Gas-liquid pressure cylinder with positioning function

Abstract

The utility model belongs to the technical field of pressure cylinders, and particularly relates to a gas-liquid pressure cylinder with a positioning function, which comprises a working cylinder barrel, a middle end cover, a lower end cover, a working piston and a working rod, one end of the pressurizing cylinder barrel is connected with the middle end cover, the pressurizing piston is movably arranged in the pressurizing cylinder barrel, one end of the pressurizing rod is connected with the pressurizing piston, the other end of the pressurizing rod can stretch into the working cylinder barrel through an axial through hole in the middle end cover, and the oil storage barrel is communicated with the interior of the working cylinder barrel through the axial through hole in the middle end cover. The lower end cover is communicated with an external air source; the device further comprises a positioning device. If the working piston needs to stay at any position in the working cylinder barrel during operation, the other end of the pressurizing rod needs to penetrate through the axial through hole and cut off a passage between the working cylinder barrel and the oil storage barrel; therefore, compared with the prior art, the gas-liquid pressure cylinder not only facilitates positioning of the working piston and the working rod, but also avoids potential safety hazards.

Description

Technical Field

[0001] The utility model relates to the technical field of booster cylinders, in particular to a safe and reliable gas-liquid booster cylinder which can enable a working piston to stay at any position in a working cylinder barrel during its return stroke. Background Art

[0002] The gas-liquid booster cylinder is widely used in stamping and punching equipment. It includes a working cylinder and a middle end cover and a lower end cover respectively arranged at both ends thereof, a working piston and a working rod fixedly connected to it at one end, a booster cylinder and a booster piston movably arranged therein, a booster rod connected thereto for boosting, an oil storage cylinder connected to the inside of the working cylinder through the middle end cover, and the other end of the working rod is located outside the working cylinder and a mold clamping movable plate is arranged at this end; the working stroke is as follows: the hydraulic oil in the oil storage cylinder enters the working cylinder through the middle end cover to push the working piston and the working rod to move and complete the mold clamping, and then the upper end cover of the booster cylinder is ventilated to push the booster piston and the booster rod to move, and the free end of the booster rod passes through the inside of the middle end cover The axial perforation enters the working cylinder to complete the boosting operation; return process: the lower end cover vents air into the working cylinder, pushing the working piston and working rod to move in the opposite direction, and the working piston pushes the hydraulic oil to flow into the oil storage cylinder. At the same time, air is ventilated from the middle end cover into the boosting cylinder to make the boosting piston and boosting rod return, and the boosting rod withdraws from the passage connecting the working oil cylinder and the oil storage cylinder in the middle end cover, and the boosting piston and boosting rod, the working piston and working rod return to their original positions, completing a work process; in this process, the working piston returns to its original position, generally referring to the position where the working piston reaches the position abutting the middle end cover (initial position); for some boosting cylinders, the working cylinder is longer, and if each work process, the working activity The return of the piston and the working rod to their initial positions will inevitably lead to a long working stroke and return distance for the two, thereby extending the time of each working process and reducing work efficiency. At present, the solution to this problem is that the lower end cover is connected to the external air source through an air pipe and a three-position five-way center-sealed solenoid valve. During the return process, in order to shorten the return distance of the working piston and the working rod, when the two reach a certain position (height) in the working cylinder, the center-sealed solenoid valve is closed. At this time, the gas enclosed in the working cylinder and located below the working piston supports the working piston to stay in this position, and the exhaust port is closed at the same time. Under ideal conditions, that is, the interfaces where the air pipe is connected to the lower end cover and the solenoid valve are not The air leakage and air pipe are not damaged in this process, and the working piston can stay at any position without returning to the initial position; there is obviously a safety hazard in adopting this structure, because the external air source stops supplying air at this time, and the weight of the mold clamping movable plate, the working rod and the working piston is at least several hundred kilograms. When the air leakage at each interface causes the air pressure enclosed in the working cylinder to be insufficient to support it, the mold clamping movable plate will inevitably fall. If there are workers taking and placing workpieces below it, the workers will be injured. Therefore, the existing structure of staying at any position has a major safety hazard; of course, the external air source can also continue to ventilate the working cylinder, but the air pressure will push the working piston back to the initial position, thereby failing to achieve the effect of staying at any position. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model aims to provide a gas-liquid booster cylinder with a positioning function.

