Functional module for single-action actuating mechanism

Abstract

The utility model discloses a functional module for a single-action actuating mechanism, which comprises an oil inlet main path and an oil return main path which are both used for being communicated with a rodless cavity of the single-action actuating mechanism, and further comprises a plurality of electromagnetic valves, a plurality of oil inlets of the electromagnetic valves are communicated with the oil inlet main path, and oil outlets of the electromagnetic valves are communicated with the rodless cavity of the single-action actuating mechanism. Oil return ports of the plurality of electromagnetic valves are communicated with the oil return main path; an oil outlet of each electromagnetic valve is connected with inlets of any two different shuttle valves at the same time, so that it is ensured that when any electromagnetic valve is powered off, hydraulic oil normally enters the corresponding two-way valve from each shuttle valve, and control ports of the two-way valves communicate with outlets of the shuttle valves in a one-to-one correspondence mode; and two side ports of the plurality of two-way valves are respectively communicated with the rodless cavity and the oil return main path. According to the utility model, the quick action control of the single-action actuating mechanism is realized through the power loss of any two electromagnetic valves, the loss caused by the fault of a single electromagnetic valve is avoided, and the working stability of the whole functional module is improved.

Description

Technical Field

[0001] This utility model relates to the field of single-acting actuators, and in particular to a functional module for single-acting actuators. Background Technology

[0002] A single-acting actuator, such as a single-acting hydraulic cylinder, includes: a cylinder body, a piston, and a piston rod. The piston rod is housed within the cylinder body. One end of the piston is connected to the piston rod, and the other end extends out of the cylinder body. The oil port of the single-acting hydraulic cylinder is located in the rodless chamber end of the cylinder body. The piston of the hydraulic cylinder extends when oil enters through the oil port and retracts under the action of external force.

[0003] When a single-acting hydraulic cylinder needs to perform rapid action, the hydraulic pressure supply must be cut off promptly. At this time, the single-acting hydraulic cylinder automatically resets using its internal elastic components and discharges the hydraulic oil from the rodless chamber. To ensure timely cutting off of the hydraulic oil supply and timely discharge of hydraulic oil from the rodless chamber and the main inlet line, existing technologies typically include a return line alongside the main inlet line to promptly return the hydraulic oil from the main inlet line and the rodless chamber to the oil tank. A single solenoid valve is installed on the return line to control its opening and closing. The drawback of this approach is that if the single solenoid valve malfunctions and loses power, it may misleadly open the main inlet and return lines, leading to the accidental activation of the single-acting hydraulic cylinder's rapid action, resulting in potential damage. Therefore, the overall system's operational stability is low. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a functional module for a single-acting actuator. By controlling the rapid action of the single-acting actuator with the de-energization of any two solenoid valves, it avoids losses caused by the failure of a single solenoid valve and improves the stability of the entire functional module.

[0005] This utility model is achieved through the following technical solution:

[0006] A functional module for a single-acting actuator includes an oil inlet main line and an oil return main line, both of which are used to connect to the rodless chamber of the single-acting actuator. An elastic element is disposed within the rod-side chamber of the single-acting actuator, with one end of the elastic element abutting against a piston and the other end abutting against the inner wall of the single-acting actuator; it also includes:

[0007] Multiple solenoid valves, including a first solenoid valve, a second solenoid valve, and a third solenoid valve, wherein the oil inlet of each of the multiple solenoid valves is connected to the main oil inlet circuit, and the oil return port of each of the multiple solenoid valves is connected to the main oil return circuit.

[0008] Multiple shuttle valves, including a first shuttle valve, a second shuttle valve and a third shuttle valve, wherein the oil outlet of the first solenoid valve is simultaneously connected to the first inlet of the first shuttle valve and the first inlet of the third shuttle valve, the oil outlet of the second solenoid valve is simultaneously connected to the second inlet of the first shuttle valve and the first inlet of the second shuttle valve, and the oil outlet of the third solenoid valve is simultaneously connected to the second inlet of the second shuttle valve and the second inlet of the third shuttle valve.

[0009] Multiple two-way valves, including a first two-way valve, a second two-way valve, and a third two-way valve, wherein the control port of the first two-way valve is connected to the outlet of the first shuttle valve, the control port of the second two-way valve is connected to the outlet of the third shuttle valve, and the control port of the third two-way valve is connected to the outlet of the second shuttle valve; both side ports of the first two-way valve, the second two-way valve, and the third two-way valve are respectively connected to the main oil inlet line and the main oil return line.

[0010] Furthermore, it also includes an oil inlet branch and an oil return branch, wherein the oil inlet branch is connected to the main oil inlet, the oil return branch is connected to the main oil return, and the oil inlets of the plurality of solenoid valves are all connected to the oil inlet branch, and the oil return ports of the plurality of solenoid valves are all connected to the oil return branch.

[0011] Furthermore, the pipeline distance between the first inlet of the shuttle valve and the oil inlet P of the main oil inlet is not equal to the pipeline distance between the second inlet of the shuttle valve and the oil inlet P of the main oil inlet.

