Air cylinder locking mechanism

Abstract

The utility model discloses an air cylinder locking mechanism which comprises an air cylinder body, a first air pipe set, a first one-way valve, a second air pipe set and a second one-way valve. A piston rod, a first air chamber and a second air chamber are arranged in the cylinder body, a piston is arranged on the piston rod and used for separating the first air chamber from the second air chamber, and the piston rod is arranged in the second air chamber and extends out of the cylinder body. The first air pipe set communicates with the first air chamber through the first one-way valve and communicates with the air outlet end of the second one-way valve and the second air chamber. The second air pipe set communicates with the second air chamber through the second one-way valve and communicates with the air outlet end of the first one-way valve and the first air chamber. The first one-way valve and the second one-way valve are arranged between the first air pipe set and the second air pipe set, so that no air flows out of the first air chamber and the second air chamber when power and air are cut off, the piston rod enters a locking state, accurate control over the air cylinder is achieved, and practicability and safety of the air cylinder are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a cylinder locking mechanism. Background Art

[0002] When the existing cylinder accidentally loses power or the air line is cut off, the piston rod will loosen and cannot be stopped at any position in the effective stroke, and precise control cannot be achieved. The loose piston rod can easily cause damage to equipment parts and components, and there are also safety hazards to on-site equipment users. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a cylinder locking mechanism so that when power is cut off and gas is cut off, the piston rod can enter a locking state, thereby improving the practicality and safety of the cylinder.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model embodiment provides a cylinder locking mechanism, comprising:

[0006] A cylinder body, a first air pipe assembly, a first one-way valve, a second air pipe assembly and a second one-way valve;

[0007] The cylinder body is provided with a piston rod, a first air chamber and a second air chamber, the piston rod is provided with a piston, the piston is used to separate the first air chamber and the second air chamber, the piston rod is provided in the second air chamber and extends out of the cylinder body;

[0008] The first air pipe group is connected to the first air chamber through the first one-way valve, and the first air pipe group is connected to the air outlet end of the second one-way valve and the second air chamber; the second air pipe group is connected to the second air chamber through the second one-way valve, and the second air pipe group is connected to the air outlet end of the first one-way valve and the first air chamber;

[0009] When the piston rod is in an extended state, the second air pipe assembly ventilates the first air chamber and conducts the second one-way valve, so that a negative pressure is formed at the outlet end of the second one-way valve, and the gas in the second air chamber flows to the outlet end of the second one-way valve and is discharged through the first air pipe assembly, and the piston moves toward the direction where the second air chamber is located;

[0010] When the piston rod is in a retracted state, the first air pipe assembly ventilates the second air chamber and conducts the first one-way valve, so that a negative pressure is formed at the outlet end of the first one-way valve, and the gas in the first air chamber flows to the outlet end of the first one-way valve and is discharged through the second air pipe assembly, and the piston moves toward the direction where the first air chamber is located;

[0011] When the piston rod is in a locked state, the first air pipe assembly and the second air pipe assembly are cut off from air, and the first one-way valve and the second one-way valve are closed, so that no gas flows out of the first air chamber and the second air chamber.

[0012] In one embodiment, the first air pipe group includes a first three-way piece, a first air pipe, a second air pipe and a first drainage pipe; the first air pipe is connected to the first three-way piece; one end of the second air pipe is connected to the first three-way piece, and the other end is connected to the air outlet end of the second one-way valve and the second air chamber; one end of the first drainage pipe is connected to the first three-way piece, and the other end is connected to the first air chamber through the first one-way valve.

[0013] In one embodiment, the second air pipe group includes a second three-way piece, a third air pipe, a fourth air pipe and a second drainage pipe; the third air pipe is connected to the second three-way piece; one end of the fourth air pipe is connected to the second three-way piece, and the other end is connected to the air outlet end of the first one-way valve and the first air chamber; one end of the second drainage pipe is connected to the second three-way piece, and the other end is connected to the second air chamber through the second one-way valve.

