Machine rapid return system

Abstract

A machine tool rapid return system includes a movable platform; a pair of buffer cylinder assemblies, each having a buffer cylinder, a buffer piston, and a buffer connecting rod connected to the buffer piston and the movable platform; each buffer cylinder has an oil suction port and an oil discharge port; an oil suction pipe connecting the oil suction port of the pair of buffer cylinder assemblies to an oil tank, capable of drawing oil into the buffer piston of the buffer cylinder assembly; an oil discharge pipe connecting the oil discharge port of the pair of buffer cylinder assemblies to the oil tank; a lifting cylinder assembly located in the middle of the pair of buffer cylinder assemblies; the lifting cylinder assembly having a lifting cylinder, a lifting piston, and a lifting connecting rod connected to the movable platform; the lifting cylinder having a first inlet / outlet port; and a lifting pipe connecting the first inlet / outlet port of the lifting cylinder assembly to a pneumatic hydraulic source, capable of pushing the lifting piston of the lifting cylinder assembly. Another machine tool rapid return system integrates the buffer cylinder assemblies into one, with the lifting cylinder assembly located within the buffer cylinder assembly.

Description

Technical Field

[0001] This invention relates to lifting technology, and in particular to a rapid return system for a machine platform, which enables faster lifting. Prior Technology

[0002] Known machine tool rapid return systems, such as the Taiwan-announced M307520 punch press and its energy feedback hydraulic die pad device, have overly complex structures or require other power sources, which may interfere with each other and affect the lifting speed; or they may require more or larger components to achieve the desired result. Therefore, the shortcomings of conventional machine tool rapid return systems still need to be improved. Summary of the Invention

[0003] In view of the above-mentioned deficiencies of the prior art, the main objective of the present invention is to provide a machine tool rapid return system, which achieves the effect of enabling the machine tool to rise more quickly by reconfiguring components such as hydraulic cylinders and hydraulic circuits.

[0004] To achieve the above objectives, the present invention provides a machine tool rapid return system, comprising: a movable platform; a pair of buffer cylinder assemblies, each having a buffer cylinder, a buffer piston, and a buffer connecting rod connected to the buffer piston and the movable platform; each buffer cylinder having an oil suction port and an oil discharge port; an oil suction pipe connecting the oil suction port of the pair of buffer cylinder assemblies to an oil tank, capable of sucking oil into the buffer piston of the buffer cylinder assembly; an oil discharge pipe connecting the oil discharge port of the pair of buffer cylinder assemblies to the oil tank; a lifting cylinder assembly located in the middle of the pair of buffer cylinder assemblies; the lifting cylinder assembly having a lifting cylinder, a lifting piston, and a lifting connecting rod connected to the movable platform; the lifting cylinder having a first inlet / outlet port; and a lifting pipe connecting the first inlet / outlet port of the lifting cylinder assembly to an air-hydraulic pressure source, capable of pushing the lifting piston of the lifting cylinder assembly.

[0005] By positioning the single lifting cylinder assembly in the middle of the pair of buffer cylinder assemblies, the movable platform is driven to achieve a better level of balance. The lifting cylinder assembly has a smaller capacity and can be quickly filled with oil, which drives the pair of buffer cylinder assemblies to draw in oil, allowing the movable platform to return to the top dead center more quickly.

[0006] Preferably, the oil suction line has a one-way valve, a manual pressure relief valve and an automatic pressure relief valve; the oil discharge line has a pressure regulating valve and a first cooler.

[0007] Preferably, the lifting pipeline is equipped with an accumulator, a flow valve, a second cooler, and a solenoid valve to control the timing of the delayed ascent of the lifting cylinder assembly.

[0008] Preferably, the lifting cylinder of the lifting cylinder assembly also has a second inlet / outlet located at the opposite end of the first inlet / outlet, and the second inlet / outlet is connected to an air pressure source or a hydraulic pressure source.

[0009] To achieve the above objectives, the present invention further provides a machine tool rapid return system, comprising a buffer cylinder assembly, having a buffer cylinder and a buffer piston; the buffer cylinder having an oil suction port and an oil discharge port; an oil suction pipe connecting the oil suction port of the buffer cylinder assembly to an oil tank, capable of sucking oil into the buffer piston of the buffer cylinder assembly; an oil discharge pipe connecting the oil discharge port of the buffer cylinder assembly to the oil tank; a lifting cylinder assembly disposed within the buffer cylinder assembly; the lifting cylinder assembly having a lifting cylinder and a lifting piston connected to the buffer piston; the lifting cylinder having a first inlet / outlet port; a lifting pipe connecting the first inlet / outlet port of the lifting cylinder assembly to an air-hydraulic pressure source, capable of pushing the lifting piston of the lifting cylinder assembly.

