of keyways and limiting keys arranged circumferentially form multiple limiting structures, which can better disperse the circumferential torque generated when the hydraulic cylinder is working. During the operation of the device, the impact of the reciprocating motion of the piston 30 can easily cause the connecting ring 40 and the cylinder body 10 to rotate relative to each other. The multiple sets of limiting keys, by embedding themselves in their corresponding slots, distribute the torque to multiple stress points, preventing the first keyway and the second keyway from deforming or wearing due to concentrated loads, thereby improving the reliability of the circumferential constraint between the connecting ring 40 and the cylinder body 10.

[0036] Optionally, the connecting ring 40 is provided with a plurality of connecting holes 41, which are evenly spaced along the circumference of the connecting ring 40.

[0037] In this embodiment, the connecting hole 41 is used for fastening bolts to pass through and connect, so as to fix the connecting ring 40 to the frame 20.

[0038] By setting up the above structure, multiple connecting holes 41 are evenly arranged circumferentially, allowing the fastening bolts between the connecting ring 40 and the frame 20 to be spaced apart circumferentially along the cylinder body 10. This design avoids deformation or breakage of local bolts due to overload, thereby reducing stress concentration at the connection point. At the same time, the evenly distributed bolts can disperse the force transmitted by the cylinder body 10 to the frame 20, reducing the risk of local wear or deformation of the frame 20 and significantly improving the structural strength of the connection between the cylinder body 10 and the frame 20.

[0039] Optionally, the hydraulic cylinder further includes: a cylinder head 60, which is fixedly connected to the second end of the piston 30; a connecting member 70, which is sleeved and fixed on the outer peripheral wall of the cylinder head 60; and a guide rod 80, one end of which is connected to the connecting member 70 and the other end of which is connected to the frame 20. The guide rod 80 is used to guide the movement of the cylinder head 60.

[0040] By setting the above structure, the guide rod 80 and the frame 20 form a constraint, so that the cylinder head 60 moves linearly along the axis of the guide rod 80. At the same time, since the cylinder head 60 is fixedly connected to the second end of the piston 30, this guiding effect can be directly transmitted to the piston 30, ensuring that the piston 30 always reciprocates precisely along the axis within the cylinder body 10, avoiding the piston 30 from deviating, thereby improving the movement accuracy of the piston 30.

[0041] Optionally, two guide rods 80 are provided, and the two guide rods 80 are arranged symmetrically along the radial direction of the cylinder head 60.

[0042] By setting the above structure, the symmetrical arrangement of the double guide rods 80 can simultaneously apply constraints from both radial sides of the cylinder head 60. When the hydraulic cylinder is working, the piston 30 drives the cylinder head 60 to reciprocate. The guide rod 80 set on one side is prone to tilting of the cylinder head 60 due to uneven force, which in turn causes friction and jamming between the piston 30 and the inner wall of the cylinder body 10. The two symmetrically arranged guide rods 80 can force the cylinder head 60 to always move along the axial centerline, controlling the radial offset of the piston 30 to a very small range, so as to further ensure the straightness of the piston 30's movement.

[0043] In other embodiments, the number of guide rods 80 is not limited, as long as it can meet the guiding requirements of the device.

[0044] Optionally, the connector 70 includes a first connecting structure 71 and a second connecting structure 72 that are detachably connected. The first connecting structure 71 is arc-shaped, and the second connecting structure 72 is used to connect with the guide rod 80.

[0045] By setting the above structure, the first connecting structure 71 adopts an arc-shaped and detachable design, which can be directly fastened and fixed from both radial sides of the cylinder head 60 without the need to be sleeved along the axial direction of the cylinder head 60. This not only greatly reduces the assembly difficulty of the connecting part 70 and the cylinder head 60, but also reduces the production cost of the parts.

[0046] Optionally, the connecting member 70 is provided with a third keyway on the side near the outer peripheral wall of the cylinder head 60, and a fourth keyway corresponding to the third keyway is provided on the outer peripheral wall of the cylinder head 60. The third keyway and the fourth keyway extend along the axial direction of the cylinder body 10 and together form a second groove. The hydraulic cylinder also includes a second limiting key 90, which is provided in the second groove to limit the rotation of the connecting ring 40 relative to the cylinder head 60.

