Piston assembly for hinge beam of cubic press

Abstract

The utility model discloses a piston assembly for a hinge beam of a cubic press, which comprises a piston matched with a cylinder body, a piston rod is arranged on the piston, a guide sleeve matched with the piston rod is arranged at the front end in the cylinder body, a rotation stopping assembly is arranged between the inner wall of the cylinder body and the side wall of the piston rod, and the piston rod is arranged on the guide sleeve. The rotation stopping assembly is arranged close to the guide sleeve and comprises an arc-shaped limiting piece arranged on the side wall of the piston rod and an arc-shaped limiting groove formed in the inner wall of the cylinder body, and the arc-shaped limiting piece, the arc-shaped limiting groove and the cylinder body are coaxially arranged. The length of the arc-shaped limiting groove in the axis direction is larger than that of the arc-shaped limiting piece in the axis direction. The rotation stopping assembly is arranged between the inner wall of the cylinder body and the side wall of the piston rod, so that rotation of the piston and the piston rod is avoided, and the problem that installation space and conditions of an external accessory guide assembly of the oil cylinder are limited is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil cylinders, in particular to a piston assembly used for a hinge beam of a six-sided top press. Background Art

[0002] The six-sided top press utilizes the working principle of a six-sided top press. It pushes six carbide top hammers synchronously through hydraulics to extrude the synthetic material to generate high pressure, and heats it through low voltage and high power current to generate high temperature, so that the internal structure of the synthetic material undergoes qualitative changes to form a new superhard material. Each hinge beam of the six-sided top press is provided with hinge beam ears in the four directions of front, back, left and right. Each hinge beam ear is provided with a pin hole. Adjacent hinge beams are connected to each other through the ears and the ear gaps, and the ears plugged together are connected by the pin and the pin hole. The six hinge beams are connected to the hinge beam ears through the pins in six directions to form a hexahedral rigid frame, and the hinge beam below is installed on the machine base.

[0003] Among them, each hinge beam includes a hinge beam cylinder, and a large-diameter oil cylinder is provided inside the hinge beam cylinder. The operation of the large-diameter oil cylinder is controlled by the hydraulic system to drive the carbide top hammer to move. In addition, the six-sided top press has two characteristics when working. First, the displacement of the carbide top hammer is relatively short, which makes the stroke of the piston in the large-diameter oil cylinder shorter; second, the internal space of the six-sided top press is limited, and it is generally difficult to set up additional components.

[0004] The hydraulic cylinder can realize the linear motion of the piston and the piston rod through the guide sleeve arranged inside. However, it is found in practice that when the piston rod is subjected to a large oblique bias force, the piston rod and the piston will rotate around the axis at a certain angle, which also causes the top hammer to rotate to a certain extent following the piston rod. The rotation deviation of the top hammer will cause the six top hammers to be not tightly closed, which may easily affect the production quality of superhard materials. Therefore, it is necessary to avoid the rotation of the piston and the piston rod. The existing method is mostly to set an additional guide component on the outside of the cylinder, but the internal space of the six-sided top press is limited, and it is difficult to meet the space and conditions for setting an external additional guide component. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a piston assembly for a hinge beam of a six-sided top press, so as to solve the technical problems raised in the background technology.

[0006] The utility model provides the following technical solutions:

[0007] A piston assembly for a hinge beam of a six-sided top press comprises a piston adapted to a cylinder body, a piston rod being provided on the piston, a guide sleeve adapted to the piston rod being provided at the front end of the cylinder body, a rotation-stop assembly being provided between the inner wall of the cylinder body and the side wall of the piston rod, the rotation-stop assembly being arranged close to the guide sleeve, the rotation-stop assembly comprising an arc-shaped limit plate provided on the side wall of the piston rod and an arc-shaped limit groove provided on the inner wall of the cylinder body, the arc-shaped limit plate and the arc-shaped limit groove being coaxially arranged with the cylinder body, and the length of the arc-shaped limit groove along its axial direction is greater than the length of the arc-shaped limit plate in the axial direction.

[0008] Preferably, the cylinder is coaxially arranged inside the hinge beam cylinder.

[0009] Preferably, the anti-rotation assembly also includes a piston block arranged on the inner side of the arc-shaped limit plate and a second cylinder body adapted to the piston block, the second cylinder body is connected to the side of the piston rod at one end away from the arc-shaped limit plate, and the length direction of the second cylinder body is perpendicular to and intersects with the axis of the piston rod.

[0010] Preferably, a return spring is provided between one end of the piston block away from the arc-shaped limiting piece and the interior of the second cylinder body.