[0012] Furthermore, it also includes a first return oil main line, which is connected to the main oil inlet line. One side port of each of the multiple two-way valves is connected to the first return oil main line, and the other side port of each of the multiple two-way valves is connected to the return oil branch line.

[0013] Furthermore, it also includes a second return oil main, which is simultaneously connected to the other side port of the multiple two-way valves and the return oil branch.

[0014] Furthermore, the first solenoid valve, the second solenoid valve, and the third solenoid valve are all two-position three-way solenoid valves.

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] In the functional module provided in this application, even if a single solenoid valve loses power due to a malfunction, the normal operation of the single-acting actuator can still be guaranteed. Only when two or three solenoid valves malfunction simultaneously will the functional module erroneously start the rapid action of the single-acting actuator. This greatly reduces the probability of erroneous start, avoids losses caused by the malfunction of a single solenoid valve, and improves the stability of the entire rapid function module. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a functional module for a single-acting actuator.

[0018] 1. Main oil inlet line; 11. Branch oil inlet line; 2. Main oil return line; 21. Branch oil return line; 22. First oil return main line; 23. Second oil return main line; 3. Single-acting actuator; 30. Rodless chamber; 31. Rod chamber; 32. Elastic element; 33. Piston; 41. First solenoid valve; 42. Second solenoid valve; 43. Third solenoid valve; 51. First shuttle valve; 52. Second shuttle valve; 53. Third shuttle valve; 61. First two-way valve; 62. Second two-way valve; 63. Third two-way valve. Detailed Implementation

[0019] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] like Figure 1As shown, a functional module for a single-acting actuator according to an embodiment of the present invention includes an oil inlet main line 1 and an oil return main line 2. Both the oil inlet main line 1 and the oil return main line 2 are used to connect to the rodless chamber 30 of the single-acting actuator 3. An elastic element 32 is provided in the rod chamber 31 of the single-acting actuator 3, and one end of the elastic element 32 abuts against the piston 33, and the other end abuts against the inner wall of the single-acting actuator 3. The functional module also includes multiple solenoid valves, multiple shuttle valves, and multiple two-way valves. The multiple solenoid valves include a first solenoid valve 41, a second solenoid valve 42, and a third solenoid valve 43, and the oil inlets of the multiple solenoid valves are all connected to the oil inlet main line 1, and the oil return ports of the multiple solenoid valves are all connected to the oil return main line 2. The multiple shuttle valves include a first shuttle valve 51, a second shuttle valve 52, and a third shuttle valve 53. The first solenoid valve 41... The oil outlet is simultaneously connected to the first inlet of the first shuttle valve 51 and the first inlet of the third shuttle valve 53. The oil outlet of the second solenoid valve 42 is simultaneously connected to the second inlet of the first shuttle valve 51 and the first inlet of the second shuttle valve 52. The oil outlet of the third solenoid valve 43 is simultaneously connected to the second inlet of the second shuttle valve 52 and the second inlet of the third shuttle valve 53. Multiple two-way valves include a first two-way valve 61, a second two-way valve 62, and a third two-way valve 63. The control port of the first two-way valve 61 is connected to the outlet of the first shuttle valve 51. The control port of the second two-way valve 62 is connected to the outlet of the third shuttle valve 53. The control port of the third two-way valve 63 is connected to the outlet of the second shuttle valve 52. The two side ports of the first two-way valve 61, the second two-way valve 62, and the third two-way valve 63 are respectively connected to the main oil inlet line 1 and the main oil return line 2.

[0021] The functional module also includes an oil inlet branch 11 and an oil return branch 21. The oil inlet branch 11 is connected to the main oil inlet 1, and the oil return branch 21 is connected to the main oil return 2. The oil inlets of multiple solenoid valves are connected to the oil inlet branch 11, and the oil return ports of multiple solenoid valves are connected to the oil return branch 21.

[0022] The functional module also includes a first return oil main line 22, which is connected to the main oil inlet line 1. One side port of multiple two-way valves is connected to the first return oil main line 22, and the other side port of multiple two-way valves is connected to the return oil branch line 21.

[0023] The functional module also includes a second return oil main 23, which is connected to the other side port of multiple two-way valves and the return oil branch 21.

[0024] The pipeline distance between the first inlet of the shuttle valve and the inlet P of the main oil inlet line 1 is not equal to the pipeline distance between the second inlet of the shuttle valve and the inlet P of the main oil inlet line 1, so as to avoid the shuttle valve outlet being unable to discharge oil normally due to the simultaneous intake of oil at the two inlets of the same shuttle valve.

[0025] In this embodiment, the first solenoid valve 41, the second solenoid valve 42, and the third solenoid valve 43 are all two-position three-way solenoid valves.

[0026] The working principle of this utility model is as follows:

[0027] Under normal conditions, the first solenoid valve 41, the second solenoid valve 42, and the third solenoid valve 43 are all energized. The hydraulic oil flows through the first solenoid valve 41, the second solenoid valve 42, and the third solenoid valve 43 to the corresponding shuttle valves and flows out from the outlet of the shuttle valves. The hydraulic oil flowing out from the shuttle valves flows to the control ports of the corresponding two-way valves, so that the three two-way valves are in a blocked state, that is, the two side ports of the two-way valves are not connected to each other. At this time, the hydraulic oil enters from the oil inlet P port, passes through the main oil inlet 1, and reaches the rodless chamber 30. The hydraulic oil discharged from the rodless chamber 30 is discharged from the oil inlet P port through the main oil inlet 1.

