An oil injection apparatus includes: a storage unit extruding lubricating oil through an ejection hole formed at a lower end thereof; a discharge unit communicating with the storage through the ejection hole and discharging the lubricating oil outside according to a pumping operation; a plurality of discharge pumps arranged at regular intervals in a circumferential direction of the discharge unit and having respective first ends disposed in the discharge unit; and a driving unit rotating in a direction to sequentially press the first ends of the discharge pumps, which are disposed in the discharge unit, thereby causing the discharge pumps to perform the pumping operation in turn.

In an electric oil pump device including a drive power source and a gear device through which a vehicle drive force of the drive power source is transmitted, the electric oil pump device delivering a lubricant oil to the gear device, and generating a hydraulic pressure for controlling the gear device, a pump portion for delivering the lubricant oil, a motor portion for operating the pump portion, and a driver portion for controlling an operation of the motor portion are included. The pump portion, motor portion and driver portion are formed integrally with each other, or the driver portion is disposed adjacent to the motor portion. The pump portion and a part or an entirety of the motor portion are disposed within a space defined by an oil pan and a casing accommodating the gear device, and the driver portion is disposed outside the casing and the oil pan.

A portable reciprocating pump assembly delivers lubricant from a reservoir and includes a housing mountable on the reservoir and a pumping tube assembly for directing lubricant from the reservoir and into the housing. The tube assembly has a reciprocating plunger and a shovel assembly attached to the lower end of the plunger and having a disk member and a valve. A drive mechanism for operating the pumping tube assembly is disposed within the housing and includes a drive shaft and a cam mounted eccentrically on the shaft and disposed within an opening of a follower. The follower is coupled with the plunger such that rotation of the drive shaft reciprocates the plunger along a vertical axis. A motor is connected with the drive shaft and actuates the drive mechanism and a battery provides power to the motor such that the pump assembly operates without connection to a separate power source.

A drive device includes a gear unit, which is able to be driven by a motor and includes a pressure-lubrication system. The pressure-lubrication system has a distributor block, having a continuous longitudinal bore and continuous transverse bores. The distributor block is arranged as a single piece, in particular from metal such as steel or aluminum.

A lubrication system comprising a motor, a positive displacement pump driven by the motor, a lubricant container in fluid communication with the positive displacement pump and at least one lubricant outlet in fluid communication with the lubricant container. The positive displacement pump is arranged to carry out at least one discharge stroke to dispense lubricant from the at least one lubricant outlet when the lubrication system is in use. The lubrication system also comprises a control unit that is arranged to determine an amount of lubricant that is dispensed from the lubricant container via the at least one lubricant outlet when the lubrication system is in use. The control unit is arranged to monitor current supplied to the motor to obtain a motor current signal, and to determine a number of the discharge strokes from the motor current signal.

The present invention relates to an electric grease barrel pump that has a single pumping structure and has an automatic shift function performed by a manual operation of a valve for switching a grease supply line. The electric grease barrel pump comprises: a pumping means; a driving means; a supply pipe through which the grease is discharged from the pumping means; a distribution valve installed at an end of the supply pipe in a direction in which the grease is discharged; a magnetic switch, installed at a movable portion of the distribution valve, for outputting a signal for supplying the grease to a selected grease supply target of the plurality of grease supply targets according to an operating position of the movable portion; and a control unit for controlling the driving means to adjust grease discharge capability of the pumping means according to the signal of the magnetic switch.

An electric oil pump includes a motor part having a shaft; a pump part that is driven by the motor part via the shaft and discharges oil; and a control part configured to control an operation of the motor part. The motor part includes a rotor, a stator, and a motor housing in which the rotor and the stator are accommodated. The pump part includes a pump rotor attached to the shaft and a pump housing having a housing part in which the pump rotor is accommodated. The control part includes an electronic component and a board having a surface on which the electronic component is mounted. The board is disposed outside the stator in a radial direction and within a range of the motor part in the axial direction, and the surface of the board is disposed to face the stator and extends in the axial direction.

An electric oil pump includes a motor part having a shaft; a pump part that is driven by the motor part via the shaft and discharges oil; and a control part configured to control an operation of the motor part. The motor part includes a rotor, a stator, and a motor housing. The pump part includes a pump rotor and a pump housing having a housing part. The control part includes a plurality of electronic components and a board. The motor housing has a cylindrical part in which the rotor and the stator are accommodated, a plurality of heat dissipating fins that extend from the cylindrical part, and a fin support that supports the heat dissipating fins. The heat dissipating fins are disposed at intervals in the axial direction. The fin support has an inter-fin through-hole between a pair of heat dissipating fins adjacent in the axial direction.

This application relates to a battery operated grease gun comprising a body able to be connected to a container configured to store grease, the body defining first and second elongate chambers therein, the first chamber extending along a first axis and the second chamber extending along a second axis, the first axis being spaced from the second axis, and the second chamber having a smaller cross-sectional area than the first chamber; first and second pistons, the first piston configured to reciprocate within the first chamber along the first axis and the second piston configured to reciprocate within the second chamber along the second axis, the second piston having a smaller cross-sectional area than the first piston; a common grease channel, the common grease channel being disposed between the container and the first and second chambers such that the grease is able to flow from the container into the first and second chambers; an actuator connected to the body and moveable between a retracted position, whereby grease is able to flow through the common grease channel, and an engaged position, whereby grease is restricted from flowing through the common grease channel, the actuator being configured to cause reciprocation of the first piston and the second piston when moved between the engaged and retracted positions; and a grease outlet fluidically connected to the first and second chambers that allows for grease to be discharged from the grease gun. The battery operated grease gun may further comprise a high pressure/high flow switch in the form of a pressure-sensitive spool, bypass valve or gap-based bypass.

A lubrication system for supplying a lubricant to at least one lubrication point includes at least one lubricant line and at least one lubricant system component that is connected to the lubricant line. The lubrication system component includes at least one movable element and/or the lubricant line includes at least one movable portion. The system also includes at least one energy-generating element, such as a piezo element or a magnet and coil, configured to interact with the at least one movable element and generate energy from a movement of the at least one moveable element.