JPH0769037B2 - Centralized lubricator distribution valve - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution valve of a centralized lubrication device that measures lubricating oil and distributes and supplies a fixed amount of lubricating oil to lubrication points such as machine tools.

(Prior Art) Conventionally, a distribution valve of this kind of centralized lubricating device is described in, for example, US Pat. No. 3,145,803, and as shown in FIG. 6, an oil supply passage (A) and an oil discharge passage (B). A cylinder hole (D) communicating with the oil supply passage (A) and the oil discharge passage (B) is formed in the valve body (C) having
A metering piston (E) is reciprocally provided in the cylinder, and the cylinder hole (D) is defined by the piston (E) into a metering chamber (a) and a back chamber (b). ), The valve body (F) is disposed on the oil supply passage (A) side, and a spring (G) is provided between the valve body (F) and the piston (E).
On the other hand, a communication passage (H) for lubricating oil extending from the oil supply passage (A) to the back chamber (b) is formed inside the valve body (C).

Then, the oil supply passage (A) of each distribution valve configured as described above
By connecting a main pipe communicating with a pump and supplying lubricating oil to the oil supply passage (A) by driving the pump,
The valve body (F) of the distribution valve is moved forward so that the lubricating oil supplied to the oil supply passage (A) is transferred from the communication passage (H) to the rear chamber (b) of the cylinder hole (D). When the lubricant is supplied, the piston (E) is moved forward in accordance with the supply of the lubricant, and a predetermined amount of lubricant measured in the measuring chamber (a) is supplied from the oil discharge passage (B) to a machine tool or the like. This is to lubricate lubricated areas. Then, after the refueling of each distribution valve is completed, the driving of the pump is stopped, and the refueling passage (A)
The main pipe to which is connected is depressurized, and by this depressurization, the valve body (F) is moved back to cut off the communication between the oil supply passage (A) and the communication passage (H), and at the same time. The piston (E) is returned by the spring (G), and the lubricating oil supplied to the back chamber (b) side is transferred to the communication passage (H).
The oil is introduced into the measuring chamber (a) through the passage (f) provided in the valve body (F), and the lubricating oil is measured in the measuring chamber (a) to prepare for the next oil supply. .

(Problems to be solved by the invention) However, in the distribution valve configured as described above, the communication passage (H) for communicating the oil supply passage (A) and the rear chamber (b) of the piston (E) is A vertical passage is formed on the side of the cylinder hole (D) in the valve body (C), and a horizontal passage that connects the vertical passage to the oil supply passage (A) and the back chamber (b) is formed. Therefore, the machining of the passage becomes very complicated, and the vertical passage and the lateral passage forming the communication passage (H) need to penetrate the outer surface of the valve body (c). After the passage is processed, it is necessary to attach a plug that closes each of the through portions, and the valve body (c) has the valve body (F) and the piston (E).
When assembling the spring (G), the assemblability is poor,
There was a problem that automatic assembly became complicated, and the cost was high as a whole.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a distribution valve for a centralized lubrication device, which can simplify passage processing, facilitate automatic assembly, and can reduce the cost as a whole. To provide.

(Means for Solving the Problems) The present invention is directed to a valve body (1) having a cylinder hole (2), a metering piston (3) movably mounted in the cylinder hole (2), and a valve body (6). ) And a spring (7),
During refueling, the refueling passage (5) is communicated with the rear chamber (22) of the measuring piston (3), the measuring piston (3) is moved forward, and the lubricating oil in the measuring chamber (21) is drained. Distributing oil discharged from (5), and when depressurizing, the lubricating oil in the rear chamber (22) is supplied to the measuring chamber (21) by the return movement of the measuring piston (3) by the spring (7). In the valve, one end side in the length direction of the cylinder hole (2) is opened and the other end side is made blind, and an opening groove (in the length direction of the cylinder hole (2) is formed in the valve body (1) ( 1a) is provided, and the sleeve (8) is inserted into the cylinder hole (2) to form an oil passage (9) communicating with the back chamber (22). A passage block (on the oil supply passage side) having a communication hole (10) communicating with the oil passage (9) and an insertion hole (11) for the valve body (6) ( The sleeve (8) is fitted with a lid body (13) that fits the valve body (1) into the valve body (1).
And the passage block (12) is fixed to the valve body (1), while the valve body (6) and the communication hole (10) are selected as one of the oil supply passage (4) and the measuring chamber (21). It is characterized in that passages (61) (62) are provided for communicating with each other.

