A concealed double-link clamping cylinder

Abstract

This application discloses a concealed double-link clamping cylinder, relating to the field of cylinders. It includes a cylinder body with a piston inside. A connecting platform is located at the upper end of the cylinder body. A movable plate is fixed to the upper end of the piston. A pressure plate is located at the upper ends of the movable plate and the connecting platform. Double-link assemblies are arranged on both sides of the pressure plate. The double-link assemblies include a first movable arm, a second movable arm, and a third movable arm. The two ends of the first movable arm are hinged to the rear ends of the pressure plate and the movable plate, respectively. The two ends of the second movable arm are hinged to the middle section of the pressure plate and the connecting platform, respectively. Protrusions are provided on both sides of the movable plate, and the two ends of the third movable arm are hinged to the middle section of the second movable arm and the protrusions, respectively. This device can lift the pressure plate and press it down using the first, second, and third movable arms. This clamping cylinder is small in size and can be lowered below the mounting surface during installation, making it suitable for installation in small spaces, and it also has a high overall aesthetic appeal.

Description

Technical Field

[0001] This application relates to the field of cylinders, and in particular to a concealed double-link clamping cylinder. Background Technology

[0002] Hook cylinders are an innovative design combining cylinder technology with mechanical hooks, and are widely used in industrial automation. Their core structure includes a cylinder body, piston, hook tongue, and push rod. Pneumatic pressure drives the piston to move, which in turn rotates the hook tongue to achieve the gripping or releasing action. Compared to traditional cylinders, hook cylinders offer advantages such as compact structure, stable gripping force, and precise action. They are particularly suitable for applications such as gripping automotive wiring harness connectors and conveying aluminum drying oven bars, significantly improving production efficiency and reducing the risk of manual intervention.

[0003] For example, a hook-type cylinder with patent number CN216642644U has the following shortcomings in actual use:

[0004] The above-mentioned device allows air to enter the cylinder through the air nozzle. Under pressure, the piston moves upward. During the movement, the piston presses against the hook tongue, causing the hook tongue to rotate. This ensures that the second end of the hook tongue extends and grips the automotive wiring harness connector more firmly. However, when installing the above-mentioned hook-type cylinder and the traditional hook-type cylinder, the cylinder must be higher than the mounting surface, occupying a large installation volume and being unsightly overall. Utility Model Content

[0005] To address the technical issues of traditional hook-type cylinders being higher than the mounting surface, occupying a large volume and being unsightly, this application provides a concealed double-link clamping cylinder.

[0006] The concealed double-linkage clamping cylinder provided in this application adopts the following technical solution:

[0007] A concealed double-link clamping cylinder includes a cylinder body, in which a cylinder piston is slidably disposed. A connecting platform is provided at the upper end of the cylinder body, and a movable plate is fixed at the upper end of the cylinder piston. A pressure plate is provided at the upper end of the movable plate and the connecting platform. The height of the pressure plate is higher than the height of the cylinder body. A double-link assembly is provided on both sides of the pressure plate. The double-link assembly includes a first movable arm, a second movable arm, and a third movable arm. The two ends of the first movable arm are respectively hinged to the rear ends of the pressure plate and the movable plate. The two ends of the second movable arm are respectively hinged to the middle section of the pressure plate and the connecting platform. Protrusions are provided on both sides of the movable plate, and the two ends of the third movable arm are respectively hinged to the middle section of the second movable arm and the protrusions.

[0008] By adopting the above technical solution, when the cylinder piston rises, the moving plate will rise synchronously. At this time, the first movable arm will push the rear end of the pressure plate upward, while the front end of the pressure plate will be pulled down by the second movable arm. At this time, the pressure plate will tilt and press down, achieving a clamping effect in conjunction with the fixed surface of the equipment. Meanwhile, the third movable arm, the second movable arm, and the connecting platform will form a triangular structure, which can prevent the pressure plate from shaking and restrict the degree of freedom of the pressure plate. Moreover, the pressure plate is located at the top, the clamping cylinder is small in size, and the cylinder body can be lowered below the mounting surface during installation, making it suitable for installation in small spaces, and the overall aesthetics are high.

[0009] Preferably, the movable plate has a connecting hole, the upper end of the cylinder piston has an internal thread hole, and the movable plate and the cylinder piston are fixed together by bolts.

[0010] By adopting the above technical solution, a bolt is inserted into the connecting hole and screwed into the internal thread hole, which can realize the connection between the moving plate and the cylinder piston, making disassembly and assembly convenient.

[0011] Preferably, the upper edge of the protrusion near the first movable arm has a clearance slope.