[0014] In one embodiment, the cylinder locking mechanism further includes a reversing valve, and the first air pipe and the third air pipe are both connected to the reversing valve.

[0015] In one embodiment, the reversing valve is provided with an air inlet, an air outlet, a first outlet and a second outlet; the first air pipe is connected to the first outlet; the third air pipe is connected to the second outlet;

[0016] When the piston rod is in an extended state, the air inlet is connected to the second outlet, and the air outlet is connected to the first outlet, so that the second air pipe group inhales air and the first air pipe group exhausts air;

[0017] When the piston rod is in a retracted state, the air inlet is connected to the first outlet, and the air outlet is connected to the second outlet, so that the first air pipe group inhales air and the second air pipe group exhausts air;

[0018] When the piston rod is in a locked state, the air inlet and the air outlet are not connected to the first outlet and the second outlet, so that no gas flows out of the first air pipe group and the second air pipe group.

[0019] In one embodiment, the cylinder locking mechanism further includes a first speed regulating valve and a second speed regulating valve; the first air pipe is connected to the first output port through the first speed regulating valve; and the third air pipe is connected to the second output port through the second speed regulating valve.

[0020] In one embodiment, a muffler is provided on the exhaust port.

[0021] In one embodiment, a sealing plate is provided on the cylinder body, and the piston rod extends out of the cylinder body through the sealing plate.

[0022] In one embodiment, a mounting column is provided on the sealing plate, and the sealing plate is mounted on the cylinder body through the mounting column.

[0023] In one embodiment, a first sealing ring is provided on the outer periphery of the piston.

[0024] The cylinder locking mechanism of the utility model has the following beneficial effects compared with the prior art: by arranging the first one-way valve and the second one-way valve between the first air pipe group and the second air pipe group, no gas flows out of the first air chamber and the second air chamber when the power is cut off and the gas is cut off, and the piston rod enters a locking state, so as to realize precise control of the cylinder, thereby improving the practicality and safety of the cylinder.

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a structural schematic diagram of the cylinder locking mechanism provided by the utility model in which the piston rod is in a retracted state;

[0028] Figure 2 This is a structural schematic diagram of the cylinder locking mechanism provided by the utility model in which the piston rod is in an extended state;

[0029] Figure 3 An exploded schematic diagram of the cylinder locking mechanism provided by the utility model.

[0030] Reference numerals

[0031] 1. Cylinder body; 11. Piston rod; 12. Sealing plate; 121. Mounting column; 2. First air pipe group; 21. First three-way piece; 22. First air pipe; 23. Second air pipe; 24. First drainage pipe; 3. First one-way valve; 4. Second air pipe group; 41. Second three-way piece; 42. Third air pipe; 43. Fourth air pipe; 44. Second drainage pipe; 5. Second one-way valve; 6. Reversing valve; 61. Air inlet; 62. Muffler; 7. First speed regulating valve; 8. Second speed regulating valve. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0039] See also Figures 1 to 3 As shown, the utility model discloses a specific embodiment of a cylinder locking mechanism, comprising: a cylinder body 1, a first air pipe group 2, a first one-way valve 3, a second air pipe group 4 and a second one-way valve 5; a piston rod 11, a first air chamber (not shown in the figure) and a second air chamber (not shown in the figure) are arranged in the cylinder body 1, a piston is arranged on the piston rod 11, the piston is used to separate the first air chamber and the second air chamber, the piston rod 11 is arranged in the second air chamber and extends out of the cylinder body 1; the first air pipe group 2 is connected to the first air chamber through the first one-way valve 3, and the first air pipe group 2 is connected to the air outlet end of the second one-way valve 5 and the second air chamber; the second air pipe group 4 is connected to the second air chamber through the second one-way valve 5, and the second air pipe group 4 is connected to the air outlet end of the first one-way valve 3 and the first air chamber.

