Split type rail lifting hydraulic cylinder

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a split type track lifting hydraulic cylinder which comprises an oil cylinder, detachable end heads are arranged at the two ends of the oil cylinder, a piston is connected into the oil cylinder in a sliding mode, one end of the piston is fixedly connected with a piston rod, and the other end of the piston is fixedly connected with a hydraulic cylinder. Wherein one end of one end head is fixedly communicated with a guide end head, the piston rod penetrates through the guide end head, the side wall of the piston rod is in sliding connection with the inner wall of the guide end head, one end of the other end head is fixedly connected with a connecting block, the oil cylinder comprises a cylinder body, the two ends of the cylinder body are fixedly connected with inserting barrels, and the inserting barrels are fixedly connected with the piston rod. Positioning blocks are symmetrically and fixedly connected to the outer wall of the inserting cylinder, and the end comprises a hollow column head. When the oil cylinder is replaced or maintained, only the end heads at the two ends of the cylinder body need to be detached, a new oil cylinder is replaced, the replaced part only comprises the cylinder body, the inserting barrel and the positioning block, the number of the replaced parts is small, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, and in particular relates to a split track lifting hydraulic cylinder. Background Art

[0002] A rolling mill is a device that realizes the metal rolling process. According to the number of rolls, the rolling mill can be divided into two-roll, four-roll, six-roll, eight-roll, twelve-roll, eighteen-roll, etc. Considering the rolling state, the roll bearing seat needs to be separated from the track by a certain safety distance. Generally, the roll changing tracks of the working rolls and intermediate rolls are made movable and can be driven up and down by hydraulic cylinders.

[0003] The hydraulic cylinder used for lifting the rolling mill rails usually has an integrated cylinder body. When the cylinder body is impacted during use, or is deformed and damaged due to excessive pressure and cannot be used, the modules that need to be replaced during maintenance include the cylinder body and the sealing components and connecting components connected to the cylinder body. There are many parts that need to be replaced, which increases the difficulty and cost of maintenance. Utility Model Content

[0004] The purpose of the utility model is to provide a split track lifting hydraulic cylinder, which has fewer parts to be replaced during maintenance, thereby reducing maintenance costs and solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a split-type track lifting hydraulic cylinder, comprising an oil cylinder, both ends of the oil cylinder are provided with detachable end heads, a piston is slidably connected inside the oil cylinder, one end of the piston is fixedly connected to a piston rod, one end of one of the end heads is fixedly connected to a guide end head, the piston rod passes through the guide end head, and the side wall of the piston rod is slidably connected to the inner wall of the guide end head, and one end of the other end head is fixedly connected to a connecting block.

[0006] Furthermore, the oil cylinder comprises a cylinder body, both ends of the cylinder body are fixedly connected with an insert tube, and the outer wall of the insert tube is symmetrically fixedly connected with a positioning block.

[0007] Furthermore, the end cap includes a hollow column head, one end of the insert tube is plugged into one end of the hollow column head, a retaining ring is fixedly connected to the inside of the hollow column head, the inner wall of the hollow column head is symmetrically provided with slots, one end of the two positioning blocks are respectively engaged and connected to the inside of the two slots, and a through groove is opened on the side wall of the hollow column head.

[0008] Furthermore, a disc is movably sleeved on the side wall of the insert, and a slide groove is symmetrically opened on the side wall of the disc. A positioning groove is arranged at one end of the slide groove, and the other ends of the two positioning blocks are respectively arranged inside the two positioning grooves.

[0009] Furthermore, the hollow column head is provided with through holes equidistantly distributed around the axis of the hollow column head, and the disc is provided with threaded holes equidistantly distributed around the axis of the disc. Several of the through holes and several of the threaded holes are arranged in a one-to-one correspondence, and bolts are arranged inside each pair of corresponding through holes and threaded holes.

[0010] Furthermore, the guide end head includes a cylinder fixedly connected to one end of one of the hollow column heads, the piston rod passes through the cylinder, a dust ring is provided at one end of the cylinder, and an oil seal is provided inside the cylinder.

[0011] Furthermore, one end of the piston rod is fixedly connected to a connecting plate.