[0010] Preferably, the buffer piston of the buffer cylinder assembly and the lifting piston of the lifting cylinder assembly are integrated.

[0011] Preferably, the lifting cylinder also has a second inlet / outlet port, which is connected to a movable, sealed chamber formed by the lifting cylinder and the lifting piston, and the second inlet / outlet port is connected to an air pressure source or a hydraulic pressure source.

[0012] Preferably, the lifting cylinder has a body and a head, and the second inlet / outlet is through the head and body of the lifting cylinder to form the movable, sealed chamber with the lifting piston.

[0013] Preferably, the oil suction line has a one-way valve, a manual pressure relief valve and an automatic pressure relief valve; the oil discharge line has a pressure regulating valve and a first cooler.

[0014] Preferably, the lifting pipeline is equipped with an accumulator, a flow valve, a second cooler, and a solenoid valve to control the timing of the delayed ascent of the lifting cylinder assembly. Simple Explanation of the Diagram

[0015] Figure 1 is a schematic diagram of a preferred embodiment of the present invention. Figure 2 is a schematic diagram of another preferred embodiment of the present invention. Figure 3 is a schematic diagram of another preferred embodiment of the present invention, showing another operating state. Figure 4 is a schematic diagram of another preferred embodiment of the present invention, showing another operating state. Figure 5 is a schematic diagram of the configuration of another preferred embodiment of the present invention. Figure 6 is a schematic diagram of another preferred embodiment of the present invention, showing another operating state. Figure 7 is a schematic diagram of the configuration of another preferred embodiment of the present invention, showing another operating state. Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] As shown in Figure 1, a preferred embodiment of the present invention provides a machine tool rapid return system, for example, for a punch press, comprising:

[0018] An active platform (10) is set at a predetermined position on the machine.

[0019] A pair of buffer cylinder groups (20) each has a buffer cylinder (21), a buffer piston (22), and a buffer connecting rod (23) connected to the buffer piston (22) and the movable table (10); each buffer cylinder (21) has an oil suction hole (24) and an oil discharge hole (25).

[0020] An oil suction pipe (30) connects the oil suction port (24) of the pair of buffer cylinder groups (20) to an oil tank (40), which can suck oil into the buffer piston (22) of the buffer cylinder group (20).

[0021] In this embodiment, the oil suction line (30) has a one-way valve (31).

[0022] In this embodiment, the oil suction line (30) has a manual pressure relief valve (32) and an automatic pressure relief valve (33).

[0023] A row of oil lines (50) connects the drain hole (25) of the pair of buffer cylinder groups (20) to the oil tank (40).

[0024] In this embodiment, the oil drain line (50) has a pressure regulating valve (51).

[0025] In this embodiment, a first cooler (52) is installed in the oil drain line (50).

[0026] A lifting cylinder assembly (60) is located in the middle of the pair of buffer cylinder assemblies (20); the lifting cylinder assembly (60) has a lifting cylinder (61), a lifting piston (62), and a lifting connecting rod (63) connected to the movable platform (10); in addition, the lifting cylinder (61) has a first inlet / outlet hole (64) located in the opposite direction to the lifting connecting rod (63).

[0027] In this embodiment, the lifting cylinder (61) of the lifting cylinder assembly (60) also has a second inlet / outlet (65) located at the opposite end of the first inlet / outlet (64). The second inlet / outlet (65) is connected to an air pressure source or a hydraulic pressure source to provide for the rapid descent of the lifting piston (62). However, the second inlet / outlet (65) may not necessarily be required.

[0028] A lifting pipe (70) is connected to the first inlet / outlet (64) of the lifting cylinder assembly (60), which can push the lifting piston (62) of the lifting cylinder assembly (60) and lift the movable platform (10) and the buffer piston (22) of the pair of buffer cylinder assemblies (20) around it.

[0029] In this embodiment, the booster pipe (70) is equipped with an accumulator (71).

[0030] In this embodiment, the riser pipe (70) is equipped with a flow valve (72).

[0031] In this embodiment, a second cooler (73) is installed in the riser pipe (70).

[0032] In this embodiment, the lifting pipeline (70) is also equipped with a solenoid valve (74) to control the time point of the delayed ascent of the lifting cylinder assembly (60).

[0033] A hydraulic power source (80) can push the lifting piston (62) of the lifting cylinder assembly (60).

[0034] In this embodiment, the air-hydraulic pressure source (80) is an air-hydraulic high-pressure barrel air pressure source. The air-hydraulic pressure source (80) is generally similar to the structure of various buffer cylinders (30) described in Taiwan Patent No. 202012807, and will not be described in detail here.

[0035] By placing the single lifting cylinder assembly (60) in the middle of the pair of buffer cylinder assemblies (20), the lifting cylinder assembly (60) can be quickly filled with oil, driving the pair of buffer cylinder assemblies (20) to suck in oil, so that the movable platform (10) can return to the top dead center more quickly.