[0004] The technical solution is: a gas-liquid booster cylinder with a positioning function, comprising a working cylinder barrel and a middle end cover and a lower end cover respectively arranged at both ends thereof, a working piston movably arranged in the working cylinder barrel and a working rod fixedly connected to the working piston at one end, a booster cylinder barrel connected to the middle end cover at one end and a booster piston movably arranged therein, a booster rod at one end connected to the booster piston and the other end of which can extend into the working cylinder barrel through an axial through hole in the middle end cover, an oil storage barrel connected to the inside of the working cylinder barrel through the axial through hole in the middle end cover; the lower end cover is connected to an external air source; and also includes a positioning device movably arranged on the booster cylinder barrel; if the working piston needs to stay at any position in the working cylinder barrel during operation, the positioning device pushes the booster piston and the booster rod to move in a direction close to the working cylinder barrel until the other end of the booster rod passes through the axial through hole and cuts off the passage between the working cylinder barrel and the oil storage barrel.

[0005] Furthermore, an upper end cover is provided at the other end of the boost cylinder, and a boost upper cover and a boost middle cover are also provided inside the boost cylinder and both are connected to an external air source; the boost upper cover is located between the boost middle cover and the upper end cover; axial holes are provided in the boost upper cover and the boost middle cover.

[0006] The positioning device includes a positioning piston movably arranged in the boost cylinder and located between the boost upper cover and the upper end cover, and a positioning rod with one end fixedly connected to the positioning piston and the other end capable of passing through an axial hole in the boost upper cover and extending into the space between the boost upper cover and the boost middle cover.

[0007] The boosting piston is located in the space between the boosting upper cover and the boosting middle cover; the other end of the positioning rod is used to push the boosting piston to move towards the direction close to the working cylinder.

[0008] The boosting rod is also sleeved with a boosting auxiliary piston, which is located in the space between the middle end cover and the boosting middle cover.

[0009] The booster upper cover is provided with a return air inlet hole for ventilation to drive the positioning piston to move toward the upper end cover, and a booster air inlet hole for ventilation to drive the booster piston to move toward the booster middle cover.

[0010] The boost middle cover is provided with a return air inlet hole for ventilation to drive the boost piston to move toward the boost upper cover, and a boost air inlet hole for ventilation to drive the boost auxiliary piston to move toward the middle end cover.

[0011] Technical effect: When the gas-liquid booster cylinder of the utility model is used, during operation, the process includes a pressurization process and a return process. The positioning device is started to push the booster piston and the booster rod to move in the direction close to the working cylinder (move downward) until the other end of the booster rod passes through the axial perforation and cuts off the passage between the working cylinder and the oil storage cylinder, so that the working piston stays at any position in the working cylinder; taking the return process as an example, the booster rod withdraws from the passage connecting the working oil cylinder and the oil storage cylinder in the middle end cover, and the external air source inflates the working cylinder through the lower end cover, and the working piston returns upward, pushing the hydraulic oil in the working cylinder to flow back to the oil storage cylinder. In this process, in order to shorten the return distance of the working piston and the working rod, the working piston does not need to return to the initial position in contact with the middle end cover, that is, it stays at any position in the working cylinder as needed. When the pressure relief valve is inflated, the pressure relief valve will be turned off, and the pressure relief valve will be turned off, and the pressure relief valve will be turned off. When the pressure relief valve is turned off, the pressure relief valve will be turned off, and the pressure relief valve will be turned off. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0013] Figure 2 It is a front view of an embodiment of the utility model;

[0014] Figure 3 It is a cross-sectional view of an initial state of an embodiment of the utility model;