[0012] By adopting the above technical solution, when the first movable arm tilts forward, the avoidance slope can prevent the protrusion from colliding with the first movable arm, thereby expanding the swing range of the first movable arm.

[0013] Preferably, the pressure plate has a first rotating hole and a second rotating hole. A first rotating shaft is provided in the first rotating hole and is hinged to the upper end of the second movable arm. A second rotating shaft is provided in the second rotating hole and is hinged to the upper end of the first movable arm. Slits are provided above the first rotating hole and below the second rotating hole.

[0014] By adopting the above technical solution, opening a slit can increase the expansion space of the first rotating hole and the second rotating hole, which facilitates the installation of the first rotating shaft and the second rotating shaft. Moreover, when the pressure plate is under force, the front end of the pressure plate is subjected to the upward squeezing force of the clamped object, the middle section is subjected to the downward squeezing force of the first rotating shaft, and the rear end is subjected to the upward squeezing force of the second rotating shaft, which can prevent the pressure plate from deforming due to the force on the slit.

[0015] Preferably, a notch is provided below the pressure plate, and the notch is located on the side of the first rotating hole away from the second rotating hole.

[0016] By adopting the above technical solution, the notch can press the clamped object into the notch when clamping, thereby improving clamping stability.

[0017] Preferably, the cylinder body has an inner cavity, and a movable piston is slidably disposed in the inner cavity. The movable piston is connected to the bottom of the cylinder piston. A piston sealing ring is disposed on the outer side of the movable piston, and the outer side of the piston sealing ring abuts against the inner wall of the inner cavity. A vent hole is opened on the top of the cylinder body, and the vent hole communicates with the upper end of the inner cavity.

[0018] By adopting the above technical solution, the moving piston is pushed by the air pressure at the bottom, which can drive the cylinder piston to push upward, and squeeze the gas above the moving piston through the vent hole. The piston sealing ring can ensure the airtightness of the cylinder. Similarly, the negative pressure below the moving piston can also pull the moving piston down, thereby realizing the lifting and lowering of the cylinder piston.

[0019] Preferably, a cover plate is threadedly connected to the lower part of the inner cavity, and a through hole is opened in the middle of the cover plate, with an air pipe connector connected to the lower end of the through hole.

[0020] By adopting the above technical solution, gas supply can be achieved by connecting the gas pipe connector to the gas pipeline. Moreover, the cover plate is threaded and removable, making it convenient for replacement and maintenance.

[0021] Preferably, a plug sealing ring is provided between the cover plate and the cylinder body.

[0022] By adopting the above technical solution, the plug sealing ring can improve the sealing performance between the cover plate and the cylinder body, and improve the stability of the cylinder in use.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The pressure plate is raised by the first, second, and third movable arms, making its height higher than the cylinder body. In use, the first movable arm raises the rear end of the pressure plate, the second movable arm presses down the front end of the pressure plate, and the third movable arm stabilizes the position of the pressure plate. This avoids the structure of traditional hook-type cylinders that require the pressure plate to be hinged to the cylinder body. The clamping cylinder is smaller in size and the cylinder body can be lowered below the mounting surface during installation, making it suitable for installation in small spaces. It also has a higher overall aesthetic appeal. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall isometric structure of this application;

[0026] Figure 2 This is a schematic diagram of the connection structure of the pressure plate in this application;

[0027] Figure 3 This is a schematic diagram of the structure of the movable plate in this application;

[0028] Figure 4 This is a schematic diagram of the pressure plate in this application;

[0029] Figure 5 This is a cross-sectional view of the cylinder block in this application.

[0030] Reference numerals: 1. Cylinder body; 2. Cylinder piston; 3. Connecting platform; 4. Moving plate; 5. Pressure plate; 6. First movable arm; 7. Second movable arm; 8. Protrusion; 9. Third movable arm; 10. Connecting hole; 11. Internal threaded hole; 12. Avoidance slope; 13. Notch; 14. First rotating hole; 15. Second rotating hole; 16. Slit; 17. Inner cavity; 18. Moving piston; 19. Piston sealing ring; 20. Vent hole; 21. Cover plate; 22. Plug sealing ring; 23. Through hole; 24. Air pipe connector. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0032] This application discloses a concealed double-link clamping cylinder.