When the oil supply passage (4) side of the cylinder hole (2) and the sleeve (8) inserted into the cylinder hole (2) is tapered so as to have a smaller diameter toward the oil supply passage (4). ,
This is preferable because the sealing property between the oil discharge passage (5) and the oil passage (9) is improved.

Further, the sleeve (8) has an oil drain hole (81) corresponding to the oil drain passage (5) of the valve body (1) and the open groove (1a).
It is preferable to provide a positioning projection (82) for the oil drain hole (81) that engages with the.

Further, the passage block (12) includes a passage member (12A) having the communication hole (10) and an end member (12B) facing the measuring chamber (21), and the end member (12B).
It is preferable to arrange packings (14) and (15) on the side of the insertion hole (11) of the valve body (6) and on the side of the oil supply passage (4) of the passage member (12A).

(Operation) In the above configuration, by inserting the sleeve (8) into the cylinder hole (2), the sleeve (8) is inserted.
The oil passage (9) can be formed by and the open groove (1a), and the open groove (1a) is only formed along the cylinder hole (2). ) Can be easily formed without the need for passage machining as in the conventional example, and the cylinder block (2) of the valve body (1) has the passage block (10) having a communication hole (10). 12) is inserted and the oil passage (9) can be communicated with the oil supply passage (4) through the communication hole (10). In other words, the passage block (12) is communicated with the oil passage. Since it is sufficient to form (10) and there is no need to form a lateral passage in the valve body (1) as in the conventional example, the passage can be easily processed.

Moreover, the passage block (12), the sleeve (8), the valve body (6), the spring (7) and the metering piston (3) can be assembled from the open side of the cylinder hole (2). The passage block (12) is inserted from the opening side of the cylinder hole (2) formed in the valve body (1), and the valve body (6) is inserted into the insertion hole (11) of the block (12). The sleeve (8) is inserted into the cylinder hole (2) and then the lid (13) is attached to the open side of the cylinder hole (2) to fit the sleeve (8). Since 8) and the passage block (12) can be fixed in the cylinder hole (2), the assembling work of the respective parts can be simplified and the automatic assembling can also be easily carried out.

When the oil supply passage (4) side of the cylinder hole (2) and the sleeve (8) into which the cylinder hole (2) is inserted is tapered so that the diameter becomes smaller toward the oil supply passage (4). The sealing property between the oil discharge passage (5) and the oil passage (9) is improved, and the leakage of lubricating oil from the oil passage (9) to the oil discharge passage (5) side can be prevented.

Further, in the sleeve (8), an oil drain hole (81) corresponding to the oil drain passage (5) of the valve body (1), and the open groove (1a).
When the oil discharge hole (81) is provided with a positioning protrusion (82) for engaging with the oil discharge hole (81), the oil discharge hole (81) of the sleeve (8) and the oil discharge passage (5) are reliably positioned. Can be
It becomes possible to perform automatic assembly more easily.

Furthermore, by configuring the passage block (12) with a passage member (12A) having the communication hole (10) and an end member (12B) facing the measurement chamber (21), the end member ( The packings (14) and (15), particularly the insertion hole (11), which are arranged on the insertion hole (11) side of the valve body (6) and the oil supply passage (4a) side of the passage member (12A) on the 12B) side. When the packing (14) disposed on the side is assembled in the insertion hole (11) in advance, the troublesome work is eliminated, and when the members (12A) (12B) are mounted in the cylinder hole (2), The packings (14) and (15) can be sequentially assembled, and automatic assembly can be further facilitated.

(Embodiment) FIG. 1 shows a structure in which four distribution valves are provided in one valve body (1). Inside the valve body (1), four cylinder holes extending in the vertical direction ( 2) is formed, and each of these cylinder holes (2) has a measuring piston (3).
Inside of each of the cylinder holes (2) by the pistons (3) so as to reciprocate.
2) and the inside of the valve body (1),
Communicating with each of the cylinder holes (2) through a branch passage (4a),
One oil supply passage (4) for supplying lubricating oil to each cylinder hole (2) and a plurality of oil discharge passages (5) for discharging lubricating oil from each cylinder hole (2) are formed. Further, a valve element (6) is disposed on the oil supply passage (4) side of each of the cylinder holes (2), and between each valve element (6) and each of the pistons (3). , And each has a spring (7) interposed.

