A gas-liquid ejecting cylinder and ejecting device for a press

Abstract

This utility model relates to a pneumatic-hydraulic ejection cylinder and ejection device for a press. The pneumatic-hydraulic ejection cylinder includes a single-acting small hydraulic cylinder and a double-acting pneumatic cylinder arranged in series. The double-acting pneumatic cylinder includes a front cover and a rear cover, with a cylinder barrel between the front and rear covers. A piston rod A is located inside the cylinder barrel, and a piston A is mounted on the piston rod A. Air inlets are provided on the front and rear covers respectively. The single-acting small hydraulic cylinder includes a small cylinder housing mounted on the rear cover. A piston rod B and a piston B are located inside the small cylinder housing. A through hole for the piston rod B to pass through is provided on the rear cover, and an oil inlet is provided on the rear side wall of the small cylinder housing. The ejection device includes the pneumatic-hydraulic ejection cylinder as described above. The pneumatic-hydraulic ejection cylinder is directly fixed to the press base, or the pneumatic-hydraulic ejection cylinder is mounted on the press base via an ear seat. The piston rod A is connected to the lower ejection mechanism. It has the advantages of reasonable structural design, balancing the large ejection force required for loosening and the rapid ejection required, and improving ejection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ejection technology for presses, specifically to a pneumatic-hydraulic ejection cylinder and ejection device for presses. Background Technology

[0002] Currently, the ejection methods of screw presses on the market are mainly divided into three types: pneumatic ejection, hydraulic ejection, and rigid ejection. In practical applications, pneumatic ejection mainly faces the problem of low ejection force, which severely limits its application range; hydraulic ejection is usually designed according to the ejection force required to open (release) the workpiece, but when the workpiece is opened (ejected), the actual ejection force required is less than the release force, which not only causes additional energy consumption, but also results in slow speed, high cost, and the need for a sufficiently large hydraulic pump station; the main disadvantage of rigid ejection is its complex structural design.

[0003] Existing ejection methods in the market all have some unresolved problems, while national policies advocate high efficiency and energy conservation, and faster ejection speeds can also increase factory efficiency. Therefore, there is an urgent need to develop an ejection device that is stable in performance, improves work efficiency, is cost-effective, and is energy-efficient.

[0004] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art and provide a gas-liquid ejection cylinder and ejection device for a press, which has the advantages of reasonable structural design, taking into account the large ejection force required for loosening and the speed required for ejection, and improving ejection efficiency.

[0006] This utility model achieves the above objectives by adopting the following technical solutions:

[0007] A pneumatic-hydraulic ejection cylinder for a press includes a single-acting small hydraulic cylinder and a double-acting pneumatic cylinder arranged in series. The double-acting pneumatic cylinder includes a front cover and a rear cover, with a cylinder barrel between the front cover and the rear cover. A piston rod A is disposed inside the cylinder barrel, and a piston A is disposed on the piston rod A. Air inlets are respectively provided on the front cover and the rear cover. The single-acting small hydraulic cylinder includes a small hydraulic cylinder housing disposed on the rear cover. A piston rod B is disposed inside the small hydraulic cylinder housing, and a piston B is disposed on the piston rod B. A through hole for the piston rod B to pass through is provided on the rear cover, and an oil inlet is provided on the rear side wall of the small hydraulic cylinder housing.

[0008] The front cover and the rear cover are connected by four countersunk bolts, and the countersunk bolts are equipped with lock nuts.

[0009] The small hydraulic cylinder housing includes an outer shell. The front end of the outer shell has multiple threaded holes A evenly spaced along its circumference. The corresponding rear end cover has multiple mounting holes A. Screws A are installed in the mounting holes A to fasten the outer shell to the rear end cover. A lifting ring is provided at the rear end of the outer shell. An inner cylinder is located on the inner wall of the outer shell. A sealing ring is provided between the inner cylinder and the outer shell. The piston B is slidably disposed within the inner cylinder. A guide seat is threaded onto the inner wall of the front end of the inner cylinder. A guide hole is provided within the guide seat, through which the piston rod B passes.

[0010] An ejection device for a press includes a gas-liquid ejection cylinder as described above. The lifting ring of the gas-liquid ejection cylinder is connected to a lifting lug. The lifting lug is bolted to the side wall of the press base. The press base is provided with a lower ejection mechanism. The connecting lug seat in the lower ejection mechanism is connected to a piston rod joint through a pin. The piston rod joint is threadedly connected to piston rod A.

