Oil collector structure

Abstract

The invention discloses an oil collector structure which is characterized in that the oil collector structure comprises a first cylinder head, an oil collector cylinder body, a second cylinder head and a movable block, the first cylinder head is arranged at one end of the oil collector cylinder body, the second cylinder head is arranged at the other end of the oil collector cylinder body, and a movable cavity is formed in the cylinder body; the movable block is arranged in the movable cavity in a sliding mode, the first cylinder head is provided with a forward oil inlet communicated with the movable cavity, the second cylinder head is provided with a reverse oil inlet communicated with the movable cavity, and the cylinder body is provided with a forward first-stage oil outlet, a forward second-stage oil outlet, a reverse first-stage oil outlet and a reverse second-stage oil outlet. The core pulling mechanism has the beneficial effects that the requirement of insufficient oil cylinder connectors of the die casting machine is met, meanwhile, the sequential core pulling action of different oil cylinders can be achieved, and the high oil pressure requirement can be met when powerful core pulling is needed in multiple sets of oil cylinders.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic systems, and particularly to an oil collector structure. Background Art

[0002] In the field of the hydraulic system of die-casting machines, the coordinated operation of multiple cylinders is a core technical link for realizing complex mold actions. In the traditional hydraulic circuit design, when a single oil port needs to drive multiple groups of actuating cylinders, branch pipelines or independent valve control units are usually used to achieve oil circuit distribution. However, the existing technologies have significant defects in practical applications:

[0003] Firstly, when the number of cylinder interfaces of the die-casting machine is insufficient, conventional solutions require additional shunt valve blocks or external oil circuit expansion devices. Such structures not only increase the system complexity and the requirement for installation space, but also exacerbate the oil pressure loss due to multi-stage shunting. Especially under high-pressure conditions, the driving force of the end cylinders is likely to be insufficient, making it difficult to meet the strict requirements for action synchronization in precision die-casting processes.

[0004] Secondly, for the core-pulling action groups with strict timing requirements, the existing technologies mostly rely on the cooperation of solenoid valve groups and PLC timing control to achieve sequential actions. This solution has the cumulative effect of response delay. When multiple groups of cylinders share the oil circuit, hydraulic shock is likely to cause sequential disorders, resulting in asynchronous core-pulling actions of the mold. Especially in the high-speed continuous die-casting working condition, the mechanical adjustment of the traditional sequence valve is difficult to dynamically adapt to the change of process parameters, seriously affecting the quality stability of the formed parts.

[0005] Thirdly, in the mixed load scenario (that is, when a single group in multiple groups of cylinders requires an unconventional core-pulling force), the traditional pressure equalization distribution method is likely to cause insufficient driving force of the high-load cylinders, while forcibly increasing the system pressure will lead to the risk of overload of the low-load cylinders. Although the existing patent technology CN116060594B proposes a hierarchical supercharging scheme, its complex pressure feedback mechanism significantly increases the manufacturing cost, and system pressure oscillation is likely to be caused during the dynamic adjustment process.

[0006] There is an urgent need in the current market for an integrated hydraulic distribution device that can achieve intelligent pressure distribution and sequential control of multiple cylinders under limited interface conditions, and at the same time has the ability to adapt to loads. Summary of the Invention

[0007] Aiming at the above deficiencies in the existing technologies, the present invention provides an oil collector structure, which increases the interfaces of multiple groups of cylinders of the die-casting machine, can also achieve sequential actions of the cylinders, and meet different oil pressure distribution effects.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] An oil collector structure, characterized in that: it includes a first cylinder head, an oil collector cylinder block, a second cylinder head, and a movable block. The first cylinder head is arranged at one end of the oil collector cylinder block, the second cylinder head is arranged at the other end of the oil collector cylinder block. There is a movable cavity in the oil collector cylinder block, and the movable block is slidably arranged in the movable cavity. The first cylinder head has a forward oil inlet communicating with the movable cavity, the second cylinder head has a reverse oil inlet communicating with the movable cavity. The oil collector cylinder block has a forward first-stage oil outlet, a forward second-stage oil outlet, a reverse first-stage oil outlet, and a reverse second-stage oil outlet. And when the movable block moves a predetermined distance towards the second cylinder head side, the forward first-stage oil outlet communicates with the forward oil inlet; and when the movable block abuts against the second cylinder head, the forward second-stage oil outlet communicates with the forward oil inlet; and when the movable block moves a predetermined distance towards the first cylinder head side, the reverse first-stage oil outlet communicates with the reverse oil inlet; and when the movable block abuts against the first cylinder head, the reverse second-stage oil outlet communicates with the reverse oil inlet; both ends of the movable block are provided with an elastically telescopic first ejector rod and a second ejector rod.

