JP4049873B2 - Timing type automatic lubricator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a timing type automatic oil supply apparatus that supplies oil to oil supply parts that exist discretely, such as chain connection parts.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a timing type automatic refueling device that supplies oil to discrete oil supply portions such as a connecting portion in a moving chain can face each oil supply portion as described in, for example, Japanese Patent No. 1361994. When a plurality of oil discharge nozzles and oil supply sources such as pumps are connected via solenoid valves and distribution valves and the oil supply timing at which each oil discharge nozzle faces each oil supply part is detected by a detection device, The valve is operated to communicate between the oil supply source and each oil discharge nozzle, and the oil supply is intermittently supplied only to the oil supply portion at the position corresponding to each oil discharge nozzle. When the chain is lubricated by such an automatic lubrication device, it is possible to automatically lubricate the moving chain, and also to lubricate unnecessary parts other than the lubrication part such as the connecting part. The chain life can be extended while suppressing the amount of oil used and suppressing excessive oil supply.
[0003]
[Problems to be solved by the invention]
However, since the conventional timing type automatic oil supply apparatus connects the solenoid valve for controlling the flow path and each oil discharge nozzle through a common distribution valve, the oil supply nozzles simultaneously supply oil to a plurality of oil supply units. If it tries to do this, this distribution valve will become large, and the flow resistance to each oil discharge nozzle will differ by this enlarged distribution valve, respectively, and variation will occur in the oil discharge operation of each oil discharge nozzle. . If this variation cannot be adjusted, a certain oil discharge nozzle supplies oil to a position shifted from the oil supply portion, and the life of the entire chain cannot be effectively increased.
[0004]
An object of the present invention is to provide a timing type automatic oil supply apparatus that can supply oil to an oil supply unit while suppressing variation in oil discharge operation in each oil discharge nozzle.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention connects a plurality of oil discharge nozzles to a flow path connected to an oil supply source via a solenoid valve, and drives the solenoid valve at a predetermined time by a timing detection device to discharge the oil. In a timing type automatic oiling device that supplies oil from a nozzle to a corresponding oil supply unit, an accumulator is connected to the oil supply side of the solenoid valve, and the oil discharge nozzle is connected to the flow path via a distribution valve, respectively. Each of the distribution valves has an oil supply port connected to the flow path side and a discharge port connected to the oil discharge nozzle, and is arranged between the oil supply port and the discharge port. In addition, there is a gap that communicates between the oil supply port and the discharge port and forms a constant oil amount chamber, and when pressure oil acts from the oil supply port, the gap is closed and the piston is discharged. A movable valve so as to move the mouth side, the movable valve and a spring for biasing said said filler opening side, each dispensing valve, said when driving the electromagnetic valve by said timing detection device The piston is driven by the pressure oil accumulated in the accumulator, and the oil amount in the constant oil amount chamber is discharged from the oil discharge nozzle to the oil supply portion by the movement of the piston. To do.
[0006]
The timing type automatic oil supply apparatus according to the present invention is provided with a plurality of oil discharge nozzles, each via a distribution valve, in a flow path that communicates with an accumulator accumulated by an oil supply source via an electromagnetic valve as described above, and drives the electromagnetic valve. The accumulated oil from the accumulator is applied to the piston of the distribution valve, and the oil sent out by the operation of this piston is discharged from each oil discharge nozzle to the oil supply part. Since there is no difference in flow path resistance to the discharge nozzles, variations in the oil supply timing from the oil discharge nozzles can be prevented, and automatic oil supply with excellent responsiveness can be performed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a hydraulic circuit diagram of a timing type automatic fueling device according to an embodiment of the present invention.
