Rivet gun

Patent metadata

Field	Value
Publication number	US-10894285-B2
Application number	US-201916256079-A
Country	US
Kind code	B2
Filing date	Jan 24, 2019
Priority date	Oct 18, 2018
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A rivet gun includes a gun body and a spear detachably connected. The gun body has an axial negative pressure air chamber and an axial hydraulic chamber intercommunicating for gas pressure. The spear includes a connecting chamber communicating with the hydraulic chamber and a gun nozzle. A jaw chamber operating for nail-clamping purposes is adjacent to the gun nozzle. The hydraulic chamber has a piston and an elastic member attached to the piston, other end of the elastic member connecting to the negative pressure air chamber. The piston is coupled to a rod, the rod bears on the jaw chamber to move along the axis of the connecting chamber and thereby clamp on or release a riveting nail.

First claim

What is claimed is:

1. A rivet gun, comprising:
a gun body comprising a negative pressure air chamber and a hydraulic chamber co-axially arranged along an axis of the gun body, the negative pressure air chamber and the hydraulic chamber communicating with each other; and
a spear detachably connected with the gun body, the spear comprising a connecting chamber communicating with the hydraulic chamber and a gun nozzle connected with the connecting chamber, wherein
the connecting chamber comprises a jaw chamber adjacent to the gun nozzle, and the jaw chamber is around an axis of the connecting chamber;
the hydraulic chamber comprises an elastic member and a piston therein, opposite ends of the elastic member are respectively connected to the negative pressure air chamber and the piston;
an end of the piston that faces the spear is coupled to a rod, the rod extends towards the gun nozzle and extends into the jaw chamber, the jaw chamber is driven by the rod to move along the axis of the connecting chamber; and
the jaw chamber comprises claws configured for clamping a nail, the claws extend from a front end of the jaw chamber.

2. The rivet gun of claim 1 , wherein a float joint is between the jaw chamber and the connecting chamber, the float joint is movable along with the jaw chamber; the float joint defines a cone portion facing the gun nozzle, the cone portion is sunken from a front end of the float joint; when the claws are pressed by the cone portion to open, an end of the nail is inserted into the jaw chamber and clutched by the claws.

3. The rivet gun of claim 1 , wherein the connecting chamber communicates with an inlet tube, the inlet tube is configured to guide the nail into the spear, a guiding direction of the inlet tube faces the gun nozzle.

4. The rivet gun of claim 1 , wherein the piston comprises a hollow channel defined therein, the hollow channel of the piston communicates with a first outlet tube, the first outlet tube extends along an axis of the elastic member; the negative pressure air chamber comprises a second outlet tube defined therein; the first outlet tube and the second outlet tube communicate to expel a shaft of the nail.

5. The rivet gun of claim 4 , wherein the negative pressure air chamber is outwardly coupled with an outlet pipe, the outlet pipe comprises a control valve, the control valve is configured to adjust a gas pressure in the negative pressure air chamber.

6. The rivet gun of claim 5 , wherein the second outlet tube communicates with the outlet pipe, an end of the second outlet tube which is connected with the outlet pipe is cone shaped, an outlet hole is defined on the cone shaped end of the second outlet tube, the nail is delivered from the outlet hole and expelled out of the gun body through the outlet pipe.

7. The rivet gun of claim 1 , wherein the hydraulic chamber comprises a piping unit protruding in the radial direction of the hydraulic chamber, the piping unit is along an axial direction of the hydraulic chamber; the piping unit comprises an inlet pipe and a hydraulic pipe therein; the inlet pipe is configured to allow gas into the negative pressure air chamber; the hydraulic pipe is configured to force hydraulic oil in or out of the hydraulic chamber.

8. The rivet gun of claim 7 , wherein an inlet of the inlet pipe and an inlet of the hydraulic pipe are located at a same side of the piping unit adjacent to the negative pressure air chamber; an outlet of the inlet pipe is located at a side of the negative pressure air chamber which connects the hydraulic chamber; and an outlet of the hydraulic pipe is located at a side of the hydraulic chamber adjacent to the spear.

9. The rivet gun of claim 1 , wherein the gun nozzle comprises at least two nozzle portions, the nozzle portions are annularly distributed to collectively define the gun nozzle.

10. The rivet gun of claim 9 , wherein each of the nozzle portions is connected to a periphery of the spear by an elastic shaft, avoiding grooves are defined on the periphery of the spear, each of the avoiding grooves is corresponding to each of the nozzle portions, the avoiding grooves are configured to give way to the nozzle portions when the gun nozzle is opened.

Assignees

• Nanning Fugui Prec Ind Co Ltd

Inventors

• Li Ri-Meng
• Hsueh Chiung-Hsu

Classifications

• B21J15/043

  by pulling a mandrel · CPC title

• B21J15/105

  Portable riveters (pliers for riveting B21J15/386) · CPC title

• B21J15/22 Primary

  operated by both hydraulic or liquid pressure and gas pressure · CPC title

• B21J15/383 Primary

  Hand tools for riveting · CPC title

• B21J15/326

  Broken-off mandrel collection · CPC title