[0010] Further, the movable block is cylindrical, and the movable block includes a left half block and a right half block connected together by bolts. A spring placement cavity is arranged between the left half block and the right half block, a compression spring is arranged in the spring placement cavity. The first ejector rod is movably arranged on the left half block, the first ejector rod abuts against one end of the compression spring, the second ejector rod is movably arranged on the right half block, the second ejector rod abuts against the other end of the compression spring. The end face of the left half block has a first ejector rod extension hole, and the end face of the right half block has a second ejector rod extension hole.

[0011] Further, both the left half block and the right half block are provided with anti-slip rings arranged in a ring shape.

[0012] The beneficial effects of the present invention include: meeting the demand for insufficient oil cylinder interfaces of die-casting machines, being able to achieve sequential core pulling actions of different oil cylinders, and being able to meet high oil pressure requirements when strong core pulling is required in multiple groups of oil cylinders. Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the present invention;

[0014] Figure 2 is a structural schematic diagram of the movable block of the present invention. Detailed Description of the Invention

[0015] The present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0016] One kind as Figure 1-2The shown oil collector structure includes a first cylinder head 1, an oil collector cylinder block 2, a second cylinder head 3, and a movable block 4. The first cylinder head 1 is disposed at one end of the oil collector cylinder block 2, and the second cylinder head 3 is disposed at the other end of the oil collector cylinder block 2. An activity cavity is provided in the oil collector cylinder block 2, and the movable block 4 is slidably disposed in the activity cavity. The first cylinder head 1 has a forward oil inlet 5 communicating with the activity cavity. The second cylinder head 3 has a reverse oil inlet 6 communicating with the activity cavity. The cylinder block 2 has a forward first-stage oil outlet a, a forward second-stage oil outlet b, a reverse first-stage oil outlet c, and a reverse second-stage oil outlet d. When the movable block 4 moves a predetermined distance toward the second cylinder head 3 side, the forward first-stage oil outlet a communicates with the forward oil inlet 5; when the movable block 4 abuts against the second cylinder head 3, the forward second-stage oil outlet b communicates with the forward oil inlet 5; when the movable block 4 moves a predetermined distance toward the first cylinder head 1 side, the reverse first-stage oil outlet c communicates with the reverse oil inlet 6; when the movable block 4 abuts against the first cylinder head 1, the reverse second-stage oil outlet d communicates with the reverse oil inlet 6. Elastic telescopic first ejector rods 7 and second ejector rods 8 are provided at both ends of the movable block 4.

[0017] As Figure 2 shown, the movable block 4 is cylindrical. The movable block 4 includes a left half block 41 and a right half block 42 connected together by bolts. A spring placement cavity is provided between the left half block 41 and the right half block 42. A compression spring 9 is provided in the spring placement cavity. The first ejector rod 7 is movably disposed on the left half block 41. The first ejector rod 7 abuts against one end of the compression spring 9. The end face of the left half block 41 has a first ejector rod extension hole. The second ejector rod 8 is movably disposed on the right half block 42. The second ejector rod 8 abuts against the other end of the compression spring 9. The end face of the right half block 42 has a second ejector rod extension hole. In the natural elongation state of the compression spring 9, the first ejector rod 7 extends out of the left end face of the left half block 41, and the second ejector rod 8 extends out of the right end face of the right half block 42. Anti-slip rings 10 are annularly arranged on both the left half block 41 and the right half block 42.