Therefore, the cylinder holes (2) provided in the valve body (1) configured as described above are formed such that the upper side in the length direction is opened and the lower side is formed in a blind shape, and the valve body (1) is formed.
An opening groove (1a) which is opened to the cylinder hole (2) side and extends vertically along the cylinder hole (2),
Also, a sleeve (8) is fitted into the cylinder hole (2), and an oil passage (9) communicating with the back chamber (22) side is provided between the sleeve (8) and the open groove (1a). Also, a communication hole (10) communicating with the oil passage (9) and an insertion hole for allowing the valve element (3) to freely move vertically are inserted in the lower portion of the cylinder hole (2). A passage block (12) having a hole (11) is inserted and arranged, and the valve body (6) is provided with a communication hole (11) of the passage block (12) and the oil supply passage (4). The first and second passages (61) and (62) are formed to selectively communicate with either side of the cylinder hole (2) and the measuring chamber (21). Further, the lid body (13) is fixed to the valve body (1) at the upper opening side of the cylinder hole (2) with a fixing bolt (13a), and the sleeve (8) and the passage are connected by the lid body (13). The block (12) is fixedly assembled in the valve body (1).

Then, when assembling the distribution valve configured as described above,
From the upper opening side of the cylinder hole (2) in the valve body (1), first, the passage block (12) is inserted and fitted,
The leg portion of the valve body (3) is inserted into the insertion hole (12) of the block (12), and then the sleeve (8) is inserted into the cylinder hole (2) to set the spring (7). Then, after inserting the measuring piston (3) and fixing the lid (13) to the upper opening side of the cylinder hole (2) with a fixing bolt (13a), the sleeve (8) and the passage block ( Since 12) and 12) are easily fixedly assembled in the cylinder hole (2), automatic assembly can be easily performed. In addition, inside the valve body (1),
The open groove (1a) extending along the cylinder hole (2)
Forming the sleeve (8) in the cylinder hole (2).
Is inserted into the rear chamber (20) of the cylinder hole (2) between the sleeve (8) and the open groove (1a).
Since the oil passage (9) communicating with the side is formed,
The oil passage (9) can be easily formed without requiring complicated passage processing.

The oil supply passage (4) is mainly connected to a main pipe (not shown) communicating with the electric pump, and the lubricating oil is supplied to the oil supply passage (4) side by driving the electric pump. Then, the valve body (6) moves forward to the inner upper side of the cylinder hole (2) (see the right end distribution valve in FIG. 1), and the lubricating oil in the oil supply passage (4) is transferred to the valve body. The first passage (61) provided in (6) and the communication hole (1 provided in the passage block (12)
0) to the rear chamber (22) of the cylinder hole (2) from the oil passage (9) formed by the sleeve (8) and the open groove (1a), and the lubricating oil The metering piston (3) causes the spring (7)
A predetermined amount of lubricant measured in the measuring chamber (21) is fed from the oil discharge passage (5) to each lubrication point such as a machine tool. Then, after refueling of each distribution valve is completed, the drive of the electric pump is stopped and the main pipe communicating with the refueling passage (4) is depressurized. By this depressurization, the valve body ( 6) is returned to cut off the communication between the oil supply passage (4) and the oil passage (9), and at the same time, the piston (3) is returned by the spring (7) (see the right side of FIG. 1). From the oil passage (9) to the communication hole (10) of the passage block (12) and the valve body (6). It is introduced to the side of the measuring chamber (21) through the second passage (62) provided in the and is prepared for the next refueling.

Thus, in the above configuration, the cylinder hole (2) formed in the valve body (1) has a sleeve whose upper open side is inserted into the cylinder hole (2) as shown in FIG. A taper portion (2a) having a diameter slightly larger than that of (8) and gradually decreasing toward the oil supply passage (4) side is formed on the lower closing side, and the sleeve (8) is also formed. It is preferable that the same tapered portion (8a) as the tapered portion (2a) of the cylinder hole (2) is formed on the lower side of each. In this case, the work of inserting the sleeve (8) into the cylinder hole (2) is facilitated, and the taper portions (2a) (8a) are slidably contacted with each other to be inserted and fixed. As a result, the sealing property between the sleeve (8) and the cylinder hole (2) is improved, and the lubricating oil is surely prevented from leaking from the oil passage (9) to the oil discharge passage (5) side. it can.

