WO2015045805A1

WO2015045805A1 - Distributing valve and gasket

Info

Publication number: WO2015045805A1
Application number: PCT/JP2014/073528
Authority: WO
Inventors: 秀次浅井
Original assignee: 株式会社Ｉｈｉ回転機械
Priority date: 2013-09-24
Filing date: 2014-09-05
Publication date: 2015-04-02
Also published as: MY175489A; TW201533371A; CN105637280B; TWI642873B; JP5876452B2; CN105637280A; JP2015064015A

Abstract

This distributing valve has: a top block (1) provided with an injection opening (7); a base block (30); and at least one intermediate block (60) sandwiched between the top block (1) and the base block (30). Each block incorporates a pair of valve spools (15, 45, 75), but meanwhile has a plurality of discharge openings (19, 49, 79). When the top block (1), base block (30), and intermediate block (60) are superposed, a complex pathway is formed within the blocks from the injection opening (7) to each discharge opening (19, 49, 79), and while the complex pathway causes the sequential reciprocating motion of each valve spool by means of a lubricant injected from the injection opening (7), meanwhile the lubricant is sequentially discharged from each discharge opening (19, 49, 79) using the reciprocating motion of each valve spool.

Description

Distribution valve and gasket

The present invention relates to a distribution valve that sequentially discharges injected fluid from a plurality of discharge ports, and a gasket suitable for the distribution valve.

Large vehicles such as trucks and buses, construction machines, industrial machines, and the like include many moving parts such as bearings, and these moving parts require supply of a lubricant. A distribution valve is used for supplying such lubricant, and the distribution valve has a plurality of discharge ports, and sequentially discharges the lubricant from these discharge ports.
It is therefore desirable for this type of dispensing valve to be able to dispense lubricant to as many moving parts as possible.

Such a distribution valve is disclosed in, for example, Patent Document 1, and the distribution valve of Patent Document 1 is assigned to a valve body, an injection port, a plurality of valve spools, and each valve spool integrally formed by aluminum die casting. A discharge port is included (see FIG. 1). When the lubricant is supplied from the supply pump to the injection port, the distribution valve sequentially reciprocates each valve spool by the supplied lubricant, and lubricates from each discharge port using the reciprocation of each valve spool. The agent is discharged sequentially.

Japanese Unexamined Patent Publication No. 2004-232687

In the case of the distribution valve having the integrally formed valve body described above, the number of discharge ports is determined in advance. For example, a standard distribution valve has 8 outlets. For this reason, for example, when supply of lubricant is requested to more than eight movable parts, it is not possible to cope with one distribution valve. Under such circumstances, a plurality of distribution valves are used, but an increase in the distribution valves requires additional auxiliary metal fittings and piping.
In addition, since a distribution valve having an integrally formed valve body is an expensive product, the use of a plurality of distribution valves not only increases the burden on the user, but also requires a large space for installing the distribution valve.

An object of the present invention is to provide a distribution valve and a gasket that can easily cope with the distribution of fluid to many distribution points.

The above objective is accomplished by a distribution valve according to the present invention, which comprises:
A first block, a first block body, an inlet formed in the first block body and into which fluid is injected, a plurality of first valve spools built in the first block body, and the first block A first discharge port formed in one block body and assigned to each of the first valve spools; and a first fluid path formed in the first block body and into which fluid from the inlet flows. 1 block,
A second block that can be superposed on the first block, the second block body, a plurality of second valve spools built in the second block body, and the second block body; A second block including a second discharge port assigned to each valve spool, and a second fluid passage formed in the second block body and into which fluid from the injection port flows;
A third block which is disposed between the first block and the second block as required and can be overlaid on the first and second blocks, the third block body and the third block body A plurality of third valve spools, a third discharge port formed in the third block body and assigned to each third valve spool, and a fluid formed from the injection port formed in the block body. A third block including a third fluid path into which the fluid flows;
The first to third blocks in a state where the first block and the second block are directly overlapped or at least one third block is interposed between the first block and the second block Comprising a composite path formed by a combination of the first fluid path and the second fluid path or a combination of the first to third fluid paths when
The composite path sequentially reciprocates the valve spool by the fluid injected from the injection port, and sequentially discharges liquid from the corresponding discharge port according to the reciprocation of the valve spool.

According to the distribution valve described above, the number of third blocks to be arranged between the first block and the second block is selected according to the required number of discharge ports, and the distribution valve of the present invention is required. It can have a number of outlets.
Preferably, the distribution valve further includes a plurality of fastening members that pass through the plurality of blocks overlapped with each other and fasten the blocks to each other. In this case, a plurality of types of fastening members having different lengths are prepared in advance according to the number of blocks included in the distribution valve.

Preferably, the distribution valve further comprises a sealing element interposed between the two blocks superimposed on each other. In this case, the composite path includes a relay section that allows connection of two valve spools between two blocks adjacent to each other with the seal element interposed therebetween, and the relay section is formed in the seal element. It has a bore and a relay hole formed in each of the two blocks.
The sealing element described above prevents fluid leakage between adjacent blocks. Both the bore and the relay hole of the relay section described above only extend in a two-dimensional plane.
For example, the sealing element described above further includes a substrate having the plurality of bores, and a plurality of elastic seals respectively covering at least the outer periphery of the substrate and the inner periphery of the bore.

The present invention also provides a gasket suitable for the distribution valve and the like described above. The gasket of the present invention includes a substrate sandwiched between two members to be sealed, a plurality of bores formed in the substrate, and a plurality of elastic seals respectively covering at least the outer periphery of the substrate and the inner periphery of the bore. Is provided.

In the distribution valve of the present invention, the number of third blocks to be sandwiched between the first block and the second block is selected according to the required number of distribution points, and the increase or decrease of the distribution points can be reduced. It can be easily handled alone. Therefore, the distribution valve of the present invention does not require the above-described auxiliary metal fittings and piping, and the space required for the installation is also small.

Also, the assembly of the distribution valve of the present invention is facilitated by the use of a fastening member. In addition, the sealing element (gasket) and the relay section cooperate to facilitate a fluid connection between adjacent blocks (members) while providing a good seal between the blocks (members).

It is a perspective view which shows the external appearance of the distribution valve which concerns on 1st Embodiment of this invention. It is a side view of the distribution valve seen from the arrow A in FIG. It is a rear view of the distribution valve seen from the arrow B in FIG. It is a decomposition | disassembly side view of the distribution valve which shows that the discharge port can be increased / decreased. It is a disassembled perspective view of the distribution valve of 1st Embodiment. FIG. 5 is a cross-sectional view of the top block along the line CC in FIG. 4. FIG. 5 is a cross-sectional view of the intermediate block along the line DD in FIG. 4. It is sectional drawing of the base block which follows the EE line | wire in FIG. It is a top view which shows the gasket inserted | pinched between block parts. FIG. 10 is a cross-sectional view of a part of the gasket along the line FF in FIG. 9. It is a perspective view which shows roughly the compound path | route in a distribution valve. FIG. 3 is a developed view of a cross section of a distribution valve taken along line GG in FIG. 2. It is a disassembled perspective view which shows the distribution valve of 2nd Embodiment. It is a disassembled perspective view which shows the distribution valve of 3rd Embodiment.

A plurality of embodiments according to the distribution valve of the present invention will be sequentially described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a distribution valve according to the first embodiment, and this distribution valve is used for fluid distribution. The fluid here may have viscosity, and examples of such viscous fluid include lubricants such as grease. 2 and 3 show the side and back of the distribution valve, respectively, and FIG. 4 clearly shows the main features of the distribution valve according to the present invention.

As is apparent from FIGS. 1 to 3, the distribution valve of the first embodiment includes a top block (first block) 1, a base block (second block) 30, and a single block disposed between these

blocks

1 and 30. One intermediate block (third block) 60. Among these

blocks

1, 30, 60, the top block 1 is arranged at the highest level, while the base block 30 is arranged at the lowest level.

In the case of such a distribution valve, the intermediate block 60 and the top block 1 are sequentially stacked on the base block 30 along the longitudinal axis of the distribution valve. In the case of the present invention, the number of intermediate blocks 60 is not limited to one, and as is apparent from FIG. 4, the distribution valve can include a plurality of intermediate blocks 60. For example, the distribution valve of FIG. 4 includes three intermediate blocks 60.
Further, gaskets 2 as sealing elements are respectively arranged between the blocks included in the distribution valve, and these gaskets 2 seal the above-mentioned top block 1, base block 30 and intermediate block 60, and seal between adjacent blocks. To do.

In the case of the present embodiment, the top block 1, the base block 30, and the intermediate block 60 each have four discharge ports. Therefore, when the number of outlets required for the distribution valve is larger than the standard number (for example, 8), the number of intermediate blocks 60 to be arranged between the top block 1 and the base block 30 is determined by the distribution valve. It is determined according to the total number of discharge ports required. Since the distribution valve of the first embodiment includes only one intermediate block 60, it has 12 discharge ports.

FIG. 5 is an exploded perspective view of the distribution valve of the first embodiment. 6 is a cross-sectional plan view of the top block 1 taken along a plane perpendicular to the vertical axis, and FIGS. Each is shown.
9 and 10 show a plan view of the gasket 2 and a sectional view of a part of the gasket 2, respectively. Further, FIG. 11 schematically shows a composite path of the lubricant formed in the distribution valve of the first embodiment, and FIG. 12 is a developed sectional view of the distribution valve along the line GG in FIG. .

First, the top block 1 will be described with reference to FIG.
The top block 1 includes a block body (first block body) 3, and the block body 3 has, for example, a flat and substantially rectangular parallelepiped shape. As shown in FIG. 1, a bulging portion 5 is integrally formed at the center of the upper surface of the block body 3. The bulging portion 5 has a substantially circular pipe shape and extends to the front surface of the block body 3 in the front-rear direction of the distribution valve, and has an end surface flush with the front surface. The bulging portion 5 defines an injection port 7 therein, and the injection port 7 opens at the end face of the bulging portion 5. A check valve 5a is arranged in the injection port 7, and this check valve 5a is schematically shown in FIGS.

Furthermore, the block body 3 has a vertical hole 9 along the longitudinal axis inside thereof, and the vertical hole 9 has one end and the other end. One end of the vertical hole 9 communicates with the injection port 7, and the other end of the vertical hole 9 opens at the center of the lower surface of the block body 3. Therefore, the lubricant such as grease injected into the injection port 7 is guided from the injection port 7 to the lower surface of the block body 3 through the check valve 5 a and the vertical hole 9.

Furthermore, a pair of cylinder bores are formed in the block body 3. These cylinder bores are arranged at the front and rear portions of the block body 3 so as to sandwich the vertical hole 9 (vertical axis), and extend parallel to each other in the direction perpendicular to the vertical hole 9, that is, the width direction of the block body 3.

The pair of cylinder bores penetrates the block body 3 and opens on the left and right side surfaces of the block body 3, respectively. The open ends of the cylinder bores are respectively closed by plugs 11, and these plugs 11 form a pair of cylinder bores as a pair of spool

accommodating chambers

13a, 13b. Valve spools (first valve spools) 15 a and 15 b are accommodated in the

spool accommodating chambers

13 a and 13 b, respectively, and these valve spools 15 reciprocate in the axial direction of the spool accommodating chamber 13 in the corresponding spool accommodating chambers 13. Is possible.

Both ends of the valve spool 15a cooperate with the corresponding plug 11 to form a pair of

end chambers

16a and 16b in the spool accommodating chamber 13a. Also, both ends of the valve spool 15b cooperate with the corresponding plug 11 to form a pair of

end chambers

16a and 16b in the spool accommodating chamber 13b.

Each of the valve spools 15 a and 15 b has a small diameter portion, and these small diameter portions are disposed in the central portion of the valve spool 15 when viewed in the axial direction of the corresponding valve spool 15. Such a small diameter portion forms an annular chamber 17a in the corresponding spool accommodating chamber 13 respectively.
Furthermore, each

valve spool

15a, 15b has a pair of annular grooves 17b on its outer periphery, and these annular grooves 17b are arranged at a predetermined distance from the annular chamber 17a of the corresponding valve spool 15. In the case of this embodiment, the pair of annular grooves 17b have a substantially V-shaped cross section.

As described above, four discharge ports (first discharge ports) are formed in the block body 3, and two of the

discharge ports

19a and 19b are arranged on the front side of the block body 3, The remaining

discharge ports

19 c and 19 d are arranged on the rear surface side of the block body 3.

Specifically, the

discharge ports

19a and 19b each have one end and the other end. One end of the

discharge ports

19a and 19b is opened at the front surface of the block body 3, while the other end of the

discharge ports

19a and 19b is opened at the inner surface of the spool housing chamber 13a. The other ends of the

discharge ports

19a and 19b are arranged away from each other in the axial direction of the valve spool 15a, and when the valve spool 15a is reciprocated, one of the corresponding sides of the pair of annular grooves 17b of the valve spool 15a Communication is possible. Specifically, when the valve spool 15a moves forward or backward, the communication of the

discharge ports

19a and 19b with the corresponding annular groove 17b is achieved alternately.

The

discharge ports

19c and 19d also have one end and the other end, respectively. As is apparent from FIG. 6, one end of the

discharge ports

19c and 19d opens at the rear surface of the block body 3, and the other end of the

discharge ports

19c and 19d opens at the inner surface of the spool housing chamber 13b. The other ends of the

discharge ports

19c and 19d are arranged away from each other in the axial direction of the valve spool 15b. Similarly to the

discharge ports

19a and 19b described above, when the valve spool 15b is reciprocated, the other ends of the

discharge ports

19c and 19d can communicate with one of the corresponding sides of the pair of annular grooves 17b of the valve spool 15b. In the forward or backward movement of the valve spool 15b, the communication of the

discharge ports

19c and 19d with the corresponding annular groove 17b is alternately achieved.

The flat lower surface of the block body 3 is overlaid on the intermediate block 60 described later via the gasket 2. One relay hole 21a is opened at one end of the lower surface of the block body 3 in the first overlap region overlapping the valve spool 15a in the direction along the vertical axis. The relay hole 21a and the vertical hole 9 are arranged on the same line along the front-rear direction of the distribution valve. The relay hole 21a extends along the vertical axis from the lower surface of the block body 3 toward the spool housing chamber 13a, and the other end of the relay hole 21a is opened at the inner surface of the spool housing chamber 13a.

Furthermore, a pair of relay holes 21b are opened at one end of the first overlap region. These relay holes 21b are arranged on both sides of the relay hole 21a as viewed in the axial direction of the valve spool 15a, and extend in parallel with the relay hole 21a. The other end of the pair of relay holes 21b is opened at the inner surface of the spool housing chamber 13a. Specifically, the relay hole 21a is positioned so as to communicate with the annular chamber 17a regardless of the reciprocation of the valve spool 15a.

On the other hand, in the present embodiment, the pair of relay holes 21b include first and second hole elements that are parallel to each other. The first hole element of the pair of relay holes 21b can communicate with one of the corresponding sides of the pair of annular grooves 17b by reciprocating movement of the valve spool 15a. The communication between the pair of relay holes 21b, that is, the first hole elements, with respect to the annular groove 17b on the side to be performed is achieved alternately.

Further, regarding the second hole elements of the pair of relay holes 21b, these second hole elements are alternately communicated with the annular chamber 17a when the valve spool 15a moves forward or backward.
A relay hole 23a is opened at one end of the second overlap region overlapping the valve spool 15b on the lower surface of the block body 3. The relay hole 23a is arranged on the same line as the vertical hole 9 and the relay hole 21a, and extends from the lower surface of the block body 3 toward the spool housing chamber 13b. Open.

In the second overlap region, a pair of relay holes 23b are also opened at one end thereof. These relay holes 23b are respectively arranged on both sides of the relay hole 23a, that is, on both ends of the spool accommodating chamber 13b as viewed in the axial direction of the valve spool 15b. The pair of relay holes 23b extends in parallel with the relay hole 23a, and the other ends of the pair of relay holes 23b are opened on the inner surface of the spool housing chamber 13b.

Specifically, the relay hole 23a communicates with the annular chamber 17a regardless of the reciprocating motion of the valve spool 15b. On the other hand, the pair of relay holes 23b is opened or closed by the corresponding end of the valve spool 15b when the valve spool 15b moves forward or backward. For example, when the valve spool 15b is moved toward the end chamber 16a, the relay hole 23b on the end chamber 16a side is closed at a corresponding end of the valve spool 15b, while one end of the valve spool 15b is closed to the end chamber. Reduce the volume of 16a. At this time, the other end of the valve spool 15b opens the relay hole 23b on the end chamber 16b side to increase the volume of the end chamber 16b.

Conversely, when the valve spool 15b is moved toward the end chamber 16b, the opening / closing of the pair of relay chambers 23b and the increase / decrease in the volumes of the

end chambers

16a, 16b are reversed from those described above.
A pair of switching holes 27 are formed inside the block body 3, and these switching holes 27 have one end and the other end. One end of the pair of switching holes 27 can communicate with the

end chambers

16a and 16b on the spool housing chamber 13a side. On the other hand, the other ends of the pair of switching holes 27 are opened at the inner surface of the spool housing chamber 13b, and the other ends of these switching holes 27 are in the central region of the spool housing chamber 13b as viewed in the axial direction of the valve spool 15b. The valve spools 15b are spaced apart from each other in the axial direction.

Specifically, when the valve spool 15a is reciprocated, one end of the pair of switching holes 27 is opened or closed at the corresponding end of the valve spool 15a, while the valve spool 15b is moved forward or backward. During operation, the other ends of the pair of switching holes 27 communicate with the annular chamber 17a of the spool housing chamber 13b alternately.
The relay holes 21 and 23 and the switching hole 27 described above form a first fluid path, that is, a first lubricant path X that guides the flow of the lubricant injected from the injection port 7.
Incidentally, the block body 3 has bolt insertion holes 28 a, and these bolt insertion holes 28 a are respectively arranged at the four corners of the block body 4.

Next, the base block 30 will be described with reference to FIG.
The base block 30 includes a block body 33 (second block body), and the block body 33 has the same shape as the block body 3 of the top block 1 described above (see also FIGS. 1 to 5).
The block body 33 has a flat upper surface and lower surface. The upper surface of the block body 33 is overlaid on the upper surface of an intermediate block 60 described later via the gasket 2, while the base plate 35 is overlaid on the lower surface of the block body 33 (see FIGS. 1 to 5).

In the block body 33, as in the case of the block body 3, a pair of spool

accommodating chambers

43a and 43b which are parallel to each other are formed, and both ends of the

spool accommodating chambers

43a and 43b are respectively closed by plugs 31. A pair of valve spools 45a and 45b (second spools) are housed in the

spool housing chambers

43a and 43b, respectively. Both end portions of the valve spools 45a and 45b

form end chambers

46a and 46b in cooperation with the plugs 31 in the corresponding spool accommodating chambers 13, respectively.

The valve spool 45a has a pair of small diameter portions, and these small diameter portions form a pair of

annular chambers

44a and 44b in the spool housing chamber 43a. The

annular chambers

44a and 44b are arranged apart from each other at the central portion of the spool housing chamber 43a when viewed in the axial direction of the valve spool 45a.
On the other hand, the valve spool 45b has one small-diameter portion like the above-described

valve spools

15a and 15b, and this small-diameter portion forms an annular chamber 47a in the spool accommodating chamber 43b. The annular chamber 47a is disposed at the center of the spool housing chamber 43b when viewed in the axial direction of the valve spool 45b.

A pair of grooves, for example, a pair of V-shaped grooves 47b are formed on the outer periphery of the valve spool 45b. These V-shaped grooves 47b are arranged on the small diameter portion, that is, on both sides of the annular chamber 47a as viewed in the axial direction of the valve spool 45b.
Similarly to the block body 3, the block body 33 also has a front surface and a rear surface. A pair of

discharge ports

49a and 49b (second discharge ports) are formed in the front portion of the block body 33, and the

discharge ports

49a and 49b open to the front surface of the block body 33 at one end thereof. The other ends of the

discharge ports

49a and 49b are opened on the inner surface of the spool housing chamber 43a, and when the valve spool 45a is reciprocated, the other end is opened or closed by the valve spool 45a.

Furthermore, a pair of

discharge ports

49c and 49d (second discharge ports) are formed in the rear portion of the block body 33, and the

discharge ports

49c and 49d open on the rear surface of the block body 33 at one end thereof. The other ends of the

discharge ports

49c and 49d are opened on the inner surface of the spool housing chamber 43b, and when the valve spool 45b is reciprocated, it is opened or closed by the valve spool 45b.

Specifically, when the valve spool 45a moves forward or backward, the

discharge ports

49a and 49b communicate with the

annular chambers

44a and 44b, respectively, but these communication are achieved alternately. On the other hand, when the valve spool 45b moves forward or backward, the

discharge ports

49c and 49d communicate with the corresponding annular grooves 47b, respectively, but these communications are also achieved alternately.
Note that one end of the discharge ports 49a to 49d and one end of the corresponding discharge ports 19a to 19d on the top block 1 side are arranged on the same line along the vertical axis of the distribution valve.

In the first overlap region of the upper surface of the block body 33 that overlaps the valve spool 45a, the relay hole 53a opens at one end, and the other end of the relay hole 53a opens to the inner surface of the spool housing chamber 43a. The relay hole 53 a is disposed so as to be coaxial with the relay hole 21 a of the top block 1. Further, a pair of relay holes 53b are formed in the first overlap region of the block body 33 in parallel with the relay holes 53a. These relay holes 53b are arranged on both sides of the relay hole 53a, that is, on both ends of the spool housing chamber 43a, respectively, when viewed in the axial direction of the valve spool 45a. The pair of relay holes 53b open at one end to the upper surface of the block body 33, and the other ends of the relay holes 53b open to the inner surface of the spool housing chamber 43a.

Specifically, when the valve spool 45a is reciprocated, the relay hole 53a communicates with the

annular chambers

44a and 44b alternately. On the other hand, when the valve spool 45a moves forward or backward, for example, when the volume of one of the

end chambers

46a and 46b is reduced or increased, the relay hole 53 on the one end chamber 46 side is It is closed or opened by the end of the corresponding side valve spool 45a.

Further, a relay hole 51a and a pair of relay holes 51b are formed in a second overlap region overlapping the valve spool 45b on the upper surface of the block body 33. The relay hole 51a and the pair of relay holes 51b are arranged in the same layout as the relay hole 21a and the pair of

relay holes

21a and 21b of the top block 1. Therefore, each relay hole 51b also includes first and second hole elements parallel to each other.

Therefore, the relay hole 51a communicates with the annular chamber 47a regardless of the reciprocation of the valve spool 45b. On the other hand, when the valve spool 45b moves forward or backward, the first hole elements of the pair of relay holes 51b communicate with the corresponding annular grooves 47b, respectively, but these communication are achieved alternately. Similarly, when the valve spool 45b moves forward or backward, the second hole elements of the pair of relay holes 51b communicate with the annular chamber 47a alternately.

A pair of switching holes 57 are formed in the block body 33. One ends of these switching holes 57 can communicate with the

end chambers

46a and 46b on the spool accommodating chamber 43b side. The other ends of the pair of switching holes 57 open at the inner surface of the spool housing chamber 43a and are separated from each other in the axial direction of the valve spool 45a.
Specifically, when the valve spool 45b is reciprocated, one end of the pair of switching holes 57 is opened or closed by the end of the corresponding valve spool 45b. On the other hand, when the valve spool 45b moves forward or backward, the other ends of the pair of switching holes 57b communicate with the

annular chambers

44a and 44b alternately.

The relay holes 51 and 53 and the switching hole 57 of the block body 33 described above form a second fluid path for the lubricant, that is, a second lubricant path Y.
The block body 33 also has four bolt insertion holes 28b as in the block body 3, and these bolt insertion holes 28b are arranged at the four corners of the block body 34, respectively. Further, the base plate 35 has four screw holes 115 (see FIG. 5) on the upper surface thereof, and these screw holes 115 are arranged at the four corners of the base plate 35, respectively.

Next, the intermediate block 60 will be described with reference to FIG.
The intermediate block 60 includes a block body (third block body) 63, and the block body 63 has the same shape as the

block bodies

3 and 33 described above (see also FIGS. 1 to 5).
The block body 63 has a flat upper surface and lower surface. The upper surface of the block body 63 is superimposed on the lower surface of the block body 3 via the gasket 2, while the lower surface of the block body 63 is superimposed on the upper surface of the block body 33 via the gasket 2.

In addition to the block body 63, the intermediate block 60 includes a vertical hole 9a, four plugs 71, a pair of

spool housing chambers

73a and 73b, a pair of valve spools 75a and 75b (third valve spool), and each valve spool 75a, One annular chamber 77a that forms a pair with 75b, a pair of annular grooves 77b and

end chambers

76a and 76b that form a pair with each

valve spool

75a, 75b, and four discharge ports 79a to 79d (third discharge ports). Including. 6 and 7, these components are substantially the same as the corresponding components of the intermediate block 60 described above. Therefore, in order to avoid duplication of explanation, Such detailed description is omitted.

In the case of the present embodiment, for example, the valve spool 75b additionally includes an indicator rod 62 in order to output the movement of the valve spools 75a and 75b to the outside and to make the current position of the valve spools 75a and 75b visible from the outside. be able to. The indicator rod 62 extends from one end of the valve spool 75b, and penetrates the corresponding plug 71 in a liquid-tight manner, and always protrudes outside the intermediate block 60.

A relay hole 83a is opened at one end of the upper surface of the block body 63 in the first overlap region overlapping the valve spool 75a (see FIGS. 11 and 12). As is apparent from FIG. 11, the relay hole 83a is arranged coaxially with the relay hole 21a of the top block 1, and the other end of the relay hole 83a opens at the inner surface of the spool housing chamber 73a.
The first overlap region of the block body 63 has a pair of relay holes 83b parallel to the relay holes 83a. These relay holes 83b are arranged on both sides of the relay hole 83a, that is, on both ends of the spool housing chamber 73a, respectively, when viewed in the axial direction of the valve spool 75a. One end of the pair of relay holes 84b opens at the upper surface of the block body 63, and the other end of the relay holes 84b opens at the inner surface of the spool housing chamber 73a.

Specifically, the relay hole 83a communicates with the annular chamber 77a regardless of the reciprocating motion of the valve spool 75a. On the other hand, when the valve spool 75a moves forward or backward, the pair of relay holes 83b are closed or opened by the end of the corresponding valve spool 75a.
Of the upper surface of the block body 63, the second overlap region overlapping the valve spool 75b has a relay hole 81a and a pair of relay holes 81b, as shown in FIGS. One end of the relay hole 81a and the pair of relay holes 81b opens on the upper surface of the block body 63, and the other end of the relay hole 81a and the pair of relay holes 81b opens on the inner surface of the spool housing chamber 73b.

The arrangement of the relay hole 81a and the pair of relay holes 81b is the same as the arrangement of the relay hole 21a and the pair of

relay holes

21a and 21b of the top block 1. That is, when considering the longitudinal section of the distribution valve including the longitudinal axis (

vertical holes

9, 9a) and parallel to the axis of the valve spools 15, 75, the

relay holes

81a, 81b and the

relay holes

21a, 21b are perpendicular to the longitudinal section. Are arranged symmetrically. Each relay hole 81b also includes the first and second hole elements, like the relay hole 21b.
Therefore, the relay hole 81a communicates with the annular chamber 77a regardless of the reciprocation of the valve spool 75b. On the other hand, when the valve spool 75b moves forward or backward, the first hole elements of the pair of relay holes 81b communicate with the corresponding annular grooves 77b, and the communication here is alternately achieved. When the valve spool 75b moves forward or backward, the second hole elements of the pair of relay holes 81b communicate with the annular chamber 77a alternately.

Of the lower surface of the block body 63, the third overlap region overlapping the valve spool 75a has a relay hole 91a and a pair of relay holes 91b as shown in FIGS. The relay holes 91a and the pair of relay holes 91b open to the lower surface of the block body 63 at one end, and the other ends of the relay holes 91a and the pair of relay holes 91b open to the inner surface of the spool housing chamber 73a.
The relay hole 91 a is disposed coaxially with the relay hole 53 a of the base block 30. The pair of relay holes 91b are arranged on both sides of the relay hole 91a when viewed in the axial direction of the valve spool 75a, and include first and second hole elements.

Regardless of the reciprocation of the valve spool 75a, the relay hole 91a communicates with the annular chamber 77a. On the other hand, when the valve spool 75a moves forward or backward, the first hole elements of the pair of relay holes 91b communicate with the corresponding annular grooves 77b, and these communication are achieved alternately. When the valve spool 75a moves forward or backward, the second hole elements of the pair of relay holes 91b communicate with the annular chamber 77a alternately.

Further, the fourth overlap region overlapping the valve spool 75b on the lower surface of the block body 63 has a relay hole 93a and a pair of relay holes 93b, as shown in FIGS. One end of the relay hole 93a and the pair of relay holes 93b is opened on the lower surface of the block body 63, and the other end of the relay hole 93a and the pair of relay holes 93b is opened on the inner surface of the spool housing chamber 73b.
The relay hole 93 a is disposed coaxially with the top block 1, that is, the relay hole 23 a of the block body 3, and the pair of relay holes 93 b are disposed coaxially with the pair of relay holes 23 b of the block body 3.

Therefore, the relay hole 93a communicates with the annular chamber 77a regardless of the reciprocation of the valve spool 75b. On the other hand, when the valve spool 75b moves forward or backward, the pair of relay holes 93b communicate with the corresponding annular grooves 77b, and these communication are achieved alternately. The relay holes 81, 83, 91, 93 described above form a third fluid path for the lubricant, that is, a third lubricant path Z.
The block body 63 also has four bolt insertion holes 28 c, and these bolt insertion holes 28 c are arranged at the four corners of the block body 64, respectively.

9 and 10 show the gasket 2 described above. The gasket 2 is disposed between the

blocks

1 and 60 and between the blocks 60 and 30 (see FIG. 11). The gasket 2 includes a plate-like substrate 100, and this substrate 100 has the same external shape as the

block bodies

3, 33, 63 described above.
The gasket 2 has a center bore 103 at the center thereof, and the center bore 103 extends in the front-rear direction of the distribution valve. The gasket 2 has four side bores 105 around the center bore 103. Two side bores 105 are arranged on the left and right sides of the center bore 103 and extend parallel to each other in a direction perpendicular to the longitudinal direction of the center bore 103, that is, in the width direction of the distribution valve.

Further, the gasket 2 includes a plurality of elastic seals 101. These elastic seals 101 are made of a sealing material such as rubber or plastic, and are coated on the outer peripheral portion of the substrate 100 and the inner peripheral portions of the center bore 103 and the side bore 105, respectively.
The board 100 also has four bolt insertion holes 28d, and these bolt insertion holes 28d are arranged at the four corners of the board 100, respectively.

Specifically, if attention is paid to the gasket 2 of the top block 1 and the intermediate block 60, the center bore 103 of the gasket 2 has the vertical hole 9 through the relay holes 21a and 23a of the top block 1 and the relay holes 81a and 83a of the intermediate block 60. Further, if attention is paid to the gasket 2 between the intermediate block 60 and the base block 30, the center bore 103 of the gasket 2 communicates the vertical hole 9a with the relay holes 91a and 93a of the intermediate block 60. Then, the relay holes 51a and 53a of the base block 30 are communicated with each other (see two places α1 shown in FIG. 11).

On the other hand, the four side bores 105 of the gasket 2 form part of a relay section that fluidly connects two adjacent blocks (valve spools) sandwiching the gasket 2 (four locations in FIG. 11). See α2). The side bore 105 only extends two-dimensionally rather than three-dimensionally (see FIG. 12).
Specifically, focusing on the gasket 2 between the top block 1 and the intermediate block 60, the four side bores 105 of the gasket 2 have four gap passages between the top block 1 and the intermediate block 60. 106 is formed. As shown in FIG. 12, such a gap passage 106 communicates the relay hole 21b and the relay hole 83b on the same side in the top block 1 and the intermediate block 60, while the relay hole 23b and the relay hole on the same side. 81b is made to communicate.

On the other hand, paying attention to the gasket 2 between the intermediate block 60 and the base block 30, the four side bores 105 of the gasket 2 form four gap passages 106 between the intermediate block 60 and the base block 30. To do. These clearance passages 106 communicate the relay hole 91b and the relay hole 53b on the same side in the intermediate block 60 and the base block 30, while communicating the relay hole 93b and the relay hole 51b on the same side.
The gap passage 106 described above forms a two-dimensional passage (refer to the portion α2) extending in the left-right direction of the distribution valve, that is, in the width direction thereof, and is adjacent to the two valves along the vertical axis with the gasket 2 interposed therebetween. Allows connection between spools in cooperation with relay holes.

As is clear from the above description, the distribution valve of the first embodiment includes the top block 1, the intermediate block 60 and the base block 30 which are overlapped with each other via the gasket 2. When these

blocks

1, 60, 30 are overlapped, the bolt insertion holes 28 a, 28 c, 28 b of these blocks and the bolt insertion holes 28 d of the gasket 2 are aligned with each other to form four bolt insertion holes 28. Bolts 110 as fastening members are respectively inserted into these bolt insertion holes 28, and these bolts 110 are screwed into the screw holes 115 of the base plate 35 and fasten the

blocks

1, 60 and 30 together via the base plate 35 (see FIG. 5).

Therefore, even if the number of intermediate blocks 60 to be sandwiched between the top block 1 and the base block 30 is increased, the distribution valve can be assembled in the same manner. In this case, the total number of discharge ports provided by the distribution valve is determined by the number of blocks.
The distribution valve of the present invention may include only the top block 1, the base block 30, and the base plate 35.

According to the distribution valve of the first embodiment, the top block 1, the intermediate block 60, and the base block 30 include the above-described lubricant paths X, Y, Z (the lubricant paths include the center of the gasket 2 and the side bores 103, 105). ). When the distribution valve is assembled, the lubricant passages X, Y, and Z cooperate with each other to form a composite path from the injection port 7 to the discharge ports 19, 79, and 49, respectively. Allows lubricant to be discharged from each.

Specifically, the compound path in the distribution valve exhibits a function of alternately introducing the lubricant into a pair of end chambers that form a pair with each valve spool, while alternately switching the moving direction of each valve spool. Here, the switching of the moving direction is sequentially performed for each valve spool.
As a result, according to the distribution valve of the present invention, the lubricant injected from the injection port 7 sequentially reciprocates the valve spool (15, 45, 75) regardless of the number of intermediate blocks 60 included in the distribution valve. On the other hand, the discharge is sequentially performed from the discharge ports (19a to 79d) according to the forward or backward movement of the valve spool.

Next, the operation of the distribution valve of the first embodiment will be described with reference to the development view of FIG. The distribution valve of the first embodiment has a total of 12 discharge ports.
A supply pump (not shown) of a lubricant (for example, grease) is connected to the inlet 7 of the distribution valve, while each discharge port of the distribution valve has various movable parts (not shown) such as a bearing that requires the lubricant. ). In this state, the supply pump is driven, and the lubricant is supplied from the supply pump to the inlet 7 of the distribution valve.

Thereafter, the lubricant is introduced into the

vertical holes

9 and 9a from the injection port 7 through the check valve 5a, from which the center bore 103 of each gasket 2, the relay holes in the

blocks

1, 60 and 30, and After passing through the annular chamber, first, it is introduced into one end chamber of the pair of end chambers that form a pair with each of the valve spools 15a, 15b, 45a, 45b, 75a, 75b. The introduction of such a lubricant is shown in a dod pattern in FIG.

Specifically, the lubricant includes the end chamber 16b of the valve spool 15a, the end chamber 76a of the valve spool 75a, the end chamber 46a of the valve spool 45b, the end chamber 16a of the valve spool 15b, the end chamber 76b of the valve spool 75b, the valve The end chambers 46b of the spool 45a are sequentially introduced, and the lubricant in these end chambers moves each of the corresponding valve spools in one direction, that is, moves forward.

The forward movement of the valve spool 15a pushes out the lubricant already introduced into the end chamber 16a of the valve spool 15a from the end chamber 16a. In this case, the extruded lubricant is discharged from the discharge port 19d by a certain amount through the switching hole 27 and the annular groove 17b of the valve spool 16b. The amount of lubricant discharged here is determined by the moving distance of the valve spool 15a.
The forward movement of the valve spool 75a pushes out the lubricant already introduced into the end chamber 76b of the valve spool 75a from the end chamber 76b. In this case, the extruded lubricant is discharged from the discharge port 19a via the relay hole 83b, the gap passage 106, the relay hole 21b, and the annular groove 17b of the valve spool 15a, and the discharge amount here is also constant.

The forward movement of the valve spool 45b pushes out the lubricant already introduced into the end chamber 46b of the valve spool 45b from the end chamber 46b. In this case, the extruded lubricant is discharged from the discharge port 49a by a certain amount through the switching hole 57 and the annular chamber 44b of the valve spool 45a.
The forward movement of the valve spool 15b pushes out the lubricant already introduced into the end chamber 16b of the valve spool 15b from the end chamber 16b. In this case, the pushed-out lubricant is discharged from the discharge port 79c by a certain amount through the relay hole 23b, the gap passage 106, the relay hole 81b, and the annular groove 77b of the valve spool 75b.

The forward movement of the valve spool 75b pushes out the lubricant already introduced into the end chamber 76a of the valve spool 75b from the end chamber 76a. In this case, the pushed-out lubricant is discharged from the discharge port 49d by a certain amount through the relay hole 93b, the gap passage 106, the relay hole 51b, and the annular groove 47b of the valve spool 45b.
The forward movement of the valve spool 45a pushes out the lubricant already introduced into the end chamber 46b of the valve spool 45a from the end chamber 46b. In this case, the pushed-out lubricant is discharged from the discharge port 79a by a certain amount through the relay hole 53b, the gap passage 106, the relay hole 91b, and the annular chamber 77a of the valve spool 75a.

When the forward movement of the valve spool reaches the maximum allowable stroke and the movement of these valve spools is stopped, the lubricant supplied to the injection port 7 flows into the annular chamber 77a, the relay hole 91b, the clearance passage of the valve spool 75a. 106 and the relay hole 53b are introduced into the end chamber 46b of the valve spool 45a. As a result, the lubricant in the end chamber 46b moves the valve spool 45a in the direction of the arrow a in FIG.

Here, the backward movement of the valve spool 45a pushes out the lubricant from the end chamber 46a of the valve spool 45a. In this case, the extruded lubricant is discharged from the discharge hole 79b by a certain amount through the relay hole 53b, the gap passage 106, the relay hole 91b, and the annular groove 77b of the valve spool 75a.
On the other hand, the backward movement of the valve spool 45a switches the switching hole 57 to be communicated with the annular chamber 44a. Therefore, the relay hole 53a communicates with the end chamber 46b of the valve spool 45b through the switching hole 57, the lubricant is introduced into the end chamber 46b of the valve spool 45b, and the valve spool 45b in the direction of the arrow b in FIG. Will return. Such backward movement of the valve spool 45b pushes out the lubricant from the end chamber 46a. In this case, the extruded lubricant is discharged from the discharge hole 49b by a certain amount through the switching hole 57 and the annular chamber 44a.

Since the return movement of the valve spool 45b described above causes the annular chamber 47b and the relay hole 51b to communicate with each other, the lubricant is introduced into the end chamber 76a of the valve spool 75b, and the valve spool 75b is moved in the direction of arrow c in FIG. It is returned. The backward movement of the valve spool 75b pushes out the lubricant from the end chamber 76b of the valve spool 75b. The extruded lubricant is discharged from the discharge hole 49c by a certain amount through the relay hole 93b, the gap passage 106, the relay hole 51b, and the annular groove 47b.

Thereafter, the valve spools 15b, 15a, and 75a are sequentially returned in the directions indicated by the arrows d to f in FIG. 12, whereby the lubricant is sequentially discharged from the

discharge holes

79d, 19c, and 19b by a predetermined amount. .
The switching between the forward and backward movement of the valve spool described above is repeated sequentially while the lubricant is supplied to the injection port 7, and a certain amount of lubricant corresponding to the moving distance of the valve spool is handled from each discharge port. It is sent out sequentially toward the movable part.
In other words, the distribution valve can distribute a certain amount of lubricant sequentially from the 12 discharge ports to 12 locations that require lubrication.

The distribution valve of the first embodiment has a total of 12 discharge ports, but the distribution valve of the present invention can easily increase or decrease the number of discharge ports as required.
FIG. 13 shows a distribution valve of the second embodiment. The distribution valve of the second embodiment includes two intermediate blocks 60 between the top block 1 and the base block 30. In this case, the distribution valve has a total of 16 outlets.

FIG. 14 shows a distribution valve according to the third embodiment. In the distribution valve of the third embodiment, the intermediate block 60 is omitted, and the top block 1 and the base block 30 are included. In this case, the distribution valve has a total of eight outlets.
That is, since the number of intermediate blocks 60 interposed between the top block 1 and the base block 30 is selected according to the number of lubricant distribution points required, the present invention is a distribution valve with excellent versatility. Can be provided easily.

As a result, even if there are many locations where the lubricant is distributed, the single distribution valve of the present invention can cope with it. Therefore, compared to the case where a plurality of distribution valves are used, the present invention does not require auxiliary metal fittings and piping required for adding a distribution valve, and the installation space required for the distribution valve can be reduced.

In the case of the present invention, the valve housing of the distributing valve is formed by three types of blocks divided into a top block, an intermediate block, and a base block. Compared to the case where such a valve housing is integrally formed by die casting, the three types of locks of the present invention can be formed easily, and the manufacturing cost of these blocks, that is, the valve housing can be reduced.
In particular, the intermediate block can have a common structure, and the cost burden required for manufacturing the intermediate block can be reduced.

Further, the composite path includes a relay section that connects between valve spools (spool storage chambers) in two adjacent blocks. The relay section includes a center bore 103 and a side bore 105 formed in the gasket 2, and an upper surface of the block. And / or a relay hole (vertical hole) formed in the lower surface. Both such bores and relay holes can be formed in a two-dimensional plane. Therefore, in the case of the present invention, the three-dimensionally extending portion is not required for the composite path in the distribution valve, so that the first to third lubricant passages X to Z can be easily and inexpensively formed. .

Further, some of the intermediate blocks 60 can incorporate a valve spool having a diameter different from that of the valve spool in the top block or the base block. Such an intermediate block is incorporated in the distribution valve as necessary, and the amount of lubricant discharged from some discharge ports can be increased or decreased from the amount of lubricant discharged from other discharge ports.
In the case of the present invention, since two or three types of blocks are fastened using the bolt member 110, various distribution valves having different numbers of discharge ports can be assembled easily and easily.

Furthermore, since the gasket 2 has the elastic seal 101, the two adjacent blocks can be sealed under high surface pressure, and the leakage of the lubricant from between the blocks can be effectively prevented. Therefore, even if the required distribution pressure of the lubricant is high, the distribution valve of the present invention can be easily applied.
Moreover, the gasket 2 provided with the elastic seal | sticker 101 like this invention can be similarly used for the seal | sticker between two members in not only the distribution valve mentioned above but various fields.

The distribution valves of the first to third embodiments are merely examples of the present invention, and the present invention is not limited to the distribution valves of the first to third embodiments. That is, it goes without saying that some omissions and replacements of components in the distribution valve, addition of new components, and other changes can be made without departing from the spirit of the present invention.

For example, in each embodiment, each block body incorporates two valve spools in parallel, but three or more valve spools may be incorporated in parallel. Further, two discharge ports are assigned to each valve spool, but three or more discharge ports may be assigned to each valve spool.
The distribution valve of the present invention is not limited to the lubricant and can be applied to various fluid distributions.
Finally, the distribution valve of the present invention can include a seal portion formed integrally with the block body, instead of the gasket. The elastic seal of the gasket may cover the entire surface of the substrate.

1 Top block (first block)
2 Gasket (seal part)
3 First block body 7

Inlet

15a, 15b Valve spool (first spool)
19a to 19d Discharge port (first discharge port)
30 Base block (second block)
33 block body (second block body)
45a, 45b Valve spool (second valve spool)
49a to 49d Discharge port (second discharge port)
60 Intermediate block (third block)
63 block body (third block body)
75a, 75b Valve spool (third valve spool)
79a to 79d Discharge port (third discharge port)
100 Substrate 101 Elastic seal 103 Center bore 105 Side bore X First lubricant path (first fluid path)
Y Second lubricant path (second fluid path)
Z third lubricant path (third fluid path)

Claims

A first block, a first block body, an inlet formed in the first block body and into which fluid is injected, a plurality of first valve spools built in the first block body, and the first block A first discharge port formed in one block body and assigned to each of the first valve spools; and a first fluid path formed in the first block body and into which fluid from the inlet flows. 1 block,
A second block that can be superposed on the first block, the second block body, a plurality of second valve spools built in the second block body, and the second block body; A second block including a second discharge port assigned to each valve spool, and a second fluid passage formed in the second block body and into which fluid from the injection port flows;
A third block which is disposed between the first block and the second block as required and can be overlaid on the first and second blocks, the third block body and the third block body A plurality of third valve spools, a third discharge port formed in the third block body and assigned to each third valve spool, and a fluid formed from the injection port formed in the block body. A third block including a third fluid path into which the fluid flows;
The first to third blocks in a state where the first block and the second block are directly overlapped or at least one third block is interposed between the first block and the second block Comprising a composite path formed by a combination of the first fluid path and the second fluid path or a combination of the first to third fluid paths when
The compound path is a distribution valve in which the valve spool is sequentially reciprocated by the fluid injected from the injection port, and liquid is sequentially discharged from the corresponding discharge port in accordance with the reciprocation of the valve spool.
2. The distribution valve according to claim 1, further comprising a plurality of fastening members that pass through the plurality of blocks stacked on each other and fasten the blocks to each other.
The distribution valve further includes a sealing element interposed between two blocks superimposed on each other,
The composite path includes a relay section that allows connection of two valve spools between two blocks adjacent to each other with the seal element interposed therebetween;
The distribution valve according to claim 1, wherein the relay section includes a bore formed in the sealing element and a relay hole formed in each of the two blocks.
4. The distribution valve according to claim 3, wherein the sealing element further includes a substrate having the plurality of bores and a plurality of elastic seals respectively covering at least an outer periphery of the substrate and an inner periphery of the bore.
A substrate sandwiched between two members to be sealed;
A plurality of bores formed in the substrate;
A gasket comprising a plurality of elastic seals respectively covering at least the outer periphery of the substrate and the inner periphery of the bore.