Rivet gun driving mechanism

Abstract

The utility model relates to a rivet gun driving mechanism which comprises a grab handle, an air cylinder is arranged at the bottom end of the grab handle, a gun body shell is arranged at the top end of the grab handle, an outer sleeve is arranged at one end of the gun body shell, a rivet mechanism is arranged in the outer sleeve, one end of the rivet mechanism is connected with a piston, and the piston divides the gun body shell into a pulling cavity and a reset cavity. A first ventilation pipeline and a second ventilation pipeline are arranged on the gun body shell, the air cylinder is communicated with the first ventilation pipeline, a first electromagnetic valve and a second electromagnetic valve are correspondingly arranged at the two ends of the first ventilation pipeline, a third electromagnetic valve and a fourth electromagnetic valve are correspondingly arranged at the two ends of the second ventilation pipeline, and the second ventilation pipeline is further communicated with the outside. The trigger switch assembly is arranged on the grab handle, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be opened and closed by pulling the trigger switch assembly, so that the piston is controlled to drive the rivet pulling mechanism to pull a rivet and reset, a reset spring is not needed, and the service life of the rivet gun is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of rivet guns, and more specifically, to a rivet gun drive mechanism. Background Technology

[0002] Rivet guns are widely used in riveting aluminum, iron, and stainless steel sheets. Rivet guns are driven by manual, pneumatic, or hydraulic means to move the gun head and install rivets onto structural components, thereby achieving connection and fixation.

[0003] Existing rivet guns mainly use a pneumatic structure to pull rivets. After pulling the rivet, the rivet pulling mechanism of the rivet gun is reset by the force of the return spring. However, the return spring overcomes the resistance of the cylinder to reset, resulting in a slow reset speed. Furthermore, the return spring is prone to reaching its fatigue limit, which can damage the rivet gun and shorten the overall service life of the rivet gun. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, a rivet gun drive mechanism is provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a rivet gun driving mechanism, including a handle, a cylinder at the bottom end of the handle, a gun body shell at the top end of the handle, an outer sleeve at one end of the gun body shell, a rivet pulling mechanism inside the outer sleeve, one end of the rivet pulling mechanism extending into the gun body shell and connected to a piston, the piston dividing the gun body shell into a pulling chamber and a resetting chamber, a first vent pipe and a second vent pipe connected to the pulling chamber and the resetting chamber on the gun body shell, the cylinder being connected to the first vent pipe, a first solenoid valve and a second solenoid valve being correspondingly provided at both ends of the first vent pipe, a third solenoid valve and a fourth solenoid valve being correspondingly provided at both ends of the second vent pipe, the second vent pipe also being connected to the outside, a trigger switch assembly on the handle, and a limit mechanism inside the gun body shell to prevent the piston from blocking the outlet of the first vent pipe and the second vent pipe located in the resetting chamber.

[0006] Preferably, the trigger switch assembly includes a circuit board and a trigger switch electrically connected to the circuit board. The circuit board is disposed inside the grip, and the trigger switch is disposed on the circuit board. One end of the trigger switch extends out of the grip. The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all electrically connected to the circuit board. The circuit board is a circuit board containing a battery.

[0007] Preferably, the battery of the circuit board is a rechargeable battery, and the handle is provided with a charging interface that is electrically connected to the circuit board.

[0008] Preferably, the handle is also provided with a knob for controlling the flow rate of the first solenoid valve, and the knob is electrically connected to the circuit board.

[0009] Preferably, the reset cavity is provided with a reset spring for assisting piston reset, and the two ends of the reset spring abut against the inner side wall of the piston and the gun body shell away from the outer sleeve.

[0010] Preferably, the piston has a groove at the end away from the pull pin mechanism, and one end of the return spring abuts against the inner bottom surface of the groove.

[0011] Preferably, the limiting mechanism includes a limiting rod, which is disposed on the inner wall of the gun body shell opposite to the piston.

