Limiting structure for piston in sliding block of press machine
By designing a limit structure including cylinder, piston and limit stop in the press, the problem of poor deformation and assembly and coordination of parts during piston limit is solved, and reliable restriction of piston movement and effective sealing of hydraulic oil is achieved.
Patent Information
- Application Number
- CN202421723050.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-20
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-20
AI Technical Summary
In existing presses, when the piston is limited in the cylinder, the split sleeve is prone to deformation and rounding of parts during the cutting process, resulting in poor assembly and coordination.
A limiting structure is designed, including a cylinder, piston and limiting stop. The opening of the cylinder block is threaded and the limiting stop is connected and locked. A tightening screw is inserted at the connection between the limiting stop and the cylinder block, and a sealing ring is used to prevent hydraulic oil leakage.
Through the design of locking threads and fixing screws, the piston movement is limited, the parts are deformed, the reliability of assembly and fit is improved, and the hydraulic oil leakage is prevented through the sealing ring to ensure the formation of high-pressure oil cavity.
Smart Images
Figure CN222991823U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a limiting structure for a piston inside a slider of a press. Background Art
[0002] In modern presses, a cylinder block and a piston are usually arranged inside the slider. A high-pressure oil cavity is formed between the cylinder block and the piston. The stamping tonnage of the press can be calculated by detecting the oil pressure in the cavity. The high-pressure oil cavity is connected to a hydraulic overload protection device. The overload protection device of the press can quickly respond in case of overload of the press, immediately stop the press during the working process, prevent damage to the workpiece being processed by the press during overload, and prevent harm to the operating personnel, which can greatly improve the safety of the press and also protect the safety of the press body.
[0003] The piston is usually limited in the cylinder block by using a split sleeve. The split sleeve is cut after the overall processing is completed, and the phenomenon of part deformation and out-of-roundness is likely to occur during the cutting process, directly leading to the problem of poor fit between parts during the assembly process. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art and provide a limiting structure for a piston inside a slider of a press.
[0005] A limiting structure for a piston inside a slider of a press, characterized in that it includes a cylinder block, a piston, and a limiting stopper. The cylinder block is fixed inside the slider. The cylinder block is a lidless structure. The piston is movably fitted inside the cylinder block. A concentric annular protrusion is provided on the upper end surface of the piston. A limiting stopper is provided between the outer side wall of the annular protrusion and the inner side wall of the cylinder block. The limiting stopper is located above the piston. The limiting stopper is a ring-shaped structure, and its outer side wall is provided with threads. The inner side wall at the opening of the cylinder block is provided with threads. The limiting stopper is threadedly connected to the cylinder block.
[0006] Preferably, a plurality of set screws are provided at the connection between the limiting stopper and the cylinder block.
[0007] Preferably, at least two sealing rings are provided between the outer side wall of the piston and the inner side wall of the cylinder block. The sealing rings are located in an annular groove, and the groove is located on the outer side wall of the piston.
[0008] Advantageous Effects: Compared with the prior art, the utility model locks and limits the movement of the piston by processing threads on the upper opening of the cylinder block and threadedly connecting it with the limiting stopper. Set screws are inserted at the connection between the limiting stopper and the cylinder block to prevent the nut from rotating. In addition, a sealing ring is used for sealing to prevent internal hydraulic oil leakage and ensure the formation of a high-pressure oil cavity. Description of the Drawings
[0009] Figure 1It is a schematic diagram of a limiting structure for a piston inside a slide of a press;
[0010] In the figure, 1, slider, 2, cylinder body, 3, piston, 4, limit stopper, 5, annular protrusion, 6, set screw, 7, sealing ring, 8, adjusting nut, 9, adjusting screw. DETAILED DESCRIPTION
[0011] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.
[0012] like Figure 1 As shown, the slider 1, the cylinder body 2, the piston 3, the limit stopper 4, the annular protrusion 5, the set screw 6, the sealing ring 7, the adjusting nut 8, and the adjusting screw 9;
[0013] A limiting structure for a piston inside a slide of a press machine comprises a cylinder body 2, a piston 3 and a limiting stopper 4. The cylinder body 2 is fixed inside a slide 1 and is a coverless structure. The piston 3 is movably fitted in the cylinder body 2. A concentric annular protrusion 5 is provided on the upper end surface of the piston 3. A limiting stopper 4 is provided between the outer wall of the annular protrusion 5 and the inner wall of the cylinder body 2. The limiting stopper 4 is located above the piston 3. The limiting stopper 4 is an annular structure, and its outer wall is provided with a thread. The inner wall at the opening of the cylinder body 2 is provided with a thread. The limiting stopper 4 is threadedly connected to the cylinder body 2. A plurality of fixing screws 6 are provided at the connection between the limiting stopper 4 and the cylinder body 2. At least two sealing rings 7 are provided between the outer wall of the piston 3 and the inner wall of the cylinder body 2. The sealing ring 7 is located in an annular groove, and the groove is located on the outer wall of the piston 3.
[0014] It should be noted that a high-pressure oil chamber is formed between the lower end surface of the piston 3 and the bottom surface of the cylinder body 2. The high-pressure oil chamber structure includes a locking nut, a cylinder body 2, a piston 3, a set screw 6, and a sealing ring 7. The opening on the cylinder body 2 is a thread corresponding to the nut. Two sealing rings 7 of corresponding sizes are installed on the outer ring of the piston 3. After the combination, it is installed into the cylinder body 2, and then the limit stopper 4 is screwed into the cylinder body 2. Finally, a set screw 6 is used at the connection to prevent the locking nut from rotating.
[0015] A gap must be left between the piston 3 and the adjusting nut 8 above it. The structure above the piston 3 is the mold height adjustment mechanism of the slider 1. The adjusting nut 8 is driven to rotate through the worm gear transmission, driving the adjusting screw 9 to rise or fall. Therefore, a gap must be left between the piston 3 and the adjusting nut 8. The locking nut must be pressed against the piston 3 to form a high-pressure oil chamber to prevent the piston 3 from pressing against the adjusting nut 8 when high pressure occurs, causing the adjusting nut 8 to be unable to rotate.
[0016] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A limiting structure for a piston inside a slide of a press, characterized in that: It includes a cylinder body, a piston, and a limit stopper. The cylinder body is fixed inside the slider and is a coverless structure. The piston is movably embedded in the cylinder body. A concentric annular protrusion is provided on the upper end face of the piston. A limit stopper is provided between the outer wall of the annular protrusion and the inner wall of the cylinder body. The limit stopper is located above the piston. The limit stopper is an annular structure, and its outer wall is provided with threads. The inner wall of the cylinder opening is provided with threads, and the limit stopper is threadedly connected to the cylinder body.
2. A limiting structure for a piston inside a slide block of a press machine according to claim 1, characterized in that: A plurality of set screws are arranged at the connection between the limit stopper and the cylinder body.
3. The limiting structure for the piston inside the slide block of a press machine according to claim 1, characterized in that: At least two sealing rings are arranged between the outer side wall of the piston and the inner side wall of the cylinder body. The sealing rings are located in an annular groove, and the groove is located on the outer side wall of the piston.