Work machine

Abstract

A work machine (1) is provided with an upper rotating body (30) capable of rotating relative to a lower traveling body (10). The upper rotating body (30) is provided with: a first multiple solenoid valve (33) which is provided so as to align, in one direction, first solenoid valves (33A) that are driven in accordance with the operation of an operation unit; and a second multiple solenoid valve (34) which is provided so as to be spaced apart in a direction intersecting an alignment direction of the first solenoid valves (33A), and which is provided so as to align, in one direction, second solenoid valves (34A) that are driven in accordance with the operation of the operation unit. In the first multiple solenoid valve (33), piping connection portions (33AA) of the first solenoid valve (33A) are disposed so as to face the second multiple solenoid valve (34) side, and in the second multiple solenoid valve (34), piping connection portions (34AA) of the second solenoid valve (34A) are disposed so as to face the first multiple solenoid valve (33) side.

Description

Work machinery

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

[0002] Patent Document 1 discloses a work machine. The work machine has a lower traveling body and a machine body installed on the lower traveling body. The machine body includes an upper frame supported on the lower traveling body, a hydraulically operated working device, an operating space where an operating device for operating the working device is installed, a control valve that supplies pressure oil to the working device in response to operation of the operating device, and a hydraulic control system solenoid valve having a multiple on-off valve structure and attached to the control valve. The upper frame includes a bottom plate that forms the bottom surface of the machine body, a pair of vertical plates that are upright on the bottom plate and support the working device, a beam plate that is upright on the bottom plate and intersects with the vertical plates, a floor plate that is located above a corner of the bottom plate defined 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 is attached to the area between the exterior panel and the control valve on the vertical or beam plate, with multiple connection ports to which hydraulic hoses are connected aligned vertically.

[0003] Patent Document 1 states 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 in the vertical direction and attached to the area between the exterior panel and the control valve on the vertical board or beam board, making it suitable for small models and reducing the number of parts and part costs.

[0004] When a large number of solenoid valves are required due to the hydraulic control structure, it is difficult to arrange the solenoid valves in the vertical direction as in Patent Document 1.

[0005] Japanese Patent Application Laid-Open No. 2016-172958

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a work machine in which a large number of solenoid valves are appropriately arranged in a limited space.

[0007] To achieve the above object, the present invention is realized by the following configuration. The work machine of the present invention includes a lower traveling body and an upper rotating body that is rotatable relative to the lower traveling body. The upper rotating body includes a first multiple solenoid valve that is arranged in one direction and has a plurality of first solenoid valves that are actuated in response to operation of an operating unit and a plurality of pipe connections corresponding to the plurality of first solenoid valves, and a second multiple solenoid valve that is arranged spaced apart from the first multiple solenoid valve in a direction intersecting the direction in which the first solenoid valves are arranged, the second multiple solenoid valve having a plurality of second solenoid valves that are arranged in one direction and actuated in response to operation of the operating unit and a plurality of pipe connections corresponding to the plurality of second solenoid valves. The pipe connections of the first multiple solenoid valve are arranged to face the second multiple solenoid valve, and the pipe connections of the second multiple solenoid valve are arranged to face the first multiple solenoid valve.

[0008] Fig. 1 is a side view of a work machine according to a first embodiment of the present invention. Fig. 2 is a side view of the work machine showing an exterior panel opened according to the first embodiment of the present invention. Fig. 3 is a top view of a space in which a first multiple solenoid valve, a second multiple solenoid valve, etc. according to the first embodiment of the present invention are arranged. Fig. 4 is a perspective view mainly showing only the first multiple solenoid valve and the second multiple solenoid valve shown in Fig. 3. Fig. 5 is a block diagram showing the drive flow of the first multiple solenoid valve and the second multiple solenoid valve according to the first embodiment of the present invention. Fig. 6 is a front view of the first multiple solenoid valve according to the first embodiment of the present invention.

[0009] Hereinafter, a detailed description will be given of an embodiment of the present invention (hereinafter referred to as an "embodiment") with reference to the accompanying drawings. Note that the same elements are designated by the same numbers or symbols throughout the description of the embodiment.

[0010] 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.

