Dual-branch combined plunger pump with built-in oil circuit and riveting tool

Abstract

The present disclosure discloses a dual-branch combined plunger pump with a built-in oil circuit and a riveting tool, and relates to the technical field of riveting tools. In a first aspect, a dual-branch combined plunger pump with a built-in oil circuit includes a pump body, a plunger is arranged in the pump body, a plunger chamber is arranged in the pump body, and an oil inlet is arranged on a wall surface. In a second aspect, a riveting tool includes a main body, a plunger port is arranged on the main body, and the main body is in a sealed connection with the above-mentioned dual-branch combined plunger pump with a built-in oil circuit on a wall surface. The present disclosure does require an oil pipe to connect the oil tank and the combined plunger pump, which effectively reduces the risk of oil leakage.

What is claimed is: 
     
         1 . A dual-branch combined plunger pump with a built-in oil circuit, adapted for outputting oil to drive movement of a piston in a riveting work head, comprising a pump body ( 1 ), a plunger being arranged in the pump body ( 1 ), and a plunger chamber for the plunger to move being arranged in the pump body ( 1 ), wherein the pump body ( 1 ) is provided with an oil inlet ( 2 ) on a wall surface where an outlet of the plunger chamber is located, the oil inlet ( 2 ) is adapted to communicate with a crankshaft chamber ( 18 ) in a main body ( 17 ). 
     
     
         2 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 1 , wherein the pump body ( 1 ) is provided with a boss ( 3 ) for embedding into the crankshaft chamber ( 18 ) in the main body ( 17 ), and the outlet of the plunger chamber and the oil inlet ( 2 ) are both arranged on the boss ( 3 ). 
     
     
         3 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 2 , wherein an oil inlet channel ( 4 ) is arranged between the oil inlet ( 2 ) and the plunger chamber, the plunger chamber is communicated with an oil outlet channel, and an outlet of the oil outlet channel faces outward from the pump body ( 1 ) in a same direction as the oil inlet ( 2 ). 
     
     
         4 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 3 , wherein the plunger comprises a high-pressure pump plunger ( 5 ) and a low-pressure pump plunger ( 6 ), the plunger chamber comprises a high-pressure chamber ( 7 ) for the high-pressure pump plunger to move and a low-pressure chamber ( 8 ) for the low-pressure pump plunger ( 6 ) to move, the oil inlet channel ( 4 ) is communicated with the low-pressure chamber ( 8 ), the oil outlet channel comprises a high-pressure oil outlet circuit ( 9 ) and a low-pressure oil outlet circuit ( 10 ), the low-pressure oil outlet circuit ( 10 ) is only communicated with the low-pressure chamber ( 8 ), and the low-pressure chamber ( 8 ) and the high-pressure chamber ( 7 ) are both communicated with the high-pressure oil outlet circuit ( 9 ). 
     
     
         5 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 4 , wherein the outlet of the oil outlet channel comprises a low-pressure oil outlet ( 12 ) and a high-pressure oil outlet ( 11 ), the low-pressure oil outlet ( 12 ) is communicated with the low-pressure oil outlet circuit ( 10 ), the high-pressure oil outlet ( 11 ) is communicated with the high-pressure oil outlet circuit ( 9 ), and the low-pressure oil outlet ( 12 ) and the high-pressure oil outlet ( 11 ) are both located on a face of the pump body ( 1 ) on which the boss ( 3 ) is located. 
     
     
         6 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 5 , wherein the oil inlet channel ( 4 ) is arranged with an oil inlet check valve ( 13 ) that allows oil to be transported only from the oil inlet ( 2 ) to the low-pressure chamber ( 8 ), the low-pressure oil outlet circuit ( 10 ) is arranged with a low-pressure pressurized oil check valve ( 14 ) that allows the oil to be transported only from the low-pressure chamber ( 8 ) to the low-pressure oil outlet ( 12 ), and the high-pressure oil outlet circuit ( 9 ) is arranged with a transition check valve ( 15 ) located between the low-pressure chamber ( 8 ) and the high-pressure chamber ( 7 ) that allows the oil to be transported only from the low-pressure chamber ( 8 ) to the high-pressure chamber ( 7 ), and a high-pressure pressurized oil check valve ( 16 ) located between the high-pressure chamber ( 7 ) and the high-pressure oil outlet ( 11 ) that allows the oil to be transported only from the high-pressure chamber ( 7 ) to the high-pressure oil outlet ( 11 ). 
     
     
         7 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 4 , wherein the oil inlet ( 2 ) is located between an outlet of the high-pressure chamber ( 7 ) and an outlet of the low-pressure chamber ( 8 ) on the boss ( 3 ). 
     
     
         8 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 7 , wherein the oil inlet channel ( 4 ) is arranged in parallel with the high-pressure chamber ( 7 ) and the low-pressure chamber ( 8 ), the oil inlet channel ( 4 ) is located between the high-pressure chamber ( 7 ) and the low-pressure chamber ( 8 ), and an end of the oil inlet channel ( 4 ) away from the oil inlet ( 2 ) is communicated with the low-pressure chamber ( 8 ). 
     
     
         9 . The dual-branch combined plunger pump with a built-in oil circuit as claimed in  claim 8 , wherein an inner diameter of the low-pressure chamber ( 8 ) is larger than an inner diameter of the high-pressure chamber ( 7 ), and the low-pressure oil outlet circuit ( 10 ) and the high-pressure oil outlet circuit ( 9 ) are respectively located on opposite sides of an integrated structured formed by the low-pressure chamber ( 8 ), the oil inlet channel ( 4 ) and the high-pressure chamber ( 7 ). 
     
     
         10 . A riveting tool, comprising a main body ( 17 ), wherein a crankshaft chamber ( 18 ) and an oil tank ( 20 ) are arranged in the main body ( 17 ), the oil tank ( 20 ) is communicated with the crankshaft chamber ( 18 ), a plunger port ( 19 ) for movement of a plunger is provided on a side face of the main body ( 17 ), the main body ( 17 ) is in a sealed connection with the dual-branch combined plunger pump with a built-in oil circuit as claimed in any one of  claims 1  on a wall surface where the plunger port ( 19 ) is located, and the oil inlet ( 2 ) is communicated with the crankshaft chamber ( 18 ).