Pneumatic hydraulic double-action rivet gun

Abstract

The utility model provides a kind of pneumatic hydraulic double-action pull rivet gun, including gun body, the gun body includes cylinder body and pull head subassembly, the middle part of cylinder body is provided with power oil cylinder subassembly, the bottom of cylinder body is equipped with reversing valve subassembly, the top of cylinder body is installed pull head subassembly, one end of power oil cylinder subassembly is connected with piston by valve stem, cylinder body is also equipped with return oil cylinder subassembly, one end of power oil cylinder subassembly is connected on return oil cylinder subassembly, return oil cylinder subassembly and pull head subassembly are connected by communicating airway, the side of cylinder body is provided with compressed gas inlet;The utility model is by using compressed air as power source, using the mode of pneumatic hydraulic to realize rivet pull rivet and back rivet, realize high pulling force, reduce the sealing requirement of oil cylinder and cylinder, reduce leakage problem, simultaneously adopt return to use oil pressure to push, reduce the phenomenon of rivet.

Description

Technical Field

[0001] This utility model belongs to the field of rivet guns, specifically a pneumatic-hydraulic double-action rivet gun. Background Technology

[0002] Currently, there are many types of rivet guns on the market. However, due to the small pulling force of pure pneumatic or manual rivets, it is difficult to complete the riveting work of high-strength rivets. Rivet guns using pneumatic and hydraulic methods often have sealing issues between multiple cylinders and oil cylinders, which frequently leads to oil leakage problems. In addition, the pneumatic return stroke has a small return force, which can cause rivets to get stuck for thicker or harder materials.

[0003] In summary, this utility model provides a pneumatic-hydraulic double-action rivet gun to solve the above problems. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a pneumatic-hydraulic double-acting rivet gun, which solves the problems in the prior art where the pneumatic return stroke has a small return force, and where rivets that are thicker or harder in material may get stuck.

[0005] A pneumatic-hydraulic double-action riveting gun includes a gun body, which comprises a cylinder and a riveting head assembly. A power cylinder assembly is disposed in the middle of the cylinder body, and a reversing valve assembly is installed at the bottom of the cylinder body. The riveting head assembly is installed at the top of the cylinder body. One end of the power cylinder assembly is connected to a piston via a valve stem. A return cylinder assembly is also installed in the cylinder body, and one end of the power cylinder assembly is connected to the return cylinder assembly. The return cylinder assembly and the riveting head assembly are connected via a connecting air passage. A compressed gas inlet is provided on one side of the cylinder body, and the compressed gas inlet is connected to the reversing valve assembly. A button assembly is installed on one side of the gun body.

[0006] Furthermore, the bottom of the cylinder body is provided with a piston chamber, the piston is disposed in the piston chamber, a cylinder head is installed in the piston chamber, and a cylinder bottom cover is installed at the bottom of the cylinder body.

[0007] Furthermore, the valve stem of the power cylinder assembly is connected to the piston via a lock nut, and a gasket is provided between the lock nut and the piston. The surface of the piston contacts the inner wall of the piston chamber through a star-shaped sealing ring and a polytetrafluoroethylene gasket.

[0008] Furthermore, an isolation plug is installed on the surface of the valve stem of the power cylinder assembly, and the isolation plug is located at the top of the piston chamber.

[0009] Furthermore, the reversing valve assembly includes a valve body and a reversing valve stem. A gas passage is provided in the middle of the reversing valve stem. A valve sleeve through hole and a valve stem through hole are provided on one side of the valve body. The valve stem through hole communicates with the valve sleeve through hole. The reversing valve assembly also includes a cylinder pipeline. One end of the cylinder pipeline is connected to the bottom of the piston chamber.

[0010] Furthermore, a plastic cap and a filter plug are installed at the bottom of the reversing valve assembly.

[0011] Furthermore, a hydraulic oil passage is installed inside the cylinder, which is connected to the air exchange valve assembly and the button assembly respectively, and the hydraulic oil passage is filled with hydraulic oil.

[0012] Furthermore, a puller channel is also installed inside the cylinder body, which connects the power cylinder assembly and the puller assembly.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model uses compressed air as a power source and employs pneumatic and hydraulic methods to achieve the pulling and unpulling of rivets. This achieves high pulling force while reducing the sealing requirements of the oil cylinder and air cylinder, thus reducing leakage problems. At the same time, the return stroke is driven by hydraulic pressure, which reduces the phenomenon of rivet jamming.

[0015] 2. This utility model ensures the smoothness and force of the rivet removal process by adopting a hydraulic dual-action mode; the pneumatic hydraulic riveting method is stable and gentle, the rivet is fully formed, and the noise is low; the air inlet has a built-in pneumatic sequence valve design, which can automatically change the compressed air access space by pressing the button to realize the automatic reset of the rivet gun.