[0011] Alternatively, the front end cover of the gas-liquid ejection cylinder is provided with a plurality of mounting holes B evenly spaced, and the lower end of the corresponding press base is provided with a plurality of threaded holes B. The gas-liquid ejection cylinder is fixed to the press base by installing screws B between the mounting holes B and the threaded holes B.

[0012] The present invention, by adopting the above-described structure, can bring the following beneficial effects:

[0013] By integrating a single-acting hydraulic cylinder with a double-acting pneumatic cylinder, the hydraulic cylinder and the pneumatic cylinder work together to increase the ejection force when the workpiece needs to be loosened. Once the workpiece is loosened, the pneumatic cylinder alone can quickly eject it. This design satisfies both the high ejection force required for loosening the workpiece and the speed required for ejection. The overall structure is compact and highly efficient. Attached Figure Description

[0014] Figure 1 This is a front view of the gas-liquid ejection cylinder of this utility model;

[0015] Figure 2 for Figure 1 Sectional view along line AA in the middle;

[0016] Figure 3 This is a perspective view of the gas-liquid ejection cylinder of this utility model;

[0017] Figure 4 This is an exploded view of the single-acting small hydraulic cylinder of this utility model;

[0018] Figure 5 This is an exploded view of the single-acting small hydraulic cylinder of this utility model from another perspective;

[0019] Figure 6This is a front view of the ejection device of this utility model;

[0020] Figure 7 This is a schematic diagram showing the connection between the gas-liquid ejection cylinder and the lower ejection mechanism of this utility model;

[0021] Figure 8 This is a schematic diagram of the structure of the gas-liquid ejector cylinder of this utility model, which is directly mounted on the base of the press.

[0022] Figure 9 for Figure 8 Enlarged view of part A in the image;

[0023] In the diagram, 1. Single-acting small hydraulic cylinder, 101. Small hydraulic cylinder housing, 102. Piston rod B, 103. Piston B, 104. Oil inlet, 105. Outer housing, 106. Threaded hole A, 107. Mounting hole A, 108. Screw A, 109. Lifting ring, 110. Mounting groove, 111. Inner cylinder barrel, 112. Sealing ring, 113. Guide seat, 114. Guide hole; 2. Double-acting cylinder, 201. Front end cover, 202. Rear end cover, 203. Cylinder barrel, 204. Piston rod A, 205. Piston A, 206. Air inlet, 207. Through hole, 208. Countersunk bolt, 209. Locking nut, 3. Lifting lug, 4. Press base, 5. Lower ejection mechanism, 6. Connecting lug, 7. Piston rod joint, 8. Mounting hole B, 9. Threaded hole B, 10. Screw B. Detailed Implementation

[0024] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0026] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] like Figure 1-5 As shown, a pneumatic-hydraulic ejection cylinder for a press includes a single-acting small hydraulic cylinder 1 and a double-acting cylinder 2 designed in series. The double-acting cylinder 2 includes a front cover 201 and a rear cover 202. A cylinder barrel 203 is provided between the front cover 201 and the rear cover 202. A piston rod A204 is provided inside the cylinder barrel 203, and a piston A205 is provided on the piston rod A204. An air inlet 206 is provided on the front cover 201 and the rear cover 202 respectively. The single-acting small hydraulic cylinder 1 includes a small hydraulic cylinder housing 101 disposed on the rear cover 202. A piston rod B102 is provided inside the small hydraulic cylinder housing 101, and a piston B103 is provided on the piston rod B102. A through hole 207 for the piston rod B102 to pass through is provided on the rear cover 202. An oil inlet 104 is provided on the rear side wall of the small hydraulic cylinder housing 101. By integrating a single-acting hydraulic cylinder 1 with a double-acting pneumatic cylinder 2, the hydraulic cylinder and the pneumatic cylinder work together to increase the ejection force when the workpiece needs to be loosened. Once the workpiece is loosened, the pneumatic cylinder alone can quickly eject it. This design satisfies both the large ejection force required for loosening the workpiece and the speed required for ejection. The overall structure is compact and highly efficient.

[0029] The front cover 201 and the rear cover 202 are connected by four countersunk bolts 2088, and each countersunk bolt 208 is equipped with a locking nut 209. The front cover 201, cylinder 203 and rear cover 202 are firmly and reliably connected by the countersunk bolts 208 and the locking nuts 209.