[0040] When the piston rod 11 is in an extended state, the second air pipe group 4 ventilates the first air chamber and makes the second one-way valve 5 conductive, so that a negative pressure is formed at the air outlet end of the second one-way valve 5. The gas in the second air chamber flows to the air outlet end of the second one-way valve 5 and is discharged through the first air pipe group 2, and the piston moves in the direction of the second air chamber.

[0041] When the piston rod 11 is in a retracted state, the first air pipe group 2 ventilates the second air chamber and makes the first one-way valve 3 conductive, so that a negative pressure is formed at the air outlet end of the first one-way valve 3. The gas in the first air chamber flows to the air outlet end of the first one-way valve 3 and is discharged through the second air pipe group 4, and the piston moves in the direction of the first air chamber.

[0042] When the piston rod 11 is in a locked state, the first air pipe group 2 and the second air pipe group 4 are cut off, and the first one-way valve 3 and the second one-way valve 5 are closed, so that no gas is discharged from the first air chamber and the second air chamber.

[0043] In the embodiment of the utility model, a first one-way valve 3 and a second one-way valve 5 are provided between the first air pipe group 2 and the second air pipe group 4, so that when the power is cut off and the gas is cut off, the first one-way valve 3 and the second one-way valve 5 are immediately closed, and the air pressure difference between the first air chamber and the first one-way valve 3 disappears, and the air pressure difference between the second air chamber and the second one-way valve 5 disappears, so that the gas in the first air chamber and the second air chamber can no longer flow into the second air pipe group 4 and the first air pipe group 2, that is, the piston and the piston rod 11 enter a locked state, so as to realize precise control of the cylinder, thereby improving the practicality and safety of the cylinder.

[0044] In a specific embodiment, the first air pipe group 2 includes a first three-way piece 21, a first air pipe 22, a second air pipe 23 and a first drainage pipe 24; the first air pipe 22 is connected to the first three-way piece 21; one end of the second air pipe 23 is connected to the first three-way piece 21, and the other end is connected to the air outlet end of the second one-way valve 5 and the second air chamber; one end of the first drainage pipe 24 is connected to the first three-way piece 21, and the other end is connected to the first air chamber through the first one-way valve 3.

[0045] In a specific embodiment, the second air pipe group 4 includes a second three-way piece 41, a third air pipe 42, a fourth air pipe 43 and a second drainage pipe 44; the third air pipe 42 is connected to the second three-way piece 41; one end of the fourth air pipe 43 is connected to the second three-way piece 41, and the other end is connected to the air outlet end of the first one-way valve 3 and the first air chamber; one end of the second drainage pipe 44 is connected to the second three-way piece 41, and the other end is connected to the second air chamber through the second one-way valve 5.

[0046] Specifically, see Figure 2 When the piston rod 11 needs to be extended, the high-pressure gas flows into the third air pipe 42 and the second three-way piece 41 and is divided into two paths. One path flows into the fourth air pipe 43 to enter the first air chamber, and the other path flows into the second drainage pipe 44 to make the second one-way valve 5 conductive, forming a negative pressure at the outlet end of the second one-way valve 5. The gas in the second air chamber flows to the outlet end of the second one-way valve 5 and flows out through the second air pipe 23 and the first air pipe 22, so that the piston moves in the direction of the second air chamber, and the piston rod 11 extends.

[0047] See also Figure 1When the piston rod 11 needs to be retracted, the high-pressure gas flows into the first air pipe 22 and the first three-way piece 21 and is divided into two paths. One path flows into the second air pipe 23 to enter the second air chamber, and the other path flows into the first drainage pipe 24 to make the first one-way valve 3 conductive, forming a negative pressure at the outlet end of the first one-way valve 3. The gas in the first air chamber flows to the outlet end of the first one-way valve 3 and flows out through the fourth air pipe 43 and the third air pipe 42, so that the piston moves in the direction of the first air chamber, and the piston rod 11 retracts.