[0012] Preferably, the rivet mechanism includes a limiting block, a rivet nozzle, and a sliding shaft that slides inside the outer sleeve. The limiting block is located at one end of the outer sleeve away from the gun body shell. A connecting shaft is located at one end of the sliding shaft away from the gun body shell. The connecting shaft is connected to the rivet nozzle. The end of the rivet nozzle away from the connecting shaft abuts against the limiting block. The other end of the sliding shaft extends into the gun body shell and is connected to the piston.

[0013] The beneficial effects of this utility model are as follows: When using this rivet gun, pulling the trigger switch assembly controls the opening of the first and fourth solenoid valves, allowing compressed air from the cylinder to flow into the pulling chamber, while air in the reset chamber flows out from the fourth solenoid valve, thus causing the piston to move. The piston drives the rivet pulling mechanism to pull the rivet. After pulling the rivet, during the process of releasing the trigger switch assembly, the first and fourth solenoid valves close, while the second and third solenoid valves open, allowing compressed air from the cylinder to flow into the reset chamber, while air in the pulling chamber flows out from the third solenoid valve, thus causing the piston to drive the rivet pulling mechanism to reset. This eliminates the need for a reset spring and improves the service life of the rivet gun. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the gun body shell and the internal structure of the outer sleeve in an embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the handle in an embodiment of this utility model.

[0016] Reference numerals: 1. Grip; 2. Cylinder; 3. Gun body shell; 30. First ventilation pipe; 31. Second ventilation pipe; 32. First solenoid valve; 33. Second solenoid valve; 34. Third solenoid valve; 35. Fourth solenoid valve; 4. Outer sleeve; 5. Pull-tab mechanism; 50. Limiting block; 51. Pull-tab nozzle; 52. Sliding shaft; 53. Connecting shaft; 6. Piston; 60. Groove; 7. Trigger switch assembly; 70. Circuit board; 71. Trigger switch; 72. Battery; 73. Charging interface; 74. Knob; 8. Limiting rod; 9. Return spring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In addition, the directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. The directional terms are used to better and more clearly explain and understand this utility model, and are not intended to indicate or imply the necessary orientation of this utility model. Therefore, they should not be construed as limitations on this utility model.

[0018] Examples of embodiments of this utility model Figures 1 to 2As shown, a rivet gun drive mechanism includes a handle 1, a cylinder 2 at the bottom of the handle 1, and a gun body shell 3 at the top of the handle 1. An outer sleeve 4 is located at one end of the gun body shell 3, positioned on the right side. A rivet pulling mechanism 5 is housed within the outer sleeve 4, with one end extending into the gun body shell 3 and connected to a piston 6. The piston 6 divides the gun body shell 3 into a pulling chamber and a resetting chamber. The piston 6 has a T-shaped cross-section, dividing the gun body shell 3 into a right-side pulling chamber and a left-side resetting chamber. A first vent pipe 30 and a second vent pipe 31, connecting the pulling chamber and the resetting chamber, are provided on the gun body shell 3. The first vent pipe 30 is located within the upper side wall of the gun body shell 3, and the second vent pipe 31 is located within the lower side wall of the gun body shell 3. Alternatively, the first vent pipe 30 and the second vent pipe 31 can be pipes located on the outer side wall of the gun body shell 3. The cylinder 2 is connected to the first vent pipe 30. The first ventilation pipe 30 is provided with a first solenoid valve 32 and a second solenoid valve 33 at both ends. The first solenoid valve 32 is located at the outlet of the first ventilation pipe 30 in the pulling chamber, and the second solenoid valve 33 is located at the outlet of the first ventilation pipe 30 in the reset chamber. The second ventilation pipe 31 is provided with a third solenoid valve 34 and a fourth solenoid valve 35 at both ends. The third solenoid valve 34 is located at the outlet of the second ventilation pipe 31 in the pulling chamber, and the fourth solenoid valve 35 is located at the outlet of the second ventilation pipe 31 in the reset chamber. The second ventilation pipe 31 is also connected to the outside. Preferably, a dustproof screen is provided in the outlet of the second ventilation pipe 31 that is connected to the outside, so as to prevent dust from entering the rivet gun and affecting the operation of the rivet gun. A trigger switch assembly 7 is provided on the handle 1. A limit mechanism is provided in the gun body shell 3. The limit mechanism is used to prevent the piston 6 from blocking the outlet of the first ventilation pipe 30 and the second ventilation pipe 31 in the reset chamber.