[0011] <<First Embodiment>> A work machine 1 according to a first embodiment of the present invention will be described with reference to Figs. 1 to 6 .

[0012] Fig. 1 is a side view of a work machine 1 according to a first embodiment of the present invention. Fig. 1 is a left side view showing the left side of the work machine 1 when the upper rotating body 30 is viewed 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.

[0013] 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.

[0014] 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, construction machinery, demolition machinery, loading and unloading machinery, agricultural machinery, etc.).

[0015] As shown in Figure 1, the work machine 1 comprises a crawler-type lower running body 10, an upper rotating body 30 attached to the lower running body 10 via a rotating section 20 so as to be able to rotate relative to the lower running body 10, and a work mechanism 40 attached to the upper rotating body 30 so as to be able to perform raising and lowering operations and having an attachment 43 at its tip.

[0016] In this embodiment, the attachment 43 is 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.

[0017] 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.

[0018] In recent years, there are also configurations in which the work machine 1 is remotely operated, so the operating unit does not need to be limited to one that is directly operated by an operator, but may also be an operating unit that is remotely operated.

[0019] Furthermore, because automation is progressing with regard to the traveling of the work machine 1, the operation unit may be an operation unit that supports automatic driving, etc. In any case, the operation unit may be of any shape, etc., 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 output converted into an electric signal.

[0020] The work machine 1 of this embodiment is electrically piloted, and the operating section outputs an electric signal according to the amount of operation.

[0021] 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.

[0022] 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, thereby performing travel, rotation, and operation of the working mechanism 40.

[0023] For hydraulic control in accordance with such electrical signals, the upper rotating body 30 is provided with a first multiple solenoid valve 33 (see FIG. 3) arranged in one direction and having a plurality of first solenoid valves 33A (see FIG. 3) that are arranged in a machine room 32 and are actuated in response to operation of an operating unit in the cab 31, and a second multiple solenoid valve 34 (see FIG. 3) arranged in one direction and having a plurality of second solenoid valves 34A (see FIG. 3) that are actuated in response to operation of an operating unit in the cab 31. Details of the first multiple solenoid valve 33 and the second multiple solenoid valve 34 will be described later.

[0024] The working mechanism 40 comprises a boom 41 including a base end (boom base end) that is capable of being raised and lowered relative to the upper rotating body 30, an arm 42 including a base end (arm base end) that is rotatably mounted relative to the tip of the boom 41, and an attachment 43 (in this example, a bucket) that includes a base end (bucket base end) that is rotatably mounted at the tip of the arm 42.

[0025] The working mechanism 40 also includes a boom cylinder 41A for raising and lowering the boom 41 relative to the upper revolving 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, arm cylinder 42A, and attachment cylinder 43A are all hydraulic cylinders.

[0026] Next, the first multiple solenoid valve 33, the second multiple solenoid valve 34, etc. will be described with reference to Figures 2 to 6. Figure 2 is a diagram showing a state in which an exterior panel 32A is opened in the work machine 1 according to the first embodiment of the present invention. Note that, like Figure 1, Figure 2 is also a left side view of the work machine 1. Furthermore, various mechanical mechanisms are arranged within the machinery room 32, but these mechanical mechanisms etc. are not shown in the drawings.

[0027] As shown in Figure 2, a plate 32B for placing a pail PL is provided in the lower interior portion of the machinery chamber 32 on the side (left side) of the exterior panel 32A, and a first multiple solenoid valve 33 (see Figure 3), a second multiple solenoid valve 34 (see Figure 3), and the like are disposed in the space below the plate 32B. More specifically, each solenoid valve is disposed around a lower opening 35 (described below) provided in the bottom plate of the machinery chamber 32, and a plate-like member is disposed above the solenoid valves so that the pail PL can be placed thereon. Each solenoid valve is surrounded by the bottom plate, the framework (beams) of the upper frame, the center section (standing plate), and the pail placement plate.

[0028] An operator can access the first multiple solenoid valve 33 (see FIG. 3) and the second multiple solenoid valve 34 (see FIG. 3) by inserting his / her hand under the plate 32B from between the plate 32B and the body of the machine room 32. In other words, an operator can insert his / her hand through an opening provided on the side of the machine body and further access each solenoid valve while avoiding the pail can arrangement plate.