[0018] Its working principle is that the forward oil inlet 5 is connected to the oil pump to start pumping oil into the left moving cavity of the moving block 4. The hydraulic oil pushes the moving block 4 to move towards the second cylinder head 3. When the left end of the moving block 4 exceeds the forward first-stage oil outlet a, the first oil cylinder connected to the forward first-stage oil outlet a starts to act. At this time, the second ejector rod 8 just abuts against the inner end face of the second cylinder head 3. After the first oil cylinder moves in place, the oil pressure in the left moving cavity of the moving block 4 increases, and the moving block 4 continues to move towards the second cylinder head 3. The compression spring 9 is compressed, and the second ejector rod 8 is gradually pressed into the spring placement cavity. When the right half 42 abuts against the second cylinder head 3, the high-pressure oil enters the forward second-stage oil outlet b. The number of forward second-stage oil outlets b in this embodiment is two. Therefore, two second oil cylinders for extrusion or core pulling can be connected, or one of the forward second-stage oil outlets b can be connected to a pressure-holding oil cylinder to keep the oil outlet pressure of the other forward second-stage oil outlet b stable without fluctuation. In addition, the anti-slip ring 10 can also prevent the situation where the moving block 4 moves leftward due to insufficient pressure in the left moving cavity to a certain extent. When the oil cylinder needs to move in the reverse direction, it is the same principle. Oil is supplied through the reverse oil inlet 6 to realize the sequential action of the oil cylinder and the high-pressure core pulling action again.

[0019] The technical solutions provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to helping understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An oil collector structure, characterized in that: It includes a first cylinder head (1), an oil collector cylinder block (2), a second cylinder head (3), and a movable block (4). The first cylinder head (1) is arranged at one end of the oil collector cylinder block (2), the second cylinder head (3) is arranged at the other end of the oil collector cylinder block (2). An activity cavity is provided inside the oil collector cylinder block (2), and the movable block (4) is slidably arranged in the activity cavity. A forward oil inlet (5) communicating with the activity cavity is provided on the first cylinder head (1), a reverse oil inlet (6) communicating with the activity cavity is provided on the second cylinder head (3). A forward first-stage oil outlet (a), a forward second-stage oil outlet (b), a reverse first-stage oil outlet (c), and a reverse second-stage oil outlet (d) are provided on the oil collector cylinder block (2). When the movable block (4) moves a predetermined distance towards the second cylinder head (3) side, the forward first-stage oil outlet (a) communicates with the forward oil inlet (5); when the movable block (4) abuts against the second cylinder head (3), the forward second-stage oil outlet (b) communicates with the forward oil inlet (5); when the movable block (4) moves a predetermined distance towards the first cylinder head (1) side, the reverse first-stage oil outlet (c) communicates with the reverse oil inlet (6); when the movable block (4) abuts against the first cylinder head (1), the reverse second-stage oil outlet (d) communicates with the reverse oil inlet (6); elastic telescopic first ejector rod (7) and second ejector rod (8) are arranged at both ends of the movable block (4).

2. The oil collector structure according to claim 1, wherein: The movable block (4) is cylindrical. The movable block (4) includes a left half block (41) and a right half block (42) connected together by bolts. A spring placement cavity is provided between the left half block (41) and the right half block (42). A compression spring (9) is arranged in the spring placement cavity. The first ejector rod (7) is movably arranged on the left half block (41), the first ejector rod (7) abuts against one end of the compression spring (9), the second ejector rod (8) is movably arranged on the right half block (42), the second ejector rod (8) abuts against the other end of the compression spring (9). A first ejector rod extension hole is provided on the end face of the left half block (41), and a second ejector rod extension hole is provided on the end face of the right half block (42).

3. The oil collector structure according to claim 2, characterized in that: Anti-slip rings (10) are arranged in a circular pattern on both the left half block (41) and the right half block (42).

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