Large-flow rapid oil filling oil cylinder and control method thereof

Abstract

The invention discloses a large-flow rapid oil filling oil cylinder which comprises a main cylinder body, a main piston, a rapid rod and a liquid filling valve, the main cylinder body is provided with a first sliding cavity, the bottom of the sliding cavity is provided with a supporting seat, the supporting seat is provided with a first flow channel, the main piston is installed in the first sliding cavity in a sliding mode, and the middle of the main piston is provided with a second sliding cavity; the fast rod penetrates through the middle of the supporting seat and extends into the second sliding cavity, a second flow channel communicated with the first flow channel is formed in the middle of the fast rod, the top end of the second flow channel is communicated with the second sliding cavity, the second flow channel is connected with the first hydraulic oil cylinder, and the prefill valve is used for controlling opening or closing of the second hydraulic oil cylinder. The prefill valve is communicated with the bottom of the first sliding cavity, and when the main piston moves upwards by a preset stroke, hydraulic oil of the first hydraulic oil cylinder is filled into the second sliding cavity.

Description

Technical Field

[0001] This invention relates to the field of hydraulic equipment, and in particular to a high-flow-rate, rapid-filling hydraulic cylinder and its control method. Background Technology

[0002] There is an increasing demand for high-speed hydraulic presses in automated production lines. However, it is difficult to achieve high speed and small table size in applications with large tonnage.

[0003] Traditional high-speed hydraulic presses typically have a main cylinder with a high-flow filling valve integrated on top, and two rapid cylinders located on either side of the main cylinder (the rapid cylinder component responsible for rapid oil supply needs to be installed independently on the outside of the main cylinder). This allows the main cylinder to be rapidly filled with a large flow of hydraulic oil. While this enables the equipment to operate at high speed, the main cylinder and the rapid cylinders occupy a large area, making them unsuitable for applications requiring small table sizes. Summary of the Invention

[0004] The main objective of this invention is to propose a high-flow-rate, high-volume oil filling cylinder. The aim is to integrate the high-volume, high-volume oil filling cylinder into the main cylinder, thereby reducing the area occupied by the main cylinder and the high-volume, and making it applicable to high-speed, small-platform equipment.

[0005] To achieve the above objectives, the present invention proposes a high-flow-rate, rapid-filling oil cylinder, comprising:

[0006] The main cylinder body is provided with a first sliding cavity, the bottom of the sliding cavity is provided with a support seat, and the support seat is provided with a first flow channel;

[0007] The main piston is slidably mounted in the first sliding chamber, and the main piston has a second sliding chamber in the middle.

[0008] A quick-release lever passes through the middle of the support base and extends into the second sliding cavity. The middle of the quick-release lever has a second flow channel that communicates with the first flow channel, and the top end of the second flow channel communicates with the second sliding cavity.

[0009] The second flow channel is connected to the first hydraulic cylinder;

[0010] A filling valve, used to control the opening or closing of the second hydraulic cylinder, is connected to the bottom of the first sliding chamber.

[0011] When the main piston reaches its predetermined upward stroke, hydraulic oil from the first hydraulic cylinder fills the second sliding chamber.

[0012] The first sliding chamber is under vacuum negative pressure, and the filling valve opens under the action of vacuum negative pressure, allowing the hydraulic oil from the second hydraulic cylinder to fill the first sliding chamber.

[0013] A control method for a high-flow-rate, rapid-filling hydraulic cylinder, comprising the aforementioned high-flow-rate, rapid-filling hydraulic cylinder, wherein the control method includes:

[0014] Step 1: The first hydraulic cylinder controls the input of the first hydraulic oil into the first flow channel and through the second flow channel into the second sliding chamber.

[0015] The first hydraulic oil controls the main piston to quickly push out and move in the first stroke;

[0016] Step 2: When the main piston moves a predetermined stroke, a vacuum negative pressure is formed between the main piston and the first sliding chamber;

[0017] When the filling valve reaches a predetermined threshold, the filling valve opens, and the second hydraulic cylinder controls the input of second hydraulic oil into the first sliding chamber;

[0018] Step 3: The second hydraulic oil drives the main piston to move in the second stroke. At this time, the second hydraulic oil is continuously input into the first sliding chamber until the main piston reaches the predetermined stroke.