[0029] 3 is a top view of the space SP in which the first multiple solenoid valve 33, the second multiple solenoid valve 34, etc. are arranged according to the first embodiment of the present invention. In FIG. 3, the upper side is the front side of the upper rotating body 30, and the lower side is the rear side.

[0030] 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.

[0031] 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, although the left side of the frame line indicating the space SP in Fig. 3 is exactly on the surface of the exterior panel 32A, because the space SP is located to the left of the machine room 32, the right side is on the left inner wall surface of the machine room 32 rather than the center.

[0032] 5 is a block diagram showing the drive flow of the first multiple solenoid valve 33 and the second multiple solenoid valve 34 according to the first embodiment of the present invention. Note that the blocks in FIG. 5 are arranged to make the drive flow easier to understand, and therefore there are some parts that differ from the actual arrangement.

[0033] 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 chamber 32 toward the center.

[0034] 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.

[0035] 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 of the machine room 32 toward the center, and the X1 direction and the X2 direction are approximately parallel.

[0036] In this embodiment, the X1 direction and the X2 direction are generally parallel to each other and therefore refer to 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 hydraulic pressure in accordance with an electric signal corresponding to the amount of operation of the operating unit by the operator.

[0037] 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 arranged spaced apart in a direction (Y1 direction) that intersects the direction in which the first solenoid valves 33A are arranged, more specifically, in a direction that is approximately perpendicular to the direction in which the first solenoid valves 33A are arranged.

[0038] 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.

[0039] In other words, both the pipe connection portion 33AA and the pipe connection portion 34AA are arranged to face the space between the first multiple solenoid valve 33 and the second multiple solenoid valve 34.

[0040] 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 each of the first solenoid valves 33A corresponding to the first solenoid valves 33A is attached to the surface of the base portion 33MB facing upward in the machine chamber 32 (also referred to as the upper surface of the base portion 33MB).

[0041] 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).

[0042] 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 gathered between the first multiple solenoid valve 33 and the second multiple solenoid valve 34, and can be smoothly drawn in together through the lead-in opening OP. The lead-in opening OP is provided on the inner wall surface that is the side wall on the central side of the machine room 32 of the space SP, and is an opening for drawing the hydraulic hoses into the center of the machine room 32.

[0043] 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 the X1 direction and the 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.

[0044] 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.

[0045] 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.

[0046] 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 portion of the 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 lined up.

[0047] 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.

[0048] 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). 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.

[0049] First, the flow of oil will be explained with reference to Figure 5. As shown in Figure 5, the intake port of the pump that supplies hydraulic oil is connected to an oil tank (hydraulic oil tank).

[0050] 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 34. Note that oil from the pump may also be supplied to the second multiple solenoid valve 34 when the hydraulic lock (lever lock) is released.

[0051] 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).

[0052] 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 section by the operator.

[0053] 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.

[0054] Hydraulic control of these 14 solenoid valves performs operations such as the bucket (dump, earth removal), arm (push, pull, two-speed), boom (raise, lower, merge), 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. Note that right forward and right backward described under travel refer to the operation of the right crawler, and left forward and left backward refer to the operation of the left crawler.

[0055] 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 .

[0056] Specifically, as shown in FIG. 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.

[0057] A portion of the supplied hydraulic pressure is then 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.

[0058] 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 inlet 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.

[0059] This is because, in order to ensure that the piping connection portion 33AA of the first solenoid valve 33A of the first multiple solenoid valve 33 and the piping 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.

[0060] For this reason, 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 central side of the machine room 32, and 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-curve. Note that, because high hydraulic pressure is applied to the pilot hose PH2, it is desirable to pipe the hose in a way that avoids sharp bends.

[0061] 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.

[0062] Therefore, keeping in mind the need to appropriately arrange 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 be 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.

[0063] 5, a portion of the hydraulic 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 the hydraulic pressure to the oil tank is connected to the second oil outlet of the second multiple solenoid valve 34.

[0064] 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.

[0065] 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.

[0066] On the other hand, in this embodiment, the position of the second multiple solenoid valve 34 is set so that a tool accessed from the exterior panel 32A side can reach the other side of the second multiple solenoid valve 34 on the machine room 32 side.