[0011] Preferably, both ends of the outer surface of the arc-shaped limiting piece along its axial direction are rounded transitions.

[0012] Preferably, the side of the piston block is provided with several anti-slip grooves along its length direction, and the anti-slip groove passes through the upper end surface of the piston block at one end close to the arc-shaped limiting plate, but does not pass through the lower end surface of the piston block at one end away from the arc-shaped limiting plate.

[0013] Preferably, an upper end plate is provided at one end of the second cylinder body away from the piston rod, and a plurality of anti-slip limiting plates adapted to the anti-slip grooves are provided on the inner ring of the upper end plate.

[0014] Preferably, a plurality of the anti-rotation assemblies are provided, and the plurality of the anti-rotation assemblies are arranged in sequence at equal intervals along the circumference of the piston rod.

[0015] Preferably, a top hammer seat is provided at one end of the piston rod away from the piston.

[0016] Preferably, a top hammer is provided on the top hammer seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model discloses a piston assembly for a hinge beam of a six-sided top press, wherein a rotation-stop assembly is arranged between the inner wall of the cylinder body and the side wall of the piston rod. The rotation-stop assembly includes an arc-shaped limiting piece arranged on the side wall of the piston rod and an arc-shaped limiting groove arranged on the inner wall of the cylinder body. The arc-shaped limiting piece can move along its axial direction inside the arc-shaped limiting groove, but cannot rotate along its arc direction, thereby avoiding rotation of the piston and the piston rod, and solving the problem of limited installation space and conditions of the external accessory guide assembly of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 This is a schematic structural diagram of the anti-rotation component of the present utility model.

[0022] Figure 3 For this utility model Figure 2 A local enlarged schematic diagram of point A.

[0023] Figure 4 This is a schematic diagram of the distribution of the anti-rotation components of the utility model.

[0024] Figure 5 For this utility model Figure 4 A partial enlarged schematic diagram of point B.

[0025] Figure 6 This is a schematic diagram of the upper end plate structure of the present utility model. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] See also Figure 1-6 As shown, a piston assembly for the hinge beam of a six-sided top press includes a piston 2 adapted to a cylinder body 1, the cylinder body 1 is coaxially arranged inside the hinge beam barrel 6, a piston rod 3 is provided on the piston 2, a guide sleeve 4 adapted to the piston rod 3 is provided at the front end of the cylinder body 1, a rotation-stop assembly 5 is provided between the inner wall of the cylinder body 1 and the side wall of the piston rod 3, the rotation-stop assembly 5 is arranged close to the guide sleeve 4, and the rotation-stop assembly 5 includes an arc-shaped limiting piece 51 provided on the side wall of the piston rod 3 and an arc-shaped limiting groove 52 provided on the inner wall of the cylinder body 1, and the length of the arc-shaped limiting groove 52 along its axial direction is greater than the length of the arc-shaped limiting piece 51 along its axial direction. Figure 1 As shown, in the initial state, the piston 2 is located at the bottom of the cylinder body 1. At this time, the left end of the arc-shaped limit groove 52 is a distance away from the piston 2. This distance is the maximum stroke of the piston. This stroke can meet the stroke required by the top hammer, and the axial length of the arc-shaped limit groove 52 can also meet the stroke required by the top hammer. The displacement of the carbide top hammer is shorter, which makes the stroke of the piston in the large-diameter oil cylinder shorter. By arranging a stop assembly between the inner wall of the cylinder body and the side wall of the piston rod, the stop assembly includes an arc-shaped limit plate provided on the side wall of the piston rod and an arc-shaped limit groove provided on the inner wall of the cylinder body. The arc-shaped limit plate can move along its axial direction inside the arc-shaped limit groove, but cannot rotate along its arc direction, thereby avoiding the rotation of the piston and the piston rod, and also solving the problem of limited installation space and conditions of the external accessory guide assembly of the cylinder.

[0029] The arc-shaped limiting piece 51 and the arc-shaped limiting groove 52 are both coaxially arranged with the cylinder body 1 , and the circumferential angles of the arc-shaped limiting piece 51 and the arc-shaped limiting groove 52 are the same.

[0030] The anti-rotation assembly 5 also includes a piston block 53 disposed inside the arc-shaped stopper 51 and a second cylinder 54 adapted to fit the piston block 53. The end of the second cylinder 54, distal from the arc-shaped stopper 51, is connected to the side of the piston rod 3. The length of the second cylinder 54 is perpendicular to and intersects the axis of the piston rod 3. The cross-section of the second cylinder 54 is a rectangular frame, which prevents the piston block 53 from rotating inside the second cylinder. The outer dimensions of the piston block 53 are the same as the inner dimensions of the second cylinder, preventing the piston block 53 from shaking inside the second rod.