[0016] 3. This utility model features smooth operation and stable rivet removal through the use of a hydraulic dual-action mode. The pneumatic-hydraulic power mode greatly increases the pulling force, enabling it to complete tasks that conventional rivet guns cannot. The hydraulic dual-action mode reduces oil leakage, ensuring stable and gentle rivet action, full rivet formation, and low noise. It is ergonomically designed, compact in appearance, and has a comfortable handle. With different rivet heads, it is suitable for various working conditions. The air inlet has a built-in pneumatic sequence valve design, which automatically changes the compressed air access space by pressing a button, achieving automatic reset of the rivet gun. Attached Figure Description

[0017] Figure 1 This is a perspective view of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3 This is a three-dimensional cross-sectional view of the interior of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the reversing valve assembly of this utility model.

[0021] In the picture:

[0022] 1. Pull head assembly; 2. Button assembly; 3. Cylinder body; 4. Power cylinder assembly; 5. Isolation plug; 6. Piston; 7. Star-shaped seal; 8. PTFE gasket; 9. Gasket; 10. Locking nut; 11. Cylinder head; 12. Cylinder bottom cover; 13. Air filter plug; 14. Plastic cover; 15. Directional valve assembly; 16. Hydraulic oil; 17. Return cylinder assembly; 18. Valve stem through hole; 19. Valve sleeve through hole; 20. Directional valve stem. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] like Figures 1-4 As shown, this utility model provides a pneumatic-hydraulic double-action riveting gun, including a gun body, which includes a cylinder 3 and a riveting head assembly 1. A power cylinder assembly 4 is provided in the middle of the cylinder 3, and a reversing valve assembly 15 is installed at the bottom of the cylinder 3. The riveting head assembly 1 is installed on the top of the cylinder 3. One end of the power cylinder assembly 4 is connected to a piston 6 through a valve stem. A return cylinder assembly 17 is also installed in the cylinder 3. One end of the power cylinder assembly 4 is connected to the return cylinder assembly 17. The return cylinder assembly 17 and the riveting head assembly 1 are connected through a connecting air passage. A compressed gas inlet is provided on one side of the cylinder 3, and the compressed gas inlet is connected to the reversing valve assembly 15. A button assembly 2 is installed on one side of the gun body.

[0025] In one embodiment of this utility model, the bottom of the cylinder body 3 is provided with a piston chamber, the piston 6 is disposed in the piston chamber, the cylinder head 11 is installed in the piston chamber, and the bottom of the cylinder body 3 is provided with a cylinder bottom cover 12.

[0026] In one embodiment of this utility model, the valve stem of the power cylinder assembly 4 is connected to the piston 6 by a lock nut 10. A gasket 9 is provided between the lock nut 10 and the piston 6. The surface of the piston 6 is in contact with the inner wall of the piston cavity through a star-shaped sealing ring 7 and a polytetrafluoroethylene gasket 8.

[0027] In one embodiment of this utility model, an isolation plug 5 is installed on the surface of the valve stem of the power cylinder assembly 4, and the isolation plug 5 is located at the top of the piston chamber.

[0028] As one embodiment of the present invention, the reversing valve assembly 15 includes a valve body and a reversing valve stem 20. A gas passage is provided in the middle of the reversing valve stem 20. A valve sleeve through hole 19 and a valve stem through hole 18 are provided on one side of the valve body. The valve stem through hole 18 communicates with the valve sleeve through hole 19. The reversing valve assembly 15 also includes a cylinder pipeline. One end of the cylinder pipeline is connected to the bottom of the piston chamber.

[0029] As one embodiment of this utility model, a plastic cover 14 and a filter plug 13 are installed at the bottom of the reversing valve assembly 15.

[0030] As one embodiment of this utility model, a hydraulic oil passage is installed inside the cylinder body 3. The hydraulic oil passage is connected to the air exchange valve assembly and the button assembly 2 respectively. The hydraulic oil passage is filled with hydraulic oil 16.

[0031] As one embodiment of this utility model, a pull head channel is also installed inside the cylinder body 3, and the pull head channel connects the power cylinder assembly 4 and the pull head assembly.

[0032] The gun body is made of all-aluminum alloy, making it lightweight.

[0033] The riveting action is completed by the piston pushing the cylinder and amplifying the force at the riveting head through the hydraulic cylinder. After the riveting is completed, the hydraulic oil is pumped into the return piston chamber through the return cylinder to realize the return action of the riveting gun.