[0033] Reference Figure 1 and Figure 5 A concealed double-link clamping cylinder includes a cylinder body 1, a cylinder piston 2 slidably disposed in the cylinder body 1, an inner cavity 17 inside the cylinder body 1, and a movable piston 18 slidably disposed in the inner cavity 17. The movable piston 18 is connected to the bottom of the cylinder piston 2. A piston sealing ring 19 is disposed on the outer side of the movable piston 18, and the outer side of the piston sealing ring 19 abuts against the inner wall of the inner cavity 17. A vent hole 20 is opened at the top of the cylinder body 1, and the vent hole 20 communicates with the upper end of the inner cavity 17. A cover plate 21 is threadedly connected to the lower part of the inner cavity 17, and a plug sealing ring 22 is disposed between the cover plate 21 and the cylinder body 1. A through hole 23 is opened in the middle of the cover plate 21, and an air pipe connector 24 is connected to the lower end of the through hole 23.

[0034] With the above settings, gas supply can be achieved by connecting the air pipe connector 24 to the air pipeline. At the same time, the plug sealing ring 22 can improve the sealing between the cover plate 21 and the cylinder body 1. The moving piston 18 is pushed by the air pressure at the bottom, which can drive the cylinder piston 2 to push upward, and squeeze the gas above the moving piston 18 through the vent hole 20. The piston sealing ring 19 can ensure the airtightness of the cylinder. Similarly, the negative pressure below the moving piston 18 can also pull the moving piston 18 down, thereby realizing the lifting and lowering of the cylinder piston 2.

[0035] Reference Figure 2 and Figure 3A movable plate 4 is fixed to the upper end of the cylinder piston 2. A connecting hole 10 is provided on the movable plate 4. An internal threaded hole 11 is provided at the upper end of the cylinder piston 2. The movable plate 4 and the cylinder piston 2 are fixed together by bolts. A connecting platform 3 is provided at the upper end of the cylinder body 1. A pressure plate 5 is provided at the upper end of the movable plate 4 and the connecting platform 3. The height of the pressure plate 5 is higher than the height of the cylinder body 1. A double connecting rod assembly is provided on both sides of the pressure plate 5. The double connecting rod assembly includes a first movable arm 6, a second movable arm 7 and a third movable arm 9. The two ends of the first movable arm 6 are respectively hinged to the rear ends of the pressure plate 5 and the movable plate 4. The two ends of the second movable arm 7 are respectively hinged to the middle section of the pressure plate 5 and the connecting platform 3. Protrusions 8 are provided on both sides of the movable plate 4. The two ends of the third movable arm 9 are respectively hinged to the middle section of the second movable arm 7 and the protrusions 8.

[0036] With the above setup, during connection, simply insert the bolt into the connecting hole 10 and then screw it into the internal thread hole 11 to easily connect the movable plate 4 and the cylinder piston 2, making assembly and disassembly very convenient. When the cylinder piston 2 rises, the movable plate 4 will rise synchronously. At this time, the first movable arm 6 will push up the rear end of the pressure plate 5, while the front end of the pressure plate 5 is pulled down by the second movable arm 7, causing the pressure plate 5 to tilt and press down, cooperating with the fixed surface of the equipment to achieve a clamping effect. At the same time, the third movable arm 9, the second movable arm 7, and the connecting platform 3 will form a stable triangular structure, effectively preventing the pressure plate 5 from shaking and restricting its degree of freedom. In addition, the pressure plate 5 is located at the top and has a small overall volume, allowing the cylinder body 1 to be lowered below the mounting surface during installation, making it very suitable for installation in small spaces and aesthetically pleasing.

[0037] Reference Figure 2 and Figure 3 On the upper edge of the protrusion 8 near the first movable arm 6, a clearance slope 12 is specially provided to provide clearance space for the movement of the component. The pressure plate 5 is provided with a first rotating hole 14 and a second rotating hole 15. A first rotating shaft is installed in the first rotating hole 14, which is hinged to the upper end of the second movable arm 7; a second rotating shaft is installed in the second rotating hole 15, which is hinged to the upper end of the first movable arm 6. Furthermore, slits 16 are correspondingly provided above the first rotating hole 14 and below the second rotating hole 15. A notch 13 is also provided below the pressure plate 5, and this notch 13 is located on the side of the first rotating hole 14 away from the second rotating hole 15.

[0038] With the above configuration, when the first movable arm 6 tilts forward, the avoidance slope 12 on the protrusion 8 can avoid contact with the first movable arm 6, effectively expanding the swing range of the first movable arm 6 and making the movement of the component more flexible and free. The slit 16 on the pressure plate 5 provides additional expansion space for the first rotating hole 14 and the second rotating hole 15, which not only facilitates the installation of the first and second rotating shafts, but also plays a unique role when the pressure plate 5 is under force—when the front end of the pressure plate 5 is subjected to upward pressure from the clamped object, the middle section is subjected to downward pressure from the first rotating shaft, and the rear end is subjected to upward pressure from the second rotating shaft, the slit 16 can prevent the pressure plate 5 from deforming due to the force. Furthermore, the notch 13 below the pressure plate 5 can firmly press the clamped object into it during clamping operations, significantly improving clamping stability.