[0048] When it is necessary to lock the piston rod 11 or to cut off the power and air, the first one-way valve 3 and the second one-way valve 5 are both blocked, the air pressure difference between the first air chamber and the first one-way valve 3 disappears, and the air pressure difference between the second air chamber and the second one-way valve 5 disappears, so that the gas in the first air chamber and the second air chamber can no longer flow into the fourth air pipe 43 and the second air pipe 23, and the piston and the piston rod 11 enter a locked state.

[0049] In a specific embodiment, the cylinder locking mechanism further includes a reversing valve 6 , and the first air pipe 22 and the third air pipe 42 are both connected to the reversing valve 6 .

[0050] Specifically, the reversing valve 6 is provided with an air inlet 61, an exhaust port (not shown in the figure), a first output port (not shown in the figure) and a second output port (not shown in the figure); the first air pipe 22 is connected to the first output port; the third air pipe 42 is connected to the second output port.

[0051] When the piston rod 11 is in the extended state, the air inlet 61 is connected to the second outlet, and the air outlet is connected to the first outlet, so that the second air pipe group 4 takes in air and the first air pipe group 2 discharges air.

[0052] When the piston rod 11 is in the retracted state, the air inlet 61 is connected to the first outlet, and the air outlet is connected to the second outlet, so that the first air pipe group 2 takes in air and the second air pipe group 4 discharges air.

[0053] When the piston rod 11 is in a locked state, the air inlet 61 and the air outlet are not connected to the first outlet and the second outlet, so that no gas is discharged from the first air pipe group 2 and the second air pipe group 4.

[0054] More specifically, the air inlet 61 is used to introduce high-pressure gas and guide the high-pressure gas to the first output port or the second output port, and the exhaust port is used to discharge the high-pressure gas that flows back through the first output port or the second output port. By controlling the reversing valve 6, the piston rod 11 can be freely switched between the extended state, the retracted state, and the locked state, so as to realize the precise control of the cylinder.

[0055] In a specific embodiment, the cylinder locking mechanism further includes a first speed regulating valve 7 and a second speed regulating valve 8; the first air pipe 22 is connected to the first output port through the first speed regulating valve 7; the third air pipe 42 is connected to the second output port through the second speed regulating valve 8.

[0056] Specifically, the first speed regulating valve 7 and the second speed regulating valve 8 can control the flow of high-pressure gas in the first air pipe 22 and the third air pipe 42 to control the movement speed of the piston rod 11 .

[0057] In a specific embodiment, a muffler 62 is provided on the exhaust port.

[0058] Specifically, the muffler 62 can greatly reduce the noise generated when exhaust is discharged from the exhaust port.

[0059] In a specific embodiment, a first sealing ring (not shown in the figure) is provided on the outer periphery of the piston.

[0060] Specifically, the first sealing ring is used to seal the first air chamber and the second air chamber to prevent gas from flowing between the first air chamber and the second air chamber.

[0061] In a specific embodiment, a sealing plate 12 is provided on the cylinder body 1 , and the piston rod 11 extends out of the cylinder body 1 through the sealing plate 12 .

[0062] Specifically, a mounting column 121 is provided on the sealing plate 12 , and the sealing plate 12 is mounted on the cylinder body 1 via the mounting column 121 , so as to facilitate the installation of the sealing plate 12 .

[0063] More specifically, a second sealing ring (not shown in the figure) is provided on the sealing plate 12 , and the second sealing ring is sleeved on the piston rod 11 ; the second sealing ring is used to prevent the gas in the second air chamber from overflowing through the sealing plate 12 .