[0019] This design integrates the quick rod into the inside of the main cylinder body. The quick rod is fixed to the support seat of the main cylinder body by the fixing nut. After the first hydraulic oil enters the second sliding chamber from the second flow channel of the quick rod, the main piston is quickly ejected.

[0020] During the rapid ejection of the main piston, a vacuum is formed in the first sliding chamber of the main piston. The vacuum negative pressure state can draw open the main valve core of the filling valve, so that the first sliding chamber of the main cylinder is filled with hydraulic oil, thereby completing the rapid ejection action of the main piston.

[0021] At the same time, its overall size is smaller. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the present invention;

[0023] Figure 2 This is a half-sectional schematic diagram of the present invention;

[0024] Figure 3 This is a radial sectional view of the present invention;

[0025] Figure 4 This is a three-dimensional schematic diagram of the present invention.

[0026] In the picture,

[0027] 1. Main cylinder,

[0028] 2. End cap,

[0029] 3. Main piston, 4. Connecting flange,

[0030] 5. Quick-release lever, 6. Retaining nut,

[0031] 7. Filling valve,

[0032] 81 is the first sliding cavity, and 82 is the second sliding cavity.

[0033] 9 is the support base, 90 is the positioning hole, and 91 is the support arm.

[0034] 101 is the first flow channel, and 102 is the second flow channel. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0038] like Figures 1 to 4 As shown, a high-flow-rate, rapid-filling hydraulic cylinder includes:

[0039] The main cylinder 1 is provided with a first sliding cavity, and a support seat is provided at the bottom of the sliding cavity. The support seat is provided with a first flow channel.

[0040] The main piston 3 is slidably mounted in the first sliding cavity, and the main piston 3 has a second sliding cavity in the middle.

[0041] A quick-release lever passes through the middle of the support base and extends into the second sliding cavity. The middle of the quick-release lever has a second flow channel that communicates with the first flow channel, and the top end of the second flow channel communicates with the second sliding cavity.

[0042] The second flow channel is connected to the first hydraulic cylinder;

[0043] A filling valve, used to control the opening or closing of the second hydraulic cylinder, is connected to the bottom of the first sliding chamber.

[0044] When the main piston 3 reaches the predetermined upward stroke, the hydraulic oil in the first hydraulic cylinder is filled into the second sliding chamber.

[0045] The first sliding chamber is under vacuum negative pressure, and the filling valve opens under the action of vacuum negative pressure, allowing the hydraulic oil from the second hydraulic cylinder to fill the first sliding chamber.

[0046] This design integrates the quick rod into the inside of the main cylinder 1. The quick rod is fixed to the support seat of the main cylinder 1 by the fixing nut. After the first hydraulic oil enters the second sliding chamber from the second flow channel of the quick rod, the main piston 3 is quickly ejected.

[0047] During the rapid ejection of the main piston 3 (i.e., the first stroke), a vacuum is formed in the first sliding chamber of the main piston. The vacuum negative pressure state can draw open the main valve core of the filling valve, so that the first sliding chamber of the main cylinder 1 is filled with hydraulic oil, thereby completing the rapid ejection action of the main piston.

[0048] At the same time, its overall size is smaller.

[0049] When the second hydraulic cylinder is filled with oil, the quick-release lever acts as a guide.

[0050] The outer wall of the quick-release lever is fitted with a second sealing ring.

[0051] The upper outer wall of the main piston is fitted with a first sealing ring that abuts against the first sliding cavity.

[0052] The filling valve is equipped with a predetermined threshold. When the filling valve reaches the predetermined threshold, the filling valve opens and injects the second hydraulic oil into the first sliding chamber, causing the main piston to move a second stroke.

[0053] Specifically, the main rod body is provided with an end cap 2 at the upper end of the first sliding cavity to restrict the main piston.

[0054] Specifically, the upper wall of the main piston is provided with a connecting flange, which is used to connect to a predetermined workpiece.

[0055] In this embodiment of the invention, the support base has a positioning hole in the middle for inserting the quick rod, and the bottom of the quick rod is installed by a fixing nut.

[0056] Specifically, the filling valve is located at the bottom of the main cylinder 1, wherein the filling valve and the first sliding chamber can be integrally connected or connected by a pipeline.

[0057] In this embodiment of the invention, the support base consists of two symmetrically arranged support arms. The first flow channel is disposed on the support arm, and the first flow channel and the second flow channel are located at the same radial position, thereby realizing the mutual communication of the flow channels.

