An oil cylinder capable of realizing multi-point execution element synchronous action

Abstract

The utility model discloses a kind of oil cylinder that can realize the synchronous action of multiple-point execution element, including cylinder body, the middle part of cylinder body is equipped with oil cavity, the oil cavity is waist shape, the upper side of the oil cavity is provided with gap, gap is provided with cover plate in;The piston head matched with the oil cavity is provided in the oil cavity, multiple first piston rods are arranged on the piston head with interval, the bottom of first piston rod is threadedly connected with piston head, and first piston rod upper portion extends through cover plate upwards;First oil passage and second oil passage are provided on the cylinder body, and first oil passage and second oil passage are communicated with oil cavity. The utility model can solve the problem that multiple oil cylinders share an oil passage in the prior art, the piston rod cannot realize synchronous action, and the speed regulating valve cannot be installed for speed regulation to realize piston rod synchronous action due to limited space.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a cylinder that can realize the synchronous action of multiple actuators. Background Technology

[0002] In the field of hydraulic transmission, synchronized action at multiple actuators is a common requirement. Traditional solutions often employ a combination of multiple independent cylinders, achieving synchronization through a shared oil circuit or the addition of a speed control valve. However, independently arranging multiple cylinders requires significant space, making it difficult to adapt to compact working conditions. Existing cylinder structures (such as...) Figure 6 As shown, when multiple cylinders share a single hydraulic circuit, differences in sealing resistance can still lead to poor synchronization of the piston rods. Furthermore, the additional speed control valve not only further increases space requirements but also enhances system complexity and maintenance costs. Therefore, developing a multi-actuator cylinder structure that requires no additional speed control components, is space-efficient, and offers reliable synchronization has become a key industry requirement. Utility Model Content

[0003] This invention provides a hydraulic cylinder that can realize the synchronous action of multiple actuators. It can solve the problem that when multiple hydraulic cylinders share a single hydraulic circuit, the piston rod cannot move synchronously, and due to space constraints, it is impossible to install a speed regulating valve to adjust the speed and achieve synchronous piston rod action.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder capable of synchronously operating multiple actuators, comprising a cylinder body, an oil chamber in the middle of the cylinder body, the oil chamber being waist-shaped, a notch on the upper side of the oil chamber, and a cover plate disposed within the notch; a piston head matching the oil chamber is disposed within the oil chamber, and multiple first piston rods are arranged at intervals on the piston head, the bottom of the first piston rods being threadedly connected to the piston head, and the upper part of the first piston rods extending upward through the cover plate; a first oil passage and a second oil passage are provided on the cylinder body, both of which communicate with the oil chamber. The design of a single waist-shaped oil chamber and a matching piston head allows multiple first piston rods to be rigidly connected to the same piston head, enabling all first piston rods to operate synchronously, resulting in a compact overall structure.

[0005] As a supplement to the technical solution described in this utility model, a sealing part extending into the oil cavity is provided on the lower side of the cover plate. A first O-ring is embedded in the outer wall of the sealing part. The first O-ring is used to seal the cover plate and the oil cavity, fill the gap between the cover plate and the oil cavity, prevent hydraulic oil leakage, and ensure the sealing pressure of the oil cavity.

[0006] As a supplement to the technical solution described in this utility model, the sealing cover plate is provided with a through hole that matches the first piston rod, and the first piston rod can move up and down along the through hole.

[0007] As a supplement to the technical solution described in this utility model, a pull rod seal is provided at the through hole on the outer side wall of the first piston rod. The pull rod seal seals the gap between the first piston rod and the through hole to prevent hydraulic oil from leaking from the through hole.

[0008] As a supplement to the technical solution described in this utility model, a second O-ring and a wear-resistant ring are embedded in the outer wall of the piston head. The second O-ring is installed in the annular groove of the outer wall of the piston head for sealing the piston head and the inner wall of the oil chamber. As the piston head slides back and forth, it always fits against the cylinder wall, preventing hydraulic oil from flowing into the working chamber from both sides, and ensuring that the hydraulic oil pressure can effectively drive the piston head to move. When the first piston rod is subjected to eccentric load, the wear-resistant ring first contacts the inner wall of the oil chamber to avoid direct friction between the metal body of the piston head and the cylinder wall, and to prevent scratches on the cylinder wall.