[0019] When using this rivet gun, pulling the trigger switch assembly 7 opens the first solenoid valve 32 and the fourth solenoid valve 35, allowing compressed air from cylinder 2 to flow into the pulling chamber. Air from the reset chamber flows out from the fourth solenoid valve 35. The air pressure in the pulling chamber is greater than that in the reset chamber, causing piston 6 to move. Piston 6 drives the rivet mechanism 5 to pull the rivet. At this time, the space in the pulling chamber is greater than that in the reset chamber. After pulling the rivet, when the trigger switch assembly 7 is released, the first solenoid valve 32 and the fourth solenoid valve 35 close, while the second solenoid valve 33 and the third solenoid valve 34 open, allowing compressed air from cylinder 2 to flow into the reset chamber. Air from the pulling chamber flows out from the third solenoid valve 34. The air pressure in the reset chamber is greater than that in the pulling chamber, causing piston 65 to drive the rivet mechanism to reset. This eliminates the need for a reset spring, improving the service life of the rivet gun.

[0020] Further improvements, such as Figure 1 and Figure 2 As shown, the trigger switch assembly 7 includes a circuit board 70 and a trigger switch 71 electrically connected to the circuit board 70. The circuit board 70 is disposed inside the grip 1, and the trigger switch 71 is disposed on the circuit board 70. One end of the trigger switch 71 extends out of the grip 1, and the right end of the trigger switch 71 extending out of the grip 1 is located near the gun body shell 3. The first solenoid valve 32, the second solenoid valve 33, the third solenoid valve 34, and the fourth solenoid valve 35 are all electrically connected to the circuit board 70. The circuit board 70 is a circuit board 70 containing a battery 72.

[0021] Further improvements, such as Figure 1 and Figure 2 As shown, the battery 72 of the circuit board 70 is a rechargeable battery, and the handle 1 is provided with a charging interface 73 that is electrically connected to the circuit board 70, so there is no need to replace the battery 72, which is more environmentally friendly.

[0022] Further improvements, such as Figure 1 and Figure 2 As shown, the handle 1 is also provided with a knob 74 for controlling the flow rate of the first solenoid valve 32. The knob 74 is electrically connected to the circuit board 70, that is, the knob 74 is electrically connected to the first solenoid valve 32 through the circuit board 70. By controlling the flow rate of the first solenoid valve 32 through the knob 74, the rivet pulling speed of this rivet gun can be controlled according to the thickness of the board material, so as to prevent the rivet pulling speed from being too fast and causing damage to thinner boards.

[0023] Further improvements, such as Figure 1 and Figure 2 As shown, a reset spring 9 is provided in the reset chamber to assist the piston 6 in resetting. The two ends of the reset spring 9 are in contact with the inner side wall of the piston 6 and the gun body shell 3 away from the outer sleeve 4. The reset spring 9 assists the piston 6 in resetting to the correct position and prevents the piston 6 from resetting incompletely. The reset spring 9 is always in a compressed state.

[0024] Further improvements, such as Figure 1 and Figure 2 As shown, the piston 6 has a groove 60 at the end away from the rivet mechanism 5, and one end of the return spring 9 abuts against the inner bottom surface of the groove 60. The groove 60 facilitates the installation of the return spring 9 and prevents the return spring 9 from bending when compressed.

[0025] Further improvements, such as Figure 1 and Figure 2As shown, the limiting mechanism includes a limiting rod 8, which is disposed on the inner wall of the gun body shell 3 opposite to the piston 6. Preferably, the end of the return spring 9 away from the groove 60 is sleeved on the limiting rod 8. When pulling the nail, the limiting rod 8 is inserted into the groove 60. After the limiting rod 8 abuts against the bottom of the groove 60, it restricts the piston 6 from continuing to drive the nail pulling mechanism 5 to pull the nail, while preventing the piston 6 from blocking the outlet of the first ventilation pipe 30 and the second ventilation pipe 31 located in the reset cavity.

