JPH0529600Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device that automatically supplies lubricant to sliding parts such as bearings.

[Prior Art] A conventional lubricant dispensing device discharges lubricant such as grease stored in a container using gas pressure from a spring, compressed air, or a gas generator to prevent sliding of bearings, sliding surfaces, etc. It supplied lubricant to moving parts.

[Problem to be solved by the invention] Conventional lubricant dispensing devices are configured as described above, so it is not possible to control the amount of lubricant discharged, and the lubricant may be exhausted quickly by discharging a large amount, or the lubricant may be exhausted quickly. If the amount is too small, the sliding parts may seize, making it impossible to obtain the desired lubricated state of the sliding parts. The discharge amount may also be controlled using a motor that can control the number of rotations (stepping motor), but if you try to obtain a predetermined pressing force against the lubricant, the device becomes large and the motor drive force is required outside the device. There were problems such as the need for a separate power source to supply the power.

This invention was made to solve the above-mentioned problems, and aims to provide a small-sized lubricant discharging device that can control the amount of lubricant discharged and operates with low electric power.

[Means for Solving the Problems] A lubricant discharging device according to this invention includes: a lubricant storage portion having an opening through which lubricant is discharged; a nut portion formed on a partition wall facing the opening; A piston having a container consisting of the housing part and a member housing part formed to extend through a nut part, and pressing the lubricant toward the opening by a piston shaft screwed onto the nut part. ,
A nut and a gear are attached to a portion of the piston shaft that protrudes toward the member storage section and transmit rotational force to the piston shaft, and one end is fixed to the nut and the other end is attached to the member storage section. an elastic member fixed to the inner wall and applying a biasing force to the nut in a direction to advance the piston shaft toward the opening; a power supply section; a switch section for turning on/off the power supply from the power supply section; When the switch is on, the gear is rotated at a predetermined feed speed to advance the piston shaft toward the opening, and when the switch is off, the piston shaft is locked to the gear, thereby making the piston shaft unrotatable. and a control member.

[Function] In the lubricant discharging device of this invention, the biasing force of the elastic member is a biasing force in the direction of advancing the piston shaft toward the opening, and is constantly applied to the nut. Then, by turning on the switch, the control member is actuated to rotate the gear at a predetermined feed speed. In this case, the above-mentioned energizing force acts on the piston shaft, and the electric power required to drive the gear may be small. This causes the piston shaft to rotate and move toward the opening.
The piston pushes out the lubricant. When the switch is turned off, the control member and the gear are locked, and the piston shaft cannot rotate.
In this case, the biasing force of the elastic material is absorbed by the mechanical friction between the control member and the gear.

[Example] An example of this invention will be described below with reference to Figures 1 and 2.
This will be explained using figures. In the figure, 1 is a container, which is made of a cylindrical body. This container 1 stores grease 3 as a lubricant inside, and has a piston 7 that presses the grease 3, a bellows 9 that seals the grease 3 and the piston 7, and an opening 2 that projects from the lower surface. have This opening 2 is provided with a screw 2a for attachment to the lubricating port of the bearing. The piston 7 is provided at the lower end of the output screw 6, which is screwed onto a nut portion 1b provided at the top of the container 1. To summarize, the container 1 includes a lubricant storage section 1A having an opening 2 through which the grease 3 is discharged, and a partition wall 1a facing the opening.
This nut portion 1b is formed in the nut portion 1b.
It has a member housing part 1B formed to extend from the housing part 1A via the above-mentioned housing part 1A. The screw 6 is movable downward by rotation in one direction, thereby sending the piston 7 downward.
A shaft 8 projecting upward is provided at the upper end of the screw 6, and this shaft 8 is interlocked with a motor 14 via a gear mechanism 4. The shaft 8 has a keyway 8a, and a nut 10 that is vertically slidable and locked in the rotational direction is provided in the keyway 8a, and this nut 10 is always held by a spring 11 made of an elastic material. A rotational force in a certain direction is applied, urging the screw 6 to move downward. The mainspring 11 has one end fixed to the nut 10 and the other end fixed to the member storage part 1.
It is fixed to the inner wall 1u of B. Nut 10 above
Similarly, a gear 12 constituting the gear mechanism 4 is provided in the keyway 8a of the shaft 8, and the gear 12 has a pinion 1 connected to a motor 14.
3 are interlocking. The motor 14 is ON,
The rotation is controlled by a power supply unit 20 that has a switch 20a that turns off the switch 20a and a battery, and the rotational force, that is, the force with which the piston 7 pushes out the grease 3, is generated by the mainspring 11.
Since it is energized by a battery, a small device that can be powered by batteries is sufficient. In this embodiment, the output screw 6 and shaft 8 constitute a piston shaft, and the pinion 13 and motor 14 constitute a control member.

Therefore, when the switch 20a is turned on, a predetermined driving force is applied to the pinion 13 by the motor 14. The driving force in this case is set in consideration of the auxiliary force of the mainspring 11. Then, the gear 12 rotates at a predetermined feed speed as the pinion 13 rotates, the output screw 6 advances, and the grease 3 is discharged.

Furthermore, when the switch 20a is turned off, the pinion 13 and the gear 12 are in a locked state, so the force applied by the mainspring 11 is absorbed by the mechanical friction force between the pinion 13 and the gear 12, and the output screw 6 is in a rotationally stopped state. becomes.