[0030] The small hydraulic cylinder housing 101 includes an outer shell 105. The front end of the outer shell 105 has a plurality of threaded holes A106 evenly spaced along its circumference. Correspondingly, the rear end cover 202 has a plurality of mounting holes A107. Screws A108 are installed in the mounting holes A107 to fasten the outer shell 105 to the rear end cover 202. A lifting ring 109 is provided at the rear end of the outer shell 105. An mounting groove 110 is provided on the inner wall of the outer shell 105, and an inner cylinder 111 is housed within the mounting groove 110. A sealing ring 112 is provided between the inner cylinder 111 and the outer shell 105. The piston B103 is slidably disposed within the inner cylinder 111. A guide seat 113 is threadedly connected to the inner wall of the front end of the inner cylinder 111. A guide hole 114 is provided within the guide seat 113, and the piston rod B102 passes through the guide hole 114. The specific structure of the small hydraulic cylinder housing 101 is given, and the movement of the piston rod B is guided.

[0031] like Figure 6-7 As shown, an ejection device for a press includes a gas-liquid ejection cylinder as described above. The lifting ring 109 of the gas-liquid ejection cylinder is connected to a lifting lug 3. The lifting lug 3 is bolted to the side wall of a press base 4. A lower ejection mechanism 5 is provided on the press base 4. The connecting lug 6 in the lower ejection mechanism 5 is connected to a piston rod connector 7 via a pin. The piston rod connector 7 is threadedly connected to the piston rod A204. The lower ejection mechanism 5 here is an existing component in the press (its structure can be referenced in the appendix). Figure 7 (This will not be elaborated upon here.)

[0032] Or, such as Figure 8-9 As shown, the front end cover 201 of the gas-liquid ejection cylinder has multiple evenly spaced mounting holes B8, and the lower end of the press base 4 has multiple threaded holes B9. The gas-liquid ejection cylinder is fixed to the press base 4 by installing screws B10 between the mounting holes B8 and the threaded holes B9. Two application methods of the gas-liquid ejection cylinder and the corresponding ejection devices are given. In practical applications, the appropriate device can be selected according to the workpiece.

[0033] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0034] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A gas-liquid ejector cylinder for a press, characterized by comprising: The system includes a single-acting small hydraulic cylinder and a double-acting cylinder designed in series. The double-acting cylinder includes a front cover and a rear cover, with a cylinder barrel between the front cover and the rear cover. A piston rod A is provided inside the cylinder barrel, and a piston A is provided on the piston rod A. Air inlets are provided on the front cover and the rear cover, respectively. The single-acting small hydraulic cylinder includes a small hydraulic cylinder housing disposed on the rear cover. A piston rod B is provided inside the small hydraulic cylinder housing, and a piston B is provided on the piston rod B. A through hole for the piston rod B to pass through is provided on the rear cover, and an oil inlet is provided on the rear side wall of the small hydraulic cylinder housing.

2. The gas-hydraulic ejector cylinder for a press according to claim 1, characterized in that, The front cover and the rear cover are connected by four countersunk bolts, and the countersunk bolts are equipped with lock nuts.

3. The gas-hydraulic ejector cylinder for a press according to claim 1 or 2, characterized in that The small hydraulic cylinder housing includes an outer shell. The front end of the outer shell has multiple threaded holes A evenly spaced along its circumference. The corresponding rear end cover has multiple mounting holes A. Screws A are installed in the mounting holes A to fasten the outer shell to the rear end cover. A lifting ring is provided at the rear end of the outer shell. An inner cylinder is located on the inner wall of the outer shell. A sealing ring is provided between the inner cylinder and the outer shell. The piston B is slidably disposed within the inner cylinder. A guide seat is threaded onto the inner wall of the front end of the inner cylinder. A guide hole is provided within the guide seat, through which the piston rod B passes.

4. An ejection device for a press, characterized in that Includes the gas-liquid ejection cylinder as described in any one of claims 1-3, wherein the lifting ring of the gas-liquid ejection cylinder is connected to the lifting lug, the lifting lug is installed on the side wall of the press base by bolts, the press base is provided with a lower ejection mechanism, the connecting lug seat in the lower ejection mechanism is connected to the piston rod joint by a pin, and the piston rod joint is threadedly connected to the piston rod A; Alternatively, the front end cover of the gas-liquid ejection cylinder is provided with a plurality of mounting holes B evenly spaced, and the lower end of the corresponding press base is provided with a plurality of threaded holes B. The gas-liquid ejection cylinder is fixed to the press base by installing screws B between the mounting holes B and the threaded holes B.

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