Double-layer buffering oil cylinder structure for shock absorption of sliding block of hydraulic machine

Abstract

The utility model discloses a double-layer buffering oil cylinder structure for shock absorption of a sliding block of a hydraulic machine, which comprises a cylinder body, the cylinder body is of an uncovered structure, a first cavity and a second cavity which are communicated with each other are arranged in the cylinder body, a first piston and a second piston are respectively arranged in the first cavity and the second cavity, the first cavity is positioned above the second cavity, and the second cavity is positioned above the second cavity. The first piston is fixedly connected with the second piston, a first oil cavity is formed between the bottom face of the first piston and the bottom face of the first cavity, a second oil cavity is formed between the bottom face of the second piston and the bottom face of the second cavity, and a first oil channel and a second oil channel which are communicated are formed in the first piston and the second piston respectively. The two ends of the first oil channel are connected with the first oil cavity and the second oil channel respectively, the two ends of the second oil channel are connected with the second oil cavity and the first oil channel respectively, and an oil inlet is formed in the second oil cavity.

Description

Technical Field

[0001] The utility model relates to a double-layer buffer oil cylinder structure for shock absorption of a slide block of a hydraulic press. Background Art

[0002] A hydraulic press is a machine that uses the static pressure of liquid to process products such as metal, plastic, rubber, wood, and powders. It is commonly used in pressing and forming processes such as forging, stamping, cold extrusion, straightening, bending, flanging, sheet metal drawing, powder metallurgy, and press fitting. Based on Pascal's law, these machines utilize liquid pressure to transmit power. There are many different types of hydraulic presses, and their applications vary greatly depending on the specific needs. For example, they can be categorized into two main types: oil presses and water presses, depending on the type of liquid used to transmit pressure.

[0003] Existing hydraulic presses generally use single-layer cylinders to reduce vibration of machine tools during blanking processing. The pressure used for large-tonnage presses is high, and the cylinder diameter is relatively large, requiring a larger installation space. As a result, the space and machine tools must be relatively larger, and manufacturing costs increase. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and to provide a double-layer buffer cylinder structure for shock absorption of a hydraulic press slide.

[0005] A double-layer buffer cylinder structure for hydraulic press slider shock absorption includes a cylinder body. The cylinder body is a coverless structure. A first chamber and a second chamber are provided inside the cylinder body. A first piston and a second piston are provided in the first chamber and the second chamber respectively. The first chamber is located above the second chamber. The first piston and the second piston are fixedly connected.

[0006] A first oil chamber is formed between the bottom surface of the first piston and the bottom surface of the first chamber, and a second oil chamber is formed between the bottom surface of the second piston and the bottom surface of the second chamber. A first oil channel and a second oil channel are respectively provided in the first piston and the second piston. The two ends of the first oil channel are respectively connected to the first oil chamber and the second oil channel, and the two ends of the second oil channel are respectively connected to the second oil chamber and the first oil channel. An oil inlet is provided in the second oil chamber.

[0007] Preferably, the cylinder body is a split structure, and the cylinder body includes a cylinder wall and a base. The cylinder wall is a cylindrical structure, and an inner circle is provided in the middle section of the inner wall of the cylinder wall. The first chamber is above the inner circle, and the second chamber is below the inner circle. A positioning protrusion is provided at the center of the upper end surface of the base, and the positioning protrusion is inserted into the bottom opening of the cylinder wall.

[0008] Preferably, an oil groove is provided on the upper end surface of the positioning protrusion.

[0009] Preferably, a connecting column is provided at the center of the lower end surface of the first piston, and the connecting column is movably inserted in the inner circle.

[0010] Preferably, the first piston and the second piston are fixedly connected by bolts.

[0011] Preferably, seals are provided between the first piston and the inner wall of the first chamber, between the second piston and the inner wall of the second chamber, and between the connecting column and the inner wall of the inner circle.

[0012] Preferably, the base is fixedly connected to the cylinder wall by bolts.

[0013] Preferably, the upper end surface of the first piston is fixedly connected to a transition plate by bolts.

[0014] Beneficial effects: Compared with the existing technology, the utility model increases the maximum pressure of the oil cylinder per unit volume through the double-piston structure, increases the maximum volume of the hydraulic oil through the double chamber, and at the same time increases the contact area between the hydraulic oil and the piston to reduce the pressure per unit area of ​​the piston. The double-layer buffer oil cylinder structure effectively improves the machine tool, reduces the installation space and reduces the manufacturing cost. This structure is simple, easy to install and promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the assembly of a double-layer buffer cylinder on a hydraulic press;

[0016] Figure 2 It is a cross-sectional view of a double-layer buffer cylinder;

[0017] In the figure, 1. hydraulic press, 2. slider, 3. impact mechanism, 4. bearing platform, 5. double-layer buffer cylinder, 6. transition plate, 7. first piston, 8. cylinder wall, 9. inner circle, 10. second piston, 11. base, 12. first oil chamber, 13. second oil chamber, 14. oil tank, 15. connecting column, 16. second oil channel, 17. first oil channel. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0019] like Figure 1-2 As shown, hydraulic press 1, slide 2, impact mechanism 3, bearing platform 4, double-layer buffer cylinder 5, transition plate 6, first piston 7, cylinder wall 8, inner circle 9, second piston 10, base 11, first oil chamber 12, second oil chamber 13, oil groove 14, connecting column 15, second oil channel 16, first oil channel 17;

[0020] A double-layer buffer cylinder structure for hydraulic press slider shock absorption includes a cylinder body. The cylinder body is a coverless structure. A first chamber and a second chamber are provided inside the cylinder body. A first piston 7 and a second piston 10 are provided in the first chamber and the second chamber respectively. The first chamber is located above the second chamber. The first piston 7 and the second piston 10 are fixedly connected by bolts.