[0012] Compared with the prior art, the beneficial effect of the utility model is that when replacing or repairing the oil cylinder, it is only necessary to remove the end heads at both ends of the cylinder body and replace them with new cylinders. The replaced parts only include the cylinder body, the insert and the positioning block. Fewer parts need to be replaced, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a front cross-sectional view of the utility model;

[0015] Figure 3 It is an exploded view of the utility model;

[0016] Figure 4 It is a three-dimensional structural schematic diagram of the terminal of the utility model.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Cylinder; 11. Cylinder body; 12. Insert; 13. Positioning block; 2. End; 21. Hollow column head; 22. Retaining ring; 23. Slot; 24. Through slot; 25. Through hole; 26. Disc; 27. Slide; 28. Positioning slot; 29. ​​Threaded hole; 3. Guide end; 31. Cylinder; 32. Dust ring; 33. Oil seal; 4. Piston; 5. Piston rod; 51. Connecting plate; 6. Connecting block. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0020] like Figure 1-3As shown, a split type rail lifting hydraulic cylinder comprises an oil cylinder 1, both ends of the oil cylinder 1 are provided with detachable end heads 2, a piston 4 is slidably connected inside the oil cylinder 1, one end of the piston 4 is fixedly connected to a piston rod 5, one end of one of the end heads 2 is fixedly connected to a guide end head 3, the piston rod 5 penetrates the guide end head 3, and the side wall of the piston rod 5 is slidably connected to the inner wall of the guide end head 3, one end of the other end head 2 is fixedly connected to a connecting block 6, the oil cylinder 1 comprises a cylinder body 11, both ends of the cylinder body 11 are fixedly connected to an insert sleeve 12, the outer wall of the insert sleeve 12 is symmetrically fixedly connected to a positioning block 13, and one end of the piston rod 5 is fixedly connected to a connecting plate 51.

[0021] According to the above structure, when in use, the connecting plate 51 is connected to the rolling mill track, and the connecting block 6 is connected to the corresponding support seat on the rolling mill. When replacing or repairing the cylinder 1, it is only necessary to remove the end heads 2 at both ends of the cylinder body 11 and replace them with new cylinders 1. The replaced parts only include the cylinder body 11, the insert 12 and the positioning block 13. Fewer parts need to be replaced, thereby reducing maintenance costs.

[0022] like Figure 3 and 4 As shown, the end cap 2 includes a hollow column head 21, one end of the insert sleeve 12 is plugged into one end of the hollow column head 21, a retaining ring 22 is fixedly connected to the inside of the hollow column head 21, a groove 23 is symmetrically provided on the inner wall of the hollow column head 21, one end of the two positioning blocks 13 is respectively engaged and connected to the inside of the two grooves 23, a through groove 24 is provided on the side wall of the hollow column head 21, a disk 26 is movably sleeved on the side wall of the insert sleeve 12, a slide groove 27 is symmetrically provided on the side wall of the disk 26, a positioning groove 28 is provided at one end of the slide groove 27, and the other ends of the two positioning blocks 13 are respectively arranged inside the two positioning grooves 28, a through hole 25 equidistantly distributed around the axis of the hollow column head 21 is provided on the hollow column head 21, and a threaded hole 29 equidistantly distributed around the axis of the disk 26 is provided on the disk 26, a plurality of through holes 25 and a plurality of threaded holes 29 are arranged one by one, and bolts are arranged inside each pair of corresponding through holes 25 and threaded holes 29.

[0023] According to the above structure, during installation, the disc 26 is put on the cylinder body 11, and the two positioning blocks 13 are slid along the two slide grooves 27 respectively. When the disc 26 slides to the end of the cylinder body 11, the disc 26 is rotated to screw the positioning blocks 13 into the corresponding positioning grooves 28. The position of the disc 26 can be limited in the left and right directions. Then the insert 12 is inserted into the hollow column head 21, and the end of the positioning block 13 is embedded in the corresponding card groove 23. Then, the hollow column head 21 and the disc 26 are connected by bolts, and the end head 2 can be installed as a whole at the end of the cylinder body 11, which is convenient for installation.