The moving body 1 such as a chain has connecting portions 2 by pins at predetermined intervals, and this connecting portion 2 forms an oil supply portion that receives oil at predetermined intervals in order to improve the life thereof. A plurality of oil discharge nozzles 3 are arranged in a positional relationship corresponding to a plurality of these connecting portions 2. Here, five oil discharge nozzles 3 are arranged. An electromagnetic valve 4 is connected to an oil supply source 5 such as a pump via a check valve 6 and an accumulator 7, and details are respectively shown in the flow paths 8 connected to the oil supply source 5 via the electromagnetic valve 4. The oil discharge nozzle 3 is connected via a distribution valve 9 described later. The electromagnetic valve 4 is a two-position switching type, and in the standby state shown in the figure, the communication between the flow path 8 and the oil supply source 5 is cut off and the flow path 8 is connected to the oil tank 10, but when an operation command is given Driven to the right against the position holding spring 11, the flow path 6 and the oil supply source 5 communicate with each other. An operation command to the electromagnetic valve 4 is given by a timing detection device 12 that detects the connecting portion 2, and this timing detection device 12 is connected by a sensor 13 constituted by a non-contact type photoelectric switch and the like. When the part 2a is detected, the solenoid valve 4 is driven to supply oil to the corresponding connecting part 2 from each oil discharge nozzle 3, and then the fifth connecting part is detected after the connecting part 2a is detected by the sensor 13. And a counter 14 that controls the solenoid valve 4 to be driven again to discharge oil from each oil discharge nozzle 3 and to supply oil to each connecting portion 2 when it corresponds.
[0008]
Next, the configuration of the distribution valve 9 described above will be described with reference to FIG. 2 which is a sectional view showing the standby state.
The valve body 9a of the distribution valve 9 is formed with an oil supply port 15 leading to the flow path 8 and a discharge port 16 reaching the oil discharge nozzle 3 and is movable in the flow path between the oil supply port 15 and the discharge port 16. A piston 17 having a valve 17 and a gap 19 that is controlled to open and close the flow path between the oil supply port 15 and the discharge port 16 by the operation of the movable valve 17 is provided. In other words, the piston 20 has a storage portion 20a for movably storing the movable valve 17, and a gap 19 that is a through hole is formed in the piston 20 in a portion located in the storage portion 20a. The gap 19 is closed by the movable valve 17 when the movable valve 17 moves upward in response to the pressure received from the movable valve 17.
[0009]
A sealing body 21 having a discharge port 16 is screwed to the upper end portion of the valve body 9a, and a piston 20 is arranged to face the sealing body 21 so as to be movable in the valve body 9a. The upper limit position of the piston 20 is regulated by the stopper 22a of the sealing body 21, and the lower limit position of the piston 20 is regulated by the stopper 22b of the valve body 9a. A spring 23 that constantly urges the piston 20 downward is disposed between the sealing body 21 and the piston 20, and an oil chamber 24 is formed. The operating distance S of the piston 20 in the oil chamber 24 is A constant oil amount chamber 25 is formed at the corresponding portion.
[0010]
This constant oil amount chamber 25 is formed at a portion corresponding to the operating distance S when the piston 20 is in contact with the stopper 22b by the spring 23 in the standby state of FIG. When the piston 20 moves upward due to the pressure received from the nozzle and abuts against the stopper 22a, the oil is discharged from the discharge port 16 while reducing its volume to zero, and each oil discharge nozzle 3 connected to the same part discharges the oil. The connecting portion 2 is refueled.
[0011]
Next, the operation of the above-described timing type automatic fueling device will be described.
When the oil supply source 5 operates in the state of FIG. 1, a certain amount of oil with a constant pressure is stored in the accumulator 7 via the check valve 6. At this time, since the electromagnetic valve 4 is held in the state shown in the figure by the position holding spring 11, the oil supply port 15 and the flow path 8 of the distribution valve 9 are communicated with the oil tank 10, and the distribution valve 9 is connected to the spring 23. The state of FIG. 2 is maintained by the function. Thereafter, the sensor 13 detects the connecting portion 2 a of the chain 1, and an operation command is given to the electromagnetic valve 4 at a timing at which each connecting portion 2 of the chain 1 has a positional relationship corresponding to each oil discharge nozzle 3. When the electromagnetic valve 4 is driven rightward against the position holding spring 11, the accumulator 7 and the flow path 8 are communicated with each other, so that the accumulated oil in the accumulator 7 is distributed to the flow path 8 and the distribution via the electromagnetic valve 4. Supplied to the valve 9. At this time, the check valve 6 prevents back flow toward the oil supply source 5 side.