[0067] Furthermore, as described above, in order for tools accessed from the exterior panel 32A side to reach the other side of the second multiple solenoid valve 34, it is preferable that the positions of the first multiple solenoid valve 33 and the second multiple solenoid valve 34 be set so that only a portion of the range RG of the first multiple solenoid valve 33 and the second multiple solenoid valve 34 overlap when viewed from a second horizontal direction perpendicular to the first horizontal direction.

[0068] However, since it is difficult to access 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 has a lower opening 35 that allows access to the second multiple solenoid valve 34 from below the machine room 32. The lower opening 35 is formed in the bottom surface (side plate) of the upper rotating body 30.

[0069] In particular, this lower opening 35 also takes into consideration access to the first multiple solenoid valve 33, and is provided so that the lower opening 35 includes the area between the first multiple solenoid valve 33 and the second multiple solenoid valve 34.

[0070] 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. Note that, under normal circumstances, the lower opening 35 is closed by a removable lower cover (not shown).

[0071] 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.

[0072] Specifically, the lower plate portion of the mounting plate 33B is fixed to the bottom surface (bottom plate) that defines 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. The lower plate portion is the portion that is attached to the floor surface of the L-shape of the mounting plate 33B.

[0073] When accessing the first multiple solenoid valve 33 from the exterior panel 32A side, the access is from diagonally above. Therefore, access with tools also has to be 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, the pair of bolts B1 can be easily accessed from above. As a result, by loosening the pair of bolts B1, the first multiple solenoid valve 33 and mounting plate 33B can be removed together for maintenance.

[0074] 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.

[0075] Specifically, a flat mounting plate 34B is fixed at the bottom by a pair of bolts B2 to the inner wall surface of the side wall (a beam provided on the upper frame) that defines the rear side of the space SP, and the second multiple solenoid valve 34 is fixed to the flat mounting plate 34B.

[0076] 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 from below and to access with tools than the bottom surface of the space SP. Therefore, 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.

[0077] The mounting plate 34B does not need to be limited to a flat plate shape, and may be an L-shaped mounting plate like the mounting plate 33B. This mounting plate is L-shaped with a horizontal section extending horizontally from the lower end of the flat mounting plate 34B in Fig. 3. This horizontal section is located below the second multiple solenoid valve 34 and is arranged so as to block part of the lower opening 35. In this way, if something collides with a lower cover (not shown) provided on the lower opening 35 and causes the lower cover to move while the work machine 1 is traveling, it is possible to prevent the lower cover from directly colliding with the second solenoid valve 34A of the second multiple solenoid valve 34.

[0078] Furthermore, if the mounting plate 34B is an L-shaped mounting plate as described above, even if the lower cover (not shown) provided on the lower opening 35 is not attached, it is possible to prevent obstacles (for example, soil, sand, tree branches, scrap iron, etc.) from directly colliding with the second solenoid valve 34A of the second multiple solenoid valve 34.

[0079] 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 when the flat mounting plate 34B is used, by fixing it to the inner wall surface of the side wall that defines the side surface of the space SP.

[0080] Next, referring to Figure 6, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 will be described in more detail, and maintenance procedures for the first multiple solenoid valve 33 and the second multiple solenoid valve 34 will also be described.

[0081] 6 is a front view of the first multiple solenoid valve 33 according to the first embodiment of the present invention, in which the first multiple solenoid valve 33 is viewed from the second multiple solenoid valve 34 side along the second horizontal direction (Y1 direction) so as to view the first multiple solenoid valve 33 from the front.

[0082] 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.

[0083] The second multiple solenoid valve 34 is also basically configured in the same manner as the first multiple solenoid valve 33. Therefore, the description of the first solenoid valve 33A given with reference to Fig. 6 also applies to the second multiple solenoid valve 34 unless otherwise specified.

[0084] 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) to which the plurality of (eight in this example) first solenoid valves 33A can be attached. The base portion 33MB has oil passages that can supply hydraulic pressure to each of the first solenoid valves 33A. The base portion 33MB also has a plurality of pipe connections 33AA that correspond to each of the first solenoid valves 33A.