Further, as shown in FIG. 4, the sleeve (8) is provided with an oil drain hole (81) at an intermediate position in the vertical direction corresponding to the oil drain passage (5) of the valve body (1), The lubricating oil measured in the measuring chamber (21) of the cylinder hole (2) is discharged from the oil discharge hole (81) to the oil discharge passage (5) side. By providing a positioning projection (82) for the oil drain hole (81) to be engaged with the open groove (1a) provided in the valve body (1) on a part of the outer circumference opposite to the (81) ,
While engaging the protrusion (82) with the opening groove (1a),
By inserting the sleeve (8) into the cylinder hole (2), the oil drain passage (5) and the oil drain hole (81) can be reliably positioned, and therefore the automatic assembly is performed. At the same time, the position of the oil drain hole (81) and the oil drain passage (5) can be easily and reliably aligned. Further, in the open groove (1a) provided in the valve body (1), as shown in FIG. 5, a guide portion (1b) having a substantially V shape is formed on the upper end side thereof, and the sleeve (8) is formed. It is also possible to facilitate the engagement with the open groove (1a).

Further, although the passage block (12) may be constituted by one member itself, as shown in the embodiments of FIGS. 1, 2 and 3, the passage block (12) has the passage hole (10). Material (12
A) and an end member (12) which faces the measuring chamber (21) of the cylinder hole (2) and receives and supports the sleeve (8).
Alternatively, the end member (12B) and the passage member (12A) may be inserted into the cylinder hole (2) in a vertically stacked state. In this case, a packing (14) for sealing the gap between the insertion hole (11) of the passage block (12) and the valve body (6) inserted into the insertion hole (11) is attached to the passage block (12). The troublesome work of assembling in the insertion hole (11) can be omitted, and the branch passage (4a) of the oil supply passage (4) provided in the valve body (1) and the valve body (6) inserted into the branch passage (4a). ) And the lower surface of the passage block (12) and the lower end surface of the cylinder hole (2) with a packing (15) for sequentially assembling.
That is, when the passage member (12A) and the end member (12B) are integrally formed, a packing accommodating chamber is provided in the middle of the insertion hole (11), and the packing (14) is inserted into the accommodating chamber. It is necessary to assemble it before carrying out the assembling work.
When A) and the end member (12B) are divided, the packing accommodating chamber can be formed on the end surface of the end member (12B), so that the assemblability of the packing (14) is improved and automatic assembly is performed. When it is performed, it can be performed more easily.

In the embodiment shown in the drawings, an opening window (13b) is formed in a part of the lid body (13) to form an indicator for confirming the movement of the piston (3) through the opening window (13b). There is.

(Effects of the Invention) As described above, in the distribution valve of the centralized lubricating device according to the present invention, one end of the cylinder hole (2) provided in the valve body (1) in the length direction is opened and the other end is blind. The valve body (1) is provided with an open groove (1a) extending in the longitudinal direction of the cylinder hole (2), and the cylinder hole (2)
A sleeve (8) is inserted into the cylinder hole (2) to form an oil passage (9) communicating with the rear chamber (22) side of the cylinder hole (2), and the oil passage is provided on the oil passage side of the cylinder hole (2). A lid body for inserting and fitting a passage block (12) having a communication hole (10) communicating with the passageway (9) and an insertion hole (11) for the valve body (6) to be fixed to the valve body (1). The sleeve (8) and the passage block (12) are fixed to the valve body (1) by the (13), while the communication hole (10) is provided in the valve body (6) and the oil supply passage (4) and the cylinder. Since the passages (61) (62) selectively communicating with the measuring chamber (21) of the hole (2) are provided, the passage can be easily processed and the automatic assembly can be easily performed. The cost can be reduced as a whole.

The oil supply passage (4) side of the cylinder hole (2) and the sleeve (8) inserted into the cylinder hole (2) is tapered so as to have a small diameter toward the oil supply passage (4). Thereby, the sealing property between the cylinder hole (2) and the sleeve (8) is improved, and the leakage of the lubricating oil from the oil passage (9) to the oil discharge passage (5) side can be reliably prevented. .

