Hydraulic small bin with pressure head and pressure pad in spherical pair connection

Abstract

The utility model relates to a hydraulic small bin with a pressure head and a pressure pad connected through a spherical pair, and belongs to the technical field of mechanical equipment in the metallurgical industry. Comprising a cylinder body, a piston rod is arranged in the cylinder body, a front cover plate covers the front end of the cylinder body, one end of the piston rod penetrates through the front cover plate, and the cylinder body is fixedly connected with the front cover plate through screws; a pressure head is arranged at one end of the piston rod, a pressure pad is arranged between the pressure head and the piston rod, and a spherical pair connecting structure is formed between the pressure head and the pressure pad; the end part of the piston rod is covered with a dust cover; the dust cover is fixed on the pressure head; oil injection holes are formed in the periphery of the pressing head, an oil injection channel is formed in the pressing head, and the oil injection holes are communicated with the gap between the pressing head and the pressing pad through the oil injection channel. The pressing head and the pressing pad are connected through a spherical pair, and universal rotation of the pressing head can be achieved; the dustproof cover is fixed to the pressing head through the elastic check ring, assembling and disassembling are convenient, and time and labor are saved; a guide mechanism on the dustproof cover is omitted, the damage frequency of the dustproof cover is reduced, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to a hydraulic small bin with a spherical pair connection between a pressure head and a pressure pad, belonging to the technical field of metallurgical industry mechanical equipment. Background Art

[0002] Due to certain errors in equipment manufacturing and installation, there are certain clearances between the rolling mill frame and the guide rail, as well as between the parts at each rotating part. In actual rolling production, the center line of the rolling mill frame is skewed to a certain extent from the rolling center line. The contact of the pressure head in the hydraulic small bin is theoretically a point, but due to elastic deformation, it is actually a relatively small surface. Due to the too small contact surface, it is extremely easy to cause wear. Also, due to the incoming pipe being not straight, uneven in wall thickness, and uneven in temperature, during the working processes of the roll biting the steel, rolling, and ejecting the steel, in the actual steel pipe rolling process, the magnitude and direction of the rolling force are not constant. Over a long time, the complex stress condition will cause the piston rod of the hydraulic small bin to rotate.

[0003] Figure 1 Fig. is the original structure diagram of the hydraulic small bin. Figure 2 is Figure 1 the A-A cross-sectional view in. To prevent the piston rod in the hydraulic small bin from rotating, a guiding mechanism is composed of a screw pin fixing the front cover and the cylinder body and the hole on the dust cover. The pressure head and the pressure pad form a cylindrical rotating pair, and the lubricating oil between the pressure head and the pressure pad enters through the oil injection hole provided on the dust cover. The dust cover is fixedly connected to the pressure head with 12 screws. Besides fixing the dust cover, the screws also offset the shear stress of the guiding mechanism. However, the following problems exist:

[0004] 1) Since the dust cover is relatively thin, usually 6 mm, the guiding mechanism composed of the screw pin and the dust cover is likely to damage the dust cover. Besides the need to prepare necessary spare parts, the replacement of the protective cover is also very troublesome, increasing the scheduled repair time and affecting the production efficiency.

[0005] 2) The dust cover is fixed to the pressure head with screws, with a complex structure and inconvenient disassembly and assembly at the work site.

[0006] 3) Due to the above reasons, the dust cover is basically not installed on site; this not only affects the service life of the hydraulic small bin; but also the lubricating oil cannot be injected between the pressure head and the pressure pad through the oil injection hole of the dust cover, affecting the service life of the pressure head and the pressure pad. If the dust cover is not installed, the guiding mechanism does not exist either, resulting in the rotation of the piston rod during the steel pipe rolling process, driving the pressure head to rotate at the same time. There is a jump in the pressure head during the rolling process, increasing the adjustment error of the roll spacing and seriously affecting the product quality. Summary of the Invention

[0007] The technical problem to be solved by the present utility model is to provide a hydraulic small chamber with a spherical pair connection between the pressure head and the pressure pad for the above-mentioned existing technology. A spherical rotating pair is used to connect the pressure head and the pressure pad to achieve universal rotation. When the piston rod rotates, it does not affect the use effect of the hydraulic small chamber; the quality control of the steel pipe wall thickness is realized; the damage frequency of the dust cover is reduced, which is convenient for maintenance; the oil injection hole is arranged on the pressure head, which is beneficial to smooth oil passage.