[0085] Specifically, the first solenoid valve 33A has a pair of through holes (not shown) through which bolts B3 pass, at positions facing each other across the center of the first solenoid valve 33A (the center when the first multiple solenoid valve 33 is viewed from the installation direction), and the pair of bolts B3 are threaded through the through holes into bolt threading portions (not shown) of the base portion 33MB, thereby fixing the first multiple solenoid valve 33 to the base portion 33MB. In other words, each first solenoid valve 33A has a cylindrical valve main body and a pair of extension portions that extend radially outward from the valve main body in a substantially triangular shape, and the through hole is opened in each of the pair of extension portions.

[0086] Each first solenoid valve 33A has a receiving portion CN (connector connection portion) on the side where the pipe connection portion 33AA of the first solenoid valve 33A faces (the side of the second multiple solenoid valve 34). The receiving portion CN has a receiving opening that detachably receives a connection portion (connector) of an electrical wiring (harness) (not shown).

[0087] In other words, the first solenoid valve 33A has a receiving portion CN with its receiving port facing the second multiple solenoid valve 34 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.

[0088] 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 (the Y1 direction in FIG. 3).

[0089] 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 a connection portion (connector) of the electrical wiring (harness).

[0090] That is, the second solenoid valve 34A has a receiving portion CN whose receiving port faces the first multiple solenoid valve 33 side in a second horizontal direction (Y1 direction in FIG. 3) perpendicular to the first horizontal direction (X2 direction in FIG. 3) in which the second solenoid valves 34A are arranged. For the purpose of distinction, the receiving portion CN of the first solenoid valve 33A may be referred to as the first receiving portion, and the receiving portion CN of the second solenoid valve 34A may be referred to as the second receiving portion.

[0091] 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. Note that the receiving portions CN (connector connection portions) of the first solenoid valve 33A and the second solenoid valve 34A also face each other.

[0092] 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.

[0093] 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).

[0094] 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.

[0095] 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).

[0096] 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.

[0097] With the electrical wiring arranged in this manner, the receiving portion CN (connector connection portion) 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.

[0098] 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 portion (connector) from the receiving portion CN (connector connection portion).

[0099] 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.

[0100] 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).

[0101] 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.

[0102] 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.

[0103] If there is a problem with the first solenoid valve 33A, it will be replaced with another first solenoid valve 33A. Note that although the above only describes how to remove the first solenoid valve 33A during maintenance, it goes without saying that once confirmation is complete, the first solenoid valve 33A will be returned to its original state by following the steps in reverse.

[0104] 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 .

[0105] The maintenance work described above is basically performed by accessing through the lower opening 35, but for parts that can be accessed from the exterior panel 32A side, the work may be performed by accessing through the exterior panel 32A side.

[0106] 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.

[0107] For example, the above-described configuration is optimally applied to a work machine 1 in which the upper rotating body 30 protrudes beyond the left-right width of the undercarriage 10 when the upper rotating body 30 rotates, and can also be applied to a type with a small turning radius in which the upper rotating body 30 protrudes only a small amount beyond the left-right width of the undercarriage 10 when the upper rotating body 30 rotates. In terms of tons, which represents the size of the work machine 1, the configuration is preferably applied to a work machine 1 of approximately 10 tons to 35 tons, and even more preferably to a work machine 1 of approximately 10 tons to 20 tons.

[0108] 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.

[0109] 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.

[0110] However, the first multiple solenoid valve 33 and the second multiple solenoid valve 34 do not necessarily have to be equipped with the same number of solenoid valves. For example, either the first multiple solenoid valve 33 or the second multiple solenoid valve 34 may be equipped with eight solenoid valves, and the other may be equipped with six solenoid valves.

[0111] 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.

[0112] 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 to make the installation space too large, 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.

[0113] However, if one bracket were to be configured to have 16 solenoid valves, the weight, including the joints for connecting the hydraulic pipes, could exceed 20 kg.

[0114] 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 portion 33AA (a joint for connecting piping for hydraulic pressure) 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 piping 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 portion 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 multiple (eight in this example) second solenoid valves 34A including the piping connection portion 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 burden 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] It should be noted that 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 are provided in the space SP or on each of the multiple solenoid valves (first multiple solenoid valve 33 and second multiple solenoid valve 34) to prevent dust from accumulating and water from getting in.