[0015] Figure 4 This is a cross-sectional view of a pressurized state of an embodiment of the utility model;

[0016] Figure 5 This is a cross-sectional view of the return state of an embodiment of the utility model;

[0017] Figure 6 A perspective view of another embodiment of the utility model;

[0018] Figure 7 It is a cross-sectional view of another embodiment of the utility model in the initial state;

[0019] Figure 8This is a three-dimensional diagram of the utility model when a three-section gas-liquid booster cylinder is used;

[0020] Fig. 9 This is a cross-sectional view of the initial state when the utility model adopts a three-section gas-liquid booster cylinder. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods.

[0022] like Figure 1-3 As shown, the embodiment of the utility model provides a gas-liquid booster cylinder with a positioning function, which is mainly used for a booster cylinder with a longer working cylinder barrel. It can make the working piston and the working rod stay at any position in the working cylinder barrel according to needs and is safe and reliable, so as to improve work efficiency and eliminate safety hazards; it includes a working cylinder barrel 1 and a middle end cover 2 and a lower end cover 3 respectively arranged at two ends thereof, a working piston 4 movably arranged in the working cylinder barrel 1 and a working rod 5 fixedly connected to the working piston at one end, the other end of the working rod 5 here is located outside the working cylinder barrel 1 and a mold moving plate is provided at this end, a booster cylinder barrel 6 connected to the middle end cover 2 at one end and a booster piston 7 movably arranged therein, a booster rod 8 at one end connected to the booster piston 7 and the other end can be extended into the working cylinder barrel 1 through the axial through hole 201 in the middle end cover 2, and a booster rod 8 through the axial through hole 201 in the middle end cover 1 is an oil storage cylinder 9 connected to the inside of the working cylinder 1; the lower end cover 3 is connected to the external air source, specifically, the lower end cover 3 is connected to the external air source through an air pipe and a center-sealed solenoid valve; it also includes a positioning device 10 movably arranged on the booster cylinder 6; the purpose of setting the positioning device is to position the working piston 4 during the return process so that it stays at any position; that is, if the working piston needs to stay at any position in the working cylinder 1 during operation, the positioning device 10 pushes the booster piston 7 and the booster rod 8 to move in the direction close to the working cylinder 1 until the other end of the booster rod 8 passes through the axial through hole 201 and cuts off the passage between the working cylinder 1 and the oil storage cylinder 9, so that the hydraulic oil cannot return to the oil storage cylinder 9 through the passage, and at this time, the external air source continues to inflate the working cylinder 1 through the lower end cover to push the working piston 4 to stay at this position.

[0023] The gas-liquid booster cylinder in this embodiment is placed upright, that is, the booster cylinder 6 is located above the working cylinder 1, and the clamping movable plate is arranged at the lower end of the working rod 5. Therefore, it is necessary to make the working piston stay at any position in the working cylinder 1 during operation so as to shorten the return distance and the stroke of the next working process, while at the same time eliminating the safety hazard of the working piston, working rod and clamping movable plate falling.

[0024] Furthermore, if Figure 3-5As shown, the other end of the boost cylinder 6 is provided with an upper end cover 11, in which an air inlet hole connected to an external air source is provided. A boost upper cover 12 and a boost middle cover 13 are also provided in the boost cylinder 6, and both are connected to the external air source; the boost upper cover 12 is located between the boost middle cover 13 and the upper end cover 11; and axial holes are provided in the boost upper cover and the boost middle cover.

[0025] Specifically, the positioning device 10 includes a positioning piston 1001 which is movably arranged in the boost cylinder 6 and located between the boost upper cover 12 and the upper end cover 11, a positioning rod 1002 whose one end is fixedly connected to the positioning piston and the other end can pass through the axial hole in the boost upper cover 12 and extend into the space between the boost upper cover 12 and the boost middle cover 13; that is, the axial hole in the boost upper cover 12 is for the movable positioning rod to pass through.