[0064] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A cylinder locking mechanism, characterized in that: include: A cylinder body, a first air pipe assembly, a first one-way valve, a second air pipe assembly and a second one-way valve; The cylinder body is provided with a piston rod, a first air chamber and a second air chamber, the piston rod is provided with a piston, the piston is used to separate the first air chamber and the second air chamber, the piston rod is provided in the second air chamber and extends out of the cylinder body; The first air pipe group is connected to the first air chamber through the first one-way valve, and the first air pipe group is connected to the air outlet end of the second one-way valve and the second air chamber; the second air pipe group is connected to the second air chamber through the second one-way valve, and the second air pipe group is connected to the air outlet end of the first one-way valve and the first air chamber; When the piston rod is in an extended state, the second air pipe assembly ventilates the first air chamber and conducts the second one-way valve, so that a negative pressure is formed at the outlet end of the second one-way valve, and the gas in the second air chamber flows to the outlet end of the second one-way valve and is discharged through the first air pipe assembly, and the piston moves toward the direction where the second air chamber is located; When the piston rod is in a retracted state, the first air pipe assembly ventilates the second air chamber and conducts the first one-way valve, so that a negative pressure is formed at the outlet end of the first one-way valve, and the gas in the first air chamber flows to the outlet end of the first one-way valve and is discharged through the second air pipe assembly, and the piston moves toward the direction where the first air chamber is located; When the piston rod is in a locked state, the first air pipe assembly and the second air pipe assembly are cut off from air, and the first one-way valve and the second one-way valve are closed, so that no gas flows out of the first air chamber and the second air chamber.

2. The cylinder locking mechanism according to claim 1, characterized in that: The first air pipe group includes a first three-way piece, a first air pipe, a second air pipe and a first drainage pipe; the first air pipe is connected to the first three-way piece; one end of the second air pipe is connected to the first three-way piece, and the other end is connected to the air outlet end of the second one-way valve and the second air chamber; one end of the first drainage pipe is connected to the first three-way piece, and the other end is connected to the first air chamber through the first one-way valve.

3. The cylinder locking mechanism according to claim 2, characterized in that: The second air pipe group includes a second three-way piece, a third air pipe, a fourth air pipe and a second drainage pipe; the third air pipe is connected to the second three-way piece; one end of the fourth air pipe is connected to the second three-way piece, and the other end is connected to the air outlet end of the first one-way valve and the first air chamber; one end of the second drainage pipe is connected to the second three-way piece, and the other end is connected to the second air chamber through the second one-way valve.

4. The cylinder locking mechanism according to claim 3, characterized in that: The cylinder locking mechanism also includes a reversing valve, and the first air pipe and the third air pipe are both connected to the reversing valve.

5. The cylinder locking mechanism according to claim 4, characterized in that: The reversing valve is provided with an air inlet, an air outlet, a first outlet and a second outlet; the first air pipe is connected to the first outlet; the third air pipe is connected to the second outlet; When the piston rod is in an extended state, the air inlet is connected to the second outlet, and the air outlet is connected to the first outlet, so that the second air pipe group inhales air and the first air pipe group exhausts air; When the piston rod is in a retracted state, the air inlet is connected to the first outlet, and the air outlet is connected to the second outlet, so that the first air pipe group inhales air and the second air pipe group exhausts air; When the piston rod is in a locked state, the air inlet and the air outlet are not connected to the first outlet and the second outlet, so that no gas flows out of the first air pipe group and the second air pipe group.

6. The cylinder locking mechanism according to claim 5, characterized in that: The cylinder locking mechanism further includes a first speed regulating valve and a second speed regulating valve; the first air pipe is connected to the first output port through the first speed regulating valve; and the third air pipe is connected to the second output port through the second speed regulating valve.

7. The cylinder locking mechanism according to claim 5, characterized in that: The exhaust port is provided with a muffler.

8. The cylinder locking mechanism according to claim 1, wherein a sealing plate is provided on the cylinder body, and the piston rod extends out of the cylinder body through the sealing plate.

9. The cylinder locking mechanism according to claim 8, characterized in that: The sealing plate is provided with a mounting column, and the sealing plate is mounted on the cylinder body through the mounting column.

10. The cylinder locking mechanism according to claim 1, characterized in that: A first sealing ring is arranged on the outer periphery of the piston.

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