[0028] When any one of the three solenoid valves is de-energized, hydraulic oil still flows through the three shuttle valves, the three two-way valves remain blocked, the working state of the single-acting actuator 3 remains unchanged, and the single-acting actuator 3 remains in normal working condition.

[0029] When two or more of the three solenoid valves are de-energized, assuming the first solenoid valve 41 and the second solenoid valve 42 are de-energized, hydraulic oil flows out only from the third solenoid valve 43. At this time, only the second shuttle valve 52 and the third shuttle valve 53 connected to the third solenoid valve 43 have hydraulic oil flowing out. At this time, the second two-way valve 62 and the third two-way valve 63 are in a blocked state, and the first two-way valve 61 is in a connected state. At this time, the rodless chamber 30 of the single-acting actuator 3 is connected to the return oil main line 2 through the first two-way valve 61. At this time, the hydraulic oil in the inlet main line 1 and the rodless chamber flows back to the oil tank through the return oil main line 2, so that the single-acting actuator 3 is reset under the action of the internal elastic element 32 and is in a rapid action state.

[0030] The beneficial effects of this utility model are as follows:

[0031] When a single solenoid valve loses power due to a malfunction, the normal operation of the single-acting actuator can still be guaranteed. Only when two or three solenoid valves malfunction simultaneously will the functional module erroneously start the rapid action of the single-acting actuator. This greatly reduces the probability of erroneous start, avoids losses caused by the failure of a single solenoid valve, and improves the stability of the entire rapid function module.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A functional module for a single-acting actuator, comprising an oil inlet main line (1) and an oil return main line (2), wherein both the oil inlet main line (1) and the oil return main line (2) are used to connect to the rodless cavity (30) of the single-acting actuator (3), wherein an elastic element (32) is provided in the rod cavity (31) of the single-acting actuator (3), and one end of the elastic element (32) abuts against a piston (33) and the other end abuts against the inner wall of the single-acting actuator (3); characterized in that, Also includes: Multiple solenoid valves, including a first solenoid valve (41), a second solenoid valve (42), and a third solenoid valve (43), and the oil inlets of the multiple solenoid valves are all connected to the main oil inlet (1), and the oil return ports of the multiple solenoid valves are all connected to the main oil return (2). Multiple shuttle valves, including a first shuttle valve (51), a second shuttle valve (52) and a third shuttle valve (53), wherein the oil outlet of the first solenoid valve (41) is simultaneously connected to the first inlet of the first shuttle valve (51) and the first inlet of the third shuttle valve (53), the oil outlet of the second solenoid valve (42) is simultaneously connected to the second inlet of the first shuttle valve (51) and the first inlet of the second shuttle valve (52), and the oil outlet of the third solenoid valve (43) is simultaneously connected to the second inlet of the second shuttle valve (52) and the second inlet of the third shuttle valve (53); Multiple two-way valves, including a first two-way valve (61), a second two-way valve (62), and a third two-way valve (63), wherein the control port of the first two-way valve (61) is connected to the outlet of the first shuttle valve (51), the control port of the second two-way valve (62) is connected to the outlet of the third shuttle valve (53), and the control port of the third two-way valve (63) is connected to the outlet of the second shuttle valve (52); the two side ports of the first two-way valve (61), the second two-way valve (62), and the third two-way valve (63) are respectively connected to the main oil inlet line (1) and the main oil return line (2).

2. The functional module for a single-acting actuator according to claim 1, characterized in that, It also includes an oil inlet branch (11) and an oil return branch (21), wherein the oil inlet branch (11) is connected to the main oil inlet (1), the oil return branch (21) is connected to the main oil return (2), and the oil inlets of the plurality of solenoid valves are all connected to the oil inlet branch (11), and the oil return ports of the plurality of solenoid valves are all connected to the oil return branch (21).

3. The functional module for a single-acting actuator according to claim 1, characterized in that, The pipeline distance between the first inlet of the shuttle valve and the inlet P of the main oil inlet (1) is not equal to the pipeline distance between the second inlet of the shuttle valve and the inlet P of the main oil inlet (1).

4. The functional module for a single-acting actuator according to claim 2, characterized in that, It also includes a first return oil trunk line (22), which is connected to the main oil inlet line (1), and one side port of each of the multiple two-way valves is connected to the first return oil trunk line (22), and the other side port of each of the multiple two-way valves is connected to the return oil branch line (21).

5. The functional module for a single-acting actuator according to claim 4, characterized in that, It also includes a second return oil main (23), which is connected to the other side port of the plurality of two-way valves and the return oil branch (21).

6. The functional module for a single-acting actuator according to claim 1, characterized in that, The first solenoid valve (41), the second solenoid valve (42) and the third solenoid valve (43) are all two-position three-way solenoid valves.

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