[0125] The L-shaped upright section rising from the lower plate section 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. More specifically, there is a gap between the operator's cab 31 and the steel plate that constitutes the machinery room 32, and the L-shaped mounting plate 33B is positioned so that when rainwater seeps in through this gap, the L-shaped upright section can block the rainwater.

[0126] <Other Embodiments> Next, a working machine 1 according to other embodiments of the present invention will be described.

[0127] 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 of the first embodiment may be omitted.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] For this reason, the first multiple solenoid valve 33 (see FIG. 3) and the second multiple solenoid valve 34 (see FIG. 3) in the first embodiment are disposed on the left side of the upper rotating body 30.

[0132] In the first embodiment, the first horizontal direction, which is the arrangement direction of the solenoid valves, the first multiple solenoid valve 33 (see FIG. 3) and the second multiple solenoid valve 34 (see FIG. 3), is from the left side (exterior panel 32A) to the center side (the center side of the machine room 32) of the upper rotating body 30. In other words, the first horizontal direction in the first embodiment is the left-right direction of the upper rotating body 30.

[0133] On the other hand, 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) are arranged may be located on the right side of the upper rotating body 30.

[0134] 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.

[0135] 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.

[0136] Furthermore, 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) 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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).

[0141] 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.

[0142] In the above explanation, the operation content corresponding to the work content of the work machine 1 and the operation amount are output as an output in the form of an electric signal, that is, the work machine 1 is electrically piloted and the operation unit outputs an electric signal corresponding to the operation amount, but the present invention is not limited to this. Similar features of the solenoid valve can be provided for other operation unit structures as well.

[0143] 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.

[0144] A work machine according to a first aspect of the present invention includes a lower traveling body and an upper rotating body rotatably provided relative to the lower traveling body. The upper rotating body has a first multiple solenoid valve, the first multiple solenoid valve having a plurality of first solenoid valves arranged in one direction and actuated in response to operation of an operating unit, and a plurality of pipe connections corresponding to the plurality of first solenoid valves, and a second multiple solenoid valve arranged spaced apart from the first multiple solenoid valve in a direction intersecting the direction in which the first solenoid valves are arranged, the second multiple solenoid valve having a plurality of second solenoid valves arranged in one direction and actuated in response to operation of the operating unit, and a plurality of pipe connections corresponding to the plurality of second solenoid valves, the first multiple solenoid valve being arranged so that the pipe connections face the second multiple solenoid valve, and the second multiple solenoid valve being arranged so that the pipe connections face the first multiple solenoid valve.

[0145] In a second aspect of the present invention, in the work machine of the first aspect, the upper rotating body further has an exterior panel, and the first multiple solenoid valve is arranged closer to the exterior panel than the second multiple solenoid valve.

[0146] In a work machine according to a third aspect of the present invention, in the first or second aspect, the direction in which the pipe connected to the pipe connection portion of the first multiple solenoid valve and the direction in which the pipe connected to the pipe connection portion of the second multiple solenoid valve both face is a first horizontal direction, and 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.

[0147] In a fourth aspect of the present invention, in the work machine of the third aspect, 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.

[0148] In a fifth aspect of the present invention, in the third aspect of the work machine, the first multiple solenoid valve and the second multiple solenoid valve are arranged near the center of the upper rotating body in the fore-and-aft direction, on the left or right side of the upper rotating body, and the first horizontal direction is the left-right direction of the upper rotating body.

[0149] A sixth aspect of the present invention is a work machine in the first or second aspect, wherein the upper rotating body is provided with a horizontal plate having a lower opening through which the first multiple solenoid valve and the second multiple solenoid valve can be accessed from below, and the lower opening is arranged to include the area between the first multiple solenoid valve and the second multiple solenoid valve in a plan view.