[0012]
In the distribution valve 9 shown in FIG. 2, after pressure oil is supplied to the oil supply port 15, the movable valve 17 is driven upward along the storage portion 20 a, and the gap 19 of the piston 20 is blocked by the upper portion of the movable valve 17. 3 moves upward together with the piston 20 as shown in FIG. At this time, the piston 20 moves upward until it collides with the stopper 22a against the spring 23, and along with this movement, the oil reservoir chamber 18 is formed while increasing its volume, and the oil supply port 15 is formed therein. Pressure oil flows from the side. Since the volume of the constant oil amount chamber 25 in the oil chamber 24 is reduced corresponding to the increase in the volume of the oil reservoir chamber 18, the oil in the constant oil amount chamber 25 is sent out from the discharge port 16 and shown in FIG. Oil is supplied from the oil discharge nozzle 3 to the corresponding connecting portions 2.
[0013]
When the piston 20 pushes out a predetermined amount of oil in the constant oil amount chamber 25, as shown in FIG. 3, the piston 20 collides with the stopper 22a, the upper limit is restricted, and the volume of the constant oil amount chamber 16 becomes zero. At this time, the counter 12 shown in FIG. 1 reaches a predetermined time period and gives a return command to the solenoid valve 4. Accordingly, the solenoid valve 4 is in the initial state shown in FIG. 1, and the flow path 6 and the distribution valve 7 side communicated with the oil tank 10 again are depressurized. As shown in FIG. 4, the distribution valve 9 is depressurized on the oil supply port 15 side, so that the piston 20 and the movable valve 17 are moved downward by the spring 23. At this time, the oil reservoir chamber 18 whose volume has been increased on the lower side of the piston 20 is reduced in volume as the piston 20 is lowered, so that the oil inside the oil reservoir 18 moves and drives the movable valve 17 downward. The distribution valve 9 that opens the gap 19 of the piston 20 and flows into the oil chamber 24 and the constant oil amount chamber 25 from the opened gap 19, and thus stores a predetermined amount of oil in the constant oil amount chamber 25. The standby state shown in FIG. When it is detected that the sensor 13 of the timing detection device 12 corresponds to the fifth connecting portion 2 in the illustrated example from the connecting portion 2a with the subsequent movement of the chain 1, or the time period corresponding to this is counted. When 14 is counted, the solenoid valve 4 is again driven to the right in the drawing to supply oil from the oil discharge nozzles 3 to the connecting portions 2.
[0014]
Since the distribution valve 9 is provided for each oil discharge nozzle 3 in this way, there is no difference in the flow path resistance to each oil discharge nozzle 3 by integrating the distribution valves as in the prior art. The oil can be supplied to a plurality of connecting portions at the same time. In addition, the pressure oil from the accumulator 7 is applied to the distribution valve 9 along with the operation of the solenoid valve 4, and a predetermined amount of oil in the constant oil amount chamber 25 is directly sent out by the piston 20 driven by the pressure oil to discharge the oil. Since the discharge is made from the nozzle 3, it is possible to obtain a distribution valve 9 with good responsiveness. Furthermore, since the distribution valve 9 is provided for each oil discharge nozzle 3, even if variations occur between the oil discharge nozzles 3, it can be easily adjusted as described below.