Further, in the sleeve (8), an oil drain hole (81) corresponding to the oil drain passage (5) of the valve body (1) and the oil drain hole (81) engaging with the open groove (1a). With the positioning projection (82), the oil drain hole (81) of the sleeve (8) and the oil drain passage (5) can be positioned reliably, and automatic assembly can be further facilitated.

Further, the passage block (12) is composed of a passage member (12A) having the communication hole (10) and an end member (12B) facing the measuring chamber (21) of the cylinder hole (2). As a result, the packing (14) disposed on the end member (12B) side and on the insertion hole (11) side of the valve body (6) is
The complicated work of previously assembling in the insertion hole (11) can be omitted, and each member (12A) (12B) can be attached to the cylinder without assembling to each member (12A) (12B). When assembling into the hole (2), the packings (14) and (15) can be sequentially incorporated, and automatic assembly can be further facilitated.

[Brief description of drawings]

1 is a partially cutaway front view showing an embodiment of the present invention, FIG.
1 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a vertical sectional side view showing another embodiment, FIG. 4 is a vertical sectional view showing another embodiment of a sleeve, and FIG. FIG. 6 is a partial explanatory view showing another embodiment of the open groove provided, and FIG. 6 is a vertical sectional view showing a conventional example. (1) …… Valve body (1a) …… Open groove (2) …… Cylinder hole (21) …… Measuring chamber (22) …… Rear chamber (3) …… Measuring piston (4) …… Oil supply path ( 5) …… Oil drainage path (6) …… Valve body (61,62) …… Passageway (7) …… Spring (8) …… Sleeve (81) …… Oil drainage hole (82) …… Protrusion (9) ) ...... Oil passage (10) ...... Communication hole (11) ...... Insertion hole (12) ...... Passage block (12A) ...... Passage member (12B) ...... End member (13) ...... Lid body (14, 15) …… Packing

Claims (4)

[Claims] 1. A valve body (1) having a cylinder hole (2),
A metering piston (3) movably mounted in the cylinder hole (2), a valve body (6) and a spring (7),
During refueling, the refueling passage (4) is communicated with the back chamber (22) of the measuring piston (3) to move the measuring piston (3) forward, and the lubricating oil in the measuring chamber (21) is drained. Distributing oil discharged from (5), and when depressurizing, the lubricating oil in the rear chamber (22) is supplied to the measuring chamber (21) by the return movement of the measuring piston (3) by the spring (7). In the valve, one end side in the length direction of the cylinder hole (2) is opened and the other end side is made blind, and an opening groove (in the length direction of the cylinder hole (2) is formed in the valve body (1) ( 1a) is provided, and the sleeve (8) is inserted into the cylinder hole (2) to form an oil passage (9) communicating with the back chamber (22). A passage block (on the oil supply passage side) having a communication hole (10) communicating with the oil passage (9) and an insertion hole (11) for the valve body (6) ( The sleeve (8) is fitted with a lid body (13) that fits the valve body (1) into the valve body (1).
While fixing the passage block (12) to the valve body (1), the valve body (6) and the communication hole (10) are selectively provided in one of the oil supply passage (4) and the measuring chamber (21). A distribution valve for a centralized lubrication system, characterized in that it is provided with passages (61) (62) communicating with the. 2. The oil supply passage (4) side of the cylinder hole (2) and the sleeve (8) inserted into the cylinder hole (2) is
The distribution valve for a centralized lubrication system according to claim 1, wherein the distribution valve has a taper shape having a smaller diameter toward the oil supply passage (4). 3. A sleeve (8) has an oil drain hole (81) corresponding to the oil drain passage (5) of the valve body (1) and the oil drain hole (81) engaging with the open groove (1a). The distribution valve for a centralized lubrication system according to claim 1 or 2, further comprising a positioning projection (82). 4. The passage block (12) comprises a passage member (12A) having a communication hole (10) and an end member (12B) facing the measuring chamber (21), and the end member (12B) side. Centralized lubrication according to claim 1, wherein packings (14) (15) are provided on the insertion hole (11) side of the valve body (6) and on the oil supply passage (4) side of the passage member (12A). Device distribution valve.