[0009] As a supplement to the technical solution described in this utility model, a second piston rod is provided at both ends of the cylinder body, which can further expand the number of execution points and is suitable for operations that require clamping at both ends.

[0010] As a supplement to the technical solution described in this utility model, the cover plate is connected to the cylinder body by multiple screws. Compared with the traditional external thread locking method, the screw connection has a more uniform force distribution, which can avoid deformation of the cover plate. At the same time, it is convenient to disassemble the cover plate, and improve the convenience of maintenance by inspecting and replacing the internal components.

[0011] As a supplement to the technical solution described in this utility model, the first piston rod is provided with a connecting hole, which is used to connect with external pushing, clamping and other actuators to realize power transmission.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By integrating multiple piston rods onto the piston head through a waist-shaped cylinder body, hydraulic oil can be evenly applied to the end face of the irregularly shaped piston head, driving all piston rods to extend and retract synchronously. This eliminates the need for an additional speed control valve, achieving multi-point synchronous action directly from a structural perspective. It is suitable for scenarios with high space requirements, multi-point pushing, synchronous lifting, and other applications where high consistency of action is required. The piston head is equipped with a wear-resistant ring, which can effectively buffer the direct friction between the cylinder wall and the piston head when the piston rod is subjected to eccentric load. This solves the problem that existing systems with multiple cylinders sharing a single oil circuit cannot achieve synchronous piston rod action, and where space constraints prevent the installation of a speed control valve to adjust the speed and achieve synchronous piston rod action. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a schematic diagram of the internal flow channel structure of the cylinder of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the cylinder body of this utility model;

[0019] Figure 6 This is a schematic diagram of an existing hydraulic cylinder structure.

[0020] Figure label:

[0021] 1. Cylinder block, 2. Oil chamber, 3. Notch, 4. Piston head, 5. First piston rod, 6. Cover plate, 7. First oil passage, 8. Second oil passage, 9. Sealing part, 10. First O-ring, 11. Through hole, 12. Tie rod seal, 13. Second O-ring, 14. Wear ring, 15. Second piston rod, 16. Connecting hole. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] The present invention relates to a hydraulic cylinder capable of synchronously operating multiple actuators, such as... Figure 1-6 As shown, the system includes a cylinder body 1, with an oil chamber 2 in the middle of the cylinder body 1. The oil chamber 2 is waist-shaped, and a rectangular notch 3 is formed on the upper side of the oil chamber 2. A cover plate 6 is installed inside the notch 3. A piston head 4 matching the oil chamber 2 is installed inside the oil chamber 2. Three first piston rods 5 are arranged at intervals on the piston head 4. Three internal threaded holes are machined at intervals on the upper surface of the piston head 4 for threaded connection with the bottom of the first piston rods 5. The upper part of the first piston rods 5 extends upward and passes through the cover plate 6. A first oil passage 7 and a second oil passage are provided on the cylinder body 1. Channel 8, the first oil passage channel 7 and the second oil passage channel 8 are both connected to the oil chamber 2 and are located on both sides of the piston head 4, respectively, to realize the entry and exit of hydraulic oil and drive the piston head 4 to reciprocate. The design of a single waist-shaped oil chamber 2 and a matching piston head 4 makes multiple first piston rods 5 rigidly connected to the same piston head 4. All first piston rods 5 can move synchronously. The overall structure is compact. When oil enters the first oil passage channel 7, the piston head 4 moves upward and the first piston rod 5 extends. When oil enters the second oil passage channel 8, the piston head 4 moves downward and the first piston rod 5 retracts.

[0024] In this embodiment, as Figure 2As shown, a sealing part 9 extending into the oil cavity 2 is provided on the lower side of the cover plate 6. The size of the sealing part 9 matches the inner wall of the oil cavity 2 and can extend into the oil cavity 2. An annular groove is opened on the outer wall of the sealing part 9, and a first O-ring 10 is embedded therein. The first O-ring 10 is used to seal the cover plate 6 and the oil cavity 2, fill the gap between the cover plate 6 and the oil cavity 2, prevent hydraulic oil leakage, and ensure the sealing pressure of the oil cavity 2.

[0025] In this embodiment, as Figure 2 As shown, the sealing cover plate 6 is provided with a through hole 11 that matches the first piston rod 5, and the first piston rod 5 can move up and down along the through hole 11.