[0026] Specifically, the booster piston 7 is located in the space between the booster upper cover 12 and the booster middle cover 13; the other end of the positioning rod 1002 is used to push the booster piston 7 to move closer to the working cylinder barrel 1. When the gas-liquid booster cylinder is placed upright, the lower end of the positioning rod 1002 is used to push the booster piston 7 downward so as to be closer to the working cylinder barrel 1.

[0027] The boosting rod 8 is also sleeved with a boosting auxiliary piston 14 , which is located in the space between the middle end cover 2 and the boosting middle cover 13 .

[0028] like Figure 3-5 As shown, the boost upper cover 12 is provided with a return air inlet 15 for ventilation to drive the positioning piston 1001 to move toward the upper end cover, and a boost air inlet 16 for ventilation to drive the boost piston 7 to move toward the boost middle cover 13. At the same time, the boost middle cover 13 is provided with a return air inlet 15 for ventilation to drive the boost piston 7 to move toward the boost upper cover 12, and a boost air inlet 16 for ventilation to drive the boost auxiliary piston 14 to move toward the middle end cover.

[0029] With the above structure, in the initial state, the positioning piston 1001 is located below the upper end cover 11 and the two are in contact, and the booster piston 7 is located below the booster upper cover 12 and the two are in contact. During the boosting process, the external air source vents into the booster cylinder 6 through the booster air inlet hole 16 in the booster upper cover 12, driving the booster piston 7 and the booster rod 8 to move downward. At the same time, the booster air inlet hole 16 in the booster middle cover 13 can be used to ventilate into the booster cylinder 6 to drive the booster auxiliary piston 14 to drive the booster rod 8 to move downward. The lower end of the booster rod passes through the middle end cover 2 and enters the working cylinder 1 to complete the boosting. During the boosting process, if the working piston 4 needs to stay at any position of the working cylinder 1, the booster rod 8 can also be driven into the middle end cover 2 to cut off the passage between the working cylinder 1 and the oil storage cylinder 9. At this time, the external air source continuously inflates the working cylinder 1 through the lower end cover to push the working piston 4 (that is, to overcome the gravity of the working piston and related components connected to it), and the working piston 4 can also stay at any position. When the external air source is ventilated to the booster cylinder 6 through the return air inlet 15 in the booster middle cover 13, the booster piston 7 and the booster rod 8 are driven to move upward until the passage between the working cylinder 1 and the oil storage cylinder 9 is connected, and the hydraulic oil returns to the oil storage cylinder 9. When the working piston 4 moves to any position in the working cylinder 1, if it is required, the working piston 4 and the working rod 5 can stay there without continuing to return, and the booster cylinder 6 is inflated through the air inlet hole in the upper end cover 11, driving the positioning piston 10 01. The positioning rod 1002 moves downward and pushes the booster piston 7 and the booster rod 8 to move downward. At the same time, air is ventilated to the booster cylinder 6 through the booster air inlet hole 16 in the booster upper cover 12, so as to drive the booster piston 7 and the booster rod 8 to move downward quickly at the same time. When the booster rod 8 enters the middle end cover 2 to cut off the passage between the working cylinder 1 and the oil storage cylinder 9, the booster rod 8 stops moving downward and the working piston 4 stops moving upward. It stops at any position where it needs to stop, shortening the stroke of the next working process.

[0030] The above embodiment is provided with a booster sub-piston 14 so that "during the boosting process, the external air source vents into the booster cylinder 6 through the booster air inlet hole 16 in the booster upper cover 12, driving the booster piston 7 and the booster rod 8 to move downward. At the same time, the booster air inlet hole 16 in the booster middle cover 13 can be used to ventilate into the booster cylinder 6 to drive the booster sub-piston 14 to drive the booster rod 8 to move downward, and the lower end of the booster rod passes through the middle end cover 2 into the working cylinder 1 to complete the boosting;" that is, the booster cylinder with double-force boosting currently used in the art; that is, the positioning function can be used in the booster cylinder with double-force boosting. Figure 6-7As shown, the positioning function can also be used in a booster cylinder of non-multiplied power. Compared with the aforementioned embodiment, the booster sub-piston 14 is not provided on the booster rod 8 of this embodiment. Therefore, one end of the working cylinder barrel 1 of this embodiment does not need to be provided with a cushioning structure 17 at one end of the working cylinder barrel 1 as in the aforementioned embodiment. Apart from this, this embodiment is exactly the same as the aforementioned embodiment and will not be repeated here.