[0031] A return spring 55 is provided between the end of the piston block 53 away from the arc-shaped limiting piece 51 and the interior of the second cylinder body 54. The two ends of the outer surface of the arc-shaped limiting piece 51 along its axial direction are rounded transitions. If the arc-shaped limiting piece 51 cannot be retracted, the piston rod will be unable to be installed inside the cylinder body. By providing the second cylinder body 54, the piston block 53 and the return spring 55, when the piston rod is installed, the arc-shaped limiting piece 51 is squeezed by the inner wall of the cylinder body and can move toward the piston rod. At this time, the return spring is compressed. When the arc-shaped limiting piece 51 moves to the position of the arc-shaped limiting groove 52, the return spring can reset the arc-shaped limiting piece 51 to the inside of the arc-shaped limiting groove 52.

[0032] The side of the piston block 53 is provided with a plurality of anti-slip grooves 57 along its length. The end of the anti-slip groove 57 close to the arc-shaped limiting piece 51 passes through the upper end surface of the piston block 53, but the end of the anti-slip groove 57 away from the arc-shaped limiting piece 51 does not pass through the lower end surface of the piston block 53. The end of the second cylinder body 54 away from the piston rod 3 is provided with an upper end plate 56. The inner ring of the upper end plate 56 is provided with a plurality of anti-slip limiting pieces 58 that match the anti-slip grooves 57. This prevents the piston block 53 from falling out of the second cylinder body 54 before the piston rod is installed.

[0033] There are a plurality of anti-rotation assemblies 5, which are arranged in sequence at equal intervals along the circumference of the piston rod 3. This further improves the stability of the piston and the piston rod during operation and reduces the oblique force on the single second cylinder.

[0034] A top hammer seat 7 is provided at one end of the piston rod 3 away from the piston 2 .

[0035] A top hammer 8 is provided on the top hammer seat 7.

[0036] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A piston assembly for a hinge beam of a six-sided top press, comprising a piston (2) adapted to a cylinder (1), a piston rod (3) provided on the piston (2), and a guide sleeve (4) adapted to the piston rod (3) provided at the front end of the cylinder (1), characterized in that: A rotation-stop assembly (5) is provided between the inner wall of the cylinder body (1) and the side wall of the piston rod (3). The rotation-stop assembly (5) is provided close to the guide sleeve (4). The rotation-stop assembly (5) comprises an arc-shaped limiting piece (51) provided on the side wall of the piston rod (3) and an arc-shaped limiting groove (52) provided on the inner wall of the cylinder body (1). The arc-shaped limiting piece (51) and the arc-shaped limiting groove (52) are both provided coaxially with the cylinder body (1), and the length of the arc-shaped limiting groove (52) along its axial direction is greater than the length of the arc-shaped limiting piece (51) along its axial direction.

2. The piston assembly for a hinge beam of a six-sided top press according to claim 1, characterized in that: The anti-rotation assembly (5) further comprises a piston block (53) arranged on the inner side of the arc-shaped limiting plate (51) and a second cylinder body (54) adapted to the piston block (53); the end of the second cylinder body (54) away from the arc-shaped limiting plate (51) is connected to the side of the piston rod (3); the length direction of the second cylinder body (54) is perpendicular to and intersects the axis of the piston rod (3).

3. The piston assembly for a hinge beam of a six-sided top press according to claim 2, characterized in that: A return spring (55) is provided between one end of the piston block (53) away from the arc-shaped limiting piece (51) and the interior of the second cylinder body (54).

4. The piston assembly for a hinge beam of a six-sided top press according to claim 2, characterized in that: The two ends of the outer surface of the arc-shaped limiting piece (51) along the axis direction thereof are respectively rounded transitions.

5. A piston assembly for a hinge beam of a six-sided top press according to any one of claims 1 to 4, characterized in that: A plurality of the anti-rotation assemblies (5) are provided, and the plurality of anti-rotation assemblies (5) are arranged in sequence at equal intervals along the circumference of the piston rod (3).

6. The piston assembly for a hinge beam of a six-sided top press according to claim 1, characterized in that: The cylinder body (1) is coaxially arranged inside the hinge beam cylinder body (6).

7. The piston assembly for a hinge beam of a six-sided top press according to claim 1, characterized in that: A top hammer seat (7) is provided at one end of the piston rod (3) away from the piston (2).

8. The piston assembly for a hinge beam of a six-sided top press according to claim 7, characterized in that: A top hammer (8) is provided on the top hammer seat (7).

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