[0026] In this embodiment, as Figure 2-3 As shown, a pull rod seal 12 is provided at the through hole 11 on the outer side wall of the first piston rod 5. The pull rod seal 12 seals the gap between the first piston rod 5 and the through hole 11 to prevent hydraulic oil from leaking from the through hole 11.

[0027] In this embodiment, as Figure 2 As shown, a second O-ring 13 and a wear-resistant ring 14 are embedded in the outer wall of the piston head 4. The wear-resistant ring 14 is located on the upper and lower sides of the second O-ring 13. Both the second O-ring 13 and the wear-resistant ring 14 are installed in the annular groove on the outer wall of the piston head 4 for sealing between the piston head 4 and the inner wall of the oil chamber 2. As the piston head 4 slides back and forth, it always fits against the cylinder wall, preventing hydraulic oil from flowing between the two sides of the working oil chamber 2, ensuring that the hydraulic oil pressure can effectively drive the piston head 4 to move, and avoiding power loss and decrease in synchronization accuracy caused by oil flow. When the first piston rod 5 is subjected to eccentric load, the wear-resistant ring 14 first contacts the inner wall of the oil chamber 2 to avoid direct friction between the metal body of the piston head 4 and the cylinder wall, and prevent the cylinder wall from being scratched.

[0028] In this embodiment, as Figure 1 As shown, the cylinder body 1 is provided with second piston rods 15 at both ends. By adding second piston rods 15, the number of execution points can be further expanded, which is suitable for operations that require clamping at both ends.

[0029] In this embodiment, as Figure 1 As shown, the cover plate 6 is connected to the cylinder body 1 by multiple screws. Compared with the traditional external thread locking method, the screw connection has a more uniform force distribution, which can prevent the cover plate from deforming. At the same time, it is convenient to disassemble the cover plate, and improve the convenience of maintenance by inspecting and replacing the internal components.

[0030] In this embodiment, as Figure 3 As shown, the first piston rod 5 is provided with a connecting hole 16. The connecting hole 16 is an internal threaded connecting hole, which is used to connect with external push, clamp and other actuators to realize power transmission.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is 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, 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, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A hydraulic cylinder capable of realizing synchronous action of multiple actuators, characterized in that, include: A cylinder body (1) has an oil chamber (2) in the middle. The oil chamber (2) is waist-shaped. A notch (3) is provided on the upper side of the oil chamber (2). A cover plate (6) is provided inside the notch (3). The oil chamber (2) is provided with a piston head (4) that matches the oil chamber (2). Multiple first piston rods (5) are arranged at intervals on the piston head (4). The bottom of the first piston rod (5) is threadedly connected to the piston head (4). The upper part of the first piston rod (5) extends upward through the cover plate (6). The cylinder body (1) is provided with a first oil passage (7) and a second oil passage (8), both of which are connected to the oil chamber (2).

2. The hydraulic cylinder capable of synchronous operation of multi-point actuators according to claim 1, characterized in that: The cover plate (6) is provided with a sealing part (9) extending into the oil cavity (2) on its lower side, and a first O-ring (10) is embedded in the outer wall of the sealing part (9).

3. The hydraulic cylinder capable of synchronous operation of multi-point actuators according to claim 1, characterized in that: The cover plate (6) is provided with a through hole (11) that matches the first piston rod (5).

4. The hydraulic cylinder capable of synchronous operation of multi-point actuators according to claim 1, characterized in that: A pull rod seal (12) is provided at the through hole (11) on the outer side wall of the first piston rod (5).

5. The hydraulic cylinder capable of synchronous operation of multiple actuators according to claim 1, characterized in that: The outer wall of the piston head (4) is fitted with a second O-ring (13) and a wear-resistant ring (14).

6. The hydraulic cylinder capable of synchronous operation of multi-point actuators according to claim 1, characterized in that: The cylinder (1) is provided with a second piston rod (15) at both ends.

7. The hydraulic cylinder capable of synchronous operation of multi-point actuators according to claim 1, characterized in that: The cover plate (6) is connected to the cylinder body (1) by a plurality of screws.

8. The hydraulic cylinder capable of synchronous operation of multi-point actuators according to claim 1, characterized in that: The first piston rod (5) is provided with a connecting hole (16).

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