[0150] A seventh aspect of the present invention is a work machine according to the sixth aspect, wherein the first solenoid valve is provided with a first receiving portion that is arranged to face the second multiple solenoid valve in a direction perpendicular to the arrangement direction of the first solenoid valves and includes a receiving port that receives a connection portion of an electrical wiring, and the second solenoid valve is provided with a second receiving portion that is arranged to face the first multiple solenoid valve in a direction perpendicular to the arrangement direction of the second solenoid valves and includes a receiving port that receives a connection portion of an electrical wiring.

[0151] The work machine according to an eighth aspect of the present invention is the work machine of the first or second aspect, wherein the first multiple solenoid valve includes four or more of the first solenoid valves, the second multiple solenoid valve includes four or more of the second solenoid valves, and the total number of solenoid valves including the first solenoid valves and the second solenoid valves is 14 or more.

[0152] A work machine according to a ninth aspect of the present invention is the work machine of the first or second aspect, 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.

[0153] In a working machine according to a tenth aspect of the present invention, in the ninth aspect, the operating unit outputs an electric signal according to the amount of operation, and the first solenoid valve and the second solenoid valve are proportionally controlled in accordance with the electric signal.

Claims

1. A work machine comprising: a lower traveling body; and an upper rotating body rotatable relative to the lower traveling body, wherein the upper rotating body has: a first multiple solenoid valve arranged in one direction and having a plurality of first solenoid valves that are driven in response to operation of an operating unit, and a plurality of piping connections corresponding to the plurality of first solenoid valves; and a second multiple solenoid valve arranged spaced apart from the first multiple solenoid valve in a direction intersecting the direction in which the first solenoid valves are arranged, the second multiple solenoid valve having a plurality of second solenoid valves that are arranged in one direction and driven in response to operation of the operating unit, and a plurality of piping connections corresponding to the plurality of second solenoid valves, wherein the piping connection of the first multiple solenoid valve is arranged to face the second multiple solenoid valve, and the piping connection of the second multiple solenoid valve is arranged to face the first multiple solenoid valve.

2. A work machine as set forth in claim 1, wherein the upper rotating body further has an exterior panel, and the first multiple solenoid valve is disposed closer to the exterior panel than the second multiple solenoid valve.

3. A work machine as described in claim 1 or claim 2, wherein the direction in which the pipe connected to the pipe connection portion of the first multiple solenoid valve and the direction in which the pipe connected to the pipe connection portion of the second multiple solenoid valve both face is a first horizontal direction, and the direction in which the first solenoid valves are lined up and the direction in which the second solenoid valves are lined up are the first horizontal direction.

4. A work machine as described in claim 3, wherein the first multiple solenoid valve and the second multiple solenoid valve are arranged in a position where they partially overlap when viewed from a second horizontal direction perpendicular to the first horizontal direction.

5. A work machine as described in claim 3, wherein the first multiple solenoid valve and the second multiple solenoid valve are arranged on the left or right side of the upper rotating body, near the center of the upper rotating body in the fore-and-aft direction, and the first horizontal direction is the left-right direction of the upper rotating body.

6. A work machine as described in claim 1 or claim 2, wherein the upper rotating body is provided with a horizontal plate having a lower opening through which the first multiple solenoid valve and the second multiple solenoid valve can be accessed from below, and the lower opening is arranged to include the area between the first multiple solenoid valve and the second multiple solenoid valve in a plan view.

7. A work machine as described in claim 6, wherein the first solenoid valve is provided with a first receiving portion that is arranged to face the second multiple solenoid valve in a direction perpendicular to the arrangement direction of the first solenoid valve and includes a receiving port that receives a connection portion for electrical wiring, and the second solenoid valve is provided with a second receiving portion that is arranged to face the first multiple solenoid valve in a direction perpendicular to the arrangement direction of the second solenoid valve and includes a receiving port that receives a connection portion for electrical wiring.

8. A work machine as described in claim 1 or claim 2, wherein the first multiple solenoid valve comprises four or more of the first solenoid valves, the second multiple solenoid valve comprises four or more of the second solenoid valves, and the total number of solenoid valves including the first solenoid valves and the second solenoid valves is 14 or more.

9. A work machine according to claim 1 or 2, 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. A work machine as described in claim 9, wherein the operating unit outputs an electrical signal according to the amount of operation, and the first solenoid valve and the second solenoid valve are proportionally controlled in accordance with the electrical signal.

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