[0034] Connect the compressed gas line to the rivet gun. When the button assembly 2 is pressed inwards towards the cylinder 3, the piston 6 in the cylinder 3 moves downwards along the vertical direction of the cylinder 3, compressing the hydraulic oil in the cylinder 3 and pressing it into the rivet head assembly 1 along the rivet head channel. At this time, the hydraulic oil on the left side of the working head in the rivet head assembly 1 is pushed into the return cylinder assembly 17 along the connecting air passage and compresses the spring. The hydraulic oil then pushes the piston rod of the working head along the internal channel of the rivet head assembly 1 to complete the rivet pulling action. Afterwards, the operator releases the button assembly 2, and the piston 6 in the cylinder 3 moves along the middle of the cylinder 3. At the same time, the return cylinder assembly 17 pushes the hydraulic oil in the cylinder into the working head of the rivet head assembly 1 along the connecting air passage, so that the piston rod moves along the rivet head assembly 1 to complete the rivet retraction and reset action.

[0035] Working principle of the reversing valve: When no compressed gas is connected, the valve body is reset by the action of the spring. When compressed gas is connected, the gas passes through the middle gas channel of the reversing valve stem 20, causing the air pressure below the valve stem to rise, pushing the spring to compress. At this time, the valve stem rises, and the valve stem through hole 18 and the valve sleeve through hole 19 connect, allowing gas to enter the valve body and then through the pipeline to the air port at the bottom of the cylinder, pushing the piston upward and completing the piston reset. If the button assembly 2 is pressed at this time, the hydraulic oil channel opens, the pressure pushing the reversing valve stem 20 upward is unloaded, the spring returns to its original length, and the reversing valve stem 20 is pushed downward. The cavity in the reversing valve is directly connected to the compressed air, pushing the cylinder piston downward through the air pipe. At this time, the cylinder at the lower end of the rivet gun is connected to the hydraulic oil channel through the valve sleeve through hole 19 and connected to the valve body pipeline, allowing gas to be introduced into the atmosphere, thus realizing the gas reversal.

[0036] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A pneumatic-hydraulic double-action rivet gun, comprising a gun body, the gun body including a cylinder (3) and a rivet head assembly (1), characterized in that, A power cylinder assembly (4) is provided in the middle of the cylinder body (3). A reversing valve assembly (15) is installed at the bottom of the cylinder body (3). The pull head assembly (1) is installed at the top of the cylinder body (3). One end of the power cylinder assembly (4) is connected to a piston (6) through a valve stem. A return cylinder assembly (17) is also installed in the cylinder body (3). One end of the power cylinder assembly (4) is connected to the return cylinder assembly (17). The return cylinder assembly (17) and the pull head assembly (1) are connected through a connecting air passage. A compressed gas inlet is provided on one side of the cylinder body (3). The compressed gas inlet is connected to the reversing valve assembly (15). A button assembly (2) is installed on one side of the gun body.

2. The pneumatic-hydraulic double-action rivet gun as described in claim 1, characterized in that, The bottom of the cylinder body (3) is provided with a piston chamber, the piston (6) is located in the piston chamber, the cylinder head (11) is installed in the piston chamber, and the bottom of the cylinder body (3) is provided with a cylinder bottom cover (12).

3. The pneumatic-hydraulic double-action rivet gun as described in claim 2, characterized in that, The valve stem of the power cylinder assembly (4) is connected to the piston (6) by a lock nut (10). A gasket (9) is provided between the lock nut (10) and the piston (6). The surface of the piston (6) is in contact with the inner wall of the piston chamber through a star-shaped sealing ring (7) and a polytetrafluoroethylene gasket (8).

4. The pneumatic-hydraulic double-action rivet gun as described in claim 2, characterized in that, An isolation plug (5) is installed on the surface of the valve stem of the power cylinder assembly (4), and the isolation plug (5) is located at the top of the piston chamber.

5. The pneumatic-hydraulic double-action rivet gun as described in claim 1, characterized in that, The reversing valve assembly (15) includes a valve body and a reversing valve stem (20). A gas passage is provided in the middle of the reversing valve stem (20). A valve sleeve through hole (19) and a valve stem through hole (18) are provided on one side of the valve body. The valve stem through hole (18) communicates with the valve sleeve through hole (19). The reversing valve assembly (15) also includes a cylinder pipeline. One end of the cylinder pipeline is connected to the bottom of the piston chamber.

6. The pneumatic-hydraulic double-action rivet gun as described in claim 1, characterized in that, The bottom of the reversing valve assembly (15) is fitted with a plastic cap (14) and a filter plug (13).

7. The pneumatic-hydraulic double-action rivet gun as described in claim 1, characterized in that, A hydraulic oil passage is installed inside the cylinder (3), which is connected to the air exchange valve assembly and the button assembly (2) respectively, and is filled with hydraulic oil (16).

8. The pneumatic-hydraulic double-action rivet gun as described in claim 1, characterized in that, The cylinder body (3) is also equipped with a pull head channel, which connects the power cylinder assembly (4) and the pull head assembly.

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