[0058] Specifically, the second flow channel includes a horizontal flow channel and an axial flow channel, wherein the first flow channel has two sections and the horizontal flow channel has two sections, thereby providing a faster flow path.

[0059] The horizontal and axial flow channels are integrally formed on the quick rod.

[0060] In this embodiment of the invention, the support base is provided with a clearance hole. The quick-release rod can be understood as driving a small cavity, thereby achieving faster extension and retraction, while the second sliding cavity can be understood as a large cavity, thus providing greater pressure.

[0061] Specifically, the air-proof holes are arc-shaped and arranged symmetrically in two places.

[0062] A control method for a high-flow-rate, rapid-filling hydraulic cylinder, comprising the aforementioned high-flow-rate, rapid-filling hydraulic cylinder, wherein the control method includes:

[0063] Step 1: The first hydraulic cylinder controls the input of the first hydraulic oil into the first flow channel and through the second flow channel into the second sliding chamber.

[0064] The first hydraulic oil controls the main piston to quickly push out and move in the first stroke;

[0065] Step 2: When the main piston moves a predetermined stroke, a vacuum negative pressure is formed between the main piston and the first sliding chamber;

[0066] When the filling valve reaches a predetermined threshold, the filling valve opens, and the second hydraulic cylinder controls the input of second hydraulic oil into the first sliding chamber;

[0067] Step 3: The second hydraulic oil drives the main piston to move in the second stroke. At this time, the second hydraulic oil is continuously input into the first sliding chamber until the main piston reaches the predetermined stroke.

[0068] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A high-flow-rate, rapid-filling oil cylinder, characterized in that, include: The main cylinder body is provided with a first sliding cavity, the bottom of the sliding cavity is provided with a support seat, and the support seat is provided with a first flow channel; The main piston is slidably mounted in the first sliding chamber, and the main piston has a second sliding chamber in the middle. A quick-release lever passes through the middle of the support base and extends into the second sliding cavity. The middle of the quick-release lever has a second flow channel that communicates with the first flow channel, and the top end of the second flow channel communicates with the second sliding cavity. The second flow channel is connected to the first hydraulic cylinder; A filling valve, used to control the opening or closing of the second hydraulic cylinder, is connected to the bottom of the first sliding chamber. When the main piston reaches its predetermined upward stroke, hydraulic oil from the first hydraulic cylinder fills the second sliding chamber. The first sliding chamber is under vacuum negative pressure, and the filling valve opens under the action of vacuum negative pressure, allowing the hydraulic oil from the second hydraulic cylinder to fill the first sliding chamber.

2. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The main rod body is provided with an end cap at the upper end of the first sliding cavity to restrict the main piston.

3. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The upper wall of the main piston is provided with a connecting flange, which is used to connect to a predetermined workpiece.

4. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The support base has a positioning hole in the middle for inserting the quick rod, and the bottom of the quick rod is installed by a fixing nut.

5. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The filling valve is located at the bottom of the main cylinder.

6. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The support base consists of two symmetrically arranged support arms, with the first flow channel located on the support arm and the first and second flow channels at the same radial position.

7. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The second flow channel includes a horizontal flow channel and an axial flow channel.

8. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The support base is provided with a clearance hole.

9. The high-flow-rate rapid oil filling cylinder as described in claim 1, characterized in that: The air-proof holes are arc-shaped and there are two of them symmetrically arranged.

10. A method for controlling a high-flow-rate, rapid-filling hydraulic cylinder, characterized in that: The control method for the high-flow-rate rapid-filling hydraulic cylinder, including any one of claims 1-9, includes: Step 1: The first hydraulic cylinder controls the input of the first hydraulic oil into the first flow channel and through the second flow channel into the second sliding chamber. The first hydraulic oil controls the main piston to quickly push out and move in the first stroke; Step 2: When the main piston moves a predetermined stroke, a vacuum negative pressure is formed between the main piston and the first sliding chamber; When the filling valve reaches a predetermined threshold, the filling valve opens, and the second hydraulic cylinder controls the input of second hydraulic oil into the first sliding chamber; Step 3: The second hydraulic oil drives the main piston to move in the second stroke. At this time, the second hydraulic oil is continuously input into the first sliding chamber until the main piston reaches the predetermined stroke.

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