[0026] Further improvements, such as Figure 1 and Figure 2 As shown, the rivet pulling mechanism 5 includes a limiting block 50, a rivet nozzle 51, and a sliding shaft 52 that slides within the outer sleeve 4. The limiting block 50 is located at the end of the outer sleeve 4 away from the gun body shell 3, and restricts the movement of the rivet during rivet pulling. The sliding shaft 52 is provided with a connecting shaft 53 at the end away from the gun body shell 3. The connecting shaft 53 is connected to the rivet nozzle 51. The end of the rivet nozzle 51 away from the connecting shaft 53 abuts against the limiting block 50. The rivet nozzle 51 clamps the rivet pull rod and simultaneously pulls the pull rod, thereby performing the rivet pulling process. That is, the right end of the rivet nozzle 51 abuts against the limiting block 50. The other end of the sliding shaft 52 extends into the gun body shell 3 and is connected to the piston 6. That is, the left end of the sliding shaft 52 extends into the gun body shell 3 and is connected to the piston 6.

[0027] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A rivet gun drive mechanism, comprising a handle, characterized in that, A cylinder is provided at the bottom of the grip; a gun body shell is provided at the top of the grip; an outer sleeve is provided at one end of the gun body shell; a pull pin mechanism is provided inside the outer sleeve; one end of the pull pin mechanism extends into the gun body shell and is connected to a piston; the piston divides the gun body shell into a pulling chamber and a resetting chamber; a first vent pipe and a second vent pipe are provided on the gun body shell, connecting the pulling chamber and the resetting chamber; the cylinder is connected to the first vent pipe; a first solenoid valve and a second solenoid valve are respectively provided at both ends of the first vent pipe; a third solenoid valve and a fourth solenoid valve are respectively provided at both ends of the second vent pipe; the second vent pipe is also connected to the outside; a trigger switch assembly is provided on the grip; a limit mechanism is provided inside the gun body shell, the limit mechanism being used to prevent the piston from blocking the outlet of the first vent pipe and the second vent pipe located in the resetting chamber.

2. The rivet gun drive mechanism according to claim 1, characterized in that, The trigger switch assembly includes a circuit board and a trigger switch electrically connected to the circuit board; the circuit board is disposed inside the grip; the trigger switch is disposed on the circuit board; one end of the trigger switch extends out of the grip; the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are all electrically connected to the circuit board; the circuit board is a circuit board containing a battery.

3. The rivet gun drive mechanism according to claim 2, characterized in that, The circuit board is powered by a rechargeable battery; the handle is equipped with a charging interface that is electrically connected to the circuit board.

4. A rivet gun driving mechanism according to claim 2, characterized in that, The handle is also equipped with a knob for controlling the flow rate of the first solenoid valve; the knob is electrically connected to the circuit board.

5. A rivet gun driving mechanism according to claim 1, characterized in that, The reset chamber is equipped with a reset spring to assist the piston in resetting; the two ends of the reset spring abut against the inner side wall of the piston and the gun body shell away from the outer sleeve.

6. A rivet gun driving mechanism according to claim 5, characterized in that, The piston has a groove at the end away from the rivet mechanism; one end of the return spring abuts against the inner bottom surface of the groove.

7. A rivet gun drive mechanism according to claim 1, characterized in that, The limiting mechanism includes a limiting rod; the limiting rod is disposed on the inner wall of the gun body shell opposite to the piston.

8. A rivet gun drive mechanism according to claim 1, characterized in that, The rivet mechanism includes a limiting block, a rivet nozzle, and a sliding shaft that slides within the outer sleeve. The limiting block is located at one end of the outer sleeve away from the gun body shell. A connecting shaft is located at one end of the sliding shaft away from the gun body shell. The connecting shaft is connected to the rivet nozzle. One end of the rivet nozzle away from the connecting shaft abuts against the limiting block. The other end of the sliding shaft extends into the gun body shell and is connected to the piston.

Images