[0024] like Figure 3As shown, in order to improve the stability of the extension and retraction of the piston rod 5, the guide end 3 includes a cylinder 31 fixedly connected to one end of one of the hollow column heads 21, the piston rod 5 passes through the cylinder 31, a dust ring 32 is provided at one end of the cylinder 31, and an oil seal 33 is provided inside the cylinder 31.

[0025] The working principle of the utility model is as follows: when in use, the connecting plate 51 is connected to the rolling mill track, and the connecting block 6 is connected to the corresponding support seat on the rolling mill. When replacing or repairing the oil cylinder 1, it is only necessary to remove the end heads 2 at both ends of the cylinder body 11 and replace the new oil cylinder 1. The replaced parts only include the cylinder body 11, the insert sleeve 12 and the positioning block 13. The replaced parts are relatively few, which reduces the maintenance cost. When installing, the disc 26 is sleeved on the cylinder body 11, and the two positioning blocks 13 are slid along the two slide grooves 27 respectively. When the disc 26 slides to the end of the cylinder body 11, the disc 26 is rotated to make the positioning block 13 screw into the corresponding positioning groove 28. The position of the disc 26 can be limited in the left and right directions. Then the insert sleeve 12 is inserted into the interior of the hollow column head 21, and the end of the positioning block 13 is embedded in the corresponding card groove 23. Then the hollow column head 21 and the disc 26 are connected by bolts, and the end head 2 can be installed on the end of the cylinder body 11 as a whole, which is convenient to install.

[0026] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A split rail lifting hydraulic cylinder, comprising a cylinder (1), characterized in that: Both ends of the oil cylinder (1) are provided with detachable end heads (2), the interior of the oil cylinder (1) is slidably connected to a piston (4), one end of the piston (4) is fixedly connected to a piston rod (5), one end of one of the end heads (2) is fixedly connected to a guide end head (3), the piston rod (5) passes through the guide end head (3), and the side wall of the piston rod (5) is slidably connected to the inner wall of the guide end head (3), and one end of the other end head (2) is fixedly connected to a connecting block (6).

2. The split rail lifting hydraulic cylinder according to claim 1 is characterized in that: The oil cylinder (1) comprises a cylinder body (11), both ends of the cylinder body (11) are fixedly connected to an insert cylinder (12), and the outer wall of the insert cylinder (12) is symmetrically fixedly connected to a positioning block (13).

3. A split rail lifting hydraulic cylinder according to claim 2, characterized in that: The end cap (2) comprises a hollow column head (21), one end of the insert tube (12) is plugged into one end of the hollow column head (21), a retaining ring (22) is fixedly connected to the inside of the hollow column head (21), the inner wall of the hollow column head (21) is symmetrically provided with card slots (23), one end of the two positioning blocks (13) are respectively engaged and connected to the inside of the two card slots (23), and a through slot (24) is opened on the side wall of the hollow column head (21).

4. The split rail lifting hydraulic cylinder according to claim 3 is characterized in that: The side wall of the insert cylinder (12) is movably sleeved with a disc (26), the side wall of the disc (26) is symmetrically provided with a slide groove (27), one end of the slide groove (27) is provided with a positioning groove (28), and the other ends of the two positioning blocks (13) are respectively arranged inside the two positioning grooves (28).

5. The split rail lifting hydraulic cylinder according to claim 4 is characterized in that: The hollow column head (21) is provided with through holes (25) which are equidistantly distributed around the axis of the hollow column head (21); the disk (26) is provided with threaded holes (29) which are equidistantly distributed around the axis of the disk (26); a plurality of the through holes (25) and a plurality of the threaded holes (29) are arranged in a one-to-one correspondence; and a bolt is arranged inside each pair of the corresponding through holes (25) and threaded holes (29).

6. The split rail lifting hydraulic cylinder according to claim 5, characterized in that: The guide end head (3) comprises a cylinder (31) fixedly connected to one end of one of the hollow column heads (21), the piston rod (5) passes through the cylinder (31), a dust ring (32) is provided at one end of the cylinder (31), and an oil seal (33) is provided inside the cylinder (31).

7. The split rail lifting hydraulic cylinder according to claim 6 is characterized in that: One end of the piston rod (5) is fixedly connected to a connecting plate (51).

Images