US 12,404,971 B2
Battery-type grease gun capable of being loaded with various grease cartridges
Huabin Chen, Jinhua (CN); Yanqing Chen, Jinhua (CN); and Meizhen Lei, Jinhua (CN)
Assigned to JINGYAN MECHANICAL & ELECTRICAL TOOLS CO., LTD, JINHUA, Jinhua (CN)
Filed by JINGYAN MECHANICAL & ELECTRICAL TOOLS CO., LTD, JINHUA, Jinhua (CN)
Filed on Aug. 31, 2023, as Appl. No. 18/240,417.
Application 18/240,417 is a continuation of application No. PCT/CN2022/121156, filed on Sep. 25, 2022.
Claims priority of application No. 202111545607.4 (CN), filed on Dec. 17, 2021.
Prior Publication US 2023/0408028 A1, Dec. 21, 2023
Int. Cl. F16N 5/00 (2006.01)
CPC F16N 5/00 (2013.01) 4 Claims
OG exemplary drawing
 
1. A battery-type grease gun capable of being loaded with various grease cartridges, comprising
a main body shell,
wherein a holder is provided at a top of the main body shell, and a rear of the holder is provided with a battery mounting base configured to install a battery pack,
a motor, a transmission mechanism connecting with the motor and a plunger connecting with the transmission mechanism are provided inside the main body shell,
a convergence base and a grease cylinder are provided at a bottom of the main body shell, an end of the grease cylinder is matched with the convergence base by threaded connection, the other end of the grease cylinder is provided with a grease cylinder rotary cover by threaded connection,
the main body shell further comprises a ring-shaped support, wherein the ring-shaped support is configured to fix the grease cylinder,
a port of the convergence base is provided with a grease nozzle, the grease nozzle is connected to and in communication with an outlet tube,
the plunger is driven by the motor to reciprocate and squeeze grease in the convergence base, so that the grease spurts out from the grease nozzle and gets into the outlet tube,
wherein the grease cylinder is provided with a push rod,
the push rod is provided with a handle, the handle is connected to a thin and long pull rod, the pull rod extends through a center hole of the grease cylinder rotary cover,
an end of the pull rod away from the grease cylinder rotary cover is provided with a sealing ring, an inner side of the sealing ring is provided with an inner pressing plate of the sealing ring and a support frame of the sealing ring, respectively, an outer side of the sealing ring is provided with a washer and an outer pressing plate of the sealing ring, a compression spring is provided between the support frame of the sealing ring and the grease cylinder rotary cover,
the inner pressing plate of the sealing ring is separate from the support frame, and the washer is separate from the outer pressing plate of the sealing ring,
at least one set of fixing holes are symmetrically disposed on the sealing ring, the inner pressing plate of the sealing ring, the outer pressing plate of the sealing ring along a circumference around an axis of the sealing ring, respectively, at least one set of connecting members extend through the at least one set of fixing holes to connect the sealing ring, the inner pressing plate of the sealing ring, and the outer pressing plate of the sealing ring together,
a terminal of the end of the pull rod away from the grease cylinder rotary cover is provided with a cylindrical pin, and an opening configured to allow the cylindrical pin to extend through is provided at a center of the outer pressing plate of the sealing ring,
the sealing ring is a bowl-shaped structure made of rubber, a thickness at an edge of the sealing ring is less than a thickness of a middle of the sealing ring, and a diameter of the sealing ring is greater than an inner diameter of the grease cylinder, and
the grease cylinder rotary cover is provided with at least one air vent, and the at least one air vent is spaced from the center hole.