[0039] The implementation principle of this application is as follows:

[0040] Gas supply is achieved by connecting the gas pipe connector 24 to the gas pipeline, which drives the moving piston 18 to move up and down, thereby raising and lowering the cylinder piston 2. When the cylinder piston 2 rises, the moving plate 4 will rise synchronously. At this time, the first movable arm 6 will push the rear end of the pressure plate 5 upward, while the front end of the pressure plate 5 will be pulled down by the second movable arm 7. At this time, the pressure plate 5 will tilt and press down, achieving a clamping effect in conjunction with the fixed surface of the equipment. Meanwhile, the third movable arm 9, the second movable arm 7, and the connecting platform 3 will form a triangular structure, which can prevent the pressure plate 5 from shaking and restrict the degree of freedom of the pressure plate 5. Moreover, the pressure plate 5 is located at the top, the clamping cylinder is small in size, and the cylinder body 1 can be lowered below the mounting surface during installation, which is suitable for installation in small spaces and has a high overall aesthetic appeal.

[0041] In summary, this device can lift the pressure plate 5 and press it down by means of the first movable arm 6, the second movable arm 7 and the third movable arm 9. The clamping cylinder is small in size and can be lowered below the mounting surface during installation, making it suitable for installation in small spaces, and it has a high overall aesthetic appeal.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concealed double-link clamping cylinder, comprising a cylinder body (1), characterized in that: A cylinder piston (2) is slidably disposed in the cylinder body (1). A connecting platform (3) is disposed at the upper end of the cylinder body (1). A moving plate (4) is fixed at the upper end of the cylinder piston (2). A pressure plate (5) is disposed at the upper end of the moving plate (4) and the connecting platform (3). The height of the pressure plate (5) is higher than the height of the cylinder body (1). A double linkage assembly is disposed on both sides of the pressure plate (5). The double linkage assembly includes a first movable arm (6), a second movable arm (7) and a third movable arm (9). The two ends of the first movable arm (6) are respectively hinged to the rear ends of the pressure plate (5) and the moving plate (4). The two ends of the second movable arm (7) are respectively hinged to the middle section of the pressure plate (5) and the connecting platform (3). A protrusion (8) is disposed on both sides of the moving plate (4), and the two ends of the third movable arm (9) are respectively hinged to the middle section of the second movable arm (7) and the protrusion (8).

2. The concealed double-link clamping cylinder according to claim 1, characterized in that: The movable plate (4) has a connecting hole (10), the upper end of the cylinder piston (2) has an internal thread hole (11), and the movable plate (4) and the cylinder piston (2) are fixed together by bolts.

3. The concealed double-link clamping cylinder according to claim 1, characterized in that: The protrusion (8) has an avoidance slope (12) on the upper edge of the side near the first movable arm (6).

4. A concealed double-link clamping cylinder according to claim 1, characterized in that: The pressure plate (5) is provided with a first rotating hole (14) and a second rotating hole (15). A first rotating shaft is provided in the first rotating hole (14) and is hinged to the upper end of the second movable arm (7). A second rotating shaft is provided in the second rotating hole (15) and is hinged to the upper end of the first movable arm (6). Slits (16) are provided above the first rotating hole (14) and below the second rotating hole (15).

5. A concealed double-link clamping cylinder according to claim 4, characterized in that: The pressure plate (5) has a notch (13) at its bottom, and the notch (13) is located on the side of the first rotating hole (14) away from the second rotating hole (15).

6. A concealed double-link clamping cylinder according to claim 1, characterized in that: The cylinder body (1) has an inner cavity (17) inside, and a movable piston (18) is slidably arranged in the inner cavity (17). The movable piston (18) is connected to the bottom of the cylinder piston (2). A piston sealing ring (19) is arranged on the outside of the movable piston (18), and the outside of the piston sealing ring (19) abuts against the inner wall of the inner cavity (17). A vent hole (20) is opened on the top of the cylinder body (1), and the vent hole (20) is connected to the upper end of the inner cavity (17).

7. A concealed double-link clamping cylinder according to claim 6, characterized in that: A cover plate (21) is threadedly connected to the lower part of the inner cavity (17). A through hole (23) is provided in the middle of the cover plate (21), and an air pipe connector (24) is connected to the lower end of the through hole (23).

8. A concealed double-link clamping cylinder according to claim 7, characterized in that: A plug sealing ring (22) is provided between the cover plate (21) and the cylinder body (1).

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