[0036] That is, the small single oil cylinder in the middle is active, high pressure, small size, can quickly fill oil to push the movable table (10) to achieve a better level accuracy, drive the surrounding large oil cylinder to suck oil back to the top dead center, and wait for stamping.

[0037] The pressure plate then returns the oil to store energy, which is then fed back to the next cycle; during stamping, the large cylinder on the shaft acts as a buffer in conjunction with the pressure regulating valve.

[0038] As shown in Figures 2 to 4, another preferred embodiment of the present invention provides a machine tool rapid return system, which is developed from the concept of integrating the structures of the first embodiment, and includes:

[0039] A buffer cylinder assembly (20) has a buffer cylinder (21) and a buffer piston (22); the buffer cylinder (21) has an oil suction hole (24) and an oil discharge hole (25).

[0040] An oil suction pipe (30) connects the oil suction port (24) of the buffer cylinder assembly (20) to an oil tank (40), which can suck oil into the buffer piston (22) of the buffer cylinder assembly (20).

[0041] A row of oil lines (50) connects the oil drain hole (25) of the buffer cylinder assembly (20) to the oil tank (40).

[0042] A lifting cylinder assembly (60) is disposed within the buffer cylinder assembly (20); the lifting cylinder assembly (60) has a lifting cylinder (61) and a lifting piston (62) connected to the buffer piston (22); the lifting cylinder (61) has a first inlet / outlet hole (64).

[0043] A lifting pipe (70) connects the first inlet / outlet (64) of the lifting cylinder assembly (60) to a hydraulic power source (80), which can push the lifting piston (62) of the lifting cylinder assembly (60).

[0044] The buffer piston (22) of the buffer cylinder group (20) and the lifting piston (62) of the lifting cylinder group (60) are integrated to simplify the design. However, this invention is not limited to this, and the buffer piston (22) and the lifting piston (62) can also be two separate components.

[0045] The buffer piston (22) can be connected to the movable platform of the aforementioned embodiment, or the lifting piston (62) can be connected to the movable platform, or the buffer piston (22) and the lifting piston (62) can be connected to the movable platform together; or the buffer piston (22) can be directly used as the movable platform, or the lifting piston (62) can be directly used as the movable platform; of course, the buffer connecting rod and the lifting connecting rod of the aforementioned embodiment can also be used.

[0046] This embodiment also includes the components in each pipeline, and is generally the same as the previous embodiment, so it will not be described in detail again; thereby, this embodiment also achieves the purpose of the present invention.

[0047] In this example, the lift line (70) has a pressure regulating valve (51) connected in parallel with the accumulator (71) to improve regulation, but the present invention does not limit it to a necessary component; similarly, the lift line (70) in the previous embodiment can also be equipped with the same pressure regulating valve (51).

[0048] As shown in Figures 5 to 7, a machine tool rapid return system provided in another preferred embodiment of the present invention is derived from the previous embodiment. The main difference between the two embodiments is as follows:

[0049] The lifting cylinder (61) has a body (611) and a head (612), the outer diameter of the head (612) of the lifting cylinder (61) being larger than the outer diameter of the body (611).

[0050] The lifting cylinder (61) also has a second inlet / outlet (65), which is connected to the head (612) and body (611) of the lifting cylinder (61) to form the movable sealed chamber with the lifting piston (62). The second inlet / outlet (65) is connected to an air pressure source or a hydraulic pressure source, which can push the lifting piston (62) down.

[0051] However, the present invention does not limit the shape or structural configuration of the lifting cylinder (61) having a body (611) and a head (612). The second inlet and outlet hole (65) can also push the lifting piston (62) down as long as it is connected to the movable sealed chamber formed by the lifting cylinder (61) and the lifting piston (62).

[0052] The two embodiments described above are derived from the concept of integrating the structure of the first embodiment, and therefore should belong to the same invention and can both be covered by this invention.

[0053] In addition to the above implementations, the present invention can also be implemented as follows:

[0054] For example, in addition to being an air-hydraulic high-pressure tank air-hydraulic source as mentioned above, the air-hydraulic source (80) can also be a power-type oil tank (not shown).

[0055] In summary, the machine rapid return system of the present invention can quickly fill the oil with its lifting cylinder group (60), thereby driving the buffer cylinder group (20) to suck in oil, so that the moving table (10) can return to the top dead center more quickly, thus achieving the purpose of the present invention.