[0021] A first oil chamber 12 is formed between the bottom surface of the first piston 7 and the bottom surface of the first chamber, and a second oil chamber 13 is formed between the bottom surface of the second piston 10 and the bottom surface of the second chamber. A first oil passage 17 and a second oil passage 16 are provided in the first piston 7 and the second piston 10, respectively. The two ends of the first oil passage 17 are connected to the first oil chamber 12 and the second oil passage 16, respectively. The two ends of the second oil passage 16 are connected to the second oil chamber 13 and the first oil passage 17, respectively. An oil inlet is provided in the second oil chamber 13. For details on the specific oil passage distribution, see Figure 1 .

[0022] In this embodiment, the cylinder body is a split structure, and the cylinder body includes a cylinder wall 8 and a base 11. The cylinder wall 8 is a cylindrical structure. An inner circle 9 is provided in the middle section of the inner wall of the cylinder wall 8. Above the inner circle 9 is the first chamber, and below the inner circle 9 is the second chamber. A positioning protrusion is provided at the center of the upper end surface of the base 11. The positioning protrusion is inserted into the bottom opening of the cylinder wall 8. An oil groove 14 is provided on the upper end surface of the positioning protrusion. The base 11 and the cylinder wall 8 are fixedly connected by bolts.

[0023] In this embodiment, a connecting column 15 is provided at the center of the lower end surface of the first piston 7 , and the connecting column 15 is movably inserted into the inner circle 9 .

[0024] In this embodiment, seals are provided between the first piston 7 and the inner wall of the first chamber, between the second piston 10 and the inner wall of the second chamber, and between the connecting column 15 and the inner wall of the inner circle 9 .

[0025] In this embodiment, the upper end surface of the first piston 7 is fixedly connected to a transition plate 6 by bolts, which is used to collide with the impact mechanism 3, so as to facilitate the subsequent maintenance and replacement of the buffer cylinder.

[0026] Instructions for use: There are two double-layer buffer cylinders 5, which are placed on both sides of the supporting platform 4 on the hydraulic press 1. The slider 2 is located above the supporting platform 4. Impact mechanisms 3 are provided on both sides of the slider 2 for colliding with the buffer cylinder.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-layer buffer cylinder structure for hydraulic press slider shock absorption, characterized in that: The cylinder body comprises a coverless structure, wherein a first chamber and a second chamber are provided in the cylinder body, wherein a first piston and a second piston are provided in the first chamber and the second chamber respectively, wherein the first chamber is located above the second chamber, and the first piston is fixedly connected to the second piston. A first oil chamber is formed between the bottom surface of the first piston and the bottom surface of the first chamber, and a second oil chamber is formed between the bottom surface of the second piston and the bottom surface of the second chamber. A first oil channel and a second oil channel are respectively provided in the first piston and the second piston. The two ends of the first oil channel are respectively connected to the first oil chamber and the second oil channel, and the two ends of the second oil channel are respectively connected to the second oil chamber and the first oil channel. An oil inlet is provided in the second oil chamber.

2. A double-layer buffer cylinder structure for hydraulic press slider shock absorption according to claim 1, characterized in that: The cylinder body is a split structure, and the cylinder body includes a cylinder wall and a base. The cylinder wall is a cylindrical structure, and an inner circle is provided in the middle section of the inner wall of the cylinder wall. The first chamber is above the inner circle, and the second chamber is below the inner circle. A positioning protrusion is provided at the center of the upper end surface of the base, and the positioning protrusion is inserted into the bottom opening of the cylinder wall.

3. The double-layer buffer cylinder structure for hydraulic press slider shock absorption according to claim 2 is characterized in that: An oil groove is provided on the upper end surface of the positioning protrusion.

4. The double-layer buffer cylinder structure for hydraulic press slide vibration reduction according to claim 2 is characterized in that: A connecting column is provided at the center of the lower end surface of the first piston, and the connecting column is movably inserted in the inner circle.

5. The double-layer buffer cylinder structure for hydraulic press slide vibration reduction according to claim 1 is characterized in that: The first piston and the second piston are fixedly connected via bolts.

6. The double-layer buffer cylinder structure for hydraulic press slide vibration reduction according to claim 4 is characterized in that: Sealing elements are provided between the first piston and the inner wall of the first chamber, between the second piston and the inner wall of the second chamber, and between the connecting column and the inner wall of the inner circle.

7. The double-layer buffer cylinder structure for hydraulic press slider shock absorption according to claim 2 is characterized in that: The base is fixedly connected to the cylinder wall by bolts.

8. The double-layer buffer cylinder structure for hydraulic press slide vibration reduction according to claim 1 is characterized in that: The upper end surface of the first piston is fixedly connected with a transition plate by bolts.

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