[0008] The technical solution adopted by the present utility model to solve the above problems is as follows: A hydraulic small chamber with a spherical pair connection between the pressure head and the pressure pad, including a cylinder block, a piston rod is arranged in the cylinder block, a front cover plate is arranged on the front end of the cylinder block, and one end of the piston rod passes through the front cover plate. The cylinder block and the front cover plate are fixedly connected by screws; a pressure head is arranged at one end of the piston rod, a pressure pad is arranged between the pressure head and the piston rod, and a spherical pair connection structure is formed between the pressure head and the pressure pad; a dust cover is arranged at the end of the piston rod, and the dust cover is fixed to the pressure head; an oil injection hole is opened on the outer periphery of the pressure head, and an oil injection channel is arranged in the pressure head. The oil injection hole is communicated with the gap between the pressure head and the pressure pad through the oil injection channel.

[0009] The outer side surface of the pressure pad has a groove recessed inward, and the inner side surface of the pressure head is spherical.

[0010] A retaining ring groove is opened on the outer periphery of the pressure head, a retaining ring is arranged in the retaining ring groove, and the retaining ring abuts against the outer side surface of the dust cover.

[0011] The oil injection channel includes a vertical oil injection channel and a horizontal oil injection channel. One end of the vertical oil injection channel is communicated with the oil injection hole, and the other end of the vertical oil injection channel is communicated with the horizontal oil injection channel.

[0012] The retaining ring is an elastic retaining ring.

[0013] Compared with the prior art, the advantages of the present utility model are as follows: A hydraulic small chamber with a spherical pair connection between the pressure head and the pressure pad. A spherical pair connection is adopted between the pressure head and the pressure pad, which can realize the universal rotation of the pressure head; when the piston rod rotates, it does not affect the use effect of the hydraulic small chamber, and the quality control of the steel pipe wall thickness is well realized. The dust cover is fixed to the pressure head by an elastic retaining ring, which is convenient for installation and disassembly, saving time and effort; the guiding mechanism is cancelled on the dust cover, reducing the damage frequency of the dust cover and being convenient for maintenance. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the original hydraulic small chamber;

[0015] Figure 2 is Figure 1 the A-A cross-sectional view in

[0016] Figure 3 It is a schematic diagram of a hydraulic small chamber with a spherical pair connection between the pressure head and the pressure pad according to an embodiment of the present utility model;

[0017] Figure 4 For Figure 3 Schematic diagram in the direction of B in

[0018] In the figure, 1 is the cylinder block, 2 is the piston rod, 3 is the dust cover, 4 is the oil injection hole, 5 is the pressure head, 6 is the pressure pad, 7 is the snap ring, 8 is the oil injection channel, and 9 is the front cover plate. Specific implementation mode

[0019] The following further describes the present utility model in detail with reference to the embodiments of the drawings.