[0056] (10): Activity table (20): Buffer cylinder assembly (21): Buffer cylinder (22): Buffer piston (23): Buffer rod (24): Oil suction hole (25): Oil drain hole (30): Oil suction line (31): Check valve (32): Manual pressure relief valve (33): Automatic pressure relief valve (40): Fuel tank (50): Oil drain line (51): Pressure regulating valve (52): First cooler (60): Lifting cylinder assembly (61): Lifting cylinder (611): Body (612): Head (62): Lift the piston (63): Lifting the connecting rod (64): First inlet / outlet hole (65): Second inlet / outlet hole (70): Uplift pipeline (71): Accumulator (72): Flow valve (73): Second cooler (74): Solenoid valve (80): Pneumatic / hydraulic power source

Claims

1. A machine tool rapid return system, comprising: a movable table (10); a pair of buffer cylinder assemblies (20), each having a buffer cylinder (21), a buffer piston (22), and a buffer connecting rod (23) connected to the buffer piston (22) and the movable table (10); each buffer cylinder (21) having an oil suction hole (24) and an oil discharge hole (25); an oil suction pipe (30) connecting the oil suction hole (24) of the pair of buffer cylinder assemblies (20) to an oil tank (40), capable of sucking oil into the buffer piston (22) of the buffer cylinder assembly (20); and an oil discharge pipe (50) connecting the oil discharge hole (25) of the pair of buffer cylinder assemblies (20) to the oil tank (40). A lifting cylinder assembly (60) is located in the middle of the pair of buffer cylinder assemblies (20); the lifting cylinder assembly (60) has a lifting cylinder (61), a lifting piston (62), and a lifting connecting rod (63) connected to the movable platform (10); the lifting cylinder (61) has a first inlet / outlet hole (64); a lifting pipe (70) connects the first inlet / outlet hole (64) of the lifting cylinder assembly (60) to a pneumatic hydraulic source (80), which can push the lifting piston (62) of the lifting cylinder assembly (60).

2. The machine quick return system as claimed in claim 1, wherein the oil suction line (30) has a one-way valve (31), a manual pressure relief valve (32) and an automatic pressure relief valve (33); the oil discharge line (50) has a pressure regulating valve (51) and a first cooler (52).

3. The machine quick return system as claimed in claim 1, wherein the lifting pipeline (70) is provided with an accumulator (71), a flow valve (72), a second cooler (73), and a solenoid valve (74) to control the time point of delayed ascent of the lifting cylinder assembly (60).

4. The machine quick return system as claimed in claim 1, wherein the lifting cylinder (61) of the lifting cylinder group (60) further has a second inlet / outlet (65) located at the opposite end of the first inlet / outlet (64), and the second inlet / outlet (65) is connected to an air pressure source or a hydraulic pressure source.

5. A machine tool rapid return system, comprising: a buffer cylinder assembly (20) having a buffer cylinder (21) and a buffer piston (22); the buffer cylinder (21) having an oil suction hole (24) and an oil discharge hole (25); an oil suction pipe (30) connecting the oil suction hole (24) of the buffer cylinder assembly (20) to an oil tank (40), capable of sucking oil into the buffer piston (22) of the buffer cylinder assembly (20); an oil discharge pipe (50) connecting the oil discharge hole (25) of the buffer cylinder assembly (20) to the oil tank (40); a lifting cylinder assembly (60) disposed within the buffer cylinder assembly (20); the lifting cylinder assembly (60) having a lifting cylinder (61) and a lifting piston (62) connected to the buffer piston (22); the lifting cylinder (61) having a first inlet / outlet hole (64); A lifting pipe (70) connects the first inlet / outlet (64) of the lifting cylinder assembly (60) to a hydraulic power source (80), which can push the lifting piston (62) of the lifting cylinder assembly (60).

6. The machine quick return system as claimed in claim 5, wherein the buffer piston (22) of the buffer cylinder group (20) and the lifting piston (62) of the lifting cylinder group (60) are integrated.

7. The machine quick return system as claimed in claim 5, wherein the lifting cylinder (61) further has a second inlet / outlet (65) that is connected to a movable sealed chamber formed by the lifting cylinder (61) and the lifting piston (62), and the second inlet / outlet (65) is connected to an air pressure source or a hydraulic pressure source.

8. The machine quick return system as claimed in claim 7, wherein the lifting cylinder (61) has a body (611) and a head (612), and the second inlet / outlet (65) is connected to the head (612) and body (611) of the lifting cylinder (61) to form the movable sealed chamber with the lifting piston (62).

9. The machine quick return system as claimed in claim 5, wherein the oil suction line (30) has a one-way valve (31), a manual pressure relief valve (32) and an automatic pressure relief valve (33); the oil discharge line (50) has a pressure regulating valve (51) and a first cooler (52).

10. The machine quick return system as claimed in claim 5, wherein the lifting pipeline (70) is provided with an accumulator (71), a flow valve (72), a second cooler (73), and a solenoid valve (74) to control the time point of delayed ascent of the lifting cylinder assembly (60).

Images