JPS59555Y2 - Lubricating oil supply device - Google Patents

Description

[Detailed description of the invention] This invention is a reciprocating type automatic device equipped with a pressure relief valve device (also called a pressure relief valve) that mechanically opens a mechanical valve using a cam or the like to relieve pressure in the circuit. Using an intermittent oil supply pump, the pressure oil from this pump is sent through the valve body to a quantitative distribution valve, and the piston of the valve is operated to discharge a fixed amount of oil to the sliding parts of the machine. In the above-mentioned pressure relief valve device, in other words, the piston of the distribution valve is lowered and returned by a spring due to the drop in the pressure in the circuit due to the opening operation of the mechanical valve by the cam, and the distribution valve in this returned state is used for discharging the next oil. This invention relates to a so-called lubricating oil supply device that sends oil from a pump.

By the way, the use of a reciprocating automatic intermittent lubrication pump equipped with a pressure relief valve device using a cam as described above is because the pump is much cheaper than a gear pump or the like normally used in this type of equipment. The purpose of this is to reduce manufacturing costs, but the problem is that the above-mentioned depressurization is performed by a cam, and this cam is rotated in conjunction with the operation of the machine, so it is necessary to stop the machine at the end of the day's work. Then, when you start the machine first thing the next morning, if the operating state of the pump when the machine stopped was just after it had finished discharging oil, it would not work immediately after the pump cycle time has elapsed. A problem arises in that the distribution valve cannot be operated.

Therefore, in the present invention, a manual lubrication pump is used in conjunction with the automatic intermittent lubrication pump, so that no matter what operating state the automatic lubrication pump is in, it is possible to immediately lubricate the machine by operating the manual lubrication pump. It is in.

First, details of the embodiment will be described with reference to the drawings.

H is a valve body, in which ports C and D are formed, and one port C is connected to an automatic intermittent lubrication pump A.

This pump A consists of a so-called reciprocating pump of cylinder/piston type that performs suction and discharge, and this pump A mechanically operates a mechanical valve using a cam that is rotated by the drive motor of the pump via a reduction gear. It is equipped with a pressure relief valve device that opens to lower the pressure in the circuit.

Further, the drive motor of the pump is designed to operate in synchronization with the oil supply light machine.

A manual oil supply pump B is connected to the other port D, and this pump B, for example, sucks oil by pulling the bundle, sends this oil to port D, and circuits it by returning the bundle. It is also equipped with a pressure relief valve device that lowers the internal pressure.

A circulation chamber I is communicated with the port 1-C, and this circulation chamber I is communicated with the valve seat surface on one end side of the valve chamber C, which has valve seat surfaces at both ends, through the upper passage port in the figure. There is.

Also, D is the valve seat 1 on the other end side of the valve chamber C.
- communicates with surface 4.

A switching valve rod 2 for opening and closing valve seat surfaces 1.degree. 4 at both ends thereof is inserted into the valve chamber C so as to be reciprocally movable.

The above-mentioned circulation chambers A and E communicate with a communication passage 2, and a depressurizing valve is normally biased to close the valve seat 7 by a spring 6 so as to block communication between the communication passage 2 and the circulation chambers A and E. 5 is inserted, and this valve 5 works together with the check valve 8 to measure the depressurizing effect.

Further, a quantitative distribution valve 3 is connected to the port E.

Therefore, the operation is such that the oil that is intermittently pumped from the automatic oil supply pump A reaches the port C1 distribution chamber A, the valve seat part 1, and is distributed quantitatively through the discharge port E by pushing the switching valve rod 2 to the left in the figure. Sent to valve 3.

The pressure (3 kg/cm3) flowing into this distribution valve pushes up the piston that makes up the valve, and the oil is discharged to the sliding parts of the machine. When this discharge is finished, a cam equipped in automatic oil supply pump A pushes the piston at the appropriate time to relieve the pressure in the circuit of pump A, and as a result of this relief, the piston of the distribution valve 3 returns to the lower position by spring force, measures the oil, and waits to be able to increase with the next pump pressure. .

Therefore, manual lubrication pump B related to the main structure of the present invention
Explain what happens when you operate .

The oil that is pumped by operating the manual oil supply pump B enters the circulation chamber E and works to move the switching valve rod 2 to the right in the figure, and the pressure that enters the two wheels A and E causes Move the pressure relief valve 5 to the right.

At this time, when the automatic oil supply pump A is in operation, the oil discharged from the pump is under pressure, and the cam, which is still being driven via the reduction gear, is not operating the mechanical valve. The hydraulic pressure entering chambers 2 and 2 moves the depressurizing valve 5 against the spring 6, opening the valve seat 7 and check valve 8 (pressure 0.5 kg/cmQ), and opening the port 1-C side. Release the pressure in the chamber.

Therefore, the switching valve rod 2 is completely brought into close contact with the valve seat surface 1 and sealed.

If the pressure in the flow chamber A continues to be generated, the switching valve rod 2 will not come into close contact with the valve seat surface 1 and cannot be sealed.

Therefore, it can be seen that by sealing the valve seat surface 1, oil from the manual oil supply pump B is supplied to the distribution valve 3 through the distribution chamber E, the valve seat surface 4, and the boat E.

Also, if the above pump A is in operation, the cam driven via the reduction gear operates the mechanical valve in conjunction with this operation, and the pressure in the circuit on the port C side is relieved. Even at this time, the depressurization valve 5 moves to the right due to the operation of the manual oil supply pump B, and the circuit on the port C side becomes a circuit that depressurizes the circuit.

Note that the function of the pressure relief valve 5 in this case has no functional significance.

As described above, according to the present invention, no matter what operating state the automatic lubrication pump A is in, as long as the manual lubrication pump is operated, the switching valve rod 2 can be completely moved and the machine can be refueled at will. This makes it possible to use a reciprocating pump having a depressurizing function using the inexpensive cam mentioned at the beginning, thereby making it possible to reduce the cost of the lubricating oil supply device.

In addition, the manual lubrication pump has a circuit configuration that depressurizes when it is not in operation, so no matter when the automatic lubrication pump operates, the switching valve rod 2 will move to the left, allowing for problem-free lubrication. Of course, this has happened.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view, Fig. 2 is a sectional view taken along line I-I,
FIG. 3 is a sectional view taken along line II-II.

Claims (1)

[Scope of utility model registration request] Ports C and D are provided on the valve body H, and one port C
an automatic intermittent lubrication pump A equipped with a pressure relief valve device, and
A manual oil pump B, which is also equipped with a pressure relief valve device, is connected to the other port)D, and a discharge port)E is provided for the circulation chambers A and E, which are connected to port)C and port)D. Both ends of the valve chamber C connected to the quantitative distribution valve 3 are communicated with the valve seat surfaces 1 and 4, respectively, and a switching valve rod 2 for opening and closing the valve seat surface is inserted into the valve chamber C in a reciprocating manner. The communication passages A and E are connected through a communication passage 2, and the communication passage 2 is normally closed and biased to cut off communication between the circulation chambers A and E, and there is a pressure accumulation in a circuit system connected to the circulation chamber A. The lubricating oil supply device is characterized in that it is provided with a pressure relief valve 5 that opens so as to relieve pressure from the circulation chamber A when pressure is accumulated in the circulation chamber E.