[0015]
For example, when an operation delay occurs in the distribution valve 9 shown in FIG. 2, the spring force of the spring 23 may be adjusted. This is because the piston 20 and the sealing body 21 are arranged to face each other, and the spring 23 is arranged between them, so that the sealing body 21 is rotated in either direction to reduce the threading dimension relationship with the valve body 9a. By doing so, the spring force of the spring 23 can be weakened easily. The responsiveness of the piston 20 is against the pressure receiving pressure that acts as a driving force upward on the piston 20 by the pressure oil supplied to the oil reservoir chamber 18 formed on the oil supply port 15 side of the piston 20. Therefore, the operation force responsiveness of the piston 20 can be improved by adjusting the spring force of the spring 23. In addition, when adjusting the amount of oil supplied from the oil discharge nozzle 3 of the distribution valve 9 shown in FIG. 2, the stopper 22 a that regulates the upper limit position of the piston 20 that determines the volume of the constant oil amount chamber 25 and the piston 20. What is necessary is just to change an opposing distance. This may be achieved by changing the threading dimension of the sealing body 21 having the stopper 22a to the valve body 9a. However, since the spring force of the spring 23 described above also changes at this time, a discharge amount adjusting member disposed so as to be position-adjustable with respect to the moving direction of the piston 20 is provided, and the opposing distance between the stopper 22a and the piston 20 is determined. It is desirable that the spring force of the spring 23 can be adjusted separately.
[0016]
In the above-described embodiment, the case where the five oil discharge nozzles 3 are provided has been described, but the number is not limited thereto.
[0017]
【The invention's effect】
As described above, the timing type automatic oil supply apparatus according to the present invention is provided with a plurality of oil discharge nozzles via distribution valves in a flow path communicating with an accumulator accumulated by an oil supply source via an electromagnetic valve, and drives the electromagnetic valve. Then, the accumulated oil from the accumulator is applied to the piston of the distribution valve, and the oil sent out by the operation of this piston is discharged from each oil discharge nozzle to the oil supply part. Since there is no difference in flow path resistance to the oil discharge nozzle, variations in the oil supply timing from each oil discharge nozzle can be prevented, and automatic oil supply with excellent responsiveness can be performed.
[Brief description of the drawings]
FIG. 1 is a hydraulic circuit diagram of a timing type automatic fueling device according to an embodiment of the present invention.
2 is a cross-sectional view showing a standby state of a distribution valve that is a main part of the timing type automatic fueling device shown in FIG. 1;
3 is a cross-sectional view showing a discharge state of the distribution valve shown in FIG. 2. FIG.
4 is a cross-sectional view showing a return state of the distribution valve shown in FIG. 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chain 2 Connection part 3 Oil discharge nozzle 4 Solenoid valve 5 Oil supply source 7 Accumulator 8 Flow path 9 Distribution valve 12 Timing detection device 15 Oil supply port 16 Discharge port 17 Movable valve 19 Gap 20 Piston 21 Sealing body 23 Spring 24 Oil chamber 25 Constant oil volume chamber

Claims (3)

A plurality of oil discharge nozzles are connected to a flow path connected to an oil supply source via an electromagnetic valve, and the electromagnetic valve is driven at a predetermined time by a timing detection device to supply oil from the oil discharge nozzle to a corresponding oil supply unit. in timed automatic lubrication apparatus that the above-mentioned connecting an accumulator to the oil supply source side of the solenoid valve, connected respectively to the oil discharge nozzle via a respective distribution valves in the flow path, each distributing valve, the The valve body has an oil supply port connected to the flow path side and a discharge port connected to the oil discharge nozzle. The valve body is disposed between the oil supply port and the discharge port and communicates between the oil supply port and the discharge port. A piston that forms a constant oil amount chamber and a movable valve that closes the gap and moves the piston toward the discharge port when pressure oil acts from the oil supply port The movable valve and a spring for biasing said said filler opening side, each distributing valve, drives the piston in the accumulator has been pressurized oil within the accumulator when driving the electromagnetic valve by said timing detection device A timing-type automatic oiling apparatus , wherein the oil quantity in the constant oil quantity chamber is discharged from the oil discharge nozzle to the oil supply part by the movement of the piston. The sealing body according to claim 1, wherein a sealing body having a stopper for restricting movement of the piston to the discharge port side is screwed to the valve body at a position corresponding to the discharge port side of the piston so that the position can be adjusted. timed automatic lubrication apparatus characterized by combined. 2. The electromagnetic valve according to claim 1, wherein the electromagnetic valve is configured to depressurize the flow path in a steady state and to communicate between the flow path and the accumulator by driving by the timing detection device. Timing type automatic oiling device.

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