[0031] In the above two embodiments, the oil storage cylinder 9 adopts a two-section structure, that is, it is divided into two parts, and the two parts are connected by an oil cover. For this reason, the booster cylinder used in the above two embodiments is a four-section booster cylinder. Obviously, the oil storage cylinder 9 can also adopt a one-section structure, that is, the booster cylinder used in the above two embodiments can also be a three-section booster cylinder; Figure 8-9 shown.

[0032] In the above description, it should be noted that the terms "installed", "connected", "connected" and other corresponding terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components; "provided in" should be understood as "installed in, set in", including fixed installation, movable installation and other installation methods.

[0033] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. The preferred embodiments of the utility model are given in the drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Any equivalent structure made by using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the utility model patent.

Claims

1. A gas-liquid booster cylinder with a positioning function, comprising a working cylinder barrel and a middle end cover and a lower end cover respectively arranged at both ends thereof, a working piston movably arranged in the working cylinder barrel and a working rod fixedly connected to the working piston at one end, a booster cylinder barrel connected to the middle end cover at one end and a booster piston movably arranged therein, a booster rod at one end connected to the booster piston and the other end of which can be extended into the working cylinder barrel through an axial through hole in the middle end cover, and an oil storage cylinder connected to the inside of the working cylinder barrel through an axial through hole in the middle end cover; the lower end cover is connected to an external gas source; it is characterized in that It also includes a positioning device movably arranged on the booster cylinder; if the working piston needs to stay at any position in the working cylinder during operation, the positioning device pushes the booster piston and the booster rod to move in a direction close to the working cylinder until the other end of the booster rod passes through the axial through hole and blocks the passage between the working cylinder and the oil storage cylinder.

2. A gas-liquid booster cylinder with positioning function as claimed in claim 1, characterized in that: An upper end cover is provided at the other end of the boost cylinder, and a boost upper cover and a boost middle cover are also provided inside the boost cylinder, and both are connected to an external air source; the boost upper cover is located between the boost middle cover and the upper end cover; axial holes are provided in the boost upper cover and the boost middle cover.

3. A gas-liquid booster cylinder with positioning function as claimed in claim 2, characterized in that: The positioning device includes a positioning piston movably arranged in the boost cylinder and located between the boost upper cover and the upper end cover, and a positioning rod with one end fixedly connected to the positioning piston and the other end capable of passing through an axial hole in the boost upper cover and extending into the space between the boost upper cover and the boost middle cover.

4. A gas-liquid booster cylinder with positioning function as claimed in claim 3, characterized in that: The boosting piston is located in the space between the boosting upper cover and the boosting middle cover; the other end of the positioning rod is used to push the boosting piston to move towards the direction close to the working cylinder.

5. The gas-liquid booster cylinder with positioning function as claimed in claim 2, characterized in that: The boosting rod is also sleeved with a boosting auxiliary piston, which is located in the space between the middle end cover and the boosting middle cover.

6. The gas-liquid booster cylinder with positioning function as claimed in claim 3, characterized in that: The booster upper cover is provided with a return air inlet hole for ventilation to drive the positioning piston to move toward the upper end cover, and a booster air inlet hole for ventilation to drive the booster piston to move toward the booster middle cover.

7. The gas-liquid booster cylinder with positioning function as claimed in claim 5, characterized in that: The boost middle cover is provided with a return air inlet hole for ventilation to drive the boost piston to move toward the boost upper cover, and a boost air inlet hole for ventilation to drive the boost auxiliary piston to move toward the middle end cover.

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