[0020] As Figure 3 、 4 shown, a hydraulic small chamber with a spherical pair connection between the pressure head and the pressure pad in this embodiment includes a cylinder block 1. A piston chamber is provided inside the cylinder block 1. The piston rod 2 is horizontally arranged in the piston chamber. The front end of the cylinder block 1 is covered with a front cover plate 9, and one end of the piston rod 2 passes through the front cover plate 9. The cylinder block 1 and the front cover plate 9 are fixedly connected by screws. One end of the piston rod 2 is provided with a pressure head 5. There is a gap between the pressure head 5 and the end of the piston rod 2. A pressure pad 6 is arranged in the gap. The outer side surface of the pressure pad 6 has a recessed groove inward. The inner side surface of the pressure head is spherical, so that a spherical pair connection is formed between the pressure pad 6 and the pressure head, realizing the universal rotation of the pressure head; when the piston rod rotates, it does not affect the use effect of the hydraulic small chamber. The end of the piston rod 2 is covered with a dust cover 3 to prevent dust from entering the piston chamber. A snap ring groove is opened on the outer periphery of the pressure head 5. A snap ring 7 is arranged in the snap ring groove, and the snap ring 7 abuts against the outer side surface of the dust cover, so that the dust cover is fixed to the pressure head, realizing the convenient installation and disassembly of the dust cover, saving time and effort.

[0021] An oil injection hole 4 is opened on the outer periphery of the pressure head 5. An oil injection channel 8 is arranged inside the pressure head 5. The oil injection hole 4 is communicated with the gap between the pressure head and the pressure pad through the oil injection channel 8. Lubricating oil flows into the gap between the pressure head and the pressure pad through the oil injection hole and the oil injection channel. The lubricating oil oil path is smooth, improving the service life of the pressure head and the pressure pad.

[0022] The above oil injection channel includes a vertical oil injection channel and a horizontal oil injection channel. One end of the vertical oil injection channel is communicated with the oil injection hole, and the other end of the vertical oil injection channel is communicated with the gap between the pressure head and the pressure pad through the horizontal oil injection channel.

[0023] In this application, a spherical pair connection is adopted between the pressure head and the pressure pad, which can realize the universal rotation of the pressure head; when the piston rod rotates, it does not affect the use effect of the hydraulic small chamber, and well realizes the quality control of the steel pipe wall thickness. The dust cover is fixed to the pressure head through a snap ring, which is convenient for installation and disassembly, saving time and effort; the guiding mechanism is cancelled on the dust cover, reducing the damage frequency of the dust cover and being convenient for maintenance.

[0024] In addition to the above embodiments, the present utility model also includes other implementation modes. All technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. A hydraulic small chamber with a spherical pair connection between the indenter and the pressure pad, characterized in that: It includes a cylinder block, a piston rod is arranged in the cylinder block, a front cover plate is provided on the front end of the cylinder block, and one end of the piston rod penetrates through the front cover plate. The cylinder block and the front cover plate are fixedly connected by screws; a pressing head is arranged at one end of the piston rod, a pressing pad is arranged between the pressing head and the piston rod, and a spherical pair connection structure is formed between the pressing head and the pressing pad; a dust cover is arranged at the end of the piston rod, and the dust cover is fixed to the pressing head; an oil injection hole is formed in the outer periphery of the pressing head, an oil injection channel is arranged in the pressing head, and the oil injection hole is communicated with the gap between the pressing head and the pressing pad through the oil injection channel.

2. The hydraulic small bin with a spherical pair connection between the indenter and the pressure pad according to claim 1, characterized in that: The outer side surface of the pressing pad has a groove recessed inward, and the inner side surface of the pressing head is spherical.

3. A hydraulic small chamber with a spherical pair connection between a punch and a pressure pad, characterized in that: A retaining ring groove is formed in the outer periphery of the pressing head, a retaining ring is arranged in the retaining ring groove, and the retaining ring abuts against the outer side surface of the dust cover.

4. A hydraulic small chamber with a spherical pair connection between a pressure head and a pressure pad, characterized in that: The oil injection channel includes a vertical oil injection channel and a horizontal oil injection channel. One end of the vertical oil injection channel is communicated with the oil injection hole, and the other end of the vertical oil injection channel is communicated with the horizontal oil injection channel.

5. The hydraulic small bin with a spherical pair connection between the indenter and the pressure pad according to claim 3, characterized in that: The retaining ring is an elastic retaining ring.

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