Therefore, by turning on and off the switch 20a,
Grease discharge amount can be controlled by the control member.

Next, the operation will be explained. The shaft 8 is always energized in a fixed direction, that is, in the direction of arrow F, by the mainspring 11 via the nut 10, and the piston 7
A force is applied that presses downward, but
It is locked by a pinion 13. Now press switch 20a to turn on the motor 1.
4 gives the pinion 13 a predetermined rotation speed. Each revolution of the pinion 13 moves the gear 12 one pitch, and the screw 6 rotates at a speed corresponding to the number of revolutions of the pinion 13. When the screw 6 rotates, the piston 7 moves downward and the grease 3 is discharged from the opening 2. That is, the switch 20a
The lubricant 3 is discharged only when is turned on.

In this embodiment, the rotation of the gear mechanism 4 is controlled by the gear 12, the pinion 13, and the motor 1.
4, however, it may be constructed from a gear 18, an ankle 17, and a bimetal type piezo element 16, as shown in FIG. That is,
The anchor 17 includes an arm 17b pivotally connected at the center by a pin 17a, claw pieces 17c protruding from both ends of the arm 17b in the direction of the gear 18, and a protrusion protruding in the opposite direction of the gear 18 from the position of the pin 17a. It consists of a pin 17d and a balance 17e that gives pendulum vibration to the pallet pallet 17 at the tip of the protrusion 17d. The piezo element 16 has one end fixed to the container 1 and the other end engaged with the claw 18a of the gear 18 to lock the rotation of the gear 18,
It is controlled by the power supply section 20.

In the above configuration, when the switch 20a is turned on and the voltage of the piezo element 16 is applied, the shaft 8
It warps in the direction away from the gear 18 and comes off the claw 18a of the gear 18. Gear 18 starts rotating, but ankle 1
7 performs a pendulum movement around the pin 17a by the rotational force of the gear 18 and the balance 17e, and the claw pieces 17c alternately engage the claws 18a of the gear 18, and the gear 18
is sent one pitch at a time by the ankle 17. In other words, a voltage is applied to the piezo element 16, and the gear 1
While it is out of 8, the gear 1 is set by the pallet 17.
8 performs intermittent motion and rotates the shaft 8 one pitch at a time. That is, in the case of this embodiment, the piezo element 16 and the pallet 17 constitute a control member.

In this case, when the switch 20a is turned on, the piezo element 16 is warped and the gear 18 rotates, but the rotation of the gear 18 is controlled by the pallet 17 to a predetermined feed rate (one pitch feed), thereby controlling the grease discharge. In this case, the power supply section 20 requires only enough power to disengage the piezo element 16 from the gear pawl 18a, and a small one can be used.

Further, when the switch 20a is turned off, the piezo element 16 returns to its original state and the gear pawl 18a
Since it is in the locked state, the biasing force of the mainspring 11 is absorbed by the mechanical friction force between the piezo element 16 and the gear pawl 18a, and the output screw 6 comes to a stopped rotation state.

In this way, also in this embodiment, the switch 20a
By turning on and off, the grease discharge amount can be controlled by the control member.

[Effects of the invention] As described above, the lubricant discharging device of this invention has the following advantages:
A lubricant accommodating part having an opening through which lubricant is discharged, a nut part formed on a partition wall facing the opening part, and a member accommodating part formed to extend from the accommodating part through the nut part. a piston that presses the lubricant in the direction of the opening by a piston shaft screwed onto the nut portion; a nut and a gear for transmitting rotational force to the piston shaft; one end fixed to the nut and the other end fixed to the inner wall of the member housing;
an elastic member that applies a biasing force to the nut in the direction of moving the piston shaft toward the opening; a power source section; a switch section that turns on/off the power supply from the power source section; A control member that rotates the gear at a predetermined feed speed to advance the piston shaft toward the opening, and locks the piston shaft to the gear when the switch is off, thereby making the piston shaft unrotatable. Therefore, it is possible to control the amount of lubricant discharged, and to obtain a device that can be miniaturized with low electric power.

[Brief explanation of the drawing]

1 and 2 are a side sectional view and a plan sectional view of a lubricant discharging device which is one embodiment of this invention, and FIG. 3 is a plan sectional view of another embodiment. 1... Container, 2... Opening, 3... Grease, 4
... Gear mechanism, 7 ... Piston, 8 ... Shaft, 11 ... Mainspring, 12 ... Gear, 13 ...
Pinion, 14...motor, 20...power supply section.

Claims (1)

[Scope of utility model registration request] A lubricant accommodating part having an opening through which lubricant is discharged, a nut part formed on a partition wall facing the opening part, and a member accommodating part formed to extend from the accommodating part through the nut part. a piston that presses the lubricant in the direction of the opening by a piston shaft screwed onto the nut portion; a nut and a gear for transmitting rotational force to the piston shaft; one end fixed to the nut and the other end fixed to the inner wall of the member housing;
an elastic member that applies a biasing force to the nut in the direction of moving the piston shaft toward the opening; a power source section; a switch section that turns on/off the power supply from the power source section; A control member that rotates the gear at a predetermined feed speed to advance the piston shaft toward the opening, and locks the piston shaft to the gear when the switch is off, thereby making the piston shaft unrotatable. A lubricant discharging device characterized by: