Work machine

Abstract

To provide a working machine in which many solenoid valves are arranged in a limited space.SOLUTION: A work machine 1 according to the present invention includes an upper slewing body 30 slewable with respect to a lower travelling body 10, and the upper slewing body 30 includes a first multiple solenoid valve 33 in which first solenoid valves 33A driven in accordance with an operation of an operation unit are arranged in one direction, and a second multiple solenoid valve 34 in which second solenoid valves 33A driven in accordance with an operation of an operation unit are arranged in one direction, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 being spaced apart from each other in a direction intersecting the arrangement direction of the first solenoid valves 34A. The first multiple solenoid valve 33 is arranged so that the pipe connecting portion 33A of the first solenoid valve 33AA faces the second multiple solenoid valve 34, and the second multiple solenoid valve 34 is arranged so that the pipe connecting portion 34A of the second solenoid valve 34AA faces the first multiple solenoid valve 33.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a work machine. [Background technology]

[0002] Patent Document 1 discloses a work machine in which a machine body is installed on a lower traveling body, the machine body comprising an upper frame supported on the lower traveling body, working equipment operated by hydraulic control, an operating space in which an operating device for operating the working equipment is installed, a control valve that supplies pressurized oil to the working equipment in response to operation of the operating device, and a hydraulic control system solenoid valve having multiple on-off valve structures and attached to the control valve, the upper frame comprising a bottom plate that forms the bottom surface of the machine body, a pair of vertical plates that are erected on the bottom plate and support the working equipment, a beam plate that intersects with the vertical plates and erects on the bottom plate, a floor plate that is located above a corner of the bottom plate partitioned by one of the vertical plates and the beam plate and forms the floor surface of the operating space, and a removable exterior panel that externally covers the underfloor space extending below the floor plate, the solenoid valve is installed in the underfloor space together with the control valve, and the work machine is attached to the vertical plate or the beam plate in a state in which multiple connection ports to which hydraulic hoses are connected are aligned in the vertical direction.

[0003] Patent Document 1 also describes that the solenoid valve is installed in the underfloor space together with the control valve, and that the multiple connection ports to which hydraulic hoses are connected are arranged vertically and attached to the area between the exterior panel and the control valve on the vertical plate or beam plate, making it suitable for small models and allowing the number of parts and part costs to be reduced. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-172958 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in order to implement an electric pilot system that outputs the operation content of the operating unit as an electrical signal and performs hydraulic control to drive each drive unit based on that electrical signal, a large number of solenoid valves are required, making it difficult to arrange the solenoid valves in the vertical direction as in Patent Document 1.

[0006] The present invention has been made in view of the above circumstances, and has as its object to provide a work machine in which a large number of solenoid valves are appropriately arranged in a limited space. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention is realized by the following configuration. The work machine of the present invention comprises: a lower running body; an upper rotating body that is rotatably provided with respect to the lower traveling body, The upper rotating body is An operation unit; a first multiple solenoid valve in which first solenoid valves that are driven in response to operation of the operating unit are arranged in one direction; a second multiple solenoid valve, in which second solenoid valves are arranged in one direction and spaced apart from each other in a direction intersecting the arrangement direction of the first solenoid valves, and are driven in response to operation of the operating unit; The first multiple solenoid valve is arranged so that a pipe connection portion of the first solenoid valve faces the second multiple solenoid valve, The second multiple solenoid valve is disposed so that a pipe connection portion of the second solenoid valve faces the first multiple solenoid valve. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a work machine in which a large number of solenoid valves are appropriately arranged in a limited space. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a side view of a work machine according to a first embodiment of the present invention. [Figure 2] 1 is a view showing a state in which an exterior panel of a first embodiment according to the present invention is opened. [Figure 3] 1 is a top view of a space in which a first multiple solenoid valve, a second multiple solenoid valve, and the like according to a first embodiment of the present invention are arranged, as viewed from above. FIG. [Figure 4] FIG. 4 is a perspective view mainly showing only the first multiple solenoid valve and the second multiple solenoid valve shown in FIG. 3. [Figure 5] 1 is a block diagram showing a drive flow of a first multiple solenoid valve and a second multiple solenoid valve according to a first embodiment of the present invention. FIG. [Figure 6] FIG. 1 is a front view of a first multiple solenoid valve according to a first embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mode for carrying out the present invention (hereinafter referred to as an "embodiment") will be described in detail with reference to the accompanying drawings. It should be noted that the same elements are denoted by the same numbers or symbols throughout the description of the embodiments.

[0011] However, please note that in consideration of the ease of viewing the drawings, not all of the same elements are numbered or marked, and some elements are not numbered or marked.

[0012] <<First Embodiment>> A working machine 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG.

[0013] FIG. 1 is a side view of a work machine 1 according to a first embodiment of the present invention. Note that Figure 1 is a left side view showing the side of the work machine 1 that is the left side when looking at the upper rotating body 30 from the rear, with the side where the operator's cab 31 of the upper rotating body 30 is located being the front and the opposite side being the rear.

[0014] In the following explanation, the side of the upper rotating body 30 where the operator's cab 31 is located will be referred to as the front, and the opposite side will be referred to as the rear. When looking at the upper rotating body 30 from the rear, the left side will be referred to as the left, and the right side will be referred to as the right.

[0015] In this embodiment, the work machine 1 is shown as a shovel, but the work machine 1 does not have to be limited to a shovel and may be heavy machinery that requires the installation of a large number of solenoid valves (for example, demolition machinery, loading and unloading machinery, agricultural machinery, etc.).

[0016] As shown in Figure 1, the work machine 1 comprises a crawler-type lower running body 10, an upper rotating body 30 that is rotatably mounted on the lower running body 10 via a rotating section 20, and a work mechanism 40 that is mounted on the upper rotating body 30 so as to be capable of raising and lowering, and has an attachment 43 at its tip.

[0017] In this embodiment, the attachment 43 is shown as a bucket, but it does not have to be limited to a bucket, and for example, something other than a bucket, such as a hydraulic breaker or a crusher, may be used as needed.

[0018] The upper rotating body 30 has a driver's cab 31 at the front, which has an operating section (not shown) where an operator sits and performs various operations, and a machine room 32 located behind the driver's cab 31, which has an exterior panel 32A that can be opened and closed on the left side wall.

[0019] In recent years, remote operation has become common, and therefore the operation unit does not need to be limited to one that is directly operated by an operator, but may also be an operation unit that is remotely operated.

[0020] Furthermore, since automation of driving and the like is progressing, the operation unit may be an operation unit that supports automatic driving. In any case, the operating unit may have any shape as long as it is capable of outputting the operation content and operation amount corresponding to the work content of the work machine 1 as an electrical signal.

[0021] The work machine 1 of this embodiment is electrically piloted, and the operating section outputs an electric signal according to the amount of operation.

[0022] Specifically, the operator operates the operating unit to travel, turn, and operate the working mechanism 40, and the operation content and amount of operation resulting from this operation are converted into an electrical signal and output as an electrical signal.

[0023] Then, proportional control solenoid valves (first solenoid valve 33A and second solenoid valve 34A, which will be described later with reference to FIG. 3) for performing hydraulic control, etc., are proportionally controlled in accordance with the electrical signal, and travel, rotation, and operation of the working mechanism 40 are performed.

[0024] For hydraulic control in accordance with such electrical signals, the upper rotating body 30 is provided with a first multiple solenoid valve 33 (see Figure 3) arranged in one direction, which is disposed in the machine room 32 and has first solenoid valves 33A (see Figure 3) arranged in one direction and which are actuated in response to operation of an operating unit in the operator's cab 31, and a second multiple solenoid valve 34 (see Figure 3) arranged in one direction, which is disposed in the machine room 32 and has second solenoid valves 34A (see Figure 3) arranged in one direction and which are actuated in response to operation of an operating unit in the operator's cab 31. The first multiple solenoid valve 33 and the second multiple solenoid valve 34 will be described in detail later.

[0025] The working mechanism 40 comprises a boom 41 whose base end is capable of being raised and lowered relative to the upper rotating body 30, an arm 42 whose base end is rotatably mounted relative to the tip of the boom 41, and an attachment 43 (in this example, a bucket) whose base end is rotatably mounted to the tip of the arm 42.

[0026] The working mechanism 40 also includes a boom cylinder 41A for raising and lowering the boom 41 relative to the upper rotating body 30, an arm cylinder 42A for rotating the arm 42 relative to the boom 41, and an attachment cylinder 43A for rotating the attachment 43 relative to the arm 42. The boom cylinder 41A, the arm cylinder 42A, and the attachment cylinder 43A are all hydraulic cylinders.

[0027] Next, the first multiple solenoid valve 33, the second multiple solenoid valve 34, etc. will be described with reference to FIGS. FIG. 2 is a diagram showing a state in which the exterior panel 32A of the first embodiment according to the present invention is opened. 2 is a left side view of the work machine 1, similar to FIG. Further, various mechanical mechanisms are arranged in the machine room 32, but these mechanical mechanisms are not shown in the drawings.

[0028] As shown in FIG. 2, a plate 32B for placing a pail PL is provided on the lower side of the machine room 32 on the exterior panel 32A side, and a first multiple solenoid valve 33 (see FIG. 3), a second multiple solenoid valve 34 (see FIG. 3), etc. are arranged in the space below the plate 32B.

[0029] By inserting one's hand under plate 32B between plate 32B and the body of the machine room 32, it is possible to access the first multiple solenoid valve 33 (see Figure 3) and the second multiple solenoid valve 34 (see Figure 3), etc.

[0030] FIG. 3 is a top view of a space SP in which the first multiple solenoid valve 33, the second multiple solenoid valve 34, and the like according to the first embodiment of the present invention are arranged. In FIG. 3, the upper side is the front side of the upper rotating body 30 and the lower side is the rear side.

[0031] FIG. 4 is a perspective view mainly showing only the first multiple solenoid valve 33 and the second multiple solenoid valve 34 shown in FIG.

[0032] 3 and 4, the left side is the exterior panel 32A side, and the right side is the center side of the machine room 32. However, the left side of the frame line indicating the space SP in Figure 3 is exactly aligned with the surface of the exterior panel 32A, but because the space SP is located to the left of the machinery room 32, the right side is on the left inner wall surface rather than the center of the machinery room 32.

[0033] FIG. 5 is a block diagram showing the flow of driving the first multiple solenoid valve 33 and the second multiple solenoid valve 34 according to the first embodiment of the present invention. Please note that the blocks in Figure 5 are arranged to make the drive flow easier to understand, and some parts may differ from the actual arrangement.

[0034] As shown in FIG. 3, the first multiple solenoid valve 33 is an eight-solenoid valve in which eight first solenoid valves 33A are arranged in one direction (X1 direction) from the left side of the machine room 32 toward the center.

[0035] A proportional control solenoid valve is used for the first solenoid valve 33A, and it is possible to proportionally control the hydraulic pressure in accordance with an electric signal corresponding to the amount of operation of the operating part by the operator.

[0036] In addition, the second multiple solenoid valve 34 is an eight-solenoid valve in which eight second solenoid valves 34A are arranged in one direction (X2 direction) from the left side toward the center of the machine room 32, and the X1 direction and the X2 direction are approximately parallel.

[0037] In this embodiment, the X1 direction and the X2 direction are substantially parallel to each other and therefore indicate the same direction, and this direction may be referred to as a first horizontal direction. Similarly to the first solenoid valve 33A, the second solenoid valve 34A also uses a proportional control solenoid valve, which enables proportional control of the hydraulic pressure in accordance with an electrical signal corresponding to the amount of operation of the operating part by the operator.

[0038] As described above, the direction in which the first solenoid valves 33A are arranged (X1 direction) and the direction in which the second solenoid valves 34A are arranged (X2 direction) are approximately parallel, and the second multiple solenoid valves 34 are spaced apart in a direction (Y1 direction) that intersects with the arrangement direction of the first solenoid valves 33A, more specifically, in a direction that is approximately perpendicular to the arrangement direction of the first solenoid valves 33A.

[0039] In addition, the first multiple solenoid valve 33 is positioned so that the piping connection portion 33AA of the first solenoid valve 33A faces the second multiple solenoid valve 34, and the second multiple solenoid valve 34 is positioned so that the piping connection portion 34AA of the second solenoid valve 34A faces the first multiple solenoid valve 33.

[0040] In other words, both the pipe connection portion 33AA and the pipe connection portion AA are arranged so as to face the space between the first multiple solenoid valve 33 and the second multiple solenoid valve .

[0041] Each of the first solenoid valves 33A is attached to a base portion 33MB (see FIG. 6) described below. The pipe connection portion 33AA of the first solenoid valve 33A corresponding to each first solenoid valve 33A is attached to the surface of the base portion 33MB facing upward toward the machine chamber 32 (also referred to as the upper surface of the base portion 33MB).

[0042] The same is true for the piping connection part 34AA of the second solenoid valve 34A, and the piping connection part 34AA corresponding to each second solenoid valve 34A is attached to the surface facing upward toward the machine chamber 32 of the base part to which each second solenoid valve 34A is attached (also called the upper surface of the base part).

[0043] As can be seen from Figure 3, the first hydraulic hose H1 connected to the first solenoid valve 33A and the second hydraulic hose H2 connected to the second solenoid valve 34A are concentrated between the first multiple solenoid valve 33 and the second multiple solenoid valve 34, and the hydraulic hoses provided on the inner wall surface, which is the side wall on the central side of the machine room 32 of the space SP, can be easily pulled together into the pull-in opening OP, which is used to pull the hydraulic hoses toward the central side of the machine room 32.

[0044] Specifically, the directions in which the piping (first hydraulic hose H1 and second hydraulic hose H2) connected to the piping connection portion 33AA of the first solenoid valve 33A and the piping connection portion 34AA of the second solenoid valve 34A both face are the first horizontal direction (see X1 direction and X2 direction), and the directions in which the first solenoid valves 33A and the second solenoid valves 34A are arranged are the first horizontal direction, so that the piping (first hydraulic hose H1 and second hydraulic hose H2) is concentrated between the first multiple solenoid valve 33 and the second multiple solenoid valve 34, and the piping can be pulled in together into the retraction opening OP so that it does not spread out.

[0045] In this way, the piping (first hydraulic hose H1 and second hydraulic hose H2) can be neatly organized so that it does not spread out, and therefore space SP is provided at the center of the machine room 32 of the first multiple solenoid valve 33 where small items, loads, etc. can be placed.

[0046] Similarly, in the space SP, space is provided on the exterior panel 32A side of the second multiple solenoid valve 34 where small items and loads can be placed, for example, an optional solenoid valve can be placed.

[0047] As shown in FIG. 3, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are arranged in a position where only a partial range RG overlaps when viewed from a second horizontal direction (Y1 direction) perpendicular to the first horizontal direction (see X1 direction and X2 direction) in which the solenoid valves (first solenoid valve 33A and second solenoid valve 34A) are aligned.

[0048] On the other hand, if the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are arranged so that they completely overlap when viewed from the second horizontal direction (Y1 direction), for example, by positioning the second multiple solenoid valve 34 as close to the exterior panel 32A as the first multiple solenoid valve 33, it is possible to make the space SP even smaller.

[0049] However, doing so would require a tight bend in the piping for the main hydraulic pressure from the pump (hereinafter also referred to as the pilot hose), so to avoid this, it is preferable that the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are positioned so that only a portion of the range RG overlaps when viewed from the second horizontal direction (Y1 direction), as will be explained in more detail below.

[0050] First, with reference to FIG. 5, the flow of oil will be explained. As shown in FIG. 5, the intake port of a pump that supplies hydraulic oil is connected to an oil tank (hydraulic oil tank).

[0051] Then, when the engine starter is turned on to actually drive the work machine 1, oil from the pump is supplied to the second multiple solenoid valve . When the hydraulic lock (lever lock) is released, oil from the pump may be supplied to the second multiple solenoid valve .

[0052] Specifically, as shown in FIG. 3, a pipe (pilot hose PH3) for supplying oil from the pump is connected to the oil receiving port of the second multiple solenoid valve 34, and oil is supplied from the pump to the oil receiving port (hereinafter, this may also be referred to as the supply of hydraulic pressure).

[0053] A portion of this supplied oil is supplied to the control valve as shown in FIG. 5 under the control of the second solenoid valve 34A, and the working machine 1 is operated in accordance with the operation of the operating unit by the operator.

[0054] As shown in FIG. 5, in this embodiment, six of the eight first solenoid valves 33A of the first multiple solenoid valve 33 are in use, two are reserved for when an option is added, and all eight second solenoid valves 34A of the second multiple solenoid valve 34 are in use.

[0055] The hydraulic control of these 14 solenoid valves performs operations such as the bucket (dumping, earth removal), arm (pushing, pulling, two-speed), boom (raising, lowering, merging), swing (right, left), and travel (right forward, right backward, left forward, left backward) of the work machine 1, as shown in the upper right of Figure 5. In addition, the terms "right forward" and "right backward" used in the description of traveling refer to the operation of the crawler on the right side, and the terms "left forward" and "left backward" refer to the operation of the crawler on the left side.

[0056] As shown in FIG. 5, a portion of the hydraulic pressure supplied to the second multiple solenoid valve 34 is further supplied to the first multiple solenoid valve 33.

[0057] Specifically, as shown in Figure 3, the first oil outlet of the second multiple solenoid valve 34 and the oil receiving inlet of the first multiple solenoid valve 33 are connected by a pipe (pilot hose PH2), and oil pressure is supplied to the first multiple solenoid valve 33 through the pilot hose PH2.

[0058] Then, part of the supplied hydraulic pressure is supplied to the control valve as shown in FIG. 5 under the control of the first solenoid valve 33A, and the working machine 1 is operated in accordance with the operation of the operating section by the operator.

[0059] As can be seen from the connection state of the pilot hose PH2 in Figure 3, the first oil outlet of the second multiple solenoid valve 34 is located on one side of the second multiple solenoid valve 34 facing the exterior panel 32A, and the oil receiving port of the first multiple solenoid valve 33 is located on the other side of the first multiple solenoid valve 33 facing the center of the machine room 32.

[0060] This is because, in order to ensure that the pipe connection portion 33AA of the first solenoid valve 33A of the first multiple solenoid valve 33 and the pipe connection portion 34AA of the second solenoid valve 34A of the second multiple solenoid valve 34 face each other, either the first multiple solenoid valve 33 or the second multiple solenoid valve 34 must be rotated 180 degrees on a horizontal plane.

[0061] Therefore, the pilot hose PH2 is piped from one side edge of the second multiple solenoid valve 34, which is on the exterior panel 32A side, to the other side edge of the first multiple solenoid valve 33, which is on the center side of the machine room 32.If the second multiple solenoid valve 34 is positioned as close to the exterior panel 32A as the first multiple solenoid valve 33, the piping will form a steep S-shaped curve. Furthermore, because high hydraulic pressure is applied to the pilot hose PH2, it is advisable to avoid sharp bends when piping.

[0062] On the other hand, if the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are positioned so that they are just about overlapping when viewed from the second horizontal direction (Y1 direction), for example, if the second multiple solenoid valve 34 is positioned closer to the center of the machine room 32, the pilot hose PH2 can be piped in an almost straight line, but this will require the space SP to be wider in the left-right direction.

[0063] Therefore, when considering the appropriate arrangement of a large number of solenoid valves in a limited space, it is preferable that the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are arranged in a position where only a portion of the range RG overlaps when viewed from a second horizontal direction perpendicular to the first horizontal direction.

[0064] As shown in FIG. 5, a portion of the oil pressure supplied to the second multiple solenoid valve 34 is returned to the oil tank again. For this reason, as shown in FIG. 3, a pipe (pilot hose PH1) for returning oil pressure to the oil tank is connected to the second oil outlet of the second multiple solenoid valve .

[0065] Similarly, the first multiple solenoid valve 33 has an oil outlet connected to a pipe (pilot hose PH4) for returning oil pressure to the oil tank.

[0066] As shown in Figure 3, the first multiple solenoid valve 33 is positioned closer to the exterior panel 32A of the upper rotating body 30 than the second multiple solenoid valve 34 (more specifically, on the exterior panel 32A side of the machine room 32), and is positioned so that maintenance and the like can be easily performed by accessing it from the exterior panel 32A side.

[0067] On the other hand, in this embodiment, the second multiple solenoid valve 34 is also positioned so that the other side of the second multiple solenoid valve 34, which is on the machine room 32 side, can be reached by tools from the exterior panel 32A side.

[0068] Furthermore, in order to position the other side of the second multiple solenoid valve 34 at a position where tools can reach it from the exterior panel 32A side, it is preferable that the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are positioned so that only a portion of the range RG overlaps when viewed from a second horizontal direction perpendicular to the first horizontal direction.

[0069] However, since it is difficult to access and perform work on the second multiple solenoid valve 34 from the exterior panel 32A side, in this embodiment, as shown in Figure 3, the upper rotating body 30 is provided with a lower opening 35 that allows access to the second multiple solenoid valve 34 from the underside of the machine room 32.

[0070] In particular, this lower opening 35 takes into consideration access to the first multiple solenoid valve 33, and is arranged between the first multiple solenoid valve 33 and the second multiple solenoid valve 34.

[0071] That is, the upper rotating body 30 has a lower opening 35 through which the first multiple solenoid valve 33 and the second multiple solenoid valve 34 can be accessed from below. Normally, the lower opening 35 is closed by a removable lower cover (not shown).

[0072] As shown in FIGS. 3 and 4, the first multiple solenoid valve 33 is fixed in the space SP using an L-shaped mounting plate 33B.

[0073] Specifically, the lower plate portion of the mounting plate 33B is fixed to the bottom surface of the space SP with a pair of bolts B1, and the first multiple solenoid valve 33 is fixed to a leg portion that rises in an L shape from the lower plate portion.

[0074] When the first multiple solenoid valve 33 is accessed from the exterior panel 32A side, the access position is from diagonally above. Therefore, tool access is also from above, but if the lower plate portion of the mounting plate 33B is fixed to the bottom surface of the space SP with a pair of bolts B1, it is easy to access the pair of bolts B1 from above.

[0075] On the other hand, as shown in FIGS. 3 and 4, the second multiple solenoid valve 34 is fixed in the space SP using a flat mounting plate 34B.

[0076] Specifically, a flat mounting plate 34B is fixed at the bottom to the inner wall surface, which is the rear side wall of the space SP, with a pair of bolts B2, and the second multiple solenoid valve 34 is fixed to the flat mounting plate 34B.

[0077] For example, when accessing the second multiple solenoid valve 34 from the lower opening 35, the inner wall surface, which is the side wall of the space SP, is easier to see and access with tools than the bottom surface of the space SP, so the second multiple solenoid valve 34 is fixed to the inner wall surface, which is the side wall of the space SP, using a flat mounting plate 34B.

[0078] The mounting plate 34B does not need to be limited to a flat plate shape, but may be an L-shaped mounting plate like the mounting plate 33B. In this way, when the work machine 1 is traveling and something collides with the lower cover (not shown) provided on the lower opening 35 and the lower cover moves, the lower cover can be prevented from directly colliding with the second solenoid valve 34A of the second multiple solenoid valve 34.

[0079] Furthermore, if the mounting plate 34B is an L-shaped mounting plate, even if the lower cover (not shown) provided on the lower opening 35 is not attached, it is possible to prevent obstacles (e.g., earth and sand, tree branches, iron scraps, etc.) from directly colliding with the second solenoid valve 34A of the second multiple solenoid valve 34.

[0080] Even if the mounting plate 34B is replaced with an L-shaped mounting plate, the fixing itself may be performed in the same manner as in the case of the flat mounting plate 34B, by fixing to the inner wall surface that is the side wall of the space SP.

[0081] Next, with reference to FIG. 6, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 will be described in more detail, and the maintenance procedures for the first multiple solenoid valve 33 and the second multiple solenoid valve 34 will also be described.

[0082] FIG. 6 is a front view of the first multiple solenoid valve 33 according to the first embodiment of the present invention. That is, the figure shows the first multiple solenoid valve 33 viewed from the second multiple solenoid valve 34 side in the second horizontal direction (Y1 direction) so as to view the first multiple solenoid valve 33 from the front.

[0083] In FIG. 6, for ease of viewing, hydraulic piping and electrical wiring (harness) connected to the first solenoid valve 33A of the first multiple solenoid valve 33 are omitted.

[0084] The second multiple solenoid valve 34 basically has the same configuration as the first multiple solenoid valve 33. Therefore, the description of the first solenoid valve 33A with reference to FIG. 6 also applies to the second multiple solenoid valve 34 unless otherwise specified.

[0085] As shown in Figure 6, the first multiple solenoid valve 33 includes a plurality of (eight in this example) first solenoid valves 33A, and a base portion 33MB (manifold block) that has an oil passage that can supply hydraulic pressure to each of the first solenoid valves 33A and to which the plurality of (eight in this example) first solenoid valves 33A are attached.

[0086] Specifically, the first solenoid valve 33A has a through hole (not shown) through which a bolt B3 is passed, at a position opposite to the center of the first solenoid valve 33A (the center when looking at the first multiple solenoid valve 33 from the installation direction), and the first multiple solenoid valve 33 is fixed to the base portion 33MB by screwing the bolt B3 through the through hole into a bolt screwing portion (not shown) of the base portion 33MB.

[0087] The first solenoid valve 33A is provided with a receiving portion CN (connector connection portion) on the side facing the piping connection portion 33AA of the first solenoid valve 33A (the side facing the second multiple solenoid valve 34) having a receiving port for detachably receiving a connection portion (connector) of an electrical wiring (harness) not shown.

[0088] In other words, the first solenoid valve 33A has a receiving portion CN with its receiving port facing the second multiple solenoid valve 34 side in a second horizontal direction (Y1 direction in Figure 3) perpendicular to the first horizontal direction (X1 direction in Figure 3) in which the first solenoid valves 33A are arranged.

[0089] As shown in FIG. 3, the second multiple solenoid valve 34 is disposed facing the first multiple solenoid valve 33 in the second horizontal direction (Y1 direction in FIG. 3).

[0090] For this reason, although not shown in Figure 6, the second solenoid valve 34A is provided with a receiving portion CN (connector connection portion) on the side facing the piping connection portion 34AA of the second solenoid valve 34A (the side facing the first multiple solenoid valve 33) having a receiving port for detachably receiving the connection portion (connector) of the electrical wiring (harness).

[0091] In other words, the second solenoid valve 34A has a receiving portion CN with its receiving port facing the first multiple solenoid valve 33 side in a second horizontal direction (Y1 direction in Figure 3) perpendicular to the first horizontal direction (X2 direction in Figure 3) in which the second solenoid valves 34A are arranged. For the sake of distinction, the receiving portion CN of the first solenoid valve 33A may be referred to as a first receiving portion, and the receiving portion CN of the second solenoid valve 34A may be referred to as a second receiving portion.

[0092] As described above, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are arranged facing each other, so that the receiving openings of the receiving portions CN (connector connection portions) of the first solenoid valve 33A and the second solenoid valve 34A also face each other. The receiving portions CN (connector connection portions) of the first solenoid valve 33A and the second solenoid valve 34A also face each other.

[0093] Further, in this embodiment, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are provided with eight first solenoid valves 33A and eight second solenoid valves 34A, respectively.

[0094] Therefore, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 each have eight receiving portions CN (connector connection portions) and eight receiving openings for the receiving portions CN (connector connection portions).

[0095] As explained above, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are arranged in a position where only a portion of the range RG overlaps when viewed from the second horizontal direction (Y1 direction) perpendicular to the first horizontal direction (X1 direction and X2 direction) in which the solenoid valves (first solenoid valve 33A and second solenoid valve 34A) are aligned.

[0096] Therefore, the multiple (eight in this example) receiving portions CN (connector connection portions) and the receiving inlets of the multiple (eight in this example) receiving portions CN of the first multiple solenoid valve 33 and the multiple (eight in this example) receiving portions CN (connector connection portions) and the receiving inlets of the multiple (eight in this example) receiving portions CN of the second multiple solenoid valve 34 face each other so that some of the receiving portions CN (connector connection portions) and some of the receiving inlets of the receiving portions CN overlap when viewed from the second horizontal direction (Y1 direction).

[0097] The electrical wiring connected to the first multiple solenoid valve 33 and the second multiple solenoid valve 34 is concentrated between the first multiple solenoid valve 33 and the second multiple solenoid valve 34, similar to the first hydraulic hose H1 and the second hydraulic hose H2 described above.

[0098] With the electrical wiring arranged in this manner, the receiving portions CN (connector connection portions) of the first solenoid valve 33A and the second solenoid valve 34A can be easily accessed from the lower opening 35 provided between the first multiple solenoid valve 33 and the second multiple solenoid valve 34.

[0099] Furthermore, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are spaced apart in the second horizontal direction (Y1 direction in Figure 3) across the lower opening 35 when viewed from above, so there is sufficient space to remove the electrical wiring connection part (connector) from the receiving part CN (connector connection part).

[0100] In addition, the attachment and detachment of the electrical wiring connection parts (connectors) does not have to be limited to being performed by accessing the receiving parts CN (connector connection parts) of the first solenoid valve 33A and the second solenoid valve 34A from the lower opening 35, but may also be performed by accessing them from the exterior panel 32A side.

[0101] The maintenance procedure for the first multiple solenoid valve 33 is to first remove the electrical wiring connection (connector) from the receiving portion CN (connector connection portion) of the first solenoid valve 33A and check that there are no problems with the electrical wiring connection (connector).

[0102] Next, remove the bolt B3 that secures the first solenoid valve 33A, pull out the first solenoid valve 33A from the base portion 33MB (manifold block) on which it is mounted, and check that there are no problems with the first solenoid valve 33A.

[0103] In this case, too, a cutout space is required, but since the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are spaced apart in the second horizontal direction (Y1 direction in Figure 3) across the lower opening 35 when viewed from above, sufficient cutout space is ensured.

[0104] If there is a problem with the first solenoid valve 33A, it will be replaced with another first solenoid valve 33A. In the above, only the removal of the first solenoid valve 33A during maintenance has been explained, but of course, once the inspection is complete, the first solenoid valve 33A will be returned to its original state by following the procedure in reverse.

[0105] Furthermore, the maintenance procedure for the second multiple solenoid valve 34 is the same as the maintenance procedure for the first multiple solenoid valve 33.

[0106] The maintenance work described above is basically performed by accessing from the lower opening 35, but for parts that can be accessed from the exterior panel 32A side, it may be performed by accessing from the exterior panel 32A side.

[0107] According to the above-described embodiment, not only can a large number of solenoid valves be arranged even when there is not enough vertical height, but also when viewed horizontally, the hydraulic piping (first hydraulic hose H1, second hydraulic hose H2, and pilot hoses PH1, PH2, PH3, PH4) can be neatly bundled without causing any unnecessary bends, allowing a large number of solenoid valves to be arranged in a small space.

[0108] For example, the above-described configuration is best applied to a work machine 1 in which the upper rotating body 30 protrudes beyond the left and right width of the lower running body 10 when the upper rotating body 30 rotates, and can also be applied to a type in which the turning radius is small and the amount by which the upper rotating body 30 protrudes beyond the left and right width of the lower running body 10 when the upper rotating body 30 rotates is small. In terms of tonnage, which represents the size of the work machine 1, it is suitable for use with a work machine 1 of approximately 10 tons to 35 tons, and more preferably for use with a work machine 1 of approximately 10 tons to 20 tons.

[0109] Furthermore, if only one of the first multiple solenoid valve 33 and the second multiple solenoid valve 34 is provided with a large number of solenoid valves, the length of the multiple solenoid valve having the large number of solenoid valves will increase.

[0110] For this reason, it is preferable that the first multiple solenoid valve 33 has four or more first solenoid valves 33A and the second multiple solenoid valve 34 has four or more second solenoid valves 34A, so that neither one has a large number of solenoid valves.

[0111] However, the number of solenoid valves provided in the first multiple solenoid valve 33 and the second multiple solenoid valve 34 does not have to be the same. For example, either the first multiple solenoid valve 33 or the second multiple solenoid valve 34 may include eight solenoid valves, and the other may include six solenoid valves.

[0112] Furthermore, although the number of solenoid valves required for electric piloting varies depending on the type of work machine 1, it is preferable to have 14 or more solenoid valves in total, including the first solenoid valves 33A and the second solenoid valves 34A, as in this embodiment.

[0113] On the other hand, since it is considered that a total of about 20 solenoid valves, including the first solenoid valves 33A and the second solenoid valves 34A, is sufficient, and taking into consideration not requiring too much installation space, it is preferable that the total number of solenoid valves, including the first solenoid valves 33A and the second solenoid valves 34A, be 20 or less.

[0114] However, if a single bracket were to be configured to have 16 solenoid valves, the weight, including the joints for connecting the hydraulic pipes, could exceed 20 kg. On the other hand, in the case of the first multiple solenoid valve 33, the total weight of the eight first solenoid valves 33A, the mounting plate 33B, and the piping connection part 33AA (joint for connecting piping for hydraulic pressure), etc. can be kept well below 20 kg.

[0115] The first multiple solenoid valve 33 having a plurality of (eight in this example) first solenoid valves 33A including the mounting plate 33B and the pipe connection portion 33AA may be referred to as a first multiple solenoid valve unit.

[0116] Specifically, the first multiple solenoid valve unit of this embodiment has a total weight of less than 10 kg.

[0117] Similarly, in the second multiple solenoid valve 34, the total weight of the eight second solenoid valves 34A, the mounting plate 34B, and the piping connection part 34AA (joint for connecting hydraulic piping), etc. can be kept well below 20 kg.

[0118] The second multiple solenoid valve 34 having the mounting plate 34B and the plurality of (eight in this example) second solenoid valves 34A including the pipe connection portions 34AA may be referred to as a second multiple solenoid valve unit.

[0119] Specifically, the second multiple solenoid valve unit of this embodiment also has a total weight of less than 10 kg.

[0120] Therefore, the total weight of the first multiple solenoid valve unit and the second multiple solenoid valve unit of this embodiment is less than 20 kg.

[0121] In this way, if the total weight of the first multiple solenoid valve 33 and the second multiple solenoid valve 34 can be made less than 20 kg, the load on the assembly worker can be reduced.

[0122] The weight of the first solenoid valve 33A and the second solenoid valve 34A varies slightly depending on the type.

[0123] However, by limiting the number of solenoid valves to a number that allows the total weight of each of the first multiple solenoid valve 33 and the second multiple solenoid valve 34 to be less than 20 kg, the burden on the assembly worker can be reduced.

[0124] In addition, rainwater, sand, dust, etc. may fall into the space SP through gaps in the guard that forms the roof of the machine room 32. For this reason, members for preventing dust accumulation and water damage are provided on the space SP or on each of the multiple solenoid valves (first multiple solenoid valve 33 and second multiple solenoid valve 34).

[0125] The L-shaped upright leg that rises from the lower plate portion of the L-shaped mounting plate 33B that secures the first multiple solenoid valve 33 also serves to prevent rainwater and the like from hitting the first solenoid valve 33A.

[0126] <<Other embodiments>> Next, a working machine 1 according to another embodiment of the present invention will be described. In the other embodiments, the basic configuration is similar to that of the first embodiment, and therefore, a description of the same points as those in the first embodiment may be omitted.

[0127] In the first embodiment, as shown in Figures 1 and 2, an exterior panel 32A that has access to a space SP (see Figure 3) in which the first multiple solenoid valve 33 (see Figure 3) and the second multiple solenoid valve 34 (see Figure 3) are arranged is located near the center of the upper rotating body 30 in the fore-and-aft direction.

[0128] As can be seen from this, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are disposed near the center of the upper swing body 30 in the front-to-rear direction.

[0129] Furthermore, in the first embodiment, as described above, the space SP (see Figure 3) in which the first multiple solenoid valve 33 (see Figure 3) and the second multiple solenoid valve 34 (see Figure 3) of the first embodiment are arranged is located on the left side of the upper rotating body 30.

[0130] For this reason, the first multiple solenoid valve 33 (see FIG. 3) and the second multiple solenoid valve 34 (see FIG. 3) of the first embodiment are disposed on the left side of the upper swing body 30.

[0131] In the first embodiment, the first horizontal direction, which is the arrangement direction of the solenoid valves of the first multiple solenoid valve 33 (see Figure 3) and the second multiple solenoid valve 34 (see Figure 3), is from the left side (exterior panel 32A) of the upper rotating body 30 to the center side (center side of the machine room 32). That is, the first horizontal direction in the first embodiment is the left-right direction of the upper rotating body 30.

[0132] On the other hand, the space SP (see FIG. 3) in which the first multiple solenoid valve 33 (see FIG. 3) and the second multiple solenoid valve 34 (see FIG. 3) are arranged may be located on the right side of the upper rotating body 30.

[0133] In this case, an exterior panel 32A that can be opened and closed may be provided on the right side of the upper rotating body 30.

[0134] Therefore, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 may be positioned near the center of the upper rotating body 30 in the fore-and-aft direction, on the left or right side of the upper rotating body 30, and the first horizontal direction may be the left-right direction of the upper rotating body 30.

[0135] Furthermore, a space SP (see Figure 3) in which the first multiple solenoid valve 33 (see Figure 3) and the second multiple solenoid valve 34 (see Figure 3) are arranged may be provided on the front or rear side of the upper rotating body 30, near the center of the upper rotating body 30 in the left-right direction.

[0136] In this case, the first multiple solenoid valve 33 (see Figure 3) and the second multiple solenoid valve 34 (see Figure 3) will be positioned on the front or rear side of the upper rotating body 30, near the center in the left-right direction of the upper rotating body 30.

[0137] In this case, the first horizontal direction is the fore-and-aft direction of the upper rotating body 30, and the hydraulic piping (first hydraulic hose H1, second hydraulic hose H2, and pilot hoses PH1, PH2, PH3, PH4) can be neatly bundled without causing any unnecessary bends and pulled into the center of the machine room 32.

[0138] In addition, an exterior panel 32A that can be opened and closed may be provided on the front or rear side of the upper rotating body 30.

[0139] In addition, in the work machine 1, it is considered that it would be more suitable in terms of layout to provide the space SP (see Figure 3) in which the first multiple solenoid valve 33 (see Figure 3) and the second multiple solenoid valve 34 (see Figure 3), etc. are arranged on the left or right side of the upper rotating body 30 (on the left or right side of the machine room 32).

[0140] For this reason, it is considered preferable that the first multiple solenoid valve 33 and the second multiple solenoid valve 34 are positioned near the center of the upper rotating body 30 in the fore-and-aft direction, on the left or right side of the upper rotating body 30, and that the first horizontal direction is the left-right direction of the upper rotating body 30.

[0141] The present invention has been described above based on specific embodiments, but the present invention is not limited to the above embodiments, and modifications and improvements to the above embodiments are also included within the technical scope of the invention, which will be clear to those skilled in the art from the description of the claims. [Explanation of symbols]

[0142] 1···Work machine, 10···Undercarriage, 20···Slewing section, 30···Upper swinging section, 31···Operator's cab, 32···Machine room, 32A···Exterior panel, 32B···Plate, 33···First multiple solenoid valve, 33A···First solenoid valve, 33AA···Pipe connection section, 33B···Mounting plate, 33MB···Base section 33, 34···Second multiple solenoid valve, 34A···Second solenoid valve, 34AA···Pipe connection section, 3 4B···Mounting plate, 40···Work mechanism, 41···Boom, 41A···Boom cylinder, 42···Arm, 42A···Arm cylinder, 43···Attachment, 43A···Attachment cylinder, B1, B2, B3···Bolt, CN···Receiving part, H1···First hydraulic hose, H2···Second hydraulic hose, OP···Inlet opening, PH1, PH2, PH3, PH4···Pilot hose, RG···Range, SP···Space

Claims

1. A work machine, The work machine includes: a lower running body; an upper rotating body that is rotatably provided with respect to the lower traveling body, The upper rotating body is An operation unit; a first multiple solenoid valve including first solenoid valves arranged in one direction and driven in response to operation of the operating unit; a second multiple solenoid valve, in which second solenoid valves are arranged in one direction and spaced apart from each other in a direction intersecting the arrangement direction of the first solenoid valves, and are driven in response to operation of the operating unit, The first multiple solenoid valve is arranged so that a pipe connection portion of the first solenoid valve faces the second multiple solenoid valve, The second multiple solenoid valve is disposed so that a pipe connection portion of the second solenoid valve faces the first multiple solenoid valve.

2. The work machine according to claim 1 , wherein the first multiple solenoid valve is disposed closer to an exterior panel of the upper rotating body than the second multiple solenoid valve.

3. a direction in which a pipe connected to a pipe connection portion of the first solenoid valve and a direction in which a pipe connected to a pipe connection portion of the second solenoid valve both face is a first horizontal direction; 3. The work machine according to claim 1, wherein the direction in which the first solenoid valves are arranged and the direction in which the second solenoid valves are arranged are the first horizontal direction.

4. The work machine according to claim 3 , wherein the first multiple solenoid valve and the second multiple solenoid valve are arranged in positions where they partially overlap when viewed from a second horizontal direction that is perpendicular to the first horizontal direction.

5. the first multiple solenoid valve and the second multiple solenoid valve are disposed near the center of the upper rotating body in the front-rear direction, on the left or right side of the upper rotating body, The work machine according to claim 3 , wherein the first horizontal direction is a left-right direction of the upper rotating body.

6. the upper rotating body includes a lower opening through which the first multiple solenoid valve and the second multiple solenoid valve can be accessed from below, 3. The work machine according to claim 1, wherein the lower opening is provided between the first multiple solenoid valve and the second multiple solenoid valve.

7. the first solenoid valve includes a first receiving portion having a receiving opening facing the second multiple solenoid valve in a direction perpendicular to the arrangement direction of the first solenoid valves, the receiving opening receiving a connection portion of an electrical wiring; 7. The work machine according to claim 6, wherein the second solenoid valve is provided with a second receiving portion having a receiving opening facing the first multiple solenoid valve side in a direction perpendicular to the arrangement direction of the second solenoid valves, for receiving a connection portion of an electrical wiring.

8. the first multiple solenoid valve includes four or more first solenoid valves; the second multiple solenoid valve includes four or more second solenoid valves; 3. The work machine according to claim 1, wherein the work machine has a total of 14 or more solenoid valves including the first solenoid valves and the second solenoid valves.

9. 3. The work machine according to claim 1, wherein the first solenoid valve and the second solenoid valve are proportional control solenoid valves that can be controlled in accordance with the amount of operation of the operating unit.

10. The work machine according to claim 9 , wherein the operation unit outputs an electric signal corresponding to the amount of operation, and the first solenoid valve and the second solenoid valve are proportionally controlled in accordance with the electric signal.

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