[0047] By setting the above structure, the connector 70 needs to reciprocate synchronously with the cylinder head 60 and the piston 30. If the connector 70 rotates relative to the cylinder head 60, it will cause the guide rod 80 to deviate from the preset guide direction, thereby damaging the guide accuracy and even causing friction jamming between the guide rod 80 and the through hole of the frame 20. The third keyway and the fourth keyway extend axially to form a second groove. After the second limit key 90 is embedded in it, it forms a circumferential limit, thereby restricting the rotation of the connector 70 relative to the cylinder head 60. This can ensure the straightness and stability of the piston 30 movement.

[0048] Secondly, this utility model provides a side pressing device for a vertical roll mill, including the aforementioned hydraulic cylinder.

[0049] The advantages of the vertical roll mill side pressing device in this embodiment compared to the prior art are the same as those of the hydraulic cylinder described above, and will not be repeated here.

[0050] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A hydraulic cylinder, characterized in that, include: The cylinder (10) has a first side (11) and a second side (12) arranged opposite to each other along its own axis, and the portion of the cylinder (10) near the first side (11) is used for through connection with the frame (20); A piston (30) has a first end movably disposed inside the cylinder (10) and a second end extending out of the first side (11) of the cylinder (10) and being driven connected to an external component. A connecting ring (40) is sleeved and fixed on the outer peripheral wall of the cylinder body (10) near the first side (11). The connecting ring (40) has a through connecting hole (41). The axis of the connecting hole (41) is parallel to the axis of the cylinder body (10). The cylinder body (10) is fixedly connected to the frame (20) through the connecting hole (41).

2. The hydraulic cylinder according to claim 1, characterized in that, The connecting ring (40) has a first keyway on the side of the outer peripheral wall of the cylinder (10), and a second keyway corresponding to the first keyway is provided on the outer peripheral wall of the cylinder (10). The first keyway and the second keyway extend along the axial direction of the cylinder (10) and together form a first groove. The hydraulic cylinder also includes a first limiting key (50), which is located in the first groove to limit the rotation of the connecting ring (40) relative to the cylinder (10).

3. The hydraulic cylinder according to claim 2, characterized in that, The connecting ring (40) includes a first ring body (42) and a second ring body (43) that are symmetrically arranged and detachably connected. The first ring body (42) and the second ring body (43) are arc-shaped structures, and the first keyway is provided on the first ring body (42) and / or the second ring body (43).

4. The hydraulic cylinder according to claim 2, characterized in that, There are multiple first keyways and multiple second keyways. The multiple first keyways and multiple second keyways are arranged at intervals along the circumference of the connecting ring (40), and the first keyways and the second keyways are arranged in a one-to-one correspondence.

5. The hydraulic cylinder according to claim 1, characterized in that, The connecting ring (40) is provided with a plurality of connecting holes (41), and the plurality of connecting holes (41) are evenly arranged at intervals along the circumference of the connecting ring (40).

6. The hydraulic cylinder according to claim 1, characterized in that, The hydraulic cylinder also includes: The cylinder head (60) is fixedly connected to the second end of the piston (30); The connector (70) is sleeved and fixed to the outer peripheral wall of the cylinder head (60); A guide rod (80) is provided, one end of which is connected to the connector (70), and the other end of which is connected to the frame (20). The guide rod (80) is used to guide the movement of the cylinder head (60).

7. The hydraulic cylinder according to claim 6, characterized in that, Two guide rods (80) are provided, and the two guide rods (80) are arranged symmetrically along the radial direction of the cylinder head (60).

8. The hydraulic cylinder according to claim 6, characterized in that, The connector (70) includes a first connecting structure (71) and a second connecting structure (72) that are detachably connected. The first connecting structure (71) is arc-shaped, and the second connecting structure (72) is used to connect with the guide rod (80).

9. The hydraulic cylinder according to claim 6, characterized in that, The connector (70) has a third keyway on the side near the outer peripheral wall of the cylinder head (60), and the outer peripheral wall of the cylinder head (60) has a fourth keyway corresponding to the third keyway. The third keyway and the fourth keyway extend along the axial direction of the cylinder body (10) and together form a second groove. The hydraulic cylinder also includes a second limiting key (90), which is located in the second groove to limit the rotation of the connector (70) relative to the cylinder head (60).

10. A side pressing device for a vertical rolling mill, characterized in that, Includes the hydraulic cylinder as described in any one of claims 1 to 9.

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